The problem of lifting loads large mass has been facing humanity for quite a long time. IN last years To solve this problem, jacks are increasingly being used. Stands apart in this series hydraulic jack. He is capable of lifting really heavy loads with a minimum of effort. Hydraulics, since the advent of science, has come to the aid of man. There are situations when a lift of this kind is simply necessary, but there is no way to purchase it. How to make a homemade jack?
Design and its features
Of course, before you start working, you definitely need to learn more about the design of a hydraulic jack. In fact, it is not as complicated as it might seem at first glance. The main elements are a housing, a pump, a plunger, and a screw with a lifting heel. A hydraulic jack is most often made of hardened steel. In this case, the working fluid is a special oil with high viscosity. Regular motor oil will not work in this situation.
It is worth taking this into account when developing the device. Typically, the body is the main part of a hydraulic jack. It serves not only as a reservoir for the working fluid, but also as a real cylinder for the piston. The device of this design implies the presence of safety valves that ensure uninterrupted operation. It is equipped with a hand or foot pump.
The oil is drained using a special handle, which is part of the mechanism. The lifting mechanism and a special retractable hydraulic cylinder are capable of raising the working platform. Enough is being created high pressure, which allows you to lift loads of various masses. The body of such a device can be either short or elongated. The second option is most often used when carrying out repair work heavy equipment. For example, it could be a bus or a heavy vehicle.
The main function of a jack is to lift a car wheel in order to replace it or a tire. The jack is used for self-replacement car wheels in the absence of repair services. Also, sometimes you have to crawl under the bottom of the car in order to carry out repair work. The jack will come in handy in this case too.
Outside of the automotive field, jacks are often used to install structures at the required level during construction and repair work, when lifting loads in warehouses and spare parts in workshops.
You can read about how the crosspiece is replaced in detailed material our author.
You may also be interested in information on how to choose and securely fasten with your own hands.
The important characteristics of the jack are listed below.
- Load capacity. Each of the jacks has limitations on this parameter. When manufacturing the device, it is necessary to take into account the weight of the vehicle. It is also necessary to take into account the weight of the cargo in the luggage compartment.
- Lifting height. This parameter is especially important for cars with low bottoms. In this case, the lifting height must be acceptable to allow one to climb under the car and carry out repair work.
- Pickup height. This is the height of the instrument. This parameter must be compatible with the vehicle's ground clearance (distance from the surface to the lowest point). This parameter is different for each individual model. It is necessary to select the pick-up height so that it is comfortable to work.
There are jacks various types by drive type.
- Mechanical type, in which lifting occurs by pressing the handle. These jacks are intended for infrequent use. Such devices are compact, but require physical effort.
- Hydraulic type. Similar to the previous one, but requires less effort. The wheel rises due to the pressure created by the working fluid. Great for frequent use.
- Pneumatic type. The device operates using compressed gases. Gas cylinders are required for use. The gas creates pressure, the chamber increases in size, and the car begins to rise. No physical effort is required.
You will find detailed information on how to make it yourself in the material from our specialist.
Our expert will tell you in detail how to make a working one with your own hands step by step.
You can read information about making it yourself in the article by our specialist.
According to the operating principle, jacks are divided into screw, rack and pinion, pneumatic and hydraulic. Jacks can be stationary, mobile or portable. Homemade devices most often they are portable, as they have small sizes. Stationary jacks are intended for large loads and are rarely of interest to car owners.
How to make a car jack with your own hands?
DIY hydraulic jack
Hydraulic jacks should be given Special attention, since they have the highest load capacity, which is important when working with trucks or SUVs. It is possible to manufacture hydraulic jacks with different sizes and characteristics. Modern mechanisms They are used not only in service stations and auto repair shops, but even in the oil refining industry. The device can operate in both horizontal and vertical planes.
The main load-bearing elements of the device: a housing, a working fluid (most often it is oil) and a retractable piston. The body can be short or elongated. At the same time, it is made of hardened steel so that the structure can withstand the required level of loads. The housing serves as a guide cylinder for the piston and a reservoir for the working fluid.
The lifting device and the retractable cylinder are located in the housing openings. The descent is carried out by turning the T-shaped handle. The equipment is equipped with polyamide wheels, ensuring maneuverability. The extended body is designed for heavy-duty vehicles.
