KR19990012030A - How to balance the propeller shaft assembly for automobiles - Google Patents

Abstract

The present invention discloses a method for balancing a propeller shaft assembly for a vehicle.

The first and second propeller shafts 11 and 12 are flanged joints so that the power of the engine is transmitted from the output shaft 21 of the transmission 20 to the input shaft 51 of the longitudinal reduction gear device 50. (30) (31) As a method for adjusting the rotational imbalance of the propeller shaft assembly (10) constituted by the fastening of the universal joint (51), the propeller shaft assembly (10) during balancing testing of the propeller shaft assembly (10). When rotational imbalance occurs in the first and second propeller shafts 11 and 12 of the weight bolt 60 and the weight nut, which are fastening means so that the balance of the propeller shaft assembly 10 is maintained at a position corresponding thereto, 61) The weight of the weight washer 62 is appropriately selected and tightened.

Therefore, the balance of the propeller shaft assembly is simply and easily performed by the fastening of the weight bolt and nut and the weight washer, thereby significantly improving workability and maintaining the strength of the propeller shaft assembly at the initial design value, thereby improving reliability. In addition, the driving stability of the car is improved. In addition, the propeller shaft assembly can be balanced in a general automotive repair shop, which effectively improves after-sales service and eliminates customer complaints such as the need to replace the propeller shaft assembly, thereby improving product competitiveness.

Description

How to balance the propeller shaft assembly for automobiles

The present invention relates to a motor vehicle, and more particularly, to a method for balancing a propeller shaft assembly for a vehicle in which adjustment and modification of a balance are easily and simply performed.

A vehicle travels on a road using the power of an engine, and the structure of a vehicle can be divided into a chassis having a device functionally large for driving and a vehicle body for accommodating people or cargo.

On the other hand, the engine power is transmitted to the wheel alignment by a clutch, a transmission, and a power transmission device composed of a propeller shaft assembly, a longitudinal reduction gear device, a differential device, and the like.

In addition, the power transmission method of the vehicle can be divided into front wheel, rear wheel driving method, and four-wheel driving method, the propeller shaft assembly is installed in the rear wheel or four-wheel drive of the vehicle to transfer power from the transmission to the derailleur gear device. .

Looking at such a conventional vehicle propeller shaft assembly, the propeller shaft assembly is connected to one end of the first propeller shaft by the output shaft and the flange joint of the transmission, the other end of the first propeller shaft is centered It is connected to one side of the bearing.

One end of the second propeller shaft is connected to the other side of the center bearing by a universal joint, and the other end of the second propeller shaft is connected by an input shaft and a flange joint of the reduction gear.

Thus, the engine's power is transmitted to the longitudinal reduction gear by the rotation of the first and second propeller shafts in the transmission.

Meanwhile, in the propeller shaft assembly, a rotational imbalance occurs when the propeller shaft assembly is rotated due to the machining and assembly errors of the first and second propeller shafts or the difference in mass.

Since the rotational imbalance of the propeller shaft assembly greatly deteriorates the driving stability of the vehicle, the rotational imbalance of the assembled propeller shaft assembly is corrected through a balancing test.

That is, the rotational imbalance of the propeller shaft assembly is measured by a balancer and then balanced by the balance weight on the outer circumferential surfaces of the first and second propeller shafts on which the rotational imbalance occurs. Here, the counterweight is usually made of a lead-based alloy.

However, the above-described conventional propeller shaft assembly for automobiles has a problem in that workability is remarkably deteriorated because it uses a separate counterweight to correct rotational imbalance.

For example, in the case where rotational imbalance occurs due to the difference in mass at both ends and the center of the first and second propeller shafts, since the counterweight must be attached by welding at the corresponding position, it becomes cumbersome and difficult to attach the counterweight. .

In addition, as the balance weight is attached by welding, weld corrosion and welding stresses are generated at the heat affected portions of the first and second propeller shafts to which the balance weight is attached, so that the strength becomes weak and reliability is lowered.

In addition, the balancing weight is likely to fall easily from the first and second propeller shafts due to vibration and shock, and thus has a problem of deteriorating driving stability such as acting as a main cause of vibration during driving of the vehicle.

