Motor and water pump thereof

Abstract

The utility model provides a motor with better safety and a corresponding water pump, through the scheme that a stator and a rotor are grounded at the same time, the situation of potential safety hazards caused by electric leakage of the stator and the rotor can be improved, the motor comprises a stator iron core, a rotor assembly, a conductive part and a first containing cavity, and the conductive part is used for grounding. The conductive part is electrically connected with the stator core, the rotor assembly comprises a motor shaft and a first bearing, the first bearing is correspondingly accommodated in the first accommodating cavity, the motor shaft penetrates through the first bearing, and the motor shaft is fixed with an inner ring of the first bearing; the conductive part is electrically connected with the motor shaft through the first bearing, and a part of the conductive part extends into the first containing hole and makes contact with the outer ring of the first bearing to be electrically connected with the outer ring of the first bearing.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of motor and the water pump of its belonging. BACKGROUND

[0002] When motor works, motor shaft rotates, to drive air or liquid etc. flow by driving centrifugal impeller fixed on motor shaft to rotate;Due to the conductivity of water and other liquids and the electric characteristics of dirty dust, etc. Situation, may appear electric leakage, for example, may appear electric leakage or the electricity carried by rotor and stator is transmitted to water and further to user;In prior art, there is lack of consideration for the electric leakage of the electricity carried by rotor and stator, which may cause stator and rotor discharge, user is electrified, etc. Hidden danger. UTILITY MODEL CONTENT

[0003] In view of the problems in the prior art, the utility model provides a motor with better safety, which simultaneously grounds the stator and rotor to improve the situation of hidden danger caused by stator and rotor electric leakage.

[0004] The utility model is realized by the following technical schemes:

[0005] A motor includes a stator core, a rotor assembly, a conductive component, and a first accommodating cavity. The conductive component is used for grounding, and the conductive component is electrically connected with the stator core. The rotor assembly includes a motor shaft and a first bearing. The first bearing is accommodated in the first accommodating cavity. The motor shaft penetrates through the first bearing, and the motor shaft is fixed with the inner ring of the first bearing. The conductive component is electrically connected with the motor shaft through the first bearing. A part of the conductive component extends into the first accommodating cavity and is in contact with the outer ring of the first bearing to be electrically connected.

[0006] Optionally, the first accommodating cavity is provided with an accommodating groove. The part of the conductive component extends into the accommodating groove. The first accommodating cavity has an annular circumferential surface. The annular circumferential surface surrounds the first bearing and is in close contact with the outer circumferential surface of the outer ring of the first bearing. The accommodating groove is recessed in the annular circumferential surface.

[0007] Optionally, a part of the conductive component is in abutment with the outer ring of the first bearing. The depth of the accommodating groove is less than the depth of the first accommodating cavity. The depth of the accommodating groove accounts for one-third to two-thirds of the depth of the first accommodating cavity. The part of the conductive component extends into the first accommodating cavity by one-third to two-thirds of the depth of the first accommodating cavity. At a position lower than the accommodating groove, the outer ring of the first bearing and the annular circumferential surface form a closed annular circumferential contact.

[0008] Optionally, the motor further comprises a positioning frame, an end cover part, and bolts, the first accommodating hole is formed in the end cover part, the motor shaft penetrates through the end cover part, the positioning frame is provided with a second accommodating hole, the rotor assembly further comprises a second bearing, the second bearing is accommodated in the second accommodating hole, the motor shaft penetrates through the second bearing, and the motor shaft is fixed with the inner ring of the second bearing; the end cover part and the positioning frame are fixed by the bolts, and the stator core is clamped and fixed between the end cover part and the positioning frame.

[0009] Optionally, the stator core is provided with a first penetrating hole, the bolt penetrates through the first penetrating hole, the conductive component comprises a contact part, the contact part abuts against the stator core, the contact part is provided with a second matching hole, the second matching hole corresponds to the position of the first penetrating hole in position, the bolt penetrates through the second matching hole and the first penetrating hole, and the stator core is clamped and in contact with the end cover part through the contact part.

[0010] Optionally, the end cover part further comprises an extension arm, the extension arm extends towards the stator core, the contact part is in the form of a sheet, the upper end of the extension arm has an adaptive region corresponding to the shape of the contact part, the contact part is embedded in the adaptive region, the bolt extends into and is screwed to the extension arm, and the stator core clamps the contact part with the extension arm.

