CN109946811A - A kind of double-view field switching mechanism of quick response - Google Patents
A kind of double-view field switching mechanism of quick response Download PDFInfo
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- CN109946811A CN109946811A CN201910185920.8A CN201910185920A CN109946811A CN 109946811 A CN109946811 A CN 109946811A CN 201910185920 A CN201910185920 A CN 201910185920A CN 109946811 A CN109946811 A CN 109946811A
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Abstract
The present invention provides a kind of double-view field switching mechanism of quick response, it is not able to satisfy with to solve existing switching mechanism and is switched fast and the demand of the severe mechanical environment of missile-borne.The mechanism includes driving assembly and limit assembly;Driving assembly includes rotating electromagnet, pedestal and swinging axle;Rotating electromagnet is arranged on the base by electromagnet support, and output shaft is fixedly connected with swinging axle, and one end of swinging axle is fixedly connected with zoom microscope group;Limit assembly includes magnetic locking unit and mechanical locking unit;Magnetic locking unit includes ferromagnetic seat and loses power-type electromagnet, and ferromagnetic seat is arranged on swinging axle, loses power-type electromagnet and is arranged on electromagnet support, loses power-type electromagnet and the locking of swinging axle is realized in the cooperation of ferromagnetic seat;Mechanical locking unit includes spring-loaded plunger and taper socket arrangement part, and spring-loaded plunger is arranged on swinging axle;Taper socket arrangement part and spring-loaded plunger match, and realize the locking of swinging axle.
Description
Technical field
The present invention relates to missile-borne double-view field infrared imaging load fields, and in particular to a kind of double-view field switching of quick response
Mechanism.
Background technique
The switch forms of big/small field of view are mainly divided to two classes in existing dual field-of-view infrared optical system: one kind is to pass through zoom
Microscope group and the variation for compensating microscope group axial spacing, and then change the focal length value of optical system to realize the switchings of different visual fields, this
Kind axial zoom form switching time is longer, equipment adjustment is more complex, and the number of lenses for participating in imaging is more, to system
Image quality, transmitance have a certain impact;Another kind of is to cut/cut out realization in optical system by zoom microscope group not
With the switching of visual field, this radial direction zoom form generallys use servo motor as driving element, is carried out by position sensor
Positioning, since the electrical time constant of servo motor is larger, starting is slower, therefore is unable to complete being switched fast for visual field, is easy
Lead to the loss that target is tracked when visual field switches, secondly as missile-borne mechanical environment is severe, limit form, which is not able to satisfy, to be needed
It asks.Therefore, a kind of quick response suitable for missile-borne environment is designed, the double-view field switching mechanism of high stability has great show
Sincere justice.
Summary of the invention
The present invention provides a kind of double-view field switching mechanism of quick response using rotating electromagnet as driving element,
The structure can be realized fast zoom, and add the limit of mechanical interlock mechanism using electric limit, mechanical position limitation, magnetic locking mechanism
Position form, can adapt to the severe mechanical environment of missile-borne, with solve existing switching mechanism be not able to satisfy visual field be switched fast and
The demand of the severe mechanical environment of missile-borne.
Technical solution of the invention is as follows:
A kind of double-view field switching mechanism of quick response, including driving assembly and limit assembly;The driving component includes
Rotating electromagnet, pedestal, electromagnet support and swinging axle;The rotating electromagnet is arranged on the base by electromagnet support,
Its output shaft is fixedly connected with swinging axle, and one end of the swinging axle is fixedly connected with zoom microscope group;The limit assembly includes
Magnetic locking unit and mechanical locking unit;The magnetic locking unit includes that ferromagnetic seat and at least two groups lose power-type electromagnetism
Iron, the ferromagnetic seat are arranged on swinging axle, and the mistake power-type electromagnet is arranged on electromagnet support, and is located at iron
The two sides of magnetic support, the locking for losing power-type electromagnet and ferromagnetic seat cooperation realization swinging axle;The mechanical locking unit packet
Spring-loaded plunger and taper socket arrangement part are included, the spring-loaded plunger is arranged on swinging axle, including ball, spring, shell and lock
Tight nut, is provided with installation cavity in the shell, and cavity front end is taper, and the locking nut is by spring by ball pressure
Tightly in cavity front end;The taper socket arrangement part is fixed on the base, and concave groove is arranged, and the ball and concave groove match
It closes, realizes the locking of swinging axle.
