JP2019203592A - Brake device - Google Patents

Abstract

To obtain, for example, a new brake device which enables further reduction of rotational resistance of a brake rotor.SOLUTION: A brake device includes, for example, a brake stator, a shaft which rotates relative to the brake stator, a brake rotor which rotates with the shaft; an actuator which relatively moves the brake stator and the brake rotor close to each other in an axial direction of the shaft and causes the brake stator and the brake rotor to slide and thereby brake rotation of the shaft; and a fan which is fixed to at least one of the shaft and the brake rotor and rotates to generate airflow.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a brake device.

  2. Description of the Related Art Conventionally, an oil-cooled (liquid-cooled) brake device that suppresses a temperature rise due to frictional heat between a brake rotor and a brake stator by applying a coolant is known (see, for example, Patent Document 1).

JP 2017-155761 A

  In the brake device of Patent Document 1, since the brake rotor is always immersed in the coolant, there is a problem that the rotational resistance (the drag torque) of the brake rotor and the energy loss of the drive source are likely to increase due to the viscosity of the coolant. .

  Therefore, one of the problems of the present invention is to obtain a novel brake device that can further reduce the rotational resistance of the brake rotor, for example.

  The brake device according to the present disclosure includes, for example, a brake stator, a shaft that rotates relative to the brake stator, a brake rotor that rotates together with the shaft, and the brake stator and the brake rotor that are relatively relative to each other in the axial direction of the shaft. An actuator that brakes the rotation of the shaft by sliding the brake stator and the brake rotor close to each other, and a fan that generates airflow by rotating while being fixed to at least one of the shaft and the brake rotor And comprising.

  According to such a configuration, for example, by providing an air cooling type cooling mechanism, it is possible to reduce the rotational resistance of the brake rotor as compared with a configuration including a liquid cooling type cooling mechanism. Also, by rotating the fan integrally with the shaft or brake rotor, the device configuration can be simplified or miniaturized and energy loss can be reduced compared to the case where a mechanism for separately rotating the fan is provided. Is obtained.

  In the brake device, for example, an interlocking state where the fan is fixed to at least one of the shaft and the brake rotor and rotates, and a non-interlocking state where the fan does not rotate together with the shaft and the brake rotor. A state switching mechanism for switching is provided. According to such a configuration, for example, by switching between a linked state in which the fan is linked to the shaft or the brake rotor and a non-linked state in which the fan is linked to the shaft or the brake rotor, the fan is constantly rotated in conjunction with the shaft or the brake rotor. , Energy loss can be reduced.

  In the brake device, for example, the state switching mechanism has a base that is fixed to the brake stator and rotatably holds the fan. When the brake stator approaches the brake rotor by the actuator, the fan is The shaft is connected to at least one of the shaft and the brake rotor so as to rotate. According to such a configuration, for example, the state switching mechanism and the brake mechanism that switch between the interlocking state and the non-interlocking state can share the actuator.

  In the brake device, for example, the brake device is provided between the fan and at least one of the shaft and the brake rotor, and in the non-braking state in which the brake stator and the brake rotor are separated in the axial direction, A connection state that realizes the interlocking state by connecting at least one of the fan and the shaft and the brake rotor according to the movement of the base in the axial direction; and the fan, the shaft, and the brake rotor; A connection mechanism for switching between a disconnected state and a disconnected state that realizes the non-interlocking state. According to such a configuration, for example, the fan can be rotated in a non-braking state in which the rotation speed of the shaft and the brake rotor is higher than that in the braking state, so that the brake stator or the brake rotor can be cooled more effectively. it can.

  In the brake device, for example, the connection mechanism is connected to at least one of the shaft and the brake rotor and rotates integrally with the transmission device, and contacts the transmission unit in the connected state and the disconnected state. In the axial direction separated from the transmission portion in the connected state, and in the axial direction in response to the movement of the base portion in the axial direction in the connected state, in which the rotational torque is transmitted from the transmission portion. An elastically expandable / contractible member. According to such a configuration, for example, the base can be allowed to move in the connected state of the connection mechanism by the expansion and contraction of the expansion and contraction member, and the non-braking state and the braking state of the brake mechanism can be changed by the base. Therefore, the actuator can be easily shared by the state switching mechanism and the brake mechanism by the connection mechanism having a relatively simple structure including the expansion and contraction member.

