JPS58163833A - Disc brake - Google Patents

Abstract

PURPOSE:To reduce the diameter of a common pad support shaft corresponding to a conventional main pin by providing a disc brake where a couple of forces produced in a friction pad at the time of braking act in such a manner as to reduce reaction force working upon the common pad support shaft at the time of braking. CONSTITUTION:A caliper 6 is slidably guided and retained along the axis of the disc 1 through a common pad support shaft 4 and the first support shaft 5. The first friction pad 9 and the second friction pad 10 are guided and retained in the same manner through the common pad support shaft 4 and the first pad support shaft 5, and through the common pad support shaft 4 and the second support shaft 8, respectively. A retarding torque E acts upon the common pad support shaft 4 through both friction pads 9, 10. A couple of forces (f) work upon the support shaft 4 and the first and second pad support shafts 5, 8. A resultant force of these forces is smaller than the retarding torque F, as confirmed in graphical solution of force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc brake system (some disc brakes include a carrier fixed to one of the discs on a non-rotating member of the vehicle, and a disc brake that straddles the outer part of the disc and is freely displaceable in the axial direction of the disc. It is equipped with a middle caliper held in a carrier and 91 pairs of friction pads arranged to sandwich the disc, and when one of the pair of friction pads is pressed against one surface of the disc by the suppression mechanism equipped on the caliper, this reaction force is generated. It is possible to use the displacement of the caliper itself caused by this to force the other friction pad against the other surface of the disk to perform a braking action.

In this type of disc brake, it is necessary to hold the friction pad so that it does not fall off and is movable in the axial direction of the disc. For this reason, conventionally the 18th
As shown in the figure, attach each disc to the carrier.
A pair of pad support shafts extend in the axial direction of the disk and are spaced apart from each other in the circumferential direction of the disk.
, 2' are provided, and a pair of pad support shafts r.

τ held a pair of friction pads 3'. This pair of pad support shafts r and z are located on the front side (a
The torque F generated during braking is located on the left 77 side of the lt8 diagram.
Main bin r receives the main bin r, and rear II in the disk rotation direction
It consists of a sub-bin 2 located at (viewing position @) in Fig. 18.

In the disc brake described above, a force couple f acts on the friction pad 3' during braking, but the i1T condition i
- In a friction pad holding structure such as that shown in FIG. 7 for r, which is thicker than the pressure F. As a result of the 1 resultant force, that is, the resultant force X of the reaction force F and the couple V, the main bin r has to be made with a large diameter. Accordingly, the attachment part of the carrier to the main bin fK has to be made very strong, which causes the disc brake to become heavier and larger.

In addition, in the conventional friction pad holding structure, the carrier must have a shape that extends considerably in the circumferential direction of the disc, which makes the disc brake even heavier and larger. It had become. In other words, since the carrier is attached to a non-rotating member of the vehicle, it generally has a portion that extends substantially in the radial direction of the disk, but conventionally, in addition to this, the carrier has a portion that extends long in both directions of the disk. It was necessary to have at least an abbreviated prison as a whole.

Recently, there has been a demand for lightweight and small IIO motors for motorcycles, but conventional motors have not been able to adequately meet these demands.

The present invention has been made in view of the above-mentioned circumstances, and has improved the mechanics of the conventional main bin and the arrangement of the pad holding part, and has made it possible to create a motorcycle that is compact, compact and 10% more efficient. The object of the present invention is to provide a disc brake suitable for use in small vehicles that requires a small braking force.

In order to achieve such an object, in the present invention, the number of pad support shafts that straddle the outer periphery of the disk to be provided in the carrier is one, and this is used as a common pad support shaft for supporting a pair of friction pads. In order to prevent the rubbing pad from turning once due to a couple, a III support part and a second support part are provided, each of which is located radially inward of the outer disk station. Since these two supporting parts are arranged to sandwich the disc, they are separated at the disc part, resulting in a Kutogi structure, and one of them is provided on the carrier and the other on the caliper.

With the above-mentioned configuration, the couple generated on the friction pad during braking acts in a direction that reduces the reaction force acting on the common band support shaft during braking. The opposing common pad support shaft can be made small in diameter. In addition, the carrier should have a shape that is approximately on a straight line connecting the common pad support shaft and the pad support part on the rotation center side of the disk, that is, the shape of only the part of the conventional carrier that is attached to the non-rotating member of the vehicle. is completed, the station II of the disk! The part that extends in the direction becomes uncomfortable.

In a preferred embodiment (g) of the present invention, the pad support portions located on the i-turn center side of the disk are each shaped like a shaft.
In another preferred embodiment, the pad supporting portion of the caliper is formed into a groove instead of a ring, and the back metal of the friction pad is inserted into the groove.

