Electric brake device

Abstract

An electric brake device (10) is provided with a transmission mechanism (30) having an input gear (31) to which the rotation of a motor shaft member (13) is input, and an output gear (33) configured so as to be rotatable in accordance with the rotation of the input gear (31) and to transmit the rotation to an actuator unit. An electric brake device (10) is provided with a circuit unit (60) comprising a circuit board (61) and mounting members (62, 63) mounted on the circuit board (61). In an electric brake device (10), a circuit board (61) and an electric motor (12) are disposed such that a virtual plane parallel to the circuit board (61) intersects the axial direction of a motor shaft member (13). In an electric brake device (10), an output gear is disposed so as to intersect a specific plane (P2) that passes through a circuit unit (60) among virtual planes parallel to a circuit board (61).

Description

Technical Field

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

[0002] Patent document 1 discloses an electric brake device having an electric motor, a piston for pressing a friction material against a rotating body, and a direct motion conversion mechanism for converting the rotation of the electric motor into a linear motion of the piston. The electric brake device has an ECU composed of an ECU cover mounted outside a housing and an ECU substrate accommodated between the housing and the ECU cover. The ECU is arranged at a position orthogonal to an axis extending along the rotating shaft of the electric motor.

[0003] Patent Document 1: Korean Patent Publication No. 10-2021-0004895

[0004] In the electric brake device in which the ECU is mounted outside the housing as disclosed in Patent Document 1, there is a problem that the electric brake device increases the amount of the ECU cover in the direction in which the rotation axis of the electric motor extends. Summary of the invention

[0005] The main purpose of the electric brake device for solving the above-mentioned problems is to include: an electric motor that rotates a motor shaft component; an actuator unit that can move a friction material according to the rotation of the motor shaft component in the electric motor, and generate a braking force on the wheel by pressing the friction material to a rotating body that rotates integrally with the wheel of the vehicle; a transmission mechanism that transmits the rotational motion of the motor shaft component to the actuator unit, the transmission mechanism having an input gear and an output gear, wherein the input gear inputs the rotation of the motor shaft component, and the output gear is configured to rotate according to the rotation of the input gear and transmit the rotation to the actuator unit; and a circuit unit that controls the electric motor, the circuit unit being configured to have a circuit substrate and a mounting component mounted on the circuit substrate, the circuit substrate and the electric motor being configured so that a virtual plane parallel to the circuit substrate intersects with the axial direction of the motor shaft component, and the output gear being configured to intersect with a specific plane, which is a plane in the virtual plane that passes through the circuit unit.

[0006] According to the above configuration, the output gear is arranged to intersect with a specific plane passing through the circuit unit in a virtual plane parallel to the circuit substrate, so that the output gear and the circuit unit overlap in the axial direction of the motor shaft member intersecting with the virtual plane. Due to this overlap, the size of the electric brake device in the axial direction of the motor shaft member is not easily increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a partial cross-sectional view showing one embodiment of the electric brake device.

[0008] Figure 2 : is a schematic diagram showing the electric brake device.

[0009] Figure 3 It is a schematic diagram showing an electric brake device according to a modified example.

[0010] Figure 4 It is a schematic diagram showing an electric brake device according to another modified example.

[0011] Figure 5 It is a schematic diagram showing an electric brake device according to another modified example.

[0012] Figure 6 It is a schematic diagram showing an electric brake device according to another modified example. DETAILED DESCRIPTION

[0013] Below, refer to Figure 1-2 An electric brake device 10 as one embodiment of the electric brake device will be described.

[0014] <Electric brake device>

[0015] The electric brake device 10 includes an electric motor 12 that rotates a motor shaft member 13. The electric brake device 10 includes an actuator unit 20 that can move a friction material 22 according to the rotation of the motor shaft member 13 in the electric motor 12, and generate a braking force on the wheel by pressing the friction material 22 against a rotating body 21 that rotates integrally with the wheel of the vehicle. The electric brake device 10 includes a transmission mechanism 30 that transmits the rotational motion of the motor shaft member 13 to the actuator unit 20. The transmission mechanism 30 includes an input gear 31 that inputs the rotation of the motor shaft member 13, and an output gear 33 that is configured to rotate according to the rotation of the input gear 31 and transmit the rotation to the actuator unit 20. The electric brake device 10 includes a circuit unit 60 that controls the electric motor 12, and the circuit unit is configured to include a circuit substrate 61 and a mounting member mounted on the circuit substrate 61.

