Extended-range type multifunctional vehicle with covering wheels for forests

Abstract

The invention discloses a forest extended-range crawler wheel multifunctional vehicle, relates to the technical field of forestry automation equipment, and solves the problems that a wheel type forest power vehicle and a crawler type forest power vehicle have mutual advantages and disadvantages and are difficult to adapt to complex terrains of forest land. Different types of vehicle bodies can be selected according to use requirements to be assembled on the three-degree-of-freedom connecting device connected with the vehicle head, the agricultural machine tool is detachably assembled at the driving end of the mechanical support, different types of work can be carried out by assembling different types of agricultural machine tools, and the vehicle head is provided with a plurality of hydraulic interfaces and circuit interfaces. A plurality of motors and hydraulic cylinders can be detachably assembled, and a walking function can be realized after the crawler wheel walking structure is connected with a walking driving motor in the crawler wheel walking structure; when the crawler wheel walking structure is assembled, tires are inflated to be automatically tensioned, the crawler wheel walking structure is not prone to disengaging, the advantages of a crawler and a wheel are integrated, the crawler protects the tires, the stress area is increased, meanwhile, the road holding force is improved, and the stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of forestry automation equipment, and in particular to an extended-range crawler-wheel multifunctional vehicle for forestry. Background Art

[0002] my country has a large forest coverage area, with complex and changeable terrain in forest areas, rugged and muddy roads. Wheeled vehicles are prone to sinking into the mud during driving, and crawler vehicles are prone to dragging if they are not maintained in time or interact with tree roots and other debris. Therefore, higher requirements are placed on the stability and safety of forest extended-range crawler multi-purpose vehicles, and ordinary forest power vehicles are difficult to adapt to the complex terrain of forests.

[0003] With the continuous consumption of petroleum energy and the introduction of increasingly stringent emission regulations, new energy vehicles, as a means of transportation with low emissions and less pollution, have been widely valued by vehicle manufacturers, and the development of new energy vehicles has become an urgent task for the automotive industry. Pure electric vehicles rely entirely on drive motors to drive the vehicle, and their energy comes from the power grid, achieving zero fuel consumption and zero emissions. However, they are currently limited by the level of power batteries, and the vehicle's driving range is limited, which cannot meet the daily use needs of users. Applying it to forest power vehicles is difficult to meet the working needs of forest power vehicles. Summary of the invention

[0004] In view of the above-mentioned problem that wheeled and tracked forest power vehicles have their own advantages and disadvantages and are difficult to adapt to the complex terrain of forest land, the purpose of the present invention is to provide a forest extended-range crawler-wheeled multi-purpose vehicle. Aiming at the complex terrain of forest areas, the present invention designs a forest extended-range crawler-wheeled multi-purpose vehicle, which has good climbing and obstacle crossing capabilities and meets the use requirements under complex site conditions in forest land. At the same time, in order to extend the driving range of pure electric vehicles, a range extender is added to the power system of the multi-purpose vehicle. When the battery power is insufficient, the range extender generates electricity to provide energy to the entire vehicle, thereby achieving the purpose of increasing the driving range.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A multifunctional forestry vehicle with extended-range crawler wheels, comprising:

[0007] The front of the vehicle, the body and the three-degree-of-freedom connecting device 2, the front of the vehicle and the body are connected by the three-degree-of-freedom connecting device 2;

[0008] A crawler wheel walking structure 7, a crawler wheel walking structure 7 is rotatably installed on the left and right sides of the front of the vehicle; a crawler wheel walking structure 7 is rotatably installed on the left and right sides of the vehicle body;

[0009] Range extender 91, battery pack 92 and travel drive motor 93. Travel drive motors 93 are installed in the front and body of the vehicle. Each travel drive motor 93 drives a crawler wheel travel structure 7 to operate. Multiple travel drive motors 93 are connected to the battery pack 92 through lines, and the battery pack 92 and range extender 91 are connected through lines.

[0010] Each crawler wheel walking structure 7 includes: a wheel frame, wheels and tracks. A long axis is provided on the inner side of the wheel frame, and the long axis is rotatably installed in the front of the vehicle or the vehicle body. Two wheels are installed on the outer side of the wheel frame. The tracks are simultaneously covered on the outer circumference of the two wheels and are in a tensioned state. Each walking drive motor 93 drives the two wheels to rotate synchronously.

