JPS59102135A - Vibration testing machine - Google Patents

Abstract

PURPOSE:To reduce an installing space and to perform stable vibration application, by providing a unitary body of a cylinder and a vibrating table in a vibration applying machine, fixing a piston to a base, and providing a guide cylinder for supporting a weight and for keeping a horizontal attitude on the opposite side of the vibration applying machine. CONSTITUTION:The main body of a vibration applying machine comprises a cylinder 2, which is attached to a vibrating table 1 as a unitary body, a piston 3, which is slidably provided in the cylinder 2, and the like. Both ends of the piston 3 are fixed to a base 7. A guide cylinder 4, which has a sildable rod 5 in the inside, is provided at the opposite side of the vibration applying machine. When pressure oil, whose direction and flow rate are controlled, is supplied to the cylinder 2 through a servo valve 6, the cylinder 2 is moved back and forth, and the vibrating table 1 is driven and vibrated. In this constitution, the length of the axial direction can be shortened and the providing space can be made small. Since the weight is supported and the horizontal attitude is kept by the guide cylinder 4, the stable vibration application is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a relatively small one-dimensional vibration testing machine.

[Prior art]

In order to reduce the installation space, conventional vibration testing machines fixedly support both piston rod ends of the vibration actuator, supported the vibration actuator body movably relative to the piston, and installed a A device equipped with a vibrating table has been proposed. This has already been proposed by the present applicant in Japanese Patent Laid-Open No. 56-16837.

However, in this vibration testing machine, the twisting of the vibration table,
It does not have a mechanism with a degree of freedom that can tolerate deviations in parallelism and dimensional changes due to temperature, such as a horizontal holding function.

[Purpose of the invention]

The present invention has been made based on the above-mentioned problems, and an object of the present invention is to provide a vibration testing machine that not only requires a small installation space but also has an appropriate leveling function.

[Summary of the invention]

The present invention is characterized in that, in a vibration testing machine consisting of a vibrator, the cylinder of the vibrator is integrated with the vibration table, the piston is fixed to the base, and the vibration table is horizontally mounted on the opposite side of the vibrator. A guide cylinder is provided to hold the vibration table and support the weight of the specimen at the same time, and the guide cylinder has a self-alignment that can tolerate twisting of the vibration table, deviation in parallelism, and dimensional changes due to temperature. be.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5, the vibration exciter main body includes a cylinder 2 integrally attached to a vibration table 1, a piston 3 slidably provided in the cylinder 2, a hydrostatic bearing 12, a cover 11, etc. It consists of

Both ends of the piston 3 of this vibrator are fixed to a base 7. Therefore, the cylinder 2 can move in the axial direction relative to the piston 3. The oil chamber within the cylinder communicates through a passage provided in the piston 3 with a servo valve 6 attached to the end of the piston.

The guide cylinder section includes a guide cylinder 4 attached under the vibration table 1, a rod 5 slidably provided inside the cylinder 4, and a guide cylinder section provided between the rod 5 and the cylinder 4, so that it can slide on the circumference of the rod. The static pressure pad 9 and the static pressure pad 9 provided in
It consists of a cylinder 4, a spherical seat 8 attached to the vibration table 1, and the like. The static pressure pad 9 and the spherical seat 8 can move in the axial direction together with the vibration table 1 and the cylinder 4. Further, the static pressure pad 9 and the spherical seat 8 are slidable and have a degree of freedom that allows the guide cylinder 4 to move not parallel to the rod 5.

Next, the operation of the vibration testing machine of the present invention described above will be explained.

The pressure oil is alternately supplied to the oil chamber in the cylinder 2 through a pipe in the piston, with its flow rate controlled by the servo valve 6 in the opposite direction. Therefore, the cylinder 2 can reciprocate and vibrate the vibration table 1.

The weight of the vibration table is supported and horizontally maintained by a guide cylinder 4 and a rod 5. If the guide cylinder 4 moves not parallel to the axis of the rod 5, the hydrostatic pad 9
The mechanism is such that the spherical seat 80 and the spherical seat 80 slide, and no force is generated between the rod and the cylinder.

〔Effect of the invention〕

As described in detail above, according to the vibration testing machine of the present invention, the length in the axial direction can be shortened, so that the installation space can be reduced.

In addition, a guide cylinder for supporting the weight of the vibration table and keeping it horizontal is installed on the opposite side of the vibration exciter, making it possible to provide a vibration testing machine that can perform stable vibrations with a single vibration exciter and servo valve. I can do it. Furthermore, since a support device for the vibration table is not required, the equipment can be made smaller and cheaper.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the configuration of the vibration tester, Fig. 2 is a side view thereof, Fig. 3 is a diagram showing the A-A cross section in Fig. 1, and Fig. 4 is a diagram showing the configuration of the vibration tester.
The figure shows the B-B cross section, and Fig. 5 shows the C-B cross section in Fig. 3.
It is a figure showing a C section. 1... Vibration table, 2... Cylinder, 3... Piston, 4... Guide cylinder, 5... Rod, 6...
Servo valve, 7... pace, 8... spherical seat, 10...
・Cover, 11...F Fig. 1 Fig. 2 Foil 3 Fig. O Atsushi 5 Fig.

Claims (1)

[Claims] In a vibration testing machine consisting of a vibration table on which a specimen is loaded and a hydraulic vibration exciter that excites the vibration table, the cylinder of the vibration exciter is integrated with the vibration table, the piston is fixed to the base, and the vibration exciter A vibration testing machine characterized in that a guide cylinder is provided on the opposite side of the vibration table to maintain the horizontality of the vibration table and at the same time support the weight of the specimen.