CN100346086C

CN100346086C - Multi-axle rotation damper

Info

Publication number: CN100346086C
Application number: CNB031460763A
Authority: CN
Inventors: 高桥保弘; 织田信寿
Original assignee: TOK Bearing Co Ltd
Current assignee: TOK Bearing Co Ltd
Priority date: 2002-08-07
Filing date: 2003-07-21
Publication date: 2007-10-31
Anticipated expiration: 2023-07-21
Also published as: CN1479024A; JP4340949B2; CN101131192A; JP2004068945A; CN101131192B

Abstract

Provided is a rotary damper with a multi-layered shaft capable of performing entire assembling operation from one direction and simplifying assembling processes and reducing the number of components and reducing manufacturing costs. The rotary damper comprises a casing with a bottom at one end and an opening at other end in an axial direction, forming a fluid chamber filled with viscous fluid in its inside, a rotary member comprised of a base housed in the fluid chamber and a shaft extending out of the fluid chamber and relatively rotatable against the casing, and a fluid torque control means controlling existence and scale of torque generated by rotation of the rotary member in cooperation with the base of the rotary member. One or a plurality of partition walls dividing the fluid chamber in the casing into a plurality of fluid sub-chambers and being independent from the casing are provided, and the plurality of the rotary member in which the bases are respectively housed in the plurality of the sub-chambers are provided with a multi-layered shaft structure having relatively coaxial shafts.

Description

Rotary damper with multi-layered shaft

Technical field

Each that the present invention relates to plural switch member such as the toilet seat of for example closet and toilet covers invests the rotary damper with multi-layered shaft of damping.

Background technique

Open the disclosed twin shaft rotation damper of flat 10-184741 communique as Japanese kokai publication hei 5-296267 communique and spy,, can realize that to whole damper miniaturization is favourable owing to constitute cross-compound arrangement with the axial region of two rotary components.

Under the situation of the twin shaft rotation damper shown in Figure 1 in Japanese kokai publication hei 5-296267 communique, utilize the spacer portion 20 that is made of one with shell, promptly utilize the next door that enclosure axially is being divided into two-part.In the fluid locellus that utilizes this next door to divide, be provided with two rotary components respectively, i.e. first rotatingshaft 17 and second rotatingshaft 18, these two rotary components form the concentric cross-compound arrangements of axial region.

The situation of the twin shaft rotation damper shown in Figure 1 in the Japanese kokai publication hei 10-184741 communique is also the same with it, in order axially enclosure to be divided into first Room 21 and second Room 22, and is provided with the spacer portion 6 that is made of one with shell, i.e. the next door.In first Room 21 that utilizes this next door to divide and second Room 22 first rotary component 31 and second rotary component 32 are set respectively, these two rotary components form the concentric cross-compound arrangement of axial region.

Any of no matter above-mentioned existing twin shaft rotation damper, because being equivalent to the spacer portion and the shell in next door is made of one, following in the face of the special explanation of assembling method of opening flat 10-184741 number twin shaft rotation damper, increased the assembling procedure and the amount of parts of rotation damper.

The spy opens under the situation of the twin shaft rotation damper in the flat 10-184741 communique in assembling, and the left side opening portion inserts first rotary component 31 in first Room 21 from the figure of shell 2 at the beginning.

Secondly, be fixed on the shell 2 with this opening portion sealing and with end cap 7 with first end cap 7.At this moment, between end cap 7 and shell 2, seal with sealed member 10b such as O shape rings.

Then, the opening portion on right side among the figure is upwards made under the situation that shell 2 erects, inject viscous liquid from this opening portion, thereby at first Room 21 and second Room, the 22 filling viscous liquids divided by spacer portion 6.

Subsequently, from this opening portion second rotary component 32 is inserted second Room 22.At this moment, wait between sealed member 10b, 10a can 2 and second rotary component 32 and between first rotary component 31 and second rotary component 32 with O shape ring respectively, thereby make viscous liquid can't help to spill between the shell 2 and second rotary component 32 and between first rotary part 31 and second rotary component 32.

