WO2021215157A1

WO2021215157A1 - Disc brake

Info

Publication number: WO2021215157A1
Application number: PCT/JP2021/011358
Authority: WO
Inventors: 厚志小平
Original assignee: 日立Astemo株式会社
Priority date: 2020-04-24
Filing date: 2021-03-19
Publication date: 2021-10-28
Also published as: JP2023089312A

Abstract

This disc brake comprises: a carrier having a fixed part fixed to a non-rotating part of a vehicle; a caliper that is attached to the carrier and has a cylinder part that accommodates a piston applying pressure to an inner brake pad; and a drive mechanism that has an electric motor and a reduction mechanism and transmits the driving force of the electric motor to the piston via the reduction mechanism, wherein the fastening direction of the fixed part with the non-rotating part of a vehicle is parallel to the direction orthogonal to the axial direction of the piston. As a result, although the electric motor, reduction mechanism, etc. are provided, the carrier can be miniaturized, and by obtaining high rigidity, the responsiveness at the time of braking, etc. can be improved.

Description

Disc brake

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

As a conventional floating disc brake, Patent Document 1 describes a plurality of disc brakes that are fixed to a non-rotating portion of a vehicle via a plurality of mounting portions provided apart from each other in the circumferential direction of the disc rotor. Of the mounting portions, one mounting portion is fixed by a fastening means extending in a direction perpendicular to the rotation axis direction of the disc rotor, and the other mounting portion is fixed by a fastening means extending in a direction parallel to the rotation axis direction of the disc rotor. Disc brakes to be used are disclosed.

Japanese Unexamined Patent Publication No. 2003-227529

Therefore, in order to obtain good responsiveness during braking, electric disc brakes require an increase in the output of the electric motor and high rigidity in the carrier that supports the caliper, and electric disc brakes require electric motors and gears. The unit and the like are large, and in order to cope with this, in the above-mentioned disc brake fixing structure according to Patent Document 1, restrictions on the carrier fixing portion and the slide pin portion (securing the operation space of the mounting tool, supporting at the center of gravity position). In order to secure such a condition, the carrier becomes large and its rigidity decreases, and as a result, the responsiveness at the time of braking or the like deteriorates.

An object of the present invention is to provide a disc brake that improves the responsiveness at the time of braking by realizing the miniaturization of the carrier and obtaining high rigidity.

In the disc brake according to the embodiment of the present invention, the disc brake has a carrier having a fixed portion fixed to a non-rotating portion of the vehicle and a cylinder portion accommodating a piston for pressing a braking member. A caliper attached to the carrier, a slide pin fixed to either the carrier or the caliper and allowing the caliper to slide in the axial direction of the wheel with respect to the carrier, an electric motor, and a speed reduction mechanism. A drive mechanism for transmitting a driving force to the piston via the reduction mechanism is provided, and the fixed portion is parallel to a direction in which the fastening direction with the non-rotating portion of the vehicle is orthogonal to the axial direction of the piston. It is characterized by being.

According to the disc brake according to the embodiment of the present invention, even if an electric motor, a reduction mechanism, or the like is provided, the carrier can be miniaturized, and by obtaining high rigidity, the responsiveness at the time of braking or the like is improved. can do.

The plan view of the disc brake which concerns on 1st Embodiment. The front view from the inner side in the disc brake which concerns on 1st Embodiment. The perspective view of the disc brake which concerns on 1st Embodiment. The cross-sectional view which shows the support structure by the slide pin adopted for the disc brake which concerns on 1st Embodiment. The plan view of the disc brake which concerns on 2nd Embodiment. The perspective view of the disc brake which concerns on 2nd Embodiment.

Hereinafter, the present embodiment will be described in detail with reference to FIGS. 1 to 6.
The

disc brakes

100 and 200 according to the first and second embodiments are electric brake devices that generate braking force by driving an electric motor 32, which is an electric motor, during normal traveling. The

disc brakes

100 and 200 according to the first and second embodiments are four-wheeled vehicles, and are provided on both the left and right wheels thereof. In addition, in FIGS. 1 and 2, the left-right direction thereof is the rotation direction of the disc rotor D. In FIG. 1, the vertical direction thereof is the axial direction of the disc rotor D, and in FIG. 2, the paper surface direction is the axial direction of the disc rotor D. Further, in the following description, the inside of the vehicle is referred to as an inner side, and the outside of the vehicle is referred to as an outer side.

