Steering system and vehicle

Abstract

The utility model discloses a steering system and a vehicle, the steering system includes: a steering mechanism including: a steering column and a steering wheel, the steering wheel is fixed at the top end of the steering column, the tail end of the steering column is provided with an input gear; the limiting mechanism comprises a dust cover, a rack and a positioning gear, the input gear and the positioning gear are located in the dust cover, the rack can slide relative to the dust cover, the two sides of the rack in the width direction are provided with a first tooth part and a second tooth part respectively, the input gear is meshed with the first tooth part, and the positioning gear is meshed with the second tooth part. And the positioning gear is rotationally connected relative to the dust cover and is meshed with the second tooth part. Wherein the rack is clamped between the input gear and the positioning gear, the input gear is matched with the positioning gear, friction force feedback of the rack is increased in the process that the input gear rotates along with the steering wheel, and good driving experience is provided for a user.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a steering system and a vehicle. Background Art

[0002] The steering system is one of the important systems of an automobile chassis. The function of the steering system is to transmit the torque applied by the driver on the steering wheel to the wheels through components such as the steering column and the intermediate shaft, and during the transmission of force, provide and increase the power assist, and at the same time generate deformation during the transmission of displacement, so as to achieve the purpose of vehicle steering.

[0003] In the traditional structure, the limit of the steering wheel is achieved by the limit of the steering gear rack stroke. However, with the development of technology, the steer-by-wire system realizes the mechanical decoupling of the steering column and the steering gear, making the original limit type unable to be used continuously. Using the hand force simulation with motor feedback and the limit of high-power motors will lead to a significant increase in cost and weight. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a steering system, in which a rack is clamped between an input gear and a positioning gear, and the input gear and the positioning gear cooperate to increase the frictional force feedback of the rack during the rotation of the input gear with the steering wheel, providing a good driving experience for users.

[0005] The utility model also provides a vehicle.

[0006] The steering system according to the first aspect embodiment of the utility model includes: a steering mechanism, including: a steering column and a steering wheel, the steering wheel is fixed to the top end of the steering column, and an input gear is provided at the end of the steering column; a limiting mechanism, including: a dust cover, a rack and a positioning gear, the input gear and the positioning gear are located inside the dust cover, the rack is slidable relative to the dust cover and is respectively provided with a first tooth portion and a second tooth portion on both sides in the width direction, the input gear meshes with the first tooth portion, and the positioning gear is rotatably connected to the dust cover and meshes with the second tooth portion.

[0007] In the steering system according to the embodiment of the utility model, the rack is clamped between the input gear and the positioning gear, and the input gear and the positioning gear cooperate to increase the frictional force feedback of the rack during the rotation of the input gear with the steering wheel, providing a good driving experience for users.

[0008] In the steering system according to the embodiment of the utility model, the limiting mechanism further includes: two first elastic members, one ends of the two first elastic members are respectively connected to both ends in the length direction of the rack, and the other ends of the two first elastic members away from the rack are respectively connected to both ends of the dust cover.

[0009] According to some embodiments of the present utility model, two mounting seats are arranged inside the dust cover, and the two mounting seats are respectively arranged on both sides of the rack in the length direction; and, the limiting mechanism further includes: two second elastic members, the two second elastic members are respectively arranged on both sides of the rack in the length direction and extend along the length direction of the rack, and the two second elastic members are respectively connected to the mounting seats.

[0010] According to some embodiments of the present utility model, positioning columns are arranged at both ends of the rack in the length direction, the positioning columns extend along the length direction, and the positioning columns are selectively and positioningly matched with the second elastic members.

[0011] According to some embodiments of the present utility model, first mounting portions are arranged at both ends of the rack in the length direction, second mounting portions are arranged on the mounting seats, one end of the first elastic member is connected to the first mounting portion and the other end is connected to the second mounting portion, and the connection line between the first mounting portion and the second mounting portion is parallel to the rack.

[0012] According to some embodiments of the present utility model, a first sliding portion is arranged on the dust cover, a second sliding portion is arranged on the rack in the length direction, and the first sliding portion and the second sliding portion are slidably connected.

[0013] According to some embodiments of the present utility model, the first sliding portion is one of a sliding groove and a sliding block, the second sliding portion is the other of the sliding groove and the sliding block, and the sliding block is slidably connected to the sliding groove.

[0014] According to some embodiments of the present utility model, the input gear has a straight tooth structure and the tooth pitches of the first tooth portions are consistent; or, the input gear has a helical tooth structure and the tooth pitches of the first tooth portions gradually decrease from the middle to both sides.

[0015] According to some embodiments of the present utility model, there are two positioning gears, and the projections of the two positioning gears on the dust cover are symmetrically arranged with respect to the center line perpendicular to the rack of the input gear.

[0016] The vehicle according to the second aspect embodiment of the present utility model includes: the steering system.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of one direction of a steering system according to an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of another direction of the steering system according to an embodiment of the present invention;

[0021] Figure 3 is according to Figure 2 is a cross-sectional view;

[0022] Figure 4 is an exploded view of the steering system according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 100, steering system;

[0025] 11, steering column; 111, input gear;

[0026] 21, dust cover; 211, mounting seat; 212, second mounting portion; 213, first sliding portion; 22, rack; 221, first tooth portion; 222, second tooth portion; 223, positioning post; 224, first mounting portion; 225, second sliding portion; 23, positioning gear; 24, first elastic member; 25, second elastic member. Detailed implementation manners

[0027] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0028] Reference will be made below to Figures 1-4 to describe the steering system 100 according to an embodiment of the present invention, and a vehicle including the above-mentioned steering system 100 is also proposed.

[0029] Combined with Figures 1-4 as shown, the steering system 100 includes: a steering mechanism and a limiting mechanism. The steering mechanism includes: a steering column 11 and a steering wheel, and the steering wheel is fixed to the top end of the steering column 11. When the user rotates the steering wheel, the steering wheel and the steering column 11 rotate coaxially, driving the steering column 11 to rotate so as to adjust the direction of the wheels.

[0030] As Figure 1 and Figure 2As shown, an input gear 111 is provided at the end of the steering column 11. The input gear 111 is fixedly connected to the lower end of the steering column 11. When the steering column 11 rotates, the input gear 111 is driven to rotate, and the steering column 11 and the input gear 111 rotate coaxially, that is, the input gear 111 rotates coaxially with the steering wheel, and the rotation angle of the steering wheel is consistent with the rotation angle of the input gear 111. A plurality of active teeth are provided on the peripheral side of the input gear 111, and the plurality of active teeth are evenly distributed around the outer peripheral side of the input gear 111.

[0031] Further, the limiting mechanism includes: a dust cover 21, a rack 22 and a positioning gear 23, the rack 22 is slidably arranged in the dust cover 21, the rack 22 is respectively provided with a first tooth portion 221 and a second tooth portion 222 on both sides in the width direction, the positioning gear 23 and the input gear 111 are located in the dust cover 21 and mesh with the first tooth portion 221, the positioning gear 23 is rotatably connected relative to the dust cover 21 and meshes with the second tooth portion 222. Specifically, the input gear 111 is rotatably connected to the dust cover 21, and the input gear 111 can rotate relative to the dust cover 21. Along the length direction of the rack 22, a plurality of first driven teeth are arranged on the first tooth portion 221, and the plurality of first driven teeth are evenly distributed along the side of the rack 22 toward the input gear 111, the input gear 111 and the first tooth portion 221 mesh with each other, and the steering wheel is transmission-connected with the first tooth portion 221.

[0032] like Figure 1 and Figure 2 As shown, the positioning gear 23 is arranged on the side of the rack 22 away from the input gear 111, the positioning gear 23 and the input gear 111 are respectively arranged on the opposite sides of the rack 22, the opposite sides of the rack 22 are respectively provided with a first tooth portion 221 and a second tooth portion 222, the input gear 111 is meshed with the first tooth portion 221, and the positioning gear 23 is meshed with the second tooth portion 222, so that the rack 22 is sandwiched between the positioning gear 23 and the input gear 111. A plurality of second driven teeth are arranged on the second tooth portion 222, and a plurality of third driven teeth are arranged on the positioning gear 23, and the plurality of third driven teeth are evenly distributed around the circumference of the positioning gear 23.

[0033] The rack 22 is sandwiched between the input gear 111 and the positioning gear 23. When the input gear 111 rotates, the rack 22 moves along the length direction, driving the positioning gear 23 to rotate. The friction feedback of the rack 22 can be adjusted by the tolerance matching of the positioning gear 23 and the input gear 111.

[0034] The tooth pitch of the second driven teeth is inconsistent with that of the first driven teeth, and the tooth pitch between the plurality of second driven teeth is smaller than the tooth pitch between the plurality of first driven teeth, so as to increase the friction feedback of the rack 22 when the input gear 111 rotates with the steering wheel, thereby providing users with a good driving experience and improving the competitiveness of the vehicle.

[0035] Thus, the rack 22 is clamped between the input gear 111 and the positioning gear 23. The input gear 111 and the positioning gear 23 cooperate with each other to increase the frictional force feedback of the rack 22 during the rotation of the input gear 111 with the steering wheel, providing a good driving experience for the user.

[0036] As Figure 1 、 Figure 2 and Figure 4 shown, the limiting mechanism further includes: two first elastic members 24. One ends of the two first elastic members 24 are respectively connected to two ends in the length direction of the rack 22, and the other ends of the two first elastic members 24 departing from the rack 22 are respectively connected to two ends of the dust cover 21. Specifically, the two first elastic members 24 are respectively arranged at two ends in the length direction of the rack 22. When the steering wheel rotates, the input gear 111 rotates accordingly, and the rack 22 makes a linear motion toward one side or the other side in the length direction of the rack 22 under the drive of the input gear 111. The first elastic member 24 on the corresponding side is compressed, and the first elastic member 24 on the other side is stretched, so that during the rotation of the input gear 111 with the steering wheel, the first elastic member 24 generates a certain thrust on the input gear 111, providing torque feedback to the steering wheel.

[0037] Wherein, the first elastic member 24 can be a spring.

[0038] The steering wheel has limit positions, including: a first limit position and a second limit position. When the steering wheel rotates clockwise to the end, it is the first limit position, and when the steering wheel rotates counterclockwise to the end, it is the second limit position.

[0039] According to Figure 1 、 Figure 2 and Figure 4As shown, two mounting seats 211 are arranged inside the dust cover 21, and the two mounting seats 211 are respectively arranged on both sides of the rack 22 in the length direction. The limiting mechanism further includes: two second elastic members 25, the two second elastic members 25 are respectively arranged on both sides of the rack 22 in the length direction and extend along the length direction of the rack 22, and the two second elastic members 25 are respectively connected to the two mounting seats 211. Specifically, the second elastic member 25 is arranged above the first elastic member 24, and the second elastic member 25 is at the same height as the rack 22. One ends of the two second elastic members 25 are respectively connected to the two mounting seats 211, and the second elastic member 25 extends along the length direction of the rack 22. When the steering wheel rotates forward to the first limit position, the rack 22 moves along the length direction to abut against and have an interference fit with one of the second elastic members 25, and this second elastic member 25 has a reverse acting force on the rack 22 to physically limit the rack 22, and the second elastic member 25 reduces the impact force of the rack 22 reaching the first limit position; when the steering wheel rotates backward to the second limit position, the rack 22 moves along the length direction to abut against and have an interference fit with the other second elastic member 25, and this second elastic member 25 has a reverse acting force on the rack 22 to physically limit the rack 22, and the second elastic member 25 reduces the impact force of the rack 22 reaching the second limit position. Wherein, the second elastic member 25 can be a spring.

[0040] Therefore, on the one hand, the second elastic member 25 can ensure that the steering wheel does not cause impact discomfort due to instantaneous contact at the limit position; on the other hand, the second elastic member 25 is added to physically limit the rack 22.

[0041] As Figure 4 shown, positioning columns 223 are arranged at both ends of the rack 22 in the length direction, the positioning columns 223 extend along the length direction, and the positioning columns 223 are selectively in positioning cooperation with the second elastic member 25. Specifically, in the length direction of the rack 22, positioning columns 223 are respectively arranged at both ends of the rack 22. During the process of the steering wheel rotating to the limit position, when the rack 22 moves along the length direction to abut against any one of the second elastic members 25, the positioning column 223 is inserted into the second elastic member 25 to realize the positioning of the positioning column 223 and the second elastic member 25, and prevent the second elastic member 25 from being compressed and displaced when the rack 22 continues to move to the limit position.

[0042] According to Figure 1 and Figure 4As shown, first mounting portions 224 are provided at both ends of the rack 22 in the length direction. A second mounting portion 212 is provided on the mounting seat 211. One end of the first elastic member 24 is connected to the first mounting portion 224 and the other end is connected to the second mounting portion 212. The connection line between the first mounting portion 224 and the second mounting portion 212 is parallel to the rack 22. Specifically, the first mounting portion 224 is located on the side of the rack 22 away from the dust cover 21. The second mounting portion 212 is at the same height as the first mounting portion 224. Both ends of the first elastic member 24 are respectively connected to the first mounting portion 224 and the second mounting portion 212. When the rack 22 moves in one direction along the length direction, the first elastic member 24 on that side is compressed and the first elastic member 24 on the other side is stretched, generating a resistance to the movement of the rack 22 and providing a better user experience for the user.

[0043] Referring to Figures 1-4 As shown, a first sliding portion 213 is provided on the dust cover 21, and a second sliding portion 225 is provided on the rack 22. The first sliding portion 213 and the second sliding portion 225 are slidably connected. Specifically, the extending direction of the first sliding portion 213 is the same as the length direction of the rack 22, and the extending direction of the first sliding portion 213 is the moving direction of the rack 22. A second sliding portion 225 is provided on the side of the rack 22 connected to the dust cover 21. The second sliding portion 225 extends along the length direction of the rack 22. The first sliding portion 213 and the second sliding portion 225 are slidably connected so that the rack 22 moves in a straight line along the first sliding portion 213.

[0044] In some embodiments, the first sliding portion 213 is one of a chute and a slider, and the second sliding portion 225 is the other of a chute and a slider. The slider is slidably connected to the chute. Specifically, the first sliding portion 213 may be a chute, and the second sliding portion 225 may be a slider. The extending direction of the chute is the same as the extending direction of the slider. The slider is in limit fit and slidably connected to the chute so that the rack 22 is slidably connected to the dust cover 21. When the steering wheel rotates, the input gear 111 rotates accordingly, and the rack 22 slides along the chute under the drive of the input gear 111.

[0045] Among them, the first sliding portion 213 may be a slider, and the second sliding portion 225 may be a chute. The extending direction of the chute is the same as the extending direction of the slider. The slider is in limit fit and slidably connected to the chute so that the rack 22 is slidably connected to the dust cover 21. When the steering wheel rotates, the input gear 111 rotates accordingly, and the rack 22 slides along the slider under the drive of the input gear 111.

[0046] In some embodiments, the input gear 111 has a straight tooth structure, and the tooth pitches of the first tooth portions 221 are the same. Since the tooth pitches of the first tooth portions 221 are the same, during the rotation of the input gear 111, the force feedback received at any position is the same.

[0047] In some other embodiments, the input gear 111 has a helical tooth structure, and the tooth pitch of the first tooth portion 221 gradually decreases from the middle to both sides. When the input gear 111 has a helical tooth structure, it can adapt to different tooth pitches on the first tooth portion 221. Since the tooth pitch of the first tooth portion 221 gradually decreases from the middle position of the rack 22 to both sides, the force feedback of the steering wheel at different rotation angles is realized, bringing a better user experience.

[0048] As Figure 1 , Figure 2 and Figure 4 shown, there are two positioning gears 23, and the projections of the two positioning gears 23 on the dust cover 21 are symmetrically arranged about the center line of the input gear 111 perpendicular to the rack 22. Specifically, when the rack 22 is in the initial position (the steering wheel is returned to the straight position), the two positioning gears 23 are respectively arranged on both sides of the center line of the rack 22. During the process of the steering wheel rotating forward to the first limit position, one of the positioning gears 23 cooperates with the input gear 111 to adjust the frictional force feedback of the rack 22, providing a good user experience; during the process of the steering wheel rotating backward to the second limit position, the other positioning gear 23 cooperates with the input gear 111 to adjust the frictional force feedback of the rack 22, providing a good user experience.

[0049] The vehicle according to the second aspect embodiment of the present invention includes: a steering system 100. During the process of the steering wheel rotating to the limit position, the positioning gear 23 cooperates with the input gear 111 to adjust the frictional force feedback of the rack 22, providing a good user experience.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0052] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A steering system, characterized in that: include: A steering mechanism comprises: a steering column (11) and a steering wheel, wherein the steering wheel is fixed to the top end of the steering column (11), and an input gear (111) is provided at the bottom end of the steering column (11); The limiting mechanism comprises: a dust cover (21), a rack (22) and a positioning gear (23); the input gear (111), the rack (22) and the positioning gear (23) are located in the dust cover (21); the rack (22) can slide relative to the dust cover (21) and is respectively provided with a first tooth portion (221) and a second tooth portion (222) on both sides in a width direction; the input gear (111) is meshed with the first tooth portion (221); the positioning gear (23) is rotatably connected relative to the dust cover (21) and is meshed with the second tooth portion (222).

2. The steering system according to claim 1, characterized in that: The limiting mechanism further comprises: two first elastic members (24), one end of each of the two first elastic members (24) being respectively connected to two ends of the rack (22) in the length direction, and one end of each of the two first elastic members (24) being away from the rack (22) being respectively connected to two ends of the dust cover (21).

3. The steering system according to claim 2, characterized in that: Two mounting seats (211) are arranged in the dust cover (21), and the two mounting seats (211) are respectively arranged on both sides of the rack (22) in the length direction; as well as, The limiting mechanism further comprises: two second elastic members (25), the two second elastic members (25) being respectively arranged on both sides of the length direction of the rack (22) and extending along the length direction of the rack (22), and the two second elastic members (25) being respectively connected to the two mounting seats (211).

4. The steering system according to claim 3, characterized in that: Positioning columns (223) are provided at both ends of the rack (22) in the length direction. The positioning columns (223) extend along the length direction. The positioning columns (223) are selectively positioned and matched with the second elastic member (25).

5. The steering system according to claim 3, characterized in that: The rack (22) is provided with first mounting portions (224) at both ends in the length direction, the mounting seat (211) is provided with a second mounting portion (212), one end of the first elastic member (24) is connected to the first mounting portion (224) and the other end is connected to the second mounting portion (212), and a line connecting the first mounting portion (224) and the second mounting portion (212) is parallel to the rack (22).

6. The steering system according to claim 1, characterized in that: The dust cover (21) is provided with a first sliding portion (213), and the rack (22) is provided with a second sliding portion (225) in the length direction, and the first sliding portion (213) and the second sliding portion (225) are slidably connected.

7. The steering system according to claim 6, characterized in that: The first sliding portion (213) is one of a sliding groove and a sliding block, the second sliding portion (225) is the other of the sliding groove and the sliding block, and the sliding block is slidably connected to the sliding groove.

8. The steering system according to claim 1, characterized in that: The input gear (111) is a straight tooth structure, and the tooth pitches of the first tooth portions (221) are consistent; or, The input gear (111) is a helical gear structure, and the tooth pitch of the first tooth portion (221) gradually decreases from the middle to both sides.

9. The steering system according to claim 1, characterized in that: There are two positioning gears (23), and the projections of the two positioning gears (23) on the dust cover (21) are symmetrically arranged with respect to a center line of the input gear (111) perpendicular to the rack (22).

10. A vehicle, characterized in that: include: The steering system (100) according to any one of claims 1 to 9.

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