Buffer type hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a buffer type hydraulic oil cylinder which comprises a cylinder body, a piston cavity is formed in the inner side of the cylinder body, a piston block is connected to the inner side of the piston cavity in a sliding mode, and a piston rod is fixedly connected to the outer wall of one side of the piston block. When the spring is replaced, the fixing block is taken out through the corresponding mounting hole, the mounting rod is rotated at the moment until the spring can be taken out from the mounting rod, the damping rotating shaft ensures that the mounting rod can be kept at a designated position after rotating, after the spring is taken out from the mounting rod, the replaced spring is arranged on the outer side of the mounting rod in a sleeving mode, and then the mounting rod is rotated into the connecting groove. When the spring is replaced, the replaced spring is located between the mounting base and the lifting base, then the fixing blocks are placed into the fixing grooves, and finally hexagon socket screws penetrate through the corresponding mounting holes one by one and are screwed into the corresponding screw holes one by one through a tool, so that the fixing blocks are fixed into the fixing grooves.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a buffer hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a device that converts hydraulic energy into mechanical energy using hydraulic principles. It typically consists of key components such as a cylinder body, piston, and piston rod. These components work together to enable the hydraulic cylinder to perform linear reciprocating motion. Hydraulic cylinders can generate enormous output force because their working principle is based on hydraulic principles, achieving the conversion of mechanical energy through the pressure transmission of liquid. At the same time, hydraulic cylinders have high power density, meaning they can generate a large power output within a small volume. This makes hydraulic cylinders perform exceptionally well in applications requiring high torque and heavy loads.

[0003] A search revealed that Chinese Patent CN220118435U discloses a buffer hydraulic cylinder, including a cylinder body with an oil chamber inside. A fixing member is installed inside the oil chamber, and a piston rod is installed inside the oil chamber, passing through the inside of the fixing member. A blocking member is connected to the piston rod, and a spring is installed on the piston rod, located between the blocking member and the fixing member. In this invention, the movement of the piston rod causes the blocking member to move. When the blocking member moves, the spring deforms and unfolds. When the piston rod needs to return to its original position, the blocking member pushes the spring, and the spring's force provides a buffering effect. Rotating the blocking member, which has an annular groove, does not affect its rotation by half a turn, allowing adjustment of the blocking member's position on the piston rod, thereby adjusting the spring's buffering force.

[0004] The existing device has some drawbacks in use. For example, in the above scheme, when the piston rod moves, it will drive the blocking component to move. When the blocking component moves, the spring will deform and unfold. When the piston rod needs to return to its original position, the blocking component can push the spring. The force of the spring can play a buffering role. However, in actual use, the elasticity of the spring will weaken after a long period of use, so the spring needs to be replaced. Since the spring in the above scheme is set in the oil chamber, the hydraulic cylinder needs to be disassembled before replacement. This will cause the hydraulic oil in the oil chamber to leak out. This will not only waste oil, but also pollute the surrounding environment. At the same time, if the replacement is not handled properly, impurities will enter the oil chamber, further contaminating the hydraulic oil and affecting the performance and life of the hydraulic cylinder. Utility Model Content

[0005] The purpose of this invention is to provide a buffer hydraulic cylinder that solves the problem that the hydraulic cylinder needs to be completely disassembled when replacing the spring in the above solutions.

[0006] This utility model provides the following technical solution: a buffer hydraulic cylinder, including a cylinder body, a piston chamber is formed on the inner side of the cylinder body, a piston block is slidably connected to the inner side of the piston chamber, a piston rod is fixedly connected to one side outer wall of the piston block, the end of the piston rod away from the piston block passes laterally through one side outer wall of the cylinder body and is slidably connected to one side outer wall of the cylinder body, an ear ring is fixedly connected to the end of the piston rod away from the piston block, an installation ring is fixedly connected to the end of the cylinder body away from the ear ring, a first oil nozzle is fixedly connected to one side outer wall of the top of the cylinder body, a second oil nozzle is fixedly connected to one side outer wall of the bottom of the cylinder body, both the first oil nozzle and the second oil nozzle communicate with the piston chamber, and a buffer assembly is provided on the cylinder body.

[0007] In the above solution, the buffer assembly effectively avoids direct collision between the piston block and the inner wall of the piston chamber, reduces wear caused by the collision, and extends the service life of the hydraulic cylinder and its components.

