CN112895806A

CN112895806A - Steering axle assembly matched with combined type air suspension

Info

Publication number: CN112895806A
Application number: CN202110321032.1A
Authority: CN
Inventors: 张忠雷; 金鑫; 王金胜; 黄志刚; 范培斌; 杜喜阳; 汤超
Original assignee: Dongfeng Commercial Vehicle Co Ltd
Current assignee: Dongfeng Commercial Vehicle Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-06-04
Anticipated expiration: 2041-03-25
Also published as: CN112895806B

Abstract

The invention discloses a steering axle assembly matched with a composite air suspension, which comprises a steering trapezoidal mechanism, a hydraulic oil cylinder driving the steering trapezoidal mechanism, an air airbag and a plate spring, wherein one end of the hydraulic oil cylinder is connected to a trapezoidal arm of the steering trapezoidal mechanism, the other end of the hydraulic oil cylinder is connected to an axle shaft of the steering trapezoidal mechanism, the upper end surface of the middle part of the axle shaft is higher than the wheel center of a wheel, the plate spring is arranged on two sides of the axle shaft, two ends of each plate spring are respectively connected to the lower end of the air airbag and a frame, the plate spring is a corresponding guide arm of the air airbag, and the upper end of the air airbag is arranged on the frame. According to the steering axle assembly matched with the combined type air suspension, the hydraulic steering axle and the combined type air suspension are integrated, the transverse thrust rod bracket is arranged on the axle shaft, and the transverse thrust rod is installed, so that the structure is compact, and the layout is reasonable; the axle shaft adopts a negative fall shaft structure, so that the minimum ground clearance of the steering axle is improved.

Description

Steering axle assembly matched with combined type air suspension

Technical Field

The invention relates to the technical field of vehicles, in particular to a steering axle assembly matched with a composite air suspension.

Background

The steering axle refers to an axle that takes on the steering task. The front axle of a common automobile is a steering axle, and the front axle and the rear axle of a four-wheel steering automobile are steering axles. The steering axle deflects wheels at two ends by a certain angle by using a steering knuckle in an axle so as to realize the steering of the automobile. The steering axle is also subjected to longitudinal and lateral forces and moments caused by these forces, in addition to the vertical loads of the vehicle. Steer axles are one of the main load bearing assemblies of a vehicle, and are often developed with a matching design for the other load bearing system, the suspension system. The suspension system is a general term for all force-transmitting connecting devices between a frame and an axle or a wheel of an automobile, and has the functions of transmitting force and moment acting between the wheel and the frame, buffering impact force transmitted to the frame or a body from an uneven road surface and attenuating vibration caused by the impact force so as to ensure that the automobile runs smoothly.

The existing steering axle has basically the same structure and mainly comprises an I-shaped beam, a steering knuckle and the like. The conventional I-beam is bent downward at the middle to match the arrangement of the engine oil sump and lower the center of gravity of the vehicle. According to the record of the Chinese utility model patent No. 201920630773.6 entitled "steering axle assembly and vehicle using the same", the middle part of the front axle is bent downward. According to the record in "taper pin cooperation steering axle front axle assembly" of chinese utility model patent No. 202022131779.4, the front axle bilateral symmetry, both ends are for having the "fist" structure of king-pin hole, "for smooth and sly transitive" curved neck "structure between fist" and the plate spring seat, control the middle "I" structure that is of plate spring seat, through reducing the difference in height between "fist" and the plate spring seat plane, optimize "curved neck" transition zone circular arc simultaneously to can effectively reduce the one-level drop of front axle. The primary fall of the front axle is 60 mm. When the axle assembly is a drive axle, the suspension system accessories, such as the stabilizer bar, are typically secured to the axle housing of the drive axle by curved brackets.

The suspension system usually adopts a steel plate spring suspension, a steel plate spring mounting seat is processed on an I-beam of the axle assembly, a suspension steel plate spring is fixed on the steel plate spring mounting seat, when the impact force of a road to wheels is transmitted, the effects of buffering, vibration reduction and guiding transmission can be realized, and the smoothness of the whole vehicle is ensured to a certain extent; some high-end vehicles typically employ an air suspension arrangement that is smoother than conventional leaf spring suspensions.

