CN1425861A - Driving mechanism capable of eliminating backlash - Google Patents
Driving mechanism capable of eliminating backlash Download PDFInfo
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- CN1425861A CN1425861A CN 02102594 CN02102594A CN1425861A CN 1425861 A CN1425861 A CN 1425861A CN 02102594 CN02102594 CN 02102594 CN 02102594 A CN02102594 A CN 02102594A CN 1425861 A CN1425861 A CN 1425861A
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- tooth
- driving
- actuator
- driving mechanism
- driven tooth
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- 230000007246 mechanism Effects 0.000 title claims abstract description 34
- 230000009471 action Effects 0.000 claims description 19
- 230000008030 elimination Effects 0.000 claims description 19
- 238000003379 elimination reaction Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 description 15
- 239000011435 rock Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002964 excitative effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The driving mechanism capable of eliminating backlash has one actuator connected between the driving part and the driven gear meshes with one driven gear to accept the driving force from the driving gear. Owing to the actuator, normally the driving gear and the driven gear mesh closely to eliminate the backlash; and during driving, the pressure between the driving gear and the driven gear is reduced to reduce the friction.
Description
Technical field
The present invention relates to a kind of driving mechanism, be applied to the device of profile of tooth, particularly relate to a kind of driving mechanism of eliminating backlash in conjunction with transmission.
Background technique
In general system or device, unavoidably need the transmission of power, prosperity along with science and technology, the accurate day by day and accurately control of the requirement that the device of transmission is also relative, and that the mode of power transmission has is quite multiple, wherein meets most present requirement with profile of tooth in conjunction with the mode of transmission, and profile of tooth has quite multiple in conjunction with the device of transmission, the combination of gear, driving screw, engaging tooth, tooth bar or the like is for example arranged, and all is to mutually combine transferring power by the profile of tooth thing.
And profile of tooth is backlash (backlash) in conjunction with the shortcoming of driving mechanism maximum; Backlash is exactly the gap between tooth and the tooth as its name suggests, causes the reason of backlash, may come from outside manufacturing tolerances, the abrasion, also may design for the frictional force that reduces transmission.But for more and more accurate optical system, the existence of backlash but can cause error on the control location and unnecessary vibrations.
With optical disc drive system, CD drive is to utilize the power of driving screw drive motor, and be engaged on the driving screw by an engaging tooth, and the drive optical read/write head moves, because optical read/write head is when seeking rail, need location fast and accurately, so do not admit of the existence of backlash, so can on engaging tooth, apply a precompressed elastic force usually, make that the cooperation between driving screw and the engaging tooth is tightr, still, after applying precompressed elastic force, but increased the frictional force between engaging tooth and driving screw, made transmission difficulty and transmission speed reduce, and can't locate fast; On the other hand,, but can't effectively eliminate backlash, cause optical read/write head to rock, even back and forth the time, can shake, influence reading of data if the precompressed elastic force that applies is not enough.Under this situation of facing a difficult choice, preceding case has proposed considerable settling mode, but is not to control too difficulty, complicated, is exactly that the result is desirable not as expection, and can't provide a kind of effectively and meet the settling mode of current demand.
Summary of the invention
The objective of the invention is to provides a kind of driving mechanism of eliminating backlash for addressing the above problem, and the frictional force in the time of can eliminating backlash and lower transmission is simultaneously, also quite easy in the control.
Above-mentioned purpose of the present invention is achieved in that a kind of driving mechanism of eliminating backlash, is used for transmission one and treats driving component, and wherein said driving mechanism includes:
One driving tooth;
One driver element is connected in described driving tooth, and described driving tooth power can be provided;
One driven tooth structure includes a driven tooth at least, and described driven tooth is engaged in described driving tooth excessively;
One actuator is installed on the described driven tooth structure, can change the pressure between described driving tooth and described driven tooth; And
One controller is in order to described driver element of synchronization control and described actuator action.
The driving mechanism of elimination backlash of the present invention, wherein said controller is controlled described actuator action, when making normality, tight engagement between described driving tooth and described driven tooth, and driver element when action, described actuator action and make the pressure between described driving tooth and the described driven tooth reduce.
The driving mechanism of elimination backlash of the present invention, wherein said controller is controlled described actuator action, when making normality, described actuator action makes tight engagement between described driving tooth and described driven tooth, and driver element when action, described actuator recovers and makes the pressure between described driving tooth and the described driven tooth reduce.
The driving mechanism of elimination backlash of the present invention, wherein said driving tooth are a driving screw.
The driving mechanism of elimination backlash of the present invention, wherein said driving tooth are a gear.
The driving mechanism of elimination backlash of the present invention, wherein said driven tooth are a gear.
The driving mechanism of elimination backlash of the present invention, wherein said actuator are selected from one of them of combination that electromagnetic actuator, piezoelectric actuator, marmem and thermal distortion bimetal constituted.
The driving mechanism of elimination backlash of the present invention, wherein said driven tooth structure also includes a junction, is used to connect the described driving component for the treatment of.
