CN114552894A

CN114552894A - Driving device and electric product

Info

Publication number: CN114552894A
Application number: CN202011307654.0A
Authority: CN
Inventors: 宋巍巍; 吴景龙; 张伟
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2022-05-27

Abstract

The embodiment of the application provides a driving device and an electric product. The drive device includes a motor including a motor main body having a shaft rotatable about a central axis, and a casing accommodating the motor main body and having an opening at least at one side in an axial direction, and a gear box assembly connected to the motor, the gear box assembly including a gear and a gear box accommodating the gear, the gear box assembly further including a bus bar having one end exposed from an end surface of the gear box on a side toward the motor, the bus bar having one end electrically connected to a winding wire in a state where the gear box is mounted to the motor. According to the embodiment of the application, the electric connection between the winding and the bus bar is realized through a simple structure, and the cost is reduced.

Description

Driving device and electric product

Technical Field

The application relates to the field of electromechanics, in particular to a driving device and an electric product.

Background

In a configuration in which the winding wire is electrically connected to the power supply terminal through the electrical connection member, thereby achieving electrical connection with the external power supply, the driving device generally includes a motor and an output member driven by the motor, and the motor side generally has a winding wire and an electrical connection member electrically connected to a lead-out end of the winding wire, and the electrical connection member is also electrically connected to one end of the power supply terminal (e.g., a bus bar) on the output member side, and the other end of the power supply terminal is electrically connected to the external power supply.

It should be noted that the above background description is provided only for the sake of clarity and complete description of the technical solutions of the present application, and for the sake of understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

Disclosure of Invention

The inventor found that, in the above-described conventional structure, a special electrical connection member needs to be provided between the winding and the power supply terminal, and the structure is complicated and the cost is high.

In order to solve at least one of the above problems or other similar problems, embodiments of the present application provide a driving device and an electric product, which can achieve electrical connection between a wire and a bus bar with a simple structure, and reduce cost.

According to a first aspect of embodiments of the present application, there is provided a drive device comprising a motor and a gearbox assembly connected to the motor,

the motor includes:

a motor body having a shaft rotatable about a central axis; and

a casing that accommodates the motor main body and has an opening at least at one axial side,

the gear box assembly comprises gears and a gear box for accommodating the gears,

wherein the gear box assembly further includes a bus bar, one end of which is exposed from an end surface of the gear box facing the motor side, the one end of the bus bar being electrically connected to the winding wire in a state where the gear box is connected to the motor.

In one or more embodiments, the motor further includes a bus bar insertion hole located inside the housing and near one side of the opening in an axial direction, the winding wire being provided in the bus bar insertion hole.

In one or more embodiments, the motor main body further includes an insulator for winding the wire, and the bus bar insertion opening and the insulator are integrally formed.

In one or more embodiments, the gear case and the bus bar are integrally formed.

In one or more embodiments, the one end of the bus bar has a recess extending in an axial direction.

In one or more embodiments, the driving device further includes a flange plate covering the opening of the housing, and a through hole is provided in a position opposite to the bus bar insertion hole.

In one or more embodiments, the edge of the flange plate is provided with a notch,

a recess extending in the axial direction is formed at a position of the gear case opposite to the notch,

the edge of the opening of the casing is provided with a protruding part protruding towards the gear case, and the protruding part is inserted into the notch and the recessed part.

In one or more embodiments, the other end of the bus bar is exposed to a circumferential outer side of the gear case,

the outer peripheral surface of the gear box is provided with a vertical column protruding towards the outside.

In one or more embodiments, the bus bar insertion opening is provided with a groove and a notch recessed from a surface of a side of the bus bar insertion opening facing the gear case,

the groove extends in a first direction at the surface, the notch extends in a second direction at the surface different from the first direction, and the notch extends through the bus bar insertion opening in the second direction, the wire extends in the second direction within the notch.

According to a second aspect of embodiments of the present application, there is provided an electrical product, wherein the electrical product has the driving device as described in the foregoing first aspect.

