Pressure relief buffer type hydraulic oil cylinder
By setting up buffer channels and staggered buffer plate structures in the hydraulic cylinder, the problem of poor buffering performance of hydraulic cylinders is solved, efficient pressure relief buffering and sealing is achieved, and the service life of the hydraulic cylinder is extended.
Patent Information
- Application Number
- CN202422198639.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The buffering performance of existing hydraulic cylinders is poor, which will affect its service life if the pressure of the hydraulic cylinder is too large.
A pressure relief buffer type hydraulic oil cylinder is designed. By setting a buffer channel and an interlaced buffer plate structure in the cylinder body, combined with the design of sealing block, rotating seat and torsion spring, the multidirectional and reusable pressure relief buffer of the oil is achieved, and residual oil is discharged through the oil drainage channel and the oil drainage channel to enhance the sealing property.
It effectively improves the buffering performance of the hydraulic cylinder, ensures the safety and stability of the cylinder, and extends the service life.
Smart Images
Figure CN223136539U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hydraulic cylinders, and particularly relates to a pressure-relieving and buffering 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 buffering device, and an exhaust device. Among them, the buffering 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. The traditional buffering hydraulic cylinder can basically meet people's usage requirements, but there are still certain problems. In the prior art, the buffering performance of the hydraulic cylinder is poor, and the excessive pressure of 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 pressure-relieving and buffering hydraulic cylinder with a wonderful structure, which can stably and efficiently relieve pressure and buffer the hydraulic cylinder, thereby ensuring the safety of the hydraulic cylinder, and being convenient and practical.
[0005] The technical solution for achieving the object of the present utility model is as follows: The present utility model has an oil cylinder body, a piston slidably disposed within the oil cylinder body, a piston rod fixed to the piston, and cylinder heads hermetically connected to both ends of the oil cylinder body. One end of the piston rod away from the piston passes through and extends out of the cylinder head. The oil cylinder body is provided with an oil inlet and an oil outlet. The oil cylinder body has an inner cavity, and the inner cavity is partitioned into a first chamber and a second chamber by the piston. The oil inlet is communicated with the first chamber, and the oil outlet is communicated with the second chamber. The oil cylinder body is provided with a buffer passage. The buffer passage includes an oil inlet passage, a first reduced-diameter passage, an intermediate passage, a second reduced-diameter passage, and an oil outlet passage. The oil inlet passage is communicated with the first chamber, and the oil outlet passage is communicated with the second chamber. The inner diameters of the oil inlet passage and the oil outlet passage are the same and are both larger than the inner diameter of the intermediate passage. The two ends of the first reduced-diameter passage are respectively communicated with the oil inlet passage and the intermediate passage. The two ends of the second reduced-diameter passage are respectively communicated with the intermediate passage and the oil outlet passage. A control valve for controlling the opening and closing of the buffer passage is provided in the intermediate passage. The oil cylinder body is provided with a mounting groove communicated with the intermediate passage. A sealing block is detachably mounted in the mounting groove. A sealing sleeve is sleeved on the sealing block. The sealing block is hermetically connected to the mounting groove by the pressing of the sealing sleeve against the inner wall of the mounting groove. After the sealing block closes the intermediate passage, it is fixed to the oil cylinder body by a locking member. A first plate group is provided in the intermediate passage, and a second plate group corresponding to the first plate group is provided on the sealing block. The first plate group includes a plurality of first buffer plates rotatably connected to the upper end of the intermediate passage. The second plate group includes a plurality of second buffer plates rotatably connected to the sealing block. The first buffer plates on the first plate group and the second buffer plates on the second plate group are arranged alternately. Each first buffer plate is suspended and rotatable in the intermediate passage. After each second buffer plate rotates, it is reset to the vertical state by an elastic member. The buffer passage relieves and buffers the oil pressure received by the piston through the cooperation of each first buffer plate and each second buffer plate.
[0006] Further, on the surface of the sealing block located within the intermediate passage, there are provided a plurality of rotating seats corresponding to each of the second buffer plates one by one. On both sides of each second buffer plate, there are provided rotating shafts. On each rotating shaft, there are provided rotating grooves adapted to each of the rotating shafts. A torsion spring is sleeved on each rotating shaft. The two ends of each torsion spring respectively act on the corresponding rotating shaft and rotating groove. Each second buffer plate is rotatably connected to the rotating seat through the cooperation of each rotating shaft and rotating groove. After each second buffer plate rotates under the continuous force application of the torsion spring, it is reset to the vertical state.
[0007] Further, the sealing block is provided with a plurality of oil drain channels and one oil discharge channel. One end of each oil drain channel is located between each of the rotating seats and is communicated with the intermediate passage. The other ends of each oil drain channel converge on the oil discharge channel. The sealing block is further provided with an oil discharge port. The oil discharge channel is communicated with the oil discharge port. A plug for blocking the oil discharge port is provided on the oil discharge port.
[0008] Furthermore, connection bosses that can extend into the inner cavity are provided on each cylinder head. Sealing rings are sleeved on the outer walls of the connection bosses. A plurality of inner tooth rings are provided on the inner wall of the sealing ring, and a plurality of outer tooth rings are provided on the outer wall of the sealing ring. Each inner tooth ring and outer tooth ring are coaxially arranged with the sealing ring. The inner tooth rings are evenly distributed on the inner wall of the sealing ring along the extending direction of the axis of the sealing ring, and the outer tooth rings are evenly distributed on the outer wall of the sealing ring along the extending direction of the axis of the sealing ring. Inner tooth grooves adapted to the inner tooth rings are provided on the connection bosses, and outer tooth grooves adapted to the outer tooth rings are provided on the inner wall of the oil cylinder body. The sealing ring is fixed between the connection boss and the oil cylinder body through the cooperation of each inner tooth ring and the corresponding inner tooth groove and the cooperation of each outer tooth ring and the corresponding outer tooth groove. Each cylinder head forms a sealed connection with the oil cylinder body through the sealing ring.
[0009] Furthermore, buffer pads are provided on both sides of the piston.
[0010] The utility model has positive effects: (1) By providing a buffer channel on the oil cylinder body, the buffer channel is configured as a combination of an oil inlet channel, a first reduced-diameter channel, an intermediate channel, a second reduced-diameter channel, and an oil outlet channel. The inner diameters of the oil inlet channel and the oil outlet channel are both larger than the inner diameter of the intermediate channel. When the oil fluid flows into the first chamber, when the oil fluid enters the intermediate channel from the first reduced-diameter channel, the channel becomes narrower and the oil pressure increases. The pressure relief channel formed between the first buffer plate and the second buffer plate in the intermediate channel increases the flow stroke of the oil fluid, and the blockage of the first buffer plate and the second buffer plate can comprehensively and efficiently relieve the pressure of the oil fluid. Similarly, when the oil pressure flows into the second chamber, the first buffer plate and the second buffer plate in the intermediate channel can also cooperate to relieve the pressure of the oil fluid. The setting of the sealing block in the installation groove can, on the one hand, discharge the residual oil fluid in the intermediate channel, and on the other hand, can also facilitate the loading, unloading, and replacement of the first buffer plate and the second buffer plate, ensuring the stable buffering and pressure relief of the oil fluid in the intermediate channel. The structure is ingenious, stable, and practical.
[0011] (2) By providing a plurality of rotating seats on the sealing block, each second buffer plate is rotatably connected through the cooperation of a rotating shaft and a rotating groove, and under the action of a torsion spring, it is ensured that the second buffer plate can be reset to the vertical state after rotation. The vertical second buffer plate and the first buffer plate can buffer the impact force of the oil fluid in the vertical state and rotate along with the flow of the oil fluid. After the first buffer plate and the second buffer plate rotate and reset, they can continue to relieve the pressure of the oil fluid flowing in the same or opposite directions, thereby ensuring the multi-directionality and reusability of the pressure relief buffering.
[0012] (3) The utility model discharges the residual oil in the middle channel after the plug head is opened through the cooperation of a plurality of oil discharge channels and oil drainage channels arranged on the sealing block, effectively ensuring the integrity of the middle channel and laying a foundation for the high efficiency of the first buffer plate and the second buffer plate in buffering the oil in the middle channel in the later stage. It is convenient and practical.
[0013] (4) The utility model effectively ensures the firmness and tightness of the connection between the sealing ring and the cylinder head and the oil cylinder body through the cooperation of the inner tooth ring and the outer tooth ring on the sealing ring, the cooperation of the inner tooth ring and the inner tooth groove, and the cooperation of the outer tooth ring and the outer tooth groove by arranging a connecting boss on the cylinder head and a sealing ring on the connecting boss, thereby ensuring the stability during the use of the hydraulic cylinder. It is safe and practical.
[0014] (5) The utility model further ensures the safety during the use of the hydraulic cylinder by arranging buffer pads on both sides of the piston, which can reduce the collision between the piston and the inner wall of the oil cylinder body when the piston reaches the limit position in the oil cylinder body. It is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to make the content of the utility model easier to be clearly understood, the following further details the utility model according to specific embodiments in conjunction with the drawings, where
[0016] Figure 1 is a cross-sectional view of the overall structure of the pressure relief and buffer type hydraulic cylinder in the 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 connection structure between the second buffer plate and the rotating seat in the utility model;
[0020] Figure 5 is a cross-sectional view of the cylinder head in the utility model;
[0021] Figure 6 is Figure 5 an enlarged view of part C in
[0022] Figure 7 is a cross-sectional view of the overall structure of the sealing ring in the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] See Figures 1 to 7, the utility model has an oil cylinder body 1, a piston 3 slidably arranged in the oil cylinder body 1, a piston rod 4 fixed on the piston 3, and cylinder heads 2 hermetically connected to both ends of the oil cylinder body 1. One end of the piston rod 4 away from the piston 3 passes through and extends out of the cylinder head 2. The oil cylinder body 1 is provided with an oil inlet 11 and an oil outlet 12. The oil cylinder body 1 has an inner cavity, and the inner cavity is divided into a first chamber 13 and a second chamber 14 by the piston 3. The oil inlet 11 is communicated with the first chamber 13, and the oil outlet 12 is communicated with the second chamber 14. The oil cylinder body 1 is provided with a buffer channel, and the buffer channel includes an oil inlet channel 15, a first reduced-diameter channel 16, an intermediate channel 17, a second reduced-diameter channel 18, and an oil outlet channel 19. The oil inlet channel 15 is communicated with the first chamber 13, and the oil outlet channel 19 is communicated with the second chamber 14. The inner diameters of the oil inlet channel 15 and the oil outlet channel 19 are the same and are both larger than the inner diameter of the intermediate channel 17. The two ends of the first reduced-diameter channel 16 are respectively communicated with the oil inlet channel 15 and the intermediate channel 17, and the two ends of the second reduced-diameter channel 18 are respectively communicated with the intermediate channel 17 and the oil outlet channel 19. A control valve 6 for controlling the opening and closing of the buffer channel is arranged in the intermediate channel 17. The oil cylinder body 1 is provided with a mounting groove communicated with the intermediate channel 17. A sealing block 5 is detachably mounted in the mounting groove. A sealing sleeve 51 is sleeved on the sealing block 5. The sealing block 5 is hermetically connected to the mounting groove by the pressing of the sealing sleeve 51 against the inner wall of the mounting groove. After the sealing block 5 closes the intermediate channel 17, it is fixed on the oil cylinder body 1 by a locking member. A first plate group is arranged in the intermediate channel 17, and a second plate group corresponding to the first plate group is arranged on the sealing block 5. The first plate group includes a plurality of first buffer plates 171 rotatably connected to the upper end of the intermediate channel 17. The second plate group includes a plurality of second buffer plates 56 rotatably connected to the sealing block 5. Each first buffer plate 171 on the first plate group and each second buffer plate 56 on the second plate group are arranged alternately. Each first buffer plate 171 is suspended and rotated in the intermediate channel 17. After each second buffer plate 56 rotates, it is reset to the vertical state by an elastic member. The buffer channel relieves and buffers the oil pressure received by the piston 3 through the cooperation of each first buffer plate 171 and each second buffer plate 56.
[0024] On the surface of the sealing block 5 located in the intermediate channel 17, there are a plurality of rotating seats 55 corresponding to each second buffer plate 56 one by one. Both sides of each second buffer plate 56 are provided with rotating shafts 562. Each rotating shaft is provided with a rotating groove 551 adapted to each rotating shaft 562. Each rotating shaft 562 is sleeved with a torsion spring 561. Both ends of each torsion spring 561 act on the corresponding rotating shaft 562 and rotating groove 551 respectively. Each second buffer plate 56 is rotatably connected to the rotating seat 55 through the cooperation of each rotating shaft 562 and rotating groove 551. After each second buffer plate 56 rotates through the continuous force application of the torsion spring 561, it is reset to the vertical state.
[0025] The sealing block 5 is provided with a plurality of oil drain channels 52 and an oil discharge channel 53. One end of each oil drain channel 52 is located between the respective rotating seats 55 and communicates with the intermediate channel 17. The other ends of the respective oil drain channels 52 converge on the oil discharge channel 53. The sealing block 5 is further provided with an oil discharge port, and the oil discharge channel 53 communicates with the oil discharge port. A plug 54 for blocking the oil discharge port is arranged on the oil discharge port.
[0026] Each cylinder head 2 is provided with a connecting boss 21 that can extend into the inner cavity. A sealing ring 22 is sleeved on the outer wall of each connecting boss 21. A plurality of inner tooth rings 221 are arranged on the inner wall of the sealing ring 22, and a plurality of outer tooth rings 222 are arranged on the outer wall of the sealing ring 22. Each inner tooth ring 221 and outer tooth ring 222 are coaxially arranged with the sealing ring 22. Each inner tooth ring 221 is evenly distributed on the inner wall of the sealing ring 22 along the extending direction of the axis of the sealing ring 22, and each outer tooth ring 222 is evenly distributed on the outer wall of the sealing ring 22 along the extending direction of the axis of the sealing ring 22. The connecting boss 21 is provided with inner tooth grooves 211 adapted to the respective inner tooth rings 221, and the inner wall of the oil cylinder body 1 is provided with outer tooth grooves 10 adapted to the respective outer tooth rings 222. The sealing ring 22 is fixed between the connecting boss 21 and the oil cylinder body 1 through the cooperation of each inner tooth ring 221 and the corresponding inner tooth groove 211, and the cooperation of each outer tooth ring 222 and the corresponding outer tooth groove 10. Each cylinder head 2 forms a sealed connection with the oil cylinder body 1 through the sealing ring 22.
[0027] Buffer pads 31 are arranged on both sides of the piston 3.
[0028] Working principle of the utility model: During the use of the utility model, after the piston 3 and the piston rod 4 are installed into the oil cylinder body 1, the cylinder heads 2 at both ends are installed. During the installation process, the connecting bosses 21 on each cylinder head 2 extend into the inner cavity of the oil cylinder body 1. And during the installation process, the sealing ring 22 is fixed between the connecting boss 21 and the oil cylinder body 1 through the cooperation of each inner tooth ring 221 and the corresponding inner tooth groove 211, as well as the cooperation of each outer tooth ring 222 and the corresponding outer tooth groove 10. Each cylinder head 2 forms a sealed connection with the oil cylinder body 1 through the sealing ring 22. After the oil cylinder body 1 is connected to each cylinder head 2, the oil inlet 11 and the oil outlet 12 of the hydraulic cylinder are connected to an external oil tank. During the process of the piston rod 4 extending, the oil fluid enters the first chamber 13 through the oil inlet 11. When the oil pressure in the first chamber 13 is too high, the control valve 6 opens, and part of the oil fluid in the first chamber 13 enters the oil inlet passage 15 and the first variable-diameter passage 16 and then enters the intermediate passage 17. After the oil fluid enters the intermediate passage 17, the staggered first buffer plates 171 and the second buffer plates 56 form a wavy pressure relief passage. Each first flow buffer plate and the second flow buffer plate can block the oil fluid, thereby relieving pressure and buffering the oil fluid. And the first flow buffer plate and the second flow buffer plate rotate in the direction of the oil fluid flow driven by the oil fluid, so as to ensure the smooth passage of the oil fluid. After the oil fluid passes through, each first flow buffer plate returns to its original position by its own weight, and each second flow buffer plate returns to its original position by the continuous force applied by the torsion spring 561, thereby effectively relieving pressure and buffering the extension of the piston rod 4. During the process of the piston rod 4 retracting, the oil fluid enters the second chamber 14 through the oil outlet 12. When the oil fluid in the second chamber 14 is too much, the control valve 6 opens, and the excess oil fluid in the second chamber 14 enters the intermediate passage 17 through the oil outlet passage 19 and the second variable-diameter passage 18 for pressure relief and buffering. After the buffering is completed, it enters the first chamber 13 through the first variable-diameter passage 16 and the oil inlet passage 15. The remaining oil fluid in the intermediate chamber can enter the oil discharge passage 53 through each oil discharge hole 52 and then be discharged. When the first flow buffer plate or the second flow buffer plate is damaged, the sealing block 5 can be taken out to open the intermediate passage 17 to replace the first flow buffer plate and the second flow buffer plate, thereby ensuring the buffering and pressure relief of the oil fluid in the intermediate passage 17, effectively solving the problem that the buffering 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. The excess oil pressure of the oil cylinder body 1 is relieved and buffered efficiently through the buffer passage, ensuring the efficiency of the hydraulic cylinder during use and also ensuring the safety of the hydraulic cylinder. The structure is ingenious, stable and practical.
[0029] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above description is only for the specific embodiments of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A pressure relief and buffer type hydraulic cylinder, comprising a cylinder body, a piston slidably arranged in the cylinder body, a piston rod fixed on the piston, and cylinder heads hermetically connected to both ends of the cylinder body. One end of the piston rod away from the piston passes through and extends out of the cylinder head. An oil inlet and an oil outlet are provided on the cylinder body. An inner cavity is provided in the cylinder body, and the inner cavity is divided into a first chamber and a second chamber by the piston. The oil inlet is communicated with the first chamber, and the oil outlet is communicated with the second chamber; it is characterized in that: A buffer channel is provided on the cylinder body. The buffer channel includes an oil inlet channel, a first reduced-diameter channel, an intermediate channel, a second reduced-diameter channel, and an oil outlet channel. The oil inlet channel communicates with the first chamber, and the oil outlet channel communicates with the second chamber. The inner diameters of the oil inlet channel and the oil outlet channel are the same and are both larger than the inner diameter of the intermediate channel. The two ends of the first reduced-diameter channel are respectively communicated with the oil inlet channel and the intermediate channel, and the two ends of the second reduced-diameter channel are respectively communicated with the intermediate channel and the oil outlet channel. A control valve for controlling the opening and closing of the buffer channel is provided in the intermediate channel. An installation groove communicated with the intermediate channel is provided on the cylinder body. A sealing block is detachably installed in the installation groove. A sealing sleeve is sleeved on the sealing block. The sealing block is hermetically connected to the installation groove by the pressing of the sealing sleeve against the inner wall of the installation groove. After the intermediate channel is closed by the sealing block, it is fixed on the cylinder body by a locking member. A first plate group is provided in the intermediate channel, and a second plate group corresponding to the first plate group is provided on the sealing block. The first plate group includes a plurality of first buffer plates rotatably connected to the upper end of the intermediate channel, and the second plate group includes a plurality of second buffer plates rotatably connected to the sealing block. The first buffer plates on the first plate group and the second buffer plates on the second plate group are arranged alternately. Each first buffer plate is suspended and rotated in the intermediate channel, and each second buffer plate is rotated and reset to the vertical state by an elastic member after rotation. The buffer channel relieves and buffers the oil pressure received by the piston through the cooperation of each first buffer plate and the second buffer plate.
2. The pressure relief and buffering type hydraulic cylinder according to claim 1, wherein: On the surface of the sealing block located in the intermediate channel, a plurality of rotating seats corresponding to each second buffer plate are provided. Rotating shafts are provided on both sides of each second buffer plate. Rotating grooves adapted to each rotating shaft are provided on each rotating shaft. A torsion spring is sleeved on each rotating shaft. The two ends of each torsion spring respectively act on the corresponding rotating shaft and the rotating groove. Each second buffer plate is rotatably connected to the rotating seat through the cooperation of each rotating shaft and the rotating groove. Each second buffer plate is rotated and reset to the vertical state by the continuous force application of the torsion spring.
3. A pressure relief and buffer type hydraulic cylinder according to claim 2, characterized in that: A plurality of oil discharge hole channels and an oil drainage hole channel are provided on the sealing block. One end of each oil discharge hole channel is located between each rotating seat and communicates with the intermediate channel. The other ends of each oil discharge hole channel converge on the oil drainage hole channel. An oil drainage port is also provided on the sealing block. The oil drainage hole channel communicates with the oil drainage port. A plug for blocking the oil drainage port is provided on the oil drainage port.
4. A pressure relief and buffer type hydraulic cylinder according to claim 3, characterized in that: Each cylinder head is provided with a connecting boss that can extend into the inner cavity. A sealing ring is sleeved on the outer wall of each connecting boss. A plurality of inner tooth rings are provided on the inner wall of the sealing ring, and a plurality of outer tooth rings are provided on the outer wall of the sealing ring. Each inner tooth ring and outer tooth ring are coaxially arranged with the sealing ring. The inner tooth rings are evenly distributed on the inner wall of the sealing ring along the extending direction of the axis of the sealing ring, and the outer tooth rings are evenly distributed on the outer wall of the sealing ring along the extending direction of the axis of the sealing ring. Inner tooth grooves adapted to the inner tooth rings are provided on the connecting boss, and outer tooth grooves adapted to the outer tooth rings are provided on the inner wall of the oil cylinder body. The sealing ring is fixed between the connecting boss and the oil cylinder body through the cooperation of each inner tooth ring and the corresponding inner tooth groove, and the cooperation of each outer tooth ring and the corresponding outer tooth groove. Each cylinder head forms a sealed connection with the oil cylinder body through the sealing ring.
5. A pressure relief and buffer type hydraulic cylinder according to claim 4, characterized in that: Buffer pads are provided on both sides of the piston.