[0008] As a preferred embodiment of the above technical solution, the buffer assembly includes a mounting base with a first through hole. The mounting base passes through the outside of the piston rod through the first through hole and is fixedly connected to the outer wall of the cylinder near the ear ring. A lifting seat is provided above the mounting base, and a second through hole is provided on the lifting seat. The lifting seat passes through the outside of the piston rod through the second through hole. Sliding rods are fixedly connected to the four corners of the upper end face of the mounting base. The four sliding rods vertically pass through the lifting seat and are slidably connected to the lifting seat.

[0009] In the above scheme, the slide bar provides a clear guide path for the movement of the lifting seat, ensuring that the lifting seat can move smoothly in the predetermined direction when subjected to thrust.

[0010] As a preferred embodiment of the above technical solution, the buffer assembly includes mounting slots respectively opened on the four side walls of the mounting base. The inner walls of the four mounting slots on opposite sides are rotatably connected to mounting rods via damping shafts. The four side walls of the lifting base are each provided with a connecting slot the size of the mounting rod. The end of each of the four mounting rods away from the mounting base passes vertically through the corresponding connecting slot and cooperates with the corresponding connecting slot. Springs are sleeved on the outer side of each of the four mounting rods, and the four springs are disposed between the lifting base and the mounting base.

[0011] In the above scheme, the damping shaft enables the mounting rod to maintain its posture when it is rotated to the designated position.

[0012] As a preferred embodiment of the above technical solution, the buffer assembly includes fixing slots respectively opened at the corresponding connection slot positions on the four side walls of the lifting seat. Each of the four fixing slots is provided with a fixing block, and each of the four fixing blocks is provided with two mounting holes. The two mounting holes in the same group are symmetrically arranged. Each of the four fixing slots has two screw holes at the position corresponding to the mounting holes on one side of the inner wall. The mounting holes and screw holes in the same group are provided with hexagon socket screws, and multiple hexagon socket screws are threadedly connected to the corresponding screw holes.

[0013] In the above solution, hex socket screws are used for connection, making the installation and removal of the fixing block simple and quick.

[0014] As a preferred embodiment of the above technical solution, the four connecting slots are respectively matched with the shapes of the corresponding mounting rods, and the four fixing blocks are respectively matched with the shapes of the corresponding mounting rods.

[0015] In the above solution, the shape of the connecting groove and the fixing block matches that of the mounting rod, preventing the mounting rod from wobbling between the connecting groove and the fixing block.

[0016] As a preferred embodiment of the above technical solution, a rubber protective pad is provided between the lifting seat and the earring. The rubber protective pad has a third through hole, and the rubber protective pad passes through the outer side of the piston rod through the third through hole. The outer wall of the rubber protective pad near the lifting seat is fixedly connected to the lifting seat.

[0017] In the above solution, when the earring moves and comes into contact with the rubber protective pad, the rubber protective pad can absorb and disperse the resulting impact force, thus playing a buffering role.

[0018] As a preferred embodiment of the above technical solution, a limit block is fixedly connected to the top of each of the four slide bars.

[0019] In the above solution, the limiting block prevents the lifting seat from falling off due to excessive movement.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] In this invention, two hexagonal socket screws of the same set are unscrewed from their corresponding screw holes and removed through their corresponding mounting holes to take out the fixing block. The mounting rod is then rotated until the spring can be removed from it. After the spring is removed, the replacement spring is fitted onto the outside of the mounting rod. The mounting rod is then rotated into the connecting groove, positioning the replacement spring between the mounting base and the lifting base. The fixing block is then placed into the fixing groove. Finally, the hexagonal socket screws are passed through their corresponding mounting holes and screwed into them to fix the fixing block in the fixing groove. This method eliminates the need to completely disassemble the hydraulic cylinder when replacing the spring, avoiding hydraulic oil leakage and contamination. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a buffer hydraulic cylinder;

[0023] Figure 2 This is a cross-sectional structural schematic diagram of a buffer-type hydraulic cylinder;

[0024] Figure 3 This is a schematic diagram of the buffer assembly structure of a buffer-type hydraulic cylinder;

[0025] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0026] In the diagram: 10. Cylinder block; 11. Piston chamber; 12. Piston block; 13. Piston rod; 14. Earring; 15. Mounting ring; 16. First oil nozzle; 17. Second oil nozzle; 2. Buffer assembly; 201. Mounting seat; 202. First through hole; 203. Lifting seat; 204. Second through hole; 205. Slide rod; 206. Mounting groove; 207. Mounting rod; 208. Connecting groove; 209. Spring; 210. Fixing groove; 211. Fixing block; 212. Mounting hole; 213. Screw hole; 214. Socket head screw; 30. Rubber protective pad; 31. Third through hole; 40. Limiting block. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] Example

