Wear-resistant shaft sleeve

Abstract

The utility model discloses a wear-resistant shaft sleeve, which relates to the technical field of shaft sleeves, and comprises an upper shaft sleeve and a lower shaft sleeve, the bottom end of the upper shaft sleeve is in threaded connection with the lower shaft sleeve, the top end of the upper shaft sleeve and the bottom end of the lower shaft sleeve are respectively clamped with a protective cover, the top end of each protective cover is provided with an oil through hole, and the bottom end of each protective cover is clamped with a traction block. A traction groove is formed in the bottom end of the traction block. By the adoption of the structure, the angle of the second clamping block is adjusted to the position not corresponding to the second clamping groove, so that the point position of the protective cover can be effectively clamped, displacement of the protective cover is avoided, and when the protective cover needs to be maintained in the later period, the first clamping block is rotated, the angle of the second clamping block is adjusted to the position corresponding to the second clamping groove, and then the protective cover is clamped. And the first clamping grooves can be directly pulled out, so that the whole protective cover can be pulled out, a user can conveniently check or disassemble the inner side structures of the upper shaft sleeve and the lower shaft sleeve in the later period, and the effect of relatively facilitating later maintenance is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of bushing technology, and specifically relates to a wear-resistant bushing. Background Technology

[0002] Wear-resistant bushings are devices used to reduce wear between mechanical parts. They are usually made of materials with excellent wear resistance, including graphite, nylon, polytetrafluoroethylene (PTFE), carbon fiber reinforced composites, and various metal alloys. Wear-resistant bushings have advantages such as low coefficient of friction, good anti-adhesion, fast wear resistance, and stable chemical properties. They are widely used in various mechanical systems that require reduced friction and wear to improve equipment operating efficiency and service life.

[0003] Chinese patent with publication number "CN212615927U" discloses a wear-resistant bushing, including a bushing body. A first annular groove is formed in the middle of the outer wall of the bushing body. Multiple oil inlet holes are formed inside the first annular groove. A wear-resistant liner is fixedly provided on the inner wall of the bushing body. Multiple oil grooves are formed on the inner wall of the wear-resistant liner. The oil grooves formed in the middle of the inner wall of the wear-resistant liner are interconnected with the multiple oil inlet holes. The oil inlet holes allow grease to flow back into the inner wall of the bushing from the outside.

[0004] However, the above structure still has some shortcomings. Since the bushing is a consumable, it will inevitably suffer relative wear and tear after long-term use, and thus requires regular disassembly and maintenance. Because the bushing in the above structure is a whole, it is not easy to disassemble it, making it difficult to remove the corresponding structure installed inside the bushing, which will waste a lot of disassembly time and reduce the efficiency of later maintenance. Utility Model Content

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a wear-resistant bushing to solve the problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A wear-resistant bushing includes an upper bushing and a lower bushing. The lower bushing is threaded to the bottom end of the upper bushing. Protective covers are snapped onto the top end of the upper bushing and the bottom end of the lower bushing. An oil passage hole is opened at the top end of the protective cover. A traction block is snapped onto the bottom end of the protective cover. A traction groove is opened at the bottom end of the traction block, and the traction groove communicates with the oil passage hole. A first slot is opened at the top end of the protective cover, and the first slot penetrates both the protective cover and the top end of the upper bushing. A second slot is opened on the inner wall of the first slot. A circular groove is opened at the bottom end of the inner side of the first slot. A first locking block is snapped onto the inner side of the first slot. A second locking block that matches the second slot is fixedly connected to the outer side of the first locking block. The second locking block is snapped onto the inner side of the circular groove.

[0008] As a preferred technical solution, a retaining spring that matches the second retaining block is installed at the bottom inner side of the circular groove. The bottom end of the second retaining block is engaged with the top end of the retaining spring. A sealing block is fixedly connected to the top end of the first retaining block. The sealing block covers the top end of the first retaining groove. A first protrusion is fixedly connected to the top end of the sealing block. The shape of the corner of the first protrusion is arc-shaped.

