CN112706829A - Steering system and automobile - Google Patents

Abstract

The invention relates to the field of automobiles, and discloses a steering system and an automobile. The steering system comprises a first rotating shaft (31) which can be connected with a steering wheel (100) to synchronously rotate along with the steering wheel (100), a second rotating shaft (32) which can be in transmission connection with wheels, and a decoupling device (200) for decoupling or coupling the first rotating shaft (31) and the second rotating shaft (32). The steering system provided by the invention can prevent the front tires of the automobile from rotating along with the steering wheel (100) when the automobile enters a game mode, thereby facilitating the realization of an automobile game scene scheme.

Description

Steering system and automobile

Technical Field

The invention relates to the field of automobiles, in particular to a steering system, and further relates to an automobile.

Background

With the progress of science and technology, the demand of people for the entertainment function of the automobile game is continuously increased. The galloping games such as the best quality galloping and the QQ galloping can enable people to experience mad driving pleasure, and are widely pursued and loved by automobile enthusiasts. The game function is generally realized by operating a conventional keyboard or a professional game steering wheel on a PC terminal. The conventional keyboard can not truly simulate the hand feeling of steering of a driving control steering wheel, the equipment volume of the professional game steering wheel is large, the cost performance of the user for self-purchase and use is low, if the user operates the professional game steering wheel in a related entertainment place, the site limitation can be brought, and the use requirement of the user can not be met anytime and anywhere.

In view of the above, there is a need to develop a new car with both game function and normal driving function.

The inventor finds that the existing automobile is modified in the process of practicing the application, so that when the real driving scene is simulated in a vehicle-mounted game, the real steering of the game is realized by means of the existing steering wheel when the automobile enters a game mode.

The steering wheel of present car passes through nut and internal spline nestification and pivot fixed connection, because the steering wheel is connected with a steering system, during the recreation mode, the steering wheel rotates, and the tire also can follow and turn to before the vehicle, and the friction feedback of road surface and tire is to the steering wheel end for steering wheel turning moment is big, has also increased the wearing and tearing of tire simultaneously, is unfavorable for the realization of recreation scene scheme.

Disclosure of Invention

One of the objectives of the present invention is to overcome the above problems in the prior art, and to provide a steering system, which can prevent the front tires of the vehicle from rotating with the steering wheel when the vehicle enters the game mode, thereby facilitating the implementation of the game scenario scheme of the vehicle.

In order to achieve the above object, a first aspect of the present invention provides a steering system including a first rotating shaft connectable to a steering wheel so as to be rotated in synchronization with the steering wheel, a second rotating shaft drivingly connectable to wheels, and a decoupling device for decoupling or coupling the first rotating shaft and the second rotating shaft.

Preferably, the second rotating shaft is arranged at an end of the first rotating shaft far away from the steering wheel and is coaxial with the first rotating shaft, and the decoupling device comprises: the sliding block is arranged on the outer side of the first rotating shaft and the second rotating shaft, and the driving piece is used for driving the sliding block to translate along the axial direction of the first rotating shaft and the second rotating shaft so as to decouple or couple the first rotating shaft and the second rotating shaft.

Preferably, the sliding block is a sleeve sleeved outside the first rotating shaft or the second rotating shaft.

Preferably, a first internal spline capable of spline-connecting with the first rotating shaft and a second internal spline capable of spline-connecting with the second rotating shaft are formed on an inner peripheral surface of the sleeve.

Preferably, a bearing is coaxially fixed outside the sleeve, and an outer ring of the bearing is connected with the driving member to drive the sleeve to axially translate under the driving of the driving member.

Preferably, the driving member includes a motor, a screw rod coaxially fixed with an output shaft of the motor, and a driving block threadedly connected with the screw rod, and the driving block is fixed with an outer ring of the bearing.

Preferably, the decoupling device further comprises a framework with a cavity formed inside, the sliding block is accommodated in the cavity, and the driving element is located outside the cavity; the first rotating shaft and the second rotating shaft respectively extend into the cavity of the framework from two axial ends of the framework; the second rotating shaft is fixed with the framework, and the first rotating shaft is rotatably connected with the framework through a rotating bearing.

Preferably, a coupling limiting surface which can abut against an end surface of one axial end of the slider at a coupling position to limit displacement of one axial side of the slider and a decoupling limiting surface which can abut against a limiting step formed on an outer side wall of the slider at a decoupling position to limit displacement of the other axial side of the slider are formed in the cavity.

