Steering-by-wire system and vehicle

Abstract

The utility model relates to the technical field of vehicle steering, in particular to a steer-by-wire system and a vehicle, and aims to solve the problems that an existing steer-by-wire system cannot realize mechanical self-locking and cannot lock steering of wheels. In order to achieve the purpose, the steer-by-wire system comprises a transmission part and a locking mechanism, and the transmission part is in transmission connection with wheels and used for driving the wheels to steer; the locking mechanism comprises a driving mechanism and a locking piece, the locking piece can lock the transmission piece, and the driving mechanism can drive the locking piece to lock the transmission piece, so that the wheels are locked and cannot steer; the locking mechanism can lock the wheels by locking the transmission piece when steering of the wheels needs to be locked, so that the wheels cannot be steered.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle steering, and specifically provides a wire-controlled steering system and a vehicle. Background Art

[0002] With the development of technology, in order to save space in the vehicle and make the overall structure of the vehicle simpler, many vehicles now begin to use wire-controlled steering systems, that is, the steering wheel and the steering gear are connected through electronic communication rather than mechanical structure.

[0003] During the driving and parking process of the vehicle, the wheels need to be locked so that the vehicle cannot turn. However, the current wire-controlled steering system does not have a locking function, so when the wheels need to be locked, the steering of the wheels cannot be locked.

[0004] Therefore, the relevant field is in urgent need of a wire-controlled steering system and a vehicle to solve the above-mentioned technical problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the existing wire-controlled steering system cannot mechanically self-lock and cannot lock the wheel steering.

[0006] In a first aspect, the utility model provides a steer-by-wire system, the steer-by-wire system comprising:

[0007] A transmission member, which is drivingly connected to the wheel and is used to drive the wheel to turn;

[0008] The locking mechanism comprises a driving mechanism and a locking member, wherein the locking member can lock the transmission member, and the driving mechanism can drive the locking member to lock the transmission member.

[0009] In a specific embodiment of the above-mentioned wire-controlled steering system, the locking member is transmission-connected to the transmission member, the transmission member can drive the locking member to rotate, a first limiting portion is provided on the locking member, a second limiting portion is provided at the output end of the driving mechanism, and the driving mechanism can drive the second limiting portion to cooperate with the first limiting portion to lock the locking member, thereby locking the transmission member.

[0010] In a specific embodiment of the above-mentioned steer-by-wire system, one of the first limiting portion and the second limiting portion is a limiting groove, and the other is a limiting protrusion matching the limiting groove.

[0011] In a specific embodiment of the above-mentioned steer-by-wire system, the diameter of the limit groove gradually decreases from the opening to the bottom of the groove, and the minimum diameter at the opening is greater than the maximum diameter at the bottom of the groove;

[0012] The size of the limiting protrusion is matched with the limiting groove.

[0013] In a specific implementation of the above-mentioned steer-by-wire system, the limiting protrusion is in the shape of a polygonal pyramid.

[0014] In a specific embodiment of the above-mentioned steer-by-wire system, the first limiting portion is arranged at an end of the locking member, and the locking mechanism is located at an end of the locking member where the first limiting portion is arranged.

[0015] In a specific embodiment of the above-mentioned steer-by-wire system, a housing is further included, the locking member is rotatably disposed in the housing, and the locking mechanism is fixed to the housing.

[0016] In a specific embodiment of the above-mentioned steer-by-wire system, the transmission mechanism further includes bearings, the bearings are disposed at both ends of the locking member, and the bearings are embedded in the housing.

[0017] In a specific embodiment of the above-mentioned steer-by-wire system, an end cover is further included, the drive mechanism is integrated on the end cover, and the end cover is fixed on the housing.

[0018] In a specific embodiment of the above-mentioned steer-by-wire system, a locking portion is provided on the locking member, and the locking portion can cooperate with the transmission portion of the transmission member to lock the transmission portion;

[0019] The locking member is arranged at the output end of the driving mechanism, and the driving mechanism can drive the locking portion of the locking member to cooperate with the transmission portion of the transmission member to lock the transmission member.

[0020] In a second aspect, the utility model provides a vehicle, the vehicle comprising:

[0021] Vehicle body,

[0022] As described above, the steer-by-wire system is arranged on the vehicle body.

[0023] When adopting the above technical solution, the wire-controlled steering system of the utility model includes a transmission member and a locking mechanism. The transmission member is connected to the wheel for driving the wheel to steer; the locking mechanism includes a driving mechanism and a locking member. The locking member can lock the transmission member, and the driving mechanism can drive the locking member to lock the transmission member, thereby locking the wheel and making it unable to steer; the locking mechanism can lock the transmission member when it is necessary to lock the steering of the wheel, thereby locking the wheel and making it unable to steer.

