Power output structure of high-power dune buggy

Abstract

The invention discloses a power output structure of a high-power dune buggy, which belongs to the technical field of driving assemblys.The power output structure of the high-power dune buggy comprises a mounting base, a speed reduction wheel set, a main wheel set, a first motor and a second motor, the speed reduction wheel set and the main wheel set are arranged in the mounting base and are meshed all the time, and the first motor and the second motor are fixed on the outer wall of the mounting base. The first motor and the second motor are meshed with the speed reduction wheel set through motor wheels respectively. Through optimization of an active heat dissipation structure, two motors synchronously work under the conditions of medium and low speed four-wheel drive of the electric drive assembly, the impeller can generate continuous air flow and distribute the generated air flow in a centralized manner, the air flow speed can be changed through the air distribution shell, the contact mode of the air flow and the motors is changed through the machine shell, and the heat dissipation efficiency is improved. And insufficient heat dissipation caused by low-speed rotation of the impeller is compensated, and efficient heat dissipation is conducted on the two motors.

Description

Technical Field

[0001] The present invention belongs to the technical field of drive components, and particularly relates to a power output structure for a high-power beach vehicle. Background Art

[0002] An electric beach vehicle is a beach vehicle driven by electricity. Compared with traditional fuel off-road beach vehicles, the drive components of electric beach vehicles use electric drive. Therefore, no noise from the fuel engine is generated during startup and operation, bringing a quiet atmosphere to the beach environment. The power output of the motor is relatively stable and linear compared to that of an internal combustion engine, and the acceleration performance is relatively gentle, which provides a different driving experience for the driver.

[0003] The existing Chinese utility model patent with the publication number CN220883940U discloses a connection structure between the rear fork and the rear axle of an electric beach vehicle, which is used for rear-wheel drive during use. However, the beach is loose and has many undulations, and the rear-wheel drive has poor passability, resulting in the beach vehicle mostly being able to travel at low speeds. Moreover, low-speed rotation will cause the motor to heat up severely. However, this motor installation method in this solution cannot dissipate heat sufficiently, resulting in high motor power consumption and short battery life. In view of this, a power output structure for a high-power beach vehicle is provided. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a power output structure for a high-power beach vehicle.

[0005] The technical solution adopted to solve the above technical problem is as follows:

[0006] A power output structure for a high-power beach vehicle includes a mounting seat. A reduction gear set and a main gear set that are always engaged are arranged inside the mounting seat. A motor one and a motor two are fixed on the outer wall of the mounting seat. The motor one and the motor two are respectively engaged with the reduction gear set through motor wheels. It further includes:

[0007] An auxiliary gear set coaxially arranged with the reduction gear set. The auxiliary gear set includes a sprocket shaft. An auxiliary driven wheel engaged with the reduction gear set is rotatably installed at the end of the sprocket shaft. A sub-sprocket is fixed in the middle of the sprocket shaft;

[0008] A coupling coaxially arranged with the sprocket shaft. The coupling includes a driving rod coaxially arranged in a sliding hole of the sprocket shaft. A key rod extending outside the sliding hole is installed at the end of the driving rod. A pressing block is fixed on one side of the auxiliary driven wheel facing the key rod. The driving rod can push the key rod to press the pressing block;

[0009] An impeller is installed at the end of the motor wheel. The outer parts of the first motor and the second motor are provided with a first housing and a second housing respectively, forming an annular air cavity. The rotation of the impeller generates a continuous air flow among the air guide housing, the air distribution housing and the annular air cavity. A partition is slidably installed inside the air distribution housing, and the movement of the driving rod can drive the partition to reduce the inner diameter of the air distribution housing and increase the speed of the continuous air flow.

[0010] Further, the main wheel set includes a main shaft. A main driving and driven wheel meshing with the reduction wheel set is fixedly installed on the outer side of the main shaft. A main sprocket is fixedly installed on the outer side of the main shaft. The mounting seat includes two beam frames. A housing is installed between the two beam frames. Chain passing holes are provided in the housing corresponding to the positions of the main sprocket and the auxiliary sprocket.

[0011] Through the above technical solution, on a four-rear-wheel beach vehicle, for synchronous driving of the four rear wheels, a main sprocket is installed on the main shaft. The main shaft directly provides driving force for two of the rear wheels. Then, power is transmitted to another wheel axle through a chain, and the other two rear wheels are driven by the other wheel axle. At the same time, the auxiliary sprocket also provides driving force for the two front wheels through a chain. The compactness and expandability of the driving structure are better. Moreover, the beam frames serve as strengthened supports, and a supporting part is connected to the lower part and fixed to the chassis of the beach vehicle. Since it is not directly fixed to the vehicle frame, it can be adapted to the chassis of different types of beach vehicles, with stronger expandability. The housing plays a role in wrapping and sand prevention, and chain passing holes are provided and matched with a chain box, which does not affect the expansion of the rear wheels and the four-wheel drive transmission of the front wheels.

[0012] Further, the air guide housing includes two centrifugal sections. The two impellers are respectively installed in the centrifugal sections. An air inlet section is fixedly penetrated at the center of the centrifugal section. A collecting section is installed on the circumferential side wall of the centrifugal section. A relay section is installed outside the auxiliary driven wheel in the collecting section. An overflow hole is provided in the relay section corresponding to the key rod and the pressing block. An avoidance section is provided above the auxiliary sprocket in the relay section. The avoidance section is communicated with the air distribution housing.

