Rear drive axle system of all-terrain vehicle
By integrating the transmission, reducer and other components into an integration box, a compact all-terrain vehicle rear drive axle system is designed, which solves the problem of insufficient structure of the all-terrain vehicle and insufficient torque, and achieves higher stability and handling.
Patent Information
- Application Number
- CN202421793464.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-25
AI Technical Summary
In the prior art, all-terrain vehicles lack a rear-drive axle system with a smaller structure than ordinary cars and withstand greater torque.
A rear-drive axle system for an all-terrain vehicle was designed. By integrating the transmission, reducer, differential, parking brake and rear axle into one integrated box, space saving and compact structure, the internal reduction shaft and variable speed output shaft are shorter in length and able to withstand greater torque.
It realizes a smaller structure than ordinary cars, and can withstand greater torque per unit area, improving the driving stability and handling of all-terrain vehicles.
Smart Images
Figure CN222946948U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile transmission system structure, in particular to a rear drive axle system of an all-terrain vehicle. Background Art
[0002] All-terrain vehicles are vehicles that can travel on any terrain and can move freely on terrain that is difficult for ordinary vehicles to maneuver. In my country, they are commonly known as beach buggies or farmer's carts. This type of vehicle has wide tires that can increase the contact area with the ground, generate greater friction and reduce the pressure of the vehicle on the ground, making it easy to travel on beaches, riverbeds, forest roads, streams, and harsh desert terrains.
[0003] The rear axle is a component of the power transmission system of rear-wheel drive vehicles. It consists of two half-bridges that can implement half-bridge differential movement. At the same time, it is also a device used to support the wheels and connect the rear wheels. The transmission of a car is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or step-by-step manner (to achieve variable transmission ratio transmission). The speed reducer of a car is to reduce the speed of the power from the transmission to increase the torque, and drive the drive axle through a pair of conical or cylindrical gears. This component can provide the vehicle with a stronger power output and ensure the stability and performance of the vehicle (reduce the engine speed and achieve fixed transmission ratio transmission).
[0004] The rear axle, transmission, reducer and other components together form the rear drive axle system of the car, which is installed on the chassis. On the one hand, because all-terrain vehicles often travel on rough roads, the working conditions are worse than those of ordinary cars, so the vehicles often have to bear greater torque; on the other hand, because the chassis space of all-terrain vehicles is smaller, the requirements for the size of each component are higher; based on the above two aspects, all-terrain vehicles need a rear drive axle system that is smaller in structure than ordinary cars and can withstand greater torque. Utility Model Content
[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present utility model is to provide a rear drive axle system for an all-terrain vehicle, which is used to solve the problem in the prior art that there is no rear drive axle system for an all-terrain vehicle that is smaller in structure than an ordinary car and can withstand greater torque.
[0006] To achieve the above-mentioned purpose and other related purposes, the utility model provides a rear drive axle system of an all-terrain vehicle, including a transmission, a reducer, a differential, a parking brake and a rear axle; the transmission includes a transmission input shaft and a transmission output shaft; one end of the transmission output shaft is connected to the parking brake, and a fifth gear is installed on the transmission output shaft; the reducer includes a reduction shaft, one end of the reduction shaft is connected to the rear axle through a differential, a reduction gear is connected to the reduction shaft, the reduction gear is meshed with the fifth gear, and the transmission and the reducer are both installed in an integrated box.
[0007] Optionally, the speed change input shaft is connected to a first gear, a synchronizer and a third gear, and the speed change output shaft is also connected to a second gear and a fourth gear; when the transmission is in a high gear, under the action of the synchronizer, the first gear and the second gear are meshed, and the third gear and the fourth gear are disengaged; when the transmission is in a low gear, under the action of the synchronizer, the third gear and the fourth gear are meshed, and the first gear and the second gear are disengaged; when the transmission is in a neutral gear, under the action of the synchronizer, the first gear and the second gear are disengaged, and at the same time, the third gear and the fourth gear are disengaged.
[0008] Optionally, the differential includes a differential bevel gear and a differential plate gear, the differential bevel gear is connected to one end of the reduction shaft, and the differential plate gear is meshed with the differential bevel gear.
[0009] Optionally, the transmission ratio of the high gear is in the range of greater than 22 and less than 24; the transmission ratio of the low gear is greater than 11 and less than 12.
[0010] Optionally, the number of teeth of the first gear is Z1=40, the number of teeth of the second gear is Z2=51, the number of teeth of the third gear is Z3=26, the number of teeth of the fourth gear is Z4=65, the number of teeth of the fifth gear is Z5=23, the number of teeth of the reduction gear is Z6=55, the number of teeth of the differential bevel gear is Z7=10, and the number of teeth of the differential plate gear is Z8=37; the transmission ratio of the low gear is: Z2 / Z1*Z6 / Z5*Z8 / Z7=11.28; the transmission ratio of the high gear is: Z4 / Z3*Z6 / Z5*Z8 / Z7=22.12.
