JP7296282B2 - Pad clip, assembly of pad clip and return spring, and floating disc brake - Google Patents

Description

The present invention relates to a floating disc brake used for braking a vehicle, a pad clip, and an assembly of a pad clip and a return spring incorporated in the floating disc brake.

FIG. 27 shows a conventional floating type disc brake disclosed in Japanese Patent Application Laid-Open No. 2002-372082. A floating type disc brake 1 includes a support 2, a yoke (caliper) 3, and both inner and outer pads 4 and 5.

The support 2 is fixed to a suspension system such as a knuckle that constitutes the vehicle body while being adjacent to the axially inner side of the rotor 6 that rotates with the wheel.

Throughout this specification and claims, the terms "axial," "radial," and "circumferential" refer to the axial, radial, and circumferential directions of the rotor unless otherwise specified. Further, with respect to each member constituting the floating type disc brake, the axial inner side refers to the center side in the width direction of the vehicle, and the axial outer side refers to the outer side in the width direction of the vehicle. In addition, the circumferentially inner side refers to the center side in the circumferential direction of the assembled floating type disc brake, and the circumferentially outer side refers to both sides of the floating type disc brake in the assembled state in the circumferential direction.

The yoke 3 has a bifurcated claw portion 7 on its axially outer side and a cylinder 8 on its axially inner side, and is supported by the support 2 so as to be movable in the axial direction. For this purpose, in the illustrated example, a pair of slide pins 9 whose base ends are supported and fixed to the yoke 3 are slidably inserted into a pair of slide holes 10 provided in the support 2. there is

The inner pad 4 is arranged axially inside the rotor 6 and is supported by the support 2 so as to be movable in the axial direction. On the other hand, the outer pad 5 is arranged on the axially outer side of the rotor 6 and supported by the axially inner side surface of the claw portion 7 forming the yoke 3 . For this purpose, a pad spring 11 fixed to the axially outer side surface (back surface) of the outer pad 5 is engaged with the pawl portion 7 . A pair of dowels 12 formed on the axially outer side surface of the outer pad 5 are fitted into a pair of receiving holes (dowel holes) 13 formed on the axially inner side surface of the claw portion 7 respectively.

When performing braking, pressurized oil is fed into the cylinder 8, and the inner pad 4 is pressed against the axial inner surface of the rotor 6 by a piston (not shown) from above to below in FIG. Then, as a reaction to this pressing force, the yoke 3 moves upward in FIG. impose. As a result, the rotor 6 is strongly clamped from both sides in the axial direction for braking.

Japanese Patent Application Laid-Open No. 2002-372082

In the conventional floating type disc brake 1 as described above, the outer pad 5 is not supported by the support 2, but directly supported by the pawl portion 7 of the yoke 3. Therefore, the support 2 can be made smaller and This is advantageous for weight reduction.

However, the floating type disc brake 1 having the conventional structure has the following problem to be solved due to the adoption of the structure in which the outer pad 5 is supported by the yoke 3 .
That is, during braking, a brake tangential force directed in the circumferential direction (the run-out side) acts on the inner pad 4 and the outer pad 5, respectively. The brake tangential force acting on the inner pad 4 is directly supported by the support 2 fixed to the suspension system, while the brake tangential force acting on the outer pad 5 is transferred via the yoke 3 to the slide pin 9 and the slide hole 10 . is supported at the abutment portion of the The axial position of the contact portion between the slide pin 9 and the slide hole 10 is far inward in the axial direction from the axial position of the point of application of the brake tangential force acting on the outer pad 5 . Therefore, the yoke 3 tends to tilt in the direction indicated by the arrow α in FIG. 27 due to the braking tangential force acting on the outer pad 5 . As a result, the outer pad 5 comes into uneven contact with the rotor 6 during braking, and uneven wear of the outer pad 5 is likely to occur. Also, due to the gap between the slide pin 9 and the slide hole 10, the yoke 3 and the outer pad 5 are likely to vibrate when the vehicle is running.

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure capable of stabilizing the posture of a yoke that supports an outer pad.

A pad clip according to an aspect of the present invention is made of a metal plate, supports a brake tangential force acting on an outer pad during braking, and is arranged radially outward of a rotor. attached to a shaped anchor.
The pad clip is axially movably supported with respect to the fixed member, and pushes a yoke for pressing the outer pad against the axial outer surface of the rotor during braking radially outward with respect to the anchor. A radial pressing portion is provided.

A pad clip according to an aspect of the present invention may further include an attachment portion for attachment to the anchor.
In this case, the anchor can be elastically held (embraced) by the attachment portion.

In the pad clip according to one aspect of the present invention, the radial pressing portion is connected to the axially inner portion of the mounting portion, and the intermediate portion has a substantially U-shaped bent portion that is open radially outward. can be In other words, the intermediate portion of the radial pressing portion may be provided with the bent portion that is bent radially inward and then bent radially outward.

In the pad clip according to one aspect of the present invention, at least a tip portion of the radial pressing portion that contacts the radial inner surface of the yoke can be arranged at a position that overlaps the anchor in the radial direction.

In the pad clip according to one aspect of the present invention, the radial direction pressing portion has a pressing convex portion that is bent so as to be convex radially outward at the tip portion that contacts the radial inner surface of the yoke. can do.
In this case, the pressing protrusion can have a semi-elliptical spherical shell shape or a hemispherical shell shape in which the contour shape (cross-sectional shape) of the outer surface is a convex circular arc shape, and the contour shape of the outer surface is triangular. It can also be conical. Further, when the pressing convex portion is formed in the shape of a semi-elliptical spherical shell, the major axis direction can be arranged in the axial direction and the minor axis direction can be arranged in the circumferential direction.

A pad clip according to an aspect of the present invention may include two radial pressing portions, and the radial pressing portions may be arranged in the circumferential direction.
In this case, each of the radial pressing portions can be extended over the entire length in a direction away from each other toward the distal end side. It is also possible to extend (fold back) in a direction to approach each other as it goes toward.
Alternatively, only one radial pressing portion may be provided, and the radial pressing portions may be arranged in the circumferential direction or the axial direction.

A pad clip according to an aspect of the present invention may further include a circumferential pressing portion for pressing the outer pad toward the outlet side.
In this case, the circumferential pressing portion can be provided so as to be connected to the end of the mounting portion on the outlet side.

In the pad clip according to one aspect of the present invention, the circumferential pressing portion has a strut portion that struts between the circumferential side surfaces of the anchor and the outer pad, and the strut portion rotates around the anchor. An anchor pressing portion that presses the inner side in the radial direction may be provided on the radially outer portion, and a pad pressing portion that presses the outer pad toward the exit side may be provided on the inner portion in the radial direction.

In the pad clip according to one aspect of the present invention, the circumferential pressing portion has a substantially semi-cylindrical curved portion that is open radially inward at a portion connected to the radially outer portion of the strut portion. can be done. In other words, the curved portion, which is bent radially outward and then bent radially inward, may be provided at a proximal end portion of the circumferential pressing portion with respect to the strut portion.

The pad clip according to one aspect of the present invention may further include a stopper portion on the axially outer portion for preventing excessive axially inward movement with respect to the anchor.

The pad clip according to one aspect of the present invention may further include an engaging claw that engages with the anchor to prevent it from coming off the anchor.

The pad clip according to one aspect of the present invention may further include at least two or more guide pieces axially inward of the mounting portion for guiding the end portion of the anchor to the inside of the mounting portion. can.
In this case, the guide pieces can be spaced apart in the circumferential direction.

An assembly of a pad clip and a return spring according to the present invention includes a pad clip according to one aspect of the present invention, and a wire return spring for pressing the outer pad or the yoke axially outward. and the return spring is retained against the pad clip.

An assembly of a pad clip and a return spring according to one aspect of the present invention further includes a spring holding portion for holding the return spring, and the return spring is an annular coil. By inserting the spring holding portion inside the coil portion, the spring holding portion can be held with respect to the pad clip.

In the assembly of the pad clip and the return spring according to one aspect of the present invention, the spring holding portion may have a return portion that prevents the return spring from coming out radially outward.

