CN111193352B

CN111193352B - Connector, motor end cover with connector and motor with end cover

Info

Publication number: CN111193352B
Application number: CN201811363096.2A
Authority: CN
Inventors: 詹大泫; 约翰·劳伦斯·桑蒂连; 王乔才; 林健楼
Original assignee: Johnson Electric Guangdong Co Ltd
Current assignee: Johnson Electric Guangdong Co Ltd
Priority date: 2018-11-14
Filing date: 2018-11-14
Publication date: 2023-08-11
Anticipated expiration: 2038-11-14
Also published as: WO2020098552A1; CN111193352A

Abstract

The invention relates to the technical field of motors and provides a connector, which comprises a connector shell and an embedded part, wherein the connector shell comprises a base part and a connector side wall which are integrally formed, the connector side wall extends from the periphery of the base part, an opening is formed in one end, far away from the base part, of the connector side wall, the embedded part is detachably connected with the connector shell, and a groove extending from the opening to the base part is formed in the embedded part. The connector can reduce the processing cost and reduce the risk of acoustic performance difference of the motor.

Description

Connector, motor end cover with connector and motor with end cover

Technical Field

The invention relates to the technical field of motors, in particular to a connector, a motor end cover with the connector and a motor with the end cover.

Background

An electric machine typically includes a stator as a stationary part, a rotor as a rotating part, and an end cap that is commonly used to mount components such as brushes. Some end caps include an end cap body and a female connector; after the end cover is processed, the female connector is matched with a male connector to supply power. In order to avoid incorrect connection of the male connector and the female connector which are not matched, in particular for different types of motors which are mounted in the same position (for example in a vehicle steering column adjusting device), it is necessary to avoid incorrect connection by means of differential connectors. In the existing design, the female connector is generally integrally formed on the motor end cover, so when the connector shape of the connector of the end cover needs to be changed, the whole connector, and even the whole end cover needs to be redesigned, and a production die, a processing tool and the like matched with the connector need to be replaced, thereby greatly increasing the processing cost, prolonging the processing and checking periods, and simultaneously easily causing dimensional deviation, and leading to the risk of difference of acoustic performance of the motor.

Disclosure of Invention

An object of the present invention is to provide a connector capable of solving the above-mentioned problems, a motor end cap having the connector, and a motor having the end cap.

According to an aspect of the present invention, there is provided a connector, including a connector housing and an insert, the connector housing includes a base portion and a connector side wall integrally formed, the connector side wall extends from an outside of the base portion, the connector side wall forms an opening at an end far away from the base portion, the insert is detachably connected with the connector housing, and a groove extending from the opening toward the base portion is provided on the insert.

Preferably, the insert comprises a body portion and a limiting portion, the limiting portion extends outwards from the top end of the body portion and is folded to form the insert, an accommodating gap is formed between the limiting portion and the body portion, and the accommodating gap is used for accommodating the corresponding top end of the side wall of the connector.

Preferably, the top of spacing portion and body portion is the reverse U-shaped jointly, the outside of spacing portion with the outside of corresponding top place connector lateral wall flushes, the top of spacing portion and the other tops except for corresponding top of connector lateral wall are on same horizontal plane.

Preferably, the top ends of the limiting part and the body part are in an inverted U shape, and the corresponding top ends of the side walls of the connectors are provided with accommodating grooves for accommodating the limiting part.

Preferably, the insert further comprises another limiting portion, the other limiting portion extends from the bottom end of the body portion, and a position of the base portion corresponding to the bottom end of the body portion is provided with a fastening hole in fastening fit with the other limiting portion.

Preferably, the other limiting part is an elastic part which is formed by extending from the bottom end of the body part and is approximately L-shaped, a step is formed in the fastening hole, and the elastic part is fastened at the bottom end of the step.

Preferably, the other limiting part is two elastic parts which are formed by extending from the bottom end of the body part and are approximately L-shaped, two steps are formed at the bottom of the buckling hole, and the two elastic parts are respectively hung and buckled at the bottom ends of the corresponding steps.

Preferably, the main body portion is substantially plate-shaped, and both left and right ends of the main body portion are abutted against inner sides of side walls of two adjacent connectors.

