JP2000081360A - Apparatus for measuring balance of propeller shaft and its use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for measuring unbalance of different types of propeller shaft without rearranging a chuck unit. SOLUTION: An adapter 30 having a shaft part 31 being mounted removably on a chuck unit 14 dedicated for sleeve yoke and a face plate 32 provided with a threaded rod for securing the flange part 7 of a flange yoke 4 is prepared. At the time of measuring unbalance of a propeller shaft 1' having flange yoke type universal joints 2 at the opposite ends, the flange yoke 7 of the universal joint 2 is supported by the chuck unit 14 dedicated for sleeve yoke through an adapter 30. At the time of measuring unbalance of a propeller shaft having a sleeve yoke type universal joint at one end, the adapter 30 is removed and the sleeve yoke is supported directly by the chuck unit 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balance measuring device for measuring unbalance of a propeller shaft of an automobile and a method of using the same.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS.
1 and 12, and the yokes 4 of universal joints 2 and 3 provided at both ends of the propeller shaft 1 on the respective vibration mounts 11 and 12.
The rotating shafts 15 and 16 provided with the chuck units 13 and 14 for supporting the rotating shaft 5 are supported.
It is directly connected to a main shaft (not shown) extending from the drive device 17 provided above, and has a structure in which rotation of the main shaft is transmitted to the propeller shaft 1 via the chuck units 13 and 14.
A speed type pickup (not shown) for detecting vibration is attached to each of the vibration mounts 11 and 12, and a signal of the pickup is transmitted to a measurement control unit 1 installed on a driving device 17.
8 is sent. The driving device 17
Is provided with a rotary encoder 19 for detecting the rotation angle of the main shaft, that is, the rotation angle of the propeller shaft 1, and its signal is also sent to the measurement control unit 18.

In the balance measuring device 20 described above, the propeller shaft 1 is attached to the chuck units 13 and 14.
After the yokes 4 and 5 of the universal joints 2 and 3 at both ends of the propeller shaft 1 are supported, the propeller shaft 1 is rotated by the operation of the driving device 17. If the propeller shaft 1 is unbalanced, the vibration mounts 11 and 12 are moved. The vibration causes an induced electromotive force in the pickup, and the measurement control unit 18 calculates the amount and direction of the unbalance of the propeller shaft 1 based on the signal from the pickup and the signal from the rotary encoder 19, and The result is displayed on a display (not shown).

[0006] The balance measuring device 20 is usually provided with a welding device 21. This welding device 21
Supplies power to the support frame 22 extended along the propeller shaft 1 supported by the chuck units 13 and 14, two welding machines 23 mounted on the support frame 22, and each of the welding machines 23. And a welding power source 24. The two welding machines 23 are arranged corresponding to the predetermined unbalance correction positions of the propeller shaft 1, and move the predetermined balance piece 25 (FIG. 7) of the propeller shaft 1 according to the display content of the measurement control unit 18. Automatic welding on the peripheral surface.

[0005] By the way, as the propeller shaft 1,
As shown in FIG. 7 (FIG. 7), a flange yoke type universal joint 2 having a flange yoke 4 is provided at one end, and a sleeve yoke type universal joint 3 having a sleeve yoke 5 is provided at the other end. This is referred to as an A type) and a type having the flange yoke type universal joint 2 at both ends (hereinafter referred to as a B type). As shown in FIG. 8, the flange yoke 4 has a flat flange portion 7 on the base end side of the bifurcated claw portion 6 having the mounting hole 6a of the cross shaft S (FIG. 7). The sleeve yoke 5 is provided with a tubular sleeve portion 9 at the base end side of the bifurcated claw portion 8 also having the mounting hole 8a of the cross shaft S as well shown in FIG. The chuck units 13 and 14 that support the yokes 4 and 5 also have different types (mechanisms). As an example, chuck unit 13 supporting flange yoke 4
In a state where a boss portion 7a provided on the back surface of the flange portion 7 is fitted, a clamper formed by pressing the flange portion 7 to the end face by a clamp claw (not shown), As the chuck unit 14 that supports the sleeve yoke 5, a collet chuck type in which the sleeve portion 8 is fastened and fixed by the collet 14a is used.

[0006]

That is, the conventional balance measuring device (20) is equipped with dedicated chuck units 13 and 14 according to the types of the yokes 5 and 6 of the universal joints 2 and 3 at both ends of the propeller shaft. It has a structure that
For this reason, in a mixed flow production line in which the A and B types of propeller shafts are mixed and flow, it is necessary to equip both the A and B types of propeller shafts with a dedicated balance measuring device, and the cost due to double investment of the equipment There has been a problem that an increase in burden and an increase in installation space cannot be avoided. As a countermeasure, some balance measuring devices are commonly used for both A and B types of propeller shafts by changing the chuck units 13 and 14, but in this case, Not only does it take a lot of time to change the setup, but the deterioration of measurement accuracy due to assembly accuracy is unavoidable, and a fundamental solution cannot be achieved.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to be able to share a propeller shaft of a different type without changing a chuck unit, thereby reducing equipment costs. It is an object of the present invention to provide a propeller shaft balance measuring device and a method of using the same, which greatly contribute to reduction of the installation space and installation space.

