KR0151505B1 - Transmission rotation damper - Google Patents

Abstract

The present invention relates to a variable speed rotation damper for shifting a shaft by varying braking force, wherein the first chamber (4) and the second chamber (7) are partitioned by a partition wall (2) having a female screw (3), A housing 1 in which an accommodation recess 8 is formed on the side of the second chamber 7 of the partition wall 2; A male screw 12 screwed into the female screw 3 and a projection 13 entering and exiting the receiving recess 8 are formed, and the latch is accommodated in the second chamber 7 at one end protruding from the housing 1. A shaft 11 on which a flange 14 and a flange 15 are formed; A cap 21 for sealing the first chamber 4; A first spring 31 installed between the cap 21 and the shaft 21; A rotor 41 accommodated in the second chamber with the shaft 11 inserted therein and having a fitting recess 42 in which the projection 13 is engaged / shipped; A second spring 52 loaded between the rotor 41 and the locking flange 14; A viscous fluid 61 filled in the housing 1; It is set as the structure provided with the O-ring 71 attached between the latching flange 14 and the flange 15, and sealingly sealing between the housing 1 and the shaft 11. As shown in FIG.

Description

Variable speed damper

1 is an exploded perspective view showing the components of a variable speed rotary damper according to an embodiment of the present invention.

(A), (b) is sectional drawing which cut | disconnected a part in the state which assembled each component of the shift rotation damper shown in FIG.

3 is an enlarged sectional view taken along the line A-A in FIG. 2 (b).

4 is a partial perspective view showing the outlet portion of the vending machine.

* Explanation of symbols for main parts of the drawings

1: housing 2: partition wall

3: Female thread 4: 1st room

5: recessed portion 6: annular groove

7: 2nd room 8: accommodating recessed part

9: jaw portion 11: shaft

12: external thread 13: protrusion

14: engaging flange 15: flange

16: engaging portion 21: cap

22: annular convex 23: engaging portion

31: first spring 41: rotor

42: fitting recess 51: second spring

61: silicone oil 71: O-ring

The present invention is used, for example, as an axis for rotatably supporting a door installed at an outlet of a vending machine, the speed of rotating in a direction in which the door closes to a predetermined opening state, and a speed of rotating in a direction of closing the door thereafter. It relates to a variable speed rotation damper that can be different.

Recently, many vending machines have been installed for the purpose of selling soft drinks. In addition, a door for maintaining the closed state in consideration of the sanitary surface and the like is provided at the outlet for discharging the product of the vending machine, and when the product is taken out, the door is opened to take out the product.

4 is a partial perspective view showing the extraction port portion of the vending machine.

In FIG. 4, S represents a vending machine, and the door D which can be opened and closed is provided in the outlet H which takes out goods. And the door D is supported so that the ejection opening H may be closed by the spring which is not shown in figure.

C represents a cup and contains a soft drink or the like.

Next, a method of taking out the cup from the outlet is described.

First, the door D in the closed state indicated by the solid line is gripped and opened to the open state indicated by the dashed-dotted line, resisting the holding force of the spring (not shown). Then, when the opening force of the door D is released, the door D returns to its original closed state by the holding force of the spring.

Therefore, while the door D is open, the hand C is held by the outlet H to hold the cup C, and then the cup C is removed from the outlet H by pulling the hand holding the cup C out of the outlet H. I can take it out.

However, since the door D is supported by the spring in the closing direction, the rotational speed at the initial closing speed is high, so that the door D is brought close to the closed state even before the cup C is removed from the outlet H. Or it may hit the cup C.

Therefore, there is a problem that the usability is bad because it is necessary to release and close the door D after removing the cup C with the other hand while keeping the door D open with one hand.

Here, it is also conceivable to install a rotary damper as the shaft of the door D to brake the rotational force for closing the door D. However, as a conventional rotary damper, the rotation speed of the door D in the early stage of closing is fast, and the door of the late closing door is used. There was a problem that the usability is also bad because the rotation speed of (D) is slow.

The present invention has been made to solve the above problems, it is to provide a variable speed rotation damper in which the shaft rotates by shifting the braking force.

First, the variable speed rotation damper according to the first invention is partitioned into a first chamber on the closed end side and a second chamber on the open end side by forming a partition wall having a female thread on the inner circumference in the axial middle of the inner circumference. A cylindrical housing in which a receiving recess is formed around the female screw on the second chamber side of the wall; A shaft having a male screw screwed into the female screw and an engaging portion coming in and out of the receiving recess in an axial middle of the outer shaft circumference, the one end protruding from the housing; A rotor accommodated in the second chamber while the shaft is fitted, and a engaging portion in which the engaging portion is engaged / stripped at the end of the engaging portion side; A viscous fluid filled in the housing; It is provided with an O-ring mounted on the open end of the housing to seal tightly between the housing and the shaft and to move the shaft.

