STEERING DEVICE

Abstract

Steering device, which includes: an outer tube (100) that is elongated in one direction; a middle tube (200), at least part of which is inserted into the outer tube (100); an inner tube (300) that is partially inserted into the middle tube (200); a steering shaft (400) which is partially inserted into the inner tube (300) and is partially movable along a longitudinal direction of the outer tube (100) together with the inner tube (300); a motor (300) which is configured to supply power such that the middle tube (200) and the inner tube (300) move along the longitudinal direction of the outer tube (100); a first transport guide (600) which is arranged along the longitudinal direction of the outer tube (100) and is supported by the outer tube (100); a second transport guide (700), which is separate from the first transport guide (600) and arranged along the longitudinal direction of the outer tube (100), and guides the transport of the inner tube (300); and a reduction gear (800) which is supported by the first transport guide (600) and the second transport guide (700) and is designed to delay the power supplied by the motor (500) and to transmit the delayed power, the reduction gear (800) includes: a worm (820) which is turned by the motor (500), a first gear (830) which engages with the worm (820) and is supported by the first transport guide (600), and a second gear (840) which engages with the first gear (830) and is supported by the second transport guide (700), wherein the reduction gear (800) further comprises a housing (810) in which the first gear (830) and the second gear (840) are housed, characterized by the fact that the first transport guide (600) carries out the transport of the middle tube (200) and the inner tube (300) as well as the reduction gear (800).

Description

TECHNICAL FIELD

[0001] An embodiment of the present disclosure relates to a steering device according to the preamble of claim 1 and a steering device according to the preamble of claim 9, more particularly to a steering device that assists a steering wheel of a vehicle to effectively adjust a length of the steering wheel in a narrow space. BACKGROUND

[0002] Generally, a steering device is installed in a vehicle and assists the steering wheel to transmit the steering of a wheel according to the rotation of the steering wheel. Specifically, the steering device effectively transmits a steering angle of the steering wheel to the steering of the wheel.

[0003] The steering device can also adjust the distance between a driver and the steering wheel according to the driver's preferred environment.

[0004] In conventional steering devices, the change in stroke according to the length adjustment of the steering wheel is limited by the installation space of the steering device.

[0005] In addition, in the conventional steering device, a screw rod for guiding a pipe movement of the steering device projects backward when a vehicle collision occurs, and thus there is a problem that an injury occurs due to a collision between the screw rod and the driver.

[0006] JP 2018-192929 A describes a vehicle steering device comprising: a first steering shaft, one end portion of which is connected to an output shaft of an electric motor; a nut threaded thereto and secured to a column tube; a second screw shaft arranged parallel to the first screw shaft and one end of which is fixed to a main housing; and a gear element fixed to the first screw shaft and arranged such that an external tooth meshes with the second screw shaft. US 2019 / 0210633 A1 relates to a telescopic steering column. The telescopic steering column comprises a plurality of sleeves that are telescopic relative to one another along a telescopic axis, an electric motor, at least one lead screw, a first and a second set of threads, and a first and a second nut.Publication DE 11 2019 004 741 T5 describes a steering column for a vehicle. The steering column comprises a steering shaft; an inner tube into which the steering shaft is inserted and coupled, and which moves the steering shaft forward or backward as it moves in the longitudinal direction; an outer tube that moves together with the inner tube as it moves in the longitudinal direction and is coupled to the outer side of the inner tube to allow the inner tube to move independently in the longitudinal direction; an outer tube drive for moving the outer tube in the longitudinal direction; and an inner tube drive for moving the inner tube in the longitudinal direction.

[0007] There is therefore a need for a steering device capable of performing a large stroke change in a limited space of the vehicle.

[0008] Furthermore, there is a need for a steering device capable of reducing the injury problem caused by a collision between a driver and the steering device, even if a vehicle accident occurs.

[0009] The object of the invention is achieved by a steering device having the features of claim 1 and with the features of claim 9. SUMMARY

[0010] An embodiment of the present disclosure provides a steering apparatus capable of improving the response of stroke control and greatly adjusting the variability of stroke in a compact installation space.

