CN2858470Y

CN2858470Y - Tension arm of motorcycle chain

Info

Publication number: CN2858470Y
Application number: CN 200520010441
Authority: CN
Inventors: 尹明善; 罗鹏
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2005-12-01
Filing date: 2005-12-01
Publication date: 2007-01-17
Anticipated expiration: 2015-12-01

Abstract

A tension arm of a motorcycle chain comprises a compressive rod arm (12), a chain wheel arm (11), and a tension arm axes hole (10) provided between the rod arm (12) and the chain wheel arm (11), and is characterised in that thickness of ends of the compressive rod arm (12) are thicker than the compressive rod arm (12) boby. The utility model increases contacting area of the ends of the compressive rod arm and a rubber head of a tension rid by increasing the thichness of the ends of the compressive rod arm, thereby reduce pressure applied on local of the surface of the tension rid rubber head, so as to prolong the life time of the tension rid rubber head on top of the tension rid.

Description

The motorcycle chain tensioner arm

One, technical field

The utility model relates to a kind of motorcycle part, in particular for a kind of tensioner arm of motorcycle chain device.

Two, background technology

The tensioner arm of motor bike employing at present, its effect is to compress the timing driving chain by tension wheel, makes the timing driving chain keep certain elasticity, guarantees that driving engine normally moves.The depression bar arm of tensioner arm is to act directly on the nutted rod Rubber end at nutted rod top, but because the termination thickness of the tensioner arm of motor bike employing at present is of uniform thickness with the depression bar arm body, and it is thinner, has only 2.5mm, this just causes the area of the termination of depression bar arm and nutted rod rubber head contact position less, the local suffered pressure of nutted rod Rubber end upper surface is big, forms groove easily or breaks ultimate failure.

Three, utility model content

The purpose of this utility model provides a kind of motorcycle chain tensioner arm, the tensioner arm upperpush rod arm termination that solves present motor bike employing is damaged easily because of thickness low LCL causes the nutted rod Rubber end at nutted rod top, thereby causes nutted rod Rubber end short problem in service life.

Concrete scheme of the present utility model: a kind of motorcycle chain tensioner arm, comprise depression bar arm and sprocket wheel arm, in the intersection of depression bar arm and sprocket wheel arm the tensioner arm axis hole is arranged, its main points are: the termination thickness specific pressure lever arm body of described depression bar arm is thick.

The optimum thickness of the arm of depression bar described in such scheme termination is the twice of depression bar arm body thickness.

The utility model has the advantages that: the service life that can prolong the nutted rod Rubber end at nutted rod top.

Four, description of drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is a birds-eye view of the present utility model.

Fig. 3 is running condition figure of the present utility model.

The meaning of each numbering is among the above-mentioned figure: 1 timing driving chain, 2 engine crankshaft casings, 3 tension wheels, 4 tensioning arm axles, 5 nutted rod Rubber ends, 6 nutted rods, 7 nutted rod springs, 8 nutted rods sealing plug screw, 9 timing drive sprockets, 10 tensioner arm axis holes, 11 sprocket wheel arms, 12 depression bar arms.

Five, the specific embodiment

As shown in Figure 1, the utility model comprises depression bar arm 12 and sprocket wheel arm 11, in the intersection of depression bar arm 12 and sprocket wheel arm 11 tensioner arm axis hole 10 is arranged, and in the termination of sprocket wheel arm 11 the sprocket wheel axis hole is arranged, and termination thickness specific pressure lever arm 12 bodies of described depression bar arm 12 are thick.

As shown in Figure 2, the termination thickness of described depression bar arm 12 is twices of depression bar arm 12 body thickness.

As shown in Figure 3, in engine crankshaft casing 2, nutted rod Rubber end 5 is installed on the nutted rod 6, the nutted rod spring 7 of nutted rod 6 belows is fixed with on the nutted rod sealing plug screw 8, under the elastic force effect of nutted rod spring 7, the termination of 5 pairs of depression bar arms 12 of nutted rod Rubber end applies a power, and tensioner arm is rotated around tensioning arm axle 4.The tension wheel 3 that is installed on the tensioner arm applies a tensile force just for timing driving chain 1, prevents when timing driving chain 1 from moving on timing drive sprocket 9 loose excessively.

Claims

1, a kind of motorcycle chain tensioner arm, comprise depression bar arm (12) and sprocket wheel arm (11), there is tensioner arm axis hole (10) in intersection at depression bar arm (12) and sprocket wheel arm (11), it is characterized in that: termination thickness specific pressure lever arm (12) body of described depression bar arm (12) is thick.

2, motorcycle chain tensioner arm according to claim 1 is characterized in that: the termination thickness of described depression bar arm (12) is the twice of depression bar arm (12) body thickness.