Steering device

Abstract

The present invention relates to a steering device. The steering device according to one aspect of the present invention includes a housing for accommodating a rod which is slidable in an axial direction to steer a wheel, and provided with a sensor coupling portion which penetrates an inner side surface and an outer side surface of the housing to expose a portion of the rod; a rotation prevention portion coupled to the rod through the sensor coupling portion and moved together with the rod, and supported in a width direction of the housing to restrict rotation of the rod; a damper coupled to the rotation prevention portion in a manner provided between the sensor coupling portion and the rotation prevention portion; a magnetic bracket coupled to the rotation prevention portion and moved together with the rod, and having a magnet; and a sensing portion including a sensor coupled to the sensor coupling portion and for sensing a position of the magnet.

Description

TECHNICAL FIELD

[0001] The present application relates to a steering apparatus, and more particularly, to a steer-by-wire type steering apparatus in which a mechanical connection between a steering wheel and driving wheels of a vehicle is separated. BACKGROUND

[0002] Generally, a steer-by-wire type steering apparatus is an electric power steering apparatus, which is a device in which a steering column, a universal joint, or the like is not present between a steering wheel and a steering apparatus, and in which a vehicle is steered using electric driving force.

[0003] Such a steer-by-wire type steering apparatus can steer front wheels or rear wheels, or can steer both the front wheels and the rear wheels. That is, a slide bar (hereinafter, referred to as a "bar") connected to the front wheels or the rear wheels is caused to slide in an axial direction, thereby causing the front wheels or the rear wheels to be steered.

[0004] Such a bar is driven by a motor, and since a pinion shaft is not provided in the steer-by-wire type steering apparatus, a rotation prevention member combined with the bar is supported by a housing and prevents rotation of the bar. At this time, the rotation prevention member not only simply performs a function of limiting rotation of the bar, but also is used by providing a displacement measuring sensor for confirming a position of the bar in order to control a displacement amount of the bar according to a steering angle generated by steering wheel operation of a driver.

[0005] However, as the bar is caused to slide in a state in which its rotation is limited by the rotation prevention member, a problem of an increase in a gap between the rotation prevention member and the housing occurs due to wear occurring in the rotation prevention member. Such an increase in the gap causes an impact between the rotation prevention member and the housing, thereby causing a problem of generation of noise and vibration. In addition, there is a problem of a decrease in accuracy of a sensor for determining a position of the bar with respect to the rotation prevention member due to the increase in the gap. SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The present embodiment aims to provide a steering apparatus which not only prevents rotation of a bar, but also minimizes noise and vibration generated due to an impact between the bar and a housing.

[0008] The present embodiment aims to provide a steering apparatus which, even if wear occurs between a bar and a housing, can stably support by compensating for a gap, thereby being able to prevent a decrease in accuracy of a sensor for sensing a position of the bar.

[0009] MEANS FOR SOLVING PROBLEMS

[0010] According to an aspect of the present application, there can be provided a steering device including a housing for accommodating a rod slidable in an axial direction to steer a wheel, and having a sensor coupling portion penetrating an inner side surface and an outer side surface of the housing to expose a portion of the rod, a rotation prevention portion coupled to the rod through the sensor coupling portion and moving together with the rod, the rotation prevention portion being supported in a width direction of the housing to restrict rotation of the rod, a damper coupled to the rotation prevention portion in a manner of being disposed between the sensor coupling portion and the rotation prevention portion, a magnetic bracket coupled to the rotation prevention portion and moving together with the rod, and having a magnet, and a sensing portion including a sensor coupled to the sensor coupling portion and for sensing a position of the magnet.

[0011] The rotation prevention portion can include a support member formed with at least one coupling hole and coupled to the rod, and a fixing bolt inserted into the coupling hole and coupled to the rod.

[0012] The rod can be provided with a chamfered portion, and the support member can be seated in contact with a face of the chamfered portion.

[0013] The support member can have a coupling portion whose center is convex upward, and the coupling hole can be coupled to both sides of the support member in the axial direction.

