Motor and electric pump

Abstract

To provide a motor in which quality of connection between a terminal member and a lead wire is enhanced and an electric pump.SOLUTION: A motor includes: a motor unit; a circuit board arranged on one side in an axial direction of the motor unit; a terminal member connecting a lead wire extending from the motor unit and the circuit board; and a holding member for holding the lead wire. The terminal member includes a terminal portion located at an end portion on one side in the axial direction and connected to the circuit board, and a pressure contact portion located at an end portion on the other side in the axial direction and connected to the lead wire. The pressure contact portion includes a notch portion that opens to the other side in the axial direction and sandwiches the lead wire at an inner edge thereof. The holding member includes a body portion having a first surface facing one side in the axial direction and a second surface facing a direction different from the first surface, and a convex portion protruding from the second surface. The first surface includes a hole portion into which the pressure contact portion is inserted, and a groove portion extending to overlap the hole portion. The lead wire includes a connection portion that is housed in the groove portion and connected to the pressure contact portion, and a distal end portion that is located on a distal end side relative to the connection portion and being hooked on the protrusion.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a motor and an electric pump. [Background technology]

[0002] Electromechanical integrated motors in which the motor and a circuit board are integrated are known. A structure has been disclosed for such motors that simplifies the assembly process by providing terminal members that connect lead wires extending from a stator to the circuit board. Various methods for connecting the lead wires to such terminal members have also been proposed. For example, Patent Document 1 discloses a method in which a terminal member is provided with a notch, and the lead wires are connected to the terminal member by inserting the lead wires into the notch. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2017 / 0331342 Summary of the Invention [Problem to be solved by the invention]

[0004] The process of inserting the lead wire into the notch of the connection terminal is prone to misalignment and sagging of the lead wire, which makes it difficult to insert the lead wire to the desired position in the notch, and this can result in an insufficient connection (poor connection) between the connection terminal and the lead wire.

[0005] In view of the above circumstances, one aspect of the present invention has an object to provide a motor and an electric pump in which the quality of connection between the terminal members and the lead wires is improved. [Means for solving the problem]

[0006] One embodiment of a motor according to the present invention includes a motor section including a rotor rotatable about a central axis and a stator facing the rotor across a radial gap; a circuit board disposed on one axial side of the motor section; terminal members connecting lead wires extending from the stator to the circuit board; and a retaining member positioned axially between the stator and the circuit board and holding the lead wires. The terminal member has a terminal portion located at one axial end and connected to the circuit board, and a press-fit portion located at the other axial end and connected to the lead wires. The press-fit portion has a notch that opens to the other axial end and clamps the lead wires at its inner edge. The retaining member has a main body portion having a first surface facing one axial side and a second surface facing a direction different from the first surface, and a protrusion protruding from the second surface. The first surface has a hole into which the press-fit portion is inserted and a groove extending to overlap the hole. The lead wire has a connection portion that is accommodated in the groove and connected to the insulation displacement portion, and a tip portion that is located further to the tip side than the connection portion and is hooked onto the protrusion.

[0007] One aspect of the electric pump of the present invention includes the motor described above and a pump mechanism connected to the rotor described above. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to provide a motor and an electric pump in which the quality of the connection between the terminal member and the lead wire is improved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view of an electric pump according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the electric pump taken along line II-II in FIG. [Figure 3] FIG. 3 is a perspective view of a stator, a holding member, and a terminal member according to one embodiment. [Figure 4] FIG. 4 is a partially enlarged perspective view of a stator, a holding member, and a terminal member according to one embodiment. [Figure 5] FIG. 5 is a perspective view of a holding member according to one embodiment. [Figure 6] FIG. 6 is a partially enlarged view of FIG. [Figure 7] FIG. 7 is a perspective view of a terminal member according to one embodiment. [Figure 8] FIG. 8 is a diagram showing a procedure for connecting the lead wire and the terminal member according to one embodiment, showing a state in which the lead wire is inserted into the groove. [Figure 9] FIG. 9 is a diagram showing a procedure for connecting the lead wire and the terminal member according to an embodiment, showing a state in which the terminal member is inserted into the hole portion. [Figure 10] FIG. 10 is a perspective view showing a part of the holding member of the first modification. [Figure 11] FIG. 11 is a perspective view showing a part of the holding member of the second modification. DETAILED DESCRIPTION OF THE INVENTION

[0010] In the following description, the Z axis is indicated in the figures where appropriate. The Z axis indicates the direction in which the central axis J of the embodiment described below extends. The central axis J shown in each figure is a virtual axis. In the following description, the direction in which the central axis J extends, i.e., the direction parallel to the Z axis, is referred to as the "axial direction." The radial direction centered on the central axis J is simply referred to as the "radial direction." The circumferential direction centered on the central axis J is simply referred to as the "circumferential direction." The side of the axial direction toward which the arrow of the Z axis points (+Z side) is referred to as the "upper side" or "one axial side." The axial side opposite to the side toward which the arrow of the Z axis points (-Z side) is referred to as the "lower side" or "other axial side." The circumferential direction is indicated by the arrow θ in each figure. The side of the circumferential direction toward which the arrow θ points is referred to as the "one circumferential side." The circumferential side opposite to the side toward which the arrow θ points is referred to as the "other circumferential side." One circumferential side (+θ) is the side that proceeds clockwise around the central axis J as viewed from one axial side. The other circumferential side (−θ) is the side that proceeds counterclockwise around the central axis J as viewed from one axial side. Note that the terms upper side and lower side are simply names used to describe the relative positional relationship of each part, and the actual positional relationship may be one other than the positional relationship indicated by these names.

[0011] (electric pump) FIG. 1 is a cross-sectional view of an electric pump 100 of this embodiment. The electric pump 100 is attached to, for example, a device mounted on a vehicle. The device to which the electric pump 100 is attached may be an automatic transmission or a drive unit that drives the axles of the vehicle. The device to which the electric pump 100 is attached is called a target device 5. The electric pump 100 is, for example, an electric oil pump that supplies oil to a device mounted on a vehicle.

[0012] (electric pumps, motors) The electric pump 100 includes a motor 2 and a pump mechanism section 40. The motor 2 includes a housing 10, a motor section 3, a circuit board 70, a holding member 60, and a plurality of terminal members 50.

[0013] (housing) The housing 10 accommodates the motor section 3, circuit board 70, holding member 60, terminal member 50, and pump mechanism section 40. The housing 10 has a motor housing 11, a board accommodating member 13, a lid member 14, and a pump cover member 19. The motor housing 11, board accommodating member 13, lid member 14, and pump cover member 19 are separate members. The board accommodating member 13 is fixed to the upper side of the motor housing 11. The lid member 14 is fixed to the upper side of the board accommodating member 13. The pump cover member 19 is fixed to the lower side of the motor housing 11.

[0014] (Motor housing) The motor housing 11 has a generally cylindrical shape and extends axially about a central axis J. The motor housing 11 accommodates the motor unit 3, a holding member 60, a terminal member 50, and a pump mechanism unit 40. The motor housing 11 has a peripheral wall portion 11a, a bottom portion 11d, a shaft support portion 11e, and an electric pump mechanism accommodating portion 11h.

[0015] The peripheral wall portion 11a surrounds the motor unit 3, the holding member 60, and the terminal member 50 from the radial outside. The peripheral wall portion 11a is cylindrical and extends axially around the central axis J. The upper end of the peripheral wall portion 11a is the upper end of the motor housing 11. A locking groove portion 11c is provided on the outer peripheral surface of the peripheral wall portion 11a. The locking groove portion 11c is located at the upper end of the outer peripheral surface of the peripheral wall portion 11a. In this embodiment, the locking groove portion 11c is provided around the entire outer peripheral surface of the peripheral wall portion 11a.