One of the advantages of the embodiment of the present application is that one end of the bus bar is exposed from the end surface of the gear box facing the motor, and the one end of the bus bar is electrically connected to the winding in a state where the gear box is connected to the motor.

Embodiments of the present application are disclosed in detail with reference to the following description and the accompanying drawings. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising/comprises/having" when used herein, is taken to specify the presence of stated features, integers or components, but does not preclude the presence or addition of one or more other features, integers or components.

Drawings

The above and other objects, features and advantages of the embodiments of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of a drive arrangement according to an embodiment of the first aspect of the present application;

FIG. 2 is another schematic view of a drive arrangement according to an embodiment of the first aspect of the present application;

FIG. 3 is a cross-sectional view of a drive arrangement according to an embodiment of the first aspect of the present application;

FIG. 4 is a schematic view of a bus bar socket of an embodiment of the first aspect of the present application;

FIG. 5 is yet another schematic view of a bus bar socket of an embodiment of the first aspect of the present application;

FIG. 6 is an enlarged partial schematic view of the bus bar socket of FIG. 4;

FIG. 7 is a schematic view of a bus bar according to an embodiment of the first aspect of the present application;

FIG. 8 is a schematic view of a portion of a bus bar according to an embodiment of the first aspect of the present application;

FIG. 9 is a partial schematic view of the gearbox assembly of the embodiment of the first aspect of the present application;

FIG. 10 is a schematic view of a motor according to an embodiment of the first aspect of the present application;

fig. 11 is a partial schematic view of a drive device according to the first aspect of the present application.

Detailed Description

The foregoing and other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the application are disclosed in detail as being indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the described embodiments, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims.

In embodiments of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.

In the embodiments of the present application, the singular forms "a", "an", and the like may include the plural forms and should be interpreted broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "comprising" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.

In the following description of the present application, for the sake of convenience of description, a direction extending along or parallel to the axis of the motor main body is referred to as an "axial direction", a radial direction centering on the axis of the motor main body is referred to as a "radial direction", and a direction surrounding the axis of the motor main body is referred to as a "circumferential direction". It should be noted that these are for convenience of illustration only and do not limit the orientation of the motor during manufacture and use.

Embodiments of the present application will be described below with reference to the drawings.

Embodiments of the first aspect

Embodiments of a first aspect of the present application provide a drive device.

FIG. 1 is a schematic view of a drive arrangement according to an embodiment of the first aspect of the present application; FIG. 2 is another schematic view of the drive arrangement of an embodiment of the first aspect of the present application, illustrating the drive arrangement with the motor and gearbox assembly in an unconnected state; fig. 3 is a cross-sectional view of the drive device of the embodiment of the first aspect of the present application, viewed along a plane passing through the central axis OO' shown in fig. 2.

As shown in fig. 1 to 3, the drive device 10 includes a motor 11 and a gear box assembly 12 connected to the motor 11, the motor 11 includes a motor main body 111 (see fig. 3) and a housing 112, the motor main body 111 has a shaft 1111 that can rotate about a central axis OO ', the housing 112 accommodates the motor main body 111, and the housing 112 has an opening 1121 (see fig. 4) at least at one axial side (O side of the central axis OO'), and the gear box assembly 12 includes a gear 121 (see fig. 3) and a gear box 122 accommodating the gear 121.

In the embodiment of the present application, the driving device 10 may be used in various scenes or devices, for example, may be used for driving the opening and closing of a sunroof, or may be used for driving a wiper member of a car, or may be applied to various speed reduction devices, etc., and the present application is not limited thereto.

In the embodiment of the present application, the motor 11 may be a brushless motor, and the motor body may further have a stator, a rotor, a bearing, and the like, which can be referred to in the related art.

As shown in fig. 2, the gear box assembly 12 further includes a bus bar 123, one end 1231 of the bus bar 123 is exposed from an end surface 1221 of the gear box 122 on the side toward the motor 11, and the one end 1231 of the bus bar 123 is electrically connected to the winding 113 (see fig. 4) in a state where the gear box 122 is connected to the motor 11.