[0024] Specifically, when a fault occurs in the steering-by-wire system or the electronic control fails, the transmission member can be locked through the locking mechanism, thereby locking the wheels, so that the front wheels will not swing, thereby ensuring the control of the entire vehicle and enabling the vehicle to be parked safely.

[0025] In addition, one of the first limiting part and the second limiting part is a limiting groove, and the other is a limiting protrusion matching the limiting groove. The diameter of the limiting groove gradually decreases from the opening to the bottom of the groove, and the minimum diameter at the opening is larger than the maximum diameter at the bottom of the groove; the size of the limiting protrusion is matched with the limiting groove. This gradual diameter type method can make the limiting protrusion inserted into the limiting groove even when the limiting protrusion and the limiting groove are not completely aligned, with better adaptability, driving the locking member to rotate, aligning the limiting protrusion and the limiting groove, and allowing the limiting protrusion to be inserted into place; thereby completing the locking of the locking member, and then locking the transmission member, so that the wheel cannot turn. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0027] Figure 1 It is a structural schematic diagram of a wire-controlled steering system provided in Embodiment 1 of the present utility model;

[0028] Figure 2 is a cross-sectional view of a steer-by-wire system provided in Embodiment 1 of the present utility model;

[0029] Figure 3 This is a schematic diagram of the partial structure of the wire control steering system provided in the first embodiment of the utility model. Figure 1 ;

[0030] Figure 4 This is a schematic diagram of the partial structure of the wire control steering system provided in the first embodiment of the utility model. Figure 2 ;

[0031] Figure 5 This is a partial structural diagram of the wire control steering system provided in the second embodiment of the present utility model. Figure 1 ;

[0032] Figure 6 This is a partial structural diagram of the wire control steering system provided in the second embodiment of the present utility model. Figure 2 .

[0033] List of reference numerals:

[0034] 1. Locking member; 11. First limiting portion; 12. Locking portion; 2. Driving mechanism; 21. Second limiting portion; 22. End cover; 221. Connecting ear; 3. Shell; 31. Bearing; 4. Transmission member; 5. Steering motor; 6. Outer shell; 7. Fixed shell. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0036] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In order to solve the problem that the existing wire control steering system cannot mechanically self-lock and cannot lock the wheel steering.

[0039] Embodiment 1

[0040] This embodiment discloses a vehicle, which includes a vehicle body and a wire-controlled steering system arranged on the vehicle body. Figure 1-4 As shown, the wire-controlled steering system includes a transmission mechanism, a locking mechanism, a housing assembly and a steering drive assembly.

[0041] Among them, Figure 1 and 2 As shown, the transmission mechanism includes a transmission member 4, a connecting rod and a steering knuckle. The locking member 1 is specifically a rack, and a transmission tooth is provided on the surface of one side thereof. The end of the transmission member 4 is connected to the connecting rod, and the connecting rod is connected to the wheel through the steering knuckle. When the transmission member 4 moves along its length direction, it can drive the wheel to deflect through the connecting rod to achieve vehicle steering control. When the transmission member 4 moves along its length direction, it can also drive the locking member 1 to rotate due to engagement with the locking member.

[0042] The housing assembly includes a housing 6, and the transmission member 4 is slidably arranged in the housing 6. Specifically, a slide groove can be arranged in the housing 6, and the transmission member 4 is slidably arranged in the slide groove. The steering drive assembly specifically includes a steering motor 5, which is connected to the transmission member 4 in a transmission manner, and is used to drive the transmission member 4 to move, and then drive the connecting rod to move, so as to drive the wheel to deflect for steering. Specifically, the steering motor 5 is fixed on the housing 6 (specifically, the housing of the steering motor 5 is integrated on the housing 6), and the axis of the steering motor 5 is arranged parallel to the transmission member 4. The output end of the steering motor 5 is provided with a gear, which is specifically a shaft gear, which is meshed with the transmission teeth of the transmission member 4. When the steering motor 5 drives the gear to rotate forward, the transmission member 4 can be moved in a first direction, and when the steering motor 5 drives the gear to rotate in the reverse direction, the transmission member 4 can be moved in a second direction, wherein the first direction and the second direction are opposite. The wheel can be swung to the left and to the right by rotating the steering motor 5 in different directions, so as to realize the free steering of the vehicle.

