motor

Abstract

To provide a motor that is easy to be assembled.SOLUTION: A motor includes a rotor 3, a stator 4, a housing 5 that houses the rotor 3 and the stator 4 and has an opening, and a cover 6 that closes at least a part of the opening, and the cover 6 includes a cover body 61, a sensor 62 facing the rotor 3, a fixing member 63 that fixes the sensor 62, and a connecting member 64 that connects the fixing member 63 to the cover body 61, and the connecting member 64 passes through the hole of the cover body 61.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a motor. [Background technology]

[0002] Conventionally, motors have been used as drive sources for various devices. Motors generally use sensors to detect the rotational position of the rotor. A motor using such a sensor is described in, for example, Patent Document 1.

[0003] However, the motor described in Patent Document 1 requires that the sensor be fixed to the mounting portion of the housing before the motor can be assembled. Therefore, when attaching the sensor, the tolerances for each step, such as when fixing the sensor to the mounting portion and when assembling the motor, overlap, making it difficult to improve assembly precision. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-204674 Summary of the Invention [Problem to be solved by the invention]

[0005] An example of an object of the present invention is to provide a motor that can be assembled with improved precision. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention employs the following measures: That is, a motor according to one aspect of the present invention includes a rotor, a stator, a housing that houses the rotor and the stator and has an opening, and a cover that closes at least a part of the opening, the cover having a cover body, a sensor facing the rotor, a fixing member that fixes the sensor, and a connecting member that connects the fixing member to the cover body, the connecting member passing through a hole in the cover body.

[0007] In the motor, the sensor preferably has a position detection element that detects the magnetic flux of the rotor. In this case, it is preferable that the sensor further has a connector, and that the position detection element and the connector are on the same plane.

[0008] In the motor, the connecting member is preferably a fastening member. In the motor, the connecting member preferably has a shaft portion and a flange portion. In this case, it is preferable that the minor axis of the hole is larger than the outer diameter of the shaft portion. In the motor, the hole is preferably an elongated hole. [Brief explanation of the drawings]

[0009] [Figure 1] 3 is a longitudinal cross-sectional view of the motor according to the first embodiment of the present invention, and is a cross-sectional view taken along line BB in FIG. 2. [Figure 2] 2 is a cross-sectional view of the motor according to the first embodiment of the present invention, taken along line AA in FIG. 1. FIG. [Figure 3] FIG. 2 is an enlarged longitudinal sectional view of a main part in FIG. [Figure 4] FIG. 2 is a perspective view of a cover in the motor according to the first embodiment of the present invention. [Figure 5] FIG. 2 is an exploded perspective view of a cover in the motor according to the first embodiment of the present invention. [Figure 6] FIG. 6 is an enlarged longitudinal cross-sectional view of a main portion of a motor according to a second embodiment of the present invention. [Figure 7] FIG. 10 is a perspective view of a cover in a motor according to a second embodiment of the present invention. [Figure 8] FIG. 10 is an exploded perspective view of a cover in a motor according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] [First embodiment] A motor 1 according to a first embodiment of the present invention will be described below with reference to FIGS. Fig. 1 is a longitudinal cross-sectional view of motor 1 according to this embodiment. Fig. 2 is a transverse cross-sectional view of motor 1 according to this embodiment. Fig. 1 corresponds to the cross-sectional view taken along line BB in Fig. 2, and Fig. 2 corresponds to the cross-sectional view taken along line AA in Fig. 1. Motor 1 is an inner rotor type motor and a spoke-type IPM motor.

[0011] In a spoke-type IPM motor, the cross sections of the multiple magnets appear as rectangles in a cross section of the rotor perpendicular to the motor's rotation axis. The magnets are arranged radially so that the longitudinal direction of the rectangle coincides with the radial direction of the rotor. In a spoke-type IPM motor, the surface of each magnet facing the long side of the rectangle serves as a magnetic pole. Furthermore, the opposing magnetic pole faces of adjacent magnets in the circumferential direction of the rotor have the same polarity.

