Steering apparatus for vehicle

Abstract

The present disclosure provides a steering apparatus for a vehicle, including: a housing; an input shaft member rotatably mounted in the housing; the conversion guide part is arranged on the input shaft part and is used for guiding the input shaft part to do linear motion in the shell; and a reaction force member for adjusting a steering reaction force of the input shaft member while providing an elastic force to the input shaft member. According to the present disclosure, even without a decelerator, a driver can steer a vehicle when sufficiently feeling a steering reaction force generated by an elastic force generated by compression of an elastic member.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure relate to a steering device for a vehicle, and more particularly, to a steering device for a vehicle that enables a driver to feel a steering reaction force when the vehicle is steered. Background Art

[0002] A steer-by-wire (SBW) system refers to a steering device that is operated by an electrical signal between a column connected to a steering wheel and an actuator that can steer wheels, without a mechanical connection.

[0003] A steering feedback actuator (SFA) is a device that can provide a reaction force to a driver through a steering wheel by changing the torque at each vehicle speed using a motor and a reducer.

[0004] Since the steering reaction force generated by the straightness of the vehicle and the fluctuation of the toe angle transmitted by the tires during steering cannot be transmitted to the driver when applying SBW, the SFA needs to arbitrarily control the motor to make the steering wheel lighter at low speeds and heavier at high speeds.

[0005] For this reason, a reaction force actuator assembly including a motor and a reducer needs to be provided. However, due to the adoption of the reaction force actuator, there are problems of increased manufacturing cost and weight of the steering device. Therefore, this problem needs to be solved.

[0006] The background art of the present disclosure is disclosed in Korean Patent Application Publication No. 10-2167914 (registered on October 14, 2020, titled "Vehicle Steering Device"). Summary of the Invention

[0007] A reaction force component that adjusts the steering reaction force of an input shaft component while providing an elastic force to the input shaft component. Embodiments of the present disclosure relate to a steering device for a vehicle that enables a driver to feel a steering reaction force when the vehicle is steered.

[0008] In an embodiment of the present disclosure, a steering device for a vehicle according to the present disclosure includes: a housing; an input shaft component rotatably installed in the housing; a conversion guide component installed on the input shaft component and configured to guide the input shaft component to move linearly in the housing; and a reaction force component configured to provide an elastic force to the input shaft component while adjusting the steering reaction force of the input shaft component.

[0009] The reaction force component may include: a motor including a motor shaft component; a nut component connected to the motor shaft component and configured to move by rotation of the motor shaft component; and an elastic component interpolated between the nut component and the input shaft component and configured to elastically deform due to the movement of the nut component and the input shaft component.

[0010] The nut component may include: a nut main body component fixed to the motor shaft component by a screw and configured to move according to the rotation of the motor shaft component; a nut pressing component configured to press the elastic component while moving according to the movement of the nut main body component; and a nut interpolation portion mounted on the motor shaft component and disposed between the nut main body component and the nut pressing component.

[0011] The nut main body component may include: a nut main body moving portion fixed to the motor shaft component by a screw; and a nut rotation limiting portion protruding outward from the nut main body moving portion and configured to be adjacent to the inner side of the housing to limit the rotation of the nut main body moving portion.

[0012] The nut pressing component may include: a nut pressing moving portion having a central portion into which the motor shaft component is inserted; and a nut pressing rotation limiting portion protruding outward from the nut pressing moving portion and configured to be adjacent to the inner side of the housing to limit the rotation of the nut pressing moving portion.

[0013] The nut pressing rotation limiting portion may be configured to move toward the elastic component when pressed by the nut rotation limiting portion.

[0014] The nut pressing component may further include a nut peak / valley portion having peaks and valleys formed on a surface of the nut pressing moving portion relative to the nut interpolation portion.

[0015] The nut interpolation portion may include: a nut interpolation main body portion mounted on the motor shaft component and interpolated between the nut main body component and the nut pressing component; and a nut interpolation protruding portion protruding from the nut interpolation main body portion and configured to be rotatable in a state where the nut interpolation protruding portion is adjacent to the nut peak / valley portion.

[0016] The nut interpolation portion may include: a plurality of nut interpolation portions protruding from the nut interpolation main body portion toward the input shaft component; and a nut interpolation fastening portion fixed to the input shaft component.

[0017] The conversion guiding member may include: a first conversion guiding member adjacent to the elastic member and receiving an elastic force from the elastic member; a second conversion guiding member spaced apart from the first conversion guiding member and for rotatably mounting the input shaft member thereon; and a conversion rotation limiting member for connecting the first conversion guiding member and the second conversion guiding member and limiting the rotation angle of the input shaft member.

