Differential mechanism for electric vehicle

Abstract

The utility model relates to the technical field of electric vehicle accessories, in particular to a differential mechanism for an electric vehicle, which comprises a shell, a sealing top cover and a differential mechanism assembly, the differential mechanism assembly is sleeved in the shell, and a bevel gear disc is arranged on one side of the differential mechanism assembly. An output shaft and an input shaft of the differential mechanism assembly are connected to the shell through bearings B. One end of the shell is sleeved with a driving shaft through a bearing A. A driving gear is arranged at the position, located in the shell, of one end of the driving shaft in a sleeved mode. Rectangular reserved openings are formed in the two sides of the top end of the shell, embedded rectangular copper sleeve shells are arranged in the rectangular reserved openings in a sleeved mode, and graphene heat dissipation blocks are arranged in the embedded rectangular copper sleeve shells in a sleeved mode. According to the differential mechanism for the electric vehicle, on the premise that the sealing performance is improved, the heat dissipation efficiency of the differential mechanism is greatly improved, the service life of the gear is prolonged, machine oil is conveniently and rapidly discharged, and replacement is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle accessories, in particular to a differential for an electric vehicle. Background Art

[0002] The differential for electric vehicles is an important part of the electric vehicle transmission system. It is mainly used to distribute torque and driving force between two drive devices (such as motors) to ensure that the vehicle can remain stable when turning. The working principle of the electric vehicle differential is mainly based on gear transmission and differential principles. The differential contains a driving gear, a driven gear and a differential housing. The driving gear is directly connected to the drive shaft, while the driven gear is connected to the two wheels through a half shaft. When the vehicle turns, the speed of the inner tire will be relatively low, while the speed of the outer tire will be relatively high. The function of the differential is to use the gear transmission between the driving gear and the driven gear so that the two wheels can still rotate independently at different speeds under differential conditions.

[0003] The existing differential for electric vehicles cannot improve the heat dissipation efficiency of the differential under the premise of improving the sealing performance, has a short service life, is not convenient for rapid discharge of mechanical oil, and is not convenient for replacement. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a differential for an electric vehicle. The differential for an electric vehicle greatly improves the heat dissipation efficiency of the differential while improving the sealing performance, prolongs the service life of the gears, and facilitates the rapid discharge of mechanical oil and replacement.

[0005] The technical solution adopted by the utility model to solve the technical problem is a differential for an electric vehicle, comprising a housing, a sealing top cover and a differential assembly, wherein the differential assembly is sleeved in the housing and a bevel gear plate is arranged on one side of the differential assembly, the output shaft and the input shaft of the differential assembly are connected to the housing through a bearing B, a driving shaft is sleeved at one end of the housing through a bearing A, and a driving gear is sleeved at one end of the driving shaft and located in the housing;

[0006] Rectangular reserved openings are provided on both sides of the top of the shell, and an embedded rectangular copper shell is sleeved in the rectangular reserved openings. A graphene heat sink is sleeved in the embedded rectangular copper shell, and heat-conducting copper tubes are welded at equal distances in the embedded rectangular copper shell, and the heat-conducting copper tubes pass through the graphene heat sink. Oil unloading screw holes are provided at both ends of the bottom of the shell, and sealing bolts are screwed into the oil unloading screw holes.

[0007] By adopting the above technical solution, the differential for electric vehicles greatly improves the heat dissipation efficiency of the differential while improving the sealing performance, prolongs the service life of the gears, and facilitates the rapid discharge of mechanical oil and replacement.

[0008] Specifically, a sealing top cover is installed on the top of the shell through butt bolts, and an embedded rubber plate is bonded to the bottom of the sealing top cover.

[0009] By adopting the above technical solution, the embedded rubber plate at the bottom of the sealing top cover is embedded into the shell when it is engaged, which greatly improves the sealing effect and is dust-proof and waterproof.

[0010] Specifically, the other end of the shell is connected to a connecting flange through a connecting column, and a connecting hole is provided on the connecting flange.

[0011] Specifically, the output shaft and the input shaft of the differential assembly are both welded with half-shaft connecting sleeves, and the half-shaft connecting sleeves are located outside the housing.

[0012] Specifically, a driving shaft connecting sleeve is welded to the other end of the driving shaft.

[0013] Specifically, the driving gear and the bevel gear plate are meshed with each other.

