Braking device and braking method for mechanically driven roller

Abstract

The present invention discloses a braking device and braking method for a mechanically driven roller. The air bag is controlled by a brake pedal to deliver gas to an air booster pump. When the piston of the air booster pump is subjected to gas pressure, the brake fluid is pushed into the brake for braking. The air pressure sensor transmits the collected air booster pump input pressure signal to the ECU controller. The ECU controller controls the engine to reduce the output torque according to the pressure signal transmitted by the air pressure sensor, so that the brake torque of the brake is greater than the engine output torque, and the engine is turned off for braking. The present invention can solve the braking problem of a mechanically driven roller. When braking, the driver only needs to step on the brake pedal without stepping on the clutch pedal at the same time, so that rapid braking can be achieved, which reduces the braking time and braking distance.

Description

Technical Field

[0001] The invention relates to a braking device and a braking method of a mechanically driven road roller, belonging to the technical field of road rollers. Background Art

[0002] The power and transmission chain of a mechanically driven roller are mainly composed of the engine, gearbox, transmission shaft, drive axle, etc. When the mechanically driven roller is braked, the driver directly steps on the brake pedal, and the brake acts on the wheel side of the drive axle to prevent the drive axle from rotating. However, the transmission chain still transmits power, causing the drive axle to continue rotating, that is, the power cannot be cut off during braking.

[0003] At present, there are two main types of gearboxes for mechanically driven rollers in the industry. One is an electronically controlled gearbox, which is a gearbox that controls the on and off of the solenoid valve through electrical signals, and then switches the gears through hydraulic force, and is driven by gears. The other is a purely mechanical gearbox, that is, a gearbox that switches the gears by manually operating the flexible shaft and is driven by gears. For a mechanically driven roller equipped with this purely mechanical gearbox, when braking, only stepping on the brake pedal cannot achieve power cut-off, which is similar to a manual transmission car; but unlike a manual transmission car, when driving a manual transmission car, the driver steps on the brake pedal, and the engine will be forced to shut down because the braking torque provided by the car brake is much greater than the engine output torque, thereby achieving power cut-off and rapid braking. When a purely mechanically driven roller brakes, the torque provided by the brake is not much different from the engine output torque, which is not enough to force the engine to shut down. The driver must step on the clutch pedal at the same time to cut off the power in order to achieve rapid braking, but asking the driver to step on the brake pedal and the clutch pedal at the same time will increase the braking time and the braking distance. Summary of the invention

[0004] The purpose of the invention is to solve the problem that when a mechanically driven roller is in emergency braking, the brake pedal is directly stepped on and the power cannot be cut off, which easily leads to danger.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A braking device for a mechanically driven roller, comprising a brake pedal and a brake, an air bag, an air booster pump, an air pressure sensor for collecting an input pressure signal of the air booster pump, an ECU controller and an engine;

[0007] The air bag is controlled by the brake pedal to deliver gas to the air booster pump;

[0008] When the piston of the air booster pump is subjected to gas pressure, the brake fluid is pushed into the brake to perform braking;

[0009] The air pressure sensor transmits the collected air booster pump input pressure signal to the ECU controller;

[0010] The ECU controller controls the engine to reduce the output torque according to the pressure signal transmitted by the air pressure sensor, so that the braking torque of the brake is greater than the engine output torque, causing the engine to shut down and brake.

[0011] Furthermore, the output torque of the engine is transmitted to the input end of the drive axle via the gearbox and the transmission shaft.

[0012] Furthermore, a brake disc is provided on the drive axle and rotates synchronously with a wheel side mounting disc on the drive axle.

[0013] Furthermore, the brake is arranged on the drive axle.

[0014] Furthermore, the ECU controller controls the engine to reduce the output torque, and the output torque is transmitted from the engine to the input end of the drive axle via the gearbox and the transmission shaft, so that the input torque of the drive axle is reduced synchronously.