[0012] As shown in Figure 1, motor 1 has a shaft 2 that serves as a rotating axis, a rotor 3, a stator 4, a housing 5 that houses rotor 3 and stator 4 and has an opening, and a cover 6 that covers at least a portion of the opening of housing 5.

[0013] The housing 5 accommodates some of the components of the motor 1, such as the rotor 3 and the stator 4. The housing 5 has a tubular portion 51, a bottom portion 52, and a flange portion 53. The tubular portion 51 is cylindrical and has an end portion on one side (hereinafter referred to as the "bottom side") and an end portion on the other side (hereinafter referred to as the "opening side"). The flange portion 53 is connected to the end portion on the opening side of the tubular portion 51. The bottom portion 52 is connected to the end portion on the bottom side of the tubular portion 51. The bottom portion 52 has a bottom surface portion 52a and a protruding portion 52b.

[0014] The bottom surface portion 52a is an annular flat plate portion that covers the bottom end of the cylindrical portion 51. The protruding portion 52b is a cylindrical portion that is connected to the center of the bottom surface portion 52a and protrudes toward the opening side of the cylindrical portion 51. A bearing 71 is fixed to the inside of the protruding portion 52b by press fitting or the like. Note that a circular hole having an inner diameter smaller than the inner diameter of the protruding portion 52b may be provided in the center of the bottom surface portion 52a.

[0015] The shaft 2 is generally cylindrical and has two ends 2a and 2b. Near the end 2a, the shaft 2 is rotatably supported relative to the cover 6 by a bearing 72 (described later). Near the end 2b, the shaft 2 is rotatably supported relative to the housing 5 by a bearing 71. Thus, the shaft 2 is rotatably fixed to the housing 5 via the bearing 71 and to the cover 6 via the bearing 72.

[0016] An end 2a of the shaft 2 protrudes from the cover 6. The rotational force can be output from the end 2a of the shaft 2. The shaft 2 is fixed to the rotor 3, and when the rotor 3 rotates due to the electromagnetic interaction between the stator 4 and the rotor 3, the shaft 2 rotates together with the rotor 3.

[0017] The stator 4 is made up of a stator core 41 and coils 42. The stator core 41 is a laminate of magnetic material such as silicon steel plates. The stator core 41 is made up of an annular portion 44 arranged coaxially with the shaft 2, and a plurality of (e.g., 12) tooth portions 43, which are magnetic pole portions formed to extend from the annular portion 44 toward the shaft 2. The outer periphery of the annular portion 44 is fixed to the inner circumferential surface of a cylindrical portion 51 of the housing 5, thereby fixing the stator 4 to the housing 5. The coils 42 are wound around each of the plurality of tooth portions 43. The stator core 41 and the coils 42 are insulated from each other by an insulator 45 made of an insulating material.

[0018] The rotor 3 has a rotor core 31 and a plurality of magnets 32. The rotor core 31 is formed by laminating a plurality of magnetic bodies. The rotor core 31 has a generally cylindrical shape. A plurality of (e.g., 14) slits are radially formed on the outer peripheral surface of the rotor core 31, penetrating from one end of the rotor core 31 to the other end in the axial direction. The magnets 32 have a rectangular parallelepiped shape and are fixed inside the slits. The number of magnets 32 matches the number of the slits.

[0019] In a cross section of the rotor 3 perpendicular to the axial direction, the cross sections of the multiple magnets 32 appear as rectangles. The longitudinal direction of the cross sections of the multiple magnets 32 coincides with the radial direction of the rotor 3. The surfaces of the multiple magnets 32 on the long side of the cross section form magnetic poles. Furthermore, in the circumferential direction of the rotor 3, the opposing magnetic pole faces of adjacent magnets 32 have the same polarity. The inner peripheral surface of the rotor core 31 is fixed to the shaft 2.

[0020] A sensor 62 is disposed inside the motor 1, facing the rotor 3 in the axial direction. The sensor 62 is used to detect the rotational position of the rotor 3. FIG. 3 shows an enlarged longitudinal cross-sectional view of the sensor 62 and its vicinity. FIG. 4 is a perspective view of the cover 6 of the motor 1, with the interior of the motor 1 facing upward. FIG. 5 is an exploded perspective view of the cover 6 of the motor 1.

