CN111256000A - Stop device suitable for radar azimuth rotation surpasses 180 degrees - Google Patents
Stop device suitable for radar azimuth rotation surpasses 180 degrees Download PDFInfo
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- CN111256000A CN111256000A CN202010116551.XA CN202010116551A CN111256000A CN 111256000 A CN111256000 A CN 111256000A CN 202010116551 A CN202010116551 A CN 202010116551A CN 111256000 A CN111256000 A CN 111256000A
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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
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
- F16M11/08—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a vertical axis, e.g. panoramic heads
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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
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention relates to a stop device suitable for radar azimuth rotation exceeding +/-180 degrees, which comprises: the stop block is fixedly arranged on the azimuth turntable; the transmission assembly comprises a driving part and two driven parts, and the driving part is fixedly connected with the rotary table azimuth turntable; the two driven parts are respectively in mechanical transmission with the driving part; the approach block is fixedly arranged on the driving part; the two screw rod transmission mechanisms comprise screw rod parts and sliding block parts, and the sliding block parts are provided with mechanical backstops and proximity switches; when the position turntable rotates, the driving part, the stop block and the approaching block are driven to synchronously rotate, the two driven parts relatively rotate and drive the two screw rod parts to relatively rotate, the approach switch and the mechanical stop in the sliding block part at a near angle are respectively avoided from being inducted and collided with the approaching block and the stop block, and the approach switch and the mechanical stop in the sliding block part at a far angle can be inducted and collided with the approaching block and the stop block respectively. The technical problem that the existing stopping device cannot stop when the radar azimuth rotation exceeds +/-180 degrees is solved.
Description
Technical Field
The invention relates to a stop device, in particular to a stop device suitable for radar azimuth rotation exceeding +/-180 degrees.
Background
The azimuth turntable is an important component of a radar system and mainly used for driving a radar antenna to rotate with high precision according to system requirements. Under the condition that the azimuth rotation range is less than 360 degrees, in order to prevent the limiting failure of the encoder fault software, the azimuth turntable rotates beyond the limit position to damage the antenna or other machine parts and protect the radar antenna from being damaged by collision with other machine parts, a stop device is required to be arranged on the azimuth turntable.
Currently, the azimuth turntable stop device is mainly used for azimuth rotation angles smaller than +/-180 degrees, and comprises an electrical stop and a mechanical stop. The rotating part of the azimuth turntable is provided with an approach block and a stop block, the limit position of the fixed part of the azimuth turntable is provided with an approach switch and a mechanical stop, when the rotating part rotates to the limit position, the approach block triggers the approach switch, the electrical stop function is realized, and the rotating part stops rotating. When the electric stop is out of order, the rotating part continues to rotate, the stop collides with the mechanical stop, and the rotating part stops rotating.
When the azimuth rotation angle exceeds +/-180 degrees, the stop block interferes with the movement of the mechanical stop, and when the rotating part of the azimuth turntable rotates towards any direction, the approach block and the stop block on the azimuth turntable respectively approach and collide with the approach switch and the mechanical stop of the approach angle firstly, so that the rotating part cannot rotate continuously, and the azimuth rotation angle required by the system cannot be reached.
Disclosure of Invention
The invention aims to provide a stopping device suitable for radar azimuth rotation exceeding +/-180 degrees, and aims to solve the technical problem that the conventional stopping device cannot be used when the radar azimuth rotation exceeds +/-180 degrees.
In order to solve the problems, the invention provides a stopping device suitable for radar azimuth rotation exceeding +/-180 degrees, the stopping device is arranged on an azimuth turntable, the azimuth turntable comprises an azimuth turntable and a base, the azimuth turntable is rotatably arranged on the base, and the stopping device comprises
The stop block is fixedly arranged on the azimuth turntable;
the transmission assembly comprises a driving part and two driven parts, and the driving part is fixedly connected with the azimuth turntable; the two driven parts are respectively arranged at the left side and the right side of the driving part and are respectively in mechanical transmission with the driving part;
the approach block is fixedly arranged on the driving part;
the two lead screw transmission mechanisms are respectively and movably arranged on the left side and the right side of the base; the screw rod transmission mechanism comprises a screw rod part and a sliding block part, and the sliding block part is in threaded connection with the screw rod part and can move up and down on the screw rod part; the sliding block part is provided with a mechanical stop and a proximity switch;
when the position turntable rotates, the driving part, the stop block and the proximity block are driven to synchronously rotate, the driven part relatively rotates and drives the screw rod part to relatively rotate, the mechanical stop and the proximity switch in the sliding block part at a near angle are respectively avoided from colliding and sensing with the stop block and the proximity block, and the mechanical stop and the proximity switch in the sliding block part at a far angle are respectively collided and sensing with the stop block and the proximity block.
