CN111058722B - Linkage mechanism for opening and closing door of experimental box on material cabin outer exposure device - Google Patents
Linkage mechanism for opening and closing door of experimental box on material cabin outer exposure device Download PDFInfo
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- CN111058722B CN111058722B CN201911421637.7A CN201911421637A CN111058722B CN 111058722 B CN111058722 B CN 111058722B CN 201911421637 A CN201911421637 A CN 201911421637A CN 111058722 B CN111058722 B CN 111058722B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F17/00—Special devices for shifting a plurality of wings operated simultaneously
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
- E05F15/616—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms
- E05F15/619—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms using flexible or rigid rack-and-pinion arrangements
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F17/00—Special devices for shifting a plurality of wings operated simultaneously
- E05F2017/008—Special devices for shifting a plurality of wings operated simultaneously for swinging wings
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2201/00—Constructional elements; Accessories therefore
- E05Y2201/60—Suspension or transmission members; Accessories therefore
- E05Y2201/622—Suspension or transmission members elements
- E05Y2201/644—Flexible elongated pulling elements; Members cooperating with flexible elongated pulling elements
- E05Y2201/654—Cables
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2201/00—Constructional elements; Accessories therefore
- E05Y2201/60—Suspension or transmission members; Accessories therefore
- E05Y2201/622—Suspension or transmission members elements
- E05Y2201/644—Flexible elongated pulling elements; Members cooperating with flexible elongated pulling elements
- E05Y2201/658—Members cooperating with flexible elongated pulling elements
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Abstract
The invention relates to a door opening and closing linkage mechanism of an experimental box on a material cabin outer exposure device, which comprises a plurality of experimental boxes and a linkage driving device, wherein each experimental box is provided with a door opening and closing device, the door opening and closing devices are connected in series and are connected with the linkage driving device, and the linkage driving device drives the door opening and closing devices to open or close the corresponding experimental box in sequence; the linkage driving device is connected with the plurality of switch door devices in series, so that the linkage driving device controls the switches of the plurality of experimental boxes, and the linkage design can save a large amount of power consumption, weight and volume resources and reduce the cost; and each experimental box is opened and closed in sequence, so that the condition that the linkage driving device is stressed too much at one time when the experimental boxes are opened or closed simultaneously is avoided.
Description
Technical Field
The invention relates to the field of material extravehicular exposure experiment devices, in particular to a door opening and closing linkage mechanism of an experiment box on a material extravehicular exposure device.
Background
In space science research, the use of various materials, particularly new materials, is not isolated. The material space environment exposure experiment aims at researching the service behavior of the material under the action of space special environment effect.
1. Influence of space environment on mechanism reliability
The differences in the operation of space machines with respect to machines operating on the ground are mainly due to the space environment, which differs from the ground environment in terms of space dynamics.
1.1 influence of the spatial Environment
(1) Influence of microgravity
Because the existing spacecraft is usually installed and adjusted on the ground, namely under the action of gravity, when the spacecraft enters the space, the environment of the spacecraft is a microgravity environment, and the gravity in the installation and adjustment process can be released and deformed. The friction between the parts is reduced, the system is in a free state, and the interference from the outside is more prominent. Microgravity has less impact on typical mechanisms but more impact on some release mechanisms, such as the hold-down mechanism in a solar array.
(2) Influence of pressure difference
The influence of the pressure difference is usually 1X 10-2Pa～1×10-5Pa, and when a sealing structure exists in the spacecraft, the internal and external difference of the sealing structure is increased, so that the structure is deformed or damaged.
(3) Influence of vacuum outgassing
Adsorbed or absorbed gases exist on the surface of the material and are dissolved in the material, and the gases are released under the vacuum degree higher than 1 x 10 < -2 > Pa, namely vacuum gas release. The released gases re-condense on the cryogenic components, contaminating the optical lens, the sensor and the optically selective thermal control coating, resulting in reduced optical performance, increased solar absorption and increased temperature.
(4) Influence of radiation heat transfer
In a vacuum environment, radiative heat transfer is the primary form of heat transfer from the spacecraft to the environment. Thus, the radiative properties of the surface material have a significant impact on the thermal control function. When each system and mechanism of the spacecraft cannot work in a reasonable temperature range, the structural parts can generate stress, deformation and even fracture due to the change of the environmental temperature, so that the mechanism of the spacecraft is damaged.
(5) Effects of adhesion and Cold welding
Adhesion and cold welding typically occur at a pressure of 1X 10-7And Pa or above. On the ground, the solid surface always adsorbs organic and other films, which are called boundary lubrication lubricants, which function to reduce the friction coefficient. In a vacuum environment, a solid surface film, when partially or completely removed, forms a clean material surface between the parts in contact, and a different degree of adhesion, called sticking, occurs. If the oxidation is removedThe film can make the surface reach atomic cleanness, and can be further integrally adhered under the action of certain pressure and temperature, namely cold welding is formed.
