CN204342351U - Secondary reinforcement Manual hydraulic jack - Google Patents

Abstract

The utility model discloses a two-stage power-increasing manual hydraulic jack, which comprises a jacking part and a driving part. The jacking part includes a cylinder body and a piston. The plug, the lever handle that pushes the plunger to reciprocate in the pump body, and the fuel tank. The lower end of the lever handle is hinged with the seat part of the pump body. A toggle is provided between the plugs, one end of the toggle is hinged to the lever handle, and the other end of the toggle is hinged to the outer end of the plunger. The utility model solves the contradiction between the speed and the strength existing in the traditional hydraulic jack, the speed is high when no load is loaded, and the output force is large when the load is loaded. Compared with the traditional manual hydraulic jack, the work efficiency is obviously improved; Compared with the two-stage power-increasing manual hydraulic jack with rod structure, the driving part and the plunger have only three moving components, which simplifies the structure and can achieve a better force-increasing effect.

Description

Two-stage booster manual hydraulic jack

technical field

The utility model relates to a manual hydraulic jack with two-stage force boosting.

Background technique

As a general-purpose tool for lifting heavy objects, manual hydraulic jacks are widely used in various fields such as mechanical processing, construction, railways, automobile maintenance, and lifting transportation. It uses the liquid sealed in the oil cylinder as the medium, and converts the hydraulic energy into mechanical energy to lift the heavy object upwards.

The main technical problem of the commonly used traditional manual hydraulic jack is that the empty stroke and the loaded stroke are basically at the same speed, and the working conditions of no load and load cannot be distinguished. Moreover, the time for the traditional hydraulic jack to lift the heavy object without load is usually longer than the lifting time, the work efficiency is low, time-consuming and laborious, and the application range is narrow. Therefore, there is a contradiction between speed and strength in traditional manual hydraulic jacks. However, the manual hydraulic jack using the lever-hinge rod two-stage power-increasing mechanism has the advantages of high speed at no load and large output force at load, but it contains 5 moving components including the piston rod, which makes the overall structure of the jack complex. , The manufacturing process is cumbersome.

Utility model content

The technical problem to be solved by the utility model is: to overcome the deficiencies in the prior art, and provide a two-stage booster manual hydraulic jack with simple structure and better booster effect.

The technical solution adopted by the utility model to solve the technical problem is: a two-stage power-increasing manual hydraulic jack, including a jacking part and a driving part, and the jacking part includes a cylinder body and a piston that slides and cooperates with the inner wall of the cylinder body , the weight to be lifted is placed on the upper end of the piston, and the driving part includes a pump body, a plunger that slides with the inner wall of the pump, a lever handle that pushes the plunger to reciprocate in the pump body, and an oil tank. The lower end of the lever handle is connected to the pump The seat part of the body is hinged, and the oil cavity pipeline of the pump body is connected to the oil tank and the oil cavity of the cylinder body. A toggle is provided between the lever handle and the plunger, and one end of the toggle is hinged with the lever handle. The other end is hinged with the outer end of the plunger.

In order to control the entry and exit of hydraulic oil, an oil inlet check valve is arranged on the pipeline between the pump body and the oil tank, and an oil outlet check valve is arranged on the pipeline between the pump body and the cylinder body.

In order to control the hydraulic oil in the cylinder to return to the oil tank stably, an oil discharge valve is arranged between the pipeline leading to the cylinder from the pump body and the oil tank.

The beneficial effects of the utility model are: the utility model solves the contradiction between the speed and the strength existing in the traditional hydraulic jack, and can achieve high speed when no-load and large output force when loaded. Compared with the traditional manual hydraulic jack, The working efficiency is obviously improved; at the same time, compared with the two-stage power-increasing manual hydraulic jack with a lever-hinge rod structure, the driving part and the plunger have only three moving components, which simplifies the structure and can achieve a better force-increasing effect.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural representation of the utility model.

In the figure 1. Cylinder body 2. Piston 3. Weight 4. Pump body 5. Plunger 6. Lever handle 7. Fuel tank 8. Toggle lever 9. Oil inlet check valve 10. Oil outlet check valve 11. Oil discharge valve

Detailed ways

The utility model is described further in conjunction with accompanying drawing now. These drawings are simplified schematic diagrams only to illustrate the basic structure of the utility model in a schematic way, so they only show the configurations related to the utility model.

A two-stage booster manual hydraulic jack as shown in Figure 1 includes a jacking part and a driving part. The upper part moves up and down, and the weight 3 to be lifted is placed on the upper end of the piston 2.

