A hydraulic cylinder with an adjustable buffer structure

Abstract

This utility model relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder with an adjustable buffer structure. It includes a hydraulic cylinder body and a drive shaft. The hydraulic cylinder body is mounted on a support frame, and multiple connecting frames are mounted on the support frame. Fixed plates connected to the support frame are fixedly mounted at both ends of the connecting frames. Compared to traditional hydraulic cylinder bodies without an adjustable buffer structure, this utility model, through the inclusion of a buffer structure, prevents dust intrusion caused by the PTFE dust seal detaching from the metal frame due to impact vibration, thus avoiding rapid failure of the sealing system and tearing of the seal lip. This significantly improves the mean time between failures (MTBF) of the hydraulic cylinder body, extends the service life of the hydraulic cylinder, and reduces operating costs.

Description

Technical Field

[0001] This utility model relates to adjustable hydraulic cylinders, and more particularly to a hydraulic cylinder with an adjustable buffer structure, belonging to the field of hydraulic cylinder technology. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy. It is mainly used to achieve high power density and low inertia linear motion control. It drives a piston or plunger to perform linear reciprocating motion through the pressure of hydraulic oil and is widely used in the hydraulic systems of various machines.

[0003] Traditional hydraulic cylinders have a simple structure, and some hydraulic cylinders do not have an adjustable buffer structure. If the hydraulic cylinder lacks an adjustable buffer structure, it may cause the sealing system to fail quickly and the seal lip to tear. At the same time, impact and vibration may cause the PTFE dust ring to detach from the metal frame, resulting in dust intrusion, reduced system life, and a surge in total life cycle cost. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hydraulic cylinder with an adjustable buffer structure, which effectively avoids impact vibration and improves the service life of the hydraulic system.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A hydraulic cylinder with an adjustable buffer structure includes a hydraulic cylinder body and a drive shaft. The hydraulic cylinder body is mounted on a support frame, and a buffer structure body is provided on the hydraulic cylinder body. The buffer structure body includes a buffer plate fixedly installed at the bottom of the drive shaft. Multiple first movable blocks are fixedly installed at the bottom of the buffer plate. Multiple connecting frames are installed on the support frame. Fixed plates connected to the support frame are fixedly installed at both ends of the connecting frames. First bolts connected to the support frame are installed on the fixed plates. Shock absorbers are fixedly installed inside the connecting frames. A second movable block is fixedly installed at one end of the shock absorber. The first movable blocks and the second movable blocks are connected by a connecting rod. A second bolt connected to the second movable block is installed on the connecting frames. A pressure shaft is fixedly installed on the buffer plate. A through hole adapted to the pressure shaft is provided on the support frame.

[0007] Furthermore, dust covers are provided on both sides of the support frame, and the dust covers are installed on both sides of the support frame through a snap-fit ​​structure; the snap-fit ​​structure includes multiple connecting holes provided on the dust covers and the support frame; a plug is movably installed inside the connecting hole, a latch is fixedly installed at one end of the plug, multiple grooves are provided on the support frame to cooperate with the latch, and a toothed ring is fixedly installed at the other end of the plug.

[0008] Furthermore, a plurality of first connecting plates are fixedly installed on the dust cover, and a first electric telescopic rod is fixedly installed at one end of the first connecting plate. The output end of the first electric telescopic rod is equipped with a locking tooth that meshes with the toothed ring.

[0009] Furthermore, a fixed post is fixedly installed at the output end of the first electric telescopic rod, and a fixed ring connected to the fixed post is fixedly installed at one end of the locking tooth. The fixed post has multiple first mounting holes, and a first spring is provided inside the first mounting hole. A locking ball is fixedly installed at one end of the first spring, and multiple first locking holes that cooperate with the locking ball are provided on the fixed ring.

[0010] Furthermore, a second connecting plate is fixedly installed on both sides of the support frame, a second electric telescopic rod is fixedly installed at the bottom of the second connecting plate, and a suction cup is installed at the output end of the second electric telescopic rod.

[0011] Furthermore, a fixed frame is fixedly installed at the output end of the second electric telescopic rod, and a connecting block connected to the fixed frame is fixedly installed on the suction cup. The connecting block has multiple second mounting holes, and a second spring is installed inside the second mounting hole. A locking block is installed at one end of the second spring, and multiple second locking holes adapted to the locking block are opened on the fixed frame.

[0012] Furthermore, multiple limiting blocks are fixedly installed on the fixed frame, and push blocks are arranged between the limiting blocks. A limiting rod is fixedly installed at one end of the push block, and a limiting hole adapted to the limiting rod is opened on the locking block.

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

[0014] Compared to traditional hydraulic cylinder bodies without adjustable buffer structures, this invention, through the inclusion of a buffer structure, prevents dust intrusion caused by the PTFE dust seal separating from the metal frame due to impact vibrations. This also prevents rapid failure of the sealing system and tearing of the seal lip, significantly increasing the mean time between failures (MTBF) of the hydraulic cylinder body, extending its service life, and reducing operating costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the shock absorber structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the first movable block structure of this utility model;

[0018] Figure 4 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 5 For the present utility model Figure 2 Enlarged view at point B in the middle;

[0020] Figure 6 For the present utility model Figure 3 Enlarged view of point C in the middle.

[0021] In the diagram, 1. Hydraulic cylinder body; 2. Drive shaft; 3. Support frame; 4. Buffer structure body; 5. Buffer plate; 6. First movable block; 7. Connecting frame; 8. Fixing plate; 9. First bolt; 10. Shock absorber; 11. Second movable block; 12. Connecting rod; 13. Second bolt; 14. Pressure shaft; 15. Through hole; 16. Dust cover; 17. Connecting hole; 18. Insert rod; 19. Bolt; 20. Gear ring; 21. First connecting plate; 22. First 23. Electric telescopic rod; 24. Clamping tooth; 25. Fixing post; 26. Fixing ring; 27. First mounting hole; 28. First spring; 29. ​​Clamping ball; 30. First clamping hole; 31. Second electric telescopic rod; 32. Suction cup; 33. Fixing frame; 34. Connecting block; 35. Second mounting hole; 36. Second spring; 37. Clamping block; 38. Second clamping hole; 39. Limiting block; 40. Push block; 41. Limiting rod; 42. Limiting hole. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments.

[0023] like Figures 1-6The hydraulic cylinder shown includes a hydraulic cylinder body 1 and a drive shaft 2. The hydraulic cylinder body 1 is mounted on a support frame 3. A buffer structure body 4 is provided on the hydraulic cylinder body 1. The buffer structure body 4 includes a buffer plate 5 fixedly mounted on the bottom of the drive shaft 2. Multiple first movable blocks 6 are fixedly mounted on the bottom of the buffer plate 5. Multiple connecting frames 7 are mounted on the support frame 3. Fixed plates 8 connected to the support frame 3 are fixedly mounted at both ends of the connecting frames 7. First bolts 9 connected to the support frame 3 are mounted on the fixed plates 8. A shock absorber 10 is fixedly mounted inside the connecting frames 7. A second movable block 11 is fixedly mounted at one end of the shock absorber 10. The first movable blocks 6 and the second movable blocks 11 are connected by a connecting rod 12. A second bolt 13 connected to the second movable blocks 11 is mounted on the connecting frames 7. A pressure shaft 14 is fixedly mounted on the buffer plate 5. The support frame 3 has openings adapted to the pressure shaft 14. The through hole 15; the buffer structure body 4 enables the hydraulic cylinder body 1 to have an adjustable buffer function, avoiding the rapid failure of the sealing system and tearing of the seal lip due to the lack of an adjustable buffer structure; when the hydraulic cylinder body 1 starts to run, the transmission shaft 2 drives the buffer plate 5 to descend, pushing the connecting rod 12 to drive the second movable block 11 to squeeze the shock absorber 10. The shock absorber 10 can buffer the thrust of the connecting rod 12, thereby reducing the impact force of the hydraulic cylinder body 1 driving the transmission shaft 2 to press down; since the shock absorbers 10 commonly used in this field have different models and different pressure buffering effects, the first bolt 9 and the second bolt 13 can be removed from the fixing plate 8 and the connecting frame 7 respectively, and the connecting frame 7 and the shock absorber 10 inside it can be replaced. Adjusting and replacing the shock absorber 10 can change the buffering effect of the hydraulic cylinder body 1; the pressure shaft 14 at the bottom of the buffer plate 5 can press the object through the through hole 15.

[0024] like Figure 5 As shown, dust covers 16 are provided on both sides of the support frame 3. The dust covers 16 are installed on both sides of the support frame 3 by a snap-fit ​​structure. The snap-fit ​​structure includes multiple connecting holes 17 on the dust covers 16 and the support frame 3. Insert rods 18 are movably installed inside the connecting holes 17. One end of the insert rod 18 is fixedly installed with a latch 19. The support frame 3 has multiple grooves that cooperate with the latch 19. The other end of the insert rod 18 is fixedly installed with a toothed ring 20. After the dust covers 16 are attached to both sides of the support frame 3, the insert rods 18 are inserted into the connecting holes 17 to connect the dust covers 16 and the support frame 3. Rotating the insert rods 18 will engage the latches 19 in the grooves on the support frame 3, fixing the dust covers 16 to both sides of the support frame 3. The dust covers 16 can prevent dust from entering the interior of the buffer structure body 4 and prevent hard particles in the dust from moving in the gap between the valve core and the valve sleeve, forming plough-like wear, which would lead to a decrease in the buffer pressure adjustment accuracy.

[0025] like Figure 5 As shown, multiple first connecting plates 21 are fixedly installed on the dust cover 16. A first electric telescopic rod 22 is fixedly installed at one end of the first connecting plate 21. A locking tooth 23 that meshes with the toothed ring 20 is installed at the output end of the first electric telescopic rod 22. When the first electric telescopic rod 22 is activated, the locking tooth 23 moves to the position of the toothed ring 20. When the locking tooth 23 meshes with the toothed ring 20, it can limit the insertion rod 18 and improve the stability of the dust cover 16 on both sides of the support frame 3. When the first electric telescopic rod 22 retracts, it can drive the locking tooth 23 to disengage from the toothed ring 20, so that the insertion rod 18 can rotate normally.

[0026] like Figure 5 As shown, a fixed post 24 is fixedly installed at the output end of the first electric telescopic rod 22. A fixed ring 25 connected to the fixed post 24 is fixedly installed at one end of the locking tooth 23. The fixed post 24 has multiple first mounting holes 26. A first spring 27 is installed inside the first mounting hole 26. A locking ball 28 is fixedly installed at one end of the first spring 27. The fixed ring 25 has multiple first locking holes 29 that cooperate with the locking ball 28. When the fixed post 24 is inserted into the fixed ring 25, the locking ball 28 can pop out and lock into the first locking hole 29 under the elastic action of the first spring 27, fixing the fixed post 24 inside the fixed ring 25. When the locking tooth 23 is pulled, the locking ball 28 is squeezed and retracted to the inside of the fixed ring 25, and the locking tooth 23 can be removed from the first electric telescopic rod 22, making it convenient to disassemble and replace the locking tooth 23.

[0027] like Figure 3 and Figure 6 As shown, a second connecting plate 30 is fixedly installed on both sides of the support frame 3. A second electric telescopic rod 31 is fixedly installed at the bottom of the second connecting plate 30. A suction cup 32 is installed at the output end of the second electric telescopic rod 31. Simultaneously activating multiple second electric telescopic rods 31 to extend can drive the suction cup 32 to descend until it adheres to the ground, thereby improving the stability of the support frame 3 and preventing the support frame 3 from shaking or shifting when the hydraulic cylinder body 1 is working.

[0028] like Figure 6As shown, a fixed frame 33 is fixedly installed at the output end of the second electric telescopic rod 31. A connecting block 34 connected to the fixed frame 33 is fixedly installed on the suction cup 32. The connecting block 34 has multiple second mounting holes 35. A second spring 36 is installed inside the second mounting hole 35. A locking block 37 is installed at one end of the second spring 36. The fixed frame 33 has multiple second locking holes 38 that are adapted to the locking block 37. After the connecting block 34 is inserted into the fixed frame 33, the locking block 37 can pop out and lock into the second locking hole 38 under the elastic action of the second spring 36, thereby fixing the suction cup 32 to the second electric telescopic rod 31. After pressing the locking block 37 to retract it to the inside of the fixed frame 33, the connecting block 34 can be pulled out from the fixed frame 33, which is convenient for disassembling and replacing the connecting block 34.

[0029] like Figure 6 As shown, multiple limiting blocks 39 are fixedly installed on the fixed frame 33, and push blocks 40 are arranged between the limiting blocks 39. A limiting rod 41 is fixedly installed at one end of the push block 40. A limiting hole 42 adapted to the limiting rod 41 is opened on the locking block 37. When the locking block 37 is engaged inside the second locking hole 38, the push block 40 is pushed to make the limiting rod 41 insert into the limiting hole 42 on the locking block 37, which can limit the locking block 37 and improve its stability inside the second locking hole 38, making the suction cup 32 more stable. After pulling the push block 40 to make the limiting rod 41 disengage from the limiting hole 42, the locking block 37 can be pressed normally.

[0030] like Figures 1-6 As shown, the working process of the hydraulic cylinder with an adjustable buffer structure provided in this embodiment is as follows:

[0031] When the hydraulic cylinder body 1 starts running, the transmission shaft 2 drives the buffer plate 5 to descend. During the descent of the buffer plate 5, it pushes the connecting rod 12. At the same time, the connecting rod 12 drives the second movable block 11 to squeeze the shock absorber 10. At this time, the shock absorber 10 can buffer the thrust of the connecting rod 12, thereby reducing the impact force of the hydraulic cylinder body 1 driving the transmission shaft 2 to press down. Since the shock absorber 10 has different buffering effects depending on its model, it can be replaced by removing the connecting frame 7 and the shock absorber 10 inside it after removing it from the fixing plate 8 and the connecting frame 7 with the first bolt 9 and the second bolt 13 respectively. Adjusting and replacing the shock absorber 10 can change the buffering effect of the hydraulic cylinder body 1. The pressure shaft 14 at the bottom of the buffer plate 5 can press the object through the through hole 15.

