people since ancient times had problems lifting a heavy load on high, it usually attracts a lot of people, and erected a bulky design, which do not always have a heavy-duty, and because often broke, causing casualties.The remedy came with the invention of such a machine is a hydraulic jack that is widely used today.This setting, in contrast to the winches has greater reliability and is capable of lifting large loads at a lower cost.
- hydraulic jack hydraulic jack design
- The principle of a hydraulic jack
- Advantages and disadvantages of hydraulic jacks
- Classification of hydraulic jacks
- hydraulic jacks Jacks Hydraulic hybrids
- toe jacks
- Rombovye jacks
- Manufacturing hydraulic press
- Repair hydraulic jack
- The flow of oil
- Contact Air
Purpose hydraulic jack
Today you can not imagine carrying out repair work on the vehicle, whether repairssuspension or changing the wheel, without the use of ja
first mechanical jacks appeared in ancient times.And the idea of creating a special scheme of a hydraulic jack for the car, emerged inadvertently.Repairman Peter sleepwalk this idea spied in the barber shop, surprised at how easy hairstyle master records at a certain height hydraulic chair.In 1925 he was made a complex platform lift hydraulic rack for the car.
Hydraulic jacks are different carrying capacity that ranges from one to several hundred tons, which allows them to apply for the repair of trucks and other heavy equipment.
used as cargo hull or machinery Flooring slab foundation and pillars.Depending on the purpose of application, such equipment has a different size and design.
hydraulic jack used for moving, lifting and weight-fixing.The device is used in obscheslesarnyh and tire works, and is indispensable for carrying out the preparation of the machine for a long journey to create Balancing the wheel with the jack and removed using special equipment is balanced.
Modern hydraulic jacks are widely used not only at stations and car repair.They are successfully used in oil refineries, power plants and other industrial complexes.The highest level of performance and ease of operation have allowed this technology to introduce into domestic environment, so many owners in the garage has a hydraulic jack.
This equipment is able to operate in horizontal and vertical planes, so it is widely used in construction and assembly and test site for the tension reinforcement of prestressed concrete structures.
design hydraulic jack
main bearing elements are housing a hydraulic jack, hydraulic fluid, usually oil and pushes a piston.The hydraulic jack has a long or short body that is made of hardened steel.The body performs the following functions: serves to guide the piston cylinder and a reservoir for the working oil.
lifting screw is screwed into the fifth plunger, twisting the screw, so if you need to get to increase the maximum lift height.Ram is equipped with this type of hydraulic pump with hand, foot, or air driven.The device includes a hydraulic jack safety valves and other devices to create a long trouble-free operation.
lifting mechanism and retractable hydraulic cylinder, lifted up a special area, located in the housing bore.The descent takes place by turning the T-shaped handle.The equipment is made of polyamide wheel, the jack to ensure maneuverability.The body of the elongated shooting range is used mainly for use with buses and heavy trucks.
The principle of a hydraulic jack
Powered any hydraulic jack on the principle of communicating vessels using a liquid.Before the work is necessary to place the jack on a hard, flat surface under the car and hit the valve closed on the lever until the machine is raised to the required height.The descent of the car is carried out using a smooth opening of the valve device counterclockwise.
Pumped working hydraulic oil pump driven by a lever.The fluid enters the cylinder through the valve and squeezes it.Reverse flow of fluid will prevent the valve - discharge and suction.To lower the jack back, you must open the valve on the pump, then oil will flow from the cylinder back to the pump.
presence on the body of the jack the thread, which is protected by Dirt cover, thread on the rod and threaded holes in the base guarantees unlimited use and operation of hydraulic jacks for pressing, clamping and bending.High-pillar that is made of hardened steel and is mounted on the rod, can protect the hydraulic jack from damage.The corrugated surface of the support to prevent slipping goods.The force is controlled hydraulic jacks integrated pressure gauge.
Advantages and disadvantages of hydraulic jacks
Hydraulic Jacks are one of the most unpretentious, with all its power.An important feature is the hydraulic working incompressible material.Hence - the smooth lowering and lifting, fixing cargo at the correct height and braking precision.Hydraulic jacks demonstrate a high level of efficiency - up to 80% and significant carrying capacity - up to 200 tons with little effort due to the large gear ratio between the cross-sectional surface of the plunger and the pump cylinder.
But the initial hydraulic jacks lift height is much higher than the mechanical models.Another problem - the inability to accurately adjust the height lowering.To maintain operational jack must constantly monitor the level of oil control valves and seals for leaks.Transport and store these jacks can be in an upright position, as otherwise the liquid may leak from the tank.
Disadvantages of hydraulic jacks are derived from the merits.They are relatively slow - one cycle corresponds to the pump is not too high altitude climb.The disadvantages include a large mass and dimensions, the high price of a hydraulic jack, as well as a small move for odnoplunzhernyh models.Moreover, these tools often occur in more serious malfunction and breakage than mechanical devices.
Classification of hydraulic jacks
There are several varieties of hydraulic jacks.
Bottle hydraulic jacks
bottle design (vertical) of the hydraulic jack is very simple.Industry usage of these jacks is wide enough due to the large range of weight lifted - from 2 to 100 tons."Bottle" is used in the truck.In addition to the main advantages of a hydraulic jack, vertical models have a few more - this versatility, compactness and a large footprint.