Preferably, the groove penetrates the body portion in a thickness direction of the body portion.

Preferably, the connector further comprises a terminal, a communicating notch is arranged on the side wall of the connector on one side of the connector shell, and an insertion groove for inserting the terminal is formed in the base portion.

Preferably, the connector further comprises a terminal arranged on the base portion in an insert molding mode, one end of the terminal is located in the side wall of the connector and extends from the base portion towards the opening, and the other end of the terminal is located outside the side wall of the connector.

According to another aspect of the present invention, there is provided a motor end cover, including an end cover housing and the connector provided in one aspect of the present invention, the end cover housing includes an end cover shell and a mounting portion, the end cover shell is substantially hollow and cylindrical, the mounting portion is vertically disposed in the end cover shell and divides a space in the end cover shell into two cavities, the base portion is connected to an outer side of the end cover shell, and the end cover shell, the mounting portion, the base portion and a connector side wall are integrally formed.

Preferably, the motor end cover further comprises a circuit board, an inductor and a brush, wherein the circuit board is arranged on the mounting part and is positioned in one cavity, and the inductor and the brush are arranged on the mounting part and are positioned in the other cavity.

According to still another aspect of the present invention, there is provided a motor including a stator housing and permanent magnets fixed to an inner wall of the stator housing, and a rotor including a rotating shaft, a core and a commutator fixed to the rotating shaft, and a winding wound around the core, and the motor end cover according to another aspect of the present invention is provided, the motor end cover being connected to one end of the stator housing.

According to the connector provided by the invention, the embedded part is detachably connected with the connector shell, the matching with different male connectors can be realized only through a specific embedded part, the design of the rest parts of the connector is not required to be changed, and the connector has strong universality; compared with the prior art, the end cover comprising the connector can avoid redesigning and processing the whole end cover, effectively reduce the processing cost and shorten the processing period; and meanwhile, dimensional deviation generated in different machining processes is avoided, and the risk of acoustic performance difference of the motor is reduced.

Drawings

Further features of the invention will become more apparent from the following description of preferred embodiments, provided by way of example only in connection with the accompanying drawings, in which:

fig. 1 is a perspective view of a motor according to a first embodiment of the present invention;

FIG. 2 is an exploded schematic view of the motor shown in FIG. 1;

FIG. 3 is a schematic view of the end cap of the motor of FIG. 2;

FIG. 4 is a schematic view of the end cap of FIG. 3 at another angle;

FIG. 5 is a schematic view of the end cap of FIG. 3 with portions of the components removed;

FIG. 6 is a schematic view of the connector housing of the end cap of FIG. 5;

FIG. 7 is a schematic illustration of the insert of the end cap of FIG. 5;

FIG. 8 is a partially exploded view of the end cap shown in FIG. 5;

FIG. 9 is a schematic view of a portion of the end cap of FIG. 7 at another angle;

FIG. 10 is a schematic view of various types of female connectors and mating male connectors;

FIG. 11 is a partial schematic view of an end cap in a second embodiment of the motor of the present invention;

fig. 12 is an exploded view of a connector in a third embodiment of the motor of the present invention;

FIG. 13 is a partial schematic view of an end cap in a fourth embodiment of the motor of the present invention;

FIG. 14 is a schematic view of the insert of the end cap of FIG. 13;

FIG. 15 is a schematic view of the connector housing of the end cap of FIG. 13;

fig. 16 is a schematic view of another angle of the connector housing of fig. 15.

Detailed Description

The present invention will be further described in detail with reference to the drawings and examples, in order to make the objects and advantages of the present invention more apparent. It should be understood that the description of the specific embodiments is intended to be illustrative of the invention and is not intended to be limiting.

