Good afternoon everyone. I have a diamond jack, I lost the handle from it, it was made in the form of a hook. Raising a car with such a jack without a handle is not very convenient. In two or three stores I asked about a pen, they didn’t have one, so it was decided to come up with something else. Therefore, it was decided to modernize this jack, so to speak. Moreover, it is necessary to install summer wheels, winter has passed.
So, we take a grinder and carefully saw off this eye, where we had to put the hook-handle in order for the jack to spin.
So I sawed off the ear. 
Now we need to find, or rather select, a head that we will weld instead of our eye. So I picked up such a head for myself; you don’t need to do anything additional with it, you just need to weld it well. 
Now let's take welding machine and weld the head. 
It turns out like this.
After welding, I ground this place a little, but did not grind it too much so that a little iron remained for hardness. 
With such a head it is easy to turn the jack and lift the car, it is especially convenient to turn it with a ratchet. 
Yesterday I tried the jack in action, changed all four wheels, put on summer tires, and working with the jack became simply convenient and easy.
Well, that seems to be all, if this article helps anyone, I will be very glad. The idea came from Alexey from Tambov.
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
Works hydraulic jack By 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 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, has a 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, the rod of which is fitted with a removable lever. The body is mounted on a 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. You can see the detailed design in the drawing.
Rolling hydraulic jack
Jack maintenance and repair
The most common malfunction is leakage 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 is a reliable device that allows you to lift loads 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 (changing 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. In beautiful flowers, all the 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 a 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 runs 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.
A hydraulic jack is distinguished by its ability to lift a large mass of cargo (from two to two hundred tons), low effort of the person working with it, high efficiency, smooth lifting, and 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 an 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, an indispensable assistant during rescue operations. 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 clamp, which is attached to the shaft using a cotter pin through 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 a thread is cut in the other internal thread M12.
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)
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.
Motorists, and especially those who like to spend a couple of free hours in the garage, are people who have genetic level a talent is developed to obtain practical benefits from available things. They don’t have to be persuaded to do new experiments or be tested new way fix, assemble, or remove something without owning a specialized tool.
Why invent something new when in three or four hours and practically for free you can assemble a jack with your own hands– useful, practical and indispensable tool for every car owner.
The photo shows types of jacks and methods of their use
Car jack - universal device, capable of supporting structures weighing up to two tons, and sometimes more, for days. It's like a third hand for a car mechanic: super strong, durable and one hundred percent effective.
Simplicity of design and abundance of varieties functional tool allows you to make an exact analogy of any branded jack with your own hands.
How to make a screw jack
The classic and most common diamond-shaped jack is the screw jack. Make one like this DIY jack- a matter of two hours, especially if you have one and a half to two meters of channel and a basic set of fasteners. The compact tool will easily fit in the trunk, and in any emergency and unforeseen situation you will praise yourself for your foresight and intelligence.
Many people know how to assemble a jack from a channel, but have never tried it. There are only five elements, and the tool is already 90% ready:
- Levers made of bent steel channel with equal flange sides - 4 pcs;
- Channel fragments for the lower and upper arms (the lower arm can be replaced with a wider and more stable base);
- Rubber gasket (on the upper shoulder, for the jack);
- Axles holding the upper and lower arms (pins with heads on the axle, secured with cotter pins);
- A threaded screw secured to the shaft on one side.
On preparatory stage Drill holes at the joints of the elements, and then begin assembly. Connect the shoulders, secure them together and on the bases. Insert the threaded screw into the shaft and check the homemade jack for lifting force.
The photo shows a diagram of the screw jack assembly
As you can see, a simple method that does not require welding and professional equipment (except for an electric drill), takes only an hour or two of time, and does not damage the budget.
How to make a jack from an air spring
It’s a completely different matter when a jack is needed for more serious work than, for example, changing a wheel on the road:
- Lifting vehicles weighing more than 2 tons;
- Work in the inspection pit;
- Professional activity in car service;
- Lifting a car in hard-to-reach places.
In cases where classic screw models cannot cope, homemade hydraulic jacks made from air springs come to the rescue: they are relevant not only for cars, but also for other heavy-lifting loads - safes, workbenches, large-sized furniture.
To build a homemade air jack, you will need a minimum of materials:
- Air spring from a bus or truck;
- Air hose + supply and bleed system;
- Cushion stand + car lining;
- Compressor (which, by the way, can also be made with your own hands).
Details about how to make a jack with your own hands from an air spring, watch the video https://www.youtube.com/watch?v=vg8z68ObTEA.
In the same way, you can make a pit “lift” (for an inspection ditch), or rolling jack: The type of air bag does not matter.
In the photo - pneumatic (rolling) jacks
How to make a rack and pinion jack
He always comes to the rescue when other models are powerless, and human imagination and physical capabilities are exhausted. A rack and pinion jack will help if you need:
- Raise the motorcycle to a height;
- Lift a truck, bus, train or truck body;
- Pull the car out of off-road conditions (mud, sand, swamp, stones);
- Raise the car by the tow bar.
There are no secrets in how to make a rack model; it only takes three steps and about an hour of time:
- From the existing slats, weld one, elongated (1.5 - 2 meters, depending on needs);
- Weld a stable base to them;
- Put on top a jacking mechanism with a heel, found in the bins of the garage (or purchased by agreement with a neighbor).
