KR101585337B1 - Torque sensor unit - Google Patents

Abstract

The present invention relates to a torque sensor device disposed between an input shaft and an output shaft and sensing a torque between an input shaft and an output shaft through relative rotational displacement between an input shaft and an output shaft, A magnet unit accommodated in the housing and connected to one end of an input shaft and an output shaft, the magnet unit including a magnet ring rotatably accommodated in the housing; A collector unit fixed to the housing and disposed outside the magnet unit to focus a magnetic field of the magnet unit; A sensing unit disposed on an outer circumferential side of the collector unit and including a torque sensor for sensing a magnetic field focused through the collector unit; A shield which is disposed between the collector unit and the magnet unit and is connected to one end of the other of the input shaft and the output shaft to change the magnetic field of the magnet unit through the collector unit by relative rotation between the input shaft and the output shaft, Wherein the housing cover includes: a housing cover disposed on an input shaft side; and a housing base disposed on an output shaft side facing the housing cover, wherein an end portion of the housing cover contacting the housing base is inclined And a slope guide portion is provided in the torque sensor device.

Description

TORQUE SENSOR UNIT

The present invention relates to a torque sensor, and more particularly, to a torque sensor for sensing an applied torque to a shaft having an input shaft and an output shaft.

Generally, as the steering steering wheel is rotated when the vehicle is running or stopped, the wheel in contact with the road surface also rotates. That is, when the steering wheel is rotated leftward or rightward, the wheel rotates in the same direction. Since the wheel is in contact with the road surface, the steering ratio between the steering steering wheel and the wheel is different from each other due to the friction between the wheel and the road surface, so that the driver needs a large force to operate the steering steering wheel. .

A power steering system (PS) is provided as a device for assisting the steering force, and an EPS system using an electric motor among power steering systems is expanding its application range in passenger vehicles used in real life.

In order to assist the power assist in such a power steering system, a torque sensor for measuring the rotational angle deviation between the input shaft side connected to the steering steering wheel and the output shaft side interlocked with the wheel side Respectively.

The torque sensor is largely classified into a contact type and a non-contact type. Recently, a non-contact type torque sensor is adopted as a contact type due to a problem of reduction in noise and durability. The non-contact type torque sensor is classified into a magnetoresistance detection method, a magnetostriction detection method, a capacitance detection method, and an optical detection method.

On the other hand, in the conventional torque sensor of the magnetic resistance detection system provided in the electric power steering apparatus, the steering steering wheel to be operated by the driver is coupled to the upper end of the input shaft, and the lower end of the input shaft is connected to a torsion bar bar to the top of the output shaft. The lower end of the output shaft is connected to a wheel, and the lower end of the input shaft including the torsion bar and the upper end of the output shaft are protected by a housing on the outside thereof. In addition, the above-mentioned torque sensor and power means are installed inside the housing. Here, the input shaft is provided with a permanent magnet having a polarity crossing at a constant interval. A detection ring of the gear structure corresponding to the number of poles of the permanent magnet is provided on the output shaft as a ferromagnetic substance which can be magnetically induced by the permanent magnet provided on the input shaft. The detection ring is connected to a sensor for detecting magnetism. At this time, a change in the area corresponding to each other is caused by the relative torsion between the permanent magnet installed on the input shaft and the detection ring of the gear structure provided on the output shaft. Therefore, a change in the magnetic force is generated in the detection ring, and the sensor detects the change in the magnetic force, so that the output shaft senses the angle at which the twist occurs with respect to the input shaft.

However, the non-contact type torque sensor according to the related art has a problem that the malfunction is increased, the manufacturing cost is increased, and the durability problem due to the excessive component is exposed because the components are excessive and the assembly is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a torque sensor which can be manufactured with a simple structure, increases sensitivity, increases sensing reliability, and reduces manufacturing cost.

In order to achieve the above object, a torque sensor according to the present invention is disposed between an input shaft and an output shaft and detects a torque between an input shaft and an output shaft through a relative rotational displacement between an input shaft and an output shaft. And a housing rotatably supported by the housing so as to be rotatable with respect to the housing, the housing being accommodated in the housing and connected to one end of the input shaft and the output shaft, A magnet unit including a magnet ring to be magnetized; A collector unit fixed to the housing and disposed outside the magnet unit to focus a magnetic field of the magnet unit; A sensing unit disposed on an outer circumferential side of the collector unit and including a torque sensor for sensing a magnetic field focused through the collector unit; A shield which is disposed between the collector unit and the magnet unit and is connected to one end of the other of the input shaft and the output shaft to change the magnetic field of the magnet unit through the collector unit by relative rotation between the input shaft and the output shaft, Wherein the housing cover includes: a housing cover disposed on an input shaft side; and a housing base disposed on an output shaft side facing the housing cover, wherein an end portion of the housing cover contacting the housing base is inclined And a slope guide portion is provided in the torque sensor device.

In the torque sensor device, the inclined slope engaging portion may include: a cover guide disposed at an end of the housing cover; and a base guide disposed opposite to the cover guide at an end of the housing base, At least a portion of the base guide may have an inclined surface intersecting the radial direction line segment from the center of the housing.

In the torque sensor device, the cover guide and the base guide may be spaced apart from each other along the circumference of the housing cover and the housing base.

In the torque sensor device, the cover guide and the base guide are arranged in pairs so as to be opposed to each other so that at least two pairs of the cover guide and the base guide intersect each other from the center of the housing As shown in Fig.

The shield ring unit includes: a shield ring body disposed inside the collector unit and housing the magnet unit in a relatively rotatable manner; and a shield ring body disposed at a predetermined interval in the shield ring body, And a plurality of shield ring pieces spaced apart from the outer periphery of the body.

In the torque sensor device, a shield sleeve may be provided at one side of the shield ring body, and the shield sleeve may be connected to one end of the input shaft.

Wherein the shield sleeve includes: a sleeve shaft connected to one end of an input shaft; and a sleeve peripheral ferrule extending radially at an end of the sleeve shaft, wherein the sleeve ferrier ferrule has one or more sleeve ferries A ferrule groove may be formed.

In the torque sensor device, the shield body may include: a shield body rounder connected to the shield sleeve; and a shield body holder connected to the shield body rounder to enable the shield ring piece to be received and mounted.

In the torque sensor device, the shield body rounder is provided with a shield body rounder seating part for placing and disposing one end of the shield ring piece, the shield body holder is provided with a shield body holder ring piece opening, And a shield body holder ring piece seating part for seating and supporting the other end of the shield ring piece may be provided on the inner side of the ring piece through-hole.

Wherein the shield ring piece includes: a ring piece body disposed substantially perpendicular to a radial direction of the shield ring unit and disposed at the shield body holder ring piece seating portion; and a ring piece body disposed at an end portion of the ring piece body And a ring piece connecting portion extended and seated in the shield body rounder seating portion.

In the torque sensor device, a ring-piece connection portion is formed in the ring-piece connection portion, and a seating groove for receiving the ring-piece connection portion is provided on one surface of the shield-ring body holder ring- A mounting fused protrusion that can be inserted corresponding to the ring-piece connection mounting portion may be provided.

