A forestry range-extended tracked multi-functional vehicle

Abstract

This invention discloses a range-extended tracked multi-functional vehicle for forestry, belonging to the technical field of forestry automation equipment. It solves the problem that wheeled and tracked forestry power vehicles each have their advantages and disadvantages, making them difficult to adapt to complex forest terrain. The multi-functional vehicle adopts a modular design, allowing different types of vehicle bodies to be selected and assembled onto a three-degree-of-freedom connection device connected to the vehicle head according to usage requirements. Agricultural implements are detachably mounted on the drive end of the mechanical support. By assembling different types of agricultural implements, different types of work can be performed. The vehicle head is equipped with multiple hydraulic and electrical interfaces, enabling detachable assembly with multiple motors and hydraulic cylinders. The tracked wheel walking structure, after connecting to its internal walking drive motor, achieves the walking function. During assembly, the tracked wheel walking structure uses tire inflation for automatic tensioning, preventing track slippage. It combines the advantages of tracks and wheels; the tracks protect the tires, increase the force-bearing area, improve traction, and enhance stability.

Description

Technical Field

[0001] This invention relates to the technical field of forestry automation equipment, and in particular to a range-extended tracked multi-functional vehicle for forestry. Background Technology

[0002] my country has a vast forest coverage area with complex and varied terrain, and roads that are rugged, muddy, and prone to getting stuck in the mud. Tracked vehicles, if not maintained in time or interacting with tree roots and other debris, are prone to being dragged. Therefore, higher requirements are placed on the stability and safety of range-extended tracked multi-functional vehicles for forestry, as ordinary forestry motor vehicles are difficult to adapt to the complex terrain of forest areas.

[0003] With the continuous depletion of petroleum energy and the introduction of increasingly stringent emission regulations, new energy vehicles, as a mode of transportation with low emissions and low pollution, have received widespread attention from vehicle manufacturers. Developing new energy vehicles has become an urgent task for the automotive industry. Pure electric vehicles rely entirely on drive motors to propel the vehicle, drawing energy from the power grid, achieving zero fuel consumption and zero emissions. However, currently, due to limitations in the level of power batteries, the overall driving range is limited and cannot meet the daily needs of users. Applying this technology to forestry power vehicles would be insufficient to meet their operational requirements. Summary of the Invention

[0004] To address the problem that wheeled and tracked forestry vehicles each have their advantages and disadvantages, making them difficult to adapt to complex forest terrain, the present invention aims to provide a range-extended tracked multi-functional forestry vehicle. This invention designs a range-extended tracked multi-functional vehicle specifically for complex forest terrain, possessing excellent climbing and obstacle-crossing capabilities to meet the usage requirements under complex forest conditions. Furthermore, to extend the driving range of a pure electric vehicle, a range extender is added to the multi-functional vehicle's power system. When the battery power is insufficient, the range extender generates electricity to provide energy to the entire vehicle, thereby increasing the driving range.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A range-extended tracked multi-functional vehicle for forestry, comprising:

[0007] The front end, the body, and the three-degree-of-freedom connection device 2 are connected together;

[0008] Tracked wheel running structure 7: A tracked wheel running structure 7 is rotatably installed on the left and right sides of the front of the vehicle; A tracked wheel running structure 7 is rotatably installed on the left and right sides of the vehicle body.

[0009] The vehicle includes a range extender 91, a battery pack 92, and a drive motor 93. The drive motor 93 is installed in both the front and the body of the vehicle. Each drive motor 93 drives a tracked wheel walking structure 7. Multiple drive motors 93 are connected to the battery pack 92 via wiring. The battery pack 92 and the range extender 91 are also connected via wiring.

[0010] Each tracked wheel travel structure 7 includes: a wheel frame, wheels and tracks. The inner side of the wheel frame is provided with a long shaft, which is rotatably installed in the front or body of the vehicle. Two wheels are installed on the outer side of the wheel frame. The tracks cover the outer periphery of the two wheels and are in a tensioned state. Each travel drive motor 93 drives the two wheels to rotate synchronously.

[0011] The aforementioned forestry range-extended tracked multi-functional vehicle, wherein each tracked wheel walking structure 7 further includes: a chain drive mechanism, the chain drive mechanism being installed inside the wheel frame, the chain drive mechanism including: a driving sprocket, a driven sprocket and a drive chain, a driven sprocket being installed on the axle of each of the two wheels, the driving sprocket being installed inside the wheel frame and positioned between the two driven sprockets, the driving sprocket and the two driven sprockets being connected by a drive chain, and the walking drive motor 93 driving the driving sprocket to rotate, thereby driving the two wheels to rotate synchronously.

[0012] The aforementioned forest range-extended tracked multi-functional vehicle includes a front end comprising a front frame 1 and a front shell 4. The front shell 4 is mounted above the front frame 1, and the range extender 91 and battery pack 92 are both mounted on the front frame 1 and located inside the front shell 4.

[0013] The two drive motors 93 located inside the front of the vehicle are both mounted on the front frame 1 and located inside the front housing 4.

[0014] The aforementioned forestry range-extended tracked multi-functional vehicle also includes a hydraulic drive unit, which is mounted on the front frame 1 and located inside the front shell 4.

[0015] The aforementioned forestry range-extended tracked multi-functional vehicle includes a three-degree-of-freedom connecting device 2 comprising: a front connecting frame 21, a middle connecting frame 22, a rear connecting frame 23, a swing hydraulic cylinder 24, and a torsion motor 25. The front connecting frame 21 is connected to the rear end of the vehicle head frame 1, the rear connecting frame 23 is connected to the front end of the vehicle body, and the torsion motor 25 is mounted at the rear end of the middle connecting frame 22. The output shaft of the torsion motor 25 is horizontally arranged along the front-rear direction and extends from the front end of the middle connecting frame 22. The front end of the middle connecting frame 22 and the rear end of the front connecting frame 21 are rotatably connected by a vertically set rotating shaft. The main body of the torsion motor 25 and the rear connecting frame 23 are rotatably connected by rotating shafts arranged horizontally in the left and right directions. Two swing hydraulic cylinders 24 are symmetrically arranged on the left and right sides of the middle connecting frame 22. The cylinder body of each swing hydraulic cylinder 24 is rotatably connected to the middle connecting frame 22, and the end of the cylinder rod of each swing hydraulic cylinder 24 is rotatably connected to the front connecting frame 21. Both swing hydraulic cylinders 24 are connected to the hydraulic drive device through hydraulic pipelines.

[0016] The aforementioned forestry range-extended tracked multi-functional vehicle further includes: a mechanical support 5 and agricultural implements 6. The mechanical support 5 includes: a rotating base 51, a base bracket 52, support arms 53, and adjusting hydraulic cylinders 54. The base bracket 52 is installed at the rear end of the vehicle head frame 1 and above the three-degree-of-freedom connection device 2. The rotating base 51 is rotatably mounted on the base bracket 52. Multiple support arms 53 are rotatably connected in sequence. The end of the lowest support arm 53 is connected to the rotating base 51, and the end of the highest support arm 53 is rotatably connected to the agricultural implements 6. Any two adjacent support arms 53 are rotatably connected to the two ends of an adjusting hydraulic cylinder 54, and the angle between the two support arms 53 is adjusted by the adjusting hydraulic cylinder 54. The highest support arm 53 and the agricultural implements 6 are rotatably connected to the two ends of an adjusting hydraulic cylinder 54, and the working angle of the agricultural implements 6 is adjusted by the adjusting hydraulic cylinder 54. Multiple adjusting hydraulic cylinders 54 are all connected to the hydraulic drive device through hydraulic pipelines.

[0017] The mechanical support 5 also includes a rotation drive motor, which is mounted on the base support 52 and is used to drive the rotating base 51 to rotate. The rotation drive motor is connected to the battery pack 92 via a circuit.

[0018] The aforementioned forestry range-extended tracked multi-functional vehicle includes a mechanical support 5 that further comprises: a telescopic rod 56, a telescopic hydraulic cylinder 57, and a support foot 58. Two hollow tubes are symmetrically arranged on the left and right sides of the base support 52, both of which are inclined downwards. Each telescopic rod 56 is slidably installed inside a hollow tube, and the lower end of each telescopic rod 56 is rotatably connected to a support foot 58. One end of each telescopic hydraulic cylinder 57 is connected to a hollow tube, and the other end of the telescopic hydraulic cylinder 57 is connected to the telescopic rod 56 located inside the hollow tube. Both telescopic hydraulic cylinders 57 are connected to a hydraulic drive device via hydraulic pipelines.

