Power-interruption-free integrated double-motor two-gear electric drive axle assembly

Abstract

The utility model provides a power-interruption-free integrated dual-motor two-gear electric drive axle assembly which comprises transmissions and driving motors which are independently arranged, the transmissions are divided into a first transmission and a second transmission which are symmetrically distributed front and back, and the driving motors are divided into a first driving motor and a second driving motor which are symmetrically distributed front and back; the power of the first driving motor and the power of the second driving motor are coupled to the differential mechanism assembly, multiple power modes are formed according to different gears, and one motor is always kept in a working state during gear shifting, so that the power is not interrupted in the gear shifting process, and the comfort of a power system is guaranteed. The planetary gear is used on the input shaft for gear shifting, compared with a conventional gear shifting gear, the whole power system is more compact in the axial space, and space arrangement of a whole vehicle matched with an air bag vehicle model is facilitated. According to the power-interruption-free integrated type double-motor two-gear electric drive axle assembly, a power system can be integrated on the whole axle, the overall design integration degree is high, and reliability is good.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle transmission technology, and relates to electric drive axles, mainly to an integrated dual-motor two-speed electric drive axle assembly with uninterrupted power. Background Technology

[0002] With the introduction of the national carbon neutrality policy, accelerating the low-carbon transformation of commercial vehicles is the key to the automotive industry in implementing the relevant national strategic goals. Therefore, pure electric vehicles have broad market prospects. Currently, due to limitations in driving range and charging issues, the promotion of electrification in commercial vehicles lags significantly behind that of passenger vehicles.

[0003] With the development of pure electric vehicles, electric drive axles are becoming increasingly prevalent in the electric vehicle market. Electric drive axles require high speeds for high-speed cruising and high torque for heavy-load starts or hill climbs. If a single-motor drive axle is used, the motor cannot maintain its high-efficiency range for extended periods, resulting in a shorter driving range. Furthermore, such motors often have higher power and cost.

[0004] In addition, most dual-motor drive axles experience power interruption during gear shifts, and due to their excessively long axial dimensions, they cannot be matched with various vehicle models. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose an integrated dual-motor two-speed electric drive axle assembly with uninterrupted power to solve the technical problem of power interruption during gear shifting in the existing technology.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An integrated dual-motor two-speed electric drive axle assembly with uninterrupted power includes an independently configured transmission and a drive motor. The transmission is divided into a first transmission and a second transmission symmetrically distributed front and rear, and the drive motor is divided into a first drive motor and a second drive motor symmetrically distributed front and rear.

[0008] The first transmission includes a first input shaft and a main reduction gear. One end of the first input shaft is connected to a first drive motor, and the main reduction gear is connected to the differential housing in the differential assembly.

[0009] The second transmission includes a second input shaft and a main reduction gear. One end of the second input shaft is connected to the second drive motor, and the main reduction gear is connected to the differential housing in the differential assembly.

[0010] This utility model also has the following technical features:

[0011] The other end of the first input shaft is connected with a first planetary gear, the first planetary gear is connected with one end of a first intermediate shaft, a first secondary driving gear is installed on the other end of the first intermediate shaft, the first secondary driving gear is engaged with a first secondary driven gear, the first secondary driven gear is fixedly connected with one end of a first output shaft, a first tertiary driving gear is installed on the other end of the first output shaft, and the first tertiary driving gear is engaged with a main reduction gear.

[0012] The other end of the second input shaft is connected with a second planetary gear, the second planetary gear is connected with one end of a second intermediate shaft, a second secondary driving gear is installed on the other end of the second intermediate shaft, the second secondary driving gear is engaged with a second secondary driven gear, the second secondary driven gear is fixedly connected with one end of a second output shaft, a second tertiary driving gear is installed on the other end of the second output shaft, and the second tertiary driving gear is engaged with the main reduction gear.

[0013] The first planetary gear comprises a first ring gear, a first sun gear, a first planetary gear and a first planetary carrier.

