Lightweight electric drive axle

Abstract

The utility model discloses a light-weight electric drive axle which comprises a differential mechanism shell base, an end cover is installed below the differential mechanism shell base, a differential mechanism main shaft is connected into the differential mechanism shell base in a penetrating mode, and a main shaft gear is installed at the bottom of the differential mechanism main shaft. A differential mechanism shell top cover is installed above the differential mechanism shell base, half shafts extend out of the left side and the right side of the differential mechanism shell top cover, the outer sides of the ends, away from the differential mechanism shell top cover, of the half shafts are sleeved with connecting sleeve shafts, and the top ends of third connecting shafts are connected with second adapter gears. The half shafts and the connecting sleeve shafts are connected to form a telescopic rod type structure, the overall length can be adjusted in a telescopic mode, when the connecting sleeve shafts are connected with wheels or a speed reducer or the like, the reserved connecting distance is enough, use of connecting accessories can be reduced, light-weight connecting accessories can be correspondingly selected, and therefore the weight of the overall electric drive axle is reduced, and the service life of the electric drive axle is prolonged. And the light weight of the electric drive axle is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive bridges, in particular to a lightweight electric drive bridge. Background Art

[0002] An electric drive axle is a device that converts electrical energy into mechanical energy, mainly used to drive vehicles or other means of transportation. It usually consists of one or more electric motors, reducers and other related components. In electric vehicles, the electric drive axle is the power source of the vehicle and is responsible for converting the electrical energy provided by the battery pack into mechanical energy to propel the vehicle forward.

[0003] The existing electric drive axle shaft connection structure is relatively fixed, and the shaft length is poor or cannot be adjusted. When installing wheels or reducers, other components are needed to reinforce or extend the shaft length, which is relatively bulky, resulting in an increase in the weight of the entire electric drive axle. In addition, the installation and calibration work are relatively complicated, not quick and convenient, and there are great limitations in application.

[0004] Therefore, those skilled in the art provide a lightweight electric drive axle to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to provide a lightweight electric drive axle to solve the problems of the existing electric drive axle shaft connection structure being relatively fixed, the shaft length being poor or unadjustable, and being relatively bulky proposed in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A lightweight electric drive axle, comprising: a differential housing base, an end cover is installed below the differential housing base, and a differential main shaft is connected through the interior of the differential housing base, a main shaft gear is installed at the bottom of the differential main shaft, and the side of the main shaft gear is meshed and connected with a first transfer gear, a first connecting shaft is connected below the first transfer gear, and a first bevel gear is installed at the shaft end of the first connecting shaft, a second bevel gear is meshed and connected below the first bevel gear, and a second connecting shaft is connected to the rear of the second bevel gear, and the shaft end of the second connecting shaft is connected to a motor, the bottom of the differential housing A differential housing top cover is installed above the seat, and half shafts extend from the left and right external sides of the differential housing top cover, first differential bevel gears are installed on the left and right internal sides of the differential housing top cover, and the first differential bevel gear is installed at one end of the half shaft located inside the differential housing top cover, and a connecting sleeve shaft is sleeved on the outer side of the end of the half shaft away from the differential housing top cover, a second differential bevel gear is provided above the internal top of the differential housing top cover, and a third connecting shaft is connected above the second differential bevel gear, the top end of the third connecting shaft is connected to the second transfer gear, and the top end of the second transfer gear is connected to the bridge shaft.

[0008] As a solution in the present invention, spring buckles are arranged at equal distances on the outer wall of the end of the half-shaft away from the differential housing top cover, and buckle holes are arranged at equal distances through the outer wall of the connecting sleeve close to the half-shaft.

[0009] As a solution in the present invention, the positions of the spring buckle and the button hole correspond to each other, and the sizes of the spring buckle and the button hole match each other.

[0010] As a solution in the present invention, a buffer spring is provided on the inner side of the connecting sleeve shaft, and the half shaft cooperates with the connecting sleeve shaft to form a telescopic structure.

[0011] As a solution in the present invention, the upper ends of the differential main shafts are respectively meshed and connected with the first differential bevel gears through bevel gear structures, and the first differential bevel gears are respectively meshed and connected with the second differential bevel gears.

[0012] As a solution in the present invention, a central shaft sleeve is provided in the middle of the bridge shaft, and shock-absorbing springs are sleeved on the upper and lower sides of the central shaft sleeve and on the outer side of the bridge shaft.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The half-axle and the connecting sleeve are connected to form a retractable rod structure, which can adjust the overall length. When the connecting sleeve is connected to the wheel or reducer, the reserved connection distance is sufficient, which can reduce the use of connecting accessories and select lightweight connecting accessories accordingly, thereby reducing the weight of the entire electric drive axle and achieving lightweight electric drive axle.

