CN218806059U - Steering transmission shaft assembly, steering system and vehicle - Google Patents

Abstract

The embodiment of the utility model provides a relate to car a steering system technical field discloses a steering transmission axle subassembly, a steering system and vehicle, wherein the steering transmission axle subassembly includes: the steering device comprises a first steering shaft, a second steering shaft and a damping transmission part, wherein the output end of the first steering shaft is provided with a first nesting part; the input end of the second steering shaft is provided with a second nested part, and the first nested part is sleeved outside the second nested part, or the second nested part is sleeved outside the first nested part; an installation cavity is formed between the first nesting part and the second nesting part; the shock attenuation transmission portion includes: the damping device comprises a lining outer pipe, a lining inner pipe and a damping interlayer, wherein a torque reinforcing part is arranged between the damping interlayer and the lining inner pipe and/or between the damping interlayer and the lining outer pipe. By applying the technical scheme of the invention, the vibration transmitted from the wheels to the steering wheel can be effectively inhibited, the stability of a steering system is improved, and the NVH performance of the automobile is improved.

Description

Steering transmission shaft assembly, steering system and vehicle

Technical Field

The embodiment of the application relates to the technical field of automobile steering systems, in particular to a steering transmission shaft assembly, a steering system and a vehicle.

Background

In an automotive system, the power transmission system from the steering wheel to the wheels is referred to as a steering system. As is well known, a vehicle steering system is a mechanism for maintaining or changing the direction of travel of an automobile; when the driver controls the corner of the front wheel by hand force, the vehicle is ensured to change the driving direction according to the intention of the driver. The automobile steering system is largely classified into a mechanical type and a power type according to a steering gear, in which the mechanical steering system rotates a steering wheel by a driver's hand force, and the power steering system can relieve the driver's hand force and relieve the driver's tension.

No matter the automobile adopting the mechanical steering system or the automobile adopting the power steering system is adopted, the influence of excitation frequencies of different road surfaces can be received in the normal driving process of the automobile, so that a driver can obviously feel the vibration of a steering wheel, the driving comfort of the automobile is reduced, and the user experience is poor.

Disclosure of Invention

In order to solve the above problem, the embodiment of the application provides a steering transmission shaft assembly, a steering system and a vehicle, which can effectively reduce the influence of excitation frequencies on different road surfaces on an automobile steering system, avoid the steering wheel from generating obvious vibration, and improve the driving comfort of the automobile.

In one aspect, an embodiment of the present application provides a steering transmission shaft assembly, including: the output end of the first steering shaft is provided with a first nesting part; the input end of the second steering shaft is provided with a second nesting part, and the first nesting part is sleeved outside the second nesting part, or the second nesting part is sleeved outside the first nesting part; a mounting cavity is formed between the first nesting part and the second nesting part; damping transmission portion, damping transmission portion includes: the outer side wall of the bushing outer pipe is fixedly connected with a second inner side wall of the mounting cavity, and the second inner side wall is a first steering shaft far away from the axis of the first steering shaft; the damping interlayer is clamped between the bushing outer pipe and the bushing inner pipe; and a torque reinforcing part is arranged between the damping interlayer and the inner pipe of the lining and/or between the damping interlayer and the outer pipe of the lining.

Optionally, the torque intensifier portion comprises: the first bulge is arranged on the inner side wall of the bushing outer pipe; first recess, first recess setting is on shock attenuation intermediate layer's lateral wall, and first protruding joint is in first recess.

Optionally, the torque intensifier portion comprises: the second bulge is arranged on the outer side wall of the inner pipe of the bushing; the second recess, the second recess setting is on shock attenuation intermediate layer's inside wall, and the protruding joint of second is in the second recess.

Optionally, the torque intensifier portion comprises: the first bulge is arranged on the inner side wall of the bushing outer pipe; the first groove is formed in the outer side wall of the shock absorption interlayer, and the first bulge is clamped in the first groove; the second bulge is arranged on the outer side wall of the inner pipe of the bushing; the second groove is formed in the inner side wall of the shock absorption interlayer, and the second bulge is clamped in the second groove; wherein the distance between the top of the first protrusion and the axis of the steering transmission shaft assembly is smaller than the distance between the top of the second protrusion and the axis of the steering transmission shaft assembly.