[0016] The bottom portion 11d is substantially annular in shape, centered on the central axis J. The radial outer edge of the surface of the bottom portion 11d facing upward is connected in the axial direction to the lower end of the peripheral wall portion 11a. The shaft support portion 11e is substantially cylindrical and protrudes upward. The lower portion of the outer peripheral surface of the shaft support portion 11e is connected in the radial direction to the inner peripheral surface of the bottom portion 11d. The shaft support portion 11e is open to the top and bottom.

[0017] The electric pump mechanism accommodating portion 11h accommodates the pump mechanism portion 40. The electric pump mechanism accommodating portion 11h protrudes downward from the bottom portion 11d. The electric pump mechanism accommodating portion 11h has a generally cylindrical shape that is centered on the central axis J and opens downward. The interior of the electric pump mechanism accommodating portion 11h is connected to the interior of the peripheral wall portion 11a via the interior of the shaft support portion 11e.

[0018] (Pump cover parts) The pump cover member 19 is generally disk-shaped and centered on the central axis J. The pump cover member 19 is disposed below the pump mechanism portion 40. The pump cover member 19 is fixed to the lower end of the inner circumferential surface of the electric pump mechanism-accommodating portion 11h. The pump cover member 19 covers the opening of the electric pump mechanism-accommodating portion 11h from below. The pump cover member 19 is provided with a suction portion 19a, a suction port 19b, and a discharge port 19c.

[0019] The suction portion 19a has a cylindrical shape and protrudes downward from the pump cover member 19. The suction port 19b is a hole that passes through the pump cover member 19 and the suction portion 19a in the axial direction. The discharge port 19c is a hole that passes through the pump cover member 19 in the axial direction. The suction port 19b and the discharge port 19c each connect the inside of the electric pump mechanism accommodating portion 11h to the outside of the electric pump 100. In this embodiment, oil is sucked into the inside of the electric pump mechanism accommodating portion 11h through the suction port 19b, and the oil is discharged to the outside of the electric pump 100 through the discharge port 19c.

[0020] (Substrate housing member) The board accommodating member 13 accommodates the circuit board 70 inside. The board accommodating member 13 is fixed to the cover member 14 together with the circuit board 70. The board accommodating member 13 is also fixed to the upper end of the motor housing 11. The board accommodating member 13 has a substantially circular ring shape centered on the central axis J. The board accommodating member 13 is made of resin.

[0021] The board accommodating member 13 has a board surrounding portion 13a, a plurality of terminal support portions 13d, a plurality of fixing claw portions 13b, and a flange portion 13c.

[0022] The board surrounding portion 13a has a substantially circular ring shape centered on the central axis J. The board surrounding portion 13a surrounds the circuit board 70 from the radially outer side. A groove for accommodating an O-ring is provided on the outer peripheral surface of the board surrounding portion 13a. The O-ring is compressed between the inner peripheral surface of the pump accommodating portion of the device 5 to be attached.

[0023] The terminal support portions 13d protrude radially inward from the inner circumferential surface of the board enclosing portion 13a. The terminal support portions 13d support the terminal members 50. The motor 2 of this embodiment is provided with three terminal members 50. Therefore, three terminal support portions 13d are provided on the board accommodating member 13. The three terminal support portions 13d are arranged at equal intervals in the circumferential direction.

[0024] FIG. 2 is a cross-sectional view of the electric pump 100 taken along line II-II in FIG. A retaining hole 13k is provided in the terminal support portion 13d. The retaining hole 13k penetrates the terminal support portion 13d in the axial direction (vertical direction). A terminal member 50 is disposed inside the retaining hole 13k. Two stepped surfaces 13s are provided on the inner surface of the retaining hole 13k. The two stepped surfaces 13s each face downward. The two stepped surfaces 13s are disposed on the same plane. The two stepped surfaces 13s are provided on side surfaces on one and the other circumferential sides of the retaining hole 13k. The terminal support portion 13d supports the terminal member 50 from above at the two stepped surfaces 13s.

[0025] As shown in FIG. 1, the fixed claws 13b extend downward from the lower end of the circuit board surrounding portion 13a. The fixed claws 13b are arranged radially outward from the outer circumferential surface of the peripheral wall portion 11a. The tips of the fixed claws 13b protrude radially inward. The tips of the fixed claws 13b engage with the locking grooves 11c of the peripheral wall portion 11a. This secures the circuit board accommodating member 13 to the motor housing 11.

[0026] The flange portion 13c protrudes radially outward from the outer peripheral surface of the board surrounding portion 13a. A plurality of flange holes 13h are provided in the flange portion 13c. The flange holes 13h penetrate the flange portion 13c in the axial direction. A cylindrical collar member 83 extending in the axial direction is fixed to each flange hole 13h. A bolt (not shown) is passed through the collar member 83 from above, and the bolt is fastened into a screw hole (not shown) provided in the device 5 to be attached. In this way, the electric pump 100 is fixed to the device 5 to be attached.

[0027] (Cover member) The lid member 14 closes the opening of the board housing member 13 from above. The lid member 14 covers the circuit board 70 from above and protects the circuit board 70. The lid member 14 has fixing portions (not shown) that fix the circuit board 70 and the board housing member 13. The lid member 14 supports the circuit board 70 and the board housing member 13.

[0028] (Motor section) The motor unit 3 is accommodated inside the motor housing 11. In the axial direction, the motor unit 3 is disposed below the circuit board 70 and above the pump mechanism unit 40. The motor unit 3 has a rotor 20 and a stator 30.

[0029] (Rotor) The rotor 20 is rotatable about the central axis J. The rotor 20 has a rotor core 21, a magnet 22, and a shaft 23. The magnet 22 and the shaft 23 are fixed to the rotor core 21. The rotor 20 is supported by the inner circumferential surface of a shaft support portion 11e that supports the shaft 23 so as to be rotatable about the central axis J. The shaft 23 is cylindrical and extends in the axial direction about the central axis J. The shaft 23 passes axially through the inside of the shaft support portion 11e and is disposed so as to straddle the inside of the peripheral wall portion 11a and the inside of the electric pump mechanism accommodating portion 11h.

[0030] (stator) The stator 30 is disposed radially outward of the rotor 20. The stator 30 faces the rotor 20 with a gap therebetween in the radial direction. The stator 30 includes a stator core 31, an insulator 32, and a coil portion 33.

[0031] (stator core) The stator core 31 surrounds the rotor core 21 from the radial outside. The outer peripheral surface of the stator core 31 is fixed to the peripheral wall portion 11a of the motor housing 11. The stator core 31 has an annular core back portion 31a and a plurality of teeth 31b that protrude radially inward from the inner peripheral surface of the core back portion 31a. The plurality of teeth 31b are arranged at equal intervals along the circumferential direction. Coil portions 33 are attached to the teeth 31b via insulators 32.

[0032] (insulator) The insulator 32 has a plurality of bobbin-shaped winding frame portions 32F. The number of winding frame portions 32F is the same as the number of teeth portions 31b provided on the insulator 32. The plurality of winding frame portions 32F are attached to the teeth portions 31b, respectively.

