JP2010127394A - Chain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chain preventing an outward warpage of an outer link plate without increasing the occupied space, and reduced in the weight without deteriorating the rupture strength. <P>SOLUTION: In the chain 100 having a plurality of inner link plates 120 and outer link plates 110 alternately connected, ribs 111 are projectedly provided on the outer link plate 110 at positions where the outer link plate 110 does not interfere with the inner link plate 120 at an upper and a lower end of a chain travel direction center part on a lateral side sliding on the inner link plate 120. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a chain used for a power transmission mechanism or a transport mechanism of an automobile, an industrial machine, or the like.

  Conventionally, a pair of left and right inner link plates, a cylindrical bush press-fitted at both ends to the inner link plate, a pair of left and right outer link plates arranged on both outer sides of the inner link plate, and the bush are rotatable. In a chain in which both ends are configured with connecting pins press-fitted to the outer link plate and the inner link plate and the outer link plate are alternately connected, the warpage of the outer link plate is reduced. Therefore, a chain provided with a rib extending in the chain traveling direction is well known.

As shown in FIGS. 6 to 8, these known chains 500 include an outer link in which a connecting pin 530 is fitted and fixed to a pin hole of a pair of outer link plates 510, and a bush hole of a pair of inner link plates 520. The inner link has a bush 540 fitted and fixed thereto, and the connecting pin 530 is loosely inserted into the bush 540 so that the outer link and the inner link are alternately connected.
In the case of a roller chain, a roller 550 is loosely inserted in the bush 540 so as to be rotatable.

The outer link plate 510 is formed with a rib 511 extending in the chain running direction on the opposite side of the side surface that is in sliding contact with the inner link plate 520. It is comprised so that the curvature of 510 to the outward may be prevented (for example, refer patent document 1).
Microfilm (No. 3, FIG. 2, FIG. 3, FIG. 4) of Japanese Utility Model No. 57-162146 (Japanese Utility Model Publication No. 59-30956)

However, such a known chain 500 has a problem in that the rib 511 is provided on the outer link plate 510 to increase the thickness outward and the space occupied by the chain 500 as a whole increases.
In addition, although the strength of the outer link plate 510 against breakage due to the tension of the chain 500 is sufficient, the ribs 511 cannot be reduced in weight, and the overall weight of the chain 500 increases. there were.

  The present invention solves the problems of the prior art as described above, that is, the object of the present invention is to prevent the outer link plate from warping outward and to increase the occupied space, And it is providing the chain where the breaking strength did not fall and the weight was reduced.

  According to the first aspect of the present invention, a pair of left and right inner link plates, a cylindrical bush whose both ends are press-fitted to the inner link plate, and a pair of left and right outer links disposed on both outer sides of the inner link plate are provided. It is composed of a link plate and a connecting pin that is rotatably inserted into the bush and has both ends press-fitted to the outer link plate, and the inner link plate and the outer link plate are alternately connected in large numbers. In the chain, the outer link plate has ribs protruding at positions that do not interfere with the inner link plate at the upper and lower ends of the chain running direction central portion of the side surface that is in sliding contact with the inner link plate, It solves the problem.

  In the invention according to claim 2, in addition to the structure of the chain described in claim 1, the outer link plate includes chamfered portions at upper and lower ends on the opposite side of the surface on which the rib is formed. This further solves the above problem.

  In the invention according to claim 3, in addition to the structure of the chain described in claim 1 or claim 2, the outer link plate includes a lightening hole between the upper and lower end ribs. The above-mentioned problem is further solved.

  The chain according to the first aspect of the present invention includes a pair of left and right inner link plates, a cylindrical bush press-fitted to both ends of the inner link plate, and a pair of left and right outer links disposed on both outer sides of the inner link plate. In a chain composed of a link plate and a connecting pin that is rotatably inserted into a bush and has both end portions press-fitted to the outer link plate, and a plurality of inner link plates and outer link plates are alternately connected, When the tension is applied to the chain, the outer link plate has ribs that protrude from the upper and lower ends of the chain running direction center on the side that is in sliding contact with the inner link plate and does not interfere with the inner link plate. The outer link plate is reinforced with ribs at the center in the chain running direction where the force that deflects the outer link plate outwards by bending the connecting pin Since there are no protrusions on the outside of the rate, the outer link plate is prevented from warping outward, the space occupied by the chain does not increase, and the weight increases slightly. Can be provided.

  In the chain according to the second aspect of the invention, in addition to the effect of the chain according to the first aspect, the outer link plate has chamfered portions at the upper and lower ends on the opposite side of the surface on which the rib is formed. As a result, the weight of the outer link plate can be reduced while the breaking strength is ensured by the ribs, so that a chain with a slight increase in weight can be provided.

  And in addition to the effect which the chain concerning Claim 1 or Claim 2 has in the chain of the invention concerning Claim 3, the outer link plate is provided with a lightening hole between the upper and lower end ribs. Thus, since the breaking strength is ensured by the rib and the weight more than the increase in weight by the rib can be reduced, a further lighter chain can be provided.

  The chain of the present invention includes a pair of left and right inner link plates, a cylindrical bush having both ends press-fitted to the inner link plate, a pair of left and right outer link plates disposed on both outer sides of the inner link plate, and a bush. In a chain in which both end portions are press-fitted into the outer link plate and are inserted into the outer link plate, and a plurality of inner link plates and outer link plates are alternately connected. It has ribs that protrude from the upper and lower ends of the side of the chain running direction on the side that is in sliding contact with the inner link plate and does not interfere with the inner link plate, preventing the outer link plate from warping outward and occupying it. As long as the space is not increased, and the effect of reducing the weight without reducing the breaking strength is obtained, the specific embodiment thereof is not limited. It does not matter any even.