The main method for preventing cold welding is to select mating materials which are not easy to generate cold welding, adopt solid lubrication, grease lubrication or liquid lubricant, coat material film layers which are not easy to generate cold welding and the like.
(6) Microstellar and space debris
The space environment has micro-stars and various space fragments generated by human space activities, and because the micro-stars and the space fragments have higher speed and kinetic energy, even a small fragment collides with a spacecraft, the equipment is likely to be out of order. Therefore, spacecraft should provide enhanced protection against micrometeors and space debris.
(7) Environmental impact of solar radiation
Mechanical forces are generated by mechanical structural parts due to solar radiation, and particularly, the thermal bending effect caused by uneven heating is the largest, so that the structure generates low-frequency vibration. In addition, the change of temperature has a great influence on the selection of the lubricant in the mechanism, and the lubricant with good temperature change resistance needs to be selected.
(8) Cold and black environmental impact
The cold and black environment refers to an environment in which the radiation of the sun and the spacecraft is not considered, and the heat radiation of the spacecraft is completely absorbed by the space and is not reflected. The cold and black environment easily causes the stretching performance of the retractable mechanism on the spacecraft, influences the performance of certain organic materials, causes the aging and embrittlement of the materials and the like.
2. Basic method for improving reliability of mechanism
(1) Simplified design
The more complex the structure, the more likely faults occur, so for the design of the mechanism, the complex and meaningless design should be avoided, and the structure is simple and efficient as much as possible.
(2) Redundancy design
The redundancy design improves the reliability of the system by adopting a mode of repeatedly allocating resources, and key functional components adopt a redundancy design method to improve the reliability. For example, in the focusing mechanism, the reliability of the focusing mechanism can be improved by using a structural design mode of double motors and double encoders; the redundancy design of double igniters is adopted in the initiating explosive mechanism to improve the reliability. The redundancy design is a method for improving the reliability of the system at the cost of increasing the quality, volume, cost and power consumption of the system, and the method is used comprehensively, and comprehensively considers, analyzes and balances advantages and disadvantages when in specific use.
(3) Lubrication design
The lubrication design needs to fully consider various environments experienced by the mechanism, such as ground transportation, rocket launching, on-orbit work and the like, comprehensively consider the performance of part materials, and select a proper lubrication mode to ensure effective lubrication of the mechanism and ensure the reliability of the mechanism.
(4) Margin design
Margin design, that is, safety margin design, is designed to leave margin in the aspects of precision, strength and the like of a designed product. Because the performance, the processing precision, the assembly precision, the personnel operation and the like of the material have certain uncertainty and the aerospace cost is higher, the product is subjected to margin design, certain hidden risks can be avoided, and the reliability of the system is improved.
(5) Thermal design
The thermal design is based on the thermal environment in the life cycle of the product, and adopts various methods to reduce the heat exchange between the product and the outside and reduce the influence of thermal stress on the product. The thermal design mainly comprises two aspects, namely, the structure is subjected to active thermal control or passive thermal control, the temperature of the environment where the product is located is controlled, and thermal stress generated by the surface with overlarge temperature change is avoided; and secondly, reasonable design is adopted, and the matching of materials and the clearance of a kinematic pair are controlled to reduce the influence of thermal stress on the product.
(6) Electrostatic protection design
For mechanisms with electrostatic protection requirements, such as mechanisms containing electronic components and initiating explosive devices, electrostatic protection design is required, and the components are damaged or the initiating explosive devices are mistakenly detonated by stray current and mistakenly operated.
(7) Seal design
Some mechanisms on the spacecraft need to be designed in a sealing mode, such as liquid lubricant sealing of a high-speed bearing, a pneumatic mechanism or a hydraulic mechanism and the like. These mechanisms, once leaking, can have considerable consequences. The complexity of the space environment can cause the aging of the sealing material and the reduction of the sealing performance, so the sealing design is also an important content of the reliability design of the spacecraft.
(8) Reliability test
Because the aerospace cost is huge, a reliability test needs to be carried out on key functional parts, the reliability of the key functional parts is verified through the test, and meanwhile, the design work can be guided according to the test result.
In the material extravehicular exposure platform, the material extravehicular exposure experimental box provides an installation space and an exposure environment for various materials and provides a closed protection environment for the materials when necessary. In order to reduce the on-orbit operation of astronauts, the material experiment box is required to be designed into an opening and closing door capable of being automatically opened and closed; meanwhile, under the condition of limited resources such as power consumption, weight, volume and the like, how to realize small occupied space needs to be considered.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a linkage mechanism for opening and closing a door of an experimental box on a material cabin outer exposure device, so as to solve at least one of the technical problems.
The technical scheme for solving the technical problems is as follows: the utility model provides a material cabin exposes experimental box switch door link gear on device, includes a plurality of experimental boxes and a linkage drive device, installs switch door gear on every experimental box respectively, and a plurality of switch door gear are connected in series and are connected with the linkage drive device, and the linkage drive device drives a plurality of switch door gear and opens or close corresponding experimental box in proper order.
