Steering apparatus for a vehicle

Abstract

A steering apparatus for a vehicle includes a motor pulley coupled to a rotation shaft of a driving motor, a nut pulley coupled to an outer circumferential surface of a ball nut, a belt connecting the motor pulley and the nut pulley, a first groove provided on an outer circumferential surface of at least one of the motor pulley and the nut pulley, a second groove provided on an inner surface of the belt at a position opposite to the first groove, and an anti-slip member coupled to the first groove.

Description

Technical Field

[0001] This invention relates to a steering device for vehicles. Background Technology

[0002] Typically, steering systems have been developed and applied to vehicles to provide convenience in driving operations by assisting the driver's steering wheel operation force. Power steering systems have been developed and applied to hydraulic types that use hydraulic pressure, electro-hydraulic types that use both hydraulic pressure and electric motor power, and electric types that use only electric motor power.

[0003] In recent years, instead of removing the mechanical connection between the steering wheel and the wheels, such as the steering column, universal joint, or pinion shaft, steer-by-wire devices using electric motors have been developed and applied.

[0004] An electric or steer-by-wire steering system is a drive unit that generates power by an electronic control unit (ECU) that determines the steering wheel's degree of steering via a torque sensor. An electric or steer-by-wire steering system includes a rack that moves a connected tie rod and a driven mechanism that receives the rotational force of the drive unit, converts it into axial movement force on the rack, and transmits it.

[0005] Here, the drive unit includes an electric motor controlled by an electronic control unit (ECU), a motor pulley fixed to the shaft of the electric motor, and a belt wound around the motor pulley. The driven unit includes a ball nut surrounding a rack and pinion and a nut pulley coupled to the outer peripheral surface of the ball nut and wound around the belt.

[0006] Typically, the belt connecting the motor pulley and the nut pulley is engaged via a press fit. Belt slippage occurs between the belt and the motor pulley or between the belt and the nut pulley, thus reducing power transmission efficiency and overall belt power transmission efficiency. This process can generate dust and reduce steering feel. Summary of the Invention

[0007] Technical issues

[0008] This embodiment prevents lateral movement of the belt due to slippage and prevents tooth skipping between the motor pulley or nut pulley and the belt. This embodiment can provide a steering device for a vehicle that increases the driver's steering feel by reducing vibration and clicking noise generated during the operation of the nut pulley.

[0009] Technical solution

[0010] This embodiment provides a steering device for a vehicle, the steering device comprising: a motor pulley connected to the rotating shaft of a drive motor; a nut pulley connected to the outer circumferential surface of a ball nut; a belt connecting the motor pulley and the nut pulley; a first groove disposed on the outer circumferential surface of at least one of the motor pulley and the nut pulley; a second groove disposed on the inner surface of the belt at a position opposite to the first groove; and an anti-slip member connected to the first groove.

[0011] Beneficial effects

[0012] According to this embodiment, a steering device for a vehicle can be provided that prevents lateral movement of the belt due to belt slippage and prevents tooth skipping between the motor pulley or nut pulley and the belt. According to this embodiment, a steering device for a vehicle can be provided that increases the driver's steering feel by reducing vibration and clicking noise generated during the operation of the nut pulley. Attached Figure Description

[0013] Figure 1 and Figure 2 This is a schematic diagram illustrating the steering device for a vehicle in this embodiment.

[0014] Figure 3 This is a perspective view showing a portion of a steering device for a vehicle according to this embodiment.

[0015] Figures 4 to 6 This is an exploded perspective view showing a portion of a steering device for a vehicle according to this embodiment.

[0016] Figure 7 and Figure 8 This is a perspective view showing a portion of a steering device for a vehicle according to this embodiment.

[0017] Figures 9 to 11 This is a side view and a partially enlarged cross-sectional view showing a portion of the steering device for a vehicle according to this embodiment.

[0018] Figure 12 This is a partial cross-sectional view showing a portion of a steering device for a vehicle according to this embodiment. Detailed Implementation

[0019] In the following description of examples or embodiments of this disclosure, reference will be made to the accompanying drawings, in which specific examples or embodiments that may be implemented are illustrated by way of illustration, and the same reference numerals and symbols may be used to denote the same or similar components even when the same or similar components are shown in different drawings. Furthermore, in the following description of examples or embodiments of this disclosure, detailed descriptions of well-known functions and components incorporated herein are omitted when it is determined that the description may make the subject matter of some embodiments of this disclosure considerably unclear. Terms used herein, such as “comprising,” “having,” “including,” “constituting,” “forming,” and “forming,” are generally intended to allow for the addition of additional components, unless the term is used in conjunction with the term “only.” As used herein, singular forms are intended to include plural forms unless the context clearly indicates otherwise.