An assembly of a pad clip and a return spring according to one aspect of the present invention includes a return spring pressing arm for pressing the return spring toward the pad clip or the return side portion of the yoke axially outward. and a delivery-side pressing arm for pressing the pad clip or the delivery-side portion of the yoke axially outward, wherein the pressing force of the delivery-side pressing arm is It can be made larger than the pressing force of the output-side pressing arm.

A floating type disc brake according to an aspect of the present invention includes an outer pad arranged axially outside a rotor, an inner pad arranged axially inside the rotor, an inner pad arranged axially inside the rotor, and A fixing member that supports the inner pad movably in the axial direction and is fixed to the vehicle body; and a yoke that supports the outer pad and is movably supported in the fixing member in the axial direction. .
A floating type disc brake according to an aspect of the present invention includes a metal plate pad clip that presses the yoke, and a wire return spring that presses the outer pad or the yoke axially outward. Further, the fixing member has a cantilever-shaped anchor that bears a brake tangential force acting on the outer pad during braking and is arranged radially outwardly of the rotor.
The pad clip and the return spring are an assembly of the pad and the return spring according to one aspect of the present invention.

According to the present invention, the posture of the yoke that supports the outer pad can be stabilized.

FIG. 1 is a front view of a floating type disc brake according to a first embodiment, viewed from the outside in the axial direction. FIG. 2 is a plan view showing the floating type disc brake according to the first embodiment. FIG. 3 is a side view of the floating type disc brake according to the first embodiment as seen from the circumferential direction. FIG. 4 is a rear view of the floating type disc brake according to the first embodiment as seen from the inside in the axial direction. FIG. 5 is a cross-sectional view taken along line AA of FIG. 6 is a cross-sectional view taken along the line BB in FIG. 3. FIG. FIG. 7 is a perspective view showing a floating disc brake according to the first embodiment. FIG. 8 is a perspective view showing a cylinder unit removed from the floating type disc brake according to the first embodiment. FIG. 9 is a bottom view showing a cylinder unit removed from the floating type disc brake according to the first embodiment. FIG. 10 is a front view of the floating type disc brake according to the first embodiment, with the cylinder unit and the outer pad taken out and viewed from the outside in the axial direction. FIG. 11 is a plan view showing a cylinder unit and an outer pad taken out from the floating type disc brake according to the first embodiment. FIG. 12 is a perspective view of the floating type disc brake according to the first embodiment, with the cylinder unit and the outer pad taken out and viewed from the outside in the axial direction. FIG. 13 is a perspective view of the floating type disc brake according to the first embodiment, with the cylinder unit and the outer pad taken out and viewed from the inside in the axial direction. 14 is a partially enlarged view of FIG. 10. FIG. 15 is a partially enlarged view of FIG. 9. FIG. 16A and 16B are views showing a pad clip incorporated in the floating disc brake according to the first embodiment, where (A) is a front view, (B) is a plan view, and (C) is a bottom view. FIG. 4D is a right side view. FIG. 17 is a perspective view showing a pad clip incorporated in the floating type disc brake according to the first embodiment, (A) is a perspective view seen from the outflow side, and (B) is the inflow side. 1 is a perspective view seen from . FIG. 18 is a diagram of the outer pad and the anchor viewed from the outside in the axial direction to explain the state during braking in relation to the first example of the embodiment, and (A) shows the state during forward braking, (B) shows the state during reverse braking. FIG. 19 is a diagram corresponding to FIG. 16, showing a second example of the embodiment. FIG. 20 is a diagram corresponding to FIG. 17, showing a second example of the embodiment. FIG. 21 is a diagram corresponding to FIG. 16, showing a third example of the embodiment. FIG. 22 is a diagram corresponding to FIG. 17, showing a third example of the embodiment. FIG. 23 is a diagram corresponding to FIG. 16, showing a fourth example of the embodiment. FIG. 24 is a diagram corresponding to FIG. 17, showing a fourth example of the embodiment. FIG. 25 is a diagram corresponding to FIG. 16, showing a fifth example of the embodiment. FIG. 26 is a diagram corresponding to FIG. 17, showing a fifth example of the embodiment. FIG. 27 is a partial cross-sectional view of a conventional floating type disc brake viewed from the outside in the radial direction.

[First example of embodiment]
A first example of the embodiment will be described with reference to FIGS. 1 to 18. FIG.

<Overall structure of floating type disc brake>
The floating type disc brake 1a of this example is used for braking an automobile, and includes a support 2a, a yoke 3a, inner and outer pads 4a and 5a, a cylinder unit 19 having an anchor 31, A pair of slide pins 9a, a pad clip 14 and a return spring 15 are provided. Each of these components includes a support 2a, an inner pad 4a, a cylinder unit 19, and a pair of slide pins 9a arranged axially inward with respect to a disc-shaped rotor 6 (see FIG. 2) that rotates with the wheel. , the outer pad 5a, the pad clip 14, and the return spring 15 are arranged on the outer side in the axial direction, and the yoke 3a is arranged on the outer side in the radial direction.

In this specification, both sides of the assembled floating type disc brake 1a in the assembled state are referred to as circumferentially outer sides. The entry side is referred to as the exit side when the side from which the rotor 6 exits when the vehicle moves forward. In this example, the right side in FIGS. 1, 2, 6, 10, 11, and 14 is the turn-in side, and the left side in FIGS.

〔support〕
The support 2a is made of metal, arranged axially inside the rotor 6, and fixed to the vehicle body. As shown in FIGS. 1, 4 and 6, the support 2a has a substantially U-shaped shape when viewed from the axial direction, a support base 16 disposed radially inward and extending in the circumferential direction, and a support base 16 extending in the circumferential direction. A pair of support arms 17 extend radially outward from the circumferentially outer sides. The support base 16 has mounting holes 18 for fixing the support 2a to a suspension device such as a knuckle on each of its circumferentially outer sides. The support arm portion 17 has a fastening hole 20 for fixing the cylinder unit 19 to the support 2a. The support arm portion 17 has an engaging recess portion 21 on the inner side surface in the circumferential direction for supporting the brake tangential force and torque acting on the inner pad 4a during braking.

[Cylinder unit]
As shown in FIGS. 5 and 8 to 13, the cylinder unit 19 includes a substantially cylindrical cylinder 8a and a pair of cylinder arms extending outward from the outer peripheral surface of the cylinder 8a in the circumferential direction. a portion 22; The cylinder 8a has a pipe port 23 and a bleeder 24 at two circumferentially spaced positions on the radially outer portion of the outer peripheral surface. The cylinder unit 19 is fixed to the support 2a as will be described later, and constitutes a fixed member together with the support 2a. In the structure of this example, the yoke 3a and the cylinder 8a are configured separately from each other, but when carrying out the present invention, the yoke and the cylinder can be configured integrally, though not shown. .

As shown in FIG. 5, the internal space of the cylinder 8a is open on both sides in the axial direction, and a first piston 25 and a second piston 26 are fitted therein so as to be axially movable. A portion of the internal space of the cylinder 8a that exists between the first piston 25 and the second piston 26 serves as a hydraulic chamber for introducing pressure oil. Also, boots 27a and 27b are provided so as to bridge between the ends of the cylinder 8a on both sides in the axial direction and the tip portions of the first piston 25 and the second piston 26, respectively. The cylinder 8a has small-diameter portions 28a and 28b at both ends in the axial direction. Further, seal members 29a and 29b are provided between the inner peripheral surface of the cylinder 8a and the outer peripheral surfaces of the first piston 25 and the second piston 26, respectively.

The cylinder arm portion 22 has an insertion hole 30 for inserting the tip portion of the slide pin 9a (for example, see FIGS. 2, 4 and 7) at the tip portion. In the cylinder unit 19, the tip of the cylinder arm 22 is overlapped with the tip of the support arm 17 from the inside in the axial direction, and the tip of the slide pin 9a inserted through the insertion hole 30 of the cylinder arm 22 is It is fixed to the support 2 a by screwing it into the fastening hole 20 of the support arm 17 .

