CN205937757U - Hand -pulling type speed reduction projection curtain and reduction gear - Google Patents
Hand -pulling type speed reduction projection curtain and reduction gear Download PDFInfo
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- CN205937757U CN205937757U CN201620704104.5U CN201620704104U CN205937757U CN 205937757 U CN205937757 U CN 205937757U CN 201620704104 U CN201620704104 U CN 201620704104U CN 205937757 U CN205937757 U CN 205937757U
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- decelerator
- protecgulum
- projection screen
- curtain
- speed reducer
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Abstract
The utility model discloses a hand -pulling type speed reduction projection curtain and reduction gear. A reduction gear, include gear assembly casing, with reduction gear protecgulum that gear assembly casing is connected and passing the dabber of reduction gear protecgulum, adorn in bearing, retarder rotor and the one -way bearing of spindle, the retarder rotor with has the clearance between the gear assembly casing just the clearance intussuseption is filled with the damping oil. The utility model discloses a hand -pulling type speed reduction projection curtain, including foretell reduction gear and projection curtain shell, install in rotating -barrel in the projection curtain shell, install in main assemblage of spring, one end winding in the rotating -barrel are in the last curtain of rotating -barrel, the hand power assembly of being connected with the curtain other end. Because the utility model provides a projection curtain adopts above -mentioned reduction gear, therefore enables to reduce the noise when curtain can slowly be retrieved, reaches the effect of silence.
Description
Technical field
This utility model is related to projection screen field, and specifically, this utility model is related to a kind of hand pulling type deceleration projection
Curtain and decelerator.
Background technology
With scientific and technological development, project equipment and be increasingly entering in family, therefore manual projection curtain is small-sized because of it
Change, simple structure and widely used.But, in prior art, curtain reclaims the decelerator using is gear reduction unit,
Gear is in operation and can send friction noise, does not reach muting function.
Utility model content
Primary and foremost purpose of the present utility model aims to provide a kind of decelerator that can reduce noise.
Another object of the present utility model aims to provide a kind of hand pulling type deceleration projection screen applying above-mentioned decelerator, its energy
Enough reduction noises when curtain reclaims.
To achieve these goals, this utility model provides technical scheme below：
A kind of decelerator, is connected and has the decelerator protecgulum of through hole including speed reducer housing with described speed reducer housing
And pass through described decelerator protecgulum through hole mandrel, described mandrel be located at speed reducer housing in partly on be arranged with deceleration
Device rotor and unidirectional needle bearing, described retarder rotor is provided with first inner chamber, and described unidirectional needle bearing is located at described subtracting
In the first inner chamber of fast device rotor, between described retarder rotor and described speed reducer housing, there is gap, outside described decelerator
A confined space comprising described gap is limited between shell, retarder rotor and decelerator protecgulum, and in this confined space
It is filled with damping oil.
Because described damping oil has viscosity, retarder rotor and unidirectional needle bearing can be driven to rotate so that described subtract
Fast device can more rotate easily；And when speed reducer housing rotates backward under external force, due to unidirectional needle bearing
Locking, and then lead to retarder rotor locking, the rotation of speed reducer housing needs the damping overcoming it and retarder rotor between
The damping force of oil, thus there is slowing effect.Due to slowing effect need not be realized by gear train assembly, in decelerator fortune
Noise will not be produced during row, thus there is preferable muting function.
Preferably, described decelerator protecgulum aft edge is provided with first step, and described first step is equiped with for right
Sealing is implemented to limit the sealing ring of described confined space in the junction of speed reducer housing and decelerator protecgulum.
Preferably, offer second inner chamber in the middle part of described decelerator protecgulum tail end, be embedded with described second inner chamber for
Outside framework oil seal to mandrel and the sealing of decelerator protecgulum junction.
Preferably, described decelerator protecgulum front end is provided with the 3rd inner chamber, built with needle bearing, and described needle roller axle
Bearing sleeve is connected on described mandrel.