[0018] The conversion guiding member may further include a plurality of conversion protrusion portions respectively protruding from the first conversion guiding member and the second conversion guiding member and inserted into the inner surface of the housing.

[0019] The input shaft member may include: an input shaft rotatably mounted on the second conversion guiding member; and an input protrusion portion protruding from an outer surface of the input shaft and for moving between the first conversion guiding member and the second conversion guiding member, the input protrusion portion being configured to be caught by the conversion rotation limiting member to limit movement of the input protrusion portion.

[0020] The input shaft member may further include an input fastening member mounted at an end of the input shaft and fixed to the nut insertion fastening portion.

[0021] The input fastening member may include: an input fastening base portion spaced apart from the input protrusion portion; a plurality of input fastening coupling portions protruding from one side of the input fastening base portion and fixed to the nut insertion fastening portion; and an input fastening elastic portion inserted between the input fastening base portion and the input protrusion portion and configured to elastically deform.

[0022] The input fastening member may further include an input fastening fixing portion protruding from the other side of the input fastening base portion and configured to selectively couple with the input protrusion portion during movement.

[0023] The steering device may further include: a sensor member for measuring a rotation angle of the input shaft member.

[0024] The sensor member may include a torque and angle sensor (TAS) for measuring a torque amount of the input shaft and a rotation angle of the input protrusion portion.

[0025] The sensor member may include a linear sensor for measuring a position of the input protrusion portion.

[0026] According to the steering device for a vehicle of the present disclosure, a driver can fully feel the steering reaction force when steering the vehicle even without a speed reducer by means of the compression elastic force of an elastic member.

[0027] In addition, according to the present disclosure, by using a small motor component and a nut component, the compression length of the elastic member can be adjusted according to the vehicle speed, thereby controlling the reaction force.

[0028] In addition, according to the present disclosure, there is no need to use a basic speed reducer and a large motor. By simplifying the component parts with the elastic member and the small motor component, the manufacturing cost can be reduced and the production efficiency can be improved. Brief Description of the Drawings

[0029] Figure 1 is a perspective view for schematically showing a complete steering device for a vehicle according to an embodiment of the present disclosure.

[0030] Figure 2 is a perspective view for schematically showing a steering device for a vehicle according to an embodiment of the present disclosure.

[0031] Figure 3 is a perspective view for schematically showing a main configuration of a steering device for a vehicle when observed in one direction according to an embodiment of the present disclosure.

[0032] Figure 4 is an assembly perspective view for schematically showing a steering device for a vehicle according to an embodiment of the present disclosure.

[0033] Figure 5 is a front view for schematically showing a main configuration of a steering device for a vehicle according to an embodiment of the present disclosure.

[0034] Figure 6 is a perspective view for schematically showing a main configuration of a steering device for a vehicle when observed in other directions according to an embodiment of the present disclosure.

[0035] Figure 7 is a perspective view for schematically showing a normal operation mode of a vehicle in a main configuration of a steering device for a vehicle according to an embodiment of the present disclosure.

[0036] Figure 8 is a front view for schematically showing a normal operation mode of a vehicle in a main configuration of a steering device for a vehicle according to an embodiment of the present disclosure.

[0037] Figure 9 is a perspective view for schematically showing a low-speed operation mode of a vehicle in a main configuration of a steering device for a vehicle according to an embodiment of the present disclosure.

[0038] Figure 10 It is a front view for schematically showing a vehicle low-speed operation mode in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure.

[0039] Figure 11 It is a perspective view for schematically showing a high-speed operation mode of a vehicle in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure.

[0040] Figure 12 It is a front view for schematically showing a high-speed operation mode of a vehicle in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure.

[0041] Figure 13 It is a perspective view for schematically showing an input shaft component of a steering device for a vehicle according to an embodiment of the present disclosure.

[0042] Figure 14 It is an assembled perspective view for schematically showing an input shaft component of a steering device for a vehicle according to an embodiment of the present disclosure.

[0043] Figure 15 It is an assembled front view for schematically showing an input shaft component of a steering device for a vehicle according to an embodiment of the present disclosure.

[0044] Figure 16 It is an exploded front view for schematically showing an input shaft component of a steering device for a vehicle according to an embodiment of the present disclosure. Detailed Description of the Invention

[0045] Hereinafter, a steering device for a vehicle will be described with reference to the accompanying drawings through various exemplary embodiments. Here, for the sake of clarity and convenience of description, the thickness of the lines schematically shown in the drawings, the dimensions of the components, or the like may be enlarged.