Furthermore, another preferred 1i of the present invention! The common pad support shaft and the pad support part, which are respectively provided on the carrier, use round holding means to hold the caliper in the middle. According to yet another preferred embodiment, the common pad support shaft is in the form of a hollow sleeve, and this cabinet is used as a guide pin for slidingly guiding the middle support shaft to the carrier, and a pair of friction rollers are formed on the outer periphery of the common pad support shaft. It is designed to slide and guide the pad.

The present invention will be explained in detail below based on the drawings showing examples thereof.

In FIGS. 1 to 7 showing ljgl addition embodiments of the present invention, in the IFi disk, this -@(first cause right l
1l), the carrier 2 is placed.

This Horse Yaria 2 uses its mounting holes 2a and 2b,
A non-rotating member of a vehicle, for example, as shown in FIG.
It is fixed to the blond fork 3 of the II car, and has an m* shape extending approximately in the radial direction of the disc l. As shown in FIG. 6, a common pad support shaft 4 is fixed to the outer end of the carrier 2 in the radial direction of the disk and extends in the axial direction across the outer wall of the disk L. , a pad support shaft 5 (number wA in the first drawing) extending in the axial direction of the disk l is fixed. The first pad support shaft 5 has a pad guide portion 5a extending toward the disk l, and a caliper guide portion 5b extending away from the disk l.

The caliper guide portions 5b of the common pad support shaft 4 and the first pad support shaft 5 each have a bottomed cylindrical guide portion 6a #6b that can be formed on the caliper 6 on one side of the disk l.
are slidably fitted. The middle fillet 6 straddles the outer periphery of the disk 19, and one side of the disk 1 is equipped with a known cylinder mechanism 7 as a friction pad suppression mechanism. It has a leg portion 6C extending toward the inner end side. A second pad support shaft 8 is integrated from the tip of the leg s6C and extends in the axial direction toward the disk l.

A first jHI pad 9 is placed on the -111 side of the disk l, and a second friction pad 1G is placed on the side of the ninth disk io4#A. 1st. Back metal 9a# of second friction pad 9.10
1olFi, substantially semicircular recesses 9b and 10 that open toward the radially inner end at the radially outer end of the disk l;
b, and the recess 9b, X0b7b, and the outside of the pad support shaft 4 INK! It is moated so that it can move freely. A guide hole 9C is opened at the inner end in the disk radial direction of the back metal 9m in the first friction pad 9, and the guide hole 9C is fitted into the pad guide portion 5m of the 11 pad support shaft 5 so as to be movable. It matches.

Further, a guide hole 10c is opened at the disk radial direction (c) end of the back metal 107I in the second friction pad IO, and the crest guide hole OC is slidably fitted to the second pad support shaft 8. has been done.

In this way, via the caliper 6Fi common pad support @4 and the first support @5 (the caliper guide portion 5b),
Further, the first friction pad 9 is connected to the common pad support shaft 4 and the JL pad support shaft 5 (the pad guide portion 5m thereof), and the second JL friction pad 1G is connected to the common pad support shaft 4 and the second JL pad support shaft 5.
Via the support shaft 8, they are each guided and held slidably in the axial direction of the disk l.

The caliper 6 moves to the right in FIG. 1 due to the reaction force, and the second friction pad 10 is pushed by the leg 6C of the caliper 6. (by pressing it against the other side of the disk l).

During this braking, 11w AK is applied through both friction pads 8.
As shown, the ms torque F acts on the common pad F° support shaft 4, and the 111% second pad support shaft 5.
A couple f acts on 8.

At this time, the resultant force xFi of the reaction force F of the braking torque on the common pad support shaft 4 and the couple F becomes smaller than the braking torque F, as is clear from the graphical solution of the force. That is, the couple f acts to eliminate the braking torque r.

9 to 11 show a second practical example of the present invention, and the same components as those in the above embodiment are given the same reference numerals and their explanations are omitted (this will be explained in the following embodiments). The same applies to examples).

In this example, it is DK to provide JI2I2 support shaft.

A guide 6d extending in the axial direction of the disc l is formed on the leg 6C of the caliper 6, while a back plate 108 of the second friction pad 1 is formed with a guide @6d extending in the axial direction in a direction away from the disc l at a part thereof. The LED is bent and the two shells 6d and 104 are slidably fitted together. That is, the guide groove 6d is configured as a 1s2 support portion. With such a configuration, the center of the second friction pad 1042) can be located on the straight line connecting the common pad support shaft 4 and the guide groove 6d as the second support portion, and thereby the second friction pad 1042) Friction pad No. can be held in a desirable stable posture.

In addition, both plaster pads 9. common pad support 111 of to
The fitting portion for 4 is in the form of a guide hole instead of the semicircular recess 9b, xOb.

In this way, the second support part is formed on the caliper 6 and the second support part is formed on the caliper 6.
16d, the number of parts can be reduced compared to the case where the second support shaft 8 is separately provided. ? “Ripa 6 vs. 6+1-0, (.

The effort is simplified.