[0014] The coupling portion can be formed with a fastening groove coupled to the magnetic bracket.

[0015] The coupling hole can be provided with a bushing.

[0016] The damper can be coupled to an outer side surface of the support member, and disposed in a compressed state between the support member and the sensor coupling portion.

[0017] The damper can include a grease pocket for storing fluid to lubricate a space between the damper and the sensor coupling portion.

[0018] The grease pocket can be formed in a plurality at a prescribed interval on an outer side surface of the damper.

[0019] The sensor coupling portion can have a longer elongated hole formed in the axial direction, and the elongated hole can include a first elongated hole into which the rotation prevention portion is inserted, and a second elongated hole formed on an outer peripheral surface side of the first elongated hole to form a step with the first elongated hole, a portion of the sensing portion being inserted and coupled to the second elongated hole.

[0020] The magnetic bracket includes a body, a magnet fixed to the body, a fastening portion protruding from a lower portion of the body and coupled to the rotation prevention portion, and a fastening groove into which the fastening portion is inserted can be formed in the rotation prevention portion.

[0021] The fastening portion is formed in a spherical shape having a diameter greater than a diameter of the fastening groove, a cut groove formed in a vertical direction is provided at a center of the fastening portion, and the fastening portion can be deformed and pressed into the fastening groove through the cut groove.

[0022] The sensing portion can include a sensor housing coupled to the sensor coupling portion to enclose the sensor coupling portion, a pair of guides formed at a lower side of the sensor housing inserted into the sensor coupling portion and spaced apart in a width direction and formed in an axial direction, and the magnetic bracket can be supported and moved between the pair of guides.

[0023] According to another aspect of the present application, a steering device can be provided, which can include a housing for accommodating a rod that can slide in an axial direction to steer a wheel and having a sensor coupling portion that penetrates an inner side surface and an outer side surface of the housing to expose a portion of the rod, a rotation prevention portion coupled to the rod through the sensor coupling portion and moving together with the rod, the rotation prevention portion being supported in a width direction of the housing to restrict rotation of the rod, a damper coupled to the rotation prevention portion and disposed between the sensor coupling portion and the rotation prevention portion, a magnetic bracket freely coupled to the rotation prevention portion and moving together with the rod and configured with a magnet, and a sensing portion including a sensor coupled to the sensor coupling portion and for sensing a position of the magnet.

[0024] The magnetic bracket can include a body, a magnet fixed to the body, a spherical fastening portion inserted into a fastening groove provided in the rotation prevention portion, the fastening portion can rotate a predetermined angle in the fastening groove with the center of the fastening portion as a reference, and can move in the fastening groove in a direction orthogonal to an axial direction of the rod.

[0025] The magnet can be formed in one body with the body through insert molding.

[0026] The sensing portion can include a sensor housing combined with the sensor combining portion to enclose the sensor combining portion, a pair of guides formed at a lower side of the sensor housing inserted into the sensor combining portion and spaced apart in a width direction and formed in an axial direction, and the magnetic bracket can be moved between the guides by being provided with a support portion on each of both sides in the width direction thereof, the support portion being supported between the pair of guides.

[0027] The guides include guide holes formed in a length direction, and the support portions can include a first support portion inserted into the guide holes and supported, and a second support portion supported by the guides.

[0028] At least one of the first support portion and the second support portion can be divided into a plurality in the length direction.

[0029] The first support portion can be formed in a wedge shape having an inclined one side surface.

[0030] Inventive Effects

[0031] The steering device according to the present embodiment not only has an effect of preventing the rod from rotating by the rotation preventing portion, but also has an effect of minimizing noise and vibration caused by a collision between the housings.

[0032] Further, the present embodiment can stably support by compensating for a gap even in a case where wear occurs with the housings, thereby preventing a decrease in accuracy of a sensor for sensing a position of the rod. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 FIG. 1 is a perspective view showing a steering device according to an embodiment of the present application.

