CN112677941A - Land leveler parking brake control method, land leveler parking brake system and land leveler - Google Patents
Land leveler parking brake control method, land leveler parking brake system and land leveler Download PDFInfo
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- CN112677941A CN112677941A CN202110088610.1A CN202110088610A CN112677941A CN 112677941 A CN112677941 A CN 112677941A CN 202110088610 A CN202110088610 A CN 202110088610A CN 112677941 A CN112677941 A CN 112677941A
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Abstract
The invention provides a land leveler parking brake control method, a land leveler parking brake system and a land leveler. The land leveler parking brake control method comprises the following steps: step S100: when the in-place information of the driver is effective, acquiring a first parameter signal of the land leveler; step S200: and controlling the braking state of the grader according to the first parameter signal. According to the technical scheme, the automatic control of the braking state of the land leveler can be realized, the land leveler can automatically enter the parking braking state when parking, the manual operation of a driver is not needed, the driving operation difficulty of the land leveler can be reduced, the possibility of sliding or sliding of the land leveler in the parking state can also be reduced, the land leveler is particularly suitable for the construction process needing direct and frequent switching between the driving state and the parking state, the possibility of safety accidents can be effectively reduced, and the influence on the normal construction process is reduced.
Description
Technical Field
The application relates to the technical field of land leveler control, in particular to a land leveler parking brake control method, a land leveler parking brake system and a land leveler.
Background
Currently, a conventional grader is equipped with a parking brake system during construction due to the requirements of the construction work object and the complexity of the construction environment terrain. However, the operations of starting, releasing and the like of the parking brake system of the existing land leveller need to be manually completed by a driver, when the land leveller is frequently switched between the running state and the parking state, the driver easily ignores or forgets the parking brake operation, and particularly, the vehicle sliding phenomenon is easy to occur, safety accidents are caused, and the safety of the land leveller in the construction process is influenced.
Disclosure of Invention
According to an embodiment of the present invention, it is intended to improve at least one of technical problems existing in the prior art or the related art.
To this end, it is an object according to an embodiment of the present invention to provide a grader parking brake control method.
It is another object of an embodiment in accordance with the present invention to provide a grader parking brake system.
It is a further object of an embodiment in accordance with the present invention to provide a motor grader.
In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided a grader parking brake control method including: step S100: when the in-place information of the driver is effective, acquiring a first parameter signal of the land leveler; step S200: and controlling the braking state of the grader according to the first parameter signal.
According to the embodiment of the first aspect of the invention, when the presence signal of the driver is valid, namely the driver is located at the driving position, the using state (such as the parking state or the driving state) of the land scraper is determined by acquiring the first parameter signal of the land scraper, such as a vehicle speed signal, a brake pedal position signal, an engine speed signal, a gear signal and the like, and then the braking state of the land scraper is controlled according to the using state of the land scraper, for example, the land scraper is controlled to be in the parking braking state when the land scraper is in the parking state, or the land scraper is controlled to be in the parking braking state when the land scraper is in the driving state or is about to be in the driving state.
According to the land leveler parking brake control method, automatic control of the land leveler brake state can be achieved, manual operation of a driver is not needed, the driving operation difficulty of the land leveler is reduced, the possibility that the land leveler slides or slips in the parking state is also reduced, particularly in the construction process that the land leveler needs to be frequently switched between the driving state and the parking state, the safety of the land leveler can be effectively improved, the possibility of safety accidents is favorably reduced, and the influence on the normal construction process is reduced.
In addition, the grader parking brake control method in the above technical solution according to an embodiment of the present invention may further have the following additional technical features:
in the above technical solution, step S100: when the driver presence information is valid, acquiring a first parameter signal of the grader, comprising: step S101: when the on-site information of the driver is effective and a first parking brake and a second parking brake of the grader are in a closed state, acquiring a brake pedal position signal and a vehicle speed signal of the grader; step S200: controlling a braking state of the grader based on the first parameter signal, comprising: step S201: judging whether the brake pedal is in a braking position according to the brake pedal position signal to generate a first judgment result; if the first determination result is yes, go to step S202; if the first judgment result is no, executing step S101; step S202: judging whether the speed of the land leveler is equal to a speed threshold value and continuously exceeds a first duration, and generating a second judgment result; if the second determination result is yes, step S203 is executed: controlling the gear of the land leveler to be switched to a parking gear, controlling a first parking brake to be started at the same time, and outputting corresponding prompt information; if the second determination result is negative, step S101 is executed.
In the technical scheme, whether a brake pedal is stepped down is determined through a brake pedal position signal so as to judge whether the grader brakes; further, if the brake pedal is in the braking position, it is determined whether the current vehicle speed of the motor grader is equal to a vehicle speed threshold (the vehicle speed threshold may be zero or close to zero) through a vehicle speed signal of the motor grader, and the current vehicle speed of the motor grader continuously exceeds a first time length (the first time length may be 1s, 2s or other preset time lengths) to determine whether the motor grader is in the parking state. When the grader is determined to be in a parking state, the gear of the grader is switched to a parking gear, and a first parking brake is controlled to be started, so that the grader enters a parking brake state; meanwhile, prompt information corresponding to the parking brake state is output, such as an indicator light signal, image-text information display or sound information output, so that a driver is prompted, and the driver can conveniently know the brake state of the grader in time.
