Hydraulic cylinder end sealing structure

Abstract

The utility model discloses a hydraulic cylinder end part sealing structure, which relates to the technical field of hydraulic cylinders and comprises a cylinder body, a piston rod is arranged in the cylinder body, a sealing ring is arranged between the piston rod and the cylinder body, a supporting dustproof mechanism is arranged on one side of the sealing ring, and a protection mechanism is arranged on the outer side of the cylinder body. The supporting dustproof mechanism comprises a supporting sleeve, a plurality of supporting steel balls are installed on the inner wall of the supporting sleeve, a first scraping ring and a second scraping ring are arranged on the outer sides of the supporting steel balls, and pressing blocks are fixedly connected to the first scraping ring and the second scraping ring. According to the hydraulic cylinder end sealing structure, the mounting ring is fixedly mounted on the piston rod, the piston rod is supported through the multiple supporting steel balls, the situation that the piston rod is laterally pressed, so that the sealing ring deforms and a gap is enlarged is prevented, and meanwhile the piston rod drives the first scraping ring and the second scraping ring to continuously rotate to clean dust on the piston rod; dust is prevented from entering the interior, and the sealing effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a sealing structure for an end portion of a hydraulic cylinder. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). In the prior art, a sealing ring is used to seal the end of the hydraulic cylinder and the piston rod. When the piston rod is pressurized laterally, the sealing ring is easily deformed due to excessive pressure at the compressed part. Dust can easily enter the cylinder body through the gap at the deformed part, making the sealing effect less than ideal.

[0003] For example, patent publication number CN215333722U specifically discloses a hydraulic cylinder sealing structure. The utility model can more firmly fix the first piston and the second piston on the push-pull rod by setting a fixing nut, and the fixing nut can be removed through a thread, so as to facilitate the replacement and maintenance of the first piston and the second piston, and the disassembly and assembly are relatively convenient. However, there is a problem that when the piston rod is subjected to lateral pressure, the sealing ring is easily deformed due to excessive pressure at the compressed part, and dust can easily enter the cylinder body through the gap at the deformed part, resulting in an unsatisfactory sealing effect.

[0004] For example, patent publication number CN215257117U specifically discloses a hydraulic cylinder sealing structure. The utility model discloses a hydraulic cylinder sealing structure. By adding a sealing mechanism, it can ensure that the hydraulic medium will not leak when the cylinder sleeve and the push rod are relatively extended and retracted. Even if the sealing gasket is worn, it will not affect the sealing performance and the normal use of the hydraulic cylinder. It is simple and practical. However, there is a problem that when the piston rod is subjected to lateral pressure, the sealing ring is easily deformed due to excessive pressure at the compressed part. Dust can easily enter the cylinder body from the gap at the deformed part, making the sealing effect less than ideal. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a hydraulic cylinder end sealing structure, which solves the problem that when the piston rod is laterally pressurized, the sealing ring is easily deformed due to excessive pressure at the compressed part, and dust easily enters the cylinder body through the gap at the deformed part, resulting in an unsatisfactory sealing effect.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a hydraulic cylinder end sealing structure, including a cylinder body, a piston rod is arranged inside the cylinder body, a sealing ring is arranged between the piston rod and the cylinder body, a supporting dustproof mechanism is arranged on one side of the sealing ring, and a protective mechanism is arranged on the outside of the cylinder body;

[0007] The supporting dustproof mechanism includes a supporting sleeve, a plurality of supporting steel balls are installed on the inner wall of the supporting sleeve, a first scraper ring and a second scraper ring are provided on the outer sides of the plurality of supporting steel balls, a pressure block is fixedly connected to the first scraper ring and the second scraper ring, a reset spring is provided on one side of the pressure block, a spring seat is provided on one side of the reset spring, movable tooth grooves are provided on the surfaces of the opposite sides of the first scraper ring and the second scraper ring, a turntable is provided between the two movable tooth grooves, a fan-shaped tooth block is fixedly connected to the turntable, a rotating shaft is fixedly connected to the end of the turntable, a reset spring is installed on the rotating shaft, a winding roller is fixedly connected to the rotating shaft, a driving rope is fixedly connected to the winding roller, a mounting ring is fixedly connected to the end of the driving rope, and a plurality of mounting bolts are provided on the mounting ring.