[0043] The steering motor 5 is connected to the vehicle's steering wheel steering system in communication. The steering wheel steering system includes a steering wheel and an angle detection member. The angle detection member is used to detect the rotation angle and direction of the steering wheel, thereby controlling the wire control steering system to control the steering of the vehicle. Moreover, the steering motor is specifically connected to the steering wheel steering system through line communication. Because wired transmission signals are more stable than wireless transmission signals, and the failure rate is also very low, the signal transmission quality and stability can be effectively guaranteed, thereby effectively ensuring the driving safety of the vehicle.

[0044] Specific reference Figure 2 and Figure 3 The locking mechanism includes a locking member 1 and a driving mechanism 2; the locking member 1 is connected to the transmission member 4 in a transmission manner. Specifically, the locking member 1 is a locking shaft, and the locking shaft is provided with shaft teeth, which mesh with the transmission teeth of the transmission member 4. When the transmission member 4 moves along its length direction, the locking shaft can be driven to rotate through the shaft teeth and the transmission teeth. The locking member 1 is provided with a first limiting portion 11, and a second limiting portion 21 at the output end of the driving mechanism 2. The driving mechanism 2 can drive the second limiting portion 21 to cooperate with the first limiting portion 11 to lock the locking member 1, and then lock the transmission member 4, so that the transmission member 4 cannot move, thereby making the wheel unable to turn. The driving mechanism 2 is a linear driving mechanism, which can specifically be an electric push rod, and of course, it can also be an electric cylinder or a pneumatic cylinder.

[0045] Among them, one of the first limiting part 11 and the second limiting part 21 is a limiting groove, and the other is a limiting protrusion matching the limiting groove. Specifically, the second limiting part 21 is preferably a limiting protrusion, and the first limiting part 11 is a limiting groove. When limiting is required, the driving mechanism 2 drives the limiting protrusion to insert into the limiting groove, so that the locking member 1 cannot rotate, and the locking member 1 is locked; after the locking member 1 is locked, the transmission member 4 cannot move, and then the wheel cannot turn.

[0046] When the steering-by-wire system fails or the wheel needs to be locked for parking, the control driving mechanism 2 drives the limiting protrusion to move toward the limiting groove so that the limiting protrusion is inserted into the limiting groove to lock the locking member 1 so that it cannot rotate, and then the transmission member 4 cannot move, so as to lock the wheel and make it impossible to turn. In addition, in normal parking, after the steering motor 5 is turned off, the control driving mechanism 2 drives the limiting protrusion to move toward the limiting groove so that the limiting protrusion is inserted into the limiting groove to lock the locking member 1 so that it cannot rotate, and then the transmission member 4 cannot move, so as to lock the wheel and make it impossible to turn.

[0047] It should be noted that regarding the first limiting portion 11 and the second limiting portion 21, although in this embodiment the second limiting portion 21 is a limiting protrusion and the first limiting portion 11 is a limiting groove, this is not a limitation of the present invention, and in other embodiments, those skilled in the art may also select the first limiting portion 11 to be a limiting protrusion and the second limiting portion 21 to be a limiting groove, or the first limiting portion 11 and the second limiting portion 21 to be both limiting protrusions and cross-arranged limiting protrusions, so that the two limiting protrusions can be plugged together to limit the locking member 1 so that it cannot rotate. This does not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0048] The diameter of the limiting groove gradually decreases from the opening to the bottom of the groove, and the minimum diameter at the opening is larger than the maximum diameter at the bottom of the groove; the size of the limiting protrusion is matched with the limiting groove. This gradual diameter change method can make the limiting protrusion inserted into the limiting groove even when the limiting protrusion and the limiting groove are not completely aligned, driving the locking member 1 to rotate, so that the limiting protrusion and the limiting groove are aligned, and the limiting protrusion can be inserted into place.

[0049] Regarding the shapes of the limiting groove and the limiting protrusion, it should be noted that although the limiting protrusion in the present embodiment is in the shape of a prism, this is not a limitation of the present invention. Without departing from the principles of the present invention, in other embodiments, the limiting protrusion may also be in the shape of a pyramid, and the shape of the limiting groove corresponding thereto may also be in the shape of a pyramid. These do not deviate from the basic principles of the present invention and shall fall within the scope of protection of the present invention.

[0050] The first limiting portion 11 is arranged at one end of the locking member 1, specifically at the end surface. The locking mechanism is arranged at the end of the locking member 1 where the first limiting portion 11 is arranged, so that the driving mechanism 2 can drive the second limiting portion 21 to cooperate with the first limiting portion 11 to limit the locking member 1 so that it cannot rotate, thereby locking the wheel so that it cannot turn.

