KR20180011627A - Torque sensor, torque angle sensor and steering apparatus having the same - Google Patents

Abstract

The present invention provides a torque sensor including: a rotor; a stator disposed outside the rotor; a sensing portion for measuring a magnetic field generated between the rotor and the stator; and a housing for accommodating the rotor and the stator, wherein the housing includes a fixing portion protruding from the outer circumferential surface thereof. The fixing portion includes: a contact portion coming in contact with an external fixed material; and an elastic portion for elastically connecting the housing and the contact portion. Accordingly, the present invention secures fluidity while securing a coupling performance between a sensor module and a column housing.

Description

TECHNICAL FIELD [0001] The present invention relates to a torque sensor, a torque angle sensor, and a steering apparatus including the torque sensor,

Embodiments relate to a torque sensor, a torque angle sensor and a steering apparatus including the same.

Generally, the automobile operates the steering wheel by operating the steering wheel connected to the wheel. However, when the resistance between the wheels and the road surface is large, or the obstacle of the steering is generated, the operation force is weakened and the operation is difficult. In order to solve this problem, a power steering system (EPS) is used. Such a power steering device is a device for interrupting the operation force of the steering wheel through a power device.

This power steering system (EPS) drives a motor in an electronic control unit according to operating conditions sensed by a vehicle speed sensor, a torque angle sensor and a torque sensor to ensure swing stability and provide quick restoring force, Thereby enabling safe driving.

The torque angle sensor can be divided into a torque sensing module and an angle (steering angle) sensing module as a function. These sensing modules are included inside the housing. The housing including the sensing module is installed inside the column housing. At this time, the housing is fixed so as not to rotate inside the color housing. The outer circumferential surface of the housing and the inner wall of the column housing may be provided with a fixing structure for mutual coupling. However, in order to secure the stability of a general fixed structure, So as to completely constrain the flow of the housing.

But. When the housing is completely restrained by the column housing, the assemblability of the housing and the column housing deteriorates greatly, and the sensor performance is deteriorated due to the vibration.

Accordingly, it is an object of the present invention to provide a torque sensor, a torque angle sensor, and a steering device including the sensor module and the column housing, which ensure fluidity while securing the coupling between the sensor module and the column housing.

The problems to be solved by the embodiments are not limited to the above-mentioned problems, and other problems not mentioned here can be clearly understood by those skilled in the art from the following description.

An embodiment of the present invention is directed to a stator comprising: a rotor; a stator disposed outside the rotor; a sensing unit for measuring a magnetic field generated between the rotor and the stator; and a housing for housing the rotor and the stator, And the fixing portion may provide a torque sensor including a contact portion contacting the external fixture and an elastic portion elastically connecting the housing and the contact portion.

Preferably, the pair of fixing portions may protrude so as to face each other on the outer peripheral surface of the housing.

Preferably, the elastic portion may include a curved surface.

Preferably, the contact portion may comprise a plane.

Preferably, the first distance, which is the shortest distance between the contact portions of the pair of fixing portions, may be smaller than the thickness of the external fixture.

Preferably, the contact portions of the pair of fixing portions may be arranged to face each other.

Preferably, the fixing portion may include a stopper extending from an end of the contact portion.

Preferably, the stopper may extend toward the elastic portion.

Preferably, the contact portion includes an upper inclined surface and a lower inclined surface,

The upper inclined surface may be inclined from the plane to the upper end surface of the contact portion, and the lower inclined surface may be inclined from the plane to the lower end surface of the contact portion.

Preferably, the contact portion is in line contact with the external fixture.

An embodiment of the present invention is directed to a stator comprising: a rotor; a stator disposed outside the rotor; a sensing unit for measuring a magnetic field generated between the rotor and the stator; and a housing for housing the rotor and the stator, And the fixing portion may provide a torque angle sensor including a torque sensor including a contact portion contacting the external fixture and an elastic portion elastically connecting the housing and the contact portion.

Preferably, as the torque angle sensor, the contact portion is in line contact with the external fixture.

Preferably, as the torque angle sensor, a pair of the fixing portions may protrude so as to face each other on the outer peripheral surface of the housing.

Preferably, as the torque angle sensor, the elastic portion may include a curved surface.

Preferably, as the torque angle sensor, the contact portion may include a plane.

Preferably, as the torque angle sensor, the first distance, which is the shortest distance between the contact portions of the pair of fixing portions, may be formed smaller than the thickness of the external fixture.

Preferably, as the torque angle sensor, the contact portions of the pair of the fixed portions may be arranged to face each other.

Preferably, in the torque angle sensor, the fixing portion may include a stopper extending from an end of the contact portion.

Preferably, as the torque angle sensor, the stopper may extend toward the elastic portion.

