High reliability pointing mechanism with failure emergency exit capability

Abstract

The present application relates to a kind of high-reliability calibration mechanism with emergency exit capability of failure, and the problem of how to carry out emergency exit of failure when calibration mechanism is in light-shield state is solved, the present application includes the base being arranged on calibration fixed frame, fixed seat is arranged on the base, the rotating shaft of calibration assembly is rotatably connected with fixed seat, and the rotating shaft both ends are connected with motor and potentiometer respectively;The outer wall of the side of rotating shaft is connected with calibration plate, the side of calibration fixed frame is provided with the turnover shaft parallel with the axis of rotating shaft, and it is hinged with the base near the side of turnover shaft;Turnover shaft is provided with torsional spring, and its both ends are connected with base and calibration fixed frame respectively;Locking release assembly is arranged on the bottom of calibration fixed frame, the notch bolt in it is responsible for connecting base and calibration fixed frame, notch bolt, shape memory alloy tube and heater are sequentially sleeved in shell from inside to outside, and the notch of notch bolt is located at the joint surface of base and calibration fixed frame.

Description

TECHNICAL FIELD

[0001] The present application relates to a scaling mechanism, in particular to a high-reliability scaling mechanism with fault emergency exit capability. BACKGROUND

[0002] Space optical remote sensing cameras are scientific instruments for space-to-ground observation on space platforms, which have obvious advantages such as large field of view, wide coverage, fast moving speed and no restriction by air space. With the expansion of the demand for aerial observation equipment, space optical remote sensing cameras have rapidly developed in the field of aerial photography imaging.

[0003] The scaling mechanism is a key component for monitoring the photoelectric performance changes of the camera during space operation. It adjusts the light input of the space optical remote sensing camera through the swing angle of the scaling plate, so its performance directly determines the imaging quality of the camera. With the continuous development of space-to-ground observation technology, on the one hand, it is increasingly urgent to make further breakthroughs in observation accuracy, sky coverage, operating life and other technical and task indicators of aerial observation equipment, but the traditional scaling mechanism has problems such as poor reliability, complex assembly process and low production efficiency, which cannot fully meet the growing radiation scaling needs of space optical remote sensing cameras. On the other hand, the scaling mechanism needs to withstand the rocket launch vibration during the rocket launch process, and when it reaches the outer space environment, it also needs to adapt to the working environment of the sharp change of space temperature. When it works, the motor needs to drive the scaling plate to swing back and forth. If the motor is damaged to varying degrees in the harsh working environment, the scaling mechanism has a high risk of being stuck, causing light obstruction, which is a major factor affecting the imaging quality of the camera. Therefore, it is required that the scaling mechanism has a fault emergency exit function to reduce the impact on the focal plane of the space optical remote sensing camera when the light shielding state fails. SUMMARY

[0004] The purpose of the present application is to solve the technical problem that the scaling mechanism fails when it is in the light shielding state and is difficult to perform fault emergency exit, and to provide a high-reliability scaling mechanism with fault emergency exit capability.

[0005] In order to achieve the above-mentioned application purpose, the present application provides the following technical solutions:

[0006] A high-reliability scaling mechanism with fault emergency exit capability, characterized in that it comprises a scaling fixed frame, a base, an execution assembly, a driving assembly, a feedback assembly, a locking and releasing assembly and a main controller.

[0007] The scaling fixed frame is fixedly installed at the light inlet of the space optical remote sensing camera, and the base is arranged on the scaling fixed frame.

[0008] The execution assembly includes a calibration assembly and a motor; two fixing seats are oppositely arranged at two ends of the base, the motor is connected to the base, the calibration assembly includes a rotating shaft and a calibration plate, the rotating shaft is rotationally connected to the two fixing seats respectively, and one end of the rotating shaft is connected to an output end of the motor; the calibration plate is located between the two fixing seats and is connected to an outer wall of one side of the rotating shaft; a control end of the motor is connected to the main controller, and is used for controlling a rotation angle of the calibration plate to adjust an amount of light entering;

