Multi-stage buffer mechanism for oil cylinder

Abstract

The utility model belongs to the field of oil cylinder especially is concerned about a kind of multistage buffer mechanism for oil cylinder, including cylinder body, the inside sliding sleeve of cylinder body is equipped with piston rod, the side fixed mounting of cylinder body has multistage buffer assembly, the inside of cylinder body is provided with last stage buffer assembly, last stage buffer assembly is used in cooperation with piston rod, multistage buffer assembly includes fixed block, the side fixed mounting of cylinder body;The application can be when impact force is too large, the sliding of bung in the inside of recess, make parting oil port and cylinder body inner cavity communicate and discharge part of hydraulic oil, to reach the effect of buffering;According to the size of impact force, so that several parting oil ports and cylinder body inner cavity communicate, to reach the effect of multistage buffering, reduce the risk of oil cylinder damage;The piston rod is buffered by last stage buffer assembly, to effectively reduce the risk of damage of piston rod under impact force.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinders, specifically a multi-stage buffer mechanism for hydraulic cylinders. Background Technology

[0002] A hydraulic cylinder is an actuator in a hydraulic system that enables linear reciprocating motion or oscillating motion. It converts hydraulic energy into mechanical energy through changes in sealed volume. Its core consists of a cylinder body, piston, piston rod, and sealing device. During operation, hydraulic oil enters the cylinder chamber to drive the piston to move, thereby driving the load to complete actions such as extension, retraction, and lifting. It is widely used in engineering machinery, industrial equipment, and aerospace fields.

[0003] In existing hydraulic cylinders, under high-speed or heavy-load conditions, the cylinders cannot effectively absorb all kinetic energy, resulting in residual energy causing impact. This not only affects the service life of the hydraulic cylinder, but may also cause it to burst and break in severe cases. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a multi-stage buffer mechanism for hydraulic cylinders to solve the above-mentioned technical problems existing in the prior art.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A multi-stage buffer mechanism for a hydraulic cylinder includes a cylinder body, a piston rod slidably sleeved inside the cylinder body, a multi-stage buffer assembly fixedly installed on one side of the cylinder body, and a final-stage buffer assembly disposed inside the cylinder body, the final-stage buffer assembly cooperating with the piston rod. The multi-stage buffer assembly includes a fixing block, which is fixedly installed on one side of the cylinder body. The fixing block has a groove inside, which is connected to the inner cavity of the cylinder body. A first spring is installed in the groove, and a block is fixedly connected to one end of the first spring. Several oil distribution ports are installed inside the groove. An oil outlet is installed at the bottom of the cylinder body, and the oil distribution ports are connected to the oil outlet. An oil inlet is fixedly connected to the top of the fixing block, and the oil inlet is connected to the groove.

[0006] Preferably, a support rod is fixedly connected inside the groove, the first spring is slidably sleeved on the surface of the support rod, and one end of the support rod passes through the block and is slidably connected to the inner cavity of the block.

[0007] Preferably, a first limiting block is fixed on the surface of the block, and a first limiting groove is formed on the inner wall of the groove, with the first limiting block slidably connected inside the first limiting groove.

[0008] Preferably, the final stage buffer assembly includes a base frame, which is fixedly installed inside the cylinder body. A second spring is provided inside the base frame, and one end of the second spring is fixedly connected to a top plate. The top plate is used in conjunction with the piston rod.

[0009] Preferably, the surface of the base frame has a plurality of first openings, and the surface of the top plate has a plurality of second openings.

[0010] Preferably, a positioning sleeve is fixedly installed inside the base frame, and a positioning rod is fixedly connected to the bottom of the top plate. One end of the positioning rod is slidably connected inside the positioning sleeve, and the positioning rod and the positioning sleeve are slidably connected to the inner cavity of the second spring.

[0011] Preferably, a second limiting block is fixedly provided on the inner wall of the positioning sleeve, and a second limiting groove is provided on the surface of the positioning rod, with the second limiting groove and the second limiting block being slidably connected.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, by setting up a multi-stage buffer assembly, allows the block to slide inside the groove when the impact force is too large, connecting the oil distributor port to the inner cavity of the cylinder, thereby discharging some hydraulic oil and achieving a buffering effect. Depending on the magnitude of the impact force, several oil distributor ports are connected to the inner cavity of the cylinder to achieve a multi-stage buffering effect, reducing the risk of cylinder damage. The final stage buffer assembly buffers the piston rod, effectively reducing the risk of piston rod damage under impact force. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the multi-stage buffer mechanism for the hydraulic cylinder of this utility model. Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the multi-level buffer component structure of this utility model; Figure 4 This is a schematic diagram of the final stage buffer assembly of this utility model.

