Anti-stuck chain shaft structure

Abstract

The utility model belongs to the technical field of chain pin shafts, and particularly relates to an anti-stuck chain shaft structure. The utility model includes a sleeve body and a pin shaft, and the sleeve body is provided with a rotation cavity for the supply pin shaft to rotate axially. During the assembly process of the utility model, the supply pin shaft is first inserted into the rotation cavity in the sleeve body, so that the supply pin shaft can rotate axially along the axis of the sleeve body, and then the dustproof and anti-stuck kit is sleeved on both ends of the supply pin shaft of the sleeve body, and the dustproof and anti-stuck kit is synchronously rotated with the supply pin shaft through interference fit, and the inner recessed annular groove is used to accommodate the dustproof and anti-stuck kit, which is convenient for the dustproof and anti-stuck kit to rotate. When in use, the dustproof and anti-stuck kit can cover the gap between the sleeve body and the pin shaft to prevent dust, debris, impurities, etc. from entering the rotation area between the sleeve body and the pin shaft, and prevent the pin shaft from getting stuck under the premise of preventing the pin shaft from rotating, thereby reducing the frequency of maintenance and replacement.

Description

Technical Field

[0001] The utility model belongs to the technical field of chain pin shafts and relates to an anti-stuck chain shaft structure. Background Art

[0002] In all chains including roller chains, sleeve chains, conveyor chains, etc., a pin is used to form a hinge pair consisting of inner and outer links. The pin is an important component of the chain, and its service life is directly related to the life cycle and production cost of the chain. When the existing pin rotates with the sleeve, dust, debris and impurities are easy to enter the rotating area between the sleeve and the pin. Once the rotating area is filled with impurities, the pin is prone to jamming, the maintenance and replacement frequency is high, manual maintenance is troublesome, and the service life of parts is also short. Therefore, it is urgent to design an anti-jamming chain shaft structure that can overcome the above defects.

[0003] In order to overcome the shortcomings of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a chain pin [application number: 201810020266.0], including a sleeve, a left connecting chain plate, a fixing sleeve, a first plug-in hole, a center connecting chain plate, a plug-in, a steel ball, a spring, a right connecting chain plate, a limit hole, a rotating shaft, a second plug-in hole, an oil outlet groove hole, a graphene ball, an oil storage cavity and a cotton thread. Utility Model Content

[0004] The utility model aims to provide a chain shaft structure to prevent jamming in view of the above problems.

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

[0006] A chain shaft structure with an anti-stuck condition comprises a sleeve body and a pin, wherein the sleeve body is provided with a rotating cavity for axial rotation of the pin, both ends of the sleeve body have outer extended convex portions, an inner recessed annular groove is formed between the outer extended convex portion and the pin, both ends of the pin are provided with dustproof and anti-stuck kits, the dustproof and anti-stuck kits are interference fit with the pin, the dustproof and anti-stuck kits are located in the inner recessed annular groove and the positions of the dustproof and anti-stuck kits and the rotating cavity correspond.

[0007] In the above-mentioned anti-stuck chain shaft structure, the dustproof and anti-stuck kit includes dustproof and anti-stuck sleeves arranged at both ends of the pin shaft, the cross-section of the dustproof and anti-stuck sleeve is annular, and the inner wall of the dustproof and anti-stuck sleeve is interference fit with the outer wall of the pin shaft.

[0008] In the above-mentioned anti-stuck chain shaft structure, the outer diameter of the dust-proof and anti-stuck sleeve is smaller than the inner diameter of the outer extended protrusion, and a rotation gap is formed between the dust-proof and anti-stuck sleeve and the outer extended protrusion.

[0009] In the above-mentioned anti-jamming chain shaft structure, the thickness of the dustproof and anti-jamming sleeve plate is smaller than the depth of the sunken annular groove.

[0010] In the above-mentioned anti-stuck chain shaft structure, the pin shaft is composed of a middle section body and a rotating connecting body, the middle section body and the rotating connecting body are integrally formed, and the middle section body is located in the rotating cavity.