Below, the chain of this invention is demonstrated based on drawing.
FIG. 1 is a perspective view of a chain according to an embodiment of the present invention, FIG. 2 is a perspective view of an outer link plate of the chain according to an embodiment of the present invention, and FIG. FIG. 4 is a front view of an outer link plate of a chain as an embodiment, FIG. 4 is a plan view of the outer link plate of a chain as an embodiment of the present invention, and FIG. 5 is an embodiment of the present invention. It is a side view of the outer link plate of a chain.

As shown in FIG. 1, a chain 100 according to an embodiment of the present invention includes a pair of left and right inner link plates 120 and a cylindrical bush 140 having both ends press-fitted into the bush holes 121 of the inner link plate 120. And a pair of left and right outer link plates 110 arranged on both outer sides of the inner link plate 120, and a connecting pin that is rotatably inserted into the bushing 140 and has both ends press-fitted into the pin holes 114 of the outer link plate 110. 130, the outer link 101 in which the connecting pin 130 is fitted and fixed in the pin hole 114 of the pair of outer link plates 110, and the bush 140 in the bush hole 121 of the pair of inner link plates 120. A plurality of links 102 are alternately connected by loosely inserting connecting pins 130 into the bush 140.
In this embodiment, a roller 150 is loosely fitted to the bush 140.

  As shown in FIGS. 2 to 5, the outer link plate 110 protrudes the rib 111 at a position where it does not interfere with the inner link plate 120 at the upper and lower ends of the central portion in the chain running direction on the side surface in sliding contact with the inner link plate 120. Is provided.

Further, chamfered portions 112 are provided on the upper and lower ends of the outer link plate 110 opposite to the surface on which the ribs 111 are formed.
Further, a lightening hole 113 is provided between the upper and lower end ribs 111 of the outer link plate 110.

The operation of the chain 100 having the outer link plate 110 configured as described above will be described.
When the chain 100 is driven, the tensile force applied to the chain 100 is such that the pin holes 121 of the outer link plate 110 and the bush holes 121 of the inner link plate 120 are pulled left and right through the bushes 140 and the connecting pins 130. Works.

  At this time, the connecting pin 130 receives a force in the direction of bending, and the outer link plate 110 also receives a force in a direction of warping outward. However, since the rib 111 is provided on the outer link plate 110, the warping direction is increased. When the thickness of the outer link plate 110 is increased and the strength is increased, the outer link plate 110 is prevented from warping outward.

  Since the rib 111 is provided at a position where the side surface in sliding contact with the inner link plate 120 does not interfere, the space occupied by the chain 100 does not increase, and smooth even when the chain 100 is wound around a sprocket or the like. Bend to.

  Further, the tensile force applied to the chain 100 acts as a force in the breaking direction of the outer link plate 110 via the connecting pin 130, and this tensile force causes a break in a portion having a small cross-sectional area perpendicular to the tensile direction of the outer link plate 110. The fear of

  Since the rib 111 is provided in the central portion of the outer link plate 110 in the chain running direction and the cross-sectional area increases, the center of the pin hole 114 having the smallest cross-sectional area is provided even if the chamfered portion 112 and the cutout hole 113 are provided. Unless the cross-sectional area becomes smaller than the cross section perpendicular to the upper chain running direction, the breaking strength of the outer link plate 110 does not decrease, and the weight can be reduced.

  As described above, according to the present invention, the outer link plate is prevented from warping outward, the occupied space does not increase, the breaking strength does not decrease, and the weight is reduced. Is enormous.

In addition, although the chain 100 of a present Example is a roller chain which has the roller 150, it may be a bush chain which does not have a roller.
Further, the size and shape of the rib 111, the chamfered portion 112, and the lightening hole 113 are not limited to the embodiment, and may be any size and shape.

The perspective view of the chain which is one Example of this invention. The perspective view of the outer link plate of the chain which is one Example of this invention. The front view of the outer link plate of the chain which is one Example of this invention. The top view of the outer link plate of the chain which is one Example of this invention. The side view of the outer link plate of the chain which is one Example of this invention. The side view of the conventional chain. The partial cross-sectional top view of the conventional chain. The front view and side view of the outer link plate of the conventional chain.

Explanation of symbols

100, 500 ... Chain 110, 510 ... Outer link plate 111, 511 ... Rib 112 ... Chamfered portion 113 ... Meat removal hole 114 ... Pin hole 120, 520 ... Inner link Plate 121 ... Bush holes 130, 530 ... Connecting pins 140, 540 ... Bush 150, 550 ... Rollers

Claims (3)

A pair of left and right inner link plates, a cylindrical bush whose both ends are press-fitted to the inner link plate, a pair of left and right outer link plates arranged on both outer sides of the inner link plate, and the bush are rotatable. In the chain in which both end portions are constituted by connecting pins that are press-fitted to the outer link plate, and the inner link plate and the outer link plate are alternately connected in a large number,
The chain, wherein the outer link plate has ribs protruding at positions at the upper and lower ends of the side portion in the chain running direction of the side surface that is in sliding contact with the inner link plate and does not interfere with the inner link plate.   The chain according to claim 1, wherein the outer link plate includes chamfered portions at upper and lower ends on the opposite side of the surface on which the rib is formed.   The chain according to claim 1 or 2, wherein the outer link plate has a lightening hole between the upper and lower end ribs.

Images