[0016] In the electric brake device 10, the circuit substrate 61 and the electric motor 12 are arranged so that a virtual plane parallel to the circuit substrate 61 intersects the axial direction of the motor shaft member 13. In the electric brake device 10, the output gear is arranged so as to intersect with a specific plane P2 which is a plane passing through the circuit portion 60 in the virtual plane parallel to the circuit substrate 61.

[0017] Figure 1 The electric brake device 10 is shown. The electric brake device 10 includes a housing 11 . The electric brake device 10 includes an actuator unit 20 .

[0018] The actuator unit 20 includes a friction material 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 greater the force with which the actuator unit 20 presses the friction material 22 against the rotating body 21, the greater the braking force that can be generated.

[0019] The electric brake device 10 includes an electric motor 12. Figure 1 The line along the axis of the motor shaft 13 of the electric motor 12 is shown as the rotation axis C1. The direction in which the rotation axis C1 extends coincides with the axial direction of the motor shaft 13. That is, the axial direction of the motor shaft 13 refers to two directions extending along the axis of the motor shaft 13.

[0020] 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 threaded shaft and a nut. The actuator unit 20 includes a piston 41 on which a friction material 22 is mounted at the end facing the rotating body 21. The actuator unit 20 moves the piston 41, that is, the friction material 22, by using the conversion mechanism 40 to convert the rotational motion of the electric motor 12 into a linear motion. One of the directions in which the piston 41 is moved by the linear motion is a direction in which the friction material 22 mounted on the piston 41 approaches 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 material 22 mounted on the piston 41 moves away from the rotating body 21.

[0021] 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.

[0022] like Figure 1 As shown, the transmission mechanism 30 is composed of a combination of gears and the like. The transmission mechanism 30 includes an input gear 31. The input gear 31 is mounted on 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.

[0023] 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 32a that can mesh with the input gear 31 and a second gear portion 32b that can mesh with the output gear 33. In the intermediate gear 32, the first gear portion 32a and the second gear portion 32b rotate integrally. In an example of the intermediate gear 32, as shown in FIG. Figure 1As shown, the first gear portion 32a and the second gear portion 32b are integrally formed. For example, the transmission mechanism 30 may also include a first intermediate gear corresponding to the first gear portion 32a that can mesh with the input gear 31, and a second intermediate gear corresponding to the second gear portion 32b that can mesh with the output gear 33. A plurality of intermediate gears may be mounted on the intermediate shaft member 38.

[0024] 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 input gear 31 is meshed with the first gear portion 32a of the intermediate gear 32, so that the rotational motion of the electric motor 12 can be transmitted from the motor shaft member 13 to the intermediate shaft member 38. The second gear portion 32b of the intermediate gear 32 is meshed with the output gear 33, so that the rotational motion of the electric motor 12 can be transmitted from the intermediate shaft member 38 to the output shaft member 39. 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. Figure 1 In FIG. 1 , a line along the axis of the output shaft member 39 is shown as the output shaft C2 .

[0025] In addition, although Figure 1 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 .

[0026] like Figure 1 As shown, the electric brake device 10 may include a braking force maintaining mechanism 50. The braking force maintaining mechanism 50 can maintain the braking force applied by the actuator unit 20. For example, the braking force maintaining mechanism 50 functions as a ratchet mechanism.