Preferably, described mandrel one end passes from described unidirectional needle bearing, and pass part be sequentially provided with second
It is correspondingly provided with pad and jump ring, in order to limit described unidirectional needle roller axle on step and draw-in groove, described second step and described draw-in groove
The axial movement held.
Preferably, described reducer shell afterbody offers a steam vent being conducted with described confined space.
A kind of hand pulling type deceleration projection screen, the tube including projection screen shell, being installed on described projection screen inside the shell, installation
In the main assemblage of spring in described tube, curtain on described tube for the one ends wound and the curtain other end is connected pulls assembly；
The localizer that described main assemblage of spring includes torsion spring and is connected to described one end, described localizer reveals from described tube one end
Go out and described projection screen cage connection, the described tube other end, by one speed reducer and described projection screen cage connection, described subtracts
Fast device is also connected with the other end of described torsion spring, and described decelerator is above-mentioned decelerator.
Preferably, described projection screen shell includes offering the end cap of fastening hole inside it, the mandrel one of described decelerator
End projects from decelerator protecgulum front end and forms protuberance, and described end cap is fastened on described protuberance.
Preferably, the described stiffener that assembly includes being connected with described curtain end, by stiffener card in the inner of pulling
Lower trombone slide and the trombone slide lid at the lower trombone slide two ends of capping.
The aspect that this utility model adds and advantage will be set forth in part in the description, and these will be from explained below
In become obvious, or recognized by practice of the present utility model.
Brief description
The above-mentioned and/or additional aspect of this utility model and advantage from the following description of the accompanying drawings of embodiments will
Become obvious and easy to understand, wherein：
Fig. 1 is the sectional view of decelerator of the present utility model；
Fig. 2 is the exploded view of the decelerator shown in Fig. 1；
Fig. 3 is the exploded view of hand pulling type deceleration projection screen of the present utility model；
Fig. 4 is the schematic diagram of the hand pulling type deceleration projection screen deployed condition shown in Fig. 3, there is shown with tube and decelerator
Annexation, the shown direction of arrow is described tube rotation direction now；
Fig. 5 is the schematic diagram of the hand pulling type deceleration projection screen collapse state shown in Fig. 3, there is shown with tube and decelerator
Annexation, the shown direction of arrow is described tube rotation direction now.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of described embodiment is shown in the drawings, wherein ad initio
To the element that same or similar label represents same or similar element or has same or like function eventually.Below by ginseng
The embodiment examining Description of Drawings is exemplary, is only used for explaining this utility model, and can not be construed to of the present utility model
Limit.
This utility model provides a kind of hand pulling type deceleration projection screen and its decelerator, as Figure 1-Figure 5, with reference to attached
Figure describes in detail to this utility model.
Fig. 1 and Fig. 2 illustrates decelerator 200 of the present utility model jointly, and it includes speed reducer housing 201, is connected to institute
State the decelerator protecgulum 202 of speed reducer housing 201 front end and penetrate the core in described speed reducer housing 201 from decelerator protecgulum
Axle 203.
Through hole (non-label, similarly hereinafter) is had on described decelerator protecgulum 202, according to decelerator protecgulum 202 front end to tail end
Direction, described decelerator mandrel 203 pass through decelerator protecgulum 202 on through hole stretch in described speed reducer housing 201.
Described decelerator protecgulum 202 be in step-like, its front edge position is provided with multiple screw holes, with described decelerator
Housing 201 connects the accommodation space constructing for installing other internal parts；Described mandrel 203 is located at described speed reducer housing
In 201 and retarder rotor 207 and unidirectional needle bearing 208 are arranged with from the position that decelerator protecgulum 202 tail end exposes.
Wherein, described retarder rotor 207 has first inner chamber (non-label, similarly hereinafter), and described unidirectional needle bearing 208 is placed in described
Intracavity in one.There is between described retarder rotor 207 and the inwall of described speed reducer housing 201 gap (non-label, similarly hereinafter),
Described retarder rotor 207, speed reducer housing 201 and decelerator protecgulum 202 jointly limit one and comprise the airtight of described gap
Space 212, and in it, it is filled with damping oil 700.