[0011] Optionally, the upper end of the extension arm is further provided with a first clamping protrusion and a second clamping protrusion at intervals, the stator core is provided with a convex rib, the lower end of the convex rib is limited between the first clamping protrusion and the second clamping protrusion, the first clamping protrusion and the second clamping protrusion are located on the radial outside of the stator core, the first clamping protrusion is located on one side of the lower end of the convex rib, and the second clamping protrusion is located on the opposite side of the lower end of the convex rib; the positioning frame is provided with a positioning column, the positioning column is provided with a second penetrating hole, the bolt penetrates through the second penetrating hole, and the end portion of the positioning column adjacent to the stator core is provided with a blocking edge part, and the blocking edge part blocks the outside of the upper end of the convex rib.

[0012] Optionally, the motor further comprises a wind collecting cover and a heat dissipation fan, the wind collecting cover is detachably surrounded at the periphery of the positioning frame and the heat dissipation fan, and the wind collecting cover comprises a clamping hook matched with the positioning frame, and the clamping hook is hooked at the lower end of the blocking edge part.

[0013] Optionally, the bolt is made of conductive metal material, the bolt is in contact with the stator core and the contact part, and each layer of silicon steel sheet of the stator core is electrically connected to the contact part by means of the bolt.

[0014] Optionally, the motor further comprises an end cover part, the first accommodating hole is formed in the end cover part, the motor shaft penetrates through the end cover part, the end cover part further comprises a positioning protrusion for positioning the conductive component, the conductive component is provided with a first matching hole corresponding to the positioning protrusion, and the positioning protrusion penetrates through the first matching hole.

[0015] Optionally, the motor further comprises an end cover part, the first accommodating cavity is arranged in the end cover part, and the motor further comprises a water seal sleeved on the motor shaft, the end cover part further comprises a third accommodating cavity and a ring wall separating the first accommodating cavity and the third accommodating cavity, the ring wall surrounds the motor shaft, and the water seal is accommodated in the third accommodating cavity.

[0016] Optionally, the motor further comprises a heat dissipation fan, the heat dissipation fan is fixed on the motor shaft, the rotor assembly further comprises a second bearing, the second bearing is mounted on the motor shaft, and the heat dissipation fan, the second bearing, the first bearing and the water seal are sequentially arranged in the axial direction of the motor shaft.

[0017] Optionally, the motor further comprises a wind collecting cover and a positioning frame, the wind collecting cover is detachably sleeved on the periphery of the positioning frame, the heat dissipation fan is located in the upper end of the wind collecting cover, the positioning frame is fixed together with the stator core, the heat dissipation fan drives air to form a heat dissipation airflow when working, at least part of the heat dissipation airflow passes between the stator core and the end cover part, passes through the stator core upwards, and dissipates heat for the stator core and the rotor assembly, and is discharged from the upper end of the wind collecting cover upwards.

[0018] Optionally, the motor further comprises a grounding wire, the conductive part is composed of a bent metal sheet, and the conductive part is grounded by being connected with the grounding wire; the conductive part comprises a grounding end for being connected with the grounding wire, the part of the conductive part constitutes a contact end for contacting with the outer ring of the first bearing, the grounding end is located at the outside of the motor, the contact end is located at the inside of the motor, and the part of the conductive part between the grounding end and the contact end constitutes a stepped shape.

[0019] The application further provides a water pump comprising the motor. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a perspective view of the motor of the application;

[0021] Figure 2 FIG. 2 is an exploded view of the motor of the application;

[0022] Figure 3 FIG. 3 is a vertical sectional view of the motor of the application;

[0023] Figure 4 FIG. 4 is a perspective view of the end cover part and the conductive part of the motor of the application in a state of being together;

[0024] Figure 5 FIG. 5 is a perspective view of the end cover part of the motor of the application;

[0025] Figure 6 FIG. 6 is another perspective view of the end cover part of the motor of the application;

[0026] Figure 7 FIG. 7 is a perspective view of the conductive part of the motor of the application. DETAILED DESCRIPTION