"anchor"
The cylinder 8a constituting the cylinder unit 19 has an anchor 31 for supporting the brake tangential force acting on the outer pad 5a during braking. The anchor 31 has a substantially trapezoidal shape when viewed from the radial direction, and is integrally formed with the cylinder 8a. The anchor 31 is supported in a cantilever manner at the radially outer end of the axially outer portion of the cylinder 8a. The anchor 31 is arranged radially outside the rotor 6 and radially inside the yoke 3a, as shown in FIGS. In addition, the anchor 31 may have a symmetrical shape with respect to the circumferential direction (symmetrical shape in FIG. 11), or may have an asymmetrical shape with respect to the circumferential direction. Moreover, when carrying out the present invention, it is also possible to adopt a configuration in which the anchor is made separate from the cylinder and fixed to the cylinder using a fastening member such as a bolt.

The anchor 31 has a plate shape and is arranged substantially parallel to the central axis of the rotor 6 . In addition, since the anchor 31 receives a brake tangential force directed in the circumferential direction, the cross-sectional shape with respect to a virtual plane perpendicular to the axial direction is set to a radial It has a substantially rectangular shape whose circumferential width is larger than its directional width. The end faces on both sides in the circumferential direction of the anchor 31 are flat surfaces, and chamfered portions are provided on both sides in the radial direction.

The anchor 31 has a tapered portion 32 at the axially inner end (base end) to the intermediate portion, the circumferential width of which decreases toward the axially outer side. is provided with a constant width portion 33 whose circumferential width and radial width are constant over the axial direction. As will be described later, the constant-width portion 33 is arranged between a pair of radial projections 49a and 49b provided on the outer pad 5a that moves axially together with the yoke 3a. Its axial width is regulated in consideration of the amount of directional movement. In addition, the anchor 31 has a relief recess 34 on the radially inner surface of the axially inner portion thereof for attaching the boot 27a to the small diameter portion 28a provided on the cylinder 8a. In this example, the axially inner portion of the anchor 31 is curved so that the radially outer side is convex, thereby forming the recessed portion 34 on the radially inner side surface of the anchor 31 .

〔yoke〕
The yoke 3a is made of metal or non-metal and, for example, as shown in FIGS. They are arranged so as to cover the pad clips 14 from the outside in the radial direction. Such a yoke 3a includes an inner body 35 arranged axially inside the support 2a and the cylinder unit 19, an outer body 36 arranged axially outside the outer pad 5a, and arranged radially outside the rotor 6, A bridge portion 37 axially connecting the inner body 35 and the outer body 36 is provided.

An axially outer surface of the inner body 35 at a circumferentially central portion thereof is flat and axially opposed to the tip portion of the second piston 26 fitted in the cylinder 8a. The inner body 35 has axially penetrating slide holes 10a for slidably arranging the slide pins 9a on both outer sides in the circumferential direction.

In order to support the outer pad 5a, the outer body 36 has a support hole 38, which is a bottomed hole, and a pair of receiving holes (dowel holes) (not shown) on the inner side surface in the axial direction. The support hole 38 is a substantially rectangular concave portion, and is arranged in the circumferential central portion of the axial inner surface of the outer body 36 . The pair of receiving holes are cylindrical recesses, and are arranged at positions sandwiching the support hole 38 from both outer sides in the circumferential direction. The inner diameter of the receiving hole is slightly larger than the outer diameter of a later-described dowel 48 provided on the outer pad 5a.

The bridge portion 37 is arranged radially outwardly of the rotor 6, and as shown in FIG. It has The storage recess 39 has a substantially rectangular cross-sectional shape, and is slightly larger than the cross-sectional shape of the anchor 31 in the circumferential and radial directions. In addition, the bridge portion 37 has an inner window portion 40 penetrating in the radial direction at the circumferentially central portion of the axially inner portion. From the inner window portion 40, the radially outer portion (the pipe port 23 and the bleeder 24) of the cylinder 8a is exposed. In addition, the bridge portion 37 has an outer window portion 41 penetrating in the radial direction at the circumferentially central portion of the axially outer portion. From the outer window portion 41, radial projections 49a and 49b, which will be described later and constitute the axially outer end portion of the anchor 31 and the outer pad 5a, are exposed.

Using a pair of slide pins 9a, the yoke 3a is supported by the support 2a and the cylinder unit 19, which are fixed members, so as to be movable in the axial direction. For this purpose, the slide pin 9a is inserted into the slide hole 10a of the inner body 35 from the inside in the axial direction, and the inner portion of the slide pin 9a in the axial direction is slidably arranged inside the slide hole 10a. Further, the distal end portion of the slide pin 9 a inserted through the insertion hole 30 provided in the cylinder arm portion 22 is screwed into the fastening hole 20 provided in the support arm portion 17 . Thereby, the slide pin 9a is supported and fixed to the support 2a and the cylinder unit 19, and the yoke 3a is supported so as to be movable in the axial direction with respect to the slide pin 9a.

[Inner pad]
The inner pad 4a is arranged inside the rotor 6 in the axial direction, and includes a lining (friction material) 42 and a metal back plate (pressure plate) 43 that supports the inner surface of the lining 42 in the axial direction. I have. The inner pad 4a is arranged radially outwardly of the support base 16 and circumferentially inwardly of the pair of support arms 17, so that the inner pad 4a can move in the axial direction with respect to the support 2a. It is supported with limited directional and circumferential movement. Specifically, the ear portions 44 provided on both circumferentially outer sides of the back plate 43 are engaged with the engaging recesses 21 formed on the circumferentially inner side surface of the support arm portion 17 in an uneven manner. , the inner pad 4a is supported on the support 2a. Further, in a state in which the inner pad 4a is supported by the support 2a, the tip of the first piston 25 axially faces the inner surface of the back plate 43 in the axial direction. Further, an anchor 31 is arranged on the radially outer side of the intermediate portion in the circumferential direction of the inner pad 4a.

[Outer pad]
The outer pad 5a is arranged axially outside the rotor 6, and includes a lining (friction material) 45 and a metal back plate (pressure plate) 46 that supports the axially outer surface, which is the back surface of the lining 45. ing. In this example, the outer pad 5a has a symmetrical shape with respect to the circumferential direction. A pad spring 47 made of a leaf spring is crimped and fixed to the circumferential center portion of the axial outer surface of the back plate 46 . In addition, as shown in FIGS. 10 to 12, the back plate 46 has a pair of dowels 48 on both circumferentially outer portions of the axially outer surface. The dowels 48 each have a substantially cylindrical shape and protrude axially outward from the axial outer surface of the back plate 46 .

In order to reduce the proportion of the brake tangential force acting on the outer pad 5a due to contact with the rotor 6 during braking that is transmitted to the slide pin 9a via the yoke 3a, the radially outer edge of the back plate 46 is are provided with a pair of radial projections 49a and 49b projecting radially outward. In addition, a convex curved surface 50 having a sufficiently large radius of curvature is provided at a portion between the pair of radial projections 49a and 49b on the radially outer edge portion of the back plate 46. As shown in FIG.

Each of the radial projections 49a and 49b is configured in a substantially rectangular shape, and has circumferentially opposed inner surfaces that are flat surfaces parallel to each other, and circumferentially outer surfaces that approach each other as it goes radially outward. It is an inclined surface that is inclined in the direction. The radial protrusions 49a and 49b are arranged (inserted) between the radial protrusions 49a and 49b so that the constant width portion 33 to which the pad clip 14 is attached can be arranged (inserted) so as to be relatively movable in the axial direction. are spaced apart. Therefore, the interval (distance) between the circumferential inner surfaces of the radial projections 49 a and 49 b is greater than the circumferential width of the constant width portion 33 .

In order to support the outer pad 5a on the axial inner surface of the outer body 36, a pair of dowels 48 provided on the axial outer surface of the outer pad 5a are inserted into a pair of receiving holes formed on the axial inner surface of the outer body 36. Then, the pad spring 47, which is loosely fitted (inserted) into the recesses and protrusions and fixed to the axial outer surface of the outer pad 5a, is elastically engaged with the inside of the support hole 38. As shown in FIG. By inserting the dowels 48 inside the receiving holes, the circumferential and radial movement of the outer pad 5a with respect to the outer body 36 is restricted. In addition, by elastically engaging (snap-fitting) the pad spring 47 with the support hole 38, the outer pad 5a can be positioned in the circumferential direction (to exhibit a centering function) and can be prevented from coming off axially inward. To prevent. Further, with the outer pad 5a attached to the axial inner surface of the outer body 36, the constant width portion 33 of the anchor 31 is arranged between the pair of radial projections 49a and 49b.

[Pad clip]
The pad clip 14 is attached to the constant width portion 33 of the anchor 31 and pushes the yoke 3a radially outward with respect to the anchor 31 . In other words, the pad clip 14 radially stretches between the constant width portion 33 and the yoke 3a. This suppresses the vibration of the yoke 3a and stabilizes the posture of the yoke 3a. The pad clip 14 is made by pressing an elastic and corrosion-resistant metal plate such as a stainless steel plate. , three guide pieces 54a to 54c, a stopper portion 55, and an engaging claw 56 are integrally provided.

《Mounting part》
The attachment portion 51 is a portion that attaches (attaches) the pad clip 14 to the constant-width portion 33 of the anchor 31 , and is arranged on the outer side of the pad clip 14 in the axial direction. The mounting portion 51 is configured in a substantially U-tube shape, and elastically holds (holds) the constant-width portion 33 . The mounting portion 51 includes an outer diameter side plate portion 57a and an inner diameter side plate portion 57b that elastically sandwich the constant width portion 33 from both sides in the radial direction, and end portions of the outer diameter side plate portion 57a and the inner diameter side plate portion 57b on the inlet side. A connecting plate portion 58 connecting them in the radial direction is provided. The outer diameter side plate portion 57a has a circumferential length larger than that of the inner diameter side plate portion 57b, and has a circumferential length of about 1/2 to 4/5 of the circumferential width of the constant width portion 33. As shown in FIG. On the other hand, the inner diameter side plate portion 57b has a circumferential length of about 1/2 to 2/3 of the circumferential width of the constant width portion 33. As shown in FIG. In the free state of the pad clip 14 , the distance between the outer diameter side plate portion 57 a and the inner diameter side plate portion 57 b that are arranged to face each other in the radial direction is smaller than the radial width of the constant width portion 33 .

<<Radial pressing part>>
The radial pressing portions 52 a and 52 b are portions that push up the yoke 3 a radially outward, and are arranged inside the pad clip 14 in the axial direction. Each of the radial pressing portions 52 a and 52 b is arranged in the circumferential direction and connected to the axially inner portion of the outer diameter side plate portion 57 a that constitutes the mounting portion 51 . Each of the radial pressing portions 52a and 52b includes base end plate portions 59a and 59b that extend outward in the circumferential direction and form bases of the radial pressing portions 52a and 52b, respectively, and are folded back about 180 degrees in the circumferential direction. Approximately U-shaped bent portions 60a and 60b forming intermediate portions of the radial pressing portions 52a and 52b, which are open radially outward, and tip portions of the radial pressing portions 52a and 52b extending inward in the circumferential direction. and tip plate portions 61a and 61b.

Circumferentially inner ends of the base plate portions 59a and 59b are connected to each other in the circumferential direction. Therefore, the pair of radial pressing portions 52a and 52b are integrally formed.

The bent portions 60a and 60b are provided on the outer side in the circumferential direction of the base end plate portions 59a and 59b, and are arranged at positions that are displaced from the anchor 31 on both sides in the circumferential direction (positions that do not overlap the anchor 31 in the radial direction). there is Since the bent portions 60a and 60b are bent radially inward with respect to the proximal end plate portions 59a and 59b and then folded back radially outward, a portion of the bent portions 60a and 60b has a larger diameter than the proximal end plate portions 59a and 59b. placed on the inside. As shown in FIG. 9, when the pad clip 14 is attached to the anchor 31, the bent portions 60a and 60b are arranged on both outer sides of the anchor 31 in the circumferential direction.

The tip plate portions 61a and 61b are provided circumferentially inside the bent portions 60a and 60b, and arranged radially outside the base end plate portions 59a and 59b. The tip plate portions 61a and 61b have pressing convex portions 62a and 62b, which are bent so as to be convex radially outward, on the front halves. The pressing protrusions 62a and 62b have a semi-elliptical spherical shell shape in which the contour shape (cross-sectional shape) of the outer surface is a convex circular arc shape. For this reason, the pressing projections 62a and 62b have a substantially elliptical shape when viewed in the radial direction, with the long axis direction being arranged in the axial direction and the short axis direction being arranged in the circumferential direction. As shown in FIG. 11 , when the pad clip 14 is attached to the anchor 31 , the pressing protrusions 62 a and 62 b are arranged at positions overlapping the anchor 31 in the radial direction.

<<Circumferential pressing part>>
The circumferential pressing portion 53 is a portion that presses the anchor 31 toward the retraction side and presses the outer pad 5a toward the retraction side. The circumferential pressing portion 53 has an inverted J-shaped bent shape as a whole, and is connected to the outflow side end portion of the outer diameter side plate portion 57 a that constitutes the mounting portion 51 . The circumferential pressing portion 53 includes a substantially semi-cylindrical curved portion 63 forming a base half portion, and a corrugated plate-like thrust portion 64 forming a front half portion.

The curved portion 63 has a substantially semi-cylindrical shape with an open radially inner side, which is bent radially outward with respect to the outer diameter side plate portion 57a and then bent radially inward. Therefore, for example, as shown in FIG. 14 , a gap exists between the radially inner surface of the curved portion 63 and the radially outer surface of the anchor 31 .

The strut portion 64 extends radially inward from the radially inner end portion of the curved portion 63, and extends between the exit-side end surface of the anchor 31 and the circumferentially inner surface of the radial projection 49b of the outer pad 5a. is elastically clamped in the The strut portion 64 has an anchor pressing portion 65 on the radially outer portion that is bent so that the insertion side is convex and presses the anchor 31 toward the rotation side. It has a pad pressing portion 66 that is bent so that the output side is convex and presses the outer pad 5a toward the output side. With the pad clip 14 attached to the anchor 31, the outer pad 5a is formed by the interval between the circumferentially outer surfaces of the connecting plate portion 58 and the pad pressing portion 66 of the strut portion 64, which are opposed to each other in the circumferential direction. It is larger than the interval between the circumferential inner surfaces of the pair of radial protrusions 49a and 49b.

In order to attach (mount) the pad clip 14 to the anchor 31, the pad clip 14 is brought close to the constant width portion 33 of the anchor 31 from the outside in the axial direction, and the constant width portion 33 is inserted inside the attachment portion 51 ( press-fit). However, in the free state of the pad clip 14, the distance between the outer diameter side plate portion 57a and the inner diameter side plate portion 57b arranged to face each other in the radial direction, and the distance between the connecting plate portion 58 and the strut portion 64 arranged to face each other in the circumferential direction. The interval is smaller than the radial width and the circumferential width of the constant width portion 33 . Therefore, in this example, the pad clip 14 is provided with three guide pieces 54a to 54c in order to facilitate the insertion of the constant width portion 33 into the mounting portion 51. As shown in FIG.

《Guide piece》
The guide pieces 54a to 54c are portions for guiding the insertion of the constant width portion 33 into the mounting portion 51, and are provided on the inner side of the pad clip 14 in the axial direction. Of the three guide pieces 54a to 54c, the first guide piece 53a is provided on the inner side in the axial direction of the inner diameter side plate portion 57b that constitutes the mounting portion 51. As shown in FIG. The guide piece 54a is inclined radially inward as it extends axially inward. Therefore, by inserting the constant width portion 33 in the axial direction along the guide piece 54a, the gap between the outer diameter side plate portion 57a and the inner diameter side plate portion 57b is elastically expanded (the inner diameter side plate portion 57b is pushed radially inward). can be flexurally deformed).