In the above technical solution, the grader parking brake control method further includes: step S205: continuously acquiring a vehicle speed signal of the land scraper, judging whether the vehicle speed of the land scraper is greater than a vehicle speed threshold value or not, and generating a third judgment result; if the third determination result is yes, step S206 is executed: controlling the second parking brake to be started; if the third determination result is negative, step S207 is executed: the current operating state is maintained.
In the technical scheme, when the land leveler is in a parking brake state, the speed signal of the land leveler is continuously acquired so as to monitor the brake effect of the first parking brake. And if the vehicle speed is greater than the vehicle speed threshold value, the first parking brake is in failure, and the land leveler does not actually enter a parking brake state. At this time, the second parking brake is activated to perform a parking brake operation on the grader, so that the grader enters a parking brake state. Through setting up second parking brake as reserve parking arresting gear, supplementary first parking brake realizes dual parking braking, is favorable to improving the security performance of leveler.
In the above technical solution, step S206: controlling the second parking brake to be activated, comprising: step S208: and controlling at least two transmission clutches with different transmission ratios in the same group in a gearbox of the land leveller to work simultaneously, so that interference is formed between the at least two transmission clutches to realize braking.
In the technical scheme, in the step of controlling the second parking brake of the land scraper to be started, the method specifically comprises the steps of controlling at least two clutches with different transmission ratios in the same group in the gearbox to work simultaneously so as to enable the different clutches in the same group to form mutual interference, and realizing parking brake by utilizing a mechanical jam phenomenon. Compared with the existing parking braking mode, the parking braking mode of the scheme is more direct and has higher reliability. The stopping braking mode different from the first stopping brake is used as an auxiliary stopping braking mode, so that the grader can still normally perform stopping braking when the first stopping brake fails, and double guarantee is realized.
In the above technical solution, step S100: when the driver presence information is valid, acquiring a first parameter signal of the grader, comprising: step S102: when the on-site information of a driver is effective and a first parking brake and/or a second parking brake of the land leveler are/is in an opening state, an engine speed signal and a gear signal of a gearbox of the land leveler are acquired; step S200: controlling a braking state of the grader based on the first parameter signal, comprising: step S210: judging whether the engine speed of the land leveler is greater than a speed threshold value or not, and generating a fourth judgment result; if the fourth determination result is yes, go to step S211; if the fourth determination result is negative, executing step S102; step S211: judging whether the gear of a gearbox of the land leveler is in a forward gear or a backward gear, and generating a fifth judgment result; if the fifth determination result is yes, go to step S212: controlling the first parking brake and the second parking brake to stop running and outputting corresponding prompt information; if the fifth determination result is negative, step S102 is executed.
In the technical scheme, whether the grader possibly enters a running state is determined by comparing the magnitude relation between the engine speed of the grader and the speed threshold. The rotation speed threshold value can be 750rpm or other preset rotation speed values, and when the rotation speed of the engine is greater than the rotation speed threshold value, the fact that the grader is going to run can be determined. It is understood that if the engine is idling, it is normally stopped for a short time. At the moment, whether the grader is about to enter a running state is further determined by judging whether the gear of the gearbox is in a forward gear or a backward gear, and when the gear is in the forward gear or the backward gear, the first parking brake and the second parking brake are controlled to stop running, so that the parking brake state is relieved, and the grader can normally run; meanwhile, the prompting function is provided for the driver by outputting the prompting information corresponding to the state of releasing the parking brake. The prompting information includes, but is not limited to, an indicator light signal, a graphic information or a voice information to prompt the driver.
In an embodiment of the second aspect of the invention there is provided a grader parking brake system for implementing the grader parking brake control method of any one of the embodiments of the first aspect above, the grader parking brake system comprising: the first parking brake and the second parking brake are arranged on the land leveler and used for braking the land leveler; a detection component for detecting a first parameter signal of the grader; the controller is respectively electrically connected with the first parking brake, the second parking brake and the detection assembly, and controls the first parking brake and/or the second parking brake to work according to the first parameter signal so as to control the braking state of the land leveler; the controller is electrically connected with a gear shifting mechanism of the land leveler to control the gear shifting mechanism to shift gears.
According to an embodiment of the second aspect of the invention, a grader parking brake system comprises: the parking brake system comprises a first parking brake, a second parking brake, a detection assembly and a controller. The first parking brake and the second parking brake may brake the grader, respectively. The detection component detects a first parameter signal of the land scraper, such as a vehicle speed signal, a brake pedal position signal, an engine speed signal, a gear signal and the like, and transmits a detection result to the controller, the controller determines the use state (such as a parking state or a running state) of the land scraper according to the first parameter signal, and then controls the braking state of the land scraper according to different use states of the land scraper, such as controlling the land scraper to enter the parking braking state when the land scraper is in the parking state or controlling the land scraper to release the parking braking state when the land scraper is in the running state or is about to enter the running state. Wherein the controller is capable of controlling the first parking brake, the second parking brake, and the gear shift mechanism of the grader, respectively.
The land leveler parking brake system in the scheme can realize automatic control of the braking state of the land leveler, does not need a driver to perform manual operation, can effectively improve the safety of the land leveler, is favorable for reducing the possibility of safety accidents, and reduces the influence on the normal construction process.
In addition, the grader parking brake system in the present solution also has all the beneficial effects of any one of the grader parking brake control methods in the embodiments of the first aspect, and is not described herein again.
