TWI664362B - Disc brake - Google Patents

Abstract

The present invention provides a disc brake capable of suppressing an increase in size.

A pair of friction pads (15, 16), which have a backing material (95, 96) and a backing plate (97, 98) to which the backing material (95, 96) can be attached; the backing plate (97, 98) An end portion side of the disc rotating direction is formed with arms (100, 100) protruding radially toward the disc; a base (13) is formed with a base portion mounted on a non-rotating portion of the vehicle ( 28), and a torque receiving portion (29) that spans the disk (12) from the end of the disk rotation direction end of the base portion (28) and extends axially toward the disk; A pair of projecting portions (46, 47) extending axially of the disc through the arms (100, 100) of the pair of friction pads (15, 16).

Description

Disc brake

The present invention relates to a disc brake for braking a vehicle.

Among the disc brakes used to brake a vehicle, there are the following: a plate and a pin are used to form a carrier, the pin is inserted into a hole in the back plate of the friction pad, and the braking torque is transmitted from the friction pad to the pin (For example, Patent Document 1).

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Application Publication No. 2012-122598

When this structure transmits the braking torque from the back plate of the friction pad to the pin inserted into the hole of the back plate, the pin receives the braking torque in a line contact manner. In this way, since the surface pressure becomes high, it is necessary to increase the strength of the pin. Degrees, and this is closely related to the overall size of the disc brakes.

An object of the present invention is to provide a disc brake capable of suppressing an increase in size.

In order to achieve the above object, the present invention is structured such that: a pair of friction pads of the back plate is formed with an arm portion extending radially toward the disc at the end side of the disc rotation direction; and a carrier is formed with a base portion The end portion side of the disc rotating direction spans the disc and projects toward the disc axis in the axial direction; the moment receiving portion has each of the aforementioned arm portions via the pair of friction pads, and faces the disc axis A pair of extensions.

According to the present invention, it is possible to provide a disc brake capable of suppressing an increase in size.

11, 11A‧‧‧Disc brake

12‧‧‧Disc

12a, 12b‧‧‧ surface

13, 13A‧‧‧ Vehicle

14‧‧‧ Calipers

15, 16‧‧‧ Friction pads

17‧‧‧ pad spring

18, 19‧‧‧ lead out hood

20‧‧‧ Non-rotating part of the vehicle

25, 25A‧‧‧Mounting bracket

26, 27‧‧‧Guide pins

28‧‧‧ base

28a, 28b‧‧‧ surface

29, 29A‧‧‧Moment receiving department

31‧‧‧Rotation direction extension

32‧‧‧ radial protrusion

33, 34‧‧‧ mounting holes

35, 36‧‧‧Fixed section

38, 39‧‧‧ guide pin mounting holes

41‧‧‧ Bend

42, 42A‧‧‧Torque receiving body

43‧‧‧Bent substrate section

43a‧‧‧ surface

44, 45‧‧‧ curved protrusion

46, 47‧‧‧ extension

46a, 47a‧‧‧ Outer

46b, 47b‧‧‧ inside face

48‧‧‧Front Link

48a‧‧‧ surface

50‧‧‧through hole

52‧‧‧Fixed shaft

53‧‧‧ intermediate shaft

54‧‧‧ flange

55‧‧‧Guide shaft

58‧‧‧caliper body

59‧‧‧Piston

60‧‧‧Sealing ring

61‧‧‧Pressure Seal

63‧‧‧ advancement

65‧‧‧Pressure cylinder

66‧‧‧Knot Bridge Department

67‧‧‧Claw

70, 71‧‧‧ sliding guide

72, 73‧‧‧ guide pin support holes

75‧‧‧Snake belly

77‧‧‧boring

79‧‧‧Piping connection hole

80‧‧‧ Vent hole plug

81‧‧‧ recess

85, 86‧‧‧ Screw-in side protrusion

91‧‧‧Guide shaft

95, 96‧‧‧ come to order

97, 98‧‧‧ back plate

99‧‧‧Motherboard Department

100‧‧‧ Arm

101‧‧‧ end protrusion

102, 103‧‧‧ protrusion

105‧‧‧Substrate Department

106‧‧‧ protruding plate

106a, 106b ‧‧‧ outside face

107, 108‧‧‧ engagement protrusion

107a, 108a

112‧‧‧ engagement hole

112a, 112b‧‧‧Plane Department

112c, 112d‧‧‧ Curved face

121, 122‧‧‧ slots

Fig. 1 is a perspective view of the disc brake of the first embodiment as viewed from the outside.

Fig. 2 is a perspective view of the disc brake of the first embodiment as viewed from the inside.

Fig. 3 is a sectional view of the disc brake of the first embodiment as viewed from the inside.

Fig. 4 is a sectional view of the disc brake of the first embodiment as viewed from the side where the disc is turned out.

Fig. 5 shows a disc brake vehicle according to the first embodiment, wherein (a) is a left side view, (b) is a top view, (c) is a front view, and (d) is a bottom view.

Fig. 6 shows a disc brake vehicle according to the first embodiment, wherein (a) is a right side view and (b) is a rear view.

Fig. 7 shows a pair of friction pads of the disc brake of the first embodiment, in which (a) is a left side view, (b) is a top view, (c) is a front view, and (d) is a bottom view.

Fig. 8 shows a pair of friction pads of the disc brake of the first embodiment, in which (a) is a right side view and (b) is a rear view.

Fig. 9 is a perspective view showing a pair of friction pads of the disc brake of the first embodiment.

Fig. 10 is a perspective view of the disc brake of the second embodiment as viewed from the inside.

[First Embodiment]

A first embodiment of the present invention will be described with reference to FIGS. 1 to 9 as follows.

The disc brake of the first embodiment is a disc brake for a vehicle, specifically a motorcycle. As shown in Figures 1 to 4 As shown, the disc brake 11 includes a disc 12, a carrier 13, and a caliper 14. The disc brake 11 includes a pair of friction pads 15 and 16 as shown in FIGS. 1, 2 and 4, pad springs 17 as shown in FIG. 3, and FIG. 4. The boot cover 18 shown in FIG. 2 and the boot cover 19 shown in FIGS. 1 and 4.

