A motor layout structure for a range-extended off-road vehicle

Abstract

This utility model discloses a motor layout structure for a range-extended off-road vehicle, relating to the field of new energy vehicle technology. This layout adopts an integrated power transmission design consisting of a single motor (front-mounted or mid-mounted / longitudinal), gearbox, transfer case, and front and rear drive shafts. The transfer case enables torque amplification, dynamic power distribution, and power disconnection. On highways, rear-wheel drive can be switched to reduce energy consumption, while providing precise power control during off-road driving. The battery system is a split design, located on both sides of the transmission system, ensuring a range of approximately 300km while maintaining balanced weight distribution. The range extender adopts a rear-mounted quick-release structure, allowing for flexible installation and removal depending on the scenario, adapting to heavy off-road driving, urban commuting, and long-distance travel needs. This design achieves overall vehicle weight reduction while adding key components, significantly improving off-road capability, energy economy, and maintenance convenience.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, specifically to a motor layout structure for a range-extended off-road vehicle. Background Technology

[0002] Currently, most mainstream new energy off-road vehicles adopt a decoupled four-wheel drive layout with P1 / P3 / P4 motors, which has significant technical shortcomings. Firstly, the concentrated mounting of components such as the motor, battery, and range extender leads to a significant increase in vehicle weight; models like the Tank 500 and Formula Leopard 5 weigh around 3 tons, severely weakening climbing ability, obstacle-crossing agility, and ground clearance adaptability. Secondly, during extreme off-road driving, prolonged motor stalling can trigger overheat protection, causing a sharp drop in performance. Furthermore, after overcoming obstacles, the high torque characteristics of the motor can cause severe tire slippage, resulting in a sudden and enormous reverse impact force, potentially leading to axle breakage. Thirdly, due to the lack of a central driveshaft, power is completely wasted when the front axle is suspended, with power output solely to the rear axle, significantly reducing obstacle-crossing capability. Utility Model Content

[0003] Therefore, this utility model provides a motor layout structure for a range-extended off-road vehicle to solve the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a range-extended off-road vehicle motor layout structure, including a front axle, a rear axle, tires, a motor, a gearbox, a front driveshaft, a transfer case, a differential lock, a range extender, a rear driveshaft, a battery, a discharge line, and a charging line; the motor is connected to the gearbox, the gearbox is connected to the transfer case, the transfer case is connected to the front axle via the front driveshaft, and to the rear axle via the rear driveshaft; the tires are respectively mounted on the front axle and the rear axle; the differential lock is mounted on the rear axle; the battery is placed on both sides of the rear driveshaft; the range extender is located at the rear of the vehicle and has a quick-release structure; the charging line is connected between the range extender and the battery, and the discharge line is connected between the battery and the motor.

[0005] Furthermore, the motor is either front-mounted or center-mounted and is arranged vertically, with the output end of the motor connected to the input end of the gearbox.

[0006] Furthermore, the input end of the transfer case is connected to the output end of the gearbox, the first output end of the transfer case is connected to the input end of the front axle via the front drive shaft, and the second output end of the transfer case is connected to the input end of the rear axle via the rear drive shaft.

[0007] Furthermore, the battery has a split structure, with two sets of batteries symmetrically arranged on both sides of the rear drive shaft.

[0008] Furthermore, the range extender is detachably mounted at the rear of the vehicle, located behind the rear axle.

[0009] Furthermore, the differential lock is integrated into the power output end of the rear axle and connected to the wheel-side drive structure of the rear axle.

[0010] Furthermore, one end of the charging circuit is connected to an external power interface, and the other end is connected to the battery charging interface; one end of the discharging circuit is connected to the battery discharging interface, and the other end is connected to the motor power supply interface.

[0011] Furthermore, the tires are respectively installed at both ends of the front axle and both ends of the rear axle, and the center of the tire rim is connected to the output end of the wheel axle of the front axle and the rear axle.

[0012] Compared with existing technologies, it has the following advantages:

[0013] This range-extended off-road vehicle's motor layout structure, through the adoption of an integrated power transmission design of "single motor, gearbox, transfer case, and front and rear drive shafts," a split battery layout, and a rear-mounted quick-release range extender structure, achieves overall vehicle weight reduction while adding key components such as the gearbox, transfer case, and drive shaft. It completely solves the problems of excessive vehicle weight, poor power controllability in extreme road conditions, and low power distribution efficiency that exist in traditional decoupled four-wheel drive layouts. At the same time, through the flexible installation and removal of the range extender to adapt to different scenario requirements, it ultimately achieves multiple technological breakthroughs in vehicle lightweighting, high passability, low energy consumption, and easy maintenance, significantly improving off-road performance and operating economy. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is a schematic diagram of the motor layout structure of a range-extended off-road vehicle according to the present invention.