In addition, the variable speed rotation damper according to the second invention is partitioned into the first chamber and the second chamber in the axial direction by forming a partition wall having a female thread on the inner circumference in the axial middle of the inner circumference, and the second chamber side of the partition wall. A cylindrical housing in which a receiving recess is formed around the female screw; A shaft having a male screw screwed into the female screw and an engaging portion to enter the receiving recess in an axial middle of the outer circumference, and having a locking flange accommodated in the second chamber at one end protruding from the housing; A cap sealingly sealing the open end of the first chamber; A first spring installed between the cap and the shaft and holding the shaft in a direction of the cap; A rotor accommodated in the second chamber with the shaft inserted therein and having a locking portion at which an engagement portion is engaged / shipped at an end of the engagement portion side; A second spring loaded between the rotor and the engaging flange and holding the rotor against a partition wall; A viscous fluid filled in the housing; It is attached to the open end of the housing located at one end side of the shaft rather than the locking flange, and has an O-ring for tightly sealing the housing and the shaft and movably supporting the shaft.

In the variable speed rotation damper of the present invention, when the male screw is screwed into the female screw and the engaging portion protruding from the recess is engaged with the engaging portion, the shaft is rotated to be inserted into the housing, whereby the engaging portion is completely inserted into the receiving recess. The rotor also rotates until it enters, that is, until the engagement of the engagement portion and the engagement portion is released.

Therefore, when the engaging portion is engaged with the engaging portion and the rotor rotates, the control force to the shaft increases, and when the engaging portion is peeled off the engaging portion and the rotor does not rotate, the control force to the shaft becomes small.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described based on drawing.

1 is an exploded perspective view showing the components of the variable speed rotary damper according to an embodiment of the present invention, and (a) and (b) of FIG. 2 are a part of the components of the variable speed rotary damper shown in FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 (b). In addition, (a) of FIG. 2 shows the state in which a door is closed, and (b) of FIG. 2 shows the state in which a door is open.

In the figure, 1 denotes a cylindrical housing molded from synthetic resin, and a partition wall 2 is formed in the axial direction in the inner circumference of the housing 1, and the partition wall 2 is formed inside the housing. It is partitioned into the 1st chamber 4 and the 2nd chamber 7 in an axial direction. A female screw 3 is formed in the inner circumference of the partition wall 2 having the same center as the inner circumference of the housing 1.

5 denotes a concave portion formed at a diameter larger than the diameter of the first chamber 4 at the open end of the first chamber 4, and an annular groove 6 is formed in the inner circumference thereof.

8 represents an accommodating recess and is formed centering on the female screw 3 toward the second chamber 7 side of the partition wall 2 partitioning the first chamber 4 and the second chamber 7, and a shaft to be described later. It is the part which the processus | protrusion 13 of (11) enters and exits. In addition, the depth of the accommodation recess 8 is deeper than the height of the projection 13.

9 represents the jaw portion of the second chamber 7 and is a portion where the rotor 41 to be described later abuts.

11 denotes a shaft formed of synthetic resin, and the male screw 12 which is screwed with the female screw 3 of the housing 1 is formed in the axial direction in the outer periphery, and the hook which enters into the receiving recess 8 is formed. The projection 13 as the fitting portion is formed at intervals of 90 degrees, and the engaging flange 14 and the flange 15 accommodated in the second chamber 7 are formed at one end side protruding from the housing 1, and the other end thereof. The engaging portion 16 to which the 1st spring 31 mentioned later is engaged is formed in the following. In addition, one end portion protruding from the housing 1 of the shaft 11 has a rectangular cross-sectional shape, for example.

21 shows a cap formed of a synthetic resin fitted to the recess 5 of the housing 1, and tightly seals the open end of the first chamber 4, thereby fitting the annular groove 6 An engaging portion 23 is formed in which the annular convex portion 22 and the first spring 31 are engaged.

31 represents a first spring, and is installed between the engaging portion 16 of the shaft 11 and the engaging portion 23 of the cap 21 to support the shaft 11 in the direction of the cap 21.

41 denotes a rotor formed into a cylindrical shape made of synthetic resin, and is accommodated in the second chamber 7 of the housing 1 with the shaft 11 fitted therein, and a protrusion facing the protrusion 13. (13) The fitting recesses 42 serving as the engaging portions to which the projections 13 are engaged / released are formed at intervals of 90 degrees on the inner periphery of the side end portions.

51 denotes the second spring, and is loaded between the engaging flange 14 of the shaft 11 and the rotor 41 to hold the rotor 41 against the jaw portion 9 of the housing 1.

61 denotes silicone oil as a viscous fluid filled in the first and second chambers 4, 7 of the housing 1.