[0011] In the above-mentioned anti-jamming chain shaft structure, the diameter of the middle section body is larger than the diameter of the rotating connector, and the inner wall of the dustproof and anti-jamming sleeve plate is interference fit with the outer wall of the rotating connector.

[0012] In the above-mentioned anti-jamming chain shaft structure, both ends of the sleeve body further have inner extended convex parts, and the outer extended convex part and the inner extended convex part are respectively integrally formed with the sleeve body.

[0013] In the above-mentioned anti-jamming chain shaft structure, the inner side of the dust-proof and anti-jamming sleeve plate is in contact with the inner extended protrusion.

[0014] In the above-mentioned anti-jamming chain shaft structure, a heat dissipation and chip cleaning annular groove is formed between the outer extended protrusion and the inner extended protrusion, and the heat dissipation and chip cleaning annular groove is communicated with the inner recessed annular groove.

[0015] In the above-mentioned anti-jamming chain shaft structure, the outer diameter of the dust and anti-jamming sleeve plate is smaller than the outer diameter of the heat dissipation and chip cleaning ring groove.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. During the assembly process of the utility model, the supply pin is first inserted into the rotating cavity in the shaft sleeve body, so that the supply pin can rotate axially along the axis of the shaft sleeve body, and then the dustproof and anti-jamming kit is sleeved on both ends of the supply pin of the shaft sleeve body. The dustproof and anti-jamming kit and the supply pin are rotated synchronously through interference fit. The inner recessed annular groove is used to accommodate the dustproof and anti-jamming kit, which is convenient for the rotation of the dustproof and anti-jamming kit. When in use, the dustproof and anti-jamming kit can cover the gap between the shaft sleeve body and the pin, preventing dust, debris and impurities from entering the rotating area between the shaft sleeve body and the pin, preventing the pin from getting stuck while avoiding the rotation of the pin, reducing the frequency of maintenance and replacement, and increasing the service life of parts.

[0018] 2. The thickness of the dustproof and anti-jamming sleeve in the utility model is less than the depth of the sunken ring groove, and an embedded structure is adopted. On the one hand, the production cost of the dustproof and anti-jamming sleeve can be reduced, and on the other hand, the dustproof and anti-jamming sleeve can be prevented from colliding with other connecting parts, and the structure is compact and reasonable.

[0019] 3. The outer diameter of the dust and anti-jamming sleeve in the utility model is smaller than the outer diameter of the heat dissipation and chip cleaning ring groove, ensuring the formation of a connected heat dissipation channel to avoid overheating and damage to components. At the same time, a connected structure is adopted to facilitate the subsequent cleaning of dust and debris.

[0020] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an assembly schematic diagram of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the sleeve body.

[0023] Figure 3 It is a cross-sectional schematic diagram of the dust and anti-stuck sleeve.

[0024] In the figure: the sleeve body 1, the pin 2, the rotating cavity 3, the outer extended convex part 4, the inner sunken annular groove 5, the dust and anti-jamming kit 6, the dust and anti-jamming sleeve plate 7, the rotating gap 8, the middle section body 9, the rotating connecting body 10, the inner extended convex part 11, and the heat dissipation and chip cleaning annular groove 12. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-3 As shown, an anti-stuck chain shaft structure includes a sleeve body 1 and a pin 2, wherein the sleeve body 1 is provided with a rotating cavity 3 for axial rotation of the pin 2, both ends of the sleeve body 1 have outer extension convex portions 4, and an inner recessed annular groove 5 is formed between the outer extension convex portion 4 and the pin 2, and both ends of the pin 2 are sleeved with a dustproof and anti-stuck kit 6, the dustproof and anti-stuck kit 6 is interference fit with the pin 2, the dustproof and anti-stuck kit 6 is located in the inner recessed annular groove 5 and the position of the dustproof and anti-stuck kit 6 corresponds to the rotating cavity 3.

[0027] In this embodiment, during the assembly process, the supply pin 2 is first inserted into the rotating cavity 3 in the sleeve body 1, so that the supply pin 2 can rotate axially along the axis of the sleeve body 1, and then the dustproof and anti-jamming kit 6 is sleeved on both ends of the supply pin 2 of the sleeve body 1. The dustproof and anti-jamming kit 6 and the supply pin 2 are rotated synchronously through interference fit. The recessed annular groove 5 is used to accommodate the dustproof and anti-jamming kit 6 to facilitate the rotation of the dustproof and anti-jamming kit 6. When in use, the dustproof and anti-jamming kit 6 can cover the gap between the sleeve body 1 and the pin 2 to prevent dust, debris, impurities, etc. from entering the rotating area between the sleeve body 1 and the pin 2. On the premise of preventing the pin 2 from rotating, the pin 2 is prevented from getting stuck, thereby reducing the frequency of maintenance and replacement and increasing the service life of components.

[0028] Combination Figure 1-3 As shown, the dustproof and anti-jamming kit 6 includes dustproof and anti-jamming sleeves 7 arranged at both ends of the pin shaft 2, the cross-section of the dustproof and anti-jamming sleeve 7 is annular, and the inner wall of the dustproof and anti-jamming sleeve 7 is interference fit with the outer wall of the pin shaft 2.

[0029] Specifically, the sunken annular groove 5 is used to accommodate the dustproof and anti-jamming sleeve plate 7 to facilitate the rotation of the dustproof and anti-jamming sleeve plate 7. When in use, the dustproof and anti-jamming sleeve plate 7 can cover the gap between the sleeve body 1 and the pin shaft 2 to prevent dust, debris and impurities from entering the rotating area between the sleeve body 1 and the pin shaft 2. On the premise of avoiding the rotation of the pin shaft 2, it can prevent the pin shaft 2 from getting stuck, reduce the frequency of maintenance and replacement, and increase the service life of parts.

[0030] The outer diameter of the dustproof and anti-seizing sleeve plate 7 is smaller than the inner diameter of the outer extended protrusion 4 , and a rotation gap 8 is formed between the dustproof and anti-seizing sleeve plate 7 and the outer extended protrusion 4 .

[0031] In this embodiment, a rotation gap 8 is formed between the dustproof and anti-jamming sleeve 7 and the outer extended protrusion 4 to prevent the outer wall of the dustproof and anti-jamming sleeve 7 from colliding with the inner wall of the outer extended protrusion 4 during rotation, thereby ensuring smooth rotation.

[0032] Combination Figure 1 As shown, the thickness of the dustproof and anti-stuck sleeve plate 7 is less than the depth of the sunken annular groove 5 .

[0033] In this embodiment, the thickness of the dustproof and anti-jamming sleeve 7 is less than the depth of the sunken annular groove 5, and an embedded structure is adopted. On the one hand, the production cost of the dustproof and anti-jamming sleeve 7 can be reduced, and on the other hand, the dustproof and anti-jamming sleeve 7 can be prevented from colliding with other connecting parts, and the structure is compact and reasonable.

[0034] The pin shaft 1 is composed of a middle section body 9 and a rotating connecting body 10 . The middle section body 9 and the rotating connecting body 10 are integrally formed, and the middle section body 9 is located in the rotating cavity 3 .

[0035] In this embodiment, the pin shaft 2 is composed of a middle section body 9 and a rotating connecting body 10 . The middle section body 9 is rotationally matched with the sleeve body 1 . The rotating connecting body 10 is used to connect and fix the dustproof and anti-stuck sleeve plate 7 .

[0036] Combination Figure 1 As shown, the diameter of the middle section body 9 is larger than the diameter of the rotating connecting body 10 , and the inner wall of the dustproof and anti-jamming sleeve plate 7 is interference fit with the outer wall of the rotating connecting body 10 .

[0037] In this embodiment, the diameter of the middle section body 9 is larger than the diameter of the rotating connecting body 10, which can facilitate the dust-proof and anti-jamming sleeve plate 7 to cover the gap between the sleeve body 1 and the pin shaft 2, thereby preventing dust, debris and impurities from entering the rotating area between the sleeve body 1 and the pin shaft 2.

