JPH0630539U - Disc brake caliper guide structure - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the stroke for removing the guide pin to improve the workability of attaching and removing the caliper. A guide pin is formed so that the guide pin is shorter than the inner distance between the caliper inner and outer arms and is fitted and mounted to the outer arm, and a fixture that is inserted into the inner arm and connected and joined to the guide pin main body. The guide pin body is fixed by the fixing tool at a position larger than the fitting length of the outer arm and apart from the inner arm. A spacer may be attached to the fixture to hold the position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is 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 caliper guide structure is particularly used for large vehicles, and calipers are provided on both sides of a rotor. Regarding the improvement of the supporting caliper guide structure.

[0002]

[Prior art]

 The floating caliper type disc brake includes a fixed support disposed on the outer peripheral edge of the disc rotor, and is mounted movably in the axial direction of the disc rotor via a caliper guide including a guide pin. The caliper is equipped with a pair of friction pads that can clamp the disk rotor, and a hydraulic means that causes the friction pads to clamp the rotor. The braking action is carried out by pressing one of the friction pads against the disk rotor. At that time, the caliper is slidably guided by the guide pins and moves in the axial direction of the rotor, and the both surfaces of the rotor are pinched by the pair of friction pads. It has become possible.

By the way, as shown in FIG. 4, a conventional caliper guide structure for guiding sliding of a caliper such as a large vehicle is of a type integrated with a guide pin (FIG. 1A) or a split type. ((2) in the same 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 are faced on both sides of the bridge arm 2 of the fixed support, and the guide pin 1 is inserted from the inner arm 3 side to form the support arm. After passing through 2, the tip is fitted and attached to the caliper outer arm 4. The guide pin 1 is screwed and fixed to the caliper inner arm 3. Also, the split type has a guide pin 1A that is inserted into the caliper inner arm 3 and screwed to the bridge arm 2 of the fixed support, and a guide pin 1B that is fixed to the caliper outer arm 4 and inserted into the bridge arm 2. The pair of guide pins 1A and 1B guide the caliper slide.

[0005]

[Problems to be solved by the device]

 By the way, when removing the caliper during maintenance work, it is necessary to remove the guide pin, but the former caliper guide structure with the former integrated guide pin requires a very long extraction stroke, resulting in workability. There was a very bad drawback. Further, the latter structure having the split type guide pins requires a space on the side of the wheel on which the disc rotor is mounted, and thus has a problem that it can be applied only to some vehicles. Further, since the guide pin and the caliper are screw-coupled to each other, the deformation action of the caliper affects the guide pin, and therefore the pin is bent or deformed due to long-term use, which adversely affects the workability of attaching and detaching the guide pin. There was also a problem to give.

The present invention focuses on the above-mentioned conventional problems, and in particular, the removal stroke of the guide pin when removing the caliper is small, and the caliper deforming action 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]

[Means for Solving the Problems]

 In order to achieve the above object, the caliper guide structure for a disc brake according to the present invention supports a caliper inner and an outer arm with respect to a guide pin inserted in a bridge arm of a fixed support so that the caliper moves in the disc rotor axial direction. In the sliding guide caliper guide structure, the guide pin is formed so as to be shorter than the inner spacing of the caliper inner and outer arms, and is fitted and mounted to the outer arm, and the guide pin body inserted into the inner arm and inserted. The guide pin main body is fixed to a position larger than the fitting length with respect to the outer arm and apart from the inner arm by the fixing tool.

In this case, the fixture and the spacer may have a screw coupling structure, and the caliper inner arm may be sandwiched. In addition, the fitting part between the guide pin body and the caliper outer arm is eccentric with the support bridge arm insertion part and can be rotated to absorb the difference between the caliper arm hole pitch and the support bridge arm hole pitch, and also rust prevention. It is desirable to attach a cap to prevent rusting at the mating part.

[0009]

[Action]

 The operation of the above configuration is as follows. The guide pin body remains by removing the fixture from the caliper inner arm. However, since the length of this guide pin body is smaller than the inner clearance between the inner arm and outer arm of the caliper, the guide pin body can be separated by pulling it out from the fitting part with the caliper outer. With the bridge arm of the fixed support inserted, the caliper can be removed from the fixed support without causing the caliper arm to interfere with the guide pin body. Therefore, when removing the caliper, the stroke for removing the guide pin can be extremely small, and the maintenance workability can be greatly improved.

