JP6165218B2 - Disc brake - Google Patents

Description

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

  Conventionally, a disc brake is attached to a non-rotating portion of a vehicle, and is attached to a mounting member having a pair of arms spaced apart in the circumferential direction of the disc and straddling the disc in the axial direction, and slides on each arm of the mounting member. It is slidably mounted using a pin or the like, and includes a caliper that presses the inner side friction pad and the outer side friction pad against both sides of the disk, and the slide pin attached to the caliper is provided for each of the mounting members. It is configured to be slidably fitted into a pin insertion hole provided in the arm (see Patent Document 1).

JP 2006-207722 A

  However, in the disc brake of Patent Document 1, when the mounting member receives a braking torque from the pair of friction pads, the slide pin is attached to each leg portion, particularly when the outer leg portion of the mounting member is elastically deformed. There is a concern that interference with the inner wall surface of the pin insertion hole, that is, the slide pin will be squeezed in the pin insertion hole, the sliding resistance of that portion during braking increases and brake judder occurs.

  An object of this invention is to provide the disc brake which can ensure the slidability of the caliper with respect to the mounting member.

As means for solving the above-described problems, the present invention provides a mounting member that is attached to a non-rotating portion of a vehicle across a disk and that has a pair of pin insertion portions extending in the axial direction of the disk, A caliper supported by the mounting member by a slide pin fitted in the pair of pin insertion portions and displaced in the axial direction of the disk; and a disk shaft positioned on both sides of the disk with respect to the mounting member. And at least a pair of friction pads that are movably mounted in a direction and pressed against both sides of the disk by the caliper, and a piston that presses the friction pad is slidably accommodated in the caliper, and the piston the has a bottomed cylindrical cylinder piston propulsion mechanism for mechanically promotion is housed, the electric motor, the propulsion to the piston propulsion mechanism And a driving portion fixed to the bottom side of the cylinder portion to provide the braking force, and the mounting member is a braking torque of an inner friction pad that is a non-rotating portion side of the vehicle among the pair of friction pads. A disc brake having an inner side torque receiving portion that receives the braking torque of an outer side friction pad that is opposite to the inner side with respect to the disc. The slide pin fitted to the pair of pin insertion portions has a tip portion positioned closer to the inner side torque receiving portion than the outer side torque receiving portion in the axial direction of the disk, inner end surface than the inner side torque receiving portion formed on the inner side, the pair of pin insertion portion has an end face in the axial direction of both ends of the disc, inner side end face of the end face , And it is characterized in that it is formed at a position away from the disk from the end closer to the disk in the axial direction of the disk of the electric motor.
The present invention also includes an attachment member having a pair of pin insertion portions that are attached to a non-rotating portion of the vehicle across the disc and extend in the axial direction of the disc, and the pair of pin insertion portions of the attachment member. A caliper that is supported by the mounting member by a fitted slide pin and is displaced in the axial direction of the disk, and is mounted on the both surfaces of the disk so as to be movable in the axial direction of the disk. At least a pair of friction pads pressed against both sides of the disk by a caliper, and the caliper has a bottomed cylindrical cylinder portion in which a piston that presses the friction pad is projectably accommodated; and the cylinder portion An electric parking mechanism for mechanically propelling the piston, and the mounting member is a member of the pair of friction pads. An inner side torque receiving portion that receives the braking torque of the inner friction pad that is the non-rotating part side, and a braking torque of the outer side friction pad that is opposite to the inner side with respect to the disk. A slide pin fitted to the pair of pin insertion portions, and a tip portion of the slide pin fitted to the pair of pin insertion portions is closer to the inner side torque receiving portion than the outer side torque receiving portion in the axial direction of the disk. The inner end of the pin insertion portion is formed to extend to the inner side than the inner torque receiving portion , and the electric parking mechanism is provided on the bottom side of the cylinder portion and is provided inside. A housing including a speed reduction mechanism and an electric motor fixed to the housing and extending toward the disk, and an inner side end surface of the pin insertion portion in the axial direction of the disk And it is characterized in that it extends to a position overlapping with the electric motor.

  According to the disc brake of the present invention, the slidability of the caliper with respect to the mounting member can be ensured.