[0008]

To achieve the above object, a propeller shaft balance measuring apparatus according to the present invention comprises a pair of chuck units for supporting yokes of universal joints at both ends of a propeller shaft. In a balance measuring device that rotates a propeller shaft through a pair of chuck units and measures the unbalance,
One of the pair of chuck units is dedicated to the flange yoke, and the other is dedicated to the sleeve yoke, and can support a detachable shaft portion and a flange yoke in the chuck unit dedicated to the sleeve yoke. An adapter having yoke support means is provided. In the apparatus of the present invention, the adapter is supported as a sleeve yoke dummy by the chuck unit dedicated to the sleeve yoke, so that the flange yoke can be supported using the yoke support means.

Therefore, when measuring the unbalance of the A-type propeller shaft as in the method invention according to claim 2, each chuck unit directly supports a corresponding yoke (flange yoke, sleeve yoke). When measuring the unbalance of a B-type propeller shaft, a chuck unit dedicated to a sleeve yoke may support a flange yoke via an adapter, and this apparatus may be used to balance the propeller shafts of both A and B types. Can be shared for measurement.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 (1) and 2 (2) show a first embodiment of the present invention. The overall structure of the balance measuring apparatus is the same as that shown in FIG. 6 described above, and the structures of the universal joints 2 and 3 at both ends of the propeller shaft to be measured are also shown in FIGS. Since they are the same as those shown, here, only the main parts are shown, and the same parts are denoted by the same reference numerals.

In the first embodiment, the sleeve yoke 5 of the universal joint 3 at one end of the propeller shaft 1 is provided.
An adapter 30 similar to that shown in FIG. 7 is separately prepared, and when measuring the unbalance of a B-type propeller shaft 1 ′ having flange yoke type universal joints 2 provided at both ends, the flange yoke 4 at one end is connected to this adapter. 30 in that it is supported by a chuck unit (collet chuck) 14 dedicated to the sleeve yoke via 30.

More specifically, the adapter 30 has a shaft portion 31 having the same outer diameter as the sleeve portion 9 (FIG. 9) of the sleeve yoke 5 and having substantially the same length as the sleeve portion 9, and one end of the shaft portion 31. , A plurality (four in this case) of screw rods 33 which are planted on the front surface of the face plate 32 in the circumferential direction at equal intervals, and And a nut 34 that can be screwed onto the nut 33. A recess 35 is formed at the center of the front surface of the face plate 32 so that the boss 7a on the back surface of the flange portion 7 of the flange yoke 4 can be fitted thereto. Each screw rod 33 is connected to the flange 7 of the flange yoke 4.
The projection length is set to be sufficiently longer than the thickness of the flange portion 7 of the flange yoke 4. As a result, when the flange 7 of the flange yoke 4 is pushed into the adapter 30 while the screw rod 33 passes through the mounting hole, the boss 7a on the rear surface of the flange 7 is formed in the recess 3 of the face plate 32 of the adapter 30.
5 and the flange portion 7 comes into close contact with the front surface of the face plate 32. On the other hand, the screw rod 3
Since the distal end of 3 protrudes toward the front side of the flange portion 7 of the flange yoke 4, if a nut 34 is screwed into each screw rod 33, the flange yoke 4 is fastened and fixed to the adapter 33. Therefore, the screw rod 33 and the nut 34 constitute yoke support means for supporting the flange yoke 4. Each screw rod 33 has its base end press-fitted into a through-hole 32a formed in the face plate 32, thereby forming the face plate 32.
It is fixed to.

In the present balance measuring apparatus, the vibration gantry 12 (FIG. 6) on the side provided with the dedicated chuck unit 14 on the sleeve yoke 5 is different from the vibration gantry 11 on the driving device 17 side.
(FIG. 6), it is possible to approach and separate from it. When measuring the unbalance of the propeller shaft, the one side vibration base 12 is previously positioned at the retreat position separated from the other side vibration base 11. . On the other hand, when measuring the unbalance of the B-type propeller shaft 1 ′, the shaft 31 of the adapter 30 is fitted in the sleeve yoke 5 in advance into the dedicated chuck unit 14, and the adapter 30 is mounted on the chuck unit 14. Then, the propeller shaft 1 'is maintained in a horizontal state using an appropriate jig,
First, the flange yoke 2 on one end side is connected to the screw rod 33.
And the nut 34 and the adapter 30 are fixed to the adapter 30. Subsequently, the vibration base 12 on one side is advanced toward the vibration base 11 on the other side, and the flange yoke 4 on the other end of the propeller shaft 1 'is dedicated. (See FIG. 6).

