caliper

Abstract

To obtain a caliper which enables reduction of the weight as one example.SOLUTION: As one example, a caliper according to an embodiment includes: a caliper body having two walls which are disposed spaced apart from each other in a first direction; brake pads located between the two walls; and pins which protrude from at least one of the two walls and may support the brake pad in a manner that the brake pads may move in the first direction. The brake pad is supported by the pins to be restricted from moving in a second direction orthogonal to the first direction and is supported by a component different from the pins to be restricted from moving in a third direction opposite to the second direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] SUMMARY OF THE INVENTION An embodiment of the present invention relates to a caliper. [Background technology]

[0002] Conventionally, disc brake calipers have pins that guide the brake pads. The pins are fitted into holes in the brake pads to support the brake pads so that they can move axially. Furthermore, the pins limit the movement of the brake pads in the radial direction (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2011-529162 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional configurations, the pins limit both radial inward and radial outward movement of the brake pads. Because repeated loads act on the pins, calipers are generally provided with pins with high strength. However, the stronger the pins, the heavier they tend to be, leaving room for improvement in reducing the weight of calipers.

[0005] Therefore, the present invention has been made in view of the above, and provides a caliper that can be made lighter. [Means for solving the problem]

[0006] The caliper according to the embodiment of the present invention may include, for example, two walls spaced apart from each other in a first direction. a bridge formed integrally with the two walls; and a flat support surface provided on the bridge. a brake pad positioned between the two walls; and a pin protruding from at least one of the two walls and supporting the brake pad movably in the first direction, wherein the brake pad is a flat abutment portion facing the support surface and positioned between the pin and the bridge; The movement of the pin is restricted by being supported by the pin so as to be in a second direction perpendicular to the first direction, and the movement of the pin is restricted by being supported by the pin so as to be in a third direction opposite to the second direction. The abutment portion is in surface contact with the support surface, and the bridge Therefore, for example, the strength of the pin can be reduced, which in turn makes the pin lighter. Therefore, the caliper can be made lighter. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view schematically illustrating a disc brake according to one embodiment. [Figure 2] FIG. 2 is a cross-sectional view that schematically shows the disc brake of this embodiment. [Figure 3] FIG. 3 is a bottom view showing the caliper of this embodiment. [Figure 4] FIG. 4 is a bottom view showing the caliper body of the present embodiment. [Figure 5] FIG. 5 is a cross-sectional view schematically showing a part of the caliper of this embodiment taken along line F5-F5 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment will be described below with reference to FIGS. 1 to 5. In this specification, components according to the embodiment and descriptions of the components may be described using multiple expressions. The components and their descriptions are merely examples and are not limited by the expressions in this specification. The components may also be identified by names different from those in this specification. Furthermore, the components may also be described using expressions different from those in this specification.

[0009] FIG. 1 is a perspective view schematically illustrating a disc brake 10 according to one embodiment. The disc brake 10 according to this embodiment is, for example, a piston-opposed disc brake. However, the disc brake 10 may be another type of disc brake. The disc brake 10 includes a disc rotor 11 and a caliper 12.

[0010] Fig. 2 is a cross-sectional view showing a schematic view of the disc brake 10 of this embodiment. As shown in Fig. 2, the disc rotor 11 is formed in a disk shape that is substantially perpendicular to the rotation axis Ax. The rotation axis Ax is, for example, the central axis of the axle of a vehicle on which the disc brake 10 is mounted. However, the rotation axis Ax is not limited to this example.

[0011] For convenience, the axial direction, radial direction, and circumferential direction of the rotation axis Ax are defined herein. The axial direction is a direction parallel to the rotation axis Ax and is an example of a first direction. The radial direction is a direction perpendicular to the rotation axis Ax. In other words, the radial direction is a direction perpendicular to the axial direction. The circumferential direction is a direction of rotation around the rotation axis Ax.

[0012] In this specification, one radial side is defined as the radially inner side, and the other radial side is defined as the radially outer side. The radially inner side is the radial direction toward the rotation axis Ax and is an example of the second direction. The radially outer side is the opposite direction of the radially inner side and is an example of the third direction.