At last, with second end cap, 8 these opening portions of sealing.

Yet, the assembling method of above-mentioned existing rotation damper, owing to there is the spacer portion 6 that is made of one with it in the enclosure, it is the next door, first rotary component 31 must be from figure the left side opening portion, second rotary component 32 must be respectively charged in the shell 2 by this both direction of right openings portion from figure, thereby, must first and second end cap be installed respectively at the opening portion of the left and right sides in the final operation after the rotary component assembling, thereby the assembling procedure cost is many man-hour.

Have, the twin shaft rotation damper that utilizes existing assembling method to make is because the end cap that they not only must two sealing usefulness again, and the sealing position reaches three places, also increased the amount of parts of end cap and sealed member, corresponding therewith assembling procedure also increases, thereby manufacture cost is improved.

Also there is same problem in the assembling method of the twin shaft rotation damper in the Te Kaiping 5-296267 communique.

Summary of the invention

Therefore, task of the present invention is to provide a kind of to these shortcomings that existing twin shaft rotation damper had improved rotary damper with multi-layered shaft in addition.

In order to address the above problem, realize task of the present invention, the structure of rotary damper with multi-layered shaft of the present invention is to comprise: shell, its axial end is the bottom, the other end is an opening portion, is formed on the fluid chamber that viscous liquid is equipped with in inside; Rotary component is made of the axial region that is contained in the base portion in the above-mentioned fluid chamber and protrude in outside the above-mentioned fluid chamber, and can be relative to freely rotating relative to above-mentioned shell; The fluid torque control unit, control having or not and size along with the torque that rotation produced of this rotary component with the base portion interlock of above-mentioned rotary component, it is characterized in that: have and be configured in the above-mentioned shell, divide above-mentioned fluid chamber the one or more next doors that are a plurality of fluid locellus, are provided with above-mentioned shell split, the axial region that base portion is contained in a plurality of rotary components in each of above-mentioned a plurality of fluid locellus constitutes concentric multiaxis structure mutually.

By next door and shell split are provided with, during assembling operation, owing to can insert first rotary component and second rotary component from the same opening portion of shell, thereby, can assemble and make assembling procedure to simplify by a direction.

Owing to have the bottom at an axial end, promptly make the shell that what is called has the end, an end cap is just much of that, and also reduce at the sealing position; Owing to reduced the amount of parts of end cap and sealed member, thereby also reduced assembling procedure correspondingly, manufacture cost is reduced.

Because next door and shell are made split, also utilize same shell to make multiaxis structure more than three easily, therefore, can also realize under the situation that does not change shell and the structure of the corresponding rotary damper with multi-layered shaft of switch member more than three.

In alternative plan of the present invention, have the intercommunicating pore that is communicated with adjacent above-mentioned fluid locellus on the next door.Whereby, when assembling operation, can be by the operation of once injecting viscous fluid a plurality of fluid locellus of filling simultaneously, thereby assembling procedure is simplified.

Description of drawings

Fig. 1 is the part longitudinal section of internal structure of the twin shaft rotation damper in the next door of expression with first structure example of the present invention.

Fig. 2 is the next door of first structure example of the present invention, and Fig. 2 (a) is its front view, and Fig. 2 (b) is the sectional view along the A-A line of Fig. 2 (a).

Fig. 3 is the front view in the next door of second structure example of the present invention.

Fig. 4 is the sectional view along the B-B line of Fig. 1.

Fig. 5 is the sectional view along the C-C line of Fig. 1.

Fig. 6 is the sectional view of the action of expression first rotary component.

Fig. 7 is the sectional view of the action of expression second rotary component.