[0027] An example of the braking force maintaining mechanism 50 is described. The braking force maintaining mechanism 50 includes 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 independently of the input gear 31. The braking force maintaining mechanism 50 includes an engaging portion 52 and an actuator 53. The engaging portion 52 has a claw shape that meshes with the teeth of the ratchet gear 51. The actuator 53 can mesh the engaging portion 52 with the ratchet gear 51. The braking force maintaining mechanism 50 can stop the ratchet gear 51 from rotating by meshing the engaging portion 52 with the ratchet gear 51. The braking force maintaining mechanism 50 can maintain the braking force by stopping the ratchet gear 51 from rotating. The braking force maintaining mechanism 50 can release the maintenance of the braking force by eliminating the meshing of the engaging portion 52 with the ratchet gear 51.

[0028] The electric brake device 10 includes a circuit unit 60. The circuit unit 60 has a processing circuit for controlling the rotational motion of the electric motor 12. The circuit unit 60 includes a circuit substrate 61 and a mounting component mounted on the circuit substrate 61. For example, the circuit unit 60 is accommodated in the housing 11. Figure 1 2 shows an example in which the circuit unit 60 is mounted so that the rotation 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 rotation axis C1 and the circuit board 61 are orthogonal.

[0029] The electric brake device 10 may include a heat conducting member for dissipating heat from the circuit unit 60. For example, the heat conducting member may be mounted between the circuit board 61 and the housing 11 in a state of being in contact with the circuit unit 60 and the housing 11.

[0030] <Circuit Department>

[0031] exist Figure 1 6 shows a small mounting component 62 as a mounting component provided in the circuit unit 60. The small mounting component 62 is a component that is relatively low from the surface of the circuit substrate 61. Figure 1 As shown in FIG. 1 , the circuit unit 60 may include a large mounting component 63 as a mounting component. The large mounting component 63 is a component that is relatively high from the surface of the circuit board 61 .

[0032] The mounted components of the circuit section 60 may be mounted on one side or the other side of the circuit substrate 61. Figure 1 2 shows an example in which a small mounting component 62 and a large mounting component 63 are mounted on one side of a circuit board 61 facing the electric motor 12 .

[0033] Examples of the large mounted component 63 include a connector, a heat sink, a capacitor, etc. Specific examples of the connector include a base, a socket, a plug, and the like.

[0034] The small mounting component 62 is, for example, a sensor portion of a rotation angle sensor for detecting the rotation angle of the motor shaft component 13. Figure 1 2 shows an example in which the magnet 14, which is the detected part constituting the rotation angle sensor, is mounted on the motor shaft member 13. In this case, the small mounting member 62 is as shown in FIG. Figure 1 As shown, it is arranged at a position facing the magnet 14. In addition, as the small mounted component 62, for example, a chip resistor, a surface mounted integrated circuit, etc. can be cited.

[0035] <Transmission mechanism>

[0036] The transmission mechanism 30 included in the electric brake device 10 will be described in more detail.

[0037] like Figure 1 As shown, the input gear 31, the intermediate gear 32 and the output gear 33 are cylindrical gears. The motor shaft member 13, the intermediate shaft member 38 and the output shaft member 39 are arranged so that the axes of the motor shaft member 13, the intermediate shaft member 38 and the output shaft member 39 are parallel.

[0038] like Figure 1 As shown, the intermediate gear 32 is installed so that the second gear portion 32b is located at a position farther from the electric motor 12 than the first gear portion 32a in the axial direction of the intermediate shaft member 38. That is, the output gear 33 is installed at a position farther from the electric motor 12 than the input gear 31 in the axial direction of the motor shaft member 13. In other words, the gears provided in the transmission mechanism 30 are meshed and arranged in such a manner that the input gear 31 and the output gear 33 are arranged in order from near to far from the electric motor 12 in the axial direction of the motor shaft member 13.

[0039] like Figure 1 As shown, in the axial direction of the motor shaft member 13, a housing portion 19 is provided in the housing 11 in the direction opposite to the input gear 31 and the electric motor 12 for accommodating the circuit portion 60. The housing portion 19 is provided in the housing 11 in the direction approaching the electric motor 12 from the conversion mechanism 40 relative to the output gear 33.

[0040] <Circuit Configuration>

[0041] use Figure 1 as well as Figure 2 , the positional relationship among the circuit unit 60, the transmission mechanism 30, and the electric motor 12 will be described in detail. Figure 2 The electric brake device 10 is schematically shown. Figure 2 In FIG. 1 , the configuration of the transmission mechanism 30 other than the input gear 31 and the output gear 33 is omitted from illustration.

[0042] exist Figure 2 A two-dot chain line representing a virtual plane P1 is shown in FIG. The virtual plane P1 is a virtual plane parallel to the circuit substrate 61 and intersecting with the motor shaft member 13. Figure 2 In FIG. 1 , one of the virtual planes parallel to the circuit board 61 and intersecting the motor shaft member 13 is exemplified as the virtual plane P1 .

[0043] exist Figure 2, a two-dot chain line indicating a specific plane P2 is shown in FIG. The specific plane P2 is a virtual plane parallel to the circuit substrate 61 and is a virtual plane passing through the circuit portion 60. For example, the specific plane P2 is a virtual plane that passes through the mounting components in the circuit portion 60 instead of the circuit substrate 61. An example of the specific plane P2 is a virtual plane that passes through the large mounting components 63 in the circuit portion 60. As the specific plane P2, a virtual plane that passes through the small mounting components 62 in the circuit portion 60 may also be used.

[0044] The positional relationship between the circuit unit 60 and the output gear 33 will be described.

[0045] In the electric brake device 10, the output gear 33 is arranged to intersect with the specific plane P2. In other words, the mounting member and the output gear 33 are arranged on the specific plane P2. For example, the output gear 33 is arranged so that the surface of the output gear 33 that is orthogonal to the axis of the output shaft member 39 is parallel to the circuit substrate 61. In this case, Figure 2 As shown, the output shaft C2 is orthogonal to the specific plane P2. In this case, the output gear 33 can be arranged so that the surface of the output gear 33 that is orthogonal to the axis of the output shaft member 39 is located on the specific plane P2.

[0046] The output gear 33 does not face the circuit unit 60 in the direction in which the output shaft C2 extends. That is, the circuit board 61 included in the electric brake device 10 is sized so that the circuit board 61 and the output gear 33 do not face each other in the direction in which the output shaft C2 extends.

[0047] It is preferable that the output gear 33 does not protrude to a position farther from the electric motor 12 than the circuit board 61 in the direction from the input gear 31 toward the circuit unit 60 in the axial direction of the motor shaft member 13 .

[0048] The positional relationship between the circuit unit 60 and the input gear 31 will be described.

[0049] In the electric brake device 10, the input gear 31 is arranged at a position offset in the axial direction of the motor shaft member 13 with respect to the circuit substrate 61. For example, in the axial direction of the motor shaft member 13, the electric motor 12, the input gear 31, and the circuit substrate 61 are arranged in this order. The input gear 31 is opposite to the circuit unit 60 in the direction in which the rotation axis C1 extends.

[0050] The input gear 31 may be opposite to a mounting component mounted on the circuit substrate 61. Figure 1 as well as Figure 2 In the example shown, the small mounting member 62 mounted on the circuit board 61 faces the input gear 31 in the axial direction of the motor shaft member 13. The input gear 31 may face the circuit board 61.

[0051] In addition, if Figure 1 as well as Figure 2 As shown, the input gear 31 is preferably not opposed to the large mounting member 63 mounted on the circuit board 61 in the axial direction of the motor shaft member 13. In other words, the large mounting member 63 is preferably arranged at a position that does not intersect the rotation axis C1.

[0052] In the electric brake device 10, even when the height of the large mounting component 63 from the surface of the circuit board 61 is changed, the large mounting component 63 can be arranged as follows. That is, even when the size of the large mounting component 63 is changed, the large mounting component 63 can be arranged.