The drive unit includes a pump body 4, a plunger 5, a lever handle 6 that pushes the plunger 5 to reciprocate in the pump body 4, and an oil tank 7. The plunger 5 is slidingly fitted with the inner wall of the pump body 4, and the lower end of the lever handle 6 is in contact with the pump body. The seat part of the body 4 is hinged, the oil chamber pipeline of the pump body 4 connects the oil tank 7 and the oil chamber of the cylinder body 1, and an oil inlet check valve 9 is arranged on the pipeline between the pump body 4 and the oil tank 7, The pipeline between the pump body 4 and the cylinder body 1 is provided with an oil outlet check valve 10 to control the entry and exit of hydraulic oil, and there is also a discharge valve between the pipeline from the pump body 4 to the cylinder body 1 and the oil tank 7. The oil valve 11 adjusts the angle of the oil discharge valve 11 so that the hydraulic oil can be stably returned to the oil tank 7 when the piston 2 returns.

A toggle 8 is provided between the lever handle 6 and the plunger 5, one end of the toggle 8 is hinged to the lever handle 6, the other end of the toggle 8 is hinged to the outer end of the plunger 5, and the lever handle 6 and the toggle 8 constitute The driving part pushes the booster mechanism of the piston 2 up and down. Through the repeated upward and downward pressure of the lever handle 6, the plunger 5 reciprocates in the pump body 4, and the piston 2 is driven up and down by the pipeline to lift the heavy object 3. .

During operation, when the lever handle 6 is pressed down, the toggle lever 8 hinged on it drives the plunger 5 to move to the right, and when the sealed volume of the oil chamber in the pump body 4 increases to form a partial vacuum, the oil inlet check valve 9 Open, the hydraulic oil in the oil tank 7 enters the oil cavity of the pump body 4 through the pipeline under the action of atmospheric pressure, and completes an oil suction action; when the lever handle 6 is lifted upwards, the toggle lever 8 hinged on it push The plunger 5 moves to the left, so that the sealing volume of the oil cavity in the pump body 4 decreases, the oil pressure rises, the oil inlet check valve 9 is closed, the oil outlet check valve 10 is opened, and the hydraulic oil enters the cylinder 1 with oil In the chamber, the piston 2 is driven to lift the weight 3 for a certain distance to complete an oil pressure action.

At the moment of completing the oil pressure action, continue to lift the lever handle 6 upwards, the toggle lever 8 drives the plunger 5 to move to the right, and completes another oil suction action. When the lever handle 6 is pushed downward again, the toggle lever 8 pushes the plunger 5 moves to the left, and completes another oil pressure action. Repeatedly lifting and pressing the lever handle 6 in this way, the hydraulic oil can be continuously pressed into the cylinder body 1, and the weight 3 can be continuously raised, so as to achieve lifting The purpose; if it is necessary to drain oil, the oil drain valve 11 is rotated 90°, and the piston 2 realizes the return stroke under the action of its own weight and external force.

The utility model adopts the combined structure of the lever-toggle rod, which solves the contradiction between the speed and the force in the traditional hydraulic jack, and can achieve high speed when no load and large output force when loaded, which is comparable to the traditional manual hydraulic jack. Compared with the two-stage booster manual hydraulic jack with lever-hinge rod structure, the driving part, including the plunger 5, has only three moving components, the overall structure of the jack is simplified, and can Play a better boost effect.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model. Equivalent changes or modifications made by the spirit of the present utility model shall be covered within the protection scope of the present utility model.

Claims (3)

1. a secondary reinforcement Manual hydraulic jack, comprise jacking portion and drive division, described jacking portion comprises cylinder body (1), with the piston (2) of cylinder body (1) inwall bearing fit, treat that the weight (3) of jacking is placed in piston (2) upper surface, it is characterized in that: described drive division comprises the pump housing (4), with the plunger (5) of the pump housing (4) inwall bearing fit, promote plunger (5) reciprocating lever handle (6) and fuel tank (7) in the pump housing (4), the pedestal part of lever handle (6) lower end and the pump housing (4) is hinged, the pump housing (4) have oil pocket pipeline connect fuel tank (7) and cylinder body (1) have oil pocket, toggle link (8) is provided with between described lever handle (6) and plunger (5), toggle link (8) one end and lever handle (6) hinged, toggle link (8) other end and plunger (5) outer end hinged.

2. secondary reinforcement Manual hydraulic jack according to claim 1, it is characterized in that: the pipeline between the described pump housing (4) and fuel tank (7) is provided with in line check valve (9), and the pipeline between the pump housing (4) and cylinder body (1) is provided with oil outlet one-way valve (10).

3. secondary reinforcement Manual hydraulic jack according to claim 1, is characterized in that: the described pump housing (4) leads between the pipeline of cylinder body (1) and fuel tank (7) and is provided with oil cock (11).