CN111963656A - Engineering machinery electric control automatic gearbox and method - Google Patents
Engineering machinery electric control automatic gearbox and method Download PDFInfo
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- CN111963656A CN111963656A CN202010884577.9A CN202010884577A CN111963656A CN 111963656 A CN111963656 A CN 111963656A CN 202010884577 A CN202010884577 A CN 202010884577A CN 111963656 A CN111963656 A CN 111963656A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—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
- F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Structure Of Transmissions (AREA)
Abstract
The utility model provides an engineering machinery electric control automatic gearbox, which comprises a box body, a torque converter assembly, a parking brake assembly, an oil supply pump assembly, an oil suction pipe assembly, an electric control valve bank assembly, a parking brake assembly, a second gear assembly, a reverse gear and first gear planetary gear train assembly, an isolation frame assembly, an overrunning clutch assembly, a filter oil inlet pipe assembly, a filter oil outlet pipe assembly, a TCU controller assembly and a gearbox control wire harness assembly; the reverse gear and first gear planetary gear train assembly comprises a planetary gear train, a reverse gear friction plate set and a first gear friction plate set which are connected with the planetary gear train, a reverse gear piston connected with the reverse gear friction plate set, and a first gear piston connected with the first gear friction plate set; a plurality of piston return springs are arranged in the circumferential direction of the first gear piston and the reverse gear piston; after the impact is reduced, the service lives of the overrunning clutch and each transmission gear are prolonged, the service life of the gearbox assembly is prolonged, the gear shifting impact is reduced, and the comfort of a driver is improved.
Description
Technical Field
The disclosure relates to an engineering machinery electric control automatic gearbox and a method.
Background
The transmission is divided into a planetary type transmission and a fixed shaft type transmission according to the structural types, the planetary transmission mainly adopts a mechanical control valve to shift gears, and a control valve is operated through a pull wire to realize the gear shifting, so that the market generally reflects the problems of large gear shifting impact, equal gear, oil leakage of a piston, poor operability, low service life, high failure rate and the like; the operating condition of the loader requires frequent forward and backward gear shifting, so that the operating strength of a driver is high; due to structural limitation, the electric control proportional valve cannot be used for controlling, so that the electric control automatic gear shifting cannot be realized; the fixed shaft type gearbox can carry out electric control automatic gear shifting, but has the defects of complex structure, more parts, need of realizing automatic gear shifting through a plurality of groups of wet clutches, high control difficulty, low efficiency, high cost, low cost performance, inconvenient maintenance and the like;
the existing technical problems are as follows: 1. the current gear shifting impact is large, and the reliability of parts is low; 2. the working intensity of drivers is high at present; 3. the problem of gear waiting is easily caused due to the leakage of the clutch piston; 4. the opening pressure of the clutch is low, and automatic control cannot be realized at present; 5. at present, the precision of the filter is low, and the cleanliness requirement of the electro-hydraulic proportional valve is difficult to ensure.
Disclosure of Invention
In order to solve the technical problem, the present disclosure provides an engineering machinery electronic control automatic transmission and a method.
In a first aspect, the present disclosure provides an engineering machinery electric control automatic gearbox, which comprises a box body, an overrunning clutch connected with the box body, a reverse gear and first gear planetary gear train assembly connected with the overrunning clutch assembly; the reverse gear and first gear planetary gear train assembly comprises a planetary gear train, a reverse gear friction plate set and a first gear friction plate set which are connected with the planetary gear train, a reverse gear piston connected with the reverse gear friction plate set, and a first gear piston connected with the first gear friction plate set; a plurality of piston return springs are arranged in the circumferential direction of the first gear piston and the reverse gear piston.
