JP2544406Y2 - Divided caliper body for vehicle disc brake - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caliper body of a disc brake used for various traveling vehicles such as motorcycles, and more specifically, a divided caliper body in which two divided bodies are formed of dissimilar metals. The present invention relates to a structure for preventing electric corrosion.

[0002]

2. Description of the Related Art A large disk brake is required to cope with an increase in speed of a vehicle. For this reason, for the purpose of weight reduction and securing of rigidity with the increase in size, there has been known a structure in which a divided body constituting a divided caliper body is made of a dissimilar metal. However, since electric erosion due to a potential difference occurs on these joint surfaces, a part of the plate-shaped spacer is interposed so as to protrude outward from the joint surface (for example, Japanese Utility Model Application Laid-Open No. 50-2009).
No. 0), and furthermore, this plate-shaped spacer is made of a non-conductive material to prevent electrolytic corrosion.

[0003]

[Problems to be Solved by the Invention] In such a configuration, water droplets such as rainwater may adhere to the two divided bodies beyond the projecting portion of the plate spacer, In some cases, sufficient prevention of electrolytic corrosion cannot be achieved. Also, since the connecting bolt is also formed of a different metal from both divided bodies,
Electrocorrosion may also occur 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.

The present invention has been made in view of such circumstances, and its purpose is to reduce the electrolytic corrosion of the contact surfaces of the divided body, the connecting bolts, the sliding pins, and the like constituting the caliper body. An object of the present invention is to provide a structure of a divided caliper body which can be prevented by a single plate-shaped spacer and can be easily assembled.

[0005]

In order to achieve the above-mentioned object, in a first configuration, a divided body divided into two along the disk circumferential direction is formed of a dissimilar metal, and a joining surface of these divided bodies is In a split caliper body for a vehicle disc brake connected with a connecting bolt with a non-conductive plate-shaped spacer interposed therebetween, the spacer is projected outward over the entire periphery of the joint surface, and A flange that bends toward the head side of the connection bolt is formed on the outer peripheral side in the disk radial direction, and a first shim portion is extended at the tip of the flange.
The shim is sandwiched between an outer peripheral surface of an opening of a bolt insertion hole formed in one of the divided bodies and a head of the connection bolt.

In the second configuration, a divided body divided into two along the circumferential direction of the disk is formed of a dissimilar metal, and is connected to a joint surface of these divided bodies with a nonconductive plate-shaped spacer interposed therebetween. In a split type caliper body of a vehicle disc brake supported by bolts and mounting arms protruding on both sides of one of the divided bodies via sliding pins on a caliper bracket fixed to the vehicle body, The spacer is projected outwardly over the entire circumference of the joining surface, and a flange is formed on the outer peripheral side of the spacer in the radial direction of the disc so as to bend toward the head side of the connecting bolt.
A shim portion and a second shim portion are extended, and the first shim portion is sandwiched between an outer peripheral surface of an opening of a bolt insertion hole formed in the one of the divided bodies and a head of the connection bolt. And the second
A shim is sandwiched between a base end of the mounting arm and an end face of the sliding pin and / or a head of a mounting bolt for fixing the sliding pin to the mounting arm.

[0007]

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

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

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 5 show a first embodiment of the present invention, in which a divided caliper body 1 used for a disk brake has a disk rotor 2 which rotates integrally with wheels. A pin-sliding type having a working part-side divided body 3 on one side and a reaction part-side divided body 4 on the other side, and via a pair of sliding pins 6, 6 on a caliper bracket 5 fixed to the vehicle body. Is held.

A cylinder hole 8 for accommodating a piston 7 is provided in the working portion side divided body 3 so as to open on the disk rotor side. At the tips of the mounting arms 3a, 3a projecting from both sides,
Each of the above-mentioned sliding pins 6 is fixed by a mounting bolt 9, and a reaction force claw 4 a is formed integrally with the reaction portion side divided body 4. Further, the working portion side divided body 3 is made of, for example, a lightweight aluminum alloy, and the reaction portion side divided body 4 is combined with, for example, cast iron.