[0027] According to Figures 1-7 An electric machine 1 for water pump is shown, the electric machine 1 comprises a stator core 2, a rotor assembly 4, an end cover part 5, a locating frame 6, a wind collecting cover 7, a conductive part 8, a water seal 90, an annular spring 91, the rotor assembly 4 comprises a motor shaft 40, a first bearing 41, a second bearing 42; the end cover part 5 comprises a first accommodating cavity 51, the first accommodating cavity 51 is used for accommodating the first bearing 41, the motor shaft 40 penetrates through the first bearing 41, and the motor shaft 40 is fixed with the inner ring of the first bearing 41; the conductive part 8 is electrically connected with the stator core 2, specifically, the conductive part 8 is in contact with the stator core 2 to be electrically connected with the stator core 2; by the electrical conductivity of the first bearing 41, the conductive part 8 is electrically connected with the motor shaft 40 through the first bearing 41, the conductive part 8 is in contact with the outer ring 410 of the first bearing 41, one end of the conductive part 8 extends into the first accommodating cavity 51 and closely abuts with the outer ring 410 of the first bearing 41, so that the conductive part 8 is electrically connected with the outer ring 410 of the first bearing 41, and the conductive part 8 is grounded. The conductive part 8 is in contact with the stator core 2 to realize grounding of the stator core 2; meanwhile, the conductive part 8 abuts with the outer ring 410 of the first bearing 41 to realize grounding of the rotor assembly 4; in summary, the stator and rotor can be grounded at the same time, which promotes higher safety of the electric machine and is beneficial to avoid electric shock hazards for users. The first bearing 41 adopts a waterproof bearing. In order to reliably contact the upper end of the contact end 80 with the outer ring 410 of the first bearing 41, the upper end of the contact end 80 is bent at an obtuse angle, and the contact end 80 is a metal sheet with a certain elasticity. Under the elastic force generated by the elastic deformation of the contact end 80, the outer ring 410 of the first bearing 41 is kept in slight extrusion with the contact end 80, and the contact is reliable;

[0028] The electric machine 1 further comprises a grounding wire, the conductive part 8 is composed of a bent metal sheet, and the conductive part 8 is grounded by being connected with the grounding wire; the conductive part 8 comprises a grounding end 83 for connecting with the grounding wire, and the part of the conductive part 8 constitutes a contact end 80 for contacting with the outer ring 410 of the first bearing 41, the grounding end 83 and the contact end 80 constitute opposite ends of the conductive part 8, the grounding end 83 is located outside the electric machine 1, so as to facilitate connection with the grounding wire, and the contact end 80 is located inside the electric machine 1, and the part of the conductive part 8 between the grounding end 83 and the contact end 80 constitutes a stepped shape. The contact end 80 is in the form of a sheet, in this embodiment, the conductive part 8 is a bent metal sheet, and the conductive part 8 can adopt H62 brass with a thickness of 0.8 mm. The grounding end 83 has a flanged hole 830, and the grounding wire is locked on the flanged hole 830 by a screw.

[0029] The first accommodating hole 51 is provided with an accommodating groove 511 for accommodating the part of the conductive component 8 extending into the first accommodating hole 51. The end cover part 5 comprises a positioning protrusion 53, and the conductive component 8 is provided with a first matching hole 81 corresponding to the positioning protrusion 53. The positioning protrusion 53 penetrates the first matching hole 81 to preliminarily position the conductive component 8 relative to the end cover part 5. The part of the conductive component 8 extends into the accommodating groove 511 of the first accommodating hole 51. The first accommodating hole 51 has an annular circumferential surface 510 surrounding the first bearing 41 and tightly abutting the outer circumferential surface of the outer ring 410 of the first bearing 41 to ensure the position stability of the first bearing 41 and the sealing between the annular circumferential surface 510 and the outer ring 410 of the first bearing 41. The accommodating groove 511 is recessed in the annular circumferential surface 510.

[0030] The depth of the accommodating groove 511 is less than the depth of the first accommodating hole 51, and the depth of the accommodating groove 511 accounts for one third to two thirds of the depth of the first accommodating hole 51. The part of the conductive component 8 extending into the first accommodating hole 51 accounts for one third to two thirds of the depth of the first accommodating hole 51, so as to reduce the weakening of the sealing between the outer ring 410 of the first bearing 41 and the annular circumferential surface 510 by the accommodating groove 511 and the part of the conductive component 8. At the position with a height lower than that of the accommodating groove 511, the outer ring 410 of the first bearing 41 and the annular circumferential surface 510 form a closed annular circumferential contact, so as to facilitate the sealing between the outer ring 410 of the first bearing 41 and the annular circumferential surface 510. The outer ring 410 of the first bearing 41 and the annular circumferential surface 510 can be attached with sealing glue.

[0031] The motor 1 further comprises a bolt 92, the stator core 2 is provided with a first through hole 21, the end cover part 5 and the positioning frame 6 are fixed by the bolt 92, the stator core 2 is clamped and fixed between the end cover part 5 and the positioning frame 6, and the bolt 92 penetrates through the first through hole 21. The conductive part 8 comprises a contact part 82, the contact part 82 abuts against the stator core 2, realizes electrical connection between the conductive part 8 and the stator core 2, the contact part 82 is provided with a second matching hole 820, the second matching hole 820 corresponds to the position of the first through hole 21, the bolt 92 penetrates through the second matching hole 820 and the first through hole 21, and the stator core 2 clamps the contact part 82 with the end cover part 5. Thus, the design is beneficial to realize stable positioning of the conductive part 8 and reliable electrical connection with the stator core 2; the end cover part 5 further comprises an extension arm 50, the extension arm 50 extends towards the stator core 2, the contact part 82 is in a sheet shape, the upper end of the extension arm 50 has an adaptive region 500 corresponding to the shape of the contact part 82, the contact part 82 is embedded in the adaptive region 500, the bolt 92 extends into and is screwed to the extension arm 50, and the stator core 2 clamps the contact part 82 with the extension arm 50. The adaptive region 500 plays a role of preliminary positioning of the contact part 82; the upper end of the extension arm 50 is further provided with a first clamping protrusion 502 and a second clamping protrusion 503, the stator core 2 is provided with a convex rib 20, the lower end of the convex rib 20 is limited between the first clamping protrusion 502 and the second clamping protrusion 503, the first clamping protrusion 502 and the second clamping protrusion 503 are located on the radial outside of the stator core 2, the first clamping protrusion 502 is blocked on one side of the lower end of the convex rib 20, and the second clamping protrusion 503 is blocked on the opposite side of the lower end of the convex rib 20.

[0032] The extension arm 50 has a metal nut 501, the bolt 92 is locked to the metal nut 501, the plastic part of the extension arm 50 is formed integrally with the metal nut 501, specifically, the plastic part of the extension arm 50 is integrally formed with the metal nut 501 when being injection molded; thus, the design is beneficial to ensure that the end cover part 5, the stator core 2 and the positioning frame 6 are reliably combined together through reliable locking of the bolt 92 and the metal nut 501, and is also beneficial to ensure that the stator core 2 always closely abuts against the conductive part 8; the positioning frame 6 is provided with a second accommodating hole 61, and the second bearing 42 is accommodated in the second accommodating hole 61.

[0033] The positioning frame 6 has positioning columns 64 distributed along the circumference of the second accommodating hole 61, the positioning columns 64 are provided with second through holes 641 matched with the bolts 92, and the bolts 92 penetrate through the second through holes 641. The lower end of the positioning column 64 extending away from the stator core 2 is provided with a stop edge 642, the stop edge 642 is shielded outside the upper end of the convex rib 20, and the stop edge 642 is clamped on the upper end of the convex rib 20. The lower end of the positioning column 64 abuts against the stator core 2; the stop edge 642 is arc-shaped. In the embodiment, the bolt 92 is made of conductive metal material, and is in contact with the stator core 2 and the contact part 82, and each layer of silicon steel sheets of the stator core 2 is also electrically connected to the contact part 82 through the bolt 92.

[0034] The water seal 90 is sleeved on the motor shaft, the end cover part 5 further includes a third accommodating hole 54 and a ring wall 55 separating the first accommodating hole 51 and the third accommodating hole 54, the ring wall 55 surrounds the motor shaft 40, and the water seal 90 is accommodated in the third accommodating hole 54. The water seal 90 is sealed between the motor shaft. The main sealing lip 901 and the auxiliary sealing lip 902 of the water seal 90 are made of wear-resistant plastic material and have a certain self-lubricating property, the water seal 90 has a metal support frame structure inside, the main sealing lip 901 and the auxiliary sealing lip 902 respectively surround the motor shaft 40 and are in interference fit with the motor shaft 40, the water seal 90 and the third accommodating hole 54 of the lower support also adopt interference fit, so as to ensure the sealing between the water seal 90 and the inner surface of the third accommodating hole 54; the water seal 90 is provided with an annular groove 900 in the circumference, the annular spring 91 is located in the annular groove 900, and the water seal 90 is a flexible member, under the elastic tightening action of the annular spring 91, the main sealing lip 901 is tightly attached to the motor shaft 40, so as to ensure effective sealing and prevent the main sealing lip 901 from deforming due to friction and heating with the motor shaft 40 and thus causing water leakage.

[0035] The motor 1 further includes a fan cover 7, the positioning frame 6 and a cooling fan 93, the fan cover 7 is detachably sleeved on the periphery of the positioning frame 6, the cooling fan 93 is located in the upper end of the fan cover 7, the positioning frame 6 is fixed together with the stator core 2, and the fan cover 7 is detachably and fixedly connected with the positioning frame 6. In the embodiment, the fan cover 7 includes clamping hooks 71 matched with the positioning frame 6, the two clamping hooks 71 are symmetrically distributed, the clamping hooks 71 are hooked on the positioning frame 6, and the relative fixation of the fan cover 7 and the positioning frame 6 is achieved; the clamping hooks 71 are hooked on the lower end of the stop edge 642, the stop edge 642 is fully utilized, and the fan cover 7 is more practical. The cooling fan 93 is fixed on the motor shaft 40, the second bearing 42 is installed on the motor shaft 40, and in the axial direction of the motor shaft 40, the cooling fan 93, the second bearing 42, the first bearing 41 and the water seal 90 are sequentially distributed. When the cooling fan 93 works, it drives air to form a cooling air flow by upwardly discharging air, at least part of the cooling air flow passes between the stator core 2 and the end cover part 5, penetrates through the stator core 2 upwardly and cools the stator core 2 and the rotor assembly 4, and is discharged upwardly from the upper end of the fan cover 7. The upper end of the motor shaft 40 is fixedly connected with the cooling fan 93.

[0036] The application also provides a water pump comprising the motor 1, the water pump further comprising an impeller fixed to the lower end of the motor shaft 40, the impeller being located at the lower side of the end cover part 5 and at least partially covered by the end cover part 5, the impeller being rotatable under the driving of the motor shaft 40 to discharge water.

[0037] The above embodiment is only a preferred embodiment of the utility model, and does not limit the protection scope of the utility model, so that: all equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope defined by the claims of the utility model.

Claims

1. An electric machine characterized by: The motor comprises a stator core, a rotor assembly, a conductive part, and a first accommodating cavity, the conductive part is used for grounding, the conductive part is electrically connected with the stator core, the rotor assembly comprises a motor shaft and a first bearing, the first bearing is accommodated in the first accommodating cavity, the motor shaft penetrates through the first bearing, and the motor shaft is fixed with an inner ring of the first bearing; the conductive part is electrically connected with the motor shaft through the first bearing, and a part of the conductive part extends into the first accommodating cavity and is in contact with an outer ring of the first bearing to be electrically connected.

2. The electric machine of claim 1, wherein: The first accommodating cavity is provided with an accommodating groove, the part of the conductive part extends into the accommodating groove, the first accommodating cavity has an annular circumferential surface which surrounds the first bearing and is tightly attached to an outer circumferential surface of the outer ring of the first bearing, and the accommodating groove is recessed in the annular circumferential surface.

3. The electric machine of claim 2, wherein: The part of the conductive part is in abutment with the outer ring of the first bearing, the depth of the accommodating groove is less than the depth of the first accommodating cavity, the depth of the accommodating groove accounts for one third to two thirds of the depth of the first accommodating cavity, the part of the conductive part extends into the first accommodating cavity by one third to two thirds of the depth of the first accommodating cavity, and a closed annular circumferential contact is formed between the outer ring of the first bearing and the annular circumferential surface at a position with a height lower than that of the accommodating groove.

4. The electric machine of claim 1, wherein: The motor further comprises a positioning frame, an end cover, and a bolt, the first accommodating cavity is arranged in the end cover, the motor shaft penetrates through the end cover, the positioning frame is provided with a second accommodating cavity, the rotor assembly further comprises a second bearing, the second bearing is accommodated in the second accommodating cavity, the motor shaft penetrates through the second bearing, and the motor shaft is fixed with an inner ring of the second bearing; the end cover and the positioning frame are fixed by the bolt, and the stator core is clamped and fixed between the end cover and the positioning frame.

