CN107654637B - Asphalt distribution truck gear shifting device with detection control function and control method - Google Patents
Asphalt distribution truck gear shifting device with detection control function and control method Download PDFInfo
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- CN107654637B CN107654637B CN201710850785.5A CN201710850785A CN107654637B CN 107654637 B CN107654637 B CN 107654637B CN 201710850785 A CN201710850785 A CN 201710850785A CN 107654637 B CN107654637 B CN 107654637B
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- gear
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- magnetic switch
- gear shifting
- gearbox
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/74—Inputs being a function of engine parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
- F16H61/0265—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/74—Inputs being a function of engine parameters
- F16H2059/746—Engine running state, e.g. on-off of ignition switch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1208—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures with diagnostic check cycles; Monitoring of failures
- F16H2061/1216—Display or indication of detected failures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1228—Fixing failures by repairing failed parts, e.g. loosening a sticking valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
- F16H2061/161—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed by checking feasibility of shifts, i.e. determine if requested shift can be successfully completed and post shift values are in an acceptable range
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a gear shifting device of an asphalt spraying vehicle with a detection control function and a control method, wherein the gear shifting device comprises a gearbox connected to an input shaft and an output shaft, the input shaft of the gearbox is provided with a proximity switch, the gearbox is connected with a gear shifting cylinder through a gear shifting rod, the gear shifting cylinder is connected to a five-port three-position electromagnetic valve through a pipeline, and the five-port three-position electromagnetic valve is connected to a chassis air bag; the gear shifting cylinder is also provided with a magnetic switch I and a magnetic switch II; the proximity switch, the five-port three-position electromagnetic valve, the magnetic switches I and II are also connected with a controller, and the controller is also connected with a high-speed gear state lamp, a low-speed gear state lamp and an alarm lamp. The invention has simple structure and obvious effect, can detect whether the input shaft rotates through the proximity switch, and can detect the actual position of the gear shifting cylinder through the magnetic switches I and II so as to determine the gear of the gearbox, thereby realizing the effect of protecting the internal gear of the gearbox, and the whole system has simple structure, fewer added parts and strong practicability.
Description
Technical Field
The invention relates to a gear shifting device of an asphalt distribution truck, belongs to the field of engineering machinery, and particularly relates to a gear shifting device of an asphalt distribution truck with a detection control function and a control method.
Background
When the asphalt spraying vehicle sprays small spraying amount, the equipment is required to run at a lower stable speed. Meanwhile, in order to ensure the transfer speed of the equipment, a high-low gear gearbox device is required to be added on a chassis transmission shaft. The high-low gear speed change controller without the detection device is easy to cause short service life or direct damage in the construction process when a driver misoperates (the chassis engine is not flameout, and the input shaft is in high-speed rotation). And the driver cannot clearly and conveniently know the high and low gear state of the equipment. Meanwhile, the asphalt spraying vehicle is used for achieving closed-loop control of the rotating speed and the vehicle speed of an asphalt pump for meeting the requirement of spraying uniformity. The asphalt controller is required to collect chassis speed signals.
When the equipment needs to be switched in a high-low gear state, the piston rod of the high-low gear switching cylinder is extended/retracted by controlling the five-port three-position electromagnetic valve to be powered on/off, so that the high-low gear gearbox is in a low-speed/high-speed state. When the proximity switch is not arranged, and the chassis engine does not flameout first, the input shaft is in a high-speed rotation state, and gears in the high-low gear speed changing box are meshed after the high-low gear speed changing box is forcibly switched, so that the service life of the high-low gear speed changing box is short or the high-low gear speed changing box is directly damaged.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the asphalt distribution truck gear shifting device with the detection control function and the control method, which can prevent the reduction of the service life of a high-low gear gearbox or the direct damage caused by misoperation.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides an asphalt spraying vehicle gearshift with detect control function, includes the gearbox that connects to input shaft and output shaft respectively, input shaft one side of gearbox is provided with proximity switch in the radial position of input shaft flange, the gearbox is connected to the cylinder of shifting gears through the gear level, the big chamber interface and the little chamber interface of shifting gears the cylinder are connected to five three solenoid valves through the pipeline respectively, five three solenoid valves are connected to chassis air pocket through the pipeline; the gear shifting cylinder is also provided with a magnetic switch I and a magnetic switch II, wherein the magnetic switch I is used for detecting the expansion degree of the gear shifting cylinder; the proximity switch, the five-port three-position electromagnetic valve, the magnetic switch I and the magnetic switch II are further connected with a controller, and the controller is further connected with a high-speed gear state lamp, a low-speed gear state lamp and an alarm lamp.
Further, a proximity switch bracket is fixed on the gearbox shell, the proximity switch is fixed on the proximity switch bracket, the proximity switch vertically faces the input shaft flange, the vertical projection point of the proximity switch coincides with the disc center of the input shaft flange, and the rotating speed of the input shaft can be measured through the proximity switch.
Further, the magnetic switch I is arranged at a position, close to a large cavity interface, of the gear shifting cylinder, the magnetic switch II is arranged at a position, close to a small cavity interface, of the gear shifting cylinder, when the magnetic switch I is closed, the gear shifting cylinder stretches out, and the gearbox is in a low-speed state; when the magnetic switch is closed, the gear shifting cylinder is retracted, and the gearbox is in a low-speed state.
A control method of a gear shifting device of an asphalt distribution truck with a detection control function comprises the following steps of: when the equipment is switched from a high-speed gear state to a low-speed gear state, firstly, a chassis engine is flamed out, an input shaft stops rotating, a proximity switch detects that an input shaft flange is static, a Y1 coil of a five-port three-position electromagnetic valve is powered on after a gear shifting switch is switched to the low-speed gear state, high-pressure air of a chassis air bag enters a large cavity of a gear shifting cylinder along a pipeline through the five-port three-position electromagnetic valve, a piston rod of the gear shifting cylinder stretches out, a gearbox is switched to the low-speed gear state, a magnetic switch I is closed, a magnetic switch II is opened, and a controller controls a low-speed gear state lamp to be on; after the controller detects that the magnetic switch I is closed, the Y1 end of the five-port three-position electromagnetic valve is powered off, and the gear shifting cylinder keeps the extension state of the piston rod; the chassis engine input shaft is started to drive the output shaft to rotate through the gearbox, and the equipment runs at a low gear.
When the equipment is switched from a low-speed gear state to a high-speed gear state, firstly, a chassis engine is flamed out, an input shaft stops rotating, a proximity switch detects that an input shaft flange is static, after a gear shift switch is switched to the high-speed gear state, a Y2 coil of a five-port three-position electromagnetic valve is powered on, high-pressure air of a chassis air bag enters a small cavity of a gear shift cylinder along a pipeline through the five-port three-position electromagnetic valve, a piston rod of the gear shift cylinder is retracted, and a gearbox is switched to the high-speed gear state; at the moment, the magnetic switch II is closed, the magnetic switch I is opened, and the controller controls the high-speed gear status lamp to be on; after the controller detects that the magnetic switch II is closed, the Y2 end of the five-port three-position electromagnetic valve is powered off, and the gear shifting cylinder keeps the piston rod retraction state; the chassis engine input shaft is started to drive the output shaft to rotate through the gearbox, and the equipment runs at a high speed gear.
And a detection feedback step: in the gear shifting process, if the engine does not flameout first, the input shaft is in a high-speed rotation state, the proximity switch detects that the input shaft flange rotation signal is fed back to the controller, at the moment, even if the gear shifting switch is operated to carry out gear shifting action, the controller can not switch the power-on state of the five-port three-position electromagnetic valve, the gearbox can not switch the high-low gear state, and internal gears of the gearbox can be effectively protected.
A state checking step: when the equipment is in a high-speed gear state, the magnetic switch I is opened, the magnetic switch II is closed, and the controller controls the high-speed gear state lamp to be on; when the equipment is in a low-gear state, the magnetic switch I is closed, the magnetic switch II is opened, and the controller controls the low-gear state lamp to be on; the controller can know the high-low gear state of the gearbox by detecting the states of the magnetic switch I and the magnetic switch II; meanwhile, when the gear box breaks down and the action of the gear shifting cylinder is not in place, the magnetic switch I and the magnetic switch II are both disconnected, the controller alarms, the alarm lamp flashes, and an operator is prompted to check and repair the gear box.
Further, the state remains: the middle position function of the five-port three-position electromagnetic valve is a sealing function, so that the control mode can be ensured, and the high-low gear state of the equipment is kept unchanged when the equipment is shut down and power-off or the chassis air bag air pressure is insufficient for a period of time when the equipment is shut down.
Further, vehicle speed detection: the input shaft drives the output shaft through the gearbox, the output shaft drives the driving chassis of the rear axle to walk, and under the condition that the speed ratio of the rear axle is known, the opening and closing states of the magnetic switch I and the magnetic switch II are detected through the controller, so that the current gear of the gearbox is known, and the current speed ratio of the gearbox is determined; under the condition that the speed ratio of the gearbox and the rear axle is known, the controller can calculate the chassis speed by detecting the rotating speed of the input shaft flange; the asphalt spraying vehicle is used for achieving closed-loop control of the rotating speed and the vehicle speed of an asphalt pump for meeting the requirement of spraying uniformity, and the detected vehicle speed can be used as a spraying amount control signal.
The beneficial effects of the invention are as follows: whether the input shaft rotates or not can be detected through the proximity switch, and meanwhile, the actual position of the gear shifting cylinder can be detected through the magnetic switches I and II, so that the gear of the gearbox is determined, the effect of protecting the internal gear of the high-low gear gearbox is achieved, and the whole system is simple in structure, few in added parts and high in practicability; in addition, the speed signal can be obtained through calculation by detecting the rotation speed signal of the input shaft and the high-low gear state signal, and a speed detection device is not required to be additionally arranged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
In the figure: 1. the gear box comprises an input shaft, 2 input shaft flanges, 3, a proximity switch, 4, a gearbox, 41, a gear shifting lever, 5, a gear shifting cylinder, 6, a magnetic switch I, 7, a magnetic switch II, 8, an output shaft, 9, five-port three-position electromagnetic valves, 10 and a chassis air bag.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the asphalt distribution shifting device with the state detection control function comprises a gearbox 4 connected to an input shaft 1 and an output shaft 8, wherein a proximity switch 3 is arranged on one side of the input shaft 1 of the gearbox 4 at the radial position of an input shaft flange 2, the gearbox 4 is connected to a shifting cylinder 5 through a shift lever 41, a large cavity interface and a small cavity interface of the shifting cylinder 5 are respectively connected to five-port three-position electromagnetic valves 9 through pipelines, and the five-port three-position electromagnetic valves 9 are connected to a chassis air bag 10 through pipelines; the gear shifting cylinder 5 is also provided with a magnetic switch I6 and a magnetic switch II 7 for detecting the expansion degree of the gear shifting cylinder 5; the proximity switch 3, the five-port three-position electromagnetic valve 9, the magnetic switch I6 and the magnetic switch II 7 are also connected with a controller, and the controller is also connected with a high-speed gear state lamp, a low-speed gear state lamp and an alarm lamp.
Further, a proximity switch bracket is fixed on the shell of the gearbox 4, the proximity switch is fixed on the proximity switch bracket, the proximity switch 3 vertically faces the input shaft flange 2, the vertical projection point of the proximity switch 3 coincides with the circle center of the input shaft flange 2, and the input shaft rotating speed can be measured through the proximity switch 3.
Further, the magnetic switch I6 is mounted to the position, close to the large cavity interface, of the gear shifting cylinder 5, the magnetic switch II 7 is mounted to the position, close to the small cavity interface, of the gear shifting cylinder 5, when the magnetic switch I6 is closed and the magnetic switch II 7 is opened, the gear shifting cylinder 5 extends out, and the gearbox 4 is in a low-speed state; when the magnetic switch II 7 is closed and the magnetic switch I6 is opened, the gear shifting cylinder 5 is retracted, and the gearbox 4 is in a high-speed state.
