Remote control four-wheel all terrain axle transmission case

Abstract

The present application relates to the technical field of gearbox, and discloses a remote control four-wheel all-terrain transmission shaft gearbox, which comprises a gearbox body, an input shaft and an output shaft, the input shaft and the output shaft are both rotationally connected to the gearbox body, the input shaft is connected with a driving module, the output shaft is fixedly connected with an output gear, the output gear is engaged with two groups of transmission gears connected with transmission shafts, the lower end of the transmission shaft is transmissionally connected with a wheel, and the output gear rotates to drive the two groups of transmission shafts to rotate the wheel; the present application realizes automatic balance of two-side torque distribution, eliminates the risk of gear damage caused by unbalanced load of traditional all-terrain vehicles, realizes all-terrain adaptive power distribution without mechanical differential, greatly improves the driving performance of the vehicle, and greatly improves the ground clearance of the chassis through the design of the transmission shaft, effectively avoiding collision damage of the components at the bottom of the chassis.

Description

Technical Field

[0001] This invention relates to the field of gearbox technology, specifically a remote-controlled four-wheel all-terrain driveshaft gearbox. Background Technology

[0002] All-terrain transport vehicles, as multi-functional transport equipment adapted to complex terrain environments, have significant application value in agriculture, forestry, disaster relief, and field exploration. Their design must balance terrain adaptability, load capacity, and power efficiency. Traditional transport equipment struggles to achieve stable and efficient transport on rugged roads or soft ground. Existing all-terrain transport vehicles are typically equipped with wide off-road tires or tracks, easily traversing muddy field ridges, steep slopes, slippery orchards, and other areas inaccessible to traditional agricultural machinery. Through remote control operation, they can conveniently transport fertilizers, seeds, pesticides, harvested crops, or agricultural implements, significantly reducing the burden on manual labor and improving operational efficiency. Their advantages are particularly pronounced in scenarios such as slopes, greenhouses, and orchards, making them crucial equipment for enhancing the intelligence and safety of modern agricultural logistics.

[0003] However, existing all-terrain transport vehicles face significant technical bottlenecks when dealing with complex terrains such as rugged mountains, slippery mud, exposed rocks, or steep slopes and gullies. While traditional mechanical differential structures can achieve basic differential functions, when one drive wheel is completely suspended in the air or stuck in low-traction media (such as deep mud, sand pits, or ice), the inherent torque distribution characteristics of open differentials cause power to be completely transferred to the spinning wheel, resulting in zero effective driving force. The vehicle instantly loses its ability to move, forcing the operation to stop and severely impacting transport efficiency. This is especially true in high-frequency operation scenarios such as orchard terrace transport, forestry material transfer, and field survey transport, where the cumulative downtime caused by power escape significantly reduces equipment efficiency. Furthermore, to balance load stability and cost control, most existing transport vehicles have limited ground clearance. When traversing raised tree roots, intersecting rocks, unpaved field ridges, or deep ruts after rain, critical components such as chassis longitudinal beams, drive shaft guards, and hydraulic lines are prone to rigid scraping or even violent impacts with the uneven terrain. This abnormal impact not only accelerates the deformation of the vehicle frame and damages the sealing of the power transmission components, but also causes the goods being transported on the vehicle to break and spill due to the violent bumps. Summary of the Invention

[0004] (a) Technical problem to be solved: In view of the shortcomings of the existing technology, the present invention provides a remote-controlled four-wheel all-terrain transmission gearbox, which has the advantages of long ground clearance of the vehicle chassis and adaptive power distribution, and solves the problems of power interruption when one side is suspended and frequent chassis collisions.

[0005] (II) Technical Solution: To achieve the above-mentioned purpose of high ground clearance and adaptive power distribution of the vehicle chassis, the present invention provides the following technical solution: a remote-controlled four-wheel all-terrain transmission gearbox, including a gearbox body, an input shaft, and an output shaft. The input shaft and the output shaft are rotatably connected to the gearbox body. The input shaft is connected to a drive module. The output shaft is fixedly connected to an output gear. The output gear meshes with two sets of transmission gears connected to transmission shafts. The lower end of the transmission shaft is connected to a wheel. When the output gear rotates, it simultaneously drives the two sets of transmission shafts to make the wheel rotate.