The driving mechanism of elimination backlash of the present invention, wherein said actuator connect the described driving component for the treatment of in described driven tooth.
Driving mechanism according to elimination backlash of the present invention, include a driving tooth, a driven tooth structure, a driver element, an actuator and a controller, driving tooth is connected in driver element, can accept the power output of driver element, and the driven tooth structure is engaged in driving tooth by a driven tooth, and be subjected to the drive of driving tooth, and drive the driving component for the treatment of connected, and actuator is installed in the driven tooth structure, can change the pressure between driven tooth and driving tooth, controller is then in order to synchronization control driver element and actuator.
When normality is failure to actuate when driving mechanism, make tight engagement between driven tooth and driving tooth, make driven tooth, just make and treat that the certain location of driving component do not rock by actuator; When driving mechanism moves, by controller synchronization control driver element and actuator, make driver element action drives driving tooth, and by the pressure between actuator reduction driving tooth and the driven tooth, and reduce frictional force between driving tooth and the driven tooth, so can eliminate the backlash in when location, and the frictional force when reducing transmission.
And change pressure between driving tooth and the driven tooth, and be the micro-strain that produces by the action of actuator, reach the engagement degree that changes between driving tooth and the driven tooth.The control of actuator can be out of shape when normality, makes driving tooth and driven tooth keep tight engagement, and during the driver element action, controls actuator simultaneously by controller it is restored to the original state, and reduces the pressure between driving tooth and driven tooth; In addition the aspect also can maintain the original state when normality, makes driving tooth and driven tooth keep tight engagement, and during the driver element action, controls actuator simultaneously by controller and make its distortion, and the pressure between reduction driving tooth and driven tooth.
For making purpose of the present invention, structure characteristics and function thereof there are further understanding, are elaborated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the schematic representation of the driving mechanism of elimination backlash of the present invention;
Fig. 2 is the schematic representation of controller line of the present invention;
Fig. 3 is the schematic representation of controller signal of the present invention.
Embodiment
Driving mechanism according to elimination backlash of the present invention, include a driving tooth (drivinggear), one driven tooth (driven gear) structure, one driver element, one actuator and a controller, with the optical disc drive system is example, see also Fig. 1, include optical read/write head 10, slide bar 21,22, engaging tooth structure 30, driving screw 90, controller 50, motor driver 60, power amplifier 70 and stepper motor 80, stepper motor 80 is driver element, and the driving screw 90 of accepting stepper motor 80 power is exactly a driving tooth, the engaging tooth structure 30 that is meshed with driving screw 90 is exactly the driven tooth structure, and optical read/write head 10 is exactly to treat driving component.
Optical read/write head 10 is striden and is located at two slide bars 21,22, can be at slide bar 21, slide on 22, in order to optical disc sought rail and to read or write data, and driving screw 90 is installed on the stepper motor 80, can accept the rotating power of stepper motor 80, and engaging tooth structure 30 is engaged on the driving screw 90 by an engaging tooth 31, can accept the rotating power of driving screw 90, and do straight line motion, and can change pressure between engaging tooth 31 and the driving screw 90 by an actuator 40, and be connected in optical read/write head 10, and then drive optical read/write head 10 at slide bar 21 by a junction 32,22 slips.And controller 50 is by motor driver 60 and power amplifier 70 difference control step motor 80 and actuators 40.
With bipolarity (bipolar), the excitatory stepper motor 80 of two-phase, driving mode can be as shown in Figure 2, controller 50 produces a drive signal V by motor driver 60 output pulse signal φ 1 (A+), φ 2 (B+), φ 3 (A-), φ 4 (B-) and pass through power amplifier 70 simultaneously
0Be used for drive actuator 40, as shown in Figure 3, that is to say, utilize controller to come synchronization control stepper motor 80 and actuator 40.
Under the normality, keep the tight engagement state between engaging tooth 31 and the driving screw 90, make optical read/write head 10 location accurately and prevent that it from rocking, in the time will seeking rail and read data, by 50 control while of controller drive stepping motor 80 and actuator 40, by actuator 40 pressure of 90 of engaging tooth 31 and driving screws is reduced, and the frictional force during transmission also decreases, and stepper motor 80 drives driving screw 90 rotations, and make engaging tooth 31 do linear motion, reach the effect that optical read/write head 10 is sought rail.Behind the location, controller 50 same control step motor 80 and actuators 40 simultaneously make pressure recovery between engaging tooth 31 and the driving screw 90 present the state of tight engagement, make its location and do not rock.
And actuator 40 can adopt electromagnetic actuator, piezoelectric actuator, marmem and thermal distortion bimetal, utilize its small distortion to change the pressure of 90 of engaging tooth 31 and driving screws, can be that actuator 40 is remained stationary under the normality, and when driving, the pressure that actuator 40 distortion reduction engaging tooth 31 and driving screw are 90; Or actuator 40 distortion under the normality, and when driving, actuator 40 restores to the original state and reduces the pressure of 90 of engaging tooth 31 and driving screws.
And optical read/write head 10 also can directly be connected in the engaging tooth mechanism 30 by actuator 40, simultaneously, driven tooth and driving tooth are not defined as engaging tooth 31 and driving screw 90, can be that any profile of tooth bond can in conjunction with transmission, be gear, driving screw, tooth bar or the like for example, every profile of tooth bond that can produce backlash (backlash) all can.
The present invention is a kind of driving mechanism of eliminating backlash, be to utilize an actuator to change the mesh degree of driving tooth and driven tooth, just change the pressure between driving tooth and the driven tooth, when the controller control drive unit was moved, promptly the synchronization control actuator changed the pressure between driving tooth and driven tooth, when making transmission, both pressure reduce and are easy to transmission and increase transmission speed, and when location, both pressure recovery present tight engagement, make that treating that driving component is stable does not rock; Simultaneously, because be, and quite be easy to control by the mesh degree between actuator simple action change driving tooth and driven tooth.
The above only is the present invention's preferred embodiment wherein, is not to be used for limiting practical range of the present invention; Be that all equalizations of being done according to the present patent application claim change and modification, be all claim of the present invention and contain.
Claims (9)
1, a kind of driving mechanism of eliminating backlash is used for transmission one and treats driving component, it is characterized in that described driving mechanism includes:
One driving tooth;
One driver element is connected in described driving tooth, and described driving tooth power can be provided;
One driven tooth structure includes a driven tooth at least, and described driven tooth is engaged in described driving tooth excessively;
One actuator is installed on the described driven tooth structure, can change the pressure between described driving tooth and described driven tooth; And
One controller is in order to described driver element of synchronization control and described actuator action.
2, the driving mechanism of elimination backlash as claimed in claim 1, it is characterized in that, described controller is controlled described actuator action, when making normality, tight engagement between described driving tooth and described driven tooth, and driver element when action, described actuator action and make the pressure between described driving tooth and the described driven tooth reduce.
3, the driving mechanism of elimination backlash as claimed in claim 1, it is characterized in that, described controller is controlled described actuator action, when making normality, described actuator action makes tight engagement between described driving tooth and described driven tooth, and driver element when action, described actuator recovers and makes the pressure between described driving tooth and the described driven tooth reduce.
4, the driving mechanism of elimination backlash as claimed in claim 1 is characterized in that, described driving tooth is a driving screw.
5, the driving mechanism of elimination backlash as claimed in claim 1 is characterized in that, described driving tooth is a gear.
6, the driving mechanism of elimination backlash as claimed in claim 1 is characterized in that, described driven tooth is a gear.
7, the driving mechanism of elimination backlash as claimed in claim 1 is characterized in that, described actuator is selected from one of them of combination that electromagnetic actuator, piezoelectric actuator, marmem and thermal distortion bimetal constituted.
8, the driving mechanism of elimination backlash as claimed in claim 1 is characterized in that, described driven tooth structure also includes a junction, is used to connect the described driving component for the treatment of.
9, the driving mechanism of elimination backlash as claimed in claim 1 is characterized in that, described actuator connects the described driving component for the treatment of in described driven tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02102594 CN1425861A (en) | 2001-12-12 | 2002-01-24 | Driving mechanism capable of eliminating backlash |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01278075.8 | 2001-12-12 | ||
| CN01278075 | 2001-12-12 | ||
| CN 02102594 CN1425861A (en) | 2001-12-12 | 2002-01-24 | Driving mechanism capable of eliminating backlash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1425861A true CN1425861A (en) | 2003-06-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02102594 Pending CN1425861A (en) | 2001-12-12 | 2002-01-24 | Driving mechanism capable of eliminating backlash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1425861A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221498A (en) * | 2010-03-05 | 2011-10-19 | 诺信公司 | Bond strength testing apparatus with switchable backlash control |
| CN113983144A (en) * | 2021-09-24 | 2022-01-28 | 北京航空航天大学 | Space shafting becomes preloading mechanism based on SMA silk and spiral friction is vice |
-
2002
- 2002-01-24 CN CN 02102594 patent/CN1425861A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221498A (en) * | 2010-03-05 | 2011-10-19 | 诺信公司 | Bond strength testing apparatus with switchable backlash control |
| CN102221498B (en) * | 2010-03-05 | 2015-05-06 | 诺信公司 | Bond strength testing apparatus with switchable backlash control |
| US9170189B2 (en) | 2010-03-05 | 2015-10-27 | Nordson Corporation | Bond strength tester with switchable backlash control |
| CN113983144A (en) * | 2021-09-24 | 2022-01-28 | 北京航空航天大学 | Space shafting becomes preloading mechanism based on SMA silk and spiral friction is vice |
| CN113983144B (en) * | 2021-09-24 | 2023-08-08 | 北京航空航天大学 | Space shafting becomes preload mechanism based on SMA silk and spiral friction pair |
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