[0046] In addition, the terms used hereinafter are defined in consideration of their functions in the present disclosure, and may vary depending on the intention or common practice of the user or operator. Therefore, these terms should be defined based on the entire content of this specification.

[0047] Figure 1 It is a perspective view for schematically showing a complete steering device for a vehicle according to an embodiment of the present disclosure, Figure 2 It is a perspective view for schematically showing a steering device for a vehicle according to an embodiment of the present disclosure, Figure 3 It is a perspective view for schematically showing the main configuration of a steering device for a vehicle when observed in one direction according to an embodiment of the present disclosure, Figure 4 It is an assembled perspective view for schematically showing a steering device for a vehicle according to an embodiment of the present disclosure.Figure 5 is a front view of the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 6 is a perspective view for schematically showing the main configuration of a steering device for a vehicle when observed in other directions according to an embodiment of the present disclosure, Figure 7 is a perspective view for schematically showing the normal operation mode of a vehicle in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 8 is a front view for schematically showing the normal operation mode of a vehicle in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 9 is a perspective view for schematically showing the low-speed operation mode of a vehicle in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 10 is a front view for schematically showing the low-speed operation mode of a vehicle in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 11 is a perspective view for schematically showing the high-speed operation mode of a vehicle in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 12 is a front view for schematically showing the high-speed operation mode of a vehicle in the main configuration of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 13 is a perspective view for schematically showing an input shaft component of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 14 is an assembled perspective view for schematically showing an input shaft component of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 15 is an assembled front view for schematically showing an input shaft component of a steering device for a vehicle according to an embodiment of the present disclosure, Figure 16 is an exploded front view for schematically showing an input shaft component of a steering device for a vehicle according to an embodiment of the present disclosure. For ease of description, Figures 7 to 12 the nut body component 421 is not shown. The detailed structure of the nut body component 421 can be identified from Figure 3 , 4 , 6, etc.

[0048] Referring to Figures 1 to 16 , a steering device for a vehicle according to an embodiment of the present disclosure may include a housing 100, an input shaft component 200, a conversion guide component 300, and a reaction force component 400.

[0049] The input shaft component 200, the conversion guide component 300, the reaction force component 400, etc. may be accommodated or installed in the housing 100.

[0050] The input shaft component 200 can be rotatably mounted in the housing 100. The input shaft component 200 can be connected to a steering wheel (not shown in the figure) and rotate when the driver manually turns the steering wheel or when the steering wheel is automatically steered in an autonomous vehicle.

[0051] The input shaft component 200 can include an input shaft 210 and an input protrusion portion 220. The input shaft 210 can be rotatably mounted on a second conversion guide component 320 of the conversion guide component 300.

[0052] The input shaft 210 can be rod-shaped and connected to the steering wheel. When the driver manually turns the steering wheel or when the steering wheel is automatically turned in an autonomous vehicle, the input shaft 210 can rotate accordingly.

[0053] The input protrusion portion 220 can be annular and disposed around the outer surface of the input shaft 210. The input protrusion portion 220 can be disposed between a first conversion guide component 310 and a second conversion guide component 320 of the conversion guide component 300.

[0054] The input protrusion portion 220 can rotate and move along a path P along which the input protrusion portion 220 can move.

[0055] The input protrusion portion 220 can rotate in conjunction with the rotation of the input shaft 210. When the input protrusion portion 220 rotates due to the rotation of the input shaft 210, the rotation of the input protrusion portion 220 can be restricted because the input protrusion portion 220 is caught by the conversion rotation limiting component 330. When the rotation of the input protrusion portion 220 is restricted because the input protrusion portion 220 is caught by the conversion rotation limiting component 330, the rotation angle of the input shaft 210 can be restricted. In the present disclosure, the rotation angle of the input shaft 210 can be set to 0 to ±150°.

[0056] The input protrusion portion 220 can include an input protrusion main body portion 221, an input protrusion protruding portion 223, and an input protrusion fastening portion 225. The input protrusion main body portion 221 can be annular and mounted on the periphery of the input shaft 210. The input protrusion portion 220 can move and rotate between a first conversion guide component 310 and a second conversion guide component 320 of the conversion guide component 300.

[0057] The input protrusion protruding portion 223 can protrude from the outer surface of the input protrusion main body portion 221. The input protrusion protruding portion 223 can be disposed between the first conversion guide component 310 and the second conversion guide component 320 and move along a path P along which the input protrusion protruding portion 223 moves between the first conversion guide component 310 and the second conversion guide component 320, while rotating with the rotation of the input shaft 210.

