Connecting rod bushing structure

Abstract

The utility model discloses a connecting rod bush, and belongs to the technical field of engine connecting rods, the connecting rod bush comprises a piston, a bush and a connecting rod, a placing groove is formed in the piston, a piston pin is arranged in the placing groove, the bush is arranged on the outer side wall of the piston pin in a sleeving manner, and the connecting rod is connected to the bush; a detachable dustproof cover is arranged in the containing groove, the side wall of the connecting rod abuts against the dustproof cover, and a fixing assembly for fixing the dustproof cover is arranged in the containing groove. The present application has an effect of reducing the possibility of oil dirt formation between the connecting rod bushing and the piston pin.

Description

Technical Field

[0001] The present application relates to the technical field of engine connecting rods, and in particular to a connecting rod bushing structure. Background Art

[0002] Connecting rod bushing is a part or component used in machinery, industry and other fields. As an important mechanical part, it plays a key role in protecting equipment, reducing wear and improving performance. It provides additional support and protection at key parts of the equipment to reduce wear and friction of components. It is widely used in various machinery and equipment, especially in high-load and high-friction environments.

[0003] The connecting rod bushing connects the piston to the connecting rod through the piston pin and supports the piston pin. During the operation of the engine, the connecting rod bushing is subjected to a large alternating load, and the piston pin generates a composite friction with sliding friction as the main friction and rolling friction as the auxiliary friction relative to the connecting rod bushing. This relative sliding allows the piston pin to rotate freely in the connecting rod bushing, thereby ensuring the effective connection and movement coordination between the piston and the connecting rod. Lubricating oil is added between the connecting rod bushing and the piston pin to reduce friction damage, but after a long time, dust in the air will stick to the lubricating oil, forming oil stains, affecting the connection between the connecting rod bushing and the piston pin, and may affect the operation of the equipment. Utility Model Content

[0004] In order to reduce the possibility of oil stains forming between a connecting rod bushing and a piston pin, the present application provides a connecting rod bushing structure.

[0005] The present application provides a connecting rod bushing structure adopting the following technical solution:

[0006] A connecting rod bushing structure includes a piston, a bushing and a connecting rod, wherein a placement groove is provided in the piston, a piston pin is provided in the placement groove, the bushing is sleeved on the outer side wall of the piston pin, and the connecting rod is connected to the bushing; a detachable dust cover is provided in the placement groove, the dust cover is retractable, the connecting rod abuts against the dust cover, and a fixing component for fixing the dust cover is provided in the placement groove.

[0007] By adopting the above technical solution, after installing the bushing, the staff installs the dust cover in the placement groove and fixes the dust cover through the fixing assembly, thereby reducing the possibility of the dust cover being detached; when the connecting rod moves, the telescopicity of the dust cover can reduce the resistance to the movement of the connecting rod, and the dust cover can improve the cleanliness of the placement groove, reduce the entry of dust, and then reduce the possibility of oil stains forming between the connecting rod bushing and the piston pin.

[0008] Preferably, the bushing comprises an inner lining layer and an outer lining layer, an intermediate layer is provided between the inner lining layer and the outer lining layer, and the intermediate layer is made of elastic material.

[0009] By adopting the above technical solution, an intermediate layer for installing elastic material is provided inside the bushing to absorb and disperse the impact force generated by the connecting rod during operation.

[0010] Preferably, the dust cover includes a first connecting rod, a second connecting rod and a bellows cover. The bellows cover is arranged between the first connecting rod and the second connecting rod. Both ends of the bellows cover are fixedly connected to the side walls of the first connecting rod and the second connecting rod respectively. Sliding grooves are formed on the opposite inner walls of the placement groove, and the first connecting rod and the second connecting rod slide in the sliding grooves.

[0011] By adopting the above technical solution, connecting the two ends of the dust cover to the first connecting rod and the second connecting rod can simplify the installation of the two ends of the dust cover. The staff can tilt the first connecting rod and the second connecting rod relative to the placement groove and insert them into the placement groove. Subsequently, turn the first connecting rod and the second connecting rod upright, install the first connecting rod and the second connecting rod in the sliding grooves, and then move the first connecting rod and the second connecting rod towards each other, and use the bellows cover to block the entrance of the placement groove, thereby reducing the possibility of dust entering the placement groove.

