Structure and method for eliminating assembly stress of a collimator host unlocker

Abstract

The application relates to a structure and method for eliminating assembly stress of a follow-up host unlocking device, relates to the stress-free assembly of an unlocking device of a follow-up host for spaceflight, and comprises a pitch gasket unit and an azimuth gasket unit; a U-shaped frame is rotationally connected to a satellite cabin plate through an azimuth shaft system, the U-shaped frame is rotationally connected with a camera main body through a pitch driving shaft system and a pitch braking shaft system; the U-shaped frame is fixed with the satellite cabin plate through an azimuth unlocking device, the azimuth gasket unit is located in a gap between the azimuth unlocking device and the satellite cabin plate, a second connecting bolt passes through the azimuth unlocking device and the azimuth gasket unit and is connected with the satellite cabin plate; the U-shaped frame is fixed with the camera main body through a pitch unlocking device, the pitch gasket unit is located in a gap between the pitch unlocking device and the camera main body, a first connecting bolt passes through the pitch unlocking device and the pitch gasket unit and is connected with the camera main body. The stress-free assembly of the unlocking device is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of stress-free assembly of an unlocking device of a tracking and sighting main machine for spaceflight, and relates to a structure and method for eliminating assembly stress of an unlocking device of a tracking and sighting main machine. BACKGROUND

[0002] The tracking and sighting main machine for space is used for high-precision tracking and monitoring of space targets, and is generally composed of a camera main body, a two-dimensional turntable mechanism and an unlocking device. The camera main body is usually composed of photoelectric imaging, detection and laser ranging modules, and realizes high-definition imaging, angle measurement and ranging of space targets. The two-dimensional turntable mechanism is composed of a U-shaped frame, an azimuth shaft system, an elevation driving shaft system and an elevation brake shaft system, and the azimuth shaft system, the elevation driving shaft system and the elevation brake shaft system are connected with the U-shaped frame through high-precision bearings. The middle part of the camera main body is fixedly connected with the elevation driving shaft system and the elevation brake shaft system on the two-dimensional turntable mechanism through the flange with a stop opening, so that the relative positional relationship remains unchanged when the camera main body rotates around the elevation shaft of the two-dimensional turntable mechanism; the flange disc of the azimuth shaft system is fixedly connected with the satellite cabin plate through screws, and the integrated body of the U-shaped frame, the elevation shaft system and the camera main body is fixedly connected with the azimuth shaft system through high-precision bearings and rotates around the azimuth shaft. The lower part of the camera main body is fixed with the middle part of the U-shaped frame through the elevation unlocking device, and the bottom of the U-shaped frame is fixed with the satellite cabin plate through the azimuth unlocking device. The unlocking device ensures that the entire tracking and sighting main machine is locked and does not move along with the satellite during the launch active stage, and plays the functions of locking and supporting. After entering the orbit, the unlocking device is unlocked and separated into two parts, releasing the rotation degrees of freedom of the elevation shaft and the azimuth shaft of the tracking and sighting main machine, so that the tracking and sighting main machine has the function of two-axis rotation in orbit.

[0003] When the unlocking device is installed, due to machining and assembly errors, there are connection surfaces that are not parallel and small gaps at the flange end surface where the flange surface of the unlocking device is connected with the camera main body and at the flange connection between the unlocking device flange and the satellite cabin plate flange. If the flange screws are forcibly tightened, assembly stress will exist, the assembly stress at the elevation unlocking device will cause the main mirror surface of the camera main body to decline, and then weaken the performance of the camera main body, and the assembly stress at the azimuth unlocking device will damage the bearings of the azimuth shaft system of the turntable, and then affect the stability of the shaft system (orthogonality) of the two-dimensional turntable mechanism.

[0004] The traditional method is to measure the value of the micro gap by using a feeler gauge, and then process a gasket with a corresponding thickness to fill the micro gap, but the feeler gauge can only measure a minimum of 0.02mm gap, and cannot measure smaller gaps and wedge-shaped gaps, so it is impossible to completely fill the micro gap, resulting in assembly stress after the installation of the gasket, and the gasket needs to be processed according to the actual thickness, and the assembly efficiency is low. The patent with publication number CN108121048A discloses a self-adaptive assembly error and launch active vibration isolation device of a space remote sensor, a series of gaskets, bushings and bolts are arranged between the flange of the remote sensor and the flange of the satellite, which enhances the vibration reduction and isolation effect of the remote sensor in the launch active stage, solves the problem that the damping truss has limited vibration reduction and isolation capacity for the remote sensor in the launch active stage; by designing a series of gasket and bushing configurations, the flatness error of the remote sensor flange and the satellite flange is reduced, and the influence of the installation stress on the main mirror surface of the remote sensor is reduced, which makes up for the defect that the damping truss cannot meet the assembly precision requirements of the remote sensor and the satellite platform. This method needs to process gaskets according to the actual measurement data during assembly, which is low in efficiency, and cannot eliminate installation stress, so it is not suitable for stress-free assembly of the unlocker. The patent with publication number CN202089198U discloses a caliper with parallelism compensation structure, which effectively compensates for the error of the IS seat parallelism by adopting the design of spherical convex gasket cooperating with spherical concave arc surface, and plays a role in compensating and positioning. Although this method eliminates the parallelism error of the IS seat, it cannot compensate for the micro gap and cannot quantify the offset generated during assembly, so it is not suitable for stress-free assembly of the unlocker. SUMMARY

[0005] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide a structure and method for eliminating the assembly stress of the follow-up sighting main machine unlocker. The structure and method compensate for the non-parallelism and micro gap between the pitch unlocker flange and the camera body connecting surface, and the azimuth unlocker flange and the satellite cabin plate mating surface, and dynamically monitor and adjust the relative displacement generated during the installation of the unlocker by using the table method, to realize stress-free assembly of the unlocker. On the one hand, the structure and method eliminate the influence of the installation stress of the pitch unlocker on the main mirror surface of the camera body, thereby ensuring the stability of the camera performance. On the other hand, the structure and method avoid damaging the bearings of the two-dimensional turntable mechanism during the assembly of the azimuth unlocker and the satellite cabin plate, thereby ensuring the stability of the two-dimensional turntable mechanism shaft system (orthogonality) during the assembly and launch of the follow-up sighting main machine, and improving the product assembly efficiency and safety.