[0013] Through the above technical solution, to ensure that the impeller directly installed inside the housing can generate a heat dissipation air flow towards the directions of the first motor and the second motor, a specific configuration of the air guide housing is provided. The centrifugal section is a cylindrical hollow shell, and an air inlet section is installed by opening a hole at the center. A filter screen can be installed at the opening of the air inlet section to isolate solid foreign matters. The relay section at the position of the auxiliary driven wheel can be matched with the avoidance section to extend over the auxiliary sprocket to the position of the air distribution housing installed on the same side as the first motor and the second motor, and does not affect the driving of the front wheels by the auxiliary sprocket through a chain. The relay section can be provided with an overflow hole to overflow part of the heat dissipation air flow, and specifically dissipate heat from the position where the coupling is engaged with the auxiliary driven wheel, ensuring that the temperature of the key rod and the pressing block as contact parts is in a reasonable state when frequently switching between two-wheel drive and four-wheel drive states.

[0014] Further, a telescopic cylinder is fixedly installed on the outer wall of the middle shell. The telescopic cylinder is rotatably connected to the driving rod, and the telescopic axis of the telescopic cylinder is coaxially arranged with the rotation axis of the driving rod.

[0015] Through the above technical solution, the telescopic cylinder provides driving force for the forward and backward sliding of the driving rod. Since the driving rod needs to rotate with the sprocket shaft, the telescopic cylinder needs to be rotatably connected to the telescopic cylinder. Therefore, a bushing with a stepped hole is installed at the end of the telescopic cylinder, and the middle of the bushing is connected to the driving rod through a tapered roller bearing, which can ensure that the forward and backward drive does not fall off, and can also ensure the rotational connection and the stability of the bearing under the force condition.

[0016] Further, the air distribution housing includes a middle shell. An air inlet that cooperates with the avoidance section is opened at a position of the middle shell away from the telescopic cylinder. A side shell is conductively connected to the side wall of the middle shell. A partition is slidably installed in the side shell. The cross-sectional profile of the partition is consistent with the profile of the internal channel of the side shell. Air outlets one and two are provided at positions of the side shell facing the first machine shell and the second machine shell. Inlets one and two are provided at positions of the first machine shell and the second machine shell corresponding to the air outlets one and two.

[0017] Through the above technical solution, to realize synchronous air supply to the two motors, the air inlet of the air distribution housing intakes air, and is distributed by the side shell to the positions of the air outlets one and two for synchronous air supply. Moreover, to ensure that the partition can change the inner diameter of the side shell, the partition needs to be vertically installed in the side shell and is consistent with the profile of the internal channel of the side shell. When the telescopic cylinder extends and the driving rod is inserted into the sprocket shaft, the partition closest to the telescopic cylinder in the side shell will be pushed to the middle position of the side shell, thus realizing the reduction of the inner diameter of the side shell.

[0018] Further, the middle shell is coaxially sleeved outside the driving rod. A piston plate is sleeved and installed on the inner side of the driving rod in the middle shell. The piston plate is fixedly connected to the partition. Baffles one and two are provided at positions of the partition corresponding to the air outlets one and two. The middle parts of the baffles one and two bend and extend towards the directions of the first motor and the second motor. The baffles one and two extend towards the sides opposite to the transverse movement direction of the partition. One ends of the baffles one and two at the positions of the air outlets one and two are of a bimetallic strip structure.

[0019] Through the above technical solutions, to ensure the efficient utilization of the cooling air flow, the air flow entering the middle housing will be blocked by the piston plate. The circumferential side wall of the piston plate and the inner wall of the middle housing are slidably sealed by a rubber strip to prevent overflow from the joint between the driving rod and the middle housing, and the air flow is completely guided into the side housing. Moreover, when the partition plate is in the middle of the side housing, the front sections of the first baffle and the second baffle can block the gap between the partition plate and the front inner wall of the side housing, ensuring the integrity of the inner walls of the first housing and the second housing. And, after installation, the middle parts of the first baffle and the second baffle are lapped with the outer walls of the first motor and the second motor. When the first motor is hotter and the second motor is colder, the cooling air flow can be guided to the hotter motor position as much as possible, making the heat dissipation more efficient.

[0020] Furthermore, the pressing contact block adopts a fan-shaped structure, the pressing contact blocks are arranged in an annular array centered on the center of the secondary driven wheel, there are spacing grooves formed between the pressing contact blocks, and side contact blocks are provided at the positions of the pressing contact blocks facing the spacing grooves.

[0021] Through the above technical solutions, to ensure the stability of four-wheel drive engagement, the pressing contact blocks are spaced apart to form spacing grooves for the key rod to be inserted between adjacent two pressing contact blocks, so that the frictional contact can be transformed into direct clamping. The required engagement force is smaller and the engagement is more firm. And side contact blocks are installed on the vertical side walls of the pressing contact blocks. The pressing contact blocks are made of rubber material, which can realize the impact absorption and transformation when the key rod is inserted into the spacing groove, reduce the vibration and impact damage during switching, and the operation is smoother and the service life is longer.

[0022] Furthermore, a slider is installed at the end of the key rod. The slider is sleeved and installed outside the sprocket shaft. There are notches two arranged in an annular array on the side of the slider facing the pressing contact block. There is a lining block between the notches of the slider. The size of the lining block is smaller than the size of the spacing groove.

