KR101146073B1 - Rotary damper - Google Patents

Abstract

(Task) Obtain a rotary damper capable of gradually changing the torque generated on the rotary shaft.
(Solution means) An inner circumferential step step 64 and an inner circumferential step step 66 formed on the inner circumferential surface 58 of the housing 30 partition the large clearance part 60 and the small clearance part 62, and the inner circumferential surface step 64. Is inclined toward the bottom plate 68 of the housing 30. By this structure, when the rotor 42 is rotated, the opposing area where the opposing portion 48 and the small clearance portion 62 oppose gradually increases. Thus, when the inner peripheral surface step | step 64 is inclined and the rotor 42 rotates, the torque which the rotation shaft member 44 produces will be increased by gradually increasing the opposing area which the opposing part 48 and the small clearance part 62 oppose. Can increase (change) slowly.

Description

Rotary Damper {ROTARY DAMPER}

The present invention relates to a rotary damper for braking the braking object by the viscous resistance of the viscous fluid.

The rotary damper described in Patent Literature 1 includes a housing filled with a viscous fluid, a rotating shaft in which a part is inserted into the housing, an annular plate fixed to the rotating shaft, and an annular plate fixed to the housing. It is.

And the uneven | corrugated shape is formed in the surface of the annular plate fixed to the rotating shaft and the annular plate fixed to the housing, When rotating a rotating shaft, the positional relationship of the uneven shape formed in the surface of the annular plate of both sides changes, Viscous resistance changes due to viscous fluid. Thus, the braking object attached to the rotating shaft is controlled by changing the viscosity resistance of the viscous fluid received by the rotating shaft.

Patent Document 1: Japanese Patent Application Laid-Open No. 8-166033

However, the uneven shape of the surface of the annular plate is formed by forming a step on the surface of the annular plate. Therefore, the viscous resistance of the viscous fluid received by the rotating shaft changes rapidly. That is, since the torque which arises in a rotating shaft changes rapidly, it can be considered that the operation | movement of the braking object attached to a rotating shaft changes rapidly.

This invention is made | formed in view of the said fact, and makes it a subject to gradually change the torque which arises in a rotating shaft.

The rotary damper according to claim 1 of the present invention comprises: a housing filled with a viscous fluid; A rotor rotatably received in the housing, the rotor for transmitting rotational force from a rotating shaft member protruding to the outside; An opposing portion formed in the rotor and opposing an inner circumferential surface of the housing; When the rotor is rotated, a large clearance portion for increasing the clearance between the opposing portion and the housing and a small clearance portion for reducing the clearance between the opposing portion and the housing than the large clearance portion are formed, and when the rotor is rotated, And a partition portion partitioning the opposing portion or the housing such that the opposing area where the opposing portion and the small clearance portion oppose gradually changes.

According to the above configuration, a rotor through which the rotational force is transmitted from the rotating shaft member protruding to the outside is disposed in the housing filled with the viscous fluid. Moreover, the opposing part formed in the rotor opposes the inner peripheral surface of the housing. Moreover, when a partition part rotates a rotor, the opposing part or housing is partitioned so that the opposing area which opposes an opposing part and a small clearance part may change gradually.

As a result, when the small clearance portion gradually increases when the rotor is rotated, the viscous resistance of the viscous fluid generated between the opposing portion and the housing gradually increases, so that the torque generated on the rotating shaft member gradually increases.

On the other hand, when the small clearance portion gradually decreases when the rotor is rotated, the viscous resistance of the viscous fluid generated between the opposing portion and the housing gradually decreases, so that the torque generated on the rotating shaft member gradually decreases.

Thus, the torque which arises in a rotating shaft member can be changed gradually.

The rotary damper according to claim 2 of the present invention is the inner peripheral surface step of forming the small clearance portion formed in the inner peripheral surface according to claim 1.

According to the above configuration, a clearance portion having a small inner peripheral surface step formed on the inner peripheral surface of the housing is formed.

In this way, the small clearance portion can be easily formed by forming the inner peripheral surface step on the inner peripheral surface of the housing.

In the rotary damper according to claim 3 of the present invention, the small clearance portion is formed in a rib facing the inner circumferential surface of the opposing portion that protrudes from the bottom plate of the housing and rotates, and the partition portion is formed in the rib. It is a rib inclination or rib step which forms the said small clearance part.

According to the above configuration, the rib inclination or the rib step forms a small clearance portion formed in the rib protruding from the bottom plate of the housing.

In this way, the small clearance portion can be easily formed by forming the rib inclination or the rib rib.