[0013] The disc rotor 11 is connected to the axle by, for example, bolts and nuts. This allows the disc rotor 11 to rotate integrally with the axle around the rotation axis Ax. In other words, the disc rotor 11 is rotatable in the circumferential direction.

[0014] 3 is a bottom view showing the caliper 12 of this embodiment. As shown in FIG. 3, the caliper 12 has a caliper body 21, a plurality of pistons 22, two brake pads 23, four pins 24, and a biasing member 25.

[0015] The caliper body 21 is fixed to, for example, the body of the vehicle, so that the disc rotor 11 is rotatable relative to the caliper body 21. Note that the caliper body 21 may be fixed to another location.

[0016] The caliper body 21 is made of metal, for example, by casting. However, the caliper body 21 may be made of other materials and by other methods. As shown in Fig. 1, the caliper body 21 has two side walls 31, two outer walls 32, and a bridge 33. The side walls 31 are an example of a wall.

[0017] The two side walls 31 are spaced apart from each other in the axial direction. The disc rotor 11 is disposed between the two side walls 31. The two side walls 31 cover a portion of the disc rotor 11 in the axial direction.

[0018] As shown in Figure 3, each of the two side walls 31 has an inner surface 31a. The inner surface 31a is formed to be substantially flat and faces the axial direction. The inner surfaces 31a of the two side walls 31 face each other with a gap between them. The inner surfaces 31a face the disk rotor 11 between the two side walls 31 with the gap between them.

[0019] 1, the two outer walls 32 are spaced apart from each other in the circumferential direction. Each of the two outer walls 32 is disposed between and connected to the two side walls 31. In other words, the caliper body 21 is formed so as to straddle a portion of the disc rotor 11.

[0020] An opening 35 is formed between the two outer walls 32 in the circumferential direction. The opening 35 is a hole that opens in the radial direction. The opening 35 is surrounded by the two side walls 31 and the two outer walls 32, and is formed (defined, partitioned) by the two side walls 31 and the two outer walls 32.

[0021] The outer walls 32 are spaced radially outward from the disc rotor 11 and extend along the outer edge of the disc rotor 11. Each of the two outer walls 32 covers a portion of the disc rotor 11 in the radial direction.

[0022] The bridge 33 is provided on the caliper body 21 between the two outer walls 32 in the circumferential direction. Therefore, the bridge 33 is disposed in the opening 35. The bridge 33 is spaced apart from the two outer walls 32 in the circumferential direction. The bridge 33 extends in the axial direction and is connected to the two side walls 31.

[0023] 4 is a bottom view showing the caliper body 21 of this embodiment. As shown in FIG. 4, the bridge 33 has a support surface 36 and a protrusion 37. The support surface 36 is formed to be substantially flat and faces radially inward. The protrusion 37 protrudes radially inward from the support surface 36. The protrusion 37 is located approximately at the center of the support surface 36 in the axial direction and is spaced apart from the two side walls 31.

[0024] The support surface 36 is subjected to machining, such as polishing, so that the surface roughness of the support surface 36 is lower than the surface roughness of the inner surface 31a of the side wall 31. However, the surface roughness of the support surface 36 is not limited to this example.

[0025] 3, the pistons 22 are housed, for example, in each of the two side walls 31 of the caliper body 21. Therefore, the disc rotor 11 is disposed between the pistons 22 housed in one side wall 31 and the pistons 22 housed in the other side wall 31. The caliper body 21 holds the pistons 22 so that they can move in the axial direction.

[0026] The brake pads 23 are disposed inside the caliper body 21. Note that a portion of the brake pads 23 may be located outside the caliper body 21. The two brake pads 23 are disposed axially spaced apart from each other between the two side walls 31. The disc rotor 11 is disposed between the two brake pads 23 in the axial direction.

[0027] As shown in Fig. 2, each of the two brake pads 23 has a back plate 41 and a lining 42. The back plate 41 is formed in a plate shape that is approximately perpendicular to the axial direction. The lining 42 is a friction material fixed to the back plate 41. The lining 42 is disposed between the back plate 41 and the disc rotor 11.

