Motor

Abstract

To provide a motor capable of easily temporarily holding a winding and improving work efficiency.SOLUTION: A motor includes: a terminal having a slit to which a winding drawn from a coil is crimped; and a terminal holder that holds the terminal. The terminal holder includes: a housing groove formed between a first side wall and a second side wall disposed at a predetermined interval in a width direction orthogonal to an extending direction of the winding and configured to house the winding; a rib provided at a part of the first side wall in the extending direction and configured to reduce a dimension of the housing groove in the width direction; and an engagement projection provided on a second side wall side at a position deviated from the rib in the extending direction and configured to engage the winding housed in the housing groove.SELECTED DRAWING: Figure 12

Description

[Technical Field]

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

[0002] In recent years, efforts have been made to promote the Sustainable Development Goals (2030 Agenda for Sustainable Development, adopted at the United Nations Summit on September 25, 2015, hereafter referred to as "SDGs"). Accordingly, technologies that aim to reduce waste and defective products in order to ensure sustainable production and consumption patterns have become well known.

[0003] Conventionally, there has been known a motor that includes a terminal to which the lead portions of the winding drawn from the stator coil are crimped and a terminal holder that holds the terminal in order to connect the lead portions of the winding drawn from the stator coil to a circuit board. For example, in the motor described in Patent Document 1, the terminal has a plurality of slits to which the lead portions are crimped, and the terminal holder has a plurality of guide grooves (accommodating grooves) that guide the lead portions, and with the lead portions temporarily held in the plurality of guide grooves, the lead portions are crimped into the slits of the terminal and the terminal is held in the terminal holder.

[0004] The terminal holder has guide grooves with ribs on one or both sides to temporarily hold the lead parts. The lead parts are temporarily held in the guide grooves by being press-fitted between the ribs or between the side surfaces of the guide grooves and the ribs. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2022 / 102440 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the motor described in Patent Document 1, when the lead portions are temporarily held in the multiple guide grooves, a press-fit load must be applied to the lead portions to insert them into the guide grooves. The windings are wound around the stator core while applying tension using a winding machine to form the coils, and the wire diameter varies depending on the tension applied when forming the coils. As a result, the load and press-fit depth required to press-fit the lead portions of the windings also vary depending on the wire diameter. While it is preferable to automatically press-fit the lead portions into the guide grooves using a forming machine or other machine, if the machine's press-fit load or press-fit depth is insufficient, manual work by an operator is required, which is inefficient.

[0007] Furthermore, when multiple leads are temporarily held in one terminal holder at the same time, the guide groove may become deformed when the leads are pressed into it. When the lead is pressed into the guide groove and the width of the guide groove expands, the width of the adjacent guide groove narrows. This makes it difficult for the machine to insert the lead into the guide, and may require the work to be redone.

[0008] An object of the present invention is to provide a motor that can easily temporarily hold windings and improve work efficiency. [Means for solving the problem]

[0009] In order to achieve the above object, the motor of the present invention comprises a terminal having a slit into which a winding drawn out from a coil is crimped, and a terminal holder for holding the terminal, wherein the terminal holder is characterized by comprising an accommodating groove formed between a first side wall and a second side wall arranged at a predetermined interval in a width direction perpendicular to the extension direction of the winding, for accommodating the winding, a rib provided on a part of the first side wall in the extension direction to reduce the width dimension of the accommodating groove, and a locking protrusion provided on the second side wall at a position offset from the rib in the extension direction to lock the winding accommodated in the accommodating groove. [Effects of the Invention]

