Drive device

Abstract

The purpose of the present invention is to facilitate positioning of two actuators. A drive device (1) is provided with a housing (3), a plurality of motors (2) housed in parallel in the housing (3), and a holder (10) for determining the relative positions of the motors, the motors being attached to the holder.

Description

Technical Field

[0001] The invention relates to a driving device. Background Art

[0002] As described in Patent Document 1, there is known a structure including a motor as an actuator generating an operating driving force. In some cases, two motors in the above example are assembled in parallel on one gear.

[0003] In addition, two actuators such as motors may be assembled in parallel in a certain part.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2018 / 124270 Summary of the invention

[0007] Problems to be solved by the invention

[0008] When two actuators such as motors are assembled in parallel and fixed with screws or the like, it is necessary to align their positions when tightening the screws.

[0009] In such a device, in order to accurately fix two actuators such as motors with screws or the like, a structure is required to improve the accuracy of the assembly position by using a fixture or a positioning pin when fixing with screws. When the parts are small, the space for holding them with a fixture becomes narrow, which makes it difficult. In addition, if a fixture such as a pin is used, the number of parts increases, thereby increasing the cost.

[0010] The present invention has been made in view of the above circumstances, and aims to achieve the following object: to position two actuators with high accuracy.

[0011] Technical means of solving problems

[0012] (1) A driving device according to an embodiment of the present invention comprises:

[0013] case,

[0014] A plurality of motors are housed in the housing with axes parallel to each other, and

[0015] a holder for determining the relative positions of the plurality of motors,

[0016] The plurality of motors are mounted on the retainer,

[0017] Thereby, the above-mentioned problem is solved.

[0018] (2) The driving device of the present invention may be, in the above (1),

[0019] The holder includes a base portion and a plurality of engaging portions provided on the base portion so as to correspond to the plurality of motors, respectively.

[0020] The fitting portion is fitted with a positioning fitting portion provided on the motor.

[0021] (3) The driving device of the present invention may be, in the above (2),

[0022] The positioning engaging portion is a positioning convex portion provided on the motor.

[0023] The fitting portion has a fitting hole in which the positioning protrusion of the motor is fitted into the inner peripheral surface.

[0024] (4) The driving device of the present invention may be, in the above (3),

[0025] In the retainer,

[0026] At least one first fitting portion among the plurality of fitting portions has a first press-in portion, which protrudes radially inward at at least three locations on the inner circumferential surface of the fitting hole and is pressed into a first positioning protrusion of a first motor among the plurality of motors.

[0027] A second fitting portion different from the first fitting portion among the plurality of fitting portions has a second press-fit portion that protrudes radially inward at two locations on the inner circumferential surface of the fitting hole and is press-fitted into a second positioning protrusion of a second motor among the plurality of motors.

[0028] (5) The driving device of the present invention may be, in the above (4),

[0029] In the retainer,

[0030] The first press-fit portions are arranged at equal intervals in the circumferential direction of the first fitting portion.

[0031] The second press-fit portions are arranged at equal intervals in a circumferential direction of the second fitting portion.

[0032] (6) The driving device of the present invention may be, in (5),

[0033] In the retainer,

[0034] The first press-fitting portion is disposed at two locations facing each other in a direction from the first fitting portion toward the second fitting portion and at two locations in a direction intersecting the two locations.

[0035] The second press-fitting portions are disposed at two locations facing each other in a direction intersecting a direction from the first fitting portion toward the second fitting portion.

[0036] (7) The driving device of the present invention may be, in the above (1),

[0037] The holder includes a plurality of anti-detachment portions that prevent the motor from detaching from the holder.

[0038] (8) The driving device of the present invention may be, in (7),

[0039] In the retainer,

[0040] The anti-detachment portion is an elastically deformable engaging piece that engages with the motor.

[0041] (9) The driving device of the present invention may be, in the above (3),

[0042] The positioning protrusion of the motor is a bearing holder.

[0043] (1) A driving device according to an embodiment of the present invention has the structure of (1), whereby the relative positions of the plurality of motors can be determined on the outside of the housing by using only the motors and the retainer without assembling the plurality of motors into the housing. Therefore, the plurality of motors can be easily positioned without using a dedicated fixture such as a housing and pins. Furthermore, the plurality of motors can be inserted into the housing while being positioned by the retainer. Moreover, the plurality of motors that have been relatively positioned in advance can be directly inserted into the housing together with the retainer and screwed, etc., thereby shortening the operation time associated with the assembly of the motors, improving the operability, and reducing the manufacturing cost.

[0044] At this time, since the retainer is not fixed to the housing, when the motor is fixed by screw fastening, the retainer does not interfere with the positioning of the motor relative to the housing.

[0045] Furthermore, by simply inserting the plurality of motors into the retainer without assembling the plurality of motors into the interior of the housing, assembly operations such as welding of leads (wiring, harness) to power supply terminals of the plurality of motors can be smoothly performed on the outside of the housing. In addition, since the positioning and welding operations can be completed without accommodating the plurality of motors into the interior of the housing, it is easy to perform air blowing and other treatments on the welded plurality of motors and the retainer on the outside of the housing.

[0046] Thus, it is possible to prevent solder slag from entering the housing or from being bitten into gears installed on a plurality of motors and the drive shafts of the motors, etc. Therefore, it is possible to shorten the operation time, improve the workability, and reduce the manufacturing cost.

[0047] (2) The drive device of the present invention has the structure of (2) in (1), thereby making it possible to easily position the plurality of motors so as to achieve relative positions and relative postures corresponding to the relative positions of the fitting parts formed on the base part simply by inserting and fitting the positioning fittings of the plurality of motors into the fitting parts respectively.

[0048] Therefore, by forming the plurality of engaging portions in the base portion in advance to correspond to the storage positions of the plurality of motors stored in the housing, the plurality of motors can be easily positioned. In addition, the relative positions of the plurality of motors that are not assembled inside the housing but stored in the housing can be positioned on the outside of the housing. Furthermore, the plurality of motors that have been relatively positioned on the outside of the housing in advance can be directly inserted into the housing together with the retainer and screwed and the like can be performed.

[0049] (3) The drive device of the present invention has the structure of (3) in (2), whereby the positioning protrusion is engaged with the engagement hole, so that the plurality of motors can be easily positioned. Therefore, the plurality of motors can be easily positioned in advance outside the housing. By assembling the plurality of motors positioned outside the housing together with the retainer inside the housing, the workability of the assembly operation can be improved.

