Hydraulic cylinder with double seal compensation structure

Abstract

The utility model relates to hydraulic pressure oil cylinder technical field, and disclose a kind of hydraulic pressure oil cylinder with double sealing compensation structure, including cylinder body, front cylinder cover being installed in the left end of cylinder body, rear cylinder cover being installed in the right end of cylinder body, oil valve interface being communicated and being arranged in the front part of cylinder body, and connecting assembly being arranged in the side of cylinder body, the connecting assembly includes dismounting mechanism being arranged in the end of cylinder body, the end of cylinder body is also provided with auxiliary mechanism, the clamping rod is movably penetrated in cylinder body and mounting sleeve, and the clamping rod is clamped with the clamping groove, one end of spring is fixedly connected with movable block, the connecting rod top end is movably penetrated in mounting sleeve, the positioning rod is movably connected in positioning hole, and the positioning rod is matched with limit slot. The utility model solves the problem that the sealing expansion ring installed in the heat conduction groove of the existing device will wear after long-term use, and facilitates manual replacement, thereby affecting the applicability of the device.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a hydraulic cylinder with a dual sealing compensation structure. Background Technology

[0002] A hydraulic cylinder, also known as a hydraulic actuator, is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device and has no transmission backlash, resulting in smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device. The cushioning and venting devices are optional depending on the specific application, while the other devices are essential.

[0003] According to the double sealing assembly for a hydraulic cylinder disclosed in patent publication number CN 208966765 U, the device can utilize the heat generated by the reciprocating motion of the piston. Through the heat-conducting column and heat-conducting groove, the heat can be conducted to the sealing expansion ring, causing the sealing expansion ring to expand and tightly fit the cover, thereby strengthening the sealing effect between the cover and the cylinder. However, after long-term use, the sealing expansion ring installed in the heat-conducting groove will wear out, requiring manual replacement, thus affecting the applicability of the device.

[0004] To address this issue, we propose a hydraulic cylinder with a dual-seal compensation structure. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic cylinder with a dual sealing compensation structure, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder with a dual sealing compensation structure, comprising a cylinder body;

[0007] The front cylinder head is installed on the left end of the cylinder block;

[0008] The rear cylinder head is installed on the right end of the cylinder block;

[0009] Connect to the oil valve interface located at the front of the cylinder block;

[0010] And a connecting assembly disposed on one side of the cylinder body, the connecting assembly including a disassembly and assembly mechanism disposed at the end of the cylinder body, and an auxiliary mechanism disposed at the end of the cylinder body.

[0011] Preferably, the disassembly and assembly mechanism includes an annular groove at the end of the cylinder body, an installation ring fixedly connected to the inner wall of the annular groove, a first sealing ring fixedly connected to the outer side of the installation ring, a positioning groove on the inner wall of the annular groove, a positioning block being engaged inside the positioning groove, a slot being provided on one side of the positioning block, an installation sleeve fixedly connected to the outer wall of the cylinder body, a movable groove being provided inside the installation sleeve, a movable block being slidably connected to the inner wall of the movable groove, a snap-fit ​​rod fixedly connected to the inner side of the movable block, a connecting rod fixedly connected to the upper part of the movable block, a spring fixedly connected to the inner wall of the movable groove, a rotating rod being rotatably connected to the top of the connecting rod via a bearing, a positioning rod being fixedly connected to the inner side of the rotating rod, a positioning hole being provided inside the installation sleeve, and a limit groove being provided on the outer side of the installation sleeve.

[0012] Preferably, the auxiliary mechanism includes a mounting groove formed on the outer wall of the front cylinder head, a second sealing ring fixedly connected to the inner wall of the mounting groove, a piston slidably connected to the inner wall of the cylinder, and a piston rod fixedly connected to one side of the piston.

