Floating type buffering oil cylinder

Abstract

The utility model relates to the technical field of oil cylinders, in particular to a floating type buffering oil cylinder which comprises a base, a cylinder body and a top cover and further comprises a connecting mechanism and a buffering mechanism, the cylinder body is installed at the top end of the base, the top cover is installed at the top end of the cylinder body, a first oil pipe is connected to the side face of the base, and a second oil pipe is connected to the side face of the base. A second oil pipe is connected to the side face of the top cover, a piston rod penetrates through the interior of the cylinder body, and a piston is installed at the bottom end of the surface of the piston rod. Buffering is conducted through the elastic sponge and the second spring, oil immersed in the elastic sponge is continuously sprayed outwards from the oil hole, and therefore the piston rod is buffered again, and the buffering performance of the piston rod can be improved; in the process that the piston moves along with the piston rod, after the piston is abraded, the abraded piston can be detached and replaced with a new piston, and the performance of the oil cylinder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to a floating buffer oil cylinder. Background Art

[0002] A hydraulic cylinder is an actuator in a hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. A hydraulic motor realizes continuous rotary motion, while a hydraulic cylinder realizes reciprocating motion.

[0003] The structural forms of hydraulic cylinders are mainly divided into three categories: piston cylinders, plunger cylinders, and swing cylinders. Piston cylinders and plunger cylinders realize reciprocating linear motion, outputting speed and thrust. Swing cylinders realize reciprocating swing, outputting angular velocity (rotational speed) and torque. In addition to being used individually, hydraulic cylinders can also be combined in two or more numbers or combined with other mechanisms to complete special functions. Hydraulic cylinders have a simple structure and reliable operation, and are widely used in the hydraulic systems of machine tools.

[0004] For example, in the prior art, Chinese Patent Publication No. "CN216922686U" provides a floating buffer hydraulic cylinder, including an outer cylinder body. The outer cylinder body is provided with a tubing connection ring, on which a front-end tubing is arranged. A tail-end tubing is arranged on the outer cylinder body. An outer reinforcement ring is fixedly installed on the outer cylinder body. A guide rod is arranged on the outer cylinder body. A connection ring is fixedly installed on the outside of the outer cylinder body.

[0005] Through the provided floating buffer hydraulic cylinder, when the piston main rod moves, it drives the operation of the device. When the piston main rod is damaged, the floating reciprocating rod can be used to drive the operation. Moreover, the structure is simple and it is easy to play a role in secondary prevention. This device protects the piston main rod in all aspects, achieving a buffering effect. The cooperation between various components reduces the buffering gap, has good mobility, a long activity time, and a more durable and wear-resistant service life.

[0006] For the existing floating buffer oil cylinder, the buffer structure at the bottom end inside the oil cylinder is relatively single, only buffering through a spring. The buffering ability is insufficient. Moreover, after being squeezed multiple times, the elastic performance of the spring becomes poor and the elasticity decreases, resulting in a reduction in the buffering ability of the piston rod. Moreover, during the telescopic movement of the piston rod inside the cylinder body, friction will occur between the piston and the inner wall of the cylinder body, resulting in wear of the piston, making the performance of the oil cylinder insufficient and making it inconvenient to replace and maintain the piston. Summary of the Utility Model

[0007] The purpose of the present utility model is to solve the drawbacks existing in the prior art that the buffer structure at the bottom end inside the oil cylinder is relatively single, only buffered by a spring, with insufficient buffering capacity. Moreover, after being squeezed multiple times, the elastic performance of the spring deteriorates and its elasticity decreases, resulting in a reduction in the buffering capacity of the piston rod, and to propose a floating buffer oil cylinder.

[0008] To achieve the above purpose, the present utility model provides the following technical solutions:

[0009] Design a floating buffer oil cylinder, including a base, a cylinder body and a top cover, characterized in that: it further includes a connection mechanism and a buffer mechanism. The cylinder body is installed at the top end of the base, the top cover is installed at the top end of the cylinder body. A first oil pipe is connected to the side of the base, a second oil pipe is connected to the side of the top cover. A piston rod passes through the inside of the cylinder body, and a piston is installed at the bottom end surface of the piston rod. The connection mechanism includes a connection sleeve, the connection sleeve is sleeved on the bottom end surface of the piston rod. First connection holes are opened at the top end and the bottom end surfaces of the connection sleeve. Second connection holes are opened on the surface of the piston rod. A connection column is inserted into the inside of the first connection hole and the second connection hole. An installation hole is opened in the middle of the piston. The piston rod and the connection sleeve pass through the installation hole. Sealing gaskets are sleeved at both ends of the installation hole on the surface of the connection sleeve. A sealing plug is connected to the inner side of the sealing gasket. The sealing plug is inserted into both ends of the installation hole. A pressing piece is arranged on the outer side of the sealing gasket, and a nut is arranged on the outer side of the pressing piece. The buffer mechanism includes a top pressure block and a buffer box. The top pressure block is located directly above the buffer box. The buffer box is fixed at the top end of the base. An elastic sealing layer is connected to the top end of the buffer box. A movable sealing plate is installed in the middle of the inside of the buffer box. A movable bearing plate is arranged at the top end of the movable sealing plate. A buffer column is connected between the movable bearing plate and the movable sealing plate. A first spring is sleeved on the surface of the buffer column. An elastic sponge layer is arranged at the bottom end of the movable sealing plate. A spring groove is opened in the middle of the elastic sponge layer. A second spring is arranged inside the spring groove. An oil hole is opened at the bottom end inside the buffer box.

[0010] Further, the outer surface of the connection sleeve is an external thread structure. The connection sleeve is a cylindrical structure and is detachably sleeved and connected to the piston rod.

[0011] Further, the second connection hole is a threaded hole structure. The connection column is a threaded column structure and its outer end does not protrude from the outer end of the first connection hole.

[0012] Further, the nut is sleeved on the surface of the connection sleeve and presses the pressing piece and the sealing gasket. Both the sealing gasket and the sealing plug are made of sealing rubber material.

[0013] Furthermore, the pressing block is an arc-shaped convex structure and is made of elastic rubber material. The buffer box is a circular box structure, and the movable sealing plate and the movable bearing plate are slidably and sealingly connected to the inner surface of the buffer box.

[0014] Furthermore, the movable bearing plate is located at the bottom end of the elastic sealing layer, and the second spring is connected to the bottom end of the movable sealing plate.

[0015] Furthermore, the oil holes are uniformly arranged on the outer side of the buffer box and communicate with the inside of the cylinder block.

[0016] A floating buffer oil cylinder proposed by the present utility model has the following beneficial effects:

[0017] 1. In the present utility model, a connecting sleeve is sleeved on the bottom surface of the piston rod, and a pressing block is arranged at the bottom end of the connecting sleeve. Moreover, a buffer box is fixed on the base located at the bottom end of the pressing block. Moreover, an elastic sealing layer is arranged at the top end of the buffer box, and a primary buffer combination composed of a movable bearing plate, a buffer column, a first spring and a movable sealing plate is arranged inside the buffer box. A second spring and an elastic sponge layer are arranged at the bottom end of the movable sealing plate, and oil holes are arranged at the bottom end inside the buffer box. In this way, when the oil cylinder is used and buffered, the piston rod drives the pressing block downward, presses the elastic sealing layer, and presses into the buffer box. The movable bearing plate is pressed. First, buffering is carried out through the pressing block, the buffer column and the first spring. Then the piston rod continues to press downward, and buffering is carried out through the elastic sponge layer and the second spring. And the oil liquid immersed in the elastic sponge layer continuously sprays out from the oil holes, thereby buffering the piston rod again. Therefore, the buffering performance of the piston rod can be improved.

[0018] 2. An installation hole is arranged in the middle of the piston of the present utility model. After the connecting sleeve is sleeved on the surface of the piston rod, it passes through the installation hole, and gaskets and sealing plugs are arranged on both sides of the installation hole, and are tightened by nuts and pressing pieces, so as to maintain a detachable and tight and sealed installation connection between the piston and the piston rod. In this way, when the piston wears during the movement along with the piston rod, the worn piston can be disassembled and a new piston can be replaced to improve the performance of the oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is of the present utility model Figure 1 an enlarged view of part A;

[0021] Figure 3 is of the present utility model Figure 1 an enlarged view of part B;

[0022] Figure 4For the present utility model Figure 1 Schematic diagram of the partial structure of the buffer box;

[0023] Figure 5 For the present utility model Figure 1 Schematic diagram of the partial structure of the connecting sleeve.