The invention has the beneficial effects that: the automatic opening and closing of the experiment box is realized through the door opening and closing device; the linkage driving device is connected with the plurality of switch door devices in series, so that the linkage driving device controls the switches of the plurality of experimental boxes, and a large amount of power consumption, weight and volume resources can be saved due to the linkage design; and each experimental box is opened and closed in sequence, so that the condition that the linkage driving device is stressed too much at one time when the experimental boxes are opened or closed simultaneously is avoided.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, each experiment box comprises a box door and a box body which are hinged; the door opening and closing device comprises a gear and a driving rack, and the gear is connected with the door; each driving rack is provided with a swing door rack section, and when the swing door rack section moves to a preset position, the swing door rack section is meshed with the gear to drive the gear to rotate, so that the box door is driven to rotate, and the opening or closing of the box door is realized;
according to the sequence of opening or closing the experiment box, the distance between the initial position of the plurality of swing door rack segments and the corresponding preset position is gradually increased;
the linkage driving device drives the driving racks of the plurality of experiment boxes to move, so that the swing door rack sections of the plurality of experiment boxes sequentially move to be meshed with the corresponding gears, and the plurality of experiment boxes are sequentially opened or closed.
The beneficial effect of adopting the further scheme is that: the linkage driving device drives the driving rack to move, and the moving driving rack drives the gear to rotate so as to drive the box door to rotate and realize opening and closing of the box door and the box body; simultaneously through setting up the swing door rack section at the drive rack, only the meshing back of swing door rack section, the drive rack of removal just can drive the gear revolve, and when current experimental box rotated to the chamber door and closed, the swing door rack section of back experimental box approached the gear that corresponds.
Further, the linkage driving device comprises a driving mechanism, a transmission shaft, a winding mechanism, a central shaft, a positioning shell, a first steel wire rope joint, a second steel wire rope joint and a steel wire rope, wherein the central shaft is fixedly arranged in the positioning shell, the transmission shaft is rotatably arranged in the positioning shell, and the central shaft and the transmission shaft are coaxially arranged; the winding mechanism is arranged in the positioning shell, one end of the winding mechanism is in threaded connection with the central shaft, and the other end of the winding mechanism is in splined connection with the transmission shaft;
the first steel wire rope joint and the second steel wire rope joint are respectively fixedly arranged on the outer side wall of the positioning shell and are communicated with the inside of the positioning shell;
the middle part of the steel wire rope is used for connecting and fixing the plurality of driving racks in series, and two ends of the steel wire rope penetrate into the positioning shell from the first steel wire rope joint and the second steel wire rope joint respectively and are wound on the winding mechanism respectively;
the driving mechanism drives the transmission shaft to rotate, drives the winding mechanism to rotate and axially move along the central shaft and the transmission shaft, so that the steel wire rope moves to drive the plurality of driving racks to move, and the wire outlet length or the wire inlet length of the first steel wire rope joint is equal to the wire inlet length or the wire outlet length of the second steel wire rope joint.
The beneficial effect of adopting the further scheme is that: the middle part of the steel wire rope is connected with the driving rack, and the moving steel wire rope drives the driving rack to move; the central shaft is fixedly arranged in the positioning shell, and the positioning shell provides a positioning and fixing foundation for the central shaft; the winding mechanism is connected with the transmission shaft through a spline, the transmission shaft only transmits power and torque, and the axial movement freedom degree of the winding mechanism on the transmission shaft is released; the driving mechanism drives the transmission shaft to rotate and drives the winding mechanism to rotate, and the winding mechanism rotates under the rotation action of the transmission shaft and simultaneously moves along the axial directions of the central shaft and the transmission shaft as the winding mechanism is in threaded connection with the central shaft and the position of the central shaft is fixed; the wire winding mechanism is wound with a steel wire rope, one side of the steel wire rope on the rotating wire winding mechanism extends out or contracts from the first steel wire rope joint, and the other side of the steel wire rope on the rotating wire winding mechanism contracts or extends out from the second steel wire rope joint; meanwhile, the winding mechanism moves linearly while rotating, so that the distance difference between the first steel wire rope joint and the second steel wire rope joint when the steel wire rope stretches can be compensated, the wire outlet length or the wire inlet length of the first steel wire rope joint is equal to the wire inlet length or the wire outlet length of the second steel wire rope joint, namely, the length of the middle part of the steel wire rope between the first steel wire rope joint and the second steel wire rope joint is kept unchanged, the tensioning state of the steel wire rope is kept, and the acting force on the driving rack is kept.
Further, the winding mechanism comprises a first winding wheel and a second winding wheel, the first winding wheel is in threaded connection with the central shaft, the second winding wheel is in splined connection with the transmission shaft, and the first winding wheel is fixedly connected with the second winding wheel; two ends of the steel wire rope are respectively wound on the first rope winding wheel and the second rope winding wheel.
The beneficial effect of adopting the further scheme is that: the two end points of the steel wire rope can be conveniently fixed by being conveniently disassembled and assembled, and the whole strength of the winding mechanism can be improved by being divided into two winding wheels which are fixedly connected.
Furthermore, the first rope winding wheel and the second rope winding wheel are respectively provided with the same thread winding grooves; two ends of the steel wire rope are respectively wound along the thread winding grooves, and the winding directions are opposite.
The beneficial effect of adopting the further scheme is that: the outgoing line length is equal to the incoming line length.
Furthermore, the linkage driving device also comprises a driving shell, and the driving shell is fixedly connected and communicated with the positioning shell; the driving mechanism is arranged in the driving shell, and one end of the transmission shaft, which is far away from the winding mechanism, extends into the driving shell and is in transmission connection with the driving mechanism.
The beneficial effect of adopting the further scheme is that: the drive shell provides positioning and fixing for the transmission shaft, so that the transmission shaft only rotates, and the axial degree of freedom of the transmission shaft is limited.
The linkage driving device further comprises a driving cover and a clamping block, the driving cover is sleeved on the transmission shaft and is fixedly connected with the driving shell, and the clamping block is arranged between the driving cover and the transmission shaft and is fixedly connected with the driving cover; the periphery side of transmission shaft inwards caves in and forms annular joint recess, is equipped with the joint arch on the fixture block, and the joint is protruding and joint recess adaptation joint.
The beneficial effect of adopting the further scheme is that: realize the spacing and rotatable of joint of transmission shaft.
Furthermore, the door opening and closing device further comprises a limiting shell, a limiting groove is formed in the limiting shell, a limiting protrusion is arranged on the driving rack, and the limiting protrusion is matched with the limiting groove and is in sliding connection with the limiting groove.
The beneficial effect of adopting the further scheme is that: the limiting groove provides guiding and positioning for the movement of the driving rack.
Furthermore, the two ends of the limiting groove are provided with limiting blocks, and the limiting blocks are provided with threading holes for the steel wire rope to pass through.
The beneficial effect of adopting the further scheme is that: limiting the limit angle of the door opening.
Furthermore, the door opening and closing device also comprises a driving rotating shaft and a driving block, wherein the driving rotating shaft is fixedly connected with the gear; the driving block is fixedly connected with the driving rotating shaft; the driving block is strip-shaped and is embedded on the box door.
The beneficial effect of adopting the further scheme is that: the connection between the gear and the box door is realized.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a partial schematic view of the door opening and closing device of the present invention;
FIG. 4 is a schematic view of the drive rack of the present invention;
FIG. 5 is an exploded view of a portion of the components of the cable drive assembly of the present invention;
FIG. 6 is a schematic view of the cable drive assembly of the present invention;
fig. 7 is a schematic diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
10. the experimental box comprises a laboratory box body 110, a box door 120 and a box body;
500. the door opening and closing device comprises a door opening and closing device body 510, a gear 520, a driving rack 521, a revolving door rack section 530, a limiting shell 531, a limiting protrusion 532, a rope clamping groove 550, a limiting block 551, a threading hole 560, a driving rotating shaft 570 and a driving block;
700. the steel wire rope clamping device comprises a steel wire rope driving component 710, a driving mechanism 720, a transmission shaft 721, a clamping groove 731, a first rope winding wheel 732, a second rope winding wheel 740, a central shaft 750, a positioning shell 760A, a first steel wire rope connector 760B, a second steel wire rope connector 770, a steel wire rope 780, a driving shell 781, a driving cover 782, a clamping block 783 and a clamping protrusion;
800. and installing a bracket on the rail.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1 to 7, the experimental box door opening and closing linkage mechanism on the material extravehicular exposure device comprises a plurality of experimental boxes 10 and a linkage driving device 700, wherein each experimental box 10 is provided with a door opening and closing device 500, the door opening and closing devices 500 are connected in series and are connected with the linkage driving device 700, and the linkage driving device 700 drives the door opening and closing devices 500 to open or close the corresponding experimental boxes 10 in sequence.
The automatic opening and closing of the experiment box 10 is realized through the door opening and closing device 500; the linkage driving device 700 is connected with the plurality of door opening and closing devices 500 in series, so that the linkage driving device 700 controls the opening and closing of the plurality of experimental boxes 10, and the linkage design can save a large amount of power consumption, weight and volume resources and save the cost; and each experimental box 10 is opened and closed in sequence, so that the condition that the linkage driving device 700 is stressed too much once when the experimental boxes are opened or closed simultaneously is avoided, and resources and energy are saved simultaneously.