[0051] The limiting protrusion is in the shape of a multi-prism, and the corresponding limiting groove is also in the shape of a multi-prism. Specifically, the limiting protrusion is in the shape of a pentagonal pyramid, and the limiting groove is also in the shape of a pentagonal pyramid.

[0052] Although the limiting protrusion in this embodiment is in the shape of a pentagonal pyramid, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, according to the required locking angle each time, it may also be in the shape of a hexagonal pyramid or an octagonal pyramid, etc. This does not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0053] In order to make the limiting protrusion cooperate with the limiting groove better, the two are arranged coaxially with the locking member 1, so that the limiting protrusion can be inserted into the limiting groove when rotating at any angle.

[0054] Regarding the positions of the limiting protrusion and the limiting groove, it should be noted that although the two are coaxially arranged in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, the limiting groove may be eccentrically arranged, and a plurality of limiting grooves may be arranged around the ring, so that the locking member 1 can be locked by rotating a certain angle, for example, 6 limiting grooves may be arranged around the ring, so that the locking member 1 can be locked every time it rotates 60°; or 8 limiting grooves may be arranged around the ring, so that the rotating shaft can be locked every time it rotates 45°. All of these do not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0055] The locking mechanism 2 includes a housing 3 and a bearing 31. The locking member 1 is rotatably disposed in the housing 3. The two ends of the locking member 1 are provided with bearings 31, and the bearings 31 are embedded in the housing 3. The bearing 31 at one end of the locking member 1 where the first limiting portion 11 is provided is a deep groove ball bearing, and the bearing 31 at the other end is a needle bearing. The locking member 1 is rotatably connected to the housing 3 through the bearing 1, so that the rotation of the locking member 1 is more stable; and after the locking member 1 is locked, there will be no shaking, etc.

[0056] Regarding the bearing 31, it should be noted that, although in this embodiment, the bearing 31 at the first end of the locking member 1 is a deep groove ball bearing, and the bearing 31 at the second end is a needle bearing, this is not a limitation of the present invention. Without departing from the basic principle of the present invention, in other embodiments, those skilled in the art may choose the bearings 31 at both ends to be the same, such as needle bearings or deep groove ball bearings, etc.; or the bearing 31 at the second end of the locking member 1 may be a deep groove ball bearing, and the bearing 31 at the first end may be a needle bearing. All of these do not depart from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0057] The housing 6 is fixedly connected to the housing 3, and the two can be fixed by bolts or integrally formed. The fixing of the housing 6 to the housing 3 enables the locking member 1 and the transmission member 4 to engage with each other, so that when the locking member 1 is locked, the movement of the transmission member 4 can be restricted, so that the wheel is locked and cannot turn.

[0058] The housing assembly further includes an end cover 22, on which the drive mechanism 2 is integrated. Specifically, a portion of the housing 6 is the end cover 22. The end cover 22 is fixed to the housing 3, so that when the drive mechanism 2 drives the limiting protrusion to move along the axis, the limiting protrusion can be inserted into the limiting groove. Figure 1 and Figure 4 The end cover 22 is fixed to the shell 3 by bolts. Specifically, a connecting ear 221 is provided on the end cover 22. The connecting ear 221 is provided with a through hole. A threaded hole corresponding to the through hole is provided on the shell 3. The bolts pass through the through hole and are connected to the shell 3 to fix the end cover 22 on the shell 3.

[0059] In other embodiments, connecting ears can also be provided on the shell 3 to connect the shell 3 and the connecting ears 221 on the end cover 22 to achieve a fixed connection between the end cover 22 and the shell 3. This is also in line with the basic principle of the utility model and will fall within the protection scope of the utility model.

[0060] Embodiment 2

[0061] like Figure 5 and 6 As shown, this embodiment discloses a vehicle, which includes a vehicle body and a wire-controlled steering system arranged on the vehicle body. The wire-controlled steering system includes a transmission mechanism, a locking mechanism, a housing assembly and a steering drive assembly.

[0062] The specific structure of the steer-by-wire system in this embodiment is substantially the same as that of the steer-by-wire system in the first embodiment, except for the specific structure of the locking mechanism.

[0063] The locking mechanism includes a locking member 1 and a driving mechanism 2. The locking member 1 is provided with a locking portion 12, which can cooperate with the transmission portion of the transmission member to lock the transmission member 4; specifically, the locking portion 12 is a plurality of locking teeth arranged at intervals, and after the locking teeth are engaged with the transmission teeth of the transmission member 4, the transmission member 4 can be locked to prevent it from moving, thereby preventing the wheel from turning.

