Rack guide device and steering device

Abstract

The rack guide device includes: a housing wall portion having an inner space extending in an orthogonal direction, a first opening that opens toward the rack bar, and a second opening that opens from the inner space in a direction opposite to the rack bar; the adjusting cover is used for closing the second opening; a pressure pad abutting against the rack bar from the first opening; and a coil spring and an O-ring disposed between the adjustment cover and the pressure pad. One of the adjustment cover and the pressure pad has a facing surface facing the other of the adjustment cover and the pressure pad. An annular groove is provided in the facing surface. The inner surface of the annular groove has an inner peripheral surface and an outer peripheral surface facing each other. The annular groove has: a narrow groove in which the groove width between the inner peripheral surface and the outer peripheral surface is smaller than the wire diameter of the O-ring before assembly; and a wide groove, the groove width of which is larger than the wire diameter of the O-ring before assembly.

Description

Technical Field

[0001] The present disclosure relates to a rack guide device and a steering device. Background Art

[0002] As a type of steering device mounted on a vehicle, a rack and pinion type steering device can be cited. In addition, a rack and pinion type steering device includes a rack guide device that presses the rack bar toward the pinion in order to maintain the meshing of the rack bar and the pinion.

[0003] The rack guide device is described in detail. The rack guide device includes a receiving wall, an adjustment cover, a pressure pad, and a coil spring. The receiving wall has an internal space extending in a direction orthogonal to the rack rod, a first opening opening from the internal space toward the rack rod, and a second opening opening in a direction opposite to the rack rod. The adjustment cover closes the second opening to form a bottom wall of the internal space. The pressure pad is arranged in the internal space of the receiving wall and abuts against the rack rod from the first opening. The coil spring is arranged between the pressure pad and the adjustment cover in a contracted state to apply a pressing force to the pressure pad.

[0004] In addition, as shown in the following patent document 1, the adjustment cover has an opposing surface relative to the pressure pad. An annular groove is provided on the opposing surface. And an O-ring is assembled in the annular groove. A part of the O-ring protrudes from the opposing surface and abuts against the pressure pad. Thus, when the pressure pad moves toward the adjustment cover, the O-ring is deformed to reduce the collision load input from the pressure pad to the adjustment cover.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: U.S. Patent Application Publication No. 2021 / 0146989 Summary of the invention

[0008] Problems to be solved by the invention

[0009] However, if there is a gap between the inner surface of the annular groove and the O-ring, the O-ring retreats to the gap due to the pressure from the pressure pad, so the pressure pad easily contacts the adjustment cover. According to such a situation, the O-ring with a crush margin is used to increase the filling rate of the O-ring in the annular groove.

[0010] On the other hand, when an O-ring with a crush margin is pressed into the annular groove, the escape passage of the air in the annular groove is blocked by the O-ring, making it difficult to discharge from the annular groove. In addition, the air in the annular groove is gradually compressed by the O-ring and exerts a large resistance force against the pressing of the O-ring. As a result, the load required for pressing the O-ring is large, making it difficult to assemble the O-ring.

[0011] The present disclosure has been made in view of the above-mentioned problems, and an object of the present disclosure is to provide a rack guide device and a steering device in which an O-ring can be easily assembled into an annular groove.

[0012] Means for solving problems

[0013] In order to achieve the above-mentioned object, a rack guide device of one embodiment of the present disclosure comprises: a receiving wall portion having an internal space extending in a direction orthogonal to a rack bar, a first opening opening from the internal space toward the rack bar, and a second opening opening from the internal space in a direction opposite to the rack bar; an adjustment cover closing the second opening of the receiving wall portion; a pressure pad disposed in the internal space and abutting against the rack bar from the first opening; and a coil spring and an O-ring disposed between the adjustment cover and the pressure pad. One of the adjustment cover and the pressure pad has an opposing surface opposing the other of the adjustment cover and the pressure pad. An annular groove for assembling the O-ring is provided on the opposing surface. The inner surface of the annular groove has an inner circumferential surface and an outer circumferential surface opposing each other. The annular groove has: a narrow groove, the groove width between the inner circumferential surface and the outer circumferential surface of the narrow groove is smaller than the wire diameter of the O-ring before assembly; and a wide groove, the groove width of the wide groove is larger than the wire diameter of the O-ring before assembly.

[0014] The O-ring has a crush margin relative to the narrow groove. Therefore, the filling rate of the O-ring can be increased. In addition, when the O-ring is pressed into the annular groove, a gap extending in the depth direction (hereinafter referred to as the depth direction gap) is generated between the O-ring and the inner peripheral surface or between the O-ring and the outer peripheral surface in the wide groove. Therefore, the air in the annular groove is discharged, and the O-ring can be pressed in with a small force. As a result, it is easy to assemble the O-ring in the annular groove.

[0015] As one embodiment of the rack guide device, the outer peripheral surface has: one or more outer peripheral arc surfaces extending in the circumferential direction with a specified diameter; and one or more outer peripheral bulging surfaces bulging radially outward from the outer peripheral arc surface. The diameter of the inner peripheral surface is constant over the entire circumference. The narrow groove is arranged between the outer peripheral arc surface and the inner peripheral surface. The wide groove is arranged between the outer peripheral bulging surface and the inner peripheral surface.

[0016] As a preferred embodiment of the rack guide device, the opposing surface includes a first annular surface disposed on the inner circumference side of the annular groove, and a second annular surface disposed on the outer circumference side of the annular groove. The first annular surface protrudes toward the other side of the adjustment cover and the pressure pad more than the second annular surface, and serves as a collision surface to which a collision load from the other side of the adjustment cover and the pressure pad is input.

[0017] If a wide groove is provided in the annular groove, the wall portion is reduced and the strength is reduced. In addition, if an outer peripheral bulging surface is provided on the outer peripheral surface side of the annular groove, the strength of the second annular surface is reduced. On the other hand, the strength of the first annular surface as the contact surface is maintained. Therefore, even if the outer peripheral bulging surface is provided, the durability of one of the adjustment cover and the pressure pad will not be damaged.

[0018] As one embodiment of the rack guide device, the inner peripheral surface has: one or more inner peripheral arc surfaces extending in the circumferential direction with a predetermined diameter; and one or more inner peripheral bulging surfaces bulging radially inwardly than the inner peripheral arc surface. The diameter of the outer peripheral surface is constant over the entire circumference. The narrow groove is arranged between the outer peripheral surface and the inner peripheral arc surface. The wide groove is arranged between the outer peripheral surface and the inner peripheral bulging surface.

