JPH0213178B2 - - Google Patents

Description

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

Generally, in a pin type disc brake, the caliper, which is arranged to straddle the rotor edge, is connected to a guide pin and a fixed part of the vehicle body (hereinafter referred to as "support") such as a support fixed near the edge of the rotor. It is of the type supported by a sliding support device that has openings assembled in a sliding relationship, and has recently come into wide use as it is suitable for being relatively lightweight.

By the way, the desirable configuration of such pin type disc brakes varies from those suitable for relatively small motorcycles to large vehicles such as trucks, and the present invention is a comparative example of these brakes. The aim is to provide something suitable for large-sized vehicles.

In other words, in disc brakes used for large vehicles, the friction pads have a large area because they require a large braking force, and therefore the calipers used to press the friction pads against the rotor have to be correspondingly large. is normal. For this reason,
A sliding support device for reliably guiding such a large caliper in the axial direction of the rotor also desirably has a sliding surface extending over a fairly long range in the axial direction of the rotor in order to provide stable guidance.

For example, this is a disc brake of a type known for ordinary passenger cars, in which guide pins are fixedly extended in two positions spaced apart in the circumferential direction of the rotor in a direction away from the rotor from a support placed on one side of the rotor. It is understood that with a structure in which the caliper is slidably supported via this guide pin, the rules for rotation of the caliper around the rotor circumferential direction become a problem as the caliper becomes larger. It is something that In order to sufficiently restrict the rotation of the caliper with the same type, it is necessary to make the guide pin of the sliding support device considerably thicker, which leads to an increase in weight.

Therefore, in the present invention, in a relatively large disc brake, the inner side, which is a heavy part that houses the pad pressing mechanism of the caliper, is supported by a pair of sliding support devices spaced apart in the circumferential direction of the rotor, and the outer side is supported by a pair of sliding support devices spaced apart in the circumferential direction of the rotor. As for the side, a pin type disc brake is constructed which is supported by a sliding support device at one location to regulate the rotation of the caliper as described above,
Moreover, in order to ensure stable and reliable sliding guidance of the caliper by these three sliding support devices,
A pin type disc brake with two (or one) of these points slidingly connected via a rubber sleeve, and the other one (or two) being a sliding connection (metal sliding) without a rubber sleeve. was developed.

According to such a pin type disc brake, since the rigid bodies can be slid together at at least one of the three sliding support parts, the guiding direction can be reliably obtained, and the other one or two sliding support parts can be slid together. Sliding through the rubber sleeves at these locations provides the effect of absorbing deviations in machining tolerances of each component and preventing vibrations of the caliper using the rubber sleeves.

The present invention will be described below based on embodiments shown in the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a support provided with arms 2, 2 that straddle the edge of a rotor (not shown) at two positions spaced apart in the circumferential direction of the rotor. , in the middle of 2,
A pair of friction pads 3 facing each other with the rotor in between
(see Fig. 2) is supported so as to be movable in the rotor axial direction. And a pair of arms 2 of this support 1,
2, the guide pins are fixed as follows. That is, one arm 2 (left side in Figure 1) has a bolt hole 4 opened on the inner side of the rotor.
A bolt 5 is screwed into the bolt hole 4, and a sleeve-shaped guide pin 6 is tightened and fixed.

Further, the other arm 2 (right side in Fig. 1) is provided with a bolt hole 7 that penetrates in the rotor axial direction, and a bolt 8 that is longer than the inner side is screwed into this bolt hole 7 and fixed to the inner side. A sleeve-shaped guide pin 9 is tightened and fixed, and a bolt 8 is provided on the outer side so that its small diameter tip protrudes from the bolt hole 7 to form a guide pin 10 on the outer side.

Reference numeral 11 denotes a caliper disposed so as to straddle the edge of the rotor, the inner leg 12 houses a pad pressing mechanism (not shown), and the outer leg 13 serves as a reaction part. The caliper 11 is provided with arms 14 and 15 protruding from both sides in the rotor circumferential direction on the inner side, and an arm 16 protruding on one side in the rotor circumferential direction (in the direction of the guide pin 10) on the outer side. are provided, and boss holes 17, 18, and 19 are formed in these arms, respectively.

Then, these boss holes are connected to guide pins 6 and 9, respectively.
and 10, the caliper 11
In this example, two of these locations (guide pins 9 and 10) are provided in a sliding relationship via rubber sleeves 20 and 21. The other part (guide pin 6) has a rigid sliding relationship without using a rubber sleeve.

Note that 22, 23, and 24 are boots that seal the sliding surfaces from the outside, respectively.
4 is provided integrally with the rubber sleeves 20, 21.

In a pin type disc brake having a sliding support device configured as described above, the caliper 11 is slidably supported at two points on the inner side and one point on the outer side, and the guide pin 6 part has a rigid sliding support. This ensures that the caliper 11 is guided in the same direction as the other two guide pins 9 and 10.
The sliding fit through the rubber sleeves 20 and 21 can absorb slight deviations such as the pitch error of the guide pins 6 and 8 and the pitch error of the boss holes 17 and 18, as well as dampen the vibration of the caliper 11. It also has the effect of being able to effectively prevent it.
Of course, the guide pins 6 and 9 may be provided with a radial clearance at the fitting portions with the bolts 5 and 8.