The vehicle 13 is fixed to a non-rotating portion 20 indicated by a two-dot chain line in FIG. 3 such as a front fork or a rear fork of a vehicle. As shown in FIGS. 1 to 3, the disc 12 is formed in a disc shape, and is provided on wheels (not shown) of a vehicle to be braked by the disc brake 11, and rotates together with the wheels. The caliper 14 is supported by the carrier 13 so as to be slidable across the disc 12. A pair of friction pads 15 and 16 are oppositely arranged on both sides 12a and 12b of the disc 12 as shown in FIG. 4 and are supported by the carrier 13 and the caliper 14 as shown in FIGS. 1 to 3. Able to slide. In addition, the arrow R shown in FIGS. 1 to 3 shows the rotation direction of the disc 12 when the vehicle is moving forward, and the entrance side of the rotation direction is set to the disc rotation in side, and the exit side is set to the disc. Hover out side and proceed as follows. In addition, the axis direction of the disc 12 is set to the disc axis, the diameter direction of the disc 12 is set to the disc radial direction, and the rotation direction of the disc 12 is set to the disc rotation direction or the disc circumferential direction.

As shown in FIG. 5 and FIG. 6, the carrier 13 is composed of only three mounting brackets 25 and a pair of guide pins 26 and 27 integrally fixed to the mounting bracket 25. Made of parts. The mounting bracket 25 and the guide pins 26 and 27 are made of metal.

The mounting bracket 25 has surfaces on both sides in the thickness direction. The portions 28a, 28b constitute a parallel flat base portion 28; and a moment receiving portion 29 that is bent and extended from the base portion 28, and is formed by a member. The mounting bracket 25 is such that its base portion 28 is mounted on the non-rotating portion 20 of the vehicle as shown in FIG. 3. As shown in FIG. 4, the base portion 28 is provided on the outer side (opposite to the wheel) of one of the two sides 12 a and 12 b of the disc 12 (opposite to the wheel), and the surface portions 28 a and 28 b The posture in the plane orthogonal to the axial direction of the disc is fixed to the non-rotating portion 20 of the vehicle shown in FIG. 3. In this way, in a state where the base portion 28 has been mounted on the non-rotating portion 20 of the vehicle, the torque receiving portion 29 is rotated from the disc on the side of the disc rotation direction end portion of the base portion 28 as shown in FIG. 2. The end side projects across the disc 12 and protrudes toward the inner side as the other surface 12 b side of the disc 12 along the disc axial direction.

As shown in FIG. 3, the base portion 28 includes a rotation direction extension portion 31 that extends substantially toward the disk rotation direction as a whole, and a radial extension portion 32 that rotates from the disk extension of the rotation direction extension portion 31. The end on the exit side protrudes outward in the radial direction of the disc. The radial extension portion 32 is perpendicular to the center axis of the disc 12 and parallel to a line (hereinafter, referred to as a radial reference line) passing through the pressing center of the caliper 14 (the center axis of the piston 59 described later), and Extending from the rotation direction extension portion 31.

In the rotation direction extension portion 31, a mounting hole 33 is formed at an end portion of the disc rotation side and penetrates along the disc axis, and is located closer to the middle position of the disc rotation direction of the disc rotation side than the mounting hole 33. A mounting hole 34 is formed to penetrate the disc in the axial direction. Female screws are formed in the mounting holes 33 and 34 on the respective inner peripheral surfaces. Carrier 13 is for the installation of base 28 The fixing portion 35 around the hole 33 and the fixing portion 36 around the mounting hole 34 are fixed to the non-rotating portion 20 of the vehicle by mounting bolts (not shown) screwed to the mounting holes 33 and 34, respectively.

A guide pin mounting hole 38 is formed in the base portion 28 of the mounting bracket 25 so as to penetrate through the radial extension portion 32 along the disk axis. A guide pin mounting hole 39 is formed in the base portion 28 of the mounting bracket 25 at the end position of the disk-screw-in side of the rotation direction extension portion 31 and penetrates along the disk axis. In other words, guide pin installation holes 38 and 39 are formed in the base portion 28 of the mounting bracket 25 at both ends. Further, mounting holes 33 and 34 are formed between the aforementioned guide pin mounting holes 38 and 39. The guide pin mounting hole 38 is disposed more radially outward of the disc than the guide pin mounting hole 39 and the disc is turned out.

As shown in FIGS. 5 and 6, the torque receiving portion 29 includes a bent portion 41 near the base portion 28 and a torque receiving body portion 42 on the opposite side from the base portion 28.

The bent portion 41 is bent from an edge portion on the side opposite to the rotation direction extension portion 31 of the radial extension portion 32 toward the thickness direction side of the base portion 28. The curved portion 41 includes a curved substrate portion 43 and a pair of curved protruding portions 44 and 45. The curved substrate portion 43 is extended from the radial extension portion 32 so as to have the same width as the radial extension portion 32.

The pair of curved protruding portions 44 and 45 are away from the base portion 28 from the width direction both end sides of the end portion of the curved substrate portion 43 opposite to the radial protrusion portion 32 toward the base portion 28 in the thickness direction side. Ways stand out. Of the curved projections 44 and 45, the other curved projection 45 is disposed more inward than the one curved projection 44 in the mounting bracket 25. The surface portion 43 a of the curved substrate portion 43 between the pair of curved protrusions 44 and 45 is parallel to the surface portions 28 a and 28 b of the base portion 28. Therefore, in a state where the carrier 13 has been fixed to the non-rotating portion 20 of the vehicle shown in FIG. 3, the surface portion 43a shown in FIG. 5 is also disposed on the disc shaft in the same manner as the surface portions 28a and 28b. Into an orthogonal plane.