[0010] According to the present invention, it is possible to easily temporarily hold the lead portions, thereby improving the efficiency of the work and the yield rate. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a vertical cross-sectional view of a motor according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view of the front side of the motor, showing the configuration of the motor with the rotor removed. [Figure 3] FIG. 2 is a perspective view of the rear side of the motor, showing the configuration of the motor with the driver case and rotor removed. [Figure 4] FIG. [Figure 5] FIG. 2 is a perspective view of the periphery of a terminal and a terminal holder. [Figure 6] FIG. [Figure 7] FIG. 10 is a perspective view showing a state before the lead portions of the winding are inserted into the receiving grooves of the terminal holder. [Figure 8] FIG. 10 is an enlarged explanatory view of the periphery of the receiving groove. [Figure 9] 10 is an explanatory diagram showing the dimensional relationship between the receiving groove, the rib, and the locking protrusion. FIG. [Figure 10] 1A is an explanatory view showing a state before the lead portion of the winding is inserted into the receiving groove of the terminal holder, and FIG. 1B is an explanatory view showing a state after the lead portion is inserted into the receiving groove of the terminal holder, seen from the longitudinal direction of the receiving groove. [Figure 11] 1A is an explanatory view showing a state before the lead portion of the winding is inserted into the receiving groove of the terminal holder, and FIG. 1B is an explanatory view showing a state after the lead portion is inserted into the receiving groove, viewed from the depth direction of the receiving groove. [Figure 12] 1A is an explanatory view showing a state before a terminal is crimped onto a lead portion, and FIG. 1B is an explanatory view showing a state after crimping, as viewed from the longitudinal direction of a receiving groove. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, as one aspect of a motor according to an embodiment of the present invention, a motor mounted on a vehicle such as an automobile to drive a power sliding door, a fan device, an electric hydraulic pump, etc. will be described.

[0013] [Overall configuration of Motor 2] The configuration of the motor 2 will be described with reference to Figures 1 and 2. Figure 1 is a vertical cross-sectional view of the motor 2. Figure 2 is a perspective view of the front side of the motor 2, showing the configuration of the motor 2 with the rotor 23 removed.

[0014] As shown in FIGS. 1 and 2, the motor 2 is a so-called "mechanically integrated" electric motor that includes an outer rotor brushless motor 11 and a substrate 13 on which a driver circuit 12 is mounted.

[0015] In addition to the brushless motor 11, the driver circuit 12, and the board 13, the motor 2 includes a motor bracket 14, a driver case 15, a terminal holder 16 (see FIG. 4), terminals 17A to 17C (see FIG. 4), and a connector unit 18.

[0016] Brushless motor 11 is supported by motor bracket 14. Brushless motor 11 is disposed on one side (front side) in the thickness direction of motor bracket 14. Driver case 15 is fastened to the other side (back side) in the thickness direction of motor bracket 14 with a plurality of screws.

[0017] In addition, a connector unit 18, which combines two connectors to which an external harness is connected, is attached to the end of the motor bracket 14. The brushless motor 11, driver circuit 12, and connector unit 18 are electrically connected.

[0018] As shown in FIG. 1, brushless motor 11 has a shaft 21, a plurality of bearings 22 provided on the outer periphery of shaft 21, a rotor 23 rotatably supported around the axis of shaft 21 via bearings 22, and an annular stator 24 fixed to rotor 23 at a predetermined radial distance.

[0019] The shaft 21 is a fixed shaft fixed to the surface side of the motor bracket 14. In the following description of the components of the motor 2, the axial direction of the shaft 21 will be simply referred to as the "axial direction," the radial direction about the axis of the shaft 21 will be simply referred to as the "radial direction," and the circumferential direction about the axis of the shaft 21 will be simply referred to as the "circumferential direction."

[0020] The rotor 23 has a plurality of permanent magnets 231 arranged at equal intervals in the circumferential direction so as to surround the outer periphery of the stator 24, and a rotor yoke 232 that supports the plurality of permanent magnets 231 and is rotatably supported on the shaft 21.

[0021] Rotor yoke 232 is disposed on the surface side of motor bracket 14 so as to be concentric with the axis of shaft 21. Rotor yoke 232 is rotatably supported on shaft 21 via a plurality of bearings 22. Rotor yoke 232 further includes an outer peripheral wall 232A, an inner peripheral wall 232B, and a connecting wall 232C.

[0022] The outer peripheral wall 232A has a cylindrical outer shape. The outer peripheral wall 232A is disposed radially outward of the stator 24. The inner peripheral surface of the outer peripheral wall 232A supports a plurality of permanent magnets 231. In other words, the plurality of permanent magnets 231 are fixed to the inner peripheral surface of the outer peripheral wall 232A at predetermined intervals in the circumferential direction.

