CN106533015B

CN106533015B - Lead fixing structure and motor with same

Info

Publication number: CN106533015B
Application number: CN201611100738.0A
Authority: CN
Inventors: 任丽君; 高晓峰; 李宁; 王周叶
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2016-12-05
Filing date: 2016-12-05
Publication date: 2023-04-28
Anticipated expiration: 2036-12-05
Also published as: CN106533015A

Abstract

The invention provides a lead fixing structure and a motor with the same. The wire harness component is fixedly arranged on the end face of the stator, so that the restraint on the power supply lead wire is conveniently and rapidly realized, the interference of the lead wire to the rotor is effectively avoided, and the assembly efficiency of the motor is improved.

Description

Lead fixing structure and motor with same

Technical Field

The invention relates to the technical field of motors, in particular to a lead fixing structure and a motor with the same.

Background

Along with the rapid development of brushless direct current motors, the control scheme of no position is prevailing gradually, and the motor lead is no longer through the switching of circuit board, but adopts the direct and stator lead connection of power cord, realizes the lead mode of no circuit board, but the power cord of this kind of scheme need tighten through sticky tape or pyrocondensation pipe to prevent that the power cord from interfering with the rotor, because the pencil length of motor different in phase (i.e. the distance length of wiring needle line position of different in phase), make and tighten power cord technology operation more complicated, influence production efficiency, so on the fixed problem of power cord pencil, need seek better scheme.

Disclosure of Invention

Accordingly, the invention aims to provide a lead fixing structure and a motor with the same, which can conveniently and rapidly realize the restraint of a motor power lead, avoid the interference of the power lead with a rotor due to the movement of the power lead and improve the assembly efficiency of the motor.

The invention provides a lead fixing structure, which adopts the following technical scheme:

a lead fixing structure for fixing a lead of a motor comprises a wire harness member for mounting on an end face of a stator of the motor, wherein in a mounted state, a cavity is formed between the wire harness member and the end face of the stator for accommodating the lead of the motor in the cavity.

Preferably, a first protrusion is provided on a side of the wire harness member facing the stator end face for catching the lead wire radially outside the first protrusion.

Preferably, the first protrusion is located at a radially inner edge of the harness member.

Preferably, the first protrusion is a circular arc-shaped strip-shaped protrusion.

Preferably, a first limiting structure is arranged on the wire harness member, a second limiting structure is arranged on the end face of the stator, and the first limiting structure is matched with the second limiting structure in an assembled state so as to limit the wire harness member.

Preferably, the first limiting structure is a second protrusion facing the end face of the stator, and the second limiting structure is a first groove for accommodating the second protrusion.

Preferably, the cross sections of the first groove and the second protrusion are rectangular; alternatively, the groove width of the first groove becomes gradually larger from the inside to the outside in the radial direction of the motor, and the second protrusion has a shape adapted to the first groove.

Preferably, the first limiting structure is a second protrusion facing the end surface of the stator, the second limiting structure is a third protrusion facing the wire harness member on the end surface of the stator, and the second protrusion is embedded between two adjacent third protrusions or the third protrusion is embedded between two adjacent second protrusions.

Preferably, the cross section of the second protrusion is rectangular or trapezoidal, and the gap between two adjacent third protrusions is rectangular or trapezoidal with matched shape; or the cross section of the third bulge is rectangular or trapezoidal, and the gap between two adjacent second bulges is rectangular or trapezoidal with matched shape.

Preferably, the second limiting structure is a third protrusion on the end face of the stator facing the wire harness member, and the first limiting structure is a second groove for accommodating the third protrusion.

Preferably, a gate structure is provided at the wire outlet end of the wire harness member, and the wire of the motor is passed out of the gate structure.

Preferably, the top edge of the gate structure is provided with a recess.

Preferably, the groove is an arc-shaped groove.

Preferably, the harness member is provided with a hole portion corresponding to a wire connection pin of the motor stator, the wire connection pin being inserted into the hole portion in an assembled state.

Preferably, the hole portion is a blind hole.

Another aspect of the present invention provides a motor, which adopts the following technical scheme:

an electric motor includes the lead fixing structure of the present invention.