As shown in FIG. 5 and FIG. 6, the moment receiving body portion 42 is formed in a flat plate shape, and the edge portion of the bent portion 41 on the side opposite to the base portion 28 faces away from the base along the thickness direction of the base portion 28. The direction of the portion 28 protrudes. In other words, the torque receiving body portion 42 is extended along the disk axis. The moment receiving body portion 42 is perpendicular to the surface portion 28a. The torque receiving body portion 42 includes a pair of projecting portions 46 and 47 and a front end connecting portion 48. The protruding portion 46 protrudes from the end of the curved protruding portion 44 on the side opposite to the curved substrate portion 43 in the thickness direction of the base portion 28. The protruding portion 47 protrudes from the end portion of the curved protruding portion 45 opposite to the curved substrate portion 43 in the thickness direction of the base portion 28. Therefore, among the protruding portions 46 and 47, the other protruding portion 47 is disposed more inward than the one protruding portion 46 in the mounting bracket 25.

The front-end connecting portion 48 connects the protruding front-end sides of the pair of protruding portions 46 and 47 to each other. In other words, the pair of extension portions 46 and 47 of one of the torque receiving portions 29 is such that the extended front end portions are mutually connected by the front end connection portion 48. The moment receiving portion 29 is connected to the middle portion and has a substantially rectangular through hole surrounded by a curved substrate portion 43, a pair of curved protruding portions 44 and 45, a pair of protruding portions 46 and 47, and a front end connecting portion 48. Hole 50. The torque receiving body portion 42 is connected to the disc rotating side of the mounting bracket 25 A through hole 50 is formed in the center of the flat portion at the end.

In a state in which the carrier 13 is fixed to the non-rotating portion 20 of the vehicle shown in FIG. 3, as shown in FIG. 2, the protruding portion 46 is arranged in the torque receiving portion 29 on the disc-turning side and faces the The disc extends axially. Moreover, the extension part 47 is arrange | positioned in the torque receiving part 29 on the disk rotation-in side, and it extends to the disk axial direction. The through hole 50 is formed in a middle portion between the disk rotation direction and the disk axial direction of the torque receiving portion 29 so as to be separated from the disk radial direction. As shown in FIG. 3, the outer portions 46a, 47a on the radially outer side of the disk of the pair of protruding portions 46, 47 are arranged in the same plane orthogonal to the radial reference line. The inner surface portions 46b, 47b of the through-holes 50 forming a pair of protruding portions 46, 47 face each other and are parallel to the center axis of the disc 12 and the radial reference line. In other words, the inner surface portions 46b and 47b of the pair of protruding portions 46 and 47 are perpendicular to the outer surface portions 46a and 47a along the disc axis. The surface portion 48a forming the through-hole 50 of the distal end connecting portion 48 shown in FIG. 5 is arranged in a plane orthogonal to the disk axial direction.

The mounting bracket 25 is, for example, blanked from a sheet metal material having a constant thickness by a press forming method to form a shape including a portion which later becomes the through-hole 50, and thereafter, a bent portion 41 is formed by a bending process. As a result, the through hole 50 can also be formed. On the other hand, the mounting holes 33 and 34 and the guide pin mounting holes 38 and 39 are formed by cutting.

The pair of guide pins 26 and 27 shown in FIGS. 5 and 6 are common parts of the same material and shape. The guide pins 26 and 27 are sequentially from one end in the axial direction, and include: a fixed shaft portion 52 having a small diameter; and an intermediate shaft portion 53 having a larger diameter than the fixed shaft portion 52; The flange portion 54 and a guide shaft portion 55 having a smaller diameter than the fixed shaft portion 52. The guide pins 26 and 27 are fixed to the guide pin 26 by fitting the guide pin 26 and the guide pin 27 in the respective fixed shaft portions 52 so as to protrude in the opposite direction to the torque receiving portion 29 as a whole of the base portion 28. Hole 38 and guide pin mounting hole 39. In addition, the pair of guide pins 26 and 27 do not necessarily need to be common parts of the same material and shape, but the guide pins 26 and 27 may be different materials or different shapes.

In a state in which the carrier 13 is fixed to the non-rotating portion 20 of the vehicle shown in FIG. 3, as shown in FIG. It protrudes in the opposite direction of the disc 12. As shown in FIG. 3, the guide pin 26 installed in the guide pin installation hole 38 is disposed more radially outward of the disk than the guide pin 27 installed in the guide pin installation hole 39 and the disk is rotated out.

As shown in FIG. 1, the caliper 14 is a so-called pin slide type caliper by supporting the carrier 13 so as to be able to slide axially toward the disc via the guide pins 26 and 27. As shown in FIG. 4, the caliper 14 includes a caliper body 58, a piston 59, a seal ring 60, and a pad pin 63 shown in FIGS. 1 and 2.

The caliper body 58 is formed by cutting from an aluminum alloy or the like, and is formed by cutting. The caliper body 58 is slidable across the disc 12 as shown in FIGS. 1 to 4. Ground is attached to the guide pins 26 and 27 shown in the first figure of the carrier 13. As shown in FIG. 4, the caliper body 58 includes a pressure cylinder portion 65, a bridge portion 66, and a claw portion 67. The pressure cylinder portion 65 is disposed outside the disc 12. Knot bridge 66 The end portion on the radially outer side of the disc portion 65 of the power cylinder portion 65 projects toward the inside so as to cross the radially outer side of the disc plate 12. The claw portion 67 protrudes from the inner end of the knot bridge portion 66 toward the inner side of the disc radial direction so as to face the pressure cylinder portion 65.

As shown in FIG. 1, the pressure cylinder portion 65 is formed with slide guide portions 70 and 71. The slide guide part 70 is formed so that it may protrude toward the disk rotation-out side from the intermediate position of the disk radial direction of the disk rotation-out side of the pressure cylinder part 65. The slide guide portion 71 is formed so as to protrude inwardly of the disk radial direction from the middle position in the disk circumferential direction of the disk radial inner side of the pressure cylinder portion 65 and the disk rotation side enters. A guide pin support hole 72 is formed in the slide guide 70 along the disc axis from the disc 12 side to a midway position in the disc axis. A guide pin support hole 73 is formed in the slide guide portion 71 so as to extend through the disc axis direction.

A guide pin support hole 72 of the slide guide portion 70 is a guide shaft portion 55 in which a guide pin 26 on a disc-swing-out side is slidably fitted. Therefore, the slide guide 70 is slidably supported by the guide shaft portion 55 of the guide pin 26 of the carrier 13.

The lead-out cover 18 shown in FIGS. 1 and 2 is a tube-shaped, expandable, bellows-shaped rubber part that is open at both ends. The lead-out cover 18 locks the open end of one end to the slide guide 70 and is in close contact with the slide guide 70, and the open end of the other end is locked to the flange of the guide pin 26 shown in Figs. 5 and 6. The portion 54 is in close contact with the base portion 28 of the mounting bracket 25. As a result, the guide pin support hole 72 and the extraction cover 18 of the slide guide 70 shown in FIG. 1 always cover the guide shaft portion 55 of the guide pin 26.

An extraction cover 19 is fitted into the guide pin support hole 73 of the slide guide 71. The lead-out cover 19 is a cylindrical rubber member with a cover that is closed at one end side and open at the other end side. The lead-out cover 19 is fitted into the guide pin support hole 73 of the slide guide 71 from the disc 12 side with the closed side as an opening. In this state, the guide shaft portion 55 of the guide pin 27 on the side where the disc is rotated can be inserted into the inside of the lead-out cover 19 from the opening side. Therefore, the slide guide portion 71 and the lead-out cover 19 can be supported by the guide shaft portion 55 of the guide pin 27 of the carrier 13 so as to be slidable.

Here, the cover 19 is drawn out so that its open side is locked to the flange portion 54 shown in FIGS. 5 and 6 of the guide pin 27 and is in close contact with the base portion 28 of the mounting bracket 25. As shown in FIG. 1, the lead-out cover 19 is formed with a bellows 75 capable of expanding and contracting between the slide guide 71 and the mounting bracket 25. The bellows 75 is extended and extended while covering the lead-out cover 19. The guide shaft portion 55 of the guide pin 27.

With the above, the caliper body 58 is supported by the guide pins 26 and 27 provided on the carrier 13 so as to be able to slide axially toward the disc. In this embodiment, the guide pins 26 and 27 are mounted on the carrier 13 and the pair of guide pins 26 and 27 are inserted into the guide pin support holes 72 and 73 of the caliper body 58. The caliper body 58 is slid and guided to the carrier 13, but the slide guides 70 and 71 may be formed in the shape of a pin protruding toward the disc axis in the opposite direction, and the pair of slide guides 70 and 71 may be formed. It can be slid into the hole of the carrier 13.

As shown in FIG. 4, a bottomed boring is formed in the pressure cylinder portion 65 so as to open toward the claw portion 67 side along the disc axis. (bore) 77. As shown in FIG. 1, in the pressure cylinder portion 65, a piping connection hole 79 parallel to the radial reference line is formed on the radially outer portion of the disc. A brake pipe (not shown) is connected to the piping connection hole 79. . Further, the pressure cylinder portion 65 is attached closer to the disc-turning-out side than the piping connection hole 79, and a bleeding plug 80 for exhaust is attached. The piping connection hole 79 and the vent hole plug 80 communicate with the inside of the boring hole 77 shown in FIG. 4.

The piston 59 is made of metal and is arranged to be movable within a bore 77 of the pressure cylinder portion 65. The piston 59 moves toward the disc axis in a posture along the axis of the disc. A rubber seal ring 60 is installed at an intermediate position in the disk axial direction of the bore 77 of the pressure cylinder portion 65 to seal the gap with the piston 59 and to support the piston 59. The seal ring 60 is used to seal the brake fluid in the boring hole 77. When hydraulic pressure is applied to the boring hole 77, the piston 59 is elastically deformed by the movement of the piston 59, and when the hydraulic pressure is released, it returns to the initial state. State, whereby the piston 59 is retracted. A wiper seal 61 is attached to the open side of the bore 77 of the pressure cylinder portion 65. The pressure seal 61 is provided to restrict foreign matter from entering the boring hole 77.

A recess 81 is formed in the claw portion 67 to allow the cutting tool to pass when the inside of the boring hole 77 is processed. The recess 81 is formed in a shape recessed outward in the radial direction of the disc as shown in FIG. 2. It is formed in the middle of the disc rotation direction.

As shown in FIG. 1, a screw-in-side protruding portion 85 protruding toward the disk-turning-in side is formed outside the disk in the radial direction of the pressure cylinder portion 65 and on the disk-turning-in side. On the disc radial outside of the claw portion 67 and the disc rotating side, A screw-in side protrusion 86 protruding toward the disk screw-in side is also formed.

The pad pin 63 is fitted into a through hole (not shown) extending toward the disc axis, and the through hole is provided in the screw-in side protruding portions 85 and 86 of the caliper body 58. The pad pin 63 is a cylindrical guide shaft portion 91 having a certain diameter, and the guide shaft portion 91 is arranged in the state where the pad pin 63 is fitted to the screw-in side protrusions 85 and 86 as described above. between. The spacer pin 63 is made of metal and is arranged along the disc axis with the guide shaft portion 91 and straddling the disc 12 so as to be closer to the disc radial outer side than the disc 12 and closer to the bridge bridge portion 66 than the disc bridge portion 66. The disc circled into the side.

As shown in FIG. 1 and FIG. 2, a pair of friction pads 15 and 16 are oppositely disposed on both sides 12 a and 12 b of the disc 12, and are supported by the moment receiving portion 29 of the carrier 13 and the pad pin 63. The guide shaft portion 91 is supported. Specifically, the friction pad 15 is disposed outside the one surface 12 a side of the disc 12, and the friction pad 16 is disposed inside the other surface 12 b of the disc 12.