[0009] As a preferred technical solution, a rubber pad is fixedly connected to the top of the protective cover, the first slot is located on the inner side close to the rubber pad, and the top of the rubber pad is in contact with the bottom of the sealing block.

[0010] As a preferred technical solution, a limiting groove is provided at the bottom of the protective cover, and a limiting block that matches the limiting groove is fixedly connected to the top of the traction block. The limiting block is engaged inside the limiting groove, and the traction block is engaged at the bottom of the protective cover through the limiting groove and the limiting block. A second protrusion is fixedly connected to the bottom of the traction block.

[0011] As a preferred technical solution, the bottom end of the upper bushing is fixedly connected to a connecting frame, the outer wall of the connecting frame is provided with an external thread, the top end of the lower bushing is provided with a threaded groove that matches the external thread, the connecting frame is threaded to the inner side of the threaded groove through the external thread, and the lower bushing is threaded to the bottom end of the upper bushing through the connecting frame, the external thread and the threaded groove.

[0012] As a preferred technical solution, a sealing ring is fixedly connected to the top of the lower bushing. The sealing ring is three millimeters thick and is located on the inner side of the connecting frame. The top of the sealing ring is in contact with the bottom of the upper bushing.

[0013] As a preferred technical solution, both the upper and lower bushings are provided with wear-resistant layers inside, and the wear-resistant layers cover the interior of both the upper and lower bushings. The thickness of the wear-resistant layers is five millimeters, and the wear-resistant layers are made of copper alloy material.

[0014] In summary, the present invention has the following main advantages:

[0015] Firstly, the presence of the first locking block facilitates the insertion of the second locking block into the circular groove. By adjusting the angle of the second locking block to a position that does not correspond to the second slot, the protective cover can be effectively engaged, preventing displacement. When maintenance is required later, the first locking block can be rotated to adjust the angle of the second locking block to a position corresponding to the second slot, allowing it to be directly pulled out of the first slot. This enables the entire protective cover to be removed, facilitating the user's inspection or disassembly of the inner structure of the upper and lower bushings, thus achieving a relatively convenient maintenance effect.

[0016] Secondly, the presence of the oil passage hole facilitates the user's addition of oil to the inner sides of the upper and lower bushings. When pouring oil, the traction block guides the poured oil into the traction groove, which then flows into the inner side of the upper bushing. This ensures that the poured oil is evenly distributed throughout the inner side of the upper bushing. Excess oil can continue to flow downwards, reaching the traction block installed on the lower bushing, and then flowing into the traction groove structure on the lower bushing. Finally, it flows out through the oil passage hole on the lower bushing, thus achieving a good and uniform oil addition effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the top structure of the protective cover of this utility model;

[0019] Figure 3 This is a schematic diagram of the bottom structure of the protective cover of this utility model;

[0020] Figure 4 This is a schematic diagram of the inner structure of the upper bushing of this utility model;

[0021] Figure 5 This is a utility model Figure 4 A magnified structural diagram of part A;

[0022] Figure 6 This is a schematic diagram of the first card block structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the traction block structure of this utility model;

[0024] Figure 8 This is a schematic diagram of the oil passage structure of this utility model;

[0025] Figure 9 This is a schematic diagram of the top structure of the lower bushing of this utility model.

[0026] Reference numerals: 1. Upper bushing; 2. Lower bushing; 3. Connecting frame; 4. External thread; 5. Threaded groove; 6. Sealing ring; 7. Protective cover; 8. Oil passage hole; 9. Traction block; 10. First slot; 11. Second slot; 12. Circular groove; 13. Snap ring; 14. First locking block; 15. Second locking block; 16. Sealing block; 17. First protrusion; 18. Rubber pad; 19. Traction groove; 20. Second protrusion; 21. Limiting groove; 22. Limiting block; 23. Wear-resistant layer. Detailed Implementation

[0027] Example

[0028] refer to Figures 1 to 9This embodiment of a wear-resistant bushing includes an upper bushing 1 and a lower bushing 2. The bottom end of the upper bushing 1 is threadedly connected to the lower bushing 2. Protective covers 7 are snapped onto the top ends of both the upper bushing 1 and the lower bushing 2. An oil passage hole 8 is provided at the top end of the protective cover 7. A traction block 9 is snapped onto the bottom end of the protective cover 7. A traction groove 19 is provided at the bottom end of the traction block 9, communicating with the oil passage hole 8. A first slot 10 is provided at the top end of the protective cover 7, penetrating both the protective cover 7 and the top end of the upper bushing 1. A second slot 11 is provided on the inner wall of the first slot 10. A circular groove 12 is provided at the bottom inner side of the first slot 10. A first locking block 14 is snapped onto the inner side of the first slot 10. A second locking block 15, matching the second slot 11, is fixedly connected to the outer side of the first locking block 14. 5 is snapped into the inner side of the circular groove 12. The connection between the upper bushing 1 and the lower bushing 2 can form an integral bushing, thus not hindering normal use later. Due to the presence of the first snapping block 14, it is easy for the second snapping block 15 to be inserted into the circular groove 12. Adjusting the angle of the second snapping block 15 to a position that is not corresponding to the second slot 11 can effectively snap the protective cover 7 into place, thus preventing displacement. When maintenance is required later, rotate the first snapping block 14 and adjust the angle of the second snapping block 15 to a position corresponding to the second slot 11, so that it can be directly pulled out of the first slot 10 to remove the entire protective cover 7. This facilitates the user to inspect or disassemble the inner structure of the upper bushing 1 and the lower bushing 2, thus achieving a relatively convenient maintenance effect.

[0029] refer to Figures 1 to 6 A retaining spring 13 matching the second retaining block 15 is installed at the bottom inner side of the circular groove 12. The bottom end of the second retaining block 15 is engaged with the top end of the retaining spring 13. A sealing block 16 is fixedly connected to the top end of the first retaining block 14. The sealing block 16 covers the top end of the first retaining groove 10. A first protrusion 17 is fixedly connected to the top end of the sealing block 16. The shape of the corner of the first protrusion 17 is arc-shaped. Due to the presence of the retaining spring 13, the engagement of the retaining spring 13 can perform secondary engagement on the second retaining block 15, which can improve the stability of the engagement of the second retaining block 15 and also effectively improve the stability of the engagement of the protective cover 7.

[0030] refer to Figures 1 to 6 A rubber pad 18 is fixedly connected to the top of the protective cover 7. The first slot 10 is located on the inner side close to the rubber pad 18. The top of the rubber pad 18 is in contact with the bottom of the sealing block 16. Due to the presence of the rubber pad 18, which is made of rubber, it has good anti-slip ability and rubber elasticity. When the first locking block 14 is pressed down, the pressing down of the sealing block 16 will also squeeze the rubber pad 18, thereby making the first locking block 14 more tightly screwed, so as to further improve the stability of the locking of the second locking block 15.

[0031] refer to Figures 1 to 3 The bottom end of the protective cover 7 has a limiting groove 21. The top end of the traction block 9 is fixedly connected to a limiting block 22 that matches the limiting groove 21. The limiting block 22 is engaged inside the limiting groove 21. The traction block 9 is engaged at the bottom end of the protective cover 7 through the limiting groove 21 and the limiting block 22. The bottom end of the traction block 9 is fixedly connected to a second protrusion 20. Due to the opening of the oil passage 8, it is convenient for the user to add oil to the inside of the upper bushing 1 and the lower bushing 2. When emptying oil, the traction block 9... The poured oil can be slid into the traction groove 19 and then flow into the inner side of the upper bushing 1 through the traction groove 19. This allows the poured oil to be evenly distributed to various parts of the inner side of the upper bushing 1. Excess oil can continue to flow downwards and then flow to the traction block 9 installed on the lower bushing 2. It then flows into the traction groove 19 structure on the lower bushing 2 and finally flows out through the oil passage hole 8 on the lower bushing 2, thus achieving a good effect of uniform oil addition.