[0008] Preferably, the support sleeve is fixedly mounted on the end of the cylinder body, and the support sleeve is detachably connected to the cylinder body by bolts.

[0009] Preferably, the plurality of support steel balls are movably connected to the inner wall of the support sleeve, and the plurality of support steel balls are evenly arranged inside the support sleeve.

[0010] Preferably, the spring seat is fixedly mounted on the inner wall of the support sleeve, and both ends of the return spring are fixedly connected to the pressure block and the spring seat respectively.

[0011] Preferably, the turntable is rotatably connected to the inner wall of the support sleeve via a rotating shaft, and the turntable is arranged between the first scraper ring and the second scraper ring.

[0012] Preferably, the mounting ring matches the piston rod, and the mounting ring is fixedly mounted on the piston rod by a plurality of mounting bolts.

[0013] Preferably, the protection mechanism comprises a first protection seat and a second protection seat, and the cylinder body is arranged between the first protection seat and the second protection seat.

[0014] Preferably, four support rods are provided between the first protection seat and the second protection seat, and both ends of each of the support rods are fixedly connected with connecting screws, and the connecting screws are threadedly connected with connecting nuts.

[0015] Beneficial Effects

[0016] The utility model provides a hydraulic cylinder end sealing structure. Compared with the prior art, it has the following advantages:

[0017] Beneficial effects:

[0018] 1. The sealing structure at the end of the hydraulic cylinder is to fix the mounting ring on the piston rod and use multiple supporting steel balls to support the piston rod to prevent the piston rod from being lateral pressed so that the sealing ring is deformed and the gap is increased. At the same time, the piston rod drives the first scraper ring and the second scraper ring to rotate continuously to clean the dust on the piston rod to prevent dust from entering the interior, thereby effectively improving the sealing effect.

[0019] 2. The hydraulic cylinder end sealing structure can protect the cylinder body and prevent the cylinder body surface from being worn by fixing the cylinder body between the first protective seat and the second protective seat and installing the support rod using the connecting nut and the connecting screw. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 This is a schematic diagram of the structure of the supporting dustproof mechanism of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first scraper ring and the second scraper ring of the utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the protection mechanism of the utility model.

[0024] In the figure: 1. cylinder body; 2. supporting dustproof mechanism; 201. supporting sleeve; 202. supporting steel ball; 203. first scraper ring; 204. second scraper ring; 205. pressing block; 206. reset spring; 207. spring seat; 208. movable tooth groove; 209. turntable; 210. sector tooth block; 211. rotating shaft; 212. reset spring; 213. winding roller; 214. driving rope; 215. mounting ring; 216. mounting bolt; 3. piston rod; 4. protection mechanism; 401. first protection seat; 402. second protection seat; 403. supporting rod; 404. connecting screw; 405. connecting nut. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-3The utility model provides a technical solution: a hydraulic cylinder end sealing structure, including a cylinder body 1, a piston rod 3 is arranged inside the cylinder body 1, a sealing ring is arranged between the piston rod 3 and the cylinder body 1, a supporting dustproof mechanism 2 is arranged on one side of the sealing ring, and a protective mechanism 4 is arranged on the outer side of the cylinder body 1. The supporting dustproof mechanism 2 can support the piston rod 3 from multiple directions to prevent the piston rod 3 from being laterally compressed so that the sealing ring is deformed and the gap is increased. At the same time, the surface of the piston rod 3 is cleaned when it is extended and retracted to prevent dust from entering, thereby effectively improving the sealing effect.