As is apparent from the above embodiment, the one end 1231 of the bus bar 123 is exposed from the end surface 1221 of the gear case 122 on the side facing the motor 11, and the one end 1231 of the bus bar 123 is electrically connected to the winding 113 in a state where the gear case 122 is connected to the motor 11, whereby the bus bar 123 and the winding 113 are directly electrically connected to each other, and the winding 113 and the bus bar 123 can be electrically connected to each other with a simple configuration, and the cost can be reduced.

Fig. 4 is a schematic view of a bus bar socket of an embodiment of the first aspect of the present application.

As shown in fig. 4, in one or more embodiments, the motor 11 may include a bus bar insertion hole 114, the bus bar insertion hole 114 being located inside the housing 112 and on a side (O side of the central axis OO') axially adjacent to the opening 1121, and the winding wire 113 being provided in the bus bar insertion hole 114. Thus, by providing the wire in the bus bar insertion opening, the wire can be reliably supported and accurately positioned, and the reliability of the electrical connection between the one end 1231 of the bus bar 123 and the wire 113 can be improved when the motor and the gear box assembly are assembled.

In the embodiment of the present application, the bus bar insertion opening may be made of any insulating material, such as resin, and the bus bar insertion opening 114 may be integrally formed with other parts of the motor, such as the bus bar insertion opening 114 may be integrally formed with an insulating part or a housing in the motor, and furthermore, the bus bar insertion opening 114 may be separately formed and then installed in the motor, and it is only necessary that the bus bar insertion opening 114 is disposed inside the housing 112 of the motor and at a position axially close to one side (O side of the central axis OO') of the opening 1121, and when the motor and the gear box assembly is assembled, the one end 1231 of the bus bar 123 can be electrically connected to the winding 113 in the bus bar insertion opening 114 when being inserted into the motor 11 in the axial direction.

Fig. 5 is a further schematic view of the bus bar insertion opening of the embodiment of the first aspect of the present application, showing the bus bar insertion opening integrally formed with an insulator around which a motor winding is wound.

As shown in fig. 5, in one or more embodiments, the motor main body 111 may further include an insulator 115 for winding the wire 113, and the bus bar insertion opening 114 and the insulator 115 are integrally formed. Thus, the bus bar insertion opening is formed integrally with the insulator 115, so that the manufacturing process can be simplified and the winding wire can be supported by the bus bar insertion opening.

For example, in the present embodiment, the insulator 115 may be an insulating member of a stator, the stator may further have a stator core 116, the insulator 115 is inserted into the stator core 116 in the axial direction and the winding 113 is wound on the insulator 115 to form a stator winding, and the bus bar insertion opening 114 may be exposed from an end surface of a side of the stator core 116 facing the gear case.

Fig. 6 is an enlarged partial schematic view of the bus bar socket shown in fig. 4. As shown in fig. 6, in one or more embodiments, the bus bar insertion opening 114 is provided with a groove 1141 and a notch 1142, the groove 1141 and the notch 1142 are recessed from a surface 1143 of the bus bar insertion opening 114 toward a side of the gear case 122, the groove 1141 extends in a first direction P1 at the surface 1143, the notch 1142 extends in a second direction P2 different from the first direction P1 at the surface 1143, and the notch 1142 penetrates the bus bar insertion opening 114 in the second direction P2, and the winding wire 113 extends in the second direction P2 within the notch 1142. Thus, the winding wire 113 can be placed in the bus bar insertion hole 114 through the notch 1142, and the motor-side winding wire 113 can be fixed, and the bus bar can be brought into contact with and electrically connected to the winding wire when the bus bar is inserted into the slot 1141.

In the embodiment of the present application, the axial depth of the groove 1141 may be greater than the axial depth of the notch 1142, so that, in the case of disposing the winding wire 113 in the notch 1142, it is possible to ensure that the bus bar 123 can reliably contact and electrically connect with the winding wire in the case of inserting the bus bar into the groove 1141, but is not limited thereto, and the axial depth of the groove 1141 and the axial depth of the notch 1142 may also be in other relationships.

In the embodiment of the present application, the first direction P1 and the second direction P2 may be perpendicular or substantially perpendicular to each other, but are not limited thereto, and they may have other relationships.