[0011] The above-mentioned forest extended-range tracker wheel multi-purpose vehicle, wherein each tracker wheel walking structure 7 also includes: a chain transmission mechanism, the chain transmission mechanism is installed in the wheel frame, the chain transmission mechanism includes: a driving sprocket, a driven sprocket and a transmission chain, the driven sprockets are installed on the rotating shafts of the two wheels, the driving sprocket is installed in the wheel frame and is arranged between the two driven sprockets, the driving sprocket and the two driven sprockets are connected by a transmission chain, and the walking drive motor 93 drives the driving sprocket to rotate and then drives the two wheels to rotate synchronously.

[0012] The above-mentioned forestry extended-range crawler-wheel multi-purpose vehicle, wherein the front of the vehicle comprises: a front frame 1 and a front outer shell 4, wherein the front outer shell 4 is mounted above the front frame 1, and the range extender 91 and the battery pack 92 are both mounted on the front frame 1 and located in the front outer shell 4;

[0013] The two travel drive motors 93 located in the locomotive head are both mounted on the locomotive head frame 1 and located in the locomotive head outer shell 4 .

[0014] The above-mentioned extended-range crawler-wheel multi-purpose vehicle for forest use further includes: a hydraulic drive device, which is installed on the front frame 1 and located in the front outer shell 4.

[0015] The above-mentioned forest extended-range crawler-wheel multi-purpose vehicle, wherein 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, 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, and 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 through a vertically arranged rotating shaft, the main body of the torsion motor 25 and the rear connecting frame 23 are rotatably connected through a rotating shaft arranged horizontally along the left and right directions, and the 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, the cylinder rod end of each swing hydraulic cylinder 24 is rotatably connected to the front connecting frame 21, and the two swing hydraulic cylinders 24 are connected to the hydraulic drive device through hydraulic pipelines.

[0016] The above-mentioned forest extended-range crawler-wheel multifunctional vehicle, among which, also includes: a mechanical support 5 and an agricultural machine 6, wherein the mechanical support 5 includes: a rotating base 51, a base support 52, a support arm 53 and an adjusting hydraulic cylinder 54, wherein the base support 52 is mounted at the rear end of the vehicle head frame 1 and is located above the three-degree-of-freedom connection device 2, and the rotating base 51 is rotatably mounted on the base support 52; a plurality of support arms 53 are rotatably connected in sequence; the end of the support arm 53 located at the bottom is connected to the rotating base 51, and the end of the support arm 53 located at the top is rotatably connected to the agricultural machine 6; any two adjacent support arms 53 are rotatably connected to the two ends of an adjusting hydraulic cylinder 54, respectively, and the angle between the two support arms 53 is adjusted by the adjusting hydraulic cylinder 54; the support arm 53 located at the top and the agricultural machine 6 are rotatably connected to the two ends of an adjusting hydraulic cylinder 54, respectively, and the working angle of the agricultural machine 6 is adjusted by the adjusting hydraulic cylinder 54, and the plurality of adjusting hydraulic cylinders 54 are all connected to the hydraulic drive device through hydraulic pipelines;

[0017] The mechanical support 5 further includes: a rotation drive motor, which is installed 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 through a line.

[0018] The above-mentioned extended-range track-wheeled multi-purpose vehicle for forestry, wherein the mechanical support 5 also 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 the two hollow tubes are inclined obliquely downward. 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. The two telescopic hydraulic cylinders 57 are connected to the hydraulic drive device through a hydraulic pipeline.

[0019] The above-mentioned forest extended-range crawler-wheel multi-purpose vehicle, wherein the body includes: a body frame 3, the body frame 3 and the rear connecting frame 23 are detachably connected, and the two travel drive motors 93 located in the body are both installed on the body frame 3.