According to the lead fixing structure, the restraint on the power supply lead is conveniently and rapidly realized through the installation and fixation of the wire harness component on the end face of the stator, the interference of the lead on the rotor is effectively avoided, and the motor assembly efficiency is improved. The preferred scheme can also play an insulating role, and an electricity isolating ring arranged between a traditional motor stator and an end cover can be omitted.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a structural exploded view of a conventional motor;

fig. 2 is an exploded view of the motor of the present invention;

fig. 3 is a view of the motor rotor omitted from fig. 2 to clearly show the lead fixing structure of the present invention;

fig. 4a is a front view of a preferred embodiment of a wire harness member of a wire fixing structure provided by the present invention;

fig. 4b is a perspective view of a preferred embodiment of a wire harness member of a wire fixing structure provided by the present invention;

fig. 5a is a perspective view of another preferred embodiment of a wire harness member of a wire fixing structure provided by the present invention;

fig. 5b is a front view of another preferred embodiment of a wire harness structure provided by the present invention;

FIG. 6 is a partial schematic view of a preferred embodiment of the motor stator of the present invention;

FIG. 7 is a partial schematic structural view of another preferred embodiment of the motor stator of the present invention;

1-a lead wire; 2-wire clip; 3-wire harness members; 3-1-a first bump; 3-2-hole portions; 3-3-second protrusions; 3-4-fourth protrusions; 3-5-gate structure; 3-6-cavity; 4-connecting pins; 5-end caps; 6-rotor; 7-a stator; 7-1-a first groove; 7-2-third protrusions; 8-isolating rings; 9-heat shrinking pipe.

Detailed Description

The present invention is described below based on examples, but the present invention is not limited to only these examples.

As shown in fig. 2 to 3, the present invention provides a lead fixing structure for fixing a lead 1 of a motor, the lead fixing structure including a wire harness member 3 for mounting on an end face of a stator 7 of the motor, a cavity 3-6 being formed between the wire harness member 3 and the end face of the stator 7 in a mounted state for accommodating the lead 1 of the motor in the cavity 3-6.

The conventional motor lead is tightly tied through the heat shrinkage tube 9 (or the adhesive tape) and the wire outlet clamp 2, as shown in fig. 1, the process operation is complex, the production efficiency is affected, and the interference problem of the lead to the rotor 6 cannot be well solved. The lead fixing structure provided by the invention has the advantages of simple operation process, improved production efficiency, simple structure, convenience in assembly and installation and capability of effectively avoiding interference of the lead 1 on the rotor 6, and is widely applied to various motors.

Further, a first protrusion 3-1 is provided on a side of the wire harness member 3 facing an end face of the stator 7 for catching the lead wire 1 on a radially outer side of the first protrusion 3-1. The first bump 3-1 may include a plurality of separate bumps or may be a continuous elongated bump (as shown in fig. 4-5), which can serve to block the lead 1 radially outward of the first bump 3-1. The first protrusion 3-1 may contact with the end surface of the stator 7 or may have a gap, wherein in the case where the first protrusion 3-1 has a gap with the end surface of the stator 7, preferably, the height of the gap between the first protrusion 3-1 and the end surface of the stator 7 is smaller than the diameter of the lead 1 to reliably block the lead 1 radially outside the first protrusion 3-1.

Further, the first protrusion 3-1 is located at a radially inner edge of the wire harness member 3. As shown in fig. 4-5, since the first protrusion 3-1 is located at the radially inner edge of the wire binding member 3, the cavity 3-6 of the wire binding member 3 is relatively large, and the wire 1 in the cavity 3-6 has a certain play margin, so that the phenomenon that the wire 1 is torn off does not occur, and the heat dissipation of the wire is also facilitated.

Further, the first protrusion 3-1 is a circular arc-shaped strip-shaped protrusion. As shown in fig. 4-5, preferably, the first protrusion 3-1 is a circular arc-shaped strip protrusion, so as to completely block the lead wire and avoid the interference of the lead wire to the rotor 6; still preferably, the wire harness member 3 is also in a circular arc structure, so that the wire harness member 3 is conveniently assembled on the end face of the stator 7, and the structure is compact.

Further, the wire harness member 3 is provided with a first limit structure, a second limit structure is arranged on the end face of the stator 7, and in an assembled state, the first limit structure is matched with the second limit structure so as to limit the wire harness member 3. In this way, when the wire harness member 3 accommodates the lead wire 1 in the cavity 3-6, the wire harness member 3 can be reliably limited on the end face of the stator 7 due to the effect of the limiting structure, and can not loosen due to the operation of the motor, and interference of the lead wire 1 to the rotor 6 can be avoided all the time.