In the embodiment, the bus bar insertion opening 114 may have a substantially rectangular shape when viewed from the axial direction, and the length of the side parallel to the first direction P1 may be greater than the length of the side parallel to the second direction P2, so that the groove 1141 may have a larger size in the first direction P1, thereby ensuring the size of the bus bar inserted into the notch 1142 in the first direction P1, and facilitating the insulation layer of the wire to be damaged by the bus bar inserted into the notch 1142. The present application is not limited thereto and the bus bar insertion opening 114 may have other shapes.

In the embodiment of the present application, the shape of the groove 1141 and the notch 1142 of the bus bar insertion opening 114 on the surface 1143 of the bus bar insertion opening 114 may be any shape, for example, a rectangle as shown in fig. 6, but is not limited thereto, and may also be other shapes, for example, the groove 1141 may be a circle, etc.

In one or more embodiments, as shown in fig. 6, the number of the bus bar insertion holes 114 may be 3, but is not limited thereto, and the number of the bus bar insertion holes 114 may also be other values, and a plurality of bus bar insertion holes 114 may be arranged at equal intervals or at unequal intervals in the circumferential direction, and the number of the bus bar insertion holes 114 may be equal to the number of the bus bars 123.

In one or more embodiments, the gear case 122 may be integrally formed with the bus bar 123, thereby saving an assembly process between the bus bar 123 and the gear case 122, improving the positioning accuracy of the bus bar 123 when the gear case assembly 12 and the motor 11 are assembled, and ensuring reliable electrical connection of the bus bar 123 and the winding wire 13. However, the present invention is not limited to this, and the gear case 122 and the bus bar 123 may be assembled after being separately molded.

In the embodiment of the present application, the gear case 122 may be made of a resin material, and the bus bar 123 may be made of various conductive materials, and in the case where the gear case 122 and the bus bar 123 are integrally molded, the bus bar 123 may be first molded, and then the bus bar 123 may be positioned using a mold, and then the gear case 122 may be molded by injecting a resin into the mold so that the gear case 122 and the bus bar 123 are integrally molded.

Fig. 7 is a schematic view of a bus bar of the embodiment of the first aspect of the present application, and fig. 8 is a partial schematic view of the bus bar of the embodiment of the first aspect of the present application.

As shown in fig. 7 and 8, in one or more embodiments, one end 1231 of the bus bar 123 has an axially extending recess 1232. Accordingly, in the case where the bus bar 123 is inserted into the motor 11, the electrical connection between the bus bar 123 and the wire 113 can be achieved by the concave portion 1232 of the bus bar 123 breaking the insulating layer of the wire 113, and further, in the case where the wire 113 is provided in the bus bar insertion opening 114, the accurate positioning and the reliable holding of the wire 113 can be achieved by the bus bar insertion opening 114, and in the working process of inserting the bus bar 123 into the motor 11, the concave portion 1232 of the bus bar 123 and the wire 113 can be surely aligned, which is advantageous for achieving the electrical connection reliably.

In the present embodiment, as shown in fig. 7 and 8, the recess 1232 of the one end 1231 of the bus bar 123 is in a shape in which the opening dimension D is large and the inside dimension D is small, and the opening dimension D may be larger than the diameter of the winding 113 (including the insulating layer and the core wire) and the inside dimension D may be smaller than the diameter of the winding 113, whereby, when the bus bar 123 is inserted into the motor 11 in assembling the motor and the gear box assembly, the prongs on both sides of the recess 1232 can reliably break the insulating layer of the winding in accordance with the insertion action, and a special work of removing the insulating layer of the winding is not required.

In one or more embodiments, as shown in fig. 7, one end 1231 of the bus bar 123 has a flat plate portion 1233, and the bus bar 123 is further provided with a circular through hole 1235, and the application is not limited to the position where the circular through hole 1235 is provided on the bus bar 123, and for example, the circular through hole 1235 may be provided on the other end of the bus bar 123, and other positions may also be provided. Thus, in the case where the bus bar is positioned by the mold and the gear case is molded by injecting resin into the mold so that the gear case and the bus bar terminal are integrally molded, the flat plate portion 1233 of the bus bar 123 is held by the jig so as to position the bus bar in the axial direction, and the positioning pin is inserted into the circular through hole 1235 of the bus bar 123 so as to position the bus bar 123 in the radial direction, thereby facilitating the resin injection molding.

