Insulation end cover of new energy motor

Abstract

The utility model discloses an insulating end cover of a new energy motor, which relates to the technical field of motors, and comprises a motor body, a motor shaft arranged in the motor body in a penetrating manner, a motor front end cover, a motor rear end cover, a first bearing and a second bearing, the front end of the motor shaft is matched with the motor front end cover through the first bearing, and the second bearing is matched with the motor rear end cover through the second bearing. The rear end of the motor shaft is matched with the motor rear end cover through a second bearing; a first bearing chamber insert is arranged between the first bearing and the motor front end cover, first insulating plastic is arranged on the outer peripheral wall or the inner wall of the first bearing chamber insert, and second insulating plastic is arranged on the outer peripheral wall of the second bearing chamber insert. According to the utility model, insulating layers are formed between the first bearing and the motor front end cover and between the second bearing and the motor rear end cover, so that current on the motor shaft is prevented from passing through the first bearing and the second bearing, the first bearing and the second bearing are protected from electrocorrosion, the service life of the motor is prolonged, and the reliability of the motor is improved.

Description

Technical Field

[0001] The utility model relates to an insulating end cover of a new energy motor and belongs to the technical field of motors. Background Art

[0002] In the new energy vehicle industry, motors are the main power components of vehicles. With the development of new energy vehicles, the requirements for motors are getting higher and higher. In addition to considering indicators such as high efficiency and high power factor when designing motors, the reliability of the motor is also very important. The permanent magnet motors used in new energy vehicles generate shaft voltage due to factors such as high voltage and high switching frequency of the controller.

[0003] The motor shaft voltage will be transmitted to the housing through the bearing and then discharged to the ground, or form a loop current through the front and rear bearings and the housing. When the current passes through the bearing, it will cause electrical corrosion of the bearing, shorten the bearing life, and reduce the reliability of the motor. Therefore, a new solution is needed to solve this problem. Utility Model Content

[0004] The utility model aims to provide an insulating end cover of a new energy motor in order to overcome the deficiencies of the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an insulating end cover of a new energy motor, comprising a motor body, a motor shaft passing through the motor body, a motor front end cover, a motor rear end cover, a first bearing and a second bearing, wherein the front end of the motor shaft is matched with the motor front end cover through the first bearing, and the rear end of the motor shaft is matched with the motor rear end cover through the second bearing;

[0006] A first bearing chamber insert is arranged between the first bearing and the front end cover of the motor, the first bearing chamber insert is in a ring shape, a first insulating plastic is arranged on the first bearing chamber insert, and the first insulating plastic is used to block the current between the front end cover of the motor and the first bearing; a bearing inner cover is arranged on the inner side of the first bearing, the bearing inner cover is connected and fixed to the front end cover of the motor, and an insulating gasket is arranged between the bearing inner cover and the first bearing;

[0007] A second bearing chamber insert is arranged between the second bearing and the rear end cover of the motor. The second bearing chamber insert is in a circular ring shape. A second insulating plastic is arranged on the outer peripheral wall and the outer end surface of the second bearing chamber insert. The second insulating plastic is fixed to the rear end cover of the motor through insulating pins. The second insulating plastic is used to block the current between the second bearing and the rear end cover of the motor.

[0008] Preferably, the first insulating plastic is arranged on the outer peripheral wall and both side end faces of the first bearing chamber insert; wherein, an anti-slip pattern structure is arranged on the outer peripheral wall of the first bearing chamber insert, the first insulating plastic is coated on the outer peripheral wall and both side end faces of the first bearing chamber insert by injection molding, and the outer end of the first insulating plastic is fixed to the front end cover of the motor by insulating pins.

[0009] Preferably, the first insulating plastic is arranged on the inner wall of the first bearing chamber insert; wherein, an anti-slip pattern structure is arranged on the inner wall of the first bearing chamber insert, and the first insulating plastic is coated on the inner wall of the first bearing chamber insert by injection molding.

[0010] Preferably, an anti-slip pattern structure is provided on the outer peripheral wall of the second bearing chamber insert, and the second insulating plastic is coated on the outer peripheral wall and the outer end surface of the second bearing chamber insert by injection molding.

[0011] Preferably, the first insulating plastic and the second insulating plastic are both PEEK insulating plastics containing glass fibers.

[0012] Preferably, the front end cover and the rear end cover of the motor are both made of aluminum.

[0013] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0014] The utility model provides an insulating end cover of a new energy motor. A first insulating plastic is arranged on the outer peripheral wall or the inner wall of a first bearing chamber insert, and a second insulating plastic is arranged on the outer peripheral wall of a second bearing chamber insert, so that an insulating layer is formed between the first bearing and the front end cover of the motor and between the second bearing and the rear end cover of the motor, thereby blocking the current on the motor shaft from passing through the first bearing and the second bearing, protecting the first bearing and the second bearing from electrical corrosion, and thus improving the service life and reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0016] Attached Figure 1 This is a structural schematic diagram of an insulating end cover of a new energy motor described in the utility model;

[0017] Attached Figure 2 For attachment Figure 1 The enlarged view of point A in the middle;

[0018] Attached Figure 3 For attachment Figure 1 The enlarged view of point B in the middle;

[0019] Attached Figure 4 This is a structural schematic diagram of another implementation of an insulating end cover of a new energy motor described in the utility model.

[0020] In the figure: 1. motor body; 2. motor shaft; 3. motor front end cover; 4. motor rear end cover; 5. first bearing; 6. second bearing; 7. first bearing chamber insert; 8. first insulating plastic; 9. bearing inner cover; 10. insulating gasket; 11. second bearing chamber insert; 12. second insulating plastic; 13. insulating pin. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] As attached Figure 1-3 As shown, the insulating end cover of a new energy motor described in the utility model comprises a motor body 1, a motor shaft 2 passing through the motor body 1, a motor front end cover 3, a motor rear end cover 4, a first bearing 5 and a second bearing 6, wherein the motor front end cover 3 and the motor rear end cover 4 are both made of aluminum, the front end of the motor shaft 2 is matched with the motor front end cover 3 through the first bearing 5, and the rear end of the motor shaft 2 is matched with the motor rear end cover 4 through the second bearing 6.

[0023] A first bearing chamber insert 7 is arranged between the first bearing 5 and the front end cover 3 of the motor. The first bearing chamber insert 7 is in a circular ring shape. A first insulating plastic 8 is arranged on the first bearing chamber insert 7. The first insulating plastic 8 is a PEEK insulating plastic containing glass fiber. The first insulating plastic 8 is used to block the current between the front end cover 3 of the motor and the first bearing 5.

[0024] As attached Figure 1-2 As shown, in one embodiment, the first insulating plastic 8 is arranged on the outer peripheral wall and both side end faces of the first bearing chamber insert 7; wherein, an anti-slip pattern structure is provided on the outer peripheral wall of the first bearing chamber insert 7, and the first insulating plastic 8 is coated on the outer peripheral wall and both side end faces of the first bearing chamber insert 7 by injection molding, and the outer end of the first insulating plastic 8 is fixed to the front end cover 3 of the motor by an insulating pin 13.

[0025] As attached Figure 4 As shown, in another embodiment, the first insulating plastic 8 is arranged on the inner wall of the first bearing chamber insert 7; wherein, an anti-slip pattern structure is arranged on the inner wall of the first bearing chamber insert 7, and the first insulating plastic 8 is coated on the inner wall of the first bearing chamber insert 7 by injection molding.

[0026] By arranging the first insulating plastic 8 on the outer peripheral wall and both ends of the first bearing chamber insert 7, or on the inner wall of the first bearing chamber insert 7, an insulating layer is formed between the first bearing 5 and the front end cover 3 of the motor, thereby blocking the current on the motor shaft 2 from passing through the first bearing 5, protecting the first bearing 5 from electrical corrosion, and thus improving the reliability of the motor.

[0027] A bearing inner cover 9 is provided on the inner side of the first bearing 5 , and the bearing inner cover 9 is connected and fixed to the front end cover 3 of the motor. An insulating gasket 10 is provided between the bearing inner cover 9 and the first bearing 5 , wherein the insulating gasket 10 is made of PEEK material. The bearing inner cover 9 and the first bearing 5 are insulated by the insulating gasket 10 to avoid leakage on the inner side of the first bearing 5 .

[0028] As attached Figure 3 As shown, a second bearing chamber insert 11 is arranged between the second bearing 6 and the rear end cover 4 of the motor. The second bearing chamber insert 11 is in a circular ring shape. The outer peripheral wall and outer end surface of the second bearing chamber insert 11 are provided with a second insulating plastic 12, wherein the second insulating plastic 12 is a PEEK insulating plastic containing glass fiber, and an anti-slip pattern structure is arranged on the outer peripheral wall of the second bearing chamber insert 11. The second insulating plastic 12 is coated on the outer peripheral wall and outer end surface of the second bearing chamber insert 11 by injection molding, and the second insulating plastic 12 is fixed to the rear end cover 4 of the motor by insulating pins 13. The second insulating plastic 12 is used to block the current between the second bearing 6 and the rear end cover 4 of the motor.

[0029] By arranging the second insulating plastic 12 on the outer peripheral wall and outer end face of the second bearing chamber insert 11, an insulating layer is formed between the second bearing 6 and the rear end cover 4 of the motor, thereby blocking the current on the motor shaft 2 from passing through the second bearing 6, protecting the second bearing 6 from electrical corrosion, and thus improving the reliability of the motor.

[0030] Of course, the second insulating plastic 12 can also be arranged on the inner wall of the second bearing chamber insert 11, and its structure is the same as the structure of the first insulating material arranged on the inner wall of the first bearing chamber insert 7, and it also has the effect of blocking current.

[0031] The above are only specific application examples of the utility model and do not constitute any limitation to the protection scope of the utility model; any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the utility model.

Claims

1. An insulating end cover of a new energy motor, characterized in that: The motor comprises a motor body (1), a motor shaft (2) inserted into the motor body (1), a motor front end cover (3), a motor rear end cover (4), a first bearing (5) and a second bearing (6); the front end of the motor shaft (2) is matched with the motor front end cover (3) through the first bearing (5), and the rear end of the motor shaft (2) is matched with the motor rear end cover (4) through the second bearing (6); A first bearing chamber insert (7) is arranged between the first bearing (5) and the front end cover (3) of the motor, the first bearing chamber insert (7) is in a circular ring shape, a first insulating plastic (8) is arranged on the first bearing chamber insert (7), and the first insulating plastic (8) is used to block the current between the front end cover (3) of the motor and the first bearing (5); a bearing inner cover (9) is arranged on the inner side of the first bearing (5), the bearing inner cover (9) is connected and fixed to the front end cover (3) of the motor, and an insulating gasket (10) is arranged between the bearing inner cover (9) and the first bearing (5); A second bearing chamber insert (11) is arranged between the second bearing (6) and the rear end cover (4) of the motor. The second bearing chamber insert (11) is in the shape of a circular ring. A second insulating plastic (12) is arranged on the outer peripheral wall and the outer end surface of the second bearing chamber insert (11). The second insulating plastic (12) is fixed to the rear end cover (4) of the motor through an insulating pin (13). The second insulating plastic (12) is used to block the current between the second bearing (6) and the rear end cover (4) of the motor.

2. The insulating end cover of a new energy motor according to claim 1 is characterized in that: The first insulating plastic (8) is arranged on the outer peripheral wall and both side end surfaces of the first bearing chamber insert (7); wherein an anti-slip pattern structure is arranged on the outer peripheral wall of the first bearing chamber insert (7), the first insulating plastic (8) is coated on the outer peripheral wall and both side end surfaces of the first bearing chamber insert (7) by injection molding, and the outer end of the first insulating plastic (8) is fixed to the front end cover (3) of the motor by an insulating pin (13).

3. The insulating end cover of a new energy motor according to claim 1 is characterized in that: The first insulating plastic (8) is arranged on the inner wall of the first bearing chamber insert (7); wherein an anti-slip pattern structure is arranged on the inner wall of the first bearing chamber insert (7), and the first insulating plastic (8) is coated on the inner wall of the first bearing chamber insert (7) by injection molding.

4. The insulating end cover of a new energy motor according to claim 1 is characterized in that: An anti-slip pattern structure is provided on the outer peripheral wall of the second bearing chamber insert (11), and the second insulating plastic (12) is coated on the outer peripheral wall and outer end surface of the second bearing chamber insert (11) by injection molding.

5. The insulating end cover of a new energy motor according to claim 1 is characterized in that: The first insulating plastic (8) and the second insulating plastic (12) are both PEEK insulating plastics containing glass fibers.

6. The insulating end cover of a new energy motor according to claim 1, characterized in that: The motor front end cover (3) and the motor rear end cover (4) are both made of aluminum.

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