In a second aspect, the present disclosure also provides a method for using the electrically controlled automatic transmission of the construction machine according to the first aspect, including:
when the clutch is in a light load working condition, if the first gear clutch is combined, the planetary gear train drives the transmission gear to output through the output shaft assembly, the first gear piston acts and can return through the return piston spring to output for the first gear; if the reverse gear clutch is combined, the planetary gear train drives the transmission gear, the output is carried out through the output shaft assembly, the reverse gear piston acts, and the reverse gear clutch can return through the return piston spring to output the reverse gear
When the hydraulic torque converter is in a heavy-load working condition, the pump wheel input of the hydraulic torque converter drives the first-stage turbine of the hydraulic torque converter and the second-stage turbine of the hydraulic torque converter, the hydraulic torque converter is transmitted to the planetary gear train through the overrunning clutch, and the transmission line of each gear is the same as the idle load.
Compared with the prior art, this disclosure possesses following beneficial effect:
1. the reverse gear and first gear planetary gear train assembly is connected by adopting an overrunning clutch assembly; the reverse gear and first gear planetary gear train assembly comprises a planetary gear train, a reverse gear friction plate set and a first gear friction plate set which are connected with the planetary gear train, a reverse gear piston connected with the reverse gear friction plate set, and a first gear piston connected with the first gear friction plate set; a plurality of piston return springs are arranged in the circumferential direction of the first gear piston and the reverse gear piston; the first-gear piston is sealed by a Glare ring seal or a D-shaped seal ring, so that the problems that the current gear shifting impact is large, the reliability of parts is low, and the like caused by the leakage of a clutch piston are solved, the service lives of an overrunning clutch and each transmission gear are prolonged after the impact is reduced, and the service life of a gearbox assembly is prolonged.
2. The TCU controller assembly is connected with an instrument display, a power supply, a torque converter working oil temperature sensor, an oil pan temperature sensor, an FNR gear selection button, a transmission gear shifting execution proportional valve, a transmitter/pump wheel rotating speed sensor, a turbine rotating speed sensor and a transmission output shaft rotating speed sensor through a gearbox control wire harness assembly and is matched with a reverse gear and a first gear planetary gear train assembly, the problem that the starting pressure of a clutch is low and automatic control cannot be achieved at present is solved, automatic gear shifting is achieved, neutral gear N-forward F1-forward F2-forward F1-neutral gear N-reverse gear R is achieved, electromagnetic valves are controlled through the TCU, gear shifting impact is reduced, and comfort of a driver is improved.
4. This openly adopts increase precision filter before the automatically controlled valves assembly oil inlet, through business turn over pipe connection, guarantees the cleanliness requirement of the fluid of automatically controlled valve, and it is low to have solved present filter precision, is difficult to guarantee the cleanliness requirement problem of electric liquid proportional valve, guarantees the cleanliness requirement of the fluid of automatically controlled valve, effectively reduces navigating mate's working strength, and is with low costs, the sexual valence relative altitude.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a block diagram of a transmission assembly;
FIG. 2 is a cross-sectional view of a transmission assembly construction;
FIG. 3 is a K-direction view of the gearbox assembly structure of FIG. 1;
FIG. 4 is a sectional view B-B of the gearbox assembly of FIG. 1;
FIG. 5 is an electrical schematic diagram of the transmission assembly of the present disclosure;
FIG. 6 is a transmission schematic of the transmission assembly of the present disclosure;
FIG. 7 is a structural view of a reverse piston and a first gear piston of the present disclosure;
FIG. 8 is a diagram of a spring arrangement of the present disclosure;
FIG. 9 is a first piston seal configuration of the present disclosure;
FIG. 10 is a second piston seal configuration of the present disclosure;