As shown in fig. 1 and 2, the motor of the first embodiment of the present invention includes a stator, a rotor, and a motor end cover 3. The stator comprises a stator shell 1 and a permanent magnet 10, wherein the stator shell 1 is approximately hollow cylinder-shaped, one end of the stator shell is open, a positioning notch 12 is arranged at the edge of the open end, and the permanent magnet 10 is fixed on the inner wall of the stator shell 1. The rotor is arranged in the stator and comprises a rotating shaft 2, an iron core 20 and a commutator 21 which are fixed on the rotating shaft 2, and a winding wound on the iron core 20. The iron core 20 comprises a plurality of teeth which are circumferentially distributed by taking the rotating shaft 2 as a center, a wire groove is formed between adjacent teeth, and a winding is wound in the wire groove; the commutator 21 comprises a plurality of commutating segments circumferentially distributed with the rotating shaft 2 as the center. The motor end cover 3 is fixed at the opening of the housing 1. In this embodiment, a top plate 11 is further disposed at an end of the motor end cover 3 away from the housing 1. One end of the motor end cover 3 adjacent to the top plate 11 is provided with a shell positioning protrusion 30, a top plate positioning protrusion 31 and a top plate fixing part 32; the shell positioning bulge 30 faces the stator shell 1 and correspondingly cooperates with the positioning notch 12 on the stator shell 1 so as to circumferentially position the stator; the top plate positioning protrusion 31 faces the top plate 11, and the edge of the top plate 11 is also provided with a notch corresponding to the top plate positioning protrusion 31; the top plate fixing portion 32 extends toward the top plate 11 and has barbs at its ends and is snapped onto the surface of the top plate 11 to fix the top plate 11 and the motor end cover 3 together.

As shown in fig. 3-6, the motor end cap 3 includes an end cap housing 60 and a connector 50. The header 50 includes a header housing, an insert 53, and terminals 84, 85, 86, 87, with the insert 53 being removably connected to the header housing. In this embodiment, the end cap housing 60 and the connector housing are integrally formed by injection molding. In other embodiments, the end cap housing 60 and the connector housing may be formed separately and then assembled and secured.

In this embodiment, the end cap housing 60 includes an integrally formed end cap housing 61 and a mounting portion. The end cover housing 61 is substantially hollow and cylindrical, and the mounting portion is preferably an annular mounting plate 62, and the mounting plate 62 extends from the inner wall of the end cover housing 61 to divide the space in the end cover housing 61 into two cavities. For convenience of explanation, in the present embodiment, the cavity toward the side of the stator housing 1 is referred to as a first cavity, and the cavity toward the side of the top plate 11 is referred to as a second cavity. The mounting plate 62 has a circular through hole 63 in its center for receiving the commutator 21.

In this embodiment, the connector housing includes an integrally formed base portion 51 and a connector side wall 52. The base portion 51 is integrally provided on the outside of the end cover case 61. In this embodiment, the base portion 51 is provided with a plurality of insertion grooves 510 into which the terminals 84, 85, 86, 87 are inserted, respectively. The connector side wall 52 is substantially hollow and columnar, and the connector side wall 52 extends from the outer periphery of the base portion 51, and forms an opening at an end remote from the base portion 51. In this embodiment, the connector side wall 52 of the connector housing facing the end cap housing 61 is provided with a communication notch 100 to facilitate insertion of the insertion terminals 84, 85, 86, 87.

In this embodiment, the motor end cover 3 further includes a first inductor 71, a second inductor 72, a first brush 81, a second brush 82, an overheat protection element 83, and a circuit board 90. Wherein the first inductor 71, the second inductor 72, the overheat protection element 83, the first brush 82 and the second brush 82 are mounted on one plane of the mounting plate 62 and are located in the first cavity. The circuit board 90 is mounted on another plane of the mounting plate 62 and is located within the second cavity. By designing the circuit board 90 and the brushes in different cavities, respectively, dust generated by the brushes during rubbing is prevented from entering the circuit board 90 to cause a short circuit. In this embodiment, one ends of the first terminal 84, the second terminal 85, the third terminal 86, and the fourth terminal 87 are mounted on the base portion 51, enter the first cavity through the communication notch 100, and penetrate through the mounting plate 62 to be connected to the circuit board 90. In this embodiment, the first terminal 84 is serially connected with the first inductor 71 and the first brush 81 in order. The second terminal 85 is serially connected in series with the overheat protection element 83 (thermistor), the second inductor 72, and the second brush 82, wherein the inductor and the brush can be connected through a conductive connection piece 88. Since the overheat protection element 83 and the second inductance 72 are in a series relationship, the connection order of the two may be exchanged in other embodiments.

