Electrically driven tire roller auxiliary braking system and control method

Abstract

The application discloses an electrically-driven tire roller auxiliary braking system and a control method thereof. The system comprises: a first end of a brake disc connected to an output shaft of a driving motor through a transmission shaft, a second end of the brake disc connected to an input end of a driving axle, and an output end of the driving axle drivingly connected to a driving wheel; a brake connected to an air valve through a pipeline, the air valve having a charging mode, a neutral mode and a discharging mode; when the air valve is in the charging mode, gas from a gas source is delivered to the brake through the air valve to make brake calipers of the brake clamp the brake disc and output an auxiliary braking force to the brake disc; when the air valve is in the neutral mode, the current auxiliary braking force is maintained; when the air valve is in the discharging mode, the gas in the brake is discharged through the air valve, and the auxiliary braking force output by the brake calipers of the brake to the brake disc is reduced or disappears; the driving motor and the air valve are respectively connected to a controller in signal connection, and the working mode of the air valve is controlled by the controller, so that the auxiliary braking force is adjusted.

Description

Technical Field

[0001] This invention belongs to the field of tire roller technology and relates to an auxiliary braking system and control method for an electric tire roller. Background Technology

[0002] Tire-paddle rollers are mainly used for compacting surface layers such as asphalt concrete, and are also suitable for compacting cement-stabilized soil, infrastructure foundations, and roadbeds. They are indispensable compaction machinery for the construction of airports and highways. Because asphalt surface layer construction requires the combined operation of multiple pieces of equipment such as pavers, asphalt transport vehicles, double-drum rollers, and tire-paddle rollers, the environment around the rollers is relatively complex during construction, and there are many auxiliary construction personnel on the road surface, posing certain safety risks.

[0003] Therefore, the reliability of the braking system, the overall braking distance, and the smoothness of braking have a significant impact on the safety of road roller construction and the smoothness of the road surface. Summary of the Invention

[0004] Objective: In view of at least one of the above technical problems, the present invention provides an auxiliary braking system and control method for an electric drive tire roller, which serves as an auxiliary braking system in the event of motor brake failure, and can also make vehicle braking smoother by controlling the braking force.

[0005] Technical solution: To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] In one aspect, an auxiliary braking system for an electric tire roller is provided, comprising a drive motor, a drive shaft, a brake, a brake disc, a drive axle, a drive wheel, a controller, and an air valve;

[0007] The output shaft of the drive motor is connected to the first end of the brake disc via a transmission shaft, the second end of the brake disc is connected to the input end of the drive axle, and the output end of the drive axle drives the drive wheel.

[0008] The brake is connected to an air valve via a pipeline. The air valve has at least an inflation mode, a neutral position mode, and a deflation mode. When the air valve is in the inflation mode, gas from the air source is supplied to the brake through the air valve, causing the brake caliper to clamp the brake disc and output auxiliary braking force to the brake disc. When the air valve is in the neutral position mode, the current auxiliary braking force is maintained. When the air valve is in the deflation mode, the gas in the brake is discharged through the air valve, and the auxiliary braking force output by the brake caliper to the brake disc is reduced or disappears.

[0009] The drive motor and air valve are respectively connected to the controller signal.

[0010] Secondly, a method for controlling the auxiliary braking of an electrically driven tire roller is provided, the control method comprising:

[0011] When the drive motor brake fails and stops outputting braking torque, or when the braking torque output by the drive motor is insufficient;

[0012] The controller acquires the target speed and the actual speed of the drive motor, calculates the actual reverse acceleration based on the actual speed of the drive motor, calculates the target reverse acceleration based on the target speed and the actual speed of the drive motor, and determines the range of the target reverse acceleration based on the error.

[0013] In response to the actual reverse acceleration being less than the lower limit of the target reverse acceleration, the controller issues a command to open the air valve to the inflation mode to inflate the brake. The brake caliper clamps the brake disc and outputs auxiliary braking force to the brake disc. The brake disc converts the braking force into braking torque and transmits it to the drive wheel through the drive axle, causing the road roller to decelerate and brake.