[0032] The foregoing description illustrates and describes preferred embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein. Any modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A hydraulic cylinder with an adjustable buffer structure, comprising a hydraulic cylinder body (1) and a transmission shaft (2), wherein the hydraulic cylinder body (1) is mounted on a support frame (3), characterized in that: The hydraulic cylinder body (1) is provided with a buffer structure body (4); The main body (4) of the buffer structure includes a buffer plate (5) fixedly installed at the bottom of the transmission shaft (2). Multiple first movable blocks (6) are fixedly installed at the bottom of the buffer plate (5). Multiple connecting frames (7) are installed on the support frame (3). A shock absorber (10) is fixedly installed inside the connecting frame (7). A second movable block (11) is fixedly installed at one end of the shock absorber (10). The first movable block (6) and the second movable block (11) are connected by a connecting rod (12). A pressure shaft (14) is fixedly installed on the buffer plate (5), and a through hole (15) adapted to the pressure shaft (14) is provided on the support frame (3).

2. The hydraulic cylinder with an adjustable buffer structure according to claim 1, characterized in that: Dust covers (16) are provided on both sides of the support frame (3), and the dust covers (16) are installed on both sides of the support frame (3) by a snap-fit ​​structure.

3. The hydraulic cylinder with an adjustable buffer structure according to claim 2, characterized in that: The locking structure includes multiple connecting holes (17) provided on the dust cover (16) and the support frame (3). A plug rod (18) is movably installed inside the connecting hole (17). A latch (19) is fixedly installed at one end of the plug rod (18). Multiple grooves that cooperate with the latch (19) are provided on the support frame (3). A toothed ring (20) is fixedly installed at the other end of the plug rod (18).

4. The hydraulic cylinder with an adjustable buffer structure according to claim 3, characterized in that: Multiple first connecting plates (21) are fixedly installed on the dust cover (16). A first electric telescopic rod (22) is fixedly installed at one end of the first connecting plate (21). A locking tooth (23) that meshes with the toothed ring (20) is installed at the output end of the first electric telescopic rod (22). The output end of the first electric telescopic rod (22) is fixedly installed with a fixed post (24), and one end of the locking tooth (23) is fixedly installed with a fixing ring (25) connected to the fixed post (24). The fixed post (24) is provided with a plurality of first mounting holes (26), and a first spring (27) is provided inside the first mounting hole (26). One end of the first spring (27) is fixedly installed with a locking ball (28), and the fixing ring (25) is provided with a plurality of first locking holes (29) that cooperate with the locking ball (28).

5. The hydraulic cylinder with an adjustable buffer structure according to claim 1, characterized in that: The support frame (3) is fixedly installed with a second connecting plate (30) on both sides. A second electric telescopic rod (31) is fixedly installed at the bottom of the second connecting plate (30). A suction cup (32) is installed at the output end of the second electric telescopic rod (31).

6. The hydraulic cylinder with an adjustable buffer structure according to claim 5, characterized in that: A fixed frame (33) is fixedly installed at the output end of the second electric telescopic rod (31). A connecting block (34) connected to the fixed frame (33) is fixedly installed on the suction cup (32). A plurality of second mounting holes (35) are provided on the connecting block (34). A second spring (36) is provided inside the second mounting hole (35). A locking block (37) is installed at one end of the second spring (36). A plurality of second locking holes (38) adapted to the locking block (37) are provided on the fixed frame (33).

7. The hydraulic cylinder with an adjustable buffer structure according to claim 6, characterized in that: Multiple limiting blocks (39) are fixedly installed on the fixed frame (33), and a push block (40) is provided between the limiting blocks (39). A limiting rod (41) is fixedly installed at one end of the push block (40), and a limiting hole (42) adapted to the limiting rod (41) is provided on the locking block (37).

8. The hydraulic cylinder with an adjustable buffer structure according to claim 1, characterized in that: The two ends of the connecting frame (7) are fixedly installed with fixing plates (8) that are connected to the support frame (3), and the fixing plates (8) are equipped with first bolts (9) that are connected to the support frame (3).

9. The hydraulic cylinder with an adjustable buffer structure according to claim 1, characterized in that: The connecting frame (7) is equipped with a second bolt (13) that connects to the second movable block (11).

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