The divided bodies 3 and 4 sandwich a non-conductive plate-shaped spacer 11 on the joint surface 10 in the disk circumferential direction, and insert four connecting bolts 12 into the bolts of the operating part side divided body 3 respectively. The hole 3b is inserted into the through hole 11a of the plate-shaped spacer 11, and the distal end thereof is screwed and connected to the female screw 4b of the reaction portion side divided body 4.

The caliper bracket 5 has a disk low
A pair of caliper supporting arms 5a, 5a arranged side by side in the axial direction of the disk outside the rotor 2 are integrally provided. , 6 with guide holes 5 of caliper support arm 5a, respectively.
b and is supported so as to be movable in the disk axis direction.

The plate-like spacer 11 is formed in such a size that it protrudes outward over the entire periphery of the joint surface 10 of the two divided bodies 3 and 4, and has a connecting bolt 12 Of the caliper body 1 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-shaped spacer 11 are integrally formed in a tongue shape, and these first shim portions 11c are formed. The connecting bolts are disposed so as to be in close contact with the outer peripheral surface of the opening of the bolt insertion hole 3b when the plate-shaped spacer 11 is inserted between the divided bodies 3 and 4, and are connected to the connection holes 11d. 12, the pin is sandwiched between the outer peripheral surface of the opening of the bolt insertion hole 3 b and the head 12 a of the connection bolt 12.

A pair of friction pads 13, 13 is provided between the working portion side divided body 3 and the reaction portion side divided body 4, and a pair of friction pads.
Are arranged opposite to each other with the heater 2 interposed therebetween. Each friction pad 13
Is a lining 13a that comes into sliding contact with the disk rotor 2,
And a back plate 13b held by the support arms 5a of the caliper bracket 5. Ear pieces 13c, 13c are projected from both sides of the back plate 13b, and the friction pad 13 applies the ear pieces 13c, 13c to the caliper support arm 5.
a and 5a are loosely fitted into the pad guide grooves 5c and 5c, and are suspended like the caliper body 1 so as to be movable in the disk axial direction.

In this embodiment, as described above, the plate-shaped spacer 11 sandwiched between the joint surfaces 10 of the divided bodies 3 and 4 is formed large so as to protrude from the joint surface 10 over the entire circumference. Since a flange 11b that bends from the plate-shaped spacer 11 to the head 12a of the connecting bolt 12 is provided, the water-droplet is formed especially on the outside of the caliper body 1 where water droplets such as rainwater are relatively easily applied. There is no danger of sticking over the two divided bodies 3 and 4 beyond 11, and the occurrence of electrolytic corrosion can be prevented as much as possible.

Also, a first flange provided at the tip of the flange 11b is provided.
The shim portions 11c are respectively connected to the heads 12a of the connection bolts 12.
Electrolytic corrosion between the bolt and the outer peripheral surface of the opening of the bolt insertion hole 3b is prevented. In addition, the prevention of electrolytic corrosion of both is achieved by a single plate
Since it is performed using the antenna 11, the number of parts can be reduced.
Further, the assembling work is completed only once.

Further, when assembling the caliper body 1 using the plate-shaped spacer 11, the through hole 11 of the first shim portion 11c is required.
By inserting the connecting bolt 12 into d, the plate-shaped space
The screw 11 can be arranged at a predetermined position without dropping, and the through hole 11a of the plate spacer 11 can be easily aligned coaxially with the bolt insertion hole 3b and the female screw 4b on both sides, so that the assembling work is extremely simple. Becomes Furthermore, since the contact area with the atmosphere is increased by the flange 11b, the heat radiation effect during traveling is high.

FIGS. 6 to 8 show a second embodiment of the present invention. In this embodiment, the plate-shaped spacer 11 of the first embodiment is provided with:
Two second shim portions 11e, 11e are added,
The other configuration is the same as that of the first embodiment.

The second shim portions 11e, 11e have four first shims 11e.
It extends from both sides of the shim portion 11c in the direction opposite to the disk, and is further divided into two forked tongues 11f and 11g from the outer peripheral side surface of the distal end disk of the mounting arm 3a.
Through holes 11h into which the mounting bolts 9 are inserted are formed in the tongue pieces 11f and 11g to have substantially the same diameter as the insertion holes 3c of the mounting arms 3a. One tongue 11f is L-shaped, and is inserted between one end side of the mounting arm 3a and the base end of the sliding pin 6, and the other tongue 11g is a solid plate.
The other end of the mounting arm 3a and the head 9a of the mounting bolt 9
And prevents direct contact between these three members, thereby preventing the occurrence of electrolytic corrosion.

