Hydraulic oil cylinder with buffer structure

Abstract

The invention relates to the field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a buffer structure, which comprises an oil cylinder main body, a cylinder seat is fixedly mounted at the lower end of the oil cylinder main body, forward moving wheels are mounted at two ends of the cylinder seat, a shaft bracket is fixedly mounted at the front end of the cylinder seat close to the edge, and a first shaft is rotatably mounted at the end part of the shaft bracket; a second shaft is rotationally installed in the middle of the front end of the shaft frame in a penetrating mode, the second shaft and the first shaft are coaxially arranged, and the rear end of the first shaft is fixed to one of the forward moving wheels. In the process that the piston rod retreats after the single pushing stroke is finished, the cylinder body part of the oil cylinder main body automatically moves forwards, the use convenience is effectively improved, the extending stroke of the piston rod can be slowed down, goods can be stably pushed, the retreating stroke of the piston rod is accelerated, consumed time is shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic cylinders, and particularly to a hydraulic cylinder with a buffer structure. Background Art

[0002] A hydraulic cylinder is an actuator in a hydraulic system, and its main function is to achieve linear reciprocating motion under the action of hydraulic oil, so as to push a load to do work. The hydraulic cylinder has the characteristics of simple structure and large output force. Among them, when pushing the goods on the ground rail, a hydraulic cylinder is often used for pushing.

[0003] However, in the actual pushing process, after the single pushing stroke of the hydraulic cylinder ends, it is necessary to wait for the piston rod to retract before manually pushing the hydraulic cylinder to move it forward on the ground rail close to the goods, and then the piston rod of the hydraulic cylinder can be extended again to push the goods. Its operation process is quite cumbersome, resulting in inconvenient use. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages in the background art, and to propose a hydraulic cylinder with a buffer structure.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a hydraulic cylinder with a buffer structure, including a cylinder body. A cylinder seat is fixedly installed at the lower end of the cylinder body. Front wheels are installed at both ends of the cylinder seat. A shaft frame is fixedly installed near the edge at the front end of the cylinder seat. A first shaft is rotatably installed at the end of the shaft frame. A second shaft is rotatably installed through the middle at the front end of the shaft frame. The second shaft and the first shaft are coaxially arranged. The rear end of the first shaft is fixed to one of the front wheels. A front movement ratchet is coaxially inlaid at the front end of the first shaft. A turntable is coaxially inlaid at the rear end of the second shaft. A pushing pawl is rotatably installed at the rear end edge of the turntable. The pushing pawl abuts against the front movement ratchet. A front movement gear is coaxially inlaid on the outer surface of the second shaft. A front movement rack is engaged with the lower part of the front movement gear. The front movement rack is connected to the piston rod of the cylinder body. A rail clamping member is arranged in the middle of the cylinder seat. A flow control member is arranged at the oil port of the cylinder body. A push cap is fixedly installed at the end of the piston rod of the cylinder body.

[0006] Preferably, a T-shaped seat is fixedly installed at the lower end of the shaft frame. The front movement rack is slidably installed on the outer surface of the T-shaped seat. A synchronization frame is fixedly installed at the end of the front movement rack. The end of the synchronization frame is fixed to the piston rod of the cylinder body.

[0007] Preferably, a top pawl spring is fixedly installed at the rear end edge of the turntable. A connection head is fixedly installed at the end of the top pawl spring. The connection head is rotatably connected to the pushing pawl.

[0008] Preferably, the rail clamping member includes a threaded rod rotatably installed through the middle of the cylinder seat. The threads at both ends of the threaded rod are symmetrically arranged. Threaded sleeves are screwed onto both ends of the threaded rod. A rail clamping seat is fixedly installed at the lower end of the threaded sleeve. Positioning wheels are elastically installed at both ends of the rail clamping seat.

[0009] Preferably, limiting frames are arranged on both sides of the threaded rod. The end of the limiting frame is fixed to the cylinder seat. The threaded sleeve is slidably installed on the outer surface of the limiting frame. Hexagonal guide posts are slidably installed through both ends of the rail clamping seat. A wheel seat is fixedly installed at the end of the hexagonal guide post. The positioning wheel is installed inside the wheel seat. An adaptive spring is wound around the outer side of the hexagonal guide post. Both ends of the adaptive spring are fixed to the wheel seat and the rail clamping seat respectively.

[0010] Preferably, the flow control member includes a connecting pipe fixedly installed at the oil port of the oil cylinder body. A flow control ball is fitted inside the connecting pipe. A control rod extends from the side of the flow control ball. The control rod penetrates through the outer surface of the connecting pipe. The control rod is rotatably matched with the connecting pipe. A control flap extends obliquely at the end of the control rod. Two fixed frames are symmetrically and fixedly installed at the upper end of one of the rail clamping seats. A control top plate is inlaid through the end of the fixed frame. The end of the control top plate abuts against the control flap.

[0011] Preferably, an extension frame extends from the outer surface of the connecting pipe. A positioning cap is fixedly installed at the end of the extension frame. A return torsion spring is arranged between the outer surface of the control rod and the outer surface of the connecting pipe.

[0012] Preferably, a plurality of small holes are evenly distributed and penetrated through the upper and lower end faces of the flow control ball. Large holes are penetrated through the front and rear ends of the flow control ball.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. When the piston rod of the oil cylinder body extends to push the goods on the ground rail, the forward moving tooth plate will be driven by the piston rod to move synchronously, so as to drive the forward moving gear to rotate. Furthermore, the pushing pawl on the turntable rotates on the outer surface of the forward moving ratchet. When the piston rod of the oil cylinder body retracts at the end of a single pushing stroke, the forward moving tooth plate will move in the reverse direction, and then drive the forward moving gear to rotate in the reverse direction. At this time, the pushing pawl on the turntable will abut against the forward moving ratchet to push the forward moving ratchet, so that the first shaft rotates, and then drives the forward moving wheel to roll on the ground rail, making the cylinder body part of the oil cylinder body move forward. In this way, during the process of the piston rod retracting at the end of a single pushing stroke, the cylinder body part of the oil cylinder body automatically moves forward. This process does not require workers to manually push the hydraulic cylinder forward, effectively improving the convenience of use.

[0014] 2. When the threaded rod is rotated to make the two rail clamping seats move toward each other to clamp on the ground rail to fix the oil cylinder body, the control top plate will move synchronously with the rail clamping seat to toggle the control paddle to allow the control rod to rotate, thereby driving the flow control ball to rotate inside the connecting pipe, so that the small hole on the flow control ball faces upward, allowing the hydraulic oil to flow into the oil cylinder body through the small hole, thereby increasing the resistance to the flow of hydraulic oil, thereby slowing down the extension stroke of the piston rod, so that it can stably push the goods. When the pushing is completed, the threaded rod is rotated in the opposite direction to allow the clamped rail clamping seat to separate from the ground rail. The rail clamping seat will drive the control top plate to gradually separate from the control paddle. At this time, the reset torsion spring will gradually restore its deformation to twist the control rod to reset it, so that the large hole on the flow control ball faces upward, allowing the hydraulic oil to flow smoothly, thereby accelerating the retraction stroke of the piston rod, shortening the time consumption, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a hydraulic cylinder with a buffer structure of the present invention; Figure 2 It is a schematic diagram of a turntable of a hydraulic cylinder with a buffer structure according to the present invention; Figure 3 It is a schematic diagram of another viewing angle of a turntable of a hydraulic oil cylinder with a buffer structure of the present invention; Figure 4 It is a schematic diagram of a rail clamping seat of a hydraulic oil cylinder with a buffer structure according to the present invention; Figure 5 It is a schematic diagram of a connecting pipe of a hydraulic oil cylinder with a buffer structure according to the present invention; Figure 6 This is an internal view of a pipe of a hydraulic cylinder with a buffer structure according to the present invention; Figure 7 It is a schematic diagram of a flow control ball of a hydraulic oil cylinder with a buffer structure according to the present invention; Figure 8 This is a usage view of a hydraulic cylinder with a buffer structure according to the present invention.

[0016] In the figure: 1. Cylinder body; 2. Push cap; 3. Pipe; 4. Fixed frame; 5. Control top plate; 6. Synchronous frame; 7. Turntable; 8. Shaft frame; 9. Cylinder seat; 10. Threaded rod; 11. Rail clamp seat; 12. Forward gear plate; 13. Forward wheel; 14. No. 1 shaft; 15. Forward ratchet; 16. Push ratchet; 17. Top claw spring; 18. Connector; 19. Extension frame; 20. T-shaped seat; 21. Control rod; 22. Flow control ball; 23. Small hole; 24. Large hole; 25. Forward gear; 26. No. 2 shaft; 27. Threaded sleeve; 28. Limit frame; 29. ​​Hexagonal guide column; 30. Adaptive spring; 31. Wheel seat; 32. Positioning wheel; 33. Reset torsion spring; 34. Control paddle; 35. Positioning cap; 36. Ground rail. Detailed implementation manners

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and other obvious variations can be conceived by those skilled in the art.

[0018] As Figures 1-8 shown, a hydraulic cylinder with a buffer structure includes a cylinder body 1. A cylinder seat 9 is fixedly installed at the lower end of the cylinder body 1. Front wheels 13 are installed at both ends of the cylinder seat 9. The cylinder seat 9 serves to carry the front wheels 13. A shaft frame 8 is fixedly installed near the edge at the front end of the cylinder seat 9. A first shaft 14 is rotatably installed at the end of the shaft frame 8. A second shaft 26 is rotatably installed through the middle at the front end of the shaft frame 8. The shaft frame 8 serves to carry the second shaft 26 and the first shaft 14. The second shaft 26 and the first shaft 14 are coaxially arranged. The rear end of the first shaft 14 is fixed to one of the front wheels 13. A front ratchet wheel 15 is coaxially embedded at the front end of the first shaft 14. A turntable 7 is coaxially embedded at the rear end of the second shaft 26. A pushing pawl 16 is rotatably installed at the rear end edge of the turntable 7. The turntable 7 serves to carry the pushing pawl 16. The pushing pawl 16 abuts against the front ratchet wheel 15. The cooperation between the front ratchet wheel 15 and the pushing pawl 16 can keep the cylinder body part of the cylinder body 1 stationary when the piston rod extends, and can move the cylinder body part of the cylinder body 1 forward when the piston rod retracts. A front gear 25 is coaxially embedded on the outer surface of the second shaft 26. A front rack 12 meshes with the lower part of the front gear 25. The cooperation between the front gear 25 and the front rack 12 serves to rotate the turntable 7. The front rack 12 is connected to the piston rod of the cylinder body 1. A rail clamping member is arranged in the middle of the cylinder seat 9. A flow control member is arranged at the oil port of the cylinder body 1. A push cap 2 is fixedly installed at the end of the piston rod of the cylinder body 1. The push cap 2 serves to increase the contact surface.

[0019] A T-shaped seat 20 is fixedly installed at the lower end of the shaft frame 8. The front rack 12 is slidably installed on the outer surface of the T-shaped seat 20. The T-shaped seat 20 serves to guide the front rack 12. A synchronous frame 6 is fixedly installed at the end of the front rack 12. The end of the synchronous frame 6 is fixed to the piston rod of the cylinder body 1. The synchronous frame 6 serves to fix the front rack 12 and the piston rod together.

[0020] A top pawl spring 17 is fixedly installed at the rear end edge of the turntable 7. The top pawl spring 17 serves to keep the pushing pawl 16 always in contact with the front ratchet wheel 15. A connecting head 18 is fixedly installed at the end of the top pawl spring 17. The connecting head 18 is rotatably connected to the pushing pawl 16. The connecting head 18 serves to connect the top pawl spring 17 and the pushing pawl 16.