Preferably, the steering wheel includes the steering wheel main part and sets up the orientation of steering wheel main part the cavity spliced pole of one side of first pivot, first pivot can stretch into to in the cavity spliced pole and with cavity spliced pole splined connection, keeping away from of first pivot the one end of second pivot be used for threaded connection with the terminal surface looks butt of spliced pole is in order to restrict the stop nut of the axial translation of first pivot.

A second aspect of the present invention provides an automobile including the steering system according to the first aspect of the present invention, based on the steering system provided in the first aspect of the present invention.

The technical scheme provided by the invention has the following beneficial effects:

the steering system comprises a first rotating shaft, a second rotating shaft and a decoupling device for decoupling the first rotating shaft and the second rotating shaft; in specific implementation, the first rotating shaft is connected with the steering wheel to synchronously rotate along with the steering wheel, and the second rotating shaft is in transmission connection with the wheels; when the first rotating shaft and the second rotating shaft are coupled, the automobile enters a normal driving mode, the steering wheel rotates to drive the first rotating shaft and the second rotating shaft to synchronously rotate and transmit to the wheels, and therefore the wheels are driven to steer.

When the first rotating shaft and the second rotating shaft are decoupled, the automobile enters a game mode, the steering wheel drives the first rotating shaft to synchronously rotate when rotating, but the second rotating shaft is decoupled from the first rotating shaft, so that the second rotating shaft cannot be driven to rotate by the first rotating shaft, and therefore the rotating torque of the automobile steering wheel cannot be transmitted to the wheels to drive the wheels to steer. Therefore, when the automobile enters a game mode, the steering wheel rotates, but the automobile wheels cannot follow the rotation, the friction between the road surface and the wheels cannot be fed back to the steering wheel end to cause large steering wheel rotation moment, the abrasion of tires is reduced, and the realization of an automobile game scene scheme is facilitated.

In addition, the invention decouples or couples the first rotating shaft and the second rotating shaft through the decoupling device, thereby realizing the extension of the game function of the prior automobile. Because the first rotating shaft and the steering wheel still rotate synchronously, the steering wheel and the first rotating shaft can be connected by adopting the existing connection mode of the steering system and the steering wheel, so that the existing steering wheel is not required to be structurally modified, only the rotating shaft in the steering system is required to be modified, and the realization of an automobile game scene scheme is facilitated.

Drawings

Fig. 1 is a schematic structural diagram of a conventional steering system, in which 1A is a schematic connection diagram of a rotating shaft and a steering wheel, and fig. 1B is an enlarged view of a portion a in fig. 1A;

fig. 2 is a schematic structural diagram of a steering system according to an embodiment of the present invention, where 2A is a schematic connection diagram of the steering system and a steering wheel, and fig. 2B is an enlarged view of a portion B in fig. 2A;

fig. 3 is a schematic structural view of a rotating shaft of a conventional steering system;

fig. 4 is a schematic structural view of a rotating shaft of a steering system according to an embodiment of the present invention;

FIG. 5 is a top view of a bushing provided in accordance with an embodiment of the present invention;

FIG. 6 is a cross-sectional view A-A of the cannula shown in FIG. 5;

FIG. 7 is a schematic diagram of the self-compensating clearance when the sleeve is assembled with the first shaft in accordance with an embodiment of the present invention; wherein, (a) is a schematic view of the assembly of the sleeve and the first rotating shaft in an ideal state, and (b) is a schematic view of the sleeve and the first rotating shaft when a rotating and matching gap exists; (c) the assembly schematic diagram is the assembly schematic diagram after the gap between the sleeve and the first rotating shaft is compensated;

fig. 8 is a block diagram of an automobile according to an embodiment of the present invention.

Description of the reference numerals

1-a limit nut; 2-nesting the internal splines; 3-a rotating shaft; 31-a first shaft; 31 a-the end of the first shaft; 31 b-external splines; 31c — a first external spline; 32-a second shaft; 32 a-second male spline; 3 a-the end of the spindle; 3 b-external splines; 4-a steering cylinder; 100-a steering wheel; 200-a decoupling means; 201-a slide block; 202-a drive block; 203-a bearing; 204-a bearing mounting ring; 205-a backbone; 206-a motor; 207-lead screw.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right with reference to the accompanying drawings, unless otherwise specified. "inner and outer" refer to the inner and outer contours of the component itself.