[0021] As shown in Figures 3 to 5, the cover 6 has a cover main body 61, a sensor 62 facing the rotor 3, a fixing member 63 for fixing the sensor 62, and a connecting member 64 for connecting the fixing member 63 to the cover main body 61. The cover body 61 has a flat plate portion 61a, a protruding portion 61b, and a flange portion 61c.

[0022] The flat plate portion 61a is annular and has a hole 61d through which the shaft 2 passes, and has a surface on one side (hereinafter referred to as the "inner surface") and a surface on the other side (hereinafter referred to as the "outer surface"). The inner surface is the surface that faces the housing 5 (the interior side of the motor 1) when the cover main body 61 is fixed to the housing 5.

[0023] The protruding portion 61b is a cylindrical portion that is connected to the inner surface of the flat plate portion 61a and protrudes toward the inside of the motor 1. A bearing 72 is fixed to the inside of the protruding portion 61b by press-fitting or the like. The flange portion 61c is provided on the outer periphery of the flat plate portion 61a. The flange portion 53 of the housing 5 and the flange portion 61c of the cover main body 61 are fixed together by fastening or the like, so that at least a portion of the opening of the housing 5 is closed by the cover 6.

[0024] The hole 61d is a circular hole provided in the flat plate portion 61a. The diameter of the hole 61d is smaller than the inner diameter of the protrusion 61b. The axes of the flat plate portion 61a, the protrusion 61b, and the hole 61d coincide with the rotation axis of the motor 1 (the axis of the shaft 2). The shaft 2 is rotatably supported by a bearing 72 near the end 2a relative to the cover 6. The end 2a of the shaft 2 is inserted into the hole 61d and protrudes from the cover 6.

[0025] The cover main body 61 has two holes 66 penetrating the flat plate portion 61a. The holes 66 are located near and on the outer periphery of the portion of the flat plate portion 61a where the protrusions 61b are connected. In this embodiment, the holes 66 are arc-shaped elongated holes that share an axis with the hole portion 61d. When connecting the fixing member 63 to the cover main body 61, the connecting member 64 is inserted into the holes 66, and the connecting member 64 passes through the holes 66. Note that the term "passing through" here refers to the state in which the connecting member 64 is inserted into the holes 66, with a portion of the connecting member 64 existing inside the holes 66.

[0026] The fixing member 63 is made of resin. The fixing member 63 has an arc-shaped flat plate portion 63a, two protruding portions 63b, and two connecting portions 63c. The thickness of the flat plate portion 63a is thinner (lower than the protruding height) than the thickness of the protruding portion 61b of the cover main body 61. The protruding portions 63b are portions where the thickness of the flat plate portion 63a is increased, and are provided at both ends of the arc of the flat plate portion 63a. The connecting portions 63c are portions that protrude from the flat plate portion 63a in the same direction as the protruding portions 63b. The two connecting portions 63c are provided on the flat plate portion 63a between the two protruding portions 63b.

[0027] The fixing member 63 is connected to the cover body 61 by a connecting member 64. The fixing member 63 is arranged along the outer periphery of the protruding portion 61b of the cover body 61. In this embodiment, the connecting member 64 is a fastening member having a shaft portion 64a and a flange portion 64b, such as a tapping screw. The connecting member 64 is inserted into a hole 66 of the cover body 61 from the outside of the flat portion 61a of the cover body 61, via a lock washer 65 if necessary, and then fixed to the protruding portion 63b of the fixing member 63.

[0028] The sensor 62 has a substrate 62a, a position detection element 62b, and a connector 62c. The substrate 62a is a flat, arc-shaped insulating member corresponding to the flat plate portion 63a of the fixing member 63. A printed wiring circuit (not shown) is formed on the substrate 62a. The substrate 62a has two holes (not shown). The two connection portions 63c of the fixing member 63 are inserted into the two holes of the substrate 62a, respectively, and are fixed to the substrate 62a by thermal resin caulking or the like.