71 represents an O-ring, which is loaded between the latching flange 14 of the shaft 11 and the flange 15 to seal tightly between the housing 1 and the shaft 11. It supports the shaft 11 to be movable.

The following describes an example of assembly.

First, the O-ring 71 is loaded between the engaging flange 14 of the shaft 11 and the flange 15. Subsequently, the second spring 51 and the rotor 41 are inserted into the shaft 11 sequentially at the engaging portion 16 side of the shaft 11.

Then, one end of the first spring 31 is engaged with the locking portion 16, and then the locking portion 16 side of the shaft 11 is inserted into the second chamber 7 of the housing 1 so that the female screw 3 Screw the male screw (12) in the Subsequently, the other end of the first spring 31 is withdrawn from the housing 1 to be engaged with the locking portion 23 of the cap 21, and the silicone oil 61 is filled in the first chamber 4. The annular convex portion 22 is fitted into the annular groove 6 by inserting the 21 into the concave portion 5.

Then, the rotor 41 is rotated in the direction of protruding from the housing 1 to release the screwing of the male screw 12 and the female screw 3, and then the locking flange 14 is positioned outside the housing 1. After pulling out the shaft 11 to the state, filling the second chamber 7 with the silicone oil 61, inserting the shaft 11 into the housing 1 again, and the male screw 12 is female threaded (3). If it is screwed on, it is assembled as shown in (a) and (b) of FIG.

The following describes the operation.

Prior to the description, the variable speed rotation damper of the present embodiment is used as the rotation axis of the door D shown in FIG. 4, and it is assumed that the housing 1 is attached to the vending machine S at the left side of the door D. .

First, when the door D is opened in the closed state of the door D shown in Fig. 2A, the shaft 11 rotates in the direction of the arrow X to move in the direction protruding from the housing 1. At the same time, the projection 13 also moves while rotating in a direction protruding from the receiving recess 8 so that the projection 13 abuts on the rotor 41.

And when the protrusion 13 protrudes while rotating in the accommodating recessed part 8, while the protrusion 13 resists the holding force of the 2nd spring 51, the rotor 41 moves a little in the axial direction, and the rotor 41 ), But a slight gap occurs between the jaw portion 9 and the jaw portion 9, but as shown in (b) of FIG. 2, the protrusions 13 are immediately fitted into the fitting recesses 42 and engaged with the rotor 41. Is brought into contact with the jaw portion 9 by the holding force of the second spring 51 to rotate together with the shaft 11, i.e., to the open state of the door D shown in FIG.

Then, when the rotational force for rotating the shaft 11 in the direction of the arrow X in the open state of the door D shown in FIG. 2 (b) is released, the holding force of the first and second springs 31 and 51 is achieved. Alternatively, when the shaft 11 rotates in the direction of the arrow Y due to the gripping force of a spring (not shown), the shaft 11 starts to fit into the housing 1, and at this time, the protrusion 13 is fitted with a fitting recess ( The rotor 41 rotates together with the shaft 11 while the fitting is engaged with the shaft 42, and the projection 13 is released from the fitting recess 42 and completely enters the receiving recess 8. Only 11 will rotate. Therefore, the door D shown in Fig. 2A is closed.

When the shaft 11 rotates in this manner, the shear resistance of the silicone oil 61 acts only on the surface of the shaft 11, so that the braking force for braking the rotational force for rotating the shaft 11 is small. ) And the rotor 41 rotate together, the shear resistance of the silicone oil 61 also acts on the surface of the rotor 41, the braking force for braking the rotational force for rotating the shaft 11 is increased.

As described above, according to one embodiment of the present invention, since the shaft 11 is configured to rotate alone or together with the rotor 41 within the rotation range of the shaft 11, only the shaft 11 is used. In the case of rotation, the shear resistance of the silicone oil 61 acts only on the surface of the shaft 11, so that the braking force for braking the rotational force for rotating the shaft 11 is small, but the shaft 11 and the rotor 41 rotate together. In this case, the shear resistance of the silicone oil 61 also acts on the surface of the rotor 41 to increase the braking force for braking the rotational force for rotating the shaft 11.

Therefore, if the range in which the braking force is increased is set to the predetermined closed state where the cup C is taken out of the outlet H in the open state of the door D, the door (from the open state of the door D to the predetermined closed state) Since D) closes slowly and the door D is closed at a normal speed thereafter, the door D does not collide with the cup C or the hand to be taken out from the outlet H and the convenience of use is improved. .

And since the 1st spring 31 was provided between the shaft 11 and the cap 21, the rotating body of the door D etc. was set by setting the holding force of this 1st spring 31 to moderate strength. There is no need for a holding member such as a spring for holding the finger in a predetermined direction, for example, in the closing direction.

