Integrated differential lock rear axle of electric vehicle

Abstract

The utility model relates to the technical field of vehicle rear axles, and discloses an electric vehicle integrated differential lock rear axle which comprises a driving shell, a tooth bag is installed at the bottom of the driving shell, axle housings are integrally arranged on the two sides of the driving shell, hubs are arranged at the ends, far away from the driving shell, of the axle housings, and the wheel hubs are connected with the tooth bag. And a first main shaft and a second main shaft are mounted on the hubs on the two sides of the driving shell correspondingly. According to the integrated differential lock rear axle of the electric vehicle, the problems that in the prior art, a main shaft in a rear axle needs to be divided into two sections for mounting a differential mechanism, the differential mechanism serves as a splicing assembly, but when the electric vehicle runs on the muddy and slippery ground, most of the slipping positions are located on the single side of the electric vehicle, and the differential mechanism adjusts the rotating speed of wheels on the two sides; in the prior art, power cannot be effectively transmitted to wheels with road holding force, so that the vehicle is out of control or slips, and the driving stability and safety of the electric vehicle are severely influenced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle rear axle technology, specifically to an integrated differential lock rear axle for electric vehicles. Background Technology

[0002] Electric vehicles are wheels driven by motors and powered by batteries. To improve their cargo-carrying capacity, three-wheeled electric vehicles are widely used in production and daily life due to their advantages such as strong applicability, maneuverability, simple maintenance, convenient repair, and low price. Since the rear bed of a three-wheeled electric vehicle needs to use the wheels on both sides to maintain balance and bear weight, a rear axle and its built-in differential are required to ensure the normal operation of the vehicle.

[0003] The main function of the rear axle of a three-wheeled electric vehicle is to provide support and drive, ensuring stable driving. To reduce friction caused by the different rotation speeds of the tires on both sides of the rear axle when turning, a differential is usually installed in the rear axle. This ensures that the wheels on both sides can rotate at different speeds when turning. In current technology, installing a differential requires dividing the main shaft in the rear axle into two sections, with the differential serving as the connecting component. However, when the electric vehicle is traveling on muddy or slippery ground, the slippage mostly occurs on one side of the vehicle. Even with the differential adjusting the rotation speed of the wheels on both sides, it is impossible to effectively transfer power to the wheels with traction, leading to loss of control or slippage, which seriously affects the driving stability and safety of the electric vehicle. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an integrated differential lock rear axle for electric vehicles, solving the problems mentioned in the background.

[0005] This utility model provides the following technical solution: an integrated differential lock rear axle for electric vehicles, comprising: a drive housing, a toothed housing installed at the bottom of the drive housing, an axle housing integrally provided on both sides of the drive housing, a wheel hub provided at the end of the axle housing away from the drive housing, a first main shaft and a second main shaft respectively installed on the wheel hubs located on both sides of the drive housing, the first main shaft and the second main shaft both passing through the axle housing and forming a spline shaft inside the drive housing, a locking push mechanism, a drive wheel and a differential mechanism respectively provided on the toothed housing, and the locking push mechanism, the drive wheel and the differential mechanism coaxially sleeved on the first main shaft and the second main shaft;

[0006] The locking and pushing mechanism includes a locking sleeve sleeved on the first main shaft, a locking and pushing frame provided on the locking sleeve, a coupling member snapped onto one end of the locking sleeve, the coupling member being installed on one side of the drive wheel, and a first bearing sleeved on the coupling member;

[0007] A differential mechanism is installed on the other side of the drive wheel. A second bearing is fitted on the differential mechanism, and the ports of the first spindle and the second spindle are both located inside the differential mechanism.

[0008] Preferably, the gearbox includes a main reducer, on which a mounting flange is integrally formed. Two vertical mounting brackets are provided on the side of the mounting flange away from the main reducer, and the first bearing and the second bearing are respectively installed in the two mounting brackets.