In the rotary damper according to claim 4 of the present invention, in the inner circumferential surface of the housing, a stepped surface protruding inward is formed, and the partition portion is inclined or opposed to an opposite portion formed in the opposite portion where a small clearance portion is formed. It is a negative step.

According to the above configuration, the stepped surface protrudes inward from the inner peripheral surface of the housing. And the small inclination part in which the inclination part or the opposing part level | step difference formed in the opposing part is formed in the opposing part is formed.

In this way, the small clearance portion can be easily formed by forming the opposite portion inclined portion or the opposite portion step portion in the opposite portion.

In the rotary damper according to claim 5 of the present invention, in the second step, the inner peripheral surface step is inclined toward the bottom plate of the housing.

According to the above configuration, the inner peripheral surface step is inclined toward the bottom plate of the housing. Thus, by making the inner peripheral surface step incline, the opposing area where the opposing part and the small clearance part oppose can be gradually changed.

The rotary damper according to claim 6 of the present invention is one of claims 1 to 5, wherein the opposing area with the opposing portion is gradually decreased so that the operation of the braking object attached to the rotary shaft member is gradually slowed from the start of operation. The small clearance is formed to increase.

According to the above-described configuration, the motion of the braking object attached to the rotating shaft member is slowed down slowly but quickly at the start of operation. For example, when the cover of the cup holder of a vehicle is used as a braking object, the opening operation of the cover can be slowed down in this manner to achieve a high texture opening operation.

According to this invention, the torque which arises in a rotating shaft can be changed gradually.

1 is an exploded perspective view showing a rotary damper according to a first embodiment of the present invention.
2 is a perspective view showing a housing employed in the rotary damper according to the first embodiment of the present invention.
3 (A) (B) is a perspective view showing a rotor employed in the rotary damper according to the first embodiment of the present invention.
4 is a perspective view showing a rotary damper according to the first embodiment of the present invention.
5 is a cross-sectional view showing a rotary damper according to the first embodiment of the present invention.
6A, 6B, and 6C are operation diagrams showing the operation of the rotary damper according to the first embodiment of the present invention.
7A, 7B, and 7C are operation diagrams showing the operation of the rotary damper according to the first embodiment of the present invention.
8 is a cross-sectional view showing a rotary damper according to the first embodiment of the present invention.
9 is a diagram showing the performance of generated torque of a rotary damper according to the first embodiment of the present invention.
10A and 10B are views showing the performance of generated torque of the rotary damper according to the first embodiment of the present invention.
11 is a perspective view showing a cup holder employing a rotary damper according to the first embodiment of the present invention.
12 is a perspective view showing a cup holder employing a rotary damper according to the first embodiment of the present invention.
13 is an exploded perspective view showing a rotary damper according to a second embodiment of the present invention.
14 is a perspective view showing a housing employed in the rotary damper according to the third embodiment of the present invention.
15 is an exploded perspective view showing a rotary damper according to a fourth embodiment of the present invention.
16 is an exploded perspective view showing a rotary damper according to a fifth embodiment of the present invention.

<< first embodiment >>

The cup holder which employ | adopted an example of the rotary damper which concerns on 1st Embodiment of this invention is demonstrated based on FIGS.

<Overall construction>

As shown in FIG. 12, the cup holder 12 employing the rotary damper 10 is disposed in front of the shift lever 16 in the lower portion of the center console 14 of the automobile, and holds the cup. The top holding part 18 and the cover member 20 which cover the said holding part 18 are comprised.

As shown in FIG. 11, the lid member 20 of the cup holder 12 is openable and the rotary damper 10 is attached to the rotary shaft 24 of the lid member 20. As shown in FIG. In addition, a rotary spring 24 is provided with a finger spring (not shown) for holding the cover member 20 in the open direction to open the cover member 20.

In addition, the cover member 20 is engaged with the holder main body 22 by an engaging member (not shown) in a closed state covering the holding portion 18, and pressing the release button (not shown), the holder main body The engagement with (22) is released and is opened by the holding force of the finger spring.

That is, the cover member 20 opened by the finger force of the finger spring is configured to open while the torque generated by the rotary damper 10 is added.

<Main part constitution>

Next, the rotary damper 10 will be described.

As shown in FIG. 1, FIG. 5, and FIG. 8, the rotary damper 10 is equipped with the housing 30 in which the viscous fluid 34 was filled. The housing 30 has a substantially closed tube cylindrical shape, and a pair of fixing pieces 32 protrude from the outer circumferential surface of the housing 30, and a circular attachment hole 32A is formed in the fixing piece 32. .

In addition, a cylindrical end portion 36 protrudes into the housing 30 at the shaft center portion of the bottom plate 68 of the housing 30, and at the central portion of the end portion 36, the end portion thereof. A fixed shaft 38 having a diameter smaller than 36 is projected. The rotor 42 accommodated in the housing 30 can be supported by the fixed shaft 38.

As shown in FIG. 1 and FIG. 3, the rotor 42 is comprised including the rotating shaft member 44 and the disk-shaped base part 46 to which the base end part of the said rotating shaft member 44 is attached. have. In addition, a pair of opposing portions 48 are formed at an edge portion of the pedestal portion 46 and extends in a direction opposite to the protruding direction of the rotating shaft member 44 to face the inner circumferential surface 58 of the housing 30. . Further, inside the opposing portion 48, a pair of arc-shaped plate members 50 protrude from the pedestal portion 46 at a predetermined distance.

In addition, the pedestal portion 46 is formed with a recessed insertion recess 28 (see FIG. 5) into which the fixed shaft 38 formed in the housing 30 is inserted, and fixed to the insertion recess 28. By inserting the shaft 38, the rotor 42 is rotatably supported relative to the housing 30.

On the other hand, the housing 30 filled with the viscous fluid 34 is closed by a disc shaped cover member 52. The external dimensions of the cover member 52 are the same as the external dimensions of the housing 30. As shown in FIG. 5, the end of the housing 30 and the rear surface of the cover member 52 are ultrasonically welded to each other so that the cover member ( 52 is fixed to the housing 30.

Moreover, the through-hole 54 which penetrates the front and back is formed in the shaft center part of the said cover member 52, and the rotating shaft member 44 is able to penetrate (refer FIG. 4). In addition, a sealing ring 56 can be mounted between the cover member 52 and the pedestal 46, and the viscous fluid 34 in the housing 30 is sealed while the housing 30 is sealed. (54) prevents leakage.

As shown in FIG. 2 and FIG. 8, the inner circumferential surface 58 of the housing 30 has a large clearance portion 60 for increasing the clearance with the opposing portion 48 when the rotor 42 is rotated, and the large clearance. Small clearance parts 62 which make clearance with the opposing part 48 smaller than the part 60 are formed so as to oppose the rotation shaft member 44 of the rotor 42, respectively.

Specifically, the inner circumferential surface step 64 formed on the inner circumferential surface 58 of the housing 30 and the inner circumferential surface step 66 partition the large clearance part 60 and the small clearance part 62, and the inner circumferential surface step 64. Is inclined toward the bottom plate 68 of the housing 30, and the inner circumferential surface step 66 is formed perpendicular to the bottom plate 68.

By the above-described configuration, as shown in Figs. 6A, 6B, and 7A, 7B, and 7C, when the rotor 42 is rotated, the counter portion 48 When the inner circumference gradually increases the opposing area that the small clearance portion 62 faces, the step clearance 64 divides the large clearance portion 60 and the small clearance portion 62.

In addition, as shown in FIG. 8, at the rotation start position of the rotor 42, the end edge 48A of the opposing part 48 on the rotation direction (arrow A direction) side does not oppose the small clearance part 62. As shown in FIG. {See FIG. 7 (A)}.

When the rotor 42 is rotated in the direction of the arrow A, the opposing portion 48 does not oppose the small clearance portion 62 in the section B (rotation angle 5 °) at the start of rotation of the rotor 42. The viscous resistance that the opposing part 48 receives from the viscous fluid 34 is small, and becomes a "low torque zone." Also, in the C section (rotation angle 60 °) after the B section, the area of the opposing portion 48 and the small clearance portion 62 gradually increases, so that the opposing portion 48 receives the viscous fluid 34 from the viscous fluid 34. The resistance gradually increases, and is in the "west torque zone". In the D section (rotation angle 25 °) after the C section, since the opposing portion 48 and the small clearance portion 62 have a large area of opposition, the viscous resistance that the opposing portion 48 receives from the viscous fluid 34 is increased. It is large and has a "high torque zone".

That is, when the rotor 42 starts to rotate, the torque generated by the rotating shaft member 44 is low, and then the torque gradually increases to reach the high torque region.

<Action, effect>

As shown in FIG. 11, in the cup holder 12 with the rotary damper 10, when the user releases the engagement member which is not shown in order to open the cover member 20 in the closed state, the cover member 20 ) Starts to rotate in the open direction by the force of the finger spring.

In this case, since the rotary damper 10 sequentially changes to the low torque zone, the west side torque zone, and the high torque zone, the opening operation of the lid member 20 is slow at the beginning of the opening operation, but gradually slows down.

Here, the inventor of this application produced the rotation damper 10, and evaluated the torque which arises in the rotating shaft member 44 of the rotor 42. As shown in FIG.

In the graph of FIG. 9, the horizontal axis represents the rotation angle [°], and the vertical axis represents the generated torque [N · cm]. As can be seen from this graph, it can be seen that the torque increased sharply at the start of the operation, and the torque gradually increased at each rotational speed (5 rpm, 15 rpm, 30 rpm).

FIG. 10 (A) shows actual data when the rotor speed is 15 rpm when the rotor is rotated in the forward rotation direction. FIG. 10 (B) shows rotation speed when the rotor is rotated in the reverse direction. Actual data are shown. As can be seen from the comparison between Fig. 10 (A) and Fig. 10 (B), when the motor rotates in the forward rotation direction, the torque gradually increases, and when the motor rotates in the reverse rotation direction, the torque does not increase gradually. It can be seen that the increase.

Thus, when the inner peripheral surface step | step 64 is inclined and the rotor 42 is rotated, the torque which arose in the rotating shaft member 44 by gradually increasing the opposing area which the opposing part 48 and the small clearance part 62 oppose. Can be increased (changed) slowly.

In addition, the small clearance portion 62 can be easily formed by forming the inner circumferential surface step 64 on the inner circumferential surface 58 of the housing 30.

In addition, the inner peripheral surface step 64 is inclined toward the bottom plate 68 of the housing 30 so that the facing area between the opposing portion 48 and the small clearance portion 62 can be gradually increased (changed).

Moreover, since the small clearance part 62 opposes the opposing part 48 in the radial direction of the rotating shaft member 44 of the rotor 42, attachment of the rotor 42 is compared with the case where it opposes in the axial direction. Even if the position shifts in the axial direction, the performance of gradually changing the torque can be prevented from changing greatly.

In addition, since the rotary damper 10 of the present invention can rotate 360 degrees, the torque can be changed anywhere in 360 degrees by appropriately setting the small clearance portion 62.

In addition, the opening operation of the lid member 20 of the cup holder 12 with the rotary damper 10 is fast but gradually slows down at the start of the opening operation, and thus becomes a 'quick start slow end' and has a high texture opening. The operation can be realized.

In addition, although this invention was demonstrated in detail about specific embodiment, this invention is not limited to said embodiment, It is clear for those skilled in the art that various other embodiment is possible within the scope of this invention. For example, in the above embodiment, the inner circumferential surface step 64 is formed in a straight shape, but may be curved or the like in accordance with the target performance of the braking object to be attached.

In addition, in the above-mentioned embodiment, when the rotor 42 is rotated, the opposing area that the opposing portion 48 and the small clearance portion 62 oppose gradually increases, but may be decreased gradually depending on the target performance.

<< 2nd embodiment >>

Subsequently, the rotary damper according to the second embodiment of the present invention will be described with reference to FIG. 13. In addition, about the member same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 13, unlike the 1st Embodiment mentioned above, the bottom plate 84 of the housing | casing 82 of the rotary damper 80 which concerns on this 2nd Embodiment of The rib 86 facing the inner circumferential surface is protruded. Two ribs 86 are formed so as to face each other around the rotation shaft member 44 of the rotor 42, and the outer peripheral surface of the ribs 86 is a small clearance portion 88. In addition, one edge of the rib 86 is a rib inclination 90 that inclines toward the bottom plate 84.

Thus, by forming the rib inclination 90, the small clearance part 88 which the area | region which opposes the opposing part 48 changes gradually can be formed.

<< third embodiment >>

Subsequently, the rotary damper according to the third embodiment of the present invention will be described with reference to FIG. 14. In addition, about the member same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 14, unlike the first embodiment described above, the bottom plate 104 of the housing 102 of the rotary damper 100 according to the third embodiment has a structure in which the counter portion 48 that rotates is rotated. The rib 106 facing the inner circumferential surface is protruded. Two ribs 106 are formed so as to oppose each other around the rotation shaft member 44 of the rotor 42, and the outer peripheral surface of the ribs 106 is a small clearance portion 108. Further, at one edge of the small clearance portion 108, a rib step 110 inclined toward the bottom plate 104 is formed.

In this way, by forming the rib step 110, the small clearance portion 108 in which the opposing area with the opposing portion 48 gradually changes can be formed.