[0064] The locking member 1 is arranged at the output end of the driving mechanism 2, and the driving mechanism 2 can drive the locking portion 12 of the locking member 1 to cooperate with the transmission portion of the transmission member 4 to lock the transmission member 4. Specifically, the locking member 1 is arranged on one side of the transmission member 4, and the driving mechanism 2 can drive the locking member 1 to move in a direction parallel to the transmission teeth of the transmission member 4. When it is necessary to lock the wheel so that it cannot turn, the driving mechanism 2 drives the locking member 1 to approach the transmission member 4, and makes the locking member 1 and the transmission member 4 at least partially overlap, so that the locking teeth can mesh with the transmission teeth, so that the transmission member 4 cannot move along its length direction. In order to enable the locking member 1 to provide sufficient locking force, the locking mechanism also includes a fixed shell 7, which is fixed on the outer shell 6, and a slide groove is arranged inside the fixed shell 7, and the locking member 1 is slidably arranged in the slide groove. After the locking member 1 is meshed with the transmission member 4, the fixed shell 7 mainly provides a restraining force to restrain the locking member 1 from moving along the length direction of the transmission member 4, and does not completely rely on the output end of the driving mechanism 2 to provide resistance, which can reduce the force on the driving mechanism 2 and increase its service life. The driving mechanism 2 is a linear driving mechanism, which may be an electric push rod, or an electric cylinder or a pneumatic cylinder.

[0065] When the steer-by-wire system fails or the wheels need to be locked for parking, the control drive mechanism 2 drives the locking member 1 to move toward the transmission member 4 so that the locking member 1 meshes with the transmission member 4, so that the transmission member 4 cannot move, thereby locking the wheels and making it impossible to turn. In addition, in normal parking, after the steering motor 5 is turned off, the control drive mechanism 2 drives the locking member 1 to move toward the transmission member 4 so that the locking member 1 meshes with the transmission member 4, so that the transmission member 4 cannot move, thereby locking the wheels and making it impossible to turn.

[0066] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A steer-by-wire system, characterized in that: It includes: A transmission member, which is drivingly connected to the wheel and is used to drive the wheel to turn; The locking mechanism comprises a driving mechanism and a locking member, wherein the locking member can lock the transmission member, and the driving mechanism can drive the locking member to lock the transmission member.

2. The steer-by-wire system according to claim 1, characterized in that: The locking member is in transmission connection with the transmission member, and the transmission member can drive the locking member to rotate. A first limiting portion is provided on the locking member, and a second limiting portion is provided at the output end of the driving mechanism. The driving mechanism can drive the second limiting portion to cooperate with the first limiting portion to lock the locking member, thereby locking the transmission member.

3. The steer-by-wire system according to claim 2, characterized in that: One of the first limiting portion and the second limiting portion is a limiting groove, and the other is a limiting protrusion matching the limiting groove.

4. The steer-by-wire system according to claim 3, characterized in that: The diameter of the limiting groove gradually decreases from the opening to the bottom of the groove, and the minimum diameter at the opening is larger than the maximum diameter at the bottom of the groove; The size of the limiting protrusion is matched with the limiting groove.

5. The steer-by-wire system according to claim 4, characterized in that: The limiting protrusion is in the shape of a polygonal pyramid.

6. The steer-by-wire system according to claim 5, characterized in that: The first limiting portion is arranged at the end of the locking member, and the locking mechanism is located at the end of the locking member where the first limiting portion is arranged.

7. The steer-by-wire system according to claim 4, characterized in that: It also includes a housing, the locking member is rotatably disposed in the housing, and the locking mechanism is fixed to the housing; and / or It also includes bearings, which are arranged at both ends of the locking member and are embedded in the housing.

8. The steer-by-wire system according to claim 7, characterized in that: It also includes an end cover, the driving mechanism is integrated on the end cover, and the end cover is fixed on the shell.

9. The steer-by-wire system according to claim 1, characterized in that: The locking member is provided with a locking portion, and the locking portion can cooperate with the transmission portion of the transmission member to lock the transmission portion; The locking member is arranged at the output end of the driving mechanism, and the driving mechanism can drive the locking portion of the locking member to cooperate with the transmission portion of the transmission member to lock the transmission member.

10. A vehicle, characterized in that: It includes: Vehicle body, The steer-by-wire system according to any one of claims 1 to 9, wherein the steer-by-wire system is arranged on the vehicle body.

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