Self-lubricating fisheye joint

Abstract

The utility model relates to the technical field of fisheye joints, in particular to a self-lubricating fisheye joint which comprises an outer ring and an inner ring, the inner ring is arranged in the outer ring, the outer wall of the inner ring is fixedly connected with a plurality of protruding blocks, the outer side of the outer ring is fixedly connected with a plurality of oil injection ports, and the outer sides of the inner walls of the oil injection ports are in threaded connection with a sealing cover. When the inner ring moves in the outer ring, the multiple protruding blocks of the inner ring move, and the protruding blocks make contact with the connecting blocks in the circumferential movement process, the connecting blocks drive the second magnetic blocks to slide outwards along the inner wall of the sleeve, the distance between the first magnetic blocks and the second magnetic blocks is shortened, abutting between the connecting blocks and the outer ring is relieved, and therefore the sealing effect is achieved. And when the convex block and the connecting block are not in contact, the repulsive force between the convex block and the connecting block acts on the second magnetic block to drive the connecting block to seal the oil outlet of the outer ring.

Description

Technical Field

[0001] The utility model relates to the technical field of fisheye joints, in particular to a self-lubricating fisheye joint. Background Art

[0002] Fisheye joint is also called rod end spherical bearing. Spherical bearing is a spherical sliding bearing. The basic type is composed of inner and outer rings with spherical sliding spherical contact surfaces. Spherical bearing is mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface.

[0003] For example, the authorization announcement number CN208831495U is a fisheye joint with a self-lubricating function. In the above document, when the rubber column and the limit column are in contact, the lubricating oil inside the installation box is injected into the inner ring of the fisheye joint, thereby improving the self-lubricating efficiency of the fisheye joint and improving work efficiency. When the rubber column and the limit column are separated, under the elastic action of the spring, the lubricating oil inside the installation box stops being injected into the inner ring of the fisheye joint, thereby saving lubricating oil and avoiding waste. However, during use, the fisheye joint in the above document stops being injected into the inner ring of the fisheye joint under the elastic action of the spring. Due to long-term use, the elasticity of the spring is easily weakened, which easily causes the rubber column to loosen and the lubricating oil to leak, affecting the lubrication effect of the fisheye joint. Utility Model Content

[0004] The utility model aims to solve the problem that the sealing performance of the oil outlet is weakened due to long-term use of the spring, causing the lubricating oil to leak and affect the lubrication effect of the inner ring, and proposes a self-lubricating fisheye joint.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A self-lubricating fisheye joint is designed, comprising an outer ring and an inner ring, wherein the inner ring is arranged inside the outer ring, the outer wall of the inner ring is fixedly connected to a plurality of protrusions, the outer side of the outer ring is fixedly connected to a plurality of oil filling ports, the outer side of the inner wall of the oil filling port is threadedly connected to a sealing cover, self-lubricating structures are arranged on both sides of the outer ring, the bottom end of the outer ring is fixedly connected to a vertical rod, the bottom of the vertical rod is fitted with an output end of a hydraulic lever, and a connecting structure is arranged on the outer side of the vertical rod.

[0007] Preferably, the connecting structure includes a spring, the bottom end of the spring is fixedly connected to the vertical rod, the top end of the spring is fixedly connected to the sleeve block, the outer ends of the sleeve block are fixedly connected to the square tube, the outer side of the square tube is rotatably connected to the connecting rod through a pin, the bottom of the connecting rod is rotatably connected to the cross rod through a pin, and the two side grooves of the cross rod are slidably connected to multiple sliders.

[0008] Preferably, the middle portion of the outer wall of the cross bar is slidably connected to the vertical bar, and the inner side of the outer wall of the cross bar fits with the output end of the hydraulic lever.

[0009] Preferably, the outer ends of the plurality of sliding blocks are fixedly connected to the vertical rod, and the outer walls of the plurality of sleeve blocks are slidably connected to the vertical rod.

[0010] Preferably, the self-lubricating structure includes a sleeve, the outer end of the sleeve is fixedly connected to the outer ring, the outer side of the inner wall of the sleeve is fixedly connected to the first magnetic block, the inner side of the inner wall of the sleeve is slidably connected to the second magnetic block, the inner end of the second magnetic block is fixedly connected to the connecting block, the outer side of the outer wall of the connecting block is slidably connected to the sleeve, and the inner end of the first magnetic block and the outer end of the second magnetic block have the same magnetic pole.

[0011] Preferably, the inner end of the connecting block is tightly abutted against the outer ring.

