Chassis structure of high-clearance work vehicle

Abstract

The application provides a chassis structure of a high-clearance working vehicle, comprising a walking assembly, a connecting assembly and two support top plates. The walking assembly is fixedly connected to the bottom of the support top plate, and the connecting assembly connects the two support top plates and also connects the support top plate and the walking assembly. The walking assembly comprises two axles and electric drive wheels symmetrically arranged on both sides of each axle. The connecting assembly comprises a torsion device for independently deflecting the two support top plates. The torsion device comprises a first bearing, and the walking assembly can rotate along the central axis of the first bearing. The connecting assembly further comprises a hydraulic cylinder for steering the walking assembly and providing limiting. When the hydraulic cylinder is extended or retracted, the walking assembly is driven to rotate around the central axis of the support top plate. The application can be used to solve the technical problems of poor passability, weak escape ability, easy wheel suspension in rugged terrain and poor adaptability to different terrain structures of the existing high-clearance working vehicle.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicles, and particularly relates to a chassis structure of a high-clearance operation vehicle. BACKGROUND

[0002] The yield of crops has an extremely far-reaching influence on the whole country, and therefore, it is of great significance to ensure the stable and efficient output of crops. Large agricultural machinery can effectively reduce the burden of farmers, improve the efficiency of agricultural production operations, and reduce the influence of human factors on the agricultural production process, and therefore is widely applied in agricultural production operations.

[0003] For some large agricultural machinery with a low chassis, due to the limitation of the height of the chassis, field operations can only be carried out on crops in the early stage of production or on low crops, and the high-clearance operation equipment cannot be used after the crops grow to a certain height. The high-clearance operation equipment has good adaptability and passability in complex terrains due to the high ground clearance and narrow wheel hub and relatively small damage to farmland, and has been widely applied in various agricultural production processes, especially in the middle and late stages of the growth of high-stalk crops such as corn, tobacco, cotton and sugarcane. The high-clearance operation equipment is more in line with the current development status of agriculture and is convenient for popularization and application.

[0004] At present, the mainstream driving mode of the high-clearance operation vehicle is a traditional fuel engine. The chassis structure of the high-clearance operation vehicle adopting the traditional fuel engine driving mode needs to reserve space for the engine and the transmission mechanism during design, resulting in a relatively complex chassis structure of the existing high-clearance operation vehicle, a large turning radius of the vehicle, and poor passability and weak escape ability of the operation vehicle. Due to the large size of the engine, the space below the chassis structure is occupied, the passability of the operation vehicle is poor, the escape ability is weak, and the wheels are easily suspended in rugged terrain, thereby resulting in poor adaptability of the operation vehicle to different terrain structures. SUMMARY

[0005] The application provides a chassis structure of a high-clearance operation vehicle, which can be used to solve the technical problem that the existing high-clearance operation vehicle has poor passability, weak escape ability, and poor adaptability to different terrain structures.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme:

[0007] The application provides a chassis structure of a high-clearance operation vehicle, which can be used to solve the technical problem that the existing high-clearance operation vehicle has poor passability, weak escape ability, and poor adaptability to different terrain structures.

[0008] The walking assembly comprises two axles and electric drive wheels symmetrically arranged on both sides of each axle, each axle comprises a cross beam and two longitudinal beams vertically fixed on both sides of the cross beam, and the outer side of each longitudinal beam is provided with the electric drive wheel.

[0009] The connecting assembly comprises a torsion device for independently deflecting the two support top plates, the torsion device comprises a first bearing, and bearing seats symmetrically arranged on two end faces of the first bearing, wherein one of the bearing seats is fixedly connected with an inner ring of the first bearing, and the other bearing seat is fixedly connected with an outer ring of the first bearing; the end face of the first bearing is perpendicular to a plane where the support top plates are located, and the other ends of the two bearing seats are respectively connected with the corresponding support top plates on the same side, and the walking assembly can rotate along a central axis C1 of the first bearing.

[0010] In an implementation, the first bearing is a slewing bearing, which is used to limit the deflection of the two bearing seats and the two support top plates around an axis perpendicular to the central axis C1 of the first bearing.