Because unidirectional needle bearing 208 has, one direction is (positive) to be rotated, the spy of rightabout locking (cannot rotate)
Property, when speed reducer housing 201 rotates forward under external force, due to the viscosity of damping oil 700, drive retarder rotor
207 and unidirectional needle bearing 208 rotate, decelerator 200 can more rotate easily；When speed reducer housing 201 is in outer masterpiece
With under rotate backward when, due to unidirectional needle bearing 208 locking, and then lead to retarder rotor 207 locking, speed reducer housing
The damping force of the damping oil 700 that 201 rotation needs to overcome it and retarder rotor 207 between, thus there is slowing effect.By
In slowing effect being realized by gear train assembly, noise will not be produced in decelerator 200 running, have relatively
Good muting function.
Further, also include the sealing ring 206 on the first step (non-label) located at decelerator protecgulum 202 tail end,
For sealing to the junction of decelerator protecgulum 202 and speed reducer housing 201, to avoid damping oil 700 to ooze from junction
Go out.
Further, offer second inner chamber (non-label) in the middle part of described decelerator protecgulum 202 tail end, in it, be embedded with bone
Frame oil sealing 205, for sealing to the junction of mandrel 203 and decelerator protecgulum 202, to avoid damping oil 700 from deceleration
Device protecgulum 202 is oozed out with the junction of mandrel 203.
Due to having sealing ring 206 and outside framework oil seal 205, can to speed reducer housing 201 and decelerator protecgulum 202, subtract
Sealing gap between fast device protecgulum 202 and mandrel 203, prevents damping oil 700 from oozing out at gap, on the one hand can protect
Card decelerator 200 is unlikely to affect normal work because of oil leak, is on the one hand also possible to prevent the equipment using this decelerator 200
By oil leaking pollution.
Further, described decelerator protecgulum 202 front center offers the 3rd inner chamber (non-label), is embedded with rolling in it
Needle bearing 204, and this needle bearing 204 is set on described mandrel 203.It will be understood by those skilled in the art that needle roller axle
It is filled with thin and long roller, radial structure is compact, for the supporting result of the size-constrained system of radially installed.
Further, described mandrel 203 stretches into one end in described speed reducer housing 201 from described unidirectional needle bearing
Expose in 208, and be provided with second step (non-label, similarly hereinafter) and position at the position of described unidirectional needle bearing 208
Draw-in groove (non-label, similarly hereinafter) on rear side of second step, with after mandrel 203 is mutually assembled with unidirectional needle bearing 208
At two steps install pad 209, snap in draw-in groove jump ring 210 unidirectional needle bearing 208 is carried out spacing, to avoid decelerator
Unidirectional needle bearing 208 vibration in the axial direction in 200 work process, can avoid coming off of mandrel 203 simultaneously.
Further, the tail end of described speed reducer housing 201 offers the aerofluxuss being conducted with above-mentioned confined space 212
Hole 211, during for installing internal part (such as retarder rotor) in reducer shell 201, can pass through this steam vent 211 row
Go out the air in reducer shell 201 and unnecessary damping oil 700, in order to install.
Referring to Fig. 3～Fig. 5, this utility model also provides a kind of hand pulling type deceleration projection screen applying above-mentioned decelerator 200
1000, including projection screen shell 100, the tube 400 that is installed in projection screen shell 100, the spring that is installed in tube 400 total
What one-tenth 300, curtain 500 on described tube 400 for the one ends wound were connected with curtain 500 other end pulls assembly 600, described
One end of tube 400 is connected with described projection screen shell 100 by described main assemblage of spring 300, and its other end is by above-mentioned deceleration
Device 200 is connected with projection screen shell 100.
Described main assemblage of spring 300 includes torsion spring 302 and the localizer 301 fixing with described torsion spring 302 one end, described spring
Assembly 300 is loaded in tube 400 by one end of tube 400, and so that described localizer 301 is exposed by tube 400 one end, to pass through
Described localizer 301 is mutually installed with described projection screen shell 100；Described decelerator 200 is connected to the other end of torsion spring 302, and
Equally it is exposed to outside tube 400 and mutually install with described projection screen shell 100.