[0006] The technical scheme provided by the present application is as follows:

[0007] The structure for eliminating assembly stress of a follow-up host unlocking device comprises a pitch gasket unit and an azimuth gasket unit; a U-shaped frame is rotatably connected to a satellite cabin plate through an azimuth shaft system, and the U-shaped frame is rotatably connected to a camera main body through a pitch driving shaft system and a pitch braking shaft system; the U-shaped frame is fixed with the satellite cabin plate through an azimuth unlocking device, the azimuth gasket unit is located in a gap between the azimuth unlocking device and the satellite cabin plate, a second connecting bolt passes through the azimuth unlocking device and the azimuth gasket unit and is connected with the satellite cabin plate; the U-shaped frame is fixed with the camera main body through a pitch unlocking device, the pitch gasket unit is located in a gap between the pitch unlocking device and the camera main body, a first connecting bolt passes through the pitch unlocking device and the pitch gasket unit and is connected with the camera main body; the pitch gasket unit comprises a pitch spherical surface combined structure and a pitch thickness adjusting structure, the pitch spherical surface combined structure comprises a pitch ball head gasket and a pitch ball socket gasket, a convex spherical surface of the pitch ball head gasket is matched with a concave spherical surface of the pitch ball socket gasket, and the pitch ball head gasket and the pitch ball socket gasket are both provided with a plane on a side away from each other; the pitch thickness adjusting structure comprises two pitch wedge-shaped gaskets, and the inclined surfaces of the two pitch wedge-shaped gaskets are matched.

[0008] The pitch ball head gasket and the pitch ball socket gasket are both provided with a pitch positioning hole for the first connecting bolt to pass through, and the diameter of the pitch positioning hole is greater than the outer diameter of the first connecting bolt.

[0009] Each of the pitch wedge-shaped gaskets is provided with a first long strip-shaped slot for the first connecting bolt to pass through along a direction in which the thickness of the pitch wedge-shaped gasket changes, and the first connecting bolt is matched with the width of the first long strip-shaped slot; when the pitch wedge-shaped gasket is pushed, the distance between the planes of the two pitch wedge-shaped gaskets changes.

[0010] The pitch spherical surface combined structure is located on a side of the pitch thickness adjusting structure away from the camera main body.

[0011] The azimuth gasket unit comprises an azimuth spherical surface combined structure and an azimuth thickness adjusting structure; the azimuth spherical surface combined structure comprises a pyrotechnic base and an azimuth ball head gasket, the pyrotechnic base is provided with a bottom flange and a connecting plane at two ends respectively, the connecting plane is used for being connected with the azimuth unlocking device, the other end of the azimuth unlocking device is connected with the U-shaped frame, the second connecting bolt passes through the bottom flange, the azimuth ball head gasket and the azimuth thickness adjusting structure and is connected with the satellite cabin plate, the bottom flange is provided with a plurality of through holes for the second connecting bolt to pass through, the surface of the bottom flange at one end of the through hole and facing the satellite cabin plate is a concave spherical surface, the convex spherical surface of the azimuth ball head gasket is matched with the position of the concave spherical surface of the bottom flange, and the other side of the azimuth ball head gasket is a plane;

[0012] The azimuth thickness adjusting structure comprises two azimuth wedge-shaped gaskets, and the inclined surfaces of the two azimuth wedge-shaped gaskets are matched.

[0013] The azimuth unlocker comprises an upper unit and a lower unit connected together, a part between the upper unit and the lower unit is internally provided with a pyrotechnic device to separate the upper unit and the lower unit after launching, both sides of the upper unit are fixedly connected with connecting lugs, and the lower unit is externally connected with a connecting flange; the connecting lug is fixedly connected with the U-shaped frame; one side of the pyrotechnic base is provided with a U-shaped recess, the U-shaped recess is located at a middle position of a connecting plane, the lower unit is clamped at the position of the U-shaped recess, and the connecting flange is located at a side of the connecting plane away from the bottom flange, and the connecting flange of the azimuth unlocker is in contact with the connecting plane and is fixed by a screw.

[0014] The four azimuth unlockers are arranged in a rectangular distribution.

[0015] Both ends of the U-shaped frame are located at both sides of the camera body, two pitch unlockers are arranged, and the two pitch unlockers are connected to two side surfaces of the camera body opposite to both ends of the U-shaped frame.

