CN103968011A - Stepless locating mechanism and locating for descent control device and back of seat - Google Patents
Stepless locating mechanism and locating for descent control device and back of seat Download PDFInfo
- Publication number
- CN103968011A CN103968011A CN201310698762.9A CN201310698762A CN103968011A CN 103968011 A CN103968011 A CN 103968011A CN 201310698762 A CN201310698762 A CN 201310698762A CN 103968011 A CN103968011 A CN 103968011A
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- China
- Prior art keywords
- gear
- worm
- worm screw
- synchromesh
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/06—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion with worm and worm-wheel or gears essentially having helical or herring-bone teeth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
- F16H59/0278—Constructional features of the selector lever, e.g. grip parts, mounting or manufacturing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a stepless locating mechanism. A pair of transmission gears is additionally arranged on a worm gear shaft and a worm shaft, and the worm gear and worm transmission and the gear transmission can be switched through a switching device. In the gear transmission process, a locating position can be selected freely, and in the worm gear and worm transmission process, locating is carried out after a position is selected. In addition, if a worm can perform axial sliding on the worm shaft and is ejected and pressed against the rotating direction of a worm gear through a spring, the worm gear can rotate only when the torque on the worm gear is enlarged enough to offset the spring pressure and until the worm is driven by a worm gear synchronous gear. The stepless locating mechanism is an output mechanism with constant torque and can serve as a descent control device.
Description
One, technical field:
The present invention relates to a kind of mechanically engaging device, especially relevant with positioning work piece.
Two, background technique:
Positioning means has multiple, roughly has three classes: the first kind is to utilize frictional force to position, and conventionally adopts elastic component, and as with rubber or spring, countershaft applies warp-wise or axial elastic pressure, and countershaft carries out friction catch.But this class frictional force location, not only moment is less, locates unstablely, has slip, and frequently uses, and friction material is wear smooth very easily, and working life is shorter.In practice, in order to strengthen friction torque, also often adopting the warp-wise of screw countershaft to tighten exerts pressure, because pressure is larger, thereby the frictional force producing is also larger, but due to screw repeatedly countershaft exert pressure, can in rotating shaft, leave indenture, screw top also can become because repeatedly exerting pressure smoothly, and it is accurate that impact is located; Equations of The Second Kind is in the preformed hole with insertion rotating shafts such as steel ball, steel pins, to realize location, but this is a kind of level location that has, and does not belong to stepless scope; The 3rd class is to adopt hydraulic machine to position, and mainly uses these hydrodynamic units such as connecting rod, piston to position, and this class device can be realized stepless location, but because accuracy of manufacturing is high, mechanism is complicated, not only expensive, and maintenance cost is also very high.
Three, summary of the invention:
Task of the present invention is to provide a kind of mechanical device that carries out positioned at arbitrary angles.
In order to complete above-mentioned task, solution of the present invention is: installing on the worm-wheel shaft and worm shaft of worm gear and worm screw, the a pair of gear pair identical with this worm gear transmission ratio is installed side by side again, synchronize with worm and gear worm-wheel shaft and worm shaft are carried out to transmission, and make the arbitrary gear in gear pair, can on worm-wheel shaft or worm shaft, do certain circumferentially slip of angle, the dual transmission device that this is comprised of worm couple and gear pair, can carry out the mutual switching of worm and gear auxiliary driving and gear pair transmission, loosening during transmission between location while realizing worm screw to worm gear locking and gear pair.
Mutual switching between worm drive and gear transmission, it can be not only a progressive process, and can in the process of carrying out, be deadlocked, thereby make this device can be under half jointing state, long time running, as carry out autotomying of slow the sending (descent control device) of certain resistance or super moment of torsion etc., its application area is comparatively extensive.
Realize the device that worm drive and gear transmission are switched, the present invention is called COMM communication, because COMM communication only needs to allow a certain gear (or worm gear too) slightly turn over an angle with respect to worm gear (or worm screw) axle of its installation, make the rotation of worm screw not catch up with worm gear locking is occurred its required rotating speed to.Obviously, such device has multiple, and not only mechanical structure has various ways, and can use the mode of hydraulic pressure and electromagnetic force, so the present invention cannot describe in detail one by one.
Four, accompanying drawing explanation:
Fig. 1 is worm couple in stepless positioning means and the working principle schematic diagram of gear pair Synchronous Transmission.
Fig. 2 is provided with driving gear between worm gear synchromesh gear and worm screw synchromesh gear, and with the working principle schematic diagram of worm and gear Synchronous Transmission.
Fig. 3 is two embodiments of the present invention: two kinds of different COMM communication are arranged on two stepless positioning means schematic diagram on stationary axle.
Fig. 4 is another two embodiments of the present invention: different COMM communication are arranged on two stepless positioning means schematic diagram on rotatingshaft.
Fig. 5 is the fifth embodiment of the present invention: worm screw is the stepless positioning means schematic diagram that axial movable worm screw the spring of take are COMM communication.
Fig. 6 is the sixth embodiment of the present invention, and worm screw is axial movable worm screw the stepless positioning means schematic diagram that spring and shift fork, shifting fork disc be COMM communication of take.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Five, embodiment:
Fig. 1 is worm couple in stepless positioning means of the present invention and the working principle schematic diagram of gear pair Synchronous Transmission.Worm gear in figure (1) is installed on worm-wheel shaft (3) together with worm gear synchromesh gear (5), worm screw (2) is installed on worm shaft (4) together with worm screw synchromesh gear (6), worm gear (1) and worm screw (2) engagement, worm gear synchromesh gear (5) and worm screw synchromesh gear (6) engagement, and make Worm Wheel System secondary identical with the velocity ratio of gear driving pair.Therefore for this mechanism, power not only can be transmitted to worm-wheel shaft (3) by worm shaft (4), and power can also be by worm-wheel shaft (3) to worm shaft (4) transmission, because the worm gear synchromesh gear (5) on worm-wheel shaft (3) can be by transmission of power to worm screw synchromesh gear (6).
In fact, said mechanism can be regarded as completely, gear pair driving mechanism between worm gear synchromesh gear (5) and worm screw synchromesh gear (6), and worm gear (1) is just followed gear rotation and rotates with worm screw (2), if therefore accuracy of manufacturing is higher, active force between worm gear (1) and worm screw (2) can be very little, not even contact.
Obviously, if the power in above-mentioned driving mechanism is to be transmitted to worm shaft (4) by worm-wheel shaft (3), and a certain gear in gear transmission has occurred again loosening in sense of rotation, make gear rotational hysteresis in the required rotation of worm screw (2), worm gear (1) can be stuck because of not catching up with by worm screw (2) of worm screw (2), and worm gear (1) is located by worm screw (2).Visible said mechanism, when gear transmission is normal, shows as the characteristic of gear pair transmission, and when a certain gear turns over an angle with respect to its installation shaft, shows as the drive characteristic of worm and gear.Therefore the present invention has designed one and both can make gear turn over an angle with respect to its installation shaft, can make again gear get back to the device of original position, the present invention be called COMM communication (7) (refer to Fig. 3 and after.) COMM communication (7) can make said mechanism carry out the switching of worm and gear auxiliary driving and gear pair transmission.
Due to manufacture, the worm screw synchromesh gear diameter here can be very little, and difficulty is larger, and the diameter of worm gear synchromesh gear must be larger, the volume of mechanism is increased, because only in this way, worm screw synchromesh gear can equate with the velocity ratio of worm screw, worm gear with the velocity ratio of worm gear synchromesh gear.Worm shaft is in fact without the rotating center of worm gear synchromesh gear in addition, therefore can significantly improve the processing cost of gear, although can worm shaft (4) be converted into two-section with universal joint etc., make the installation shaft of worm screw synchromesh gear through the rotating center of worm gear synchromesh gear, but because mechanism is complicated, and volume still fails to reduce, thereby cost is larger.The present invention, between worm gear synchromesh gear (5) and worm screw synchromesh gear (6), has installed a pair of driving gear for this reason, and in order to reduce volume and to reduce manufacture difficulty, Fig. 2 is such a mechanism.