[0020] The above-mentioned forest extended-range crawler-wheel multi-purpose vehicle, wherein the vehicle body is a fire-extinguishing vehicle body or a transport vehicle body;

[0021] The fire-extinguishing vehicle body further includes: a water tank 81 and a fire hydrant 82, wherein the water tank 81 is mounted above the vehicle body frame 3, and the fire hydrant 82 is rotatably mounted above the water tank 81;

[0022] The transport vehicle body further includes: columns 84, a plurality of columns 84 are symmetrically arranged on the left and right sides of the vehicle body frame 3 and are all connected to the upper surface of the vehicle body frame 3;

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

[0024] In the above-mentioned extended-range crawler-wheel multi-purpose vehicle for forestry, the agricultural machinery 6 is a hook bucket 61, a vibrating hammer 62, a mowing head 63, a vibrating picking head 64, a circular saw 65, a clearing head 66, a grab saw 67 or a drilling head 68.

[0025] Due to the adoption of the above technology, the present invention has the following positive effects compared with the prior art:

[0026] (1) In the present invention, the multifunctional vehicle adopts a modular design. Different types of vehicle bodies can be selected according to the use requirements and assembled on the three-degree-of-freedom connection device connected to the vehicle head, so as to realize the modular design of the vehicle head and the vehicle body. The agricultural machinery and implements can be detachably assembled on the driving end of the mechanical bracket. By assembling different types of agricultural machinery and implements, different types of work can be performed. The vehicle head is provided with a plurality of hydraulic interfaces and circuit interfaces, which can realize the detachable assembly with a plurality of motors and hydraulic cylinders. The rear end of the vehicle body can be detachably assembled with a variety of implements including an electric winch. The plurality of crawler wheel walking structures also form a complete structure separately, which can be detachably assembled in the vehicle head or the vehicle body. Each walking drive motor is separately connected to a crawler wheel walking structure to realize driving. After being connected to the walking drive motor inside the walking structure, the walking function can be realized.

[0027] (2) In the present invention, the multi-purpose vehicle is an electric vehicle powered by a battery pack. By assembling a range extender in the front of the vehicle to charge the battery pack, the range extender can generate electricity when the battery pack is low in power. The battery pack supplies power to the vehicle to ensure normal operation, avoid the situation where the vehicle cannot operate due to low power, improve endurance, and reduce pollution to the environment;

[0028] (3) In the present invention, in the track-wheel walking structure, two wheels are installed on the outside of the wheel frame, and the track is simultaneously wrapped around the outer circumference of the two wheels and is in a tensioned state. During assembly, the tire is automatically inflated and tightened, and it is not easy to fall off the track. The advantages of the track and the wheel are combined. The track protects the tire, increases the force-bearing area, improves the grip, and increases stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The invention is a schematic structural diagram of a forest range-extended crawler-wheel multi-purpose vehicle.

[0030] Figure 2 The utility model is a side view of a forest extended-range crawler-wheel multi-purpose vehicle of the present invention.

[0031] Figure 3 The utility model is a front view of a forestry extended-range crawler-wheel multi-functional vehicle of the present invention.

[0032] Figure 4 The invention is a schematic structural diagram of a forest range-extended crawler-wheel multi-purpose vehicle without a vehicle head outer shell.

[0033] Figure 5 The invention is a schematic structural diagram of a forest range-extended crawler-wheel multi-purpose vehicle without a vehicle body.

[0034] Figure 6 The present invention is a schematic structural diagram of a mechanical support of a forest range-extended crawler-wheel multi-purpose vehicle.

[0035] Figure 7 The invention is a schematic structural diagram of a three-degree-of-freedom connection device of a forest range-extended crawler-wheel multi-purpose vehicle.

[0036] Figure 8 The invention is a top view of a three-degree-of-freedom connection device of a forest range-extended crawler-wheel multi-purpose vehicle.

[0037] Fig. 9 The present invention is a schematic structural diagram of a fire-fighting vehicle body of a forest extended-range crawler-wheel multi-functional vehicle.

[0038] Fig.10 The present invention is a schematic structural diagram of a transport body of a forest range-extended crawler-wheel multi-purpose vehicle.

[0039] Fig.11 and Fig.12 The diagram is an example of some agricultural machinery that can be loaded on a machine support.

[0040] In the attached drawings: 1. front frame; 2. three-degree-of-freedom connection device; 3. body frame; 4. front outer shell; 5. mechanical support; 6. agricultural machinery and implements; 7. track 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. adjustment hydraulic cylinder; 56. telescopic rod; 57. telescopic hydraulic cylinder; 58. support foot; 61. hook bucket; 62. vibration hammer; 63. mowing head; 64. vibration picking head; 65. circular saw; 66. clearing head; 67. grab saw; 68. drilling head; 81. water tank; 82. fire hydrant; 83. electric winch; 84. column; 91. range extender; 92. battery pack; 93. travel drive motor. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0042] Please refer to Figures 1 to 12 As shown, a forest range-extended crawler-wheel multi-purpose vehicle is shown, which includes:

[0043] The front of the vehicle, the body and the three-degree-of-freedom connecting device 2, the front of the vehicle and the body are connected by the three-degree-of-freedom connecting device 2;

[0044] A crawler wheel walking structure 7, a crawler wheel walking structure 7 is rotatably installed on the left and right sides of the front of the vehicle; a crawler wheel walking structure 7 is rotatably installed on the left and right sides of the vehicle body;

[0045] Range extender 91, battery pack 92 and travel drive motor 93. Travel drive motors 93 are installed in the front and body of the vehicle. Each travel drive motor 93 drives a crawler wheel travel structure 7 to operate. Multiple travel drive motors 93 are connected to the battery pack 92 through lines, and the battery pack 92 and range extender 91 are connected through lines.

[0046] Each crawler wheel walking structure 7 includes: a wheel frame, wheels and tracks. A long axis is provided on the inner side of the wheel frame, and the long axis is rotatably installed in the front of the vehicle or the body. Two wheels are installed on the outer side of the wheel frame. The tracks are simultaneously covered on the outer circumference of the two wheels and are in a tensioned state. Each walking drive motor 93 drives the two wheels to rotate synchronously.

[0047] Furthermore, in a preferred embodiment, each track wheel walking structure 7 also includes: a chain transmission mechanism, the chain transmission mechanism is installed in the wheel frame, the chain transmission mechanism includes: a driving sprocket, a driven sprocket and a transmission chain, the driven sprockets are installed on the rotating shafts of the two wheels, the driving sprocket is installed in the wheel frame and is arranged between the two driven sprockets, the driving sprocket and the two driven sprockets are connected by a transmission chain, and the walking drive motor 93 drives the driving sprocket to rotate and then drives the two wheels to rotate synchronously.

[0048] Further, in a preferred embodiment, the front of the vehicle comprises: a front frame 1 and a front outer shell 4, the front outer shell 4 is mounted above the front frame 1, and the range extender 91 and the battery pack 92 are both mounted on the front frame 1 and located in the front outer shell 4;

[0049] The two travel drive motors 93 located in the locomotive head are both mounted on the locomotive head frame 1 and located in the locomotive head outer shell 4 .

[0050] Furthermore, in a preferred embodiment, it also includes: a hydraulic drive device, which is installed on the head frame 1 and located in the head outer shell 4.

[0051] Further, 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 front frame 1, 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 horizontally arranged in the front and rear directions, the output shaft of the torsion motor 25 extends from the front end of the middle connecting frame 22, and the output shaft of the torsion motor 25, the middle connecting frame 22, and the rear connecting frame 23 are connected to the front end of the vehicle body. The front end of the connecting frame 22 and the rear end of the front connecting frame 21 are rotatably connected via a vertically arranged rotating shaft, the main body of the torsion motor 25 and the rear connecting frame 23 are rotatably connected via a rotating shaft horizontally arranged along the left and right directions, and the 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, the cylinder rod end of each swing hydraulic cylinder 24 is rotatably connected to the front connecting frame 21, and the two swing hydraulic cylinders 24 are connected to the hydraulic drive device through hydraulic pipelines.