[0021] The rail clamping member includes a threaded rod 10 rotatably installed through the middle of the cylinder seat 9. The threads at both ends of the threaded rod 10 are symmetrically arranged, enabling the threaded sleeves 27 to move towards each other. Threaded sleeves 27 are screwed onto both ends of the threaded rod 10. A rail clamping seat 11 is fixedly installed at the lower end of the threaded sleeve 27. Positioning wheels 32 are elastically installed at both ends of the rail clamping seat 11. Rotate the threaded rod 10 to drive the two threaded sleeves 27 to move towards each other, thereby driving the two rail clamping seats 11 to move towards each other. When the positioning wheels 32 on the rail clamping seats 11 are in contact with the ground rail 36, continue to rotate the threaded rod 10 to make the two rail clamping seats 11 continue to move towards each other. At this time, the adaptive spring 30 deforms, enabling the two rail clamping seats 11 to continue to move towards each other to clamp onto the ground rail 36 to fix the oil cylinder body 1.

[0022] Limit brackets 28 are provided on both sides of the threaded rod 10. The ends of the limit brackets 28 are fixed to the cylinder seat 9. The threaded sleeve 27 is slidably installed on the outer surface of the limit bracket 28. The limit bracket 28 serves to prevent the threaded sleeve 27 from rotating. Six-sided guide posts 29 are slidably installed through both ends of the rail clamping seat 11. A wheel seat 31 is fixedly installed at the end of the six-sided guide post 29. The six-sided guide post 29 serves to guide the wheel seat 31. The positioning wheel 32 is installed inside the wheel seat 31. The wheel seat 31 serves to carry the positioning wheel 32. An adaptive spring 30 is wound around the outer side of the six-sided guide post 29. The two ends of the adaptive spring 30 are respectively fixed to the wheel seat 31 and the rail clamping seat 11. When the positioning wheel 32 is in contact with the ground rail 36, the adaptive spring 30 will deform, enabling the two rail clamping seats 11 to continue to move towards each other to clamp onto the ground rail 36 to fix the oil cylinder body 1.

[0023] The flow control member includes a connecting pipe 3 fixedly installed at the oil port of the oil cylinder body 1. External threads are provided at the end of the connecting pipe 3 for easy connection to an external oil pipe. Since this connection method is a prior art and has been widely used, it is not elaborated in detail here and is not shown in the figure. A flow control ball 22 is fitted inside the connecting pipe 3. The flow control ball 22 serves to accelerate and slow down the movement stroke of the piston rod. A control rod 21 extends from the side of the flow control ball 22 and passes through the outer surface of the connecting pipe 3. The control rod 21 serves to drive the flow control ball 22 to rotate. The control rod 21 is rotatably engaged with the connecting pipe 3. A control flap 34 extends obliquely from the end of the control rod 21. Two fixing brackets 4 are symmetrically and fixedly installed at the upper end of one of the rail clamping seats 11. A control top plate 5 is inlaid through the end of the fixing bracket 4. The fixing bracket 4 serves to fix the control top plate 5. The end of the control top plate 5 abuts against the control flap 34. The control top plate 5 can toggle the control flap 34, thereby driving the control rod 21 to rotate.

[0024] An extension frame 19 is extended from the outer surface of the connecting pipe 3, and a positioning cap 35 is fixedly installed at the end of the extension frame 19. The extension frame 19 serves to fix the positioning cap 35. A reset torsion spring 33 is arranged between the outer surface of the control rod 21 and the outer surface of the connecting pipe 3. When the reset torsion spring 33 gradually restores its deformation to twist the control rod 21 to reset it, the positioning cap 35 will press the control paddle 34 to position the reset angle of the control rod 21, thereby ensuring that after resetting, the large hole 24 on the flow control ball 22 faces upward.