[0032] refer to Figure 1 and Figure 9 The bottom end of the upper bushing 1 is fixedly connected to a connecting frame 3. The outer wall of the connecting frame 3 is provided with an external thread 4. The top end of the lower bushing 2 is provided with a threaded groove 5 that matches the external thread 4. The connecting frame 3 is threadedly connected to the inner side of the threaded groove 5 through the external thread 4. The lower bushing 2 is threadedly connected to the bottom end of the upper bushing 1 through the connecting frame 3, the external thread 4, and the threaded groove 5. The opening of the threaded groove 5 facilitates the screwing in of the connecting frame 3, so as to effectively fix the installation point of the lower bushing 2 and prevent it from shifting. When it needs to be disassembled later, the connecting frame 3 can be screwed out directly, which can facilitate the disassembly of the entire bushing later, thereby further improving the convenience of maintenance of the inner side of the entire bushing.

[0033] refer to Figure 9 A sealing ring 6 is fixedly connected to the top of the lower bushing 2. The sealing ring 6 is three millimeters thick and is located on the inner side of the connecting frame 3. The top of the sealing ring 6 is in contact with the bottom of the upper bushing 1. Due to the presence of the sealing ring 6, it can effectively seal the connection point between the upper bushing 1 and the lower bushing 2, thereby achieving a good dustproof and waterproof effect.

[0034] refer to Figure 1 Both the upper bushing 1 and the lower bushing 2 have a wear-resistant layer 23 inside, which covers the inside of the upper bushing 1 and the lower bushing 2. The wear-resistant layer 23 is five millimeters thick and is made of copper alloy. Due to the presence of the wear-resistant layer 23, the copper alloy has a good strengthening and wear-resistant effect, which can effectively improve the overall wear resistance inside the upper bushing 1 and the lower bushing 2, thereby improving the service life of the overall bushing.

[0035] Operating principle and advantages: In use, the second locking block 15 is inserted into the circular groove 12. The angle of the second locking block 15 is adjusted so that it does not correspond to the second groove 11, thus effectively locking the protective cover 7 at point 7 to prevent displacement. When maintenance is required later, the first locking block 14 is rotated, and the angle of the second locking block 15 is adjusted to correspond to the second groove 11, allowing it to be directly pulled out of the first groove 10, so that the entire protective cover 7 can be removed. This facilitates the user's later inspection or disassembly of the inner structure of the upper bushing 1 and the lower bushing 2. To achieve relatively convenient later maintenance, the presence of the retaining spring 13 allows for secondary engagement of the second retaining block 15, thereby improving the stability of the engagement at the second retaining block 15 and also effectively enhancing the stability of the engagement at the protective cover 7. The presence of the rubber pad 18, made of rubber, provides excellent anti-slip properties and elasticity. When the first retaining block 14 is pressed down, the pressing down of the sealing block 16 also compresses the rubber pad 18, making the first retaining block 14 more tightly screwed in, further improving the stability of the engagement. The stability of the 15-point locking mechanism of the two locking blocks is facilitated by the opening of the oil passage 8, allowing the user to add oil to the inner sides of the upper bushing 1 and the lower bushing 2. When pouring oil, the traction block 9 can pull the poured oil into the traction groove 19, and then the oil flows into the inner side of the upper bushing 1 through the traction groove 19. This allows the poured oil to be evenly distributed to various parts of the inner side of the upper bushing 1. Excess oil can continue to flow downwards, then flow to the traction block 9 installed on the lower bushing 2, and then flow into the traction groove 19 structure on the lower bushing 2. Finally, the oil flows through the traction groove 19 structure on the lower bushing 2. Oil flows out through the oil passage 8, thus achieving a good and uniform oil addition effect. Due to the opening of the threaded groove 5, it is convenient to screw in the connecting frame 3, so as to effectively fix the installation point of the lower bushing 2 and prevent it from shifting. When it needs to be disassembled later, the connecting frame 3 can be unscrewed directly, thus achieving the effect of convenient disassembly of the entire bushing later, and further improving the convenience of maintenance of the inner side of the entire bushing. Due to the presence of the sealing ring 6, the sealing ring 6 can effectively seal the connection point of the upper bushing 1 and the lower bushing 2, thus achieving a good dustproof and waterproof effect.

