JP2010185808A - Balance testing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a balance testing machine capable of efficiently testing bodies to be tested different in kind. <P>SOLUTION: By supplying compressed air between the top surface part 21 of the base 2 and the undersurface part 31 of the support frame 3 by an air pressure pump 8 to reduce the contact area between the top surface of a base 2 and the undersurface of a support frame 3, or separating the top surface of the base 2 from the undersurface of the support frame 3 the friction force between the base 2 and the support frame 3 is reduced, and the support frame 3 on the base 2 is made movable smoothly with a smaller force. Thereby, arrangement of the support frame 3 can be quickly adjusted in accordance with the kind and size of each body K to be tested, so that balance tests with respect to various bodies K to be tested can be performed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a balance testing machine.

Conventionally, a balance testing machine is known as a device for measuring a balance state (that is, an unbalance amount) at the time of rotation of a rotating component (for example, a rotating body such as a crankshaft).
The balance testing machine, for example, supports both ends of a test object that is a rotating body with a pair of mounts, and transmits the rotational driving force from the drive unit to the test object to rotate the test object. The amount of unbalance is calculated by detecting the balance state of the sensor with a sensor.
In the balance testing machine, in order to measure various DUTs, the platform is moved so as to be brought into and out of contact with a moving mechanism using a ball screw, roller chain, sprocket, etc., and according to the size of the DUT. The balance is adjusted to a suitable arrangement and various types of test objects are tested (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 2000-97796

However, in the case of the above prior art, if the platform is a large machine exceeding 1 ton, in order to move the platform by driving the motor, it is necessary to increase the output of the motor, and in terms of cost and space. It is also difficult to move the gantry manually.
On the other hand, there is a problem in that the user manually moves the large gantry to take a lot of time and labor, and the work efficiency is poor.

  An object of the present invention is to provide a balance testing machine capable of efficiently testing different types of test objects.

In order to solve the above problems, the invention described in claim 1
A balance test comprising: a base; a support base that is movably mounted on the base and supports the object to be tested; and a rotation drive unit that rotates the test object supported by the support base. Machine,
A pneumatic mechanism is provided to reduce a contact area between the upper surface of the base and the lower surface of the support frame by supplying compressed air between the upper surface of the base and the lower surface of the support frame. To do.

The invention according to claim 2 is the balance testing machine according to claim 1,
The pneumatic mechanism separates the upper surface of the base and the lower surface of the support frame by ejecting compressed air.

The invention according to claim 3 is the balance testing machine according to claim 1 or 2,
The pneumatic mechanism is characterized in that the upper surface of the base and the lower surface of the support frame are brought into close contact with each other by sucking air between the upper surface of the base and the lower surface of the support frame.

According to the present invention, the pneumatic mechanism supplies compressed air between the upper surface of the base and the lower surface of the support frame, thereby reducing the contact area between the upper surface of the base and the lower surface of the support frame, The upper surface of the base and the lower surface of the support frame can be separated from each other, and the frictional force between the upper surface of the base and the lower surface of the support frame can be reduced.
In addition, the support base with reduced frictional force with the base is lighter in weight and can be moved smoothly on the base with a smaller force, making it easy to adjust the placement of the support base. Is possible.
Therefore, according to the type and size of the DUT, it is possible to quickly adjust the arrangement of the support gantry and perform a balance test for various DUTs, and efficiently test different types of DUTs. It becomes possible.

It is a side view which shows the balance testing machine which concerns on this invention. It is a front view which shows the base of a balance testing machine and a support stand in partial cross section. It is an enlarged view of the upper surface part and lower surface part which show the state by which the support stand was mounted on the base. It is an enlarged view of the upper surface part and lower surface part which show the state which the support stand spaced apart from the base.

  Hereinafter, a balance testing machine according to an embodiment of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

  FIG. 1 is a side view showing a balance testing machine 1 to which the present invention is applied, and FIG. 2 is a front view showing a partial cross section of a base 2 and a support frame 3 of the balance testing machine 1.