[0023] The inner circumferential wall 232B has a cylindrical outer shape and is disposed radially inward of the stator 24. The inner circumferential wall 232B is rotatably supported by the shaft 21 via a plurality of bearings 22.

[0024] The connecting wall 232C has a disk-shaped outer shape. The connecting wall 232C connects one axial end of the outer circumferential wall 232A and one axial end of the inner circumferential wall 232B. The connecting wall 232C is disposed on the opposite side of the stator 24 from the motor bracket 14. The connecting wall 232C is disposed opposite the stator 24 with a predetermined gap therebetween in the axial direction.

[0025] [Configuration of Stator 24] The stator 24 is housed in a space surrounded by the outer peripheral wall 232A, the inner peripheral wall 232B, the connecting wall 232C, and the surface of the motor bracket 14. The stator 24 is fixed to the surface side of the motor bracket 14, radially inward of the multiple permanent magnets 231. The stator 24 faces the multiple permanent magnets 231 across a predetermined radial gap.

[0026] 2, the stator 24 has a cylindrical stator core 241, insulating stator insulators 242 attached to both axial sides of a plurality of teeth protruding radially outward from the stator core 241, and a coil 243 wound with a wire on the stator insulator 242. The coil 243 is a conductive wire and is formed from, for example, a copper wire.

[0027] The stator 24 generates a magnetic field when a current flows through the coil 243. Then, the rotor yoke 232 rotates around the axis of the shaft 21 due to attractive and repulsive forces generated between the magnetic field generated by the coil 243 and the plurality of permanent magnets 231.

[0028] The driver circuit 12 controls the generation of a magnetic field by the multiple coils 243. The driver circuit 12 is composed of multiple electronic components (e.g., transistors, diodes, resistors, etc.) surface-mounted on the surface of the substrate 13 facing the motor bracket 14. Note that the electronic components that make up the driver circuit 12 are not arranged on the back side of the substrate 13 facing the driver case 15.

[0029] [Motor bracket 14 configuration] Fig. 3 is a perspective view of the rear side of the motor 2, showing the configuration of the motor 2 without the driver case 15 and the rotor 23. Fig. 4 is an exploded perspective view of the components arranged on the rear side of the motor bracket 14.

[0030] As shown in Figures 3 and 4, the board 13 is fastened to the motor bracket 14 by a plurality of screws 25. A terminal holder 16 is provided on the back side of the motor bracket 14 (the side facing the board 13). The motor bracket 14 has an opening 14A. The opening 14A penetrates from the front side to the back side of the motor bracket 14, allowing lead portions 244 of the windings forming the coil 243 to be drawn out to the back side of the motor bracket 14. The lead portions 244 have elasticity and are elastically deformed when inserted into the housing groove 36 described below.

[0031] [Terminal 17A-17C Configuration] Terminals 17A to 17C electrically connect driver circuit 12 and coils 243. Brushless motor 11 has three terminals 17A to 17C to supply three-phase (U-phase, V-phase, and W-phase) power to multiple coils 243. In other words, brushless motor 11 is a three-phase AC motor. In this embodiment, brushless motor 11 has a total of 12 coils 243, four for each phase.

[0032] 5, the terminals 17A to 17C are made of a conductive metal, and have a main body 26 and a terminal portion 27 integrally formed therewith. The terminals 17A to 17C are held by holding portions 16A to 16C of the terminal holder 16.

[0033] As shown in Fig. 6, main body 26 has a generally U-shaped cross section and includes two mating pieces 26A and 26B. Mating pieces 26A and 26B mate with mating grooves 37A and 37B (see Fig. 7) of terminal holder 16, which will be described later. Mating pieces 26A and 26B are arranged parallel to each other. Note that Fig. 6 illustrates the configuration of terminal 17A, but terminals 17B and 17C have the same configuration as terminal 17A.