[0014] In some embodiments, the electric drive tire roller auxiliary braking control method further includes: during auxiliary braking, in response to the actual reverse acceleration being within the target reverse acceleration range, the controller issues a command to control the air valve to switch to the neutral position mode, neither inflating nor deflating, thereby maintaining the current auxiliary braking force.

[0015] In some embodiments, the auxiliary braking control method for the electric drive tire roller further includes: during the auxiliary braking process, in response to the actual reverse acceleration being greater than the upper limit of the target reverse acceleration, the controller issues a command to control the air valve to switch to the air release mode, thereby releasing the gas in the brake, reducing or eliminating the force of the brake caliper clamping the brake disc, reducing or eliminating the auxiliary braking force output to the brake disc, and reducing or eliminating the braking torque transmitted to the drive wheel through the drive axle, thereby reducing the power of the roller.

[0016] Thirdly, an auxiliary braking system for an electric tire roller is provided, wherein the controller includes a memory and a processor, the memory being used to store instructions for controlling the processor to perform operations to execute the above-described auxiliary braking control method for an electric tire roller.

[0017] Fourthly, an electric tire roller is provided, including the above-mentioned electric tire roller auxiliary braking system.

[0018] Beneficial Effects: The auxiliary braking system and control method for an electric-driven tire roller provided by this invention can serve as auxiliary braking in case of motor brake failure, and can also make vehicle braking smoother by controlling the braking force, avoiding damage to the road surface during compaction. By adding a brake to the output end of the drive motor, the machine controller adjusts the braking force in real time, thereby increasing the reliability of the braking system, ensuring construction safety, making braking force control smoother, and improving the flatness of the compacted road surface. It has the following advantages:

[0019] 1. In the event of motor failure or brake malfunction, the brake can replace the motor brake, ensuring overall braking and improving operational safety. Simultaneously, it avoids the use and damage of the parking brake, extending the service life of the drive axle and parking brake.

[0020] 2. When the road roller brakes downhill, when the speed decreases to a certain value, the motor braking torque decreases, the controller outputs a command to open the air valve to a suitable degree, and the brake outputs appropriate braking force to stop the road roller, thus improving the safety of the road roller when operating on slopes.

[0021] 3. When the road roller brakes at high speed or on steep slopes, if the controller detects that the braking torque of the drive motor is insufficient, the brake can be used as a supplement to provide additional braking force that can be adjusted in real time. This allows the road roller to obtain a constant and appropriate braking force, ensuring a smooth braking process, preventing damage to the road surface, and improving the smoothness of the road surface. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a drive system structure according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a drive system according to an embodiment of the present invention.

[0024] In the diagram: 1. Drive motor, 2. Drive shaft, 3. Brake, 4. Brake disc, 5. Brake bracket, 6. Drive axle, 7. Drive wheel, 8. Controller, 9. Air valve. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and should not be used to limit the scope of protection of the present invention.

[0026] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] In existing technical solutions, the transmission system of a road roller is as follows: the drive motor is directly fixed to the drive axle housing, and the output shaft of the drive motor is connected to the input shaft of the drive axle via a spline to transmit torque. The machine controller communicates with the drive motor (motor controller) to detect and control the drive motor speed in real time. When the machine needs to brake, the machine controller reads the information from the machine speed control handle, calculates the target speed of the machine, and converts it into the target motor speed; through communication between the machine controller and the drive motor (motor controller), the drive motor speed is adjusted, and the machine braking is achieved through motor braking.

[0029] The drive axle has a parking brake inside. When the road roller stops, the parking brake can be closed by controlling the parking brake button to brake the whole machine.

[0030] In an emergency, the parking brake can be used as an emergency brake. When the drive motor fails, the machine cannot be braked by the drive motor. At this time, pressing the parking brake button will close the parking brake in the drive axle, and the machine will be braked in an emergency.