<< 4th embodiment >>

Subsequently, the rotary damper according to the fourth embodiment of the present invention will be described with reference to FIG. 15. In addition, about the member same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 15, the step surface 126 which protrudes inward is formed in the inner peripheral surface 124 of the housing 122 of the rotary damper 120 which concerns on this 4th Embodiment. In addition, one edge of the opposing portion 130 of the rotor 42 is an opposing inclined portion 132 inclined toward the bottom plate 128 of the housing 122, and the clearance of the outer peripheral surface of the opposing portion 130 is small. It is a part 134.

In this way, the small clearance portion 134 in which the opposing area with the step surface 126 gradually changes by forming the opposite portion inclination 132 can be formed.

<< 5th embodiment >>

Subsequently, the rotary damper according to the fifth embodiment of the present invention will be described with reference to FIG. 16. In addition, about the member same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 16, the step surface 146 which protrudes inward is formed in the inner peripheral surface 144 of the housing 142 of the rotary damper 140 which concerns on 5th Embodiment. In addition, the opposing portion 150 of the rotor 42 is provided with an opposing portion step 152 which is inclined toward the bottom plate 148 of the housing 142, and the opposing portion step 152 is formed by the opposing portion step 152. A small clearance portion 154 is formed on the outer circumferential surface of the 150.

Thus, by forming the opposing-step step 152, the small clearance part 154 in which the opposing area with the step surface 146 changes gradually can be formed.

In addition, although this invention was demonstrated in detail about specific embodiment, it is clear for those skilled in the art that this invention is not limited to the above-mentioned embodiment, and other various embodiments are possible within the scope of this invention. For example, the desired performance may be obtained by combining the small clearance portions of the embodiments.

10-Rotary damper 20-Cover member (braking object)
30-housing 34-viscous fluid
42-rotor 44-shaft member
48-Opposing part 58-Inner circumference
60-large clearance 62-small clearance
64-Inner circumference step (division) 68-Bottom plate
80-Rotary Damper 82-Housing
84-sole plate 86-rib
88-Small clearance 90-Rib slope (compartment)
100-Rotary Damper 102-Housing
104-Bottom Plate 106-Rib
108-Small clearance section 110-Rib step (compartment section)
120-Rotary Damper 122-Housing
124-Inner circumference 126-Step
128-Bottom Plate 130-Opposing Part
132-Opposite slope (compartment) 134-Small clearance
140-Rotary Damper 142-Housing
144-Inner peripheral surface 146-Step surface
148-Bottom Plate 150-Opposing Part
152-Opposite side step (block) 154-Small clearance

Claims (6)

Housings 30, 82, 102, 122 and 142 filled with viscous fluid 34,
A rotor 42 rotatably received in the housing, the rotor 42 transmitting a rotational force from the rotating shaft member 44 protruding to the outside;
Opposite portions (48, 130, 150) formed in the rotor and facing the inner peripheral surfaces (58, 124, 144) of the housing,
When the rotor is rotated, a large clearance portion 60 for increasing the clearance between the opposing portion and the housing and a small clearance portion 62,88,108,134,154 for reducing the clearance between the opposing portion and the housing than the large clearance portion are formed. And a partition portion partitioning the opposing portion or the housing so that the opposing portion facing the opposing portion and the small clearance portion gradually changes when the rotor is rotated.
The method according to claim 1,
And said partition is an inner circumferential step step (64) forming said small clearance portion (62) formed on said inner circumferential surface (58).

The method according to claim 1,
The small clearances 88 and 108 are formed on ribs 86 and 106 facing the inner circumferential surface of the opposing portion 48 which protrudes from the bottom plates 84 and 104 of the housings 82 and 102 to rotate,
And said partition being a rib inclined (90) or rib step (110) forming said small clearance (88,108) formed in said rib (86,106).
The method according to claim 1,
The inner circumferential surfaces 124 and 144 of the housings 122 and 142 are formed with stepped surfaces 126 and 146 that protrude inwardly,
The partition is a rotary damper, characterized in that the opposite slope (132) or the opposite step step (152) formed in the opposite portion (130,150) formed with a small clearance portion (134,154).
The method according to claim 2,
The inner peripheral surface step 64 is a rotary damper, characterized in that inclined toward the bottom plate (68) of the housing (30). The method according to any one of claims 1 to 5,
Rotary dampers, characterized in that for forming a small clearance portion (62, 88, 108, 134, 154) to gradually increase the facing area with the opposing portion so that the operation of the braking object attached to the rotating shaft member 44 is gradually slowed from the start of operation .

Images