[0025] The upper and lower end surfaces of the flow control ball 22 are evenly distributed with a plurality of small holes 23, which can increase the resistance to the flow of the hydraulic oil, thereby slowing down the extension stroke of the piston rod so that it can stably push the goods. The front and rear ends of the flow control ball 22 are penetrated with large holes 24, which can allow the hydraulic oil to flow smoothly, thereby accelerating the retraction stroke of the piston rod, shortening the time and improving work efficiency.

[0026] During operation, place the cylinder body 1 on the ground rail 36. At this time, the forward moving wheels 13 are in contact with the ground rail 36. Then, rotate the threaded rod 10 to drive the two threaded sleeves 27 to move towards each other, thereby driving the two rail clamping seats 11 to move towards each other. When the positioning wheels 32 on the rail clamping seats 11 are in contact with the ground rail 36, continue to rotate the threaded rod 10 to make the two rail clamping seats 11 continue to move towards each other. At this time, adapt to the deformation of the spring 30 so that the two rail clamping seats 11 can continue to move towards each other to clamp on the ground rail 36 to fix the cylinder body 1. During this process, the control top plate 5 will move synchronously with the rail clamping seat 11 to toggle the control paddle 34, causing the control rod 21 to rotate, thereby driving the flow control ball 22 to rotate inside the connecting pipe 3, making the small hole 23 on the flow control ball 22 face upwards. Subsequently, the hydraulic oil enters the connecting pipe 3 and flows into the cylinder body 1 through the small hole 23 on the flow control ball 22, thereby increasing the resistance of the hydraulic oil flow, slowing down the extending stroke of the piston rod, and using the slowly extending piston rod to push the goods on the ground rail 36, making the goods move slowly and stably. During this process, the forward moving toothed plate 12 will be driven by the piston rod to move synchronously to drive the forward moving gear 25 to rotate, thereby driving the pushing pawl 16 on the turntable 7 to rotate on the outer surface of the forward moving ratchet 15. When a single pushing stroke is completed, the threaded rod 10 can be rotated in the reverse direction to make the clamped rail clamping seats 11 disengage from the ground rail 36. At this time, the rail clamping seats 11 will drive the control top plate 5 to gradually disengage from the control paddle 34. At this time, the reset torsion spring 33 will gradually recover its deformation to twist the control rod 21 to reset it, making the large hole 24 on the flow control ball 22 face upwards, enabling the smooth flow of the hydraulic oil to accelerate the retracting stroke of the piston rod. When the piston rod retracts, the forward moving toothed plate 12 will move in the reverse direction, thereby driving the forward moving gear 25 to rotate in the reverse direction. At this time, the pushing pawl 16 on the turntable 7 will abut against the forward moving ratchet 15 to push the forward moving ratchet 15, causing the first shaft 14 to rotate, thereby driving the forward moving wheels 13 to roll on the ground rail 36, moving the cylinder body part of the cylinder body 1 forward. At this time, the positioning wheels 32 roll on both sides of the ground rail 36 to guide the cylinder body 1. When the forward movement of the cylinder body part of the cylinder body 1 is completed, the above steps can be repeated to make the rail clamping seats 11 clamp on the ground rail 36 again and make the piston rod extend to push the goods on the ground rail 36 again, and so on in a cycle.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with a buffer structure, comprising a cylinder body (1), characterized in that: A cylinder base (9) is fixedly installed at the lower end of the cylinder body (1). Front wheels (13) are installed at both ends of the cylinder base (9). A shaft frame (8) is fixedly installed near the edge at the front end of the cylinder base (9). A first shaft (14) is rotatably installed at the end of the shaft frame (8). A second shaft (26) is rotatably installed through the middle at the front end of the shaft frame (8). The second shaft (26) and the first shaft (14) are coaxially arranged. The rear end of the first shaft (14) is fixed to one of the front wheels (13). A front movement ratchet wheel (15) is coaxially embedded at the front end of the first shaft (14). A turntable (7) is coaxially embedded at the rear end of the second shaft (26). A pushing pawl (16) is rotatably installed at the rear end edge of the turntable (7). The pushing pawl (16) abuts against the front movement ratchet wheel (15). A front movement gear (25) is coaxially embedded on the outer surface of the second shaft (26). A front movement toothed plate (12) is engaged with the lower part of the front movement gear (25). The front movement toothed plate (12) is connected to the piston rod of the cylinder body (1). A rail clamping member is arranged in the middle of the cylinder base (9). A flow control member is arranged at the oil port of the cylinder body (1). A push cap (2) is fixedly installed at the end of the piston rod of the cylinder body (1).

