KR20190075877A - The balance unbalanced sentence amount location searching and balance calibrating apparatus of the propeller shaft assembly - Google Patents

Abstract

The present invention relates to an apparatus for searching for the unbalanced amount location of a propeller shaft assembly and correcting the balance thereof, wherein the propeller shaft assembly consists of a first propeller shaft (30a) and a second propeller shaft (30b), the apparatus comprising: a reflector (110) attached to one side of an input shaft (24) of an axle (20)-side yoke coupling (23) joined to the second propeller shaft (30b); a taco sensor (120) installed on one side of the input shaft (24) to be distanced therefrom and detecting light from the reflector (110) whenever the input shaft (24) rotates to determine a reference signal; a plurality of acceleration sensors (130) installed at positions of equal intervals on the surface of a flange (22) at the edge of a casing (21) of the axle (20) to face the yoke coupling (23) and generating accelerometer signals according to unbalanced amounts for the positions; and a plurality of mass balances (140) prepared with a gap therebetween in predetermined units, temporarily installed with thread-shaped tape (150) on the outer circumferential surface of an end of the second propeller shaft (30b) adjacent to the yoke coupling (23), and sequentially tested. The unbalanced amount location can be easily found according to whether the accelerometer signals generated according to unbalance amounts for the positions match the reference signal, and an optimal mass balance for unbalanced correction of the mass balances (140) is found according to the found location and attached to a real vehicle such that the search of the unbalanced amount location and the balance correction therefor are quickly performed with the optimal mass balance mounted on the real vehicle, thereby significantly reducing time and cost required for the search and correction.

Description

[0001] The present invention relates to a balance unbalance position searching and balance calibrating apparatus for a propeller shaft assembly,

[0001] The present invention relates to a balance unevenness amount position search and balance correcting apparatus for a propeller shaft assembly, and more particularly, to a balance unevenness amount position correcting apparatus and a balance correcting apparatus for a propeller shaft assembly using a centripetal force, And to a balance unevenness amount position search and balance correcting device of a propeller shaft assembly capable of quickly and easily correcting the balance according to the searched unbalance amount position.

In order to identify the cause of the vibration noise of the driveline due to the unbalance of the rotating body such as the propeller shaft assembly of an automobile, it is ideal to find the position of the unbalance and correct the balancing.

However, it is costly and time-consuming to install the balancing equipment in order to understand the effect in the single product test phase. If the effect of balancing is not shown in the location of the unbalance, it is very risky.

In addition, balancing correction in a single product state accumulates remaining unbalance amount in assembling. Therefore, it is most preferable to correct the balance immediately when there is an abnormality in the actual assembled state.

However, the installation of the balancing equipment in the actual vehicle condition is more costly and takes more time than in the case of the single unit, so that the burden of balancing equipments is further increased.

Prior art for adjusting the balancing of such a driveline is disclosed in Korean Patent Laid-Open Publication No. 10-1999-0012030 (published on February 25, 1999) disclosed in the following patent document, "Balancing method of propeller shaft assembly for automobile" Referred to as " prior art ").

The prior art includes weight bolts fastened to flange joints of both the first and second propeller shafts, which are propeller shaft assemblies that transfer the power of the engine from the transmission to the longitudinal reduction gear device (axle), weight nut and weight washer, And a weight bolt, a weight nut and a weight washer of a proper weight so as to balance the propeller shaft assembly at a position corresponding thereto when a rotation unbalance occurs in the first and second propeller shafts during a balancing test, So that the balance of the propeller shaft assembly can be adjusted.

"Balancing Method of Propeller Shaft Assemblies for Cars" of Korean Patent Publication No. 10-1999-0012030 (published Feb. 25, 1999)

In order to find the position where the rotational imbalance occurs, the prior art has to use existing equipment having various problems as described above to solve the problem caused by the balancing test in the single product or the actual car as described above. I can not.

It is an object of the present invention to provide a propeller shaft assembly capable of easily detecting an unbalance position of a drive system at a low cost and time by using centrifugal force for rotating a propeller shaft assembly in an actual vehicle state And a balance unevenness amount position search and balance correcting device for a propeller shaft assembly capable of quickly and easily correcting the balance.

When the balance unevenness position search and balance correction device of the propeller shaft assembly composed of the first propeller shaft jointly connected to the transmission and the second propeller shaft jointly connected to the axle, which is the longitudinal reduction gear device, A reflector attached to one side of the input shaft of the axle-side yoke coupling which is jointed with the second propeller shaft; A tachometer sensor installed at one side of the input shaft and adapted to sense a light of a reflection plate at every rotation of the input shaft to determine a reference signal; A plurality of acceleration sensors installed at positions of equal intervals on the flange surface of the casing rim to face the yoke coupling to generate an accelerometer signal according to the unbalance amount for each position; The mass balance, which is prepared in a plurality of units with a difference in a predetermined unit and is temporarily installed on the outer peripheral surface of the end portion of the second propeller shaft in proximity to the yoke coupling and is tested in order, And the balance of the unbalance amount can be quickly corrected, so that the above object can be achieved.

The mass balances prepared as a plurality of the above are prepared in a thin thin plate shape with a difference in a certain unit within a range of 1 g to 10 g and are temporarily installed on the outer peripheral surface of the end portion of the second propeller shaft for a plurality of mass balance tests Type tape which does not substantially change the weight or mass feeling and does not affect the balance correction.

In the present invention, while the propeller shaft assembly is actually assembled, the propeller shaft is rotated in one direction, and the position of the uncompensated position of the second propeller shaft is easily searched by comparing whether the reference signal of the tachometer sensor and the acceleration signal of the acceleration sensor match each other The time and cost required for the search can be significantly reduced.

After searching the position of the unbalance displacement of the drive system in a state of being mounted on the actual vehicle, several mass balances prepared by varying a certain unit in the end portion of the second propeller shaft coinciding with the searched position are sequentially tested, Since the balance can be found and attached, the balance correction of the unbalanced portion can be performed very quickly and easily, thereby significantly reducing the noise level and the vibration level in the E-coupling to the driver, have.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing a propeller shaft assembly drawing
2 is a view showing a state in which a reflector, a tachometer sensor, and an acceleration sensor of the present invention are provided in an axle;
Fig. 3 is a view showing a state where the centripetal force acts when the axle is rotated by the present invention
FIG. 4 is a diagram illustrating a signal search table of an accelerometer according to the present invention,
5 shows a state in which the mass balance of the present invention is temporarily installed on the second propeller shaft
6 is a graph showing that the indoor driver noise level is reduced by the present invention
7 is a graph showing the vibration level reduction state in E-coupling according to the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing a propeller shaft assembly in which the present invention is implemented, FIG. 2 is a view showing a state in which a reflector, a tachometer sensor and an acceleration sensor of the present invention are provided in an axle, It is a state in which centripetal force acts.

The present invention shown in the drawings is a balance complaint of a propeller shaft assembly composed of a first propeller shaft 30a jointly connected to a transmission 10 and a second propeller shaft 30b jointly connected to an axle 20, A reflector 110 attached to one side of the input shaft 24 of the yoke coupling 23 on the side of the axle 20 which is jointed with the second propeller shaft 30b when the apparatus for position detection and balance correction is constructed. And a tachometer sensor 120 installed at one side of the input shaft 24 for sensing the reflection plate 110 and determining a reference signal whenever the input shaft 24 rotates.

The accelerometer signal is generated on the surface of the flange 22 provided at the rim of the casing 21 of the axle 20 so as to face the yoke coupling 23 at an equal interval, A plurality of acceleration sensors 130 for sensing the acceleration sensor 130; And a mass balance 140 which is prepared in a plurality of predetermined units and is temporarily installed on the outer peripheral surface of the end portion of the second propeller shaft 30b adjacent to the yoke coupling 23 and tested in order .

The present invention relates to a propeller shaft assembly comprising a propeller shaft assembly consisting of a first propeller shaft 30a jointed with the transmission 10 and a second propeller shaft 30b jointed to the axle 20, The reflector 110, the tachometer sensor 120, and the acceleration sensor 130 are installed at the "No. 3" site where the displacement due to the unbalance is most severely generated among the "No. 2" and "No. 3" positions, The installation state thereof is as shown in FIG. 2 and FIG.

After the installation, the vehicle speed is generally measured at a speed of 100 km / h, which is a vibration noise problem area of the vehicle, and a cruise control function is preferably used for constant speed driving.

Here, the centrifugal force is applied to the object in the circular motion (rotational motion) in the direction of the rotation center during the constant velocity motion, and the position of the centripetal force can be tracked using the accelerometer and the tachometer sensor 120.

Here, when the input shaft 24 to which the second propeller shaft 30b and the yoke coupling 23 are coupled is rotated in the clockwise direction, if there is an unbalance amount at the position of the acceleration sensor 130 at the 5th position, Position acceleration sensor 130, which is shown in FIG.

4 is a signal obtained by applying a low-pass filter to the time signal when the input shaft 24 is rotated as shown in FIG. 3 as a signal search table of the position-specific accelerometer based on the signal of the tacho sensor according to the present invention.

In FIG. 4, it can be confirmed that the waveform signal of the acceleration sensor 130 at the position 1 most closely matches the signal of the taco sensor 120 as the reference signal, so that the centripetal force acts on the first acceleration sensor 130 , And the unbalance amount position is on the fifth acceleration sensor 130 side.

As described above, according to the present invention, when the propeller shaft is rotated in one direction while the propeller shaft assembly is assembled in the actual car, the position of the acceleration sensor 130 is matched with the reference signal of the taco sensor 120, The location can be easily navigated, which can significantly reduce the time and cost involved in navigating the unbalanced location.

In the present invention, a method of correcting the balance using the driving force unbalance position search apparatus using the centripetal force is as follows.

