JPH0673477U - Vehicle brake hanger pin mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] When attaching the hanger pin, the troublesome machining such as internal thread and pin hole are omitted, and the retaining member such as the split pin is not required to improve the economical efficiency. The hanger pin shape is made of a bar material of a predetermined length to prevent misassembly during assembly and to make installation easy and in a short time. [Structure] Four fitting holes 18 are provided facing each other on the outer surfaces of both sides of a ceiling opening 9 facing each other with a disk rotor 2 in between. The ends 13a, 13a of the hanger pin 13 are fitted and suspended in the corners of the vertical holes 18a and the horizontal holes 18b of the fitting holes 18, 18 facing each other. The pad spring 15 is engaged with the fitting holes 18, 18 outside the hanger pins 13, 13. Attach the tip 15c of the restraining piece 15a to the hanger pin 13
End 13a of the back plate 17 and the connecting piece 15b of the back plate 17 in the center of the outer surface of the back plate 17 so that the friction pads 14 and 14 and the hanger pin 13 are repulsed toward the center of the disk. The hanger pins 13, 13 are prevented from coming off by the pad spring 15.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc brake used in various traveling vehicles such as automobiles and motorcycles, and more particularly, to a mounting structure for a hanger pin that suspends a friction pad inside a caliper body.

[0002]

[Prior art]

 As a disc brake of a type in which a pair of friction pads are suspended by a hanger pin, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 4-109233. The caliper body used in this disc brake is an open top type in which a ceiling opening is formed in a bridge portion arranged outside the disc rotor, and a rubbing pad inside the caliper body is inserted and removed through the ceiling opening. The friction pad is suspended on the bridge by a hanger pin that extends in the disc axial direction across the ceiling opening.

[0003]

[Problems to be solved by the device]

 However, in order to prevent the hanger pin from coming off, a messy screw for processing is set in the insertion hole for the hanger pin that is drilled in the bridge part, or a separate pin hole is drilled in the hanger pin, and this pin hole is I had to insert a cotter pin, etc. to prevent it from coming off.

Therefore, the inventor of the present invention focused on a pad spring used to prevent the friction pad from rattling, and by mounting the hanger pin by using the pad spring, the hanger pin mounting structure that solves the above problems. Is intended to provide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention forms a ceiling opening in a bridge portion of a caliper body disposed outside a disc rotor, and installs the ceiling opening in the bridge portion so as to extend in the disc axial direction. For a vehicle in which a pair of friction pads arranged on both sides of the disc rotor are suspended by the hanger pins, and these friction pads are elastically supported by pad springs attached to the bridge portion. In the disc break, fitting holes are provided in both outer surfaces of the ceiling openings facing each other with the disc rotor in between, and both ends of the hanger pin are fitted into the fitting holes, and The pad spring is arranged outside, and the pad spring is pressed against the hanger pin to prevent the hanger pin from coming off.

[0006]

【Example】

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

In the disc brake 1, a caliper bracket 3 fixed to the vehicle body at one side of the disc rotor 2 has a caliper body 4 movable in the disc axial direction via a pair of slide pins 5 and 5. The caliper body 4 is constituted by connecting the action portion side piece 4a and the reaction portion side piece 4b with four connecting bolts 6.

A pad mounting recess 3 a is provided on the caliper bracket 3 so as to open outside in the disk radial direction, and a friction pad 14 described later is accommodated in the pad mounting recess 3 a. Mounting holes 3b, 3b are formed penetratingly on both sides of the pad mounting recess 3a, and each of the above-mentioned slide pins 5 is provided so as to project in the direction opposite to the disc rotor by caulking the base end to the mounting hole 3b. It

The caliper body 4 is composed of an action portion 4 c and a reaction portion 4 d which are arranged on both sides of the disc rotor 2, and a bridge portion 4 e which connects the action portion 4 c and the reaction portion 4 d across the outside of the disc rotor 2. A cylinder hole 7 is provided in the center of the action portion 4c, and guide holes 8, 8 are provided on both sides of the action hole 4c so as to open toward the disk rotor 2 side. A pair of torque receiving protrusions 4f, 4f are integrally formed inside the reaction portion 4d, and a rectangular ceiling opening 9 is formed in the bridge portion 4e.