[0033] The reel portion 32F has a rectangular tube portion 32a, an inner wall portion 32b, and an outer wall portion 32c. The rectangular tube portion 32a has a rectangular tube shape extending along the radial direction. The rectangular tube portion 32a surrounds the outer peripheral surface of the tooth portion 31b. The insulator 32 is disposed between the outer peripheral surface of the tooth portion 31b and the coil portion 33 and insulates the tooth portion 31b from the coil portion 33. The inner wall portion 32b and the outer wall portion 32c are each plate-shaped and extend along a plane perpendicular to the radial direction. The inner wall portion 32b and the outer wall portion 32c face each other in the radial direction. The inner wall portion 32b protrudes from the radially inner end of the rectangular tube portion 32a in both axial and circumferential directions. The outer wall portion 32c protrudes from the radially outer end of the rectangular tube portion 32a in both axial and circumferential directions. The coil portion is wound around the outer periphery of the rectangular tube portion 32a between the inner wall portion 32b and the outer wall portion 32c. The outer wall portion 32c insulates the core back portion 31a and the coil portion 33.

[0034] Fig. 3 is a perspective view of the stator 30, the holding member 60, and the terminal member 50. Fig. 4 is a partially enlarged perspective view of the stator 30, the holding member 60, and the terminal member 50. As shown in Fig. 3, the outer wall portion 32c of the insulator 32 has an upper wall portion 32g that protrudes above the stator core. The upper wall portions 32g of the multiple reel portions 32F are aligned in the circumferential direction. The multiple upper wall portions 32g are arranged in a cylindrical shape centered on the central axis J.

[0035] As shown in FIG. 4, a locking recess 32d recessed radially inward is provided on the surface of the upper wall portion 32g facing radially outward. The locking recess 32d extends in the circumferential direction. Furthermore, a guide groove 32e is provided on the surface of the upper wall portion 32g facing radially inward. The guide groove 32e extends in the axial direction (up and down direction). The guide groove 32e is recessed radially outward. The guide groove 32e opens upward at the upper end of the upper wall portion 32g. The guide groove 32e accommodates the lead wire 39. The guide groove 32e guides the lead wire 39 extending from the coil portion 33 upward.

[0036] (coil part) 1, the coil portion 33 is electrically connected to the circuit board 70 via the terminal member 50. Power is supplied to the coil portion 33 from the circuit board 70 via the terminal member 50. The coil portion 33 has a plurality of coil main body portions 33a and a plurality of lead wires 39.

[0037] The multiple coil body portions 33a are wound around the tooth portions 31b via insulators 32. The lead wires 39 are drawn upward from the coil body portions 33a. The coil portion 33 of this embodiment has six lead wires 39. Each lead wire 39 is drawn from a different coil body portion 33a. The lead wires 39 are connected to the circuit board 70 via terminal members 50.

[0038] (Pump mechanism) The pump mechanism 40 is located below the motor unit 3. The pump mechanism 40 is housed inside the electric pump mechanism housing 11h. The pump mechanism 40 has an inner rotor 41 and an outer rotor 42. The inner rotor 41 is connected to the lower end of the shaft 23. That is, the pump mechanism 40 is connected to the rotor 20. The inner rotor 41 is annular and surrounds the shaft 23. The outer rotor 42 is annular and surrounds the inner rotor 41. The inner rotor 41 and the outer rotor 42 mesh with each other. As a result, when the rotor 20 rotates around the central axis J, the inner rotor 41 and the outer rotor 42 also rotate around the central axis J.

[0039] (circuit board) The circuit board 70 is located above the motor unit 3. The circuit board 70 is plate-shaped and extends in a direction perpendicular to the axial direction. The circuit board 70 is electrically connected to the coil unit 33 via the terminal members 50. The circuit board 70 controls the power supplied to the coil unit 33.

[0040] As shown in FIG. 4, a plurality of through holes 70h are provided in the circuit board 70. The plurality of through holes 70h are holes that penetrate the circuit board 70 in the axial direction. Conductive copper foil is provided on the inner surface of the through holes 70h. Six through holes 70h are provided in the circuit board 70 of this embodiment. The terminal portions 53 of the terminal members 50 are inserted into the through holes 70h.

[0041] (holding member) As shown in FIG. 1 , the holding member 60 is an insulating member. In this embodiment, the holding member 60 is made of a resin material. The holding member 60 is disposed axially between the stator 30 and the circuit board 70. The holding member 60 has a substantially annular shape surrounding the central axis J. The holding member 60 holds the lead wires 39. In this embodiment, the holding member 60 is attached to the insulator 32. That is, the holding member 60 is attached to the stator 30.

[0042] Fig. 5 is a perspective view of the holding member 60. Fig. 6 is a partially enlarged view of Fig. 5. As shown in FIG. 5, the holding member 60 has a holding member main body (main body) 61, a plurality of protrusions 65, and a plurality of claws 64.

[0043] In this embodiment, the holding member main body 61 has an annular shape centered on the central axis J. The holding member main body 61 has an upper surface (first surface) 61a facing upward (i.e., one axial side) and an inner circumferential surface (second surface) 61b facing radially inward. In this embodiment, the upper surface 61a is a flat surface. On the other hand, the inner circumferential surface 61b is a cylindrical surface centered on the central axis J.

[0044] The upper surface 61a of the holding member main body 61 has a plurality of holes 62 and a plurality of grooves 63. The plurality of holes 62 are arranged at equal intervals along the circumferential direction. In this embodiment, the holding member main body 61 is provided with three holes 62. In this embodiment, the holes 62 are recessed downward with respect to the upper surface 61a and have a bottom surface. However, the holes 62 may also penetrate the holding member main body 61 in the axial direction (vertical direction).

[0045] The grooves 63 are recessed downward relative to the upper surface 61a of the holding member main body 61. The grooves 63 extend radially. The grooves 63 extend from the outer edge to the inner edge of the holding member main body 61 on the upper surface 61a. Therefore, both ends of the grooves 63 open at the outer edge and inner edge of the holding member main body 61, respectively. The holding member main body 61 of this embodiment is provided with six grooves. Two of the six grooves 63 are grouped into groups 63G, and each group 63G is arranged at equal intervals in the circumferential direction. As will be described later, the lead wires 39 are arranged inside the grooves 63 (see FIG. 8).

[0046] As shown in Fig. 6, the two grooves 63 in one set 63G extend parallel to each other. The two grooves 63 in one set 63G extend while overlapping one hole 62. That is, the grooves 63 extend across the hole 62. The radially outer ends of the grooves 63 are located radially outside the hole 62, and the radially inner ends of the grooves 63 are located radially inside the hole 62. The grooves 63 are discontinued at the portions that overlap the hole 62.

[0047] As shown in FIG. 5, the protrusions 65 protrude radially inward from the inner circumferential surface 61b of the holding member main body 61. As will be described later, the leading ends of the lead wires 39 are hooked onto the protrusions 65 (see FIG. 8). The holding member main body 61 of this embodiment is provided with 12 protrusions 65. However, in the holding member main body 61 of this embodiment, the lead wires 39 are hooked onto only six of the 12 protrusions 65. Therefore, the holding member main body 61 is provided with six protrusions 65 that perform the function of hooking the lead wires 39. In the following description, attention will be focused on only the six protrusions 65 that perform the function. These six protrusions 65 are grouped into two groups 65G, and each group 65G is arranged at equal intervals in the circumferential direction.

[0048] The two protrusions 65 in one set 65G are located on one circumferential side (+θ) and the other circumferential side (-θ) of the two grooves 63 in one set 63G in the circumferential direction. The two protrusions 65 in one set 65G have shapes that are symmetrical in the circumferential direction. In the following description, when distinguishing between the two protrusions 65 in one set 65G, the one located on the other circumferential side (-θ) will be referred to as a first protrusion 65A, and the other located on the one circumferential side (+θ) will be referred to as a second protrusion 65B.

[0049] 6, the protrusion 65 is plate-shaped and has a uniform thickness in the axial direction (vertical direction). An upper surface 66b of the protrusion 65 is located lower than an upper surface 61a of the holding member main body 61. The upper surface 66b of the protrusion 65 is located lower than a bottom surface 63a of the groove 63. The lower surface 66a of the protrusion 65 is located higher than the lower surface of the holding member main body 61.

