KR100312884B1 - Balance tester - Google Patents

Abstract

[Objective] A balance tester for a test object, such as a crankshaft for a three-cylinder engine, that requires proper balance to be provided, and a tester capable of setting a plurality of types of imbalances by simple operation.

[Configuration] A first dummy shaft 11 provided with a pivot 11a as a first unbalanced member, in addition to the crankshaft 1, on a mold shake table 4 fastened to the base 10 of the testing machine by a spring 8. ) And a second dummy shaft 12 having a pivot 12a as a second unbalance member rotatably attached, and dismounting the one-position clutch 14 to rotate only the first dummy shaft 11. And the second position imbalance which rotates both the dummy shafts 11 and 12 together by connecting the one position clutch 14 and the one position clutch 14 so that it can be set with simple operation.

Description

Balance tester

The present invention does not set imbalance to zero, such as crankshafts used in, for example, a three-cylinder engine, a five-cylinder engine, a six-cylinder engine, or a six-cylinder engine. This invention relates to a balance tester for a test subject which needs to maintain a high precision.

Even if an engine having a number of cylinders of three or less cylinders or an engine of four or more cylinders is completely balanced by the crankshaft unit by the arrangement in the crank pin direction, the inertia force of the piscon and the reciprocating mass is not balanced. Vibration occurs. Therefore, in such a case, part of the inertial force due to the reciprocating mass is removed by leaving an appropriate imbalance on the crankshaft.

For this reason, conventionally, as shown in FIG. 4, at the position of the crank pin 2 of the crankshaft 1, the dummy weight (unbalanced member corresponding to the inverse of the imbalance of the regulation to be maintained) (3) Was attached in half, placed on a general balance tester in this state so that the imbalance became zero, and then the dummy weight 3 was dismantled so that the prescribed imbalance was set on the crankshaft 1.

This method has the advantage that unbalanced viewing by a general balance tester is performed, and it is inadequate that the dummy weight needs to be attached and dismantled to a single crankshaft and is inefficient.

Therefore, as shown in FIG. 5, the mold shake table 4 is installed in a balance tester, and the dummy shake table 4 is provided with a crank shaft 1 as a test object and a dummy weight 3 provided with a dummy weight 3. (5) are rotatably attached via the bearings 9a and 9b, respectively, so that the crankshaft 1 and the dummy shaft 5 are rotated in synchronism by the rotation drive 6, and the imbalance becomes zero. By doing so, a tester has been proposed in which a prescribed imbalance is set in the crankshaft (1).

In FIG. 5, reference numeral 6a denotes a drive shaft, reference numeral 6b denotes a gear group, reference numerals 7a and 7b denote free joints, and reference numeral 8 denotes a mold shake table suspended from the base 10 of the testing machine. Each spring is shown.

In this tester, the work of attaching a dummy weight to each crankshaft (test subject) is not required, but an unbalanced member attached to the dummy shaft 5 for other types of test subjects (test subjects having different regulations). There was an inadequacy that must be changed.

In addition, a method of measuring an imbalance formed at a predetermined position by using a general balance tester and adjusting an unbalance of a test subject so as to become a prescribed imbalance is also proposed.

However, this method is difficult to ensure accuracy when the ratio between the size of the regulation imbalance and the tolerance is large (it is because the measurement error of the balance tester tends to be proportional to the amount of imbalance), and the regulation imbalance There is an inconsistency that is limited to the case where the ratio of the size and the tolerance is relatively small.

An object of the present invention is to provide a balance tester that solves the above-mentioned inadequacies in the prior art.

In order to achieve the above object, the balance tester according to claim 1 of the present invention includes a rotary drive device, a mold shake table, and a spindle mounted on the same mold shake table, connected to the rotary drive device, and at the same time a test object is mounted. And a first dummy shaft attached to the mold shake table so as to be rotated in synchronism with the test subject by the rotation driving device, and on the inverse of the imbalance to be maintained in the first type of test subject of the first dummy shaft. A first dummy member is attached to the mold shaking table so that a first imbalance member for forming a corresponding imbalance is attached, and the second dummy shaft is attached to the mold shake table so as to rotate in synchronism with the test object through a one-position clutch. A material which forms an imbalance corresponding to the inverse of the imbalance to be maintained in the second type of test object by combining with the first imbalance member of the first dummy axis. 2 is characterized in that the imbalance member is attached.