Further, the driving component further includes clump weight, and the other end of swinging axle is arranged in the clump weight, and puts
The middle part of moving axis is fixedly connected with the output shaft of rotating electromagnet.The increase of clump weight is to keep the master of zoom microscope group center of gravity used
Property axis coincide with rotation axis, reduce zoom microscope group unbalanced centrifugal force when cutting/cutting out, so that zoom microscope group
Movement is steady.
Further, the limit assembly further includes mechanical position limitation unit, the mechanical position limitation unit include resilient cushion and
Limited block, the limited block setting is fixed on swinging axle, and is located at the two sides of ferromagnetic seat, and the resilient cushion is arranged in electricity
On magnet support, and it is located at the side for losing power-type electromagnet, the resilient cushion and limited block match, for reducing ferromagnetic seat
With the impact for losing power-type electromagnet.
Further, the material of the resilient cushion is polyurethane.
Further, the limit assembly further includes electric position-limiting unit, and the electricity position-limiting unit includes limit switch and opens
Baffle is closed, the switch baffle is arranged on swinging axle, and the limit switch is arranged on electromagnet support, the limit switch
To approach switch or optoelectronic switch.
Further, the output shaft of the rotating electromagnet is mounted in bearing block by bearing, and is exported shaft end and set
It is equipped with bearing (ball) cover, the bearing block is fixedly mounted on electromagnet support.
Further, the bearing is a pair of of angular contact bearing, and back-to-back installation, such matching method can guarantee bearing
It is able to bear from axial, the radial positive and negative angle stress of various aspects.
Further, the mistake power-type electromagnet is arranged on electromagnet support by support frame, and loses power-type electricity
Electromagnetism iron gasket is provided between magnet and support frame.
Further, the ferromagnetic seat is iron-nickel alloy seat.
Further, adjustment of load nut is additionally provided between the locking nut and spring.
Compared with prior art, the present invention beneficial effect is:
1. the rotating electromagnet in double-view field switching mechanism of the present invention is short compared with servo motor electrical time constant, energy after power-up
It is enough rapidly reached peak velocity, and output torque is basically unchanged within the scope of -45 DEG C~60 DEG C, can be realized by test
0.3s fast zoom can adapt to the severe large impact mechanical environment of missile-borne.
Determine 2. the magnetic locking unit in double-view field switching mechanism of the present invention is cut/cut out to play afterwards in place in zoom microscope group
Position and locking function, magnetic locking unit have small in size, magnetic force using power-type electromagnet and ferromagnetic seat matching form is lost
Greatly, the advantages that low in energy consumption, impact resistance.
3. the mechanical locking unit in double-view field switching mechanism of the present invention plays double positioning and locking function, bullet can adapt to
Carry severe large impact mechanical environment.
4. the resilient cushion and limited block in double-view field switching mechanism of the present invention belong to mechanical position limitation unit, subtracted using polyurethane
Shake pad had not only played the function of limit, but also can alleviate the impact of zoom microscope group.
5. electric position-limiting unit in double-view field switching mechanism of the present invention uses optoelectronic switch, advantage is small in size, sensitivity
Height, and electromagnet feedback signal is given after triggering.
Detailed description of the invention
Fig. 1 is the structure chart of infrared optical imaging system;
Fig. 2 is the axis surveys view of the double-view field switching mechanism of quick response of the present invention;
Fig. 3 is the front view of the double-view field switching mechanism of quick response of the present invention;
Fig. 4 is the left view of the double-view field switching mechanism of quick response of the present invention;
Fig. 5 is the partial enlarged view of the mechanical interlock mechanism of Fig. 4;
Fig. 6 is the axis surveys view of the double-view field switching mechanism (clipped component) of quick response of the present invention;
Fig. 7 is the spring-loaded plunger cross-sectional view of the double-view field switching mechanism of quick response of the present invention;
Fig. 8 is that the double-view field switching mechanism of quick response of the present invention omits the structure chart of ferromagnetic seat;
Fig. 9 is that the double-view field switching mechanism of quick response of the present invention omits the front view of zoom microscope group.