[0012] Preferably, the fixing component includes a fixing block and a first spring. A fixing groove is formed on the inner wall of the sliding groove. The fixing block slides in the fixing groove. Both ends of the first spring are fixedly connected to the fixing block and the inner wall of the fixing groove respectively. An inclined surface is provided on the fixing block, the first connecting rod abuts against the inclined surface, and a slot for inserting the fixing block is formed on the first connecting rod.

[0013] By adopting the above technical solution, when the staff moves the first connecting rod to the top of the sliding groove, the first connecting rod first contacts the inclined surface on the fixing block, and pushes and compresses the first spring to move through the inclined surface. When the fixing block is completely in the fixing groove, the first connecting rod continues to move, and the fixing block slides on the side wall of the first connecting rod. When the first connecting rod moves to align with the slot, the fixing block is inserted into the slot under the push of the first spring, thereby fixing the first connecting rod, and further fixing one end of the dust cover, enhancing the dust-proof effect.

[0014] Preferably, a sliding groove is formed on the inner wall of the fixing groove, and a pull rod is fixedly connected to the fixing block. The pull rod slides in the sliding groove.

[0015] By adopting the above technical solution, when the staff wants to release the fixation of the first connecting rod, the staff pulls the pull rod to move in the sliding groove, and drives the fixing block to compress the first spring to move. When the fixing block disengages from the first connecting rod, the staff can move the first connecting rod and take it out of the sliding groove.

[0016] Preferably, a sliding groove and a connecting groove are formed in the side wall of the connecting rod. The sliding groove and the connecting groove are communicated with each other. A sliding block is fixedly connected to the side wall of the second connecting rod away from the bellows. The sliding block is slidably connected to the inner wall of the sliding groove. An abutting groove is formed in the connecting groove. An abutting block is slidably arranged in the abutting groove. A second spring is arranged in the abutting groove. Two ends of the second spring are respectively fixedly connected to the abutting block and the inner wall of the abutting groove. The sliding block abuts against the abutting block.

[0017] By adopting the above technical solution, after the first connecting rod is installed, the sliding block on the second connecting rod is inserted into the connecting groove. During the process of the sliding block entering the connecting groove, the sliding block abuts against and pushes the abutting block to compress the second spring and move. When the sliding block enters the connecting groove, the abutting block abuts against the sliding block under the elastic force of the second spring, thereby reducing the possibility of the sliding block sliding out of the connecting groove. When the connecting rod swings, the sliding block slides into the sliding groove, thereby reducing the possibility of the second connecting rod hindering the swing of the connecting rod.

[0018] Preferably, a rotating bead is rotatably arranged on the side wall of the second connecting rod. The rotating bead is in rolling connection with the inner wall of the sliding groove.

[0019] By adopting the above technical solution, when the connecting rod swings, the movement of the connecting rod will push the sliding block to drive the second connecting rod to slide in the sliding groove. The rotating bead can reduce the friction between the second connecting rod and the inner wall of the sliding groove.

[0020] Preferably, a shielding plate is arranged on the inner wall of the placing groove. The shielding plate abuts against the side wall of the connecting rod.

[0021] By adopting the above technical solution, the dust-proof cover is installed along the swinging direction of the connecting rod. At the position in the placing groove corresponding to the non-swinging state of the connecting rod, a shielding plate is used for dust prevention, so as to enhance the dust-proof effect in the placing groove.

[0022] To sum up, the present application includes at least one of the following beneficial technical effects:

[0023] 1. After installing the bushing, the staff installs the dust-proof cover in the placing groove and fixes the dust-proof cover through the fixing component, thereby reducing the possibility of the dust-proof cover coming off. When the connecting rod moves, the telescopic property of the dust-proof cover can reduce the movement hindrance to the connecting rod. The dust-proof cover can improve the cleanliness in the placing groove, reduce the entry of dust, and then reduce the possibility of forming oil dirt between the connecting rod bushing and the piston pin.

[0024] 2. An intermediate layer for installing elastic materials is arranged in the bushing to absorb and disperse the impact force generated during the operation of the connecting rod.