As shown in fig. 5, two vertical receiving grooves 620 are formed on the mounting plate 62 of the end cover housing 60 for receiving two of the inductors. The vertical axis of the receiving groove 620 is perpendicular to the mounting portion 62 so that the inductor can be vertically mounted on the mounting portion 62. Further, two brush boxes are formed on the mounting plate 62. The first brush 81 and the second brush 82 are slidably received in respective brush boxes, such as brush box 621 of fig. 5, which corresponds to the second brush 82. As shown in fig. 3, the mounting plate 62 has two spring posts formed thereon, each of which is sleeved with a spring. The two springs correspond to the two brushes, respectively, such as spring 89 in fig. 3, which corresponds to the second brush 82. One end of each spring abuts against the mounting plate 62, and the other end abuts against the rear end of the brush (i.e., the side of the brush away from the commutator 21), so that the first brush 81 and the second brush 82 are brought into frictional contact with the commutator 21 by the respective corresponding springs.

The connection head 50 will be described in further detail with reference to fig. 5. In this embodiment, the connector side wall 52 extends from the outer edge of the base portion 51 along the axial direction perpendicular to the base portion 51 and along the end cover housing 61, and the connector side wall 52 and the base portion 51 define a cavity 54. Referring also to fig. 7-9, insert 53 includes a body portion 531. In the present embodiment, the main body 531 is substantially square plate-shaped, and the main body 531 can be inserted along the extending direction of the connector side wall 52 to form a connection with the connector housing. Preferably, the body portion 531 is connected to the inside of the connector side wall 52, and a side of the body portion 531 facing the cavity 54 is parallel to the axis of the connector side wall 52 and is provided with the groove 530. The groove 530 extends from near the bottom end of the body portion 531 to the top end of the body portion 531. In this embodiment, the groove 530 penetrates the body 531 in the thickness direction of the body 531, i.e. a through hole is formed.

Preferably, both the left and right ends of the main body 531 of the insert 53 are abutted against the side walls 52 of the two adjacent connectors, and a first limiting portion is disposed at the bottom end of the main body 531 and is buckled with the base portion 51. The top of the body 531 is provided with a second limiting part, and the second limiting part is buckled and connected with the top of the connector side wall 52. Specifically, as shown in fig. 8, a fastening hole 522 is formed at a position of the base portion 51 adjacent to a side wall and corresponding to the insert 53, the first limiting portion of the insert 53 includes two fasteners 534 extending from the bottom end of the body portion 531, and the fasteners 534 are fastened to the fastening hole 522. In this embodiment, the buckle 534 is L-shaped, two steps 521 are formed at the bottom of the buckle hole, and the buckle 534 is respectively hung and buckled at the bottom ends of the corresponding steps. Preferably, the buckle 534 is an elastic member. It will be appreciated that the clasp 534 may not be entirely L-shaped, for example, angles slightly greater than 90 degrees on either side of the clasp are also possible. As shown in fig. 9, the second stopper portion of the insert 53 is folded outwardly from the top end of the body portion 531. In this embodiment, the second limiting portion and the top end of the body portion 531 are in an inverted U shape, and include a horizontal segment 532 and a vertical segment 533, the horizontal segment 532 extends along a direction perpendicular to the top end of the body portion 531, and the vertical segment 533 extends from the outer end of the horizontal segment 532 along a direction substantially parallel to the body portion 531, so that a receiving gap is formed between the second limiting portion and the body portion. When the insert 53 is inserted into the connector housing, the top end of the corresponding portion of the connector side wall 52 is clamped in the receiving gap, thereby forming a clamping connection. Preferably, the thickness of the top end of the corresponding portion of the connector side wall 52 is reduced relative to the other portions, so that the outer surface of the second stopper portion of the insert 53 is substantially flush with the outer surface of the connector side wall 53 after the insert 53 is inserted. Preferably, the top ends of the corresponding portions of the connector side walls 52 are lower than the remaining top ends of the connector side walls 53 except the corresponding top ends, so that, after the insert 53 is inserted, the top ends of the second limiting portions are on the same level with the remaining top ends of the connector side walls 53 except the corresponding top ends. The fit structure is adopted between the embedded part 53 and the connector housing, so that the structure is simple, and the embedded part 53 can be well prevented from moving up and down and left and right relative to the connector housing.

