CN210744904U - Motor with a stator having a stator core - Google Patents

Abstract

A motor is provided, which contributes to miniaturization and improves assembly efficiency. The motor of the utility model comprises a motor main body, a connector part and a housing, wherein the motor main body is provided with a stator and a rotor, the rotor is supported by a bearing to rotate around a central axis extending along the up-down direction relative to the stator, the connector part is provided with a connector which is electrically connected with the stator and is used for connecting external equipment and a connector bracket which covers at least one part of the connector, the housing receives the motor main body and the connector part, wherein the bearing includes a first bearing as a rolling bearing, the connector holder has a first bearing holding portion that holds the first bearing, an elastic member is provided between the first bearing holding portion and an outer ring of the first bearing in an axial direction which is an extending direction of the central axis, the first bearing biases the connector holder downward via the elastic member, and the housing and/or the stator support the connector holder from below the connector holder.

Description

Motor with a stator having a stator core

Technical Field

The utility model relates to a motor.

Background

A motor generally includes a stator having an iron core and a coil wound around the iron core, a rotor having a shaft and a magnet provided on the shaft and supported by a bearing so as to be rotatable with respect to the stator about the shaft as a center axis, and a housing that houses the stator and the rotor.

In order to supply power to the motor, a power supply line may be provided in the housing, one end of which is electrically connected to the coil of the stator and the other end of which leads to an opening provided in the housing, and a holder may be provided in the housing in the vicinity of the opening to hold a position of a portion of the power supply line exposed from the opening, in order to facilitate connection to an external device.

However, in the motor, since the bracket for supporting the power supply line is usually fixed to the housing by a screw member such as a screw, it is necessary to provide a screw seat surface on each of the bracket for supporting the power supply line and the housing, which tends to increase the size of the motor and to reduce the assembly efficiency.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above problems, and an object of the present invention is to provide a motor which can contribute to miniaturization and improve assembly efficiency.

In order to achieve the above object, the present invention provides a motor including a motor main body having a stator and a rotor supported by a bearing so as to be rotatable with respect to the stator about a central axis extending in an up-down direction, a connector portion having a connector electrically connected to the stator and for connection to an external device and a connector holder covering at least a part of the connector, and a housing accommodating the motor main body and the connector portion, wherein the bearing includes a first bearing as a rolling bearing, the connector holder has a first bearing holding portion holding the first bearing, an elastic member is provided between the first bearing holding portion and an outer ring of the first bearing in an extending direction of the central axis, that is, an axial direction, the first bearing applies a force downward to the connector holder via the elastic member, the housing and/or the stator support the connector holder from below the connector holder.

According to the motor of the present invention, the connector holder has a first bearing holding portion for holding the first bearing, an elastic member is provided between the first bearing holding portion and an outer ring of the first bearing in an axial direction, which is an extending direction of the central axis, the first bearing biases the connector holder downward via the elastic member, the housing and/or the stator supports the connector holder from below the connector holder, therefore, compared with the case that the connector bracket is fixed to the housing by a screw member such as a screw, the space occupied by the screw seat surface provided on the connector bracket and the housing can be saved, the miniaturization can be realized, and the pre-compression applied by the elastic member easily fixes the connector holder in the housing efficiently and stably, further, the number of components can be reduced as compared with a case where a component for holding the bearing is separately provided, which contributes to improvement of manufacturing efficiency. And in the working process of the motor, the axial movement of the motor can be effectively absorbed, so that the running state of the motor is more stable.

In the motor of the present invention, it is preferable that the elastic member is a wave washer.

According to the utility model discloses a motor, elastic component is the wave form packing ring, consequently, realizes the miniaturization of axial dimension easily.

In the motor of the present invention, it is preferable that a circuit board is housed in the housing, the circuit board controls driving of the motor, and the connector holder supports the circuit board from below the circuit board.

According to the utility model discloses a motor, the circuit board has been accomodate in the shell, and the circuit board carries out drive control to the motor, and the connector support is from the below supporting circuit board of circuit board, consequently, compares with the condition that sets up the part that carries out the support to the circuit board in addition, can reduce part quantity, helps improving manufacturing efficiency.

