CN210553941U

CN210553941U - Coaxial motor axle assembly with cooling device

Info

Publication number: CN210553941U
Application number: CN201921360087.8U
Authority: CN
Inventors: 冯兴双; 廖可新
Original assignee: Hubei Axle Co ltd
Current assignee: Hubei Axle Co ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-05-19
Anticipated expiration: 2029-08-21

Abstract

The utility model relates to an axle field of making discloses a coaxial motor axle assembly with cooling device, including the axle casing, rotate first output shaft and the second output shaft of connection in the axle casing, connect the driving motor on the axle casing, be provided with the lumen that supplies first output shaft to pass in the motor shaft, be provided with the inner chamber that supplies the drive mechanism embedding on the axle casing, be provided with the oil groove that connects that collects to the lubricating oil that splashes on the inner chamber, be provided with on the inner chamber and be located oil-out and the oil return opening that connects in the oil groove, axle casing outer wall is provided with and connects the oil-out and the below on the oil groove to connect the top to carry out the cold oil pipeline that feeds through. The utility model has the advantages of it is following and effect: the motor is arranged on the axle and is coaxial with the output shaft, so that the transmission efficiency is improved; the inner wall of the inner cavity is provided with the oil receiving grooves, and the outer wall of the axle shell is provided with the cold oil pipeline which communicates the two adjacent oil receiving grooves, so that the lubricating oil is cooled, and the pump is saved.

Description

Coaxial motor axle assembly with cooling device

Technical Field

The utility model relates to a field is made to the axle, in particular to coaxial motor axle assembly with cooling device.

Background

The automobile axle is also called as axle, and is connected with the frame or the bearing type automobile body through the suspension, and wheels are arranged at the two ends of the automobile axle. The axle is used for bearing the load of the automobile and maintaining the normal running of the automobile on the road.

A chinese patent with application publication No. CN109421524A discloses an electric axle assembly, which comprises a driving motor, a speed reducer, a differential, a left half shaft, a right half shaft and a wheel end; the driving motor is connected between the left axle housing and the right axle housing; the speed reducer and the differential are arranged in the left axle housing, and the speed reducer is matched with the differential; the output shaft of the driving motor is a cavity gear shaft integrated with a primary driving gear and is connected with the speed reducer; the left half shaft connects the differential with the left wheel end; and the right half shaft penetrates through an output shaft cavity of the driving motor to connect the differential with the right wheel end.

But above-mentioned utility model anyhow has the defect, when the vehicle was gone for a long time or operating condition is abominable, lubricated overheated condition can appear in the lubricating oil in the axle transmission system, seriously influences the performance of axle.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a coaxial motor axle assembly with cooling device has and carries out quick radiating effect to lubricating oil.

The above technical purpose of the present invention can be achieved by the following technical solutions: a coaxial motor axle assembly with a cooling device comprises an axle shell, a first output shaft and a second output shaft which are rotatably connected in the axle shell, and a driving motor connected on the axle shell, wherein a motor rotating shaft of the driving motor is coaxial with the first output shaft and the second output shaft, a shaft cavity for the first output shaft to pass through is arranged on the motor rotating shaft, a differential mechanism is arranged in the axle shell, one end of the first output shaft, which extends out of the motor rotating shaft, and one end of the second output shaft, which extends into the axle shell, are respectively inserted into two ends of the differential mechanism, a transmission mechanism for transmitting the torque of the motor rotating shaft to the differential mechanism is arranged in the axle shell, an inner cavity for embedding the transmission mechanism is arranged on the axle shell, lubricating oil is arranged in the inner cavity, a plurality of oil receiving grooves which are uniformly distributed on the side wall of the inner cavity and used for collecting the splashed lubricating oil, the inner cavity is provided with an oil outlet and an oil return port which are positioned in the oil receiving grooves, and the outer wall of the axle shell is provided with a cold oil pipeline which is positioned between two adjacent oil receiving grooves and is communicated with the oil outlet positioned on the oil receiving groove above and the oil return port positioned on the oil receiving groove below.

