JPS62101926A - Disc brake for drum-shaped rotor - Google Patents

Abstract

PURPOSE:To lighten a disc brake and facilitate the assembling work thereof, by simplifying the structure of a slide supporting device, which is used to support a caliper slidably in the radial direction of the rotor. CONSTITUTION:A slide supporting device 5 which supports a caliper 3, is set along the circumferential direction of a rotor 1 as a pair, apart from each other..Then, sleeve pins 5b are fastened between the heads of bolts 5a and the concavities 2c of adapters 2, respectively, by the bolts 5a which are screwed in screw holes 2b of the adapters 2. On the outer circumferences of these sleeve pins 5b, the openings 3d of bosses 3c, which project from the side surfaces of the caliper 3 in both directions along the circumference of the rotor 1, are slidably fitted. In this way, heavy parts such as intermediate supports, are not necessary, as the slide supporting device which is used to support the caliper, is directly connected to a car fixed part (a fixedly supporting body), and consequently, the structure of the slide supporting device is simplified, and the assembling work an be carried out easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a disc brake for a drum-shaped rotor.

[Background of the invention]

A disc brake applied to a rotor having a drum part extending from the rotating peripheral part in the direction of the generatrix, especially the inner part of the drum part.
In a carry/floating type disc brake that has a mechanism for sliding a caliper that presses a friction pad against the outer circumferential surface in the radial direction of the drum part, the sliding mechanism for the carry/arm sliding is used. Generally, the structural part for assembling the carrier/mother to the vehicle fixing part through the carrier/mother is installed inside the rotor's drum section by passing through the carrier/mother, which tends to complicate the structure and increase the weight. Furthermore, there were various points that needed to be improved, such as the fact that the workability when installing the brake device on a vehicle was complicated.

[Purpose of the invention]

The present invention has been made from this point of view, and its purpose is to support a caliper slidably in the radial direction of the rotor in a carrier/floating type disc brake applied to a rotor having a drum portion. It is an object of the present invention to provide a disc brake in which the structure of the sliding support device and the vehicle fixed support portion supporting the sliding support device is simplified, the weight is reduced, and the assembly is easier.

Another object of the present invention is to provide a carrier for disc brakes.
Sufficiently prevents variations between products regarding the slipperiness of the mother,
The objective is to provide a disc brake that makes it possible to provide a highly reliable device.

[Summary of the invention]

The disc brake for a drum-shaped rotor according to the present invention, which has been made to achieve the above object, is characterized by a drum-shaped rotor having a drum extending from the rotating edge in the generatrix direction, and It is planted on a fixed support located on the inner side of the shaped rotor, and the vicinity of the protruding end of the drum part is cut out in the radial direction of the rotor, and is arranged with # open in the circumferential direction of the A pair of parallel pin supports and a sliding support device whose openings are slidably fitted to sleeve pins that are fixed with radial play to each of the pair of bottle supports are used to straddle the drum section and extend the rotor in the radial direction. slidably supported;
and a carrier shaft having a cylinder device for pressing /f7 on the inside of the drum part and a reaction claw part for pressing /4' on the outside of the drum part, which are arranged in a pair opposite to each other on the inside and outside of the drum part, a pair of friction pads that are pressed against the drum part by the carry arm, and the pair of friction pads have wing parts on both sides in the circumferential direction of the rotor that engage concave and convex fitting with both sides in the circumferential direction of the rotor of the carry flat, respectively. Therefore, the structure is such that it is supported so that it can receive brake torque pressure.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on embodiments shown in the drawings.

FIG. 1 shows a side view of a disc brake according to the present invention assembled into a vehicle, as viewed from inside the vehicle.

In the figure, reference numeral 1 denotes a rotor having an r-ram portion 1a, and the rotor is provided with a flange-shaped drum portion 1a extending in the generatrix direction on the outer periphery of a main body that rotates together with the wheels.

This is an adapter that is fixed to a fixed support (not shown) of a two-wheeled vehicle with a fastening bolt (not shown).
m indicates the screw hole of the fastening gel. This adapter 2 is arranged outside the hollow part formed by the drum part of the rotor. The screw hole 2
a e 2 a is in the rotor axial direction. Note that the adapter 2 of this example incorporates a member to which the gel (pin support) of the sliding support device, which is missing, is fixed. It may be omitted if it is directly fixed.

Reference numeral 3 denotes a carrier/mother disposed so as to straddle the extending end of the drum portion of the rotor, and is slidably supported in the rotor radial direction by the adapter 2 via a pair of missing sliding supports +t5.5. The carry f3Fi has an inner leg 3a and an outer leg 3b sandwiching the drum part 2a, and the inner leg 3aK has a built-in cylinder device 4 having a pressing piston 4a as shown in FIG. As shown in FIG. 5, a reaction claw portion is formed in the form of two parts. Reference numeral 4b is an oil chamber of the cylinder device 4, and the piston 4a is moved forward toward the f-ram section 1a by transmission of the brake hydraulic pressure, thereby bringing the inner pad into pressure contact with the inner surface of the drum section 1a.

Five sliding support devices are arranged in a pair spaced apart in the circumferential direction of the rotor, and are screwed into screw holes 2b of the adapter 2. 2e, 2c between sleeve pins 5b, 5b
are fastened and fixed, and the sleeve pins 5b are made to protrude from the sides of the carrier 3 to both sides in the rotor circumferential direction from the outer periphery of the sleeve pins 5b. It has a structure in which the openings 3d and 3d of the space portions 3c+3c are slid together. The inner diameter of the sleeve pin 5b is set to be slightly larger than the outer diameter of the gel 5a, and the pitch error of the screw holes 2b of the adapter 2 can be absorbed by its loose fit. Also, in this example, sleeve pin 5b and carino? A comb ring 5c is attached near the center of the sliding surface of the opening 3d of the yf'' space, thereby suppressing wear during vibrations that is affected by the presence of the sliding gap.

5d and 5e are dustproof boots that seal the sliding surfaces from the outside.

Next, the structure of the friction pad 6.7 and its support with the carrier/4' will be explained.

The inner parallax r6 has a structure in which a lining 6a having a convex surface suitable for press contact with the inner surface of the drum portion of the rotor is backed and fixed with a back plate 6b made of sheet metal,
This back plate 6b is a rail part 3@ in the rotor radial direction formed on both sides of the carrier/mother at both wing parts in the rotor circumferential direction,
It is provided with hooks 6c, 6c that engage with the hook 3e. To further explain this shape with reference to FIGS. 2, 4, and 5, on both sides of the carino arm 2 in the rotor circumferential direction, there is a A concave portion extending in the direction (to be precise, in a direction coinciding with the axial direction of the sleeve pin 5b of the sliding support device) is formed as the rail portion 3e*3e, and with respect to the rail portions 3s and 3a, the inner four portions r6 Back plate hook 6e
, 6e are engaged from both sides in a hugging manner, thereby slidably supporting the inner side/4'p 5 in the rotor radial direction. In addition, 8 is this hanging claw 6c and carry/4'
The base clip 1 interposed between the retaining surfaces of the rail portion 3e is made of, for example, a temporary spring material to prevent the two from coming apart, and also functions as a stop spring. ing. In addition, the distance between the opposing inner sides of the extending portions of the inner protrusion 6 to the hooks 6e and 6e is set to match the width of both sides 3f and 3f in the circumferential direction of the rotor of the gear +7i4. , so that the torque generated during auxiliary braking is transmitted through these engaging portions.

It has a structure in which a lining 7a with a concave surface suitable for being pressed into contact with the outer surface of the drum and drum portions of the rotor is lined and fixed with a back plate 7b made of sheet metal. The back plate 7b has protrusions 3g, 3g formed extending in the same direction from both sides of the rotor circumferential direction of the reaction claws 3b, 3b of the carriers in both wing parts in the rotor circumferential direction, respectively. The hook 7e is held in place by holding the hook in the extending direction).

