CN217271752U

CN217271752U - Gear assembly, transmission system and vehicle

Info

Publication number: CN217271752U
Application number: CN202122905348.3U
Authority: CN
Inventors: 王贵民; 张洋洋; 侯斌; 王贵琛
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-08-23
Anticipated expiration: 2031-11-25

Abstract

The utility model relates to a gear shock attenuation technical field discloses a gear assembly, transmission system and vehicle, and the gear assembly includes: gear and bumper shock absorber, the gear middle part is equipped with first pilot hole, the bumper shock absorber assemble in the first pilot hole, just the bumper shock absorber has the second pilot hole. After the gear shaft is assembled in the first assembling hole, the shock absorber can absorb the vibration energy of the gear and reduce the transmission of the vibration energy to the gear shaft, thereby reducing or even eliminating the rotating speed shake during power transmission between devices at two sides of the gear. A similar effect is also obtained when the gear shaft side transmits power to the gear side.

Description

Gear assembly, transmission system and vehicle

Technical Field

The utility model relates to a gear shock attenuation technical field, in particular to gear assembly, transmission system and vehicle.

Background

The design indexes of modern high-speed large-cylinder-diameter engines are gradually strengthened, the average effective pressure and the design explosion pressure are continuously improved, the torsional vibration of a crankshaft and the load of a gear train are continuously improved, and meanwhile, due to the lightweight design requirement, the crankshaft cannot be designed to be strong enough to reduce the torsional vibration on the premise of meeting the strength requirement. The fluctuation of the rotating speed in the running process of the gear train is severe under the action of high torsional vibration, when the fluctuation is transmitted to accessories such as a water pump, high-frequency relative motion of a water seal and a pump shaft can be caused, and the water seal is damaged in a short time to cause water leakage, so that the problem that the reliability of a high-speed large-cylinder-diameter engine is very troublesome at present is solved. Torsional vibration refers to the phenomenon that in the running process of an engine crankshaft, because a shaft with infinite rigidity is not, under the influence of an ignition sequence, a shaft body is subjected to torsional deformation under the action of gas force, inertia force and the like and changes along with the change of the rotating speed, the load and the like of the engine. The rotation speed fluctuation refers to the phenomenon that the rotation speed of the gear changes periodically under the condition that the rotation speed of the whole machine is constant, wherein the rotation speed of the engine gear train is driven by the rotation of the crankshaft and is influenced by the torsional vibration of the crankshaft.

At present, an effective solution is not available, and partial products are changed into belt transmission instead of gear transmission to moderate the fluctuation of the rotating speed transmitted to a water pump, but on one hand, the gear train of the whole machine is changed violently, and meanwhile, a protective cover shell of a rotating part is required to be added, on the other hand, the transmission reliability is reduced and wearing parts are added; some traditional vibration reduction schemes such as shearing gears and rubber gears cannot be effectively solved through verification on the whole machine.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a gear assembly, transmission system and vehicle for it is undulant to reduce the rotational speed among the power transmission process.

In order to achieve the above purpose, the utility model provides a following technical scheme:

in a first aspect, there is provided a gear assembly comprising: gear and bumper shock absorber, the gear middle part is equipped with first pilot hole, the bumper shock absorber assemble in the first pilot hole, just the bumper shock absorber has the second pilot hole. After the gear shaft is assembled in the first assembling hole, the shock absorber can absorb the vibration energy of the gear and reduce the transmission of the vibration energy to the gear shaft, so that the rotating speed shake during the power transmission between the devices at two sides of the gear is reduced or even eliminated. A similar effect is also obtained when the gear shaft side transmits power to the gear side.

Optionally, the shock absorber is in interference fit with an inner wall of the first assembly hole.

Optionally, the shock absorber is a leaf spring shock absorber.

In a second aspect, a transmission system is provided, which includes a gear shaft and the gear assembly of any one of the above technical solutions, wherein the gear shaft is assembled in the second assembling hole and is coaxial with the gear.

The transmission system has the same advantages as the gear assembly described above with respect to the prior art, and will not be described herein again.

Optionally, be equipped with the lubrication oil duct in the gear shaft to and, with a plurality of lubrication oil holes of lubrication oil duct intercommunication, every the lubrication oil hole will the lubrication oil duct with the periphery intercommunication of gear shaft, and the opening of every lubrication oil hole all with the inner wall cooperation of second pilot hole.

Optionally, an inlet of the lubricating oil passage communicates with the oil reservoir.

Optionally, the transmission system further comprises a gear chamber, the gear assembly is located in the gear chamber, and an inner wall of the second assembling hole of the shock absorber is fixed with the gear chamber.

In a third aspect, a vehicle is provided, which includes an engine, a functional device and the transmission system of any one of the above technical solutions, wherein an input end of the transmission system is in transmission connection with a crankshaft of the engine, and an output end of the transmission system is in transmission connection with the functional device.

Optionally, the functional device is a water pump.

Optionally, an inner wall of the second assembly hole of the damper is fixed with the body of the engine.

The vehicle has the same advantages of the transmission system compared with the prior art, and the detailed description is omitted.

Drawings

FIG. 1 is a perspective view of a gear assembly provided by an embodiment of the present application when mated with a gear shaft;

FIG. 2 is a cross-sectional view of the gear assembly and gear shaft of FIG. 1 at an axis;

FIG. 3 is a schematic view of a cross-section perpendicular to the axis of the gear shaft of FIG. 1;

fig. 4 is a simulation diagram of the damping effect of the gear assembly shown in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, a gear assembly provided by the embodiment of the present application includes: gear 1 and bumper shock absorber 2, gear middle part is equipped with first pilot hole 11, and bumper shock absorber 2 assembles in first pilot hole 11, and bumper shock absorber 2 has second pilot hole 21. After the gear shaft 3 is assembled into the first assembling hole 11, the shock absorber 2 can absorb the shock energy of the gear 1, reduce the transmission of the shock energy to the gear shaft 3, and reduce or even eliminate the rotation speed fluctuation during the power transmission between the devices on both sides of the gear 1. A similar effect is also obtained when the gear shaft 3 side transmits power to the gear 1 side. Referring to fig. 4, the abscissa is torsional rigidity, the ordinate is ring inertia, the circle point is large to indicate large rotation speed fluctuation, the circle point is small to indicate small rotation speed fluctuation, and the right-side diagram is an enlarged view of the square frame in the left-side diagram.

In a specific embodiment, the damper 2 is interference-fitted with the inner wall of the first fitting hole 11 to prevent misalignment of the two.

In a specific embodiment, the damper 2 is a plate spring damper, which has a good damping effect in the radial direction and can use the oil of the transmission system as a lubricant.

Based on the same utility model conception, this application embodiment provides a transmission system, and transmission system includes gear shaft 3 and the gear assembly that above-mentioned embodiment provided, and wherein, gear shaft 3 assembles in second pilot hole 21, and coaxial with gear 1.

The vibration absorber 2 can absorb the vibration energy of the gear 1 and reduce the transmission of the vibration energy to the gear shaft 3, thereby reducing or even eliminating the rotation speed fluctuation during the power transmission between the devices at the two sides of the gear 1. A similar effect is also obtained when the gear shaft 3 side transmits power to the gear 1 side.

In a specific embodiment, a lubricating oil passage 31 is provided in the gear shaft 3, and a plurality of lubricating oil holes 32 are provided in communication with the lubricating oil passage 31, each lubricating oil hole 32 communicating the lubricating oil passage 31 with the circumferential surface of the gear shaft 3, and an opening of each lubricating oil hole 32 is fitted to an inner wall of the second fitting hole 21, and a lubricating oil (e.g., oil) is delivered and dispersed to each lubricating oil hole 32 through the lubricating oil passage 31 to lubricate the interface between the gear shaft 3 and the gear shaft 3.

In a specific embodiment, the inlet of the oil passage 31 communicates with the oil reservoir to facilitate direct use of the oil of the system for lubrication without additional provision of another oil reservoir.

In a particular embodiment, the transmission system further comprises a gear chamber, the gear assembly being located in the gear chamber and the inner wall of the second fitting hole 21 of the damper 2 being fixed with the gear chamber, so that the striking is confined only to the gear 1 and the pulsation is absorbed at the damper 2, the gear shaft 3 not being vibrated.

Based on the same utility model conception, this application embodiment provides a vehicle, and vehicle includes the transmission system of engine, functional device and above-mentioned embodiment, and transmission system's input is connected with the crankshaft drive of engine, and the output is connected with the functional device transmission.

In a specific embodiment, the functional device is a water pump, so that the rotating speed fluctuation of an engine and the water pump is reduced or even eliminated, and the water leakage caused by the high-frequency relative motion of a water seal and a pump shaft when the water seal is transmitted to accessories such as the water pump and the like and further the damage of the water seal in a short time is prevented.

In a specific embodiment, the inner wall of the second fitting hole 21 of the damper 2 is fixed to the body of the engine so as to limit the striking only to the gear 1 and absorb the pulsation at the damper 2 without the gear shaft 3 vibrating.

It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A gear assembly, comprising: the middle part of the gear is provided with a first assembling hole, the shock absorber is assembled in the first assembling hole, and the shock absorber is provided with a second assembling hole;

the shock absorber is a plate spring shock absorber.

2. The gear assembly according to claim 1, wherein said shock absorber is an interference fit with an inner wall of said first assembly aperture.

3. A transmission system comprising a gear shaft and the gear assembly of claim 1 or 2, wherein the gear shaft is fitted in the second fitting hole and is coaxial with the gear.

4. The transmission system as claimed in claim 3, wherein a lubricating oil passage is provided in the gear shaft, and a plurality of lubricating oil holes are communicated with the lubricating oil passage, each of the lubricating oil holes communicating the lubricating oil passage with a circumferential surface of the gear shaft, and an opening of each of the lubricating oil holes is fitted with an inner wall of the second fitting hole.

5. The transmission system according to claim 4, wherein an inlet of the lubricating oil passage communicates with an oil reservoir.

6. The transmission system according to claim 3, further comprising a gear chamber, wherein the gear assembly is located in the gear chamber, and wherein an inner wall of the second fitting hole of the shock absorber is fixed with the gear chamber.

7. A vehicle comprising an engine, a functional device and a transmission system as claimed in any one of claims 3 to 6, the transmission system having an input drivingly connected to the crankshaft of the engine and an output drivingly connected to the functional device.

8. The vehicle of claim 7, wherein the functional device is a water pump.

9. The vehicle of claim 8, wherein an inner wall of the second fitting hole of the damper is fixed to a body of an engine.