Thereafter, the driving device 17 is operated as before.
By rotating the propeller shaft 1 ′ by the operation of, the amount and direction of the unbalance of the propeller shaft 1 ′ are obtained, and the welding device 21 is operated based on the result,
The balance piece 25 is automatically welded to the peripheral surface of the propeller shaft 1 '. An A-type propeller shaft 1 having a flange yoke type universal joint 2 having a flange yoke 4 at one end and a sleeve yoke type universal joint 3 having a sleeve yoke 5 at the other end (FIG. 7).
When measuring the unbalance, the adapter 30 is detached from the chuck unit 14, the sleeve unit 5 is directly supported by the chuck unit 14, and the flange yoke 4 is supported by the chuck unit 13 on the other side. The imbalance is measured and corrected (FIG. 6).

FIGS. 3A and 3B show an adapter 40 used in the second embodiment of the present invention. The adapter 40 has a shaft portion 4 having the same outer diameter as the sleeve portion 9 (FIG. 9) of the sleeve yoke 5 and having substantially the same length.
1 and a cross-shaped face plate 4 connected to one end of the shaft portion 41
2 and a fixing bolt 43 screwed to the face plate 42 from the rear side. At the front end of each cross piece of the face plate 42, a fitting portion 44 having a U-shaped cross section and having a flange piece 44a as a component is provided.
3 is disposed at a position close to the fitting portion 44.

The fitting portion 44 provided on the face plate 42 of the adapter 40 has its bottom surface arranged on a pitch circle P slightly larger than the maximum diameter of the flange portion 7 of the flange yoke 4. The end face of the flange piece 44a has a pitch circle Q slightly larger than the minimum diameter of the flange portion 7.
Is placed on top. Also, the gap L in the fitting portion 44
Is set to be slightly larger than the thickness of the flange portion 7, and further, in the center of the front surface of the face plate 42, a concave portion in which the boss portion 7 a on the back surface of the flange portion 7 of the flange yoke 4 can be fitted. 45 are formed. That is, by appropriately adjusting the rotational phase of the flange portion 7, the flange yoke 4 can be pushed into the face plate 42 so as to be brought into surface contact with the flange portion 7, and can be housed in the fitting portion 44. Has become. The bolt 43 of the adapter 40
Are arranged at positions matching the mounting holes 7b formed in the flange portion 7 of the flange yoke 4, and the flange portion 7 of the flange yoke 4 is housed in the fitting portion 44 and is appropriately positioned and then fixed. When the bolt 43 is screwed in, its tip is inserted into the mounting hole 7b, and the flange portion 7 of the flange yoke 4 is prevented from rotating with respect to the face plate 42. on the other hand,
In this state, since the flange portion 7 of the flange yoke 4 is prevented from being pulled out of the face plate 42 by the flange piece 44a of the fitting portion 44, the position of the flange yoke 4 is securely fixed to the adapter 40. Therefore, the fixing bolt 43
The fitting portion 44 constitutes yoke support means for supporting the flange yoke 4.

In the second embodiment, when measuring the unbalance of the B-type propeller shaft 1 '(FIG. 1), similarly to the first embodiment, a chuck unit dedicated to a sleeve yoke is used in advance. 14 is fitted with the shaft portion 41 of the adapter 40, and the adapter 40 is mounted on the chuck unit 14. At this time, the fixing bolt 43 of the adapter 40 is sufficiently loosened. Then, while maintaining the propeller shaft 1 'in a horizontal state using an appropriate jig, first, while rotating the propeller shaft 1', the flange portion 7 of the flange yoke 4 is pushed into the face plate 42 side of the adapter 40, Subsequently, the propeller shaft 1 ′ is further turned to connect the flange portion 7 to the fitting portion 44 of the face plate 42.
And the mounting holes 7 b are aligned with the fixing bolts 43. Next, the fixing bolt 43 is screwed in, and the front end portion is inserted into the mounting hole 7b.
Fix the position with respect to. After that, similarly to the first embodiment, the vibration stand 12 on one side is replaced with the vibration stand 11 on the other side.
, The flange yoke 2 at the other end of the propeller shaft 1 ′ is supported by a dedicated chuck unit 13 (FIG. 6), and the unbalance is measured and corrected by rotating the propeller shaft 1 ′. In the second embodiment, after the propeller shaft 1 ′ is rotated and positioned, the adapter 4 is merely screwed in the fixing bolt 43.
Since the flange yoke 4 can be fixed at 0, its attachment / detachment work is simplified.

