CN210391292U

CN210391292U - Steering intermediate shaft structure and steering device

Info

Publication number: CN210391292U
Application number: CN201920927817.1U
Authority: CN
Inventors: 谢常云; 滕晓涛; 汪璟; 林成杰
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-04-24
Anticipated expiration: 2029-06-18

Abstract

The utility model provides a turn to jackshaft structure, including jackshaft, bush subassembly and first festival fork subassembly, first festival fork subassembly includes first festival fork and second festival fork, the bush subassembly includes bush outer tube, bush inner tube and elastic element, the elastic element cover is located the bush outer tube with between the bush inner tube, bush outer tube cover is located in the first festival fork, the first pot head of jackshaft is located in the bush inner tube, the first end of jackshaft is equipped with the bellying, the spacing groove has been seted up on the lateral wall of first festival fork, the bellying hold in the spacing groove. The utility model also provides a turn to the device, including foretell jackshaft structure that turns to. The utility model provides a turn to jackshaft structure and turn to device absorbs the vibrations that the vehicle produced when jolting to the steering wheel through elastic element, and the homoenergetic makes driver effective control steering wheel under the torsional state of big moment and little moment simultaneously.

Description

Steering intermediate shaft structure and steering device

Technical Field

The utility model relates to an automobile steering technical field especially relates to a turn to jackshaft structure and turn to device.

Background

The steering column and the steering gear are main parts in the structure of the automobile steering device, the steering column is connected with a steering wheel, the steering column and the steering gear are connected through a steering intermediate shaft, a driver rotates the steering wheel, the steering column twists along with the steering column, the steering intermediate shaft transmits output torque from the steering column to the steering gear, and the automobile is steered through the steering gear. However, because the road conditions is complicated, the road surface of frustration easily makes the vehicle produce jolting at the in-process of traveling, in the high frequency excitation road surface very much, strong impact passes through the tire, the steering gear is transmitted to the suspension, turns to and is rigid connection between jackshaft and steering gear and the steering column, and such impact force can transmit to the steering wheel, brings discomfort for driver's operation, can influence steering wheel control initiation accident seriously.

Therefore, the control performance requirement of the intermediate steering shaft is very important, and the intermediate steering shaft not only can meet the requirement of transmitting smaller steering torque in normal driving, but also can ensure that a driver can bear larger torsional force in the process of quickly rotating the steering wheel when a steering power-assisted system fails, and simultaneously can effectively buffer the recoil force and still control the steering wheel when the road condition is uneven or violent impact occurs. Therefore, it is particularly important to provide a buffer structure on the intermediate steering shaft.

An intermediate shaft structure is arranged outside a steering intermediate shaft to weaken the swing shock, but the structure can realize shock absorption only by adjusting the mass of a steel ring, a circular tube and the like in the structure according to the natural frequency of a steering column pipe column to ensure that the natural frequency of the device is consistent with the natural frequency of the steering column pipe column, so the structural design is not easy to control, and the processing cost is increased; the other intermediate shaft structure is that a corrugated pipe and a rubber element are additionally arranged in the axial direction of one end of a steering intermediate shaft, or the rubber element is directly assembled with the intermediate shaft, the maximum torque which can be borne by the rubber element is limited, and the rubber element is easy to loosen or damage and lose efficacy after long-term service.

The foregoing description is provided for general background information and is not admitted to be prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a turn to jackshaft structure and a steering system, aim at buffering or filter the vehicle and go the impact force that produces on jolting the road surface, guarantee simultaneously that buffer structure can stable work under the long-term labour of great moment of torsion, do not lead to the problem that wearing and tearing drop.

The utility model provides a turn to jackshaft structure, including jackshaft, bush subassembly and first festival fork subassembly, first festival fork subassembly includes first festival fork and second festival fork, the bush subassembly with first festival fork subassembly is located the first end of jackshaft, the bush subassembly includes bush outer tube, bush inner tube and elastic element, the elastic element cover is located the bush outer tube with between the bush inner tube, bush outer tube cover is located in the first festival fork, the first pot head of jackshaft is located intraductal in the bush, the first end of jackshaft is equipped with the bellying, the spacing groove has been seted up on the lateral wall of first festival fork, the bellying hold in the spacing groove.

Wherein the elastic element is a rubber sleeve.

The bushing outer pipe and the first section fork are in interference fit, and the bushing inner pipe and the intermediate shaft are in interference fit.

Wherein, the width of spacing groove is greater than the width of bellying.

The first yoke assembly further comprises a first cross shaft, and the first yoke and the second yoke are rotatably connected through the first cross shaft.