[0023] Through the above technical solutions, to increase the smoothness of engagement, a slider is installed at the end of the rod-shaped key rod to replace the contact between the key rod and the pressing contact block. In the early stage of engagement, the lining block is used to frictionally engage with the pressing contact block. When the rotational speed is basically close, the lining block will be inserted into the spacing groove to complete the clamping, realizing a smoother engagement. At the same time, the slider is set as a hexagonal hole, which is slidably keyed with the hexagonal prism-shaped sprocket shaft, with a larger contact area, reducing the possibility of the key rod being bent by impact, and the structure is more stable and durable.

[0024] Furthermore, a rotating sleeve is fixedly installed on the side of the secondary sprocket facing the slider. A sliding opening is formed on the circumferential outer wall of the rotating sleeve. There is a notch one on the side of the slider facing the rotating sleeve. The slider and the rotating sleeve are inserted in a staggered manner through the notch one and the sliding opening. The sliding distance of the slider along the axis of the sprocket shaft is less than the lengths of the notch one and the sliding opening.

[0025] Through the above technical solution, for the sprocket shaft adapted to the optical axis, when the middle part of the slider is a light hole, the sliding clamping connection between the slider and the rotating sleeve is utilized to realize the transmission of the slider to the auxiliary sprocket. Cooperating with the fixed connection between the auxiliary sprocket and the sprocket shaft, the force on the auxiliary sprocket during engagement can be improved to be stable.

[0026] Furthermore, a notch is provided at one end of the slider where the notch is opened, and a clamping clip is clamped at the notch. The rotating sleeve is respectively provided with limiting grooves at two extreme positions corresponding to the translation of the clamping clip, and a position sensor is installed at the installation seat corresponding to the limiting grooves.

[0027] Through the above technical solution, the telescopic cylinder only needs to work during position conversion. After the position conversion is completed, the clamping clip can be used for clamping and limiting. The telescopic cylinder does not need to continuously provide driving force, which is more power-saving. Moreover, during use, if the telescopic cylinder is damaged or abnormal, the position of the slider can also be ensured to be stable, and there will be no gear disengagement or unstable gear position caused by problems with the telescopic cylinder. Since the clamping clip needs to be installed with a groove, a position sensor is installed at the grooving position, and the gear position is transmitted to the instrument panel to facilitate the user to understand the driving situation of the ATV.

[0028] The beneficial effects of the present invention are as follows:

[0029] (1) Through the optimization of the active heat dissipation structure in the present invention, in the electric drive assembly, in the low-speed four-wheel drive situation, the two motors work synchronously, the impeller can generate continuous airflow, and the generated airflow is centrally distributed. The airflow speed can be changed through the air distribution housing, and the contact mode between the airflow and the motor can be changed through the machine housing to compensate for the insufficient heat dissipation caused by the low-speed rotation of the impeller, and efficiently dissipate heat from the two motors;

[0030] (2) Through the improvement of the coupling in the present invention, the driving mode of the ATV can be changed. When starting and going uphill, the coupling engages the front wheel with the motor for four-wheel drive. When cruising at high speed, the coupling disengages the front wheel from the motor for two-wheel drive. And after the structure of the coupling is improved, only the power source needs to be involved during switching, and gear disengagement can be prevented during operation, the energy consumption control is better, and the smoothness and stability of engagement are strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the first perspective structure diagram of the present invention;

[0032] Figure 2 is the second perspective structure diagram of the present invention;

[0033] Figure 3 is the structure schematic diagram of the present invention in the state of removing the cover shell and the beam frame of the installation seat;

[0034] Figure 4 is the position schematic diagram between the reduction gear set, the auxiliary wheel set and the coupling of the present invention;

[0035] Figure 5 It is a schematic diagram of the disassembly between the auxiliary wheel set and the coupling of the present invention;

[0036] Figure 6 It is a schematic diagram of the positions among the first motor, the second motor, the coupling, the mounting seat and the housing of the present invention;

[0037] Figure 7 It is a schematic diagram of the positions among the first motor, the second motor, the first housing, the second housing, the air intake housing and the air distribution housing of the present invention;

[0038] Figure 8 It is a schematic diagram of the positions among the first housing, the second housing, the housing, the air intake housing and the air distribution housing of the present invention;

[0039] Figure 9 It is a schematic diagram of the structure among the first motor, the second motor, the first housing, the second housing and the air intake housing of the present invention;

[0040] Figure 10 It is a schematic diagram of the position between the drive rod and the air distribution housing of the present invention.

[0041] Reference numerals: 1, mounting seat; 11, beam frame; 12, housing; 13, air intake housing; 131, intake section; 132, centrifugal section; 133, collection section; 134, relay section; 135, avoidance section; 14, air distribution housing; 141, middle housing; 142, side housing; 143, first baffle; 144, piston plate; 145, second baffle; 146, partition; 147, first air outlet; 148, second air outlet; 149, air inlet; 15, first housing; 151, first inlet; 16, second housing; 161, second inlet; 17, impeller; 2, supporting part; 3, first motor; 4, second motor; 5, coupling; 51, slider; 511, first notch; 512, second notch; 513, lining block; 514, slot; 515, clip; 52, pressing contact block; 521, side contact block; 522, spacing groove; 53, rotating sleeve; 531, sliding port; 532, limiting groove; 54, drive rod; 541, key rod; 55, telescopic cylinder; 56, position sensor; 6, main wheel set; 61, main shaft; 62, main driving and driven wheel; 63, main sprocket; 7, motor wheel; 8, reduction gear set; 9, auxiliary wheel set; 91, auxiliary driven wheel; 92, sprocket shaft; 921, sliding hole; 93, auxiliary sprocket. Detailed implementation manners