[0009] The driving assembly is used for overturning the base in case of failure, and includes a turnover shaft and a torsional spring; the turnover shaft is fixed to one side of the calibration fixing frame, an axis line of the turnover shaft is parallel to the rotating shaft, and the turnover shaft is hingedly connected to a side of the base close to the turnover shaft; the torsional spring is sleeved on the turnover shaft, and two ends of the torsional spring are connected to the base and the calibration fixing frame respectively;

[0010] The feedback assembly includes a potentiometer arranged on the base, and the other end of the rotating shaft is connected to an input end of the potentiometer; an output end of the potentiometer is connected to the main controller, and is used for monitoring the rotation angle of the calibration plate;

[0011] The locking and releasing assembly includes a shell, a heater arranged in the shell, a notched bolt, and a shape memory alloy tube; the shell is connected to a bottom of the calibration fixing frame, the notched bolt, the shape memory alloy tube, and the heater are sequentially sleeved in the shell from inside to outside, the notched bolt is used for connecting the calibration fixing frame and the base, and a notch is arranged on the notched bolt and located at a joint surface of the calibration fixing frame and the base; a control end of the heater is connected to the main controller, and is used for starting the heater to heat the shape memory alloy tube in case of failure, so that the notched bolt is disconnected at the notch under the action of a phase change force.

[0012] Further, a docking locking assembly is further included; the docking locking assembly includes a docking cone rod arranged at a top of one of the fixing seats and a docking cone rod groove arranged on a side wall of the calibration fixing frame on the same side of the turnover shaft, and positions of the docking cone rod groove and the docking cone rod satisfy that the docking cone rod is inserted into the docking cone rod groove when the base is rotated around the turnover shaft to a horizontal state of a bottom surface of the base.

[0013] Further, a motor mounting frame and a potentiometer mounting frame are arranged on the base; the motor mounting frame and the potentiometer mounting frame are respectively located on the outside of the two fixing seats;

[0014] The motor is connected to the motor mounting frame, and an output end of the motor is fixedly connected to one end of the rotating shaft through a first coupling;

[0015] The potentiometer is connected to the potentiometer mounting frame, and an input end of the potentiometer is fixedly connected to the other end of the rotating shaft through a second coupling.

[0016] Further, the feedback assembly further comprises a proximity switch and a magnetic steel mounting arm for cooperating with the proximity switch.

[0017] The magnetic steel mounting arm is fixed on the outer wall of the rotating shaft between the second coupling and the fixed seat; the proximity switch is arranged on the side of the potentiometer mounting frame close to the fixed seat, and two proximity switches are arranged on the two sides of the second coupling respectively; the positions of the magnetic steel mounting arm and the proximity switches are arranged to meet that when the calibration plate is rotated to the side away from the turnover shaft and is in a horizontal state, or the calibration plate is rotated to the side close to the turnover shaft and is in a horizontal state, the magnetic steel mounting arm is respectively inducted by the two proximity switches, and the output ends of the two proximity switches are respectively connected to the main controller.

[0018] Further, the calibration assembly further comprises a counterweight; a section of the rotating shaft connected with the calibration plate is rectangular, and the counterweight is connected to the outer wall of the rotating shaft on the side opposite to the calibration plate through a screw.

[0019] Further, a stop block is arranged on the two sides of one of the fixed seats, and a stop plate is arranged on the end of the calibration plate close to the stop block, and the positions of the stop block and the stop plate are arranged to meet that when the calibration plate is rotated to the side away from the turnover shaft and is in a horizontal state, and the calibration plate is rotated to the side close to the turnover shaft and is in a horizontal state, the stop plate abuts against the two stop blocks respectively.

[0020] Further, the torsional spring comprises a first torsional spring and a second torsional spring, and the two torsional springs are arranged at the two ends of the turnover shaft respectively.

[0021] Further, an angular contact ball bearing is arranged in one of the fixed seats, and a deep groove ball bearing is arranged in the other fixed seat, and the two ends of the rotating shaft are connected to the two fixed seats through the angular contact ball bearing and the deep groove ball bearing respectively.