5. The electric machine of claim 4, wherein: The stator core is provided with a first through hole, the conductive part comprises a contact part which is attached to the stator core, the contact part is provided with a second matching hole which is in position correspondence with the first through hole, the bolt penetrates through the second matching hole and the first through hole, and the stator core is clamped and contacted with the end cover through the contact part.

6. The electric machine of claim 5, wherein: The end cover further comprises an extension arm which extends towards the stator core, the contact part is in a sheet shape, an upper end of the extension arm has an adaptive region which corresponds to the shape of the contact part, the contact part is embedded in the adaptive region, the bolt extends into and is screwed to the extension arm, and the stator core clamps the contact part with the extension arm.

7. The electric machine of claim 6, wherein: The upper end of the extension arm is further provided with a first clamping protrusion and a second clamping protrusion which are spaced apart, the stator core is provided with a convex rib, a lower end of the convex rib is limited between the first clamping protrusion and the second clamping protrusion, the first clamping protrusion and the second clamping protrusion are located on the outer side of the stator core in the radial direction, the first clamping protrusion is located on one side of the lower end of the convex rib, and the second clamping protrusion is located on the opposite side of the lower end of the convex rib; the positioning frame has a positioning column which is provided with a second through hole, the bolt penetrates through the second through hole, and an end portion of the positioning column which is adjacent to the stator core is provided with a blocking edge portion which blocks the outer side of the upper end of the convex rib.

8. The electric machine of claim 7, wherein: The motor further comprises a wind collecting cover and a cooling fan, the wind collecting cover is detachably sleeved on the outer periphery of the positioning frame and the cooling fan, the wind collecting cover comprises a clamping hook matched with the positioning frame, and the clamping hook is hooked on the lower end of the baffle portion.

9. The electric machine of claim 4, wherein: The conductive component comprises a contact portion abutting against the stator core, the bolt is made of conductive metal material, the bolt is in contact with the stator core and the contact portion, and each layer of silicon steel sheet of the stator core is electrically connected to the contact portion by means of the bolt.

10. The electric machine of claim 1, wherein: The motor further comprises an end cover portion, the first accommodating hole is arranged in the end cover portion, the motor shaft penetrates through the end cover portion, the end cover portion further comprises a positioning protrusion for positioning the conductive component, the conductive component is provided with a first matching hole corresponding to the positioning protrusion, and the positioning protrusion penetrates through the first matching hole.

11. The electric machine of claim 1, wherein: The motor further comprises an end cover portion, the first accommodating hole is arranged in the end cover portion, the motor further comprises a water seal sleeved on the motor shaft, the end cover portion further comprises a third accommodating hole and a ring wall separating the first accommodating hole and the third accommodating hole, the ring wall surrounds the motor shaft, and the water seal is accommodated in the third accommodating hole.

12. The electric machine of claim 11, wherein: The motor further comprises a cooling fan, the cooling fan is fixed on the motor shaft, the rotor assembly further comprises a second bearing, the second bearing is installed on the motor shaft, and the cooling fan, the second bearing, the first bearing and the water seal are sequentially arranged in the axial direction of the motor shaft.

13. The electric machine of claim 12, wherein: The motor further comprises a wind collecting cover and a positioning frame, the wind collecting cover is detachably sleeved on the outer periphery of the positioning frame, the cooling fan is located in the upper end of the wind collecting cover, the positioning frame is fixed together with the stator core, the cooling fan drives air to form a cooling air flow when working, at least part of the cooling air flow passes between the stator core and the end cover portion, penetrates through the stator core upwards, and cools the stator core and the rotor assembly, and is discharged from the upper end of the wind collecting cover upwards.

14. The electric machine of claim 1, wherein: The motor further comprises a grounding wire, the conductive component is made of a bent metal sheet, and the conductive component is grounded by being connected with the grounding wire; the conductive component comprises a grounding end for being connected with the grounding wire, the part of the conductive component constitutes a contact end for being in contact with the outer ring of the first bearing, the grounding end is located outside the motor, the contact end is located inside the motor, and the part of the conductive component between the grounding end and the contact end constitutes a stepped portion.

15. A water pump characterized by: The motor comprises the motor according to any one of claims 1-14.

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