[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] As Figure 1 -Figure 10 As shown in the figure, this embodiment provides a power output structure for a high-power ATV, including a mounting base 1. Inside the mounting base 1, there is a continuously meshing reduction gear set 8 and a main gear set 6. The main gear set 6 provides rotational driving force for the rear wheels. There is a first motor 3 and a second motor 4 fixed to the outer wall of the mounting base 1. The first motor 3 and the second motor 4 are respectively meshed with the reduction gear set 8 through motor wheels 7. The two motors can work simultaneously to provide a large driving force, which can be used as the power source for a large-horsepower ATV. Redundancy design can also be carried out. If one motor is damaged, the other motor can still work. Moreover, two motors with different speed ranges can be designed, one low-speed motor and one high-speed motor. When in low-speed four-wheel drive, dual-motor drive is carried out. The low-speed motor compensates for the insufficient low-speed torque of the high-speed motor. In the high-speed state, the low-speed motor is powered off, reducing the high-speed driving resistance caused by the insufficient upper limit of the low-speed motor speed and saving more electricity. At the same time, the fact that the main gear set 6 and the reduction gear set 8 are always meshed can ensure the stable rear-wheel drive of the ATV. There is no shifting component in the direct mechanical transmission, and there will be no abnormal operation of the shifting component resulting in gear disengagement. As long as the first motor 3 and the second motor 4 are not both damaged, the ATV can move forward, with stronger practicality and higher fault tolerance and durability of the drive assembly:

[0044] In the use of an ATV, due to the poor and undulating beach road conditions, low-speed four-wheel drive is the main working condition. The actual problem solved by this solution is that during the low-speed four-wheel drive stage, the motor heats up rapidly. However, for the existing structure where the fan rotates actively for heat dissipation, the heat dissipation effect is poor at low speeds. This mismatch between the heating stage and the heat dissipation efficiency will lead to a relatively high failure rate of the drive assembly with the motor as the power source. Therefore, a specific configuration is provided to improve this actual problem existing in the electric four-wheel drive system of the ATV;

[0045] Regarding the auxiliary gear set 9, the auxiliary gear set 9 is coaxially arranged with the reduction gear set 8. Referring to Figure 3 and Figure 4 , the auxiliary gear set 9 includes a sprocket shaft 92. The sprocket shaft 92 is rotatably installed on the mounting base 1 through bearings. At the end of the sprocket shaft 92, an auxiliary driven wheel 91 meshing with the reduction gear set 8 is rotatably installed. The auxiliary driven wheel 91 is always meshed with the reduction gear set 8. In the two-wheel drive state, the auxiliary driven wheel 91 will rotate idly. A auxiliary sprocket 93 is fixed in the middle of the sprocket shaft 92. A chain (not shown in the figure, and the specific transmission method is subject to being able to achieve transmission without affecting the front-wheel steering, and will not be elaborated here) is installed between the auxiliary sprocket 93 and the front-wheel shaft. In four-wheel drive, the auxiliary driven wheel 91 drives the auxiliary sprocket 93 to rotate, and then provides rotational driving force for the front wheels through the chain;

[0046] Regarding the coupling 5, referring to Figure 4 and Figure 5 , the coupling 5 is coaxially arranged with the sprocket shaft 92 and is used to engage the auxiliary driven wheel 91 to drive the auxiliary sprocket 93 in four-wheel drive. Specifically, referring to Figure 5, a sliding hole 921 is opened at the axis of the sprocket shaft 92, and a through port is opened in the radial direction. The coupling 5 includes a driving rod 54 coaxially arranged in the sliding hole 921. A key rod 541 extending outside the sliding hole 921 is installed at the end of the driving rod 54. Both ends of the key rod 541 are located outside the sprocket shaft 92, and two engaging convex points can be formed. A pressing block 52 is fixed on the side of the secondary driven wheel 91 facing the key rod 541. During engagement, the driving rod 54 pushes the key rod 541 towards the position of the pressing block 52, and the pressing block 52 is pressed by the key rod 541 for frictional transmission, so that the secondary driven wheel 91 can drive the sprocket shaft 92 to rotate through the pressing block 52 and the key rod 541 to complete the engagement action;

[0047] To achieve efficient heat dissipation in the low-speed four-wheel drive state, referring to Figure 3 , Figure 7 and Figure 9 , the motor wheel 7 has stepped tooth grooves. The position with a larger diameter of the motor wheel 7 meshes with the reduction gear set 8. A spline groove is opened at the position with a smaller diameter of the motor wheel 7 for installing the impeller 17. The impeller 17 rotates in the air guide housing 13, and the generated air flow all enters the first housing 15 and the second housing 16 through the guidance of the air distribution housing 14. The outer diameters of the first motor 3 and the second motor 4 are smaller than the inner diameters of the first housing 15 and the second housing 16, and an annular air cavity can be formed. Referring to Figure 6 , exhaust holes are opened at the front end of the annular air cavity in the first housing 15 and the second housing 16 for the air flow after heat absorption to be discharged from one end of the first housing 15 and the second housing 16 away from the air distribution housing 14. Referring to Figure 10 , a partition 146 is slidably installed inside the air distribution housing 14. In the four-wheel drive state, the partition 146 will slide to the middle of the air distribution housing 14 driven by the driving rod 54, and the air flow will pass between the partition 146 and the inner wall of the air distribution housing 14. The reduction of the internal through diameter of the air distribution housing 14 will increase the speed of the continuous air flow, so that the air flow can flow along the annular air cavity to the position of the first motor 3 and the second motor 4 farthest from the air distribution housing 14 after changing direction when blowing to the first motor 3 and the second motor 4, and then flow axially along the first motor 3 and the second motor 4 and finally discharge from the annular air cavity, realizing complete wrapping heat dissipation of the first motor 3 and the second motor 4, changing the heat dissipation contact mode between the air flow and the first motor 3 and the second motor 4, and the air flow speed is relatively fast, so that more heat can be carried away more quickly. The structural improvement of the air guide housing 13 and the air distribution housing 14 is used to compensate for the insufficient heat dissipation caused by the low rotation speed of the impeller 17, and efficient heat dissipation of the first motor 3 and the second motor 4 is carried out in the low-speed state.

