Pressurizing rotating mechanism suitable for zero-gravity environment

Abstract

The invention provides a pressurizing rotating mechanism suitable for a zero-gravity environment. The pressurizing rotating mechanism comprises a rotating transmission rod, a releasing part, a pressurizing part and a tool bit part. The rotating transmission rod is used for transmitting rotating power to the tool bit part; the releasing part is used for locking the pressurizing part during non-machining; during machining, the pressurizing component is released, the pressurizing component applies downward pressing acting force to the upper end of the tool bit component, and it is guaranteed that the tool bit is stably pressed to make close contact with a cut object in the rotating process.

Description

Technical Field

[0001] The present invention relates to the field of spacecraft mechanism motion technology, and in particular to the field of space maintenance technology. Background Art

[0003] In view of the need for pressurized rotation operation of maintenance tools in a zero-gravity environment, it is necessary to provide a pressurized rotation mechanism on the maintenance tool to assist astronauts in completing the pressurized rotation and reset operation of the maintenance tool through simple operations. In view of the characteristics of operating maintenance tools in the extravehicular space environment, in order to ensure that the equipment can achieve pressurized rotation and reset of the maintenance tool with a single action, the technical problem of operability is solved so that astronauts can use it conveniently and effectively in a zero-gravity environment.

[0004] Existing EVE tools all provide a single motion function, such as screw power tools. When astronauts use tools to install or remove screws, they apply the pressure themselves, and the magnitude and direction of the force cannot be stably controlled. In other words, existing EVE tools cannot achieve stable and continuous multi-dimensional motion (rotation and pressurization) maintenance functions. Summary of the invention

[0005] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art and provide a pressurized rotation mechanism suitable for a zero-gravity environment, so as to ensure that astronauts can quickly and conveniently realize the rotation operation of the tool in a zero-gravity environment.

[0006] The technical solution of the present invention is: a pressurized rotating mechanism suitable for a zero-gravity environment, comprising a rotating transmission rod, a release component, a pressurizing component and a cutter head component;

[0007] The rotation transmission rod is used to transmit the rotational power to the cutter head component;

[0008] The release component is used to lock the pressure component when not processing; the pressure component is released during processing, and the pressure component applies a downward pressure force on the upper end of the cutter head component to ensure that the cutter head is stably under pressure and in close contact with the cutting object during rotation.

[0009] Preferably, the release component includes an operating handle, a return spring, a locking pin, a baffle, and a housing;

[0010] The shell is provided with a through hole for the rotating transmission rod to pass through, and a groove perpendicular to the axis of the through hole, one end face of the groove is connected to the through hole, and the locking pin is installed in the groove, the large diameter end of the locking pin is a free end, the operating handle and the small diameter end of the locking pin are connected by a rotating shaft, and the movement path of the operating handle is limited by the baffles on both sides installed on the shell to prevent the operating handle from rotating with the positioning pin as the center; the reset spring is sleeved on the small diameter end of the locking pin placed in the groove, and in the locked state, the reset spring is compressed with the shell as the reference and keeps the elastic force acting on the locking pin, and in the pressurized state, the operating handle is subjected to force, and the locking pin is pulled up by the rotating shaft, and the locking pin is released from the locked position and unlocked.

[0011] Preferably, the operating handle includes an operating rod and a triangular platform with angles at the front end, and the triangular platform consists of three surfaces A, B, and C respectively, wherein the A and B planes are state-fixed platforms, and the C plane is connected to the operating rod; the A and B planes are set with arc surfaces to transition to become the rotation contact points of the triangular platform; a positioning pin hole is set between the A and B planes as the center of overall rotation of the operating handle; the length of the A plane is set to be more than twice the length of the B plane to ensure that the distance between the positioning pin hole and the B plane is more than 3 times the distance between the A planes; the operating rod consists of two planes E and F, wherein the E plane is parallel to the B plane, and the F plane is parallel to the A plane; the positioning pin makes the A plane or B plane of the operating handle contact with the shell through the rotating shaft to maintain a stable state; in the pressurized state, the operating handle is subjected to force, and the operating handle rotates from the A plane to the B plane with the front contact point as the fulcrum. Because the distance between the positioning pin hole and the B plane is more than 3 times the distance between the A planes, the rotating shaft is lifted with the position of the positioning pin hole, and the locking pin is pulled up at the same time, and the locking pin is disengaged from the locking position.