In the above aspect, the first parking brake includes: and the parking brake clutch is arranged at the output end of the transmission of the grader, and the parking brake clutch can lock the output end of the transmission to realize braking.
In this solution, the first parking brake comprises a parking brake clutch. The parking brake clutch locks the output end of the speed changer to stop the output of the speed changer so as to realize parking brake and prevent the land leveler from sliding.
In the above aspect, the second parking brake includes: the transmission mechanism comprises at least two transmission clutches, a transmission mechanism and a transmission mechanism, wherein the at least two transmission clutches are arranged in a transmission of the grader, and each transmission clutch can be connected with one transmission gear in the same group; wherein at least two transmission clutches can enable at least two transmission gears in the same group to form mutual interference so as to realize braking.
In this solution, the second parking brake comprises at least two transmission clutches provided in the transmission of the motor grader. Each transmission clutch can be connected to a transmission gear in the same group in the gearbox to enable the transmission gear to operate. By driving at least two transmission clutches to work simultaneously, at least two transmission gears with different transmission ratios in the same group can work simultaneously, so that mutual interference is formed, the transmission is mechanically jammed, and parking braking is realized. The structure and the braking principle of second parking brake in this scheme are different with first parking brake to as reserve parking arresting gear, when first parking brake broke down, can utilize second parking brake to carry out auxiliary braking, thereby improve the security of leveler.
In the above technical solution, the grader parking brake system further includes: the prompting device is arranged on the land leveler, electrically connected with the controller and used for outputting prompting information corresponding to the braking state of the land leveler under the control of the controller; and/or a manual operation device arranged on the land leveler, wherein the manual operation device is electrically connected with the controller and is used for inputting manual operation instructions corresponding to the first parking brake and the second parking brake.
In the technical scheme, the prompting device electrically connected with the controller is arranged to output the prompting information corresponding to the braking state of the grader, wherein the prompting information comprises but is not limited to an indicator light signal, image-text information or sound information to prompt a driver, so that the driver can know the braking state of the grader in time conveniently.
Through the arrangement of the manual operation device electrically connected with the controller, the braking state of the land leveler can be controlled according to a manual operation signal input by a driver on the basis of realizing automatic control of the land leveler parking braking system. For example, the manual operation device may be provided with a manual button, and the first parking brake is activated when the button is pulled up, and the first parking brake is deactivated when the button is pressed down; the manual button can be a self-reset button, and the button can reset automatically after the hand is released no matter the button is pulled or pressed.
In an embodiment of a third aspect of the present invention there is provided a grader comprising: the land leveler comprises a land leveler body, wherein the land leveler body is provided with a transmission and a gear shifting mechanism; the grader parking brake system according to any of the embodiments of the second aspect is provided on the grader body.
According to an embodiment of the third aspect of the invention, the grader comprises a grader body and a grader parking brake system of any of the embodiments of the second aspect described above. The land leveler parking brake system is characterized in that the land leveler body is provided with a transmission and a gear shifting mechanism, a controller of the land leveler parking brake system can control the gear shifting mechanism to adjust gears, a first parking brake and/or a second parking brake can be controlled to act on the transmission, parking brake is achieved when the land leveler parks, manual operation is not needed, the phenomenon that the land leveler slides can be effectively prevented, and the land leveler is favorable for improving the safety of the land leveler.
In addition, the grader in the present solution also has all the beneficial effects of the grader parking brake system in any one of the embodiments of the second aspect described above, and details are not repeated here.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 illustrates a flow diagram of a grader parking brake control method according to one embodiment of the present disclosure;
FIG. 2 illustrates a flow diagram of a grader parking brake control method according to one embodiment of the present disclosure;
FIG. 3 illustrates a flow chart of a grader parking brake control method according to one embodiment of the present disclosure;
FIG. 4 illustrates a flow chart of a grader parking brake control method according to one embodiment of the present disclosure;
FIG. 5 illustrates a flow chart of a grader parking brake control method according to one embodiment of the present disclosure;
FIG. 6 illustrates a flow chart of a grader parking brake control method according to one embodiment of the present disclosure;
FIG. 7 illustrates a flow chart of a grader parking brake control method according to one embodiment of the present disclosure;
FIG. 8 shows a schematic block diagram of a grader parking brake system according to one embodiment of the present disclosure;
FIG. 9 shows a schematic block diagram of a grader parking brake system according to one embodiment of the present disclosure;
FIG. 10 illustrates a schematic internal structural view of a transmission of a grader in accordance with an embodiment of the present disclosure;
FIG. 11 shows a schematic block diagram of a grader parking brake system according to one embodiment of the present disclosure;
FIG. 12 shows a schematic block diagram of a grader parking brake system according to one embodiment of the present disclosure;
FIG. 13 shows a schematic block diagram of a grader parking brake system according to one embodiment of the present disclosure;
FIG. 14 shows a schematic block diagram of a grader, according to one embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 8 to 14 is as follows:
1 grader parking brake system, 11 first parking brake, 111 parking brake clutch, 12 second parking brake, 121 first transmission clutch, 122 second transmission clutch, 13 detection assembly, 14 controller, 15 prompting device, 16 manual operation device, 2 grader, 21 grader body, 211 transmission, 2111 transmission gear, 212 gear shifting mechanism.