Embodiment

Below, with reference to accompanying drawing one embodiment of the present of invention are described.Fig. 1 is the part longitudinal section of internal structure of the twin shaft rotation damper in the next door of expression with first structure example of the present invention.Fig. 2 (a) is the front view in the next door of expression first structure example of the present invention, and Fig. 2 (b) is the sectional view along the A-A line of Fig. 2 (a), and Fig. 3 is the front view in the next door of second structure example of the present invention.

As shown in Figure 1, twin shaft rotation damper of the present invention has shell 2, and this shell 2 is made bottom 3 sealings that are made of one with it of its axial end, its other end opening with plastic materials.Be formed with the fluid chamber of the high viscous fluid 5 of filling envelope toughness in the inside of shell 2.

In addition, twin shaft rotation damper 1 of the present invention whole or its are a part of also can be made of other materials such as metals.

Fluid chamber utilizes the next door 6 of first structure example of being arranged to freely to install and remove in the axial centre of shell 2 to be divided into the first fluid locellus 7 and the second fluid locellus 8.In each first fluid locellus 7 and the second fluid locellus 8, the

base portion

11,12 of first rotary component 9 and second rotary component 10 is housed respectively.

In addition, in order to constitute three rotation dampers, can prepare two above-mentioned next doors 6, and be installed in respectively in the shell 2, thereby fluid chamber is divided into three fluid locellus.In Fig. 1, next door 6 has the through hole 15 that the axial region 13 that is used for first rotary component 9 passes at central position.The peripheral part of first fluid locellus 7 side on one side in next door 6 cooperates with the stepped part 17 of the inner peripheral surface 16 that is arranged on shell 2.The central position of second locellus 8 side on one side in next door 6 forms circular recess, and the formed protuberance 18 of the middle body of the bottom surface of the base portion 12 of second rotary component 10 is contained in wherein.

In addition, among Fig. 1, though next door 6 is expressed as the situation at the substantial middle position that is installed in shell 2, also can be according to the design torque value that is produced at first fluid locellus 7 and the second fluid locellus 8 and is offset to some extent with central position in its mounting point.

For example use on the opening portion 4 of the other end of shell 2 that bolt 50 is installed with end cap 19 with holes, the

axial region

13,14 of first and second rotary component protrudes in outside the shell 2 from this hole 20 in the lump.Second rotary component 10 is a hollow shape, and the axial region 13 of first rotary component 9 passes the hollow space of the base portion 12 of second rotary component 10 and axial region 14 by the hole 15 of the central position that is arranged on next door 6 and protrudes in outside the shell 2.

Though can both being centres ground with the axle center O of shell 2, first rotary component 9 and second rotary component 10 rotate, but, can not drive another rotary component owing to the rotation of a rotary component and rotate simultaneously owing between the inner peripheral surface 22 of the hollow space of the outer circumferential face 21 of the axial region 13 of first rotary component 9 and second rotary component 10, be provided with small gap.

Owing to disposed the O shape ring 23 as sealed member between first rotary component 9 and second rotary component 10, the viscous liquid 5 that can prevent 7,8 of two fluid locellus is by leaking between two

rotary components

9,10.

On the outer circumferential face of the base portion 12 that is positioned near second rotary component 10 the end cap with holes 19 of shell 2, be formed with sealing with groove 24, O shape ring 23 is inlaid into wherein.Therefore, can prevent that viscous liquid 5 is from leaking between the shell 2 and second rotary component 10.

Front end at the axial region 13 of first rotary component 9 is formed with staight shank 25, this staight shank is partially submerged on the rotatingshaft of not shown toilet cover just can be connected and fixed with toilet cover.Equally, on the front end of the axial region 14 of second rotary component 10, also form staight shank 25, this staight shank is partially submerged on the rotatingshaft of not shown toilet seat and just can be connected and fixed with toilet seat.So, two switch member just should braking, promptly toilet cover and toilet seat are connected on first and second

rotary component

9,10, thereby invest its damping force.

