Steering device for vehicle

Abstract

Steering device for a vehicle, with: a case; a rotating shaft rotatably mounted in the housing; a movable element that is arranged between the rotating shaft and the housing and is moved by a rotational movement of the rotating shaft; a first rotational movement limiter, which is provided within the housing and configured to limit the extent of movement of the moving element in a first direction, thereby limiting the extent of rotational movement of the rotating shaft in a first direction; and a second rotation limiter connected to the housing and configured to cover an opening in the housing and to limit the extent of movement of the moving element in a second direction, thereby limiting the extent of rotation of the rotating shaft in a second direction.

Description

Background / Invention area

[0001] Exemplary embodiments of the present invention relate to a steering device for a vehicle and in particular a steering device for a vehicle which is capable of limiting a rotational movement of a rotating shaft. Description of the state of the art

[0002] A steer-by-wire (SBW) system is an intelligent steering system that uses electrical signals to transmit a driver's steering intentions through electrical signals, without a mechanical connection between the driver's steering wheel and the vehicle's wheels for control.

[0003] The SBW system features a steering feedback actuator (SFA), which provides a steering wheel response force to the driver, and a road wheel actuator (RWA), which transmits the driver's steering intention to the vehicle wheels and moves them. The SFA and RWA are connected only by wires without any mechanical linkage. Therefore, the SFA system requires a structure to limit the direction of rotation. In the prior art, the number of revolutions is limited using a leadscrew mechanism.

[0004] The state-of-the-art leadscrew mechanism faces the challenge of managing straightness due to tolerance variations resulting from injection molding processes for plastic bushings. Frictional dispersion due to play between the plastic bushing and nuts increases significantly, and noise is generated when steel nuts are used. The assembly of square-shaped bushings leads to increased housing machining costs and requires additional processes.

[0005] When assessing friction, the plastic can stick at extremely low temperatures due to shrinkage, leading to increased friction.

[0006] Furthermore, the plastic must be designed for high strength to allow for an increased run-off torque during steering. Therefore, there is room for improvement in this area.

[0007] The related prior art of the present invention is disclosed in Korean patent application No. 10-2020-0047871 (published on May 8, 2020, entitled “APPARATUS FOR LIMITED STEERING ANGLE IN STEER-BY-WIRE SYSTEM”). Brief description of the invention

[0008] The present invention was developed in an effort to solve the aforementioned problem, and it is an object of the present invention to provide a steering device for a vehicle which is capable of limiting the rotational movement of a rotating shaft.

[0009] According to the present invention, the steering device for a vehicle comprises: a housing, a rotating shaft rotatably mounted in the housing, a movable element arranged between the rotating shaft and the housing and moved by a rotational movement of the rotating shaft, a first rotational movement limiter provided within the housing and configured to limit the extent of movement of the movable element in a first direction, thereby limiting the extent of rotation of the rotating shaft in a first direction, and a second rotational movement limiter connected to the housing and configured to cover an opening in the housing and to limit the extent of movement of the movable element in a second direction, thereby limiting the extent of rotation of the rotating shaft in a second direction.

[0010] The rotating shaft may have a spiral configured to move the moving element.

[0011] The first rotary motion limiter can have a guide recessed in an inside of the housing, extending along the axial direction of the rotating shaft and configured to guide movement of the moving element, and a blocking projection provided on one side of the guide and configured to limit movement of the moving element.

[0012] The movable element can have a spherical element.

[0013] The ball element can roll between the spiral and the guide.

[0014] The ball element, the spiral, and the guide can all have the same curvature.

[0015] The guide can be in the form of a straight line or a diagonal line.

[0016] A multitude of moving elements can be provided. A multitude of spirals can be provided in the rotating shaft, with each of these spirals configured to move the multitude of moving elements.

[0017] The multitude of moving elements can be arranged at corresponding positions on the multitude of spirals along the axial direction of the rotating shaft.

[0018] The spiral can have a first spiral formed along the axial direction of the rotating shaft and a second spiral formed along the axial direction of the rotating shaft and spaced apart from the first spiral.

[0019] Many of the first rotary motion limiters are spaced apart on the inside of the housing.

[0020] The multitude of moving elements each come into contact with the multitude of first rotational movement limiters simultaneously when they come into contact with the first rotational movement limiters.