Preferably, the stop block is fixed on the lower end face of the azimuth turntable;
the transmission assembly and the two lead screw transmission mechanisms are arranged in the base and are positioned below the azimuth turntable.
Preferably, the two driven parts are respectively a left driven part and a right driven part, and the left driven part and the right driven part are respectively in gear transmission with the driving part.
Preferably, the driving part comprises a gearwheel and a cylinder, and the gearwheel is coaxially and fixedly connected with the azimuth turntable through the cylinder; the approaching block is fixed on the bull gear;
the left driven part comprises two left small gears which are arranged at intervals, and the two left small gears are respectively positioned on the left side of the bull gear and are respectively meshed with the bull gear;
the right driven part comprises two right small gears which are arranged at intervals, and the two right small gears are respectively positioned on the right side of the bull gear and are respectively meshed with the bull gear;
in the transmission process, the rotating directions of the two left small gears are consistent with the rotating directions of the two right small gears, and the rotating directions of the left small gear and the right small gear are opposite to the rotating direction of the large gear.
Preferably, the two screw transmission mechanisms are respectively a left screw transmission mechanism and a right screw transmission mechanism:
the left lead screw transmission mechanism comprises a left lead screw part and a left slider part, and the left lead screw part is fixedly connected with the left driven part; the left sliding block part is in threaded connection with the left lead screw part; the left sliding block part is provided with a left mechanical stop and a left proximity switch;
the left screw rod part comprises two left screw rods which are arranged at intervals, and the two left screw rods are respectively coaxially and fixedly connected with the two left pinions; the left sliding block part is in threaded connection with the two left lead screws;
the right lead screw transmission mechanism comprises a right lead screw part and a right sliding block part, and the right lead screw part is fixedly connected with the right driven part; the right sliding block part is in threaded connection with the right lead screw part; the right sliding block part is provided with a right mechanical stop and a right proximity switch;
the right screw part comprises two right screws which are arranged at intervals, and the two right screws are respectively coaxially and fixedly connected with the two right pinions; the right sliding block part is in threaded connection with the two right lead screws;
in the rotating process, the rotating directions of the two left screw rods are consistent, the rotating directions of the two right screw rods are consistent, and the rotating directions of the left screw rods and the right screw rods are opposite.
Preferably, the left slider part comprises a left slider, and the left slider is provided with two left-handed threaded holes which are respectively meshed with the two left lead screws; the left mechanical stop is arranged at the upper end of the left sliding block, and the left proximity switch is arranged at the bottom of the left sliding block;
the right sliding block part comprises a right sliding block, and two right-handed threaded holes which are respectively meshed with the two right lead screws are formed in the right sliding block; the right mechanical stop is arranged at the upper end of the right sliding block, and the right proximity switch is arranged at the bottom of the right sliding block.
Preferably, the left mechanical stop and the right mechanical stop comprise a shell, an end cover, an elastic piece, a push rod and a microswitch, and the shell is fixed on the upper end face of the sliding block; the micro switch is arranged in the shell; the push rod penetrates through one side of the shell through the elastic piece and is arranged corresponding to the micro switch; when the stop block collides with the push rod, the push rod compresses the elastic piece and then touches the micro switch, and the micro switch stops the azimuth turntable through a servo control system; if the micro switch or the servo control system has a fault, after the elastic piece is compressed to a limit position, the outer end face of the push rod is flush with the outer end face of the end cover, and the outer end face of the end cover is contacted with the stop block to stop the azimuth turntable.
Preferably, a left fixed seat is fixedly arranged on the left inner wall of the base, and the upper end and the lower end of each of the two left lead screws are respectively in threaded connection with the left fixed seat;
and a right fixed seat is fixedly arranged on the right inner wall of the base, and the upper end and the lower end of the right lead screw are respectively in threaded connection with the right fixed seat.
Preferably, the left sliding block is further provided with a left guide device, one end of the left guide device is fixedly connected with the left sliding block, and the other end of the left guide device is attached to the guide surface of the left fixed seat and can generate relative displacement;
the side of the right sliding block is also provided with a right guide device, one end of the right guide device is fixedly connected with the right sliding block, and the other end of the right guide device is attached to the guide surface of the right fixed seat and can generate relative displacement.