[0025] 3. When the staff moves the first connecting rod to the top of the sliding groove, the first connecting rod first contacts the inclined surface on the fixed block and pushes the fixed compression first spring to move through the inclined surface. When the fixed block is completely in the fixed groove, the first connecting rod continues to move, and the fixed block slides on the side wall of the first connecting rod. When the first connecting rod moves to align with the slot of the fixed block, the fixed block is inserted into the slot under the push of the first spring, thereby fixing the first connecting rod, and further fixing one end of the dust cover to enhance the dust shielding effect. Brief Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the prior art.

[0027] Figure 2 is a schematic diagram of the overall structure of a connecting rod bushing structure in an embodiment of the present application.

[0028] Figure 3 is a schematic diagram of the structure highlighting the fixing component in an embodiment of the present application.

[0029] Figure 4 is a schematic cross-sectional view of the bushing structure in an embodiment of the present application.

[0030] Figure 5 is a schematic diagram of the structure highlighting the rotating ball in an embodiment of the present application.

[0031] Figure 6 is a schematic diagram of the structure highlighting the abutting block in an embodiment of the present application.

[0032] Description of the Reference Numerals:

[0033] 1, piston; 2, bushing; 3, connecting rod; 4, placement groove; 5, piston pin; 6, dust cover; 7, fixing component; 8, inner lining layer; 9, outer lining layer; 10, intermediate layer; 11, first connecting rod; 12, second connecting rod; 13, bellows; 14, sliding groove; 15, fixed block; 16, first spring; 17, fixed groove; 18, inclined surface; 19, slot; 20, sliding groove; 21, pull rod; 22, sliding slot; 23, connecting slot; 24, slider; 25, shielding plate; 26, rotating ball; 27, abutting block; 28, second spring; 29, abutting groove. Detailed Embodiment

[0034] The following will further elaborate on the present application in conjunction with the attached Figure 1-6 drawings.

[0035] An embodiment of the present application discloses a connecting rod bushing structure, as Figure 1 shown, which includes a piston 1, a bushing 2, and a connecting rod 3. A placement groove 4 is formed in the piston 1, a piston pin 5 is arranged in the placement groove 4, the bushing 2 is sleeved on the outer side wall of the piston pin 5, and the connecting rod 3 is connected to the bushing 2.

[0036] As shown Figure 2 in the figure, two detachable dust covers 6 are arranged in the placement groove 4. The two dust covers 6 are respectively arranged at both ends of the connecting rod 3 and are arranged along the extending direction of the placement groove 4, that is, the swinging direction of the connecting rod 3; the side wall of the connecting rod 3 abuts against the dust cover 6, and the dust cover 6 has elasticity and can expand and contract along with the swinging of the connecting rod 3, so that the tightness between the dust cover 6 and the connection can be strengthened without affecting the swinging of the connecting rod 3. At the positions of the placement groove 4 that are not covered by the bellows, a baffle 25 is arranged to block dust, that is, when the connecting rod 3 is in the neutral position, there is a gap between the two side walls of the non-connected dust cover 6 and the inner wall of the placement groove 4, so as to improve the cleanliness in the placement groove 4.

[0037] As shown Figure 2 in the figure, the dust cover 6 includes a first connecting rod 11, a second connecting rod 12 and a bellows. The bellows is arranged between the first connecting rod 11 and the second connecting rod 12, and both ends of the bellows are respectively fixedly welded to the side wall of the first connecting rod 11 and the side wall of the second connecting rod 12; it is convenient for the staff to install the bellows. Sliding grooves 14 are formed on the opposite inner walls of the placement groove 4. The sliding grooves 14 are arranged along the extending direction of the placement groove 4, and the first connecting rod 11 and the second connecting rod 12 are slidably connected to the inner walls of the sliding grooves 14.

[0038] As shown Figure 3 in the figure, a fixing component 7 for fixing the first connecting rod 11 is arranged at one end of the sliding groove 14 away from the connecting rod 3. The fixing component 7 includes a fixing block 15 and a first spring 16. A fixing groove 17 is formed on the inner wall of the sliding groove 14. The fixing block 15 is in the shape of a cuboid, and the fixing block 15 is slidably connected to the inner wall of the fixing groove 17. Both ends of the first spring 16 are respectively fixedly welded to the fixing block 15 and the inner wall of the fixing groove 17. An inclined surface 18 is arranged at one end of the fixing block 15 away from the first spring 16. The first connecting rod 11 abuts against the inclined surface 18, and a slot 19 for inserting the fixing block 15 is formed on the side wall of the first connecting rod 11. When the staff moves the first connecting rod 11 to one end of the sliding groove 14 away from the connecting rod 3, the first connecting rod 11 abuts against the inclined surface 18 and pushes the first spring 16 to move by compression. When the fixing block 15 is completely in the fixing groove 17, the first connecting rod 11 continues to move, and the fixing block 15 slides on the side wall of the first connecting rod 11. When the first connecting rod 11 moves to align the fixing block 15 with the slot 19, the fixing block 15 is inserted into the slot 19 under the push of the first spring 16, so as to fix the first connecting rod 11, and further fix one end of the dust cover 6.

