Differential integrated mounting structure and vehicle
By integrating the differential housing onto the engine block and employing a main oil circuit and branch oil circuit design, the problem of designing the transmission shaft angle caused by the difference in half-shaft length in hybrid systems has been solved, thereby improving power transmission efficiency and overall vehicle performance.
Patent Information
- Application Number
- CN202423317705.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In hybrid systems, when the length of the range extender assembly engine is greater than that of the hybrid gearbox, it results in a large difference in the length of the left and right half shafts, affecting the design of the drive shaft angle, which is difficult to solve effectively with existing technologies.
The differential housing is integrated into the engine block and integrally formed with the engine block through casting. It combines the main oil circuit and branch oil circuit design, uses a one-way control valve to control the direction of lubricating oil, ensures sufficient lubrication and cooling of the friction pair, and adopts a sealing structure to prevent oil leakage.
It achieves a symmetrical layout of the left and right half shafts, reduces torque offset and the difficulty of designing the drive shaft angle, improves power transmission efficiency and vehicle performance, reduces energy consumption and extends the service life of the differential.
Smart Images
Figure CN223559473U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to differential mechanism technical field, especially a differential mechanism integrated type mounting structure and vehicle. BACKGROUND
[0002] In the hybrid system, the differential mechanism is usually integrated on the side of the hybrid box, and this design can improve the power transmission efficiency and space utilization. However, when the engine length of the range extender assembly is greater than the hybrid box, it will cause a large difference in the length of the left and right half shafts, thereby affecting the design of the transmission shaft angle. SUMMARY
[0003] The utility model discloses a differential mechanism integrated type mounting structure and vehicle, to solve the technical problem of the prior art in the length difference of left and right half shafts and the difficulty in the design of the short half shaft transmission shaft angle.
[0004] In the first aspect, the utility model provides a differential mechanism integrated type mounting structure, include:
[0005] Engine cylinder body;
[0006] Differential mechanism shell, the differential mechanism shell with the engine cylinder body fixed connection, the differential mechanism shell has the accommodation cavity in, be equipped with differential mechanism, drive motor gear shaft and power transmission spare in the accommodation cavity, power transmission spare is connected to differential mechanism and drive motor gear shaft respectively.
[0007] The differential mechanism integrated type mounting structure as described above, wherein, preferably, the differential mechanism shell has a main oil path and a plurality of branch oil paths, one end of each of the plurality of branch oil paths is in communication with the main oil path, and the other end of each of the plurality of branch oil paths is configured to cooperate with a friction pair to be lubricated, a one-way control valve is provided on the main oil path, and the one-way control valve is configured to communicate the main oil path and the branch oil path upon receiving a control signal.
[0008] The differential mechanism integrated type mounting structure as described above, wherein, preferably, the power transmission spare includes an intermediate shaft, a primary gear and a secondary gear, the primary gear and the secondary gear are sequentially sleeved on the intermediate shaft along the axial direction of the intermediate shaft, the primary gear is in transmission connection with the drive motor gear shaft, and the secondary gear is in transmission connection with the differential mechanism.
[0009] The differential integrated mounting structure as claimed in any one of the above, wherein preferably, the differential housing comprises a bottom shell and a cover, the bottom shell and the cover jointly form the accommodating cavity, a side of the bottom shell facing the cover is formed with a first sealing surface, a side of the cover facing the cover is formed with a second sealing surface, and the first sealing surface and the second sealing surface are connected in abutment when the cover is mounted on the bottom shell.
[0010] The differential integrated mounting structure as claimed in any one of the above, wherein preferably, a sealing glue layer is covered between the first sealing surface and the second sealing surface.
[0011] The differential integrated mounting structure as claimed in any one of the above, wherein preferably, the differential housing is integrally formed with the engine cylinder block.
[0012] In a second aspect, the utility model provides a vehicle comprising the differential integrated mounting structure.
[0013] The vehicle as claimed in any one of the above, wherein preferably, the vehicle further comprises a P3 motor, and wherein:
[0014] The driving motor gear shaft is connected with the output shaft of the P3 motor.
[0015] The one-way control valve is connected with the P3 motor in signal.
[0016] The vehicle as claimed in any one of the above, wherein preferably, the vehicle further comprises a differential bearing, an intermediate shaft bearing, a driving motor gear shaft bearing and a gear, and wherein the ends of the plurality of oil paths away from the main oil path correspond to the differential bearing, the intermediate shaft bearing, the driving motor gear shaft bearing and the gear respectively.
[0017] The vehicle as claimed in any one of the above, wherein preferably, the vehicle further comprises a range extender assembly, and wherein the mounting position of the differential is located in the middle of the range extender assembly.
[0018] Compared with the prior art, the differential housing is integrated on the engine cylinder block, which helps to realize the symmetrical layout of the left and right half shafts, reduces the torque deviation and the difficulty in designing the angle of the transmission shaft caused by the length difference of the half shafts, and improves the power transmission efficiency and the performance of the vehicle. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a partial explosion schematic view of the differential integrated mounting structure provided by the utility model embodiment;
[0020] Figure 2 is a lubricating oil path schematic view of the differential integrated mounting structure provided by the utility model embodiment.
[0021] BRIEF DESCRIPTION OF DRAWINGS
[0022] 10 - engine block
[0023] 20 - differential housing, 21 - accommodating cavity, 22 - differential, 23 - drive motor gear shaft, 24 - power transmission member, 241 - intermediate shaft, 242 - primary gear, 243 - secondary gear, 25 - main oil passage, 26 - branch oil passage, 27 - one-way control valve, 28 - bottom shell, 281 - first sealing surface, 29 - cover body, 291 - second sealing surface DETAILED DESCRIPTION
[0024] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explanation of the present application, and cannot be interpreted as a limitation of the present application.
[0025] In a first aspect, referring to Figure 1 The differential integrated mounting structure provided by the present application comprises an engine block 10 and a differential housing 20, the differential housing 20 is fixedly connected with the engine block 10, preferably, the differential housing 20 is integrally formed with the engine block 10 by casting, so that the traditional bolt, fastener or welding connection mode can be omitted, the structure is simplified and the weight is reduced, the Y direction is shortened by 40 mm+, the weight is reduced by more than 2 kg, the production efficiency can be improved and the cost can be reduced.
[0026] The differential housing 20 has an accommodating cavity 21, the differential 22, the drive motor gear shaft 23 and the power transmission member 24 are arranged in the accommodating cavity 21, the drive motor gear shaft 23 is connected with a P3 motor (not shown), the power transmission member 24 is connected to the differential 22 and the drive motor gear shaft 23 respectively, the power generated by the P3 motor is transmitted to the differential 22 in sequence through the drive motor gear shaft 23 and the power transmission member 24, and the differential 22 distributes the power to the drive wheels of the vehicle.
[0027] In the above embodiment, by integrating the differential housing 20 on the engine block 10, the differential 22 is assembled in the middle of the range extender assembly, which helps to realize the symmetrical layout of the left and right half shafts, can reduce the torque deviation caused by the length difference of the half shafts and the difficulty in designing the angle of the transmission shaft, and improve the power transmission efficiency and the performance of the whole vehicle.
[0028] In the embodiments provided by the present application, referring to Figure 2As shown, the differential housing 20 has a main oil path 25 and several branch oil paths 26, one end of each branch oil path 26 communicates with the main oil path 25, and the other end of each branch oil path 26 is matched with a friction pair to be lubricated. The main oil path 25 is provided with a one-way control valve 27, which is used to communicate the main oil path 25 and the branch oil path 26 after receiving a control signal.
[0029] The one-way control valve 27 can ensure that the oil only flows in one direction and cannot flow in the opposite direction, thereby controlling the communication state of the oil path. When the one-way control valve 27 is opened, the related friction pairs of the forced cooling lubricated differential 22 are forced to cool, and in the case of high load or high speed operation, the opening of the one-way control valve 27 can ensure that the related friction pairs of the differential 22 are fully lubricated and cooled to prevent overheating and wear. When the one-way control valve 27 is closed, the related friction pairs of the differential 22 rely on oil stirring to meet the lubrication, and the oil stirring refers to the rotation of the gear in the oil, which pushes the lubricating oil to flow, thereby achieving lubrication. This lubrication method has relatively low energy consumption, and at the same time, the oil is returned to the power generation system cavity, reducing the oil stirring loss and further reducing the energy consumption.
[0030] The control signal comes from the P3 motor, the P3 motor is connected with the drive motor gear shaft 23, and the one-way control valve 27 is signal connected with the P3 motor. When the P3 motor works, the one-way control valve 27 receives a control signal. The P3 motor is a type of motor in new energy vehicles, which is usually connected with the output shaft of the vehicle. The power generated by the P3 motor is transmitted to the differential 22 in turn through the drive motor gear shaft 23 and the power transmission member 24, and the differential 22 then distributes the power to the drive wheels of the vehicle. When the P3 motor works, it will send a control signal to the one-way control valve 27. This signal triggers the one-way control valve 27 to open, allowing the oil in the main oil path 25 to flow to the branch oil path 26, thereby cooling and lubricating the related friction pairs of the differential 22. When the P3 motor does not work, the one-way control valve 27 is closed, and the lubrication of the related friction pairs of the differential 22 mainly relies on oil stirring, which can reduce energy consumption and improve system efficiency.
[0031] In a feasible implementation, the friction pairs to be lubricated include differential bearings, intermediate shaft bearings, drive motor gear shaft bearings, and gears. In the oil path system of the differential housing 20, the ends of the branch oil paths 26 away from the main oil path 25 correspond to the differential bearings, intermediate shaft bearings, drive motor gear shaft bearings, and gears respectively, ensuring that the lubricating oil can reach these key parts and provide necessary lubrication and cooling. When the P3 motor works and sends a control signal to the one-way control valve 27, the one-way control valve 27 will open, allowing the oil in the main oil path 25 to flow to these parts, achieving forced cooling and lubrication to protect these key components and prolong their service life.
[0032] In an implementable embodiment, the power transmission member 24 comprises an intermediate shaft 241, a primary gear 242 and a secondary gear 243, the intermediate shaft 241 is the core component of the power transmission member 24, responsible for connecting and transmitting power, the intermediate shaft 241 is rotatably supported in the differential housing 20 through the intermediate shaft bearing, the primary gear 242 and the secondary gear 243 are sequentially sleeved on the intermediate shaft 241 along the axial direction of the intermediate shaft 241, and the primary gear 242 and the secondary gear 243 are sequentially sleeved along the intermediate shaft 241, so that a compact structure design can be realized and space can be saved. The primary gear 242 is in transmission connection with the driving motor gear shaft 23, the primary gear 242 is responsible for transmitting the power generated by the motor to the intermediate shaft 241, and the rotation of the primary gear 242 will drive the intermediate shaft 241 to rotate, and the secondary gear 243 is in transmission connection with the differential 22. Responsible for transmitting the power of the intermediate shaft 241 to the differential 22, so as to realize the distribution of power. By changing the number of teeth of the gear, the transmission ratio can be adjusted, so as to realize different output speeds and torques, and meet the needs of different working conditions.
[0033] In the embodiments provided by the utility model, referring to Figure 1 The differential housing 20 is of a split structure and comprises two main parts, namely, a bottom shell 28 and a cover body 29, the bottom shell 28 and the cover body 29 jointly form a containing cavity 21, a first sealing surface 281 is formed on the side edge of the bottom shell 28 facing the cover body 29, the first sealing surface 281 is used to form a seal with the corresponding surface of the cover body 29 when the cover body 29 is installed, so as to prevent oil leakage. A second sealing surface 291 is formed on the side edge of the cover body 29 facing the cover body 29, the second sealing surface 291 corresponds to the first sealing surface 281 of the bottom shell 28, and also serves to achieve a sealing effect.
[0034] When the cover body 29 is installed on the bottom shell 28, the first sealing surface 281 and the second sealing surface 291 are connected in abutment, forming a seal, so that the lubricating oil or other liquid in the differential housing 20 cannot leak, and at the same time, the dust and moisture from the outside cannot enter the containing cavity 21, protecting the internal mechanical components and ensuring the normal operation and maintenance of the differential 22, thereby prolonging the service life of the differential 22. Further, a sealing adhesive layer is covered between the first sealing surface 281 and the second sealing surface 291 to enhance the sealing effect. The sealing adhesive layer has good adhesion and will not fall off due to vibration during the operation of the differential 22, thereby affecting the sealing performance, and at the same time, has good oil resistance, temperature resistance and pressure resistance, and maintains the performance under the working conditions of the differential 22.
[0035] In a second aspect, the utility model provides a vehicle comprising the differential integrated mounting structure.
[0036] The above detailed the structure, features and effect of the present application according to the embodiments shown in the drawings, the above is only a preferred embodiment of the present application, but the present application is not limited by the drawings shown in the implementation range, any change or modification according to the concept of the present application, or the equivalent embodiment of equivalent change, still not beyond the spirit of the specification and drawings, should be within the scope of the present application.
Claims
1. A differential integrated mounting structure, characterized in that, include: Engine block; A differential housing is fixedly connected to the engine block. The differential housing has a receiving cavity, in which a differential, a drive motor gear shaft, and a power transmission component are disposed. The power transmission component is respectively connected to the differential and the drive motor gear shaft.
2. The differential integrated mounting structure according to claim 1, characterized in that, The differential housing has a main oil passage and several branch oil passages. One end of each branch oil passage is connected to the main oil passage, and the other end of each branch oil passage is used to engage with a friction pair to be lubricated. A one-way control valve is provided on the main oil passage. The one-way control valve is used to connect the main oil passage and the branch oil passages after receiving a control signal.
3. The differential integrated mounting structure according to claim 1, characterized in that, The power transmission component includes an intermediate shaft, a primary gear, and a secondary gear. The primary gear and the secondary gear are sequentially mounted on the intermediate shaft along its axial direction. The primary gear is connected to the drive motor gear shaft, and the secondary gear is connected to the differential.
4. The differential integrated mounting structure according to claim 1, characterized in that, The differential housing includes a bottom shell and a cover, which together form the receiving cavity. A first sealing surface is formed on the side edge of the bottom shell facing the cover, and a second sealing surface is formed on the side edge of the cover facing the cover. When the cover is installed on the bottom shell, the first sealing surface and the second sealing surface are in contact and connected.
5. The differential integrated mounting structure according to claim 4, characterized in that, A sealant layer is provided between the first sealing surface and the second sealing surface.
6. The differential integrated mounting structure according to claim 1, characterized in that, The differential housing is integrally formed with the engine block.
7. A vehicle, characterized in that, Includes the differential integrated mounting structure as described in any one of claims 1-6.
8. The vehicle according to claim 7, characterized in that, The vehicle also includes a P3 motor, wherein: The drive motor gear shaft is connected to the output shaft of the P3 motor; The one-way control valve is connected to the P3 motor signal.
9. The vehicle according to claim 7, characterized in that, The vehicle also includes a differential bearing, an intermediate shaft bearing, a drive motor gear shaft bearing, and gears, with the ends of several branch oil circuits furthest from the main oil circuit corresponding to the differential bearing, the intermediate shaft bearing, the drive motor gear shaft bearing, and the gears, respectively.
10. The vehicle according to claim 7, characterized in that, The vehicle also includes a range extender assembly, with the differential mounted in the middle of the range extender assembly.