[0006] Preferably, one end of the transmission shaft is fixedly connected to the transmission gear, and the other end of the transmission shaft is fixedly connected to the drive gear. The drive gear is connected to the wheel. The transmission gear, drive gear, and output gear are all bevel gears. The two sets of transmission shafts are inclined to each other, with an included angle greater than 90° between them. The included angle between the axis of the transmission shaft and the axis of the output shaft is less than 90°. The two sets of transmission shafts are symmetrically arranged along the axis of the output shaft.

[0007] Preferably, a transmission box is fixedly installed at the bottom of the gearbox body. The transmission box has symmetrical shaft holes at both ends. The transmission shaft is rotatably installed coaxially with the shaft holes. A foot housing is also coaxially installed on the transmission shaft. Both ends of the transmission shaft are rotatably connected to the foot housing. One end of the foot housing is fixedly connected to the transmission box, and the other end of the foot housing is rotatably connected to the axle of the wheel.

[0008] Preferably, a bearing is coaxially connected between the machine foot housing and the drive shaft, and a bearing is connected between the machine foot housing and the wheel axle.

[0009] Preferably, an equipment box is also provided above the transmission box, the gearbox body is fixedly connected to the equipment box, the drive module is fixedly installed in the equipment box, and the drive module is a motor. A power supply is provided in the equipment box, and the power supply is electrically connected to the drive module.

[0010] Preferably, a radially expandable conical elastic meshing gear is coaxially rotatably connected below the output gear. The elastic meshing gear is an idler gear, and the elastic meshing gear meshes with two sets of transmission gears simultaneously. The axes of the elastic meshing gear, the output gear, and the two sets of transmission gears are connected to form a trapezoidal shape. The elastic meshing gear forms a continuous pressing force on the meshing surface of the transmission gears through its radial elastic expansion.

[0011] Preferably, the elastic meshing gear includes a telescopic shaft, a radial elastic structure, and arc-shaped tooth segments. The telescopic shaft is internally provided with a spring that provides axial elastic support. One end of the telescopic shaft is rotatably connected to the output gear on the same axis. The other end of the telescopic shaft is coaxially fixedly mounted with the radial elastic structure. Four or more arc-shaped tooth segments are distributed at equal angles along the circumference of the radial elastic structure. The arc-shaped tooth segments can be radially and synchronously displaced with the radial elastic structure. During the displacement, the arc-shaped tooth segments maintain the meshing state with the transmission gear and form a continuous pressing force on the tooth surface of the transmission gear.

[0012] Preferably, the arc-shaped tooth segment is an integrated flexible tooth ring, consisting of a rigid matrix and a flexible surface layer. The flexible layer decreases in size along the direction from the tooth root to the tooth tip. The radial elastic structure employs a multi-chamber hydraulic bladder, with the chambers connected by damping micropores. The radial elastic structure generates radial support force on four or more circumferentially distributed arc-shaped tooth segments. The bottom of the radial elastic structure is connected to an indicator disk that responds to the deformation of the radial elastic structure via a connecting pipe. The compressed state of the radial elastic structure corresponds to a high position display on the indicator disk, and the expanded state of the radial elastic structure corresponds to a low position display on the indicator disk.

[0013] Preferably, the indicator disc is fixedly mounted on the transmission box, and both the upper and lower ends of the radial elastic structure are provided with radial telescopic support frames to enhance the structural stability of the radial elastic structure.

[0014] Preferably, a frame is also fixedly connected to the side end face of the transmission box, the transmission box is fixedly installed on both sides of the frame, and a truss is fixedly installed at the bottom of the frame, with both ends of the truss fixedly connected to the machine foot housing.

[0015] (III) Beneficial Effects: Compared with the prior art, the present invention provides a remote-controlled four-wheel all-terrain driveshaft gearbox, which has the following beneficial effects: 1. The remote-controlled four-wheel all-terrain driveshaft gearbox, through the cooperation of the gearbox body structure and the driveshaft structure, realizes automatic balance of torque distribution on both sides, eliminating the risk of gear damage caused by uneven load in traditional all-terrain vehicles. At the same time, it can realize all-terrain adaptive power distribution without the need for a mechanical differential, greatly improving the vehicle's driving performance. Meanwhile, the inclined design of the driveshaft greatly increases the space at the bottom of the frame, and the bottom of the frame does not need to reserve a complete horizontal space for the parallel shaft system, which greatly increases the ground clearance of the chassis, effectively avoiding collision damage between chassis components and obstacles in rugged terrain, and greatly reducing the probability of the transmission box being bumped. In addition, this lateral symmetrical drive mode can significantly enhance the anti-roll stability of the vehicle under the condition of crossing slopes, thereby solving the problem of power interruption caused by the suspension of one wheel.

[0016] 2. This remote-controlled four-wheel all-terrain driveshaft gearbox, through the combined use of a transmission gear structure and an elastic meshing gear structure, maintains dynamic coordination between the axial preload and radial holding force of the elastic meshing gear. This allows the transmission gear and output gear in the structure of this invention to maintain optimal meshing under load fluctuations, effectively solving the misalignment caused by the tilting design between the transmission gear and output gear. When the transmission gear and output gear misalign, a visual warning of axis misalignment can be achieved through the indicator disc structure, greatly reducing the technical threshold and maintenance cost of all-terrain vehicle field maintenance. It effectively ensures that maintenance intervention is triggered before irreversible wear occurs on the tooth surfaces of the output gear and transmission gear, avoiding chain damage to the transmission system. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the remote-controlled four-wheel all-terrain drive shaft gearbox in this invention.

[0018] Figure 2 This is a front view of the structure of the remote-controlled four-wheel all-terrain transmission gearbox in this invention.

[0019] Figure 3 This is a top view of the structure of the remote-controlled four-wheel all-terrain transmission gearbox in this invention.

[0020] Figure 4 This is a three-dimensional schematic diagram of the wheel structure of the remote-controlled four-wheel all-terrain drive shaft gearbox in this invention.

[0021] Figure 5 This is a cross-sectional view of the housing and transmission box structure of the remote-controlled four-wheel all-terrain drive shaft gearbox in this invention.

[0022] Figure 6 for Figure 5 Enlarged view of a portion of the structure of the transmission box (Type A).

[0023] Figure 7 This is a schematic diagram of the three-dimensional structure in Example 2.

[0024] Figure 8 This is a three-dimensional schematic diagram of the elastic meshing gear structure in Example 2.

[0025] Figure 9 This is a cross-sectional view of the elastic meshing gear structure in Example 2.

[0026] Figure 10 This is a schematic diagram of the arc-shaped tooth segment structure installed at equal angles along the radial elastic structure circumferentially in Example 2.

[0027] In the diagram: 1. Gearbox body; 11. Output shaft; 111. Output gear; 2. Wheel; 3. Drive shaft; 31. Drive gear; 32. Drive gear; 4. Transmission box; 41. Indicator panel; 5. Equipment box; 51. Drive module; 52. Power supply; 6. Machine base housing; 7. Elastic meshing gear; 71. Telescopic shaft; 72. Radial elastic structure; 73. Arc-shaped tooth segment; 8. Frame; 9. Truss. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1: Please refer to Figures 1-6 The remote-controlled four-wheel all-terrain driveshaft gearbox includes a gearbox body 1, an input shaft, and an output shaft 11. Both the input and output shafts 11 are rotatably connected to the gearbox body 1. A drive module 51 is connected to the input shaft, and an output gear 111 is fixedly connected to the output shaft 11. The output gear 111 meshes with two sets of transmission gears 31 connected to a drive shaft 3. Wheels 2 are connected to the lower end of the drive shaft 3. When the output gear 111 rotates, it simultaneously drives the two sets of drive shafts 3, causing the wheels 2 to rotate. This structure, through the direct mechanical connection between the output gear 111 and the two transmission gears 31, forms a power distribution mechanism that completely avoids the power escape defects of traditional differentials. When one wheel 2 encounters low traction or suspension, the other transmission gear 31 can still obtain full torque output through rigid engagement, fundamentally solving the power interruption problem of all-terrain vehicles in complex road conditions.

[0030] Please see Figures 1-6 One end of the drive shaft 3 is fixedly connected to the drive gear 31, and the other end is fixedly connected to the drive gear 32. The drive gear 32 is connected to the wheel 2. The drive gear 31, drive gear 32, and output gear 111 are all bevel gears. The two sets of drive shafts 3 are inclined, with the included angle between the two sets of drive shafts 3 being greater than 90°. The included angle between the axis of the drive shaft 3 and the axis of the output shaft 11 is less than 90°. The use of bevel gears adapts to the axial force transmission requirements of the inclined drive shaft 3, and their helical tooth shape naturally counteracts the lateral force caused by the inclination of the drive shaft 3. Furthermore, the inverted V-shaped included angle of the drive shaft 3 (greater than 90°) forms a self-balancing force arm structure. When the resistance increases, the side force arm automatically shortens, improving torque efficiency; when the resistance decreases, the side force arm lengthens, reducing efficiency, thus achieving dynamic torque distribution.

[0031] Specifically, when one wheel 2 encounters significant resistance, the reaction force exerted by the transmission gear 31 on that side on the output gear 111 increases. Since the transmission shaft 3 and the output shaft 11 are at an acute angle, the effective component of this increased reaction force in the rotational direction of the output shaft 11 increases. This leads to an increase in the actual effective driving torque obtained by the transmission system on that side from the output shaft 11. Simultaneously, the reaction force exerted by the transmission gear 31 on the other side on the output gear 111 decreases. The effective component of this reaction force in the rotational direction of the output shaft 11 decreases. This leads to a decrease in the actual effective driving torque obtained by the transmission shaft 3 on that side from the output shaft 11. This allows the output shaft 11 to distribute more torque to the high-resistance side and reduce the torque flowing to the low-resistance side. This achieves the effect of a differential lock, preventing power from being completely wasted on the low-traction wheel 2 and improving off-road capability. The acute angle design of less than 90° between the transmission shaft 3 and the output shaft 11 compresses longitudinal space, freeing up crucial ground clearance for the chassis; and the two sets of transmission shafts 3 are symmetrically arranged along the axis of the output shaft 11. The symmetrical geometric layout ensures that the vehicle's center of gravity falls on the longitudinal axis, minimizing the difference in ground pressure between the left and right wheels when traversing slopes, thus guaranteeing the vehicle's lateral stability on steep slopes and preventing power distribution imbalance caused by one side being suspended. A transmission housing 4 is fixedly mounted at the bottom of the gearbox body 1. The transmission housing 4 has symmetrical shaft holes at both ends, and the drive shaft 3 is coaxially and rotatably mounted with these holes. Part of the structure integrates the meshing point of the transmission gear 31, the bearing support point, and the output point of the wheel 2 into a mechanically closed system, effectively suppressing radial vibrations caused by tilting transmission and extending bearing life. A mounting base 6 is also coaxially mounted on the drive shaft 3. Both ends of the drive shaft 3 are rotatably connected to the mounting base 6. One end of the mounting base 6 is fixedly connected to the transmission housing 4, and the other end is rotatably connected to the axle of the wheel 2. The mounting base 6 serves as a flexible connection hub between the transmission housing 4 and the wheel 2 axle, simultaneously transmitting the core power flow of drive torque, absorbing axial displacement caused by wheel 2 bouncing, and compensating for installation deformation caused by road impacts through internal bearings. The composite connection structure of the machine foot housing 6 can protect the transmission gear 31 from damage caused by misaligned loads.

[0032] Please see Figures 1-6A bearing is coaxially connected between the base housing 6 and the drive shaft 3, and a bearing is also connected between the base housing 6 and the axle of the wheel 2. An equipment box 5 is also installed above the transmission box 4. The gearbox body 1 is fixedly connected to the equipment box 5. The drive module 51 is fixedly installed inside the equipment box 5, and the drive module 51 uses a motor. A power supply 52 is installed inside the equipment box 5, and the power supply 52 is electrically connected to the drive module 51. A frame 8 is also fixedly connected to the side end face of the transmission box 4. Transmission boxes 4 are fixedly installed on both sides of the frame 8. A truss 9 is also fixedly installed at the bottom of the frame 8, and both ends of the truss 9 are fixedly connected to the base housing 6. The truss 9 serves as a bottom protective structure for the frame 8, and its two ends are rigidly connected to the base housing 6 to form a closed load-bearing ring. This structure directly transmits the terrain impact force borne by the wheel 2 to the main body of the frame 8 through the truss 9, preventing the impact load from being transmitted to the precision gear system of the transmission box 4; at the same time, it raises the height of the transmission components above the ground.

[0033] Example 2: Please refer to Figures 7-10 A radially expandable conical elastic meshing gear 7 is coaxially rotatably connected below the output gear 111. The radial expansion characteristic of the elastic meshing gear 7 dynamically compensates for the axial offset of the transmission gear 31, solving the gear meshing misalignment problem caused by the inverted V-shaped layout. Its conical configuration automatically adjusts the tooth surface contact area under off-center loads, eliminating the edge contact stress concentration phenomenon caused by spatial orientation deviations in traditional rigid gears. The elastic meshing gear 7 is an idler gear; its idler design ensures that it only transmits bearing force without participating in power diversion, avoiding additional power loss. The elastic meshing gear 7 meshes with both sets of transmission gears 31 simultaneously, and the axial connections of the elastic meshing gear 7, the output gear 111, and the two sets of transmission gears 31 form a trapezoidal shape. This trapezoidal axial layout forms a stable geometric constraint framework, suppressing radial movement of the transmission gear 31 through three-point positioning under bumpy vehicle conditions, maintaining the stability of the meshing interface spatial relationship. The elastic meshing gear 7 exerts a continuous bearing force on the meshing surface of the transmission gear 31 through its radial elastic expansion. The elastic meshing gear 7 includes a telescopic shaft 71, a radial elastic structure 72, and arc-shaped tooth segments 73. The telescopic shaft 71 is equipped with a spring that provides axial elastic support. One end of the telescopic shaft 71 is coaxially rotatably connected to the output gear 111, and the other end of the telescopic shaft 71 is coaxially fixedly installed with the radial elastic structure 72. Four or more arc-shaped tooth segments 73 are evenly distributed along the circumference of the radial elastic structure 72. The arc-shaped tooth segments 73 can be radially synchronously displaced with the radial elastic structure 72, and during the displacement, the arc-shaped tooth segments 73 maintain the meshing state with the transmission gear 31. The circumferentially evenly distributed arc-shaped tooth segments 73 constitute an omnidirectional floating support system, ensuring that the transmission gear 31 can obtain a balanced bearing force in any off-center load direction.

[0034] Please see Figures 7-10The arc-shaped tooth segment 73 is an integrated flexible tooth ring, consisting of a rigid matrix and a flexible surface layer. The flexible layer decreases in thickness from the tooth root to the tooth tip, while the surface layer absorbs meshing impact energy. The decreasing thickness of the flexible layer from the tooth root to the tooth tip forms a gradient buffer zone. When the transmission gear 31 suddenly jams, the flexible layer at the tooth tip preferentially undergoes elastic deformation to avoid hard collision, while the rigid area at the tooth root ensures reliable power transmission. This gradual change in rigidity and flexibility prevents the risk of tooth breakage and reduces transmission noise. The radial elastic structure 72 uses a multi-chamber hydraulic bladder. The chambers are connected by damping micropores to achieve slow-release flow of hydraulic medium between the chambers, providing balanced support force to the circumferentially distributed arc-shaped tooth segments 73. When a local tooth segment is subjected to abnormal load, the hydraulic medium flows to adjacent chambers through the micropores, automatically balancing the radial pressure on each arc-shaped tooth segment 73. The radial elastic structure 72 generates radial support force on four or more circumferentially distributed arc-shaped tooth segments 73. The bottom of the radial elastic structure 72 is connected to an indicator disk 41 that responds to the deformation of the radial elastic structure 72 via a connecting pipe, forming a visual deformation mapping. When the axis of the transmission gear 31 is offset, causing the radial elastic structure 72 to compress, the indicator disk 41 displays a high-level warning of an abnormally increased gear pair clearance. When the radial elastic structure 72 expands, the low-level display indicates excessive meshing. The indicator disk 41 is fixedly mounted on the transmission box 4, and radial telescopic support frames are provided at both the upper and lower ends of the radial elastic structure 72 to enhance its structural stability. The radial telescopic support frames form a cross-shaped constraint frame at the upper and lower ends of the radial elastic structure 72, suppressing circumferential twisting during radial deformation of the radial elastic structure 72, ensuring that the radial elastic structure 72 only produces linear displacement along the design direction, and preventing the arc-shaped tooth segment 73 from deflecting due to instability of the radial elastic structure 72.

[0035] Working Principle: During operation, the transmission structure of this invention drives the input shaft in the gearbox body 1 through the drive module 51. The power of the input shaft is transmitted to the output shaft 11 after being changed by the gearbox body 1. The output shaft 11 drives the output gear 111 to rotate. At the same time, the output gear 111 meshes with two sets of symmetrically arranged transmission gears 31 to form a power split. Each transmission gear 31 drives the drive gear 32 to rotate through the transmission shaft 3. The drive gear 32 directly transmits power to the wheel 2, ultimately driving the wheel 2 to rotate. When the vehicle needs to turn, by independently controlling the output speed and rotation direction of the transmission system on both sides of the frame 8, when one side wheel 2 generates a positive driving torque, the other side wheel 2 applies a reverse braking torque or maintains zero torque output, forcing the vehicle to achieve a pure rolling steering with a very small radius based on the instantaneous steering center. This achieves near-stationary U-turns or a very small turning radius, making this drive mode of the structure greatly improve the vehicle's driving performance in narrow jungle trails, rock crevices, or areas with dense obstacles.

[0036] When the transmission structure of this invention is applied to a four-wheeled all-terrain vehicle, its transmission system can effectively avoid the gear wear caused by uneven power on both sides of the traditional all-terrain vehicle transmission system. During vehicle operation, two sets of drive shafts 3 are arranged at an angle greater than 90°, and the axis of drive shaft 3 and the axis of output shaft 11 maintain an acute angle relationship of less than 90°. When the output gear 111 rotates to drive the drive gears 31 on both sides, the inclined drive shaft 3 forms an inverted V-shaped structure. If one wheel 2 encounters greater resistance during vehicle operation, the reaction force of the drive gear 31 on that side on the output gear 111 increases. Since the drive shaft 3 and the output shaft 11 are arranged at an acute angle, the lever arm is shortened, which improves the torque transmission efficiency. At the same time, the reaction force of the drive shaft 3 on the other side is reduced due to the decrease in resistance, and the lever arm is relatively extended, which reduces the torque transmission efficiency. This inverted V-shaped structure automatically balances the torque distribution on both sides through dynamic lever arm adjustment, avoiding gear damage caused by uneven load in traditional transmission systems. When applied to all-terrain vehicles, this invention achieves adaptive power distribution for all-terrain road conditions without the need for a mechanical differential through the synergistic effect of its inverted V-shaped structure and gear type. At the same time, the drive shaft 3 greatly increases the ground clearance of the vehicle chassis, which greatly reduces the probability of contact with protruding obstacles such as rocks.