  In the brake device, for example, the air flow passage is provided in at least one of the shaft, the actuator, the state switching mechanism, and the case that houses the brake stator, the brake rotor, and the fan. It is done. According to such a configuration, for example, the airflow passage can be configured using the components of the brake device.

FIG. 1 is an exemplary schematic configuration diagram of the brake device according to the first embodiment, showing a non-braking state of the brake mechanism and a non-interlocking state of the fan. FIG. 2 is an exemplary schematic configuration diagram of the brake device according to the first embodiment, and shows a non-braking state of the brake mechanism and an interlocking state of the fan. FIG. 3 is an exemplary schematic configuration diagram of the brake device according to the first embodiment and is a diagram illustrating a braking state of the brake mechanism. FIG. 4 is an exemplary schematic configuration diagram of a brake device according to a modification of the first embodiment, and shows a non-braking state of the brake mechanism and an interlocking state of the fan. FIG. 5 is an exemplary schematic configuration diagram of the brake device according to the second embodiment, and shows a non-braking state of the brake mechanism and a non-interlocking state of the fan. FIG. 6 is an exemplary schematic configuration diagram of the brake device according to the second embodiment, and shows a non-braking state of the brake mechanism and an interlocking state of the fan.

  Hereinafter, exemplary embodiments and modifications of the present invention will be disclosed. The configurations of the embodiments and modified examples shown below, and the operations and effects provided by the configurations are examples. The present invention can be realized by configurations other than those disclosed in the following embodiments and modifications. According to the present invention, it is possible to obtain at least one of various effects (including derivative effects) obtained by the configuration.

  In addition, similar components are included in the embodiments and modifications disclosed below. Therefore, below, the same code | symbol is provided to those similar components, and the overlapping description is abbreviate | omitted. In the present specification, ordinal numbers are used only to distinguish parts, members, parts, positions, directions, etc., and do not indicate the order or priority.

  Hereinafter, the axial direction of the rotation center Ax of the shaft 12 is simply referred to as an axial direction, the radial direction of the rotation center Ax is simply referred to as a radial direction, and the circumferential direction of the rotation center Ax is simply referred to as a circumferential direction. In the following description, for the sake of convenience, the left side of FIGS. 1 to 3 will be referred to as one or the front in the axial direction, and the right side of FIGS. In the figure, an arrow X pointing forward in the axial direction is shown.

[First Embodiment]
1 to 3 are configuration diagrams of the brake device 100. FIG. 1 shows a non-braking state of the brake mechanism 10 and a non-interlocking state of the fan 30, and FIG. 2 shows a non-braking state of the brake mechanism 10 and a fan. FIG. 3 shows a braking state of the brake mechanism 10. As shown in FIG. 1, the brake device 100 includes a brake mechanism 10, an actuator 20, a fan 30, and a connection mechanism 40.

  The brake device 100 decelerates the vehicle in the brake mechanism 10 by friction-braking the disk rotor 13 that rotates in conjunction with a rotating body (not shown) included in a rotation transmission path from the vehicle drive source to the wheels. . That is, the brake device 100 is a vehicle braking device. The actuator 20 switches the braking state (FIG. 3) and the non-braking state (FIG. 2) of the disc rotor 13 in the brake mechanism 10 by moving the pressing member 22 in the axial direction. In the present embodiment, the actuator 20 moves the pressing member 22 in the axial direction to switch between the interlocking state (FIG. 2) and the non-interlocking state (FIG. 1) of the fan 30. The fan 30 is fixed to the shaft 12 in the interlocking state (FIG. 2) in the non-braking state and rotates integrally with the shaft 12, thereby generating an air flow W that acts on the disc rotor 13 and the friction material 14. Thereby, the temperature rise accompanying the frictional heat of the disk rotor 13 and the friction material 14 is suppressed. The position of the pressing member 22 in FIG. 1 is also referred to as an initial position, the position of the pressing member 22 in FIG. 2 is also referred to as a first position, and the position of the pressing member 22 in FIG. The pressing member 22 is an example of a base portion of a state switching mechanism.

  As shown in FIG. 1, the brake mechanism 10 includes a case 11, a shaft 12, a disk rotor 13, a friction material 14, and an urging member 16.

  The case 11 is configured in a cylindrical shape. The case 11 has a front wall 11a, a rear wall 11b, and a peripheral wall 11c. Both the front wall 11a and the rear wall 11b extend along a direction intersecting (orthogonal) with the axial direction, and are provided in parallel to each other with an interval in the axial direction. The front wall 11a and the rear wall 11b are configured in a disc shape. The front wall 11a and the rear wall 11b may also be referred to as end walls.