[0052] Further, in a preferred embodiment, it also includes: a mechanical support 5 and an agricultural machine 6, the mechanical support 5 includes: a rotating base 51, a base support 52, a support arm 53 and an adjusting hydraulic cylinder 54, the base support 52 is installed at the rear end of the vehicle frame 1 and is located above the three-degree-of-freedom connection device 2, and the rotating base 51 is rotatably installed on the base support 52; multiple support arms 53 are rotatably connected in sequence; the end of the support arm 53 located at the bottom is connected to the rotating base 51, and the end of the support arm 53 located at the top is rotatably connected to the agricultural machine 6; any two adjacent support arms 53 are rotatably connected to the two ends of an adjusting hydraulic cylinder 54, respectively, and the angle between the two support arms 53 is adjusted by the adjusting hydraulic cylinder 54; the support arm 53 located at the top and the agricultural machine 6 are rotatably connected to the two ends of an adjusting hydraulic cylinder 54, respectively, and the working angle of the agricultural machine 6 is adjusted by the adjusting hydraulic cylinder 54, and multiple adjusting hydraulic cylinders 54 are connected to the hydraulic drive device through hydraulic pipelines;

[0053] The mechanical support 5 also includes: a rotation drive motor, which is installed 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 through a line.

[0054] Furthermore, in a preferred embodiment, the mechanical support 5 also 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. The two hollow tubes are inclined obliquely downward. Each telescopic rod 56 is slidably installed in a hollow tube. 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. The two telescopic hydraulic cylinders 57 are connected to the hydraulic drive device through a hydraulic pipeline.

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

[0056] Further, in a preferred embodiment, the vehicle body is a fire-extinguishing vehicle body or a transport vehicle body;

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

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

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

[0060] Furthermore, in a preferred embodiment, the agricultural machinery 6 is a hook bucket 61, a vibrating hammer 62, a mowing head 63, a vibrating picking head 64, a circular saw 65, a clearing head 66, a grab saw 67 or a drilling head 68.

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

[0062] The present invention also has the following implementation modes based on the above:

[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 according to usage requirements and assembled on the three-degree-of-freedom connection device 2 connected to the front of the vehicle, so as to realize the modular design of the front of the vehicle and the vehicle body. The agricultural machinery 6 can be detachably assembled on the driving end of the mechanical support 5. By assembling different types of agricultural machinery 6, different types of work can be performed. A plurality of hydraulic interfaces and circuit interfaces are provided on the front of the vehicle, which can realize the detachable assembly with a plurality of motors and hydraulic cylinders. The driving motor and hydraulic cylinder can be added to the mechanical support 5 as needed. The rear end of the vehicle body can be detachably assembled with a variety of machinery including an electric winch 83. A plurality of track wheel walking structures 7 also form a complete structure separately, which can be detachably assembled in the front of the vehicle or the vehicle body. Each walking drive motor 93 is separately connected to a track wheel walking structure 7 to realize drive, and the walking function can be realized after being connected to the walking drive motor 93 inside it.

[0064] In a further embodiment of the present invention, the track-wheel walking structure 7 and the front or body of the vehicle adopt a modular design, and each travel drive motor 93 is individually connected to a track-wheel walking structure 7 to achieve drive. After being connected to the travel drive motor 93 inside it, the walking function can be achieved. The installation is convenient and the wheel-track conversion is quick. The track-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 crawler wheel walking structure 7, two wheels are installed on the outside of the wheel frame, and the track is simultaneously covered on the outer periphery of the two wheels and is in a tensioned state. During assembly, the tire is automatically tightened by inflation, and the track is not easy to fall off. The advantages of the track and the wheel are combined. The track protects the tire, increases the force-bearing area, improves the grip, and increases stability.

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

[0067] In a further embodiment of the present invention, the multi-purpose 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 adopts an existing model on the market and is not designed separately. The range extender 91 can generate electricity when the battery pack 92 is low in power. The battery pack 92 supplies power to the vehicle to ensure normal operation, avoid the situation where the operation cannot be performed due to low power, improve the endurance, and reduce pollution to the environment.

[0068] In a further embodiment of the present invention, in the three-degree-of-freedom connecting 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 through a vertically arranged rotating shaft. The torsion motor 25 can drive the output shaft to rotate, drive the middle connecting frame 22 and the front connecting frame 21 to rotate synchronously, and realize the function of twisting the front of the vehicle and the 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 cylinder rod end 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 function of left and right swinging between the front of the vehicle and the body can be realized. The main body of the torsion motor 25 and the rear connecting frame 23 are rotatably connected through a rotating shaft arranged horizontally along the left and right directions, so as to realize the function of up and down swinging between the front of the vehicle and the 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 the hinge position of the three-degree-of-freedom connecting device 2 can swing. For the ups and downs of the road surface, including vertical steps and up and down fluctuations, the suspension structure ensures that the eight wheels can always be close to the ground, which is suitable for uneven roads. The swing bridge and the hinge position can be locked and not swing, which is suitable for passing through gullies.