The utility model discloses a further set up to: drive mechanism is including setting up the motor shaft stretches into the first drive gear of inner chamber one end, rotate connect in the transmission pivot of inner chamber, transmission pivot one end be provided with the second drive gear that first drive gear meshes mutually, the transmission pivot other end is provided with third drive gear, fixedly connected with on the differential mechanism casing with the fourth drive gear that third drive gear meshes mutually, first drive gear pitch diameter is less than second drive gear pitch diameter, third drive gear pitch diameter is less than fourth drive gear pitch diameter.

The utility model discloses a further set up to: and a gap is formed between the oil receiving groove and the fourth transmission gear.

The utility model discloses a further set up to: the outer wall of the axle shell is provided with a cooling water tank, the cooling water tank is communicated with a water spray pipeline positioned on the outer side of the cold oil pipeline, the water spray pipeline is provided with a plurality of water spray ports, the water spray ports are connected with water spray nozzles, the cooling water tank is communicated with the water spray pipeline, the water spray pipeline is provided with a water spray pump, and the cooling water tank is provided with a water replenishing port.

The utility model discloses a further set up to: and a temperature sensor immersed in the lubricating oil is arranged in the inner cavity, the temperature sensor and the water spray pump are connected with an automatic vehicle control system, and when the temperature of the lubricating oil is too high, the control system starts the water spray pump to spray water to the cold oil pipeline.

The utility model discloses a further set up to: and a support frame for the water spraying pipeline to penetrate through and support the water spraying pipeline is arranged on the axle shell.

The utility model discloses a further set up to: a gap is arranged between the cold oil pipeline and the outer wall of the axle shell.

The utility model has the advantages that:

1. the motor is arranged on the axle and is kept coaxial with the output shaft, and the torque of the driving motor is transmitted to the first output shaft and the second output shaft through the transmission mechanism, so that the length of a transmission chain is reduced, the transmission efficiency is improved, and the energy consumption is reduced; set up at the inner chamber inner wall and connect the oil groove, connect and set up oil-out and oil return opening in the oil groove, axle housing outer wall sets up the cold oil pipeline that connects the oil groove intercommunication with adjacent two, drive gear in the inner chamber rotates the lubricating oil that drives in the inner chamber and splashes, the lubricating oil that splashes falls into all slotted, lubricating oil is located the oil return opening that connects the oil groove below because the oil-out is followed along cold oil pipeline flow direction to the action of gravity, the heat of lubricating oil is taken away to the in-process air that lubricating oil flows in the cold oil pipeline that is located axle housing outer wall, the realization is to the cooling of lubricating oil, the.

2. The torque of the driving motor is transmitted to the fourth transmission gear through gear transmission, and the torque is transmitted to the first output shaft and the second output shaft through the differential fixedly connected with the fourth transmission gear, so that the transmission is more stable, and the driving traction force is improved.

3. Connect and set up the clearance between oil groove and fourth drive gear, avoid fourth drive gear to rotate the in-process and connect the oil groove to bump, improved the stability and the security of device.

4. The outer wall of the axle shell is provided with the cooling water tank, the cooling water tank is communicated with the water spraying pipeline, and cooling water in the cooling water tank is sprayed out from the water spray nozzle to the cold oil pipeline through the water spraying valve arranged on the water spraying pipeline, so that the cooling effect is improved.

5. Through linking to each other the control system who sets up temperature sensor and the water jet pump in the inner chamber and vehicle, realize when lubricating oil high temperature, when the forced air cooling of cold oil pipeline can't satisfy the cooling effect, vehicle automatic control system control water jet valve opens and spouts water in order to improve the cooling effect to cold oil pipeline.

6. Set up the support frame on the axle casing and support the spray pipe, improved spray pipe's stability.

7. A gap is formed between the cold oil pipeline and the inner wall of the axle shell, so that the contact area of the cold oil pipeline and air is increased, and the cooling effect is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic diagram of the present embodiment.

Fig. 2 is a sectional view of the present embodiment.

FIG. 3 is a diagram showing the positional relationship of the oil receiving groove in the present embodiment.

FIG. 4 is a diagram showing the positional relationship among the cooling water tank, the cold oil pipe, and the water spray pipe according to the present embodiment.

Fig. 5 is an enlarged view of the embodiment a.