[0011] According to one aspect of the present disclosure, there is provided a steering device comprising: an outer tube elongated in one direction; a middle tube, at least a portion of which is inserted into the outer tube; an inner tube partially inserted into the middle tube; a steering shaft partially inserted into the inner tube and partially movable together with the inner tube in a longitudinal direction of the outer tube; a motor configured to provide power so that the middle tube and the inner tube move in the longitudinal direction of the outer tube; a first transport guide arranged along the longitudinal direction of the outer tube and supported by the outer tube; a second transport guide separate from the first transport guide and arranged along the longitudinal direction of the outer tube;and a reduction gear supported by the first transport guide and the second transport guide and configured to decelerate the power supplied by the motor and to transmit the decelerated power;

[0012] The reduction gear includes a worm rotated by the motor, a first gear meshed with the worm and supported by the first transport guide, and a second gear meshed with the first gear and supported by the second transport guide.

[0013] The first transport guide and the second transport guide can be formed with windings in different directions.

[0014] The reduction gear may further comprise a deceleration guide arranged between the first transport guide and the first gear and movable along the winding of the first transport guide.

[0015] The reduction gear further comprises a housing in which the first gear and the second gear are housed.

[0016] The steering device may further comprise a first outer guide opening, a portion of which is formed in the outer tube to be open along the longitudinal direction of the outer tube.

[0017] The reduction gear may include a support portion, a portion of which extends through the first outer guide opening and is connected to the central tube.

[0018] The steering device may further comprise a second outer guide opening arranged to be spaced from the first outer guide opening and having a portion formed to be open along the longitudinal direction of the outer tube, and a middle guide opening formed to be open in the middle tube such that the second outer guide opening and at least one portion face each other.

[0019] The steering device may further comprise a guide block part, one side of which moves along the second transport guide and the other side of which is arranged to pass through the second outer guide opening and the middle guide opening and to be supported by the inner tube.

[0020] The guide block part may include a guide block that moves along the second transport guide and a sliding member that supports the inner tube so that the inner tube moves together with the guide block.

[0021] According to another aspect of the present disclosure, a steering device is provided, comprising: an outer tube elongated in one direction; a middle tube, at least a portion of which is inserted into the outer tube; an inner tube partially inserted into the middle tube; a steering shaft partially inserted into the inner tube and partially movable along a longitudinal direction of the outer tube together with the inner tube; a motor configured to supply power so that the middle tube and the inner tube move along the longitudinal direction of the outer tube; a reduction gear configured to decelerate the power supplied by the motor and transmit the decelerated power; a first transport guide arranged to engage with one side of the reduction gear to guide movement of the reduction gear;and a second transport guide arranged to be spaced from the first transport guide to engage with the other side of the reduction gear and to move together when the reduction gear moves to guide movement of the inner tube.;

[0022] The steering device may further include a first outer guide hole, a portion of which is formed in the outer tube to be open along the longitudinal direction of the outer tube, and a support portion, one side of which is connected to the reduction gear and the other side of which passes through the first outer guide hole to be coupled to the middle tube and to move the middle tube together when the reduction gear is used.

[0023] The steering device may further include a second outer guide hole arranged to be spaced apart from the first outer guide hole and having a portion formed to be open along the longitudinal direction of the outer tube, a middle guide hole formed to be open in the middle tube such that the second outer guide hole and at least one portion face each other, an inner guide hole formed to be open in the inner tube such that the middle guide hole and at least one portion face each other, and a guide block part one side of which moves along the second transport guide and the other side of which is coupled to pass through the second outer guide hole, the middle guide hole, and the inner guide hole to move the inner tube.

[0024] The first transport guide and the second transport guide may be arranged to extend in different directions around the reduction gear.

[0025] According to an embodiment of the present disclosure, the steering device can extend the transport path of the inner tube to the same length and also increase its speed, so that it can effectively control the variability of the stroke and has a great influence on the degree of freedom of the installation space. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a perspective view of a steering device according to an embodiment of the present disclosure. Fig. Fig. 2 shows an enlarged view when a housing of the reduction gear section of Fig. 1 protrudes. Fig. Figure 3 shows an enlarged view of the reduction gear section of Fig. 1. Fig. 4 shows a state in which a stroke of the steering device according to an embodiment of the present disclosure is reduced. Fig. 5 is an enlarged view of a guide block part of Fig. 1. Fig. 6 is an enlarged view showing a portion between an inner tube and the reduction gear of Fig. 1 shows. Fig. 7 shows a part of a cross-sectional view along a longitudinal direction of a first transport guide. The Fig. 8 and Fig. 9 illustrate the process of adjusting a stroke of the steering device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the accompanying figures so that a person having ordinary skill in the technical field to which the present disclosure belongs can easily implement it. The present disclosure may be implemented in various forms and is not limited to the embodiments described herein.

[0027] Please note that the drawings are schematic and not to scale. Relative dimensions and proportions of parts in the drawings are exaggerated or reduced in size for clarity, and all dimensions are illustrative and not limiting. Furthermore, the same reference numerals are used to identify similar features of the same structural element or part in two or more drawings.

[0028] In particular, one embodiment of the present disclosure represents an ideal embodiment of the present disclosure. As a result, various changes to the diagram are to be expected. Accordingly, the embodiment is not limited to a specific shape of the depicted area and includes, for example, a shape change due to manufacturing.

[0029] Below, as in the Fig. 1 to 9, an outer tube 100, a middle tube 200, an inner tube 300, a steering shaft 400, a motor 500, a first transport guide 600, a second transport guide 700 and a reduction gear 800 are described.

[0030] The outer tube 100 is elongated in one direction. Furthermore, the outer tube 100 is hollow inside and can form the outer shape of a steering device 101.

[0031] At least a portion of the middle tube 200 can be inserted into the outer tube 100. Specifically, the middle tube 200 can be arranged side by side on the outer tube 100 along a longitudinal direction, and at least a portion of the middle tube 200 can be inserted into the hollow outer tube 100. Furthermore, the middle tube 200 can be retracted and extended along the longitudinal direction of the outer tube 100.

[0032] The middle tube 200 can be slidably carried into the outer tube 100.

[0033] The steering shaft 400 is partially inserted into the inner tube 300, and a portion of the steering shaft 400 can be moved together with the inner tube 300. A portion of the steering shaft 400 is inserted into the inner tube 300 and can be moved along with the movement of the inner tube 300 in the longitudinal direction of the outer tube 100.

[0034] A steering wheel is attached to one end of the steering shaft 400 so that the driver can perform the steering by operating the steering wheel.

[0035] The motor 500 supplies power so that the middle tube 200 and the inner tube 300 move along the longitudinal direction of the outer tube 100. The motor 500 can supply power for movements of the middle tube 200 and the inner tube 300, thereby changing the stroke of the steering device 101.

[0036] The first transport guide 600 is arranged along the longitudinal direction of the outer tube 100 and supported by the outer tube 100. Specifically, the first transport guide 600 may be arranged outside the outer tube 100 in a direction parallel to the longitudinal direction of the outer tube 100. Furthermore, one end of the first transport guide 600 may be supported by the outer tube 100.

[0037] One end of the first transport guide 600 may be supported in the form of a cantilever by an outer support portion that protrudes circumferentially from the outer tube 100.

[0038] The outer support portion of the outer tube 100 may be arranged in a direction opposite to an end portion of the steering shaft 400 in which the steering wheel is installed.

[0039] In addition, the first transport guide 600 guides the transport of the middle pipe 200 and the inner pipe 300.

[0040] The second transport guide 700 is spaced apart from the first transport guide 600 and arranged along the longitudinal direction of the outer tube 100. In particular, the second transport guide 700 can be arranged on the outside of the outer tube 100 and spaced apart from the first transport guide 600.

[0041] In addition, the second transport guide 700 can guide the transport of the inner tube 300.

[0042] For example, a center of the second transport guide 700 and a center of the first transport guide 600 may be arranged parallel to each other.

[0043] The reduction gear 800 is supported by the first transport guide 600 and the second transport guide 700. Furthermore, the reduction gear 800 decelerates and transmits the power supplied by the motor 500. Specifically, the reduction gear 800 can receive power from the motor 500, move along the first transport guide 600, and rotate the second transport guide 700.

[0044] The first transport guide 600 and the second transport guide 700 may be arranged to extend in different directions around the reduction gear 800.

[0045] By such a configuration, in the steering device 101 according to an embodiment of the present disclosure, both the inner tube 300 and the middle tube 200 can move along the longitudinal direction of the outer tube 100, and thus it is possible to effectively adjust the stroke of the steering device 101.

[0046] Specifically, the reduction gear 800 is supported by the first transport guide 600 and the second transport guide 700 and moved along the first transport guide 600 by the power of the motor 500, and the second transport guide 700 can be effectively rotated.

[0047] Furthermore, the reduction gear 800 of the steering device 101 according to an embodiment of the present disclosure includes a worm 820, a first gear 830 and a second gear 840, as shown in Fig. 2 shown.

[0048] The screw 820 can be rotated by the motor 500. Specifically, the screw 820 can be formed on an output shaft of the motor 500 and rotate together according to a rotational force of the motor 500. Furthermore, the output shaft of the motor 500 can be arranged in a direction perpendicular to the first transport guide 600.

[0049] The first gear 830 can be supported by the first transport guide 600. Furthermore, a portion of the outer periphery of the first gear 830 can mesh with the worm 820, so that the first gear rotates according to the rotation of the worm 820. That is, a rotation direction of the first gear 830 can be rotated around a central axis of the first transport guide 600.

[0050] The second gear 840 may be arranged such that an outer periphery meshes with the first gear 830. Furthermore, the second gear 840 may be supported by the second transport guide 700. That is, the second gear 840 may be rotated by the first gear 830.

[0051] When the second gear 840 is rotated by the first gear 830, the second transport guide 700 can also be rotated.

[0052] Therefore, the reduction gear 800 includes the worm 820, the first gear 830, and the second gear 840, so that the power of the motor 500 can be transmitted to the second gear 840 spaced from the first transport guide 600 to rotate the second transport guide 700.

[0053] Furthermore, in the first transport guide 600 and the second transport guide 700 according to an embodiment of the present disclosure, as shown in FIGS. Fig. 1 and Fig. 4, turns are formed in different directions.

[0054] For example, the first transport guide 600 may have a right-handed winding. Furthermore, the second transport guide 700 may have a left-handed winding.

[0055] In particular, one end of the first transport guide 600 may be arranged to be adjacent to one end of the outer tube 100. One end of the second transport guide 700 may support the second gear 840, and the other end of the second transport guide 700 may be arranged adjacent to the other end of the outer tube 100.

[0056] In this case, the other end of the outer tube 100 may be located in a direction relatively close to a position where the steering wheel rests on the steering shaft 400.

[0057] In addition, the length of the first transport guide 600 and the second transport guide 700 may be relatively shorter than the length of the outer tube 100, as shown in Fig. 4 shown.

[0058] In addition, the reduction gear 800 of the steering device 101 according to the invention comprises, as shown in Fig. 7, also a delay guide 860.

[0059] The deceleration guide 860 may be disposed between an outer peripheral surface of the first transport guide 600 and a center of the first gear 830. Furthermore, a groove is formed on an inner peripheral surface of the deceleration guide 860 in a direction in which the deceleration guide 860 engages with the thread formed on the first transport guide 600, so that the deceleration guide 860 can move along the longitudinal direction of the first transport guide 600. The outer periphery of the deceleration guide 860 can engage with the first gear 830 and thus rotate together according to the rotation of the first gear 830.

[0060] That is, according to the rotation of the first gear 830 rotated by the worm 820, the deceleration guide 860 moves the coil of the outer circumference of the first transport guide 600 along the longitudinal direction of the first transport guide 600.

[0061] At this point, as described in the Fig. 2 and Fig. 4, the motor 500 for rotating the worm 820 can also be moved in the longitudinal direction of the first transport guide 600. Furthermore, the second gear 840 is also rotated by the first gear 830, and the second gear 840 and the second transport guide 700 can also be moved along the longitudinal direction of the first transport guide 600.

[0062] Accordingly, the reduction gear 800 can be supplied with rotational power from the motor 500 and can move along the longitudinal direction of the first transport guide 600. When the reduction gear 800 moves along the longitudinal direction of the first transport guide 600, the second transport guide 700 can also move along the longitudinal direction of the first transport guide 600.

[0063] As in Fig. 8, the reduction gear 800 of the steering device 101 according to an embodiment of the present disclosure may further include a rotary guide 870 disposed between the second gear 840 and the second transport guide 700.

[0064] The rotary guide 870 can rotate the second transport guide 700 when the second gear 840 is rotated. Specifically, no winding is formed at one end of the second transport guide 700 connected to the rotary guide 870, so that the rotary guide 870 rotates together with the second gear 840 when the second gear 840 rotates to rotate the second transport guide 700.

[0065] The reduction gear 800 according to an embodiment of the present disclosure also includes a housing 810 as shown in Fig. 3 shown.

[0066] The housing 810 accommodates the first gear 830 and the second gear 840. Furthermore, the housing 810 forms the outer shape of the reduction gear 800 and can secure a space in which the first gear 830 and the second gear 840 mesh and maintain a clearance therebetween. Alternatively, the housing 810 can also accommodate at least a portion of the worm gear 820 formed on the output shaft of the motor 500.

[0067] According to an embodiment of the present disclosure, the steering device 101 may further include a first outer guide opening 110.

[0068] The first outer guide opening 110 may be open in a region of the outer tube 100 along the longitudinal direction of the outer tube 100. In particular, the first outer guide opening 110 may be configured to face the first transport guide 600.

[0069] According to an embodiment of the present disclosure, the reduction gear 800 of the steering device 101 may further include a support portion 850 as shown in Fig. 6 shown.

[0070] A portion of the support portion 850 may be connected to the center tube 200 through the first outer guide opening 110. Specifically, the support portion 850 may connect the housing 810 and the center tube 200.

[0071] The support portion 850 may allow the middle tube 200 and the reduction gear 800 to move together.

[0072] For example, a portion of the housing 810 is configured to extend through the first outer guide opening 110 and connect to the middle tube 200. Alternatively, a separate support portion 850 is connected between the housing 810 and the middle tube 200 so that the middle tube 200 is also moved when the reduction gear 800 is moved along the first transport guide 600.

[0073] Furthermore, the steering device 101 according to an embodiment of the present disclosure may include a second outer guide opening 120 and a middle guide opening 210, as shown in the Fig. 1 to 9 are shown.

[0074] The second outer guide opening 120 may be spaced apart from the first outer guide opening 110. Furthermore, a portion of the outer tube 100 may be configured to be open along the longitudinal direction of the outer tube 100. In particular, the second outer guide opening 120 may be configured to face the second transport guide 700.

[0075] Furthermore, a portion of the second outer guide opening 120 may be arranged relatively close to the other end of the outer tube 100 and a portion of the first outer guide opening 110.

[0076] The central guide opening 210 may be configured to open at the central tube 200. Furthermore, the central guide opening 210 may be configured such that at least a portion thereof faces the second outer guide opening 120.

[0077] Furthermore, the steering device 101 according to an embodiment of the present disclosure may also include a guide block part 900 as shown in the Fig. 5 and 7 to 9.

[0078] The guide block part 900 is arranged such that one side moves along the second transport guide 700, and the other side passes through the second outer guide opening 120 and the middle guide opening 210 to support the inner tube 300. Specifically, one side of the guide block part 900 can move along the winding of the second transport guide 700, and the other side can be supported by the inner tube 300 to move together with the inner tube 300.

[0079] That is, when the guide block part 900 moves along the second transport guide 700, the inner tube 300 can be pushed together.

[0080] Furthermore, the steering device 101 according to an embodiment of the present disclosure may also include an inner guide opening 310.

[0081] The inner guide opening 310 may be configured to be open to the inner tube 300 so that a portion faces the central guide opening 210.

[0082] In addition, the other side of the guide block part 900 can be supported by a portion of the steering shaft 400 through the inner guide opening 310.

[0083] Specifically, the steering shaft 400 includes a first shaft 410, a portion of which is disposed in the outer tube 100, and a second shaft 420, which is inserted into a portion of the first shaft 410 and disposed inside the inner tube 300 and supports the steering wheel.

[0084] The second shaft 420 can be movable along a longitudinal direction of the first shaft 410 and can be rotatably supported in the inner tube 300. When the second shaft 420 rotates, the first shaft 410 can also rotate.

[0085] Furthermore, according to an embodiment of the present disclosure, the guide block part 900 may include a guide block 910 and a sliding member 920, as shown in FIGS. Fig. 8 and Fig. 9 shown.

[0086] The guide block 910 can move along the second transport guide 700. Specifically, a groove is formed on an inner periphery of the guide block 910, which engages with the thread of the second transport guide 700, and when the second transport guide 700 is rotated by the second gear 840, the guide block 910 can move along the second transport guide 700.

[0087] The sliding member 920 supports the movement of the inner tube 300 together with the guide block 910. In particular, the sliding member 920 is supported by the inner tube 300, so that the sliding member 920 moves together with the inner tube 300 when the guide block 910 moves along the second transport guide 700.

[0088] Furthermore, the sliding member 920 is formed with a locking groove 921 to be locked with an end of an inner diameter of the inner guide hole 310, and the portion facing the outer periphery of the second shaft 420 may be formed to contact and support a portion of the second shaft 420.

[0089] Accordingly, the sliding member 920 can support the inner tube 300 and the second shaft 420, so that not only the inner tube 300 but also the second shaft 420 is pulled into and out of the outer tube 100 along the longitudinal direction of the outer tube 100.

[0090] Furthermore, according to an embodiment of the present disclosure, a portion of a side of the inner tube 300 facing the central guide opening 210 may include an inner protrusion 320 projecting toward the central guide opening 210.

[0091] The inner protrusion 320 can prevent the inner peripheral surface of the middle guide hole 210 from colliding with the guide block part 900.

[0092] Furthermore, according to an embodiment of the present disclosure, the guide block part 900 may also include a connecting element 930.

[0093] The connecting member 930 is arranged between the sliding member 920 and the guide block 910 to connect the sliding member 920 and the guide block 910.

[0094] Furthermore, one end of the first transport guide 600 of the steering device 101 according to an embodiment of the present disclosure is cantilevered on the inner tube 300, the other end of the second transport guide 700 is arranged relatively closer to one end of the outer tube 100 than the other end of the inner tube 300, and thereby the driver can be prevented from being injured by the first transport guide 600 and the second transport guide 700 in a vehicle collision.

[0095] By such a configuration, the inner tube 300 and the steering shaft 400 of the steering device 101 according to an embodiment of the present disclosure move when the reduction gear 800 moves along the first conveying guide 600, and also move according to the movement of the guide block part 900 that is moved when the second conveying guide 700 is rotated.

[0096] That is, according to a certain arrangement structure of the reduction gear 800 and the first conveying guide 600 and the second conveying guide 700, the inner tube can have the steering device 101 with a large stroke.

[0097] In other words, the inner tube 300 can be moved along the first transport guide 600 by the power supplied from the motor 500, and also by the guide block part 900 moving along the second transport guide 700 by the rotation of the second transport guide 700.

[0098] In the inner tube 300 of the steering device 101 according to an embodiment of the present disclosure, the movement stroke can be increased, and the speed can also be increased.

[0099] Hereinafter, an operation method of the steering device 101 according to an embodiment of the present disclosure will be described with reference to Fig. 8 to 9 described.

[0100] The driver operates a control knob (not shown) or the like in a direction that shortens the stroke, depending on whether the stroke length of the steering device 101 needs to be adjusted. The motor 500 is operated accordingly.

[0101] The worm gear 820 rotates in one direction with the power supplied by the motor 500. As the worm gear 820 rotates, the first gear 830 meshing with it rotates. At this time, the deceleration guide 860 rotates along the thread of the first conveying guide 600. Accordingly, the reduction gear 800 is moved in a direction where the reduction gear 800 is closer to one end of the outer tube 100 along the longitudinal direction of the first conveying guide 600.

[0102] In addition, the middle tube 200 connected to the support portion 850 of the reduction gear 800 is moved closer to one end of the outer tube 100. At this time, the inner tube 300 connected to the second conveying guide 700 and the guide block part 900 is also moved toward one end of the outer tube 100.

[0103] When the first gear 830 is rotated, the second gear 840 meshing therewith is also rotated, and the second conveying guide 700 is moved along the longitudinal direction of the first conveying guide 600 together with the reduction gear 800 and rotated by the second gear 840.

[0104] The guide block part 910 is transported in a direction adjacent to the reduction gear 800 along the winding of the second transport guide 700 and moves the inner tube 300 closer toward one end of the outer tube 100.

[0105] When the user operates the control knob (not shown) or releases the control knob, the current stroke of the steering device 101 can be maintained.

[0106] Alternatively, if the user operates the control knob (not shown) in a different direction or in a different mode, the steering device 101 can be operated in a direction in which the stroke is extended.

[0107] Accordingly, the inner tube 300, which is arranged together with the second shaft 420 on which the steering wheel is mounted, can be moved not only by the second transport guide 700 moving along the longitudinal direction of the first transport guide 600, but also by the movement of the guide block part 900 in accordance with the rotation of the second transport guide 700.

[0108] Accordingly, the inner tube 300 can be transported over a double distance, so that the inner tube 300 can be moved not only in the longitudinal direction of the first transport guide 600, but also in the longitudinal direction of the second transport guide 700 over the same straight distance.

[0109] The steering device 101 according to an embodiment of the present disclosure can vary the inner tube 300 and the steering shaft 400 can have a large stroke in a narrow space and improve variable speed. Therefore, the driver can be provided with a quick response to the stroke control of the steering device 101, which can reduce steering fatigue.

[0110] Furthermore, the steering device 101 according to an embodiment of the present disclosure can perform an effective stroke change even in a smallest space.

[0111] Although the embodiment of the present disclosure has been described with reference to the accompanying drawings, those skilled in the art to which the present disclosure pertains can understand that the present disclosure may be embodied in other specific forms without changing its technical idea or essential features.

[0112] Therefore, the above-described embodiments are to be considered as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims. [Detailed description of the main elements] 100 outer tube 110 first outer guide opening 200 Middle Pipe 300 inner tube 400 steering shaft 600 first transport guide 800 reduction gears 820 snail 840 second gear 860 Delay control 910 guide block 101 Steering device 120 second outer guide opening 210 Middle guide opening 310 Inner guide opening 500 engine 700 second transport guide 810 case 830 first gear 850 support section 900 guide block part 920 sliding element

Claims

[1] Steering device comprising: an outer tube (100) elongated in one direction; a central tube (200), at least a part of which is inserted into the outer tube (100); an inner tube (300) partially inserted into the middle tube (200); a steering shaft (400) partially inserted into the inner tube (300) and partially movable along a longitudinal direction of the outer tube (100) together with the inner tube (300); a motor (300) configured to supply power so that the middle tube (200) and the inner tube (300) move along the longitudinal direction of the outer tube (100); a first transport guide (600) arranged along the longitudinal direction of the outer tube (100) and supported by the outer tube (100); a second transport guide (700) which is separated from the first transport guide (600) and arranged along the longitudinal direction of the outer tube (100) and guides the transport of the inner tube (300); and a reduction gear (800) carried by the first transport guide (600) and the second transport guide (700) and arranged to decelerate the power supplied by the motor (500) and to transmit the decelerated power, wherein the reduction gear (800) comprises: a screw (820) which is rotated by the motor (500), a first gear (830) meshing with the worm (820) and carried by the first transport guide (600), and a second gear (840) meshing with the first gear (830) and carried by the second transport guide (700), wherein the reduction gear (800) further comprises a housing (810) in which the first gear (830) and the second gear (840) are housed, characterized by , that the first transport guide (600) guides the transport of the middle tube (200) and the inner tube (300) as well as the reduction gear (800). [2] Steering device according to claim 1, wherein the first transport guide (600) and the second transport guide (700) are formed with turns in different directions. [3] The steering device according to claim 1 or 2, wherein the reduction gear (800) further comprises a deceleration guide (860) disposed between the first transport guide (600) and the first gear (830) and movable along the turns of the first transport guide (600). [4] A steering device according to any one of claims 1 to 3, further comprising a first outer guide opening (110), a portion of which is formed in the outer tube to be open in the longitudinal direction of the outer tube (100). [5] The steering device according to claim 4, wherein the reduction gear (800) has a support portion, a portion of which passes through the first outer guide opening (110) and is coupled to the center tube (200). [6] Steering device according to claim 4 or 5 further comprising: a second outer guide opening (120) arranged to be spaced apart from the first outer guide opening (110) and having a portion formed to be open along the longitudinal direction of the outer tube (100); and a central guide opening (210) formed to be open in the central tube (200) such that the second outer guide opening (120) and at least one region face each other. [7] The steering device according to claim 6, further comprising a guide block part (900) of which one side moves along the second transport guide (700) and the other side is arranged to pass through the second outer guide opening (120) and the middle guide opening (210) and is supported by the inner tube (300). [8] Steering device according to claim 7, wherein the guide block part (900) comprises a guide block (910) moving along the second transport guide (700), and a sliding member (920) supporting the inner tube (300) so that the inner tube (300) moves together with the guide block (910). [9] Steering device comprising: an outer tube (100) elongated in one direction; a central tube (200), at least a part of which is inserted into the outer tube (100); an inner tube (300) partially inserted into the middle tube (200); a steering shaft (400) partially inserted into the inner tube (300) and partially movable along a longitudinal direction of the outer tube together with the inner tube (300); a motor (500) configured to supply power so that the middle tube (200) and the inner tube (300) move along the longitudinal direction of the outer tube (100); a reduction gear (800) configured to decelerate the power supplied by the motor (500) and to transmit the decelerated power; a first transport guide (600) configured to guide a movement of the reduction gear (800); and a second transport guide (700) arranged to be spaced apart from the first transport guide (600) to move together when the reduction gear (800) moves to guide movement of the inner tube (300); wherein the reduction gear (800) comprises: a screw (820) which is rotated by the motor (500), a first gear (830) meshing with the worm (820) and carried by the first transport guide (600), and a second gear (840) meshing with the first gear (830) and carried by the second transport guide (700), wherein the reduction gear (800) further comprises a housing (810) in which the first gear (830) and the second gear (840) are housed, characterized by , that the first transport guide (600) guides the transport of the middle tube (200) and the inner tube (300) as well as the reduction gear (800). [10] Steering device according to claim 9, further comprising: a first outer guide opening (110), a portion of which is formed in the outer tube (100) to be open along the longitudinal direction of the outer tube (100); and a support portion (850) having one side connected to the reduction gear (800) and the other side passing through the first outer guide hole (110) to be coupled to the middle tube (200) and moving the middle tube (200) together with the reduction gear (800). [11] Steering device according to claim 10, further comprising: a second outer guide opening (120) arranged to be spaced from the first outer guide opening (110) and having a portion formed to be open along the longitudinal direction of the outer tube (100); a central guide opening (210) formed to be open in the central tube (200) such that the second outer guide opening (120) and at least one region face each other; an inner guide opening (310) formed to be open in the inner tube (300) such that the central guide opening (210) and at least one region face each other; and a guide block part (900) whose one side moves along the second transport guide (700) and whose other side is coupled to pass through the second outer guide opening (120), the middle guide opening (210) and the inner guide opening (310) to move the inner tube (300). [12] Steering device according to one of claims 9 to 11, wherein the first transport guide (600) and the second transport guide (700) are arranged to extend in different directions around the reduction gear (800).

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