Optionally, the first projection extends in an axial direction of the liner outer tube; the first groove extends in the axial direction of the shock-absorbing interlayer.

Optionally, the first protrusions are multiple, and the multiple first protrusions are arranged at equal intervals along the circumferential direction of the outer sleeve of the bushing; first recess is a plurality of, and a plurality of first recesses are along shock attenuation intermediate layer's circumference equidistance interval setting, a plurality of first archs and a plurality of first recess one-to-one ground joint.

Optionally, the second protrusion extends in an axial direction of the liner inner tube; the second groove extends in the axial direction of the shock-absorbing interlayer.

Optionally, the number of the second protrusions is multiple, and the multiple second protrusions are arranged at equal intervals along the circumferential direction of the inner pipe of the bushing; the second recess is a plurality of, and a plurality of second recesses set up along shock attenuation intermediate layer's circumference equidistance interval, and a plurality of second are protruding to be blocked joint with a plurality of second recesses one-to-one.

On the other hand, the embodiment of the application further provides a steering system, the steering system comprises a steering transmission shaft assembly, a steering driving portion and a steering gear assembly, the steering transmission shaft assembly is the steering transmission shaft assembly, the steering driving portion is in driving connection with the first steering shaft, the steering gear assembly is in driving connection with the second steering shaft, the steering system further comprises a yielding cavity, the yielding cavity is communicated with the installation cavity, the yielding cavity extends along the axial direction of the damping interlayer, the yielding cavity is arranged in the first nesting portion under the condition that the first nesting portion is sleeved outside the second nesting portion, and the yielding cavity is used for yielding the movement of the second nesting portion, the inner pipe of the bushing and the damping interlayer; under the condition that the second nested portion is sleeved outside the first nested portion, the yielding cavity is arranged in the second nested portion and used for yielding the first nested portion, the inner pipe of the bushing and the shock absorption interlayer.

In another aspect, an embodiment of the present application further provides a vehicle, where the vehicle includes a steering system, and the steering system is the steering system described above.

The application provides a steering transmission shaft subassembly's beneficial effect lies in: compared with the prior art, the steering transmission shaft assembly provided by the application ensures the rigid connection between the damping transmission part and the output end of the first steering shaft by arranging the inner side wall of the bushing inner pipe in the damping transmission part to be fixedly connected with the first inner side wall of the mounting cavity; through the lateral wall that sets up the bush outer tube in the damping transmission portion to the first steering spindle of second inside wall fixed connection with the installation cavity, guaranteed the rigid connection of the output of damping transmission portion and second steering spindle to make the moment of torsion on the output of the first steering spindle that this application provided can transmit on the input of second steering spindle through the damping rotation portion.

Meanwhile, the steering transmission shaft assembly provided by the application enables the bushing outer pipe and the bushing inner pipe to be capable of transmitting through the damping interlayer by arranging the damping interlayer between the bushing outer pipe and the bushing inner pipe, and the damping interlayer has higher compression modulus, so that the radial rigidity between the bushing outer pipe and the bushing inner pipe is effectively reduced, and the steering transmission shaft assembly provided by the application has better damping effect; therefore, the steering system using the steering transmission shaft assembly provided by the application can inhibit the Vibration transmitted to the steering wheel by the wheels, improve the stability of the steering system and improve the NVH (Noise, vibration and Harshness) performance of the automobile.

Drawings

FIG. 1 is a partial cross-sectional view of a steering system provided in an embodiment of the present application;

FIG. 2 is a sectional view of a damper transmission provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a steering system with parts removed according to an embodiment of the present application.

Reference numerals:

10-a steering drive section; 11-a first steering shaft; 111-a first nest;

20-a diverter assembly; 21-a second steering shaft; 211-a second nest; 22-the assembly body;

30-a damping transmission part; 31-a liner outer tube; 32-a liner inner tube; 33-a shock-absorbing interlayer;

40-a mounting cavity;

50-abdicating cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are intended to illustrate the present application, but are not intended to limit the scope of the present application.