As Fig. 2, worm gear synchromesh gear (5) in figure meshes with the main drive gear (8) on transmission shaft (10), and on worm screw synchromesh gear (6) and transmission shaft (10) from driving gear (9) engagement, and make still to be equated with the velocity ratio of worm screw (2) with worm gear (1) by the accumulative total velocity ratio of worm gear synchromesh gear (5), main drive gear (8), the gear transmission chain that forms from driving gear (9) and worm screw synchromesh gear (6).
As Fig. 3, Fig. 3 is fixing stepless location (angle) mechanisms of two worm-wheel shafts (3), generally can allow worm gear (1) and worm-wheel shaft (3) static, as the stepless location of the chair back, worm gear (1) or worm-wheel shaft (3) can be fixed on to chair with it (because luffing angle is little, can consider as long as half worm gear), and by remaining worm screw (2), worm shaft (4), transmission shaft (10) and driving gear etc. are installed on the chair back, follow chair back motion, Fig. 3-A is exactly this positioning means, COMM communication in figure (7) is by handle (11), turning round axle (12) and connecting key (14) forms, if will lift (can establish fixing spacing above) on handle (11), gear pair transmission is just in time synchronizeed with worm and gear auxiliary driving, now the chair back can be freely movable, selected angle.After the selected angle of the chair back, handle (11) presses to origin-location, and now, the worm screw on the chair back (2) and chair with it fixing worm gear (1) are stuck, and location has occurred for the chair back and chair body.
Fig. 3-B is also a worm gear (1) and the fixing stepless positioning means schematic diagram of worm-wheel shaft (3), different from Fig. 3-A is, COMM communication (7) is different, the COMM communication in 3-B (7) by handle (11), turn round axle (12) and twisting gear (13) form.If when handle (11) is pulled outwardly to a position, worm gear synchromesh gear (5) turns over an angle with respect to worm gear (1), gear pair transmission is just in time synchronizeed with worm gear pair transmission, now the chair back can be freely movable, after the chair back chooses angle, handle (11) is inwardly got back to origin-location, now because returning an angle, worm gear synchromesh gear (5) there is hysteresis, cause the rotating speed of worm screw (2) do not catch up with the needs of worm gear (1) and worm gear (1) is blocked, there is location in the chair back.
Fig. 4 is two embodiments of the present invention, in figure, there are two different COMM communication (7), COMM communication in Fig. 4-A is by shift fork (15), shifting fork disc (16), pull bar (17) and wedge shape slide key (18) form, when shift fork (15) left pushing drawing rod (17) wedge shape slide key (18) is inserted completely from the reserved keyhole of driving gear (9), make to be just in time fixed on transmission shaft (10) from driving gear (9), now positioning means just in time can freely rotate, when shift fork (15) pulls pull bar (17) to move right, wedge shape slide key (18) part is drawn out from the reserved keyhole of driving gear (9), cause occurring from driving gear (9) loosening, gear transmission is lagged behind, thereby make the rotational hysteresis of worm screw (2), worm gear (1) is pinned by worm screw (2).
COMM communication in Fig. 4-B (7) by shift fork (15), shifting fork disc (16), turn round axle (12), connecting key (14), locating stud (19) and ball screw (20) and form.The same with Fig. 3-A with turning round axle (12) and connecting key (14) turns over an angle by gear, different is that Fig. 3-A is on stationary axle, as long as with handle (11) push-and-pull.Fig. 4-B is on the axle rotating, therefore need shift fork (15) and shifting fork disc (16), and with locating stud (19) positioning shift fork dish (16), the inner chamber of using again ball screw (20) to act on shifting fork disc (16) makes to turn round axle (12) and rotates, and reaches the object of reversing from driving gear (9).
Fig. 5 is the 5th embodiment of the present invention, different from precedent is, worm screw (2) is no longer fixed on worm shaft (4), but can do moving axially of certain distance with respect to worm shaft (4), the present invention is called axial movable worm screw (22), the COMM communication is here a spring (21), when the moment of torsion on worm gear (1) is strengthened gradually as the direction of arrow on it, the axial movable worm screw (22) of blocking worm gear (1) is forced to overcome the thrust of spring (21), along worm shaft (4) segment distance that moves right, now worm gear synchromesh gear (5) also rotates with worm gear (1), driven main drive gear (8) and from driving gear (9), worm screw synchromesh gear (6) is rotated, thereby drive axial movable worm screw (22) also to rotate, worm gear (1) also successfully rotates.Therefore this COMM communication (7) is that moment of torsion with worm gear (1) increases and automatically switches, and the size of this moment of torsion is decided by the elastic force of spring.
