CN209948879U - Motor and pump device - Google Patents

Abstract

A motor and a pump device, which can avoid resin leakage from the gap between the through hole of the connector and the terminal pin when molding the resin sealing part covering the stator and the connector, thereby saving the manpower for stripping the resin from the terminal pin and maintaining the aesthetic property of the terminal pin. The motor includes a rotor; a stator including a coil; a connector (22) including a housing (220) provided with a through hole (2201) and a terminal pin (221) inserted into the through hole, one end of the terminal pin protruding from the through hole and electrically connected to an external connector, and the other end of the terminal pin electrically connected to the coil; and a resin sealing portion covering at least a part of the coil and a periphery of an opening of the through hole on the other end side of the terminal pin, wherein the through hole includes a large hole portion (2201a) and a small hole portion (2201c) having a smaller cross section than the large hole portion, the small hole portion is closer to one end side of the terminal pin than the large hole portion, and is in contact with the terminal pin over the entire circumference.

Description

Motor and pump device

Technical Field

The present invention relates to a motor having a connector for connecting to an external connector, and also relates to a pump device for pumping fluid by driving an impeller of a pump chamber to rotate by the motor.

Background

Conventionally, there is a pump device that pumps fluid by rotating an impeller by a driving force of a motor. Generally, the pump device comprises: a pump chamber; an impeller disposed in the pump chamber; a motor having an output shaft connected to the impeller and providing a driving force to the impeller; and a housing partitioned into a first space for housing the motor and a second space for housing the impeller.

The motor configured as described above is generally provided with a connector for connecting an external cable and a coil of the stator. The connector includes: a connector housing formed with a through hole; and a terminal pin that is held by penetrating the through hole. As shown in fig. 5, in the conventional connector, the through hole H is generally formed to have a circular cross section and a constant diameter in the axial direction, the terminal pin X is formed to have a square cross section and a constant size in the axial direction, and when the terminal pin X is inserted into the through hole H, a gap J exists between the inner surface of the through hole H and the outer surface of the terminal pin X. Therefore, a step of peeling off the resin that has overflowed from the tip side of the terminal pin X is required after the molding, which increases the number of steps and lowers the production efficiency. In addition, in the process of peeling the resin from the distal end side of the terminal pin X, a part of the resin may remain on the distal end side of the terminal pin X, and the appearance of the terminal pin may be impaired.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a motor and a pump device which can prevent resin from leaking from a gap between a through hole of a connector and a terminal pin when a resin sealing portion covering a stator and the connector is molded, thereby saving labor for peeling the resin from the terminal pin and maintaining the beauty of the terminal pin.

An aspect of the present invention provides a motor, including: a rotor; a stator including a coil; a connector including a housing provided with a through hole and a terminal pin inserted into the through hole, one end of the terminal pin protruding from the through hole and electrically connected to an external connector, and the other end of the terminal pin electrically connected to the coil; and a resin sealing portion that covers at least a peripheral edge of an opening of the through hole on the other end side of the terminal pin and at least a part of the coil, wherein the through hole includes a large hole portion and a small hole portion having a smaller cross section than that of the large hole portion, the small hole portion being closer to one end side of the terminal pin than the large hole portion and abutting against the terminal pin over an entire circumference.

According to the above configuration, the small hole portion abuts against the entire circumference of the tip end portion of the terminal pin without a gap when the terminal pin is inserted into the through hole. Thus, when the connector and the stator are placed in a mold and resin is injected for insert molding, the resin can be prevented from leaking to one end of the terminal pin connected to an external connector (specifically, an external cable) through a gap between the terminal pin and the through hole. This eliminates the need for a subsequent step of peeling the resin from one end of the terminal pin, thereby saving labor. Moreover, the condition that resin is remained at one end of the terminal pin to cause the unaesthetic appearance of a finished product can be avoided.

The utility model discloses a motor of second aspect is in the utility model discloses a on the basis of the motor of first aspect, the transversal of perforating hole is personally submitted circularly, the transversal square of personally submitting of terminal pin.