[0027] The supporting dustproof mechanism 2 includes a supporting sleeve 201, which is fixedly installed at the end of the cylinder body 1, and the supporting sleeve 201 is detachably connected to the cylinder body 1 by bolts, which is convenient for disassembly and replacement. A plurality of supporting steel balls 202 are installed on the inner wall of the supporting sleeve 201, and the plurality of supporting steel balls 202 are movably connected to the inner wall of the supporting sleeve 201, and the plurality of supporting steel balls 202 are evenly arranged inside the supporting sleeve 201, and the supporting steel balls 202 can be used to support the piston rod 3 in multiple directions to prevent the piston rod 3 from being laterally compressed so that the sealing ring is deformed and the gap is increased. A first scraper ring 203 and a second scraper ring 204 are arranged on the outer side of the plurality of supporting steel balls 202, and a pressure block 205 is fixedly connected to the first scraper ring 203 and the second scraper ring 204, and a reset is arranged on one side of the pressure block 205 Spring 206, a spring seat 207 is provided on one side of the return spring 206, and the spring seat 207 is fixedly installed on the inner wall of the support sleeve 201. The two ends of the return spring 206 are fixedly connected to the pressure block 205 and the spring seat 207 respectively. The return spring 206 can be used to reset the pressure block 205, so that the first scraper ring 203 and the second scraper ring 204 can be reset. The surfaces of the opposite sides of the first scraper ring 203 and the second scraper ring 204 are both provided with movable tooth grooves 208, and a rotating disk 209 is provided between the two movable tooth grooves 208. A fan-shaped tooth block 210 is fixedly connected to the rotating disk 209, and a rotating shaft 211 is fixedly connected to the end of the rotating disk 209. The rotating disk 209 is rotatably connected to the inner wall of the support sleeve 201 through the rotating shaft 211. The rotating disk 209 is arranged on the first scraper ring 203 and the second scraper ring 204, so that when the rotating disk 209 rotates, the fan-shaped tooth block 210 can be driven to release the movable tooth groove 208 on the first scraper ring 203 and the second scraper ring 204 in turn, so that the first scraper ring 203 and the second scraper ring 204 can be driven to rotate to a certain extent in turn. A reset spring 212 is installed on the rotating shaft 211, which can reset the rotating shaft 211. A winding roller 213 is fixedly connected to the rotating shaft 211, and a driving rope 214 is fixedly connected to the winding roller 213. The end of the driving rope 214 is fixedly connected to a mounting ring 215, and a plurality of mounting bolts 216 are provided on the mounting ring 215. The mounting ring 215 matches the piston rod 3, and the mounting ring 215 is fixedly installed on the piston rod 3 through a plurality of mounting bolts 216. , so that when the piston rod 3 is extended or retracted, the driving rope 214 can be driven by the mounting ring 215 to cooperate with the reset spring 212 to drive the rotating shaft 211 to rotate continuously. The mounting ring 215 can be fixedly installed on the piston rod 3, and a plurality of supporting steel balls 202 can be used to support the piston rod 3 to prevent the piston rod 3 from being lateral pressed to cause the sealing ring to deform and increase the gap. At the same time, the piston rod 3 is extended or retracted to drive the driving rope 214 to move, and the movement of the driving rope 214 pulls the winding roller 213 to rotate, and the rotation of the winding roller 213 drives the rotating shaft 211 to rotate, and the rotation of the rotating shaft 211 drives the rotating disk 209 to rotate, and the rotation of the rotating disk 209 drives the sector tooth block 210 to rotate, so that the sector tooth block 210 is engaged with the movable tooth grooves 208 on the first scraper ring 203 and the second scraper ring 204 in turn.Thus, the sector tooth block 210 drives the first scraper ring 203 and the second scraper ring 204 to rotate to a certain extent in turn, and cooperates with the reset spring 206 to perform rotational reset, so that the continuously rotating first scraper ring 203 and the second scraper ring 204 clean the dust on the piston rod 3, preventing dust from entering the interior, and effectively improving the sealing effect.

[0028] See also Figure 1 and Figure 4 The protection mechanism 4 includes a first protection seat 401 and a second protection seat 402. The cylinder body 1 is arranged between the first protection seat 401 and the second protection seat 402. Four support rods 403 are arranged between the first protection seat 401 and the second protection seat 402. Each support rod 403 is fixedly connected with a connecting screw 404 at both ends. The connecting screw 404 is threadedly connected with a connecting nut 405. The cylinder body 1 can be fixed between the first protection seat 401 and the second protection seat 402, and the support rod 403 can be installed using the connecting nut 405 and the connecting screw 404, so as to protect the cylinder body 1 and prevent the surface of the cylinder body 1 from being worn.

