JP2009002482A - Pin slide type vehicle disc brake - Google Patents

Abstract

[PROBLEMS] To reduce the number of parts and improve the caliper body mounting accuracy, and to perform a function inspection of a disc brake with a slide pin before it is assembled to a bracket.
In a disk of a caliper body 8, a first slide pin 6 and a second slide pin 7 are connected to a disk inner periphery bracket 3a and a disk outer periphery bracket 3b formed in a main body 3c of a bottom case 3. The peripheral mounting arm 8g and the disk outer peripheral mounting arm 8h are connected to each other. The first slide pin 6 includes a sleeve 14 that is movably inserted into a pin insertion hole 8i formed in the disk inner peripheral mounting arm 8g, and a distal-side male screw portion 15a that is inserted through the sleeve 14 and protrudes from the sleeve 14. And a bolt member 15 that is screwed onto the disc inner peripheral bracket 3a.
[Selection] Figure 1

Description

  The present invention relates to a pin slide type vehicle disc brake used for a bar handle vehicle such as a motorcycle or a tricycle, and more specifically, a disc that performs a braking action by guiding a caliper body in a disc axial direction by a pair of slide pins. Regarding brakes.

A pin slide type vehicle disc brake is a bracket in which a caliper body of a disc brake is supported by a bracket fixed to a vehicle body through a pair of slide pins so as to be movable in the disc axial direction. Is protruded from the bracket side and is inserted into the pin insertion hole on the caliper body side, and the other slide pin is protruded from the caliper body side and is inserted into the pin insertion hole on the bracket side. Further, a pair of brackets are integrally formed on the bottom case of the front fork, and a caliper body is supported on the brackets via a pair of slide pins so as to be movable in the disk axial direction (see, for example, Patent Document 1). A separate bracket is fixed to the front fork, and the caliper body is supported by the bracket via a pair of slide pins so that the caliper body can be moved in the disk axial direction, and the pins formed on the slide pin shaft and the caliper body mounting arms There is a type in which a sleeve is interposed between the insertion hole and a front-side male screw portion protruding from the sleeve and screwed to the bracket (for example, see Patent Document 2).
Japanese Patent No. 3630655 JP 58-163833 A

  However, in the above-mentioned Patent Document 1, since the pair of brackets are integrally formed with the bottom case, the number of parts can be reduced. However, the caliper body is not mounted after the slide pins are previously provided on the brackets. Because it has to be assembled, it was not possible to test the function of a disc brake with a slide pin before it was assembled to the bracket.

  Further, in Patent Document 2, the bracket is a separate body from the front fork, and a sleeve is interposed between the shaft portion of the slide pin and the pin insertion hole formed in the mounting arm, and the tip protruding from the sleeve Since the side male screw part is screwed to the bracket, the disc brake with the slide pin can be functionally tested before it is assembled to the bracket, but the caliper body is attached to the vehicle body via the bracket, so the friction pad In order to reduce the drag with respect to the disk rotor, it is necessary to consider more than necessary for the mounting accuracy.

  Therefore, the present invention aims at reducing the number of parts and improving the accuracy of caliper body mounting, and for a pin slide type vehicle capable of performing a function test on a disc brake with a slide pin before it is assembled to a bracket. It aims to provide a disc brake.

  In order to achieve the above object, the present invention is formed on a caliper body of a disc brake via a pair of slide pins in a pair of brackets formed integrally with a bottom case provided at a lower end of a front fork and supporting a front wheel. In a pin slide type vehicle disc brake that connects a pair of mounting arms and supports the caliper body so as to be movable in the disc axial direction, a first slide pin is attached to a disc inner peripheral bracket formed on the main body of the bottom case. The mounting arm on the inner periphery side of the disk is connected to the bracket on the outer periphery side of the disk protruding from the main body of the bottom case to the outer periphery side of the disk rotor, and the mounting arm on the outer periphery side of the disk is connected via the second slide pin. The first slide pin can be moved to the pin insertion hole formed on the inner arm of the disc A sleeve is passed, is inserted into the sleeve, it is characterized in that the distal side male screw portion projecting from the sleeve and a bolt member screwed into the disc inner circumference side bracket.

  By forming the present invention as described above, since the bracket is integrally formed with the bottom case, the number of parts can be reduced. Further, the accuracy of attaching the caliper body to the vehicle body can be improved, and the drag of the friction pad with respect to the disc rotor can be reduced. Furthermore, since the slide pin is not provided on the bracket side, the function inspection of the disc brake with the slide pin can be performed alone before the caliper body is assembled to the bracket. After the inspection, as is well known, the second slide pin protruding from the caliper body side is inserted into the pin insertion hole on the bracket side. Next, the sleeve of the first slide pin is inserted into the pin insertion hole of the mounting arm on the inner periphery side of the disk, the bolt member of the first slide pin is inserted into this sleeve, and the male screw portion on the front end side is attached to the bracket on the inner periphery side of the disk. The caliper body is assembled to the bracket by screwing.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a cross-sectional view taken along the line II of FIG. 2, FIG. 2 is a front view of the disc brake, FIG. 3 is a plan view of the disc brake, and FIG.