According to the above configuration, the through hole is formed to have a circular cross section, and the terminal pin is formed to have a square cross section, whereby the terminal can be smoothly inserted into the through hole.

The motor of the third aspect of the present invention is the motor of the second aspect of the present invention, wherein the diameter of the small hole portion is equal to the side length of the cross section of the terminal pin.

According to the above configuration, by forming the diameter of the small hole portion to be equal to the side length of the terminal pin, each side of the terminal pin can be interference-fitted with the cylindrical inner surface of the small hole portion when the terminal pin is inserted into the small hole portion, and a gap can be surely eliminated between each side of the terminal pin and the inner surface of the small hole portion. This can reliably prevent the resin from flowing out to one end of the terminal pin from the gap between the small hole portion and the terminal pin.

The motor according to a fourth aspect of the present invention is the motor according to the third aspect of the present invention, wherein the through hole is provided with a taper hole portion having a diameter that decreases with the orientation of the taper hole portion between the small hole portion and the large hole portion.

According to the above configuration, the tapered hole portion whose diameter decreases toward the small hole portion is provided between the large hole portion and the small hole portion, whereby the terminal pin can be smoothly inserted from the large hole portion to the small hole portion.

The motor of the fifth aspect of the present invention is the motor of the fourth aspect, wherein the large hole portion is larger in length than the small hole portion.

According to the above configuration, by setting the length of the large hole portion to be larger than the length of the small hole portion, the length of the interference fit portion between the terminal pin and the small hole portion can be shortened, and thereby the terminal pin can be prevented from being deformed by the interference fit.

In the motor according to the sixth aspect of the present invention, in addition to the motor according to the fifth aspect of the present invention, the terminal pin is inserted into the through hole from the large hole portion to the small hole portion.

According to the above configuration, the terminal pin can be smoothly inserted into the through hole by inserting the terminal pin into the through hole so that the large hole portion is directed toward the small hole portion.

In the motor according to the seventh aspect of the present invention, the terminal pin has one end formed with a sharp portion.

According to the above configuration, since the tapered portion is formed at the one end of the terminal pin, the insertion resistance when the terminal pin is inserted into the through hole can be reduced, and thus the terminal pin can be smoothly inserted into the small hole portion.

The motor of the eighth aspect of the present invention is the motor of any one of the first to seventh aspects of the present invention, wherein the connector is formed integrally with the resin seal portion in a radial outer side of the stator, and the one end of the terminal pin is along an axial extension of the stator.

According to the above configuration, the connector and the stator are integrally formed by the resin sealing portion, so that the electrical connection between the terminal pin and the stator can be stably ensured.

The motor of the ninth aspect of the present invention is the motor of any one of the first to seventh aspects of the present invention, wherein the stator includes a circular stator core, the coil is wound around the stator core, and the rotor is inserted into the hollow portion of the stator core.

According to the above configuration, the stator is formed of an annular stator core, the coil is wound around the stator core, and the rotor is inserted into the hollow portion of the stator core, whereby the rotational driving force can be generated by electromagnetic induction between the stator and the rotor.

The pump device of the tenth aspect of the present invention includes: the motor of any one of the first to ninth aspects; a pump chamber; and an impeller disposed in the pump chamber, wherein an output shaft of the motor extends from outside the pump chamber into the pump chamber, and is connected to the impeller.

According to the above configuration, the pump device is provided with the motor, the pump chamber, and the impeller according to any one of the first to ninth aspects, whereby the function of the pump device for pumping fluid can be realized. Further, when the resin sealing portion of the motor is molded, the resin can be prevented from leaking from the connector of the motor, and thus the motor and the external cable can be electrically connected smoothly.

Drawings

Fig. 1 is an exploded perspective view showing a schematic structure of a motor.

Fig. 2 is a sectional view showing a pump apparatus including a motor, which shows in detail the manner in which a connector is connected to a stator of the motor.

Fig. 3A is a partially enlarged view showing a specific structure of the connector, and fig. 3B is a perspective view of the connector viewed from the opposite side to the output side.

Fig. 4 is a schematic diagram showing a structure of a through hole into which a terminal pin is inserted in the connector.

Fig. 5 is a schematic diagram showing a structure of a through hole into which a terminal pin is inserted in a conventional connector.

Description of the symbols

1a pump device;

2, a motor;

20 a rotor;

201 an output shaft;

202 a rotor body;

203 a magnet;

204 a holding member;

205 a first bearing plate;

206 a second bearing plate;

21a stator;

210 a coil;

211 a stator core;

212 an annular portion;

213 salient pole portions;

213a inner peripheral side end surface;

214 an insulator;

214a cylindrical portion;

214b inner peripheral side edge portion;

214c outer peripheral side edge portions;

214d connecting part;

22 a connector;

220 a housing;

2201 through hole;

2201a large hole part;

2201b taper hole parts;

2201c small hole part;

2202 a frame portion;

2203 closing the lock part;

2204 an extension part;

2205 a first wall portion;

2206 a second wall portion;

2207 a third wall portion;

2208 a fourth wall portion;

221a terminal pin;

221a first portion;

221b second portion;

221c a third portion;

3a motor housing;

31 a resin sealing part;

32 a cover member;

4, an impeller;

5 a pump housing;

6 a pump chamber;

an end of the first portion of the M1 terminal pin;

an end of the third portion of the M2 terminal pin;

an L axis;

the L1 motor output side (one side in the axial direction);

the opposite side (the other side in the axial direction) of the output of the L2 motor;

an X terminal pin;

h through holes;

j gap.

Detailed Description

Hereinafter, the motor 2 and the pump device 1 including the motor 2 according to the present invention will be described in detail with reference to fig. 1 to 5. In the drawings, the axis of the motor 2 is L, the motor output side in the L direction is L1 side (i.e., the upper side in the drawings), and the opposite side to the motor output in the L direction is L2 side (i.e., the lower side in the drawings). Fig. 1 is an exploded perspective view showing a schematic structure of a motor. Fig. 2 is a sectional view showing a pump apparatus including a motor, which shows in detail the manner in which a connector is connected to a stator of the motor. Fig. 3A is a partially enlarged view showing a specific structure of the connector, and fig. 3B is a perspective view of the connector viewed from the opposite side to the output side. Fig. 4 is a schematic diagram showing a structure of a through hole into which a terminal pin is inserted in the connector. Fig. 5 is a schematic diagram showing a structure of a through hole into which a terminal pin is inserted in a conventional connector.

As shown in fig. 1 and 2, the motor 2 includes: a rotor 20; a stator 21, the stator 21 including a coil 210; a connector 22, the connector 22 including a housing 220 and a terminal pin 221, wherein the housing 220 is provided with a through hole 2201, the terminal pin 221 is inserted into the through hole 2201, and one end of the terminal pin protrudes from the through hole 2201 to be electrically connected to an external connector (specifically, an external cable), and the other end of the terminal pin is electrically connected to the coil 210; and a resin sealing portion 31, the resin sealing portion 31 covering at least a part of the coil 210 and a peripheral edge of an opening of the through hole 2201 on the other end side of the terminal pin 221, the through hole 2201 including a large hole portion 2201a and a small hole portion 2201c having a smaller cross section than the large hole portion 2201a, the small hole portion 2201c being located on the one end side of the terminal pin 221 than the large hole portion 2201c, and abutting against the terminal pin 221 over the entire periphery.

Specifically, as shown in fig. 1, the rotor 20 includes: an output shaft 201; and a rotor body 202 held on the outer peripheral side of the output shaft 201. As shown in fig. 1, the rotor body 202 includes: a ring-shaped magnet 203 surrounding the output shaft 201; and a holding member 204 connecting the output shaft 201 and the magnet 203. The magnet 203 is disposed coaxially with the output shaft 201, and N-poles and S-poles are alternately magnetized in the circumferential direction on the outer circumferential surface of the magnet 203. The output shaft 201 is made of stainless steel.