Further, the first limiting structure is a second protrusion 3-3 facing the end surface of the stator 7, the second limiting structure is a first groove 7-1 for accommodating the second protrusion 3-3, and the second protrusion 3-3 is inserted into the first groove 7-1 in the assembled state of the wire harness member 3. As shown in fig. 4 and 6, in the assembled state of the wire harness member 3, the second protrusion 3-3 is inserted into the first groove 7-1 to limit the wire harness member 3, thereby preventing the wire harness member 3 from loosening.

Further, the cross sections of the first groove 7-1 and the second protrusion 3-3 are rectangular; after the second protrusion 3-3 is inserted into the first groove 7-1, limiting of the wire harness member 3 in the circumferential direction of the motor is achieved.

Preferably, the groove width of the first groove 7-1 is gradually increased from the inner side to the outer side in the radial direction of the motor, the second protrusion 3-3 has a shape matched with the first groove 7-1, and after the second protrusion 3-3 is inserted into the first groove 7-1, the limit of the wire harness member 3 in the radial inward direction of the motor can be realized besides the limit of the wire harness member 3 in the circumferential direction of the motor, still preferably, the first groove 7-1 is trapezoid, the second protrusion 3-3 is corresponding trapezoid, or the first groove 7-1 and the second protrusion 3-3 can also have other shapes capable of realizing the limit in the radial inward direction.

Further, the first limiting structure is a second protrusion 3-3 facing the end surface of the stator, the second limiting structure is a third protrusion 7-2 facing the wire harness member on the end surface of the stator, and the second protrusion 3-3 is embedded between two adjacent third protrusions 7-2, or the third protrusion 7-2 is embedded between two adjacent second protrusions 3-3. As shown in fig. 5 and 7, in the assembled state of the wire harness member, the third protrusion 7-2 is inserted into the adjacent two second protrusions 3-3 to limit the wire harness member 3, thereby preventing the wire harness member 3 from loosening.

Further, the cross section of the second protrusion 3-3 is rectangular or trapezoidal (the width dimension of the radial outer side is larger than the width dimension of the radial inner side), the gap between two adjacent third protrusions 7-2 is rectangular or trapezoidal with a shape fit, and the second protrusion 3-3 is embedded between two adjacent third protrusions 7-2, so that the wire harness member 3 is limited in the circumferential direction of the motor (including the radial inward direction in the case of trapezium). In another embodiment, the cross section of the third protrusion 7-2 is rectangular or trapezoidal (the width dimension of the radial outside is larger than the width dimension of the radial inside), the gap between two adjacent second protrusions 3-3 is rectangular or trapezoidal with a shape fit, as shown in fig. 5 and 7, the third protrusion 7-2 is embedded between two adjacent second protrusions 3-3, so as to limit the wire binding member 3 in the circumferential direction of the motor (including the radial inward direction in the case of trapezium). It is conceivable that the projections on one of the harness member 3 and the motor stator end face, and the space between the two projections on the other, may be other shapes that enable the restriction in the radially inward direction.

Alternatively, the second limiting structure is a third protrusion 7-2 on the stator end face facing the wire harness member 3, and the first limiting structure is a second groove (not shown) for accommodating the third protrusion 7-2.

Further, as shown in fig. 4-5, the wire outlet end of the wire harness member 3 is provided with a gate structure 3-5, and the wire 1 of the motor is passed out from the gate structure 3-5. Preferably, the wire harness member 3 is provided with a fourth protrusion 3-4, and is adjacent to the gate structure 3-5, and both the fourth protrusion 3-4 and the gate structure 3-5 function to block the lead wire 1.

Further, as shown in fig. 4, the top edge of the gate structure 3-5 is provided with a groove. Preferably, the grooves are arc-shaped grooves, the shapes of the grooves correspond to the shapes of the leads, so that the leads 1 of each phase are conveniently limited, and interference of the leads 1 on the rotor 6 is avoided; the grooves can also be saw-tooth grooves, and have the technical effect of compacting the lead wires.

Further, as shown in fig. 4 to 7, the harness member 3 is provided with a hole portion 3-2 corresponding to the connection pin 4 of the motor stator, and in the assembled state, the connection pin 4 is inserted into the hole portion 3-2. The hole portion 3-2 can accommodate both the wire connecting pin 4 and assist in positioning the wire harness member 3.

