JPH05180239A - Damping device for high torque - Google Patents

Abstract

PURPOSE:To facilitate assembly 'by making it possible to discharge air in chambers from a blow hole through a valve when loading viscous fluid in the chamber formed between a rotor in which a contact section contacting the cylindrical wall face of a casing and the stopper projected in the cylindrical wall face of the casing. CONSTITUTION:A rotor 4 having a small diameter shaft section 16 and a large diameter section 17 is contained in the hollow cylindrical chamber 1 of the casing fixed to a stationary side member, and the small diameter shaft section 16 is detachably received by the projection section formed on the closed end section of the casing 2, and the large diameter shaft section 17 is detachably received by the cylindrical wall face of the opening side of the casing 2. At the two positions opposing to the diametral direction of the small diameter shaft section 16 of the rotor 4, a sliding contact section 3 in sliding contact with the cylindrical wall face of the chamber 1 is axially provided, and at two positions opposing to the radial direction of the inner cylindrical wall face of the chamber 1, a stopper 7 is projectedly provided, and between the stopper 7 and contact section 3, two chambers filled with viscous fluid V. The air in each chamber is discharged from a blow hole 5 while pushingly opening a valve 6 when viscous fluid is loaded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high torque damper device which exhibits a high torque damping action.

[0002]

2. Description of the Related Art For example, a lid, a door and other opening / closing members which can be opened and closed up and down are provided with a shock absorbing device in order to prevent sudden opening and closing. A conventional device is found, for example, in Japanese Utility Model Publication No. 59-26051.
This has a supporting arm type structure having a piston mechanism, and compresses and buffers air by an impact force.
Therefore, an extra vacant space for mounting the arm is indispensable, and there is a definite disadvantage in mounting in a narrow area or a small size. A door check (closer) is used for the door, but this also requires a considerable size.

In view of the above points, the present inventor has a compact shape and a simple structure that can be attached to a narrow portion in order to alleviate the rotational force about the axis, and a high damping torque can be easily achieved. We have developed a damper that can be used and have already applied.

[0004]

SUMMARY OF THE INVENTION The present invention improves the work efficiency by shortening the time required for assembling the high torque damper device described above and further enabling automatic assembly. The task was to do.

[0005]

In order to solve the above-mentioned problems, the present invention has a casing having a chamber 1 having a cylindrical shape, one end of which is closed in the axial direction and the other end of which is open. Two
And a sliding contact portion 3 that is in sliding contact with the cylindrical wall surface of the chamber 1,
For a high torque, which is provided with a rotor 4 rotatable about an axis, and in which a rotation torque is set by a resistance generated when the viscous fluid filled in the chamber moves from the front side to the rear side in the rotation direction of the sliding contact portion 3. Regarding the damper device, pores 5 are formed in the casing 2 for allowing the viscous fluid and the air trapped inside when the rotor 4 is incorporated into the chamber 1 to be formed, and the pores 5 are closed from the outside and pushed by the pressure from the room. The means is provided with a valve 6 which is openable and spring-biased.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings.

The casing 2 has a hollow cylindrical chamber 1.
One end of the chamber 1 in the cylinder axis direction is closed, and the other end is open. A projecting portion 10a forming the internal bearing 10 is provided at the closed end in the direction of the cylindrical axis.

The rotor 4 is incorporated in the chamber 1 and is rotatable relative to the casing 2, and has a small-diameter shaft portion 16 for providing a space between the rotor 4 and the cylindrical wall surface of the chamber 1.
And a large diameter shaft portion 17 supported by a cylindrical wall surface. The end surface of the small-diameter shaft portion 16 is provided with a concave portion 10b that rotatably engages with the protruding portion 10a to form the internal bearing 10. The outer peripheral surface of the large-diameter shaft portion 17 is the inner peripheral surface of the chamber 1. The outer bearing 11 is formed in contact with the surface.

A circumferential groove 18 is formed on the sliding contact surface of the external bearing 11, that is, the outer peripheral surface of the large-diameter shaft portion 17 in the illustrated example, and a seal member 12 composed of a 0-ring or the like is mounted therein. Therefore, the viscous fluid filled in the room is prevented from leaking.

