CN211263511U

CN211263511U - Automobile engine speed sensor

Info

Publication number: CN211263511U
Application number: CN202020221310.7U
Authority: CN
Inventors: 李建
Original assignee: Ningbo Slinko Electronic Technology Co ltd
Current assignee: Ningbo Slinko Electronic Technology Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-08-14
Anticipated expiration: 2030-02-28

Abstract

The utility model discloses an automobile engine speed sensor design, including package plastic part (1), shell body (2), skeleton (3), coil (4) and sealing washer (5). The framework comprises a magnet (3 a), soft iron (3 b) and a contact pin (3 c). The coil is wound in a winding groove at the end part of the framework, and the incoming wire and the outgoing wire of the coil are wound on the contact pin through a wire passing groove arranged on the framework; after winding, the framework is arranged in the shell, the end face of the framework and the inner end face of the shell are sealed through the sealing ring, and the rest parts are sealed with the outside through the plastic-coated part. The design is a full-sealing structure, and can meet the long-term severe working condition requirement of the engine; the structure design is compact, the manufacturing process is simple, and the requirements of large-batch and low-cost automobile products can be met.

Description

Automobile engine speed sensor

Technical Field

The utility model relates to an automobile engine speed sensor.

Background

An automotive engine speed sensor is a component in an engine management system. The sensor is mounted on the engine block for detecting the position and rotational speed of the crankshaft. The sensor detects the teeth and grooves of the (magnetic) ferrous signal wheel and, as the signal wheel rotates, the magnetic flux passing through it changes, outputting a corresponding sinusoidal-like voltage signal. Thus, the output signal may be representative of the rotational speed and position of the crankshaft.

The current rotating speed sensor mainly has two structural modes:

1. an integral injection molding mode: and placing the wound framework in a plastic mold, and forming a peripheral structure through injection molding. The advantages of this method are: simple structure and high production efficiency. But the disadvantages are: the requirements on the design of a plastic mold and an injection molding process are very high, the internal enameled wire is easily damaged in the injection molding engineering, and the practical effect can be generated at a client place in serious cases.

2. The assembly type is as follows: the defect of an integrated injection molding mode is abandoned, the shell is designed into an assembly structure, and the whole product is produced in a full-assembly mode. The advantages of this approach are: the internal enameled wire cannot be damaged; the investment amount of the production line is small. But the disadvantages are: the number of parts is large, the assembly procedures are multiple, the requirement on workers is high, and the product cost is also high.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a new automobile engine revolution speed sensor design fully combines the advantage of integrative injection moulding formula and assembled structure to solve the existing problem in the current product.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

a rotating speed sensor of an automobile engine is characterized by comprising a plastic-coated piece (1), an outer shell (2), a framework (3), a coil (4) and a sealing ring (5). The framework comprises a magnet (3 a), soft iron (3 b) and a contact pin (3 c). The coil is wound in a winding groove at the end part of the framework, and the incoming wire and the outgoing wire of the coil are wound on the contact pin through a wire passing groove arranged on the framework; after winding, the framework is arranged in the shell, the end face of the framework and the inner end face of the shell are sealed through the sealing ring, and the rest parts are sealed with the outside through the plastic-coated part.

The utility model discloses a preferred embodiment, the temperature measurement end shell passes through metal bonding with the connecting wire shell, and welding methods such as laser welding, electron beam welding, argon arc welding guarantee inside cavity gas tightness and high temperature resistance.

In a preferred embodiment of the present invention, the frame comprises a magnet (3 a), a soft iron (3 b) and a pin (3 c), and may be an assembled structure or an integral injection molding structure.

In a preferred embodiment of the present invention, the soft iron on the framework is disposed at the end of the sensor through the small hole at the end of the outer shell. The end face of the framework, the inner end face of the outer shell and the soft iron are sealed through the sealing rings.

In a preferred embodiment of the present invention, after the framework is assembled with the outer shell, the framework is wrapped by the plastic wrapping member to seal with the outside.

The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.

Drawings

Fig. 1 is a schematic view of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the following embodiments.

Referring to fig. 1, the utility model discloses automobile engine revolution speed sensor, including plastic-coated member (1), shell body (2), skeleton (3), coil (4) and sealing washer (5). The framework comprises a magnet (3 a), soft iron (3 b) and a contact pin (3 c).

The framework (3) comprises a magnet (3 a), a soft iron (3 b) and a pin (3 c). The skeleton has two kinds of structural style: fabricated and injection molded in one piece. The assembly type is as follows: the plastic part is used as a part to be injected in advance, and is assembled with the magnet and the soft iron to form a framework; an integral injection molding mode: the magnet and the software are placed in a mold in advance, and the whole framework is formed through injection molding.

The coil (4) is wound in a winding groove at the end part of the framework (3), and the incoming wire and the outgoing wire of the coil (4) are wound on the contact pin through a wire passing groove arranged on the framework.

The framework wound with the coil is arranged inside the outer shell, and a sealing ring is arranged between the end face of the framework and the inner end face of the outer shell to seal the measuring end of the sensor.

The sensor output end is sealed with the outside through the cladding of package plastic part, and concrete implementation mode is: the assembled framework and the assembled shell body assembly are placed in a plastic mold, the sensor output electric connector is formed through injection molding, and meanwhile, the output end is wrapped in plastic, so that the integral sealing of the sensor is realized.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A rotating speed sensor of an automobile engine is characterized by comprising a plastic-coated piece (1), an outer shell (2), a framework (3), a coil (4) and a sealing ring (5), wherein the framework comprises a magnet (3 a), soft iron (3 b) and a contact pin (3 c), the coil is wound in a winding groove at the end part of the framework, and an incoming wire and an outgoing wire of the coil are wound on the contact pin through a wire passing groove arranged on the framework; after winding, the framework is arranged in the shell, the end face of the framework and the inner end face of the shell are sealed through the sealing ring, and the rest parts are sealed with the outside through the plastic-coated part.

2. A tachometer transducer according to claim 1, characterized in that the frame comprises a magnet (3 a), soft iron (3 b) and pins (3 c), either fabricated or integrally moulded.

3. A rotation speed sensor according to claim 1, wherein the soft iron on the framework is disposed on the end surface of the sensor through the small hole on the end of the outer shell, and the end surface of the framework, the end surface of the outer shell and the soft iron are sealed through sealing rings.

4. A speed sensor according to claim 1, wherein the skeleton is assembled with the outer casing and then sealed with the outside by being covered with a plastic covering.