[0010]

【Example】

 Hereinafter, a specific embodiment of a caliper guide structure for a disc brake according to the present invention will be described in detail with reference to the drawings.

1 and 2 show a caliper guide structure according to the first embodiment. As shown in these figures, the caliper 10 of the disc brake is mounted on a fixed support 12 and is mounted so as to be movable in the axial direction of a disc rotor (not shown). A pair of caliper guides, which guide the axial movement of the caliper 10, 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 includes a guide pin 16 penetrating the bridge arm 14 of the fixed support 12, and the guide pin 16 protruding from both ends of the bridge arm 14. Both ends of the caliper 10 are supported. For this reason, the caliper 10 is provided with an inner arm 22 and an outer arm 24 that project and project on both sides of the bridge arm 14, and these arms 22, 24 and the guide pin 16 are connected to each other. In this case, the inner dimension L between the caliper arms 22 and 24 is naturally set to be larger than the width dimension of the bridge arm 14 to ensure the movement stroke of the caliper 10.

Here, the guide pin 16 is composed of a guide pin body 18 and a fixture 20, and the guide pin body 18 is formed shorter than the inner dimension L of the caliper inner and outer arms 22, 24 ( The length is 1), and the tip is fitted and attached to the outer arm 24. The fixture 20 is inserted into the inner arm 22 and is joined and joined to the other end of the guide pin 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 in which the inner side has a larger diameter than the outer side. Correspondingly, the guide pin body 18 also has a large-diameter pin portion 18A and a small-diameter pin portion 18B. The pin body 18 is attached and detached by inserting and removing it 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 the projecting tip portion is provided with a fitting projection 18C having a smaller diameter. Then, the fitting protrusion 18C is inserted into the 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 resin or other non-rust material is attached to the fitting protrusion 18C, and the cap 30 is interposed on the fitting surface to prevent rusting and bonding.

Further, the fitting protrusion 18C, which is a fitting portion of the guide pin main body 18 to the caliper outer arm 24, serves as an insertion portion into the support bridge arm 14 as shown in FIG. 2 (2). The small diameter pin portion 18B is eccentric and eccentric, and by rotating the guide pin body 18 during mounting, it is possible to absorb the difference between the hole pitch of the caliper outer arm 24 and the hole pitch of the support bridge arm 14. It

On the other hand, the large-diameter pin portion 18 A of the guide pin main body 18 projects from the inner end surface of the bridge arm 14, but is separated from the caliper inner arm 22, so that the inner pin 22 is connected to the inner arm 22. Therefore, the fixture 20 is used. The fixture 20 has a bolt head portion 20A joined to the outer surface of the inner arm 22 and a bolt shaft portion 20B penetrating a jig insertion hole 32 formed in the inner arm 22, and the tip surface of the bolt shaft portion 20B. It has a structure in which a fitting pin 20C is provided on the. Further, a fitting hole 34 capable of receiving the fitting pin 20C is concentrically formed on the end face of the guide pin body 18, and one fitting pin 16 is constituted by the fitting connection.

Here, in order to fix the fixing tool 20 to the caliper inner arm 22, a spacer 36 is attached so as to be interposed between the inner arm 22 and the guide pin 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 so that the inner arm 22 can be clamped and clamped. Therefore, the fixture 20 is fixed to the inner arm 22 with the fitting pin 20C inserted into the fitting hole 34 of the guide pin body 18. A damper seal 38 is attached between the end faces of the spacer 36 and the guide pin body 18 to prevent them from hitting each other and adjust the clearance. In this case, the position dimension T of the pin regulated by the spacer 36 and the damper seal 38 is set to be larger than the fitting length t of the fitting protrusion 18C on the outer side (T> t). Therefore, the fixing tool 20 and the spacer 36 are disengaged, the fixing tool 20 is pulled out, and the spacer 36 and the damper seal 38 are removed, so that the outer arm fits between the inner arm 22 and the guide pin body 18. There is a space larger than the joint length t, which allows the guide pin body 18 to be removed from the outer arm 24.