The technology in the existing market mainly adopts a steel plate spring suspension, and all-air suspensions are adopted on part of vehicle types. The smoothness of the steel plate spring is not good than that of an air suspension; the full-air suspension occupies a large space on one hand, and is high in cost on the other hand, and the medium-sized commercial vehicle has large pressure in the aspects of arrangement space and vehicle income. In the face of increasingly enhanced requirements on electric and intelligent performance and smoothness of the whole vehicle, the required performance of the vehicle cannot be improved higher by matching with a steering axle of a conventional steel plate spring. Therefore, it is necessary to develop a steering axle of a hybrid air suspension having both advantages of a leaf spring suspension and an air suspension.

Disclosure of Invention

The invention aims to provide a steering axle assembly which is compact in structure and matched with a composite air suspension, and the minimum ground clearance of a steering axle and the smoothness of the suspension are improved.

On one hand, in order to achieve the purpose, the steering axle assembly of the matched composite air suspension comprises a steering trapezoid mechanism, a hydraulic oil cylinder, an air bag and a plate spring, wherein the hydraulic oil cylinder drives the steering trapezoid mechanism, one end of the hydraulic oil cylinder is connected to a trapezoid arm of the steering trapezoid mechanism, the other end of the hydraulic oil cylinder is connected to an axle shaft of the steering trapezoid mechanism, the upper end face of the middle part of the axle shaft is higher than the wheel center of a wheel, the plate spring is installed on two sides of the axle shaft, two ends of each plate spring are respectively connected to the lower end of the air bag and a frame, the plate spring is a corresponding guide arm of the air bag, and the upper end of the air bag is installed on the frame. The hydraulic steering axle and the combined air suspension are matched to form an assembly which is compact in structure, good in smoothness and high in cost performance and has the function of automatic steering of the hydraulic steering axle; the axle shaft adopts a negative fall shaft structure, so that the minimum ground clearance of the steering axle is improved.

In one embodiment, the axle shaft includes the side section and the end of middle section and both sides, be equipped with knuckle mounting end hole on the end in order to install the knuckle, the up end of side section is the fixed terminal surface of leaf spring, the leaf spring is installed on the fixed terminal surface of leaf spring, the up end of middle section is annex installation terminal surface, leaf spring fixed terminal surface is higher than the wheel center of wheel, annex installation terminal surface is higher than the fixed terminal surface of leaf spring. The axle shaft adopts a two-stage negative fall structure, so that the minimum ground clearance can be further improved, and the trafficability characteristic of the steering axle is provided.

In one embodiment, the fixed end face of the plate spring is provided with a plate spring mounting hole for connecting the plate spring through a U-shaped bolt; and an accessory bracket mounting hole is formed in the accessory mounting end surface, so that the accessory bracket and/or the transverse thrust rod bracket can be fixed through a fastener. The axle shaft adopts a two-stage negative fall structure, provides installation space for the plate spring, the accessory bracket and/or the transverse thrust rod bracket, and has compact structure and reasonable layout.

In one embodiment, the middle part of each plate spring is provided with a plate spring upper cover plate, and each plate spring is provided with a U-shaped bolt which passes through the plate spring upper cover plate, the plate spring and the plate spring fixing end surface and then is buckled from the lower part by a U-shaped bolt bottom plate and is locked by a fastener. The plate spring is fixed with the axle shaft by the U-shaped bolt and the U-shaped bolt bottom plate, and the connection is stable and firm.

In one embodiment, the lateral thrust rod bracket is hinged to one end of the lateral thrust rod, the other end of the lateral thrust rod is mounted to the frame through the lateral thrust bracket, and the lateral thrust rod is located above the frame shaft. The transverse thrust rod bracket is arranged on the axle shaft of the steering axle and is provided with the transverse thrust rod, so that the structure is compact, and the layout is reasonable.