  The peripheral wall 11c extends in the axial direction between the outer edge of the front wall 11a and the outer edge of the rear wall 11b. The peripheral wall 11c is configured in a cylindrical shape. The peripheral wall 11c can also be referred to as a side wall. The center line of the peripheral wall 11c substantially coincides with the rotation center Ax, but is not limited to this. Moreover, although the material of case 11 is a metal material like an aluminum alloy, for example, it is not limited to this.

  Inside the case 11, a storage chamber R surrounded by a front wall 11a, a rear wall 11b, and a peripheral wall 11c is provided. In the storage chamber R, the shaft 12, the disk rotor 13, the friction material 14, the actuator 20, the fan 30, the connection mechanism 40, and the like are stored. A part of the shaft 12 protrudes forward in the axial direction from the storage chamber R, and a part of the actuator 20 protrudes rearward in the axial direction from the storage chamber R.

  The shaft 12 passes through a through hole 11a1 provided in the front wall 11a and extends in the axial direction. The shaft 12 is supported by the front wall 11a via a bearing 15a so as to be rotatable around the rotation center Ax.

  The disk rotor 13 is configured in a disk shape having a predetermined thickness in the axial direction. A through hole 13c is provided at the center of the disk rotor 13 along the rotation center Ax. The shaft 12 passes through the through hole 13c. The disk rotor 13 is coupled to the shaft 12 via, for example, a spline fitting structure. In other words, the disk rotor 13 rotates integrally with the shaft 12 in the circumferential direction and can move relative to the shaft 12 in the axial direction.

  The friction material 14 has a front pad 14a and a rear pad 14b. The front pad 14 a is located in front of the disk rotor 13, and the rear pad 14 b is located behind the disk rotor 13. The front pad 14 a is fixed to the front wall 11 a of the case 11, and the rear pad 14 b is fixed to the pressing member 22. The front pad 14a and the rear pad 14b are arranged in an annular shape along the outer peripheral portion of the disk rotor 13, respectively. The friction material 14 is an example of a brake stator.

  Further, the disc rotor 13 has a braked surface 13a facing the front pad 14a and a braked surface 13b facing the rear pad 14b. The braked surfaces 13a and 13b face the opposite sides in the axial direction. The braked surfaces 13a and 13b are slidable in the circumferential direction with each of the front pad 14a and the rear pad 14b. The disk rotor 13 is an example of a brake rotor and can also be referred to as a braked member. The friction material 14 may be provided on the disk rotor 13. In this case, the friction material 14 is an example of a brake rotor, and the front wall 11a (case 11) and the pressing member 22 are examples of a brake stator.

  The urging member 16 is provided between the front wall 11 a and the disk rotor 13. The biasing member 16 is, for example, a compression spring that can be elastically compressed in the axial direction. The urging member 16 urges the disk rotor 13 in a direction away from the front wall 11a and the front pad 14a, and separates the disk rotor 13 from the front pad 14a rearward when the brake mechanism 10 is released, that is, not braked.

  The actuator 20 includes a motor 21, a motor shaft 21 a, and a pressing member 22. The motor shaft 21a extends in the axial direction. The rotation center of the motor shaft 21a and the rotation center Ax of the shaft 12 are aligned in the axial direction. The motor 21 can rotate the motor shaft 21a with the supplied electric power.

  The pressing member 22 is configured in a disk shape having a predetermined thickness in the axial direction. A through hole 22 a is provided at the center of the pressing member 22 along the rotation center Ax. The motor shaft 21a penetrates the through hole 22a and the through hole 11b1 provided in the central portion of the rear wall 11b in the axial direction. The motor shaft 21a is supported on the rear wall 11b via a bearing 15b so as to be rotatable around the rotation center Ax.

  The pressing member 22 is located behind the disk rotor 13, that is, on the opposite side in the axial direction from the front pad 14a. The pressing member 22 is connected to the motor shaft 21 a via a motion conversion mechanism 23 that converts the rotation of the motor shaft 21 a into the linear motion of the pressing member 22.