[0013] Preferably, the snap-fit ​​rod extends through the cylinder body and the mounting sleeve, and the snap-fit ​​rod is snapped into the snap-fit ​​groove. Through the cooperation of the annular groove, mounting ring, first sealing ring, positioning groove, positioning block, snap-fit ​​groove, mounting sleeve, movable groove, movable block, snap-fit ​​rod, connecting rod, spring, rotating rod, positioning rod, positioning hole, and limiting groove, it is convenient for manual replacement of the first sealing ring with excessive wear in a timely manner, thereby achieving a better sealing effect.

[0014] Preferably, one end of the spring is fixedly connected to the movable block, and the top end of the connecting rod movably passes through the mounting sleeve.

[0015] Preferably, the positioning rod is movably connected in the positioning hole, and the positioning rod is adapted to the limiting groove. Through the cooperation of the mounting groove, the second sealing ring, the piston, and the piston rod, it can achieve a sealing effect on the inner end of the front cylinder head and the rear cylinder head and the inner wall of the cylinder body. With the cooperation of the first sealing ring, it can achieve a sealing effect on both ends of the front cylinder head and the rear cylinder head, thereby improving the sealing effect.

[0016] Preferably, the piston rod extends through the front cylinder head.

[0017] This invention provides a hydraulic cylinder with a dual-sealing compensation structure. This hydraulic cylinder with a dual-sealing compensation structure has the following advantages:

[0018] (1) The hydraulic cylinder with a dual sealing compensation structure, through the installation and disassembly mechanism, and through the cooperation of the annular groove, the mounting ring, the first sealing ring, the positioning groove, the positioning block, the slot, the mounting sleeve, the movable groove, the movable block, the snap rod, the connecting rod, the spring, the rotating rod, the positioning rod, the positioning hole, and the limiting groove, facilitates the timely replacement of the first sealing ring with greater wear by manpower, thereby achieving a better sealing effect.

[0019] (2) The hydraulic cylinder with a double sealing compensation structure, through the auxiliary mechanism, through the cooperation of the mounting groove, the second sealing ring, the piston, and the piston rod, can achieve a sealing effect on the inner end of the front cylinder head and the rear cylinder head and the inner wall of the cylinder body. With the cooperation of the first sealing ring, it can achieve a sealing effect on both ends of the front cylinder head and the rear cylinder head, thereby making the sealing effect better. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the disassembly and assembly mechanism of this utility model;

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the auxiliary mechanism structure of this utility model;

[0025] In the diagram: 1. Cylinder block; 2. Front cylinder head; 3. Connecting assembly; 31. Disassembly and assembly mechanism; 311. Annular groove; 312. Mounting ring; 313. First sealing ring; 314. Positioning groove; 315. Positioning block; 316. Snap-in groove; 317. Mounting sleeve; 318. Movable groove; 319. Movable block; 3110. Snap-in rod; 3111. Connecting rod; 3112. Spring; 3113. Rotating rod; 3114. Positioning rod; 3115. Positioning hole; 3116. Limiting groove; 32. Auxiliary mechanism; 321. Mounting groove; 322. Second sealing ring; 323. Piston; 324. Piston rod; 4. Rear cylinder head; 5. Oil valve interface. Detailed Implementation

