A modular drive axle and an engineering vehicle

Abstract

The present invention discloses a modular drive axle and an engineering vehicle, which include a slewing platform, a slewing bearing, a rear axle housing, a front suspension, a rear suspension, a tie rod, a wheel side reducer and a tire assembly; the inner ring of the slewing bearing is connected to the slewing platform, and the outer ring is connected to the lower plane of the frame longitudinal beam; one end of the front suspension is hinged to the slewing platform, and the other end is hinged to the rear axle housing; one end of the rear suspension is hinged to the slewing platform, and the other end is hinged to the rear axle housing; one end of the tie rod is hinged to the slewing platform, and the other end is hinged to the rear axle housing; the wheel side reducers are fixed on both sides of the rear axle housing; the tire assembly is connected through the output end of the wheel side reducer. This modular drive axle has balanced force and strong load-bearing capacity. The mining dump truck equipped with this modular designed drive axle has a large carrying capacity, strong power, strong climbing ability, small turning radius, high cross-country performance, improves work efficiency, and reduces production and maintenance costs.

Description

Technical Field

[0001] The present invention relates to a modular drive axle and belongs to the field of construction machinery. Background Art

[0002] Traditional large mining dump trucks are generally two-axle rear-axle drive dump trucks. Such products are large in volume and load capacity and can meet the usage requirements of large mines. However, traditional mining dump trucks have problems such as large load capacity, few tire numbers, and excessive single-tire load, resulting in short tire life. Due to the large vehicle volume and wheelbase, the turning radius of the vehicle is too large, and the overall vehicle passability is poor. And because the structures of the rear drive axle and the front steering axle are inconsistent, modular production cannot be achieved, increasing production, usage, and maintenance costs. Summary of the Invention

[0003] The purpose of the present invention is to provide an engineering vehicle with strong driving ability, high transportation efficiency, strong climbing ability, small turning radius, and high passability, and to reduce production and maintenance costs.

[0004] The present invention is implemented according to the following technical solutions

[0005] The present invention discloses a modular drive axle in a first aspect, which includes a slewing platform, a slewing bearing, a rear axle housing, a front suspension, a rear suspension, a tie rod, a wheel side reducer, and a tire assembly; the inner ring of the slewing bearing is connected to the slewing platform, and the outer ring is connected to the lower plane of the vehicle frame longitudinal beam; one end of the front suspension is hinged to the slewing platform, and the other end is hinged to the rear axle housing; one end of the rear suspension is hinged to the slewing platform, and the other end is hinged to the rear axle housing; one end of the tie rod is hinged to the slewing platform, and the other end is hinged to the rear axle housing; the wheel side reducer is fixed on both sides of the rear axle housing; the tire assembly is connected through the output end of the wheel side reducer.

[0006] In some embodiments, the slewing platform includes an upper platform, a side platform, a torsion-resistant tube assembly, a steering cylinder mounting seat, a front suspension mounting seat, a rear suspension mounting seat, and a tie rod mounting seat; the front edge of the side platform is welded to the top edge of the upper platform; the torsion-resistant tube assembly is welded on the side platform; the front suspension mounting seat is welded at the lower connection of the upper platform and the side platform; the rear suspension mounting seat and the tie rod mounting seat are respectively welded at the lower rear of the upper platform; the steering cylinder mounting seat is welded above the front of the upper platform.

[0007] In some embodiments, the upper platform is provided with a plurality of threaded holes for installing the slewing bearing.

[0008] In some embodiments, the number of front suspension mounts on the slewing platform is two, symmetrically arranged on both sides of the lower connection between the upper platform and the side platform; one end of the front suspension is hinged to the front suspension mount on the slewing platform, and the other end of the front suspension is hinged to the front suspension mount on the rear axle housing.

