Steering column locking assembly, steer-by-wire system and vehicle

Abstract

The invention relates to a steering column locking assembly, a steer-by-wire system and a vehicle. The steering column locking assembly comprises a column shell, a column mandrel, an upper locking disc, a lower locking disc, a return spring and a driving mechanism, and the upper locking disc is arranged at the end, located in the column shell, of the column mandrel; the lower locking disc and the upper locking disc are oppositely arranged; the return spring is arranged at the end between the interior of the tubular column shell and the lower locking disc; the driving mechanism is connected with the lower locking disc; when the driving mechanism is in a power-off state, the return spring drives the lower locking disc to abut against the upper locking disc, so that the lower locking disc and the upper locking disc are locked and fixed. The steering wheel cannot rotate freely in the power-off state, and therefore the steering wheel can provide auxiliary force for a driver to support the driver to get on the vehicle. In addition, the problem of angle difference between the upper locking disc and the lower locking disc does not exist.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle part manufacturing, in particular to a steering column locking assembly, a steer-by-wire system and a vehicle. BACKGROUND

[0002] The steer-by-wire system of a vehicle is an advanced system for controlling steering through electronic signals, which cancels the mechanical connection between the steering wheel and the steering wheel and realizes the steering function completely by electric energy. In the prior art, when the steer-by-wire system is in a powered-off state, the upper locking disc and the lower locking disc are disconnected, at this time the steering wheel can be freely rotated and cannot provide auxiliary force support to the driver to get on the vehicle. Moreover, when the steering wheel is rotated, the upper locking disc will be rotated together, so that there is an angle difference between the upper locking disc and the lower locking disc. When the steer-by-wire system is powered on, it takes a long time to align the upper locking disc and the lower locking disc, which affects the use experience. SUMMARY

[0003] One of the purposes of the present application is to provide a steering column locking assembly to solve the problem that the upper locking disc and the lower locking disc are disconnected when the steer-by-wire system is in a powered-off state in the prior art, and to avoid the angle difference between the upper locking disc and the lower locking disc. The second purpose is to provide a steer-by-wire system, and the third purpose is to provide a vehicle.

[0004] In order to achieve the above-mentioned purposes, the technical scheme adopted by the present application is as follows:

[0005] A steering column locking assembly, comprising:

[0006] a column housing;

[0007] a column shaft, the column shaft is arranged in the column housing;

[0008] an upper locking disc, the upper locking disc is arranged at one end of the column shaft in the column housing;

[0009] a lower locking disc, the lower locking disc is arranged in the column housing and is arranged opposite to the upper locking disc, and the lower locking disc is movable along the axial direction of the column housing;

[0010] at least one return spring, the return spring is arranged between the column housing and the lower locking disc;

[0011] a driving mechanism, the driving mechanism is arranged in the column housing and is connected with the lower locking disc;

[0012] When the driving mechanism is in the powered-off state, the return spring drives the lower locking disc to abut against the upper locking disc, so as to lock and fix the lower locking disc and the upper locking disc.

[0013] According to the above technical means, when the driving mechanism is in the powered-off state, the return spring drives the lower locking disc to abut against the upper locking disc, so as to lock and fix the lower locking disc and the upper locking disc. When the driving mechanism is in the powered-on state, the driving mechanism drives the lower locking disc to separate from the upper locking disc, so as to unlock the lower locking disc and the upper locking disc, thereby ensuring the normal use of the steer-by-wire system. Compared with the prior art, the steering wheel cannot be freely rotated in the powered-off state, so that the steering wheel can provide auxiliary force to support the driver to get on the vehicle. Moreover, the problem of the angle difference between the upper locking disc and the lower locking disc caused by the rotation of the steering wheel in the powered-off state can be avoided.

[0014] Further, the lower locking disc is further provided with a mounting cavity, and one end of the mounting cavity away from the upper locking disc is provided with a matching groove; the driving mechanism comprises a motor and a cam, the motor is connected with the column shell, the output end of the motor is connected with the cam, the cam is located in the mounting cavity, and the cam abuts against the matching groove;

[0015] When the driving mechanism is in the powered-off state, the base circle of the cam abuts against the matching groove.