[0034] Fitting pieces 26A and 26B each have four slits 28A and 28B. Lead portions 244 of the windings drawn out from coil 243 are crimped into slits 28A and 28B. Slits 28A and 28B each have a crimping portion 28C to which lead portions 244 are crimped, and a tapered portion 28D whose width increases from crimping portion 28C toward the tip in the crimping direction. Crimping portion 28C is narrower than the wire diameter of lead portions 244. Tapered portion 28D is wider than the wire diameter of lead portions 244 and is shaped to guide lead portions 244 into crimping portion 28C.

[0035] The terminal portion 27 has a plurality of connection pieces 29 and is electrically connected to the driver circuit 12. The substrate 13 has a through hole 13A (see FIG. 4) and a land 13B (see FIG. 4). The through hole 13A penetrates from the front surface (mounting surface) to the back surface of the substrate 13. The land 13B is a conductive film formed continuously from the inner wall surface of the through hole 13A to the periphery of the through hole 13A, and is connected to the pattern of the output terminal of each phase in the driver circuit 12. The connection pieces 29 inserted into the through hole 13A are soldered to the land 13B. As a result, the terminals 17A to 17C are connected to the output terminal of each phase in the driver circuit 12.

[0036] [Configuration of Terminal Holder 16] 5, terminal holder 16 has holding portions 16A to 16C and an opening 16D. Terminal holder 16 is made of an insulating material (e.g., resin). Holding portions 16A to 16C hold terminals 17A to 17C, respectively, and also hold lead portions 244 of the windings crimped into slits 28A and 28B of terminals 17A to 17C. Opening 16D penetrates terminal holder 16 from the front side to the back side, allowing lead portions 244 of the windings forming coil 243 to be drawn out to the back side of terminal holder 16.

[0037] As shown in FIG. 7 , the holding portion 16A is formed with a plurality of accommodating grooves 36, fitting grooves 37A and 37B, a plurality of ribs 38, and a plurality of locking protrusions 39. The accommodating grooves 36 accommodate lead portions 244 of the winding drawn out from the coil 243. In this embodiment, the holding portion 16A includes four accommodating grooves 36, four ribs 38, and four locking protrusions 39, and holds four lead portions 244. However, the present invention is not limited to this. The number of lead portions 244 held by one holding portion can be changed appropriately depending on the number of coils 243 and the number of phases of power supplied to the coils 243, and the number of accommodating grooves 36, the plurality of ribs 38, the locking protrusions 39, and the slits of the terminals 17A to 17C can also be changed accordingly.

[0038] While FIG. 7 only illustrates the configuration of the retaining portion 16A, retaining portions 16B and 16C have the same configuration. Although FIGS. 7 and 9 illustrate only one lead portion 244, it is preferable to insert multiple lead portions 244 into multiple storage grooves 36 simultaneously in an actual process. The storage groove 36 is an elongated groove whose longitudinal direction is the extension direction Z of the lead portions 244 stored therein. Hereinafter, the extension direction of the lead portions 244 stored in the storage groove 36 will be referred to simply as the "extension direction," the width direction of the storage groove 36 perpendicular to the extension direction will be referred to simply as the "width direction," and the depth direction of the storage groove 36 perpendicular to the extension direction and the width direction will be referred to simply as the "depth direction." The four storage grooves 36 are arranged in parallel with each other in the width direction X.

[0039] The fitting grooves 37A and 37B are arranged at positions that intersect with the extension direction Z of the accommodating groove 36, and are formed along the width direction X. In this embodiment, the fitting grooves 37A and 37B are arranged near both ends of the accommodating groove 36.

[0040] The dimensions of the fitting grooves 37A and 37B in the width direction X are formed to match the dimensions of the fitting pieces 26A and 26B of the terminal 17A. As a result, when the lead portion 244 is crimped into the slits 28A and 28B, the fitting pieces 26A and 26B simultaneously fit into the fitting grooves 37A and 37B, allowing the terminal 17A to be held by the holding portion 16A.

[0041] 8, the storage groove 36 is formed between a first side wall 36A and a second side wall 36B that are arranged at a predetermined interval in the width direction X. The storage groove 36 is a groove with a generally V-shaped cross section that is wider on the top surface (open end) side and narrower on the bottom surface side.