In one embodiment, the accessory support comprises an oil tank hanging plate and an oil cylinder supporting plate, the oil tank hanging plate is fixed to be an oil tank and an oil pump for supplying oil to the hydraulic oil cylinder, and the oil cylinder supporting plate is hinged to one end of the hydraulic oil cylinder. Wherein, the accessory bracket provides the installation of oil tank and hydraulic cylinder, makes compact structure.

In one embodiment, the oil tank hanging plate is formed by bending upwards from the installation position of the oil tank hanging plate and the accessory installation end surface, and the oil cylinder supporting plate and the installation position of the accessory installation end surface extend out in the forward and backward directions. Wherein, oil tank and oil pump hang and install the one side at the oil tank link plate, and hydraulic cylinder installs in the hydro-cylinder extension board top, and is rationally distributed, saves space.

In one embodiment, a height valve is arranged beside each air bag, the height valve is fixed on the frame through a height valve upper support, and the height valve senses the load of a vehicle on the frame and controls the air pressure of the corresponding air bag according to the load. The altitude valve can sense the vehicle bearing on the frame and control the air sac to inflate and deflate in real time, so that the wheel center height of the air sac is consistent when the air sac is in no load and full load, and the smoothness of the whole vehicle is good.

In one embodiment, a limit block fixed on the frame is arranged above each leaf spring to limit the upward-jumping stroke of the corresponding leaf spring. The limiting block controls the upward jumping stroke of the plate spring, the front part can prevent the plate spring from colliding with a vehicle frame, and the rear part can prevent the drive axle from colliding with the vehicle frame.

In one embodiment, the steering trapezoid mechanism is formed by sequentially connecting the axle shaft, a first lower knuckle arm, a tie rod and a second lower knuckle arm, wherein the tail end of the first lower knuckle arm and the middle part of the second lower knuckle arm are respectively hinged with two ends of the tie rod, and the other end of the hydraulic oil cylinder is hinged with the tail end of the second lower knuckle arm;

the hydraulic oil cylinder and the transverse pull rod are arranged in front of and behind the transverse pull rod, an oil tank and an oil pump for supplying oil to the hydraulic oil cylinder are integrated and communicated to the hydraulic oil cylinder through a high-pressure oil pipe, and the oil tank and the oil pump are arranged above the transverse pull rod. The hydraulic oil cylinder is hinged with the tail end of the second lower knuckle arm, the hydraulic oil cylinder is located outside the steering trapezoid mechanism, the hydraulic oil cylinder and the tie rod are arranged in the front and at the back, and the oil tank, the oil pump and the tie rod are arranged up and down, so that the structure is reasonably distributed, and the structure of the steering axle is more compact.

In conclusion, the beneficial effects of the invention are as follows: the steering axle assembly matched with the composite air suspension integrates the hydraulic steering axle and the composite air suspension, and an assembly which has a compact structure, good smoothness and high cost performance and is also provided with the hydraulic steering axle for autonomous steering is matched; a transverse thrust rod bracket is arranged on a vehicle axle of the steering axle and is provided with a transverse thrust rod, so that the structure is compact and the layout is reasonable; the axle shaft adopts a negative fall (the fall is upward relative to the wheel center) shaft structure, so that the minimum ground clearance of the steering axle is improved; the middle section of the axle shaft can be fully utilized and matched with a suspension thrust rod fixing support, a support for mounting an oil tank and fixing an oil pump and the like, so that the bearing and multifunctional purposes of the axle are better realized; the oil pump and the oil tank are integrated, the high-pressure oil pipe controls the driving hydraulic oil cylinder to work, so that the steering trapezoid mechanism is driven to execute a steering instruction, the overall arrangement space is compact, and the steering function of the axle is better realized.

