JPH08101059A - Driver for rolling guide oscillation and acoustic measurement - Google Patents

Abstract

PURPOSE: To prevent the generation of variation of measurement values with time by converting the rotational power of a motor into linear driving power through a slide screw and transmitting the linear driving power to a bearing block through a resilient pad having low rigidity thereby eliminating the effect of the mass and the rigidity of a driver to the natural frequency of a rolling guide. CONSTITUTION: Rotational motion of a motor 1 is transmitted through a coupling 2 to the threaded shaft 3a of a slide screw 3 and converted into linear motion of a nut 3b screwed to the shaft 3a. The linear motion is then transmitted through a bracket 5, an arm and a pusher 8 secured to the nut 3b and a low rigidity resilient pad 9 bonded to the pusher 8 to the bearing block 10a of a rolling guide 10 to be measured thus driving the block 10a in the axial direction at a constant speed. Since the block 10a comes into contact with only the low rigidity pad 9, the mass and rigidity of a driver give no effect to the natural frequency of the rolling guide 10. Furthermore, since the driving speed of the block 10a is kept constant, instantaneous drift in the measurements of oscillation and sound caused by the driver are substantially eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for driving a rolling guide bearing block in measuring vibration and sound generated when a rolling guide bearing block is driven.

[0002]

2. Description of the Related Art Vibration and acoustic measurement of rolling guides is a means for obtaining basic data for research and theoretical analysis of rolling guides. Especially, the driving method in this measurement is directly measured. Since it influences the result, the researchers spend a lot of effort in monitoring the driving state during measurement and checking the fluctuation. Regarding a drive device for vibration / acoustic measurement of rolling guide, conventionally, a motor, a pulley, a belt, a disc, a connecting rod and a plate are used.
As shown in FIG. 3, the rotational force generated by the motor 21 is transmitted to the disc 24 via the pulley 22 and the belt 23, and this rotational force is converted into a linear force by the connecting rod 25 and the plate 26, and the rotational force is converted. The method of driving the bearing block 27a of the measurement rolling guide 27 has been taken.

That is, the bearing block 27a of the rolling guide 27 is driven by a slider crank mechanism composed of a motor 21, a pulley 22, a belt 23, a disc 24, a connecting rod 25, a plate 26, and a rolling guide 27 for measurement. It was

However, since the mass and rigidity of the plate 26 have a great influence on the natural frequency of the rolling guide, and the driving speed of the bearing block 27a is not constant, vibration and
There is a problem that the vibration / sound cannot be actually measured because the measured value of the sound changes drastically within the driving time.

An object of the present invention is to solve these conventional problems so that the mass and rigidity of the driving device do not affect the natural frequency of the rolling guide, and the driving device can measure the vibration and acoustic values. It is intended to avoid inducing temporal fluctuations.

[0006]

The gist of the present invention will be described with reference to the accompanying drawings.

In a device for driving the bearing block 10a when measuring vibration and sound of the rolling guide 10 when the bearing block is driven, a motor 1, a coupling 2 for transmitting a rotational force generated by the motor 1, and The rotational force is converted into a linear driving force by a screw shaft 3a to which the rotational force of the motor 1 is transmitted via the coupling 2 and a nut 3b screwed to the screw shaft 3a and moving along the screw shaft 3a. Sliding screw 3 and screw shaft 3 of this sliding screw 3
Support bearing 4 for supporting a and nut 3 of slide screw 3
a bracket 5 fixed to b, a slide guide 6 that supports the bracket 5, a pusher 8 that transmits a driving force to the bearing block 10a, an arm 7 that connects the pusher 8 and the bracket 5, and a pad 9 of an elastic material with low rigidity. The rotary force generated by the motor 1 is converted into a linear drive force by the slide screw 3, and the linear guide force is added to the bearing block 10a of the rolling guide 10 via the pad 9 made of a low-rigid elastic material.
The present invention relates to a rolling guide vibration / acoustic measurement drive device characterized by driving the bearing block 10a at a constant linear velocity.

[0008]

[Operation] The bearing block 10a of the rolling guide 10 is driven to measure vibration and sound when the bearing block 10a is driven.