[0014] The second planetary gear comprises a second ring gear, a second sun gear, a second planetary gear and a second planetary carrier.

[0015] The other end of the first input shaft is connected with the first sun gear in the first planetary gear.

[0016] The other end of the second input shaft is connected with the second sun gear in the second planetary gear.

[0017] One end of the first intermediate shaft is connected with the first planetary carrier in the first planetary gear.

[0018] One end of the second intermediate shaft is connected with the second planetary carrier in the second planetary gear.

[0019] The first transmission further comprises a first housing fixing plate and a first shift sleeve.

[0020] The second transmission further comprises a second housing fixing plate and a second shift sleeve.

[0021] The first shift sleeve can be separately or combined with the first ring gear, the first housing fixing plate and the first planetary carrier in spline engagement.

[0022] The second shift sleeve can be separately or combined with the second ring gear, the second housing fixing plate and the second planetary carrier in spline engagement.

[0023] The differential assembly is connected with wheels through half shafts.

[0024] Compared with the prior art, the utility model has the following beneficial technical effects:

[0025] (I) The utility model provides a kind of power uninterrupted integrated double-motor two-gear electric drive axle assembly, power is coupled on differential by symmetrical distribution of double-motor, according to different gear position, form multiple power mode, and there is always a motor in working condition when shifting, power uninterrupted in shifting process, ensure the comfort of power system.

[0026] (II) The double-motor structure proposed in the utility model can select same motor, according to program control to realize that power is provided by front and rear motors when intermittent high-speed operation, which is beneficial to improve the overall power system life;Two motors with different parameters can also be selected, by adjusting the speed ratio, ensure that the two motors are always in high-efficiency zone when the vehicle power is running at high speed, further improve the economy of power system.

[0027] (III) The highest gear of front and rear side gearboxes proposed in the utility model is direct gear and two-stage transmission, and the overall transmission efficiency is high, compared with conventional direct gear, the vehicle economy can be effectively improved when running at high speed;The first gear is three-stage transmission, which can realize large speed ratio, reduce the requirement for motor torque, effectively reduce the cost of motor and electronic control, ensure the high wheel end torque output of vehicle, and significantly improve the climbing performance.

[0028] (IV) The planetary gear is used on the input shaft and shifted, compared with conventional shift gear, the overall power system is more compact in axial space, which is very beneficial for space arrangement of airbag vehicle matching vehicle.

[0029] (V) The utility model provides a kind of power uninterrupted integrated double-motor two-gear electric drive axle assembly, which can integrate power system on whole bridge, and the overall design has high integration degree and good reliability. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the overall structure schematic diagram of integrated double-motor two-gear electric drive axle.

[0031] Figure 2 It is the power transmission route schematic diagram of integrated double-motor two-gear electric drive axle when in neutral gear.

[0032] Figure 3 It is the power transmission route schematic diagram of integrated double-motor two-gear electric drive axle when in first gear.

[0033] Figure 4 It is the power transmission route schematic diagram of integrated double-motor two-gear electric drive axle when in second gear.

[0034] The meanings of the various reference numerals in the figures are as follows: 1 - transmission, 2 - drive motor, 3 - first transmission, 4 - second transmission, 5 - differential assembly, 6 - half shaft, 7 - wheel, 8 - main reduction gear.

[0035] 201 - first drive motor, 202 - second drive motor.

[0036] 301 - first input shaft, 302 - first planetary gear, 303 - first intermediate shaft, 304 - first second primary gearwheel, 305 - first second driven gearwheel, 306 - first output shaft, 307 - first third primary gearwheel, 308 - first housing fixing plate, 309 - first shift sleeve.

[0037] 401 - second input shaft, 402 - second planetary gear, 403 - second intermediate shaft, 404 - second second primary gearwheel, 405 - second second driven gearwheel, 406 - second output shaft, 407 - second third primary gearwheel, 408 - second housing fixing plate, 409 - second shift sleeve.