[0022] Further, the rotating shaft, the butt joint conical rod and the butt joint conical rod groove are made of titanium alloy; the calibration fixed frame, the calibration plate, the motor mounting frame and the potentiometer mounting frame are made of aluminum alloy; and the counterweight is made of brass.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] (1) The high-reliability calibration mechanism with emergency exit capability in case of failure provided by the application comprises a calibration fixing frame, a base, an execution assembly, a driving assembly, a feedback assembly, a locking and releasing assembly, and a main controller. The base is arranged on the calibration fixing frame, and two fixed seats are arranged at opposite ends of the base. The execution assembly is responsible for shielding light and comprises a rotating shaft rotatably connected with the two fixed seats. A calibration plate is connected with the outer wall of one side of the rotating shaft. A motor is connected with one end of the rotating shaft. The control end of the motor is connected with the main controller, which is used to control the rotation angle of the calibration plate to adjust the amount of light. The feedback assembly is responsible for real-time monitoring of the position state of the calibration plate, and comprises a potentiometer connected with the other end of the rotating shaft. The driving assembly and the locking and releasing assembly cooperate to realize emergency exit in case of failure in the light shielding state. The driving assembly comprises a turnover shaft fixed on one side of the calibration fixing frame and parallel to the axis of the rotating shaft. A torsional spring is sleeved on the turnover shaft, and the two ends of the torsional spring are connected with the base and the calibration fixing frame, respectively. The locking and releasing assembly is responsible for connecting the base and the calibration fixing frame in the absence of failure. When failure occurs, the main controller detects that the motor is stuck, and then starts the heater to heat the shape memory alloy tube to about 80 DEG C. The shape memory alloy tube deforms, and under the action of the phase transition force of the shape memory alloy tube, the gap bolt will be broken at the gap, so that the base and the calibration fixing frame lose connection. At this time, under the action of the torsional spring, the whole base will rotate around the turnover shaft, so that the calibration plate no longer shields the light of the space optical remote sensing camera.

[0025] (2) The high-reliability calibration mechanism with emergency exit capability in case of failure provided by the application further comprises a docking locking assembly, which comprises a docking cone rod and a docking cone rod groove. After emergency exit due to failure, the base will rotate around the turnover shaft. When the base rotates around the turnover shaft to the horizontal state of the bottom surface of the base, the docking cone rod is inserted into the docking cone rod groove to lock the position of the base.

[0026] (3) The high-reliability calibration mechanism with emergency exit capability in case of failure provided by the application further comprises a proximity switch and a magnetic steel mounting arm cooperating with the proximity switch. The positions of the magnetic steel mounting arm and the proximity switch are arranged to meet that when the calibration plate rotates to the side away from the turnover shaft and is in a horizontal state, or the calibration plate rotates to the side close to the turnover shaft and is in a horizontal state, the magnetic steel mounting arm is respectively inducted by two proximity switches. These two states are the light transmission and light shielding states. The switch signal of the proximity switch is used to determine whether the calibration plate is in the light transmission or light shielding state. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a three-dimensional structure schematic diagram of the high-reliability calibration mechanism with emergency exit capability in case of failure provided by the application in the light shielding state.

[0028] Figure 2 It is a three-dimensional structure schematic diagram of the high-reliability calibration mechanism with emergency exit capability in case of failure provided by the application in the light transmission state. Figure 1top view (clockwise rotation 180°) of the

[0029] Figure 3 schematic diagram of the three-dimensional structure of the embodiment of the present application in the light-transmitting state;

[0030] Figure 4 schematic diagram of the three-dimensional structure of the embodiment of the present application in the fault exit state;

[0031] Figure 5 top view of the Figure 4

[0032] Figure 6 schematic diagram of the three-dimensional structure of the scaling assembly in the embodiment of the present application;

[0033] Figure 7 schematic diagram of the three-dimensional structure of the base in the embodiment of the present application;

[0034] Figure 8 schematic diagram of the three-dimensional structure of the locking release assembly in the embodiment of the present application;

[0035] Figure 9 schematic diagram of the connection of the notch bolt, the base and the scaling fixing frame in the embodiment of the present application (the shell is not shown).

[0036] The reference signs are explained as follows:

[0037] 1-scaling fixing frame, 2-motor, 3-motor mounting frame, 4-first coupling, 5-base, 51-fixing seat, 6-first torsional spring, 7-scaling assembly, 71-rotating shaft, 72-counterweight, 73-scaling plate, 74-baffle, 8-second torsional spring, 9-butting cone rod, 91-butting cone rod groove, 10-proximity switch, 11-potentiometer, 12-magnetic steel mounting arm, 13-potentiometer mounting frame, 14-locking release assembly, 141-shell, 142-heater, 143-shape memory alloy tube, 144-notch bolt, 18-stop block, 19-flipping shaft, 20-second coupling. DETAILED DESCRIPTION

[0038] The present application is further described below in conjunction with the drawings and exemplary embodiments.