[0019] As one embodiment of the rack guide device, the outer peripheral surface has: one or more outer peripheral arc surfaces extending in the circumferential direction with a specified diameter; and one or more outer peripheral bulging surfaces bulging radially outward from the outer peripheral arc surface. The inner peripheral surface has: one or more inner peripheral arc surfaces extending in the circumferential direction with a specified diameter; and one or more inner peripheral bulging surfaces bulging radially inward from the inner peripheral arc surface. The narrow groove is arranged between the outer peripheral arc surface and the inner peripheral arc surface. The wide groove is arranged between the outer peripheral bulging surface and the inner peripheral arc surface, between the outer peripheral arc surface and the inner peripheral bulging surface, or between the outer peripheral bulging surface and the inner peripheral bulging surface.

[0020] As one embodiment of the rack guide device, a cross-sectional shape of the O-ring before assembly is a circular shape.

[0021] As one embodiment of the rack guide device, a cross-sectional shape of the O-ring before assembly is a rectangular shape.

[0022] As a preferred embodiment of the rack guide device, the inner surface of the annular groove has a bottom surface. The bottom surface has a first bottom surface and a second bottom surface that is farther from the opposing surface than the first bottom surface. The bottom surface of the narrow groove is the first bottom surface. The bottom surface of the wide groove is the second bottom surface.

[0023] In the process of assembling the O-ring in the annular groove, after the O-ring abuts against the first bottom surface, it is necessary to further press the O-ring. As a result, the gap at the inner corner between the inner circumferential surface and the bottom surface and the gap at the outer corner between the outer circumferential surface and the bottom surface become smaller, and the filling rate is improved. According to the structure, at the moment when the O-ring abuts against the first bottom surface, a radial gap extending radially is generated between the O-ring and the second bottom surface. The radial gap is continuous with the gap in the depth direction. Therefore, the air in the gaps at the outer corner and the inner corner moves to the outer side or the inner side via the radial gap, and then is discharged to the outside via the gap in the depth direction. Therefore, the operation of further pressing the O-ring after the O-ring abuts against the first bottom surface becomes easy.

[0024] In order to achieve the above-mentioned object, a steering device according to one aspect of the present disclosure includes the rack bar extending in the left-right direction of a vehicle, a pinion gear meshing with the rack bar, and the rack guide device.

[0025] According to the steering device, the air in the annular groove is exhausted, and the O-ring can be pressed in with a small force. Therefore, it is easy to assemble the O-ring into the annular groove.

[0026] Effects of the Invention

[0027] According to the guide device and the steering device of the present disclosure, the O-ring can be easily assembled to the annular groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the electric power steering device according to the first embodiment.

[0029] Figure 2 This is a cross-sectional view of the housing according to the first embodiment cut along a direction parallel to the rack bar.

[0030] Figure 3 yes Figure 2 An enlarged view of the rack guide.

[0031] Figure 4 This is a diagram of the adjustment cover according to Embodiment 1 as viewed from a first direction.

[0032] Figure 5 Yes Figure 3 A magnified image of a portion of the image.

[0033] Figure 6 yes Figure 4 Sectional view taken along line VI-VI.

[0034] Figure 7 yes Figure 4 Cross-sectional view taken along line VII-VII.

[0035] Figure 8It is a cross-sectional view showing the time when the second O-ring comes into contact with the pressure pad during the step of mounting the adjustment cover.

[0036] Fig. 9 This is a cross-sectional view showing the moment when the second O-ring is pressed by the pressure pad in the step of mounting the adjustment cover.

[0037] Fig.10 It is a cross-sectional view showing a state where the adjustment cover is completely installed in the installation process of the adjustment cover.

[0038] Fig.11 It is a cross-sectional view of the wide groove in a state where the second O-ring is pressed by the pressure pad.

[0039] Fig.12 This is a diagram of the adjustment cover according to the second embodiment as viewed from the first direction.

[0040] Fig.13 This is a diagram of the adjustment cover according to the third embodiment as viewed from the first direction.

[0041] Fig.14 This is a diagram of the adjustment cover according to the fourth embodiment as viewed from the first direction.

[0042] Fig.15 is a cross-sectional view of the moment when the second O-ring abuts against the first bottom surface in Embodiment 4, and more specifically, Fig.14 Sectional view taken along line XV-XV. DETAILED DESCRIPTION

[0043] Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings. In addition, the present disclosure is not limited to the mode for implementing the following invention (hereinafter referred to as the embodiment). In addition, the constituent elements in the following embodiments include elements that can be easily thought of by those skilled in the art, substantially the same elements, and elements of the so-called equal scope. Furthermore, the constituent elements disclosed in the following embodiments can be appropriately combined.

[0044] (Implementation Method 1)

[0045] Figure 1 It is a schematic diagram of the electric power steering device according to the first embodiment. Figure 2 2 is a cross-sectional view of the housing of Embodiment 1 cut along a direction parallel to the rack bar. The electric power steering device 80 is a device mounted on the front part of the vehicle body and used to steer the wheels. Figure 1 As shown, the electric power steering device 80 includes a steering wheel 81 , a steering column shaft 82 , a universal joint 83 , an intermediate shaft 84 , a universal joint 85 , a steering pinion 86 , a rack bar 87 , an assist device 90 , a housing 91 , and the rack guide device 1 .

[0046] The steering wheel 81 is connected to the steering column shaft 82. The steering column shaft 82, the intermediate shaft 84 and the steering pinion 86 are connected via universal joints 83 and 85. Figure 2 As shown, the steering pinion 86 meshes with the first rack 88 of the rack bar 87. The rack bar 87 has a pressed surface 89 on the back side of the first rack 88. The pressed surface 89 is pressed by the pressure pad 30 of the rack guide device 1 (see Figure 2 As a result, the rack bar 87 is pressed toward the steering pinion 86, and the steering pinion 86 and the first rack 88 are kept in meshing relationship.

