阅读说明：本技术 爆震传感器 (Knock sensor ) 是由 梁开封 杜博 于 2019-05-06 设计创作，主要内容包括：本发明提供了一种爆震传感器,包括：本体,该本体由金属材料制成并包括具有中央通孔的呈圆柱形状的筒体和在筒体的下端部沿径向朝外延伸的凸缘,所述筒体包括靠近所述凸缘的下部段和远离所述凸缘的上部段；多个电子元器件,所述多个电子元器件至少包括从下至上依次套装在所述筒体上的下绝缘环、下电极环、压电元件、上电极环、上绝缘环、配重环；壳体,所述壳体通过树脂成型工艺一体地形成在所述本体的表面并包覆所述多个电子元器件。本发明还提供一种用于制造爆震传感器的方法。(The present invention provides a knock sensor including: a body made of a metal material and including a cylindrical barrel having a central through hole and a flange extending radially outward at a lower end portion of the barrel, the barrel including a lower section close to the flange and an upper section remote from the flange; the electronic components at least comprise a lower insulating ring, a lower electrode ring, a piezoelectric element, an upper electrode ring, an upper insulating ring and a counterweight ring which are sequentially sleeved on the cylinder from bottom to top; and the shell is integrally formed on the surface of the body through a resin molding process and covers the plurality of electronic components. The present invention also provides a method for manufacturing a knock sensor.)

1. A knock sensor, comprising:

a body (10), the body (10) being made of a metal material and comprising a cylindrical barrel (14) having a central through hole (15) and a flange (11) extending radially outwards at a lower end of the barrel, the barrel (14) comprising a lower section (12) proximal to the flange (11) and an upper section (13) distal to the flange (14);

the electronic components at least comprise a lower insulating ring (20), a lower electrode ring (30), a piezoelectric element (40), an upper electrode ring (50), an upper insulating ring (60) and a counterweight ring (70) which are sequentially sleeved on the barrel (14) from bottom to top; and

a case (90) integrally formed on the surface of the body (10) by a resin molding process and covering the plurality of electronic components;

the method is characterized in that:

the diameter of the upper section (13) of the cylinder (14) is larger than that of the lower section (12);

the counterweight ring (70) has a break (71); and is

The weight ring (70) is simultaneously aligned with the upper section (13) and the lower section (12) of the barrel, wherein the inner bore surface of the weight ring (70) is in direct contact with the outer circumferential surface of the upper section (13) of the barrel to form an electrical connection, and the radial gap between the inner bore surface of the weight ring (70) and the lower section (12) of the barrel is filled with resin for forming the housing (90).

2. The knock sensor according to claim 1, wherein a resin used to form the housing (90) is polybutylene terephthalate.

3. The knock sensor according to claim 1, wherein said piezoelectric element (40) is a lead zirconate titanate piezoelectric ceramic.

4. The knock sensor according to claim 1, wherein the upper insulating ring (60) and the lower insulating ring (20) are made of glass fiber, and a sheet thickness thereof is 0.25 mm.

5. The knock sensor of claim 1, wherein said upper electrode ring (50) and lower electrode ring (30) are made of CuZn37 having a platelet thickness of 0.5 mm.

6. The knock sensor according to claim 1, wherein the plurality of electronic components further include a fixing nut (80), the fixing nut (80) being screwed to the threaded section of the barrel (14) and pressing against an upper surface of the weight ring (70).

7. A method for manufacturing a knock sensor, comprising:

-making a body (10) from a metallic material, the body (10) comprising a cylindrical barrel (14) with a central through hole (15) and a flange (11) extending radially outwards at the lower end of the barrel, the barrel (14) comprising a lower section (12) close to the flange and an upper section (13) remote from the flange;

sleeving a plurality of electronic components on the barrel (14) from bottom to top in sequence, wherein the plurality of electronic components at least comprise a lower insulating ring (20), a lower electrode ring (30), a piezoelectric element (40), an upper electrode ring (50), an upper insulating ring (60) and a counterweight ring (70); and

integrally forming a case (90) on an outer surface of the body (10) by a resin molding process, the case (90) covering the plurality of electronic components;

the method is characterized in that:

the diameter of the upper section (13) of the cylinder (14) is larger than that of the lower section (12);

the counterweight ring (70) has a break (71); and is

The weight ring (70) is simultaneously aligned with the upper section (13) and the lower section (12) of the barrel, wherein the inner bore surface of the weight ring (70) is in direct contact with the outer circumferential surface of the upper section (13) of the barrel to form an electrical connection, and the radial gap between the inner bore surface of the weight ring (70) and the lower section (12) of the barrel is filled with resin forming the housing (90).