If desired, it is possible to additionally make fasteners for such a device, allowing you to lift the car by the wheel rims.
Simple manipulations and a little spatial imagination will allow you to save money and assemble the device with your own hands, without which not a single replacement of wheels or other parts of the suspension is complete. And when the right approach and proper use of resources, a homemade jack will help you out in many situational troubles.
Before you get to work and make a pneumatic jack with your own hands, you should know more about such an auxiliary tool.
An inflatable jack is the most basic option of all analogues. The convenience of such a tool is that it is unpretentious to use; it does not require a flat surface. Having such a jack in the trunk and getting into a marshy, loose area, you can not be afraid to use it. In addition, with the help of it you can not only replace a problem wheel, but also get out of the mud. When working with it, no special physical effort is required, which is why it is even used in rigging work.
Working principle of pneumatic lift
The main working element of this jack is a rubberized cushion. It is made from a special durable material so that the unit can withstand loads within 4-5 tons.
To operate such a tool, it is placed under the bottom of the car and connected to a pump or other air source, such as a compressor or a compressed gas cylinder. There are models that are especially popular, since their work can be carried out, you just need to connect such a jack to the exhaust gases of the car. There is no need for them to acquire additional equipment. Such structures are called air jacks or pneumodocrates.
For such a device, a hose is enough to connect the exhaust pipe and the jack itself, and then turn on the engine. Literally 2 minutes are enough for the tool to do its job. In this version of the device there are no complex mechanisms that operate using pneumatics.
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Technical characteristics of pneumatic jacks
There are three main points by which such a device is assessed:
- Load capacity. For the tool to be safe to use, this figure must exceed the weight of the vehicle itself. If the car is a passenger car, then the load capacity should be 1.5-2 tons, and if the car is of the Gazelle type - 2.5-3 tons.
- Pickup height. This parameter is worth paying attention to Special attention, if the car has low ground clearance. You should also be interested in this point if the car often gets stuck in the mud. It is best if this characteristic is within 10 cm.
- Lifting height. For pneumatic models, this figure does not exceed 50 cm. But in fact, this is enough to cope with changing wheels. If you use a jack, which is used to perform rigging work, and it, in turn, is connected to compressors, then this characteristic will be greater - up to 70 cm.
In any case, when choosing a jack, you should focus on your personal car and the conditions in which it is most often found.
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How to make a jack with your own hands
You will need the following items:
- an old truck cushion;
- bolt of the appropriate diameter;
- a ball that can be freely located in the bolt;
- wheel bolt from Zhiguli;
- chamber fitting;
- drill.
The structure is assembled from these components. A bolt is screwed into the hole of the pillow, focusing on the existing thread. You should drill a hole in it in advance into which the chamber fitting will be inserted.
The role of the valve will be performed by a wheel bolt from a Zhiguli, in which a hole should be made. Now these elements need to be connected. But before this is done, a ball is placed in the existing outlet so that during operation it can close the hole, then air will not escape.
To use such a device, you will need a special pump. The jack is installed under the bottom of the car. In such a device you will need to use a small wooden block, which will rest against the car. If desired, you can attach a trolley with wheels to the bottom part, then it will be a rolling jack.
There is one inconvenience of this homemade device. The truck cushion has enough big sizes. Therefore, if the car is low-slung, then it will have to be constantly raised in order to place a jack.
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Lifting Strength: Key Points
There are several options for how a jack can lift a car:
- Pneumatics. In this option, the lifting of the load is carried out thanks to the force compressed air. Such models operate both from the equipment and from the vehicle exhaust gases themselves. Air enters the chamber, and it, in turn, begins to increase in volume, due to which the transport rises. The convenience of using such models is that special effort is not included, and if you have a compressor, the process takes only a few seconds.
- Mechanical. To use this analogue, you need to make twisting movements with the handle or use another similar method. Such jacks are quite affordable and also have small dimensions.
- Hydraulic. The principle is similar to the previous version, the only difference is that in in this case less effort will be expended. This is due to the fact that the device has a liquid in its design, which ensures that the plunger with a load is pushed out due to the pressure generated. This option has a long service life.
- Mechanical with electric drive. In this option, electricity does all the work for a person. The conveniences here are undeniable, but only as long as there is food. As soon as the lights are turned off, you will have to work in the same way as ordinary mechanical ones, the only difference being that more effort will be required.
Depending on the scope of application of the jack, the required model is selected.
Despite the fact that a pneumatic jack is the easiest to use, there are also some nuances in its use. To avoid the tool flying out from under the machine, it should be stowed correctly. Therefore, before using new device, it is better to pump it empty once, after which it goes down and folds properly on its own. During the work process, it would be useful to cover the surface of the floor and jack with some kind of rugs. This will protect the instrument from damage.
The materials for making the camera are based on PVC, and it, in turn, becomes quite rough as soon as frost appears outside. It is optimal to use until the thermometer shows -10, then operation becomes difficult.
The convenience of such a jack is that it can be used to lift a car from almost a minimum height. And if you don’t want to spend money, you can always make it yourself.
