Chassis of two-wheeled agricultural robot
Technical Field
The invention relates to the field of agricultural robots, in particular to a chassis of a two-wheeled agricultural robot.
Background
Most of the agricultural robots on the market are in four-wheel drive or two-wheel drive mode, and most of the agricultural robots are used for carrying out agricultural work across furrows, and in a greenhouse, the action is inflexible, so that the two-wheel robots are arranged, but the two-wheel robots need to be self-balancing, the whole structure is complex, and the production cost is high.
The application number is CN2023104290534, an automatic plant protection robot is disclosed, a transverse two-wheel structure is adopted, operation is needed to be carried out by crossing ridges, and the robot is not suitable for a greenhouse with limited movement range.
The application number is CN2018103050918, a two-wheeled robot with multiple movement modes is disclosed, the flywheel is adopted to ensure the self-balance of the two-wheeled robot during movement, the flywheel has high cost and high use requirement, and the whole mechanism is complex.
There is therefore a need for a two-wheeled agricultural robot chassis that solves the above-mentioned technical problems.
Disclosure of Invention
The invention aims to provide a chassis of a two-wheeled agricultural robot, wherein an auxiliary wheel assembly is integrated on a tire support, and the assembly comprises a lifting mechanism, a sensor and a damping mechanism, so that an efficient, stable and safe vehicle body steering structure is realized.
The front steering driving module comprises an integrated joint, a tire support, a hub motor, an auxiliary wheel assembly, a force sensor and a damping assembly, wherein the driving module connecting plate is respectively fixed at the front end and the rear end of the chassis frame, the front steering driving module is connected with the driving module connecting plate through the integrated joint, the integrated joint is fixed on the tire support, the hub motor is arranged on the tire support, the auxiliary wheel assembly comprises two groups of motors, an auxiliary wheel connecting plate, gears, screw rods, screw nuts, guide rails, guide rail sliding blocks, bearing blocks, auxiliary plates, auxiliary wheels and force sensor connecting plates, the auxiliary wheel assembly is symmetrically arranged on the tire support, the motors are arranged on the auxiliary wheel connecting plate, the gears are respectively arranged on a motor shaft and the screw rods, the bearing blocks are fixed on the auxiliary wheel connecting plate, the guide rails are fixed on the auxiliary wheel connecting plate, the guide rail sliding blocks are arranged on the guide rails, the screw rods and the screw nuts are arranged on the auxiliary wheel connecting plate through the bearing blocks, the auxiliary plates are connected with the auxiliary wheel connecting plate through the screw rods and the guide rail sliding blocks, the auxiliary wheel sliding blocks are arranged on the guide rails, the auxiliary wheel connecting plate, the auxiliary wheel sliding blocks are connected with the auxiliary wheel connecting plate, the auxiliary wheel connecting plate is connected with the auxiliary wheel, and the auxiliary wheel connecting plate is connected with the required front steering driving module connecting plate, and the front steering driving module is connected with the tire connecting plate, and the auxiliary wheel connecting plate is connected with the required to be connected with the front steering driving module.
Preferably, the screw and the screw nut are a ball screw and a ball screw nut, the motor is a motor, and the force sensor is a one-dimensional force sensor, a two-dimensional force sensor or a three-dimensional force sensor.
Preferably, the tire support also comprises a rubber block, and the rubber block is arranged between the force sensor and the tire support to play a role in shock absorption.
The tire driving device is characterized by further comprising a damping component, wherein the damping component comprises four groups of guide rod fixing seats, guide rods, springs, lengthened linear bearings and a force sensor connecting plate B, the four groups of damping components are symmetrically arranged on the driving module main body left and right respectively, the guide rod fixing seats are fixed on the tire support, the guide rods are fixed on the guide rod fixing seats, the springs are sleeved on the guide rods, and the lengthened linear bearings are sleeved on the guide rods.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a diagram showing the effect of the second embodiment of the present invention.
Fig. 2 is an axial side effect diagram of a front steering drive module according to a second embodiment of the present invention.
Fig. 3 is an exploded view of a front steering drive module according to an embodiment of the present invention.
Fig. 4 is an exploded view of a front steering drive module according to a second embodiment of the present invention.
1-4, Chassis frame, 2, drive module connection plate, 3, front steering drive module, 4, rear steering drive module, 31, integral joint, 32, tire support, 33, in-wheel motor, 34, auxiliary wheel assembly, 35, force sensor, 36, rubber block, 37, shock absorbing assembly, 341, motor, 342, auxiliary wheel connection plate, 343, gear, 344, ball screw, 345, ball screw nut, 346, guide rail, 347, guide rail slide, 348, bearing seat, 349, auxiliary plate, 350, auxiliary wheel, 351, force sensor connection plate A, 371, guide bar fixing seat, 372, guide bar, 373, spring, 374, lengthened linear bearing, 375, force sensor connection plate B.
Detailed Description
In order to make the technical contents of the present invention more clearly understood, the detailed description of the embodiments will be given.
It should be noted that when an element is referred to as being "fixed" or "disposed" or "mounted" on "another element, it can be directly or indirectly connected to the other element, or it can be directly or indirectly connected to the other element, the terms" upper "," lower "," left "," right "," front "," rear "," vertical "," horizontal "," top "," bottom "," inner "," outer ", etc. refer to the directions or positions shown in the drawings, are for convenience of description only, and are not to be construed as limiting the present technical solution, the terms" first "," second "are only used for convenience of description, and are not to be construed as indicating or implying relative importance or implying any particular amount of technical features, and the terms" plurality "mean two or more unless otherwise specifically limited.