[0048] In a further embodiment, on the six-wheel ATV, there are four rear wheels. Referring to Figure 3In order to synchronously drive the four rear wheels, the main wheel set 6 includes a main shaft 61, a main driven wheel 62 meshing with the reduction wheel set 8 is fixedly installed on the outer side of the main shaft 61, and a main sprocket 63 is fixedly installed on the outer side of the main shaft 61. A main sprocket 63 is installed on the main shaft 61. The main shaft 61 directly provides driving force for two of the rear wheels, and then drives another wheel shaft through a chain, and drives the other two rear wheels through another wheel shaft. Figure 2 , Figure 3 and Figure 6 The mounting base 1 includes two beams 11, and a cover 12 is installed between the two beams 11. The cover 12 has chain holes corresponding to the positions of the main sprocket 63 and the secondary sprocket 93. At the same time, the secondary sprocket 93 also provides driving force to the two front wheels through the chain. The driving structure has better compactness and expandability. In addition, the beam 11 serves as a reinforced support, and the lower part is connected to the supporting part 2 and fixed to the chassis of the beach car. Because it is not directly fixed to the frame, it can be adapted to the standard beach car chassis, and the expandability is stronger. The cover 12 has the effect of wrapping and preventing sand, and has a chain hole to match the chain box, which does not affect the expansion of the rear wheel and the four-wheel drive transmission of the front wheel.

[0049] In a further embodiment, in order to ensure that the impeller 17 directly mounted inside the housing 12 can generate heat dissipation airflow toward the motor 1 3 and the motor 2 4, a specific configuration of the air bleed housing 13 is provided, referring to Figure 7 , Figure 8 and Figure 9 The air induction shell 13 includes two centrifugal sections 132, and the two impellers 17 are respectively installed in the centrifugal sections 132. The centrifugal section 132 is fixed with an air intake section 131 at the center of the circle, and a collecting section 133 is installed at the circumferential side wall of the centrifugal section 132. The centrifugal section 132 is a cylindrical hollow shell, and the air intake section 131 is installed with a hole at the center of the circle. A filter can be installed at the opening of the air intake section 131 to isolate solid foreign matter. The centrifugal section 132 is fully adapted to the outer diameter of the impeller 17, and the centrifugal force generated by the rotation of the impeller 17 is converted into air as much as possible. To ensure the flow of air, the relay section 134 at the position of the secondary driven wheel 91 can be matched with the avoidance section 135 to extend over the secondary sprocket 93 to the position of the valve housing 14 installed on the same side as the motor 1 3 and the motor 2 4, without affecting the driving of the front wheel by the secondary sprocket 93 through the chain. The relay section 134 can have an overflow hole to overflow part of the heat dissipation airflow, so as to carry out targeted heat dissipation at the joint position of the coupling 5 and the secondary driven wheel 91, and ensure that the temperature of the key rod 541 and the pressure contact block 52 as the contact parts is in a reasonable state when frequently switching between the two-wheel drive and four-wheel drive states.

[0050] In a further embodiment, the telescopic cylinder 55 provides a driving force for the forward and backward sliding of the driving rod 54, referring to Figure 6 and Figure 7, a telescopic cylinder 55 is fixedly installed on the outer wall of the middle shell 141. Since the driving rod 54 needs to rotate with the sprocket shaft 92, the telescopic cylinder 55 needs to be rotatably connected. Therefore, a bushing with a stepped hole is installed at the end of the telescopic cylinder 55. The middle of the bushing is connected to the driving rod 54 through a tapered roller bearing, which can ensure non-detachment of the front and rear drives while ensuring rotational connection and the stability of the bearing under force conditions.

[0051] In a further embodiment, to realize synchronous air supply to the two motors, refer to Figure 10 , the air distribution housing 14 includes a middle shell 141. An air inlet 149 that cooperates with the avoidance section 135 is provided at a position of the middle shell 141 away from the telescopic cylinder 55. A side shell 142 is conductively connected to the side wall of the middle shell 141. Air outlets 147 and 148 are provided at positions of the side shell 142 facing the first housing 15 and the second housing 16. The air inlet 149 of the air distribution housing 14 intakes air, and the air is distributed by the side shell 142 to the positions of the air outlets 147 and 148 for synchronous air supply. Moreover, a partition 146 is slidably installed in the side shell 142. The cross-sectional contour of the partition 146 is consistent with the contour of the internal channel of the side shell 142. Inlets 151 and 161 are provided at positions of the first housing 15 and the second housing 16 corresponding to the air outlets 147 and 148. To ensure that the partition 146 can change the inner diameter of the side shell 142, the partition 146 needs to be vertically installed in the side shell 142 and be consistent with the contour of the internal channel of the side shell 142. When the telescopic cylinder 55 extends and the driving rod 54 is inserted into the sprocket shaft 92, the partition 146 originally located on the side of the side shell 142 closest to the telescopic cylinder 55 will be pushed to the middle position of the side shell 142, realizing the reduction of the inner diameter of the side shell 142, enabling the air flow to enter the first housing 15 and the second housing 16 through the inlets 151 and 161 at a faster flow rate, ensuring that the cooling air flow can flow along the circumferential outer walls of the first motor 3 and the second motor 4 to the opposite sides of the inlets 151 and 161, and thus enabling the cooling air flow to completely wrap the entire circumferential outer walls of the first motor 3 and the second motor 4 to achieve efficient heat dissipation.