Fig. 6 is on the basis of Fig. 5, and shift fork (15) and a shifting fork disc (16) that can change spring pressure has been installed in COMM communication (7).When the moment of torsion on worm gear (1) increases as the direction of arrow, spring (21) can be compressed, now if worm gear (1) adds high pulling torque again can rotate, as long as shifting fork disc (16) is promoted left with shift fork (15), spring (21) is compressed left, to increase the thrust of spring (21) to axial movable worm screw (22), to force worm gear (1) to only have, improve again moment of torsion and can rotate.Therefore the present embodiment can be used as the released movement under certain moment of torsion, as descent control device etc.
Because the effect of COMM communication is to set up or destroy the Synchronous Transmission between worm gear synchromesh gear (5) and worm screw synchromesh gear (6) and worm gear (1) and worm screw (2), therefore above-mentioned COMM communication is all applicable to Fig. 1 and Fig. 2, COMM communication has multiple simultaneously, can also lift except above-mentioned points many, COMM communication can also be completed with pneumatic fluid power etc., COMM communication can be arranged on the arbitrary transmission position between worm-wheel shaft (3) and worm shaft (4) simultaneously, difference because of installation position, have again different structures, so the present invention cannot lift to the greatest extent.
Claims (8)
1. a stepless positioning means that comprises worm gear (1), worm screw (2), worm-wheel shaft (3) and worm shaft (4), is characterized in that: it is also constituted jointly by worm gear synchromesh gear (5), worm screw synchromesh gear (6) and COMM communication (7); Worm gear (1) is installed on worm-wheel shaft (3) in the lump with worm gear synchromesh gear (5), worm screw (2) is installed on worm shaft (4) in the lump with worm screw synchromesh gear (6), worm gear (1) and worm screw (2) engagement, worm gear synchromesh gear (5) and worm screw synchromesh gear (6) engagement, and make worm gear (1) and the velocity ratio of worm screw (2) equal the velocity ratio of worm gear synchromesh gear (5) and worm screw synchromesh gear (6); COMM communication (7) is installed between worm-wheel shaft (3) and the transmission of worm shaft (4), the Worm Wheel System between the gear transmission between worm gear synchromesh gear (5) and worm screw synchromesh gear (6) and worm gear (1) and worm screw (2) can be switched mutually.
2. stepless positioning means according to claim 1, is characterized in that: main drive gear (8) is installed, from driving gear (9) and transmission shaft (10) between worm gear synchromesh gear (5) and worm screw synchromesh gear (6); Worm gear synchromesh gear (5) and main drive gear (8) engagement, worm screw synchromesh gear (6) with from driving gear (9), mesh, main drive gear (8) and being all installed on transmission shaft (10) from driving gear (9), and make to begin from worm gear synchromesh gear (5), through main drive gear (8) and from driving gear (9) to worm screw synchromesh gear (6) end accumulative total gear ratio, still equal the velocity ratio between worm gear (1) and worm screw (2).
3. stepless positioning means according to claim 1 and 2, is characterized in that: COMM communication (7) by handle (11), turn round axle (12) and twisting gear (13) forms.
4. stepless positioning means according to claim 1 and 2, is characterized in that: COMM communication (7) by handle (11), turn round axle (12) and connecting key (14) forms.
5. stepless positioning means according to claim 1 and 2, is characterized in that: COMM communication (7) consists of shift fork (15), shifting fork disc (16), pull bar (17) and wedge shape slide key (18).
6. stepless positioning means according to claim 1 and 2, is characterized in that: COMM communication (7) by shift fork (15), shifting fork disc (16), locating stud (19), ball screw (20), turn round axle (12) connecting key (14) and form.