According to such a configuration, even in the case of a relatively large caliper 11, the problem of rotation of the caliper 11 around the rotor circumferential direction hardly occurs, and stable support and sliding guidance are ensured. That will happen.

Also, when replacing the friction pad, by removing the bolt 5, the caliper 11 can be moved to the guide pins 9, 10.
This can be done extremely easily by rotating around the , and there is no need to consider the sealing mechanism on the outer side. Note that the rotation direction of the rotor may be either right or left in the case of FIG.

FIG. 3 shows another embodiment, in which a rubber sleeve 20' is arranged at the guide pin 6 part and no rubber sleeve is arranged at the guide pin 9 part. 1 are the same as those in FIG. 1, so the same reference numerals are given and the explanation thereof is omitted.

Similarly, it may be possible to make a sliding connection only at the guide pin 10 without using a rubber sleeve.

It goes without saying that even with such a configuration, the aforementioned effects can be obtained.

FIGS. 4 and 5 show the case where the guide pins (bolts or sleeves) for fixing the supports for configuring the sliding support portions at three locations are provided as separate pieces without being shared. Moreover, these examples are different from those shown in FIGS. 1 to 3 in that two of the sliding support devices are metal sliding fittings, and the other one is sliding fitting through rubber.

That is, in the example shown in FIG. 4, the sleeve-shaped guide pin 6 fixed by the bolt 5 is slidably fitted into the boss hole 17 via the rubber sleeve 20'.
Sleeve-shaped guide pins 9 and 9' fixed via bolts 8 and 8' are respectively inserted into boss holes 1.
8 and 19 are metal sliding mated. Note that the other configurations are substantially the same as those shown in FIG.

In addition, in the example shown in FIG. 5, the boss hole 19 and the guide pin 9' are provided on the outer side of the sliding support section that has the guide pin 6 on the side through the rubber sleeve 20'.
A sliding support mechanism consisting of bolt 8 is provided, and the others are the fourth
It has the same configuration as shown in the figure.

In the case of the examples shown in Figures 4 and 5 as well, by supporting the large disc brake at three points, the caliper can be supported stably and the sliding direction can be ensured, and the effect is extremely large. be.

As described above, the pin type disc brake according to the present invention can achieve stable support and reliable guidance of the caliper while simplifying the structure and reducing weight as much as possible as a relatively large disc brake. Sex is a big thing.

[Brief explanation of drawings]

FIG. 1 is a plan view including a partial cross section of a pin type disc brake showing one embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a plan view including a partial cross section showing another embodiment of the invention. 4 and 5 are plan views including partial cross sections showing other embodiments of the present invention, respectively. 1...Support, 2...Arm, 3...Friction pad, 4...Bolt hole, 5...Bolt, 6...Guide pin, 7...Through bolt hole, 8, 8'...Bolt, 9, 9', 10... Guide pin, 11... Caliper, 12, 13... Leg, 14, 15, 16
... Arm, 17, 18, 19 ... Bolt hole, 20,
20', 21...Rubber sleeve, 22, 23, 2
4...Boots.

Claims (1)

[Scope of Claims] 1: a vehicle body fixing part disposed near the rotor edge; a caliper having a pad pressing mechanism on the inner side of the rotor across the rotor edge; and a caliper having a reaction part on the outer side; The caliper includes a pair of friction pads that are pressed against the rotor, and a guide pin that is fixed to the vehicle body fixing part at a lateral position of the caliper in the circumferential direction of the rotor, and a boss hole of an arm that extends to the side of the caliper. A pin type disc brake comprising a sliding support device that supports the caliper movably in the axial direction of the rotor by slidingly fitting the guide pin directly or through a rubber sleeve, wherein the sliding support device is mounted on the inner side of the rotor. In this case, they are provided on both sides of the caliper in the circumferential direction of the rotor, and on the outer side, they are provided only on one side of the caliper in the circumferential direction of the rotor, and any two of these three sliding support devices have a boss hole that slides onto the guide pin through a rubber sleeve. The other one is a pin type disc brake characterized by a boss hole that is fitted with a metal guide pin. 2. A vehicle body fixing part disposed near the edge of the rotor, a caliper that straddles the edge of the rotor and has a pad pressing mechanism on the inner side of the rotor and a reaction part on the outer side, and a caliper that is clamped to the rotor by this caliper. It includes a pair of friction pads to be pressed and a guide pin fixed to the vehicle body fixing part at a lateral position in the rotor circumferential direction of the caliper, and the guide pin is directly or A pin type disc brake includes a sliding support device that supports the caliper so as to be movable in the axial direction of the rotor by slidingly fitting the caliper through a rubber sleeve. They are provided on both sides, and on the outer side, they are provided only on one side of the caliper in the circumferential direction of the rotor. Two of these three sliding support devices have a boss hole that slides into the guide pin, and the other one has a boss hole. A pin-type disc brake characterized by slidingly fitting onto a guide pin via a rubber sleeve.