JPH0527368U - Split type carrier disk brake for vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] Each of the joint surface of the caliper body split body made of dissimilar metal, the head of the connecting bolt and the outer peripheral surface of the bolt insertion hole where the head of the bolt comes into contact, is electrically charged. Avoid erosion. [Structure] A non-conductive plate-like spacer 11 provided on the joint surface 10 of the acting portion side divided body 3 and the reaction portion side divided body 4 is projected over the entire circumference to the outside of the joined surface 10. .. A flange 11b is formed on the outer edge of the plate-shaped spacer 11 on the outer peripheral side in the radial direction of the disk, and a flange 11b is formed so as to bend toward the acting portion side divided body 3 so that water droplets such as rainwater adhere to both divided bodies 3 and 4. Prevent. At the tip of the flange 11b, the first shim portion 11c
Is bent so as to face one side surface of the plate-like spacer 11. The first shim portion 11c is sandwiched between the outer peripheral surface of the opening portion of the bolt insertion hole 3b and the head portion 12a of the connecting bolt 12,
The bolt head 12a is prevented from coming into contact with the outer peripheral surface of the opening of the bolt insertion hole 3b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc brake caliper body used in various traveling vehicles such as motorcycles, and more particularly to a structure for preventing galvanic corrosion of a split type caliper body in which two split bodies are made of different metals.

[0002]

[Prior Art]

 Large-sized disc brakes are required in response to higher vehicle speeds. For this reason, it is known that the split body that constitutes the split caliper body is made of a different metal in order to reduce the weight and secure the rigidity with the increase in size. However, because electrolytic corrosion occurs on these joint surfaces due to the potential difference, a part of the plate-like spacer is projected outside the joint surface and is interposed (for example, Japanese Utility Model Laid-Open No. 50-20090). In addition, this plate-shaped spacer is made of a non-conductor to prevent electrolytic corrosion.

[0003]

[Problems to be solved by the device]

 In such a structure, water droplets such as rainwater may adhere to the plate-shaped spacers so as to connect the divided bodies to each other beyond the projecting portions of the plate-shaped spacers, and it is not possible to sufficiently prevent electrolytic corrosion. Sometimes. Further, since the connecting bolt is made of a metal different from that of the two divided bodies, the electrolytic corrosion is also caused between the head of the connecting bolt and the outer peripheral surface of the opening of the bolt insertion hole formed in one of the divided bodies. May occur.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent galvanic corrosion of a contact surface of a split body, a connecting bolt, a sliding pin or the like that constitutes a caliper body. An object of the present invention is to provide a structure of a split type caliper body which can be prevented by a single plate-shaped spacer and can be easily assembled.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the first configuration, a divided body divided into two along the disk circumferential direction is made of a different metal, and a non-conductive plate-like spacer is formed on the joint surface of these divided bodies. In a split type caliper body of a vehicle disc brake, which is interposed and connected by a connecting bolt, the spacer is projected outward over the entire circumference of the joining surface, and the spacer is provided on the outer peripheral side in the disc radial direction. A flange that bends toward the head side of the connecting bolt is formed, a first shim portion is extended to the tip of the flange, and the first shim portion is inserted through the bolt inserted in the one divided body. It is sandwiched between the outer peripheral surface of the opening of the hole and the head of the connecting bolt.

Further, in the second configuration, a divided body divided into two along the disc circumferential direction is formed of a different kind of metal, and a non-conductive plate-like spacer is interposed on the joint surface of these divided bodies. A split caliper body for a vehicle disc brake in which the mounting arms that are connected by a connecting bolt and that project from both sides of one split body are supported by sliding pins on a caliper bracket fixed to the vehicle body. In the above, the spacer is projected outward over the entire circumference of the joint surface, and a flange that bends toward the head side of the connecting bolt is formed on the outer peripheral side of the spacer in the disk radial direction. The first shim portion is extended and the first shim portion is provided between the outer peripheral surface of the opening portion of the bolt insertion hole formed in the one divided body and the head portion of the connecting bolt. While sandwiching the second shim, It is sandwiched between the base end of the mounting arm and the end face of the sliding pin and / or the head of the mounting bolt that fixes the sliding pin to the mounting arm.