[0011] In an implementation, a protrusion is arranged at the center of the bottom of the support top plate, which is used to cooperate with a fixed through hole arranged at the center of the cross beam, so as to realize the connection between the walking assembly and the support top plate and the steering of the walking assembly.

[0012] In an implementation, the connecting assembly further comprises a hydraulic cylinder for steering and limiting the walking assembly, one end of the hydraulic cylinder is fixedly connected with a first fixing seat arranged at the bottom of the support top plate, the other end of the hydraulic cylinder is fixedly connected with a second fixing seat arranged on the cross beam, and the first fixing seat and the second fixing seat are located in the same horizontal plane; the hydraulic cylinder is parallel to the support top plate, and the hydraulic cylinder drives the walking assembly to rotate around a central axis C2 of the fixed through hole when the hydraulic cylinder is extended or retracted.

[0013] In an implementation, a second bearing is arranged in the fixed through hole, which is used to reduce the rotating friction resistance, and an end cover is arranged at the bottom of the fixed through hole.

[0014] In an implementation, the cross beam is a hollow structure, and two mounting holes for arranging motor controllers are symmetrically arranged at the bottom of the cross beam, and hole covers are arranged on the mounting holes.

[0015] In an implementation, the longitudinal beam is a hollow structure, and a wiring port for arranging a hub motor cable is arranged at the bottom of the longitudinal beam, and a bolt through hole for fixing the electric drive wheel is arranged at the outer edge of the wiring port.

[0016] In an implementation, the electric drive wheel comprises a hub motor, and the hub motor is provided with a mounting seat on one side of the longitudinal beam, and a base hole corresponding to the bolt through hole is arranged on the mounting seat.

[0017] In an implementation, a reinforcing rib is arranged at the connection between the cross beam and the longitudinal beam, which is used to improve the overall structural strength.

[0018] In an implementation manner, the support top plate is a hollow frame structure.

[0019] The application provides a chassis structure of a high-clearance operation vehicle, which is provided with front and rear independent walking assemblies and a support top plate, and the walking assemblies are connected through a connecting assembly and are capable of being relatively deflected, the axle in the walking assembly increases the height of the chassis, and four-wheel independent electric driving is adopted, so that the technical problems of poor passability, weak escape ability, easy suspension of wheels in rugged terrain and poor adaptability to different terrain structures of the existing high-clearance operation vehicle can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0021] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the application.

[0022] Figure 2 It is a schematic diagram of the cooperation structure of the walking assembly and the support top plate of the embodiment of the application.

[0023] In the drawings, the components represented by the numbers are listed as follows:

[0024] 1-walking assembly; 11-axle; 111-cross beam; 1111-mounting hole; 1112-hole cover; 112-longitudinal beam; 1121-wiring port; 1122-bolt through hole; 113-second fixing seat; 114-fixing through hole; 115-second bearing; 116-end cover; 117-stiffener; 12-electric drive wheel; 121-hub motor; 122-mounting seat; 123-base hole; 2-connecting assembly; 21-torsion device; 211-bearing seat; 212-first bearing; 22-hydraulic cylinder; 3-support top plate; 31-first fixing seat; 32-protrusion; C1-center axis of first bearing; C2-center axis of fixing through hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the application more clear, the application will be further described below in combination with the drawings. The drawings are only used for illustrative description and cannot be understood as limitation to the patent.

[0026] In order to more simply illustrate the embodiments, some parts which are well known to those skilled in the art but are not related to the main content of the present creation will be omitted in the drawings or description. In addition, some parts will be omitted, enlarged or reduced in the drawings for the convenience of description, but do not represent the size or the whole structure of the actual product.

[0027] In the description of the embodiments, the terms "upper", "lower", "left", "right", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning. First, the following will be described in conjunction with Figure 1 The embodiments of the present application are introduced.

[0028] Please refer to Figure 1 , Figure 1 The overall structure of the embodiment of the present application is shown in the figure.

[0029] A chassis structure of a high-clearance working vehicle, comprising a walking assembly 1, a connecting assembly 2 and two support top plates 3; wherein the walking assembly 1 is fixedly connected to the bottom of the support top plate 3, and the connecting assembly 2 connects the two support top plates 3 while also connecting the support top plate 3 and the walking assembly 1. The main function of the walking assembly 1 is to provide driving force for the device, the connecting assembly 2 can also be used for steering and deflection between the front and rear axles of the device, and the support top plate 3 is used to provide a platform for installing or carrying devices with different functions.

[0030] The walking assembly 1 comprises two axles 11 and electric drive wheels 12 symmetrically arranged on both sides of each axle 11, and each axle 11 comprises a cross beam 111 and two longitudinal beams 112 fixedly arranged on both sides of the cross beam 111; the outer side of each longitudinal beam 112 is provided with an electric drive wheel 12; the device adopts four-wheel independent electric drive, and the electric drive wheels 12 are installed on the side bottom of the axle 11. The four-wheel independent electric drive can realize differential speed between any two wheels, and the main steering mode of the device is to realize steering by active differential speed between the electric drive wheels 12 on both sides of any axle. In low adhesion road surface environment, four-wheel independent drive can also improve the vehicle driving stability and the ability to escape from trouble in special circumstances. The axle 11 is in C-shaped structure, and the longitudinal beam 112 is used to lift the whole axle 11 to improve the adaptability of the device to different terrain structures when working in the field, and the cross beam 111 is used to connect the longitudinal beams 112 and fix the load support top plate 3.

[0031] The connecting assembly 2 comprises a torsion device 21 for independently deflecting the two support top plates 3, the torsion device 21 comprising a first bearing 212 and bearing seats 211 symmetrically arranged at two end faces of the first bearing 212, one of the bearing seats 211 being fixedly connected with an inner ring of the first bearing 212 and the other bearing seat 211 being fixedly connected with an outer ring of the first bearing 212; the end faces of the first bearing 212 are perpendicular to the plane where the support top plates 3 are located, and the other ends of the two bearing seats 211 are respectively connected with the corresponding support top plates 3 on the same side, and the walking assembly 1 and the support top plates 3 can rotate along a central axis C1 of the first bearing 212. The main function of the torsion device 21 is to change the structure of the front and rear axle in the prior art, so that the two walking assemblies 1 and the two support top plates 3 fixed on the walking assemblies 1 can be relatively deflected, thereby maximizing the contact between the four wheels and the ground, reducing the situation that a single wheel or a single side wheel is suspended and loses driving force, and improving the overall passability of the device and the adaptability to different road environments.

[0032] In the embodiment of the present application, the first bearing 212 is a slewing bearing, which is used to limit the deflection of the two bearing seats 211 and the two support top plates 3 around the central axis C1 perpendicular to the first bearing 212. Compared with ordinary bearings, the slewing bearing can bear higher load, and at the same time, the slewing bearing can also realize physical limiting, reducing the possibility of overturning due to excessive deflection of the torsion device 212.

[0033] Please refer to Figure 2 , Figure 2 is a schematic view of the walking assembly and the support top plate cooperation structure of the embodiment of the present application.

[0034] In the embodiment of the present application, a protrusion 32 is arranged at the bottom center of the support top plate 3, which is used to cooperate with a fixed through hole 114 arranged at the center of the cross beam 111, so as to realize the connection between the walking assembly 1 and the support top plate 3 and the steering of the walking assembly 1. The walking assembly 1 is used to carry the support top plate 3 and also to realize steering, so the connection between the walking assembly 1 and the support top plate 3 needs to be able to bear a large load and also to realize steering in the case of vibration, deflection or shaking. The cooperation between the protrusion 32 and the fixed through hole 114 can better realize these effects. It should be noted that there are many connection modes between the support top plate 3 and the walking assembly 1, which are not limited here.

[0035] In the embodiment of the present application, the connecting assembly 2 further comprises a hydraulic cylinder 22 for turning the walking assembly 1 and providing limiting, one end of the hydraulic cylinder 22 is fixed to the first fixed seat 31 at the bottom of the support top plate 3, the other end of the hydraulic cylinder 22 is fixed to the second fixed seat 113 on the cross beam 111, the first fixed seat 31 and the second fixed seat 113 are located in the same horizontal plane; the hydraulic cylinder 22 is parallel to the support top plate 3, when the hydraulic cylinder 22 is extended or retracted, the walking assembly 1 is driven to rotate around the central axis C2 of the fixed through hole 114, so as to realize the turning of the walking assembly 1. The hydraulic cylinder 22 can be switched between locking and floating, when the device is driving straight on a flat or less undulating road surface, the hydraulic cylinder 22 is floating, so as to reduce the influence on the differential speed between the walking assemblies 1, when the device is driving in a curve or large-angle heavy-load turning, the hydraulic cylinder 22 works, providing turning assistance for the device while locking and limiting. It should be noted that the two walking assemblies 1 in the embodiment of the present application are respectively connected with the hydraulic cylinder 22, so that the two walking assemblies 1 can realize independent turning, and the device can realize same-direction turning or reverse turning of the front and rear walking assemblies 1 according to specific working conditions, so as to realize a smaller turning radius in some special cases. In the case of good road conditions, hydraulic cylinder assistance is not needed, at this time the hydraulic cylinder is in a floating state, the turning mode is single-differential mode, and the hydraulic cylinder is followed; when the road conditions are poor, such as when the vehicle is trapped, needs to be rescued or is driving downhill, the hydraulic cylinder needs to be involved in assistance when the vehicle cannot drive in a certain direction through the differential, which is divided into two cases: 1. When the vehicle needs to be rescued, the hydraulic cylinder will actively assist in a single direction, ensuring that the turning angle will not oscillate due to the output torque of the driving wheel, at this time the differential is not involved, and the turning mode is single-assistance mode; 2. When the vehicle is driving downhill, the hydraulic cylinder will assist in turning according to the driving direction, ensuring that the turning angle will not be out of control due to downhill, and the turning mode is hydraulic differential hybrid turning.

[0036] In the embodiment of the present application, a second bearing 115 for reducing the rotating friction resistance is further arranged in the fixed through hole 114, and an end cover 116 is arranged on the bottom of the fixed through hole 114. The second bearing 115 is used to reduce the rotating friction resistance between the walking assembly 1 and the support top plate 3, and improve the turning smoothness, and the design of the end cover 116 facilitates the disassembly and replacement of the second bearing 115, or the regular maintenance or repair of the second bearing 115.

[0037] In the embodiment of the present application, the cross beam 111 is a hollow structure, two installation holes 1111 for arranging motor controllers are symmetrically arranged at the bottom of the cross beam 111, and hole covers 1112 are arranged on the installation holes 1111. The hollow structure design of the cross beam 111 facilitates the storage of the motor controllers, and the built-in motor controllers in the cross beam 111 reduce the possibility of damage caused by the impact of gravel or crops on the motor controllers in the actual use environment.

[0038] In the embodiment of the present application, the longitudinal beam 112 is a hollow structure, and a bottom is provided with a wire port 1121 for arranging a hub motor cable, and an outer edge of the wire port 1121 is provided with a bolt through hole 1122 for fixing the electric drive wheel 12. The hollow structure design of the longitudinal beam 112 and the wire port 1121 facilitates the built-in hub motor cable, and reduces the possibility of damage caused by the exposure of the motor cable in the actual use environment. The bolt through hole 1122 facilitates the installation of the electric drive wheel 12.

[0039] In the embodiment of the present application, the electric drive wheel 12 includes a hub motor 121, and the hub motor 121 is provided with a mounting seat 122 on one side facing the longitudinal beam 112, and the mounting seat 122 is provided with a base hole 123 corresponding to the bolt through hole 1122.

[0040] In the embodiment of the present application, the connection part of the transverse beam 111 and the longitudinal beam 112 is provided with a reinforcing rib 117 for improving the overall structural strength.

[0041] In the embodiment of the present application, the support top plate 3 is a hollow frame structure. The frame structure can reduce the overall weight of the support top plate 3 while improving the structural strength to bear higher load.

[0042] The embodiment of the present application provides a chassis structure of a high-gear working vehicle, which is provided with front and rear independent walking assemblies and a support top plate, and the walking assemblies are connected through a connecting assembly and can be relatively deflected. The axle in the walking assembly raises the chassis height, and four-wheel independent electric drive is adopted, so that the technical problems that the existing high-gear working vehicle has poor passability, weak escape ability, and is easy to cause wheel suspension in rugged terrain, and has poor adaptability to different terrain structures can be solved.

[0043] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A chassis structure for a high-clearance work vehicle, characterized by, The walking assembly (1), the connecting assembly (2) and the two support top plates (3) are included. The walking assembly (1) includes two axles (11) and electric drive wheels (12) symmetrically arranged on both sides of each axle (11). Each axle (11) includes a crossbeam (111) and two longitudinal beams (112) vertically fixed on both sides of the crossbeam (111); the outer side of each longitudinal beam (112) is provided with the electric drive wheel (12). The connecting assembly (2) includes a torsion device (21) for independently deflecting the two support top plates (3). The torsion device (21) includes a first bearing (212) and bearing seats (211) symmetrically arranged on both end faces of the first bearing (212). One of the bearing seats (211) is fixedly connected with the inner ring of the first bearing (212), and the other bearing seat (211) is fixedly connected with the outer ring of the first bearing (212). The end face of the first bearing (212) is perpendicular to the plane where the support top plate (3) is located, and the other end of each bearing seat (211) is connected with the corresponding support top plate (3) on the same side, and the walking assembly (1) can rotate along the central axis C1 of the first bearing (212).

2. The chassis structure of a high-clearance work vehicle according to claim 1, characterized in that, The first bearing (212) is a slewing bearing for limiting the deflection of the two bearing seats (211) and the two support top plates (3) around the central axis C1 perpendicular to the first bearing (212).

3. The chassis structure of a high-clearance work vehicle of claim 1, wherein, The bottom center of the support top plate (3) is provided with a protrusion (32) for cooperating with a fixed through hole (114) opened in the center of the crossbeam (111), so as to realize the connection between the walking assembly (1) and the support top plate (3), and the steering of the walking assembly (1).

4. The chassis structure of a high-clearance work vehicle according to claim 3, characterized in that, The connecting assembly (2) further includes a hydraulic cylinder (22) for steering and limiting the walking assembly (1). One end of the hydraulic cylinder (22) is fixed to a first fixed seat (31) at the bottom of the support top plate (3), and the other end is fixed to a second fixed seat (113) on the crossbeam (111). The first fixed seat (31) and the second fixed seat (113) are located in the same horizontal plane. The hydraulic cylinder (22) is parallel to the support top plate (3), and the hydraulic cylinder (22) drives the walking assembly (1) to rotate around the central axis C2 of the fixed through hole (114) when it is extended or retracted.

5. The chassis structure of a high-clearance work vehicle of claim 3, wherein, A second bearing (115) for reducing the rotating friction resistance is further arranged in the fixed through hole (114), and an end cover (116) is arranged on the bottom of the fixed through hole (114).

6. The chassis structure of a high-clearance work vehicle of claim 1, wherein, The crossbeam (111) is a hollow structure, and two mounting holes (1111) for arranging motor controllers are symmetrically arranged at the bottom of the crossbeam.

7. The chassis structure of a high-clearance work vehicle of claim 1, wherein, The longitudinal beam (112) is a hollow structure, and a wiring port (1121) for arranging hub motor cables is arranged at the bottom of the longitudinal beam. The outer edge of the wiring port (1121) is provided with a bolt through hole (1122) for fixing the electric drive wheel (12).

8. The chassis structure of a high-clearance work vehicle of claim 1, wherein, The electric drive wheel (12) comprises a wheel hub motor (121), which is provided with a mounting seat (122) on one side of the longitudinal beam (112), and the mounting seat (122) is provided with a base hole (123) corresponding to a bolt through hole (1122).

9. The chassis structure of a high-clearance work vehicle of claim 1, wherein, The connecting part of the cross beam (111) and the longitudinal beam (112) is provided with a reinforcing rib (117).

10. The chassis structure of a high-clearance work vehicle of claim 1, wherein, The support top plate (3) is a hollow frame structure.

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