[0016] According to the above technical means, since the matching groove is arranged at one end of the mounting cavity away from the upper locking disc, the cam abuts against the matching groove, and when the driving mechanism is in the powered-off state, the base circle of the cam abuts against the matching groove. Therefore, it can be ensured that the lower locking disc is in the highest position when the driving mechanism is in the powered-off state, so as to be locked and fixed with the upper locking disc. When the driving mechanism is in the powered-on state, the motor drives the cam to rotate, and the radius at which the cam abuts against the matching groove gradually increases, thereby driving the lower locking disc and the return spring to move away from the upper locking disc, so that the lower locking disc is unlocked from the upper locking disc, thereby ensuring the normal use of the steer-by-wire system.

[0017] Further, the cam is further provided with a limiting boss, and the matching groove is provided with an abutting protrusion, and when the driving mechanism is in the powered-on state, the motor drives the cam to rotate, so that the limiting boss abuts against the abutting protrusion.

[0018] According to the above technical means, the abutment of the limiting boss and the abutting protrusion can be used to limit the further rotation of the cam, thereby limiting the stroke of the downward movement of the lower locking disc.

[0019] Further, the lower locking disc is provided with a plurality of fixing grooves, the plurality of return springs are arranged along the circumference of the lower locking disc, and the plurality of return springs correspond to the plurality of fixing grooves one by one.

[0020] According to the above technical means, the plurality of return springs are arranged along the circumference of the lower locking disc, so that the uniformity of force on each part of the lower locking disc can be ensured, and the inclination of the lower locking disc during movement towards the upper locking disc under the elastic force of the return spring can be avoided, thereby ensuring the stability of the locking of the lower locking disc and the upper locking disc.

[0021] Further, the fixing groove is provided with a first guide column, the pipe column shell is provided with a second guide column, the first end of the return spring is sleeved on the first guide column, and the second end of the return spring is sleeved on the second guide column.

[0022] According to the above technical means, since the two ends of the return spring are sleeved on the first guide column and the second guide column respectively, the deformation direction of the return spring can be guided by the first guide column and the second guide column, and the return spring can be prevented from falling out of the fixing groove.

[0023] Further, the one end of the upper locking disc towards the lower locking disc is provided with an upper locking part, and the one end of the lower locking disc towards the upper locking disc is provided with a lower locking part.

[0024] When the driving mechanism is in the power-off state, the upper locking part cooperates with the lower locking part to lock and fix the lower locking disc and the upper locking disc.

[0025] According to the above technical means, since the upper locking part is arranged at the one end of the upper locking disc towards the lower locking disc, and the lower locking part is arranged at the one end of the lower locking disc towards the upper locking disc, the lower locking disc and the upper locking disc can be locked and fixed through the connection and cooperation of the upper locking part and the lower locking part.

[0026] Further, the upper locking part comprises a plurality of upper locking protrusions arranged along the circumference of the upper locking disc, and the lower locking part comprises a plurality of lower locking protrusions arranged along the circumference of the lower locking disc.

[0027] When the driving mechanism is in the power-off state, the lower locking protrusion is inserted between two adjacent upper locking protrusions to lock and fix the lower locking disc and the upper locking disc.

[0028] According to the above technical means, when the lower locking disc and the upper locking disc abut against each other under the driving of the return spring, the lower locking protrusion on the lower locking disc can be inserted between the two upper locking protrusions on the corresponding upper locking disc, so as to lock and fix the lower locking disc and the upper locking disc.

[0029] Further, the inner wall of the column housing is provided with a guide groove, and the outer circumferential side of the lower locking disc is provided with a guide rib, which is located in the guide groove.

[0030] According to the above technical means, through the cooperation of the guide rib on the outer circumferential side of the lower locking disc and the guide groove on the inner wall of the column housing, the lower locking disc can be guided to move up and down along the axial direction of the column housing, and at the same time, the inclination of the lower locking disc during movement can be avoided.

[0031] A steer-by-wire system comprises the steering column locking assembly according to any one of the above.

[0032] The steer-by-wire system of the embodiment can prevent the steering wheel from freely rotating in the power-off state, and can provide auxiliary force to support the driver to get on the vehicle. In addition, the problem of the angle difference between the upper locking disc and the lower locking disc caused by the rotation of the steering wheel in the power-off state can also be avoided.