[0029] The position detection element 62b is a Hall element, a Hall IC, or the like, and detects the rotational position of the rotor 3 based on fluctuations in magnetic flux that accompany the rotation of the rotor 3. The position detection element 62b is provided on the flat surface of the substrate 62a facing the rotor 3, and is surface-mounted on the printed wiring circuit. As shown in Figures 4 and 5, a plurality of position detection elements 62b may be provided.

[0030] The connector 62c is electrically connected to the printed wiring circuit. The connector 62c is provided with a connection socket 62ca that opens in a direction parallel or approximately parallel to the plane of the substrate 62a, and is connectable to a wiring-side connector (hereinafter referred to as the "wiring-side connector") 67 shown in Fig. 3. As shown in Fig. 3, the position detection element 62b is electrically connected to an external control device (not shown) via the printed wiring circuit, the connector 62c, the wiring-side connector 67, and lead wires 68.

[0031] The connector 62c is disposed on the same plane as the position detecting element 62b of the substrate 62a, so that the position detecting element 62b and the connector 62c are on the same plane. Here, "on the same plane" means that the position detecting element 62b and the connector 62c are connected to the same plane of the substrate 62a either directly or via a member, so that the position detecting element 62b and the connector 62c are on the same plane of the substrate 62a.

[0032] In the motor 1 according to this embodiment, when a current is applied to the coil 42 of the stator 4, a magnetic field is generated. The movement of the magnetic field attracts the magnet 32 ​​of the rotor 3, causing the rotor 3 to rotate. The rotational position of the rotor 3 is detected by the position detection element 62b and transmitted to an external control device via the connector 62c, the wiring-side connector 67, and the lead wires 68.

[0033] In the motor 1 according to this embodiment, a fixing member 63 to which a sensor 62 is fixed is fixed to the cover body by a connecting member 64. The connecting member 64 fixes the fixing member 63 from the outside of the flat plate portion 61a of the cover body 61 through a hole 66. Therefore, after assembling the other parts of the motor 1, the position of the sensor 62 can be determined based on the position of the teeth portion 43 of the stator 4, and the fixing member 63 can be finally fixed. Because the sensor 62 can be finally positioned in the motor 1 without considering the tolerances of each assembly step, assembly precision can be improved and assembly is easy.

[0034] In the motor 1 according to this embodiment, the connecting member 64 is a fastening member, which allows for repeated positioning of the sensor 62. Furthermore, because the hole 66 in the cover body 61 is an elongated, arc-shaped hole, the insertion position of the connecting member 64 has a high degree of freedom, allowing for flexible adjustment of the fixing position of the fixing member 63. Furthermore, in the motor 1 according to this embodiment, the cover body 61 does not have a mounting portion for the sensor 62, but instead has an independent fixing member 63 interposed therebetween. Because the fixing member 63 is made of resin, the weight of the motor 1 can be reduced.

[0035] Furthermore, in the motor 1 according to this embodiment, the position detection element 62b and the connector 62c are located on the same plane. Therefore, there is no need to provide a space to accommodate the connector 62c between the circuit board 62a and the flat plate portion 61a of the cover body 61, and as shown in FIG. 3, the sensor 62 can be attached closer to the flat plate portion 61a of the cover body 61. This allows the motor 1 to be made more compact. Furthermore, as shown in FIG. 3, sufficient space can be secured for wiring the lead wires 68 extending from the wiring-side connector 67, simplifying wiring.

[0036] [Second embodiment] Next, a motor 101 according to a second embodiment of the present invention will be described with reference to Figs. 6 to 8. Fig. 6 shows an enlarged vertical cross-sectional view of a sensor 162 and its vicinity. Fig. 7 is a perspective view of the cover 106 of the motor 101, with the interior of the motor 101 facing upward. Fig. 8 is an exploded perspective view of the cover 106 of the motor 101.

[0037] In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted. In the motor 101 according to the second embodiment, the configuration of the cover 106 is different from the configuration of the cover 6 of the motor 1 according to the first embodiment, but the other configurations are the same as those of the first embodiment.

