CN111412277A - Method for controlling automatic gear shifting of paver, automatic gear shifting control device and paver - Google Patents
Method for controlling automatic gear shifting of paver, automatic gear shifting control device and paver Download PDFInfo
- Publication number
- CN111412277A CN111412277A CN202010264224.9A CN202010264224A CN111412277A CN 111412277 A CN111412277 A CN 111412277A CN 202010264224 A CN202010264224 A CN 202010264224A CN 111412277 A CN111412277 A CN 111412277A
- Authority
- CN
- China
- Prior art keywords
- gear
- gear shifting
- paver
- gearbox
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims description 24
- 230000008859 change Effects 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 241000283973 Oryctolagus cuniculus Species 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 241000270708 Testudinidae Species 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 208000034656 Contusions Diseases 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000009519 contusion Effects 0.000 description 3
- 241000270666 Testudines Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Images
Classifications
-
- 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
- F16H61/0202—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 electric
- F16H61/0204—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 electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
-
- 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
- F16H61/04—Smoothing ratio shift
-
- 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
-
- 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
-
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
-
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Structure Of Transmissions (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention provides a method for controlling automatic gear shifting of a paver, an automatic gear shifting control device and a tire paver. The method for controlling the automatic gear shifting of the paver comprises the following steps: receiving a gear shifting signal; reducing the rotating speed of the input end of a gearbox of the paver according to the gear shifting signal until the rotating speed of the input end of the gearbox reaches a first preset value; detecting the rotating speed of the input end of the gearbox until the rotating speed of the input end of the gearbox reaches a second preset value; executing a gear shifting operation; and according to the gear corresponding to the gear shifting signal, the rotating speed of the input end of the gearbox of the paver is increased. The method for controlling the automatic gear shifting of the paver automatically controls the proper gear shifting time to shift gears through a program, automatically finishes the gear shifting operation, has simple gear shifting mode and labor-saving gear shifting, can realize non-manual parking gear shifting, can reduce the pause and frustration during the gear shifting and improves the smoothness of the gear shifting.
Description
Technical Field
The invention relates to the technical field of engineering vehicle machinery, in particular to a method for controlling automatic gear shifting of a paver, an automatic gear shifting control device for realizing the method for controlling the automatic gear shifting of the paver, and a tire paver comprising the automatic gear shifting control device.
Background
At present, the tire paver is widely used due to the characteristics of good maneuvering flexibility, fast transition, high construction efficiency and the like, and can be used for construction of municipal administration, residential areas and garden roads.
The tire paver is generally divided into a low-speed gear and a high-speed gear, which correspond to a tortoise gear and a rabbit gear, wherein the speed of the tortoise gear is generally 0-24 m/min, and the speed of the rabbit gear is generally 0-10 km/h. The gearbox mainly changes the speed ratio to achieve the switching of high speed and low speed, meets the requirements of different speeds in the driving process, and the switching reliability and smoothness of the gearbox directly influence the driving comfort.
The gear shifting mode of the existing tire paver mainly realizes wheel edge braking or locking of a mechanical gearbox through stepping on a brake in the driving process, and the speed reduction and parking are carried out by returning a pump swash plate to a zero position through handle control. In the process of shifting gears in the parking, when the condition of shifting gears does not reach, shift gears by force and can make the unable normal meshing of gear, lead to the difficulty of shifting gears, shift failure scheduling problem, need the parking to wait moreover, artificial judgement, it is not intelligent.
Disclosure of Invention
In order to ameliorate at least one of the above technical problems, it is an object of the present invention to provide a method of controlling automatic shifting of a paving machine.
Another object of the present invention is to provide an automatic gear shifting control apparatus for implementing the above method of controlling an automatic gear shifting of a paving machine.
Still another object of the present invention is to provide a tire paver including the automatic gear shift control apparatus described above.
In order to achieve the above object, a technical solution of a first aspect of the present invention provides a method for controlling an automatic gear shift of a paver, where the paver includes a variable pump, a hydraulic motor, a transmission case, and a traveling mechanism, and the variable pump, the hydraulic motor, the transmission case, and the traveling mechanism are connected in sequence, and the method includes: step S10: receiving a gear shifting signal; step S20: reducing the rotating speed of the input end of the gearbox of the paver according to the gear shifting signal until the rotating speed of the input end of the gearbox reaches a first preset value; step S30: detecting the rotating speed of the input end of the gearbox until the rotating speed of the input end of the gearbox reaches a second preset value; step S40: executing a gear shifting operation; step S50: and according to the gear corresponding to the gear shifting signal, the rotating speed of the input end of the gearbox of the paver is increased. The scheme provides a method for controlling automatic gear shifting of a paver, a manual gear shifting switching mode is cancelled, whether a gear shifting condition is met or not is judged by a program, corresponding gear shifting operation is executed after the gear shifting condition is met, therefore, a proper gear shifting opportunity can be selected for gear shifting, the pause and contusion during gear shifting is reduced, and the gear shifting smoothness is improved. Meanwhile, the gear shifting is carried out by selecting a proper time, so that the forced gear shifting of a driver can be avoided, the situation that gears in the gearbox cannot be meshed is reduced, the abrasion of the gears is reduced, and the service life of the gearbox is further guaranteed. In addition, the system automatically controls the completion of gear shifting operation, so that the effects of labor saving and convenient operation of gear shifting are facilitated, and the operation intensity of a driver is reduced.