Referring to fig. 1, the conventional steering wheel of an automobile is fixedly connected with an inner spline nest 2 and a rotating shaft 3 through a nut 1, and since the steering wheel is connected with a steering system, a steering wheel 100 rotates during a game mode, and a front tire of the automobile can also turn.

Referring to fig. 2, a first aspect of the embodiment of the present invention provides a steering system, which includes a first rotating shaft 31 capable of being connected to a steering wheel 100 to rotate synchronously with the steering wheel 100, a second rotating shaft 32 capable of being in transmission connection with wheels, and a decoupling device 200 for decoupling or coupling the first rotating shaft 31 and the second rotating shaft 32.

Specifically, the first rotating shaft 31 is connected with the steering wheel 100 to be capable of rotating synchronously with the steering wheel 100, and the second rotating shaft 32 is in transmission connection with wheels; when the first rotating shaft 31 and the second rotating shaft 32 are coupled, the vehicle enters a normal driving mode, and the steering wheel 100 rotates to drive the first rotating shaft 31 and the second rotating shaft 32 to synchronously rotate and transmit the rotation to the wheels, so that the wheels are driven to steer.

When the first rotating shaft 31 and the second rotating shaft 32 are decoupled, the automobile enters a game mode, the steering wheel 100 drives the first rotating shaft 31 to rotate synchronously when rotating, but the second rotating shaft 32 is decoupled from the first rotating shaft 31, so that the second rotating shaft is not driven to rotate by the first rotating shaft 31, and therefore, the rotating torque of the automobile steering wheel 100 is not transmitted to the wheels to drive the wheels to steer. Therefore, when the automobile enters the game mode, the steering wheel 100 rotates, but the automobile wheels cannot rotate along with the steering wheel, the friction between the road surface and the wheels cannot be fed back to the end of the steering wheel 100, so that the rotating moment of the steering wheel 100 is large, the abrasion of tires is reduced, and the realization of the automobile game scene scheme is facilitated.

In addition, the decoupling device 200 is used for decoupling or coupling the first rotating shaft 31 and the second rotating shaft 32, so that the extension of the game function of the existing automobile is realized. Since the first rotating shaft 31 and the steering wheel 100 are still rotated in synchronization, the first rotating shaft 31 and the steering wheel 100 may be connected by the connection of the steering system and the steering wheel 100 as shown in fig. 1. In other words, the structure of the existing steering wheel 100 and the structure of the connecting end of the steering system and the steering wheel 100 are not required to be modified, and only the rotating shaft of the existing steering system is required to be modified, so that the realization of the automobile game scene scheme is facilitated.

Further, in a preferred embodiment, the rotating shaft of the steering system is modified as shown in fig. 3 and 4, and fig. 3 shows a rotating shaft structure in the existing steering system, which cannot achieve the decoupling of the wheels and the steering wheel 100. The embodiment of the invention improves the rotating shaft structure in fig. 3, as shown in fig. 4, the existing rotating shaft structure is modified into two parts separated from each other: a first rotating shaft 31 and a second rotating shaft 32 which is arranged at one end of the first rotating shaft 31 far away from the steering wheel 100 and is coaxial with the first rotating shaft 31, and a decoupling device 200 is used for connecting the first rotating shaft 31 and the second rotating shaft 32. When the decoupling device 200 couples the first rotating shaft 31 and the second rotating shaft 32, there is no relative circumferential movement between the two, in other words, the first rotating shaft 31 and the second rotating shaft 32 will rotate synchronously, the wheels are coupled with the steering wheel 100, and the vehicle enters the normal driving mode. When the decoupling device 200 decouples the first rotating shaft 31 and the second rotating shaft 32, the first rotating shaft 31 cannot drive the second rotating shaft 32 to rotate, the wheels and the steering wheel 100 are decoupled, and the automobile enters a game mode.

Further, the specific structure of the decoupling assembly 200 that can achieve the above-described decoupling function may be varied. One of the embodiments of the decoupling assembly 200 is given below, although the structure of the decoupling assembly 200 is not limited thereto.

In this embodiment, the decoupling device 200 comprises: a slide block 201 disposed outside the first rotating shaft 31 and the second rotating shaft 32, and a driving member for driving the slide block 201 to translate along the axial direction of the first rotating shaft 31 and the second rotating shaft 32 so as to decouple or couple the first rotating shaft 31 and the second rotating shaft 32.

Specifically, when the driver driving slider 201 is axially moved to connect the first rotating shaft 31 and the second rotating shaft 32 at the same time, the first rotating shaft 31 and the second rotating shaft 32 are coupled, and when the driver driving slider 201 is axially moved to connect only one of the first rotating shaft 31 and the second rotating shaft 32, the first rotating shaft 31 and the second rotating shaft 32 are decoupled.

The specific structure of the slider 201 can be various. For example, grooves are formed on the outer peripheral surfaces of the first and second rotating shafts 31 and 32 in a direction parallel to the axis, the grooves on the first rotating shaft 31 and the second rotating shaft 32 are coincident in the length direction, the slider 201 is a slide bar embedded in the grooves and capable of translating in the length direction of the grooves, when the slide bar translates to be embedded in the grooves of the first and second rotating shafts 31 and 32 at the same time, the first and second rotating shafts 31 and 32 are coupled, and when the slide bar translates to be embedded in only one of the grooves of the first and second rotating shafts 31 and 32, the first and second rotating shafts 31 and 32 are decoupled.

For another example, the sliding block 201 may be a sleeve that is sleeved on the first rotating shaft 31 or the second rotating shaft 32, and a protrusion may be formed on one of an inner circumferential surface of the sleeve and an outer circumferential surface of the rotating shaft, and a groove may be formed on the other of the inner circumferential surface and the outer circumferential surface of the sleeve, and the protrusion is accommodated in the groove. Wherein the rotating shafts include a first rotating shaft 31 and a second rotating shaft 32. When the sliding sleeve moves axially to connect the first rotating shaft 31 and the second rotating shaft 32 at the same time, the first rotating shaft 31 and the second rotating shaft 32 are coupled; when the sliding sleeve is moved axially to be connected with only one of the first rotating shaft 31 and the second rotating shaft 32, the first rotating shaft 31 and the second rotating shaft 32 are decoupled.

In a preferred embodiment, the inner circumferential surface of the sleeve is formed with a first internal spline capable of being spline-connected to the first rotating shaft 31 and a second internal spline capable of being spline-connected to the second rotating shaft 32.

Specifically, as shown in fig. 4, a first external spline 31c is formed on the outer peripheral surface of the end portion of the first rotating shaft 31 close to the second rotating shaft 32, and a second external spline 32a is formed on the outer peripheral surface of the end portion of the second rotating shaft 32 close to the first rotating shaft 31; a first inner spline capable of spline-fitting with the first outer spline 31c and a second inner spline capable of spline-fitting with the second outer spline 32a are formed on the inner peripheral surface of the sleeve.

In the embodiment shown in fig. 2 and 4, the axial length of the second external splines 32a is greater than the axial length of the first external splines 31 c. The sleeve is normally splined to the second shaft 32.

Referring to fig. 2, the first and second rotating shafts 31 and 32 are coupled when the sleeve is moved up to be splined to the first rotating shaft 31, and the first and second rotating shafts 31 and 32 are decoupled when the sleeve is moved down to be disengaged from the first rotating shaft 31.

The first internal splines and/or the second internal splines on the sleeve may be rectangular splines. Rectangular spline needs guarantee the fitting relation between spline and keyway through precision finishing, in order to make the spline can hold in the keyway, there is little gap between spline and the keyway combination back, when rectangular spline has machining error, the clearance between spline and the keyway fitting surface can further increase, after first pivot 31 and second pivot coupling, the free stroke grow that this kind of fitting gap will make the steering wheel can not satisfy the designing requirement even.

In order to solve this technical problem, in a preferred embodiment of the present invention, the first internal splines and/or the second internal splines of the sleeve are trapezoidal splines arranged along an axial direction parallel to the sleeve.

Referring to fig. 5-6, in the embodiment shown in fig. 5-6, the internal splines of the sleeve are trapezoidal.

Referring to fig. 7 (a), in an ideal state, when the first rotating shaft 31 and the second rotating shaft 32 are coupled, the inclined surface of the trapezoidal internal spline of the sleeve and the inclined surface of the trapezoidal external spline of the first rotating shaft 31 are in close contact and attached to each other, for example, by using the common coupling of the sleeve and the second rotating shaft spline.

