CN106487157B - A kind of track in executing agency - Google Patents
A kind of track in executing agency Download PDFInfo
- Publication number
- CN106487157B CN106487157B CN201510552235.6A CN201510552235A CN106487157B CN 106487157 B CN106487157 B CN 106487157B CN 201510552235 A CN201510552235 A CN 201510552235A CN 106487157 B CN106487157 B CN 106487157B
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- China
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- speed reducer
- harmonic speed
- ratchet
- transmission gear
- camera lens
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Abstract
The invention belongs to electrical servo system technical fields, and in particular to a kind of track in executing agency.Cabin, rack gear are installed including transmission gear, ratchet, pawl, installation end cap, harmonic speed reducer shell, servo motor, harmonic speed reducer output shaft, camera lens；Using harmonic speed reducer as deceleration mechanism, servo motor is mounted on harmonic speed reducer shell；Ratchet and transmission gear are successively installed between installation end cap and harmonic speed reducer output shaft outermost end；Rack gear is set on the joint face of camera lens installation cabin and track in executing agency, rack gear is engaged with transmission gear；Servo motor drives harmonic speed reducer to rotate when work, and harmonic speed reducer output shaft drives the ratchet being fastened thereon and transmission gear while rotating, and transmission gear pushes rack gear, and camera lens installation cabin is released；When camera lens is completely pushed out of, servo motor power-off, pawl slides to ratchet gullet base when pushing ratchet automatically, prevents camera lens from installing cabin and reversely retracts.
Description
Technical field
The invention belongs to electrical servo system technical fields, and in particular to a kind of track in executing agency.
Background technique
Guided missile is in flight course, and when needing that target is imaged, lens assembly can be stretched out inside body.Camera lens
After device pop-up, to prevent it from blowing back deck store by aerodynamic force, the function of anti-reverse is needed.When lens assembly is fully extended,
Have following three kinds of schemes available: (1) by controller by camera lens cabin servo in the position；(2) motor of retarder uses
The servo motor of band brake function, it is by control brake that camera lens cabin is fixed in the position；(3) ratchet mechanism is used, mirror is worked as
When head cabin reaches designated position, the pawl by ratchet mechanism prevents camera lens cabin from falling after rise.
Scheme one is significantly simpler to implement, but when external pneumatic load excessive, motor rotation blockage, controller internal current
The excessive electronic component that may lead is burnt, and that the motor feels hot is serious；
Scheme two needs the motor using band brake, and this motor is compared with the generic servo motor of same type, length
Direction size is larger, heavier-weight, and controls to get up to be more troublesome；
Scheme three needs to use ratchet mechanism, complex in design, but it uses mechanical structure to prevent from reversing, reliably
Property is higher, and hysterisis error is controllable, still, is disclosed there is presently no the particular technique about scheme three.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of track in executing agency for the technical problem encountered,
Realize the purpose for quickly propelling lens mechanism and reverse self-locking.
In order to realize the purpose, the technical solution adopted by the present invention is that:
A kind of track in executing agency, including transmission gear, ratchet, pawl, installation end cap, harmonic speed reducer shell,
Servo motor, harmonic speed reducer output shaft, camera lens install cabin, rack gear；
Using harmonic speed reducer as deceleration mechanism, servo motor is mounted on harmonic speed reducer shell, in harmonic reduction
The side setting installation end cap of device shell, installation end cap and harmonic speed reducer shell are fastened by screw；
Convex structure is set in the installation end side of covering, pawl is installed in convex structure；
Ratchet and transmission gear, ratchet and biography are successively installed between installation end cap and harmonic speed reducer output shaft outermost end
Moving gear is fastened by key, and by beating pin on transmission gear, keeps ratchet, transmission gear and harmonic speed reducer output shaft tight
Gu；
Rack gear is set on the joint face of camera lens installation cabin and track in executing agency, rack gear is engaged with transmission gear；
Servo motor drives harmonic speed reducer to rotate when work, and the drive of harmonic speed reducer output shaft is fastened thereon
Ratchet and transmission gear rotate simultaneously, transmission gear push rack gear, by camera lens installation cabin release；
When camera lens is completely pushed out of, servo motor power-off, pawl slides to ratchet gullet base when pushing ratchet automatically,
It prevents camera lens that cabin is installed reversely to retract.
