Two-gear electric drive axle arranged on one side

Abstract

The utility model relates to the technical field of new energy automobile parts, in particular to a unilaterally-arranged two-gear electric drive axle which comprises a first shaft, a second shaft, a third shaft and a gear shifter, the first shaft is driven by a motor, and one end of the first shaft is fixed to an output shaft of the motor; the second shaft and the first shaft are connected through a first gear set, and a first gear shifting driving gear and a second gear shifting driving gear are further fixedly arranged on the second shaft. The third shaft is connected with a differential mechanism of the automobile through a second gear set. The third shaft is rotationally sleeved with a first gear shifting driven gear and a second gear shifting driven gear which are meshed with the first gear shifting driving gear and the second gear shifting driving gear respectively. The gear shifter is fixed to the third shaft and selectively combined with the first gear shifting driven gear and the second gear shifting driven gear through a magnetic driver. The gear shifter can be combined with the two gear shifting driven gears in a non-contact mode, and therefore efficient gear shifting can be guaranteed, and mechanical damage can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicle components, in particular to a two-speed electric drive axle arranged on one side. Background Art

[0002] With growing global awareness of environmental protection and the development of new energy technologies, new energy vehicles have become a key development direction in the automotive industry, garnering significant attention and support from governments worldwide. Within the electric drive system, a core component of new energy vehicles, the electric drive axle, a key component connecting the motor and wheels, directly impacts the vehicle's power, economy, and comfort. Currently, most electric drive axles on the market utilize single- or two-speed designs, with two-speed designs offering better adaptability to diverse operating conditions and improving overall vehicle efficiency.

[0003] For example, the utility model patent with patent application number CN2023229464.9 discloses a two-speed electric drive axle arranged on one side. The electric drive axle can be selectively combined with the first shift passive gear or the second shift passive gear through the first shifter to achieve conversion between different gears, thereby meeting the power requirements under different driving conditions. However, the patent document does not give the specific combination mechanism between the shifter and the two sets of passive gears. In practice, if a conventional mechanical shifting method is adopted, that is, the shifter is in direct contact with the passive gear for gear switching, then direct shifting when the vehicle is running at high speed may cause wear or even damage to the shifter and the passive gear; while shifting in a deceleration state can reduce mechanical damage, it will reduce the shifting efficiency, affecting the driver's operating experience and the overall performance of the vehicle.

[0004] Therefore, developing a single-sided two-speed electric drive axle that can ensure efficient shifting and avoid mechanical damage has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] The purpose of the present utility model is to provide a two-speed electric drive bridge arranged on one side, so as to solve the problems raised in the above-mentioned background technology.

[0006] The utility model is realized through the following technical solutions:

[0007] A two-speed electric drive axle arranged on one side, comprising:

[0008] a first axis driven by a motor;

[0009] A second shaft is connected to the first shaft via a first gear set, and a first shift driving gear and a second shift driving gear are fixedly provided on the second shaft;

[0010] a third shaft connected to the differential of the vehicle via a second gear set, wherein the third shaft is rotatably sleeved with a first shift driven gear and a second shift driven gear respectively meshing with the first shift driving gear and the second shift driving gear; and

[0011] A shifter is fixed on the third shaft and selectively combines the first shift passive gear and the second shift passive gear through a magnetic drive.

[0012] Optionally, the magnetic drive includes at least one group of first magnets fixed on the shifter, and two groups of second magnets respectively fixed on the first shift passive gear and the second shift passive gear, at least one of the first magnet and the second magnet is an electromagnet.

[0013] Optionally, two groups of the first magnets are provided, and the two groups of the first magnets are respectively provided on both sides of the shifter, and a magnetic isolation plate is provided between the two groups of the first magnets.

[0014] Optionally, the two groups of second magnets are electromagnets, and the two groups of second magnets are fixed to the first shift passive gear and the second shift passive gear in a detachable manner. The second magnets include an iron core and a coil wound on the iron core. A threaded column is provided at one end of the iron core, and a limit plate is provided at the other end. The first shift passive gear and the second shift passive gear are provided with mounting blind holes for mounting the iron core, and threaded holes threadedly connected to the threaded column are provided in the mounting blind holes.

[0015] Optionally, the first magnet is an electromagnet, the first magnet is detachably fixed to the shifter, and the first magnet and the shifter are connected in the same manner as the second magnet and two shifting passive gears are detachably connected.

[0016] Optionally, the first shaft, the second shaft and the third shaft are enclosed in a transmission housing filled with lubricating oil.

[0017] Compared with the prior art, the present invention provides a two-speed electric drive axle arranged on one side, which has the following beneficial effects:

[0018] 1. The shifter of the present invention can achieve shifting by non-contacting engagement with the first or second shifting passive gears through a magnetic drive. In this shifting mode, there is no contact between the shifter and the first or second shifting passive gears, thus ensuring efficient shifting while avoiding mechanical damage.

[0019] 2. The shifter of the present invention can achieve magnetic connection with the two shifting passive gears on both sides thereof through two sets of first magnets, and the magnetic isolation plate can reduce the mutual influence between the two sets of first magnets;

[0020] 3. The two groups of second magnets in the present invention are fixed to the first shifting passive gear and the second shifting passive gear in a detachable manner, which can facilitate the subsequent disassembly and maintenance of the coils of the second magnets. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the split structure of the first shifting passive gear and the second magnet of the utility model;

[0024] Figure 4 This is a schematic diagram of the second magnet structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the assembly structure of the shifter and the first magnet of the utility model.

[0026] In the figure: 1. first shaft; 2. second shaft; 3. third shaft; 4. shifter; 5. motor; 6. first gear; 7. second gear; 8. third gear; 9. fourth gear; 10. first shift driving gear; 11. second shift driving gear; 12. first shift passive gear; 13. second shift passive gear; 14. differential; 15. first magnet; 16. second magnet; 160. iron core; 161. coil; 162. threaded column; 163. limit plate; 17. magnetic isolation plate; 18. mounting blind hole; 19. threaded hole; 20. transmission housing; 21. wheel. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: See Figures 1 to 5According to an embodiment of the present invention, a two-speed electric drive bridge arranged on one side is provided, comprising a first shaft 1, a second shaft 2, a third shaft 3 and a shifter 4, wherein the first shaft 1 is driven by a motor 5, one end of the first shaft 1 is fixed to the output shaft of the motor 5; the second shaft 2 is connected to the first shaft 1 through a first gear set, specifically, the first gear set comprises a first gear 6 and a second gear 7 that are meshed with each other and fixed to the first shaft 1 and the second shaft 2 respectively, and a first shift driving gear 10 and a second shift driving gear 11 are also fixed on the second shaft 2; the third shaft 3 is connected to the vehicle's The differential 14 is connected via a second gear set. Specifically, the second gear set includes a third gear 8 and a fourth gear 9 that mesh with each other. The third gear 8 is fixed to the third shaft 3, and the fourth gear 9 is mounted on the housing of the differential 14. The third shaft 3 is rotatably mounted with a first shift driven gear 12 and a second shift driven gear 13 that mesh with the first shift driving gear 10 and the second shift driving gear 11, respectively. The shifter 4 is fixed to the third shaft 3 and selectively engages the first shift driven gear 12 and the second shift driven gear 13 via a magnetic drive. The transmission ratio between the first shift driving gear 10 and the first shift driven gear 12 is different from the transmission ratio between the second shift driving gear 11 and the second shift driven gear 13.

[0029] By adopting the two-speed electric drive bridge with a single-side arrangement of the above structure, the shifter 4 can be non-contactly coupled with the first shift passive gear 12 or the second shift passive gear 13 through a magnetic drive. That is to say, the power of the shifter 4 can be transmitted to the first shift passive gear 12 or the second shift passive gear 13 through the magnetic force of the magnetic drive, thereby achieving the purpose of shifting. In this shifting mode, there is no contact between the shifter 4 and the first and second shift passive gears 13, which can ensure efficient shifting and avoid mechanical damage.

[0030] When necessary, the differential 14 and the connection method between the differential 14 and the wheel 21 in this embodiment adopt the same structure as the differential 14 and the connection method between the differential 14 and the wheel 21 in the patent application number CN2023229464.9.

[0031] In this exemplary embodiment, the magnetic drive includes at least one group of first magnets 15 fixed to the shifter 4, wherein the multiple electromagnets in each group of first magnets 15 are arranged circumferentially on the shifter 4, and two groups of second magnets 16 fixed to the first shift driven gear 12 and the second shift driven gear 13, respectively, wherein the multiple second magnets 16 in each group of second magnets 16 are arranged circumferentially on the shift driven gear, and at least one of the first magnet 15 and the second magnet 16 is an electromagnet. The electromagnet is magnetic when energized and loses its magnetism when the power is turned off, thus facilitating the control of the magnetic connection between the shifter 4 and the two shift driven gears. It is understandable that in order to facilitate the energization of the electromagnet performing circular motion, a slip ring can be used to connect the coil 161 of the electromagnet to an external power source.

[0032] In this exemplary embodiment, two groups of first magnets 15 are provided, one on each side of the shifter 4, with a magnetic shielding plate 17 disposed between the two groups of first magnets 15. The two groups of first magnets 15 enable the shifter 4 to achieve a magnetic connection with the two shifting driven gears on either side thereof, while the magnetic shielding plate 17 reduces the mutual influence between the two groups of first magnets 15.

[0033] In this exemplary embodiment, the two sets of second magnets 16 are electromagnets and are detachably fixed to the first and second shift driven gears 12, 13. The second magnets 16 include an iron core 160 and a coil 161 wound around the iron core 160. The iron core 160 has a threaded post 162 at one end and a retaining plate 163 at the other end. The first and second shift driven gears 12, 13 are provided with blind mounting holes 18 for mounting the iron core 160. Within the blind mounting holes 18 are threaded holes 19 that are threadedly connected to the threaded post 162. The detachable connection of the second magnets 16 to the first and second shift driven gears 12, 13 facilitates subsequent disassembly, assembly, and maintenance of the coils 161 of the second magnets 16.

[0034] In this exemplary embodiment, the first magnet 15 is an electromagnet and is detachably fixed to the shifter 4. The first magnet 15 is connected to the shifter 4 in the same manner as the second magnet 16 is detachably connected to the two shifting driven gears. This also facilitates the disassembly and maintenance of the coil 161 of the first magnet 15.

[0035] In this exemplary embodiment, the first shaft 1, the second shaft 2, and the third shaft 3 are enclosed in a transmission housing 20 filled with lubricating oil. Specifically, the first gear set, the second gear set, the first shift driving gear 10, the second shift driving gear 11, the first shift driven gear 12, and the second shift driven gear 13 are all disposed within the transmission housing 20, thereby meeting the lubrication requirements of these components during operation.

[0036] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-speed electric drive bridge arranged on one side, characterized in that: include: a first shaft (1) driven by a motor (5); A second shaft (2) is connected to the first shaft (1) via a first gear set, and a first shift driving gear (10) and a second shift driving gear (11) are fixedly provided on the second shaft (2); A third shaft (3) is connected to a differential (14) of the vehicle via a second gear set, wherein a first shift driven gear (12) and a second shift driven gear (13) are rotatably sleeved on the third shaft (3) and are respectively meshed with the first shift driving gear (10) and the second shift driving gear (11); and A shifter (4) is fixed on the third shaft (3) and selectively combines the first shifting passive gear (12) and the second shifting passive gear (13) through a magnetic drive.

2. The single-side two-speed electric drive axle according to claim 1, characterized in that: The magnetic drive comprises at least one group of first magnets (15) fixed on the shifter (4), and two groups of second magnets (16) respectively fixed on the first shifting passive gear (12) and the second shifting passive gear (13), wherein at least one of the first magnets (15) and the second magnets (16) is an electromagnet.

3. The single-side two-speed electric drive axle according to claim 2, characterized in that: Two groups of the first magnets (15) are provided. The two groups of the first magnets (15) are respectively provided on both sides of the shifter (4), and a magnetic isolation plate (17) is provided between the two groups of the first magnets (15).

4. The single-side two-speed electric drive axle according to claim 2, characterized in that: The two groups of the second magnets (16) are electromagnets. The two groups of the second magnets (16) are fixed to the first shifting passive gear (12) and the second shifting passive gear (13) in a detachable manner. The second magnets (16) include an iron core (160) and a coil (161) wound around the iron core (160). One end of the iron core (160) is provided with a threaded column (162), and the other end is provided with a limiting plate (163). The first shifting passive gear (12) and the second shifting passive gear (13) are provided with mounting blind holes (18) for mounting the iron core (160). A threaded hole (19) threadedly connected to the threaded column (162) is provided in the mounting blind hole (18).

5. The single-side two-speed electric drive axle according to claim 4, characterized in that: The first magnet (15) is an electromagnet, and the first magnet (15) is detachably fixed to the shifter (4). The first magnet (15) and the shifter (4) are connected in the same manner as the second magnet (16) and two shifting driven gears are detachably connected.

6. The single-side two-speed electric drive axle according to claim 1, characterized in that: The first shaft (1), the second shaft (2) and the third shaft (3) are enclosed in a transmission housing (20) filled with lubricating oil.

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