阅读说明：本技术 一种转向提升系统及特种车辆 (Steering lifting system and special vehicle ) 是由 肖梦魁 金鑫 贾文学 谢金铭 申红睿 刘玉红 武慧 王祚 于 2021-10-18 设计创作，主要内容包括：本发明提供了一种转向提升系统及特种车辆,转向提升系统包括：摇臂轴；转向摇臂,通过花键与摇臂轴连接,转向摇臂上设有内花键,摇臂轴上设有外花键,外花键包括直花键段和锥花键段,直花键段与内花键上下导向配合,锥花键段和内花键的分度圆尺寸由上至下逐渐增大；提升拨叉,第一端套在摇臂轴外部、第二端与提升动力机构连接,转向摇臂的第一端位于提升拨叉的上压板和下托板之间,上压板用于向下压紧转向摇臂,使之与锥花键段紧密的止转配合,下托板用于向上顶推转向摇臂,实现车轮总成的收起。本发明利用内花键与锥花键段的锥形特性,在压力下配合非常紧密,不存在配合间隙,解决了现有技术中轮胎无规则摆动、车辆无法实现陆地高速行驶的问题。(The invention provides a steering lifting system and a special vehicle, wherein the steering lifting system comprises: a rocker shaft; the steering rocker arm is connected with the rocker arm shaft through a spline, an internal spline is arranged on the steering rocker arm, an external spline is arranged on the rocker arm shaft, the external spline comprises a straight spline section and a conical spline section, the straight spline section is in up-down guide fit with the internal spline, and the reference circle sizes of the conical spline section and the internal spline are gradually increased from top to bottom; the lifting shifting fork is sleeved at the outer part of the rocker shaft, the second end of the lifting shifting fork is connected with the lifting power mechanism, the first end of the steering rocker arm is located between an upper pressing plate and a lower supporting plate of the lifting shifting fork, the upper pressing plate is used for pressing the steering rocker arm downwards to enable the steering rocker arm to be in close rotation stopping fit with the conical spline section, and the lower supporting plate is used for upwards pushing the steering rocker arm to achieve the folding of the wheel assembly. The invention utilizes the conical characteristic of the internal spline and the conical spline section, the fit is very tight under pressure, and no fit clearance exists, thus solving the problems that the tire irregularly swings and the vehicle can not realize high-speed land running in the prior art.)

1. A steer lift system, comprising:

the upper end of the rocker arm shaft is provided with a connecting structure for being in transmission connection with a steering gear, and the upper part and the lower part of the rocker arm shaft are respectively provided with a mounting structure for rotatably mounting the rocker arm shaft on a frame;

the first end of the steering rocker arm (4) is connected with the rocker arm shaft through a spline structure, and the second end of the steering rocker arm is used for being connected with a steering pull rod (19) arranged on a wheel knuckle arm;

the steering rocker arm (4) is provided with an internal spline, the rocker arm shaft is provided with an external spline matched with the internal spline, the external spline comprises a straight spline section (1-1) and a conical spline section (1-2) positioned below the straight spline section (1-1), the straight spline section (1-1) is used for being in guide sliding fit with the internal spline in the up-down direction, the size of the reference circle of the conical spline section (1-2) and the size of the reference circle of the internal spline are gradually increased from top to bottom, and the conical spline section (1-2) is used for being in spline fit with the internal spline so as to enable the rocker arm shaft to drive the steering rocker arm (4) to rotate when rotating;

the steering lift system further comprises:

the lifting shifting fork (5) is sleeved at the outer part of the rocker shaft, the second end of the lifting shifting fork is used for being connected with a lifting power mechanism, the first end of the lifting shifting fork (5) is provided with an upper pressure plate (5-1) and a lower supporting plate (5-2), the upper pressure plate (5-1) and the lower supporting plate (5-2) are respectively provided with a through hole for the rocker shaft to penetrate through, the first end of the steering rocker arm (4) is located between the upper pressure plate (5-1) and the lower supporting plate (5-2), the upper pressure plate (5-1) is used for pressing the steering rocker arm (4) downwards under the action force of the lifting power mechanism so that an internal spline of the steering rocker arm (4) is in rotation stopping fit with the conical spline section (1-2), and the lower supporting plate (5-2) is used for pushing the steering rocker arm (4) upwards under the reaction force of the lifting power mechanism so that the steering rocker arm (4) can be used for enabling the steering rocker arm (4), The steering pull rod (19) and the wheel steering knuckle arm move upwards to realize the retraction of the wheel assembly.

2. Steering lift system according to claim 1, characterised in that an elastic element is arranged between the upper pressure plate (5-1) and the first end of the steering rocker (4).

