CN203323935U

CN203323935U - Magnetic ring assembly for non-contact hall type torque sensor

Info

Publication number: CN203323935U
Application number: CN201320409014XU
Authority: CN
Inventors: 周龙龙; 蔡黎明; 王朝久; 周珑
Original assignee: HANGZHOU XINSHIBAO ELECTRIC STEERING SYSTEM Co Ltd
Current assignee: HANGZHOU XINSHIBAO ELECTRIC STEERING SYSTEM Co Ltd
Priority date: 2013-07-10
Filing date: 2013-07-10
Publication date: 2013-12-04
Anticipated expiration: 2023-07-10

Abstract

The utility model discloses a magnetic ring assembly for a non-contact hall type torque sensor. The magnetic ring assembly comprises upper and lower magnetic rings (1) and a bushing (2), wherein the magnetic rings (1) and the bushing (2) are composited through an injection molding process. The magnetic ring (1) comprises a ring body (3) and a plurality of teeth (4) which are arranged in the direction perpendicular to the ring body (3) from the inner ring end part of the ring body (3), wherein the teeth (4) are identical in size and arranged at equal intervals, and the ring body (3) is an integral plane. A magnetic channel of the magnetic ring assembly for the non-contact hall type torque sensor is not disconnected or blocked, thereby being smooth in channel; and a magnetic field is uniform in distribution, thereby improving the consistency and the reliability of the sensor, and increasing the accuracy in signal transmission of the sensor greatly.

Description

Magnetic guiding loop assembly for noncontact hall formula torque sensor

Technical field

The utility model relates to a kind of magnetic guiding loop assembly for noncontact hall formula torque sensor.

Background technology

Electric power steering (EPS) comprises substantially: steering mechanism, torque sensor, controller (ECU).Torque sensor is as the neuron of EPS system, the perception driver is applied to the moment of torsion on bearing circle, it is one of EPS key components and parts, both at home and abroad the performance boost of noncontact hall formula torque sensor never stopped, the corresponding closely-related magnetic guiding loop assembly of the performance magnetic conduction effect requirements with sensor is more and more higher.Japan Jie Taigete company adopts 12 pairs of pole tip tooth magnetic conduction constructions, increases the linearity of magnetic signal intensity and sensor output signal, but has the pilot hole of resistance magnetic on the magnetic conduction loop, affects magnetic signal stability; Korea S large star company adopts center section to increase magnetic shielding, and the outside magnetic conduction construction with not bending guarantees the effect of adopting flux path, increases the intensity in sensor signal source, but its assembly technology is comparatively complicated; U.S. Bourns, Inc. adopts 8 pairs of polar moment shape magnetic conduction constructions to increase the magnetism guiding access area, improves the reliability of signal source, but derives the magnetic signal low strength.

For the magnetic guiding loop assembly in noncontact hall formula torque sensor, existing magnetic guiding loop assembly manufacture method is by injection mo(u)lding, wherein the locator meams of magnetic guiding loop assembly is by lower membrane module, being provided with guide pillar, be provided with pilot hole and realize the location of lower magnetic guiding loop on magnetic guiding loop, there is following defect in the corresponding magnetic guiding loop assembly that is provided with pilot hole on magnetic guiding loop: be provided with pilot hole on magnetic guiding loop, hindered the magnetism guiding access on the magnetic guiding loop, make Distribution of Magnetic Field inhomogeneous, affected the effect of magnetic field induction; And, at the pilot hole place, physical strength is also lower, micro-distortion that can produce while being subject to effect of stress herein, will cause magnetic circuit to open circuit, affect the effect of magnetic field induction, thereby reduced consistance and the reliability of sensor, greatly reduced the accuracy of sensor passes signal.

Summary of the invention

The utility model, for deficiency of the prior art, provides a kind of magnetism guiding access do not open circuit and hinder, and path is smooth and easy, and Distribution of Magnetic Field is uniformly for the magnetic guiding loop assembly of noncontact hall formula torque sensor.