in the figure: 1. a torque converter assembly; 2. a working pump output gear shaft; 3. an O-shaped sealing ring; 4. a short hexagon head bolt; 5. a long hexagon head bolt; 6. a spring washer; 7. a gasket; 8. a box body; 9. a gasket; 10. a hexagon head bolt; 11. a hexagon head bolt; 12. an oil supply pump assembly; 13. an oil suction pipe assembly; 14. a straight-through joint; 15. an O-shaped sealing ring; 16. an electric control valve group assembly; 17. a gasket; 18. a hexagon head bolt; 19. an oil suction flange; 20. a hexagon head bolt; 21. a spring washer; 22. a turbine speed sensor; 23. a hexagon socket head screw; 24. a parking brake assembly; 25. a hexagon head bolt; 26. a gasket; 27. an end cap; 28. a hexagon head bolt; 29. a second gear assembly; 30. an output rotation speed sensor; 31. a reverse gear and first gear planetary gear train assembly; 32. a hexagon head bolt; 33. a spring washer; 34. a first gear piston; 35. a friction blocking sheet set; 36. an isolation frame assembly; 37. a piston return spring; 38. a secondary turbine output gear shaft; 39. a first turbine output gear shaft; 40. a reverse gear piston; 41. a reverse gear friction plate set; 42. an overrunning clutch assembly; 43. an oil blocking cylinder body; 44. an output shaft assembly; 45. a steering pump output gear shaft; 46. a temperature sensor; 47. a filter assembly; 48. an oil inlet pipe assembly of the filter; 49. a filter outlet line assembly; 50. a TCU controller assembly; 51. a transmission control harness assembly; 52. FNR gear selecting handle; 101. a torque converter impeller; 102. a hydraulic torque converter first-stage turbine; 103. a hydraulic torque converter secondary turbine; 104. an oil supply pump assembly; 105. a working pump input shaft; 106. a first stage turbine output shaft; 107. a secondary turbine output shaft; 108. an overrunning clutch; 109. a steering pump input shaft; 110. a planetary gear train; 110-1, reverse gear planet wheels; 110-2, a first gear planet wheel; 111. a reverse clutch; 112. a first gear clutch; 113. a second clutch; 114. a transfer gear; 115. an output shaft assembly; 116. a parking brake assembly.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1, an electric control automatic transmission for engineering machinery comprises a box body, a torque converter assembly, a parking brake assembly, an oil supply pump assembly, an oil suction pipe assembly, an electric control valve bank assembly, a parking brake assembly, a second gear assembly, a reverse gear and first gear planetary gear train assembly, an isolation frame assembly, an overrunning clutch assembly, a filter oil inlet pipe assembly, a filter oil outlet pipe assembly, a TCU controller assembly and a transmission control harness assembly;
the torque converter assembly is arranged at the top of the box body, one end of the torque converter assembly is connected with one end of the oil supply pump assembly through an output gear shaft of the oil supply pump, the other end of the oil supply pump assembly is connected with the oil suction pipe assembly, the electromagnetic valve group assembly is installed on one side of the box body through a hexagon bolt, a precision filter is additionally arranged in front of an oil inlet of the electric control valve group assembly and is connected through an inlet and outlet pipeline, and the cleanliness requirement of oil liquid of the electric control valve is guaranteed; the parking brake assembly is arranged at the bottom of the box body and is connected with an end cover of the box body through a bolt; the second gear assembly is arranged on the inner side of the end cover, the second gear assembly is connected with the overrunning clutch assembly, the overrunning clutch assembly is further connected with the reverse gear and the first gear planetary gear train assembly, and the isolation frame assembly is arranged between the first gear piston and the reverse gear piston; the filter oil inlet pipe assembly and the filter oil outlet pipe assembly are connected with the filter component; the TCU controller assembly is connected with an instrument display, a power supply, a torque converter working oil temperature sensor, an oil pan temperature sensor, an FNR gear selection button, a transmission gear shifting execution proportional valve, a transmitter/pump wheel rotating speed sensor, a turbine rotating speed sensor and a transmission output shaft rotating speed sensor through a transmission case control wire harness assembly.
Further, the torque converter assembly is connected with the box body through a short hexagon head bolt, a long hexagon head bolt, an O-shaped sealing ring and a spring washer, and the oil supply pump assembly is connected with the box body through a sealing gasket and a hexagon bolt; the oil suction pipe assembly is connected with the straight-through joint through an O-shaped sealing ring; the torque converter assembly comprises a hydraulic torque converter pump impeller, a secondary turbine output gear shaft and a primary turbine output gear shaft for output; the output is carried out through a pump wheel input of a hydraulic torque converter, a second-stage turbine output gear shaft and a first-stage turbine output gear shaft; the torque converter assembly is connected with the overrunning clutch through a second-stage turbine output gear shaft or a first-stage turbine output gear shaft.