[0009] In some embodiments, the rear suspension mounts on the slewing platform are located behind the transverse tie rod mounts on the slewing platform; the number of rear suspension mounts on the slewing platform is two, symmetrically arranged on both sides of the lower rear part of the upper platform; one end of the rear suspension is hinged to the rear suspension mount on the slewing platform, and the other end is hinged to the rear suspension mount on the rear axle housing; one end of the transverse tie rod is hinged to the transverse tie rod mount on the slewing platform, and the other end is hinged to the transverse tie rod mount on the rear axle housing, restricting the slewing platform from swinging within a predetermined range in the lateral direction.

[0010] In some embodiments, the number of steering cylinder mounts is two, symmetrically arranged on both sides of the front upper part of the upper platform; one end of the steering cylinder is hinged to the steering cylinder mount, and the other end is hinged to the vehicle frame. Under the action of the steering cylinder, the slewing platform rotates around the slewing bearing axis.

[0011] In some embodiments, gusset plates are symmetrically welded on both sides of the lower included angle between the upper platform and the side platform; the gusset plate is an angle plate, whose horizontal part extends to the middle and rear part of the upper flat plate, and the longitudinal part extends to the bottom edge of the side platform; among them, the position at the included angle of the gusset plate is the place where the width of the gusset plate is the largest.

[0012] In some embodiments, the torsion-resistant tube assembly includes a torsion-resistant tube, a hinge point mount, a triangular plate, and a triangular frame; a rectangular through-hole is opened on the side platform, and a symmetrically arranged triangular plate is welded on the front surface of the side platform on both sides of the rectangular through-hole, and a torsion-resistant tube is welded between the two triangular plates; a hinge point mount is welded on the circumferential surface of the torsion-resistant tube corresponding to the rectangular through-hole; a triangular frame is welded on the rear axle housing, and a pin shaft mounting hole is provided on the triangular frame, and the pin shaft mounting hole is coaxially arranged with the hinge point mount and then connected by a pin shaft, so that the slewing platform can rotate around this hinge point within a predetermined range.

[0013] In some embodiments, the rear axle housing is coaxial with the two side wheel reducers, intersecting and perpendicular to the slewing bearing axis.

[0014] In a first aspect, the present invention discloses an engineering vehicle, including a vehicle frame, on which at least two of the above-mentioned modular drive axles are installed.

[0015] In some embodiments, the vehicle frame is of a box structure. There are two slewing bearing mounting seats at the front and rear of the bottom of the vehicle frame. There are four steering cylinder mounting seats in the middle of the vehicle frame, and the steering cylinders on the slewing platforms of the front and rear modular drive axles are hinged through two front steering cylinder mounting seats and two rear steering cylinder mounting seats respectively; under the control of the engineering vehicle, the steering cylinders can realize the linkage of the two front steering cylinders, the two rear steering cylinders or the four steering cylinders respectively, so as to achieve the purpose of steering the front drive axle, the rear drive axle or the front and rear drive axles simultaneously.

[0016] Advantages of the present invention:

[0017] The modular drive axle has balanced stress and strong load-bearing capacity, realizes complete unification of the front and rear axle components, greatly improves the product versatility, reduces the types of components at the same time, and lowers the production and maintenance costs; there are a large number of engineering vehicles matching this modular drive axle, with strong power, strong climbing ability and small turning radius. Description of the drawings

[0018] The drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0019] In the drawings:

[0020] Figure 1 is the three-dimensional view of the modular drive axle of the embodiment of the present invention Figure 1 (One side tire assembly is not shown).

[0021] Figure 2 is the three-dimensional view of the modular drive axle of the embodiment of the present invention Figure 2 (One side tire assembly is not shown).

[0022] Figure 3 is the sectional view of the modular drive axle of the embodiment of the present invention.

[0023] Figure 4 is the left view of the modular drive axle of the embodiment of the present invention.

[0024] Figure 5 is the top view of the whole vehicle of the mining dump truck of the embodiment of the present invention.

[0025] Figure 6 is the front view of the slewing platform of the present invention;

[0026] Figure 7 is the right view of the slewing platform of the present invention;

[0027] Figure 8 is the three-dimensional rotary platform of the present invention Figure 1 ;

[0028] Figure 9 is the three-dimensional rotary platform of the present invention Figure 2 .

[0029] In the figure: 1 - torsion-resistant pipe assembly, 2 - steering cylinder mounting seat, 3 - upper platform, 4 - rear suspension mounting seat, 5 - cross tie rod mounting seat, 6 - front suspension mounting seat, 7 - side platform, 8 - rib plate; 10 - slewing bearing, 20 - rotary platform, 30 - rear suspension, 40 - wheel side reducer, 50 - rear axle housing, 60 - front suspension, 70 - tire assembly, 80 - cross tie rod, 90 - steering cylinder, 100 - vehicle frame.

[0030] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Specific Embodiments

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown in the figure, a modular drive axle includes a slewing platform 20, a slewing bearing 10, a rear axle housing 50, a front suspension 60, a rear suspension 30, a tie rod 80, a wheel side reducer 40, and a tire assembly 70.

[0035] The inner ring of the slewing bearing 10 is connected to the slewing platform 20 by bolts, and the outer ring is connected to the lower plane of the longitudinal frame of the vehicle by bolts. A connection steering cylinder mounting seat is provided on the slewing platform 20. Under the action of the steering cylinder, the slewing platform 20 rotates around the axis of the slewing bearing 10. The slewing platform 20 is connected to the rear axle housing 50 through the front suspension 60, the rear suspension 30, and the tie rod 80. And the torsion-resistant tube on the slewing platform 20 is installed and connected to the tripod in the rear axle housing 50. Two wheel side reducers 40 are fixed on both sides of the rear axle housing 50 by bolts, and the tire assembly 70 is installed on the step of the wheel side reducer 40. This modular drive axle has balanced force and strong load-bearing capacity. The mining dump truck matching this modular designed drive axle has a large carrying capacity, strong power, strong climbing ability, small turning radius, high cross-country performance, improves work efficiency, and reduces production and maintenance costs.

[0036] The following gives a preferred embodiment of the above embodiment regarding the slewing platform:

[0037] As shown in Figure 6 , Figure 7 , Figure 8 , Figure 9 the figure, the slewing platform 20 includes an upper platform 3, side platforms 7, a torsion-resistant tube assembly 1, a steering cylinder mounting seat 2, a front suspension mounting seat 6, a rear suspension mounting seat 4, and a tie rod mounting seat 5; the front edge of the side platform 7 is welded to the top edge of the upper platform 3; the torsion-resistant tube assembly 1 is welded to the side platform 7; the front suspension mounting seat 6 is welded at the lower connection of the upper platform 3 and the side platform 7; the rear suspension mounting seat 4 and the tie rod mounting seat 5 are respectively welded at the lower rear of the upper platform 3; the steering cylinder mounting seat 2 is welded at the upper front of the upper platform 3.

[0038] Continuing to refer to Figure 8 the figure, the upper platform 3 is provided with a plurality of threaded holes for installing the slewing bearing 10. The specific scheme is: there is a large round hole in the center of the upper platform 3, and a circle of evenly spaced threaded holes is provided around the large round hole.

[0039] Continuing to refer to Figure 9 the figure, a rib plate 8 is welded at the lower included angle between the upper platform 3 and the side platform 7.

[0040] A further scheme: the number of rib plates 8 is two, symmetrically arranged on both sides of the lower included angle between the upper platform 3 and the side platform 7.

[0041] A further scheme: the number of front suspension mounting seats 6 is two, symmetrically arranged on both sides of the lower connection of the upper platform 3 and the side platform 7, and the front suspension mounting seat 6 is located outside the rib plate 8.

[0042] Preferred solution: The rib plate 8 is an angle plate, whose horizontal part extends to the middle and rear part of the upper flat plate 3, and the longitudinal part extends to the bottom edge of the side platform 7; wherein, the position at the included angle of the rib plate is the place where the width of the rib plate is the largest.