Hydraulic lifting mechanisms are the most common and convenient, so let's start with them. The manufacture of a hydraulic jack is as follows. You will need welding machine, hacksaw, angular Grinder with metal disc, steel profile for construction.
Hydraulic jacks come in standard, trolley, bottle, hybrid, toe and diamond jacks. The manufacturing process of a conventional hydraulic jack is described in detail below. There are many drawings on the Internet from which these mechanisms are assembled.
- First, a support platform for the mechanism is created. A steel rectangular profile measuring 50 by 50 millimeters is suitable. It is necessary to cut 4 parts 300 millimeters long from the profile. Lay these parts with the side walls facing each other and weld the joining seams from the bottom and top.
- Make stands and stops. Saw off 2 parts from the profiled pipe. The length of the parts is calculated relative to the maximum stroke of the rod, then the height of the jack and the support platform is added to this. The stop is made of the same material. Its length is equal to the width of the support platform. The stop and the posts are connected welded seam, a U-shaped structure is welded to the base.
- Manufacturing a removable stop that can move along guides and apply pressure to the workpiece. It is made from several pieces of steel strip one centimeter thick. The length of the parts should be less than the distance formed between the posts. The resulting parts are connected in several places by welding. When installing the block on the press frame from a hydraulic jack, it is necessary to select 2 bolts with washers and nuts and connect the resulting plates to the block so that they are located on both sides of the racks. If necessary, you can reduce the distance between the moving stop and top beam design when installing an intermediate square profile.
When manufacturing a rack jack, it is important to take into account that the stability of this structure is affected by the strength of fixation and the quality of the supporting platform. It is important to assemble the mechanism in such a way that the product does not move out during operation. The force applied when lifting loads depends on the maximum possible mass.
The process of making a rack jack is quite simple. You need to take 2 rack pipes and a welding machine. The pipes must be welded in such a way that they resemble truncated pyramid. Next is taken steel sheet 5 mm thick. The upper and lower bases of the mechanism are made. A hole is made in the upper part, into which a nut must subsequently be welded. A hole is also made in the lower base. Next, a mechanical rod is inserted there for rotation.
To make the mechanism, it is better to use parts made of hardened steel. If you additionally attach a metal cable, the rack and pinion jack can, if necessary, replace the winch. The average carrying capacity of such a product will be from 5 to 20 tons.
DIY rolling jack
A rolling jack is easy to make, using as a basis a bottle unit with a pick-up height of about 23 centimeters and a channel of 10 and 12 millimeters. Bottle jack is the simplest mechanism of this kind. Despite this, it is used for repairing freight vehicles. The operating principle of the jack is based on the use of several working rods. The mechanism is based on a piston.
Lifting occurs using a lever, which is driven by a hydraulic cylinder. A rack is created from a 12-millimeter channel, and a lifting lever and base are made from a ten-millimeter channel. Rollers from a regular one are installed in front washing machine. The cup is taken from a car bumper, and the braces are created from a 20 mm bar.
As a result, the operating principle of a rolling jack is similar to a bottle jack, but the axis of the working cylinder in this mechanism is located in the horizontal axis. The piston is not directly combined with the pickup. This mechanism received the name “rolling” due to the fact that in appearance it resembles a cart on wheels rolling on a flat surface.
When the lever is raised, the jack moves under the load (car). The mechanism is driven by touching the lever and lowered by turning the valve screw. If the car needs to be lowered, the tubular handle is mounted on the valve screw. The partition then fits into its groove. The screw rotates with the handle, relieving pressure in the working cylinder.
A screw jack consists of: a base, a lower and an upper arm, a stop and a screw mechanism. A metal base (assortment) is taken, having a cross-sectional area of 2.63 cm square. 4 through holes are drilled, with a diameter similar to the diameter of the pin. It is advisable to attach the base to a wider removable platform. Next, the upper and lower arms are made from a metal base.
The shaft is made of metal rod. The diameter of the rod is 12 millimeters. There should be a thread at one end, and a retainer at the other, attached to the shaft with a pin through through hole. An axis is made around which the shoulders rotate. The axles on both sides are pins with flat cylindrical heads, secured with cotter pins. A through hole with a diameter of 10 millimeters is drilled in one of the stops, and in the second internal thread. The clamp acts as a fastening of the shaft on the rotation side and transmits torque to the shaft.
The screw jack can be made in three various variations: with trapezoidal thread, diamond-shaped, lever-screw.
More detailed information You can read about the positive and negative sides in the article by our author.
It is relatively easy to make a jack from an air spring with your own hands, given that this type of unit is a very interesting device. Pneumatic jacks are indispensable when it comes to precise installation. When working on uneven or loose surfaces, such a lifting mechanism is indispensable. A rubber-cord flat shell made of reinforced fabric is the basis of the device. The shell expands when compressed air is supplied. The device is also quite complex in terms of design.
So, to make the mechanism you will need following materials: an old cushion from a truck, a bolt, a ball that can act as a bearing, a wheel bolt from a VAZ, a chamber fitting and a drill.
You need to screw a bolt into the hole of the pillow. Before this, you need to drill a hole in the bolt that will be occupied by the fitting. It is also necessary to make a hole in the VAZ wheel bolt. It will act as a valve. The elements are connected. A ball is placed in the existing outlet, blocking the passage of air during operation. A pump is required to use the device. The jack will be located under the bottom of the car. You will also need wooden block, resting against the car.
DIY electric jack
Homemade jack it is not difficult to make for a car with your own hands, if we are talking about mechanical devices that work on the physical efforts of users, compressed air and working fluid. It is somewhat more difficult to make an electric jack with your own hands.
Electric lifting mechanisms are the result of the synthesis of mechanical moving components and an electric drive. Such a jack can be powered from the vehicle's electrical network. You can connect the device via the cigarette lighter.
The starting materials for manufacturing may be different. Motors for window lifters are suitable (as an example, you can take a motor from the “ten”). The drive and cables must be removed, leaving only the motor and gearbox. You will need a head whose tetrahedral side is equipped with edges of 7 millimeters. The base can be a regular screw diamond jack.
Our task is to create electric drive so as not to exert effort when using it. The fastenings are made of steel strips. The fasteners must be trimmed and given the desired configuration, and then attached to the gearbox. The mount and the head on the gearbox are welded to the device. The device can be controlled using a button from the window lifter mechanism.
Device comparison
Screw jacks with trapezoidal threads maintain a simple design, low weight and ease of operation with a high load capacity. The rhombic design of such mechanisms is distinguished by the presence of a long drive handle, which reduces the required effort to lift the load. The design is also lightweight and has good stability.
- Lever-screw lifting mechanisms are distinguished by their large lifting heights and small dimensions.
- Post-screw jacks have high stability and rigidity.
- Constructions rack type differ in their ability to be used in different directions and ease of operation, as well as a high lifting force.
- Bottle hydraulic jacks have the most simple design And high rigidity connections during operation. The effort required for lifting is minimal.
- Rolling jacks are stable, have a small initial installation height and considerable rigidity during operation.
- Electric jacks perform best in extreme conditions, do not require physical effort and are highly accurate and stable.
- Pneumatic lifting mechanisms provide convenient and reliable use due to their large bearing surfaces. They are also distinguished by their quietness and good operating speed, high efficiency and unpretentiousness. (6 ratings, average: 5,00 out of 5)
Having a drawing at hand - a screw jack, we make it with our own hands from equal-flange bent steel channels GOST 8278-83.
The types of sizes of the used assortment are highlighted in blue rectangles in the figure.
The screw jack consists of the following parts:
Base
Lower shoulder
Upper shoulder
Emphasis
Screw mechanism
BASE
We will make it from assortment with a cross-sectional area of 2.63 (cm²). We drill four through holes with a diameter equal to the diameter of the pin. When drilling, strictly maintain the center distance between them. If necessary, the base can be attached to a wider removable platform.
LOWER SHOULDER
We will make it from a range of sections with a cross-sectional area of 1.99 (cm²) by analogy with the base.
UPPER SHOULDER
We will make it from a range with a cross-sectional area of 2.28 (cm²) by analogy with the lower arm.
UPOR
We will make it from a range with a cross-sectional area of 1.99 (cm²) by analogy with the upper shoulder.
We attach a rubber gasket on top.
