Self-locking buffer type hydraulic oil cylinder
By setting buffer channels and control components in the hydraulic cylinder, the buffer chamber is self-locking and hydraulic pressure relief, which solves the problem of poor buffering performance of the hydraulic cylinder and improves service life and efficiency.
Patent Information
- Application Number
- CN202422272814.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-18
AI Technical Summary
The buffering performance of existing hydraulic cylinders is poor, and excessive pressure of the hydraulic cylinder will affect its service life.
The buffer channel and control components are arranged in the cylinder, including a positioning shaft, a rotating sleeve, a curved rotating seat, a curved slide rod and a ball plug. Through the cooperation of the torsion spring and return spring, the self-locking of the buffer cavity and the pressure relief buffering of the oil pressure are achieved.
It effectively improves the buffering performance of the hydraulic cylinder, extends the service life, ensures the quality and efficiency of use, and facilitates the cleaning and maintenance of the buffer chamber.
Smart Images
Figure CN223075891U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hydraulic cylinders, and particularly relates to a self-locking buffer hydraulic cylinder. Background Art
[0002] The working principle of a hydraulic cylinder is based on hydraulic transmission, and power is transmitted through the pressure inside the hydraulic oil. The output force of the hydraulic cylinder is proportional to the effective area of the piston and the pressure difference on both sides. The core components of a hydraulic cylinder include a cylinder barrel, a cylinder head, a piston, a piston rod, a sealing device, a buffer device, and an exhaust device. Among them, the buffer device and the exhaust device depend on the specific application scenarios, while the other components are essential parts.
[0003] The function of a hydraulic cylinder is to convert hydraulic energy into mechanical energy. It is an energy conversion device that converts hydraulic energy into mechanical energy of reciprocating linear motion. Traditional buffer hydraulic cylinders can basically meet people's usage requirements, but there are still certain problems. In the prior art, the buffer performance of hydraulic cylinders is poor, and excessive pressure in the hydraulic cylinder will greatly affect the service life of the hydraulic cylinder, which is very inconvenient. Content of the Utility Model
[0004] The purpose of the utility model is to provide a self-locking buffer hydraulic cylinder, with a wonderful structure, which can buffer the oil pressure in the cylinder body in time when the oil pressure in the cylinder body is too large, and at the same time realize the self-locking of the buffer cavity when there is no need to relieve pressure, which is convenient and practical.
[0005] The technical solution for achieving the object of the present utility model is as follows: The present utility model has a cylindrical cylinder block and a cylinder head installed on a rod body. The cylinder block is provided with an oil inlet and an oil outlet. A piston plate coaxial with the cylinder block is arranged inside the cylinder block. A piston rod coaxial with the piston plate is arranged on the piston plate. One end of the piston rod is fixed on the piston plate, and the other end of the piston rod passes through the cylinder block and is slidably connected with the cylinder block. An inner cavity is arranged inside the cylinder block. The inner cavity is divided into a first oil inlet cavity and a second oil inlet cavity by the piston plate. A buffer channel capable of communicating the first oil inlet cavity and the second oil inlet cavity is arranged on the inner wall of the cylinder block. The buffer channel includes an oil inlet channel communicating with the first oil inlet cavity, a buffer cavity, and an oil outlet channel communicating with the second oil inlet cavity. A control valve capable of controlling the opening and closing of the buffer channel is arranged on the oil inlet channel. A control component capable of controlling the synchronous on-off of the buffer cavity with the first oil inlet cavity and the second oil inlet cavity is arranged inside the buffer cavity. The control component includes a positioning shaft fixed inside the buffer cavity, a rotating sleeve sleeved on the positioning shaft and rotatably connected with the positioning shaft, arc-shaped rotating seats symmetrically arranged on the outer wall of the rotating sleeve along the axis center of the positioning shaft, arc-shaped sliding rods slidably arranged on each arc-shaped rotating seat, and ball plugs fixed on each arc-shaped sliding rod and capable of synchronously opening and closing the oil inlet channel and the oil outlet channel. A torsion spring is arranged between the positioning shaft and the rotating sleeve, and both ends of the torsion spring act on the inner walls of the positioning shaft and the rotating sleeve respectively. Each arc-shaped rotating seat is provided with an arc-shaped chute adapted to the arc-shaped sliding rod. A return spring is sleeved on each arc-shaped sliding rod, and both ends of the return spring act on the arc-shaped sliding rod and the inner wall of the arc-shaped chute respectively. Each ball plug is pressed against the connection ends of the oil inlet channel and the oil outlet channel with the buffer cavity by the continuous force applied to the rotating sleeve by the torsion spring and the continuous force applied to the arc-shaped sliding rod by the return spring, and forms a self-locking of the buffer cavity.
