KR20090058667A - Propeller shaft fixing bracket - Google Patents

Abstract

A propeller shaft fixed bracket is provided to prevent from the vibration energy being delivered to the car body and to improve the durability. Therefore the road noise of the vehicles can be prevented. A propeller shaft fixed bracket comprises a first bracket(10) supporting left and right side of the propeller shaft(1) and absorbs the horizontal direction vibration of the propeller shaft; and a second bracket(20) absorbing the vertical direction vibration of the first bracket. The first bracket supports left and right side of the propeller shaft by using the side spring(11), and side spring is installed in the horizontal direction. The second bracket absorbs the vertical direction vibration of the first bracket by using the vertical spring(21), and the vertical spring is perpendicularly installed on the top of the first bracket.

Description

Propeller shaft fixing bracket

The present invention relates to a propeller shaft fixing bracket, which is formed to prevent the transmission of vibration energy to the vehicle body by controlling translational displacement and angular displacement in each direction due to vibration transmitted to the propeller shaft, thereby improving quietness and durability of the vehicle. The invention relates to a propeller shaft fixing bracket.

The vehicle obtains driving power by transmitting the power of the engine to the drive shaft. The transmission of the power is composed of a flywheel, a clutch, a transmission, and a drive shaft. That is, the rotational force of the flywheel rotated according to the rotation of the engine is transmitted to the transmission through the clutch, and the transmission is shifted to an appropriate rotational speed according to the speed of the vehicle, and then the driving shaft is rotated to obtain driving force.

In general, a front engine rear driving (FR) vehicle is provided with a propeller shaft to transfer rotational power generated from the engine to the driving wheels. It is common to use hollow carbon steel pipes such as these propeller shafts, and because they rotate at high speed while being subjected to constant torsional torque, long propeller shafts are easily generated due to vibration.

Recently, two or three propeller shafts are used, and they are connected to each other via universal joints. In particular, in the case of large trucks, engines and transmissions and drive axles that generate driving power are driven. Due to the distance between the axle) and the constraints on the vehicle layout and the dangerous speed constraint of the propeller shaft, a multi-piece propeller shaft that uses a plurality of propeller shafts is applied. have.

Hereinafter, the structure of the propeller shaft and the problems thereof according to the prior art will be described with reference to the accompanying drawings.

1 is a perspective view showing the structure of a general propeller shaft, Figure 2 is a perspective view showing the structure of a propeller shaft fixing bracket according to the prior art.

As shown in Figure 1, in the case of FR vehicle propeller shaft is used to send the rotational force of the engine to the Diff, wherein the propeller shaft is made of 1-piece or 2-piece depending on the length or required characteristics of the vehicle.

The propeller shaft (1) is fixed to the vehicle body by the center bracket (2) as shown in Figure 2, in the case of 1-piece, the propeller shaft (1) itself does not have an angle of the car body vibration (shutter) ), But there is a disadvantage that resonance noise occurs at the main driving speed (2500 ~ 3000rpm) of the vehicle due to lack of rigidity (low resonance frequency). Resonant noise at the running speed can be avoided, but shudder problems can occur because of the possibility of cutting off.

In the use of a two-piece propeller shaft (1), the rudder generates vibrations due to an abnormal change in torque caused by the cutting between the drive shaft and the driven shaft, which is transmitted to the body through the center bracket. Since the rotating shaft is strongly fastened to the vehicle body through the center bracket, the rudder vibration generated in the shaft is inevitably transmitted to the vehicle body.

Methods for reducing the rudder include 1) reducing the cutting angle, and 2) reducing the body transmission force. Since cutting may exist not only on the propeller shaft, but also on the TM side and the Diff side, the propeller shaft (1 Solving the inside of the crust alone does not solve the fundamental shudder.

Therefore, in the general vehicle development stage, the process of finding the minimum point of the rudder by reflecting the position of the center bracket and the shaft by changing the position of the fastening point (a change of angle) is used. As a result, improvements are often slow and design constraints often prevent effective resolution. In addition, a rubber bush is used between the center bracket and the shaft in order to reduce the vehicle transmission force, but this has only a limited effect.

The present invention is to solve the above problems, it is formed to prevent the transmission of vibration energy to the vehicle body by controlling the translational movement displacement and angular displacement of each direction by the vibration transmitted to the propeller shaft to improve the quietness and durability of the vehicle The purpose is to provide a propeller shaft fixing bracket.

In order to solve the above problems, the present invention in the fixed bracket for fixing the propeller shaft of the vehicle to the vehicle body, the left and right sides of the propeller shaft is supported by the side spring installed in the horizontal direction to absorb the horizontal vibration of the propeller shaft The first bracket and the second bracket which is formed on the upper side of the first bracket to absorb the vertical vibration of the first bracket by the vertical surface of the mounting surface in the vertical direction.

As described above, the present invention is formed to prevent the transmission of vibration energy to the vehicle body by controlling translational displacement and angular displacement in each direction due to vibration transmitted to the propeller shaft, thereby exhibiting an excellent effect of improving the quietness and durability of the vehicle. do.

Hereinafter, the structure of the present invention will be described in detail with reference to the accompanying drawings. However, the description of the same configuration as the prior art will be omitted.

Figure 3 is a perspective view showing the structure of the propeller shaft fixing bracket according to the present invention, Figure 4 is a plan view showing the main portion of the propeller shaft fixing bracket according to the present invention.

4 and 5, in the fixing bracket for fixing the propeller shaft 1 of the vehicle to the vehicle body 2, side springs 11 horizontally installed on both left and right sides of the propeller shaft 1 are provided. The first bracket 10 which absorbs the horizontal vibration of the propeller shaft and the first bracket 10 is formed on the first bracket 10 in the vertical direction and is installed in the vertical direction. Characterized in that the second bracket 20 to absorb the vertical vibration of the bracket (10).

In this case, the second bracket 20 may be formed by forming a pair of vertical guides 22 having a plate shape parallel to each other, and several vertical springs 21 installed at equal angles between the vertical guides 22. In addition, the second bracket 20 may be implemented by combining with the vehicle body via the leaf spring 30.

The basic concept of the present embodiment is to absorb the vibration energy of the shaft as the elastic energy of the spring to reduce the vibration energy transmitted to the vehicle body. Since the vibration energy has six degrees of freedom in space, the energy corresponding to each degree of freedom is the elastic energy. It is carried out by forming a structure to absorb.

In order to absorb the horizontal vibration of the propeller shaft 1, the horizontal spring 11 and the horizontal guide 12 are installed in the left and right directions of the portion to which the propeller shaft 1 is connected.

In addition, a second bracket 20 having an elastic force is formed as a means for absorbing vertical vibrations. As a specific example of the second bracket 20, a disk-shaped vertical guide 22 mounted in parallel and the vertical A plurality of vertical springs 21 consisting of six or eight on the guide 22 are installed at equal angles so that each vertical spring 21 is stretched to a different length when vibration is transmitted to the vertical guide 22. It is reasonable to implement so as to absorb the vertical displacement and the angular displacement generated in the X, Y axis of FIG.

By combining the first bracket 10 and the second bracket 20 can be carried out to absorb all the horizontal, vertical displacement and each displacement occurring in the X, Y axis of Figure 3, in addition, Z axis of Figure 3 The first bracket 10 and the second bracket 20 assembly may be coupled to the vehicle body via the leaf spring 30 to absorb angular displacement, that is, torsion.

By using the fastening bolt as a means of coupling the structure can be carried out to ensure convenience in assembly and repair, the vibration energy of the propeller shaft (1) is converted into the elastic energy of each degree of freedom by the above configuration, the vibration energy is This prevents the vehicle from being delivered. In particular, the three-way angular displacement as well as the Y and Z-axis translational displacement of FIG. 3 are controlled to serve to precisely absorb vibration energy.

At this time, the converted elastic energy attenuates the vibration energy of the propeller shaft 1, and part of the elastic energy is converted into vibration energy for canceling the displacement of the propeller shaft 1 by the restoring force. Therefore, the behavior of the propeller shaft 1 becomes stable, and additionally, the initial deflection of the propeller shaft 1 is reduced by allowing free displacement.

Therefore, in the present embodiment, the body transmission force of the axial vibration energy is reduced by the introduction of elastic energy by the spring, the body body transmission force reduction effect is increased by the precise energy absorption of each degree of freedom, and the limitation on the displacement or position of the shaft center portion is increased. As a result, the initial angle of the axis is reduced, the cost and complexity can be achieved without using active control, which is difficult to apply to the design, the bracket structure can be modularized, and the structure is relatively simple, making the applicability Effect is improved.

In the above, certain preferred embodiments of the present invention have been shown and described. However, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention pertains without departing from the spirit and spirit of the present invention claimed in the claims may make various modifications and variations. Implementation will be possible.

1 is a perspective view showing the structure of a general propeller shaft,

Figure 2 shows the structure of the propeller shaft fixing bracket according to the prior art

Perspective,

Figure 3 shows the structure of the propeller shaft fixing bracket according to the present invention

Perspective,

Figure 4 shows the main structure of the propeller shaft fixing bracket according to the present invention

       Floor plan.

Description of the main parts of the drawing

1: Propeller Shaft 2: Center Bracket

10: first bracket 11: horizontal spring

20: second bracket 21: vertical spring

30: leaf spring

Claims (3)

In the fixing bracket for fixing the propeller shaft of the vehicle to the vehicle body, A first bracket which absorbs the horizontal vibration of the propeller shaft by holding the right and left sides of the propeller shaft by a side spring installed in a horizontal direction; A propeller shaft fixing bracket, which is formed on an upper portion of the first bracket and is formed as a second bracket that absorbs the vertical vibration of the first bracket by a vertical surface of the mounting surface in the vertical direction. The method of claim 1, The second bracket has a pair of plate-shaped vertical guides formed in parallel, Propeller shaft fixing bracket, characterized in that formed in the eight vertical springs installed at equal angles in the vertical guide. The method according to claim 1 or 2, The second bracket is a propeller shaft fixing bracket, characterized in that coupled to the vehicle body via a plate spring.

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