Example one
Referring to fig. 1 to 3, fig. 1 to 3 show a two-wheeled agricultural robot chassis, which comprises a chassis frame 1, a driving module connecting plate 2, a front steering driving module 3 and a rear steering driving module 4; the front steering driving module 3 comprises an integrated joint 31, a tire bracket 32, a hub motor 33, an auxiliary wheel assembly 34, a force sensor 35 and a shock absorption assembly 36; the driving module connecting plate 2 is fixed on the chassis frame 1, the front steering driving module 3 is connected with the driving module connecting plate 2 through the integrated joint 31, the integrated joint 31 is fixed on the tire bracket 32, the front steering driving module 3 is steered through the integrated joint 31, the hub motor 33 is arranged on the tire bracket 32, the wheel bracket 32 directly drives the whole robot chassis to move through controlling the hub motor 33, two sides of the tire bracket 32 are surrounded by three surrounding baffles, the auxiliary wheel assembly 34 is surrounded, the rigidity of the tire bracket 32 is increased, the integral aesthetic property is also improved, the rubber block 36 is fixed on the tire bracket 32, the force sensor 35 is fixed with the rubber block 36, when the auxiliary wheel assembly 34 meets the obstacle or is concave, the rubber block 36 firstly plays a certain buffering role at the moment of contact, the stability of the chassis during movement is ensured, the auxiliary wheel assembly 34 comprises a motor 341, an auxiliary wheel connecting plate 342, a gear 343, a ball screw 344, a ball screw nut 345, a guide rail 346, a guide rail slider 347, a bearing seat 349, an auxiliary wheel 350 and a force sensor connecting plate 351, the auxiliary wheel assembly 34 is arranged on the tire bracket 32 symmetrically, the motor shaft 341 is arranged on the motor shaft, the ball screw 342 is arranged on the auxiliary connecting plate 343, and the ball screw wheel assembly 342 is respectively meshed with the gear 343, the motor 341 drives the gear 343 to rotate to drive the ball screw nut 345 to move up and down, the bearing seat 348 is fixed on the auxiliary wheel connecting plate 342, the guide rail 346 is fixed on the auxiliary wheel connecting plate 342, the guide rail slide block 347 is mounted on the guide rail 346, the ball screw 344 and the screw nut 345 are mounted on the auxiliary wheel connecting plate 342 through the bearing seat 348, the auxiliary plate 349 is connected with the auxiliary wheel connecting plate 342 through the ball screw nut 345 and the guide rail slide block 347, the auxiliary plate 349 moves along with the ball screw nut 345 on the guide rail 346, the auxiliary wheel 350 is mounted on the auxiliary plate 349, the auxiliary wheel assembly 34 is used for assisting the chassis to fall down when the chassis is stationary and stabilizing when the chassis moves, the force sensor connecting plate 351 is fixed on the auxiliary wheel connecting plate 342, the auxiliary wheel assembly is connected with the force sensor 35 through the force sensor connecting plate 351, and required parts of the rear steering driving module 4 are the same as those of the front steering driving module 3.
When the chassis encounters an obstacle or is sunken in the moving process, the rubber block 36 firstly plays a role in damping, the force sensor 35 detects that the force changes, the motor 341 is controlled to rotate to drive the ball screw 344, and the ball screw nut 345 arranged on the ball screw 344 drives the auxiliary plate 349 to move up and down along with the rotation of the ball screw 344 to ensure the stability of the chassis in moving.
Example two
Referring to fig. 4, the second embodiment is a modification of the first embodiment, and basically the same reference numerals are used for the same components as those of the specific embodiment shown in fig. 1 to 3, and compared with the first embodiment, the second embodiment includes a damper assembly 37, the damper assembly 37 includes a guide rod fixing seat 371, a guide rod 372, a spring 373, an elongated linear bearing 374, and a force sensor connecting plate b 375, the damper assembly includes two groups, which are symmetrically mounted on the tire support 32, the guide fixing seat 371 is fixed on the tire support 32, the guide rod 372 is fixed on the guide rod fixing seat 371, the spring 373 is sleeved on the guide rod 372, and the elongated linear bearing 374 is sleeved on the guide rod 372. When the chassis is in the moving process, the auxiliary wheel 350 bumps against the obstacle, the auxiliary wheel assembly 34 can transmit force to the shock absorption assembly 37 at the moment of being stressed, the motor has a response process, and the spring 373 compresses on the guide rod 372 to buffer the auxiliary wheel assembly, so that the auxiliary wheel is prevented from being subjected to excessive impact force, the steering structure of the chassis is optimized, the influence of road impact on the auxiliary wheel and the chassis is reduced, and the stability and safety of the chassis are further improved.
The mounting auxiliary wheel connection plate 342 of the guide rail 346 has a U-shaped structure, and the mounting auxiliary plate 349 of the guide rail slider 347 has a U-shaped structure as well. When the two are combined, a closed structure is formed, and the whole has great strength. This unique structural design not only increases the load carrying capacity of the component itself, but also enhances the stability of the overall auxiliary wheel assembly.
The auxiliary wheel assembly is positioned on two sides of the hub motor, the space is compact, the height of the auxiliary wheel assembly does not exceed the height of the tire support, the lifting mechanism of the auxiliary wheel assembly does not touch the chassis frame during tire steering, the height and the width of the chassis frame are not increased due to the influence of the auxiliary wheel mechanism, the design ensures that all parts cooperatively operate in a limited space through reasonably arranging and optimizing the connection mode among all parts by integrating the damping assembly and the auxiliary wheel assembly, the effective buffer of the auxiliary wheel is realized, the steering structure of the chassis is optimized, the influence of road surface impact on the whole auxiliary wheel and the chassis is reduced, and the stability and the safety of the chassis are further improved. In addition, the integrated design also enables the structure of the chassis to be more compact, lowers the gravity center of the chassis, improves the control performance of the chassis, and enhances the adaptability of the chassis under different road conditions.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.