Referring to the graph (b) of fig. 7, as the use time is prolonged, the trapezoidal inner spline and the trapezoidal outer spline may be worn, deformed, and the like, thereby causing a gap between the trapezoidal inner spline of the sleeve and the trapezoidal outer spline of the first rotating shaft 31 at the same coupling position.

Referring to graph (c) of FIG. 7, to eliminate the gap, the sleeve may be driven to continue moving upward; because the inner spline of the sleeve and the outer spline of the first rotating shaft 31 are both trapezoidal splines, the upward moving sleeve can eliminate the gap between the inner spline of the sleeve and the outer spline of the first rotating shaft 31, thereby solving the gap problem in the spline combination assembly in the decoupling device 200.

In addition, compared with the rectangular spline, the combined contact area of the trapezoidal spline is increased, and the abrasion is favorably reduced; and the precision machining requirement and the assembly requirement of the assembly surface of the trapezoidal spline or the key slot are lower than those of the rectangular spline, so that the cost is saved.

In some embodiments, the sleeve may be splined to the first shaft 31. At this time, the second internal spline may be a trapezoidal internal spline, and a trapezoidal external spline that is gradient-fitted to the trapezoidal internal spline may be formed on the second rotating shaft 32.

Preferably, the radial dimension of the axial section of the first rotating shaft 31 having the first external spline 31c and the radial dimension of the axial section of the second rotating shaft 32 having the second external spline 32a are the same, so that the first internal spline and the second internal spline can be machined on the inner circumferential surface of the sleeve at one time, thereby simplifying the machining process of the sleeve.

As described above, the slider 201 is driven by the driving member to move up and down. In a preferred embodiment, in order to avoid that the first rotating shaft 31 and the second rotating shaft 32 drive the driving member to rotate when rotating, the sleeve is interference-mounted in the bearing 203, the outer ring of the bearing 203 is fixedly connected with the driving member, and the sleeve is driven to axially translate by the driving member so as to realize the coupling or decoupling between the first rotating shaft 31 and the second rotating shaft 32. The driving member is mounted on a stationary component, and when the first rotating shaft 31 and/or the second rotating shaft 32 rotates, only the inner ring of the bearing 203 is driven to rotate, and the outer ring of the bearing 203 is connected with the driving member and keeps a stationary state. Therefore, the influence of the rotation of the rotating shaft on the driving piece can be avoided. It should be noted that when the steering wheel 100 and the wheels are in the decoupled state, the wheels may be deflected by other external forces, so as to cause the second rotating shaft 32 to rotate. Therefore, there is a case where the second rotating shaft 32 alone rotates as described above.

Further, the driving member includes a motor 206, a lead screw 207 coaxially fixed to an output shaft of the motor 206, and a driving block 202 threadedly connected to the lead screw 207, and the driving block 202 is fixed to an outer ring of the bearing 203. When the motor 206 is powered on to rotate, the lead screw 207 fixed on the output shaft of the motor 206 is driven to rotate synchronously, and the lead screw 207 is in threaded connection with the driving block 202, so that the driving block 202 is driven to translate along the axial direction of the lead screw 207 when the lead screw 207 rotates. The axial direction of the lead screw 207 is parallel to the axial direction of the first rotating shaft 31 and the second rotating shaft 32, and since the driving block 202 is fixed with the outer ring of the bearing 203, the driving block 202 translates axially and simultaneously drives the bearing 203 to translate up and down, thereby driving the sleeve to translate up and down.

More specifically, the outer ring of the bearing 203 is interference-mounted in a bearing mounting ring 204, a lug protruding radially outward is formed on the outer peripheral surface of the bearing mounting ring 204, a first through hole is formed on the lug, a connecting portion connected and fixed to the lug is formed on the driving block 202, a second through hole is formed on the connecting portion, and the bearing mounting ring 204 and the driving block 202 are fixedly connected by a connecting member, such as a bolt, penetrating through the first through hole and the second through hole.