[0024] In the figure: 1. Base; 2. First oil pipe; 3. Jacking block; 4. Nut; 5. Piston; 6. Pressing piece; 7. Cylinder block; 8. Piston rod; 9. Top cover; 10. Second oil pipe; 11. Elastic sponge layer; 12. Oil hole; 13. Second spring; 14. Spring groove; 15. Buffer box; 16. Movable sealing plate; 17. First spring; 18. Movable bearing plate; 19. Buffer column; 20. Elastic sealing layer; 21. Mounting hole; 22. Sealing plug; 23. Sealing gasket; 24. Connecting sleeve; 25. First connection hole; 26. Second connection hole; 27. Connecting column. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] Embodiment 1

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5, A floating buffer oil cylinder in the illustration, comprising a base 1, a cylinder body 7 and a top cover 9, characterized in that: it further comprises a connecting mechanism and a buffer mechanism. The cylinder body 7 is installed at the top end of the base 1, the top cover 9 is installed at the top end of the cylinder body 7, a first oil pipe 2 is connected to the side of the base 1, a second oil pipe 10 is connected to the side of the top cover 9, a piston rod 8 passes through the inside of the cylinder body 7, and a piston 5 is installed at the bottom end of the surface of the piston rod 8. The buffer mechanism comprises a pressing block 3 and a buffer box 15. The pressing block 3 is located directly above the buffer box 15. The buffer box 15 is fixed at the top end of the base 1. The top end of the buffer box 15 is connected with an elastic sealing layer 20, which can keep the upper part of the movable sealing plate 16 in the buffer box 15 relatively sealed. After being pressed by the pressing block 3, it can elastically stretch and expand; an movable sealing plate 16 is installed in the middle of the buffer box 15, an movable bearing plate 18 is arranged at the top end of the movable sealing plate 16, a buffer column 19 is connected between the movable bearing plate 18 and the movable sealing plate 16, and a first spring 17 is sleeved on the surface of the buffer column 19. In this way, the movable bearing plate 18, the buffer column 19, the first spring 17 and the movable sealing plate 16 form a buffer structure to buffer the piston rod 8 once; an elastic sponge layer 11 is arranged at the bottom end of the movable sealing plate 16, the elastic sponge layer 11 is immersed with oil, a spring groove 14 is opened in the middle of the elastic sponge layer 11, a second spring 13 is arranged inside the spring groove 14, an oil hole 12 is opened at the inner bottom end of the buffer box 15. When the elastic sponge layer 11 is pressed downward by the piston rod 8 and the movable sealing plate 16, the immersed oil is extruded, and the oil is sprayed out from the oil hole 12, so as to cooperate with the second spring 13 and the elastic sponge layer 11 to buffer the piston rod 8 twice.

[0028] In this way, when the oil cylinder is used and buffered, the piston rod 8 drives the pressing block 3 downward, presses the elastic sealing layer 20, and presses into the buffer box 15, presses the movable bearing plate 18. First, it is buffered by the pressing block 3, the buffer column 19 and the first spring 17. Then the piston rod 8 continues to press downward, and is buffered by the elastic sponge layer 11 and the second spring 13. And the oil immersed in the elastic sponge layer 11 continuously sprays out from the oil hole 12, so as to buffer the piston rod 8 again, thus improving the buffering performance of the piston rod 8.

[0029] Furthermore, the pressing block 3 is of an arc-shaped convex structure and is made of elastic rubber material. The buffer box 15 is of a circular box structure. The movable sealing plate 16 and the movable bearing plate 18 are slidably and sealingly connected to the inner surface of the buffer box 15.

[0030] Further, the movable bearing plate 18 is located at the bottom end of the elastic sealing layer 20, and the second spring 13 is connected to the bottom end of the movable sealing plate 16.

[0031] Further, the oil holes 12 are uniformly arranged on the outer side of the buffer box 15 and communicate with the inside of the cylinder block 7, so that the oil enters and exits the buffer box 15, facilitating the immersion of the elastic sponge layer 11 in the middle with oil to enhance the buffering performance.