[0007]

[Action]

 In the first configuration, the flange of the plate-shaped spacer prevents water droplets such as rainwater from adhering to both split bodies. In addition, the first shim portion extending from the flange prevents direct contact between the connecting bolt and the divided body and prevents occurrence of electrolytic corrosion.

Further, in the second configuration, the second shim portion provided together with the first shim portion prevents direct contact between the mounting arm and the sliding pin and / or the mounting bolt for fixing the sliding pin. , Prevent the occurrence of electrolytic corrosion.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show a first embodiment of the present invention, in which a split type caliper body 1 used for a disc brake has a disc rotor 2 which rotates integrally with a wheel. It is a pin-slide type having an action part side divided body 3 on one side and a reaction part side divided body 4 on the other side, and a pair of sliding pins 6 and 6 to a caliper bracket 5 fixed to the vehicle body. Is held.

A cylinder hole 8 for accommodating the piston 7 is provided in the acting portion side divided body 3 with its disc rotor side opened, and the tip ends of the mounting arms 3 a, 3 a projecting to both sides thereof, respectively. The above-mentioned sliding pin 6 is fixed by a mounting bolt 9, and a reaction force claw 4a is integrally formed on the reaction portion side divided body 4. Further, for example, a lightweight aluminum alloy is used for the action portion side divided body 3, and the reaction portion side divided body 4 is combined using, for example, cast iron.

In the divided bodies 3 and 4, the non-conductive plate-like spacer 11 is sandwiched between the joint surfaces 10 in the disk circumferential direction, and the four connecting bolts 12 are respectively inserted through the bolts of the operating portion side divided body 3. It is inserted into the hole 3b and the through hole 11a of the plate-like spacer 11, and the tip thereof is further screwed and connected to the female screw 4b of the reaction unit side divided body 4.

The caliper bracket 5 is integrally provided with a pair of caliper support arms 5 a, 5 a that are arranged side by side in the disc axial direction outside the disc rotor 2, and the caliper body 1 is divided into the operating portion side. The above-mentioned sliding pins 6 and 6 projecting from the body 3 are inserted into the guide holes 5b of the caliper support arm 5a, respectively, and are supported so as to be movable in the disc axial direction.

The plate-like spacer 11 is formed in such a size that it protrudes outward over the entire circumference of the joint surface 10 of the two divided bodies 3, 4, and the connecting bolt 1 is formed on the outer edge of the disc radial direction outer peripheral side. A flange 11b that is bent toward the head 12a of the second body, that is, toward the acting portion side divided body 3 is provided over the entire length of the caliper body 1 in the disk circumferential direction.

At the tip of the flange 11b, four first shim portions 11c, which are bent so as to face one side surface of the plate-like spacer 11, are integrally formed in a tongue-like shape. The portion 11c is arranged so as to be in close contact with the outer peripheral surface of the opening of the bolt insertion hole 3b when the plate-like spacer 11 is inserted between the divided bodies 3 and 4, and is inserted into the through hole 11d. The connecting bolt 12 is held between the outer peripheral surface of the opening of the bolt insertion hole 3b and the head portion 12a of the connecting bolt 12.

Between the acting portion side divided body 3 and the reaction portion side divided body 4, a pair of friction pads 13, 13 are arranged to face each other with the disc rotor 2 interposed therebetween. Each friction pad 13 is composed of a lining 13a which is in sliding contact with the disc rotor 2 and a back plate 13b which is held by the supporting arms 5a and 5a of the caliper bracket 5. Ear pieces 13c, 13c are provided on both sides of the back plate 13b in a protruding manner. The friction pad 13 includes the ear pieces 13c, 13c which are recessed in the caliper support arms 5a, 5a. 5c is loosely fitted and suspended in the same manner as the caliper body 1 so as to be movable in the disc axial direction.