Preferably, a left sliding body is further arranged at the end part of the left guide device, and the left guide device rolls on the guide surface of the left fixed seat through the left sliding body;
the end part of the right guide device is also provided with a right sliding body, and the right guide device rolls on the guide surface of the right fixed seat through the right sliding body.
Compared with the prior art, the invention has the following technical effects:
1. the stopping device is suitable for stopping the radar azimuth rotation exceeding +/-180 degrees, and solves the problems that the existing stopping device of the radar azimuth turntable is interfered in movement and cannot be used when the rotation exceeds +/-180 degrees, and the radar azimuth turntable has potential safety hazards.
2. The invention completes the electrical and mechanical position limiting actions of the azimuth rotation under the condition that the structural form of the radar azimuth turntable is slightly changed, and does not influence the installation and use of a driving motor outside the turntable, an internal cable and a water hinge.
3. The stop device can meet the requirements of different azimuth rotation angles by designing relevant parameters of the meshing gear and the screw rod nut.
4. The stopping device is arranged in the base of the azimuth turntable, has good environmental adaptability, and avoids the corrosion failure of the existing radar azimuth turntable, which is usually arranged outside the turntable, in the environments of ocean reefs and the like.
5. The stop device has the characteristics of high precision, convenience in installation, compact structure, high reliability, flexible parameter design and the like.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. In the drawings:
FIG. 1 is a partial cross-sectional view A-A of an azimuth turntable with a stop device mounted thereon, suitable for radar azimuth rotation beyond + -180 deg. according to a preferred embodiment of the present invention;
FIG. 2 is a partial top view of an azimuth turntable with a stop device mounted thereon, suitable for radar azimuth rotation beyond + -180 deg. according to a preferred embodiment of the present invention;
FIG. 3 is a cross-sectional view B-B of a stop device provided in a preferred embodiment of the present invention;
FIG. 4 is a top view of a stop device provided in accordance with a preferred embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a left slider portion according to a preferred embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a right slider portion according to a preferred embodiment of the present invention;
FIG. 7 is a cross-sectional view of the left and right mechanical stops provided by the preferred embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a left slider according to a preferred embodiment of the present invention;
fig. 9 is a schematic structural view of a left fixing seat according to a preferred embodiment of the present invention.
Detailed Description
The stopping device for radar azimuth rotation exceeding ± 180 ° provided by the present invention will be described in detail with reference to fig. 1 to 9, and this embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments, and those skilled in the art can modify and color the stopping device without changing the spirit and content of the present invention.
Referring to fig. 1 to 9, a stopping device suitable for radar azimuth rotation exceeding ± 180 °, the stopping device being disposed on an azimuth turntable, the azimuth turntable including an azimuth turntable 4 and a base 1, the azimuth turntable 4 being rotatably disposed on the base 1, the base 1 being a fixed portion of the azimuth turntable, the azimuth turntable 4 being a rotating portion of the azimuth turntable, the stopping device comprising:
the stop block 5 is arranged on the azimuth turntable 4; in the present embodiment, the stopper 5 is fixed on the lower end face of the azimuth turntable 4;
the transmission assembly 8 comprises a driving part 81, a left driven part 82 and a right driven part 83, the driving part 81 is coaxially and fixedly connected with the azimuth turntable 4, and the left driven part 82 and the right driven part 83 are respectively positioned at the left side and the right side of the driving part 81 and are respectively in transmission connection with the driving part 81; the mechanical transmission mode of the left driven part 82 and the right driven part 83 and the driving part 81 is not particularly limited, and the transmission mode can be belt transmission, chain transmission, gear transmission and the like as long as mutual transmission can be realized; in the embodiment, the left driven part 82 and the right driven part 83 are respectively in gear transmission with the driving part 81;
a proximity block 9, the proximity block 9 being disposed on the active portion 81;
the left lead screw transmission mechanism 6 comprises a left lead screw part 61 and a left slider part 62, and the left lead screw part 61 is fixedly connected with the left driven part 82; the left slider part 62 is in threaded connection with the left lead screw part 61 and can move linearly up and down on the left lead screw part 61; the left slider part 62 is provided with a left mechanical stopper 622 and a left proximity switch 623;
the right screw transmission mechanism 3 comprises a right screw part 31 and a right slider part 32, and the right screw part 31 is fixedly connected with the right driven part 83; the right slider part 32 is connected to the right screw part 31 in a threaded manner and can move linearly up and down on the right screw part 31; a right mechanical stop 322 and a right proximity switch 323 are arranged on the right sliding block part 32;
when the azimuth turntable 4 rotates, the driving portion 81, the stop block 5 and the approaching block 9 are driven to synchronously rotate, the left driven portion 82 and the right driven portion 83 rotate relatively, the left lead screw portion 61 and the right lead screw portion 31 rotate relatively, and the left slider portion 62 and the right slider portion 32 do vertical relative linear motion.