[0043] Preferred solution: Chamfers are provided on both the horizontal part and the longitudinal part of the rib plate 8.

[0044] Continue to refer to Figure 7 、 Figure 8 As shown in the figure, the torsion-resistant tube assembly 1 includes a torsion-resistant tube, a hinge point mounting seat, a triangular plate and a triangular frame; a rectangular through-hole is provided on the side platform 7, and a symmetrically arranged triangular plate is welded on the front surface of the side platform 7 on both sides of the rectangular through-hole, and a torsion-resistant tube is welded between the two triangular plates; the hinge point mounting seat is welded on the circumferential surface of the torsion-resistant tube corresponding to the rectangular through-hole; the rear axle housing 50 is welded with a triangular frame, and a pin shaft mounting hole is provided on the triangular frame, and the pin shaft mounting hole is coaxially arranged with the hinge point mounting seat and then connected by a pin shaft, so that the slewing platform 20 can rotate around this hinge point within a predetermined range.

[0045] Continue to refer to Figure 9 As shown in the figure, the rear suspension mounting seat 4 is located at the rear side of the transverse tie rod mounting seat 5; the number of the rear suspension mounting seats 4 is two, and they are symmetrically arranged on both sides of the rear lower part of the upper platform 3. The specific solution is: the transverse tie rod mounting seat 5 is composed of a hinge point mounting seat and a fixed seat, the fixed seat is welded on the upper platform 3, and the hinge point mounting seat is welded on the fixed seat.

[0046] Continue to refer to Figure 8 As shown in the figure, the number of the steering cylinder mounting seats 2 is two, and they are symmetrically arranged on both sides of the front upper part of the upper platform 3.

[0047] Continue to refer to Figure 6 As shown in the figure, the inner included angle between the upper platform 3 and the side platform 7 is an angle greater than 90 degrees.

[0048] The following gives a preferred embodiment of the connection between the slewing platform and the rear axle housing in the above embodiment:

[0049] Continue to refer to Figure 2 As shown in the figure, the rear axle housing 50 is provided with a triangular frame; a front suspension mounting seat is provided and is connected to the front suspension 60; a rear suspension mounting seat is provided and is connected to the rear suspension 30; a transverse tie rod mounting seat is provided and is connected to the transverse tie rod 80; threaded holes are provided on both sides for connecting the wheel side reducer 40.

[0050] Continue to refer to Figure 1As shown, the number of front suspension mounting seats 6 on the slewing platform 20 is two, and two front suspension mounting seats are also provided on the rear axle housing 50, and the number of front suspensions 60 is two; one end of the front suspension 60 is hinged to the front suspension mounting seat 6 on the slewing platform 20, and the other end of the front suspension 60 is hinged to the front suspension mounting seat on the rear axle housing 50.

[0051] Continue to refer to Figure 1 , Figure 4 As shown, the number of rear suspension mounting seats 4 on the slewing platform 20 is two, and two rear suspension mounting seats are also provided on the rear axle housing 50, and the number of rear suspensions 30 is two; one end of the rear suspension 30 is hinged to the rear suspension mounting seat 4 on the slewing platform 20, and the other end is hinged to the rear suspension mounting seat on the rear axle housing 50; one end of the cross tie rod 80 is hinged to the cross tie rod mounting seat 5 on the slewing platform 20, and the other end is hinged to the cross tie rod mounting seat on the rear axle housing 50, restricting the slewing platform 20 from swinging within a predetermined range in the lateral direction.

[0052] Continue to refer to Figure 1 As shown, the number of steering cylinder mounting seats 2 on the slewing platform 20 is two, and two steering cylinder mounting seats are also provided on the vehicle frame 100, and the number of steering cylinders 90 is two; one end of the steering cylinder 90 is hinged to the steering cylinder mounting seat 2 on the slewing platform 20, and the other end is hinged to the steering cylinder mounting seat on the vehicle frame 100, and under the action of the steering cylinder 90, the slewing platform 20 rotates around the slewing bearing 10 axis.