Referring to fig. 1-3, according to one aspect of the present application, an embodiment of the present application provides a steering driveshaft assembly comprising: the steering device comprises a first steering shaft 11, a second steering shaft 21 and a damping transmission part 30, wherein the output end of the first steering shaft 11 is provided with a first nesting part 111; the input end of the second steering shaft 21 is provided with a second nesting part 211, the first nesting part 111 is sleeved outside the second nesting part 211, or the second nesting part 211 is sleeved outside the first nesting part 111; a mounting cavity 40 is formed between the first nesting part 111 and the second nesting part 211; the damper transmission portion 30 includes: the damping structure comprises a bushing outer pipe 31, a bushing inner pipe 32 and a damping interlayer 33, wherein the bushing outer pipe 31 is sleeved outside the bushing inner pipe 32, the inner side wall of the bushing inner pipe 32 is fixedly connected with a first inner side wall of the mounting cavity 40, the first inner side wall is a side wall close to the axle center of a first steering shaft, the outer side wall of the bushing outer pipe 31 is fixedly connected with a second inner side wall of the mounting cavity 40, and the second inner side wall is a side wall far away from the axle center of the first steering shaft; the damper interlayer 33 is interposed between the liner outer tube 31 and the liner inner tube 32; a torque reinforcement is provided between the damper interlayer 33 and the liner inner tube 32, and/or between the damper interlayer 33 and the liner outer tube 31.

According to the steering transmission shaft assembly provided by the embodiment, the inner side wall of the inner pipe of the bushing in the damping transmission part is fixedly connected with the first inner side wall of the mounting cavity, so that the rigid connection between the damping transmission part and the output end of the first steering shaft is ensured;

through the lateral wall that sets up the bush outer tube in the damping transmission portion to the second inside wall fixed connection with the installation cavity, guaranteed the rigid connection of damping transmission portion and the output of second steering spindle to make the moment of torsion on the output of the first steering spindle that this embodiment provided can transmit on the input of second steering spindle through the damping rotation portion.

Meanwhile, the steering transmission shaft assembly provided by the embodiment has the advantages that the damping interlayer is arranged between the bushing outer pipe and the bushing inner pipe, so that the bushing outer pipe and the bushing inner pipe can be driven through the damping interlayer;

in addition, the steering transmission shaft assembly provided by the embodiment has the advantages that the torque transmission efficiency between the damping interlayer and the inner pipe of the bushing and/or between the outer pipe of the bushing is effectively improved by arranging the torque reinforcing part between the damping interlayer and the inner pipe of the bushing and/or between the damping interlayer and the outer pipe of the bushing, so that the torque loss between the first steering shaft and the second steering shaft is reduced;

therefore, the steering system using the steering transmission shaft assembly provided by the embodiment can inhibit the vibration transmitted to the steering wheel by the wheels, improve the stability of the steering system and improve the NVH performance of the automobile.

In a specific embodiment, the torque intensifier in the present embodiment includes: a first protrusion and a first groove, wherein the first protrusion is disposed on an inner sidewall of the bushing outer tube 31; first recess setting is on the lateral wall of shock attenuation intermediate layer 33, and first protruding joint is in first recess. Because the damper interlayer 33 has a smaller shear modulus, the torque reinforcement portion provided in this embodiment has the first protrusion and the first groove respectively disposed on the inner sidewall of the bushing outer tube 31 and the outer sidewall of the damper interlayer 33, and the first protrusion is clamped in the first groove, so as to effectively improve the torsional rigidity of the damper transmission portion 30, and enable the rotation angle of the second steering shaft 21 to be consistent with the rotation angle of the first steering shaft 11 as much as possible, thereby reducing the torque loss transmitted from the steering driving portion 10 to the steering gear assembly 20.