[0034] Figure 2 FIG. 3 is a cross-sectional view schematically showing a power transmission portion of the steering device according to an embodiment of the present application.

[0035] Figure 3 FIG. 4 is an exploded perspective view showing main parts of the steering device according to an embodiment of the present application.

[0036] Figure 4 FIG. 5 is a cross-sectional view showing main parts of the steering device according to an embodiment of the present application.

[0037] Figure 5 FIG. 6 is a plan view showing main parts of the steering device according to an embodiment of the present application.

[0038] Figure 6 FIG. 7 is a cross-sectional view taken along line A-A' of FIG. 6. Figure 5

[0039] Figure 7 is a sectional view taken along Figure 5 line B-B' in Fig.

[0040] Figure 8 is an exploded perspective view showing a state in which a rod, a rotation prevention portion, and a damper are combined, which are provided in a steering device according to an embodiment of the present application.

[0041] Figure 9 is a perspective assembly view of Figure 8 .

[0042] Figure 10 is a perspective view showing a magnetic bracket provided in a steering device according to an embodiment of the present application.

[0043] Figure 11 is a view showing a combination process of a magnetic bracket and a rotation prevention portion, which are provided in a steering device according to an embodiment of the present application.

[0044] Figure 12 is an exploded perspective view showing a combined state of a sensing portion and a magnetic bracket, which are provided in a steering device according to an embodiment of the present application.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 1: Steering device

[0047] 100: Housing 200: Rod

[0048] 300: Rotation prevention portion 400: Damper

[0049] 500: Magnetic bracket 600: Sensing portion DETAILED DESCRIPTION

[0050] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are provided in order to fully convey the idea of the present application to those having ordinary knowledge in the technical field to which the present application pertains. The present application is not limited only to the embodiments presented herein, but can be embodied in other forms. In the drawings, in order to clarify the present application, illustration of parts irrelevant to the description will be omitted, and the size of constituent elements can be expressed somewhat exaggerated in order to facilitate understanding.

[0051] Figure 1 is a perspective view showing a steering device according to an embodiment of the present application, Figure 2 is a sectional view schematically showing a power transmission portion of a steering device according to an embodiment of the present application, Figure 3 is an exploded perspective view showing main parts of a steering device according to an embodiment of the present application, Figure 4 is a sectional view showing main parts of a steering device according to an embodiment of the present application,Figure 5 is a plan view showing main parts of a steering device according to an embodiment of the present application, Figure 6 is a sectional view taken along Figure 5 line A-A' in FIG. 1, Figure 7 is a sectional view taken along Figure 5 line B-B' in FIG. 1, Figure 8 is an exploded perspective view showing a state in which a rod and a rotation preventing portion and a damper are combined, which are provided in a steering device according to an embodiment of the present application, Figure 9 is a perspective assembly view of Figure 8 , Figure 10 is a perspective view showing a magnetic holder provided in a steering device according to an embodiment of the present application, Figure 11 is a view showing a combining process of a magnetic holder and a rotation preventing portion, which are provided in a steering device according to an embodiment of the present application, Figure 12 is an exploded perspective view showing a combined state of a sensing portion and a magnetic holder, which are provided in a steering device according to an embodiment of the present application.

[0052] Referring to Figures 1 to 12 , a steering device 1 according to the present embodiment can include a housing 100 for accommodating a rod 200, and provided with a sensor combining portion 110; a rotation preventing portion 300 combined to the rod 200, and for limiting rotation of the rod 200; a damper 400 provided between the sensor combining portion 110 and the rotation preventing portion 300; a magnetic holder 500 combined with the rotation preventing portion 300; and a sensing portion 600 for sensing a position of a magnet 530 provided in the magnetic holder 500.

[0053] Such a steering device 1 can be provided as a steer-by-wire type steering device to steer front wheels or rear wheels. Thus, the steering device 1 can further include a driving portion 10 to generate a driving force when a rotation signal of a steering wheel is input, and a power transmission portion 20 to transmit the driving force of the driving portion 10 to the rod 200.

[0054] The driving portion 10 can receive power from a main battery (not shown), and be provided as a motor to generate a driving force based on information such as a steering angle of the rotation of the steering wheel.

[0055] The power transmission portion 20 can be provided to receive a driving force, i.e., a rotational force, from the driving portion 10, and transmit the same to the rod 200. For example, the power transmission portion 20 can include a motor pulley 21 combined to a rotational shaft 11 of the motor 10; a ball nut 22 bolted to the rod 200; a nut pulley 23 provided on the ball nut 22; and a belt 25 connecting the motor pulley 21 and the nut pulley 23; etc.

[0056] If the driving force of the driving portion 10 is transmitted to the nut pulley 23 through the belt 25, the ball nut 22 is rotated, and the rod 200 is moved in the axial direction by the rotation of the ball nut 22. In this process, the rotational motion of the driving portion 10 is converted into a translation motion. That is, by providing the rotation prevention portion 300, when the driving portion 10 transmits the driving force, it is ensured that the rod 200 does not rotate but moves in the axial direction, so that the driving force can be effectively transmitted.

[0057] The rod 200 provided to move in the axial direction is accommodated in the housing 100 to steer the wheels. At this time, both end portions of the rod 200 are connected to the front wheels or the rear wheels, and the front wheels or the rear wheels are steered as the rod 200 slides in the axial direction.

[0058] As described above, in order to determine whether the rod 200 moves to a target position or the like set by the steering hand operation of the driver during the sliding movement, a magnetic bracket 500 and a sensing portion 600 can be provided at a position for coupling the rotation prevention portion 300.

[0059] The magnetic bracket 500 and the sensing portion 600 can be provided as one sensor group assembly, and are coupled to the rotation prevention portion 300 fixed to the rod 200, thereby ensuring easy assembly. The structure of such a sensing portion 600 and a magnetic bracket 500 will be described again below.

[0060] The sensor coupling portion 110 is provided in the housing 100 to expose a portion of the rod 200 through the inner and outer sides thereof. More specifically, the sensor coupling portion 110 is formed to protrude outward from the housing 100, and has an elongated hole 120 formed in the axial direction. Accordingly, the rotation prevention portion 300 can be inserted into the elongated hole 120 and coupled to the rod 200. As the sensing portion 600 described later is assembled to the housing 100, the sensor coupling portion 110 can be closed so as not to expose the elongated hole 120 to the outside.

[0061] The elongated hole 120 can include a first elongated hole 121 for insertion of the rotation prevention portion 300, and a second elongated hole 122 formed at the outside of the first elongated hole 121 and forming a step with the first elongated hole 121.

[0062] The first elongated hole 121 can be formed to have a length longer than the length of the rotation prevention portion 300 in the axial direction. Accordingly, the rotation prevention portion 300 coupled to the rod 200 can move in the axial direction of the first elongated hole 121 within a prescribed range. At this time, the rotation prevention portion 300 can be coupled to the housing 100 at a position where the first elongated hole 121 is formed, so as to be supported by the housing 100 in the width direction. Accordingly, the rotation of the rod 200 is restricted by the rotation prevention portion 300 and moves in the axial direction.

[0063] The second long hole 122 is positioned vertically above the first long hole 121. In this second long hole 122, a magnetic bracket 500 coupled to the rotation prevention portion 300 and a portion of a sensing portion 600 guiding the magnetic bracket 500 can be inserted.

[0064] The rotation prevention portion 300 can include a support member 310 formed with at least one coupling hole 312 and coupled to the rod 200, and a fixing bolt 320 inserted into the coupling hole 312 and coupled to the rod 200.

[0065] As shown, the support member 310 includes a main body portion 311 having a prescribed length, and a coupling portion 313 protruding from the center of the main body portion 311 to one side. At this time, the coupling hole 312 can be formed on both sides of the main body portion 311 in the length direction thereof with the coupling portion 313 as a reference.