Described projection screen shell 100 includes left end cap 101 and right end cap 102, left end cap 101 and right-hand member positioned at its two ends
A fastening hole is respectively offered inside lid 102.From above, mandrel 203 one end of described decelerator is from decelerator protecgulum 202
Formation protuberance is exposed in side, and described localizer one end also is provided with the connecting post similar to protuberance.Described tube 400 is inserted from one end
Enter in described projection screen shell 100, the left end cap 101 of described projection screen shell 100 and right end cap 102 are respectively with its fastening hole button
It is combined on protuberance and connecting post, the installation of tube 400 and projection screen shell 100 is completed with this.
One horizontal draw-in groove is had on described tube 400, described curtain 500 one end is connected on the horizontal draw-in groove of tube 400,
The other end is used for more easily drop-down curtain 500, supports simultaneously equipped with a stiffener 501 (such as aluminum strip), described stiffener 501
Curtain 500 horizontal spreading.
Described drop-down assembly includes lower trombone slide 600, and described stiffener 501 is loaded in lower trombone slide, and lower trombone slide 600 two ends are provided with
Two trombone slide lids 601 and 602, equipped with an arc drawstring in the middle part of described stiffener 501, convenient use person is drop-down and reclaims curtain
500.
Hand pulling type deceleration projection screen operation principle of the present utility model is as follows：
Incorporated by reference to Fig. 4, when needing curtain 500 to launch, user's handss hold lower trombone slide 600 makes curtain 500 open up downwards toward drop-down
Open, curtain 500 makes tube 400 rotate counterclockwise (this direction is unidirectional needle bearing 208 usable rotational direction, namely positive), turns
Pipe 400 drives speed reducer housing 201 to rotate forward, due to being marked with damping oil between speed reducer housing 201 and retarder rotor 207
700, and damping oil 700 has viscosity, therefore drives retarder rotor 207 to rotate and then drive unidirectional needle bearing 208 to rotate,
Curtain is enable to be launched easily.During curtain 500 launches, the torsion spring 302 of main assemblage of spring 300 is twisted and accumulates torsion
Power.
Incorporated by reference to Fig. 5, when needing to reclaim curtain, with handss by lower trombone slide 600 toward drop-down rear relieving, speed reducer housing 201
Inverting under the twisting force of main assemblage of spring 300, and then drive tube 400 to rotate clockwise (and then makes curtain be wrapped in tube
Above realize the recovery of curtain).In the process, unidirectional needle bearing 208 is due to moving in opposite direction and locking, and hinders
Hinder the rotation of retarder rotor 207, thus, the rotation of speed reducer housing 201 needs to overcome it and retarder rotor 207 between
The damping force of damping oil 700, and then reduce its rotating speed it is achieved that the effect that slowly reclaims of curtain 500.Due to without using gear
Reaching slowing effect, hand pulling type deceleration projection screen of the present utility model has preferable muting function to power train.
Hand pulling type deceleration projection screen of the present utility model, can according to the size of projection screen 500 speed reducer housing 201 with subtract
Fill the damping oil 700 of different viscosities between fast device rotor 207, and then reach required deceleration and muting function.
The above is only some embodiments of the present utility model it is noted that common skill for the art
For art personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (9)
1. a kind of decelerator is connected with described speed reducer housing and has subtracting of through hole it is characterised in that including speed reducer housing
Fast device protecgulum and the mandrel of the through hole through described decelerator protecgulum, the partly upper set that described mandrel is located in speed reducer housing
It is provided with retarder rotor and unidirectional needle bearing, described retarder rotor is provided with first inner chamber, described unidirectional needle bearing position
In the first inner chamber of described retarder rotor, between described retarder rotor and described speed reducer housing, there is gap, described
Limit a confined space comprising described gap between speed reducer housing, retarder rotor and decelerator protecgulum, and this is close
Close and in space, be filled with damping oil.