[0028] The back plate 41 has two side edges 45, an inner edge 46, and an outer edge 47. The side edges 45 form both circumferential ends of the back plate 41 and face in the circumferential direction. The inner edge 46 forms the radially inner end of the back plate 41 and faces inward in the radial direction. The outer edge 47 is located opposite the inner edge 46. The outer edge 47 forms the radially outer end of the back plate 41.

[0029] The outer edge 47 has two first contact portions 47a and two second contact portions 47b. The first contact portions 47a are provided at positions spaced apart from each other in the circumferential direction. In this embodiment, the first contact portions 47a are adjacent to the side edge 45. The first contact portions 47a are formed substantially flat and face outward in the radial direction. The second contact portions 47b are located between the two first contact portions 47a in the circumferential direction. The second contact portions 47b may be provided at positions spaced apart from each other in the circumferential direction as shown in FIG. 2, or may be integrated into a continuous shape in the circumferential direction, for example. The second contact portions 47b are formed substantially flat and face outward in the radial direction.

[0030] The first contact portion 47a is exposed to the outside of the caliper body 21 through the opening 35. The second contact portion 47b is covered by the bridge 33. The second contact portion 47b and the support surface 36 of the bridge 33 face each other.

[0031] The second contact portion 47b and the support surface 36 are formed substantially parallel to each other. In other words, the support surface 36 extends along the second contact portion 47b. The area of ​​the support surface 36 is larger than the area of ​​the second contact portion 47b. Note that the second contact portion 47b and the support surface 36 are not limited to this example.

[0032] Two notches 49 are provided in the back plate 41. The notches 49 are provided at corners between the side edge 45 and the inner edge 46. The notches 49 penetrate the back plate 41 in the axial direction and open to the side edge 45 and the inner edge 46. Therefore, the notches 49 are open radially inward.

[0033] The back plate 41 further has a side edge 49a and an inner edge 49b of the cutout 49. The side edge 49a extends radially outward from the end of the inner edge 46 in the circumferential direction. The inner edge 49b is connected to the end of the side edge 45 on the radially inner side and the side edge 49a of the cutout 49. The inner edge 49b faces radially inward.

[0034] A portion of the back plate 41 is housed in the opening 35 of the caliper body 21. A portion of the side edge 45 faces the outer wall 32 of the caliper body 21. During braking, the outer wall 32 abuts against the side edge 45 and receives braking torque transmitted from the side edge 45.

[0035] Fig. 5 is a cross-sectional view schematically showing a part of the caliper 12 of this embodiment taken along line F5-F5 in Fig. 3. As shown in Fig. 5, each of the four pins 24 has a male thread portion 24a, a head portion 24b, and a pillar portion 24c.

[0036] The male thread portion 24a is formed in a generally cylindrical shape extending in the axial direction. The male thread portion 24a is fitted into a threaded hole 31b provided in the side wall 31. The threaded hole 31b passes through the side wall 31 in the axial direction and opens to the inner surface 31a.

[0037] A male screw is provided on the outer surface of the male screw portion 24a. Furthermore, a female screw is provided on the inner surface of the screw hole 31b. The male screw of the male screw portion 24a and the female screw of the screw hole 31b fit together. In this way, the pin 24 is attached to the side wall 31. Note that the pin 24 may be attached to the side wall 31 by other methods such as press fitting, or may be formed integrally with the side wall 31.

[0038] The head 24b is provided at one end of the male thread portion 24a in the axial direction. The pillar portion 24c is provided at the other end of the male thread portion 24a in the axial direction. The pillar portion 24c is formed in a substantially cylindrical shape extending in the axial direction. Note that the pillar portion 24c may be formed in another shape, such as a square pillar. The pillar portion 24c protrudes from the inner surface 31a of the side wall 31. The end face of the pillar portion 24c in the axial direction faces the disc rotor 11 and is spaced apart from the disc rotor 11.

[0039] Two of the four pins 24 protrude from the inner surface 31a of one side wall 31 and are spaced apart from the other side wall 31. The other two of the four pins 24 are spaced apart from one side wall 31 and protrude from the inner surface 31a of the other side wall 31.

[0040] The two pins 24 protruding from one side wall 31 and the two pins 24 protruding from the other side wall 31 are arranged in a mirror symmetrical manner in the axial direction. For this reason, the following description will be given representatively of the two pins 24 protruding from one side wall 31. Note that the positions of the two pins 24 protruding from one side wall 31 and the two pins 24 protruding from the other side wall 31 are not limited to being mirror symmetrical.

[0041] 2, the two pins 24 are spaced apart from each other in the circumferential direction. The two pins 24 are spaced apart radially inward from the bridge 33. In other words, the distance between the rotation axis Ax and the pins 24 is shorter than the distance between the rotation axis Ax and the bridge 33. The two pins 24 extend axially through two notches 49 in the back plate 41.

[0042] A side edge 49a of the notch 49 is located between the two pins 24. The side edge 49a is spaced apart from the pins 24. Furthermore, an inner edge 49b of the notch 49 is located between the pins 24 and the bridge 33 in the radial direction. Therefore, the brake pad 23 is located between the pins 24 and the bridge 33 in the radial direction.

[0043] The inner edge 49b faces the pillar portion 24c of the pin 24. The pillar portion 24c abuts against the inner edge 49b, thereby supporting the brake pad 23 so that it can move in the axial and circumferential directions. The pin 24 may indirectly support the brake pad 23 via another member. The brake pad 23 is supported by the pin 24, so that its movement inward in the radial direction is restricted.

[0044] The piston 22 pushes the brake pad 23 in the axial direction in response to, for example, the driver's operation. When pushed by the piston 22, the brake pad 23 moves in the axial direction along the pin 24, bringing the lining 42 into contact with the disc rotor 11. The brake pad 23 pushed by the piston 22 presses against the disc rotor 11. As a result, the brake pad 23 generates a braking force on the disc rotor 11.

[0045] The biasing member 25 is manufactured by, for example, bending a blank obtained by punching a leaf spring into a predetermined shape. That is, the biasing member 25 is made of an elastic metal. However, the biasing member 25 is not limited to this example. The biasing member 25 has an intermediate portion 51 and two pressing portions 52. The intermediate portion 51 and the pressing portions 52 are integrally formed.

[0046] The intermediate portion 51 is formed in a substantially flat plate shape. The intermediate portion 51 is supported by the support surface 36 of the bridge 33. As shown in FIG. 3 , the length of the intermediate portion 51 in the axial direction is shorter than the length of the support surface 36 in the axial direction.

[0047] A hole 55 is provided in the intermediate portion 51. The hole 55 penetrates the intermediate portion 51 in the radial direction. The protrusion 37 fits into the hole 55. The protrusion 37 abuts against the edge of the hole 55 in the axial direction, thereby restricting the axial movement of the biasing member 25.

[0048] The intermediate portion 51 is disposed at approximately the center of the support surface 36 in the axial direction by the protrusion 37. The intermediate portion 51 is spaced apart from the two side walls 31. Therefore, a part of the support surface 36 is exposed between the side walls 31 and the intermediate portion 51.

[0049] The back plate 41 is located between the side wall 31 and the intermediate portion 51 in the axial direction. Therefore, the second abutment portion 47b of the outer edge 47 of the back plate 41 faces the support surface 36 through the gap between the side wall 31 and the intermediate portion 51. Note that the second abutment portion 47b may face the intermediate portion 51.

[0050] The two pressing portions 52 extend from both ends of the intermediate portion 51 in the circumferential direction. The pressing portions 52 elastically deform and come into contact with the first contact portions 47a on the outer edge 47 of the back plate 41. As a result, the biasing members 25 are supported by the support surfaces 36 and bias (press) the brake pads 23 radially inward.