[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 the pure electric vehicle, a range extender 91 is added to the power system of the multi-purpose vehicle. When the battery pack 92 is insufficiently charged, the range extender 91 generates electricity to provide energy to the entire vehicle, thereby achieving the purpose of increasing the driving range.

[0071] In a further embodiment of the present invention, a telescopic rod 56, a telescopic hydraulic cylinder 57 and a supporting foot 58 are provided on the mechanical support 5. When the multi-purpose vehicle stops moving and operates through the mechanical support 5 or the vehicle body, the two supporting feet 58 are respectively driven to the ground by the two telescopic hydraulic cylinders 57 to support the vehicle body, thereby increasing the stability of the operation.

[0072] In a further embodiment of the present invention, the operating position of the agricultural machinery and implement 6 assembled on the mechanical support 5 can be adjusted by rotating the driving motor to drive the rotating base 51 to rotate, and the multiple support arms 53 are rotatably connected in sequence, and the operating position and angle of the agricultural machinery and implement 6 can be adjusted by driving the multiple adjusting hydraulic cylinders 54; for any two adjacent support arms 53, when the adjusting hydraulic cylinder 54 is installed on the inner side, the adjusting hydraulic cylinder 54 can directly push the support arm 53 on the upper side to rotate, and when the adjusting hydraulic cylinder 54 is installed on the outer side, the adjusting hydraulic cylinder 54 needs to cooperate with the connecting rod structure to pull the support arm 53 on the upper side 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. An electromagnetic valve is provided at its output end to realize separate driving of multiple hydraulic cylinders. Multiple motors and solenoid valves are connected to the control system, and the control system is connected to the remote control device signal. The multiple motors and solenoid valves can be remotely controlled by the remote control device to realize unmanned remote control and reduce the risk of manual driving.

[0074] The above are only 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 be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A forest extended-range crawler-wheel multi-purpose vehicle, characterized in that: include: A vehicle head, a vehicle body and a three-degree-of-freedom connecting device (2), wherein the vehicle head and the vehicle body are connected via the three-degree-of-freedom connecting device (2); A crawler wheel walking structure (7), wherein a crawler wheel walking structure (7) is rotatably mounted on the left and right sides of the vehicle head; and a crawler wheel walking structure (7) is rotatably mounted on the left and right sides of the vehicle body; A range extender (91), a battery pack (92) and a travel drive motor (93), wherein the travel drive motor (93) is installed in the front of the vehicle and in the vehicle body, each travel drive motor (93) drives a crawler wheel travel structure (7) to operate, and the plurality of travel drive motors (93) are connected to the battery pack (92) through a line, and the battery pack (92) and the range extender (91) are connected through a line; Each crawler wheel walking structure (7) comprises: a wheel frame, a wheel and a crawler track. A long shaft is provided on the inner side of the wheel frame, and the long shaft is rotatably mounted in the front of the vehicle or in the vehicle body. Two wheels are mounted on the outer side of the wheel frame. The crawler track simultaneously covers the outer circumference of the two wheels and is in a tensioned state. Each walking drive motor (93) drives the two wheels to rotate synchronously.

2. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 1, characterized in that: Each crawler wheel walking structure (7) also includes: a chain transmission mechanism, which is installed in the wheel frame, and the chain transmission mechanism includes: a driving sprocket, a driven sprocket and a transmission chain. The driven sprockets are installed on the rotating shafts of the two wheels. The driving sprocket is installed in the wheel frame and is arranged between the two driven sprockets. The driving sprocket and the two driven sprockets are connected by a transmission chain. The walking drive motor (93) drives the driving sprocket to rotate and then drives the two wheels to rotate synchronously.

3. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 1, characterized in that: The front of the vehicle comprises: a front frame (1) and a front outer shell (4), wherein the front outer shell (4) is mounted above the front frame (1), and the range extender (91) and the battery pack (92) are both mounted on the front frame (1) and located inside the front outer shell (4); The two travel drive motors (93) located in the locomotive head are both mounted on the locomotive head frame (1) and located in the locomotive head outer shell (4).

4. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 3, characterized in that: Also includes: A hydraulic drive device is mounted on a locomotive frame (1) and is located inside a locomotive outer shell (4).

5. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 4, characterized in that: The three-degree-of-freedom connection device (2) comprises: 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; 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 in 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 to the front end of the vehicle body; The front end of the frame (22) and the rear end of the front connecting frame (21) are rotatably connected via a vertically arranged rotating shaft, the main body of the torsion motor (25) and the rear connecting frame (23) are rotatably connected via a rotating shaft horizontally arranged along 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), the cylinder rod end of each swing hydraulic cylinder (24) is rotatably connected to the front connecting frame (21), and the two swing hydraulic cylinders (24) are both connected to the hydraulic drive device via a hydraulic pipeline.

6. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 4, characterized in that: Also includes: A machine support (5) and an agricultural machine (6), wherein the machine support (5) comprises: a rotating base (51), a base support (52), a support arm (53) and an adjusting hydraulic cylinder (54); the base support (52) is mounted at the rear end of a vehicle head frame (1) and is located above a three-degree-of-freedom connection device (2); the rotating base (51) is rotatably mounted on the base support (52); a plurality of support arms (53) are rotatably connected in sequence; the end of the support arm (53) at the bottom is connected to the rotating base (51), and the end of the support arm (53) at the top is connected to the rotating base (51). The ends are rotatably connected to the agricultural machinery (6); any two adjacent support arms (53) are rotatably connected to the two ends of an adjustable hydraulic cylinder (54), and the angle between the two support arms (53) is adjusted by the adjustable hydraulic cylinder (54); the support arm (53) and the agricultural machinery (6) at the uppermost end are rotatably connected to the two ends of an adjustable hydraulic cylinder (54), and the working angle of the agricultural machinery (6) is adjusted by the adjustable hydraulic cylinder (54), and the plurality of adjustable hydraulic cylinders (54) are connected to the hydraulic drive device through a hydraulic pipeline; The mechanical support (5) further comprises: a rotation drive motor, the rotation drive motor being mounted on the base support (52), the rotation drive motor being used to drive the rotating base (51) to rotate, and the rotation drive motor being connected to the battery pack (92) via a line.

7. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 6, characterized in that: The mechanical support (5) further comprises: 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); the two hollow tubes are inclined obliquely downward; each telescopic rod (56) is slidably installed in a hollow tube; 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; the other end of the telescopic hydraulic cylinder (57) is connected to the telescopic rod (56) located in the hollow tube; and the two telescopic hydraulic cylinders (57) are both connected to the hydraulic drive device through a hydraulic pipeline.

8. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 5, characterized in that: The vehicle body comprises a vehicle body frame (3), the vehicle body frame (3) and a rear connecting frame (23) are detachably connected, and two travel drive motors (93) located in the vehicle body are both mounted on the vehicle body frame (3).

9. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 8, characterized in that: The vehicle body is a fire-extinguishing vehicle body or a transport vehicle body; The fire-extinguishing vehicle body further comprises: a water tank (81) and a fire hydrant (82), wherein the water tank (81) is mounted above the vehicle body frame (3), and the fire hydrant (82) is rotatably mounted above the water tank (81); The transport vehicle body further comprises: columns (84), a plurality of columns (84) are symmetrically arranged on the left and right sides of the vehicle body frame (3) and are all connected to the upper surface of the vehicle body frame (3); The vehicle body also includes an electric winch (83), which is installed at the rear end of the vehicle body frame (3).

10. The forestry extended-range crawler-wheel multi-purpose vehicle according to claim 6, characterized in that: The agricultural machinery (6) is a hook bucket (61), a vibrating hammer (62), a mowing head (63), a vibrating picking head (64), a circular saw (65), a land reclamation head (66), a grab saw (67) or a drilling head (68).

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