[0050] The protrusion 65 has a protrusion main body 66, a first extension 67, and a second extension 68. In the following description, the arrangement and shape of the protrusion 65 may be described based on its positional relationship with the groove 63. The holding member 60 of this embodiment is provided with a plurality of grooves 63, but the groove 63 referred to when describing the positional relationship of the protrusion 65 is the single groove 63 into which the lead wire 39 hooked on the protrusion 65 is inserted.

[0051] The protrusion main body 66 is connected to the inner circumferential surface 61b of the holding member main body 61. The protrusion main body 66 protrudes toward the second surface. The first extension portion 67 and the second extension portion 68 extend from the protrusion main body 66 to both sides in the circumferential direction. The first extension portion 67 and the second extension portion 68 also extend along the inner circumferential surface 61b.

[0052] The first extending portion 67 extends away from the groove portion 63 with respect to the protrusion main body 66. On the other hand, the second extending portion 68 is disposed on a side closer to the groove portion 63 with respect to the protrusion main body 66. More specifically, the first extending portion 67 of the first protrusion 65A extends toward the other circumferential side (-θ) with respect to the protrusion main body 66. The second extending portion 68 of the first protrusion 65A extends toward one circumferential side (+θ) with respect to the protrusion main body 66. The first extending portion 67 of the second protrusion 65B extends toward one circumferential side (+θ) with respect to the protrusion main body 66. The second extending portion 68 of the second protrusion 65B extends toward the other circumferential side (-θ) with respect to the protrusion main body 66.

[0053] In this embodiment, the first extending portion 67 extends longer than the second extending portion 68. That is, of the first extending portion 67 and the second extending portion 68, one that is disposed farther away from the groove portion 63 extends longer from the protrusion main body 66 than the other.

[0054] Here, the first extending portion 67 and the second extending portion 68 of the protrusion 65 will be described in more detail using the first protrusion 65A as an example. The circumferential arrangement of the first extending portion 67 and the second extending portion 68 of the second protrusion 65B is opposite to that of the first protrusion 65A.

[0055] In the first protrusion 65A, the first extension 67 is connected to a radially inner end of the end face on the other circumferential side (-θ) of the protrusion main body 66. In the first protrusion 65A, the second extension 68 is connected to a radially inner end of the end face on one circumferential side (+θ) of the protrusion main body 66. The first extension 67 and the second extension 68 have a generally rectangular prism shape extending linearly along the circumferential direction. The radially outward surfaces of the first extension 67 and the second extension 68 face the inner circumferential surface 61b of the holding member main body 61 via gaps G1 and G2. The radial dimensions of these gaps G1 and G2 are larger than the wire diameter of the lead wire 39. The lead wire 39 to be hooked onto the protrusion 65 is disposed in these gaps G1 and G2.

[0056] As shown in Fig. 3, the claw portions 64 extend downward, i.e., to the other axial side, from the holding member main body 61. The claw portions 64 are plate-shaped with their thickness direction aligned in the radial direction. The multiple claw portions 64 are arranged at approximately equal intervals along the circumferential airflow direction. The claw portions 64 are arranged radially outward of the upper wall portion 32g of the insulator 32.

[0057] As shown in Fig. 4, the claw portion 64 has a protrusion 64a that protrudes radially inward. The protrusion 64a protrudes radially inward from the lower edge of the claw portion 64. The protrusion 64a is engaged with the engagement recess 32d of the upper wall portion 32g. This secures the holding member 60 to the stator 30. In this embodiment, the case where the holding member 60 is secured to the insulator 32 has been described. However, the holding member 60 may also be secured to the stator core 31.

[0058] (Terminal material) The terminal member 50 connects the lead wires 39 extending from the stator 30 to the circuit board 70. The terminal member 50 is disposed between the holding member 60 and the circuit board 70 in the axial direction.

[0059] 3, in this embodiment, the motor 2 has three terminal members 50. The three terminal members 50 are arranged at approximately equal intervals along the circumferential direction.

[0060] 7 is a perspective view of the terminal member 50. The terminal member 50 is made of a metal material with excellent conductivity, such as a copper alloy. The terminal member 50 has a plate shape extending along a plane perpendicular to the radial direction. The terminal member 50 is formed by, for example, press working.

[0061] The terminal member 50 has a base 51, a pressure-contact portion 52 located below the base 51, a plurality of terminal portions 53 located above the base 51, and a pair of supported portions 54 protruding on both circumferential sides of the base 51. The pressure-contact portion 52 is located at the lower end of the terminal member 50. The terminal portions 53 are located at the upper end of the terminal member 50 (i.e., on one axial side).

[0062] 2, the base portion 51 has a rectangular shape when viewed from the radial direction. The base portion 51 is disposed inside the holding hole 13k of the terminal support portion 13d. The pair of supported portions 54 are each located below the stepped surface 13s of the holding hole 13k. The supported portions 54 come into contact with the stepped surface 13s.

[0063] The terminal portion 53 protrudes upward from the upper edge of the base portion 51. The terminal portion 53 is connected to the circuit board 70. The terminal member 50 of this embodiment is provided with two terminal portions 53. The two terminal portions 53 are aligned in the circumferential direction.

[0064] The terminal portion 53 is a so-called press-fit pin. When viewed from the radial direction, the terminal portion 53 has a substantially elliptical insertion portion 53a whose major axis extends in the axial direction. A hole penetrating the insertion portion 53a in the radial direction is provided. The provision of the hole allows the insertion portion 53a to be elastically deformed in the circumferential direction.

[0065] The terminal portions 53 are pressed from below into the through holes 70h of the circuit board 70. The insertion portions 53a are disposed inside the through holes 70h. Because the insertion portions 53a are elastically deformable, the restoring force of the insertion portions 53a fixes each terminal portion 53 to the through holes 70h. This connects each terminal portion 53 to the circuit board 70. Furthermore, the terminal members 50 and the circuit board 70 are electrically connected.

[0066] According to this embodiment, in the process of connecting the terminal member 50 and the circuit board 70, the terminal portion 53 of the terminal member 50 is press-fitted into the through hole 70h of the circuit board 70, thereby electrically connecting the terminal member 50 and the circuit board 70. That is, according to this embodiment, the process of connecting the terminal member 50 and the circuit board 70 can be simplified, and an increase in the number of steps for assembling the motor 2 and the electric pump 100 can be suppressed.

[0067] The crimping portion 52 extends downward from the lower edge of the base portion 51. The crimping portion 52 is connected to the lead wire 39. The crimping portion 52 has two notches 52a. The notches 52a extend in the axial direction (up and down). The notches 52a open downward (i.e., to the other axial side) at the lower end of the crimping portion 52. The notches 52a are provided with tapered portions 52b at the lower end that widen the notches 52a. The tapered portions 52b guide the lead wire 39 when inserted into the notches 52a.

[0068] The pressure-contact portion 52 has a pair of inner edges 52t facing each other. The pair of inner edges 52t extend parallel to each other. The cutout portion 52a sandwiches the lead wire 39 between the pair of inner edges 52t. The distance from one of the pair of inner edges 52t of the cutout portion 52a to the other is smaller than the wire diameter of the lead wire 39. The lead wire 39 is press-fitted between the opposing inner edges 52t. The lead wire 39 is connected to the terminal member 50 by being sandwiched between and in contact with the pair of inner edges 52t.

[0069] The lead wire 39 of this embodiment has a core made of a copper alloy and an insulating coating such as enamel that covers the core. The lead wire 39 is press-fitted into the notch 52a after the insulating coating is removed in advance. In this case, it is possible to prevent the insulating coating from interfering with the electrical connection between the lead wire 39 and the terminal member 50.