  As shown in FIG. 1, the balance testing machine 1 is a testing machine for measuring the balance state (unbalance amount) of a test object K that is a rotating body. A pair of support bases 3 and 3 that are placed so as to be movable and support the device under test K, and one end of the test body K supported by the support base 3 are connected to rotate the device under test K. Compressed air between the rotation drive unit 5, the control unit 6 that controls the rotation drive unit 5, the measurement unit 7 that measures the unbalance amount associated with the rotation of the DUT K, and the base 2 and the support frame 3. It is comprised by the pneumatic pump 8 etc. which are the pneumatic mechanisms which supply this.

As shown in FIG. 2, the base 2 includes an upper surface portion 21 that contacts the lower surface portion 31 of the support frame 3 on both sides of the upper surface of the base 2, and a groove portion 22 provided on the center side of the upper surface. ing.
A guide groove 23 is formed in the upper surface portion 21 along the longitudinal direction of the base 2 (left and right direction in FIG. 1).
A movement mechanism 9 that moves the support frame 3 on the base 2 along the longitudinal direction of the base 2 is disposed in the groove 22.

As shown in FIG. 2, the support frame 3 includes a lower surface portion 31 that contacts the upper surface portion 21 of the base 2 on both sides of the lower surface of the support frame 3, a groove portion 32 provided on the center side of the lower surface, and a device under test. A holding portion 34 that holds the bearing portion 4 that pivotally supports the body K, a leaf spring portion 35 that is provided near the lower portion of the holding portion 34, and the like are provided.
The support frame 3 is fixed to the base 2 by a support frame fixing screw 81 and an engaging portion 33.
Further, the lower surface portion 31 is formed with an injection port 38 for supplying compressed air between the lower surface portion 31 and the upper surface portion 21, and the injection port 38 is connected to the pneumatic pump 8. An air pipe 82 forming a part of the pneumatic mechanism is attached. An air chamber 31a (see FIGS. 3 and 4), which is a narrow space, is formed on the lower surface side of the lower surface portion 31 where the injection port 38 is formed.
A movement mechanism 9 that moves the support frame 3 along the longitudinal direction of the base 2 is disposed in the groove 32.

A sprocket 91 and a roller chain 92 of the moving mechanism 9 are provided in a space formed by the groove portion 22 of the base 2 and the groove portion 32 of the support frame 3 facing each other. A connecting shaft 93 is connected to the sprocket 91, and a handle 94 that rotates the sprocket 91 via the connecting shaft 93 is attached to one end of the connecting shaft 93. The handle 94 is provided on the side surface of the support frame 3.
By operating the handle 94, the moving mechanism 9 can be operated to move the support frame 3 on the base 2.
And it is possible to move the support bases 3 and 3 in accordance with the size of the test object K, adjust the arrangement of the support bases 3 and 3, and perform various balance tests on the test object K. .

The holding portion 34 has a concave portion 34a that opens upward. The lower support portion 41 of the bearing portion 4 is provided inside the concave portion 34a, and the upper portion of the bearing portion 4 is supported by a frame portion 42c that straddles the upper portion of the concave portion 34a. A portion 42 is provided.
The bearing portion 4 includes a lower support portion 41 and an upper support portion 42.
The lower support portion 41 includes two rollers 41a and 41a. The lower support portion 41 moves up and down by operating the lower screw shaft 41b, and the position can be adjusted.
The upper support portion 42 includes a single roller 42a, and moves up and down by operating the upper screw shaft 42b so that the position can be adjusted.
And the bearing part 4 supports the to-be-tested body K rotatably by the three rollers 41a, 41a, and 42a.

The leaf spring portion 35 is bent by a centrifugal force resulting from an unbalance during rotation of the DUT K, so that the holding portion 34 of the support frame 3 vibrates.
A sensor 71 that detects and measures the vibration of the support frame 3 is provided on the side surface of the support frame 3 in the vicinity of the leaf spring part 35 and the holding part 34.

  The rotation drive unit 5 includes a motor (not shown) that rotates the joint 51 connected to the device under test K, and transmits the rotational driving force of the motor to the device under test K via the joint 51.