[0033] A vehicle comprises the steer-by-wire system according to the above.

[0034] The vehicle of the embodiment can prevent the steering wheel from freely rotating in the power-off state of the steer-by-wire system, and can provide auxiliary force to support the driver to get on the vehicle. In addition, the problem of the angle difference between the upper locking disc and the lower locking disc caused by the rotation of the steering wheel in the power-off state can also be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A structural diagram of the steering column locking assembly provided by an embodiment of the present application;

[0036] Figure 2 A cooperation structure diagram of the cam and the lower locking disc provided by an embodiment of the present application;

[0037] Figure 3 A structural diagram of the upper locking disc provided by an embodiment of the present application;

[0038] Figure 4 A structural diagram of the lower locking disc provided by an embodiment of the present application;

[0039] Figure 5 A control method flowchart of the steer-by-wire system provided by an embodiment of the present application.

[0040] REFERENCE SIGNS:

[0041] 100 - column housing; 110 - second guide column; 120 - guide slot; 130 - avoidance slot;

[0042] 200 - column core;

[0043] 300 - upper locking disc; 310 - upper locking protrusion;

[0044] 400 - lower locking disc; 410 - mounting cavity; 411 - fitting slot; 412 - abutting protrusion; 420 - fixing slot; 421 - first guide column; 430 - lower locking protrusion; 440 - guide rib;

[0045] 500 - return spring;

[0046] 600 - driving mechanism; 610 - motor; 611 - motor output shaft; 620 - cam; 621 - limiting boss; 622 - assembly hole;

[0047] X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0048] Other advantages and benefits of the present application will become apparent to those skilled in the art upon consideration of the disclosure or can be learned by practice of the application. The disclosure can be realized and attained by means of the preferred embodiments, which are presented by way of example only and are not intended to limit the scope of the present application. The description herein is presented solely for the purpose of enabling those skilled in the art to make and use the application.

[0049] It should be noted that the drawings provided in the following embodiments are only schematic and are intended to provide the basic understanding of the application. In the drawings, the shape, number and size of components are not drawn according to the actual implementation, and the actual implementation of each component may be changed arbitrarily in shape, number and size, and the layout of the components may be more complex.

[0050] As described in the background, in the related art, when the steer-by-wire system is in the power-off state, the upper locking disc and the lower locking disc are disconnected, at this time the steering wheel can be freely rotated, and the driver cannot be provided with auxiliary force support to get on the vehicle. Moreover, when the steering wheel is rotated, the upper locking disc is also rotated, so that there is an angle difference between the upper locking disc and the lower locking disc. When the steer-by-wire system is powered on, it takes a long time to align the upper locking disc and the lower locking disc, which affects the use experience.

[0051] Therefore, the steering column locking assembly, the steer-by-wire system and the vehicle provided by the embodiments of the present application can drive the lower locking disc to abut against the upper locking disc in the power-off state, so that the lower locking disc and the upper locking disc are locked and fixed, and the steering wheel cannot be rotated, thereby providing auxiliary force support to the driver when getting on the vehicle. In addition, the problem that there is an angle difference between the upper locking disc and the lower locking disc caused by the rotation of the steering wheel in the power-off state can be avoided. In the power-on state, the lower locking disc and the upper locking disc are separated by the driving mechanism, so that the lower locking disc and the upper locking disc are unlocked, and the steering wheel can be rotated, thereby ensuring the normal use of the steer-by-wire system.

[0052] In the description of the embodiments, the first direction X, the second direction Y and the third direction Z are three different directions in a three-dimensional space, and the first direction X, the second direction Y and the third direction Z can be perpendicular to each other. For example, the first direction X and the second direction Y can be two diameters of the column housing 100 perpendicular to each other, and the third direction Z can be the axial direction of the column housing 100.

[0053] Please refer to Figures 1-4 The embodiments of the present application provide a steering column locking assembly, which comprises:

[0054] The column housing 100. Exemplarily, the column housing 100 is generally cylindrical, and a cavity is formed in the column housing 100 to install other components.

[0055] The column shaft 200, which is arranged in the column housing 100. Exemplarily, the column shaft 200 can be arranged in the column housing 100 along the third direction Z, and one end of the column shaft 200 located outside the column housing 100 can be connected to the steering wheel and can rotate integrally with the steering wheel.