[0066] The rod 200 can be provided with a chamfered portion 210 for supporting the support member 310. The chamfered portion 210 can have a shape corresponding to the support member 310 and be flat so as to form a surface contact with the support member 310. A fixing hole 212 is formed in a position of the chamfered portion 210 corresponding to the coupling hole 312 of the support member 310. Thus, in a state in which the support member 310 is seated on the chamfered portion 210, as the fixing bolt 320 is inserted into the coupling hole 312 and bolt-coupled with the fixing hole 212, the support member 310 is fixed to the rod 200.

[0067] The main body portion 311 is positioned in a portion in which the first long hole 121 is formed, in a state in which the support member 310 is fixed to the rod 200, so as to be supported in the width direction of the case 100. Further, the coupling portion 313 can be formed with a fastening groove 314 coupled with the magnetic bracket 500 described later. Thus, the rotation prevention portion 300 can be coupled with the magnetic bracket 500 through the fastening groove 314 in a state in which it is fixed to the rod 200.

[0068] This rotation prevention portion 300 can move in the axial direction of the first long hole 121, and both side surfaces in the width direction thereof are supported by the case 100, so rotation of the rod 200 coupled with the support member 310 can be prevented.

[0069] In addition, the coupling hole 312 can be provided with a bush 330 into which the fixing bolt 320 is inserted. The bush 330 is disposed between the outer circumferential surface of the fixing bolt 320 and the inner circumferential surface of the coupling hole 312, and transmits a load to the fixing bolt 320 when a rotational torque is generated in the rod 200.

[0070] For example, in a state in which the bushing 330 is not provided, when the fixing bolt 320 is fastened to the support member 310, deformation occurs at a portion fastened with the fixing bolt 320 due to a bolt fastening force of the fixing bolt 320, and when a rotational torque of the rod 200 is generated, the support member 310 can be deformed by all forces (loads). Thus, there is a problem that a gap is easily generated with the housing 100.

[0071] Thus, according to the present embodiment, in a case in which the bushing 330 is provided to the coupling hole 312, a fastening force of the fixing bolt 320 is received by the bushing 330, and a rotational torque of the rod 200 is also received by the fixing bolt 320 fastened with the bushing 330, so that an effect of improving a breaking strength of the rotation prevention portion 300 can be achieved.

[0072] Such a rotation prevention portion 300 can be made of a steel material having rigidity so as to resist a rotational torque of the rod 200.

[0073] In addition, a gap can be generated between the support member 310 and the housing 100 due to an assembly tolerance, wear of the support member 310, or the like, and if such a gap is not compensated for, the support member 310 collides with the housing 100 and generates noise due to a road impact or the like, so that a problem of reducing a steering feeling of a driver can occur.

[0074] Further, as will be described later, the magnetic bracket 500 is coupled with the rotation prevention portion 300 and slides together with the rotation prevention portion 300, and a sensor determines a position of the rod 200 by sensing a position of the magnet 530 provided to the magnetic bracket 500, and if a gap exists between the support member 310 and the housing 100, a width direction movement of the support member 310 is transmitted to the magnet 530, so that a problem of reducing accuracy of the sensor can occur.

[0075] Thus, in order to solve the above-described problems by compensating for a gap between the support member 310 and the housing 100, the damper 400 can be provided to the support member 310.

[0076] The damper 400 can be provided between an inner side of the sensor coupling portion 110 and the rotation prevention portion 300. As illustrated, the damper 400 can be coupled to the main body portion 311 of the support member 310. The damper 400 can be made of an elastic material capable of generating an elastic force. For example, the damper 400 can be made of a rubber material.

[0077] The damper 400 can be combined to the outer side of the support member 310, and disposed in a compressed state between the support member 310 and the sensor combination part 110. Accordingly, the damper 400 can exert an elastic force in the width direction of the case 100, thereby functioning to absorb a gap caused by assembly tolerance, and to absorb deformation caused by bending of the rod 200. Further, the damper 400 can reduce noise by absorbing vibration generated by impact between the rotation preventing part 300 and the case 100, and, when a gap is generated between the support member 310 and the case 100, prevent a decrease in accuracy of the sensor by compensating for the gap.