It is the external view which looked at the disk brake which concerns on 1st Embodiment from the side used as the vehicle outer side. It is a top view of the disc brake concerning a 1st embodiment. It is the fragmentary sectional view which looked at the disc brake concerning a 1st embodiment from one side of a disc rotor rotation direction. FIG. 3 is a sectional view taken along line XX shown in FIG. 2. It is a perspective view of the attachment member employ | adopted as the disc brake which concerns on 1st Embodiment. It is a top view of the disc brake with an electric parking mechanism concerning a 2nd embodiment. It is the external view which looked at the disk brake with an electric parking mechanism which concerns on 2nd Embodiment from one side of a disk rotor rotation direction. It is the external view which looked at the disk brake with an electric parking mechanism which concerns on 2nd Embodiment from the side used as vehicle inside.

  Hereinafter, the first embodiment will be described with reference to FIGS. In the following description, the wheel side with respect to the disc rotor 2 will be referred to as the outer side, and the left and right central portion of the vehicle opposite to the wheels with respect to the disc rotor 2 will be referred to as the inner side. . Further, the axial direction of the rotation axis of the disk rotor 2 is referred to as a disk axis direction, the radial direction of the disk rotor 2 is referred to as a disk radial direction, and the rotation direction of the disk rotor 2 is referred to as a disk rotation direction.

  As shown in FIGS. 1 to 4, the disc brake 1 according to the first embodiment includes a pair of inner friction pads 3 disposed on both sides of a disc rotor 2 attached to a rotating portion of a vehicle. The outer side friction pad 4, the caliper 5 which presses these friction pads 3 and 4 to the disk rotor 2, and the attachment member 10 fixed to non-rotating parts, such as a knuckle of a vehicle, are provided. The mounting member 10 supports a pair of inner friction pads 3 and outer friction pads 4 and a caliper 5 so as to be movable in the disk axial direction. That is, the disc brake 1 is configured as a caliper floating type.

  The caliper 5 is integrally formed with a bridge portion 11, a cylinder portion 12, a claw portion 13, and a pair of arm portions 14 and 14. The bridge portion 11 is formed to extend in the axial direction of the disk rotor 2 across the outer periphery of the disk rotor 2. The cylinder portion 12 is integrally formed on one end side of the bridge portion 11 and is disposed so as to face the surface of the inner friction pad 3 opposite to the disk rotor 2. A cylinder bore (not shown) into which a piston (not shown) is slidably fitted is formed in the cylinder portion 12. A hydraulic chamber (not shown) to which hydraulic pressure is supplied from a master cylinder (not shown) is provided in the cylinder bore. When the hydraulic pressure is supplied to the hydraulic pressure chamber, the piston is propelled in the cylinder bore toward the inner friction pad 3 to press the inner friction pad 3 against the disc rotor 2.

  The claw portion 13 is integrally formed on the other end side of the bridge portion 11 and is disposed so as to face the surface of the outer side friction pad 4 opposite to the disk rotor 2. The claw portion 13 is formed in a bifurcated shape having a recess at the center in the rotational direction of the disk rotor 2. The claw portion 13 does not need to be formed in a bifurcated shape as long as the inside of the cylinder portion 12 can be cut, and may be formed as a claw portion of one block without providing the recess.

  The pair of arm portions 14 and 14 are provided integrally with the cylinder portion 12 so as to extend to both sides in the rotation direction of the disk rotor 2 of the cylinder portion 12. Slide pins 15 and 15 are respectively attached to the distal ends of these arm portions 14 and 14 so as to extend in the axial direction of the disk rotor 2. For this attachment, one end portion of the slide pins 15 and 15 is inserted into a pin attachment hole formed on the distal end side of each arm portion 14 and 14, and the slide pins 15 and 15 are inserted into the arm portions 14 and 14 by bolts 38 and 38. 15 is fixed. Further, the slide pin 15 is formed with a groove 15a extending at a predetermined depth from the other end portion outside the vehicle, and serves as a grease storage portion for the slide pin 15 to slide. Further, a rubber pin boot 40 having a telescopic bellows portion that covers the slide pin 15 is provided between one end portion of the slide pin 15 and the mounting member 10.