Drawings

Specific embodiments of the present invention will now be described in detail below with reference to the accompanying drawings. It is to be understood that the drawings are not necessarily to scale and that the drawings are merely illustrative of exemplary embodiments of the disclosure and are not to be considered limiting of the scope of the disclosure. In the drawings:

FIG. 1 is a schematic perspective view of a steering axle assembly of a hybrid air suspension adapted according to a preferred embodiment of the present invention;

FIG. 2 is a schematic top view of the steer axle of FIG. 1 with tires and wheel end assemblies removed;

FIG. 3 is a front view of the axle shaft of FIG. 2;

FIG. 4 is a schematic top view of the axle shaft of FIG. 2;

FIG. 5 is a side elevational view of the axle shaft of FIG. 2;

FIG. 6 is a cross-sectional structural view of the axle shaft of FIG. 2;

FIG. 7 is a schematic structural view of a half of the axle shaft of FIG. 2;

FIG. 8 is an enlarged view of a portion of the axle shaft of FIG. 2;

FIG. 9 is a schematic perspective view of an air suspension in a steer axle assembly of a hybrid air suspension adapted according to a preferred embodiment of the present invention;

FIG. 10 is a side elevational view of the air suspension of FIG. 9;

FIG. 11 is a perspective view of a steering axle assembly of a hybrid air suspension adapted according to a preferred embodiment of the present invention.

The elements in the figures are numbered as follows: a tire 10; a wheel end assembly 20; a knuckle 30; axle shafts 40 (wherein, knuckle mounting end holes 41, leaf spring fixing end faces 42, accessory mounting end faces 43, knuckle bosses 44; accessory bracket mounting holes 431); an oil tank 50; an oil pump 60; a hydraulic cylinder 70; a first lower arm 80; a second lower link arm 90; a tie rod 100; an accessory bracket 110 (an oil tank hanging plate 111 and an oil cylinder support plate 112); a high pressure oil line 120;

an air bladder 130; a plate spring 140; an airbag top plate 150; guide arm fixed end bracket 160; a shock absorber upper bracket 170; a shock absorber 180; a leaf spring stop block 190; a lateral thrust rod bracket 200; a lateral thrust rod 210; a U-bolt 220; u-bolt bottom plate 230; a transverse pushing bracket 240; a height valve upper bracket 250; the altitude valve 260; a plate spring upper cover plate 270.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As described above, the present invention provides a steering axle of a steering axle assembly that matches a composite air suspension, aiming at the requirement of developing a steering axle of a composite air suspension having the advantages of both a leaf spring suspension and an air suspension, and integrates the characteristics of a hydraulic steering axle and a composite air suspension, so as to match an assembly structure that has a compact structure, good smoothness, high cost performance, and also has the function of autonomous steering of the hydraulic steering axle, and the steering axle assembly can be used as a front steering axle or a rear steering axle, and can be arranged in combination with the actual number of axles, the axle distance, the turning radius, and the like of a vehicle. In addition, the steering axle assembly matched with the combined type air suspension further meets the comprehensive requirements of whole vehicle electromotion, intellectualization, vehicle smoothness and economy to a certain extent, fills the gap of the prior art in the market, and has wide application prospect.

Referring to fig. 1 and 2, in the steering axle of the steering axle assembly for a hybrid air suspension according to the preferred embodiment of the present invention, a tire 10 is mounted on a wheel end assembly 20 and then mounted on both ends of an axle shaft 40 through a knuckle 30, the knuckles 30 on both ends extend out of a first lower knuckle arm 80 and a second lower knuckle arm 90, respectively, and the end of the first lower knuckle arm 80 and the middle of the second lower knuckle arm 90 are hinged to both ends of a tie rod 100, respectively; the oil tank 50 and the oil pump 60 are integrated and then fixed on the axle shaft 40 through the accessory bracket 110, the oil pump 60 supplies oil to the hydraulic oil cylinder 70 through the high-pressure oil pipe 120, one end (cylinder body) of the hydraulic oil cylinder 70 is hinged with the accessory bracket 110, and the other end (piston rod) of the hydraulic oil cylinder 70 is hinged with the tail end of the second lower-section arm 90. The axle shaft 40, the first lower knuckle arm 80, the tie rod 100 and the second lower knuckle arm 90 form a trapezoidal link mechanism, and the hydraulic oil cylinder 70 is controlled to extend and retract through hydraulic pressure so as to push the second knuckle arm 90 to rotate.