[0070] Alternatively, the lead wire 39 may be press-fitted into the notch 52a without removing the insulating coating. In this case, the lead wire 39 is press-fitted and sandwiched between the pair of inner edges 52t, so that the insulating coating of the lead wire 39 can be torn by the inner edges 52t. This allows the insulating coating to be partially removed, bringing the core material of the lead wire 39 into direct contact with the inner edges 52t. In this case, the step of removing the insulating coating is not necessary, and the operation of connecting the lead wire 39 to the terminal member 50 can be simplified.

[0071] In this embodiment, the lead wire 39 can be electrically connected to the terminal member 50 simply by passing the lead wire 39 through the inner edges 52t. This embodiment simplifies the process of connecting the lead wire 39 to the terminal member 50 compared to joining and welding, such as fusing, thereby reducing the manufacturing cost of the electric pump 100. Furthermore, the connection process of this embodiment does not involve heating, as compared to connection processes that employ soldering or fusing, and therefore can suppress deterioration of surrounding components due to the effects of heat. Note that in the motor 2 of this embodiment, the reliability of the electrical connection may be improved by additionally soldering the lead wire 39 to the inner edges 52t.

[0072] (Connection procedure) Next, a procedure for connecting the terminal member 50 and the lead wire 39 in the process of assembling the electric pump 100 will be described. Figures 8 and 9 are diagrams showing the procedure for connecting the lead wire 39 and the terminal member 50. Figure 8 shows the step of holding the lead wire 39 in the holding member 60, and Figure 9 shows the step of inserting the lead wire 39 into the notch 52a.

[0073] 4, the two lead wires 39 are led upward from radially outer ends of different coil main body portions 33a. The lead wires 39 are guided by guide grooves 32e of the insulator 32 and led along the outer peripheral surface of the holding member main body portion 61 of the holding member 60 to a position above the holding member main body portion 61.

[0074] As shown in FIG. 8 , the two lead wires 39 are guided from the radially outer side to the radially inner side of the holding member main body 61. The two lead wires 39 are housed in the two grooves 63 of one set 63G. As described above, the grooves 63 are terminated at the portions where they overlap with the holes 62. The lead wires 39 are supported at the radially inner and outer ends of the grooves 63 and extend across the holes 62. In the following description, the portions of the lead wires 39 that are located at the grooves 63 and the holes 62 are referred to as the connection portion 39a, and the portions that are located closer to the tip than the connection portion 39a are referred to as the tip portion 39b.

[0075] Furthermore, the lead wire 39 is led downward from the radially inner opening of the groove 63 along the inner circumferential surface 61b of the holding member main body 61. The lead wire 39 is further led to the lower side of the protrusion 65 and wound around the protrusion main body 66 from the lower side. The lead wire 39 is located on both circumferential sides of the protrusion main body 66, between the first extending portion 67 and the inner circumferential surface 61b, and between the second extending portion 68 and the inner circumferential surface 61b, respectively. As a result, the tip portion 39b of the lead wire 39 is hooked onto the protrusion.

[0076] In this embodiment, the tip portion 39b of the lead wire 39 accommodated in the groove portion 63 on the other circumferential side (-θ) of the two groove portions 63 in one set 63G is hooked onto the first protrusion 65A. Also, the tip portion 39b of the lead wire 39 accommodated in the groove portion 63 on one circumferential side (+θ) of the two groove portions 63 in one set 63G is hooked onto the second protrusion 65B. Note that, if there is an excess portion of the tip portion 39b of the lead wire 39, the excess portion may be cut off and removed during the step of hooking the lead wire 39 onto the protrusion 65A or after the step of hooking the lead wire 39 onto the protrusion 65A is completed.

[0077] According to this embodiment, the lead wire 39 has a connection portion 39a accommodated in the groove portion 63, and a tip portion 39b that is located further tip than the connection portion 39a and that is hooked onto the protrusion 65. A worker or work equipment assembling the electric pump 100 accommodates the connection portion 39a in the groove portion 63 and hooks the tip portion 39b onto the protrusion 65 while applying tension. As a result, a frictional force acts at the contact portion between the lead wire 39 and the protrusion 65, fixing the lead wire 39 to the protrusion 65 and maintaining the tension applied to the connection portion 39a.

[0078] As shown in FIG. 9 , the pressure-contact portion 52 of the terminal member 50 is inserted into the hole 62 of the holding member 60. Accordingly, the connection portion 39a of the lead wire 39 disposed in the hole 62 is inserted into the notch 52a of the pressure-contact portion 52. As a result, the inner edge 52t of the notch 52a is pressed against the outer circumferential surface of the connection portion 39a of the lead wire 39, connecting the connection portion 39a to the pressure-contact portion 52. More specifically, the inner edge 52t of the notch 52a moves downward while rubbing against the surface of the connection portion 39a, thereby partially removing the insulating coating from the surface of the connection portion 39a. This brings the core material of the lead wire 39 into direct contact with the inner edge 52t of the notch 52a, electrically connecting the lead wire 39 and the terminal member 50. Note that, as described above, the insulating coating may be removed in advance. Furthermore, soldering may be performed between the lead wire 39 and the inner edge 52t.

[0079] This connection procedure is performed after the terminal member 50 has been connected to the circuit board 70 and is supported by the board accommodating member 13 (see FIG. 2). Therefore, the reaction force that the terminal member 50 receives from the lead wire 39 when the lead wire 39 is inserted into the cutout portion 52a is received by the stepped surface 13s provided on the terminal support portion 13d of the board accommodating member 13.

[0080] As shown in FIG. 9 , the lead wire 39 of this embodiment is inserted into the notch 52a of the insulation displacement portion 52 with the tip portion 39b hooked onto the protrusion 65, applying tension to the connection portion 39a. Therefore, the connection portion 39a is less likely to sag downward even when subjected to a downward force from the insulation displacement portion 52. As a result, after the insulation displacement portion 52 is inserted into the hole 62, the connection portion 39a can be inserted (press-fitted) sufficiently deeply into the notch 52a, thereby improving the quality of the connection between the terminal member 50 and the lead wire 39. Furthermore, according to this embodiment, the connection portion 39a is supported by the groove 63, so that the connection portion 39a is less likely to shift circumferentially with respect to the notch 52a during the process of inserting the connection portion 39a into the notch 52a. This simplifies the assembly process by an operator or equipment and improves the quality of the connection.

[0081] In this embodiment, at least a portion of the tip portion 39b of the lead wire 39 is disposed between the inner circumferential surface 61b of the holding member main body 61 and the first extending portion 67. According to this embodiment, the tip portion 39b, which is hooked onto the protrusion 65, can be prevented from separating from the inner circumferential surface 61b and becoming detached from the protrusion 65. This improves the workability of the process of winding the tip portion 39b around the protrusion 65 and hooking it thereon. Furthermore, this allows the worker or the work equipment to wind the tip portion 39b around the protrusion 65 with a stronger pull, thereby applying greater tension to the connection portion 39a. This more reliably prevents the connection portion 39a from sagging downward when the insulation displacement portion 52 and the connection portion 39a are connected.