As shown in FIGS. 1-7, the linkage mechanism of the open and close of the experimental box on the material extravehicular exposure device comprises a box door 110 and a box body 120, wherein the open and close device 500 comprises a gear 510 and a driving rack 520, and the gear 510 is connected with the box door 110; each driving rack 520 is provided with a swing door rack section 521, and when the swing door rack section 521 moves to a preset position, the swing door rack section is meshed with the gear 510 to drive the gear 510 to rotate, so that the box door 110 is driven to rotate, and the opening or closing of the box door 110 is realized;
according to the sequence of opening or closing the experiment box, the distance between the initial position of the plurality of swing door rack segments and the corresponding preset position is gradually increased;
the linkage driving device 700 drives the driving racks 520 of the plurality of experiment boxes 10 to move, so that the swing rack segments 521 of the plurality of experiment boxes 10 sequentially move to be meshed with the corresponding gears 520, and the plurality of experiment boxes 10 are sequentially opened or closed.
The linkage driving device 700 drives the driving rack 520 to move, and the moving driving rack 520 drives the gear 510 to rotate, so as to drive the box door 110 to rotate, and thus, the opening and closing of the box door 110 and the box body 120 are realized; meanwhile, the swing rack segment 521 is arranged on the driving rack 520, only after the swing rack segment 521 is meshed, the moving driving rack 520 can drive the gear 510 to rotate, and when the previous experiment box 10 rotates to close the box door 110, the swing rack segment 521 of the next experiment box 10 approaches to the corresponding gear 510.
As shown in fig. 1 to 7, a linkage mechanism for opening and closing a door of an experimental box on a material cabin outer exposure device, wherein a linkage driving device 700 comprises a driving mechanism 710, a transmission shaft 720, a winding mechanism, a central shaft 740, a positioning shell 750, a first steel wire rope connector 760A, a second steel wire rope connector 760B and a steel wire rope 770, the central shaft 740 is fixedly arranged in the positioning shell 750, the transmission shaft 720 is rotatably arranged in the positioning shell 750, and the central shaft 740 and the transmission shaft 720 are coaxially arranged; the winding mechanism is arranged in the positioning shell 750, one end of the winding mechanism is in threaded connection with the central shaft 740, and the other end of the winding mechanism is in splined connection with the transmission shaft 720;
the first wire rope connector 760A and the second wire rope connector 760B are respectively fixedly arranged on the outer side wall of the positioning shell 750 and are communicated with the inside of the positioning shell 750;
the plurality of driving racks are connected in series and fixed in the middle of the steel wire rope, and two ends of the steel wire rope 770 penetrate into the positioning shell 750 from the first steel wire rope joint 760A and the second steel wire rope joint 760B respectively and are wound on the winding mechanism respectively;
the driving mechanism 710 drives the transmission shaft 720 to rotate, drives the winding mechanism to rotate and move along the central axis 740 and the axial direction of the transmission shaft 720, so that the steel wire 770 moves to drive the plurality of driving racks 520 to move, and the outgoing length or incoming length of the first steel wire rope connector 760A is equal to the incoming length or outgoing length of the second steel wire rope connector 760B.
The steel cable 770 is not shown in fig. 1 and 2.
The central shaft 740 is fixedly arranged in the positioning shell 750, and the positioning shell 750 provides a positioning and fixing foundation for the central shaft 740; the winding mechanism is in splined connection with the transmission shaft 720, the transmission shaft 720 only transmits power and torque, and meanwhile, the axial movement freedom degree of the winding mechanism on the transmission shaft 720 is released; the driving mechanism 710 drives the transmission shaft 720 to rotate to drive the winding mechanism to rotate, and the winding mechanism rotates under the rotation action of the transmission shaft 720 and moves along the axial directions of the central shaft 740 and the transmission shaft 720 simultaneously because the winding mechanism is in threaded connection with the central shaft 740 and the position of the central shaft 740 is fixed; the wire rope 770 is wound on the winding mechanism, one side of the wire rope 770 on the rotating winding mechanism extends out or contracts from the first wire rope connector 760A, and the other side of the wire rope 770 on the rotating winding mechanism contracts or extends out from the second wire rope connector 760B; meanwhile, the winding mechanism moves linearly while rotating, so that the distance difference between the steel wire rope 770 and the first steel wire rope joint 760A and the second steel wire rope joint 760B during expansion and contraction can be compensated, the outgoing length or the incoming length of the first steel wire rope joint 760A is equal to the incoming length or the outgoing length of the second steel wire rope joint 760B, the total length of the steel wire rope 770 outside the two steel wire rope joints is ensured to be constant, the tension degree is kept, the acting force on the driving rack is kept, and linkage driving is facilitated.
Specifically, one end of the transmission shaft 720 connected with the winding mechanism is designed as a square rectangular key for transmitting torque; simultaneously, the axial movement freedom degree of the winding mechanism on the transmission shaft 720 is released; in the transmission process, the winding mechanism slides up and down along with the movement of the steel wire rope.