[0029] like Figures 1-4As shown, this utility model provides a technical solution: a buffer hydraulic cylinder, including a cylinder body 10, a piston chamber 11 is formed inside the cylinder body 10, a piston block 12 is slidably connected to the inside of the piston chamber 11, a piston rod 13 is fixedly connected to one side of the outer wall of the piston block 12, one end of the piston rod 13 away from the piston block 12 passes laterally through one side of the outer wall of the cylinder body 10 and is slidably connected to one side of the outer wall of the cylinder body 10, an ear ring 14 is fixedly connected to one end of the piston rod 13 away from the piston block 12, an mounting ring 15 is fixedly connected to one end of the cylinder body 10 away from the ear ring 14, a first oil nozzle 16 is fixedly connected to one side of the outer wall of the top of the cylinder body 10, and a second oil nozzle 17 is fixedly connected to one side of the outer wall of the bottom of the cylinder body 10. Both the first oil nozzle 16 and the second oil nozzle 17 communicate with the piston chamber 11. A buffer assembly 2 is provided on the cylinder body 10. In specific use, the ear ring 14 and the mounting ring 15 are connected to the piston chamber 11. The mounting ring 15 is installed in the designated position, and then the first oil nozzle 16 and the second oil nozzle 17 are connected to the external hydraulic system. When the piston rod 13 needs to extend, the hydraulic system supplies oil to the piston chamber 11 through the second oil nozzle 17. At the same time, the original hydraulic oil in the piston chamber 11 is discharged through the first oil nozzle 16. The entry of oil pushes the piston block 12 to move, thereby driving the piston rod 13 to extend. When the piston rod 13 needs to retract, the hydraulic system supplies oil to the piston chamber 11 through the first oil nozzle 16. At the same time, the original hydraulic oil in the piston chamber 11 is discharged through the second oil nozzle 17. The entry of oil pushes the piston block 12 to move in the opposite direction, thereby driving the piston rod 13 to retract. The retraction of the piston block 12 will directly collide with the inner wall of one side of the piston chamber 11. The buffer assembly 2 is used to avoid the direct collision between the piston block 12 and the inner wall of one side of the piston chamber 11.