[0032] Embodiment 2

[0033] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ,as shown in the figure, a floating buffer oil cylinder, including a base 1, a cylinder block 7 and a top cover 9, characterized in that: it further includes a connecting mechanism and a buffering mechanism, the cylinder block 7 is installed at the top end of the base 1, the top cover 9 is installed at the top end of the cylinder block 7, a first oil pipe 2 is connected to the side of the base 1, a second oil pipe 10 is connected to the side of the top cover 9, a piston rod 8 passes through the inside of the cylinder block 7, a piston 5 is installed at the bottom end surface of the piston rod 8, the connecting mechanism includes a connecting sleeve 24, the connecting sleeve 24 is sleeved on the bottom end surface of the piston rod 8, first connecting holes 25 are opened at the top end and the bottom end surfaces of the connecting sleeve 24, a second connecting hole 26 is opened on the surface of the piston rod 8, a connecting column 27 is inserted into the inside of the first connecting hole 25 and the second connecting hole 26, an installation hole 21 is opened in the middle of the piston 5, the piston rod 8 and the connecting sleeve 24 pass through the installation hole 21, sealing gaskets 23 are sleeved on both ends of the connecting sleeve 24 and located at both ends of the installation hole 21, a sealing plug 22 is connected to the inner side of the sealing gasket 23, the sealing plug 22 is inserted into both ends of the installation hole 21, a pressing piece 6 is arranged on the outer side of the sealing gasket 23, a nut 4 is arranged on the outer side of the pressing piece 6, the buffering mechanism includes a pressing block 3 and a buffer box 15, the pressing block 3 is located directly above the buffer box 15, the buffer box 15 is fixed at the top end of the base 1, an elastic sealing layer 20 is connected to the top end of the buffer box 15, a movable sealing plate 16 is installed in the middle of the buffer box 15, a movable bearing plate 18 is arranged at the top end of the movable sealing plate 16, a buffer column 19 is connected between the movable bearing plate 18 and the movable sealing plate 16, a first spring 17 is sleeved on the surface of the buffer column 19, an elastic sponge layer 11 is arranged at the bottom end of the movable sealing plate 16, a spring groove 14 is opened in the middle of the elastic sponge layer 11, a second spring 13 is arranged inside the spring groove 14, and an oil hole 12 is opened at the inner bottom end of the buffer box 15.

[0034] In this way, during the movement of the piston 5 along with the piston rod 8, after wear occurs, the worn piston 5 can be disassembled and a new piston 5 can be replaced, improving the performance of the oil cylinder.

[0035] Furthermore, the outer surface of the connecting sleeve 24 has an external thread structure. The connecting sleeve 24 is of a cylindrical structure and is detachably sleeved and connected to the piston rod 8.

[0036] Furthermore, the second connecting hole 26 is of a threaded hole structure, the connecting post 27 is of a threaded post structure, and the outer end does not protrude beyond the outer end of the first connecting hole 25.

[0037] Furthermore, the nut 4 is sleeved on the surface of the connecting sleeve 24 and presses the pressing piece 6 and the sealing gasket 23. The buffer post 19 is made of elastic rubber material, and both the sealing gasket 23 and the sealing plug 22 are made of sealing rubber material.

[0038] Working mode: By sleeving the connecting sleeve 24 on the bottom surface of the piston rod 8 and arranging the pressing block 3 at the bottom end of the connecting sleeve 24. Moreover, a buffer box 15 is fixed on the base 1 located at the bottom end of the pressing block 3. And an elastic sealing layer 20 is arranged at the top end of the buffer box 15. A primary buffer combination composed of a movable bearing plate 18, a buffer post 19, a first spring 17 and a movable sealing plate 16 is arranged inside the buffer box 15. And a second spring 13 and an elastic sponge layer 11 are arranged at the bottom end of the movable sealing plate 16. And an oil hole 12 is arranged at the bottom end inside the buffer box 15. In this way, when the oil cylinder is in use and buffering is carried out, the piston rod 8 drives the pressing block 3 downward, presses the elastic sealing layer 20, and presses into the inside of the buffer box 15, pressing the movable bearing plate 18. First, buffering is carried out through the pressing block 3, the buffer post 19 and the first spring 17. Then the piston rod 8 continues to press downward, and buffering is carried out through the elastic sponge layer 11 and the second spring 13. And the oil liquid immersed inside the elastic sponge layer 11 continuously sprays out from the oil hole 12, thereby buffering the piston rod 8 again, so that the buffering performance of the piston rod 8 can be improved.