[0051] In a natural state where no external force is acting on the brake pad 23, the brake pad 23 is pressed by the pressing portion 52 and abuts against the pin 24. The brake pad 23 is supported by the pin 24. Furthermore, the second abutment portion 47b of the outer edge 47 of the back plate 41 is spaced apart from the support surface 36 of the bridge 33.

[0052] For example, due to vibration or inertia of the vehicle, the brake pads 23 may move radially relative to the caliper body 21. The pins 24 and the bridges 33 limit the radial movement of the brake pads 23 beyond a predetermined range.

[0053] When the brake pads 23 attempt to move radially outward, the elastic force of the biasing members 25 restricts the movement of the brake pads 23. When the force acting on the brake pads 23 exceeds the elastic force of the biasing members 25, the brake pads 23 move radially outward.

[0054] When the brake pads 23 move radially outward, the second abutment portions 47b of the outer edges 47 of the backing plates 41 come into contact with the support surfaces 36 of the bridges 33. By coming into contact with the second abutment portions 47b, the support surfaces 36 support the brake pads 23 and restrict further radial outward movement of the brake pads 23.

[0055] When the brake pads 23 move radially inward, the inner edges 49b of the notches 49 in the back plate 41 come into contact with the pillar portions 24c of the pins 24. By coming into contact with the inner edges 49b, the pins 24 support the brake pads 23 and restrict further radial inward movement of the brake pads 23.

[0056] As described above, radial inward movement of the brake pads 23 is restricted by being supported by the pins 24. On the other hand, radial outward movement of the brake pads 23 is restricted by being supported by the bridges 33 of the caliper body 21, which are different from the pins 24.

[0057] The pin 24 may have a flat surface that is approximately parallel to the inner edge 49b of the notch 49 of the back plate 41. When the flat surface abuts against the inner edge 49b, the pin 24 and the inner edge 49b can be in line contact or surface contact.

[0058] In this embodiment, the bridge 33 limits the radially outward movement of the brake pad 23. However, other components different from the pin 24 may limit the radially outward movement of the brake pad 23. For example, the biasing member 25, a part of the side wall 31 or the outer wall 32, or a pin different from the pin 24 may limit the radially outward movement of the brake pad 23.

[0059] The caliper 12 of this embodiment is assembled, for example, as follows. Note that the method of assembling the caliper 12 is not limited to the method described below, and other methods may be used. First, the piston 22, the pin 24, and the biasing member 25 are attached to the caliper body 21.

[0060] Next, the brake pad 23 is inserted between the two side walls 31. The brake pad 23 is disposed obliquely so that the second abutment portion 47b of the outer edge 47 of the back plate 41 faces the support surface 36 and the inner edge 46 and the notches 49 of the back plate 41 are spaced apart from the four pins 24. At this time, the first abutment portion 47a of the outer edge 47 of the back plate 41 abuts against the pressing portion 52 of the biasing member 25. However, the inner edges 49b of the notches 49 are located radially inward of the pins 24.

[0061] Next, the brake pad 23 is moved closer to the bridge 33 while elastically deforming the pressing portion 52 of the biasing member 25. As a result, the inner edge 49b of the notch 49 is positioned radially outward of the pin 24. At this time, the second abutment portion 47b of the outer edge 47 of the back plate 41 may abut against the support surface 36 or may be spaced apart from the support surface 36.

[0062] Next, the brake pad 23 is rotated so that the inner edge 46 of the back plate 41 approaches the side wall 31. As a result, the pin 24 is inserted into the notch 49 of the back plate 41. The brake pad 23 is moved radially inward by the biasing member 25, and the inner edge 49b abuts against the pin 24. This completes the assembly of the caliper 12.

[0063] In the caliper 12 according to the embodiment described above, the brake pad 23 is restricted from moving radially inward in a direction perpendicular to the axial direction by being supported by the pin 24. Furthermore, the brake pad 23 is restricted from moving radially outward by being supported by a component (bridge 33) different from the pin 24. This reduces the number of times (frequency, number of vibrations) the pin 24 supports the brake pad 23 compared to a case in which both the radially inward and radially outward movement of the brake pad 23 are restricted. In other words, the pin 24 can reduce the number of times vibrations are input from the brake pad 23. The caliper 12 according to this embodiment reduces the vibrations input to the pin 24, allowing for the use of lightweight pins 24 that have relatively low strength. For example, the caliper 12 can use pins 24 with a small diameter. In other words, the caliper 12 according to this embodiment allows for the strength of the pins 24 to be reduced, thereby reducing the weight of the pins 24. Therefore, the caliper 12 can be made lighter. Furthermore, the biasing member 25 does not need a high Young's modulus to suppress vibration of the brake pad 23, and the sliding resistance between the brake pad 23 and the pin 24 is reduced, which in turn can suppress a decrease in fuel efficiency of the vehicle.

[0064] The component that limits the radially outward movement of the brake pads 23 includes a bridge 33 provided on the caliper body 21. The brake pads 23 are positioned between the pins 24 and the bridge 33, and are supported by the bridge 33 to limit their radially outward movement. The bridge 33 is connected to the two side walls 31. Connecting the bridge 33 to the two side walls 31 improves the rigidity of the caliper body 21. That is, the bridge 33 can be used both to improve the rigidity of the caliper body 21 and to limit the movement of the brake pads 23. Therefore, the caliper 12 of this embodiment does not need to be provided with any component other than the bridge 33 to limit the movement of the brake pads 23, and an increase in weight can be suppressed.

[0065] The brake pad 23 has an outer edge 47 facing radially outward. The bridge 33 has a support surface 36 that faces the outer edge 47 and that can restrict radially outward movement of the brake pad 23 by abutting against the outer edge 47. In other words, the support surface 36 allows the bridge 33 to come into line contact or surface contact with the brake pad 23. As a result, the caliper 12 of this embodiment can prevent a strong local load due to point contact from acting on the brake pad 23 abutting against the bridge 33, and ultimately prevent deformation of the brake pad 23.

[0066] The biasing member 25 is supported by the support surface 36 and biases the brake pad 23 radially inward. The bridge 33 has a protrusion 37 protruding from the support surface 36. The protrusion 37 fits into a hole 55 provided in the biasing member 25, restricting axial movement of the biasing member 25. In other words, the bridge 33 and the biasing member 25 are positioned by the protrusion 37 protruding from the support surface 36. As a result, the support surface 36 does not need to be provided with a recess for positioning, and the brake pad 23, which has moved axially, can be prevented from fitting into the recess. Therefore, the support surface 36 can support the brake pad 23 at a substantially constant position in the radial direction, regardless of the position of the brake pad 23 in the axial direction.

[0067] The pin 24 protrudes from one of the two side walls 31 and is spaced apart from the other of the two side walls 31. This allows the brake pad 23 to be inserted and removed (replaced) through the gap between the pin 24 and the other side wall 31 without removing the pin 24 from the caliper body 21 (the one of the side walls 31).

[0068] The support surface 36 is machined to have a lower surface roughness than the inner surface 31a of the side wall 31. This allows the radial distance between the support surface 36 and the pin 24 to be set more accurately. Therefore, the caliper 12 of this embodiment can prevent the radial distance between the support surface 36 and the pin 24 from becoming shorter than the radial distance between the second contact portion 47b and the inner edge 49b of the brake pad 23. Furthermore, the range (amplitude) within which the brake pad 23 can move in the radial direction is stabilized.

[0069] The brake pad 23 is provided with a notch 49 that is open radially inward. The pin 24 extends through the notch 49. In other words, the brake pad 23 does not have a portion adjacent to the pin 24 radially inward. This prevents the brake pad 23 from interfering with the pin 24 during installation of the caliper 12 of this embodiment, making it easier to assemble the caliper 12.