[0047] like Figure 1 As shown, the rack bar 87 is arranged in a vehicle width direction ( Figure 1 , Figure 2 The rack bar 87 is supported by the housing 91 so as to be movable in the directions indicated by the arrows X1 and X2. The two ends 87a and 87b of the rack bar 87 are connected to wheels (not shown) via tie rods 92. When the driver operates the steering wheel 81, the operating torque is transmitted to the steering pinion 86, and the steering pinion 86 rotates about the axis O1 (refer to FIG. Figure 2 ) is rotated as the center. As a result, the rack bar 87 moves in the left and right directions of the vehicle (refer to Figure 1 , Figure 2 The wheels are turned as shown by arrows X1, X2.

[0048] The auxiliary device 90 is a part that generates power (auxiliary force) for moving the rack rod 87. Although not specifically shown in the figure, the auxiliary device 90 includes a control device, a motor, and a power transmission device. The control device receives a detection signal from a torque sensor that detects the input torque to the steering pinion 86. In addition, the control device controls the motor so that it drives and outputs the desired auxiliary torque. The power transmission device transmits the rotational motion of the motor to the rack rod. The power transmission device includes a worm gear integrated with the output shaft of the motor, a worm wheel meshing with the worm gear, and an auxiliary pinion gear that rotates integrally with the worm wheel. The auxiliary pinion gear meshes with a second rack (not shown) provided on the rack rod 87. Therefore, an auxiliary force is applied to the rack rod 87 by the drive of the motor.

[0049] Next, the rack guide device 1 will be described in detail. Figure 3 yes Figure 2 An enlarged view of the rack guide. Figure 4 This is a diagram of the adjustment cover according to Embodiment 1 as viewed from a first direction. Figure 5 Yes Figure 3 A magnified image of a portion of the Figure 3 As shown, the rack guide device 1 includes a housing wall portion 2, an adjustment cover 10, a pressure pad 30, a coil spring 40, and O-rings (a first O-ring 51, a second O-ring 52, and a third O-ring 53).

[0050] The receiving wall portion 2 is a cylindrical wall portion (thick portion) integrally provided on the housing 91. The receiving wall portion 2 has an internal space S and two openings (a first opening S1 and a second opening S2). The internal space S extends along the center line O3. The center line O3 is orthogonal to the center line O2 of the rack bar 87. That is, the internal space S extends in a direction orthogonal to the rack bar 87. And, one of the two openings (the first opening S1) opens toward the pressed surface 89 of the rack bar 87. The other of the two openings (the second opening S2) opens in a direction opposite to the rack bar 87.

[0051] Hereinafter, the direction parallel to the center line O3 is referred to as the orthogonal direction. Also, the orthogonal direction in which the first opening S1 exists when viewed from the internal space S is referred to as the first direction Y1. The orthogonal direction in which the second opening S2 exists when viewed from the internal space S is referred to as the second direction Y2.

[0052] An internal thread portion 4 and a sliding surface 5 are provided on the inner circumferential surface 3 of the receiving wall portion 2. The internal thread portion 4 is provided close to the second opening S2. The sliding surface 5 is a cylindrical surface centered on the center line O3, and is provided from the center portion in the orthogonal direction of the internal circumferential surface 3 to the end portion in the first direction Y1. In addition, an inner circumferential step surface 6 is provided between the internal thread portion 4 and the sliding surface 5.

[0053] The adjustment cover 10 is a disc-shaped component that closes the second opening S2 of the receiving wall 2. An external thread 12 is provided on the outer peripheral surface 11 of the adjustment cover 10. The external thread 12 is screwed with the internal thread 4 of the receiving wall 2. Thus, the adjustment cover 10 is fixed to the receiving wall 2.

[0054] An outer peripheral step surface 13 is provided at the end of the outer peripheral surface 11 of the adjustment cover 10 in the first direction Y1. The outer peripheral step surface 13 is opposite to the inner peripheral step surface 6. Moreover, a first O-ring 51 is arranged between the inner peripheral step surface 6 and the outer peripheral step surface 13. Thus, the space between the receiving wall portion 2 and the adjustment cover 10 is sealed. Therefore, the grease in the housing 91 is difficult to flow out to the outside of the receiving wall portion 2.

[0055] A through hole 14 is provided in the center of the adjustment cover 10, which penetrates in the orthogonal direction. The through hole 14 is a hole for inserting a dial gauge when measuring the position of the pressure pad 30 in the orthogonal direction. In addition, a cover 41 is inserted into the through hole 14 from the second direction Y2 to seal the through hole 14. The adjustment cover 10 has an opposing surface 20 facing the first direction Y1. The opposing surface 20 constitutes the bottom surface of the internal space S.

[0056] like Figure 4As shown, on the facing surface 20, a first receiving hole 21, a first annular surface 22, an annular groove 23 and a second annular surface 24 are sequentially provided from the center line O3 toward the radial outer side. Figure 4 In the figure, in order to make the annular groove 23 easier to see, dots are marked in the range of the annular groove 23.

[0057] The first receiving hole 21 is a recess provided on the opposing surface 20. The first receiving hole 21 is cylindrical with the center line O3 as the center. Figure 5 As shown, a portion of the coil spring 40 (the portion close to the second direction Y2) is accommodated in the first receiving hole 21. The central portion of the bottom surface 21a of the first receiving hole 21 is hollowed out by the through hole 14. Therefore, the bottom surface 21a of the first receiving hole 21 is annular (refer to Figure 4 ) Furthermore, the end portion of the coil spring 40 in the second direction Y2 abuts against the bottom surface 21a.

[0058] like Figure 4 As shown, the first annular surface 22 is an annular (circular) surface disposed between the first receiving hole 21 and the annular groove 23. The second annular surface 24 is an annular (circular) surface disposed on the outer circumference of the annular groove 23. Figure 5 As shown, the first annular surface 22 forms a plane with the center line O3 as a perpendicular line. The second annular surface 24 is inclined in a manner located in the second direction Y2 as it moves toward the radially outer side. That is, the second annular surface 24 becomes a conical surface. Therefore, the first annular surface 22 is arranged closer to the first direction Y1 than the second annular surface 24 (refer to the auxiliary line H).

[0059] The annular groove 23 is a depression provided in the opposing surface 20. The annular groove 23 is annular (circular) centered at the center line O3. The second O-ring 52 is pressed into the annular groove 23 from the first direction Y1 and fits into the annular groove 23. In addition, the second O-ring 52 uses an O-ring having a crush margin relative to the annular groove 23. Therefore, the filling rate of the second O-ring 52 in the annular groove 23 is high. In addition, a portion of the second O-ring 52 protrudes in the first direction Y1 from the opposing surface 20 (the first annular surface 22). In addition, the details of the annular groove will be described later.