[0029] During operation, the mounting ring 215 is fixedly installed on the piston rod 3, and a plurality of supporting steel balls 202 are used to support the piston rod 3 to prevent the piston rod 3 from being subjected to lateral pressure, causing the sealing ring to deform and increase the gap. At the same time, the piston rod 3 is extended and retracted to drive the driving rope 214 to move, and the driving rope 214 moves to pull the winding roller 213 to rotate. The rotation of the winding roller 213 drives the rotating shaft 211 to rotate, and the rotation of the rotating shaft 211 drives the rotating disk 209 to rotate. The rotation of the rotating disk 209 drives the sector tooth block 210 to rotate, so that the sector tooth block 210 is engaged with the movable tooth grooves 208 on the first scraper ring 203 and the second scraper ring 204 in turn, so that the sector tooth block 210 drives the first scraper ring 203 and the second scraper ring 204 to rotate to a certain extent in turn, and at the same time cooperates with the reset spring 206 to perform rotational reset, so that the continuously rotating first scraper ring 203 and the second scraper ring 204 clean the dust on the piston rod 3 to prevent dust from entering the interior, thereby effectively improving the sealing effect.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A hydraulic cylinder end sealing structure, comprising a cylinder body (1), characterized in that: A piston rod (3) is provided inside the cylinder body (1), a sealing ring is provided between the piston rod (3) and the cylinder body (1), a supporting dustproof mechanism (2) is provided on one side of the sealing ring, and a protective mechanism (4) is provided on the outside of the cylinder body (1); The supporting dustproof mechanism (2) comprises a supporting sleeve (201), a plurality of supporting steel balls (202) are mounted on the inner wall of the supporting sleeve (201), a first scraper ring (203) and a second scraper ring (204) are arranged outside the plurality of supporting steel balls (202), a pressing block (205) is fixedly connected to the first scraper ring (203) and the second scraper ring (204), a return spring (206) is arranged on one side of the pressing block (205), a spring seat (207) is arranged on one side of the return spring (206), and movable teeth are arranged on the surfaces of the first scraper ring (203) and the second scraper ring (204) on the opposite side. A rotating disc (209) is provided between two movable tooth grooves (208), a sector tooth block (210) is fixedly connected to the rotating disc (209), a rotating shaft (211) is fixedly connected to the end of the rotating disc (209), a reset spring (212) is installed on the rotating shaft (211), a winding roller (213) is fixedly connected to the rotating shaft (211), a driving rope (214) is fixedly connected to the winding roller (213), a mounting ring (215) is fixedly connected to the end of the driving rope (214), and a plurality of mounting bolts (216) are provided on the mounting ring (215).

2. A hydraulic cylinder end sealing structure according to claim 1, characterized in that: The support sleeve (201) is fixedly mounted on the end of the cylinder body (1), and the support sleeve (201) is detachably connected to the cylinder body (1) via bolts.

3. The hydraulic cylinder end sealing structure according to claim 1, characterized in that: The plurality of support steel balls (202) are movably connected to the inner wall of the support sleeve (201), and the plurality of support steel balls (202) are evenly arranged inside the support sleeve (201).

4. The hydraulic cylinder end sealing structure according to claim 1, characterized in that: The spring seat (207) is fixedly mounted on the inner wall of the support sleeve (201), and two ends of the return spring (206) are respectively fixedly connected to the pressing block (205) and the spring seat (207).

5. The hydraulic cylinder end sealing structure according to claim 1, characterized in that: The rotating disk (209) is rotatably connected to the inner wall of the support sleeve (201) via a rotating shaft (211), and the rotating disk (209) is arranged between the first scraping ring (203) and the second scraping ring (204).

6. The hydraulic cylinder end sealing structure according to claim 1, characterized in that: The mounting ring (215) matches the piston rod (3), and the mounting ring (215) is fixedly mounted on the piston rod (3) via a plurality of mounting bolts (216).

7. The hydraulic cylinder end sealing structure according to claim 1, characterized in that: The protection mechanism (4) comprises a first protection seat (401) and a second protection seat (402), and the cylinder body (1) is arranged between the first protection seat (401) and the second protection seat (402).

8. A hydraulic cylinder end sealing structure according to claim 7, characterized in that: Four support rods (403) are provided between the first protection seat (401) and the second protection seat (402), and both ends of each support rod (403) are fixedly connected with a connecting screw (404), and a connecting nut (405) is threadedly connected to the connecting screw (404).

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