In this embodiment, as described above, the plate-like spacer 11 sandwiched between the joint surfaces 10 of the divided bodies 3 and 4 is formed large so as to project from the joint surface 10 over the entire circumference. Further, since the flange 11b that bends from the plate-like spacer 11 to the head 12a side of the connecting bolt 12 is provided, the water drops are formed on the outside of the caliper body 1 which is particularly susceptible to water drops such as rainwater. It is possible to prevent the occurrence of electrolytic corrosion as much as possible, since there is no possibility that it will adhere to both of the divided bodies 3 and 4 beyond the spacer 11.

Further, the first shim portions 11c provided at the tips of the flanges 11b prevent electrolytic corrosion between the head portion 12a of the connecting bolt 12 and the outer peripheral surface of the opening portion of the bolt insertion hole 3b. Moreover, since both of these are prevented from electrolytic corrosion by using one plate-shaped spacer 11, the number of parts can be reduced and the assembly work can be done only once.

Further, when the caliper body 1 is assembled using the plate-shaped spacer 11, the plate-shaped spacer 11 is fixed by inserting the connecting bolt 12 into the through hole 11d of the first shim portion 11c. It can be placed in a predetermined position without falling off, and the through holes 11a of the plate-like spacer 11 can be easily aligned coaxially with the bolt through holes 3b and the female screw 4b on both sides, so that the assembling work becomes simple and easy. .. Further, since the contact area with the atmosphere is increased by the flange 11b, the heat dissipation effect during traveling is high.

6 to 8 show a second embodiment of the present invention. In this embodiment, two second shim portions 11e and 11e are added to the plate-like spacer 11 of the first embodiment. The other configuration is the same as that of the first embodiment.

The second shim portions 11e, 11e extend in the anti-disc direction from both side portions of the four first shim portions 11c, and further extend from the outer peripheral side surface of the tip disk of the mounting arm 3a, and further, the bifurcated tongue pieces 11f, 11g. The shape is divided into. Through holes 11h into which the mounting bolt 9 is inserted are formed in the tongue pieces 11f and 11g, respectively, and have substantially the same diameter as the insertion hole 3c of the mounting arm 3a. One of the tongue pieces 11f is L-shaped and is inserted between the one end surface of the mounting arm 3a and the base end portion of the sliding pin 6, and the other tongue piece 11g is a solid plate-shaped member. It is inserted between the other side of the tip and the head 9a of the mounting bolt 9 to prevent direct contact between these three members and prevent the occurrence of electrolytic corrosion.

In the present embodiment, three electrolytic corrosions including the mounting portion of the sliding pin 6 are simultaneously prevented by one plate-shaped spacer 11, so that the number of parts is further reduced as compared with the first embodiment. Therefore, the assembling property can be improved. Further, the tongues 11f and 11g serve as washers between the mounting arm 3a and the sliding pin 6 or the mounting bolt 9, and even when the mounting bolt 9 is tightened with a high torque, it becomes a pin or bolt seat surface. There is no buckling on the side surface of the mounting arm 3a, and there is no torque reduction in the mounting bolt 9.

The first configuration of the present invention described in the first embodiment can be applied not only to the pin slide type but also to the fixed type in which the pistons are opposed to each other. Further, in the first embodiment, the first shim portion of the plate-shaped spacer is formed in a tongue shape according to the number of connecting bolts, but it may be formed in a continuous strip plate shape.

Further, in the second embodiment exemplifying the second configuration of the present invention, the sliding pin is fixed to the mounting arm by the mounting bolt, but the mounting bolt is omitted and the sliding pin is directly fixed to the mounting arm. It can also be applied to formats.