Claims

1. A wear sleeve comprising an upper sleeve and a lower sleeve, characterised in that: The bottom end of the upper shaft sleeve is threadedly connected with a lower shaft sleeve, the top end of the upper shaft sleeve and the bottom end of the lower shaft sleeve are clamped with protective covers, the top end of the protective cover is provided with an oil hole, the bottom end of the protective cover is clamped with a traction block, the bottom end of the traction block is provided with a traction groove, the traction groove is communicated with the oil hole, the top end of the protective cover is provided with a first clamping groove, the first clamping groove penetrates the protective cover and the top end of the upper shaft sleeve, the inner wall of the first clamping groove is provided with a second clamping groove, the inner side of the first clamping groove is provided with a circular groove, the first clamping groove is clamped with a first clamping block, the outer side of the first clamping block is fixedly connected with a second clamping block matched with the second clamping groove, and the second clamping block is clamped in the circular groove.

2. A wear sleeve according to claim 1, characterised in that: The inner side of the circular groove is provided with a clamping spring matched with the second clamping block, the bottom end of the second clamping block is clamped on the top end of the clamping spring, the top end of the first clamping block is fixedly connected with a sealing block, the sealing block covers the top end of the first clamping groove, the top end of the sealing block is fixedly connected with a first protruding block, and the shape of the corner of the first protruding block is arc-shaped.

3. A wear sleeve according to claim 2, wherein: The top end of the protective cover is fixedly connected with a rubber pad, the first clamping groove is located on the inner side close to the rubber pad, and the top end of the rubber pad is attached to the bottom end of the sealing block.

4. A wear sleeve according to claim 1, wherein: The bottom end of the protective cover is provided with a limiting groove, the top end of the traction block is fixedly connected with a limiting block matched with the limiting groove, the limiting block is clamped in the limiting groove, the traction block is clamped on the bottom end of the protective cover through the limiting groove and the limiting block, and the bottom end of the traction block is fixedly connected with a second protruding block.

5. A wear sleeve according to claim 1, wherein: The bottom end of the upper shaft sleeve is fixedly connected with a connecting frame, an outer thread is formed on the outer wall of the connecting frame, the top end of the lower shaft sleeve is provided with a threaded groove matched with the outer thread, the connecting frame is threadedly connected to the inner side of the threaded groove through the outer thread, and the lower shaft sleeve is threadedly connected to the bottom end of the upper shaft sleeve through the connecting frame, the outer thread and the threaded groove.

6. A wear sleeve according to claim 1, wherein: The top end of the lower shaft sleeve is fixedly connected with a sealing ring, the thickness of the sealing ring is three millimeters, the sealing ring is located on the inner side close to the connecting frame, and the top end of the sealing ring is attached to the bottom end of the upper shaft sleeve.

7. A wear sleeve according to claim 1, wherein: The interiors of the upper shaft sleeve and the lower shaft sleeve are both provided with wear-resistant layers, the wear-resistant layers cover the interiors of the upper shaft sleeve and the lower shaft sleeve, the thickness of the wear-resistant layer is five millimeters, and the wear-resistant layer is made of copper alloy material.

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