More specifically, as shown in fig. 2, the rotor body 202 includes: a first bearing plate 205 fixed to the L1-side portion of the holding member 204; and a second bearing plate 206 (see fig. 2) fixed to the L2-side portion of the holding member 24 in correspondence with the first bearing plate 205. The first bearing plate 205 and the second bearing plate 206 are substantially circular metal plates, and in this embodiment, are metal washers. As shown in fig. 2, in a state where the output shaft 201 is inserted through the center hole of the first bearing plate 205, the first bearing plate 205 covers a radially central portion of the holding member 204 from the L1 side. The first bearing plate 205 is held by the holding member 204 via an E-ring, not shown, in a posture orthogonal to the axial direction L. In a state where the output shaft 201 is inserted through the center hole of the second bearing plate 206, the second bearing plate 206 covers the center portion of the holding member 204 in the radial direction from the L2 side.

Further, a specific constituent structure of the stator 21 is shown in fig. 1, and a connection manner between the stator 21 and the connector 22 is shown in fig. 3A.

Specifically, as shown in fig. 1, the stator 21 includes a stator core 211, and the stator core 211 is a laminated core formed by laminating thin magnetic plates made of a magnetic material. Stator core 211 has: the annular portion 212; and a plurality of salient pole portions 213 protruding radially inward from the annular portion 212. The plurality of salient pole portions 213 are formed at equal angular pitches and arranged at a constant pitch in the circumferential direction. In the present embodiment, the plurality of salient pole portions 213 are formed at an angular pitch of 40 ° centered on the axis L. Thus, the stator core 211 has nine salient poles 213. An inner circumferential end surface 213a of the salient pole portion 213 is an arc surface centered on the axis L and faces the outer circumferential surface of the magnet 203 of the rotor 20 with a slight gap therebetween.

As shown in fig. 1, the stator 21 includes a plurality of insulating members 214, and each insulating member 214 is made of resin and has insulating properties. Each of the insulators 214 is formed in a cylindrical shape with a flange having a flange portion at both ends in the radial direction, and the insulator 214 formed in the cylindrical shape is attached to the salient pole portion 213 so that the axial direction thereof coincides with the axial direction of the stator 21. That is, as shown in fig. 3A, each of the insulators 214 has: a cylindrical portion 214a into which the salient pole portion 213 is inserted; an inner peripheral edge portion 214b extending from an inner peripheral end portion of the cylindrical portion 214 a; and an outer peripheral edge portion 214c extending from an outer peripheral end portion of the cylindrical portion 214 a. Although not shown, the outer peripheral edge portion 214c covers the upper surface of the annular portion 212 of the stator core 211 to a position halfway in the radial direction.

Here, as shown in fig. 3A and 3B, among the plurality of insulating members 214, the insulating member 214 located radially inside the connector 22 is integrally formed with the housing 220 of the connector 22. That is, the insulator 214 closest to the connector 22 and the housing 220 are integrally molded from resin. As shown in fig. 3A and 3B, the insulator 214 integrally formed with the housing 220 has a connecting portion 214d extending from the outer peripheral side edge portion 214c to the outer peripheral side along the lower end surface of the annular portion 212 of the stator core 211 and continuous with the connector 22.

The plurality of coils 210 are wound around the plurality of salient pole portions 213 via the insulating material 214. Each of the coils 210 wound around the salient pole portions 213 with the insulating material 214 interposed therebetween protrudes upward L1 and downward L2 in the radial direction outward (toward the annular portion 212).

The coil 210 is formed of a conductive wire (coil wire) made of aluminum alloy or copper alloy. In the present embodiment, a wire in which an aluminum alloy is covered with a copper alloy is used. In the present embodiment, the number of the salient pole portions 213, the insulators 214, and the coils 210 is nine. The motor 2 is a three-phase brushless motor, three of the nine coils 210 are U-phase coils, three of the remaining six are V-phase coils, and the remaining other three are W-phase coils, the U-phase coils, the V-phase coils, and the W-phase coils being arranged in order in the circumferential direction. In addition, other configurations are also possible. Three U-phase coils are formed by one wire being sequentially wound around the three salient pole portions 213, three V-phase coils are formed by one wire being sequentially wound around the three salient pole portions 213, and three W-phase coils are formed by one wire being sequentially wound around the three salient pole portions 213. The ends of the three conductive wires constituting the U-phase coil, the V-phase coil, and the W-phase coil are connected to the terminal pins 221 of the connector 22.