[0014] By adopting the above technical solution, the driving gear and the bevel gear plate are meshed with each other, thereby driving the internal gear of the differential assembly to rotate and change the speed.

[0015] Beneficial effects of the utility model:

[0016] (1) The utility model discloses a differential for electric vehicles, which is convenient for being sleeved on the half-axle of the rear axle of the electric vehicle by using a half-axle connecting sleeve, and convenient for being connected to the output shaft of the motor by using a driving shaft connecting sleeve. The motor is used to drive the driving gear to rotate. Since the driving gear and the bevel gear plate are meshed with each other, the internal gear of the differential assembly is driven to rotate and change the speed. Since the gears easily generate heat during rotation and the heat is dissipated in the cavity of the housing, the embedded rectangular copper housing is used to quickly absorb the heat in the gas in the housing.

[0017] (2) The utility model discloses a differential for electric vehicles, which utilizes a heat-conducting copper tube to evenly conduct heat to a graphene heat sink. Since the graphene heat sink is exposed to the air, it is easy to dissipate heat, greatly improving the heat dissipation efficiency of the differential and extending the service life of the gears. The embedded rubber plate at the bottom of the sealing top cover is embedded in the shell when engaged, which greatly improves the sealing effect and is dust-proof and waterproof. The oil discharge screw holes are provided at both ends of the bottom, and the internal sealing bolts can be removed to quickly discharge the mechanical oil and facilitate replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the shell of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the embedded rubber plate of the utility model.

[0022] In the figure: 1. Sealing top cover; 2. Housing; 3. Driving shaft; 4. Driving shaft connecting sleeve; 5. Bearing A; 6. Bearing B; 7. Half-shaft connecting sleeve; 8. Connecting column; 9. Connecting flange; 10. Oil unloading screw hole; 11. Sealing bolt; 12. Docking bolt; 13. Bevel gear plate; 14. Differential assembly; 15. Graphene heat sink; 16. Thermal copper tube; 17. Embedded rectangular copper sleeve; 18. Rectangular reserved opening; 19. Driving gear; 20. Embedded rubber plate. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] In order to improve the heat dissipation efficiency of the differential for electric vehicles while improving the sealing performance, the service life of the gears is extended, and the mechanical oil is discharged quickly and replaced easily. Figure 1-3 As shown, the utility model discloses a differential for electric vehicles, comprising a housing 2, a sealing top cover 1 and a differential assembly 14, wherein the housing 2 is sleeved with the differential assembly 14 and a bevel gear plate 13 is provided on one side of the differential assembly 14, the output shaft and the input shaft of the differential assembly 14 are connected to the housing 2 through a bearing B6, one end of the housing 2 is sleeved with a driving shaft 3 through a bearing A5, and one end of the driving shaft 3 is sleeved with a driving gear 19 located in the housing 2;

[0025] Rectangular reserved openings 18 are provided on both sides of the top of the shell 2, and an embedded rectangular copper shell 17 is sleeved in the rectangular reserved opening 18. A graphene heat sink 15 is sleeved in the embedded rectangular copper shell 17. Thermal copper tubes 16 are welded at equal distances in the embedded rectangular copper shell 17, and the thermal copper tubes 16 penetrate the graphene heat sink 15. Oil unloading screw holes 10 are provided at both ends of the bottom of the shell 2, and sealing bolts 11 are screwed into the oil unloading screw holes 10.

[0026] When in use, the differential for electric vehicles greatly improves the heat dissipation efficiency of the differential while improving the sealing performance, prolongs the service life of the gears, and facilitates the rapid discharge of mechanical oil and replacement.

[0027] For example, Figure 1 , 3As shown, the utility model also includes that a sealing top cover 1 is installed on the top of the housing 2 through a butt bolt 12 and an embedded rubber plate 20 is bonded to the bottom of the sealing top cover 1 .

[0028] When in use, the embedded rubber plate 20 at the bottom of the sealing top cover 1 is embedded into the housing 2 when engaged, which greatly improves the sealing effect and is dustproof and waterproof.

[0029] For example, Figure 1 As shown, the utility model also includes that the other end of the shell 2 is connected to a connecting flange 9 through a connecting column 8, and the connecting flange 9 is provided with a connecting hole.

[0030] When in use, the differential is connected to the vehicle body support via the connecting flange 9, which greatly improves the stability of the differential.

[0031] For example, Figure 1 , 2 As shown, the utility model also includes that the output shaft and the input shaft of the differential assembly 14 are both welded with half-shaft connecting sleeves 7 and the half-shaft connecting sleeves 7 are located outside the housing 2.

[0032] When in use, the driving shaft connecting sleeve 4 is used to facilitate connection to the output shaft of the motor.

[0033] For example, Figure 1 As shown, the utility model also includes that a driving shaft connecting sleeve 4 is welded to the other end of the driving shaft 3 .

[0034] When in use, the driving shaft connecting sleeve 4 is conveniently connected to the output shaft of the motor, and the motor is used to drive the driving gear 19 to rotate.

[0035] For example, Figure 2 As shown, the utility model also includes that the driving gear 19 and the bevel gear plate 13 are meshed with each other.

[0036] When in use, the driving gear 19 and the bevel gear plate 13 mesh with each other, thereby driving the internal gear of the differential assembly 14 to rotate and change the speed.

[0037] When the utility model is in use, the half-shaft connecting sleeve 7 is conveniently sleeved on the half-shaft of the rear axle of the electric vehicle, and the driving shaft connecting sleeve 4 is conveniently connected to the output shaft of the motor, and the motor is used to drive the driving gear 19 to rotate. Since the driving gear 19 and the bevel gear plate 13 are meshed with each other, the internal gear of the differential assembly 14 is driven to rotate to change the speed;

[0038] Since the gears easily generate heat during rotation and the heat is dissipated in the cavity of the housing 2, the embedded rectangular copper casing 17 is used to quickly absorb the heat in the gas in the housing 2, and the heat-conducting copper tube 16 is used to evenly conduct the heat to the graphene heat sink 15. Since the graphene heat sink 15 is exposed to the air, it is easy to dissipate the heat, which greatly improves the heat dissipation efficiency of the differential and prolongs the service life of the gears.

[0039] The embedded rubber plate 20 at the bottom of the sealing top cover 1 is embedded in the housing 2 when it is engaged, which greatly improves the sealing effect and is dust-proof and waterproof. The oil unloading screw holes 10 are provided at both ends of the bottom to remove the internal sealing bolts 11, which is convenient for quickly discharging the mechanical oil and easy for replacement.

[0040] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A differential for an electric vehicle, characterized in that: The invention comprises a housing (2), a sealing top cover (1) and a differential assembly (14); the housing (2) is provided with a differential assembly (14) and a bevel gear plate (13) is provided on one side of the differential assembly (14); the output shaft and the input shaft of the differential assembly (14) are connected to the housing (2) via a bearing B (6); a driving shaft (3) is provided on one end of the housing (2) via a bearing A (5); and a driving gear (19) is provided on one end of the driving shaft (3) and is located in the housing (2); Rectangular reserved openings (18) are provided on both sides of the top of the shell (2), and an embedded rectangular copper casing (17) is sleeved in the rectangular reserved opening (18), a graphene heat sink (15) is sleeved in the embedded rectangular copper casing (17), heat-conducting copper tubes (16) are welded at equal distances in the embedded rectangular copper casing (17), and the heat-conducting copper tubes (16) penetrate the graphene heat sink (15), and oil discharge screw holes (10) are provided at both ends of the bottom of the shell (2), and sealing bolts (11) are screwed into the oil discharge screw holes (10).

2. The differential for an electric vehicle according to claim 1, characterized in that: A sealing top cover (1) is installed on the top of the housing (2) via a butt bolt (12), and an embedded rubber plate (20) is bonded to the bottom of the sealing top cover (1).

3. The differential for an electric vehicle according to claim 1, characterized in that: The other end of the housing (2) is connected to a connecting flange (9) via a connecting column (8), and a connecting hole is provided on the connecting flange (9).

4. The differential for an electric vehicle according to claim 1, characterized in that: The output shaft and the input shaft of the differential assembly (14) are both welded with a half-shaft connecting sleeve (7), and the half-shaft connecting sleeve (7) is located outside the housing (2).

5. The differential for an electric vehicle according to claim 1, characterized in that: A driving shaft connecting sleeve (4) is welded to the other end of the driving shaft (3).

6. The differential for an electric vehicle according to claim 1, characterized in that: The driving gear (19) and the bevel gear plate (13) are meshed with each other.

Images