CN-120096529-B - Auxiliary braking system of electric driven pneumatic tire roller and control method

CN120096529BCN 120096529 BCN120096529 BCN 120096529BCN-120096529-B

Abstract

The invention discloses an auxiliary braking system of an electric driven pneumatic road roller and a control method, wherein an output shaft of a driving motor is connected to a first end of a brake disc through a transmission shaft, a second end of the brake disc is connected with an input end of a driving axle, an output end of the driving axle is in driving connection with a driving wheel, a brake is connected with an air valve through a pipeline, the air valve is in an inflation mode, a middle position mode and a deflation mode, when the air valve is in the inflation mode, air of an air source is conveyed to the brake through the air valve, so that a brake caliper of the brake clamps the brake disc to output auxiliary braking force, when the air valve is in the middle position mode, the current auxiliary braking force is kept, when the air valve is in the deflation mode, the air in the brake is discharged through the air valve, the auxiliary braking force output by the brake caliper of the brake is reduced or eliminated, the driving motor and the air valve are respectively connected with a controller through signals, and the working mode of the air valve is controlled by the controller, so that the adjustment of the auxiliary braking force is realized.

Inventors

Zhang shichuang
Pang Zihui
YAN JUNHUA
JIANG KUIFENG
Qi Feiyue
SHANG TAOTAO
HE YUQI

Assignees

徐工集团工程机械股份有限公司道路机械分公司

Dates

Publication Date: 20260508
Application Date: 20250306

Claims (7)

1. The auxiliary braking system of the electric driven pneumatic tire roller is characterized by comprising a driving motor, a transmission shaft, a brake disc, a driving axle, a driving wheel, a controller and an air valve, wherein an output shaft of the driving motor is connected to a first end of the brake disc through the transmission shaft, a second end of the brake disc is connected with an input end of the driving axle, and an output end of the driving axle is in driving connection with the driving wheel; The brake is connected with a gas valve through a pipeline, the gas valve is provided with an inflation mode, a middle position mode and a deflation mode, when the gas valve is in the inflation mode, gas of a gas source is conveyed to the brake through the gas valve so that a brake caliper of the brake clamps a brake disc and outputs auxiliary braking force to the brake disc; the control method of the system comprises the following steps: The controller obtains the target rotating speed of the driving motor and the actual rotating speed of the driving motor, calculates the actual reverse acceleration according to the actual rotating speed of the driving motor, calculates the target reverse acceleration according to the target rotating speed of the driving motor and the actual rotating speed of the driving motor, and determines the target reverse acceleration range according to the error; responding to the fact that the actual reverse acceleration is smaller than the lower limit value of the target reverse acceleration, the controller sends out instructions to control the air valve to be opened to an air charging mode to charge air to the brake, a brake caliper of the brake clamps a brake disc, auxiliary braking force is output to the brake disc, the brake disc converts the braking force into braking torque, and the braking torque is transmitted to the driving wheels through a driving axle to enable the road roller to brake in a decelerating mode; And in response to the fact that the actual reverse acceleration is larger than the upper limit value of the target reverse acceleration, the controller sends out instructions to control the air valve to switch to the air release mode, air in the brake is discharged, the force of the brake caliper clamping the brake disc is reduced or eliminated, the auxiliary braking force output to the brake disc is reduced or eliminated, the braking torque transmitted to the driving wheels through the driving axle is reduced or eliminated, and the braking force of the road roller is reduced.
2. The auxiliary brake system of an electrically driven pneumatic tire roller of claim 1, further comprising a brake bracket secured to the drive axle.
3. An electrically driven pneumatic tire roller auxiliary braking system according to claim 2, wherein the brake disc is mounted on the brake support.
4. The auxiliary brake system of an electrically driven pneumatic tire roller of claim 1, wherein the brake is normally open.
5. The auxiliary brake system of an electrically driven pneumatic tire roller as in claim 1, wherein the brake force output by the brake to the brake disc is proportional to the gas in the brake.
6. The auxiliary braking system of electrically driven pneumatic tire road roller of claim 1, wherein during auxiliary braking, in response to actual reverse acceleration being within a target reverse acceleration range, the controller instructs the air valve to switch to neutral mode, neither inflating nor deflating, thereby maintaining a current auxiliary braking force.
7. An electrically driven pneumatic tyre roller comprising an auxiliary braking system according to any one of claims 1 to 6.