[0038] 501 - differential housing.

[0039] 30201 - first ring gear, 30202 - first sun gear, 30203 - first planet gear, 30204 - first planet carrier.

[0040] 40201 - second ring gear, 40202 - second sun gear, 40203 - second planet gear, 40204 - second planet carrier.

[0041] The specific content of the present application is further explained and described in detail below in connection with the embodiments. DETAILED DESCRIPTION

[0042] It should be noted that all the devices and components in the present application, if not specifically stated, all use the devices and components known in the prior art.

[0043] In accordance with the above technical solution, the specific embodiments of the present application are given below. It should be noted that the present application is not limited to the following specific embodiments, and any equivalent variations made on the basis of the technical solution of the present application fall within the scope of protection of the present application.

[0044] Embodiment:

[0045] The present embodiment gives a power uninterrupted integrated double-motor two-gear electric drive axle assembly, which comprises a transmission 1 and a drive motor 2 arranged independently, as shown in Figure 1 The transmission 1 is divided into a first transmission 3 and a second transmission 4 symmetrically distributed in front and back, and the drive motor 2 is divided into a first drive motor 201 and a second drive motor 202 symmetrically distributed in front and back.

[0046] As shown in Figure 1 , the first transmission 3 comprises a first input shaft 301 and a main reduction gear 8, one end of the first input shaft 301 is connected with the first drive motor 201, and the main reduction gear 8 is connected with the differential housing 501 in the differential assembly 5.

[0047] As shown in Figure 1 , the second transmission 4 comprises a second input shaft 401 and a main reduction gear 8, one end of the second input shaft 401 is connected with the second drive motor 202, and the main reduction gear 8 is connected with the differential housing 501 in the differential assembly 5.

[0048] As shown in Figure 1 , the other end of the first input shaft 301 is connected with the first planetary gear 302, the first planetary gear 302 is connected with one end of the first intermediate shaft 303, the other end of the first intermediate shaft 303 is installed with a first secondary driving gear 304, the first secondary driving gear 304 is engaged with a first secondary driven gear 305, the first secondary driven gear 305 is fixedly connected with one end of a first output shaft 306, the other end of the first output shaft 306 is installed with a first tertiary driving gear 307, and the first tertiary driving gear 307 is engaged with the main reduction gear 8.

[0049] As shown in Figure 1 , the other end of the second input shaft 401 is connected with the second planetary gear 402, the second planetary gear 402 is connected with one end of the second intermediate shaft 403, the other end of the second intermediate shaft 403 is installed with a second secondary driving gear 404, the second secondary driving gear 404 is engaged with a second secondary driven gear 405, the second secondary driven gear 405 is fixedly connected with one end of a second output shaft 406, the other end of the second output shaft 406 is installed with a second tertiary driving gear 407, and the second tertiary driving gear 407 is engaged with the main reduction gear 8.

[0050] As shown in Figure 1 , the first planetary gear 302 comprises a first ring gear 30201, a first sun gear 30202, a first planetary gear 30203 and a first carrier 30204.

[0051] As shown in Figure 1 , the second planetary gear 402 comprises a second ring gear 40201, a second sun gear 40202, a second planetary gear 40203 and a second carrier 40204.

[0052] As shown in Figure 1 , the other end of the first input shaft 301 is connected with the first sun gear 30202 in the first planetary gear 302.

[0053] AsFigure 1 As shown, the other end of the second input shaft 401 is connected with the second sun gear 40202 in the second planetary gear 402.

[0054] As shown, the first planetary carrier 30204 in the first planetary gear 302 is connected with one end of the first intermediate shaft 303. Figure 1

[0055] As shown, the second planetary carrier 40204 in the second planetary gear 402 is connected with one end of the second intermediate shaft 403. Figure 1

[0056] As shown, the first transmission 3 further includes a first housing fixing plate 308 and a first shift sleeve 309. Figure 1

[0057] As shown, the second transmission 4 further includes a second housing fixing plate 408 and a second shift sleeve 409. Figure 1

[0058] As shown, the first shift sleeve 309 can be splined with the first ring gear 30201, the first housing fixing plate 308 and the first planetary carrier 30204, alone or in combination. Figure 1

[0059] As shown, the second shift sleeve 409 can be splined with the second ring gear 40201, the second housing fixing plate 408 and the second planetary carrier 40204, alone or in combination. Figure 1

[0060] As shown, the differential assembly 5 is connected with the wheels 7 through the half shafts 6. Figure 2 Specifically, as shown, in the neutral state, the first shift sleeve 309 is only splined with the first ring gear 30201, the second shift sleeve 409 is only splined with the second ring gear 40201, the power of the first drive motor 201 drives the first sun gear 30202 to rotate, and in turn drives the first planetary gear 30203 and the first ring gear 30201 to idle, the transmission route of the second drive motor 202 is the same as that of the first drive motor 201, and the overall electric drive system has no torque output.

[0061] Figure 3 Specifically, as shown, in the first gear state, the first shift sleeve 309 is splined with the first ring gear 30201 and the first planetary carrier 30204, the second shift sleeve 409 is splined with the second ring gear 40201 and the second planetary carrier 40204, the power of the first drive motor 201 drives the first sun gear 30202 to rotate, and in turn drives the first planetary gear 30203 and the first ring gear 30201 to rotate, the transmission route of the second drive motor 202 is the same as that of the first drive motor 201, and the overall electric drive system has no torque output.

[0062] Specifically, as shown, in the second gear state, the first shift sleeve 309 is splined with the first ring gear 30201 and the first planetary carrier 30204, the second shift sleeve 409 is splined with the second ring gear 40201 and the second planetary carrier 40204, the power of the first drive motor 201 drives the first sun gear 30202 to rotate, and in turn drives the first planetary gear 30203 and the first ring gear 30201 to rotate, the transmission route of the second drive motor 202 is the same as that of the first drive motor 201, and the overall electric drive system has no torque output. Figure 4 ​​​​​​​As shown, in the first gear state, the first shift sleeve 309 is simultaneously in mesh with the first ring gear 30201 and the first housing fixed plate 308, the second shift sleeve 409 is simultaneously in mesh with the second ring gear 40201 and the second housing fixed plate 408, the first transmission 3 and the second transmission 4 are both in the first gear, at this time, it is three-stage transmission, the transmission ratio is the largest, and the largest wheel end torque can be provided, and this mode is suitable for working conditions with high torque requirements such as starting and climbing.

[0063] Specifically, as shown in the figure, ​ As shown, in the second gear state, the first shift sleeve 309 is simultaneously in mesh with the first ring gear 30201 and the first carrier 30204, the second shift sleeve 409 is simultaneously in mesh with the second ring gear 40201 and the second carrier 40204, the first transmission 3 and the second transmission 4 are both in the second gear, at this time, it is two-stage transmission, and the mechanical transmission efficiency is the highest, and this mode is suitable for working conditions with high vehicle speed requirements such as high-speed cruising.

[0064] Specifically, in the process of moving the first shift sleeve 309 from the left end to the right end, the second shift sleeve 409 always remains in mesh with the second ring gear 40201 and the second housing fixed plate 408. At this time, the first transmission 3 has no power output, but the power of the second transmission 4 is transmitted to the differential housing 501 and the half shaft 6 through the main reduction gear 8 to drive the wheel 7 to rotate. After the first shift sleeve 309 completes the gear switching, the second shift sleeve 409 moves from the left end to the right end, and in this process, the second transmission 4 has no power output, and the first transmission 3 is transmitted to the differential housing 501 and the half shaft 6 through the main reduction gear 8 to drive the wheel 7 to rotate. The double-motor two-gear electric drive axle assembly proposed in this embodiment can realize a total of nine working modes, as shown in Table 1, and the above mode ensures that there is no power interruption during gear shifting during vehicle driving, and improves the comfort and safety of the vehicle.

[0065] Table 1: Working modes of the double-motor two-gear electric drive axle assembly

[0066]

[0067]

Claims

1. A power-uninterrupted integrated dual-motor two-speed electric drive axle assembly, comprising an independently configured transmission (1) and a drive motor (2), characterized in that, The transmission (1) is divided into a first transmission (3) and a second transmission (4) symmetrically distributed in front and rear, and the drive motor (2) is divided into a first drive motor (201) and a second drive motor (202) symmetrically distributed in front and rear. The first transmission (3) includes a first input shaft (301) and a main reduction gear (8). One end of the first input shaft (301) is connected to the first drive motor (201), and the main reduction gear (8) is connected to the differential housing (501) in the differential assembly (5). The second transmission (4) includes a second input shaft (401) and a main reduction gear (8). One end of the second input shaft (401) is connected to the second drive motor (202), and the main reduction gear (8) is connected to the differential housing (501) in the differential assembly (5). The other end of the first input shaft (301) is connected to the first planetary gear (302), the first planetary gear (302) is connected to one end of the first intermediate shaft (303), the other end of the first intermediate shaft (303) is equipped with a first secondary driving gear (304), the first secondary driving gear (304) meshes with the first secondary driven gear (305), the first secondary driven gear (305) is fixedly connected to one end of the first output shaft (306), the other end of the first output shaft (306) is equipped with a first tertiary driving gear (307), the first tertiary driving gear (307) meshes with the main reduction gear (8); The other end of the second input shaft (401) is connected to the second planetary gear (402), the second planetary gear (402) is connected to one end of the second intermediate shaft (403), the other end of the second intermediate shaft (403) is equipped with a second secondary driving gear (404), the second secondary driving gear (404) meshes with the second secondary driven gear (405), the second secondary driven gear (405) is fixedly connected to one end of the second output shaft (406), the other end of the second output shaft (406) is equipped with a second tertiary driving gear (407), the second tertiary driving gear (407) meshes with the main reduction gear (8).

2. The uninterrupted power integrated dual-motor two-speed electric drive axle assembly as described in claim 1, characterized in that, The first planetary gear (302) includes a first gear ring (30201), a first sun gear (30202), a first planet gear (30203), and a first planet carrier (30204). The second planetary gear (402) includes a second ring gear (40201), a second sun gear (40202), a second planet gear (40203), and a second planet carrier (40204).

3. The uninterrupted power integrated dual-motor two-speed electric drive axle assembly as described in claim 2, characterized in that, The other end of the first input shaft (301) is connected to the first sun gear (30202) in the first planetary gear (302); The other end of the second input shaft (401) is connected to the second sun gear (40202) in the second planetary gear (402).

4. The uninterrupted power integrated dual-motor two-speed electric drive axle assembly as described in claim 2, characterized in that, The first planet carrier (30204) in the first planetary gear (302) is connected to one end of the first intermediate shaft (303); The second planetary carrier (40204) in the second planetary gear (402) is connected to one end of the second intermediate shaft (403).

5. The uninterrupted power integrated dual-motor two-speed electric drive axle assembly as described in claim 2, characterized in that, The first transmission (3) also includes a first housing fixing plate (308) and a first shift sleeve (309). The second transmission (4) also includes a second housing fixing plate (408) and a second shift sleeve (409).

6. The uninterrupted power integrated dual-motor two-speed electric drive axle assembly as described in claim 5, characterized in that, The first shift sleeve (309) can engage with the first gear ring (30201), the first housing fixing plate (308), and the first planetary carrier (30204) individually or in combination via splines; The second shift sleeve (409) can engage with the second gear ring (40201), the second housing fixing plate (408), and the second planetary carrier (40204) individually or in combination via splines.

7. The uninterrupted power integrated dual-motor two-speed electric drive axle assembly as described in claim 1, characterized in that, The differential assembly (5) is connected to the wheel (7) via a half shaft (6).

Images