[0031] The above technical solution has the following shortcomings:

[0032] 1. If the motor malfunctions and the motor brake fails, the driver needs to react quickly and press the emergency brake button, which wastes time and increases the overall braking distance. Furthermore, parking brakes are generally only used for braking at zero speed and are not suitable for dynamic friction braking. Their use in emergency braking is limited, significantly reducing their lifespan and reliability. Parking brakes are typically normally closed; using them for emergency braking puts a significant impact on the transmission system, potentially affecting its lifespan and providing a poor driving experience.

[0033] 2. During downhill driving, the roller can be slowed down by using motor braking. However, as the motor speed decreases, the braking force also decreases, making it difficult for the roller to brake at low speeds, or resulting in a longer braking distance. In this case, emergency braking is still required to stop the roller, and the lifespan of the parking brake is still affected.

[0034] 3. Due to the characteristics of the motor, the braking capacity of the motor is limited. This means that the road roller may not be able to achieve a constant and appropriate deceleration under conditions such as high speed or steep slope. As a result, the road roller cannot achieve smooth braking, which affects the smoothness of the asphalt pavement.

[0035] Therefore, this invention proposes an auxiliary braking system and control method for an electric-driven tire roller. An air valve, brake, and brake disc are added to the original route for auxiliary braking. This serves as supplementary braking in case of motor brake failure and also allows for smoother vehicle braking by controlling the braking force, preventing damage to the road surface during compaction. By adding a brake to the output of the drive motor, the machine controller adjusts the braking force in real time, thereby increasing the reliability of the braking system, ensuring construction safety, achieving smoother braking force control, and improving the flatness of the compacted road surface.

[0036] Example 1: This example provides an auxiliary braking system for an electric tire roller, including a drive motor 1, a transmission shaft 2, a brake 3, a brake disc 4, a drive axle 6, a drive wheel 7, a controller 8, and an air valve 9;

[0037] The output shaft of the drive motor 1 is connected to the first end of the brake disc 4 via the transmission shaft 2. The second end of the brake disc 4 is connected to the input end of the drive axle 6. The output end of the drive axle 6 drives the drive wheel 7.

[0038] The brake 3 is connected to the air valve 9 via a pipeline. The air valve has at least an inflation mode, a neutral position mode, and a deflation mode. When the air valve is in the inflation mode, the gas from the air source is supplied to the brake 3 through the air valve 9, so that the brake caliper of the brake 3 clamps the brake disc and outputs auxiliary braking force to the brake disc. When the air valve is in the neutral position mode, the current auxiliary braking force is maintained. When the air valve is in the deflation mode, the gas in the brake 3 is discharged through the air valve 9, and the auxiliary braking force output by the brake caliper of the brake 3 to the brake disc is reduced or disappears.

[0039] The drive motor 1 and the air valve 9 are respectively connected to the controller 8 via signals. In this application, the controller 8 controls the working mode of the air valve 9, thereby realizing the adjustment of the auxiliary braking force.

[0040] In this embodiment, the electric drive tire roller control method further includes a brake bracket 5, which is fixed to the drive axle 6. Furthermore, the brake disc 4 is mounted on the brake bracket 5.

[0041] In this embodiment, the brake 3 is normally open.

[0042] In this embodiment, the braking force output by the brake to the brake disc is in a certain proportion to the gas inside the brake 3.

[0043] In this embodiment, the transmission shaft 2, brake disc 4, drive axle 6 and the output shaft of drive motor 1 are coaxially mounted.

[0044] It should be noted that drive motor 1, fixed to the machine body, is connected to the battery (or generator) power source via a high-voltage line. It receives electrical energy from the entire machine, converts it into mechanical energy, and outputs driving torque to drive the wheels. The electrical energy of the entire machine may come from the battery or generator, etc. At the same time, drive motor 1 is connected to and communicates with controller 8 and is controlled by controller 8.