Below, according to Fig. 2 the structure in the next door of first structure example is described in detail.

As Fig. 2 (a) and (b), the global shape in next door 6 is discoid dish, has: the diapire 28 in the hole 15 that the axial region 13 that the periphery wall 27 that its outer circumferential face contacts with the inner peripheral surface 16 of shell 2 and its central position have first rotary component 9 passes.That side of the concavity of dish next door 6 its diapires 28 of formation is relative with the protuberance 18 of the central position of the bottom surface of the base portion 12 that is arranged on second rotary component 10, and the peripheral part of the another side of diapire 28 cooperates with the stepped part 17 of shell 2.

The periphery wall 27 of next door 6 is provided with pair of notches 29,29.The formation of this otch 29 makes it when the assembling procedure that next door 6 is installed in the shell 2, be used to insert along the axial setting of the inner peripheral surface 16 of shell 2 will be in protruding wall 31 described later.

Below, according to Fig. 3 the structure in the next door of second structure example is described.

The next door of second structure example is also to have at axial its periphery wall 27 of perforation on the basis of the structure in the next door 6 of first structure example, be used to be communicated with two pairs of intercommunicating pores 30 between first and second fluid locellus 7,8.As shown in Figure 3, these intercommunicating pores 30 are made of 2 little circular holes, be arranged on otch 29 near.

Intercommunicating pore 30 is not limited to illustrated shape so long as its formation can be communicated with

adjacent fluid locellus

7,8 gets final product, and also can be big circular hole, polygonal hole etc.In addition, though the place that the position of intercommunicating pore is not limited to the circumferencial direction of illustrated periphery wall 27 is set, should be to constitute underpressure chamber b described later, the position of the circumferencial direction of b ', preferably near the position the described later protruding wall 31 of shell 2.

Below, the assembling process to the twin shaft rotation damper 1 in next door 6 with first structure example that intercommunicating pore is not set describes with reference to Fig. 1.

When this twin shaft rotation damper of assembling, at first, the opening portion 4 that will be arranged in the shell 2 in figure left side is placed vertically up, viscous fluid 5 is injected from this opening portion 4, the amount of filling viscous fluid is to consider the amount of volume of the base portion 11 of first rotary component 9 in fluid chamber, that is, suppose under the situation of the base portion 11 that first rotary component 9 is housed, to be full of the amount of first fluid locellus 7.

Secondly, in the fluid chamber that this opening portion inserts first rotary component 9 and next door 6 shells 2 successively.Whereby, fluid chamber just is divided into the first fluid locellus 7 of the base portion 11 that holds first rotary component 9 and the second fluid locellus of the base portion 12 of second rotary component 10 put in next procedure.

Then, inject viscous fluid 5 from this opening portion 4 again, the amount of filling viscous fluid is to consider the amount of volume of the base portion 12 of second rotary component 10 in the second fluid locellus 8, promptly, suppose under the situation of the base portion 12 that holds second rotary component 10, to be full of the amount of the second fluid locellus 8, and then second rotary component 10 is inserted the second fluid locellus 8.At this moment, between first rotary component 9 and second rotary component 10, and between the shell 2 and second rotary component, seal, in order to avoid viscous fluid spills between these gaps with O shape ring.

At last, end cap 19 is installed to seal this opening portion 4.

As mentioned above, the assembling procedure of twin shaft rotation damper 1 with next door 6 of first structure example, owing to can all constitute the assembling operation of component from a direction of shell 2 with opening portion 4, when assembling procedure is simplified, because the other end of shell 2 is shut as bottom 3, as long as an end cap is just much of that, seal necessary part and also reduce to two places, its result, because formation number of components and parts and assembling procedure all reduce, thereby can reduce the manufacture cost of twin shaft rotation damper 1.

In addition, when the rotation damper of assembling more than three, before the final assembling procedure of assembling end cap 19, can repeat one or many and insert second next door, inject viscous fluid, and then the 3rd rotary component be inserted the operation of three-fluid locellus.

