CN210162067U - Braking device of mechanical driving road roller - Google Patents
Braking device of mechanical driving road roller Download PDFInfo
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- CN210162067U CN210162067U CN201920741446.8U CN201920741446U CN210162067U CN 210162067 U CN210162067 U CN 210162067U CN 201920741446 U CN201920741446 U CN 201920741446U CN 210162067 U CN210162067 U CN 210162067U
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Abstract
The utility model discloses a braking device of a mechanical driving road roller, wherein an air bag is controlled by a brake pedal to convey air to an air booster pump; when the piston of the air booster pump is under the pressure of gas, the brake fluid is pushed into the brake to brake; the air pressure sensor transmits the acquired 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 larger than the output torque of the engine, and the engine is stalled and braked. This novel can solve mechanical drive road roller braking problem, the driver only need step on brake pedal during the braking, need not step on the separation and reunion footboard simultaneously, just can realize quick braking, has reduced braking time and braking distance.
Description
Technical Field
The utility model relates to a arresting gear of mechanical drive road roller belongs to road roller technical field.
Background
The power and transmission chain of the mechanical driving road roller mainly comprises an engine, a gearbox, a transmission shaft, a drive axle and other parts. When the mechanical driving road roller brakes, a driver directly steps on a brake pedal, the brake acts on the wheel edge of the drive axle at the moment to prevent the drive axle from rotating, but the transmission chain still transmits power at the moment to enable the drive axle to continue rotating, namely the power cannot be cut off during braking.
In the industry, two main types of gearboxes for mechanically driving the road roller are provided, wherein one gearbox is an electric control gearbox, and the electric control gearbox is a gearbox which controls the on and off of an electromagnetic valve through an electric signal, further performs gear switching through hydraulic power and transmits through a gear. Another is a purely mechanical gearbox, namely: the flexible shaft is manually operated to realize gear switching, and the gear box is driven by a gear. When the mechanical driving road roller provided with the pure mechanical gearbox is braked, the power can not be cut off only by stepping down a brake pedal, and the phenomenon is similar to a manual transmission automobile; however, different from a manual transmission automobile, when the manual transmission automobile is driven, a driver steps on a brake pedal, the brake torque provided by an automobile brake is far larger than the output torque of an engine, the engine is forced to stall, power is cut off, and then rapid braking is realized.
SUMMERY OF THE UTILITY MODEL
The novel purpose of this is that solve mechanical drive road roller when emergency braking, directly step on brake pedal, can't cut off power, takes place this problem of danger easily.
In order to solve the technical problem, the technical scheme adopted by the novel method is as follows:
a braking device of a mechanical driving road roller comprises a brake pedal, 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;
the air bag is controlled by a brake pedal to convey air to the air boosting pump;
when the piston of the air booster pump is under the pressure of gas, the brake fluid is pushed into the brake to brake;
the air pressure sensor transmits the acquired 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 larger than the output torque of the engine, and the engine is stalled and braked.
Further, the output torque of the engine is transmitted to the input end of the drive axle through the gearbox and the transmission shaft.
Furthermore, a brake disc which rotates synchronously with the wheel edge mounting disc on the drive axle is arranged on the drive axle.
Further, a brake is provided on the transaxle.
Further, the ECU controller controls the engine to reduce output torque, and the output torque is transmitted to the input end of the drive axle through the transmission case and the transmission shaft by the engine, so that the input torque of the drive axle is synchronously reduced.
Further, when the brake torque provided by the brake is larger than the input torque of the drive axle to stop the rotation of the drive axle, the transmission shaft, the gearbox and the engine synchronously stop rotating, and emergency braking is realized.
A braking method of a mechanical driving road roller is characterized in that an air bag is controlled by a brake pedal to convey air to an air boosting pump; the piston of the air booster pump is pressed to push the brake fluid into the brake for braking;
the ECU controller judges a pressure signal at the inlet of the air booster pump, which is acquired by the air pressure sensor, and when the pressure signal is greater than a preset value, the ECU controller sends a torque reduction signal to the engine, the engine reduces the output torque, and the output torque is transmitted to the input end of the drive axle through the transmission case and the transmission shaft by the engine, so that the input torque of the drive axle is synchronously reduced; at this time, the brake torque provided by the brake is larger than the input torque of the drive axle, the drive axle stops rotating, and the transmission shaft, the gearbox and the engine synchronously stop rotating, so that emergency braking is realized.
Further, when the pressure signal is not greater than the preset value, the engine maintains the original state.
Further, the range of preset values is: 3 bar-4 bar.
Further, the engine reduction output torque is 300 N.m-400 N.m.
This novel beneficial effect who reaches:
the patent discloses a arresting gear and braking method of mechanical drive road roller can solve the mechanical drive road roller braking problem, and the driver only need step on the brake pedal during braking, need not step on the separation and reunion footboard simultaneously, just can realize quick braking, has reduced braking time and braking distance. The ECU controller judges the braking state according to the collected different signals, outputs signals to the engine, controls the engine to reduce the torque, greatly reduces the engine torque during emergency braking, enables the braking torque to be far greater than the engine output torque, forces the engine to stall, and realizes rapid braking.
Drawings
FIG. 1 is a schematic view of a braking device;
FIG. 2 is a flow chart of a braking method;
FIG. 3 is a drive axle and its connection;
in the figure, 1, a brake pedal; 2. an air booster pump; 3. air bags; 4. a mechanical gearbox; 5. a drive shaft; 6. a drive axle; 6_1, a drive axle input end; 6_2, mounting a disc at the wheel edge; 7. a brake; 8. a brake disc; 9. an ECU controller; 10. an engine; 11. an air pressure sensor.
Detailed Description
The present invention is further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solution of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 and 3, a brake pedal 1, an air booster pump 2, an air bag 3, a mechanical gearbox 4, a drive axle 6, an ECU controller 9 and an engine 10 are installed at appropriate positions of the mechanically-driven road roller, and a transmission shaft 5 is connected with an output end of the mechanical gearbox 4 and a drive axle input end 6_1 of the drive axle 6. The brake disc 8 and the wheel edge mounting disc 6_2 are welded into a whole, and when the input end 6_1 of the drive axle has input of rotation torque, the brake disc 8 and the wheel edge mounting disc 6_2 rotate synchronously. The brake 7 is fixed on the wheel shell of the drive axle 6 through bolts, and when the brake disc 8 and the wheel edge mounting disc 6_2 rotate, the brake 7 does not rotate. The air pressure sensor 11 is installed at a proper position at the inlet of the air booster pump 2, and can acquire the numerical value of the input pressure of the air booster pump 2.
When a 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 a pipeline to push the piston of the air booster pump 2, the piston squeezes high-pressure brake fluid into the brake 7, and the brake 7 can clamp and clamp the brake disc 8 to stop rotating. The air pressure sensor 11 can collect the pressure of air entering the air booster pump 2 from the brake pedal 1 in real time and transmit the pressure to the ECU controller 9, and the ECU controller 9 executes the flow chart shown in fig. 2. The ECU controller collects braking signals, judges and judges braking states according to the collected different signals, meanwhile, the ECU controller outputs signals to the engine to control the engine to reduce torque, and during emergency braking, the engine torsion machine is greatly reduced to enable the braking torque to be far larger than the output torque of the engine, so that the engine is forced to be flamed out, and rapid braking is achieved.
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 3.5Bar, the ECU controller 9 sends a torque reduction signal to the engine 10, the engine 10 reduces the output torque, the torque is transmitted to the input end of the drive axle 6 through the transmission case 4 and the transmission shaft 5 by the engine 10, the input torque of the drive axle 6 is synchronously reduced at the moment, the braking torque provided by the brake 7 is far greater than the input torque of the drive axle 6, the drive axle 6 stops rotating, the transmission shaft 5, the transmission case 4 and the engine 10 also synchronously stop rotating, the engine 10 is forced to stall, and the mechanical drive road roller realizes emergency braking. When the barometric pressure signal is not greater than 3.5Bar, the engine 10 remains in its original state.
The range of the judgment value of the ECU controller 9 for the collected air pressure is: 3 bar to 4bar, preferably 3.5 bar;
after torque reduction, the output torque of the engine 10 is 300 N.m-400 N.m, preferably 350 N.m.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A braking device of a mechanical driving road roller comprises a brake pedal and a brake, and is characterized by also comprising 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;
the air bag is controlled by a brake pedal to convey air to the air boosting pump;
when the piston of the air booster pump is under the pressure of gas, the brake fluid is pushed into the brake to brake;
the air pressure sensor transmits the acquired 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 larger than the output torque of the engine, and the engine is stalled and braked.
2. A mechanically driven road roller braking apparatus as claimed in claim 1 wherein the output torque of the engine is transmitted to the input of the drive axle via the gearbox and drive shaft.
3. A brake rigging for a mechanically driven vehicle according to claim 2, wherein the drive axle is provided with a brake disc which rotates in synchronism with the wheel-side mounting disc on the drive axle.
4. A braking apparatus for a mechanically driven vehicle as claimed in claim 1 or claim 2, wherein the brake is provided on the drive axle.
5. The brake apparatus for a mechanically driven compactor according to claim 1 wherein the ECU controller controls the engine to reduce the output torque which is transmitted from the engine through the gearbox and drive shaft to the input of the drive axle so that the input torque to the drive axle is reduced synchronously.
6. The brake system of a mechanically driven compactor according to claim 5 wherein the drive shaft, gearbox and engine are stopped in synchronism to effect emergency braking when the brake provides a braking torque greater than the input torque to the drive axle to stop rotation of the drive axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920741446.8U CN210162067U (en) | 2019-05-22 | 2019-05-22 | Braking device of mechanical driving road roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920741446.8U CN210162067U (en) | 2019-05-22 | 2019-05-22 | Braking device of mechanical driving road roller |
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| Publication Number | Publication Date |
|---|---|
| CN210162067U true CN210162067U (en) | 2020-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920741446.8U Active CN210162067U (en) | 2019-05-22 | 2019-05-22 | Braking device of mechanical driving road roller |
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| CN (1) | CN210162067U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103906A (en) * | 2019-05-22 | 2019-08-09 | 徐工集团工程机械股份有限公司道路机械分公司 | A kind of brake apparatus and braking method of mechanical drive road roller |
-
2019
- 2019-05-22 CN CN201920741446.8U patent/CN210162067U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103906A (en) * | 2019-05-22 | 2019-08-09 | 徐工集团工程机械股份有限公司道路机械分公司 | A kind of brake apparatus and braking method of mechanical drive road roller |
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