CN214838340U

CN214838340U - Drive axle assembly

Info

Publication number: CN214838340U
Application number: CN202120058555.7U
Authority: CN
Inventors: 贺双桂; 郭智敏
Original assignee: Zhuzhou Gear Co Ltd
Current assignee: Zhuzhou Gear Co Ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-11-23
Anticipated expiration: 2031-01-11

Abstract

Drive axle assembly, including driving motor, with the input shaft subassembly of driving motor transmission connection, with the intermediate shaft subassembly of the differential mechanism assembly transmission connection of drive car, its characterized in that: the middle shaft assembly is connected with a gear shifting executing mechanism, and the middle shaft assembly is driven by the gear shifting executing mechanism to be meshed with or separated from the input shaft assembly. The utility model discloses well jackshaft subassembly is driven and input shaft subassembly meshing or separation by the actuating mechanism that shifts, when the vehicle does not need motor drive, the actuating mechanism that shifts drives jackshaft subassembly and input shaft subassembly separation, jackshaft subassembly can not transmit operation power to the input shaft subassembly, can not drive driving motor idle running, avoid driving motor to drag idle running in the anti-of transaxle, energy loss has been reduced, vibration and noise have been reduced, guarantee input shaft subassembly and the coaxial meshing of jackshaft subassembly or the validity and the stability of separation, improve the use reliability of transaxle assembly.

Description

Drive axle assembly

Technical Field

The utility model relates to a drive axle assembly belongs to automotive drive power assembly technical field.

Background

The hybrid electric vehicle is an automobile with at least two power sources capable of running simultaneously, wherein the P4 hybrid electric vehicle is an automobile with one axle (generally a front axle) driven by a traditional internal combustion engine and the other axle (generally a rear axle) driven by a motor, and has the functions of pure electric drive mode vehicle running, engine drive vehicle running, hybrid drive vehicle running of an engine and a motor, braking energy recovery and the like. Compared with the traditional automobile driven by an internal combustion engine, the hybrid electric vehicle has the advantages that the oil consumption and the emission level are greatly improved, and the hybrid electric vehicle has great significance for environmental protection and energy conservation. Because the motor has good speed regulation performance, a speed changer is not arranged between the motor and the drive axle, and a speed reducer with a certain speed ratio is arranged between the motor and the drive axle. The existing speed reducer is not provided with a disconnecting mechanism, when an engine drives a vehicle to run, a motor does not work and generate power, but because the motor is not disconnected from a drive axle, the motor is dragged down to idle in the reverse direction of the drive axle, and when the vehicle speed is higher, the idle rotation of the motor can cause the problems of dragging energy loss, vibration, noise and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drive axle assembly, when the vehicle does not need motor drive, actuating mechanism shifts drives jackshaft subassembly and input shaft subassembly separation, the jackshaft subassembly can not be with operation power transmission to input shaft subassembly, can not drive driving motor idle running, avoid driving motor to drag idle running in the anti-of drive axle, energy loss has been reduced, vibration and noise have been reduced, guarantee input shaft subassembly and the coaxial meshing of jackshaft subassembly or the validity and the stability of separation, improve the use reliability of drive axle assembly.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

drive axle assembly, including driving motor, with the input shaft subassembly of driving motor transmission connection, with the intermediate shaft subassembly of the differential mechanism assembly transmission connection of drive car, its characterized in that: the middle shaft assembly is connected with a gear shifting executing mechanism, and the middle shaft assembly is driven by the gear shifting executing mechanism to be meshed with or separated from the input shaft assembly.

Preferably, the input shaft assembly comprises an input shaft connected with a transmission shaft of the driving motor, a first-stage reduction driving gear coaxially sleeved on the input shaft and a first-stage reduction driven gear meshed with the first-stage reduction driving gear, and the intermediate shaft assembly is driven by the gear shifting executing mechanism to be coaxially meshed or separated with the first-stage reduction driven gear.