[0045] When braking is required, drive motor 1 outputs reverse torque to brake the road roller. At this time, the drive motor turns into a generator, absorbing the kinetic energy from the whole machine (the inertial torque of the wheels) and converting it into electrical energy, which is then output to energy storage devices such as batteries.

[0046] The drive shaft 2 is connected to the drive motor 1 at one end and the brake disc 4 at the other end. It receives the torque from the drive motor and transmits it to the brake disc. At the same time, the drive shaft can compensate for the positional deviation between the drive motor and the drive axle caused by manufacturing errors of structural components.

[0047] Brake 3, mounted on brake bracket 5, is connected to air valve 9 via a pipeline, receiving high-pressure air from the air valve. When high-pressure air from the air valve is injected into the brake, the brake caliper can output clamping force to the brake disc, and the clamping force is proportional to the gas pressure. When the air valve is in the venting mode, the high-pressure air inside the brake can be discharged to the atmosphere through the air valve, and the brake caliper is released.

[0048] The brake disc 4 is connected at both ends to the drive shaft 2 and the input flange of the drive axle 6, respectively, to transmit torque to them. At the same time, it can receive the clamping force from the brake 3, convert it into braking torque, and output it to the drive axle 6.

[0049] The drive axle 6 is connected to the machine body, supports the weight of the entire machine, and is also connected to the brake disc 4, receiving torque from the brake disc and transmitting it to the wheels, enabling the machine to drive or brake to stop.

[0050] The drive wheel 7, typically composed of multiple tires, is connected to the drive axle 6 and supports the drive axle. It receives torque from the drive axle, enabling the road roller to move or brake.

[0051] The controller 8 is installed inside the machine, such as in an electrical cabinet. It is connected to the drive motor 1 (drive motor controller) and the air valve 9 via electrical wiring, communicating in real time to monitor and control parameters such as drive motor torque, speed, voltage, and current. Simultaneously, the controller is also connected and communicates with other electrical components such as the speed control handle and air valves via electrical wiring.

[0052] Air valve 9, installed inside the machine body, is connected to and communicates with the controller via electrical wiring. It connects to the air source (air pump or air tank) and brake 3 via air pipes, transmitting high-pressure air. The air valve has three states according to the controller's instructions: in inflation mode, the air valve receives high-pressure gas from the air source and transmits it to the brake, causing it to engage; in deflation mode, the air valve releases the high-pressure gas from the brake to the atmosphere; in neutral mode, the air valve is in the middle position, neither inflating nor deflation. Simultaneously, the air valve can be connected to an external air pressure sensor to measure the air pressure at the brake's output end and transmit this value to the controller. Based on the received air pressure value, the controller determines whether the air valve should be in inflation, deflation, or neutral mode, adjusting the brake air pressure accordingly, thereby regulating the brake's output braking force.

[0053] Under normal circumstances, when the road roller is traveling at a certain speed, the operator will adjust the speed control lever to the designated position.

[0054] At this time, controller 8 reads the handle information, obtains the driving speed requested by the handle, and converts it into the target speed of the drive motor.

[0055] The drive motor 1 runs at a certain speed, receives current from the power source (battery or generator), converts electrical energy into mechanical energy, and outputs torque to drive the transmission shaft and drive axle, enabling the whole machine to move.

[0056] At the same time, the controller 8 reads the driving motor's operating information, obtains the actual speed of the driving motor, and compares it with the target speed of the driving motor.

[0057] When there is a discrepancy in the comparison results, for example, if the actual speed of the drive motor is lower than the target speed, the controller will issue a command to increase the current of the drive motor, thereby increasing the output torque or speed of the drive motor. The reverse is also true.

[0058] The drive motor is controlled by the controller to obtain appropriate voltage and current, and maintains the specified speed. The whole machine runs at the specified speed under the drive motor.

[0059] When the road roller needs to brake, the operator will return the speed control lever to the center or adjust it to the low speed position.

[0060] At this time, the controller 8 reads the handle information, obtains the driving speed requested by the handle, converts it into the target speed of the drive motor, sends a deceleration command to the drive motor, and executes motor braking.