In the motor of the present invention, it is preferable that a sensor rotor is mounted on the rotor, and the sensor rotor is opposed to the circuit board above the circuit board with a space therebetween.

According to the utility model discloses a motor installs the sensor rotor on the rotor, and the sensor rotor separates the interval relative with the circuit board in the top of circuit board, and consequently, utilizes the connector support to maintain circuit board and sensor rotor at the ascending distance of axial easily to improve the detection precision of sensor.

Further, in the motor of the present invention, it is preferable that the connector holder includes: an inner annular portion constituting the first bearing holding portion; an outer annular portion located on an outer peripheral side of the inner annular portion and connected to the inner annular portion via a connecting portion; and a block portion that protrudes from the outer annular portion toward an outer circumferential side and covers at least a part of the connector, the housing including: a case main body that houses the stator, the rotor, the inner annular portion, and the outer annular portion, the case main body abutting below the outer annular portion; and a cover that protrudes from the case main body toward an outer peripheral side and that houses at least a part of the block portion.

According to the utility model discloses a motor, the connector support can realize the support of first bearing simultaneously, for the location of shell main part and the maintenance to the connector including the power supply line etc. that is to say, when utilizing inboard cyclic annular portion to support first bearing, can utilize outside cyclic annular portion to realize for the location of shell main part, and can utilize the cubic portion to keep the connector including the power supply line etc. consequently, help further reducing the part quantity, simplify the equipment operation, improve manufacturing efficiency.

In the motor of the present invention, it is preferable that the block portion has a downward projecting portion extending downward, and the downward projecting portion abuts on an upper side of the cover.

According to the utility model discloses a motor, cubic portion have the below protruding portion that extends downwards, below protruding portion butt in the top of cover, consequently, utilize the below protruding portion to realize the location of connector support in the axial easily, improved design size's degree of freedom.

In the motor of the present invention, it is preferable that a circuit board is housed in the housing, the circuit board controls driving of the motor, the block portion has an upper protruding portion extending upward, and the upper protruding portion abuts against a lower portion of the circuit board.

According to the utility model discloses a motor, the circuit board has been accomodate in the shell, and the circuit board carries out drive control to the motor, and the cubic portion has the top protruding portion that extends up, and top protruding portion butt is in the below of circuit board, because the cubic portion is accomodate in cover body, and the position is more reliable, consequently, utilizes the top protruding portion can realize the circuit board at the ascending reliable location of axial.

Further, in the motor of the present invention, it is preferable that the bearing includes a second bearing serving as a rolling bearing located below the first bearing, the housing has a second bearing holding portion for holding the second bearing, the second bearing holding portion has an inner peripheral surface abutting on an outer periphery of an outer ring of the second bearing and a support surface abutting on a lower side of the outer ring of the second bearing, an annular groove is provided in a position above the second bearing on the inner peripheral surface of the second bearing holding portion, an annular member is attached to the annular groove, and the annular member abuts on a lower side of the outer ring of the second bearing.

According to the motor of the present invention, the bearing includes the first bearing and the second bearing which is lower than the first bearing, so that the rotor can be stably supported in the up-down direction by the bearing; the housing has a second bearing holding portion having a bearing surface abutting against a lower portion of an outer ring of the second bearing, an annular groove is provided in an inner peripheral surface of the second bearing holding portion at a position above the second bearing, and an annular member abutting against an upper portion of the outer ring of the second bearing is installed in the annular groove, so that the second bearing can be axially supported by the bearing surface of the second bearing holding portion and the annular member, and the first bearing and the second bearing are fixed to the shaft, whereby axial position limitation of the motor rotor can be realized without using other members by axially limiting the first bearing and the second bearing, and further axial position limitation of the connector bracket can be realized, and axial play of the motor can be effectively absorbed; in particular, since the axial direction coincides with the vertical direction, the force with which the annular member presses the second bearing from above is small as compared with the force with which the bearing surface of the second bearing holding portion supports the second bearing from below due to the action of gravity, and therefore, the annular member having a small strength can be used, which contributes to reduction in manufacturing cost.

