Knock sensor

Abstract

The utility model provides a knock sensor which comprises a carrier, and an insulating ring, a piezoelectric ceramic, a second contact ring, a piezoelectric ceramic, a first contact ring and a balancing weight which are arranged on the carrier, and the balancing weight comprises a thread structure and a balancing weight ring. The threaded structure of the balancing weight is matched with the threaded part on the carrier, and other components are fixed on the carrier in a threaded combination mode, so that the assembling difficulty can be reduced by reducing parts, and meanwhile, the mounting cost is also reduced.

Description

Technical Field

[0001] The utility model relates to a knock sensor, in particular to a knock sensor which is simple and easy to install. Background Art

[0002] The conventional knock sensor has many parts, such as a carrier, a piezoelectric ceramic disposed on the carrier, a first contact ring, an insulating ring, a second contact ring, a counterweight, and a fixing device. Such a knock sensor has many parts and is very difficult to assemble. The knock sensor provided by the utility model can reduce the difficulty of assembly by reducing the number of parts, and also reduces the installation cost. Utility Model Content

[0003] The utility model aims to provide a knock sensor which has the advantages of convenient assembly and compact structure.

[0004] According to one aspect of the utility model, a knock sensor is provided, comprising:

[0005] Carrier;

[0006] Insulation ring;

[0007] Second touch ring;

[0008] Piezoelectric ceramics;

[0009] First touch ring;

[0010] Counterweight.

[0011] Preferably, the counterweight block comprises two parts: a threaded structure and a counterweight ring.

[0012] Preferably, the carrier comprises a base, a column portion extending from the base, and a threaded portion.

[0013] Preferably, the insulating ring, the second contact ring, the piezoelectric ceramic and the first contact ring are sequentially installed on the column part, the threaded structure of the counterweight block cooperates with the threaded part on the carrier, and the insulating ring, the second contact ring, the piezoelectric ceramic and the first contact ring are fixed on the carrier by threaded connection.

[0014] Preferably, the threaded structure and the counterweight ring are integrally formed.

[0015] Preferably, the threaded structure is a nut structure.

[0016] Preferably, the counterweight is annular.

[0017] Preferably, the carrier is provided with a through mounting hole.

[0018] The knock sensor provided by the utility model combines a counterweight block and a threaded structure into one, the threaded structure of the counterweight block cooperates with the threaded portion on the carrier, and the insulating ring, the insulating ring, the second contact ring, the piezoelectric ceramic, and the first contact ring are fixed on the carrier by threaded connection, thereby achieving the effect of reducing parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional exploded view of the knock sensor of the present utility model.

[0020] Figure 2 It is a stereoscopic diagram of the knock sensor of the present utility model.

[0021] Figure 3 It is a cross-sectional view of the knock sensor of the present utility model.

[0022] Among them, 100, knock sensor; 1, carrier; 11, base; 12, column part; 13, threaded part; 14, mounting hole; 2, insulating ring; 3, second contact ring; 4, piezoelectric ceramic; 5, first contact ring; 6, counterweight block; 61, threaded structure; 62, counterweight ring. DETAILED DESCRIPTION

[0023] Hereinafter, embodiments of the knock sensor of the present invention will be described with reference to the drawings.

[0024] See also Figure 1 As shown, the utility model provides a knock sensor 100, which includes According to one aspect of the utility model, a knock sensor 100 is provided, which includes a carrier 1, an insulating ring 2, a second contact ring 3, a piezoelectric ceramic 4, a first contact ring 5, and a counterweight 6. The counterweight 6 includes two parts: a threaded structure 61 and a counterweight ring 62, and the threaded structure 61 and the counterweight ring 62 are integrally formed.

[0025] The carrier 1, which cooperates with the counterweight 6 and assembles other components, includes a base 11, a column portion 12 and a threaded portion 13 extending from the base, and is provided with a mounting hole 14. During installation, the knock sensor 100 is installed on the cylinder block of the engine through the mounting hole 14.

[0026] See also Figure 2 and Figure 3 As shown, when assembling the knock sensor 100, the insulating ring 2, the second contact ring 3, the piezoelectric ceramic 4, and the first contact ring 5 are sequentially installed on the column portion 12, and the threaded structure 61 of the counterweight 6 cooperates with the threaded portion 13 on the carrier, and the insulating ring 2, the second contact ring 3, the piezoelectric ceramic 4, and the first contact ring 5 are fixed on the carrier 1 by threaded connection.

[0027] The threaded structure 61 of the counterweight block is a nut, and the counterweight ring 62 is annular.

[0028] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A knock sensor, comprising a carrier, an insulating ring arranged on the carrier, a second contact ring, a piezoelectric ceramic, a first contact ring and a counterweight, characterized in that: The counterweight block comprises a threaded structure and a counterweight ring, and the threaded structure and the counterweight ring are integrally formed.

2. The knock sensor according to claim 1, characterized in that: The carrier includes a base, a column portion extending from the base, and a threaded portion.

3. The knock sensor according to claim 2, characterized in that: The insulating ring, the second contact ring, the piezoelectric ceramic, and the first contact ring are sequentially installed on the column portion, the threaded structure of the counterweight block cooperates with the threaded portion on the carrier, and the insulating ring, the second contact ring, the piezoelectric ceramic, and the first contact ring are fixed on the carrier by threaded connection.

4. The knock sensor according to claim 3, characterized in that: The thread structure is a nut structure.

5. The knock sensor according to claim 3, characterized in that: The counterweight ring is annular.

6. The knock sensor according to claim 1, characterized in that: The carrier is provided with a through mounting hole.

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