The control unit 6 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like, and controls the rotation driving unit 5 and the measurement unit 7.
For example, the CPU in the control unit 6 operates the rotation drive unit 5 based on the test drive program stored in the ROM to rotate the device under test K supported on the support frame 3.
Further, the CPU in the control unit 6 activates the measuring unit 7 based on the rotating body measurement program stored in the ROM, and measures the balance state (unbalance amount) of the rotating test object K.
The test operation and measurement process in the balance testing machine 1 are the same as those conventionally known, and will not be described in detail here.

The measuring unit 7 measures the balance state (unbalance amount) of the device under test K based on, for example, data measured by the sensor 71 that detects vibration generated with the rotation of the device under test K.
The sensor 71 is, for example, a moving coil type pickup type vibration sensor including a pair of movable coils and a permanent magnet surrounding the core, and is generated in the movable coils in accordance with the vibration corresponding to the rotation of the test object K. The vibration of the support frame 3 is measured based on detecting a voltage proportional to the vibration speed. That is, since the voltage value detected by the sensor 71 changes according to the vibration of the support frame 3, by measuring the vibration of the support frame 3 due to the unbalance of the test object K by the change in the voltage value, It is possible to measure the unbalanced amount of the DUT K.
The sensor in the balance testing machine 1 is not limited to the sensor 71 described above, and may be, for example, an infrared sensor or a distance sensor, and any sensor suitable for measuring the test object K may be used. Good.

The pneumatic pump 8 is a pneumatic mechanism that sends out compressed air and sucks air. The pneumatic pump 8 is connected to an air pipe 82 that serves as a ventilation path and an air valve 83 that switches ventilation. Has been.
The pneumatic pump 8 sends air between the upper surface of the base 2 and the lower surface of the support frame 3 through the injection port 38 via the air pipe 82, and sucks air between the upper surface and the lower surface thereof. .
The supply and suction of air through the air pipe 82 by the pneumatic pump 8 can be switched by an air valve 83 that forms part of the pneumatic mechanism.

  Next, the operation | movement at the time of moving the support stand 3 on the base 2 in the balance testing machine 1 is demonstrated.

In the normal state in the balance testing machine 1, as shown in FIG. 3, the upper surface portion 21 of the base 2 and the lower surface portion 31 of the support base 3 come into contact with each other, and the upper surface of the upper surface portion 21 and the lower surface of the lower surface portion 31 are in contact with each other. The support frame 3 is placed on the base 2 in a contact state. Further, the support frame 3 is fixed to the base 2 by a support frame fixing screw 81 and the engaging portion 33.
In this way, the balance testing machine 1 performs a balance test of the DUT K while the support frame 3 is fixed to the base 2.

When the type of the test object K to be measured next changes, the support frame 3 is moved according to the size of the test object K, and the arrangement of the support frame 3 is adjusted.
First, by operating the pneumatic pump 8 in the air supply mode and opening the air valve 83, the pneumatic pump 8 supplies compressed air through the injection port 38 via the air pipe 82, and the upper surface portion 21 of the base 2. Compressed air is supplied between the lower surface 31 of the support frame 3.
Compressed air supplied between the upper surface portion 21 of the base 2 and the lower surface portion 31 of the support frame 3 is sent to the air chamber 31a, but cannot stay in the air chamber 31a, and the upper surface portion 21 and the lower surface portion 31 It flows so as to get out of the space.

As described above, when the compressed air supplied by the pneumatic pump 8 flows out between the upper surface portion 21 and the lower surface portion 31, the contact area between the upper surface of the upper surface portion 21 and the lower surface of the lower surface portion 31 is reduced. Therefore, the frictional force between the upper surface portion 21 of the base 2 and the lower surface portion 31 of the support frame 3 is reduced.
Further, by raising the output of the pneumatic pump 8 or the like and ejecting more highly compressed air into the air chamber 31a from the injection port 38, as shown in FIG. The upper surface of the upper surface portion 21 and the lower surface of the lower surface portion 31 can be separated so as to float, and the frictional force can be further reduced.