[0042] The ribs 38 are each disposed inside the storage groove 36. The ribs 38 are provided on a portion of the first side wall 36A in the extension direction Z. The ribs 38 also protrude in the width direction X from the first side wall 36A toward the second side wall 36B. That is, the ribs 38 reduce the dimension of the storage groove 36 in the width direction X in a portion of the extension direction Z.

[0043] The locking protrusion 39 is provided on the second side wall 36B side at a position offset from the rib 38 in the extension direction Z. The locking protrusion 39 also protrudes in the direction opposite to the direction in which the rib 38 protrudes (i.e., in the width direction X from the second side wall 36B side toward the first side wall 36A side). The locking protrusion 39 is also spaced apart from the bottom surface of the accommodating groove 36 in the depth direction Y. In other words, a space for accommodating the lead portion 244 of the winding is formed between the bottom surface of the accommodating groove 36 and the locking protrusion 39. As a result, the locking protrusion 39 locks the lead portion 244 of the winding accommodated in the accommodating groove 36.

[0044] The lead portion 244 accommodated inside the accommodating groove 36 is guided by the rib 38 toward the side where the locking projection 39 is located, and furthermore, the locking projection 39 locks the lead portion 244, preventing it from coming out of the accommodating groove 36. Therefore, the lead portion 244 is temporarily held inside the accommodating groove 36. Note that "temporarily held" refers to a state in which the lead portion 244 is not fixed to the accommodating groove 36, but the lead portion 244 does not come out of the accommodating groove 36.

[0045] As will be described later, the locking projection 39 always comes into contact with the lead portion 244 when the lead portion 244 is inserted into the receiving groove 36, but the tip is formed into a curved surface, which prevents damage to the lead portion 244. The locking projection 39 has rigidity and does not undergo elastic deformation when locking the lead portion 244.

[0046] 9, in the width direction X, a distance D1 between the rib 38 and the second side wall 36B facing the rib 38 is larger than the wire diameter R1 of the lead portion 244. In addition, in the width direction X, a distance D2 between the locking protrusion 39 and the first side wall 36A facing the locking protrusion 39 is larger than the wire diameter R1 of the lead portion 244. In addition, in the width direction X, a distance D3 between the tip of the rib 38 and the tip of the locking protrusion 39 is smaller than the wire diameter R1 of the lead portion 244.

[0047] Furthermore, the rib 38 is located closer to the bottom of the accommodating groove 36 than the locking protrusion 39 in the depth direction Y. Here, "located on the bottom side" means that at least a portion of the rib 38 is located closer to the bottom of the accommodating groove 36 than the locking protrusion 39 in the depth direction Y. As a result, when the lead portion 244 is inserted inside the accommodating groove 36, the lead portion 244 is guided by the rib 38 to the side where the locking protrusion 39 is located and to the lower side (bottom side) of the locking protrusion 39, so that the lead portion 244 is securely and temporarily held inside the accommodating groove 36.

[0048] The rib 38 has a flat surface 38A and an inclined surface 38B. The flat surface 38A is located on the bottom side of the accommodation groove 36 and is the surface of the rib 38 that protrudes the most in the width direction X. The inclined surface 38B is inclined from the first side wall 36A toward the protruding direction of the rib 38. As a result, when the lead portion 244 is accommodated inside the accommodation groove 36, the lead portion 244 is guided toward the locking protrusion 39 by the inclined surface 38B. Therefore, the lead portion 244 is temporarily held inside the accommodation groove 36 more securely.

[0049] [Motor 2 assembly process] Next, a process for assembling the circuit board 13, motor bracket 14, terminal holder 16, and terminals 17A to 17C will be described. Note that the following description mainly focuses on the process for holding the terminal 17A and the lead portion 244 in the holding portion 16A of the terminal holder 16, but the process for holding the terminals 17B, 17C and the lead portion 244 in the holding portions 16B, 16C is also performed in the same way, so a description thereof will be omitted.

