CN219325863U

CN219325863U - Agricultural machine drive steering unit

Info

Publication number: CN219325863U
Application number: CN202320965933.9U
Authority: CN
Inventors: 印祥; 母仕宇; 杜娟; 周昊霖; 李庆钊
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2023-04-26
Filing date: 2023-04-26
Publication date: 2023-07-11
Anticipated expiration: 2033-04-26

Abstract

The utility model discloses an agricultural machinery driving steering unit, which relates to the technical field of agricultural vehicle chassis and comprises a combined mounting plate fixedly connected with the chassis, wherein a steering motor is fixedly arranged on one side of the combined mounting plate, the steering motor is in transmission connection with a steering column assembly, and the bottom of the steering column assembly is connected with a wheel assembly through a wheel supporting frame. The agricultural machinery driving steering unit provided by the utility model has a simple connection structure, and improves the working performance and the integration of the driving steering unit.

Description

Agricultural machine drive steering unit

Technical Field

The utility model relates to the technical field of agricultural vehicle chassis, in particular to an agricultural machine driving steering unit.

Background

The agricultural mobile platform has the advantages of strong adaptability, good ground trafficability, convenient control and the like, and plays a great role in the agricultural production process. At present, the agricultural mobile platform realizes various and complex parts of steering and driving, and the integration of parts is not high, so that the mobile platform has poor working performance in a complex working environment and is not easy to maintain. The improvement of the working performance and the integration of the driving steering unit is a core problem of researching the agricultural chassis, and is one of the problems which are urgent to be solved for promoting the development of unmanned technology of agricultural machinery.

Disclosure of Invention

The utility model aims to provide an agricultural machinery driving steering unit, which solves the problems in the prior art, has a simple connecting structure and improves the working performance and the integration of the driving steering unit.

In order to achieve the above object, the present utility model provides the following solutions:

the utility model provides an agricultural machine driving steering unit which comprises a combined mounting plate fixedly connected with a chassis, wherein the combined mounting plate is provided with a bolt hole, the combined mounting plate is connected with the chassis through a bolt, a steering motor is fixedly arranged on one side of the combined mounting plate, the steering motor is in transmission connection with a steering column assembly, and the bottom of the steering column assembly is connected with a wheel assembly through a wheel supporting frame.

Optionally, the steering motor transmission is connected with the motor shaft, the motor shaft top passes behind the combination mounting panel transmission is connected with the moment of torsion stopper, and in order to when steering system breaks down, the restriction transmission torsion avoids steering motor to produce the trouble because the steering resistance is too big, the moment of torsion stopper passes through the transmission shaft to be connected with the input shaft of gear box, the output shaft of gear box with steering column assembly top transmission is connected, and gear box input shaft and output shaft are the cavity axle.

Optionally, the steering column assembly includes fixed connection's last steering column and lower steering column, go up steering column top fixedly connected with steering spindle, the output shaft of gear box with the steering spindle transmission is connected, wheel support frame top with lower steering column fixed connection.

Optionally, the fixed cover that turns to that wears to be equipped with on the combination mounting panel, the two pass through welded connection, the steering spindle passes through bearing and bush and locates in the cover that turns to, just the steering spindle top passes turn to behind the cover with the output shaft transmission of gear box is connected.

Optionally, the steering shaft is clamped with an anti-drop limiting device, the anti-drop limiting device comprises two symmetrically arranged semi-ring blocks, and the two semi-ring blocks are fixedly connected into a ring structure by bolts; the lower end face of the anti-drop limiting device is abutted with the upper end face of the steering sleeve, and when the driving steering unit is integrally lifted, the lower end face of the anti-drop limiting device contacts with the upper end face of the steering sleeve, so that the steering column assembly, the wheel supporting frame and the wheels are prevented from falling off due to gravity.

Optionally, the steering limiting device comprises two horizontally symmetrically arranged limiting pins and one vertically arranged limiting pin; two spacing pins that the level was arranged respectively with lower steering column lateral wall fixed connection, the spacing pin of vertical arrangement with combination mounting panel bottom fixed connection, the spacing pin of vertical arrangement can be with the spacing pin contact of horizontal arrangement, and it can restrict steering column assembly's rotation angle.

Optionally, the two bushings are respectively connected with the upper end and the lower end of the inner side of the steering sleeve, the bushings are provided with steps, and the bushings are clamped on the steering sleeve through the steps; the lower end face of the bushing at the lower end is connected with the upper end face of the bearing; the lower end face of the bearing is connected with the wheel supporting frame, the inner side of the bearing is connected with the steering column assembly, and the gravity of the mobile platform is transmitted to the driving steering unit through the combined mounting plate and the steering sleeve.

Optionally, the wheel assembly comprises a hub and a tire, wherein the hub is in transmission connection with a hub motor, and a brake device is arranged on the hub; the bottom of the wheel support frame is rotationally connected with the wheel hub through a wheel shaft; the hub motor is arranged in the hub and forms a wheel with the hub, the tyre and the brake device. The driving steering unit provides walking driving force by the hub motor and steering driving force by the steering motor.

Optionally, an angle sensor is installed at the top of the upper shell of the gear box, and the angle sensor is coaxially connected with the top end of the output shaft of the gear box.

Compared with the prior art, the utility model has the following technical effects:

the agricultural machinery driving steering unit provided by the utility model has the advantages of simple connection structure and accurate positioning when being connected with a vehicle body. The driving steering unit has compact connection among all parts and is easy to assemble and disassemble. The steering driving unit is additionally provided with a torque limiter, so that the safety of the steering driving unit is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an overall view of an agricultural drive steering unit provided by the present utility model;

FIG. 2 is an enlarged view of a portion of an agricultural drive steering unit provided by the present utility model;

FIG. 3 is a steering column assembly of the agricultural drive steering unit provided by the present utility model;

fig. 4 is a partial cross-sectional view of a steering sleeve connection portion of an agricultural drive steering unit provided by the present utility model.

Reference numerals illustrate: 1-gear box, 2-steering sleeve, 3-steering motor, 4-steering column assembly, 5-wheel support frame, 6-tire, 7-wheel hub, 8-brake equipment, 9-wheel hub motor, 10-motor shaft, 11-torque limiter, 12-transmission shaft, 13-angle sensor, 14-anticreep stop, 15-combination mounting panel, 16-spacing pin, 17-steering shaft, 18-upper steering column, 19-lower steering column, 20-bush, 21-bearing.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

The utility model provides an agricultural machinery driving steering unit, which is shown in figures 1, 2, 3 and 4, and comprises a combined mounting plate 15 fixedly connected with a vehicle chassis, wherein a steering motor 3 is fixedly arranged on one side of the combined mounting plate 15, the steering motor 3 consists of 24V and 200W direct current brushless motors and a speed reducer with a reduction ratio of 40, rated output torque and rotating speed are respectively 18 N.m and 100r/min, the steering motor 3 is in transmission connection with a steering column assembly 4, and the bottom of the steering column assembly 4 is connected with a wheel assembly through a wheel supporting frame 5.

Specifically, the steering motor 3 is connected with a motor shaft 10 in a transmission way, the top of the motor shaft 10 passes through a combined mounting plate 15 and then is connected with a torque limiter 11 in a transmission way, the torque limiter 11 is connected with an input shaft of the gear box 1 through a transmission shaft 12, an output shaft of the gear box 1 is connected with the top of the steering column assembly 4 in a transmission way, the input shaft and the output shaft of the gear box 1 are hollow shafts, the gear box 1 adopts primary transmission, and the transmission ratio is 1:1. The torque limiter 11 is provided to limit the transmission torque when the steering system fails, and to prevent the steering motor 3 from failing due to excessive steering resistance. The steering motor 3 drives the gear box 1 to work through the torque limiter 11, the output shaft of the gear box 1 drives the steering column assembly 4 to rotate, and the steering column assembly 4 drives the wheel support frame 5 to rotate, so that the steering motor 3 drives wheels to deflect. The steering column assembly 4 comprises an upper steering column 18 and a lower steering column 19 which are fixedly connected, a steering shaft 17 is fixedly connected to the top of the upper steering column 18, an output shaft of the gear box 1 is in transmission connection with the steering shaft 17, and the top of the wheel support frame 5 is fixedly connected with the lower steering column 19. The combined mounting plate 15 is fixedly provided with a steering sleeve 2 in a penetrating way, the steering shaft 17 is arranged in the steering sleeve 2 in a penetrating way through a bearing 21 and a bushing 20, and the top of the steering shaft 17 is connected with an output shaft of the gear box 1 in a transmission way after penetrating through the steering sleeve 2; the two bushings 20 are respectively connected with the upper end and the lower end of the inner side of the steering sleeve 2, steps are arranged on the bushings 20, and the bushings 20 are clamped on the steering sleeve 2 through the steps; the lower end face of the bushing 20 at the lower end is connected with the upper end face of the bearing 21; the lower end face of the bearing 21 is connected with the wheel support frame 5, and the inner side of the bearing 21 is connected with the steering column assembly 4.

Further preferably, the steering shaft 17 is clamped with an anti-falling limiting device 14, the anti-falling limiting device 14 comprises two symmetrically arranged semi-ring blocks, and the two semi-ring blocks are fixedly connected into a circular structure by bolts; the lower end face of the anti-drop limiting device 14 is abutted with the upper end face of the steering sleeve 2, and when the steering unit is driven to integrally lift, the lower end face of the anti-drop limiting device 14 contacts with the upper end face of the steering sleeve 2, so that the steering column assembly 4, the wheel supporting frame 5 and the wheels are prevented from falling off due to gravity. The steering limiting device comprises two limiting pins 16 which are horizontally and symmetrically arranged and one limiting pin 16 which is vertically arranged; the two horizontally arranged limit pins 16 are fixedly connected with the side walls of the lower steering column 19 respectively, the vertically arranged limit pins 16 are fixedly connected with the bottom of the combined mounting plate 15, and the vertically arranged limit pins 16 can be in contact with the horizontally arranged limit pins 16.