[0012] Preferably, the pressurizing component includes an energy storage spring, a housing structure, an observation port and a reset handle;

[0013] The shell structure is a cylindrical structure, the upper end of which is installed below the through hole of the release component shell, forming an integral sleeve outside the cutter head component. The lower end of the shell structure opens an observation port for observing the movement of the cutter head component. The energy storage spring is installed in the shell structure and arranged at the upper end of the cutter head component. In the released state, the energy storage spring expands and releases elastic force, exerting a downward pressure on the upper end of the cutter head component to ensure that the cutter head is stably under pressure and in close contact with the cutting object during rotation; the reset handle is installed at both ends of the release component shell, which is used to overcome the external force of the energy storage spring and drive the shell structure and the release component shell to reset to the locked position.

[0014] Preferably, the rotating transmission rod is composed of an outer shell and an internal power transmission shaft, the upper port of the shell is provided with a mechanical constraint interface of a power device that provides rotational power, and the lower port is provided with an annular locking surface, and the pressure-applying component can effectively achieve a 360° locking state around the annular locking surface.

[0015] Preferably, the upper end of the shell structure is connected to the release component shell through a stepped flange surface, and an annular groove with an opening facing upward is arranged inside the shell structure. A stepped surface is arranged on the outer side of the inner wall of the annular groove for cooperating with the lower end of the annular locking surface. The center through hole of the annular groove is used to place the lower end of the rotating transmission rod and the upper end of the cutter head component, and the cutter head component is fixed at the bottom of the annular groove.

[0016] Preferably, the tool head component includes a transmission shaft adapter, a tool head adapter, and a drilling tool head;

[0017] The drilling cutter head is connected to the rotating transmission rod through a cutter head adapter and a transmission shaft adapter; the transmission shaft adapter is a sleeve structure with a flange, the rotating transmission rod is sleeved in the sleeve structure and connected to the cutter head adapter through a flange.

[0018] Preferably, the drilling head includes a blade body and blades distributed on the blade body, and the blades are multiple and evenly distributed on the blade body in the circumferential direction; each blade includes a front angle indicating the degree of inclination of the front blade face, a back angle indicating the degree of friction of the back blade face during the cutting process, a side angle indicating the beveling angle of the blade during the beveling process, and a blade tip according to the movement mode of the blade; the side angle is set to 24.9°~25.1° to ensure that in a vacuum environment, under the low-speed condition that the blade shaft rotates at a speed not exceeding 50° / s, the blade tip can feed and cut autonomously under constant pressure.

[0019] Preferably, the blade rake angle is set to 59.9° to 60.1° to improve the drilling efficiency of the cutter head.

[0020] Preferably, the back angle of the blade is set to 28.4° to 28.6° to improve the surface finish of the drilled hole.

[0021] Preferably, the knife tip has a rounded front end with a diameter ranging from 0.5 mm to 1 mm.

[0022] The beneficial effects of the present invention compared with the prior art are:

[0023] The present invention is an invention of a pressurized rotating mechanism suitable for a zero-gravity environment, which is an important guarantee for ensuring that astronauts can quickly and conveniently perform rotating operations in a zero-gravity environment. A pressurized rotating mechanism suitable for a zero-gravity environment is composed of a rotating transmission rod, a release component, a pressurized component, and a cutter head component. It can enable Chinese astronauts to conveniently perform tool rotation operations outside the cabin, demonstrating my country's aerospace technology.

[0024] The invention ensures that the cutter head is stably pressed and in close contact with the cutting object during the rotation process under the action of the pressurizing component, improves the rotation and grinding efficiency of the cutter head component, and solves the technical problem of operability of astronauts in drilling operations in a zero-gravity environment. The pressurizing component can be repeatedly operated by resetting the handle, ensuring the feasibility of repeated operations of astronauts' extravehicular maintenance operations.

[0025] The present invention can realize the stable application of downward pressure on the upper end of the cutter head component through the "release" operation of the release component, and use a simple operation conversion mechanism to provide a stable downward pressure, so that the tool can still realize the characteristic of rotating grinding of the cutter head component in a zero-gravity environment.

[0026] The present invention uses a reset handle to release the automatic locking feature of the component after the cutter head component returns to its original initial position, thereby reducing the locking operation of the astronaut and facilitating the next feeding operation of the cutter head component.

[0027] The present invention adopts a floating connection method through a specific shape setting between the transmission shaft adapter and the rotating transmission rod to effectively ensure that the cutter head can still effectively transmit the rotational force under the load-bearing downward pressure state.