[0039] As shown Figure 3As shown, a chute 20 is provided on the inner wall of the fixing groove 17 and communicates with the outside. A pull rod 21 is fixedly welded on the fixing block 15. The pull rod 21 is cylindrical, and its axis is perpendicular to the fixing block 15. The pull rod 21 slides in the chute 20. When the staff needs to release the fixing effect of the first connecting rod 11, the staff pulls the pull rod 21 to move in the chute 20, and drives the fixing block 15 to compress the first spring 16 to move. When the fixing block 15 disengages from the first connecting rod 11, the staff can move the first connecting rod 11 and take it out of the sliding groove 14.

[0040] As Figure 4 shown, the bushing 2 includes an inner lining layer 8 and an outer lining layer 9. An intermediate layer 10 is provided between the inner lining layer 8 and the outer lining layer 9. The intermediate layer 10 is made of an elastic material and is used to absorb and disperse the impact force generated during the operation of the connecting rod 3. The inner lining layer 8 is made of a wear-resistant material and is used to reduce the friction between the connecting rod 3 and the bushing 2. The outer lining layer 9 is made of a hard material and is used to enhance the overall strength and wear resistance of the bushing 2. The intermediate layer 10 is made of rubber or silica gel material and has good elasticity and buffering performance.

[0041] As Figure 5 and Figure 6 shown, rolling beads 26 are respectively rotatably provided on both side walls at both ends of the second connecting rod 12. The rolling beads 26 are in rolling connection with the inner wall of the sliding groove 14. When the connecting rod 3 swings, the movement of the connecting rod 3 will push the slider 24 to drive the second connecting rod 12 to slide in the sliding groove 14. The rolling beads 26 can reduce the friction between the second connecting rod 12 and the inner wall of the sliding groove 14. A slider 24 is fixedly welded on the side of the second connecting rod 12 away from the bellows cover. The slider 24 is T-shaped. A sliding groove 22 and a connecting groove 23 are provided on the side wall of the connecting rod 3. The sliding groove 22 and the connecting groove 23 are communicated. The cross-section of the sliding groove 22 is T-shaped. An abutting groove 29 is provided on the inner wall of the connecting groove 23. An abutting block 27 slides in the abutting block groove. The abutting block 27 is spherical. A second spring 28 is provided in the abutting groove 29. Both ends of the second spring 28 are fixedly welded to the inner wall of the abutting groove 29 and the abutting block 27. The slider 24 abuts against the abutting block 27.

[0042] As Figure 2 and Figure 5 shown and combined with Figure 6As shown, after the bushing 2 is installed, the staff installs the dust cover 6 in the placement groove 4. The staff can tilt the first connecting rod 11 and the second connecting rod 12 relative to the placement groove 4 and insert them into the placement groove 4. Subsequently, the first connecting rod 11 and the second connecting rod 12 are rotated to the upright position, and the first connecting rod 11 and the second connecting rod 12 are slid in the sliding groove 14. Then, the first connecting rod 11 and the second connecting rod 12 are moved towards each other. The first connecting rod 11 is moved to the end of the sliding groove 14 away from the connecting rod 3. When the first connecting rod 11 is about to abut against the inner wall of the sliding groove 14 and the fixing block 15 is aligned with the insertion slot 19, the fixing block 15 is inserted into the insertion slot 19 under the push of the first spring 16, thereby fixing the first connecting rod 11 and further fixing one end of the dust cover 6. Subsequently, the staff pulls the second connecting rod 12 towards the connecting rod 3. When the slider 24 is inserted into the connecting groove 23, the slider 24 abuts against and pushes the abutting block 27 to compress the second spring 28 and move. When the slider 24 enters the connecting groove 23, the abutting block 27 abuts against the slider 24 under the action of the second spring 28, reducing the possibility of the slider 24 sliding out of the connecting groove 23. When the connecting rod 3 swings, the slider 24 slides from the connecting groove 23 into the sliding groove 22 and slides in the sliding groove 22, thereby reducing the possibility of the second connecting rod 12 hindering the swing of the connecting rod 3.