3. Steering lift system according to claim 2, characterised in that a spacer is arranged between the resilient member and the first end of the pitman arm (4).

4. Steering lift system according to claim 3, characterised in that the first end of the steering rocker arm (4) is provided with a mounting groove for mounting a shim on its upper end face.

5. The steering lifting system according to any one of claims 1 to 4, wherein the upper pressure plate (5-1) and the lower support plate (5-2) are both circular plates, and an arc-shaped connecting plate (5-3) is connected between the upper pressure plate (5-1) and the lower support plate (5-2) so that an opening for the first end of the steering rocker arm (4) to be inserted is formed between the upper pressure plate (5-1) and the lower support plate (5-2).

6. The steering lifting system according to any one of claims 1 to 4, wherein the lifting fork (5) further comprises a sleeve (5-4) connected below the lower support plate (5-2) and a connecting arm (5-5) having one end connected to the outer peripheral surface of the sleeve (5-4), the connecting arm (5-5) extends horizontally and is located below the steering rocker arm (4), and the other end of the connecting arm (5-5) forms the second end of the lifting fork (5).

7. The steering lifting system as claimed in claim 6, characterized in that the connecting arm (5-5) is fixed at its other end with a riser (5-6), the riser (5-6) being provided with a fixing hole for a fixed connection to a lifting power mechanism, the riser (5-6) being located outside the circumference of rotation of the second end of the steering rocker (4).

8. The steering lifting system according to any one of claims 1 to 4, wherein the mounting structure of the upper part of the rocker shaft comprises an upper support base (9) and an upper end cover (10) fixedly connected with the upper support base (9), the rocker shaft comprises a smooth shaft section (1-3) positioned above the external spline, the upper support base (9) and the upper end cover (10) are sleeved outside the smooth shaft section (1-3), a limiting structure positioned between the upper support base (9) and the upper end cover (10) to limit the upper support base (9) and the upper end cover (10) to move up and down is arranged on the outer circumferential surface of the smooth shaft section (1-3), and an upper connecting hole (9-1) fixedly connected with an upper bracket (16) fixedly connected with the frame is arranged on the upper support base (9).

9. Steering lift system according to claim 8, characterised in that the stop construction is a stop ring (12) which is fixed to the beam section (1-3) by means of fixing screws, the axes of which extend in the radial direction of the beam section (1-3).

10. A special vehicle comprising a frame and a steering lift system mounted on the frame, wherein the steering lift system is the same as the steering lift system of any one of claims 1 to 9.

Technical Field

The invention relates to a steering lifting system and a special vehicle.

Background

When the amphibious vehicle runs in water, the tires need to be lifted so as to reduce the volume of the tires in water, reduce the running resistance of the vehicle in water and improve the maximum navigational speed and the endurance mileage of the vehicle. The traditional vehicle is limited by the steering mechanism connected with the tires and cannot be greatly lifted, the lifting amount of the tires is limited, and the driving resistance of the vehicle in water is reduced to a limited extent.

The Chinese patent application with the application publication number of CN111114619A discloses a steering transmission system and a special vehicle, wherein the steering transmission system comprises a bogie, a steering knuckle arm and a knuckle arm pull rod, a vertical arm is fixedly connected to the bogie, the vertical arm is a spline shaft, one end of the knuckle arm pull rod is assembled on the vertical arm in a sliding mode through a sliding sleeve with an internal spline, and the other end of the knuckle arm pull rod is hinged to one end of the steering knuckle arm. When the wheel assembly needs to go up and down, the driving mechanism on the frame drives the knuckle arm pull rod, the steering knuckle arm and the wheel assembly to go up and down, and the sliding sleeve of the knuckle arm pull rod slides on the vertical arm at the moment so as to meet the requirements of lowering and retracting the wheel assembly in the vertical direction.

Above-mentioned steering transmission system is in order to guarantee the upper and lower slip that the knuckle arm pull rod can be smooth, and the internal spline on the sliding sleeve and the epaxial external spline of integral key are the straight spline, and must have the fit clearance between the two, and this clearance also leads to there being certain relative movement volume between the two, and then arouses that the vehicle is the irregular swing of tire when land is gone, can't realize that the vehicle land is high-speed to be gone, and the vehicle straight line is gone poor in stability, the operating stability is poor, the security needs further promotion.

Disclosure of Invention

The invention aims to provide a steering lifting system, which aims to solve the problems that the fit clearance exists in the existing steering transmission system, so that tires swing irregularly, and vehicles cannot run at high speed on land; the invention also aims to provide a special vehicle to solve the problems that the fitting clearance exists in the steering transmission system of the existing vehicle, so that tires swing irregularly, and the vehicle cannot run on the land at a high speed.