There are bottle jacks and odnoshtokovymi dvushtokovymi.Hydraulic odnoshtokovy machine is simple structure and ease of operation that expands the field of use and allows you to perform work of any complexity: mounting and dismounting in mechanical engineering, construction, repair of motor vehicles, the wheels of railway cars, used as a power unit press bender, cutter and similar tools.
dvushtokovy telescopic jack has a similar design to the bottle unit, the operating principle of the hydraulic ram type of bottle is based on the use of several operating rods.The piston is at the basis of the telescopic jack.It can be applied in the horizontal and vertical positions.It is compact and fits most cars.Wake up is done by elevating the lever actuating the hydraulic cylinder.
Jacks Jacks works on a similar principle as the bottle, but with the difference that the axis of the working cylinder is not in the vertical axis, also the piston coincides directly with the pickup and lifting lever actuates.Podkatnye this unit named because it represents a cart on wheels that can roll on a flat surface.Jack when lifting the pickup arm and "rolled up" or shifting under load.
Such a jack driven by the same swing arm as the Bottle model, similarly falls - turning the valve screw.If necessary, lowering down is necessary to implant a tubular handle on the valve screw, and then enter the partition in the groove of the screw.By rotating the handle about its axis, and a screw member rotates correspondingly relieving the pressure in the working cylinder and lowering the load to the desired height.
most common Jacks can be found on the tire plant, because it is ideally suited to lift one side of the machine is fast enough to use and install.Deficiencies have a similar design are derived from the name - Jacks need to work hard, flat surface, concrete or asphalt.Furthermore, significant size and weight make it difficult transportation unit in the vehicle.
Jacks are classified by purpose, as in the photo of hydraulic jacks:
- For personal use, motorists, carrying up to 3 tons;
- for garages and tire shops, capacity of up to 4 tonnes, and the presence of pre-pedals for an instant lift to achieve the desired height of the pickup;
- For maintenance of heavy machinery and special vehicles (forklifts), carrying up to 20 tons and with the presence of pedals preliminary lifting and sliding yoke that is designed to raise one side of the machine.
Transmissonnye Jacks are equipped with a special swing frame.It manifests itself in all its glory smoothness and precision of hydraulic jacks.Transmission vehicle that is mounted or dismounted, can be accurately recorded in the horizontal or vertical in position.
Jacks duplex needed mainly in auto-service, staffed with different cars.The special features of this device include two lifting platforms.Drawing of hydraulic jack two-level on the whole is a hybrid paddock and bottle jack.And to be precise - a two-level jack is used at an altitude of 65 - 375 mm from the ground as the paddock and at an altitude of 375 - 687 mm as telescopic.When working with a lifting mechanism uses the hand lever and foot pedal.
Pneumohydraulic a jack combines hydraulics and pneumatics.It can be manufactured in podkatnye solution has a load range of 2 - 80 tonnes.The initial height of the pick-up - low.It is used exclusively as service equipment.
Nizkopodhvatnye the engagement jacks are widely used wherever low height of the pick-up is needed: for the installation and removal of various equipment for lifting cloth on the railroad and in the garages.It was such a low height of the pick-up that is 15 millimeters, with the ability to incrementally adjust it is the assembly mechanism is very convenient and serves hallmark toe jack.But at the heart of this jack is a simple device of bottle type.
hydraulic jack rombovy mainly required for the repair of lift trucks.It is characterized by high reliability, when compared with the relative of a screw, and ease of use, it is almost as good.
In rombovom jack as load-bearing elements are the four levers that are connected by hinges.Scheme of the hydraulic jack and lifting loads is based on the change in angle between the arms.The advantages rombovyh jacks ranked small dimensions, allowing easy storage, transport and with it a large bearing surface and rigidity.The relatively small height of the pickup.
Manufacturing hydraulic press
When the motorist alone serves its entire fleet, one of the most essential tools is the press.We invite you to make your own hands the press of a hydraulic jack, which will be a reliable ally in the performance of a list of works.With its help, you can punch holes in different materials, embed and insert bushings, pressed prompt scrap.
Assemble a hydraulic press is not too difficult.You will need to do the welding machine with the required amount of welding electrodes, hacksaw, angle grinder with the disc for metal, steel thick-walled profile design of the press to perform.Functions of the power unit, rendering the desired working pressure, carries a hydraulic jack.
first node acts as a hydraulic press ram support platform.Since the resulting pressure will be applied proportionally to the substrate and the upper work sites, the strength of the substrate must be maximized.To achieve this will, on the basis of making a few ribs.For manufacturing bases take a square or rectangular steel profile, which has a size of 40 by 50 or 50 by 50 millimeters and cut a length of about 4 parts 250-300 mm using the above tools.
must then put the side walls of these parts to each other and boil connecting seams at the top and bottom to increase the rigidity of the base of the press.In order to ensure greater stability of the hydraulic jack is welded to the resulting design of steel plate, sheet which has a thickness of 8 to 12 millimeters, and the size of 250 by 200 millimeters.
next stage of manufacture improvised press ram of a production stop and racks.To do this, cut off 2 pieces of the profiled thick-walled tube of rectangular or square shape desired length.To calculate it, it is required to clarify the attached instructions to the jack value of the maximum stroke, and to this we add the height of the size of the hydraulic jack and a support platform.
fabricate emphasis from the material that made the stand.The length of this part must be equal to the width of the support plate to keep the overall geometry of the structure.The emphasis and the resulting rack are connected by a weld and weld to the base of U-shaped design.
When performing such assembly operations is recommended to use a simple device that provides the squareness of the parts.On a steel sheet that has a thickness of not less than 10 millimeters, it is necessary to weld two trim angle steel 40 by 40 millimeters by 90 degrees.PARTS lay in the future in this device and cook.
So you can achieve the desired angle connection.