In the embodiment of the present invention, as shown in fig. 7 and 8, the concave portion 1232 penetrates the bus bar 123 in the thickness direction of the flat plate portion 1233 at the one end 1231 of the bus bar 123 to form two opposite fork portions on both sides of the concave portion 1232, and the opposite surfaces of the two fork portions may form a corner protruding toward the inside of the concave portion, thereby contributing to breaking the insulating layer of the winding 113.

In the embodiment of the present application, as shown in fig. 7 and 8, the number of the bus bars 123 may be 3, but is not limited thereto, and the number of the bus bars may be set according to actual needs.

Fig. 9 is a partial schematic view of the gear box assembly of the embodiment of the first aspect of the present application, showing the other end 1234 of the bus bar 123 exposed from the gear box 122.

As shown in fig. 9, in one or more embodiments, the other end 1234 of the bus bar 123 is exposed to the circumferential outer side of the gear case 122, and thus, the other end 1234 of the bus bar 123 and the external member may be electrically connected by covering the external member, such as a control circuit board, to the gear case, thereby electrically connecting the bus bar 123 and the external member.

In one or more embodiments, as illustrated in FIG. 9, the outer peripheral surface of the gear case 122 is provided with a post 1224 that protrudes toward the outside. Thus, when the other end 1234 of the bus bar 123 is connected to the exterior member, the exterior member can be reliably fixed by inserting the post 1224 into the exterior member. In the present embodiment, the column 1224 and the other end 1234 of the bus bar 123 may be disposed on the same side of the outer circumferential surface of the gear case 122.

Fig. 10 is a schematic view of a motor according to an embodiment of the first aspect of the present application, showing a case where an opening of the motor is provided with a flange.

In one or more embodiments, as shown in fig. 10, the driving device 10 may further include a flange 13, the flange 13 covers the opening 1121 of the housing 112, and a through hole 131 is formed at a position of the flange 13 opposite to the bus bar insertion opening 114. Thus, the bus bar 123 can be inserted into the bus bar insertion opening 114 through the flange 13, and the bus bar 123 can be more reliably inserted into the bus bar insertion opening and electrically connected to the wire.

Fig. 11 is a partial schematic view of the drive unit of the first aspect of the present application, showing a portion of the gearbox, flange and motor in an assembled state.

As shown in fig. 10 and 11, in one or more embodiments, the edge of the flange 13 is provided with a notch 132, a recess 1222 extending in the axial direction is formed in the gear case 122 at a position opposite to the notch 132 (as shown in fig. 2), a protrusion 1123 protruding toward the gear case 122 is provided on the edge 1122 of the opening 1121 of the housing 112, and the protrusion 1123 is inserted into the notch 132 and the recess 1222. Thus, by the engagement of the protrusion 1123 with the notch 132 and the recess 1222, circumferential positioning between the housing 112, the flange 13 and the gear case 122 is achieved.

In the embodiment of the present application, as shown in fig. 10 and 11, the outer peripheral surface of the partial edge 1122 of the opening 1121 of the housing 112 may be a flat surface S, and thus, when assembling the motor and the gear case, the motor may be clamped and circumferentially positioned by the flat surface S, and the assembly of the motor and the gear case may be easily performed. The plane S may be formed at a plurality of positions in the circumferential direction of the casing 112, for example, at circumferentially opposite positions of the casing.

In the present embodiment, the protrusion 1123 may be formed to protrude from the edge 1122 of the outer circumferential surface of the housing 112, which is the plane S, toward the gear case 122, thereby facilitating assembly of the motor and the gear case.