SCREW MECHANISM
1. Shaft - screw. Let's make it from a metal rod with a diameter of twelve millimeters. On one side there is an M12 thread, on the other there is a retainer, which is attached to the shaft using a cotter pin through a through hole on the shaft.
2. Axis - stop. Relative to which the rotation of the lower and upper shoulders occurs.
The axles on both sides are pins with cylindrical flat heads, which are attached to the axle using cotter pins.
A through hole with a diameter of ten millimeters is drilled in one stop, and an M12 internal thread is cut in the other.
3. Latch. Fixes the shaft on the side of its rotation and provides the ability to transmit torque to the shaft.
Performance characteristics of a self-made screw jack.
A jack is used to lift a car to repair or replace a wheel. They are different designs. The most common are mechanical and hydraulic. In this article we will consider in detail the principle of operation and design of a hydraulic jack, as well as various options designs.
Working principle of a hydraulic jack
This device is simple and reliable.
If you follow the storage and operating conditions, it will serve you for a very long time.
A jack is used to lift a car
A hydraulic jack works according to the following principle, which allows you to lift a car weighing several tons, and sometimes several tens of tons.
The device is not complicated - it is two communicating vessels of different diameters filled with liquid and several valves. As you can see, everything is quite simple and if all the details are made of high quality durable materials, then there is nothing to break here.
Only subject to wear rubber seals pistons and cylinder seals.
The working cylinder, the rod of which lifts the car, large diameter, but the main cylinder has a diameter several times smaller.
This is the principle of operation of the entire device. The master cylinder is driven by a lever, oil through check valve hits the slave cylinder and lifts it. Reinforcement is created due to the difference in cross-sectional areas of the cylinders.
Do-it-yourself rolling garage jack | Blueprints
The full stroke of the main one ensures a slight movement of the second one. The difference in stroke between two cylinders is proportional to the difference in their diameters. Thanks to this, a person, without making any serious effort, can lift five, ten, or several tens of tons.
A check valve is used to prevent oil from flowing back into the reservoir. Liquid can only flow through this valve in one direction.
There is another valve that opens manually; it is necessary to allow the fluid to flow back and lower the raised car to its original state.
The principle of operation and its structure are shown in the diagram.
Hydraulic jack design
Two types are used for lifting cars: bottle and rolling.
Bottle Type Hydraulic Jack
So, a bottle-type hydraulic jack.
It consists of a vertical body of large diameter and an adjacent small cylinder, to the rod of which a removable lever fits. The housing is installed on support platform, it often has a screw extension in the rod, which is necessary in order to increase the lifting height. The two cylinders are connected to each other through a check valve.
The housing has a reservoir to store extra oil and a bypass valve to lower the hydraulic bottle jack rod.
All parts must be made of durable alloys, so they experience significant loads and are protected from corrosion.
The design of another type, the rolling hydraulic jack, differs only in the location of the cylinders and the presence of a large platform on rollers.
Lifting a car using a hydraulic rolling device is carried out not by the rod itself, but by a lever connected to it. A metal coin is installed on this lever.
The rolling structure is more stable than the bottle structure and the likelihood that the raised car will shift and fall off the support is much less.
Despite this, safety precautions must always be followed during operation. Be sure to secure the vehicle using the parking brake, the transmission in gear, and placing wheel chocks.
When working under a raised vehicle, always install a safety stand. These measures will help protect the safety of the working person. Detailed design you can see in the drawing.
Rolling hydraulic jack
Jack maintenance and repair
Most frequent malfunction is the flow of working fluid through seals and seals.
It is necessary to accurately determine the location of the leak and repair it. Only special oil-resistant seals and gaskets should be used. Valve failure may be due to clogged or broken springs.
It is necessary to disassemble, clean and replace faulty parts.
But they need to be stored only in their original state, so that the rod is completely hidden in the body, this will protect it from corrosion. In addition, the bottle type must be stored vertically to prevent the working fluid from leaking out. Once every few years the working fluid needs to be replaced. This is a simple procedure. There is a filling hole on the body, closed with a screw cap.
Through this hole, the oil is drained and filled with new oil. After this, it is necessary, without load, to completely raise and lower the rod several times. This will release any air that may have entered the system.
This reliable device, allowing you to lift a load of several tens of tons.