[0039] With reference to Figures 1-9 , the high-reliability scaling mechanism with fault emergency exit capability comprises a scaling fixing frame 1, a base 5, an execution assembly, a driving assembly, a feedback assembly, a locking release assembly, a butting locking assembly and a main controller, wherein the scaling fixing frame 1 is fixedly installed at the light inlet of a space optical remote sensing camera, and the base 5 is arranged on the scaling fixing frame 1, so as to reduce the self-weight of the whole mechanism, and the scaling fixing frame 1 is made of aluminum alloy material. The structure of the base 5 is as shown in Figure 7 ​As shown, two fixed seats 51 are oppositely arranged at two ends of the base 5, and a motor mounting rack 3 and a potentiometer mounting rack 13 are respectively arranged on the base 5 and outside the two fixed seats 51, both of which are made of aluminum alloy material to reduce the weight.

[0040] The execution assembly includes a calibration assembly 7 and a motor 2, the motor 2 is connected to the motor mounting rack 3, and the control end of the motor 2 is connected to the main controller, and the calibration assembly 7 has a structure as shown in Figure 6 As shown, it includes a rotating shaft 71, a counterweight 72, a calibration plate 73, and a baffle 74. In this embodiment, a pair of angular contact ball bearings are arranged in the fixed seat 51 close to the motor 2, and a deep groove ball bearing is arranged in the other fixed seat. The two ends of the rotating shaft 71 are rotatably connected to the angular contact ball bearings and the deep groove ball bearing, which can meet the working requirements of the shafting in a large temperature change environment. One end of the rotating shaft 51 is connected to the output end of the motor 2 through the first coupling 4. The calibration plate 73 is located between the two fixed seats 51 and is connected to the outer wall of one side of the rotating shaft 71. If the rotating shaft 71 is processed into a cylindrical shape, the connection difficulty of the calibration plate 73 will be increased. Therefore, in this embodiment, the section of the rotating shaft 71 connected to the calibration plate 73 is rectangular, so that the calibration plate 73 is connected to a flat surface, simplifying the connection difficulty. Because the calibration plate 73 is connected to the outer wall of one side of the rotating shaft 71, the center of mass of the entire calibration assembly 7 is not located on the rotating shaft 71, which will bring additional torque to the motor 2. In order to avoid the additional torque from burdening the motor 2, a counterweight 72 is connected to the outer wall of the other side of the rotating shaft 71 opposite to the calibration plate 73 through screws to balance the additional torque. Because the rotating shaft 71 needs to be connected to the calibration plate 73 and the counterweight 72, the structural strength is very important, so the rotating shaft 71 is made of titanium alloy material. In order to reduce the weight and moment of inertia of the entire calibration assembly 7, the calibration plate 73 is made of aluminum alloy material, and the counterweight 72 is made of H62 brass material. In order to avoid the phenomenon of light leakage in the light shielding state, the surfaces of the calibration plate 73 and the base 5 are sprayed with anti-glare paint.

[0041] A stop block 18 is arranged on each side of the fixed seat 51 close to the motor 2, and a baffle 74 is integrally arranged on one end of the calibration plate 73 close to the stop block 18. As shown in Figure 1 、 Figure 2 , when the calibration plate 73 is rotated to the side away from the turnover shaft 19 and is in a horizontal state, the entire calibration mechanism is in a light shielding state as shown in Figure 3The light-transmitting state is shown, the light of the space optical remote sensing camera is not blocked. Therefore, the positions of the stop blocks 18 and the baffle 74 satisfy: when the calibration plate 73 is turned to the side away from the turnover shaft 19 and is in a horizontal state, and when the calibration plate 73 is turned to the side close to the turnover shaft 19 and is in a horizontal state, the baffle 74 is in abutment with the two stop blocks 18 respectively, so that the motor 2 does not need to have high movement precision, and the two stop blocks 18 serve as limit positions to ensure that the calibration plate 73 is in a light-blocking or light-transmitting state when the baffle 74 is in abutment with the stop blocks 18.