Furthermore, the electromagnetic valve assembly is connected with the box body through a sealing gasket, a hexagon head bolt and a spring washer; the bottom of the box body is connected with an oil pipe through an oil suction flange, a hexagon head bolt and a spring washer; a turbine speed sensor is mounted on the box body through an inner hexagon head screw and connected with the TCU controller assembly; one side of the torque converter assembly is provided with a temperature sensor, and the temperature sensor comprises a torque converter working oil temperature sensor and an oil pan temperature sensor; the parking brake assembly is connected with one end of the end cover through a hexagon head bolt and a sealing ring, the other end of the end cover is connected with the box body through the hexagon head bolt, a spring washer and a short hexagon head bolt, an output rotating speed sensor connected with the box body is further arranged at a set distance from the end cover, and one end of the output rotating speed sensor is connected with a gear of the secondary assembly;
the reverse gear and first gear planetary gear train assembly is connected with the box body through a hexagon head bolt and a spring coil and comprises a planetary gear train, a reverse gear friction plate set and a first gear friction plate set which are connected with the planetary gear train, a reverse gear piston connected with the reverse gear friction plate set and a first gear piston connected with the first gear friction plate set; a plurality of piston return springs are arranged in the circumferential direction of the first gear piston and the reverse gear piston. Specifically, the reverse gear and first gear planetary gear train assembly comprises a first gear oil cylinder, a first gear piston, a first gear friction plate set, an isolation frame assembly, a reverse gear friction plate, a reverse gear piston and a reverse gear oil cylinder which are sequentially connected; one end of a gear piston is connected with a gear oil cylinder, the other end of the gear piston is connected with a gear friction plate set, one end of the gear friction plate set is connected with an isolation frame assembly, the other end of the isolation frame assembly is connected with one end of a reverse gear friction plate set, the other end of the reverse gear friction plate set is connected with one end of a reverse gear piston, and the other end of the reverse gear piston is connected with the reverse gear oil cylinder.
Further, a piston return spring is installed on the first gear piston, the first gear piston return spring is made of a VDCrSi spring steel wire with high strength and high fatigue grade, the wire diameter of the spring is phi 3.2-phi 4, the first gear piston is sealed by a Glare ring, and a D-shaped sealing ring is selected as an alternative scheme.
Furthermore, the reverse gear and first gear planetary gear train assembly is also provided with a planetary gear train connected with a first gear piston and a second gear piston, and when the first gear clutch is combined, the planetary gear train drives the transmission gear to output through the output shaft assembly, so that the first gear output is realized; when the reverse gear clutch is combined, the planetary gear train drives the transmission gear, and the transmission gear is output through the output shaft assembly and is used for reverse gear output; the right end of the first gear piston moves left after pressure oil is fed through the oil duct to press the friction plate tightly, and the first gear piston resets under the action of the piston return spring after oil is discharged from the right end of the first gear piston; similarly, the left end of the reverse gear piston moves to the right after pressure oil is fed through the oil duct, and after oil is discharged from the left end of the reverse gear piston, the reverse gear piston is reset under the action of the piston return spring; the inner diameter and the outer diameter of the reverse gear piston are consistent with those of the first gear piston, so that the assembly of a sealing element is facilitated; the first gear oil cylinder is of an integral structure, and the reverse gear oil cylinder is of an integral structure.
The inner diameter size of the first gear piston is the same as that of the reverse gear piston, the inner diameter is phi 245 to phi 252, the sealing consistency is guaranteed, oil pressure control is facilitated, 10-20 return piston springs are uniformly distributed on the circumferences of the outer rings of the first gear piston and the reverse gear piston, the area of the piston is reduced, the pressure of the return piston springs can meet the requirement of the minimum opening pressure required by the electro-hydraulic proportional valve, and automatic control is achieved.
Further, a turbine speed sensor is added on the hydraulic torque conversion box body; an output rotating speed sensor is added in a gearbox body to detect an output gear of a secondary assembly;
further, a forward gear electromagnetic valve Y1, a forward gear electromagnetic valve Y2 and a reverse gear electromagnetic valve Y3 are integrated on the electric control valve bank assembly;
a transmission route is as follows:
the input through the torque converter impeller 101 directly transfers power to the supply pump assembly 104, the working pump input shaft 4 and the steering pump input shaft 109.
Under the light-load working condition, the input of the pump impeller 101 of the hydraulic torque converter drives the first-stage turbine 102 of the hydraulic torque converter, the input of the pump impeller 101 of the hydraulic torque converter is transmitted to the planetary gear train 110 through the overrunning clutch 108, when the electromagnetic valve Y1 is combined through TCU control, the first-gear planet carrier 110-1 is combined with the first-gear clutch, and the planetary gear train 110 drives the transmission gear 114 and outputs the output through the output shaft assembly 115 to form first-gear output. When the solenoid valve Y3 is engaged by TCU control, the second clutch 113 is engaged, and drives the output shaft assembly 115 through the transfer gear 114 to output at second gear. When the electromagnetic valve Y2 is combined through TCU control, the reverse gear planet carrier 110-2 is combined with the reverse gear clutch 111, the planetary gear train 110 drives the transmission gear 114, and output is performed through the output shaft assembly 115 and is output in reverse gear;
under the heavy load working condition, the input of a pump impeller 101 of the hydraulic torque converter drives a first-stage turbine 102 and a second-stage turbine 103 of the hydraulic torque converter, and the input is transmitted to a planetary gear train 110 through an overrunning clutch 108, and the transmission line of each gear is the same as that of the idle load.
The gears are all shifted by controlling each gear through the TCU, the control is judged through an engine rotating speed sensor, a turbine rotating speed sensor and a transmission output shaft rotating speed sensor, so that the first gear is increased to the second gear, and the FNR gear selecting handle 52 is used for switching forward F, neutral N and reverse R.
Example 2
A use method of an electric control automatic gearbox of engineering machinery comprises the following steps:
when the electromagnetic valve Y1 is combined through TCU control, the first gear clutch is combined, the planetary gear train drives the transmission gear, the output is carried out through the output shaft assembly, the first gear piston acts, and the first gear piston can return through the return piston spring and is output for the first gear; when the electromagnetic valve Y3 is combined through TCU control, the two-gear clutch is combined, and the output shaft assembly is driven by the transmission gear to output, namely two-gear output; when the electromagnetic valve Y2 is combined through TCU control, the reverse gear clutch is combined, the planetary gear train drives the transmission gear, the output is carried out through the output shaft assembly, the reverse gear piston acts, and the reverse gear piston can return through the return piston spring and is output for reverse gear;
when the hydraulic torque converter is in a heavy-load working condition, the pump wheel input of the hydraulic torque converter drives the first-stage turbine of the hydraulic torque converter and the second-stage turbine of the hydraulic torque converter, the hydraulic torque converter is transmitted to the planetary gear train through the overrunning clutch, and the transmission line of each gear is the same as the idle load.
The gears are all shifted by controlling each gear through the TCU, the control is judged through an engine rotating speed sensor, a turbine rotating speed sensor and a transmission output shaft rotating speed sensor, so that the first gear is increased to the second gear, and the FNR gear selecting handle 52 is used for switching forward F, neutral N and reverse R.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. An electric control automatic gearbox of engineering machinery is characterized by comprising a box body, an overrunning clutch connected with the box body, a reverse gear and first gear planetary gear train assembly connected with the overrunning clutch assembly; the reverse gear and first gear planetary gear train assembly comprises a planetary gear train, a reverse gear friction plate set and a first gear friction plate set which are connected with the planetary gear train, a reverse gear piston connected with the reverse gear friction plate set, and a first gear piston connected with the first gear friction plate set; a plurality of piston return springs are arranged in the circumferential direction of the first gear piston and the reverse gear piston.
