JPH0215733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention separates the brake shoe body and the lining part, makes the lining part a pad type, and forms the left and right brake shoe bodies only with a web, and the outer periphery of the web. This invention relates to a cylinder-integrated support member in which a support part for supporting the left and right webs and a cylinder part for expanding the webs are integrally cast in a pad-type drum brake in which friction pads are detachably attached.

In pad-type drum brakes, the brake shoe body does not have a rim and only has a web, so a support member is required to support this web. Conventionally, the support member, cylinder, anchor block, etc. were assembled to the backing plate and integrated. In addition, in some cases reinforcing members were attached to improve rigidity, which increased the number of parts and assembly man-hours, resulting in higher costs, and the bucking plate as a strength member had a large burden on the weight of the brake. There were some shortcomings.

The present invention was made to eliminate these drawbacks, and by making the support part, cylinder part, and anchor part into an integral structure, the bucking plate is not required, the weight is reduced, and the desired results have been achieved. It is something. The present invention will be explained below with reference to the drawings.

FIGS. 1a, b, and c respectively show a plan view, a front view, and a sectional view taken along the line AA of the cylinder-integrated support member 1 of the present invention, and FIG. 2 is a front view showing the state of use.

The cylinder integrated support member 1 is made of an integrally cast product, and includes a cylinder 2 for hydraulic operation installed horizontally in the center of the main body for spreading and braking the left and right webs 10, 10, and a cylinder 2 for hydraulic operation installed horizontally in the center of the main body for braking by expanding the left and right webs 10, 10. First web support surfaces 4, 4 each have a curved vertical surface facing outward, and a first web support surface 4, 4 having a small area parallel to the drum rotation surface, and a first web support surface 4, 4 extending diagonally downward to the left and right from the rear portion 2' of the cylinder 2. A cylinder consisting of a small-area second web support surface 5, 5 that rises up to the same plane as the upper first web support surface 4, 4 at the extended detail of the ivy-pronged bulging plate-like portion 1'. Integral support member 1
It is. Note that the first and second web support surfaces 4, 4,
5 and 5 are located on the same plane and substantially on the same plane as the center of the cylinder 2, and are adapted to abut the web pressing portion 14 at the center of the piston 13 of the cylinder 2.

Fig. 2 shows the web in use, 10, 10 are the left and right webs, 11 is a friction pad appropriately arranged and attached to the outer circumference of the web, 12, 12 is the left and right web 10,
10 is a fitting for holding and engaging the cylinder-integrated support member 1; 13 is a piston; 14 is a web pressing part for operating the piston 13 to spread the web 10; 15 is a restoring part for restoring the spread web. Return spring 16 is the friction pad 1 for
1 and an adjuster 17 for adjusting the gap between the web 10 and the drum (not shown);
It is a spring that applies pressure to the

As described above, the cylinder integrated support member of the present invention has the cylinder part, the support part, and the anchor part integrally formed, so it has advantages such as improved rigidity, reduced weight, reduced number of parts and assembly man-hours, and cost reduction. be.

[Brief explanation of drawings]

Figures 1a, b, and c are a plan view, a front view, a sectional view taken along line A-A, and a second
The figures each show a front view showing the state of use. 1... Cylinder integral support member, 2... Cylinder, 3... Anchor portion, 4, 5... Web support surface.

Claims (1)

[Claims] 1. In a pad-type drum brake that is formed only from left and right brake shoe bodies and webs, and in which friction pads are removably attached to the outer periphery of the webs, a pad-type drum brake is made of an integrally cast product and is used to spread the left and right webs for braking. A hydraulic cylinder, a pair of first web support surfaces parallel to the drum rotation surface at both ends of the cylinder, and two pronged bulging plate-shaped extension ends extending obliquely from both ends of the cylinder. A cylinder-integrated support member for a pad-type drum brake, characterized in that the support member comprises a pair of second web support surfaces rising up to be flush with the pair of first web support surfaces.