In another embodiment, the torque amplifying section in the present embodiment includes: a second protrusion and a second groove, wherein the second protrusion is disposed on the outer sidewall of the liner inner tube 32; the second recess sets up on the inside wall of shock attenuation intermediate layer 33, and the protruding joint of second is in the second recess. Because the shock-absorbing interlayer 33 has a smaller shear modulus, the torque-reinforcing portion provided by this embodiment respectively has a second protrusion and a second groove on the outer sidewall of the bushing inner tube 32 and the inner sidewall of the shock-absorbing interlayer 33, and the second protrusion is clamped in the second groove, thereby effectively improving the torsional rigidity of the shock-absorbing transmission portion 30, enabling the rotation angle of the second steering shaft 21 to be kept as consistent as possible with the rotation angle of the first steering shaft 11, and reducing the torque loss transmitted from the steering driving portion 10 to the steering gear assembly 20.

In a preferred embodiment, the torque amplification part in the present embodiment includes: the bushing outer pipe 31 comprises a first bulge, a first groove, a second bulge and a second groove, wherein the first bulge is arranged on the inner side wall of the bushing outer pipe 31; the first groove is formed in the outer side wall of the shock absorption interlayer 33, and the first bulge is clamped in the first groove; the second projection is provided on the outer side wall of the liner inner tube 32; the second recess sets up on the inside wall of shock attenuation intermediate layer 33, and the protruding joint of second is in the second recess, and the distance between first bellied top and the steering transmission axle subassembly axle center is less than, the distance between bellied top of second and the steering transmission axle subassembly axis. Because the damping interlayer 33 has a smaller shear modulus, the torque reinforcement portion provided by the embodiment respectively sets the first protrusion and the first groove on the inner sidewall of the bushing outer tube 31 and the outer sidewall of the damping interlayer 33, and respectively sets the second protrusion and the second groove on the outer sidewall of the bushing inner tube 32 and the inner sidewall of the damping interlayer 33, and by setting the distance between the top of the first protrusion and the axis of the steering transmission shaft component to be smaller than the distance between the top of the second protrusion and the axis of the steering transmission shaft component, and setting the first protrusion and the second protrusion in a staggered manner, the first protrusion and the second protrusion can interact with each other under the condition that the first protrusion and the second protrusion are respectively clamped in the first groove and the second groove, thereby effectively improving the torsional rigidity of the damping transmission portion 30, enabling the rotation angle of the second steering shaft 21 to be kept consistent with the rotation angle of the first steering shaft 11 as much as possible, and reducing the torque loss transmitted from the steering driving portion 10 to the steering gear assembly 20.

Referring to fig. 1, in a specific embodiment, the first protrusion in this embodiment extends in the axial direction of the liner outer tube 31; the first groove extends in the axial direction of the damper interlayer 33.

Referring to fig. 2, in order to enable torque to be stably transmitted between the liner outer tube 31 and the damper interlayer 33 provided in the present embodiment, the first protrusions in the present embodiment are provided in plurality, and the plurality of first protrusions are arranged at equal intervals in the circumferential direction of the liner outer tube 31; first recess is a plurality of, and a plurality of first recesses are along the equidistant interval setting in circumference of shock attenuation intermediate layer 33, and a plurality of first archs and a plurality of first recess one-to-one ground joint. Through setting up a plurality of first archs that this embodiment provided along the circumference equidistance interval of bush outer tube 31, set up a plurality of first recesses along the circumference equidistance interval of shock-absorbing interlayer 33 simultaneously to make a plurality of first archs and a plurality of first recess joint one-to-one, alright make the stable transmission between the bush outer tube 31 that this embodiment provided of moment of torsion and shock-absorbing interlayer 33, also effectual improvement the life of the shock attenuation transmission portion 30 that this embodiment provided simultaneously.

In a preferred embodiment, a plurality of first clamping structures are arranged at the end part, close to the first groove, of the first protrusion provided by the embodiment, a plurality of second clamping structures are arranged at the bottom of the first groove provided by the embodiment, the first clamping structures are arranged at intervals along the length direction of the first protrusion, the second clamping structures are arranged at intervals along the length direction of the first groove, the first clamping structures correspond to the second clamping structures one to one, the first clamping structures can be clamped with the second clamping structures, and therefore the first protrusion can be clamped in the first groove.

In a preferred embodiment, the first clamping structure in this embodiment is a first bar-shaped protrusion, the second clamping structure is a first bar-shaped groove, and the first bar-shaped protrusion in this embodiment is matched with the first bar-shaped groove.