[0053] Regarding the large mounting component 63, it can be said that the end of the large mounting component 63 farthest from the circuit substrate 61 is located on the same plane as a plane passing through a point on the rotation axis C1 and orthogonal to the rotation axis C1. The above point on the rotation axis C1 is, for example, a point between the input gear 31 and the circuit substrate 61. The above point on the rotation axis C1 may be a point between the input gear 31 and the circuit substrate 61 at a position close to the input gear 31, or may be a point between the input gear 31 and the circuit substrate 61 at a position close to the circuit substrate 61. The above point on the rotation axis C1 may be, for example, a point inside the input gear 31. In other words, the large mounting component 63 and the input gear 31 may be opposite to each other in a direction orthogonal to the rotation axis C1. The above point on the rotation axis C1 may be, for example, a point inside the motor shaft component 13. In other words, the large mounting component 63 and the motor shaft component 13 may be opposite to each other in a direction orthogonal to the rotation axis C1. The above point on the rotation axis C1 may be, for example, a point inside the electric motor 12. In other words, the large mounting component 63 and the electric motor 12 may be opposed to each other in the direction orthogonal to the rotation axis C1.

[0054] <Function and Effect>

[0055] The operation and effects of this embodiment will be described.

[0056] In the electric brake device 10, the output gear 33 is arranged to intersect with the specific plane P2, so that the circuit unit 60 and the output gear 33 overlap in the direction perpendicular to the virtual plane parallel to the circuit substrate 61, that is, in the direction of the rotation axis C1. Due to this overlap, the size of the electric brake device 10 in the axial direction of the motor shaft member 13 is not easy to increase. By arranging the output gear 33 to intersect with the specific plane P2, for example, the circuit unit 60 and the output gear 33 are not easily arranged at a position far away from each other in the direction perpendicular to the surface of the circuit substrate 61. Therefore, the circuit unit 60 is not easily arranged at a position far away from the electric motor 12 in the direction perpendicular to the surface of the circuit substrate 61. As a result, the size of the electric brake device 10 in the axial direction of the motor shaft member 13 is not easy to increase.

[0057] In the electric brake device 10, the circuit unit 60 can be housed in the housing 11. Therefore, the electric brake device 10 is less likely to increase in size in the axial direction of the motor shaft member 13, compared with a case where a circuit substrate 61 having a mounting component is housed in a housing or the like that is independent of the housing 11 and is mounted outside the housing 11.

[0058] In the electric brake device 10, the large mounting member 63 disposed on the circuit board 61 facing the electric motor 12 does not face the input gear 31. Thus, the large mounting member 63 can be disposed while reducing the increase in the size of the electric brake device 10 in the axial direction of the motor shaft member 13.

[0059] In the electric brake device 10, the input gear 31 is arranged at a position offset in the axial direction of the motor shaft member 13 with respect to the circuit substrate 61. Since the circuit portion 60 and the input gear 31 are opposite to each other in the axial direction of the motor shaft member 13, the input gear 31 is not arranged in the direction in which the surface of the circuit substrate 61 expands. Thus, it is possible to suppress the electric brake device 10 from increasing in the direction in which the surface of the circuit substrate 61 expands. The direction in which the surface of the circuit substrate 61 expands corresponds to a direction orthogonal to the extending direction of the rotation axis C1.

[0060] (Change Example)

[0061] This embodiment can be implemented with modifications as follows. This embodiment and the following modifications can be implemented in combination with each other within the range that there is no technical contradiction.

[0062] In the above embodiment, the electric motor 12, the input gear 31, and the circuit board 61 are arranged in this order in the axial direction of the motor shaft member 13. The positional relationship among the electric motor 12, the input gear 31, and the circuit board 61 is not limited to this. Figure 3 The structure shown.

[0063] Figure 3 The electric brake device 110 is shown. The electric brake device 110 is configured such that an input gear 131, an electric motor 112, and a circuit board 161 are arranged in this order in a direction in which a rotation axis C11, which is a line along the axis of the motor shaft member 113, extends. Figure 3 A small mounted component 162 and a large mounted component 163 mounted on a circuit board 161 are illustrated.