[0058] The input protrusion fastening portion 225 can be integrated with the input protrusion main body portion 221. The input protrusion fastening portion 225 can protrude from the input protrusion main body portion 221 to face the input fastening fixed portion 237 of the input fastening member 230.

[0059] The input protrusion fastening portion 225 can be fixed to the input fastening fixed portion 237 of the input fastening member 230. The inner circumferential surface of the input protrusion fastening portion 225 can form a shape corresponding to the shape of the input fastening fixed portion 237.

[0060] The input protrusion fastening portion 225 is fixed to the input fastening fixed portion 237 of the input fastening member 230 and transmits the power of the motor member 410 to the input shaft 210, so that the input shaft 210 can rotate by the operation of the motor member 410, and when the motor member 410 stops operating, the input shaft 210 may also not rotate.

[0061] When the input protrusion fastening portion 225 and the input fastening fixed portion 237 are not fastened, the power of the motor member 410 is not transmitted to the input shaft 210. That is, the disconnection between the input protrusion portion 220 and the input fastening member 230 cuts off the power transmission from the motor member 410 to the input shaft 210.

[0062] The input shaft member 200 may further include an input fastening member 230. The input fastening member 230 can be installed at one end of the input shaft 210 (based on Figure 4 the left end) and fastened to the nut insertion fastening portion 423c of the nut insertion portion 423.

[0063] The input fastening member 230 can include an input fastening base portion 231, an input fastening coupling portion 233, and an input fastening elastic portion 235.

[0064] The input fastening base portion 231 can be annular. The input fastening base portion 231 can be spaced apart from the input protrusion portion 220. The input fastening base portion 231 can be installed at one end of the input shaft 210 (based on Figure 14 the left end).

[0065] The input fastening coupling portion 233 can be a plurality of input fastening coupling portions 233 protruding from one side of the input fastening base portion 231 (based on Figure 4 and Figure 14 the left side) and fastened to the nut insertion fastening portion 423c of the nut insertion portion 423. Therefore, the rotational power of the motor member 410 can be transmitted to the input protrusion portion 220.

[0066] The input fastening coupling part 233 is fastened to the nut insertion fastening part 423c of the nut insertion part 423, and transmits the power of the motor part 410 to the input shaft 210, so that the input shaft 210 can rotate with the operation of the motor part 410 and the input shaft 210 can stop rotating when the motor part 410 stops.

[0067] When the input projection fastening part 225 and the input fastening fixing part 237 are selectively fastened, the power of the motor part 410 can be selectively transmitted to the input shaft 210. When the input projection fastening part 225 and the input fastening fixing part 237 are fastened in the state of fastening the input fastening coupling part 233 and the nut insertion fastening part 423c, the power of the motor part 410 can be transmitted to the input shaft 210. When the input projection fastening part 225 and the input fastening fixing part 237 are loosened in the state of fastening the input fastening coupling part 233 and the nut insertion fastening part 423c, the power of the motor part 410 will not be transmitted to the input shaft 210.

[0068] The selective fastening between the input projection fastening part 225 and the input fastening fixing part 237 can be controlled by adjusting the moving amount of the nut body part 421 on the motor shaft part 411.

[0069] The input fastening elastic part 235 can be inserted between the input fastening base part 231 and the input projection part 220 and can be elastically deformed.

[0070] The input fastening elastic part 235 can be elastically deformed between the input fastening base part 231 and the input projection part 220 by the movement of the input fastening base part 231 and the movement of the input projection main body part 221 of the input projection part 220. That is to say, the input fastening elastic part 235 can be elastically deformed due to the change of the relative distance between the input fastening base part 231 and the input projection main body part 221. The input fastening elastic part 235 can be a helical spring.

[0071] When the nut body part 421 moves toward the input projection main body part 221 by the rotation of the motor part 410, the input fastening elastic part 235 is compressed and deformed, and the input projection fastening part 225 and the input fastening fixing part 237 are engaged with each other. If the power supply of the motor part 410 is cut off, the input fastening elastic part 235 will return to the initial state, so that the input projection fastening part 225 and the input fastening fixing part 237 will be loosened.

[0072] The input fastening part 230 may further include an input fastening fixing part 237. The input fastening fixing part 237 can be from the other side of the input fastening base part 231 (based on Figure 14protrudes on the right side) and is coupled to the input protrusion portion 220 when moving.