Reference numeral 40 in the drawing denotes a rubber boot for protecting the sliding portion of the guide pin 16. In the assembling work using the caliper guide structure configured as described above, 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. On the outer side, the fitting protrusion 18C of the guide pin main body 18 is inserted into the fitting hole 28 of the outer arm 24 by rotating the pin to match the pitch. Then, the spacer 36 is arranged between the guide pin body 18 and the inner arm 22 on the inner side, the fixture 20 is inserted from the outer surface side of the inner arm 22, and the inserting pin 20 C at the tip is inserted into the pin inserting hole 34. Meanwhile, the spacer 36 is screwed and fixed. For the disassembling work, the reverse of this operation may be performed.

With such a configuration, the weight of the caliper 10 can be received by the fitting portion at the pin tip on the outer side and the pin tip portion on the inner side. Then, the span of the inner arm 22 and the outer arm 24 can be made large, and the fitting portion is not fixed to the caliper 10 and can slide in the axial direction. Since it does not reach the guide pin 16, the durability is improved. And, in particular, the work for attaching and detaching the caliper 10 needs only the space for attaching and detaching the fixture 20 on the inner side, and therefore the workability is greatly improved.

Next, FIG. 3 shows a second embodiment. The second embodiment is a modification of the joint structure of the fixture 20 to the guide pin body 18. That is, the guide pin body 18 is provided with the fitting pin 42 on the end face thereof, and the bolt shaft portion 20B of the fixture 20 is provided with the pin fitting hole 44 into which the fitting pin 42 is inserted. With such a structure, the substantial length of the guide pin body 18 becomes long, 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. As a result, the work of attaching / detaching the caliper 10 can be similarly easily performed.

According to these embodiments, the withdrawal stroke for disconnecting the guide pin 16 and the caliper 10 is only the withdrawal stroke of the fixture 20, resulting in an extremely small stroke and greatly improving workability. can do. In addition, since it can be performed only by attaching and detaching the screws on the inner side, the number of working steps is smaller than that in the case of the split type guide pin structure. Moreover, since the guide pin 16 and the caliper 10 do not have a screw coupling portion, the influence of the caliper deformation does not affect the guide pin 16, and the deformation of the guide pin does not deteriorate the extraction workability. Further, since the working space for coupling 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]

[Effect of device]

 As described above, according to the caliper guide structure of the disc brake according to the present invention, the guide pin is formed to be shorter than the inner distance between the caliper inner and the outer arm, and the guide pin body fitted and mounted to the outer arm is provided. , A fixing tool that is inserted into the inner arm and connected and joined to the guide pin main body, and the guide pin main body is fixed by the fixing tool at a position larger than the fitting length with respect to the outer arm and apart from the inner arm. Since it is configured, the guide pin removal stroke is particularly small when removing the caliper, and the caliper attachment / detachment workability is improved as a structure in which the deformation of the caliper does not affect the guide pin. The effect is obtained.

[Brief description of 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 a caliper guide according to the same 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]

 10 Caliper 12 Fixed Support 14 Bridge Arm 16 Guide Pin 18 Guide Pin Body 18A Large Diameter Pin 18B Small Diameter Pin 18C Fitting Protrusion 20 Fixing Tool 20A Bolt Head 20B Bolt Shaft 20C Fitting Pin 22 Inner Arm 24 Outer Arm 26 Pin Insert Hole 28 Fitting hole 30 Anti-rust cap 32 Jig insertion hole 34 Pin fitting hole 36 Spacer 38 Damper seal 40 Rubber boot

Claims (2)

[Scope of utility model registration request] 1. A caliper guide structure for supporting a caliper inner and an outer arm with respect to a guide pin inserted into a bridge arm of a fixed support and slidingly guiding the caliper in the disc rotor axial direction, wherein the guide pin is a caliper inner. And a guide pin body which is formed shorter than the inner space of the outer arm and is fitted and mounted to the outer arm, and a fixture which is inserted into the inner arm and connected 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 the outer arm and apart from the inner arm by the fixing tool. 2. A caliper guide structure for a disc brake according to claim 1, wherein the guide pin main body has an outer arm fitting portion and a support bridge arm insertion portion eccentric.