[0082] In the present embodiment, the first extension portion 67 extends in the circumferential direction, in a direction away from the groove portion 63. According to the present embodiment, the first extension portion 67 is provided at the end of the protrusion 65 located on the opposite side of the groove portion 63, thereby preventing the lead wire 39 from coming off the protrusion 65 on the opposite side of the groove portion 63. This makes it easier to apply tension to the lead wire 39 during work, and further makes it less likely that the lead wire 39 will come off the protrusion 65. In addition, according to the present embodiment, the first extension portion 67 is provided at the end of the protrusion 65 located on the opposite side of the groove portion 63, so that the tip portion 39b can be wound around and hooked while maintaining a high tension on the connection portion 39a at the location of the groove portion 63 or the hole 62. This allows the tension of the connection portion 39a to be maintained high, and when the connection portion 39a is inserted (press-fitted) into the cutout portion 52a, the connection portion 39a does not sag, thereby improving the quality of the connection between the cutout portion 52a (terminal member 50) and the connection portion 39a (lead wire 39).

[0083] In this embodiment, the protrusion 65 has a second extension portion 68 that extends from the protrusion main body 66 on the side opposite to the first extension portion 67. According to this embodiment, when the lead wire 39 is wound around the protrusion 65 one or more times, it is possible to prevent the lead wire 39 from coming off the protrusion 65 on the side opposite to the first extension portion 67.

[0084] In this embodiment, of the first extending portion 67 and the second extending portion 68, one (the first extending portion 67) that is disposed away from the groove portion 63 extends longer from the protrusion main body 66 than the other (the second extending portion 68). According to this embodiment, the extending portion (the first extending portion 67) that extends longer is provided at the end of the protrusion 65 located on the opposite side of the groove portion 63, so that the withdrawal wire 39 can be more reliably prevented from coming off the protrusion 65 on the opposite side of the groove portion 63. This makes it easier for the worker to apply tension to the withdrawal wire 39, and further makes it more difficult for the withdrawal wire 39 to come off the protrusion 65.

[0085] In this embodiment, the first extension portion 67 and the second extension portion 68 extend in the circumferential direction relative to the protrusion main body 66. However, the first extension portion 67 and the second extension portion 68 may also extend in the axial direction (up and down direction) relative to the protrusion main body 66.

[0086] In this embodiment, the grooves 63 and the protrusions 65 are disposed at different positions in the circumferential direction. More specifically, the first protrusions 65A are disposed offset to the other circumferential side (-θ) with respect to the grooves 63, and the second protrusions 65B are disposed offset to one circumferential side (+θ) with respect to the grooves 63. According to this embodiment, the lead wires 39 drawn radially inward from the grooves 63 are hooked on the protrusions 65 to apply tension to the lead wires 39, thereby pressing the lead wires 39 not only against the bottom surfaces 63a of the grooves 63 but also against the side surfaces of the grooves 63. This enables the grooves 63 to stably hold the connection portions 39a of the lead wires 39, making it difficult for the lead wires 39 to move within the grooves 63. As a result, in the process of inserting the connection portions 39a into the cutouts 52a, the connection portions 39a are less likely to be displaced in the circumferential direction with respect to the cutouts 52a, simplifying the assembly process by an operator and improving the quality of the connection.

[0087] In the present embodiment, the lower surface 66a of the protrusion main body 66 (i.e., the surface facing the other axial side) is located below (i.e., on the other axial side of) the upper surface 61a of the holding member main body 61. If the lower surface 66a of the protrusion main body 66 is located above the groove 63 provided in the upper surface 61a, when the lead wire 39 is hooked onto the protrusion main body 66 and tension is applied to the lead wire 39, an upward force is applied to the connection portion 39a in the groove 63, which may cause the connection portion 39a to come off the groove 63. According to the present embodiment, the lower surface 66a of the protrusion main body 66 is located below the upper surface 61a of the holding member main body 61, and therefore, when the lead wire 39 is hooked onto the protrusion main body 66, it is possible to prevent the connection portion 39a from coming off the groove 63.

[0088] In this embodiment, the lower surface 66a of the protrusion main body 66 is located lower (i.e., on the other axial side) than the bottom surface 63a facing the upper side (i.e., one axial side) of the groove 63. Therefore, by applying tension to the lead wire 39 and hooking it onto the protrusion main body 66 along the lower surface 66a of the protrusion main body 66, the connection portion 39a of the lead wire 39 can be pressed against the bottom surface 63a of the groove 63. This makes it easier to apply tension to the connection portion 39a, and makes it easier to prevent the connection portion 39a from sagging downward when the insulation displacement portion 52 and the connection portion 39a are connected.

[0089] In this embodiment, the pressure contact portion 52 of the terminal member 50 has a plurality of notches 52a. The holding member 60 has a plurality of protrusions 65. A plurality of grooves 63 overlapping one hole 62 are provided on the upper surface 61a of the holding member main body 61. Furthermore, the tip portions 39b of the different lead wires 39 arranged in the different grooves 63 are hooked onto different protrusions 65. According to this embodiment, it is possible to simultaneously connect a plurality of lead wires 39 to one terminal member 50, and also to connect a plurality of lead wires 39 to one another. This simplifies the assembly process of the electric pump 100.

[0090] In this embodiment, the second surface (inner circumferential surface 61b) on which the protrusions 65 are provided is a surface facing radially inward of the holding member main body 61. However, the protrusions 65 may be provided on a surface facing a direction different from the upper surface 61a on which the holes 62 and the grooves 63 are provided. As an example, the protrusions may be provided on a surface facing radially outward of the holding member main body 61. That is, the holding member main body 61 of this embodiment has an upper surface 61a and a second surface (inner circumferential surface 61b) facing a direction different from the upper surface 61a, and the protrusions 65 protrude from the second surface (inner circumferential surface 61b).

[0091] <Modification> Modified examples of the holding member will be described below. In the following description of each modified example, the same components as those in the embodiment already described will be assigned the same reference numerals and description thereof will be omitted.

[0092] (Variation 1) 10 is a perspective view showing a part of a holding member 160 of Modification 1. The holding member 160 of this modification differs from the above-described embodiment mainly in the shape of the protrusions 165.

[0093] As in the above-described embodiment, the protrusion 165 protrudes radially inward from the inner circumferential surface 61b of the holding member main body 61. The tip portion 39b of the lead wire 39 is hooked onto the protrusion 165.

[0094] The protrusion 165 of this modified example has a protrusion main body 166 and a first extension portion 167. The protrusion main body 166 is connected to the inner circumferential surface 61b of the holding member main body 61. The first extension portion 167 extends circumferentially from the protrusion main body 166. The first extension portion 167 extends circumferentially in a direction away from the groove portion 63. The lead wire 39 drawn radially inward from the groove portion 63 of the holding member main body 61 is guided downward from the groove portion 63, passes below the protrusion main body 166, and passes upward between the first extension portion 167 and the inner circumferential surface 61b of the protrusion main body 166.

[0095] In this modified example, the protrusion main body 166 is provided with a lightening hole 166h and a recessed groove 166g. The lightening hole 166h penetrates the protrusion main body 166 in the axial direction. The recessed groove 166g is provided on the surface of the protrusion main body 166 opposite in the circumferential direction to the side on which the first extending portion 167 is provided. A part of the lead wire 39 that is drawn radially inward from the groove portion 63 and guided downward is inserted into the recessed groove 166g. In this way, the recessed groove 166g guides the lead wire 39 and prevents the lead wire 39 from shifting radially inward when the lead wire 39 is hooked onto the protrusion 165.

[0096] When the holding member 160 of this modified example is viewed from the axial direction, the recessed groove 166g is located on an extension of the groove portion 63. As a result, the lead wire 39 drawn radially inward from the groove portion 63 can be guided downward and inserted directly into the recessed groove 166g. Furthermore, the recessed groove 166g of this modified example does not necessarily have to be located on an extension of the groove portion 63 in the extension direction, but may be positioned at a position offset from the groove portion 63 in the width direction or circumferential direction. When the recessed groove 166g is positioned at a position offset from the groove portion 63 in the width direction or circumferential direction, the lead wire 39 is bent between the groove portion 63 and the recessed groove 166g. As a result, the tip portion 39b of the lead wire 39 is held in the recessed groove 166g while being pressed against the inner surface of the recessed groove 166g. As a result, the frictional force applied to the contact portion between the inner surface of the recessed groove 166g and the tip portion 39b can be increased, and when the pressure-contact portion 52 and the connection portion 39a are connected, the connection portion 39a can be prevented from sagging downward.