Further, in the motor of the present invention, it is preferable that the housing has: a case main body that houses the motor main body; and a cover that protrudes from the case main body toward an outer peripheral side and that houses the connector, the case main body including: the second bearing retainer; a bottom portion that expands from an outer peripheral edge of the second bearing retainer toward an outer peripheral side; and a main body portion that is cylindrical and extends upward from an outer peripheral edge of the bottom portion, wherein the annular groove is provided at a position on an upper surface side of the bottom portion in the axial direction.

According to the present invention, the annular groove is provided at the position on the upper surface side of the bottom portion, and therefore, the portion of the second bearing holding portion that holds the second bearing is easily prevented from generating a thin-walled portion having a smaller thickness in the radial direction, that is, even if the housing is made with a fixed thickness, the annular groove for fixing the annular member can be provided on the second bearing holding portion while ensuring the strength of the second bearing holding portion.

(effects of utility model)

According to the utility model, the connector bracket is provided with a first bearing holding part for holding the first bearing, an elastic member is provided between the first bearing holding portion and an outer ring of the first bearing in an axial direction, which is an extending direction of the central axis, the first bearing biases the connector holder downward via the elastic member, the housing and/or the stator supports the connector holder from below the connector holder, therefore, compared with the case that the connector bracket is fixed to the housing by a screw member such as a screw, the space occupied by the screw seat surface provided on the connector bracket and the housing can be saved, the miniaturization can be realized, and the pre-compression applied by the elastic member easily fixes the connector holder in the housing efficiently and stably, further, the number of components can be reduced as compared with a case where a component for holding the bearing is separately provided, which contributes to improvement of manufacturing efficiency. And in the working process of the motor, the axial movement of the motor can be effectively absorbed, so that the running state of the motor is more stable.

Drawings

Fig. 1 is a perspective view schematically showing a motor according to an embodiment of the present invention.

Fig. 2 is a sectional perspective view schematically showing a motor according to an embodiment of the present invention.

Fig. 3 is a partially enlarged view of a portion in a broken line frame of fig. 2.

Fig. 4 is a partial side sectional view schematically showing a motor according to an embodiment of the present invention.

Fig. 5 is a perspective view schematically showing a connector holder included in a motor according to an embodiment of the present invention, and shows the connector holder as viewed from the upper side.

Fig. 6 is a perspective view schematically showing a connector holder included in a motor according to an embodiment of the present invention, and shows a state viewed from a lower side.

(symbol description)

100 motor

110 motor body

111 stator

1111 stator iron core

1112 coil

112 rotor

1121 shaft

11211 first shaft part

11212 second shaft part

1122 magnet

113 circuit board

114 bearing

1141 first bearing

1142 second bearing

115 sensor rotor

116 elastic component

120 connector part

121 connector

12111 coil connecting part

12112 power supply connection part

130 outer casing

131 shell main body

1311 bearing holding part

13111 inner peripheral surface

13112 bearing surface

1312 bottom part

1313 main body part

13131 small diameter portion

13132 middle diameter part

13133 big diameter part

132 cover

140 connector holder

141 inner ring part

142 outer ring part

143 connecting part

1431 Circuit Board support

1432 rib

144 block portion

1441 projection

1442 projection

BDP large diameter part

MDP middle diameter part

SDP1 first minor diameter portion

Second minor diameter portion of SDP2

AP axial positioning part

FP flange part

SP tubular part

RG annular groove

RM ring-shaped component

OP1 first opening

OP2 second opening

R1 first groove

R2 second groove

EP end face

TH through hole

L central axis

Detailed Description

Next, a motor according to an embodiment of the present invention will be described with reference to fig. 1 to 6, in which fig. 1 is a perspective view schematically showing a motor according to an embodiment of the present invention, fig. 2 is a sectional perspective view schematically showing a motor according to an embodiment of the present invention, fig. 3 is a partial enlarged view of a part of a dotted line frame of fig. 2, fig. 4 is a partial side sectional view schematically showing a motor according to an embodiment of the present invention, fig. 5 is a perspective view schematically showing a connector holder included in a motor according to an embodiment of the present invention, and shows a situation viewed from an upper side, and fig. 6 is a perspective view schematically showing a connector holder included in a motor according to an embodiment of the present invention, and shows a situation viewed from a lower side.