Preferably, in the torque angle sensor, each of the contact portions includes an upper inclined surface and a lower inclined surface, and the upper inclined surface is formed to be inclined from the upper surface to the upper surface of the contact portion in the plane, It may be formed inclined to the surface.

An embodiment of the present invention is directed to a stator comprising: a rotor; a stator disposed outside the rotor; a sensing unit for measuring a magnetic field generated between the rotor and the stator; and a housing for housing the rotor and the stator, And the fixing portion may provide a steering device including a torque sensor including a contact portion contacting the external fixture and an elastic portion elastically connecting the housing and the contact portion.

Preferably, as the steering device, the contact portion may be in line contact with the external fixture.

Preferably, as the steering apparatus, a pair of the fixed portions may protrude so as to face each other on the outer peripheral surface of the housing.

Preferably, as the steering device, the elastic portion may include a curved surface.

Preferably, as a steering device, the contact portion may include a plane.

Preferably, in the steering apparatus, the first distance, which is the shortest distance between the contact portions of the pair of fixing portions, may be formed smaller than the thickness of the external fixture.

Preferably, as the steering apparatus, the contact portions of the pair of the fixed portions may be arranged to face each other.

Preferably, as the steering device, the fixing portion may include a stopper extending from an end of the contact portion.

Preferably, as a steering device, the stopper may extend toward the elastic portion.

Preferably, in the steering device, the contact portions each include an upper inclined surface and a lower inclined surface,

Preferably, the upper inclined surface is inclined from the plane to the upper end surface of the contact portion, and the lower inclined surface is inclined from the plane to the lower end surface of the contact portion.

Preferably, the steering apparatus further includes a column housing including a fixed rib, and the torque sensor may be disposed inside the column housing.

Preferably, as the steering device, the contact portion may contact the fixed rib.

Preferably, as a steering device, the fixed rib may include a curved surface that contacts the contact portion.

Preferably, in the steering apparatus, the fixed rib includes a first rib and a second rib, and a space may be formed between the first rib and the second rib.

An embodiment of the present invention is directed to a stator comprising: a rotor; a stator disposed outside the rotor; a sensing unit for measuring a magnetic field generated between the rotor and the stator; and a housing for housing the rotor and the stator, Wherein the fixing portion includes a torque sensor including a torque sensor including a contact portion contacting the external fixture and an elastic portion elastically connecting the housing and the contact portion, .

Preferably, as the steering device, the contact portion may be in line contact with the external fixture.

Preferably, as the steering apparatus, a pair of the fixed portions may protrude so as to face each other on the outer peripheral surface of the housing.

Preferably, as the steering device, the elastic portion may include a curved surface.

Preferably, as a steering device, the contact portion may include a plane.

Preferably, in the steering apparatus, the first distance, which is the shortest distance between the contact portions of the pair of fixing portions, may be formed smaller than the thickness of the external fixture.

Preferably, as the steering apparatus, the contact portions of the pair of the fixed portions may be arranged to face each other.

Preferably, as the steering device, the fixing portion may include a stopper extending from an end of the contact portion.

Preferably, as a steering device, the stopper may extend toward the elastic portion.

Preferably, in the steering device, the contact portions each include an upper inclined surface and a lower inclined surface, the upper inclined surface is formed to be inclined from the plane to the upper surface of the contact portion, and the lower inclined surface, As shown in Fig.

According to an embodiment of the present invention, there is provided a fixing unit including a plane which is in line contact with a fixing rib of a column housing, thereby providing an advantageous effect of securing fluidity while securing the coupling between the sensor module and the column housing.

1 is a view showing a torque angle sensor according to an embodiment,
FIG. 2 is an exploded view of the torque angle sensor shown in FIG. 1,
3 is a view showing a fixing portion of the housing,
4 is a view showing a fixing rib of the column housing,
Fig. 5 is a side view of the housing, showing a fixing part engaged with the fixing rib of the column housing,
6 is a view showing a state of engagement between the fixed rib and the fixing portion,
7 is a view showing a state of engagement between the fixed rib and the fixing portion,
8 is a front view of the fixing portion.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary terms and the inventor should properly define the concept of the term in order to describe its own invention in the best way. The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

FIG. 1 is a view showing a torque angle sensor according to an embodiment, and FIG. 2 is an exploded view of the torque angle sensor shown in FIG. 1. FIG.

Referring to FIGS. 1 and 2 together, the torque angle sensor according to the embodiment may include a housing 100 and a torque sensor module 200 and an angle sensor module 300.

The housing 100 may include an upper housing 100A and a lower housing 100B. And can be accommodated in the angle sensor module 200 and the torque sensor module 300 between the upper housing 100A and the lower housing 100B.

Either the first axis or the second axis defined in the embodiment may be an input shaft connected to the steering wheel of the vehicle, and the other may be an output shaft connected to the wheels of the vehicle.

