CN112878411A - Walking system of loader, loader and operation control method - Google Patents
Walking system of loader, loader and operation control method Download PDFInfo
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- CN112878411A CN112878411A CN202110247128.8A CN202110247128A CN112878411A CN 112878411 A CN112878411 A CN 112878411A CN 202110247128 A CN202110247128 A CN 202110247128A CN 112878411 A CN112878411 A CN 112878411A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 162
- 230000005540 biological transmission Effects 0.000 claims abstract description 80
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2253—Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention relates to the technical field of engineering machinery, in particular to a walking system of a loader, the loader and an operation control method, wherein the walking system of the loader comprises: the driving assembly comprises a walking motor and a transmission gear box, an output shaft of the walking motor is in transmission connection with the transmission gear box, an output end of the transmission gear box is in transmission connection with a walking wheel of the loader, and the transmission gear box comprises two gears; the oil supply assembly comprises an oil tank and an oil supply pump, hydraulic oil is contained in the oil tank, and an oil inlet of the oil supply pump is communicated with the oil tank; and the gear control assembly comprises a gear reversing piece, a first gear clutch and a second gear clutch, the first gear clutch and the second gear clutch are arranged in the transmission gear box, and the gear reversing piece is communicated with the oil supply pump. The invention can improve the transmission efficiency, reduce the abrasion of the mechanical brake and ensure the normal work of the loader.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a walking system of a loader, the loader and an operation control method.
Background
At present, a loader driving assembly consists of an internal combustion engine, a hydraulic torque converter and a transmission assembly. The power source is from the internal-combustion engine, and after the torque and the rotating speed are adjusted by the hydraulic torque converter and the gearbox assembly, the power source is transmitted to the wheels of the drive axle so as to realize the functions of walking and shoveling operation of the loader.
However, in the driving mode, energy conversion is performed twice in the power transmission process, and the mechanical energy of the internal combustion engine is converted into the internal energy of the liquid and then is converted into the mechanical energy again. The efficiency of hydraulic transmission is low, the dynamic braking capability of the hydraulic transmission is poor, and the maximum braking torque is only about one third of the driving torque. Therefore, mechanical brakes on wheels of the hydraulic loader are frequently used, the hydraulic loader is worn quickly, and the output torque and the rotation speed of an engine fluctuate greatly in the process of walking and shoveling operation, so that the impact on a transmission system is large, and the loader cannot work normally for a long time.
Therefore, a walking system of a loader, and a work control method are needed to solve the above-mentioned technical problems.
Disclosure of Invention
The invention aims to provide a walking system of a loader, the loader and an operation control method, which can improve the transmission efficiency, reduce the abrasion of a mechanical brake and ensure the normal work of the loader.
In order to achieve the purpose, the invention adopts the following technical scheme:
a travel system for a loader comprising:
the driving assembly comprises a walking motor and a transmission gear box, an output shaft of the walking motor is in transmission connection with the transmission gear box, an output end of the transmission gear box is in transmission connection with a walking wheel of the loader, and the transmission gear box comprises two gears;
the oil supply assembly comprises an oil tank and an oil supply pump, hydraulic oil is contained in the oil tank, and an oil inlet of the oil supply pump is communicated with the oil tank;
keep off position control assembly, keep off the clutch and keep off the clutch including keeping off position switching-over piece, one, keep off the clutch with it all sets up to keep off the clutch in the transmission gear box, keep off position switching-over piece with the fuel feeding pump intercommunication, it can control to keep off position switching-over piece one keeps off clutch work and makes the transmission gear box is in first fender position, or control keep off clutch work, make the transmission gear box is in the second and keeps off the position.
Further, the gear reversing piece comprises a gear control valve, an oil inlet of the gear control valve is communicated with the oil supply pump, a first control oil port of the gear control valve is communicated with the first gear clutch, a second control oil port of the gear control valve is communicated with the second gear clutch, an oil return port of the gear control valve is communicated with the oil tank, and the gear control valve is configured to: the first control oil port is communicated with the oil supply pump, the second control oil port is communicated with the oil tank, or the second control oil port is communicated with the oil supply pump, and the first control oil port is communicated with the oil tank.