Here, for convenience of explanation, three directions orthogonal to each other are set as an X direction, a Y direction, and a Z direction, and one side of the X direction is set as X1, the other side of the X direction is set as X2, one side of the Y direction is set as Y1, the other side of the Y direction is set as Y2, one side of the Z direction is set as Z1, the other side of the Z direction is set as Z2, and an extending direction of a central axis line of a rotor of a motor main body is set to coincide with the Z direction, the Z direction coincides with an up-down direction in the drawing, and the Z1 direction corresponds to an upper direction.

The definitions of the directions in the present specification are only for convenience of describing the embodiments of the present invention, and do not limit the directions of the motor and the like in use and manufacture.

(integral Structure of Motor)

As shown in fig. 1 to 4, the motor 100 is attached to an external device (not shown, for example, on the Z1 direction side of the motor 100). The motor 100 includes a motor main body 110, a connector portion 120, and a housing 130, wherein the motor main body 110 has a stator 111 and a rotor 112, the rotor 112 is supported by a bearing 114 so as to be rotatable about a central axis L with respect to the stator 111, the connector portion 120 has a connector 121 electrically connected to the stator 111 and to which an external device is connected, and a connector holder 140 covering at least a part of the connector 121, and the housing 130 houses the motor main body 110 and the connector portion 120; the bearing 114 includes a first bearing 1141 as a rolling bearing, the connector holder 140 includes a first bearing holding portion for holding the first bearing 1141, an elastic member 116 is provided between the first bearing holding portion and an outer ring of the first bearing 1141 in an axial direction which is an extending direction of the central axis L, the first bearing 1141 biases the connector holder 1140 in a Z2 direction side (i.e., downward in the drawing) via the elastic member 116, and the housing 130 supports the connector holder 140 from a Z2 direction side of the connector holder 140.

Here, as shown in fig. 2 to 4, the connector 121 has a coil connection portion 12111 connected to the coil 1112 of the stator 111 and a power supply connection portion 12112 connected to an external device.

Further, the housing 130 has a case main body 131 and a cover 132 that are integrally formed, in which the case main body 131 has a cylindrical shape extending along the central axis L and opening to at least one side in the extending direction of the central axis L and houses the motor main body 110, and the cover 132 protrudes outward in the radial direction from the case main body 131 and opens in a direction perpendicular to the central axis L and houses at least a part of the connector portion 120.

Further, the elastic member 116 is a wave washer.

(Structure of stator)

As shown in fig. 1 and 2, the stator 111 includes a stator core 1111 and a coil 1112. Stator core 1111 has a ring shape and a plurality of pole teeth (not shown), and an outer peripheral surface of stator core 1111 contacts an inner peripheral surface of case main body 131, and one end surface (i.e., a lower end surface in the drawing) of stator core 1111 contacts a step surface provided on the inner peripheral surface of case main body 131. The coil 1112 is wound around the pole teeth of the stator core 1111 with an insulator interposed therebetween.

(Structure of rotor)

As shown in fig. 1 and 2, the rotor 112 has a shaft 1121. The shaft 1121 is formed in a hollow cylindrical shape extending along the central axis L, and is rotatably supported at both end sides in the extending direction of the central axis L by a first bearing 1141 and a second bearing 1142, respectively, and a magnet 1122 is provided so as to face the tip of the pole tooth of the stator core 1111 in a substantially middle region in the extending direction of the central axis L. Specifically, the shaft 1121 is assembled by a first shaft 11211 and a second shaft 11212 formed by dividing the shaft 1121 in the axial direction, the first shaft 11211 being formed in a hollow cylindrical shape, a first bearing 1141 for supporting the first shaft 11211 to be rotatable from the outer peripheral side of the first shaft 11211 and a substantially annular sensor rotor 115 closer to the Z1 direction side than the first bearing 1141 being provided on the outer peripheral surface of the first shaft 11211, the sensor rotor 115 being opposed to the circuit board 113 at a distance in the Z1 direction (i.e., above in the drawing) of the circuit board 113, a magnet 1122 being provided on the outer peripheral surface of the first shaft 11211 closer to the Z2 direction side than the second bearing 1142 in the extending direction of the central axis L (i.e., on the first bearing 1141 side), the second shaft 11212 being formed in a hollow cylindrical shape closer to the Z2 direction side than the first shaft 11211, and a second shaft 11212 being rotatable from the outer peripheral side of the second shaft 11212 being provided on the outer peripheral surface of the second shaft 11212 In the second bearing 1142, the inner peripheral surface of the second shaft portion 11212 and a portion of the outer peripheral surface of the first shaft portion 11211 in the extending direction of the central axis L are fixed together by welding. More specifically, in the extending direction of the shaft 1121, i.e., in the axial direction, the first shaft portion 11211 and the second shaft portion 11212 are divided at a position between the magnet 1122 and the second bearing 1142; the first shaft 11211 is made of iron, and includes a large diameter portion BDP, a middle diameter portion MDP closer to the Z1 direction side than the large diameter portion BDP and having an outer diameter smaller than the large diameter portion BDP, a first small diameter portion SDP1 closer to the Z1 direction side than the middle diameter portion MDP and having an outer diameter smaller than the middle diameter portion MDP, and a second small diameter portion SDP2 closer to the Z2 direction side than the large diameter portion BDP and having an outer diameter smaller than the middle diameter portion MDP, a magnet 1122 is provided on the outer circumferential surface of the large diameter portion BDP, and a step surface is formed between the middle diameter portion MDP and the first small diameter portion SDP1, and the step surface abuts against a first bearing 1141 as a rolling bearing from the Z2 direction side; the second shaft portion 11212 is made of iron and has a hardness greater than that of the first shaft portion 11211 by heat treatment, an end portion of the second shaft portion 11212 on the first shaft portion 11211 side (i.e., an upper end portion in the drawing) is provided with an axial positioning portion AP against which the second bearing 1142 and the first shaft portion 11211 abut from both sides in the extending direction of the center axis L, the axial positioning portion AP includes a flange portion FP extending from the second shaft portion 11212 toward an outer peripheral side (i.e., a radially outer side) centered on the center axis L, one end surface (i.e., an upper end surface in the drawing) of the flange portion FP in the extending direction of the center axis L against which the first shaft portion 11211 abuts, the other end surface (i.e., a lower end surface in the drawing) of the flange portion FP in the extending direction of the center axis L against which the second bearing 1142 of the rolling bearing abuts, and a cylindrical portion SP extending from an outer peripheral edge of the flange portion toward, the outer peripheral surface of the first shaft 11211 abuts against the inner peripheral surface of the cylindrical portion SP, and the end portion (i.e., the upper end in the drawing) of the cylindrical portion SP on the Z1 direction side is fixed to the first shaft 11211 by laser welding over the entire circumference; the second shaft portion 11212 has an end surface portion EP extending perpendicular to the axial direction toward the central axis L of the shaft 1121, the end surface portion EP has a through hole TH penetrating the end surface portion EP in the axial direction, the portion of the end surface portion EP where the through hole TH is provided is closer to the first shaft portion 11211 than the end portion of the second shaft portion 11212 away from the first shaft portion 11211, and the output shaft of another device not shown can be fixed to the shaft 1121 by inserting the output shaft into the shaft 1121 from the Z1 direction side and screwing a screw or the like not shown into the end portion of the output shaft from the Z2 direction side through the through hole TH.