It is not complicated. In terms of lifting capacity, hydraulics are significantly ahead of other types of designs. But, unfortunately, there are also disadvantages:
- Heavy weight, really heavy, several times heavier than mechanical competitors.
- Special storage conditions to preserve the working fluid and the risk of corrosion of working elements. This is especially true for bottle-type jacks.
- impossibility of use at low temperatures.
Hydraulic fluid thickens at temperatures below -25 degrees, the elasticity of seals is lost, and the risk of failure increases.
After analyzing the advantages and disadvantages various designs we can come to the following conclusion.
For use with a passenger car, weighing up to two tons for the necessary road repairs(replacing a wheel) a compact mechanical jack is sufficient. But to lift a large and heavy machine, it is better to consider using hydraulics.
Picture 4 from the presentation “Tools in the Garage”
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DIY rolling jack
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Nice holiday cards and for every day
Technique: Quilling 1.
If you want a beautiful and "real" flower, you need to make the same flowers.
Of course, it is better to use a ruler with circles. If you additionally make a decorative braid, it must be wiped until each edge is covered.
Get some paper tape, a ruler, and a rolling and rolling tool.
Rollins are shaped like a flower petal.
fourth
If you need decorative embroidery.
Among the flowers.
Collect a flower. Everything in beautiful flowers flower petals are the same. I use this template to edit flower petals properly.
Of course, there are special rulers that are sold in the store and are certainly very convenient, etc.
But the frog strangled me, and I wanted to keep the flower together. So I drew the diagram myself. But the flowers come with different flower petals, and then they come to me too lazy, but not to draw the same for all options by hand.
So I made suggestions on my computer.
I work with these patterns and secrets.
The numbers indicate the number of petals in the flower. It should be noted that pattern 12 is very useful as it contains a pattern for the colors 3, 4, 6 and 12 roosters!!!
fourteenth
fifteenth
sixteenth
seventeenth
eighteenth
So print out the template and pick up the flower on the template.
If the core is above the petals, then we are only resting on the flower petals. Stretch the glue only at the ends of the petals, and it is advisable to leave the flower on the template until the glue dries completely!
nineteenth
twentieth
And then we glue the core together.
twenty first
twenty second
For a voluminous flower you also need to make a sepal.
twenty third
And then attach it to the stem (I do this with glue).
twenty-fourth
And insert a flower.
twenty fifth
If the core is at petal level, place it in the middle and then crush the flowers. And if the flower petals don't stick to each other, they lift the glue flower onto each leaf to the center.
Jack jack connector
twenty-sixth
The result is a fairly durable flower and can be used for both bulk and chests.
twenty seventh
Also with the help of the template it is suitable for blooming flowers with several levels:
Fill 6 petals with a core, make two empty ropes and connect them to each other using the templates for 12 petals and in addition you can place needle flowers.
twenty-eighth
twenty-ninth
I put foam under the template.
thirties
thirty first
IN handmade vase with flowers (http://stranamasterov.ru/node/18967) I made all the flowers using the template for 10 and 6 petals:
thirty second
If the flower is well attached to the paper, in this case the template should be placed under the sheet and illuminated with a lamp under these sheets. You can also use glass and window (damage should only be vertical).
You can use these patterns not only to create flowers, but also to link mandalas, wreaths, snowflakes, etc.
Hope this is all helpful! If anyone needs templates written with more high resolution, write to me and send them with pleasure (the quality of proposals has been reduced according to the site rules).
I wish you all creative success!!!
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Hydraulic jack is stationary, portable, mobile mechanical device to lift any object, it is located under it, which makes it possible to do without auxiliary structures or hoists. The mechanism works on mineral oil, which, by moving the differential piston of the pump, lifts the load. It is a means of mechanizing work in various sectors of the national economy.
The hydraulic jack is distinguished by the ability to lift a large mass of cargo (from two to two hundred tons), with little effort when working with it, high coefficient useful action, smooth lifting, structural strength.
The disadvantages of powerful mechanisms are their large mass, the initial distance from the parking level of the lifted load, the slow single movement of the piston, and high cost.
Types of jacks
Available in various modifications: bottle, rolling, diamond, two-level, low-hook hook. They differ in design and type of drive.