In the torque sensor device, the shield body holder ring piece seating portion may include: a ring piece seating aligning guide formed on an inner side of the shield body holder ring piece opening so as to be inclined in a dovetail structure toward the center side of the shield body holder, .

In the torque sensor device, a ring-piece guide is provided at an end of the shield ring piece, and an end portion of the shield body holder, which is physically perpendicular to the rotation shaft of the shield body holder, is engaged with the ring- It is also possible to provide a ring-piece seating stopper as far as possible.

In the torque sensor device, the shielding unit may include: a shield ring-over body which is fixed to the shield ring body and is fixed to the shield ring body in combination with the shield ring body.

In the torque sensor device, a shield sleeve is provided at one side of the shield ring body, the shield sleeve is connected to one end of an input shaft, the shield sleeve is injection-molded with the shield ring body, May be formed by overmolding the end portion of the shield ring body on which the shield ring piece is mounted.

The torque sensor device according to the present invention having the above-described configuration has the following effects.

First, the torque sensor device of the present invention is capable of securing impact resistance through the effect of pressure dispersion against an external shock through the structure including the housing and the inclined slope guide portion including the cover guide having the inclined slope structure and the base guide It is possible to provide a torque sensor device having a torque sensor.

Second, the torque sensor device of the present invention may provide even impact resistance to the entire circumference of the housing through the inclined slope guide portion having a plurality of cover guides and base guides.

Third, the torque sensor device of the present invention may improve the assemblability of the housing through the inclined slope guide portion having the plurality of cover guides and the base guide, and may provide a self-aligning structure to prevent the possibility of misassembly.

1 is a schematic exploded perspective view of a torque sensor according to an embodiment of the present invention.
2 is a schematic perspective view of a housing of a torque sensor according to an embodiment of the present invention.
FIGS. 3 and 4 are schematic partial enlarged views of the housing A and B of the torque sensor according to an embodiment of the present invention.
5 is a partial diagram showing a schematic external force corresponding state of a cover guide and a base guide of a housing of a torque sensor according to an embodiment of the present invention.
6 is a schematic partial partial state view of one type of cover guide and base guide of a torque sensor housing according to one embodiment of the present invention.
7 is a schematic exploded perspective view of a magnet unit of a torque sensor according to an embodiment of the present invention.
8 is a schematic side view of a magnet unit of a torque sensor according to an embodiment of the present invention.
9 is a schematic perspective view of a magnet holder shaft of a torque sensor according to an embodiment of the present invention.
10 is a schematic partial perspective view of a magnet ring of a torque sensor according to an embodiment of the present invention.
11 is a schematic partial cross-sectional view of a holder base body pit of a magnet holder base of a torque sensor according to an embodiment of the present invention.
12 is a schematic partial side cross-sectional view of a magnet ring of a torque sensor according to an embodiment of the present invention, in which the magnet holder is mounted.
13 is a partial plan view showing a magnet ring of a torque sensor and a schematic press pit state of a magnet holder according to an embodiment of the present invention.
14 is a partially enlarged plan view showing a magnet ring of a torque sensor and a schematic press fit state of a magnet holder according to an embodiment of the present invention.
15 is a partially enlarged side sectional view showing a magnet ring of a torque sensor and a schematic press pit state of a magnet holder according to an embodiment of the present invention.
FIGS. 16 and 17 are enlarged sectional side views of a magnet buffer of a torque sensor according to an embodiment of the present invention, showing a mounting state of a magnet buffer unit interposed between the magnet ring and the magnet cover. FIG.
18 is a perspective view of another example of a magnet buffer portion opened between a magnet ring and a magnet cover of a torque sensor according to an embodiment of the present invention.
19 is a schematic partial perspective view of a collector unit of a torque sensor according to an embodiment of the present invention.
20 is a schematic partial enlarged plan view of a collector unit of a torque sensor according to an embodiment of the present invention.
21 is a schematic partial enlarged side sectional view of a collector unit of a torque sensor according to an embodiment of the present invention.
22 is a schematic partial cross-sectional view of a modification of the collector holder of the collector unit of the torque sensor according to an embodiment of the present invention.
23 and 24 are partial cross-sectional views of a schematic calking process of a variation of the collector hold of the collector unit of the torque sensor according to an embodiment of the present invention.
25 is a schematic partial cross-sectional view of a modification of the collector holder of the collector unit of the torque sensor according to an embodiment of the present invention.
26 is a schematic partial perspective view of an angular sensor module of a sensing unit of a torque sensor according to an embodiment of the present invention.
27 is a schematic partial rear view of the rear side of an angular sensor module angular sensor holder of a sensing unit of a torque sensor according to an embodiment of the present invention.
28 is a schematic partial cross-sectional view of an angular sensor module angular rotor of a sensing unit of a torque sensor according to an embodiment of the present invention.
29 is a partially enlarged sectional view of an angular rotor of a torque sensor according to an embodiment of the present invention.
30 is a partially enlarged cross-sectional view of an angular rotor and an angular holder of a torque sensor according to an embodiment of the present invention.
31 is a schematic partially exploded perspective view of a shield ring unit of a torque sensor according to an embodiment of the present invention.
32 is a schematic perspective view of a shield sleeve of a torque sensor according to an embodiment of the present invention.
33 is a schematic perspective view of a shield ring body of a torque sensor according to an embodiment of the present invention.
34 is a schematic partial enlarged perspective view of a shield ring body of a torque sensor according to an embodiment of the present invention.
35 is a schematic partial enlarged perspective view of a modified example of the shield ring body of the torque sensor according to the embodiment of the present invention.
36 is a schematic perspective view of a shield ring piece of a torque sensor according to an embodiment of the present invention.
37 is a schematic perspective view showing an assembled state of a shield ring body and a shield ring piece of a torque sensor according to an embodiment of the present invention.
38 is a schematic perspective view of a shield ring over body of a torque sensor according to an embodiment of the present invention.
39 is a schematic perspective view of a shield ring unit of a torque sensor according to an embodiment of the present invention.
40 is a schematic perspective view showing an assembled state of the shield ring body and the shield ring piece of the torque sensor according to an embodiment of the present invention and a state before heat sealing.
41 is a partially enlarged perspective view of Fig.
42 is a schematic perspective view of a shield ring piece of a torque sensor according to an embodiment of the present invention.

Hereinafter, the configuration and operation of the torque sensor device 10 of the present invention will be described with reference to the accompanying drawings.

The torque sensor device 10 of the present invention includes a housing 100, a magnet unit 200, a collector unit 300, a sensing unit 400 and a shield ring unit 500, 10 is disposed between the input shaft 2 and the output shaft 3 and senses the torque between the input shaft 2 and the output shaft 3 through the relative rotational displacement of the input shaft 2 and the output shaft 3.

The housing 100 accommodates the end portions of the input shaft 2 and the output shaft 3 and is positionally fixed and movable relative to the input shaft 2 and the output shaft 3.

The magnet unit 200 includes a magnet ring 220 housed in the housing 100 and connected to one end of the input shaft 2 and accommodated in the housing 100 so as to be rotatable within the housing 100 .

