KR101216861B1 - Propeller shaft center bearing having vibration decrease function - Google Patents

Abstract

The present invention relates to a propeller shaft center bearing having a vibration damping function, wherein the propeller shaft is mounted in a center bearing of a propeller shaft which is installed in a longitudinal direction between a transmission and a driving wheel to transmit a driving force in which the shift is completed to the driving wheel. The vehicle body of the vehicle is provided with a center bearing having a vibration damping function so as to change the damping value of the vibration transmitted from the shaft to achieve an effective vibration attenuation, wherein a plurality of forming cells are formed on the center bearing and the grid of the shape memory alloy The mold member is embedded, and characterized in that it comprises a control member for supplying a current to the lattice member and adjusts its strength.
According to the present invention, by incorporating a lattice member into the propeller shaft center bearing constituting the drive shaft of the vehicle, there is an effect that the effective vibration attenuation can be made by changing the damping value in the vibration transmitted to the center bearing according to the environment.

Description

Propeller shaft center bearing having vibration decrease function}

The present invention relates to a vibration damping device for a propeller shaft center bearing, and more particularly, a vibration damping device is mounted on a propeller shaft center bearing constituting a drive shaft of a vehicle, thereby damping a damping value in vibration transmitted to a center bearing according to an environment. The present invention relates to a vibration damping device for a propeller shaft center bearing that can be changed to enable effective vibration damping, while increasing rigidity to secure reliability.

Recently, automobile technology has been developed to reduce comfort and noise and vibration.

In this technological change, vibration of propeller shafts has been pointed out as a cause of deterioration of ride comfort, vibration and noise generation. That is, as the length of the vehicle propulsion shaft is lengthened, there is a problem in that bending vibration and noise are added.

To this end, the propeller shaft is divided into two front and rear, and the middle part is connected, and the center part is mounted on the middle part to damp the bending vibration of the propeller shaft.

In addition, the center bearing uses a method using a rubber damper or hydraulic pressure to damp the bending vibration.

However, when the rubber damper is used for the center bearing, there is a problem that it is not active and cannot be applied to various vibration modes. In particular, there is a problem that the vibration is even greater due to the change in the resonance frequency according to the age of the vehicle.

In addition, when the hydraulic pressure is used for the center bearing, it can actively cope with the vibration compared to the rubber, but there are problems due to resistance due to the fluid, leakage of the fluid, and the like.

In recent years, various studies have been conducted to solve these problems, but no clear alternatives have been made.

The present invention has been made to solve the above problems, the vibration damping device is mounted on the propeller shaft center bearing constituting the drive shaft of the vehicle to change the damping value in the vibration transmitted to the center bearing according to the environment effective vibration While the attenuation is made, the purpose is to ensure the reliability by increasing its own strength.

In addition, its purpose is to enable simple operation while simply configuring the vibration damping device mounted on the center bearing.

In order to achieve the above object, in the center bearing of the propeller shaft which is installed in the longitudinal direction between the transmission and the drive wheel to transmit the drive force is completed to the drive wheel, the vehicle body of the vehicle on which the propeller shaft is mounted from the shaft A center bearing having a vibration damping function is provided to change the damping value of the transmitted vibration to achieve an effective vibration damping. A lattice member of a shape memory alloy material in which a plurality of forming cells are formed in the center bearing is embedded. It characterized in that it comprises a control member for supplying a current to the grid-like member and adjust its strength.

According to the present invention, the vibration damping device is mounted on the propeller shaft center bearing constituting the drive shaft of the vehicle, thereby changing the damping value in the vibration transmitted to the center bearing according to the environment, thereby effectively reducing the vibration.

In addition, while simply configuring the vibration damping device mounted on the center bearing there is an effect that can be operated simply.

1 is a front view showing an embodiment of a propeller shaft center bearing having a vibration damping function according to the present invention.
Figure 2 is a block diagram showing the configuration of a propeller shaft center bearing having a vibration damping function according to the present invention.
3 (a) and 3 (b) is a cross-sectional view showing a propeller shaft center bearing according to the present invention.
Figure 4 is a block diagram showing another embodiment of the propeller shaft center bearing according to the present invention.

Hereinafter, looking at the configuration of the vibration damping device for a propeller shaft center bearing of the present invention in detail.

First, the propeller shaft center bearing 50 of the present invention is installed in the longitudinal direction between the transmission and the driving wheel is fixed to the vehicle body 10 of the vehicle while being mounted on the propeller shaft 20 for transmitting the driving force is completed to the driving wheel Combined.

Here, the propeller shaft 20 and the center bearing 50 are similar to the existing configuration, so a separate description thereof will be omitted.

And the center bearing 50 of the propeller shaft is installed in the longitudinal direction between the transmission and the drive wheel of the present invention to transmit the drive force is completed to the drive wheel, the vehicle body of the vehicle is equipped with the propeller shaft of the vibration transmitted from the shaft A center bearing having a vibration damping function so that an effective vibration attenuation is made by changing a damping value, wherein a lattice member 55 of a shape memory alloy material in which a plurality of molding cells are formed and arranged in the center bearing is embedded, and the lattice member It includes a control member for supplying a current to the current and adjust its strength.

Here, the center bearing 50 reveals that the protective cover 80 is formed of a synthetic resin or rubber material at intervals.

The lattice member 50, in which a plurality of molding cells are formed in the center bearing 30, is formed by processing a material in which shape change occurs due to current application.

That is, the present invention increases the shape shifting effect of the transverse direction and the longitudinal direction by using the lattice member 55, so that the present invention is directly applied to the direction in which vibration damping is required (especially the longitudinal vibration which is greatly affected by the deflection of the shaft). It can be used in various machines that need to control the axis vibration.

Here, in the center bearing 50, a plurality of integrally formed cells, which are polygonal space portions, are formed by cross-aligning the first strip 55a and the second strip 55b each having a continuous pattern of cross sections. The grid-like member 55 is provided is embedded.

And the incorporation of the shape memory alloy material into the center bearing 30 with the lattice member 55 is to minimize the vibration transmitted to the center bearing 30 during the transmission of the bending vibration to the propeller shaft 20 at a minimum time. This is to balance it.

That is, the lattice member 50 positioned inside the center bearing 30 supports the center bearing 50 with the same magnetic field, thereby minimizing vibration. This is a structure that can significantly improve the bond strength, thereby increasing the structural rigidity against vibration and temperature environmental conditions, as well as providing a useful effect that can improve the reliability of the product.

The shape memory alloy is composed of a commonly used nickel-titanium alloy or copper-zinc-aluminum alloy, and has a characteristic of rapidly shrinking to 85-150 ° C. and restoring to its original shape at room temperature. More than about 7000 times.

The lattice member 50 made of the shape memory alloy may be applied to generate a tightening phenomenon that is tightly fitted to the center bearing while being heated and contracted from a current or a heater source during post-form adjustment work.

The power supply source mounted inside or outside the center bearing 50 is configured to receive electric power from the adjusting member 70 for adjusting the power supply and the magnetic field strength to supply the current to the lattice member 50.

At this time, the adjustment member 70 is made differently depending on the specifications, such as the use and size of the vehicle is formed so that the user can directly operate.

An embodiment of the center bearing 50 configured as described above is as follows.

First, in forming the center bearing 50 from the shape memory alloy material having a shape change property by electric current, the center bearing 30 is integrally formed by incorporating a lattice member into the center bearing 30.

In this case, the center bearing 50 is fixed to the vehicle body 10 of the vehicle and serves as a damper while supporting the propeller shaft 20 so as not to be struck.

And after mounting a power supply source for supplying current to the inside or outside of the center bearing 50 is connected to the control member 70 for adjusting the power supply and the strength of the magnetic field of the center bearing having a vibration damping function Implementation is done.

When bending vibration is transmitted to the propeller shaft 20 according to the progress of the vehicle in the above situation, the adjusting member 70 adjusts the strength of the current according to the situation and then transmits the vibration transmitted to the center bearing 30. Will be reduced.

That is, when the propeller shaft 20 vibrates up and down by bending vibration, the adjusting member 70 actively flows a current to the lattice member 50 in the center bearing 50 to change the magnetic field to form a lattice shape. The member 50 is to effectively reduce the vibration by adjusting the stiffness change of the center bearing (30). In addition, by providing a plurality of polygonal forming cells to increase the rigidity, it is possible to create an additional effect that can increase the strength to ensure reliability.

Thus, the present invention is to implement the advantage to implement the vibration damping effect through the heat of resistance by passing a current to the shape memory alloy to obtain the force required for vibration damping.

In other words, the present invention relates to a method of controlling by varying the rigidity of the center bearing for the vibration damping of the propeller shaft, applying a shape memory alloy (SMA) to the center bearing, the heat of resistance through an electrical signal By varying the stiffness of the bearings by changing the stiffness, it is possible to change the damping value of the propeller shaft vibrations and to effectively damp the vibrations.

In the above description of the vibration damping means employed for the propeller shaft center bearing of the present invention with reference to the accompanying drawings, the present invention has been described based on a specific shape and direction, but various modifications and changes can be made by those skilled in the art. And changes should be construed as being included in the scope of the present invention.

According to the present invention, a new vibration damping method that replaces the bending vibration control of the existing center bearing can be commercialized in a product such as a drive shaft of a vehicle or a spindle of a machine tool having a double joint and a propeller shaft connected by a plurality of joints. .

10: bodywork,
20: propeller shaft,
50: center bearing,
55 lattice member
70: adjusting member.

Claims (2)

In the center bearing of the propeller shaft is installed in the longitudinal direction between the transmission and the drive wheel to transfer the drive force is completed to the drive wheel,
The vehicle body of the vehicle on which the propeller shaft is mounted is provided with a center bearing having a vibration damping function so that an effective vibration attenuation is achieved by changing a damping value of vibration transmitted from the shaft.
The center bearing includes a lattice member of a shape memory alloy material in which a plurality of molding cells are formed by forming a first strip and a second strip having a continuous cross section in a cross shape, and having a plurality of molding cells. It includes a control member for supplying a current to the current and adjust its strength,
The outside of the center bearing is a vibration damping device for a propeller shaft center bearing, characterized in that the protective cover is formed of a synthetic resin or rubber material. delete

Images