As shown in fig. 1 to 7, a door opening and closing linkage mechanism of an experimental box on a material cabin outer exposure device, a winding mechanism comprises a first winding wheel 731 and a second winding wheel 732, the first winding wheel 731 is in threaded connection with a central shaft 740, the second winding wheel 732 is in splined connection with a transmission shaft 720, and the first winding wheel 731 and the second winding wheel 732 are fixedly connected; both ends of the wire rope are wound around the first and second rope winding wheels 731 and 732, respectively.
The two end points of the steel wire rope can be conveniently fixed by being conveniently disassembled and assembled, and the whole strength of the winding mechanism can be improved by being divided into two winding wheels which are fixedly connected.
Specifically, as shown in fig. 1, an insertion protrusion is extended from a lower portion of the first rope winding wheel 731, and the insertion protrusion is inserted into the second rope winding wheel 732 to realize centering of the first rope winding wheel 731 and the second rope winding wheel 732, and then the first rope winding wheel 731 and the second rope winding wheel 732 are fixedly connected by a long bolt, which is inserted into the second rope winding wheel 732 through the first rope winding wheel 731.
Specifically, two end points of the wire rope are fastened to the first and second rope winding wheels 731 and 732, respectively.
As shown in fig. 1 to 7, in a linkage mechanism for opening and closing a door of an experimental box on a material cabin outer exposure device, the first rope winding wheel 731 and the second rope winding wheel 732 are respectively provided with the same thread winding grooves; two ends of the steel wire rope are respectively wound along the thread winding grooves, and the winding directions are opposite.
The two ends of the steel wire rope are wound in opposite directions on the first reel and the second reel. The outgoing line length is equal to the incoming line length.
The first rope winding wheel 731 is connected with the spline shaft of the transmission shaft 720, receives power transmitted by the spline shaft, moves along with the steel wire rope and moves up and down on the spline shaft; the second rope winding wheel 732 is fixedly connected with the first rope winding wheel 731 through a screw, and the second rope winding wheel 732 correspondingly rotates or ascends and descends in the rotating and ascending and descending processes of the first rope winding wheel 731; when one reel winds the wire rope, the other reel releases the wire rope, i.e., the wire rope enters or exits at the first wire rope connector 760A, while entering or exiting at the second wire rope connector 760B; and the outgoing length is ensured to be equal to the incoming length.
As shown in fig. 1-7, the linkage mechanism for opening and closing the door of the experimental box on the material extravehicular exposure device further comprises a driving shell 780, wherein the driving shell 780 is fixedly connected and communicated with a positioning shell 750; the driving mechanism is disposed in the driving housing, and one end of the transmission shaft 720 far away from the winding mechanism extends into the driving housing 780 and is in transmission connection with the driving mechanism.
The drive housing 780 provides a fixed position for the drive shaft 720, allowing the drive shaft 720 to rotate only, limiting the axial degree of freedom of the drive shaft 720.
As shown in fig. 1 to 7, the linkage mechanism for opening and closing the door of the upper experiment box of the material extravehicular exposure device further includes a driving cover 781 and a fixture block 782, wherein the driving cover 781 is sleeved on the transmission shaft 720 and is fixedly connected with the driving shell 780, and the fixture block 782 is arranged between the driving cover 781 and the transmission shaft 720 and is fixedly connected with the driving cover 781; the periphery of transmission shaft 720 is inwards sunken to form annular joint recess 721, is equipped with joint arch 783 on fixture block 782, joint arch 783 and joint recess 721 adaptation joint.
Realize the spacing and rotatable of joint of transmission shaft 720.
As shown in FIGS. 1-7, a linkage mechanism for opening and closing a door of an experimental box on a material extravehicular exposure device, a driving mechanism 710 is a worm gear motor. Providing motion and power
Specifically, the worm and gear motor comprises a motor, a worm and a worm gear, wherein the worm is connected to the output end of the motor, and the worm gear is connected with the worm. The transmission shaft 720 is inserted into the center of the turbine and connected by a flat key. The motor output motion and power are transmitted to the transmission shaft 720 while changing the transmission direction.
As shown in fig. 1-7, the door opening and closing device 500 of the experimental box door opening and closing linkage mechanism on the material cabin outer exposure device further comprises a limiting shell 530, a limiting groove is formed on the limiting shell 530, a limiting protrusion 531 is arranged on the driving rack, and the limiting protrusion 531 is matched with the limiting groove and is in sliding connection with the limiting groove.
Specifically, as shown in fig. 3, the gear 510 is rotatably mounted in a cavity of a limiting housing 530, and the limiting slot provides a guide and a location for the movement of the driving rack 520.
The position limiting housing 520 is fixedly connected to a base (not shown) of the on-rail mounting bracket 800.
The test cassettes of figures 1 and 2 are each mounted on an on-rail mounting bracket 800.
Specifically, as shown in fig. 4, a rope clamping groove 532 is formed in the driving rack 520, a knot is fixed on the steel wire rope 770, and the knot is clamped with the rope clamping groove 532, so that the steel wire rope 770 is fixedly connected with the driving rack 520, and the connection is simple, easy to install and disassemble.
