CN1064116C - Dish brake - Google Patents

Abstract

The present invention aims to provide a disc brake using a single hitch pin, which can reduce the number of parts and assembly work, prevent friction pads from wobbling, and reduce the load on the hitch pin. The friction washer 32 ₁ is supported by a single hook pin 38, and the turn-in side spring portion 40b that pushes the friction washer 32 ₁ at the turn-in side and the turn-out side of the disc rotor (24) is provided on the liner spring 40 And the turning-out side spring part 40c, the torque produced on the friction pad 321 by the turning-out side spring part 40c is smaller than the torque produced on the friction pad ₃₂₁ by the turning-in side spring part _40b , in the caliper 21 or The component fixedly connected with the caliper 21 is provided with an abutting portion 43 that receives the friction pad ₃₂₁ on the rotating out side of the disc rotor 24 .

Description

Disc gate

The invention relates to a disc gate, which has a disc rotor, a caliper clamping the outer circumference of the disc rotor, a pair of friction pads respectively arranged on both sides of the disc rotor and between the caliper, and a The axis of rotation is parallel to the axis and is provided on the caliper to support the above-mentioned two friction pads. The hook pin pushes the two friction pads to the rotation center of the disc rotor and is provided on the two friction pads and the caliper. spacer springs between.

Disc gates in the prior art, such as the one disclosed in Japanese Patent Publication No. 63-146234, are known to the public.

In the above-mentioned known disc gate, the friction pads on both sides of the disc rotor are supported by a pair of hook pins arranged on the caliper, and the elastic force of the pad spring acts on the two friction pads at the center between the two hook pins. Chip. From the perspective of reducing the number of parts and assembly workload, it is best to use a hook pin to support the two friction pads. At this time, it is necessary to prevent the sloshing of the two friction pads and avoid the load on the hitch pin due to the braking torque. get bigger.

The present invention is made in view of the above-mentioned problems, and its purpose is to provide a disc-shaped locking pin that uses a single hitch pin in order to reduce the number of parts and assembly workload, prevent the friction pad from sloshing, and reduce the load on the hitch pin. brake.

In order to achieve the above object, the disc brake of the present invention has a disc rotor, a caliper clamping the outer periphery of the disc rotor, a pair of friction pads respectively disposed between the two sides of the disc rotor and the caliper, and the shaft and the disc rotor. A hook pin that is parallel to the rotation axis and arranged on the caliper for supporting the above two friction pads, and a pad between the two friction pads and the caliper that pushes the two friction pads toward the rotation center of the disc rotor The spring is characterized in that a single hook pin supporting the outer peripheries of the two friction pads is set on the caliper, and a turn-in side spring and a turn-out side spring are arranged on the liner spring, and the turn-in side spring is on the turn-in side of the disc rotor Push one side of the circumferential direction of the two friction pads toward the rotation center of the disc rotor, and the spring on the rotating side pushes the other side of the circumferential direction of the two friction pads toward the rotation center of the disc rotor on the rotating side of the disc rotor. Push and set so that the torque around the hook pin generated by the spring part on the rotating side on the two friction pads is smaller than the torque around the hook pin generated on the two friction pads by the spring part on the rotating side. Or, on the component fixedly connected with the caliper, there is provided a pad abutting portion for receiving two friction pads on the rotating out side of the disc rotor.

Since a single hitch pin is used to support a pair of friction pads, the number of parts and assembly work can be reduced. Because the turning-in side spring and the turning-out side spring of the liner spring produce unequal torque around the hook pin on the two friction pads, so that a force acts on the two friction pads, and the force makes the inner peripheral side of the friction pad Turn on the spin-out side of the disc rotor. On the rotating-out side of the disc rotor, the two friction pads are received by the pad abutment portion, so that the friction pads are positioned and the excessive load caused by the braking torque can be prevented from acting on the hitch pin.

Fig. 1 is a partially cutaway side view of a disc brake mounted on a front wheel of a motorcycle.

Fig. 2 is an enlarged cross-sectional view of line 2-2 in Fig. 1 .

Fig. 3 is an enlarged cross-sectional view along line 3-3 of Fig. 1 .

Fig. 4 is an enlarged sectional view of line 4-4 in Fig. 2 .

Fig. 5 is an enlarged sectional view of line 5-5 in Fig. 2 .

Fig. 6 is a longitudinal sectional view of a spacer spring.

FIG. 7 is a view along arrow 7 in FIG. 6 .