Referring to fig. 2, in a preferred embodiment, in order to ensure the coaxiality of the first rotating shaft 31 and the second rotating shaft 32, the decoupling device 200 can reliably decouple or couple the first rotating shaft 31 and the second rotating shaft 32. The decoupling device 200 provided by the embodiment of the present invention further includes a skeleton 205 having a cavity formed therein, the slider 201 is accommodated in the cavity, and the driving element is located outside the cavity; the first rotating shaft 31 and the second rotating shaft 32 respectively extend into the cavity of the framework 205 from two axial ends of the framework 205; the second rotating shaft 32 is fixed to the frame 205, and the first rotating shaft 31 is rotatably connected to the frame 205 through a rotating bearing.

Specifically, referring to fig. 2, the lower portion of the second rotating shaft is fixed in the steering tube 4, the frame 205 may be, for example, a cylinder, and a cavity is formed inside the frame 205, the lower end of the frame 205 is fixed on the steering tube 4, the first rotating shaft 31 extends into the cavity from the upper end of the frame 205, and an axially inwardly recessed bearing installation chamber is formed on an end plate of the upper end of the frame 205, and a bearing is interference-fitted in the bearing installation chamber. The first rotary shaft 31 passes through the bearing and is fitted with an inner race of the bearing, for example, with an interference fit. The second shaft 32 extends into the cavity from the lower end of the frame 205, and the outer side wall thereof is fixedly connected with the frame 205.

Further, an opening is formed on the outer side wall of the framework 205, so that the driving block 202 of the driving element located outside the framework 205 can extend into the cavity of the framework 205 from the opening and be fixed with the bearing mounting ring 204 in the cavity.

In a preferred embodiment, in order to limit the axial displacement of the slider 201, a coupling limit surface capable of abutting against an end surface of one axial end of the slider 201 at a coupling position to limit the displacement amount of one axial side of the slider 201 and a decoupling limit surface capable of abutting against a limit step formed on an outer side wall of the slider 201 at a decoupling position to limit the displacement amount of the other axial side of the slider 201 are formed in the cavity.

Specifically, referring to fig. 2, the cavity is a cylindrical cavity, the lower surface of the bearing installation chamber can be used as the coupling limiting surface, when the slider 201 moves upward until the upper end surface of the slider contacts with the lower surface of the bearing installation chamber, the first rotating shaft 31 and the second rotating shaft 32 are coupled, and the slider 201 cannot move upward continuously.

The inner peripheral surface of the lower portion of the bobbin 205 is radially spaced from the second rotating shaft 32 to form an annular space, and the annular space communicates with the cylindrical cavity and is held coaxially. The radial dimension of the lower part of the sliding block 201 is slightly smaller than that of the upper part thereof; as such, a step protruding radially outward is formed on the outer circumferential surface of the slider 201. The lower part of the slider 201 can be accommodated in an annular retaining space, and the radial dimension of the annular retaining space is smaller than the radial dimension of the upper part of the slider 201. In this way, when the slider 201 moves downward to the limit, the radial step of the slider 201 abuts against the decoupling limit surface (i.e. the bottom surface of the cavity) at the upper end of the annular limit space, thereby limiting the limit position of the slider 201 moving downward in the axial direction, at which the slider 201 is disengaged from the first rotating shaft 31 and the second rotating shaft 32 are decoupled.

As described above, the steering system provided by the embodiment of the present invention can be connected to the steering wheel 100 by using the existing connection method.

As shown in fig. 3, the rotating shaft 3 of the conventional steering system includes an end portion 3a extending into the steering wheel, the end portion 3a is used for being screwed with the limit nut 1, an external spline 3b is formed on an outer circumferential surface of a portion adjacent to the end portion, and the rotating shaft 3 is splined to the hollow connecting column on the steering wheel through the external spline 3 b.

As shown in fig. 1 and 4, in the embodiment of the present invention, the steering wheel 100 includes a steering wheel main body and a hollow connecting column disposed on a side of the steering wheel main body facing the first rotating shaft 31, the first rotating shaft 31 is in spline connection with the connecting column, and one end of the first rotating shaft 31 far away from the second rotating shaft 32 is in threaded connection with a limit nut 1 abutting against an end surface of the connecting column to limit axial translation of the first rotating shaft 31.

