DE112020006321T5 - disc brake - Google Patents

Abstract

This disc brake includes a pair of pads and a caliper main body. In a rotor axial direction, a total length of a pad sliding part on an outside or on an inside and a pad mounting space is shorter than the thickness of two of the pads. When one of the pads is arranged at an end part position in a direction away from the disc rotor in the other of the two pad sliding parts, an end part is provided in one of the pad sliding parts on the disc rotor side at a position where a gap with respect to the pad is longer than a thickness from one of the pads.

Description

[Technical Field]

The present invention relates to a disc brake for braking a vehicle such as a two-wheeled vehicle or a four-wheeled automobile.

This application is based on and claims the benefit of priority from Japanese Patent Application No. 2019-233896 , filed December 25, 2019, the contents of which are incorporated herein by reference.

[Prior Art]

Some disk brakes have a structure in which a space opening in a rotor radial direction is provided in a caliper main body, and pads are arranged in this space (for example, see the following Patent Literature 1).

[list of citations]

[patent literature]

[Patent Literature 1]

Japanese Unexamined Patent Application, First Publication No. 2014-173623

[Summary of the Invention]

[Technical problem]

Disc brakes need to be downsized.

It is therefore an object of the present invention to provide a disc brake which can be downsized.

[The solution of the problem]

In order to achieve the above object, the present invention employs the following aspects.

A disc brake according to a first aspect includes a pair of pads that apply pressure to a disc rotor; and a caliper main body including a pad mounting space that is arranged to extend across the disc rotor and opens in a rotor radial direction, and a pair of pad sliding parts that support the pair of pads on both sides of the pad mounting space in a rotor axial direction so that the pair of pads can slide in the rotor axial direction , having. In the rotor axial direction, a total length of the pad sliding part on an outside or on an inside and the pad mounting space is shorter than the thickness of two of the pads. When one of the pads is arranged at an end part position in a direction away from the disc rotor in the other of the two pad sliding parts, an end part is provided in one of the pad sliding parts on the disc rotor side at a position where a gap with respect to the pad is longer than a thickness from one of the pads.

A disc brake according to a second aspect includes a pair of pads that apply pressure to a disc rotor; and a caliper main body including a pad mounting space that is arranged to extend across the disc rotor and opens in a rotor radial direction, and a pair of pad sliding parts that support the pair of pads on both sides of the pad mounting space in a rotor axial direction so that the pair of pads can slide in the rotor axial direction , having. In the rotor axial direction, a total length of the pad sliding part on an outside or on an inside and the pad mounting space is shorter than the thickness of two of the pads. When one of the pads is arranged at an end part position in a direction away from the disc rotor in the other of the two pad sliding parts, an end part is provided in one of the two pad sliding parts on the disc rotor side at a position where a distance with respect to the pad is longer than one thickness of one of the pads.

[Advantageous Effects of the Invention]

According to the disk brake in each of the foregoing aspects of the present invention, downsizing can be achieved.

character list

• 1 12 is a plan view showing a disc brake according to an embodiment of the present invention.
• 2 Fig. 12 is a view of the disc brake of the same embodiment taken along arrow II in Fig 1 .
• 3 Fig. 13 is a view of the disc brake of the same embodiment taken along arrow III in Fig 1 .
• 4 Fig. 12 is a bottom view showing the disc brake of the same embodiment.
• 5 14 is a cross-sectional view of the disk brake of the same embodiment taken along line VV in FIG 1 .
• 6 is a view of the disc brake of the same embodiment along arrow VI in 1 .
• 7 is a view of the disc brake of the same embodiment along arrow VII in 1 .
• 8th 12 is a plan view showing a relationship between a pad and a main part of a caliper main body in the disc brake of the same embodiment.
• 9 12 is another plan view showing a relationship between the pad and the main part of the caliper main body in the disc brake of the same embodiment.
• 10 12 is another plan view showing a relationship between the pad and the main part of the caliper main body in the disc brake of the same embodiment.

[Description of an embodiment]

An embodiment according to the present invention will be described based on the drawings.

A disc brake 10 of the present invention is an opposed-piston type disc brake used for braking a front wheel of a motorcycle. The present invention is not limited to this. The present embodiment can of course also be applied to, for example, a disc brake for braking a rear wheel of a motorcycle or for braking a four-wheel automobile.

As in the 1 until 7 1, the disc brake 10 of the present embodiment includes a caliper 12 that applies frictional resistance to a disc-shaped disc rotor 11 that rotates together with a wheel (not shown) that is a braking target. The caliper 12 is attached to a vehicle body side.

In the following description, a radial direction of the disc rotor 11 is referred to as a rotor radial direction, a central axis of the disc rotor 11 is referred to as a rotor axis, an extending direction of the rotor axis is referred to as a rotor axial direction, and a rotating direction (circumferential direction) of the disc rotor 11 is referred to as a rotor rotating direction . Also, a leading-in side of the disc rotor 11 in a rotating direction R when a vehicle is moving forward is referred to as a rotor leading-in side, and a trailing-side thereof is referred to as a rotor trailing-out side. Also, a middle side of the disc rotor 11 in the rotor radial direction is referred to as a rotor radial direction inward side, and a side opposite to the center of the disc rotor 11 is referred to as a rotor radial direction outward side. Also, a side opposite to a wheel in the rotor axial direction (outside in a vehicle width direction) is referred to as an outside, and a wheel side (inside in the vehicle width direction) is referred to as an inside.

The caliper 12 has a caliper main body 15 which is arranged to extend over an outer peripheral side of the disc rotor 11 and is fixed to the vehicle body side, a pair of pistons 16 which are accommodated in the caliper main body 15 and each have the same shape as in FIG 4 shown, and a pair of pistons 17 housed in the caliper main body 15 and each having the same shape. The pistons 16 and the pistons 17 each have the same shape. In the pair of pistons 16 and the pair of pistons 17, the center axes lie in the rotor axial direction, respectively, and they are all arranged at positions equidistant from the rotor axis. A line passing through the rotor axis of the disk rotor 11 and the center of the caliper main body 15 in the rotor rotating direction and lying in the rotor radial direction is referred to as a radial direction reference line. The extending direction of this radial direction reference line is referred to as a reference line direction. The radial direction reference line is orthogonal to the rotor axis. The caliper main body 15 has a mirror-symmetrical shape based on a surface including the rotor axis and the radial direction reference line.

In the caliper 12, the two pistons 16 are provided on both sides in the rotor axial direction with respect to the disk rotor 11 so as to be positionally aligned in the rotor radial direction and the rotor rotating direction. Also, in the caliper 12, the two pistons 17 are provided on both sides in the rotor axial direction with respect to the disc rotor 11 so as to be positionally aligned in the rotor radial direction and the rotor rotating direction. The two pistons 16 are provided on a disc outlet side of the pair of pistons 17 . The pair of pistons 16 and the pair of pistons 17 are arranged at positions equidistant from the center of the caliper main body 15 in the rotor rotating direction, in other words, at positions equidistant from the radial direction reference line.

In the caliper 12, on one side of the disk rotor 11 in the rotor axial direction, a piston 16 and a piston 17 are juxtaposed with a predetermined gap therebetween in the Direction of rotor rotation provided. Furthermore, such structures are provided on both sides in the rotor axial direction so as to face each other. Thus, the caliper 12 is a four-piston, opposed-piston type caliper. As for the pistons, at least one pair must be provided with at least the disc rotor 11 interposed therebetween, and three pairs or four pairs may be provided in addition to the above two pairs. Moreover, the number of pistons on both sides of the disk rotor 11 in the rotor axial direction may differ from each other, such as a combination of one and two or a combination of two and three. In addition, the diameters of the pistons on the rotor inlet side and the rotor outlet side can differ from one another.

As in 1 As shown, the caliper main body 15 has an outer cylinder part 21 arranged on the outside of the disc rotor 11 in the rotor axial direction, an inner cylinder part 22 arranged on the inside of the disc rotor 11, a downstream coupling part 23, the end parts of the outer cylinder part 21 and the inner cylinder part 22 on the rotor outlet side, an inlet-side coupling part 24 which couples end parts of the outer cylinder part 21 and the inner cylinder part 22 on the rotor inlet side, and a middle coupling part 25 which couples middle parts of the outer cylinder part 21 and the inner cylinder part 22 couples to each other in the direction of rotor rotation.

The downstream clutch portion 23, the upstream clutch portion 24, and the intermediate clutch portion 25 are all arranged so as to extend across the disk rotor 11 on the outward side in the rotor radial direction. In other words, the caliper main body 15 has a pair of the outlet-side clutch part 23 and the inlet-side clutch part 24 extending over the disc rotor 11, and the outer cylinder part 21 and the inner cylinder part 22 at the end parts of a pair of the outer cylinder part 21 and the couple the inner cylinder part 22 to each other in the direction of rotor rotation, and the middle coupling part 25 which extends over the disk rotor 11 and the pair of the outer cylinder part 21 and the inner cylinder part 22 at middle parts of the pair of the outer cylinder part 21 and the inner cylinder part 22 coupled to each other in the direction of rotor rotation.

The caliper main body 15 is a monobloc caliper in which the outer cylinder part 21, the inner cylinder part 22, the outlet-side coupling part 23, the inlet-side clutch part 24 and the middle clutch part 25 are formed by a one-piece casting. The outer cylinder part 21 and the inner cylinder part 22 are formed by the outlet-side coupling part 23, the inlet-side coupling part 24 and the middle coupling part 25 in one piece.

As in the 6 and 7 As shown, the outer cylinder part 21 is arranged so as to face a surface of the disk rotor 11 on the outside. As in the 1 , 3 and 4 1, the outer cylinder part 21 has an attachment boss part 34, which is arranged on the downstream-side coupling part 23 side, which is one end in the rotor rotating direction, and an attachment boss part 35, which is arranged on the upstream-side coupling part 24 side, which is the other end in the direction of rotation of the rotor.

As in 2 As shown, the outer cylinder portion 21 has an elongated shape in the direction of rotor rotation to accommodate a plurality of pistons 16 and 17 side by side in the direction of rotor rotation. In the outer cylinder part 21, cylinder bores 38 and 39, which accommodate the pistons 16 and 17 so that they can move in the rotor axial direction, are formed side by side at two positions in the rotor rotating direction.

The cylinder bores 38 and 39 each have the same diameter and are formed in the rotor axial direction. In the cylinder bores 38 and 39, the cylinder bore 38 accommodating the pistons 16 is located on the downstream coupling part 23 side in the rotor rotating direction, and the cylinder bore 39 accommodating the pistons 17 is located on the upstream coupling part 24 side in the rotor rotating direction, respectively. In the cylinder bores 38 and 39, the disk rotor 11 side is open, and a side opposite to the disk rotor 11 is blocked in the rotor axial direction. The cylinder bores 38 and 39 are arranged at positions equidistant from the center of the caliper main body 15 in the rotor rotating direction, in other words, at positions equidistant from the radial direction reference line.

As in 1 As shown, an inflow/outflow hole 41 is formed at the center position of the outer cylinder part 21 in the direction of rotation of the rotor. Through the inlet/outlet bore 41, the in 2 Cylinder bores 38 and 39 shown supplied and drained a brake fluid. The inflow/outflow hole 41 is formed parallel to the radial direction reference line.

A mounting hole 44 is formed to penetrate the mounting boss portion 34 in the rotor radial direction. A mounting hole 45 is formed so as to penetrate the mounting boss portion 35 in the rotor radial direction. This montage Holes 44 and 45 are arranged parallel to the radial direction reference line and are formed so that they are positionally aligned with each other in the rotor axial direction at positions equidistant from the center of the caliper main body 15 in the rotor rotating direction, in other words, at positions equidistant from the radial direction reference line. The caliper 12 is of a so-called radial mount type, which is fixed to the vehicle body side of the vehicle with fixing bolts (not shown) inserted through these mounting holes 44 and 45 .

In the outlet-side coupling part 23, a bleeder boss part 49 is formed, to which a bleeder screw 48 for bleeding is attached. The caliper main body 15 is arranged at a rear of the disc rotor 11 in a front-rear direction of the vehicle in a state where the outlet-side clutch part 23 in which this breather boss part 49 is formed is arranged at an upper side in a vertical direction. Therefore, when the vehicle runs forward, the disk rotor 11 moves upward from below in the vertical direction with respect to the caliper main body 15 .

As in the 6 and 7 As shown, the inner cylinder part 22 is arranged to face a surface of the disc rotor 11 on the inside. As in 3 As shown, the inner cylinder part 22 has an elongated shape in the rotor rotating direction to accommodate the plurality of pistons 16 and 17 side by side in the rotor rotating direction. In the inner cylinder part 22, cylinder bores 58 and 59, which accommodate the pistons 16 and 17 so that they can move in the rotor axial direction, are formed side by side at two positions in the rotor rotating direction.

The cylinder bore 58 accommodating the pistons 16 is located on the downstream side coupling part 23 side in the rotor rotating direction. The cylinder bore 59 accommodating the pistons 17 is located on the upstream side coupling part 24 side in the rotor rotating direction. The cylinder bores 58 and 59 are open on the disk rotor 11 side in the rotor axial direction, and a side opposite to the disk rotor 11 is blocked. The cylinder bores 58 and 59 are arranged at positions equidistant from the center of the caliper main body 15 in the rotor rotating direction, in other words, at positions equidistant from the radial direction reference line. The brake fluid is added to the in 2 illustrated cylinder bores 38 and 39 of the outer cylinder part 21 also through the 1 illustrated inlet/outlet bore 41 of the outer cylinder part 21 to or from the in 3 shown cylinder bores 58 and 59 of the inner cylinder part 22 and drained.

In the caliper main body 15 are in the 1 , 2 , 4 and 6 shown outer cylinder part 21 and in the 1 , 3 , 4 and 6 inner cylinder part 22 shown are arranged so as to face each other in the rotor axial direction at positions overlapping each other in the rotor rotating direction and the rotor radial direction. In the 2 shown cylinder bore 38 is in 3 shown cylinder bore 58 formed coaxially. In the 2 shown cylinder bore 39 is in 3 shown cylinder bore 59 formed coaxially.

As in 1 As shown, the downstream clutch part 23 has a lining sliding part 32A, a lining sliding part 33B and a supporting clutch part 51 on the side of the leading-side clutch part 24 in the rotor rotating direction. The pad sliding part 32A is arranged on the outside of the disc rotor 11 . The pad sliding part 33B is arranged on the inside of the disc rotor 11 . The supporting clutch part 51 is arranged between the pad sliding part 32A and the pad sliding part 33B so that they are connected to each other. The pad sliding part 32A and the pad sliding part 33B have mirror-symmetrical shapes.

The upstream-side clutch part 24 has a pad sliding part 32B and a lining sliding part 33A on the downstream-side clutch part 23 side thereof in the rotor rotating direction. The pad sliding part 33</b>A is arranged on the outside of the disk rotor 11 . The pad sliding part 32B is arranged on the inside of the disc rotor 11 . The pad sliding part 33A and the pad sliding part 32B have mirror-symmetrical shapes. In the caliper main body 15, a part between the pad sliding part 33A and the pad sliding part 33B serves as a pad mounting space 52 penetrating it in the rotor radial direction. The pad mounting space 52 is open on the outward side and the inward side in the rotor radial direction and on the rotor run-out side. In other words, the caliper main body 15 includes a pair of pad sliding parts 33A and 32B on both sides of the pad mounting space 52 in the rotor axial direction.

At the downstream clutch part 23, the lining sliding parts 32A and 33B are on both sides of the disk rotor 11 in the rotor axial direction. In the upstream clutch part 24, the lining sliding parts 32B and 33A are on both sides of the disc rotor 11 in the rotor axial direction. In other words, the pad sliding parts 32A, 33B, 32B and 33A at four places are provided in the downstream-side clutch part 23 and the upstream-side clutch part 24 . In addition, it has expired side coupling part 23 connects the supporting coupling part 51 at a position overlapping the disk rotor 11 in the rotor axial direction. The upstream-side clutch part 24 has the pad mounting space 52 at a position overlapping the disk rotor 11 in the rotor axial direction. In the caliper main body 15, the pad sliding parts 32A and 33B and the supporting clutch part 51 are arranged on the rotor outlet side of the pad sliding parts 32B and 33A.

The lining sliding part 32A, the supporting clutch part 51 and the lining sliding part 33B continue in the rotor axial direction at positions overlapping each other in the rotor rotating direction and the rotor radial direction. The pad sliding part 33A and the pad sliding part 32B face each other in the rotor axial direction at positions overlapping each other in the rotor rotating direction and the rotor radial direction. As in 4 As shown, the disk rotor 11 is disposed between the pad sliding portion 32A and the pad sliding portion 33A and the pad sliding portion 32B and the pad sliding portion 33B. The clutch supporting part 51 connects the pad sliding part 32A and the pad sliding part 33B to each other on the outward side of the disk rotor 11 in the rotor radial direction. The pad mounting space 52 is arranged between the pad sliding part 32B and the pad sliding part 33A on the outward side of the disk rotor 11 in the rotor radial direction.

In the caliper main body 15, a pad arrangement space 61 is arranged, which is open on both sides in the rotor radial direction and surrounded by the outer cylinder part 21, the inner cylinder part 22, the pad sliding parts 32A, 32B, 33A and 33B, and the supporting clutch part 51 is substantially trained in the middle. The pad arrangement space 61 is fully open to the inboard side in the rotor radial direction. As in 1 As shown, the center clutch part 25 is provided at the center position of the caliper main body 15 in the rotor rotating direction. The middle clutch part 25 is provided extending across the pad arrangement space 61 in the rotor axial direction on the outward side thereof in the rotor radial direction. Therefore, on the outward side of the pad arrangement space 61 in the rotor radial direction, a part between the pad sliding parts 32A and 33B and the supporting clutch part 51 on the rotor outlet side and the middle clutch part 25; and a part between the pad sliding parts 33A and 32B on the rotor inlet side and the middle clutch part 25 is open.

The pad mounting space 52 between the pad sliding part 33A and the pad sliding part 32B is open in the pad arrangement space 61 and communicates with the pad arrangement space 61 . The pad mounting space 52 has a shape recessed toward the rotor upstream side from the center of the pad arrangement space 61 in the rotor axial direction. The in the 2 and 3 The cylinder bores 38, 39, 58 and 59 shown are in the 4 pad arrangement space 61 shown open. In the rotor rotating direction, the disk rotor 11 traverses the center position of the pad arrangement space 61 in the rotor axial direction.

Here, in the caliper main body 15, the outer cylinder part 21, the inner cylinder part 22, the outlet-side clutch part 23, the inlet-side clutch part 24 and the middle clutch part 25, in 1 shown, with the exception of in 3 illustrated lower parts of the cylinder bores 58 and 59 of the inner cylinder part 22 are integrally formed by casting. Furthermore, inner surfaces of the cylinder bores 38, 39, 58 and 59 are subjected to machining via casting opening parts in the lower parts of these cylinder bores 58 and 59 at two places in the inner cylinder part 22. Thereafter, the opening parts are blocked and the bottom parts are formed by attaching a separate block member to the opening parts in the bottom parts of the cylinder bores 58 and 59 of the inner cylinder part 22 by stir rubbing and joining, thereby forming the caliper main body 15. The outer cylinder portion 21, the inner cylinder portion 22, the downstream coupling portion 23, the upstream coupling portion 24 and the central coupling portion 25 can be integrally formed as a whole by casting. In addition, the inner surfaces of the cylinder bores 38, 39, 58 and 59 can be subjected to machining from the pad arrangement space 61 between the outer cylinder part 21 and the inner cylinder part 22.

As in 5 1, in the pad sliding part 32B of the oncoming-side clutch part 24, on the inside, are a torque receiving surface 71B that faces the lining arrangement space 61-side, a rotor-facing surface 72B that faces the disc rotor 11-side, and an engaging surface part 73B that faces the after outward side in the rotor radial direction and opposed to the rotor outlet side. The torque receiving surface 71B is a flat surface that extends parallel to the radial direction reference line, and also extends parallel to the rotor axis. The torque-receiving surface 71B forms the pad locating space 61. The rotor-facing surface 72B forms the pad-mounting space 52. The rotor-facing surface 72B extends perpendicular to the rotor axis. The engagement surface part 73B is a flat surface that extends parallel to the rotor axis and extends away from the radial direction reference line toward the outward side in the rotor radial direction in the reference line direction tends. The engagement surface portion 73B and the torque receiving surface 71B intersect at an obtuse angle.

In the upstream-side clutch part 24, there is formed a wall surface part 74B standing up outward in the rotor radial direction and toward the rotor outlet side from an end edge part of the engagement surface part 73B on the inside. The wall surface portion 74B extends almost orthogonally to the rotor axis.

In the supporting clutch part 51 of the downstream clutch part 23, an engagement surface part 53 is formed, which is opposite to the outward side in the rotor radial direction and the rotor inlet side. The engagement surface part 53 is a flat surface that extends parallel to the rotor axis and inclines away from the radial direction reference line toward the outward side in the rotor radial direction in the reference line direction.

As in 4 As shown, in the pad sliding portion 33B of the downstream clutch portion 23, a torque receiving surface 81B facing the pad arrangement space 61 side and a rotor facing surface 82B facing the disk rotor 11 side are formed on the inside. Also, in the pad sliding part 33B, as shown in FIG 1 1, an engaging surface part 83B opposite to the outward side in the rotor radial direction is formed. In the 5 The illustrated torque receiving surface 81B is a flat surface that extends parallel to the radial direction reference line, and also extends parallel to the rotor axis. The torque receiving surface 81B forms the pad arrangement space 61. The in 1 The engagement surface part 83B shown is arranged on the same plane as the engagement surface part 53 of the supporting clutch part 51 . The engagement surface portion 83B is therefore also a flat surface that extends parallel to the rotor axis, faces the outward side in the rotor radial direction and the rotor inlet side, and diverges away from the radial direction reference line toward the outward side in the rotor radial direction inclined in the reference line direction. The engagement surface portion 83B and the torque receiving surface 81B intersect at an obtuse angle. This intersection angle is equivalent to the angle formed by the engagement surface portion 73B and the torque receiving surface 71B.

In the downstream clutch part 23, there is formed a wall surface part 84B standing up outward in the rotor radial direction from an end edge part of the engagement surface part 83B on the inside. The wall surface portion 84B extends almost orthogonally to the rotor axis.

In the caliper main body 15, between the pad sliding parts 32B and 33B on the inner side, a middle wall surface part 86B opposed to the pad arrangement space 61 side is formed. The intermediate wall surface part 86B has a planar shape extending orthogonally to the rotor axis and forms the pad arrangement space 61.

In the pad sliding part 33A on the outside of the input-side clutch part 24 are a torque receiving surface 81A facing the pad arrangement space 61 side, a rotor-facing surface 82A facing the disc rotor 11 side, and an engaging surface part 83A facing the outward Opposite side in the rotor radial direction is formed.

The torque receiving surface 81A is a flat surface that extends parallel to the radial direction reference line, and also extends parallel to the rotor axis. The torque-receiving surface 81A forms the pad-arranging space 61. The rotor-facing surface 82A forms the pad-mounting space 52. The torque-receiving surface 81A is arranged on the same plane as the torque-receiving surface 71B. The rotor-facing surface 82A extends perpendicular to the rotor axis. The engaging surface part 83A is a flat surface extending parallel to the rotor axis and is arranged on the same plane as the engaging surface part 73B. Therefore, the engagement surface part 83A also faces the outward side in the rotor radial direction and the rotor outlet side, and inclines away from the radial direction reference line toward the outward side in the rotor radial direction in the reference line direction. The engagement surface portion 83A and the torque receiving surface 81A intersect at an obtuse angle. This intersection angle is equivalent to the angle formed by the engagement surface portion 73B and the torque receiving surface 71B.

In the upstream-side clutch part 24, there is formed a wall surface part 84A standing up outward in the rotor radial direction and toward the rotor outlet side from an end edge part of the engagement surface part 83A on the outside. The wall surface portion 84A extends almost orthogonally to the rotor axis and faces the wall surface portion 74B.

The rotor-facing surface 82A and the rotor-facing surface 72B face each other in the rotor axial direction so as to be opposite in the rotor radial direction and the rotor Rotor rotation are aligned positionally. In the upstream clutch member 24, an intermediate surface 88 forming the pad mounting space 52 is formed between the rotor-facing surface 82A and the rotor-facing surface 72B. The interface 88 is a flat surface that extends parallel to the radial direction reference line and also extends parallel to the rotor axis.

As in 4 As shown, in the pad sliding part 32A on the outer side of the downstream clutch part 23, a torque receiving surface 71A facing the pad arrangement space 61 side and a rotor facing surface 72A facing the disc rotor 11 side are formed. In addition, in the lining sliding part 32A, as in 1 1, an engaging surface part 73A opposite to the outward side in the rotor radial direction is formed. The torque receiving surface 71A is a flat surface that extends parallel to the radial direction reference line, and also extends parallel to the rotor axis. The torque receiving surface 71A is arranged on the same plane as the torque receiving surface 81B. The torque receiving surface 71A forms the pad arrangement space 61. The engaging surface part 73A is arranged on the same plane as the engaging surface part 53 and the engaging surface part 83B. Therefore, the engaging surface portion 73A is a flat surface extending parallel to the rotor axis. The engagement surface part 73A faces the outward side in the rotor radial direction and the rotor inlet side, and is inclined away from the radial direction reference line toward the outward side in the rotor radial direction in the reference line direction. The engagement surface portion 73A and the torque receiving surface 71A intersect at an obtuse angle. This intersection angle is an angle equivalent to the angle formed by the engagement surface portion 73B and the torque receiving surface 71B.

In the downstream clutch part 23, there is formed a wall surface part 74A that stands up outward in the rotor radial direction and toward the rotor inlet side from an end edge part of the engagement surface part 73A on the outside. The wall surface portion 74A extends almost orthogonally to the rotor axis and faces the wall surface portion 84B.

In the caliper main body 15, between the pad sliding parts 32A and 33A on the outside, a middle wall surface part 86A opposing the pad arrangement space 61 side is formed. The middle wall surface part 86A has a planar shape extending orthogonally to the rotor axis, and forms the pad arrangement space 61. The middle wall surface part 86A is positionally aligned with the middle wall surface part 86B in the rotor radial direction and the rotor rotating direction, and they face each other in the rotor axial direction.

In the caliper main body 15, a pad spring 101 is engaged with and attached to the center clutch part 25. As shown in FIG. The caliper main body 15 supports, by means of this pad spring 101, a pair of the pads 102 each having the same shape. These pads 102 are arranged to face the disc rotor 11 . A lining 102 is arranged between the outer cylinder part 21 and the disk rotor 11 . The other lining 102 is arranged between the inner cylinder part 22 and the disk rotor 11 .

The pad spring 101 is made of a plate material having a uniform plate thickness by punching and bending by press working. The pad spring 101 has a base plate portion 111, an engaging plate portion 112, an engaging plate portion 113, in 5 shown, a pair of extension plate parts 114 and 115, in 1 shown, a pair of extension plate parts 116 and 117, a clutch plate part 118 and a clutch plate part 119.

the inside 5 The base plate part 111 shown is arranged between the middle clutch part 25 and the pair of pads 102 and lies against the middle clutch part 25 . The engagement plate part 112 extends outward in the rotor radial direction from an end edge part of the base plate part 111 on the rotor outlet side, and engages with the middle clutch part 25 . The engagement plate part 113 extends outward in the rotor radial direction from the end edge part of the base plate part 111 on the rotor inlet side, and engages with the middle clutch part 25 . Accordingly, the engaging plate parts 112 and 113 sandwich the middle clutch part 25 therebetween. Thereby, the pad spring 101 is attached to the caliper main body 15 .

This in 1 The pair of rotor outlet side extension plate members 114 and 115 shown extends from the Fig 5 illustrated end edge part of the base plate part 111 on the rotor outlet side to the rotor outlet side. As in 1 As shown, the clutch plate portion 118 couples tip portions of the extension plate portions 114 and 115 together on the rotor outlet side. The extension plate parts 114 and 115 are arranged on both sides of the engagement plate part 112 in the rotor axial direction. As in 5 shown, the extension plate portions 114 and 115 and the clutch plate portion 118 are bent so that the roto outlet side protrudes inward in the rotor radial direction.

This in 1 The pair of rotor inlet side extension plate members 116 and 117 shown extends from the in 5 illustrated end edge part of the base plate part 111 on the rotor inlet side to the rotor inlet side. As in 1 As shown, the coupling plate part 119 couples tip parts of the extension plate parts 116 and 117 together on the rotor inlet side. The extension plate parts 116 and 117 are arranged on both sides of the engagement plate part 113 in the rotor axial direction.

In the pad spring 101, the extension plate parts 114 and 116 on the outside abut the pad 102 on the outside and press the same in the rotor radial direction. At this time, the extension plate part 114 on the rotor outlet side also pressurizes the lining 102 on the outside toward the rotor outlet side. In the pad spring 101, the extension plate parts 115 and 117 on the inside abut the pad 102 on the inside and press the same inward in the rotor radial direction. At this time, the extension plate part 115 on the rotor outlet side also pressurizes the lining 102 on the inside toward the rotor outlet side.

The two pads 102 are unitary components each having the same shape. As in 5 As shown, the pads 102 each have a back plate 121 elongated in the rotor rotating direction, and a pad material 122 having a planar shape pasted on an adhesive surface 125 on one side of the back plate 121 in a thickness direction. The pads 102 are biased by the pad spring 101 and supported by the caliper main body 15 in the back plates 121 and come into contact with the disc rotor 11 and apply braking force to the vehicle and in the pad materials 122 .

As in 4 As shown, pressure is applied to the pads 102 by the pistons 16 and 17 on back surfaces 126 having planar shapes at positions on a side opposite to the adhesive surfaces 125 of the backing plates 121 . The pads 102 come into contact with the disc rotor 11 at tip surfaces 127 having planar shapes at positions on an opposite side to the back plates 121 of the pad materials 122 . The tip surfaces 127 of the facing materials 122 are planar surfaces that are parallel to the bonding surfaces 125 of the backing plates 121 and the rear surfaces 126 . As in 5 1, in the lining materials 122, side surfaces 128 on both sides in the direction of rotor rotation have planar surfaces and are parallel to each other. The side surfaces 128 on both sides are perpendicular to the adhesive surfaces 125 of the back panels 121 .

The back plates 121 have a uniform plate thickness and each have a main plate part 130 to which the lining material 122 is adhered, and a pair of extension parts 131 and 132 extending from both end sides in the rotor rotating direction on the outward side of the main plate part 130 in the rotor radial direction extend to both outward sides. The main plate part 130 has a substantially rectangular shape elongated in the rotor rotating direction, and the extension parts 131 and 132 extend in a direction inclined with respect to a longitudinal direction of the main plate part 130 from both end part sides in the rotor rotating direction, that is, both sides of the Main plate part 130 in the longitudinal direction. The longitudinal direction of the main plate part 130 is the longitudinal direction of the back plate 121 and is the longitudinal direction of the pad 102. In the back plate 121, therefore, the two extension parts 131 and 132 extending in a direction inclined with respect to the longitudinal direction of the pad 102 are on both End part sides in the rotor rotating direction and the outward side in the rotor radial direction are formed. In the back plate 121, the main plate part 130 has a mirror-symmetrical outer shape, and the extension parts 131 and 132 have mirror-symmetrical shapes.

An extension part 131 extends in a direction away from the main plate part 130 in the longitudinal direction of the main plate part 130 from an end part side of the main plate part 130 in the rotor rotating direction and the outward side in the rotor radial direction. The one extension part 131 is inclined to be positioned on the outward side in the rotor radial direction in the reference line direction toward an extended tip side.

The other extension part 132 extends in a direction away from the main plate part 130 in the longitudinal direction of the main plate part 130 from the other end part side of the main plate part 130 in the rotor rotating direction and the outward side in the rotor radial direction. The other extension part 132 is inclined to be positioned on the outward side in the rotor radial direction in the reference line direction toward an extended tip side.

The main plate part 130 has a side surface part 141 which is a flat surface perpendicular to the longitudinal direction of the main plate part 130 on one side in the longitudinal direction at a proxi mal part of the extension part 131 extends. In addition, the main plate part 130 has a side surface part 142 which is a flat surface extending perpendicularly to the longitudinal direction of the main plate part 130 on the other side in the longitudinal direction at a proximal position of the extension part 132 . The main plate part 130 has an outer surface part 143 which is a curved surface curved so as to protrude toward the outward side in the rotor radial direction on the outward side in the rotor radial direction. The side surface parts 141 and 142 and the outer surface part 143 are all flat surfaces extending in the plate thickness direction of the back plate 121 . The side surface parts 141 and 142 are parallel to each other and are also parallel to a pair of side surfaces 128 of the lining material 122 .

The extension part 131 extends from between the side surface part 141 and the outer surface part 143. The extension part 131 has a substantially rhombic shape when the back plate 121 is viewed in the plate thickness direction. The extension part 131 has a surface part 151 which is on the outward side in the rotor rotating direction and is opposite to the inward side in the rotor radial direction and the outward side in the rotor rotating direction, a surface part 152 which is on the inward side side in the rotor rotating direction and is opposite to the outward side in the rotor radial direction and the inward side in the rotor rotating direction, and a surface part 153 which is located on the outward side in the rotor radial direction and the outward side in the Rotor radial direction opposite. The surface parts 151, 152 and 153 are all flat surfaces extending in the plate thickness direction of the back plate 121 and extending in the rotor axial direction.

The surface part 151 is tilted with respect to the longitudinal direction of the pad 102 and the reference line direction from the end edge part side of the side surface part 141 on the outward side in the rotor radial direction and extends to the outward side in the rotor radial direction and the outward side in the direction of rotation of the rotor. The surface part 151 and the side surface part 141 form an obtuse angle. The angle formed by the surface portion 151 and the side surface portion 141 is an angle equivalent to the angle formed by the engagement surface portion 73B of the pad sliding portion 32B and the torque receiving surface 71B. The surface part 152 is inclined with respect to the longitudinal direction of the pad 102 and the reference line direction from the end edge part of the outer surface part 143 on the side surface part 141 side in the rotor rotating direction and extends to the outward side in the rotor radial direction and the outward side in the direction of rotor rotation. The surface part 152 extends substantially parallel to the surface part 151. The surface part 153 connects the end edge part of the surface part 151 on a side opposite to the side surface part 141 and the end edge part of the surface part 152 on a side opposite to the outer surface part 143. with each other and extends perpendicularly to the side surface part 141. The surface part 151 and the surface part 153 form an acute angle and the surface part 152 and the surface part 153 form an obtuse angle.

The extension part 132 extends from between the side surface part 142 and the outer surface part 143. The extension part 132 has a substantially rhombic shape when the back plate 121 is viewed in the plate thickness direction. The extension portion 132 has a surface portion 161 located on the outward side in the rotor rotating direction and opposed to the inward side in the rotor radial direction and the outward side in the rotor rotating direction, a surface portion 162 located on the inward facing side in the rotor rotating direction and facing the outward side in the rotor radial direction and the inward side in the rotor rotating direction, and a surface portion 163 located on the outward side in the rotor radial direction and the outward side in opposite to the rotor radial direction. The surface parts 161, 162 and 163 are all flat surfaces extending in the plate thickness direction of the back plate 121 and extending in the rotor axial direction.

The surface part 161 is tilted with respect to the longitudinal direction of the pad 102 and the reference line direction from the end edge part side of the side surface part 142 on the outward side in the rotor radial direction and extends to the outward side in the rotor radial direction and the outward side in the direction of rotation of the rotor. The surface part 161 and the side surface part 142 form an obtuse angle. The angle formed by the surface part 161 and the side surface part 142 is an angle that is equivalent to the angle formed by the surface part 151 and the side surface part 141 . The surface part 162 is tilted with respect to the longitudinal direction of the pad 102 and the reference line direction from the end edge part of the outer surface part 143 on the side surface part 142 side in the rotor rotating direction and extends toward the outward side in the rotor radial direction and the outward side in the rotor rotating direction. The surface part 162 extends substantially parallel to the surface part 161. The surface part 163 connects the end edge part of the surface part 161 on a side opposite to the side surface part 142 and the end edge part of the surface part 162 on a side opposite to the outer surface part 143. with each other and extends perpendicularly to the side surface part 142. The surface part 161 and the surface part 163 form an acute angle. The surface part 162 and the surface part 163 form an obtuse angle. The surface part 163 is arranged in the same plane as the surface part 153 .

As in 1 As illustrated, the pad materials 122 are arranged on the outside with respect to the back plates 121 when the pads 102 are arranged on the inside of the pad arrangement space 61 of the caliper main body 15 . Furthermore, as in 5 1, while the extension parts 131 and 132 are in positions located in the end parts on the outward side in the rotor radial direction, the extension part 131 is supported by the pad sliding part 32B on the rotor inlet side, and the extension part 132 is supported by the pad sliding part 33B on the Rotor outlet side worn.

At this time, with the pads 102 arranged on the inside, the extension part 132 arranged on the rotor outlet side abuts the extension plate part 115 of the pad spring 101 in the surface part 162 and becomes from the extension plate part 117 to the inward side in the rotor radial direction and pressed towards the rotor outlet side. In addition, the extension part 132 comes at the engaging surface part 83B (in 1 shown) of the lining sliding part 33B in the surface part 161 in abutment. In addition, these rubbers come with 102, as in 5 As illustrated, the extension part 131 on the rotor inlet side abuts the extension plate part 117 of the pad spring 101 in the surface part 153 and is pushed by the extension plate part 117 toward the inward side in the rotor radial direction. In addition, the extension part 131 abuts on the engaging surface part 73B of the pad sliding part 32B in the surface part 151 .

In a state where only a biasing force of the pad spring 101 is received, the pads 102 arranged on the inside cause the side surface parts 142 of the main plate parts 130 to directly abut against the torque receiving surface 81B on the opposite inside and the rotor outlet side so that they come into surface contact with each other due to the biasing force of the pad spring 101 . In addition, the surface part 161 of the extension part 132 is caused to be directly attached to the engagement surface part 83B (see 1 ) on the opposite inner side and the rotor outlet side so that they come into surface contact with each other. In addition, it is effected as in 5 It is shown that the surface part 151 of the extension part 131 directly abuts the engagement surface part 73B on the opposite inner side and the rotor inlet side so that they come into surface contact with each other.

In the caliper main body 15 in this state, at the pad sliding part 32B on the inside, the engaging surface part 73B extends in the extending direction of the extension part 131 of the pad 102 on the inside. In the pad 102 on the inside, the extension part 131 is engaged with the pad sliding part 32B on the inside. In the caliper main body 15 in this state, at the pad sliding part 33B on the inside, the engaging surface part 83B (in 1 shown) in the extension direction of the extension part 132 of the pad 102 on the inside. In the pad 102 on the inside, the extension part 132 is engaged with the pad sliding part 33B on the inside. In addition, in this state, as in 5 As shown, this pad 102 on the inside causes the side surface portion 142 of the main plate portion 130 to abut the torque receiving surface 81B, and causes the side surface portion 141 of the main plate portion 130 to face the torque receiving surface 71B with a small amount of clearance therebetween. Moreover, in this state, in the lining 102 on the inside, the extension parts 131 and 132 are arranged on the outward side in the rotor radial direction from the outermost periphery of the disc rotor 11 .

As in 1 As illustrated, when the pads 102 are mounted on the outside of the pad arrangement space 61 of the caliper main body 15, the pad materials 122 are arranged on the inside with respect to the backing plates 121, and the extension parts 131 and 132 are arranged on the outward side in the rotor radial direction . In this position, the extension portion 131 is supported by the pad sliding portion 32A on the rotor downstream side, and the extension portion 132 is supported by the pad sliding portion 33A on the rotor upstream side.

At this time, with the pads 102 arranged on this outer side, the extension part 131, which is arranged on the rotor outlet side, abuts against the extension plate part 114 of the pad spring 101 in the surface part 152 and is separated from the extension plate part 114 is pushed toward the inward side in the rotor radial direction and the rotor outlet side. As a result, the extension part 131 at the engaging surface part 73A of the pad sliding part 32A is in the surface part 151 (see 5 ) engaged.

Also, in the pads 102, the extension part 132 on the rotor inlet side abuts the extension plate part 116 of the pad spring 101 in the surface part 163 and is pushed by the extension plate part 116 toward the inward side in the rotor radial direction. As a result, the extension part 132 abuts against the engaging surface part 83A of the pad sliding part 33A in the surface part 161 (see 5 ).

In a state where only a biasing force of the pad spring 101 is received, the pads 102 arranged on the outside cause the side surface part 141 (see FIG 5 ) of the main plate part 130 directly abuts against the torque receiving surface 71A on the opposite outer side and the rotor outlet side so that they come into surface contact with each other due to the biasing force of the pad spring 101 . As a result, the surface portion 151 (see 5 ) of the extension part 131 directly abuts against the engagement surface part 73A on the opposite outer side and the rotor outlet side so that they come into surface contact with each other, and the surface part 161 (see 5 ) of the extension part 132 directly abuts the engagement surface part 83A on the opposite outer side and the rotor inlet side so that they come into surface contact with each other.

In the caliper main body 15 in this state, at the pad sliding part 32A on the outside, the engaging surface part 73A extends in the extending direction of the extension part 131 of the pad 102 on the outside. Further, in this pad 102 on the outside, the extension part 131 is engaged with the pad sliding part 32A on the outside. Also, in the caliper main body 15 in this state, at the pad sliding part 33A on the outside, the engaging surface part 83A extends in the extending direction of the extension part 132 of the pad 102 on the outside. Further, in this pad 102 on the outside, the extension part 132 is engaged with the pad sliding part 33A on the outside. In this state, the lining 102 on the outside causes the side surface part 141 (see 5 ) of the main plate part 130 abuts against the torque receiving surface 71A, and causes the side surface part 142 (see 5 ) of the main plate part 130 faces the torque receiving surface 81A with a small clearance therebetween. Moreover, in this state, in the lining 102 on the outside, the extending parts 131 and 132 are arranged on the outward side in the rotor radial direction from the outermost periphery of the disc rotor 11 .

As above, a pair of pads 102 is slidably engaged with a caliper main body 15 .

the inside 5 The illustrated inner side pad 102 is supported by the inner side pad sliding parts 32B and 33B of the caliper main body 15 and moves in the rotor axial direction. At this time, the pad sliding parts 32B and 33B bring the extension parts 131 and 132 of the pad 102 on the inside into the engaging surface part 73B and the engaging surface part 83B (in 1 shown) arranged in a V-shape on both sides in the rotor rotating direction. In the caliper main body 15, therefore, the inside-side pad sliding parts 32B and 33B support the inside-side pad 102 so that they can slide in the rotor axial direction.

the inside 1 The illustrated outside pad 102 is supported by the pad sliding parts 32A and 33A of the outside caliper main body 15 and moves in the rotor axial direction. At this time, the pad sliding parts 32A and 33A engage the extending parts 131 and 132 of the pad 102 on the outside in the engaging surface parts 73A and 83A arranged in a V-shape on both sides in the rotor rotating direction. In the caliper main body 15, therefore, the outside pad sliding parts 32A and 33A support the outside pad 102 so that they can slide in the rotor axial direction.

As described above, the caliper 12 has a so-called pad-boltless structure that supports the pair of pads 102 by the caliper main body 15 without a pad pin for supporting the pair of pads 102 .

In the disc brake 10 described above, a brake fluid via the in 1 illustrated inlet / outlet bore 41 in the cylinder bores 38, 39, 58, and 59 of the outer cylinder part 21 and the inner cylinder part 22, in the 2 and 3 are shown introduced. Consequently, the pair of pistons 16 and the pair of pistons 17 moving in 4 are shown, due to a fluid pressure of the brake fluid in a direction of the disc rotor 11. Consequently, two pistons 16 and 17 provided in the outer cylinder part 21 pressurize the pad 102 on the outside provided between the outer cylinder part 21 and the disc rotor 11 and press its lining material 122 against the disc rotor 11. Also apply two pistons 16 and 17 provided in the inner cylinder part 22 pressurize the lining 102 on the inside provided between the inner cylinder part 22 and the disc rotor 11 and press its lining material 122 to the disc rotor 11 . Accordingly, the pair of pads 102 pressurizes the disc rotor 11 and generates braking force for the vehicle.

At this time, the pair of pads 102 are engaged with the caliper main body 15 so that inward movement in the rotor radial direction and in the rotor rotating direction is restricted by the pad sliding parts 32A, 33A, 32B and 33B, and therefore they move in the rotor axial direction.

When moving in the rotor axial direction, as in 1 1, the inside pad 102 moves while being supported by the inside pad sliding parts 32B and 33B in the extending parts 131 and 132. As shown in FIG. At this time, the extension part 132 slides in the engaging surface part 83B of the pad sliding part 33B in the surface part 161, and the extension part 131 slides in the engaging surface part 73B of the pad sliding part 32B in the surface part 151. When moving in the rotor axial direction, the lining 102 moves on the outside while being connected to the pad sliding parts 32A and 33A on the outside in the extension parts 131 and 132 is engaged. At this time, the extension part 131 slides in the engaging surface part 73A of the pad sliding part 32A in the surface part 151 and the extension part 132 slides in the engaging surface part 83A of the pad sliding part 33A in the surface part 161. In this way, the caliper main body 15 including the pad sliding parts 32A, 33A, 32B and 33B , the pads 102 are engaged so that they can move in the rotor axial direction.

When braking while the vehicle is moving forward, the two pads 102 engage the disc rotor 11 in the pad materials 122 and move to the rotor run-out side. Consequently, the covering 102, as in 4 shown, abutted on the inside against the torque receiving surface 81B of the pad sliding part 33B on the rotor outlet side in the side surface part 142 of the back plate 121 . Furthermore, the pad 102 on the outside abuts against the torque receiving surface 71A of the pad sliding part 32A on the rotor outlet side in the side surface part 141 of the back plate 121 . Accordingly, the caliper main body 15 mainly receives braking torque in the pad sliding parts 32A and 33B.

When braking during backward movement of the vehicle, both pads 102 come into contact with the disc rotor 11 in the lining material 122 and move to the rotor run-out side during backward movement. Consequently, the pad 102 abuts the torque receiving surface 71B of the pad sliding part 32B in the side surface part 141 of the back plate 121 on the inside. In addition, the pad 102 abuts the torque receiving surface 81A of the pad sliding part 33A in the side surface part 142 of the back plate 121 on the outside. Accordingly, the caliper main body 15 mainly receives braking torque in the pad sliding parts 32B and 33A.

As in 1 1, in the caliper main body 15, the clutch middle part 25 extending over the middle part of the pad arrangement space 61 in the rotor rotating direction in the rotor axial direction is provided on the outward side of the pad arrangement space 61 in the rotor radial direction. For this reason, when the pair of pads 102 is assembled in the caliper main body 15, the assembly cannot be performed from the outward side in the rotor radial direction due to unwanted component contact, and is therefore assembled from the inward side in the rotor radial direction. Furthermore, the size and shape of the pad arrangement space 61 and the pad mounting space 52 do not allow two pads 102 to be mounted together in the caliper main body 15 . For this reason, the two pads 102 are successively assembled in the caliper main body 15 from the inward side in the rotor radial direction.

For example, the pad 102 on the outside in a brand-new condition is first mounted in the pad sliding parts 32A and 33A on the outside, and then the pad 102 on the inside in a brand-new condition is mounted in the pad sliding parts 32B and 33B on the inside. At this time, with respect to the pad 102 to be mounted first on the outside, the extension parts 131 and 132 can cross the pad sliding parts 32A and 33A outward in the rotor radial direction by causing the extension part 132 to pass through the pad mounting space 52, and so it becomes mounted in the pad sliding parts 32A and 33A.

Besides, the caliper main body 15 of the present embodiment is downsized in the rotor axial direction. Therefore, in the pad arrangement space 61 and the pad mounting space 52, even in a state where the previously attached pad 102 is brought close to the outermost side in a brand-new state on the outside, in other words, as in FIG 8th shown, even in a condition in which the rear surface 126 is caused to spin plate 121 of this pad 102 on the outside abuts against the middle wall surface part 86A so that they come into surface contact with each other, are not mounted in the caliper main body 15. That is, in a state where the tip face 127 of the inside-side pad 102 in a brand-new state is brought into surface contact with the tip face 127 of the outside-side pad 102 and placed parallel to the outside-side pad 102, cannot be mounted in the caliper main body 15. 8th 14 is a view of a part near the pad arrangement space 61 of the caliper main body 15 viewed from the outward side in the rotor radial direction in a direction of the radial direction reference line.

That is, in the caliper main body 15, in a state where the pad 102 on the outside in a brand-new condition is first assembled in the pad sliding parts 32A and 33A on the outside, and is positioned at an end position on the outermost side, even if the pad 102 on the inside in a brand new state is moved in the rotor radial direction while its tip face 127 is brought into surface contact with the tip face 127 of the pad 102 on the outside, this of the pad sliding parts 32A, 32B, 33A and 33B and the supporting clutch part 51, forming the pad mounting space 52 and the pad arranging space 61 is inhibited. Specifically, after the extension part 132 of the pad 102 is placed on the inside on the outward side in the rotor radial direction of the pad sliding part 33B and the clutch supporting part 51 even if the extension part 131 is caused to pass through the pad mounting space 52 and overlaps the Pad sliding part 32B traversed in the rotor radial direction as in FIG 8th As illustrated, the extension part 131 positions the pad sliding part 32B in the rotor rotating direction and the rotor axial direction, thereby causing undesired component contact. Therefore, the extension part 131 cannot cross the pad sliding part 32B in the rotor radial direction.

In addition, contrary to the above, the same also applies to the case where the pad 102 on the inside in a brand-new condition is first installed in the pad sliding parts 32B and 33B on the inside and then the pad 102 on the outside in a brand-new condition is mounted in the pad sliding parts 32A and 33A on the outside. Namely, in the pad arrangement space 61 and the pad mounting space 52, in a state in which the pad 102 on the inside in a brand-new state is mounted in the pad sliding parts 32B and 33B on the inside, even in a state in which this pad 102 on the inner side is brought close to the innermost side, that is, even in a state in which the rear surface 126 of the back plate 121 of this pad 102 is caused to abut on the inner side with the middle wall surface part 86B so as to be in contact with each other Come surface contact, are not mounted in the caliper main body 15. That is, in a state where the tip face 127 of the outside pad 102 in a brand-new state is brought into surface contact with the tip face 127 of the inside pad 102 and placed parallel to the inside pad 102, not be mounted in the caliper main body 15.

That is, in the caliper main body 15, in a state where the pad 102 on the inside in a brand-new condition is first mounted in the pad sliding parts 32B and 33B on the inside and is positioned at a final position on the innermost side, even if the pad 102 on the outside in a brand new state is moved in the rotor radial direction while its tip face 127 is brought into surface contact with the tip face 127 of the pad 102 on the inside, this of the pad sliding parts 32A, 32B, 33A and 33B and the supporting clutch part 51, forming the pad mounting space 52 and the pad arranging space 61 is inhibited. Specifically, after the extension part 131 of the pad 102 is placed on the outside on the outward side in the rotor radial direction of the pad sliding part 32A and the clutch supporting part 51 even if the extension part 132 is caused to pass through the pad mounting space 52 and overlaps the Pad sliding part 33A in the rotor radial direction, the extension part 132 positionally traverses the pad sliding part 33A in the rotor rotating direction and the rotor axial direction, thereby causing undesired component contact. Therefore, it cannot cross the pad sliding part 33A in the rotor radial direction.

This relationship will be further described. The distance between the rear surface 126 of the backing plate 121 of the pad 102 on the outside in a new condition and the toe face 127 of the pad material 122 is regarded as a delivery thickness Pt1. The delivery thickness Pt1 is the maximum thickness of the lining 102 in a new condition. In addition, the distance between the back surface 126 of the back plate 121 of the pad 102 on the inside in a brand-new condition and the tip face 127 of the pad material 122 is regarded as a delivery thickness Pt2. The delivery thickness Pt2 is also the largest thickness of the lining 102 in a new condition. Since the two pads 102 are unitary components, Pt1=Pt2 is derived and Pt1=Pt2=Pt is derived.

Also, the distance between the rotor-facing surface 72B of the pad sliding part 32B on the rotor inlet side and the inside and the middle wall surface part 86B is regarded as a width Ci in the rotor axial direction. The distance between the rotor-facing surface 82A of the pad sliding part 33A on the rotor inlet side and the outside and the middle wall surface part 86A is regarded as Co. Also, the distance between the rotor-facing surface 72B and the rotor-facing surface 82A is considered to be Csx. Since the pad sliding part 32B and the pad sliding part 33A have mirror-symmetrical shapes, Co=Ci is derived.

Consequently, as in 8th As illustrated, the total distance Co+Csx of the pad sliding part 33A on the outside and the pad mounting space 52 in the rotor axial direction is smaller than the thickness of two of the pads 102 (2×Pt). That is, a relation of 2×Pt>Co+Csx is derived.

Also, the total distance Ci+Csx of the inner side pad sliding part 32B and the pad mounting space 52 in the rotor axial direction is smaller than the thickness of two of the pads 102 (2×Pt). That is, a relation of 2×Pt>Ci+Csx is derived.

In other words, a dimensional relationship is derived in which the total distance of either the outside pad sliding part 33A or the inside pad sliding part 32B and the pad mounting space 52 in the rotor axial direction is shorter than the thickness of two of the pads 102 .

For this reason, for example, in the present embodiment, as in 9 1, the outside pad 102 in a brand-new condition is first installed in the outside pad sliding portions 32A and 33A. Thereafter, when the pad 102 on the inside in a brand-new state is mounted in the pad sliding parts 32B and 33B on the inside, a state is realized in which this pad 102 on the outside is brought close to the outermost side, in other words, a state in which the back surface 126 of the back plate 121 of this lining 102 is caused to abut on the outside of the middle panel part 86A so that they come into surface contact with each other. Moreover, the extension part 131 can be passed through the pad mounting space 52 when the pad 102 on the inside is tilted in a brand-new state with respect to the pad 102 on the outside. In this way, in the present embodiment, the pad arrangement space 61 and the pad mounting space 52 are formed to have shapes in which the pad 102 is mounted on the inside in a brand-new state in the caliper main body 15 . 9 14 is also a view of a part near the pad arrangement space 61 of the caliper main body 15 seen from the outward side in the rotor radial direction in a direction of the radial direction reference line.

That is, in the pad sliding parts 32A, 32B, 33A, and 33B and the supporting clutch part 51 forming the pad mounting space 52 and the pad arranging space 61, if the pad 102 on the outside is in a brand-new condition, the first in the pad sliding parts 32A and 33A on the outside is in a state of being positioned at the end position on the outermost side when the pad 102 on the inside is in a brand new condition from the inboard side to the outboard side in the rotor radial direction is moved, it can be passed through without inhibiting it.

Also, unlike the above, even if the inner pad 102 in a brand new condition is first installed in the inner pad sliding parts 32B and 33B and then the outer pad 102 in a brand new condition is mounted in the pad sliding parts 32A and 32A 33A is mounted on the outside, a state is realized in which this pad 102 is brought close to the innermost side on the inside, in other words, a state in which the back surface 126 of the back plate 121 of this pad 102 on the inside abuts against the middle wall surface part 86B so that they come into surface contact with each other. Accordingly, if the pad 102 on the outside is tilted in a brand-new state with respect to the pad 102 on the inside, the extension part 132 can be passed through the pad mounting space 52 . In this way, the pad arrangement space 61 and the pad mounting space 52 are formed to have shapes in which the pad 102 on the outside can be mounted in the caliper main body 15 in a brand-new state.

That is, in the pad sliding parts 32A, 32B, 33A, and 33B and the supporting clutch part 51 forming the pad mounting space 52 and the pad arranging space 61, if the pad 102 on the inside is in a brand new condition, the first in the pad sliding parts 32B and 33B mounted on the inside is in a condition in which it is positioned at the end position on the innermost side, when the pad 102 on the outside in a brand-new state is moved from the inboard side to the outboard side in the rotor radial direction, it can move through without being obstructed.

This relationship is related to 10 further described. 10 14 is also a view of a part near the pad arrangement space 61 of the caliper main body 15 viewed from the outward side in the rotor radial direction in a direction of the radial direction reference line. 10 12 exemplifies a case where the outside pad 102 in a brand-new condition is mounted in the outside pad sliding parts 32A and 33A first, and then the inside pad 102 in a brand-new condition is mounted in the pad sliding parts 32B and 33B mounted on the inside.

When viewed in a direction of the radial direction reference line, the shortest distance between a boundary position X1 between the tip surface 127 of the pad material 122 of the pad 102 on the outside in a brand-new state, which is mounted first in the pad sliding parts 32A and 33A on the outside and close to the outermost side and side surface 128 is brought to the rotor inlet side; and a boundary position X2 between the torque receiving surface 71B of the pad sliding part 32B on the inside and the rotor-opposing surface 72B as Csm. The shapes of the pad mounting space 52 and the pad arranging space 61 are set so that this shortest distance Csm becomes larger than the delivery thickness Pt of the pad 102 on the inside. A straight line extending orthogonally to the line connecting the boundary position X1 and the boundary position X2 from the boundary position X2 to the rotor outlet side does not intersect the middle wall surface part 86B.

In addition, the shortest distance between a boundary position between the tip surface 127 of the pad material 122 of the pad 102 on the inside in a brand-new state on the side of the pad mounting space 52 mounted first in the pad sliding parts 32B and 33B on the inside and close to the innermost side and the side surface 128 is brought to the rotor inlet side; and a boundary position between the torque receiving surface 81A of the pad sliding part 33A on the outside and the rotor-opposing surface 82A as Csm. The shapes of the pad mounting space 52 and the pad arranging space 61 are set so that this shortest distance Csm becomes larger than the delivery thickness Pt of the pad 102 on the outside.

That is, the shapes of the pad mounting space 52 and the pad arranging space 61 are set so that Csm>Pt is derived.

The shortest distance Csm will now be further described.

As described above, Co=Ci is derived.
Ct=Co+Csx+Ci is derived.
In addition, A=Csx+Co-Pt is derived.

Here, A is a distance between the tip surface 127 of the pad 102 on the outside and the rotor-facing surface 72B of the pad slider 32B on the inside.

In addition, the shortest distance between the torque receiving surfaces 71B and 81A of the pad sliding parts 32B and 33A and the limit position X1 of the pad material 122 of the pad 102 on the outside is regarded as S and the line connecting the limit position X1 and the limit position X2 and the torque receiving surfaces 71B and 81A is considered to be θ.

$$\mathrm{\theta }=\text{arctan}\left(\text{S/A}\right)$$

$$\text{cos}\mathrm{\theta }=\text{A/Csm}$$

$$\text{cos}\left(\text{arctan}\left(\text{S/A}\right)\right)=\text{A/Csm}$$

$$\text{Csm}=\text{A/cos}\left(\text{arctan}\left(\text{S/A}\right)\right)$$

$$\text{Csm}=\left(\text{Csx}+\text{Co}-\text{Pt}\right)\text{/cos}\left(\text{arctan}\left(\text{S/A}\right)\right)\text{hergeleitet}.$$

consequently become $$\text{tan}\mathrm{\theta }=\text{S/A}$$

$$\mathrm{\theta }=\text{arctan}\left(\text{S/A}\right)$$

$$\text{cos}\mathrm{\theta }=\text{A/Csm}$$

$$\text{cos}\left(\text{arctan}\left(\text{S/A}\right)\right)=\text{A/Csm}$$

$$\text{Csm}=\text{A/cos}\left(\text{arctan}\left(\text{S/A}\right)\right)$$

$$\text{Csm}=\left(\text{csx}+\text{co}-\text{pt}\right)\text{/cos}\left(\text{arctan}\left(\text{S/A}\right)\right)\text{derived}.$$

From above, when a brand-new pad 102 is placed at an end position in a direction away from the disc rotor 11 in the other pad sliding part 33A on the outside, the limit position X2, which is an end part on the disc rotor side and the rotor run-out side of a pad sliding part 32B on the Inside is provided at a position where the shortest distance Csm with respect to the pad 102 becomes longer than the thickness Pt of one of the pads 102, that is, a position where Csm>Pt is derived.

In other words, when a brand-new pad 102 is placed at an end position in a direction away from the disc rotor 11 in the other pad sliding part 33A on the outside, the limit position is X2, which is an end part on the disc rotor side and the rotor outlet side of the one pad sliding part 32B the inside is provided at a position where the gap with respect to this pad 102 becomes longer than the thickness Pt of one of the pads 102 .

Therefore, when the pad 102 on the outside and the pad 102 on the inside are mounted in this order, the pair of pads 102 can be assembled in a brand-new state in the caliper main body 15 .

Likewise, when a brand new pad 102 is placed at an end position in a direction away from the disk rotor 11 in the one pad sliding part 32B on the inside, the limit position which is an end part on the disk rotor side and the rotor run-out side of the other pad sliding part 33A on the outside is , provided at a position where the shortest distance with respect to this pad 102 becomes longer than the thickness of one of the pads 102. FIG.

In other words, when a brand-new pad 102 is placed at an end position in a direction away from the disc rotor 11 in the one pad sliding part 32B on the inside, the limit position, which is an end part on the disc rotor side and the rotor outlet side of the other pad sliding part 33A on the outside is provided at a position where the gap with respect to this pad 102 becomes longer than the thickness of one of the pads 102 .

Therefore, when the pad 102 on the inside and the pad 102 on the outside are mounted in this order, the pair of pads 102 can be mounted in the caliper main body 15 in a brand-new state.

The foregoing Patent Literature 1 discloses a disk brake having a structure in which a space opening in the rotor radial direction is provided in a caliper main body, and pads are arranged in this space. Although disc brakes need to be downsized if simply downsized, the pads may not be able to be installed in the caliper main body.

In contrast, in the present embodiment, Co+Csx, which is the total distance of the pad sliding part 33A on the outside and the pad mounting space 52, is smaller than the thickness of two of the pads 102 (2×Pt) in the rotor axial direction. Likewise, Ci+Csx, which is the total distance of the pad sliding part 32B on the inside and the pad mounting space 52, is smaller than the thickness of two of the pads 102 (2×Pt) in the rotor axial direction. Accordingly, the caliper main body 15 can be downsized at least in the rotor axial direction.

Moreover, when a brand-new pad 102 is placed at an end position in a direction away from the disk rotor 11 in the other pad sliding part 33A on the outside, the limit position X2, which is an end part on the disk rotor side and the rotor run-out side of the one pad sliding part 32B on the inner side, is provided at a position where the shortest distance Csm with respect to this pad 102, that is, the gap becomes longer than the thickness Pt of one of the pads 102.

Likewise, when a brand new pad 102 is placed at an end position in a direction away from the disk rotor 11 in the one pad sliding part 32B on the inside, the limit position which is an end part on the disk rotor side and the rotor run-out side of the other pad sliding part 33A on the outside is , is provided at a position where the shortest distance with respect to this pad 102, that is, the gap becomes longer than the thickness of one of the pads 102. FIG.

Accordingly, the pair of pads 102 can be assembled in the caliper main body 15 in a brand-new state.

Therefore, the caliper 12 as well as the caliper main body 15 can be downsized while the mountability of the pair of pads 102 in a brand-new state with respect to the caliper main body 15 is ensured. As a result, weight reduction, cost reduction, and mountability improvement of the caliper 12 to the vehicle can be achieved.

In addition, when the vehicle moves forward, the pad mounting space 52 is provided on the rotor inlet side. Therefore, the rigidity on the side of the pad sliding parts 32A and 33B on the rotor trailing-out side, which receives larger torque, can be improved by coupling them through the supporting clutch part 51 . In addition, the engaging surface parts 73A and 83B which engage the pads 102 of the pad sliding parts 32A and 33B can be continued by means of the engaging surface part 53 of the clutch supporting part 51 . Therefore, an abutment area of the caliper main body 15 to the pads 102 on the rotor trailing-off side becomes larger. This improves the vibration resistance. Furthermore, no machining is required to form a pad mounting space between the pad sliding parts 32A and 33B, and therefore the machining cost can be reduced. That is, compared to a case where the pad mounting space is provided on the rotor runout side, the rigidity and vibration resistance of the caliper main body 15 can be effectively increased, and the machining cost can be reduced.

The supporting coupling part 51 is not necessarily provided. That is, if the clearance between the pad sliding parts 32A and 33B is caused to be narrower than the clearance between the pad sliding parts 32B and 33A, in other words, the distance between the rotor-facing surfaces 72B and 82A in the rotor axial direction, it acts to Improving the rigidity and vibration resistance of the caliper main body 15.

In the present embodiment, the pad mounting space 52 is formed only on the rotor inlet side of the caliper main body 15 when the vehicle moves forward. However, in addition to this construction, the pad mounting space 52 may be formed on the rotor run-out side of the caliper main body 15 when the vehicle moves forward. In addition, the pad mounting space 52 can be formed only on the rotor run-out side of the caliper main body 15 when the vehicle is moving forward.

In addition, the rotor-facing surfaces 72B and 82A are caused to extend perpendicular to the rotor axis, but can be tilted to skew with respect to the rotor axis.

A disc brake according to a first aspect of the present embodiment described above includes a pair of pads that presses a disc rotor; and a caliper main body including a pad mounting space that is arranged to extend across the disc rotor and opens in a rotor radial direction, and a pair of pad sliding parts that support the pair of pads on both sides of the pad mounting space in a rotor axial direction so that the pair of pads can slide in the rotor axial direction , having. In the rotor axial direction, a total length of the pad sliding part on an outside or on an inside and the pad mounting space is shorter than the thickness of two of the pads. When one of the pads is arranged at an end part position in a direction away from the disc rotor in the other of the two pad sliding parts, an end part is provided in one of the pad sliding parts on the disc rotor side at a position where a gap with respect to the pad is longer than a thickness from one of the pads.

According to this construction, downsizing can be achieved.

Also, according to a second aspect, in the first aspect, when a vehicle moves forward, the pad mounting space is formed on a leading-in side of the disc rotor in a rotating direction.

Also, according to a third aspect, in the first aspect or the second aspect, the end part of the pad sliding parts on the disc rotor side is at a boundary position of an end part of the pad sliding parts on the disc rotor side and in a rotor run-out direction.

Also, according to a fourth aspect, a disc brake includes a pair of pads that press a disc rotor; and a caliper main body including a pad mounting space that is arranged to extend across the disc rotor and opens in a rotor radial direction, and a pair of pad sliding parts that support the pair of pads on both sides of the pad mounting space in a rotor axial direction so that the pair of pads can slide in the rotor axial direction , having. In the rotor axial direction, a total length of the pad sliding part on an outside or on an inside and the pad mounting space is shorter than the thickness of two of the pads. When one of the pads is arranged at an end part position in a direction away from the disc rotor in the other of the two pad sliding parts, an end part is provided in one of the pad sliding parts on the disc rotor side at a position where a distance with respect to the pad is longer than a thickness from one of the pads.

According to this construction, downsizing can be achieved.

Also, according to a fifth aspect, in the fourth aspect, when a vehicle moves forward, the pad mounting space is formed on a leading-in side of the disk rotor in a rotating direction.

Also, according to a sixth aspect, in the fourth aspect or fifth aspect, the end part of the pad sliding parts on the disc rotor side is at a boundary position of an end part of the pad sliding parts on the disc rotor side and in a rotor run-out direction.

[Industrial Applicability]

According to the disc brake of the present embodiment, downsizing can be achieved.

Reference List

10

disc brake

11

disk rotor

15

caliper main body

32A, 32B, 33A, 33B

lining sliding part

52

Pad assembly room

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• JP 2019233896 [0002]

Claims (6)

Disc brake, comprising: a pair of pads that apply pressure to a disc rotor; and a caliper main body including a pad mounting space which is arranged extending across the disc rotor and opens in a rotor radial direction, and a pair of pad sliding parts which support the pair of pads on both sides of the pad mounting space in a rotor axial direction so that the pair of pads can slide in the rotor axial direction, having, wherein, in the rotor axial direction, a total length of the pad sliding part on an outside or on an inside and the pad mounting space is shorter than thicknesses of two of the pads, and wherein, when one of the pads is arranged at an end part position in a direction away from the disc rotor in the other of the two pad sliding parts, an end part is provided in one of the pad sliding parts on the disc rotor side at a position where a gap with respect to the pad is longer than a thickness of one of the pads becomes. disc brake after claim 1 , wherein the pad mounting space is formed on a leading-in side of the disk rotor in a rotating direction when a vehicle moves forward. disc brake after claim 1 or 2 wherein the end part of the pad sliding parts on the disc rotor side is at a limit position of an end part of the pad sliding parts on the disc rotor side and in a rotor run-out direction. Disc brake, comprising: a pair of pads that apply pressure to a disc rotor; and a caliper main body including a pad mounting space which is arranged extending across the disc rotor and opens in a rotor radial direction, and a pair of pad sliding parts which support the pair of pads on both sides of the pad mounting space in a rotor axial direction so that the pair of pads can slide in the rotor axial direction, having, wherein, in the rotor axial direction, a total length of the pad sliding part on an outside or on an inside and the pad mounting space is shorter than thicknesses of two of the pads, and wherein, when one of the pads is arranged at an end part position in a direction away from the disc rotor in the other of the two pad sliding parts, an end part is provided in one of the two pad sliding parts on the disc rotor side at a position where a distance with respect to the pad is longer as a thickness of one of the pads. disc brake after claim 4 , wherein the pad mounting space is formed on a leading-in side of the disk rotor in a rotating direction when a vehicle moves forward. disc brake after claim 4 or 5 wherein the end part of the pad sliding parts on the disc rotor side is at a limit position of an end part of the pad sliding parts on the disc rotor side and in a rotor run-out direction.

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