  Next, the attachment member 10 will be described with reference to FIGS. The mounting member 10 includes an inner portion 25 disposed on the inner side with respect to the disk rotor 2, an outer portion 20 disposed on the outer side with respect to the disk rotor 2, and a disk shaft so as to straddle the outer periphery of the disk rotor 2. A connecting portion 30 that extends in the direction and integrally connects the outer portion 20 and the inner portion 25, and is provided so as to protrude outward in the disk radial direction from the outer surface of the connecting portion 30, and in the same direction as the connecting portion 30 It is comprised from the pin insertion part 31 extended in this.

  The inner portion 25 includes a pair of inner side torque receiving portions 26 and 26 that are provided apart from each other in the disk rotation direction, and an inner beam portion 27 that connects the inner side torque receiving portions 26 and 26. Each of the inner side torque receiving portions 26 and 26 comes into contact with both ends of the inner side friction pad 3 in the disk rotation direction, and supports the inner side friction pad 3 so as to be movable in the disk axial direction. Each of the inner side torque receiving portions 26 and 26 is adapted to receive a braking torque transmitted from the inner side friction pad 3 during vehicle braking when the vehicle is moving forward or backward. Fitting grooves 29 and 29 are provided on the opposing surfaces of the inner side torque receiving portions 26 and 26, respectively. In the fitting grooves 29, 29, guide convex portions 28, 28 formed at both ends of the inner friction pad 3 in the disk rotation direction are slidable via pad springs 35, 35 attached to the attachment member 10. It is designed to fit. The inner beam portion 27 is formed with attachment holes 36 for attaching the attachment member 10 to a non-rotating portion such as a knuckle portion of the vehicle.

  The outer portion 20 includes a pair of outer side torque receiving portions 21 and 21 that are provided apart from each other in the disk rotation direction, and an outer beam portion 22 that connects the outer side torque receiving portions 21 and 21. Each of the outer side torque receiving portions 21 and 21 is in contact with both ends of the outer friction pad 4 in the disk rotation direction, and supports the outer friction pad 4 so as to be movable in the disk axial direction. Each of the outer side torque receiving portions 21 and 21 is adapted to receive the braking torque transmitted from the outer friction pad 4 during vehicle braking when the vehicle is moving forward or backward. Further, fitting groove portions 24 and 24 are provided on the opposing surfaces of the outer side torque receiving portions 21 and 21, respectively. The fitting groove portions 24, 24 are slidably fitted to the guide convex portions 23, 23 provided at both ends of the outer friction pad 4 in the disk rotation direction via pad springs 35, 35 attached to the attachment member 10. It is supposed to be. The outer beam portion 22 is formed so as to connect one end of the outer side torque receiving portions 21, 21 on the inner side in the disk radial direction, and one of the outer side torque receiving portions 21, 21. The side torque receiving portion 21 is provided to suppress deformation as much as possible when receiving braking torque during vehicle braking.

  The connecting portions 30, 30 are the other end portion on the outer side in the disk radial direction of each outer side torque receiving portion 21, 21 and the other end portion on the outer side in the disk radial direction of the inner side torque receiving portions 26, 26. Are linked. Inner side surfaces 31 a between the outer side torque receiving portions 21, 21 and the inner side torque receiving portions 26, 26 in the connecting portions 30, 30 are opposed to the outer peripheral surface of the disk rotor 2.

  Here, the boundary between the connecting portion 30 and the inner side torque receiving portion 26 and the boundary between the connecting portion 30 and the outer side torque receiving portion 21 are indicated by two-dot chain lines in FIGS. 1, 3, and 5. The inner surface 31a is projected.

  The pin insertion portion 31 is integrally connected so as to protrude outward in the radial direction of the disk rotor 2 from the outer peripheral surface of the coupling portion 30 and extends in the same disk axial direction as the direction in which the coupling portion 30 extends. Has been. The pin insertion part 31 has a bottomed hole in which a pin insertion hole 31a into which the slide pin 15 fixed to the attachment part 14 of the caliper 5 is slidably inserted has a predetermined depth from the inner side. Is formed. The bottom portion 31c of the pin insertion hole 31a is formed so as to be positioned closer to the inner side torque receiving portion 26 than the outer side torque receiving portion 21 of the outer portion 20. That is, the bottom 31c is located on the inner side of the outer side torque receiving portion 21 opposite to the disk rotor 2 in other words, the inner side surface (the position indicated by the dotted line in FIG. 2) of the outer side torque receiving portion 21. Is formed. The outer side end surface 31b of the pin insertion portion 31 is formed on the inner side of the outer side surface 21b of the outer side torque receiving portion 21 with respect to the disk axial direction. Moreover, the inner side edge part of the pin insertion part 31 is arrange | positioned in the position which protruded from the inner part 25 to the inner side.