Specifically, the inner circumferential surface of the hollow connecting column is formed with an internal spline, as shown in fig. 1 and 2, the internal spline is generally provided by an internal spline nest 2 independent from the outer shell of the hollow connecting column, the outer circumferential surface of the first rotating shaft 31 is formed with an external spline 31b matched with the internal spline, and the first rotating shaft 31 is in splined connection with the hollow connecting column to prevent the steering wheel 100 from moving circumferentially relative to the first rotating shaft 31; in addition, the outer peripheral surface of the end portion 31a of the first rotating shaft 31 extending into the steering wheel 100 is provided with an external thread, the limiting nut 1 with a flange formed at the bottom is in threaded connection with one end 3a of the first rotating shaft 31 extending into the steering wheel 100, the flange at the bottom is abutted against the upper end face of the hollow connecting column, and the limiting nut 1 is used for avoiding the axial displacement of the steering wheel 100 relative to the first rotating shaft 31, so that the first rotating shaft 31 can be ensured to rotate synchronously along with the steering wheel 100.

Referring to fig. 8, a second aspect of the embodiment of the present invention provides an automobile including the steering system according to the first aspect of the embodiment of the present invention, based on the steering system provided in the first aspect of the embodiment of the present invention.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. Including each of the specific features, are combined in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (10)

1. A steering system, characterized in that it comprises a first rotary shaft (31) connectable to a steering wheel (100) so as to rotate synchronously with the steering wheel (100), a second rotary shaft (32) connectable in transmission with a wheel, and a decoupling device (200) for decoupling or coupling the first rotary shaft (31) and the second rotary shaft (32).

2. Steering system according to claim 1, characterized in that said second rotating shaft (32) is arranged at the end of said first rotating shaft (31) remote from said steering wheel (100) and coaxial with said first rotating shaft (31), said decoupling means (200) comprising: a slider (201) disposed outside the first and second shafts (31, 32) and a drive member for driving the slider (201) to translate along the axial direction of the first and second shafts (31, 32) to decouple or couple the first and second shafts (31, 32).

3. The steering system according to claim 2, wherein the sliding block (201) is a sleeve which is sleeved outside the first rotating shaft (31) or the second rotating shaft (32).

4. A steering system according to claim 3, wherein the sleeve has an inner peripheral surface formed with first internal splines that are spline-connectable to the first rotating shaft (31) and second internal splines that are spline-connectable to the second rotating shaft (32); the first inner spline and/or the second inner spline are trapezoidal splines arranged in the axial direction parallel to the sleeve, and trapezoidal outer splines capable of being in gradient fit with the trapezoidal inner splines are formed on the first rotating shaft (31) and/or the second rotating shaft (32).

5. A steering system according to claim 3, wherein a bearing (203) is coaxially fixed outside the sleeve, and an outer ring of the bearing (203) is connected with the driving member to drive the sleeve to axially translate under the driving of the driving member.

6. A steering system according to claim 5, characterized in that the drive member comprises a motor (206), a lead screw (207) coaxially fixed to an output shaft of the motor (206), and a drive block (202) threadedly connected to the lead screw (207), the drive block (202) being fixed to an outer ring of the bearing (203).

7. The steering system according to any one of claims 2 to 6, wherein the uncoupling device (200) further comprises a skeleton (205) inside which a cavity is formed, the slider (201) being housed inside said cavity, the driving element being located outside said cavity; the first rotating shaft (31) and the second rotating shaft (32) respectively extend into a cavity of the framework (205) from two axial ends of the framework (205); the second rotating shaft (32) is fixed with the framework (205), and the first rotating shaft (31) is rotatably connected with the framework (205) through a rotating bearing.

8. The steering system according to claim 7, wherein a coupling limit surface capable of abutting against an end surface of one axial end of the slider (201) at a coupling position to limit an amount of displacement of one axial side of the slider (201), and a decoupling limit surface capable of abutting against a limit step formed on an outer side wall of the slider (201) at a decoupling position to limit an amount of displacement of the other axial side of the slider (201) are formed in the cavity.

9. The steering system according to claim 1, characterized in that the steering wheel (100) comprises a steering wheel body and a hollow connecting column arranged on one side of the steering wheel body facing the first rotating shaft (31), the first rotating shaft (31) can extend into the hollow connecting column and is in splined connection with the hollow connecting column, and one end of the first rotating shaft (31) far away from the second rotating shaft (32) is used for being in threaded connection with a limit nut (1) abutting against the end face of the hollow connecting column to limit axial translation of the first rotating shaft (31).

10. A motor vehicle, characterized in that it comprises a steering system according to any one of claims 1-9.

Images