A sliding contact portion 3 which is in sliding contact with the cylindrical wall surface of the chamber 1 is provided in the axial direction of the small diameter shaft portion 16 of the rotor 4. The sliding contact portion 3 includes a base portion 19 protruding in the axial direction of the small diameter shaft portion 16.
And a sliding contact piece 20 having a substantially U-shaped cross-section, which is arranged so as to straddle it and which is in liquid-tight contact with the cylindrical wall surface, and a fluid passage 21 is formed in each of the base portion 19 and the sliding contact piece 20. Has been done.

The slide contact portions 3 including the base portion 19 and the slide contact pieces 20 are provided at two locations on the rotor small diameter shaft portion 16 at equal intervals in the circumferential direction. Reference numeral 22 denotes a circumferential shallow groove formed in the small-diameter shaft portion 16, the tip of which reaches the base portion 19. Reference numeral 23 is an axial guide groove formed in the large-diameter shaft portion 17, and is provided close to the base portion 19.

Since the sliding piece 20 is in liquid-tight contact with the inner wall surface of the chamber 1 and rotates in liquid-tight contact with the rotation of the rotor 4, the viscous fluid V filled in the chamber 1 is It is movable through the fluid passage 21.

In order to keep the rotation angle of the rotor 4 within a certain range, a stopper 7 that engages with the sliding contact portion 3 and stops the rotor 4 is formed by projecting on the cylindrical wall surface of the chamber 1, and this projection is utilized. Then, when the rotor 4 is incorporated into the chamber 1, air that is about to be contained inside is released, and pores 5 for completely filling the viscous fluid V into the chamber 1 are provided in the casing 2.

The pores 5 are opened on the outer end surface of the stopper 7 so that the air and the viscous fluid V pushed out from the interior of the chamber 1 can easily come out. This portion faces the guide groove 23 when the sliding contact portion 3 of the rotor 4 is applied to the stopper 7.
The stopper 7 is elongated in the axial direction of the cylinder, reaches the inner wall of the chamber 1, has a trapezoidal cross section, and is designed so that air is unlikely to remain and viscous fluid is easily filled in every corner.

A valve 6 is provided to close the pores 5. The valve 6 has a spherical shape and is biased by a coiled spring 8 in a direction of closing the pore 5. This spherical valve 6
In order to mount the spring 8 and the stopper 24 for stopping them, the valve mounting portion 9 having the pore 5 inside and using the protruding shape of the stopper 7 as a recess from the outside of the casing is formed on the outside of the casing 2. ing. Reference numeral 25 is a sealing means between the valve mounting portion 9 and the stopper 24, and O-rings are used.

The rotor 4 is housed in the chamber 1 up to the large-diameter shaft portion 17, and is fixed to the casing 2 by the fixing member 15 so as not to slip out in the housed state. The fixing member 15
Is formed in an annular shape having an insertion hole 26 that contacts the outer end surface of the rotor large-diameter shaft portion 17 and projects the connecting shaft portion 14 of the rotor 4 outward. Reference numeral 27 is a stopper of the fixing member 15, and 28 and 29 are a plurality of stopper mounting holes provided in the fixing member 15 and the casing 2, respectively.

A fixed piece 13 is integrally formed on the casing 2 as a means for mounting the damper device of the present invention, and a connection port 30 for transmitting a rotational torque to the connection shaft portion 14 is formed on the rotor 4. Has been formed. In addition,
The casing 2 and the rotor 4 can be manufactured by resin molding.

The damper device according to the present invention thus constructed is assembled as shown in FIGS.

That is, first, the chamber 1 of the casing 2 is filled with a sufficient amount of the viscous fluid V, and then the rotor 4 together with the sliding contact portion 3 is inserted into the chamber 1. At this time, the shaft portion 1 of the rotor 4
Air between 6, 17 and the cylindrical wall surface of the casing 2 escapes from the pores 5 to the outside, and in its place, the viscous fluid V fills the space. The viscous fluid is filled more than the space volume in order to eliminate the remaining air, and as a result, the excess viscous fluid V ′ is pushed out from the pores 5.