The torque sensor module 200 detects a magnetic field generated in accordance with the twist between the first axis and the second axis.

The torque sensor module 200 may include a rotor 210 connected to the first shaft and a stator 220 connected to the second shaft. The rotor 210 has a rotor core coupled to the first shaft, and a magnet can be attached to the outer circumferential surface of the rotor core. The rotor 210 may be rotatably disposed inside the stator 220. The stator 220 can be arranged in a manner that two statorings face each other, and two statorings can be accommodated in the holder. Also. The torque sensor module 200 may include a magnetic element for measuring a magnetic field generated between the rotor 210 and the stator 220 and a collector for collecting a magnetic field.

The angle sensor module 300 may include a main gear 310 rotating in conjunction with a first axis or a second axis and two sub gears 320 gearing with the main gear 310. The main gear 310 can be rotated integrally with the second shaft. The sub gear 320 is rotated in accordance with the rotation of the main gear 310. At this time, a magnet may be mounted on the two sub gears 320. The printed circuit board may be provided with elements capable of measuring a magnetic field generated by the rotation of a magnet mounted on the sub gear. These elements may be any one of a magnetic resistance element (AMRIC) and a Hall element have.

FIG. 3 is a view showing a fixing portion of the housing. FIG.

Referring to FIG. 3, the housing 100 may have a center hole A for inserting the first shaft and the second shaft. The fixing part 110 may protrude from the outer circumferential surface of the housing 100. The fixing portion 110 is a structure for coupling with the column housing.

4 is a view showing a fixing rib of the column housing.

3 and 4, the column housing 20 may have a fixing rib 21 formed thereon. The fixing ribs 21 are fitted into the fixing portions 110.

A pair of fixing portions 110 (111, 112) may be formed on the outer peripheral surface of the housing 100, respectively. A space for accommodating the fixing ribs 21 is formed between the pair of fixing portions 110 (111, 111, 112). The fixing portion 110 is formed to be elastically deformable corresponding to an external force.

FIG. 5 is a side view of the housing, showing a fixing part engaged with a fixing rib of the column housing, and FIG. 6 is a view showing a fixing state of the fixing rib and the fixing part.

5 and 6, by inserting the fixing ribs 21 into the receiving space between the pair of fixing portions 110: 111 and 112, The housing 100 can be fixed to the column housing 20 (Fig. 4). At this time, the shortest distance d of the pair of fixing portions 110: 111, 112 may be formed to be smaller than the thickness of the fixed rib 21 (W in FIG. 5).

Fig. 7 is a view showing a state of engagement between the fixed rib and the fixing portion, and Fig. 8 is a front view of the fixing portion.

Referring to FIGS. 7 and 8, the fixing portions 110: 111 and 112 may include elastic portions 111a and 112a and contact portions 111b and 112b. The contact portions 111b and 112b contact with the fixed rib 21 and the elastic portions 111a and 112a resiliently connect the housing 100 and the contact portions 111b and 112b. Stoppers 111c and 112c may be provided at the ends of the contact portions 111b and 112b.

Each of the fixing portions 110 (111, 112) may be formed by bending and bending a strip-like surface member having a predetermined thickness. That is, the elastic portions 111a and 112a, the contact portions 111b and 112b, and the stoppers 111c and 112c may be separately described according to their shapes and functional characteristics, and may be one means vertically connected to each other.

The elastic portions 111a and 112a protrude from the outer circumferential surface of the housing 100. The elastic portions 111a and 112a are coupled to the housing 100 in a cantilever shape to facilitate elastic deformation. The two elastic portions 111a and 112a are curvedly formed so as to collect the ends at opposite positions and include curved surfaces.

The contact portions 111b and 112b may be bent from the ends of the elastic portions 111a and 112a toward the housing 100 side. These contact portions 111b and 112b may include planes 111ba and 112ba that are in line contact with the fixed ribs 21.

The plane 111ba of one of the fixing portions 111 and the plane 112ba of the other fixing portion 112 are arranged to face each other.

At this time, the fixed rib 21 may be formed to include a curved surface in line contact with the flat surfaces 111ba and 112ba of the fixing portion 110. For example, the fixed rib 21 may be formed in a cylindrical shape.

The fixed rib 21 may be divided into a first rib 21a and a second rib 21b. A space is formed between the first rib 21a and the second rib 21b. The first rib 21a can be in contact with the plane 111ba of one of the fixing portions 111. [ And the second rib 21b can contact the plane 112ba of the other fixed portion 112. [ The first ribs 21a and the second ribs 21b may be semicylindrical in cross section.