[0026] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figures 1-5As shown, this utility model provides a technical solution: a hydraulic cylinder with a double sealing compensation structure, including a cylinder body 1, a front cylinder cover 2 installed at the left end of the cylinder body 1, a rear cylinder cover 4 installed at the right end of the cylinder body 1, an oil valve interface 5 connected to the front of the cylinder body 1, and a connecting assembly 3 installed on one side of the cylinder body 1. The connecting assembly 3 includes a disassembly and assembly mechanism 31 installed at the end of the cylinder body 1, and an auxiliary mechanism 32 is also provided at the end of the cylinder body 1. The disassembly and assembly mechanism 31 includes an annular groove 311 opened at the end of the cylinder body 1. An installation ring 312 is fixedly connected to the inner wall of the annular groove 311, and a first sealing ring 313 is fixedly connected to the outer side of the installation ring 312. A positioning groove 314 is opened on the inner wall of the annular groove 311. 4. An internal positioning block 315 is provided, and a slot 316 is provided on one side of the positioning block 315. An installation sleeve 317 is fixedly connected to the outer wall of the cylinder body 1. An active groove 318 is provided inside the installation sleeve 317. An active block 319 is slidably connected to the inner wall of the active groove 318. A locking rod 3110 is fixedly connected to the inner side of the active block 319. A connecting rod 3111 is fixedly connected to the upper part of the active block 319. A spring 3112 is fixedly connected to the inner wall of the active groove 318. A rotating rod 3113 is rotatably connected to the top of the connecting rod 3111 through a bearing. A positioning rod 3114 is fixedly connected to the inner side of the rotating rod 3113. A positioning hole 3115 is provided inside the installation sleeve 317. A limit groove 3116 is provided on the outer side of the installation sleeve 317.

[0029] In this embodiment, the snap-fit ​​rod 3110 movably passes through the cylinder body 1 and the mounting sleeve 317, and the snap-fit ​​rod 3110 is snapped into the snap-fit ​​groove 316. Through the cooperation of the annular groove 311, the mounting ring 312, the first sealing ring 313, the positioning groove 314, the positioning block 315, the snap-fit ​​groove 316, the mounting sleeve 317, the movable groove 318, the movable block 319, the snap-fit ​​rod 3110, the connecting rod 3111, the spring 3112, the rotating rod 3113, the positioning rod 3114, the positioning hole 3115, and the limiting groove 3116, it is convenient for manual replacement of the first sealing ring 313 with large wear in a timely manner, thereby achieving a better sealing effect.

[0030] Furthermore, one end of the spring 3112 is fixedly connected to the movable block 319, and the top end of the connecting rod 3111 moves through the mounting sleeve 317.

[0031] When in use, the device, with the cooperation of the first sealing ring 313 and the second sealing ring 322, can achieve a sealing effect on both sides of the front cylinder head 2 and the rear cylinder head 4. This double sealing improves the sealing effect and increases the device's applicability. When the mounting ring 312 needs to be disassembled, the front cylinder head 2 and the rear cylinder head 4 are first disassembled manually. Then, by manually holding the rotating rod 3113 and pulling the connecting rod 3111 outward, the movable block 319 fixedly connected to the inner end of the connecting rod 3111 moves the locking rod 3110 outward synchronously, allowing the locking rod 3110 to engage with... When the slot 316 is separated, and the rotating rod 3113 moves outward, the positioning rod 3114 can move outward simultaneously and separate from the positioning hole 3115. Then, by manually rotating the rotating rod 3113, the positioning rod 3114 is driven and engaged with the limiting groove 3116. This allows the engaging rod 3110 to stay away from the slot 316, freeing up the operator's hands. Then, the installation ring 312 can be manually removed outward, which facilitates the timely replacement of the first sealing ring 313 with significant wear, preventing damage to the first sealing ring 313 and affecting subsequent use.

[0032] Example 2

[0033] Based on Embodiment 1, a preferred embodiment of the hydraulic cylinder with a dual-seal compensation structure provided by this utility model is as follows: Figures 1 to 5 As shown: The auxiliary mechanism 32 includes a mounting groove 321 formed on the outer wall of the front cylinder head 2. A second sealing ring 322 is fixedly connected to the inner wall of the mounting groove 321. A piston 323 is slidably connected to the inner wall of the cylinder body 1. A piston rod 324 is fixedly connected to one side of the piston 323.

[0034] In this embodiment, the positioning rod 3114 is movably connected in the positioning hole 3115. The positioning rod 3114 is adapted to the limiting groove 3116. Through the cooperation of the mounting groove 321, the second sealing ring 322, the piston 323, and the piston rod 324, a sealing effect can be achieved between the inner ends of the front cylinder head 2 and the rear cylinder head 4 and the inner wall of the cylinder body 1. With the cooperation of the first sealing ring 313, a sealing effect can be achieved at both ends of the front cylinder head 2 and the rear cylinder head 4, thereby improving the sealing effect.