[0012] The utility model proposes a self-lubricating fisheye joint, which has the beneficial effect that: when the inner ring moves inside the outer ring, the multiple protrusions of the inner ring move, and during the circular motion of the protrusions, the protrusions contact the connecting blocks, so that the connecting blocks drive the second magnetic block to slide outward along the inner wall of the sleeve, so that the distance between the first magnetic block and the second magnetic block is shortened, so that the connecting block and the outer ring are released from being tightly pressed, and the lubricating oil flows out through the oil outlet of the outer ring to realize automatic lubrication of the inner ring. When the protrusions and the connecting blocks are released from contact, the repulsive force between the two acts on the second magnetic block to drive the connecting block to seal the oil outlet of the outer ring. The original method is replaced by this method, which avoids the problem that the sealing of the oil outlet is weakened due to long-term use of the spring, causing the lubricating oil to leak and affect the lubrication effect of the inner ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from above;

[0016] Figure 4 It is a structural schematic diagram of the square tube and the sleeve block of the utility model.

[0017] In the figure: 1, outer ring, 2, oil filling port, 3, self-lubricating structure, 301, sleeve, 302, first magnetic block, 303, second magnetic block, 304, connecting block, 4, connecting structure, 401, spring, 402, sleeve block, 403, square tube, 404, connecting rod, 405, cross bar, 406, slider, 5, sealing cover, 6, inner ring, 7, bump, 8, vertical rod, 9, hydraulic lever output end. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Embodiment 1:

[0020] See attached Figure 1-4 A self-lubricating fisheye joint comprises an outer ring 1 and an inner ring 6. The inner ring 6 is arranged inside the outer ring 1. The outer wall of the inner ring 6 is fixedly connected to a plurality of protrusions 7. The outer side of the outer ring 1 is fixedly connected to a plurality of oil filling ports 2. The outer side of the inner wall of the oil filling port 2 is threadedly connected to a sealing cover 5. The sealing rod 5 is rotated to disconnect the sealing cover 5 from the oil filling port 2. The lubricating oil is injected into the inner part of the outer ring 1 through the oil filling port 2. The sealing cover 5 is then connected to the oil filling port 2, thereby sealing the oil filling port 2 to prevent leakage of the lubricating oil. Self-lubricating structures 3 are arranged on both sides of the outer ring 1. The bottom end of the outer ring 1 is fixedly connected to a vertical rod 8. The bottom of the vertical rod 8 fits with the output end 9 of the hydraulic lever. A connecting structure 4 is arranged on the outer side of the vertical rod 8.

[0021] The connecting structure 4 includes a spring 401, the bottom end of the spring 401 is fixedly connected to the vertical rod 8, the top end of the spring 401 is fixedly connected to the sleeve 402, and the outer ends of the sleeve 402 are fixedly connected to the square tube 403. The user moves the square tube 403 downward, and the square tube 403 drives the sleeve 402 to move downward along the slide groove of the vertical rod 8. The sleeve 402 drives the spring 401 to compress, and the square tube 403 drives the outer connecting rod 404 to rotate at the same time, and the connecting rod 404 drives the cross bar 405 to slide outward along the outer wall of the slider 406;

[0022] Then, the vertical rod 8 is connected to the hydraulic cylinder output end 9, and the cross rod 405 is matched with the groove of the hydraulic cylinder output end 9, and the square tube 403 is loosened. The elastic force of the spring 401 drives the square tube 403 to move upward through the sleeve block 402, so that the cross rod 405 is engaged with the groove of the hydraulic cylinder output end 9, thereby realizing the connection between the fisheye joint and the external hydraulic cylinder. The outer side of the square tube 403 is rotatably connected to the connecting rod 404 through a pin shaft, and the bottom of the connecting rod 404 is rotatably connected to the cross rod 405 through a pin shaft. The two side grooves of the cross rod 405 are slidably connected to multiple sliders 406, and the middle part of the outer wall of the cross rod 405 is slidably connected to the vertical rod 8. The inner side of the outer wall of the cross rod 405 is fitted with the hydraulic lever output end 9, the outer ends of multiple sliders 406 are fixedly connected to the vertical rod 8, and the outer walls of multiple sleeve blocks 402 are slidably connected to the vertical rod 8.

[0023] The self-lubricating structure 3 includes a sleeve 301, the outer end of the sleeve 301 is fixedly connected to the outer ring 1, and the outer side of the inner wall of the sleeve 301 is fixedly connected to the first magnetic block 302. When the inner ring 6 moves inside the outer ring 1, the multiple protrusions 7 of the inner ring 6 move. During the circular motion of the protrusions 7, the protrusions 7 contact the connecting block 304, so that the connecting block 304 drives the second magnetic block 303 to slide outward along the inner wall of the sleeve 301, so that the distance between the first magnetic block 302 and the second magnetic block 303 is shortened, so that the connecting block 304 and the outer ring 1 are released from the tight contact, so that the lubricating oil passes through the outer ring 1. The oil outlet of ring 1 realizes automatic lubrication of the inner ring 6. When the protrusion 7 and the connecting block 304 are released from contact, the repulsive force between the two acts on the second magnetic block 303 to drive the connecting block 304 to seal the oil outlet of the outer ring 1. The inner side of the inner wall of the sleeve 301 is slidingly connected to the second magnetic block 303, the inner end of the second magnetic block 303 is fixedly connected to the connecting block 304, the outer side of the outer wall of the connecting block 304 is slidingly connected to the sleeve 301, the inner end of the first magnetic block 302 and the outer end of the second magnetic block 303 have the same magnetic pole, and the inner end of the connecting block 304 is tightly against the outer ring 1.