<First step> (search for unequilibrium position)

The first step is a step of performing the above process using the driving force unbalance position search apparatus using the centripetal force to search for the unbalanced position by the reference signal of the tacho sensor 120 and the acceleration signal of the acceleration sensor 130.

That is, every time the input shaft 24 with the reflection plate 110 is rotated by one rotation, the tachometer sensor 120 senses the reflection plate 110 to generate a reference signal, A plurality of acceleration sensors 130 installed at equal intervals on the surface of the flange 22 sense the centripetal force with the position-specific accelerometer signal.

Then, it can be determined which position the waveform acceleration signal of the acceleration sensor 130 most closely matches the reference signal of the tachometer sensor 120.

Thus, for example, if the acceleration signal at the position of the first acceleration sensor 130 matches the reference signal, the centripetal force acts on the first acceleration sensor 130, and the unbalanced position is on the fifth acceleration sensor 130 side . &Lt; / RTI &gt;

<Second Step> (Finding the Balance of Mass for Unbalance Adjustment)

In the second step, a plurality of mass balances 140 prepared in a predetermined unit for balance correction of the unbalanced position are searched in order, and the second propeller shaft 30b, which is adjacent to the yoke coupling 23, 5, the first step is repeatedly performed to find the mass balance 140 in which the balance correction of the unbalanced position is performed optimally.

The mass balance 140 is preferably formed of a flexible material having a bending property such as a lead so as to be in contact with the outer circumferential surface of the second propeller shaft 30b while being in the form of a thin foil.

Since the unbalance of the unbalanced position usually does not exceed 10 g, it is preferable that the mass balance 140 is prepared so that the mass balance 140 gradually increases from 1 g to 10 g in a predetermined unit (for example, 1 g unit).

The mass balance 140 is attached to the outer circumferential surface of the end of the second propeller shaft 30b corresponding to the searched unbalance amount position several times in units of small increments or vice versa, It is desired to find the mass balance 140 in which the optimum balance correction is performed by testing how much it is corrected.

In this test step, when the mass balance 140 is installed on the outer peripheral surface of the end of the second propeller shaft 30b, the sealant tape 150, which does not completely adhere to the end surface of the second propeller shaft 30b, It is preferable that the mass balance 140 is temporarily adhered.

The mass balance (140) is easily detached and attached so that it can be quickly tested while changing to the other mass balance (140), and the taped seal tape (150) does not change the weight or mass. It is possible to find exactly which mass balance 140 can be an optimal balance correction.

<Third Step> (Mass Balance Complete Attachment Step)

In the third step, when the mass balance 140 of the unit in which the balance is optimally corrected is found by the second step, the taped thread-form tape 150 is peeled off and the mass balance 140 is applied to the second propeller shaft 30b And is completely attached to the outer peripheral surface of the end portion by an adhesive means.

As a result of correcting the imbalance of the position of the unshaped portion of the drive system by the above process, the noise level applied to the indoor driver is significantly reduced as shown in FIG. 6, and the vibration level in the E-coupling is reduced as shown in FIG.

Accordingly, in a state where the propeller shaft assembly is mounted on the actual vehicle, the balance of the unbalance amount of the drive system can be quickly and easily corrected, and the work time and cost can be significantly reduced.

10: Transmission 20: Axle
21: casing 22: flange
23: yoke coupling 24: input shaft
30a: first propeller shaft 30b: second propeller shaft
110: reflector 120: tacho sensor
130: acceleration sensor 140: mass balance
150: thread type tape

Claims (3)

Balance unbalance position search and balance correction of a propeller shaft assembly composed of a first propeller shaft 30a jointly connected to a transmission 10 and a second propeller shaft 30b jointly connected to an axle 20 as a longitudinally- In constructing the device,
A reflector 110 attached to one side of the input shaft 24 of the yoke coupling 23 on the axle 20 side jointed with the second propeller shaft 30b;
A tachometer sensor 120 installed at one side of the input shaft 24 for detecting a light of the reflection plate 110 and determining a reference signal whenever the input shaft 24 rotates;
A plurality of accelerometers installed on the surface of the flange 22 of the casing 21 of the axle 20 at regular intervals to face the yoke coupling 23 to generate an accelerometer signal according to the unbalanced position, (130);
A mass balance 140 which is temporarily installed on the outer circumferential surface of the end portion of the second propeller shaft 30b adjacent to the yoke coupling 23 and is tested in order;
The position of the unbalance amount of the driving system and the balance correction of the unbalance amount can be quickly corrected in a state of being mounted on the actual vehicle.
The method according to claim 1,
The mass balance (140)
Wherein the thin plate is in the form of a thin plate and is prepared in a plurality of numbers with a predetermined unit difference within a range of 1 g to 10 g.
The method according to claim 1,
When temporarily installed on the outer peripheral surface of the end portion of the second propeller shaft 30b for testing a plurality of mass balances 140,
And a sealant tape (150) which does not substantially change the weight or mass feeling and does not affect the balance correction is used. The propeller shaft assembly Unbalance position search and balance correction device.

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