Multipurpose tool car

Abstract

The invention discloses a multipurpose tool car which comprises an integral car frame and an integral car frame front extending part. A seat; a rear wheel set; a front wheel group; a steering assembly; a shed; the driving assembly comprises a first motor, a second motor and a battery pack; the battery pack is used for storing energy and providing electric energy for the first motor, the second motor and the externally-hung / externally-connected accessory; the generator provides electric energy supplement; the oil tank supplies fuel oil to the generator; the first motor and the second motor are installed on the rear wheel connecting seats corresponding to the left rear wheel and the right rear wheel respectively and provide the same-direction driving capacity and the different-direction driving capacity for the left rear wheel and the right rear wheel through the transmission control mechanism. And accessory mounting positions are arranged at one or more of the following positions: the lower part of the integral frame, the rear part of the integral frame, the upper part of the loading support part and the front part of the front extension part of the integral frame.

Description

Technical Field

[0001] The present application relates to the technical field of transportation vehicles, and in particular to a multi-purpose tool vehicle. Background Art

[0002] Traditional utility vehicles (such as agricultural transport vehicles and multi-purpose transport vehicles) generally use spring steel plate suspension and front and rear independent axle structures. Although their structure is relatively reliable, they have the following significant defects: The rigid layout of the vehicle, relying on independent front and rear axles and suspension systems, results in a complex and redundant structure, unnecessary weight increase, and poor maneuverability, making it unsuitable for multi-tasking or multi-purpose operations in small areas. Furthermore, the non-detachable fixed carport and traditional steering mechanism limit the vehicle's storage capacity in both height and length, resulting in excessive space usage during transport and transfer, making it particularly unsuitable for containerized or air freight transportation.

[0003] 2. Limited functional expandability: Existing vehicles are mostly designed for specific tasks and lack modular functional extension capabilities. They cannot be quickly changed to functional modes such as towing and transporting, agricultural machinery operations, etc., resulting in low equipment utilization and high expansion costs.

[0004] 3. Insufficient powertrain adaptability: Most vehicles use a single motor or engine to drive the wheels, lacking the flexible powertrain combination to cope with complex usage scenarios. Purely electric vehicles are limited by battery capacity, and their range cannot meet the demands of long-term, high-intensity operations. Fuel-powered vehicles, on the other hand, suffer from high noise, high pollution, and poor maneuverability.

[0005] 4. There is a general lack of off-road and escape capabilities. Most vehicles use a single traditional rear axle drive, with one side of the wheel hanging in the air or slipping, resulting in a loss of driving force for the entire vehicle, making them unsuitable for use in complex driving conditions.

[0006] The above content is only used to assist in understanding the technical solution of this application, and does not mean that the above content is the closest prior art to this application. Summary of the Invention

[0007] Based on this, the present application provides a multi-purpose tool vehicle that solves at least one of the above-mentioned technical problems.

[0008] The technical solution adopted by the present application to solve the technical problem is: a multi-purpose tool cart, comprising: An integral frame, the integral frame comprising a seat support portion, a loading support portion, and an integral frame front extension portion, the integral frame front extension portion being mounted at a front end of the seat support portion; a seat, mounted on the seat support; The rear wheel assembly includes a left rear wheel and a right rear wheel, each of which is rotatably mounted on a rear wheel connecting seat; The front wheel assembly, including two front wheels, is mounted directly below the seat support portion of the integral frame; A steering assembly is mounted on the front extension of the integral frame and connected to the front wheel set to control the steering of the front wheel set; A drive assembly, the drive assembly comprising a first motor, a second motor, and a battery pack, the battery pack being used to store energy and provide power to the first motor, the second motor, and external / attached accessories; A generator for providing electrical energy to the battery pack; Fuel tank, which provides fuel supply to the generator; The front and rear wheel groups both use low-pressure tires to achieve good tire grip while also achieving a shock-absorbing effect through tire deformation; The first motor and the second motor are respectively mounted on the rear wheel connecting seats at the corresponding positions of the left rear wheel and the right rear wheel, and provide the left rear wheel and the right rear wheel with the ability to drive in the same direction and the ability to drive in different directions through the transmission control mechanism; thereby, the independently driven rear wheels can move in opposite directions to achieve in-situ turning or small radius turning; One or more of the following positions are provided with an accessory mounting position: a lower portion of the integral frame, a rear portion of the integral frame, an upper portion of the loading support portion, and a front portion of the front extension portion of the integral frame.

[0009] In some embodiments, the steering assembly includes a steering column that can be deflected; the seat includes a seat cushion and a backrest that can be rotated to be straight relative to the seat cushion; thereby achieving a lower overall height of the vehicle when not in use.

[0010] In some embodiments, viewed from the front projection of the tool vehicle, the lower end of the steering column is arranged in the middle area of the front extension of the integral frame, and the upper end of the steering column is tilted toward the main driver's seat therein.

[0011] In some embodiments, the steering assembly further includes a steering gear housing, a movable rack, and a steering tie rod. Both ends of the steering gear housing are rotatably mounted on the front extension of the integral frame via bearings and / or rotating sleeves. The steering column extends into the steering gear housing and engages with the movable rack. One end of the movable rack is hinged to the steering tie rod, and the other end of the steering tie rod is hinged to the steering knuckle of one of the front wheels. A support rod is also sleeved on the rotating column, and the other end of the support rod is hinged to the area between the two seats on the integral frame. The support rod includes a sleeve and a socket. The depth of the socket inserted into the sleeve can be adjusted and locked to achieve length adjustment of the support rod. After the length of the support rod is adjusted, the rotating column can rotate together with the steering gear housing around the extension axis of the movable rack, so that the upper end of the steering column is offset to the front of the tool vehicle, so that the user can operate the steering wheel on the ground.

[0012] In some embodiments, the rear wheel connecting seat includes a left rear wheel connecting seat and a right rear wheel connecting seat, a transverse reinforcement rod is connected between the two, and the rear wheel axle of the rear wheel extends into the rear wheel connecting seat and is connected to the output shaft of the first motor / second motor through a gear box or sprocket.

[0013] In some embodiments, the integral frame includes an integral rectangular support outer frame, in which a plurality of support rods arranged horizontally and vertically are welded and connected. Some of the support rods are also provided with a connecting portion, which includes two connecting plates and a connecting column connected between the two connecting plates. The connecting plate has a groove, which is clamped on the support rod and welded fixed. The connecting column is designed to be through and can pass through bolts; the connecting portion is used to detachably connect the rear wheel connecting seat and the generator through a plurality of bolts.

[0014] In some embodiments, the steering assembly also includes a steering wheel reduction gearbox, a steering linkage rod, a vehicle longitudinal steering push-pull rod, an L-shaped steering reversing arm, a vehicle transverse steering push-pull rod, and two steering knuckles; the steering column together with the steering wheel reduction gearbox is rotatably mounted on the front extension part of the integral frame through a connecting seat, the lower end output shaft of the steering wheel reduction gearbox is connected to the steering linkage rod, and the two ends of the vehicle longitudinal steering push-pull rod are respectively connected to the steering linkage rod and one of the connecting arms of the L-shaped steering reversing arm through a ball head structure, and the two ends of the vehicle transverse steering push-pull rod are respectively connected to the other connecting arm of the L-shaped steering reversing arm and the front connection of the steering pull rod on the steering knuckle through a ball head, and the left and right steering wheel connecting push-pull rods are also connected between the two steering knuckles to enable the two front wheels to steer synchronously.

[0015] In some embodiments, the integral frame also includes a battery box and a spare tire bracket. The rear portion of the battery box has an accessory mounting position, which can be optionally used to detachably install a trailer bucket or a rotary tillage and furrowing plow combination; the accessory mounting position at the lower portion of the integral frame is used for detachably connecting and installing a lawn mower; the accessory mounting position at the upper portion of the loading support portion is used for detachably installing a folding arm pesticide spraying device; the accessory mounting position at the front portion of the front extension portion of the integral frame is used for detachably installing a snowplow.

[0016] In some embodiments, the generator, the first motor, and the second motor are replaced by an engine fixed to the integral frame and a rear drive axle fixed to the integral frame. The engine is connected to the rear drive axle through a chain and transmits power to the left rear wheel and the right rear wheel respectively through a differential.

[0017] In some embodiments, the engine drives the rear axle sprocket through a chain output, and the rear axle sprocket is fixed on the differential housing, and the left half-shaft and the right half-shaft respectively extend into the transmission splines of the half-shaft gears in the differential; wherein, the differential housing is provided with a first tooth-type meshing tooth, and the left half-shaft has a differential lock sliding sleeve that can slide along its axial direction, and the differential lock sliding sleeve is driven to slide by a push-pull arm; the other end of the push-pull arm extends to the front extension part of the integral frame of the integral frame through a pull rope, and is controlled by an operating mechanism; the push-pull arm is also equipped with a reset spring that drives it to return to its position.

[0018] The present application has the following beneficial effects: First, it utilizes a monolithic frame comprising a seat support, a load support, and a monolithic front extension, the monolithic front extension being mounted forward of the seat support. Unlike conventional through-the-frame designs, the monolithic frame of the present application primarily features streamlined weight reduction and longitudinal detachability, simplifying the suspension system by integrating it into the monolithic frame. By combining the monolithic frame with various drive systems, the conventional front axle and suspension system are eliminated, significantly reducing vehicle weight and simplifying the vehicle structure. This significantly expands the vehicle's functionality while reducing structural and weight redundancy in the vehicle's travel system. By removing the monolithic front extension and carport, and folding the seat backrests, the space required for vehicle transfers and transportation is significantly reduced, providing significant space convenience for temporary delivery and even airdrops required for specialized applications such as border patrols, emergency rescue, and field construction.

[0019] Secondly, in one embodiment, dual motors independently drive the rear wheels, complemented by a generator to supplement the battery pack's power source. This extends the vehicle's battery life and allows it to be used as a mobile energy source to adapt to different working conditions. Specifically, the vehicle's onboard generator provides power for outdoor use of power tools, such as electric water pumps, welders, and electric winches. Furthermore, the independently driven rear wheels can rotate in opposite directions to achieve on-the-spot turns or small-radius turns.

[0020] Third, by setting up accessory installation positions in multiple locations, users can quickly replace lawn mowers, rotary tillage plow combinations, snowplows, folding-arm pesticide sprayers and other equipment according to actual needs, achieving multiple uses of one vehicle and improving equipment utilization. The design of multiple accessory installation positions supports the access of different operating equipment, improving the product's compatibility with usage scenarios and functional scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the final assembly structure of this application.

[0023] Figure 2 This is a schematic diagram of the assembly structure from another angle of this application.

[0024] Figure 3 It is a schematic diagram of the bottom structure of this application.

[0025] Figure 4 It is a schematic diagram of the steering assembly structure of this application.

[0026] Figure 5 It is a structural schematic diagram of another embodiment of the steering assembly of the present application.

[0027] Figure 6 It is a structural schematic diagram of the integral frame of the present application.

[0028] Figure 7 This is one of the extended uses of this application.

[0029] Figure 8 This is one of the extended uses of this application.

[0030] Figure 9 This is one of the extended uses of this application.

[0031] Figure 10 This is one of the extended uses of this application.

[0032] Figure 11 This is one of the extended uses of this application.

[0033] Figure 12 This is one of the extended uses of this application.

[0034] Figure 13 It is a structural diagram of another power system installed in this application.

[0035] Reference numerals: 100. Integral frame, 110. Seat support, 120. Loading support, 130. Rectangular support frame, 140. Support rod, 150. Connecting part, 160. Battery box, 200. Integral frame front extension, 300. Seat, 310. Cushion, 320. Backrest, 400. Rear wheel assembly, 410. Left rear wheel, 420. Right rear wheel, 430. Rear wheel connecting seat, 440. Transverse reinforcement rod, 500. Front wheel assembly, 520. Steering knuckle, 600. Steering assembly, 610. Steering column, 620. Steering wheel, 630. Steering gear housing, 640. Movable rack, 650. Steering rod, 660. Support rod, 661. Casing, 662. Socket pipe, 710. First motor, 720. Second motor, 730. Generator, 710A. Engine, 720A. Rear drive axle, 721A. Chain, 722A. Rear axle sprocket, 730A. Differential, 731A. Differential housing, 732A. First tooth meshing gear, 741A. Left half-shaft, 742A. Right half-shaft, 750A. Differential lock sliding sleeve, 751A. Second tooth meshing gear, 760A. Push-pull arm, 761A. Deep groove ball bearing, 770A. Return spring, 820. Fuel tank, 830. Accessory mounting position, 910. Trailer bucket, 920. Rotary tillage and furrowing plow combination, 930. Lawn mower, 940. Folding-arm pesticide sprayer, 950. Snowplow. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection of this application.

[0037] refer to Figures 1 to 6 This embodiment provides a multi-purpose tool cart, comprising: The integral frame 100 is an integral frame structure formed by welding rectangular tubes, and the integral frame 100 includes a seat support portion 110 and a loading support portion 120; The integral frame front extension 200 is mounted at the front end of the seat support 110 and is used to carry the steering assembly 600 and also serves as a footrest for the driver and passenger; a seat, mounted on the seat support portion 110; The rear wheel assembly 400 includes a left rear wheel 410 and a right rear wheel 420, each rotatably mounted on a rear wheel connecting seat 430; The front wheel assembly 500, including two front wheels, is directly mounted below the seat support portion 110 of the integral vehicle frame 100, thereby omitting the independent front axle system of a conventional vehicle to reduce overall weight and structural redundancy; The steering assembly 600 is mounted on the front extension portion 200 of the integral frame and connected to the front wheel assembly 500 to control the steering of the front wheel assembly 500; Additionally, it includes: The drive assembly includes a first motor 710, a second motor 720, and a generator 730; the generator 730 is used to replenish the battery pack; the battery pack is used to store energy and provide power to the first motor 710, the second motor 720, and external / attached accessories; Fuel tank 820 , providing fuel supply to generator 730 ; The first motor 710 and the second motor 720 are respectively mounted on the rear wheel connecting seat 430 at the corresponding positions of the left rear wheel 410 and the right rear wheel 420, and provide the left rear wheel 410 and the right rear wheel 420 with the ability to drive in the same direction and the ability to drive in different directions through the transmission control mechanism; thereby, the independently driven rear wheels can move in opposite directions to achieve on-the-spot turning or small-radius turning; since the front and rear suspensions of the integral frame itself omit the spring shock absorption system, the vehicle is prone to a situation where a single wheel leaves the ground. Since the two independent first motors and second motors can drive one side of the wheel independently, when a single rear wheel is suspended or slipping, the other rear wheel continues to provide driving force for the entire vehicle, solving the problem of ordinary traditional rear-wheel drive vehicles losing all driving force when one side of the wheel is suspended.

[0038] Accessory mounting positions 830 are configured at one or more of the following locations: the lower part of the integral frame 100, the rear part of the integral frame 100, the upper part of the loading support part 120, and the front part of the integral frame front extension part 200. These accessory mounting positions 830 are optionally configured with mechanical connection interfaces and electrical connection interfaces to facilitate mechanical connection installation and circuit connection for external / attached accessories with different functions and structures.

[0039] A carport is also provided on the integral frame 100. The front end of the carport is connected to the front extension portion 200 of the integral frame, and the rear end of the carport is connected to the area between the seat support portion 110 and the loading support portion 120 on the integral frame 100. The carport is detachably connected to the integral frame 100 by a plurality of fasteners.