Referring to FIG. 1, in one particular embodiment, the second protrusions in this embodiment extend axially along the liner inner tube 32; the second groove extends in the axial direction of the damper interlayer 33.

Referring to fig. 2, in order to enable torque to be stably transmitted between the damper interlayer 33 and the bushing inner tube 32 provided in the present embodiment, the second protrusions in the present embodiment are provided in plurality, and the plurality of second protrusions are arranged at equal intervals in the circumferential direction of the bushing inner tube 32; the second recess is a plurality of, and a plurality of second recesses are along the equidistant interval setting of circumference of shock attenuation intermediate layer 33, and a plurality of second are protruding to be blocked joint with a plurality of second recesses one-to-one. Through setting up the equidistant interval of a plurality of second archs that this embodiment provided along the circumference of bush inner tube 32, set up a plurality of second recesses along the equidistant interval of the circumference of shock attenuation intermediate layer 33 simultaneously to make a plurality of second archs and a plurality of second recess one-to-one ground joint, alright make the stable transmission between the bush outer tube 31 that this embodiment provided of moment of torsion and shock attenuation intermediate layer 33, also the effectual life who improves the shock attenuation transmission portion 30 that this embodiment provided simultaneously.

In a preferred embodiment, a plurality of third clamping structures are arranged at the end part of the second protrusion close to the second groove, a plurality of fourth clamping structures are arranged at the bottom of the second groove, the third clamping structures are arranged at intervals along the length direction of the first protrusion, the fourth clamping structures are arranged at intervals along the length direction of the second groove, the third clamping structures correspond to the fourth clamping structures one to one, and the third clamping structures can be clamped with the fourth clamping structures, so that the second protrusion can be stably clamped in the second groove.

In a preferred embodiment, the third clamping structure is a second bar-shaped protrusion, the fourth clamping structure is a second bar-shaped groove, and the second bar-shaped protrusion and the second bar-shaped groove in this embodiment are matched.

Referring to fig. 2, according to another aspect of the present application, an embodiment of the present application provides a steering system, where the steering system includes a steering transmission shaft assembly, a steering driving portion and a steering gear assembly, the steering transmission shaft assembly is the transmission shaft assembly in the above embodiment, the steering driving portion is in driving connection with a first steering shaft, the steering gear assembly is in driving connection with a second steering shaft, the steering system further includes a yielding cavity 50, the yielding cavity 50 is communicated with the mounting cavity 40, the yielding cavity 50 extends along an axial direction of the shock absorbing interlayer 33, in a case where the first nesting portion 111 is nested outside the second nesting portion 211, the yielding cavity 50 is disposed inside the first nesting portion 111, and the yielding cavity 50 is used for yielding movement of the second nesting portion 211, the bushing inner tube 32 and the shock absorbing interlayer 33; under the condition that the second nesting part 211 is sleeved outside the first nesting part 111, the yielding cavity 50 is arranged in the second nesting part 211, and the yielding cavity 50 is used for yielding the movement of the first nesting part 111, the liner inner tube 32 and the shock absorption interlayer 33. By providing the abdicating cavity 50, the first steering shaft 11 provided by the present embodiment can axially shift in a direction approaching the second steering shaft 21 within a certain range, so as to effectively suppress the vibration transmitted from the wheels to the steering wheel, and the steering system provided by the present embodiment can stably operate.

In a preferred embodiment, an elastic resetting element is disposed in the avoiding cavity 50 in this embodiment, and the elastic resetting element provided in this embodiment can reset the first steering shaft 11 provided in this embodiment without an external force, so as to ensure a shock absorption effect of the steering system provided in this embodiment.

Referring to fig. 3, in a preferred embodiment, the steering driving portion 10 in this embodiment includes a steering wheel, a first end of the first steering shaft 11 is in driving connection with the steering wheel, and a second end of the first steering shaft 11 is an output end; the steering gear assembly 20 includes an assembly main body 22, a first end of the second steering shaft 21 is in driving connection with the assembly main body 22, and a second end of the second steering shaft 21 is an input end.