Detailed Description
In order that the above objects, features and advantages of the embodiments according to the present invention can be more clearly understood, embodiments according to the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments according to the invention, however, embodiments according to the invention may be practiced in other ways than those described herein, and therefore the scope of protection of this application is not limited by the specific embodiments disclosed below.
A grader parking brake control method, a grader parking brake system, and a grader according to some embodiments of the present invention are described below with reference to fig. 1-14.
Example one
The embodiment provides a grader parking brake control method, as shown in fig. 1, including the following steps:
step S100: when the in-place information of the driver is effective, acquiring a first parameter signal of the land leveler;
step S200: and controlling the braking state of the grader according to the first parameter signal.
In this embodiment, through steps S100 and S200, when the presence signal is valid, a first parameter signal (including a vehicle speed signal, a brake pedal position signal, an engine speed signal, a gear signal, etc.) of the grader is obtained to determine a use state (such as a parking state or a driving state) of the grader, and then the brake state of the grader is controlled according to the use state. For example, the grader is controlled to enter the parking brake state when the grader is in the parking state, or the grader is controlled to release the parking brake state when the grader is in the running state or is about to enter the running state. Through the steps of the method, the automatic control of the braking state of the land leveler can be realized, the manual operation of a driver is not needed, the driving operation difficulty of the land leveler can be reduced, the possibility of the land leveler sliding or sliding in the parking state can also be reduced, the method is particularly suitable for the construction process needing direct and frequent switching between the driving state and the parking state, the possibility of safety accidents can be effectively reduced, and the influence on the normal construction process is reduced.
Example two
The embodiment provides a grader parking brake control method, as shown in fig. 2, including the following steps:
step S101: when the on-site information of the driver is effective and a first parking brake and a second parking brake of the grader are in a closed state, acquiring a brake pedal position signal and a vehicle speed signal of the grader;
step S201: judging whether the brake pedal is in a braking position according to the brake pedal position signal to generate a first judgment result; if the first determination result is yes, executing step S202, and if the first determination result is no, executing step S101;
step S202: judging whether the speed of the land leveler is equal to a speed threshold value and continuously exceeds a first duration, and generating a second judgment result; if the second determination result is yes, executing step S203, and if the second determination result is no, executing step S101;
step S203: and controlling the gear of the land leveler to be switched to the parking gear, controlling the first parking brake to be started at the same time, and outputting corresponding prompt information.
In this embodiment, step S100 and step S200 in the first embodiment are further modified. Through step S101, a brake pedal position signal and a vehicle speed signal are acquired to provide a basis for subsequent determination steps. Through the step S201, whether the pedal position is in the braking position or not is judged, whether the brake pedal is stepped on or not is determined, and whether the grader is in the braking process or not is further judged; when the brake pedal is in the braking position, it is further determined whether the current vehicle speed of the grader is equal to a vehicle speed threshold (the vehicle speed threshold may be zero or a value close to zero) and the vehicle speed threshold is maintained for more than a first period (the first period may be 1S, 2S or other preset period) to determine whether the grader is in a stopped state, via step S202. When the grader is determined to be in the parking state, controlling the first parking brake to brake the grader through step S203, so that the grader enters the parking brake state; meanwhile, prompt information corresponding to the parking brake state is output, so that a driver can know the brake state of the land leveler in time. The prompt message includes, but is not limited to, an indicator light signal, a graphic message, or a voice message.
EXAMPLE III
The embodiment provides a grader parking brake control method, as shown in fig. 3, including the following steps:
step S101: when the on-site information of the driver is effective and a first parking brake and a second parking brake of the grader are in a closed state, acquiring a brake pedal position signal and a vehicle speed signal of the grader;
step S201: judging whether the brake pedal is in a braking position according to the brake pedal position signal to generate a first judgment result; if the first determination result is yes, executing step S202, and if the first determination result is no, executing step S101;
step S202: judging whether the speed of the land leveler is equal to a speed threshold value and continuously exceeds a first duration, and generating a second judgment result; if the second determination result is yes, executing step S203, and if the second determination result is no, executing step S101;
step S203: controlling the gear of the land leveler to be switched to a parking gear, controlling a first parking brake to be started at the same time, and outputting corresponding prompt information;
step S205: continuously acquiring a vehicle speed signal of the land scraper, judging whether the vehicle speed of the land scraper is greater than a vehicle speed threshold value or not, and generating a third judgment result; if the third determination result is yes, performing step S206, and if the third determination result is no, performing step S207;
step S206: controlling the second parking brake to be started;
step S207: the current operating state is maintained.
In this embodiment, step S205 to step S207 are added to embodiment two. The grader is in the parking brake state, and the braking effect of the first parking brake is monitored to determine the actual braking state of the grader, through step S205. If the vehicle speed is greater than the vehicle speed threshold value, the grader still does not enter a parking brake state, and the first parking brake is determined to be in a fault state at the moment; through step S206, the second parking brake is activated to perform a braking operation on the grader, so that the grader enters a parking braking state, thereby implementing dual parking braking, which is beneficial to improving the safety performance of the grader.