[0040] Furthermore, to facilitate container transportation, according to the traditional container internal cargo space dimensions of 2.69m in height, 2.34m in width, and 12m in length, the storage dimensions of the integrated frame front extension 200, tires, and carport of the present application after removal are 2.31m in length, 1.14m in width, and 0.64m in height. This maximizes container space utilization when the vehicle is stored, whether arranged horizontally or vertically, and minimizes the outer dimensions when transported by air.

[0041] Some preferred / improved embodiments based on the above embodiments will be described below. Any one of the following embodiments may be selected, or multiple embodiments may be selected and combined.

[0042] In some embodiments, the steering assembly 600 includes a steering column 610 that is capable of deflecting. The seat 300 includes a seat cushion 310 and a backrest 320. The backrest 320 is rotatably connected to the seat cushion 310 via a rotation axis and can be locked, allowing the backrest 320 to rotate relative to the seat cushion 310 to be straight, so that the backrest, when flattened, is lower than the guardrail of the integral frame 100. This reduces the height of the vehicle when it is stowed, thereby reducing the overall height during transportation. The rotation and locking of the backrest 320 are preferably achieved by using a latch that engages a fixed hole.

[0043] To facilitate entry and exit, the lower end of the steering column 610 is positioned in the middle of the front extension 200 of the integral frame, as viewed from the front of the utility vehicle. The upper end of the steering column 610 is tilted toward the driver's seat. Since the steering gear of the steering assembly is positioned from the center of the vehicle, entry and exit are facilitated.

[0044] As one of the preferred embodiments, the steering assembly 600 further includes a steering gear housing 630, a movable rack 640, and a steering rod 650. Both ends of the steering gear housing 630 are rotatably mounted on the front extension portion 200 of the integral vehicle frame via bearings and / or rotating sleeves. The internal rotating shaft of the steering column 610 extends into the steering gear housing 630 and engages with the movable rack 640. One end of the movable rack 640 is hinged to the steering rod 650, and the other end of the steering rod 650 is hinged to the steering knuckle 520 of one of the front wheels. Linear bearings are mounted at both ends of the steering gear housing 630, and the movable rack 640 moves within the linear bearings. A support rod 660 is also sleeved on the rotating column, and the other end of the support rod 660 is hinged to the area between the two seats on the integral frame 100. The support rod 660 includes a sleeve 661 and a socket pipe 662. The depth of the socket pipe 662 inserted into the sleeve 661 can be adjusted and locked to achieve length adjustment of the support rod 660. In this embodiment, the locking of the sleeve 661 and the socket pipe 662 can be fixed by a clamping type.

[0045] After the length of the support rod 660 is adjusted, the rotating column can rotate together with the steering gear housing 630 around the axis of the movable rack, so that the upper end of the steering column 610 moves to the front of the tool vehicle, so that the user can operate the vehicle steering on the ground.

[0046] Reference Figure 5 As shown, another embodiment of the steering assembly is provided to replace the above structure: the steering assembly also includes a steering wheel reduction gearbox 620A, a steering linkage rod 630A, a vehicle longitudinal steering push-pull rod 640A, an L-shaped steering reversing arm 650A, a vehicle transverse steering push-pull rod 660A, and two steering knuckles 680A; the steering column 610A and the steering wheel reduction gearbox 620A are rotatably mounted on the integral frame front extension 200 through a connecting seat, and the lower end of the steering wheel reduction gearbox 620A is The output shaft at the end is connected to the steering linkage rod 630A. The two ends of the vehicle's longitudinal steering push-pull rod 640A are connected to the steering linkage rod 630A and one connecting arm of the L-shaped steering reversing arm 650A via ball joints. The two ends of the vehicle's transverse steering push-pull rod 660A are connected to the other connecting arm of the L-shaped steering reversing arm 650A and the front connection 670A of the steering tie rod on the steering knuckle 680A via ball joints. Left and right steering wheel connecting push-pull rods 690A are also connected between the two steering knuckles to ensure synchronous steering of the two front wheels. Furthermore, the steering column 610A and the steering wheel reduction gearbox 620A are capable of rotating about an axis S1 parallel to the wheel axle.