[0056] The upper locking disc 300, which is arranged at one end of the column shaft 200 located in the column housing 100. Exemplarily, the upper locking disc 300 is generally disc-shaped, and can be integrally formed with the column shaft 200, or can be locked and fixed with the column shaft 200 by bolts or other fasteners.

[0057] The lower locking disc 400, which is arranged in the column housing 100 and opposite to the upper locking disc 300, and can move along the axial direction of the column housing 100. Exemplarily, the upper locking disc 300 and the lower locking disc 400 are arranged opposite to each other along the third direction Z, and the lower locking disc 400 is movably arranged in the column housing 100 and can move up and down along the third direction Z, so that the upper locking disc 300 and the lower locking disc 400 can be in contact or separated.

[0058] At least one return spring 500 is arranged between the pipe column shell 100 and the lower locking disc 400. Exemplarily, the return spring 500 can be arranged on the side of the lower locking disc 400 away from the upper locking disc 300, the first end of the return spring 500 abuts against the lower locking disc 400, and the first end of the return spring 500 can be fixedly connected to the end of the lower locking disc 400 away from the upper locking disc 300, for example, by welding. The second end of the return spring 500 abuts against the pipe column shell 100, and the second end of the return spring 500 can be fixedly connected to the pipe column shell 100 below the lower locking disc 400, for example, by welding. The return spring 500 can be elongated or shortened along the third direction Z.

[0059] A driving mechanism 600 is arranged in the pipe column shell 100 and connected to the lower locking disc 400. The driving mechanism 600 can drive the lower locking disc 400 to move along the third direction Z. Exemplarily, the driving mechanism 600 can include a motor, a hydraulic cylinder, a pneumatic cylinder, etc., and can be connected to the lower locking disc 400 through a cam, a gear rack, a piston rod, etc.

[0060] Specifically, the return spring 500 of the present embodiment can always be in a pre-tightened state. When the driving mechanism 600 is in a powered-off state, the elastic force of the return spring 500 drives the lower locking disc 400 to move to the side of the upper locking disc 300, and the lower locking disc 400 abuts against the upper locking disc 300 to lock and fix the lower locking disc 400 and the upper locking disc 300. It can be understood that, when the driving mechanism 600 is in the powered-off state, the present embodiment only relies on the elastic force of the return spring 500 to maintain the relative locking state of the lower locking disc 400 and the upper locking disc 300, without the intervention of other external forces, thereby facilitating the reduction of loss and the saving of cost.

[0061] When the driving mechanism 600 is in a powered-on state, the driving mechanism 600 drives the lower locking disc 400 to move away from the upper locking disc 300, and the lower locking disc 400 is separated from the upper locking disc 300 to unlock the lower locking disc 400 and the upper locking disc 300. At the same time, the lower locking disc 400 is also compressed when moving to store the elastic potential energy of the return spring 500.

[0062] As can be known from the above description, in the embodiment, at least one return spring 500 is arranged at the end of the lower locking disc 400 away from the upper locking disc 300, when the driving mechanism 600 is in the lower power state, the elastic force of the return spring 500 can drive the lower locking disc 400 to abut against the upper locking disc 300, so as to lock and fix the lower locking disc 400 and the upper locking disc 300. When the driving mechanism 600 is in the upper power state, the driving mechanism 600 drives the lower locking disc 400 to separate from the upper locking disc 300, so as to unlock the lower locking disc 400 and the upper locking disc 300, thereby ensuring the normal use of the steer-by-wire system. Compared with the prior art, in the lower power state, the steering wheel cannot be freely rotated, so the steering wheel can provide auxiliary force to support the driver to get on the vehicle. Moreover, the problem that there is an angle difference between the upper locking disc 300 and the lower locking disc 400 due to the rotation of the steering wheel in the lower power state can be avoided.

[0063] Please continue to refer to Figure 1 and Figure 2 In the embodiment, the lower locking disc 400 is further provided with a mounting cavity 410, which can be located at the side of the lower locking disc 400 away from the upper locking disc 300. The end of the mounting cavity 410 away from the upper locking disc 300 is provided with a matching groove 411, in combination with Figure 1 and Figure 2 It can be understood that the matching groove 411 can be located at the bottom end of the mounting cavity 410 in the third direction Z.

