Longitudinal four-wheel-drive electric driving system

Abstract

The utility model discloses a longitudinally-arranged four-wheel-drive electric driving system which comprises a motor, the motor comprises a motor output shaft, the motor output shaft is connected with a planetary system in a meshed mode, the planetary system comprises a planetary carrier, a PTO output shaft is arranged in the motor output shaft, a disengaging mechanism is arranged between the PTO output shaft and the planetary carrier, the PTO output shaft is connected with a differential mechanism assembly, and the differential mechanism assembly is connected with the planetary carrier. The longitudinally-arranged four-wheel-drive electric drive system is simple in structure and convenient to arrange spatially.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile transmission, and in particular relates to a longitudinal four-wheel drive electric drive system. Background Art

[0002] Most existing vehicles use wheel-side motors or two sets of electric drive system assemblies to achieve their four-wheel drive function, which makes the drive system too complicated and the component integration low, resulting in limited structural space in the vehicle.

[0003] Utility model patent publication number CN219969392U, published on November 7, 2023, discloses a vehicle power system and vehicle. The power system includes: an engine, disposed longitudinally; a first motor, disposed longitudinally; a second motor; a clutch, disposed between the engine and the first motor to selectively couple the engine and the first motor; a first differential, drivingly connected to the first motor; and a second differential, drivingly connected to the second motor. This vehicle power system also fails to address the aforementioned technical issues. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art and to provide a longitudinal four-wheel drive electric drive system with a simple structure and convenient spatial arrangement.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The longitudinal four-wheel drive electric drive system includes a motor, the motor includes a motor output shaft, the motor output shaft is meshed and connected with a planetary system, the planetary system includes a planetary carrier, a PTO output shaft is provided in the motor output shaft, a disengagement mechanism is provided between the PTO output shaft and the planetary carrier, and the PTO output shaft is connected to a differential assembly.

[0007] The disengagement mechanism includes a sliding gear sleeve, which is arranged on the PTO output shaft. The end of the planetary carrier is provided with a coupling tooth, and the sliding gear sleeve is located on one side of the coupling tooth.

[0008] A first bevel gear is provided at one end of the PTO output shaft, and the differential assembly includes a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0009] A sun gear is provided at one end of the motor output shaft, and the planetary system further comprises planetary gears, the sun gear is meshed with the planetary gears, an inner gear ring is provided on the outside of the planetary carrier, and the inner gear ring is meshed with the planetary gears.

[0010] The other end of the PTO output shaft is provided with an electromagnetic clutch.

[0011] The PTO output shaft is coaxially arranged with the motor output shaft, and the PTO output shaft passes through the motor output shaft.

[0012] A parking ratchet is provided on the motor output shaft.

[0013] The technical effects of the utility model are as follows: the longitudinal four-wheel drive electric drive system of the utility model is adopted, and the use cost of the transfer case and space are saved through a set of electric drive systems; the structure is compact, the integration is high, the overall size is small, and the space layout is easy; the four-wheel drive function is realized through the power transmission at both ends of the PTO output shaft; a disengagement mechanism is set between the motor and the PTO output shaft to meet the power disconnection requirement between the motor and the wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] This manual includes the following drawings, which show the following contents:

[0015] Figure 1 It is a structural diagram of the longitudinal four-wheel drive electric drive system of the present utility model.

[0016] The markings in the figure are: 1. Motor; 2. Motor output shaft; 3. Parking ratchet; 4. Sun gear; 5. Planetary system; 6. Ring gear; 7. Coupling gear; 8. Sliding gear sleeve; 9. First bevel gear; 10. Second bevel gear; 11. Differential assembly; 12. PTO output shaft; 13. Electromagnetic clutch; 14. Planetary gear; 15. Planet carrier. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0018] like Figure 1 As shown, the longitudinal four-wheel drive electric drive system includes a motor 1, the motor 1 includes a motor output shaft 2, the motor output shaft 2 is meshed with a planetary system 5, the planetary system 5 includes a planetary carrier 15, a PTO output shaft 12 is provided in the motor output shaft 2, a disengagement mechanism is provided between the PTO output shaft 12 and the planetary carrier 15, and the PTO output shaft 12 is connected to a differential assembly 11.

[0019] This electric drive system utilizes a single motor 1 arranged longitudinally, with the PTO output shaft 12 concentrically arranged with the motor output shaft 2. The sun gear 4 outputs power from the motor 1, which is then transferred via the planetary carrier 15 of the planetary system 5. A dog-tooth synchronizer is used between the planetary carrier 15 and the PTO output shaft 12. The planetary carrier 15 is equipped with engaging teeth 7, which can be used to engage and disengage the power from the motor 1 by changing the position of the sliding gear sleeve 8. A bevel gear is positioned at one end of the PTO output shaft 12, which transmits power to the differential assembly 11 through meshing transmission. The differential then outputs the power to the first drive axle. The other end of the PTO output shaft 12 features a spline feature that connects to the electromagnetic clutch 13, further transferring power to the second drive axle.

[0020] like Figure 1 As shown, the disengagement mechanism includes a sliding gear sleeve 8, which is mounted on the PTO output shaft 12. A coupling tooth 7 is provided at the end of the planetary carrier 15, and the sliding gear sleeve 8 is located on one side of the coupling tooth 7. The engagement and disengagement of the sliding gear sleeve 8 with the coupling tooth 7 can achieve power transmission and interruption, disconnecting the power between the motor 1 and the four wheels. Disconnecting the power when towing can prevent damage to the motor 1.

[0021] like Figure 1 As shown, a first bevel gear 9 is provided at one end of the PTO output shaft 12, and a second bevel gear 10 is included in the differential assembly 11. The first bevel gear 9 and the second bevel gear 10 mesh together. The second-stage transmission of the motor output shaft 2 uses a pair of bevel gears, which changes the transmission direction and achieves a 90-degree reversal of power transmission. The bevel gear transmission structure is compact and small, making it easier to install and arrange, saving space.

[0022] like Figure 1 As shown, a sun gear 4 is provided at one end of the motor output shaft 2, and a planetary system 5 further includes planetary gears 14, which mesh with the sun gear 4 and the planetary gears 14. An inner ring gear 6 is provided on the exterior of the planetary carrier 15, which meshes with the planetary gears 14. The first-stage transmission of the motor output shaft 2 adopts a planetary gear structure, which can ensure that the input shaft and output shaft are on the same axis. This ensures that the power axis does not change during power transmission, which helps to reduce the space occupied by the entire system and make the spatial structure more compact.

[0023] like Figure 1 As shown, an electromagnetic clutch 13 is installed at the other end of the PTO output shaft 12. This electromagnetic clutch 13 controls the interruption of power output to the second drive axle, enabling switching between four-wheel drive and two-wheel drive according to the vehicle's actual needs. Two power output ports are formed at both ends of the PTO output shaft 12, enabling four-wheel drive output without a transfer case, reducing space requirements.

[0024] like Figure 1As shown, the PTO output shaft 12 is coaxially arranged with the motor output shaft 2, and the PTO output shaft 12 passes through the motor output shaft 2. The motor output shaft 2 is a hollow structure. Passing the PTO output shaft 12 through the motor output shaft 2 and arranging the two coaxially helps to simplify the transmission chain, reduce the number of parts, effectively free up chassis space, and facilitate vehicle layout. The coaxial electric bridge has a compact structure and a lightweight effect, which helps reduce the overall weight of the vehicle, thereby improving fuel efficiency and performance.

[0025] like Figure 1 As shown, a parking ratchet 3 is provided on the motor output shaft 2. The parking ratchet 3 is provided so as to engage the P gear when the vehicle is parked.

[0026] The power transmission route of the first drive axle: the power of motor 1 is decelerated by the planetary gear set, and then transmitted to the PTO output shaft 12 by the dog gear synchronizer. After being decelerated by a pair of bevel gears, the power is output to the differential assembly 11, and finally the differential assembly 11 outputs the power to the half shaft of the first drive axle.

[0027] The power transmission route of the second drive axle: After the power of motor 1 is decelerated by the planetary gear set, the dog gear synchronizer transmits the power to the PTO output shaft 12. The PTO output shaft 12 is connected to the drive shaft through a spline, and the power is transmitted to the main reducer of the second drive axle through the drive shaft.

[0028] This longitudinal four-wheel drive electric drive system uses a set of electric drive systems to eliminate the use cost of the transfer case and save space; it has a compact structure, high integration, small overall size, and is easy to arrange in space. It realizes the four-wheel drive function through power transmission at both ends of the PTO output shaft 12; a disengagement mechanism is set between the motor 1 and the PTO output shaft 12 to meet the power disconnection requirement between the motor 1 and the wheel.

[0029] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A longitudinal four-wheel drive electric drive system, characterized by: The invention comprises a motor (1), wherein the motor (1) comprises a motor output shaft (2), wherein the motor output shaft (2) is meshedly connected with a planetary system (5), wherein the planetary system (5) comprises a planetary carrier (15), wherein a PTO output shaft (12) is provided inside the motor output shaft (2), wherein a disengagement mechanism is provided between the PTO output shaft (12) and the planetary carrier (15), and wherein the PTO output shaft (12) is connected with a differential assembly (11).

2. The longitudinal four-wheel drive electric drive system according to claim 1, characterized in that: The disengagement mechanism comprises a sliding gear sleeve (8), the sliding gear sleeve (8) is provided on the PTO output shaft (12), the end of the planetary carrier (15) is provided with a coupling tooth (7), and the sliding gear sleeve (8) is located on one side of the coupling tooth (7).

3. The longitudinal four-wheel drive electric drive system according to claim 2, characterized in that: A first bevel gear (9) is provided at one end of the PTO output shaft (12), and the differential assembly (11) includes a second bevel gear (10), and the first bevel gear (9) and the second bevel gear (10) are meshed.

4. The longitudinal four-wheel drive electric drive system according to claim 3, characterized in that: A sun gear (4) is provided at one end of the motor output shaft (2), the planetary system (5) further comprises planetary gears (14), the sun gear (4) is meshed with the planetary gears (14), an inner gear ring (6) is provided on the outside of the planetary carrier (15), and the inner gear ring (6) is meshed with the planetary gears (14).

5. The longitudinal four-wheel drive electric drive system according to claim 4, characterized in that: An electromagnetic clutch (13) is provided at the other end of the PTO output shaft (12).

6. The longitudinal four-wheel drive electric drive system according to claim 5, characterized in that: The PTO output shaft (12) is coaxially arranged with the motor output shaft (2), and the PTO output shaft (12) passes through the motor output shaft (2).

7. The longitudinal four-wheel drive electric drive system according to claim 1, characterized in that: A parking ratchet (3) is provided on the motor output shaft (2).

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