All-wheel drive device with low input torque for skid steer loader

Abstract

The invention discloses an all-wheel drive device with low input torque for a skid steer loader, and relates to the technical field of skid steer loaders. The torque increasing device comprises a motor arranged on a loader frame, a driving gear used for inputting low torque is arranged at the driving end of the motor, and the torque increasing device further comprises an output unit comprising an adjusting assembly and a torque increasing assembly; two groups of advancing units; a differential assembly and a constant-speed assembly are arranged in each advancing unit. The all-wheel drive device has the advantages that low torque is input only through the single motor, all-wheel drive output of high torque can be achieved through cooperation of the torque increasing assembly, the output size of the torque can be flexibly adjusted, differential rotation or constant-speed rotation of wheels can be flexibly achieved according to the running state and the running position of the skid steer loader, and the running stability of the skid steer loader is improved. The wheels of the skid steer loader can output large torque when running in different states, stable running under various complex road conditions is achieved, and the driving effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of skid steer loaders, and in particular to an all-wheel drive device with low input torque for a skid steer loader. Background Art

[0002] A skid loader is a small multifunctional engineering machine with the characteristics of flexible steering, compact structure and strong adaptability. It is widely used in construction, agriculture, municipal administration and other fields. Skid loader usually travels on dirt roads, ruins and other areas with poor road environment, which requires a large driving torque when driving. In order to improve the driving ability of the skid loader, a drive device is required to improve its driving ability.

[0003] Existing drive devices use a variety of ways to achieve the drive of a skid loader, such as an all-wheel drive device with low input torque for a skid loader with publication number CN108797695A, in which a control unit is composed of a battery, a frequency converter, an electric joystick and / or an electric hydraulic switch gear, and both sides of the controlled vehicle are composed of at least two wheels, wherein each wheel is connected to a planetary gear device, wherein the planetary gear device is connected through an infinite gear member on one side of the controlled vehicle, whereby the infinite gear member is connected to a single electric motor, whereby the electric motor is connected to the battery; In actual use, the existing drive device usually adopts a driving method in which two sets of engine devices drive the two rear wheels to rotate respectively, and drive the front wheel on the same side to rotate through a belt, or adopts a driving method in which four sets of engine devices independently drive four wheels. The above driving methods all require multiple sets of engines or electric motors, and the overall weight and energy consumption are both large. At the same time, the wheel speeds of multiple sets of wheels cannot be accurately controlled. For example, the prior art referred to above adopts a driving mode in which two groups of electric motors drive the rear wheels at the same time and cooperate with the belt to drive the front wheels. Not only is the counterweight heavier, but the running energy consumption is also higher. At the same time, the device adopts an electric motor to drive the rear wheels independently. When the torque is transmitted through the belt, more kinetic energy will be lost, so that the front wheels cannot output a large torque. At the same time, the wheel speeds of the front and rear wheels cannot be accurately regulated, and the differential and constant speed control of the rear wheels or the front wheels of the same group cannot be achieved. When the front and rear wheels slip, they cannot output a large torque, resulting in poor escape ability. Therefore, it is urgent to design an all-wheel drive device with low input torque for a skid steer loader to solve the above problems. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides an all-wheel drive device with low input torque for a skid loader, which solves the problems raised in the above background technology.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A four-wheel drive device with low input torque for a skid steer loader, including a motor on the loader frame, and a drive gear for inputting low torque is provided on the drive end of the motor. It further includes: An output unit, including an adjustment component and a torque increasing component. Among them, a drive gear disk matched with the drive gear is arranged in the adjustment component. The adjustment component is used to adjust the magnitude of the output torque, and the torque increasing component is used to achieve multi-stage torque increase of the output torque. An input gear for outputting high torque is arranged in the torque increasing component. An output central shaft is arranged on the loader frame, and an output gear matched with the input gear is arranged on the output central shaft; Two sets of traveling units, symmetrically arranged on both sides of the loader frame. Two wheels for traveling are arranged in each set of traveling units; A differential component and a constant speed component are arranged in each set of traveling units. Among them, the differential component is matched with the output central shaft to achieve differential rotation of the two wheels, and the constant speed component is matched with the output central shaft to achieve constant speed rotation of the two wheels.

[0006] Preferably, an output box is fixedly installed on the loader frame. The adjustment component includes a hydraulic adjustment rod fixedly installed on the output box. A speed adjustment roller is rotatably installed on the drive end of the hydraulic adjustment rod. A drive gear disk is fixedly installed on the speed adjustment roller, and the drive gear disk meshes with the drive gear. A speed adjustment mechanism is installed between the speed adjustment roller and the output box.

