Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Oil seal

A technology of oil seals and sealing components, which is applied in bearing components, engine components, engine seals, etc.

Active Publication Date: 2017-04-26
NOK CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to perform an inspection based on setting the leakage allowable value, and a simple inspection cannot be performed by setting the leakage threshold value to zero (a disadvantage due to air release from the fabric)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oil seal
  • Oil seal
  • Oil seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] Next, embodiments of the present invention will be described based on the drawings.

[0072] figure 1 A main part cross section of the oil seal 1 according to the embodiment of the present invention is shown, figure 2 The state before combining the lip seal member 11 and the flinger 21 in the same oil seal 1 is shown.

[0073] figure 1 The oil seal 1 shown in is composed of a lip seal member 11 fixed to the inner periphery of a shaft hole of a housing (not shown), and an oil flinger 21 fixed to a rotating shaft (not shown) inserted through the shaft hole. Combination of these components prevents leakage of sealing fluid from inside A to outside B, and at the same time prevents dust from outside B from entering inside A. In addition, a dust cover 31 is combined with the lip seal member 11 and the flinger 21 .

[0074] The flinger 21 is made of a metal material, and a flange portion 21b is integrally formed radially outward at the inner end portion of the cylindric...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides an oil seal capable of reducing a sliding torque as compared with the case of using a fabric as a dustproof lip. In order to achieve this, the oil seal includes a lip seal member and an oil slinger and also includes a dust cover. The oil flinger has thread grooves facing radially outward on the outer end surface of the flange portion and exerting a suction function. The dust cover exerts the dust throwing action by the centrifugal force when the shaft rotates and the labyrinth sealing action by forming a small gap with the lip seal part. The lip seal includes a main lip and a dust lip. The dustproof lip is made of a rubber-like elastic body, and includes: a first corrugated portion that receives internal pressure between the lips on the outer peripheral surface while receiving atmospheric pressure on the inner peripheral surface; The pressure receiving area of ​​the first bellows is set to be larger than the pressure receiving area of ​​the second bellows.

Description

technical field [0001] The present invention relates to an oil seal as one type of sealing device related to sealing technology. The oil seal of the present invention is used, for example, in the field related to automobiles (engines), or in the field of general machinery. Background technique [0002] Such as Figure 5 As shown, an oil seal using a fabric 51 as a dust lip has been known, for example, in the field of automobile engines (diesel engines) for sealing the periphery of a crankshaft. [0003] In this prior art, the fabric 51 is constructed such that its initial inner diameter (the inner diameter before the flinger 52 is inserted) d 1 Set to the outer diameter d of the fabric sliding part of the flinger 52 2 Therefore, the fabric 51 has an interference. When the oil flinger 52 is inserted, the fabric 51 spreads along the oil flinger 52 to ensure the contact width with the oil flinger 52 . [0004] Therefore, here, since the interference amount of the fabric 51 i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/3232F16J15/447F16J15/3224F16J15/3244
CPCF16J15/164F16J15/32F16J15/3256F16J15/447F16J15/3244F16J15/3456F16C33/7823F16J15/002F16J15/3232
Inventor 中川岳洋
Owner NOK CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com