In a preferred embodiment, the material of the shock absorbing interlayer provided in this embodiment is rubber.

In a preferred embodiment, the damping interlayer 33 of the present embodiment is integrally formed with the liner outer tube 31 and the liner inner tube 32 by vulcanization.

In a preferred embodiment, the sidewall of the bushing inner tube 32 in this embodiment is in interference fit with the cavity wall of the installation cavity 40 close to the axis of the first steering shaft 11, and the sidewall of the bushing outer tube 31 is in interference fit with the cavity wall of the installation cavity 40 far from the axis of the first steering shaft 11.

In a specific embodiment, the first nesting portion 111 of the present embodiment is sleeved outside the second nesting portion 211, the first nesting portion 111 of the present embodiment is in spline connection with the outer bushing tube 31, and the second nesting portion 211 of the present embodiment is in spline connection with the inner bushing tube 32.

In another embodiment, the second nesting portion 211 in this embodiment is sleeved outside the first nesting portion 111, the second nesting portion 211 in this embodiment is in spline connection with the outer bushing tube 31, and the first nesting portion 111 in this embodiment is in spline connection with the inner bushing tube 32.

In a preferred embodiment, the first nesting portion 111 of the present embodiment is detachably mounted on the output end of the first steering shaft 11, and the second nesting portion 211 of the present embodiment is detachably mounted on the input end of the second steering shaft 21.

In a preferred embodiment, the first nesting portion 111 of the present embodiment is connected to the output end of the first steering shaft 11 by a threaded fastener.

In a preferred embodiment, the second nest 211 in this embodiment is connected to the input end of the second steering shaft 21 by a threaded fastener.

According to a further aspect of the present application, embodiments of the present application further provide a vehicle, where the vehicle includes a steering system, and the steering system is the steering system in each of the above embodiments.

In summary, the steering transmission shaft assembly, the steering system and the vehicle provided by the embodiment at least have the following beneficial technical effects: according to the steering transmission shaft assembly provided by the embodiment, the inner side wall of the inner pipe of the bushing in the damping transmission part is fixedly connected with the first inner side wall of the mounting cavity, so that the rigid connection between the damping transmission part and the output end of the first steering shaft is ensured; through the lateral wall that sets up the bush outer tube in the damping transmission portion to the second inside wall fixed connection with the installation cavity, guaranteed the rigid connection of damping transmission portion and the output of second steering spindle to make the moment of torsion on the output of the first steering spindle that this embodiment provided can transmit on the input of second steering spindle through the damping rotation portion. Meanwhile, the steering transmission shaft assembly provided by the embodiment has the advantages that the damping interlayer is arranged between the bushing outer pipe and the bushing inner pipe, so that the bushing outer pipe and the bushing inner pipe can be driven through the damping interlayer; in addition, the steering transmission shaft assembly provided by the embodiment has the advantages that the torque transmission efficiency between the damping interlayer and the inner pipe of the bushing and/or between the outer pipe of the bushing is effectively improved by arranging the torque reinforcing part between the damping interlayer and the inner pipe of the bushing and/or between the damping interlayer and the outer pipe of the bushing, so that the torque loss between the first steering shaft and the second steering shaft is reduced; therefore, the steering system using the steering transmission shaft assembly provided by the embodiment can inhibit the vibration transmitted to the steering wheel by the wheels, improve the stability of the steering system and improve the NVH performance of the automobile.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments. The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims (10)

1. A steering driveshaft assembly, comprising:

the steering device comprises a first steering shaft (11), wherein the output end of the first steering shaft (11) is provided with a first nesting part (111);

a second steering shaft (21), wherein a second nesting part (211) is arranged at the input end of the second steering shaft (21), the first nesting part (111) is sleeved outside the second nesting part (211), or the second nesting part (211) is sleeved outside the first nesting part (111); a mounting cavity (40) is formed between the first nesting part (111) and the second nesting part (211);

a damper transmission portion (30), the damper transmission portion (30) including: the steering wheel hub comprises a hub outer pipe (31), a hub inner pipe (32) and a damping interlayer (33), wherein the hub outer pipe (31) is sleeved outside the hub inner pipe (32), the inner side wall of the hub inner pipe (32) is fixedly connected with the first inner side wall of the mounting cavity (40), the first inner side wall is the side wall close to one side of the axis of the first steering shaft, the outer side wall of the hub outer pipe (31) is fixedly connected with the second inner side wall of the mounting cavity (40), and the second inner side wall is the side wall far away from the axis of the first steering shaft (11); the damping interlayer (33) is clamped between the bushing outer pipe (31) and the bushing inner pipe (32); a torque reinforcing part is arranged between the damping interlayer (33) and the lining inner pipe (32) and/or between the damping interlayer (33) and the lining outer pipe (31).