[0050] First, the terminal holder 16 is attached to the back surface of the motor bracket 14. The terminal holder 16 is fastened to the motor bracket 14 with a plurality of screws. During the process of attaching the terminal holder 16 to the motor bracket 14, the lead portion 244 of the winding forming the coil 243 is pulled out to the back surface side of the terminal holder 16 through the openings 14A and 16D (see FIGS. 4 and 5).

[0051] A plurality of (four in this embodiment) lead portions 244 of the windings drawn out from the coil 243 are inserted into the accommodating groove 36 of the holding portion 16A. The lead portions 244 are automatically inserted into the accommodating groove 36 by a machine such as a forming machine. Figures 10(A) and 12(A) show the lead portions 244 in the middle of being inserted into the accommodating groove 36.

[0052] Inside the accommodation groove 36, a rib 38 that reduces the dimension in the width direction X and a locking projection 39 that projects on the opposite side from the rib 38 are arranged, so that the lead portion 244 abuts against the rib 38 and the locking projection 39. As a result, the lead portion 244 is inserted into the accommodation groove 36 while being bent into an S-shape by elastic force.

[0053] 10(B) and 11(B), after the lead portion 244 climbs over the locking projection 39, the shape is restored by the elastic force of the lead portion 244. That is, the lead portion 244 becomes linear and is accommodated inside the accommodation groove 36.

[0054] The positional relationship between the rib 38 and the locking projection 39 is preferably changed depending on the rigidity of the lead portion 244. When the rigidity of the lead portion 244 is high (when the elasticity is low), the lead portion 244 is less likely to bend into an S-shape. Therefore, it is preferable to appropriately change the distance L1 (see FIG. 11(A)) between the rib 38 and the locking projection 39 in the extension direction Z depending on the rigidity of the lead portion 244. This makes it easier for the lead portion 244 to bend into an S-shape.

[0055] After the lead portion 244 passes over the locking projection 39, the lead portion 244 assumes a linear shape and is housed inside the housing groove 36. When the lead portion 244 is housed inside the housing groove 36, the locking projection 39 locks the lead portion 244 and prevents it from coming out of the housing groove 36.

[0056] As described above, by inserting the lead portion 244 into the accommodating groove 36 with a small load, the lead portion 244 is temporarily held by the rib 38 and the locking protrusion 39, so the lead portion 244 can be temporarily held with a simple operation. In particular, when the lead portion 244 gets over the locking protrusion 39, the lead portion 244 is deformed into an S-shape, but this deformation is due to the elastic force of the lead portion 244, and the lead portion 244 can be inserted into the accommodating groove 36 with a small load.

[0057] As described above, in the width direction X, the distance D1 between the rib 38 and the side surface of the accommodating groove 36 that faces the rib 38, and the distance D2 between the locking protrusion 39 and the side surface of the accommodating groove 36 that faces the locking protrusion 39, are greater than the wire diameter R1 of the lead portion 244. Therefore, in the step of inserting the lead portion 244 into the accommodating groove 36, less load is required than when the lead portion is press-fitted, and the lead portion 244 can be easily temporarily held by simply inserting it into the accommodating groove 36 with a smaller load and the same amount of pressure.

[0058] As shown in Fig. 12(A), after the lead portion 244 is temporarily held in the housing groove 36, the lead portion 244 is crimped into the slits 28A and 28B of the terminal 17A. As shown in Fig. 12(B), while the lead portion 244 is being crimped into the slits 28A and 28B, the fitting pieces 26A and 26B are simultaneously fitted into the fitting grooves 37A and 37B. This allows the terminal 17A and the lead portion 244 to be held by the holding portion 16A.

[0059] In the present invention, the lead portions are not temporarily held in the housing grooves by press-fitting, as in conventional motors. Furthermore, due to the dimensional relationship between the wire diameter of the lead portions 244 and the dimensional relationships between the housing grooves 36, the ribs 38, and the locking projections 39, when the lead portions 244 are temporarily held, there is a gap between the lead portions 244 and the housing grooves 36. In other words, the lead portions 244 are movable in the width direction X inside the housing grooves 36. Therefore, when the lead portions 244 are crimped into the slits 28A and 28B, they can follow the tapered portions 28D of the slits 28A and 28B and smoothly enter the crimped portions 28C.