More specifically, the left knuckle 30 and the right knuckle 30 are symmetrically connected to the left and right ends of the axle shaft 40 with the wheel end assembly 20, respectively, and the tire 10 is correspondingly fixed to the wheel end assembly 20. The oil tank hanging plate 111 of the accessory bracket 110 fixed on the axle shaft 40 is used for fixing the integrated assembly of the oil pump 60 and the oil tank 50, one end of the hydraulic oil cylinder 70 is connected to the oil cylinder support plate 112 extending out of the accessory bracket 110, and the other end is connected to the second lower knuckle arm 90. The piston reciprocating motion of the hydraulic oil cylinder 70 is controlled by the integrated assembly of the oil pump 60 and the oil tank 50 through the high-pressure oil pipe 120, the joint part of the hydraulic oil cylinder 70 drives the second lower knuckle arm 90 to swing relatively, the steering knuckle 30, the wheel end assembly 20 and the tire 10 corresponding to the left side rotate together, so that the tie rod 100 connected with the second lower knuckle arm 90 rotates, the first lower knuckle arm 80 is further driven to swing, the left steering knuckle 30, the wheel end assembly 20 and the tire 10 rotate together, the steering function of the axle assembly is realized, and the function of a steering trapezoid mechanism is realized.

In order to realize the arrangement and installation of the above mechanisms, the axle shaft 40 adopts an i-beam chain structure with negative fall. Referring to fig. 3 to 8, the axle shaft 40 is designed symmetrically, and includes a middle section, side sections on two sides, and a tail end, and the tail end is provided with a knuckle mounting end hole 41 for mounting the knuckle 30; the upper end surface of the side section is a plate spring fixing end surface 42 used for installing a plate spring of a suspension system; the upper end surface of the middle section is an accessory mounting end surface 43 for mounting the accessory bracket 110. The sections of the middle section and the side sections in the front-back direction are in an I shape, and the sections of the side sections in the front-back direction are in an I shape with a long top and a short bottom.

Specifically, the leaf spring fixing end face 42 is higher than the wheel center (primary drop, primary negative drop) of the wheel 10, and the attachment mounting end face 43 is higher than the leaf spring fixing end face 42 (secondary drop, secondary negative drop). A knuckle boss 44 is disposed on one side of each knuckle mounting end hole 41 for limiting the rotation angle of the steering axle assembly to limit the rotation angle limit position of the corresponding knuckle 30. The first-stage fall and the second-stage fall are upward falls, so that the minimum ground clearance is increased, the clearance between the lower wing surface of the I-beam and the ground is greatly improved under the condition of a complex road surface, and the trafficability of the whole vehicle is improved.

The leaf spring fixing end face 42 is provided with a leaf spring mounting hole for connection with a leaf spring of the suspension system. The accessory mounting end surface 43 defines an accessory bracket mounting hole 431 for securing the accessory bracket 110 with a fastener. Under the condition of meeting the arrangement space, the plate spring fixing end face 42 is arranged at the first-level drop position to arrange the plate springs, and meanwhile, the transverse thrust rod support can be arranged at the second-level drop position, and various supports required by the hydraulic drive steering axle can also be arranged.

The accessory bracket 110 comprises an oil tank hanging plate 111 and an oil cylinder supporting plate 112, the oil tank hanging plate 111 fixes the oil tank 50 and the oil pump 60, and the oil cylinder supporting plate 112 is hinged with one end (cylinder body) of the hydraulic oil cylinder 70. Specifically, the oil tank hanging plate 111 is formed by bending upward from the mounting position of the oil tank hanging plate and the accessory mounting end surface 43, and the mounting position of the oil cylinder supporting plate 112 and the accessory mounting end surface 43 extends out in the forward and backward directions. In this way, the hydraulic cylinder 70 and the tie rod 100 are disposed in front of and behind each other, and the oil tank 50, the oil pump 60, and the tie rod 100 are disposed vertically.

