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.
Perhaps the most important quality of a homemade jack is ensuring the proper level of safety. There are many types of tools for lifting loads. But in fact, they are almost always relatively simple. This is due to the fact that reliability is the most important quality of a lifting mechanism. And the simpler it is, the better it works.
Probably every good owner has a jack in his tool kit. And those who often have to lift loads, repair a car, or change wheels know that, according to safety regulations, it is necessary to install several units of lifting tools for insurance.
Of course, an ordinary solid object can be used as a backup option. For example, everyone is familiar with laying bricks. But such a makeshift approach simply cannot inspire the necessary confidence. Therefore, sometimes you can approach the issue of safety more thoroughly and make a homemade jack for the garage. Moreover, this work does not involve any special difficulties.
The following types are popular today:
- screw;
- rack and pinion;
- pneumatic;
- hydraulic.
Each type of jack has its own advantages and disadvantages. Some are simpler in design (and therefore easier to assemble with your own hands), while others are considered the most reliable and powerful.
Screw
Device screw jack as simple and time-tested as possible. For this reason, these types are considered the most common. Often, it is precisely these jacks that are included in standard motorist kits.
But, despite the fact that they are easy to assemble, it will be very difficult to reproduce the mechanism yourself, because you will need to repeat the special thread pattern that is applied to the lifting lever and stop. The teeth are given a trapezoidal shape for the following reasons:
- such a thread has a self-extinguishing function (does not unwind under the influence of a load);
- the transmitting force is increased many times (use limits: from 500 kilograms to 10 tons), which ensures ease of operation.
Such lifting tools are no more expensive than other analogues, so there is little point in creating a homemade screw jack.
Rack and pinion
Rack structures are used primarily for lifting loads to great heights. They also have optimally calculated force.
The mechanism is also quite complex. The technological effectiveness lies in the fact that the lever gradually sets in motion the gear, which moves along a vertical rack with special locking holes.
It is difficult to make a rack structure with your own hands.
Pneumatic
Pneumatic or bottle jacks work on the principle of pumping compressed air into a special container, which squeezes out the rod and lifts the load. Such models have good load capacity, and the range is limited only by the length of the lifting rack.
You can make a homemade pneumatic design by purchasing only the main mechanism with compressed air. And the levers and additional details(wheels, stops) it is quite possible to do it yourself, having previously calculated everything.
Hydraulic
Perhaps the most the best option A lifting mechanism made by yourself can be called hydraulic. As a rule, the design involves the creation of a rolling mechanism on wheels and ease of lifting.
The principle of operation of a hydraulic jack is the same as that of a pneumatic one. Only raises the rod does not compressed air, and oil having a low compression ratio. For this reason, hydraulic jacks are used in professional auto repair shops (some models are capable of lifting loads of up to 20 tons).
And, of course, if you reproduce the design in your own garage, you will get a useful and irreplaceable tool.
A container with oil and a lever for operation are purchased. And all other elements are designed as needed.
How to make a garage jack with your own hands
Among the large number of home schemes homemade devices Screw and hydraulic mechanisms are popular. And if in the first case excellent skills in thread cutting are required (done complex shape), then the hydraulic option is easier to make.
Building a circuit
Hydraulic homemade jack is great for independent use. And there is no doubt about its ability to ensure safety, because the oil cannot unexpectedly lose its properties and fall from its maintained level. Therefore, when working, it is important to pay attention, perhaps, only to the strength of the levers and their reliability.
Popular diagram of a homemade hydraulic jack
Selection of material and preparation of tools
IN homemade design It is important to take care of strength. Therefore, as building material metal is selected. For the frame use:
- channel 10 millimeters;
- channel 12;
- rods 12 millimeters;
- wheels for moving;
- rubber part for cup device;
- fastening material.
To adjust the material you will need:
- welding machine;
- grinder with circles for cutting metal and grinding;
- metal drills;
- wrenches and screwdrivers;
- measuring tool: tape measure, ruler, marker.
The supporting part is secured by welding to create a solid and strong structure. The upper rotating parts are attached to bolts or rods.
Assembly of the structure
First, an L-shaped base is created from a 12 mm channel. A hydraulic bottle jack is attached to it. Afterwards, using bolts, the upper lip is attached to the base, on which the jack rod will act. The rod is secured using a rotating rod.
Additional equipment in production are wheels (suitable from an old household appliances). They will help you move the large structure around the garage.
An example of a homemade hydraulic jack
Checking for correct operation
Of course, after completing the assembly, it is important to check the resulting homemade jack under “combat conditions.” The hydraulics are designed to lift even a heavy vehicle. Therefore, we check the work under load. A car is best. By the way, tests will reveal design flaws and errors.
And only after checking (even repeatedly) the homemade jack is ready for full operation.
Features of operating a homemade jack
The person who made it is responsible for the work of the homemade product. Therefore, no matter how much confidence we have that a homemade jack will withstand the weight, we use an additional jack for insurance if we are working under a car.
But this rule applies even to a purchased model, because it has long been known: safety precautions are written based on errors. Unfortunately, often fatal.
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
The hydraulic jack works 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”
Dimensions: 720 x 540 pixels, format: jpg.
DIY rolling jack
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There are a total of 59 presentations in the “Objects” topic
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, 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)
