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Knock sensor unit

A knock sensor and sensor technology, applied in the direction of instruments, thin plate connections, nuts, etc., can solve the problems of reduced installation work efficiency, lost threaded components, poor installation, etc., and achieve the effect of low cost and cost reduction.

Active Publication Date: 2019-02-12
NGK SPARK PLUG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, for the knock sensor that is installed using an independent threaded member, if it takes time to find the threaded member, or if the threaded member is lost, etc., the work efficiency of the installation will decrease
In addition, it is possible to use a threaded member that does not match the threaded member penetration hole, resulting in poor installation, etc.
And, in many cases, the threaded member can pass through the threaded member through hole of the sensor from any one of the two end faces of the sensor. Therefore, if the threaded member is installed in the direction opposite to the original penetration direction by mistake, there may be a problem in the sensor. The intended mounting surface is not correctly facing the mounting part

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0027] Refer to the following Figure 1 ~ Figure 4 A knock sensor unit according to an embodiment of the present invention will be described.

[0028] figure 1 shows the appearance of the knock sensor unit 100, figure 2 shows a cross-sectional view obtained by cutting the knock sensor 1 along the axial direction, image 3 is a cross-sectional view showing a state where the threaded member detachment preventing member 40 is in contact with the threaded member through hole of the knock sensor 1, Figure 4 A state in which the screw member detachment preventing member 40 is engaged with the screw member 30 is shown. The knock sensor unit 100 is composed of a knock sensor 1 , a screw member 30 , and a screw member detachment preventing member 40 .

[0029] exist figure 1 Among them, the knock sensor 1 has a threaded member through hole 11 (refer to figure 2 ), the so-called through-core non-resonant knock sensor. Knock sensor 1 is covered with case 3 made of synthetic res...

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PUM

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Abstract

The present invention provides a knock sensor unit that can provide a screw member to a knock sensor at a low cost and reliably prevent the screw member from coming off. The knock sensor unit has: a screw member (30) for sensor mounting; a knock sensor (1) formed with a threaded member through hole (11) through which the screw member is inserted; and a threaded member retaining member (40) used for preventing a threaded member penetrating through the threaded member through hole from falling out of the threaded member through hole. In the knock sensor unit (100), the threaded member retainingmember is formed to a ring having a thickness smaller than vertexes of adjacent threads of the threaded member, the threaded member retaining member is engaged with the thread, and the outer edge (40e) of the threaded member retaining member itself is formed as a concave-convex shaped protruding and immersing in the radial direction and in contact with the threaded member through hole.

Description

technical field [0001] The invention relates to a knock sensor unit for detecting knock occurring in an internal combustion engine. Background technique [0002] Conventionally, as a detection sensor for detecting knocking that occurs in an internal combustion engine such as an automobile, a device that detects vibration accompanying the knocking using a piezoelectric element has been widely used. As one of the mounting methods of such a knock sensor, there is a method in which a threaded member independent of the sensor is inserted into a threaded member through hole formed to pass through the sensor, and the tip of the threaded part protruding from the bottom surface of the sensor is screwed into the installation. threaded holes on the side. [0003] In addition, in the case of a knock sensor mounted using an independent threaded member, if it takes time to find the threaded member, or if the threaded member is lost, the work efficiency of the installation will decrease. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L23/26
CPCG01L23/221G01L23/26G01L23/22F16B41/002F16B19/02F16B43/001F16B5/02
Inventor 青井克树
Owner NGK SPARK PLUG CO LTD