[0052] In a further embodiment, to ensure the efficient utilization of the cooling air flow, refer to Figure 10, the middle shell 141 is coaxially sleeved outside the driving rod 54. A piston plate 144 is sleeved and installed on the driving rod 54 inside the middle shell 141. The airflow entering the middle shell 141 will be blocked by the piston plate 144. The circumferential side wall of the piston plate 144 and the inner wall of the middle shell 141 are slidably sealed by a rubber strip to prevent overflow from the joint between the driving rod 54 and the middle shell 141, and it is completely guided into the side shell 142. At the same time, the piston plate 144 is fixedly connected to the partition plate 146. The partition plate 146 is provided with a first baffle 143 and a second baffle 145 corresponding to the first air outlet 147 and the second air outlet 148. The middle parts of the first baffle 143 and the second baffle 145 bend and extend towards the first motor 3 and the second motor 4. The first baffle 143 and the second baffle 145 extend towards the opposite sides of the transverse movement direction of the partition plate 146. One ends of the first baffle 143 and the second baffle 145 located at the first air outlet 147 and the second air outlet 148 are of a bimetallic strip structure. When the partition plate 146 is in the middle of the side shell 142, the front sections of the first baffle 143 and the second baffle 145 can block the gap between the partition plate 146 and the front inner wall of the side shell 142 to ensure the integrity of the inner walls of the first housing 15 and the second housing 16. Moreover, after installation, the middle parts of the first baffle 143 and the second baffle 145 are lapped with the outer walls of the first motor 3 and the second motor 4. When the first motor 3 is hotter and the second motor 4 is colder, the heat of the first motor 3 will be transferred to the bimetallic strip position of the first baffle 143, causing the first baffle 143 to bend towards the first motor 3, so that more airflow can pass through the first air outlet 147. Similarly, when the second motor 4 is colder, the bimetallic strip of the first baffle 143 will block the second air outlet 148 to the greatest extent, reducing the airflow passing through here, so that the cooling airflow can be guided to the hotter motor position as much as possible, and the heat dissipation is more efficient.

[0053] In a further embodiment, to ensure the stability of four-wheel drive engagement, refer to Figure 4 , the pressing contact block 52 adopts a fan-shaped structure. The pressing contact blocks 52 are arranged in an annular array with the center of the secondary driven wheel 91 as the center. There are spacer grooves 522 formed between the pressing contact blocks 52. The pressing contact blocks 52 are spaced apart to form spacer grooves 522 for the key rod 541 to be inserted between adjacent two pressing contact blocks 52, so that the frictional contact can be changed into a direct engagement. The required engagement force is smaller and the engagement is more firm. Side contact blocks 521 are provided at the positions of the pressing contact blocks 52 facing the spacer grooves 522. The pressing contact blocks 52 are made of rubber material, which can realize the impact absorption and conversion when the key rod 541 is inserted into the spacer grooves 522, reduce the vibration and impact damage during switching, and the operation is smoother and the service life is longer.

[0054] In a further embodiment, to increase the smoothness of engagement, a slider 51 is installed at the end of the key rod 541. The slider 51 is sleeved outside the sprocket shaft 92. On one side of the slider 51 facing the pressure contact block 52, there are notches two 512 arranged in an annular array. Between the notches two 512 of the slider 51, there is a lining block 513. The size of the lining block 513 is smaller than that of the spacing groove 522. Instead of the key rod 541 contacting the pressure contact block 52, in the early stage of engagement, the lining block 513 is used to frictionally engage with the pressure contact block 52. When the rotational speed is basically close, the lining block 513 will be inserted into the spacing groove 522 to complete the clamping, realizing a smoother engagement. A slider 51 is installed at the end of the rod-shaped key rod 541. At the same time, the slider 51 is provided with a hexagonal hole and is slidably keyed to the hexagonal prism-shaped sprocket shaft 92, with a larger contact area, reducing the possibility of the key rod 541 being bent by impact, and the structure is more stable and durable.

[0055] In a further embodiment, to adapt to the sprocket shaft 92 of the optical axis, refer to Figure 4 , on one side of the secondary sprocket 93 facing the slider 51, a rotating sleeve 53 is fixedly installed. A sliding opening 531 is provided on the circumferential outer wall of the rotating sleeve 53. On one side of the slider 51 facing the rotating sleeve 53, there is a notch one 511. The slider 51 and the rotating sleeve 53 are inserted in a staggered manner through the notch one 511 and the sliding opening 531. The distance that the slider 51 slides along the axis of the sprocket shaft 92 is less than the lengths of the notch one 511 and the sliding opening 531. When the middle part of the slider 51 is a light hole, by using the sliding clamping of the slider 51 and the rotating sleeve 53, the transmission of the slider 51 to the secondary sprocket 93 is realized. In cooperation with the fixed connection between the secondary sprocket 93 and the sprocket shaft 92, the force stability of the secondary sprocket 93 during engagement can be improved.

[0056] In a further embodiment, refer to Figure 4 and Figure 5 , at one end of the slider 51 where the notch one 511 is opened, there is a notch 514. A clamping clip 515 is clamped at the notch 514. The telescopic cylinder 55 only needs to work when changing positions. After the position change is completed, the clamping clip 515 can be used for clamping and limiting. The telescopic cylinder 55 does not need to continuously provide driving force, which is more power-saving. And, the rotating sleeve 53 is respectively provided with limiting grooves 532 corresponding to the two extreme positions of the translational movement of the clamping clip 515. A position sensor 56 is installed at the installation seat 1 corresponding to the limiting grooves 532. During use, if the telescopic cylinder 55 is damaged or abnormal, the position stability of the slider 51 can also be ensured, and there will be no gear disengagement or unstable gear position caused by problems with the telescopic cylinder 55. Because the clamping clip 515 needs to be grooved for installation, the position sensor 56 is installed at the grooving position, and a Hall sensor is used. The clamping clip 515 is made of metal and has a notch. After rotating one week, the Hall sensor will generate a pulse signal. By detecting the position of the clamping clip 515, the gear position situation can be determined. If there is gear disengagement or slipping, it can also be detected in real time and transmitted to the instrument panel to facilitate the user to understand the driving situation of the ATV and the working state of the driving components of the ATV in a timely manner.

[0057] The working principle of this embodiment is as follows:

[0058] During the starting and climbing processes of the ATV, the four-wheel drive state is activated to improve passability. The drive rod 54 of the coupling 5 slides horizontally, pressing the key rod 541 against the pressure contact block 52 to complete the engagement, enabling the rotation of the secondary driven wheel 91 to be transmitted to the sprocket shaft 92 and the secondary sprocket 93, providing driving force for the front wheels. The main wheel set 6 and the reduction wheel set 8 are always engaged, providing driving force for the rear wheels, thus completing the conversion from two-wheel drive to four-wheel drive.

[0059] In the four-wheel drive state, the motor operates under low-speed and high-torque conditions. In the low-speed and high-torque state, in order to obtain a larger torque output, the motor needs to increase the current. The increase in current leads to an increase in the resistance loss in the motor winding. According to Joule's law (Q = I 2 Rt), the square of the current is proportional to the generated heat. Therefore, the larger the current, the more heat is generated, and the faster the motor temperature rises. Moreover, the efficiency of the motor is not the highest at all operating points. In the low-speed and high-torque state, the efficiency of the motor is often lower than that in the high-speed and low-torque state. The decrease in efficiency means that more input energy is converted into heat energy rather than useful mechanical energy. At the same time, when operating at low speed, the efficiency of the active cooling system in which the impeller 17 rotates to generate a cooling air flow decreases, and the heat dissipation effect becomes worse, resulting in the heat inside the motor not being easily dissipated. Finally, due to the relatively large change rate of the magnetic flux, the hysteresis loss and eddy current loss will also increase correspondingly. These losses will all be converted into heat, leading to an increase in the motor temperature. The superposition of multiple factors causes the motor to quickly heat up, resulting in a poor working condition.

[0060] Therefore, to ensure that the working temperature of the motor is appropriate, the continuous air flow generated by the impeller 17 will be concentrated and directed to the outer wall position of the motor circumference. At the same time, the movement of the coupling 5 will change the internal flow path of the air distribution housing 14, increasing the flow velocity of the continuous air flow generated by the impeller 17 before it contacts the motor one 3 and the motor two 4, enabling the air flow to reach the farthest positions from the inlet one 151 and the inlet two 161 of the motor one 3 and the motor two 4, for wrapped heat dissipation and cooling. The bimetallic sheet of the partition 146 is used to block the inlet one 151 of the housing one 15 and the inlet two 161 of the housing two 16, and in cooperation with the change in the shape of the bimetallic sheet by the motor one 3 and the motor two 4, further enabling more of the cooling air flow to enter the motor positions with higher temperatures for targeted heat dissipation. Moreover, the impeller 17 is meshed with the reduction wheel set 8 through the motor wheel 7. Even if a single motor is used as the power source for starting or four-wheel drive, it can ensure that both impellers 17 can rotate to pump air towards the housing one 15 and the housing two 16, with an even better heat dissipation effect.

[0061] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A high-power ATV power output structure, including a mounting base (1), characterized in that, The mounting base (1) is internally provided with a deceleration gear set (8) and a main gear set (6) that are always engaged, and further includes: A secondary gear set (9), the secondary gear set (9) includes a sprocket shaft (92) rotatably connected to the mounting base (1), a secondary driven wheel (91) is rotatably installed at the end of the sprocket shaft (92), and a secondary sprocket (93) is fixed in the middle of the sprocket shaft (92); A coupling (5), the coupling (5) includes a driving rod (54) coaxially arranged in a sliding hole (921) of the sprocket shaft (92), a key rod (541) extending outside the sliding hole (921) is installed at the end of the driving rod (54), and a pressing contact block (52) corresponding to the key rod (541) is fixed on one side of the secondary driven wheel (91) facing the key rod (541); A first motor (3) and a second motor (4), the first motor (3) and the second motor (4) are engaged with the deceleration gear set (8) through motor wheels (7), an impeller (17) is installed at the end of the motor wheel (7), the first motor (3) and the second motor (4) are externally provided with a first housing (15) and a second housing (16) to form an annular air cavity, the impeller (17) rotates to generate a continuous air flow between the air guiding housing (13), the air distribution housing (14) and the annular air cavity, a partition plate (146) is installed in the air distribution housing (14), and the driving rod (54) can push the partition plate (146) to reduce the inner diameter of the air distribution housing (14) and increase the flow rate of the continuous air flow.