[0073] The input fastening fixing portion 237 can be fastened to the input protrusion fastening portion 225 of the input protrusion portion 220, so that the input shaft 210 does not rotate when the motor component 410 stops. In the state where the input fastening fixing portion 237 and the input protrusion fastening portion 225 are fastened, the operation of the motor component 410 is transmitted to the input shaft 210 in a sound manner. That is, when the motor component 410 rotates, the input shaft 210 also rotates, and when the motor component 410 stops, the input shaft 210 also stops.

[0074] The conversion guide member 300 can be mounted on the input shaft member 200 and can guide the rotating input shaft member 200 so that the rotating input shaft member 200 moves linearly in the housing 100.

[0075] The conversion guide member 300 may include a first conversion guide member 310, a second conversion guide member 320, and a conversion rotation limiting member 330. The first conversion guide member 310 may be adjacent to the elastic member 430 of the reaction force member 400 and is provided with an elastic force by the elastic member 430. The first conversion guide member 310 can be adjacent to the elastic member 430 of the reaction force member 400 and has an elastic force for the elastic member 430 to be compressed and deformed, so that the first conversion guide member 310 can adjust the reaction force of the input shaft member 200. The first conversion guide member 310 can be formed in a hollow shape.

[0076] The second conversion guide member 320 can be spaced from the first conversion guide member 310, and the input shaft member 200 can be rotatably mounted on the second conversion guide member 320. The second conversion guide member 320 can be formed in a hollow shape so that the input shaft 210 of the input shaft member 200 is mounted on the second conversion guide member 320. The inner diameter of the second conversion guide member 320 is larger than the outer diameter of the input shaft 210, so that the input shaft 210 of the input shaft member 200 can rotate.

[0077] The conversion rotation limiting member 330 can connect the first conversion guide member 310 and the second conversion guide member 320 and limit the rotation angle of the input shaft member 200. When the input protrusion portion 220 of the input shaft member 200 moves along the path P formed between the first conversion guide member 310 and the second conversion guide member 320, it will be caught by the conversion rotation limiting member 330, thereby limiting the rotation angle of the input shaft 210 of the input shaft member 200. The rotation angle of the input shaft 210 of the input shaft member 200 can be set according to the width of the conversion rotation limiting member 330.

[0078] The input projection 220 can move and rotate simultaneously between the first conversion guide member 310 and the second conversion guide member 320. The movement path P of the input projection 220 between the first conversion guide member 310 and the second conversion guide member 320 can be formed along an oblique line direction (see Figure 5 ). Referring to Figure 5 , the movement path P of the input projection 220 can be formed as an oblique line that slopes from right to left along the left / upward direction. Therefore, as the rotation angle of the input projection 220 increases, the distance that the input projection 220 moves also increases.

[0079] In the present disclosure, the conversion guide member 300 may further include a conversion projection 340. The conversion projection 340 can protrude from the first conversion guide member 310 and the second conversion guide member 320 respectively, and be inserted into the inner surface of the housing 100. The conversion projection 340 can be inserted and mounted on the inner surface of the housing 100 to prevent the first conversion guide member 310 and the second conversion guide member 320 from rotating. The rotation of the first and second conversion guide members 310 and 320 is hindered, so the first and second conversion guide members 310 and 320 can be fixed at the position of the conversion rotation limiting member 330 that limits the rotation angle of the input shaft member 200.

[0080] The reaction force member 400 can adjust the steering reaction force of the input shaft member 200 while providing an elastic force to the input shaft member 200. The reaction force member 400 can adjust the elastic force provided to the input shaft member 200 according to the speed of the vehicle, thereby adjusting the steering reaction force of the input shaft member 200.

[0081] The reaction force member 400 may include a motor member 410, a nut member 420, and an elastic member 430. The motor member 410 can have a motor shaft member 411 and rotate it. In the present disclosure, the motor member 410 can adjust the compressive deformation of the elastic member 430 by operating the nut member 420 connected to the motor shaft member 411. A motor with a capacity smaller than that of the motors in the prior art can be used as the motor member 410.

[0082] The outer surface of the motor shaft member 411 can be formed with threads so that the motor shaft member 411 can be fixed to the nut member 420 by screws.

[0083] The nut member 420 can be connected to the motor shaft member 411 of the motor member 410 and move by the rotation of the motor shaft member 411. The nut member 420 may include a nut main body member 421, a nut projection member 423, and a nut pressing member 425.

[0084] The nut main body component 421 can be fixed to the motor shaft component 411 by screws and move by the rotation of the motor shaft component 411. The nut main body component 421 may include a nut main body moving part 421a and a nut rotation limiting part 421b.

