JP2578334Y2 - Disc brake caliper guide structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a caliper guide structure having a guide pin for slidingly guiding a floating caliper of a disc brake with respect to a fixed support. The present invention relates to an improvement in a caliper guide structure for supporting a caliper on both sides.

[0002]

2. Description of the Related Art A floating caliper type disc brake has a fixed support disposed on an outer peripheral edge of a disc rotor, and is mounted on a fixed support movably in the axial direction of the disc rotor via a caliper guide including a guide pin. I have. The caliper is provided with a pair of friction pads capable of clamping the disk rotor, and hydraulic means for causing the friction pads to perform a rotor clamping action. The braking action is performed by pressing one friction pad against the disk rotor,
At this time, the caliper is slidably guided by the guide pin and moves in the rotor axial direction, so that both surfaces of the rotor can be pressed by a pair of friction pads.

As shown in FIG. 4, a conventional caliper guide structure for guiding a slide of a caliper of a large-sized vehicle or the like is, as shown in FIG.
A divided type ((2) in the figure) is known.

The guide structure of the integrated guide pin 1 is such that the caliper inner arm 3 and the caliper outer arm 4 face both sides of the bridge arm 2 of the fixed support, the guide pin 1 is inserted from the inner arm 3 side, and the support arm is inserted. 2
After that, the tip is fitted and mounted on the caliper outer arm 4. The guide pin 1 is screwed and fixed to the caliper inner arm 3.
Further, the split type has a guide pin 1A inserted into the caliper inner arm 3 and screwed to the bridge arm 2 of the fixed support, and a guide pin 1B fixed to the caliper outer arm 4 and inserted through the bridge arm 2. And
The slide guide of the caliper is performed by the pair of guide pins 1A and 1B.

[0005]

When the caliper is removed during maintenance work, it is necessary to remove the guide pin. However, in the former conventional caliper guide structure having the integrated guide pin, the removal stroke is short. There was a drawback that the work became very long and the workability was very poor. In addition, the latter structure having a split type guide pin requires a space on the wheel side on which the disk rotor is mounted, and thus has a problem that it can be applied to only some vehicles. In addition, since the guide pin and the caliper are screw-coupled, the caliper deforms the guide pin, and as a result of long-term use, the pin is deformed such as bending, which adversely affects the workability of attaching and detaching the guide pin. There was also a problem to give.

The present invention pays attention to the above-mentioned conventional problems. In particular, when removing the caliper, the stroke for pulling out the guide pin can be made small, and the caliper deformation operation does not affect the guide pin. An object of the present invention is to provide a disc brake caliper guide structure with improved performance.

[0007]

In order to achieve the above object, a disc brake caliper guide structure according to the present invention supports a caliper inner and an outer arm with respect to a guide pin inserted through a bridge arm of a fixed support. A caliper guide structure for slidingly guiding the caliper in the axial direction of the disk rotor, wherein the guide pin is formed to be shorter than the inner clearance between the caliper inner and the outer arm and is fitted and mounted to the outer arm; The guide pin body is formed by a fixing tool which is inserted into the inner arm and is connected to and joined to the guide pin main body, and the guide pin main body is fixed to a position larger than the fitting length to the outer arm by the fixing tool and away from the inner arm. It is.

In this case, the fixing tool and the spacer may have a screw connection structure so as to sandwich the caliper inner arm. In addition, the fitting portion between the guide pin body and the caliper outer arm is eccentric with the support bridge arm insertion portion, and is rotated to absorb the difference between the hole pitch of the caliper arm and the hole pitch of the support bridge arm. Attach the rust cap,
It is desirable to prevent rusting at the fitting part.

[0009]

The operation of the above arrangement is as follows. By removing the fixture from the caliper inner arm, the guide pin body remains. However, since the length of the guide pin body is smaller than the inner distance between the inner arm and the outer arm of the caliper, the guide pin body is pulled out from the fitting portion with the caliper outer and separated, so that the guide pin body is separated. With the penetrating through the bridge arm of the fixed support, the caliper can be removed from the fixed support without causing the arm of the caliper to interfere with the guide pin body. Therefore, when removing the caliper, the guide pin withdrawal stroke may be extremely small, and maintenance workability can be greatly improved.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a caliper guide structure of a disc brake according to the present invention.

FIGS. 1 and 2 show a caliper guide structure according to a first embodiment. As shown in these figures, the caliper 10 of the disc brake is mounted on a fixed support 12, and is movably mounted in the axial direction of a disc rotor (not shown). A pair of caliper guides for guiding the caliper 10 in the axial direction are provided on both sides along the rotor rotation direction so that the caliper 10 can move in parallel.