[0007] Preferably, the speed adjustment mechanism includes a linkage shaft rotatably installed in the output box. A speed adjustment small gear disk and a speed adjustment large gear disk are fixedly installed on the linkage shaft. A speed adjustment small gear and a speed adjustment large gear are fixedly installed on the speed adjustment roller, and the speed adjustment small gear is matched with the speed adjustment large gear disk, and the speed adjustment large gear is matched with the speed adjustment small gear disk.

[0008] Preferably, the torque increasing component includes a central gear fixedly installed on the linkage shaft. An installation frame is fixedly installed in the output box, and a plurality of internal gears are rotatably installed on the installation frame. The inner sides of the plurality of internal gears mesh with the central gear. An output mechanism is installed in the output box.

[0009] Preferably, the output mechanism includes an input shaft rotatably installed in the output box, and the input gear is fixedly installed on the input shaft. A rotating frame is fixedly installed on the input shaft, and a reduction gear ring is fixedly installed on the rotating frame through a plurality of connecting rods. The outer sides of the plurality of internal gears mesh with the inner side of the reduction gear ring.

[0010] Preferably, the differential assembly includes two wheel rollers rotatably mounted on the loader frame, and two wheels are respectively fixedly mounted on the two wheel rollers. A differential is fixedly mounted on the loader frame, and both wheel rollers are cooperated with the differential. The end of the output central shaft is located inside the differential and is cooperated with the differential; The differential is used to convert the rotation direction of the output central shaft and drive the two wheel rollers to rotate, and automatically regulate the rotation speeds of the two wheel rollers, so that the two wheels can travel at different speeds when turning.

[0011] Preferably, the constant speed assembly includes a support frame fixedly mounted on the loader frame, and a support shaft is rotatably mounted on the support frame. A universal joint is rotatably fitted on the output central shaft, and the universal joint is rotatably mounted on the loader frame through a connecting frame. A steering gear for adjusting the rotation direction is fixedly mounted on the loader frame, and the steering gear is cooperated with the support shaft. A clamping mechanism is installed between the steering gear and the universal joint, and a linkage mechanism is installed between the support shaft and both wheel rollers.

[0012] Preferably, the clamping mechanism includes an electric telescopic rod I rotatably mounted on the steering gear, and a clamping column is fixedly mounted on the electric telescopic rod I. A clamping cylinder is fixedly mounted on the universal joint, and the clamping cylinder rotates synchronously with the universal joint, and the clamping cylinder is cooperated with the clamping column; The output central shaft drives the universal joint to rotate, the rotation of the universal joint drives the clamping cylinder to rotate, the rotation of the clamping cylinder drives the clamping column and the electric telescopic rod I to rotate, and the rotation of the electric telescopic rod I drives the support shaft to rotate under the cooperation of the internal structure of the steering gear.

[0013] Preferably, the linkage mechanism includes a linkage gear fixedly mounted on the support shaft, and a linkage tooth ring is installed on the wheel roller through a positioning mechanism, and the linkage tooth ring is meshed with the linkage gear.

[0014] Preferably, the positioning mechanism includes a fixed cylinder fixedly mounted on the wheel roller, a plurality of electric telescopic rods II are fixedly mounted on the fixed cylinder, and a positioning rod is fixedly mounted on each electric telescopic rod II. A plurality of positioning holes are formed on the linkage tooth ring and are cooperated with the corresponding positioning rods.

[0015] The present invention provides a four-wheel drive device with low input torque for a skid steer loader. It has the following beneficial effects: 1. When driving the wheels, the four-wheel drive device can realize the simultaneous drive of the front and rear four wheels by using a single motor, that is, realize four-wheel drive. Compared with the multi-group drive devices in the prior art, it has the advantages of lower cost and lower overall weight.

[0016] 2. When driving the wheels, the all-wheel drive device can flexibly adjust the torque output according to actual conditions by adopting an electric motor drive and coordinating the adjustment of the speed control mechanism, which can achieve both a small torque increase and a large torque increase, thereby achieving a stronger drive.

[0017] 3. When the all-wheel drive device drives the wheels, the torque-increasing component cooperates with the motor to perform multi-stage torque increase on the low torque input by the motor, and outputs high torque to the output center shaft through the cooperation of the input gear and the output gear, thereby achieving torque increase and high output torque under low input torque, thereby improving the overall travel torque of the wheel, and improving the wheel's grip and hill climbing performance.

[0018] 4. When the all-wheel drive device drives the wheels, the torque output from the output center shaft can be transmitted to the two wheel rollers through the cooperation of the differential, and the two wheel rollers can be driven to rotate. When turning, the rotation speed of the two wheel rollers can be flexibly adjusted according to the turning requirements to achieve smooth turning of the skid loader.

[0019] 5. When driving the wheels, the all-wheel drive device can lock the two wheel rollers through the cooperation of the constant speed component when the skid loader slips on muddy roads. Even if the two wheels rotate at the same speed, the overall torque of the wheels is further improved, and the torque and speed are evenly distributed, thereby improving the overall escape ability of the wheels.

[0020] In summary, the present invention only needs to use a single electric motor to input a relatively low torque, and can achieve high-torque all-wheel drive output through the cooperation of the torque-increasing component, and can flexibly adjust the torque output size, and can flexibly realize differential rotation or constant speed rotation of the wheels according to the driving state and driving position of the skid loader, so that the wheels of the skid loader can output a larger torque when driving in different states, realize stable driving under a variety of complex road conditions, and achieve better driving effect.

[0021] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein: Figure 1 A schematic structural diagram of an all-wheel drive device with low input torque for a skid loader proposed by the present invention; Figure 2 for Figure 1Schematic diagram of the structure after rotating a certain angle; Figure 3 is Figure 2 Schematic diagram of the structure of the motor and the output box in Figure 4 is Figure 3 Schematic diagram of the internal structure of the output box in Figure 5 is Figure 4 Schematic diagram of the structure after removing the output box; Figure 6 is Figure 5 Exploded schematic diagram of the structure of Figure 7 is Figure 6 Schematic diagram of the structure of the driving gear and the linkage shaft in Figure 8 is Figure 7 Schematic diagram of the structure of the hydraulic adjusting rod after speed regulation in Figure 9 is Figure 6 and Figure 7 Top view comparison diagram of the hydraulic adjusting rod before and after speed regulation in Figure 10 is Figure 2 Schematic diagram of the structure of the wheel and the wheel roller in Figure 11 is Figure 10 Schematic diagram of the structure after removing two wheels; Figure 12 is Figure 11 Schematic diagram of the structure of the output middle shaft and the support frame in Figure 13 is Figure 12 Enlarged view of the structure of part A in Figure 14 is Figure 11 Front view of the internal structure of the linkage gear ring in

[0023] In the figure: 1 loading locomotive frame, 2 wheels, 3 motor, 4 output middle shaft, 5 output box, 6 output gear, 7 driving gear, 8 hydraulic adjusting rod, 9 input gear, 10 input shaft, 11 rotating frame, 12 reduction gear ring, 13 linkage shaft, 14 speed regulation small gear disk, 15 speed regulation large gear disk, 16 mounting frame, 17 internal gear, 18 central gear, 19 speed regulation roller, 20 speed regulation small gear, 21 speed regulation large gear, 22 driving gear disk, 23 differential, 24 wheel roller, 25 support frame, 26 linkage gear, 27 linkage gear ring, 28 steering gear, 29 universal joint, 30 engaging cylinder, 31 engaging column, 32 electric telescopic rod one, 33 fixed cylinder, 34 electric telescopic rod two, 35 positioning hole. Detailed implementation method

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Embodiment 1: Refer to Figures 1 - 2 , a four-wheel drive device with low input torque for a skid steer loader, including a motor 3 arranged on the loader frame 1, and a drive gear 7 for inputting low torque is arranged on the drive end of the motor 3. The motor 3 drives the drive gear 7 to rotate at a relatively high speed, and then inputs a relatively low torque through the drive gear 7 for overall drive.

[0026] This four-wheel drive device further includes: An output unit, including an adjustment component and a torque increasing component. The adjustment component is used to receive the low torque input by the drive gear 7 and flexibly adjust the magnitude of the torque through the adjustment component. The torque increasing component is used to perform secondary torque increase on the input torque, so as to achieve low torque input and high torque output; Two sets of traveling units, symmetrically arranged on both sides of the loader frame 1. Two wheels 2 for traveling are arranged in each set of traveling units. The traveling units cooperate with the output unit to convert the torque input by the motor 3, and then drive multiple wheels 2 to rotate simultaneously, realizing the all-wheel drive of multiple wheels 2.

[0027] Embodiment 2: Refer to Figures 2 - 9 , the different technical solutions of this embodiment compared with Embodiment 1 are as follows: A drive disk 22 matching the drive gear 7 is arranged in the adjustment component. The adjustment component is used to adjust the magnitude of the output torque to realize the automatic adjustment of torque output; The torque increasing component is used to realize multi-stage torque increase of the output torque. An input gear 9 for outputting high torque is arranged in the torque increasing component. An output central shaft 4 is arranged on the loader frame 1, and an output gear 6 matching the input gear 9 is arranged on the output central shaft 4.

[0028] An output box 5 is fixedly installed on the loader frame 1. The adjustment component includes a hydraulic adjustment rod 8 fixedly installed on the output box 5. A speed regulation roller 19 is rotatably installed on the drive end of the hydraulic adjustment rod 8. A drive disk 22 is fixedly installed on the speed regulation roller 19, and the drive disk 22 meshes with the drive gear 7; When the motor 3 starts, it will drive the drive gear 7 to rotate. When the drive gear 7 rotates, it will drive the drive disk 22 to rotate, and then drive the speed regulation roller 19 to rotate synchronously. And the tooth diameter of the drive disk 22 is larger than the tooth diameter of the drive gear 7, that is, the rotation of the drive gear 7 driving the drive disk 22 is a deceleration, so as to realize the preliminary increase of torque; A speed regulation mechanism is installed between the speed regulation roller 19 and the output box 5. The speed regulation mechanism includes a linkage shaft 13 rotatably installed in the output box 5. A speed regulation small gear disk 14 and a speed regulation large gear disk 15 are fixedly installed on the linkage shaft 13. A speed regulation small gear 20 and a speed regulation large gear 21 are fixedly installed on the speed regulation roller 19. The speed regulation small gear 20 is matched with the speed regulation large gear disk 15, and the speed regulation large gear 21 is matched with the speed regulation small gear disk 14; When the speed regulation roller 19 rotates, it will drive the speed regulation small gear 20 and the speed regulation large gear 21 on it to rotate synchronously. Starting by the hydraulic adjustment rod 8 will drive the speed regulation roller 19 to extend or contract, and then drive the speed regulation small gear 20, the speed regulation large gear 21, and the drive gear disk 22 on it to move synchronously. And because the width of the drive gear 7 is greater than the width of the drive gear disk 22, no matter how the drive gear disk 22 moves, it always meshes with the drive gear 7, and then will always drive the speed regulation roller 19 to rotate synchronously; As shown in the left side of the instruction manual appendix Figure 9 When the speed regulation small gear 20 meshes with the speed regulation large gear disk 15, at this time the speed regulation large gear 21 does not mesh with the speed regulation small gear disk 14. At this time, the speed regulation roller 19 drives the speed regulation small gear 20 to rotate, and then drives the speed regulation large gear disk 15 and the linkage shaft 13 to rotate, for a larger torque output; When the hydraulic adjustment rod 8 drives the speed regulation roller 19 to move, it will be transformed into the state shown in the right side of the instruction manual appendix Figure 9 That is, the speed regulation large gear 21 meshes with the speed regulation small gear disk 14, and the speed regulation small gear 20 does not mesh with the speed regulation large gear disk 15. And because the tooth diameter of the speed regulation large gear 21 is greater than that of the speed regulation small gear 20, and at the same time the tooth diameter of the speed regulation small gear disk 14 is less than that of the speed regulation large gear disk 15, the torque applied by the speed regulation small gear 20 to the speed regulation small gear disk 14 is in a reduced state at this time, that is, the reduction adjustment of the output torque is realized, and the output torque can be adjusted according to the actual situation, and the size of the output torque can be flexibly adjusted.

[0029] In a further embodiment, the torque increasing component includes a central gear 18 fixedly installed on the linkage shaft 13. An installation frame 16 is fixedly installed in the output box 5, and a plurality of internal gears 17 are rotatably installed on the installation frame 16. The inner sides of the plurality of internal gears 17 are all meshed with the central gear 18; When the linkage shaft 13 rotates, it will drive the central gear 18 on it to rotate. When the central gear 18 rotates, it will drive a plurality of internal gears 17 meshed with it to rotate, and then realize the continuous transmission of torque.

[0030] An output mechanism is installed in the output box 5. The output mechanism includes an input shaft 10 rotatably installed in the output box 5. An input gear 9 is fixedly installed on the input shaft 10. A rotating frame 11 is fixedly installed on the input shaft 10, and a reduction gear ring 12 is fixedly installed on the rotating frame 11 through a plurality of connecting rods. The outer sides of the plurality of internal gears 17 are all meshed with the inner side of the reduction gear ring 12; When multiple internal gears 17 rotate, they will synchronously drive the outer deceleration gear ring 12 to rotate. Since the tooth diameter of the deceleration gear ring 12 is much larger than that of the multiple internal gears 17, that is, when the internal gears 17 drive the deceleration gear ring 12 to rotate, a large torque will be applied, that is, a large torque increase is achieved. When the deceleration gear ring 12 rotates, it will drive the rotating frame 11 to rotate through multiple connecting rods. When the rotating frame 11 rotates, it will drive the input shaft 10 to rotate. When the input shaft 10 rotates, it will drive the input gear 9 to rotate. When the input gear 9 rotates, it will drive the output gear 6 to rotate, and then drive the output middle shaft 4 to rotate, that is, the output of torque is achieved. At the same time, since the tooth diameter of the input gear 9 is smaller than that of the output gear 6, a further torque increase can be achieved, and the torque increase is further realized, so that a large torque can be output through the output middle shaft 4.

[0031] Embodiment Three: Refer to Figures 1 - 2 and 10- Figure 14 Compared with Embodiment Two, the different technical solution of this embodiment is that: a differential assembly and a constant speed assembly are arranged in each traveling unit. The differential assembly cooperates with the output middle shaft 4 to realize the differential rotation of the two wheels 2, and the constant speed assembly cooperates with the output middle shaft 4 to realize the constant speed rotation of the two wheels 2; The differential assembly includes two wheel rollers 24 rotatably installed on the loader frame 1, and the two wheels 2 are respectively fixedly installed on the two wheel rollers 24. A differential 23 is fixedly installed on the loader frame 1, and the two wheel rollers 24 are both cooperated with the differential 23. The end of the output middle shaft 4 is located in the differential 23 and is cooperated with the differential 23; The rotation of the output middle shaft 4 will be transmitted into the differential 23, and through the cooperation of the differential 23, the rotation direction will be changed and then drive the two wheel rollers 24 to rotate together, that is, drive the two wheels 2 to rotate synchronously. And the differential 23 can automatically adjust the rotation speeds of the two wheel rollers 24 to realize the differential rotation of the two wheels 2. This part of the components is mainly used for the skid steer loader to adjust the rotation speed difference between the inner and outer wheels 2 of the curve through the differential 23 when turning, so as to realize smooth rotation.

[0032] The differential 23 is used to convert the rotation direction of the output middle shaft 4 and drive the two wheel rollers 24 to rotate, and at the same time automatically regulate the rotation speeds of the two wheel rollers 24, so that the two wheels 2 can travel at different rotation speeds when turning; The differential 23 is a device commonly used in the prior art for adjusting the rotation speeds of the two wheel rollers 24. It can change the rotation direction and drive the wheel rollers 24 to rotate, that is, it can automatically adjust the rotation speeds of the wheel rollers 24 to realize differential transmission. This device is the prior art and will not be elaborated here too much.

[0033] In a further embodiment, the constant speed component includes a support frame 25 fixedly mounted on the loader frame 1, and a support shaft is rotatably mounted on the support frame 25. A universal joint 29 is rotatably and cooperatively mounted on the output middle shaft 4, and the universal joint 29 is rotatably mounted on the loader frame 1 through a connecting frame. A steering gear 28 for adjusting the rotation direction is fixedly mounted on the loader frame 1, and the steering gear 28 cooperates with the support shaft; When the skid steer loader travels on a muddy or other complex road surface and slips, the setting of the differential 23 at this time will cause the torques distributed to the two wheels 2 to be uneven, that is, the wheel 2 on the slipping side will receive a larger torque, while the wheel 2 on the non-slipping side will receive a smaller torque, making the skid steer loader unable to get out of trouble all the time. Therefore, a constant speed component needs to be used to balance the torques between the two wheels 2 and achieve the uniform rotation of the two wheels 2, improving the overall ability to get out of trouble; At this time, the differential 23 can be closed so that the rotation of the two wheel rollers 24 is not affected by the differential 23. When the output middle shaft 4 rotates at this time, it will drive the universal joint 29 to rotate; A clamping mechanism is installed between the steering gear 28 and the universal joint 29. The clamping mechanism includes an electric telescopic rod 32 rotatably mounted on the steering gear 28, and a clamping column 31 is fixedly mounted on the electric telescopic rod 32. A clamping cylinder 30 is fixedly mounted on the universal joint 29, and the clamping cylinder 30 rotates synchronously with the universal joint 29, and the clamping cylinder 30 cooperates with the clamping column 31; Then start the electric telescopic rod 32 to drive the clamping column 31 to move, so that the clamping column 31 moves and is clamped into the clamping cylinder 30.

[0034] The output middle shaft 4 drives the universal joint 29 to rotate. The rotation of the universal joint 29 drives the clamping cylinder 30 to rotate. The rotation of the clamping cylinder 30 drives the clamping column 31 and the electric telescopic rod 32 to rotate. The rotation of the electric telescopic rod 32 drives the support shaft to rotate under the cooperation of the internal structure of the steering gear 28; Linkage mechanisms are installed between the support shaft and the two wheel rollers 24. The linkage mechanism includes a linkage gear 26 fixedly mounted on the support shaft. A linkage tooth ring 27 is installed on the wheel roller 24 through a positioning mechanism, and the linkage tooth ring 27 meshes with the linkage gear 26; When the support shaft rotates, it will drive the linkage gear 26 thereon to rotate. When the linkage gear 26 rotates, it will drive the meshing linkage tooth ring 27 to rotate synchronously. And the two linkage tooth rings 27 are both rotatably connected to the loader frame 1, and the loader frame 1 is used to limit and support the linkage tooth ring 27.

[0035] The positioning mechanism includes a fixed cylinder 33 fixedly mounted on the wheel roller 24. A plurality of electric telescopic rods 34 are fixedly mounted on the fixed cylinder 33, and a positioning rod is fixedly mounted on each electric telescopic rod 34. A plurality of positioning holes 35 are formed on the linkage tooth ring 27 and are matched with the corresponding positioning rods; When the constant speed rotation is performed, the electric telescopic rod 24 on the fixed cylinder 33 is started to drive the positioning rod to move, and the positioning rod is driven to move while slowly rotating until the positioning rod is engaged with the positioning hole 35 in the linkage gear ring 27. At this time, when the linkage gear ring 27 rotates, the fixed cylinder 33 and the wheel roller 24 are driven to rotate together through the cooperation of multiple positioning rods. That is, the rotation of the support shaft drives the fixed cylinder 33 to rotate through the cooperation of the linkage gear 26, the linkage gear ring 27 and the positioning rod, and then drives the two wheel rollers 24 to rotate. Since the rotation speed of the linkage gear 26 is the same, that is, the rotation speed of the two wheel rollers 24 is the same as that of the wheel 2, constant speed rotation is achieved, and then balanced distribution of torque is achieved. At this time, when one wheel 2 slips, the torque of the other wheel 2 can be effectively increased through the balanced distribution of torque, and the drive to get out of trouble can be achieved through the other wheel 2, thereby significantly improving the overall escape ability of the skid loader.

[0036] The specific driving principle of the all-wheel drive device is as follows: the motor 3 starts to drive the driving gear 7 to rotate, and when the driving gear 7 rotates, it will drive the driving toothed disc 22 to rotate, and then drive the speed regulating roller 19 to rotate synchronously, and the tooth diameter of the driving toothed disc 22 is larger than the tooth diameter of the driving gear 7, that is, the driving gear 7 drives the driving toothed disc 22 to rotate to reduce speed, thereby achieving a preliminary increase in torque; When the speed regulating roller 19 rotates, the torque is adjusted synchronously through the cooperation of the speed regulating mechanism, thereby driving the linkage shaft 13 to rotate. When the linkage shaft 13 rotates, it drives the central gear 18 thereon to rotate. When the central gear 18 rotates, it drives the multiple internal gears 17 meshing therewith to rotate. When the multiple internal gears 17 rotate, they will synchronously drive the outer reduction gear ring 12 to rotate. Since the tooth diameter of the reduction gear ring 12 is much larger than the tooth diameter of the multiple internal gears 17, when the internal gear 17 drives the reduction gear ring 12 to rotate, a larger torque will be applied, that is, a larger torque increase will be achieved. When the reduction gear ring 12 rotates, it will drive the rotating frame 11 to rotate through multiple connecting rods. The rotation of the rotating frame 11 will drive the input shaft 10 to rotate. When the input shaft 10 rotates, it will drive the input gear 9 to rotate. When the input gear 9 rotates, it will drive the output gear 6 to rotate, and then drive the output middle shaft 4 to rotate, thereby realizing the output of torque. At the same time, since the tooth diameter of the input gear 9 is smaller than the tooth diameter of the output gear 6, the torque can be increased again, and further torque increase can be achieved, and a larger torque can be output through the output middle shaft 4.

[0037] The rotation of the output middle shaft 4 will be transmitted to the differential 23, and the direction of rotation will be changed through the cooperation of the differential 23 to drive the two wheel rollers 24 to rotate together, so as to drive the two wheels 2 to rotate synchronously, and the differential 23 can automatically adjust the rotation speed of the two wheel rollers 24 to achieve differential rotation of the two wheels 2. This part of the component is mainly used for adjusting the speed difference between the inner and outer wheels 2 of the curve through the differential 23 when the skid loader is turning, so as to achieve smooth rotation; If the skid loader slips when driving on a muddy or other complex road, the differential 23 can be closed so that the rotation of the two wheel rollers 24 is not affected by the differential 23. At this time, the output middle shaft 4 rotates, which drives the universal joint 29 to rotate. Then the electric telescopic rod 1 32 is started to drive the engaging column 31 to move, so that the engaging column 31 moves and engages in the engaging cylinder 30. When the support shaft rotates, the linkage gear 26 on it rotates. When the linkage gear 26 rotates, it drives the linkage gear ring 27 meshing with it to rotate synchronously. When the constant speed rotation is performed, the electric telescopic rod 24 on the fixed cylinder 33 is started to drive the positioning rod to move, and the positioning rod is driven to move while slowly rotating until the positioning rod is engaged with the positioning hole 35 in the linkage gear ring 27. At this time, when the linkage gear ring 27 rotates, the fixed cylinder 33 and the wheel roller 24 are driven to rotate together through the cooperation of multiple positioning rods. That is, the rotation of the support shaft drives the fixed cylinder 33 to rotate through the cooperation of the linkage gear 26, the linkage gear ring 27 and the positioning rod, and then drives the two wheel rollers 24 to rotate. Since the rotation speed of the linkage gear 26 is the same, that is, the rotation speed of the two wheel rollers 24 is the same as that of the wheel 2, constant speed rotation is achieved, and then balanced distribution of torque is achieved. At this time, when one wheel 2 slips, the torque of the other wheel 2 can be effectively increased through the balanced distribution of torque, and the drive to get out of trouble can be achieved through the other wheel 2, thereby significantly improving the overall escape ability of the skid loader.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An all-wheel drive device with low input torque for a skid steer loader, comprising an electric motor (3) arranged on a loader frame (1), and a drive gear (7) for inputting low torque is arranged on a driving end of the electric motor (3), characterized in that: Also includes: The output unit comprises an adjustment component and a torque increasing component, wherein a driving toothed disc (22) matching with a driving gear (7) is arranged in the adjustment component, the adjustment component is used to adjust the magnitude of the output torque, the torque increasing component is used to achieve multi-stage torque increase of the output torque, an input gear (9) for outputting high torque is arranged in the torque increasing component, an output middle shaft (4) is arranged on the loader frame (1), and an output gear (6) matching with the input gear (9) is arranged on the output middle shaft (4); Two groups of traveling units are symmetrically arranged on both sides of the loader frame (1), and each group of traveling units is provided with two wheels (2) for traveling; A differential assembly and a constant speed assembly are provided in each traveling unit, wherein the differential assembly cooperates with the output middle shaft (4) to realize differential rotation of the two wheels (2), and the constant speed assembly cooperates with the output middle shaft (4) to realize constant speed rotation of the two wheels (2).

2. The all-wheel drive device with low input torque for a skid steer loader according to claim 1, characterized in that: An output box (5) is fixedly mounted on the loader frame (1); the adjustment assembly comprises a hydraulic adjustment rod (8) fixedly mounted on the output box (5); a speed regulating roller (19) is rotatably mounted on the driving end of the hydraulic adjustment rod (8); a driving sprocket (22) is fixedly mounted on the speed regulating roller (19); the driving sprocket (22) is meshed with a driving gear (7); and a speed regulating mechanism is mounted between the speed regulating roller (19) and the output box (5).