[0021] The multitude of moving elements each come into contact with the multitude of second rotary motion limiters simultaneously when they come into contact with the second rotary motion limiter.

[0022] According to the present invention, the pivot shaft connected to the steering wheel rotates when a driver operates the steering wheel. The movement of the movable element, which moves along the axial direction of the pivot shaft, is limited by the first rotation limiter or the second rotation limiter, causing the pivot shaft to rotate within a defined angle.

[0023] Furthermore, the present invention can distribute the load exerted on the first rotary motion limiter and the second rotary motion limiter due to the plurality of movable elements that move along the axial direction of the rotary shaft. Brief description of the drawings Fig. 1 shows a perspective bottom view to illustrate a steering device for a vehicle according to a first embodiment of the present invention; Fig. 2 shows a bottom view to illustrate the steering device for a vehicle according to the first embodiment of the present invention; Fig. 3 shows a sectional view to illustrate the steering device for a vehicle according to the first embodiment of the present invention; Fig. 4 and Fig. Figure 5 shows sectional views to illustrate an operating state of the steering device for a vehicle according to the first embodiment of the present invention; Fig. Figure 6 shows a perspective bottom view to illustrate a steering device for a vehicle according to a second embodiment of the present invention; Fig. 7 shows a bottom view to illustrate the steering device for a vehicle according to the second embodiment of the present invention; Fig. Figure 8 shows a sectional view illustrating the steering device for a vehicle according to the second embodiment of the present invention; and Fig. 9 and Fig. Figure 10 shows sectional views to illustrate an operating state of the steering device for a vehicle according to the second embodiment of the present invention. Detailed description

[0024] The following describes in detail embodiments of a steering device for a vehicle according to the present invention with reference to the accompanying drawings. For the sake of clarity and simplicity, line thicknesses, sizes of individual elements, and the like may be shown in the drawings in an approximate ratio. Furthermore, the terms used below are defined with respect to their functions in the present invention and may vary depending on the intention of a user or operator, or on common practice. Therefore, these terms should be defined in light of the present description.

[0025] Fig. Figure 1 shows a perspective bottom view to illustrate a steering device for a vehicle according to a first embodiment of the present invention. Fig. Figure 2 shows a bottom view illustrating the steering device for a vehicle according to the first embodiment of the present invention. Fig. Figure 3 shows a sectional view illustrating the steering device for a vehicle according to the first embodiment of the present invention.

[0026] According to the Fig. 1 to 5 a steering device 1 for a vehicle according to the first embodiment of the present invention comprises a housing 110, a rotary shaft 120, a movable element 130, a first rotary motion limiter 140 and a second rotary motion limiter 150.

[0027] The housing 110 can be mounted on a vehicle body. The housing 110 can be made of metal or plastic and is permanently installed on the vehicle body, forming a drive seat. An opening 110a can be provided on one side (underside in Fig. 1) of the housing 110.

[0028] The rotary shaft 120 is rotatably mounted in the housing 110. One side (top side in Fig. 3) The rotary shaft 120 can engage with a shaft of a worm gear (not shown) which is mounted in the steering device 1 for a vehicle and can be axially rotated in response to a rotary movement of the shaft of the worm gear.

[0029] The rotary shaft 120 can be axially connected to a bearing 10, which is installed inside the housing 110. The bearing 10 can rotatably support the rotary shaft 120.

[0030] The movable element 130 is arranged between the rotating shaft 120 and the housing 110. The movable element 130 is moved by the rotational movement of the rotating shaft 120. The movable element 130 may include a ball element 131. The ball element 131 may be made of metal or plastic.

[0031] The rotating shaft 120 can have a spiral 121. The spiral 121 can be located on the outer circumferential surface of the opposite side (underside). Fig. 3) the rotating shaft 120. The spiral 121 can be formed along the axial direction of the rotating shaft 120. The spiral 121 can be configured to move the movable element 130. Here, the rotating shaft 120 can be, for example, a screw with a single thread.

[0032] The spherical element 131 can be seated in a screw groove of the spiral 121. In this case, the spherical element 131 can have the same curvature as the screw groove.

[0033] The first rotation limiter 140 can be provided inside the housing 110. The first rotation limiter 140 limits the extent of a movement (a) of the moving element 130 in a first direction, so that the extent of a rotational movement (A) of the rotating shaft 120 in a first direction is limited.