As shown in fig. 2, the motor 2 further includes a motor housing 3, and the motor housing 3 is configured by a resin sealing portion 31 and a cover member 32, wherein the resin sealing portion 31 covers the rotor 20 and the stator 21 from the L2 side so as to abut on the L2 side end portion of the output shaft 201 of the rotor 20, and the cover member 32 covers the rotor 20 and the stator 21 from the L1 side so as to abut on the L1 side end portion of the output shaft 201 of the rotor 20.

According to the above configuration, the motor case that houses the rotor 20 and the stator 21 is formed by the resin sealing portion 31 and the cover member 32, whereby the electromagnetic induction between the stator and the rotor can be prevented from being affected by other elements.

As shown in fig. 1 and 3A, the connector 22 is located radially outside the stator 21, and includes: a housing 220 formed integrally with the insulator 214 of the stator 21; and three terminal pins 221, the three terminal pins 221 being attached to the housing 220.

Specifically, as shown in fig. 3A, the housing 220 includes: a frame portion 2202 having a substantially rectangular hollow shape when viewed in the direction of the axis L, and a blocking portion 2203 in which the L1 side opening of the frame portion 2202 is blocked by the blocking portion 2203; and an extension 2204, the extension 2204 extending from the radially outer side to the radially inner side of the stator core 211 and being continuous with the insulator 214 of the stator 21.

As shown in fig. 3B, the frame 2202 has a substantially rectangular cross section when viewed from the bottom of the L2 side, and includes: a first wall portion 2205, the first wall portion 2205 constituting a long side of the rectangular cross section of the frame portion 2202 on the side of the stator core 211; a second wall 2206, the second wall 2206 being parallel to and opposed to the first wall 2205 and constituting a long side of the rectangular cross section on the side away from the stator core 211; a third wall portion 2207, the third wall portion 2207 being connected to one end in the depth direction of the paper surface of the first wall portion 2205 and the second wall portion 2206 and constituting one short side of the rectangular cross section; and a fourth wall 2208, wherein the fourth wall 2208 is parallel to and opposite to the third wall 2207, and forms the other short side of the rectangular cross section.

Here, the first wall 2205 to the fourth wall 2208 are integrally formed, but are not limited thereto, and may be fixed together by other means.

As shown in fig. 2, the terminal pin 221 includes a first portion 221a, a second portion 221b, and a third portion 221c, wherein the first portion 221a extends toward the L2 side through a through hole 2201 formed in the blockade portion 2203, the second portion 221b extends in a substantially radial direction while being exposed to the L1-side end surface of the blockade portion 2203 as shown in fig. 3A, and the third portion 221c is electrically connected to the coil 210 through holes formed in the frame portion 2202 and the resin seal portion 31 as shown in fig. 2.

Here, as shown in fig. 2, an end of the first part 221a connected to the external connector is referred to as "M1", and an end of the third part 221c connected to the coil of the stator 21 is referred to as "M2".

Fig. 4 is a schematic diagram showing a configuration of the through hole 2201 of the locking portion 2203 that receives and holds the first portion 221a of the terminal pin. The insertion direction of the terminal pin 221 into the through hole 2201 is parallel to the axis L direction, that is, the first portion 221a of the terminal pin 221 is inserted into the through hole 2201 from the L1 side to the L2 side. The through-hole 2201 includes, from the L1 side to the L2: a large hole portion 2201a, the cross section of the large hole portion 2201a is circular, and the diameter is slightly larger than the side length of the square cross section of the terminal pin 221; a taper portion 2201b, the taper portion 2201 having a circular cross section and a diameter gradually decreasing from the L1 side to the L2 side; and a small hole portion 2201c, the small hole portion 2201c having a circular cross section and a diameter equal to the side length of the square cross section of the terminal pin 221.