The attachment mounting end surface 43 may have two attachment brackets 110, and the two attachment brackets 110 are used for fixing the oil tank 50 and the oil pump 60 (shown in fig. 1) and mounting a lateral thrust rod of a suspension system, respectively.

Through steering operation in the cab, the ECU control unit transmits instructions to the oil tank 50 and the oil pump 60 (oil pump with oil tank assembly) through an electric wire harness, and an integrated induction chip arranged in the ECU control unit receives, analyzes and executes the instructions; the oil pump 60 senses oil pressure through the port sensor, thereby instructing the ports on the high pressure oil pipe 120 to absorb or pump oil to achieve the hydraulic thrust it provides to the hydraulic ram 70. Further, when the steering command is released, the oil tank 50 and the oil pump 60 (oil pump with tank assembly) command the oil pressure to return to normal by the return port sensor of the high-pressure oil pipe 120, so that the normal pressure state in the hydraulic cylinder 70 is maintained to extend the system life.

Referring to fig. 9 and 10, in the composite air suspension of the steering axle assembly of the hybrid air suspension according to the preferred embodiment of the present invention, the air bags 130 are respectively disposed at the left and right sides, the air bag 130 at each side is connected to the vehicle frame at the corresponding side through the air bag top plate 150, and the two ends of the plate spring 140 at each side are respectively connected to the vehicle frame at the corresponding side through the air bag 130 and the guide arm fixing end bracket 160. A shock absorber 180 fixed to the vehicle frame through a shock absorber upper bracket 170 is provided beside the air bag 130.

The plate springs 140 are single plate springs and guide arms of the air pockets 130, and a plate spring upper cover plate 270 is provided at the middle of each plate spring 140. The plate springs 140 on both sides are mounted to the axle shaft 10 (side sections of the axle shaft 10) by U-bolts 220 and U-bolt bottom plates 230, respectively. Specifically, a plate spring upper cover 270 is provided at the middle portion of each plate spring 140, and a U-bolt 220 is passed through the plate spring upper cover 270, the plate spring 140, and the plate spring fixing end face 42 and then fastened by a U-bolt bottom plate 230 from below, thereby mounting the plate spring 140 to the axle shaft 10.

A stop block 19 fixed on the frame is arranged above each plate spring 140. The limiting block 19 controls the upward-jumping stroke of the plate spring 140, the front face prevents the plate spring 140 from colliding with the vehicle frame, and the rear face prevents the drive axle from colliding with the vehicle frame.

One end of the lateral thrust rod 210 is mounted to the frame shaft 40 (the middle section) through the lateral thrust rod bracket 200, and the other end of the lateral thrust rod 210 is mounted to the frame through the lateral thrust bracket 240. Specifically, one end of the lateral thrust rod 210 is hinged to the lateral thrust rod bracket 200, and the lateral thrust rod bracket 200 is mounted to the corresponding attachment bracket mounting hole 431 of the axle shaft 40 by a fastener, thereby fixing the lateral thrust rod bracket 200 to the upper end surface of the axle shaft 40. The lateral thrust rod 210 is also correspondingly located above the carriage shaft 40.

A height valve 260 is arranged beside each air bag 130, and the height valve 260 is fixed on the vehicle frame through a height valve upper bracket 250. The altitude valve 260 senses the vehicle load on the frame and controls the air bladder 130 to inflate and deflate in real time, so as to adjust the air pressure of the air bladder 130, thereby ensuring the wheel center height of the air bladder 130 to be consistent when the air bladder is unloaded and fully loaded, and ensuring the smoothness of the whole vehicle to be better. A height valve 260 is disposed between the frame and the steer axle for maintaining the height of the vehicle body at a set height. As shown in fig. 1 and 2, the components of the altitude valve 10 relevant to the present invention mainly include a valve body 11, an operating lever 12, a connecting structure between the valve body 11 and the operating lever 12, a piston rod 14 located inside the valve body 11, and the like, wherein a part of the piston rod 14 can be seen in fig. 2

The steering axle assembly matched with the combined type air suspension can be suitable for arrangement of non-traditional fuel vehicles, the arrangement requirement of traditional engine oil pans is not needed, and the axle shaft is punched to arrange the transverse thrust rod support. The steering axle assembly matched with the air suspension can be used as a front steering axle or a rear steering axle by combining the requirements of non-traditional fuel vehicles such as electric vehicles at the present stage and the like, and can be comprehensively arranged by combining the number of axles, the wheelbase, the turning radius and the like of an actual vehicle.