[0024] Working principle:

[0025] The user moves the square tube 403 downward, and the square tube 403 drives the sleeve 402 to move downward along the slide groove of the vertical rod 8, and the sleeve 402 drives the spring 401 to compress, and the square tube 403 drives the outer connecting rod 404 to rotate at the same time, and the connecting rod 404 drives the cross bar 405 to slide outward along the outer wall of the slider 406;

[0026] Then, the vertical rod 8 is connected to the hydraulic cylinder output end 9, and the cross rod 405 is aligned with the groove of the hydraulic cylinder output end 9, and the square tube 403 is loosened. The elastic force of the spring 401 drives the square tube 403 to move upward through the sleeve 402, so that the cross rod 405 is engaged with the groove of the hydraulic cylinder output end 9, thereby realizing the connection between the fisheye joint and the external hydraulic cylinder. This method replaces the original connection method and makes the connection of the fisheye joint more convenient.

[0027] Subsequently, the inner ring of the fisheye joint is connected to the external component, so that when the inner ring 6 moves inside the outer ring 1, the multiple protrusions 7 of the inner ring 6 move. During the circular movement of the protrusion 7, the protrusion 7 contacts the connecting block 304, so that the connecting block 304 drives the second magnetic block 303 to slide outward along the inner wall of the sleeve 301, so that the distance between the first magnetic block 302 and the second magnetic block 303 is shortened, so that the connecting block 304 and the outer ring 1 are released from being pressed tightly, and the lubricating oil flows out through the oil outlet of the outer ring 1 to realize automatic lubrication of the inner ring 6. When the protrusion 7 and the connecting block 304 are released from contact, the repulsive force between the two acts on the second magnetic block 303 to drive the connecting block 304 to seal the oil outlet of the outer ring 1. This method replaces the original method, and avoids the problem that the sealing of the oil outlet is weakened due to long-term use of the spring, causing the lubricating oil to leak and affect the lubrication effect of the inner ring.

[0028] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A self-lubricating fisheye joint, comprising an outer ring (1) and an inner ring (6), wherein the inner ring (6) is arranged inside the outer ring (1), wherein: The outer wall of the inner ring (6) is fixedly connected to a plurality of protrusions (7), the outer side of the outer ring (1) is fixedly connected to a plurality of oil filling ports (2), the outer side of the inner wall of the oil filling port (2) is threadedly connected to the sealing cover (5), self-lubricating structures (3) are provided on both sides of the outer ring (1), the bottom end of the outer ring (1) is fixedly connected to the vertical rod (8), the bottom of the vertical rod (8) is in contact with the output end (9) of the hydraulic lever, the outer side of the vertical rod (8) is provided with a connecting structure (4), the self-lubricating structure (3) includes a sleeve (301), and the sleeve (301 ) is fixedly connected to the outer ring (1), the outer side of the inner wall of the sleeve (301) is fixedly connected to the first magnetic block (302), the inner side of the inner wall of the sleeve (301) is slidably connected to the second magnetic block (303), the inner end of the second magnetic block (303) is fixedly connected to the connecting block (304), the outer side of the outer wall of the connecting block (304) is slidably connected to the sleeve (301), the inner end of the first magnetic block (302) and the outer end of the second magnetic block (303) have the same magnetic pole, and the inner end of the connecting block (304) is tightly abutted against the outer ring (1).

2. A self-lubricating fisheye joint according to claim 1, characterized in that: The connection structure (4) comprises a spring (401), the bottom end of the spring (401) is fixedly connected to the vertical rod (8), the top end of the spring (401) is fixedly connected to the sleeve (402), the outer ends of the sleeve (402) are fixedly connected to the square tube (403), the outer side of the square tube (403) is rotationally connected to the connecting rod (404) through a pin shaft, the bottom of the connecting rod (404) is rotationally connected to the cross rod (405) through a pin shaft, and the two side grooves of the cross rod (405) are slidably connected to a plurality of sliders (406).

3. A self-lubricating fisheye joint according to claim 2, characterized in that: The middle part of the outer wall of the cross bar (405) is slidably connected to the vertical bar (8), and the inner side of the outer wall of the cross bar (405) is in contact with the output end (9) of the hydraulic lever.

4. A self-lubricating fisheye joint according to claim 2, characterized in that: The outer ends of the plurality of sliding blocks (406) are fixedly connected to the vertical rod (8), and the outer walls of the plurality of sleeve blocks (402) are slidably connected to the vertical rod (8).

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