[0011] Optionally, the parking brake is a disc brake.
[0012] Optionally, the other end of the reduction shaft is also connected to the front axle via a universal joint.
[0013] Optionally, the differential is installed in a differential case.
[0014] As described above, the rear drive axle system of an all-terrain vehicle of the present invention has at least the following beneficial effects:
[0015] 1. The rear drive axle system of the all-terrain vehicle is connected to a parking brake through one end of a transmission output shaft, and a fifth gear is installed on the transmission output shaft; one end of the reduction shaft of the reducer is connected to the rear axle through a differential, and a reduction gear is connected to the reduction shaft, and the reduction gear is meshed with the fifth gear. The transmission and the reducer are installed in an integrated box, and the rear axle, the transmission, the parking brake and the reducer are integrated together to form a rear drive axle system. Compared with the original design, space is saved, and the entire rear drive axle system can be more easily installed and arranged on the frame than scattered parts; at the same time, the rear drive axle system with a compact structure has a reduction shaft and a transmission output shaft shorter than the design of the prior art, so it can withstand greater torque per unit area; that is, a rear drive axle system with a smaller structure than that of an ordinary car and a greater torque can be provided.
[0016] 2. The rear drive axle system of the all-terrain vehicle is designed to have a first gear, a synchronizer and a third gear connected to the transmission input shaft, and a second gear and a fourth gear connected to the transmission output shaft, thereby realizing free switching of the three gears of the all-terrain vehicle, namely, high gear, neutral gear and low gear. That is, when the transmission is in high gear, under the action of the synchronizer, the first gear and the second gear are meshed, and the third gear and the fourth gear are disengaged; when the transmission is in low gear, under the action of the synchronizer, the third gear and the fourth gear are meshed, and the first gear and the second gear are disengaged; when the transmission is in neutral gear, under the action of the synchronizer, the first gear and the second gear are disengaged, and the third gear and the fourth gear are disengaged.
[0017] 3. The rear drive axle system of the all-terrain vehicle has a first gear with a tooth number of Z1=40, a second gear with a tooth number of Z2=51, a third gear with a tooth number of Z3=26, a fourth gear with a tooth number of Z4=65, a fifth gear with a tooth number of Z5=23, a reduction gear with a tooth number of Z6=55, a differential bevel gear with a tooth number of Z7=10, and a differential plate gear with a tooth number of Z8=37, so that the transmission ratio of the low gear is: Z2 / Z1*Z6 / Z5*Z8 / Z7=11.28; the transmission ratio of the high gear is: Z4 / Z3*Z6 / Z5*Z8 / Z7=22.12; compared with the existing design in which the common low-speed gear ratio is 10 and the high-speed gear ratio is 20, the transmission ratio of the rear drive axle is more beneficial for climbing, accelerating and overloading, etc., which helps to improve the cruising range of the all-terrain vehicle, reduce motor wear, and have better controllability.
[0018] 4. The rear drive axle system of this all-terrain vehicle is designed with a disc brake through the parking brake. Because all-terrain vehicles often travel on rugged roads, the heat generated by the wheels during braking is higher than that of ordinary cars. Therefore, compared with the use of drum brakes, disc brakes can achieve better heat dissipation effects during braking.
[0019] 5. The rear drive axle system of the all-terrain vehicle is designed to connect the front axle and rear axle of the all-terrain vehicle as a whole by a design in which one end of the reduction shaft is connected to the rear axle by a differential, and the other end of the reduction shaft is connected to the front axle by a universal joint. Compared with the design in which the front axle only plays a supporting role, the rear axle drive system provides a more stable chassis for the all-terrain vehicle, greatly improving the handling of the all-terrain vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Shown is a schematic diagram of a rear drive axle system of an all-terrain vehicle according to the present invention.
[0021] Figure 2 The diagram shows a schematic diagram of a rear drive axle system of an all-terrain vehicle of the present invention equipped with an integrated case and a differential case.
[0022] Component number description
[0023] Transmission 1, first gear 11, second gear 12, third gear 13, fourth gear 14, fifth gear 15, synchronizer 16, speed change input shaft 17, speed change output shaft 18, reducer 2, reduction shaft 21, reduction gear 22, differential 3, differential bevel gear 31, differential plate gear 32, parking brake 4, universal joint 5, integrated box 6, differential box 7. DETAILED DESCRIPTION
[0024] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0025] See also Figure 1 to Figure 2. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.
[0026] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.
[0027] See also Figure 1 and Figure 2 The utility model provides a rear drive axle system of an all-terrain vehicle, comprising a transmission 1, a speed reducer 2, a differential 3, a parking brake 4 and a rear axle; the transmission 1 comprises a speed change input shaft 17 and a speed change output shaft 18; one end of the speed change output shaft 18 is connected to the parking brake 4, and a fifth gear 15 is installed on the speed change output shaft 18; the speed reducer 2 comprises a reduction shaft 21, one end of the reduction shaft 21 is connected to the rear axle through the differential 3, a reduction gear 22 is connected to the reduction shaft 21, and the reduction gear 22 is meshed with the fifth gear 15, the transmission 1 and the speed reducer 2 are all installed in an integrated box 6; this solution integrates the rear axle, the transmission 1, the parking device and the reducer 2 to form a rear drive axle system, which saves space compared with the original design. The entire rear drive axle system can be more easily installed and arranged on the frame than the scattered parts; at the same time, the compact rear drive axle system has a shorter length of the reduction shaft 21 and the speed change output shaft 18 inside the system than the design of the prior art, so it can withstand a larger torque per unit area; that is, it provides a rear drive axle system that is more compact than an ordinary car and can withstand a larger torque.
[0028] In another embodiment, the power mechanism of the all-terrain vehicle uses an electric motor, which drives the speed change input shaft 17 to rotate. Compared with the use of an oil engine, the motor drive mode is more conducive to keeping the vehicle clean and hygienic, and the energy cost is also lower.
[0029] In another embodiment, see Figure 1, the first gear 11, the synchronizer 16 and the third gear 13 are connected to the speed change input shaft 17, and the second gear 12 and the fourth gear 14 are also connected to the speed change output shaft 18; through this scheme, the present embodiment realizes the free switching of the three gears of the all-terrain vehicle, namely, the high gear, the neutral gear and the low gear; that is, when the transmission 1 is in the high gear, under the action of the synchronizer 16, the first gear 11 and the second gear 12 are meshed, and the third gear 13 and the fourth gear 14 are disengaged; when the transmission 1 is in the low gear, under the action of the synchronizer 16, the third gear 13 and the fourth gear 14 are meshed, and the first gear 11 and the second gear 12 are disengaged; when the transmission 1 is in the neutral gear, under the action of the synchronizer 16, the first gear 11 and the second gear 12 are disengaged, and the third gear 13 and the fourth gear 14 are disengaged. The three gear changes are common gear selections for all-terrain vehicles, and the structure and connection of the gear-changing joystick and other components will not be described in detail here.
[0030] In another embodiment, see Figure 1 The differential 3 includes a differential bevel gear 31 and a differential plate gear 32. The differential bevel gear 31 is connected to one end of the reduction shaft 21. The differential plate gear 32 is meshed with the differential bevel gear 31. The specific structure of the differential 3 is given here. The number of teeth of each gear will be designed according to the structure below to obtain a more advantageous transmission ratio.
[0031] In another embodiment, see Figure 1 , the transmission ratio range of the high gear is greater than 22 and less than 24; the transmission ratio of the low gear is greater than 11 and less than 12; more specifically, the number of teeth of the first gear 11 is Z1=40, the number of teeth of the second gear 12 is Z2=51, the number of teeth of the third gear 13 is Z3=26, the number of teeth of the fourth gear 14 is Z4=65, the number of teeth of the fifth gear 15 is Z5=23, the number of teeth of the reduction gear 22 is Z6=55, the number of teeth of the differential bevel gear 31 is Z7=10, the number of teeth of the differential plate gear 32 is Z8=11, and the number of teeth of the differential plate gear 32 is Z9=23. The number is Z8=37; from the number of teeth of the above gears, the transmission ratio of the low gear is: Z2 / Z1*Z6 / Z5*Z8 / Z7=11.28; the transmission ratio of the high gear is: Z4 / Z3*Z6 / Z5*Z8 / Z7=22.12; compared with the existing design of the common low gear ratio of 10 and the high gear ratio of 20, the transmission ratio of the rear drive axle is more beneficial for climbing, accelerating and overloading, etc., which helps to improve the cruising range of the all-terrain vehicle, reduce motor wear, and have better controllability. The technicians can also appropriately change the number of teeth of one or some gears to fine-tune the transmission ratio, which will not be repeated here.
[0032] In another embodiment, see Figure 2The parking brake 4 is a disc brake. Because all-terrain vehicles often travel on rough roads, the heat generated by the wheels during braking is higher than that of ordinary cars. Therefore, compared with drum brakes, disc brakes can achieve better heat dissipation effect during braking.
[0033] In another embodiment, see Figure 2 One end of the reduction shaft 21 is connected to the rear axle by the differential 3, and the other end of the reduction shaft 21 is connected to the front axle by the universal joint 5. The design of this embodiment makes the front axle and the rear axle of the all-terrain vehicle connected as one. Compared with the design in which the front axle only plays a supporting role, the rear axle drive system provides a more stable chassis for the all-terrain vehicle, greatly improving the controllability of the all-terrain vehicle.
[0034] In other embodiments, Figure 2 As shown, the differential 3 is installed in the differential case 7, which makes it easier to install the differential 3 on the vehicle frame.
[0035] In summary, the utility model is connected to the parking brake 4 through one end of the speed change output shaft 18, and the fifth gear 15 is installed on the speed change output shaft 18; one end of the reduction shaft 21 of the reducer 2 is connected to the rear axle through the differential 3, and the reduction shaft 21 is connected to the reduction gear 22, and the reduction gear 22 is meshed with the fifth gear 15, and the transmission 1 and the reducer 2 are installed in an integrated box 6. The design integrates the rear axle, the transmission 1, the parking brake and the reducer 2 to form a rear drive axle system. Compared with the original design, it saves space, and the entire rear drive axle system can be more easily installed and arranged on the frame than the scattered parts; at the same time, the structure The compact rear drive axle system has a shorter length of the reduction shaft 21 and the speed output shaft 18 than the prior art design, so it can withstand greater torque per unit area; that is, it provides a rear drive axle system that is smaller in structure than ordinary cars and can withstand greater torque; at the same time, one end of the reduction shaft 21 is connected to the rear axle by the differential 3, and the other end of the reduction shaft 21 is connected to the front axle by the universal joint 5, so that the front axle and the rear axle of the all-terrain vehicle are connected as one. Compared with the design in which the front axle only plays a supporting role, the rear axle drive system provides a more stable chassis for the all-terrain vehicle, greatly improving the maneuverability of the all-terrain vehicle. Therefore, the utility model effectively overcomes the shortcomings of the prior art and has a high industrial utilization value.
[0036] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.
Claims
1. A rear drive axle system of an all-terrain vehicle, comprising a transmission, a reducer, a differential, a parking brake and a rear axle; the transmission comprises a speed change input shaft and a speed change output shaft, characterized in that: One end of the speed change output shaft is connected to the parking brake, and a fifth gear is installed on the speed change output shaft; The reducer includes a reduction shaft, one end of which is connected to the rear axle through a differential, a reduction gear is connected to the reduction shaft, the reduction gear is meshed with the fifth gear, and the transmission and the reducer are both installed in an integrated box.
2. The rear drive axle system of an all-terrain vehicle according to claim 1, characterized in that: The speed change input shaft is connected to a first gear, a synchronizer and a third gear, and the speed change output shaft is also connected to a second gear and a fourth gear; The transmission is in high gear, and under the action of the synchronizer, the first gear and the second gear are meshed, and the third gear and the fourth gear are disengaged; The transmission is in a low gear, and under the action of the synchronizer, the third gear and the fourth gear are meshed, and the first gear and the second gear are disengaged; The transmission is in neutral, and under the action of the synchronizer, the first gear and the second gear are disengaged, and the third gear and the fourth gear are disengaged.
3. The rear drive axle system of an all-terrain vehicle according to claim 2, characterized in that: The differential comprises a differential bevel gear and a differential plate gear, wherein the differential bevel gear is connected to one end of the reduction shaft, and the differential plate gear is meshed with the differential bevel gear.
4. The rear drive axle system of an all-terrain vehicle according to claim 3, characterized in that: The transmission ratio of the high gear is in the range of greater than 22 and less than 24; the transmission ratio of the low gear is greater than 11 and less than 12.
5. The rear drive axle system of an all-terrain vehicle according to claim 4, characterized in that: The number of teeth of the first gear is Z1=40, the number of teeth of the second gear is Z2=51, the number of teeth of the third gear is Z3=26, the number of teeth of the fourth gear is Z4=65, the number of teeth of the fifth gear is Z5=23, the number of teeth of the reduction gear is Z6=55, the number of teeth of the differential bevel gear is Z7=10, and the number of teeth of the differential plate gear is Z8=37; The transmission ratio of the low gear is: Z2 / Z1*Z6 / Z5*Z8 / Z7=11.28; The transmission ratio of high gear is: Z4 / Z3*Z6 / Z5*Z8 / Z7=22.
12.
6. The rear drive axle system of an all-terrain vehicle according to claim 1, characterized in that: The parking brake is a disc brake.
7. The rear drive axle system of an all-terrain vehicle according to claim 1, characterized in that: The other end of the reduction shaft is also connected to the front axle via a universal joint.
8. The rear drive axle system of an all-terrain vehicle according to claim 1, characterized in that: The differential is installed in a differential case.