As shown in fig. 1-7, in the linkage mechanism for opening and closing the door of the experimental box on the material cabin outer exposure device, two ends of a limiting groove are provided with limiting blocks 550, and the limiting blocks 550 are provided with threading holes 551 through which steel wire ropes 770 pass. Limiting the angle at which the door opens.
As shown in fig. 1-7, the linkage mechanism for opening and closing the door of the experimental box on the material cabin outer exposure device further comprises a driving rotating shaft 560 and a driving block 570, wherein the driving rotating shaft 560 is fixedly connected with a gear 510; the driving block 570 is fixedly connected with the driving rotating shaft 560; the driving block 570 is a strip and is embedded in the door 110. The coupling of the gear 510 with the door 110 is accomplished.
As shown in FIG. 7, four experiment boxes 10 and a linkage driving device 700 are arranged on a material extravehicular exposure experiment device, and a door opening and closing device 500 is respectively arranged at the bottom of each experiment box 10.
The distances from the rotary rack sections 521 to the gears 510 of the plurality of experiment boxes 10 are sequentially increased, and when the rotary rack section 521 of one experiment box 10 is meshed with the corresponding gear 510, the driving racks 520 of the other experiment boxes 10 are not meshed with the gears 510, so that the door opening and closing operation of only one experiment box 10 is realized.
After the previous experiment box 10 completes the door opening and closing action, the rotating rack section 521 is no longer meshed with the gear 510 and gradually moves away from the corresponding gear 510; meanwhile, the rotating rack section 521 of the next experiment box 10 rotates to be meshed with the corresponding gear 510, and the door opening and closing actions are started, and so on, and finally the door opening or closing of a plurality of experiment boxes 10 is realized in sequence. Meanwhile, the door of each experimental box 10 is opened and closed without manual operation of an astronaut, so that extra-cabin operation of the astronaut is reduced; the steel wire rope 770 is used, so that the device has strong adaptability to the layout of a host, occupies small space, has light weight and saves resources; the thin steel wire rope has extremely high strength and small occupied space; and the deformation of the steel wire rope is small along with the change of temperature difference, so that the winding mechanism is prevented from being blocked at high and low temperatures.
Specifically, a bead hitting groove is formed in one vertical side wall of the box door, a first spring bead hitting is arranged on one vertical side wall of the rail mounting bracket, and the first spring bead hitting is matched with the bead hitting groove; when the box door rotates to a preset position, the ball collision groove is in adaptive clamping connection with a first spring ball collision on the rail mounting support.
The ball collision groove and the first spring ball collision adaptive clamping realize the limiting and the positioning of the opening limit position of the box door, and the box door limiting and positioning device is simple in structure and reliable in positioning.
In the description herein, reference to the terms "embodiment one," "embodiment two," "example," "specific example," or "some examples," etc., means that a particular method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, methods, apparatuses, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A linkage mechanism for opening and closing a door of an experimental box on a material cabin outer exposure device is characterized by comprising a plurality of experimental boxes and a linkage driving device, wherein a door opening and closing device is respectively installed on each experimental box, the door opening and closing devices are connected in series and are connected with the linkage driving device, and the linkage driving device drives the door opening and closing devices to sequentially open or close the corresponding experimental boxes;
each experiment box comprises a box door and a box body which are hinged; the door opening and closing device comprises a gear and a driving rack, and the gear is connected with the box door; every all be equipped with swing door rack section on the drive rack, when the swing door rack section removed preset position, with gear engagement drives the gear revolve, and then drives the chamber door rotates, realizes opening or closing of chamber door.
2. The material extravehicular exposure apparatus upper experimental box door opening and closing linkage mechanism according to claim 1,
according to the sequence of opening or closing the experiment box, the distance between the initial position of the plurality of swing door rack segments and the corresponding preset position is gradually increased;
the linkage driving device drives the driving racks of the experimental boxes to move, so that the rack sections of the revolving doors of the experimental boxes move to be meshed with the corresponding gears in sequence, and the experimental boxes are opened or closed in sequence.
3. The material extravehicular exposure apparatus upper experimental box door opening and closing linkage mechanism according to claim 1, wherein the linkage driving device comprises a driving mechanism, a transmission shaft, a winding mechanism, a central shaft, a positioning shell, a first steel wire rope joint, a second steel wire rope joint and a steel wire rope, the central shaft is fixedly arranged in the positioning shell, the transmission shaft is rotatably arranged in the positioning shell, and the central shaft and the transmission shaft are coaxially arranged; the winding mechanism is arranged in the positioning shell, one end of the winding mechanism is in threaded connection with the central shaft, and the other end of the winding mechanism is in splined connection with the transmission shaft;
the first steel wire rope joint and the second steel wire rope joint are respectively fixedly arranged on the outer side wall of the positioning shell and are communicated with the inside of the positioning shell;
the driving racks are connected in series and fixed in the middle of the steel wire rope, and two ends of the steel wire rope penetrate into the positioning shell from the first steel wire rope joint and the second steel wire rope joint respectively and are wound on the winding mechanism respectively;
the driving mechanism drives the transmission shaft to rotate, drives the winding mechanism to rotate and move along the central shaft and the axial direction of the transmission shaft, so that the steel wire ropes move to drive the plurality of driving racks to move, and the wire outgoing length or the wire incoming length of the first steel wire rope joint is equal to the wire incoming length or the wire outgoing length of the second steel wire rope joint.