[0097] The first extension portion 167 elastically deforms in a direction intersecting the inner circumferential surface 61b of the holding member main body 61. More specifically, the first extension portion 167 is elastically deformable in a direction away from the inner circumferential surface 61b. The tip portion 39b of the lead wire 39 is disposed between the first extension portion 167 and the inner circumferential surface 61b.

[0098] The first extending portion 167 has a holding portion 167a that is connected to the protrusion main body 166 and extends circumferentially from the protrusion main body 166, and a guide portion 167b that extends circumferentially from the tip of the holding portion 167a. The holding portion 167a approaches the inner circumferential surface 61b as it moves away from the protrusion main body 166 in the circumferential direction. On the other hand, the guide portion 167b moves away from the inner circumferential surface 61b as it moves away from the protrusion main body 166 in the circumferential direction. The first extending portion 167 is closest to the inner circumferential surface 61b at a boundary portion 167c between the holding portion 167a and the guide portion 167b. The distance between the first extending portion 167 and the inner circumferential surface 61b at the boundary portion 167c is smaller than the wire diameter of the lead wire 39. In other words, the distance between at least a portion of the first extending portion 167 and the inner circumferential surface 61b is smaller than the wire diameter of the lead wire 39.

[0099] In this modification, the tip portion 39b of the lead wire 39 is disposed between the holding portion 167a and the inner circumferential surface 61b. According to this modification, the distance between the boundary portion 167c and the inner circumferential surface 61b is smaller than the diameter of the lead wire 39, so the lead wire 39 is less likely to move circumferentially from between the holding portion 167a and the inner circumferential surface 61b beyond the boundary portion 167c. Therefore, the lead wire 39 is less likely to come off the holding portion 167a.

[0100] Furthermore, when hooking the tip portion 39b of the lead wire 39 onto the protrusion 165, the worker guides the lead wire 39 in the circumferential direction along the underside of the protrusion main body 166, and then lifts the tip portion 39b upward to guide the tip portion 39b between the guide portion 167b and the inner circumferential surface 61b. By further pulling the tip portion 39b of the lead wire 39 upward, the lead wire 39 comes into contact with the first extending portion 167, and the first extending portion 167 elastically deforms, causing the lead wire 39 to cross the boundary portion 167c. As a result, the tip portion 39b of the lead wire 39 is inserted between the holding portion 167a and the inner circumferential surface 61b.

[0101] In this modification, the first extending portion 167 may be elastically deformed to press the tip portion 39b of the lead wire 39 against the inner circumferential surface 61b. In this case, the first extending portion 167 can more effectively prevent the lead wire 39 from coming off the protrusion 165.

[0102] (Variation 2) 11 is a perspective view showing a part of a holding member 260 of Modification 2. The holding member 260 of this modification differs from the above-described embodiment mainly in the shape and arrangement of the protrusions 265.

[0103] As in the above-described embodiment, the protrusion 265 protrudes radially inward from the inner circumferential surface 61b of the holding member main body 61. The tip portion 39b of the lead wire 39 is hooked onto the protrusion 265.

[0104] The protrusion 265 of this modified example is located radially inside the two groove portions 63 of one set 63G. That is, the circumferential position of the protrusion 265 of this modified example overlaps the circumferential position of the two groove portions 63 of one set 63G.

[0105] The protrusion 265 of this modified example has two gripping portions 269. The gripping portions 269 are notched and extend radially outward from the radially inner tip of the protrusion 265. The two gripping portions 269 are arranged side by side in the circumferential direction. The two gripping portions 269 each sandwich and grip the tip portion 39b of the lead wire 39. The width of the notch in each of the gripping portions 269 is smaller than the diameter of the lead wire 39 in at least a portion thereof. Therefore, the lead wire 39 is press-fitted into the gripping portions 269.

[0106] According to this modified example, by inserting the tip portion 39b of the lead wire 39 into the gripping portion 269, the tip portion 39b can be hooked onto the protrusion 265 without being wrapped around the tip portion 39b, thereby simplifying the assembly process of the electric pump 100.

[0107] When the holding member 260 of this modified example is viewed in the axial direction, the gripping portion 269 is located on an extension of the groove portion 63. According to this modified example, the lead wire 39 drawn radially inward from the groove portion 63 can be guided downward and pressed into the gripping portion 269 as is, thereby simplifying the process of hooking the tip portion 39b of the lead wire 39 on the protrusion 265.

[0108] The gripping portion 269 does not necessarily have to be located on an extension line of the groove 63 in the extending direction, but may be located at a position offset in the width direction or circumferential direction from the groove 63. The gripping portion 269 hooks the tip portion 39b of the lead wire 39 at a position offset in the width direction or circumferential direction from the groove 63, thereby bending the lead wire 39 between the groove 63 and the gripping portion 269. As a result, the tip portion 39b of the lead wire 39 is held by the gripping portion 269 while being pressed against the inner surface of the gripping portion 269. As a result, it is possible to increase the frictional force applied to the contact portion between the inner surface of the gripping portion 269 and the tip portion 39b, and it is possible to prevent the connection portion 39a from sagging downward when the insulation displacement portion 52 and the connection portion 39a are connected.

[0109] As in the above-described embodiment, the insulation displacement portion 52 of the terminal member 50 has a plurality of (two) notches 52a (see FIG. 7). In this modification, a plurality of (two in this modification) grooves 63 overlapping one hole 62 are provided on the upper surface 61a of the holding member main body 61. The protrusion 265 has a plurality of (two in this modification) gripping portions 269. Furthermore, the tip portions 39b of the different lead wires 39 arranged in the different grooves 63 are gripped by the different gripping portions 269. According to this modification, a plurality of lead wires 39 can be simultaneously connected to one terminal member 50, and a plurality of lead wires 39 can also be connected to one another. This simplifies the assembly process of the electric pump 100.

[0110] In this modified example, the lower surface of the protrusion 265 is located below the upper surface 61a of the holding member main body 61. If the lower surface of the protrusion 265 is located above the groove 63 provided in the upper surface 61a, when the lead-out wire 39 is hooked onto the protrusion 265 and tension is applied to the lead-out wire 39, an upward force is applied to the connection portion 39a in the groove 63, which may cause the connection portion 39a to come off the groove 63. According to this modified example, the lower surface of the protrusion 265 is located below the upper surface 61a of the holding member main body 61, and therefore, when the lead-out wire 39 is hooked onto the protrusion 265, it is possible to prevent the connection portion 39a from coming off the groove 63.

[0111] In this modification, the lower surface of the protrusion 265 is located below the bottom surface of the groove 63. Therefore, by applying tension to the lead wire 39 and hooking it onto the protrusion main body 66 along the lower surface of the protrusion 265, the connection portion 39a of the lead wire 39 can be pressed against the bottom surface of the groove 63. This makes it easier to apply tension to the connection portion 39a, and makes it easier to prevent the connection portion 39a from sagging downward when the insulation displacement portion 52 and the connection portion 39a are connected.

[0112] The present invention is not limited to the above-described embodiment, and other configurations and methods may be adopted within the scope of the technical concept of the present invention. For example, the number of terminal members provided on the pump is not limited to three, but may be two or less, or four or more. The number of lead wires connected to the terminal members may be one, or three or more. The method of connecting the terminal portion and the through hole 70h is not limited to press-fitting, and may be other methods such as soldering.