The bottle jack is used in various areas of the economy; it is distinguished by its simple design and convenient operation. Used for lifting and lowering special equipment, passenger cars, and trucks. During construction, it is possible to lift a building with its help. The main condition is that the weight of the load being lifted must correspond to the lifting capacity of the mechanism specified in the instructions.
The rolling jack works on the bottle jack principle.
The supporting area is placed on a lever, which is raised by the working piston. The lifting height allows you to lift a car of any brand weighing up to three tons.
It has varieties: scissor, with a two-piston cylindrical displacer, elongated.
Jack device
The main parts of a mechanism capable of raising and lowering a load are: a lever - a crossbar rotating around an axis, a plunger - a hollow cylindrical rod.
Valves are shut-off and control valves for passing, shutting off, and regulating the flow of hydraulic oil.
Oil storage, reciprocating movement mechanism inside the cylinder.
When the pump operates, hydraulic fluid fills the base of the cylinder and lifts the cylindrical part upward. As a result, the load rises. A device designed to maintain pressure at the required level consists of suction and discharge valves.
The suction prevents the oil from returning from the cylinder to the reservoir, the discharge prevents it from leaving it. By unscrewing the screw, the pressure decreases and the load falls into place.
Hydraulic oil has the property of non-compression, which affects the uniformity of raising, lowering, and securing the object at the desired height.
Simultaneously, lifting mechanisms They have low operating speed and are difficult to store and move.
Vertical, to prevent oil leakage, are transported while standing. They require regular monitoring of the oil level, condition of seals, valves (no hydraulic oil leakage).
A hydraulic jack is used in everyday life for all kinds of work when it is necessary to lift a load.
The most common use in the prevention and repair of automotive equipment.
Items Maintenance in most cases they are equipped with rolling jacks. Often used during construction and installation work, laying gas and oil pipelines, indispensable assistant when conducting rescue work. Universal mechanism, can be used in any life situations when lifting the load is necessary.
Drawing of a screw jack with your own hands
Having a drawing at hand - a screw jack, we make it with our own hands from equal-flange bent steel channels GOST 8278-83.
The types of sizes of the used assortment are highlighted in blue rectangles in the figure.
The screw jack consists of the following parts:
Base
Lower shoulder
Upper shoulder
Emphasis
Screw mechanism
BASE
We will make it from assortment with a cross-sectional area of 2.63 (cm²).
We drill four through holes with a diameter equal to the diameter of the pin. When drilling, strictly maintain the center distance between them. If necessary, the base can be attached to a wider removable platform.
LOWER SHOULDER
We will make it from a range of sections with a cross-sectional area of 1.99 (cm²) by analogy with the base.
UPPER SHOULDER
We will make it from a range with a cross-sectional area of 2.28 (cm²) by analogy with the lower arm.
UPOR
We will make it from a range with a cross-sectional area of 1.99 (cm²) by analogy with the upper shoulder.
We attach a rubber gasket on top.
SCREW MECHANISM
Shaft - screw.
Reliable homemade jack
Let's make it from a metal rod with a diameter of twelve millimeters. On one side there is an M12 thread, on the other there is a retainer, which is attached to the shaft using a cotter pin through a through hole on the shaft.
The axis is the stop. Relative to which the rotation of the lower and upper shoulders occurs.
The axles on both sides are pins with cylindrical flat heads, which are attached to the axle using cotter pins.
A through hole with a diameter of ten millimeters is drilled in one stop, and an M12 internal thread is cut in the other.
3. Latch. Fixes the shaft on the side of its rotation and provides the ability to transmit torque to the shaft.
Performance characteristics of a self-made screw jack:
Hmin = 65 (mm)
Hmax = 312 (mm)
Pmax = 2000 (kg)
A jack is a device that should be located both in the trunk of a car and in the car enthusiast’s garage. In this case, it is better to choose a more massive second option with universal functionality and a high load capacity. These characteristics are 100% consistent with your own hands, which is not difficult to do.
Characteristics of the pneumatic device
There are three main criteria by which a homemade inflatable jack is evaluated:
- Load capacity indicator. To provide safe operation this value must exceed the weight of the vehicle. For a passenger car, characteristics of about two tons will be sufficient; servicing heavier vehicles requires a carrying capacity of at least 2.5 tons.