[0034] This means that the first rotation limiter 140 can limit the rotation of the rotary shaft 120 by restricting the movement of the movable element 130 such that the rotary shaft 120 rotates within a defined angle. The first rotation limiter 140 can have a guide 141 and a locking projection 142.

[0035] The guide 141 can be recessed into an inner surface of the housing 110. The guide 141 can be formed along the axial direction of the rotating shaft 120. The guide 141 can guide the movement of the moving element 130.

[0036] The ball element 131 can sit on the guide 141. The ball element 131 can have the same curvature as the guide 141. The ball element 131 can roll between the spiral 121 and the guide 141. Furthermore, the ball element 131 can move back and forth in the axial direction of the rotating shaft 120, depending on the direction of rotation of the rotating shaft 120.

[0037] Grease can be applied to the ball element 131, which rolls between the spiral 121 and the guide 141, to reduce frictional resistance.

[0038] The guide 141 can be in the form of a straight line that is identical to the axial direction of the rotary shaft 120, or in the form of a diagonal line that is inclined at a specified angle.

[0039] The blocking projection 142 can be on one side (top in Fig. 3) the guide 141. The locking projection 142 can protrude from the guide 141 in the direction of the rotating shaft 120. Furthermore, the guide 141 can be stepped relative to the locking projection 142. The locking projection 142 can limit the movement of the movable element 130.

[0040] The second rotary motion limiter 150 is connected to the housing 110. The second rotary motion limiter 150 covers the opening 110a of the housing 110. The second rotary motion limiter 150 limits the extent of a movement (b) of the movable element 130 in a second direction, thus limiting the extent of a rotary movement (B) of the rotating shaft 120 in a second direction.

[0041] This means that the second rotary motion limiter 150 can limit the rotary motion of the rotary shaft 120 by limiting the movement of the movable element 130, so that the rotary shaft 120 rotates within a specified angle.

[0042] The following describes the functioning of the steering device for a vehicle according to the first embodiment of the present invention with the configuration described above.

[0043] Fig. 4 and Fig. Figure 5 shows sectional views to illustrate an operating state of the steering device for a vehicle according to the first embodiment of the present invention.

[0044] According to the Fig. 1 and Fig. 4. The movable element 130 performs the movement (a) in the first direction along the spiral 121 of the rotating shaft 120 when the rotating shaft 120 performs the rotational movement (A) in the first direction. In this case, the movement of the movable element 130 is guided by the guide 141 towards the axial direction of the rotating shaft 120. Here, the rotational movement (A) of the rotating shaft 120 in the first direction can be counterclockwise, and the movement (a) of the movable element 130 in the first direction can be in the opposite direction (top side in Fig. 4) to the position of the opening 110a of the housing 110.

[0045] The movement of the movable element 130, which performs the movement (a) in the first direction through the spiral 121 of the rotating shaft 120 and the guide 141, is limited by the blocking projection 142, thereby limiting the rotational movement (A) of the rotating shaft 120 in the first direction.

[0046] According to the Fig. 1 and Fig. 5. The movable element 130 performs the movement (b) in the second direction along the spiral 121 of the rotating shaft 120 when the rotating shaft 120 performs the rotational movement (B) in the second direction. In this case, the movement of the movable element 130 is guided by the guide 141 towards the axial direction of the rotating shaft 120. Here, the rotational movement (B) of the rotating shaft 120 in the second direction can be clockwise, and the movement (b) of the movable element 130 in the second direction can be in the direction (underside in Fig. 5) take place, in which the opening 110a of the housing 110 is located.

[0047] The movement of the movable element 130, which performs the movement (b) in the second direction through the spiral 121 of the rotating shaft 120 and the guide 141, is limited by the second rotational movement limiter 150, which is connected to the housing 110 and is configured to cover the opening 110a, thereby limiting the rotational movement (B) of the rotating shaft 120 in the second direction.

[0048] Fig. Figure 6 shows a perspective bottom view to illustrate a steering device for a vehicle according to a second embodiment of the present invention. Fig. Figure 7 shows a bottom view illustrating the steering device for a vehicle according to the second embodiment of the present invention. Fig. Figure 8 shows a sectional view illustrating the steering device for a vehicle according to the second embodiment of the present invention.

