JPH0723636Y2 - Position control anti-vibration support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a position control / vibration support device, and more particularly, to a position control / vibration support device that effectively blocks the vibration of a diesel engine or the like from propagating to the hull or the like. is there.

[Prior art]

A soft vibration-proof support such as a rubber vibration isolator or an air spring is used as a means for reducing the propagation of vibrations generated by an engine mounted on a ship, automobile, train, aircraft, or other transportation device to the transportation device itself. Then, for example, when the hull sways, displacement occurs between the engine and the hull due to the inertial force of the engine, and the thrust force from the propeller pushes the engine forward. As a result, the propeller does not turn,
Since the life of the flexible joint of the shaft and the pipe will be shortened, the rigidity of the support structure cannot be lowered so much,
Therefore, a large anti-vibration effect cannot be obtained.

Also, in trains and the like, anti-vibration rubber, air springs, etc. are used as means for blocking the propagation of vibrations from the dolly to the passenger compartment. There is a problem that the rigidity cannot be lowered and the effect is small.

As a means for solving this problem, the same displacement as the displacement of the elastic body is generated in the opposite direction to the actuator arranged in series therewith, so that the displacement between the vibration-isolated object and the vibration source is kept constant and A position control anti-vibration support device having a structure with a large vibration effect was considered.

As this position control anti-vibration support device, as shown in FIG. 4, an elastic body 2 such as an anti-vibration rubber or an air spring is arranged on a support base 1, a piston 3 is attached to the elastic body 2, and the piston 3 3 is inserted into a cylinder 5 attached to a supported object 4 which is an installation table for equipment, and the vibration of the supported object 4 is provided between the supported object 4 and the support table 1. The displacement detector 6 detects this signal and guides the signal to a servo valve 8 via a low-pass filter 7. The servo valve 8 is controlled and a hydraulic pressure from a hydraulic source (not shown) is applied to the inside of the cylinder 5 to support the supported object 4 The relative position between the support 1 and the support base 1 is kept constant. In the case of a train, the support base 1 serves as a passenger compartment and the supported object 4 serves as a carriage.

By the way, such a position control anti-vibration supporting device has the following problems.

That is, although the vibration of the supported object 4 has an amplitude in the vertical direction from the intended design point, it can sufficiently cope with a downward force, that is, the elastic body 2 side, but with respect to an upward force, this elastic force is applied. Body 2
Can not handle because the tension is small. Especially when the elastic body 2 is an air spring, the tendency is large.

Therefore, this device can be used only when the elastic body 2 is strongly compressed, and when it is necessary to generate both the upper and lower forces, the same device as that shown in FIG. Since it is necessary to mount them in opposite directions, there is a problem that the device becomes large and expensive.

[Purpose of device]

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to move an elastic body used in a position control anti-vibration support device such that an object to be supported moves upward. In order to reduce the size and cost of the device, it is necessary to make it work.

[Outline of device]

In order to achieve the above-mentioned object, the present invention installs an actuator on a supported body arranged in parallel with a predetermined distance from a supporting base, and arranges the actuator between the supporting base and the supported body. In a position control anti-vibration support device adapted to generate the same displacement as the displacement of the elastic body in the opposite direction, a cylindrical frame is attached to the piston rod of the actuator, and both ends of a support plate inserted into the frame are attached. Is fixed to the support base, further, an air spring is arranged in one of the voids of the frame body partitioned by the support plate, and an independent air spring that does not communicate with the air spring is provided in the other one of the voids. It is characterized by being arranged.

〔Example〕

An embodiment of the active vibration isolating support device according to the present invention will be described below with reference to FIGS. 10 is a top plate 11 and a bottom plate
A frame body composed of a side plate 13 and a side plate 13 and having two side surfaces 14 opened, and a piston rod 16 having a piston 15 at the top is attached to the upper plate 11 of the frame body 10, and the frame is A support plate 17 is arranged in the center of the body 10 and air springs 18a and 18b are arranged above and below the support plate 17, respectively. Both ends of the support plate 17 are attached to the support base 19. 20 is a supported object, and the cylinder is attached to the supported object 20.
21 is attached via a support piece 22. A displacement detector 23 is provided so as to detect the amount of displacement between the support base 19 and the supported object 20. Further, 24 is a low-pass filter, and 25 is a servo valve for controlling the actuator 26.