[0038] The two ends of the sleeve body 1 also have inner extension convex parts 11 , the outer extension convex part 4 and the inner extension convex part 11 are respectively formed integrally with the sleeve body 1 , and the inner side of the dustproof and anti-stuck sleeve plate 7 is in contact with the inner extension convex part 11 .

[0039] In this embodiment, the inner extended protrusion 11 is used to abut against the inner side of the dustproof and anti-jamming sleeve 7 to prevent the dustproof and anti-jamming sleeve 7 from deflecting.

[0040] Combination Figure 1-2 As shown, a heat dissipation and chip cleaning annular groove 12 is formed between the outer extended protrusion 4 and the inner extended protrusion 11 , and the heat dissipation and chip cleaning annular groove 12 is communicated with the inner recessed annular groove 5 .

[0041] In this embodiment, the heat dissipation and chip cleaning ring groove 12 can facilitate heat dissipation during operation, and at the same time adopts a connected structure to facilitate subsequent cleaning of dust and debris.

[0042] Combination Figure 1-3 As shown, the outer diameter of the dust and anti-jamming sleeve plate 7 is smaller than the outer diameter of the heat dissipation and chip cleaning ring groove 12 .

[0043] In this embodiment, the outer diameter of the dust and anti-jamming sleeve plate 7 is smaller than the outer diameter of the heat dissipation and chip cleaning ring groove 12, ensuring the formation of a connected heat dissipation channel to avoid overheating and damage to components.

[0044] The working principle of the utility model is:

[0045] During the assembly process, first insert the supply pin shaft 2 into the rotating cavity 3 in the sleeve body 1, so that the supply pin shaft 2 can rotate axially along the axis of the sleeve body 1, and then the dustproof and anti-jamming kit 6 is sleeved on both ends of the supply pin shaft 2 of the sleeve body 1. The dustproof and anti-jamming kit 6 and the supply pin shaft 2 are rotated synchronously through interference fit. The inner ring groove 5 is used to accommodate the dustproof and anti-jamming sleeve plate 7 to facilitate the rotation of the dustproof and anti-jamming sleeve plate 7. When in use, the dustproof and anti-jamming sleeve plate 7 can cover the gap between the sleeve body 1 and the pin shaft 2 to prevent dust, debris and impurities from entering the rotating area between the sleeve body 1 and the pin shaft 2. On the premise of preventing the pin shaft 2 from rotating, it can prevent the pin shaft 2 from getting stuck, reduce the frequency of maintenance and replacement, and increase the service life of parts.

[0046] A rotation gap 8 is formed between the dustproof and anti-stuck sleeve plate 7 and the outer extension convex portion 4 to prevent the outer wall of the dustproof and anti-stuck sleeve plate 7 from colliding with the inner wall of the outer extension convex portion 4 during rotation, thereby ensuring smooth rotation.

[0047] The thickness of the dustproof and anti-stuck sleeve plate 7 is less than the depth of the sunken annular groove 5. The embedded structure can reduce the production cost of the dustproof and anti-stuck sleeve plate 7 on the one hand, and avoid the dustproof and anti-stuck sleeve plate 7 from colliding with other connecting parts on the other hand. The structure is compact and reasonable. The pin shaft 2 is composed of a middle section body 9 and a rotating connector 10. The middle section body 9 and the sleeve body 1 are rotatably matched. The rotating connector 10 is used to connect and fix the dustproof and anti-stuck sleeve plate 7. The diameter of the middle section body 9 is larger than the diameter of the rotating connector 10, which can facilitate the dustproof and anti-stuck sleeve plate 7 to cover the gap between the sleeve body 1 and the pin shaft 2, and prevent dust, debris and impurities from entering the rotating area between the sleeve body 1 and the pin shaft 2.

[0048] The inner extension convex portion 11 is used to position the inner side of the dustproof and anti-jamming sleeve 7 to prevent the dustproof and anti-jamming sleeve 7 from deflecting.

[0049] The heat dissipation and chip cleaning ring groove 12 can dissipate heat conveniently during operation, and adopts a connected structure to facilitate the subsequent cleaning of dust and debris.