[0049] According to the Fig. 6 to 10, a steering device 2 for a vehicle according to the second embodiment comprises a housing 210, a rotary shaft 220, a movable element 230, a first rotary motion limiter 240 and a second rotary motion limiter 250, the details of which are shown below.

[0050] The housing 210 can be mounted on a vehicle body. The housing 210 can be made of metal or plastic and can be permanently installed on the vehicle body, forming a drive seat. An opening 210a can be provided on one side (underside in Fig. 6) of the housing 210.

[0051] The rotary shaft 220 is rotatably mounted in the housing 210. One side (top side in Fig. 8) The rotary shaft 220 can engage with a shaft of a worm gear (not shown) which is mounted in the steering device 2 for a vehicle and can be axially rotated in response to a rotary movement of the shaft of the worm gear.

[0052] The rotary shaft 220 can be axially connected to a bearing 20, which is installed inside the housing 210. The bearing 20 can rotatably support the rotary shaft 220.

[0053] The movable element 230 is arranged between the rotating shaft 220 and the housing 210. The movable element 230 is moved by a rotational movement of the rotating shaft 220. The movable element 230 may include a ball element 231. The ball element 231 may be made of metal or plastic.

[0054] A plurality of movable elements 230 can be provided. According to one embodiment, the movable element 230 can comprise a first movable element 231 and a second movable element 232. Furthermore, the first movable element 231 can comprise a first spherical element 231a and the second movable element 232 can comprise a second spherical element 232a.

[0055] The rotating shaft 220 can have a spiral 221. The spiral 221 can be located on the outer circumferential surface of the opposite side (underside in Fig. 8) the rotating shaft 220 may be designed. A plurality of spirals 221 may be provided. In other words, the rotating shaft 220 may have a multi-start screw with a plurality of spirals 221.

[0056] According to one embodiment, the spiral 221 can have a first spiral 221a and a second spiral 221b. The first spiral 221a can be formed along the axial direction of the rotating shaft 220. The first spiral 221a can be configured to move the first movable element 231.

[0057] The second spiral 221b can be formed along the axial direction of the rotating shaft 220. The second spiral 221b can be spaced apart from the first spiral 221a. In the second embodiment, the rotating shaft 220 can, for example, be a screw with a double thread.

[0058] The first spherical element 231a can sit on a screw groove of the first spiral 221a. The first spherical element 231a can have the same curvature as the screw groove of the first spiral 221a.

[0059] The second spherical element 232a can sit on a screw groove of the second spiral 221b. The second spherical element 232a can have the same curvature as the screw groove of the second spiral 221b.

[0060] The first rotation limiter 240 can be provided inside the housing 210. The first rotation limiter 240 limits the extent of a movement (a) of the moving element 230 in a first direction, so that the extent of a rotational movement (A) of the rotating shaft 220 in a first direction is limited.

[0061] This means that the first rotation limiter 240 can limit the rotation of the rotating shaft 220 by restricting the movement of the movable element 230 such that the rotating shaft 220 rotates within a defined angle. A plurality of first rotation limiters 240 can be provided.

[0062] The plurality of first rotary motion limiters 240 can be spaced apart on an inner surface of the housing 210. Additionally, the plurality of first rotary motion limiters 240 can be spaced apart along the circumferential direction of the housing 210. The first rotary motion limiter 240 can have a guide 241 and a locking projection 242.

[0063] The guide 241 can be recessed into an inner surface of the housing 210. The guide 241 can extend along the axial direction of the rotating shaft 220. The guide 241 can guide the movement of the moving element 230. The guide 241 can have a first guide 241a and a second guide 241b.

[0064] The first ball element 231a can sit on the first guide 241a. The first ball element 231a can have the same curvature as the first guide 241a. The first ball element 231a can roll between the first spiral 221a and the guide 241a. Grease can be applied to the first ball element 231a, which rolls between the first spiral 221a and the first guide 241a, to reduce frictional resistance.

[0065] The second ball element 232a can sit on the second guide 241b. The second ball element 232a can have the same curvature as the second guide 241b. The second ball element 232a can roll between the second spiral 221b and the second guide 241b. Grease can be applied to the second ball element 232a, which rolls between the second spiral 221b and the second guide 241b, to reduce frictional resistance.

[0066] Depending on the direction of rotation of the rotating shaft 220, the first spherical element 231a and the second spherical element 232a can move back and forth in the axial direction of the rotating shaft 220.