[0060] When lead portion 244 is crimped into slits 28A and 28B, the surface coating is stripped off. As a result, terminals 17A to 17C are electrically connected to lead portion 244. After terminals 17A to 17C and lead portion 244 are connected, board 13 is fastened to motor bracket 14 with screws 25. Furthermore, lands 13B of board 13 are soldered to connection pieces 29 of terminals 17A to 17C. As a result, driver circuit 12 and coil 243 are electrically connected via terminals 17A to 17C.

[0061] As described above, in the process of inserting the lead portion 244 into the receiving groove 36, the lead portion 244 can be easily temporarily held by simply inserting it with a small load and the same amount of pressure. Therefore, these processes can be performed automatically by machine. In other words, manual work by an operator is no longer necessary, and work efficiency is improved.

[0062] Furthermore, in the present invention, the lead portions 244 are temporarily held in the housing grooves 36 without being press-fitted. That is, the process of inserting the lead portions 244 into the housing grooves 36 does not deform the housing grooves 36, and therefore, unlike conventional motors, it is not difficult to insert the lead portions 244 into the housing grooves 36. Therefore, in the motor 2 of the present invention, multiple lead portions 244 can be inserted into multiple housing grooves 36 simultaneously. Furthermore, the lead portions 244 can be inserted into the housing grooves 36 with a small load and temporarily held by the ribs 38 and the locking projections 39, so the lead portions 244 will not come off the housing grooves 36. That is, the lead portions 244 can be stably temporarily held, improving the yield rate.

[0063] The above-described embodiments are merely examples for explaining the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can make appropriate modifications without departing from the spirit of the present invention. [Explanation of symbols]

[0064] 2 motors 11 Brushless motor 12 Driver circuit 13 PCB 13A through hole 13B Land 14 Motor bracket 14A opening 15 Driver Case 16 Terminal holder 16A~16C Holding part 16D opening Terminals 17A~17C 18 Connector unit 21 Shaft 22 Bearings 23 Rotor 24 Stator 25 screws 26 Main body 26A, 26B mating piece 27 Terminal section 28A, 28B slits 28C Crimping section 28D tapered section 29 Connecting piece 36 Storage groove 36A 1st side wall 36B 2nd side wall 37A, 37B fitting groove 38 Ribs 38A flat surface 38B Slope 39 Locking protrusion 231 Permanent Magnets 232 rotor yoke 232A Outer wall 232B Inner wall 232C Connecting wall 241 stator core 242 Stator insulator 243 Coil 244 Lead section D1~D3 interval L1 distance R1 wire diameter X Width direction Y depth direction Z extension direction

Claims

1. a terminal having a slit to which a winding drawn from the coil is crimped; a terminal holder for holding the terminal, The terminal holder includes: an accommodation groove for accommodating the winding, the accommodation groove being formed between a first side wall and a second side wall that are arranged at a predetermined interval in a width direction perpendicular to the extending direction of the winding; a rib provided on a portion of the first side wall in the extension direction to reduce a dimension of the accommodation groove in a width direction; a locking protrusion provided on the second side wall at a position offset from the rib in the extension direction, for locking the winding housed in the housing groove.

2. 2. The motor according to claim 1, wherein the distance between the rib and the second side wall in the width direction is greater than the wire diameter of the winding.

3. 3. The motor according to claim 2, wherein the distance between the locking projection and the first side wall in the width direction is greater than the wire diameter of the winding.

4. 4. The motor according to claim 3, wherein the distance between the tip of the rib and the tip of the locking projection in the width direction is smaller than the wire diameter of the winding.

5. The motor according to claim 1 , wherein the rib is located closer to the bottom of the accommodation groove than the locking protrusion in a depth direction of the accommodation groove, which is perpendicular to the extension direction and the width direction.

6. 2. The motor according to claim 1, wherein the rib has an inclined surface that guides the winding housed in the housing groove toward the locking projection.

7. The terminal holder includes a plurality of the accommodation grooves, The motor according to claim 1 , wherein the plurality of accommodation grooves are arranged in parallel with each other in the width direction.

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