A two-gear electric drive axle for a tractor and a method of using the same and a tractor

Abstract

The application provides a two-gear electric drive axle for a tractor, a use method of the two-gear electric drive axle and the tractor. The two-gear electric drive axle for the tractor comprises a motor, a first clutch, a second clutch, a planetary mechanism, a differential and a tire, the motor, the second clutch and the first clutch are coaxially arranged, the motor is in transmission connection with the first clutch and the second clutch respectively, the first clutch is in transmission connection with the planetary mechanism, the planetary mechanism and the second clutch are in transmission connection with the differential, and the differential is in transmission connection with the tire.

Description

Technical Field

[0001] This invention relates to the field of electric drive axle technology, and more particularly to a 2-speed electric drive axle for tractors, its method of use, and the tractor itself. Background Technology

[0002] Currently, agricultural electric tractors typically use a mid-mounted single or multiple motors, employing a single- or multi-speed mechanical gearbox to transmit power to the rear and front axles. This design results in a large, costly transmission box with poor integration. In the automotive industry, electric drive axles often use a single-speed parallel shaft arrangement, failing to fully utilize the space on both sides of the axle tubes. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a 2-speed electric drive axle for tractors, a method of using the axle, and a tractor.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A 2-speed electric drive axle for a tractor includes: a motor, a first clutch, a second clutch, a planetary mechanism, a differential, and a tire. The motor, the second clutch, and the first clutch are coaxially integrated. The motor is drivenly connected to the first clutch and the second clutch respectively. The first clutch is drivenly connected to the planetary mechanism. The planetary mechanism and the second clutch are both drivenly connected to the differential. The differential is drivenly connected to the tire.

[0005] The beneficial effects of adopting the technical solution of this invention are as follows: A motor and two clutches are integrated coaxially on the drive axle, making full use of the space on both sides of the axle tubes while providing two power shifts, allowing the drive axle to handle both heavy-duty operations and high-speed driving conditions. The coaxial integrated arrangement results in fewer gears than parallel-shaft arrangements, leading to a smaller drive axle size, suitable for scenarios with limited installation space on tractor drive axles. In the first state, the motor's torque is increased after a single-stage planetary reduction gear, suitable for heavy-duty operations. In the second state, the motor directly drives the differential without reduction gearing, suitable for high-speed driving conditions.

[0006] Furthermore, both the first clutch and the second clutch are wet clutches.

[0007] The beneficial effects of adopting the above-mentioned further technical solution are: using a wet clutch facilitates oil cooling of the clutch, resulting in smoother and gentler power transmission and extending service life. On the drive axle, a motor and two wet clutches are integrated in a coaxial arrangement, making full use of the space on both sides of the axle tubes while providing two power shifting modes, enabling the drive axle to handle both heavy-duty operations and high-speed driving conditions.

[0008] Furthermore, the housing of the second clutch is connected in a driving connection with the friction plate of the first clutch.

[0009] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the transmission of power through the housing of the second clutch to the friction plates of the first clutch.

[0010] Furthermore, the planetary mechanism includes a planet carrier and a sun gear, the first clutch is drivenly connected to the sun gear, the sun gear is drivenly connected to the planet carrier, and both the planet carrier and the second clutch are drivenly connected to the housing of the differential.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are: it facilitates the transmission of power to the sun gear of the planetary mechanism via the first clutch, and the output of power to the differential housing via the planet carrier of the planetary mechanism. It also facilitates the direct output of power to the differential housing via the second clutch.

[0012] Furthermore, the differential is connected to the tire drive via the left and right half-shafts.

[0013] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the distribution of power from the differential to the left and right half-shafts, and facilitates the electric drive axle to drive the tires.

[0014] Furthermore, the left and right half-shafts are respectively connected to the tire drive via wheel-side reduction planetary transmissions.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the transmission of power to the tires after passing through the wheel-side reduction planetary system.

[0016] Furthermore, steering knuckles are respectively provided on the left and right half shafts.

[0017] The beneficial effects of adopting the above-mentioned further technical solutions are: It facilitates the transmission of power to the tires after passing through the wheel-side steering knuckles and wheel-side reduction planetary gears. The omission or addition of steering knuckles allows the electric drive axle to have both steering drive axles and non-steering drive axles. This allows for selection of whether to add steering knuckles based on actual needs, improving applicability.

[0018] In addition, the present invention also provides a tractor including the above-mentioned two-speed electric drive axle for a tractor.

[0019] In addition, the present invention also provides a method of using a 2-speed electric drive axle for a tractor. Based on the above-mentioned 2-speed electric drive axle for a tractor, the method of using the 2-speed electric drive axle for a tractor includes: in a first state, engaging a first clutch, so that power is transmitted from the motor, through the first clutch to the planetary mechanism, through the planetary mechanism to the differential, and through the differential to the tires; in a second state, engaging a second clutch, so that power is transmitted from the motor, through the second clutch to the differential, and through the differential to the tires.

[0020] The beneficial effects of adopting the technical solution of this invention are as follows: A motor and two clutches are integrated coaxially on the drive axle, making full use of the space on both sides of the axle tubes while providing two power shifts, allowing the drive axle to handle both heavy-duty operations and high-speed driving conditions. The coaxial integrated arrangement results in fewer gears than parallel-shaft arrangements, leading to a smaller drive axle size, suitable for scenarios with limited installation space on tractor drive axles. In the first state, the motor's torque is increased after a single-stage planetary reduction gear, suitable for heavy-duty operations. In the second state, the motor directly drives the differential without reduction gearing, suitable for high-speed driving conditions.

[0021] Furthermore, in the first state, the first clutch is engaged, allowing power to be transmitted from the motor, through the housing of the second clutch to the friction plates of the first clutch, through the first clutch to the sun gear of the planetary mechanism, through the planet carrier of the planetary mechanism to the housing of the differential, and then distributed to the left and right half-shafts by the differential before being transmitted to the wheel-side reduction planets, and finally to the tires by the wheel-side reduction planets; in the second state, the second clutch is engaged, allowing power to be transmitted from the motor, through the second clutch directly to the housing of the differential, and then distributed to the left and right half-shafts by the differential before being transmitted to the wheel-side reduction planets, and finally to the tires by the wheel-side reduction planets.

[0022] The beneficial effects of adopting the above-mentioned further technical solutions are: simplifying the power transmission route, facilitating operation, and improving user experience.

[0023] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is one of the structural schematic diagrams of a 2-speed electric drive axle for a tractor provided in an embodiment of the present invention.

[0026] Figure 2 This is the second schematic diagram of the structure of a 2-speed electric drive axle for a tractor provided in an embodiment of the present invention.

[0027] Figure 3 The third schematic diagram of the structure of the 2-speed electric drive axle for a tractor provided in the embodiment of the present invention.

[0028] The following are the symbols and their meanings: 1. Motor; 2. First clutch; 3. Second clutch; 4. Planetary gear mechanism; 5. Differential; 6. Tire; 7. Wheel-side reduction planetary gear; 8. Steering knuckle. Detailed Implementation

[0029] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments described are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0034] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0035] like Figures 1 to 3 As shown, an embodiment of the present invention provides a 2-speed electric drive axle for a tractor, comprising: a motor 1, a first clutch 2, a second clutch 3, a planetary mechanism 4, a differential 5, and a tire 6. The motor 1, the second clutch 3, and the first clutch 2 are coaxially integrated. The motor 1 is drivenly connected to the first clutch 2 and the second clutch 3 respectively. The first clutch 2 is drivenly connected to the planetary mechanism 4. The planetary mechanism 4 and the second clutch 3 are both drivenly connected to the differential 5. The differential 5 is drivenly connected to the tire 6.

[0036] The beneficial effects of adopting the technical solution of this invention are as follows: A motor and two clutches are integrated coaxially on the drive axle, making full use of the space on both sides of the axle tubes while providing two power shifts, allowing the drive axle to handle both heavy-duty operations and high-speed driving conditions. The coaxial integrated arrangement results in fewer gears than parallel-shaft arrangements, leading to a smaller drive axle size, suitable for scenarios with limited installation space on tractor drive axles. In the first state, the motor's torque is increased after a single-stage planetary reduction gear, suitable for heavy-duty operations. In the second state, the motor directly drives the differential without reduction gearing, suitable for high-speed driving conditions.

[0037] The technical approach of this invention integrates a motor and two wet clutches (a first clutch and a second clutch) coaxially on the drive axle. This fully utilizes the space on both sides of the axle tubes while providing two power shifting gears, allowing the drive axle (electric drive axle) to handle both heavy-duty operations and high-speed driving conditions. It is available in both steering and non-steering drive axle forms.

[0038] Furthermore, both the first clutch 2 and the second clutch 3 are wet clutches.

[0039] The beneficial effects of adopting the above-mentioned further technical solution are: using a wet clutch facilitates oil cooling of the clutch, resulting in smoother and gentler power transmission and extending service life. On the drive axle, a motor and two wet clutches are integrated in a coaxial arrangement, making full use of the space on both sides of the axle tubes while providing two power shifting modes, enabling the drive axle to handle both heavy-duty operations and high-speed driving conditions.

[0040] like Figures 1 to 3 As shown, the housing of the second clutch 3 is further connected to the friction plate of the first clutch 2 in a transmission connection.

[0041] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the transmission of power through the housing of the second clutch to the friction plates of the first clutch.

[0042] like Figures 1 to 3 As shown, the planetary mechanism 4 further includes a planet carrier and a sun gear. The first clutch 2 is driven to the sun gear, the sun gear is driven to the planet carrier, and the planet carrier and the second clutch 3 are both driven to the housing of the differential 5.

[0043] The beneficial effects of adopting the above-mentioned further technical solution are: it facilitates the transmission of power to the sun gear of the planetary mechanism via the first clutch, and the output of power to the differential housing via the planet carrier of the planetary mechanism. It also facilitates the direct output of power to the differential housing via the second clutch.

[0044] like Figures 1 to 3 As shown, the differential 5 is further connected to the tire 6 via the left and right half-shafts.

[0045] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the distribution of power from the differential to the left and right half-shafts, and facilitates the electric drive axle to drive the tires.

[0046] like Figures 1 to 3 As shown, further, the left and right half shafts are connected to the tires 6 via wheel-side reduction planetary 7.

[0047] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the transmission of power to the tires after passing through the wheel-side reduction planetary system.

[0048] like Figures 2 to 3 As shown, steering knuckles 8 are further provided on the left and right half shafts respectively.

[0049] The beneficial effects of adopting the above-mentioned further technical solutions are: It facilitates the transmission of power to the tires after passing through the wheel-side steering knuckles and wheel-side reduction planetary gears. The omission or addition of steering knuckles allows the electric drive axle to have both steering drive axles and non-steering drive axles. This allows for selection of whether to add steering knuckles based on actual needs, improving applicability.

[0050] The left and right half-axles refer to the left and right half-axles, which are used to connect the left and right tires, respectively.

[0051] In addition, the present invention also provides a tractor including the above-mentioned two-speed electric drive axle for a tractor.

[0052] In addition, the present invention also provides a method of using a 2-speed electric drive axle for a tractor. Based on the above-mentioned 2-speed electric drive axle for a tractor, the method of using the 2-speed electric drive axle for a tractor includes: in a first state, engaging a first clutch, so that power is transmitted from the motor, through the first clutch to the planetary mechanism, through the planetary mechanism to the differential, and through the differential to the tires; in a second state, engaging a second clutch, so that power is transmitted from the motor, through the second clutch to the differential, and through the differential to the tires.

[0053] The beneficial effects of adopting the technical solution of this invention are as follows: A motor and two clutches are integrated coaxially on the drive axle, making full use of the space on both sides of the axle tubes while providing two power shifts, allowing the drive axle to handle both heavy-duty operations and high-speed driving conditions. The coaxial integrated arrangement results in fewer gears than parallel-shaft arrangements, leading to a smaller drive axle size, suitable for scenarios with limited installation space on tractor drive axles. In the first state, the motor's torque is increased after a single-stage planetary reduction gear, suitable for heavy-duty operations. In the second state, the motor directly drives the differential without reduction gearing, suitable for high-speed driving conditions.

[0054] Furthermore, in the first state, the first clutch is engaged, allowing power to be transmitted from the motor, through the housing of the second clutch to the friction plates of the first clutch, through the first clutch to the sun gear of the planetary mechanism, through the planet carrier of the planetary mechanism to the housing of the differential, and then distributed to the left and right half-shafts by the differential before being transmitted to the wheel-side reduction planets, and finally to the tires by the wheel-side reduction planets; in the second state, the second clutch is engaged, allowing power to be transmitted from the motor, through the second clutch directly to the housing of the differential, and then distributed to the left and right half-shafts by the differential before being transmitted to the wheel-side reduction planets, and finally to the tires by the wheel-side reduction planets.

[0055] The beneficial effects of adopting the above-mentioned further technical solutions are: simplifying the power transmission route, facilitating operation, and improving user experience.

[0056] This invention provides a 2-speed electric drive axle for tractors, which is a highly integrated 2-speed electric drive axle with coaxial arrangement, suitable for scenarios where tractor drive axle installation space is limited. It also provides two power shift modes, allowing the drive axle to handle both heavy-duty operations and high-speed driving conditions. It is available in both steering and non-steering drive axle forms.

[0057] like Figure 2 As shown, Figure 2 The bold line in the diagram represents the power transmission path. When the wet clutch C1 (first clutch) engages and the drive axle (electric drive axle) is in low gear (first state), the power transmission route is as follows:

[0058] Power is transmitted from the motor, through the housing of clutch C2 (second clutch) to the friction plates of clutch C1 (first clutch), through clutch C1 (first clutch) to the sun gear of the planetary mechanism, and output from the planet carrier of the planetary mechanism to the housing of the differential. The differential distributes power to the left and right half shafts, and after passing through the steering knuckles and the planetary deceleration planets at the wheel ends, it is transmitted to the tires for output.

[0059] In this gear, the motor torque is increased after passing through a single-stage planetary reduction gear, making it suitable for heavy-duty operation conditions.

[0060] like Figure 3 As shown, Figure 3 The bold line in the diagram represents the power transmission path. When the wet clutch C2 (second clutch) engages and the drive axle (electric drive axle) is in high gear, the power transmission route is as follows:

[0061] Power is transmitted from the motor and directly output to the differential housing through clutch C2 (second clutch). The differential distributes power to the left and right half shafts, and after passing through the steering knuckles and planetary deceleration devices at the wheel ends, it is transmitted to the tires for output.

[0062] In this gear, the motor directly drives the differential without deceleration, making it suitable for high-speed driving conditions.

[0063] The coaxial integrated arrangement has fewer gears than the parallel shaft arrangement, resulting in a smaller drive axle size. It also provides two-speed power shifting, enabling the drive axle to handle both heavy-duty operations and high-speed driving conditions.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-gear electric drive axle for a tractor, characterized in that, The application relates to a 2-gear electric drive axle for a tractor, which comprises a motor, a first clutch, a second clutch, a planetary mechanism, a differential and tires, wherein the motor, the second clutch and the first clutch are coaxially integrated, the motor is in transmission connection with the first clutch and the second clutch respectively, the first clutch is in transmission connection with the planetary mechanism, the planetary mechanism and the second clutch are both in transmission connection with the differential, the differential is in transmission connection with the tires, the first clutch and the second clutch are both wet clutches, the shell of the second clutch is in transmission connection with the friction plate of the first clutch, the planetary mechanism comprises a carrier and a sun gear, the first clutch is in transmission connection with the sun gear, the sun gear is in transmission connection with the carrier, the carrier and the second clutch are both in transmission connection with the shell of the differential, the differential is in transmission connection with the tires through left and right half shafts, the left and right half shafts are in transmission connection with the tires through wheel edge reduction planets respectively, and steering knuckles are arranged on the left and right half shafts. The application relates to a 2-gear electric drive axle for a tractor.

2. A tractor characterised in that, The application relates to a 2-gear electric drive axle for a tractor.

3. A method of using a two-speed electrically driven axle for a tractor, characterized in that, In the first state, the first clutch is combined, power is transmitted from the motor, transmitted to the planetary mechanism through the first clutch, transmitted to the differential by the planetary mechanism, and transmitted to the tires by the differential. In the second state, the second clutch is combined, power is transmitted from the motor, transmitted to the differential through the second clutch, and transmitted to the tires by the differential. In the first state, the first clutch is combined, power is transmitted from the motor, transmitted to the friction plate of the first clutch through the shell of the second clutch, transmitted to the sun gear of the planetary mechanism through the first clutch, transmitted to the shell of the differential by the carrier of the planetary mechanism, distributed to the left and right half shafts by the differential, transmitted to the wheel edge reduction planets, and transmitted to the tires by the wheel edge reduction planets. In the second state, the second clutch is combined, power is transmitted from the motor, directly transmitted to the shell of the differential through the second clutch, distributed to the left and right half shafts by the differential, transmitted to the wheel edge reduction planets, and transmitted to the tires by the wheel edge reduction planets. ​

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