CN215725679U

CN215725679U - Crankshaft position sensor

Info

Publication number: CN215725679U
Application number: CN202122148121.9U
Authority: CN
Inventors: 何必胥; 胡小炳; 李强
Original assignee: Shanghai Prevision Automotive Sensor Co ltd
Current assignee: Shanghai Prevision Automotive Sensor Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-02-01
Anticipated expiration: 2031-09-07

Abstract

The utility model provides a crankshaft position sensor, which relates to the technical field of sensors and comprises a shell, a flange package and a framework, wherein the flange package is arranged at the upper end of the shell, and the top end of the flange package is provided with a wire hole; the framework is inserted into the opening of the shell; a cavity is formed between the framework and the flange package; and a second soldering lug is mounted at the top end of the framework, a cable is welded on the second soldering lug and penetrates through the wire hole to be connected with an external circuit. The utility model has reasonable structural layout, can ensure the accurate positions and directions of the permanent magnet, the magnetic conductive electric core and the coil, and can not influence the accuracy of the sensor. In the actual production process, the damage of the injection molding process to the sensor components is reduced, and the use is safer.

Description

Crankshaft position sensor

Technical Field

The utility model relates to the technical field of sensors, in particular to a crankshaft position sensor.

Background

The crank position sensor, one of the most important sensors in the electronic engine control system, provides signals for ignition timing, confirming crank position, and detecting piston top dead center, crank angle, and engine speed. The magnetic pulse type crankshaft position sensor works by using the magnetic flux change of the induction coil of the signal generator when the rotor with gear rotates, so as to generate alternating induced electromotive force in the induction coil, and the alternating induced electromotive force is amplified and sent to the ECU.

Crankshaft position sensors are typically injection molded in an integral structure for protection; high pressure during injection molding is likely to cause extrusion of components inside the sensor, which is likely to cause component damage.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a crankshaft position sensor to solve the above problems.

In order to achieve the purpose, the crankshaft position sensor comprises a shell, a flange package and a framework, wherein the flange package is installed at the upper end of the shell, and the top end of the flange package is provided with a wire hole; the framework is inserted into the opening of the shell; a cavity is formed between the framework and the flange package; and a second soldering lug is mounted at the top end of the framework, a cable is welded on the second soldering lug and penetrates through the wire hole to be connected with an external circuit.

Further, the sensor further comprises: the permanent magnet and the framework are integrally molded by injection; the magnetic conductive electric core is positioned between the bottom of the shell and the permanent magnet and is integrally injection-molded with the shell; the upper end of the permanent magnet is provided with a first soldering lug fixedly connected with the framework; the lower end of the framework is provided with a limiting groove, and a coil is arranged in the limiting groove; the cavity inside the shell is filled with pouring sealant.

Furthermore, the bottom of the framework is clamped with the shell.

Further, the coil is connected with the first soldering lug through a lead, and the first soldering lug is connected with the second soldering lug through a lead.

Advantageous effects

The first soldering lug can be conveniently wound when unfolded, and a lead and a soldering joint can be protected by bending after soldering; the permanent magnet and the framework are integrally injection-molded, the magnetic conductive electric core and the shell are integrally injection-molded, and the relative positions of the permanent magnet, the magnetic conductive electric core and the coil can be limited by the design of the limiting groove; the cavity between the framework and the flange package isolates the cable from the pouring sealant inside the shell, the cable cannot be damaged in the actual production injection molding process, and the cable cannot be stressed by the pouring sealant in the use process.

The utility model has reasonable structural layout, can ensure the accurate positions and directions of the permanent magnet, the magnetic conductive electric core and the coil, and can not influence the accuracy of the sensor. In the actual production process, the damage of the injection molding process to the sensor components is reduced, and the use is safer.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention.

FIG. 2 is a schematic diagram of the external structure of the sensor of the present invention.

FIG. 3 is a structural diagram of the framework of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

To address the problems of the prior art, embodiments of the present invention provide a crankshaft position sensor.

Examples

The crankshaft position sensor comprises a shell 1, a flange package 2 and a framework 5, wherein the flange package 2 is installed at the upper end of the shell 1, and a wire hole is formed in the top end of the flange package 2; the framework 5 is inserted in the opening of the shell 1; a cavity is formed between the framework 5 and the flange package 2; the top end of the framework 5 is provided with a second welding sheet 8, a cable 9 is welded on the second welding sheet 8, and the cable 9 passes through the wire hole to be connected with an external circuit.

The sensor further includes: the permanent magnet 3 and the magnetic conductive electric core 4 are integrally injection-molded with the framework 5; the magnetic conductive electric core 4 is positioned between the bottom of the shell 1 and the permanent magnet 3, and the magnetic conductive electric core 4 and the shell 1 are integrally molded by injection; the upper end of the permanent magnet 3 is provided with a first soldering lug 6 fixedly connected with the framework 5; the lower end of the framework 5 is provided with a limiting groove, and a coil 7 is arranged in the limiting groove; the cavity inside the shell 1 is filled with pouring sealant.

The bottom of the framework 5 is clamped with the shell 1.

The coil 7 is connected to the first pad 6 by a wire, and the first pad 6 is connected to the second pad 8 by a wire.

In this embodiment, through set up cable 9 in skeleton 5 and the flange cavity of encapsulating between 2, can effectively reduce the production process of moulding plastics to the damage of cable 9, rethread first soldering lug 6 and second soldering lug 8 set up the wire and connect, reduce the damage to the wire, the spacing groove design, permanent magnet 3 has guaranteed permanent magnet 3 with the integrative injection moulding's of skeleton 5 design and magnetic conduction electricity core 4 and the integrative injection moulding of casing 1, the relative position of magnetic conduction electricity core 4 and coil, the accuracy of sensor has been guaranteed.

Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the following claims. Moreover, the utility model as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.

Claims

1. The crankshaft position sensor is characterized by comprising a shell, a flange package and a framework, wherein the flange package is installed at the upper end of the shell, and a wire hole is formed in the top end of the flange package; the framework is inserted into the opening of the shell; a cavity is formed between the framework and the flange package; and a second soldering lug is mounted at the top end of the framework, a cable is welded on the second soldering lug and penetrates through the wire hole to be connected with an external circuit.

2. A crankshaft position sensor according to claim 1, wherein the sensor further comprises: the permanent magnet and the framework are integrally molded by injection; the magnetic conductive electric core is positioned between the bottom of the shell and the permanent magnet and is integrally injection-molded with the shell; the upper end of the permanent magnet is provided with a first soldering lug fixedly connected with the framework; the lower end of the framework is provided with a limiting groove, and a coil is arranged in the limiting groove; the cavity inside the shell is filled with pouring sealant.

3. A crankshaft position sensor according to claim 2, wherein the bottom of the frame is snap-fitted to the housing.

4. A crankshaft position sensor according to claim 3, wherein the coil is connected to the first bonding pad by a wire, and the first bonding pad is connected to the second bonding pad by a wire.