A cup-shaped piston 10 is housed in each cylinder hole 7 in a liquid-tight and movable manner via a corner seal 11, and a hydraulic chamber 12 is provided between the bottom wall of the piston 10 and the cylinder hole 7. Is defined. The slide pins 5 projecting from the caliper bracket 3 are housed in the respective guide holes 8, and the caliper body 4 is supported on the caliper bracket 3 by the both slide pins 5 and 5 so as to be movable in the disc axial direction. Be touched.

In the bridge portion 4e, two hanger pins 13, 13 are laid across the ceiling opening 9 in the disc axial direction, and a pair of rubbing pads 14 are formed between the hanger pins 13, 13. , 14 are movably suspended in the disc axial direction, and a pad spring 15 attached to the bridge portion 4e on the outer side of the hanger pins 13, 13 springs the friction pads 14, 14 toward the disc center. ing.

The friction pad 14 includes a lining 16 and a back plate 17. The upper hanging pieces 17 a, 17 a of the back plate 17 are provided with pin holes 17 b, respectively, and the hanger pin 13 described above is formed. Is inserted into this pin hole 17b. One friction pad 14 is accommodated in the pad mounting recess 3a between the disc rotor 2 and the piston 10, and the other friction pad 14 is interposed between the disc rotor 2 and the reaction portion 4d. It is housed between the torque receiving protrusions 4f, 4f of 4d. Further, the ceiling opening 9 of the bridge portion 4e is formed to be larger than the friction pads 14 and 14 arranged on both sides of the disk rotor 2 so as to face each other, and these friction pads 14 and 14 perform maintenance and pad replacement. In this case, it is inserted and removed through this ceiling opening 9.

In the bridge portion 4e, four fitting holes 18 are provided so as to oppose each other on the outer surfaces of both sides of the ceiling opening portion 9 that faces each other with the disc rotor 2 interposed therebetween. Each fitting hole 18 is formed in an L shape in which a horizontal hole 18b in the disk circumferential direction is connected to the inner end of a vertical hole 18a in the disk radial direction. , 18 have lateral holes 18b, 18b extending outwardly from each other, and have L-shaped back-to-back symmetrical shapes.

The vertical holes 18a are opened both on the outer surface of the bridge portion 4e and on the inner side of the ceiling opening portion 9, and the horizontal holes 18b are opened only on the inner side of the ceiling opening portion 9. A jaw piece 4g protruding in the direction of the vertical hole 18a is formed on the outer side of 18b. These fitting holes 18 are of a two-piece type in which the caliper body 4 of the present embodiment is composed of the action portion side piece 4a and the reaction portion side piece 4b, so that when the respective pieces 4a, 4b are formed by casting. Is integrally formed with.

The hanger pins 13, 13 are obtained by cutting a small-diameter rod material into a predetermined length, and both end portions 13a, 13a are formed by connecting the vertical holes 18a and the horizontal holes 18b of the fitting holes 18, 18 facing each other. The disc rotor 2 is fitted in the groove portion and is suspended while straddling the outer side of the disc rotor 2 in the disc axial direction. The pad springs 15 described above are engaged with the outer sides of the hanger pins 13 and 13, and the hanger pins 13 and 13 are prevented from coming off by the pad springs 15.

The pad spring 15 is composed of a pair of holding pieces 15a, 15a and a connecting piece 15b connecting the central portions of the holding pieces 15a, 15a. The restraining pieces 15a, 15a are formed by bending the wings from both sides of the connecting pieces 15b, and the connecting piece 15b has a shape in which the holding pieces 15a, 15a are dropped in parallel to one side. ing. This pad spring 15 inserts the tip 15c of each restraining piece 15a into the lateral hole 18b from the vertical hole 18a of the fitting hole 18 to lock the tip 15c inside the jaw piece 4g and to connect the connecting piece 15b. Is accommodated and attached in the ceiling opening 9.