Specifically, firstly, a gear shifting signal is received, after the controller receives the gear shifting signal, the rotating speed of the input end of the gearbox of the paver is reduced according to the gear shifting signal, so that the rotating speed of the input end of the gearbox gradually reaches a gear shifting critical point until the requirement of gear shifting opportunity is met, after the rotating speed of the input end of the gearbox is reduced, whether the gear shifting condition is met or not is detected by detecting the rotating speed of the input end of the gearbox, and after the gear shifting condition is met, the process of automatic gear shifting operation of the paver is realized through gear shifting operation of the controller. Therefore, the possibility of mistaken gear shifting or gear shifting failure of a driver can be reduced, and after the gear shifting operation is completed, the rotating speed of the input end of the gearbox is increased according to the gear corresponding to the gear shifting signal. Compared with manual gear shifting operation, the gear shifting device is simple and convenient to operate, the gear shifting time is proper, and the situations that internal parts of the gearbox are damaged and the motor is burnt can be reduced.
The method for controlling the automatic gear shifting of the paver provided by the invention has the advantages that the paver still normally runs in the process of executing the gear shifting operation, so that the gear shifting can be realized without stopping, waiting for stopping is not needed, the gear shifting time is favorably shortened, the operation process of a driver is favorably simplified, and the labor intensity of the driver is reduced.
In addition, the method for controlling the automatic gear shifting of the paver in the technical scheme provided by the invention also has the following additional technical characteristics:
in the above technical solution, the step S20 specifically includes: and reducing the output flow of a variable pump of the paver according to the gear shifting signal so as to reduce the rotating speed of the input end of a gearbox of the paver until the rotating speed of the input end of the gearbox reaches a first preset value, so that the speed of the paver is reduced to a set value.
In the above technical solution, the threshold interval of the set value is 0 to 3 m/min. In the above technical solution, the variable pump is a swash plate type variable pump; the step of reducing the output flow of the variable pump of the paver according to the gear shifting signal comprises the following steps: and changing the inclination angle of a swash plate of a variable pump of the paver according to the gear shifting signal.
In the above technical solution, the step S30 specifically includes: and wheel edge braking intervention, braking the hydraulic motor, controlling the variable pump to return to the neutral position, and detecting the rotating speed of the input end of the gearbox until the rotating speed of the input end of the gearbox reaches a second preset value, so that the rotating speed of the hydraulic motor is zero.
In the above technical solution, the transmission case includes a free wheel valve group, a plurality of speed change gears adapted to the free wheel valve group, and a shift fork engaged with one of the speed change gears, and the step S40 includes: controlling the free wheel valve group to be electrified, communicating an oil inlet and an oil return port of the hydraulic motor, and enabling the hydraulic motor to be in a free state; releasing wheel edge braking; controlling the shifting fork to axially move so as to switch the engaged speed change gears; wherein the plurality of speed change gears correspond to a plurality of speed stages, respectively.
In the above technical solution, the plurality of speed change gears include a first gear and a second gear, and the step of controlling the shift fork to move axially to switch the engaged speed change gears includes: controlling the shifting fork to be separated from the first gear and controlling the shifting fork to be meshed with the second gear; wherein the transmission ratio of the first gear is greater than the transmission ratio of the second gear or the transmission ratio of the second gear is greater than the transmission ratio of the first gear.
In the above technical solution, step S50 includes: and improving the output flow of a variable pump of the paver to improve the rotating speed of the hydraulic motor.
The technical scheme of the second aspect of the invention provides an automatic gear shifting control device of a paver, which is suitable for realizing the method for controlling the automatic gear shifting of the paver in any one of the technical schemes of the first aspect, and the automatic gear shifting control device comprises: the gear shifting switch is used for sending a gear shifting signal; the controller is connected with the gear shifting switch and used for receiving the gear shifting signal; and the speed detection device is connected with the gearbox of the paver and used for detecting the rotating speed of the input end of the gearbox and sending a detection result to the controller so that the controller controls the paver to shift gears.