[0019] The aforementioned forest range-extended tracked multi-purpose vehicle includes a body frame 3, which is detachably connected to a rear connecting frame 23. Two drive motors 93 located inside the vehicle are mounted on the body frame 3.

[0020] The aforementioned range-extended tracked multi-functional vehicle for forestry uses either a fire engine body or a transport vehicle body.

[0021] The fire truck body also includes: a water tank 81 and a fire hydrant 82, wherein the water tank 81 is installed above the vehicle frame 3, and the fire hydrant 82 is rotatably installed above the water tank 81;

[0022] The transport vehicle also includes: pillars 84, with multiple pillars 84 symmetrically arranged on the left and right sides of the vehicle frame 3 and all connected to the upper surface of the vehicle frame 3;

[0023] The vehicle body also includes an electric winch 83, which is mounted at the rear end of the vehicle frame 3.

[0024] The aforementioned forestry range-extended tracked multi-functional vehicle includes agricultural implements 6, such as hook bucket 61, vibratory hammer 62, grass cutter head 63, vibratory harvesting head 64, circular saw 65, land clearing head 66, grab saw 67, or pit drill head 68.

[0025] The present invention, by employing the above-mentioned technology, has the following positive effects compared with the prior art:

[0026] (1) In this invention, the multi-functional vehicle adopts a modular design. Different types of vehicle bodies can be selected and assembled on the three-degree-of-freedom connection device connected to the vehicle head according to the usage requirements, so as to realize the modular design of the vehicle head and the vehicle body. Agricultural machinery implements can be detachably assembled on the drive end of the mechanical support. By assembling different types of agricultural machinery implements, different types of work can be performed. The vehicle head is equipped with multiple hydraulic interfaces and circuit interfaces, which can realize the detachable assembly with multiple motors and hydraulic cylinders. The rear end of the vehicle body can be detachably assembled with a variety of implements including electric winches. Multiple tracked wheel walking structures also form a complete structure independently and can be detachably assembled in the vehicle head or vehicle body. Each walking drive motor is connected to a tracked wheel walking structure to realize the drive. After connecting with the walking drive motor inside it, the walking function can be realized.

[0027] (2) In this invention, the multi-functional vehicle is an electric vehicle powered by a battery pack. By equipping the front of the vehicle with a range extender to charge the battery pack, the range extender can generate electricity when the battery pack has a low charge. The battery pack provides power to the vehicle, ensuring normal operation and avoiding the inability to work due to low charge. This improves the range and reduces environmental pollution.

[0028] (3) In the present invention, in the tracked wheel walking structure, two wheels are installed on the outside of the wheel frame. The track covers the outer periphery of the two wheels and is in a tensioned state. During assembly, the tires are automatically inflated and tightened, making it difficult to slip off. It combines the advantages of track and wheel. The track protects the tires, increases the force-bearing area, improves grip, and increases stability. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of a forestry range-extended tracked multi-functional vehicle according to the present invention.

[0030] Figure 2 This is a side view of a forestry range-extended tracked multi-functional vehicle according to the present invention.

[0031] Figure 3 This is a front view of a forestry range-extended tracked multi-functional vehicle according to the present invention.

[0032] Figure 4 This is a schematic diagram of the structure of a forestry range-extended tracked multi-functional vehicle without the front shell assembly, according to the present invention.

[0033] Figure 5 This is a schematic diagram of the structure of a forestry range-extended tracked multi-functional vehicle without its body assembled, according to the present invention.

[0034] Figure 6 This is a schematic diagram of the mechanical support structure of a forestry range-extended tracked multi-functional vehicle according to the present invention.

[0035] Figure 7 This is a schematic diagram of the three-degree-of-freedom connection device of a forestry range-extended tracked multi-functional vehicle according to the present invention.

[0036] Figure 8 This is a top view of a three-degree-of-freedom connection device for a forestry range-extended tracked multi-functional vehicle according to the present invention.

[0037] Figure 9 This is a schematic diagram of the fire engine body of a forest range-extended tracked multi-functional vehicle according to the present invention.