[0030] As one implementation method in this embodiment, such as Figure 3 and Figure 4As shown, the buffer assembly 2 includes a mounting base 201 with a first through hole 202 through which the mounting base 201 passes through the piston rod 13 and is fixedly connected to the outer wall of the cylinder body 10 near the ear ring 14. A lifting seat 203 is provided above the mounting base 201, with a second through hole 204 through which the lifting seat 203 passes through the piston rod 13. Slide rods 205 are fixedly connected to the four corners of the upper surface of the mounting base 201, vertically penetrating the lifting seat 203 and slidably connected to it. The buffer assembly 2 includes mounting grooves 206 respectively formed on the four side walls of the mounting base 201. The four mounting grooves 206 are located on opposite sides of the inner... Each wall is rotatably connected to a mounting rod 207 via a damping shaft. Each of the four side walls of the lifting seat 203 has a connecting groove 208 the size of the mounting rod 207. The ends of the four mounting rods 207 furthest from the mounting seat 201 vertically pass through the corresponding connecting grooves 208 and engage with them. Springs 209 are fitted onto the outer sides of each of the four mounting rods 207, and these springs 209 are positioned between the lifting seat 203 and the mounting seat 201. The buffer assembly 2 includes fixing grooves 210 respectively located at the corresponding connecting grooves 208 on the four side walls of the lifting seat 203. Each of the four fixing grooves 210 has a fixing block 211 inside, and each of the four fixing blocks 211 has two mounting holes 212. The two mounting holes 212 in the same group are symmetrically arranged. Two screw holes 213 are provided on the inner wall of one side of the fixing groove 210 at the position corresponding to the mounting hole 212. Hex socket screws 214 are provided on the inner side of the same set of mounting holes 212 and screw holes 213, and multiple hex socket screws 214 are threaded into the corresponding screw holes 213. Four connecting grooves 208 are respectively matched in shape to the corresponding mounting rods 207, and four fixing blocks 211 are respectively matched in shape to the corresponding mounting rods 207. A rubber protective pad 30 is provided between the lifting seat 203 and the ear ring 14. A third through hole 31 is provided on the rubber protective pad 30. The rubber protective pad 30 passes through the third through hole 31 to the outside of the piston rod 13, and the outer wall of the rubber protective pad 30 near the lifting seat 203 is fixedly connected to the lifting seat 203. Four sliding rods 2... 05. Limiting blocks 40 are fixedly connected to the top of each component. In actual use, when the piston block 12 retracts and drives the piston rod 13 to move, the piston rod 13 drives the ear ring 14 to move. During the movement, the ear ring 14 contacts the rubber protective pad 30 on the lifting seat 203. As the lifting seat 203 is pushed by the ear ring 14, it begins to slide downward along the slide rod 205, while simultaneously compressing the spring 209. The compression of the spring 209 slows down the movement speed of the piston block 12, thereby avoiding direct collision between the piston block 12 and the inner wall of one side of the piston chamber 11. When the piston rod 13 extends, it drives the ear ring 14 to move. During the movement, the ear ring 14 moves away from the lifting seat 203. At this time, the spring 209 releases its compressive force, causing the lifting seat 203 to move upward along the slide rod 205.During the movement of the lifting seat 203, the limiting block 40 prevents the lifting seat 203 from moving excessively. The spring 209, after prolonged use, will lose elasticity, affecting its cushioning effect. Therefore, the spring 209 needs to be replaced. When replacing the spring 209, use a tool to unscrew the two hexagonal socket screws 214 from their corresponding screw holes 213 and remove them through the corresponding mounting holes 212, thereby removing the fixing block 211. Then, rotate the mounting rod 207 until the spring 209 can be removed from the mounting rod 207. The damping shaft ensures that the mounting rod 207 remains in place after rotation. At the designated location, after removing spring 209 from mounting rod 207, insert the replaced spring 209 onto the outside of mounting rod 207. Then, rotate mounting rod 207 into connecting groove 208, positioning the replaced spring 209 between mounting base 201 and lifting base 203. Next, place fixing block 211 into fixing groove 210. Finally, using a tool, pass hex socket screws 214 one by one through the corresponding mounting holes 212 and screw them into the corresponding screw holes 213, fixing fixing block 211 in fixing groove 210. Repeat the above steps to replace spring 209 one by one until all springs 209 have been replaced.

[0031] Working principle: The earring 14 and mounting ring 15 are installed in the designated positions. The first oil nozzle 16 and the second oil nozzle 17 are then connected to the external hydraulic system. When the piston rod 13 retracts, the hydraulic system supplies oil to the piston chamber 11 through the first oil nozzle 16. Simultaneously, the existing hydraulic oil in the piston chamber 11 is discharged through the second oil nozzle 17. The influx of oil pushes the piston block 12 to move in the opposite direction, thereby causing the piston rod 13 to retract. During the retraction process, the piston rod 13 moves the earring 14. During this movement, the earring 14 contacts the rubber protective pad 30 on the lifting seat 203. As the lifting seat 203 is pushed by the earring 14, it begins to move along... The slide bar 205 slides downwards, simultaneously compressing the spring 209. The compression of the spring 209 slows down the movement speed of the piston block 12, thus avoiding direct collision between the piston block 12 and the inner wall of one side of the piston chamber 11. When the piston rod 13 needs to extend, the hydraulic system supplies oil to the piston chamber 11 through the second oil nozzle 17. At the same time, the original hydraulic oil in the piston chamber 11 is discharged through the first oil nozzle 16. The entry of oil pushes the piston block 12 to move, thereby causing the piston rod 13 to extend. When the piston rod 13 extends, it will cause the ear ring 14 to move. During the movement, the ear ring 14 will move away from the lifting seat 203. At this time, the spring 209 releases its compression force, causing the lifting seat 203 to extend. The lowering seat 203 moves upward along the slide rod 205. During the movement of the lowering seat 203, the limiting block 40 prevents the lowering seat 203 from moving excessively. The spring 209's elasticity weakens after prolonged use, affecting its cushioning effect. Therefore, the spring 209 needs to be replaced. When replacing the spring 209, use a tool to unscrew the two hexagonal socket screws 214 from their corresponding screw holes 213 and remove them through their corresponding mounting holes 212, thus removing the fixing block 211. Then, rotate the mounting rod 207 until the spring 209 can be removed from the mounting rod 207. The damping shaft ensures that the mounting rod 207... After rotation, the spring 209 can be held in the designated position. After the spring 209 is removed from the mounting rod 207, the replaced spring 209 is put into the outside of the mounting rod 207. Then, the mounting rod 207 is rotated into the connecting groove 208, so that the replaced spring 209 is located between the mounting base 201 and the lifting base 203. Then, the fixing block 211 is placed into the fixing groove 210. Finally, the internal hex screws 214 are passed through the corresponding mounting holes 212 and screwed into the corresponding screw holes 213 one by one with the tool, so that the fixing block 211 is fixed in the fixing groove 210. The spring 209 is replaced one by one according to the above steps until all the springs 209 are replaced.