Preferably, the intermediate shaft assembly comprises an intermediate shaft, a second-stage reduction driven gear which is coaxially fixed on the intermediate shaft and is meshed with the second-stage reduction driving gear and is in transmission connection with the differential assembly, and a synchronizer which is movably arranged on the intermediate shaft, is connected with the gear shifting executing mechanism and is coaxially meshed with or separated from the first-stage reduction driven gear along with the movement of the gear shifting executing mechanism.

Preferably, the intermediate shaft passes through the first-stage reduction driven gear along the central axis and is not in contact with the first-stage reduction driven gear, and the synchronizer is coaxially aligned with the first-stage reduction driven gear.

Preferably, the primary speed reduction driven gear is fixed with a meshing connecting ring, the meshing connecting ring is coaxially arranged on one side of the primary speed reduction driven gear, which is close to the synchronizer, and the synchronizer is coaxially meshed with the meshing connecting ring or separated from the meshing connecting ring along with the movement of the gear shifting executing mechanism.

Preferably, the gear shifting executing mechanism comprises a gear shifting executing motor and a gear shifting moving component in transmission connection with the gear shifting executing motor, and the gear shifting moving component is fixed with the synchronizer and drives the synchronizer to move along the intermediate shaft to be coaxially engaged with or separated from the first-stage reduction driven gear.

Preferably, the gear shifting motion assembly comprises a screw rod connected with the gear shifting execution motor and a nut matched and sleeved on the screw rod, and the nut and the synchronizer are coaxially fixed.

The utility model has the advantages that:

1. the utility model discloses a drive axle assembly, when the vehicle needs motor drive, the actuating mechanism that shifts drives intermediate shaft subassembly and input shaft subassembly meshing, and driving motor drives input shaft subassembly operation, and input shaft subassembly drives the operation of intermediate shaft subassembly, and the operation of intermediate shaft subassembly drive differential mechanism assembly is in order to drive the vehicle; when the vehicle does not need motor drive, the actuating mechanism that shifts drives jackshaft subassembly and input shaft subassembly separation, and the jackshaft subassembly can not drive driving motor idle running with operation power transmission to input shaft subassembly, can not drive driving motor idle running, avoids driving motor to drag idle running in the anti-of transaxle, has reduced energy loss, has reduced vibration and noise.

2. Synchronizer and the coaxial alignment of one-level speed reduction driven gear among the intermediate shaft subassembly, the coaxial meshing go-between that is fixed with on the one-level speed reduction driven gear, synchronizer axial motion and meshing go-between meshing or separation, and the cooperation through lead screw and nut drives synchronizer axial motion, the motion displacement and the accurate stability of direction of synchronizer, guarantee input shaft subassembly and the coaxial meshing of intermediate shaft subassembly or the validity and the stability of separation, improve the use reliability of drive axle assembly.

Drawings

Fig. 1 is a schematic view of the connection between the drive axle assembly and the differential assembly according to the present invention.

Fig. 2 is a schematic view of a shift actuator.

Detailed Description

The following describes embodiments of the present invention in detail with reference to fig. 1 to 2.

The drive axle assembly comprises a drive motor 1, an input shaft assembly 2 in transmission connection with the drive motor 1, and an intermediate shaft assembly 3 in transmission connection with a differential assembly 4 of a drive automobile, and is characterized in that: the intermediate shaft assembly 3 is connected with a gear shifting actuating mechanism 5, and the intermediate shaft assembly 3 is driven by the gear shifting actuating mechanism 5 to be meshed with or separated from the input shaft assembly 2.

When the vehicle needs to be driven by the motor, the gear shifting executing mechanism 5 drives the intermediate shaft component 3 to be meshed with the input shaft component 2, the driving motor 1 drives the input shaft component 2 to operate, the input shaft component drives the intermediate shaft component 3 to operate, and the intermediate shaft component 3 drives the differential mechanism assembly 5 to operate so as to drive the vehicle; when the vehicle does not need motor drive, shift actuating mechanism 5 drives jackshaft subassembly 3 and the separation of input shaft subassembly 2, jackshaft subassembly 3 can not drive driving motor 1 idle running with operation power transmission to input shaft subassembly 2, can not drive idle running, avoids driving motor to drag idle running in the anti-of transaxle, has reduced energy loss, has reduced vibration and noise.

The input shaft assembly 2 comprises an input shaft 21 connected with a transmission shaft of the driving motor 1, a first-stage speed reduction driving gear 22 coaxially sleeved on the input shaft 21 and a first-stage speed reduction driven gear 23 meshed with the first-stage speed reduction driving gear 22, and the intermediate shaft assembly 3 is driven by the gear shifting executing mechanism 5 to be coaxially meshed or separated with the first-stage speed reduction driven gear 23. The driving motor 1 operates to drive the input shaft 21 to operate, the input shaft 21 drives the first-stage reduction driving gear 22 and the first-stage reduction driven gear 23 to synchronously move, and when the intermediate shaft assembly 3 is coaxially meshed with the first-stage reduction driven gear 23, the first-stage reduction driven gear 23 drives the intermediate shaft assembly 3 to operate, so that the differential assembly 4 operates to drive the automobile; when the driving motor does not operate, the gear shifting actuating mechanism 5 drives the intermediate shaft assembly 3 to be separated from the first-stage reduction driven gear 23, the operation power of the differential mechanism assembly 4 cannot be transmitted to the input shaft assembly 2, the driving motor 1 cannot be driven to idle, and the driving motor 1 remains motionless.

The intermediate shaft assembly 3 includes an intermediate shaft 31, a second reduction driving gear 32 coaxially fixed on the intermediate shaft 31, a second reduction driven gear 33 engaged with the second reduction driving gear 32 and in transmission connection with the differential assembly 4, and a synchronizer 34 movably mounted on the intermediate shaft 31, wherein the synchronizer 34 is connected with the shift execution mechanism 5 and is coaxially engaged with or disengaged from the first reduction driven gear 23 along with the movement of the shift execution mechanism 5. When synchronizer 34 on the intermediate shaft 31 is coaxially engaged with the first-stage reduction driven gear 23, the intermediate shaft 31 is driven to rotate, so that the second-stage reduction driving gear 32 and the second-stage reduction driven gear 33 are driven to synchronously rotate, and the rotation of the second-stage reduction driven gear 33 drives the differential assembly 4 to rotate, so that the power transmission between the driving motor 1 and the differential assembly 4 is realized, and the automobile is driven. If the synchronizer 34 is separated from the first-stage reduction driven gear 23, the differential assembly 4 cannot drive the driving motor 1 to synchronously idle when being driven by the engine to operate, the power transmission is disconnected, the driving motor 1 is prevented from being dragged down reversely by the drive axle to idle, the energy loss is reduced, and the vibration and the noise are reduced.

The intermediate shaft 31 passes through the first-stage reduction driven gear 23 along the central axis and is not in contact with the first-stage reduction driven gear 23, and the synchronizer 34 is coaxially aligned with the first-stage reduction driven gear 23. The synchronizer 34 is coaxially arranged at the side edge of the first-stage reduction driven gear 23, so that the synchronizer can be coaxially meshed with or separated from the first-stage reduction driven gear 23, and the timeliness and the reliability of state conversion are higher.

The meshing connecting ring 23.1 is fixed on the first-stage reduction driven gear 23, the meshing connecting ring 23.1 is coaxially arranged on one side, close to the synchronizer 34, of the first-stage reduction driven gear 23, and the synchronizer 34 is coaxially meshed with the meshing connecting ring 23.1 or separated from the meshing connecting ring 23.1 along with the movement of the gear shifting executing mechanism 5. The synchronizer 34 is moved by the shift actuator 5 into and out of coaxial engagement with the engagement connecting ring 23.1.

The gear shifting actuating mechanism 5 comprises a gear shifting actuating motor 51 and a gear shifting moving assembly 52 in transmission connection with the gear shifting actuating motor 51, wherein the gear shifting moving assembly 52 is fixed with the synchronizer 34 and drives the synchronizer 34 to move along the intermediate shaft 31 to be coaxially meshed with or separated from the first-stage reduction driven gear 23. The shifting movement assembly 52 drives the synchronizer 34 to axially move on the intermediate shaft 31 to be engaged with or disengaged from the engaging connecting ring 23.1, and the shifting execution motor 51 provides power for the movement of the shifting movement assembly 52.

The shifting movement assembly 52 comprises a screw rod 52.1 connected with the shifting execution motor 51 and a nut 52.2 matched and sleeved on the screw rod 52.1, and the nut 52.2 is coaxially fixed with the synchronizer 34. The linear movement of the nut 52.2 on the spindle 52.1 drives the synchronizer 34 to move axially on the intermediate shaft.

The synchronizer 34 is coaxially aligned with the first-stage reduction driven gear 23, the meshing connecting ring 23.1 is coaxially fixed on the first-stage reduction driven gear 23, the synchronizer 34 axially moves to be meshed with or separated from the meshing connecting ring 23.1, the synchronizer 34 is driven to axially move through the matching of the screw rod 52.1 and the nut 52.2, the movement displacement and the direction of the synchronizer 34 are accurate and stable, the effectiveness and the stability of coaxial meshing or separation of the input shaft assembly 2 and the intermediate shaft assembly 3 are guaranteed, and the use reliability of the drive axle assembly is improved.

The technical solutions of the embodiments of the present invention are completely described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Claims

1. Drive axle assembly, including driving motor (1), input shaft subassembly (2) of being connected with driving motor (1) transmission, with intermediate shaft subassembly (3) of driving automobile's differential mechanism assembly (4) transmission connection, its characterized in that: the middle shaft assembly (3) is connected with a gear shifting executing mechanism (5), and the middle shaft assembly (3) is driven by the gear shifting executing mechanism (5) to be meshed with or separated from the input shaft assembly (2).

2. The drive axle assembly of claim 1, wherein: the input shaft assembly (2) comprises an input shaft (21) connected with a transmission shaft of the driving motor (1), a first-stage speed reduction driving gear (22) coaxially sleeved on the input shaft (21) and a first-stage speed reduction driven gear (23) meshed with the first-stage speed reduction driving gear (22), and the middle shaft assembly (3) is driven by the gear shifting executing mechanism (5) to be coaxially meshed or separated with the first-stage speed reduction driven gear (23).

3. The drive axle assembly of claim 2, wherein: the intermediate shaft assembly (3) comprises an intermediate shaft (31), a secondary speed reduction driving gear (32) coaxially fixed on the intermediate shaft (31), a secondary speed reduction driven gear (33) meshed with the secondary speed reduction driving gear (32) and in transmission connection with the differential assembly (4), and a synchronizer (34) movably arranged on the intermediate shaft (31), wherein the synchronizer (34) is connected with the gear shifting executing mechanism (5) and is coaxially meshed or separated with the primary speed reduction driven gear (23) along with the movement of the gear shifting executing mechanism (5).

4. The drive axle assembly of claim 3, wherein: the intermediate shaft (31) penetrates through the first-stage reduction driven gear (23) along the central axis and is not in contact with the first-stage reduction driven gear (23), and the synchronizer (34) is coaxially aligned with the first-stage reduction driven gear (23).

5. The drive axle assembly of claim 4, wherein: the primary speed reduction driven gear (23) is fixedly provided with a meshing connecting ring (23.1), the meshing connecting ring (23.1) is coaxially arranged on one side, close to the synchronizer (34), of the primary speed reduction driven gear (23), and the synchronizer (34) is coaxially meshed with the meshing connecting ring (23.1) or separated from the meshing connecting ring (23.1) along with the movement of the gear shifting executing mechanism (5).

6. The drive axle assembly of claim 3, wherein: the gear shifting executing mechanism (5) comprises a gear shifting executing motor (51) and a gear shifting moving component (52) in transmission connection with the gear shifting executing motor (51), wherein the gear shifting moving component (52) is fixed with the synchronizer (34) and drives the synchronizer (34) to move along the intermediate shaft (31) to be coaxially meshed or separated with the first-stage reduction driven gear (23).

7. The drive axle assembly of claim 6, wherein: the gear shifting motion assembly (52) comprises a screw rod (52.1) connected with a gear shifting execution motor (51) and a nut (52.2) sleeved on the screw rod (52.1) in a matching mode, and the nut (52.2) and the synchronizer (34) are coaxially fixed.