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Sealing device

A sealing device and contact surface technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve problems such as AM radio influence, achieve the effects of reducing sliding resistance, suppressing noise, and improving sealing performance

Pending Publication Date: 2021-10-01
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these electric vehicles, a drive motor is used as a power source, and the induced current generated in the drive motor becomes electromagnetic noise, which sometimes adversely affects AM radio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0033] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0034] figure 1 It is a partially enlarged cross-sectional view showing a schematic configuration of a motor drive device 100 for an electric vehicle using the sealing device 10 according to the first embodiment of the present invention. figure 2 It is a cross-sectional view along the axis x for showing a state in which the sealing device 10 according to the first embodiment of the present invention is attached to the gap between the opening 105 of the housing 103 and the output shaft 102 . image 3 and Figure 4 It is a sectional view showing the structure of the sealing device 10 according to the first embodiment of the present invention, taken along the axis x. In addition, in image 3 In FIG. 2 , a state in which the conductive grease G described later is not adhered to the interlip space is shown for the sake of explanation.

[0035] Hereinafter, for co...

no. 2 approach

[0077] Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. Hereinafter, configurations having the same or similar functions as those of the sealing device 10 according to the first embodiment will be assigned the same reference numerals and their descriptions will be omitted, and only different configurations will be described.

[0078] Figure 7 It is a cross-sectional view showing a cross-section along the axis of the structure of a sealing device 10A according to the second embodiment of the present invention. Such as Figure 7 As shown, the lip contact surface 36sA of the lip front end portion 36A of the sealing device 10A according to the second embodiment is different from the lip contact surface 36s of the lip front end portion 36 of the sealing device 10 described above. Specifically, the lip contact surface 36sA has groove-shaped unevenness on the annular surface facing the outer peripheral surface 102g of the ...

no. 3 approach ＞

[0081] Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. Hereinafter, structures having the same or similar functions as those of the sealing device 10 according to the first embodiment and the sealing device 10A according to the second embodiment are given the same reference numerals and their descriptions are omitted, and only the different structures will be described. .

[0082] Figure 8 It is a cross-sectional view showing a cross-section along the axis of the structure of the sealing device 10B according to the third embodiment of the present invention. Such as Figure 8 As shown, in the sealing device 10B according to the third embodiment, the lip contact surface 36sB in the lip front end portion 36B is different from the lip contact surface 36sA in the lip front end portion 36A included in the sealing device 10A described above. Specifically, the lip contact surface 36sB has pear-skin-like unevenness on the a...

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PUM

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Abstract

The occurrence of noise is suppressed while original sealing performance is maintained. A sealing device (10) comprises an annular reinforcing ring (20) encircling an axis line (x); an elastic body portion (30) that is attached to the reinforcing ring (20) and is an annular electroconductive elastic body encircling the axis line (x), and an electroconductive grease (G). The elastic body portion (30) has a base portion (31), a lip portion (35) extending along the axis line (x) from the base portion (31), and at least one annular dust lip (85) encircling the axis line (x). The lip portion (35) has, at the distal end thereof, a lip distal end section (36) having a lip contact surface (36s) on which the outer peripheral surface of the shaft is capable of sliding and which is formed to be capable of contact with an outer peripheral surface of a shaft. The lip contact surface (36s) has an annular surface facing the outer peripheral surface of the shaft. The electroconductive grease (G) is attached to at least part of an inter-lip space, which is an annular space formed between the lip contact surface (36s) and the dust lip (85) along the direction of the axis line (x).

Description

technical field [0001] The present invention relates to a sealing device, and more particularly, to a sealing device for preventing external intrusion of oil leakage, dust, etc. from the end of a rotating shaft in an automobile or the like. Background technique [0002] In recent years, the electrification of automobiles has progressed, and electric vehicles such as EV (Electric Vehicle, electric vehicle) and HV (Hybrid Vehicle, hybrid vehicle) have become mainstream. In these electric vehicles, a drive motor is used as a power source, and an induced current generated in the drive motor becomes electromagnetic noise, which may adversely affect AM radio. [0003] Therefore, a power transmission device for a vehicle has been proposed, which uses a metal conductive brush to conduct conduction between the case and the drive shaft to form a conduction path for grounding, thereby using the conduction path to release the noise from the cause of high-frequency noise. The leakage cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/78F16J15/3204
CPCF16J15/3232F16J15/324F16C19/06F16C33/7823F16C33/7886F16C19/527F16C2326/06H02K11/40F16J15/3208H02K5/10H02K5/124F16C33/7806F16J15/3204
Inventor 佐藤祐贵伊藤卓哉杉原弘惠谷田昌幸
Owner NOK CORP
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