[0014] In the diagram: 1. Cylinder block; 101. Piston rod; 2. Multi-stage buffer assembly; 21. Fixing block; 2101. Oil inlet; 22. Groove; 23. First spring; 24. Plug; 25. Oil distributor; 26. Oil outlet; 27. Support rod; 28. First limiting block; 29. ​​First limiting groove; 3. Final stage buffer assembly; 31. Base frame; 3101. First opening; 32. Second spring; 33. Top plate; 3301. Second opening; 34. Positioning sleeve; 3401. Second limiting block; 3402. Second limiting groove; 35. Positioning rod. Detailed Implementation

[0015] The technical solution of this utility model will be further described in a non-limiting manner below with reference to the accompanying drawings and specific embodiments.

[0016] like Figures 1-3 The multi-stage buffer mechanism for a hydraulic cylinder shown includes a cylinder body 1, a piston rod 101 is slidably sleeved inside the cylinder body 1, a multi-stage buffer assembly 2 is fixedly installed on one side of the cylinder body 1, and a final-stage buffer assembly 3 is provided inside the cylinder body 1 to cooperate with the piston rod 101. The multi-stage buffer assembly 2 includes a fixing block 21, which is fixedly installed on one side of the cylinder body 1. The fixing block 21 has a groove 22 that communicates with the inner cavity of the cylinder body 1. A first spring 23 is installed in the groove 22. One end of the first spring 23 is fixedly connected to a block 24. The groove 22 has several oil distribution ports 25. The bottom of the cylinder body 1 has an oil outlet 26 that communicates with the oil distribution ports 25. The top of the fixing block 21 is fixedly connected to an oil inlet 2101 that communicates with the groove 22. The oil pressure inside the groove 22 is lower than the oil pressure inside the cylinder body 1.

[0017] When the impact force is too large, the plug 24 slides inside the groove 22, connecting the oil distribution port 25 with the inner cavity of the cylinder 1, thereby sending some hydraulic oil from the oil distribution port 25 to the oil outlet 26 and then discharging it to achieve a buffering effect. When the pressure weakens, the hydraulic oil supplied by the first spring 23 and the oil inlet 2101 resets the plug 24, allowing the plug 24 to re-seal the oil distribution port 25, thus avoiding affecting the normal use of the cylinder 1 and the piston rod 101. Depending on the magnitude of the impact force, several oil distribution ports 25 are connected to the inner cavity of the cylinder 1 to achieve a multi-stage buffering effect, effectively reducing the risk of cylinder damage. The final stage buffer assembly 3 can buffer the piston rod 101 to effectively reduce the risk of damage to the piston rod 101 under impact force.

[0018] like Figure 3 As shown, a support rod 27 is fixedly connected inside the groove 22. A first spring 23 is slidably sleeved on the outside of the support rod 27. One end of the support rod 27 passes through the block 24 and is slidably connected to the block 24. The slidable sleeve of the first spring 23 on the outside of the support rod 27 can effectively stabilize the position of the first spring 23, so that the first spring 23 can effectively support the block 24.

[0019] like Figure 3 As shown, a first limiting block 28 is fixedly provided on the surface of the block 24, and a first limiting groove 29 is provided on the inner wall of the groove 22. The first limiting block 28 is slidably connected in the first limiting groove 29, which can effectively stabilize the position of the block 24.

[0020] like Figure 2 and Figure 4As shown, the final stage buffer assembly 3 includes a base frame 31, which is fixedly installed inside the cylinder body 1. A second spring 32 is provided inside the base frame 31, and one end of the second spring 32 is fixedly connected to a top plate 33 that cooperates with the piston rod 101. The surface of the base frame 31 has several first openings 3101, and the surface of the top plate 33 has several second openings 3301. The first openings 3101 and the second openings 3301 can avoid affecting the flow of hydraulic oil inside the cylinder body 1. The position of the top plate 33 is supported by the second spring 32. When the piston rod 101 contacts the top plate 33, the second spring 32 buffers the piston rod 101 through the top plate 33 to reduce the risk of damage to the piston rod 101 under impact force.

[0021] like Figure 4 As shown, a positioning sleeve 34 is fixedly installed inside the base frame 31, and a positioning rod 35 is fixedly connected to the bottom of the top plate 33. One end of the positioning rod 35 is slidably connected inside the positioning sleeve 34. The positioning rod 35 and the positioning sleeve 34 are located inside the second spring 32. A second limiting block 3401 is fixedly installed on the inner wall of the positioning sleeve 34, and a second limiting groove 3402 is opened on the surface of the positioning rod 35. The second limiting block 3401 is slidably installed in the second limiting groove 3402. The slidable connection of one end of the positioning rod 35 inside the positioning sleeve 34 can stabilize the position of the top plate 33 through the positioning sleeve 34 and the positioning rod 35, preventing the top plate 33 from tilting or shifting. The second limiting block 3401 and the second limiting groove 3402 can prevent the positioning rod 35 from separating from the positioning sleeve 34, ensuring the stability of the position of the top plate 33.