[0064] In such an electric brake device 110, the circuit board 161 and the electric motor 112 are also arranged so that a virtual plane parallel to the circuit board 161 intersects the rotation axis C11. Figure 3 In the figure, a virtual plane P11 intersecting the motor shaft member 113 is shown among virtual planes parallel to the circuit board 161 .

[0065] In the electric brake device 110 , the output gear 133 can also be arranged to intersect with a specific plane P12 which is a virtual plane parallel to the circuit substrate 161 and passes through the circuit unit 160 .

[0066] For example, in Figure 3 The output gear 133 is arranged to intersect the specific plane P12. The surface of the output gear 133 perpendicular to the axis of the output shaft member is arranged parallel to the circuit board 161. The output axis C12, which is a line along the axis of the output shaft member, is perpendicular to the specific plane P12.

[0067] have Figure 3 An example of the transmission mechanism 130 of the input gear 131 and the output gear 133 shown in the figure includes an intermediate gear portion 132 in which a gear meshing with the input gear 131 and a gear meshing with the output gear 133 are connected via a shaft having a length in the axial direction of the motor shaft member 113. Figure 3 As in the illustrated example, the length of the transmission mechanism 130 in the extending direction of the output shaft C12 may be longer than the length of the electric motor 112 .

[0068] In the above embodiment, an example is shown in which a virtual plane parallel to the circuit substrate 61 and passing through the virtual plane of the mounting components is used as the specific plane P2. Figure 3 As shown in the example, a virtual plane parallel to the surface of the circuit substrate 161 and passing through the circuit substrate 161 is used as the specific plane P12. Figure 3As shown, the output gear 133 and the circuit substrate 161 are arranged on the specific plane P12. According to such a configuration, the circuit substrate 161 and the output gear 133 can be arranged side by side on the specific plane P12. Since they can be arranged in this way, the degree of freedom of arranging components other than the circuit substrate and the output gear in the electric brake device can be increased.

[0069] In the above embodiment, if Figure 1 as well as Figure 2 , the output gear 33 and the circuit unit 60 are not opposite to each other in the direction in which the rotation axis C1 extends. The positional relationship between the output gear and the circuit unit is not limited to this. Figure 4 The structure shown.

[0070] Figure 4 An electric brake device 210 is shown. Figure 4 As shown, the output gear 233 of the transmission mechanism 230 may be opposite to the circuit portion 260 in the direction in which the output shaft C22 extends. For example, the output gear 233 may be opposite to the circuit substrate 261 in the direction in which the output shaft C22 extends. That is, the electric brake device 210 may be constructed as follows. The circuit substrate 261 of the electric brake device 210 is expanded compared to the circuit substrate 61 in the electric brake device 10, so that the circuit substrate 261 and the output gear 233 are opposite to each other in the line along the axis of the shaft member of the output gear 233, that is, in the direction in which the output shaft C22 extends. In other words, in the electric brake device 210, the output gear 233 is arranged at a position axially offset relative to the circuit substrate 261 toward the motor shaft member 213. In this modification example, Figure 1 as well as Figure 2 Compared with the above-mentioned embodiment shown in FIG. 1 , the substrate area can be expanded. In addition, a component different from the output gear 233 and the circuit unit 260 may be arranged between the output gear 233 and the circuit unit 260. In addition, regarding this modification, in order to hold the output shaft component in the output gear, a through hole may be provided in the circuit substrate 261, and the output shaft component passing through the through hole may be held by the housing.

[0071] exist Figure 4 In the electric brake device 210 shown in FIG. 1 , the circuit board 261 and the electric motor 212 are also arranged so that a virtual plane parallel to the circuit board 261 intersects the rotation axis C21. Figure 4 3 shows a virtual plane P21 intersecting the motor shaft member 213 among virtual planes parallel to the circuit board 261. The input gear 231 faces the small mounting member 262 in the extending direction of the rotation axis C21.

[0072] In addition, Figure 4In FIG. 2 , a virtual plane parallel to the circuit board 261 and passing through a large mounting component 263 having a height higher than the small mounting component 262 is shown as a specific plane P22. According to such an electric brake device 210, a space for increasing the circuit board 261 can be secured in the housing.

[0073] The transmission mechanism may also include a mechanism in which the axis of the input gear intersects the axis of the output gear. Figure 5 An example will be described.

[0074] Figure 5 FIG. 2 shows an electric brake device 310 having a transmission mechanism 330. The transmission mechanism 330 has a bevel gear composed of an input gear 331 and an output gear 333. That is, in the electric brake device 310, the rotation axis C31 and the output axis C32 intersect. The rotation axis C31 and the output axis C32 may also be as follows: Figure 5 In the electric brake device 310, the positional relationship among the electric motor 312, the input gear 331, and the circuit unit 360 is the same as that of the electric brake device 10 in the above-mentioned embodiment. Figure 5 3 , a small mounted component 362 and a large mounted component 363 mounted on a circuit board 361 are exemplified.

[0075] In such an electric brake device 310, the circuit board 361 and the electric motor 312 are also arranged so that a virtual plane parallel to the circuit board 361 intersects with the rotation axis C31. Figure 5 In the figure, a virtual plane P31 intersecting the motor shaft member 313 is shown among virtual planes parallel to the circuit substrate 361 .

[0076] In the electric brake device 310 , the output gear 333 can also be arranged to intersect with a specific plane P32 which is a virtual plane parallel to the circuit substrate 361 and passes through the circuit unit 360 .

[0077] In the above modification, the transmission mechanism 330 having a bevel gear configured such that the rotation axis C31 and the output axis C32 are orthogonal is illustrated. The transmission mechanism may be configured such that the rotation axis C31 and the output axis C32 are in a twisted position. That is, the transmission mechanism may also include a hypoid gear. The transmission mechanism may also include a mechanism composed of a worm and a worm wheel.

[0078] The transmission mechanism can also be equipped with a planetary gear mechanism. Figure 6 An example will be described.

[0079] Figure 6The electric brake device 410 is shown to include a transmission mechanism 430. The transmission mechanism 430 includes a planetary gear mechanism. Specifically, the transmission mechanism 430 includes an input gear 431 corresponding to the sun gear. The transmission mechanism 430 includes an output gear 433. The output gear 433 corresponds to the planetary gear and the planetary carrier. The transmission mechanism 430 includes a ring gear 432. The ring gear 432 is fixed.

[0080] As an example of a planetary gear mechanism, Figure 6 4 shows a configuration in which the axis of the motor shaft member 413 is coaxial with the axis of the output shaft member connected to the planetary carrier of the output gear 433. That is, the axis of the output shaft member is arranged on the line along the axis of the motor shaft member 413, that is, the rotation axis C41.

[0081] like Figure 6 As shown in FIG. 4 , the electric brake device 410 may include a circuit board 461 having a through hole 461 a formed therein. The transmission mechanism 430 may be inserted into the through hole 461 a.

[0082] In such an electric brake device 410, the circuit board 461 and the electric motor 412 are also arranged so that a virtual plane parallel to the circuit board 461 intersects with the rotation axis C41. Figure 6 In the figure, a virtual plane P41 intersecting the motor shaft member 413 is shown among virtual planes parallel to the circuit substrate 461 .

[0083] In the electric brake device 410 , the output gear 433 can be arranged to intersect with a specific plane P42 which is a virtual plane parallel to the circuit substrate 461 and passes through the circuit portion 460 .

[0084] In addition, Figure 6 In the illustrated configuration, an example is shown in which the mounting member 462 is mounted on the surface of the circuit board 461 which is opposite to the surface facing the electric motor 412 .

[0085] In addition, Figure 6 In the illustrated configuration, the input gear 431 is also disposed on the specific plane P42. That is, the input gear 431, the output gear 433, and the circuit board 461 are disposed so as to intersect the specific plane P42.