  Here, the boundary between the connecting portion 30 and the pin insertion portion 31 is a position as indicated by a one-dot chain line in FIG. 4, and the pin insertion portion 31 begins to protrude from the end portion of the connecting portion 30 in the disk rotation direction. The part which extended the surface to the position substantially becomes a boundary, ie, an outer surface.

  The slide pins 15 and 15 fixed to the arm portions 14 and 14 of the caliper 5 are slidably inserted into the pin insertion holes 31a of the pin insertion portion 31 as described above. By this insertion, the caliper 5 faces the surface of the outer friction pad 4 facing the outer side of the outer friction pad 4 so that the bridge portion 11 straddles the outer periphery of the disc rotor 2 and the cylinder portion 12 is subjected to inner friction. It arrange | positions so that the surface which faces the vehicle inner side of the pad 3 may be opposed. As a result, the caliper 5 is supported by the mounting member 10 so as to be relatively movable along the axial direction of the disk rotor 2.

Next, the action at the time of braking of the disc brake 1 according to the present embodiment will be described.
When the brake pedal (not shown) is depressed by the driver, the hydraulic pressure corresponding to the depressing force of the brake pedal is supplied from the master cylinder to the hydraulic pressure chamber in the caliper 5. As a result, the piston provided in the cylinder portion 12 of the caliper 5 advances from the original position during non-braking while pressing the piston seal (not shown) and presses the inner friction pad 3 against the disc rotor 2. The caliper 5 moves to the inner side with respect to the mounting member 10 by the reaction force of the pressing force of the piston. As a result, the claw portion 13 of the caliper 5 presses the outer friction pad 4 against the disc rotor 2. As a result, the disc rotor 2 is sandwiched between the pair of inner and outer friction pads 3 and 4 and braking force is generated in the vehicle.

  During this braking, braking torque from the pair of inner and outer friction pads 3, 4 is transmitted to the inner side torque receiving portion 26 and the outer side torque receiving portion 21 of the mounting member 10 that is the delivery side of the disk rotor 2. Become so. In particular, since the outer side torque receiving portion 21 of the mounting member 10 is separated from the mounting hole 36 of the inner beam portion 27 serving as a fixed portion to the vehicle, the amount of deformation due to transmission of braking torque more than the inner side torque receiving portion 26. Is getting bigger. As a result, the outer side torque receiver 21 is deformed so as to move from the inner side torque receiver 26 to the outlet side.

  On the other hand, in the above embodiment, the bottom portion of the pin insertion hole 31a of the pin insertion portion 31 is located on the inner side of the inner side surface of the outer side torque receiving portion 21 of the outer portion 20. Thereby, the influence of the deformation | transformation of the outer side torque receiving part 21 becomes difficult to act on the pin insertion part 31 of the attachment member 10. FIG. As a result, the elastic deformation of the pin insertion portion 31 can be suppressed, and as a result, the slidability of the slide pin 15 during braking, that is, the slidability of the caliper 5 can be ensured.

  In particular, in the above-described embodiment, the inner side end of the pin insertion portion 31 extends from the inner side torque receiving portion 26 to the inner side, so that most of the slide pin 15 is a deformation of the inner side torque receiving portion 26. Since the portion affected by the deformation of the outer side torque receiving portion 21 is limited to the tip portion of the slide pin 15, the influence of the deformation of the outer side torque receiving portion 21 is further reduced.

  Further, in the disc brake, when the hydraulic pressure in the hydraulic chamber in the caliper 5 increases during braking, the claw portion 13 and the cylinder portion 12 tend to be deformed so as to open around the cylinder portion 12 side of the bridge portion 11. It is in. Due to this deformation, the slide pin 15 is inclined with respect to the pin insertion hole 31a of the mounting member 10, and the slidability of the caliper 5 with respect to the mounting member 10 is hindered, which may cause brake judder. is there.

  On the other hand, in the present embodiment, the pin insertion portion 31 of the mounting member 10 is integrally connected so as to extend radially outward of the disk rotor 2 from the outer surface of the coupling portion 30. Yes. That is, the arm portion 14 of the caliper 5 to which the slide pin 15 is fixed intersects with an extension line of a line connecting the center of the disc rotor 2 and the center of the cylinder portion 12 from the outer side of the cylinder portion 12 in the radial direction of the disc. 2 extending in the tangential direction. For this reason, the mounting position of the slide pin 15 is close to the center of deformation, and the influence of the deformation of the caliper 5 during braking is reduced. Therefore, the slidability of the caliper 5 with respect to the mounting member 10 can be ensured, and the occurrence of brake judder can be suppressed.

  On the other hand, when the driver releases the brake pedal, the supply of hydraulic pressure from the master cylinder is interrupted, and the hydraulic pressure in the hydraulic chamber in the caliper 5 decreases. Thereby, the piston in the cylinder part 12 is retracted to the original position as the elastic deformation of the piston seal is eliminated. In this way, the braking force of the vehicle is released.

  As described above, in the disc brake 1 according to the present embodiment, the pin insertion portion 31 of the mounting member 10 is formed so as to protrude outward in the radial direction of the disc rotor 2 from the outer peripheral surface of the connecting portion 30. The bottom portion 31c of the pin insertion hole 31a of the pin insertion portion 31 is formed closer to the inner side torque receiving portion 26 than the outer side torque receiving portion 21 of the outer portion 20, so that the outer side torque The influence of the deformation of the receiving portion 21 is less likely to act on the pin insertion portion 31 of the mounting member 10. As a result, the elastic deformation of the pin insertion portion 31 can be suppressed, and as a result, the slidability of the slide pin 15 during braking, that is, the slidability of the caliper 5 can be ensured. Jada can be suppressed.

  Next, a second embodiment will be described with reference to FIGS. In the disc brake 101 of the second embodiment, a caliper 105 with an electric parking mechanism is slidably provided on the mounting member 10 described above.

An electric parking mechanism 50 is attached to the bottom side of the cylinder portion 12 of the caliper 105. Electric parking mechanism 50, the electric motor 5 2 is fixed, and a speed reduction mechanism housing 51 (not shown) is included for energizing the rotation of the electric motor 5 2.

  Thus, when the caliper 105 with the electric parking mechanism is slidably provided on the mounting member 10, as shown in FIG. 8, the electric parking mechanism 50 is provided in the inner beam portion 27 of the mounting member 10. The disc brake 101 having the caliper 105 with the electric parking mechanism can be mounted on the vehicle and can be disposed between the mounting hole 36 and each pin insertion portion 31 (each slide pin 15). it can. Further, in the caliper 105 with the electric parking mechanism, since the electric parking mechanism 50 is a heavy object, the center of gravity moves backward toward the inner side. Thus, even when the caliper whose center of gravity moves to the inner side is provided in the mounting member 10, the fitting length range of the slide pin 15 with the pin insertion hole 31 a is offset to the inner side with respect to the disk rotor 3. Since it is within the range, the slidability of the caliper can be ensured.

  In the present embodiment, an example of a disc brake having a caliper 105 with an electric parking mechanism has been shown. However, the present invention is not limited thereto, and the above-described mounting member 10 is applied to a disc brake having a caliper with a mechanical parking mechanism. You may make it do.