(Structure of housing)

As shown in fig. 1 and 2, the circuit board 113 is accommodated in the housing 130, the circuit board 113 is disposed on one side (the Z1 direction side, the upper side in the drawing) of the housing 130 in the extending direction of the central axis L, the housing 130 has a first opening OP1 on one side in the extending direction of the central axis L, and the first opening OP1 is formed in a size allowing the circuit board 113 to enter and exit the housing 130.

Specifically, the circuit board 113 is provided on one side of the case main body 131 in the extending direction of the central axis L such that the thickness direction of the circuit board 113 coincides with the extending direction of the central axis L. The case body 131 has a case body side first opening on one side in the extending direction of the central axis L, and the cover 132 has a cover side first opening on one side in the extending direction of the central axis L, the cover side first opening and the case body side first opening communicating and constituting a first opening OP1 together. The connector section 120 falls within the range of the first opening OP1 as viewed in the extending direction of the center axis L, and the connector holder 140 and the circuit board 113 also fall within the range of the first opening OP 1. An annular first groove R1 in which a seal member (not shown) such as a seal ring is disposed is formed in the peripheral edge of the first opening OP 1. The cover 132 has a second opening OP2 at its radially outer end, and an annular second groove R2 in which a seal member (not shown) such as a seal ring is disposed is formed at the periphery of the second opening OP 2. The first groove R1 at least partially overlaps the second groove R2 as viewed in the extending direction of the central axis L.

Further, as shown in fig. 1 and 2, in the housing 130, the housing main body 131 has a bearing holding portion 1311 (a second bearing holding portion in the present invention), a bottom portion 1312, and a main body portion 1313. The bearing holding portion 1311 is in the shape of a tube extending along the center axis L, and holds the second bearing 1142; the bottom portion 1312 spreads from the outer peripheral edge of the bearing holder 1311 toward the outer peripheral side; the body 1311 has a cylindrical shape extending along the center axis L, and extends from the outer peripheral edge of the bottom 1312 toward the Z1 direction (i.e., upward in the drawing). Specifically, the bearing holder 1311 has an inner peripheral surface 13111 that abuts against the outer periphery of the outer ring of the second bearing 1142 and a support surface 13112 that abuts against the Z2 direction side (i.e., the lower side in the drawing) of the outer ring of the second bearing 1142, an annular groove RG is provided at a position on the Z1 direction side of the inner peripheral surface 13111 of the bearing holder 1311 than the second bearing 1142 (in the illustrated example, the annular groove RG is provided at a position on the Z1 direction side surface side of the bottom portion 1312 in the axial direction, and the annular groove RG overlaps with the Z1 direction side surface of the bottom portion 1312 when viewed in the direction perpendicular to the axial direction), an annular member RM such as a metal washer is mounted in the annular groove RG, and the annular member RM abuts against the second bearing 1142 from the Z1 direction side of the second bearing 1142; the bottom portion 1312 extends from the outer peripheral edge of the portion of the bearing holder 1311 on the Z1 direction side toward the outer peripheral side; the main body portion 1313 includes a small diameter portion 13131, an intermediate diameter portion 13132 on the Z1 direction side of the small diameter portion 13131, and a large diameter portion 13133 on the Z1 direction side of the intermediate diameter portion 13132, wherein the Z2 direction side of the small diameter portion 13131 is connected to the outer peripheral edge of the bottom portion 1312, the intermediate diameter portion 13132 has an inner diameter larger than the inner diameter of the small diameter portion 13131, the Z1 direction side is connected to the cover 132, a stepped surface is formed between the small diameter portion 13131 and the intermediate diameter portion 13132, the stepped surface abuts against an end surface of the stator core 1111 on the Z2 direction side from the Z2 direction side, the large diameter portion 13133 has an inner diameter larger than the inner diameter of the intermediate diameter portion 13132, the cover 132 is connected to the Z1 direction side, and a stepped surface is formed between the intermediate diameter portion 13132 and the large diameter portion 13133, and the stepped surface abuts against an end surface of the connector bracket 140 on the Z2 direction side of the outer annular portion 142 described below from the Z2 direction side.

