JPS6361531B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in pin type disc brakes.

In recent years, the slide pin type, which is known as a floating support (sliding support) structure for the caliper in disc brakes, has become widely used due to its relatively simple structure. This trend is also progressing for use in large vehicles that require a brake device.

By the way, one of the important issues with such disc brakes is to effectively prevent caliper slippage and thereby prevent dragging when the brake is not on. Types that cover boots made of rubber or the like are better than those that are exposed to water and are not protected against rust. However, the type using rubber boots like this also has heat,
Alternatively, problems such as deterioration and damage may occur due to the effects of ozone, etc., and measures to prevent rusting may not necessarily be sufficient. This is especially a problem if the situation is easy.

Therefore, in the present invention, unlike the viewpoint of covering and protecting the sliding parts, when rusting of the sliding surfaces due to rusting or other sliding defects occurs, the auxiliary sliding parts are used to protect the sliding parts. It is an object of the present invention to provide a pin type disc brake equipped with a sliding support structure configured to ensure sliding of the caliper.
Specifically, both ends of the slide pin are fixedly assembled to one of the caliper or the support, and the central part of the shaft is slidably assembled to the other opening of the caliper or the support, thereby forming a sliding support part. In the pin-type disc brake, the slide pin slides into the opening via an exterior rigid sleeve, and a spring is provided between the fixed end of the slide pin and the rigid sleeve to apply a spring force at least in the brake release direction. A pin type disc brake characterized in that the rigid sleeve and the opening have a sliding resistance that is smaller than that of the rigid sleeve and the slide pin. It's the brakes.

The present invention will be explained below based on the best embodiment shown in the drawings.

Although the figure shows the right half of the disc brake, it is obvious that another sliding support structure is provided on the left and right sides of the same shape.

In the figure, 1 is a support extending from the solid fixed part, and in this example, this support 1 is provided so as to cross the radially outer position of the disk (not shown) and reach from one side of the disk to the other side. By this,
It is provided so as to support a pair of friction pads 2 and 3 which are arranged oppositely on both sides of the disk. Reference numeral 4 denotes an opening formed at the tip of the arm portion of the support 1 and extending in the disk axial direction, into which fixing plugs 5 and 6 are fitted.

Reference numeral 7 denotes a caliper having a built-in pad pressing mechanism on one side of the disk, and the other side of the disk forms a reaction part. As shown in the figure, this caliper 7 is integrated with a slide pin 8 whose both ends are fixedly assembled. 6 is slidably assembled. The slide pin 8 and the rigid sleeve 9 are also provided to be slidable, but normally the space between the rigid sleeve 9 and the caliper 7 is balanced by installing disc springs 10 and 11 that apply spring force in the axial direction. The sliding resistance between the rigid sleeve 9 and the slide pin 8 is reduced by the presence of the disk springs 10 and 11, which prevents relative sliding between the rigid sleeve 9 and the fixed plugs 5 and 6. It is set to be greater than the sliding resistance.

Note that 12 to 15 are all seals.

Next, to explain its operation, when one of the friction pads 2 is pressed against the disc by the pad pressing mechanism built in the caliper 7 during braking, the caliper 7 slides in the axial direction of the disc due to the reaction force, and the reaction part The other friction pad 3 is pressed against the disc and these produce a braking force.
At this time, the caliper 7 slides between the outer rigid sleeve 9 and the fixed plugs 5 and 6, which have less sliding resistance, as described above.

However, if the resistance of this outer sliding surface becomes large due to rust, etc., the rigid sleeve 9
slides not against the fixed plugs 5 and 6 but against the slide pin while compressing the spring 11, and when the brake is released, it can return by the amount of compression of the spring. This sliding of the rigid sleeve 9 on the slide pin 8 is not normally performed, and only needs to be performed when a sliding failure occurs on the outer sliding surface, so the sliding length is extremely short. As is clear from the illustrated configuration, the shaft portion of the slide pin 8 can be configured to be covered over substantially the entire length by the rigid sleeve 9.

Therefore, in addition to constructing the rigid sleeve etc. using non-rusting metal, the risk of rusting is greatly reduced by applying anti-rust oil such as grease to the disc spring assembly part. be able to.

In this example, the springs are arranged on both sides of the rigid sleeve 9, but it will be understood that only one spring is needed to return the caliper 7 when the brake is released.

According to the sliding support structure configured as described above, the following effects can be obtained.

B. Even if the sliding resistance between the support and the rigid sleeve becomes large, the friction pad will not drag.

(b) Compared to anti-corrosion measures that cover the slide pin with rubber, there are no problems caused by the effects of heat, etc.

C. Spring force acts on the rigid sleeve, so there is no wobbling due to damping.

D. The friction pad can be replaced by removing only one slide pin without removing one sliding support mechanism.

As described above, the pin type disc brake according to the present invention can obtain various excellent effects with a relatively simple structure, and its usefulness is extremely great.

[Brief explanation of drawings]

The drawing is a partial plan view including a partial cross section of a pin type disc brake according to the present invention. 1... Support, 2, 3... Friction pad, 4... Opening, 5, 6... Fixed plug, 7... Caliper, 8... Slide pin, 9... Rigid sleeve, 10, 11... Belleville spring, 12, 13, 14, 15 …sticker.

Claims (1)

[Scope of Claims] 1. Both ends of the slide pin are fixedly assembled to one of the caliper or the support, and the central part of the shaft is slidably assembled to the other opening of the caliper or the support, thereby forming a sliding support part. In the pin type disc brake, the slide pin is slidably fitted into the opening via an exterior rigid sleeve, and a spring force is applied at least in the brake release direction between the slide pin fixed end and the rigid sleeve. A pin-type disc brake that features a spring that provides pressure. 2. The pin type disc brake according to claim 1, wherein the sliding resistance between the rigid sleeve and the opening is set to be smaller than the sliding resistance between the rigid sleeve and the slide pin.