[0042] The driving assembly includes the turnover shaft 19, the first torsional spring 6 and the second torsional spring 8. The turnover shaft 19 is fixed on one side of the calibration fixing frame 1 through a screw, and the axis of the turnover shaft 19 is parallel to the rotating shaft 71. The turnover shaft 19 is hinged to the hinge seats arranged on the two fixed seats 51 close to the turnover shaft 19. The first torsional spring 6 and the second torsional spring 8 are arranged at the two ends of the turnover shaft 19 respectively, and one end of each of the first torsional spring 6 and the second torsional spring 8 is connected to the base 5, and the other end is connected to the calibration fixing frame 1.

[0043] The feedback assembly includes the potentiometer 11, the proximity switch 10 and the magnetic steel mounting arm 12 for cooperating with the proximity switch 10. The potentiometer 11 is connected to the potentiometer mounting frame 13. The output end of the potentiometer 11 is connected to the main controller, for monitoring the rotation angle of the calibration plate 73. The input end of the potentiometer 11 is fixed to the other end of the rotating shaft 71 through the second coupling 20, so that the potentiometer 11 can monitor the rotation angle of the entire calibration assembly 7 in real time when the rotating shaft 71 rotates. The proximity switch 10 and the potentiometer 11 are backup measurement means for each other. The proximity switch 10 is arranged on the side of the potentiometer mounting frame 13 close to the fixed seat 51, and two proximity switches 10 are arranged. The magnetic steel mounting arm 12 is fixed to the outer wall of the rotating shaft 71 between the second coupling 20 and the fixed seat 51, and the positions of the magnetic steel mounting arm 12 and the proximity switch 10 satisfy: when the calibration plate 73 is turned to the side away from the turnover shaft 19 and is in a horizontal state, or when the calibration plate 73 is turned to the side close to the turnover shaft 19 and is in a horizontal state, the magnetic steel mounting arm 12 is inducted by the two proximity switches 10 respectively. The output ends of the two proximity switches 10 are connected to the main controller, so that whether the calibration plate 73 is in a light-blocking or light-transmitting state can be detected through the two proximity switches 10.

[0044] The structure of the locking and releasing assembly 14 is shown in FIG. 4. Figure 8As shown, including the shell 141 and set in the shell 141 heater 142, notch bolt 144, shape memory alloy tube 143, notch bolt 144, shape memory alloy tube 143 and heater 142 from inside to outside in turn set in the shell 141, the shell 141 is connected by bolt in the calibration fixed frame 1 bottom, in the calibration fixed seat 1 corresponding to the position of the notch bolt 144 set through hole, in the base 5 corresponding to the position of the through hole set screw hole, the notch bolt 144 through the through hole after spin in the screw hole, so as to connect the calibration fixed frame 1 and the base 5 together through the notch bolt 144, its connection diagram as shown in Figure 9 As shown, and set in the notch bolt 144 notch, notch is located at the base 5 and the calibration fixed frame 1 of the combination surface, the control end of the heater 142 and the main controller, when the main controller detects the fault, start the heater 142, the heater 142 will shape memory alloy tube 143 heated to about 80 DEG C, shape memory alloy tube 143 will deformation, under the action of the shape memory alloy tube 143 phase transition force, the notch bolt 144 will be broken at the notch, so that the base 5 and the calibration fixed frame 1 lose connection.

[0045] In order to ensure that the calibration mechanism is in the failure exit state as shown in Figure 4 、 Figure 5 As shown, the base 5 and the various components installed on the base 5 will not sway, but also set up docking locking assembly, docking locking assembly includes set in the fixed seat 51 top near the potentiometer 11 docking cone 9 and set in the same side of the calibration fixed frame 1 on the side wall of the flip shaft 19 docking cone groove 91, the position of docking cone groove 91 and docking cone 9 set to meet: when the base 5 rotates around the flip shaft 19 to the base 5 bottom surface is in horizontal state, the docking cone 9 is inserted into the docking cone groove 91, the position of the base 5 after rotating around the flip shaft 19 is locked and fixed, the docking cone 9 and the docking cone groove 91 are made of titanium alloy material to ensure the strength.

