CN103471577A - Mechanical-shaking laser gyroscope light integrating mechanism - Google Patents

Abstract

The invention relates to a mechanical dithering laser gyro light combination mechanism. The light-combining mechanism is mainly composed of three parts: a light-combining prism adjustment device, a photoelectric cell adjustment device and a gyro shaking device. The light-combining prism adjustment device is mainly composed of three one-dimensional manual worktables, an electric rotary worktable and a light-combining prism holder in series, which are used to realize the clamping positioning, position and angle adjustment of the light-combining prism; The tube adjustment device is mainly composed of a three-dimensional precision electric worktable, a photocell holder and an inclined support in series, which are used for the clamping positioning and position adjustment of the photocell; the gyro shaking device is mainly composed of a bracket, a shaking wheel, a mounting frame, The cavity installation mechanism, positioning block, etc. are used to realize the positioning and shaking of the gyroscope. The mechanical dithering laser gyro light combining mechanism established by the combination of manual and electric methods in the invention has good operability and high positioning accuracy, and helps to improve the quality and efficiency of the laser gyro light combining process.

Description

Mechanical dithering laser gyro light combining mechanism

technical field

The invention relates to a mechanical dithering laser gyro light combination mechanism.

Background technique

Laser gyro has the advantages of fast response, wide dynamic measurement range, good linearity, small dynamic error, high precision, high reliability, etc., and is widely used in strapdown inertial navigation systems. Combining light of laser gyro refers to the precise adjustment of the position of light combining prism and photoelectric tube during the manufacturing process of laser gyro, so that the laser beam running in the resonant cavity will interfere when outputting, and the frequency difference information corresponding to the angular velocity of gyro can be accurately obtained. At present, the combined light assembly process of domestic laser gyroscopes mainly adopts manual operation. Due to the influence of many factors such as the experience and skills of operators, the quality and efficiency of light combined assembly can no longer meet the needs of laser gyroscope production.

Contents of the invention

The purpose of the present invention is to design a mechanically dithering laser gyro light combining mechanism to solve the problems existing in the existing manually operated mechanically dithering laser gyro light combining mechanism, which replaces most of the manual work, and has high positioning accuracy and operability. It has good performance and helps to improve the quality and efficiency of the laser gyro light synthesis process.

To achieve the above object, the thinking of the present invention is as follows:

Considering the convenience of the mechanical structure to complete the light combination assembly, the resonant cavity should be placed vertically, that is, the plane mirror with the optical prism installed is parallel to the horizontal plane. In order to prevent the mechanism from installing the optical prism and photoelectric tube on the resonant cavity to produce interference, the optical prism adjustment device, the gyro shaking device and the photoelectric tube adjustment device should be arranged on the left, middle and right of the optical platform. In order to complete the light combination task, the light combination prism needs to move in the X and Y directions and rotate around the Z axis in the plane where the plane mirror is located. , and the translation motion precision is low, and the rotation precision is high. Therefore, the light combining prism adjustment device is composed of three manual translation tables and an electric rotary table in series to realize the movement of the light combining prism. Since the photocell is installed on the upper surface of the light combining prism to receive the output light of the resonant cavity, and the upper surface of the light combining prism forms a certain inclination angle with the horizontal plane, the support of the photoelectric tube adjustment device is designed to be in line with the upper surface of the light combining prism. The surface has the same inclination angle, and three orthogonal translation worktables are installed on it to realize the position adjustment of the photocell. Because the movement precision of the photocell is high, the electric workbench is selected to complete the movement of the photocell.

Based on above thinking, the present invention adopts following technical scheme:

A mechanical dithering laser gyro light combination mechanism, including an optical platform, a light combination prism adjustment device, a photocell adjustment device, a gyro shaking device, and a resonant cavity with a plane mirror to be assembled, a light combination prism and The photoelectric tube, the light-combining prism adjusting device is used to complete the clamping positioning, position and angle adjustment of the light-combining prism, and is fixed on the left side of the optical table; the photoelectric tube adjusting device is used to complete the clamping and positioning of the photoelectric tube and The position adjustment is fixed on the right side of the optical table; the gyro shaking device is used to complete the positioning and shaking of the resonant cavity and is fixed in the middle of the optical table.

