CN106917846A - Dual mass flywheel - Google Patents

Abstract

The invention relates to a dual-mass flywheel, which includes an arc spring, and the dual-mass flywheel also includes an arc-shaped damping rod, and the vibration-damping rod is inserted into the arc-shaped spring. The damping rod inserted in the arc spring can absorb resonance energy and reduce the impact torque, thereby protecting the arc spring and avoiding the spring from being easily damaged.

Description

dual mass flywheel

technical field

The present invention relates to dual mass flywheels.

Background technique

In the prior art, the dual mass flywheel (DMF) is widely used to improve the NVH performance of the car, but at the same time, when the car works below the idle speed, there will be resonance impact torque, which will cause the transmission parts to be easily damaged. According to the model analysis, the DMF resonance frequency is around 11Hz. When the car is working below the idle speed, the resonance impact torque will be excited and applied to the arc spring of the dual-mass flywheel, making the arc spring prone to plastic deformation and damage.

Contents of the invention

The problem solved by the invention is the problem that the spring is easily damaged when the resonance impact torque is applied to the arc spring.

In order to solve the above problems, the present invention provides a dual-mass flywheel, which includes an arc-shaped spring, and the dual-mass flywheel also includes an arc-shaped damping rod inserted into the arc-shaped spring.

Specifically, the sliding end of the damping rod is correspondingly inserted into the sliding end of the arc spring, and the gap between the driving end of the damping rod and the driving end of the arc spring is useful when no torque is applied. In other words, there is enough corner margin for normal driving conditions.

The sliding end of the damping rod is closely fitted with the sliding end of the arc spring.

The diameter of the sliding end of the damping rod is slightly larger than the diameter of the driving end.

Under the limit torque, the rotation angle of the damping rod is slightly larger than the compression angle of the arc spring. In other words, the rotation angle of the damping rod is slightly larger than the maximum compression angle of the arc spring.

In a specific implementation, the arc spring is an arc coil spring.

Compared with the prior art, the technical solution of the present invention has the following advantages: the damping rod is inserted in the arc spring, which can absorb resonance energy and reduce the impact torque, thereby protecting the arc spring and preventing the spring from being easily damaged.

Description of drawings

Fig. 1 is a partial schematic diagram of a damping rod inserted in an arc spring in the present invention;

Fig. 2 is a partial schematic view of the dual-mass flywheel of the present invention.

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

A dual-mass flywheel includes an arc-shaped spring 1 and an arc-shaped damping rod 2, and the damping rod 2 is inserted into the arc-shaped spring 1, as shown in FIGS. 1 and 2 . The arc spring 1 is an arc-shaped coil spring. The sliding end of the damping rod 2 is correspondingly inserted into the sliding end of the arc spring 1, and the sliding end of the damping rod is closely matched with the sliding end of the arc spring, and the diameters of the arc spring and the sliding end of the damping rod are slightly larger than The diameter of the drive end so that the damper rod cannot move freely in it, preventing the dynamic balance of the DMF from being affected. The rotation angle of the damping rod 2 is slightly larger than the maximum compression angle of the arc spring 1, so that the compression and vibration absorption function of the arc spring will not be affected. Between the driving end of the damping rod 2 and the driving end of the arc spring 1 there is enough corner margin for normal driving conditions. The cross-section of the damping rod 2 can be in any shape, as long as it can be filled in the arc spring to achieve the required strength and durability. The damping rod 2 is inserted in the arc spring 1, which can absorb resonance energy and reduce the impact torque, thereby protecting the arc spring and preventing the spring from being easily damaged. In this way, there is no need to change the arc spring, the normal function of the DMF is guaranteed, and the cost is also reduced. Through the selection of the material of the damping rod, the damping rod has better durability and mechanical properties. Setting the damping rod can also reduce the dependence on the ECU supplier's oil cut-off strategy and protect the DMF. Further, the DMF with the damping rod can improve the starting performance of the car.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (6)

1. A dual-mass flywheel comprising an arc spring, characterized in that the dual-mass flywheel further comprises an arc-shaped damping rod inserted into the arc-shaped spring. 2. The dual-mass flywheel according to claim 1, wherein the sliding end of the damping rod is correspondingly inserted into the sliding end of the arc spring, and the driving end of the damping rod is in contact with the arc spring. There is a distance between the drive ends of the curved springs for the compressed movement of the curved springs when no torque is applied. 3. The dual-mass flywheel according to claim 2, wherein the sliding end of the damping rod is closely matched with the sliding end of the arc spring. 4. The dual mass flywheel according to claim 1, 2 or 3, wherein the diameter of the sliding end of the damping rod is slightly larger than the diameter of the driving end. 5. The dual-mass flywheel according to claim 1, 2 or 3, characterized in that the rotation angle of the damping rod is slightly larger than the compression angle of the arc spring under the limit torque. 6. The dual mass flywheel according to claim 1, 2 or 3, wherein the arc spring is an arc coil spring.