[0050] (4) The drive device of the present invention has the structure of (4) in (3), thereby being able to accurately position the second motor pressed into the second fitting portion having the second press-in portion, with the position of the first motor pressed into the first fitting portion having the first press-in portion as a reference. Moreover, with respect to the high-precision positioning of these motors, the relative positions of the motors housed in the housing can be positioned on the outside of the housing when the motors are not assembled inside the housing. Furthermore, by directly inserting these motors that have been relatively positioned in advance into the housing together with the retainer and performing operations such as screw tightening, the first motor pressed into the first fitting portion having the first press-in portion can be easily screwed to the housing, and then the position of the second motor pressed into the second fitting portion having the second press-in portion can be adjusted.

[0051] Furthermore, since the second motor is pressed into the second fitting portion having the second press-in portion, the second press-in portion is formed at two locations, the press-in posture of the motor can be finely adjusted. Therefore, in the second motor that is subsequently screwed, the adjustment direction in positioning the motor relative to the housing can be limited to only one direction, thereby improving workability.

[0052] (5) The drive device of the present invention has the structure of (5) in (4), thereby being able to accurately position the second motor pressed into the second fitting portion having two second press-in portions, with the position of the first motor pressed into the first fitting portion having the first press-in portion arranged at equal intervals at more than three locations as a reference. Moreover, with respect to the high-precision positioning of these motors, the relative positions of the motors housed in the housing can be positioned on the outside of the housing when the motors are not assembled inside the housing. Furthermore, by directly inserting these motors that have been relatively positioned in advance into the housing together with the retainer and performing operations such as screw tightening, the first motor pressed into the first fitting portion having the first press-in portion can be easily screwed to the housing, and then the position of the second motor pressed into the second fitting portion having the second press-in portion can be adjusted.

[0053] (6) The drive device of the present invention has the structure of (6) in (5), thereby being able to accurately position the second motor pressed into the second fitting portion having the second press-in portion (two-way press-in portion) with reference to the position of the first motor pressed into the first fitting portion having the first press-in portion (four-way press-in portion). Moreover, with respect to the high-precision positioning of the two motors, the relative positions of the two motors in the state of being accommodated in the housing can be positioned from the outside of the housing in a state where the two motors are not assembled inside the housing. Moreover, by directly inserting the two motors that have been relatively positioned in advance into the housing together with the retainer and performing screw tightening operations, the motor pressed into one of the fitting portions having the four-way press-in portion can be easily screw-fastened to the housing, and then the position of the motor pressed into the other fitting portion having the two-way press-in portion can be adjusted. Therefore, in the motor that is subsequently screw-fastened, the adjustment direction in the positioning of the motor relative to the housing can be made one direction of the interaxial direction, thereby improving workability. Therefore, it is possible to simplify the jig used without using a housing, a pin, or the like, and to make the axial directions of the two motors parallel, thereby facilitating high-precision positioning of the interaxial distance.

[0054] Furthermore, for a motor that is pressed into another fitting portion having two-way press-in portions, the press-in posture of the motor can be finely adjusted in a direction intersecting the direction in which the two-way press-in portions face each other. Therefore, in the motor that is subsequently screwed, the adjustment direction in positioning the motor relative to the housing can be limited to only one direction, thereby improving workability.

[0055] (7) The drive device of the present invention has the structure of (7) in (1), whereby the plurality of motors can be prevented from being separated from the retainer by the anti-separation portion. Thus, the plurality of motors that have been relatively positioned in advance outside the housing can be directly inserted into the housing together with the retainer and screwed, etc., without being separated from the retainer.

[0056] (8) The drive device of the present invention has the structure of (8) in (7), thereby preventing multiple motors from being detached from the retainer by the anti-detachment part. As a result, multiple motors that have been relatively positioned in advance on the outside of the housing can be directly inserted into the housing together with the retainer and screwed, etc. without being detached from the retainer. In addition, the anti-detachment part will not interfere with the positioning of the motor by the various press-fit parts formed in the various fitting parts of the retainer. As a result, the adjustment in the direction of the axis arrangement of the motor will not be difficult due to the anti-detachment part, and at the same time, the adjustment of the distance between the axis lines of the motor will not be difficult due to the anti-detachment part.

[0057] (9) The drive device of the present invention has the structure of (9) in (3), thereby making it possible to easily position the motor relative to the bearing retainer without providing a structure other than the bearing retainer as a positioning protrusion on the motor. This can prevent an increase in the number of parts, an increase in the number of steps in the motor manufacturing process, and an increase in manufacturing cost.

[0058] Effects of the Invention

[0059] According to the present invention, it is possible to achieve an effect that two actuators can be positioned with high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] [ Figure 1 ] is a cross-sectional view showing an embodiment of the driving device of the present invention.

[0061] [ Figure 2 ] is a top view showing an embodiment of the driving device of the present invention.

[0062] [ Figure 3 ] is a three-dimensional view of a retainer in an embodiment of the drive device of the present invention. DETAILED DESCRIPTION

[0063] Hereinafter, embodiments of the driving device of the present invention will be described based on the drawings.

[0064] Figure 1 It is a cross-sectional view showing the driving device in this embodiment. Figure 2 1 is a plan view showing a driving device in this embodiment. In the figure, reference numeral 1 is a driving device.

[0065] The drive device 1 of the present embodiment includes a power unit. The power unit integrally includes an engine (prime mover) and a transmission located at the front side thereof. The power unit is connected to the rear wheel via, for example, a chain transmission mechanism.

[0066] The transmission is a stepped transmission. The transmission has a main shaft and a countershaft and a speed change gear set spanning the two shafts. The countershaft constitutes the output shaft of the transmission and the power unit. The left end of the countershaft protrudes to the left rear of the transmission case and is connected to the rear wheel via a chain transmission mechanism.

[0067] A power transmission disconnect device is coaxially arranged on the main shaft of the transmission. The power transmission disconnect device disconnects or connects the power transmission between the crankshaft of the engine and the main shaft of the transmission. The power transmission disconnect device disconnects or connects the power transmission between the crankshaft of the engine and the main shaft of the transmission through at least one of the operation of the operating member (lever) by the occupant and the operation of the actuator described in detail later.

[0068] The power transmission disconnect device is, for example, a wet multi-plate mechanism, which is a so-called normally closed mechanism. The rotational power of the crankshaft is transmitted to the main shaft via the power transmission disconnect device, and is transmitted from the main shaft to the secondary shaft via any gear pair of the speed change gear set. The crank housing in the secondary shaft is equipped with a drive sprocket of the chain transmission mechanism.

[0069] A change mechanism for switching the gear pairs of the speed change gear set is housed in the transmission case near the transmission. The change mechanism switches the gear pairs used for power transmission between two shafts in the speed change gear set.

[0070] Here, in the vehicle, the driver performs a speed change operation of the transmission, and the disconnection or connection operation of the power transmission disconnect device is automatically performed by electrical control according to the operation of a shift pedal. That is, the vehicle adopts a so-called semi-automatic transmission system.

