Oil inlet prevention structure of motor

Abstract

The utility model relates to a motor oil inlet prevention structure which comprises a motor end cover, a shaft seal and an oil retainer. A shaft through hole for the motor shaft to extend out is formed in the motor end cover, and the motor shaft is rotatably arranged on the inner side of the shaft through hole; the shaft seal is installed on the inner side of the shaft through hole and makes contact with the motor shaft. The oil deflector ring is located at the end, away from the shaft seal, of the motor end cover, an oil guide groove is formed in the inner side wall of the oil deflector ring, when the motor shaft rotates, lubricating oil close to the shaft seal moves towards the end, away from the shaft seal, of the oil guide groove, and when the motor shaft rotates, the oil guide groove pumps the lubricating oil close to the shaft seal. Therefore, the lubricating oil is prevented from being accumulated at the lip part of the oil seal, and the oil inlet risk of the motor is reduced.

Description

Technical Field

[0001] The utility model relates to the field of motor lubrication system structure design, in particular to a motor oil ingress prevention structure. Background Art

[0002] In the automotive electric drive industry, oil seals are usually used to prevent reducer lubricating oil from entering the motor. Since there is a large amount of lubricating oil in the reducer cavity, the lubricating oil will accumulate near the oil seal lip during operation. Excessive lubricating oil accumulation will reduce the reliability of the oil seal, thereby causing oil to enter the motor and shortening the motor life.

[0003] Therefore, it is necessary to improve and optimize the oil sealing method in the prior art. Utility Model Content

[0004] Based on the above description, the utility model provides to solve the above technical problems.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A motor oil ingress prevention structure, comprising: a motor end cover, a shaft seal and an oil retaining ring;

[0007] The motor end cover is formed with a shaft through hole through which the power supply shaft extends, and the motor shaft is rotatably arranged inside the shaft through hole;

[0008] The shaft seal is installed on the inner side of the shaft through hole and contacts with the motor shaft;

[0009] The oil deflector ring is located at one end of the motor end cover away from the shaft seal, and an oil guide groove is formed on the inner wall of the oil deflector ring. When the motor shaft rotates, the oil deflector ring is driven to rotate, driving the lubricating oil in the oil deflector ring to move along the oil guide groove toward the end away from the shaft seal.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0011] The motor oil ingress prevention structure provided in the present application is characterized by arranging an oil retaining ring on the outside of the shaft seal of the motor end cover, and arranging an oil guide groove on the inner wall of the oil retaining ring. When the motor shaft rotates, the oil guide groove forms a pumping effect on the lubricating oil near the shaft seal, so that the lubricating oil moves along the oil guide groove toward the end away from the shaft seal, thereby preventing the lubricating oil from accumulating at the lip of the oil seal and reducing the risk of oil ingress into the motor.

[0012] On the basis of the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, an oil drain hole is formed on the motor end cover, and a gap is formed between the motor end cover and the motor shaft. One end of the oil drain hole is connected to the gap, and the other end extends to the outside of the motor end cover. An oil drain plug is detachably installed on one end of the oil drain hole close to the outside of the motor end cover.

[0014] Furthermore, the oil drain hole is located at the lower end of the motor end cover.

[0015] Furthermore, the oil drain hole is arranged along the axial direction of the motor shaft.

[0016] Furthermore, the oil retaining ring is fastened to the motor end cover by screws.

[0017] Furthermore, the oil guide groove is a spiral groove opened along the inner wall of the oil retaining ring.

[0018] Furthermore, a motor bearing is installed on the inner side of the shaft through hole, and the motor bearing is arranged on a side of the shaft seal away from the oil retaining ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a motor oil ingress prevention structure provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle.

[0021] Figure 3 It is a structural schematic diagram of an embodiment of the present application in an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0024] It will be appreciated that spatial relationship terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, the element or feature described as "under other elements" or "under it" or "under it" will be oriented as "on" the other elements or features. Therefore, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0025] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0026] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0027] like Figure 1 and 2 As shown, an embodiment of the present application provides a motor oil ingress prevention structure, which includes a motor end cover 10, a shaft seal 20 and an oil retaining ring 30.

[0028] The motor end cover 10 is formed with a shaft through hole 10 a through which the motor shaft 40 extends, and the motor shaft 40 is rotatably disposed inside the shaft through hole 10 a.

[0029] It can be understood that the motor shaft 40 is a part of the motor rotor, which extends from the inside of the motor to the outside, wherein the motor end cover 10 is a part of the outer shell of the motor, and has a shaft through hole 10a therein, and the motor shaft 40 extends from the shaft through hole 10a.