[0028] The present invention arranges the annular locking surface of the power transmission rod shape, and the locking surface of the pressurizing component around the power transmission rod can effectively achieve a 360-degree locking state. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a pressurized rotating mechanism suitable for a zero-gravity environment;

[0030] Figure 2 It is a schematic diagram of the release component composition;

[0031] Figure 3 It is a schematic diagram of the locking state of the release component;

[0032] Figure 4 It is a schematic diagram of the release state of the release component;

[0033] Figure 5 It is a schematic diagram of the pressurized components;

[0034] Figure 6 It is a schematic diagram of the rotating transmission rod;

[0035] Figure 7 It is a schematic diagram of the cutter head components;

[0036] Figure 7-1 Schematic diagram of the transmission shaft adapter;

[0037] Figure 8 A schematic diagram of the initial position of a pressurized rotating mechanism suitable for a zero-gravity environment;

[0038] Fig. 9 It is a schematic diagram of lifting and releasing the components;

[0039] Fig.10 This is a schematic diagram of the spring release of the pressurized component;

[0040] Fig.11 It is a schematic diagram of the spring pressing down and releasing of the pressurized component;

[0041] Fig.12 Schematic diagram of lifting the handle to reset the pressurized component;

[0042] Figure 13-18 Schematic diagram of the cutter head parts

[0043] Fig.19 Schematic diagram of the operating handle. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-19 The present invention is further illustrated by the following examples.

[0045] The invention provides a pressurizing rotating mechanism suitable for a zero-gravity environment. The device is composed of a rotating transmission rod, a releasing component, a pressurizing component and a cutter head component.

[0046] The astronauts squeeze the operating handle of the release component, and the operating handle drives the locking pin to release the pressurized component. The pressurized component releases the elastic force in the "released" state through the energy storage spring, exerting a downward pressure on the upper end of the cutter head component to ensure that the cutter head is stably under pressure and in close contact with the cutting object during rotation.

[0047] The cutter head component is the target component of the pressure component. By applying a downward pressure force on the upper end of the cutter head component, the rotational grinding efficiency of the cutter head component is improved. The transmission shaft adapter ensures that the cutter head can still effectively transmit the rotational force under the load and downward pressure.

[0048] 1) Turn the transmission rod

[0049] The rotating transmission rod provides the function of transmitting the rotating power of the power device to the cutter head component, and is composed of an outer shell and an inner power transmission shaft. Figure 6 ) The power transmission shaft can effectively transmit the rotational power source from the power input interface to the lower end cutter head component;

[0050] The upper port of the shell is provided with a mechanical constraint interface of the power device, and the lower port is provided with an annular locking surface. The locking surface of the pressurized component around the power transmission rod can effectively achieve a 360° locking state.

[0051] The power transmission shaft can effectively transmit the rotational power from the power input interface to the lower power output interface, and the lower port is provided with a rotational power rotation feature that matches the cutter head component.

[0052] 2) Release components

[0053] The release component is set to two states, corresponding to the "pressurized" and "locked" states, and there are no other states.

[0054] The release component consists of an operating handle, a locking pin, a rotating shaft, a baffle, a housing and a return spring ( Figure 2 The housing is provided with a through hole for the rotating transmission rod to pass through, and a groove perpendicular to the axis of the through hole, one end face of the groove is connected to the through hole, a locking pin is installed in the groove, the large diameter end of the locking pin is a free end, the operating handle and the small diameter end of the locking pin are connected by a rotating shaft, and the movement path of the operating handle is limited by the baffles on both sides installed on the housing to prevent the operating handle from rotating around the positioning pin as the center; the return spring is sleeved on the small diameter end of the locking pin placed in the groove, in the locked state, the return spring is compressed with the housing as the reference and keeps the elastic force acting on the locking pin, in the pressurized state, the operating handle is subjected to force, and the locking pin is pulled up by the rotating shaft, and the locking pin is released from the locked position and unlocked.

[0055] like Fig.19 As shown, the operating handle includes an operating rod and a triangular platform with angles at the front end. The triangular platform consists of three surfaces A, B, and C, respectively, wherein the A and B planes are state-fixed platforms, and the C plane connects the operating rod. The A and B planes are 60° to each other and a circular arc surface is set to transition to become the rotation contact point of the triangular platform; a positioning pin hole is set between the A and B surfaces, which is also the center of the overall rotation of the operating handle. The length of the A plane is set to be more than twice the length of the B plane, ensuring that the distance between the positioning pin hole and the B plane is more than 3 times the distance between the A planes; the operating rod consists of two planes E and F, wherein the E plane is parallel to the B plane, and the F plane is parallel to the A plane, so that the E plane and the F plane are 120° to each other. When the operating handle is rotated, the E surface or the F surface appears as a state plane, which is convenient for operation.