[0060] like Figure 3 As shown in FIG. 1 , the pressure pad 30 is a cylindrical member centered on the center line O3. The end of the pressure pad 30 in the first direction Y1 protrudes from the first opening S1 into the housing 91. A guide portion 39 made of resin is provided on the end surface 31 in the first direction Y1 of the pressure pad 30. The guide portion 39 abuts against the pressed surface 89 of the rack bar 87.

[0061] The outer peripheral surface 32 of the pressure pad 30 faces the sliding surface 5 of the receiving wall portion 2. Figure 5As shown, a small gap is provided between the outer peripheral surface 32 of the pressure pad 30 and the sliding surface 5 of the housing wall portion 2. Thus, the pressure pad 30 is supported by the housing wall portion 2 so as to be slidable in the orthogonal direction.

[0062] like Figure 3 As shown, two receiving grooves 34 are provided on the outer peripheral surface 32 of the pressure pad 30. The receiving groove 34 is annular with the center line O3 as the center. A third O-ring 53 is fitted in the receiving groove 34. As a result, it is difficult for the grease in the housing 91 to flow out in the second direction Y2 (outside the receiving wall portion 2) through the sliding surface 5 and the pressure pad 30.

[0063] like Figure 5 As shown, the pressure pad 30 has a back surface 35 facing the second direction Y2. The back surface 35 is opposite to the opposing surface 20. The back surface 35 is a plane with the center line O3 as a perpendicular line. In addition, a gap is provided between the opposing surface 20 and the back surface 35 to allow the pressure pad 30 to move in the second direction Y2. The second O-ring 52 abuts against the back surface 35.

[0064] like Figure 3 As shown, a circular second receiving hole 36 recessed in the first direction Y1 is provided in the central portion of the back surface 35. A portion of the coil spring 40 (the portion close to the first direction Y1) is received in the second receiving hole 36. Moreover, the end of the coil spring 40 in the first direction Y1 abuts against the bottom surface of the second receiving hole 36. In addition, the coil spring 40 is assembled between the adjustment cover 10 and the pressure pad 30 in a state of being contracted in the orthogonal direction. As a result, the pressure pad 30 is pressed in the first direction Y1 by the restoring force of the coil spring 40.

[0065] According to the rack guide device 1 of the first embodiment described above, when vibration from the road surface is input to the rack bar 87 and the rack bar 87 and the pressure pad 30 move in the second direction Y2, the back surface 35 of the pressure pad 30 contacts the opposing surface 20 (first annular surface 22) of the adjustment cover 10. As a result, the collision load is input to the portion of the adjustment cover 10 where the first annular surface 22 is provided.

[0066] In addition, the second O-ring 52 is flattened (deformed) by the movement of the pressure pad 30 in the second direction Y2. Therefore, the collision load input to the first annular surface 22 is reduced. And after the back surface 35 contacts the facing surface 20 (first annular surface 22), the pressure pad 30 and the rack bar 87 are pressed in the first direction Y1 by the restoring force of the coil spring 40. As a result, the first rack 88 of the rack bar 87 meshes with the steering pinion 86.

[0067] In addition, the pressure pad 30 may be inclined in the internal space S. That is, a portion of the outer peripheral side of the back surface 35 of the pressure pad 30 may be close to the second annular surface 24. However, the second annular surface 24 is a tapered surface. Therefore, the back surface 35 does not contact the second annular surface 24.

[0068] Next, the annular groove 23 and the second O-ring 52 will be described in detail. Figure 6 yes Figure 4 Sectional view taken along line VI-VI. Figure 7 yes Figure 4 The VII-VII line cross-sectional view. Figure 6 As shown, the inner surface of the annular groove 23 includes an inner peripheral surface 25 and an outer peripheral surface 26 facing each other, and a bottom surface 27 facing the first direction Y1.

[0069] The inner peripheral surface 25 is the side facing radially outward. The outer peripheral surface 26 is the side facing radially inward. Figure 4 As shown in the figure, when viewed from the first direction Y1, the inner circumferential surface 25 is in a circular shape with the center line O3 as the center. That is, the diameter of the inner circumferential surface 25 is constant over the entire circumference. On the other hand, when viewed from the first direction Y1, the outer circumferential surface 26 is in a circular shape with the center line O3 as the center as a whole, and partially bulges outward in the radial direction. That is, the outer circumferential surface 26 has a plurality of outer circumferential arc surfaces 26a extending in the circumferential direction with a predetermined diameter and a plurality of outer circumferential bulging surfaces 26b bulging outward in the radial direction than the outer circumferential arc surfaces 26a.

[0070] The portion disposed between the outer arc surface 26a and the inner surface 25 forms a narrow groove 28. On the other hand, the portion disposed between the outer arc surface 26a and the inner surface 25 forms a wide groove 29. That is, the annular groove 23 includes the narrow groove 28 and the wide groove 29 having different groove widths.

[0071] In addition, in the present embodiment, the outer peripheral bulging surface 26b is arranged at 90° intervals, and a total of four are provided. The outer peripheral arc surface 26a is arranged between the two outer peripheral bulging surfaces 26b, and a total of four are provided. Therefore, the narrow groove 28 and the wide groove 29 are respectively provided with four. In addition, the distance between the bottom surface 27 and the opposing surface 20 of the present embodiment is constant over the entire circumference.

[0072] like Figure 6 As shown, the cross-sectional shape of the second O-ring 52 before being assembled in the annular groove 23 is circular. In addition, the wire diameter of the second O-ring 52 before being assembled in the annular groove 23 is W1. The groove width of the narrow groove 28 is W2. The groove width W2 is smaller than the wire diameter W1. Therefore, the second O-ring 52 has a crush margin relative to the narrow groove 28. Figure 7 As shown, the groove width of the wide groove 29 is W3. The groove width W3 is larger than the wire diameter W1. Therefore, the second O-ring 52 has no crush margin relative to the wide groove 29.

[0073] Next, a process of assembling the second O-ring 52 into the annular groove 23 will be described. Figure 8 It is a cross-sectional view showing the time when the second O-ring comes into contact with the pressure pad during the step of mounting the adjustment cover. Fig. 9 This is a cross-sectional view showing the moment when the second O-ring is pressed by the pressure pad in the step of mounting the adjustment cover. Fig.10 It is a cross-sectional view showing a state where the adjustment cover is completely installed in the installation process of the adjustment cover. Fig.11 It is a cross-sectional view of the wide groove in a state where the second O-ring is pressed by the pressure pad.

[0074] The second O-ring 52 is assembled and installed simultaneously with the adjustment cover 10 to the receiving wall 2. Specifically, a portion of the second O-ring 52 is pressed into the annular groove 23, so that the second O-ring 52 is temporarily fixed to the adjustment cover 10. Next, the adjustment cover 10 is inserted into the second opening S2 of the receiving wall 2 while rotating around the center line O3. As a result, the second O-ring 52 moves in the internal space S of the receiving wall 2 in the first direction Y1. Then, as shown in FIG. Figure 8 As shown, the second O-ring 52 abuts against the back surface 35 of the pressure pad 30 .

[0075] Next, when the adjustment cover 10 is rotated, the adjustment cover 10 moves in the first direction Y1. The second O-ring 52 is pushed in the second direction Y2 by the back surface 35 and is pushed into the annular groove 23. Fig. 9 As shown in FIG. 1 , the second O-ring 52 is sandwiched by the inner circumferential surface 25 and the outer circumferential arc surface 26a in the narrow groove 28. That is, the second O-ring 52 is compressed by the radial compressive load from the inner circumferential surface 25 and the outer circumferential arc surface 26a. Therefore, the cross-sectional shape of the second O-ring 52 is not a circular shape but a shape gradually approximating the shape of the narrow groove 28.

[0076] Next, when the adjustment cover 10 is rotated, the second O-ring 52 is pressed by the back surface 35 and abuts against the bottom surface 27. Moreover, after abutting against the bottom surface 27, the second O-ring 52 is further pressed by the back surface 35, and receives a compressive load in a direction orthogonal to the bottom surface 27 and the back surface 35. As a result, the second O-ring 52 is filled to the vicinity of the inner peripheral corner 15 between the bottom surface 27 and the inner peripheral surface 25 and the outer peripheral corner 16 between the bottom surface 27 and the outer peripheral surface 26. Therefore, the second O-ring 52 has a cross-sectional shape that is similar to the inner surface of the narrow groove 28. That is, the filling rate of the second O-ring 52 in the narrow groove 28 is high.

[0077] Here, if Fig. 9As shown in FIG. 1 , when the second O-ring 52 is sandwiched between the inner circumferential surface 25 and the outer circumferential arc surface 26a, a closed space Q1 surrounded by the second O-ring 52, the inner circumferential surface 25, the outer circumferential arc surface 26a and the bottom surface 27 is generated in the narrow groove 28. If there is no escape hole for discharging air from the closed space Q1, Fig. 9 In the state shown, if the second O-ring 52 is further moved in the second direction Y2, the air in the closed space Q1 is compressed. The compressed air acts as a resistance to the movement of the second O-ring 52 in the first direction Y1.

[0078] On the other hand, Fig.11 As shown in FIG. 2 , the second O-ring 52 does not have an interference with the wide groove 29. That is, in the wide groove 29, the second O-ring 52 is not clamped by the inner peripheral surface 25 and the outer peripheral bulging surface 26b. Therefore, a gap is generated between the second O-ring 52 and the outer peripheral bulging surface 26b. This gap extends in the depth direction of the annular groove 23, and is hereinafter referred to as the depth direction gap Q2.

[0079] In addition, the depth-direction gap Q2 extends toward the bottom surface 27 and is continuous with the closed space Q1. Fig. 9 When the second O-ring 52 is pressed in the second direction Y2 in the state where the second O-ring 52 is sandwiched by the inner circumferential surface 25 and the outer circumferential arc surface 26a, the air in the closed space Q1 is pushed out to the depth direction gap Q2 side and discharged to the outside of the annular groove 23. Since the air in the closed space Q1 does not act as resistance, the second O-ring 52 can be pressed into the annular groove 23 with a small force.

[0080] In addition, Fig.11 , a situation in which a depth direction gap Q2 is generated between the second O-ring 52 and the outer peripheral bulge surface 26b is illustrated, but the depth direction gap Q2 of this embodiment is sometimes also generated between the second O-ring 52 and the inner peripheral surface 25, or between the second O-ring 52 and the outer peripheral bulge surface 26b and between the second O-ring 52 and the inner peripheral surface 25.

[0081] The above is a description of the process of assembling the second O-ring 52 to the annular groove 23. In addition, according to the present embodiment, since the outer peripheral bulging surface 26b is provided on the opposing surface 20, a part of the wall portion is cut away, and the strength of the adjustment cover 10 is reduced. However, the surface cut away due to the outer peripheral bulging surface 26b is not the first annular surface 22 but the second annular surface 24. Therefore, the strength of the first annular surface 22 with which the pressure pad 30 contacts is maintained.

[0082] As described above, the electric power steering device (steering device) 80 of the first embodiment includes a rack bar 87 extending in the left-right direction of the vehicle, a pinion (steering pinion 86) meshing with the rack bar 87, and a rack guide device 1. The rack guide device 1 includes: a housing wall portion 2 having an internal space S extending in a direction orthogonal to the rack bar 87, a first opening S1 opening from the internal space S toward the rack bar 87, and a second opening S2 opening from the internal space S in a direction opposite to the rack bar 87; an adjustment cover 10 closing the second opening S2 of the housing wall portion 2; a pressure pad 30 disposed in the internal space S and abutting against the rack bar 87 from the first opening S1; and a coil spring 40 and an O-ring (a second O-ring 52) disposed between the adjustment cover 10 and the pressure pad 30. One of the adjustment cover 10 and the pressure pad 30 includes an opposing surface 20 opposing the other of the adjustment cover 10 and the pressure pad 30. An annular groove 23 for assembling an O-ring (second O-ring 52) is provided on the opposing surface 20. The inner surface of the annular groove 23 has an inner peripheral surface 25 and an outer peripheral surface 26 facing each other. The annular groove 23 has a narrow groove 28 and a wide groove 29, wherein the groove width between the inner peripheral surface 25 and the outer peripheral surface 26 of the narrow groove 28 is smaller than the wire diameter W1 of the O-ring (second O-ring 52) before assembly, and the groove width of the wide groove 29 is larger than the wire diameter W1 of the O-ring (second O-ring 52) before assembly.