[0015] 2. The bridge shaft can be connected to another differential to achieve four-wheel drive. The bridge shaft is retractable, and the shock-absorbing spring arranged on its outside makes the bridge shaft and the center sleeve have good telescopic elasticity. It has a certain structural strength and can buffer the influence of axial force, so that the interference between the two differentials is small. At the same time, the retractable structural design also makes the overall structure of the bridge shaft and the center sleeve light and light in weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a lightweight electric drive axle.

[0017] Figure 2 This is a schematic diagram of the overall connection structure of the half-shaft and connecting sleeve shaft in a lightweight electric drive axle.

[0018] Figure 3 This is a schematic diagram of the partial cross-section structure of the half-shaft and connecting sleeve shaft in a lightweight electric drive axle.

[0019] Figure 4 This is a schematic diagram of the structure of the bridge shaft in a lightweight electric drive axle.

[0020] In the figure: 1. Differential housing base; 2. End cover; 3. Differential main shaft; 4. Main shaft gear; 5. First transfer gear; 6. First connecting shaft; 7. First bevel gear; 8. Second bevel gear; 9. Second connecting shaft; 10. Motor; 11. Differential housing top cover; 12. Axle shaft; 13. First differential bevel gear; 14. Spring buckle; 15. Connecting sleeve shaft; 16. Buckle hole; 17. Buffer spring; 18. Second differential bevel gear; 19. Third connecting shaft; 20. Second transfer gear; 21. Bridge shaft; 22. Center shaft sleeve; 23. Shock absorber spring. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figures 1 to 4The embodiment of the present invention provides a lightweight electric drive axle, comprising: a differential housing base 1, an end cover 2 is installed below the differential housing base 1, and a differential main shaft 3 is connected through the inside of the differential housing base 1, a main shaft gear 4 is installed at the bottom of the differential main shaft 3, and the side of the main shaft gear 4 is meshed with a first transfer gear 5, a first connecting shaft 6 is connected below the first transfer gear 5, and a first bevel gear 7 is installed at the shaft end of the first connecting shaft 6, a second bevel gear 8 is meshed with the bottom of the first bevel gear 7, and the rear of the second bevel gear 8 is connected to the second connecting shaft 9, and the shaft end of the second connecting shaft 9 is connected to a motor 10, a differential housing top cover 11 is installed above the differential housing base 1, and the differential housing top cover 11 A half shaft 12 extends from the outside of the left and right sides, and a first differential bevel gear 13 is installed on the left and right sides of the inside of the differential housing top cover 11, and the first differential bevel gear 13 is installed on one end of the half shaft 12 located inside the differential housing top cover 11. A connecting sleeve 15 is sleeved on the outside of the end of the half shaft 12 away from the differential housing top cover 11, and spring buckles 14 are arranged at equal distances on the outer wall of the end of the half shaft 12 away from the differential housing top cover 11, and buckle holes 16 are arranged at equal distances through the outer wall of the connecting sleeve 15 close to the half shaft 12. The spring buckles 14 correspond to the buckle holes 16 in position, and the spring buckles 14 match the buckle holes 16 in size. A buffer spring 17 is provided on the inside of the connecting sleeve 15, and the half shaft 12 and the connecting sleeve 15 cooperate to form a telescopic structure;

[0023] Specifically, the half-shaft 12 and the connecting sleeve shaft 15 are connected to form a retractable rod-type structure, so the overall length can be adjusted, so that when connecting to the wheel or the reducer, the number of connecting accessories used can be reduced accordingly, and the selection can be more lightweight, thereby reducing the weight of the entire electric drive axle and achieving lightweight electric drive axle. The connecting sleeve shaft 15 and the half-shaft 12 are retracted and fixed by the spring buckle 14 and the buckle hole 16 spring engagement, which is convenient and quick to adjust the length. At the same time, a buffer spring 17 is also provided between the connecting sleeve shaft 15 and the half-shaft 12 to play the role of buffering, shock absorption, and connection strengthening.

[0024] A second differential bevel gear 18 is provided on the upper portion of the differential housing top cover 11, and a third connecting shaft 19 is connected to the upper portion of the second differential bevel gear 18. The upper ends of the differential main shafts 3 are meshed and connected to the first differential bevel gears 13 through bevel gear structures, and the first differential bevel gears 13 are meshed and connected to the second differential bevel gears 18.

[0025] Specifically, four bevel gears are provided inside the differential housing base 1 and the differential housing top cover 11, namely the bevel gear structure at the upper end of the differential main shaft 3, the first differential bevel gear 13, and the second differential bevel gear 18. The four bevel gears are meshed perpendicularly with each other to form a planetary gear set, which enables the left and right (or front and rear) drive wheels to rotate at different speeds.

[0026] The top end of the third connecting shaft 19 is connected to the second transfer gear 20, and the top end of the second transfer gear 20 is connected to the bridge shaft 21. A central sleeve 22 is provided in the middle of the bridge shaft 21, and shock-absorbing springs 23 are sleeved on the upper and lower sides of the central sleeve 22 and on the outside of the bridge shaft 21.

[0027] Specifically, the bridge shaft 21 is used to connect other components, such as a differential, to achieve four-wheel drive. The bridge shaft 21 is set to a telescopic structure, and the middle part is connected by a center sleeve 22, which can be telescoped along the axial direction of the center sleeve 22. The setting of the shock-absorbing spring 23 makes the telescopic structure composed of the bridge shaft 21 and the center sleeve 22 have good telescopic elasticity and a certain structural strength. It can buffer the influence of axial force, so that the interference between the two differentials is small. At the same time, the telescopic structural design also makes the overall structure of the bridge shaft 21 and the center sleeve 22 light and light in weight.

[0028] The working principle of this utility model is:

[0029] The motor 10 controls the rotation of the second bevel gear 8 through the second connecting shaft 9, and the first bevel gear 7 is then driven to rotate. Under the action of the first connecting shaft 6, the first transfer gear 5 is driven to rotate together, the main shaft gear 4 rotates, and the differential main shaft 3 rotates accordingly. At this time, the planetary gear set located inside the differential housing base 1 and the differential housing top cover 11 starts to operate, and the half shaft 12 and the second transfer gear 20 both start to rotate, so that the left and right (or front and rear) drive wheels rotate at different speeds. The half shaft 12 and the connecting sleeve shaft 15 are retractable. The half shaft 12 and the connecting sleeve shaft 15 are fixed in length by spring buckles 14 and buckle holes 15. When the connecting sleeve shaft 15 is connected to a wheel or a reducer, the reserved connection distance is sufficient, which can reduce the use of connecting accessories and can choose lightweight connecting accessories accordingly. At the same time, a set of differentials can be installed at the end of the bridge shaft 21 to realize the four-wheel drive of the car. The bridge shaft 21 is retractable and has good elasticity, which can buffer the effect of axial force, making the entire electric drive axle structure stable and light in weight.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lightweight electric drive axle, characterized in that: include: A differential housing base (1) is provided, wherein an end cover (2) is installed below the differential housing base (1), and a differential main shaft (3) is connected through the interior of the differential housing base (1), a main shaft gear (4) is installed at the bottom of the differential main shaft (3), and a first transfer gear (5) is meshedly connected to the side of the main shaft gear (4), a first connecting shaft (6) is connected below the first transfer gear (5), and a first bevel gear (7) is installed at the shaft end of the first connecting shaft (6), a second bevel gear (8) is meshedly connected below the first bevel gear (7), and a second connecting shaft (9) is connected to the rear of the second bevel gear (8), and a motor (10) is connected to the shaft end of the second connecting shaft (9), and a differential housing top cover is installed above the differential housing base (1). (11), and half shafts (12) extend from the left and right sides of the differential housing top cover (11), and first differential bevel gears (13) are installed on the left and right sides of the interior of the differential housing top cover (11), and the first differential bevel gear (13) is installed at one end of the half shaft (12) located inside the differential housing top cover (11), and a connecting sleeve shaft (15) is sleeved on the outer side of the end of the half shaft (12) away from the differential housing top cover (11), a second differential bevel gear (18) is arranged above the interior of the differential housing top cover (11), and a third connecting shaft (19) is connected above the second differential bevel gear (18), the top end of the third connecting shaft (19) is connected to a second transfer gear (20), and the top end of the second transfer gear (20) is connected to a bridge shaft (21).

2. The lightweight electric drive axle according to claim 1, characterized in that: Spring buckles (14) are arranged at equal distances on the outer wall of the end of the half shaft (12) away from the differential housing top cover (11), and buckle holes (16) are arranged at equal distances through the outer wall of the connecting sleeve shaft (15) close to the half shaft (12).

3. The lightweight electric drive axle according to claim 2, characterized in that: The positions of the spring buckle (14) and the buckle hole (16) correspond to each other, and the sizes of the spring buckle (14) and the buckle hole (16) match each other.

4. The lightweight electric drive axle according to claim 2, characterized in that: A buffer spring (17) is provided on the inner side of the connecting sleeve shaft (15), and the half shaft (12) and the connecting sleeve shaft (15) cooperate to form a telescopic structure.

5. The lightweight electric drive axle according to claim 1, characterized in that: The upper ends of the differential main shafts (3) are respectively meshed and connected with the first differential bevel gears (13) through bevel gear structures, and the first differential bevel gears (13) are respectively meshed and connected with the second differential bevel gears (18).

6. The lightweight electric drive axle according to claim 1, characterized in that: A central shaft sleeve (22) is provided in the middle of the bridge shaft (21), and shock-absorbing springs (23) are sleeved on the upper and lower sides of the central shaft sleeve (22) and on the outer side of the bridge shaft (21).

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