阅读说明：本技术 双前轴转向系统及设有该双前轴转向系统的车辆 (Double-front-axle steering system and vehicle with same ) 是由 殷祥珍 陈广宇 王明明 魏韬 张建振 袁晶 于 2021-07-20 设计创作，主要内容包括：本申请涉及一种双前轴转向系统及设有该双前轴转向系统的车辆,包括转向机、过渡拉杆和转向助力缸、第一转向拉杆和第一轴车轮以及第二转向拉杆和第二轴车轮。其中,过渡拉杆与第二转向拉杆直接与转向助力缸连接,缩短了过渡拉杆的自身长度,提升了过渡拉杆的刚度及寿命；同时去除了现有技术中所采用的过渡摇臂和过渡支架,简化了整个双轴转向系统的杆系数量,提升了传动效率。(The application relates to a double-front-axle steering system and a vehicle with the same. The transition pull rod and the second steering pull rod are directly connected with the steering power cylinder, so that the length of the transition pull rod is shortened, the rigidity of the transition pull rod is improved, and the service life of the transition pull rod is prolonged; meanwhile, transition rocker arms and transition supports adopted in the prior art are eliminated, the number of rod systems of the whole double-shaft steering system is simplified, and the transmission efficiency is improved.)

1. A dual front axle steering system, comprising:

the steering engine is connected with a steering rocker arm capable of rotating around an axis;

the steering system comprises a transition pull rod and a steering power cylinder, wherein the steering power cylinder comprises a piston movably arranged in a cylinder body of the steering power cylinder, one end of the transition pull rod is connected to a steering rocker arm, the other end of the transition pull rod is connected to the first end of the piston, and the steering rocker arm can drive the transition pull rod to act when rotating so as to drive the piston in the steering power cylinder to do reciprocating motion;

one end of the first steering pull rod is connected to the steering rocker arm, and the other end of the first steering pull rod is connected to the first axle wheel;

one end of the second steering pull rod is connected with the second end of the piston of the steering power cylinder, and the other end of the second steering pull rod is connected with the second axle wheel;

when the steering rocker arm rotates, the first steering pull rod can be driven to act, the piston of the power steering cylinder reciprocates to drive the second steering pull rod to act, and the first steering pull rod and the second steering pull rod can drive the first axle wheel and the second axle wheel to synchronously steer.

2. The dual front axle steering system of claim 1, wherein the piston within the cylinder body of the cylinder has the first and second ends opposite each other and perpendicular to the axis of the steering cylinder;

the area of the end face of the first end is equal to the area of the end face of the second end.

3. The dual front axle steering system of claim 2, wherein the cylinder further comprises a first piston rod and a second piston rod connected to the piston;

the first piston rod is connected to the first end of the piston, and the other end of the first piston rod is connected to the transition pull rod;

the second piston rod is connected to the second end of the piston, and the other end of the second piston rod is connected to the second steering pull rod;

wherein the first piston rod and the second piston rod have the same cross-sectional area.

4. A dual front axle steering system according to claim 3, wherein the first piston rod extends out of the steering cylinder and is provided with a first connection at an end remote from the piston; the transition pull rod is connected with the first piston rod through the first connecting part.

5. The dual front axle steering system according to claim 4, wherein the second piston rod extends out of the steering cylinder and has a second connection at an end remote from the piston; the second steering pull rod is connected with the second piston rod through the second connecting portion.

6. The dual front axle steering system of claim 5, further comprising a plurality of bulbs;

the steering rocker arm is connected with the first steering pull rod through the ball head;

the transition pull rod is connected to the first connecting part through the ball head;

the second piston rod is connected to the second connecting portion through the ball head, so that the first axle wheel and the second axle wheel are driven to steer synchronously when the steering rocker arm rotates.

7. The dual front axle steering system of claim 6, wherein a first attachment is provided on the steering cylinder, the steering cylinder being secured to the dual front axle steering system by the first attachment.

8. A dual front axle steering system according to claim 1 or 7, further comprising a cylinder mount by which the steering cylinder is secured to the vehicle chassis.

9. The dual front axle steering system of claim 8, wherein the cylinder mount includes a second attachment portion coupled to a vehicle chassis and a third attachment portion coupled to the first attachment portion of the steering cylinder.

10. A vehicle comprising a dual front axle steering system according to any of claims 1-9, said vehicle comprising a frame, said dual front axle steering system being mounted to said frame.