[0039] An installation hole 21 is arranged in the middle of the piston 5. After the connecting sleeve 24 is sleeved on the surface of the piston rod 8, it passes through the installation hole 21, and sealing gaskets 23 and sealing plugs 22 are arranged on both sides of the installation hole 21, and are pressed by the nut 4 and the pressing piece 6, so as to maintain a detachable and tight and sealed installation connection between the piston 5 and the piston rod 8. In this way, during the movement of the piston 5 along with the piston rod 8, after wear occurs, the worn piston 5 can be disassembled and a new piston 5 can be replaced, improving the performance of the oil cylinder.

[0040] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A floating buffer oil cylinder, comprising a base (1), a cylinder block (7) and a top cover (9), characterized in that: It also includes a connection mechanism and a buffer mechanism; Base (1), the cylinder block (7) is installed at the top end of the base (1), the top cover (9) is installed at the top end of the cylinder block (7), the first oil pipe (2) is connected to the side of the base (1), the second oil pipe (10) is connected to the side of the top cover (9), the piston rod (8) passes through the inside of the cylinder block (7), and a piston (5) is installed at the bottom end surface of the piston rod (8); Connection mechanism, the connection mechanism includes a connection sleeve (24), the connection sleeve (24) is sleeved on the bottom end surface of the piston rod (8), the first connection holes (25) are opened at the top and bottom ends of the surface of the connection sleeve (24), the second connection hole (26) is opened on the surface of the piston rod (8), a connection column (27) is inserted into the inside of the first connection hole (25) and the second connection hole (26), an installation hole (21) is opened in the middle of the piston (5), the piston rod (8) and the connection sleeve (24) pass through the installation hole (21), sealing gaskets (23) are sleeved at both ends of the surface of the connection sleeve (24) and located at both ends of the installation hole (21), a sealing plug (22) is connected to the inner side of the sealing gasket (23), the sealing plug (22) is inserted into both ends of the installation hole (21), a pressing piece (6) is arranged on the outer side of the sealing gasket (23), and a nut (4) is arranged on the outer side of the pressing piece (6); Buffer mechanism, the buffer mechanism includes a top pressing block (3) and a buffer box (15), the top pressing block (3) is located directly above the buffer box (15), the buffer box (15) is fixed at the top end of the base (1), an elastic sealing layer (20) is connected to the top end of the buffer box (15), a movable sealing plate (16) is installed in the middle of the inside of the buffer box (15), a movable bearing plate (18) is arranged at the top end of the movable sealing plate (16), a buffer column (19) is connected between the movable bearing plate (18) and the movable sealing plate (16), a first spring (17) is sleeved on the surface of the buffer column (19), an elastic sponge layer (11) is arranged at the bottom end of the movable sealing plate (16), a spring groove (14) is opened in the middle of the elastic sponge layer (11), a second spring (13) is arranged inside the spring groove (14), and an oil hole (12) is opened at the inner bottom end of the buffer box (15).

2. The floating buffer oil cylinder according to claim 1, characterized in that: The outer surface of the connection sleeve (24) is of an external thread structure, the connection sleeve (24) is of a cylindrical structure and is detachably sleeved and connected to the piston rod (8).

3. A floating buffer oil cylinder according to claim 1, characterized in that: The second connection hole (26) is of a threaded hole structure, the connection column (27) is of a threaded column structure, and the outer end does not protrude from the outer end of the first connection hole (25).

4. A floating buffer oil cylinder according to claim 1, characterized in that: The nut (4) is sleeved on the surface of the connection sleeve (24) and presses the pressing piece (6) and the sealing gasket (23), and both the sealing gasket (23) and the sealing plug (22) are made of sealing rubber material.

5. A floating buffer oil cylinder according to claim 1, wherein: The top pressing block (3) is of an arc-shaped convex structure and is made of elastic rubber material. The buffer box (15) is of a circular box structure. The movable sealing plate (16) and the movable bearing plate (18) are slidably and sealingly connected to the inner surface of the buffer box (15).

6. The floating buffer oil cylinder according to claim 1, characterized in that: The movable bearing plate (18) is located at the bottom end of the elastic sealing layer (20), and the second spring (13) is connected to the bottom end of the movable sealing plate (16).

7. A floating buffer oil cylinder according to claim 1, characterized in that: The oil holes (12) are uniformly arranged on the outer side of the buffer box (15) and communicate with the inside of the cylinder block (7).

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