Electric brake device

Abstract

The invention relates to an electric brake device. An electric brake device (10) is provided with an actuator unit (20). The actuator unit (20) applies a braking force to the wheels in accordance with the rotation of the electric motor (12) transmitted by the transmission mechanism (30). An electric brake device (10) is provided with a circuit unit (60) for controlling an actuator unit (20). An electric brake device (10) is provided with a rotation angle sensor (62) comprising a detected part (64) attached to a motor shaft member (13) and a detection part (63) provided to a circuit part (60). The electric brake device (10) is provided with a partition wall (70) that partitions a first space in which the transmission mechanism (30) is disposed and a second space in which the circuit unit (60) is disposed. The partition wall (70) is provided with a through hole (71t). The portion to be detected (64) is disposed in the through hole (71t).

Description

Technical Field

[0001] The invention relates to an electric brake device. Background Art

[0002] Patent Document 1 discloses a brake device having a non-contact sensor for detecting the rotation angle of an electric motor. The brake device disclosed in Patent Document 1 has a partition wall for protecting electronic components from foreign matter such as wear powder and lubricant. The shaft of the electric motor and the sensor element are arranged to sandwich the partition wall.

[0003] Patent document 1: German Patent Application Publication No. 102009046044

[0004] In the brake device disclosed in Patent Document 1, a partition wall is disposed between the magnet attached to the shaft and the sensor element, so there is a problem that the distance between the magnet and the sensor element is large, which may reduce the detection accuracy of the sensor. Summary of the invention

[0005] The main purpose of the electric brake device for solving the above-mentioned problems is to include: a transmission mechanism for transmitting the rotation of a motor shaft component of an electric motor; an actuator unit for moving a friction member according to the rotation of the electric motor transmitted by the transmission mechanism, and applying a braking force to the wheel by pressing the friction member against a rotating body that rotates integrally with the wheel; a circuit unit for controlling the actuator unit; a rotation angle sensor composed of a detected portion mounted on the motor shaft component and a detecting portion for detecting an output from the detected portion, and detecting the rotation angle of the electric motor, wherein the detecting portion is arranged in the circuit unit; and a partition wall for dividing a first space and a second space, wherein the first space is a space for configuring the transmission mechanism, and the second space is a space for configuring the circuit unit, and a hole is arranged in the partition wall, wherein the hole is a through hole or a non-through hole, and at least one of at least a portion of the rotation angle sensor and a portion of the motor shaft component is arranged in the hole.

[0006] In the above structure, by providing a hole in the partition wall, even if a partition wall is provided to divide the first space where the transmission mechanism is provided and the second space where the circuit unit is provided, it is easy to arrange the detected unit and the detecting unit constituting the rotation angle sensor close to each other. Therefore, even if a partition wall is provided, the detecting unit can be arranged at a position where the magnetic flux density is relatively high. Thus, while reducing the decrease in the detection accuracy of the rotation angle sensor, the partition wall can suppress the intrusion of foreign matter such as wear powder and lubricant into the second space. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a partial cross-sectional view showing the electric brake device according to the first embodiment.

[0008] Figure 2 It is a partial cross-sectional view showing the electric brake device according to the first embodiment.

[0009] Figure 3 It is a cross-sectional view showing an electric brake device according to a second embodiment.

[0010] Figure 4 It is a cross-sectional view showing an electric brake device according to a modified example.

[0011] Figure 5 It is a cross-sectional view showing another modified example of the electric brake device.

[0012] Figure 6 It is a cross-sectional view showing another modified example of the electric brake device.

[0013] Figure 7 It is a cross-sectional view showing another modified example of the electric brake device.

[0014] Figure 8 This is a cross-sectional view showing an electric brake device in which a bearing is provided in a hole of a partition wall as a modified example.

[0015] Fig. 9 This is a cross-sectional view showing an electric brake device in which a washer is provided in the hole of the partition wall as a modified example.

[0016] Fig.10 Yes means Fig. 9 A front view of a washer included in the electric brake device.

[0017] Fig.11 This is a cross-sectional view showing an electric brake device including a film for blocking a through hole of a partition wall as a modified example.

[0018] Fig.12 This is a cross-sectional view showing another modified example of an electric brake device including a thin film for blocking the through-hole of the partition wall.

[0019] Fig.13 It is a cross-sectional view showing an electric brake device in which a non-through hole is provided in the partition wall as a modified example.

[0020] Fig.14 This is a cross-sectional view of an electric brake device showing another modified example in which a non-through hole is provided in the partition wall. DETAILED DESCRIPTION

[0021] (First Embodiment)

[0022] Reference Figure 1-2 An electric brake device 10 as a first embodiment of the electric brake device will be described.