The steering intermediate shaft structure further comprises a second yoke assembly, the second yoke assembly comprises a third yoke, a fourth yoke and a second cross shaft, the second end of the intermediate shaft is connected to the third yoke, and the third yoke is rotatably connected with the fourth yoke through the second cross shaft.

Wherein the intermediate shaft comprises a first pipe and a second pipe which are connected with each other, and the joint of the first pipe and the second pipe is sealed by a sealing element.

Wherein the bushing assembly is sleeved at one end of the first pipe which is not connected with the second pipe.

The limiting groove of the first section fork is a U-shaped groove and is arranged on the side wall of the first section fork in a penetrating mode.

According to another aspect of the present invention, there is also provided a steering device including the steering intermediate shaft structure as described in any one of the above.

The utility model provides a turn to jackshaft structure and a steering system has following beneficial effect:

1. the utility model discloses assemble on the jackshaft that turns to in the bush subassembly, absorb the vibrations that jolt and produce to the steering wheel in the vehicle driving process through the elastic element in the bush subassembly, promoted the driver under the harsh road surface environment effectively control to the steering wheel, also reduced simultaneously because of vibrations the loss to other parts in the steering device;

2. the utility model can offset the reverse torsion force from the ground through the deformation of the elastic element in the normal driving state, thereby avoiding the interference to the driver when controlling the steering wheel; under the extreme driving state, the hard contact is realized by the mutual interference of the convex part on the steering intermediate shaft and the limiting groove on the first yoke, so that a driver utilizes the steering wheel to carry out large-torque torsion so as to resist against huge reverse torsion force from the ground, and the effective control of the steering wheel by the driver under the extreme driving state is promoted;

3. the utility model discloses set up elastic element in the bush subassembly, assemble on turning to the jackshaft through the bush subassembly, avoided elastic element and steering spindle direct coupling and lead to not hard up or damage under the long-term service, promoted elastic element's life, improved cushioning effect's stability, the bush subassembly is also conveniently dismantled in addition and is changed, has reduced the maintenance cost.

Drawings

Fig. 1 is a schematic structural view of a steering intermediate shaft structure according to a first embodiment of the present invention.

Fig. 2 is a schematic view of the structure of an intermediate shaft of the steering intermediate shaft structure shown in fig. 1.

Fig. 3 is a schematic structural view of a joint of an intermediate shaft and a first yoke of the steering intermediate shaft structure shown in fig. 1.

FIG. 4 is a schematic structural view of a first yoke assembly of the steer countershaft configuration shown in FIG. 1.

FIG. 5 is a schematic structural view of a second yoke assembly of the steer countershaft configuration shown in FIG. 1.

Fig. 6 is a schematic view of a bushing assembly of the steering countershaft structure shown in fig. 1.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Example one

As shown in fig. 1, the steering intermediate shaft structure provided in this embodiment includes an intermediate shaft 1, a first yoke assembly 2, a second yoke assembly 3, and a bushing assembly 4, where the first yoke assembly 2 and the bushing assembly 4 are disposed at a first end of the intermediate shaft 1, the bushing assembly 4 is sleeved between the first yoke assembly 2 and the intermediate shaft 1, and the second yoke assembly 3 is disposed at a second end of the intermediate shaft 1.

As shown in fig. 2, in the present embodiment, the intermediate shaft 1 includes a first pipe 11 and a second pipe 12 connected to each other, and a joint of the first pipe 11 and the second pipe 12 is sealed by a seal 13. Specifically, the second pipe 12 is inserted into the first pipe 11 through the spline 121. The split type intermediate shaft 1 is convenient to adjust according to the distance between the steering gear and the steering column, can properly buffer the recoil force generated in the axial direction in the running process of a vehicle on a bumpy road surface, reduces the impact on other parts in the axial direction and the abnormal sound generated, and relieves the deformation pressure of the lining component 4. Specifically, the second pipe 12 is provided at an end of the first pipe 11 where the first yoke assembly 2 and the bush assembly 4 are not provided.

Referring to fig. 1, 2 and 3, a boss 111 is radially and outwardly extended from an end surface of the first end of the intermediate shaft 1.

As shown in fig. 4, in the present embodiment, the first yoke assembly 2 includes a first yoke 21, a second yoke 22, and a first cross 23, and the first yoke 21 and the second yoke 22 are rotatably connected by the first cross 23. Specifically, the first yoke 21 is rotatably connected to the first cross 23, the second yoke 22 is rotatably connected to the second cross 23, and the rotational axes of the first yoke 21 and the first cross 23 are perpendicular to the rotational axes of the second yoke 22 and the first cross 23.