[0064] The driving mechanism 600 includes a motor 610 and a cam 620, the motor 610 is connected with the column housing 100, the output end of the motor 610 is connected with the cam 620, the cam 620 is located in the mounting cavity 410, and the cam 620 abuts against the matching groove 411. For example, the motor 610 of the embodiment can be mounted on the column housing 100 below the lower locking disc 400, the motor 610 can be located at the side of the cam 620 in the first direction X, the motor 610 can be connected with the cam 620 through a motor output shaft 611, and when the motor 610 rotates, the cam 620 can rotate in the plane composed of the second direction Y and the third direction Z, so as to drive the lower locking disc 400 to move through the cam 620. It can be understood that, in order to avoid the interference between the lower locking disc 400 and the motor 610 and the motor output shaft 611 when the lower locking disc 400 moves up and down in the third direction Z, a avoiding hole can be arranged at the end of the mounting cavity 410 away from the upper locking disc 300, so that part of the motor 610 can pass through the avoiding hole; and the motor output shaft 611 is arranged between the lower locking disc 400 and the column housing 100, and a sufficient gap is reserved between the motor output shaft 611 and the lower locking disc 400, so as to avoid the interference between the lower locking disc 400 and the motor output shaft 611 when the lower locking disc 400 moves.

[0065] Figure 2The cooperation structure of the cam 620 and the lower locking disc 400 when the driving mechanism 600 is in the powered-off state is shown. In this embodiment, when the driving mechanism 600 is in the powered-off state (i.e., when the motor 610 is in the powered-off state), the base circle of the cam 620 abuts against the cooperation groove 411. That is, when the driving mechanism 600 is in the powered-off state, the point on the surface of the cam 620 closest to the rotation center of the cam 620 abuts against the cooperation groove 411. At this time, the lower locking disc 400 is located at the highest position in the third direction Z, and the lower locking disc 400 is locked and fixed with the upper locking disc 300, and the steering wheel cannot be freely rotated.

[0066] When the driving mechanism 600 is in the powered-on state, the motor 610 drives the cam 620 to rotate, and the radius of the surface of the cam 620 abutting against the cooperation groove 411 gradually increases, thereby driving the lower locking disc 400 to move downward along the third direction Z as a whole, so that the lower locking disc 400 is separated from the upper locking disc 300, and the steering wheel can be freely rotated, thereby ensuring the normal use of the steer-by-wire system.

[0067] When the motor 610 is powered off, the elastic force of the return spring 500 drives the lower locking disc 400 to move toward the side of the upper locking disc 300, and at the same time, the lower locking disc 400 drives the cam 620 to rotate reversely, so that the cam 620 finally returns to the position shown. Figure 2

[0068] Exemplarily, in this embodiment, the cooperation groove 411 can be arranged to protrude from the lower locking disc 400 and be located below the lower locking disc 400. The tube column housing 100 can further be provided with an avoiding groove 130. When the lower locking disc 400 moves downward, at least part of the cooperation groove 411 can enter the avoiding groove 130, thereby avoiding the interference between the lower locking disc 400 and the tube column housing 100.

[0069] According to the above technical means, in this embodiment, the cooperation groove 411 is arranged at the end of the installation cavity 410 away from the upper locking disc 300, the cam 620 abuts against the cooperation groove 411, and when the driving mechanism 600 is in the powered-off state, the base circle of the cam 620 abuts against the cooperation groove 411. Therefore, it can be ensured that when the driving mechanism 600 is in the powered-off state, the lower locking disc 400 is located at the highest position, so as to be locked and fixed with the upper locking disc 300. When the driving mechanism 600 is in the powered-on state, the motor 610 drives the cam 620 to rotate, the radius of the surface of the cam 620 abutting against the cooperation groove 411 gradually increases, thereby driving the lower locking disc 400 and the return spring 500 to move away from the upper locking disc 300 as a whole, so that the lower locking disc 400 is unlocked from the upper locking disc 300, thereby ensuring the normal use of the steer-by-wire system.