[0023] <Electric brake device>

[0024] The electric brake device 10 includes a transmission mechanism 30 that transmits the rotation of the motor shaft member 13 of the electric motor 12. The electric brake device 10 includes an actuator unit 20 that moves the friction member 22 according to the rotation of the electric motor 12 transmitted by the transmission mechanism 30, and applies a braking force to the wheel by pressing the friction member 22 against the rotating body 21 that rotates integrally with the wheel. The electric brake device 10 includes a circuit unit 60 that controls the actuator unit 20. The electric brake device 10 includes a rotation angle sensor 62, which is composed of a detected portion 64 mounted on the motor shaft member 13 and a detection portion 63 provided in the circuit unit 60 and detecting an output from the detected portion 64, and detects the rotation angle of the electric motor 12. The electric brake device 10 includes a partition wall 70 that divides a first space, which is a space where the transmission mechanism 30 is arranged, and a second space, which is a space where the circuit unit 60 is arranged. A through hole 71t is provided in the partition wall 70. At least a part of the rotation angle sensor 62 is arranged in the through hole 71t.

[0025] Figure 1 as well as Figure 2 The electric brake device 10 is shown. The electric brake device 10 includes a housing 11a, a cover 11b, and a caliper housing 23. The cover 11b covers the opening of the housing 11a. The caliper housing 23 is attached to the housing 11a. The housing 11a is closed.

[0026] The electric brake device 10 includes an actuator unit 20. Figure 1 As shown, the actuator unit 20 includes a friction member 22 that can be pressed against a rotating body 21 that rotates integrally with a wheel of a vehicle. The rotating body 21 is, for example, a brake disc. The actuator unit 20 can generate a greater braking force as it increases the force that presses the friction member 22 against the rotating body 21.

[0027] The electric brake device 10 includes an electric motor 12. Figure 1 as well as Figure 2 In the figure, a line along the axis of the motor shaft member 13 of the electric motor 12 is shown as an input axis C1.

[0028] like Figure 2As shown, the actuator unit 20 includes a conversion mechanism 40 that converts the rotational motion of the electric motor 12 into a linear motion. The conversion mechanism 40 is, for example, a feed screw composed of a screw shaft and a nut. The actuator unit 20 includes a piston 41 on which the friction member 22 is mounted at the end facing the rotating body 21. The conversion mechanism 40 and the piston 41 are accommodated in the caliper housing 23. The actuator unit 20 can move the piston 41, that is, move the friction member 22, by using the linear motion converted from the rotational motion of the electric motor 12 by the conversion mechanism 40. One of the directions in which the piston 41 is moved by the linear motion is a direction in which the friction member 22 mounted on the piston 41 is close to the rotating body 21. The other direction in which the piston 41 is moved by the linear motion is a direction in which the friction member 22 mounted on the piston 41 is away from the rotating body 21.

[0029] like Figure 2 As shown, the actuator unit 20 includes a transmission mechanism 30 that transmits the rotational motion of the electric motor 12 to the conversion mechanism 40. The transmission mechanism 30 may include a speed reduction mechanism. An example of the transmission mechanism 30 will be described.

[0030] The transmission mechanism 30 is composed of a combination of gears and the like. The transmission mechanism 30 includes an input gear 31. For example, the input gear 31 is mounted on the motor shaft member 13. The input gear 31 may also be formed by forming teeth on the surface of the motor shaft member 13. The transmission mechanism 30 includes an output gear 33. The transmission mechanism 30 includes an output shaft member 39. The output gear 33 is mounted on the output shaft member 39. Figure 2 In the figure, a line along the axis of the output shaft member 39 is shown as the output shaft C2. In one example of the transmission mechanism 30, the output shaft C2 is located parallel to the input shaft C1.

[0031] The transmission mechanism 30 may also include an intermediate gear 32. The transmission mechanism 30 may also include an intermediate shaft member 38 on which the intermediate gear 32 is mounted. For example, the intermediate gear 32 includes a first gear portion that can mesh with the input gear 31 and a second gear portion that can mesh with the output gear 33. In the intermediate gear 32, the first gear portion and the second gear portion rotate integrally. In an example of the intermediate gear 32, as shown in FIG. Figure 1 As shown, the first gear portion and the second gear portion are integrally formed. For example, the transmission mechanism 30 may also include a first intermediate gear corresponding to the first gear portion that can mesh with the input gear 31 and a second intermediate gear corresponding to the second gear portion that can mesh with the output gear 33 as different components. A plurality of intermediate gears may be mounted on the intermediate shaft component 38.

[0032] In the transmission mechanism 30, the rotation of the motor shaft member 13 is input to the input gear 31. The output gear 33 can rotate according to the rotation of the input gear 31. The output gear 33 transmits the rotation to the actuator part 20 via the output shaft member 39. More specifically, the rotational motion of the electric motor 12 can be transmitted from the motor shaft member 13 to the intermediate shaft member 38 by meshing the input gear 31 with the first gear portion of the intermediate gear 32. The rotational motion of the electric motor 12 can be transmitted from the intermediate shaft member 38 to the output shaft member 39 by meshing the second gear portion of the intermediate gear 32 with the output gear 33. The output shaft member 39 is connected to the conversion mechanism 40. The output gear 33 transmits the rotational motion to the conversion mechanism 40 by rotating the output shaft member 39.

[0033] In addition, although Figure 2 Although one intermediate gear 32 is illustrated in the figure, a plurality of gears that contribute to the transmission of the rotational motion may be interposed between the input gear 31 and the output gear 33 as the transmission mechanism 30 .

[0034] The electric brake device 10 includes a circuit unit 60. The circuit unit 60 includes a processing circuit for controlling the rotational motion of the electric motor 12. The circuit unit 60 can control the actuator unit 20 by controlling the electric motor 12. The circuit unit 60 is accommodated in the housing 11a. For example, the circuit unit 60 includes a circuit substrate 61 and a mounting component mounted on the circuit substrate 61. Figure 1 as well as Figure 2 2 shows an example in which the circuit unit 60 is installed so that the input axis C1, which is a line along the axis of the motor shaft member 13, intersects the circuit unit 60. More specifically, the circuit unit 60 is arranged so that the input axis C1 and the circuit board 61 are perpendicular to each other.

[0035] The electric brake device 10 includes a rotation angle sensor 62 for detecting the rotation angle of the motor shaft member 13. An example of the rotation angle sensor 62 is a non-contact type sensor. As an example of the non-contact type sensor, a magnetic sensor can be mentioned.

[0036] The electric brake device 10 includes a partition wall 70 in the housing 11a. For example, the housing 11a can be divided into a housing portion for accommodating the circuit portion 60 by the partition wall 70. More specifically, the first housing portion 18 for accommodating the electric motor 12 and the second housing portion 19 for accommodating the circuit portion 60 can be divided by the partition wall 70. The transmission mechanism 30 is accommodated in the first housing portion 18. The internal space of the first housing portion 18 corresponds to the "first space". The internal space of the second housing portion 19 corresponds to the "second space".

[0037] like Figure 1As shown, the electric brake device 10 may also include a rotation stop mechanism 50. The rotation stop mechanism 50 can maintain the braking force applied by the actuator unit 20. By operating the rotation stop mechanism 50, for example, a parking brake function can be realized. The rotation stop mechanism 50 includes, for example, a solenoid unit 53 and an engaging unit 52 that can be moved by the solenoid unit 53. For example, the rotation stop mechanism 50 is accommodated in the first accommodation unit 18.

[0038] An example of the rotation stopping mechanism 50 functions as a ratchet mechanism. In this case, the rotation stopping mechanism 50 constitutes a ratchet mechanism together with a ratchet gear 51 mounted on the motor shaft member 13. For example, the ratchet gear 51 is formed integrally with the input gear 31. As another example, the ratchet gear 51 may be mounted on the motor shaft member 13 as a member different from the input gear 31. If the engaging portion 52 in contact with the ratchet gear 51 and the teeth of the ratchet gear 51 are meshed, the ratchet gear 51 cannot rotate. The rotation stopping mechanism 50 stops the rotation of the electric motor 12 by making the ratchet gear 51 unable to rotate. In the rotation stopping mechanism 50, the rotation in the direction of reducing the braking force in the rotation direction of the electric motor 12 can be stopped. Thus, the rotation stopping mechanism 50 can maintain the braking force applied to the wheel by the actuator unit 20. On the other hand, in the rotation stopping mechanism 50, the rotation in the direction of increasing the braking force in the rotation direction of the electric motor 12 can be allowed. The rotation stopping mechanism 50 can release the maintenance of the braking force by eliminating the meshing between the engagement portion 52 and the ratchet gear 51 .

[0039] The solenoid portion 53 of the rotation stopping mechanism 50 is provided with a solenoid terminal. The solenoid terminal is connected to the circuit portion 60, for example. The solenoid terminal is inserted into a terminal through hole formed in the partition wall 70, for example, and penetrates the partition wall 70 to be connected to the circuit portion 60. As another example, the solenoid terminal may be connected to the circuit portion 60 via a connector and wiring, etc. The path connecting the solenoid terminal and the circuit portion 60 is not limited to penetrating the partition wall 70, and may bypass the partition wall 70.

[0040] The electric brake device 10 may also include a motor bracket 81. For example, the electric motor 12 and the rotation stopping mechanism 50 are mounted on the motor bracket 81. The motor bracket 81 may also include a transmission shaft hole 86. The shaft member provided by the transmission mechanism 30 can be inserted into the transmission shaft hole 86. For example, Figure 2 As shown, the intermediate shaft member 38 can be inserted into the transmission shaft hole 86 .

[0041] The motor bracket 81 is fixed to the housing 11a. That is, the electric motor 12 is fixed via the motor bracket 81. In addition, the rotation stop mechanism 50 is fixed via the motor bracket 81. In the electric brake device 10, the electric motor 12 and the rotation stop mechanism 50 are integrated through the motor bracket 81 to form a parking brake unit 80. The parking brake unit 80 is accommodated in the housing 11a.

[0042] <Rotation angle sensor>

[0043] like Figure 1 as well as Figure 2 As shown, the rotation angle sensor 62 is composed of a detection portion 63 and a detected portion 64. For example, the detection portion 63 is mounted on the circuit board 61. The detected portion 64 is mounted on the motor shaft member 13. The detection portion 63 is arranged at a position opposite to the detected portion 64. As an example, the diameter of the detected portion 64 is larger than the diameter of the motor shaft member 13.

[0044] As an example of the rotation angle sensor 62, the detected part 64 includes a magnet. For example, the detected part 64 includes a bracket to which the magnet is mounted. In this case, the magnet is mounted on the motor shaft member 13 via the bracket. As an example, the detection part 63 is a sensor element that detects a change in the magnetic field of a magnet that rotates integrally with the motor shaft member 13.

[0045] <Partition wall>

[0046] like Figure 1 as well as Figure 2 As shown in FIG. 1 , a through hole 71 t is formed in the partition wall 70. The through hole 71 t is a hole for arranging at least a part of the rotation angle sensor 62 therein. Figure 1 as well as Figure 2 2 shows an example in which the detected portion 64 of the rotation angle sensor 62 is disposed in the through hole 71t. The detecting portion 63 of the rotation angle sensor 62 may be disposed in the through hole 71t. The detected portion 64 and the detecting portion 63 may be disposed in the through hole 71t.

[0047] The through hole 71t connects the first housing portion 18 and the second housing portion 19. In other words, a path connecting the first housing portion 18 and the second housing portion 19 is formed by a gap between the detected portion 64 and the partition wall 70 forming the through hole 71t.

[0048] The diameter of the through hole 71t is preferably slightly larger than the diameter of the detected portion 64 to reduce the gap between the detected portion 64 disposed in the through hole 71t and the partition wall 70 forming the through hole 71t. That is, the cross-sectional area of ​​the path connecting the first housing portion 18 and the second housing portion 19 is preferably small.

[0049] For example, the center of the through hole 71 t is located on the input axis C1 .

[0050] For example, the through hole 71 t is formed with a constant diameter from the surface of the partition wall 70 facing the first housing portion 18 to the surface of the partition wall 70 facing the second housing portion 19 .

[0051] An example of the partition wall 70 has magnetic permeability that allows magnetic flux to pass through. An example of the partition wall 70 is formed of a non-magnetic material. Examples of the non-magnetic material include synthetic resin materials and aluminum alloys.

[0052] In the electric brake device 10, it is preferable to align the partition wall 70 so that the detected portion 64 is disposed in the through hole 71t. For example, the motor bracket 81 and the partition wall 70 may be fixed by pins. The present invention is not limited thereto, and the partition wall 70, the motor bracket 81, the housing 11a, and the cover 11b, which are in contact with each other, may be fixed by pins or the like.

[0053] <Method for manufacturing electric brake device>

[0054] In the method for manufacturing the electric brake device 10 , first, a step of mounting the detected portion 64 on the motor shaft member 13 of the electric motor 12 is performed. Next, a step of mounting the electric motor 12 on the housing 11 a is performed. Next, a step of mounting the partition wall 70 is performed.

[0055] An example of a method for manufacturing the electric brake device 10 is specifically described. First, a process of mounting the electric motor 12 on the motor bracket 81 is performed. Next, a process of mounting the ratchet gear 51, the input gear 31, and the detected portion 64 on the motor shaft member 13 is performed. Next, a process of mounting the rotation stop mechanism 50 on the motor bracket 81 is performed. After the above processes, the parking brake unit 80 in which the electric motor 12, the rotation stop mechanism 50, and the motor bracket 81 are integrated is assembled. Next, a process of mounting the parking brake unit 80 in which the electric motor 12, the rotation stop mechanism 50, and the motor bracket 81 are integrated to the housing 11a is performed. For example, the parking brake unit 80 is mounted on the housing 11a by inserting the electric motor 12 into the opening of the housing 11a from the end face of the electric motor 12 on the opposite side to the end face protruding from the motor shaft member 13. Then, after the transmission mechanism 30, the partition wall 70, and the circuit unit 60 are mounted to the housing 11a, the cover 11b is mounted to the housing 11a to block the opening of the housing 11a. At this time, the partition wall 70 is mounted so that the detected portion 64 mounted on the motor shaft member 13 is inserted into the through hole 71t. In addition, by inserting the intermediate shaft member 38 in the transmission mechanism 30 into the transmission shaft hole 86, the intermediate shaft member 38 can be supported by the motor bracket 81.

[0056] <Functions and Effects of First Embodiment>

[0057] The operation and effects of the first embodiment will be described.

[0058] According to the electric brake device 10, the partition wall 70 can prevent foreign matter from entering the second housing portion 19 from the first housing portion 18 housing the transmission mechanism 30 that may be a source of foreign matter such as wear powder and lubricant. Thus, the circuit unit 60 housed in the second housing portion 19 can be protected from foreign matter.

[0059] In the electric brake device 10, the detected portion 64 is arranged in the through hole 71t formed in the partition wall 70. Thus, even if the partition wall 70 is arranged in the housing 11a to divide the first housing portion 18 for housing the transmission mechanism 30 and the second housing portion 19 for housing the circuit portion 60, the detected portion 64 and the detecting portion 63 can be arranged close to each other. Therefore, even if the partition wall 70 is arranged, the detecting portion 63 can be arranged at a position with a relatively high magnetic flux density. Thus, while reducing the decrease in the detection accuracy of the rotation angle sensor 62, it is possible to suppress the intrusion of foreign matter such as wear powder and lubricant into the second housing portion 19.

[0060] In the electric brake device 10, the cross-sectional area of ​​the path connecting the first housing portion 18 and the second housing portion 19 is reduced by reducing the gap between the partition wall 70 and the detected portion 64 disposed in the through hole 71t. Thus, although the through hole 71t is formed in the partition wall 70, foreign matter is less likely to pass through the through hole 71t.

[0061] (Second Embodiment)

[0062] Figure 3 An electric brake device 110 according to a second embodiment is shown.

[0063] The electric brake device 110 of the second embodiment differs from the electric brake device 10 of the first embodiment in that the motor shaft member 13 is disposed in the through hole 171t. The same components as those of the electric brake device 10 are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted as appropriate.

[0064] like Figure 3 As shown, the motor shaft member 13 is inserted into the through hole 171t of the partition wall 170. The diameter of the through hole 171t may be slightly larger than the diameter of the motor shaft member 13.

[0065] Since the motor shaft member 13 is arranged in the through hole 171 t , in the electric brake device 110 , the detected portion 64 is arranged in the second housing portion 19 .

[0066] In the method for manufacturing the electric brake device 110 , first, a step of mounting the electric motor 12 on the housing 11 a is performed. Next, a step of mounting the partition wall 170 is performed. Next, a step of mounting the detected portion 64 on the motor shaft member 13 of the electric motor 12 is performed.

[0067] <Functions and Effects of Second Embodiment>

[0068] According to the electric brake device 110 of the second embodiment, the same operation and effects as those of the electric brake device 10 of the first embodiment are achieved.

[0069] The electric brake device 110 also exhibits the following actions and effects.

[0070] In the electric brake device 110, the partition wall 170 only needs to form the through hole 171t having a diameter larger than that of the motor shaft member 13. Therefore, the diameter of the through hole 171t can be reduced compared with the through hole 71t provided in the first embodiment. As a result, foreign matter is less likely to pass through the through hole 171t.

[0071] In the electric brake device 110, the detected portion 64 is arranged in the second housing portion 19 that houses the circuit portion 60. Therefore, the detected portion 64 and the detecting portion 63 can be arranged closer to each other.

[0072] (Change Example)

[0073] The above-mentioned embodiments can be implemented with modifications as follows. The above-mentioned embodiments and the following modifications can be implemented in combination with each other within the scope of no technical contradiction.

[0074] [Shape of partition wall having through hole]

[0075] In the first embodiment described above, the through hole 71t having a constant diameter is exemplified, but the through hole formed in the partition wall is not limited to this.

[0076] exist Figure 4 The partition wall 270 shown is formed with a through hole 271t. The through hole 271t is formed so as to gradually reduce in diameter from the surface of the partition wall 270 facing the first receiving portion 18 to the surface of the partition wall 270 facing the second receiving portion 19. That is, the through hole 271t is a tapered shape that gradually becomes thinner from the first receiving portion 18 to the second receiving portion 19. The diameter of the smallest diameter portion of the through hole 271t is slightly larger than the diameter of the detected portion 64. Figure 4 The structure shown can achieve the effect that foreign matter that has entered the through hole 271 t from the first housing portion 18 is rebounded and returned to the first housing portion 18 due to the tapered shape.

[0077] ·exist Figure 5The partition wall 370 shown is formed with a through hole 371t. The through hole 371t has a constant diameter similar to the through hole 71t of the first embodiment. The partition wall 370 gradually becomes thicker as the edge approaches the through hole 371t. That is, the partition wall 370 has an inclined surface 372 that is inclined so that the edge approaches the electric motor 12 as it approaches the through hole 371t. Figure 5 In the structure shown, foreign matter moving from the first receiving portion 18 toward the through hole 371 t hits the inclined surface 372 , so that it is difficult for the foreign matter to enter the through hole 371 t .

[0078] ·exist Figure 6 The partition wall 470 shown in the figure is formed with a through hole 471t. The through hole 471t is similar to the first housing portion 18 in that it is tapered gradually from the first housing portion 18 toward the second housing portion 19. Figure 4 The through hole 271t is the same as the through hole 471t shown in the example. The diameter of the smallest diameter portion of the through hole 471t is smaller than the diameter of the detected portion 64. The detected portion 64 is staggered and arranged closer to the electric motor 12 compared to the first embodiment. As a result, a portion of the partition wall 470 overlaps with the detected portion 64 in the direction in which the axis of the motor shaft member 13 extends. Figure 6 In the structure shown, it is more difficult for foreign matter from the first receiving portion 18 toward the second receiving portion 19 to pass through the through hole 471t.

[0079] ·exist Figure 7 The partition wall 570 shown is formed with a through hole 571t. The partition wall 570 has a reduced diameter portion 573 extending from the edge of the through hole 571t toward the center of the through hole 571t on the surface facing the second housing portion 19. The diameter of the through hole 571t in the partition wall 570 from the surface facing the first housing portion 18 to the reduced diameter portion 573 is constant. A hole having a diameter smaller than the diameter is formed in the reduced diameter portion 573. The surface of the reduced diameter portion 573 facing the input shaft C1 may also be tapered. Figure 7 In the structure shown, the path connecting the first receiving portion 18 and the second receiving portion 19 formed by the gap between the detected portion 64 and the partition wall 570 forming the through hole 571t is bent. More specifically, the above-mentioned path is bent from the direction in which the axis of the motor shaft member 13 extends to the radial direction of the through hole 571t. In addition, by providing the reduced diameter portion 573, the reduced diameter portion 573 as a part of the partition wall 570 overlaps with the detected portion 64 in the direction in which the axis of the motor shaft member 13 extends. Figure 7 In the structure shown, it is more difficult for foreign matter to pass through the through hole 571t from the first receiving portion 18 toward the second receiving portion 19.

[0080] The partition wall formed so as to bend the path is not limited to Figure 7 The illustrated configuration only requires that the member disposed in the through hole and the partition wall be configured so that at least one of the paths is bent.

[0081] [Installation of components into through-holes]

[0082] ·like Figure 8 As shown, a bearing 77 may be provided and fixed to the partition wall 670 in a manner arranged in the through hole 671t. Examples of the bearing 77 include rolling bearings, sliding bearings, and the like. The bearing 77 supports the detected portion 64 in a rotatable manner. In this case, the detected portion 64 corresponds to the supported portion. The through hole 671t is blocked by the bearing 77 and the detected portion 64 supported by the bearing 77. Figure 8 The structure shown can further suppress the intrusion of foreign matter from the first housing portion 18 into the second housing portion 19 .

[0083] A bearing may be applied to the through hole 171t in the second embodiment. That is, the bearing may support the motor shaft member 13 in a rotatable manner. In this case, the motor shaft member 13 corresponds to the supported portion. In this way, the bearing only needs to use at least a portion of the detection portion 64 and a portion of the motor shaft member 13 disposed in the hole as the supported portion and support the supported portion in a rotatable manner.

[0084] The partition wall may include a bearing that supports the detection portion 64 disposed in the through hole, and a bearing that supports the motor shaft member 13 disposed in the through hole.

[0085] ·like Fig. 9 as well as Fig.10 As shown in FIG. 7 , a gasket 79 that fits into the through hole 771 t may be provided. The through hole 771 t is formed in the partition wall 770 .

[0086] The gasket 79 as an example is elastically deformable. The gasket 79 is made of rubber, for example. The gasket 79 in the state of being embedded in the through hole 771t is described. The gasket 79 has an edge portion 79a embedded in the through hole 771t. The gasket 79 has a cover portion 79b extending from the edge portion 79a toward the center of the through hole 771t on the surface facing the second housing portion 19. The thickness of the cover portion 79b is thinner than the thickness of the edge portion 79a. The thickness of the cover portion 79b is thinner than the thickness of the partition wall 770. A center hole 79c is formed in the cover portion 79b. The diameter of the center hole 79c is smaller than the diameter of the detected portion 64. The diameter of the center hole 79c is larger than the diameter of the motor shaft member 13. A radial slit 79d may also be formed in the cover portion 79b from the center hole 79c toward the edge portion 79a. The shape of the slit 79d, such as the width and length, is not particularly limited. In addition, an arbitrary number of slits 79d can be formed in the cover portion 79b.

[0087] exist Fig. 9 In the example shown, the motor shaft member 13 is disposed in the through hole 771t. More specifically, the motor shaft member 13 is inserted into the center hole 79c of the washer 79 fitted into the through hole 771t.