The gear reversing piece further comprises a first pilot control valve, an oil inlet of the first pilot control valve is communicated with the oil supply pump, a control oil port of the first pilot control valve is communicated with a first pilot oil port of the gear control valve, an oil return port of the first pilot control valve is communicated with the oil tank, the first pilot control valve can control the first control oil port to be communicated with the oil inlet of the gear control valve, and the second control oil port is communicated with the oil tank.
The oil inlet of the second pilot control valve is communicated with the oil supply pump, the control oil port of the second pilot control valve is communicated with the second pilot oil port of the gear control valve, the oil return port of the second pilot control valve is communicated with the oil tank, the second pilot control valve can control the second control oil port to be communicated with the oil inlet of the gear control valve, and the first control oil port is communicated with the oil tank.
Further, the transmission gear box comprises a gear box body, a first gear transmission assembly, a second gear transmission assembly, an intermediate gear and an output gear;
the first gear transmission assembly, the second gear transmission assembly, the intermediate gear and the output gear are all arranged in the gear box body;
the intermediate gear with the output gear meshing, the output gear with walking wheel transmission is connected, keep off drive assembly with two keep off drive assembly all with the output shaft of walking motor, one keep off the clutch and can make one keep off drive assembly and drive the intermediate gear rotates and drives the output gear, two keep off the clutch and can make two keep off drive assembly and drive the intermediate gear rotates and drives output gear.
Further, the first gear transmission assembly comprises:
the first gear driving wheel is in transmission connection with an output shaft of the walking motor;
the first gear ring is arranged on the inner wall of the gear box body;
one keeps off the planet wheel, with one keeps off the action wheel meshing, one keeps off the planet wheel setting on the planet carrier, the planet carrier with intermediate gear fixed connection, one keeps off the clutch can drive one keep off the planet wheel with one keeps off the ring gear meshing.
Furthermore, the second gear transmission assembly comprises a second gear driving wheel, and the second gear clutch can drive the second gear driving wheel to be connected with the intermediate gear.
Further, an oil filter is arranged between the oil tank and the oil supply pump, one end of the oil filter is communicated with the oil tank, and the other end of the oil filter is communicated with the oil supply pump.
A loader comprising thereon a walking system of a loader as described above.
A work control method of a loader for controlling the work of the loader as described above, comprising the steps of:
s1, starting the loader, starting the oil supply pump, and controlling the first-gear clutch to work by the gear control piece;
s2, starting a walking motor, and moving the loader;
s3, when the vehicle speed reaches a first set value, the walking motor adjusts the torque to the first set value, and the gear control piece controls the second gear clutch to work;
s4, shoveling materials by the loader;
s5, when the vehicle speed is reduced to a second set value, the walking motor adjusts the torque to the second set value, and the gear control piece controls the first gear clutch to work;
s6, when the vehicle speed is reduced to a third set value, the walking motor adjusts the current output power of the walking motor, so that the current output power is larger than the rated power to work, and the walking motor works for a set time length under the current output power;
and S7, stopping shoveling the materials, and transferring the materials.
The invention has the beneficial effects that:
according to the walking system of the loader and the loader, the walking motor is adopted to directly drive the transmission gear box, and the transmission gear box drives the walking wheel of the loader, so that the walking of the loader is realized; the transmission gear box is directly driven by the walking motor, and the output shaft of the walking motor can be locked when the walking motor stops working, so that the braking capability of the transmission gear box is ensured, and the use of a mechanical brake is reduced; in the process of walking and shovel loading operation, the speed of the loader is controlled through the first gear clutch and the second gear clutch, so that the torque and the rotating speed of the walking motor are adjusted, and the normal work of the loader is ensured.
The operation control method of the loader provided by the invention can control the walking speed according to whether the shoveling operation is carried out or not, thereby ensuring the normal work of the loader.
Drawings
FIG. 1 is a schematic diagram of a travel system of a loader of the present invention;
fig. 2 is a flowchart of an operation control method of a loader according to the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to improve the transmission efficiency of the traveling system of the reversed loader and reduce the abrasion of a mechanical brake, the invention provides a traveling system of a loader, as shown in fig. 1. This traveling system includes: the device comprises a driving assembly 1, an oil supply assembly 2 and a gear control assembly.