In the balance tester according to claim 2, the balance tester according to claim 1 is provided with a first imbalance member that forms an imbalance corresponding to an inverse of an imbalance to be maintained in the test object of the first type on the spindle. And the same spindle constitutes the first dummy axis.

In addition, the balance tester according to claim 3 includes a rotation drive device, a mold shake table, a spindle mounted on the same mold shake table, connected to the rotary drive device, and at the same time a test object is mounted thereon. A plurality of dummy axes are attached by the apparatus so as to rotate in synchronism with the test object, and each imbalance that forms an imbalance corresponding to the inverse of the plural kinds of imbalances to be held in the test object on each dummy axis. A member is attached, and each said dummy shaft is connected to the said rotary lighting device via a one position clutch, respectively.

In the balance tester of the present invention described above, a plurality of dummy shafts corresponding to a plurality of types of imbalances are attached to the mold shake table, and only the dummy shafts required among them are rotated in synchronization with the subject under operation of the one-position clutch. Can be.

Hereinafter, the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of the balance tester as the first embodiment, FIG. 2 is a schematic front view of the balance tester as the second embodiment, and FIG. 3 is a dummy axis. It is a schematic side view which shows the modification of a drive mechanism.

Incidentally, in Figs. 1 to 3, the same reference numerals as those in the fourth and fifth degrees are the same members.

First, with reference to FIG. 1, the first embodiment will be described.

The balance tester of the first embodiment shown in FIG. 1 is also provided with a mold shake table 4, which is defined on the crankshaft 1 as the test object rotatably supported on the mold shake table 4 through the bearing 9b. By setting the imbalance of, the first pile shaft 11 and the second pile shaft 12 are attached to the mold shake table 4 so as to be rotatable through the shaft support 13. The first dummy shaft 11 is connected to the first drive gear shaft 6c of the rotary drive device 6 via the free connection portion 7a.

In addition, the second dummy shaft 12 is connected to the dummy shaft 11 via the one-position clutch 14.

On the second drive gear shaft 6d of the rotary drive device 6, the spindle 4a is mounted on the mold shake table 4 via the free connection portion 7b, and on which the crankshaft 1 as the test object is mounted. Connected.

And the center 11a as a 1st imbalance member is attached to the 1st dummy shaft 11. As shown in FIG. This center 11a corresponds to the inverse of the first kind of imbalance to be held in the crankshaft 1.

Moreover, the center 12a as a 2nd unbalanced member is attached to the 2nd dummy shaft 12. As shown in FIG. When this weight 12a is synthesize | combined with the 1st imbalance by the weight 11a as a 1st imbalance member, it corresponds to the inverse of the 2nd kind of imbalance which should be hold | maintained in the crankshaft 1.

In addition, also in this embodiment, the mold shake table 4 is hung on the base 10 of the testing machine by the spring 8, and the crank shaft 1 as the test object is mounted on the mold shake table 4 with the bearing 9b. It is rotatably supported through the same, and is connected to the second drive gear shaft 6d of the drive device 6 via the spindle 4a and the free connection portion 7b.

Reference numeral 15 denotes a motor as a drive source.

In the above-described configuration, in the case of a crankshaft requiring an imbalance of the first type, the one-position clutch 14 is disassembled so that only the first dummy shaft 11 rotates, and the rotary drive device 6 The crankshaft 1 is synchronously rotated with the first dummy shaft 11 and balanced so that the vibration of the mold shake table 4 becomes zero.

In the case of a crankshaft requiring a second type of imbalance, the one-position clutch 14 is connected so that the first dummy shaft 11 and the second dummy shaft 12 rotate together, and the rotary drive device 6 By this, the crankshaft 1 and the first and second dummy shafts 11, 12 are synchronously rotated to balance the vibration of the mold shake table 4 to zero.

In this way, it is possible to cope with two kinds of imbalances only by the operation of the one-position clutch 14.

Then, as shown in FIG. 3, the first and second pile shafts 11 and 12 are attached in parallel with the mold shake table 4, and between the dummy shafts (sprockets) and the spindle 4a (sprockets). The timing belt 16 may be wound around the belt, and the first and second dummy shafts 11 and 12 may be belt driven.

In this embodiment, two dummy sides are attached, but by providing the third and fourth dummy shafts and the second and third one-position clutches, it is possible to cope with the third and fourth types of imbalances.

Next, a second embodiment will be described with reference to FIG.