As shown in FIG. 4, the outer friction pad 15 includes: a backing material 95 which is in contact with the surface 12 a of the disc 12 to cause frictional resistance; and a metal back plate 97 which is provided for this purpose.来 令 材 95 stickers. In addition, the inner friction pad 16 is provided with a backing material 96 which is in contact with the surface 12b of the disc 12 to cause frictional resistance; and a metal back plate 98 which is capable of being attached to the backing material 96. Attached.

The back plates 97 and 98 are common parts that are made of the same material and the same shape and are common to the outer friction pad 15 and the inner friction pad 16. Here, the back plate 97 of one friction pad 15 will be described as an example. Bright. As shown in FIG. 3, the back plate 97 includes a main plate portion 99, an arm portion 100, an end protruding portion 101, a protruding portion 102, and a protruding portion 103.

The main plate portion 99 is a portion where the backing material 95 in the back plate 97 can be adhered and fixed. The main plate portion 99 is adhered and fixed to the main plate portion 99 on the surface of the disc 12 side. The arm portion 100 extends from an end portion on the disc rotation-out side of the disc rotation direction end portion side of the main plate portion 99 and protrudes outward from the disc radial direction, and is locked to the torque receiving portion 29 of the carrier 13. The end portion protruding portion 101 is an end portion of the main plate portion 99 from the disk-screw-in side, protrudes toward the disk-screw-in side, and is locked to the pad pin 63. The protruding portion 102 projects radially outward from the middle portion in the disk rotation direction of the disk radial outer edge of the main plate portion 99. The protruding portion 103 protrudes from the end protruding portion 101 side toward the radially outer side than the protruding portion 102 on the radially outer edge of the disk of the main plate portion 99.

The arm portion 100 on the side where the disc is rotated out includes a base plate portion 105, an extension plate portion 106, and a pair of engaging convex portions 107 and 108. The base plate portion 105 protrudes obliquely from the end portion on the disc-screw-out side of the main plate portion 99 toward the outer side in the disc radial direction and the disc-out side. The projecting plate portion 106 projects from the end portion of the base plate portion 105 on the side opposite to the main plate portion 99 and the radial reference line in parallel with the radial direction of the disk. The pair of engaging convex portions 107 and 108 protrude from the end portions of the protruding plate portion 106 opposite to the substrate portion 105 toward both sides of the disc rotation direction. Specifically, the engaging convex portion 107 protrudes from the extending plate portion 106 toward the disc-turning side, and the engaging convex portion 108 protrudes from the extending plate portion 106 toward the disc-turning side. That is, the protruding plate portion 106 and the pair of engaging convex portions 107 and 108 are formed in a substantially T-shape when viewed in the axial direction of the disc.

Here, when the friction pads 15 and 16 are mounted on the carrier 13, the arm portion 100 has the protruding plate portion 106 disposed between the protruding portions 46 and 47 of the torque receiving portion 29, and a pair of engaging convex portions 107 and 108 are radially outward of the disks engaged with the protrusions 46 and 47. At this time, the projecting plate portion 106 is such that the outer side surface portion 106a of the disc rotating side is parallel to the center axis of the disc 12 and the radial reference line, and can protrude to the disc rotating side with surface contact. The inner surface portion 46b of the portion 46. In addition, the outer side surface portion 106b of the disc-screw-in side is parallel to the center axis of the disc 12 and the radial reference line, and is in surface contact with the inner surface portion 47b of the extension portion 47 of the disc-turn-in side. At this time, the engaging surface portion 107 a on the radially inner side of the disk of the engaging convex portion 107 is disposed in a plane orthogonal to the radial reference line and is in surface contact with the outer surface portion 46 a of the protruding portion 46. At this time, the engaging surface portion 108 a on the radially inner side of the disk of the engaging convex portion 108 is disposed in a plane orthogonal to the radial reference line and is in surface contact with the outer surface portion 47 a of the protruding portion 47.

Here, the distance between the outer surface portions 106 a and 106 b of the protruding plate portion 106 is smaller than the distance between the inner surface portions 46 b and 47 b in order to be able to be placed between the protruding portions 46 and 47 of the torque receiving portion 29. However, the difference between the distance between the inner surface portions 46b and 47b and the distance between the outer surface portions 106a and 106b is set to be greater than that of the engagement surface portions 107a and 108a protruding from the protruding plate portion 106 from the engagement convex portions 107 and 108. The respective protrusion length is smaller. In other words, the maximum size of the disk rotation direction between the engaging projections 107 and 108 is set to be larger than the size of the disk circumferential direction of the through hole 50. With this, as long as the back plate 97 is in the posture along the disc 12, the back plate 97 is engaged. The convex portions 107 and 108 do not detach from the extending portions 46 and 47 toward the disk radially inward.

The end protruding portion 101 is formed so as to penetrate axially toward the disc, and an elongated hole-shaped engaging hole 112 is formed in the disc circumferential direction. The engaging hole 112 includes: a flat portion 112a positioned radially inward of the disc and disposed in a plane orthogonal to the radial reference line; and a flat portion 112b positioned radially outward of the disc and It is arranged in a plane orthogonal to the radial reference line; and a curved surface portion 112c, which is located on the side where the disc is turned out and constitutes a semi-cylindrical surface having a central axis in the engaging hole 112; and a curved surface portion 112d, which is A semi-cylindrical surface having a central axis in the engaging hole 112 is located on the side where the disc is screwed in.

Then, the guide shaft portion 91 of the pad pin 63 is inserted into the engaging hole 112. At this time, the flat portion 112a and the flat portion 112b which is parallel to the flat portion 112a can be abutted against a cylindrical shape.轴 轴 部 91。 Guide shaft portion 91. In addition, when the guide shaft portion 91 of the pad pin 63 is inserted through the engagement hole 112, the curved surface portions 112c and 112d are formed between the guide shaft portion 91 and the guide shaft portion 91 so as to create a predetermined gap in the disk rotation direction.

As shown in FIGS. 7 to 9, the back plate 97 is formed in a flat plate shape. For example, a back plate 97 is punched out of a metal plate having a constant thickness by a press forming method, thereby including the engagement hole 112 to form its outer shape.

Based on the above, as shown in FIG. 3, the outer friction pad 15 enables the arm portion 100 formed on the disc-turning-out side to be supported by the torque receiving portion 29 of the carrier 13 so as to be slidable, and the disc-circling The engaging hole 112 on the entry side is supported by the guide shaft portion 91 of the pad pin 63 so as to be slidable. In addition, the torque receiving portion 29 and the guide shaft portion 91 can be used to guide the axial movement of the disc.

The friction pad 15 causes the projections 102 and 103 to abut against the pad spring 17. The pad spring 17 biases the friction pad 15 toward the radially inner side of the disk and the disk is rotated out. As a result, the friction pad 15 causes the engaging surface portion 107a of the engaging convex portion 107 to contact the outer surface portion 46a of the protruding portion 46 and the engaging surface portion 108a of the engaging convex portion 108 to surface contact with the extending portion when not braking. The outer surface portion 47 a of the protruding portion 47 and the outer surface portion 106 a of the protruding plate portion 106 are brought into surface contact with the inner surface portion 46 b of the protruding portion 46. In addition, the friction pad 15 separates and faces the outer side surface portion 47b of the projecting portion 47 and the inner side surface portion 47b of the projecting portion 47 during non-braking. In addition, a groove 121 parallel to the radial reference line is formed on the outer side of the friction pad 15 from the command material 95 on the arm portion 100 side in the disk rotation direction.

As shown in FIGS. 7 to 9, the inner friction pad 16 uses a back plate 98 common to the outer pad 97 of the outer friction pad 15, and the back plate 98 is connected to the outer friction pad 15. The approximately common lining material 96 is formed by being adhered and fixed in the opposite direction of the front and back. In other words, the back plate 97 on the inner friction pad 16 is adhered and fixed to the surface 96 on the side of the disc 12 serving as the main plate portion 99. Here, the inner side of the friction material 16 of the friction material 16 is formed with a groove 122 parallel to the radial reference line at the end protruding portion 101 side of the disc rotation direction. Only this point is different from the ground material 95. .

The inner friction pad 16 is the same as the outer friction pad 15. As shown in FIG. 2, an arm portion 100 is formed at an end portion on the side where the disc is turned out. As shown in FIG. 1, an end portion protruding portion 101 is formed at an end portion on the side where the disc is screwed in, and an engagement hole 112 is formed in the end portion protruding portion 101. In addition, as shown in FIGS. 8 and 9, the inner friction pad 16 has a shape formed with protrusions 102 and 103 protruding from the main plate portion 99 toward the same side as the extending direction of the arm portion 100.

As shown in FIG. 2, the inner friction pad 16 is also disposed between the protruding portions 46 and 47 of the torque receiving portion 29 to support the outer friction pad 15. It protrudes from the plate portion 106 and engages the pair of engaging convex portions 107 and 108 with the protruding portions 46 and 47. In addition, the inner friction pad 16 is an engagement hole 112 formed on the disc-screw-in side as shown in FIG. 1. In order to abut the flat portions 112a and 112b, one side is formed on both sides of the disc rotation direction. A gap-shaped guide shaft portion 91 for supporting the pad pin 63 of the outer friction pad 15 is inserted through the gap.

With the above, the inner friction pad 16 also enables the arm portion 100 formed on the disc rotation side to be supported by the torque receiving portion 29 of the carrier 13 so as to be slidable, and the disc rotation side engagement hole 112, It is supported by the guide shaft portion 91 of the pad pin 63 so as to be slidable, and the axial movement of the disc can be guided by the torque receiving portion 29 and the pad pin 63 described above. In other words, the torque receiving portion 29 is provided with a pair of protruding portions 46 and 47 extending axially toward the disc via the arm portions 100 and 100 of the pair of friction pads 15 and 16. In addition, the back plate 97 of the inner friction pad 16 also causes the protrusions 102 and 103 to be elastically biased toward the disk radially inward side by the pad spring 17 shown in FIG. Then, the inner friction pad 16 and the disc 12 are On the opposite side, the claw portion 67 of the caliper 14 is disposed, and on the outer side of the friction pad 15 opposite to the disc 12, the pressure cylinder portion 65 of the caliper 14 is disposed.

In this way, the friction pads 15 and 16 are such that the arm portion 100 on one side of the disc rotation direction is supported by the carrier 13 and the end protrusion 101 on the other side of the disc rotation direction is supported by the caliper 14 .

Here, the maximum size between the respective engagement projections 107 and 108 of the friction pads 15 and 16 and the disk axial dimension of the through hole 50 are caused by the two friction pads 15 and 16 along the disk. The axial posture is set so that the arm portions 100 and 100 of the back plates 97 and 98 can be inserted into the through holes 50. Specifically, the length obtained by subtracting one plate thickness of the back plates 97 and 98 from the length in the axial direction of the disc of the through hole 50, in other words, the distance between the surface portion 43a and the surface portion 48a, is set to be more than the card. The maximum length between the convex portions 107 and 108 is wider, and the sheet thickness of one of the back plates 97 and 98 is set to be smaller than the distance between the inner surface portions 46b and 47b.