- Pickup height. This aspect plays important role, if the car has low ground clearance. The optimal indicator is a value of at least 100 mm.
- Lift level. A homemade pneumatic jack has a height of no more than 500 mm. This reserve is quite enough for changing wheels and some other work; a rigging unit with a connection to a compressor allows you to raise the car up to 70-80 cm.
Definitely, when choosing a jack and its manufacture, first of all you need to focus on your car, the conditions of its operation and storage.
How to make a jack yourself?
To build a jack with your own hands, you will not need much material and effort. You need to select the following details:
- a used truck cushion;
- suitable bolt;
- ball element;
- VAZ wheel clamp;
- union;
- The main tool is a drill.
The structure is assembled from the presented elements. A bolt is screwed into the hole of the pillow. First you need to make a socket in it for the fitting from the camera.
A wheel bolt from a VAZ is used as a valve, in which a hole is drilled. On next stage the existing elements are connected after a ball is installed in the hole, which will serve for air intake.
Peculiarities
For practical implementation This device requires a special pump. An inflatable jack is installed under the bottom of the vehicle. To be on the safe side, it is advisable to use wooden stand, which will interact directly with the machine.
This mechanism has one significant drawback. Since the cargo cushion is quite large, a low-slung vehicle will have to be first raised to install the device in question. If you attach a cart with wheels to the bottom of such units, you will get homemade ones for cars.
Comparative characteristics
The pneumatic version lifts the load due to the compression force of the air mass. Such modifications work by connecting to additional equipment or from car exhaust. Air mass enters the camera. Thanks to compression and increase in volume, the car rises. The advantage of the models is that there is no need to special effort, and if available compressor unit the process takes just seconds.
A mechanical jack for a car involves putting it into operation by rotating or twisting a special handle. Such modifications have a low price and compact size.
The hydraulic principle is similar to mechanical option. The difference lies in the simplification of the process of pumping out the working part of the jack, due to the presence of liquid in the working system. Similar modifications have long term services.
Mechanical jack with electric drive works from mains power, all the main work of the device is carried out by electricity. The advantages of the device are undeniable, but it requires connecting it to an outlet.
Security measures
Despite the fact that the inflatable jack is one of the most basic in operational terms, its use requires compliance with certain precautions.
To avoid the unit flying out from under the car, it must be installed correctly. Before installing a new pneumatic device, it is advisable to deflate it once without load, after which it deflates and stacks itself accordingly. To protect the jack from damage, it is better to lay a rug on the floor.
For the manufacture of the working chamber of the device, PVC-based materials are suitable. At sub-zero temperature such a structure hardens and becomes rough. As experts note, optimal temperature conditions operation is up to -10 degrees.
Hydraulic lifting device
It is quite possible to make a hydraulic jack with your own hands. It is based on a housing, the main load-bearing function is performed by a retractable piston and working fluid (oil). Variations of the device can be made with a shortened or extended steel frame. The housing serves as a container for oil and a guide cylinder for the piston.
A special adjusting screw with a lifting heel is screwed into the plunger; if necessary, you can increase the maximum lifting height. Such a device is equipped with a manual, foot or air drive.
The working mechanism and the retractable cylinder are located in the holes of the frame. The unit is lowered by turning the T-handle. Some devices are equipped with polyamide wheels for maneuverability. Operational safety is ensured by safety valves.
Pros and cons of a hydraulic device
Before making a jack with your own hands, you should consider all its pros and cons. The advantages of a hydraulic device include the following indicators:
- the device is unpretentious in maintenance and operation with a fairly high power rating;
- smooth movement of the working rod, reliable fixation of the load at the required height, precise braking;
- high efficiency (up to 80%) and load capacity (over 150 tons).
Disadvantages of use hydraulic model include a high initial lifting height, the problem of precision in adjusting the lowering position, a decent price and quite a lot of weight. The device must only be stored and transported vertically, otherwise the working fluid may leak out.
Conclusion
Making a jack with your own hands will not be much of a problem. Depending on the capabilities, scope of use and other objective circumstances, you should choose the right model for the type of work. Suitable for use on the road compact device mechanical or hydraulic type, and in the garage an inexpensive and practical pneumatic device will perform well.