[0088] right Fig. 9 The manufacturing method of the illustrated electric brake device is described. First, a process of mounting the detected portion 64 on the motor shaft member 13 of the electric motor 12 is performed. Next, a process of mounting the electric motor 12 on the housing 11a is performed. Next, a process of mounting the partition wall 770 is performed. Here, the cover portion 79b is elastically deformed so that the detected portion 64 can pass through the center hole 79c of the washer 79.

[0089] According to the above configuration, since the gasket 79 includes the cover portion 79b and the center hole 79c, it is possible to reduce the cross-sectional area of ​​the path connecting the first housing portion 18 and the second housing portion 19. Since the cover portion 79b is elastically deformed, even if the motor shaft member 13 is arranged in the through hole 771t, the partition wall 70 can be installed after the detected portion 64 is mounted on the motor shaft member 13. By forming the slit 79d in the cover portion 79b, it is easier to pass the detected portion 64 through the center hole 79c than when the slit 79d is not formed.

[0090] ·like Fig.11 As shown, the film 78 may be installed in a manner to block the through hole 871t. The through hole 871t is formed in the partition wall 870. The thickness of the film 78 is thinner than the thickness of the partition wall 870. The film 78 has magnetic permeability. The film 78 is made of resin, for example. Fig.11 In the example shown, the film 78 is attached to the surface of the partition wall 870 that faces the second housing portion 19 .

[0091] According to the above configuration, similar to the first embodiment, even if the partition wall 70 is disposed, the detected portion 64 and the detecting portion 63 can be easily disposed close to each other. Furthermore, since the through hole 871t is blocked by the film 78, the intrusion of foreign matter into the second housing portion 19 can be further suppressed.

[0092] ·like Fig.12 As shown, the film 78 for blocking the through hole 871t may also be installed on the inner wall of the through hole 871t. For example, the film 78 may also be pressed into the through hole 871t.

[0093] In addition, for example, it is also possible to replace Fig. 9 as well as Fig.10 The gasket 79 shown in the example is inserted into the through hole 871t without the center hole 79c and the slit 79d. Fig.12 That is, the through hole 871t may be blocked by a cover portion of a gasket instead of the film 78.

[0094] [Partition wall with non-through hole]

[0095] In the first and second embodiments described above, through holes are exemplified as the holes formed in the partition walls. The holes formed in the partition walls are not limited to through holes, and may be non-through holes. Fig.13 An example will be described.

[0096] Fig.13 An example is shown in which a non-through hole 71n is formed in the partition wall 970, the surface facing the first housing portion 18 being recessed from the surface facing the second housing portion 19. That is, the thickness of the partition wall 970 is reduced in the portion where the non-through hole 71n is formed. The detected portion 64 can be arranged in the non-through hole 71n. Thus, the detection portion 63 and the detected portion 64 can be arranged side by side in the direction in which the axis of the motor shaft member 13 extends.

[0097] According to the above configuration, similar to the first embodiment, even if the partition wall 970 is arranged, the detected portion 64 and the detecting portion 63 can be easily arranged close to each other. Furthermore, since the hole where the detected portion 64 is arranged is a non-through hole 71n, the intrusion of foreign matter into the second housing portion 19 can be further suppressed.

[0098] · Fig.14 Other examples of non-through holes are shown. Fig.14 An example is shown in which a non-through hole 171n is formed in the partition wall 1070, the surface facing the second housing portion 19 and the surface facing the first housing portion 18 being recessed. The detection portion 63 can be arranged in the non-through hole 171n.

[0099] ·Can also Fig.13 A bearing is mounted in the non-through hole 71 n as shown in the example. The bearing can support the detection portion 64 .

[0100] ·Can also be formed on the partition wall Fig.13 The non-through holes and Fig.14 That is, the partition wall may be provided with a non-through hole whose surface facing the first receiving portion 18 is recessed toward the surface facing the second receiving portion 19, and a non-through hole whose surface facing the second receiving portion 19 is recessed toward the surface facing the first receiving portion 18. According to this configuration, the thickness of the partition wall where the non-through hole is formed can be made thinner.

[0101] · A through hole that is a combination of a non-through hole and a through hole may be formed in the partition wall. Fig.13 The bottom of the non-through hole as exemplified above forms a through hole having a smaller diameter than the diameter of the non-through hole. Figure 7 In other words, the structure shown as an example is a structure including holes that are a combination of non-through holes and through holes.

[0102] [Rotation angle sensor configuration]

[0103] In the first and second embodiments, the detection portion 63 of the rotation angle sensor 62 is arranged at a position opposite to the detected portion 64. Here, in this specification, the detection portion 63 and the detected portion 64 are opposite to each other, which means that the detection portion 63 and the detected portion 64 are arranged side by side in the direction in which the axis of the motor shaft member 13 extends. That is, other components such as non-magnetic bodies may be arranged between the detection portion 63 and the detected portion 64. For example, Fig.11 as well as Fig.12 As in the structure shown in the example, a member for blocking the through hole may also be provided. Fig.13 as well as Fig.14 As in the illustrated configuration, the detection portion 63 and the detected portion 64 may be arranged so as to sandwich a thin portion of the partition wall.