[0016] A method for assembling a structure for eliminating assembly stress of a tracking and sighting main machine unlocker, comprising:

[0017] S1: the azimuth unlocker is matched with the pyrotechnic base and is fixed, and an azimuth unlocker component is obtained;

[0018] S2: after the U-shaped frame is assembled with the camera body, the U-shaped frame is rotationally connected with the satellite cabin plate through the azimuth shaft system, the azimuth unlocker component of step S1 is matched and installed with the U-shaped frame, and is fastened by a screw, and installation of four groups of azimuth unlocker components is completed;

[0019] S3: one azimuth ball head gasket and two azimuth wedge-shaped gaskets are respectively arranged at each concave spherical surface of each pyrotechnic base, a second connecting bolt is screwed in, the second connecting bolt is not tightened, and preliminary connection and installation of the pyrotechnic base and the satellite cabin plate are completed;

[0020] S4: step S3 is repeated, and preliminary connection and installation of the remaining three groups of azimuth unlocker components and the satellite cabin plate are completed;

[0021] S5: the pitch unlocker is matched and fixed with the inner side of the U-shaped frame, a pitch ball head gasket, a pitch ball socket gasket and two pitch wedge-shaped gaskets are sequentially arranged at a gap between the pitch unlocker and the camera body, and a first connecting bolt is screwed in, the first connecting bolt is not tightened, and preliminary connection and installation of the pitch unlocker on one side of the camera body are completed;

[0022] S6: step S5 is repeated, and preliminary connection and installation of the pitch unlocker on the other side of the camera body are completed;

[0023] S7: the positions of the satellite cabin plate connected with the four azimuth decouplers are marked as 1, 3, 2 and 4 in sequence, wherein 1 and 2 are a set of diagonal positions, and 3 and 4 are a set of diagonal positions; a standard universal magnetic force table seat is installed at the diagonal positions 1 and 2 on the satellite cabin plate, and a dial indicator is installed on the table seat; the attitude of the standard universal magnetic force table seat is adjusted so that the hands of the dial indicators contact the first local plane 10c of the U-shaped frame, and the hands of the other dial indicators contact the second local plane 10d; the readings of the two dial indicators are read and recorded as X1 and X2 respectively;

[0024] S8: the three sets of paired azimuth wedge-shaped pads of the pyrotechnic base at the diagonal positions 1 and 2 are adjusted so that the azimuth wedge-shaped pads fill and squeeze the azimuth installation gap between the pyrotechnic base and the satellite cabin plate, and the readings of the two dial indicators in step S7 are observed at the same time, so that the values at this time are within the range of X1±0.003 and X2±0.003;

[0025] S9: steps S7 and S8 are repeated to fill and squeeze the three sets of paired azimuth wedge-shaped pads at the diagonal positions 3 and 4, so that the readings of the dial indicators are within the range of X3±0.003 and X4±0.003; finally, the second connecting bolts are tightened in the order of positions 1, 2, 3 and 4 to complete the installation of the azimuth decouplers;

[0026] S10: the standard universal magnetic force table seat and the dial indicators used in steps S7, S8 and S9 are removed, and 2 sets of table seats and dial indicators are fixed on the bottom plane 10j of the U-shaped frame; the standard universal magnetic force table seat is adjusted so that the hands of the dial indicators contact the two planes on the left and right sides of the camera body; the readings of the left and right dial indicators are read and recorded as Y1 and Y2 respectively;

[0027] S11: the paired pitch wedge-shaped pads in the pitch decouplers on the left and right sides are adjusted so that the paired pitch wedge-shaped pads fill and squeeze the pitch installation gap between the camera body and the pitch decouplers; the readings of the two dial indicators in step S10 are observed at the same time, so that the values at this time are within the range of Y1±0.003 and Y2±0.003; finally, the first connecting bolts are tightened.

[0028] To address the problems caused by assembly stress during the assembly of the aforementioned unlocking device, which leads to a decrease in the primary mirror shape of the camera body, damage to the bearings of the 2D turntable mechanism, and affects the stability of the 2D turntable mechanism's axis system (orthogonality), this invention designs a structure to eliminate assembly stress in the tracking and aiming host unlocking device and proposes an assembly method. This structure consists of a ball-head gasket, a ball-and-socket gasket, a wedge-shaped gasket, and a pyrotechnic base. During unlocking device assembly, one end of the pitch unlocking device is fixed to the U-shaped frame of the tracking and aiming host via a flange hole using screws. A certain width gap is left between the flange face of the other end and the flange face of the camera body support. This gap is flexibly filled by the ball-head gasket, ball-and-socket gasket, and wedge-shaped gasket, and then the azimuth unlocking device is rigidly fixed using screws. One end of the azimuth unlocker is fixed to the U-shaped frame of the tracking and aiming main unit via a flange hole and screws. The flange face of the other end is fixed to the flange face of the pyrotechnic base. A certain width gap is left between the end face of the pyrotechnic base and the satellite compartment panel. This gap is flexibly filled by ball-head washers and wedge-shaped washers, and then the azimuth unlocker is rigidly fixed by screws. Then, the relative displacement between the U-shaped frame and the camera body (or satellite compartment panel) generated during the assembly of the unlocker is dynamically monitored and adjusted by dial gauge, thereby achieving stress-free assembly of the unlocker. This structure and method, on the one hand, eliminates the influence of the installation stress of the pitch unlocker on the primary mirror surface shape of the camera body, thus ensuring the stability of the camera's performance. On the other hand, it avoids damage to the bearings of the two-dimensional turntable mechanism during the assembly of the azimuth unlocker and the satellite compartment panel, ensuring the stability of the axis system (orthogonality) of the two-dimensional turntable mechanism during the final assembly and launch phases of the tracking and aiming main unit, improving product assembly efficiency and safety, and ultimately ensuring the successful completion of the model development task.