According to the above configuration, since the through-hole 2201 includes the large hole 2201a, the tapered hole 2201b and the small hole 2201c, and the one end M1 of the terminal pin 221 is inserted into the through-hole 2201 from the L1 side to the L2 side, when the resin seal portion 31 for sealing the stator 21 and the connector 22 is molded, the one end M1 of the terminal pin 221 abuts against the small hole 2201c without a gap over the entire circumference, and therefore, the resin can be prevented from leaking out to the one end M1 side of the terminal pin 221 from the gap between the one end M1 of the terminal pin 221 and the small hole 2201 c. This eliminates the need for a person to peel the leaked resin from the one end M1 of the terminal pin 221, and the appearance of the molded resin seal portion can be maintained.

Further, as shown in fig. 2, the resin sealing portion 31 covers the periphery of the opening of the through hole 2201 near the end M2 of the terminal pin 221 and at least a part of the coil 210, so that the terminal pin 221 and the coil 210 can be prevented from directly contacting the table when the motor 2 is placed on the table, and the terminal pin 221 and the coil 210 can be prevented from being damaged.

In the present embodiment, the terminal pin 221 has a square cross section, and the through-hole 2201 has a circular cross section. This allows the terminal pin 221 to be smoothly inserted into the through-hole 2201 in preparation for interference fitting of the terminal pin 221 with the through-hole 2201.

In the present embodiment, the diameter of the small hole 2201c is equal to the side length of the terminal pin 221. Thus, in the process of inserting the terminal pin 221 into the small hole portion 2201c, the four corners of the terminal pin 221 are respectively pushed out of the small hole portions 2201c, and the small hole portions 2201c plastically deform outward while applying a reaction force to the terminal pin 221, the reaction force causing the small hole portions 2201c to closely contact the terminal pin 221, whereby a sufficient condition can be provided for interference fitting of the terminal pin 221 and the small hole portions 2201 c.

In the present embodiment, the through-hole 2201 is provided with a taper portion 2201b having a diameter decreasing toward the small hole portion 2201c between the small hole portion 2201c and the large hole portion 2201 a. This enables the terminal pin 221 to be smoothly inserted from the large hole 2201a into the small hole 2201 c.

In the present embodiment, the length of the large hole 2201a is greater than the length of the small hole 2201 c.

According to the above configuration, by setting the length of the large hole 2201a to be longer than the length of the small hole 2201c, the length of the interference fit portion between the terminal pin 221 and the small hole 2201c can be shortened, and thus, the terminal pin 221 can be prevented from being deformed by the interference fit.

In the present embodiment, the terminal pins 221 are inserted into the plurality of through holes 2201 from the large hole 2201a to the small hole 2201 c.

According to the above configuration, the terminal pin 221 is inserted into the through hole 2201 so that the large hole 2201a faces the small hole 2201c, whereby the terminal pin 221 can be smoothly inserted into the through hole 2201.

In the present embodiment, one end of the terminal pin 221 is formed with a tapered portion.

According to the above configuration, the one end of the terminal pin 221 is formed with the tapered portion, so that the insertion resistance when the terminal pin 221 is inserted into the through-hole 2201 can be reduced, and thereby the deformation of the terminal pin 221 due to the excessive frictional force between the end portion M1 of the terminal pin 221 and the wall portion of the through-hole 2201 can be reduced as much as possible.

Further, in the present embodiment, the connector 22 is integrally formed on the radial outside of the stator 21 by the resin seal portion 31, and the end portion M1 of the first portion 221a of the terminal pin 221 extends in the direction of the axis L of the stator 21.

According to the above configuration, the connector 22 is formed integrally with the stator 21 by the resin sealing portion 31, and the end M1 of the first portion 221a of the terminal pin 221 is extended toward the L2 side of the stator 21, whereby the electrical connection between the terminal pin 221 and the stator 21 can be stably secured.

In the present embodiment, as shown in fig. 1 and 2, the stator 21 includes an annular stator core 211, the coil 210 is wound around the stator core 211, and the rotor 20 is inserted into a hollow portion of the stator core 211 so as to be rotatable with respect to an inner circumferential end surface 213a of a salient pole portion 213 of the stator core 211 of the stator 21.