[0038] Figure 10 This is a schematic diagram of the transport body of a forestry range-extended tracked multi-functional vehicle according to the present invention.

[0039] Figure 11 and Figure 12 This is an example diagram of some agricultural machinery implements that can be mounted on a mechanical support.

[0040] In the attached diagram: 1. Headframe; 2. Three-degree-of-freedom connection device; 3. Bodyframe; 4. Headshell; 5. Mechanical support; 6. Agricultural implements; 7. Tracked wheel walking structure; 21. Front connecting frame; 22. Middle connecting frame; 23. Rear connecting frame; 24. Swing hydraulic cylinder; 25. Torsion motor; 51. Rotating base; 52. Base bracket; 53. Support arm; 54. Adjusting hydraulic cylinder; 56. Telescopic rod; 57. Telescopic hydraulic cylinder; 58. Support foot; 61. Hook bucket; 62. Vibratory hammer; 63. Mowing head; 64. Vibrating harvesting head; 65. Circular saw; 66. Clearing head; 67. Grab saw; 68. Pit drill head; 81. Water tank; 82. Fire hydrant; 83. Electric winch; 84. Column; 91. Range extender; 92. Battery pack; 93. Walking drive motor. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0042] Please refer to Figures 1 to 12 As shown, a forestry range-extended tracked wheeled multi-purpose vehicle is illustrated, which includes:

[0043] The front end, the body, and the three-degree-of-freedom connection device 2 are connected together;

[0044] Tracked wheel running structure 7: A tracked wheel running structure 7 is rotatably installed on the left and right sides of the front of the vehicle; A tracked wheel running structure 7 is rotatably installed on the left and right sides of the vehicle body.

[0045] The vehicle includes a range extender 91, a battery pack 92, and a drive motor 93. The drive motor 93 is installed in both the front and the body of the vehicle. Each drive motor 93 drives a tracked wheel walking structure 7. Multiple drive motors 93 are connected to the battery pack 92 via wiring. The battery pack 92 and the range extender 91 are also connected via wiring.

[0046] Each tracked wheel travel structure 7 includes: a wheel frame, wheels and tracks. The inner side of the wheel frame is provided with a long shaft, which is rotatably installed in the front or body of the vehicle. Two wheels are installed on the outer side of the wheel frame. The tracks cover the outer periphery of the two wheels and are in a tensioned state. Each travel drive motor 93 drives the two wheels to rotate synchronously.

[0047] Furthermore, in a preferred embodiment, each tracked wheel traveling structure 7 further includes a chain drive mechanism, which is installed inside the wheel frame. The chain drive mechanism includes a driving sprocket, a driven sprocket, and a drive chain. Driven sprockets are installed on the axles of both wheels. The driving sprocket is installed inside the wheel frame and located between the two driven sprockets. The driving sprocket and the two driven sprockets are connected by a drive chain. The traveling drive motor 93 drives the driving sprocket to rotate, thereby driving the two wheels to rotate synchronously.

[0048] Furthermore, in a preferred embodiment, the front of the vehicle includes: a front frame 1 and a front housing 4, the front housing 4 being mounted above the front frame 1, and the range extender 91 and the battery pack 92 being mounted on the front frame 1 and located inside the front housing 4.

[0049] The two drive motors 93 located inside the front of the vehicle are both mounted on the front frame 1 and located inside the front housing 4.

[0050] Furthermore, in a preferred embodiment, it further includes a hydraulic drive device, which is mounted on the front frame 1 and located inside the front housing 4.

[0051] Furthermore, in a preferred embodiment, the three-degree-of-freedom connection device 2 includes: a front connecting frame 21, a middle connecting frame 22, a rear connecting frame 23, a swing hydraulic cylinder 24, and a torsion motor 25. The front connecting frame 21 is connected to the rear end of the vehicle front frame 1, the rear connecting frame 23 is connected to the front end of the vehicle body, the torsion motor 25 is mounted at the rear end of the middle connecting frame 22, the output shaft of the torsion motor 25 is horizontally arranged in the front-rear direction, and the output shaft of the torsion motor 25 extends from the front end of the middle connecting frame 22. The front end of the connecting frame 22 and the rear end of the front connecting frame 21 are rotatably connected by a vertically arranged rotating shaft. The main body of the torsion motor 25 and the rear connecting frame 23 are rotatably connected by rotating shafts arranged horizontally in the left and right directions. Two swing hydraulic cylinders 24 are symmetrically arranged on the left and right sides of the middle connecting frame 22. The cylinder body of each swing hydraulic cylinder 24 is rotatably connected to the middle connecting frame 22, and the end of the cylinder rod of each swing hydraulic cylinder 24 is rotatably connected to the front connecting frame 21. Both swing hydraulic cylinders 24 are connected to the hydraulic drive device through hydraulic pipelines.

[0052] Furthermore, in a preferred embodiment, it further includes: a mechanical support 5 and an agricultural implement 6. The mechanical support 5 includes: a rotating base 51, a base bracket 52, a support arm 53, and an adjusting hydraulic cylinder 54. The base bracket 52 is installed at the rear end of the head frame 1 and above the three-degree-of-freedom connection device 2. The rotating base 51 is rotatably mounted on the base bracket 52. Multiple support arms 53 are rotatably connected in sequence. The end of the lowermost support arm 53 is connected to the rotating base 51, and the end of the uppermost support arm 53 is rotatably connected to the agricultural implement 6. Any two adjacent support arms 53 are rotatably connected to the two ends of an adjusting hydraulic cylinder 54, and the included angle between the two support arms 53 is adjusted by the adjusting hydraulic cylinder 54. The uppermost support arm 53 and the agricultural implement 6 are rotatably connected to the two ends of an adjusting hydraulic cylinder 54, and the working angle of the agricultural implement 6 is adjusted by the adjusting hydraulic cylinder 54. Multiple adjusting hydraulic cylinders 54 are all connected to the hydraulic drive device through hydraulic pipelines.

[0053] The mechanical support 5 also includes a rotation drive motor, which is mounted on the base support 52 and is used to drive the rotating base 51 to rotate. The rotation drive motor is connected to the battery pack 92 via a circuit.

[0054] Furthermore, in a preferred embodiment, the mechanical support 5 further includes: a telescopic rod 56, a telescopic hydraulic cylinder 57, and a supporting foot 58. Two hollow tubes are symmetrically arranged on the left and right sides of the base support 52, and both hollow tubes are inclined downwards. Each telescopic rod 56 is slidably installed in a hollow tube, and the lower end of each telescopic rod 56 is rotatably connected to a supporting foot 58. One end of each telescopic hydraulic cylinder 57 is connected to a hollow tube, and the other end of the telescopic hydraulic cylinder 57 is connected to the telescopic rod 56 located in the hollow tube. Both telescopic hydraulic cylinders 57 are connected to the hydraulic drive device through hydraulic pipelines.

[0055] Furthermore, in a preferred embodiment, the vehicle body includes: a body frame 3, the body frame 3 and the rear connecting frame 23 are detachably connected, and two drive motors 93 located inside the vehicle body are both mounted on the body frame 3.

[0056] Furthermore, in a preferred embodiment, the vehicle body is a fire truck body or a transport vehicle body;

[0057] The fire truck body also includes: a water tank 81 and a fire hydrant 82. The water tank 81 is installed above the vehicle frame 3, and the fire hydrant 82 is rotatably installed above the water tank 81.

[0058] The transport vehicle also includes: pillars 84, multiple pillars 84 are symmetrically arranged on the left and right sides of the body frame 3 and are all connected to the upper surface of the body frame 3;

[0059] The vehicle body also includes an electric winch 83, which is mounted at the rear end of the vehicle frame 3.

[0060] Furthermore, in a preferred embodiment, the agricultural implement 6 is a hook bucket 61, a vibratory hammer 62, a grass-cutting head 63, a vibratory harvesting head 64, a circular saw 65, a land clearing head 66, a grab saw 67, or a pit-drilling head 68.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0062] In addition to the above, the present invention also has the following embodiments:

[0063] In a further embodiment of the present invention, the multi-functional vehicle adopts a modular design. Different types of vehicle bodies can be selected and assembled on the three-degree-of-freedom connection device 2 connected to the vehicle head according to usage requirements, realizing the modular design of the vehicle head and body. Agricultural implements 6 are detachably assembled on the drive end of the mechanical support 5. By assembling different types of agricultural implements 6, different types of work can be performed. The vehicle head is provided with multiple hydraulic interfaces and circuit interfaces, which can realize the detachable assembly with multiple motors and hydraulic cylinders. Drive motors and hydraulic cylinders can be added to the mechanical support 5 as needed. Various implements, including an electric winch 83, are detachably assembled at the rear end of the vehicle body. Multiple tracked wheel walking structures 7 also form a complete structure on their own and are detachably assembled in the vehicle head or body. Each walking drive motor 93 is individually connected to a tracked wheel walking structure 7 to realize drive. After connecting with the walking drive motor 93 inside it, the walking function can be realized.

[0064] In a further embodiment of the present invention, the tracked wheel walking structure 7 adopts a modular design with the vehicle head or body. Each walking drive motor 93 is individually connected to one tracked wheel walking structure 7 to achieve driving. After being connected to the walking drive motor 93 inside it, the walking function can be realized. It is easy to install and the wheel-track conversion is quick. The tracked wheel walking structure 7 can be replaced with a wheel structure or a track structure.

[0065] In a further embodiment of the present invention, in the tracked wheel walking structure 7, two wheels are installed on the outer side of the wheel frame, and the track covers the outer periphery of the two wheels and is in a tensioned state. During assembly, the tires are inflated and automatically tightened, making it difficult for the track to come off. It combines the advantages of tracks and wheels. The track protects the tires, increases the force-bearing area, improves grip, and increases stability.

[0066] In a further embodiment of the present invention, the multi-functional vehicle adopts a modular design, which is simple in structure, easy to assemble, has low processing cost, and is suitable for use in woodlands.

[0067] In a further embodiment of the present invention, the multi-functional vehicle is an electric vehicle powered by a battery pack 92. The battery pack 92 is charged by installing a range extender 91 in the front of the vehicle. The range extender 91 is a commercially available model and is not designed separately. The range extender 91 can generate electricity when the battery pack 92 has a low charge. The battery pack 92 supplies power to the vehicle, ensuring normal operation and avoiding the inability to work due to low charge. This improves the driving range and reduces environmental pollution.

[0068] In a further embodiment of the present invention, within the three-degree-of-freedom connection device 2, the output shaft of the torsion motor 25, the front end of the middle connecting frame 22, and the rear end of the front connecting frame 21 are rotatably connected by a vertically arranged rotating shaft. When the torsion motor 25 is working, it can drive the output shaft to rotate, thereby causing the middle connecting frame 22 and the front connecting frame 21 to rotate synchronously, thus realizing the torsion function between the front of the vehicle and the vehicle body. Two swing hydraulic cylinders 24 are symmetrically arranged on the left and right sides of the middle connecting frame 22. The cylinder body of each swing hydraulic cylinder 24 is rotatably connected to the middle connecting frame 22, and the end of the cylinder rod of each swing hydraulic cylinder 24 is rotatably connected to the front connecting frame 21. By driving the two swing hydraulic cylinders 24 to work respectively, the left and right swing function between the front of the vehicle and the vehicle body can be realized. The main body of the torsion motor 25 and the rear connecting frame 23 are rotatably connected by a rotating shaft arranged horizontally in the left and right directions, thus realizing the up and down swing function between the front of the vehicle and the vehicle body.

[0069] In a further embodiment of the present invention, the swing bridge of the three-degree-of-freedom connecting device 2 is composed of a front connecting frame 21, a middle connecting frame 22 and a rear connecting frame 23. The swing bridge and hinge position of the three-degree-of-freedom connecting device 2 can swing. For road surface undulations, including vertical steps and up-and-down fluctuations, the suspension structure ensures that the eight wheels can always keep close to the ground, which is suitable for uneven road surfaces. The swing bridge and hinge position can be locked and not swing, which is suitable for passing through ditches.

[0070] In a further embodiment of the present invention, the multi-purpose vehicle is an electric vehicle powered by a battery pack 92. In order to extend the driving range of a pure electric vehicle, a range extender 91 is added to the power system of the multi-purpose vehicle. When the battery pack 92 is low on power, the range extender 91 generates electricity to provide energy to the whole vehicle, thereby increasing the driving range.

[0071] In a further embodiment of the present invention, the mechanical support 5 is provided with a telescopic rod 56, a telescopic hydraulic cylinder 57, and a supporting foot 58. When the multi-functional vehicle stops moving and performs operations by passing through the mechanical support 5 or the vehicle body, the two telescopic hydraulic cylinders 57 drive the two supporting feet 58 to abut against the ground to support the vehicle body, thereby increasing the stability of the operation.

[0072] In a further embodiment of the present invention, the working position of the agricultural implement 6 mounted on the mechanical support 5 can be adjusted by driving the rotating base 51 to rotate by rotating the drive motor. Multiple support arms 53 are connected in sequence and can be adjusted by driving multiple adjusting hydraulic cylinders 54. When any two adjacent support arms 53 are installed on the inner side, the adjusting hydraulic cylinder 54 can directly push the upper support arm 53 to rotate. When the adjusting hydraulic cylinder 54 is installed on the outer side, the adjusting hydraulic cylinder 54 needs to cooperate with the linkage structure to pull the upper support arm 53 to rotate.

[0073] In a further embodiment of the present invention, the hydraulic drive device adopts an existing model on the market without additional design. Its output end is equipped with a solenoid valve to realize the individual drive of multiple hydraulic cylinders. Multiple motors and solenoid valves are connected to the control system. The control system is connected to the remote control device. Multiple motors and solenoid valves can be remotely controlled through the remote control device to realize unmanned remote control and reduce the risk of manual driving.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A forestry range-extended tracked multi-functional vehicle, characterized in that, include: The vehicle head, body and three-degree-of-freedom connection device (2) are connected by the three-degree-of-freedom connection device (2); the tracked wheel travel structure (7) is rotatably installed on the left and right sides of the vehicle head; the tracked wheel travel structure (7) is rotatably installed on the left and right sides of the body. The vehicle includes a range extender (91), a battery pack (92), and a drive motor (93). The drive motor (93) is installed in both the front and the body of the vehicle. Each drive motor (93) drives a tracked wheel walking structure (7). Multiple drive motors (93) are connected to the battery pack (92) via wiring. The battery pack (92) and the range extender (91) are connected via wiring. Each tracked wheel travel structure (7) includes: a wheel frame, a wheel and a track. The inner side of the wheel frame is provided with a long shaft, which is rotatably installed in the front or body of the vehicle. Two wheels are installed on the outer side of the wheel frame. The track covers the outer periphery of the two wheels and is in a tensioned state. Each travel drive motor (93) drives the two wheels to rotate synchronously. Each tracked wheel walking structure (7) also includes: a chain drive mechanism, which is installed in the wheel frame. The chain drive mechanism includes: a driving sprocket, a driven sprocket and a drive chain. Driven sprockets are installed on the shafts of both wheels. The driving sprocket is installed in the wheel frame and located between the two driven sprockets. The driving sprocket and the two driven sprockets are connected by a drive chain. The walking drive motor (93) drives the driving sprocket to rotate and thus drives the two wheels to rotate synchronously. The three-degree-of-freedom connection device (2) includes: a front connecting frame (21), a middle connecting frame (22), a rear connecting frame (23), a swing hydraulic cylinder (24), and a torsion motor (25). The front connecting frame (21) is connected to the rear end of the front frame (1), and the rear connecting frame (23) is connected to the front end of the vehicle body. The torsion motor (25) is installed at the rear end of the middle connecting frame (22). The output shaft of the torsion motor (25) is arranged horizontally along the front and rear directions. The output shaft of the torsion motor (25) extends from the front end of the middle connecting frame (22). The output shaft of the torsion motor (25) and the middle connecting frame (23) are connected. The front end of the frame (22) and the rear end of the front connecting frame (21) are rotatably connected by a vertically set rotating shaft. The main body of the torsion motor (25) and the rear connecting frame (23) are rotatably connected by a rotating shaft arranged horizontally in the left and right directions. Two swing hydraulic cylinders (24) are symmetrically arranged on the left and right sides of the middle connecting frame (22). The cylinder body of each swing hydraulic cylinder (24) is rotatably connected to the middle connecting frame (22), and the end of the cylinder rod of each swing hydraulic cylinder (24) is rotatably connected to the front connecting frame (21). Both swing hydraulic cylinders (24) are connected to the hydraulic drive device through hydraulic pipelines.