2. A hydraulic cylinder with a buffer structure according to claim 1, characterized in that: A T-shaped seat (20) is fixedly installed at the lower end of the shaft frame (8). The front movement toothed plate (12) is slidably installed on the outer surface of the T-shaped seat (20). A synchronizing frame (6) is fixedly installed at the end of the front movement toothed plate (12). The end of the synchronizing frame (6) is fixed to the piston rod of the cylinder body (1).

3. A hydraulic cylinder with a buffer structure according to claim 1, characterized in that: A top pawl spring (17) is fixedly installed at the rear end edge of the turntable (7). A connecting head (18) is fixedly installed at the end of the top pawl spring (17). The connecting head (18) is rotatably connected to the pushing pawl (16).

4. A hydraulic cylinder with a buffer structure according to claim 1, characterized in that: The rail clamping member includes a threaded rod (10) rotatably installed through the middle of the cylinder base (9). The threads at both ends of the threaded rod (10) are symmetrically arranged. Threaded sleeves (27) are screwed onto both ends of the threaded rod (10). A rail clamping seat (11) is fixedly installed at the lower end of the threaded sleeve (27). Positioning wheels (32) are elastically installed at both ends of the rail clamping seat (11).

5. A hydraulic cylinder with a buffer structure according to claim 4, characterized in that: Restricting frames (28) are arranged on both sides of the threaded rod (10). The ends of the restricting frames (28) are fixed to the cylinder base (9). The threaded sleeves (27) are slidably installed on the outer surfaces of the restricting frames (28). Hexagonal guide columns (29) are slidably installed through both ends of the rail clamping seat (11). A wheel seat (31) is fixedly installed at the end of the hexagonal guide column (29). The positioning wheel (32) is installed inside the wheel seat (31). An adapting spring (30) is wound around the outer side of the hexagonal guide column (29). Both ends of the adapting spring (30) are fixed to the wheel seat (31) and the rail clamping seat (11) respectively.

6. A hydraulic cylinder with a buffer structure according to claim 4, characterized in that: The flow control member includes a connecting pipe (3) fixedly installed at the oil port of the oil cylinder body (1). A flow control ball (22) is fitted and installed inside the connecting pipe (3). A control rod (21) extends from the side surface of the flow control ball (22). The control rod (21) penetrates out from the outer surface of the connecting pipe (3). The control rod (21) is rotationally matched with the connecting pipe (3). A control dial (34) extends obliquely at the end of the control rod (21). Two fixing brackets (4) are symmetrically and fixedly installed at the upper end of one of the rail clamping seats (11). A control top plate (5) is penetrated and inlaid at the end of the fixing bracket (4). The end of the control top plate (5) abuts against the control dial (34).

7. A hydraulic cylinder with a buffer structure according to claim 6, characterized in that: An extension bracket (19) extends from the outer surface of the connecting pipe (3). A positioning cap (35) is fixedly installed at the end of the extension bracket (19). A return torsion spring (33) is arranged between the outer surface of the control rod (21) and the outer surface of the connecting pipe (3).

8. A hydraulic cylinder with a buffer structure according to claim 6, characterized in that: A plurality of small holes (23) are uniformly distributed and penetrated through the upper and lower end faces of the flow control ball (22). A large hole (24) is penetrated through the front and rear ends of the flow control ball (22).

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