The wheel assembly comprises a wheel hub 7 and a tire 6, wherein the wheel hub 7 is in transmission connection with a wheel hub motor 9, and a brake device 8 is arranged on the wheel hub 7; the bottom of the wheel supporting frame 5 is rotationally connected with the wheel hub 7 through a wheel shaft; the hub motor 9 is arranged in the hub 7 and forms a wheel with the hub 7, the tyre 6 and the brake device 8. The drive steering unit is provided with a running driving force by the in-wheel motor 9 and a steering driving force by the steering motor 3.

An angle sensor 13 is arranged at the top of the upper shell of the gear box 1, the angle sensor 13 is coaxially connected with the top end of an output shaft of the gear box 1, the actual deflection angle of the wheels is measured, the measured value is fed back, and the closed-loop control of the steering angle is realized; the angle sensor 13 is a non-contact Hall angle sensor, and feeds back an angle value in the form of analog voltage; the range of the analog voltage signal output from the angle sensor 13 is 0-5V, and the angle measurement range is 0-180 °.

The working process of the utility model is as follows: the steering motor 3 drives the gear box 1 to work through the torque limiter 11, the output shaft of the gear box 1 drives the steering column assembly 4 to rotate, and the steering column assembly 4 drives the wheel support frame 5 to rotate, so that the steering motor 3 drives wheels to deflect; the angle sensor 13 is connected with the upper end of the output shaft of the gear box 1, and is used for measuring the actual deflection angle of the wheels and feeding back the measured value; the steering column assembly 4 is in fit connection with the steering sleeve 2 through the bearing 21, so that gravity is transmitted to the wheels sequentially through the steering sleeve 2, the bearing 21, the steering column assembly 4 and the wheel support frame 5. The torque limiter 11 can protect the steering motor when the steering system fails; the steering limiting device can limit the rotation angle of the driving steering unit when the steering column assembly 4 rotates.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. An agricultural machine drive steering unit, characterized in that: the steering device comprises a combined mounting plate fixedly connected with a chassis, a steering motor is fixedly mounted on one side of the combined mounting plate, a steering column assembly is connected with the steering motor in a driving manner, and a wheel assembly is connected to the bottom of the steering column assembly through a wheel supporting frame.

2. The agricultural machine drive steering unit according to claim 1, wherein: the steering motor is in transmission connection with a motor shaft, the top of the motor shaft penetrates through the combined mounting plate and then is in transmission connection with a torque limiter, the torque limiter is connected with a gear box through a transmission shaft, and an output shaft of the gear box is in transmission connection with the top of the steering column assembly.

3. The agricultural machine drive steering unit according to claim 2, wherein: the steering column assembly comprises an upper steering column and a lower steering column which are fixedly connected, a steering shaft is fixedly connected to the top of the upper steering column, an output shaft of the gear box is in transmission connection with the steering shaft, and the top of the wheel support frame is fixedly connected with the lower steering column.

4. An agricultural machine drive steering unit according to claim 3, wherein: the steering sleeve is fixedly arranged on the combined mounting plate in a penetrating manner, the steering shaft penetrates through the bearing and the bushing and is arranged in the steering sleeve, and the top of the steering shaft penetrates through the steering sleeve and is in transmission connection with an output shaft of the gear box.

5. The agricultural machine drive steering unit of claim 4, wherein: the steering shaft is clamped with an anti-falling limiting device, the anti-falling limiting device comprises two symmetrically arranged semi-ring blocks, and the two semi-ring blocks are fixedly connected into a circular structure through bolts; the lower end face of the anti-drop limiting device is abutted with the upper end face of the steering sleeve.

6. An agricultural machine drive steering unit according to claim 3, wherein: the steering limiting device comprises two limiting pins which are horizontally and symmetrically arranged and one limiting pin which is vertically arranged; two spacing pins that the level was arranged respectively with lower steering column lateral wall fixed connection, the spacing pin of vertical arrangement with combination mounting panel bottom fixed connection, the spacing pin of vertical arrangement can be with the spacing pin contact of horizontal arrangement.

7. The agricultural machine drive steering unit of claim 4, wherein: the two bushings are respectively connected with the upper end and the lower end of the inner side of the steering sleeve, the bushings are provided with steps, and the bushings are clamped on the steering sleeve through the steps; the lower end face of the bushing at the lower end is connected with the upper end face of the bearing; the lower end face of the bearing is connected with the wheel supporting frame, and the inner side of the bearing is connected with the steering column assembly.

8. The agricultural machine drive steering unit according to claim 1, wherein: the wheel assembly comprises a wheel hub and a tire, wherein the wheel hub is in transmission connection with a wheel hub motor, and a brake device is arranged on the wheel hub; the bottom of the wheel support frame is rotationally connected with the hub through a wheel shaft.

9. The agricultural machine drive steering unit of claim 4, wherein: an angle sensor is installed at the top of the upper shell of the gear box, and the angle sensor is coaxially connected with the top end of an output shaft of the gear box.