7. positioning means according to claim 1 and 2, is characterized in that: worm screw (2) becomes as axial movable worm screw (22) in axial sliding, and COMM communication (7) consists of spring (21).
8. positioning means according to claim 1 and 2, it is characterized in that: worm screw (2) becomes as axial movable worm screw (22) in axial sliding, and COMM communication (7) consists of in the lump spring (21), shift fork (15) and shifting fork disc (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310698762.9A CN103968011B (en) | 2013-12-10 | 2013-12-10 | A kind of location of stepless detent mechanism and descending lifeline and the chair back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310698762.9A CN103968011B (en) | 2013-12-10 | 2013-12-10 | A kind of location of stepless detent mechanism and descending lifeline and the chair back |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103968011A true CN103968011A (en) | 2014-08-06 |
| CN103968011B CN103968011B (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310698762.9A Active CN103968011B (en) | 2013-12-10 | 2013-12-10 | A kind of location of stepless detent mechanism and descending lifeline and the chair back |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103968011B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105398884A (en) * | 2015-11-27 | 2016-03-16 | 苏州圣恳自动化科技有限公司 | Three-way guide wheel adjusting mechanism |
| CN106246810A (en) * | 2016-07-28 | 2016-12-21 | 韦品贵 | Worm planet decelerator |
| CN110271917A (en) * | 2019-06-27 | 2019-09-24 | 京东方科技集团股份有限公司 | Winding device and flexible display device |
| CN110485111A (en) * | 2019-09-29 | 2019-11-22 | 江苏泰锋机械制造有限公司 | Isolated washing machine inner cylinder with locking buckle structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2288729A (en) * | 1994-04-30 | 1995-11-01 | Rentrop Hubbert & Wagner | Adjustment of a vehicle seat backrest |
| US5950765A (en) * | 1998-02-25 | 1999-09-14 | Eaton Corporation | Two stage motorized actuator |
| CN2656204Y (en) * | 2003-07-20 | 2004-11-17 | 黄继林 | Electric angle regulator for car seat |
| CN2700167Y (en) * | 2004-04-05 | 2005-05-18 | 浙江胜华波汽车电器有限公司 | Motor gear reducing arrangement for adjusting automobile seat back |
| CN101617899A (en) * | 2009-08-03 | 2010-01-06 | 常州昊邦汽车零部件有限公司 | Waist supporting device of seat backrest |
-
2013
- 2013-12-10 CN CN201310698762.9A patent/CN103968011B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2288729A (en) * | 1994-04-30 | 1995-11-01 | Rentrop Hubbert & Wagner | Adjustment of a vehicle seat backrest |
| US5950765A (en) * | 1998-02-25 | 1999-09-14 | Eaton Corporation | Two stage motorized actuator |
| CN2656204Y (en) * | 2003-07-20 | 2004-11-17 | 黄继林 | Electric angle regulator for car seat |
| CN2700167Y (en) * | 2004-04-05 | 2005-05-18 | 浙江胜华波汽车电器有限公司 | Motor gear reducing arrangement for adjusting automobile seat back |
| CN101617899A (en) * | 2009-08-03 | 2010-01-06 | 常州昊邦汽车零部件有限公司 | Waist supporting device of seat backrest |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105398884A (en) * | 2015-11-27 | 2016-03-16 | 苏州圣恳自动化科技有限公司 | Three-way guide wheel adjusting mechanism |
| CN106246810A (en) * | 2016-07-28 | 2016-12-21 | 韦品贵 | Worm planet decelerator |
| CN110271917A (en) * | 2019-06-27 | 2019-09-24 | 京东方科技集团股份有限公司 | Winding device and flexible display device |
| CN110271917B (en) * | 2019-06-27 | 2020-08-04 | 京东方科技集团股份有限公司 | Winding device and flexible display equipment |
| CN110485111A (en) * | 2019-09-29 | 2019-11-22 | 江苏泰锋机械制造有限公司 | Isolated washing machine inner cylinder with locking buckle structure |
| CN110485111B (en) * | 2019-09-29 | 2024-02-20 | 江苏泰锋机械制造有限公司 | Isolation type washing machine inner cylinder with anti-loose locking structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103968011B (en) | 2016-07-06 |
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