7c, and the pad clip 9 attached to the approximately central portion of the rear surface of the back plate 7 is impacted on the rear surface and tip surface of the carrying/reaction force portions 3b, 3b. , has become firmly supported due to the sudden attack. In addition, the distance between the pair of hooking claws 7e and 7c on both wings of the outer base plate is approximately the same as the width of both sides 3h and 3h of the caliper reaction claws 3b and 3b. The torque generated during braking is transmitted through these engaging portions.

Note that 10 is a mother tsudokridde which has the same function as 8.

In disc brakes with the above structure,
The disc brake assembly (including the adapter 2 in this example) can be assembled to the vehicle by simply fixing the adapter 2 to the vehicle fixed part using the fastening gel. Because it is easy to maintain high precision in pitch and parallelism,
Stable gear IJ /4 from a new pair of friction/9-r to low wear condition? This has the advantage of ensuring good sliding properties.

Note that the present invention is not limited to the embodiment shown in the drawings, and for example, as described above, the adapter may be omitted and the gel of the sliding support device may be directly screwed onto a vehicle fixed part such as an axle. It may be fixed.

〔Effect of the invention〕

According to the present invention, various effects can be obtained,
Its usefulness is extremely great.

(1) Since the sliding support device for supporting the caliper is directly connected to the fixed part of the vehicle (fixed support), there are no heavy parts such as intermediate supports, and the structure is simple and easy to assemble. becomes.

(2) The positional accuracy of the pair of sliding support devices can be obtained sufficiently high by controlling the machining accuracy of the flat seat and fitting hole of the fixed support that the sleeve pin engages with, and the slide resistance of the carrier/IP Especially in disc brakes that are applied to drum-shaped rotors, the sliding support device is always on the effective diameter near the drum part of the rotor. Fluctuations in resistance can be effectively prevented.

(3) Since the inner and outer poles are supported by the sides of the caliper p4 by their shells on both sides in the circumferential direction of the rotor, it is easy to handle the disc brake assembly before it is installed on the vehicle.

(4) The above-mentioned structure allows the area of the backing metal of the friction and base to be sufficiently widened, which is advantageous in terms of the strength of the pad, and also makes it possible to impart sufficient rigidity to the reaction pawl of the carrier and base.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a side view of a disc brake seen from inside the vehicle, and Fig. 2 is the same! An explanatory diagram showing the friction, position and posture of the 4-piece in Figure 1, Figure 3 is a view from arrow C in Figure 1, and Figure iVg4 is Figure 1 C.
View from the arrow, Figure 5 is the view from the arrow C in Figure 1, Figure 6 is the view from Figure 1 D-
Di sectional view and FIG. 7 respectively show the bottom view of the carrier. 1: Rotor 1a: Drum part 2: Adapter 3: Carino and 3a: Inner leg
3b: Outside leg 3c: 1t? Part 3e
:Rail part 3g:Protrusion 4Niji cylinder device 5:Sliding support device 5a:Female seat 5bNi sleeve pin 5c:Rubber ring 6:Inner arm
6c: Kakezume 7: Outer part)' 7e: Kakezume 8.9.10: Nod clip agent Teru Taniyama Y/J Honta Ko Masayuki Hirakishida Shinbe Koji Figure 1 Figure 2 Figure 7 Figure ■) School

Claims (1)

[Claims] A drum-shaped rotor having a drum part extending in the generatrix direction from the rotating edge, and a fixed support located on the radially inner side of the drum-shaped rotor, so that the vicinity of the extending tip of the drum part is approximately connected to the rotor diameter. The opening slides into a pair of parallel pin supports that are spaced apart from each other in the circumferential direction of the rotor, and a sleeve pin that is fixed with radial play to each of the pair of pin supports. a caliper that is slidably supported in the rotor radial direction across the drum section by a sliding support device, and has a pad pressing cylinder device inside the drum section and a pad pressing reaction claw section outside the drum section; A pair of friction pads are disposed in a pair on the inside and outside of the drum part and are pressed against the drum part by the caliper. A disc brake having a drum-shaped rotor is characterized in that it is supported in a manner capable of receiving brake torque pressure by engaging concave and convex portions with both sides in the circumferential direction.