FIG. 8 is a view along arrow 8 in FIG. 6 .

Figure 9 is a side view of the caliper stay.

FIG. 10 is an enlarged view of portion "10" in FIG. 1 .

Fig. 11 is a view taken along line 11-11 in Fig. 1 .

In the figure, 20～caliper support plate as the connecting part of the caliper, 21～caliper, 24～disc rotor, 32 ₁ , 32 ₂ ～friction pads, 38～hook pin, 40～pad spring, 40b～turn-in side Spring part, 40c ~ the spring part on the swing-out side, 43, 45 ~ the gasket abutting part, B ₀ ~ the disk gate.

An embodiment in which the present invention is applied to a front wheel brake of a two-wheeled motor vehicle will be described below with reference to the accompanying drawings.

1 to 11 show an embodiment of the present invention.

Referring first to Fig. 1, for example, on the front fork 15 of a scooter-type motorcycle, a brace 16 is integrally formed at its lower end, and a brace 17 is welded and fixed at its lower rear side. The caliper strut plate 20 of the caliper 21 supporting the disc brake _B0 is fastened to the axle 18 of the front wheel (not shown) and connected to a strut plate 16, and is fixedly connected to the other strut plate 17 by a bolt 19 at the same time.

Referring again to FIGS. 2 to 5 , on the inner side of the caliper brace 20 along the axial direction of the wheel shaft 18 , the disc rotor 24 is fixed on the front wheel. The caliper 21 has a caliper body 22 , and the main part of the caliper body 22 is disposed on the outer surface of the disc rotor 24 facing each other. The caliper body 22 is supported on the caliper support plate 20 and can move in a direction parallel to the wheel shaft 18 . That is, on the caliper body 22, a bottomed cylindrical rubber guide member 25 that opens toward the caliper stay 20 side is fixedly supported, and a bottomed guide hole that opens toward the caliper stay 20 side is pierced on the pliers body 22. 26 . The caliper stay 20 is provided with a pin bolt 27 slidably fitted in the guide member 25 and a pin bolt 28 slidably fitted in the guide hole 26 . A dustproof sheath 29 is provided between the opening end of the guide member 25 and the pin bolt 27 , and a dustproof sheath 30 is provided between the opening end of the guide hole 26 and the pin bolt 28 .

On the caliper body 22, along the radial direction of the disc rotor 24 and at a position more outward than its outer peripheral edge, a connecting arm portion 22a extending toward the axially inner side of the wheel shaft 18 is integrally provided. A pair of connecting bolts 31 and 31 is used to fix the clamp arm 23 that clamps the outer peripheral portion of the disc rotor 24 in the space between the disc rotor 24 and the clamp body 22 on the front end portion of the rotor 22a.

Friction pads 32 ₁ are arranged between the outer peripheral surface of the disk rotor 24 and the clamp body 22 , and friction pads 32 ₂ are arranged between the outer peripheral surface of the disk rotor 24 and the jaw 23 . The two friction pads 32 ₁ , 32 ₂ are equipped with an inner plate 33 , a turning-in side lining 34 and a turning-out side lining 35 respectively. Turning into the side lining 34 is to turn into the side of the disk rotor 24 that rotates on the rotation direction 36 shown in Fig. 4 and Fig. 5 arrow, is attached on the inner plate 33 opposite to the disk rotor 24; The lining 35 is attached to the inner plate 33 on the side where the disk rotor 24 turns out, opposite the disk rotor 24 . Considering the extent to which the friction pads 32 ₁ , 32 ₂ are pressed against the disc rotor 24 during braking, the turning-in side of the disc rotor 24 is stronger than the turning-out side, in order to make the surface pressure of the two linings 34, 35 Basically equal, prevent the eccentric wear of lining 34,35, so the area that turns into side lining 34 is set bigger than the area that turns over side lining 35.

As shown in Figures 4 and 5, on the turning-in side and the turning-out side of the disc rotor 24, semicircular protrusions 33a, 33b protruding toward the two linings 33, 34 are provided on the back plate 33, A recess 34a for partially fitting the protrusion 33a is provided at the turning-in side end of the entering side lining 34, and a recess 35a for fitting the protrusion 33b is provided at the turning-out side end of the turning-out side lining 35. Like this, when two lining sheets 34,35 are attached to the inner plate 33, just can correctly make two lining sheets 34,35 position. In addition, in order to display the wear amount of the two linings 34, 35, in the past, after the two linings 34, 35 were pasted on the inner plate 33, grooves were processed on the two linings 34, 35 for display; In the present invention, the above-mentioned fitting structure of the protrusions 33a, 33b and the recesses 34a, 35a serves as an indicator for displaying the wear of the two linings 34, 35, and there is no need to process grooves as described above, so the workload can be reduced. .

