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CN-122014703-A - Wheel-track dual-purpose transport vehicle and walking hydraulic system thereof

CN122014703ACN 122014703 ACN122014703 ACN 122014703ACN-122014703-A

Abstract

The application belongs to the field of transport vehicles, and discloses a wheel-track dual-purpose transport vehicle and a traveling hydraulic system thereof, wherein the traveling hydraulic system comprises a hydraulic pump set, and the hydraulic pump set comprises a left pump and a right pump which are mutually independent; the wheel-type travel driving motor comprises a left wheel Bian Ma driven by a left pump and a right wheel motor driven by a right pump, wherein the left wheel Bian Mada and the right wheel motor are respectively arranged at two ends of a front axle and/or two ends of a rear axle of the wheel-track dual-purpose transport vehicle. The wheel-track dual-purpose transport vehicle disclosed by the application can adapt to material transportation under a multi-working condition environment, solves the problem of differential speed among turning wheels of the vehicle, ensures that normal use of the vehicle is not affected by single-side tire slip, also solves the problem that crawler steering cannot be effectively controlled, and also avoids the problem that when the vehicle is switched to wheel type driving, a motor speed reducer swings downwards, so that a pipeline and a motor are insufficient in ground clearance, and the pipeline and the motor are easy to damage, thereby improving the safety and the operation convenience of the vehicle.

Inventors

  • ZHU ZHENGDONG
  • ZHU CHUNCAN
  • FANG ZHE
  • ZENG LI
  • CHENG DEJUN

Assignees

  • 湖南中联重科应急装备有限公司

Dates

Publication Date
20260512
Application Date
20251230

Claims (10)

  1. 1. The walking hydraulic system of the wheel-track dual-purpose transport vehicle is characterized in that the walking hydraulic system (6) comprises: A hydraulic pump group comprising a left pump (61) and a right pump (62) which are independent from each other; A wheeled travel drive motor (66) comprising a left wheel Bian Ma driven by the left pump (61) and a right wheel motor driven by the right pump (62), the left wheel Bian Mada and the right wheel motor being arranged at both ends of a front axle and/or at both ends of a rear axle of the track-and-wheel carrier, respectively.
  2. 2. The walking hydraulic system of a wheel-track dual-purpose transport vehicle according to claim 1, characterized in that the walking hydraulic system (6) comprises: a crawler travel drive motor (65) including a left crawler motor driven by the left pump (61) and a right crawler motor driven by the right pump (62); And the switching valve group is used for switching and controlling the left pump (61) to supply oil to the left wheel Bian Ma or the left crawler motor and the right pump (62) to supply oil to the right wheel motor or the right crawler motor.
  3. 3. The walking hydraulic system of a wheel-track dual-purpose carrier vehicle of claim 2, wherein the switch valve block comprises: The cartridge valve group (63) comprises cartridge valves at least arranged at the oil ports at the two ends of the left wheel Bian Ma, the right wheel side motor, the left crawler motor and the right crawler motor respectively; and the first working oil port of the electromagnetic pilot valve (64) is connected to the control cavity of the cartridge valve at the oil ports at the two ends of the left wheel Bian Ma and the right wheel motor in a guiding way, and the second working oil port is connected to the control cavity of the cartridge valve at the oil ports at the two ends of the left crawler motor and the right crawler motor in a guiding way.
  4. 4. The walking hydraulic system of a wheel and track dual-purpose transport vehicle of claim 3, wherein the switch valve block comprises: the two ends of the first shuttle valve (67) are respectively hydraulically connected to oil ports at the two ends of the left pump (61); The two ends of the second shuttle valve are respectively hydraulically connected to oil ports at the two ends of the right pump (62); and two ends of the third shuttle valve (68) are respectively and hydraulically connected to the oil outlet of the first shuttle valve (67) and the oil outlet of the second shuttle valve, and the oil outlet of the third shuttle valve (68) is hydraulically connected to the oil inlet of the electromagnetic pilot valve (64).
  5. 5. The walking hydraulic system of a wheel-track dual-purpose transport vehicle according to any one of claims 2 to 4, characterized in that the walking hydraulic system (6) comprises: And the electromagnetic switching valve (69) is used for controlling the on-off of the left wheel Bian Ma motor and the right wheel motor between the respective first oil ports and between the respective second oil ports.
  6. 6. The running hydraulic system of a wheel-track dual-purpose transport vehicle according to claim 5, characterized in that the running hydraulic system (6) comprises: The front and rear axle swing hydraulic system comprises a front axle swing oil cylinder (71) and a rear axle swing oil cylinder (72) which are respectively connected to the front axle and the rear axle and are used for driving the crawler to hang in the air; A steering control system includes a steering cylinder (13) for driving the front axle or the rear axle as a steering axle to steer.
  7. 7. The walking hydraulic system of a wheel and track transport vehicle of claim 6, characterized in that the walking hydraulic system (6) comprises a controller configured to: Controlling the front axle swinging oil cylinder (71) and the rear axle swinging oil cylinder (72) to suspend the track in the air in response to a wheel type driving switching signal; Controlling the switching valve group, controlling the left pump (61) to supply oil to the left wheel Bian Ma and controlling the right pump (62) to supply oil to the right wheel motor.
  8. 8. The walking hydraulic system of a wheel and track transport vehicle of claim 7, wherein the controller is configured to: Determining the starting work of the steering oil cylinder (13); determining that the working oil way pressure difference of the left wheel Bian Ma and the right wheel motor reaches a set pressure difference; And controlling the electromagnetic switching valve (69), and conducting a first oil port of the left wheel Bian Ma and a first oil port of the right wheel motor, and conducting a second oil port of the left wheel Bian Ma and a second oil port of the right wheel motor.
  9. 9. The walking hydraulic system of a wheel and track transport vehicle of claim 7, wherein the controller is configured to: Determining that the steering skid condition exists; And controlling the electromagnetic switching valve (69) to cut off a first oil port connected with the left wheel Bian Ma and a first oil port of the right wheel motor, and cut off a second oil port connected with the left wheel Bian Ma and a second oil port of the right wheel motor.
  10. 10. A wheel-track dual-purpose transport vehicle, characterized in that it comprises a travelling hydraulic system (6) of the wheel-track dual-purpose transport vehicle according to any one of claims 1-9.