Then, the support base 3 in a state in which the friction force with the base 2 is reduced by, for example, the support base 3 being lifted from the base 2 by the compressed air supplied by the pneumatic pump 8 is light in weight. Therefore, the support frame 3 on the base 2 can be moved smoothly also by operating the handle 94 with a smaller force.
That is, the support frame 3 can be easily moved to a desired arrangement by an operation with a smaller force than in a conventional manual operation.

Next, after the support frame 3 is moved to a desired arrangement, the pneumatic pump 8 is stopped or the air valve 83 is closed to stop the supply of compressed air. As shown in FIG. The support frame 3 is placed thereon, and the upper surface of the upper surface portion 21 and the lower surface of the lower surface portion 31 are in contact with each other.
Here, by operating the pneumatic pump 8 in the intake mode and opening the air valve 83, when the pneumatic pump 8 sucks the air in the air chamber 31a through the injection port 38 via the air pipe 82, the air chamber 31a Is reduced, and the upper surface portion 21 of the base 2 and the lower surface portion 31 of the support frame 3 are brought into close contact with each other.
As described above, the support valve 3 can be kept fixed to the base 2 by closing the air valve 83 in a state where the pressure in the air chamber 31a is reduced and maintaining the negative pressure in the air chamber 31a. Become. That is, a mechanism for fixing the support frame 3 to the base 2 using the negative pressure generated by the pneumatic pump 8 can be configured.

As described above, in this balance testing machine 1, when the support frame 3 on the base 2 is moved and the arrangement of the support frame 3 is adjusted, the pneumatic pump 8 is operated to By supplying compressed air between the portion 21 and the lower surface portion 31 of the support frame 3, the frictional force between the upper surface portion 21 and the lower surface portion 31 can be reduced.
Further, the support frame 3 whose frictional force with the base 2 is reduced and the apparent weight is reduced can be smoothly moved on the base 2 even with a smaller force. Adjustment can be easily performed.
Further, not only is it easy to manually move the support gantry 3, but even a large support gantry 3 that has been difficult to move with a conventional moving mechanism using a motor as a drive source can be pneumatically operated. By using the compressed air in combination with the pump 8, it is possible to automatically adjust the arrangement of the support frame 3 by the motor-driven frame automatic feed mechanism.

  In addition, by operating the pneumatic pump 8 and sucking air between the upper surface portion 21 of the base 2 and the lower surface portion 31 of the support base 3, the support base 3 is easily fixed to the base 2. The balance test of the device under test K can be started quickly.

Therefore, according to the kind and size of the test object K, the arrangement of the support frame 3 can be quickly adjusted, and a balance test for various test objects K can be performed.
Thus, it can be said that the balance testing machine 1 according to the present invention is an apparatus capable of efficiently testing different types of test objects K.

  In the above embodiment, the support frame 3 does not have to be continuously lifted from the base 2 by the compressed air supplied by the pneumatic pump 8. At least a part of the support frame 3 may float or the support frame 3 may float intermittently to such an extent that the frictional force with the lower surface portion 31 is reduced.

  Further, when the support frame 3 on the base 2 is moved, the support frame fixing screw 81 may be loosened or tightened appropriately.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

1 Balance testing machine 2 Base 21 Upper surface (upper surface)
3 Support frame 31 Lower surface (lower surface)
31a Air chamber 38 Injection port 4 Bearing part 5 Rotation drive part 6 Control part 7 Measuring part 8 Pneumatic pump (pneumatic mechanism)
81 Support frame fixing screw 82 Air piping 83 Air valve 9 Movement mechanism K DUT

Claims (3)

A balance test comprising: a base; a support base that is movably mounted on the base and supports the object to be tested; and a rotation drive unit that rotates the test object supported by the support base. Machine,
A pneumatic mechanism is provided to reduce a contact area between the upper surface of the base and the lower surface of the support frame by supplying compressed air between the upper surface of the base and the lower surface of the support frame. Balance testing machine.   2. The balance testing machine according to claim 1, wherein the pneumatic mechanism separates the upper surface of the base and the lower surface of the support frame by ejecting compressed air. 3.   The pneumatic mechanism causes the upper surface of the base and the lower surface of the support frame to adhere to each other by sucking air between the upper surface of the base and the lower surface of the support frame. The balance testing machine according to 1 or 2.

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