[0078] The damper 400 can be provided with a grease pocket 410 for storing fluid. The grease pocket 410 is preferably formed in the outer side of the damper 400 to lubricate the space between the sensor combination part 110. The grease pocket 410 can also be formed only in a portion supported in the width direction of the case 100. Such a grease pocket 410 can be formed in a plurality at a prescribed interval in the outer side of the damper 400. As shown, the grease pocket 410 is shown as being formed in the vertical direction, and in a specific pattern along the outer side of the damper 400, but is not limited thereto, and can have any shape as long as it is configured to store fluid and lubricate the space between the case 100.

[0079] The magnetic bracket 500 is disposed to be combined with the rotation preventing part 300 fixed to the rod 200, and to move together with the rod 200 when the rod 200 slides. Such a magnetic bracket 500 can include a body 510, a magnet 530 fixed to the body 510, and a fastening part 520 protruding from one side of the body 510 and combined to the rotation preventing part 300.

[0080] The magnet 530 can be separately mounted to the body 510, or formed in one body with the body 510 by insert molding.

[0081] The fastening part 520 can be formed at a position corresponding to the fastening groove 314 formed in the combination part 313 of the rotation preventing part 300. That is, the fastening part 520 can be formed to protrude from the magnetic bracket 500 toward the rotation preventing part 300.

[0082] The fastening portion 520 can be provided to have a spherical shape with its outer side surface formed as a curved surface, and be inserted into the fastening groove 314. Also, one side surface of the magnetic bracket 500 and the other side surface of the rotation prevention portion 300 are spaced apart by a predetermined distance, and the magnetic bracket 500 and the rotation prevention portion 300 can be relatively rotated in a state in which the fastening portion 520 is inserted into the fastening groove 314. That is, the rod 200 can be bent due to a road impact or the like, and in order to prevent the magnetic bracket 500 from moving due to the bending of the rod 200 and thus the accuracy of the sensor from being reduced, the magnetic bracket 500 and the rotation prevention portion 300 are relatively rotated to offset the bending of the rod 200.

[0083] Also, a cutout groove 522 can be provided at the center of the fastening portion 520, and the cutout groove 522 can be formed to be cut in a direction orthogonal to the axial direction of the rod 200. The cutout groove 522 can be formed to the bottom of the fastening portion 520.

[0084] The fastening portion 520 having the cutout groove 522 at the center thereof has a pair of fastening bodies 524 formed at both sides of the cutout groove 522 and having a substantially hemispherical shape. The pair of fastening bodies 524 can be elastically bent to the cutout groove 522 side in a case in which an external force is applied.

[0085] The fastening portion 520 can be provided to have an outer diameter greater than the diameter of the fastening groove 314. Thus, when the fastening portion 520 is assembled to the fastening groove 314, the fastening portion 520 can be deformed to the cutout groove 522 while being pressed to the inside of the fastening groove 314. Thus, in a state in which the fastening portion 520 is pressed to the inside of the fastening groove 314, the fastening portion 520 can be maintained in a stable combined state in the fastening groove 314 as the pair of fastening bodies 524 apply a restoring force in a direction in which they are apart from each other.

[0086] Thus, the fastening portion 520 can not only be rotated in a state in which it is elastically attached to the fastening groove 314, but also be formed to be movable (freely moveable) in a direction orthogonal to the axial direction of the rod 200, so that even if the bending of the rod 200 or a road impact or the like occurs, a combined state can be maintained, and the reduction in the sensing accuracy between the magnetic bracket 500 and the sensing portion 600 can be prevented.

[0087] The magnetic bracket 500 can further include support portions 511 and 512 protruding from both sides in the width direction thereof to be combined with the sensing portion 600. The support portions 511 and 512 can be formed to be spaced apart in the vertical direction so as to be supported and guided by a guide 620 of the sensing portion 600, which will be described later. For example, the support portions 511 and 512 can include a first support portion 511 and a second support portion 512.