As shown in detail in FIG. 2A, each caliper guide has a guide pin 16 penetrating through the bridge arm 14 of the fixed support 12, and a guide pin 16 projecting from both ends of the bridge arm 14. The caliper 10 is supported at both ends. For this purpose, the caliper 10 is provided with an inner arm 22 and an outer arm 24 which protrude and protrude on both sides of the bridge arm 14,
The two arms 22 and 24 are connected to the guide pin 16. In this case, the caliper arm 2
The inner dimension L between 2 and 24 is naturally set to be larger than the width dimension of the bridge arm 14, and the caliper 10
In order to secure the moving stroke.

The guide pin 16 comprises a guide pin body 18 and a fixture 20. The guide pin body 18 is provided with a caliper inner and an outer arm 2.
Formed shorter than the inner dimension L of 2, 24 (length = 1),
The distal end is fitted and mounted on the outer arm 24. The fixing tool 20 is inserted through the inner arm 22 and is connected and joined to the other end of the guide pin main body 18.

First, a pin insertion hole 26 is formed in the bridge arm 14 of the fixed support 12. The inner diameter of the pin insertion hole 26 is a two-step hole whose inner side is larger than the outer side, and the guide pin main body 18 also has a large diameter pin portion 18A and a small diameter pin portion 18B corresponding to this. The attachment / detachment of the main body 18 is performed by inserting / removing on the inner side. The small-diameter pin portion 18B of the guide pin main body 18 projects from the outer end surface of the bridge arm 14, and a fitting projection 18C having a smaller diameter is provided at the projecting tip. The fitting projection 18C is inserted into a fitting hole 28 formed in the caliper outer arm 24 to support the caliper outer side. At this time, a rust-preventive cap 30 made of a resin or other non-rust material is attached to the fitting projection 18C.
0 is interposed in the fitting surface to prevent rusting and joining.

Further, the fitting projection 18 serving as a fitting portion of the guide pin body 18 to the caliper outer arm 24 is provided.
2C, as shown in FIG. 2 (2), the guide pin body 18 is eccentric with the track center of the small-diameter pin portion 18B serving as an insertion portion to the support bridge arm 14, and rotates the guide pin main body 18 at the time of mounting. By doing so, the difference between the hole pitch of the caliper outer arm 24 and the hole pitch of the support bridge arm 14 can be absorbed.

On the other hand, the large-diameter pin portion 1 of the guide pin body 18
8A protrudes from the inner end surface of the bridge arm 14, but is separated from the caliper inner arm 22, so that the fixing tool 20 is used to connect with the inner arm 22. This fixture 20 is the inner arm 2
Bolt head 20A, inner arm 2 joined to the outer surface of
Shaft part 2 penetrating through jig insertion hole 32 formed in
0B, and a structure in which a fitting pin 20C is provided on the tip end surface of the bolt shaft portion 20B. A fitting hole 34 is formed concentrically on the end face of the guide pin main body 18 so as to receive the fitting pin 20C, and one fitting pin 16 is formed by the fitting connection.

Here, in order to fix the fixing tool 20 to the caliper inner arm 22, a spacer 36 is attached between the inner arm 22 and the guide pin main body 18. The spacer 36 is formed of a nut member, which can be screwed to the bolt shaft portion 20B of the fixture 20, and can clamp and hold the inner arm 22. Therefore, the fixing tool 20 is fixed to the inner arm 22 in a state where the fitting pin 20C is inserted into the fitting hole 34 of the guide pin main body 18. In addition,
A damper seal 38 is attached between the spacer 36 and the end surface of the guide pin main body 18 to prevent the two from abutting and adjust the gap. In this case, the position dimension T of the pin regulated by the spacer 36 and the damper seal 38 is set larger than the fitting length t of the outer-side fitting projection 18C (T> t). Therefore, the fixture 20 and the spacer 3
6, the fixture 20 is pulled out, and the spacer 36,
By removing the damper seal 38, there is a space between the inner arm 22 and the guide pin main body 18 that is longer than the fitting length t on the outer side, so that the guide pin main body 18 can be removed from the outer arm 24. It has become something.