In the present embodiment, the transmission assembly 8, the left screw transmission mechanism 6 and the right screw transmission mechanism 3 are all disposed in the base 1 and located below the azimuth turntable 4.
The driving part 81 includes a large gear 811 and a cylinder 812, and the large gear 811 is coaxially and fixedly connected with the azimuth turntable 4 through the cylinder 812. In this embodiment, the upper end of the cylinder 812 is fixedly connected to the azimuth turntable 4, and the lower end is fixedly connected to the large gear 811.
The approaching block 9 is fixed on the large gear 811 and is located below the stopper 5. In this embodiment, the proximity block 9 is a rod-shaped structure with a certain height, and the upper end thereof is provided with a protrusion, so that when the proximity switch moves upward and approaches the upper end of the proximity block 9, a sensing action is generated.
The left driven part 82 comprises two left small gears 821 arranged at intervals, and the two left small gears 821 are respectively positioned at the left side of the big gear 811 and are respectively meshed with the big gear 811;
the right driven part 83 comprises two right small gears 831 arranged at intervals, and the two right small gears 831 are respectively positioned at the right side of the bull gear 811 and are respectively meshed with the bull gear 811;
in the transmission process, the rotation direction of the left pinions 821 is the same as the rotation direction of the right pinions 831, and the left pinions 821 and the right pinions 831 are opposite to the rotation direction of the bull gear 811.
The left screw part 61 includes two left screws 611 arranged at intervals, and the two left screws 611 are respectively coaxially and fixedly connected with the two left pinions 821, which is preferably integrally formed in this embodiment; the left slider part 62 is respectively in threaded connection with the two left lead screws 611;
the right screw part 31 includes two right screws 311 arranged at intervals, the two right screws 311 are respectively and coaxially and fixedly connected with the two right pinions 831, and the embodiment is preferably integrally manufactured; the right slider part 32 is respectively in threaded connection with the two right lead screws 311;
in the rotating process, the rotating directions of the two left lead screws 611 are the same, the rotating directions of the two right lead screws 311 are the same, and the rotating directions of the left lead screws 611 and the right lead screws 311 are opposite.
The fixed left fixing base 7 that sets up on the left inner wall of base 1, left fixing base 7 include a left arc type cylinder 71, left side arc type cylinder 71 and the coaxial fixed connection of base 1, the inboard interval of left side arc type cylinder 71 sets up two sets of left installation punch combination, each group left side installation punch combination includes two left mounting holes 72 respectively, two left side mounting hole 72 is fixed the setting respectively and is in the upper and lower both ends of left side arc type cylinder 71. The upper end and the lower end of the left lead screw 611 are respectively connected with the upper left mounting hole 72 and the lower left mounting hole 72 in the same group in a rotating manner through a left bearing 73. The outer rings of the two left bearings 73 are provided with left bearing end covers 74 in a matching manner so as to meet the requirements of axial positioning and play of the left bearings 73.
Similarly, fixed right fixing base 2 that sets up on the right inner wall of base 1, right fixing base 2 includes a right arc type cylinder 21, right arc type cylinder 21 and the coaxial fixed connection of base 1, the inboard interval of right arc type cylinder 21 sets up two sets of right side installation punch combination, each group right side installation punch combination includes two right mounting holes 22 respectively, two right side mounting holes 22 is fixed the setting respectively and is in the upper and lower both ends of right arc type cylinder 21. The upper end and the lower end of the right screw 311 are respectively connected with the upper right mounting hole 22 and the lower right mounting hole 22 in the same group through right bearings in a rotating manner. And the outer rings of the two right bearings are matched with each other to form a right bearing end cover so as to meet the requirements of axial positioning and play of the right bearings.
In the present embodiment, the two left lead screws 611 and the two right lead screws 311 are located on the circumference of the same circle.