[0085] The nut main body moving part 421a can be fixed to the motor shaft component 411 by screws. The inner surface of the nut main body moving part 421a may form a thread and be fixed to the motor shaft component 411 by screws.

[0086] The nut rotation limiting part 421b can protrude from the side surface of the nut main body moving part 421a and be adjacent to the inner side of the housing 100, thereby limiting the rotation of the nut main body moving part 421a. The nut rotation limiting part 421b can be adjacent to the inner side of the housing 100, so that the nut main body moving part 421a rotated by the rotation of the motor shaft component 411 can move linearly and horizontally in the housing 100.

[0087] At least one nut rotation limiting part 421b can protrude from the side surface of the nut main body moving part 421a toward the nut pressing component 425. The nut rotation limiting part 421b can protrude from two opposite surfaces of the nut main body moving part 421a.

[0088] The nut insertion part 423 may include a nut insertion main body part 423a and a nut insertion protrusion part 423b. The nut insertion main body part 423a can be installed on the motor shaft component 411 and inserted between the nut main body component 421 and the nut pressing component 425.

[0089] By the rotation of the motor shaft component 411, the nut insertion part 423 can rotate at the same rotation angle as the motor shaft component 411. The nut insertion part 423 can rotate at an appropriate position on the motor shaft component 411 without reciprocating between the motor component 410 and the nut pressing component 425.

[0090] The nut insertion protrusion part 423b can protrude from the nut insertion main body part 423a and move along the nut peak / valley part 425c while rotating at an appropriate position on the motor shaft component 411. When the nut insertion protrusion part 423b moves along the nut peak / valley part 425c, the amount by which the nut pressing component 425 compresses the elastic component 430 can be adjusted.

[0091] The nut pressing component 425 can compress the elastic component 430 while the nut main body component 421 moves.

[0092] The nut pressing member 425 may include a nut pressing moving part 425a and a nut pressing rotation limiting part 425b. A central part of the nut pressing moving part 425a may be formed in a hollow shape, into which the motor shaft member 411 is inserted.

[0093] The nut rotation limiting part 425b may protrude from a side surface of the nut pressing moving part 425a and be adjacent to the inner side of the housing 100, thereby limiting the rotation of the nut pressing moving part 425a.

[0094] The nut rotation limiting part 425b may be adjacent to the inner side of the housing 100, so that the nut pressing moving part 425a can move linearly and horizontally in the housing 100.

[0095] At least one nut pressing rotation limiting part 425b may protrude from a side surface of the nut pressing moving part 425a. The nut pressing rotation limiting part 425b may protrude from two opposite surfaces of the nut pressing moving part 425a.

[0096] The nut rotation limiting part 425b may move toward the elastic member 430 by the movement of the nut rotation limiting part 421b. The extrusion of the nut rotation limiting part 425b on the elastic member 430 may be adjusted by the nut rotation limiting part 421b and / or the nut insertion protrusion part 423b.

[0097] The nut pressing member 425 may further include a nut peak / valley part 425c. The nut peak / valley part 425c may have peaks and valleys formed on a surface of the nut pressing moving part 425a opposite to the nut insertion protrusion part 423b.

[0098] Refer to Figure 7 、 Figure 9 and Figure 11 , the peaks of the nut peak / valley part 425c are formed in the horizontal direction of the nut pressing moving part 425a, and the valleys are formed in the up / down direction. When the nut insertion protrusion part 423b moves along and abuts against the peaks and valleys of the nut peak / valley part 425c, the pressing amount of the elastic member 430 can be adjusted.

[0099] That is, when the nut insertion protrusion part 423b rotating at an appropriate position abuts against the nut peak / valley part 425c, the pressing amount of the elastic member 430 increases (see Figure 11 ), and when the nut insertion protrusion part 423b abuts against the nut peak / valley part 425c, the pressing amount of the elastic member 430 relatively decreases (see Figure 7 ).

[0100] Figure 7 and Figure 8Illustrates the normal operating mode of the vehicle. With the nut insertion projection portion 423b inclined at approximately 45 degrees, the nut insertion projection portion 423b can be arranged on the nut peak / valley portion 425c. That is to say, the nut insertion projection portion 423b can be set at the midpoint between the peaks / valleys of the nut peak / valley portion 425c.

[0101] The nut insertion projection portion 423b can rotate on the nut peak / valley portion 425c. The rotation of the nut insertion projection portion 423b can cause the nut pressing member 425 to move to press the elastic member 430, and the pressed elastic member 430 can be compressed.