First, the disc brake 100 according to the first embodiment will be described in detail with reference to FIGS. 1 to 4. As shown in FIGS. 1 to 3, the disc brake 100 according to the first embodiment is a pair of braking members arranged on both sides in the axial direction with the disc rotor D attached to the rotating portion of the vehicle interposed therebetween. An inner brake pad 2 (see FIG. 1), an outer brake pad 3 (see FIG. 1), and a caliper 4 are provided. The disc brake 100 according to the first embodiment is configured as a caliper floating type. The pair of inner brake pads 2, the outer brake pads 3, and the caliper 4 are attached to a carrier 5 fixed to a non-rotating portion such as a knuckle of a vehicle in the axial direction of the disc rotor D (wheel) with respect to the carrier 5. It is supported so that it can be moved.

As shown in FIGS. 1 to 3, the carrier 5 is integrally connected to a pair of

pin connecting portions

12 and 12 to which

slide pins

10 and 10 described later are connected, and a pair of

pin connecting portions

12 and 12, respectively. , Inner side and outer side support

portions

14 and 15 that independently support the inner and

outer brake pads

2 and 3, respectively. The pair of

pin connecting portions

12, 12 are arranged at intervals along the rotation direction of the disc rotor D. Each pin connecting portion 12 is integrally connected to the inner side arm portion 20 (described later) of the inner side support portion 14 and the outer side arm portion 28 (described later) of the outer side support portion 15, and each pin sliding described later is performed. It is projected on the part 40 side. Each pin connecting portion 12 is projected from a position between the inner side arm portion 20 of the inner side support portion 14 and the outer side arm portion 28 of the outer side support portion 15. Through holes 17 (see FIG. 4) are formed in each pin connecting portion 12 along the axial direction of the disc rotor D.

The inner side support portions 14 are arranged at intervals along the rotation direction of the disc rotor D, and include a pair of inner

side arm portions

20 and 20 extending in a direction orthogonal to the axial direction of the slide pin 10 described later. It is composed of an inner beam portion 21 that connects the ends of the pair of

inner arm portions

20 and 20 opposite to the pin connecting portion 12. The inner brake pad 2 is movably supported inside a pair of

inner arm portions

20, 20 along the axial direction of the disc rotor

D. Fixing portions

24, 24 for fixing the carrier 5 to the non-rotating portion of the vehicle are integrally connected to both ends of the disc rotor D of the inner beam portion 21 in the rotational direction. Each fixing portion 24 is formed in a block shape having a predetermined thickness. In the plan view shown in FIG. 1, each of the

fixing portions

24, 24 protrudes outward in the rotation direction of the disc rotor D from the pair of

pin sliding portions

40, 40 provided in the cylinder portion 37, which will be described later. Is placed in.

The pair of

fixing portions

24, 24 have the same plan view shape and position in the plan view shown in FIG. In the plan view shown in FIG. 1, the

fixing portions

24, 24 are aligned along the outside of the

pin sliding portions

40, 40 from both ends in the rotation direction of the disc rotor D of the inner beam portion 21 without any gap. The tip thereof extends so as to be located within the sliding range W of the pair of

slide pins

10 and 10 described later with respect to the sliding

holes

45 and 45 of the pair of

pin sliding portions

40 and 40 of the caliper 4. In the plan view shown in FIG. 1, the fixing portion 24 has substantially the same width and length at a portion overlapping the pin sliding portion 40 in the rotation direction of the disc rotor D. The tip of the fixed portion 24 is formed in a semicircular shape in the plan view shown in FIG. With reference to FIG. 2, the

fixing portions

24, 24 are positioned so that both end surfaces along the direction in which the inner side arm portion 20 extends (the lateral direction of the inner and outer brake pads 2 and 3) are respectively located on the same plane. Placed in. The end face of each fixing portion 24 in the direction in which the inner side arm portion 20 extends and is separated from the pin sliding portion 40 is arranged at substantially the same position as the peripheral edge portion of the cover 56 described later.

