CN211377785U

CN211377785U - Electric connecting device, motor cover and motor

Info

Publication number: CN211377785U
Application number: CN201922089796.3U
Authority: CN
Inventors: 赵辉; 杨元浩; 王偲绮; 吴倩; 姚思佳
Original assignee: Bosch Automotive Products Changsha Co Ltd
Current assignee: Bosch Automotive Products Changsha Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-08-28
Anticipated expiration: 2029-11-28

Abstract

The utility model provides an electric connecting device, motor cover and motor. Wherein the electrical connection device is used for passing through the perforation of the wall so as to electrically connect the terminals at both ends of the wall, and comprises: a member body including opposing first and second sides; and a plurality of electrical connectors each having a middle portion embedded in the member body, each of the electrical connectors including a first electrical connection end at a first side of the member body and a second electrical connection end at a second side of the member body, the first and second electrical connection ends being electrically communicated with each other, the first electrical connection end being located at an inner side of the wall for electrical connection with a terminal at the inner side of the wall, and the second electrical connection end being located at an outer side of the wall for electrical connection with a terminal at the outer side of the wall when the member body is mounted to the wall.

Description

Electric connecting device, motor cover and motor

Technical Field

The utility model relates to an electric connecting device field, more specifically, the utility model relates to an electric connecting device and have this type of electric connecting device's motor for the motor.

Background

Some existing electrical devices, such as motors, include a housing through which wires need to be run to connect internal wiring to external cables. There is a need to effectively secure the cable to the housing as it passes through the housing. One arrangement is to thread and secure the cable to the housing by providing a threaded hole in the housing and threading an externally threaded sleeve on the cable into the threaded hole of the housing by passing the cable through the threaded hole. The cables are connected to the electrical connection terminals in the housing by soldering after entering the housing.

Disclosure of Invention

It is an object of the present invention to solve or at least alleviate problems in the prior art.

According to an aspect, there is provided an electrical connection device for passing through a perforation of a wall to electrically connect terminals on both sides of the wall, the electrical connection device comprising:

a member body, opposing first and second sides of the member body; and

a plurality of electrical connectors, each of which has a middle portion embedded in the member body, each of the electrical connectors including a first electrical connection end at a first side of the member body and a second electrical connection end at a second side of the member body, the first and second electrical connection ends being electrically communicated with each other, the first electrical connection end being located at an inner side of the wall for electrical connection with a terminal at the inner side of the wall, and the second electrical connection end being located at an outer side of the wall for electrical connection with a terminal at the outer side of the wall when the member body is mounted to the wall.

In another aspect, a motor cover is provided, which includes:

a wall having a plurality of perforations; and

an electrical connection device according to various embodiments mounted to the wall.

In another aspect, there is provided an electric motor including a motor cover and a motor main body according to the embodiment, wherein the first electrical connection ends of the plurality of electrical connectors of the electrical connection device mounted to the motor cover are electrically connected to a winding wire of the motor main body.

Drawings

Embodiments of the present invention are described in more detail in the following description in conjunction with the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention.

Figure 1 shows a view of an electrical connection device according to the invention when assembled; and

fig. 2 shows an exploded view of an electrical connection device according to the present invention.

Detailed Description

An embodiment according to the invention is described with reference to fig. 1 and 2. In an embodiment of the invention, the electrical connection device according to the invention is described in connection with a cover of a three-phase motor, in an alternative embodiment, the electrical connection device according to an embodiment of the invention may be applied to any other suitable electrical device, including but not limited to a motor or an electric tool.

The motor cover 1 shown in fig. 1 is in use combined with a motor housing. A number of mounting holes 13 are provided around the motor cover 1 for connection of the motor cover 1 to the motor body. The motor body can accommodate components such as a rotor, a stator and a winding. The winding is electrically connected with the terminal assembly 2, while the

connection terminals

21,22,23 of the terminal assembly 2 extend to be electrically connected with an external cable by means of the electrical connection device 3 according to the invention. More specifically, the cover 1 comprises at least one wall with through holes, for example, the cover 1 comprises a bottom wall 12 and a side wall 14 around the bottom wall 12, while the wall with through holes may be the side wall 14 of the cover 1. In some embodiments, the wall 14 may be oriented, for example, in a direction parallel to the output shaft of the motor. The wall 14 includes a plurality of through-holes 151,152,153, such as two or three or more, which may be arranged side by side or in another suitable manner. This side wall 14 of the cover 1 can be perpendicular to its bottom wall 12, the bottom wall 12 comprising a hole 11 allowing the motor shaft to pass through to output torque. Furthermore, the bottom wall 12 may have an opening 17 such that the first electrical connection ends 332 of the plurality of electrical connectors 301,302,303 are accessible from outside the cover 1, thereby facilitating the connection of the first electrical connection ends 332 of the plurality of electrical connectors 301,302,303 with the

connection terminals

21,22,23 of the terminal assembly 2. An electrical connection device 3 according to an embodiment of the invention may be mounted to this wall 14. Alternatively, the electrical connection device 3 may be mounted to any wall of any electrical device.

With continued reference to fig. 2, in some embodiments, the electrical connection apparatus 3 comprises: a member body 31, the member body 31 may have opposing first and second sides, such as a first side facing the wall 14 and a second side facing away from the wall 14 when installed. Electrical connection apparatus 3 further includes a plurality of electrical connectors 301,302,303, electrical connectors 301,302,303 having a first electrical connection end 332 located on a first side of member body 301 and a second electrical connection end 331 located on a second side of member body 301. The first electrical connection terminal 332 and the second electrical connection terminal 331 are electrically connected, and the middle portion between the first electrical connection terminal 332 and the second electrical connection terminal 331 is embedded in the member main body 31. As shown in fig. 1, when the component body is mounted to a wall, the first electrical connection end 332 is located inside the wall 14 for electrical connection with the

connection terminals

21,22,23 of the terminal assembly 2 inside the wall, while the second electrical connection end is located outside the wall 14 for electrical connection with the terminals outside said wall (such as the terminals 411,421,431 of the cable). Also shown are terminals 24 of terminal assembly 2 for connection with the motor windings.

In some embodiments, member body 31 may be formed directly from an insulative material, such as plastic, and electrical connectors 301,302,303 may be embedded directly into member body 31 during the molding process of member body 31. In other embodiments, the electrical connection device may further include an insulator 32 surrounding the electrical connector. Insulator 32 separates electrical connectors 301,302,303 from member body 31, such that member body 31 is insulated from electrical connectors 301,302,303 even when member body 31 is made of a metallic material. In some embodiments, member body 31 may be formed from a metallic material and include a plurality of through-holes, insulator 32 may be formed from a plastic material, and insulator 32 may be injection molded between the plurality of through-holes of member body 31 and electrical connectors 301,302,303 and thereby couple member body 31 and electrical connectors 301,302,303 together. The member body 31, which is made of a metallic material, may have better strength, such as a stronger and more durable connection with the wall 14. In some embodiments, the component body 31 is sheet-like and the insulator 32 is sleeve-like and surrounds the middle between the first electrical connection end 332 and the second electrical connection end 331 of the electrical connectors 301,302, 303.

In some embodiments, the electrical connection means further comprise a seal arranged on the first side of the component body 31, the electrical connection means being securable to the wall from the outside thereof when the electrical connection means is mounted thereto, and the first electrical connection end 332 of each electrical connector passing through the aperture 151,152,153 of said wall 14 to project into the inside of said wall 14, the seal then being sandwiched between the outside face of the wall and the first side of the component body 31, such that a greater clamping force is provided to ensure good sealing of the seal. In an alternative embodiment, the electrical connection means may also be fixed to the wall from the inside of the wall, in which case a seal is provided between the second side of the component body 31 and the inside face of the wall. In some embodiments, the seal may be a gasket 34, and the gasket 34 includes an opening 341,342,343 corresponding to the location of the electrical connector of the component body 31 to allow the electrical connector to pass through. The gasket 34 may be adhered to the member body 31 with the gasket 34 between the member body 31 and the wall 14 when the member body 31 is engaged with the wall 14. In an alternative embodiment, the seal may be affixed to the wall 14. In alternative embodiments, the seal may be a gasket or other suitable type of seal.

In some embodiments, the first electrical connection end 332 and/or the second electrical connection end 331 of the electrical connectors 301,302,303 include mounting holes for connection with terminals, e.g., the terminals 411,421,431 of a cable are connected to the second electrical connection end 331 of the electrical connectors by a first set of bolts 72 in the mounting holes, which may be self-threaded to receive the first set of bolts 72 or secure the first set of bolts 72 by additional nuts. In some embodiments, the first set of bolts 72 may be tightened with a predetermined torque by an automated tightening mechanism, such as a bolt gun, to ensure consistency and stability of the connection and to improve process controllability of assembly. Similarly, the

connection terminals

21,22,23 of the terminal assembly 2 connected to the motor winding may be connected to the mounting holes of the first electrical connection terminal 332 of the electrical connector through the through holes 211,212,213 thereof by the second set of bolts 71. The first electrical connection end 332 of the electrical connector may or may not be threaded and the second set of bolts 71 may also be tightened with a predetermined torque by a bolt gun. In an embodiment, the cover comprises an opening 17 in its bottom wall 12 to allow the first set of bolts 71 to be tightened from outside the cover, facilitating the assembly of the

connection terminals

21,22,23 with the first electrical connection end 332 of the electrical connector. In alternative embodiments, the first and/or second electrical connection ends of the electrical connector may be connected to the cable and terminal assembly 2 by other means, such as welding, etc.

In some embodiments, the member body 31 includes a plurality of mounting holes 314 disposed about the plurality of through holes for securing the electrical connection device to the wall 14 by the third set of bolts 61, 62. Correspondingly, the gasket 34 may also have an aperture 344 corresponding to the location of the mounting hole 314 to allow the third set of bolts 61,62 to pass through, while the wall 14 may have an aperture 161 corresponding to the location to receive the third set of bolts 61, 62. In the embodiment shown, the component body is a rectangular sheet comprising three through holes (two or more may also be provided side by side) arranged side by side, each through hole being surrounded by four mounting holes for fixing the electrical connection means to the wall by means of a third set of bolts 61,62, an insulator and an electrical connection being arranged in each through hole. In some embodiments, adjacent through holes may share two mounting holes therebetween. Through the mounting holes surrounding the through holes, when the fixing device is fixed, the stress on the periphery of the through holes is uniform, and therefore the consistency of the seal on the periphery is guaranteed.

On the other hand, a motor is provided, the motor including a motor main body and a cover, wherein the cover includes a wall having a perforation, the motor further including an electrical connection device according to an embodiment of the present invention for connecting an electrical connection terminal inside the wall with an electrical connection terminal outside the wall.

Compared to the conventional arrangement where the cable is bolted to the housing and welded to the wire wrap joint, according to the present invention, the advantages that the electrical connection device and the motor of some embodiments may have include: 1. the vibration of the cable is absorbed by the housing and is not transmitted to the electric connection part basically; 2. better sealing performance, and liquid is prevented from entering the shell; 3. bolting by applying a predetermined torque has better consistency than welding and facilitates process flow control and the like.

All the details of the embodiments above are provided for the purpose of better understanding the subject matter of the present invention, and therefore the above description is exemplary rather than limiting.

Claims

1. An electrical connection device for passing through a perforation (151,152,153) of a wall (14) to electrically connect terminals on both sides of the wall (14), characterized in that the electrical connection device comprises:

a member body (31), the member body (31) including opposing first and second sides; and

a plurality of electrical connectors (301,302,303), a central portion of each of said electrical connectors (301,302,303) being embedded in said member body, each of said electrical connectors comprising a first electrical connection end (332) at a first side of said member body and a second electrical connection end (331) at a second side of said member body, said first electrical connection end (332) and said second electrical connection end (331) being in electrical communication, said first electrical connection end (332) being located inside said wall (14) for electrical connection with terminals (21,22,23) inside said wall (14) and said second electrical connection end (331) being located outside said wall (14) for electrical connection with terminals (411,421,431) outside said wall (14) when said member body (31) is mounted to said wall (14).

2. The electrical connection device according to claim 1, further comprising an insulator (32) surrounding the electrical connector.

3. The electrical connection device according to claim 2, characterized in that the component body (31) is made of a metal material and comprises a plurality of through holes, the insulator (32) is made of a plastic material, the insulator (32) is injection-molded between the plurality of through holes of the component body (31) and the electrical connectors (301,302,303) and thereby connects the component body (31) and the electrical connectors (301,302,303) together, the component body (31) is in the form of a sheet and the insulator (32) is in the form of a sleeve.

4. The electrical connection device according to claim 1, characterized in that it further comprises a seal provided on the first side of the member body (31), the electrical connection device being fixed to the wall from the outside thereof, and in that the first electrical connection end (332) of each electrical connection passes through a perforation (151,152,153) of the wall (14) to protrude into the inside of the wall (14), the seal being sandwiched between the outer side of the wall (14) and the first side of the member body (31).

5. The electrical connection device according to claim 4, wherein the seal is a gasket (34), the gasket (34) including an opening (341,342,343) corresponding to each of the electrical connector locations of the component body.

6. The electrical connection device according to claim 1, characterized in that the first electrical connection end (332) and/or the second electrical connection end (331) of each electrical connector comprise mounting holes for connection with terminals.

7. The electrical connection device according to claim 1, characterized in that the member body (31) comprises a plurality of mounting holes (314) distributed around each electrical connector (301,302,303) for fixing the electrical connection device to the wall.

8. A motor cover, comprising:

a wall (14) having a plurality of perforations (151,152, 153); and

an electrical connection device as claimed in any one of claims 1 to 7 mounted to the wall.

9. The motor cover according to claim 8, characterized in that it comprises a bottom wall (12) and a wall (14) surrounding said bottom wall, said plurality of perforations being formed on said wall (14), the bottom wall (12) of the cover being formed with a hole (11) allowing the shaft of the motor to pass through for outputting the torque and an opening (17) allowing access to said first electrical connection end (332) of said plurality of electrical connections (301,302,303) from outside the cover.

10. An electric machine, characterized in that it comprises a machine cover according to claim 8 or 9 and a machine body, wherein the first electrical connection ends (332) of the plurality of electrical connections (301,302,303) of the electrical connection means mounted to the machine cover are electrically connected to the windings of the machine body.