[0067] The first guide 241a and the second guide 241b can be in the form of a straight line that is identical to the axial direction of the rotating shaft 220, or in the form of a diagonal line that is inclined by a specified angle.

[0068] The blocking projection 242 can be located on one side (top in Fig. 8) the guide 241. The blocking projection 242 can protrude from the guide 241 in the direction of the rotating shaft 220. In addition, the guide 241 can be stepped relative to the blocking projection 242.

[0069] A large number of locking projections 242 can be provided. For example, in the case of a screw with a double thread, two locking projections 242 can be provided, and in the case of a screw with a triple thread, three locking projections 242 can be provided.

[0070] In other words, the number of movable elements 230 can be equal to the number of locking projections 242. If the rotating shaft 220 is a double-threaded worm gear in which two spirals 221 are formed, the movable elements 230 can each be arranged on the threads, and each thread can be provided with the locking projection 242.

[0071] According to the second embodiment, the locking projection 242 can have a first locking projection 242a and a second locking projection 242b. The first locking projection 242a can limit the movement of the first movable element 231, and the second locking projection 242b can limit the movement of the second movable element 232.

[0072] The second rotary motion limiter 250 is connected to the housing 210. The second rotary motion limiter 250 covers an opening 210a of the housing 210. The second rotary motion limiter 250 limits the extent of a movement (b) of the movable element 230 in a second direction, so that the extent of a rotary movement (B) of the rotating shaft 220 in a second direction is limited.

[0073] This means that the second rotary motion limiter 250 can limit the rotary motion of the rotary shaft 220 by limiting the movement of the movable element 230 in such a way that the rotary shaft 220 rotates within a specified angle.

[0074] The following describes the functioning of the steering device for a vehicle according to the second embodiment of the present invention with the configuration described above.

[0075] The Fig. 9 and Fig. Figure 10 shows sectional views to illustrate an operating state of the steering device for a vehicle according to the second embodiment of the present invention.

[0076] According to the Fig. 6 and Fig. 9 the first motion element 231 and the second motion element 232 perform the motion (a) in the first direction along the first spiral 221a and the second spiral 221b of the rotating shaft 220 when the rotating shaft 220 performs the rotational motion (A) in the first direction.

[0077] The movement of the first movable element 231 is guided by the first guide 241a in the axial direction of the rotating shaft 220, and the movement of the second movable element 232 is guided by the second guide 241b in the axial direction of the rotating shaft 220.

[0078] The rotational movement (A) of the rotating shaft 220 in the first direction can be counterclockwise, and the movement (a) of the first movable element 231 and the second movable element 232 in the first direction can be in the opposite direction (top side in Fig. 9) to the position of the opening 210a of the housing 210.

[0079] The movement of the first movable element 231, which performs the movement (a) in the first direction through the first spiral 221a of the rotating shaft 220 and the first guide 241a, and of the second movable element 232, which performs the movement (a) in the first direction through the second spiral 221b and the second guide 241b, are limited by the first locking projection 242a and the second locking projection 242b respectively, thereby limiting the rotational movement (A) of the rotating shaft 220 in the first direction.

[0080] The multitude of movable elements 230 can be arranged at corresponding positions on the multitude of spirals 221 along the axial direction of the rotating shaft 220.

[0081] If the rotating shaft 220 is a double-threaded screw in which two spirals 221 are formed, the first movable element 231 and the second movable element 232 can be positioned at the same position in the axial direction and moved by the same amount. Therefore, the first movable element 231 and the second movable element 232 are each simultaneously blocked by the first locking projection 242a and the second locking projection 242b, respectively.

[0082] The multitude of movable elements 230 can each come into contact with the first rotational movement limiter 240, in particular with the blocking projection 242, thereby simultaneously coming into contact with the multitude of blocking projections 242.

[0083] If the rotating shaft 220 is a screw with a triple thread in which three spirals 221 are formed, three movable elements can be arranged in the same position in the axial direction and moved by the same amount. Therefore, three movable elements 230 are blocked by three locking projections 242.

[0084] According to the Fig. 6 and Fig. 10. The first movable element 231 and the second movable element 232 perform the movement (B) in the second direction along the first spiral 221a and the second spiral 221b of the rotating shaft 220 when the rotating shaft 220 performs the rotational movement (B) in the second direction.

[0085] The movement of the first movable element 231 is guided by the first guide 241a in the axial direction of the rotating shaft 220, and the movement of the second movable element 232 is guided by the second guide 241b in the axial direction of the rotating shaft 220.

[0086] The rotational movement (B) of the rotating shaft 220 in the second direction can be clockwise, and the movement (a) of the first movable element 231 and the second movable element 232 in the first direction can be in the direction (underside in Fig. 10) in which the opening 210a of the housing 210 is located.

[0087] The first movable element 231 performs the movement (b) in the second direction through the first spiral 221a of the rotating shaft 220 and the first guide 241a, and the second movable element 232 performs the movement (b) in the second direction through the second spiral 221b and the second guide 241b. The movement of both movable elements is limited by the second rotation limiter 250, which is connected to the housing 210 and configured to cover the opening 210a, thereby limiting the rotation (B) of the rotating shaft 220 in the second direction.

[0088] The steering device 1 for a vehicle according to the first embodiment of the present invention can be operated as follows: When a driver operates a steering wheel, the pivot shaft 120 connected to the steering wheel rotates. The movement of the movable element 130, which moves along the axial direction of the pivot shaft 120, is limited by the first rotation limiter 140 or the second rotation limiter 150, causing the pivot shaft 120 to rotate within a defined angle.

[0089] The steering device 2 for a vehicle according to the second embodiment of the present invention can distribute the load exerted on the first rotary motion limiter 240 and the second rotary motion limiter 250 due to the plurality of movable elements 230 which move along the axial direction of the rotary shaft 220.

[0090] The present invention has been described with reference to the embodiments illustrated in the drawings. Although exemplary embodiments of the invention have been shown for illustrative purposes, it is apparent to those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true technical scope of the invention is to be defined by the following claims. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] KR 10-2020-0047871

[0007]

Claims

[1] Steering device for a vehicle, comprising: a housing; a rotating shaft rotatably mounted in the housing; a movable member disposed between the rotary shaft and the housing and moved by a rotational movement of the rotary shaft; a first rotation limiter provided within the housing and configured to limit the amount of movement of the movable member in a first direction, thereby limiting the amount of rotation of the rotary shaft in a first direction; and a second rotation limiter connected to the housing and configured to cover an opening of the housing and limit the amount of movement of the movable member in a second direction, thereby limiting the amount of rotation of the rotary shaft in a second direction. [2] A steering device for a vehicle according to claim 1, wherein the rotary shaft has a spiral configured to move the movable member. [3] A steering device for a vehicle according to claim 2, wherein the first rotation limiter comprises: a guide recessed in an inner surface of the housing, formed along the axial direction of the rotary shaft, and configured to guide a movement of the movable member; and a blocking projection provided on one side of the guide and configured to limit the movement of the movable member in the first direction. [4] A steering device for a vehicle according to claim 3, wherein the movable member comprises a ball member. [5] A steering device for a vehicle according to claim 4, wherein the ball member rolls between the spiral and the guide. [6] Steering device for a vehicle according to one of claims 3 to 5, wherein the ball element, the spiral and the guide have the same curvature. [7] A steering device for a vehicle according to any one of claims 3 to 6, wherein the guide is formed in the form of a straight line or in the form of a diagonal line. [8] A steering device for a vehicle according to any one of claims 3 to 7, wherein a plurality of said movable members are provided and a plurality of scrolls are provided in the rotary shaft, the plurality of scrolls being configured to move the plurality of movable members, respectively. [9] A steering device for a vehicle according to claim 8, wherein the plurality of movable members are arranged at corresponding positions on the plurality of spirals along the axial direction of the rotary shaft. [10] A steering device for a vehicle according to claim 8 or 9, wherein the spiral comprises: a first spiral formed along the axial direction of the rotary shaft; and a second spiral formed along the axial direction of the rotary shaft and spaced from the first spiral. [11] A steering device for a vehicle according to any one of claims 8 to 10, wherein a plurality of said first rotation limiters are arranged spaced apart from each other on an inner side of said housing. [12] A steering device for a vehicle according to claim 11, wherein the plurality of movable members each come into contact with the plurality of first rotation limiters at the same time when they come into contact with the first rotation limiters. [13] A steering device for a vehicle according to claim 11 or 12, wherein the plurality of movable members come into contact with the plurality of second rotation limiters simultaneously when they come into contact with the second rotation limiter.

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