[0061] At this point, the drive motor transforms into a generator, absorbing the kinetic energy from the entire machine (the inertial torque of the wheels) and converting it into electrical energy. It outputs a reverse current and supplies this electrical energy to storage devices such as batteries. This reverse current causes the drive motor to output a reverse torque, which is transmitted to the drive axle 6 via the drive shaft 2 and brake disc 4, thus braking the roller. By varying the current, the magnitude of the reverse torque of the drive motor can be adjusted, allowing the roller to obtain appropriate braking force and reverse acceleration.

[0062] However, when the motor fails, the drive motor stops outputting braking torque; or due to the low speed of the drive motor, the motor efficiency decreases and the braking torque decreases; or when the road roller is braking on a steep slope, or when the road roller is braking at high speed on flat ground, the motor braking torque may be insufficient.

[0063] Example 2: This example provides an auxiliary braking control method for an electrically driven tire roller, the control method including:

[0064] When the drive motor brake fails and stops outputting braking torque, or when the braking torque output by the drive motor is insufficient;

[0065] The controller 8 acquires the target speed and the actual speed of the drive motor, calculates the actual reverse acceleration based on the actual speed of the drive motor, calculates the target reverse acceleration based on the target speed and the actual speed of the drive motor, and determines the range of the target reverse acceleration based on the error.

[0066] In response to the actual reverse acceleration being less than the lower limit of the target reverse acceleration, the controller issues a command to open the air valve 9 to the inflation mode to inflate the brake. The brake caliper clamps the brake disc and outputs auxiliary braking force to the brake disc. The brake disc converts the braking force into braking torque and transmits it to the drive wheel 7 through the drive axle, causing the road roller to decelerate and brake.

[0067] During assisted braking, in response to the actual reverse acceleration being within the target reverse acceleration range, the controller issues a command to switch the air valve to the neutral position mode, neither inflating nor deflating, thereby maintaining the current assisted braking force.

[0068] During the auxiliary braking process, in response to the actual reverse acceleration being greater than the upper limit of the target reverse acceleration, the controller issues a command to control the air valve to switch to the air release mode, thereby releasing the gas in the brake. The force of the brake caliper clamping the brake disc decreases or disappears, the auxiliary braking force output to the brake disc decreases or disappears, and the braking torque transmitted to the drive wheel 7 through the drive axle decreases or disappears, thus reducing the power of the road roller mechanism.

[0069] In this embodiment, when the motor malfunctions, it stops outputting braking torque; or due to low motor speed, motor efficiency decreases, resulting in reduced braking torque; or during braking operations on steep slopes or high-speed flat terrain, the motor's braking torque may be insufficient. At this time, the controller 8 reads the handle information, obtains the requested travel speed, and calculates, based on the monitored motor speed, that the roller is not receiving adequate reverse acceleration. The controller sends a command to the air valve, controlling it to open into inflation mode. Air valve 9 opens into inflation mode, outputting high-pressure air from the machine's air source to the brake. The brake 3 receives the high-pressure air from the air valve, the brake caliper clamps the brake disc, and outputs braking force to the brake disc. The brake disc 4, subjected to the clamping force of the brake, is converted into braking torque and output to the drive axle. The drive axle 6, receiving the braking torque from the brake disc, transmits it to the tires, converting it into the overall braking force of the machine, causing the roller to decelerate and brake.

[0070] Controller 8 reads the motor speed and the vehicle speed requested by the handle in real time. When the reverse acceleration of the entire machine is too large, it indicates that the braking force exceeds the required range. The controller sends a command to the air valve, controlling the air valve to open into the venting mode. Air valve 9 opens into the venting mode, releasing the high-pressure air in the brake to the atmosphere. When the high-pressure air in brake 3 is released to the air valve, the force of the brake caliper clamping the brake disc decreases or disappears, and the braking force output to the brake disc decreases or disappears. The drive axle receives the reduced or eliminated torque output from the brake disc, and the overall braking force decreases.