In the present embodiment, three electrolytic corrosion preventions including the mounting portion of the sliding pin 6 are simultaneously performed by one plate-shaped spacer 11, so that the number of parts can be further reduced as compared with the first embodiment. The assemblability can be improved. Further, the tongue pieces 11f and 11g serve as washers between the mounting arm 3a and the sliding pin 6 or the mounting bolt 9, so that even if the mounting bolt 9 is tightened with high torque, the mounting becomes a pin or bolt seat surface. There is no buckling on the side surface of the arm 3a, and the mounting bolt 9 has no torque reduction.

The first configuration of the present invention described in the first embodiment can be applied to a fixed type in which a piston is opposed to the pin slide type, in addition to the pin slide type. Further, in the first embodiment, the first shim portion of the plate-shaped spacer has a tongue-like shape according to the number of connecting bolts.

Further, in the second embodiment illustrating 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]

[Effects of the Invention] As described above, according to the first configuration of the present invention, a single plate-shaped spacer can effectively prevent electrolytic corrosion between the joint surface of the divided body and the connecting bolt and the divided body. 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. Further, in the second configuration, the second shim portion serves 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 high torque, the pin or the bolt is not removed. There is no buckling on the side of the mounting arm that serves as the seat surface, and there is no torque reduction in the sliding pins and mounting bolts.

Further, as an advantage of these two configurations, by inserting a bolt or a pin into one of the shims,
The plate-shaped spacer can be arranged between both divided bodies without falling off,
Assembly work can be performed very easily. Moreover, this allows the through holes of the plate-shaped spacers to naturally match the bolt insertion holes and the female threads of the divided body, so that the assembling work is further facilitated. Further, the flanges that bend and protrude from the plate-shaped spacer exhibit a heat radiation effect during traveling.

[Brief description of the 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. 1;

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

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

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

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

FIG. 7 is a front view of FIG. 6;

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Caliper body, 2 ... Disk rotor, 3 ... Working part side divided body, 3b ... Bolt insertion hole, 4 ... Reaction part side divided body, 4b ... Female screw, 5 ... Caliper bracket, 6 ... Sliding pin, 9 ... Mounting Bolt, 9a ... head, 10 ... joining surface,
11: plate-shaped spacer, 11a, 11d, 11h: through hole,
11b ... flange, 11c ... 1st shim part, 11e ... 2nd
Shim part, 11f, 11g ... tongue piece, 12 ... connecting bolt, 1
2a: Head, 13: Friction pad

Claims (2)

(57) [Scope of request for utility model registration] 1. A vehicle in which divided bodies divided into two along the disk circumferential direction are formed of dissimilar metals, and a joint surface of these divided bodies is connected to each other by connecting bolts with a non-conductive plate-shaped spacer interposed therebetween. In the split type caliper body of the disc brake for use, 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 provided on the outer peripheral side in the disc radial direction of the spacer. Forming
A first shim portion is extended to 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 of the divided bodies and a head of the connection bolt. A split caliper body for a vehicle disc brake, characterized by being mounted. 2. A divided body divided into two along a disk circumferential direction is formed of a dissimilar metal, and is connected to a joint surface of these divided bodies with a connecting bolt with a non-conductive plate-shaped spacer interposed therebetween. , Mounting arms protruding on both sides of one of the divided bodies,
In a split caliper body of a vehicle disc brake supported via a slide pin on a caliper bracket fixedly mounted on a vehicle body, the spacer projects outward over the entire circumference of the joint surface, and the spacer A flange which bends toward the head side of the connecting bolt is formed on the outer peripheral side in the disk radial direction, and a first shim portion and a second shim portion are extended on the flange, and the first shim portion is connected to the one shim. While being sandwiched between the outer peripheral surface of the bolt insertion hole formed in the divided body and the head of the connection bolt, a second shim is provided between the base end of the mounting arm and the sliding pin. A split caliper body for a disc brake for a vehicle, characterized in that the caliper body is interposed between an end face and / or a head of a mounting bolt for fixing the sliding pin to a mounting arm.