CN202188930U

CN202188930U - Novel electric steering torque device

Info

Publication number: CN202188930U
Application number: CN2011202762463U
Authority: CN
Inventors: 刘伟伟; 胡永林; 沈阳
Original assignee: UNIVERSAL DRIVING SHAFT CO Ltd HANZHOU CITY; Wanxiang Group Corp
Current assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Priority date: 2011-08-01
Filing date: 2011-08-01
Publication date: 2012-04-11
Anticipated expiration: 2021-08-01

Abstract

The utility model relates to a novel electric steering torque device, comprising an input shaft and an output shaft; wherein, the input shaft and output shaft are respectively fixed at the two ends of a torsion bar via a pin I and pin II. A radial magnetizing multipole permanent magnet ring cooperated with the torsion bar, a set magnetic ring forming a magnetic circuit and configurated in the magnetic field of the multipole permanent magnet ring and a detection part for detecting the magnetic flux sensed by the set magnetic ring are also arranged in the novel electric steering torque device. The novel electric steering torque device is good in water-resistance, small in volume, stable in work and firm in mounting, and can be widely used in the fields, such as automotive electronics, industrial control, etc.

Description

A kind of electric steering torque device

Technical field

The utility model relates to a kind of automobile steering system, especially a kind of electric steering torque device.

Background technology

Along with the development of automotive engineering, people pursue safe, light, comfortable driving environment gradually, and automobile steering system is developed to power steering system by common steering.Power steering gear divides pneumatic/hydraulic power-assisted steering and electric power steering, advantage such as light, simple, energy-conservation, the cleaning of electric power-assisted steering apparatus (EPS) wherein, extremely people's favor has the trend of other power-assisted modes of replacement gradually.And also receive people's attention day by day as the torque sensor of one of electric power steering gordian technique.The effect of torque sensor is the relative moment of torsion of measuring between steering wheel and the steering gear, with as one of electric boosted foundation.Torque sensor claimed structure in the EPS system is simple, reliable operation, low price, moderate accuracy.

Domestic existing torque sensor detection part is as shown in Figure 5.It is divided into three parts with detection part, end cap I16, sensor outside circle 17, end cap II18.Sensor outside circle 17 is synthetic resin moldings.During assembling, earlier circle 17 interference of the sensor outside are pressed into end cap I16, wherein sensor outside circle 17 is coaxial with end cap I16.Then end cap I16 and end cap II18 are assembled together through bolt is coaxial.

But shown torque sensor detection part owing to be divided into three parts, has increased the processing and the assembly process of part in process of production.Owing to will guarantee the right alignment of three parts simultaneously, increase mechanical processing difficulty simultaneously, increased cost.

The torque sensor detection part also needs certain water proofing property simultaneously.Also need increase a sealing gasket together the time through bolts assemblies at end cap I16 and end cap II18.When circle 17 is pressed into end cap I16 in the sensor outside, need the signal wire on the sensor outside circle 17 be drawn out to outside the end cap I16 through hole 19, the signal wire here also need be done encapsulation process through hole 19.

Summary of the invention

The utility model will solve the shortcoming of above-mentioned prior art, provides that a kind of good waterproof performance, volume are little, working stability, the firm electric steering torque device of installation.

The utility model solves the technical scheme that its technical matters adopts: this electric steering torque device; Comprise input shaft, output shaft; Input shaft and output shaft are fixed through pin I and pin II and torsion bar two ends respectively, also are provided with the detection part of the magnetic flux of the multipole permanent magnet ring of the radial magnetizing that cooperates with torsion bar, the collection magnetosphere that is configured in the formation magnetic circuit in the multipole permanent magnet ring magnetic field, the induction of detected set magnetosphere in the device.

As preferably, said detection part comprises by detecting circle a, detecting the detection circle group of circle b, articles injection-moulded integrated through injection molding, detects in the cavity that circle is mounted on metal shell and integrated through injection molding with it, the pcb board that connects Hall chip is housed on articles injection-moulded.

As preferably, be provided with fluid sealant in the cavity.

