S-shaped curve opening sleeve and chain link thereof

Abstract

The utility model discloses an S-shaped curve opening sleeve which comprises a sleeve body, an opening penetrating through the two ends of the sleeve body is formed in one side of the sleeve body, and the opening comprises a first straight line extending section, an S-shaped curve extending section and a second straight line extending section. The first linear extension section and the second linear extension section are both parallel to the axis of the sleeve body, and the first linear extension section is transited to the second linear extension section through the S-shaped curve extension section. The utility model provides an S-shaped curve opening sleeve and a chain link thereof. After the end of the sleeve is extruded, the two sides of an opening cannot be staggered.

Description

Technical Field

[0001] The utility model relates to the technical field of chains, in particular to an S-shaped curve opening sleeve and a chain link thereof. Background Art

[0002] The existing roller chain includes multiple links, each of which includes a sleeve and inner link plates installed at both ends of the sleeve. Among them, the patent application number CN201811622829X discloses an S-shaped open chain sleeve. This sleeve can reduce the wear of the sleeve, but the open ends of the sleeve extend obliquely to the ends of the sleeve. When the inner link plates are pressed onto the ends of the sleeve, the inner link plates squeeze the ends of the sleeve. Figure 4 As shown, the sleeve end 200 is contracted. Since the opening end is tilted, the left and right sides of the opening 300 are easily misaligned after being squeezed, which leads to irregular deformation of the sleeve. Utility Model Content

[0003] In order to solve the defect that two sides of an opening of an existing sleeve are easily staggered after the end portion is squeezed, the utility model provides an S-shaped curve opening sleeve, which can prevent the two sides of the opening from staggering after the end portion is squeezed.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An S-shaped curve opening sleeve includes a sleeve body. One side of the sleeve body is provided with an opening that passes through both ends of the sleeve body. The opening includes a first straight extension section, an S-shaped curve extension section and a second straight extension section. The first straight extension section and the second straight extension section are both parallel to the axis of the sleeve body. The first straight extension section transitions to the second straight extension section through the S-shaped curve extension section.

[0006] Through the above arrangement, the end of the opening extends in a straight line, and after the end of the sleeve body is squeezed, the two sides of the opening will not be staggered, thereby preventing the sleeve from being irregularly deformed during press-fitting.

[0007] Furthermore, the width of the opening is less than or equal to 0.1 mm.

[0008] Through the above arrangement, the opening is basically closed, further reducing the deformation of the sleeve body.

[0009] Furthermore, a carburized layer is provided on the outer side of the sleeve body, and the depth of the carburized layer is greater than or equal to 0.15 mm and less than or equal to 0.25 mm.

[0010] Through the above arrangement, the hardness of the outer surface of the sleeve body is improved, the deformation of the sleeve body is reduced, and the wear resistance of the outer side of the sleeve body is improved.

[0011] Furthermore, chamfers are provided on the outer peripheries of both ends of the sleeve body.

[0012] The above arrangement facilitates press-fitting of the sleeve end.

[0013] Furthermore, the ratio of the thickness of the sleeve body to the outer diameter of the sleeve body is less than or equal to 1 / 7.

[0014] Through the above arrangement, cracks on the surface of the sleeve body are reduced.

[0015] Furthermore, the first straight extension segment and the second straight extension segment are equal in length.

[0016] Furthermore, the first straight extension segment and the second straight extension segment are coaxially arranged.

[0017] A chain link includes two inner link plates and the above-mentioned sleeve. Both ends of the inner link plates are provided with mounting holes adapted to the outer diameter of the sleeve body. The two ends of the sleeve body are press-fitted into the mounting holes. The end faces of the sleeve body are basically flush with the outer sides of the inner link plates. The lengths of the first straight extension section and the second straight extension section are both greater than or equal to the thickness of the inner link plates.

[0018] Through the above arrangement, during the process of pressing the inner link plate onto the end of the sleeve body, the inner wall of the inner link plate is always within the projection of the first straight extension section on the outer surface of the sleeve body. The extrusion force is mainly resisted by the opposite side walls of the first straight extension section to prevent the end of the sleeve body from deformation.

[0019] Furthermore, a thickness ratio of the first straight extension section to the inner link plate is greater than or equal to 1 and less than or equal to 1.3. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a sleeve according to an embodiment.

[0021] Figure 2 Schematic diagram of a chain link according to an embodiment.

[0022] Figure 3 2 is a cross-sectional view of a chain link according to an embodiment.

[0023] Figure 4 Schematic diagram of the deformation of the end of my existing sleeve after being compressed. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be further specifically described below with reference to embodiments and in conjunction with the accompanying drawings.

[0025] like Figures 1 to 3As shown, an S-shaped curve opening sleeve includes a sleeve body 1. An opening 2 is provided on one side of the sleeve body 1 and passes through both ends of the sleeve body 1. The opening 2 includes a first straight extension section 21, an S-shaped curve extension section 22 and a second straight extension section 23. The first straight extension section 21 and the second straight extension section 23 are both parallel to the axis of the sleeve body 1. The first straight extension section 21 transitions to the second straight extension section 23 through the S-shaped curve extension section 22.

[0026] With the above arrangement, the end of the opening 2 extends in a straight line. After the end of the sleeve body 1 is squeezed, the two sides of the opening 2 will not be staggered, thereby preventing the sleeve from being irregularly deformed during press-fitting.

