JP3152356U - chain - Google Patents

Abstract

A chain that reduces the number of parts, eliminates the need for conventional bushing press-fitting operations, and eliminates various problems associated with conventional caulking. A portion extending from a central portion 2A in the length direction of a pair of bushes 2 and 2 'to one inner plate 3 in a pair of inner plates 3 and 3', and a length direction of the pair of bushes 2 and 2 ' The central portion 2A to the other inner plate 3 'of the pair of inner plates 3, 3' are integrally formed by simultaneous molding. The respective parts are joined together at a pair of bushes 2, 2 'so as to be integrated as a whole. Therefore, the pair of bushes 2 and 2 'and the pair of inner plates 3 and 3' are integrally formed as a series without separate members. [Selection] Figure 2

Description

  The present invention relates to a chain.

  As a chain such as a power transmission chain, one having a structure as shown in FIGS. 3 to 6 is generally used.

  In the figure, reference numeral 100 denotes a chain, and bush press-fitting holes in which both ends of a pair of bushes 102, 102 on which rollers 101, 101 are rotatably fitted are formed in both ends of a pair of inner plates 103, 103, respectively. An inner link 105 press-fitted into 104 and 104, and an outer link formed by press-fitting both ends of a pair of pins 106 and 106 into pin press-fitting holes 108 and 108 formed in both ends of a pair of outer plates 107 and 107 109 and 109 are connected by the pins 106 and 106 passing through the bushes 102 and 102.

  In the conventional chain 100, the pair of inner plates 103 and 103 and the pair of bushes 102 and 102 are separate members in the inner link 105. Therefore, these two types of parts must be manufactured separately, and the manufacturing cost is high because of the double labor. In addition, the pair of inner plates 103, 103 and the pair of bushes 102, 102 are bush press-fit holes 104, 104 in which both ends of the pair of bushes 102, 102 are formed at both ends of the pair of inner plates 103, 103. This requires a process of press-fitting into and integrating them, which also requires a great deal of labor and time.

  In addition, the projecting ends of the bushes 102 and 102 are caulked at the time of the press-fitting. However, when this is done, the parts are deformed to reduce accuracy, and it is necessary to remove the generated burrs. There are various problems.

  The present invention has been made in view of the above points, and the bush and the inner plate in the inner link are integrally formed without using separate members to reduce the number of parts and eliminate the need to press-fit the conventional bush. Furthermore, the present invention intends to provide a chain that can solve various problems associated with conventional caulking.

  Thus, the gist of the present invention is that an inner link formed by coupling both ends of a pair of bushes, each of which is rotatably fitted with a roller, to both ends of a pair of inner plates, and a pair of pins In a chain formed by connecting both ends of the outer links formed by press-fitting into pin press-fitting holes formed in both ends of the pair of outer plates with the pins passing through the bushes, the pair of bushes in the inner links And a pair of inner plates are formed as a single unit without a separate member.

  Further, in the above configuration, as an example of means for integrally configuring the pair of bushes and the pair of inner plates without using separate members, one of the pair of inner plates from the center in the length direction of the pair of bushes. A portion extending from the central portion of the pair of bushes in the length direction to the other inner plate of the pair of inner plates is integrally formed by simultaneous molding, and each of the portions is paired with the pair of bushes. There may be mentioned means for joining in the bush and integrating them as a whole. In this means, simultaneous forming is performed by cold forging or casting means.

  The present invention is configured as described above. Since the bush and the inner plate of the inner link are integrally formed without using separate members, the bush and the inner which have been conventionally required to be separately manufactured separately. Two kinds of parts of the plate can be made by one kind of parts that are integrated into a series without the bush and the inner plate being separate members, so that the cost can be greatly reduced. The conventional press-fitting work of the bush can be made unnecessary. In addition, various problems associated with conventional caulking can be solved.

It is a front view of the inner link used in the chain concerning the present invention. It is the sectional view on the AA line in FIG. It is a front view of the inner link used in the conventional chain. FIG. 5 is a sectional view taken along line BB in FIG. 3. It is the top view which cut and showed a part of conventional chain. It is a front view of the conventional chain.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  In the figure, reference numeral 1 denotes an inner link used in the chain of the present invention. The overall structure of the chain of the present invention is the same as that of the conventional chain except for the inner link, and thus the description thereof is omitted.

  In addition, the inner link 1 is configured by integrally forming a pair of bushes 2 and 2 'and a pair of inner plates 3 and 3' without using separate members.

  In the present embodiment, the length of the pair of bushes 2, 2 ′ is used as means for integrally configuring the pair of bushes 2, 2 ′ and the pair of inner plates 3, 3 ′ without using separate members. Of the pair of inner plates 3, 3 ′ from the center portion 2 A in the direction to one inner plate 3, and from the center portion 2 A in the length direction of the pair of bushes 2, 2 ′ to the pair of inner plates 3, 3 ′ The other part of the inner plate 3 'is integrally formed by simultaneous molding, and the parts are joined together by a pair of bushes 2, 2' to be integrated as a whole. Yes. The roller (not shown) is externally fitted to each bush 2, 2 'prior to joining the bushes 2, 2'.

DESCRIPTION OF SYMBOLS 1 Inner link 2, 2 'pair of bush 2A Center part of a pair of bush length direction 3, 3' A pair of inner plate

Claims (2)

  An inner link formed by connecting both ends of a pair of bushes, each of which is rotatably fitted with a roller, to both ends of a pair of inner plates, and both ends of a pair of pins drilled in both ends of the pair of outer plates In the chain formed by connecting the outer link press-fitted into the pin press-fitting hole with the pin penetrating the bush, the pair of bushes and the pair of inner plates in the inner link are not used as separate members. A chain characterized by being constructed as a series.   A portion extending from the center in the length direction of the pair of bushes to one inner plate in the pair of inner plates, and a portion extending from the center in the length direction of the pair of bushes to the other inner plate in the pair of inner plates; The chain according to claim 1, wherein the two are integrally formed by simultaneous molding, and the parts are joined together by a pair of bushes.

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