Technical Field

The application relates to the technical field of steering systems of heavy trucks, in particular to a double-front-axle steering system and a vehicle with the same.

Background

With the development of the steering system technology of the heavy-duty truck, a double front axle steering system technology appears. In the prior art, a double-front-axle steering system adopts a transition rocker arm and a transition rocker arm bracket as a transition component between a steering power cylinder and a steering transition rod. However, the whole double front axle steering system has more linkages and has the problems of longer transition rod, low transmission efficiency, easy bending of the transition rod and the like.

Disclosure of Invention

Based on this, it is necessary to solve the problems of long transition rod, low transmission efficiency, and easy bending of the transition rod in the conventional dual front axle steering system. A dual front axle steering system and a vehicle provided with the same are provided.

A dual front axle steering system, comprising:

the steering engine is connected with a steering rocker arm capable of rotating around an axis;

the steering system comprises a transition pull rod and a steering power cylinder, wherein the steering power cylinder comprises a piston movably arranged in a cylinder body of the steering power cylinder, one end of the transition pull rod is connected to a steering rocker arm, the other end of the transition pull rod is connected to the first end of the piston, and the steering rocker arm can drive the transition pull rod to act when rotating so as to drive the piston in the steering power cylinder to do reciprocating motion;

one end of the first steering pull rod is connected to the steering rocker arm, and the other end of the first steering pull rod is connected to the first axle wheel;

one end of the second steering pull rod is connected with the second end of the piston of the steering power cylinder, and the other end of the second steering pull rod is connected with the second axle wheel;

when the steering rocker arm rotates, the first steering pull rod can be driven to act, the piston of the power steering cylinder reciprocates to drive the second steering pull rod to act, and the first steering pull rod and the second steering pull rod can drive the first axle wheel and the second axle wheel to synchronously steer.

In one embodiment, the piston in the cylinder body of the cylinder has the first end and the second end opposite to each other and perpendicular to the axis of the steering cylinder;

the area of the end face of the first end is equal to the area of the end face of the second end.

In one embodiment, the cylinder further comprises a first piston rod and a second piston rod connected to the piston;

the first piston rod is connected to the first end of the piston, and the other end of the first piston rod is connected to the transition pull rod;

the second piston rod is connected to the second end of the piston, and the other end of the second piston rod is connected to the second steering pull rod;

wherein the first piston rod and the second piston rod have the same cross-sectional area.

In one embodiment, the end of the first piston rod extending out of the steering cylinder and away from the piston is provided with a first connecting part; the transition pull rod is connected with the first piston rod through the first connecting part.

In one embodiment, the end of the second piston rod extending out of the steering cylinder and away from the piston is provided with a second connecting part; the second steering pull rod is connected with the second piston rod through the second connecting portion.

In one embodiment, the dual front axle steering system further comprises a plurality of bulbs;

the steering rocker arm is connected with the first steering pull rod through the ball head;

the transition pull rod is connected to the first connecting part through the ball head;

the second piston rod is connected to the second connecting portion through the ball head, so that the first axle wheel and the second axle wheel are driven to steer synchronously when the steering rocker arm rotates.

In one embodiment, a first fixing portion is provided on the steering cylinder, and the steering cylinder is fixed to the dual front axle steering system through the first fixing portion.

In one embodiment, the dual front axle steering system further comprises a cylinder mount, and the steering cylinder is fixed on the vehicle chassis through the cylinder mount.

In one embodiment, the cylinder mount includes a second fixing portion connected to a vehicle chassis and a third fixing portion connected to the first fixing portion of the steering cylinder.

A vehicle comprising a dual front axle steering system according to any of claims 1-9, said vehicle comprising a frame, said dual front axle steering system being mounted to said frame.

The double-front-shaft steering system and the vehicle with the same comprise a steering engine, a steering rocker arm fixed on the steering engine, a transition pull rod, a first steering pull rod, a second steering pull rod, a first axle wheel and a second axle wheel. The transition pull rod and the second steering pull rod are directly connected with the steering power cylinder, so that the length of the transition pull rod is shortened, and the service life of the transition pull rod is prolonged; meanwhile, transition rocker arms and transition supports adopted in the prior art are eliminated, the number of rod systems of the whole double-shaft steering system is simplified, and the transmission efficiency is improved.