The left sliding block part 62 comprises a left sliding block 621, and two left-handed threaded holes 6211 respectively engaged with the two left lead screws 611 are formed in the left sliding block 621; the left mechanical stop 622 is arranged at the upper end of the left sliding block 621, and the left proximity switch 623 is arranged at the bottom of the left sliding block 621 through a left mounting seat 624;
the right slider part 32 comprises a right slider 321, and the right slider 321 is provided with two right-handed threaded holes 3211 which are respectively engaged with the two right lead screws 311; the right mechanical stop 322 is disposed at the upper end of the right slider 321, and the right proximity switch 323 is disposed at the bottom of the right slider 321 through a right mounting seat 324.
In this embodiment, the left slider 621 and the right slider 321 are symmetrically disposed on the left and right sides of the stopper 5 and the proximity block 9.
The left slider 621 and the right slider 321 are both arc-shaped brackets and are located on the circumference of the same circle.
Furthermore, the two left screws 611 and the left slider 621, the two right screws 311 and the right slider 321 are located on the circumference of the same circle, but are distributed on both sides of the circle.
The left mechanical stop 622 and the right mechanical stop 322 are identical in structure and symmetrically arranged, and respectively comprise a shell, an elastic piece, a push rod 6221 and a microswitch 6225, wherein the shells are respectively fixed on the upper end surfaces of the left sliding block 621 and the right sliding block 321; the microswitch 6225 is disposed within the housing; the push rod 6221 elastically passes through one side of the housing through the elastic member, and is disposed corresponding to the micro switch 6225.
The elastic member is not particularly limited as long as it has elasticity, such as a spring, an elastic body, etc., and a spring is preferred in this embodiment. In this embodiment, the housing includes a cover 6226, an outer end cap 6222 and an inner end cap 6223, a side end of the cover 6226 is provided with an opening, the outer end cap 6222 is fixed outside the opening, the inner end cap 6223 is screwed inside the outer end cap 6222, and a receiving space for receiving the spring 6227 is formed between the outer end cap 6222 and the inner end cap 6223. The microswitch 6225 is fixed to the outer side of the inner end cap 6223 (a housing space for housing the spring 6227 is formed between the inner side of the inner end cap 6223 and the inner side of the outer end cap 6222) by a connecting bracket 6224. The outer end cap 6222 and the inner end cap 6223 are both provided with a shaft hole, and the two shaft holes are coaxial. The push rod 6221 passes through the two shaft holes, and the spring 6227 is sleeved on the push rod 6221. In a natural state of the spring 6227, an outer end of the push rod 6221 protrudes outside the outer end cap 6222, and an inner end of the push rod 6221 does not contact the microswitch 6225.
When the stop block 5 collides with the push rod 6221, the push rod 6221 compresses the spring 6227 and then touches the microswitch 6225, and the microswitch 6225 stops the azimuth turntable 4 through a servo control system; if the microswitch 6225 or the servo control system fails, after the spring 6227 is compressed to a limit position, the outer end surface of the push rod 6221 is flush with the outer end surface of the outer end cap 6222, the outer end surface of the outer end cap 6222 is in contact with the stopper 5, and at this time, the left mechanical stopper 622 and the right mechanical stopper 322 are used as hard stoppers by matching with the housing, so that the azimuth turntable 4 stops rotating.
In this embodiment, the stopper 5 rotates synchronously with the azimuth dial 4, the movement locus of the stopper 5 is an arc, and the end face of the push rod 6221 is located on the arc of the movement locus of the stopper 5 when the left mechanical stopper 622 and the right mechanical stopper 322 rise to the limit positions.
When the electrical limit is lost and the azimuth dial 4 is turned to the limit position, the impact force when the stopper 5 collides with the left mechanical stopper 622 or the right mechanical stopper 322 tends to be large. The mechanical stop relieves a certain impact force by the compression of the spring, but a part of the impact force is transmitted to the left and right sliders. Because of the limitation of space size, the lead screw, the left and right sliding blocks only have transmission function, but have poor rigidity and strength and cannot bear impact force, and therefore, guiding devices are designed between the left sliding block 621, the right sliding block 321 and the left and right fixed seats. Namely, the left slider 621 is further provided with a left guide device 625, one end of the left guide device 625 is fixedly connected with the left slider 621, and the other end thereof is attached to the left fixing seat 7 and can generate relative displacement; the side of the right sliding block 321 is further provided with a right guiding device 325, one end of the right guiding device 325 is fixedly connected with the right sliding block 321, and the other end of the right guiding device 325 is attached to the right fixed seat 2 and can generate relative displacement. During assembly, the positions of the left slider 621 and the right slider 321 are adjusted to ensure that the left and the right guiding devices (625, 325) are tightly attached to the guiding surfaces of the left and the right fixed seats (7, 2). Due to the fact that the threaded connection between the lead screw and the left and right sliders has backlash, part of impact force generated when the stop 5 collides with the mechanical stop is generated on the guide surfaces between the left and right guide devices (625, 325) and the left and right fixed seats (7, 2). The left and right guide devices (625, 325) and the left and right fixed seats (7,2) bear impact force, the deformation of a lead screw in the transmission assembly 8 due to impact is avoided, and the reliability of the system is improved.
