Dual power jack

Abstract

The utility model discloses a double -power jack, including cylinder, be equipped with piston rod in the cylinder, the piston rod is relative the cylinder sliding, the piston rod is equipped with hydraulic module in the cylinder, be equipped with first input jar and second input jar on the hydraulic module, first input jar with second input jar all are established on the cylinder, be equipped with lever structure on the cylinder, lever structure with first input jar is connected, be equipped with crank connecting rod structure on the cylinder, crank connecting rod structure with second input jar is connected. The utility model discloses a purpose is to solve the shortcoming that only single drive mode of hydraulic jack in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of jack technology, and in particular to a dual-power jack. Background Technology

[0002] A jack is a small, lightweight lifting device that uses a rigid lifting component as its working device to lift heavy objects within a short stroke via a top support or bottom claw. Jacks are mainly used in factories, mines, and transportation sectors for vehicle repair and other lifting and support work. Hydraulic jacks, in particular, work by using hydraulic fluid as the working medium, transmitting motion through changes in sealed volume, and transmitting power through the internal pressure of the fluid. A hydraulic transmission device is essentially an energy conversion device. Currently, hydraulic jacks all use a lever structure at the drive end. The operator repeatedly drives the lever, causing changes in the pressure of the hydraulic cylinder inside the jack, which in turn drives the piston rod to extend, achieving the lifting function.

[0003] In the use of existing technology, only the lever structure drives the jack. This can effectively save labor costs when the jack has a short stroke. However, when the jack has a long stroke, the operator needs to drive the lever back and forth more often, which can easily cause back and waist strain. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing hydraulic jacks, which only have a single driving method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dual-power jack includes a cylinder body, a piston rod disposed within the cylinder body, the piston rod sliding relative to the cylinder body, a hydraulic module disposed within the cylinder body and the piston rod, a first input cylinder and a second input cylinder disposed on the hydraulic module, both the first input cylinder and the second input cylinder being disposed on the cylinder body, a lever structure disposed on the cylinder body and connected to the first input cylinder, and a crank-connecting rod structure disposed on the cylinder body and connected to the second input cylinder.

[0007] Preferably, the hydraulic module includes a drive cylinder, which is slidably connected to the piston rod. The drive cylinder is located inside the cylinder body, and an oil reservoir is provided inside the cylinder body. The oil reservoir is sleeved on the drive cylinder and is located inside the cylinder body. A first oil pipe is provided on the oil reservoir, and the first oil pipe is connected to both the first input cylinder and the second input cylinder. A second oil pipe is provided on the drive cylinder, and the second oil pipe is connected to both the first input cylinder and the second input cylinder.

[0008] Preferably, the hydraulic module further includes a third oil pipe that connects the oil reservoir to the drive cylinder, and the third oil pipe is equipped with a pressure relief valve.

[0009] Preferably, both the first oil pipe and the second oil pipe are equipped with a one-way valve.

[0010] Preferably, the lever structure includes a first pressure plug, which is slidably connected to the first input cylinder. The first input cylinder is provided with a first connecting rod, which is hinged to the cylinder body. A second connecting rod is hinged to the first connecting rod, which is hinged to the first pressure plug. The second connecting rod is provided with a handle.

[0011] Preferably, the crank-connecting rod structure includes a mounting bracket, a rotating shaft on the mounting bracket, a bearing between the rotating shaft and the mounting bracket, a crank sleeved on the rotating shaft, a first connecting rod hinged to the crank, a second connecting rod hinged to the first connecting rod, the second connecting rod being slidably connected to the mounting bracket, a third connecting rod hinged to the second connecting rod, the third connecting rod being hinged to the second input cylinder, a second pressure plug inside the second input cylinder, the second pressure plug being hinged to the third connecting rod, and a handle on the rotating shaft.

[0012] Preferably, the cylinder body is further provided with a bracket, the bracket is provided with a threaded rod, the threaded rod slides relative to the bracket, and the threaded rod is threadedly connected to the piston rod.