The automatic gear shifting control device for the paver according to the second aspect of the present invention is used to implement the method for controlling the automatic gear shifting of the paver according to any of the first aspect of the present invention, so that all the advantages of any of the above-mentioned technical solutions are achieved, and details thereof are not repeated herein.
The technical scheme of the third aspect of the invention provides a tire paver, which comprises: the hydraulic control system comprises a vehicle body, a transmission case, a hydraulic motor and a variable pump, wherein the vehicle body is provided with the transmission case, the hydraulic motor connected with the input end of the transmission case and the variable pump connected with the hydraulic motor; and an automatic shift control device as in the second aspect, connected to the transmission case and the variable displacement pump.
The tire paver provided by the technical scheme of the third aspect of the present invention includes the automatic gear shifting control device of the paver according to any one of the technical schemes of the second aspect, so that all the beneficial effects of any one of the technical schemes described above are achieved, and no further description is given here.
Additional aspects and advantages 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 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 is a block flow diagram of a method of controlling an automatic gear shift of a paving machine according to one embodiment of the invention;
fig. 2 is a block flow diagram of a method of controlling automatic shifting of a paving machine according to one embodiment of the present disclosure;
fig. 3 is a block flow diagram illustrating a step S30 of a method for controlling an automatic gear shift of a paving machine according to one embodiment of the invention;
fig. 4 is a block flow diagram of a method of controlling automatic shifting of a paving machine according to one embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an automatic gear shifting control device of a paving machine according to one embodiment of the invention;
fig. 6 is a schematic diagram of a paving machine according to one embodiment of the invention;
FIG. 7 is a schematic diagram of a partial internal structure of a transmission according to an embodiment of the present invention;
fig. 8 is a partial schematic view of a paving machine according to an embodiment of the invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 5 to 8 is:
10 a shift switch; 20 a controller; 30 speed detection means; 100 automatic shift control means; 200 of a vehicle body; 300 a gearbox; 400 hydraulic motors; 500 variable displacement pumps; 600 drive axle; 700 sprocket wheel; 800 tires; 40 an input shaft; 41 a drive gear; 50 intermediate shafts; 51 a high-speed gear A; 52 low-speed gear A; 60 an output shaft; 61 high-speed gear B; 62 a low-speed gear B; 70 shifting fork.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. 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 the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Some embodiments of the invention are described below with reference to fig. 1-8.
Some embodiments of the present application provide a method of controlling an automatic gear shift of a paving machine.
In some embodiments, as shown in fig. 1, a method of controlling automatic shifting of a paving machine includes: step S10, receiving a gear shifting signal; step S20, reducing the rotating speed of the input end of the gearbox of the paver according to the gear shifting signal until the rotating speed of the input end of the gearbox reaches a first preset value; step S30, detecting the rotating speed of the input end of the gearbox until the rotating speed of the input end of the gearbox reaches a second preset value; step S40, a shift operation is performed; and step S50, increasing the rotating speed of the input end of the gearbox of the paver according to the gear corresponding to the gear shifting signal.
The method for controlling the automatic gear shifting of the paver provided by the embodiment cancels a manual gear shifting switching mode, judges whether the gear shifting condition is met or not according to a program, and executes corresponding gear shifting operation after the gear shifting condition is met. Compared with the mode of stepping on the clutch in the driving process and switching off the power and then shifting the gear by the meshing sleeve, the method for controlling the automatic gear shifting of the paver provided by the embodiment has the advantages that the gear shifting mode is simple, the clutch is not required to be stepped on by a driver, the gear shifting is labor-saving, the operation is light and convenient, and the operation intensity of the driver can be reduced. Compared with the mode of operating gear shifting after parking, the gear shifting device has the advantages that the proper gear shifting time can be selected through the controller to shift, gear shifting operation is automatically completed, pause and contusion during gear shifting can be reduced, smoothness of gear shifting is improved, the situation that gears in the gearbox cannot be meshed is reduced, abrasion of the gears is reduced, and the service life of the gearbox is further guaranteed.
The first preset value and the second preset value are manual set values and can be adjusted according to actual conditions. It is understood that the second preset value is smaller than the first preset value. Through setting up the first default, rationally limited the opportunity of carrying out the braking to the hydraulic motor to reduce the speed of a motor vehicle, thereby be convenient for brake the hydraulic motor when the speed of a motor vehicle is lower, through setting up the second default, then limited the opportunity of carrying out the operation of shifting gears, with the pause and contusion that reduces during the gear shift, improve the smoothness of gear shift. Further, the first preset value is the rotating speed of the input end of the gearbox corresponding to the rotating speed of the hydraulic motor within the range of 0-3 m/min, and the second preset value is the rotating speed of the input end of the gearbox corresponding to the hydraulic motor after the hydraulic motor stops rotating.
