JPH0339680Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hydraulic flexible support device that can fix the positions of two arms, etc. at any angle using hydraulic pressure.

More specifically, the present invention relates to a hydraulic swivel support device in which an oil reducing member such as a rod having an appropriate volume is inserted into a chamber in order to reduce the amount of oil for transmitting hydraulic pressure.

(Prior Art) A conventional hydraulic universal support device is shown in FIG. Its function is to fix the hydraulic flexible support device to a fixing member (not shown) using a fixing screw 116, and to attach the ball joint 114,
122 and the rotation ring 108 which is rotatably fitted on the cylinder unit 100, the first
The positions of the arm 110 and the second arm 118 are arbitrarily set, and the ball joint 122 attached to the tip of the second arm 118 is moved, and the supporting device is attached to the fixture 1.
26, set it at any position, and turn the handle 1
06, the plunger 104 applies pressure to the oil inside the cylinder 102 and the chambers 112, 120, and the ball joints 114, 122, the first arm 110, the second arm 118, and the rotation ring 108
This is to fix the position of.

(Problems to be Solved by the Invention) However, the above-described hydraulic universal support device has the following problems.

Although the cylinder and both chambers are filled with oil, the volume of the oil decreases due to temperature changes, especially when the temperature in the operating environment decreases.

When the oil shrinks, even if you pressurize the oil and fix the position of the arm before shrinking, the oil pressure will drop, the ball joints and rotation rings will loosen, and the initial setting posture of the equipment fixed to the device will change. There are problems in that the equipment sometimes falls over and breaks down.

In addition, the handle is designed to apply hydraulic pressure, but when rotating the handle to tighten the ball joint or rotating ring with hydraulic pressure, if there is a large amount of oil, it is difficult to transmit the degree of tightening to the handle. As the number increases, the handle is turned with excessive pressure until it reaches the tightest position. The oil pressure is over 200 atm when the handle is at its tightest position, so there is a problem that over long periods of use, the seals and joints will receive excessive force and become fatigued.

Therefore, the purpose of this invention is to provide a hydraulic swivel support device that is not susceptible to changes in oil volume even when the temperature changes, can be operated with one touch when hydraulic pressure is applied, and has a responsive handle. do.

(Means for Solving the Problems) In order to solve the above problems, the present invention has the following configuration.

That is, a cylinder unit forming a cylinder is provided, at least one of which is rotatably fixed to the cylinder unit, first and second arms each having a chamber connected to the cylinder inside are provided, and the cylinder and the chamber are connected to each other. In the hydraulic flexible support device, a plunger is provided to increase or decrease the pressure of oil, and the plunger applies pressure to fix the first and second arms, etc. at arbitrary angles. The present invention is characterized in that an oil reducing member such as a rod is disposed within the chamber.

(effect) The operation will be explained with reference to the drawings.

By arranging the rods 27, 37 in the chambers 26, 36, the cylinder 12, the chambers 26, 36
Rod 2, which is an oil reducing member, reduces the amount of oil filled in the
It can be reduced by the volume of 7.37.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration will be explained with reference to FIG. 1.

Reference numeral 10 denotes a cylinder unit, in which a cylinder 12 is formed at the center, and a plunger 14 is slidably disposed within the cylinder 12.

A handle 16 is screwed onto the end of the cylinder unit 10 in order to push one end of the plunger 14 and apply hydraulic pressure. The handle 16 may be rotated in a predetermined direction when pressing the plunger 14.

20 is a rotation ring, and the cylinder unit 1
The cylinder unit 10 is rotatably fitted on the cylinder unit 10.
is in contact with the sliding surface 21.

A coupler 22 is screwed onto the cylinder unit 10 to prevent the rotary ring 20 from coming off the cylinder unit 10.

24 is the first arm, and the chamber 26 is in the center.
is formed, and one end is connected to the cylinder unit 10.
The chamber 26 and the cylinder 12 are connected to each other while being screwed onto the outer periphery. A ball joint 28 serving as a fixing part is formed at the other end, and a fixture 32 for fixing the device to a fixing member (not shown) is formed on the crown ball 30.
is fixed. 34 is a second arm, a chamber 36 is formed in the center, one end is screwed to the outer periphery of the rotation ring 20, and the chamber 36 is formed at the center.
6 and the cylinder 12 are communicated via a rotation ring 20. The other end has a ball joint 44 that serves as a support.
is formed, and a fixture 46 for attaching a supporting instrument is fixed to the crown ball 31.

Rods 27 and 37 are oil reducing members, and are loosely inserted into chambers 26 and 36 provided on the first and second arms 24 and 34, respectively.

Next, the operation will be explained.

When the handle 16 is rotated in the tightening direction to fix the entire device, pressure is applied to the oil and the handle 1
The pressure applied from 6 is transmitted from cylinder 12 to chambers 26, 36 of first and second arms 24, 34 via oil.

Chambers 26, 36 within chambers 26, 36
Pressure is applied to the ball joints 28, 44 through the oil filled in the clearance between the inner wall of the ball joints 28, 44 and the rods 27, 37.
Since pressure can be transmitted to the pressing bodies 48, 50 of the ball joints 28, 44, the crown balls 30, 31 of the ball joints 28, 44 can be fixed at arbitrary angles.

Various preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments; for example, the end of the rod may be fixed to the pressing body of the ball joint. Of course, many more modifications can be made without departing from the spirit of the invention.

(Effect of the invention) When the hydraulic flexible support device according to the invention is used,
Since the amount of oil in the device is small, even if the oil volume decreases due to a drop in temperature, the absolute amount of decrease in the overall oil amount is small, so it is possible to minimize the decrease in tightening force. It becomes possible.

In addition, since the amount of oil is small, it is possible to operate the handle with one touch, and the handle has a feeling of tightening when tightening, which prevents over-tightening and extends the life of the device. Effective.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a hydraulic universal support device according to the present invention, and FIG. 2 is a front sectional view of a conventional hydraulic universal support device. 10...Cylinder unit, 12...Cylinder, 14...Plunger, 16...Handle, 2
0... Rotating ring, 24... First arm, 26...
Chamber, 27... Rod, 28... Ball joint, 3
4...second arm, 36...chamber, 37...rod, 44...ball joint.

Claims (1)

[Scope of utility model registration request] A cylinder unit forming a cylinder is provided,
First and second arms are provided, at least one of which is rotatably fixed to the cylinder unit, each having a chamber connected to the cylinder therein, and a plunger is provided for pressurizing and depressurizing the oil in the cylinder and the chamber; In a hydraulic flexible support device that fixes the first and second arms, etc. at any angle by applying pressure from a plunger, an oil reducing member such as a rod is installed in the cylinder and the chamber to reduce the amount of oil in the chamber. A hydraulic flexible support device characterized by having.