After that, the spherical valve 6 and the spring 8 are inserted from the mounting portion 9 following the pores 5, and the stopper 2 is inserted through the sealing means 25.
When 4 is screwed into the mouth of the mounting portion 9 (FIG. 3), the pores 5 are closed by the spherical valve 6, and the assembly of the damper is completed (FIG. 4).

The operating state of the damper device is shown in FIGS. 5 and 6, and when the rotor 4 relatively rotates in the direction of the notch-shaped passage 21, the fluid flows between the base portion 19 and the sliding contact piece 20. Since the rotor 4 rotates smoothly through the gap while receiving resistance from the front side to the rear side in the rotation direction, the rotor 4 rotates smoothly, but in the reverse rotation, the resistance increases, so that a large damping torque is generated.

[0022]

Since the present invention is constructed and operates as described above, the damper device for high torque can be easily performed by filling the viscous fluid and inserting the rotor 4, and by inserting the rotor 4, the viscous fluid can be obtained. Expels air from the pores 5,
Since the inside of the chamber 1 is filled, air does not remain and the performance can be stabilized.

Further, according to the present invention, the time for assembling the damper device can be shortened, and the necessary work can be performed in order. Since no special skill is required, the work efficiency can be improved and the automatic assembly can be performed. is there.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a damper device according to the present invention.

FIG. 2 is a sectional view of the same device before assembly.

FIG. 3 is a sectional view of the same as above during assembly.

FIG. 4 is a sectional view of the same as above after assembly.

FIG. 5 (a) is an operation explanatory view of the above. (B) Operation explanatory drawing same as the above.

FIG. 6 (a) is an operation explanatory view of the above. (B) Operation explanatory drawing same as the above.

FIG. 7 is a vertical sectional view of the same.

Claims (7)

[Claims] 1. A casing 2 in which a chamber 1 is formed, which has a cylindrical shape, one end portion in the axial direction of the cylinder is closed, and the other end portion is open, and a sliding contact portion that slidably contacts a cylindrical wall surface of the chamber 1. 3 is provided, which is rotatable about an axis, and the rotational torque is generated by the resistance generated when the viscous fluid filled in the chamber moves from the front side to the rear side in the rotation direction of the sliding contact portion 3. A high torque damper device to be set, wherein a porosity 5 is formed in a casing 2 for letting out the viscous fluid and air trapped inside when the rotor 4 is installed in a chamber 1, and the porosity 5 is closed from the outside. Also, a high torque damper device is provided with a spring-biased valve 6 capable of being pushed open by pressure from the room. 2. A stopper 7 that engages with the sliding contact portion 3 of the rotor 4 and stops the rotation of the rotor 4 is formed so as to project on the cylindrical wall surface of the chamber 1 in order to make the rotation range of the rotor 4 constant. The high torque damper device according to claim 1. 3. The high torque damper device according to claim 2, wherein the pores 5 are formed on an outer end surface of the stopper 7 of the casing 2. 4. The damper device for high torque according to claim 1, wherein the valve 6 is a spherical valve, and is housed in a mounting portion 9 formed in the casing 2 together with a spring 8 for pressing the valve 6 against the pores 5. 5. An internal bearing 10 for rotatably rotatably supporting the rotor 4 is provided on the closed end surface of the chamber 1 located on the axis of the cylinder and on the end surface of the rotor 4 in contact with the closed end surface, so that the chamber 1 can be opened. The high-torque use according to claim 1, wherein the outer bearing 11 between the inner peripheral surface of the other end and the outer peripheral surface of the rotor 4 in contact therewith is provided with a seal member 12 for preventing leakage of viscous fluid. Damper device. 6. The casing 2 has a fixing piece 13 for fixing the casing 2 on the outside, and the rotor 4 is provided with a connecting shaft portion 14 projecting axially outward from the external bearing 11. The high torque damper device described. 7. The damper device for high torque according to claim 5, wherein an annular fixing member 15 is fixed to the casing 2 for attaching the rotor 4 to the casing 2 so as not to slip out at the outer bearing 11.