Below, the assembling procedure to the twin shaft rotation damper 1 in next door 6 with second structure example that is provided with intercommunicating pore 30 describes with reference to Fig. 1 equally.

When this twin shaft rotation damper 1 of assembling, identical with the situation in the next door 6 of first structure example, at first, make shell 2 erect placement up the opening portion in left side, inject viscous fluid 5 from this opening portion 4, the amount of filling viscous fluid is to consider the amount of the volume of the component that all hold in the fluid chamber, that is, if held the amount that is full of first and

second fluid locellus

7,8 under the situation of the component that all hold.

Secondly, with first rotary component 9, next door 6 and second rotary component 10 fluid chamber in identical opening portion 4 insertion shells 2 successively.At this moment, with between O shape ring sealing first rotary component 9 and second rotary component 10 and between second rotary component 10 and the shell 2 in case viscous fluid from wherein spilling.

At last, end cap 19 is installed to seal this opening portion 4.

In addition, in above-mentioned assembling procedure, also can inject viscous fluid from this opening portion 4 again successively with after first rotary component 9, next door 6 and second rotary component 10 are from the fluid chamber that identical opening portion 4 inserts in the shell 2.At this moment, when intercommunicating pore 30 was aperture, it was effective that the working pressure machine is pressed into viscous fluid.

As mentioned above, the assembling procedure of twin shaft rotation damper 1 in next door 6 with second structure example is identical with the situation of first structure example, in the time of the assembling operation of the component that can all constitute from the opening portion 4 of the end that is positioned at shell 2, owing to be provided with intercommunicating pore 30 on the next door 6, operation that also can be by once injecting viscous fluid just can be with the first fluid locellus 7 and the second fluid locellus 8 of viscous fluid filling simultaneously fluid chamber, thereby assembling procedure is simplified more.

In addition, when the rotation damper of assembling more than three, in initial assembling procedure, the rotary component that the number cover can be constituted a group of rotary component and next door of multiaxis structure and constitute the final axle of multiaxis inserts in the fluid chamber in the shell successively.

Below, be that the example of the structure of the twin shaft rotation damper 1 that constituted of first structure example and second structure example describes with reference to Fig. 4 and Fig. 5 counter septum 6.Fig. 4 is the sectional view along the B-B line of Fig. 1, and Fig. 5 is the sectional view along the C-C line of Fig. 1.

As Fig. 4 and shown in Figure 5, the shell 2 of rotation damper 1 is that the center has by a pair of

protruding wall

31,31 first and second following

fluid locellus

7,8, that be provided with vertically on the inner peripheral surface of shell 2, that inwardly give prominence in symmetrical position with the axle center O of shell 2.The a pair of

protruding wall

31,31 of first and

second fluid locellus

7,8 has the effect that fluid chamber is divided into two adjacent chambers at circumferencial direction.But a pair of

protruding wall

31,31 of the second fluid locellus also has the effect that is used for the guide rail in the 6 insertion shells 2 of next door.By a pair of

protruding wall

31,31 and a pair of blade described later 34,34, at circumferencial direction first and

second fluid locellus

7,8 is divided into a of pressurized chamber, a ' and underpressure chamber b, b ' totally four chambers respectively.In addition, omitted viscous fluid 5 among Fig. 4 and Fig. 5.

As shown in Figure 4, outer circumferential face 33 sliding contacts of the base portion 11 of the front-end face 32 of the protruding wall 31 of the first fluid locellus 7 of shell 2 and first rotary component 9.The base portion 11 of first rotary component 9 is that the center has a pair of

blade

34,34 that is provided with vertically, outwards give prominence in symmetrical position on its outer circumferential face 33 with its axle center.The front-end face 35 of blade 34 and inner peripheral surface 16 sliding contacts of the first fluid locellus 7 of shell 2.And blade 34 is along with the rotation of first rotary component 9, slides along the inner peripheral surface 16 of the first fluid locellus 7 of shell 2.