2. The electrically controlled automatic transmission of engineering machinery according to claim 1, wherein the reverse gear and first gear planetary gear train assembly comprises a first gear cylinder, a first gear piston, a first gear friction plate set, an isolation frame assembly, a reverse gear friction plate, a reverse gear piston and a reverse gear cylinder which are connected in sequence; one end of a gear piston is connected with a gear oil cylinder, the other end of the gear piston is connected with a gear friction plate set, one end of the gear friction plate set is connected with an isolation frame assembly, the other end of the isolation frame assembly is connected with one end of a reverse gear friction plate set, the other end of the reverse gear friction plate set is connected with one end of a reverse gear piston, and the other end of the reverse gear piston is connected with the reverse gear oil cylinder.
3. The electrically controlled automatic transmission for construction machinery according to claim 2, wherein the reverse gear piston and the first gear piston have the same inner and outer diameter dimensions.
4. The electrically controlled automatic transmission for construction machinery according to claim 2, wherein the one-gear cylinder is of a one-piece structure.
5. The electrically controlled automatic transmission for construction machinery according to claim 2, wherein the first-gear piston seal is a gray ring seal or a D-ring seal.
6. The electrically controlled automatic transmission for engineering machinery according to claim 1, wherein the piston return spring is a VDCrSi spring steel wire, and the diameter of the spring wire is Φ 3.2- Φ 4.
7. The electrically controlled automatic transmission for construction machinery according to claim 1, further comprising a TCU controller assembly connected to the casing, wherein the TCU controller assembly is connected to the meter display, the power source, the torque converter operating oil temperature sensor, the oil pan temperature sensor, the FNR shift selection button, the transmission shift execution proportional valve, the transmitter/pump wheel speed sensor, the turbine speed sensor and the transmission output shaft speed sensor through a transmission control harness assembly.
8. The electrically controlled automatic transmission for construction machinery according to claim 1, further comprising a torque converter assembly, a parking brake assembly, an oil supply pump assembly and an oil suction pipe assembly connected to the case; the torque converter assembly is arranged at the top of the box body, one end of the torque converter assembly is connected with one end of the oil supply pump assembly through an output gear shaft of the oil supply pump, and the other end of the oil supply pump assembly is connected with the oil suction pipe assembly.
9. An electric control automatic gearbox of engineering machinery as claimed in claim 1, further comprising an electric control valve assembly connected with the box body, wherein the electromagnetic valve assembly is installed on one side of the box body through a hexagon head bolt, and a precision filter is added in front of an oil inlet of the electric control valve assembly and is connected through an inlet and outlet pipeline.
10. A method for using an electrically controlled automatic transmission for a construction machine according to any one of claims 1 to 9, comprising:
when the clutch is in a light load working condition, if the first gear clutch is combined, the planetary gear train drives the transmission gear to output through the output shaft assembly, the first gear piston acts and can return through the return piston spring to output for the first gear; if the reverse gear clutch is combined, the planetary gear train drives the transmission gear, the output is carried out through the output shaft assembly, the reverse gear piston acts, and the reverse gear can be returned through the return piston spring and output for reverse gear;
when the hydraulic torque converter is in a heavy-load working condition, the pump wheel input of the hydraulic torque converter drives the first-stage turbine of the hydraulic torque converter and the second-stage turbine of the hydraulic torque converter, the hydraulic torque converter is transmitted to the planetary gear train through the overrunning clutch, and the transmission line of each gear is the same as the idle load.
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| CN202010884577.9A CN111963656A (en) | 2020-08-28 | 2020-08-28 | Engineering machinery electric control automatic gearbox and method |
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|---|---|---|---|---|
| CN113565900A (en) * | 2021-07-26 | 2021-10-29 | 贵州凯星液力传动机械有限公司 | Combined hydraulic retarder |
| CN114809175A (en) * | 2022-04-19 | 2022-07-29 | 无锡明恒混合动力技术有限公司 | Pure electric drive system for skid steer loader |
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