According to the above-described embodiment of the present application, the one end 1231 of the bus bar 123 is exposed from the end surface 1221 of the gear case 122 on the side facing the motor 11, and the one end 1231 of the bus bar 123 is electrically connected to the wire 113 in a state where the gear case 122 is attached to the motor 11, whereby the bus bar 123 and the wire 113 are directly electrically connected, and the wire 113 and the bus bar 123 can be electrically connected to each other with a simple structure, and the cost can be reduced.

Embodiments of the second aspect

Embodiments of the second aspect of the present application provide an electrical product having the driving device 10 described in embodiments of the first aspect. Since the structure of the driving device 10 has been described in detail in the embodiment of the first aspect, the contents thereof are incorporated herein, and the description thereof is omitted here.

In the embodiment of the present application, the electric product may be any device or equipment using the driving device 10, including various household appliances, office automation equipment, industrial equipment, or components in various equipment, such as various speed reduction devices including the driving device 10, a device for driving a sunroof to open and close including the driving device 10, a device for controlling a wiper operation of an automobile including the driving device 10, and the like.

According to the embodiment of the present invention, in the electric product including the driving device 10, the one end 1231 of the bus bar 123 is exposed from the end surface 1221 of the gear case 122 on the side facing the motor 11, and the one end 1231 of the bus bar 123 is electrically connected to the winding 113 in a state where the gear case 122 is attached to the motor 11, whereby the bus bar 123 and the winding 113 are directly electrically connected, and the winding 113 and the bus bar 123 can be electrically connected to each other with a simple configuration, and the cost can be reduced.

It is to be noted that the above merely illustrates the embodiments of the present application, but the embodiments of the present application are not limited thereto, and may be modified as appropriate based on the above embodiments. In addition, the above is only an exemplary description of each component, but the embodiments of the present application are not limited thereto, and specific contents of each component may also refer to the related art, and further, components not shown in the drawings may be added, or one or more components in the drawings may be reduced.

The embodiments of the present application have been described in conjunction with specific embodiments, but it should be clear to those skilled in the art that these descriptions are only illustrative and not intended to limit the scope of the embodiments of the present application. Various modifications and adaptations to the embodiments of the present application may occur to those skilled in the art based upon the spirit and principles of the embodiments of the present application and are within the scope of the embodiments of the present application.

Preferred embodiments of the present application are described above with reference to the accompanying drawings. The many features and advantages of the embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of the embodiments that fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the present application to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.

Claims

1. A drive arrangement including a motor and a gearbox assembly connected to the motor,

the motor includes:

a motor body having a shaft rotatable about a central axis; and

it is characterized in that the preparation method is characterized in that,

the gear box assembly further includes a bus bar having one end exposed from an end surface of the gear box on a side facing the motor, the one end of the bus bar being electrically connected to the winding wire in a state where the gear box is connected to the motor.

2. The drive device according to claim 1,

the motor further comprises a bus bar socket, the bus bar socket is located on the inner side of the shell and is close to one side of the opening in the axial direction, and the winding wire is arranged in the bus bar socket.

3. The drive device according to claim 2,

the motor main body further includes an insulator for winding the wire, and the bus bar insertion hole and the insulator are integrally formed.

4. The drive device according to claim 1,

the gear case and the bus bar are integrally formed.

5. The drive of claim 1,

the one end of the bus bar has a recess extending in an axial direction.

6. The drive device according to claim 2,

the driving device further includes a flange plate covering the opening of the housing, and a through hole is provided at a position of the flange plate opposed to the bus bar insertion opening.

7. The drive of claim 6,

the edge of the flange plate is provided with a notch,

8. The drive of claim 1,

the other end of the bus bar is exposed outside the circumferential direction of the gear box,

9. The drive device according to claim 2 or 3,

the bus bar insertion opening is provided with a groove and a notch recessed from a surface of a side of the bus bar insertion opening facing the gear case,

the groove extends in a first direction at the surface, the notch extends in a second direction at the surface different from the first direction, and the notch extends through the bus bar receptacle in the second direction, the wire winding extends in the second direction within the notch.

10. An electrical product, characterized in that the electrical product is provided with a drive device according to any one of claims 1-9.