By this attachment, the tip 15c of the restraining piece 15a is brought into pressure contact with the end portion 13a of the hanger pin 13 and the connecting piece 15b is brought into pressure contact with the central portion of the outer surface of the back plate 17, respectively, and the friction pads 14 and 14 and the hanger. The elastic force of the pad spring 15 acts on the pin 13 toward the center of the disc. As a result, the friction pads 14 and 14 are prevented from rattling when the vehicle is running, and are prevented from being lifted toward the outside of the disc during braking, and the hanger pins 13 and 13 are attached to the pad spring 15. Therefore, the fitting hole 18 is prevented from coming off.

In the present embodiment, as described above, the hanger pin 13 hung over the fitting holes 18, 18 is prevented from coming off by attaching the pad spring 15, so that the hanger pin 13 is prevented from coming off. There is no need to form a troublesome internal thread for processing, and there is no need for a dedicated retaining member such as a split pin.

Further, the hanger pin 13 can be a bar material cut into a predetermined length, and it is not necessary to process a male screw for screwing or a pin hole for a split pin. Moreover, since the hanger pin 13 has no direction for mounting, there is no risk of the operator getting lost or wrongly assembled, and the hanger pin 13 can be easily mounted in the fitting hole 18 in a short time. Further, in this embodiment, since the fitting hole 18 is also used for mounting the pad spring 15, it is not necessary to form a dedicated mounting portion for the pad spring 15 on the bridge portion 4e.

In the present invention, since the elastic force of the pad spring acts on the friction pad via the hanger pin, the pad spring does not necessarily have to be directly applied to the friction pad. In addition, the pad spring may be attached by providing a dedicated pad spring attachment portion on the bridge portion. In this case, the fitting hole may be a simple recessed hole for accommodating the hanger pin. Further, the fitting hole may be as-cast by casting, or may be cut after casting.

[0021]

[Effect of device]

 Since the present invention is configured as described above, when mounting the hanger pin, it is possible to omit a troublesome female screw for processing and to omit a dedicated retaining member such as a split pin. Further, the hanger pin can be a simple rod material cut into a predetermined length, and the hanger pin also does not require a male screw for screwing or a pin hole for a split pin. Moreover, since the hanger pin has no directivity in mounting, there is no risk of mis-assembly, and mounting in the fitting hole can be performed easily in a short time, resulting in excellent economic efficiency and mountability.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I of FIG.

FIG. 2 is a plan view of a disc brake showing an embodiment of the present invention.

FIG. 3 is a front view of a disc brake showing an embodiment of the present invention.

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

[Explanation of Codes] 1 ... Disc brake 2 ... Disc rotor 3 ... Caliper bracket 4 ... Caliper body 4a ... Working portion side piece 4b ... Reaction portion side piece 4c ... Working portion 4d ... Reaction portion 4e ... Bridge portion 4g ... Fitting hole Jaw piece covering the outside of the lateral hole 18b of 18 9 ... Ceiling opening 13 ... Hanger pin 13a ... End of hanger pin 13 14 ... Friction pad 15 ... Pad spring 15a ... Pad spring 15 restraining piece 15b ... Pad spring 15 Connecting piece 15c ... Tip of restraining piece 15a 16 ... Lining 17 ... Back plate 18 ... Fitting hole 18a ... Vertical hole of fitting hole 18b ... Horizontal hole of fitting hole 18

Claims (1)

[Scope of utility model registration request] 1. A ceiling opening is formed in a bridge portion of a caliper body arranged outside a disk rotor, and a hanger pin is laid across the ceiling opening in the bridge portion in the disk axial direction. A pair of friction pads disposed on both sides of the disc rotor are suspended, and the disc rotor is sandwiched in a vehicle disc brake in which these friction pads are elastically held by pad springs attached to the bridge portion. At the outer surface of both sides of the ceiling opening facing each other, a fitting hole is provided as a recess, and both ends of the hanger pin are fitted into the fitting hole, and the pad spring is arranged outside the hanger pin. A hanger pin mounting structure for a vehicle disc brake, wherein the pad spring is pressed against the hanger pin to prevent the hanger pin from being pulled out.