A fixing hole 25 through which a fixing bolt (not shown) for fixing the carrier 5 to the non-rotating portion of the vehicle is inserted is formed at the tip of each fixing portion 24. The axial direction (fastening direction) of the fixing hole 25 is a direction orthogonal to the axial direction of the piston 43, the slide pin 10 and the disc rotor D, which will be described later, and the direction in which the inner side arm portion 20 extends, in other words, the inner and outer brakes. It extends parallel to the lateral direction of the

pads

2 and 3. As can be seen from FIG. 1, the

fixing holes

25, 25 of the

fixing portions

24, 24 are at the same position along the axial direction of the disc rotor D. The

entire fixing holes

25, 25 of the

fixing portions

24, 24 are the sliding ranges of the pair of

slide pins

10 and 10 described later with respect to the sliding

holes

45, 45 of the pair of

pin sliding portions

40, 40 of the caliper 4. It is located in W. In other words, the tip portion of each of the

fixing portions

24, 24 including the

fixing holes

25, 25 is located within the sliding range W of the pair of

slide pins

10, 10. Then, the carrier 5 is fixed to the non-rotating portion of the vehicle through the

fixing holes

25, 25 provided in the pair of

fixing portions

24, 24. In short, the carrier 5 is fixed to the non-rotating portion of the vehicle in the so-called radial direction by the

fixing holes

25, 25 of the pair of

fixing portions

24, 24. In other words, the carrier 5 is fixed to the non-rotating portion of the vehicle by a so-called radial fixing method.

The outer side support portion 15 is a pair of outer

side arm portions

28, 28 arranged on the outer side at intervals from the pair of inner

side arm portions

20, 20 of the inner side support portion 14, and the pair of outer side arms. It is composed of an outer beam portion 29 that connects the ends of the

portions

28, 28 opposite to the pin connecting portion 12. The outer brake pads 3 are movably supported inside the pair of

outer arm portions

28, 28 along the axial direction of the disc rotor D.

As shown in FIGS. 1 to 3, the caliper 4 has a caliper main body 30 which is the main body of the caliper 4, an electric motor 32, a reduction mechanism 33, and a thrust applying mechanism 34, and receives a driving force from the electric motor 32. It includes a drive mechanism 35 that transmits to a piston 43 (see FIG. 2) in a cylinder portion 37 (cylinder bore 38) of the caliper main body 30 via a speed reduction mechanism 33 and a thrust applying mechanism 34. The caliper main body 30 is arranged on the proximal end side facing the inner brake pad 2 inside the vehicle, and straddles the disc rotor D from the cylinder portion 37 and the cylindrical cylinder portion 37 that opens facing the inner brake pad 2. A pair of

claws

39, 39 that extend to the outer side and are arranged on the tip side facing the outer brake pad 3 on the outer side, and a pair that protrudes from the cylinder portion 37 to both outer sides in the rotation direction of the disc rotor D. The

pin sliding portions

40, 40 of the above are integrally formed.

The piston 43 (see FIG. 2) is supported in the cylinder bore 38 (see FIG. 2) of the cylinder portion 37 so as to be movable along the axial direction so as not to rotate relative to each other. Although not shown, the piston 43 has a cup shape including a cylindrical portion and a bottom portion, and its axial direction coincides with the axial direction of the disc rotor D and the slide pin 10. Then, at the time of braking, the driving force from the electric motor 32 of the driving mechanism 35 is transmitted to the piston 43 via the deceleration mechanism 33 and the thrust applying mechanism 34 of the driving mechanism 35, and the piston 43 is directed toward the disc rotor D. Press the inner brake pad 2 while moving forward. On the other hand, when the braking is released, the driving force from the electric motor 32 of the driving mechanism 35 is transmitted to the piston 43 via the deceleration mechanism 33 and the thrust applying mechanism 34 of the driving mechanism 35, and the piston 43 retreats from the inner brake pad 2. Will come to do.