[0102] Figure 9 and Figure 10 Illustrates the low-speed operating mode of the vehicle. The nut insertion projection portion 423b can be set on the valley of the nut peak / valley portion 425c in a state where the nut insertion projection portion 423b is inclined at 0 degrees (upward / downward arrangement state). Therefore, the compressive deformation of the elastic member 430 in the low-speed operating mode of the vehicle is less than the compressive deformation of the elastic member 430 in the normal operating mode of the vehicle.

[0103] In the low-speed operating mode of the vehicle, the amount of compressive deformation of the elastic member 430 can be reduced to reduce the reaction force of the input shaft member 200 and make the adjustment of the steering wheel easier.

[0104] Figure 11 and Figure 12 Illustrates the high-speed operating mode of the vehicle. In a state where the nut insertion projection portion 423b is inclined at 90 degrees (left / right arrangement state), the nut insertion projection portion 423b can be set on the peak of the nut peak / valley portion 425c. Therefore, the compressive deformation of the elastic member 430 in the high-speed operating mode of the vehicle is greater than the compressive deformation of the elastic member 430 in the normal operating mode of the vehicle.

[0105] In the high-speed operating mode of the vehicle, the amount of compressive deformation of the elastic member 430 can be increased to increase the reaction force of the input shaft member 200 and make the adjustment of the steering wheel heavier.

[0106] When the nut insertion projection portion 423b moves the nut pressing member 425 to compress the elastic member 430 to the maximum, the input projection fastening portion 225 can be fastened to the input fastening fixed portion 237 of the input fastening member 230. Since the power of the motor member 410 is transmitted to the input shaft 210, the input shaft 210 can rotate through the operation of the motor member 410, or the input shaft 210 can be prevented from rotating when the motor member 410 stops. Accordingly, the steering wheel cannot rotate and can be fixed.

[0107] The elastic member 430 can be disposed between the nut member 420 and the end portion of the input shaft member 200 (specifically, the input projection portion 220), and is elastically deformed by the movement of the nut member 420. The elastic member 430 can be a helical spring.

[0108] The vehicle steering device according to the present disclosure may further include a sensor member 500. The sensor member 500 can measure the rotation angle of the input shaft member 200. In the present disclosure, the sensor member 500 can be configured as a torque and angle sensor (TAS) or a linear sensor. The structures and operations of the TAS and the linear sensor may depend on those of a general TAS and a general linear sensor.

[0109] The sensor member 500 can be configured as a torque and angle sensor (TAS) for measuring the torque of the input shaft 210 and measuring the rotation angle of the input projection portion 220. The TAS of the sensor member 500 can measure the steering state of the steering wheel by measuring both the torque of the input shaft 210 and the rotation angle of the input projection portion 220.

[0110] The sensor member 500 can be configured as a linear sensor for measuring the position of the input projection portion 220. The movement route P of the input projection portion 220 can be formed obliquely upward, so that the linear sensor of the sensor member 500 can measure the position deformation of the input projection portion 220.

[0111] The amount of compression deformation of the elastic member 430 caused by the nut pressing member 425 can be adjusted according to the operation of the motor member 410 of the reaction force member 400.

[0112] In the steering device for a vehicle according to the present disclosure, even without a speed reducer, a driver can steer the vehicle while fully feeling the steering reaction force generated by the elastic force of the compressed elastic member.

[0113] In addition, according to the present disclosure, by using a small motor and a nut member, the compression length of the elastic member can be adjusted according to the speed of the vehicle to control the reaction force.

[0114] In addition, according to the present disclosure, without using a basic speed reducer and a large motor, the component parts can be simplified by the elastic member and the small motor member, thereby reducing the manufacturing cost and improving the production efficiency.

[0115] Although specific embodiments of the present disclosure have been described above, the true meaning and scope of the present disclosure are not limited to the specific embodiments, and those skilled in the art to which the present disclosure pertains can make various modifications and changes to the present disclosure without departing from the subject matter of the present disclosure disclosed in the claims.

[0116] Although the present disclosure has been described with reference to the embodiments shown in the accompanying drawings, the embodiments of the present disclosure are for illustrative purposes only, and those skilled in the art will understand that various modifications and other equivalent embodiments can be derived from the embodiments.

Claims

1. A steering device for a vehicle, the steering device comprising: A housing; An input shaft member rotatably mounted in the housing; A conversion guide member mounted on the input shaft member and configured to guide the input shaft member to move linearly in the housing; And A reaction force member configured to provide an elastic force to the input shaft member while adjusting the steering reaction force of the input shaft member.