Further, the hole portion 3-2 is a blind hole so that the wire connecting needle 4 does not pass through the wire harness member 3, whereby the wire harness member 3 can also function as insulation, and thus an insulation sheet such as a spacer ring 8 or the like provided between the conventional motor stator 7 and the end cap 5 can be omitted.

As shown in fig. 2-3, the present invention also provides an electric motor comprising the lead fixing structure of the present invention as described above. Due to the adoption of the lead fixing structure, the lead fixing operation is simple, the production efficiency is improved, the interference of the lead on the rotor is effectively avoided, the insulation effect is achieved, and the insulation sheet arranged between the traditional motor stator and the end cover can be omitted. Preferably, the motor is a brushless direct current motor.

The lead fixing structure and the motor with the lead fixing structure solve the hidden trouble problem of interference between the rotor and the wobble when the power line is led out, realize effective insulation between the three-phase line and the end cover, save insulating sheets, improve production efficiency and facilitate implementation and production; the reliability of the motor can be improved. The realization process is simple, and the complex sleeve wire structure of the heat shrinkage tube is avoided.

When the lead fixing structure provided by the invention is adopted in the motor, the assembly method of the motor comprises the following steps: connecting (welding, etc.) the power line with the stator connection pin; and a second step of: according to the wire outlet direction, assembling a wire harness component on the end face of the stator to block a power wire; and a third step of: after the fixation of the string member is completed, the end cover is buckled. Compared with the mode of sleeving the heat shrinkage tube on the lead in the prior art, the assembly process is very simple, and the assembly efficiency is obviously improved.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lead fixing structure for fixing a lead of a motor, characterized by comprising a wire harness member for mounting on an end face of a motor stator, a cavity being formed between the wire harness member and the end face of the stator in a mounted state for accommodating the lead of the motor in the cavity; the wire harness component is provided with a first limiting structure, the end face of the stator is provided with a second limiting structure, and the first limiting structure is matched with the second limiting structure in an assembled state so as to limit the wire harness component;

the wire binding member is provided with first protruding towards one side of stator terminal surface to be used for keeping off the lead wire in the radial outside of first protruding, when first protruding with the stator terminal surface has the gap, first protruding with the gap height of stator terminal surface is less than the diameter of lead wire.

2. The wire fixing structure according to claim 1, wherein the first protrusion is located at a radially inner edge of the wire harness member.

3. The lead fixing structure according to claim 1, wherein the first projection is a circular arc-shaped strip-shaped projection.

4. The lead fixing structure according to claim 1, wherein the first limit structure is a second projection toward an end face of the stator, and the second limit structure is a first recess for accommodating the second projection.

5. The lead fixing structure according to claim 4, wherein the first recess and the second protrusion each have a rectangular shape in cross section; alternatively, the groove width of the first groove becomes gradually larger from the inside to the outside in the radial direction of the motor, and the second protrusion has a shape adapted to the first groove.

6. The wire fixing structure according to claim 1, wherein the first limit structure is a second protrusion facing the stator end face, the second limit structure is a third protrusion facing the wire harness member on the stator end face, and the second protrusion is embedded between two adjacent third protrusions, or the third protrusion is embedded between two adjacent second protrusions.

7. The lead fixing structure according to claim 6, wherein the cross section of the second bump is rectangular or trapezoidal, and the space between two adjacent third bumps is rectangular or trapezoidal with a shape fit; or the cross section of the third bulge is rectangular or trapezoidal, and the gap between two adjacent second bulges is rectangular or trapezoidal with matched shape.

8. The wire fixing structure according to claim 1, wherein the second limit structure is a third projection on a stator end face toward the wire harness member, and the first limit structure is a second recess for accommodating the third projection.

9. The wire fixing structure according to claim 1, wherein a wire outlet end of the wire harness member is provided with a gate structure from which a wire of the motor passes.

10. The lead fixation structure of claim 9, wherein a top edge of the gate structure is provided with a groove.

11. The lead fixation structure of claim 10, wherein the groove is an arcuate groove.

12. The wire fixing structure according to claim 1, wherein the wire harness member is provided with a hole portion corresponding to a wire connection pin of a motor stator, the wire connection pin being inserted into the hole portion in an assembled state.

13. The lead fixing structure according to claim 12, wherein the hole portion is a blind hole.

14. An electric machine comprising the lead fixing structure of any one of claims 1 to 13.