FIGS. 4A and 4B show an adapter 50 used in the third embodiment of the present invention. The feature of this adapter 50 is that a ball 51 is used in place of the fixing bolt 43 in the second embodiment. In this case, the ball 51 is housed in a through hole 52 formed in the face plate 42, and the back of the ball 51 is engaged with a plug 53 screwed to the open end of the through hole 52 at one end.
4 for urging forward. In the third embodiment, while rotating the propeller shaft 1 ', the flange portion 7 of the flange yoke 4 is pushed into the face plate 42 of the adapter 40, and subsequently, the propeller shaft 1' is further rotated to rotate the flange. The mounting hole 7b of the part 7 is
And a part of the ball 51 is attached to the mounting hole 7b.
As a result, the flange 7 is automatically fixed in position with respect to the adapter 40. That is, the tightening operation of the nut 35 as in the first embodiment or the second
The operation of screwing the fixing bolt 43 as in the embodiment is unnecessary, and the operation of attaching and detaching the fixing bolt 43 becomes simpler. Therefore, in the third embodiment, the ball 5
1, the plug 53, the spring 54, and the fitting portion 44 constitute yoke support means for supporting the flange yoke 4.

The yoke support means in the third embodiment can be configured such that a stepped pin 60 is provided instead of the ball 51 as shown in FIG. In this case, by providing the step portion 52a in the through hole 52 formed in the face plate 42, the allowance for the protrusion of the pin 60 can be always kept constant, and the pin 60 can be unnecessarily attached to the flange portion 7. It does not enter the hole 7b (FIG. 4).

[0020]

As described in detail above, according to the propeller shaft balance measuring apparatus and the method of using the same according to the present invention, the adapter is supported by the chuck unit dedicated to the sleeve yoke as a sleeve yoke dummy. This allows the flange yoke to be supported by using the yoke support means of the adapter, so that one unit of the present apparatus can be shared with different types of propeller shafts without changing the chuck unit, and especially in small-scale production. This greatly contributes to reducing equipment costs and installation space in a mixed production line.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of a balance measuring device for a propeller shaft according to the present invention and its use mode as a partial cross section.

FIG. 2 is a front view and a cross-sectional view showing a structure of an adapter used in the present balance measuring device.

FIG. 3 is a front view and a sectional view showing another structure of the adapter.

FIG. 4 is a front view and a sectional view showing still another structure of the adapter.

FIG. 5 is a sectional view showing a modified structure of the adapter shown in FIG. 4;

FIG. 6 is a side view showing a general structure of a balancer for a propeller shaft.

FIG. 7 is a side view showing a mode of supporting the propeller shaft by the balance measuring device shown in FIG. 6;

FIG. 8 is a side view showing, as a partial cross section, a flange yoke at one end of a propeller shaft and a supporting state thereof.

FIG. 9 is a side view showing a sleeve yoke at one end of the propeller shaft and a supporting state thereof as a partial cross section.

[Explanation of symbols]

 1, 1 'Propeller shaft 2, 3 Universal joint 4 Flange yoke 5 Sleeve yoke 7 Flange part of flange yoke 11, 12 Vibration mount 13 Chuck unit dedicated to flange yoke 14 Chuck unit dedicated to sleeve yoke 30, 40, 50 Adapter 31, 41 Shaft part 32, 42 Face plate 33 Screw rod (yoke support means) 34 Nut (yoke support means) 43 Bolt (yoke support means) 44 Fitting part (yoke support means) 51 Ball (yoke support means) 60 Pin (yoke) Support means)

Claims (2)

[Claims] 1. A balance measuring apparatus comprising: a pair of chuck units for supporting yokes of a universal joint at both ends of a propeller shaft; and rotating the propeller shaft via the pair of chuck units to measure an unbalance thereof. One of the pair of chuck units is dedicated to the flange yoke, and the other is dedicated to the sleeve yoke, and can support a detachable shaft portion and a flange yoke in the chuck unit dedicated to the sleeve yoke. An apparatus for measuring balance of a propeller shaft, comprising an adapter having yoke support means. 2. A method using the balance measuring device according to claim 1, wherein when measuring the unbalance of a propeller shaft having a flange yoke type universal joint and a sleeve yoke type universal joint at both ends, Each chuck unit directly supports the corresponding yoke, and when measuring the unbalance of a propeller shaft having flange yoke type universal joints at both ends, the flange yoke is supported via an adapter by the chuck unit dedicated to the sleeve yoke. A method for using a balance measuring device, characterized in that: