JPS6218750Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement of a U-shaped show-to-show spring for a drum brake.

[Problems to be solved by conventional techniques and ideas]

Conventionally, a drum brake using a U-shaped shoe-to-sew spring has a notch in each of the holding plate of the leading brake shoe and the holding plate of the trailing brake shoe, and an anchor bent at right angles from the main body is attached to the cutout. The anchor portion of the U-shaped spring having a portion is engaged with the U-shaped spring, and the position of the U-shaped spring is determined by a fastener on the retaining plate, but the work is complicated, and the number of parts increases, resulting in high cost. There were some drawbacks such as:

[Means for solving problems]

The present invention has been devised to eliminate such drawbacks, and the holding plate 2a of the leading brake shoe 2 and the holding plate 3a of the trailing brake shoe 3 are provided with notches 2b and 3b, respectively, and the spring body is separated from the spring body. A U-shaped show-to-show spring 6 having an anchor portion 6a bent at a predetermined angle θ that can be engaged with the notches 2b, 3b is provided, and the anchor portion 6a of the spring 6 is connected to the notch portions 2b, 3b. In the drum brakes that are engaged with each other, the angle between the anchor portion 6a of the U-shaped show-to-show spring 6 and the main body is set to an acute angle smaller than the predetermined angle θ, and the angle is forced to the predetermined angle θ. The gist of this is a U-shaped show-to-show spring for a drum brake, which is applied in an expanded manner and is pressed against and held by the anchor 5 only by the elasticity of the spring 6.

〔Example〕

Figure 1 shows a front view of a drum brake using the U-shaped show-to-show spring of the present invention.
A U-shaped show-to-show spring 6 is interposed between the holding plate 2a of the leading brake shoe 2 and the holding plate 3a of the trailing brake shoe 3, and the wheel cylinder 1 is actuated to perform braking and release. It's starting to repeat.

In FIG. 2, the angle θ between the main body of the U-shaped show-to-show spring 6 and the anchor portion 6a is made to be an acute angle when the U-shaped spring 6 is in its free state. The notch portions 2b are provided in the holding plate 2a of the leading brake shoe 2 and the holding plate 3a of the trailing brake shoe 3, respectively, with the anchor portion 6a expanded to a right angle against the elasticity of the acute angle portion. , 3b, the U-shaped spring 6 is pressed against the anchor 5 only by its own spring force, and stable positioning can be achieved.

[Effect of idea]

As described above, the show-to-show spring of the present invention has its anchor portions 6a, 6a connected to the show 2, 3.
The installation is completed by simply inserting it into the notches 2b and 3b of the anchor 5, and it is held against the anchor 5 only by the elasticity of the spring 6, so the desired purpose can be achieved with an extremely simple structure, which was not necessary in the past. It is possible to provide an industrially advantageous U-shaped show-to-show spring that eliminates the need for fasteners, reduces the number of parts, reduces costs, and improves work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a front view of a drum brake equipped with a U-shaped push-button spring of the present invention;
The figure shows a cross-sectional view of FIG. 1 taken along the line A-A. 1: Wheel cylinder, 2: Leading brake shoe, 3: Trailing brake shoe, 4: Drum, 5: Anchor, 6: U
Shaped like a see-through spring.

Claims (1)

[Scope of utility model registration request] Notches 2b and 3b are provided in the holding plate 2a of the leading brake shoe 2 and the holding plate 3a of the trailing brake shoe 3, respectively, and the spring body is formed at a predetermined angle θ that can engage the notches 2b and 3b. U having a bent anchor part 6a
The anchor portion 6a of the spring 6 is connected to the cutout portion 2b.
3b, the U-shaped show-to-show spring 6
The angle between the anchor portion 6a and the main body is set to an acute angle smaller than the predetermined angle θ, and this is forcibly expanded to the predetermined angle θ, and is pressed against the anchor 5 only by the elasticity of the spring 6. The drum brake's U-shaped show-to-show spring is unique in that it is held in place.