On the outer peripheral portion of the inner plate 33 of the two friction pads 32 ₁ , 32 ₂ , at approximately the central position along its circumferential direction, a support portion 33c protruding outward is respectively provided. Bearing hole 37 . A single hook pin 38 is provided between the clamp body 22 and the clamp wrist 23 , and the hook pin 38 passes through the supporting holes 37 of the two friction pads 32 ₁ , 32 ₂ . That is, the outer peripheral portions of both friction pads 32 ₁ , 32 ₂ are supported by a single hook pin 38 provided on the caliper 21 at substantially the center portion along the circumferential direction of the disk rotor 24 .

6 to 8 together, between the two friction pads 32 ₁ , 32 ₂ and the connecting arm 22a of the caliper 21, a pad spring 40 is provided, and the pad spring 40 pushes the two friction pads 32 ₁ , 32 ₂ Push toward the direction of the rotation center of the disc rotor 24, that is, the wheel shaft 18 side.

The pad spring 40 has a support plate 40a abutted against the connecting arm portion 22a of the caliper 21, a swing-in side spring portion 40b connected to one side of the support plate 40a, and a swing-out side spring portion connected to the other side of the support portion 40a. side spring portion 40c. The turning-in side spring part 40b pushes the circumferential side of the two friction pads 32 ₁ , 32 ₂ towards the rotation center direction of the disc rotor 24 on the turning-in side of the disc rotor 24; The rotating side of the disk-shaped rotor pushes the other circumferential side of the two friction pads 32 ₁ , 32 ₂ toward the rotation center of the disk-shaped rotor 24 . The turning-in side spring portion 40b and the turning-out side spring portion 40c abut against the outer peripheral sides of the friction pads 32 ₁ , 32 ₂ and sandwich the support portion 33c. Furthermore, openings 41 and 42 are provided on the turning-in side spring portion 40b and the turning-out side spring portion 40c, and the opening area of the opening 42 is larger than that of the opening 41 . In this way, the spring load of the swing-out side spring portion 40c can be set to be smaller than the spring load of the swing-in side spring portion 40b.

In this way, since the spring force of the liner spring 40 acting on the two friction pads 32 ₁ , 32 ₂ at the turning-in side of the disc rotor 24 is greater than the spring force acting on the two friction pads 32 1 , 32 ₂ at the turning-out side of the disc rotor 24 The spring force of 32 ₂ is large, so the torque 38 around the hook pin generated on the two friction pads 32 ₁ and 32 ₂ is not equal, so that the two friction pads 32 ₁ and 32 ₂ can go around the hook pin in a clockwise direction as shown in Figure 5 38 rotates. In addition, when the two-wheeled motor vehicle is moving forward, the two friction pads 32 ₁ and 32 ₂ rotate around the hook pin 38 in the clockwise direction as shown in FIG. . A shim receiving portion 43 and a shim receiving portion 44 are provided on the jaw 23 that is a constituent element of the caliper 21 . The gasket receiving part 43 is to receive a friction pad 321 on the rotating side of the disc rotor ₂₄ , which is close to the inner part of the radial direction, and the gasket receiving part 44 is to receive the friction pad 32 on the rotating side of the disc rotor 24. ₁ , the friction pad ₃₂₁ is positioned between the pad receiving portions 44, 43 at the portion near the inner side in the radial direction. As shown in FIG. 9 , a washer receiving portion 45 and a washer receiving portion 46 are provided on the caliper stay 20 as a member fixedly connected to the caliper 21 . The gasket receiving part 45 is to receive the inner part of another friction pad 322 in the radial direction on the rotating out side of the disc rotor ₂₄ , and the gasket receiving part 46 is to receive the friction pad on the rotating in side of the disc rotor 24. The friction pad 32 ₂ is positioned between the pad receiving portions 46 and 45 at the portion near the inner side in the radial direction of the pad 32 ₂ .

On the caliper body 22, there is a bottomed cylinder hole 47 corresponding to a friction pad _321. The piston 49 is slidably fitted in the cylinder hole 47, and an oil is formed between the piston 49 and the closed end of the cylinder hole 47. Pressure chamber 48. The piston 49 faces the inner plate of the friction pad ₃₂₁ and can abut against it.

Referring to FIG. 1 , a master cylinder 50 is integrally provided on the body 22 of the tongs. A piston 51 is slidably fitted in the master cylinder 50 , and the front end of the piston 51 faces a hydraulic pressure generating chamber 52 communicating with the hydraulic pressure chamber 48 . Inside the oil pressure generating chamber 52, a return spring 53 that pushes the piston 51 backward is provided.

On the clamp body 22, an auxiliary fuel tank 54 is arranged above the master cylinder, as shown in FIG. An annular fitting groove 57 is provided on the inner surface of the upper end of the sub tank 54 . The upper end opening of the sub-tank 54 is closed by a synthetic resin cap 58 having an annular fitting claw 58a fitted into the fitting groove 57 in a resilient manner. Therefore, brake fluid that does not need to be replaced even if it is used for a long period of time can be stored in the sub tank 54 . Since the cover 58 does not need to be opened and closed frequently, there is no problem in installing the cover 58 on the sub-tank 54 with the structure that is difficult to open as described above. Compared with the opening and closing structure using threads or the like, the number of parts and assembly work can be reduced. quantity.

Referring to FIG. 11 together, on the caliper body 22 , a fulcrum 61 whose axis is parallel to the wheel shaft 18 is fixed, and the push rod 62 and the brake arm 63 are rotatably supported on the fulcrum 61 .

The lower end of the push rod 62 faces the rear end of the piston 51 slidably fitted in the master cylinder 50 . Between the clamp body 22 and the push rod 62, a return spring 64 is arranged, and the return spring 64 pushes the lower end of the push rod 62 away from the rear end of the piston 51, that is to say, pushes the push rod 62 toward the direction shown in Fig. 1 Push in the counterclockwise direction. The limit of the push rod 62 rotating counterclockwise in FIG. 1 is when the upper end of the push rod 62 abuts against the auxiliary fuel tank 54 .

On the upper end of the push rod 62 , the base end portion of the adjusting bolt 65 is connected, and the adjusting bolt 65 can rotate about an axis parallel to the supporting shaft 61 . The upper end of the brake arm 63 supports a connecting shaft 66 whose axis is parallel to the fulcrum 61, and which is rotatable around its axis. The adjustment bolt 65 is movable along its axis and penetrates through the connecting shaft 66 . On the part protruding from the connecting shaft 66 of the adjusting bolt 65, the adjusting nut 67 abutting against the connecting shaft 66 is screwed, and between the base end of the adjusting bolt 65 and the connecting shaft 66, an adjusting spring 68 is compressed. .

According to the above structure, when the brake arm 63 rotates clockwise in FIG. 1 , the push rod 62 also rotates clockwise in FIG. Disc brake B _D just makes braking action.

With reference to Fig. 1, on the brake lever that is arranged on the steering handle not shown in the figure, the brake cable 71 that is made up of outer sleeve 69 and inner rope 70 is connected, and the lower end of outer sleeve 69 is fixedly connected with the caliper. On the supporting part 72 that body 22 lower part is integrated. The inner rope 70 stretched out from the lower end of the outer sleeve 69 and covered by the dust jacket is connected with the lower end of the brake arm 63 .

In order to protect the brake cable 71 and the brake arm 63 from being damaged by splashes such as small stones, on the support plate 16 at the lower end of the front fork 15, a guard plate 74 extending downward is welded and fixed, and the guard plate 74 can increase the disc shape. Action reliability of gate B _D.

Next, the effect of this embodiment will be described. Since the outer peripheral portions of the two friction pads 32 ₁ , 32 ₂ are supported by a single hook pin 38 at approximately the central portion along the circumferential direction of the disc rotor 24, the number of parts and the number of components can be reduced. The amount of work involved in assembling disc brakes.

The pad spring 40 is provided with a swivel-in side spring portion 40b and a swivel-out side spring portion 40c. The turning-in side spring part 40b pushes one side of the circumferential direction of the two friction pads 32 ₁ , 32 ₂ towards the rotation center direction of the disc rotor 24 at the turning-in side of the disc rotor 24, and the turning-out side spring part 40b is on the disc rotor 24. The rotating side of the disk-shaped rotor pushes the other side of the friction pads 32 ₁ , 32 ₂ in the circumferential direction toward the rotation center of the disc rotor 24, and sets the spring load of the rotating-out side spring portion 40c to be higher than that of the rotating-in side. The spring load of the side spring portion 40b is small. Therefore, by the two spring parts 40b, 40c, the torque around the hook pin generated on the two friction pads 32 ₁ , 32 ₂ is not equal, so that the two friction pads 32 ₁ , 32 ₂ face the disc rotor toward its inner circumference. 24 to rotate in the direction that the swing out side moves. Moreover, since the clamping wrist 23 of the caliper 21 and the caliper support plate 20 are provided with the pad abutting parts 43, 45 that bear the two friction pads 32 ₁ , 32 ₂ on the rotating side of the disc rotor 24, it can avoid The shaking of the two spacers 32 ₁ , 32 ₂ positions the two spacers 32 ₁ , 32 ₂ , and at the same time prevents the excessive load generated by the braking torque from acting on the single hook pin.

The embodiments of the present invention have been described above in detail, but the present invention is not limited to the above embodiments, and various design changes can be made to the present invention within the scope described in the claims.

For example, the pad abutting portion receiving the two friction pads 32 ₁ , 32 ₂ on the rotating out side of the disk rotor 24 may be provided only on the caliper 21 . In addition, the spring loads of the turning-in side spring portion 40b and the turning-out side spring portion 40c of the pad spring 40 are set to be equal, and the hook pin 38 supporting the two friction pads 32 ₁ , 32 ₂ is set at A torque difference can also be generated at a position where the central portion of the shaped rotor 24 in the circumferential direction deviates from the position on the rotation-out side. In addition, the present invention is also applicable to rear wheel disc brakes of motorcycles, and can be widely applied to disc brakes for vehicles.

According to the above-mentioned present invention, a single hook pin supporting the outer peripheral parts of the two friction pads is provided on the caliper; a turn-in side spring part and a turn-out side spring part are provided on the liner spring, and the turn-in side spring part is in the shape of a disk. The turning-in side of the rotor pushes one side of the circumferential direction of the two friction pads toward the rotation center of the disc rotor, and the spring part of the turning-out side pushes the other side of the circumferential direction of the two friction pads on the turning-out side of the disc rotor. Pushing towards the rotation center of the disc rotor, the torque of the hook pin generated by the spring part on the rotating side on the two friction pads is set to be greater than the torque generated by the spring part on the rotating side on the two friction pads. The pin torque is small. On the caliper or the part fixedly connected with the caliper, there is a pad abutment part that receives two friction pads on the rotating side of the disc rotor. Due to the above structure, a single hook can be used. The pins are used to support the two friction pads, thereby reducing the number of parts and the assembly workload, and can prevent the two friction pads from shaking, and can also prevent the excessive load generated by the braking torque from acting on the hitch pin.

Claims (1)

1. dish brake has: discal rotor (24), clamp the clamp (21) of this discal rotor (24) peripheral part, be configured in a pair of friction pads (32 between discal rotor (24) bi-side and clamp (21) respectively ₁, 32 ₂), parallel axes is in the spin axis of discal rotor (24) and be located at being used on the clamp (21) and support two friction padss (32 ₁, 32 ₂) hanger pin (38) and be located at two friction padss (32 ₁, 32 ₂) and clamp 921) between and two friction padss (32 ₁, 32 ₂) towards the packing spring (40) of the rotating center direction of discal rotor (24) pushing; It is characterized in that, single supporting two friction padss (32 are set on clamp (21) ₁, 32 ₂) hanger pin (38) of peripheral part; On packing spring (40), be provided with and change side over to two friction padss (32 at discal rotor (24) ₁, 32 ₂) circumferencial direction one side towards the side spring portion (40b) that changes over to of the rotating center direction of discal rotor (24) pushing with produce side two friction padss (32 at discal rotor (24) ₁, 32 ₂) the circumferencial direction opposite side towards the side spring portion (40c) that produces of the rotating center direction of discal rotor (24) pushing; Make at two friction padss (32 by producing side spring portion (40c) ₁, 32 ₂) going up the torque settings around hanger pin (38) that produces must be than making at two friction padss (32 by changing side spring portion (40b) over to ₁, 32 ₂) upward generation is little around hanger pin (38) torque; Clamp (21) or with parts (20) that these clamp (21) are fixedlyed connected on, be provided with in the side that produces of discal rotor 24 and bear two friction padss (32 ₁, 32 ₂) pad abutting part (43,45).

Images