In the disc brake 11 having the above configuration, when the vehicle is moving forward, when the brake pipe (not shown) passes through the pipe connection hole 79 of the caliper 14 and the brake fluid is introduced into the bore 77 of the pressure cylinder portion 65, Then, the piston 59 is advanced to the claw portion 67 side by the brake hydraulic pressure. In this way, the piston 59 moves axially toward the disc and protrudes to the disc 12 side, and presses the friction pad 15 which is one of the pair of friction pads 15 and 16 on the outside. Thereby, the outer friction pad 15 will slide on the guide shaft portion 91 of the pad pin 63 and a pair of protruding portions 46 and 47 of the carrier 13 and contact the surface 12 a of the disc 12. On the other hand, with this reaction force, the caliper body 58 slides on the guide shaft portions 55 and 55 of the guide pins 26 and 27 and presses the inner friction pad. 16 to move the claw portion 67 to the disc 12 side. Thereby, the inner friction pad 16 will slide on the guide shaft portion 91 of the pad pin 63 and a pair of protruding portions 46 and 47 of the carrier 13 and contact the surface 12 b of the disc 12. In this way, the caliper 14 causes a pair of friction pads 15 and 16 disposed on both sides 12a and 12b of the disc 12 to contact the both sides 12a and 12b of the disc 12 and brakes the disc by the friction resistance. 12. In other words, wheels.

Then, during braking during the forward movement of the vehicle, a braking torque is generated in the pair of friction pads 15 and 16 from the disk rotation-in side toward the disk rotation-out side. The protruding portion 46 on the side where the disc is turned out as the main body of the carrier 13 is the arm portions 100 and 100 of the pair of friction pads 15 and 16 abutted from the outer surface portions 106a and 106b along the inner surface portion 46b. To receive the braking torque in the rotation direction of the disc. In contrast, the pad pins 63 of the caliper 14 support the pair of friction pads 15 and 16 together with the engaging holes 112 and 112 which are longer in the disc rotation direction, and the engaging holes 112 and 112 and the pad pins 63 are supported together. , A predetermined gap is set along the disc rotation direction. Therefore, the pad pin 63 and even the caliper 14 do not receive the braking torque of the disc rotation direction from the pair of friction pads 15 and 16. In other words, the disc brake 11 is a push-type disc brake having a torque receiving portion 29 on the disc rotation-out side as an extension 46 on one side of the disc rotation-out side. The main body receives the braking torque generated by the pair of friction pads 15 and 16 during braking when the vehicle is moving forward. Here, during braking when the vehicle is moving backward, the protruding portion 47 is used as the main body of the torque receiving portion 29 of the vehicle 13 and a pair of frictions abutting from the outer surface portions 106a and 106b along the inner surface portion 47b thereof. The arm portions 100 and 100 of the pads 15 and 16 receive braking torque.

In addition, contrary to the above, the disc brake 11 can also be used as a pull type disc brake that receives the braking torque during braking of the vehicle when the disc turns on. In this case, a pair of friction pads 15 and 16 are generated during the braking of the forward movement of the protrusions 47 of the protrusions 46 and 47, which are arranged on the other side of the disc rotating side as the main body. The pad spring 17 is urged by pressing the pair of friction pads 15 and 16 against the protruding portion 47. Even in this case, the pad pin 63 and even the caliper 14 do not receive the braking torque in the disk rotation direction from the pair of friction pads 15 and 16.

In the disc brake described in the aforementioned Patent Document 1, an insertion hole is formed in the back plate of the friction pad, and a rod-shaped pin is inserted into the insertion hole. Then, the pin is abutted against the wall surface of the insertion hole, and the pin receives the braking torque of the friction pad. In this way, when the pin is configured to receive the braking torque of the friction pad, the pin will basically make line contact with the back plate of the friction pad, so the surface pressure will increase, and it is necessary to increase the strength of the pin. Therefore, it is necessary to increase the outer diameter of the pin, thereby increasing the size of the disc brake as a whole. In addition, when the back plate of the friction pad has a structure in which the pins make line contact, it is difficult to suppress the vibration of the friction pad during braking, and there is a possibility that braking noise may occur during braking.

Moreover, in the disc brake described in Patent Document 1, since the pin that receives the braking torque is also used to guide the movement of the caliper, the angle of the pin changes when the braking torque is received, which affects the movement of the caliper. The possibility of hard drag of the friction pad. In addition, since it is necessary to lengthen the length of the pin, high machining accuracy is required, and the material cost is also increased, resulting in an increase in cost.

In contrast, the disc brake 11 of the first embodiment is formed on the disc rotation direction end portions of the back plates 97 and 98 of the pair of friction pads 15 and 16 to form an arm portion 100 that projects radially toward the disc. , 100, and the carrier 13 forms a torque receiving portion 29 that extends from the end of the disc rotation direction end of the base portion 28 across the disc 12 and extends axially toward the disc. Then, the torque receiving portion 29 is a pair of protruding portions 46 and 47 having axially extending plate portions 106 and 106 with the arm portions 100 and 100 of the pair of friction pads 15 and 16 therebetween. . Thereby, one of the friction pads 15 and 16 pair of the arm portions 100 and 100 and the pair of protruding portions 46 and 47 can be brought into surface contact while the vehicle is moving forward and the vehicle is moving backward, and transmission braking torque can be reduced. The surface pressure between the two. Therefore, an increase in size of the disc brake 11 can be suppressed.

In addition, since one of the friction pads 15 and 16 is brought into surface contact with the arm portions 100 and 100 and the pair of protruding portions 46 and 47, vibration of the friction pads 15 and 16 during braking can be suppressed. Therefore, braking noise during braking can be suppressed.

In addition, when the mounting bracket 25 is formed, the plate is bent to form the base portion 28 and the torque receiving portion 29, and the guide pins 26 and 27 as different members are fixed to the base portion 28. Therefore, the torque receiving portion 29 and the guide can be separated. The tasks of the pins 26 and 27 make the guide pins 26 and 27 less susceptible to the influence of the deformation of the torque receiving portion 29 and can improve the durability. Therefore, even if the torque receiving portion 29 receives the braking torque, the influence of the caliper 14 on the movement of the guide pins 26 and 27 can be suppressed, and the hard drag of the friction pads 15 and 16 can be suppressed. In addition, since the length of the guide pins 26 and 27 can be shortened, it can be eased. Processing accuracy can also reduce material costs. Therefore, an increase in cost can be suppressed.

In addition, since the pair of protruding portions 46 and 47 are connected to each other by the leading end connecting portions 48 through the leading end connecting portions 48, it is possible to connect the protruding portions to the other protruding portion when receiving the braking torque respectively. Increased strength. Therefore, the size of the disc brake 11 can be further suppressed, the vibration of the friction pads 15 and 16 during braking can be further suppressed, and the influence of the movement of the caliper 14 due to the deformation of the torque receiving portion 29 can be further suppressed. .

In addition, since both of the friction pads 15 and 16 use common back plates 97 and 98, the natural vibration numbers of the friction pads 15 and 16 are equal. Therefore, the vibration of the friction pads 15 and 16 during braking can be further suppressed, and the brake noise during braking can be further suppressed. In addition, since the common back plates 97 and 98 are used, the number of parts can be reduced. Therefore, the management cost can be reduced, and the mold cost at the time of low-pressure molding can be reduced.

[Second Embodiment]

Next, the second embodiment will be described mainly based on FIG. 10 and focusing on different parts from the first embodiment. The parts that are common to the first embodiment are indicated by the same name and the same reference numerals.

In the disc brake 11A of the second embodiment, a part 13A having a structure different from that of the carrier 13 of the first embodiment is used, and the carrier 13A has a part of the structure and the first embodiment. The mounting bracket 25A is different from the mounting bracket 25A. More specifically, the mounting bracket 25A is a torque receiving portion 29A having a torque receiving body portion 42A that is different from the torque receiving body portion 42 of the torque receiving portion 29 of the first embodiment. The torque receiving body portion 42A is not provided with the front end connection portion 48 of the first embodiment. As a result, the torque receiving body portion 42A separates the projecting portions 46 and 47 and the entire length in the disk axial direction from each other.

According to such a second embodiment, the protruding portions 106 and 106 of the friction pads 15 and 16 can be easily inserted into the protruding portions 46 and 47 of the carrier 13A from the side opposite to the base portion 28 in the disk axial direction. Therefore, it is easy to install the friction pads 15 and 16 to the carrier 13A.

In addition, in the above-mentioned embodiment, although the pair of engaging projections 107 and 108 protruding toward both sides of the disc rotation direction are provided in the arm portion 100, the engaging projections may not be limited to any one. . In such a case, the friction pads 15 and 16 can be mounted on the carrier 13 or 13A without removing the caliper 14 from the carrier 13 or 13A when the friction pads 15 and 16 are exchanged.

According to the disc brake of the above embodiment, the disc brake is a disc brake having a carrier, a pair of friction pads, and a caliper. The carrier is fixed to a non-rotating part of the vehicle, and the pair of friction pads is The carrier is supported by the carrier so as to be slidable and disposed on both sides of the disc. The caliper is a piston having a friction pad for pressing one of the pair of friction pads and is supported by the carrier to be capable of sliding. The aforesaid pair of friction pads has a backing material and a backing plate to which the backing material can be attached. At the end side of the disk rotating direction of the backing plate, an arm protruding radially toward the disk is formed. Department; A torque receiving portion is formed on the base portion of the non-rotating portion, and a torque receiving portion that extends from the end portion of the disk rotation direction end side of the base portion and extends axially toward the disk; the torque receiving portion The portion includes a pair of projecting portions that extend in the axial direction of the disc through each of the arm portions of the pair of friction pads. Thereby, the arm portion of the friction pad and the pair of protruding portions can be brought into surface contact, and the surface pressure between the two when the braking torque is transmitted can be reduced. Therefore, it is possible to suppress an increase in size of the disc brake.

In addition, the arm portion is formed only on one side of the disc rotating direction of the back plate.

In addition, an end portion on the other side of the disk in the rotation direction of the back plate is supported by the caliper.

Further, an engaging projection protruding toward the disk rotation direction is formed at an end portion of the arm portion, and the engaging projection is oppositely arranged to be able to abut against a radial outer side surface of the disk of the protruding portion. .

The base portion and the pair of protruding portions are formed by one member, and the pair of protruding portions are formed by bending the base portion.

In addition, since the pair of protruding portions are connected to each other at the tip ends of the protruding portions, the pair of protruding portions can increase the strength by connecting to the other protruding portion when receiving the braking torque respectively. Therefore, the increase in size of the disc brake can be further suppressed.

Claims (6)

A disc brake is a disc brake having a vehicle, a pair of friction pads and a caliper. The vehicle is fixed to a non-rotating part of a vehicle. The pair of friction pads are supported by the vehicle to be able to slide and The calipers are oppositely arranged on both sides of the disc. The caliper has a piston for pressing one of the pair of friction pads and is supported by the carrier so as to be slidable. The feature is that the pair of friction pads, The backing plate is provided with a backing material and a backing plate to which the backing material can be attached; at the end side of the disk rotation direction of the backing plate, an arm portion protruding radially toward the disk is formed; in the aforementioned carrier, A torque receiving portion that is mounted on the base portion of the non-rotating portion and extends from the end of the disc in the direction of rotation of the base portion to the disk and extends axially toward the disk is formed; A pair of projecting portions extending in the axial direction of the disc are provided through each of the arm portions of the pair of friction pads. The disc brake according to item 1 of the scope of patent application, wherein the arm portion is formed only on one side of the disc rotation direction of the back plate. The disc brake according to item 1 or 2 of the scope of patent application, wherein the end on the other side of the disc in the rotation direction of the back plate is supported by the caliper. The disc brake according to item 1 or 2 of the scope of patent application, wherein an end of the arm portion is formed with an engaging protrusion protruding toward the disc rotation direction; the engaging protrusion is opposite It is provided so as to be able to abut against the radial outer side surface of the disk of the protruding portion. The disc brake according to item 1 or 2 of the scope of patent application, wherein the base portion and the pair of protruding portions are formed by a member, and the pair of protruding portions are folded to the base portion. Formed by the bend. The disc brake according to item 1 or 2 of the scope of patent application, wherein the pair of projecting portions are connected to each other at the projecting front end sides.