Drawings

FIG. 1 is an elevation view of a dual front axle steering system in an embodiment of the present application;

FIG. 2 is a top view of a dual front axle steering system according to an embodiment of the present application;

FIG. 3 is a first schematic illustration of a first rotary power cylinder of a dual front axle steering system in accordance with an embodiment of the present application;

FIG. 4 is a second schematic illustration of a rotary power cylinder of a dual front axle steering system in an embodiment of the present application;

FIG. 5 is a schematic diagram of a fixed bracket structure of a power cylinder of a dual front axle steering system according to an embodiment of the present disclosure.

The steering system comprises a steering engine 1, a steering rocker arm 11, a transition pull rod 2, a steering cylinder 3, a piston 31, a first piston rod 32, a first connecting part 321, a second piston rod 33, a second connecting part 331, a first fixing part 34, a first steering pull rod 41, a second steering pull rod 42, a first axle wheel 51, a second axle wheel 52, a ball head 6, a cylinder fixing frame 7, a second fixing part 71, a third fixing part 72, a frame 8, a steering oil tank 91, a steering pump 92 and an oil pipe 93.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As described in the background, prior art dual front axle steering systems employ a transition rocker arm and a transition rocker arm bracket as the transition assembly between the steering cylinder and the steering transition rod. However, the whole double front axle steering system has more linkages and has the problems of longer transition rod, low transmission efficiency, easy bending of the transition rod and the like.

Therefore, it is necessary to solve the problems of the conventional dual front axle steering system, such as long transition rod, low transmission efficiency, and flexible transition rod. A dual front axle steering system and a vehicle provided with the same are provided.

Fig. 1 illustrates a front view of a dual front axle steering system in an embodiment of the present application, and fig. 2 illustrates a top view of the dual front axle steering system in an embodiment of the present application.

Referring to fig. 1 and 2, an embodiment of the present application provides a dual front axle steering system including a steering gear 1, a transition link 2 and a steering cylinder 3, a first steering link 41 and first axle wheels 51, and a second steering link 42 and second axle wheels 52.

The steering engine 1 is connected with a steering rocker 11 capable of rotating around an axis, the steering cylinder 3 comprises a piston 31 movably arranged in a cylinder body of the steering cylinder 3, one end of a transition pull rod 2 is connected with the steering rocker 11, the other end of the transition pull rod 2 is connected with a first end of the piston 31, the steering rocker 11 can drive the transition pull rod 2 to move when rotating, so as to drive the piston 31 in the steering cylinder 3 to reciprocate, one end of a first steering pull rod 41 is connected with the steering rocker 11, the other end of the first steering pull rod 41 is connected with a first axle wheel 51, one end of a second steering pull rod 42 is connected with a second end of the piston 31 of the steering cylinder 3, and the other end of the second steering pull rod 42 is connected with a second axle wheel 52.

As a preferred embodiment of the application, the steering engine 1 is connected with the steering rocker arm 11 through a spline, three holes are formed in the steering rocker arm 11, the upper end hole of the steering rocker arm is connected with the steering engine 1, the middle hole of the steering rocker arm 11 is connected with the transition pull rod 2, and the lower end hole of the steering rocker arm 11 is connected with the first steering pull rod 41.

When the steering rocker arm 11 rotates, the first steering linkage 41 can be driven to act, the piston 31 of the steering cylinder 3 reciprocates to drive the second steering linkage 42 to act, and the first steering linkage 41 and the second steering linkage 42 can drive the first axle wheel 51 and the second axle wheel 52 to synchronously steer.

Preferably, in an embodiment of the present application, the pitman arm 11 is fixed to the steering gear 1 through an upper end hole by a spline connection, the pitman arm 11 is fixed to the transition rod 2 through a middle hole by a ball joint connection, and the pitman arm 11 is fixed to the first steering rod 41 through a lower end hole by a ball joint connection.

Specifically, for the first axle wheel 51, when the steering gear 1 rotates, the steering gear 1 drives the steering rocker 11 to rotate, the steering rocker 11 drives the first steering pull rod 41 to move, and the first steering pull rod 41 drives the first axle wheel 51 to rotate, so that the steering action of the first axle wheel 51 is completed.