[0009] Preferably, the differential mechanism includes a first side gear, the shape of the inner wall of the first side gear is adapted to the shape of the spline shaft on the first main shaft, the first side gear is sleeved on the end of the first main shaft, and the drive wheel is rotatably sleeved on the first side gear.

[0010] Preferably, the differential mechanism further includes a mounting sleeve, the second bearing is sleeved on the mounting sleeve, a second side gear is connected to the end of the mounting sleeve, a differential frame is integrally provided on the outer edge of one end of the mounting sleeve passing through the second bearing, the differential frame is mounted on the drive wheel, a planetary gear is rotatably provided on the differential frame, the outer edge of the planetary gear meshes with the outer edges of the first side gear and the second side gear respectively, the inner wall of the second side gear is adapted to the shape of the spline shaft on the second main shaft, and the mounting sleeve is rotatably sleeved on the second main shaft.

[0011] Preferably, a through hole is integrally formed on the drive housing, and the structure of the locking mechanism passes through the through hole and is located outside the drive housing. An external bracket and a mounting buckle are welded on the bridge housing, and the position of the external bracket corresponds to the position of the through hole.

[0012] Preferably, the locking sleeve includes a sleeve body, the inner wall of which is adapted to the shape of the spline shaft on the first main shaft, and the sleeve body is slidably sleeved on the first main shaft. An annular groove is formed on the surface of the sleeve body, and the locking pusher is rotatably embedded in the inner wall of the annular groove.

[0013] Preferably, one end of the sleeve is integrally provided with a tooth, and the end of the coupling is provided with a groove, the tooth is engaged in the groove, and the coupling is rotatably sleeved on the first main shaft.

[0014] Preferably, the lock pusher includes a push handle, one end of which is rotatably engaged with the lock sleeve, and a push shaft is provided on the side of the push handle near the other end, with an external groove provided at the end of the push shaft.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This electric vehicle features an integrated differential lock rear axle. By designating the ends of the first and second main shafts within the drive housing as splined shafts, the locking mechanism, drive wheel, and differential mechanism can be directly mounted on the first and second main shafts. The differential mechanism serves as the connecting component between the first and second main shafts and is also installed with the drive wheel, allowing the drive wheel to drive the second main shaft to rotate via the differential mechanism. A coupling is then installed on the side of the drive wheel. By pushing the locking push bracket, the locking sleeve slides onto the coupling on the first main shaft. When the locking sleeve engages with the coupling, the drive wheel rotates synchronously with the first main shaft. Furthermore, by utilizing the locking push mechanism and differential mechanism on both sides of the drive wheel to rotate synchronously with the first and second main shafts, the differential mechanism is locked, achieving the effect of synchronous rotation of both wheels on both sides of the electric vehicle. When the electric vehicle is traveling on muddy or slippery surfaces, the synchronous rotation of both wheels effectively reduces the impact of unilateral loss of control or slippage, improving the driving stability and safety of the electric vehicle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the drive housing structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the dental kit structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the main reducer structure of this utility model;

[0021] Figure 5 This is a disassembly diagram of the mounting structure on both sides of the drive wheel of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure sleeved on the first main shaft of this utility model;

[0023] Figure 7 This is a schematic diagram of the structure sleeved on the second main shaft of this utility model;

[0024] Figure 8 This is a schematic diagram of the disassembled structure of the locking and pushing mechanism of this utility model.