[0032] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A buffer-type hydraulic cylinder, comprising a cylinder body (10), characterized in that: A piston chamber (11) is provided inside the cylinder (10). A piston block (12) is slidably connected inside the piston chamber (11). A piston rod (13) is fixedly connected to one side of the outer wall of the piston block (12). The end of the piston rod (13) away from the piston block (12) passes through the outer wall of one side of the cylinder (10) and is slidably connected to the outer wall of one side of the cylinder (10). An earring (14) is fixedly connected to one side of the piston rod (13) away from the piston block (12). An installation ring (15) is fixedly connected to one side of the cylinder (10) away from the earring (14). A first oil nozzle (16) is fixedly connected to one side of the top of the cylinder (10). A second oil nozzle (17) is fixedly connected to one side of the bottom of the cylinder (10). Both the first oil nozzle (16) and the second oil nozzle (17) are connected to the piston chamber (11). A buffer assembly (2) is provided on the cylinder (10).

2. A buffer-type hydraulic cylinder according to claim 1, characterized in that: The buffer assembly (2) includes a mounting base (201), on which a first through hole (202) is provided. The mounting base (201) passes through the first through hole (202) through the outside of the piston rod (13), and the mounting base (201) is fixedly connected to the outer wall of the cylinder (10) near the ear ring (14). A lifting seat (203) is provided above the mounting base (201), on which a second through hole (204) is provided. The lifting seat (203) passes through the second through hole (204) through the outside of the piston rod (13). Slide rods (205) are fixedly connected to the four corners of the upper end face of the mounting base (201). The four slide rods (205) vertically pass through the lifting seat (203) and are slidably connected to the lifting seat (203).

3. A buffer-type hydraulic cylinder according to claim 2, characterized in that: The buffer assembly (2) includes mounting slots (206) respectively opened on the four side walls of the mounting base (201). The inner walls of the four mounting slots (206) are rotatably connected to mounting rods (207) through damping shafts. The four side walls of the lifting base (203) are provided with connecting slots (208) the size of the mounting rods (207). The end of the four mounting rods (207) away from the mounting base (201) passes vertically through the corresponding connecting slots (208) and cooperates with the corresponding connecting slots (208). The four mounting rods (207) are all fitted with springs (209) on the outside. The four springs (209) are located between the lifting base (203) and the mounting base (201).

4. A buffer-type hydraulic cylinder according to claim 3, characterized in that: The buffer assembly (2) includes fixing slots (210) respectively opened on the four side walls of the lifting seat (203) corresponding to the connecting slots (208). Each of the four fixing slots (210) is provided with a fixing block (211), and each of the four fixing blocks (211) is provided with two mounting holes (212). The two mounting holes (212) in the same group are symmetrically arranged. Each of the four fixing slots (210) is provided with two screw holes (213) on the inner wall of one side corresponding to the mounting holes (212). The inner sides of the mounting holes (212) and screw holes (213) in the same group are provided with hexagonal screws (214), and multiple hexagonal screws (214) are threadedly connected to the corresponding screw holes (213).

5. A buffer-type hydraulic cylinder according to claim 4, characterized in that: The four connecting slots (208) are respectively matched with the shape of the corresponding mounting rod (207), and the four fixing blocks (211) are respectively matched with the shape of the corresponding mounting rod (207).

6. A buffer-type hydraulic cylinder according to claim 2, characterized in that: A rubber protective pad (30) is provided between the lifting seat (203) and the earring (14). A third through hole (31) is provided on the rubber protective pad (30). The rubber protective pad (30) passes through the third through hole (31) to the outside of the piston rod (13), and the rubber protective pad (30) is fixedly connected to the outer wall of the lifting seat (203) on the side closest to the lifting seat (203).

7. A buffer-type hydraulic cylinder according to claim 2, characterized in that: Limiting blocks (40) are fixedly connected to the top of each of the four slide bars (205).

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