The collector unit 300 is fixed to the housing 100 and disposed on the outer side of the magnet unit 200 to focus the magnetic field of the magnet unit 200.

The sensing unit 400 includes a torque sensor 410 disposed on the outer circumferential side of the collector unit 300 and sensing a magnetic field to be focused through the collector unit 300.

The shield ring unit 500 is disposed between the collector unit 300 and the magnet unit 200 and is connected to one end of the output shaft 3 so that the magnetic field of the magnet unit 200 converged through the collector unit 300 is And is changed by relative rotation between the input shaft 2 and the output shaft 3.

More specifically, the housing 100 includes a housing cover 110 and a housing base 120. The housing cover 110 is fastened to the housing base 120 to form an interior space for receiving other components.

The housing cover 110 is disposed on the input shaft side and the housing base 120 is disposed on the output shaft 3 side facing the housing cover 110.

A housing cover mounting portion 111 is provided on the outer periphery of the housing cover 110 and a housing base mounting portion 121 is disposed on the outer periphery of the housing base 120 to form a structure in which the housing base mounting portions 121 are engaged with each other.

The housing cover 110 and the housing base 120 each have a housing cover through-hole 113 and a housing base through-hole (not shown) respectively at the center thereof to receive the input shaft 2 and the output shaft 3, So that the torsion bar 5, which directly connects the output shaft 3, can be arranged to be inserted therethrough.

The cover extension portion 112 and the base extension portion 122 are disposed on the outer sides of the housing cover 110 and the housing base 120, respectively, so that the connectors and the like can be arranged.

Meanwhile, the housing cover 110 and the housing base 120 of the present invention may further include components for enhancing self-aligning function and impact resistance against external force when assembling the housing cover 110 and the housing base 120 together. That is, as shown in FIGS. 2 to 5, the housing 100 further includes inclined slope guide portions 115 and 125.

The inclined slope guide portions 115 and 125 are disposed at the end portions where the housing cover 110 and the housing base 120 abut each other. The inclined slope guide portions 115 and 125 include a cover guide 115 and a base guide 125. The cover guide 115 is disposed at the end of the housing cover 110 toward the housing base 120 side and the base guide 125 is disposed at the end of the housing base 120 to face the cover guide 110.

The cover guide 115 has a cover inclined surface 117. The base guide 125 has a base inclined surface 127. The cover inclined surface 117 and the base inclined surface 127 are in contact with each other to make a surface contact . 5, when the external force F is applied to the housing 100, the cover inclined surface 117 and the base inclined surface 127, which contact the cover guide 115 and the base guide 125, An external force F transmitted to the cover inclined surface 117 and the base inclined surface 127 is formed by Fsin? So that the entire surface of the cover inclined surface 117 The external force is dispersed through the inclined slope guide portions 115 and 125 of the triangular slope structure to strengthen the impact resistance against the undesired external force, that is, the shock and the like .

A plurality of such sloped slope guide portions 115 and 125 may be arranged to form a structure in which a plurality of pairs of cover guides 115 and base guides 125 are opposed to each other and engageable with each other. By uniformly distributing the pressure to the external force through a plurality of circumferential arrangement of the inclined slope guide portions 115 and 125, it is possible to secure a stable impact resistance even if an external impact is generated from any side, and the self- Thereby stably guiding the assembly position.

In this case, the plurality of inclined slope guide portions 115 and 125 may have the same structure, but depending on the case, the inclined slope guide portions 115 and 125 may have different structures, for example, at least two inclined slope guide portions, The inclined surfaces of the cover guide 115 and the base guide 125 may be configured to intersect each other from the center of the housing 100. That is, as shown in Figs. 6 (a) to 6 (d), it is also possible to adopt a configuration in which the inclined surfaces are different or the arrangement positions of the vertical and horizontal contact portions are different from each other. Such at least two pairs of cover guides and base guides may have different structures to prevent the possibility of misassembly.

7) is accommodated in the housing 100 and connected to one end of the input shaft 2 to be housed in the housing 100 so as to be rotatable inside the housing 100, as described above, The magnet unit 200 includes a magnet holder 210, a magnet ring 220, a magnet cover 230, and a magnet buffer unit 240.

One end of the magnet holder 210 is connected to the input shaft 2 side and the magnet ring 220 is spaced apart from the magnet holder 210 with the magnet holder 210 interposed therebetween. The magnet cover 230 is disposed between the magnet holder 210 and the magnet holder 210 The magnet buffer 220 is disposed between the magnet cover 230 and the magnet ring 220 so that the magnet cover 220 and the magnet ring 220 are disposed to be connected to the magnet holder 210. The magnet buffer 220 is disposed between the magnet cover 220 and the magnet cover 220, 220).

The magnet holder 210 includes a magnet holder shaft 2110 and a magnet holder base 2120. One end of the magnet holder shaft 2110 is connected to the input shaft 2, and at least a portion of the magnet holder shaft 2110 connected to the input shaft 2 side has a cylindrical structure. The magnet holder base 2120 is disposed at the other end of the magnet holder shaft 2110 and the magnet rings 220 are disposed on both sides.

In the present embodiment, the magnet holder shaft 2110 may be formed of a material such as austenitic stainless steel to secure rigidity that maintains a stable connection with the input shaft 2 side, Various materials can be selected from. The magnet holder shaft 2110 has a holder shaft body 2111 and a holder shaft base 2113. The holder shaft body 2111 has a cylindrical hollow structure having a holder shaft body through-hole 2112 at the center thereof to enable connection with the input shaft 2 side and penetration of the torsion bar 5 and the like, (2113) extends radially at the other end of the holder shaft body (2111).

At this time, the holder shaft base 2113 may further include a holder shaft base groove 2114 on the outer circumferential surface thereof to prevent relative rotation between the holder shaft base 2113 and the magnet holder base 2120 through engagement with the magnet holder base 2120.

The magnet ring 220 is formed of a ring type magnet. In the present embodiment, the magnet ring 220 is formed by multipolar magnetization in the circumferential direction, for example, in the order of N, S, N, S, Are formed of magnets of alternating arrangement. In the present embodiment, the magnet ring 220 includes a magnet upper ring 2210 and a magnet lowering ring 2220. The magnet ring 220 may have the same structure as that of the magnet ring 220, Modification is possible.

The magnet upper ring 2210 and the magnet lowering ring 2220 each include a magnet upper ring body 2211 and a magnet lowering body 2221. The magnet upper ring body 2211 is disposed in the direction of the input shaft, The ring body 2221 is disposed in the direction of the output shaft.

Magnet ring body pits 2213 and 2223 are disposed on the inner circumferential surface of the magnet ring 220. The magnet upper ring 2210 and the magnet lower ring 2220 are provided with magnet upper ring body pits 2213, (2223). The magnet upper ring and the magnet lowering may be made identical to each other and mounted upside down to take up the respective upper / lower structure. The magnet upper ring body pit 2213 and the magnet lowering body pit 2223 are disposed on one side of the end portion of the inner circumferential surface of each magnet ring. Such a structure prevents unnecessary material waste, minimizes unnecessary fluctuations in magnetic flux, It is possible to adopt a structure that minimizes interference with other components when the magnet ring is mounted on the input shaft and the output shaft on the same element.