Have again, on first rotary component 9, form a side from blade 34, connect base portion 11, in a pair of

fluid passage

36,36 of outer peripheral surface 33 upper sheds of base portion 11 to opposite side.As shown in Figure 4, the opening 37 on one side of fluid passage 36 switches to the root of blade 34 always.Yet the shape of the longitudinal plane of fluid passage 36 is not limited thereto, and also can be rectangle or other shape, and still, its opening 38 at least on one side must be able to not switch to a of pressurized chamber of blade 34, the root of an a ' side.In addition, the section configuration of the opening of fluid passage 36 also can be rectangle or other shape.

Shape by formed fluid passage 36 on the base portion 11 of first rotary component 9 and

opening

37,38 thereof with and size, can determine having or not and size of the damping torque that produced in the first fluid locellus 7.

In addition, though the control mechanism of the fluid torque of first fluid locellus 7 is made of the protruding wall 31 of the first fluid locellus 7 of above-mentioned fluid passage, shell 2 and the blade 34 of first rotary component 9, but be not limited thereto, so long as be arranged on the size of the torque that can be produced along with the rotation may command of rotary component of valve system between shell 2 and the blade 34 and so in first fluid locellus 7, which type of constitutes mechanism and all can.

As shown in Figure 5, outer peripheral surface 33 sliding contacts of the base portion 12 of the front-end face 32 of the protruding wall 31 of the second fluid locellus of shell 2 and second rotary component 10.The base portion 12 of second rotary component 10 is that the center has a pair of

blade

34,34 that is provided with vertically, give prominence to foreign side in symmetrical position on its outer circumferential face 33 with its axle center.The front-end face 35 of blade 34 and inner peripheral surface 16 sliding contacts of the second fluid locellus 8 of shell 2.And blade 34 is along with the rotation of second parts 10, slides along the inner peripheral surface 16 of the second fluid locellus 8 of shell 2.

Have again, on second rotary component 10, also be formed with a pair of

fluid passage

39,39 in outer peripheral surface 33 upper sheds of the base portion of the both sides of blade 34.And, on the inner peripheral surface 22 of the hollow space that forms on the base portion 12 of second rotary component 10, along the groove that certain width axially be set 42 of its circumferencial direction at shell 2.The groove 42 that is arranged on the base portion 12 of second rotary component 10 forms the part that is run through base portion 12 by a side of blade 34 to opposite side, combine with above-mentioned two

openings

40,41, in the second fluid locellus 8, constitute the

fluid passage

39,39 that is communicated with a of pressurized chamber, a ' and underpressure chamber b, b '.In addition, the

opening

37,38 of the fluid passage 36 of the

opening

40,41 of the fluid passage 39 of second rotary component 10 and first rotary component 9 is made roughly the same shape.

In addition, the fluid torque controling mechanism of the second fluid locellus 8 is by above-mentioned fluid passage 39, the protruding wall 31 of the second fluid locellus 8 of shell 2 and the blade of second rotary component 10 34 constitute, but be not limited thereto, so long as in the second fluid locellus 8, be arranged on the size of the torque that the rotation may command along with rotary component of valve system between shell 2 and the blade 34 and so on produced, also can be any type of formation mechanism.

Below, with reference to Fig. 6 the action of first rotary component 9 that constitutes as mentioned above, be connected with toilet cover is described.

What Fig. 6 (1) represented is the rotational position of first rotary component 9 of toilet cover full open position.What this rotational position was represented is first rotary component 9 reaches situation from the terminal area () of a direction to counterclockwise direction (direction of arrow B) rotation; In this terminal area, the state that the opening action of toilet cover is stopped fully by not shown outside brake member.