Of the three guide pieces 54a to 54c, the second and third guide pieces 54b and 54c are aligned with the respective axes of the connecting plate portion 58 forming the mounting portion 51 and the strut portion 64 forming the circumferential pressing portion 53. It is provided in the direction inside part. Therefore, the guide pieces 54b and 54c are spaced apart in the circumferential direction. Further, the guide pieces 54b and 54c are inclined in a direction away from each other in the circumferential direction (outer in the circumferential direction) toward the inner side in the axial direction. Therefore, by inserting the constant width portion 33 in the axial direction along the guide pieces 54b and 54c, the gap between the connecting plate portion 58 and the strut portion 64 is elastically expanded, and the connecting plate portion 58 and the strut portion 64 can be elastically expanded (stretching portion 64 is flexurally deformed toward the outlet side).

《Stopper part》
The stopper portion 55 is a portion that prevents the pad clip 14 from moving too far inward in the axial direction with respect to the anchor 31 when the constant width portion 33 is inserted inside the mounting portion 51 . It is provided on the directional outer side. The stopper portion 55 is provided at an axially outer edge portion of the inner diameter side plate portion 57 b that constitutes the mounting portion 51 . The stopper portion 55 extends radially outward so as to be bent substantially at right angles to the inner diameter side plate portion 57 b , and has its axial inner side face abutted (opposed) to the axially outer end face of the constant width portion 33 . ing.

《Engaging Claw》
The engaging claw 56 is a portion that prevents the pad clip 14 from coming off the anchor 31 and is provided on the radially inner portion of the pad clip 14 . The engaging claw 56 is formed by forming a substantially U-shaped cut in the axially inner portion of the inner diameter side plate portion 57b constituting the mounting portion 51, and bending the portion existing inside the cut radially outward. It is As shown in FIGS. 9 and 15 , the engaging claw 56 is axially attached to a stepped engaged portion 67 formed on the radially inner surface of the anchor 31 with the pad clip 14 attached to the anchor 31 . Engage from the inside. This prevents the pad clip 14 from slipping off the anchor 31 to the outside in the axial direction. As the engaged portion of the anchor 31, a step, a groove, a notch, or the like generated when the anchor 31 (cylinder unit 19) is cast can be used.

《Spring holder》
The pad clip 14 of this example further comprises a spring retainer 68 for retaining the return spring 15 against the pad clip 14 . The spring holding portion 68 is composed of a pair of holding pieces 69a and 69b spaced apart in the axial direction. Of the pair of holding pieces 69a and 69b, the holding piece 69a arranged on the inner side in the axial direction forms a substantially U-shaped cut in the outer diameter side plate portion 57a that constitutes the mounting portion 51. It is constructed by bending the existing portion outward in the radial direction. A tip portion of the holding piece 69a is provided with a return portion 70 that is bent inward in the axial direction at a substantially right angle with respect to the holding piece 69a. The axially outer holding piece 69b is provided at the axially outer edge portion of the outer diameter side plate portion 57a. The holding piece 69b extends radially outward so as to be bent substantially at right angles to the outer diameter side plate portion 57a.

<Mounting condition of pad clip>
In the mounting state of the pad clip 14 (the assembled state of the floating type disc brake 1a), the pair of radial pressing portions 52a and 52b bends (elastically deforms) the bending portions 60a and 60b, and the yoke 3a is arranged radially inside the bridge portion 37 (accommodating concave portion 39) that constitutes the . Therefore, the pressing projections 62 a and 62 b provided at the tip end portions of the radial pressing portions 52 a and 52 b elastically contact (line contact) the radial inner surface of the bridge portion 37 . As a result, the pad clip 14 pushes the yoke 3a radially outward with respect to the anchor 31 .

The strut portion 64 of the circumferential pressing portion 53 is elastically sandwiched (stretches in the circumferential direction) between the end surface of the constant width portion 33 on the outlet side and the radial inner surface of the radial projection 49b. An anchor pressing portion 65 provided on the radially outer portion of the strut portion 64 presses the constant width portion 33 toward the turn-in side, and a pad pressing portion 66 provided on the radially inner portion of the strut portion 64. presses the outer pad 5a (radial protrusion 49b) toward the outlet side. As a result, both side surfaces of the connecting plate portion 58 in the circumferential direction are brought into contact with the end surface of the constant width portion 33 on the inlet side and the inner side surface of the radial projection 49a in the circumferential direction without a gap.

The stopper portion 55 contacts the axially outer end surface of the anchor 31 and prevents the pad clip 14 from moving axially inwardly with respect to the anchor 31 . Further, the engaging claw 56 engages with the engaged portion 67 provided on the anchor 31 to prevent the pad clip 14 from slipping off (moving) outward in the axial direction.

[Return spring]
The return spring 15 presses the outer pad 5a axially outward, and is a torsion coil spring formed by bending a wire rod made of spring steel such as stainless steel or piano wire. The return spring 15 includes an annular coil portion 71, and a return-side pressing arm portion 72a and a return-side pressing arm portion 72b that are arranged on both sides in the circumferential direction with the coil portion 71 interposed therebetween.

《Coil part》
The coil portion 71 has its center axis oriented radially, and the spring holding portion 68 is inserted into the inner side thereof without rattling in the axial and circumferential directions. be placed. Thereby, the return spring 15 is held immovably with respect to the pad clip 14 in the axial direction and the circumferential direction. Further, the coil portion 71 is prevented from slipping out of the spring holding portion 68 in the radial direction by the return portion 70 provided in the spring holding portion 68 . Therefore, in this example, before the pad clip 14 is attached to the anchor 31, the return spring 15 is held with respect to the pad clip 14 to form an assembly of the pad clip 14 and the return spring 15. . Then, the pad clip 14 and the return spring 15 are attached to the anchor 31 in an assembled state (sub-assembled state).

《Press arm》
Each of the inflow-side pressing arm portion 72a and the outflow-side pressing arm portion 72b has a substantially L-shape, extends outward in the circumferential direction from a proximal end portion connected to the coil portion 71, and extends toward a distal end portion. is bent radially inward at substantially right angles. The distal ends of the insertion-side pressing arm portion 72a and the output-side pressing arm portion 72b elastically contact the axial inner surfaces of the radial projections 49a and 49b provided on the outer pad 5a. As shown in FIG. 13, for example, engaging recesses 73a and 73b recessed in the axial direction are provided on the axial inner surfaces of the radial projections 49a and 49b. Each tip of the pressing arm 72b is engaged with the engaging recesses 73a and 73b. As a result, the contact positions (biasing positions) between the tip portions of the insertion-side pressing arm portion 72a and the output-side pressing arm portion 72b and the radial projections 49a and 49b are prevented from deviating.

In this example, the lengths in the circumferential direction of the turn-in side pressing arm portion 72a and the turn-out side pressing arm portion 72b are different from each other. Specifically, the circumferential length of the turn-in side pressing arm portion 72a disposed on the turn-in side is made shorter than the circumferential length of the turn-out side pressing arm portion 72b disposed on the turn-out side. . As a result, the pressing force applied from the inflow-side pressing arm portion 72a to the inflow-side portion (radial projection 49a) of the outer pad 5a is transferred from the outflow-side pressing arm portion 72b to the outflow-side portion (radial projection 49a) of the outer pad 5a. 49b).

<<Mounting condition of return spring>>
In the mounting state of the return spring 15 (the assembly state of the floating type disc brake 1a), the inflow-side pressing arm portion 72a and the outflow-side pressing arm portion 72b are each flexurally deformed (elastically deformed), and the tip end portions thereof are deformed. The radial projections 49a and 49b provided on the outer pad 5a are brought into elastic contact with the inner side surfaces in the axial direction. As a result, the outer pad 5a is pressed axially outward (away from the rotor 6).

《Explanation of operation of floating type disc brake》
In order to perform braking by the floating type disc brake 1a of this embodiment, pressurized oil is introduced into the hydraulic chamber in the cylinder 8a. As a result, the first piston 25 and the second piston 26 are moved away from each other in the axial direction. Then, the first piston 25 presses the inner pad 4a against the axial inner surface of the rotor 6 from right to left in FIG. At the same time, the second piston 26 presses the inner body 35 from the left side to the right side in FIG. 5 to move the yoke 3a to the right side in FIG. As a result, the outer pad 5a is pressed against the axial outer surface of the rotor 6 via the outer body 36 from left to right in FIG. As a result, the rotor 6 is strongly clamped from both sides in the axial direction for braking.

When the yoke 3a moves axially inward with respect to the support 2a and the cylinder unit 19, the pressing projections 62a and 62b provided on the pad clip 14 and the radial inner surface of the bridge portion 37 move axially. Sliding contact. Further, when the outer pad 5a is moved axially inward and pressed against the axially outer side surface of the rotor 6, the circumferentially outer side surfaces of the connecting plate portion 58 and the strut portion 64 constituting the pad clip 14 and the outer pad 5a Circumferential inner surfaces of the provided radial projections 49a and 49b are in sliding contact with each other in the axial direction. Further, the inflow-side pressing arm portion 72a and the outflow-side pressing arm portion 72b, which constitute the return spring 15, are flexurally deformed.

When the rotor 6 is sandwiched from both sides in the axial direction by the inner pad 4a and the outer pad 5a, a braking tangential force directed in the circumferential direction (outgoing side) acts on the inner pad 4a and the outer pad 5a, respectively. The brake tangential force acting on the inner pad 4a is directly supported by the support 2a. On the other hand, most of the brake tangential force acting on the outer pad 5a is directly supported by the anchor 31. As shown in FIG.

For example, as shown in FIG. 18A, when the rotation direction of the rotor 6 is counterclockwise when the automobile moves forward, the center (centroid) of the friction surface of the lining 45 constituting the outer pad 5a during forward braking. 18, a brake tangential force F1 directed toward the outflow side (left side in FIG. 18A) acts. Therefore, the anchor 31 directly supports the brake tangential force F1 that acts during forward braking based on contact with the radial projection 49a on the insertion side of the outer pad 5a. Here, the contact portion between the radial projection 49a and the constant width portion 33 is located radially outside the line of action of the brake tangential force F1. Therefore, during forward braking, a moment acts on the outer pad 5a to rotate the outer pad 5a clockwise. Such a moment can be supported by the anchor 31 by bringing the radially inner surface of the constant width portion 33 and the outer edge portion (convex curved surface 50) of the back plate 46 into contact with each other. It can also be transmitted to the yoke 3a via the contact portion between the dowel 48 and the receiving hole.

During reverse braking, as shown in FIG. 18(B), a brake tangent to the center of the friction surface of the lining 45 that constitutes the outer pad 5a is directed to the opposite side (to the right in FIG. 18(B)) during forward braking. A force F2 acts. Therefore, the anchor 31 directly supports the brake tangential force F2 that acts during reverse braking based on contact with the radial projection 49b on the side opposite to that during forward braking. The moment based on the brake tangential force F2 acting during reverse braking is also supported by the anchor 31 as in the case of forward braking, or transmitted to the yoke 3a via the contact portion between the dowel 48 and the receiving hole.

When the brake is released, the pressure oil is discharged from the hydraulic chamber of the cylinder 8a. As a result, the first piston 25 is pulled back (rolled back) into the internal space by the elasticity of the sealing member 29a arranged around the first piston 25 . Similarly, the second piston 26 is also pulled back into the internal space by the elasticity of the sealing member 29b arranged around the second piston 26 . Further, the outer pad 5a and the yoke 3a are moved axially outward by the elastic restoring force of the return-in side pressing arm portion 72a and the return-side pressing arm portion 72b that constitute the return spring 15. As shown in FIG. As a result, a gap is secured between the lining 45 of the outer pad 5 a and the rotor 6 and a gap is secured between the lining 42 of the inner pad 4 a and the rotor 6 .

According to the floating type disc brake 1a of this example as described above, the posture of the yoke 3a that supports the outer pad 5a can be stabilized.
In this example, during forward braking and reverse braking, radial projections 49a and 49b provided on the outer pad 5a are brought into contact with anchors 31 provided in a cantilevered beam on the cylinder 8a, thereby acting on the outer pad 5a. The braking tangential forces F1, F2 applied can be directly supported by the anchor 31. Therefore, it is possible to reduce the rate at which the brake tangential forces F1 and F2 are transmitted to the yoke 3a through the contact portions between the dowels 48 and the receiving holes. Therefore, it is possible to effectively prevent the yoke 3a from tilting. Further, in this example, the pad clip 14 attached to the anchor 31 applies a radially outward force (push-up force) to the yoke 3a. Thereby, the inner peripheral surface of the slide hole 10a is pressed against the outer peripheral surface of the slide pin 9a, and the support rigidity of the yoke 3a with respect to the slide pin 9a can be improved. As a result, the posture of the yoke 3a can be stabilized, and vibration of the yoke 3a and the outer pad 5a can be suppressed when the automobile is running. In addition, it is possible to suppress uneven wear of the lining 45 that constitutes the outer pad 5a, and it is possible to suppress the occurrence of noise such as squeal during braking.

By pushing up the yoke 3a radially outward with respect to the anchor 31 with the pad clip 14, the outer pad 5a supported by the outer body 36 of the yoke 3a is pushed up radially outward, and the outer edge portion of the back plate 46 on the outer diameter side is pushed up. can be pressed against the radial inner surface of the anchor 31 via the inner diameter side plate portion 57 b of the pad clip 14 . Therefore, the vibration of the yoke 3a and the outer pad 5a can be effectively suppressed, and the generation of abnormal noise (rattle noise) can be prevented.

In addition, by providing the bent portions 60a and 60b at the intermediate portions of the radial direction pressing portions 52a and 52b, the pressing convex portions 62a and 62b provided at the tip portions of the radial direction pressing portions 52a and 52b can be used as anchors 31. Since the pad clips 14 are arranged at overlapping positions in the radial direction, the circumferential width of the pad clip 14 can be made compact, and a large pressing force can be stably applied to the yoke 3a. In addition, since the vibration generated in the yoke 3a can be absorbed by the deformation of the bent portions 60a and 60b, it is possible to effectively prevent the concentration of stress on a portion of the radial pressing portions 52a and 52b.

Since the outer surfaces of the pressing protrusions 62a and 62b are contoured in a convex circular arc shape, the contact area between the pressing protrusions 62a and 62b and the radially inner side surface of the yoke 3a can be reduced, and the yoke 3a can be pressed during braking. The acting resistance (sliding resistance) can be kept small. In addition, since the longitudinal direction of the pressing projections 62a and 62b is aligned with the axial direction, which is the moving direction of the yoke 3a, the contact state (line contact) between the pressing projections 62a and 62b and the radial inner surface of the yoke 3a contact state) can be stabilized.

Before the braking is performed, both side surfaces of the connecting plate portion 58 in the circumferential direction, the end surface of the constant width portion 33 on the turn-in side, and the radial projection 49a in the circumferential direction are compressed by the strut portion 64 that constitutes the circumferential pressing portion 53. Since the inner side surfaces can be kept in contact with each other without a gap, it is possible to prevent the outer pad 5a from moving to the outflow side during forward braking. Therefore, it is possible to prevent abnormal noise (cronking noise) from occurring during forward braking.

In addition, by providing the guide pieces 54a to 54c in the pad clip 14, when the constant width portion 33 of the anchor 31 is inserted inside the mounting portion 51, the gap between the outer diameter side plate portion 57a and the inner diameter side plate portion 57b is elastically adjusted. It is possible to elastically push and widen the gap between the connecting plate portion 58 and the strut portion 64 . Therefore, the workability of attaching the pad clip 14 can be improved.

In addition, since the pad clip 14 is provided with the stopper portion 55 , it is possible to prevent the pad clip 14 from moving too far inward in the axial direction with respect to the anchor 31 during the mounting operation of the pad clip 14 . Therefore, the contact positions between the pressing projections 62a and 62b and the yoke 3a can be properly regulated, and the contact positions between the circumferential pressing portion 53 and the outer pad 5a (radial projection 49b) can be properly regulated. Therefore, the desired pressing force can be applied by the radial pressing portions 52 a and 52 b and the circumferential pressing portion 53 .

Since the engaging claw 56 provided on the pad clip 14 and the engaged portion 67 provided on the anchor 31 are engaged in the axial direction, the pad clip 14 does not come off the anchor 31 axially outward. can be prevented. Therefore, it is possible to effectively prevent the pad clip 14 from falling off from the anchor 31 regardless of the vibrations applied during running on rough roads. In this example, the stopper portion 55 and the engaging claw 56 can prevent the pad clip 14 from moving in the axial direction with respect to the anchor 31. It is possible to prevent the axial position of the pad clip 14 from changing regardless of the sliding.

The return spring 15 held by the pad clip 14 allows the outer pad 5a and the yoke 3a to move outward in the axial direction when braking is released. Therefore, a gap can be secured between the lining 45 of the outer pad 5 a and the rotor 6 . Therefore, drag resistance can be reduced.

Further, in this example, the magnitude of the pressing force applied from the return spring 15 to the inflow side portion (radial projection 49a) of the outer pad 5a is adjusted from the return spring 15 to the outflow side portion (radial projection 49b) of the outer pad 5a. It is made larger than the magnitude of the applied pressing force. As a result, the inlet side portion of the outer pad 5a, which tends to increase sliding resistance, can be separated from the rotor 6, which is advantageous in reducing the sliding resistance.

[Second example of embodiment]
A second example of the embodiment will be described with reference to FIGS. 19 and 20. FIG.

The pad clip 14a used in this example differs from the structure of the first example of the embodiment only in the shape of the pressing projections 62c and 62d provided at the respective distal ends of the radial direction pressing portions 52a and 52b.

Specifically, the pressing protrusions 62c and 62d have a hemispherical shell shape in which the contour shape of the outer surface is a convex circular arc shape. Therefore, the pressing protrusions 62c and 62d have a circular shape when viewed from the radial direction, and the axial width and the circumferential width are equal to each other. Therefore, the pressing projections 62c and 62d and the radial inner surface of the bridge portion 37 are elastically in point contact.

In the case of the present example as described above, the contact area between the pressing projections 62c and 62d and the radially inner surface of the yoke 3a (see FIG. 1) can be reduced, and the resistance acting on the yoke 3a during braking ( sliding resistance) can be kept small.
Other configurations and effects are the same as those of the first embodiment described above.

[Third example of embodiment]
A third example of the embodiment will be described with reference to FIGS. 21 and 22. FIG.

The pad clip 14b used in this example differs from the structure of the second example of the embodiment in the shape of the radial direction pressing portions 52c and 52d, except for the pressing protrusions 62c and 62d provided at the distal end portions. .

Each of the radial pressing portions 52c and 52d does not have a bent portion that is folded back in the circumferential direction, and extends over the entire length in directions (outward in the circumferential direction) that separate from each other toward the distal end side. Specifically, each of the radial pressing portions 52c and 52d includes base end plate portions 59a and 59b that extend outward in the circumferential direction and extend radially inward toward the outer side in the circumferential direction. curved plate portions 74a and 74b forming intermediate portions, and tip plate portions 61c and 61d extending outward in the circumferential direction and forming tip portions. In this example, the pressing protrusions 62c and 62d provided in the front half portions of the tip plate portions 61c and 61d are arranged at positions outside both circumferential directions from the anchor 31 (see FIG. 9). Further, the distal plate portions 61c and 61d are arranged radially inward of the proximal plate portions 59a and 59b.

The pad clip 14b has four guide pieces 54a to 54d for guiding the constant width portion 33 into the inside of the mounting portion 51. As shown in FIG. The first to third guide pieces 54a to 54c are provided at the same positions as in the structure of the first example of the embodiment, and the fourth guide piece 54d is positioned circumferentially inward of the radial pressing portions 52c and 52d. It is provided at the axially inner edge of the connecting portion between the ends (base ends) of the . The guide piece 54d is inclined radially outward as it extends axially inward.

In the case of this example as described above, the pressing protrusions 62c and 62d provided at the respective tip end portions of the radial pressing portions 52c and 52d are located on the radial inner surface of the bridge portion 37 constituting the yoke 3a. , the portions that are out of the housing recess 39 (see FIG. 5) on both sides in the circumferential direction are pushed up radially outward. In this example, compared to the structures of the first and second examples of the embodiment, the pressing projections 62c and 62d are far apart in the circumferential direction. can be suppressed (only one side in the circumferential direction is lifted radially outward) due to Further, since the four guide pieces 54a to 54d are provided, the operation of inserting the constant width portion 33 into the mounting portion 51 can be performed more efficiently.
Other configurations and effects are the same as those of the first and second examples of the embodiment.

[Fourth example of embodiment]
A fourth example of the embodiment will be described with reference to FIGS. 23 and 24. FIG.

The pad clip 14c used in this example differs from the structures of the first to third examples of the embodiment in the shape of the radial pressing portion 52e. Only one radial pressing portion 52e is provided and arranged in the axial direction.

Specifically, the radial pressing portion 52e includes a base end plate portion 59c extending axially inward and forming a base portion, and an intermediate portion that is folded back about 180 degrees in the axial direction and is open radially inward. and a tip plate portion 61e extending axially outward and forming a tip portion. The front half of the tip plate portion 61e is provided with a pressing convex portion 62e having a semi-elliptical spherical shell shape, as in the structure of the first embodiment. Further, the pressing convex portion 62e is arranged at a position overlapping the anchor 31 (see FIG. 11) in the radial direction, with the long axis direction being arranged in the circumferential direction and the short axis direction being arranged in the axial direction.

Since the folded portion 78 forming the intermediate portion of the radial pressing portion 52e is folded radially outward with respect to the base end plate portion 59c and then folded back radially inwardly, the entirety of the folded portion 78 is bent toward the base end plate portion 59c. is arranged radially outward of the Further, the distal end plate portion 61e is arranged radially outward of the outer diameter side plate portion 57a that constitutes the base end plate portion 59c and the attachment portion 51. As shown in FIG.

In the case of the present example as described above, the yoke 3a (see FIG. 1) can be pushed up radially outward with respect to the anchor 31 by the pressing convex portion 62e provided at the distal end portion of the radial direction pressing portion 52e. . In addition, in this example, the radial direction pressing portion 52e extends not in the circumferential direction but in the axial direction, and since only one radial pressing portion 52e is provided, the circumferential width of the pad clip 14c can be made compact.
Other configurations and effects are the same as those of the first embodiment.

[Fifth example of embodiment]
A fifth example of the embodiment will be described with reference to FIGS. 25 and 26. FIG.

The pad clip 14d used in this example has only one radial pressing portion 52f, as in the structure of the fourth example of the embodiment. placed in the direction

Specifically, the radial pressing portion 52f is formed from the radially outer end portion of the axially inner half portion of the connecting plate portion 58 that constitutes the mounting portion 51a to the outlet side (FIG. 25(A) and ( (left side of B)), and has a pressing convex portion 62f having a hemispherical shell shape at the tip, as in the structure of the second example of the embodiment. Further, the radial pressing portion 52f is inclined radially outward and has a smaller axial width toward the outlet side.

The outer diameter side plate portion 57a that constitutes the attachment portion 51a is arranged on the opposite side (axially outer side) of the radial direction pressing portion 52f with a substantially J-shaped slit 79 interposed therebetween. width increases. In other words, the radial pressing portion 52f and the outer diameter side plate portion 57a are formed by forming a slit 79 in a rectangular plate portion arranged radially outward of the anchor 31 (see FIG. 11). .

The pad clip 14d of this example has four guide pieces 54a to 54c and 54e for guiding the insertion of the constant width portion 33 inside the mounting portion 51a. The first to third guide pieces 54a to 54c are provided at the same positions as in the structure of the first example of the embodiment. provided at the axially inner edge of the portion. The guide piece 54e is inclined radially outward as it extends axially inward.

The pad clip 14d has a stopper portion 55a for preventing the pad clip 14d from moving too far inward in the axial direction with respect to the anchor 31 at the axially outer edge portion of the outer diameter side plate portion 57a. The stopper portion 55a extends radially inward so as to be bent at a substantially right angle with respect to the outer diameter side plate portion 57a, and its axial inner surface is aligned with the axially outer end surface of the constant width portion 33 (see FIG. 8). Make them abut (oppose).

The pad clip 14d has an engaging claw 56a for preventing the pad clip 14d from slipping off from the anchor 31 axially outward. It is provided at the leading end portion (the radially inner end portion) of the output side plate portion 80 that is bent at right angles. Although not shown, such an engaging claw 56a axially engages with an engaged portion provided on the end face of the anchor 31 on the exit side when the pad clip 14d is attached to the anchor 31. . In this example, the outlet side plate portion 80 is connected to the outlet side end portion of the axially inner portion of the outer diameter side plate portion 57a, and extends from the axially outer portion to the intermediate portion of the outer diameter side plate portion 57a. A circumferential pressing portion 53 (strut portion 64) is connected to the end portion on the outflow side.

Further, the pad clip 14d of this example omits the spring holding portion 68 (see FIG. 8) for holding the return spring 15 (see FIG. 8). That is, the pad clip 14d is attached to the anchor 31 by itself without being used in combination with a return spring.

In this example as described above, since the radial pressing portion 52f does not protrude from the mounting portion 51a in either the circumferential direction or the axial direction, the circumferential width and the axial width of the pad clip 14d are reduced. It can be made compact. For this reason, it can be preferably adopted in a structure in which the installation space for the pad clip 14d is restricted.
Other configurations and effects are the same as those of the first embodiment described above.

The present invention can be carried out by appropriately combining the structures of the respective examples of the embodiments as long as there is no contradiction.

When carrying out the present invention, the number of radial pressing portions provided in the pad clip, the shape of the radial pressing portions (stretching direction, bending direction), etc. are not limited to the structure of the embodiment. It can be changed as appropriate as long as the function of pushing up radially outward can be exhibited. Further, the guide piece, the stopper portion, and the engaging claw can be provided in the pad clip as required, or can be omitted. Further, even when guide pieces, stopper portions, and engaging claws are provided, the number and installation positions thereof are not limited to the structure of the embodiment, and may be changed as appropriate as long as each function can be exhibited. be able to.

Reference Signs List 1, 1a Floating type disc brake 2, 2a Support 3, 3a Yoke 4, 4a Inner pad 5, 5a Outer pad 6 Rotor 7 Claw 8, 8a Cylinder 9, 9a Slide pin 10, 10a Slide hole 11 Pad spring 12 Dowel 13 Receptacle Holes 14, 14a to 14d Pad clip 15 Return spring 16 Support base 17 Support arm 18 Mounting hole 19 Cylinder unit 20 Fastening hole 21 Engagement recess 22 Cylinder arm 23 Piping port 24 Bleeder 25 First piston 26 Second piston 27a, 27b Boot 28a, 28b Small diameter portion 29a, 29b Seal member 30 Insertion hole 31 Anchor 32 Tapered portion 33 Constant width portion 34 Relief recess 35 Inner body 36 Outer body 37 Bridge portion 38 Support hole 39 Storage recess 40 Inner window 41 Outer window 42 Lining 43 Back plate 44 Ear portion 45 Lining 46 Back plate 47 Pad spring 48 Dowels 49a, 49b Radial projection 50 Convex curved surface 51, 51a Mounting portion 52a to 52f Radial pressing portion 53 Circumferential pressing portion 54a to 54e Guide piece 55, 55a stopper portion 56, 56a engaging claw 57a outer diameter side plate portion 57b inner diameter side plate portion 58 connecting plate portion 59a to 59c base end plate portion 60a, 60b bending portion 61a to 61e tip plate portion 62a to 62f pressing convex portion 63 curved portion 64 Strut portion 65 Anchor pressing portion 66 Pad pressing portion 67 Engaged portion 68 Spring holding portion 69a, 69b Holding piece 70 Return portion 71 Coil portion 72a Incoming side pushing arm portion 72b Outgoing side pushing arm portion 73a, 73b Engaging concave portion 74a, 74b curved plate portion 78 folded portion 79 slit 80 turn-out side plate portion

Claims (18)

A pad clip made of a metal plate and attached to a cantilever-like anchor provided on a fixed member, which bears the brake tangential force acting on the outer pad during braking and is arranged radially outward of the rotor. ,
a radial pressing portion that is supported axially movably with respect to the fixed member and that presses a yoke radially outward with respect to the anchor for pressing the outer pad against the axial outer surface of the rotor during braking; Provided with pad clip. 2. The pad clip of claim 1, wherein said pad clip further comprises an attachment portion for attachment to said anchor. 3. The pad according to claim 2, wherein the radial pressing portion is connected to the axially inner portion of the mounting portion, and has a substantially U-shaped bending portion at an intermediate portion that is open on the radially outer side. clip. 4. The radial pressing portion according to any one of claims 1 to 3, wherein at least a tip portion of the radial pressing portion that contacts a radial inner surface of the yoke is arranged at a position overlapping the anchor in the radial direction. pad clip. 5. The radial pressing portion has a pressing convex portion, which is bent so as to be convex radially outward, at a tip end contacting the radial inner surface of the yoke. or the pad clip described in paragraph 1. The pad according to any one of claims 1 to 5, wherein the pad clip includes two radial pressing portions, each radial pressing portion being arranged in the circumferential direction. clip. The pad clip according to any one of claims 1 to 6, further comprising a circumferential pressing portion for pressing the outer pad toward the outlet side. The circumferential pressing portion has a strut portion that struts between the circumferential side surfaces of the anchor and the outer pad, and the strut portion serves as an anchor pressing portion that presses the anchor toward the turn-in side. 8. The pad clip according to claim 7, further comprising a pad pressing portion provided on the radially outer side and pressing the outer pad toward the outlet side on the radially inner side. 9. The pad clip according to claim 8, wherein the circumferential pressing portion has a substantially semi-cylindrical curved portion with an open radially inner side that connects to the radially outer portion of the strut portion. 10. The pad clip according to any one of claims 1 to 9, further comprising a stopper portion on an axially outer portion for preventing excessive axially inward movement with respect to the anchor. Pad clip as noted. The pad according to any one of claims 1 to 10, wherein the pad clip further comprises an engaging claw for preventing the pad clip from falling off from the anchor by engaging with the anchor. clip. 3. The pad clip further comprises at least two or more guide pieces axially inward of the mounting portion for guiding the end of the anchor to the inside of the mounting portion. A pad clip as claimed in any one of claims 3 to 11 depending on claim 2. 13. The pad clip of claim 12, wherein the guide pieces are circumferentially spaced apart. A pad clip according to any one of claims 1 to 13, and a wire return spring for pressing the outer pad or the yoke axially outward, wherein the return spring is: A pad clip and return spring assembly retained against the pad clip. The pad clip further includes a spring retainer for retaining the return spring, the return spring includes an annular coil portion, and the spring retainer is inserted inside the coil portion. 15. The pad clip and return spring assembly of claim 14, wherein the pad clip and return spring assembly is held against the pad clip by doing so. 16. The pad clip and return spring assembly of claim 15, wherein the spring retainer includes a barb that prevents the return spring from exiting radially outward. The return spring includes a turn-in side pressing arm for pressing the turn-in side portion of the pad clip or the yoke axially outward, and a turn-out side portion of the pad clip or the yoke that is pushed axially outward. and an output-side pressing arm for pressing toward, wherein the pressing force of the input-side pressing arm is greater than the pressing force of the output-side pressing arm. 17. The pad clip and return spring assembly of any one of Claims 1-16. an outer pad arranged axially outside the rotor;
an inner pad arranged axially inside the rotor;
a fixing member disposed axially inside the rotor, supporting the inner pad so as to be axially movable, and fixed to the vehicle body;
a yoke that is axially movably supported with respect to the fixing member while supporting the outer pad;
A floating disc brake,
a pad clip made of a metal plate that presses the yoke;
a return spring made of wire that presses the outer pad or the yoke axially outward,
The fixing member has a cantilever-shaped anchor that supports a brake tangential force acting on the outer pad during braking and is arranged radially outward of the rotor,
A floating type disc brake, wherein the pad clip and the return spring are a pad clip and return spring assembly according to any one of claims 14-17.

Images