[0047] Regarding the specific installation of the rear wheel assembly 400: The rear wheel connector 430 includes a connector for the left rear wheel 410 and a connector for the right rear wheel 420, with a transverse reinforcement rod 440 connected between them. The rear wheel axle extends into the rear wheel connector 430 and is connected to the output shaft of the first motor 710 / second motor 720 via a gearbox or sprocket. Furthermore, the rear wheel assembly 400 is equipped with a parking brake system, which can be referenced to technical solutions in the art.

[0048] Reference Figure 6 As shown, this is a further development of the monocoque frame: Unlike traditional front-to-back through-frame designs, the monocoque frame of this application primarily features streamlined weight reduction and longitudinal detachability, simplifying the suspension system and integrating it into the monocoque. By combining the monocoque frame with different drive systems, the traditional front axle and suspension system are eliminated, significantly reducing vehicle weight and simplifying the vehicle structure. This significantly expands the vehicle's functionality while reducing structural and weight redundancy in the vehicle's driving system.

[0049] Specifically, the integral frame 100 includes a monolithic rectangular support outer frame 130, within which are welded a plurality of support rods 140 arranged horizontally and vertically. Some of the support rods 140 are further provided with a connecting portion 150. The connecting portion 150 includes two connecting plates and a connecting column connected between the two connecting plates. The connecting plates have grooves that are clamped onto the support rods 140 and welded in place. The connecting column is designed to be through-hole and can be passed through with fixing bolts. In this embodiment, the connecting portion 150 is used to detachably connect the rear wheel connector 430 and the generator 730 via a plurality of bolts. This also allows the electric drive system in the aforementioned embodiment to be disassembled and converted to a fuel drive system.

[0050] The integral frame 100 further includes a battery box 160 , which is disposed at the rear of the integral frame 100 . The battery box 160 is used to install a battery pack and also provides a set of accessory mounting locations.

[0051] like Figure 8 and Figure 9 As shown, as one of the expanded uses, the accessory mounting position 830 at the rear of the integral frame 100 can be selectively used to detachably mount a trailer bucket 910 or a rotary tillage plow combination 920, and other agricultural implements.

[0052] like Figure 10 As shown, as one of the expanded uses, the accessory mounting position 830 at the lower portion of the integral frame 100 is used for detachably connecting and mounting a lawn mower 930 .

[0053] like Figure 11 and Figure 12 As shown, as one of the expanded usage modes, the accessory mounting position 830 on the upper portion of the loading support portion 120 is used for detachably mounting a folding arm pesticide spraying device 940 .

[0054] like Figure 7 and Figure 11 As shown, as one of the expanded uses, the accessory mounting position 830 at the front of the integral frame front extension 200 is used to detachably mount a snowplow 950 .

[0055] Reference Figure 13 As shown, based on the above embodiment, this application also provides an alternative method of using a fuel engine. Specifically, the generator 730, the first motor 710, the second motor 720, etc. in the above embodiment are replaced by an engine fixed to the integral frame and a rear drive axle fixed to the integral frame.

[0056] The engine 710A drives a rear axle sprocket 722A via a chain 721A. The rear axle sprocket 722A is fixed to a differential case 731A (e.g., by bolt fastening). The left half-shaft 741A and the right half-shaft 742A respectively extend into the drive splines of the half-shaft gears in the differential 730A. The differential housing 731A is equipped with a first toothed meshing tooth 732A. The left axle shaft 741A is provided with a differential lock sliding sleeve 750A that can slide axially along the axle shaft. This differential lock sliding sleeve 750A is driven to slide by a push-pull arm 760A. The differential lock sliding sleeve 750A is splined to the left axle shaft 741A, restricting it to axial sliding only on the left axle shaft 741A. In other words, the differential lock sliding sleeve 750A rotates synchronously with the left axle shaft 750A under all circumstances.