2. The power output structure of the high-power beach vehicle according to claim 1, characterized in that The main gear set (6) includes a main shaft (61), a main driven wheel (62) engaged with the deceleration gear set (8) is fixedly installed on the outer side of the main shaft (61), a main sprocket (63) is fixedly installed on the outer side of the main shaft (61), the mounting base (1) includes two beam frames (11), a housing (12) is installed between the two beam frames (11), and chain passing holes are provided in the housing (12) corresponding to the positions of the main sprocket (63) and the secondary sprocket (93).

3. The power output structure of the high-power beach vehicle according to claim 1, characterized in that The air guiding housing (13) includes two centrifugal sections (132), the two impellers (17) are respectively installed in the centrifugal sections (132), an air inlet section (131) is fixedly penetrated at the center of the centrifugal section (132), a collecting section (133) is installed on the circumferential side wall of the centrifugal section (132), a relay section (134) is installed outside the secondary driven wheel (91) of the collecting section (133), an overflow hole is provided in the relay section (134) corresponding to the key rod (541) and the pressing contact block (52), an avoidance section (135) is provided above the secondary sprocket (93) of the relay section (134), and the avoidance section (135) is communicated with the air distribution housing (14).

4. The power output structure of the high-power beach vehicle according to claim 1, wherein A telescopic cylinder (55) is fixedly installed on the outer wall of the middle housing (141), the telescopic cylinder (55) is rotatably connected to the driving rod (54), and the telescopic axis of the telescopic cylinder (55) is coaxially arranged with the rotation axis of the driving rod (54).

5. The power output structure of the high-power beach vehicle according to claim 4, wherein, The air distribution housing (14) includes a middle housing (141). An air inlet (149) that cooperates with the avoidance section (135) is provided at a position on the middle housing (141) far from the telescopic cylinder (55). A side housing (142) is conductively connected to the side wall of the middle housing (141). A partition plate (146) is slidably installed in the side housing (142). Air outlets one (147) and two (148) are provided at positions on the side housing (142) facing the first housing (15) and the second housing (16). Inlets one (151) and two (161) are provided at positions on the first housing (15) and the second housing (16) corresponding to the air outlets one (147) and two (148).

6. The power output structure of the high-power beach vehicle according to claim 5, characterized in that, The middle housing (141) is coaxially sleeved outside the driving rod (54). A piston plate (144) is sleeved and installed on the driving rod (54) inside the middle housing (141). The piston plate (144) is fixedly connected to the partition plate (146). The cross-sectional profile of the partition plate (146) is consistent with the internal channel profile of the side housing (142). A first baffle (143) and a second baffle (145) are provided at positions on the partition plate (146) corresponding to the air outlets one (147) and two (148). The middle parts of the first baffle (143) and the second baffle (145) bend and extend towards the first motor (3) and the second motor (4). One ends of the first baffle (143) and the second baffle (145) at the air outlets one (147) and two (148) are of a bimetallic sheet structure. The first baffle (143) and the second baffle (145) extend towards the opposite sides of the transverse movement direction of the partition plate (146).

7. The power output structure of the high-power beach vehicle according to claim 1, characterized in that The pressure contact block (52) adopts a fan-shaped structure. The pressure contact blocks (52) are arranged in an annular array with the center of the secondary driven wheel (91) as the center. An interval groove (522) is formed between the pressure contact blocks (52). Side contact blocks (521) are provided at positions on the pressure contact blocks (52) facing the interval groove (522).

8. The power output structure of the high-power beach vehicle according to claim 1, characterized in that, A slider (51) is installed at the end of the key rod (541). The slider (51) is sleeved outside the sprocket shaft (92). A second set of notches (512) arranged in an annular array are provided on one side of the slider (51) facing the pressure contact block (52). A lining block (513) is provided between the second set of notches (512) on the slider (51). The size of the lining block (513) is smaller than the size of the interval groove (522).

9. The power output structure of the high-power beach vehicle according to claim 8, wherein, A rotating sleeve (53) is fixedly installed on one side of the secondary sprocket (93) facing the slider (51). A sliding opening (531) is formed on the circumferential outer wall of the rotating sleeve (53). A first notch (511) is provided on one side of the slider (51) facing the rotating sleeve (53). The slider (51) and the rotating sleeve (53) are inserted in a staggered manner through the first notch (511) and the sliding opening (531). The sliding distance of the slider (51) along the axis of the sprocket shaft (92) is smaller than the lengths of the first notch (511) and the sliding opening (531).

10. The power output structure of the high-power beach vehicle according to claim 9, wherein, The slider (51) is provided with a notch one (511) at one end and a notch (514) at the other end. A clamping clip (515) is clamped at the notch (514). The rotating sleeve (53) is respectively provided with limit grooves (532) corresponding to two extreme positions of the translational movement of the clamping clip (515). A position sensor (56) is installed at the installation seat (1) corresponding to the limit grooves (532).

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