[0022] Working principle: When the impact force is too large, the plug 24 slides inside the groove 22, making the oil distribution port 25 connected to the inner cavity of the cylinder 1. This allows some hydraulic oil to be sent from the oil distribution port 25 to the oil outlet 26 and then discharged, achieving a buffering effect. When the pressure decreases, the support rod 27 stabilizes the position of the first spring 23, causing the first spring 23 and the hydraulic oil supplied by the oil inlet 2101 to reset the plug 24. The first limiting block 28 and the first limiting groove 29 further stabilize the plug 24 during reset, ensuring that the plug 24 re-seals the oil distribution port 25, preventing any impact on the normal operation of the cylinder 1 and piston rod 101. Depending on the magnitude of the impact force, several oil distribution ports 25 are connected to the cylinder... 1. The internal cavity is interconnected, achieving a multi-stage buffering effect and effectively reducing the risk of cylinder damage; the position of the top plate 33 is supported by the second spring 32. When the piston rod 101 contacts the top plate 33, the position of the positioning rod 35 inside the positioning sleeve 34 is stabilized by the second limiting block 3401 and the second limiting groove 3402, preventing the positioning rod 35 from separating from the positioning sleeve 34. This stabilizes the position of the top plate 33, allowing the second spring 32 to buffer the piston rod 101 through the top plate 33. Furthermore, the flow of hydraulic oil is not affected by the first opening 3101 and the second opening 3301, effectively reducing the risk of piston rod 101 being damaged under impact.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model; all such changes and modifications will fall within the scope of the claimed utility model.

Claims

1. A multi-stage buffer mechanism for a hydraulic cylinder, characterized in that: Includes a cylinder body (1), inside which a piston rod (101) is slidably sleeved, and a multi-stage buffer assembly (2) is fixedly installed on one side of the cylinder body (1), and inside the cylinder body (1) is a final-stage buffer assembly (3) that works in conjunction with the piston rod (101). The multi-stage buffer assembly (2) includes a fixing block (21), which is fixed to one side of the cylinder body (1). The fixing block (21) has a groove (22) that communicates with the inner cavity of the cylinder body (1). A first spring (23) is provided in the groove (22). A block (24) is fixedly connected to one end of the first spring (23). A plurality of oil distribution ports (25) are provided in the groove (22). An oil outlet (26) communicating with the oil distribution ports (25) is provided at the bottom of the cylinder body (1). An oil inlet (2101) communicating with the groove (22) is fixedly connected to the top of the fixing block (21).

2. The multi-stage buffer mechanism for hydraulic cylinders according to claim 1, characterized in that: A support rod (27) is fixedly connected inside the groove (22). The first spring (23) is slidably sleeved on the outside of the support rod (27). One end of the support rod (27) passes through the block (24) and is slidably connected to the block (24).

3. The multi-stage buffer mechanism for hydraulic cylinders according to claim 1, characterized in that: The surface of the block (24) is fixed with a first limiting block (28), and the inner wall of the groove (22) is provided with a first limiting groove (29). The first limiting block (28) is slidably connected in the first limiting groove (29).

4. The multi-stage buffer mechanism for hydraulic cylinders according to claim 1, characterized in that: The final stage buffer assembly (3) includes a base frame (31), which is fixedly installed inside the cylinder body (1). A second spring (32) is provided inside the base frame (31), and one end of the second spring (32) is fixedly connected to a top plate (33) that cooperates with the piston rod (101).

5. The multi-stage buffer mechanism for hydraulic cylinders according to claim 4, characterized in that: The base frame (31) has a plurality of first openings (3101) on its surface, and the top plate (33) has a plurality of second openings (3301) on its surface.

6. The multi-stage buffer mechanism for hydraulic cylinders according to claim 4, characterized in that: The base frame (31) is fixedly provided with a positioning sleeve (34), and the bottom of the top plate (33) is fixedly connected with a positioning rod (35). One end of the positioning rod (35) is slidably connected in the positioning sleeve (34), and the positioning rod (35) and the positioning sleeve (34) are located inside the second spring (32).

7. The multi-stage buffer mechanism for hydraulic cylinders according to claim 6, characterized in that: The inner wall of the positioning sleeve (34) is fixedly provided with a second limiting block (3401), and the surface of the positioning rod (35) is provided with a second limiting groove (3402). The second limiting block (3401) is slidably disposed in the second limiting groove (3402).

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