In the present invention, the rotational force generated by the motor 1 is transmitted to the slide screw 3 via the coupling 2, and the screw shaft 3a of the slide screw 3 is pivotally supported by the support bearing 4 to rotate and rotate on the screw shaft 3a. The screwed nut 3b moves. That is, the rotational force of the motor 1 is converted into a linear driving force.
The bracket 5 moves along the slide guide 6 together with the nut 3b, and the bearing block is passed through the arm 7, the pusher 8 and the pad 9 made of a low-rigidity elastic material (for example, rubber).
10a moves along the rail 10b. This rolling guide 10
The vibration / sound such as the movement of the bearing block 10a is measured.

[0010]

1 and 2 show an embodiment of the present invention.

In this embodiment shown in FIG. 1, reference numeral 1 in the drawing
Is a motor, 2 is a coupling for transmitting the rotational force generated by the motor, 3 is a sliding screw, 3a is its screw shaft, 3b is a nut, 4 is a support bearing, 5 is a bracket, 6
Is a slide guide, 7 is an arm, 8 is a pusher, 9 is a pad of a low-rigidity elastic material (for example, rubber), 10 is a rolling guide for vibration or acoustic measurement, 10a is its bearing block, and 10b is a rail.

Now, when the axial movement amount of the nut 3b when the screw shaft 3a of the sliding screw 3 is rotated once with respect to the nut 3b of the sliding screw, that is, the lead is L (mm), the sliding screw 3
Of the rotation speed n (rpm) given from the motor 1 via the coupling 2 to the screw shaft 3a of
in) = n × L linear motion. Then, this linear movement is transmitted to the bearing block 10a of the rolling guide 10 through the bracket 5, the arm 7, the pusher 8 and the pad 9 of the elastic material of low rigidity. That is, the bearing block 10a is axially driven at a constant linear velocity v (mm / min).

The pad 9 made of a low-rigidity elastic material (for example, rubber) has one surface adhered to the pusher 8 and is arranged so as to sandwich the bearing block 10a of the rolling guide 10 with a gap. It is configured to come into contact only with a low-rigidity elastic material. Therefore,
When the pusher 8 moves in the axial direction (the direction from right to left is shown in the figure), the linear driving force is applied to the elastic material of low rigidity via the pad 9 and the bearing block of the rolling guide 10 to be measured. The bearing block 10a is driven by being applied to the end face of 10a.

The sliding screw nut 3b made of a PPS resin composition is used, and the sliding screw 3 is lubricated with grease, for example, to reduce the time change of the vibration and sound measurement values. As a result, the true value of the device according to the present invention can be more clearly demonstrated, and more accurate and stable measurement of vibration and sound becomes possible.

[0015]

As described above, according to the device of the present invention, (1) the mass and rigidity of the driving device have almost no influence on the natural frequency of the rolling guide.

(2) Since the rotational force is converted into the driving force by the sliding screw, the driving speed of the bearing block can be kept constant, and the time-dependent change of the measured values of vibration and sound due to the driving device. rare.

Therefore, the vibration / acoustic measurement accuracy can be greatly improved as compared with the conventional case.

Further, there is an effect that no skill is required for setting the device for the rolling guide to be measured.

[Brief description of drawings]

FIG. 1 is a schematic configuration front view of the present embodiment.

FIG. 2 is a schematic configuration sectional view of the present embodiment.

FIG. 3 is a schematic configuration explanatory view of a conventional rolling guide vibration / sound measurement drive device.

[Explanation of symbols]

 1 Motor 2 Coupling 3 Sliding Screw 3a Screw Shaft 3b Nut 4 Support Bearing 5 Bracket 6 Sliding Guide 7 Arm 8 Pusher 9 Pad 10 Rolling Guide 10a Bearing Block

Claims (1)

[Claims] 1. A device for driving a bearing block when measuring vibration and sound when a bearing block of a rolling guide is driven, comprising a motor, a coupling for transmitting a rotational force generated by the motor, and the coupling. A sliding screw that consists of a screw shaft to which the rotational force of the motor is transmitted through and a nut that is screwed to the screw shaft and moves along the screw shaft, and that converts the rotational force into a linear driving force. Support bearings to support the screw shaft, brackets that are fixed to the nuts of the sliding screws, slide guides that support the brackets, pushers that transmit the driving force to the bearing blocks, arms that connect the pushers and the brackets, and low rigidity elasticity. With a pad of material, the rotational force generated by the motor is converted into a linear driving force by a sliding screw,
A rolling guide vibration / acoustic measurement drive device characterized in that the bearing block is driven at a constant linear velocity in addition to a rolling guide bearing block through a pad of a low-rigidity elastic material.