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Rotation detection sensor

A technology for detecting sensors and detected objects, which is applied to measuring instrument components, instruments, and electric/magnetic devices to transmit sensing components, etc., and can solve problems such as deterioration of wires, poor sealing of wheel speed sensors 110, and decline in detection accuracy

Inactive Publication Date: 2004-05-05
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, if the melted hot-melt coating 103 intrudes into the detection part 107, it will cause deterioration of the internal wires, etc.
In addition, due to the melting of the hot-melt coating 103, the sealing performance of the wheel speed sensor 110, etc. is deteriorated, and the detection accuracy is reduced.

Method used

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Examples

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Embodiment Construction

[0025] A rotation detection sensor according to an embodiment of the present invention will be described. The rotation detection sensor detects the change of the magnetic field generated by the rotation of the object to be detected by the detection part, and converts it into an electric signal. The detection part is installed on the bracket. The detection unit is inserted through the opening of the capped cylindrical sleeve and attached to the cap side. The bracket part fits into the opening part.

[0026] The portion between the edge of the opening and the bracket is filled with a synthetic rubber-based solvent-based sealant over the entire circumference. Furthermore, the edge of the opening and the holder are covered with a resin part.

[0027] As the synthetic rubber-based solvent-based sealant, a viscoelastic liquid gasket can be used, for example, a viscoelastic liquid gasket manufactured by Sumitomo Triem Co., Ltd. or a viscoelastic liquid gasket manufactured by Semed...

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Abstract

A rotation detection sensor, wherein a detection part (7) is installed in a metallic covered cylindrical casing (1) and a holder (2) is fitted into the opening part (1a) of the casing (1), a flange (11) is provided at the opening part (1a) of the casing (1) around the periphery of the opening end thereof and a viscoelastic liquid gasket (seal material) (12) is applied between the flange (11) and the holder (2) around the periphery thereof, and the opening end portion of the opening part (1a) of the casing (1) and the exposed holder (2) are covered with a resin part (4), whereby the viscoelastic liquid gasket (12) penetrates smoothly into a clearance between the casing (1) and the holder (2) to assure a sealability and, since the viscoelastic liquid gasket (12) has an excellent workability due to its rapid curing property allowing a solvent thereon to volatile rapidly, a rubber based elastic sealant is formed after the volatilization of the solvent.

Description

technical field [0001] The invention relates to a rotation detection sensor, in particular to a rotation detection sensor for detecting rotation such as an automobile wheel speed sensor and an engine revolution sensor. Background technique [0002] In order to detect the rotational speed of the vehicle wheels, for example, a wheel speed sensor is used. Here, a conventional wheel speed sensor will be described. like Figure 5 As shown, the detection part 107 of the wheel speed sensor 110 is inserted through the opening part 101a of the cylindrical sleeve 101 with a cover, and is attached to the cover example. The holder 102 made of resin is fitted into the opening 101a. [0003] Hot-melt paint 103 is applied to the part of the entire circumference between the edge of the opening 101a and the holder 102 to block it. Thereafter, the opening portion 101 a and the exposed portion of the holder 102 are covered with the resin portion 104 . [0004] Examples of the detection uni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/12G01D11/24G01P1/02G01P3/488
CPCG01D11/245G01P1/026
Inventor 松本义文杉本雅司
Owner SUMITOMO ELECTRIC IND LTD
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