[0057] Specifically, the differential lock sliding sleeve 750A is provided with a second tooth-type meshing tooth 751A that can engage with the first tooth-type meshing tooth 732A. The outer ring of the differential lock sliding sleeve 750A has a convex ring. A deep groove ball bearing 761A is fixed to the end of the push-pull arm 760A. The outer ring of the deep groove ball bearing 761A has a groove that cooperates with the convex ring, thereby realizing synchronous axial movement of the deep groove ball bearing 761A and the differential lock sliding sleeve 750A. In this way, the left half shaft 741A and the differential case 731A can be connected or separated through the push-pull arm 760A for use in different working conditions, such as off-road obstacle driving and general driving.

[0058] In addition, the other end of the push-pull arm 760A is extended to the front extension portion 200 of the integral frame 100 via a pull rope and is controlled by an operating mechanism. At the same time, the push-pull arm 760A is also equipped with a return spring 770A to drive it back to its original position.

[0059] In the above embodiment, the engine 710A fixed to the integral frame 100 and the rear drive axle 720A fixed to the integral frame 100 realize modular power system replacement through multiple connecting parts 150 on the integral frame 100.

[0060] Furthermore, the engine 710A is preferably installed on the right side of the vehicle, diagonally across from the driver's seat. This balances the vehicle's overall weight distribution and positions the chain drive differential system inboard of the right rear wheel, eliminating the differential protrusion found in the center of the rear axle on conventional vehicles and improving off-road obstacle handling. Protective plates are also installed at the front and rear of the differential to prevent collision damage to the differential assembly during off-road navigating.

[0061] Thus far, various embodiments of the present application have been described in detail. To avoid obscuring the concept of the present application, some details well known in the art have not been described. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions disclosed herein.

[0062] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A multi-purpose tool vehicle, characterized in that: include: An integral frame, the integral frame comprising a seat support portion, a loading support portion, and an integral frame front extension portion, the integral frame front extension portion being mounted at a front end of the seat support portion; a seat, mounted on the seat support; The rear wheel assembly includes a left rear wheel and a right rear wheel, each of which is rotatably mounted on a rear wheel connecting seat; The front wheel assembly, including two front wheels, is mounted directly below the seat support portion of the integral frame; A steering assembly is mounted on the front extension of the integral frame and connected to the front wheel set to control the steering of the front wheel set; A drive assembly, the drive assembly comprising a first motor, a second motor, and a battery pack, the battery pack being used to store energy and provide power to the first motor, the second motor, and external / attached accessories; A generator for providing electrical energy to the battery pack; Fuel tank, which provides fuel supply to the generator; The front and rear wheel groups both use low-pressure tires to achieve good tire grip while also achieving a shock-absorbing effect through tire deformation; The first motor and the second motor are respectively mounted on the rear wheel connecting seats at the corresponding positions of the left rear wheel and the right rear wheel, and provide the left rear wheel and the right rear wheel with the ability to drive in the same direction and the ability to drive in different directions through the transmission control mechanism; thereby, the independently driven rear wheels can move in opposite directions to achieve in-situ turning or small radius turning; One or more of the following positions are provided with an accessory mounting position: a lower portion of the integral frame, a rear portion of the integral frame, an upper portion of the loading support portion, and a front portion of the front extension portion of the integral frame.

2. A multi-purpose tool vehicle according to claim 1, characterized in that: The steering assembly includes a steering column that can be deflected; the seat includes a seat cushion and a backrest that can be rotated to be straight relative to the seat cushion; thereby achieving a reduction in the overall height of the vehicle when not in use.

3. A multi-purpose tool vehicle according to claim 2, characterized in that: In the front projection of the tool vehicle, the lower end of the steering column is arranged in the middle area of the front extension of the integral frame, and the upper end of the steering column is inclined toward the main driver's seat therein.

4. A multi-purpose tool vehicle according to claim 2, characterized in that: The steering assembly further includes a steering gear housing, a movable rack, and a steering tie rod. Both ends of the steering gear housing are rotatably mounted on the front extension of the integral frame via bearings and / or rotating sleeves. The steering column extends into the steering gear housing and engages with the movable rack. One end of the movable rack is hinged to the steering tie rod, and the other end of the steering tie rod is hinged to the steering knuckle of one of the front wheels. A support rod is also sleeved on the rotating column, and the other end of the support rod is hinged to the area between the two seats on the integral frame. The support rod includes a sleeve and a socket. The depth of the socket inserted into the sleeve can be adjusted and locked to achieve length adjustment of the support rod. After the length of the support rod is adjusted, the rotating column can rotate together with the steering gear housing around the extension axis of the movable rack, so that the upper end of the steering column is offset to the front of the tool vehicle, so that the user can operate the steering wheel on the ground.

5. The multi-purpose tool vehicle according to claim 1, characterized in that: The rear wheel connecting seat includes a left rear wheel connecting seat and a right rear wheel connecting seat, a transverse reinforcement rod is connected between the two, and the rear wheel axle of the rear wheel extends into the rear wheel connecting seat and is connected to the output shaft of the first motor / second motor through a gear box or a sprocket.

6. The multi-purpose tool vehicle according to claim 1, characterized in that: The integral frame includes an integral rectangular support outer frame, in which a plurality of support rods arranged horizontally and vertically are welded and connected. Some of the support rods are also provided with a connecting portion, which includes two connecting plates and a connecting column connected between the two connecting plates. The connecting plate has a groove, which is clamped on the support rod and welded fixed. The connecting column is designed to be through and can pass through bolts. The connecting portion is used to detachably connect the rear wheel connecting seat and the generator through a plurality of bolts.

7. The multi-purpose tool vehicle according to claim 2, characterized in that: The steering assembly also includes a steering wheel reduction gearbox, a steering linkage rod, a vehicle longitudinal steering push-pull rod, an L-shaped steering reversing arm, a vehicle transverse steering push-pull rod, and two steering knuckles; the steering column together with the steering wheel reduction gearbox is rotatably mounted on the front extension of the integral frame through a connecting seat, the lower end output shaft of the steering wheel reduction gearbox is connected to the steering linkage rod, the two ends of the vehicle longitudinal steering push-pull rod are respectively connected to the steering linkage rod and one of the connecting arms of the L-shaped steering reversing arm through a ball head structure, the two ends of the vehicle transverse steering push-pull rod are respectively connected to the other connecting arm of the L-shaped steering reversing arm and the front connection of the steering pull rod on the steering knuckle through a ball head, and the left and right steering wheel connecting push-pull rods are also connected between the two steering knuckles to enable the two front wheels to steer synchronously.

8. The multi-purpose tool vehicle according to claim 1, characterized in that: The integral frame also includes a battery box and a spare tire bracket. The rear part of the battery box has an accessory mounting position, which can be selectively used to detachably install a trailer bucket or a rotary tillage and furrowing plow combination; the accessory mounting position at the lower part of the integral frame is used for detachably connecting and installing a lawn mower; the accessory mounting position at the upper part of the loading support part is used for detachably installing a folding arm pesticide spraying device; the accessory mounting position at the front part of the front extension part of the integral frame is used for detachably installing a snowplow.

9. A multi-purpose tool vehicle according to any one of claims 1 to 8, characterized in that: The generator, the first motor and the second motor are replaced by an engine fixed to the integral frame and a rear drive axle fixed to the integral frame. The engine is connected to the rear drive axle through a chain and transmits power to the left rear wheel and the right rear wheel respectively through a differential.

10. The multi-purpose tool vehicle according to claim 9, characterized in that: The engine drives the rear axle sprocket through the chain output, and the rear axle sprocket is fixed on the differential housing, and the left half-shaft and the right half-shaft respectively extend into the transmission splines of the half-shaft gears in the differential; wherein, the differential housing is provided with a first tooth-type meshing tooth, and the left half-shaft is provided with a differential lock sliding sleeve that can slide along its axial direction, and the differential lock sliding sleeve is driven to slide by a push-pull arm; the other end of the push-pull arm extends to the front extension part of the integral frame of the integral frame through a pull rope, and is controlled by an operating mechanism; the push-pull arm is also equipped with a reset spring that drives it to return to its position.

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