[0071] The transmission system includes an actuator, an electronic control unit (ECU (Electronic Control Unit), a control unit), various sensors, and various devices.

[0072] The ECU controls the operation of the ignition device and the fuel injection device, and also controls the operation of the actuator.

[0073] In order to disconnect or connect the power transmission disconnect device, the actuator controls the working torque applied to the release shaft. The actuator includes: an electric motor 2 (hereinafter referred to as motor 2) as a driving source, and a speed reduction mechanism 8 that transmits the driving force of the motor 2 to the release shaft. The speed reduction mechanism 8 includes a first speed reduction shaft and a second speed reduction shaft.

[0074] The ECU calculates the following current values ​​based on a pre-set calculation program. The current value is the value of the current supplied to the motor 2 in order to disconnect or connect the power transmission disconnect device. The supply current to the motor 2 is obtained based on the correlation with the torque output to the motor 2. The target torque of the motor 2 is proportional to the working torque applied to the separation shaft. The current value supplied to the motor 2 is detected by a current sensor included in the ECU. The operation of the actuator is controlled according to the change of the detection value.

[0075] The driving device 1 of the present embodiment is provided as an actuator.

[0076] like Figure 1 , Figure 2 As shown, the driving device 1 of the present embodiment includes a motor 2 , a speed reduction mechanism 8 , a housing 3 , and a holder 10 .

[0077] The motor 2 is, for example, a direct current (DC) motor, and is disposed, for example, parallel to the axial direction of the separation shaft. The motor 2 is disposed so that the drive shaft 21 protrudes upward. The speed reduction mechanism 8 transmits the driving force of the motor 2 to the separation shaft.

[0078] The speed reduction mechanism 8 reduces the rotational power output from the motor 2 and transmits it to the separation shaft. The speed reduction mechanism 8 includes, for example, a gear train axially parallel to the separation shaft. The speed reduction mechanism 8 includes a driving gear 21a and a speed reduction gear 7. The speed reduction shaft 7a of the speed reduction gear 7 is rotatably supported on the housing 3. Line C1 in the figure represents the central axis of the speed reduction shaft 7a.

[0079] The drive gear 21a is integrally provided on the drive shaft 21 of each motor 2. The speed reduction gear 7 meshes with each drive gear 21a. The housing 3 accommodates the speed reduction mechanism 8 and the motor 2. The housing 3 has a lead-out portion 3a equipped with a washer and leading the lead wires R1 to R4 connected to the motor 2 to the outside of the housing 3.

[0080] The motor 2 and the separation shaft can always be linked via the speed reduction mechanism 8. Thus, a system is constructed that directly disconnects or connects the power transmission disconnection device using an actuator. The driving force of the motor 2 is decelerated by the speed reduction mechanism 8 and transmitted to the separation shaft.

[0081] In the drive device 1 of the present embodiment, a single actuator includes a plurality of (two) motors 2A and a motor 2B.

[0082] Hereinafter, the motor 2 located in front of the actuator is sometimes referred to as the first motor 2A, and the motor 2 located in the rear and inward in the width direction relative to the first motor 2A is sometimes referred to as the second motor 2B. In the figure, line C01 and line C02 respectively represent the central axis (drive axis) of the motor 2A and the motor 2B. For the sake of convenience, the motor 2A and the motor 2B are sometimes collectively referred to as the motor 2. In addition, the axis C01 and the axis C02 are sometimes collectively referred to as the axis C0.

[0083] The motor 2A and the motor 2B are housed in the housing 3 in such a manner that the axis C01 and the axis C02 are parallel to each other. The motor 2A and the motor 2B are separated from each other. The direction in which the motor 2A and the motor 2B are arranged in parallel and separated, that is, the direction in which the axis C01 and the axis C02 are arranged, is set as the X direction. In the motor 2A and the motor 2B, the drive shaft 2A1 and the drive shaft 2B1 are arranged to face the same direction. The direction in which the drive shaft 2A1 and the drive shaft 2B1 face is set as the Z direction. The direction orthogonal to the X direction and the Z direction is set as the Y direction.

[0084] The motor 2A and the motor 2B have a yoke 2a having a substantially similar cylindrical shape. In the motor 2, a drive shaft 21 protrudes from one end of the cylindrical yoke 2a in the axial direction in the Z direction. The yoke 2a is made of metal.

[0085] A flange portion 25 is formed at one end of the yoke 2a as the periphery of the drive shaft 21. The flange portion 25 is enlarged along a plane extending from one end of the yoke 2a toward the X direction and the Y direction. The flange portion 25 is screwed to the housing 3 by fixing screws 53 and 54 parallel to the Z direction along the axis C0. The flange portion 2A5 of the motor 2A and the flange portion 2B5 of the motor 2B are arranged on a substantially same horizontal plane when housed in the housing 3.

[0086] At one end of the yoke 2a, a bearing holder (bearing retainer) 22 is formed around the drive shaft 21. The bearing retainer 22 has a roughly circular profile when viewed in the Z direction. The bearing retainer 22 has a profile that is smaller in diameter than the yoke 2a when viewed in the Z direction. The bearing retainer 22 is a fixed protrusion described later. At one end of the yoke 2a close to the drive shaft 21, two terminals (power supply terminals) 23 and terminals (power supply terminals) 24 on both sides of the drive shaft 21 protrude in the Z direction. The terminals 23 and 24 are respectively configured separately from the bearing retainer 22 in the X direction. The other end of the yoke 2a abuts against the bottom of the housing 3.

[0087] The motor 2A and the motor 2B are arranged such that the fixing screw 5A3, the terminal 2A3, the bearing holder (first positioning protrusion) 2A2, the terminal 2A4, the terminal 2B4, the bearing holder (second positioning protrusion) 2B2, the terminal 2B3, and the fixing screw 5B3 are arranged along the X direction.

[0088] Figure 3 It is a perspective view showing a retainer in the driving device according to the present embodiment.

[0089] like Figure 1 to Figure 3 As shown, the relative position of the motor 2A and the motor 2B is defined by the retainer 10. The motor 2A and the motor 2B are only mounted on the retainer 10. The retainer 10 is not connected to the housing 3.

[0090] The holder 10 includes a base portion 11, and two fitting portions (first fitting portion) 12 and a fitting portion (second fitting portion) 13 provided on the base portion 11. The base portion 11, the fitting portion 12, and the fitting portion 13 are formed integrally. The holder 10 is made of resin.

[0091] The base 11 is generally plate-shaped. When the motor 2 is stored in the housing 3, the base 11 is arranged along a plane facing the X direction and the Y direction relative to the housing 3. The base 11 is positioned along the flange 2A5 of the motor 2A and the flange 2B5 of the motor 2B. When the motor 2 is stored in the housing 3, the flange 2A5 of the motor 2A contacts the flange 2B5 of the motor 2B and the back surface of the base 11 in the Z direction.

[0092] The base portion 11 has a substantially rectangular outline. In the base portion 11, a notch 14a is formed at the center of one of the sides extending in the Y direction in the outline. In the base portion 11, a notch 14b and a through hole 14c are respectively formed at the centers of two sides extending in the X direction in the outline. The through hole 14c may also be a notch corresponding to the notch 14b.

[0093] In the base portion 11, a side inclined relative to the corner of the side where the cutout 14a is formed and the side where the through hole 14c is formed is formed. In the base portion 11, a side inclined relative to the corner of the side where the cutout 14a is formed and the side where the cutout 14b is formed is formed. In the side inclined at the corner of the side where the cutout 14a is formed and the side where the through hole 14c is formed, a folded portion 16 folded back in the Z direction is formed in a manner covering the contour end of the flange portion 2B5. The folded portion 16 is located near the lead-out portion 3a equipped with a gasket and leading the leads R1 to R4 to the outside of the housing 3. The folded portion 16 is formed so that the leads R1 to R4 connected to the motor 2 do not contact the contour end of the flange portion 2B5.

[0094] The fitting part 12 and the fitting part 13 protrude toward the surface on the same side in the Z direction relative to the base part 11. The fitting part 12 and the fitting part 13 are formed to protrude toward the surface on the opposite side of the back side of the base part 11 that contacts the flange part 25 in the Z direction. The fitting part 12 and the fitting part 13 do not protrude from the back side of the base part 11 in the Z direction.

[0095] The fitting part 12 and the fitting part 13 respectively have a fitting hole 12h and a fitting hole 13h which penetrate the base part 11 in the Z direction. The inner peripheral contour of the fitting part 12 and the fitting part 13 as viewed in the Z direction is substantially circular. The fitting part 12 and the fitting part 13 are formed in a cylindrical shape around the fitting hole 12h and the fitting hole 13h, respectively. The fitting part 12 and the fitting part 13 are arranged separately on the base part 11 in the X direction. The fitting part 12 and the fitting part 13 are separated from the contour of the base part 11 in the X direction and the Y direction.

[0096] The axes of the cylinders of the fitting portion 12 and the fitting portion 13 face the Z direction. The axes of the cylinders of the fitting portion 12 and the fitting portion 13 are parallel. In particular, the dimension of the fitting portion 12 in the Z direction is equal to the dimension of the fitting portion 13 in the Z direction. The central axis of the inner circumference of the cylindrical fitting portion 12 and the central axis of the inner circumference of the cylindrical fitting portion 13 are parallel to each other.

[0097] The motor 2A is fitted with the fitting portion 12. The inner peripheral contour of the fitting portion 12 as viewed in the Z direction is substantially equal to the contour of the bearing holder 2A2 as viewed in the Z direction. The dimension of the fitting portion 12 in the Z direction, that is, the dimension from the back surface of the base portion 11 to the Z direction end of the fitting portion 12 protruding from the surface, is equal to the Z direction dimension of the bearing holder 2A2, or is slightly smaller than the Z direction dimension of the bearing holder 2A2.

[0098] The motor 2B is fitted with the fitting portion 13. The inner peripheral contour of the fitting portion 13 as viewed in the Z direction is substantially equal to the contour of the bearing holder 2B2 as viewed in the Z direction. The dimension of the fitting portion 13 in the Z direction, that is, the dimension from the back surface of the base portion 11 to the Z direction end of the fitting portion 13 protruding from the surface, is equal to the Z direction dimension of the bearing holder 2B2, or is slightly smaller than the Z direction dimension of the bearing holder 2A2.

[0099] The fitting portion 12 has four-sided press-in portions 12a and 12b on the inner circumference. The four-sided press-in portions 12a and 12b are formed at four locations on the inner circumference of the fitting portion 12. The four-sided press-in portions 12a and 12b both protrude radially inward from the inner circumference of the fitting portion 12. The four-sided press-in portions 12a and 12b are pressed into the bearing retainer 2A2, which is a positioning protrusion of the motor 2A.

[0100] A pair of square press-fit portions 12a are formed at two locations on the inner circumferential surface of the fitting portion 12. The square press-fit portions 12a are formed at positions that are both ends in the X direction on the inner circumferential surface of the fitting portion 12. The paired square press-fit portions 12a face each other. The square press-fit portions 12a are formed as flat surfaces having a predetermined size in the circumferential direction relative to the inner circumferential surface of the fitting portion 12 that is a cylindrical surface.

[0101] The planar square press-fitting portion 12a is formed to be substantially parallel to the plane along the Y direction and the Z direction. A pair of square press-fitting portions 12a facing each other in the X direction are parallel to each other. The distance between the pair of square press-fitting portions 12a in the X direction is slightly shorter than the diameter dimension of the inner peripheral surface of the fitting portion 12.

[0102] The radial thickness of the fitting portion 12 is increased in the square press-fit portion 12a. Thus, when the bearing retainer 2A2 is inserted into the fitting portion 12, the pair of square press-fit portions 12a press the outer periphery of the bearing retainer 2A2 in the X directions facing each other.

[0103] The radial separation distance of the flat square press-fit portion 12a from the central axis of the inner circumferential surface of the cylindrical fitting portion 12 is smaller than the radial separation distance of the inner circumferential surface of the cylindrical fitting portion 12 from the central axis. That is, the square press-fit portion 12a protrudes radially inwardly more than the inner circumferential surface of the cylindrical fitting portion 12. The protrusion of the square press-fit portion 12a from the inner circumferential surface of the fitting portion 12 is extremely small, and the square press-fit portion 12a made of resin is slightly deformed when the metal bearing retainer 2A2 is inserted into the fitting portion 12.

[0104] A pair of square press-fit portions 12b are formed at two locations on the inner circumferential surface of the fitting portion 12. The square press-fit portions 12b are formed at positions that are both ends in the Y direction on the inner circumferential surface of the fitting portion 12. The paired square press-fit portions 12b face each other. The square press-fit portions 12b are formed as flat surfaces having a predetermined size in the circumferential direction relative to the inner circumferential surface of the fitting portion 12 that is a cylindrical surface.

[0105] The planar square press-fitting portion 12a is formed to be substantially parallel to the plane along the X direction and the Z direction. The pair of square press-fitting portions 12b facing each other in the Y direction are parallel to each other. The distance between the pair of square press-fitting portions 12b in the Y direction is slightly shorter than the diameter dimension of the inner peripheral surface of the fitting portion 12.

[0106] The radial thickness of the fitting portion 12 is increased in the square press-fit portion 12b. Thus, when the bearing retainer 2A2 is inserted into the fitting portion 12, the pair of square press-fit portions 12b press the outer periphery of the bearing retainer 2A2 in the mutually opposing Y directions.

[0107] The radial separation distance of the flat square press-fit portion 12b from the central axis of the inner circumferential surface of the cylindrical fitting portion 12 is smaller than the radial separation distance of the inner circumferential surface of the cylindrical fitting portion 12 from the central axis. That is, the square press-fit portion 12b protrudes radially inwardly more than the inner circumferential surface of the cylindrical fitting portion 12. The protrusion of the square press-fit portion 12b from the inner circumferential surface of the fitting portion 12 is extremely small, and the square press-fit portion 12b made of resin is slightly deformed when the metal bearing retainer 2A2 is inserted into the fitting portion 12.

[0108] The pair of square press-in parts 12a and the pair of square press-in parts 12b are arranged at positions perpendicular to each other. The square press-in parts 12a and the square press-in parts 12b, which are planes, are perpendicular to each other.

[0109] When the bearing holder 2A2 is inserted into the fitting portion 12, a pair of square press-in portions 12a press the outer periphery of the bearing holder 2A2 in the X direction, and at the same time, a pair of square press-in portions 12b press the outer periphery of the bearing holder 2A2 in the Y direction. Thus, the motor 2A is positioned relative to the holder 10. In the fitting portion 12, the motor 2A can be positioned relative to the holder 10 in the orthogonal X and Y directions by the square press-in portions 12a and 12b that are paired in directions orthogonal to each other.

[0110] The fitting portion 13 has two press-fit portions 13b on the inner circumference. The two press-fit portions 13b are formed at two locations on the inner circumference of the fitting portion 13. Both of the two press-fit portions 13b protrude radially inward from the inner circumference of the fitting portion 13. The two press-fit portions 13b are pressed into the bearing retainer 2B2, which is a positioning convex portion of the motor 2B.

[0111] A pair of two-way press-in portions 13b are formed at two locations on the inner circumferential surface of the fitting portion 13. The two-way press-in portions 13b are formed at positions that are both ends in the Y direction on the inner circumferential surface of the fitting portion 13. The paired two-way press-in portions 13b face each other. The two-way press-in portions 13b are formed as flat surfaces having a predetermined size in the circumferential direction relative to the inner circumferential surface of the fitting portion 13 that is a cylindrical surface.

[0112] The two-sided press-in portions 13b are formed to be substantially parallel to the planes along the X direction and the Z direction. The pair of two-sided press-in portions 13b facing each other in the Y direction are parallel to each other. The distance between the pair of two-sided press-in portions 13b in the Y direction is slightly shorter than the diameter of the inner circumferential surface of the fitting portion 13.

[0113] The radial thickness of the fitting portion 13 is increased in the two-way press-fitting portion 13b. Thus, when the bearing retainer 2B2 is inserted into the fitting portion 13, the pair of two-way press-fitting portions 13b press the outer periphery of the bearing retainer 2B2 in the mutually opposing Y directions.

[0114] The radial separation distance of the two-way press-fit portion 13b in the form of a plane from the central axis of the inner peripheral surface of the fitting portion 13 in the form of a cylindrical surface is smaller than the radial separation distance of the inner peripheral surface of the fitting portion 13 in the form of a cylindrical surface from the central axis. That is, the two-way press-fit portion 13b protrudes inwardly in the radial direction more than the inner peripheral surface of the fitting portion 13 in the form of a cylindrical surface. The dimension of the two-way press-fit portion 13b protruding from the inner peripheral surface of the fitting portion 13 is extremely small, and is such that the two-way press-fit portion 13b made of resin is slightly deformed when the metal bearing retainer 2B2 is inserted into the fitting portion 13.

[0115] The pair of two-way press-fitting portions 13b are arranged at positions corresponding to the four-way press-fitting portions 12b of the fitting portion 12. The two-way press-fitting portions 13b and the four-way press-fitting portions 12b, which are planar, are parallel to each other.

[0116] When the bearing retainer 2B2 is inserted into the fitting portion 13, a pair of two-sided press-in portions 13b press the outer periphery of the bearing retainer 2B2 in the Y direction. Thus, the motor 2B is positioned relative to the retainer 10. In the fitting portion 13, the motor 2B can be positioned relative to the retainer 10 in the Y direction only by the two-sided press-in portions 13b that are different from the fitting portion 12. In the fitting portion 13, with respect to the X direction, the position of the bearing retainer 2B2 is restricted only by the inner peripheral surface of the fitting portion 13. That is, when the bearing retainer 2B2 is inserted into the fitting portion 13, the motor 2B can be slightly moved relative to the retainer 10.

[0117] A through hole 15a and a through hole 15b are formed in the base portion 11 between the fitting portion 12 and the fitting portion 13. The through hole 15a is formed near the fitting portion 12. The through hole 15b is formed near the fitting portion 13. A cutout 15c is formed in the base portion 11 on the opposite side of the fitting portion 13 with respect to the fitting portion 12 in the X direction. The cutout 15c is formed near the fitting portion 12. The cutout 15c may also be a through hole.

[0118] The cutout 15c, the fitting portion 12, the through hole 15b, the through hole 15a, the fitting portion 13, and the cutout 14a are arranged in the X direction. The cutout 15c, the fitting portion 12, the through hole 15b, the through hole 15a, the fitting portion 13, and the cutout 14a are all located at the center of the base portion 11 in the Y direction.

[0119] The cutout 15c is formed at a position through which the terminal 2A3 can pass when the bearing holder 2A2 of the motor 2A is inserted into the fitting portion 12. The through hole 15b is formed at a position through which the terminal 2A4 can pass when the bearing holder 2A2 of the motor 2A is inserted into the fitting portion 12. The through hole 15a is formed at a position through which the terminal 2B4 can pass when the bearing holder 2B2 of the motor 2B is inserted into the fitting portion 13. The cutout 14a is formed at a position through which the terminal 2B4 can pass when the bearing holder 2B2 of the motor 2B is inserted into the fitting portion 13.

[0120] When the bearing holder 2A2 of the motor 2A is inserted into the fitting portion 12, the terminals 2A3 and 2A4 penetrate the base portion 11 and protrude from the surface. When the bearing holder 2B2 of the motor 2B is inserted into the fitting portion 13, the terminals 2B3 and 2B4 penetrate the base portion 11 and protrude from the surface.

[0121] The cutout 15c, the through hole 15b, the through hole 15a, and the cutout 14a are all contour shapes through which the terminal 2A3, the terminal 2A4, the terminal 2B3, and the terminal 2B4 can pass.

[0122] The cutout 14 a is formed outside the terminal end 2B3 with respect to the fitting portion 13 in the X direction so that the fixing screws 5B3 do not interfere with the base portion 11 when the flange portion 2B5 is fixed to the housing 3 by the fixing screws 5B3 .

[0123] The cutout 14b is formed so that the fixing screws 5B4 do not interfere with the base 11 when the flange 2B5 is fixed to the housing 3. The cutout 14b is formed so that the fixing screws 5A4 do not interfere with the base 11 when the flange 2A5 is fixed to the housing 3.

[0124] The through hole 14c is formed so that the fixing screw 5B4 does not interfere with the base 11 when the flange 2B5 is fixed to the housing 3 by the fixing screw 5B4. The through hole 14c is formed so that the fixing screw 5A4 does not interfere with the base 11 when the flange 2A5 is fixed to the housing 3 by the fixing screw 5A4.

[0125] Furthermore, when the flange portion 2A5 is fixed to the housing 3 by the fixing screws 5A3 , the fixing screws 5A3 are located outside the contour of the base portion 11 when viewed in the Z direction, and therefore do not interfere.

[0126] In the base portion 11, the two sides extending along the X direction in the outline thereof are provided with the anti-detachment parts 18a, 18b, 19a, and 19b at positions outside the cutout 14b and the through hole 14c in the X direction. The anti-detachment parts 18a, 18b, 19a, and 19b are all formed as snap-fit ​​claws. The anti-detachment parts 18a, 18b, 19a, and 19b extend from the back side of the base portion 11 along the Z direction.

[0127] The anti-detachment portion 18a and the anti-detachment portion 18b are formed as snap-fit ​​claws that face each other and protrude in the Y direction. The anti-detachment portion 18a and the anti-detachment portion 18b are both formed near the contour edge of the base portion 11 close to the fitting portion 13 in the Y direction. The anti-detachment portion 18a and the anti-detachment portion 18b are formed to have substantially the same width dimension in the X direction.

[0128] When the bearing holder 2B2 of the motor 2B is inserted into the fitting portion 13 , the retaining portions 18 a and 18 b can be locked to the flange portion 2B5 .

[0129] When the bearing holder 2B2 of the motor 2B is inserted into the fitting portion 13 , the anti-detachment portions 18 a and 18 b can be locked to the flange portion 2B5 with a size that leaves a slight margin with respect to the flange portion 2B5 .

[0130] The anti-detachment portion 18a, the center of the fitting portion 13, and the anti-detachment portion 18b are arranged in the Y direction, but they may not be located in a straight line. The reason is that the anti-detachment portion 18a and the anti-detachment portion 18b are only to prevent the motor 2B from detaching from the retainer 10, and are not to be firmly fixed like positioning.

[0131] The anti-detachment portion 19a and the anti-detachment portion 19b are formed as snap-fit ​​claws that face each other and protrude in the Y direction. The anti-detachment portion 19a and the anti-detachment portion 19b are both formed near the contour edge of the base portion 11 close to the fitting portion 12 in the Y direction. The anti-detachment portion 19a and the anti-detachment portion 19b are formed to have substantially the same width dimension in the X direction.

[0132] When the bearing holder 2A2 of the motor 2A is inserted into the fitting portion 12 , the retaining portions 19 a and 19 b can be locked to the flange portion 2A5 .

[0133] When the bearing holder 2A2 of the motor 2A is inserted into the fitting portion 12 , the anti-detachment portions 19 a and 19 b can be locked to the flange portion 2A5 with a size that leaves a slight margin with respect to the flange portion 2A5 .

[0134] The anti-detachment portion 19a, the center of the fitting portion 12, and the anti-detachment portion 19b are arranged in the Y direction, but they may not be located in a straight line. The reason is that the anti-detachment portion 19a and the anti-detachment portion 19b are only to prevent the motor 2A from detaching from the retainer 10, and are not to be firmly fixed like positioning.

[0135] A plurality of wiring holding portions (hooks) 17a to 17h are formed on the base portion 11. The wiring holding portions 17a to 17h are formed so as to protrude from the surface of the base portion 11 in the Z direction. The wiring holding portions 17a to 17h fix the positions where the leads (wiring harness, wiring) R1 to R4 connected to the terminals 23 and 24 are wired along the surface of the base portion 11 from the vicinity of the folded portion 16. This is because the housing 3 has a lead-out portion 3a that is equipped with a washer near the folded portion 16 and leads the leads R1 to R4 to the outside of the housing 3.

[0136] The wiring holding portions 17 a to 17 h all protrude relative to the base portion 11 in the Z direction in the opposite direction to the retaining portions 18 a , 18 b , 19 a , and 19 b .

[0137] The wiring holding portion 17a is formed near the folded portion 16 and near the fitting portion 13. The wiring holding portion 17a fixes the two lead wires R1 and R2 connected to the terminal 2B4 of the through hole 15a and the terminal 2B3 of the notch 14a.

[0138] The wiring holding portion 17b is formed near the folded portion 16 and near the fitting portion 13. The wiring holding portion 17b fixes two lead wires R3 and lead wire R4 connected to the terminal 2A4 of the through hole 15b and the terminal 2A3 of the notch 15c.

[0139] The wiring holding portion 17c is formed near the fitting portion 13 and near the through hole 14c. The wiring holding portion 17c fixes the two lead wires R3 and the lead wire R4 connected to the terminal 2A4 of the through hole 15b and the terminal 2A3 of the notch 15c.

[0140] The wiring holding portion 17d is formed between the fitting portion 13 and the fitting portion 12 and between the through hole 14c and the notch 14b. The wiring holding portion 17d fixes the two lead wires R3 and the lead wire R4 connected to the terminal 2A4 of the through hole 15b and the terminal 2A3 of the notch 15c.

[0141] The wiring holding portion 17e is formed near the fitting portion 12 and near the through hole 14c. The wiring holding portion 17e fixes the lead wire R4 connected to the terminal 2A3 of the notch 15c.

[0142] The wiring holding portion 17f is formed near the fitting portion 12 and near the cutout 15c. The wiring holding portion 17f fixes the lead wire R4 connected to the terminal 2A3 of the cutout 15c.

[0143] The wiring holding portion 17g is formed near the fitting portion 13 and near the cutout 14a. The wiring holding portion 17g fixes the lead wire R2 connected to the terminal 2B4 of the through hole 15a.

[0144] The wiring holding portion 17h is formed near the fitting portion 13 and near the cutout 14b. The wiring holding portion 17h fixes the lead wire R2 connected to the terminal 2B4 of the through hole 15a.

[0145] In addition, the wiring holding portions 17a to 17h are not limited to such positions and numbers.

[0146] In the drive device 1 of this embodiment, when the motors 2A and 2B are housed in the housing 3 , the motors 2A and 2B are mounted on the holder 10 in advance. Then, the motors 2A and 2B mounted on the holder 10 are housed in the housing 3 .