In some embodiments, as shown in fig. 2, a method of controlling automatic shifting of a paving machine includes: step S10, receiving a gear shifting signal; step S21, reducing the output flow of a variable pump of the paver according to the gear shifting signal so as to reduce the rotating speed of the input end of a gearbox of the paver until the rotating speed of the input end of the gearbox reaches a first preset value, so that the speed of the paver is reduced to a set value; step S30, detecting the rotating speed of the input end of the gearbox until the rotating speed of the input end of the gearbox reaches a second preset value; step S40, a shift operation is performed; and step S50, increasing the rotating speed of the input end of the gearbox of the paver according to the gear corresponding to the gear shifting signal.
The output flow of the variable pump of the paver is reduced, the rotating speed of the input end of the gearbox of the paver can be effectively reduced, and the realization mode is simple and quick. Meanwhile, when the rotating speed of the input end of the gearbox is low, the speed of the vehicle is low, so that the braking is easier, the friction between the braking device and the wheels can be reduced, the abrasion is reduced, and the service life is prolonged.
Further, the threshold interval of the set value is 0 to 3 m/min.
The speed of a vehicle is reduced to 0-3 m/min, the speed of the vehicle is low, and therefore in the gear shifting process, the condition that gears are meshed and dislocated can be reduced, gear engagement is easier, and the gear shifting smoothness is further improved.
In some embodiments, the variable displacement pump is a swash plate variable displacement pump; as shown in fig. 4, the method for controlling automatic gear shifting of the spreading machine comprises the following steps: and step S22, changing the inclination angle of a swash plate of a variable pump of the paver according to the gear shifting signal to reduce the rotating speed of the input end of a gearbox of the paver until the rotating speed of the input end of the gearbox reaches a first preset value, so that the speed of the paver is reduced to a set value.
On the basis of the above embodiment, further, step S20 is specifically step S22. It can be understood that the swash plate type variable displacement pump has a fast response speed, is helpful to rapidly change the output flow, control the rotation speed of the hydraulic motor, reduce the gear shifting time, and rapidly recover the power after the gear shifting operation is completed. The bidirectional inclined disc type variable pump can control the forward movement or the backward movement of the paver.
In some embodiments, as shown in fig. 4, a method of controlling automatic shifting of a paving machine includes: and step S31, wheel edge brake intervention, control of the variable pump to return to the neutral position, and detection of the rotation speed of the input end of the gearbox are carried out until the rotation speed of the input end of the gearbox reaches a second preset value, so that the rotation speed of the hydraulic motor is zero.
On the basis of the above embodiment, further, step S30 is specifically step S31. The running speed of the paver can be effectively reduced through wheel edge braking intervention, the middle position is returned through a control variable pump, the oil quantity pumped into the hydraulic motor is reduced, and the rotating speed of the hydraulic motor is reduced by matching until the rotating speed of the hydraulic motor is zero. It will be appreciated that a zero speed of the hydraulic motor does not represent zero vehicle speed of the paving machine.
In some embodiments, the step of detecting the rotational speed of the input of the gearbox until the rotational speed of the input of the gearbox reaches the second preset value may be added with the step of determining, for example, whether the rotational speed of the input of the gearbox reaches the second preset value. The gear shifting condition can be determined whether to be met or not in a real-time detection mode, and the gear shifting condition can also be determined whether to be met or not in a judgment mode.
In some embodiments, as shown in fig. 3 and 4, a method of controlling automatic shifting of a paving machine includes: step S41, controlling the free wheel valve group to be electrified, communicating an oil inlet and an oil outlet of the hydraulic motor, and enabling the hydraulic motor to be in a free state; step S42, releasing wheel edge brake; and step S43, controlling the shifting fork to axially move so as to switch the engaged speed change gear and shift gears.
On the basis of the above embodiment, further, step S40 specifically includes step S41, step S42, and step S43. The hydraulic motor is in a free state, and meanwhile the free wheel valve group is controlled to be electrified, so that the paver can continuously run, and the paver does not need to be stopped when the gear is shifted. By releasing the wheel edge brake, the paver can improve the running speed. It is understood that there is no chronological relationship between step S41 and step S42. Step S43 is performed after step S41 and step S42 are completed, and thus the shift operation is completed, so that the jerk during the shift operation can be reduced, and the gear ratio can be freely changed according to different transmission gears to achieve the effect of stepless speed change.
In some embodiments, the plurality of speed change gears includes a first gear and a second gear; the step of controlling the shift fork to move axially to switch the engaged speed change gears includes: controlling the shifting fork to be separated from the first gear and controlling the shifting fork to be meshed with the second gear; wherein the transmission ratio of the first gear is greater than the transmission ratio of the second gear.
Specifically, as shown in fig. 7, the first gear is a high-speed gear a51, a high-speed gear B61, and the second gear is a low-speed gear a52, a low-speed gear B62. At this time, the hydraulic motor is in a free state, the free wheel valve set is powered on, the input shaft 40 drives the driving gear 41 to rotate, the driving gear 41 drives the high-speed gear a51 to rotate, the high-speed gear a51 drives the intermediate shaft 50 to rotate, the intermediate shaft 50 drives the low-speed gear a52 to rotate, the low-speed gear a52 drives the low-speed gear B62 to rotate, and the low-speed gear B62 is meshed with the shifting fork 70 to drive the output shaft 60 to rotate.
The shifting fork 70 moves axially, so that the high-speed gear B61 is meshed with the shifting fork 70, at the moment, the input shaft 40 drives the driving gear 41 to rotate, the driving gear 41 drives the high-speed gear A51 to rotate, the high-speed gear A51 drives the high-speed gear B61 to rotate, the high-speed gear B61 drives the output shaft 60 to rotate, and the low-speed gear is switched to the high-speed gear, so that the non-stop gear shifting operation is realized.
In still other embodiments, the gear ratio of the second gear is greater than the gear ratio of the first gear.
That is, in the present embodiment, the second gear refers to the combination of the high-speed gear a51 and the high-speed gear B61, and the first gear refers to the combination of the low-speed gear a52 and the low-speed gear B62.
Thus, the shift fork 70 can be shifted between the high-speed gear B61 and the low-speed gear B62 to switch the engagement target so that the rotational speed of the input shaft 40 and the rotational speed of the output shaft 60 can be switched between the low speed ratio and the high speed ratio, and the switching from the high rotational speed to the low rotational speed or the switching from the low rotational speed to the high rotational speed can be realized.
In addition, in some cases, the high gear is referred to as a rabbit gear and the low gear is referred to as a turtle gear, so that the paver is switched between the rabbit gear and the turtle gear by shifting between the high gear B61 and the low gear B62 by the shift fork 70. Meanwhile, it can be understood that in some embodiments, the paver may not only have two gears, namely a high-speed gear and a low-speed gear, but also may have a medium-speed gear, and the like, and by setting a plurality of speed change gears with different transmission ratios, switching between the plurality of speed gears can be realized to meet wider construction requirements and construction scenes.
In some embodiments, as shown in fig. 4, a method of controlling automatic shifting of a paving machine includes: and step S51, according to the gear corresponding to the gear shifting signal, increasing the output flow of the variable pump of the paver, so that the rotating speed of the hydraulic motor is increased to the speed corresponding to the gear.
On the basis of the above embodiment, further, step S50 is specifically step S51. The output flow of the variable pump of the paver is improved, so that the rotating speed of the hydraulic motor is improved, and the paver can run at the speed corresponding to the gear after the gear shifting operation is performed.
Some embodiments of the application provide an automatic gear shifting control device 100 of a paver, which is suitable for implementing the method for controlling the automatic gear shifting of the paver in any one of the embodiments.
As shown in fig. 5, the automatic shift control apparatus 100 includes: a shift switch 10 for sending a shift signal; a controller 20 connected to the shift switch 10 for receiving a shift signal; and the speed detection device 30 is connected with the gearbox 300 of the paver, and is used for detecting the rotating speed of the input end of the gearbox 300 and sending the detection result to the controller 20, so that the controller 20 drives the paver to shift gears. The automatic gear shifting control device 100 provided in this embodiment is used for implementing the method for controlling an automatic gear shifting of a paving machine in any of the above embodiments, so that all the beneficial effects of any of the above embodiments are achieved, and details are not repeated herein.
Some embodiments of the present application provide a tire paver.
As shown in fig. 6, the tire paver includes: the hydraulic control system comprises a vehicle body 200, wherein the vehicle body 200 is provided with a gearbox 300, a hydraulic motor 400 connected with the input end of the gearbox 300 and a variable pump 500 connected with the hydraulic motor 400; and the automatic shift control device 100 according to any of the embodiments described above, are connected to the transmission case 300 and the variable displacement pump 500.
The tire paver provided in this embodiment includes the automatic shift control device 100 in any of the above embodiments, so that all the advantages of any of the above embodiments are achieved, and details are not repeated herein.
The following specifically describes the method for controlling the automatic gear shifting of the paver, the automatic gear shifting control device 100, and the specific structure and the working principle of the tire paver, taking a tire paver as an example.
The tire paver is generally used for the construction of municipal roads, residential areas and garden roads, and the tire paver requires high transition speed and reliable braking. The traveling system of the tire paver generally has two structures: hydraulic, hydraulic pressure adds bridge drive formula. The hydraulic bridge drive type mainly comprises a gearbox 300, a drive axle 600, a chain wheel 700, a tire 800 and the like, as shown in fig. 8. The tire paver is generally divided into a low-speed gear and a high-speed gear which respectively correspond to a tortoise gear and a rabbit gear, wherein the speed of the tortoise gear is generally 0-24 m/min, and the speed of the rabbit gear is generally 0-10 km/h. The gearbox 300 mainly changes the speed ratio to achieve the switching between high speed and low speed, meets the requirements of different speeds in the driving process, and directly influences the driving comfort due to the switching reliability and smoothness.
The high-low speed switching mode of the existing tire paver is that the tire paver stops, a clutch or a shifting fork 70 in a gearbox 300 is operated to re-engage a large gear and a small gear, whether gear shifting is successful or not is judged by a program after gear shifting is completed, starting is carried out after the gear shifting is successful, and forward and backward actions are completed; and if the judgment fails, the gear shifting action needs to be carried out again until the judgment succeeds, and then the forward and backward actions are executed. Such a shifting procedure has the limitations of mis-shifting and poor operation comfort.
In order to solve the problems of mistaken gear shifting and improvement of operation comfort, the specific embodiment provides a gear shifting mode without stopping, a manual gear shifting mode is cancelled, automatic judgment is carried out by a program, high-speed and low-speed switching can be carried out after gear shifting conditions are met, and forward and backward actions of the tire paver are completed.
When switching from high speed to low speed mode, the following 3-point judgment condition is executed by the program: 1. firstly, carrying out variable of a pump swash plate to reduce the vehicle speed to 0-3 m/min, then, wheel edge braking intervenes, returning the pump to a middle position, simultaneously, detecting the rotating speed of a motor, and executing a second step when the rotating speed of the motor is 0; 2. executing a gear shift (free wheel valve set is powered); executing the third step; 3. and opening the wheel edge brake. After the conditions are met, the shifting fork 70 of the gearbox 300 moves axially, the position of the first gear set is switched to the position of the second gear set, namely the high speed ratio is switched to the low speed ratio, speed switching is achieved, and the opening of the swash plate of the pump is controlled according to the speed on the knob until the set speed is achieved.
When switching from low speed to high speed mode, the following 3-point judgment condition is executed by the program: 1. firstly, carrying out variable of a pump swash plate to reduce the vehicle speed to 0-3 m/min, then, wheel edge braking intervenes, pumping back to a middle position, simultaneously, detecting the rotating speed of a motor (namely a hydraulic motor), and executing a second step when the rotating speed of the motor is 0; 2. executing a gear shift (energizing a freewheel valve set); executing the third step; 3. and opening the wheel edge brake. After the conditions are met, the shifting fork 70 of the gearbox 300 moves axially, the position of the second gear set is switched to the position of the first gear set, namely the small speed ratio is switched to the large speed ratio, speed switching is achieved, and the opening of the swash plate of the pump is controlled according to the speed on the knob until the set speed is achieved.
In summary, the method for controlling the automatic gear shifting of the paver provided by this embodiment has at least the following advantages: the gear shifting operation is automatically completed by automatically selecting a proper gear shifting opportunity through a program, the gear shifting mode is simple, gear shifting is labor-saving, the gear shifting without stopping can be realized, the impact generated by gear shifting during stopping can be reduced, and the driving comfort is improved.
In the present invention, the terms "first", "second", and "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. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to 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 description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
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 of 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 description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a method for controlling paver automatic shifting, the paver includes variable pump, hydraulic motor, gearbox and running gear, variable pump, hydraulic motor, gearbox and running gear connect gradually, its characterized in that, the method includes:
step S10: receiving a gear shifting signal;
step S20: reducing the rotating speed of the input end of the gearbox of the paver according to the gear shifting signal until the rotating speed of the input end of the gearbox reaches a first preset value;
step S30: detecting the rotating speed of the input end of the gearbox until the rotating speed of the input end of the gearbox reaches a second preset value;
step S40: executing a gear shifting operation;
step S50: and according to the gear corresponding to the gear shifting signal, the rotating speed of the input end of the gearbox of the paver is increased.
2. The method for controlling automatic gear shifting of the paving machine as claimed in claim 1, wherein the step S20 specifically comprises:
and reducing the output flow of a variable pump of the paver according to the gear shifting signal so as to reduce the rotating speed of the input end of a gearbox of the paver until the rotating speed of the input end of the gearbox reaches a first preset value, so that the speed of the paver is reduced to a set value.
3. The method of claim 2, wherein the step of controlling the automatic gear shifting of the paver is performed by the control unit,
the threshold interval of the set value is 0 to 3 m/min.
4. The method of claim 2, wherein the step of controlling the automatic gear shifting of the paver is performed by the control unit,
the variable pump is a swash plate type variable pump;
the step of reducing the output flow of the variable pump of the paver according to the gear shifting signal comprises the following steps: and changing the inclination angle of a swash plate of a variable pump of the paver according to the gear shifting signal.
5. The method for controlling automatic gear shifting of a paving machine as claimed in any one of claims 2-4, wherein the step S30 specifically comprises:
and wheel edge braking is involved, the variable pump is controlled to return to the middle position, the rotating speed of the input end of the gearbox is detected until the rotating speed of the input end of the gearbox reaches a second preset value, and the rotating speed of the hydraulic motor is enabled to be zero.
6. The method for controlling automatic gear shifting of a paving machine as claimed in any one of claims 2-4, characterized in that,
the gearbox comprises a free wheel valve group, a plurality of speed change gears matched with the free wheel valve group and a shifting fork meshed with one of the speed change gears;
the step S40 includes:
controlling the free wheel valve group to be electrified, communicating an oil inlet and an oil return port of the hydraulic motor, and enabling the hydraulic motor to be in a free state;
releasing wheel edge braking;
controlling the shifting fork to axially move so as to switch the engaged speed change gears and shift gears;
wherein the plurality of speed change gears correspond to a plurality of speed stages, respectively.
7. The method of claim 6, wherein the step of controlling the automatic gear shifting of the paver is performed by the control unit,
the plurality of speed change gears includes a first gear and a second gear;
the step of controlling the shift fork to move axially to switch the engaged speed change gears includes: controlling the shifting fork to be separated from the first gear and controlling the shifting fork to be meshed with the second gear;
wherein the transmission ratio of the first gear is greater than the transmission ratio of the second gear or the transmission ratio of the second gear is greater than the transmission ratio of the first gear.
8. The method for controlling automatic gear shifting of a paving machine as claimed in any one of claims 1-4, wherein the step S50 includes:
and according to the gear corresponding to the gear shifting signal, the output flow of a variable pump of the paver is increased, so that the rotating speed of the hydraulic motor is increased to the speed corresponding to the gear.
9. An automatic gear-shifting control device of a paver, which is suitable for realizing the method for controlling the automatic gear-shifting of the paver according to any one of claims 1 to 8, characterized in that the automatic gear-shifting control device comprises:
the gear shifting switch is used for sending a gear shifting signal;
the controller is connected with the gear shifting switch and used for receiving the gear shifting signal;
and the speed detection device is connected with the gearbox of the paver and used for detecting the rotating speed of the input end of the gearbox and sending a detection result to the controller so that the controller controls the paver to shift gears.
10. A tire paver, characterized by comprising:
the hydraulic control system comprises a vehicle body, a transmission case, a hydraulic motor and a variable pump, wherein the vehicle body is provided with the transmission case, the hydraulic motor connected with the input end of the transmission case and the variable pump connected with the hydraulic motor; and
the automated shift control device of a paving machine of claim 9 coupled to the gearbox and the variable displacement pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264224.9A CN111412277B (en) | 2020-04-07 | 2020-04-07 | Method for controlling automatic gear shifting of paver, automatic gear shifting control device and paver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264224.9A CN111412277B (en) | 2020-04-07 | 2020-04-07 | Method for controlling automatic gear shifting of paver, automatic gear shifting control device and paver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111412277A true CN111412277A (en) | 2020-07-14 |
| CN111412277B CN111412277B (en) | 2022-02-18 |
Family
ID=71489578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010264224.9A Active CN111412277B (en) | 2020-04-07 | 2020-04-07 | Method for controlling automatic gear shifting of paver, automatic gear shifting control device and paver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111412277B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685538A (en) * | 2021-08-18 | 2021-11-23 | 潍柴动力股份有限公司 | HMCVT high-low gear self-adaption method, continuously variable transmission and tractor |
| CN114411864A (en) * | 2021-12-31 | 2022-04-29 | 山推工程机械股份有限公司 | Gear shifting control system, bulldozer and gear shifting control method |
| CN115306891A (en) * | 2022-06-30 | 2022-11-08 | 东风汽车集团股份有限公司 | Debugging method of gear shifting equipment, control system and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001324015A (en) * | 2000-05-18 | 2001-11-22 | Ishikawajima Shibaura Mach Co Ltd | Transmission |
| CN104791482A (en) * | 2015-04-01 | 2015-07-22 | 洛阳理工学院 | Power matching method for hydrostatic system and power gear-shift speed changing box |
| CN106763743A (en) * | 2016-12-26 | 2017-05-31 | 潍柴动力股份有限公司 | A kind of hydrostatic transmissions move gear-shifting control method and system |
| CN110422162A (en) * | 2019-08-14 | 2019-11-08 | 上海宏英智能科技有限公司 | A kind of sliding loader hydraulic moving electric-control system and method |
| CN110594409A (en) * | 2019-10-18 | 2019-12-20 | 三一汽车制造有限公司 | Flexible gear shifting hydraulic system and control method thereof and engineering machinery |
| CN110803145A (en) * | 2019-11-12 | 2020-02-18 | 三一汽车制造有限公司 | Braking system of road roller, road roller and control method |
-
2020
- 2020-04-07 CN CN202010264224.9A patent/CN111412277B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001324015A (en) * | 2000-05-18 | 2001-11-22 | Ishikawajima Shibaura Mach Co Ltd | Transmission |
| CN104791482A (en) * | 2015-04-01 | 2015-07-22 | 洛阳理工学院 | Power matching method for hydrostatic system and power gear-shift speed changing box |
| CN106763743A (en) * | 2016-12-26 | 2017-05-31 | 潍柴动力股份有限公司 | A kind of hydrostatic transmissions move gear-shifting control method and system |
| CN110422162A (en) * | 2019-08-14 | 2019-11-08 | 上海宏英智能科技有限公司 | A kind of sliding loader hydraulic moving electric-control system and method |
| CN110594409A (en) * | 2019-10-18 | 2019-12-20 | 三一汽车制造有限公司 | Flexible gear shifting hydraulic system and control method thereof and engineering machinery |
| CN110803145A (en) * | 2019-11-12 | 2020-02-18 | 三一汽车制造有限公司 | Braking system of road roller, road roller and control method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685538A (en) * | 2021-08-18 | 2021-11-23 | 潍柴动力股份有限公司 | HMCVT high-low gear self-adaption method, continuously variable transmission and tractor |
| CN114411864A (en) * | 2021-12-31 | 2022-04-29 | 山推工程机械股份有限公司 | Gear shifting control system, bulldozer and gear shifting control method |
| CN115306891A (en) * | 2022-06-30 | 2022-11-08 | 东风汽车集团股份有限公司 | Debugging method of gear shifting equipment, control system and storage medium |
| CN115306891B (en) * | 2022-06-30 | 2023-10-20 | 东风汽车集团股份有限公司 | Debugging method, control system and storage medium of gear shifting equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111412277B (en) | 2022-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111412277B (en) | Method for controlling automatic gear shifting of paver, automatic gear shifting control device and paver | |
| US9644547B2 (en) | Engine control device for work vehicle | |
| KR101740745B1 (en) | Apparatus for controlling number of revolutions of engine for industrial vehicle | |
| US8655557B2 (en) | Motor control device for working vehicle | |
| US9222581B2 (en) | Continuously variable transmission control system for vehicle and work vehicle | |
| KR20090083485A (en) | Speed change control system for industrial vehicle | |
| KR20090083486A (en) | Speed change control system for industrial vehicle | |
| US20120089307A1 (en) | Work Vehicle Control Device | |
| CN111075922A (en) | Walking automatic gear shifting control method of wheel excavator | |
| CN114001152B (en) | Road roller gear shifting control device and road roller gear shifting control method | |
| KR20050120671A (en) | Drive train for a mobile vehicle and method for controlling said drive train | |
| EP3933121A1 (en) | System for controlling a propulsion system of a work or agricultural vehicle | |
| WO2013066837A1 (en) | Hystat drive system having engine speed control | |
| JP4300218B2 (en) | Gear control unit for vehicle drivetrain transmission | |
| CN106704576A (en) | Automatic clutch control system used for automobile manual transmission | |
| CN209983076U (en) | Intelligent high-speed rice transplanter with automatic transmission returning to neutral position during braking | |
| CN100357143C (en) | Start-from-stop engine torque limiting | |
| US6241066B1 (en) | Working vehicle | |
| JP2000097323A (en) | Working vehicle and method for controlling clutch of working vehicle | |
| JP2002295528A (en) | Speed control device for vehicle | |
| JP3495294B2 (en) | Transmission operation unit structure of traveling transmission | |
| CN113606334B (en) | Gearbox gear shifting hydraulic system and gearbox gear shifting hydraulic control method | |
| RU2712725C1 (en) | Automatic transmission control method | |
| US11951827B2 (en) | Work vehicle | |
| JPH08189560A (en) | Method and equipment for selectively controlling optimum gear ratio |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| OL01 | Intention to license declared | ||
| OL01 | Intention to license declared | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20200714 Assignee: Hunan Sany Zhongyi Machinery Co.,Ltd. Assignor: Sany Automobile Manufacturing Co.,Ltd. Contract record no.: X2024980007006 Denomination of invention: Method for controlling automatic shifting of pavers, automatic shifting control device, and paver Granted publication date: 20220218 License type: Common License Record date: 20240612 |