In the balance tester of the present embodiment, the center portion 11a is attached to the spindle 4a provided on the mold shake table 4 as the first balancing member, and the spindle 4a constitutes the first dummy axis. It is different from the balance tester. And the 2nd dummy shaft 12 is connected to the 1st drive gear shaft 6c of the rotation drive apparatus 6 via the in position gear clutch 14. As shown in FIG.

With the above-described configuration, in the case of this second embodiment, there is an advantage that the first dummy shaft can be superimposed on the spindle 4a, and the overall configuration can be simplified. And the operation and effect are not different from the case of the first embodiment.

In the first and second embodiments described above, one of the tests of the second type of imbalance has a configuration in which the first and second dummy shafts 11 and 12 are rotated together, but the deformation is performed. For example, even if it is set as the following structures, the same effect can be acquired.

That is, the 1st dummy shaft is provided so that it may rotate synchronously with a test subject through a 1st one-position clutch, and corresponds to the inverse of the imbalance of the regulation which should be hold | maintained in a 1st type of test subject on this 1st dummy shaft. Attach an imbalance member. In addition, a second dummy shaft which is rotatable in synchronization with the test object through the second one-position clutch is provided, and the second dummy axis corresponds to the inverse of the imbalance of the regulation to be held in the second test object. It is set as the structure which affixes an imbalance member.

In the case of the test object of the first type, the first one-position clutch is connected so that only the first dummy shaft rotates, and the vibration of the mold shake table is balanced to zero.

In the case of the third type of test object, the second one-position clutch is connected so that only the second dummy axis rotates, and the vibration of the mold shake table is balanced to zero.

Thus, in this modification, since there is always one rotating dummy shaft at the time of the balance test, it is advantageous in terms of noise and energy saving.

The r " one position clutch " in each of the above embodiments refers to a clutch having a mechanism capable of connecting and disengaging the rotational movement and capable of connecting only a predetermined phase relationship.

In addition, when the one-position clutch is electronic, remote or automatic operation can be performed, leading to high efficiency and energy saving.

As described above, according to the balance tester of the present invention, an advantage of changing the imbalance (dummy) to be maintained in the test object can be obtained by switching the one-position clutch.

By using this one-position clutch as an electronic clutch, the imbalance to be maintained in the EUT can be converted into an electrical signal, which can be remotely or automatically switched.

1 is a schematic front view of a balance tester as a first embodiment of the present invention.

2 is a schematic front view of a balance tester as the second embodiment.

3 is a schematic side view showing a modification of the dummy shaft drive mechanism.

4 is an explanatory diagram of one example of a conventional imbalance test method.

5 is a schematic front view of a conventional balance tester.

* Description of the symbols for the main parts of the drawings *

1: crankshaft as test object 3: dummy weight

4: mold shake table 4a: spindle

5: dummy shaft 6: rotary drive

7a, 7b: free joint 8: spring

9a, 9b: bearing 10: base of testing machine

11: first dummy shaft

11a: central weight as first unbalanced member

12: second dummy axis

12a: pivot as second unbalanced member

13: bearing support 14: one position clutch

15: Morty as drive source 16: Timing belt

Claims (3)

In the balance tester, a rotary lighting device, a mold shake table, and a spindle mounted on the same mold shake table and connected to the rotary drive device and equipped with a test object mounted thereon are provided by the mold shake table and the rotary drive device. A first dummy shaft is attached to rotate in synchronization with the test object, and a first imbalance member is attached to the first dummy axis to form an imbalance corresponding to the inverse of the imbalance to be maintained in the first type of test object. And a second pile shaft is attached to the mold vibration so as to rotate in synchronism with the test object through the one-position clutch, and the second pile shaft is combined with the first unbalanced virtue of the first dummy shaft. A balance tester characterized in that a second imbalance member is attached to form two types of imbalances corresponding to the inverses of imbalances to be maintained on two kinds of test subjects. 2. The method according to claim 1, wherein a first imbalance member is attached to the spindle, the imbalance member forming an imbalance corresponding to the inverse of the imbalance to be maintained on the test object of the first type, so that the spindle constitutes the first dummy axis. Characterized by balance testing machine. In the balance tester, a rotary drive device, a mold shake table, and a spindle mounted on a moving mold shake table are connected to the rotary drive device and mounted on a test object, and the mold shake table is mounted on the mold shake table by the rotary drive device. A plurality of dummy shafts are attached so as to rotate in synchronization with the test object, and each imbalance member is formed on the operating dummy axis to form imbalances corresponding to the inverses of the plurality of types of imbalances to be held in the test object. And each dummy shaft is connected to the rotary drive device through a one-position clutch, respectively.