[0113] The use of a motor to which the present invention is applied is not particularly limited. The motor may be mounted in equipment other than an electric pump. The use of an electric pump including a motor to which the present invention is applied is not particularly limited. The type of fluid pumped by the electric pump is not particularly limited, and may be water, for example. The motor and electric pump may be mounted in equipment other than a vehicle. Note that the configurations and methods described in this specification can be combined as appropriate within the scope of not being mutually inconsistent.

[0114] The present technology can be configured as follows. (1) A motor unit having a rotor rotatable about a central axis and a stator facing the rotor across a radial gap; a circuit board located on one axial side of the motor unit; terminal members connecting lead wires extending from the stator to the circuit board; and a holding member located axially between the stator and the circuit board and holding the lead wires, wherein the terminal members have terminal portions located at one axial end and connected to the circuit board, and pressure-contact portions located at the other axial end and connected to the lead wires. the pressure contact portion has a notch that opens to the other axial side and that sandwiches the lead wire at its inner edge; the holding member has a main body portion having a first surface facing one axial side and a second surface facing a direction different from the first surface, and a convex portion that protrudes from the second surface, the first surface having a hole portion into which the pressure contact portion is inserted and a groove portion that extends to overlap with the hole portion; and the lead wire has a connection portion that is housed in the groove portion and connected to the pressure contact portion, and a tip portion that is located further tip than the connection portion and is hooked onto the convex portion. (2) The motor described in (1), wherein the convex portion has a convex portion main body that protrudes toward the second surface and a first extension portion that extends from the convex portion main body in a direction along the second surface, and at least a portion of the tip portion is positioned between the second surface and the first extension portion. (3) The motor described in (2), wherein the distance between at least a portion of the first extension portion and the second surface is smaller than the wire diameter of the lead wire, and the first extension portion elastically deforms in a direction intersecting the second surface. (4) The motor according to (2) or (3), wherein the surface of the protrusion main body facing the other axial direction is located on the other axial direction side of the first surface. (5) The motor according to (4), wherein the surface of the convex portion main body facing the other axial direction is located on the other axial side of the bottom surface of the groove portion facing the one axial side. (6) The motor according to any one of (2) to (5), wherein the second surface is a surface facing in a radial direction, and the first extending portion extends in a circumferential direction in a direction away from the groove portion. (7) The motor according to any one of (2) to (6), wherein the grooves and the protrusions are arranged at different positions in the circumferential direction. (8) A motor described in any one of (2) to (7), wherein the convex portion has a second extension portion extending from the convex portion main body in a direction along the second surface, and the first extension portion and the second extension portion extend in opposite directions to each other. (9) The motor according to (8), wherein one of the first extension portion and the second extension portion that is disposed away from the groove portion extends longer from the protrusion main body than the other of the first extension portion and the second extension portion. (10) A motor described in any one of (1) to (9), wherein the pressure contact portion has a plurality of the notches, the holding member has a plurality of the protrusions, the second surface is provided with a plurality of the grooves extending to overlap one of the holes, and the tip portions of the different lead wires arranged in the different grooves are hooked onto the different protrusions. (11) The motor according to claim 1, wherein the protrusion has a notched gripping portion that sandwiches and grips the tip portion. (12) The motor according to (11), wherein the gripping portion is positioned in a direction in which the groove portion extends when viewed from the axial direction. (13) The motor described in (11) or (12), wherein the pressure contact portion has a plurality of the notches, the second surface is provided with a plurality of the grooves that extend and overlap one of the holes, the protrusion has a plurality of the gripping portions, and the tip portions of the different lead wires that are arranged in the different grooves are gripped by the different gripping portions. (14) An electric pump comprising the motor according to any one of (1) to (13) and a pump mechanism connected to the rotor. [Explanation of symbols]

[0115] 2...motor, 3...motor portion, 20...rotor, 30...stator, 39...lead wire, 39a...connection portion, 39b...tip portion, 40...pump mechanism portion, 50...terminal member, 52...insulation contact portion, 52a...notch portion, 52t...inner edge, 53...terminal portion, 60, 160, 260...holding member, 61...holding member main body portion (main body portion), 61a...top surface (first surface), 61b...inner peripheral surface (second surface), 62...hole portion, 63...groove portion, 63a...bottom surface, 65, 165, 265...protrusion portion, 66, 166...protrusion main body, 67, 167...first extension portion, 68...second extension portion, 70...circuit board, 100...electric pump, 269...gripping portion, G1...gap, J...central axis line

Claims

1. a motor section including a rotor rotatable about a central axis and a stator facing the rotor with a gap in the radial direction; a circuit board located on one axial side of the motor unit; a terminal member that connects a lead wire extending from the stator to the circuit board; a holding member that is positioned between the stator and the circuit board in the axial direction and holds the lead wires, The terminal member is a terminal portion located at one end of the axial direction and connected to the circuit board; a pressure-contact portion located at the other axial end and connected to the lead wire, the pressure-contact portion has a notch that opens to the other axial side and that sandwiches the lead wire at its inner edge, The holding member is a main body portion having a first surface facing one axial side and a second surface facing a direction different from the first surface; a protrusion protruding from the second surface, The first surface has: a hole into which the pressure contact portion is inserted; a groove portion extending to overlap the hole portion, The leader line is a connection portion accommodated in the groove portion and connected to the insulation displacement portion; a tip portion that is located on the tip side of the connecting portion and that is hooked onto the protrusion, Motor.

2. The convex portion is a protrusion main body protruding from the second surface; a first extension portion extending from the protrusion main body in a direction along the second surface, At least a portion of the tip portion is disposed between the second surface and the first extension portion. The motor according to claim 1 .

3. a distance between at least a portion of the first extending portion and the second surface is smaller than a wire diameter of the lead wire; the first extension portion elastically deforms in a direction intersecting the second surface; The motor according to claim 2 .

4. a surface of the protrusion main body facing the other axial direction is located on the other axial side of the first surface; The motor according to claim 2 .

5. a surface of the protrusion main body facing the other axial direction is located on the other axial side of a bottom surface of the groove portion facing the one axial side; 5. The motor according to claim 4.

6. the second surface is a surface facing in a radial direction, The first extension portion extends in a circumferential direction and in a direction away from the groove portion. The motor according to claim 2 .

7. The groove portion and the protrusion portion are disposed at different positions in the circumferential direction. The motor according to claim 2 .

8. the protrusion has a second extension portion that extends from the protrusion main body in a direction along the second surface, The first extension portion and the second extension portion extend in opposite directions. The motor according to claim 2 .

9. one of the first extending portion and the second extending portion that is disposed away from the groove portion extends longer from the protrusion main body than the other of the first extending portion and the second extending portion; The motor according to claim 8.

10. the pressure-contact portion has a plurality of the notches, the holding member has a plurality of the protrusions, The second surface is provided with a plurality of the grooves extending to overlap one of the holes, the tip portions of the different lead lines arranged in the different groove portions are hooked onto the different protrusion portions, respectively; The motor according to claim 1 .

11. The protrusion has a notched gripping portion that pinches and grips the tip portion. The motor according to claim 1 .

12. When viewed from the axial direction, the grip portion is located in a direction in which the groove portion extends. The motor of claim 11.

13. the pressure-contact portion has a plurality of the notches, The second surface is provided with a plurality of the grooves extending to overlap one of the holes, The protrusion has a plurality of the gripping portions, the tip portions of the different lead wires arranged in the different grooves are held by the different holding portions, respectively. The motor of claim 11.

14. A motor according to any one of claims 1 to 13; a pump mechanism connected to the rotor, Electric pump.

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