In the motor end cover 3 of the present invention, the connection head 50 and the terminal are commonly used as female connection heads. When the motor needs to be electrically connected, the male connector with the protrusion matched with the groove 530 is only required to be inserted into the cavity 54 of the female connector; the male connector and the female connector can be connected together quickly, accurately and stably by the cooperation of the protrusions and the grooves 530.

In particular implementations, the grooves 530 on the insert 53 may also be provided at different locations of the insert 53 to distinguish between corresponding end caps for different types of motors; as shown in fig. 10, A-A ', B-B ', C-C ', D-D ', F-F ' mating diagrams (MM illustrating the groove 530, mn illustrating the protrusion) of the male connector and the female connector are shown. Of course, to further enhance the differentiation effect, it is also possible to make the inserts 53 of different colors to correspond to different types of motors. By detachably connecting the insert 53 with the connector housing, matching with different male connectors can be achieved by inserting a specific insert 53 without modifying the design of the rest of the end cap, thereby enhancing the versatility of the end cap without having to redesign and process the entire end cap as in the prior art, while also avoiding dimensional deviations from different processes.

Fig. 11 is a partial schematic view of a motor end cap in a second embodiment of a motor according to the present invention. The same parts as those of the first embodiment will not be described herein. The present embodiment differs from the first embodiment in that: the position of the groove 530 on the insert 53 is different, and the groove 530 of the present embodiment is closer to the center line of the width of the insert 53 than the first embodiment.

Fig. 12 shows an exploded view of a connector in a third embodiment of a motor according to the invention. The same parts as those of the first embodiment will not be described herein. The difference between the connector in this embodiment and the connector 50 in the first embodiment is that: the side of the connector side wall 52 facing the end cover shell 61 is not provided with a communication notch; the connector further comprises a plurality of terminals 511 arranged on the base portion 51 in an insert molding manner, one ends of the terminals 511 are located in the connector side walls 52 and extend from the base portion 51 towards the openings of the connector side walls 52, and the other ends of the terminals 511 are located outside the connector side walls 52.

Fig. 13 is a schematic view of a portion of a motor end cap in a fourth embodiment of a motor according to the present invention. The same parts as those of the first embodiment will not be described herein. Referring to fig. 14 to 16 together, this embodiment differs from the first embodiment in that: the side of the connector side wall 52 facing the end cover shell 61 is not provided with a communication notch; the connector further comprises a plurality of terminals 512 arranged on the base part 51 in an insert molding manner, one ends of the terminals 512 are positioned in the connector side wall 52 and extend from the base part 51 towards the opening of the connector side wall 52, and the other ends of the terminals 512 are positioned outside the connector side wall 52; furthermore, the fitting structure of the insert 53 and the connector housing is also different.

Specifically, the bottom end of the body 531 of the insert 53 extends only in the middle portion thereof to form an elastic member 535, the elastic member 535 is substantially L-shaped, and accordingly, only an elongated step 525 is formed in the fastening hole 522 of the base 51, and the elastic member 535 is fastened to the bottom end of the step 525. Preferably, a relief groove 523 is formed at the bottom end of the connector side wall 52 corresponding to one side of the fastening hole 522, so as to facilitate the elastic member 535 to be inserted into the fastening hole 522 and engaged with the step 525. Unlike the solution in the foregoing embodiment in which the outer surface of the vertical section 533 of the stopper is flush with the outer surface of the connector side wall 52, in this embodiment, the top end of the connector side wall 52 is provided with the accommodation groove 524 for accommodating the vertical section 533 of the stopper, and the top end of the connector side wall 52 is substantially U-shaped in cross section along the thickness direction of the connector side wall 52, thereby forming the accommodation groove 524. Wherein the top end of the connector side wall 52 is located at the outer side of the accommodation groove 524 higher than the inner side of the accommodation groove 524. When the insert 53 is inserted, the horizontal section 532 of the stopper portion is hung on a portion of the top end of the connector side wall 52 located inside the accommodation groove 524, and the vertical section 533 of the stopper portion is accommodated in the accommodation groove 524. In this embodiment, after assembly, the top end of the horizontal segment 532 of the limiting portion and the portion of the top end of the connector sidewall 52 located outside the accommodating groove 524 are on the same horizontal plane.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims

1. The motor is characterized by comprising a stator, a rotor and a motor end cover, wherein the stator comprises a stator shell and a permanent magnet fixed on the inner wall of the stator shell, the rotor comprises a rotating shaft, an iron core and a commutator fixed on the rotating shaft, and a winding wound on the iron core, and the motor end cover comprises an end cover shell and a connector; the end cover shell comprises an end cover shell and a mounting part, wherein the end cover shell is approximately hollow and cylindrical, and the mounting part is vertically arranged in the end cover shell and divides the space in the end cover shell into two cavities; the connector comprises a connector shell and an embedded part, wherein the connector shell comprises a base part and a connector side wall which are integrally formed, the connector side wall extends from the periphery of the base part, an opening is formed in one end, far away from the base part, of the connector side wall, the base part of the connector shell is connected to the outer side of the end cover shell, and the end cover shell of the end cover shell, the mounting part of the end cover shell, the base part of the connector and the connector side wall of the connector are integrally formed; the body part of the embedded part is approximately plate-shaped, the left end and the right end of the body part are propped against the inner sides of the two adjacent connector side walls, the embedded part is detachably connected with the connector shell, a groove extending from the opening towards the base part is formed in the embedded part, the groove of the embedded part is matched with the bulge of the external connector, the body part is connected to the inner side of the connector side wall, one side of the body part facing the cavity is parallel to the axis of the connector side wall, and the groove is formed in the side, and extends from the bottom end close to the body part to the top end of the body part; the embedded part comprises a body part and a limiting part, the limiting part extends outwards from the top end of the body part and turns over to form, an accommodating gap is formed between the limiting part and the body part, the accommodating gap is used for accommodating the corresponding top end of the side wall of the connector, the embedded part further comprises another limiting part, the other limiting part extends from the bottom end of the body part, and a clamping hole matched with the other limiting part in a clamping manner is formed in the position of the base part corresponding to the bottom end of the body part.

2. The motor of claim 1, wherein the top ends of the limiting portion and the body portion are in an inverted U shape, the outer side of the limiting portion is flush with the outer side of the connector side wall where the corresponding top end is located, and the top ends of the limiting portion and the rest of the top ends of the connector side wall except the corresponding top end are on the same horizontal plane.

3. The motor of claim 1, wherein the top ends of the limiting portion and the body portion are in an inverted U shape, and the corresponding top ends of the connector side walls are provided with receiving grooves for receiving the limiting portion.

4. The motor of claim 1, wherein the other limiting portion is a substantially L-shaped elastic member extending from the bottom end of the body portion, a step is formed in the fastening hole, and the elastic member is fastened to the bottom end of the step.

5. The motor of claim 1, wherein the other limiting portion is two elastic members extending from the bottom end of the body portion and having a substantially L shape, the bottom of the fastening hole forms two steps, and the two elastic members are respectively fastened to the bottom ends of the corresponding steps.

6. The motor of claim 1, wherein the groove penetrates the body portion in a thickness direction of the body portion.

7. The motor of claim 1, further comprising a terminal, wherein a connecting head side wall of the connecting head housing is provided with a communicating gap, and the base portion is provided with an insertion groove for inserting the terminal.

8. The motor of claim 1, further comprising a terminal insert molded to the base portion, one end of the terminal being located within the connector side wall and extending from the base portion toward the opening, the other end of the terminal being located outside the connector side wall.

9. The motor of claim 8, wherein the motor end cap further comprises a circuit board disposed on the mounting portion and located in one of the cavities, an inductor and a brush disposed on the mounting portion and located in the other cavity.