Appended drawing reference: 1- window glass, 2- spectroscope, 3- spectrum groupware, 4- LONG WAVE INFRARED Liar group, 5- medium wave are red
Outer Liar component, 6- Long Wave Infrared Probe component, 7- medium-wave infrared detector assembly;8- rotating electromagnet, 9- electromagnetism
Iron support, 10- bearing block, 11- clump weight, 12- bearing, 13- swinging axle, 14- bearing (ball) cover, 15- zoom microscope group, 16- pedestal,
17- support frame, 18- electromagnetism iron gasket, 19- mistake power-type electromagnet, the ferromagnetic seat of 20-, 29- limit switch, 30- switch baffle,
24- resilient cushion, 25- limited block, 31- spring-loaded plunger, 32- stop screw, 33- taper socket arrangement part, 35- ball, 36- bullet
Spring, 37- shell, 38- adjustment of load nut, 39- locking nut, 40- bearing shim.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments.
Infrared optical imaging system includes infrared optics objective lens unit, infrared detector module and electrically-controlled component, wherein
Infrared optics objective lens unit is divided into window glass, spectrum groupware, LONG WAVE INFRARED Liar component, medium-wave infrared again from structure
Four modular assemblies of Liar component.Medium-wave infrared Liar component is fixed-focus Liar component, LONG WAVE INFRARED optics
Objective lens unit is double-view field variable focus package.As shown in Figure 1, infrared optical imaging system specifically mainly includes window glass 1, light splitting
Mirror 2, spectrum groupware 3, LONG WAVE INFRARED Liar group 4, medium-wave infrared Liar component 5, Long Wave Infrared Probe component 6,
Medium-wave infrared detector assembly 7;Wherein medium-wave infrared Liar component 5 is fixed-focus Liar component, LONG WAVE INFRARED optics
Objective lens unit 4 is double-view field variable focus package.
The double-view field switching mechanism that LONG WAVE INFRARED double-view field variable focus package provides through the invention realizes zoom microscope group
It switches in and out.Double-view field switching mechanism includes driving assembly and limit assembly.Driving assembly mainly by rotating electromagnet 8,
Electromagnet support 9 and driving shafting etc. are constituted, and wherein drive shaft owner will include angular contact ball bearing 12, the axis of a pair of P4 precision
Hold seat 10, bearing (ball) cover 14, zoom microscope group 15 etc..The rotary shaft of zoom microscope group 15 and the output shaft of rotating electromagnet 8 pass through two
The soket head cap screw of a M2.5 is fastened.A pair of of angular contact ball bearing 12 in shafting is driven to use " back-to-back " matching side
Formula, such matching method can guarantee that bearing 12 is able to bear from axial, the radial positive and negative angle stress of various aspects.It is cut by repairing
The bearing shim 40 of bearing block 10 and bearing (ball) cover 14 is to achieve the purpose that design 12 preload of bearing 12 preload of bearing
Main purpose be to eliminate that bearing 12 is axial, radial internal clearance, reduce rotation noise, the stress of receiving farthest divided equally
To each ball 35 to increase the purpose of load-bearing capacity, to guarantee the accuracy of shafting and the service life of bearing 12.
The limit assembly of LONG WAVE INFRARED double-view field variable focus package is mainly using electric limit, mechanical position limitation, magnetic locking mechanism
Add the combining form of mechanical interlock mechanism.In the incision of zoom microscope group 15, cuts out two positions and be equipped with a set of electricity limit, mechanical limit
Position, magnetic locking mechanism and mechanical interlock mechanism, the limit for two kinds of operating conditions.Wherein electricity limit using close to switch or
Optoelectronic switch;Mechanical position limitation uses polyurethane vibration-absorptive material;Magnetic locking mechanism is closed using mistake power-type electromagnet 19 and iron nickel
Golden seat combining form loses power-type electromagnet 19 i.e. energization and loses magnetic force, power interruption recovering magnetic force, therefore uses and lose power-type electromagnetism
Iron 19 is only powered in visual field handoff procedure, and locking can be powered off after visual field finishing switching, reduces power consumption;Mechanical interlock mechanism is adopted
With the spring-loaded plunger 31 and 33 combining form of taper socket arrangement part of load changeable type, pass through the spring 36 of adjustment spring plunger 31
Pretightning force, thus it is possible to vary the load capacity of plunger.
Such as the double-view field switching mechanism of quick response shown in Figs. 2 to 9, including driving assembly and limit assembly.