[0037] Furthermore, this lateral symmetrical drive mode can significantly enhance the vehicle's anti-roll capability. In the case of traversing a slope, the ground pressure difference between the left and right wheels 2 is greatly reduced compared to the front and rear drive wheels 2, which can effectively prevent power interruption caused by one side being suspended and reduce the occurrence of slippage. Secondly, the lateral concentration of the transmission path shortens the length of the power transmission chain, and the reduction of transmission inertia brings about an improvement in instantaneous response speed. Especially in the test of getting out of trouble on muddy roads, the response delay of wheel 2 is greatly shortened.

[0038] Meanwhile, the elastic meshing gear 7 structure provides bidirectional elastic support for the transmission gears 31, which are arranged at an angle greater than 90° between the two sets of transmission shafts 3 in this invention. During power transmission, the telescopic shaft 71, through the axial elastic support provided by its built-in spring, drives the arc-shaped tooth segment 73 to generate a continuous thrust along the axis of the output gear 111, causing the arc-shaped tooth segment 73 to form an axial preload on the meshing surface of the transmission gear 31. At the same time, under the synergistic effect of the multi-chamber hydraulic bladder, the radial elastic structure 72 drives the arc-shaped tooth segment 73 to move synchronously in a direction perpendicular to the axis of the output gear 111, applying a radial holding force to the meshing surface of the transmission gear 31. The synergistic effect of the axial preload and the radial holding force can continuously maintain the meshing interface between the transmission gear 31 and the output gear 111 in the optimal contact state under dynamic loads or axial offset conditions of the transmission system, effectively compensating for the spatial orientation deviation of the gear pair caused by the inverted V-shaped transmission shaft 3 layout. When the relative axis misalignment between the transmission gear 31 and the output gear 111 occurs, the radial elastic structure 72 undergoes radial deformation, which is transmitted to the indicator disc 41 drive mechanism via the hydraulic medium in the connecting pipe. This causes the indicator disc 41 to switch between high-level and low-level display marks in the compressed and expanded states, respectively. By mapping the display state change to the gear axis misalignment, a signal is provided to the operator indicating the change in the meshing state between the output gear 111 and the transmission gear 31. The operator can directly read the status information through the observation window of the transmission box 4, significantly reducing the technical threshold and maintenance cost of field maintenance for all-terrain vehicles. This effectively ensures that maintenance intervention is triggered before irreversible wear occurs on the tooth surfaces of the output gear 111 and the transmission gear 31, avoiding chain damage to the transmission system. Furthermore, this part of the structure is purely mechanical and requires no power supply, maintaining reliable indication functionality even in high humidity, high vibration, and drastic temperature changes in the field.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A remote control four-wheel all-terrain transmission axle gearbox, comprising a gearbox body (1), an input shaft and an output shaft (11), the input shaft and the output shaft (11) are both rotationally connected to the gearbox body (1), the input shaft is connected with a driving module (51), and the output shaft (11) is fixedly connected with an output gear (111), characterized in that: The output gear (111) is engaged with two groups of transmission gears (31) connected with transmission shafts (3), the lower end of the transmission shaft (3) is drivingly connected with a wheel (2), when the output gear (111) rotates, it drives the two groups of transmission shafts (3) to rotate the wheel (2); ​ One end of the transmission shaft (3) is fixedly connected with the transmission gear (31), the other end of the transmission shaft (3) is fixedly connected with a driving gear (32), the driving gear (32) is drivingly connected between the wheel (2), the transmission gear (31), the driving gear (32) and the output gear (111) are all conical gears, the two groups of transmission shafts (3) are obliquely arranged, the included angle between the two groups of transmission shafts (3) is greater than 90°, the included angle between the axis of the transmission shaft (3) and the axis of the output shaft (11) is less than 90°. The output gear (111) is coaxially and rotatably connected with a radially elastically expandable conical elastic engagement gear (7) below, the elastic engagement gear (7) is an idler gear, the elastic engagement gear (7) is engaged with the two groups of transmission gears (31) at the same time, and the axes of the elastic engagement gear (7), the output gear (111) and the two groups of transmission gears (31) are connected to form a trapezoidal shape; the elastic engagement gear (7) forms a continuous pressing force on the engagement surface of the transmission gear (31) through the radial elastic expansion thereof; The elastic engagement gear (7) comprises a telescopic rotating shaft (71), a radial elastic structure (72) and an arc-shaped tooth segment (73), the telescopic rotating shaft (71) is internally provided with a spring for providing an axial elastic support, one end of the telescopic rotating shaft (71) is coaxially and rotatably connected with the output gear (111), the other end of the telescopic rotating shaft (71) is coaxially and fixedly provided with the radial elastic structure (72), four or more arc-shaped tooth segments (73) are distributed at equal angles along the circumference of the radial elastic structure (72), the arc-shaped tooth segments (73) are synchronously displaced radially along with the radial elastic structure (72), and the arc-shaped tooth segments (73) maintain the engagement state with the transmission gear (31) during the displacement process and form a continuous pressing force on the tooth surface of the transmission gear (31).

