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

Linear Solenoid

A solenoid and linear technology, applied in the field of linear solenoids, can solve the problems of weakening the magnetic attraction force of the plunger and the limitation of the magnetic circuit area of ​​the plunger, and achieve the effect of increasing the magnetic circuit area

Inactive Publication Date: 2019-01-01
DENSO CORP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the magnetic circuit area of ​​the plunger is limited, and the magnetic attraction force of the plunger may be weakened

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
  • Linear Solenoid
  • Linear Solenoid
  • Linear Solenoid

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0015] will refer to figure 1 The first embodiment is described. In the following description, figure 1 The left side in is called left, figure 1 The right side in is called right. In other words, based on figure 1 The left-right direction in the case shown in defines the left-right direction. However, it should be noted that the left-right direction is referred to only for descriptive purposes, and it should not limit the actual direction in the installation situation.

[0016] The linear solenoid of the present embodiment is used, for example, in an electromagnetic hydraulic control valve provided in a hydraulic controller of an automatic transmission. The electromagnetic hydraulic control valve has a hydraulic control valve (such as a spool valve or a ball valve) and a linear solenoid coupled to each other in the axial direction.

[0017] The hydraulic control valve is a normally closed or normally open three-way valve, and has a valve housing A such as a sleeve and a...

no. 2 example

[0053] will refer to figure 2 A second embodiment is described.

[0054] According to a second embodiment, a metal tube 14 that is non-magnetic, in other words made of a non-magnetic metal, is arranged on the inner surface of the coil former 8 in the radial direction, ie the radial inner surface. The inner diameter of the metal tube 14 is slightly larger than the outer diameter of the plunger 2 . Specifically, the metal tube 14 is made of a nonmagnetic metal thin plate (ie, a metal thin plate made of a material such as stainless steel or brass) to have a tube shape. The metal pipe 14 is inserted into the bobbin 8 so as to be located on the inner side of the bobbin 8 in the radial direction.

[0055] When the bobbin 8 expands under the influence of heat or the like, the inner diameter of the bobbin 8 may shrink. By arranging the metal tube 14 having an inner diameter slightly larger than the outer diameter of the plunger 2 on the inner side of the bobbin 8, the inner diamet...

no. 3 example

[0062] will refer to image 3 A third embodiment is described.

[0063] According to a third embodiment, a non-magnetic membrane part 15 , in other words made of a non-magnetic material, is arranged on the radially outer surface of the plunger 2 .

[0064] The membrane member 15 is provided (ie adhered) on the radially outer surface of the plunger 2 by a method such as plating or coating. The film member 15 may be made of a resin material such as Teflon (trademark) or a metal material such as copper or nickel.

[0065] According to the third embodiment, with the non-magnetic film member 15 disposed on the radially outer surface of the plunger 2, the same effects as those of the second embodiment can be obtained.

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

A linear solenoid has a coil, a plunger, a magnetic attractive core, and a magnetic delivery core. The coil generates a magnetic force when being energized. The plunger is supported to be movable in an axial direction on an inner side of the coil. The magnetic attractive core magnetically attracts the plunger in the axial direction by the magnetic force generated by the coil. The magnetic delivery core delivers a magnetic flux to an outer surface of the plunger. A shaft that is non-magnetic and extends in the axial direction is fixed on the inner side of the coil. The plunger has a shaft hole defined around an axial center of the plunger, and the shaft is inserted in the shaft hole. The plunger slides while being in contact with the shaft. One end of the shaft is fixed to the magnetically attractive core.

Description

technical field [0001] The present disclosure relates to a linear solenoid. Background technique [0002] Patent Document 1 ( JP2011-119329A ) discloses a technique related to a linear solenoid having a plunger provided on the inner side of a coil. According to the linear solenoid of Patent Document 1, the magnetically attracting core, the magnetically blocking member, and the magnetically conveying core are provided as a single component. A magnetic core axially magnetically facing the plunger attracts the plunger. The magnetic transport core has a tube shape and surrounds the plunger. The magnetic delivery core delivers the magnetic flux to the plunger radially. The magnetic blocking member has a thin thickness and is a magnetic saturation member. The magnetic blocking member prevents the direct flow of magnetic flux between the magnetic suction core and the magnetic transfer core. [0003] According to the linear solenoid of Patent Document 1, both the magnetic attra...

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): H01F7/06H01F7/123H01F7/17F16K31/06
CPCH01F7/1607H01F2007/163
Inventor 平野明孝
Owner DENSO 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