2. The steering device for a vehicle according to claim 1, wherein the reaction force member comprises: A motor including a motor shaft member; A nut member connected to the motor shaft member and configured to move by rotation of the motor shaft member; And An elastic member interposed between the nut member and the input shaft member and configured to elastically deform as the nut member and the input shaft member move.

3. The steering device for a vehicle according to claim 2, wherein the nut member comprises: A nut main body member fixed to the motor shaft member by a screw and configured to move according to rotation of the motor shaft member; A nut pressing member configured to press the elastic member while moving according to movement of the nut main body member; and A nut insertion portion mounted on the motor shaft member and disposed between the nut main body member and the nut pressing member.

4. The steering device for a vehicle according to claim 3, wherein the nut main body member comprises: A nut main body moving portion fixed to the motor shaft member by a screw; And A nut rotation limiting portion protruding outward from the nut main body moving portion and configured to be adjacent to the inner side of the housing to limit rotation of the nut main body moving portion.

5. The steering device for a vehicle according to claim 4, wherein the nut pressing member comprises: A nut pressing moving portion having a central portion into which the motor shaft member is inserted; And A nut pressing rotation limiting portion protruding outward from the nut pressing moving portion and configured to be adjacent to the inner side of the housing to limit rotation of the nut pressing moving portion.

6. The steering device for a vehicle according to claim 5, wherein the nut pressing rotation limiting portion is configured to move toward the elastic member when pressed by the nut rotation limiting portion.

7. The steering device for a vehicle according to claim 5, wherein the nut pressing member further comprises: Nut peak / trough portions formed with peaks and troughs on a surface of the nut pressing moving portion relative to the nut insertion portion.

8. The steering device for a vehicle according to claim 7, wherein the nut insertion portion comprises: A nut insertion main body portion mounted on the motor shaft member and inserted between the nut main body member and the nut pressing member; And A nut insertion protruding portion protruding from the nut insertion main body portion and configured to rotate in a state where the nut insertion protruding portion is adjacent to the nut peak / trough portions.

9. The steering device for a vehicle according to claim 8, wherein the nut insertion portion comprises: A plurality of nut insertion portions protruding from the nut insertion main body portion toward the input shaft member; And A nut insertion fastening portion fixed to the input shaft member.

10. The steering device for a vehicle according to claim 9, wherein the conversion guide member includes: A first conversion guide member adjacent to the elastic member and receiving the elastic force from the elastic member; A second conversion guide member spaced apart from the first conversion guide member and for rotatably mounting the input shaft member on the second conversion guide member; and A conversion rotation limiting member for connecting the first conversion guide member and the second conversion guide member and limiting the rotation angle of the input shaft member.

11. The steering device for a vehicle according to claim 10, wherein the conversion guide member further includes a plurality of conversion protrusion portions respectively protruding from the first conversion guide member and the second conversion guide member and inserted into the inner surface of the housing.

12. The steering device for a vehicle according to claim 10, wherein the input shaft member includes: An input shaft rotatably mounted on the second conversion guide member; And An input protrusion portion protruding from the outer surface of the input shaft and for moving between the first conversion guide member and the second conversion guide member, the input protrusion portion being configured to be caught by the conversion rotation limiting member to limit the movement of the input protrusion portion.

13. The steering device for a vehicle according to claim 12, wherein the input shaft member further includes: An input fastening member mounted at the end of the input shaft and fixed to the nut insertion fastening portion.

14. The steering device for a vehicle according to claim 13, wherein the input fastening member includes: An input fastening base portion spaced apart from the input protrusion portion; A plurality of input fastening coupling portions protruding from one side of the input fastening base portion and fixed to the nut insertion fastening portion; And An input fastening elastic portion inserted between the input fastening base portion and the input protrusion portion and configured to elastically deform.

15. The steering device for a vehicle according to claim 14, wherein the input fastening member further includes: An input fastening fixing portion protruding from the other side of the input fastening base portion and for selectively coupling with the input protrusion portion during movement.

16. The steering device for a vehicle according to claim 12, further comprising: A sensor member for measuring the rotation angle of the input shaft member.

17. The steering device for a vehicle according to claim 16, wherein the sensor assembly includes: A torque and angle sensor TAS for measuring the torque amount of the input shaft and the rotation angle of the input protrusion portion.

18. The steering device for a vehicle according to claim 16, wherein the sensor member includes: A linear sensor for measuring the position of the input protrusion portion.

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