[0017] In the diagram: 1. Front axle; 2. Rear axle; 3. Tire; 4. Motor; 5. Gearbox; 6. Front driveshaft; 7. Transfer case; 8. Differential lock; 9. Range extender; 10. Rear driveshaft; 11. Battery; 12. Discharge circuit; 13. Charging circuit. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 As shown, a range-extended off-road vehicle motor layout structure includes a front axle 1, a rear axle 2, tires 3, a motor 4, a gearbox 5, a front driveshaft 6, a transfer case 7, a differential lock 8, a range extender 9, a rear driveshaft 10, a battery 11, a discharge line 12, and a charging line 13. The core power transmission components are arranged along the vehicle's longitudinal centerline, the battery system is symmetrically distributed on both sides of the transmission system, and the range extender is independently located at the rear of the vehicle, forming an overall structural framework of "mid-mounted transmission, symmetrical weight distribution, and rear-mounted range extender," effectively optimizing the vehicle's center of gravity and space utilization. Specific technical solutions are as follows:

[0020] The powertrain system adopts an integrated rigid connection structure consisting of "motor 4, gearbox 5, transfer case 7, front and rear drive shafts, and axle". The specific connection relationships are as follows:

[0021] The motor 4 adopts a front-mounted or mid-mounted longitudinal layout. Its output end is rigidly connected to the input end of the gearbox 5 through a flange. The power output by the motor is transmitted to the input end of the transfer case 7 after the speed ratio is adjusted by the gearbox 5.

[0022] As the core component for power distribution, the transfer case 7 has its first output end connected to the input end of the front axle 1 via the front drive shaft 6, and its second output end connected to the input end of the rear axle 2 via the rear drive shaft 10, thereby realizing the distribution of power between the front and rear axles.

[0023] Tires 3 are installed at both ends of the front axle 1 and the rear axle 2 respectively. The center of the rim of the tire 3 is fixedly connected to the output end of the wheel axle of the front axle 1 and the rear axle 2 through bearings and bolts to ensure that the power is ultimately transmitted to the tire 3 to enable the vehicle to move.

[0024] The transfer case 7 has three core functions, as follows:

[0025] 1. Torque amplification: In off-road scenarios, torque is amplified through internal gear switching, improving the vehicle's ability to get out of trouble;

[0026] 2. Dynamic power distribution: Adjusts the power distribution ratio between the front and rear axles in real time according to road conditions, and can achieve up to 100% power output to a single axle;

[0027] 3. Power disconnection: When driving on ordinary paved roads, the connection between the front drive shaft 6 and the transfer case 7 can be disconnected, and power can be transmitted to the rear axle 2 only through the rear drive shaft 10, switching to rear-wheel drive mode to reduce energy consumption;

[0028] The battery 11 adopts a split design, specifically: two sets of identical batteries 11 are symmetrically arranged on the left and right sides of the gearbox 5, transfer case 7, front drive shaft 6, and rear drive shaft 10, respectively, and are fixedly connected to the chassis longitudinal beams by brackets. This layout keeps the left-right weight distribution error of the vehicle within 5%, effectively improving driving stability and vehicle attitude control during off-road driving.

[0029] Energy transfer from battery 11 is achieved through two independent lines:

[0030] Charging line 13: One end is connected to the external charging interface of the vehicle, and the other end is connected to the charging interface of the battery 11 through a high-voltage wire harness. It can be connected to an external charging pile or household power supply to charge the battery 11.

[0031] Discharge line 12: One end is connected to the discharge interface of battery 11, and the other end is connected to the power supply interface of motor 4 through high voltage controller. It transmits the electrical energy stored in battery 11 to motor 4 to convert it into power, and at the same time supplies power to other electrical components of the vehicle (such as steering and braking systems). The total capacity of the battery system is designed to be 20kWh, which can support a pure electric range of about 300km, meeting the needs of daily urban commuting.

[0032] The range extender 9 adopts a rear-mounted quick-release structure, which can be detachably installed at the rear of the vehicle, behind the rear axle 2, in a reserved mounting position using a special clip and bolt assembly. It is electrically connected to the battery 11 and motor 4 via a quick-connect plug. The quick-release design of the range extender 9 allows for disassembly and assembly within 15 minutes using specialized tools. Specific application scenarios are as follows:

[0033] When engaging in heavy off-roading, removing the range extender 9 can reduce the vehicle's weight by approximately 80kg, lower the vehicle's center of gravity, and improve obstacle-crossing agility.

[0034] During daily urban commuting, after removing the range extender 9, it relies solely on the battery 11 for power to achieve pure electric drive, with energy consumption as low as 15kWh / 100km.

[0035] When traveling long distances, the range extender 9 can be installed to generate electricity from fuel, increasing the combined driving range to over 1000km in hybrid mode.

[0036] The rear axle 2 integrates a differential lock 8, which is connected to the wheel-side drive structure of the rear axle 2 via gear meshing. When one tire 3 slips, the rear axle differential can be locked, ensuring that both tires 3 receive the same torque, significantly improving off-road performance. Furthermore, the longitudinally mounted motor 4 provides ample space for the suspension system, allowing for the adaptation of longer double wishbone suspensions, increasing suspension travel to over 250mm to ensure maximum contact area between the tires 3 and the ground during off-road driving.

[0037] Workflow in different scenarios

[0038] 1. Driving on ordinary paved roads: Transfer case 7 disconnects the front drive shaft 6, and power is transmitted to the rear wheels in sequence through motor 4, gearbox 5, transfer case 7, rear drive shaft 10, and rear axle 2, driving in rear-wheel drive mode; at this time, range extender 9 can be removed, and only battery 11 is used for power supply, and energy consumption is reduced by about 20% compared to four-wheel drive mode.

[0039] 2. Off-road driving scenario: Transfer case 7 switches to four-wheel drive mode and activates torque amplification function, and power is transmitted to front axle 1 and rear axle 2 at the same time; if one tire slips, the rear axle differential lock 8 automatically locks to ensure effective power output; during heavy off-road driving, the range extender 9 is removed to reduce the vehicle weight and improve passability, and the battery 11 continuously supplies power to the motor 4 through the discharge line 12 to ensure stable power output.

[0040] 3. Long-distance driving scenario: Install range extender 9 and switch to hybrid mode. Range extender 9 monitors the battery 11 power level in real time. When the power level is below 20%, it automatically starts generating electricity to replenish the battery 11 through charging line 13, thereby extending the driving range. The transmission 5 automatically adjusts the gear ratio according to the vehicle speed. When driving at high speed, it switches to high gear to reduce the speed of motor 4 and reduce energy consumption.

[0041] In summary, this new layout of the range-extended off-road vehicle solves the problems of excessive weight, low power distribution efficiency, and poor adaptability of traditional new energy off-road vehicles by optimizing the connection relationship of components and spatial arrangement, and achieves the comprehensive technical effect of "lightweight, high passability, low energy consumption, and easy maintenance".

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0043] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A motor layout structure for a range-extended off-road vehicle, characterized in that, The vehicle includes a front axle (1), a rear axle (2), tires (3), a motor (4), a gearbox (5), a front driveshaft (6), a transfer case (7), a differential lock (8), a range extender (9), a rear driveshaft (10), a battery (11), a discharge line (12), and a charging line (13). The motor (4) is connected to the gearbox (5), the gearbox (5) is connected to the transfer case (7), the transfer case (7) is connected to the front axle (1) via the front driveshaft (6), and to the rear axle (2) via the rear driveshaft (10). The differential lock (8) is installed on the rear axle (2). The battery (11) is located on both sides of the rear driveshaft (10). The range extender (9) is located at the rear of the vehicle and has a quick-release structure.

2. The range-extended off-road vehicle motor layout structure according to claim 1, characterized in that, The motor (4) is located in the front or middle position and is arranged vertically. The output end of the motor (4) is connected to the input end of the gearbox (5).

3. The motor layout structure for a range-extended off-road vehicle according to claim 1, characterized in that, The input end of the transfer case (7) is connected to the output end of the gearbox (5). The first output end of the transfer case (7) is connected to the input end of the front axle (1) through the front drive shaft (6). The second output end of the transfer case (7) is connected to the input end of the rear axle (2) through the rear drive shaft (10).

4. The motor layout structure for a range-extended off-road vehicle according to claim 1, characterized in that, The battery (11) has a split structure, with two sets of batteries (11) symmetrically arranged on both sides of the rear drive shaft (10).

5. The range-extended off-road vehicle motor layout structure according to claim 1, characterized in that, The range extender (9) is detachably mounted at the rear of the vehicle, behind the rear axle (2).

6. The motor layout structure for a range-extended off-road vehicle according to claim 1, characterized in that, The differential lock (8) is integrated into the power output end of the rear axle (2) and is connected to the wheel-side transmission structure of the rear axle (2).

7. The range-extended off-road vehicle motor layout structure according to claim 1, characterized in that, One end of the charging line (13) is connected to an external power interface, and the other end is connected to the charging interface of the battery (11); one end of the discharging line (12) is connected to the discharging interface of the battery (11), and the other end is connected to the power supply interface of the motor (4).

8. The motor layout structure for a range-extended off-road vehicle according to claim 1, characterized in that, The tires (3) are respectively installed at both ends of the front axle (1) and the two ends of the rear axle (2), and the rim center of the tires (3) is connected to the axle output ends of the front axle (1) and the rear axle (2).

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