When the azimuth turntable 4 rotates, the left and right guide devices (625, 325) move linearly upwards or downwards along with the left and right sliding blocks (621, 321), and in order to reduce the friction force between the guide devices and the left and right fixed seats (7,2) during the up-and-down linear movement, the left and right guide devices (625, 325) are provided with rolling bodies to convert the sliding friction into rolling friction, so that the additional load of the radar azimuth turntable can be reduced.
In this embodiment, the left fixing seat 7 and the right fixing seat 2 are both processed with vertical grooves, and one side of each vertical groove is in contact with a corresponding guide device rolling body. As shown in fig. 9, taking the left fixing base 7 as an example, a left vertical groove 75 is formed in the middle of the left arc-shaped column 71.
The invention can reasonably design the installation positions of the left and right sliding blocks (621, 321) according to the rotation angle of the azimuth turntable, and reasonably design the gear transmission ratio and the lead of the lead screw in the transmission assembly 8, thereby realizing the application on the azimuth turntable with different rotation angles. The following description will be made in detail by taking the radar azimuth turntable rotation range ± 270 °, the electrical stop ± 273 °, and the mechanical stop ± 280 ° as examples.
As shown in fig. 2, the stopper 5 and the proximity block 9 are installed at a 0 ° position, the left and right collision surfaces of the stopper 5 are at ± 10 ° positions, the left and right proximity switches 623 and 323 are installed at ± 279 ° positions, respectively, the left and right mechanical stoppers 622 and 322 are installed at ± 287 ° positions, respectively, and the left and right guides 625 and 325 are installed at ± 290 ° positions, respectively. In this embodiment, the left lead screw 611 is a left-handed trapezoidal lead screw, and the right lead screw 311 is a right-handed trapezoidal lead screw. Before the azimuth dial 4 is not rotated, the left slider 621 and the right slider 321 are respectively located in the middle of the left lead screw 611 and the right lead screw 311, and are located at the same height.
When the azimuth turntable 4 rotates anticlockwise, the stop block 5, the approach block 9 and the large gear 811 are simultaneously driven to synchronously rotate, the large gear 811 is respectively in meshing transmission with the left pinion 821 and the right pinion 831 at the lower ends of the left lead screw 611 and the right lead screw 311 so as to drive the left lead screw 611 and the right lead screw 311 to do rotary motion, the left lead screw 611 is in meshing transmission with a left-handed threaded hole in the left slider 621, and the left slider 621 does downward linear motion; the right screw 311 is engaged with the right-handed threaded hole on the right slider 321 for transmission, and the right slider 321 makes upward linear motion. By reasonably configuring the gear transmission ratio and the lead of the lead screw, when the azimuth turntable 4 rotates to +/-90 degrees, the left slide block 621 descends by a distance just avoiding interference with the stop block 5 and the approach block 9; when the direction dial 4 rotates to + 273 °, the right slider 321 rises to the electric stop limit position, the approach block 9 triggers the right approach switch 323, and the right approach switch 323 stops the direction dial 4 through the servo control system. If the right proximity switch 323 fails, the azimuth dial 4 continues to rotate to a position of +/-277 degrees, at this time, the right slider 321 rises to a contact position of the right mechanical stopper 322, the collision surface of the stopper 5 collides with a push rod 6221 in the right mechanical stopper 322, the push rod 6221 compresses a spring 6227 for a certain distance, then the micro switch 6225 is touched, and the azimuth dial 4 is stopped by the micro switch 6225 through a servo control system. If the micro switch 6225 or the servo control system fails, after the spring 6227 is compressed to the limit position, the end face of the push rod 6221 is flush with the outer end face of the outer end cap 6222, the stopper 5 is in contact with the outer end face of the outer end cap 6222, at this time, the right mechanical stopper 322 is used as a hard stopper through the outer end cap 6222, and the azimuth turntable 4 is completely stopped when rotating to +/-280 degrees.