Further, for the second axle wheel 52, when the steering gear 1 rotates, the steering gear 1 drives the steering rocker 11 to rotate, the steering rocker 11 drives the steering rod to move, the steering rod drives the piston 31 in the steering cylinder 3 to reciprocate, the steering cylinder 3 drives the second steering rod 42 to move, the second steering rod 42 drives the second axle wheel 52 to rotate, and thus the steering action of the second axle wheel 52 is completed.

That is, the transition pull rod 2 and the steering cylinder 3 are added between the second axle wheel 52 and the steering arm 11, so that the whole first axle wheel 51 and the whole second axle wheel 52 rotate synchronously after the steering gear 1 drives the steering arm 11 to rotate. The transmission structure of the whole double-front-axle steering system only comprises a first axle wheel 51, a second axle wheel 52, the steering engine 1, the steering rocker arm 11, the first steering pull rod 41, the second steering pull rod 42, the steering cylinder 3 and the piston 31, and compared with the number of rod pieces in the prior art, the number of rod pieces of the whole transmission structure is greatly reduced, and the transmission efficiency is improved.

FIG. 3 is a first schematic diagram of a first rotary power cylinder of a dual front axle steering system according to an embodiment of the present disclosure.

Referring to fig. 3, in an embodiment of the present application, the piston 31 in the cylinder body of the power cylinder has a first end and a second end opposite to each other and perpendicular to the axis of the steering cylinder 3, and the end surface area of the first end is equal to the end surface area of the second end. Specifically, the equal end surface areas of the first end and the second end ensure that the contact area of the cylinder piston 31 and the oil in the cylinder is equal in two reciprocating processes in the cylinder, so as to ensure that the stroke working conditions of the two pistons 31 are the same.

Further, in an embodiment of the present application, the power cylinder further includes a first piston rod 32 and a second piston rod 33 connected to the piston 31, the first piston rod 32 is connected to a first end of the piston 31, the other end of the first piston rod is connected to the transition link 2, the second piston rod 33 is connected to a second end of the piston 31, and the other end of the second piston rod is connected to the second steering link 42, so that when the transition link 2 rotates on the steering rocker arm 11, the piston 31 can be driven to reciprocate, the second steering link 42 is driven to move, and the steering of the second axle wheel 52 is achieved.

In some embodiments of the present application, the cross-sectional areas of the first piston rod 32 and the second piston rod 33 are equal to each other, so as to ensure that the vertical contact area of the piston 31 with the oil is equal when the piston 31 moves to the left or the right relative to the axis of the steering cylinder 3. The stress area of the piston 31 is the same when the driver controls the vehicle to turn left or turn right, therefore, the stress condition is the same when the piston 31 moves left or right, so that the force applied to the steering wheel by the driver is kept consistent when the vehicle turns left or right, the driving comfort of the driver is improved, and the problem that the driving comfort of the driver is affected due to the fact that the stress area of the piston is inconsistent in the reciprocating process of the piston by the aid of the power steering cylinder with a single piston rod in the prior art is solved.

In an embodiment of the present application, the dual front axle steering system further includes a power transmission system, the power transmission system includes a steering oil tank 91, a steering pump 92, a plurality of oil pipes 93, a steering engine 1 and a steering power cylinder 3, the steering engine 1 is provided with an oil delivery port and an oil return port, and the steering power cylinder 3 is provided with an oil inlet and an oil outlet.

The steering oil tank 91 provides hydraulic oil for the steering pump 92, when the steering pump 92 works, the steering pump 92 sends the high-pressure oil into the steering engine 1, an oil delivery port on the steering engine 1 sends the high-pressure oil into an oil inlet of the steering power cylinder 3 through an oil delivery pipe 93, an oil return port on the steering engine 1 sends the oil back to the steering engine 1 through the oil delivery pipe 93, and the oil return port of the steering engine 1 sends the oil back to the steering oil tank 91 to form a complete hydraulic oil circulation. The whole oil liquid circulation process drives the piston 31 in the power steering cylinder 3 to reciprocate, power is provided for the second steering pull rod 42 to assist, and then the second shaft vehicle is driven to rotate. The power-assisted steering of the second axle wheels 52 is realized through the flow of the hydraulic oil, and the first axle wheels 51 and the second axle wheels 52 can be synchronously steered after the steering machine rotates.

FIG. 4 is a second schematic diagram of a rotary power cylinder of a dual front axle steering system according to an embodiment of the present application.