In order to achieve the purpose, the steering lifting system adopts the following technical scheme:

a steer lift system comprising:

the upper end of the rocker arm shaft is provided with a connecting structure for being in transmission connection with a steering gear, and the upper part and the lower part of the rocker arm shaft are respectively provided with a mounting structure for rotatably mounting the rocker arm shaft on a frame;

the first end of the steering rocker is connected with the rocker shaft through a spline structure, and the second end of the steering rocker is used for being connected with a steering pull rod arranged on a wheel knuckle arm;

the steering rocker arm is provided with an internal spline, the rocker arm shaft is provided with an external spline matched with the internal spline, the external spline comprises a straight spline section and a conical spline section positioned below the straight spline section, the straight spline section is used for being in guide sliding fit with the internal spline in the up-down direction, the reference circle sizes of the conical spline section and the internal spline are gradually increased from top to bottom, and the conical spline section is used for being in rotation stopping fit with the internal spline so as to drive the steering rocker arm to rotate when the rocker arm shaft rotates;

the steering lift system further comprises:

the lifting shifting fork is characterized in that a first end sleeve is arranged outside the rocker shaft, a second end is used for being connected with a lifting power mechanism, an upper pressing plate and a lower supporting plate are arranged at the first end of the lifting shifting fork, through holes for the rocker shaft to penetrate through are respectively formed in the upper pressing plate and the lower supporting plate, the first end of the steering rocker arm is located between the upper pressing plate and the lower supporting plate, the upper pressing plate is used for pressing the steering rocker arm downwards under the action force of the lifting power mechanism, so that an internal spline of the steering rocker arm is matched with a conical spline section in a rotation stopping mode, the lower supporting plate is used for pushing the steering rocker arm upwards under the reaction force of the lifting power mechanism, so that the steering rocker arm, a steering pull rod and a wheel knuckle arm move upwards, and the folding-up of a wheel assembly is achieved.

The beneficial effects of the above technical scheme are that: the connecting structure on the rocker shaft realizes the transmission of the power of the steering gear, so that the power can be transmitted to the rocker shaft to drive the rocker shaft to rotate; the mounting structures at the upper part and the lower part of the rocker shaft realize that the rocker shaft is rotatably mounted on the frame, and the rotating effect of the rocker shaft is ensured; the first end of the steering rocker arm is connected with the rocker arm shaft through a spline structure, particularly, an internal spline is arranged on the steering rocker arm, an external spline matched with the internal spline is arranged on the rocker arm shaft, the external spline comprises a straight spline section and a conical spline section, and the straight spline section is used for being in guiding sliding fit with the internal spline in the vertical direction, so that the steering rocker arm can move up and down, and a wheel assembly can be conveniently folded and lowered; the reference circle size of awl spline section and internal spline all increases from top to bottom gradually, and awl spline section is used for stopping the cooperation of changeing with the internal spline, can make the rocking arm axle drive when rotating to turn to the rocking arm rotatory, and then drives steering linkage, wheel knuckle arm and wheel assembly and rotate, realizes the function that turns to.

The steering lifting system further comprises a lifting shifting fork, an upper pressing plate and a lower supporting plate are arranged at the first end of the lifting shifting fork, the second end of the lifting shifting fork is used for being connected with a lifting power mechanism, and the first end of the steering rocker arm is located between the upper pressing plate and the lower supporting plate, so that the upper pressing plate can downwards press the steering rocker arm under the action force of the lifting power mechanism, an internal spline of the steering rocker arm is in rotation-stopping fit with a conical spline section, and the internal spline and the conical spline section are tightly attached under pressure at the moment, so that the fit between the internal spline and the conical spline section is very tight, a fit gap does not exist, the problems that tires swing irregularly and vehicles cannot realize high-speed land running in the prior art are solved, the linear running stability and the operating stability of the vehicles are improved, and the safety is improved.

In addition, under the reaction force of the lifting power mechanism, the lower supporting plate can upwards push the steering rocker arm, at the moment, the inner spline and the straight spline section are in guiding sliding fit, the steering rocker arm, the steering pull rod and the wheel steering knuckle arm move upwards, and the folding function of the wheel assembly is achieved.

Furthermore, an elastic part is arranged between the upper pressure plate and the first end of the steering rocker arm.

The beneficial effects of the above technical scheme are that: the elastic piece is arranged to conveniently control the pressing position of the upper pressing plate, a certain buffering effect is achieved, and the inner spline and the conical spline section are tightly attached.

Further, a gasket is arranged between the elastic element and the first end of the steering rocker arm.

The beneficial effects of the above technical scheme are that: the rotating friction force is reduced, and the steering rocker arm is convenient to rotate.