In addition, since the second spring 51 is loaded between the shaft 11 and the rotor 41, the braking force can be reliably changed by fitting the projection 13 to the fitting recess 42 to engage. Can be.

In the present embodiment, the closed end side of the housing 1, that is, the cap 21 side has been described as an upper side, and the open end side of the housing 1 has been described as an example of use. By installing in a horizontal direction as a rotating shaft and setting the range in which a braking force becomes large in the late stage when a cover is closed, it can prevent that a cover closes rapidly and hits a toilet bowl.

In addition, although the shaft 11 is hardly wound in the direction in which the shaft 11 is wound into the housing 1 by the first spring 31, the closed end side of the housing 1 is lowered and the open end side of the housing 1 is lowered. If it is set to the upper side, since the shaft 11 can be wound into the housing 1 by the weight of the rotating body, the first spring 31 can be omitted according to the use state.

In addition, although the rotor 41 has been described as an example of being hardened by the second spring 51 to abut on the jaw portion 9, the closed end side of the housing 1 is lowered and the open end side of the housing 1 is upward. When the rotor 41 is brought into contact with the jaw portion 9 by its own weight, and the projection 13 is fitted into the fitting recess 42 to engage, thereby controlling the rotational force for rotating the rotor 41. Since the large braking force acts, the second spring 51 can be omitted depending on the commercial state.

The silicone oil 61 is described as an example of a viscous fluid, but may be other viscous fluid.

As described above, according to the present invention, since the shaft is configured to rotate alone or together with the rotor within the rotation range of the shaft, when only the shaft rotates, the shear resistance of the viscous fluid acts only on the surface of the shaft. As a result, the braking force for braking the rotational force for rotating the shaft is small. However, when the shaft and the rotor rotate together, the shear resistance of the viscous fluid also acts on the surface of the rotor to increase the braking force for braking the rotational force for rotating the shaft.

Therefore, if the range in which the braking force is increased is set from, for example, the door open state in the vending machine to the predetermined closed state where the cup is taken out of the outlet, the door closes slowly from the open state to the predetermined closed state, and then Since the door is closed at a normal speed, the door does not collide with the cup or the hand to be taken out from the outlet, and the convenience of use is improved.

Since the first spring is provided between the shaft and the cap, by setting the holding force of the first spring to an appropriate strength, a spring for holding a rotating body such as a door in a predetermined direction, for example, a closing direction, or the like. There is no need for a support member.

In addition, since the second spring is loaded between the shaft and the rotor, the braking force can be reliably changed by engaging the protrusions securely by engaging the fitting recesses.

Claims (2)

By forming the partition wall with the female thread on the inner circumference in the axial middle of the inner circumference, the interior is partitioned into a first chamber on the closed end side and a second chamber on the open end side, and the partition is centered on the female thread on the second chamber side of the wall. A cylindrical housing having a receiving recess formed therein; A shaft having a male screw screwed into the female screw and an engaging portion coming in and out of the receiving recess in an axial middle of the outer axis, the one end protruding from the housing; A rotor which is accommodated in the second chamber with the shaft fitted and formed with a engaging portion in which the engaging portion is engaged / peeled off at the end of the engaging portion side; A viscous fluid filled in the housing; An O-ring mounted on an open end of the housing to tightly seal between the housing and the shaft and to support the shaft to be movable, wherein the engaging portion is engaged with the engaging portion, And when the shaft is rotated to be inserted into the housing, the rotor also rotates together until the engagement between the engaging portion and the engaging portion is released. The inner partition is formed into a first chamber and a second chamber in the axial direction by forming a partition wall having a female thread on the inner circumference in the axial middle of the inner circumference, and an accommodating recess centered on the female thread on the second chamber side of the partition wall. A cylindrical housing formed; A shaft having a male screw screwed into the female screw and an engaging portion coming in and out of the receiving recess in an axial middle of the outer circumference, and having a locking flange accommodated in the second chamber at one end protruding from the housing; A cap sealingly sealing the open end of the first chamber; A first spring disposed between the cap and the shaft, the first spring holding the shaft in the direction of the cap; A rotor which is accommodated in the second chamber with the shaft inserted, and has a engaging portion at which the engaging portion is engaged and peeled at an end portion of the engaging portion side; A second spring loaded between the rotor and the latching flange and holding the rotor against the partition wall; A viscous fluid filled in the housing; It is attached to an open end of the housing located at one end side of the shaft rather than the locking flange, and tightly seals the space between the housing and the shaft, and includes an O-ring for supporting the shaft to be movable. When the shaft is rotated to be fitted into the housing while the fitting portion is engaged with the locking portion, the rotor also rotates together until the engagement between the locking portion and the locking portion is released. Variable speed rotary damper.