Description

Wheel-track dual-purpose transport vehicle and walking hydraulic system thereof Technical Field The application belongs to the field of transport vehicles, and particularly relates to a wheel-track dual-purpose transport vehicle and a traveling hydraulic system thereof. Background In the construction of a power grid and a moving tower foundation, construction is often required on various terrains such as mountain lands, paddy fields, marshes, river beaches and the like, and the transportation of construction materials always puzzles construction constructors, and after the construction constructors are required to transport for many times under normal conditions, manual or small-sized machines are scattered and transported to construction points, so that the construction points are rapidly required to be transported on paved roads at high speed, and the construction equipment can be used for walking on paddy fields and marshes with extremely small ground specific pressure and further has high cross-country climbing performance. For this reason, an integrated wheel-track composite technology has been developed for vehicles capable of switching between two running modes of wheels and tracks (i.e., wheel-track dual-purpose vehicles), which combines the speed advantages of wheeled vehicles and the trafficability of tracked vehicles on complex ground, and thus is particularly suitable for field operations where the terrain is complex. However, in the actual working process, the hydraulic pipeline, the motor and the like of the chassis of the wheel-track dual-purpose transport vehicle are easy to wear and damage, the steering operation controllability is poor, and phenomena such as slipping and the like are easy to occur. Disclosure of Invention In order to overcome at least one of the technical defects at present, the application provides a wheel-track dual-purpose transport vehicle and a traveling hydraulic system thereof, which are suitable for material transportation under a multi-working environment and improve the safety and reliability and the operation convenience of vehicle traveling. In order to achieve the above object, the present application provides a traveling hydraulic system of a wheel-track dual-purpose transport vehicle, the traveling hydraulic system comprising: The hydraulic pump unit comprises a left pump and a right pump which are mutually independent; the wheel-type driving motor comprises a left wheel Bian Ma driven by the left pump and a right wheel-side motor driven by the right pump, and the left wheel Bian Mada and the right wheel-side motor are respectively arranged at two ends of a front axle and/or two ends of a rear axle of the wheel-track dual-purpose carrier vehicle. In some embodiments, the walking hydraulic system includes: a track travel drive motor including a left track motor driven by the left pump and a right track motor driven by the right pump; And the switching valve group is used for switching and controlling the left pump to supply oil to the left wheel Bian Ma or the left crawler motor and switching and controlling the right pump to supply oil to the right wheel side motor or the right crawler motor. In some embodiments, the switching valve block includes: The cartridge valve group comprises cartridge valves at least arranged at the oil ports at the two ends of the left wheel Bian Ma, the right wheel motor, the left crawler motor and the right crawler motor respectively; The electromagnetic pilot valve, the first work hydraulic fluid port of electromagnetic pilot valve lead connect to be located left wheel Bian Ma reaches with the control chamber of the cartridge valve of the respective both ends hydraulic fluid port of right wheel limit motor, and the second work hydraulic fluid port lead connect to be located left caterpillar motor with the control chamber of the cartridge valve of the respective both ends hydraulic fluid port of right caterpillar motor. In some embodiments, the switching valve block includes: the two ends of the first shuttle valve are respectively hydraulically connected to oil ports at the two ends of the left pump; The two ends of the second shuttle valve are respectively hydraulically connected to oil ports at the two ends of the right pump; and the two ends of the third shuttle valve are respectively and hydraulically connected to the oil outlet of the first shuttle valve and the oil outlet of the second shuttle valve, and the oil outlet of the third shuttle valve is hydraulically connected to the oil inlet of the electromagnetic pilot valve. In some embodiments, the walking hydraulic system includes: and the electromagnetic switching valve is used for controlling the on-off between the respective first oil ports and the respective second oil ports of the left wheel Bian Ma motor and the right wheel motor. In some embodiments, the walking hydraulic system includes: the front and rear axle swing hydraulic system comprises a front axle swing c