[0020] Terms such as “first,” “second,” “A,” “B,” “(A),” or “(B)” may be used herein to describe elements of this disclosure. Each of these terms is not used to define the nature, order, sequence, or number of elements, but only to distinguish the corresponding element from other elements.

[0021] When it is mentioned that the first element is "connected or linked to" the second element, or "in contact or overlaps" with the second element, it should be interpreted that not only can the first element be "directly connected or linked to" the second element or "directly in contact or overlap" with the second element, but a third element can also be "inserted" between the first and second elements, or the first and second elements can be "connected or linked," "in contact or overlap" with each other via a fourth element. Here, the second element can be included in at least one of two or more elements that are "connected or linked," "in contact or overlap" with each other.

[0022] When using time-related terms such as “after,” “following,” “next,” “before,” etc., to describe the process or operation of an element or structure, the flow or steps in an operation, process, or manufacturing method, these terms may be used to describe discontinuous or non-sequential processes or operations, unless the terms “direct” or “immediate” are used together.

[0023] Additionally, when referring to any size, relative dimensions, etc., it should be considered that, even without a specific description, the numerical or corresponding information of a component or feature (e.g., level, range, etc.) includes tolerances or error ranges that can be caused by various factors (e.g., process factors, internal or external shocks, noise, etc.). Furthermore, the term "may" fully encompasses all the meanings of the term "able to".

[0024] Figure 1 and Figure 2 This is a schematic diagram illustrating the steering device for a vehicle in this embodiment. Figure 3This is a perspective view showing a portion of a steering device for a vehicle according to this embodiment. Figures 4 to 6 This is an exploded perspective view showing a portion of a steering device for a vehicle according to this embodiment. Figure 7 and Figure 8 This is a perspective view showing a portion of a steering device for a vehicle according to this embodiment. Figures 9 to 11 This is a side view and a partially enlarged cross-sectional view showing a portion of the steering device for a vehicle according to this embodiment. Figure 12 This is a partial cross-sectional view showing a portion of a steering device for a vehicle according to this embodiment.

[0025] like Figures 1 to 12 As shown, the steering device for a vehicle includes: a motor pulley 141 connected to the rotating shaft of a drive motor 121; a nut pulley 145 connected to the outer circumferential surface of a ball nut 147; a belt 143 connecting the motor pulley 141 and the nut pulley 145; first grooves 141a and 145a disposed on the outer circumferential surface of at least one of the motor pulley 141 and the nut pulley 145; a second groove 143a disposed on the inner surface of the belt 143 at a position opposite to the first grooves 141a and 145a; and an anti-slip member 149 connected to the first grooves 141a and 145a.

[0026] Reference Figure 1 The electric vehicle steering device includes a steering system 100 and an auxiliary power mechanism 150 for supplying steering assistance power to the steering system 100.

[0027] The steering system 100 includes a steering shaft 103. The steering shaft 103 has an upper end that is connected to and rotates with the steering wheel 101, and a lower end that is connected to a pinion shaft 119 via a pair of universal joints 115.

[0028] The rack and pinion mechanism unit 110 is formed by meshing a planetary gear 113 formed at the lower end of the pinion shaft 119 and a rack gear 117 formed on an outer peripheral surface of the rack rod 130.

[0029] The auxiliary power mechanism 150 includes a torque sensor 111 that detects the steering torque applied to the steering wheel 101 by the driver and outputs an electrical signal proportional to the sensed steering torque; an electronic control unit (ECU) that generates a control signal based on the electrical signal transmitted from the torque sensor 111; a power motor 121 that generates steering assistance power based on the control signal transmitted from the electronic control unit (ECU); and a belt transmission 140 for transmitting the assistance power generated from the power motor 121 to the rack and pinion 130 via a belt 143.

[0030] Reference Figure 2 In the steering equipment of a vehicle with online steering, an angle sensor 112 and a torque sensor 111 are connected to one side of the steering shaft 103 connected to the steering wheel 101. When the driver turns the steering wheel 101, the angle sensor 112 and the torque sensor 111, which detect the driver's turn, send electrical signals to the electronic control unit (ECU) to operate the steering shaft motor 161 and the pinion shaft motor 121.

[0031] The electronic control unit (ECU) controls the steering shaft motor 161 and the pinion shaft motor 121 based on electrical signals sent from the angle sensor 112 and the torque sensor 111, as well as electrical signals sent from various sensors installed on the vehicle.

[0032] The pinion shaft motor 121 slides the rack rod 130 connected to the belt transmission 140 to steer the wheels 131 on both sides via the tie rod 133 and the nut arm 135. During autonomous driving, when the driver operates the steering wheel 101 or performs steering on the steering shaft 103, the steering shaft motor 161 generates a steering reaction force in the opposite direction.

[0033] However, for the sake of explanation, Figure 2 An angle sensor 112 and a torque sensor 111 are shown mounted on the steering shaft 103, but of course, motor position sensors, various radars, camera image sensors, etc., can be mounted to transmit steering information to the electronic control unit (ECU), and detailed descriptions of them will be omitted below.

[0034] Figure 1 The power motor 121 and Figure 2 The pinion shaft motor 121 can use the same motor. Below, Figure 1 The power motor 121 and Figure 2 The pinion shaft motor 121 is referred to as drive motor 121 in the description of the implementation.

[0035] Reference Figures 1 to 4 The belt-type transmission 140 includes a motor pulley 141 fixed to the shaft of the drive motor 121, a ball nut 147 supporting the rack rod 130, a nut pulley 145 coupled to the outer peripheral surface of the ball nut 147, a belt 143 wound around the motor pulley 141 and the nut pulley 145, and a rack housing 170 in which the motor pulley 141, the nut pulley 145 and the belt 143 are built.

[0036] The ball nut 147 is connected to the rack rod 130 by balls and rotates to allow the rack rod 130 to slide from the inside of the rack housing 170, and the bearing 180 supporting the rotation of the ball nut 147 is mounted on the outer peripheral surface of the ball nut 147.

[0037] The belt 143 connecting the motor pulley 141 and the nut pulley 145 of the belt transmission 140 is connected by a press fit, so that slippage of the belt 143 may occur between the belt 143 and the motor pulley 141 or between the belt 143 and the nut pulley 145.

[0038] Reference Figure 3 and Figure 4 The first groove 145a can be provided on the outer circumferential surface of the nut pulley 145 in the circumferential direction. The first groove 145a can be provided in the center of the body of the nut pulley 145, but is not limited thereto. For example, the first groove 145a can be provided with an offset toward one side or the other side of the nut pulley 145.

[0039] The belt 143 may have a second groove 143a at a position opposite to the first groove 145a of the nut pulley 145. The second groove 143a may be located at the center of the inner surface of the belt 143 in the longitudinal direction, but is not limited thereto. For example, when the second groove 143a is provided with the first groove 145a offset towards either side of the nut pulley 145, the second groove 143a may move towards one side or the other side of the belt 143. This second groove may be provided with an offset.

[0040] The anti-slip member 149a can be connected to the first groove 145A of the nut pulley 145, and the anti-slip member 149a can be configured to protrude more than the body of the nut pulley 145 in the radial direction.

[0041] The anti-slip member 149a is formed in an annular shape and can be fitted into the first groove 145a, or can be integrally fused along the first groove 145a. In this embodiment, as an example, the anti-slip member 149a is shown fitted into the first groove 145a.

[0042] The anti-slip member 149a protrudes radially on the outer circumferential surface of the nut pulley 145, and the radially protruding portion of the anti-slip member 149a can be inserted and rotated along the second groove 143a of the belt 143. Therefore, by providing the anti-slip member 149a between the first groove 145a of the nut pulley 145 and the second groove 143a of the belt 143, slippage between the nut pulley 145 and the belt 143 can be prevented.

[0043] In this case, such as Figure 3 and Figure 4 As shown, the flanges at both ends of the nut pulley 145 can usually be omitted to prevent slippage between the nut pulley 145 and the belt 143.

[0044] Figure 4It is shown that only the nut pulley 145 is provided with a first groove 145a and an anti-slip member 149a connected to the first groove 145a, but as Figure 5 As shown, only the motor pulley 141 may be provided with a first groove 141a and an anti-slip member 149b connected to the first groove 141a.

[0045] Reference Figure 5 The first groove 141a can be disposed on the outer circumferential surface of the motor pulley 141 in the circumferential direction. The first groove 141a can be disposed in the center of the main body of the motor pulley 141, but is not limited thereto. For example, the first groove 141a can be disposed offset toward one side or the other side of the motor pulley 141.

[0046] The second groove 143a may be provided on the inner surface of the belt 143 at a position opposite to the first groove 141a of the motor pulley 141. The second groove 143a may be provided at the center in the longitudinal direction of the belt 143, but is not limited thereto. For example, when the first groove 141a is biased toward one side of the motor pulley 141, the second groove 143a may be biased toward the opposite side of the belt 143.

[0047] The anti-slip member 149b can be connected to the first groove 141a of the motor pulley 141, and the anti-slip member 149b can be configured to protrude further than the outer circumferential surface of the motor pulley 141 in the radial direction. The protruding portion of the anti-slip member 149b can be inserted and rotated along the second groove 143a of the belt 143. Therefore, by providing the anti-slip member 149b between the first groove 141a of the motor pulley 141 and the second groove 143a of the belt 143, slippage between the motor pulley 141 and the belt 143 can be prevented.

[0048] Figure 4 and Figure 5 It is shown that only the nut pulley 145 is provided with a first groove 145a and an anti-slip member 149a connected to the first groove, or only the motor pulley 141 is provided with a first groove 141a and an anti-slip member 149b connected to the first groove, but it is not limited to these.

[0049] Reference Figure 6 First grooves 141a and 145a can be provided in each of the motor pulley 141 and the nut pulley 145. Anti-slip members 149a and 149b can be connected to each of the first groove 141a of the motor pulley 141 and the first groove 145a of the nut pulley 145. Each of the anti-slip members 149a and 149b can be rotated by insertion along a second groove 143a provided in the belt.

[0050] Slippage between the motor pulley 141 and the belt 143 is prevented by an anti-slip member 149b disposed between the first groove 141a of the motor pulley 141 and the second groove 143a of the belt 143. Slippage between the nut pulley 145 and the belt 143 is also prevented by an anti-slip member 149a disposed between the first groove 145a of the nut pulley 145 and the second groove 143a of the belt 143.

[0051] The anti-slip member 149b connected to the first groove 141a of the motor pulley 141 and the anti-slip member 149a connected to the first groove 145a of the nut pulley 145 may have different diameters, but may have the same shape, structure and material.

[0052] Figure 7 and Figure 8 This is an example of the shape of the anti-slip member 149. It can be applied to the anti-slip member 149b connected to the first groove 141a of the motor pulley 141 and the anti-slip member 149a connected to the first groove 145a of the nut pulley 145.

[0053] Reference Figure 7 and Figure 8 The anti-slip member 149 may be provided with a protruding support protrusion 149c. The shape of the protruding support protrusion 149c may be hemispherical as shown in the accompanying drawings, but is not limited thereto. For example, the shape of the support protrusion 149c may be rectangular or rhomboid, conical, or pyramidal, or a combination of two or more shapes selected from the group consisting of hemispherical, rhomboid, conical, and pyramidal shapes. The support protrusion 149c of the anti-slip member 149 can increase the friction of the contact surface.

[0054] At least two or more support protrusions 149c can be provided on the anti-slip member 149. For example, three support protrusions 149c can be provided, and the angle between one of the support protrusions 149c and its adjacent support protrusion 149c can be set to be 120 degrees apart from the center of the anti-slip member 149. In this case, the support protrusions 149c of the anti-slip member can stably support the contact support surface. However, this embodiment is not limited to this, and the angle formed by each of the support protrusions 149c and its adjacent protrusion 149c can be different from each other. As the number of support protrusions 149c of the anti-slip member increases, the friction of the contact surface can be further increased.

[0055] Multiple support protrusions 149c can be spaced apart from each other in the longitudinal direction of the anti-slip member 149. The anti-slip member 149 can be alternately provided with portions without protruding support protrusions 149c and portions with protruding support protrusions 149c. The portions without protruding support protrusions 149c prevent slippage between the nut pulley 145 or motor pulley 141 and the belt 143, and the support protrusions 149c protruding from the anti-slip member 149 can increase the friction of the contact surfaces to prevent tooth skipping between the nut pulley 145 or motor pulley 141 and the belt 143.

[0056] Multiple support protrusions 149c can be arranged by connecting adjacent support protrusions 149c to each other. In this case, the support protrusions 149c can maximize the frictional force of the contact surfaces. The connected support protrusions 149c utilize the maximum frictional force to prevent slippage between the nut pulley 145 or motor pulley 141 and the belt 143, and to prevent tooth skipping between the nut pulley 141 or motor pulley 141 and the belt 143.

[0057] Reference Figure 9 A support protrusion 149c is provided on the outer circumferential surface of the anti-slip member 149b, while the inner circumferential surface of the anti-slip member 149b may not have a support protrusion. The inner circumferential surface of the anti-slip member 149b can be fitted and connected to the first groove 141a of the motor pulley 141. The support protrusion 149c provided on the outer circumferential surface of the anti-slip member 149b can be inserted along the second groove 143b of the belt 143. The support protrusion 149c provided on the outer circumferential surface of the anti-slip member 149b increases the friction with the belt 143, thereby preventing tooth skipping between the motor pulley 141 and the belt 143.

[0058] The first insertion groove 143b into which the support protrusion 149c is inserted can be disposed in the second groove 143a of the band 143. The first insertion groove 143b can be configured to have a shape complementary to the shape of the outer circumferential support protrusion 149c of the anti-slip member 149b. The first insertion groove 143b can be formed by forming the second groove 143a of the band 143 and processing the second groove again to make the first insertion groove 143b disposed in the second groove 143a. However, the invention is not limited thereto, and the second groove 143a and the first insertion groove 143b can be formed simultaneously in the band 143.

[0059] The support protrusion 149c provided on the outer circumferential surface of the anti-slip member 149b has a structure that engages with the first insertion groove 143b provided in the second groove 143a of the band 143, thereby increasing the contact area between the support protrusion 149c and the first insertion groove 143b and further increasing the friction.

[0060] Slippage between the motor pulley 141 and the belt 143 is prevented by an anti-slip member 149b disposed between the first groove 141a of the motor pulley 141 and the second groove 143a of the belt 143. The friction between the support protrusion 149c disposed on the outer circumferential surface of the anti-slip member 149b and the first insertion groove 143b disposed in the second groove 143a of the belt 143 increases, further preventing tooth skipping between the motor pulley 141 and the belt 143.

[0061] Figure 9 The support protrusion 149c is shown disposed on the outer circumferential surface of the anti-slip member 149b, but is not limited thereto.

[0062] Reference Figure 10 A support protrusion 149c is provided on the inner circumferential surface of the anti-slip member 149b, while the outer circumferential surface of the anti-slip member 149b may not have a support protrusion. The support protrusion 149c provided on the inner circumferential surface of the anti-slip member 149b can be inserted into and connected to the first groove 141a. The outer circumferential surface of the anti-slip member 149b can be inserted along the second groove 143a of the belt 143. By providing the support protrusion 149c on the inner circumferential surface of the anti-slip member 149b, the friction with the motor pulley 141 can be increased, thereby increasing the connection force between the anti-slip member 149b and the motor pulley 141.

[0063] The second insertion groove 141b into which the protrusion is inserted can be disposed in the first groove 141a of the motor pulley 141. The second insertion groove 141b can be configured to have a shape complementary to that of the support protrusion 149c disposed on the inner circumferential surface of the anti-slip member 149b. The first groove 141a and the second insertion groove 141b can be formed sequentially or simultaneously.

[0064] The support protrusion 149c provided on the inner circumferential surface of the anti-slip member 149b has a structure that engages in a second insertion groove 141b provided in a first groove 141 of the motor pulley 141. Therefore, the contact area between the support protrusion 149c and the second insertion groove 141b is increased, which allows the connection force between the anti-slip member 149b and the motor pulley 141 to be further increased.

[0065] Slippage between the motor pulley 141 and the belt 143 is prevented by an anti-slip member 149b disposed between the first groove 141a of the motor pulley 141 and the second groove 143b of the belt 143. Due to the increased connecting force between the support protrusion 149c and the second insertion groove 141b of the anti-slip member 149b, and the increased contact friction between the motor pulley 141 and the belt 143, tooth skipping between the motor pulley 141 and the belt 143 can be further prevented.

[0066] Figure 9 and Figure 10 The support protrusion 149c provided on the anti-slip member 149b is shown to be provided on the outer circumferential surface or the inner circumferential surface, but is not limited thereto.

[0067] Reference Figure 11 The support protrusion 149c can be provided on both the outer and inner circumferential surfaces of the anti-slip member 149b. The support protrusion 149c-1 on the outer circumferential surface of the anti-slip member 149b increases the friction with the second groove 143a of the belt 143, and the support protrusion 149c-2 on the inner circumferential surface of the anti-slip member 149b increases the connection force with the first groove 141a of the motor pulley 141.

[0068] The first groove 141a of the motor pulley 141 is provided with a second insertion groove 141b into which a support protrusion 149c-2 on the inner circumferential surface of the anti-slip member 149b is inserted. The second groove 143a of the belt 143 may be provided with a first insertion groove 143b into which a support protrusion 149c-1 on the outer circumferential surface of the anti-slip member 149b is inserted. The support protrusion 149c-1 on the outer circumferential surface of the anti-slip member 149b has a structure that engages with the first insertion groove 143b, and the support protrusion 149c-2 on the inner circumferential surface of the anti-slip member 149b may have a structure that engages with the second insertion groove 141b.

[0069] Slippage between the motor pulley 141 and the belt 143 is prevented by an anti-slip member 149b disposed between the first groove 141a and the second groove 143a. Furthermore, increased friction between the support protrusion 149c-1 on the outer circumferential surface and the first insertion groove 143b, and increased connection force between the support protrusion 149c-2 and the second insertion groove 141b on the inner circumferential surface, further prevents tooth skipping between the motor pulley 141 and the belt 143.

[0070] Reference Figures 9 to 11 The described embodiment is not limited to the case where a first groove 141a is formed in the motor pulley 141 and an anti-slip member 149b is connected to the first groove. For example, the present invention can be applied when only a first groove 145a is formed in the nut pulley 145 and an anti-slip member 149a is connected to the first groove. Alternatively, the above embodiment can be applied even when the anti-slip members 149a and 149b are respectively connected to the first grooves 141a and 145a formed in the motor pulley 141 and the nut pulley 145.

[0071] Anti-slip components 149a and 149b can be made of elastic materials. These elastic materials can be rubber, urethane, Teflon, or silicone. Examples of elastic materials include NR (natural rubber), NBR (nitrile rubber), CR (chloroprene rubber), EPDM (ethylene propylene diene monomer rubber), FPM (fluororubber), SBR (styrene-butadiene rubber), CSM (chlorosulfonated polyethylene), urethane, Teflon, and silicone, etc., to increase the friction between the anti-slip components 149a and 149b and the contact surface, thus absorbing vibrations.

[0072] Reference Figure 12 The belt-driven transmission 140 includes a drive motor 121 controlled by an electronic control unit (ECU), a motor pulley 141 fixed to the shaft of the drive motor 121, a belt 143 wound around the motor pulley 141, a ball nut 147 for supporting the rack rod 130 inside a rack housing 170 surrounding the rack rod 130, and a nut pulley 145 coupled to the outer circumferential surface of the ball nut 147. The ball nut 147 is coupled to the rack rod 130 by balls and rotates to allow the rack rod 130 to slide out of the rack housing 170, and a bearing 180 for supporting the rotation of the ball nut 147 is mounted on the outer circumferential surface of the ball nut 147.

[0073] The anti-slip member 149b connected to the first groove 141a provided in the motor pulley 141 and the anti-slip member 149a connected to the first groove 145a provided in the nut pulley 145 are inserted into the second groove 143a of the belt 143 which is configured to rotate.

[0074] Reference Figure 12 A fixing member 144 for supporting the nut pulley 145 in the axial direction can be connected to at least one end of the ball nut 147 and the other end. The fixing member 144 is disposed in the axial direction of the ball nut 147 and can be connected to a groove formed on the outer circumferential surface. The fixing member 144 restricts the lateral movement of the nut pulley 145, thereby further preventing slippage between the nut pulley 145 and the belt 143.

[0075] The fixing member 144 may be a wave-shaped washer. The wave-shaped washer may include all elastic supports with a wave shape in both directions of the nut pulley 145. The wave-shaped washer can absorb vibrations generated during the rotational operation of the nut pulley 145 and reduce clicking noise.

[0076] According to this embodiment, a steering device for a vehicle can be provided that prevents lateral movement of the belt due to belt slippage and prevents tooth skipping between the motor pulley or nut pulley and the belt. According to this embodiment, a steering device for a vehicle can be provided that increases the driver's steering feel by reducing vibration and clicking noise generated during the operation of the nut pulley.

[0077] The foregoing description has been presented to enable any person skilled in the art to make and use the technical ideas of this disclosure, and has been provided in the context of a particular application and its requirements. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this disclosure. The foregoing description and figures provide examples of the technical ideas of this disclosure for illustrative purposes only. That is, the disclosed embodiments are intended to illustrate the scope of the technical ideas of this disclosure. Therefore, the scope of this disclosure is not limited to the embodiments shown, but should be given the widest scope consistent with the claims. The scope of protection of this disclosure should be interpreted based on the appended claims, and all technical ideas within the scope of their equivalents should be interpreted as being included within the scope of this disclosure.

[0078] Cross-reference to related applications

[0079] This application claims priority to Korean Patent Application No. 10-2021-022076, filed on February 18, 2021, which is incorporated herein by reference for all purposes, as fully set forth herein.

Claims

1. A steering device for a vehicle, the steering device comprising: A motor pulley, which is connected to the rotating shaft of a drive motor; A nut pulley is connected to the outer circumferential surface of a ball nut; A belt connects the motor pulley and the nut pulley; A first groove is disposed on the outer peripheral surface of at least one of the motor pulley and the nut pulley; A second groove is disposed on the inner surface of the strip at a position opposite to the first groove; as well as An anti-slip component, which is connected to the first groove. The anti-slip component is provided with protruding support protrusions. The support protrusion is disposed on the outer peripheral surface of the anti-slip component. The second groove includes a first insertion groove into which the support protrusion is inserted. The anti-slip component is made of an elastic material.

2. The steering device for a vehicle according to claim 1, wherein, A fixing member for supporting the nut pulley in the axial direction is connected to at least one of one end and the other end of the ball nut.

3. The steering device for a vehicle according to claim 2, wherein, The fixing component is a wave washer.

4. The steering device for a vehicle according to claim 1, wherein, The anti-slip component is formed in a ring shape and is fitted into the first groove.

5. The steering device for a vehicle according to claim 1, wherein, The anti-slip component is integrally fused along the first groove.

6. The steering device for a vehicle according to claim 1, wherein, The support protrusion is configured as at least two or more support protrusions.

7. The steering device for a vehicle according to claim 6, wherein, The plurality of support protrusions are arranged to be spaced apart from each other in the longitudinal direction of the anti-slip member.

8. The steering device for a vehicle according to claim 6, wherein, The plurality of support protrusions are arranged to be connected to each other by means of adjacent support protrusions.

9. A steering device for a vehicle, the steering device comprising: A motor pulley, which is connected to the rotating shaft of a drive motor; A nut pulley is connected to the outer circumferential surface of a ball nut; A belt connects the motor pulley and the nut pulley; A first groove is disposed on the outer peripheral surface of at least one of the motor pulley and the nut pulley; A second groove is disposed on the inner surface of the strip at a position opposite to the first groove; as well as An anti-slip component, which is connected to the first groove. The anti-slip component is provided with protruding support protrusions. The support protrusion is disposed on the inner circumferential surface of the anti-slip member, and the anti-slip member is formed of an elastic material.

10. The steering device for a vehicle according to claim 9, wherein, A second insertion groove is provided in the first groove, and the support protrusion is inserted into the second insertion groove.

11. A steering device for a vehicle, the steering device comprising: A motor pulley, which is connected to the rotating shaft of a drive motor; A nut pulley is connected to the outer circumferential surface of a ball nut; A belt connects the motor pulley and the nut pulley; A first groove is disposed on the outer peripheral surface of at least one of the motor pulley and the nut pulley; A second groove is disposed on the inner surface of the strip at a position opposite to the first groove; as well as An anti-slip component, which is connected to the first groove. The anti-slip component is provided with protruding support protrusions. The support protrusion is disposed on both the outer and inner peripheral surfaces of the anti-slip member, and the anti-slip member is formed of an elastic material.

12. The steering device for a vehicle according to claim 11, wherein, The first groove is provided with a second insertion groove, and the support protrusion provided on the inner circumferential surface of the anti-slip member is inserted into the second insertion groove. The second groove is provided with a first insertion groove, and the support protrusion provided on the outer circumferential surface of the anti-slip member is inserted into the first insertion groove.

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