The magnet upper ring body pit and the magnet lowering body pit may be formed in a groove structure. However, in this embodiment, the magnet upper ring body pit may be formed in a protruding structure and may have various configurations in the range of engaging between the magnet ring and the magnet holder.

The magnet cover 230 is formed so that a magnet ring 220 is disposed between the magnet holder 210 and the magnet holder 210. The magnet cover 230 includes a magnet upper cover 2310 and a magnet lower cover 2320).

The magnet upper cover 2310 is disposed on the input shaft 2 side and the magnet lower cover 2320 is disposed on the output shaft 3 side while the magnet upper cover 2310 is disposed on the input shaft 2 side of the magnet holder 210 And the magnet lower cover 2320 is fastened to one surface of the magnet holder 210 facing the output shaft 3.

The magnet upper cover 2310 includes a magnet upper cover seat 2311 and a magnet upper cover body 2313. The magnet upper cover seat 2311 has a larger diameter than the magnet upper cover body 2313, The upper cover body 2313 has a wide length in the axial length direction of the magnet holder 210. The magnet upper ring 2210 forms a stable accommodating arrangement structure in the magnet upper cover seating portion 2311 and the magnet upper cover body 2313 is connected to the magnet holder 210. [

Similarly, the magnet lower cover 2320 includes a magnet holder cover seating portion 2321 and a magnet holder cover body 2323. The magnet holder cover seating portion 2321 has a larger diameter than the magnet holder cover body 2323 And the magnet holder cover body 2323 has a wide length in the axial length direction of the magnet holder 210. [ The magnet lowering member 2220 forms a stable accommodation structure in the magnet holder cover mounting portion 2321 and the magnet holder cover 2323 is connected to the magnet holder 210.

The magnet buffer unit 240 is disposed between the magnet cover 230 and the magnet ring 220 to perform a buffer function between the magnet cover 230 and the magnet ring 220. The magnet buffer unit 240 includes a magnet upper cover The magnetic buffer unit 240 is disposed on at least one of the magnetron ring 2310 and the magnet upper ring 2210 and between the magnetron cover 2320 and the magnet lowering ring 2220. In this embodiment,

The magnet buffer unit 240 includes a magnet upper buffer unit 2410 and a magnetorror buffer unit 2420. The magnet buffer unit 2410 includes a magnet upper cover 2310, a magnet upper ring 2210, a magnet lower cover 2320, And is disposed between the lower ring 2220.

The magnet buffer unit 240 is interposed between the contact surfaces of the magnet cover 230 and the magnet ring 220 to prevent direct contact between the magnet cover 230 and the magnet ring 220 and to perform a buffer function, Can be minimized. An assembly mounting structure is formed between the magnet cover and the magnet holder. In this embodiment, the two components form a structure to be connected through the ultrasonic welding process. A fine vibration of a considerable frequency is generated between the magnet cover and the magnet holder, and fusion occurs between the contact surfaces of the magnet cover and the magnet holder, thereby achieving a reliable coupling between the magnet cover and the magnet holder. In this process, The microvibration compressing force or the impact force due to the micro-translational motion can be directly transmitted to the magnet ring 220 interposed between the magnet cover 230 and the magnet holder 210. In this process, the possibility of cracking or breakage of the magnet ring The magnet unit 200 of the present invention is provided with the magnet buffer unit 240 and the magnet buffer unit 240 is interposed between the magnet ring 220 and the magnet cover 240 so that the direct contact between the magnet ring 220 and the magnet cover 240 And by allowing a predetermined buffer clearance in the axial direction of the shaft, It is possible to prevent the hand.

In addition, the magnet buffer unit 240 of the present invention is interposed between the magnet cover and the magnet ring. In some cases, the magnet buffer unit 240 may be additionally provided between the magnet holder and the magnet ring.

The magnet buffer unit 240 of the present invention may perform a performance maintaining function in the operation process in addition to the impulse attenuation function through buffering in the assembly manufacturing process. For example, the magnet ring 220 and the magnet cover 220 to the magnet holder 210 have different thermal expansion coefficients due to different materials, and when a predetermined heat is received during operation, It is possible to minimize the risk of peeling or breakage which may occur in the case of forming a direct contact structure due to the difference in the occupied space due to the different thermal expansion between the predetermined structures.

The magnet buffer unit 240 included in the magnet unit 200 of the present invention may be selected from a variety of materials as long as the damage to the magnet ring is prevented. Coating layer. That is, as shown in FIGS. 16 and 17, after being applied between the magnet cover 230, that is, between the magnet upper cover 2310 and the magnet upper ring 2210, Thereby forming a portion 240. At this time, the applied silicon may be formed of heat-resistant silicone to prevent the buffering function from being weakened due to heat generation.

In the present embodiment, the magnet buffer portion 240 is formed of a silicon coating layer, but may be formed of a magnet buffer portion formed of a material of a ring type felt or nonwoven fabric as shown in FIG. The thickness of the felt or the nonwoven fabric can be variously configured according to the setting specifications of the buffering function, and an adhesive layer may be further provided on one side or both sides of the magnet buffer part.

As described above, the magnet buffer portion can be selected from various materials within a range that attenuates the amount of impact due to contact between the backlight.

Meanwhile, the magnet holder base 2120 includes a holder base body 2121 and holder base body pads 2123 (2123-1, 2123-2, 2123-3, and 2123-4). The holder base body 2121 is connected to the magnet holder shaft 2110 and integrally rotates with the magnet holder shaft 2110, and the holder base body pads 2123 (2123-1, 2123-2, 2123-3, Can be engaged with the magnet ring body pits 2213 and 2223 formed on the inner peripheral surface of the magnet ring 220 on one side of the holder base body 2121. [

The holder base body pads 2123 (2123-1, 2123-2, 2123-3, and 2123-4) and the magnet ring body pits 2213, 2223 are opposed to each other to form a pair of engageable structures, A plurality of pairs of the base body pit and the magnet ring body pit may be provided.

As described above, the magnet ring body pit may have a receiving groove structure and the corresponding holder base body pits may have a protruding structure. However, in an embodiment of the present invention, the magnet ring body pit may have a protrusion structure and a corresponding holder base The body fit has a receiving groove structure.

When the holder base body pit forms a receiving groove structure, it may further include a structure for smooth reception of the magnet ring body pit of the projection structure. That is, the holder base body pads 2123 (2123-1, 2123-2, 2123-3, and 2123-4) include a holder base body pit receiving groove 2123a and a holder base body pit guide 2123b. The holder base body pit receiving groove 2123a is a groove structure for receiving the magnet ring body pits 2213 and 2223. The holder base body pit guide 2123b is formed outside the holder base body pit receiving groove 2123b, The width of the base body fit accommodating groove 2123b is larger than the width of the base body fit accommodating groove 2123b.

With this structure, positional alignment through the engagement between the magnet ring and the magnet holder can be smoothly performed and the assembling property can be improved.

The holder base body pit 2123 formed on both sides of the holder base body 2121 may be formed on the upper surface of the holder base body 2121 and the holder base body pit 2123 formed on both sides of the holder base body 2121 may be formed on the upper surface of each of the magnet upper ring and the magnet lower ring. And can be engaged with the magnet upper ring body pit 2213 and the magnet lowering body pit 2223.

The holder base body pads 2123 formed on both sides of the holder base body 2121 of the magnet holder base 2120 of the magnet holder may be arranged symmetrically on both sides of the holder base body 2121, theta], respectively. When the structure is arranged on both sides, the assembly process can be simplified and clarified by the symmetry of the assembly position.

Further, a press-fit structure can be formed for smooth assembly when fitting the magnet holder and the magnet ring. That is, of the plurality of pairs of magnet ring body pits 2213 and 2223, two adjacent pairs of magnet ring body pits 2213-1, 2213-2, 2223-1 and 2223-2 and a holder base body pit 2123-1 and 2123-2 and the rest, that is, the magnet ring body pits 2213-3, 2213-3, 2223-4, and 2223-4 in this embodiment, and the holder base body pits 2123-3, and 2143-4 are characterized in that they form a hull free space fitting structure.

That is, as shown in FIGS. 12 to 14, the magnet ring body pits 2213-1, 2213-2, 2223-1, and 2223-2 and the holder base body fits 2123-1, 2, the clearance between the magnet ring body fits 2213-3 (2213-3, 2223-4) and 2223-4 and the holder base body fits 2123-3 and 2123-4, which are loosely fitted, The pitch error of xt, yt occurs in each direction between the tracks. It is possible to eliminate the completely restrained state in each direction and to allow a predetermined clearance, but to assure an assembly position reference through intermediate fitting at two points.

The magnet holder and the magnet cover may be assembled through separate fastening elements. However, the present invention provides a fastening structure by ultrasonic welding so that the magnet ring and the magnet buffer portion disposed in the space between the magnet holder and the magnet cover can be stably Can be maintained.

The magnet upper cover body 2313 of the magnet upper cover 2310 and the magnet lower cover body 2323 of the magnet lower cover 2320 are fixed to the holder 2120 of the magnet holder base 2120 of the magnet holder 210, Contacts the base body 2121,

At least one of the sides of the magnet upper cover body 2313 and the magnetower cover body 2323 and the side of the holder base body 2121 is provided with fused protrusions 2315 and 2325 for ultrasonic welding. In this embodiment, fused protrusions for ultrasonic welding are formed on the magnet upper cover body 2313 and the magnetower cover body 2323 side. The magnet upper cover body 2313 and the magnetor cover body 2323 are provided with a magnet upper cover fused protrusion 2315 and a magnet lower cover fused protrusion 2325. The magnet upper cover body 2313 and the magnet lower cover body 2323 are respectively formed When the ultrasonic micro-oscillation is performed through the ultrasonic welding process, they are thermally welded to each other to form an intimate bonding state therebetween, thereby preventing the movement of the magnet ring.

The collector unit 300 of the present invention is positioned on the housing 100 and disposed outside the magnet unit 200 to focus the magnetic field of the magnet unit 200. The collector unit 300 of the present invention includes a collector holder 300, 310 and a collector 320.

The collector holder 310 is fixedly mounted on the housing 100 and the collector 320 is fixedly mounted on the collector holder 310 to focus the magnetic field formed by the magnet unit 200 disposed therein, A sensor such as a torque sensor 410 detects a magnetic flux change and senses the rotational displacement of the input shaft and the output shaft to thereby output torque from the sensor Can be calculated.

The collector unit 300 of the present invention eliminates the insert molding structure of the collector 320 to prevent thermal deformation and minimizes the possibility of damage due to peeling off from the resin material for a long period of use. It is a collector unit with a structure that is possible and maintains excellent structure.

The collector 320 of the present invention has a structure disposed on both sides of the collector holder 310 and each of the two collectors 320 is disposed on each side of the collector holder 310. Each of the collectors 320 Are spaced apart in the longitudinal direction of the magnet unit rotating shaft with a predetermined gap. The collector 320 forms a predetermined ring structure, and the magnet unit 200 is disposed so as to be relatively rotatably received therein.

The collector 320 includes a collector ring 3210 and a collector terminal 3220. The collector ring 3210 includes collector ring horizontal portions 3211 and 3221 and collector ring vertical portions 3213 and 3223. The collector ring horizontal portions 3211 and 3221 are formed on a plane perpendicular to the longitudinal direction of the rotary shaft of the magnet unit 200 and the collector ring vertical portions 3213 and 3223 are formed in the longitudinal direction of the rotary shaft of the magnet unit 200 And one end thereof is connected to the inner end of the collector ring horizontal portions 3211 and 3221. [

The collector terminal 3220 extends from one end of the collector ring horizontal portions 3211 and 3221 of the collector ring 3210 toward the torque sensor 410 and forms a predetermined bending structure so that the torque sensor 410, It is possible to take a structure that minimizes the air gap with the air.

The collector ring 320 is provided with collector ring mounts 3215 and 3225, which are connected to the collector holder 310 side.

The collector holder 310 includes a collector holder body 311 and a collector holder extension 313. The collector holder extension 313 is connected to the collector holder body 311 and is connected to the torque sensor of the sensing unit 400 410 and the like can be executed. The collector holder body 311 is formed with a collector holder body mounting portion 3111 corresponding to the collector ring mounting portions 3215 and 3225. In this embodiment, the collector holder body mounting portion 3111 has a protruding structure and the collector ring mounting portions 3215 and 3225 have a through-hole structure. A stable fastening structure between the collector holder body 311 and the collector ring 320 can be formed through the structure in which the collector holder body mounting portion 3111 and the collector ring mounting portions 3215 and 3225 are engaged with each other.

In some cases, when a plurality of collector ring mounting portions 3215 and 3225 having through-hole structures are provided, the collector ring mounting portions 3215 and 3225 may have different penetration shapes to provide clearance in the assembling process after prevention of misassembly. That is, one of the plurality of collector ring mounting portions has a circular structure and the other has an elliptical structure to secure a minimum assembly position, and a predetermined clearance space is provided through another collector ring mounting portion to enable a stable assembly process It is possible.

A collector holder body mounting end 3115 is formed on the collector holder body 311. The collector holder body mounting end 3115 is formed on one surface of the collector holder body 311, The collector holder body mounting portion 3111 is disposed on one side of the collector holder body mounting end 3115 and the collector ring 320 is disposed on one side of the collector ring body mounting portion 311. In other words, A part of the collector holder body 311 is held in contact with one surface of the collector holder body mounting end 3115 so that at least a part of the collector ring 320 is spaced apart from one surface of the collector holder body 311, . The stress applied to the collector ring 320 can be minimized due to the surface contact limiting structure. That is, in this embodiment, the collector ring 320 is supported by three points with respect to the collector holder 310, and the separation step height indicated by the reference symbol t is formed in an area other than the point of the collector holder body mounting end 3115 Thereby minimizing the stress applied to the collector ring 320, that is, the stress caused by the difference in the thermal expansion rate, the stress due to the stress difference caused by the bolt fastening or the like in the assembling process, and ultimately, So that the sensitivity through the torque sensor 410 can be kept constant.

Meanwhile, the connection between the collector holder body mounting portion 3111 and the collector ring mounting portions 3215 and 3225 according to an embodiment of the present invention may have a fixed structure through caulking. That is, after the collector ring is mounted on the collector holder, that is, after the collector ring mounting portions 3215 and 3225 are inserted and mounted on the collector holder body mounting portion 3111, (See FIG. 21) with respect to a plurality of positions through an automatic process, so as to adjust the caulking height h (see FIG. 21) to a constant Thereby preventing work dropout, and ultimately shortening the working time, thereby preventing the work speed from being lowered through the previous bolt or screw fastening.

According to an embodiment of the present invention, the collector holder body 311 of the present invention is formed with a collector holder body mounting portion 3111 to prevent buckling or breakage due to a decrease in rigidity during a calking process between the collector holder and the collector ring The collector holder body mounting reinforcement 3113 may be provided at a lower portion of the collector holder body mounting end 3115 to have a larger cross section than the outer circumferential end face of the collector holder body 311, that is, as a thicker portion, to reinforce the rigidity. Further, rigidity can be further reinforced through the collector holder body rib 315 on the outer periphery of the collector holder body 311.

On the other hand, the collector holder body mounting portion 3111 may have an inclined structure for self-alignment of the collector ring in the caulking and assembling process. 23 and 24, the outer circumferential surface of the collector holder body mounting portion 3111 has a structure (DA <DB) in which the outer circumference is increased to face the collector holder body mounting end 3115, It is possible to perform predetermined alignment through predetermined self-alignment in the insertion process.

Further, the collector holder and the collector ring may have various structures other than the caulking structure.

22 and 25, the collector holder body mounting portions 3111b and 3111d may be formed in a snap-fit structure. The ends of the collector holder body mounting portions 3111b and 3111d form a hook end portion, Grooves 3112b and 3112d are provided to enable a predetermined elastic movement. In some cases, a structure may be further provided in which a pit rib 3114d is disposed on the outer periphery of the collector holder body mounting portion 3111d so that a collector ring is disposed between the hook end and the pocket rib to minimize stress applied to the collector ring have.

The sensing unit 400 of the present invention includes a torque sensor 410 disposed on the outer circumferential side of the collector unit 300 to sense a magnetic field concentrated through the collector unit 300, In the example, two torque sensors 410 may be disposed to increase the sensing performance and further provide a fail-safe function. The torque sensor 410 is mounted on the torque sensor substrate 401 and the torque sensor 410 is disposed between the collector ring terminals 3220 formed in the collector ring 320 of the collector unit 300 to change the magnetic field So that the torque between the input shaft and the output shaft can be calculated.

The torque sensor 410 may be a hall sensor (Hall sensor IC) of a non-contact type, an MR sensor, an AMR sensor, a GMR sensor, or the like. That is, the torque sensor 410 detects the relative rotation difference between the input shaft 2 and the output shaft 3 by an electric (not shown) generated due to a change in the magnetic field generated by the relative rotation between the magnet unit 200 and the sealing unit 500 And takes a structure capable of torque calculation through the difference of signals.

In addition, the sensing unit 400 of the present invention may further include an angular sensor module 420 for detecting a rotational displacement, that is, a steering angle in the case of a steering wheel of a vehicle, in addition to the torque sensor 410. The angular sensor module 420 includes an angular sensor 4240, an angular magnet 4230, an angular rotor 4220, and an overbody angular gear. The angular sensor 4240 may be a non-contact type hall sensor, an MR sensor, an AMR sensor, a GMR sensor, or the like. The angular sensor 4240 is fixedly positioned relative to the housing 100. The angular sensor 4240 is mounted on the angular sensor substrate 402 (see FIG. 19), and the angular sensor substrate 402 is mounted on the housing 100 And is fixedly mounted on the housing base 120. The torque sensor substrate 401 may form a connection structure for electrical communication with the angular sensor substrate 402. The angular magnet 4230 is disposed so as to be rotatable relative to the angular sensor 4210, and the angular magnet 4230 is disposed on the angular rotor 4220.

In the present embodiment, two angular sensors 4240, an angular rotor 4220 and an angular magnet 4230 are disposed to perform sensitivity enhancement and fail safe function through correction and crosscheck, Signal detection can be enabled, but the present invention is not limited to the number. The constituent elements of these pairs have basically the same structure although they are different in size, and one of the two structures will be mainly described.

The angular rotor 4220 includes a rotor body 4221, a rotor gear 4225 and a rotor guide 4227. The rotor body 4221 includes a rotor body receiving portion 4223. The rotor body receiving portion 4223 The angular magnet 4230 is disposed.

The rotor gear 4225 is disposed at the outer circumferential end of the rotor body 4221 and engages with the over-body angular gear 533 to rotate relative to the angular magnet 4230.

The rotor body receiving portion 4223 includes rotor body receiving portion stoppers 42233 and 422235. The rotor body receiving portions 4233 and 422235 are formed on the inner surface of the rotor body receiving portion opening 42231 to prevent the angular magnet 4230 from departing from the undesired rotor body 4221. In this embodiment, the angular magnet is insert-injected into the rotor body accommodating portion. However, the rotor body accommodating portion may be directly inserted through the stopper structure.

The rotor guide 4227 protrudes from the rotor body 4221 in the longitudinal direction of the rotor body 4221 so that the rotor guide 4227 can stably rotate the rotor body through contact with other components, .

The over-body angular gear 533 is provided in the shield ring over body 530 of the shield ring unit 500. The rotation angle of the over-angular gear 533 is controlled by the rotational displacement detection on the output shaft 3 side, Lt; / RTI &gt; Overbody

The angular sensor module 420 may further include an angular holder 4210 disposed on the housing 100, more specifically, on the housing base 120 side. The angular holder 4210 includes an angular rotor 4220 In a rotatable manner. More specifically, the angular holder 4210 includes an angular holder receiving portion 4213, an angular holder guide 4211, an angular holder elastic receiving portion 4217, and an angular holder elastic portion 4215.

The angular holder receiving portion 4213 is formed as a space that can accommodate the rotor gear 4225 without interference when the rotor body 4221 rotates and the angular holder guide 4211 is formed in a space corresponding to the corresponding one of the rotor guides 4227 The rotor body 4221 is rotatably supported in face-to-face contact with the rotor guide 4227 and the angular holder elastic receiving portion 4217 is supported on the opposite side of the open side of the angular holder 4210, that is, on the opposite side of the angular rotor 4220 The other end of the resilient portion 4215 is supported on the side of the housing 100 and the other end of the resilient portion 4215 is supported on the side of the housing 100. The other end of the resilient portion 4215 is supported by the resilient accommodating portion 4217 (4210).

In some cases, the angular holder 4210 is provided with a holder moving guide 4218 extending along the moving direction of the angular holder 4210, and a holder movable guide corresponding portion (not shown) is provided on the housing side in correspondence with the holder moving guide 4218 The stable operation of the angular holder 4210 in the elastic supporting state can be achieved.

Here, the angular holder guide 4211 and the rotor guides 42271 and 422273 are arranged in pairs in the longitudinal direction of the rotary shaft of the rotor body 4211, even though they are arranged corresponding to each other. That is, as shown in FIG. 26, the angular holder guide and the rotor guide are disposed in the longitudinal direction of the rotating shaft of the angular rotor.

The journal bearing function may be performed through these abutment structures to allow the angular rotor to form a stable pivoting guide structure with respect to the angular holder.

Meanwhile, the angular holder guide and the rotor guide, which are spaced apart from each other in the direction of the axis of the rotary shaft, can be different from each other. That is, the rotor guide includes a rotor upper guide 42271 and a rotor lower guide 42273. The angular holder guide 4211 includes an angular holder upper guide 42111 and an angular holder lower guide 42113, A pair of upper and lower parts, that is, different sizes between the upper part and the lower part, can completely block the misassembly state in which the angular rotor is inverted and inserted and accommodated in the inverted state.

However, when a plurality of angular rotors are disposed, a dimension that does not overlap at least one of the upper part and the lower part between the plurality of angular rotors is set to be smaller than the dimension that does not overlap the upper part and the lower part. So that it is possible to prevent all the angular rotors from being inserted and disposed at positions other than the predetermined positions.

Further, the rotor upper guide 42271, the rotor lower guide 42273, the angular holder upper guide 42111, and the angular holder lower guide 42113 may further have a configuration for enhancing the stable rotation of the angular rotor. In other words, when the angular holder upper guide 42111 and the angular holder lower guide 42113 are provided with inclined surfaces and the inclined surfaces formed by the upper and lower parts face toward the center of the angular rotor, And II-II cross each other toward the center of the pivot axis of the angular rotor, and the rotor upper guide 42271 and the rotor lower guide 42273 can also form a corresponding inclined surface structure See FIG. 30). As described above, the rotor upper guide 42271 and the rotor lower guide 42273 have a structure in which the normal line of the inclined plane is disposed toward the center of the rotating shaft toward the center of the ""type, thereby stably accommodating the angular rotor can do. That is, it is possible to prevent the positional shift of the angular rotor in the direction of the axis of rotation when the angular rotor rotates, thereby remarkably reducing the possibility of occurrence of a faulty state by forming a more stable operating state. Of course, in this case as well, the protruding lengths of the rotor upper guide and the rotor lower guide toward the rotational axis of the angular rotor may have different values to prevent erroneous assembling of the angular rotor that forms the upper and lower pairs. Through such a structure, the angular rotor can form a stable pivoting structure in the receiving portion of the angular holder.

The shield ring unit 500 of the present invention is disposed between the collector unit 300 and the magnet unit 200 and is connected to one end of the output shaft 3 and is connected to the collector unit 300 through the collector unit 300, The magnetic field of the magnet unit 200 is changed by the relative rotation between the input shaft 2 and the output shaft 3 so that the torque sensor 410 of the sensing unit 400 changes the magnetic signal output So that it is possible to sense an applied torque between the input shaft and the output shaft.

The shield ring unit 500 of the present invention includes the shield ring body 510 and the shield ring piece 520. The shield ring body 510 is disposed inside the collector unit 300 and accommodates the magnet unit 200 relatively rotatably inside the shield ring body 510. The shield ring body 510 includes a magnet unit 200 disposed on the input shaft side Collector unit 300 and rotate together with the output shaft 3. [ A plurality of shield ring pieces 520 are spaced apart from the shield ring body 510 at predetermined intervals on the outer periphery of the shield ring body 510.

The shield ring piece 520 is formed of a soft magnetic material such as permalloy to perform a function of changing the path of a magnetic field between the magnet unit and the collector unit, but is not limited thereto. The shield ring piece 520 can be manufactured through a punching and cutting process of a strip type material, and can be formed into a reel type, and a predetermined automation process can be inserted and disposed in the integrated shield body.

The shield ring piece 520 includes a ring-piece body 521 and a ring-piece connection portion 523. The ring-piece body 521 is disposed substantially perpendicular to the radial direction of the shield ring unit 500, (510), more specifically, the shield body holder ring piece portion 51311 described below. The ring piece connecting portion 523 extends vertically to the end portion of the ring piece body 521 and is seated in the shield body round receiving portion 51311. The shield ring piece 520 may be formed as a unit body and manufactured through a bending process. A ring-piece connection portion 525 is formed in the ring-piece connection portion 523.

A ring-piece body chamfering 528 may be formed at the end of the ring-piece body 521 to form a stable and smooth insertion structure in the process of insertion into the shield ring body 510.

The method of inserting and mounting the shield ring piece 520 can reduce the material cost and reduce the process cost through the automated process. In addition, the amount of scrap or the like can be minimized through simple optimization of the shape of the shield ring piece 520, thereby preventing waste of unnecessary materials, thereby achieving cost reduction. In addition, it is possible to increase the process error and the yield of good products by enabling automatic assembly.

In addition, through the insertion arrangement structure of the plurality of shield ring pieces 520 to the shield ring body 510, the clear separation of the shielding portion and the non-shielding portion region and the possibility of exposure to unwanted regions are completely prevented, It is possible to prevent degradation or trouble. That is, instead of the shield ring piece as a conventional shield ring, a strip type shield ring having a through hole is formed as a non-shielding portion with the same function as the shield ring body. When the strip type shield ring is inserted into the shield ring body, It is difficult to uniformize the molding thickness of the strip-type shield ring with respect to the molding area. This may cause a problem of the shield ring being exposed to the molding area that does not require exposure. It is possible to fundamentally block such defective problems through the insertion arrangement structure of the piece type of the present invention.

The shield ring body 510 has a shield sleeve 511 and a shield body 513. The shield sleeve 511 may be made of a material such as austenitic stainless steel so as to secure rigidity that maintains a stable connection with the output shaft 3 side, but various materials may be selected within a range that secures predetermined rigidity It is possible.

The shield sleeve 511 is connected to one end of the input shaft 2 side. The shield sleeve 5111 includes a sleeve shaft 5111 and a sleeve parcel ferrule 5113. The sleeve shaft 5111 is connected to one end of the input shaft 2 side and a sleeve shaft through hole 5112 is formed at the center of the sleeve shaft 5111 to permit passage of components such as a torsion bar.

The sleeve ferrule 5113 extends radially to the end of the sleeve shaft 5111. At least one sleeve par- feral groove 5115 is formed in the sleeve par- ferer 5113 to prevent relative rotation with the shield body 513. The shield ring body of the present invention may be formed through a separate fastening structure of the shield sleeve and the shield body, but the shield ring body of the present invention has a structure formed integrally with the shield body through the insert injection of the shield sleeve.

The shield body 513 is connected to the shield sleeve and is equipped with a shield ring piece. The shield body 513 includes a shield body round 5131 and a shield body holder 5133. The shield body 5131 is connected to the shield sleeve and the shield body holder 5133 is connected to the shield body round 5131 to enable the reception and mounting of the shield ring piece 520.