As shown in fig. 1 and 2, in the housing 130, the cover 132 is formed in a substantially rectangular parallelepiped box shape as a whole, and the cover 132 projects from the housing main body 131 toward the outer peripheral side (projects toward the X1 direction side in the illustrated example) and receives at least a part of the connector holder 140 (at least a part of a block portion 144 described below in the illustrated example).

(Structure of connector holder)

As shown in fig. 2, connector holder 140 covers a part of connector 121 so that connector 121 of connector unit 120 is exposed, and housing 130 supports connector holder 140 from the Z2 direction side of connector holder 140. Specifically, the connector holder 140 is made of resin, the connector 121 is insert-molded in the connector holder 140, and the radially outer end of the connector holder 140 is located radially outward of the radially outer end of the connector 121 of the connector 120, but the present invention is not limited thereto as long as the radially outer end of the connector 121 does not protrude radially outward relative to the radially outer end of the connector 120. The connector holder 140 includes an inner annular portion 141, an outer annular portion 142, a connecting portion 143, and a block portion 144, in which the inner annular portion 141 constitutes a bearing holding portion (a first bearing holding portion in the present invention) that holds the first bearing 1141, the outer annular portion 142 is located on the outer peripheral side of the inner annular portion 141, the connecting portion 143 connects the inner annular portion 141 and the outer annular portion 142, and a plurality of the connecting portions are provided at intervals in the circumferential direction around the central axis L, and the block portion 144 protrudes from the outer annular portion 142 toward the outer peripheral side (protrudes toward the X1 direction in the illustrated example), and covers at least a part of the connector 121. The block 144 has a protrusion 1441 (a lower protrusion in the present invention) extending in the Z2 direction, the protrusion 1441 abuts against the cover 132 from the Z1 direction of the cover 132, the block 144 has a protrusion 1442 (an upper protrusion in the present invention) extending in the Z1 direction, and the protrusion 1442 abuts against the circuit board 113 from the Z2 direction of the circuit board 113. As shown in fig. 4 to 6, each of the plurality of connection portions 143 is provided with a circuit board support portion 1431 extending in the Z1 direction and supporting the circuit board 113 from below the circuit board 113, a rib portion 1432 connecting the connection portion 143 and the inner annular portion 141 is provided on the Z2 direction side of the connection portion 143, and the coil connection portion 12111 is positioned between the plurality of connection portions 143 and between the inner annular portion 141 and the outer annular portion 142. An elastic member 116 is provided between the bearing holding portion 141 and the outer ring of the first bearing 1141, the first bearing 1141 biases the connector holder 140 toward the Z2 direction side (i.e., downward in the drawing) via the elastic member 116, and the housing 130 abuts against the connector holder 140 from the Z2 direction side of the connector holder 140, thereby supporting the connector holder 140. More specifically, the case main body 131 of the housing 130 houses the stator 111, the rotor 112, the inner annular portion 141, and the outer annular portion 142, and the case main body 131 abuts against the outer annular portion 142 from the Z2 direction side of the outer annular portion 142.

(main effect of the present embodiment)

According to the motor 100 of the present invention, since the connector holder 140 has the first bearing holding portion (i.e., the inner annular portion 141) for holding the first bearing 1141, and the elastic member 16 is provided between the first bearing holding portion and the outer ring of the first bearing 1141 in the axial direction which is the extending direction of the central axis L, the first bearing 1141 urges the connector holder 140 in the Z2 direction via the elastic member 116, and the housing 130 supports the connector holder 140 from the Z2 direction of the connector holder 140, compared with the case where the connector holder is fixed to the housing by a screw member such as a screw, the space occupied by providing the screw seat surface on the connector holder and the housing can be saved, the size can be reduced, and the prepressing by the elastic member 116 easily fixes the connector holder 140 in the housing 130 efficiently and stably, and compared with the case where a member for holding the bearing 114 is separately provided, the number of parts can be reduced and this also contributes to an improvement in manufacturing efficiency. And in the working process of the motor, the axial movement of the motor can be effectively absorbed, so that the running state of the motor is more stable.