[0088] The sensing portion 600 can include a sensor housing 610 provided with a sensor for sensing the position of the magnet 530, and a pair of guides 620 provided at one side of the sensor housing 610 and guiding the magnetic bracket 500.

[0089] The sensor housing 610 is coupled to the outside of the sensor coupling portion 110 to enclose the sensor coupling portion 110.

[0090] The pair of guides 620 can be formed at the lower side of the sensor housing 610, spaced apart in the width direction and extending in the axial direction so as to be inserted into the sensor coupling portion 110. Such a pair of guides 620 can be positioned in the second long hole 122 and coupled with the magnetic bracket 500.

[0091] The pair of guides 620 can be protrusively provided, thereby forming a guide hole 622 extending in the length direction between the lower portions of the pair of guide sensor housings 610. Accordingly, the first support portion 511 formed at both sides in the width direction of the magnetic bracket 500 can be clamped in and coupled with the guide hole 622. Further, the second support portion 512 can be supported by the guide 620 positioned at the other side of the guide hole 622. Accordingly, when the magnetic bracket 500 moves, the first support portion 511 and the second support portion 512 can be guided with the pair of guides 620 and can stably move. That is, the guides 620 are provided between the first support portion 511 and the second support portion 512, thereby the magnetic bracket 500 is guided along the guides 620, so as to slide only in the axial direction. Such a first support portion 511 and a second support portion 512 can be formed long in the axial direction or a plurality of them can be formed spaced apart in the axial direction, so as to prevent the magnetic bracket 500 from wandering.

[0092] In addition, the first support portion 511 can be provided in a wedge shape having an inclined one side surface, thereby being easily inserted into the guide hole 622 and being stably supported by the guide 620 after being inserted into the guide hole 622.

[0093] The second support portion 512 can be formed long in the axial direction. Accordingly, the area in which the second support portion 512 is supported by the guide 620 is widened, so as to effectively prevent the magnetic bracket 500 from wandering.

[0094] As described above, according to the structure of the steering apparatus of the present embodiment, the rotational torque generated by the sliding of the rod 200 compensates for the gap caused by the wear occurring at the rotation prevention portion 300, so as to reduce noise and not only accurately sense the position of the rod 200 but also effectively prevent the sensor accuracy from being reduced due to the wandering or bending of the rod 200.

[0095] While the present application has been described with respect to the limited embodiments and drawings, it should be understood that the present application is not limited to them but can be variously modified and changed by those skilled in the art within the technical idea and the scope of the following claims.

Claims

1. A steering device characterized by comprising: Comprising: a housing for accommodating a rod slidable in an axial direction to turn a wheel, and provided with a sensor coupling portion penetrating an inner side surface and an outer side surface of the housing to expose a part of the rod; a rotation preventing portion coupled to the rod through the sensor coupling portion and moved together with the rod, the rotation preventing portion being supported in a width direction of the housing to restrict rotation of the rod; a damper coupled to the rotation preventing portion in a manner of being disposed between the sensor coupling portion and the rotation preventing portion; a magnetic bracket coupled to the rotation preventing portion and moved together with the rod, and having a magnet; and a sensing portion including a sensor coupled to the sensor coupling portion and used to sense a position of the magnet, the rotation preventing portion including: a support member formed with at least one coupling hole; and a fixing bolt inserted into the coupling hole and coupling the support member to the rod, the damper being coupled to an outer side surface of the support member and including a grease cavity for storing fluid to lubricate a space between the damper and the sensor coupling portion. 2.The steering apparatus according to claim 1, wherein a chamfer portion is provided at the rod, and the support member is seated in contact with an upper side of the chamfer portion. 3.The steering apparatus according to claim 1, wherein the support member has a coupling portion protruding upward at a center of the support member, the coupling hole is formed at both axial sides of the support member. 4.The steering apparatus according to claim 3, wherein a fastening groove for coupling with the magnetic bracket is formed at the coupling portion. 5.The steering apparatus according to claim 1, wherein a bushing is provided at the coupling hole. 6.The steering apparatus according to claim 1, wherein the damper is provided in a compressed state between the support member and the sensor coupling portion. 7.The steering apparatus according to claim 1, wherein a plurality of the grease cavities are formed at a prescribed interval at an outer side surface of the damper. 8.The steering apparatus according to claim 1, wherein the sensor coupling portion has an elongated hole formed in an axial direction of the rod, the elongated hole includes: a first elongated hole into which the rotation preventing portion is inserted; and a second elongated hole formed at an outer peripheral surface side of the first elongated hole and formed in steps with the first elongated hole, a part of the sensing portion being inserted into and coupled to the second elongated hole. 9.The steering apparatus according to claim 1, wherein the magnetic bracket includes: a body, a magnet fixed to the body, and a fastening portion protruding from a lower portion of the body and coupled to the rotation preventing portion; a fastening groove for inserting the fastening portion is formed at the rotation preventing portion. 10.The steering apparatus according to claim 9, wherein the fastening portion is formed in a spherical shape having a diameter larger than a diameter of the fastening groove, and a vertical direction formed notch groove is provided at a center of the fastening portion. ​ ​ The fastening part is deformed and pressed into the fastening groove by the notched groove.

11. The steering device according to claim 1, characterized in that, The sensing unit includes: The sensor housing is joined to the sensor junction to seal the sensor junction, and A pair of guides are formed on the underside of the sensor housing that is inserted into the sensor joint, and are spaced apart in the width direction of the housing and formed along the axial direction of the rod; The magnetic support is supported and moved between the pair of guides.

12. A steering device characterized by comprising: include: A housing for accommodating a rod and having a sensor engagement portion, the rod being slidable axially to steer a wheel, the sensor engagement portion penetrating the inner and outer sides of the housing to expose a portion of the rod; A rotation prevention part is attached to the rod via the sensor coupling part and moves together with the rod. The rotation prevention part is supported in the width direction of the housing to limit the rotation of the rod. A damper is coupled to the rotation prevention part in such a way that it is disposed between the sensor joint and the rotation prevention part; A magnetic support is attached to the rotation prevention part in a freely movable manner and moves together with the rod, and has a magnet; as well as The sensing unit includes a sensor, which is coupled to the sensor coupling and used to sense the position of the magnet. The rotation prevention part includes: The supporting member has at least one connecting hole; as well as A fixing bolt is inserted into the connecting hole to attach the support member to the rod. The damper is attached to the outer side of the support member and includes a grease cavity for storing fluid to lubricate the space between the damper and the sensor junction.

13. The steering device according to claim 12, characterized in that, The magnetic support includes: ontology, A magnet, fixed to the body, and A spherical fastening part is inserted into and disposed in the fastening groove of the rotation prevention part. The fastening part can rotate a predetermined angle within the fastening groove with the center of the fastening part as a reference, and can move within the fastening groove in a direction orthogonal to the axis of the rod.

14. The steering device according to claim 13, characterized in that, The magnet is integrally formed with the body through an embedded molding process.

15. The steering device according to claim 12, characterized in that, The sensing unit includes: The sensor housing is joined to the sensor junction to seal the sensor junction, and A pair of guides are formed on the underside of the sensor housing that is inserted into the sensor joint, and are spaced apart in the width direction of the housing and formed along the axial direction of the rod; The magnetic bracket has support portions on both sides in its width direction, and the support portions are supported between the pair of guide members. The magnetic support moves between the pair of guides.

16. The steering device according to claim 15, characterized in that, The pair of guides each includes a guide hole formed along its length. The support portion includes: A first support portion is inserted into and supported by the guide hole; and The second support is supported by the guide.

17. The steering device according to claim 16, characterized in that, At least one of the first support portion and the second support portion is divided into multiple parts in the length direction.

18. The steering device according to claim 16, characterized in that, The first support portion is formed in the shape of a wedge with an inclined side.

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