[0030] The shaft seal 20 is installed on the inner side of the shaft through hole 10a and contacts the motor shaft 40. To ensure the sealing effect of the shaft seal 20, when installing the shaft seal 20, technicians in this field generally set the lip of the shaft seal 20 to correspond to the outer end of the motor.

[0031] The oil deflector 30 is located at one end of the motor end cover 10 away from the shaft seal 20. An oil guide groove 30a is formed on the inner wall of the oil deflector 30. When the motor shaft 40 rotates, the oil deflector 30 is driven to rotate, and the lubricating oil in the oil deflector 30 moves along the oil guide groove 30a to the end away from the shaft seal 20.

[0032] It can be understood that one end of the oil guide groove 30a corresponds to the shaft seal 20, and the other end corresponds to the outer space. When the motor shaft 40 rotates, the oil guide groove 30a forms a pumping effect on the lubricating oil near the shaft seal, so that the lubricating oil moves along the oil guide groove 30a to the end away from the shaft seal 20, thereby preventing the lubricating oil from accumulating at the lip of the oil seal 20 and reducing the risk of oil intrusion into the motor.

[0033] Preferably, the oil guide groove 30a is a spiral groove opened along the inner wall of the oil retaining ring 30, which can effectively enhance the pumping effect. In other embodiments, the oil guide groove can also be other structural shapes.

[0034] In this embodiment, an oil drain hole 10b is formed on the motor end cover 10, and a gap X is formed between the motor end cover 10 and the motor shaft 40. One end of the oil drain hole 10b is connected to the gap X, and the other end extends to the outside of the motor end cover 10. An oil drain plug 11 is detachably installed on one end of the oil drain hole 10b close to the outside of the motor end cover 10.

[0035] The gap X is located on the inner side of the shaft seal 20, and part of the lubricating oil that passes through the oil seal 20 can be discharged from the motor through the oil drain hole 10b to prevent the motor from entering with oil.

[0036] Preferably, the oil drain hole 10b is located at the lower end of the motor end cover 10 to facilitate the natural outflow of the lubricating oil.

[0037] More preferably, the oil drain hole 10b is arranged along the axial direction of the motor shaft 40, which can effectively shorten the length of the oil drain hole 10b and allow the lubricating oil to flow out as quickly as possible.

[0038] In this embodiment, the oil deflector 30 is fastened to the motor end cover 10 by screws. Preferably, the oil deflector 30 is evenly formed with three screw holes along the circumference, and three internal threaded holes are formed on the corresponding outer end side of the motor end cover 10 .

[0039] Preferably, a motor bearing 50 is installed on the inner side of the shaft through hole 10a, and the motor bearing 50 is arranged on the side of the shaft seal 20 away from the oil retaining ring 30. Preferably, the oil drain hole 10b is connected to one end of the gap X and is located between the motor bearing 50 and the shaft seal 20, further reducing the lubricating oil reaching the motor bearing 50.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor oil ingress prevention structure, characterized in that: include: Motor end cover, shaft seal and oil retainer ring; The motor end cover is formed with a shaft through hole through which the power supply shaft extends, and the motor shaft is rotatably arranged inside the shaft through hole; The shaft seal is installed on the inner side of the shaft through hole and contacts with the motor shaft; The oil retaining ring is located at one end of the motor end cover away from the shaft seal, and an oil guide groove is formed on the inner side wall of the oil retaining ring. When the motor shaft rotates, the lubricating oil near the shaft seal moves along the oil guide groove to the end away from the shaft seal.

2. The motor oil ingress prevention structure according to claim 1, characterized in that: include: An oil drain hole is formed on the motor end cover, and a gap is formed between the motor end cover and the motor shaft. One end of the oil drain hole is connected to the gap, and the other end extends to the outside of the motor end cover. An oil drain plug is detachably installed on one end of the oil drain hole close to the outside of the motor end cover.

3. The motor oil ingress prevention structure according to claim 2, characterized in that: The oil drain hole is located at the lower end of the motor end cover.

4. The motor oil ingress prevention structure according to claim 3, characterized in that: The oil drain hole is arranged along the axial direction of the motor shaft.

5. The motor oil ingress prevention structure according to claim 1, characterized in that: The oil retaining ring is fastened to the motor end cover by screws.

6. The motor oil ingress prevention structure according to claim 1, characterized in that: The oil guide groove is a spiral groove opened along the inner wall of the oil retaining ring.

7. The motor oil ingress prevention structure according to claim 1, characterized in that: A motor bearing is installed on the inner side of the shaft through hole, and the motor bearing is arranged on a side of the shaft seal away from the oil retaining ring.

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