Similarly, when the azimuth dial 4 rotates clockwise, the left slider 621 makes an upward linear motion, the right slider 321 makes a downward linear motion, and the stopper 5 and the approaching block 9 avoid the descending right slider 321 with a close angle and approach the ascending left slider 621 with a far angle. When the azimuth dial 4 rotates to-273 degrees, the approach block 9 triggers the left approach switch 623 to act, and the left approach switch 623 stops the azimuth dial 4 through the servo control system. If the left proximity switch 623 fails and the direction dial 4 continues to rotate to-280 °, the left mechanical stop 622 on the left slider 621 operates, and the direction dial 4 stops.
In this embodiment, when the azimuth turntable 4 rotates, the gear in the transmission assembly 8 drives the lead screw to synchronously rotate, and through the different rotation direction design, the reasonable gear transmission ratio and the lead screw lead design of the left lead screw and the right lead screw, the slide block at a near angle always makes a downward linear motion, and the slide block at a far angle always makes an upward linear motion, so that the motion interference of the stop block 5 and the mechanical stop block at a near angle when the azimuth rotation exceeds +/-180 degrees is ingeniously avoided. And the left and right sliding blocks are provided with proximity switches and mechanical stops and have the functions of electrical stops and mechanical stops. The radar transmission assembly parameter design method can flexibly design transmission assembly parameters according to the radar azimuth rotation angle, and has the characteristics of good environmental adaptability, high precision, high reliability, convenience in installation, compact structure and the like.
The disclosure above is only one specific embodiment of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.
Claims (10)
1. The stop device is arranged on a position rotary table, the position rotary table comprises a position rotary table and a base, the position rotary table is rotatably arranged on the base, and the stop device is characterized by comprising a stop device body
The stop block is fixedly arranged on the azimuth turntable;
the transmission assembly comprises a driving part and two driven parts, and the driving part is fixedly connected with the azimuth turntable; the two driven parts are respectively arranged at the left side and the right side of the driving part and are respectively in mechanical transmission with the driving part;
the approach block is fixedly arranged on the driving part;
the two lead screw transmission mechanisms are respectively and movably arranged on the left side and the right side of the base; the screw rod transmission mechanism comprises a screw rod part and a sliding block part, and the sliding block part is in threaded connection with the screw rod part and can do linear motion on the screw rod part; the sliding block part is provided with a mechanical stop and a proximity switch;
when the position turntable rotates, the driving part, the stop block and the approaching block are driven to synchronously rotate, the driven part relatively rotates and drives the screw rod part to relatively rotate, the approaching switch and the mechanical stop in the sliding block part at a near angle are respectively avoided from being inducted and collided with the approaching block and the stop block, and the approaching switch and the mechanical stop in the sliding block part at a far angle can be inducted and collided with the approaching block and the stop block respectively.
2. The stopping device suitable for radar azimuth rotation exceeding +/-180 degrees of claim 1, wherein the stopping block is fixed on the lower end surface of the azimuth turntable;
the transmission assembly and the two lead screw transmission mechanisms are arranged in the base and are positioned below the azimuth turntable.
3. The stopping device for radar azimuth rotation exceeding ± 180 ° according to claim 2, wherein the two driven portions are a left driven portion and a right driven portion, and the left driven portion and the right driven portion are respectively geared with the driving portion.
4. The stopping device suitable for radar azimuth rotation exceeding +/-180 degrees of claim 3, wherein the driving part comprises a gearwheel and a cylinder, and the gearwheel is coaxially and fixedly connected with the azimuth turntable through the cylinder; the approaching block is fixed on the bull gear;
the left driven part comprises two left small gears which are arranged at intervals, and the two left small gears are respectively positioned on the left side of the bull gear and are respectively meshed with the bull gear;
the right driven part comprises two right small gears which are arranged at intervals, and the two right small gears are respectively positioned on the right side of the bull gear and are respectively meshed with the bull gear;
in the transmission process, the rotating directions of the two left small gears are consistent with the rotating directions of the two right small gears, and the rotating directions of the left small gear and the right small gear are opposite to the rotating direction of the large gear.