[0015] Furthermore, when the braking torque provided by the brake is greater than the input torque of the drive axle, causing the drive axle to stop rotating, the transmission shaft, the gearbox and the engine stop rotating synchronously, achieving emergency braking.

[0016] A braking method for a mechanically driven roller, wherein the air bag is controlled by a brake pedal to deliver gas to an air booster pump; the piston of the air booster pump is pressurized to push brake fluid into the brake to brake;

[0017] The ECU controller judges the pressure signal at the inlet of the air booster pump collected by the air pressure sensor. When the pressure signal is greater than the preset value, the ECU controller sends a torque reduction signal to the engine, and the engine reduces the output torque. The output torque is transmitted from the engine to the input end of the drive axle through the gearbox and the drive shaft, so that the input torque of the drive axle is reduced synchronously; at this time, the braking torque provided by the brake is greater than the input torque of the drive axle, the drive axle stops rotating, and the drive shaft, gearbox and engine stop rotating synchronously to achieve emergency braking.

[0018] Furthermore, when the pressure signal is not greater than a preset value, the engine maintains its original state.

[0019] Furthermore, the preset value range is: 3 bar -4 bar.

[0020] Furthermore, the engine reduces output torque to 300 N•m -400N•m.

[0021] The beneficial effects achieved by the present invention are:

[0022] This patent discloses a braking device and braking method for a mechanically driven roller, which can solve the braking problem of the mechanically driven roller. When braking, the driver only needs to step on the brake pedal, without stepping on the clutch pedal at the same time, to achieve rapid braking, reducing the braking time and braking distance. The ECU controller determines the braking state based on the different signals collected, outputs a signal to the engine, and controls the engine to reduce the torque. During emergency braking, the engine torque drops significantly, making the braking torque much greater than the engine output torque, forcing the engine to shut down and achieve rapid braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the brake device;

[0024] Figure 2 It is a flow chart of the braking method;

[0025] Figure 3 It is the drive axle and its connection structure;

[0026] In the figure, 1. brake pedal; 2. air booster pump; 3. air bag; 4. mechanical gearbox; 5. transmission shaft; 6. drive axle; 6_1. drive axle input end; 6_2. wheel side mounting plate; 7. brake; 8. brake disc; 9. ECU controller; 10. engine; 11. air pressure sensor. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0028] like Figure 1 and Figure 3 As shown, the brake pedal 1, air booster pump 2, air bag 3, mechanical gearbox 4, drive axle 6, ECU controller 9, and engine 10 are installed at appropriate positions of the mechanical drive roller, and the transmission shaft 5 connects the output end of the mechanical gearbox 4 and the drive axle input end 6_1 of the drive axle 6. The brake disc 8 is welded to the wheel side mounting disc 6_2 as a whole. When there is a rotational torque input to the drive axle input end 6_1, the brake disc 8 rotates synchronously with the wheel side mounting disc 6_2. The brake 7 is fixed to the wheel housing of the drive axle 6 by bolts. When the brake disc 8 and the wheel side mounting disc 6_2 rotate, the brake 7 does not rotate. The air pressure sensor 11 is installed at a suitable position at the inlet of the air booster pump 2, and the value of the input pressure of the air booster pump 2 can be collected.

[0029] When the driver steps on the brake pedal 1, high-pressure gas enters the input end of the air booster pump 2 from the air bag 3 through the pipeline, pushing the piston of the air booster pump 2, and the piston squeezes the high-pressure brake fluid into the brake 7. The brake 7 will clamp and clamp the brake disc 8 to stop it from rotating. The air pressure sensor 11 can collect the pressure of the gas entering the air booster pump 2 from the brake pedal 1 in real time and transmit it to the ECU controller 9. The ECU controller 9 executes the process as shown in the following figure. Figure 2 As shown. The ECU controller collects the brake signal and judges the braking state according to the different signals collected. At the same time, the ECU controller outputs a signal to the engine to control the engine to reduce the torque. During emergency braking, the engine torque drops significantly, making the brake torque much greater than the engine output torque, forcing the engine to shut down and achieve rapid braking.

[0030] Specifically, the ECU controller 9 judges the air pressure signal collected by the air pressure sensor 11. When the air pressure signal is greater than 3.5 Bar, the ECU controller 9 sends a torque reduction signal to the engine 10, and the engine 10 reduces the output torque. The torque is transmitted from the engine 10 to the input end of the drive axle 6 through the gearbox 4 and the transmission shaft 5. At this time, the input torque of the drive axle 6 is also reduced synchronously. At this time, the braking torque provided by the brake 7 is much greater than the input torque of the drive axle 6. The drive axle 6 stops rotating, and the transmission shaft 5, the gearbox 4, and the engine 10 also stop rotating synchronously. The engine 10 is therefore forced to shut down, and the mechanically driven roller achieves emergency braking. When the air pressure signal is not greater than 3.5 Bar, the engine 10 maintains its original state.

[0031] The range of the judgment value of the collected air pressure by the ECU controller 9 is: 3 bar -4 bar, preferably 3.5 bar;

[0032] After the torque reduction, the output torque of the engine 10 is 300 N·m-400 N·m, preferably 350 N·m.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A braking device for a mechanically driven roller, comprising a brake pedal and a brake, characterized in that: It also includes an air bag, an air booster pump, an air pressure sensor for collecting input pressure signals of the air booster pump, an ECU controller and an engine; The air bag is controlled by the brake pedal to deliver gas to the air booster pump; When the piston of the air booster pump is subjected to gas pressure, the brake fluid is pushed into the brake to perform braking; The air pressure sensor transmits the collected air booster pump input pressure signal to the ECU controller; The ECU controller controls the engine to reduce the output torque according to the pressure signal transmitted by the air pressure sensor, so that the braking torque of the brake is greater than the engine output torque, causing the engine to shut down and brake.

2. The braking device of a mechanically driven roller according to claim 1, characterized in that: The output torque of the engine is transmitted to the input end of the drive axle through the gearbox and drive shaft.

3. The braking device of the mechanically driven roller according to claim 2, characterized in that: The driving axle is provided with a brake disc which rotates synchronously with the wheel side mounting disc on the driving axle.

4. The braking device of a mechanically driven roller according to claim 1 or 2, characterized in that: The brake is arranged on the drive axle.

5. The braking device of a mechanically driven roller according to claim 1, characterized in that: The ECU controller controls the engine to reduce the output torque, and the output torque is transmitted from the engine to the input end of the drive axle through the gearbox and drive shaft, so that the input torque of the drive axle is reduced synchronously.

6. The braking device of a mechanically driven road roller according to claim 5, characterized in that: When the braking torque provided by the brake is greater than the input torque of the drive axle, causing the drive axle to stop rotating, the drive shaft, gearbox and engine stop rotating synchronously, achieving emergency braking.

7. A braking method for a mechanically driven roller, characterized in that: The air bag is controlled by the brake pedal to deliver gas to the air booster pump; the piston of the air booster pump is pressurized to push the brake fluid into the brake for braking; The ECU controller judges the pressure signal at the inlet of the air booster pump collected by the air pressure sensor. When the pressure signal is greater than the preset value, the ECU controller sends a torque reduction signal to the engine, and the engine reduces the output torque. The output torque is transmitted from the engine to the input end of the drive axle through the gearbox and the transmission shaft, so that the input torque of the drive axle is reduced synchronously; At this time, the braking torque provided by the brake is greater than the input torque of the drive axle, the drive axle stops rotating, and the drive shaft, gearbox, and engine stop rotating synchronously, achieving emergency braking.

8. The braking method of a mechanically driven roller according to claim 7, characterized in that: When the pressure signal is not greater than the preset value, the engine maintains its original state.

9. The braking method of a mechanically driven roller according to claim 7, characterized in that: The preset value range is: 3bar -4bar.

10. The braking method of a mechanically driven roller according to claim 7, characterized in that: The engine reduces output torque to 300 N•m -400N•m.

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