[0083] According to the first embodiment, the filling rate of the second O-ring 52 in the narrow groove 28 is high. Therefore, the pressure pad 30 is difficult to contact the adjustment cover 10, and the generation of contact sound can be suppressed. In addition, when the second O-ring 52 is assembled, the air in the closed space Q1 is discharged from the depth direction gap Q2. Therefore, the second O-ring 52 can be pressed into the annular groove 23 with a small force. Therefore, it is easy to assemble the second O-ring 52 into the annular groove 23.

[0084] In addition, the outer peripheral surface 26 of the annular groove 23 of embodiment 1 has: (one or) a plurality of outer peripheral arc surfaces 26a, which extend in the circumferential direction with a predetermined diameter; and (one or) a plurality of outer peripheral bulging surfaces 26b, which bulge outward in the radial direction than the outer peripheral arc surface 26a. The diameter of the inner peripheral surface 25 is constant over the entire circumference. The narrow groove 28 is arranged between the outer peripheral arc surface 26a and the inner peripheral surface 25. The wide groove 29 is arranged between the outer peripheral bulging surface 26b and the inner peripheral surface 25.

[0085] In addition, the facing surface 20 of the first embodiment includes a first annular surface 22 disposed on the inner peripheral side of the annular groove 23 and a second annular surface 24 disposed on the outer peripheral side of the annular groove 23. The first annular surface 22 protrudes toward the pressure pad 30 (the other of the adjustment cover 10 and the pressure pad 30) more than the second annular surface 24, and becomes a collision surface to which the collision load from the pressure pad 30 (the other of the adjustment cover 10 and the pressure pad 30) is input.

[0086] According to the first embodiment, even if the outer peripheral bulging surface 26 b is provided on the facing surface 20 , the strength of the first annular surface 22 can be maintained. Therefore, the durability of the adjustment cover 10 is maintained.

[0087] In the first embodiment, the cross-sectional shape of the O-ring (the second O-ring 52 ) before assembly is a circle.

[0088] Embodiment 1 has been described above, but the present disclosure is not limited to the example shown in Embodiment 1. In Embodiment 1, an example of an electric power steering device 80 applied to an auxiliary device is listed, but the present disclosure can also be applied to a steering device that does not have an auxiliary device. In addition, in the case where the auxiliary device has an auxiliary pinion, the present disclosure can also be applied to a rack guide device that presses the rack rod 87 toward the auxiliary pinion. In addition, with respect to the O-ring (second O-ring 52), in the present embodiment, the cross-sectional shape before assembly is formed into a circular shape, but the present disclosure can also be an O-ring whose cross-sectional shape before assembly is rectangular, without particular limitation.

[0089] In addition, in Embodiment 1, four wide grooves 29 are provided, but the present disclosure may also be one wide groove 29, and the number of wide grooves 29 is not limited. In addition, in Embodiment 1, four wide grooves 29 are arranged at equal intervals in the circumferential direction, but the present disclosure may not be arranged at equal intervals. In addition, the wide groove 29 of Embodiment 1 is composed of a bulging outer peripheral surface and an inner peripheral surface, but the present disclosure is not limited to this. The wide grooves of other embodiments are described below. In addition, in the following description, the differences from the rack guide device 1 of Embodiment 1 are concentrated.

[0090] (Implementation Method 2)

[0091] Fig.12 1 is a diagram of the adjustment cover of Embodiment 2 viewed from the first direction. The rack guide device 1A of Embodiment 2 is different from Embodiment 1 in that the diameter of the outer peripheral surface 26 of the annular groove 23 is constant over the entire circumference. In addition, the inner peripheral surface 25 of the annular groove 23 is different from Embodiment 1 in that it has four inner peripheral arc surfaces 25a extending in the circumferential direction with a predetermined diameter and four inner peripheral bulging surfaces 25b bulging radially inwardly from the inner peripheral arc surfaces 25a.

[0092] Therefore, the narrow groove 28A of the second embodiment is arranged between the outer peripheral surface 26 and the inner peripheral arc surface 25a. In addition, the wide groove 29A is arranged between the outer peripheral surface 26 and the inner peripheral bulging surface 25b. Moreover, according to the second embodiment, when the second O-ring 52 is assembled, a depth direction gap Q2 is generated between the second O-ring 52 and the outer peripheral surface 26, or between the second O-ring 52 and the outer peripheral surface 26 and the inner peripheral bulging surface 25b. Therefore, the air in the closed space Q1 is pushed out by the second O-ring 52 and flows to the depth direction gap Q2 side, and is discharged from the annular groove 23. Therefore, the second O-ring 52 can be easily assembled to the annular groove 23.

[0093] In addition, although four inner peripheral bulged surfaces 25 b and four wide grooves 29A are provided in the second embodiment, the present disclosure may also provide one inner peripheral bulged surface 25 b and four wide grooves 29A, and the number of the inner peripheral bulged surface 25 b and four wide grooves 29A is not limited.

[0094] (Implementation 3)

[0095] Fig.13 1 is a diagram of the adjustment cover of Embodiment 3 observed from the first direction. The rack guide device 1B of Embodiment 3 is different from Embodiment 1 in the inner peripheral surface 25 of the annular groove 23. In detail, the inner peripheral surface 25 is different from Embodiment 1 in that it has four inner peripheral arc surfaces 25a extending circumferentially with a predetermined diameter and four inner peripheral bulging surfaces 25b bulging radially inwardly than the inner peripheral arc surfaces 25a. In addition, the inner peripheral bulging surfaces 25b are arranged at a 45° offset relative to the outer peripheral bulging surfaces 26b. That is, the inner peripheral bulging surfaces 25b and the outer peripheral bulging surfaces 26b are arranged at a circumferential offset from each other.

[0096] Therefore, the narrow groove 28B of the third embodiment is arranged between the outer arc surface 26a and the inner arc surface 25a. In addition, the wide groove 29B is arranged between the outer arc surface 26a and the inner bulging surface 25b, and between the outer bulging surface 26b and the inner arc surface 25a. As described above, the rack guide device 1B of the third embodiment has eight wide grooves 29B. When the second O-ring 52 is assembled, the air in the closed space Q1 flows to the depth direction gap Q2 and is discharged from the annular groove 23. Therefore, the second O-ring 52 can be easily assembled to the annular groove 23.

[0097] Embodiment 3 has been described above, but the present disclosure may also be a form in which the inner peripheral bulged surface 25b and the outer peripheral bulged surface 26b overlap in the radial direction. In such a case, the wide groove 29B is arranged between the outer peripheral bulged surface 26b and the inner peripheral bulged surface 25b.

[0098] (Implementation 4)

[0099] Fig.14 This is a diagram of the adjustment cover according to the fourth embodiment as viewed from the first direction. Fig.15is a cross-sectional view of the moment when the second O-ring abuts against the first bottom surface in Embodiment 4, and more specifically, Fig.14 The sectional view along the XV-XV line. Fig.14 As shown, the rack guide device 1C of the fourth embodiment is different from the first embodiment in that the outer peripheral bulge surface is changed from four to one. In addition, the bottom surface 27 of the annular groove 23 is different from the first embodiment in that it has a first bottom surface 27a and a second bottom surface 27b. Fig.15 As shown, the second bottom surface 27b is arranged closer to the second direction Y2 than the first bottom surface 27a. That is, the second bottom surface 27b is farther from the facing surface 20 than the first bottom surface 27a. The bottom surface 27 of the narrow groove 28 is the first bottom surface 27a. The bottom surface 27 of the wide groove 29 is the second bottom surface 27b.

[0100] Next, the effects of the rack guide device 1C according to the fourth embodiment will be described. Fig.15 As shown in FIG. 2 , in the process of assembling the second O-ring 52 into the annular groove 23, the second O-ring 52 is pressed into the annular groove 23 from the first direction Y1. Fig.15 As shown, the second O-ring 52 contacts the first bottom surface 27a. Then, by further pressing the second O-ring 52, the second O-ring 52 is crushed, and the filling rate increases.

[0101] Here, in the narrow groove 28C, when the second O-ring 52 contacts the first bottom surface 27a, an inner peripheral gap Q3 is generated at the inner peripheral corner 15, and an outer peripheral gap Q4 is generated at the outer peripheral corner 16. In addition, in the wide groove 29C, the second O-ring 52 does not contact the second bottom surface 27b. Therefore, a radial gap Q5 extending in the radial direction is generated between the second O-ring 52 and the second bottom surface 27b.

[0102] The radial gap Q5 extends from the inner peripheral surface 25 to the outer peripheral bulging surface 26b and is continuous with the depth direction gap Q2. The inner peripheral gap Q3 of the inner peripheral corner 15 and the outer peripheral gap Q4 of the outer peripheral corner 16 are continuous in the circumferential direction and are annular. In addition, a portion of the inner peripheral gap Q3 of the inner peripheral corner 15 in the circumferential direction is continuous with the radial gap Q5. In addition, a portion of the outer peripheral gap Q4 of the outer peripheral corner 16 in the circumferential direction is continuous with the depth direction gap Q2.

[0103] Therefore, when the second O-ring 52 is further pressed in from the moment when the second O-ring 52 contacts the first bottom surface 27a, the air in the inner peripheral gap Q3 is pushed out toward the radial gap Q5. Thus, the air moved to the radial gap Q5 moves toward the depth gap Q2 and is discharged from the annular groove 23. In addition, the air in the outer peripheral gap Q4 is pushed out toward the depth gap Q2 and is discharged from the annular groove 23.

[0104] Therefore, when the second O-ring 52 is further pressed in from the moment when the second O-ring 52 contacts the first bottom surface 27a, the air resistance acting on the second O-ring 52 is small. Therefore, the second O-ring 52 can be pressed in with a small force, and the second O-ring can be easily assembled in the annular groove 23.

[0105] In the above, the fourth embodiment is described, but the second bottom surface 27b can also be applied to the bottom surface 27 of the wide groove 29A arranged between the outer peripheral surface 26 and the inner peripheral bulging surface 25b shown in the second embodiment. In addition, in the present embodiment, the facing surface 20 having the annular groove 23 is provided on the adjustment cover 10 side for assembling the second O-ring 52, but the present disclosure is not limited thereto. That is, the back surface 35 of the pressure pad 30 can also be used as the facing surface 20, and the annular groove 23 can be provided on the pressure pad 30 for assembling the second O-ring 52.

[0106] In addition, the present disclosure may be a combination of the following structures.

[0107] (1) A rack guide device, comprising: a housing wall portion having an internal space extending in a direction perpendicular to a rack bar, a first opening opening from the internal space toward the rack bar, and a second opening opening from the internal space in a direction opposite to the rack bar; an adjustment cover closing the second opening of the housing wall portion; a pressure pad disposed in the internal space and abutting against the rack bar from the first opening; a coil spring and an O-ring disposed between the adjustment cover and the pressure pad, one of the adjustment cover and the pressure pad having an opposing surface opposing the other of the adjustment cover and the pressure pad, an annular groove for assembling the O-ring being provided on the opposing surface, the inner surface of the annular groove having an inner peripheral surface and an outer peripheral surface opposing each other, the annular groove having: a narrow groove having a groove width between the inner peripheral surface and the outer peripheral surface smaller than a wire diameter of the O-ring before assembly; and a wide groove having a groove width larger than a wire diameter of the O-ring before assembly.

[0108] (2) A rack guide device according to (1), wherein the outer peripheral surface comprises: one or more outer peripheral arc surfaces extending circumferentially with a specified diameter; and one or more outer peripheral bulging surfaces bulging radially outwardly than the outer peripheral arc surface, the diameter of the inner peripheral surface is constant over the entire circumference, the narrow groove is arranged between the outer peripheral arc surface and the inner peripheral surface, and the wide groove is arranged between the outer peripheral bulging surface and the inner peripheral surface.

[0109] (3) A rack guide device according to (2), wherein the opposing surface comprises: a first annular surface, which is arranged on the inner peripheral side of the annular groove; and a second annular surface, which is arranged on the outer peripheral side of the annular groove, and the first annular surface protrudes toward the other side of the adjustment cover and the pressure pad more than the second annular surface, and becomes a collision surface to which the collision load from the other side of the adjustment cover and the pressure pad is input.

[0110] (4) A rack guide device according to (1), wherein the inner peripheral surface comprises: one or more inner peripheral arc surfaces extending circumferentially with a specified diameter; and one or more inner peripheral bulging surfaces bulging radially inwardly than the inner peripheral arc surface, the diameter of the outer peripheral surface is constant over the entire circumference, the narrow groove is arranged between the outer peripheral surface and the inner peripheral arc surface, and the wide groove is arranged between the outer peripheral surface and the inner peripheral bulging surface.