[0071] In some embodiments, the controller can also read the air pressure value of the air pressure sensor at the air valve to determine whether the air valve is in the inflation, deflation or neutral position mode, as feedback information for air valve control to ensure the accuracy of control.

[0072] Example 3: This example provides an auxiliary braking system for an electric tire roller. The controller includes a memory and a processor. The memory stores instructions, which are used to control the processor to perform operations to execute the auxiliary braking control method for the electric tire roller according to Example 2.

[0073] The auxiliary braking system provided in this application serves as a supplement to the motor braking, enabling the entire machine to obtain stable and ideal braking force.

[0074] Example 4: This example provides an electric tire roller, including the electric tire roller auxiliary braking system described in the first or third aspect.

[0075] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0076] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0077] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0078] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An auxiliary braking system for an electrically driven tire roller, characterized in that, It includes a drive motor, a transmission shaft, a brake, a brake disc, a drive axle, a drive wheel, a controller, and an air valve; the output shaft of the drive motor is connected to the first end of the brake disc via the transmission shaft, the second end of the brake disc is connected to the input end of the drive axle, and the output end of the drive axle drives the drive wheel. The brake is connected to an air valve via a pipeline. The air valve has an inflation mode, a neutral position mode, and a deflation mode. When the air valve is in the inflation mode, gas from the air source is supplied to the brake through the air valve, causing the brake caliper to clamp the brake disc and output auxiliary braking force to the brake disc. When the air valve is in the neutral position mode, the current auxiliary braking force is maintained. When the air valve is in the deflation mode, the gas in the brake is discharged through the air valve, and the auxiliary braking force output by the brake caliper to the brake disc is reduced or disappears. The drive motor and air valve are respectively connected to the controller signal; The control method of the system includes: When the drive motor brake fails and stops outputting braking torque, or when the drive motor outputs insufficient braking torque; the controller obtains the target speed and the actual speed of the drive motor, calculates the actual reverse acceleration based on the actual speed of the drive motor, calculates the target reverse acceleration based on the target speed and the actual speed of the drive motor, and determines the range of the target reverse acceleration based on the error; In response to the actual reverse acceleration being less than the lower limit of the target reverse acceleration, the controller sends a command to open the air valve to the inflation mode to inflate the brake. The brake caliper clamps the brake disc and outputs auxiliary braking force to the brake disc. The brake disc converts the braking force into braking torque and transmits it to the drive wheel through the drive axle, causing the road roller to decelerate and brake. In response to the actual reverse acceleration exceeding the upper limit of the target reverse acceleration, the controller issues a command to switch the air valve to the venting mode, venting the air in the brake, reducing or eliminating the force of the brake caliper clamping the brake disc, reducing or eliminating the auxiliary braking force output to the brake disc, and reducing or eliminating the braking torque transmitted to the drive wheel through the drive axle, thereby reducing the power of the road roller.

2. The auxiliary braking system for an electric-driven tire roller according to claim 1, characterized in that, It also includes a brake bracket, which is fixed to the drive axle.

3. The auxiliary braking system for an electric-driven tire roller according to claim 2, characterized in that, The brake disc is mounted on the brake bracket.

4. The auxiliary braking system for an electric-driven tire roller according to claim 1, characterized in that, The brake is normally open.

5. The auxiliary braking system for an electric-driven tire roller according to claim 1, characterized in that, The braking force output by the brake to the brake disc is in a certain proportion to the gas inside the brake.

6. The auxiliary braking system for an electric-driven tire roller according to claim 1, characterized in that, During assisted braking, in response to the actual reverse acceleration being within the target reverse acceleration range, the controller issues a command to switch the air valve to the neutral position mode, neither inflating nor deflating, thereby maintaining the current assisted braking force.

7. An electrically driven tire roller, characterized in that, Includes the electric drive tire roller auxiliary braking system as described in any one of claims 1 to 6.

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