[0029] Compared with the prior art, the structure and method for eliminating assembly stress of the tracking host unlocker according to the present invention have beneficial technical effects, including:

[0030] 1. The structure and method of this invention utilize the structural forms of elevation shims and azimuth shims during the assembly of the tracking and aiming main unit unlocker. Combined with a dial indicator, the relative displacement generated during unlocker installation is dynamically monitored and adjusted, achieving stress-free assembly of the unlocker. This structure and method eliminate the influence of elevation unlocker installation stress on the camera's main mirror surface shape, ensuring stable camera performance. Furthermore, it avoids damage to the two-dimensional turntable mechanism bearings caused by assembly stress during the assembly of the azimuth unlocker and the satellite module, ensuring the stability of the two-dimensional turntable mechanism's axis system (orthogonality) during the tracking and aiming main unit assembly and launch phases, thus improving product assembly efficiency and safety.

[0031] 2. The structure of the present invention utilizes the structural forms of ball-head gaskets, ball-socket gaskets, and wedge-shaped gaskets to compensate for the non-parallelism and minute gaps between the pitch unlocker flange surface and the camera body connection surface, as well as between the azimuth unlocker flange surface and the satellite module mating surface.

[0032] 3. In the structure of the present application, the integrated structure of the three concave spherical surfaces on the pyrotechnic base provides the cooperation of the three ball head washers, reduces the number of ball and socket washers, and improves the connection stiffness and support stability of the azimuthal unlocker. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The left drawing is Figure 7 the enlarged view of the middle C, and the right drawing is Figure 7 the enlarged view of D of

[0034] Figure 2 is a schematic diagram of the pyrotechnic base structure according to the present application;

[0035] Figure 3 is a schematic diagram of the washer structure, where a is a schematic diagram of a ball head washer, b is a schematic diagram of a ball and socket washer, and c is a schematic diagram of a wedge washer;

[0036] Figure 4 is a schematic diagram of the feature of the installation object unlocker;

[0037] Figure 5 is a schematic diagram of the assembly structure of the pyrotechnic base and the unlocker;

[0038] Figure 6 is a schematic diagram of the composition of the follow-up sight main machine without the unlocker;

[0039] Figure 7 is a schematic diagram of the overall composition of the follow-up sight main machine after the unlocker is installed;

[0040] Figure 8 is a schematic diagram of the punch indication after the azimuthal unlocker is installed;

[0041] Figure 9 is a schematic diagram of the punch indication of the pitch unlocker.

[0042] BRIEF DESCRIPTION OF DRAWINGS: 1, camera main body; 1b, camera flange; 1c, plane; 2, two-dimensional turntable mechanism;

[0043] 3, unlocker; 31, azimuthal unlocker; 312, upper unit; 3c, connecting lug; 311, lower unit; 3a, connecting flange; 313, second connecting bolt; 32, pitch unlocker; 321, first connecting bolt;

[0044] 4, satellite cabin plate;

[0045] 5, pyrotechnic base; 5b, connecting plane; 5a, bottom flange;

[0046] 61, azimuthal ball head washer; 62, azimuthal wedge washer;

[0047] 71, pitch ball head spacer; 72, pitch ball socket spacer; 73, pitch wedge spacer;

[0048] 9, azimuth shafting; 10, U-shaped frame; middle flange 10a; four-corner flange 10b; first partial plane 10c; second partial plane 10d; bottom plane 10j;

[0049] 11, pitch driving shafting; 12, pitch shaft; 13, pitch braking shafting; 14, high-precision bearing; 15, azimuth shaft; 16, standard universal magnetic table base; 17, micrometer. DETAILED DESCRIPTION

[0050] In order to make the object, technical scheme and advantages of the present application more clear, the following will make further detailed description to the structure and method for eliminating assembly stress of a follow-sighting main machine unlocker according to the present application in combination with the drawings and specific embodiments.

[0051] The present embodiment discloses a structure for eliminating assembly stress of a follow-sighting main machine unlocker, as shown in Figure 1 and Figure 7 which comprises a pitch spacer unit and an azimuth spacer unit, and is used in the pitch shaft and azimuth shaft locking structure of a workpiece follow-sighting main machine connected to a satellite cabin plate 4.

[0052] As shown in Figure 7 , the workpiece follow-sighting main machine is composed of a two-dimensional turntable mechanism 2, a camera main body 1 and an unlocker 3, the unlocker 3 comprising an azimuth unlocker 31 and a pitch unlocker 32.

[0053] The two-dimensional turntable mechanism 2 is composed of a U-shaped frame 10, an azimuth shafting 9, a pitch driving shafting 11 and a pitch braking shafting 13, the azimuth shafting 9, the pitch driving shafting 11 and the pitch braking shafting 13 being rotationally connected to the U-shaped frame 10 through high-precision bearings 14, the rotation axes of the pitch driving shafting 11 and the pitch braking shafting 13 being collinear and forming a pitch shaft 12, the rotation axis of the azimuth shafting 9 being perpendicular to the rotation axis of the pitch driving shafting 11, the azimuth shafting 9 being rotationally connected to a satellite cabin plate 4, so that the U-shaped frame 10 is rotationally connected to the satellite cabin plate 4 through the azimuth shafting 9. The two ends of the U-shaped frame 10 are located at the two sides of the camera main body 1, the two sides of the camera main body 1 being rotationally connected to the U-shaped frame 10 through the pitch driving shafting 11 and the pitch braking shafting 13, and the camera main body 1 being rotatable relative to the U-shaped frame 10 about the axis of the pitch driving shafting 11. In the launching stage, the camera main body 1 is fixedly connected to the U-shaped frame 10 through the pitch unlocker 32, so as to realize the locking of the pitch axis 12. The U-shaped frame 10 is fixedly connected to a pyrotechnic base 5 through the azimuth unlocker 31, and then the pyrotechnic base 5 is fixedly connected to the satellite cabin plate 4, so as to realize the locking of the azimuth shaft 15. After launching, the pyrotechnics in the azimuth unlocker 31 and the pitch unlocker 32 explode, the azimuth unlocker 31 and the pitch unlocker 32 are disconnected, and the unlocking of the azimuth shaft 15 and the pitch shaft 12 is realized.

[0054] As shown in Figure 4 , Figure 6 and Figure 7 , the pitch unlocker 32 is used for the connection locking of the pitch axis between the camera body 1 and the two-dimensional turntable mechanism 2. The azimuth unlocker 31 is used for the connection locking of the azimuth axis between the two-dimensional turntable mechanism 2 and the satellite cabin plate 4. The azimuth unlocker 31 is provided with 4, and the 4 azimuth unlockers 31 are respectively located on both sides of the azimuth axis system 9, and the 4 azimuth unlockers 31 are distributed in a rectangular shape.

[0055] The pitch unlocker 32 comprises an upper unit 312 and a lower unit 311 connected together, and a part between the upper unit 312 and the lower unit 311 is internally provided with a pyrotechnic product to separate the upper unit 312 and the lower unit 311 after launch. The two sides of the upper unit 312 are fixedly connected with connecting lugs 3c, and the outside of the lower unit 311 is connected with a connecting flange 3a. The connecting lug 3c of the pitch unlocker 32 is fixedly connected with the middle flange 10a on the inside of the U-shaped frame 10, and the two sides of the camera body 1 are fixedly connected with a camera flange 1b. The connecting flange 3a of the pitch unlocker 32 is provided with a pitch gasket unit between the connecting flange 3a and the camera flange 1b, and a first connecting bolt passes through the connecting flange 3a of the pitch unlocker 32, the pitch gasket unit and the camera flange 1b in sequence and is connected with the camera flange 1b.

[0056] As shown in Figure 1 , Figure 3 and Figure 4As shown, the pitch shim unit includes a pitch ball head shim 71, a pitch ball socket shim 72, and two pitch wedge shims 73. The first connecting bolt passes sequentially through the pitch ball head shim 71, the pitch ball socket shim 72, and the two pitch wedge shims 73. The flat surface of the pitch ball head shim 71 mates with the connecting flange of the pitch unlocker 32; the convex spherical surface of the pitch ball head shim 71 mates with the concave spherical surface of the pitch ball socket shim 72; the flat surface of the pitch ball socket shim 72 mates with the flat surface of one pitch wedge shim 73; the beveled surfaces of the two pitch wedge shims 73 mate with each other; and the flat surface of the other pitch wedge shim 73 mates with the camera flange. The angle between the beveled surfaces and the flat surfaces of the two pitch ball socket shims 72 is consistent, and this angle satisfies the requirement that the two pitch ball socket shims 72 can self-lock when the first connecting bolt is tightened. Both the pitch ball joint gasket 71 and the pitch ball socket gasket 72 are provided with pitch positioning holes for the first connecting bolt to pass through. The diameter of the pitch positioning hole is larger than the outer diameter of the first connecting bolt, so that there is a gap between the pitch ball joint gasket 71 and the pitch ball socket gasket 72 and the first connecting bolt. When the relative surfaces between the connecting flange of the pitch unlocker 32 and the camera flange are not parallel, the spherical fit formed by the convex and concave spherical surfaces between the pitch ball joint gasket 71 and the pitch ball socket gasket 72 can rotate relative to each other until the planes of the pitch ball joint gasket 71 and the pitch ball socket gasket 72 can rotate to be aligned with the planes of the connecting flange of the pitch unlocker 32 and the camera flange, thereby accurately compensating for the non-parallelism between the planes of the connecting flange of the unlocker body and the camera flange. Each pitch wedge gasket 73 has a first elongated groove along the direction of its thickness variation for the first connecting bolt to pass through. This causes the distance between the planes of the two pitch wedge gaskets 73 to increase or decrease when the pitch wedge gasket 73 is pushed, thereby accurately compensating for the different sizes of gaps between the connecting flange of the unlocker body and the camera flange caused by machining errors, etc.

[0057] The structure of the azimuth unlocker 31 is the same as that of the pitch unlocker 32. The connecting lug 3c of the azimuth unlocker 31 is fixedly connected to the four corner flanges 10b of the U-shaped frame 10, and the connecting flange 3a of the azimuth unlocker 31 is connected to the satellite panel 4 and is provided with an azimuth gasket unit.

[0058] like Figure 2 and Figure 5As shown, the azimuth pad unit includes a pyrotechnic base 5, an azimuth ball head pad 61 and an azimuth wedge pad 62. The pyrotechnic base 5 is provided with a bottom flange 5a and a connecting plane 5b at two ends thereof. A U-shaped recess is arranged on one side of the pyrotechnic base 5, and the U-shaped recess is located at the middle position of the connecting plane 5b. The lower unit of the azimuth unlocker 31 is clamped in the U-shaped recess, and the connecting flange of the azimuth unlocker 31 is located on the side of the connecting plane 5b away from the bottom flange 5a, and the connecting flange 3a of the azimuth unlocker 31 is in contact with the connecting plane 5b and is fixed by a screw. The azimuth ball head pad and the azimuth wedge pad are arranged between the bottom flange 5a of the pyrotechnic base 5 and the satellite cabin plate 4. The bottom flange 5a is provided with a plurality of through holes for the second connecting bolts to pass through. In the embodiment, each bottom flange 5a has three through holes, and the surface of the bottom flange 5a at one end of the through hole and facing the satellite cabin plate 4 is a concave spherical surface. Each second connecting bolt passes through the through hole of the bottom flange 5a, one azimuth ball head pad 61 and two azimuth wedge pads 62 in sequence and is connected with the satellite cabin plate 4. The convex spherical surface of the azimuth ball head pad 61 is matched with the concave spherical surface of the surface of the bottom flange 5a, the plane on the other side of the azimuth ball head pad 61 is matched with the plane of one azimuth wedge pad 62, the planes of the two azimuth wedge pads 62 are matched, and the plane of the other azimuth wedge pad 62 is matched with the surface of the satellite cabin plate 4. The azimuth ball head pad 61 is provided with an azimuth positioning hole for the second connecting bolt to pass through, and the hole diameter of the azimuth positioning hole is greater than the diameter of the second connecting bolt. The azimuth wedge pad 62 is provided with a second long strip-shaped groove for the second connecting bolt to pass through along the direction of the change of the thickness of the azimuth wedge pad 62.

[0059] As shown in Figure 7 , during assembly, one end of the pitch unlocker 32 is fixedly connected with the U-shaped frame 10 by a screw through the connecting lug 3c, and the connecting flange 3a at the other end of the pitch unlocker 32 has a certain width of the pitch mounting gap 18 with the camera flange 1b connected to the side surface of the camera main body 1. The pitch mounting gap 18 is filled and adapted by the pitch pad unit, and then connected by the first connecting bolt. One end of the azimuth unlocker 31 is fixedly connected with the U-shaped frame 10 by a screw through the connecting lug 3c, and the connecting flange 3a at the other end of the azimuth unlocker 31 is fixedly connected with the connecting plane 5b of the pyrotechnic base 5. The bottom flange 5a at the other end of the pyrotechnic base 5 has a certain width of the azimuth mounting gap 19 with the satellite cabin plate 4. The azimuth mounting gap 19 is filled and adapted by the azimuth pad unit, and then the pyrotechnic base 5 is rigidly connected with the satellite cabin plate 4 by the second connecting bolt.

[0060] As shown in Figure 8 and Figure 9 , the stress-free assembly process of the unlocker is as follows:

[0061] S1: The azimuth unlocker 31 is matched with the pyrotechnic base 5, and is fixedly connected as a whole by a screw to obtain an azimuth unlocker component, and there are four groups in total.

[0062] S2: After the two-dimensional turntable mechanism 2 and the camera body 1 are assembled, the two-dimensional turntable mechanism 2 is rotatably connected to the satellite cabin plate 4 through the azimuth axis system 9. Then, the azimuth unlocker components assembled in step S1 are installed with the U-shaped frame 10 and tightened with screws to complete the installation of the four sets of azimuth unlocker components.

[0063] S3: Then, in each concave spherical surface of the pyrotechnic base 5 in each set of azimuth unlocker components, install one azimuth ball head gasket 61 and two azimuth wedge gaskets 62 respectively, and then screw in the second connecting bolt. The second connecting bolt is not tightened, and the initial connection and installation between the three concave spherical surfaces of the pyrotechnic base 5 and the satellite compartment 4 is completed.

[0064] S4: Repeat step S3 to complete the initial connection and installation of the remaining three sets of azimuth unlocker components with satellite panel 4.

[0065] S5: Install the connecting lug 3c of the pitch unlocker 32 and mate it with the inside of the U-shaped frame 10 and secure it with screws. Insert the pitch ball joint gasket 71, the pitch ball socket gasket 72 and two pitch wedge gaskets 73 in sequence into the gap between the connecting flange 3a of the pitch unlocker 3 and the camera flange 1b of the camera body 1, and screw in the first connecting bolt. The first connecting bolt is not tightened. There are two locations (the right pitch unlocker 33 has two connecting flanges 3a, one above the other, corresponding to two first connecting bolts on the right side) to complete the initial connection and installation of the right pitch unlocker 32.

[0066] S6: Repeat step S5 to complete the initial connection and installation of the left pitch unlocker 32.

[0067] S7: As Figure 8 As shown, the positions where the satellite panel 4 is connected to the four azimuth unlockers 31 are marked as 1, 3, 2, and 4, respectively. Positions 1 and 2 are diagonal, and positions 3 and 4 are diagonal. The operator places a standard universal magnetic gauge base 16 near diagonal positions 1 and 2 on the satellite panel 4, mounts a dial indicator 17 on the base, and adjusts the base's orientation so that the needle of the dial indicator 17 contacts the first local plane 10c of the U-shaped frame 10. Similarly, the needle of the other dial indicator 17 contacts the second local plane 10d. The readings of the two dial indicators are then read and recorded as X1 and X2.

[0068] X1 and X2 are the initial values ​​of the positions of the first local plane 10c and the second local plane 10d of the U-shaped frame 10 when the second connecting bolt is not tightened.

[0069] S8: Adjust the three sets of matched azimuth wedge-shaped pads 62 at the diagonal positions 1 and 2 to fill the azimuth installation gap 19 between the extruded pyrotechnic base 5 and the satellite cabin plate 4, and at the same time observe the readings of the two micrometers 17 in step S7, to ensure that the values are within the range of X1±0.003 and X2±0.003 (i.e., to ensure that the positional fluctuation of the first and second partial planes 10c and 10d is within ±0.003).

[0070] S9: Repeat steps S7 and S8 to complete the filling and extrusion of the three sets of matched azimuth wedge-shaped pads 62 at the diagonal positions 3 and 4 (at this time, the hands of the two micrometers 17 are in contact with the first and second partial planes 10e and 10f of the U-shaped frame 10), to ensure that the values of the micrometers are within the range of X3±0.003 and X4±0.003. Finally, tighten the second connecting bolts in the order of positions 1, 2, 3, and 4 to complete the installation of the azimuth unlocker 31.

[0071] S10: Then remove the table seat and micrometer 17 used in steps S7, S8, and S9, and fix 2 sets of table seats and micrometers 17 on the bottom plane 10j of the U-shaped frame 10. Adjust the table seats so that the hands of the micrometers 17 are in contact with the two planes 1c on both sides of the camera body 1, and record the readings of the two micrometers at this time as Y1 and Y2.

[0072] S11: Adjust the matched pitch wedge-shaped pads 73 in the pitch unlocker 32 at the left and right positions (a total of four sets) to fill and extrude the pitch installation gap 18 between the camera flange 1b and the connecting flange 3a of the pitch unlocker 32, and at the same time observe the readings of the two micrometers 17 in step S10 to ensure that the values are within the range of Y1±0.003 and Y2±0.003. Finally, tighten the first connecting bolts to complete the fixation of the pitch unlocker 32 and the camera body 1.

[0073] According to the structure and method for eliminating the assembly stress of the follow-up sighting main machine unlocker of the application, the structure of the pitch pad unit and the azimuth pad unit, as well as the method of dynamically monitoring and adjusting the relative displacement caused by the installation of the unlocker by combining the micrometer reading are disclosed, which have been successfully used in the assembly of various types of unlockers. During the assembly process, on the one hand, the structure and method eliminate the influence of the installation stress of the pitch unlocker on the main mirror surface type of the camera body, thereby ensuring the stable performance of the camera. On the other hand, the structure and method avoid the damage to the bearings of the two-dimensional turntable mechanism caused by the assembly stress during the assembly process of the azimuth unlocker and the satellite cabin plate, thereby ensuring the stability of the shaft system (orthogonality) of the two-dimensional turntable mechanism during the assembly and launch of the follow-up sighting main machine, and improving the assembly efficiency and safety of the product.

[0074] The contents not described in detail in the specification of the present application are known to those skilled in the art.

[0075] The application has been described in detail with specific reference to particular embodiments and exemplifying examples, but it will be understood that these descriptions are not intended to limit the application to particular forms disclosed. Many modifications, equivalents and improvements created during the production of the application and its execution can be made by those skilled in the art without departing from the spirit and scope of the application. The scope of protection of the application is defined by the appended claims.

Claims

1. A structure for eliminating assembly stress in a tracking and aiming host unlocker, characterized in that: Includes pitch pad units and azimuth pad units; The U-shaped frame (10) is rotatably connected to the satellite module (4) via the azimuth axis (9). The U-shaped frame (10) is rotatably connected to the camera body (1) via the pitch drive axis (11) and the pitch brake axis (13). The U-shaped frame (10) and the satellite module (4) are fixed together by the azimuth unlocker (31). The azimuth shim unit is located in the gap between the azimuth unlocker (31) and the satellite module (4). The second connecting bolt passes through the azimuth unlocker (31) and the azimuth shim unit and is connected to the satellite module (4). The U-shaped frame (10) and the camera body (1) are fixed together by the pitch unlocker (32). The pitch shim unit is located in the gap between the pitch unlocker (32) and the camera body (1). The first connecting bolt passes through the pitch unlocker (32) and the pitch shim unit and is connected to the camera body (1). The pitch shim unit includes a pitch spherical assembly structure and a pitch thickness adjustment structure. The pitch spherical assembly structure includes a pitch ball head shim (71) and a pitch ball socket shim (72). The convex spherical surface of the pitch ball head shim (71) matches the concave spherical surface of the pitch ball socket shim (72). The opposite sides of the pitch ball head shim (71) and the pitch ball socket shim (72) are both planes. The pitch thickness adjustment structure includes two pitch wedge shims (73). The inclined surfaces of the two pitch wedge shims (73) match. The first connecting bolt passes through the pitch ball head shim (71), the pitch ball socket shim (72), and the two pitch wedge shims (73).

2. The structure for eliminating assembly stress of the tracking host unlocker according to claim 1, characterized in that: Both the pitch ball joint gasket (71) and the pitch ball socket gasket (72) are provided with pitch positioning holes for the first connecting bolt to pass through, and the diameter of the pitch positioning holes is larger than the outer diameter of the first connecting bolt.

3. The structure for eliminating assembly stress of the tracking host unlocker according to claim 1, characterized in that: Each pitch wedge gasket (73) has a first elongated groove along the direction of its own thickness change for the first connecting bolt to pass through, and the width of the first connecting bolt matches the width of the first elongated groove; when the pitch wedge gasket (73) is pushed, the distance between the planes of the two pitch wedge gaskets (73) changes.

4. The structure for eliminating assembly stress of the tracking host unlocker according to claim 1, characterized in that: The pitch spherical composite structure is located on the side of the pitch thickness adjustment structure away from the camera body (1).

5. The structure for eliminating assembly stress of the tracking host unlocker according to claim 1, characterized in that: The azimuth pad unit includes an azimuth spherical composite structure and an azimuth thickness adjustment structure; The azimuth spherical assembly structure includes a pyrotechnic base (5) and an azimuth ball head gasket (61). The two ends of the pyrotechnic base (5) are respectively provided with a bottom flange (5a) and a connecting plane (5b). The connecting plane (5b) is used to connect with the azimuth unlocker (31). The other end of the azimuth unlocker (31) is connected to the U-shaped frame (10). The second connecting bolt passes through the bottom flange (5a), the azimuth ball head gasket (61) and the azimuth thickness adjustment structure and is connected to the satellite compartment plate (4). The bottom flange (5a) is provided with multiple through holes for the second connecting bolt to pass through. The surface of the bottom flange (5a) facing the satellite compartment plate (4) at one end of the through hole is a concave spherical surface. The convex spherical surface of the azimuth ball head gasket (61) is matched with the concave spherical surface of the bottom flange (5a). The other side of the azimuth ball head gasket (61) is a plane. The orientation thickness adjustment structure includes two orientation wedge-shaped gaskets (62), and the inclined surfaces of the two orientation wedge-shaped gaskets (62) are engaged.

6. The structure for eliminating assembly stress of the tracking host unlocker according to claim 5, characterized in that: The orientation unlocker (31) includes an upper unit (312) and a lower unit (311) connected to each other. A pyrotechnic device is built into the space between the upper unit (312) and the lower unit (311) to separate the upper unit (312) and the lower unit (311) after firing. Connecting lugs (3c) are fixedly connected to both sides of the upper unit (312), and a connecting flange (3a) is connected to the outside of the lower unit (311). The connecting lug (3c) is fixedly connected to the U-shaped frame (10); A U-shaped recess is provided on one side of the pyrotechnic base (5). The U-shaped recess is located in the middle of the connecting plane (5b). The lower unit is locked in the U-shaped recess, and the connecting flange is located on the side of the connecting plane (5b) away from the bottom flange (5a). The connecting flange (3a) of the directional unlocker (31) is in contact with the connecting plane (5b) and fixed by screws.

7. The structure for eliminating assembly stress of the tracking host unlocker according to claim 1, characterized in that: Four directional unlockers (31) are provided, and the four directional unlockers (31) are located on both sides of the directional axis system (9) and are arranged in a rectangular pattern.

8. The structure for eliminating assembly stress of the tracking host unlocker according to claim 1, characterized in that: The two ends of the U-shaped frame (10) are located on both sides of the camera body (1). Two pitch unlockers (32) are provided, and the two pitch unlockers (32) are respectively connected to the two sides of the camera body (1) facing the two ends of the U-shaped frame (10).

9. An assembly method for a structure for eliminating assembly stress in a tracking host unlocker as described in any one of claims 1-8, characterized in that, include: S1: The orientation unlocker (31) is engaged and fixed with the pyrotechnic base (5) to obtain the orientation unlocker component; S2: After the U-shaped frame (10) is assembled with the camera body (1), the U-shaped frame (10) is rotatably connected to the satellite cabin plate (4) through the azimuth axis system (9), and the azimuth unlocker component of step S1 is installed with the U-shaped frame (10) and tightened with screws to complete the installation of the four sets of azimuth unlocker components; S3: Install one azimuth ball head gasket (61) and two azimuth wedge gaskets (62) at each concave spherical surface of each pyrotechnic base (5), screw in the second connecting bolt, do not tighten the second connecting bolt, and complete the initial connection and installation between the pyrotechnic base (5) and the satellite compartment (4); S4: Repeat step S3 to complete the initial connection and installation of the remaining three sets of azimuth unlocker components and satellite panel (4); S5: Fit and fix the pitch unlocker (32) to the inside of the U-shaped bracket (10), and install the pitch ball head gasket (71), pitch ball socket gasket (72) and two pitch wedge gaskets (73) in sequence at the gap between the pitch unlocker (32) and the camera body (1), and screw in the first connecting bolt. Do not tighten the first connecting bolt to complete the initial connection and installation of the pitch unlocker (32) on one side of the camera body (1); S6: Repeat step S5 to complete the initial connection and installation of the tilt unlocker (32) on the other side of the camera body (1); S7: The positions where the satellite panel (4) is connected to the four azimuth unlockers (31) are marked as 1, 3, 2 and 4 respectively, where 1 and 2 are a diagonal position and 3 and 4 are a diagonal position; standard universal magnetic base (16) is installed at diagonal positions 1 and 2 on the satellite panel (4), and a dial indicator (17) is installed on the base. The attitude of the standard universal magnetic base (16) is adjusted so that the needle of the dial indicator (17) contacts the first local plane (10c) of the U-shaped frame (10). Similarly, the needle of the other dial indicator (17) is made to contact the second local plane (10d). The readings of the two dial indicators are read and recorded respectively, and recorded as X1 and X2. S8: Adjust the three sets of paired azimuth wedge gaskets (62) of the pyrotechnic base (5) at diagonal positions 1 and 2 so that the azimuth wedge gaskets (62) fill and squeeze the azimuth installation gap (19) between the pyrotechnic base (5) and the satellite compartment plate (4), and at the same time observe the readings of the two dial gauges (17) in step S7 to ensure that the values ​​are within the range of X1±0.003 and X2±0.003; S9: Repeat steps S7 and S8 to fill and tighten the three sets of paired azimuth wedge gaskets (62) at diagonal positions 3 and 4, ensuring that the dial gauge values ​​are within the range of X3±0.003 and X4±0.003; finally, tighten the second connecting bolts in the order of positions 1, 2, 3, and 4 to complete the dial gauge installation of the azimuth unlocker (31); S10: Remove the standard universal magnetic base (16) and dial indicator (17) used in steps S7, S8 and S9. Fix two sets of bases and dial indicator (17) on the bottom plane (10j) of the U-shaped frame (10). Adjust the standard universal magnetic base (16) so that the needle of the dial indicator (17) contacts the two planes (1c) on both sides of the camera body (1). Read and record the readings of the left and right dial indicators at this time, and record them as Y1 and Y2. S11: Adjust the paired pitch wedge shims (73) in the left and right pitch unlockers (32) respectively, so that the paired pitch wedge shims (73) fill and squeeze the pitch installation gap (18) between the camera body (1) and the pitch unlocker (32), and at the same time observe the readings of the two dial gauges (17) in step S10, and ensure that the values ​​are within the range of Y1±0.003 and Y2±0.

003. Finally, tighten the first connecting bolt.

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