  The disc brakes of the first and second embodiments described above are attached to a non-rotating portion of the vehicle across the disc and have an attachment member having a pin insertion portion extending in the axial direction of the disc, and a pin insertion of the attachment member. A caliper supported by the mounting member by a slide pin fitted in the fitting portion and slidably displaced in the axial direction of the disc, and located on both sides of the disc and moved in the axial direction of the disc relative to the mounting member And at least a pair of friction pads that are detachably mounted and pressed against both sides of the disk by the caliper, and the mounting member is an inner friction pad that is the non-rotating part side of the vehicle among the pair of friction pads. An inner side torque receiving portion that receives the braking torque of the outer side, and an outer side friction pad that is opposite to the inner side with respect to the disk. A disc brake having an outer side torque receiving portion and a connecting portion connecting the outer side torque receiving portion and the inner torque receiving portion, wherein the pin insertion portion is formed from an outer surface of the connecting portion. The bottom of a pin insertion hole, which is provided so as to protrude outward in the radial direction of the disk and is formed as a bottomed hole inside, is positioned closer to the inner side torque receiving part than the outer side torque receiving part. It has become. With such a configuration, most of the slide pin is deformed by the inner side torque receiving portion, and the portion affected by the deformation of the outer side torque receiving portion is limited to the tip end portion of the slide pin. The influence of the deformation of the side torque receiving portion is reduced. For this reason, the sliding property of the slide pin during braking, that is, the sliding property of the caliper can be ensured. Therefore, occurrence of brake judder can be suppressed.

In the disc brakes of the first and second embodiments, the pin insertion portion has end faces at both ends in the axial direction of the disc, and the outer side end face of the end faces is the connection portion of the connecting portion. It is formed so as to be positioned closer to the inner side of the disc in the axial direction than the end surface on the outer side of the disc in the axial direction. With such a configuration, most of the slide pin is deformed by the inner side torque receiving portion, and the portion affected by the deformation of the outer side torque receiving portion is limited to the tip end portion of the slide pin. The influence of the deformation of the side torque receiving portion is reduced. For this reason, the sliding property of the slide pin during braking, that is, the sliding property of the caliper can be ensured. Therefore, occurrence of brake judder can be suppressed.

In the disc brakes of the first and second embodiments, the pin insertion portion is a position where the inner side end surface of the end surface is farther from the disc than the axial inner side end surface of the disc of the connecting portion. Is formed. With such a configuration, most of the slide pin is deformed by the inner side torque receiving portion, and the portion affected by the deformation of the outer side torque receiving portion is limited to the tip end portion of the slide pin. The influence of the deformation of the side torque receiving portion is reduced. For this reason, the sliding property of the slide pin during braking, that is, the sliding property of the caliper can be ensured. Therefore, occurrence of brake judder can be suppressed.

  In the disc brakes of the first and second embodiments, the caliper includes a cylinder portion in which a piston that presses the friction pad is movably accommodated, and a pair of the slide pin fixed to the cylinder portion that extends from the cylinder portion. Tangential direction of the disk intersecting with an extension line of a line connecting the center of the disk and the center of the cylinder part from the radially outer side of the disk in the cylinder part It is formed to extend. With such a configuration, the mounting position of the slide pin with respect to the pin insertion portion is close to the center of the caliper deformation during braking, and the influence of the deformation of the caliper 5 during braking is reduced. Therefore, it becomes possible to ensure the slidability of the caliper with respect to the mounting member, and the occurrence of brake judder can be suppressed.

  In the disc brakes of the first and second embodiments, the arm portion extends from an end portion in the axial direction of the disc opposite to the side from which the piston projects in the cylinder portion. With such a configuration, the sliding length of the slide pin with respect to the pin insertion portion can be ensured, and the slidability of the caliper with respect to the mounting member can be ensured.

  In the disc brake according to the second embodiment, the caliper accommodates a piston that presses the friction pad so that the piston can advance and retreat, and a piston propulsion mechanism that mechanically propels the piston. And a drive unit fixed to the bottom side of the cylinder unit to provide a propulsive force to the piston propulsion mechanism, and the drive unit rotates the disk from the center of the cylinder unit. It is provided extending along the direction. When the caliper having such a driving portion is provided on the mounting member, the caliper can be slid even if the driving portion has the center of gravity of the caliper on the bottom side of the cylinder portion.

  In the disc brake of the second embodiment, the pin insertion portion is disposed radially outward of the disc from the tip position of the drive portion. With such a configuration, when the slide pin provided at the position corresponding to the pin insertion portion is removed or attached, the operation is not hindered by the drive portion, and the maintenance performance of the disc brake is improved.