[0111] (5) A rack guide device according to (1), wherein the outer peripheral surface has: one or more outer peripheral arc surfaces extending circumferentially with a specified diameter; and one or more outer peripheral bulging surfaces bulging radially outward than the outer peripheral arc surface, and the inner peripheral surface has: one or more inner peripheral arc surfaces extending circumferentially with a specified diameter; and one or more inner peripheral bulging surfaces bulging radially inward than the inner peripheral arc surface, the narrow groove is arranged between the outer peripheral arc surface and the inner peripheral arc surface, and the wide groove is arranged between the outer peripheral bulging surface and the inner peripheral arc surface, between the outer peripheral arc surface and the inner peripheral bulging surface, or between the outer peripheral bulging surface and the inner peripheral bulging surface.

[0112] (6) The rack guide device according to any one of (1) to (5), wherein a cross-sectional shape of the O-ring before assembly is a circular shape.

[0113] (7) The rack guide device according to any one of (1) to (5), wherein a cross-sectional shape of the O-ring before assembly is a rectangular shape.

[0114] (8) A rack guide device according to any one of (1) to (7), wherein the inner surface of the annular groove has a bottom surface, the bottom surface has a first bottom surface and a second bottom surface that is farther away from the opposing surface than the first bottom surface, the bottom surface of the narrow groove is the first bottom surface, and the bottom surface of the wide groove is the second bottom surface.

[0115] (9) A steering device comprising: a rack bar extending in the left-right direction of a vehicle; a pinion gear meshing with the rack bar; and the rack guide device according to any one of (1) to (8).

[0116] Description of Reference Numerals

[0117] 1, 1A, 1B, 1C: rack guide device; 2: receiving wall; 10: adjustment cover; 30: pressure pad; 40: coil spring; 52: second O-ring (O-ring); 20: opposite surface; 21: first receiving hole; 22: first annular surface; 23: annular groove; 24: second annular surface; 25: inner peripheral surface; 25a: inner peripheral arc surface; 25b: inner peripheral bulging surface; 26: outer peripheral surface; 26a: outer peripheral arc surface; 26b: outer peripheral bulging surface; 27: bottom surface; 27a: first bottom surface; 27b: Second bottom surface; 28, 28A, 28B, 28C: narrow groove; 29, 29A, 29B, 29C: wide groove; 35: back side; 36: second receiving hole; Q1: closed space; Q2: depth direction gap; Q3: inner peripheral gap; Q4: outer peripheral gap; Q5: radial gap; S: internal space; S1: first opening; S2: second opening; 80: electric power steering device (steering device); 86: steering pinion (pinion); 87: rack rod; 89: pressed surface; 91: shell.

Claims

1. A rack guide device, wherein: The rack guide device comprises: a receiving wall portion having an inner space extending in a direction perpendicular to the rack bar, a first opening opening from the inner space toward the rack bar, and a second opening opening from the inner space in a direction opposite to the rack bar; an adjusting cover, which closes the second opening of the receiving wall; a pressure pad disposed in the internal space and abutting against the rack rod from the first opening; A coil spring and an O-ring are disposed between the adjustment cover and the pressure pad. One of the adjustment cover and the pressure pad has an opposing surface that is opposed to the other of the adjustment cover and the pressure pad. The opposing surface is provided with an annular groove for assembling the O-ring. The inner surface of the annular groove has an inner peripheral surface and an outer peripheral surface facing each other. The annular groove has: a narrow groove, wherein the groove width between the inner circumferential surface and the outer circumferential surface of the narrow groove is smaller than the wire diameter of the O-ring before assembly; and A wide groove, wherein the groove width of the wide groove is larger than the wire diameter of the O-ring before assembly.

2. The rack guide device according to claim 1, wherein: The outer peripheral surface has: One or more outer circumferential arc surfaces extending circumferentially with a specified diameter; and One or more peripheral bulging surfaces, which bulge radially outwards from the peripheral arc surface, The diameter of the inner circumference is constant over the entire circumference, The narrow groove is arranged between the outer arc surface and the inner surface. The wide groove is arranged between the outer peripheral bulging surface and the inner peripheral surface.

3. The rack guide device according to claim 2, wherein: The opposing surface has: A first annular surface disposed on an inner circumference side of the annular groove; and a second annular surface disposed on an outer peripheral side of the annular groove, The first annular surface protrudes toward the other of the adjustment cover and the pressure pad more than the second annular surface, and serves as a collision surface to which a collision load from the other of the adjustment cover and the pressure pad is input.

4. The rack guide device according to claim 1, wherein: The inner circumference has: One or more inner circumferential arc surfaces extending circumferentially with a specified diameter; and One or more inner circumferential bulging surfaces, which bulge radially inwards than the inner circumferential arc surface, The diameter of the outer peripheral surface is constant over the entire circumference, The narrow groove is arranged between the outer peripheral surface and the inner peripheral arc surface. The wide groove is arranged between the outer peripheral surface and the inner peripheral bulging surface.

5. The rack guide device according to claim 1, wherein: The outer peripheral surface has: One or more outer circumferential arc surfaces extending circumferentially with a specified diameter; and One or more peripheral bulging surfaces, which bulge radially outwards from the peripheral arc surface, The inner circumference has: One or more inner circumferential arc surfaces extending circumferentially with a specified diameter; and One or more inner circumferential bulging surfaces, which bulge radially inwards than the inner circumferential arc surface, The narrow groove is arranged between the outer arc surface and the inner arc surface. The wide groove is arranged between the outer peripheral bulging surface and the inner peripheral arc surface, between the outer peripheral arc surface and the inner peripheral bulging surface, or between the outer peripheral bulging surface and the inner peripheral bulging surface.

6. The rack guide device according to claim 1, wherein: The cross-sectional shape of the O-ring before assembly is circular.

7. The rack guide device according to claim 1, wherein: The cross-sectional shape of the O-ring before assembly is rectangular.

8. The rack guide device according to claim 1, wherein: The inner surface of the annular groove has a bottom surface, The bottom surface has: first bottom surface; as well as a second bottom surface which is further away from the opposing surface than the first bottom surface, The bottom surface of the narrow groove is the first bottom surface, The bottom surface of the wide groove is the second bottom surface.

9. A steering device, wherein: The steering device comprises: The rack bar extends in the left-right direction of the vehicle; A pinion gear meshing with the rack rod; and The rack guide device according to any one of claims 1 to 8.

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