What Fig. 6 (2) represented is the rotational position of first rotary component 9 of toilet cover from fully open position to the state that is closed to half.This rotational position is represented be first rotary component 9 from the rotational position shown in Fig. 6 (1) along clockwise direction (direction of arrow A) begin rotation, the angle of rotation of its rotating distance is about 40 ° state.From Fig. 6 (1) to the rotating distance Fig. 6 (2) because first rotary component 9 is the roughly state rotation down of standard-sized sheet at the opening of the fluid passage 36 between a of pressurized chamber, a ' and underpressure chamber b, the b ', thereby rotate reposefully with can not producing high torque (HT).Therefore, toilet cover can be closed reposefully from the rotation initial stage.

What Fig. 6 (3) represented is the rotational position that toilet cover is closed to first rotary component 9 of the state about 2/3.What this rotational position was represented is that first rotary component 9 further rotates to the opposing party's terminal area along clockwise direction from the rotational position shown in Fig. 6 (2), and the angle of rotation of rotating distance is about 60 ° state.Even from Fig. 6 (2) to the rotating distance Fig. 6 (3) because the opening of the fluid passage 36 between a of pressurized chamber, a ' and underpressure chamber b, the b ' opens always, thereby first rotary component 9 does not produce high torque (HT) ground and rotates.Therefore, toilet cover is closed reposefully.

But, in the state shown in Fig. 6 (3), the front-end face 32 of protruding wall 31 that arrives the first fluid locellus 7 of shells 2 owing to the opening 38 of the another side of fluid passage 36 is closed, thereby the fluid passage 36 between a of pressurized chamber, a ' and underpressure chamber b, the b ' is closed fully.Therefore, the increased pressure of a of pressurized chamber, a ' and produce high torque (HT).Therefore, to toilet cover effect damping force.

What Fig. 6 (4) represented is the rotational position of first rotary component 9 of toilet cover buttoned-up status.What this rotational position was represented is that first rotary component 9 further is rotated in a clockwise direction from the terminal area shown in Fig. 6 (3), in this terminal area, and the state that the closing motion of toilet cover is stopped fully by not shown outside brake member.Therefore, toilet cover is closed fully.

Rotating distance from Fig. 6 (3) to the terminal area Fig. 6 (4), because the fluid passage 36 between a of pressurized chamber, a ' and underpressure chamber b, the b ' is in complete closing state, a of pressurized chamber, a ' keep under the state of high pressure to first rotary component, 9 generation damping functions be rotated.Therefore, because the effect of damping force is closed toilet cover at leisure.

In addition, first rotary component 9 begins rotation and when opening toilet cover to counterclockwise direction again from position that the toilet cover shown in Fig. 6 (4) is closed fully, because open at leisure a of pressurized chamber, a ' that close at the rotation initial stage and the fluid passage 36 between underpressure chamber b, the b ', thereby first rotary component 9 rotates except that do not produce high torque (HT) ground the rotation initial stage.Therefore, toilet cover when beginning to open from can both open reposefully with little power.

Below, with reference to 7 pairs in accompanying drawing as mentioned above the action of second rotary component 10 that constitute, that be connected with toilet seat describe.

As mentioned above, the fluid passage 39 of second rotary component 10 is except the fluid passage 36 of the part that connects base portion and first rotary component 9 is different, and all the other have essentially identical shape.Therefore the action of second rotary component 10 is identical with the action of first rotary component 9 basically.

That is,, be in the state that the opening action of toilet seat stops fully at the rotational position of second rotary component 10 shown in Fig. 7 (1).Under the state that toilet seat fully open position, opening action stop, because opening, the opening of the fluid passage 39 of the connection a of pressurized chamber, a ' and underpressure chamber b, b ' communicating, thus the zone of formation low torque.