  In the disc brake of the second embodiment, a fixing portion that is fixed to a non-rotating portion of the vehicle is formed on the mounting member, and the fixing portion is in a radial direction of the disc with respect to the tip position of the driving portion. It is arranged inward. With such a configuration, when the mounting member is fixed to the non-rotating portion of the vehicle, the fixing operation is not hindered by the drive unit, and the mounting efficiency of the disc brake to the vehicle is improved.

  DESCRIPTION OF SYMBOLS 1,101 Disc brake, 2 Disc rotor, 3 Inner friction pad, 4 Outer friction pad, 5, 105 Caliper, 10 Mounting member, 15 Slide pin, 20 Outer part, 21 Outer side torque receiving part, 22 Outer beam part, 25 Inner Part, 26 inner side torque receiving part, 27 inner beam part, 30 connecting part, 31 pin insertion part, 31a pin insertion hole

Claims (5)

An attachment member attached to a non-rotating part of the vehicle across the disc and having a pair of pin insertion portions extending in the axial direction of the disc;
A caliper that is supported by the mounting member by a slide pin fitted to the pair of pin insertion portions of the mounting member and is displaced in the axial direction of the disk;
At least a pair of friction pads positioned on both sides of the disc and attached to the attachment member so as to be movable in the axial direction of the disc and pressed against both sides of the disc by the caliper;
The caliper has a bottomed cylindrical cylinder portion in which a piston that presses the friction pad is slidably accommodated, a piston propulsion mechanism that mechanically propels the piston is accommodated, and an electric motor. the piston propulsion mechanism and the drive unit which is secured to the bottom side of the cylinder portion to impart a propulsion force is provided,
The mounting member is
An inner side torque receiving portion that receives a braking torque of an inner side friction pad that is a non-rotating portion side of the vehicle among the pair of friction pads;
A disc brake having an outer side torque receiving portion that receives a braking torque of an outer side friction pad that is opposite to the inner side with respect to the disc;
The slide pin fitted to the pair of pin insertion portions has a tip portion positioned closer to the inner side torque receiving portion than the outer side torque receiving portion in the axial direction of the disk.
The inner side end face of the pin insertion part is formed on the inner side of the inner side torque receiving part ,
The pair of pin insertion portions have end faces at both ends in the axial direction of the disk, and an inner end face of the end faces is closer to an end closer to the disk in the axial direction of the disk of the electric motor. The disc brake is also characterized by being formed at a position away from the disc. The disk brake according to claim 1 , wherein the drive unit is provided to extend from a center of the cylinder unit along a rotation direction of the disk. The disc brake according to claim 2 , wherein the pair of pin insertion portions are disposed radially outward of the disc from a tip position of the driving portion. The mounting member is formed with a fixing portion that is fixed to a non-rotating portion of the vehicle, and the fixing portion is disposed radially inward of the disk with respect to a tip position of the driving portion. The disc brake according to claim 2 or 3 . An attachment member attached to a non-rotating part of the vehicle across the disc and having a pair of pin insertion portions extending in the axial direction of the disc;
A caliper that is supported by the mounting member by a slide pin fitted to the pair of pin insertion portions of the mounting member and is displaced in the axial direction of the disk;
At least a pair of friction pads positioned on both sides of the disc and attached to the attachment member so as to be movable in the axial direction of the disc and pressed against both sides of the disc by the caliper;
The caliper includes a bottomed cylindrical cylinder portion in which a piston that presses the friction pad is slidably accommodated, and an electric parking mechanism that is provided on the bottom side of the cylinder portion and mechanically propels the piston. Consists of
The mounting member is
An inner side torque receiving portion that receives a braking torque of an inner side friction pad that is a non-rotating portion side of the vehicle among the pair of friction pads;
An outer side torque receiving portion that receives a braking torque of an outer side friction pad that is opposite to the inner side with respect to the disk;
The slide pin fitted to the pair of pin insertion portions has a tip portion positioned closer to the inner side torque receiving portion than the outer side torque receiving portion in the axial direction of the disk.
An inner side end portion of the pin insertion portion is formed to extend to the inner side from the inner side torque receiving portion ,
The electric parking mechanism includes a housing provided on the bottom side of the cylinder portion and including a speed reduction mechanism therein, and an electric motor fixed to the housing and extending toward the disk.
An inner end surface of the pin insertion portion extends to a position overlapping with the electric motor in the axial direction of the disc.

Images