[0070] The caliper according to the embodiment described above, for example, includes a caliper body having two walls spaced apart in a first direction, a brake pad positioned between the two walls, and a pin protruding from at least one of the two walls and supporting the brake pad so that it can move in the first direction. The brake pad is restricted from moving in a second direction perpendicular to the first direction by being supported by the pin, and restricted from moving in a third direction opposite the second direction by being supported by a component other than the pin. Therefore, for example, the pin can reduce the number of times (frequency, number of vibrations) that the brake pad is supported compared to a case in which the pin restricts movement of the brake pad in both the second direction and the third direction. In other words, the pin can reduce the number of times vibrations are input from the brake pad. This allows the strength of the pin in the caliper to be reduced, thereby reducing the weight of the pin. Therefore, the caliper can be made lighter.

[0071] In the above caliper, as an example, the component other than the pin includes a bridge that is provided on the caliper body and connected to the two walls, and the brake pad is positioned between the pin and the bridge. Therefore, as an example, the bridge connecting the two walls improves the rigidity of the caliper body. That is, the bridge can be used both to improve the rigidity of the caliper body and to limit the movement of the brake pad. Therefore, the caliper does not need to be provided with a component other than the bridge to limit the movement of the brake pad, and an increase in weight can be suppressed.

[0072] In the above caliper, as an example, the brake pad has an outer edge facing the third direction, and the bridge has a support surface facing the outer edge and abutting against the outer edge to limit movement of the brake pad in the third direction. Therefore, as an example, the bridge can make line contact or surface contact with the brake pad via the support surface. This allows the caliper to prevent a strong local load from being applied to the brake pad abutting against the bridge, thereby preventing deformation of the brake pad.

[0073] As an example, the caliper further includes a biasing member having a hole, supported by the support surface, and biasing the brake pad in the second direction, and the bridge has a protrusion that protrudes from the support surface, fits into the hole, and limits movement of the biasing member in the first direction. Therefore, as an example, the bridge and the biasing member are positioned by the protrusion that protrudes from the support surface. As a result, the support surface does not need to be provided with a recess for positioning, and the brake pad can be supported at a substantially constant position in the radial direction, regardless of the position of the brake pad in the axial direction.

[0074] In the caliper, for example, the pin protrudes from one of the two walls and is spaced apart from the other of the two walls. Therefore, for example, the brake pads can be inserted and removed (replaced) through the gap between the pin and the wall (the other wall) without removing the pin from the caliper body (the one wall). The present invention is particularly useful for such a so-called cantilevered pin.

[0075] In the above description, suppression is defined as, for example, preventing an event, action, or influence from occurring, or reducing the degree of an event, action, or influence. Also, in the above description, restriction is defined as, for example, preventing movement or rotation, or allowing movement or rotation within a predetermined range and preventing movement or rotation beyond the predetermined range.

[0076] While the embodiments of the present invention have been described above, the above-described embodiments and modifications are merely examples and are not intended to limit the scope of the invention. The above-described embodiments and modifications can be implemented in various other forms, and various omissions, substitutions, combinations, and modifications can be made without departing from the spirit of the invention. Furthermore, the configurations and shapes of each embodiment and each modification can be partially interchanged. [Explanation of symbols]

[0077] 12... caliper, 21... caliper body, 23... brake pad, 24... pin, 25... biasing member, 31... side wall (wall), 33... bridge, 36... support surface, 37... protrusion, 47... outer edge, 55... hole.

Claims

1. a caliper body having two walls spaced apart from each other in a first direction, a bridge integrally formed with the two walls, and a flat support surface provided on the bridge; a brake pad located between the two walls; a pin that protrudes from at least one of the two walls and supports the brake pad so that the brake pad is movable in the first direction; Equipped with The brake pad has a flat abutment portion facing the support surface, is located between the pin and the bridge, and is restricted from moving in a second direction perpendicular to the first direction by being supported by the pin, and is restricted from moving in a third direction opposite to the second direction by being supported by the bridge with the abutment portion in surface contact with the support surface. Caliper.

2. a biasing member having a hole, supported on the support surface, and biasing the brake pad in the second direction; Further comprising: the bridge has a protrusion extending from the support surface and fitting into the hole to limit movement of the biasing member in the first direction; The caliper of claim 1.

3. 3. The caliper of claim 1, wherein the pin projects from one of the two walls and is spaced from the other of the two walls.

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