As described above, the cylinder portion 37 of the caliper main body 30 is integrally formed with a pair of

pin sliding portions

40, 40 projecting from both outer sides in the rotation direction of the disc rotor D. A pair of slide pins 10 and 10 are slidably inserted along the axial direction inside the pair of

pin sliding portions

40, 40, respectively. Each pin sliding portion 40 extends along the axial direction of the disc rotor D. The

pin sliding portions

40, 40 are arranged on the inner side of the pair of

pin connecting portions

12, 12 of the carrier 5. With reference to FIG. 4, the

pin sliding portions

40, 40 are provided at positions facing the through

holes

17 and 17 of the pair of

pin connecting portions

12 and 12 along the axial direction of the disc rotor D. .. Each pin sliding portion 40 is formed in a bottomed cylindrical shape having a sliding hole 45 opened from an end surface on the outer side. On the other hand, the slide pin 10 extends along the axial direction of the disc rotor D. The slide pin 10 includes a hexagonal head 47 provided at the outer end, and a female screw hole 48 provided at a predetermined depth from the radial center of the outer end of the hexagon head 47.

Then, the pair of slide pins 10 and 10 are slidably inserted from the outer side into the sliding

holes

45 and 45 of the

pin sliding portions

40 and 40 provided in the cylinder portion 37, respectively, along the axial direction. The corresponding

pin connecting portions

12 and 12 of the carrier 5 are formed on the outer end faces of the hexagonal heads 47 and 47 of the slide pins 10 and 10 with the female screw holes 48 and 48 of the slide pins 10 and 10 and the pin connecting portions 12 respectively. , 12 are brought into contact with the through

holes

17 and 17 so as to be located concentrically with each other. Then, the

hexagon bolts

50 and 50 are inserted into the through

holes

17 and 17 of the

pin connecting portions

12 and 12 and screwed into the female screw holes 48 and 48 of the slide pins 10 and 10.

That is, the slide pins 10 and 10 are fixed to the

pin connecting portions

12 and 12 of the carrier 5 by the

hexagon bolts

50 and 50, respectively, and the slide pins 10 and 10 are fixed to the

pin sliding portions

40 and 40, respectively. It is slidably inserted into the sliding

holes

45 and 45 of the above along the axial direction, respectively. The pair of slide pins 10 and 10 are slidably inserted into the sliding

holes

45 and 45 of the pair of

pin sliding portions

40 and 40 of the caliper 4 within the sliding range W shown in FIG. NS. As a result, the caliper main body 30 (caliper 4) can be slidably supported with respect to the carrier 5 along the axial direction of the disc rotor D by sliding the pair of slide pins 10 and 10.

In this way, when the

hexagon bolts

50 and 50 are inserted into the through

holes

17 and 17 of the

pin connecting portions

12 and 12, respectively, and screwed into the female screw holes 48 and 48 of the slide pins 10 and 10, respectively. , The electric motor 32 and the reduction mechanism 33 are tightened from the outer side opposite to the side. That is, the

hexagon bolts

50 and 50 for fixing the pair of slide pins 10 and 10 to the pair of

pin connecting portions

12 and 12 are electric motors in the axial direction of the disc rotor D, that is, in the axial direction of the slide pins 10 and 10. It is arranged on the outer side opposite to the 32 and the reduction mechanism 33 side (inner side). As a result, the pair of slide pins 10 and 10 makes it easy to assemble the caliper main body 30 to the carrier 5 so as to be slidable along the axial direction of the disc rotor D (wheel).

In addition, referring to FIG. 4, in the range from the periphery of the sliding

holes

45, 45 at the outer end of each of the

pin sliding portions

40, 40 to the hexagonal heads 47, 47 of the slide pins 10, 10. , Pin boots 52, 52 having a bellows portion that can be expanded and contracted so as to cover each of the slide pins 10 and 10. Further, as shown in FIG. 1, the pair of fixing portions 24 of the carrier 5 are within the sliding range W of the pair of slide pins 10 and 10 with respect to the sliding

holes

45 and 45 of the pair of

pin sliding portions

40 and 40. , 24 fixing

holes

25, 25 as a whole are located. Further, the center of gravity of the caliper 4 including the carrier 5 along the axial direction of the disc rotor D is configured to be located within the sliding range W of the pair of slide pins 10 and 10. As a result, the fixing holes 25, 25 of the pair of fixing

portions

24, 24 of the carrier 5 can be brought close to the position of the center of gravity of the caliper 4 including the carrier 5 along the axial direction of the disc rotor D. In other words, the mounting position of the carrier 5 to the non-rotating portion of the vehicle by the pair of fixing

holes

25, 25 can be brought close to the position of the center of gravity of the caliper 4 including the carrier 5 along the axial direction of the disc rotor D. ..

As shown in FIGS. 1 to 3, the drive mechanism 35 converts the electric motor 32, which is an electric motor, the deceleration mechanism 33 for increasing the rotational torque from the electric motor 32, and the rotational motion from the deceleration mechanism 33 into linear motion. A thrust applying mechanism 34 that converts and applies thrust to the piston 43 is provided. The electric motor 32 is arranged so that its axis is substantially parallel to the axis of the cylinder portion 37 of the caliper main body 30. The rotation shaft (not shown) of the electric motor 32 extends along the axial direction of the disc rotor D. The electric motor 32 is housed in the motor gear housing 55.

The deceleration mechanism 33 increases the rotational torque from the electric motor 32 and transmits it to the thrust applying mechanism 34. As the speed reduction mechanism 33, a planetary gear speed reduction mechanism or the like is adopted. The reduction mechanism 33 is housed in the motor gear housing 55. The rotation of the electric motor 32 from the rotation shaft is transmitted to the speed reduction mechanism 33. With reference to FIG. 1, as described above, the electric motor 32 and the reduction mechanism 33 are housed in the motor gear housing 55, and the motor gear housing 55 extends from the cylinder portion 37 of the caliper main body 30 to the electric motor 32. Placed in range. In the motor gear housing 55, the cylinder portion 37 and the opening on the side opposite to the electric motor 32 side are closed by the cover 56. The thrust applying mechanism 34 is arranged in the cylinder bore 38 of the cylinder portion 37 of the caliper main body 30 between the bottom portion of the cylinder bore 38 and the piston 43. The thrust applying mechanism 34 converts the rotary motion from the deceleration mechanism 33 into a linear motion to apply the thrust to the piston 43, and usually, a rotary linear motion conversion mechanism such as a ball screw mechanism or a ball and lamp mechanism is used. Will be adopted.

Then, in the disc brake 100 according to the first embodiment, at the time of braking in normal traveling, the electric motor 32 of the drive mechanism 35 is driven by a command from the control board (not shown), and the electric motor 32 of the drive mechanism 35 is driven in the forward direction, that is, in the braking direction. The rotation is transmitted to the deceleration mechanism 33 of the drive mechanism 35. Subsequently, the rotation increased by the deceleration mechanism 33 is transmitted to the thrust applying mechanism 34 of the drive mechanism 35, and the thrust applying mechanism 34 converts the rotational motion from the deceleration mechanism 33 into a linear motion to convert the piston 43 into a linear motion. The inner brake pad 2 is pressed against the disc rotor D by advancing the piston 43.

Then, due to the reaction force against the pressing force on the inner brake pad 2 by the piston 43, the caliper main body 30 makes the pair of slide pins 10 and 10 into the sliding

holes

45 and 45 of the pair of

pin sliding portions

40 and 40. By sliding in the axial direction, it moves toward the inner side with respect to the carrier 5, and presses the outer brake pads 3 in contact with the pair of

claws

39, 39 against the disc rotor D. As a result, the disc rotor D is sandwiched between the pair of inner brake pads and the

outer brake pads

2 and 3, and a frictional force is generated, which in turn generates a braking force of the vehicle.

In the disc brake 100 according to the first embodiment described above, a pair of fixing

portions

24, 24 are provided on the inner side support portion 14 of the carrier 5, and fixing holes 25 provided through the fixing

portions

24, 24 are provided. , 25 in the axial direction (fastening direction) is a direction orthogonal to the axial direction of the piston 43 (slide pin 10 and disc rotor D) and in the direction in which the inner side arm portion 20 extends (inner and outer brake pads 2 and 3). It extends parallel to the lateral direction). Further, the fixing holes 25 and 25 of the fixing

portions

24 and 24 are located within the sliding range W of the pair of slide pins 10 and 10 with respect to the sliding

holes

45 and 45 of the pair of

pin sliding portions

40 and 40. doing.

As a result, the restrictions of the fixing

portions

24 and 24 of the carrier 5 and the slide pins 10 and 10, that is, the mounting tool for mounting the carrier 5 on the non-rotating portion of the vehicle and the mounting tool for mounting the slide pin 10 are operated. A space for the carrier 5 can be secured, and the mounting position of the carrier 5 on the vehicle by the pair of fixing

holes

25, 25 is brought close to the position of the center of gravity of the caliper 4 including the carrier 5 along the axial direction of the disc rotor D. be able to. As a result, even the disc brake 100 provided with the drive mechanism 35 including the electric motor 32, the reduction mechanism 33, and the thrust applying mechanism 34 can realize the miniaturization of the carrier 5, and thus obtains high rigidity with respect to the carrier 5. It is possible to improve the responsiveness at the time of braking and the like.

Next, the disc brake 200 according to the second embodiment will be described in detail with reference to FIGS. 5 and 6. When the disc brake 200 according to the second embodiment will be described, only the differences from the disc brake 100 according to the first embodiment will be described.
In the disc brake 200 according to the second embodiment, of the pair of fixing

portions

24, 24 provided on the carrier 5, one fixing portion 24 located on the electric motor 32 side has one pin with reference to FIG. The disc rotor D does not protrude outward from the sliding portion 40 in the rotational direction, and with reference to FIG. 6, the axial direction of the fixing hole 25 is perpendicular to the axial direction of the piston 43, and the inner beam. The portion 21 extends in parallel with the extending direction, in other words, the longitudinal direction of the inner and outer brake pads 2 and 3 (rotational direction of the disc rotor D). The other fixing portion 24 of the pair of fixing

portions

24, 24 provided on the carrier 5 has the same configuration as the fixing portion 24 adopted in the disc brake 100 according to the first embodiment. Then, in the disc brake 200 according to the second embodiment, one fixing portion 24 on the electric motor 32 side can be brought closer to the axis of the piston 43. As a result, it is possible to obtain higher rigidity with respect to the carrier 5 than the disc brake 100 according to the first embodiment, and further improve the responsiveness at the time of braking or the like.

In the

disc brakes

100 and 200 according to the first and second embodiments described above, the so-called single bore type caliper in which the piston 43 is slidably arranged in one cylinder bore 38 provided in the cylinder portion 37. Although No. 4 is adopted, a so-called twin bore type caliper in which two cylinder bores 38 and 38 are provided in the cylinder portion 37 and the

pistons

43 and 43 are slidably arranged in the cylinder bores 38 and 38 respectively. It may be adopted, or a cylinder bore 38 (piston 43) having more than that may be provided. It is a type. These bores 56 and 58 have the same shape, and are provided side by side in the disk circumferential direction by aligning the positions in the disk axial direction and the disk radial direction and shifting the positions in the disk circumferential direction.

Further, in the

disc brakes

100 and 200 according to the first and second embodiments, the slide pin 10 is fixed to the carrier 5, while the pin sliding portion 40 is integrally connected to the caliper main body 30 (cylinder portion 37). However, the slide pin 10 may be fixed to the carrier main body 30, while the pin sliding portion 40 may be integrally connected to the carrier 5.