The shield body rounder 5131 is provided with a shield body round receiving portion 51311 for seating one end of the shield ring piece 520. The shield body round section seating portion 51311 includes a seating groove 51311a and a seating fusion projection 5131b and the seating groove 51311a is formed on one side of the shield body round section seating portion 51311. The seating groove 51311a is formed in a groove structure to allow a ring-piece connection portion 523 connected to the ring-piece body 521 of the shield ring piece 520 to be accommodated.

The seating fusion protrusions 51311b are formed on one surface of the seating groove 51311a and are formed in a protruding structure that can be inserted corresponding to the ring-piece connection mounting portion 525. [ The seating fused protrusion 51311b of the present embodiment is inserted into the ring-piece connection mounting portion 525 and is pressed through heat fusion to prevent the shield ring from coming off.

The shield body holder 5133 is provided with a shield body holder ring piece through hole 5134 and a shield body holder ring piece receiving portion 5135 is provided inside the shield body holder ring through hole 5134, The holder ring piece receiving portion 5135 seats and supports the other end of the shield ring piece 520, that is, the ring piece body 521, thereby forming a stable mounting structure in the shield body holder.

The shield body holder ring piece seating portion 5135 is provided with a ring piece seating alignment guide 5135a and the ring piece seating and aligning guide 5135a is provided inside the shield body holder ring through hole 5134, And is inclined in a dovetail structure so as to face toward the center side of the base 5133. That is, the inner width formed by the ring-piece seating aligning guide 5135a is greater than the width of the shield body holder ring through-hole 5134, thereby preventing the end of the ring-piece body from deviating to the outside.

The shield body holder ring piece seating portion 5135 includes a ring piece seating stopper 5135b and the ring piece seating stopper 5135b is fixed to the shield body holder 5133 by the end of the shield body holder ring piece seating portion 5135 Of the shield ring piece so as to support the end portion of the ring-piece body of the shield ring piece.

At this time, a ring-piece guide corresponding portion 5137 is formed on one surface of the ring-piece mounting stopper 5135b, a ring-piece guide 527 is formed at an end of the ring- And the ring piece guide 527 are engaged with each other. In this embodiment, the ring piece guide 527 has a concave structure and the ring piece guide corresponding portion 5137 has a protrusion structure, . Although two ring-piece guides 527 and 5137 are provided in this embodiment, the number of the ring-piece guide 527 and the ring-piece guide corresponding portion 5137 of the present invention is not limited to the number.

The shield ring unit 500 further includes a shield ring over body 530. The shield ring over body 530 is coupled to the shield ring body 510, And the shield ring piece 520 is fixedly supported.

The shield ring over body 530 permits penetration of other components through the over body through hole 531 and forms an over body angular gear 533 on the outer circumference so that the angular magnet 4230 of the sensing unit 400 And is engaged with the angular rotor 4220 to be disposed.

The shield ring over body 530 may be coupled through a separate fastening system. However, in this embodiment, the shield ring body with the shield ring piece is insert-injected and overmolded to prevent positional variation of the component It is possible to provide an integrated structure.

A shield body 513 is formed through a primary molding process of the shield sleeve 511 to form a shield ring body 510 and the shield ring piece 520 is prepared through a punching, cutting and bending process 32, Fig. 33, and Fig. 36)

Thereafter, the shield ring piece 520 is inserted into the shield ring body 510 (see FIG. 37). After the shield ring piece 520 is inserted into the shield ring body 510, that is, the seating fusion protrusion 51311b is arranged to penetrate the ring-piece connection attachment portion 525 of the shield ring piece 520, And the other end of the ring piece body 521 of the shield ring piece 520 is received in the seating groove 51311a of the shield body round section seating portion 51311 of the shield body ring piece seating portion 5135 After the insertion arrangement guided by the ring piece seating alignment guide 5135a and end-supported by the ring piece seating stopper 5135b to prevent unwanted release of the shield ring piece is completed, the seating fusion protrusion is heat- The position of the piece may be fixed. Then, the shield ring over body 530 is overmolded at one end of the shield ring body, that is, at the ring piece connection side of the shield ring piece, so that the shield ring over body 530 can be formed on one side of the shield ring body (see FIGS. 38 and 39).

As described above, according to the present invention, the torque applied to the shaft can be variously changed within a range of sensing through a non-contact type method. In the above embodiments, the magnet unit is disposed on the input shaft side and the shield ring unit is disposed on the output shaft side. However, it is apparent from the present invention that the configuration opposite to the above may be employed.

100 ... housing 110 ... housing cover
120 ... housing base 200 ... magnet unit
210 ... Magnet holder 220 ... Magnet ring
230 ... Magnet cover 240 ... Magnet buffer section
300 ... collector unit 310 ... collector holder
320 ... collector 400 ... sensing unit
410 ... torque sensor 420 ... angular sensor module

Claims (4)

A torque sensor device disposed between an input shaft and an output shaft for detecting a torque between an input shaft and an output shaft through a relative rotational displacement between an input shaft and an output shaft, A magnet unit including a magnet ring accommodated in the housing and connected to one end of an input shaft and an output shaft, the magnet ring being accommodated in the housing so as to be rotatable within the housing; A collector unit fixed to the housing and disposed outside the magnet unit to focus a magnetic field of the magnet unit; A sensing unit disposed on an outer circumferential side of the collector unit and including a torque sensor for sensing a magnetic field focused through the collector unit; A shield which is disposed between the collector unit and the magnet unit and is connected to one end of the other of the input shaft and the output shaft to change the magnetic field of the magnet unit through the collector unit by relative rotation between the input shaft and the output shaft, Wherein the housing cover includes: a housing cover disposed on an input shaft side; and a housing base disposed on an output shaft side facing the housing cover, wherein an end portion of the housing cover contacting the housing base is inclined A slope guide portion is provided,
Wherein the inclined slope engaging portion includes: a cover guide disposed at an end of the housing cover; and a base guide disposed opposite to the cover guide at an end of the housing base, wherein at least a part of the cover guide and the base guide And an inclined surface intersecting a line segment extending from the center of the housing toward the radial direction,
The shield ring unit includes: a shield ring body disposed inside the collector unit and housing the magnet unit in a relatively rotatable manner; and a shield ring body disposed at a predetermined interval in the shield ring body, And a plurality of shield ring pieces spaced apart from the outer periphery of the body,
A shield sleeve is provided at one side of the shield ring body, the shield sleeve is connected to one end of the input shaft,
The shield sleeve includes: a sleeve shaft connected to one end of an input shaft; and a sleeve peripheral ferrule extending radially from the end of the sleeve shaft, wherein at least one sleeve peripheral ferrule groove is formed in the sleeve peripheral ferrule . delete The method according to claim 1,
Wherein the cover guide and the base guide are spaced apart from each other along the circumference of the housing cover and the housing base. The method of claim 3,
Wherein the cover guide and the base guide are arranged in pairs so as to be opposed to each other,
Wherein at least two pairs of the cover guide and the base guide have inclined surfaces that intersect each other differently from the center of the housing.

Images