In the drawings, 1, an axle housing; 11. an inner cavity; 12. an oil receiving groove; 121. an oil outlet; 122. an oil return port; 2. a drive motor; 21. a first output shaft; 22. a second output shaft; 23. a motor shaft; 231. a first drive gear; 24. a transmission rotating shaft; 241. A first ball bearing; 242. a third transmission gear; 243. a second transmission gear; 3. a cooling water tank; 31. a water spray pipe; 311. a water jet pump; 312. a water jet; 313. a water mist nozzle; 32. a support frame; 33. a water replenishing port; 4. a cold oil pipe; 5. A differential mechanism; 51. a first ball bearing; 52. and a fourth transmission gear.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the embodiment, a coaxial motor axle assembly with a cooling device is shown in fig. 1 and fig. 2, and includes an axle housing 1, a driving motor 2 is disposed on the axle housing 1, two ends of the driving motor 2 are connected to the axle housing 1 through flanges, an inner cavity 11 is disposed in the axle housing 1, a differential 5 is rotatably connected in the inner cavity 11, two ends of the differential 5 are sleeved with a first ball bearing, a first bearing seat for embedding the ball bearing is disposed in the inner cavity 11, the differential 5 is rotatably connected to the axle housing 1 through the first bearing seat, so as to reduce friction resistance, two ends of the differential 5 are respectively connected with a first output shaft 21 and a second output shaft 22 through splines, a fourth transmission gear 52 is bolted to the housing of the differential 5, an axle cavity is disposed on a motor shaft 23 of the driving motor 2, the first output shaft 21 penetrates through the axle cavity, and a first transmission gear 231, the transmission rotating shaft 24 is arranged in the inner cavity 11, two ends of the transmission rotating shaft 24 are sleeved with ball bearings II, a bearing seat II for embedding the ball bearings II is arranged in the inner cavity 11, the transmission rotating shaft 24 is rotatably connected with the axle shell 1 through the ball bearings II, friction resistance is reduced, the transmission rotating shaft 24 is provided with a second transmission gear 243 meshed with the first transmission gear 231 and a third transmission gear 242 meshed with the fourth transmission gear 52, the indexing and the diameter of the first transmission gear 231 are smaller than the diameter of the reference circle of the second transmission gear 243, and the diameter of the reference circle of the third transmission gear 242 is smaller than the diameter of the reference circle of the fourth transmission gear 52.

As shown in fig. 3, 4 and 5, a plurality of oil receiving grooves 12 are uniformly distributed on the side wall of the inner cavity 11 along the inner wall, an oil outlet 121 and an oil return opening 122 which are positioned on the axle housing 1 are arranged in the oil receiving groove 12, only the oil outlet 121 is arranged in the uppermost oil receiving groove 12, a plurality of cold oil pipelines 4 are arranged on the axle housing 1, the oil outlet 121 in the upper oil receiving groove 12 is communicated with the oil return opening 122 of the adjacent oil groove 12 positioned below by the cold oil pipeline 4, the oil return opening 122 is arranged on the axle housing 1 and is positioned at the lower end of each groove, the oil return opening 122 is communicated with the oil outlet 121 arranged in the adjacent oil groove 12 through the cold oil pipeline 4, the axle housing 1 is provided with a cooling water tank 3, the lower end of the cooling water tank 3 is communicated with a water spray pipeline 31, the water spray pipeline 31 surrounds the outer side of the cold oil pipeline 4, and a gap, the axle housing 1 is provided with a support frame 32 for the water spray pipe 31 to pass through and support the water spray pipe 31, the water spray pipe 31 is provided with a water spray pump 311 positioned at the bottom of the cooling water tank 3, and the upper end of the cooling water tank 3 is provided with a water replenishing port 33.

When the axle works, a motor rotating shaft 23 of a driving motor 2 rotates and is meshed with a second transmission gear 243 through a first transmission gear 231, a third transmission gear 242 is meshed with a fourth transmission gear 52 fixedly connected to a differential 5 to transmit torque to a first output shaft 21 and a second output shaft 22, so that the rotation of a driving wheel is realized, an inner cavity 11 is arranged in an axle shell 1, lubricating oil is embedded in the inner cavity, when the gears rotate, the lubricating oil splashes to the side wall of the inner cavity 11 through the rotation of the gears, the lubricating oil flows into an oil receiving groove 12, a gap exists between the oil receiving groove 12 and the fourth transmission gear 52, so that the oil receiving groove 12 is prevented from colliding with the fourth transmission gear 52, the lubricating oil in the oil receiving groove 12 flows from the oil receiving groove 12 at a high position to the oil receiving groove 12 at a low position through a cold oil pipeline 4 under the action of gravity, the heat dissipation of the lubricating oil is realized in, when the cold oil pipeline 4 can not fully dissipate heat, the temperature sensor arranged in the inner cavity 11 transmits a signal to an automatic control system of the vehicle, the automatic control system controls the water spray pump 311 to be started, and the water spray nozzle 313 sprays water mist to the cold oil pipeline 4, so that the cooling effect is improved.