12 to 17 show a third embodiment of the present invention, in which the common pad support shaft 11 is shaped like a hollow sleeve. This hollow sleeve-shaped common pad support shaft 11
Guide pins 18, which are assembled from the carrier hole 6 on the disk 10- side, are slidably inserted into the inner part of the guide pins 18, and the semicircular recesses 9b of the first irises 211 support pads 9 and 10 are inserted into the outside thereof.
, lOb are slidably fitted. With such a configuration, the guide bin 12#'i, the eleventh second friction pad 9. Common/Crad support without interfering with lO
11 makes it possible to be slidably guided over a sufficiently long distance, so that the carrier 6 can be stably held on the carrier 2.

In addition, if the guide pin 12 is extended to @K in addition to the disk l, and its tip is integrated with the leg part 60 of the caliper 6, the rigidity of the caliper will also be improved. Further, the caliper 6 is slidable on the first pad support shaft 6 via a separately provided sleeve 13.

As is clear from the above description, the present invention can reduce the diameter of the support shaft corresponding to the conventional main bin, as well as downsize the carrier 4, resulting in a considerably smaller size as a whole. It is possible to achieve reduction in size and weight.

In particular, the carrier extends approximately i in the radial direction of the disk 7.
! Since the disc brake can be shaped like an L line, in cases where the entire disc brake is exposed to the outside, such as when applied to the front wheel of a motorcycle, the carrier itself can be attached to a non-rotating member of the vehicle (front fork). ), it gives a clean look to the exterior as an integral part of the garden, so it can also be desirable from the perspective of the garden area in terms of design.

[Brief explanation of the drawing]

Figures 1 to 6 show the first embodiment of the present invention, where Figure w1 is a front sectional view, Figure 2 is a plan view, Figure 3 is a left side view, and Figure 4 is a right side view. , FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 1, and FIG. 6 is a cross-sectional view of the common pad support 11M1 portion along the disk axis direction. FIG. 7 is a diagram showing a case where the disc brake according to the present invention is applied to the front wheel portion of a motorcycle. FIG. 8 is a diagram showing torque, couple, and OII relationship during braking. 9 to 11 show a second embodiment of the present invention, in which FIG. 9 is a front sectional view, FIG. 1θ is a left side view, and FIG. 1111 is a perspective view of the second thick friction pad. 12 to 17 show a third embodiment of the present invention, in which FIG. 12 is a front sectional view and FIG. 13 is a flat man view. Figure 14 is the left 11th view, Figure 15 is the right l1li view 11.
．． Figure 16 is the xvx-xvt green cross section in Figure 12.
FIG. 7 is a cross-sectional view of the common pad support shaft portion along the disk axis direction. FIG. 18 is a diagram showing the friction pad holding structure in a conventional disc brake and the relationship between the torque and couple generated during braking. l・-1・Disc 2−・・Carrier 3・---Front fork (non-rotating member of the vehicle) 4.
11-Common pad support shaft 5--First support shaft (first support 5) 6--Caliper 9--First friction pad lO--Second friction pad Butt 13...Guidance bin (and 2 others) Fig. 1 Fig. 3 Fig. 2t) Fig. 4 Fig. 9 Fig. 12 Fig. 13 Fig. 14 Fig. 6 f Fig. 15 Fig. 16 Fig. 17

Claims (1)

[Scope of Claims] D) a carrier that is fixed to a non-rotating member of the vehicle by a single stroke of the disc; a caliper that straddles the outside of the disc and is held by the carrier so as to be freely displaceable in the axial direction of the disc; An 11th NII butt disposed at one end of the disk, a second friction pad disposed at the other side of the skeleton disk, and a second friction pad disposed on the other side of the disk, extending in the axial direction of the disk and fixed to the carrier. a common pad support shaft provided on the carrier at one extension of the disc;
a first pad support portion located on the radially inward side of the outer surface of the disk; and a first pad support portion positioned on the other side of the disk with respect to the caliper and located on the radial inner side of the outer surface of the disk; Also, the second friction pad is connected to the common pad support shaft and the second pad support. By the department,
A disc brake in which each of the discs is movably displaceable in the axial direction of the disc. (2. In claim 1, the first and second
Each pad support part is a shaft-shaped object. (3) According to claim 1, the second pad support portion is constituted by a guide groove formed in the caliper. (4) In claim 2, the common pad support shaft and the annular first pad support shaft are arranged so that the key ripper can be freely displaced in the axial direction of the disk with respect to the carrier. It can also be used as a guide. (a) Any one of claims 131 to 4
In paragraph 1, the common pad support shaft is sleeve-shaped,
A guide pin provided Km in one direction of the disc from the caliper is fitted into the sleeve-shaped common/jid support axis circle, and the guide pin 1 is inserted outside the sleeve-shaped common pad support axis.
A device for slidingly guiding the second friction pads respectively.