[0038] As shown in Figures 6 to 8, the cover 106 has a cover main body 161, a sensor 162 facing the rotor 3, a fixing member 163 for fixing the sensor 162, and a connecting member 64 for connecting the fixing member 163 to the cover main body 161. The cover body 161 has a flat plate portion 161a, a protruding portion 61b, and a flange portion 61c.

[0039] The flat plate portion 161a is annular and has a hole 61d through which the shaft 2 passes, and has a surface on one side (hereinafter referred to as the "inner surface") and a surface on the other side (hereinafter referred to as the "outer surface"). The inner surface is the surface that faces the housing 5 (the interior side of the motor 101) when the cover main body 161 is fixed to the housing 5.

[0040] The cover main body 161 has two holes 166 penetrating the flat plate portion 161a. The holes 166 are located near and on the outer periphery of the portion of the flat plate portion 161a where the protrusions 61b are connected. In this embodiment, the holes 166 are circular holes. When connecting the fixing member 163 to the cover main body 161, the connecting member 64 is inserted into the holes 166, and the connecting member 64 passes through the holes 166. Note that "passing through" here refers to the state where the connecting member 64 is inserted into the holes 166, and as a result, a portion of the connecting member 64 is present inside the holes 166. The diameter of the holes 166 is larger than the outer diameter of the shaft portions 64a of the connecting member 64, and is preferably 1.1 times larger.

[0041] The fixing member 163 is made of resin and has a plate portion 163a curved in an arc shape and two protrusions 163b. The protrusions 163b are portions of the plate portion 163a where the thickness increases toward the outside in the radial direction of the arc, and are provided at both ends of the arc of the plate portion 163a.

[0042] The fixing member 163 is connected to the cover body 161 by a connecting member 64. The fixing member 163 is arranged along the outer periphery of the protruding portion 61b of the cover body 161. The connecting member 64 is inserted into a hole 166 of the cover body 161 from the outside of the flat plate portion 161a of the cover body 161, via a lock washer 65 if necessary, and then fixed to the protruding portion 163b of the fixing member 163.

[0043] The sensor 162 includes a substrate 162a, a position detection element 162b, and a connector 162c. The substrate 162a is an arc-shaped, flat, insulating member. The curvature of the inner peripheral surface of the arc-shaped substrate 162a is approximately equal to the curvature of the inner peripheral surface of the plate portion 163a of the fixing member 163. A printed wiring circuit (not shown) is formed on the substrate 162a. The substrate 162a has two elongated holes 162aa. The substrate 162a is fixed to the protruding portion 163b of the fixing member 163 via the elongated holes 162aa by fastening members 162ab.

[0044] The position detection element 162b is a Hall element, a Hall IC, or the like, and detects the rotational position of the rotor 3 based on fluctuations in magnetic flux that accompany the rotation of the rotor 3. The position detection element 162b is provided on the flat surface of the substrate 162a facing the rotor 3, and is surface-mounted on the printed wiring circuit. As shown in FIGS. 7 and 8, a plurality of position detection elements 162b may be provided.

[0045] The connector 162c is electrically connected to the printed wiring circuit. The connector 162c is located on a plane of the substrate 162a that is different from the plane on which the position detection element 162b is located. The connector 162c is located in the space between the substrate 162a and the flat plate portion 161a of the cover main body 161. The connector 162c is provided with a connection socket (not shown) that opens toward the flat plate portion 161a of the cover main body 161, and is connectable to the wiring-side connector 67 shown in FIG. 6. As shown in FIG. 6, the position detection element 162b is electrically connected to an external control device (not shown) via the printed wiring circuit, the connector 162c, the wiring-side connector 67, and lead wires 68.

[0046] In the motor 101 according to this embodiment, a fixing member 163 to which a sensor 162 is fixed is fixed to the cover body 161 by a connecting member 64. The connecting member 64 fixes the fixing member 163 from the outside of the flat plate portion 161a of the cover body 161 through a hole 166. Therefore, after assembling other parts of the motor 101, the position of the sensor 162 can be determined based on the position of the teeth portion 43 of the stator 4, and the fixing member 163 can be finally fixed. Because the sensor 162 can be finally positioned in the motor 101 without considering the tolerances of each assembly step, assembly precision can be improved and assembly is easy.

[0047] In the motor 101 according to this embodiment, the connecting member 64 is a fastening member, which allows repeated positioning of the sensor 162. Furthermore, because the diameter of the hole 166 in the cover body 161 is larger than the outer diameter of the shaft portion 64a of the connecting member 64, there is a degree of freedom in the insertion position of the connecting member 64, and therefore the fixing position of the fixing member 163 can be adjusted. Furthermore, in the motor 101 according to this embodiment, the cover body 161 does not have a mounting portion for the sensor 162, but instead has an independent fixing member 163 interposed therebetween. Because the fixing member 163 is made of resin, the weight of the motor 101 can be reduced.

[0048] Furthermore, in motor 101 according to this embodiment, sensor 162 is fixed to protrusion 163b of fixing member 163 by fastening member 162ab via elongated hole 162aa in substrate 162a. This increases the degree of freedom in the fixing position of sensor 162 relative to fixing member 163, allowing the position of sensor 162 to be flexibly adjusted.

[0049] [Other embodiments] Although the embodiments of the present invention have been described above, the present invention is not limited to these and can be modified as appropriate within the scope of the technical idea of ​​the invention.

[0050] In the first embodiment of the present invention, the hole 66 of the cover body 61 is an elongated hole having an arc shape, but it may be a circular hole as in the second embodiment. In that case, as in the second embodiment, the diameter of the hole 66 is larger than the outer diameter of the shaft portion 64a of the connecting member 64, preferably by 1.1 times or more. Conversely, in the second embodiment of the present invention, the hole 166 of the cover body 61 is a circular hole, but it may be an arc-shaped elongated hole similar to the first embodiment.

[0051] In the first and second embodiments of the present invention, the holes 66, 166 of the cover main body 61, 161 are arc-shaped elongated holes or circular holes, but holes of other shapes may also be used. In this case, the minor axis of the holes 66, 166 is preferably larger than the outer diameter of the shaft portion 64a of the connecting member 64, and more preferably 1.1 times larger.

[0052] In the first and second embodiments of the present invention, the fixing members 63, 163 are made of resin, but they may be made of a material other than resin, such as metal. By making them of metal, the strength can be improved. In the first embodiment of the present invention, the connection portion 63c of the fixing member 63 is inserted into a hole in the substrate 62a and fixed to the substrate 62a by thermal resin crimping or the like, but the fixing member 63 may not have the connection portion 63c and the substrate 62a may be fixed to the fixing member 63 by a fastening member.

[0053] In the second embodiment of the present invention, the substrate 162a is fixed to the protrusion 163b of the fixing member 163 by the fastening member 162ab via the elongated hole 162aa, but the elongated hole 162aa may simply be a circular hole. Also, instead of using the fastening member 162ab, a connecting portion similar to that in the first embodiment may be provided on the fixing member 163, which may be inserted into the hole in the substrate 162a and fixed by thermal resin caulking or the like. In the first and second embodiments of the present invention, the substrates 62a and 162a may not be provided with holes, and may be fixed to the fixing members 63 and 163 with adhesive or the like.

[0054] In the first and second embodiments of the present invention, the connecting member 64 is a fastening member having a shaft portion 64a and a flange portion 64b, but the connecting member 64 may also be a protrusion provided on the fixing member 63, 163. In that case, the protrusion protrudes from the fixing member 63, 163 toward the flat plate portion 61a, 161a of the cover main body 61, 161, and is inserted into the hole 66, 166 of the cover main body 61, 161. Thereafter, the fixing member 63, 163 is fixed to the cover main body 61, 161 by thermal resin caulking. In this case, although it is no longer possible to repeatedly position the sensors 62, 162, the positioning of the sensors 62, 162 can be performed after assembling the other parts of the motor 1, 101, so the assembly accuracy of the motor 1, 101 can still be improved and it is easy to assemble.

[0055] In the first and second embodiments of the present invention, the motors 1, 101 are spoke-type IPM motors, but motors of other structures may also be used.Moreover, the motors 1, 101 may also be motors of other structures, such as SPM motors or brushless motors, as long as they have a sensor facing the rotor.

[0056] In the first and second embodiments of the present invention, the motor 1, 101 is an inner rotor motor, but an outer rotor motor may also be used. In this case, the hole in the cover body and the connection position of the fixing member should be positioned so that the sensor can detect the magnetic flux of the rotor.

[0057] In the first and second embodiments of the present invention, the sensors 62 and 162 are sensors having position detection elements 62b and 162b, but may be sensors other than sensors having position detection elements, such as temperature sensors, speed sensors, acceleration sensors, vibration sensors, and torque sensors.

[0058] In the second embodiment of the present invention, hole 166 is a circular hole having a diameter larger than the outer diameter of shaft portion 64a of connecting member 64, but it may also be a circular hole having a diameter approximately equal to the outer diameter of shaft portion 64a of connecting member 64. Even if the hole is a circular hole having a diameter approximately equal to the outer diameter of shaft portion 64a, sensors that require precision can be attached after other parts of motor 101 have been assembled, which improves assembly precision and also simplifies assembly.

[0059] In addition, those skilled in the art can appropriately modify the motor of the present invention in accordance with conventionally known knowledge. As long as such modifications still comprise the configuration of the present invention, they are of course included in the scope of the present invention. [Explanation of symbols]

[0060] 1...motor, 2...shaft, 2a, 2b...end, 3...rotor, 31...rotor core, 32...magnet, 4...stator, 41...stator core, 42...coil, 43...teeth portion, 44...annular portion, 45...insulator, 5...housing, 51...tubular portion, 52...bottom, 52a...bottom surface portion, 52b...protruding portion, 53...flange portion, 6...cover, 61...cover main body, 61a...flat plate portion, 61b...protruding portion, 61c...flange portion, 61d...hole portion, 62...sensor, 62a...board, 62b...position detection element, 62c...connector, 6 3...fixing member, 63a...flat plate portion, 63b...protruding portion, 63c...connecting portion, 64...connecting member, 64a...shaft portion, 64b...flange portion, 65...lock washer, 66...hole, 67...wiring side connector, 68...lead wire, 71, 72...bearing, 101...motor, 106...cover, 161...cover body, 161a...flat plate portion, 162...sensor, 162a...board, 162aa...long hole, 162ab...fastening member, 162b...position detecting element, 162c...connector, 163...fixing member, 163a...plate portion, 163b...protruding portion, 166...hole

Claims

1. A rotor, a stator; a housing that houses the rotor and the stator and has an opening; a cover that closes at least a portion of the opening, The cover is The cover body, a sensor facing the rotor; a fixing member for fixing the sensor; a connecting member that connects the fixing member to the cover body, the sensor includes a position detection element that detects the magnetic flux of the rotor, a substrate, and a connector; the fixing member includes a protrusion, the substrate is fixed to the protrusion; the connector is disposed in a space between the board and the cover body, The connector has a connection port located inside the housing. The connecting member passes through a hole in the cover body.

2. A rotor, a housing that houses the rotor and has an opening; a cover that closes a part of the opening, The cover is The cover body, a sensor facing the rotor; a fixing member for fixing the sensor; a connecting member that connects the fixing member to the cover body, the sensor includes a position detection element that detects the magnetic flux of the rotor, a substrate, and a connector; the fixing member includes a protrusion, the substrate is fixed to the protrusion; the connector is disposed in a space between the board and the cover body, The connector has a connection port located inside the housing. The connecting member passes through a hole in the cover body.

3. A motor as described in claim 1 or 2, wherein the position detection element and the connector are located on the same plane.

4. The motor according to claim 1 , wherein the connecting member is a fastening member.

5. The motor according to claim 1 , wherein the connecting member has a shaft portion and a flange portion.

6. The motor according to claim 5 , wherein a minor axis of the hole is larger than an outer diameter of the shaft portion.

7. The motor according to claim 1 , wherein the hole is an elongated hole.

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