2. decelerator according to claim 1 is it is characterised in that described decelerator protecgulum aft edge is provided with First
Rank, described first step is equiped with for implementing sealing to limit to the junction of speed reducer housing and decelerator protecgulum
State the sealing ring of confined space.
3. decelerator according to claim 1 is it is characterised in that offer in second in the middle part of described decelerator protecgulum tail end
Chamber, is embedded with described second inner chamber for the outside framework oil seal to mandrel and the sealing of decelerator protecgulum junction.
4. decelerator according to claim 1 is it is characterised in that described decelerator protecgulum front end is provided with the 3rd inner chamber, its
Built with needle bearing, and described needle bearing is socketed on described mandrel.
5. decelerator according to claim 1 is it is characterised in that described mandrel one end is worn from described unidirectional needle bearing
Go out, and pass part be sequentially provided with second step and draw-in groove, described second step and described draw-in groove are correspondingly provided with pad and
Jump ring, in order to limit the axial movement of described unidirectional needle bearing.
6. decelerator according to claim 1 it is characterised in that described reducer shell afterbody to offer one close with described
Close the steam vent that space is conducted.
7. a kind of hand pulling type deceleration projection screen, the tube including projection screen shell, being installed on described projection screen inside the shell, is installed on
Main assemblage of spring in described tube, the one ends wound curtain on described tube pulls assembly with the curtain other end is connected；Institute
State the localizer that main assemblage of spring includes torsion spring and is connected to described one end, described localizer exposes from described tube one end
With described projection screen cage connection, the described tube other end is by one speed reducer and described projection screen cage connection, described deceleration
Device is also connected with the other end of described torsion spring it is characterised in that described decelerator is described in claim 1 to 6 any one
Decelerator.
8. hand pulling type deceleration projection screen according to claim 7 is it is characterised in that described projection screen shell is included inside it
Offer the end cap of fastening hole, described mandrel one end projects from decelerator protecgulum front end and forms protuberance, and described end cap button
It is combined on described protuberance.
9. hand pulling type deceleration projection screen according to claim 7 is it is characterised in that the described assembly that pulls includes and described curtain
Stiffener that cloth end connects, by the trombone slide lid of stiffener card lower trombone slide in the inner and the lower trombone slide two ends of capping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620704104.5U CN205937757U (en) | 2016-07-05 | 2016-07-05 | Hand -pulling type speed reduction projection curtain and reduction gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620704104.5U CN205937757U (en) | 2016-07-05 | 2016-07-05 | Hand -pulling type speed reduction projection curtain and reduction gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205937757U true CN205937757U (en) | 2017-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620704104.5U Active CN205937757U (en) | 2016-07-05 | 2016-07-05 | Hand -pulling type speed reduction projection curtain and reduction gear |
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| Country | Link |
|---|---|
| CN (1) | CN205937757U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488320A (en) * | 2018-04-04 | 2018-09-04 | 广州市雄云视听设备有限公司 | A kind of mute screen of dynamoelectric projection of hiding ceiling type |
| CN108873591A (en) * | 2018-08-06 | 2018-11-23 | 广州市雄瑞投影幕制造有限公司 | A kind of manual projection curtain of achievable curtain deceleration backrush |
| TWI655382B (en) * | 2017-09-29 | 2019-04-01 | 晟昌機電股份有限公司 | Quickly assemble high pressure oil seal structure |
-
2016
- 2016-07-05 CN CN201620704104.5U patent/CN205937757U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI655382B (en) * | 2017-09-29 | 2019-04-01 | 晟昌機電股份有限公司 | Quickly assemble high pressure oil seal structure |
| CN108488320A (en) * | 2018-04-04 | 2018-09-04 | 广州市雄云视听设备有限公司 | A kind of mute screen of dynamoelectric projection of hiding ceiling type |
| CN108873591A (en) * | 2018-08-06 | 2018-11-23 | 广州市雄瑞投影幕制造有限公司 | A kind of manual projection curtain of achievable curtain deceleration backrush |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |