CN219139721U

CN219139721U - Engine flywheel device, engine and vehicle

Info

Publication number: CN219139721U
Application number: CN202223417279.2U
Authority: CN
Inventors: 王新立; 罗力成; 黄远平
Original assignee: Ningbo Shenglong New Energy Vehicle Power Co ltd
Current assignee: Ningbo Shenglong New Energy Vehicle Power Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-06-06
Anticipated expiration: 2032-12-20

Abstract

The utility model provides an engine flywheel device, which comprises a single-mass flywheel connected with an engine crankshaft and an output shaft for outputting the rotation of the single-mass flywheel, wherein the single-mass flywheel is integrally provided with a speed-increasing transmission assembly, and the speed-increasing transmission assembly is in transmission connection with the output shaft through the speed-increasing transmission assembly and comprises a planetary gear mechanism. The single mass flywheel and the speed-increasing transmission assembly are integrally installed, output speed increasing is realized through the principle of planetary gear transmission, the axial distance of the whole structure is shortened through the integrated installation, the planetary gear mechanism ensures stable transmission, meanwhile, the output end and the crankshaft of the engine can be kept coaxial, the mass distribution of the high-speed engine along the axis of the crankshaft is facilitated, the stress characteristic of the whole structure during whole vehicle arrangement is facilitated, the problem of reduced assembly of the whole vehicle due to an additional speed-changing structure is avoided, and the integrated design is simple in whole structure and convenient to maintain and high in reliability; an engine and a vehicle are also provided.

Description

Engine flywheel device, engine and vehicle

Technical Field

The utility model relates to the field of vehicle engines, in particular to an engine flywheel device, an engine and a vehicle.

Background

The existing single mass flywheel design of the range-extending engine mainly adopts the flywheel structure of the traditional internal combustion engine, a starting gear ring is removed on the basis of the flywheel structure of the traditional internal combustion engine, and the engine is started by the reverse dragging of a motor during the starting process. The single-mass flywheel of the engine is directly fixed on an output flange at the rear end of the crankshaft and is mechanically and directly connected with the crankshaft, so that the single-mass flywheel and the crankshaft rotate at the same speed, the output speed is easily limited to the mechanical characteristics of the internal combustion engine, the output working speed of the engine is not necessarily very high, and the engine is usually operated at a stage below thousands of revolutions per minute; if the output rotation speed is increased continuously, the rotation speed of the crankshaft must be increased, and the excessive rotation speed of the crankshaft inevitably causes continuous deterioration of the engine operation.

The main expression is as follows: the dynamic performance is reduced along with the continuous rising of the rotating speed, the fatigue degree of each part in the engine is increased, the durability is reduced, noise, tail gas pollution and the like are seriously exceeded, and the combustion economy of the working of the internal combustion engine is reduced. Therefore, the rotation speed between normal working curves of the engine is limited in a relatively low rotation speed range, and the output rotation speed of the flywheel end which is designed conventionally is low, so that the rotation speed of the extended-range generator is low, and the motor speed can not be increased. If the output is high-speed, the structures such as a speed change gear set, a gearbox and the like are required to be additionally arranged, in addition, the design of the engine is complicated, the problems of axial and circumferential layout, transmission loss and the like of an output end are required to be considered, and the assembling and arranging performances of the frame are also reduced.

In summary, the existing single-mass flywheel design of the extended-range engine has the problem that the single-mass flywheel design is difficult to adapt to high-speed output.

Disclosure of Invention

The utility model aims to solve the technical problem that the single mass flywheel design of the extended-range engine is difficult to adapt to high-rotation-speed output.

In order to solve the problems, the utility model provides an engine flywheel device, which comprises a single-mass flywheel connected with an engine crankshaft and an output shaft for outputting the rotation of the single-mass flywheel, wherein the single-mass flywheel is integrally provided with a speed increasing transmission assembly, and the speed increasing transmission assembly is in transmission connection with the output shaft through the speed increasing transmission assembly and comprises a planetary gear mechanism.

As a preferable scheme, an annular gear is arranged on the output side of the single-mass flywheel, the annular gear and the single-mass flywheel are integrally formed, and the annular gear is in transmission connection with the planetary gear mechanism.

As the preferable scheme, the planetary gear mechanism comprises a planetary gear set and a sun gear which are matched with each other, the planetary gear set comprises a wheel carrier and more than three planetary gears which are circumferentially and symmetrically distributed, each planetary gear is meshed with the inner gear ring, each planetary gear is meshed with the sun gear, and the sun gear is circumferentially positioned and connected with the output shaft.

As the preferable scheme, the rotation center of the wheel frame is rotatably connected with the output side of the single-mass flywheel, a connecting shaft is arranged on the wheel frame, and the planet wheel is rotatably arranged on the connecting shaft.

As a preferable scheme, one end of the sun wheel is coaxially and rotatably connected with the output side of the single-mass flywheel, and the wheel carrier is rotatably sleeved on the periphery of the sun wheel.

As a preferable scheme, a check ring is sleeved on the periphery of the sun wheel, and the sun wheel and the single mass flywheel are axially positioned through the check ring.

Preferably, the sun wheel has an axial projection structure on its outer periphery, through which the wheel carrier is axially fixed.

As a preferable scheme, one end of the sun wheel, which is connected with the output shaft, is provided with a spline structure, and the sun wheel is fixedly connected with the output shaft in the circumferential direction through the spline structure.

The engine flywheel device provided by the utility model comprises a single-mass flywheel connected with an engine crankshaft and an output shaft for outputting the rotation of the single-mass flywheel, wherein the single-mass flywheel is integrally provided with a speed-increasing transmission assembly, and the speed-increasing transmission assembly is in transmission connection with the output shaft through the speed-increasing transmission assembly and comprises a planetary gear mechanism. The simple substance flywheel is integrally installed with the speed-increasing transmission assembly, output speed increasing is achieved through the principle of planetary gear transmission, the integral installation shortens the axial distance of the whole structure, the planetary gear mechanism ensures stable transmission, meanwhile, the output end and a crankshaft of an engine can be kept coaxial, mass distribution of the high-speed engine along the axis of the crankshaft is facilitated, stress characteristics of the whole structure during whole vehicle arrangement are facilitated, the problem of reduced assembly of the whole vehicle due to an additional speed-changing structure is avoided, the engine with a traditional speed-changing design is avoided through the design, the integral structure is simple, maintenance is convenient, reliability is high, in addition, the power density of a driving motor is improved, the power factor is increased, the system efficiency is improved, and in addition, the connected motor is good in high-speed performance, high in precision, good in transient characteristics, small in rotational inertia, high in response speed and the like. Therefore, the technical scheme provided by the utility model can effectively solve the problem that the single mass flywheel design of the extended-range engine is difficult to adapt to high-speed output.

The utility model also provides an engine adopting the engine flywheel device and a vehicle adopting the engine.

Drawings

FIG. 1 is an exploded assembly view of an engine flywheel assembly according to the present utility model;

FIG. 2 is a front view of an engine flywheel assembly according to the present utility model;

FIG. 3 is a side partial cross-sectional view of an engine flywheel device provided by the present utility model;

1. a single mass flywheel; 2. an inner gear ring; 3. a rolling bearing; 4. a retainer ring; 5. a wheel carrier; 6. a connecting shaft; 7. needle roller bearings; 8. a planet wheel; 9. a sun wheel; 10. a spline structure; 11. an output shaft.

Detailed Description

The following description of the present utility model will be made clearly and fully, and it is apparent that the embodiments described are some, but not all, of the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, 2 and 3, fig. 1 is an exploded assembly view of an engine flywheel device, fig. 2 is a front view of the engine flywheel device, and fig. 3 is a side partial sectional view of the engine flywheel device.

The engine flywheel device of the embodiment comprises a single-mass flywheel 1 connected with an engine crankshaft and an output shaft 11 for outputting rotation of the single-mass flywheel 1, wherein the single-mass flywheel 1 is integrally provided with a speed-increasing transmission assembly, and the speed-increasing transmission assembly is in transmission connection with the output shaft 11 through the speed-increasing transmission assembly and comprises a planetary gear mechanism.

The simple substance flywheel is integrally installed with the speed-increasing transmission assembly, output speed increasing is achieved through the principle of planetary gear transmission, the integral installation shortens the axial distance of the whole structure, the planetary gear mechanism ensures stable transmission, meanwhile, the output end and a crankshaft of an engine can be kept coaxial, mass distribution of the high-speed engine along the axis of the crankshaft is facilitated, stress characteristics of the whole structure during whole vehicle arrangement are facilitated, the problem of reduced assembly of the whole vehicle due to an additional speed-changing structure is avoided, the engine with a traditional speed-changing design is avoided through the design, the integral structure is simple, maintenance is convenient, reliability is high, in addition, the power density of a driving motor is improved, the power factor is increased, the system efficiency is improved, and in addition, the connected motor is good in high-speed performance, high in precision, good in transient characteristics, small in rotational inertia, high in response speed and the like.

On the basis of the embodiment, the output side of the single-mass flywheel 1 is further provided with an annular gear 2, and the annular gear 2 and the single-mass flywheel 1 are integrally formed and are in transmission connection with the planetary gear mechanism through the annular gear 2. The technical scheme that this embodiment provided further optimizes the transmission design, and simple substance flywheel and ring gear are a structure entity, and transmission structure overall structure is simple in addition and is convenient for install and maintain, and mechanical properties is also better for split installation simultaneously, and the design of ring gear cooperation planet wheel has effectively promoted output rotational speed, also is a stable output structure of transmission simultaneously.

In this embodiment, the planetary gear mechanism includes a planetary gear set and a sun gear that cooperate with each other, the planetary gear set includes a carrier 5 and more than three planetary gears 9 that are circumferentially symmetrically distributed, each planetary gear 9 is engaged and connected with the ring gear 2, each planetary gear 9 is engaged and connected with the sun gear, and the sun gear is circumferentially positioned and connected with the output shaft 11. The structure of the planetary gear set mechanism is specifically optimized in the scheme, the planetary gear set mechanism comprises more than three planetary gears 9 which are symmetrically distributed, the three planetary gears which are distributed circumferentially by 120 degrees are adopted in the drawing, the number of the planetary gears can be increased as long as the circumferential symmetric distribution of the planetary gears is guaranteed, the outer edge profile formed by the teeth of each planetary gear 9 is meshed with the inner gear ring, the inner edge profile is meshed with the teeth of the sun gear, the planetary gear set mechanism is simple in design structure, high in transmission stability and capable of relatively reducing the power loss caused by friction without using more planetary gears. In addition, the tooth structures of the sun wheel and the planet wheel preferably adopt helical teeth, so that the transmission is more stable, and the practical service life of the stress pinion can be longer.

In the technical scheme provided by the embodiment, the rotation center of a wheel frame 5 is rotatably connected with the output side of a single-mass flywheel 1, a connecting shaft 6 is arranged on the wheel frame 5, and a planet wheel 9 is rotatably arranged on the connecting shaft 6; one end of the sun wheel is coaxially and rotatably connected with the output side of the single-mass flywheel 1, and the wheel frame 5 is rotatably sleeved on the periphery of the sun wheel.

The rotatable connection of the wheel frame 5 and the single mass flywheel is realized by arranging an installation hole with an adaptive size in the rotation center of the output side of the single mass flywheel, arranging a rolling bearing 3 in the installation hole and inserting the end part of the sun wheel into the installation hole through the rolling bearing 3; in addition, the connecting shaft on the wheel carrier is preferably in rotary connection with the planet wheel 9 by adopting a bearing structure, and the wheel carrier 5 is directly sleeved on the sun wheel, so that the structure is simple and easy to operate, the assembly cost is reduced, more importantly, the coaxial structure is ensured, and the technical requirements of specific rotatability but high-speed unimpeded rotation of the planet wheel and the sun wheel are met. The preferred solution of the bearing is to use a ball bearing between the single mass flywheel 1 and the sun wheel end, and a needle bearing 7 between the planet wheel 9 and the connecting shaft 6 of the wheel carrier 5.

On the basis of the embodiment, the outer periphery of the sun wheel is sleeved with the retainer ring 4, and the retainer ring 4 and the single mass flywheel 1 are axially positioned. The further sun wheel has an axial structure at its periphery, by means of which the wheel carrier 5 is axially fixed. The design of the axon and the retainer ring has the technical ideas that the axial positioning among all mechanisms is realized, the displacement is prevented from falling off, the retainer ring 4 is specifically arranged at the corresponding position of the periphery of the sun wheel, the wheel carrier 5 is sleeved between the retainer ring 4 and the axon structure, the design of each structure ensures the stable axial position among the sun wheel, the planetary wheel set and the single mass flywheel, the integral structural stability of the device is improved, the assembly structure is simple and easy, and the assembly cost is lower.

Further specifically optimizing the connection structure of the output side of the sun wheel, one end of the sun wheel, which is connected with the output shaft 11, is provided with a spline structure 10, and the sun wheel is fixedly connected with the output shaft 11 in the circumferential direction through the spline structure 10. The preferred design is that sun wheel one end periphery sets up the external splines, and output shaft 11 one end cavity sets up the internal splines, and the two passes through spline fit connection, can effectively realize rotatory transmission, and the connection structure of spline has good mechanical bearing capacity, can adapt to big moment of torsion output.

On the basis, the engine adopting the engine flywheel device in the above embodiments is also provided, and the engine also has the beneficial effects of the flywheel device due to the adoption of the engine flywheel device. A vehicle comprising such an engine is further provided on this basis, whereby the vehicle has the beneficial effects of the engine.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims

1. The engine flywheel device is characterized by comprising a single-mass flywheel (1) connected with an engine crankshaft and an output shaft (11) for outputting rotation of the single-mass flywheel (1), wherein the single-mass flywheel (1) is integrally provided with a speed-increasing transmission assembly, the speed-increasing transmission assembly is in transmission connection with the output shaft (11) through the speed-increasing transmission assembly, and the speed-increasing transmission assembly comprises a planetary gear mechanism.

2. The engine flywheel device according to claim 1, characterized in that an inner gear ring (2) is arranged on the output side of the single mass flywheel (1), the inner gear ring (2) and the single mass flywheel (1) are integrally formed, and the inner gear ring (2) is in transmission connection with the planetary gear mechanism.

3. Engine flywheel device according to claim 2, characterized in that the planetary gear mechanism comprises a planetary wheel set and a sun wheel (9) which are mutually matched, the planetary wheel set comprises a wheel carrier (5) and more than three planetary wheels (8) which are circumferentially and symmetrically distributed, each planetary wheel (8) is in meshed connection with the inner gear ring (2), each planetary wheel (8) is in meshed connection with the sun wheel (9), and the sun wheel (9) is in circumferentially positioned connection with the output shaft (11).

4. An engine flywheel device according to claim 3, characterized in that the centre of rotation of the wheel carrier (5) is rotatably connected with the output side of the single mass flywheel (1), a connecting shaft (6) is provided on the wheel carrier (5), and the planet wheel (8) is rotatably mounted on the connecting shaft (6).

5. The engine flywheel device according to claim 4, characterized in that one end of the sun wheel (9) is rotatably connected coaxially with the output side of the single mass flywheel (1), and the wheel carrier (5) is rotatably sleeved on the outer periphery of the sun wheel (9).

6. Engine flywheel device according to claim 5, characterized in that the sun wheel (9) is peripherally fitted with a collar (4), positioned axially between the collar (4) and the single mass flywheel (1).

7. Engine flywheel device according to claim 6, characterized in that the sun wheel (9) has an axial structure at its periphery, by means of which the wheel carrier (5) is axially fixed.

8. Engine flywheel device according to claim 7, characterized in that the end of the sun wheel (9) connected to the output shaft (11) is provided with a spline structure (10), by means of which spline structure (10) it is fixedly connected circumferentially to the output shaft (11).

9. An engine comprising an engine flywheel device as claimed in any one of claims 1 to 8.

10. A vehicle comprising the engine of claim 9.