According to the above configuration, the stator 21 is formed to include the annular stator core 211, the coil 210 is wound around the stator core 211, and the rotor 20 is inserted into the hollow portion of the stator core 211, whereby the driving force for driving the impeller 4 to rotate can be generated by electromagnetic induction between the stator 21 and the rotor 20.

Furthermore, as shown in fig. 2, the present invention also provides a pump device 1, wherein the pump device 1 further includes, in addition to the motor 2 described above: an impeller 4, the impeller 4 being rotatably attached to an output shaft 201 of the rotor 20; a pump housing 5, the pump housing 5 housing the motor 2 and the impeller 4; and a pump chamber 6, the pump chamber 6 being constituted by the pump housing 5 and the motor housing 3 to form a space for accommodating the impeller 4.

According to the above configuration, by configuring the pump device 1 to include the motor 2, the impeller 4, the pump housing 5, and the pump chamber 6, the impeller 4 is driven to rotate by the driving force generated by the motor 2, and the fluid in the pump chamber 6 can be pumped. Thus, the fluid pumping function of the pump device can be smoothly realized.

Although the embodiments of the present invention have been described above, elements of the embodiments may be changed or deleted in addition to the technical means described in the embodiments without departing from the spirit of the present invention.

In the above embodiment, the terminal pin 221 has a square cross section and the through hole 2201 has a circular cross section, but the present invention is not limited to this, and other shapes may be used as long as they can be fitted to each other by interference fit.

In the above-described embodiment, the through-hole has the taper portion formed between the small hole portion and the large hole portion, but the through-hole is not limited to this, and may have a hole portion of another shape, or may include only the large hole portion and the small hole portion without a transition portion.

In the above embodiment, the terminal pin has one end formed with the tapered portion, but the terminal pin is not limited to this and may be formed in other shapes.

In the above embodiment, the number of the terminal pins and the through holes is three, but the number is not limited to this, and other numbers may be used.

In the above embodiment, the through hole 2201 through which the terminal pin 221 passes is formed in the sealing portion 2203 of the housing 220, but the present invention is not limited to this, and may be formed in another portion of the housing 220.

In the above embodiment, the first portion 221a, the second portion 221b, and the third portion 221c are integrally formed with the housing 220, but the present invention is not limited thereto, and the housing 220 may be formed by separately mounting the three portions.

Claims (10)

1. A motor, comprising:

a rotor;

a stator including a coil;

a connector including a housing provided with a through hole and a terminal pin inserted into the through hole, one end of the terminal pin protruding from the through hole and electrically connected to an external connector, and the other end of the terminal pin electrically connected to the coil; and

a resin sealing portion that covers at least a peripheral edge of an opening of the through hole on the other end side of the terminal pin and at least a part of the coil,

the through-hole includes a large hole portion and a small hole portion having a smaller cross section than the large hole portion,

the small hole portion is closer to one end side of the terminal pin than the large hole portion, and abuts against the terminal pin over the entire circumference.

2. The motor of claim 1,

the cross section of the through hole is circular,

the cross section of the terminal pin is square.

3. The motor of claim 2,

the diameter of the small hole portion is equal to the side length of the cross section of the terminal pin.

4. The motor of claim 3,

the taper hole portion having a diameter decreasing toward the small hole portion is provided between the through hole portion and the large hole portion.

5. The motor of claim 4,

the large hole portion has a length greater than that of the small hole portion.

6. The motor of claim 5,

the terminal pin is inserted into the through hole in a direction from the large hole portion to the small hole portion.

7. The motor of claim 1,

one end of the terminal pin is formed with a tapered portion.

8. The motor according to any one of claims 1 to 7,

the connector is integrally formed on a radially outer side of the stator through the resin sealing portion,

the one end of the terminal pin extends in an axial direction of the stator.

9. The motor according to any one of claims 1 to 7,

the stator includes a circular ring-shaped stator core,

the coil is wound on the stator core,

the rotor is inserted into the hollow portion of the stator core.

10. A pump apparatus, comprising:

comprising the motor of any one of claims 1 to 9;

a pump chamber; and

an impeller disposed within the pump chamber,

an output shaft of the motor extends from outside of the pump chamber into the pump chamber and is connected to the impeller.

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