The steering axle assembly matched with the composite air suspension integrates the characteristics of an electric hydraulic steering axle and the composite air suspension, and a large assembly which has a compact structure, good smoothness and high cost performance and is also provided with the hydraulic steering axle for self-steering is matched; in addition, comprehensive requirements of whole vehicle electromotion, intellectualization, vehicle smoothness and economy are realized to a certain extent, the vacancy of the market in the prior art is filled, and the application prospect is wide.

Compared with the prior art, the steering axle assembly matched with the composite air suspension has at least the following beneficial effects:

(1) the middle part of the axle shaft bends upwards, the minimum ground clearance is obviously increased, the trafficability of the vehicle facing a complex convex road surface is obviously improved, and the trafficability function of the axle is better realized;

(2) the structure of arranging the axle shaft based on the electric vehicle is improved, so that the end surface of the secondary fall base of the axle can be fully utilized, for example, a fixed bracket of a thrust rod of a suspension is matched, and the multifunctional functions of bearing, fixing accessories and the like of the axle are well realized;

(3) the hydraulic steering axle is provided, and the steering control of the axle is realized through an intelligent integrated assembly based on hydraulic pressure as a medium, so that the traditional steering rod system with a vertical arm, a steering pull rod and the like through a steering gear is replaced, and the hydraulic steering axle is more excellent in arrangement space;

(4) and the composite air suspension is matched, so that the competitiveness of the whole vehicle, such as compact structure, good smoothness, high cost performance and the like, is improved.

Here, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims.

The shapes, sizes, ratios, angles, and numbers disclosed to describe aspects of the specification and claims are examples only, and thus, the specification and claims are not limited to the details shown. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted.

Where the terms "comprising", "having" and "including" are used in this specification, there may be another part or parts unless otherwise stated, and the terms used may generally be in the singular but may also be in the plural.

It should be noted that although the terms "first," "second," "top," "bottom," "side," "other," "end," "other end," and the like may be used and used in this specification to describe various components, these components and parts should not be limited by these terms. These terms are only used to distinguish one element or section from another element or section. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with the top and bottom elements being interchangeable or switchable with one another, where appropriate, without departing from the scope of the present description; the components at one end and the other end may be of the same or different properties to each other.

Further, in constituting the component, although it is not explicitly described, it is understood that a certain error region is necessarily included.

In describing positional relationships, for example, when positional sequences are described as being "on.. above", "over.. below", "below", and "next", unless such words or terms are used as "exactly" or "directly", they may include cases where there is no contact or contact therebetween. If a first element is referred to as being "on" a second element, that does not mean that the first element must be above the second element in the figures. The upper and lower portions of the member will change depending on the angle of view and the change in orientation. Thus, in the drawings or in actual construction, if a first element is referred to as being "on" a second element, it can be said that the first element is "under" the second element and the first element is "over" the second element. In describing temporal relationships, unless "exactly" or "directly" is used, the description of "after", "subsequently", and "before" may include instances where there is no discontinuity between steps.

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

Claims

1. The utility model provides a steering axle assembly who matches combined type air suspension which characterized in that: the automobile steering device comprises a steering trapezoidal mechanism, a hydraulic oil cylinder (70) for driving the steering trapezoidal mechanism, an air airbag (130) and a plate spring (140), wherein one end of the hydraulic oil cylinder (70) is connected to a trapezoidal arm of the steering trapezoidal mechanism, the other end of the hydraulic oil cylinder is connected to an axle shaft (40) of the steering trapezoidal mechanism, the upper end face of the middle part of the axle shaft (40) is higher than the wheel center of a wheel (10), the plate spring (140) is installed on two sides of the axle shaft (40), two ends of each plate spring (140) are respectively connected to the lower end of the air airbag (130) and a frame, the plate spring (140) is a corresponding guide arm of the air airbag (130), and the upper end of the air airbag (130) is installed on the frame.