2. The remote-control four-wheel all-terrain axle transfer case of claim 1, wherein: The transmission case (4) is symmetrically provided with shaft holes at two ends, the transmission shaft (3) is coaxially and rotatably installed in the shaft holes, a machine foot shell (6) is coaxially arranged on the transmission shaft (3), the transmission shaft (3) is rotatably connected with the machine foot shell (6) at two ends, one end of the machine foot shell (6) is fixedly connected with the transmission case (4), and the other end of the machine foot shell (6) is rotatably connected with the shaft of the wheel (2).

3. The remote-control four-wheel all-terrain axle transfer case of claim 2, wherein: A bearing is coaxially connected between the machine foot shell (6) and the transmission shaft (3), and a bearing is connected between the machine foot shell (6) and the shaft of the wheel (2).

4. The remote control four-wheel all terrain axle transfer case of claim 2, wherein: The transmission box (4) is further provided with an equipment box (5), the transmission box body (1) is fixedly connected with the equipment box (5), the driving module (51) is fixedly installed in the equipment box (5), and the driving module (51) adopts a motor, the equipment box (5) is provided with a power supply (52), and the power supply (52) is electrically connected with the driving module (51).

5. The remote control four-wheel all terrain axle transfer case of claim 1, wherein: The arc-shaped tooth segment (73) is an integrated flexible tooth ring, the arc-shaped tooth segment (73) is composed of a rigid base body and a surface flexible layer, the flexible layer decreases in the direction from the tooth root to the tooth top of the arc-shaped tooth segment (73), the radial elastic structure (72) generates radial support force on four or more than four arc-shaped tooth segments (73) uniformly distributed in the circumferential direction; the bottom of the radial elastic structure (72) is connected with an indicating disc (41) responding to the deformation amount of the radial elastic structure (72) through a connecting pipe, wherein the compression state of the radial elastic structure (72) corresponds to the high position display of the indicating disc (41), and the expansion state of the radial elastic structure (72) corresponds to the low position display of the indicating disc (41).

6. The remote-control four-wheel all-terrain axle transfer case of claim 5, wherein: The indicating disc (41) is fixedly installed on the transmission box (4), and the upper end and the lower end of the radial elastic structure (72) are both provided with a radial telescopic support frame enhancing the structural stability of the radial elastic structure (72).

7. The remote control four-wheel all terrain axle transfer case of claim 2, wherein: The side end face of the transmission box (4) is further fixedly connected with a vehicle frame (8), the vehicle frame (8) is fixedly installed with the transmission box (4) on both sides, and the bottom of the vehicle frame (8) is further fixedly installed with a truss (9), and the both ends of the truss (9) are fixedly connected with the machine leg shell (6).

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