Description

Auxiliary braking system of electric driven pneumatic tire roller and control method Technical Field The invention belongs to the technical field of pneumatic tires, and relates to an auxiliary braking system of an electrically driven pneumatic tire and a control method. Background The tyre roller is mainly used for compacting surface layers such as asphalt concrete and the like, is also suitable for compacting cement stabilized soil, foundation and roadbed, and is an indispensable compacting machine for constructing airports and highways. Because asphalt pavement construction requires the combined operation of a paver, an asphalt transfer vehicle, a double-steel-wheel road roller, a tyre road roller and other various devices, the surrounding environment of the road roller is complex in the construction process, and the auxiliary construction personnel on the road surface are more, so that a certain safety risk exists. Therefore, the reliability of the braking system, the braking distance of the whole machine and the braking stability have great influence on the construction safety of the road roller and the road surface evenness. Disclosure of Invention In view of at least one of the technical problems, the invention provides an auxiliary braking system and a control method of an electric driven pneumatic tire roller, which are used for auxiliary braking under the condition of motor braking failure, and can enable vehicle braking to be smoother by controlling braking force. The technical scheme adopted by the invention is as follows: In a first aspect, an auxiliary braking system of an electrically driven pneumatic tire roller is provided, comprising a driving motor, a transmission shaft, a brake disc, a driving axle, a driving wheel, a controller and an air valve; an output shaft of the driving motor is connected to a first end of a brake disc through a transmission shaft, a second end of the brake disc is connected with an input end of a driving axle, and an output end of the driving axle is in driving connection with a driving wheel; The brake is connected with an air valve through a pipeline, and the air valve at least has an inflation mode, a neutral mode and a deflation mode; when the air valve is in the air charging mode, the air of the air source is conveyed to the brake through the air valve so that the brake caliper of the brake clamps the brake disc and outputs auxiliary braking force to the brake disc; the driving motor and the air valve are respectively connected with the controller through signals. In a second aspect, there is provided a method of auxiliary brake control for an electrically driven pneumatic tyre roller, the method comprising: when the braking failure of the driving motor stops outputting the braking torque or the braking torque output by the driving motor is insufficient; the controller obtains a target rotating speed of the driving motor and an actual rotating speed of the driving motor, calculates actual reverse acceleration according to the actual rotating speed of the driving motor, calculates target reverse acceleration according to the target rotating speed of the driving motor and the actual rotating speed of the driving motor, and determines a target reverse acceleration range according to the error; And the controller sends out instructions to control the air valve to be opened to an air charging mode to charge air to the brake, a brake caliper of the brake clamps a brake disc, auxiliary braking force is output to the brake disc, the brake disc converts the braking force into braking torque and transmits the braking torque to the driving wheels through the driving axle, and the road roller is braked in a decelerating way. In some embodiments, the auxiliary braking control method of the electrically driven pneumatic road roller further comprises the step that in the auxiliary braking process, in response to the actual reverse acceleration being in the target reverse acceleration range, the controller sends out instructions to control the air valve to switch to the neutral mode, and the air valve is neither inflated nor deflated, so that the current auxiliary braking force is maintained. In some embodiments, the auxiliary braking control method of the electrically driven pneumatic road roller further comprises the steps that in the auxiliary braking process, in response to the fact that the actual reverse acceleration is larger than the upper limit value of the target reverse acceleration, the controller sends out instructions to control the air valve to switch to the air release mode, air in the brake is discharged, the force of the brake caliper clamping the brake disc is reduced or eliminated, the auxiliary braking force output to the brake disc is reduced or eliminated, the braking torque transmitted to the driving wheels through the driving axle is reduced or eliminated, and the braking force of the road roller is reduced. In a third aspect, there is provided an e