Example four
The embodiment provides a grader parking brake control method, as shown in fig. 4, including the following steps:
step S101: when the on-site information of the driver is effective and a first parking brake and a second parking brake of the grader are in a closed state, acquiring a brake pedal position signal and a vehicle speed signal of the grader;
step S201: judging whether the brake pedal is in a braking position according to the brake pedal position signal to generate a first judgment result; if the first determination result is yes, executing step S202, and if the first determination result is no, executing step S101;
step S202: judging whether the speed of the land leveler is equal to a speed threshold value and continuously exceeds a first duration, and generating a second judgment result; if the second determination result is yes, executing step S203, and if the second determination result is no, executing step S101;
step S203: controlling the gear of the land leveler to be switched to a parking gear, controlling a first parking brake to be started at the same time, and outputting corresponding prompt information;
step S205: continuously acquiring a vehicle speed signal of the land scraper, judging whether the vehicle speed of the land scraper is greater than a vehicle speed threshold value or not, and generating a third judgment result; if the third determination result is yes, performing step S208, otherwise, performing step S207;
step S208: controlling at least two transmission clutches with different transmission ratios in the same group in a gearbox of the land leveller to work simultaneously, so that interference is formed between the at least two transmission clutches to realize braking;
step S207: the current operating state is maintained.
In this embodiment, step S206 in the third embodiment is further improved. Through step S208, at least two clutches with different transmission ratios in the same group of the transmission are controlled to operate simultaneously, so that the clutches with different transmission ratios in the same group interfere with each other, and the output rotation speed of the transmission is zero by utilizing the mechanical jam phenomenon, thereby realizing parking brake. The parking brake mode different from the first parking brake is used as an auxiliary parking brake mode, so that the grader can still normally perform parking brake when the first parking brake fails, and the reliability is higher.
EXAMPLE five
The embodiment provides a grader parking brake control method, as shown in fig. 5, including the following steps:
step S102: when the on-site information of a driver is effective and a first parking brake and/or a second parking brake of the land leveler are/is in an opening state, an engine speed signal and a gear signal of a gearbox of the land leveler are acquired;
step S210: judging whether the engine speed of the land leveler is greater than a speed threshold value or not, and generating a fourth judgment result; if the fourth determination result is yes, performing step S211, and if the fourth determination result is no, performing step S102;
step S211: judging whether the gear of a gearbox of the land leveler is in a forward gear or a backward gear, and generating a fifth judgment result; if the fifth determination result is yes, performing step S212, and if the fifth determination result is no, performing step S102;
step S212: and controlling the first parking brake and the second parking brake to stop running and outputting corresponding prompt information.
In this embodiment, step S100 and step S200 in the first embodiment are further modified. Through step S102, an engine speed signal and a gearbox gear signal are obtained to provide a basis for subsequent judgment steps. The magnitude relationship of the engine speed of the grader and the speed threshold is compared to determine whether the grader is likely to enter the running state, via step S210. Wherein the rotation speed threshold value can be 750rpm or other rotation speed values. It can be understood that if the engine is in an idle state, the engine is generally stopped for a short time; when the engine speed is greater than the speed threshold, it may be determined that the grader is about to run. At this time, in step S211, it is further determined whether the grader is about to enter the running state as a basis for whether the parking brake state is released. When the shift position is in the forward shift position or the reverse shift position, the parking brake state is released through step S212, so that the grader can normally run, and meanwhile, the driver can timely know the brake state of the grader by outputting prompt information corresponding to the parking brake release state. The prompt message includes, but is not limited to, an indicator light signal, a graphic message, or a voice message.
One specific embodiment of the grader parking brake control method described above is provided as follows:
as shown in fig. 6, the grader parking brake control method includes steps S301 to S308. When an on-position signal of a driver is effective (a driver sits on a seat), a service brake pedal is treaded down, when the vehicle speed is 0km/h and the time delay is 1s, a P gear (parking gear) is activated, parking brake is started, a first parking brake is started to operate, and a parking brake indicator lamp is turned on.
And then, starting to monitor the effect of the first parking brake, wherein the monitoring method comprises the following steps: if the parking brake signal is effective, but the monitored vehicle speed is greater than 0km/h, the first parking brake is judged to have a fault, the program executes a second parking brake function, and the second parking brake is started to perform parking brake on the grader. The second parking brake utilizes the internal structure of the gearbox, the transmission ratios of two or more clutches in the same group in the gearbox are different, if the two or more clutches work simultaneously, the clutches with different transmission ratios cannot move with the same transmission ratio, an interference phenomenon occurs, namely, the corresponding output rotating speed is 0rpm, and the parking brake function is realized.
Further, the grader can automatically release the parking brake in the parking brake state. As shown in fig. 7, when the presence signal is valid (the driver sits on the seat) in steps S401 to S403, if the engine speed is 750rpm or more, the shift detection of the F range (forward range) or the R range (reverse range) is performed, and if the F range or the R range is valid, the first parking brake and the second parking brake are controlled to stop, the parking brake and the second parking brake function are automatically released, and the parking brake indicator lamp is turned off.
In the whole process, the parking brake button/switch does not need to be operated manually, and the vehicle can automatically execute parking brake.
When a driver needs to manually control the parking brake function of the land leveler, the driver can pull the button upwards by himself, the first parking brake acts, and the parking brake indicator lamp on the operation panel is turned on. When the parking brake needs to be released, the button is pressed, the first parking brake releases the brake, and the parking brake indicator lamp on the operation panel is turned off. The button is a self-reset button, and the button can be automatically reset after the button is pulled and pressed and the hand is released.
EXAMPLE six
The present embodiment provides a grader parking brake system 1 for implementing the grader parking brake control method in any of the above embodiments. As shown in fig. 8, the grader parking brake system 1 includes a first parking brake 11, a second parking brake 12, a detection assembly 13, and a controller 14.
The first parking brake 11 and the second parking brake 12 may brake the grader, respectively. Wherein the first parking brake 11 may be used as a regular parking brake device, the second parking brake 12 may be used as a spare parking brake device, and the structure and braking principle of the second parking brake 12 are different from those of the first parking brake 11.
The detection assembly 13 is disposed at a plurality of locations of the grader, and is configured to detect a first parameter signal of the grader, such as a vehicle speed signal, a brake pedal position signal, an engine speed signal, a gear signal, and the like, and transmit a detection result to the controller 14. The controller 14 is electrically connected to the gear shift mechanism, the first parking brake 11, the second parking brake 12 and the detection assembly 13 of the motor grader respectively, so as to determine the use state (such as the parking state or the driving state) of the motor grader according to the first parameter signal, and further control the first parking brake 11 and/or the second parking brake 12 to work according to the use state of the motor grader, so as to control the braking state of the motor grader, so that the motor grader can automatically enter the parking braking state when in the parking state, or automatically release the parking braking state when the motor grader is in the driving state or is about to enter the driving state.
The land leveler parking brake system 1 in this embodiment can realize the automatic control of the braking state of the land leveler, does not need a driver to perform manual operation, can effectively improve the safety of the land leveler, is favorable for reducing the possibility of safety accidents, and reduces the influence on the normal construction process.
In addition, the grader parking brake system 1 in this embodiment also has all the beneficial effects of the grader parking brake control method in any of the above embodiments, and the description thereof is omitted here.
EXAMPLE seven
The embodiment provides a grader parking brake system 1, which is further improved on the basis of the sixth embodiment.
As shown in fig. 9 and 10, the first parking brake 11 includes a parking brake clutch 111, the parking brake clutch 111 is disposed corresponding to the output end of the transmission 211, and when parking brake is required, the output end of the transmission 211 is locked by the parking brake clutch 111 to stop output of the transmission 211, so as to implement parking brake, thereby preventing the coasting phenomenon of the motor grader.
Further, as shown in fig. 10 and 11, the second parking brake 12 includes a first transmission clutch 121 and a second transmission clutch 122 provided in a transmission 211 of the motor grader. The first transmission clutch 121 and the second transmission clutch 122 are respectively disposed corresponding to one transmission gear 2111 in the same group in the transmission case, and can be connected to the transmission gear 2111 to operate the transmission gear 2111. When the second parking brake 12 is activated, the first transmission clutch 121 and the second transmission clutch 122 are driven to work simultaneously, so that the two transmission gears 2111 with different transmission ratios in the same group directly interfere with each other, the transmission 211 is mechanically jammed, and the parking brake is realized. Of course, the number of transmission clutches can also be greater than two.
The structure and the braking principle of second parking brake 12 in this embodiment are different from that of first parking brake 11, and can be used as a spare parking brake device, and when first parking brake 11 breaks down, second parking brake 12 can be used for auxiliary braking, so that double guarantee is realized, and the safety of the land leveler is improved.
Example eight
The embodiment provides a grader parking brake system 1, which is further improved on the basis of the sixth embodiment.
As shown in fig. 12, the grader parking brake system 1 further includes a prompting device 15 electrically connected to the controller 14, and the prompting device 15 is capable of operating under the control of the controller 14 and outputting a prompting message corresponding to the braking state of the grader. The prompt information includes but is not limited to an indicator light signal, image-text information or sound information, for example, when the grader enters a parking brake state, the controllable indicator light is turned on, and when the grader releases the parking brake state, the controllable indicator light is turned off to prompt the driver, so that the driver can know the brake state of the grader in time.
In another implementation of this embodiment, as shown in fig. 13, the grader parking brake system 1 further includes a manual operation device 16 electrically connected to the controller 14 for inputting a manual operation signal, so that the grader parking brake system 1 can control the braking state of the grader according to the manual operation signal input by the driver based on the realization of automatic control. For example, the manual operating device 16 may be provided with a manual button, and the first parking brake 11 is activated when the button is pulled upwards, and the first parking brake 11 is deactivated when the button is pressed; the manual button can be a self-reset button, and when the button is pulled or pressed, the button can reset automatically after hands are released.
One specific embodiment of the grader parking brake system 1 described above is provided below:
the present embodiment provides a grader parking brake system 1 for implementing the grader parking brake control method in any of the above embodiments. As shown in fig. 8, the grader parking brake system 1 includes a first parking brake 11, a second parking brake 12, a detection assembly 13, a controller 14, a prompting device 15, and a manual operation device 16.
The first parking brake 11 and the second parking brake 12 may brake the grader, respectively. As shown in fig. 9 and 10, the first parking brake 11 includes a parking brake clutch 111, the parking brake clutch 111 is disposed corresponding to an output end of the transmission 211, and when parking brake is required, the output end of the transmission 211 is locked by the parking brake clutch 111 to stop output of the transmission 211, so that parking brake is realized, and a coasting phenomenon of the motor grader can be prevented. As shown in fig. 10 and 11, the second parking brake 12 includes a first transmission clutch 121 and a second transmission clutch 122 provided in a transmission 211 of the motor grader. The first transmission clutch 121 and the second transmission clutch 122 are respectively disposed corresponding to one transmission gear 2111 in the same group in the transmission case, and can be connected to the transmission gear 2111 to operate the transmission gear 2111. When the second parking brake 12 is activated, the first transmission clutch 121 and the second transmission clutch 122 are driven to work simultaneously, so that the two transmission gears 2111 with different transmission ratios in the same group directly interfere with each other, the transmission 211 is mechanically jammed, and the parking brake is realized. The second parking brake 12 is different from the first parking brake 11 in structure and braking principle, and can be used as a standby parking brake device, when the first parking brake 11 breaks down, the second parking brake 12 can be used for auxiliary braking, double guarantee is realized, and therefore the safety of the land leveler is improved.