2. The steering driveshaft assembly of claim 1, wherein the torque intensifier comprises:

a first projection provided on an inner side wall of the liner outer tube (31);

the first groove is formed in the outer side wall of the shock absorption interlayer (33), and the first protrusion is clamped in the first groove.

3. The steering driveshaft assembly of claim 1, wherein the torque intensifier comprises:

a second protrusion provided on an outer side wall of the bushing inner tube (32);

the second groove is formed in the inner side wall of the shock absorption interlayer (33), and the second protrusion is clamped in the second groove.

4. The steering driveshaft assembly of claim 1, wherein the torque intensifier comprises:

a first protrusion provided on an inner sidewall of the bushing outer tube (31);

the first groove is formed in the outer side wall of the shock absorption interlayer (33), and the first bulge is clamped in the first groove;

a second protrusion provided on an outer side wall of the bushing inner tube (32);

the second groove is formed in the inner side wall of the shock absorption interlayer (33), and the second protrusion is clamped in the second groove;

wherein the distance between the top of the first projection and the axis of the steering transmission shaft assembly is smaller than the distance between the top of the second projection and the axis of the steering transmission shaft assembly.

5. Steering transmission shaft assembly according to claim 2 or 4, characterised in that the first projection extends in the axial direction of the bushing outer tube (31); the first groove extends in the axial direction of the damper sandwich layer (33).

6. The steering driveshaft assembly according to claim 5, characterized in that the first protrusions are plural, and are arranged at equal intervals in a circumferential direction of the bush outer tube (31); first recess is a plurality of, and is a plurality of first recess is followed the circumference equidistance interval of shock attenuation intermediate layer (33) sets up, and is a plurality of first arch is with a plurality of first recess one-to-one ground joint.

7. The steering driveshaft assembly according to claim 3 or 4, characterized in that the second projection extends in an axial direction of the bushing inner tube (32); the second groove extends in the axial direction of the damper sandwich layer (33).

8. The steering driveshaft assembly of claim 7, wherein the second protrusions are a plurality of the second protrusions, the plurality of the second protrusions being equally spaced circumferentially of the bushing inner tube (32); the second recess is a plurality of, and is a plurality of the second recess is followed the circumference equidistance interval of shock attenuation intermediate layer (33) sets up, and is a plurality of the second is protruding with a plurality of the joint of second recess one-to-one.

9. A steering system, characterized in that it comprises a steering transmission shaft assembly, a steering drive (10) and a steering gear assembly (20), said transmission shaft assembly being the transmission shaft assembly of any one of claims 1 to 8, said steering drive being in driving connection with said first steering shaft (11), said steering gear assembly (20) being in driving connection with said second steering shaft (21), said steering system further comprising a yielding chamber (50), said yielding chamber (50) being in communication with said mounting chamber (40), said yielding chamber (50) extending in the length direction of said shock-absorbing sandwich layer (33), said yielding chamber (50) being disposed within said first nesting portion (111) with said first nesting portion (111) being nested outside said second nesting portion (211), said yielding chamber (50) being for yielding the movement of said second nesting portion (211), said bush inner tube (32) and said shock-absorbing sandwich layer (33);

the second nested portion (211) cover is established under the outer condition of first nested portion (111), the chamber of stepping down (50) sets up in the second nested portion (211), it is right that the chamber of stepping down (50) are used for first nested portion (111), bush inner tube (32) reach the motion of shock attenuation intermediate layer (33) steps down.

10. A vehicle characterized by comprising a steering system as claimed in claim 9.

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