3. The all-wheel drive device with low input torque for a skid steer loader according to claim 2, characterized in that: The speed regulating mechanism comprises a linkage shaft (13) rotatably mounted in an output box (5), a small speed regulating toothed disc (14) and a large speed regulating toothed disc (15) being fixedly mounted on the linkage shaft (13), a small speed regulating gear (20) and a large speed regulating gear (21) being fixedly mounted on the speed regulating roller (19), the small speed regulating gear (20) being matched with the large speed regulating toothed disc (15), and the large speed regulating gear (21) being matched with the small speed regulating toothed disc (14).

4. The all-wheel drive device with low input torque for a skid steer loader according to claim 3, characterized in that: The torque increasing assembly comprises a central gear (18) fixedly mounted on a linkage shaft (13); a mounting frame (16) is fixedly mounted in the output box (5); a plurality of internal gears (17) are rotatably mounted on the mounting frame (16); the inner sides of the plurality of internal gears (17) are all meshed with the central gear (18); and an output mechanism is mounted in the output box (5).

5. The all-wheel drive device with low input torque for a skid steer loader according to claim 4, characterized in that: The output mechanism comprises an input shaft (10) rotatably mounted in an output box (5), and an input gear (9) fixedly mounted on the input shaft (10); a rotating frame (11) is fixedly mounted on the input shaft (10), and a reduction gear ring (12) is fixedly mounted on the rotating frame (11) via a plurality of connecting rods, and the outer sides of the plurality of internal gears (17) are all meshed with the inner sides of the reduction gear ring (12).

6. The all-wheel drive device with low input torque for a skid steer loader according to claim 1, characterized in that: The differential assembly comprises two wheel rollers (24) rotatably mounted on a loader frame (1), and two wheels (2) are respectively fixedly mounted on the two wheel rollers (24); a differential (23) is fixedly mounted on the loader frame (1), and the two wheel rollers (24) are matched with the differential (23); an end of the output center shaft (4) is located in the differential (23) and matches with the differential (23); The differential (23) is used to convert the rotation direction of the output center shaft (4) and drive the two wheel rollers (24) to rotate, while automatically regulating the rotation speed of the two wheel rollers (24) so ​​that the two wheels (2) can travel at different rotation speeds when turning.

7. The all-wheel drive device with low input torque for a skid steer loader according to claim 6, characterized in that: The constant speed assembly comprises a support frame (25) fixedly mounted on the loader frame (1), and a support shaft is rotatably mounted on the support frame (25); a universal joint (29) is rotatably mounted on the output middle shaft (4), and the universal joint (29) is rotatably mounted on the loader frame (1) via a connecting frame; a steering gear (28) for adjusting the rotation direction is fixedly mounted on the loader frame (1), and the steering gear (28) cooperates with the support shaft, a locking mechanism is installed between the steering gear (28) and the universal joint (29), and a linkage mechanism is installed between the support shaft and the two wheel rollers (24).

8. The all-wheel drive device with low input torque for a skid steer loader according to claim 7, characterized in that: The engaging mechanism comprises an electric telescopic rod (32) rotatably mounted on the steering gear (28), a engaging column (31) being fixedly mounted on the electric telescopic rod (32), a engaging cylinder (30) being fixedly mounted on the universal joint (29), the engaging cylinder (30) rotating synchronously with the universal joint (29), and the engaging cylinder (30) cooperating with the engaging column (31); The output middle shaft (4) drives the universal joint (29) to rotate, the rotation of the universal joint (29) drives the locking cylinder (30) to rotate, the rotation of the locking cylinder (30) drives the locking column (31) and the electric telescopic rod (32) to rotate, and the rotation of the electric telescopic rod (32) drives the support shaft to rotate in cooperation with the internal structure of the steering gear (28).

9. The all-wheel drive device with low input torque for a skid steer loader according to claim 8, characterized in that: The linkage mechanism comprises a linkage gear (26) fixedly mounted on a support shaft, a linkage gear ring (27) is mounted on the wheel roller (24) via a positioning mechanism, and the linkage gear ring (27) is meshed with the linkage gear (26).

10. The all-wheel drive device with low input torque for a skid steer loader according to claim 9, characterized in that: The positioning mechanism comprises a fixing cylinder (33) fixedly mounted on the wheel roller (24), a plurality of electric telescopic rods (34) fixedly mounted on the fixing cylinder (33), and a positioning rod fixedly mounted on each electric telescopic rod (34), and a plurality of positioning holes (35) matching with corresponding positioning rods are formed on the linkage gear ring (27).

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