Claims

1. A coaxial motor axle assembly with a cooling device comprises an axle housing (1), a first output shaft (21) and a second output shaft (22) which are rotatably connected in the axle housing (1), and a driving motor (2) connected on the axle housing (1), wherein a motor rotating shaft (23) of the driving motor (2) is coaxial with the first output shaft (21) and the second output shaft (22), a shaft cavity for the first output shaft (21) to pass through is arranged on the motor rotating shaft (23), a differential (5) is arranged in the axle housing (1), one end of the first output shaft (21) extending out of the motor rotating shaft (23) and one end of the second output shaft (22) extending into the axle housing (1) are respectively inserted into two ends of the differential (5), and a transmission mechanism for transmitting the torque of the motor rotating shaft (23) to the differential (5) is arranged in the axle housing (1), be provided with the confession on axle casing (1) inner chamber (11) of drive mechanism embedding, be provided with lubricating oil in inner chamber (11), be provided with a plurality of delays on inner chamber (11) lateral wall evenly distributed carries out the oil groove (12) that connects of collecting to the lubricating oil that splashes, be provided with on inner chamber (11) and be located connect oil-out (121) and oil return opening (122) in oil groove (12), axle casing (1) outer wall is provided with and is located adjacent two connect oil-out (121) on oil groove (12) and be located below and connect oil return opening (122) on oil groove (12) to carry out cold oil pipeline (4) that communicate between oil groove (12).

2. The coaxial motor axle assembly with the cooling device of claim 1, wherein: the transmission mechanism is including setting up motor shaft (23) stretches into first drive gear (231), the rotation of inner chamber (11) one end connect in the transmission pivot (24) of inner chamber (11), transmission pivot (24) one end be provided with second drive gear (243) that first drive gear (231) meshed, the transmission pivot (24) other end is provided with third drive gear (242), fixedly connected with on differential mechanism (5) casing with fourth drive gear (52) that third drive gear (242) meshed mutually, first drive gear (231) reference circle diameter is less than second drive gear (243) reference circle diameter, third drive gear (242) reference circle diameter is less than fourth drive gear (52) reference circle diameter.

3. The coaxial motor axle assembly with the cooling device of claim 2, wherein: a gap is arranged between the oil receiving groove (12) and the fourth transmission gear (52).

4. The coaxial motor axle assembly with the cooling device of claim 1, wherein: the outer wall of the axle shell (1) is provided with a cooling water tank (3), the cooling water tank (3) is communicated with a water spray pipeline (31) located at the outer side of the cold oil pipeline (4), the water spray pipeline (31) is provided with a plurality of water spray nozzles (312), the water spray nozzles are connected with water spray nozzles (313), the cooling water tank (3) is communicated with the water spray pipeline (31), the water spray pipeline (31) is provided with a water spray pump (311), and the cooling water tank (3) is provided with a water replenishing opening (33).

5. The coaxial motor axle assembly with the cooling device of claim 4, wherein: and a temperature sensor immersed in lubricating oil is arranged in the inner cavity (11), the temperature sensor and the water spray pump (311) are connected with an automatic vehicle control system, and when the temperature of the lubricating oil is too high, the control system starts the water spray pump (311) to spray water to the cold oil pipeline (4).

6. The coaxial motor axle assembly with the cooling device of claim 4, wherein: and a support frame (32) for the water spraying pipeline (31) to penetrate through and support the water spraying pipeline (31) is arranged on the axle shell (1).

7. The coaxial motor axle assembly with the cooling device of claim 1, wherein: a gap is arranged between the cold oil pipeline (4) and the outer wall of the axle shell (1).