[0104] [Positional Relationship Between Motor Shaft Member and Detected Part]

[0105] In the first and second embodiments described above, the structure in which the detected portion 64 is mounted on the end of the motor shaft member 13 is exemplified. This is not limited to this, and the detected portion may be mounted on the motor shaft member in a manner that the motor shaft member penetrates the detected portion. That is, it is not a necessary structure to mount the detected portion on the end of the motor shaft member. It is sufficient as long as the detected portion is mounted on the end of the motor shaft member.

[0106] In addition, a gear such as an input gear may be installed at the end of the motor shaft member, and the detected part may be installed at the end of the gear on the side opposite to the motor shaft member. That is, it is not necessary to directly install the detected part on the motor shaft member. A member may be provided between the detected part and the motor shaft member.

[0107] [Relationship between the rotation angle sensor and the motor shaft member and the hole]

[0108] "At least one of at least a portion of the rotation angle sensor and a portion of the motor shaft member is disposed in the hole" means the following structure. The result of "at least a portion of the rotation angle sensor is disposed in the hole", the structure of "a portion of the motor shaft member is disposed in the hole", or the structure of "at least a portion of the rotation angle sensor and a portion of the motor shaft member are both disposed in the hole".

[0109] In addition, “the portion of the rotation angle sensor and the motor shaft member arranged in the through hole” is referred to as an insertion portion.

[0110] In addition, the expression "at least a part of the rotation angle sensor" refers to only the detected part, only the detecting part, or both the detected part and the detecting part. In this case, the "detected part" may be the entirety of the detected part or a part of the detected part. The "detecting part" may be the entirety of the detecting part or a part of the detecting part.

[0111] According to the combination of the above options, the electric brake device can be configured as follows.

[0112] The entire detection portion is arranged in the through hole. A portion of the detection portion is arranged in the through hole. An example of such a structure is the first embodiment described above.

[0113] The entire detection unit is arranged in the through hole. A portion of the detection unit is arranged in the through hole.

[0114] The motor shaft member is disposed in the through hole. An example of this configuration is the second embodiment described above.

[0115] The detected portion and the motor shaft member are disposed in the through hole. For example, when the thickness of the partition wall is thicker than the thickness of the detected portion, the above-mentioned configuration can be adopted.

[0116] The detection part and the motor shaft member are arranged in the through hole. For example, when the motor shaft member passes through the detected part, it can be configured as described above.

[0117] The entire detection part is arranged in a non-through hole. A part of the detection part is arranged in a non-through hole. An example of such a structure is Fig.13 Examples of changes shown.

[0118] The entire detection unit is configured in a non-through hole. A part of the detection unit is configured in a non-through hole. An example of such a structure is Fig.14 Examples of changes shown.

[0119] The detected portion and the motor shaft member are arranged in the non-through hole. For example, when the depth of the non-through hole is greater than the thickness of the detected portion, the above-mentioned configuration can be adopted.

[0120] The motor shaft member is disposed in the non-through hole. The detection portion and the motor shaft member are disposed in the non-through hole. For example, when the motor shaft member passes through the detected portion, the above-described configuration can be employed.

Claims

1. An electric brake device, comprising: a transmission mechanism that transmits the rotation of a motor shaft member of the electric motor; an actuator unit that moves the friction member according to the rotation of the electric motor transmitted through the transmission mechanism, and applies a braking force to the wheel by pressing the friction member against a rotating body that rotates integrally with the wheel; A circuit unit, controlling the actuator unit; The rotation angle sensor is composed of a detected portion mounted on the motor shaft member and a detection portion for detecting an output from the detected portion, and detects the rotation angle of the electric motor, wherein: The detection unit is disposed in the circuit unit; and The partition wall divides a first space and a second space, wherein the first space is a space for arranging the transmission mechanism, and the second space is a space for arranging the circuit unit. The partition wall is provided with a hole, wherein the hole is a through hole or a non-through hole, At least one of at least a portion of the rotation angle sensor and a portion of the motor shaft member is disposed in the hole.

2. The electric brake device according to claim 1, wherein: The hole is the through hole, and the rotation angle sensor and the motor shaft member are configured as an insertion portion in the through hole. The gap between the insertion portion and the partition wall having the through hole forms a path connecting the first space and the second space. The insertion portion and the partition wall are configured so that at least one portion of the path is bent.

3. The electric brake device according to claim 1, wherein: A bearing is provided on the partition wall and rotatably supports a portion of at least one of the detected portion and the motor shaft member disposed in the hole.

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