JPS6330829Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on the hydraulic brakes of automobiles.
This invention relates to a leaf spring device for positioning an adjuster star wheel incorporated in a wheel cylinder.

The adjuster star wheel attached to the wheel cylinder is engaged with a leaf spring whose base end is attached at an appropriate location by an appropriate means to prevent unnecessary rotation of the adjuster star wheel. Generally, leaf springs are attached to the wheel cylinder body using bolts, but this poses a problem in that it takes time and effort to install.

It is also known that a leaf spring having a U-shaped cross section is fitted into a brake shoe web fitting groove of an adjustment screw threaded onto the adjuster star piston. Because the leaf spring could be displaced up and down inside, there was a risk that the leaf spring would come off the adjuster wheel.

Furthermore, a spring plate is sandwiched between a pressure receiving piece having a semicircular cross section that is fitted into an arcuate groove provided at the end of the brake shoe web and the end face of the adjuster star piston, and the spring plate is fixed to the pressure receiving piece. However, there was a risk that the spring plate would move together with the pressure receiving piece against the brake show web, causing the pressure receiving piece to come off.

This invention aims to provide a leaf spring device that is easy and reliable to install and improves the wear resistance of the brake shoe contact surface.

An embodiment of this invention will be described based on the drawings.

1 is a wheel cylinder body, 2 is an adjuster star piston that is slidably fitted into the wheel cylinder body 1, 3 is an adjuster star wheel provided on the adjuster star piston 2, and 5 is an adjustment screw screwed into the adjuster star piston 2. A groove 9 for fitting the web 8 of the brake shoe 7 is provided in the head 6 in the diametrical direction. The above is a common known technique for each of the embodiments, and although it is specifically shown in FIG. 1, it is omitted from the other drawings. The leaf spring 10 is connected to the head 6 of the adjustment screw 5.
A locking piece 13 that engages with the adjuster star wheel 3 is provided at the tip of the arm piece 12 extending from the insertion part 11 that is inserted into the bottom of the shoe web fitting groove 9 provided in It is constructed by providing upper and lower bending clamp pieces 15 that engage with each other at the upper and lower sides.

In the first embodiment shown in FIGS. 1 to 3, the bendable clamping pieces 15 come out from the tip of the band-shaped insertion part 11, and the bending clamping pieces 15, 15 is out.

In the second embodiment shown in FIGS. 4 to 6, the head 6 is surrounded by a ring part 16 that is integrated with the insertion part 11, and in the first embodiment, the arm piece 12 is The bent clamp pieces 15, 15 protruding from both sides of the base protrude from the center of the arm piece 12 in this second embodiment.

In the third embodiment shown in FIGS. 7 to 10, the arm piece 1 in the second embodiment is
2 and the position of the bending clamp piece 15 are rotated 90 degrees.

The fourth embodiment shown in FIGS. 11 to 13 has a bendable clamping piece 1 in the second embodiment.
5 and 15 are provided on both sides of the ring portion 16.

The fifth embodiment shown in FIGS. 14 to 18 differs from the first embodiment in that the diameter of the neck 17 of the adjusting screw 5 is reduced, and bent clamping pieces protrude from both sides of the base of the arm piece 12. Extend 15, 15 and neck 17
A circular arc notch 18 is provided to sandwich the band-shaped insertion portion 11.
A bent piece 19 is provided at the tip to prevent it from coming off.

In the invention described above, the leaf spring is held in the head part 6 of the adjusting screw 5, so that the leaf spring can be easily attached. Furthermore, the brake shoe can be easily installed without the leaf spring coming off during the shoe web fitting operation. Furthermore, since leaf springs are generally harder and more resistant to wear than gear star pistons, the wear resistance of the brake shoe contact surface can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of a leaf spring device for an adjuster star wheel of a wheel cylinder according to this invention. Figures 1 to 3 are
FIG. 1 is a front view, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a right side view of FIG. 1. Figures 4 to 6 show the second embodiment, with Figure 4 being a front view, Figure 5 being a left side view of Figure 4, and Figure 6 being a right side view of Figure 4. . Figures 7 to 10 show the third embodiment.
8 is a right side view of FIG. 7, FIG. 9 is a left side view of FIG. 7, and FIG. 10 is a plan view of FIG. 7. Figures 11 to 13 show the fourth embodiment, with Figure 11 being a front view and Figure 12 being a front view of the first embodiment.
FIG. 13 is a left side view of FIG. 11, and FIG. 13 is a right side view of FIG. 14 to 18 show the fifth embodiment, FIG. 14 is a front view, FIG. 15 is a left side view of FIG. 14, FIG. 16 is a front view of the leaf spring, and FIG. 17 is a front view of the leaf spring. FIG. 16 is a left side view, and FIG. 18 is a right side view of FIG. 16. 3... Adjustment star wheel, 5... Adjustment screw, 6... Head, 9... Groove, 10... Leaf spring, 11... Insertion part, 12... Arm piece, 13...
...Locking piece, 14...Neck side end surface, 15...Bending clamp piece.

Claims (1)

[Scope of utility model registration request] A locking piece that engages with the adjuster star wheel is provided at the tip of the arm piece that extends from the insertion part that is inserted into the bottom of the shew web fitting groove provided on the head of the adjustment screw, and a locking piece that engages with the adjuster star wheel is provided above and below the neck side end surface of the head. A leaf spring device for an adjuster star wheel of a wheel cylinder, which is provided with upper and lower bending clamp pieces that engage with each other.