Damping rocking arm behind the motor bike
Technical field:
The utility model relates to a kind of motorcycle accessories, specifically is damping rocking arm behind the motor bike.
Background technology:
The damping rocking arm is the vitals that connects motorcycle bottom fork and central bumper behind the motor bike, if there is not rocking arm, central bumper is just inoperative.At present, the back damping rocking arm that people use is made of the iron casting butt joint of two " U " shapes, and an end of rocking arm connects vehicle frame, and the other end connects chain stay and bumper.Since complex structure, heaviness, therefore rotation is dumb in the work, and it is also easy to wear that each installs endoporus.
Content of the present utility model:
The purpose of this utility model provide a kind of in light weight, rotate flexibly damping rocking arm behind the motor bike.
In order to achieve the above object, concrete scheme of the present utility model is: damping rocking arm behind a kind of motor bike, and its structural feature is: rocker body is triangular in shape, and all there is circular hole at leg-of-mutton three angles, and bearing is housed in circular hole; Three sides of a triangle are the arc limit, have at least one side to have groove on the plane, leg-of-mutton front and back.
The utility model adopts triangular structure, and to change iron casting be aluminium alloy castings, simplifies the structure greatly, has alleviated weight.Three angles in the triangle rocker body are provided with circular hole, and bearing is installed in circular hole, and this can not only connect chain stay, central bumper and vehicle frame effectively, and helps to reduce the work friction force, make to rotate flexibly.
The utility model is designed to the arc limit with three limits of triangle rocker body, helps expendable weight, gains in strength; Plane, front and back recessing in the triangle rocker body can further improve intensity, expendable weight.Save material simultaneously, reduced cost.
The beneficial effects of the utility model are: novel structure, simple, in light weight, to rotate flexibly, and intensity is good, but cost-cutting.
Description of drawings:
Fig. 1 is a front view of the present utility model;
Fig. 2 is the back view of Fig. 1;
Fig. 3 is the A-A cutaway view of Fig. 1.
The specific embodiment:
Please see Figure 1, Fig. 2, Fig. 3, meaning of each numbering is among the figure: rocker body 1, circular hole 2, bearing 3, groove 4.The damping rocking arm is that rocker body 1 is triangular in shape behind the motor bike described in the utility model, and all there is circular hole 2 at leg-of-mutton three angles, and bearing 3 is housed in circular hole 2; Three sides of a triangle are the arc limit, have at least one side to have groove 4 on the plane, leg-of-mutton front and back.
Can further see from Fig. 1, Fig. 2: two horizontal frontal planes of described triangle rocker body 1 all have two grooves 4.
The installation situation of the utility model on motor bike is: the top circular hole of triangle rocker body 1 links to each other with chain stay by connecting rod rack, and one of triangle base two circular hole connect to ground, and another installs central bumper.Motor bike under steam because triangle rocker body 1 rotates flexibly with vehicle frame, chain stay, central bumper junction, therefore, central bumper can be under the chain stay effect normal operation.