Further, a kind of track in executing agency as described above, the pushing speed ν of track in executing agency=
8cm/s, backlash stroke are maximum 0.25mm；The transmission gear reference radius being engaged with rack is R, and delivery device reduction ratio is
I, the rated speed of servo motor are ω, determine transmission gear reference radius R according to the following formula:
According to the requirement of backlash stroke, the number of teeth n of ratchet is determined according to the following formula:
Further, a kind of track in executing agency as described above, the rated speed ω of servo motor are greater than
7500r/min, delivery device reduction ratio i=300, transmission gear reference radius R are greater than 31mm, number of teeth n >=144 of ratchet.
The beneficial effects of the present invention are, it is compact-sized, it is easy to process, it is easy to assembly, and have the function of reverse self-locking.
Detailed description of the invention
Fig. 1 is the threedimensional model of harmonic speed reducer.
Fig. 2 is the schematic diagram in harmonic speed reducer push camera lens cabin.
In figure: 1 transmission gear, 2 ratchets, 3 pawls, 4 installation end caps, 5 harmonic speed reducer shells, 6 servo motors, 7 harmonic waves
Reducer output shaft, 8 camera lenses install cabin, 9 rack gears.
Specific embodiment
Technical solution of the present invention is described in detail in the following with reference to the drawings and specific embodiments.
A kind of track in executing agency of the present invention is by transmission gear 1, ratchet 2, pawl 3, installation end cap 4, harmonic reduction
The compositions such as device shell 5, servo motor 6, harmonic speed reducer output shaft 7, camera lens installation cabin 8, rack gear 9.Made using harmonic speed reducer
For deceleration mechanism, servo motor 6 is mounted on harmonic speed reducer shell 5, and installation end is arranged in the side of harmonic speed reducer shell 5
Lid 4, installation end cap 4 and harmonic speed reducer shell 5 are fastened by screw；Convex structure is set above installation end cap 4, convex
It rises and pawl 3 is installed in shape structure；Ratchet 2 is successively installed between installation end cap 4 and 7 outermost end of harmonic speed reducer output shaft and is passed
Moving gear 1, ratchet 2 and transmission gear 1 are fastened by key, and by beating pin on transmission gear 1, make ratchet 2, transmission gear 1
It is fastened with harmonic speed reducer output shaft 7；Rack gear 9, tooth are set on the joint face of camera lens installation cabin 8 and track in executing agency
Item 9 is engaged with transmission gear 1；Servo motor 6 drives harmonic speed reducer to rotate when work, harmonic speed reducer output shaft 7
It drives the ratchet 2 being fastened thereon and transmission gear 1 while rotating, transmission gear 1 pushes rack gear 9, and camera lens installation cabin 8 is pushed away
Out；When camera lens is completely pushed out of, servo motor 6 is powered off, and pawl 3 slides to 2 gullet base of ratchet when pushing ratchet 2 automatically,
It prevents camera lens that cabin is installed reversely to retract.
In the present embodiment, pushing speed ν=8cm/s of track in executing agency, backlash stroke are maximum 0.25mm；
The reference radius of the transmission gear 1 engaged with rack gear 9 is R, and delivery device reduction ratio is i, and the rated speed of servo motor 6 is
ω determines 1 reference radius R of transmission gear according to the following formula:
According to the requirement of backlash stroke, the number of teeth n of ratchet 2 is determined according to the following formula:
The rated speed ω of servo motor 6 is greater than 7500r/min, delivery device reduction ratio i=300, and transmission gear 1 indexes
Radius of circle R is greater than 31mm, number of teeth n >=144 of ratchet 2.