The driving assembly 1 comprises a walking motor 11 and a transmission gear box, an output shaft of the walking motor 11 is in transmission connection with the transmission gear box, an output end of the transmission gear box is in transmission connection with a walking wheel of the loader, and the transmission gear box comprises two gears; the oil supply assembly 2 comprises an oil tank 21 and an oil supply pump 23, hydraulic oil is contained in the oil tank 21, and an oil inlet of the oil supply pump 23 is communicated with the oil tank 21; the gear control assembly comprises a gear reversing piece, a first gear clutch and a second gear clutch, the first gear clutch and the second gear clutch are both arranged in the transmission gear box, the gear reversing piece is communicated with the oil supply pump 23, and the gear reversing piece can control the first gear clutch to work so that the transmission gear box is in a first gear or control the second gear clutch to work so that the transmission gear box is in a second gear.
Because a hydraulic torque converter is not needed, the energy loss caused in the transmission conversion process is reduced, and the transmission efficiency is improved; the walking motor 11 is adopted to directly drive the transmission gear box, and the output shaft of the walking motor 11 can be locked when the walking motor 11 stops working, so that the braking capability of the transmission gear box is ensured, and the use of a mechanical brake is reduced; in the process of walking and shovel loading operation, the speed of the loader is controlled through the first gear clutch and the second gear clutch, so that the torque and the rotating speed of the walking motor 11 are adjusted, and the normal work of the loader is ensured.
Further, the gear reversing element comprises a gear control valve 24, an oil inlet of the gear control valve 24 is communicated with the oil supply pump 23, a first control oil port of the gear control valve 24 is communicated with a first gear clutch, a second control oil port of the gear control valve 24 is communicated with a second gear clutch, an oil return port of the gear control valve 24 is communicated with the oil tank 21, and the gear control valve 24 is configured to: the first control oil port is communicated with the oil supply pump 23, the second control oil port is communicated with the oil tank 21, or the second control oil port is communicated with the oil supply pump 23, and the first control oil port is communicated with the oil tank 21. The first gear clutch or the second gear clutch can be controlled to work by controlling the gear control valve 24, so that the running speed of the loader can be controlled, the flexibility of conversion between the first gear and the second gear can be realized by adopting hydraulic control, and the mechanical impact is reduced.
Further, the gear reversing piece further comprises a first pilot control valve 25, an oil inlet of the first pilot control valve 25 is communicated with the oil supply pump 23, a control oil port of the first pilot control valve 25 is communicated with a first pilot oil port of the gear control valve 24, an oil return port of the first pilot control valve 25 is communicated with the oil tank 21, the first pilot control valve 25 can control the first control oil port to be communicated with the oil inlet of the gear control valve 24, and a second control oil port is communicated with the oil tank 21. Through setting up first pilot control valve 25, when controlling first fender clutch work, at first control first pilot control valve 25's control hydraulic fluid port and oil inlet intercommunication, hydraulic oil gets into the shift control valve through first pilot control valve 25, promotes the main valve core action of shift control valve for the first control hydraulic fluid port of shift control valve and the oil inlet intercommunication of fender position control valve 24. Through the setting, the main valve core of the gear shifting control valve is ensured to be slowly opened, hydraulic oil is prevented from directly and rapidly flowing into a gear clutch in a large quantity, impact is caused to the gear clutch, and therefore the safety and the stability of control over the gear clutch are improved.
Similarly, the gear reversing element further comprises a second pilot control valve 26, an oil inlet of the second pilot control valve 26 is communicated with the oil supply pump 23, a control oil port of the second pilot control valve 26 is communicated with a second pilot oil port of the gear control valve 24, an oil return port of the second pilot control valve 26 is communicated with the oil tank 21, the second pilot control valve 26 can control the second control oil port to be communicated with the oil inlet of the gear control valve 24, and the first control oil port is communicated with the oil tank 21. Through the setting, the main valve core of the gear-shifting control valve is ensured to be slowly opened, hydraulic oil is prevented from directly and rapidly flowing into the two-gear clutch in a large quantity, impact is caused to the two-gear clutch, and therefore the safety and the stability of the control of the two-gear clutch are improved.
Further, the transmission gear box comprises a gear box body 18, a first gear transmission assembly, a second gear transmission assembly, an intermediate gear 16 and an output gear 17; the first gear transmission assembly, the second gear transmission assembly, the intermediate gear 16 and the output gear 17 are all arranged in a gear box body 18; the intermediate gear 16 is meshed with the output gear 17, the output gear 17 is in transmission connection with the traveling wheel, the first gear transmission assembly and the second gear transmission assembly are both connected with an output shaft of the traveling motor 11, the first gear clutch can enable the first gear transmission assembly to drive the intermediate gear 16 to rotate to drive the output gear 17, and the second gear clutch can enable the second gear transmission assembly to drive the intermediate gear 16 to rotate to drive the output gear 17. Two keep off the control through controlling one keep off the clutch and can realize two fender control, need not to park at the in-process that one keeps off the clutch and keep off the clutch and switch over moreover and shift, can directly shift gears at the in-process of walking, avoid the power interruption of the in-process of shifting gears, guarantee that the in-process of shifting gears does not have the impact of shifting gears, guarantee loader normal work.
Specifically, the first gear transmission assembly comprises: a first gear ring gear 13, a first gear driving wheel 12 and a first gear planetary wheel 14. The first gear ring 13 is fixedly arranged on the inner wall of the gear box body 18; the first gear driving wheel 12 is in transmission connection with an output shaft of the walking motor 11; the first-gear planet wheel 14 is meshed with the first-gear driving wheel 12, the first-gear planet wheel 14 is arranged on a planet carrier, the planet carrier is fixedly connected with the intermediate gear 16, and the first-gear clutch can drive the first-gear planet wheel 14 to be meshed with the first-gear ring gear 13. The first-gear planetary gear 14 is controlled to be meshed with the first-gear ring gear 13 through the first-gear clutch, so that power is output through the first-gear driving wheel 12, the first-gear planetary gear 14, the intermediate gear 16 and the output gear 17.
Further, the second gear transmission assembly comprises a second gear driving wheel 15, and the second gear clutch can drive the second gear driving wheel 15 to be connected with the intermediate gear 16. The second gear clutch can output power through the second gear driving gear, the intermediate gear 16 and the output gear, so that second gear control is realized. In the gear shifting process, only the corresponding first-gear clutch or second-gear clutch needs to be controlled, so that the gear shifting in the driving process can be realized.
Further, an oil strainer 22 is provided between the oil tank 21 and the oil supply pump 23, and one end of the oil strainer 22 communicates with the oil tank 21 and the other end communicates with the oil supply pump 23. By providing the oil filter 22, impurities and the like in the hydraulic oil can be filtered out, thereby ensuring the cleanliness of the hydraulic oil entering the oil feed pump 23 and other hydraulic components.
Further, an oil outlet of the oil supply pump 23 is provided with a check valve and an overflow valve, and the check valve can prevent the oil supply pump 23 from working effectively due to backflow of hydraulic oil; the safety of the whole hydraulic pipeline can be guaranteed by the overflow valve, and safety accidents caused by overlarge pressure are prevented.
Furthermore, the traveling system of the loader further comprises an accelerator pedal 32 and a brake pedal 31, both the accelerator pedal 32 and the brake pedal 31 are electrically connected with an MCU3(Microcontroller Unit Microcontroller), and the MCU3 can control the traveling motor 11, the oil supply pump 23, the first pilot control valve 25 and the second pilot control valve 26 to operate, so that after a driver sends an acceleration or braking signal, the traveling motor 11, the oil supply pump 23, the first pilot control valve 25 and the second pilot control valve 26 are controlled to operate to realize speed adjustment or braking.
The embodiment also provides a loader, which comprises the walking system of the loader, so that the transmission efficiency of the walking system can be improved, the abrasion of a mechanical brake is reduced, and the normal work of the loader is ensured.
As shown in fig. 2, the present embodiment further provides a method for controlling operations of a loader, which is used for controlling operations of the loader, and includes the following steps:
s1, starting the loader, starting the oil supply pump 23, and controlling the first-gear clutch to work by the gear control piece;
s2, starting the walking motor 11, and moving the loader;
s3, when the vehicle speed reaches a first set value, the walking motor 11 adjusts the torque to the first set value, and the gear control piece controls the second gear clutch to work; work under two grades, the speed of loader is greater than the speed under one grade to guarantee that the loader can reach fast by the material of waiting to transport.
S4, shoveling materials by a loader; the loader shovels the materials into the loader at two working positions and can quickly rush into the loader at a high speed, so that the materials are shoveled into the loader quickly, and the loading speed is increased.
S5, when the vehicle speed is reduced to a second set value, the walking motor 11 adjusts the torque to the second set value, and the gear control piece controls the first gear clutch to work; because the loader receives the resistance of material when dashing into the loading material to make the speed of a motor vehicle drop to the second setting value, at this moment, need increase walking motor 11's moment of torsion reduction speed and carry out the shovel and load the operation.
S6, when the vehicle speed is reduced to a third set value, the walking motor 11 adjusts the current output power of the walking motor 11, so that the current output power is larger than the rated power to work, and the walking motor works for a set time under the current output power; when the speed of a vehicle drops to the third set value, the walking motor 11 can not meet the loading requirement in the normal working mode, and the walking motor 11 is controlled to work for a set time under the excess rated power, so that the shoveling operation is further ensured to be carried out smoothly, and more materials can be shoveled in a short time.
And S7, stopping shoveling the materials, and transferring the materials. The set time length can prevent the walking motor 11 from being damaged due to the fact that the walking motor 11 is excessively powered and runs for a long time.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A travel system for a loader, comprising:
the driving assembly (1) comprises a walking motor (11) and a transmission gear box, an output shaft of the walking motor (11) is in transmission connection with the transmission gear box, an output end of the transmission gear box is in transmission connection with a walking wheel of the loader, and the transmission gear box comprises two gears;
the oil supply assembly (2) comprises an oil tank (21) and an oil supply pump (23), hydraulic oil is contained in the oil tank (21), and an oil inlet of the oil supply pump (23) is communicated with the oil tank (21);
keep off position control assembly, keep off the clutch and keep off the clutch including keeping off position switching-over piece, one, keep off the clutch with it all sets up to keep off the clutch in the transmission gear box, keep off position switching-over piece with fuel feed pump (23) intercommunication, it can control to keep off position switching-over piece one keeps off clutch work and makes the transmission gear box is in first fender position, or control keep off the clutch work, make the transmission gear box is in the second and keeps off the position.
2. The traveling system of a loader according to claim 1, wherein the gear selector comprises a gear control valve (24), an oil inlet of the gear control valve (24) is communicated with the oil supply pump (23), a first control oil port of the gear control valve (24) is communicated with the first gear clutch, a second control oil port of the gear control valve (24) is communicated with the second gear clutch, an oil return port of the gear control valve (24) is communicated with the oil tank (21), and the gear control valve (24) is configured to: the first control oil port is communicated with the oil supply pump (23), the second control oil port is communicated with the oil tank (21), or the second control oil port is communicated with the oil supply pump (23), and the first control oil port is communicated with the oil tank (21).
3. The traveling system of a loader as claimed in claim 2, wherein the gear reversing element further comprises a first pilot control valve (25), the oil inlet of the first pilot control valve (25) is communicated with the oil supply pump (23), the control oil port of the first pilot control valve (25) is communicated with the first pilot oil port of the gear control valve (24), the oil return port of the first pilot control valve (25) is communicated with the oil tank (21), the first pilot control valve (25) can control the first control oil port to be communicated with the oil inlet of the gear control valve (24), and the second control oil port is communicated with the oil tank (21).
4. The traveling system of a loader as claimed in claim 2, wherein the gear reversing element further comprises a second pilot control valve (26), the oil inlet of the second pilot control valve (26) is communicated with the oil supply pump (23), the control oil port of the second pilot control valve (26) is communicated with the second pilot oil port of the gear control valve (24), the oil return port of the second pilot control valve (26) is communicated with the oil tank (21), the second pilot control valve (26) can control the second control oil port to be communicated with the oil inlet of the gear control valve (24), and the first control oil port is communicated with the oil tank (21).
5. The walking system of a loader as claimed in claim 1, wherein the transmission gearbox comprises a gearbox housing (18), a first gear transmission assembly, a second gear transmission assembly, an intermediate gear (16) and an output gear (17);
the first gear transmission assembly, the second gear transmission assembly, the intermediate gear (16) and the output gear (17) are all arranged in the gear box body (18);
intermediate gear (16) with output gear (17) meshing, output gear (17) with walking wheel transmission is connected, keep off drive assembly with keep off drive assembly all with the output shaft of walking motor (11), keep off the clutch and can make one keep off drive assembly and drive intermediate gear (16) rotate and drive output gear (17), two keep off the clutch and can make two drive assembly drive intermediate gear (16) rotate and drive output gear (17).