In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:

A kind of magnetic guiding loop assembly for noncontact hall formula torque sensor, described magnetic guiding loop assembly comprises upper and lower two magnetic guiding loops and lining, magnetic guiding loop and lining synthesize by Shooting Technique, described magnetic guiding loop comprises that ring bodies is provided with some teeth with the vertical ring bodies direction in interior ring end from ring bodies, spacing between the identical and adjacent teeth of described tooth size equates, the as a whole plane of described ring bodies.

Further, described upper and lower two magnetic guiding loops be placed as the relative interlock of tooth and between cog gapped, and equate along magnetic guiding loop circumferencial direction inter-lobe clearance, interdental space equates.

Further, the interior ring end of the relatively described ring bodies of described tooth is for seamlessly transitting.

The utility model is obtained following beneficial effect: described magnetic guiding loop assembly by being provided with the location that the countervane matched with tooth on magnetic guiding loop is realized lower magnetic guiding loop on lower membrane module, therefore the described ring bodies of magnetic guiding loop is set to an integral planar, the magnetic conduction construction magnetism guiding access does not open circuit and hinders, path is smooth and easy, Distribution of Magnetic Field is even, improve consistance and the reliability of sensor, thereby greatly increased the accuracy of sensor passes signal; Further, improved described magnetic guiding loop physical strength, and Sheet Metal Forming Technology is simple, has reduced production cost.

The accompanying drawing explanation

The structural representation that Fig. 1 is a kind of magnetic guiding loop assembly embodiment for noncontact hall formula torque sensor of the utility model;

The structural representation that Fig. 2 is the utility model magnetic guiding loop.

Embodiment

As shown in Figure 1, a kind of embodiment of the magnetic guiding loop assembly for noncontact hall formula torque sensor, described magnetic guiding loop assembly comprises upper and lower two magnetic guiding loops 1 and lining 2, magnetic guiding loop 1 and lining 2 synthesize by Shooting Technique, described magnetic guiding loop 1 comprises that ring bodies 3 is provided with some teeth 4 with vertical ring bodies 3 directions in the interior ring end from ring bodies 3, spacing between the identical and adjacent teeth 4 of described tooth 4 sizes equates, the as a whole plane of described ring bodies 3.

Further, described upper and lower two magnetic guiding loops 1 be placed as the relative interlock of tooth 4 and between cog gapped, and equate along magnetic guiding loop 1 circumferencial direction inter-lobe clearance, interdental space equates.

Preferably, the interior ring end of the relatively described ring bodies 3 of described tooth 4 is for seamlessly transitting.

Described magnetic guiding loop assembly by being provided with the location that the countervane matched with tooth on magnetic guiding loop is realized lower magnetic guiding loop on lower membrane module, therefore the described ring bodies of magnetic guiding loop is set to an integral planar, the magnetic conduction construction magnetism guiding access does not open circuit and hinders, path is smooth and easy, Distribution of Magnetic Field is even, improve consistance and the reliability of sensor, thereby greatly increased the accuracy of sensor passes signal; Further, improved described magnetic guiding loop physical strength, and Sheet Metal Forming Technology is simple, has reduced production cost.

In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.

Claims

1. the magnetic guiding loop assembly for noncontact hall formula torque sensor, described magnetic guiding loop assembly comprises upper and lower two magnetic guiding loops (1) and lining (2), magnetic guiding loop (1) and lining (2) synthesize by Shooting Technique, it is characterized in that: described magnetic guiding loop (1) comprises that ring bodies (3) is provided with some teeth (4) with the vertical ring bodies in interior ring end (3) direction from ring bodies (3), spacing between the identical and adjacent teeth (4) of described tooth (4) size equates, the as a whole plane of described ring bodies (3).

2. according to the described magnetic guiding loop assembly for noncontact hall formula torque sensor of claim 1, it is characterized in that: described upper and lower two magnetic guiding loops (1) be placed as tooth (4) relatively interlock and between cog gapped, and along magnetic guiding loop (1) circumferencial direction inter-lobe clearance, equate, interdental space equates.

3. the magnetic guiding loop assembly for noncontact hall formula torque sensor according to claim 1, it is characterized in that: the interior ring end of the relatively described ring bodies of described tooth (4) (3) is for seamlessly transitting.