Furthermore, the upper end face of the first end of the steering rocker arm is provided with a mounting groove for mounting a gasket.

The beneficial effects of the above technical scheme are that: the installation and the use of gasket are convenient.

Furthermore, the upper pressure plate and the lower supporting plate are both circular plates, and an arc-shaped connecting plate is connected between the upper pressure plate and the lower supporting plate, so that an opening for the first end of the steering rocker arm to be installed is formed between the upper pressure plate and the lower supporting plate.

The beneficial effects of the above technical scheme are that: simple structure, convenient manufacturing, and the installation of the first end of the steering rocker arm of convenience.

Furthermore, promote the shift fork and still include the sleeve of connecting in the bottom plate below and the linking arm that one end is connected on the sleeve peripheral face, the linking arm level extension just is located the below that turns to the rocking arm, and the other one end of linking arm constitutes the second end that promotes the shift fork.

The beneficial effects of the above technical scheme are that: simple structure conveniently promotes the shift fork and promotes being connected between the power unit.

Furthermore, the other end of linking arm is fixed with the riser, be provided with on the riser be used for with promote power unit fixed connection's fixed orifices, the riser is located the second end place of steering rocker and rotates the outside of circumference.

The beneficial effects of the above technical scheme are that: set up the riser and make things convenient for being connected between linking arm and the promotion power unit, the riser is located the outside, avoids riser and the second end of turning to the rocking arm to take place to interfere.

Further, the mounting structure on rocking arm axle upper portion includes support seat and the upper end cover with last support seat fixed connection, the rocking arm axle is including the optical axis section that is located the external splines top, go up support seat and upper end cover and establish the outside at the optical axis section, be provided with on the outer peripheral face of optical axis section and be located between support seat and the upper end cover in order to restrict the limit structure that support seat and upper end cover reciprocated, be provided with on the upper support seat be used for with the frame on the upper bracket fixed connection's that links firmly last connecting hole.

The beneficial effects of the above technical scheme are that: the rocker arm shaft is convenient to install and install, is convenient to connect with a frame, and avoids the rocker arm shaft from moving up and down.

Furthermore, the limiting structure is a limiting ring fixed on the optical axis section through a fixing screw, and the axis of the fixing screw extends along the radial direction of the optical axis section.

The beneficial effects of the above technical scheme are that: the limiting structure is simple and convenient to manufacture and install.

In order to achieve the purpose, the special vehicle adopts the following technical scheme:

a special vehicle comprises a frame and a steering lifting system arranged on the frame, wherein the steering lifting system comprises:

the upper end of the rocker arm shaft is provided with a connecting structure for being in transmission connection with a steering gear, and the upper part and the lower part of the rocker arm shaft are respectively provided with a mounting structure for rotatably mounting the rocker arm shaft on a frame;

the first end of the steering rocker is connected with the rocker shaft through a spline structure, and the second end of the steering rocker is used for being connected with a steering pull rod arranged on a wheel knuckle arm;

the steering rocker arm is provided with an internal spline, the rocker arm shaft is provided with an external spline matched with the internal spline, the external spline comprises a straight spline section and a conical spline section positioned below the straight spline section, the straight spline section is used for being in guide sliding fit with the internal spline in the up-down direction, the reference circle sizes of the conical spline section and the internal spline are gradually increased from top to bottom, and the conical spline section is used for being in rotation stopping fit with the internal spline so as to drive the steering rocker arm to rotate when the rocker arm shaft rotates;

the steering lift system further comprises:

the lifting shifting fork is characterized in that a first end sleeve is arranged outside the rocker shaft, a second end is used for being connected with a lifting power mechanism, an upper pressing plate and a lower supporting plate are arranged at the first end of the lifting shifting fork, through holes for the rocker shaft to penetrate through are respectively formed in the upper pressing plate and the lower supporting plate, the first end of the steering rocker arm is located between the upper pressing plate and the lower supporting plate, the upper pressing plate is used for pressing the steering rocker arm downwards under the action force of the lifting power mechanism, so that an internal spline of the steering rocker arm is matched with a conical spline section in a rotation stopping mode, the lower supporting plate is used for pushing the steering rocker arm upwards under the reaction force of the lifting power mechanism, so that the steering rocker arm, a steering pull rod and a wheel knuckle arm move upwards, and the folding-up of a wheel assembly is achieved.