[0070] Please continue to refer to Figure 2 ​The cam 620 of the embodiment further comprises a limiting boss 621 and an assembly hole 622. The motor output shaft 611 can pass through the assembly hole 622, so as to realize the connection between the motor 610 and the cam 620. The limiting boss 621 can be located at one end of the cam 620 away from the base circle. The abutting protrusion 412 is arranged in the matching groove 411. The abutting protrusion 412 and the limiting boss 621 can be located at the same side of the cam 620 along the second direction Y. When the driving mechanism 600 is in the power-on state, the motor 610 drives the cam 620 to rotate, so that the limiting boss 621 abuts against the abutting protrusion 412. When the limiting boss 621 abuts against the abutting protrusion 412, the rotation of the cam 620 is prevented, so that the cam 620 is kept at the current position, and the lower locking disc 400 cannot continue to move downward. That is, the cooperation between the limiting boss 621 and the abutting protrusion 412 can limit the maximum stroke of the downward movement of the lower locking disc 400.

[0071] According to the above technical means, the abutment of the limiting boss 621 and the abutting protrusion 412 can be used to limit the further rotation of the cam 620, so as to limit the stroke of the downward movement of the lower locking disc 400.

[0072] Please continue to refer to Figure 1 The lower locking disc 400 of the embodiment comprises a plurality of fixing grooves 420. The plurality of fixing grooves 420 are arranged at intervals along the circumference of the lower locking disc 400. For example, the plurality of fixing grooves 420 can be arranged at equal intervals along the circumference of the lower locking disc 400. A plurality of return springs 500 are arranged. The plurality of return springs 500 correspond to the plurality of fixing grooves 420 one by one, and each return spring 500 is arranged in the fixing groove 420 matched therewith.

[0073] According to the above technical means, the plurality of return springs 500 are arranged at intervals along the circumference of the lower locking disc 400, so as to ensure the uniformity of the force borne by each part of the lower locking disc 400, avoid the inclination of the lower locking disc 400 during the movement of the lower locking disc 400 toward the upper locking disc 300 under the elastic force of the return spring 500, and thus ensure the stability of the locking between the lower locking disc 400 and the upper locking disc 300.

[0074] Further, the fixing groove 420 of the embodiment comprises a first guide column 421, and the pipe column shell 100 comprises a second guide column 110. The first end of the return spring 500 is sleeved on the first guide column 421, and the second end of the return spring 500 is sleeved on the second guide column 110.

[0075] According to the above technical means, since the two ends of the return spring 500 are sleeved on the first guide column 421 and the second guide column 110 respectively, the deformation direction of the return spring 500 can be guided by the first guide column 421 and the second guide column 110, so as to avoid the falling of the return spring 500 from the fixing groove 420.

[0076] Please continue to refer to Figure 1 , Figure 3 and Figure 4 The upper locking portion of the upper locking disc 300 is arranged at one end of the upper locking disc 300 facing the lower locking disc 400. The lower locking portion of the lower locking disc 400 is arranged at one end of the lower locking disc 400 facing the upper locking disc 300.

[0077] When the driving mechanism 600 is in the powered-off state, the upper locking portion cooperates with the lower locking portion to lock and fix the lower locking disc 400 and the upper locking disc 300. For example, when the driving mechanism 600 is in the powered-off state, the upper locking portion and the lower locking portion can be connected and fixed by abutting, inserting and / or locking, so as to lock and fix the lower locking disc 400 and the upper locking disc 300.

[0078] According to the above technical means, the upper locking portion is arranged at one end of the upper locking disc 300 facing the lower locking disc 400, and the lower locking portion is arranged at one end of the lower locking disc 400 facing the upper locking disc 300. Therefore, the lower locking disc 400 and the upper locking disc 300 can be locked and fixed by the connection and cooperation of the upper locking portion and the lower locking portion.

[0079] Specifically, the upper locking portion includes a plurality of upper locking protrusions 310, which are arranged at intervals along the circumference of the upper locking disc 300, and an upper locking groove is formed between any two adjacent upper locking protrusions 310. The lower locking portion includes a plurality of lower locking protrusions 430, which are arranged at intervals along the circumference of the lower locking disc 400, and a lower locking groove is formed between any two adjacent lower locking protrusions 430. In the third direction Z, the upper locking protrusions 310 correspond to and are matched with the lower locking grooves one by one, and the lower locking protrusions 430 correspond to and are matched with the upper locking grooves one by one.

[0080] When the driving mechanism 600 is in the powered-off state, under the elastic force of the return spring 500, the lower locking protrusions 430 are inserted between any two adjacent upper locking protrusions 310, the upper locking protrusions 310 are inserted between any two adjacent lower locking protrusions 430, and the lower locking protrusions 430 and the upper locking protrusions 310 abut each other in the circumferential direction of the pipe column housing 100, so as to lock and fix the lower locking disc 400 and the upper locking disc 300.

[0081] According to the above technical means, when the return spring 500 drives the lower locking disc 400 to abut against the upper locking disc 300, the lower locking protrusions 430 on the lower locking disc 400 can be inserted between the two upper locking protrusions 310 on the corresponding upper locking disc 300, so as to lock and fix the lower locking disc 400 and the upper locking disc 300.

[0082] Please continue to refer to Figure 1 and Figure 4The inner wall of the column housing 100 of the embodiment is provided with a guide groove 120, and the outer periphery of the lower locking disc 400 is provided with a guide rib 440, which is located in the guide groove 120.

[0083] Exemplarily, the guide groove 120 can be arranged along the third direction Z, and two guide grooves 120 can be arranged on the inner wall of the column housing 100 opposite to each other along the first direction X. Two guide ribs 440 can also be arranged on the lower locking disc 400, respectively on the two sides of the lower locking disc 400 along the first direction X. The two guide ribs 440 are respectively located in the two guide grooves 120 and can slide along the guide grooves 120.

[0084] According to the above technical means, the guide rib 440 on the outer periphery of the lower locking disc 400 cooperates with the guide groove 120 on the inner wall of the column housing 100, so that the lower locking disc 400 can be guided to move up and down along the axial direction of the column housing 100, and the inclination of the lower locking disc 400 during movement can be avoided.

[0085] The embodiment also provides a steer-by-wire steering system, which comprises the steering column locking assembly.

[0086] Specifically, the steer-by-wire steering system can comprise the steering column locking assembly and a steering wheel, the steering wheel is connected to one end of the column shaft outside the column housing, and the motor of the driving mechanism can be in communication connection with a vehicle controller, and the vehicle controller is used to acquire, etc.

[0087] Figure 5 A control method flow chart of the steer-by-wire steering system is shown. As shown in the figure, Figure 5 The control method of the steer-by-wire steering system of the embodiment comprises:

[0088] In step S110, the state signal of the vehicle and the state signal of the main driver seat are acquired.

[0089] Exemplarily, the state signal of the vehicle can include an ignition state (i.e. the vehicle is in On gear) and an off state (i.e. the vehicle is in Off gear). The state signal of the main driver seat can include a driver and no driver, and the state signal of the driver seat can be acquired by a gravity sensor of the main driver seat.

[0090] In step S120, a corresponding control instruction is sent to the motor based on the state signal of the vehicle and the state signal of the main driver seat, so that the motor enters a power-off state or a power-on state.

[0091] Exemplarily, when the vehicle is in the off state, the vehicle controller sends a power-off instruction to the motor, so that the motor is in the power-off state. At this time, the elastic force of the return spring locks and fixes the lower locking disc and the upper locking disc, and the steering wheel cannot be turned.

[0092] When the vehicle is in an ignition state, the vehicle controller further acquires a state signal of the main driving position.

[0093] If the main driving position is not occupied by a driver, the vehicle controller sends a power-off instruction to the motor, so that the motor is in a power-off state. At this time, the elastic force of the return spring locks the lower locking disc and the upper locking disc, and the steering wheel cannot be turned.

[0094] If the main driving position is occupied by a driver, the vehicle controller sends a power-on instruction to the motor, so that the motor is in a power-on state. At this time, the motor drives the driving member to move, the driving member drives the lower locking disc to move away from the upper locking disc, the lower locking disc and the upper locking disc are unlocked, and the steering wheel can be turned.

[0095] The steer-by-wire system of the embodiment can prevent the lower locking disc and the upper locking disc from having an angle difference due to the rotation of the steering wheel in the power-off state.

[0096] The embodiment further provides a vehicle comprising the steer-by-wire system.

[0097] The vehicle of the embodiment can prevent the lower locking disc and the upper locking disc from having an angle difference due to the rotation of the steering wheel in the power-off state.

[0098] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent replacement or transformation of the present application made by those skilled in the art based on the present application is within the protection scope of the present application.

Claims

1. A steering column locking assembly, characterized in that, The utility model relates to a locking mechanism of a pipe column, which comprises: a pipe column shell (100); a pipe column shaft (200) arranged in the pipe column shell (100); an upper locking disc (300) arranged at one end of the pipe column shaft (200) in the pipe column shell (100); a lower locking disc (400) arranged in the pipe column shell (100) and opposite to the upper locking disc (300), the lower locking disc (400) being movable along the axial direction of the pipe column shell (100); at least one return spring (500) arranged between the pipe column shell (100) and the lower locking disc (400); a driving mechanism (600) arranged in the pipe column shell (100) and connected with the lower locking disc (400); when the driving mechanism (600) is in a power-off state, the return spring (500) drives the lower locking disc (400) to abut against the upper locking disc (300) so as to lock and fix the lower locking disc (400) and the upper locking disc (300); when the driving mechanism (600) is in a power-on state, the driving mechanism (600) drives the lower locking disc (400) to separate from the upper locking disc (300) so as to unlock the lower locking disc (400) and the upper locking disc (300).

2. The steering column lock assembly of claim 1, wherein The lower locking disc (400) is further provided with a mounting cavity (410), one end of the mounting cavity (410) away from the upper locking disc (300) is provided with a matching groove (411); the driving mechanism (600) comprises a motor (610) and a cam (620), the motor (610) is connected with the pipe column shell (100), the output end of the motor (610) is connected with the cam (620), the cam (620) is located in the mounting cavity (410), and the cam (620) abuts against the matching groove (411); when the driving mechanism (600) is in a power-off state, the base circle of the cam (620) abuts against the matching groove (411).

3. A column lock assembly according to claim 2, wherein The cam (620) is further provided with a limiting boss (621), the matching groove (411) is provided with an abutting protrusion (412), when the driving mechanism (600) is in a power-on state, the motor (610) drives the cam (620) to rotate, so that the limiting boss (621) abuts against the abutting protrusion (412).

4. The steering column lock assembly of claim 1, wherein The lower locking disc (400) is provided with a plurality of fixing grooves (420), the plurality of fixing grooves (420) are arranged at intervals along the circumferential direction of the lower locking disc (400), the return spring (500) is provided in plurality, and the plurality of return springs (500) correspond to the plurality of fixing grooves (420) one by one.

5. A column lock assembly according to claim 4, wherein The fixed groove (420) is internally provided with a first guide column (421), the pipe column shell (100) is internally provided with a second guide column (110), a first end of the return spring (500) is sleeved on the first guide column (421), and a second end of the return spring (500) is sleeved on the second guide column (110).

6. The steering column lock assembly of claim 1, wherein The upper locking disc (300) is provided with an upper locking portion at one end thereof facing the lower locking disc (400); and the lower locking disc (400) is provided with a lower locking portion at one end thereof facing the upper locking disc (300). When the driving mechanism (600) is in a power-off state, the upper locking portion cooperates with the lower locking portion to lock and fix the lower locking disc (400) and the upper locking disc (300).

7. A column lock assembly according to claim 6, wherein The upper locking portion comprises a plurality of upper locking protrusions (310) which are arranged at intervals along the circumference of the upper locking disc (300); and the lower locking portion comprises a plurality of lower locking protrusions (430) which are arranged at intervals along the circumference of the lower locking disc (400). When the driving mechanism (600) is in a power-off state, the lower locking protrusions (430) are inserted between two adjacent upper locking protrusions (310) to lock and fix the lower locking disc (400) and the upper locking disc (300).

8. The steering column lock assembly of claim 1, wherein, The inner wall of the pipe column shell (100) is provided with a guide groove (120), and the outer circumferential side of the lower locking disc (400) is provided with a guide rib (440) which is located in the guide groove (120).

9. A steer-by-wire system characterized by, The steering column locking assembly comprises the steering column locking assembly according to any one of claims 1-8.

10. A vehicle characterized by comprising: The steer-by-wire system comprises the steer-by-wire system according to claim 9.

Images