[0050] The outer diameter of the dustproof and anti-jamming sleeve plate 7 is smaller than the outer diameter of the heat dissipation and chip cleaning ring groove 12, so as to ensure the formation of a connected heat dissipation channel and avoid the situation where overheating damages the components.

[0051] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0052] Although the present invention uses more terms such as sleeve body 1, pin 2, rotating cavity 3, outer extension convex part 4, inner recessed annular groove 5, dust and anti-seizure kit 6, dust and anti-seizure sleeve plate 7, rotating gap 8, middle section body 9, rotating connecting body 10, inner extension convex part 11, heat dissipation and chip cleaning annular groove 12, etc., it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of the utility model. It is contrary to the spirit of the utility model to interpret them as any additional restrictions.

Claims

1. A chain shaft structure for preventing jamming, comprising a sleeve body (1) and a pin (2), characterized in that: The shaft sleeve body (1) is provided with a rotating cavity (3) for axially rotating the pin shaft (2). The two ends of the shaft sleeve body (1) are provided with outer extension protrusions (4). An inner recessed annular groove (5) is formed between the outer extension protrusions (4) and the pin shaft (2). The two ends of the pin shaft (2) are provided with dustproof and anti-jamming kits (6). The dustproof and anti-jamming kit (6) is interference-fitted with the pin shaft (2). The dustproof and anti-jamming kit (6) is located in the inner recessed annular groove (5) and the position of the dustproof and anti-jamming kit (6) corresponds to the rotating cavity (3).

2. The anti-stuck chain shaft structure according to claim 1, characterized in that: The dustproof and anti-jamming kit (6) comprises dustproof and anti-jamming sleeves (7) arranged at both ends of the pin shaft (2); the cross section of the dustproof and anti-jamming sleeves (7) is annular; the inner wall of the dustproof and anti-jamming sleeves (7) is interference fit with the outer wall of the pin shaft (2).

3. The anti-stuck chain shaft structure according to claim 2, characterized in that: The outer diameter of the dustproof and anti-jamming sleeve (7) is smaller than the inner diameter of the outer extended protrusion (4), and a rotation gap (8) is formed between the dustproof and anti-jamming sleeve (7) and the outer extended protrusion (4).

4. The anti-stuck chain shaft structure according to claim 3, characterized in that: The thickness of the dustproof and anti-jamming sleeve plate (7) is smaller than the depth of the sunken annular groove (5).

5. The anti-stuck chain shaft structure according to claim 4, characterized in that: The pin shaft (2) is composed of a middle section body (9) and a rotating connecting body (10); the middle section body (9) and the rotating connecting body (10) are integrally formed; and the middle section body (9) is located in the rotating cavity (3).

6. The anti-stuck chain shaft structure according to claim 5, characterized in that: The diameter of the middle section body (9) is greater than the diameter of the rotating connecting body (10), and the inner wall of the dustproof and anti-jamming sleeve plate (7) is interference-fitted with the outer wall of the rotating connecting body (10).

7. The anti-stuck chain shaft structure according to claim 6, characterized in that: Both ends of the shaft sleeve body (1) also have inner extension convex portions (11), and the outer extension convex portion (4) and the inner extension convex portion (11) are respectively formed integrally with the shaft sleeve body (1).

8. The anti-stuck chain shaft structure according to claim 7, characterized in that: The inner side of the dustproof and anti-jamming sleeve plate (7) is in contact with the inner extended protrusion (11).

9. The anti-stuck chain shaft structure according to claim 8, characterized in that: A heat dissipation and chip cleaning annular groove (12) is formed between the outer extended convex portion (4) and the inner extended convex portion (11), and the heat dissipation and chip cleaning annular groove (12) is connected to the inner recessed annular groove (5).

10. The anti-stuck chain shaft structure according to claim 9, characterized in that: The outer diameter of the dust and anti-jamming sleeve plate (7) is smaller than the outer diameter of the heat dissipation and chip cleaning ring groove (12).

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