The side wall of the first yoke 21 is provided with a limit groove 211, and the boss 111 of the intermediate shaft 1 is accommodated in the limit groove 211. Specifically, the width of spacing groove 211 is greater than the width of bellying 111, and when the assembly, bellying 111 of jackshaft 1 is set up in the tank bottom intermediate position of spacing groove 211, and like this, the distance of bellying 111 and spacing groove 211 both ends edge is equal, no matter when the driver is turned to forward or reversely, the homoenergetic guarantees that bushing assembly 4 realizes equivalent buffering in two kinds of relative torsional force directions. Specifically, the spacing groove 211 can be U type groove, link up and set up on the lateral wall of first section fork 21, and two spacing grooves 211 set up relatively, and the notch in every U type groove all communicates with the spill limit of first section fork 21 mutually, and the jackshaft 1 assembles the back of lining subassembly 4, and the suit is in first section fork 21 again, and the bellying 111 of the first end of jackshaft 1 also sets up to two relatively, directly carries on in U type inslot, and such design enables the convenient simple of assembly means. Similarly, the opening position, the opening number, and the opening shape of the limiting groove 211, and the installation position, the installation number, and the installation shape of the protruding portion 111 in the present embodiment may be changed accordingly, for example, the limiting groove 211 is formed on the inner side wall of the first yoke 21, and the limiting groove 211 is trapezoidal, so long as there is no contradiction between the combinations of the technical features, the ranges of the limiting groove 211 and the limiting groove should be considered as the ranges described in the present specification.

Referring to fig. 5, in the present embodiment, the second yoke assembly 3 includes a third yoke 31, a fourth yoke 32 and a second cross shaft 33, the second end of the intermediate shaft 1 is connected to the third yoke 31, and the third yoke 31 is rotatably connected to the fourth yoke 32 through the second cross shaft 33. Specifically, the third yoke 31 is rotatably connected to the second cross shaft 33, the fourth yoke 32 is rotatably connected to the second cross shaft 33, and the rotational axes of the third yoke 31 and the second cross shaft 33 are perpendicular to the rotational axes of the fourth yoke 32 and the second cross shaft 33. Therefore, two ends of the intermediate shaft 1 can be flexibly connected with a steering gear and a steering column which are arranged in a non-parallel or non-coaxial space, and the effective transmission of torque is realized.

As shown in fig. 6, in the present embodiment, the bushing assembly 4 includes an elastic element 41, a bushing outer tube 42 and a bushing inner tube 43, the elastic element 41 is sleeved between the bushing outer tube 42 and the bushing inner tube 43, the bushing outer tube 42 is sleeved in the first yoke 21, and the first end of the intermediate shaft 1 is sleeved in the bushing inner tube 43.

In this embodiment, the elastic element 41 is preferably a rubber sleeve, and is disposed between the bushing outer tube 42 and the bushing inner tube 43, and vulcanized with the bushing outer tube 42 and the bushing inner tube 43 to form an integral piece, and the bushing outer tube 42 is in interference fit with the first yoke 21, and the bushing inner tube 43 is in interference fit with the intermediate shaft 1. Therefore, when the first yoke 21 and the intermediate shaft 1 are twisted, torque can be effectively transmitted, the elastic element 41 can be prevented from being directly contacted with the first yoke 21 and the intermediate shaft 1, abrasion or falling off under a long-term torsional service state is prevented, and the buffering and damping performance is disabled.

Elastic element 41 in this embodiment, can not only offset the reverse torsional resistance that ground produced to a certain extent, can also absorb the vibrations that produce at the bumpy road surface, especially when going on the high-frequency excitation road surface, the vehicle undulates and produces violent vibrations, tire and chassis will shake transmission to jackshaft 1 through the steering gear, the elastic element 41 of jackshaft 1 first end attenuates from axial vibrations, make its impact to the steering wheel weaken, the driver has been promoted and has been controlled the sense to the steering wheel in jolting road surface is gone, the security of driving has been increased. It should be noted that the material and shape of the elastic element 41 in the present embodiment may be changed accordingly, and the combination of these technical features should be considered as the scope described in the present specification as long as there is no contradiction.

Example two

The steering device provided in the embodiment comprises a steering intermediate shaft structure, a steering column and a steering gear. Turn to first festival fork subassembly 2 among the jackshaft structure and be connected with steering column, steering column is connected with the steering wheel, and second festival fork subassembly 3 is connected with the steering gear, is connected with jackshaft 1 between first festival fork subassembly 2 and the second festival fork subassembly 3.

The working principle of the steering intermediate shaft structure and the steering device is as follows: when a driver twists the steering wheel in the normal driving process, the steering column pulls the first yoke assembly 2 to drive the intermediate shaft 1 to rotate along with the steering wheel in the same direction, the torsional force is transmitted to the steering gear through the second yoke assembly 3, the driving direction of the automobile is changed, meanwhile, resistance opposite to the steering force is generated by friction between tires and the ground when the tires are steered, the reverse torsional resistance is transmitted to the first yoke assembly 2 through the steering gear, the second yoke assembly 3 and the intermediate shaft 1 in sequence, because the first end of the intermediate shaft 1 is in interference fit with the lining inner tube 43, the lining outer tube 42 is in interference fit with the first yoke 21, the torsional directions of the lining inner tube 43 and the intermediate shaft 1 and the reverse torsional resistance are kept consistent, the torsional directions of the lining outer tube 42 and the first yoke assembly 2 and the steering wheel torsional direction are kept consistent, and the torsional forces opposite to the two directions are concentrated in the elastic element 41 between the lining outer tube 42 and the lining inner tube 43, the elastic element 41 is twisted to a certain degree to offset the reverse torsional resistance, and the steering column and the steering wheel connected to one end of the first yoke assembly 2 cannot deflect along with the reverse torsional resistance, so that a driver cannot feel the reverse torsional resistance from the ground during steering, and the control experience of the steering wheel is improved.

On the other hand, when an emergency occurs, when the steering assist system fails, the driver quickly turns the steering wheel, or the steering wheel is turned to the tail end at the moment of collision, and the driver still continues to turn the steering wheel, under these conditions, the torsion moment to be borne by the intermediate shaft 1 generally reaches more than 250N · m, at this time, the deformation of the elastic element 41 is insufficient to counteract the large torsion force, so that the torsion force drives the first yoke assembly 2 and the intermediate shaft 1 to relatively rotate around the axial direction, the edge of the limiting groove 211 of the first yoke 21 rotates to the protruding portion 111 of the intermediate shaft 1 along with the rotation, and the hard contact facilitates the driver to continuously increase the torsion force of the steering wheel, so as to resist the large reverse torsion resistance from the ground, and realize the effective control of the steering wheel under the extreme conditions.

According to the utility model discloses a still another aspect provides a turn to device, include as above-mentioned the jackshaft structure that turns to, can absorb the vibrations that jolt and produce the steering wheel among the vehicle driving process through elastic element 41 among the bush subassembly 4, all guarantee the driver to realize effective control to the steering wheel under the torsional mode of big moment and little moment simultaneously.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the sake of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a turn to jackshaft structure, its characterized in that includes jackshaft, bush subassembly and first section fork subassembly, first section fork subassembly includes first section fork and second section fork, the bush subassembly with first section fork subassembly is located the first end of jackshaft, the bush subassembly includes bush outer tube, bush inner tube and elastic element, the elastic element cover is located the bush outer tube with between the bush inner tube, bush outer tube cover is located in the first section fork, the first pot head of jackshaft is located in the bush inner tube, the first end of jackshaft is equipped with the bellying, the spacing groove has been seted up on the lateral wall of first section fork, the bellying hold in the spacing groove.

2. A steering countershaft structure according to claim 1, wherein said elastic member is a rubber sleeve.

3. The steer countershaft structure of claim 1, wherein the outer bushing tube is an interference fit with the first yoke and the inner bushing tube is an interference fit with the countershaft.

4. A steering intermediate shaft structure according to claim 1, wherein the width of the stopper groove is larger than the width of the boss portion.

5. The steer countershaft structure of claim 1, wherein the first yoke assembly further comprises a first cross, the first yoke being rotationally coupled to the second yoke via the first cross.

6. A steering countershaft structure as defined in claim 1, further comprising a second yoke assembly including a third yoke, a fourth yoke, and a second cross, said countershaft having a second end connected to said third yoke, said third yoke being rotatably connected to said fourth yoke by said third cross.

7. A steering intermediate shaft structure according to claim 1, wherein the intermediate shaft comprises a first tube and a second tube connected to each other, and a joint of the first tube and the second tube is sealed by a seal.

8. The steer intermediate axle construction of claim 7, wherein said bushing assembly is sleeved over an end of said first tube not connected to said second tube.

9. The steer countershaft structure of claim 1, wherein the first yoke limit groove is a U-shaped groove cut through a side wall of the first yoke.

10. A steering device, characterized by comprising the steering intermediate shaft structure according to any one of claims 1 to 9.