A space is provided between the first rib 21a and the second rib 21b so that when the fixed rib 21 is inserted into the fixing portion 110, elastic deformation is easy. The restoring force of the first rib 21a and the second rib 21b increases the coupling force of the housing 100 to the column housing 20. [

On the other hand, the stoppers 111c and 112c can be bent toward the elastic portions 111a and 112a at the ends of the contact portions 111b and 112b. The stoppers 111c and 112c prevent the contact portions 111b and 112b from being excessively deformed.

7, when the fixing ribs 21 are inserted into the fixing portions 110, the fixing ribs 21 press the flat portions 111ba and 112ba of the fixing portion 110 while pressing the contacting portions 111b and 112b, . The contacted portions 111b and 112b press the fixed ribs 21 through the restoring force to secure the coupling force between the housing 100 and the column housing 20. [

Since the contact portions 111b and 112b are in line contact with the fixed ribs 21 and the resilient displacement sections of the contact portions 111b and 112b are large in the structure of the bent portion 110, (100) is fixed, it is possible to form not only a left-right flow but also an up-down flow of the housing (100). Therefore, the flow direction of the housing 100 has various advantages. The configuration of the fixing unit 110 is advantageous in that it can be readily absorbed by external vibration or shock transmitted to the housing 100.

Referring to FIG. 8, the contact portion 111b of one of the fixing portions 111 may include an upper inclined surface 111bb and a lower inclined surface 111bc. The upper inclined surface 111bb is formed to be inclined from the plane 111ba to the upper end surface of the contact portion 111b. The lower inclined surface 111bc is formed to be inclined from the plane 111ba to the lower end surface of the contact portion 111b.

The contact portion 112b of the other fixing portion 112 may include an upper inclined surface 112bb and a lower inclined surface 112bc. The upper inclined surface 112bb is inclined from the plane 112ba to the upper surface of the contact portion 112b. The lower inclined surface 112bc is formed to be inclined from the plane 112ba to the lower end surface of the contact portion 112b.

The upper inclined surfaces 111bb and 112bb and the lower inclined surfaces 111bc and 112bc extend the entrance where the fixed ribs 21 are inserted when the fixed ribs 21 are inserted from the upper portion or the lower portion of the fixed portion 110, So that the fixing rib 21 can be inserted more smoothly into the accommodation space.

The housing (100) is very well assembled with the column housing (20). There is an advantage in that the assembly is advantageous even if the alignment of the fixing ribs 21 formed on the column housing 20 and the fixing portions 110 of the housing 100 is not precise.

It will be apparent to those skilled in the art that various modifications, changes, and substitutions are possible, without departing from the essential characteristics and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

20: Column housing
21: Fixed rib
21a: first rib
21b:
100: Housing
110:
111a, 112a:
111b, 112b:
111ba, 112ba: flat
111c, 112c: Stopper
200: Angle sensor module
210: Rotor
220:
300: Torque sensor module
310: main gear
320: sub gear

Claims (17)

Rotor;
A stator disposed outside the rotor;
A sensing unit for measuring a magnetic field generated between the rotor and the stator; And
A housing for receiving the rotor and the stator,
The housing includes a fixing portion protruding from an outer circumferential surface,
The fixing portion includes a contact portion
And a resilient portion elastically connecting the housing and the contact portion. The method according to claim 1,
And the pair of the fixing portions protrude so as to face each other on the outer peripheral surface of the housing. 3. The method of claim 2,
Wherein the elastic portion comprises a curved surface. 3. The method of claim 2,
Wherein the contact portion includes a plane. 3. The method of claim 2,
Wherein the first distance, which is the shortest distance between the contact portions of the pair of fixing portions, is smaller than the thickness of the external fixing member. 6. The method of claim 5,
Wherein the contact portions of the pair of fixing portions are arranged to face each other. The method according to claim 1,
And the fixing portion includes a stopper extending from an end of the contact portion. 8. The method of claim 7,
And the stopper extends toward the elastic portion. The method according to claim 1,
Wherein the contact portion includes an upper inclined surface and a lower inclined surface,
Wherein the upper inclined surface is inclined from the plane to an upper end surface of the contact portion,
Wherein the lower inclined surface is inclined from the plane to the lower end surface of the contact portion. The method according to claim 1,
And the contact portion is in line contact with the external fixture. A torque angle sensor comprising the torque sensor according to any one of claims 1 to 10. A steering apparatus comprising the torque sensor according to any one of claims 1 to 10. 13. The method of claim 12,
Further comprising a column housing including a stationary rib,
Wherein the torque sensor is disposed within the column housing. 14. The method of claim 13,
And the contact portion contacts the fixed rib. 15. The method of claim 14,
Wherein the fixed rib includes a curved surface in contact with the contact portion. 16. The method of claim 15,
Wherein the fixed rib includes a first rib and a second rib,
And a space is formed between the first rib and the second rib. A steering apparatus comprising the torque angle sensor of claim 11.

Images