[Operation of anti-vibration device]

(Normal) In the above structure, as shown in Fig. 3-a, the piston 15 and the air spring 18 of the actuator 26 are in normal use.
The positions a and 18b are at the intermediate positions, and in this case, the displacement detector 23 does not output a signal.

(When a downward external force acts) In such a state, as shown in FIG. 3-b, when a downward force Fd due to inertial force acts on the supported object 20, the piston 15 moves downward together with the frame body 10. To do. At this time, a compressive force acts on the upper air spring 18a and the displacement detector 23 detects the amount of displacement between the supported object 20 and the support 19, and the actuator 26 is driven based on this signal, and the force F Is transmitted by the compressive force of the upper air spring 18a, so that the relative position is kept constant.

(When an upward external force acts) On the other hand, when an upward external force Fu acts on the supported object 20 as shown in FIG. 3-c, the compressive force of the lower air spring 18b and the displacement detector 23 The signal actuates the actuator 26, and its force F is transmitted by the compressive force of the lower air spring 18b to keep the relative position constant.

[Effect of device]

As is apparent from the above description, the present invention provides an actuator installed on a supported body arranged side by side with a predetermined distance from the supporting base, and the elastic body disposed on the actuator between the supporting base and the supported body. In a position control anti-vibration support device adapted to generate the same displacement as the body displacement in opposite directions, a cylindrical frame is attached to the piston rod of the actuator, and both ends of a support plate inserted into the frame are The air spring is fixed to a support base, and further, an air spring is arranged in one space of the frame body partitioned by the support plate, and an independent air spring which is not communicated with the air spring is arranged in the other space. Therefore, even if an external force above the predetermined point acts on the supported object 20, the external force can be counteracted by the compressive force of the air spring, and two opposing position control anti-vibration supporting devices as in the prior art. To It is not necessary to add an effect that the apparatus can be downsized.

[Brief description of drawings]

1 to 3-a to 3c show an embodiment of an active vibration isolating support device according to the present invention, wherein FIG. 1 is a side view of a main part of the active vibration isolating device, and FIG. Is a front view of the same. FIG. 3 is a diagram for explaining the operation, and FIG. 3A is a normal state, and FIG.
The figure shows (c) when a downward external force is applied to the supported object.
The figures respectively show cases where an upward external force is applied to the supported object. FIG. 4 is a side view of a conventional position control anti-vibration support device, and FIG. 5 is a mounting state diagram of the conventional position control anti-vibration support device. 1,19 ... Support base, 2 ... Elastic body, 3,15 ... Piston, 4,20 ... Supported object, 5,21 ... Cylinder, 6,23 ... Displacement detector, 7,24 ... Low pass filter, 8,25 … Servo valve, 21… Actuator, 10,14… Frame, 11… Top plate, 12… Bottom plate, 13… Side plate, 1
6 ... Piston rod, 17 ... Support plate, 18a, 18b ... Air spring,
22 ... Support piece.

Claims (1)

[Scope of utility model registration request] 1. An actuator is installed on a supported body arranged in parallel with a predetermined distance from a supporting base, and the actuator is provided with the same displacement as that of an elastic body arranged between the supporting base and the supported body. In a position control anti-vibration support device that is designed to generate in the opposite direction, a tubular frame (10) is attached to the piston rod (16) of the actuator (26),
Both ends of a support plate (17) inserted in the frame body (10) are fixed to the support base (19), and further, in one space of the frame body (10) partitioned by the support plate (17). Air spring (18
a) and place the air spring (18a) in the other one
Position control anti-vibration support device characterized by arranging an independent air spring (18b) that does not communicate with.