[0025] In the diagram: 1. Drive housing; 2. Through hole; 3. Locking push mechanism; 31. Lock sleeve; 311. Sleeve body; 312. Annular groove; 313. Raised tooth; 314. Groove; 32. Locking push frame; 321. Push handle; 322. Push shaft; 323. External groove; 33. Coupling; 4. Gearbox; 41. Main reducer; 42. Mounting frame; 43. Mounting flange; 5. Axle housing; 6. Hub; 7. External frame; 8. Mounting buckle; 9. First main shaft; 10. Second main shaft; 11. Drive wheel; 12. Differential mechanism; 121. First side gear; 122. Assembly sleeve; 123. Differential frame; 124. Planetary gear; 125. Second side gear; 13. First bearing; 14. Second bearing. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-8 An integrated differential lock rear axle for an electric vehicle includes: a drive housing 1, a toothed ring 4 mounted on the bottom of the drive housing 1, an axle housing 5 integrally mounted on both sides of the drive housing 1, a wheel hub 6 mounted on the end of the axle housing 5 away from the drive housing 1, a first main shaft 9 and a second main shaft 10 respectively mounted on the wheel hub 6 on both sides of the drive housing 1, the first main shaft 9 and the second main shaft 10 both pass through the axle housing 5 and form a spline shaft inside the drive housing 1, a locking push mechanism 3, a drive wheel 11 and a differential mechanism 12 are respectively mounted on the toothed ring 4, and the locking push mechanism 3, the drive wheel 11 and the differential mechanism 12 are coaxially sleeved on the first main shaft 9 and the second main shaft 10;

[0028] The locking mechanism 3 includes a locking sleeve 31 sleeved on the first main shaft 9, a locking push frame 32 provided on the locking sleeve 31, a coupling 33 snapped onto one end of the locking sleeve 31, the coupling 33 being installed on one side of the drive wheel 11, and a first bearing 13 being sleeved on the coupling 33.

[0029] A differential mechanism 12 is installed on the other side of the drive wheel 11. A second bearing 14 is fitted on the differential mechanism 12, and the ports of the first main shaft 9 and the second main shaft 10 are both located inside the differential mechanism 12.

[0030] The gearbox 4 includes a main reducer 41, on which an integral mounting flange 43 is formed. Two vertical mounting brackets 42 are provided on the side of the mounting flange 43 away from the main reducer 41. The first bearing 13 and the second bearing 14 are respectively installed in the two mounting brackets 42. The mounting brackets 42 on the gearbox 4 serve as a support mechanism, so that the differential mechanism 12 and the locking mechanism 3 located on both sides of the drive wheel 11 can be fixed in the drive housing 1, thus preventing the structure inside the drive housing 1 from being misaligned due to the bumps of the electric vehicle.

[0031] The differential mechanism 12 includes a first side gear 121. The shape of the inner wall of the first side gear 121 is adapted to the shape of the spline shaft on the first main shaft 9. The first side gear 121 is sleeved on the end of the first main shaft 9, and the drive wheel 11 is rotatably sleeved on the first side gear 121. By utilizing the first side gear 121 sleeved on the first main shaft 9 and the second side gear 125 sleeved on the second main shaft 10, the drive wheel 11 can drive the first main shaft 9 and the second main shaft 10 to rotate through the differential mechanism 12, thereby achieving the purpose of driving the wheels. When the lock pusher... After mechanism 3 is locked, drive wheel 11 rotates synchronously with first main shaft 9 under the action of locking push mechanism 3, causing first side gear 121 to rotate synchronously with drive wheel 11. This fixes the position of the side of first side gear 121 and differential frame 123 due to drive wheel 11. Then, the meshing part of the side of first side gear 121 clamps planetary gear 124, stopping planetary gear 124 from rotating. Then, the meshing part of planetary gear 124 clamps second main shaft 10, achieving the effect of locking differential mechanism 12 by locking push mechanism 3, so that the wheels on both sides of the electric vehicle rotate synchronously and drive.

[0032] The differential mechanism 12 also includes a mounting sleeve 122, on which a second bearing 14 is fitted. A second side gear 125 is attached to the end of the mounting sleeve 122. A differential frame 123 is integrally mounted on the outer edge of the mounting sleeve 122 passing through one end of the second bearing 14. The differential frame 123 is mounted on the drive wheel 11. A planetary gear 124 is rotatably mounted on the differential frame 123. The outer edge of the planetary gear 124 meshes with the outer edges of the first side gear 121 and the second side gear 125, respectively. The inner wall of the second side gear 125 is adapted to the shape of the spline shaft on the second main shaft 10. The mounting sleeve 122 is rotatably fitted on the second main shaft 10. By mounting the differential frame 123 on the drive wheel 11, the rotation of the drive wheel 11 can drive the second side gear 125 to rotate through the planetary gear 124, thereby causing the second main shaft 10 to rotate with the second side gear 125. When the speeds of the two sides of the electric vehicle are inconsistent, the differential connection is completed.

[0033] The drive housing 1 has an integrally formed through hole 2. The structure of the locking push mechanism 3 passes through the through hole 2 and is located outside the drive housing 1. The axle housing 5 is welded with an external frame 7 and a mounting buckle 8. The position of the external frame 7 corresponds to the position of the through hole 2. By installing an electric cylinder or other mechanism with pushing ability on the external frame 7, the electric vehicle driver can freely control the engagement and disengagement of the locking push mechanism 3, and then control whether the differential lock is opened according to the road conditions.

[0034] The locking sleeve 31 includes a sleeve body 311. The inner wall of the sleeve body 311 is adapted to the shape of the spline shaft on the first main shaft 9. The sleeve body 311 is slidably sleeved on the first main shaft 9. An annular groove 312 is formed on the surface of the sleeve body 311. The locking pusher 32 is rotatably embedded in the inner wall of the annular groove 312. The locking sleeve 31 rotates with the first main shaft 9. At the same time, the annular groove 312 is connected to the locking pusher 32, so that the locking pusher 32 can push the locking sleeve 31 to slide without affecting its rotation.

[0035] One end of the sleeve 311 is integrally provided with a tooth 313, and the end of the coupling 33 is provided with a groove 314. The tooth 313 is engaged in the groove 314, and the coupling 33 is rotatably sleeved on the first main shaft 9. When the locking sleeve 31 is pushed to slide by the locking pusher 32, the tooth 313 is engaged in the groove 314 as the locking sleeve 31 moves, thereby transmitting the rotational force of the drive wheel 11 to the locking sleeve 31 through the coupling 33, and then using the locking sleeve 31 to drive the first main shaft 9 to rotate.

[0036] The locking pusher 32 includes a push handle 321, one end of which is rotatably fitted into the lock sleeve 31. A push shaft 322 is provided on the side of the push handle 321 near the other end. An external groove 323 is provided at the end of the push shaft 322. The push shaft 322 passes through the through hole 2 on the drive housing 1, so that the mechanism installed outside the drive housing 1 can control the locking pusher mechanism 3 by pushing the push shaft 322. At the same time, a stuffing box is provided at the connection between the push shaft 322 and the through hole 2, so that lubricating oil can be added normally inside the drive housing 1 and the lubricating oil leakage is prevented.

[0037] Working principle: When the electric vehicle is traveling on a wet and slippery road surface, the locking pusher 32 pushes the locking sleeve 31, so that the locking sleeve 31 slides and engages with the coupling 33 on the first main shaft 9, and rotates synchronously with the drive wheel 11. Then, it cooperates with the second main shaft 10 on the other side of the drive wheel 11, which rotates synchronously through the differential mechanism 12, to achieve the effect of locking the differential, so that the wheels on both sides of the electric vehicle can rotate synchronously, reducing the impact of wet and slippery road surface on the electric vehicle.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rear axle with an integrated differential lock for an electric vehicle, characterized in that, include: A drive housing (1) is provided with a gearbox (4) installed at the bottom of the drive housing (1). A bridge housing (5) is integrally provided on both sides of the drive housing (1). A hub (6) is provided at the end of the bridge housing (5) away from the drive housing (1). A first main shaft (9) and a second main shaft (10) are respectively installed on the hubs (6) on both sides of the drive housing (1). The first main shaft (9) and the second main shaft (10) both pass through the bridge housing (5) and form a spline shaft inside the drive housing (1). A locking push mechanism (3), a drive wheel (11) and a differential mechanism (12) are respectively provided on the gearbox (4). The locking push mechanism (3), the drive wheel (11) and the differential mechanism (12) are coaxially sleeved on the first main shaft (9) and the second main shaft (10). The locking and pushing mechanism (3) includes a locking sleeve (31) sleeved on the first main shaft (9), a locking and pushing frame (32) provided on the locking sleeve (31), a coupling (33) snapped onto one end of the locking sleeve (31), the coupling (33) being installed on one side of the drive wheel (11), and a first bearing (13) sleeved on the coupling (33). A differential mechanism (12) is installed on the other side of the drive wheel (11). A second bearing (14) is sleeved on the differential mechanism (12), and the ports of the first main shaft (9) and the second main shaft (10) are both located inside the differential mechanism (12).

2. The integrated differential lock rear axle for electric vehicles according to claim 1, characterized in that, The tooth package (4) includes a main reducer (41), on which an integral mounting flange (43) is formed. Two vertical mounting brackets (42) are provided on the side of the mounting flange (43) away from the main reducer (41), and the first bearing (13) and the second bearing (14) are respectively installed in the two mounting brackets (42).

3. The integrated differential lock rear axle for electric vehicles according to claim 1, characterized in that, The differential mechanism (12) includes a first side gear (121), the shape of the inner wall of the first side gear (121) is adapted to the shape of the spline shaft on the first main shaft (9), the first side gear (121) is sleeved on the end of the first main shaft (9), and the drive wheel (11) is rotatably sleeved on the first side gear (121).

4. The integrated differential lock rear axle for electric vehicles according to claim 3, characterized in that, The differential mechanism (12) also includes a fitting sleeve (122), the second bearing (14) is fitted on the fitting sleeve (122), the end of the fitting sleeve (122) is connected to a second side gear (125), a differential frame (123) is integrally provided on the outer edge of the fitting sleeve (122) passing through one end of the second bearing (14), the differential frame (123) is mounted on the drive wheel (11), a planetary gear (124) is rotatably provided on the differential frame (123), the outer edge of the planetary gear (124) meshes with the outer edges of the first side gear (121) and the second side gear (125) respectively, the inner wall of the second side gear (125) is adapted to the shape of the spline shaft on the second main shaft (10), and the fitting sleeve (122) is rotatably fitted on the second main shaft (10).

5. The integrated differential lock rear axle for electric vehicles according to claim 1, characterized in that, The drive housing (1) has an integrally formed through hole (2), and the structure of the locking mechanism (3) passes through the through hole (2) and is located outside the drive housing (1). The bridge housing (5) is welded with an external bracket (7) and a fastener (8), and the position of the external bracket (7) corresponds to the position of the through hole (2).

6. The integrated differential lock rear axle for electric vehicles according to claim 1, characterized in that, The locking sleeve (31) includes a sleeve body (311), the inner wall of the sleeve body (311) is adapted to the shape of the spline shaft on the first main shaft (9), and the sleeve body (311) is slidably sleeved on the first main shaft (9). The surface of the sleeve body (311) is provided with an annular groove (312), and the locking pusher (32) is rotatably embedded in the inner wall of the annular groove (312).

7. The integrated differential lock rear axle for electric vehicles according to claim 6, characterized in that, One end of the sleeve (311) is integrally provided with a tooth (313), and the end of the coupling (33) is provided with a groove (314). The tooth (313) is engaged in the groove (314), and the coupling (33) is rotatably sleeved on the first main shaft (9).

8. The integrated differential lock rear axle for an electric vehicle according to claim 1, characterized in that, The lock pusher (32) includes a push handle (321), one end of which is rotatably fitted into the lock sleeve (31), and a push shaft (322) is provided on the side of the push handle (321) near the other end, and an external groove (323) is provided at the end of the push shaft (322).

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