On the other hand, after the rotational imbalance of the propeller shaft assembly is corrected by the attachment of the counterweight, the propeller shaft assembly is shipped to the vehicle, and when the rotational imbalance occurs in the propeller shaft assembly of the shipped vehicle, There was a problem that there was no way to cope.

That is, in order to measure the rotational imbalance of the propeller shaft assembly mounted on the vehicle by attaching a balance weight, it is very difficult to correct the rotational imbalance of the propeller shaft assembly in a general automobile repair shop.

Therefore, when a rotational imbalance occurs in the propeller shaft assembly of the shipped car, the propeller shaft assembly is being replaced, and the replacement of the propeller shaft assembly causes the consumer's economic burden to operate, which causes the consumer's dissatisfaction. There was a problem that the competitiveness of the product is lowered.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to adjust the rotational imbalance by a simple process, as well as easy to easily modify the rotational imbalance for automobile propeller shaft assembly To provide a way to balance

1 is a perspective view for explaining the balance adjustment method of the propeller shaft assembly according to the present invention,

Figure 2 is a perspective view showing a fastening means used in the balancing method of the propeller shaft assembly according to the present invention,

Figure 3 is a front view showing an application example of the fastening means used in the balancing method of the propeller shaft assembly according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: Propeller Shaft Assembly

11,12: first and second propeller shaft 20: transmission

30, 31: flange joint 35: universal joint

40: center bearing 50: longitudinal reduction gear device

60: wedge bolt 61: wedge nut

62: wedge washer

A feature of the present invention for achieving this object is that the first and second propeller shafts are configured by the fastening of the flange joint and the universal joint such that the power of the engine is transmitted from the output shaft of the transmission to the input shaft of the longitudinal reduction gear device. A method for adjusting the rotational imbalance of the propeller shaft assembly, wherein, in the balancing test of the propeller shaft assembly, if the rotational imbalance occurs in the first and second propeller shafts of the propeller shaft assembly, the balance of the propeller shaft assembly is adjusted to the corresponding position. There is a method for adjusting the balance of the propeller shaft assembly for a vehicle to properly select and fasten the weight of the weight bolt and weight nut, the weight washer as the fastening means.

Hereinafter, a preferred embodiment of the balancing method of the propeller shaft assembly for automobiles according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 is a view showing for explaining the balance adjustment method of the propeller shaft assembly for a vehicle according to the present invention.

As shown in FIG. 1, one end of the first propeller shaft 11 is connected to the propeller shaft assembly 10 by the output shaft 21 and the flange joint 30 of the transmission 20, and the first propeller shaft is connected to the propeller shaft assembly 10. The other end of 11 is connected to one side of the center bearing 40.

One end of the second propeller shaft 12 is connected to the other side of the center bearing 40 by a universal joint 35, and the other end of the second propeller shaft 12 is an input of the longitudinal reduction gear device 50. It is connected by the shaft 51 and the flange joint 31.

Accordingly, the power of the engine is transmitted to the longitudinal reduction gear device 50 by the rotation of the first and second propeller shafts 11 and 12 in the transmission 20.

Meanwhile, the first and second propeller shafts 11 and 12 of the propeller shaft assembly 10 are respectively connected by the flange joints 30 and 31 and the universal joint 35 and the center bearing 40, respectively. Fastening means are used for this purpose.

As shown in FIG. 2, the fastening means consists of a plurality of weight bolts 60, a weight nut 61 and a weight washer 62 corresponding to the weight bolt 60.

At this time, the weight bolt 60 and the weight nut 61 is made of a different weight, for example, the weight of the weight bolt 60 and the head 60a of the weight nut 61 is about 1 ~ 20g It is manufactured to have a difference. Here, the weight bolt 60 and the head (60a, 61a) of the weight nut 61 may be manufactured to have a different weight by forming different heights.

In addition, the weight bolt 60 may be manufactured to have different weights by forming the lengths of the screws 60b differently, and the weight nut 61 may form different thicknesses, and the weight thereof may be about 1 to 20 g. It is manufactured to have.

On the other hand, the first and second propeller shafts 11 and 12 of the propeller shaft assembly 10 are rotated at high speed while being subjected to strong torsion, so to overcome this, the first and second propeller shafts 11 and 12 are overcome. ) Is made of steel pipe of hollow shape.

Although the propeller shaft assembly 10 has been shown to be manufactured in a divided form of the first and second propeller shafts 11 and 12, the propeller shaft assembly 10 may be configured as one shaft.

In addition, it is easily understood by those skilled in the art that the positions of the flange joints 30 and 31 and the universal joint 35 can be appropriately changed and manufactured as necessary.

As shown in FIG. 3, in the process of performing a balancing test of the assembled propeller shaft assembly 10 by the balancer, a difference in machining and assembly errors or masses of the first and second propeller shafts 10 and 11 is obtained. If the rotational imbalance of the propeller shaft assembly 10 occurs due to the back and the like, the weight bolt 60 and the nut at both ends and the center of the corresponding position, for example, the first and second propeller shafts 11 and 12 61 and the weight of the weight washer 62 is appropriately selected to perform the fastening operation, respectively.

That is, when the rotational imbalance of the propeller shaft assembly 10 occurs, by appropriately selecting the weight of the weight bolt 60 and nut 61, the weight washer 62 of the fastening means to perform the fastening operation, the propeller It is to correct the imbalance of the shaft assembly (10).

At this time, the weight of the weight bolt 60, the nut 61, the weight washer 62 is selected by the set data (data), and the propeller shaft assembly ( It is possible to maintain the balance of 10) accurately.

Therefore, in the present invention, the balance of the propeller shaft assembly 10 is simply and easily performed by the fastening operation of the weight bolt 60 and the nut 61 and the weight washer 62, thereby improving workability significantly.

In addition, the use of the weight bolt 60, the nut 61, and the weight washer 62 eliminates the risk of weakening the strength of the propeller shaft assembly 10 due to the welding of counterweights used in the prior art. That is, in the present invention, the strength of the propeller shaft assembly 10 is maintained at the initial design value, thereby improving reliability.

In addition, since the weight bolt 60 and the nut 61 and the weight washer 62 are eliminated by the vibrations and impacts, there is no fear that they are separated, so that the balance of the propeller shaft assembly 10 is normally maintained. Running stability is improved.

In the case where the propeller shaft assembly 10 whose rotational imbalance is adjusted by the fastening operation of the weight bolt 60, the nut 61 and the weight washer 62 is mounted on the vehicle and shipped from the vehicle, the propeller shaft of the shipped vehicle Even when rotation imbalance occurs in the assembly 10, the weight of the weight bolt 60, the nut 61, and the weight washer 62 is appropriately selected to easily and easily correct the rotation imbalance of the propeller shaft assembly 10. Can be.

Therefore, the propeller shaft assembly 10 can be balanced in a general automobile repair shop, so that after-sales service can be efficiently improved, and there is no need to replace the propeller shaft assembly 10, and as a result, consumer complaints are eliminated. Will improve the competitiveness.

On the other hand, the above-described embodiment is merely described one preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and can be changed as appropriate within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, according to the balancing adjustment method of the propeller shaft assembly for automobiles according to the present invention, the balance of the propeller shaft assembly is simply and easily performed by the fastening operation of the weight bolt and nut, and the weight washer, so that workability is remarkable. It is improved, and the strength of the propeller shaft assembly is maintained at the initial design value, thereby improving reliability and improving driving stability of the vehicle.

In addition, since the propeller shaft assembly can be balanced in a general automobile repair shop, after-sales service can be efficiently improved, and the customer's dissatisfaction such as the need to replace the propeller shaft assembly is eliminated, thereby improving the competitiveness of the product.

Claims (1)

A method for adjusting the rotational imbalance of a propeller shaft assembly in which the first and second propeller shafts are constituted by the fastening of the flange joint and the universal joint such that the power of the engine is transmitted from the output shaft of the transmission to the input shaft of the longitudinal reduction gear unit. , In the balancing test of the propeller shaft assembly 10, if a rotational imbalance occurs in the first and second propeller shafts 11 and 12 of the propeller shaft assembly 10, the propeller shaft assembly 10 at a position corresponding thereto. Method of adjusting the balance of the propeller shaft assembly for a vehicle, characterized in that the weight of the fastening means (weight bolt 60), the weight nut (61), the weight washer (62) is selected appropriately so as to maintain the balance.