[0053] As can be seen from the above, the slewing platform 20 is hinged to the triangular frame in front of the rear axle housing 50 through the torsion-resistant tube on the side platform 7, and the slewing platform 20 can rotate within a certain range around this hinge point. One end of the cross tie rod 80 is hinged to the lower rear of the slewing platform 20, and the other end of the cross tie rod 80 is hinged to the upper part of the rear axle housing 50, restricting the slewing platform 20 from swinging within a certain range in the lateral direction. The slewing platform 20 and the rear axle housing 50 are connected by two front suspensions 60 and two rear suspensions 30, restricting the slewing platform 20 from moving up and down within a certain range. Through the above six connections, it is ensured that the slewing platform 20 can rotate up, down, left, right and around the hinge point of the torsion-resistant tube and the triangular frame within a certain range. This connection method, on the one hand, improves the stability of the slewing platform, effectively absorbs the bending and torsional stresses generated by the bad road surface, and enables the two-side tire assemblies 70 to adaptively contact the ground completely; on the other hand, it enhances the load-bearing capacity of the modular drive axle.

[0054] The present invention also discloses an engineering vehicle, including a vehicle frame 100, and at least two of the above modular drive axles are mounted on the vehicle frame 100.

[0055] Preferred solution: As Figure 5As shown in the figure, the frame 100 is of a box structure. There are two slewing bearing mounting seats at the front and rear of the bottom of the frame 100. There are four steering cylinder mounting seats in the middle of the frame 100. The frame 100 is respectively hinged to the steering cylinder mounting seats on the slewing platforms of the front and rear modular drive axles through two front steering cylinder mounting seats and two rear steering cylinder mounting seats by means of steering cylinders 90. Under the control of the engineering vehicle, the steering cylinders 90 can respectively achieve the linkage of the two front steering cylinders, the two rear steering cylinders or the four steering cylinders, so as to achieve the purpose of steering the front drive axle, steering the rear drive axle or steering the front and rear drive axles simultaneously. When the front and rear drive axles turn simultaneously and in opposite directions, the turning radius of the mining dump truck can be effectively reduced. When the front and rear drive axles turn simultaneously and in the same direction, the mining dump truck can travel along an oblique line direction.

[0056] The modular drive axle of the present invention realizes the complete unification of the front and rear axle parts, greatly improves the product versatility, reduces the types of parts at the same time, and reduces the production and maintenance costs.

[0057] It should be particularly noted that the present invention applies the modular drive axle to a two-axle mining dump truck, but does not limit the number of its axles. Any mining dump truck adopting this method, regardless of the number of axles, should be included within the scope of the present invention.

[0058] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0059] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features contained in other embodiments rather than other features, the combinations of the features of different embodiments also mean that they are within the protection scope of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0060] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content to be equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A modular drive axle, characterized in that: it includes a slewing platform, a slewing bearing, a rear axle housing, a front suspension, a rear suspension, a tie rod, a wheel side reducer and a tire assembly; the inner ring of the slewing bearing is connected to the slewing platform, and the outer ring is connected to the lower plane of the longitudinal beam of the vehicle frame; one end of the front suspension is hinged to the slewing platform, and the other end is hinged to the rear axle housing; one end of the rear suspension is hinged to the slewing platform, and the other end is hinged to the rear axle housing; one end of the tie rod is hinged to the slewing platform, and the other end is hinged to the rear axle housing; the wheel side reducer is fixed on both sides of the rear axle housing; the tire assembly is connected through the output end of the wheel side reducer; the slewing platform includes an upper platform, a side platform, a torsion-resistant tube assembly, a steering cylinder mounting seat, a front suspension mounting seat, a rear suspension mounting seat and a tie rod mounting seat; the front edge of the side platform is welded to the top edge of the upper platform; the torsion-resistant tube assembly is welded on the side platform; the front suspension mounting seat is welded at the lower connection of the upper platform and the side platform; the rear suspension mounting seat and the tie rod mounting seat are respectively welded at the lower rear of the upper platform; the steering cylinder mounting seat is welded in front of and above the upper platform; the rear suspension mounting seat on the slewing platform is located behind the tie rod mounting seat on the slewing platform; the number of the rear suspension mounting seats on the slewing platform is two, symmetrically arranged on both sides of the lower rear of the upper platform; one end of the rear suspension is hinged to the rear suspension mounting seat on the slewing platform, and the other end is hinged to the rear suspension mounting seat on the rear axle housing; one end of the tie rod is hinged to the tie rod mounting seat on the slewing platform, and the other end is hinged to the tie rod mounting seat on the rear axle housing, restricting the slewing platform from swinging within a predetermined range in the lateral direction; the torsion-resistant tube assembly includes a torsion-resistant tube, a hinge point mounting seat, a triangular plate and a triangular frame; the side platform is provided with a rectangular through hole, and a symmetrically arranged triangular plate is welded on the front surface of the side platform on both sides of the rectangular through hole, and a torsion-resistant tube is welded between the two triangular plates; the hinge point mounting seat is welded on the circumferential surface of the torsion-resistant tube corresponding to the rectangular through hole; the rear axle housing is welded with a triangular frame, and the triangular frame is provided with a pin shaft mounting hole, and the pin shaft mounting hole is coaxially arranged with the hinge point mounting seat and then connected through a pin shaft, so that the slewing platform can rotate around this hinge point within a predetermined range.

2. The modular drive axle according to claim 1, characterized in that: the upper platform is provided with a plurality of threaded holes for installing the slewing bearing.

3. The modular drive axle according to claim 1, characterized in that: the number of the front suspension mounting seats on the slewing platform is two, symmetrically arranged on both sides of the lower connection of the upper platform and the side platform; one end of the front suspension is hinged to the front suspension mounting seat on the slewing platform, and the other end of the front suspension is hinged to the front suspension mounting seat on the rear axle housing.

4. The modular drive axle according to claim 1, characterized in that: the number of the steering cylinder mounting seats is two, symmetrically arranged on both sides in front of and above the upper platform; one end of the steering cylinder is hinged to the steering cylinder mounting seat together, and the other end is hinged to the vehicle frame, and under the action of the steering cylinder, the slewing platform rotates around the axis of the slewing bearing.

5. A modular drive axle according to claim 1, characterized in that: Reinforcing plates are symmetrically welded on both sides at the lower included angle between the upper platform and the side platform; The reinforcing plate is an angle plate, the horizontal part of which extends to the middle and rear part of the upper platform, and the longitudinal part extends to the bottom edge of the side platform; wherein, the position at the included angle of the reinforcing plate is the position where the width of the reinforcing plate is the largest.

6. A modular drive axle according to claim 1, characterized in that: The rear axle housing is coaxial with the wheel side reducers on both sides, intersects and is perpendicular to the axis of the slewing bearing.

7. An engineering vehicle, comprising a vehicle frame, characterized in that: At least two modular drive axles according to any one of claims 1 to 6 are installed on the vehicle frame.

8. An engineering vehicle according to claim 7, characterized in that: The vehicle frame is of a box structure, there are front and rear slewing bearing mounting seats at the bottom of the vehicle frame, there are four steering cylinder mounting seats in the middle of the vehicle frame, and the steering cylinders on the slewing platforms of the front and rear modular drive axles are respectively hinged through two front steering cylinder mounting seats and two rear steering cylinder mounting seats; Under the control of the engineering vehicle, the steering cylinders can respectively achieve the linkage of the two front steering cylinders, the two rear steering cylinders or the four steering cylinders, so as to achieve the purpose of steering the front drive axle, the rear drive axle or the front and rear drive axles simultaneously.

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