Driving assembly includes rotating electromagnet 8, pedestal 16, clump weight 11, electromagnet support 9 and swinging axle 13;Electric rotating
Magnet 8 is arranged on pedestal 16 by electromagnet support 9, and output shaft is fixedly connected with swinging axle 13, one end of swinging axle 13
It is fixedly connected with zoom microscope group 15;The output shaft of rotating electromagnet 8 is mounted in bearing block 10 by bearing 12, and output shaft end
End is provided with bearing (ball) cover 14, and bearing block 10 is fixedly mounted on electromagnet support 9, and bearing 12 is the angular contact of a pair of P4 precision
Ball bearing 12, and back-to-back installation.The other end of swinging axle 13, and the middle part of swinging axle 13 and electric rotating is arranged in clump weight 11
The output shaft of magnet 8 is fixedly connected, and increasing clump weight 11 is the principal axis of inertia line and rotary shaft in order to make 15 center of gravity of zoom microscope group
Line coincides, and reduces unbalanced centrifugal force when zoom microscope group 15 is cut/cut out, so that zoom microscope group 15 moves steadily.
Limit assembly includes magnetic locking unit, mechanical locking unit, mechanical position limitation unit and electric position-limiting unit.
Magnetic locking unit includes ferromagnetic seat 20 and at least two groups lose power-type electromagnet 19, and the ferromagnetic setting of seat 20 is being swung
On axis 13, loses power-type electromagnet 19 and be arranged on electromagnet support 9, and be located at the two sides of ferromagnetic seat 20, lose power-type
The locking of swinging axle 13 is realized in electromagnet 19 and the cooperation of ferromagnetic seat 20;Power-type electromagnet 19 is lost to be arranged by support frame 17 in electricity
It on magnet support 9, and loses and is provided with electromagnetism iron gasket 18 between power-type electromagnet 19 and support frame 17, ferromagnetic seat 20 is specially
Iron-nickel alloy seat.
Mechanical locking unit includes spring-loaded plunger 31 and taper socket arrangement part 33, and the spring-loaded plunger 31 for loading changeable type is logical
It crosses stop screw 32 to be arranged on swinging axle 13, including ball 35, spring 36, shell 37 and locking nut 39, be set in shell 37
It is equipped with installation cavity, and cavity front end is taper, ball 35 is pressed on cavity front end by spring 36 by locking nut 39;Taper
Concave groove is set on socket arrangement part 33, and ball 35 and concave groove match, and realize the locking of swinging axle 13.39 He of locking nut
Adjustment of load nut 38,38 holddown spring 36 of adjustment of load nut, by the pressure for changing spring 36 are additionally provided between spring 36
Contracting deformation quantity changes the pretightning force of spring 36, thus change the pretightning force of spring-loaded plunger 31, after the load for adjusting plunger, then
It is locked with locking nut 39, prevents adjustment of load nut 38 from loosening.
Mechanical position limitation unit includes resilient cushion 24 and limited block 25, and the setting of limited block 25 is fixed on swinging axle 13,
And it is located at the two sides of ferromagnetic seat 20, resilient cushion 24 is arranged on electromagnet support 9, and is located at and loses the one of power-type electromagnet 19
Side, resilient cushion 24 and limited block 25 match, for reducing ferromagnetic seat 20 and losing the impact of power-type electromagnet 19, resilient cushion 24
Polyurethane vibration-absorptive material specifically can be used.
Electric position-limiting unit includes limit switch 29 and switch baffle 30, and switch baffle 30 is arranged on swinging axle 13, limit
Switch 29 is arranged on electromagnet support 9, and limit switch 29 is close to switch or optoelectronic switch.
Work when the zoom microscope group 15 that the present invention gives the double-view field switching mechanism of above-mentioned quick response is cut/cut out
Make process;
1) zoom microscope group cut-in condition
When zoom microscope group 15 is by cutting out conversion to cut-in condition, the mistake power-type electromagnet 19 at limit assembly both ends leads to simultaneously
Electricity, at this time electromagnet magnetic force disappear, while rotating electromagnet 8 connect high voltage generate torque get rid of mechanical interlock mechanism to
Drive the rotation incision of zoom microscope group 15.When the optoelectronic switch baffle 30 being connected in zoom microscope group 15 blocks optoelectronic switch, rotation
Turn electromagnet 8 and be down to low-voltage, positions and lock that provide the first relocking tight for zoom microscope group 15;Zoom microscope group 15 encounters mechanical limit
On position, since mechanical position limitation uses polyurethane vibration-absorptive material, alleviate the impact of zoom microscope group 15, at this time under effect of inertia, becomes
The ball of spring-loaded plunger 31 in times microscope group 15 is caught in taper ball-and-socket, so that mechanical interlock mechanism is locked, it is zoom microscope group 15
It is tight that positioning and locking provide the second relocking;Electromagnet power-off simultaneously generates magnetic force, so that magnetic locking mechanism locks, it is zoom mirror
It is tight that 15 positioning of group and locking provide third relocking.Triple lockings lock zoom microscope group 15, complete zoom microscope group 15 at this time
Incision.