A kind of track in executing agency as described above, the ratchet mechanism used is a kind of anti-reverse-rotation device, pawl 3
When pushing ratchet 2, pawl 3 can slide to 2 gullet base of ratchet automatically at work and will not slip.
Claims (2)
1. a kind of track in executing agency, it is characterised in that: subtract including transmission gear, ratchet, pawl, installation end cap, harmonic wave
Fast device shell, servo motor, harmonic speed reducer output shaft, camera lens install cabin, rack gear；
Using harmonic speed reducer as deceleration mechanism, servo motor is mounted on harmonic speed reducer shell, in harmonic speed reducer shell
The side setting installation end cap of body, installation end cap and harmonic speed reducer shell are fastened by screw；
Convex structure is set in the installation end side of covering, pawl is installed in convex structure；
Ratchet and transmission gear, ratchet and driving cog are successively installed between installation end cap and harmonic speed reducer output shaft outermost end
Wheel is fastened by key, and by beating pin on transmission gear, fastens ratchet, transmission gear and harmonic speed reducer output shaft；
Rack gear is set on the joint face of camera lens installation cabin and track in executing agency, rack gear is engaged with transmission gear；
Servo motor drives harmonic speed reducer to rotate when work, and harmonic speed reducer output shaft drives the spine being fastened thereon
Wheel and transmission gear rotate simultaneously, and transmission gear pushes rack gear, and camera lens installation cabin is released；
When camera lens is completely pushed out of, servo motor power-off, pawl slides to ratchet gullet base when pushing ratchet automatically, prevents
Camera lens installation cabin reversely retracts.
2. a kind of track in executing agency as described in claim 1, it is characterised in that: the push of track in executing agency
Speed ν=8cm/s, backlash stroke are maximum 0.25mm；The transmission gear reference radius being engaged with rack is R, delivery device
Reduction ratio is i, and the rated speed of servo motor is ω, determines transmission gear reference radius R according to the following formula:
According to the requirement of backlash stroke, according to formulaDetermine the number of teeth n of ratchet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552235.6A CN106487157B (en) | 2015-09-01 | 2015-09-01 | A kind of track in executing agency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552235.6A CN106487157B (en) | 2015-09-01 | 2015-09-01 | A kind of track in executing agency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106487157A CN106487157A (en) | 2017-03-08 |
| CN106487157B true CN106487157B (en) | 2019-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510552235.6A Active CN106487157B (en) | 2015-09-01 | 2015-09-01 | A kind of track in executing agency |
Country Status (1)
| Country | Link |
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| CN (1) | CN106487157B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6559569B2 (en) * | 2000-04-18 | 2003-05-06 | Canon Kabushiki Kaisha | Motor device |
| JP2007225098A (en) * | 2006-02-27 | 2007-09-06 | Seiko Precision Inc | Driving device |
| CN101299128A (en) * | 2008-06-12 | 2008-11-05 | 中国船舶重工集团公司第七一七研究所 | Electric control lens cap with self-locking function |
| CN103754317A (en) * | 2014-01-17 | 2014-04-30 | 南京信息工程大学 | Driving mechanism of moped scooter |
| CN203606548U (en) * | 2013-10-30 | 2014-05-21 | 湖南长步道光学科技有限公司 | A lens locking device |
-
2015
- 2015-09-01 CN CN201510552235.6A patent/CN106487157B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6559569B2 (en) * | 2000-04-18 | 2003-05-06 | Canon Kabushiki Kaisha | Motor device |
| JP2007225098A (en) * | 2006-02-27 | 2007-09-06 | Seiko Precision Inc | Driving device |
| CN101299128A (en) * | 2008-06-12 | 2008-11-05 | 中国船舶重工集团公司第七一七研究所 | Electric control lens cap with self-locking function |
| CN203606548U (en) * | 2013-10-30 | 2014-05-21 | 湖南长步道光学科技有限公司 | A lens locking device |
| CN103754317A (en) * | 2014-01-17 | 2014-04-30 | 南京信息工程大学 | Driving mechanism of moped scooter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106487157A (en) | 2017-03-08 |
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