6. The travel system of a loader of claim 5, wherein said first gear drive assembly comprises:
the first gear driving wheel (12) is in transmission connection with an output shaft of the walking motor (11);
the first gear ring (13) is arranged on the inner wall of the gear box body (18);
one keeps off planet wheel (14), with one keeps off the meshing of action wheel (12), one keeps off planet wheel (14) and sets up on the planet carrier, the planet carrier with intermediate gear (16) fixed connection, one keeps off the clutch and can drive one keeps off planet wheel (14) with one keeps off the meshing of ring gear (13).
7. The running system of a loader as claimed in claim 5 wherein the secondary drive assembly comprises a secondary drive wheel (15), and the secondary clutch is capable of driving the secondary drive wheel (15) to connect with the intermediate gear (16).
8. A travel system for a loader as claimed in claim 1 wherein an oil filter (22) is provided between the oil tank (21) and the supply pump (23), the oil filter (22) communicating at one end with the oil tank (21) and at the other end with the supply pump (23).
9. A loader characterized by comprising thereon a walking system of a loader according to any one of claims 1-8.
10. A method for controlling an operation of a loader according to claim 9, comprising the steps of:
s1, starting the loader, starting the oil supply pump (23), and controlling the first-gear clutch to work by the gear control piece;
s2, starting a walking motor (11), and moving the loader;
s3, when the vehicle speed reaches a first set value, the walking motor (11) adjusts the torque to the first set value, and the gear control piece controls the second gear clutch to work;
s4, shoveling materials by the loader;
s5, when the vehicle speed is reduced to a second set value, the walking motor (11) adjusts the torque to the second set value, and the gear control piece controls the first gear clutch to work;
s6, when the vehicle speed is reduced to a third set value, the walking motor (11) adjusts the current output power of the walking motor (11), so that the current output power is larger than the rated power to work, and the walking motor works for a set time under the current output power;
and S7, stopping shoveling the materials, and transferring the materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110247128.8A CN112878411A (en) | 2021-03-05 | 2021-03-05 | Walking system of loader, loader and operation control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110247128.8A CN112878411A (en) | 2021-03-05 | 2021-03-05 | Walking system of loader, loader and operation control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531079A (en) * | 2021-08-03 | 2021-10-22 | 徐工集团工程机械股份有限公司 | Locking valve, hydraulic torque converter, transmission system of vehicle and vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008008183A (en) * | 2006-06-28 | 2008-01-17 | Hitachi Constr Mach Co Ltd | Construction machine |
| CN102493519A (en) * | 2011-11-22 | 2012-06-13 | 广西柳工机械股份有限公司 | Control system and control method for automatic gear shifting of loader |
| WO2019176888A1 (en) * | 2018-03-15 | 2019-09-19 | 日立建機株式会社 | Work vehicle |
| CN110520576A (en) * | 2017-03-31 | 2019-11-29 | 斗山英维高株式会社 | The control device of engineering machinery and the control method of engineering machinery |
| CN110985629A (en) * | 2019-12-26 | 2020-04-10 | 广西柳工机械股份有限公司 | Hydrostatic drive transmission system, speed change control method and loader |
-
2021
- 2021-03-05 CN CN202110247128.8A patent/CN112878411A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008008183A (en) * | 2006-06-28 | 2008-01-17 | Hitachi Constr Mach Co Ltd | Construction machine |
| CN102493519A (en) * | 2011-11-22 | 2012-06-13 | 广西柳工机械股份有限公司 | Control system and control method for automatic gear shifting of loader |
| CN110520576A (en) * | 2017-03-31 | 2019-11-29 | 斗山英维高株式会社 | The control device of engineering machinery and the control method of engineering machinery |
| WO2019176888A1 (en) * | 2018-03-15 | 2019-09-19 | 日立建機株式会社 | Work vehicle |
| CN110985629A (en) * | 2019-12-26 | 2020-04-10 | 广西柳工机械股份有限公司 | Hydrostatic drive transmission system, speed change control method and loader |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531079A (en) * | 2021-08-03 | 2021-10-22 | 徐工集团工程机械股份有限公司 | Locking valve, hydraulic torque converter, transmission system of vehicle and vehicle |
| CN113531079B (en) * | 2021-08-03 | 2023-03-10 | 徐工集团工程机械股份有限公司 | Locking valve, hydraulic torque converter, transmission system of vehicle and vehicle |
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