5. The stopping device for radar azimuth rotation exceeding ± 180 ° according to claim 4, wherein the two lead screw mechanisms are a left lead screw mechanism and a right lead screw mechanism respectively:
the left lead screw transmission mechanism comprises a left lead screw part and a left slider part, and the left lead screw part is fixedly connected with the left driven part; the left sliding block part is in threaded connection with the left lead screw part; the left sliding block part is provided with a left mechanical stop and a left proximity switch;
the left screw rod part comprises two left screw rods which are arranged at intervals, and the two left screw rods are respectively coaxially and fixedly connected with the two left pinions; the left sliding block part is respectively in threaded connection with the two left lead screws;
the right lead screw transmission mechanism comprises a right lead screw part and a right sliding block part, and the right lead screw part is fixedly connected with the right driven part; the right sliding block part is in threaded connection with the right lead screw part; the right sliding block part is provided with a right mechanical stop and a right proximity switch;
the right screw part comprises two right screws which are arranged at intervals, and the two right screws are respectively coaxially and fixedly connected with the two right pinions; the right sliding block part is respectively in threaded connection with the two right lead screws;
in the rotating process, the rotating directions of the two left screw rods are consistent, the rotating directions of the two right screw rods are consistent, and the rotating directions of the left screw rods and the right screw rods are opposite.
6. The stopping device suitable for radar azimuth rotation exceeding +/-180 degrees of claim 5, wherein the left sliding block part comprises a left sliding block, and two left-handed threaded holes which are respectively meshed with the two left lead screws are formed in the left sliding block; the left mechanical stop is arranged at the upper end of the left sliding block, and the left proximity switch is arranged at the bottom of the left sliding block;
the right sliding block part comprises a right sliding block, and two right-handed threaded holes which are respectively meshed with the two right lead screws are formed in the right sliding block; the right mechanical stop is arranged at the upper end of the right sliding block, and the right proximity switch is arranged at the bottom of the right sliding block.
7. The stopping device suitable for radar azimuth rotation exceeding +/-180 degrees of claim 6, wherein the left mechanical stop and the right mechanical stop are identical in structure and comprise a shell, an elastic piece, a push rod and a microswitch, and the shell is fixed on the upper end face of the left sliding block; the micro switch is arranged in the shell; the push rod elastically penetrates through one side of the shell through the elastic piece and is arranged corresponding to the micro switch; when the stop block collides with the push rod, the push rod compresses the elastic piece and then touches the micro switch, and the micro switch stops the azimuth turntable through a servo control system; if the micro switch or the servo control system has a fault, after the elastic piece is compressed to a limit position, the outer end face of the push rod is flush with the outer end face of the outer end cover, and the outer end face of the outer end cover is contacted with the stop block to stop the azimuth turntable.
8. The stopping device suitable for radar azimuth rotation exceeding +/-180 degrees according to claim 6, wherein a left fixing seat is fixedly arranged on the left inner wall of the base, and the upper end and the lower end of each of the left lead screws are respectively in threaded connection with the left fixing seat;
and a right fixed seat is fixedly arranged on the right inner wall of the base, and the upper end and the lower end of the right lead screw are respectively in threaded connection with the right fixed seat.
9. The stopping device suitable for radar azimuth rotation exceeding +/-180 degrees according to claim 8, wherein a left guide device is further arranged on the left sliding block, one end of the left guide device is fixedly connected with the left sliding block, and the other end of the left guide device is abutted with the guide surface of the left fixed seat and can generate relative displacement;
the side of the right sliding block is also provided with a right guide device, one end of the right guide device is fixedly connected with the right sliding block, and the other end of the right guide device is attached to the guide surface of the right fixed seat and can generate relative displacement.
10. The stopping device for radar azimuth rotation exceeding ± 180 ° according to claim 9, wherein a left sliding body is further provided on the outer portion of the left guiding device, and the left guiding device rolls on the guiding surface of the left fixing seat through the left sliding body;
and a right sliding body is further arranged outside the right guide device, and the right guide device rolls on the guide surface of the right fixed seat through the right sliding body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010116551.XA CN111256000B (en) | 2020-02-25 | 2020-02-25 | Stop device suitable for radar azimuth rotation surpasses 180 degrees |
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|---|---|---|---|
| CN202010116551.XA CN111256000B (en) | 2020-02-25 | 2020-02-25 | Stop device suitable for radar azimuth rotation surpasses 180 degrees |
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| CN111256000B CN111256000B (en) | 2021-05-18 |
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| CN111256000B (en) | 2021-05-18 |
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Inventor after: Nan Jianghong Inventor after: Shi Xueli Inventor after: Liu Jiankun Inventor after: Yang Zhen Inventor before: Nan Jianghong Inventor before: Shi Xueli Inventor before: Liu Jiankun Inventor before: Yang Zhen |
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