  The motion conversion mechanism 23 includes a male screw 21a1, a female screw 22a1, and a rotation restricting portion 23a. The male screw 21a1 is provided on the outer periphery of the motor shaft 21a. The female screw 22a1 is provided on the inner periphery of the through hole 22a of the pressing member 22, and meshes with the male screw 21a1. For example, the rotation restricting portion 23a is provided on the peripheral wall 11c of the case 11, restricts the rotation of the rear pad 14b and the pressing member 22, and guides the movement in the axial direction. The rotation limiting portion 23a is a plane (inner surface) extending in the axial direction of the peripheral wall 11c, but is not limited thereto. The rotation limiting unit 23a can also be referred to as a guide unit.

  By the motion conversion mechanism 23, the rotation of the motor shaft 21a in a predetermined direction is converted into a linear forward movement in the axial direction approaching the front wall 11a of the pressing member 22. On the other hand, the rotation of the motor shaft 21a in the direction opposite to the predetermined direction is converted into a linear motion backward in the axial direction away from the front wall 11a of the pressing member 22. The motion conversion mechanism 23 is not limited to the one having a screw mechanism including a male screw 21a1 and a female screw 22a1 that mesh with each other. Moreover, although the actuator 20 was the structure containing the motor 21 in this embodiment, it is not limited to this, For example, you may have a piston (cylinder) of fluid pressure.

  Further, a through hole 25 is provided along the rotation center Ax at the center of the motor 21 and the motor shaft 21a. The front end portion of the through hole 25 faces the fan 30 in the case 11, and the rear end portion of the through hole 25 faces the space outside the case 11. The through hole 25 functions as an introduction passage or a discharge passage for the air flow W in the interlocking state of the fan 30 and the shaft 12 (FIG. 2). The through hole 25 is an example of a passage.

  Further, the peripheral wall 11c is provided with a through hole 11d along the radial direction. The through hole 11d is located outward in the radial direction of the disk rotor 13, and the through hole 11d and the disk rotor 13 are aligned in the radial direction. The through-hole 11d may be a ring-shaped slit or may be provided intermittently in the circumferential direction. The through-hole 11d functions as an introduction passage or a discharge passage for the air flow W when the fan 30 and the shaft 12 are linked. The through hole 11d is an example of a passage. The through hole 11d is not limited to this example, and may be provided between the front side pad 14a and the biasing member 16 on the front wall 11a, for example.

  The fan 30 is, for example, an axial flow type propeller fan. The rotation center of the fan 30 and the rotation center Ax of the shaft 12 are aligned in the axial direction. The fan 30 is supported by the pressing member 22 via a bearing 15c so as to be rotatable around the rotation center Ax. The fan 30 can rotate relative to the pressing member 22 in the circumferential direction, and can move integrally with the pressing member 22 in the axial direction. The bearing 15c and the pressing member 22 are an example of a state switching mechanism.

  The connection mechanism 40 includes a connection plate 41 and a spring 42. The connection plate 41 is formed in a disk shape that intersects (orthogonally) the axial direction. The connection plate 41 has a connection position P2 (FIG. 2) in contact with the rear end surface 12a of the shaft 12 and a separation position P1 (FIG. 1) separated from the rear end surface 12a according to the movement of the pressing member 22 in the axial direction. And can be moved between. In the connection position P2, a rotational torque is transmitted from the rear end surface 12a to the connection plate 41, whereby an interlocking state in which the shaft 12 and the fan 30 rotate integrally is obtained. On the other hand, in the separation position P1, the non-interlocking state in which the shaft 12 and the fan 30 are separated is obtained by separating the connection plate 41 rearward from the rear end surface 12a. The rear end surface 12a is an example of a transmission part, and the connection plate 41 is an example of a transmitted part.

  The spring 42 is interposed between the connection plate 41 and the fan 30. The spring 42 is, for example, a compression spring that can be elastically compressed in the axial direction. The spring 42 urges the connection plate 41 in a direction approaching the rear end surface 12a, thereby increasing the surface pressure between the connection plate 41 and the rear end surface 12a at the connection position P2. The spring 42 elastically expands and contracts between the non-braking state (FIG. 2) and the braking state (FIG. 3) of the brake mechanism 10, thereby maintaining the connection state of the connection mechanism 40. It is possible to change the braking state (non-braking state). The spring 42 is an example of an elastic member.

  In the brake device 100 having such a configuration, when the actuator 20 brings the pressing member 22 close to the front wall 11a, the fan 30 is pushed by the pressing member 22 and moves forward in the axial direction so as to approach the front wall 11a. . In this case, the fan 30 is in an interlocked state in which the connection plate 41 and the rear end surface 12a are in contact as shown in FIG. On the other hand, when the actuator 20 moves the pressing member 22 away from the front wall 11a, the fan 30 moves rearward in the axial direction so as to move away from the front wall 11a. In this case, the fan 30 is in a non-interlocking state in which the connection plate 41 and the rear end surface 12a are separated as shown in FIG.

  In the interlocked state of the fan 30 and the shaft 12 (FIG. 2), the fan 30 rotates in a predetermined direction and is introduced into the case 11 from the through hole 25 and passes through between the disk rotor 13 and the friction material 14. An air flow W discharged from the case 11 through the hole 11d is generated. On the other hand, when the fan 30 rotates in a direction opposite to the predetermined direction, the fan 30 is introduced into the case 11 from the through hole 11 d and is discharged from the through hole 25 to the outside of the case 11 through the space between the disk rotor 13 and the friction material 14. An air flow W is generated. The fan 30 is not limited to the axial flow type propeller fan, and may be a centrifugal sirocco fan, a turbo fan, a mixed flow type propeller fan, or the like.

  Further, when the actuator 20 further moves the pressing member 22 toward the front wall 11a from the interlocked state of the fan 30 (FIG. 2), the disk rotor 13 is pushed by the pressing member 22 so as to approach the front wall 11a. Move to. In this case, the disk rotor 13 is sandwiched in the axial direction by the friction material 14. As the braked surfaces 13a and 13b of the disk rotor 13 slide with the friction material 14, the brake mechanism 10 enters a braking state in which the disk rotor 13 is frictionally braked as shown in FIG. On the other hand, when the actuator 20 moves the pressing member 22 away from the front wall 11a, the disk rotor 13 moves rearward in the axial direction so as to move away from the front wall 11a by the biasing force of the biasing member 16. In this case, the brake mechanism 10 is in a non-braking state in which the friction braking of the disk rotor 13 is released as shown in FIG.

  In the braking state of FIG. 3, frictional heat is generated by frictional sliding between the disk rotor 13 and the friction material 14. In this case, the fan 30 rotates at a low speed in conjunction with the shaft 12 and the disk rotor 13 or stops rotating. On the other hand, when braking in the brake mechanism 10 is released and the non-braking state of FIG. 2 is achieved, the fan 30 rotates at a higher speed than the braking state of FIG. 3 in conjunction with the shaft 12 and the disk rotor 13. Thereby, the air flow W which acts on the disk rotor 13 and the friction material 14 is produced, and the temperature rise accompanying friction heat can be suppressed effectively.

  As described above, in this embodiment, the brake device 100 is a fan that generates an air flow W acting on the friction material 14 (brake stator) and the disk rotor 13 (brake rotor) by being fixed to the shaft 12 and rotating. 30. According to such a configuration, for example, by providing an air cooling type cooling mechanism, it is possible to reduce the rotational resistance of the disk rotor 13 as compared with a configuration including a liquid cooling type cooling mechanism. Further, by rotating the fan 30 integrally with the shaft 12, the configuration of the brake device 100 can be simplified or reduced in size and energy loss can be reduced as compared with the case where a mechanism for separately rotating the fan 30 is provided. You can get the benefits.

  Further, in the present embodiment, the brake device 100 includes a pressing member 22 (state switching mechanism) that switches between an interlocking state in which the fan 30 is fixed to the shaft 12 and rotating and a non-interlocking state in which the fan 30 does not rotate with the shaft 12. Is provided. According to such a configuration, for example, by switching between an interlocking state in which the fan 30 is interlocked with the shaft 12 and a non-interlocking state in which the fan 30 is interlocked, the energy of the fan 30 is constantly increased in association with the shaft 12. Loss can be reduced.

  In the present embodiment, the pressing member 22 (base) is fixed to the friction material 14 and holds the fan 30 rotatably. When the friction material 14 approaches the disk rotor 13 by the actuator 20, the fan 30 is moved to the shaft 12. It is comprised so that it may be connected to and rotate. According to such a configuration, for example, the actuator 20 can be shared by the pressing member 22 and the brake mechanism 10 that switch between the interlocking state and the non-interlocking state.