[0035] Furthermore, the piston rod 324 extends through the front cylinder head 2.

[0036] After the front cylinder head 2 and rear cylinder head 4 are disassembled, the second sealing ring 322 can be replaced accordingly. The second sealing ring 322 can seal the contact point between the front cylinder head 2 and the inner side of the cylinder block 1. Similarly, it can seal the contact point between the rear cylinder head 4 and the inner side of the cylinder block 1. With the cooperation of the first sealing ring 313, the double sealing can improve the sealing effect and increase the applicability of the device.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with a dual-seal compensation structure, comprising a cylinder body (1); The front cylinder head (2) is installed on the left end of the cylinder block (1); The rear cylinder head (4) is installed on the right end of the cylinder block (1); Connect the oil valve port (5) located at the front of the cylinder block (1); And a connecting assembly (3) disposed on one side of the cylinder body (1), characterized in that: The connecting assembly (3) includes a disassembly and assembly mechanism (31) disposed at the end of the cylinder body (1), and an auxiliary mechanism (32) is also disposed at the end of the cylinder body (1).

2. A hydraulic cylinder with a dual-sealing compensation structure according to claim 1, characterized in that: The disassembly and assembly mechanism (31) includes an annular groove (311) at the end of the cylinder body (1). An installation ring (312) is fixedly connected to the inner wall of the annular groove (311). A first sealing ring (313) is fixedly connected to the outer side of the installation ring (312). A positioning groove (314) is provided on the inner wall of the annular groove (311). A positioning block (315) is fitted inside the positioning groove (314). A slot (316) is provided on one side of the positioning block (315). An installation sleeve (317) is fixedly connected to the outer wall of the cylinder body (1). A movable groove (318) is provided inside the installation sleeve (317). (318) A movable block (319) is slidably connected to the inner wall. A snap-fit ​​rod (3110) is fixedly connected to the inner side of the movable block (319). A connecting rod (3111) is fixedly connected to the upper part of the movable block (319). A spring (3112) is fixedly connected to the inner wall of the movable groove (318). A rotating rod (3113) is rotatably connected to the top of the connecting rod (3111) through a bearing. A positioning rod (3114) is fixedly connected to the inner side of the rotating rod (3113). A positioning hole (3115) is opened inside the mounting sleeve (317). A limit groove (3116) is opened on the outer side of the mounting sleeve (317).

3. A hydraulic cylinder with a dual-seal compensation structure according to claim 1, characterized in that: The auxiliary mechanism (32) includes a mounting groove (321) formed on the outer wall of the front cylinder head (2), a second sealing ring (322) is fixedly connected to the inner wall of the mounting groove (321), a piston (323) is slidably connected to the inner wall of the cylinder body (1), and a piston rod (324) is fixedly connected to one side of the piston (323).

4. A hydraulic cylinder with a dual-sealing compensation structure according to claim 2, characterized in that: The snap-fit ​​rod (3110) extends through the cylinder body (1) and the mounting sleeve (317), and the snap-fit ​​rod (3110) is snapped into the slot (316).

5. A hydraulic cylinder with a dual-sealing compensation structure according to claim 2, characterized in that: One end of the spring (3112) is fixedly connected to the movable block (319), and the top end of the connecting rod (3111) is movably inserted through the mounting sleeve (317).

6. A hydraulic cylinder with a dual-sealing compensation structure according to claim 2, characterized in that: The positioning rod (3114) is movably connected in the positioning hole (3115), and the positioning rod (3114) is adapted to the limiting groove (3116).

7. A hydraulic cylinder with a dual-sealing compensation structure according to claim 3, characterized in that: The piston rod (324) extends through the front cylinder head (2).

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