Further, according to the above-described embodiment, during braking in normal driving, the piston 43 is advanced by the brake hydraulic pressure supplied into the cylinder bore 38 of the caliper main body 30, and the disc rotor D is moved into a pair of inner and outer brake pads 2. A braking force is generated by sandwiching the piston 43 with the third unit, and the driving force from the electric motor 32 is transmitted to the piston 43 via the reduction mechanism 33 and the thrust applying mechanism 34 at the time of parking braking such as when parking. It may be used for a disc brake that moves forward and sandwiches the disc rotor D between a pair of

inner brake pads

2 and 3 to generate a braking force.

As the

disc brakes

100 and 200 based on the first and second embodiments described above, for example, those having the following aspects can be considered.
In the first aspect, in the disc brakes (100, 200), the disc brake comprises a carrier (5) having a fixed portion (24, 24) fixed to a non-rotating portion of the vehicle and a braking member (2). It has a cylinder portion (37) that accommodates a piston (43) to be pressed, and is fixed to a caliper (4) attached to the carrier (5) and either the carrier (5) or the caliper (4). The caliper (4) has a slide pin (10, 10) that makes the caliper (4) slidable in the axial direction of the wheel with respect to the carrier (5), an electric motor (32), and a reduction mechanism (33). A drive mechanism (35) for transmitting the driving force of the 32) to the piston (43) via the deceleration mechanism (33) is provided, and the fixed portions (24, 24) are non-rotating portions of the vehicle. The fastening direction with the piston (43) is parallel to the direction orthogonal to the axial direction of the piston (43).

In the second aspect, in the first aspect, the fixing portions (24, 24) are provided with fixing holes (25, 25) for fixing the carrier (5) to the non-rotating portion of the vehicle. The fixing holes (25, 25) are provided within the sliding range W of the slide pins (10, 10).
In the third aspect, in the first or second aspect, the disc brakes (100, 200) are provided on both the left and right wheels of the vehicle, respectively.

In a fourth aspect, in any of the first to third aspects, the caliper (4) has at least two or more of the pistons (43).
In a fifth aspect, in any of the second to fourth aspects, the fixing holes (25, 25) are located at the center of gravity of the caliper (4) including the carrier (5) in the axial direction of the wheel. It is provided in close proximity to.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace other configurations with respect to a part of the configurations of each embodiment.

This application claims priority based on Japanese Patent Application No. 2020-077340 filed on April 24, 2020. The entire disclosure, including the specification, claims, drawings, and abstract of Japanese Patent Application No. 2020-07734 filed on April 24, 2020, is incorporated herein by reference in its entirety.

100, 200 disc brakes, 2 inner brake pads (braking members), 3 outer brake pads (braking members), 4 calipers, 5 carriers, 10 slide pins, 24 fixing parts, 25 fixing holes, 30 caliper bodies, 32 electric motors (Electric), 33 deceleration mechanism, 35 drive mechanism, 37 cylinder, 43 piston, D disc rotor

Claims

It is a disc brake, and the disc brake is
A carrier having a fixed part fixed to the non-rotating part of the vehicle,
A caliper that has a cylinder portion that accommodates a piston that presses the braking member and is attached to the carrier, and
A slide pin that is fixed to either the carrier or the caliper and allows the caliper to slide with respect to the carrier in the axial direction of the wheel.
It has an electric motor and a deceleration mechanism, and includes a drive mechanism that transmits the driving force of the electric motor to the piston via the deceleration mechanism.
The fixed portion is a disc brake characterized in that the fastening direction with the non-rotating portion of the vehicle is parallel to the direction orthogonal to the axial direction of the piston.
In the disc brake according to claim 1,
The fixing portion is provided with a fixing hole for fixing the carrier to the non-rotating portion of the vehicle.
The disc brake is characterized in that the fixing hole is provided within the sliding range of the slide pin.
In the disc brake according to claim 1 or 2.
The disc brake is a disc brake provided on both the left and right wheels of the vehicle.
In the disc brake according to any one of claims 1 to 3.
The caliper is a disc brake characterized by having at least two or more of the pistons.
In the disc brake according to any one of claims 2 to 4.
A disc brake characterized in that the fixing hole is provided close to the position of the center of gravity of the caliper including the carrier in the axial direction of the wheel.