2. The forestry range-extended tracked multi-functional vehicle according to claim 1, characterized in that, The vehicle head includes: a vehicle head frame (1) and a vehicle head shell (4), wherein the vehicle head shell (4) is mounted on top of the vehicle head frame (1), and the range extender (91) and the battery pack (92) are both mounted on the vehicle head frame (1) and located inside the vehicle head shell (4); the two drive motors (93) located inside the vehicle head are both mounted on the vehicle head frame (1) and located inside the vehicle head shell (4).

3. The forestry range-extended tracked multi-functional vehicle according to claim 2, characterized in that, Also includes: A hydraulic drive unit is mounted on the front frame (1) and located inside the front housing (4).

4. The forestry range-extended tracked multi-functional vehicle according to claim 1, characterized in that, Also includes: The mechanical support (5) and agricultural implements (6) include: a rotating base (51), a base bracket (52), support arms (53), and an adjusting hydraulic cylinder (54). The base bracket (52) is installed at the rear end of the machine head frame (1) and above the three-degree-of-freedom connection device (2). The rotating base (51) is rotatably mounted on the base bracket (52). Multiple support arms (53) are rotatably connected in sequence. The end of the lowest support arm (53) is connected to the rotating base (51), and the end of the highest support arm (53) is connected to the rotating base (51). The end of the support arm (53) is rotatably connected to the agricultural implement (6); any two adjacent support arms (53) are rotatably connected to the two ends of an adjusting hydraulic cylinder (54), and the angle between the two support arms (53) is adjusted by the adjusting hydraulic cylinder (54); the uppermost support arm (53) and the agricultural implement (6) are rotatably connected to the two ends of an adjusting hydraulic cylinder (54), and the working angle of the agricultural implement (6) is adjusted by the adjusting hydraulic cylinder (54); multiple adjusting hydraulic cylinders (54) are connected to the hydraulic drive device through hydraulic pipelines. The mechanical support (5) further includes a rotation drive motor, which is mounted on the base support (52) and is used to drive the rotating base (51) to rotate. The rotation drive motor is connected to the battery pack (92) via a line.

5. The forestry range-extended tracked multi-functional vehicle according to claim 4, characterized in that, The mechanical support (5) further includes: a telescopic rod (56), a telescopic hydraulic cylinder (57), and a support foot (58). Two hollow tubes are symmetrically arranged on the left and right sides of the base support (52). Both hollow tubes are inclined downwards. Each telescopic rod (56) is slidably installed in a hollow tube. The lower end of each telescopic rod (56) is rotatably connected to a support foot (58). One end of each telescopic hydraulic cylinder (57) is connected to a hollow tube. The other end of the telescopic hydraulic cylinder (57) is connected to the telescopic rod (56) located in the hollow tube. Both telescopic hydraulic cylinders (57) are connected to the hydraulic drive device through hydraulic pipelines.

6. The forestry range-extended tracked multi-functional vehicle according to claim 1, characterized in that, The vehicle body includes a body frame (3), which is detachably connected to a rear connecting frame (23). Two drive motors (93) located inside the vehicle body are mounted on the body frame (3).

7. The forestry range-extended tracked multi-functional vehicle according to claim 1, characterized in that, The vehicle body is either a fire engine body or a transport vehicle body; The fire truck body also includes: a water tank (81) and a fire hydrant (82), wherein the water tank (81) is installed above the vehicle frame (3), and the fire hydrant (82) is rotatably installed above the water tank (81); The vehicle body also includes: pillars (84), multiple pillars (84) are symmetrically arranged on the left and right sides of the vehicle frame (3) and are all connected to the upper surface of the vehicle frame (3); the vehicle body also includes: an electric winch (83), the electric winch (83) is installed at the rear end of the vehicle frame (3).

8. The forestry range-extended tracked multi-functional vehicle according to claim 4, characterized in that, Agricultural machinery (6) includes hook bucket (61), vibratory hammer (62), grass cutter head (63), vibratory harvesting head (64), circular saw (65), land clearing head (66), grab saw (67) or pit drill head (68).

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