  In the present embodiment, the brake device 100 is provided between the fan 30 and the shaft 12, and the fan 30 and the shaft 12 are moved according to the axial movement of the pressing member 22 (base) in the non-braking state. Are connected to each other, and a connection mechanism 40 that switches between a connection state that realizes the interlocking state and a separation state that realizes the non-interlocking state by separating the fan 30 and the shaft 12 is provided. According to such a configuration, for example, the fan 30 can be rotated in a non-braking state in which the rotation speed of the shaft 12 and the disk rotor 13 is higher than that in the braking state, so that the friction material 14 and the disk rotor 13 are more effective. Can be cooled to. Further, by switching between the interlocking state and the non-interlocking state in the non-braking state, for example, the friction material 14 and the disc rotor 13 can be cooled as the interlocking state when the temperature detected by the sensor is equal to or higher than a threshold value. The energy loss due to the rotation of the fan 30 can be reduced compared to the configuration that is always in the interlocking state.

  In the present embodiment, the connection mechanism 40 is in contact with the rear end surface 12a (transmission portion) in the connected state and is separated from the rear end surface 12a in the axial direction in the disconnected state, and rotational torque is transmitted from the rear end surface 12a in the connected state. And a spring 42 (extensible member) that can elastically expand and contract in the axial direction in accordance with the movement of the pressing member 22 in the axial direction in the connected state. According to such a configuration, for example, the movement of the pressing member 22 is allowed in the connected state of the connection mechanism 40 by expansion and contraction of the spring 42, and the braking state and the non-braking state of the brake mechanism 10 are changed by the pressing member 22. be able to. Therefore, the actuator 20 can be easily shared by the pressing member 22 (state switching mechanism) and the brake mechanism 10 by the connection mechanism 40 having a relatively simple configuration including the spring 42.

  In the present embodiment, the actuator 20 and the case 11 are provided with through holes 25 and 11 d (passages) for the air flow W. According to such a configuration, for example, the passage of the air flow W can be configured using the components of the brake device 100.

[Modification of First Embodiment]
FIG. 4 is a configuration diagram of a brake device 100A according to this modification. The brake device 100A has the same configuration as the brake device 100 of the above embodiment. Therefore, the brake device 100A can obtain the same operations and effects as those of the first embodiment based on the same configuration.

  However, in this modified example, as shown in FIG. 4, the shaft 12 and the connecting plate 41 are provided with through holes 12b and 41a along the rotation center Ax, respectively, which is different from the above embodiment. . The through hole 12b and the through hole 41a are arranged in the axial direction. The rear end portion of the through hole 12b faces the fan 30 in the case 11 through the through hole 41a, and the front end portion of the through hole 12b faces the space outside the case 11. The front end portion of the through hole 12b is opened, for example, outward in the radial direction of the shaft 12. The through holes 12b and 41a function as an introduction passage or a discharge passage for the air flow W when the fan 30 and the shaft 12 are interlocked (FIG. 4). The through holes 12b and 41a are examples of passages.

  In such a configuration, the rotation of the fan 30 in a predetermined direction causes the fan 30 to be introduced into the case 11 from the through holes 12b and 41a, and between the disk rotor 13 and the friction material 14 to pass out of the case 11 from the through hole 11d. A discharged air stream W is generated. On the other hand, when the fan 30 rotates in a direction opposite to the predetermined direction, the fan 30 is introduced into the case 11 from the through hole 11d and passes through the space between the disk rotor 13 and the friction material 14 and from the through holes 41a and 12b to the outside of the case 11. A discharged air stream W is generated. Thus, also by this modification, the channel | path of the airflow W can be comprised using the component of 100 A of brake devices.

[Second Embodiment]
5 and 6 are configuration diagrams of the brake device 100B according to the present embodiment. FIG. 5 illustrates the brake mechanism 10 in a non-braking state and the fan 30 in an unlinked state. FIG. The braking state and the interlocking state of the fan 30 are shown. The brake device 100B has the same configuration as that of the above-described embodiment or modification. Therefore, the brake device 100B can obtain the same operations and effects as those of the above-described embodiments and modifications based on the same configuration.