[0147] First, the motor 2A is mounted on the holder 10 outside the housing 3. The bearing holder 2A2 of the motor 2A is inserted into the fitting portion 12. At the same time, the terminal 2A3 is positioned in the notch 15c, and the terminal 2A4 is passed through the through hole 15b.

[0148] At the same time, the anti-detachment portion 19a and the anti-detachment portion 19b are locked to the flange portion 2A5 with a slight margin relative to the flange portion 2A5.

[0149] At this time, in the fitting portion 12, the outer periphery of the bearing retainer 2A2 is pressed inward in the X direction by a pair of square press-in portions 12a, and at the same time, is pressed inward in the Y direction by a pair of square press-in portions 12b. In addition, the direction of the axis C01 is set by the inner peripheral surface of the cylindrical fitting portion 12. Thus, the motor 2A is positioned relative to the retainer 10. In the fitting portion 12, the motor 2A is positioned relative to the retainer 10 in the mutually orthogonal X and Y directions by the square press-in portions 12a and the square press-in portions 12b that are paired in mutually orthogonal directions.

[0150] Thus, the motor 2A is positioned relative to the holder 10 as a reference for positioning the motor 2B relative to the holder 10 .

[0151] At the same time, the motor 2A is prevented from being separated from the holder 10 by the separation preventing portions 19 a and 19 b.

[0152] Next, the motor 2B is mounted on the holder 10 outside the housing 3. The bearing holder 2B2 of the motor 2B is inserted into the fitting portion 13. At the same time, the terminal 2B4 is passed through the through hole 15a, and the terminal 2B3 is positioned in the notch 14a.

[0153] At the same time, the anti-detachment portion 18a and the anti-detachment portion 18b are locked to the flange portion 2B5 with a slight margin relative to the flange portion 2B5.

[0154] At this time, in the fitting portion 13, the outer periphery of the bearing retainer 2B2 is pressed inward in the Y direction by a pair of two-sided press-in portions 13b. In addition, the direction of the axis C02 is set by the inner peripheral surface of the cylindrical fitting portion 13. Thus, the motor 2B is positioned relative to the retainer 10. In the fitting portion 13, the motor 2B is positioned relative to the retainer 10 in one direction, i.e., the Y direction, by two-sided press-in portions 13b that are opposite and paired in the Y direction. In the above state, the motor 2B can be slightly moved in the X direction relative to the retainer 10, or the posture relative to the retainer 10 can be changed.

[0155] Thus, the motor 2B can be accurately positioned relative to the holder 10 with reference to the position of the motor 2A.

[0156] At the same time, the motor 2B is prevented from being detached from the holder 10 by the detachment preventing portions 18 a and 18 b.

[0157] Next, on the outside of the housing 3 , leads (wiring harnesses, wiring) R1 to R4 connected to the terminals 23 and 24 are fixed to the wiring holding portions 17 a to 17 h along the surface of the base portion 11 from the vicinity of the folded portion 16 .

[0158] In addition, regarding the mounting of the motors 2A and 2B to the holder 10 and the mounting of the leads R1 to R4 to the holder 10 , either order may be performed first. Figure 3 The lead wires R1 to R4 are shown in a state where the lead wires R1 to R4 are attached to the holder 10 before the motor 2 .

[0159] At this time, the lead wire R1 connected to the terminal 2B3 is led back from the folded portion 16 to the cutout 14a via the wiring holding portion 17a.

[0160] Similarly, the lead wire R2 connected to the terminal 2B4 is led back from the folded portion 16 to the through hole 15a via the wiring holding portion 17a, the wiring holding portion 17g, and the wiring holding portion 17h.

[0161] Similarly, the lead wire R3 connected to the terminal 2A4 is led back from the folded portion 16 to the through hole 15b via the wiring holding portion 17b, the wiring holding portion 17c, and the wiring holding portion 17d.

[0162] Similarly, the lead wire R4 connected to the terminal 2A3 is led back from the folded portion 16 to the cutout 15c via the wiring holding portion 17b, the wiring holding portion 17c, the wiring holding portion 17d, the wiring holding portion 17e, and the wiring holding portion 17f.

[0163] Next, on the outside of the housing 3, the respective leads R1 to R4 are welded to the terminals 23 and 24. Lead R1 is welded to the terminal 2B3. Lead R2 is welded to the terminal 2B4. Lead R3 is welded to the terminal 2A4. Lead R4 is welded to the terminal 2A3.

[0164] After the soldering work is completed, air blowing or the like is performed to remove solder slag outside the housing 3 . Thus, solder slag or the like does not enter the interior of the housing 3 .

[0165] In this state, the motor 2A, the motor 2B, and the lead wires R1 to R4 attached to the holder 10 are accommodated in the housing 3 .

[0166] At this time, the anti-detachment parts 18a to 19b can be used to maintain the motor 2A, motor 2B, and retainer 10 in a non-detached state, so the layout of the motor 2A, motor 2B, and retainer 10 becomes easy, and the operability of storing them in the housing 3 at the same time is improved.

[0167] At the same time, leads R1 to R4 are fixed to retainer 10 via wiring retaining portions 17a to 17h, and can be maintained together with motor 2A, motor 2B, and retainer 10 without separation, so that they can be easily arranged, and the workability of simultaneously storing them in housing 3 is improved.

[0168] Furthermore, since the folded portion 16 is provided so as to cover the edge of the flange portion 2B5, the leads R1 to R4 are not damaged by the edge of the flange portion 2B5, and the leads R1 to R4 can be arranged more easily.

[0169] Next, first, the motor 2A serving as a reference is fixed to the housing 3 by one fixing screw 5A3 and two fixing screws 5A4. At this time, the holder 10 and the motor 2B are not fixed to the housing 3.

[0170] Thus, the position of the motor 2A can be used as a reference to accurately position the motor 2B relative to the housing 3. In addition, when the motor 2A is fixed, the leads R1 to R4 are fixed by the wiring holding portions 17a to 17h, so that the screw tightening operation is not hindered, and the workability can be improved.

[0171] Next, the motor 2B is precisely positioned using a predetermined jig. At this time, since the approximate position and posture of the motor 2B relative to the motor 2A are restricted by the retainer 10, a jig that can adjust the orientation of the drive shaft 2B1 only in the X direction is sufficient, and there is no need to prepare a jig of a special shape. Furthermore, since the position setting of the motor 2B is only in one direction, that is, the X direction, only the inter-axis distance can be finely adjusted, which can shorten the operation time and improve the workability.

[0172] After the motor 2B is positioned relative to the motor 2A fixed to the housing 3 , the motor 2B is fixed to the housing 3 by one fixing screw 5B3 and two fixing screws 5B4 . At this time, the holder 10 is not fixed to the housing 3 .

[0173] Thus, the motor 2B can be easily fixed to the housing 3 in a state where it is precisely positioned relative to the housing 3 using the position of the motor 2A as a reference.

[0174] Furthermore, since the four lead wires R1 to R4 are fixed to the holder 10 by the wire holding portions 17a to 17h, the lead wires R1 to R4 are prevented from moving inside the housing 3. Thus, the operating reliability of the drive device 1 can be improved.

[0175] In the present embodiment, in the fitting portion 12 of the motor 2A on the reference side, in order to center the motor 2A, four-sided press-fit portions 12a and four-sided press-fit portions 12b arranged in four equal parts at 90 degrees are provided on the inner circumferential surface of the fitting portion 12, and in the fitting portion 13 of the motor 2B on the slave side, two two-sided press-fit portions 13b facing each other are provided relative to the horizontal component of the meshing center line of the drive gear 21a and the reduction gear 7. When the motor 2 is fixed to the housing 3 using the fixing screws 53 and the fixing screws 54, the motor 2A on the reference side is initially screwed.

[0176] In the motor 2B on the slave side, the two two-sided press-in parts 13b are opposite to each other in the Y direction, so the movement is restricted only in the horizontal component direction of the meshing center line of the driving gear 21a and the speed reduction gear 7. Therefore, the motor 2B on the slave side only needs to adjust the horizontal component direction of the meshing center line of the gear on the body fixed by the clamp, so there is no need to restrict the position in two directions, so the clamp can be simplified.

[0177] That is, when the two motors 2 are fixed to the housing 3 using the fixing screws 53 and the fixing screws 54, a fitting portion 12 that can be pressed into and restrict the motor 2A on the reference side is provided on the retainer 10 before the screw fixing is performed, so that the position adjustment of the motor 2B on the subordinate side during the screw fixing is performed only on the horizontal component of the meshing center line of the gears, thereby enabling the gear meshing distance to be set with good precision and achieving simplification of the fixture.

[0178] Even when the edge of the flange portion 25 of the motor 2 is very sharp, the edge of the flange portion 25 can be covered by the folded portion 16. Therefore, in the lead-out portion 3a, even if the lead moves in the Z direction as the gasket is removed, the lead is prevented from contacting the edge of the flange portion 25, thereby preventing the lead coating from being damaged.

[0179] As a result, due to the improvement of operational efficiency, operational losses in production activities can be reduced, thus contributing to Goal 7 of the United Nations-led Sustainable Development Goals (SDGs) to "ensure access to affordable, reliable, sustainable and modern energy for all" and Goal 8 to "promote sustained, inclusive and sustainable economic growth, full and productive employment and decent work for all."

[0180] In the above embodiment, the motor 2 is described as a two-phase motor, but it may be a three-phase motor. In this case, the number of lead wires and the number of locations where the through holes are provided increase.

[0181] Furthermore, in the above embodiment, the configuration including two motors 2 is described, but a configuration including three or more motors may be used. In this case, the plurality of motors may be arranged at equal intervals in the circumferential direction of the reduction gear 7 .

[0182] Explanation of symbols

[0183] 1: Driving device (actuator)

[0184] 2.2A, 2B: Motor

[0185] 3: Shell

[0186] 7: Speed ​​reduction gear

[0187] 7a: Speed ​​reduction shaft

[0188] 8: Speed ​​reduction mechanism

[0189] 10: Retainer

[0190] 11: Base

[0191] 12: Fitting part (first fitting part)

[0192] 12a, 12b: Square press-fitting portion (first press-fitting portion)

[0193] 12h, 13h: Mosaic hole

[0194] 13: Fitting part (second fitting part)

[0195] 13b: Two-sided press-in portion (second press-in portion)

[0196] 14a, 14b, 15c: incision

[0197] 15a, 15b, 14c: Through holes

[0198] 16: Turnback

[0199] 17a, 17b, 17c, 17d, 17e, 17f, 17g, 17h: Wiring holding portion (hook)

[0200] 18a, 18b, 19a, 19b: Anti-slip part

[0201] 21, 2A1, 2B1: Drive shaft

[0202] 22: Bearing retainer (positioning fitting, bearing holder)

[0203] 2A2: Bearing retainer (first positioning protrusion)

[0204] 2B2: Bearing retainer (second positioning protrusion)

[0205] 23, 2A3, 2B3, 24, 2A4, 2B4: Terminal (power supply terminal)

[0206] 25, 2A5, 2B5: Flange

[0207] 53, 5A3, 5B3, 54, 5A4, 5B4: Fixing screw

[0208] 21a: Driving gear

[0209] C0, C01, C02: Axis

Claims

1. A driving device, characterized in that: include: case, A plurality of motors are housed in the housing with axes parallel to each other, and a holder for determining the relative positions of the plurality of motors, The plurality of motors are mounted on the holder.

2. The driving device according to claim 1, characterized in that: The holder includes a base portion and a plurality of engaging portions provided on the base portion so as to correspond to the plurality of motors, respectively. The fitting portion is fitted with a positioning fitting portion provided on the motor.

3. The driving device according to claim 2, characterized in that: The positioning engaging portion is a positioning convex portion provided on the motor. The fitting portion has a fitting hole in which the positioning protrusion of the motor is fitted into the inner peripheral surface.

4. The driving device according to claim 3, characterized in that: In the retainer, At least one first fitting portion among the plurality of fitting portions has a first press-in portion, which protrudes radially inward at at least three locations on the inner circumferential surface of the fitting hole and is pressed into a first positioning protrusion of a first motor among the plurality of motors. A second fitting portion different from the first fitting portion among the plurality of fitting portions has a second press-fit portion that protrudes radially inward at two locations on the inner circumferential surface of the fitting hole and is press-fitted into a second positioning protrusion of a second motor among the plurality of motors.

5. The driving device according to claim 4, characterized in that: In the retainer, The first press-fit portions are arranged at equal intervals in the circumferential direction of the first fitting portion. The second press-fit portions are arranged at equal intervals in a circumferential direction of the second fitting portion.

6. The driving device according to claim 5, characterized in that: In the retainer, The first press-fitting portion is disposed at two locations facing each other in a direction from the first fitting portion toward the second fitting portion and at two locations in a direction intersecting the two locations. The second press-fitting portions are disposed at two locations facing each other in a direction intersecting a direction from the first fitting portion toward the second fitting portion.

7. The driving device according to claim 1, characterized in that: The holder includes a plurality of anti-detachment portions that prevent the motor from detaching from the holder.

8. The driving device according to claim 7, characterized in that: The anti-detachment portion is an elastically deformable engaging piece that engages with the motor.

9. The driving device according to claim 3, characterized in that: The positioning protrusion of the motor is a bearing holder.

Images