[0006] Further, mounting blocks are arranged at both the upper and lower ends of the positioning shaft. The positioning shaft is fixedly arranged between the opposite mounting blocks. The outer diameter of the rotating sleeve is the same as that of the mounting blocks. A connection groove communicating with the buffer cavity is arranged on the outer wall of the cylinder block. A positioning block is hermetically installed in the connection groove. The positioning shaft is locked on the upper end face of the buffer cavity by a locking member. After the positioning block is inserted into the connection groove, it is fixed on the cylinder block by a locking member, and the positioning shaft is fixed in the buffer cavity by pressing against the mounting block at the lower end of the positioning shaft.
[0007] Further, a plurality of oil drainage channels and an oil discharge channel are arranged on the positioning block. One end of each oil drainage channel is arranged on the upper end face of the positioning block and communicates with the buffer cavity. The other ends of each oil drainage channel converge on the oil discharge channel. One end of the oil discharge channel communicates with each oil drainage channel, and the other end extends to the lower end face of the positioning block. A plug capable of blocking the oil discharge channel is also provided on the lower end face of the positioning block.
[0008] Further, a connecting convex ring is provided on the cylinder head, and an installation step adapted to the connecting convex ring is provided in the inner cavity of the cylinder block. A sealing ring is further provided between the connecting convex ring and the installation step. The cross section of the sealing ring is L-shaped. The sealing ring includes a bottom pressing part disposed at the bottom of the connecting convex ring and the installation step, and a side pressing part disposed between the connecting convex ring and the inner wall of the cylinder block. The bottom pressing part and the side pressing part are integrally formed. A first sealing ring coaxial with the sealing ring is provided at the left end of the bottom pressing part, and a second sealing ring coaxial with the sealing ring is provided at the right end of the bottom pressing part. The first sealing ring and the second sealing ring are arranged in a staggered manner, and the cross sections of the first sealing ring and the second sealing ring are both hemispherical. A first sealing groove adapted to the first sealing ring is provided on the connecting convex ring, and a second sealing groove adapted to the second sealing ring is provided on the installation step. After the connecting convex ring of the cylinder head extends into the inner cavity, the cylinder head forms a sealed connection with the installation adjustment through the cooperation of the first sealing ring and the first sealing groove, and the cooperation of the second sealing ring and the second sealing groove, and is fixed on the cylinder block through a locking member.
[0009] Further, shock pads are provided on both the left and right sides of the piston plate.
[0010] The utility model has positive effects: (1) By arranging a buffer channel on the inner wall of the cylinder block, arranging a buffer cavity in the buffer channel, and arranging a control component in the buffer cavity, each ball plug presses against the connection ends of the oil inlet channel and the oil outlet channel and the buffer cavity through the continuous force applied by the torsion spring to the rotating sleeve and the continuous force applied by the return spring to the arc-shaped slide rod, and forms self-locking of the buffer cavity. Similarly, the ball plug opens the oil inlet channel and the oil outlet channel at the same time by rotating the rotating sleeve, which is convenient for the first oil inlet cavity or the second oil inlet cavity to relieve pressure and buffer. It effectively solves the problem that the buffer performance of the hydraulic cylinder in the prior art is poor, and the excessive pressure of the hydraulic cylinder will greatly affect the service life of the hydraulic cylinder. It effectively ensures the efficient and stable use of the hydraulic cylinder and the overall service life of the hydraulic cylinder. The structure is ingenious, stable and practical.
[0011] (2) By arranging the installation block, while positioning and installing the positioning shaft, the arrangement of the positioning block can, on the one hand, facilitate the complete discharge of the residual liquid in the buffer cavity and the cleaning of the buffer cavity, and on the other hand, facilitate the later maintenance and replacement of parts in the buffer cavity. It is convenient and practical.
[0012] (3) By arranging a plurality of oil discharge channels and an oil drain channel on the positioning block, it can effectively ensure the discharge of the residual liquid in the buffer cavity, ensure the cleanliness of the buffer cavity, and lay a foundation for the efficient pressure relief and buffering in the buffer cavity. It is efficient and convenient.
[0013] (4) In the present utility model, a sealing ring is arranged between the connecting convex ring and the mounting step. After the cylinder head extends into the inner cavity, the cylinder head forms a sealed connection with the mounting adjustment through the cooperation of the first sealing ring and the first sealing groove, and the cooperation of the second sealing ring and the second sealing groove, effectively ensuring the sealing performance of the connection between the cylinder head and the cylinder block. At the same time, the first sealing ring and the second sealing ring arranged in a staggered manner effectively ensure the radial stability of the connection between the sealing ring and the mounting step, and at the same time, the locking member ensures the axial stability of the sealing ring.
[0014] (5) In the present utility model, shock-absorbing gaskets are arranged on both the left and right sides of the piston plate, effectively avoiding the collision between the piston plate and the inner wall of the cylinder block when the piston plate slides to the limit position, and further ensuring the safety and high efficiency of the piston plate during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to make the content of the present utility model easier to be clearly understood, the following further describes the present utility model in detail according to specific embodiments in conjunction with the drawings, where
[0016] Figure 1 is a cross-sectional view of the overall structure of the self-locking buffer hydraulic cylinder in the present utility model;
[0017] Figure 2 is Figure 1 an enlarged view of part A in
[0018] Figure 3 is Figure 1 an enlarged view of part B in
[0019] Figure 4 is a cross-sectional view of the overall structure of the control component in the present utility model;
[0020] Figure 5 is a cross-sectional view of the top view of the overall structure of the control component in the present utility model;
[0021] Figure 6 is a cross-sectional view of the overall structure of the cylinder head in the present utility model;
[0022] Figure 7 is a cross-sectional view of the overall structure of the sealing ring in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] See Figures 1 to 7, the utility model has a cylindrical cylinder block 1 and a cylinder head 2 installed on the rod body. The cylinder block 1 is provided with an oil inlet 11 and an oil outlet 12. A piston plate 3 coaxial with the cylinder block 1 is arranged inside the cylinder block 1. A piston rod 4 coaxial with the piston plate 3 is arranged on the piston plate 3. One end of the piston rod 4 is fixed on the piston plate 3, and the other end of the piston rod 4 passes through the cylinder block 1 and is slidably connected with the cylinder block 1. An inner cavity is arranged inside the cylinder block 1. The inner cavity is separated into a first oil inlet cavity 13 and a second oil inlet cavity 14 by the piston plate 3. A buffer channel for communicating the first oil inlet cavity 13 and the second oil inlet cavity 14 is arranged on the inner wall of the cylinder block 1. The buffer channel includes an oil inlet channel 15 communicating with the first oil inlet cavity 13, a buffer cavity 16, and an oil outlet channel 17 communicating with the second oil inlet cavity 14. A control valve 18 for controlling the opening and closing of the buffer channel is arranged on the oil inlet channel 15. A control component 7 for controlling the synchronous on-off of the buffer cavity 16 with the first oil inlet cavity 13 and the second oil inlet cavity 14 is arranged inside the buffer cavity. The control component 7 includes a positioning shaft 71 fixed inside the buffer cavity 16, a rotating sleeve 72 sleeved on the positioning shaft 71 and rotatably connected with the positioning shaft 71, arc-shaped rotating seats 75 symmetrically arranged on the outer wall of the rotating sleeve 72 along the axis of the positioning shaft 71, arc-shaped sliding rods 76 slidably arranged on each arc-shaped rotating seat 75, and ball plugs 77 fixed on each arc-shaped sliding rod 76 for synchronously opening and closing the oil inlet channel 15 and the oil outlet channel 17. A torsion spring 73 is arranged between the positioning shaft 71 and the rotating sleeve 72. The two ends of the torsion spring 73 respectively act on the inner walls of the positioning shaft 71 and the rotating sleeve 72. Each arc-shaped rotating seat 75 is provided with an arc-shaped sliding groove 741 adapted to the arc-shaped sliding rod 76. A return spring 742 is sleeved on each arc-shaped sliding rod 76. The two ends of the return spring 742 respectively act on the arc-shaped sliding rod 76 and the inner wall of the arc-shaped sliding groove 741. Each ball plug 77 is pressed against the connection ends of the oil inlet channel 15 and the oil outlet channel 17 with the buffer cavity 16 by the continuous force of the torsion spring 73 on the rotating sleeve 72 and the continuous force of the return spring 742 on the arc-shaped sliding rod 76, and forms self-locking of the buffer cavity 16.
[0024] Installation blocks 74 are arranged at the upper and lower ends of the positioning shaft 71. The positioning shaft 71 is fixedly arranged between the opposite installation blocks 74. The outer diameter of the rotating sleeve 72 is the same as the outer diameter of the installation blocks 74. A connection groove communicating with the buffer cavity 16 is arranged on the outer wall of the cylinder block 1. A positioning block 6 is hermetically installed in the connection groove. The positioning shaft 71 is locked on the upper end surface of the buffer cavity 16 through a locking piece. After the positioning block 6 is inserted into the connection groove, it is fixed on the cylinder block 1 through a locking piece, and the positioning shaft 71 is fixed in the buffer cavity 16 by pressing against the lower installation block 74 of the positioning shaft 71.
[0025] The positioning block 6 is provided with a plurality of oil drainage channels 61 and an oil discharge channel 62. One end of each oil drainage channel 61 is arranged on the upper end surface of the positioning block 6 and communicated with the buffer cavity 16. The other ends of the oil drainage channels 61 converge on the oil discharge channel 62. One end of the oil discharge channel 62 is communicated with each oil drainage channel 61, and the other end extends to the lower end surface of the positioning block 6. A plug 63 for blocking the oil discharge channel 62 is further arranged on the lower end surface of the positioning block 6.
[0026] The cylinder head 2 is provided with a connecting convex ring 21. An installation step 19 adapted to the connecting convex ring 21 is arranged in the inner cavity of the cylinder block 1. A sealing ring 5 is further arranged between the connecting convex ring 21 and the installation step 19. The cross section of the sealing ring 5 is L-shaped. The sealing ring 5 includes a bottom pressing part 52 arranged at the bottom between the connecting convex ring 21 and the installation step 19, and a side pressing part 51 arranged between the connecting convex ring 21 and the inner wall of the cylinder block 1. The bottom pressing part 52 and the side pressing part 51 are integrally formed. A first sealing ring 53 coaxially arranged with the sealing ring 5 is arranged at the left end of the bottom pressing part 52, and a second sealing ring 54 coaxially arranged with the sealing ring 5 is arranged at the right end of the bottom pressing part 52. The first sealing ring 53 and the second sealing ring 54 are arranged in a staggered manner, and the cross sections of the first sealing ring 53 and the second sealing ring 54 are both hemispherical. A first sealing groove 22 adapted to the first sealing ring 53 is arranged on the connecting convex ring 21, and a second sealing groove 191 adapted to the second sealing ring 54 is arranged on the installation step 19. After the connecting convex ring 21 of the cylinder head 2 extends into the inner cavity, the cylinder head 2 forms a sealed connection with the installation adjustment through the cooperation of the first sealing ring 53 and the first sealing groove 22, and the cooperation of the second sealing ring 54 and the second sealing groove 191, and is fixed on the cylinder block 1 through a locking member.
[0027] Shock-absorbing gaskets 31 are arranged on both the left and right sides of the piston plate 3.
[0028] The working principle of the present utility model: During the use of the present utility model, the piston plate and the piston rod 4 are installed in the cylinder block 1, and then the cylinder head 2 is installed on the cylinder block 1. During the installation process, after the connecting convex ring 21 of the cylinder head 2 extends into the inner cavity, the cylinder head 2 forms a sealed connection with the installation adjustment through the cooperation of the first sealing ring 53 and the first sealing groove 22, and the cooperation of the second sealing ring 54 and the second sealing groove 191, and is fixed on the cylinder block 1 through a locking member. After the installation of the cylinder head 2 and the cylinder block 1 is completed, the overall hydraulic cylinder realizes the movement of the piston rod 4 through the cooperation of the oil inlet 11 and the oil outlet 12 with an external oil tank.
[0029] During the extension of the piston rod 4, when the oil pressure in the first oil inlet chamber 13 is too high, the control valve 18 opens the buffer channel. The excess oil enters the oil inlet channel 15 and pushes the ball plug 77 under high pressure. Driven by the oil pressure, the ball plug 77 drives the arc-shaped slide rod 76 to apply force to the return spring 742 and the arc-shaped rotating seat 75. The arc-shaped rotating seat 75 overcomes the force of the torsion spring 73 and drives the rotating sleeve 72 to rotate. During the rotation, the ball plug 77 at the other end is driven to disengage from the oil outlet channel 17, thus opening the oil outlet channel 17, facilitating the smooth flow of the entire buffer channel, and further facilitating the pressure relief and buffering of the oil pressure in the cylinder block 1. Similarly, during the retraction of the piston rod 4, the excess oil in the second oil inlet chamber 14 passes through the oil outlet channel 17 and pushes open the ball plug 77 on the oil outlet channel 17, driving the rotation of the rotating sleeve 72 and opening the ball plug 77 on the other side, achieving the smooth flow of the entire buffer channel. After the excess oil pressure in the cylinder block 1 is relieved and buffered, the control valve 18 closes the buffer channel. While the torsion spring 73 applies force to the rotating sleeve 72, the return spring 742 applies force to the arc-shaped slide rod 76. Each ball plug 77 presses against and blocks the oil inlet channel 15 and the oil outlet channel 17 simultaneously, achieving the self-locking of the buffer chamber 16. After the use of the hydraulic cylinder, opening the plug 63 can drain the remaining oil in the buffer chamber 16. When the components in the buffer chamber 16 are damaged or need to be repaired, the positioning block 6 can be removed to repair and replace the components in the buffer chamber 16;
[0030] The utility model effectively solves the problems in the prior art that the buffering performance of the hydraulic cylinder is poor and the excessive pressure of the hydraulic cylinder greatly affects the service life of the hydraulic cylinder. By relieving and buffering the oil pressure in the cylinder block 1, the use quality, use efficiency, and service life of the hydraulic cylinder are greatly guaranteed. The structure is ingenious, convenient, and practical.
[0031] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the utility model. It should be understood that the above are only specific embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.
Claims
1. A self-locking buffer hydraulic cylinder, having a cylindrical cylinder body and a cylinder head mounted on a rod body. The cylinder body is provided with an oil inlet and an oil outlet. A piston plate coaxial with the cylinder body is arranged in the cylinder body. A piston rod coaxial with the piston plate is arranged on the piston plate. One end of the piston rod is fixed on the piston plate, and the other end of the piston rod passes through the cylinder body and is slidably connected with the cylinder body; it is characterized in that: The cylinder body is provided with an inner cavity, which is divided into a first oil inlet cavity and a second oil inlet cavity by a piston plate. A buffer channel for communicating the first oil inlet cavity and the second oil inlet cavity is provided on the inner wall of the cylinder body. The buffer channel includes an oil inlet channel communicating with the first oil inlet cavity, a buffer cavity, and an oil outlet channel communicating with the second oil inlet cavity. A control valve for controlling the opening and closing of the buffer channel is provided on the oil inlet channel. A control component for controlling the synchronous on-off of the buffer cavity with the first oil inlet cavity and the second oil inlet cavity is provided in the buffer cavity. The control component includes a positioning shaft fixed in the buffer cavity, a rotating sleeve sleeved on the positioning shaft and rotatably connected to the positioning shaft, arc-shaped rotating seats symmetrically arranged on the outer wall of the rotating sleeve along the axis of the positioning shaft, arc-shaped sliding rods slidably arranged on each arc-shaped rotating seat, and ball plugs fixed on each arc-shaped sliding rod and capable of synchronously opening and closing the oil inlet channel and the oil outlet channel. A torsion spring is arranged between the positioning shaft and the rotating sleeve, and the two ends of the torsion spring act on the inner wall of the positioning shaft and the rotating sleeve respectively. Each arc-shaped rotating seat is provided with an arc-shaped chute adapted to the arc-shaped sliding rod. A return spring is sleeved on each arc-shaped sliding rod, and the two ends of the return spring act on the arc-shaped sliding rod and the inner wall of the arc-shaped chute respectively. Each ball plug is pressed against the connection ends of the oil inlet channel and the oil outlet channel with the buffer cavity by the continuous force of the torsion spring on the rotating sleeve and the continuous force of the return spring on the arc-shaped sliding rod, and forms a self-locking of the buffer cavity.
2. A self-locking buffer hydraulic cylinder according to claim 1, characterized in that: Installation blocks are provided at both the upper and lower ends of the positioning shaft. The positioning shaft is fixedly arranged between the opposite installation blocks. The outer diameter of the rotating sleeve is the same as that of the installation blocks. A connection groove communicating with the buffer cavity is provided on the outer wall of the cylinder body. A positioning block is hermetically installed in the connection groove. The positioning shaft is locked on the upper end surface of the buffer cavity by a locking member. After the positioning block is inserted into the connection groove, it is fixed on the cylinder body by the locking member, and the positioning shaft is fixed in the buffer cavity by pressing against the installation block at the lower end of the positioning shaft.
3. A self-locking buffer hydraulic cylinder according to claim 2, characterized in that: The positioning block is provided with a plurality of oil drainage channels and an oil discharge channel. One end of each oil drainage channel is arranged on the upper end surface of the positioning block and communicates with the buffer cavity. The other ends of each oil drainage channel converge on the oil discharge channel. One end of the oil discharge channel communicates with each oil drainage channel, and the other end extends to the lower end surface of the positioning block. A plug for blocking the oil discharge channel is also provided on the lower end surface of the positioning block.
4. A self-locking buffer hydraulic cylinder according to claim 3, characterized in that: The cylinder head is provided with a connecting convex ring, and an installation step adapted to the connecting convex ring is provided in the inner cavity of the cylinder block. A sealing ring is further provided between the connecting convex ring and the installation step. The cross section of the sealing ring is L-shaped. The sealing ring includes a bottom pressing part arranged at the bottom of the connecting convex ring and the installation step, and a side pressing part arranged between the connecting convex ring and the inner wall of the cylinder block. The bottom pressing part and the side pressing part are integrally formed. A first sealing ring coaxially arranged with the sealing ring is provided at the left end of the bottom pressing part, and a second sealing ring coaxially arranged with the sealing ring is provided at the right end of the bottom pressing part. The first sealing ring and the second sealing ring are arranged in a staggered manner, and the cross sections of the first sealing ring and the second sealing ring are both hemispherical. A first sealing groove adapted to the first sealing ring is provided on the connecting convex ring, and a second sealing groove adapted to the second sealing ring is provided on the installation step. After the connecting convex ring of the cylinder head extends into the inner cavity, the cylinder head forms a sealed connection with the installation adjustment through the cooperation of the first sealing ring and the first sealing groove, and the cooperation of the second sealing ring and the second sealing groove, and is fixed on the cylinder block by a locking member.
5. The self-locking buffer hydraulic cylinder according to claim 4, wherein: Shock-absorbing gaskets are provided on both the left and right sides of the piston plate.