[0046] In normal use, the motor 2 drives the calibration assembly 7 to rotate to adjust the amount of light, the potentiometer 11 real-time feedback of the calibration assembly 7 rotation angle, when the calibration plate 73 rotates to the side away from the flip shaft 19 and is in horizontal state, it is in the light shielding state, if there is no need to shield light, the motor 2 drives the calibration assembly 7 reverse rotation, when the calibration plate 73 rotates to the side close to the flip shaft 19 and is in horizontal state, it is in the light transmission state.

[0047] If the calibration plate 73 is in the light shielding position and the motor 2 fails, the main controller detects that the motor 2 cannot rotate through the potentiometer 11, and emergency exit for failure needs to be performed. First, the main controller starts the heater 142, and when the shape memory alloy tube 143 is heated to about 80 DEG C, the shape memory alloy tube 143 will deform. Under the action of the phase transition force of the shape memory alloy tube 143, the gap bolt 144 breaks at the gap, so that the base 5 and the calibration fixing frame 1 lose connection. Then, under the action of the first torsional spring 6 and the second torsional spring 8, the entire base 5 will rotate around the turnover shaft 19, so that the calibration plate 73 no longer shields the light of the space optical remote sensing camera, avoiding the influence on the light path of the camera. When the base 5 rotates around the turnover shaft 19 until the bottom surface of the base 5 is in a horizontal state, the docking cone rod 9 is inserted into the docking cone rod slot 91, and the position of the base 5 after rotating around the turnover shaft 19 is locked and fixed, fully ensuring the reliability of the mechanism.

[0048] The above-described embodiments are merely used to describe the specific implementation of the present application, and are not used to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope of the present application defined by the claims.

Claims

1. A high reliability pointing mechanism with fail-safe egress capability, characterized by: The application relates to a calibration fixing frame (1), a base (5), an executing assembly, a driving assembly, a feedback assembly, a locking and releasing assembly (14) and a main controller. The calibration fixing frame (1) is fixedly installed at a light inlet of a space optical remote sensing camera, and the base (5) is arranged on the calibration fixing frame (1). The executing assembly comprises a calibration assembly (7) and a motor (2); two fixed seats (51) are oppositely arranged at two ends of the base (5), the motor (2) is connected to the base (5), the calibration assembly (7) comprises a rotating shaft (71) and a calibration plate (73), the rotating shaft (71) is rotationally connected with the two fixed seats (51) respectively, and one end of the rotating shaft (71) is connected with an output end of the motor (2); the calibration plate (73) is located between the two fixed seats (51) and is connected with an outer wall of one side of the rotating shaft (71); and a control end of the motor (2) is connected with the main controller, so as to control the rotating angle of the calibration plate (73) to adjust the light quantity. The driving assembly is used for overturning the base (5) in case of failure, and comprises a overturning shaft (19) and a torsional spring; the overturning shaft (19) is fixed at one side of the calibration fixing frame (1), the axis line of the overturning shaft (19) is parallel to the rotating shaft (71), and the overturning shaft (19) is hingedly connected to one side of the base (5) close to the overturning shaft (19); and the torsional spring is sleeved on the overturning shaft (19) and has two ends connected with the base (5) and the calibration fixing frame (1) respectively. The feedback assembly comprises a potentiometer (11) arranged on the base (5), and the other end of the rotating shaft (71) is connected with an input end of the potentiometer (11); an output end of the potentiometer (11) is connected with the main controller, so as to monitor the rotating angle of the calibration plate (73). The locking and releasing assembly (14) comprises a shell (141), a heater (142), a notched bolt (144) and a shape memory alloy pipe (143) arranged in the shell (141); the shell (141) is connected to the bottom of the calibration fixing frame (1), the notched bolt (144), the shape memory alloy pipe (143) and the heater (142) are sequentially sleeved in the shell (141) from inside to outside, the notched bolt (144) is used for connecting the calibration fixing frame (1) and the base (5), and a notch is arranged on the notched bolt (144) and located at the joint surface of the base (5) and the calibration fixing frame (1); and a control end of the heater (142) is connected with the main controller, so as to start the heater (142) to heat the shape memory alloy pipe (143) in case of failure, and the notched bolt (144) is disconnected at the notch under the action of a phase change force.