A control method of a gear shifting device of an asphalt distribution truck with a detection control function comprises the following steps of: when the equipment is switched from a high-speed gear state to a low-speed gear state, firstly, a chassis engine is shut down, an input shaft 1 stops rotating, a proximity switch 3 detects that an input shaft flange 2 is static, a Y1 coil of a five-port three-position electromagnetic valve 9 is powered on after a gear shifting switch is switched to the low-speed gear state, high-pressure air of a chassis air bag 10 enters a large cavity of a gear shifting cylinder 5 along a pipeline through the five-port three-position electromagnetic valve 9, a piston rod of the gear shifting cylinder 5 stretches out, a gearbox 4 is switched to the low-speed gear state, a magnetic switch I6 is closed, a magnetic switch II 7 is opened, and a controller controls a low-speed gear state lamp to be on; after the controller detects that the magnetic switch I6 is closed, the Y1 end of the five-port three-position electromagnetic valve 9 is powered off, and the gear shifting cylinder 5 keeps the extension state of the piston rod; the chassis engine input shaft 1 is started to drive the output shaft 8 to rotate through the gearbox 4, and the equipment runs at a low speed.
When the equipment is switched from a low-speed gear state to a high-speed gear state, firstly, a chassis engine is shut down, an input shaft 1 stops rotating, a proximity switch 3 detects that an input shaft flange 2 is static, after a gear shift switch is switched to the high-speed gear state, a Y2 coil of a five-port three-position electromagnetic valve 9 is powered on, high-pressure air of a chassis air bag 10 enters a small cavity of a gear shift cylinder 5 along a pipeline through the five-port three-position electromagnetic valve 9, a piston rod of the gear shift cylinder 5 is retracted, and a gearbox 4 is switched to the high-speed gear state; at the moment, the magnetic switch II 7 is closed, the magnetic switch I6 is opened, and the controller controls the high-speed gear status lamp to be on; after the controller detects that the magnetic switch II 7 is closed, the Y2 end of the five-port three-position electromagnetic valve 9 is powered off, and the gear shifting cylinder 5 keeps the piston rod retraction state; the chassis engine input shaft 1 is started to drive the output shaft 8 to rotate through the gearbox 4, and the equipment runs at a high speed gear.
And a detection feedback step: in the gear shifting process, if the engine does not flameout first and the input shaft 1 is in a high-speed rotation state, the proximity switch 3 detects that the rotation signal of the input shaft flange 2 is fed back to the controller, and at the moment, even if the gear shifting switch is operated to perform gear shifting action, the controller can not switch the power-on state of the five-port three-position electromagnetic valve 9, the gearbox 4 can not switch the high-low gear state, and internal gears of the gearbox 4 can be effectively protected.
A state checking step: when the equipment is in a high-speed gear state, the magnetic switch I6 is opened, the magnetic switch II 7 is closed, and the controller controls the high-speed gear state lamp to be on; when the equipment is in a low-gear state, the magnetic switch I6 is closed, the magnetic switch II 7 is opened, and the controller controls the low-gear state lamp to be on; the controller can know the high-low gear state of the gearbox 4 by detecting the states of the magnetic switch I6 and the magnetic switch II 7; meanwhile, when the gear box 4 breaks down and the action of the gear shifting cylinder 5 is not in place, the magnetic switch I6 and the magnetic switch II 7 are both disconnected, the controller gives an alarm, and the alarm lamp blinks to prompt an operator to check and repair the gear box 4.
Further, the state remains: the control mode can be ensured by the function of the middle position of the five-port three-position electromagnetic valve 9 as a sealing function, and the high-low gear state of the equipment is kept unchanged when the equipment is shut down and power-off or the chassis air bag air pressure is insufficient for a period of time when the equipment is shut down.
Further, vehicle speed detection: the input shaft 1 drives the output shaft 8 through the gearbox 4, the output shaft 8 drives the drive chassis of the rear axle to walk, and under the condition that the speed ratio of the rear axle is known, the opening and closing states of the magnetic switch I6 and the magnetic switch II 7 are detected through the controller, so that the current gear of the gearbox 4 is known, and the current speed ratio of the gearbox 4 is determined; under the condition that the speed ratio of the gearbox 4 and the rear axle is known, the chassis speed is calculated by a controller by detecting the rotating speed of the input shaft flange 2; the asphalt spraying vehicle is used for achieving closed-loop control of the rotating speed and the vehicle speed of an asphalt pump for meeting the requirement of spraying uniformity, and the detected vehicle speed can be used as a spraying amount control signal.
In summary, the invention has simple structure and obvious effect, can detect whether the input shaft rotates through the proximity switch, and can detect the actual position of the gear shifting cylinder through the magnetic switches I and II so as to determine the gear of the gearbox, thereby realizing the effect of protecting the internal gear of the gearbox, and the whole system has simple structure, few added parts and strong practicability; in addition, the speed signal can be obtained through calculation by detecting the rotation speed signal of the input shaft and the high-low gear state signal, and a speed detection device is not required to be additionally arranged.
Claims (5)
1. A control method of a gear shifting device of an asphalt spraying vehicle with a detection control function is characterized by comprising a gear box (4) connected to an input shaft (1) and an output shaft (8), wherein a proximity switch (3) is arranged on one side of the input shaft (1) of the gear box (4) at the radial position of an input shaft flange (2), the gear box (4) is connected to a gear shifting cylinder (5) through a gear shifting lever (41), a large cavity interface and a small cavity interface of the gear shifting cylinder (5) are respectively connected to five-port three-position electromagnetic valves (9) through pipelines, and the five-port three-position electromagnetic valves (9) are connected to a chassis air bag (10) through pipelines; the gear shifting cylinder (5) is also provided with a magnetic switch I (6) and a magnetic switch II (7) for detecting the expansion degree of the gear shifting cylinder (5); the proximity switch (3), the five-port three-position electromagnetic valve (9), the magnetic switch I (6) and the magnetic switch II (7) are also connected with a controller, and the controller is also connected with a high-speed gear state lamp, a low-speed gear state lamp and an alarm lamp;
and includes the steps of controlling the shifting step: when the equipment is switched from a high-speed gear state to a low-speed gear state, firstly, a chassis engine is flamed out, an input shaft (1) stops rotating, a proximity switch (3) detects that an input shaft flange (2) is static, a Y1 coil of a five-port three-position electromagnetic valve (9) is powered on after the gear shifting switch is switched to the low-speed gear state, high-pressure air of a chassis air bag (10) enters a large cavity of a gear shifting cylinder (5) along a pipeline through the five-port three-position electromagnetic valve (9), a piston rod of the gear shifting cylinder (5) stretches out, a gearbox (4) is switched to the low-speed gear state, a magnetic switch I (6) is closed, a magnetic switch II (7) is opened, and a controller controls a low-speed gear state lamp to be on; after the controller detects that the magnetic switch I (6) is closed, the Y1 end of the five-port three-position electromagnetic valve (9) is powered off, and the gear shifting cylinder (5) keeps the extension state of the piston rod; starting an input shaft (1) of a chassis engine to drive an output shaft (8) to rotate through a gearbox (4), and enabling the equipment to run at a low gear; when the equipment is switched from a low-speed gear state to a high-speed gear state, firstly, a chassis engine is flamed out, an input shaft (1) stops rotating, a proximity switch (3) detects that an input shaft flange (2) is static, after the gear shift switch is switched to the high-speed gear state, a Y2 coil of a five-port three-position electromagnetic valve (9) is powered on, high-pressure air of a chassis air bag (10) enters a small cavity of a gear shift cylinder (5) along a pipeline through the five-port three-position electromagnetic valve (9), a piston rod of the gear shift cylinder (5) is retracted, and a gearbox (4) is switched to the high-speed gear state; at the moment, the magnetic switch II (7) is closed, the magnetic switch I (6) is opened, and the controller controls the high-speed gear status lamp to be on; after the controller detects that the magnetic switch II (7) is closed, the Y2 end of the five-port three-position electromagnetic valve (9) is powered off, and the gear shifting cylinder (5) keeps the piston rod retraction state; starting an input shaft (1) of a chassis engine to drive an output shaft (8) to rotate through a gearbox (4), and enabling the equipment to run at a high speed; and a detection feedback step: in the gear shifting process, if the engine does not flameout first, the input shaft (1) is in a high-speed rotating state, the proximity switch (3) detects that a rotating signal of the input shaft flange (2) is fed back to the controller, at the moment, even if the gear shifting switch is operated to perform gear shifting action, the controller does not switch the power-on state of the five-port three-position electromagnetic valve (9), the gearbox (4) does not switch the high-low gear state, and the internal gear of the gearbox (4) can be effectively protected; a state checking step: when the equipment is in a high-speed gear state, the magnetic switch I (6) is opened, the magnetic switch II (7) is closed, and the controller controls the high-speed gear state lamp to be on; when the equipment is in a low-gear state, the magnetic switch I (6) is closed, the magnetic switch II (7) is opened, and the controller controls the low-gear state lamp to be on; the controller can know the high-low gear state of the gearbox (4) by detecting the states of the magnetic switch I (6) and the magnetic switch II (7); meanwhile, when the gear box (4) breaks down to make the action of the gear shifting cylinder (5) not in place, the magnetic switch I (6) and the magnetic switch II (7) are both disconnected, and the controller controls the alarm lamp to flash to send an alarm signal to prompt an operator to check and repair the gear box (4).