[0086] In the above modification, the transmission mechanism 430 is inserted into the through hole 461a formed in the circuit substrate 461. Instead of the circuit substrate 461 having the through hole 461a, a circuit substrate divided into a plurality of parts may be used. For example, all the circuit substrates may be arranged on the same plane. A gap may be provided between adjacent circuit substrates. The transmission mechanism may also be arranged between adjacent circuit substrates.

[0087] As an electric motor, it can also be used Figure 6 A flat motor as shown in the example. An electric motor having the following structure is called a flat motor. The flat motor is flat in the direction along the axis of the motor shaft component. Specifically, the length of the electric motor in the direction along the axis of the motor shaft component is short. On the other hand, the length of the electric motor in the direction orthogonal to the axis of the motor shaft component is long.

[0088] In the above embodiment, the configuration in which the intermediate gear 32 is interposed between the input gear 31 and the output gear 33 is exemplified as the transmission mechanism 30. As the transmission mechanism, a configuration in which the input gear and the output gear directly mesh may be used.

[0089] In the above embodiment, an example is shown in which the circuit unit 60 is arranged in the housing portion 19 in the housing 11. It is not an essential configuration that the circuit unit 60 is arranged in the housing 11.

[0090] In the above embodiment, the input gear 31 and the circuit unit 60 are opposed to each other in the axial direction of the motor shaft member 13. A member other than the input gear 31 and the circuit unit 60 may be disposed between them.

[0091] In the above-mentioned embodiment, the configuration in which the input gear 31 and the circuit unit 60 are opposite to each other in the axial direction of the motor shaft member 13 is illustrated. That is, the configuration in which the input gear 31 is arranged at a position offset in the axial direction of the motor shaft member 13 relative to the circuit substrate 61 is illustrated. It is not necessary for the input gear 31 to be opposite to the circuit unit 60. In addition, it is not necessary for the motor shaft member 13 and the circuit unit 60 to be opposite to each other. As for the positional relationship of the circuit substrate, the electric motor, and the input gear in the electric brake device, it is sufficient as long as the circuit substrate 61 and the electric motor 12 are arranged so that a virtual plane parallel to the circuit substrate 61 intersects with the rotation axis C1.

[0092] In the above embodiment, as an example in which the rotation axis C1 intersects the circuit portion 60, a configuration in which the rotation axis C1 intersects the circuit board 61 at right angles is shown. The rotation axis C1 and the circuit board 61 may intersect obliquely.

Claims

1. An electric brake device, comprising: an electric motor to rotate a motor shaft member; an actuator unit capable of moving the friction material according to the rotation of the motor shaft member in the electric motor and generating a braking force on the wheel by pressing the friction material against a rotating body that rotates integrally with the wheel of the vehicle; A transmission mechanism transmits the rotational motion of the motor shaft member to the actuator unit, the transmission mechanism having an input gear and an output gear, wherein: The input gear inputs the rotation of the motor shaft member, and the output gear is configured to be rotatable according to the rotation of the input gear and transmit the rotation to the actuator unit; and A circuit unit controls the electric motor, the circuit unit comprising a circuit substrate and a mounting component mounted on the circuit substrate, The circuit substrate and the electric motor are arranged so that a virtual plane parallel to the circuit substrate intersects the axial direction of the motor shaft member. The output gear is arranged to intersect with a specific plane, which is a plane passing through the circuit portion among the virtual planes.

2. The electric brake device according to claim 1, wherein: The output gear and the circuit board are arranged so that a surface of the output gear orthogonal to an axial direction of a shaft member of the output gear is parallel to the circuit board.

3. The electric brake device according to claim 2, wherein: The specific plane passes through the mounting component in the circuit section. The output gear is arranged at a position offset in the axial direction of the motor shaft member with respect to the circuit board.

4. The electric brake device according to claim 3, wherein: The circuit board is arranged to face the output gear.

5. The electric brake device according to claim 2, wherein: The specific plane passes through the circuit substrate in the circuit portion.

6. The electric brake device according to any one of claims 2 to 5, wherein: The input gear is arranged at a position offset in the axial direction of the motor shaft member with respect to the circuit board, and the circuit board is arranged to face the input gear.

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