From the fully open position of Fig. 7 (1) is closed to rotating distance Fig. 7 (2) of the state of half to the expression toilet seat, because second rotary component 10 roughly rotates under the state of standard-sized sheet at the opening of the fluid passage 39 between a of pressurized chamber, a ' and underpressure chamber b, the b ', thereby, rotation reposefully under the state that does not produce high torque (HT).Therefore, toilet seat began promptly to close reposefully from the rotation initial stage.

Even the rotating distance the Fig. 7 (3) that is closed to the state about 2/3 from Fig. 7 (2) to the expression toilet seat, because the opening of the fluid passage 39 between a of pressurized chamber, a ' and underpressure chamber b, the b ' is still opened, second rotary component 10 still rotates under the state that does not produce high torque (HT).Therefore, toilet seat is closed reposefully.

But under the state shown in Fig. 7 (3), the front-end face 32 of protruding wall 31 that arrives the second fluid locellus 8 of shells 2 owing to another opening 41 of fluid passage 39 is closed, the increased pressure of a of pressurized chamber, a ' and produce high torque (HT).Therefore, toilet seat is subjected to the effect of damping force.

Close Fig. 7 (3) of rotational position of second rotary component 10 of toilet seat state from expression, closing motion to the expression toilet seat stops fully, in the rotating distance of the terminal area between Fig. 7 (4) of the complete pent state of toilet seat, because the fluid passage 39 between a of pressurized chamber, a ' and underpressure chamber b, the b ' is in complete closing state, keep at a of pressurized chamber, a ' under the state of high pressure, second rotary component 10 rotates under the situation of the effect that is subjected to damping force.Therefore, because the effect of damping force, toilet seat is closed at leisure.And, second rotary component 10 begins counterclockwise rotation from the toilet seat complete shut-down position shown in Fig. 7 (4) and when opening toilet seat again, because open at leisure a of pressurized chamber, a ' that close at the rotation initial stage and the fluid passage 39 between underpressure chamber b, the b ', thereby, except that the rotation initial stage, second rotary component 10 does not produce the rotation of high torque (HT) ground.Therefore, toilet seat is opened with little power reposefully except that the beginning external enwergy.

As mentioned above, rotary damper with multi-layered shaft of the present invention, according to first structure example, can carry out whole assembling operations from a direction of shell, assembling procedure is simplified, because of component number and assembling procedure reduce cost is reduced simultaneously, can give damping force to the switching body more than two independently, and then, utilize identical shell can be applied to switching body more than three at an easy rate.

Have, rotary damper with multi-layered shaft of the present invention according to second structure example, can be filled to a plurality of fluid locellus with viscous fluid in an injection process when assembling operation, can further simplify assembling procedure again.

Claims

1. rotation damper, this rotation damper comprises: shell, its axial end is the bottom, the other end is an opening portion, is formed on the fluid chamber that viscous liquid is equipped with in inside; Rotary component is made of the axial region that is contained in the base portion in the above-mentioned fluid chamber and protrude in outside the above-mentioned fluid chamber, and can be relative to freely rotating relative to above-mentioned shell; The fluid torque control unit, control having or not and size along with the torque that rotation produced of this rotary component with the base portion interlock of above-mentioned rotary component, it is characterized in that: have and be configured in the above-mentioned shell, divide above-mentioned fluid chamber the one or more next doors that are a plurality of fluid locellus, are provided with above-mentioned shell split, the axial region that base portion is contained in a plurality of rotary components in each of above-mentioned a plurality of fluid locellus constitutes concentric multiaxis structure mutually;

Above-mentioned next door forms the hole at central part, and, central position in the side forms circular recess, the axial region of a rotary component in above-mentioned a plurality of rotary component runs through in the above-mentioned hole, and, held the protuberance of the bottom central part of the base portion that is formed at another rotary component in above-mentioned a plurality of rotary component at above-mentioned recess.

2. rotation damper according to claim 1 is characterized in that: the intercommunicating pore that is communicated with between the above-mentioned fluid locellus that is provided with on the above-mentioned next door adjacency.