The effect that utility model is useful is: one, detection part is fixed into one through injection moulding or other modes with housing; Solved waterproof problem; And make parts more firm, axial symmetry of also having avoided causing because of individual difference in two component-assembled processes and radial symmetry do not conform to caused error; Two, detection part is fixed into one through injection moulding or other modes with housing, can reduce the volume of whole sensor, is suitable for the compact dolly more; Three, in addition, the electronic unit of detection part fixes through encapsulating, can be good at guaranteeing electric property, improves job stability.

Description of drawings

Fig. 1 is the sectional view of the utility model;

Fig. 2 is the sectional view of detection part;

Fig. 3 is the structural representation that detects the circle group;

Fig. 4 is the assembling synoptic diagram that detects circle group and metal shell;

Fig. 5 is domestic existing sensor parts three-dimensional exploded view;

Description of reference numerals: detect circle a1, detect circle b2, articles injection-moulded 3, metal shell 4, pcb board 5; Hall chip 6, input shaft 7, output shaft 8, pin I9, pin II10; Torsion bar 11, cavity 12, detection part 13, multipole permanent magnet ring 14, collection magnetosphere 15; End cap I16, sensor outside circle 17, end cap II18, signal wire is through hole 19.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

Embodiment: like Fig. 1; This electric steering torque device; Comprise input shaft 7, output shaft 8; Input shaft 7 is fixed through pin I9 and pin II10 and torsion bar 11 two ends respectively with output shaft 8, also is provided with the detection part 13 of the magnetic flux that the multipole permanent magnet ring 14 of the radial magnetizing that cooperates with torsion bar 11, the collection magnetosphere 15 that is configured in the formation magnetic circuit in multipole permanent magnet ring 14 magnetic fields, detected set magnetosphere 15 respond in the device.

Here specify: at first, the detection circle group in the detection part 13, promptly shown in Figure 3, to do individual pre-fixing here, enclose b2 to detection circle a1 with detection and be integral through synthetic resin and articles injection-moulded 2 injection moldings according to designing requirement.Then, will detect the circle group and put into metal shell 4, as shown in Figure 4, carry out injection moulding by designing requirement after waiting to have fixed, will detect the circle group and metal shell 4 is injection molded into one.Then, on articles injection-moulded, install pcb board 5 and the Hall chip 6 that Hall chip 6 belongs to, again cavity 12 is filled with fluid sealant, as shown in Figure 2.

The torque sensor principle of work: collection magnetosphere 15 is configured in the magnetic field of multipole permanent magnet ring 14; When producing moment of torsion between input shaft 7 and the output shaft 8, torsion bar 11 deforms, and the phase place between collection magnetosphere 15 and the multipole permanent magnet ring 14 just changes; The magnetic flux of magnetic loop just changes; The variation of this magnetic flux is discerned by Hall chip 6, and Hall chip 6 converts magnetic signal into corresponding electric signal output, has so just realized the detection of moment of torsion.

Except that the foregoing description, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims

1. electric steering torque device; Comprise input shaft (7), output shaft (8); It is characterized in that: input shaft (7) and output shaft (8) are fixed with torsion bar (11) two ends through pin I (9) and pin II (10) respectively, also are provided with the detection part (13) of the magnetic flux of the multipole permanent magnet ring (14) of the radial magnetizing that cooperates with torsion bar (11), the collection magnetosphere (15) that is configured in the formation magnetic circuit in multipole permanent magnet ring (14) magnetic field, detected set magnetosphere (15) induction in the device.

2. electric steering torque device according to claim 1; It is characterized in that: said detection part (13) comprises by detecting circle a (1), detecting the detection circle group of enclosing b (2), articles injection-moulded (3) integrated through injection molding; Detect in the cavity (12) that circle is mounted on metal shell (4) and integrated through injection molding with it, the pcb board (5) that connects Hall chip (6) is housed on articles injection-moulded (3).

3. electric steering torque device according to claim 2 is characterized in that: cavity is provided with fluid sealant in (12).