The light-combining prism adjustment device of the above-mentioned mechanical shaking laser gyro light-combining mechanism consists of a base plate, an X-direction manual workbench, a Y-direction manual workbench, an L-shaped adapter plate, a Z-direction manual workbench, and an electric rotating It consists of a workbench and a light-combining prism holder; the base plate is fixed on the left side of the optical table, the Y-direction manual workbench is orthogonally connected to the X-direction manual workbench and fixed on the base plate, and the Z-direction manual workbench passes through the L The adapter plate is fixed on the Y-direction manual workbench, and the light-combining prism holder is connected with the electric rotary workbench and fixed on the Z-direction manual workbench. The position adjustment of the light combining prism is completed by the three-dimensional manual worktable, the angle adjustment is completed by the one-dimensional electric rotary worktable, and the clamping and positioning of the light combining prism are realized by the light combining prism holder. The light-combining prism holder consists of a fixed seat, an L-shaped bracket, a knurled knob, two bearing end caps, two knurled screws, two webs, a left-handed nut, two round nuts, two Guide sleeve, one guide rod, two sleeves, one right-handed nut, one left and right screw rod, one right side plate, one compression screw, one guide block, one push rod, one right jaw, one left jaw , a left panel. The L-shaped bracket is fixed on the electric rotary workbench, the fixing seat is connected with the upper surface of the L-shaped bracket through screws, the left-handed nut and a sleeve are inserted into the mounting hole of the guide sleeve on the left side and connected with the left and right screw rods. The left-handed thread is screwed together, and the right-handed nut and another sleeve are inserted into the installation hole of the other guide sleeve and then screwed with the right-handed thread on the left and right screw rods. By adjusting the left-handed nut, right-handed nut and the two guide sleeves The positions of the mounting holes make the left-handed nuts and right-handed nuts symmetrically distributed on the left and right screw rods. Two bearings are respectively installed in the inner holes of the two webs to support the left and right screw rods. The bearing end cover is connected with the web. By adjusting the thickness of the gasket installed between the shaft shoulders of the left and right screw rods and the bearings Eliminate the axial play of the whole mechanism. The guide rod passes through the two sleeves, and the two sleeves and the two guide sleeves are fixed with two round nuts on the left and right sides. At the same time, the guide rod is inserted into the symmetrical circular groove of the web on the left and right The center point of the groove is located on the axis of the left and right screw rods), and the left and right ends are respectively equipped with knurled screws, which are used to drive the guide rod to slide in the arc-shaped groove of the web, and then realize the end of the light-combining prism holder. Rotate around the axis of the left and right helical screw rods (the maximum can be rotated by 30 degrees) to facilitate the wiping of the flat mirror. The left side plate and the right side plate are respectively fixed on the sides of the guide sleeves on the left and right sides by screws, and the left jaw and the right jaw are respectively connected with the left side plate and the right side plate, which are used to realize that the combined light prism Positioning in three directions: side, right and rear. The guide block is fixed on the right side plate, and the positioning of the light-combining prism in front is realized through the push rod and the compression screw installed on it. The knurled knob is fixed on the left end of the left and right screw rods by set screws, and is used to drive the left and right screw rods to rotate (that is, the left and right screw mechanisms) to realize the clamping and releasing of the light-combining prism.

The photocell adjustment device of the above-mentioned mechanical shaking laser gyro light combination mechanism consists of a photocell holder, a Z-direction electric workbench, an L-shaped connecting plate, an inclined support, an X-direction electric workbench and a Y-direction electric workbench. Composed of an electric worktable; the inclined support is fixed to the optical platform, and its inclination angle is the same as that of the light-combining prism. Connection, the Z-direction electric workbench is fixed on the L-shaped connecting plate and connected with the X-direction electric workbench, and the photocell holder is fixed in series at the end of the Z-direction electric workbench. The position adjustment of the photocell is completed by the three-dimensional electric workbench, and its clamping and positioning are realized by the photocell holder. The photocell holder is composed of a positioning plate, a right claw, a left claw, a left arm, two rotating shafts, a right arm, a cam, a knurled knob, a spring and an L-shaped plate; The above-mentioned L-shaped plate is fixed on the Z-direction electric workbench by screws, the left arm and the right arm are respectively connected to the L-shaped plate through the rotating shaft, and the left claw and the right claw are respectively connected to the left arm and the right arm, with slotted positioning The plate is fixed on the right claw to realize the positioning of the photocell, the cam is connected with the L-shaped plate through a rotating shaft, and the knurled knob is fixed with the cam through a set screw. When the knurled knob rotates, it drives the cam to rotate together, and then pushes the left arm and the right arm with the left claw and the right claw to rotate around the two rotating shafts respectively (that is, to form a symmetrical lever mechanism), thereby realizing the clamping and releasing of the photocell. The spring is connected to the ends of the left arm and the right arm by screws to ensure that the cam is always in contact with the left arm and the right arm.

The gyro shaking device of the above-mentioned mechanical shaking laser gyro light combination mechanism consists of a bracket, two shaking wheel mounting brackets, a shaking wheel, a cavity mounting mechanism, two positioning blocks and a large round nut; the bracket is fixed on the optical platform. In the middle position, the shaking wheel and the two shaking wheel mounting frames are connected by screws, one end is fixed with the bracket, and the other end is connected with the cavity installation mechanism, and the two positioning blocks are respectively fixed at the left and right lower corners of the cavity installation mechanism to form a V-shaped structure , together with the cylindrical surface on the cavity installation mechanism, the precise positioning of the resonant cavity can be realized to ensure that the upper surface of the plane reflector is parallel to the horizontal plane, and the large round nut is connected with the thread on the cavity installation mechanism to realize the resonant cavity. Press tight. Piezoelectric ceramics are pasted on the shaking wheel to realize the shaking of the resonant cavity.

Compared with the prior art, the present invention has simple structure, good operability and high positioning accuracy, and can effectively improve the quality and efficiency of the laser gyro light combining process.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the mechanism of the present invention.

Fig. 2 is a schematic diagram of an optical component to be assembled according to the present invention.

Fig. 3 is a schematic diagram of the structure of the light combining prism adjusting device in the present invention.

Fig. 4 is a schematic structural view of the light combining prism holder in the present invention.

Fig. 5 is a schematic diagram of the structure of the photoelectric cell adjustment device in the present invention.

Fig. 6 is a schematic diagram of the structure of the photocell holder in the present invention.

Fig. 7 is a schematic diagram of the structure of the gyro shaking device.

Detailed ways

The preferred embodiments of the present invention are described as follows in conjunction with the accompanying drawings:

Embodiment one:

Referring to Figures 1 and 2, the mechanically dithering laser gyro light combining mechanism of this invention includes an optical platform 1, a light combining prism adjustment device 2, a photocell adjustment device 3, a gyro shaking device 4 and a The resonant cavity 5 of the plane reflector 6, the light-combining prism 7 and the photoelectric cell 8 are characterized in that: the light-combining prism adjusting device 2 is used to complete the clamping positioning, position and angle adjustment of the light-combining prism 7, It is fixed on the left side of the optical table 1; the photoelectric cell adjustment device 3 is used to complete the clamping positioning and position adjustment of the photoelectric cell 8, and is fixed on the right side of the optical table 1; the gyro shaking device 4 is used to complete the adjustment of the resonant cavity 5 Positioning and shaking, fixed in the middle of the optical table 1.

Embodiment two:

This embodiment is basically the same as Embodiment 1, and its special features are:

1, 3, 4, the light-combining prism adjustment device 2 is composed of a base plate 9, an X-direction manual workbench 10, a Y-direction manual workbench 11, an L-shaped adapter plate 12, and a Z-direction manual workbench. Workbench 13, an electric rotary workbench 14 and a light-combining prism holder 15; Connected and fixed on the bottom plate 9, the Z-direction manual workbench 13 is fixed on the Y-direction manual workbench 11 through the L-shaped adapter plate 12, and the light-combining prism holder 15 is connected and fixed to the Z-direction manual workbench 14 with the electric rotary workbench 14 On stage 13. The position adjustment of the light-combining prism 7 is completed by the three-dimensional manual worktables 10, 11, 13, the angle adjustment is completed by the one-dimensional electric rotary workbench 14, and the clamping and positioning of the light-combining prism 7 are realized by the light-combining prism holder 15. Described light-combining prism holder 15 consists of a fixed base 16, an L-shaped bracket 17, a knurled knob 18, two bearing end caps 19, two knurled screws 20, two webs 21, a left-handed Nut 22, two round nuts 23, two guide sleeves 24, a guide rod 25, two sleeves 26, a right-handed nut 27, a left and right screw rod 28, a right side plate 29, a compression screw 30 , a guide block 31, a push rod 32, a right jaw 33, a left jaw 34, and a left side plate 35. The L-shaped bracket 17 is fixed on the electric rotary table 14, the fixing seat 16 is connected with the upper surface of the L-shaped bracket 17 by screws, and the left-handed nut 22 and a sleeve 26 are correspondingly inserted into the mounting hole of the guide sleeve 24 on the left side. Screwed with the left-handed thread on the left and right screw rods 28, the right-handed nut 27 and another sleeve 26 are correspondingly inserted into the mounting hole of another guide sleeve 24 and screwed with the right-handed threads on the left and right screw rods 28, by adjusting The positions of the mounting holes on the left-handed nut 22 , the right-handed nut 27 and the two guide sleeves 24 make the symmetrical distribution of the left-handed nut 22 and the right-handed nut 27 on the left and right screw rods 28 . Two bearings are respectively installed in the inner holes of the two webs 21 to support the left and right screw rods 28, the bearing end cover 19 is connected with the web 21, and is installed between the shoulders of the left and right screw rods 28 and the bearings by adjusting The spacer thickness between eliminates the axial play of the whole mechanism. The guide rod 25 passes through the two sleeves 26, and the two sleeves 26 and the two guide sleeves 24 are fixed by two round nuts 23 on the left and right sides. At the same time, the guide rod 25 is inserted into the symmetrical arc of the web 21 on the left and right sides In the arc-shaped groove (the center point of the arc-shaped groove is located on the axis line of the left and right screw rods 28), knurled screws 20 are respectively installed at the left and right ends, which are used to drive the guide rod 25 in the arc-shaped groove of the web 21 Sliding, and then realize the rotation of the end of the light-combining prism holder 15 around the axis of the left and right helical screw rods (the maximum can be rotated by 30 degrees), so as to realize the wiping of the plane reflector 6. Left side plate 35, right side plate 29 are respectively fixed on the side of the guide sleeve 24 of left and right sides by screw, left jaw 34, right jaw 33 are connected with left side plate 35, right side plate 29 respectively, use To realize the positioning of the light-combining prism 7 in the three directions of left, right and rear. The guide block 31 is fixed on the right side plate 29, and the positioning of the light-combining prism 7 in the front is realized by the push rod 32 and the compression screw 30 installed thereon. The knurled knob 18 is fixed on the left end of the left and right helical screw rods 28 by set screws, and is used to drive the left and right helical screw rods 28 to rotate (ie, the left and right screw mechanisms) to realize the clamping and releasing of the light-combining prism 7 .

Embodiment three:

This embodiment is basically the same as Embodiment 1, and its special features are:

1, 5, 6, the photocell adjustment device 3 is composed of a photocell holder 36, a Z-direction motorized workbench 37, an L-shaped connecting plate 38, an inclined support 39, and an X-direction motorized Workbench 40 and a Y-direction electric workbench 41 are composed; the inclined support 39 is fixedly connected with the optical table 1, and its inclination angle is the same as that of the light-combining prism 7, and the X-direction electric workbench 40 is connected with the Y-direction electric After the workbench 41 is orthogonally connected, it is connected with the inclined support 39 by screws, the Z-direction electric workbench 37 is fixed on the L-shaped connecting plate 38 and connected with the X-direction electric workbench 40, and the photocell holder 36 is fixed in series on the Z-direction Electric workbench 37 ends. The position adjustment of the photoelectric tube 8 is completed by the three-dimensional electric workbench 37, 40, 41, and its clamping and positioning are realized by the photoelectric tube holder 36. Described photocell holder 36 is made of a positioning plate 42, a right claw 43, a left claw 44, a left arm 45, two rotating shafts 46, a right arm 47, a cam 48, a knurled knob 49, It consists of a spring 50 and an L-shaped plate 51; the L-shaped plate 51 is fixed on the Z-direction electric workbench 37 by screws, and the left arm 45 and the right arm 47 are respectively connected with the L-shaped plate 51 through the rotating shaft 46. Claw 44, right claw 43 are connected with left arm 45, right arm 47 respectively, and the positioning plate 42 that has slotting is fixed on the right claw 43, is used for realizing the location of photocell 8, and cam 48 is connected with L by a rotating shaft. Shaped plate 51 is connected, and knurled knob 49 is fixed with cam 48 by set screw. When the knurled knob 49 rotates, it drives the cam 48 to rotate together, and then pushes the left arm 45 and the right arm 47 to rotate around the two rotating shafts 46 with the left claw 44 and the right claw 43 respectively (that is, to form a symmetrical lever mechanism), thereby realizing photoelectricity. Clamping and release of tube 8. The spring 50 is connected to the ends of the left arm 45 and the right arm 47 by screws to ensure that the cam 48 is in contact with the left arm 45 and the right arm 47 all the time.

Embodiment four:

This embodiment is basically the same as Embodiment 1, and its special features are:

1 and 7, the gyro shaking device 4 is composed of a bracket 52, two shaking wheel mounting brackets 53, a shaking wheel 54, a cavity mounting mechanism 55, two positioning blocks 56 and a large round nut 57; The bracket 52 is fixed at the middle position of the optical table 1, the shaking wheel 54 is connected with the two shaking wheel mounting brackets 53 by screws, one end is fixed with the bracket 52, the other end is connected with the cavity mounting mechanism 55, and the two positioning blocks 56 are respectively fixed on The left and right lower corners of the cavity installation mechanism 55 form a V-shaped structure, and together with the cylindrical surface on the cavity installation mechanism 55, the precise positioning of the resonant cavity 5 is realized to ensure that the upper surface of the plane reflector 6 is parallel to the horizontal plane, and the large round nut 57 is connected with the thread on the cavity installation mechanism 55, and is used to realize the compression of the resonant cavity 5. Piezoelectric ceramics are pasted on the shaking wheel 54 to realize the shaking of the resonant cavity 5 . the

Claims (6)

1. optical mechanism is closed in a mechanical shaking laser gyro, comprise an optical table (1), a light-combining prism adjusting gear (2), a regulation device for photoelectric tube (3), a gyro jittering device (4) and the resonant cavity with plane mirror (6) (5), light-combining prism (7) and photoelectric tube (8) to be assembled, it is characterized in that: described light-combining prism adjusting gear (2), for the adjustment of the clamping position, position and the angle that complete light-combining prism (7), is fixed on the left side of optical table (1); Regulation device for photoelectric tube (3), for the clamping position that completes photoelectric tube (8) and the adjustment of position, is fixed on the right side of optical table (1); Gyro jittering device (4), for completing location and the shake of resonant cavity (5), is fixed on the centre position of optical table (1).

2. optical mechanism is closed in mechanical shaking laser gyro according to claim 1, it is characterized in that: described light-combining prism adjusting gear (2) is comprised of a base plate (9), an X-direction manual work platform (10), a Y-direction manual work platform (11), a L shaped card extender (12), a Z-direction manual work platform (13), an electronic rotation worktable (14) and a light-combining prism clamper (15); Described base plate (9) is fixed on the left side of optical table (1), Y is fastened on base plate (9) to manual work platform (11) and X-direction manual work platform (10) quadrature, it is upper that Z-direction manual work platform (13) is fixed on Y-direction manual work platform (11) by L shaped card extender (12), and light-combining prism clamper (15) is connected and fixed on Z-direction manual work platform (13) with electronic rotation worktable (14); The adjustment of the position of light-combining prism (7) is completed by X-direction manual work platform (10), Y-direction manual work platform (11), Z-direction manual work platform (13), angular setting is completed by one dimension electronic rotation worktable (14), and the clamping of light-combining prism (7), location are realized by light-combining prism clamper (15).

3. optical mechanism is closed in mechanical shaking laser gyro according to claim 1 and 2, it is characterized in that: the described light-combining prism clamper (15) in described light-combining prism adjusting gear (2) is by a holder (16), a L bracket (17), a knurled knob (18), two bearing (ball) covers (19), two milled screws (20), two webs (21), a left-hand threaded nut (22), two round nuts (23), two orienting sleeves (24), a guide pole (25), two sleeves (26), a right-handed nut (27), a left-and-right spiral screw mandrel (28), a right plate (29), a housing screw (30), an orienting lug (31), a push rod (32), a right jaw (33), a left jaw (34), a left plate (35) forms, described L bracket (17) is fixed on electronic rotation worktable (14), holder (16) is connected with L bracket (17) upper surface by screw, left-hand threaded nut (22) and a sleeve (26) be corresponding insert after the mounting hole of orienting sleeve (24) in left side with left-and-right spiral screw mandrel (28) on left-hand thread (LHT) screw, right-handed nut (27) and another sleeve (26) be corresponding insert after the mounting hole of another orienting sleeve (24) with left-and-right spiral screw mandrel (28) on right-hand thread screw, by adjusting left-hand threaded nut (22), the position of the upper mounting hole of right-handed nut (27) and two orienting sleeves (24), make left-hand threaded nut (22) and right-handed nut (27) upper symmetrical at left-and-right spiral screw mandrel (28), two bearings are installed respectively in the endoporus of two webs (21), for carries left right-hand screw screw mandrel (28), bearing (ball) cover (19) is connected with web (21), by adjusting, is arranged on the shaft shoulder of left-and-right spiral screw mandrel (28) and the end play that the spacer thickness between bearing is eliminated whole mechanism, guide pole (25) is through two sleeves (26), the left and right sides is fixing by two sleeves (26) and two orienting sleeves (24) with two round nuts (23), simultaneously, guide pole (25) inserts in the symmetric, arc groove of left and right sides web (21), the arc-shaped slot central point is positioned on the axial line of left-and-right spiral screw mandrel (28), milled screw (20) is installed respectively at the two ends, left and right of guide pole (25), for driving guide pole (25), in the arc-shaped slot of web (21), slide, and then realize that light-combining prism clamper (15) end rotates around the axial line of left-and-right spiral screw mandrel, so that realize the wiping of plane mirror (6), left plate (35), right plate (29) are separately fixed at by screw on the side of orienting sleeve (24) of arranged on left and right sides, left jaw (34), right jaw (33) are connected with left plate (35), right plate (29) respectively, for realize light-combining prism (7) in left side, the location of three directions in right side and rear, it is upper that orienting lug (31) is fixed on right plate (29), by push rod (32) and the housing screw (30) installed on it, realizes light-combining prism (7) location forwardly, knurled knob (18) is fixed on the left end of left-and-right spiral screw mandrel (28) by holding screw, for driving left-and-right spiral screw mandrel (28) rotation, i.e. and left-and-right spiral mechanism, and then realize clamping and releasing of light-combining prism (7).

4. optical mechanism is closed in mechanical shaking laser gyro according to claim 1, it is characterized in that: described regulation device for photoelectric tube (3) is comprised of a photoelectric tube clamper (36), a Z-direction electric table (37), a L shaped web joint (38), an inclination bearing (39), an X-direction electric table (40) and a Y-direction electric table (41); Described inclination bearing (39) is affixed with optical table (1), its angle of inclination is identical with the angle of inclination of light-combining prism (7), X-direction electric table (40) with by screw, with inclination bearing (39), be connected after Y-direction electric table (41) quadrature is connected, Z-direction electric table (37) is fixed on L shaped web joint (38) and above is connected with X-direction electric table (40), and photoelectric tube clamper (36) series connection is fixed on Z-direction electric table (37) end; The position of photoelectric tube (8) is adjusted Z-direction electric table (37), X-direction electric table (40) and Y-direction electric table (41) and is completed, and its clamping, location are realized by photoelectric tube clamper (36).

5. according to claim 1 or 4, optical mechanism is closed in described mechanical shaking laser gyro, it is characterized in that: the described photoelectric tube clamper (36) in described regulation device for photoelectric tube (3) is comprised of a location-plate (42), a right pawl (43), a left pawl (44), a left arm (45), two rotating shafts (46), a right arm (47), a cam (48), a knurled knob (49), a spring (50) and a L shaped plate (51); Described L shaped plate (51) is fixed by screws on Z-direction electric table (37), left arm (45), right arm (47) are connected with L shaped plate (51) by rotating shaft (46) respectively, left pawl (44), right pawl (43) are connected with left arm (45), right arm (47) respectively, be with slotted location-plate (42) to be fixed on right pawl (43), for realizing the location of photoelectric tube (8), cam (48) is connected with L shaped plate (51) by a turning axle, and knurled knob (49) is fixing by holding screw and cam (48); During knurled knob (49) rotation, band moving cam (48) rotates together, and then promote left arm (45), right arm (47) rotates around two rotating shafts (46) respectively with left pawl (44), right pawl (43), form the symmetrical expression leverage, thereby realize clamping and releasing of photoelectric tube (8); Spring (50) is connected by screw the end with right arm (47) at left arm (45), for guaranteeing cam (48), with left arm (45), right arm (47), contacts all the time.

6. optical mechanism is closed in mechanical shaking laser gyro according to claim 1, it is characterized in that: described gyro jittering device (4) is comprised of a support (52), two dithering-wheel erecting frames (53), a dithering-wheel (54), a cavity installing mechanism (55), two locating pieces (56) and a large round nut (57), support (52) is fixed on the centre position of optical table (1), dithering-wheel (54) is connected by screw with two dithering-wheel erecting frames (53), one end and support (52) are fixing, the other end is connected with cavity installing mechanism (55), two locating pieces (56) are separately fixed at the left side of cavity installing mechanism (55), the lower right corner forms v-shaped structure, with the accurate location of together with the face of cylinder on cavity installing mechanism (55), realizing resonant cavity (5), parallel with surface level with the upper surface that guarantees plane mirror (6), large round nut (57) and being threaded on cavity installing mechanism (55), for realizing the compression of resonant cavity (5), the upper piezoelectric ceramics of pasting of dithering-wheel (54), in order to realize the shake of resonant cavity (5).

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