Referring to fig. 4, in an embodiment of the present application, the first piston rod 32 extends out of the steering cylinder 3 and has a first connection portion 321 at an end away from the piston 31, and the transition link 2 is connected to the first piston rod 32 through the first connection portion 321. Specifically, the first connection portion 321 is an internal thread provided on the first piston rod 32, and the transition pull rod 2 is connected to the first piston rod 32 through the thread.

In an embodiment of the present application, the end of the second piston rod 33 extending out of the steering cylinder 3 and away from the piston 31 is provided with a second connecting portion 331, and the second steering linkage 42 is connected to the second piston rod 33 through the second connecting portion 331. Specifically, the second connecting portion 331 is an internal thread provided on the second piston rod 33, and the second steering link 42 is threadedly connected to the second piston rod.

FIG. 5 is a schematic diagram of a fixed bracket structure of a power cylinder of a dual front axle steering system according to an embodiment of the present disclosure.

Further, referring to fig. 5, in some embodiments of the present application, the dual front axle steering system further comprises a plurality of bulbs 6. The steering rocker arm 11 is connected with the first steering pull rod 41 through the ball head 6, the transition pull rod 2 is connected with the first connecting portion 321 through the ball head 6, and the second piston rod 33 is connected with the second connecting portion 331 through the ball head 6, so that the first axle wheel 51 and the second axle wheel 52 are driven to synchronously steer when the steering rocker arm 11 rotates.

In an embodiment of the present application, the steering rocker 11 is connected to a steering wheel of the vehicle through a pull rod, and rotation of the steering wheel can drive the steering rocker to rotate, so as to drive the first axle wheels 51 and the second axle wheels 52 to steer synchronously.

Specifically, one end of the ball head 6 is provided with an external thread, and the ball head 6 is connected with the first piston rod 32 and the second piston rod 33 through threads. Therefore, it is ensured that the first piston rod 32 and the second piston rod 33 can displace in different directions to adapt to the rotation action of the steering rocker arm 11, so as to drive the first axle wheel 51 and the second axle vehicle 52 to steer synchronously.

That is, the ball 6 is used to connect the steering rocker arm 11 and the first steering tie rod 41, the transition tie rod 2 and the first piston rod 32, and the second steering tie rod 42 and the second piston rod 33, so that the transition tie rod 2, the steering cylinder 3, and the first steering tie rod 41 and the second steering tie rod 42 can perform actions in the space where they are located in response to the rotating actions of the steering rocker arm 11, thereby achieving steering of the first steering shaft and the second steering shaft.

In some embodiments of the present application, a first fixing portion 34 is further disposed on the steering cylinder 3, and the steering cylinder 3 is fixed to the dual front axle steering system by the first fixing portion 34. Preferably, the first fixing portion 34 is a snap groove provided on the steering cylinder 3, and the snap groove cooperates with the belt to fix the steering cylinder to the dual front axle steering system, thereby preventing the front and rear movement of the cylinder body relative to the dual front axle steering system.

In some embodiments, the dual front axle steering system further comprises a cylinder mount 7, and the steering cylinder 3 is fixed to the vehicle chassis by the cylinder mount 7.

Specifically, in some embodiments of the present application, the cylinder mount 7 includes a second fixing portion 71 and a third fixing portion 72, the second fixing portion 71 is connected to the vehicle chassis, and the third fixing portion 72 is connected to the first fixing portion 34 of the steering cylinder 3. Preferably, the second fixing portion 71 and the third fixing portion 72 include, but are not limited to, mounting holes opened on the cylinder holder 7 to fix the steering cylinder 3 with the entire dual front axle steering system through the cylinder holder 7.

Specifically, the second fixing portion 71 and the third fixing portion 72 are uniformly arranged on the cylinder fixing frame 7, and after the cylinder fixing frame 7 is installed, the cylinder fixing frame 7 is inclined relative to the horizontal ground, so that the occupied space outside the frame 8 is reduced, the installation space of other structures is provided for the whole vehicle, and the space utilization rate of the chassis is improved.

In one embodiment of the present application, the present application further includes a vehicle, wherein the vehicle includes a dual front axle steering system and a frame 8, and the dual front axle steering system is mounted on the frame 8 to realize steering control of the whole vehicle.

In one embodiment of the present application, after the dual front axle steering system is installed, the steering cylinder 3, the transition link 2, the first steering link 41, the second steering link 42, and the cylinder bracket 7 are not parallel to the frame. And further more space of the vehicle chassis can be saved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.