2. The control method of the asphalt distribution truck gear shifting device with the detection control function according to claim 1, wherein the middle position function of the five-port three-position electromagnetic valve (9) is a closed function, and the high-low gear state of the equipment is kept unchanged when the equipment is shut down and power-off or the chassis air bag air pressure is insufficient for a period of time when the equipment is shut down.
3. The control method of a shift device for an asphalt distribution vehicle having a detection control function according to claim 1, further comprising vehicle speed detection: the input shaft (1) drives the output shaft (8) through the gearbox (4), the output shaft (8) drives the drive chassis of the rear axle to walk, and under the condition that the speed ratio of the rear axle is known, the opening and closing states of the magnetic switch I (6) and the magnetic switch II (7) are detected through the controller, so that the current gear of the gearbox (4) is known, and the current speed ratio of the gearbox (4) is determined; under the condition that the speed ratio of the gearbox (4) and the rear axle is known, the speed of the chassis is calculated by a controller by detecting the rotating speed of the input shaft flange (2); the asphalt spraying vehicle is used for achieving closed-loop control of the rotating speed and the vehicle speed of the asphalt pump for meeting the requirement of the spraying uniformity, and the detected vehicle speed is used as a spraying amount control signal.
4. The control method of the asphalt distribution truck gear shifting device with the detection control function according to claim 1, wherein a proximity switch bracket is fixed on a shell of the gearbox (4), the proximity switch is fixed on the proximity switch bracket, the proximity switch (3) faces the input shaft flange (2) vertically, and a vertical projection point of the proximity switch (3) coincides with the center of the input shaft flange (2).
5. The control method of the asphalt distribution truck gear shifting device with the detection control function according to claim 1, wherein the magnetic switch I (6) is mounted to the gear shifting cylinder (5) at a position close to a large cavity interface, and the magnetic switch II (7) is mounted to the gear shifting cylinder (5) at a position close to a small cavity interface.
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| CN201710850785.5A CN107654637B (en) | 2017-09-20 | 2017-09-20 | Asphalt distribution truck gear shifting device with detection control function and control method |
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| CN201710850785.5A CN107654637B (en) | 2017-09-20 | 2017-09-20 | Asphalt distribution truck gear shifting device with detection control function and control method |
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| CN107654637B true CN107654637B (en) | 2023-09-12 |
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| CN201110369Y (en) * | 2007-08-23 | 2008-09-03 | 上海燃料电池汽车动力系统有限公司 | Dual-dynamic synthesis and automatic gear box integrated system of hybrid power city carriage |
| CN102979862A (en) * | 2012-11-23 | 2013-03-20 | 武汉理工通宇新源动力有限公司 | Two speed automatic transmission |
| CN107178609A (en) * | 2017-06-15 | 2017-09-19 | 厦门厦金机械股份有限公司 | The high low gear gearshift of ecp |
| CN207178666U (en) * | 2017-09-20 | 2018-04-03 | 徐州徐工筑路机械有限公司 | Pitch sprinkling car gearshift with detection control function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201110369Y (en) * | 2007-08-23 | 2008-09-03 | 上海燃料电池汽车动力系统有限公司 | Dual-dynamic synthesis and automatic gear box integrated system of hybrid power city carriage |
| CN102979862A (en) * | 2012-11-23 | 2013-03-20 | 武汉理工通宇新源动力有限公司 | Two speed automatic transmission |
| CN107178609A (en) * | 2017-06-15 | 2017-09-19 | 厦门厦金机械股份有限公司 | The high low gear gearshift of ecp |
| CN207178666U (en) * | 2017-09-20 | 2018-04-03 | 徐州徐工筑路机械有限公司 | Pitch sprinkling car gearshift with detection control function |
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