  The disc brake 1 is pivotally supported by an axle 4 together with a front wheel (not shown) on the bottom case 3 of the front fork 2 and rotates in the direction of arrow A together with the front wheel when the vehicle advances, and one side of the disc rotor 5 Slidable in the disc axial direction via the first slide pin 6 and the second slide pin 7 to the disc inner peripheral bracket 3a and the disc outer peripheral bracket 3b formed integrally with the bottom case 3. A caliper body 8 to be supported, and a pair of friction pads 9 and 9 disposed opposite to each other with the disk rotor 5 interposed between the action portion 8a and the reaction portion 8b of the caliper body 8 are provided.

  The bottom case 3 is formed by integrally forming the disc inner peripheral bracket 3a and the disc outer peripheral bracket 3b on a main body 3c provided at the lower portion of the front fork 2, and the disc inner peripheral bracket 3a A plate-like body protruding from the inner surface of the vehicle body 3c is provided with a female screw hole 3d into which the first slide pin 6 is screwed. The disk outer periphery side bracket 3b is provided with a bag-like pin insertion hole 3e that protrudes from the main body 3c to the disk rotor outer periphery side and into which the shaft portion 7a of the second slide pin 7 is inserted.

  The caliper body 8 includes the above-described action portion 8a and reaction portion 8b disposed on both sides of the disk rotor 5, and a bridge portion 8c that connects the action portion 8a and the reaction portion 8b across the outer periphery of the disk rotor 5. A bottomed cylinder hole 8d, 8d is arranged in parallel with the disk rotor side on the action part 8a, and a reaction force claw 8e is formed on the reaction part 8b. Pistons 10 are inserted into the cylinder holes 8d and 8d so as to be fluid-tight and movable, respectively, and hydraulic chambers 11 are defined between the pistons 10 and the bottom of the cylinder hole 8d. Guide arms 8f and 8f of the hanger pin 12 project from the disk entry side of the action part 8a and the reaction part 8b, and a first slide pin is provided between the disk inner peripheral side and the disk delivery side of the action part 8a. A disc inner peripheral mounting arm 8g and a disc outer peripheral mounting arm 8h are respectively extended through the disc 6 and the second slide pin 7 respectively.

  The disk inner peripheral side mounting arm 8g has a pin insertion hole 8i formed through in the disk axial direction, and the elastic bush 13, the sleeve 14 of the first slide pin 6 and the bolt member 15 are inserted into the pin insertion hole 8i. . Further, the disk outer peripheral side mounting arm 8h is formed on the outer side of the outer peripheral edge of the disk rotor 5 and extending to the disk outlet side of the action portion 8a, and is formed with a female screw hole 8j for screwing the second slide pin 7. A second slide pin 7 projects from the female screw hole 8j.

  The first slide pin 6 includes a sleeve 14 that is movably inserted into the pin insertion hole 8i of the disk inner peripheral side mounting arm 8g via an elastic bush 13, and a bolt member 15 that is inserted into the sleeve 14. Yes. The bolt member 15 includes the front end side male screw portion 15a, the shaft portion 15b, and the head portion 15c, and the axial length of the bolt member 15, the sleeve 14, and the pin insertion hole 8i is determined by the pin insertion hole. When the length of the sleeve 14 is longer than that of the sleeve 8i and the length of the bolt member 15 is longer than that of the sleeve 14, and the first slide pin 6 is inserted into the pin insertion hole 8i, the sleeve is inserted from the pin insertion hole 8i. 14 protrudes from the end of the sleeve 14 on the inner side of the vehicle body, and the front male screw portion 15a of the bolt member 15 protrudes. The front male screw portion 15a is screwed to the disc inner peripheral bracket 3a. The elastic bush 13 has an intermediate portion inserted into the pin insertion hole 8i, and boot portions 13a and 13a are formed at both ends protruding from the pin insertion hole 8i.

  In the first slide pin 6, a sleeve 14 is inserted into a pin insertion hole 8 i in a state where the elastic bush 13 is inserted, a bolt member 15 is inserted from the outside of the vehicle body of the sleeve 14, and an end portion of the sleeve 14 inside the vehicle body is inserted. The protruding front male threaded portion 15a is screwed into the female threaded hole 3d of the disk inner peripheral bracket 3a so as to be arranged in parallel with the disk shaft, and the disk inner peripheral bracket 3a is connected via the first slide pin 6. The disk inner periphery side mounting arm 8g is connected.

  The second slide pin 7 has a shaft portion 7 a, a flange portion 7 b, and a base end side male screw portion 7 c, and the base end side male screw portion 7 c is inserted into a female screw hole 8 j formed in the disk outer peripheral side mounting arm 8 h of the caliper body 8. And the shaft portion 7a is inserted into the pin insertion hole 3e formed in the disc outer periphery side bracket 3b, and is arranged in parallel with the disc shaft. The disc outer periphery side bracket 3b is connected to the disc outer periphery side bracket 3b via the second slide pin 7. The disk outer peripheral side mounting arm 8h is connected. A boot 16 is fitted between the opening of the pin insertion hole 8d and the flange portion 7b.

  The friction pads 9, 9 include a lining 9a that is in sliding contact with the disk rotor 5, and a back plate 9b that holds the lining 9a. The hanger pin 12 is inserted and supported like the caliper body 8 so as to be movable in the disk axial direction.

  Since the present embodiment is configured as described above and the brackets 3a and 3b are integrally formed with the bottom case 3, the number of parts can be reduced. Further, the accuracy of mounting the caliper body 8 to the vehicle body can be improved, and the drag of the friction pad 9 with respect to the disc rotor 5 can be reduced.

  Further, since the processing applied to both the brackets 3a and 3b is only the female screw hole 3d and the pin insertion hole 3e, and it is not necessary to attach the parts, the disc brake 1 attaches the caliper body 8 to both the brackets 3a and 3b. Various functional tests can be performed with the slide pins 6 and 7 provided before assembly.

  After the various functional tests, the disc brake 1 is assembled with the piston 10 in the cylinder hole 8d of the caliper body 8 and the elastic bush 13 and the sleeve 14 in the pin insertion hole 8i of the inner peripheral mounting arm 8g. The second slide pin 7 is projected from the side mounting arm 8h, and the second slide pin 7 is inserted into the pin insertion hole 3e of the disc inner periphery side bracket 3a. The friction pads 9 and 9 are assembled to the caliper body 8 while the caliper body 8 is rotated to the outside of the disc rotor 5 with the second slide pin 7 as a support shaft. Next, the caliper body 8 is rotated to the disk rotor 5 side with the second slide pin 7 as a support shaft, and the friction pads 9 and 9 are arranged on both sides of the disk rotor 5 and assembled to the disk inner peripheral mounting arm 8g. The disc brake 1 is assembled to the bottom case 3 by inserting the bolt member 15 through the sleeve 14 and screwing the front end male screw portion 15a into the female screw hole 3d of the disc inner peripheral bracket 3a.

It is II sectional drawing of FIG. It is a front view of a disc brake showing an example of the present invention. It is a top view of a disk brake similarly. It is a front view of the disc brake which similarly shows a vehicle body attachment state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disc brake, 2 ... Front fork, 3 ... Bottom case, 3a ... Disc inner periphery side bracket, 3b ... Disc outer periphery side bracket, 3c ... Main part, 3d ... Female screw hole, 3e ... Pin insertion hole, 4 ... Axle, DESCRIPTION OF SYMBOLS 5 ... Disc rotor, 6 ... 1st slide pin, 7 ... 2nd slide pin, 7a ... Shaft part, 7b ... Flange part, 7c ... Base end side external thread part, 8 ... Caliper body, 8a ... Action part, 8b ... Reaction Part, 8c: Bridge part, 8d ... Cylinder hole, 8e ... Reaction force claw, 8f ... Guide arm, 8g ... Disc inner peripheral mounting arm, 8h ... Disc outer peripheral mounting arm, 8i ... Pin insertion hole, 8j ... Female screw hole 9 ... Friction pad, 9a ... Lining, 9b ... Back plate, 9c ... Hanging piece, 10 ... Piston, 11 ... Hydraulic chamber, 12 ... Hanger pin, 13 ... Elastic bushing, 13a ... Boot part, 14 ... Reeve, 15 ... bolt member, 15a ... front end side male threaded portion, 15b ... shaft portion, 15c ... head 16 ... Boot

Claims (1)

A pair of mounting arms formed on the caliper body of the disc brake are connected to a pair of brackets formed integrally with a bottom case provided at the lower end of the front fork and supporting the front wheel, through a pair of slide pins, and the caliper body In a pin slide type vehicle disc brake that supports the disc in a movable manner in the disc axial direction, a disc inner peripheral side mounting arm is attached to the disc inner peripheral bracket formed on the main body portion of the bottom case via a first slide pin. A disk outer peripheral side mounting arm is connected to a disk outer peripheral side bracket projecting from the bottom case main body to the disk rotor outer peripheral side via a second slide pin, and the first slide pin is connected to the inner peripheral side of the disk. A sleeve movably inserted in a pin insertion hole formed in the mounting arm, and Threaded, pin slide type vehicular disk brake, characterized in that it comprises a bolt member which is screwed to the distal end side male screw portion projecting from the sleeve to the disk inner circumference side bracket.

Images