[0025]

[Effect of the device]

 As described above, according to the first configuration of the present invention, the plate-shaped spacer effectively prevents galvanic corrosion between the joint surface of the divided body and the connecting bolt and the divided body. In addition, in the second configuration in which the second shim portion is added, electrolytic corrosion between the mounting arm and the sliding pin and / or the mounting bolt can also be prevented together. Furthermore, in the second configuration, the second shim portion functions as a washer between the mounting arm and the sliding pin or the mounting bolt, and even if the sliding pin or the mounting bolt is tightened with a high torque, the pin or the bolt is tightened. There is no buckling on the side of the mounting arm that is the seating surface, and there is no torque down on the sliding pin or mounting bolt.

Further, as an advantage of both of these configurations, by inserting a bolt or a pin into either one of the shim portions, the plate-like spacer can be arranged between both of the divided bodies without dropping, and the assembling work can be performed. It is very easy to do. Moreover, as a result, the through hole of the plate-like spacer can be naturally aligned with the bolt through hole or the female screw of the split body, so that the assembling work becomes easier. In addition, the flange that bends and protrudes from the plate-shaped spacer exerts a heat dissipation effect during traveling.

[Brief description of drawings]

FIG. 1 is a partial sectional plan view of a disk brake showing a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is a perspective view of a plate-shaped spacer used in this embodiment.

FIG. 6 is a partial sectional plan view of a disc brake showing a second embodiment of the present invention.

FIG. 7 is a front view of FIG.

FIG. 8 is a perspective view of a plate-shaped spacer used in this embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Caliper body, 2 ... Disc rotor, 3 ... Action part side division body, 3b ... Bolt insertion hole, 4 ... Reaction part side division body, 4b ... Female screw, 5 ... Caliper bracket, 6 ... Sliding pin, 9 ... Attachment Bolt, 9a ... head, 10 ... joint surface,
11 ... Plate spacers, 11a, 11d, 11h ... Through holes,
11b ... Flange, 11c ... 1st shim part, 11e ... 2nd
Shim, 11f, 11g ... Tongue piece, 12 ... Connection bolt, 1
2a ... head, 13 ... friction pad

Claims (2)

[Scope of utility model registration request] 1. A vehicle in which a divided body divided into two along the disk circumferential direction is formed of different kinds of metal, and a non-conductive plate-like spacer is interposed on the joint surface of these divided bodies to be connected by a connecting bolt. In a split type caliper body of a vehicle disc brake, the spacer is projected outward over the entire circumference of the joining surface, and a flange bent to the head side of the connecting bolt is provided on the outer peripheral side of the spacer in the disc radial direction. Forming,
A first shim portion is extended on the flange, and the first shim portion is sandwiched between an outer peripheral surface of an opening of a bolt insertion hole formed in the one divided body and a head portion of the connecting bolt. A split-type caliper body for vehicle disc brakes, which is characterized by being equipped. 2. A divided body divided into two along the disk circumferential direction is formed of different metals, and a non-conductive plate spacer is interposed on the joint surface of these divided bodies to be connected with a connecting bolt. , Mounting arms protruding on both sides of one of the divided bodies,
In a split type caliper body of a vehicle disc brake, which is supported by a caliper bracket fixed to a vehicle body via a sliding pin, the spacer is projected outwardly over the entire circumference of the joint surface, and the spacer A flange that bends toward the head side of the connecting bolt is formed on the outer peripheral side of the disk in the disk radial direction, and a first shim portion and a second shim portion are extended to the flange to form the first shim portion The second shim is sandwiched between the outer peripheral surface of the opening of the bolt insertion hole formed in the divided body and the head of the connecting bolt, and the second shim is formed between the base end of the mounting arm and the sliding pin. A split caliper body for a vehicle disc brake, characterized in that it is sandwiched between an end face and / or a head of a mounting bolt for fixing the sliding pin to a mounting arm.