[0013] The beneficial effects proposed by this utility model are as follows:

[0014] The first input cylinder drives the hydraulic module through the lever structure to change the pressure inside the cylinder, causing the piston rod to extend. The lever structure is used for short-stroke lifting of the piston rod, requiring only a few repetitions from the operator to extend it. When a longer lifting stroke is required, the operator drives the crank-connecting rod structure. Unlike the lever structure, which involves repeated pressing, potentially causing muscle strain in the operator's back during long strokes, the crank-connecting rod structure converts rotation into linear motion. This increases the hydraulic module's operating speed and efficiency, improving piston rod efficiency during long strokes and reducing muscle strain and physical burden on the operator.

[0015] Furthermore, in the above process, during shorter stroke operations, the piston rod requires only a few strokes to extend, the crank-connecting rod structure requires multiple rotations to complete the displacement, while the lever structure only requires a few presses. Therefore, when the piston rod extends during a shorter stroke, the lever structure is more efficient than the crank-connecting rod structure. Therefore, incorporating both the lever structure and the crank-connecting rod structure on the cylinder block facilitates switching between the drive system and the jack's operating states. Attached Figure Description

[0016] Figure 1 This is a perspective view of a dual-power jack proposed in this utility model;

[0017] Figure 2 This invention provides a structural schematic diagram of a liquid module for a dual-power jack. Figure 1 ;

[0018] Figure 3 This invention provides a structural schematic diagram of a liquid module for a dual-power jack. Figure 1 A magnified view of a portion of the image;

[0019] Figure 4 This invention provides a structural schematic diagram of a liquid module for a dual-power jack. Figure 2 ;

[0020] Figure 5 This invention provides a structural schematic diagram of a liquid module for a dual-power jack. Figure 2 Enlarged view of part B;

[0021] Figure 6 This is a schematic diagram of the lever structure of a dual-power jack proposed in this utility model;

[0022] Figure 7 This is a schematic diagram of the crank-connecting rod structure of a dual-power jack proposed in this utility model.

[0023] In the diagram: 1. Cylinder body; 2. Piston rod; 3. First input cylinder; 4. Second input cylinder; 5. Drive cylinder; 6. Oil reservoir; 7. First oil pipe; 8. Second oil pipe; 9. Third oil pipe; 10. Pressure relief valve; 11. Check valve; 12. First plug; 13. First connecting rod; 14. Second connecting rod; 15. Handle; 16. Second plug; 17. Mounting bracket; 18. Shaft; 19. Bearing; 20. Crank; 21. First connecting rod; 22. Second connecting rod; 23. Third connecting rod; 24. Fourth connecting rod; 25. Crank handle; 26. First valve body; 27. First ball bearing; 28. First spring; 29. ​​Drive shaft; 30. Second valve body; 31. Second ball bearing; 32. Second spring; 33. First sealing ring; 34. Second sealing ring; 35. Bracket; 36. Threaded rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figures 1 to 7A dual-power jack includes a cylinder body 1, within which a piston rod 2 is disposed. The piston rod 2 slides relative to the cylinder body 1. A hydraulic module is disposed within the cylinder body 1 and the piston rod 2. The hydraulic module has a first input cylinder 3 and a second input cylinder 4, both mounted on the cylinder body 1. A lever structure is provided on the cylinder body 1, connected to the first input cylinder 3. A crank-connecting rod structure is also provided on the cylinder body 1, connected to the second input cylinder 4. Specifically, the first input cylinder 3 drives the hydraulic module through the lever structure to change the pressure inside the cylinder body 1, causing the piston rod 2 to extend. The lever structure is used for short-stroke lifting of the piston rod 2, allowing the operator to extend the piston rod 2 with only a few repeated drives of the lever structure. When the piston rod 2 requires a long lifting stroke, the operator drives the crank 20 connecting rod structure. Unlike the lever structure, which involves repeated pressing during the piston rod 2's long stroke, the crank 20 connecting rod structure drives the hydraulic module by converting rotational motion into linear motion. This increases the hydraulic module's operating speed and driving efficiency, improving the piston rod 2's efficiency during long stroke operations. Furthermore, it helps reduce muscle strain on the operator and lessens the physical burden of work.