2) zoom microscope group cuts out operating condition
It is similar to above-mentioned 15 cut-in condition workflow of zoom microscope group that zoom microscope group 15 cuts out operating condition, first limit assembly two
The mistake power-type electromagnet 19 at end is powered simultaneously, and the magnetic force of electromagnet disappears at this time, while rotating electromagnet 8 is connected high voltage and produced
Raw torque gets rid of mechanical interlock mechanism to drive the rotation of zoom microscope group 15 to cut out.When the photoelectricity being connected in zoom microscope group 15 is opened
When pass baffle 30 blocks optoelectronic switch, rotating electromagnet 8 is down to low-voltage, positions for zoom microscope group 15 and locking provides the first weight
Locking;Zoom microscope group 15 is encountered on mechanical position limitation, since mechanical position limitation uses polyurethane vibration-absorptive material, alleviates zoom microscope group 15
Impact, at this time under effect of inertia, the ball of the spring-loaded plunger 31 in zoom microscope group 15 is caught in taper ball-and-socket, thus mechanical lock
It is tight to provide the second relocking for the positioning of zoom microscope group 15 and locking for tight mechanism locking;Electromagnet power-off simultaneously generates magnetic force, thus magnetic
The locking of power retaining mechanism, for the positioning of zoom microscope group 15 and locking, to provide third relocking tight.Triple lockings carry out zoom microscope group 15
Cutting out for zoom microscope group 15 is completed in locking at this time.
The present invention gives the assembly method of the double-view field switching mechanism of above-mentioned quick response, specific assembly method and
Steps are as follows:
1) rotating electromagnet 8 and electromagnet support 9 are connected by the sunk screw of 3 M4;
2) bearing block 10 is fixed on electromagnet support 9 by the pan head screw of 4 M3;
3) optoelectronic switch is fixed on electromagnet support 9 by the pan head screw of 2 M2;
4) electromagnetism iron gasket 18, mistake power-type electromagnet 19 are successively fixed on by support frame by the pan head screw of 1 M4
On 17, polyurethane shock pad 24 is fixed on support frame 17 by the pan head screw of 1 M4;
5) clump weight 11 is fixed in zoom microscope group 15 by the soket head cap screw of 4 M3;
6) iron-nickel alloy seat 24 is fixed in zoom microscope group 15 by the pan head screw of 4 M3;
7) limited block 25 is fixed in zoom microscope group 15 by the soket head cap screw of 2 M3;
8) optoelectronic switch baffle 30 is fixed in zoom microscope group 15 by the sunk screw of 1 M2;
9) spring-loaded plunger 31 for loading changeable type is screwed into zoom microscope group 15, and passes through stop screw 32 for spring-loaded plunger
31 is fixed;
10) taper socket arrangement part 33 is fixed on pedestal 16 by the pan head screw of 2 M3;
11) electromagnet support 9 is fixed on pedestal 16 by the pan head screw of 4 M3;
12) support frame 17 is fixed on electromagnet support 9 by the pan head screw of 3 M3;
13) successively angular contact ball bearing 12, zoom microscope group 15, angular contact ball bearing 12 are mounted on bearing block 10, this
Two angular contact ball bearings use " back-to-back " matching method, and zoom microscope group 15 is connected in by the soket head cap screw of two M2.5
On the swinging axle 13 of rotating electromagnet 8;
14) by adjusting the position of optoelectronic switch, so that zoom microscope group 15 cuts 4 time of LONG WAVE INFRARED Liar component
Electric switch baffle 30 triggers optoelectronic switch work;
15) electromagnetism iron gasket 18, limited block 25 are cut by repairing, so that optoelectronic switch loses power-type electromagnet when triggering work
19 touch with iron-nickel alloy seated connection, while limited block 25 is contacted with polyurethane shock pad 24;
16) by adjusting the position of taper socket arrangement part 33, so that load changeable type when optoelectronic switch triggers work
The ball 35 of spring-loaded plunger 31 is caught in the taper ball-and-socket of taper socket arrangement part 33;
17) by adjusting the adjustment of load nut 38 of spring-loaded plunger 31, so that zoom microscope group 15 can under mechanical environment
It is locked while can also be realized under the action of rotating electromagnet 8 and cut/cut out function, after adjustment of load nut 38 is adjusted,
It is locked again by locking nut 39.
Claims (10)
1. a kind of double-view field switching mechanism of quick response, it is characterised in that: including driving assembly and limit assembly;
The driving component includes rotating electromagnet (8), electromagnet support (9), pedestal (16) and swinging axle (13);The rotation
Electromagnet (8) is arranged on pedestal (16) by electromagnet support (9), and output shaft is fixedly connected with swinging axle (13), described
One end of swinging axle (13) is fixedly connected with zoom microscope group (15);
The limit assembly includes magnetic locking unit and mechanical locking unit;
The magnetic locking unit includes that ferromagnetic seat (20) and at least two groups lose power-type electromagnet (19), the ferromagnetic seat (20)
It is arranged on swinging axle (13), the mistake power-type electromagnet (19) is arranged on electromagnet support (9), and is located at ferromagnetic
The two sides of seat (20), the locking lost power-type electromagnet (19) and ferromagnetic seat (20) cooperation and realize swinging axle (13);
The mechanical locking unit includes spring-loaded plunger (31) and taper socket arrangement part (33), spring-loaded plunger (31) setting
On swinging axle (13), including ball (35), spring (36), shell (37) and locking nut (39), the shell (37) is interior to be set
It is equipped with installation cavity, and cavity front end is taper, ball (35) is pressed on chamber by spring (36) by the locking nut (39)
Body front end;The taper socket arrangement part (33) is fixed on pedestal (16), and concave groove, the ball (35) and concave is arranged
Slot matches, and realizes the locking of swinging axle (13).
2. the double-view field switching mechanism of quick response according to claim 1, it is characterised in that: the driving component is also wrapped
It includes clump weight (11), the other end in swinging axle (13), and the middle part of swinging axle (13) and rotation is arranged in the clump weight (11)
The output shaft of electromagnet (8) is fixedly connected.
3. the double-view field switching mechanism of quick response according to claim 2, it is characterised in that: the limit assembly also wraps
Mechanical position limitation unit is included, the mechanical position limitation unit includes resilient cushion (24) and limited block (25), limited block (25) setting
It is fixed on swinging axle (13), and is located at the two sides of ferromagnetic seat (20), the resilient cushion (24) is arranged in electromagnet support
(9) on, and it is located at the side for losing power-type electromagnet (19), the resilient cushion (24) and limited block (25) match, for subtracting
Small ferromagnetic seat (20) and the impact for losing power-type electromagnet (19).
4. the double-view field switching mechanism of quick response according to claim 3, it is characterised in that: the resilient cushion (24)
Material is polyurethane.
5. the double-view field switching mechanism of quick response according to any one of claims 1 to 4, it is characterised in that: the limit
Component further includes electric position-limiting unit, and the electricity position-limiting unit includes limit switch (29) and switch baffle (30), the switch gear
Piece (30) is arranged on swinging axle (13), and the limit switch (29) is arranged on electromagnet support (9), the limit switch
It (29) is close switch or optoelectronic switch.
6. the double-view field switching mechanism of quick response according to claim 5, it is characterised in that: the rotating electromagnet
(8) output shaft is mounted in bearing block (10) by bearing (12), and is exported shaft end and be provided with bearing (ball) cover (14), described
Bearing block (10) is fixedly mounted on electromagnet support (9).
7. the double-view field switching mechanism of quick response according to claim 6, it is characterised in that: the bearing (12) is one
Angular contact bearings, and back-to-back installation.
8. the double-view field switching mechanism of quick response according to claim 7, it is characterised in that: the mistake power-type electromagnetism
Iron (19) is arranged on electromagnet support (9) by support frame (17), and lose power-type electromagnet (19) and support frame (17) it
Between be provided with electromagnetism iron gasket (18).
9. the double-view field switching mechanism of quick response according to claim 8, it is characterised in that: the ferromagnetic seat (20) is
Iron-nickel alloy seat.
10. the double-view field switching mechanism of quick response according to claim 9, it is characterised in that: the locking nut
(39) it is provided between spring (36) adjustment of load nut (38).
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