The beneficial effects of the above technical scheme are that: the connecting structure on the rocker shaft realizes the transmission of the power of the steering gear, so that the power can be transmitted to the rocker shaft to drive the rocker shaft to rotate; the mounting structures at the upper part and the lower part of the rocker shaft realize that the rocker shaft is rotatably mounted on the frame, and the rotating effect of the rocker shaft is ensured; the first end of the steering rocker arm is connected with the rocker arm shaft through a spline structure, particularly, an internal spline is arranged on the steering rocker arm, an external spline matched with the internal spline is arranged on the rocker arm shaft, the external spline comprises a straight spline section and a conical spline section, and the straight spline section is used for being in guiding sliding fit with the internal spline in the vertical direction, so that the steering rocker arm can move up and down, and a wheel assembly can be conveniently folded and lowered; the reference circle size of awl spline section and internal spline all increases from top to bottom gradually, and awl spline section is used for stopping the cooperation of changeing with the internal spline, can make the rocking arm axle drive when rotating to turn to the rocking arm rotatory, and then drives steering linkage, wheel knuckle arm and wheel assembly and rotate, realizes the function that turns to.

The steering lifting system further comprises a lifting shifting fork, an upper pressing plate and a lower supporting plate are arranged at the first end of the lifting shifting fork, the second end of the lifting shifting fork is used for being connected with a lifting power mechanism, and the first end of the steering rocker arm is located between the upper pressing plate and the lower supporting plate, so that the upper pressing plate can downwards press the steering rocker arm under the action force of the lifting power mechanism, an internal spline of the steering rocker arm is in rotation-stopping fit with a conical spline section, and the internal spline and the conical spline section are tightly attached under pressure at the moment, so that the fit between the internal spline and the conical spline section is very tight, a fit gap does not exist, the problems that tires swing irregularly and vehicles cannot realize high-speed land running in the prior art are solved, the linear running stability and the operating stability of the vehicles are improved, and the safety is improved.

In addition, under the reaction force of the lifting power mechanism, the lower supporting plate can upwards push the steering rocker arm, at the moment, the inner spline and the straight spline section are in guiding sliding fit, the steering rocker arm, the steering pull rod and the wheel steering knuckle arm move upwards, and the folding function of the wheel assembly is achieved.

Furthermore, an elastic part is arranged between the upper pressure plate and the first end of the steering rocker arm.

The beneficial effects of the above technical scheme are that: the elastic piece is arranged to conveniently control the pressing position of the upper pressing plate, a certain buffering effect is achieved, and the inner spline and the conical spline section are tightly attached.

Further, a gasket is arranged between the elastic element and the first end of the steering rocker arm.

The beneficial effects of the above technical scheme are that: the rotating friction force is reduced, and the steering rocker arm is convenient to rotate.

Furthermore, the upper end face of the first end of the steering rocker arm is provided with a mounting groove for mounting a gasket.

The beneficial effects of the above technical scheme are that: the installation and the use of gasket are convenient.

Furthermore, the upper pressure plate and the lower supporting plate are both circular plates, and an arc-shaped connecting plate is connected between the upper pressure plate and the lower supporting plate, so that an opening for the first end of the steering rocker arm to be installed is formed between the upper pressure plate and the lower supporting plate.

The beneficial effects of the above technical scheme are that: simple structure, convenient manufacturing, and the installation of the first end of the steering rocker arm of convenience.

Furthermore, promote the shift fork and still include the sleeve of connecting in the bottom plate below and the linking arm that one end is connected on the sleeve peripheral face, the linking arm level extension just is located the below that turns to the rocking arm, and the other one end of linking arm constitutes the second end that promotes the shift fork.

The beneficial effects of the above technical scheme are that: simple structure conveniently promotes the shift fork and promotes being connected between the power unit.

Furthermore, the other end of linking arm is fixed with the riser, be provided with on the riser be used for with promote power unit fixed connection's fixed orifices, the riser is located the second end place of steering rocker and rotates the outside of circumference.

The beneficial effects of the above technical scheme are that: set up the riser and make things convenient for being connected between linking arm and the promotion power unit, the riser is located the outside, avoids riser and the second end of turning to the rocking arm to take place to interfere.

Further, the mounting structure on rocking arm axle upper portion includes support seat and the upper end cover with last support seat fixed connection, the rocking arm axle is including the optical axis section that is located the external splines top, go up support seat and upper end cover and establish the outside at the optical axis section, be provided with on the outer peripheral face of optical axis section and be located between support seat and the upper end cover in order to restrict the limit structure that support seat and upper end cover reciprocated, be provided with on the upper support seat be used for with the frame on the upper bracket fixed connection's that links firmly last connecting hole.

The beneficial effects of the above technical scheme are that: the rocker arm shaft is convenient to install and install, is convenient to connect with a frame, and avoids the rocker arm shaft from moving up and down.

Furthermore, the limiting structure is a limiting ring fixed on the optical axis section through a fixing screw, and the axis of the fixing screw extends along the radial direction of the optical axis section.

The beneficial effects of the above technical scheme are that: the limiting structure is simple and convenient to manufacture and install.

Drawings

FIG. 1 is a partial perspective view of a steering lift system of the present invention;

FIG. 2 is a partial front view of the steering lift system of the present invention;

FIG. 3 is a partial cutaway view of the steer lift system of the present invention (with the wheel assembly in a lowered position);

FIG. 4 is an enlarged view of the lower portion of FIG. 3;

FIG. 5 is an enlarged view of the upper portion of FIG. 3;

FIG. 6 is a partial cutaway view of the steer lift system of the present invention (with the wheel assembly in a stowed condition);

fig. 7 is a partially enlarged view of fig. 6.

In the figure: 1. a rocker shaft body; 1-1, straight spline section; 1-2, a conical spline section; 1-3, optical axis segment; 1-4, a connecting segment; 2. a support bar; 3. locking the nut; 4. a steering rocker arm; 5. lifting the shifting fork; 5-1, an upper pressing plate; 5-2, a lower supporting plate; 5-3, connecting plates; 5-4, sleeve; 5-5, connecting arm; 5-6, vertical plate; 6. a rubber ring; 7. a first gasket; 8. a second gasket; 9. an upper support base; 9-1, connecting holes; 10. an upper end cover; 11. a first set screw; 12. a limiting ring; 13. a second set screw; 14. a bushing; 15. a third gasket; 16. an upper bracket; 17. a lower support seat; 18. a lower bracket; 19. a steering tie rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

An embodiment of the steering lifting system of the present invention is shown in fig. 1 and 2, which show a half structure of the steering lifting system, and the steering lifting system is configured to steer and lift the left and right wheels, and thus is configured by the structures shown in the two figures in a left-right symmetrical arrangement.

Specifically, the steering lifting system comprises a vertically arranged rocker shaft, the rocker shaft in the embodiment is in an assembly form, and as shown in fig. 3, the steering lifting system comprises a rocker shaft body 1 and a support rod 2, a threaded hole is formed in the lower end of the rocker shaft body 1, a screw rod is arranged on the upper portion of the support rod 2, a polished rod is arranged on the lower portion of the support rod, the screw rod is connected with the threaded hole, the overall height of the rocker shaft can be adjusted, and a locking nut 3 is connected to the screw rod.

The upper end of the rocker shaft body 1 is provided with a connecting structure, namely connecting sections 1-4, for transmission connection with a steering gear, and the connecting sections 1-4 in the embodiment are spline sections, so that the power of the steering gear is conveniently transmitted to the rocker shaft to drive the rocker shaft to rotate. In order to ensure the rotating effect of the rocker shaft, the upper part and the lower part of the rocker shaft are respectively provided with a mounting structure for rotatably mounting the rocker shaft on the frame, as shown in fig. 3 and 5, the mounting structure on the upper part of the rocker shaft comprises an upper support seat 9 and an upper end cover 10 fixedly connected with the upper support seat 9 through a first fixing screw 11, the rocker shaft body 1 comprises an optical shaft section 1-3 positioned below the connecting section 1-4, the upper support seat 9 and the upper end cover 10 are sleeved outside the optical shaft section 1-3, the upper support seat 9 is provided with an upper connecting hole 9-1 fixedly connected with an upper bracket 16 (shown in fig. 1 and 2) fixedly connected with the frame, and the upper bracket 16 is a U-shaped bent piece.

The outer peripheral surface of the optical axis segment 1-3 is provided with a limiting structure located between the upper supporting seat 9 and the upper end cap 10 to limit the upper supporting seat 9 and the upper end cap 10 from moving up and down, as shown in fig. 5, the limiting structure in this embodiment is a limiting ring 12 fixed on the optical axis segment 1-3 by a second fixing screw 13, and the axis of the second fixing screw 13 extends along the radial direction of the optical axis segment 1-3. A lining 14 is arranged in an inner hole of the upper supporting seat 9, the optical axis sections 1-3 are in rotating sliding fit with the lining 14, an outward turning edge is arranged at the upper end of the lining 14, and the lower end surface of the limiting ring 12 is in contact with the outward turning edge. A third gasket 15 is arranged between the limiting ring 12 and the upper end cover 10, and the upper end surface of the limiting ring 12 is in contact with the third gasket 15, so that when the rocker shaft rotates under the power action of the steering gear, the optical shaft sections 1-3 rotate relative to the bushing 14, the limiting ring 12 rotates synchronously with the optical shaft sections 1-3, and the limiting ring 12 is in contact with the third gasket 15 and the outward turning edge, so that the rotation resistance can be reduced.

As shown in fig. 1 and 2, the mounting structure at the lower part of the rocker shaft comprises a lower support seat 17, an insertion hole with an upward opening is formed in the lower support seat 17, and a polish rod at the lower part of the support rod 2 is inserted into the insertion hole and is in rotating fit with the lower support seat 17. During installation, the lower support seat 17 penetrates through the lower support 18, the lower support 18 is an L-shaped bending piece, a flange of the lower support seat 17 is located below the transverse edge of the lower support 18 and is fixedly connected with the transverse edge of the lower support 18 through bolts and nuts, and the vertical edge of the lower support 18 is fixedly connected with a frame.

As shown in fig. 1, 2, 3, 4, 6 and 7, the steering lift system further includes a steering rocker arm 4, a first end of the steering rocker arm 4 is connected with the rocker shaft body 1 through a spline structure, a second end of the steering rocker arm is used for being connected with a steering tie rod 19 mounted on a wheel knuckle arm (not shown), and a first end of the steering rocker arm 4 is provided with an internal spline.

The rocker shaft body 1 is provided with an external spline which is matched with an internal spline on the steering rocker arm 4, as shown in fig. 3 and 6, the external spline comprises a straight spline section 1-1 and a conical spline section 1-2 which is positioned below the straight spline section 1-1, the straight spline section 1-1 is positioned below the optical shaft section 1-3 and is used for being in guiding sliding fit with the internal spline in the up-and-down direction (as shown in fig. 6), the up-and-down movement of the steering rocker arm 4 can be realized, and the folding and the lowering of the wheel assembly are convenient. The upper part of the conical spline section 1-2 is consistent with the size of the straight spline section 1-1, the reference circle sizes of the conical spline section 1-2 and the internal spline are gradually increased from top to bottom, and the conical spline section 1-2 is used for being in rotation stopping fit with the internal spline (as shown in figure 3) so that the rocker shaft body 1 drives the steering rocker arm 4 to rotate when rotating, and further drives the steering pull rod 19, the wheel knuckle arm and the wheel assembly to rotate, and the steering function is realized.

As shown in fig. 1, 2, 3, 4, 6, and 7, the steering lift system further includes a lifting fork 5, a first end of the lifting fork 5 is sleeved outside the rocker shaft body 1, and a second end of the lifting fork 5 is used for connecting with a lifting power mechanism (not shown). An upper pressing plate 5-1 and a lower supporting plate 5-2 are arranged at the first end of the lifting shifting fork 5, through holes for the rocker shaft body 1 to penetrate through are respectively arranged on the upper pressing plate 5-1 and the lower supporting plate 5-2, and the first end of the steering rocker arm 4 is positioned between the upper pressing plate 5-1 and the lower supporting plate 5-2. Specifically, the upper pressure plate 5-1 and the lower supporting plate 5-2 are both circular plates, and a semicircular arc-shaped connecting plate 5-3 is connected between the upper pressure plate 5-1 and the lower supporting plate 5-2, so that an opening for the first end of the steering rocker arm 4 to be arranged in is formed between the upper pressure plate 5-1 and the lower supporting plate 5-2.

The upper pressure plate 5-1 is used for pressing the steering rocker arm 4 downwards under the action force of the lifting power mechanism so as to enable the internal spline of the steering rocker arm 4 to be in running-stop fit with the conical spline section 1-2 (as shown in figure 3); the lower support plate 5-2 is used for pushing the steering rocker arm 4 upwards under the reaction force of the lifting power mechanism so as to enable the steering rocker arm 4, the steering pull rod 19 and the wheel knuckle arm to move upwards (as shown in fig. 6), and the wheel assembly is folded.

Specifically, the lifting shifting fork 5 further comprises a sleeve 5-4 connected below the lower supporting plate 5-2 and a connecting arm 5-5 with one end connected to the outer peripheral surface of the sleeve 5-4, the connecting arm 5-5 extends horizontally and is located below the steering rocker arm 4, and the other end of the connecting arm 5-5 forms a second end of the lifting shifting fork. As shown in fig. 1, 2, 3 and 6, the other end of the connecting arm 5-5 is fixed with a vertical plate 5-6, the vertical plate 5-6 is provided with a fixing hole for fixedly connecting with a lifting power mechanism, and the vertical plate 5-6 is positioned outside the rotating circumference of the second end of the steering rocker arm 4, so that the interference with the second end of the steering rocker arm 4 can be avoided.

In addition, an elastic member is arranged between the upper pressure plate 5-1 and the first end of the steering rocker arm 4, as shown in fig. 3 and 4, the elastic member in this embodiment is a rubber ring 6, and the rubber ring 6 has a certain deformation compression amount under pressure. In order to reduce the rotational friction and facilitate the rotation of the pitman arm 4, a first gasket 7 is provided between the rubber ring 6 and the first end of the pitman arm 4, and a mounting groove for mounting the first gasket 7 is provided on the upper end surface of the first end of the pitman arm 4. Further, as shown in fig. 4 and 7, a second shim 8 is provided between the first end of the pitman arm 4 and the lower plate 5-2, and a mounting groove for mounting the second shim 8 is provided on the upper end surface of the lower plate 5-2.

The working principle of the steering lifting system is as follows:

when a vehicle runs on land, a wheel assembly is in a downward-placing state, a lifting shifting fork 5 enables an upper pressure plate 5-1 to downwards press a steering rocker arm 4 under the downward acting force of a lifting power mechanism, the steering mechanism is in a lower limit state shown in figure 3, the shapes of the lifting shifting fork 5, the steering rocker arm 4, a rubber ring 6, a first gasket 7 and a second gasket 8 are shown in figure 4, the rubber ring 6 is pressed and deformed, the first end of the steering rocker arm 4 is in contact with the first gasket 7 and has a gap with the second gasket 8, an internal spline of the steering rocker arm 4 is in rotation stop fit with a conical spline section 1-2, due to the conical characteristic of the internal spline and the conical spline section 1-2, under the vertical pressure of the lifting power mechanism and the rubber ring 6, the fit between the two is very tight, no fit gap exists, and the problems that in the prior art, tires swing irregularly and the vehicle cannot run on land are solved, the straight-line running stability and the operation stability of the vehicle are improved, and the safety is improved.

When the steering is needed, the steering power of the steering gear drives the rocker shaft to rotate along the axis of the rocker shaft, and the first gasket 7 is arranged between the steering rocker 4 and the rubber ring 6, so that the rotating resistance can be reduced, and the steering rocker 4, the steering pull rod 19, the wheel knuckle arm and the wheel assembly are driven to rotate, thereby realizing the steering function.

When the vehicle runs in water and needs to be steered and lifted, the lifting shifting fork 5 enables the lower supporting plate 5-2 to upwards push the steering rocker arm 4 under the upward reaction force of the lifting power mechanism, so that the second gasket 8, the first gasket 7, the rubber ring 6, the steering rocker arm 4, the steering pull rod 19 and the wheel knuckle arm are driven to upwards move, and the wheel assembly is folded. In the process, the internal spline of the steering rocker arm 4 is in guide sliding fit with the straight spline section 1-1, as shown in fig. 6 and 7, and a gap is reserved between the rubber ring 6 and the upper pressure plate 5-1, so that the rubber ring 6 is not stressed and is in a normal state.

In other embodiments of the steer lift system: the limiting structure on the outer peripheral surface of the optical axis section can be an annular boss integrally and convexly arranged on the outer peripheral surface of the optical axis section instead of a limiting ring fixed on the optical axis section through a screw.

In other embodiments of the steer lift system: the mounting structure on the upper part of the rocker shaft can be a mounting plate fixed on the rocker shaft, the mounting plate can be provided with a sleeve structure, and the sleeve is fixed on the rocker shaft through a jackscrew, or the mounting plate is not provided with the sleeve structure and is directly welded and fixed on the rocker shaft.

In other embodiments of the steer lift system: according to the concrete form of lifting power mechanism, the other end of linking arm also can fix the diaphragm, through diaphragm and lifting power mechanism fixed connection.

In other embodiments of the steer lift system: the lifting fork may not include a sleeve, and one end of the connecting arm is directly connected to the lower support plate.

In other embodiments of the steer lift system: the upper pressure plate and the lower supporting plate can be not circular plates and can be square, and the connecting plate is a vertical plate at the moment, and a square cavity is formed between the upper pressure plate and the lower supporting plate.

In other embodiments of the steer lift system: the upper end face of the first end of the steering rocker arm is not provided with a mounting groove, and the first gasket is directly contacted with the upper end face.

In other embodiments of the steer lift system: the elastic member may be a spring.

In other embodiments of the steer lift system: no spacer may be provided between the resilient member and the first end of the pitman arm, the pitman arm being in direct contact with the resilient member.

In other embodiments of the steer lift system: an elastic part is not arranged between the upper pressure plate and the first end of the steering rocker arm, and the steering rocker arm is directly contacted with the upper pressure plate.

In other embodiments of the steer lift system: the mounting structure at the lower portion of the rocker shaft may also be a bearing.

In other embodiments of the steer lift system: the connecting structure at the upper end of the rocker shaft can be a square shaft or a square hole instead of a spline section.

The embodiment of the special vehicle in the invention is as follows: the special vehicle comprises a frame and a steering lifting system arranged on the frame, and the specific structure of the steering lifting system is the same as that of the steering lifting system in the embodiment, and the detailed description is omitted.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.