[0043] The implementation principle of the embodiment of the present application is as follows: Without affecting the swing of the connecting rod 3, the staff installs the dust cover 6 in the placement groove 4. One end of the dust cover 6 is fixedly connected to the end of the sliding groove 14 away from the connection through the fixing component 7, and the other end of the dust cover 6 is connected to the connecting rod 3. When the connecting rod 3 swings, it will push the dust cover 6 to expand and contract. The position not covered by the dust cover 6 is dust-proofed by the baffle 25, thereby improving the cleanliness in the placement groove 4, reducing the entry of dust, and then reducing the possibility of forming oil scale between the bushing 2 of the connecting rod 3 and the piston pin 5.

[0044] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A connecting rod bushing structure, comprising a piston (1), a bushing (2) and a connecting rod (3), wherein a placement groove (4) is provided in the piston (1), a piston pin (5) is provided in the placement groove (4), the bushing (2) is sleeved on the outer side wall of the piston pin (5), and the connecting rod (3) is connected to the bushing (2); characterized in that: A detachable dust cover (6) is arranged in the placement groove (4), the side wall of the connecting rod (3) abuts against the dust cover (6), and a fixing component (7) for fixing the dust cover (6) is arranged in the placement groove (4); The dust cover (6) comprises a first connecting rod (11), a second connecting rod (12) and an accordion cover, wherein the accordion cover is arranged between the first connecting rod (11) and the second connecting rod (12), and the two ends of the accordion cover are respectively fixedly connected to the side wall of the first connecting rod (11) and the side wall of the second connecting rod (12); the placement groove (4) is provided with a sliding groove (14) relative to the inner wall, and the first connecting rod (11) and the second connecting rod (12) slide in the sliding groove (14).

2. A connecting rod bushing structure according to claim 1, characterized in that: The bushing (2) comprises an inner lining layer (8) and an outer lining layer (9), an intermediate layer (10) is arranged between the inner lining layer (8) and the outer lining layer (9), and the intermediate layer (10) is made of elastic material.

3. A connecting rod bushing structure according to claim 1, characterized in that: The fixing assembly (7) comprises a fixing block (15) and a first spring (16); a fixing groove (17) is provided on the inner wall of the sliding groove (14); the fixing block (15) slides in the fixing groove (17); two ends of the first spring (16) are respectively fixedly connected to the fixing block (15) and the inner wall of the fixing groove (17); an inclined surface (18) is provided on the fixing block (15); the first connecting rod (11) abuts against the inclined surface (18); and a slot (19) is provided on the first connecting rod (11) for the fixing block (15) to be inserted into.

4. A connecting rod bushing structure according to claim 3, characterized in that: The inner wall of the fixed groove (17) is provided with a sliding groove (20), and a pull rod (21) is fixedly connected to the fixed block (15), and the pull rod (21) slides in the sliding groove (20).

5. A connecting rod bushing structure according to claim 1, characterized in that: A sliding groove (22) and a connecting groove (23) are provided on the side wall of the connecting rod (3), and the sliding groove (22) and the connecting groove (23) are connected. A sliding block (24) is fixedly connected to a side wall of the second connecting rod (12) away from the accordion cover, and the sliding block (24) is slidably connected to the inner wall of the sliding groove (22); an abutting groove (29) is provided in the connecting groove (23), and an abutting block (27) slides in the abutting groove (29), and a second spring (28) is provided in the abutting groove (29), and two ends of the second spring (28) are respectively fixedly connected to the abutting block (27) and the abutting groove (29), and the sliding block (24) abuts against the abutting block (27).

6. A connecting rod bushing structure according to claim 1, characterized in that: A rotating ball (26) is rotatably arranged on the side wall of the second connecting rod (12), and the rotating ball (26) is rollingly connected to the inner wall of the sliding groove (14).

7. A connecting rod bushing structure according to claim 1, characterized in that: A shield plate (25) is provided on the inner wall of the placement groove (4), and the shield plate (25) abuts against the side wall of the connecting rod (3).

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