  However, in this embodiment, as shown in FIGS. 5 and 6, the point that the opening 22 b is provided in the pressing member 22 is different from the above embodiment and the modification. The opening 22b has a substantially L-shaped cross section, one end is opened toward the inside in the radial direction of the pressing member 22, and the other end is opened toward the rear in the axial direction of the pressing member 22. . Further, the rear wall 11b of the case 11 is provided with a through hole 11e along the axial direction. The rear end portion of the opening 22b faces the through hole 11e. On the other hand, the front end portion of the opening 22b is covered and hidden by the motor shaft 21a when the fan 30 is not interlocked (FIG. 5), and is exposed from the motor shaft 21a when the fan 30 is interlocked (FIG. 6). To face. The through hole 11e and the opening 22b function as an introduction passage or a discharge passage for the air flow W in the interlocked state of the fan 30 and the shaft 12 (FIG. 6). The through hole 11e and the opening 22b are an example of a passage.

  In such a configuration, the rotation of the fan 30 in a predetermined direction causes the case 11 to be introduced from the through hole 11e into the case 11 and through the opening 22b, the disk rotor 13 and the friction material 14, and from the through hole 11d. An air flow W discharged outside is generated. On the other hand, when the fan 30 rotates in a direction opposite to the predetermined direction, the case 11 is introduced into the case 11 from the through hole 11d and between the disk rotor 13 and the friction material 14 and through the opening 22b. An air flow W discharged outside is generated. Thus, also by this embodiment, the passage of the airflow W can be configured using the components of the brake device 100B.

  As mentioned above, although embodiment and the modification of this invention were illustrated, the said embodiment and modification are examples, Comprising: It is not intending limiting the range of invention. The above-described embodiments and modifications can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. In addition, specifications (structure, type, direction, form, size, length, width, thickness, height, number, arrangement, position, material, etc.) of each configuration, shape, etc. are changed as appropriate. Can be implemented.

  For example, the fan and the connection mechanism are provided so as to be able to contact and separate from the shaft. However, the fan and the connection mechanism are not limited thereto, and may be provided so as to be able to contact and separate from the disk rotor. It may be provided.

  DESCRIPTION OF SYMBOLS 100, 100A, 100B ... Brake device, 10 ... Brake mechanism, 11 ... Case, 11d, 11e ... Through-hole (passage), 12 ... Shaft, 12a ... Rear end surface (transmission part), 13 ... Disc rotor (brake rotor), DESCRIPTION OF SYMBOLS 14 ... Friction material (brake stator), 15c ... Bearing (state switching mechanism), 20 ... Actuator, 22 ... Pressing member (state switching mechanism, base), 25, 12b ... Through-hole (passage), 30 ... Fan, 40 ... Connection mechanism 41... Connection plate (transmitted part) 42... Spring (expandable member), Ax... Rotation center, W.

Claims (6)

A brake stator,
A shaft that rotates relative to the brake stator;
A brake rotor that rotates with the shaft;
An actuator that brakes rotation of the shaft by causing the brake stator and the brake rotor to move relatively close to each other in the axial direction of the shaft and sliding the brake stator and the brake rotor;
A fan that generates an airflow by rotating while being fixed to at least one of the shaft and the brake rotor;
Brake device with   A state switching mechanism that switches between an interlocking state in which the fan is fixed and rotated on at least one of the shaft and the brake rotor and a non-interlocking state in which the fan does not rotate with the shaft and the brake rotor. Item 4. The brake device according to item 1.   The state switching mechanism has a base fixed to the brake stator and rotatably holding the fan, and when the brake stator approaches the brake rotor by the actuator, the fan is at least one of the shaft and the brake rotor. The brake device according to claim 2, wherein the brake device is connected to one side and configured to rotate.   Provided between the fan and at least one of the shaft and the brake rotor, and in a non-braking state in which the brake stator and the brake rotor are separated in the axial direction, the base portion is moved in the axial direction. Accordingly, the connected state in which the fan is connected to at least one of the shaft and the brake rotor to realize the interlocked state, and the non-interlocked state is realized by separating the fan from the shaft and the brake rotor. The brake device according to claim 3, further comprising a connection mechanism that switches between a disconnected state and a disconnected state. The connection mechanism is
A transmission unit connected to at least one of the shaft and the brake rotor and rotating integrally;
A transmitted portion that is in contact with the transmitting portion in the connected state and is spaced apart from the transmitting portion in the axial direction in the disconnected state and in which rotational torque is transmitted from the transmitting portion in the connected state;
In the connected state, an elastic member that can elastically expand and contract in the axial direction according to the movement of the base in the axial direction;
The brake device according to claim 4, comprising: The air flow passage is provided in at least one of the shaft, the actuator, the state switching mechanism, and the case that houses the brake stator, the brake rotor, and the fan. The brake device as described in any one of them.

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