4. The material extravehicular exposure apparatus upper experimental box door opening and closing linkage mechanism according to claim 3, wherein the winding mechanism comprises a first winding wheel and a second winding wheel, the first winding wheel is in threaded connection with the central shaft, the second winding wheel is in splined connection with the transmission shaft, and the first winding wheel is fixedly connected with the second winding wheel; and two ends of the steel wire rope are respectively wound on the first rope winding wheel and the second rope winding wheel.
5. The experimental box door opening and closing linkage mechanism on the material extravehicular exposure device, according to claim 4, characterized in that the first rope winding wheel and the second rope winding wheel are respectively provided with the same thread winding groove; and two ends of the steel wire rope are respectively wound along the thread winding grooves, and the winding directions are opposite.
6. The material extravehicular exposure apparatus upper experiment box door opening and closing linkage mechanism according to claim 3, wherein the linkage driving device further comprises a driving shell fixedly connected and communicated with the positioning shell; the driving mechanism is arranged in the driving shell, and one end of the transmission shaft, which is far away from the winding mechanism, extends into the driving shell and is in transmission connection with the driving mechanism.
7. The material extravehicular exposure apparatus upper experiment box door opening and closing linkage mechanism according to claim 6, wherein the linkage driving device further comprises a driving cover and a fixture block, the driving cover is sleeved on the transmission shaft and is fixedly connected with the driving shell, and the fixture block is arranged between the driving cover and the transmission shaft and is fixedly connected with the driving cover; the periphery side of transmission shaft is inwards sunken to form annular joint recess of circle, it is protruding to be equipped with the joint on the fixture block, the joint protruding with joint recess adaptation joint.
8. The material extravehicular exposure apparatus upper experiment box switch door linkage mechanism according to any one of claims 2 to 7, wherein the switch door apparatus further comprises a limit housing, a limit groove is formed on the limit housing, a limit protrusion is arranged on the driving rack, and the limit protrusion is matched with and slidably connected with the limit groove.
9. The material extravehicular exposure device upper experimental box door opening and closing linkage mechanism according to claim 8, wherein two ends of the limiting groove are provided with limiting blocks, and the limiting blocks are provided with threading holes for a steel wire rope to pass through.
10. The experimental box door opening and closing linkage mechanism on the material extravehicular exposure device, according to any one of claims 2 to 7, wherein the door opening and closing device further comprises a driving rotating shaft and a driving block, and the driving rotating shaft is fixedly connected with the gear; the driving block is fixedly connected with the driving rotating shaft; the driving block is in a long strip shape and is embedded on the box door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911421637.7A CN111058722B (en) | 2019-12-31 | 2019-12-31 | Linkage mechanism for opening and closing door of experimental box on material cabin outer exposure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911421637.7A CN111058722B (en) | 2019-12-31 | 2019-12-31 | Linkage mechanism for opening and closing door of experimental box on material cabin outer exposure device |
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| CN111058722B true CN111058722B (en) | 2021-05-04 |
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| CN113464018A (en) * | 2021-07-27 | 2021-10-01 | 浙江万事兴电器有限公司 | Double door structure capable of being opened and closed synchronously |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2444039Y (en) * | 2000-04-06 | 2001-08-22 | 蔡黎平 | Opening and closing system for air-vent of electrical exhausting flue and exchanging air |
| JP4042677B2 (en) * | 2003-10-22 | 2008-02-06 | コクヨ株式会社 | Sliding door link mechanism, sliding door storage furniture |
| EP2146032B1 (en) * | 2008-07-18 | 2016-08-17 | ROTO FRANK Aktiengesellschaft | Device for opening and/or shutting and locking a closed state of a shutting device for shutting a spatial opening and shutting device with such a device |
| US8944536B2 (en) * | 2012-09-13 | 2015-02-03 | General Electric Company | Oven appliance with dual opening and closing doors |
| CN204511196U (en) * | 2015-03-06 | 2015-07-29 | 胡建令 | A kind of building decoration motor-driven folding door |
| CN204876989U (en) * | 2015-07-27 | 2015-12-16 | 宁波合力伟业消防科技有限公司 | System of windowing with sectional type structure of windowing |
| DE102017107568A1 (en) * | 2017-04-07 | 2018-10-11 | Hettich-Heinze Gmbh & Co. Kg | Furniture fitting for a sliding movement of a multipart door and furniture with such a furniture fitting |
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