[0027] The opening 2 of the present application is small in width and is essentially closed, so as to reduce deformation of the sleeve during press-fitting. The opposite side walls of the first straight extension section 21 of the opening 2 are parallel to each other and are both parallel to the axis of the sleeve body 1. The opposite side walls of the second straight extension section 23 of the opening 2 are also parallel to each other and are both parallel to the axis of the sleeve body 1. During press-fitting, the end of the sleeve body 1 close to the first straight extension section 21 is squeezed, and the squeezing force is essentially perpendicular to the first straight extension section 21. When the opposite side walls of the first straight extension section 21 are squeezed against each other, they will not shift, thereby avoiding deformation of the end of the sleeve body 1. The same applies to the other end of the sleeve body 1. The middle S-shaped curve extension section 22 extends in an S-shape, which can specifically be extended in the shape of a sine function, to reduce wear between the sleeve and the pin during use.

[0028] As an implementation manner, the width W2 of the opening 2 is less than or equal to 0.1 mm.

[0029] Through the above arrangement, the opening 2 is basically closed, further reducing the deformation of the sleeve body 1.

[0030] As an implementation method, a carburized layer 3 is provided on the outer side of the sleeve body 1 , and the depth of the carburized layer 3 is greater than or equal to 0.15 mm and less than or equal to 0.25 mm.

[0031] Through the above arrangement, the hardness of the outer surface of the sleeve body 1 is improved, the deformation of the sleeve body 1 is reduced, and the wear resistance of the outer side of the sleeve body 1 is improved.

[0032] As an implementation method, chamfers 4 are provided on the outer periphery of both ends of the sleeve body 1 .

[0033] The above arrangement facilitates press-fitting of the sleeve end.

[0034] As an implementation manner, the ratio of the thickness t1 of the sleeve body 1 to the outer diameter of the sleeve body 1 is less than or equal to 1 / 7.

[0035] Through the above arrangement, cracks on the surface of the sleeve body 1 are reduced.

[0036] The sleeve body 1 of the present application is made of a piece of metal sheet rolled into a cylindrical structure. The smaller thickness of the sleeve body 1 and the increase in the outer diameter of the sleeve body 1 are conducive to reducing cracks on the surface of the sleeve body 1; in the present application, the thickness of the sleeve body 1 is approximately 9 mm, and the outer diameter of the sleeve body 1 is approximately 70 mm.

[0037] As an implementation manner, the length W1 of the first straight extension section 21 is equal to the length W1 of the second straight extension section 23 .

[0038] As an implementation manner, the first straight extension segment 21 and the second straight extension segment 23 are coaxially arranged.

[0039] A chain link includes two inner link plates 5 and the above-mentioned sleeve. Both ends of the inner link plates 5 are provided with mounting holes 6 adapted to the outer diameter of the sleeve body 1. The two ends of the sleeve body 1 are press-fitted into the mounting holes 6. The end surface of the sleeve body 1 is basically flush with the outer side of the inner link plate 5. The length of the first straight extension section 21 and the second straight extension section 23 are both greater than or equal to the thickness t2 of the inner link plate 5.

[0040] Through the above arrangement, when the inner link plate 5 is pressed into the end of the sleeve body 1, the inner wall of the inner link plate 5 is always within the projection of the first straight extension section 21 on the outer surface of the sleeve body 1. The extrusion force is mainly resisted by the opposite side walls of the first straight extension section 21 to prevent the end of the sleeve body 1 from deformation.

[0041] As an implementation manner, the thickness ratio of the first straight extension section 21 to the inner link plate 5 is greater than or equal to 1 and less than or equal to 1.3.

[0042] When the thickness ratio of the first straight extension section 21 to the inner link plate 5 is less than 1, the radial projection of the first straight extension section 21 on the outer surface of the sleeve body 1 cannot cover the inner wall of the inner link plate 5, and the deformation resistance of the end of the sleeve body 1 is reduced; when the thickness ratio of the first straight extension section 21 to the inner link plate 5 is greater than 1.3, the length of the middle S-shaped curve extension section 22 is reduced, and the wear resistance of the sleeve body 1 will be reduced.

[0043] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. An S-shaped curve opening sleeve, characterized in that: It includes a sleeve body, and one side of the sleeve body is provided with an opening that passes through both ends of the sleeve body, and the opening includes a first straight extension section, an S-shaped curve extension section and a second straight extension section, the first straight extension section and the second straight extension section are both parallel to the axis of the sleeve body, and the first straight extension section transitions to the second straight extension section through the S-shaped curve extension section.

2. The S-shaped curve opening sleeve according to claim 1, characterized in that: The width of the opening is less than or equal to 0.1 mm.

3. The S-shaped curve opening sleeve according to claim 1, characterized in that: A carburized layer is provided on the outer side of the sleeve body, and the depth of the carburized layer is greater than or equal to 0.15 mm and less than or equal to 0.25 mm.

4. The S-shaped curve opening sleeve according to claim 1, characterized in that: The outer peripheries of both ends of the sleeve body are provided with chamfers.

5. The S-shaped curve opening sleeve according to claim 1, characterized in that: The ratio of the thickness of the sleeve body to the outer diameter of the sleeve body is less than or equal to 1 / 7.

6. The S-shaped curve opening sleeve according to claim 1, characterized in that: The first straight extension segment and the second straight extension segment are equal in length.

7. The S-shaped curve opening sleeve according to claim 1, characterized in that: The first straight extension section and the second straight extension section are coaxially arranged.

8. A chain link, characterized in that: It comprises two inner link plates and the sleeve as claimed in claim 6, wherein both ends of the inner link plates are provided with mounting holes adapted to the outer diameter of the sleeve body, and both ends of the sleeve body are press-fitted into the mounting holes, and the end surface of the sleeve body is substantially flush with the outer side of the inner link plates, and the lengths of the first straight extension segment and the second straight extension segment are both greater than or equal to the thickness of the inner link plates.

9. A chain link according to claim 8, characterized in that: A thickness ratio of the first straight extension segment to the inner link plate is greater than or equal to 1 and less than or equal to 1.3.

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