2. The steer axle assembly of matching compound air suspension of claim 1, wherein: axle (40) are including the side section and the end of middle section and both sides, be equipped with knuckle mounting end hole (41) in order to install knuckle (30) on the end, the up end of side section is leaf spring fixed end face (42), install leaf spring (140) on leaf spring fixed end face (42), the up end of middle section is annex installation end face (43), leaf spring fixed end face (42) are higher than the wheel center of wheel (10), annex installation end face (43) are higher than leaf spring fixed end face (42).

3. The steer axle assembly of matching compound air suspension of claim 2, wherein: the leaf spring fixing end face (42) is provided with a leaf spring mounting hole for connecting with the leaf spring (140) through a U-shaped bolt (220); an accessory bracket mounting hole (431) is formed in the accessory mounting end face (43) and used for fixing the accessory bracket (110) and/or the transverse thrust rod bracket (200) through a fastener.

4. The steer axle assembly of matching compound air suspension of claim 3, wherein: and a plate spring upper cover plate (270) is arranged in the middle of each plate spring (140), and the U-shaped bolt (220) penetrates through the plate spring upper cover plate (270), the plate spring (140) and the plate spring fixing end face (42) and then is buckled from the lower part by a U-shaped bolt bottom plate (230) and locked by a fastener.

5. The steer axle assembly of matching compound air suspension of claim 3, wherein: the transverse thrust rod bracket (200) is hinged with one end of a transverse thrust rod (210), the other end of the transverse thrust rod (210) is installed on the frame through a transverse thrust bracket (240), and the transverse thrust rod (210) is located above the frame shaft (40).

6. The steer axle assembly of matching compound air suspension of claim 3, wherein: the accessory support (110) comprises an oil tank hanging plate (111) and an oil cylinder supporting plate (112), the oil tank hanging plate (111) is fixed to an oil tank (50) and an oil pump (60) which are used for supplying oil to the hydraulic oil cylinder (70), and the oil cylinder supporting plate (112) is hinged to one end of the hydraulic oil cylinder (70).

7. The steer axle assembly of matching compound air suspension of claim 6, wherein: the oil tank hanging plate (111) is formed by bending upwards at the installation position of the accessory installation end face (43), and the oil cylinder support plate (112) extends forwards and backwards at the installation position of the accessory installation end face (43).

8. The steer axle assembly of matching compound air suspension of claim 1, wherein: and a height valve (260) is arranged beside each air bag (130), the height valve (260) is fixed on the frame through a height valve upper bracket (250), and the height valve (260) senses the load of a vehicle on the frame and controls the air pressure of the corresponding air bag (130) according to the load.

9. The steer axle assembly of matching compound air suspension of claim 1, wherein: and a limiting block (190) fixed on the frame is arranged above each leaf spring (140) to limit the upward jumping stroke of the corresponding leaf spring (140).

10. The steer axle assembly of a matched compound air suspension as claimed in any one of claims 1 to 9, wherein: the steering trapezoidal mechanism is formed by sequentially connecting the axle shaft (40), a first lower knuckle arm (80), a cross-link (100) and a second lower knuckle arm (90), the tail end of the first lower knuckle arm (80) and the middle part of the second lower knuckle arm (90) are respectively hinged with two ends of the cross-link (100), and the other end of the hydraulic oil cylinder (70) is hinged with the tail end of the second lower knuckle arm (90);

the hydraulic oil cylinder (70) and the transverse pull rod (100) are arranged in front of and behind each other, an oil tank (50) and an oil pump (60) which supply oil to the hydraulic oil cylinder (70) are integrated into a whole and communicated to the hydraulic oil cylinder (70) through a high-pressure oil pipe (120), and the oil tank (50) and the oil pump (60) are arranged above the transverse pull rod (100).