The detection assembly 13 is disposed at a plurality of locations of the grader, and is configured to detect a first parameter signal of the grader, such as a vehicle speed signal, a brake pedal position signal, an engine speed signal, a gear signal, and the like, and transmit a detection result to the controller 14. The controller 14 is electrically connected to the gear shift mechanism, the first parking brake 11, the second parking brake 12 and the detection assembly 13 of the motor grader respectively, so as to determine the use state (such as the parking state or the driving state) of the motor grader according to the first parameter signal, and further control the first parking brake 11 and/or the second parking brake 12 to work according to the use state of the motor grader, so as to control the braking state of the motor grader, so that the motor grader can automatically enter the parking braking state when in the parking state, or automatically release the parking braking state when the motor grader is in the driving state or is about to enter the driving state.
As shown in fig. 12, the presentation device 15 is electrically connected to the controller 14 to operate under the control of the controller 14, and outputs a presentation information corresponding to the braking state of the grader. The prompt information includes but is not limited to an indicator light signal, image-text information or sound information, for example, when the grader enters a parking brake state, the controllable indicator light is turned on, and when the grader releases the parking brake state, the controllable indicator light is turned off to prompt the driver, so that the driver can know the brake state of the grader in time.
As shown in fig. 13, the manual operation device 16 is electrically connected to the controller 14 and is configured to input a manual operation signal so that the grader parking brake system 1 can control the braking state of the grader based on the manual operation signal input by the driver even when automatic control is performed. For example, the manual operating device 16 may be provided with a manual button, and the first parking brake 11 is activated when the button is pulled upwards, and the first parking brake 11 is deactivated when the button is pressed; the manual button can be a self-reset button, and when the button is pulled or pressed, the button can reset automatically after hands are released.
The land leveler parking brake system 1 in this embodiment can realize the automatic control of the braking state of the land leveler, does not need a driver to perform manual operation, can effectively improve the safety of the land leveler, is favorable for reducing the possibility of safety accidents, and reduces the influence on the normal construction process.
In addition, the grader parking brake system 1 in this embodiment also has all the beneficial effects of the grader parking brake control method in any of the above embodiments, and the description thereof is omitted here.
Example nine
In the present embodiment, a grader 2 is provided, as shown in fig. 9 and 14, the grader 2 including a grader body 21 and the grader parking brake system 1 of any of the embodiments described above. The grader body 21 is provided with a transmission 211 and a gear shifting mechanism 212, the controller 14 of the grader parking brake system 1 is electrically connected with the gear shifting mechanism 212, the gear shifting mechanism 212 can be controlled to adjust gears, and the first parking brake 11 and/or the second parking brake 12 can also be controlled to act on the transmission 211, so that the grader body 21 can automatically realize parking brake when parking, manual operation is not needed, the phenomenon that the grader body 21 slides can be effectively prevented, and the safety of the grader 2 is improved.
In addition, the grader 2 in this embodiment also has all the advantages of the grader parking brake system 1 in any of the above embodiments, and the description thereof is omitted.
The technical scheme of the invention is described in detail in combination with the accompanying drawings, so that the automatic control of the braking state of the land leveler can be realized, the land leveler can automatically enter the parking braking state when parking, the manual operation of a driver is not needed, the driving operation difficulty of the land leveler can be reduced, the possibility of the land leveler sliding or sliding under the parking state can also be reduced, the method is particularly suitable for the construction process needing to directly and frequently switch between the driving state and the parking state, the possibility of safety accidents can be effectively reduced, and the influence on the normal construction process is reduced.
In embodiments according to the present invention, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. Specific meanings of the above terms in the embodiments according to the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the description of the embodiments according to the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments according to the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the technical aspects of the present application.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example in accordance with the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment according to the present invention, and is not intended to limit the technical solution of the present application, and it is obvious to those skilled in the art that various modifications and changes can be made to the technical solution of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the technical scheme of the application shall be included in the protection scope of the application.
Claims (10)
1. A grader parking brake control method, comprising:
step S100: when the in-place information of the driver is effective, acquiring a first parameter signal of the land leveler;
step S200: and controlling the braking state of the land scraper according to the first parameter signal.
2. The grader parking brake control method according to claim 1,
the step S100: when the driver presence information is valid, acquiring a first parameter signal of the grader, comprising:
step S101: when the on-site information of a driver is effective and a first parking brake and a second parking brake of the grader are in an off state, acquiring a brake pedal position signal and a vehicle speed signal of the grader;
the step S200: controlling the braking state of the grader according to the first parameter signal, including:
step S201: judging whether the brake pedal is in a braking position according to the brake pedal position signal to generate a first judgment result;
if the first determination result is yes, go to step S202; if the first judgment result is no, executing the step S101;
step S202: judging whether the speed of the land leveler is equal to a speed threshold value and continuously exceeds a first duration, and generating a second judgment result;
if the second determination result is yes, step S203 is executed: controlling the gear of the land leveler to be switched to a parking gear, controlling the first parking brake to be started at the same time, and outputting corresponding prompt information;
if the second determination result is negative, the step S101 is executed.
3. The grader parking brake control method according to claim 2, further comprising:
step S205: continuously acquiring a vehicle speed signal of the land scraper, judging whether the vehicle speed of the land scraper is greater than a vehicle speed threshold value or not, and generating a third judgment result;
if the third determination result is yes, step S206 is executed: controlling the second parking brake to be activated;
if the third determination result is negative, step S207 is executed: the current operating state is maintained.
4. The grader parking brake control method according to claim 3, wherein the step S206: controlling the second parking brake to be activated, comprising:
step S208: and controlling at least two transmission clutches with different transmission ratios in the same group in a gearbox of the land scraper to work simultaneously, so that interference is formed between the at least two transmission clutches to realize braking.
5. The grader parking brake control method according to claim 1,
the step S100: when the driver presence information is valid, acquiring a first parameter signal of the grader, comprising:
step S102: when the on-site information of a driver is effective and a first parking brake and/or a second parking brake of the land scraper are/is in an opening state, acquiring an engine speed signal and a gearbox gear signal of the land scraper;
the step S200: controlling the braking state of the grader according to the first parameter signal, including:
step S210: judging whether the engine speed of the land leveler is greater than a speed threshold value or not, and generating a fourth judgment result;
if the fourth determination result is yes, go to step S211; if the fourth determination result is negative, the step S102 is executed;
step S211: judging whether the gear of the gearbox of the land leveler is in a forward gear or a backward gear, and generating a fifth judgment result;
if the fifth determination result is yes, go to step S212: controlling the first parking brake and the second parking brake to stop running and outputting corresponding prompt information;
if the fifth determination result is negative, the step S102 is executed.
6. A grader parking brake system (1) for implementing the grader parking brake control method according to any one of claims 1 to 5, wherein the grader parking brake system (1) comprises:
a first parking brake (11) and a second parking brake (12) provided on the grader (2) for braking the grader (2);
a detection assembly (13) for detecting a first parameter signal of the grader (2);
a controller (14) which is respectively electrically connected with the first parking brake (11), the second parking brake (12) and the detection assembly (13) and controls the first parking brake (11) and/or the second parking brake (12) to work according to the first parameter signal so as to control the braking state of the grader (2);
wherein the controller (14) is electrically connected with a gear shifting mechanism (212) of the grader (2) to control the gear shifting mechanism (212) to shift gears.
7. The motor grader parking brake system (1) according to claim 6, wherein the first parking brake (11) comprises:
the parking brake clutch (111) is arranged at the output end of a transmission (211) of the grader (2), and the parking brake clutch (111) can lock the output end of the transmission (211) to realize braking.
8. The grader parking brake system (1) according to claim 6, characterized in that the second parking brake (12) comprises:
at least two transmission clutches arranged in a transmission (211) of the motor grader (2), wherein each transmission clutch can be connected with one transmission gear (2111) in the same group;
wherein at least two of the transmission clutches are capable of causing mutual interference between at least two of the transmission gears (2111) in the same set to effect braking.
9. The grader parking brake system (1) according to claim 6, further comprising:
the prompting device (15) is arranged on the land leveler (2), and the prompting device (15) is electrically connected with the controller (14) and used for outputting prompting information corresponding to the braking state of the land leveler (2) under the control of the controller (14); and/or
And the manual operation device (16) is arranged on the land leveler (2), and the manual operation device (16) is electrically connected with the controller (14) and used for inputting manual operation instructions corresponding to the first parking brake (11) and the second parking brake (12).
10. A grader (2), comprising:
the land scraper vehicle body (21), the land scraper vehicle body (21) is provided with a transmission (211) and a gear shifting mechanism (212);
the grader parking brake system (1) according to any of claims 6 to 9, provided on the grader body (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110088610.1A CN112677941B (en) | 2021-01-22 | 2021-01-22 | Land leveler parking brake control method, land leveler parking brake system and land leveler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110088610.1A CN112677941B (en) | 2021-01-22 | 2021-01-22 | Land leveler parking brake control method, land leveler parking brake system and land leveler |
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| CN112677941B CN112677941B (en) | 2022-04-29 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040108769A1 (en) * | 2002-12-05 | 2004-06-10 | Marathe Sameer S. | Automatic secondary brake application |
| JP2019078089A (en) * | 2017-10-25 | 2019-05-23 | 日精株式会社 | Lifting device for mechanical parking device |
| CN111348044A (en) * | 2018-12-21 | 2020-06-30 | 丰田自动车株式会社 | Vehicle control device and vehicle with same |
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2021
- 2021-01-22 CN CN202110088610.1A patent/CN112677941B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040108769A1 (en) * | 2002-12-05 | 2004-06-10 | Marathe Sameer S. | Automatic secondary brake application |
| JP2019078089A (en) * | 2017-10-25 | 2019-05-23 | 日精株式会社 | Lifting device for mechanical parking device |
| CN111348044A (en) * | 2018-12-21 | 2020-06-30 | 丰田自动车株式会社 | Vehicle control device and vehicle with same |
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| CN112677941B (en) | 2022-04-29 |
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