2. The high reliability pointing mechanism with fail-safe egress capability of claim 1, wherein: The application further comprises a docking locking assembly. The docking locking assembly comprises a docking cone rod (9) arranged at the top of one of the fixing bases (51) and a docking cone rod slot (91) arranged on the side wall of the fixed frame (1) on the same side of the rotating shaft (19), and the positions of the docking cone rod slot (91) and the docking cone rod (9) satisfy that the docking cone rod (9) is inserted into the docking cone rod slot (91) when the base (5) is rotated around the rotating shaft (19) to the bottom surface of the base (5) being in a horizontal state.

3. The high reliability pointing mechanism with fail-safe egress capability of claim 2, wherein: The base (5) is provided with a motor mounting frame (3) and a potentiometer mounting frame (13); the motor mounting frame (3) and the potentiometer mounting frame (13) are respectively located on the outer sides of the two fixing bases (51). The motor (2) is connected to the motor mounting frame (3), and the output end of the motor (2) is fixedly connected to one end of the rotating shaft (71) through the first coupling (4). The potentiometer (11) is connected to the potentiometer mounting frame (13), and the input end of the potentiometer (11) is fixedly connected to the other end of the rotating shaft (71) through the second coupling (20).

4. The high reliability scaling mechanism with failure emergency exit capability of claim 3, wherein: The feedback assembly further comprises a proximity switch (10) and a magnetic steel mounting arm (12) for cooperating with the proximity switch (10). The magnetic steel mounting arm (12) is fixedly connected to the outer wall of the rotating shaft (71) between the second coupling (20) and the fixing base (51); the proximity switch (10) is arranged on the side of the potentiometer mounting frame (13) close to the fixing base (51), and two proximity switches (10) are arranged on the two sides of the second coupling (20); the positions of the magnetic steel mounting arm (12) and the proximity switch (10) satisfy that the magnetic steel mounting arm (12) is respectively inducted by the two proximity switches (10) when the calibration plate (73) is rotated to the side away from the rotating shaft (19) and is in a horizontal state, or the calibration plate (73) is rotated to the side close to the rotating shaft (19) and is in a horizontal state, and the output ends of the two proximity switches (10) are respectively connected to the main controller.

5. The high reliability scaling mechanism with failure emergency exit capability of claim 4, wherein: The calibration assembly (7) further comprises a counterweight (72); one section of the rotating shaft (71) connected with the calibration plate (73) is rectangular in cross section, and the counterweight (72) is connected to the outer wall of the rotating shaft (71) on the side opposite to the calibration plate (73) through screws.

6. The high reliability scaling mechanism with failure emergency exit capability of claim 5, wherein: Two stop blocks (18) are arranged on the two sides of one of the fixing bases (51), and a baffle (74) is arranged on the end of the calibration plate (73) close to the stop block (18), and the positions of the stop block (18) and the baffle (74) satisfy that the baffle (74) respectively abuts against the two stop blocks (18) when the calibration plate (73) is rotated to the side away from the rotating shaft (19) and is in a horizontal state, and the calibration plate (73) is rotated to the side close to the rotating shaft (19) and is in a horizontal state.

7. The high reliability scaling mechanism with failure emergency exit capability of claim 6, wherein: The torsional spring comprises a first torsional spring (6) and a second torsional spring (8), which are arranged at the two ends of the rotating shaft (19).

8. The high reliability scaling mechanism with failure emergency exit capability of claim 1, wherein: One of the fixed seats (51) is provided with a pair of angular contact ball bearings, and the other fixed seat is provided with a deep groove ball bearing, and the two ends of the rotating shaft (71) are connected to the two fixed seats (51) through the angular contact ball bearings and the deep groove ball bearing respectively.

9. The high reliability scaling mechanism with failure emergency exit capability of claim 5, wherein: The rotating shaft (71), the butt joint conical rod (9) and the butt joint conical rod groove (91) are made of titanium alloy; the fixed frame (1), the fixed plate (73), the motor mounting frame (3) and the potentiometer mounting frame (13) are made of aluminum alloy; and the counterweight (72) is made of brass.

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