The present invention has been described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.

For example, in the above-described embodiment, the housing 130 supports the connector holder 140 from the Z2 direction side of the connector holder 140, but the present invention is not limited to this, and the housing 130 and the stator 111 may be provided together to support the connector holder 140 from the Z2 direction side of the connector holder 140, or the stator 111 may be provided alone to support the connector holder 140 from the Z2 direction side of the connector holder 140.

In the above embodiment, the elastic member 116 is a wave washer, but the present invention is not limited to this, and for example, the elastic member may be formed of a plate spring or another member.

In the above embodiment, the extending direction of the central axis L corresponds to the actual vertical direction, but the present invention is not limited to this, and the motor 100 may be provided so that the extending direction of the central axis L coincides with the actual horizontal direction, for example, in some cases.

It should be understood that the present invention can freely combine the respective components of the embodiments or appropriately change or omit the respective components of the embodiments within the scope thereof.

Claims (9)

1. A motor comprising a motor main body having a stator and a rotor supported by a bearing so as to be rotatable with respect to the stator about a central axis extending in an up-down direction, a connector portion having a connector electrically connected to the stator and to which an external device is connected, and a connector holder covering at least a part of the connector, and a housing that houses the motor main body and the connector portion,

the bearing includes a first bearing as a rolling bearing,

the connector holder has a first bearing holding portion that holds the first bearing,

an elastic member is provided between the first bearing holding portion and an outer ring of the first bearing in an axial direction which is an extending direction of the central axis,

the first bearing applies a force downward to the connector holder via the elastic member,

the housing and/or the stator support the connector holder from below the connector holder.

2. The motor of claim 1,

the resilient member is a wave washer.

3. The motor of claim 1,

a circuit board is received in the housing,

the circuit board performs drive control on the motor,

the connector holder supports the circuit board from below the circuit board.

4. The motor of claim 3,

a sensor rotor is mounted on the rotor,

the sensor rotor is spaced apart from and opposes the circuit board above the circuit board.

5. The motor of claim 1,

the connector holder includes:

an inner annular portion constituting the first bearing holding portion;

an outer annular portion located on an outer peripheral side of the inner annular portion and connected to the inner annular portion via a connecting portion; and

a block portion protruding from the outer annular portion toward an outer peripheral side and covering at least a part of the connector,

the housing has:

a case main body that houses the stator, the rotor, the inner annular portion, and the outer annular portion, the case main body abutting below the outer annular portion; and

a cover that protrudes from the case main body toward an outer peripheral side and that houses at least a part of the block portion.

6. The motor of claim 5,

the block portion has a lower protruding portion extending downward,

the lower protruding portion abuts on the upper side of the cover.

7. The motor of claim 5,

a circuit board is received in the housing,

the circuit board performs drive control on the motor,

the block portion has an upper protruding portion extending upward,

the upper protruding part abuts against the lower part of the circuit board.

8. The motor of claim 1,

the bearing includes a second bearing as a rolling bearing located lower than the first bearing,

the housing has a second bearing holding portion that holds the second bearing,

the second bearing holding portion has an inner peripheral surface abutting against an outer periphery of the outer ring of the second bearing and a bearing surface abutting against a lower portion of the outer ring of the second bearing,

an annular groove is provided in an inner peripheral surface of the second bearing holding portion above the second bearing, and an annular member is mounted in the annular groove and abuts against an upper side of an outer ring of the second bearing.

9. The motor of claim 8,

the housing has:

a case main body that houses the motor main body; and

a cover projecting from the housing main body toward an outer peripheral side and housing the connector,

the case main body includes:

the second bearing retainer;

a bottom portion that expands from an outer peripheral edge of the second bearing retainer toward an outer peripheral side; and

a main body part having a cylindrical shape and extending upward from an outer peripheral edge of the bottom part,

the annular groove is provided at a position on the upper surface side of the bottom portion in the axial direction.

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