[0026] Furthermore, in the above process, during the shorter stroke operation, the piston rod 2 requires only a few strokes to extend, the crank 20 connecting rod structure requires multiple rotations to complete the displacement, while the lever structure only requires a few presses. Therefore, when the piston rod 2 extends during a shorter stroke, the lever structure is more efficient than the crank 20 connecting rod structure. Therefore, providing both the lever structure and the crank 20 connecting rod structure on the cylinder body 1 facilitates switching between the drive system and the jack's operating states.

[0027] Specifically, the hydraulic module includes a drive cylinder 5, which is slidably connected to the piston rod 2. The drive cylinder 5 is located inside the cylinder body 1, and the cylinder body 1 is provided with an oil storage tank 6. The oil storage tank 6 is sleeved on the drive cylinder 5 and is located inside the cylinder body 1. The oil storage tank 6 is provided with a first oil pipe 7, which is connected to both the first input cylinder 3 and the second input cylinder 4. The drive cylinder 5 is provided with a second oil pipe 8, which is connected to both the first input cylinder 3 and the second input cylinder 4. Both the drive cylinder 5 and the oil reservoir 6 are filled with hydraulic oil. Taking the lever structure as an example, when the lever structure is repeatedly pressed, the first input cylinder 3 is pressurized. At this time, the hydraulic oil in the oil reservoir 6 is injected into the first input cylinder 3 through the first oil pipe 7, and then into the second oil pipe 8 through the first input cylinder 3. Finally, the hydraulic oil is injected into the drive cylinder 5 through the second oil pipe 8, so that the drive cylinder 5 is continuously filled with hydraulic oil. Simultaneously, the piston rod 2 is driven to rise by the hydraulic oil. Similarly, when the crank 20 connecting rod structure is driven, the second input cylinder 4 is pressurized. At this time, the hydraulic oil in the oil reservoir 6 is injected into the first input cylinder 3 through the first oil pipe 7, and then into the second oil pipe 8 through the first input cylinder 3. Finally, the hydraulic oil is injected into the drive cylinder 5 through the second oil pipe 8, so that the drive cylinder 5 is continuously filled with hydraulic oil. Simultaneously, the piston rod 2 is driven to rise by the hydraulic oil. The piston rod 2 is extended by utilizing hydraulic principles and through the lever structure and the crank 20 connecting rod structure.

[0028] Specifically, the hydraulic module also includes a third oil pipe 9, which connects the oil reservoir 6 to the drive cylinder 5. A pressure relief valve 10 is installed within the third oil pipe 9. When the piston rod 2 retracts and resets, the pressure relief valve 10 opens, opening the oil passage between the drive cylinder 5 and the oil reservoir 6, i.e., connecting the third oil pipe 9. Hydraulic oil flows back from the drive cylinder 5 to the oil reservoir 6 through the third oil pipe 9. At this time, the hydraulic oil in the drive cylinder 5 decreases, and the piston rod 2 gradually retracts and moves downwards. This achieves the retraction and reset of the piston rod 2. The pressure relief valve 10 includes a second valve body 30 and a drive shaft 29. The drive shaft 29 is threadedly connected to the third oil pipe 9. The second valve body 30 is located inside the third oil pipe 9. The second valve body 30 is provided with a second ball 31 and a second spring 32. When the pressure relief valve 10 is activated, the operator rotates the drive shaft 29, causing the drive shaft 29 to move linearly inside the third oil pipe 9 and push the second ball 31 to move inside the second valve body 30. At this time, the hydraulic oil in the third oil pipe 9 can flow from the drive cylinder 5 to the oil reservoir 6. Conversely, when the pressure relief valve 10 is closed, the drive shaft 29 is rotated in reverse, and the thrust on the second ball 31 is released. At this time, the second ball 31 receives the elastic force stored when the second spring 32 is compressed, causing the second ball 31 to block the second valve body 30 and close the third oil pipe 9, thereby realizing the rapid reset of the piston rod 2.

[0029] Specifically, both the first oil pipe 7 and the second oil pipe 8 are equipped with a one-way valve 11. The one-way valve 11 is used to reduce the risk of backflow of hydraulic oil in the first oil pipe 7 and the second oil pipe 8, which helps to improve the oil circuit flow efficiency and improve the utilization efficiency of the lever structure and the crank 20 connecting rod structure. The one-way valve 11 includes a first valve body 26, which is evenly distributed within the first oil pipe 7 and the second oil pipe 8. The first valve body 26 contains a first ball bearing 27 and a first spring 28. When hydraulic oil flows from the first input cylinder 3 or the second input cylinder 4 to the drive cylinder 5, the hydraulic oil is injected into the first valve body 26. This hydraulic oil pushes the first ball bearing 27 to compress the first spring 28. At this time, the hydraulic oil can flow through the first valve body 26 within the first oil pipe 7 or the second oil pipe 8. When the first input cylinder 3 or the second input cylinder 4 stops flowing hydraulic oil into the drive cylinder 5, the first spring 28 releases its stored elastic force, pushing the first ball bearing 27 in the opposite direction and blocking the input end of the first valve body 26. This allows the hydraulic oil in the drive cylinder 5 to flow backward through the first oil pipe 7 or the second oil pipe 8 back into the first input cylinder 3 or the second input cylinder 4, reducing the risk of hydraulic oil backflow and further improving the working accuracy and stability of the piston rod 2.

[0030] Specifically, the lever structure includes a first pressure plug 12, which is slidably connected to the first input cylinder 3. The first input cylinder 3 is provided with a first connecting rod 13, which is hinged to the cylinder body 1. A second connecting rod 14 is hinged to the first connecting rod 13, and the second connecting rod 14 is hinged to the first pressure plug 12. A handle 15 is provided on the second connecting rod 14. When the lever structure is in operation, the operator manipulates the handle 15 to swing, causing the handle 15 to drive the first pressure plug 12 to continuously move up and down repeatedly within the first input cylinder 3. At this time, the hydraulic oil in the first input cylinder 3 is drawn out from the first oil pipe 7 and then pressed out through the second oil pipe 8. With the handle 15 hinged to the first connecting rod 13 and the second connecting rod 14, a lever-type hydraulic oil is quickly driven from the oil reservoir 6 into the drive cylinder 5, which helps improve the efficiency during the short stroke of the piston rod 2.

[0031] Specifically, the crank 20 connecting rod structure includes a mounting bracket 17, a rotating shaft 18 on the mounting bracket 17, a bearing 19 between the rotating shaft 18 and the mounting bracket 17, a crank 20 sleeved on the rotating shaft 18, a first connecting rod 21 hinged to the crank 20, a second connecting rod 22 hinged to the first connecting rod 21, the second connecting rod 22 being slidably connected to the mounting bracket 17, a third connecting rod 23 hinged to the second connecting rod 22, the third connecting rod 23 being hinged to the second input cylinder 4, a second pressure plug 16 inside the second input cylinder 4, a fourth connecting rod 24 hinged to the second pressure plug 16, the fourth connecting rod 24 being hinged to the cylinder body 1, and a crank handle 25 on the rotating shaft 18. When the crank 20 connecting rod structure is in operation, the operator applies a thrust to the crank handle 25, which drives the rotating shaft 18 to rotate. Simultaneously, the rotating shaft 18 drives the crank 20 to rotate. Since the first connecting rod 21 is hinged to both the crank 20 and the second connecting rod 22, when the crank 20 rotates, the second connecting rod 22 slides relative to the mounting bracket 17, and the second connecting rod 22 performs a reciprocating linear movement. Furthermore, the reciprocating linear movement of the second connecting rod 22 exerts a lifting and pressing action on the third connecting rod 23, and with the aid of… The function of the fourth link 24 is to allow the third link 23 to transmit this power to the second pressure plug 16, enabling the second pressure plug 16 to repeatedly rise and slide within the second input cylinder 4. This increases the speed of the reciprocating linear motion of the second link 22, saving labor costs for operators. It also makes the reciprocating motion speed of the second pressure plug 16 faster than that of the first pressure plug 12, which facilitates the rapid flow of hydraulic oil from the oil reservoir 6 into the drive cylinder 5. This results in a rapid increase in the thrust received by the piston rod 2, which is beneficial for the rapid extension of the piston rod 2 during long-stroke movement.

[0032] Furthermore, a first sealing ring 33 is fitted on the piston rod 2. The first sealing ring 33 is used to reduce the risk of hydraulic oil leakage from the drive cylinder 5 during the movement of the piston rod 2. Simultaneously, a second sealing ring 34 is fitted on both the first pressure plug 12 and the second pressure plug 16. The second sealing ring 34 has the same function as the first sealing ring 33, which is to reduce the risk of hydraulic oil leakage from the cylinder.

[0033] Specifically, the cylinder body 1 is also equipped with a bracket 35, and the bracket 35 is equipped with a threaded rod 36. The threaded rod 36 slides relative to the bracket 35 and is threadedly connected to the piston rod 2. To improve the lifting accuracy of the piston rod 2, the threaded rod 36 can be threadedly connected to the piston rod 2. When the piston rod 2 reaches the target height, the threaded rod 36 is rotated, causing it to extend beyond the piston rod 2, thereby increasing the accuracy of the piston rod 2 lifting operation with a smaller displacement. Furthermore, the extension of the threaded rod 36 increases the length of the piston rod 2, enabling the jack to be used for lifting operations of components at higher heights. Since the threaded rod 36 is relatively long, in order to improve the support stability of the threaded rod 36, a bracket 35 can be added to the cylinder body 1. The bracket 35 is slidably connected to the threaded rod 36. The bracket 35 causes the support point of the threaded rod 36 to move upward from the piston rod 2, thereby increasing the stability and strength of the threaded rod 36 during the lifting process.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dual-power jack, comprising a cylinder body, characterized in that: The cylinder body is provided with a piston rod, which slides relative to the cylinder body. The piston rod and the cylinder body are provided with a hydraulic module. The hydraulic module is provided with a first input cylinder and a second input cylinder. The first input cylinder and the second input cylinder are both located on the cylinder body. The cylinder body is provided with a lever structure, which is connected to the first input cylinder. The cylinder body is provided with a crank-connecting rod structure, which is connected to the second input cylinder.

2. The dual-power jack according to claim 1, characterized in that: The hydraulic module includes a drive cylinder, which is slidably connected to the piston rod. The drive cylinder is located inside the cylinder body, and an oil reservoir is provided inside the cylinder body. The oil reservoir is sleeved on the drive cylinder and is located inside the cylinder body. A first oil pipe is provided on the oil reservoir, and the first oil pipe is connected to both the first input cylinder and the second input cylinder. A second oil pipe is provided on the drive cylinder, and the second oil pipe is connected to both the first input cylinder and the second input cylinder.

3. The dual-power jack according to claim 2, characterized in that: The hydraulic module also includes a third oil pipe that connects the oil reservoir to the drive cylinder, and a pressure relief valve is provided inside the third oil pipe.

4. The dual-power jack according to claim 3, characterized in that: Both the first oil pipe and the second oil pipe are equipped with one-way valves.

5. A dual-power jack according to claim 4, characterized in that: The lever structure includes a first pressure plug, which is slidably connected to the first input cylinder. The first input cylinder is provided with a first connecting rod, which is hinged to the cylinder body. A second connecting rod is hinged to the first connecting rod, which is hinged to the first pressure plug. The second connecting rod is provided with a handle.

6. The dual-power jack according to claim 5, characterized in that: The crank-connecting rod structure includes a mounting bracket, a rotating shaft on the mounting bracket, a bearing between the rotating shaft and the mounting bracket, a crank sleeved on the rotating shaft, a first connecting rod hinged to the crank, a second connecting rod hinged to the first connecting rod, the second connecting rod being slidably connected to the mounting bracket, a third connecting rod hinged to the second connecting rod, the third connecting rod being hinged to the second input cylinder, a second pressure plug inside the second input cylinder, the second pressure plug being hinged to the third connecting rod, and a handle on the rotating shaft.

7. A dual-power jack according to claim 6, characterized in that: The cylinder body is also provided with a bracket, and the bracket is provided with a threaded rod. The threaded rod slides relative to the bracket and is threadedly connected to the piston rod.

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