In the figure, reference numeral 40 denotes a rubber boot for protecting the sliding portion of the guide pin 16. In the assembling operation using the caliper guide structure thus configured, first, the guide pin main body 18 is attached to the pin insertion hole 26 of the fixed support 12, and then the caliper 10 is set at a predetermined position. At the outer side, the fitting projection 18C of the guide pin main body 18 is rotated into the pin and the pitch is adjusted to be inserted into the fitting hole 28 of the outer arm 24. Then, a spacer 36 is arranged between the guide pin main body 18 and the inner arm 22 on the inner side, the fixing tool 20 is inserted from the outer surface side of the inner arm 22, and the insertion pin 20C at the tip is inserted into the pin insertion hole 34 while the spacer is inserted. It is screwed to 36 and fixed. The disassembly operation may be performed in the reverse of this operation.

According to such a configuration, the weight of the caliper 10 can be received by the fitting portion at the tip of the outer pin and the tip of the pin at the inner side. And inner arm 2
2 and the outer arm 24 can have a large span, and since the fitting portion is not fixed to the caliper 10 and can slide in the axial direction, the influence of the deformation action due to the axial load on the caliper 10 affects the guide pin 16. Because it does not reach,
The durability is improved. In particular, the work of attaching and detaching the caliper 10 only needs to be a space for attaching and detaching the fixture 20 on the inner side, so that the workability is greatly improved.

Next, FIG. 3 shows a second embodiment. This second
In the embodiment, the joining structure of the fixture 20 to the guide pin main body 18 is modified. That is, the fitting pin 42 is provided on the end surface of the guide pin main body 18, and the pin fitting hole 44 into which the fitting pin 42 is inserted into the bolt shaft portion 20 </ b> B of the fixture 20.
Is provided. With such a structure, the substantial length of the guide pin main body 18 becomes longer, but the interval T from the tip of the fitting pin 42 to the inner surface of the inner arm 22 is set to be larger than the fitting length t on the outer side. Accordingly, the work of attaching and detaching the caliper 10 can be easily performed.

According to these embodiments, the withdrawal stroke for releasing the connection between the guide pin 16 and the caliper 10 is only the withdrawal stroke of the fixture 20, and the stroke is extremely small, thereby greatly improving the workability. it can. Further, since the operation can be performed only by attaching and detaching the screw on the inner side, the number of working steps is reduced as compared with the case of the split type guide pin structure. In addition, since the guide pin 16 and the caliper 10 do not have a threaded joint, the influence of the deformation of the caliper does not reach the guide pin 16 and the removal workability due to the deformation of the guide pin does not occur. Further, since the work space for connecting the guide pin 16 and the caliper 10 on the outer side is small, and there is no work on the outer surface side of the outer arm 24, the maintenance work becomes very easy.

[0022]

As described above, according to the disc brake caliper guide structure of the present invention, the guide pin is formed to be shorter than the inner clearance between the caliper inner and the outer arm, and is fitted and mounted to the outer arm. A guide pin main body, and a fixture that is inserted into the inner arm and is connected to and joined to the guide pin main body. The guide pin body is larger than the fitting length with respect to the outer arm by the fixture and is located at a position away from the inner arm. Since it is configured to be fixed, the removal stroke of the guide pin can be small especially when the caliper is removed, and the workability of attaching and detaching the caliper can be improved as a structure in which the deformation action of the caliper does not affect the guide pin. An excellent effect is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a disc brake showing a cross section of a main part having a caliper guide structure according to a first embodiment.

FIG. 2 is a sectional view of the caliper guide of the embodiment.

FIG. 3 is a sectional view of a caliper guide according to a second embodiment.

FIG. 4 is a sectional view of a conventional caliper guide.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Caliper 12 Fixed support 14 Bridge arm 16 Guide pin 18 Guide pin main body 18A Large diameter pin part 18B Small diameter pin part 18C Fitting protrusion 20 Fixing tool 20A Bolt head 20B Bolt shaft part 20C Fitting pin 22 Inner arm 24 Outer arm 26 Pin insertion Hole 28 Fitting hole 30 Rust prevention cap 32 Jig insertion hole 34 Pin insertion hole 36 Spacer 38 Damper seal 40 Rubber boot

Claims (2)

(57) [Scope of request for utility model registration] In a caliper guide structure for supporting a caliper inner and an outer arm with respect to a guide pin inserted through a bridge arm of a fixed support and slidingly guiding a caliper in an axial direction of a disk rotor, the guide pin is a caliper inner. And a guide pin body formed to be shorter than the inner distance between the outer arms and fitted to the outer arm, and a fixing tool inserted into the inner arm and connected to and joined to the guide pin body. A caliper guide structure for a disc brake, wherein the main body is fixed at a position larger than a fitting length with respect to an outer arm by the fixing tool and away from the inner arm. 2. A caliper guide structure for a disc brake according to claim 1, wherein the guide pin body has an eccentric portion between a fitting portion to the outer arm and a support bridge arm insertion portion.