[0056] After the return spring is compressed with the housing as the reference, it always keeps the elastic force acting on the positioning pin. The positioning pin makes the A plane or B plane of the operating handle contact with the housing through the rotating shaft to maintain a stable state ( Figure 3 ); When the pressure is applied, the operating handle is stressed, and the operating handle rotates from plane A to plane B with the front contact point as the fulcrum. Because the distance between the positioning pin hole and plane B is more than 3 times the distance between the A planes, the rotating shaft is lifted along with the positioning pin hole, and the locking pin is pulled up at the same time, and the locking pin is out of the locking position. ( Figure 4 )

[0057] The reset spring is compressed at the same time, continuously providing elastic force to act on the positioning pin. When the reset operation is performed, when the locking surface appears at the front end of the positioning rod, it will automatically move forward into the locking position under the action of the spring force. The plane of the operating handle contacts the shell and maintains a stable state.

[0058] The baffles on both sides of the operating handle are used to limit the movement path of the operating handle to prevent the operating handle from rotating with the positioning pin as the center.

[0059] The reset spring force should be controlled within the range of 5N to 10N. If the spring force is too large, it will affect the astronauts’ release of the operating handle; if the spring force is too small, it will affect the effective entry of the positioning pin into the positioning hole. 3) Pressurized components

[0060] The pressurizing component consists of an energy storage spring, a shell structure, an observation port and a reset handle.

[0061] The shell structure is a cylindrical structure, the upper end of which is installed below the through hole of the release component shell, forming an integral sleeve outside the cutter head component. The lower end of the shell structure opens an observation port for observing the movement of the cutter head component. The energy storage spring is installed in the shell structure and arranged at the upper end of the cutter head component. In the released state, the energy storage spring expands and releases elastic force, exerting a downward pressure on the upper end of the cutter head component to ensure that the cutter head is stably pressed and in close contact with the cutting object during the rotation process; the reset handle is installed at both ends of the release component shell to overcome the external force of the energy storage spring and drive the shell structure and the release component shell to reset to the locked position. It is convenient for astronauts to evenly bear force on both sides during the reset operation, compress the energy storage spring to restore the pressurized component to the original locked position.

[0062] The rotating transmission rod is composed of an outer shell and an inner power transmission shaft. The upper end of the shell is provided with a mechanical constraint interface of a power device that provides rotating power, and the lower end is provided with an annular locking surface. The pressure component can effectively achieve a 360° locking state around the annular locking surface. The annular locking surface and the lower end surface of the shell are a fixed integrated structure. The outer diameter of the annular locking surface is twice the diameter of the middle section of the shell, which is used for limiting the load when the pressure component moves. The shell and the power rotating shaft are connected through bearings A and B. The inner diameter of the annular locking surface is smaller than that of bearing B and larger than the diameter of the power transmission shaft, which can effectively limit the bearing B.

[0063] The upper end of the shell structure is connected to the release component shell through a stepped flange surface. An annular groove with an opening facing upward is arranged inside the shell structure. A stepped surface is arranged on the outer side of the inner wall of the annular groove for cooperating with the lower end of the annular locking surface. The central through hole of the annular groove is used to place the lower end of the rotating transmission rod and the upper end of the cutter head component. The cutter head component is fixed at the bottom of the annular groove.

[0064] The energy storage spring and the housing structure are arranged at the upper end of the cutter head component, and the housing structure is provided with a cutter head component observation port to facilitate astronauts to observe the movement of the cutter head component. Fig.11As shown in the figure, the energy storage spring expands and releases elastic force in the pressurized state, exerting a downward pressure on the upper end of the cutter head component to ensure that the cutter head is stably under pressure and in close contact with the cutting object during rotation; in the "locked" state, the energy storage spring is compressed to store elastic force, canceling the downward pressure on the upper end of the cutter head component.

[0065] The energy storage spring force should be controlled within the range of 25N to 30N. When the spring force is too large, it will increase the difficulty for astronauts to reset the cutter head component. In order to overcome the 25N to 30N elastic force of the energy storage spring, a reset handle is specially provided on two sides of the cutter head component. When the spring force is too small, it will not be possible to effectively pressurize the cutter head component. In a zero-gravity environment, pressurization by the energy storage spring force can effectively achieve effective contact between the cutter head and the maintenance object.

[0066] 4) Blade head parts

[0067] The cutter head component is composed of a transmission shaft adapter, a cutter head adapter, and a drilling cutter head. The device is set in a specific shape between the transmission shaft adapter and the rotating transmission rod, and adopts a floating connection method to effectively ensure that the cutter head can still effectively transmit the rotational force under the load-bearing downward pressure state.

[0068] The drive shaft adapter adopts a regular hexagonal hole with an inscribed circle diameter of 6mm ( Figure 8 ), matches with the regular hexagonal shaft of the output interface of the power transmission shaft, and the two transmit the rotational torque through the hexagonal surface contact.

[0069] Transmission shaft adapter hole depth 25mm ( Figure 7-1 ), the pressurized part is in the "locked" ( Figure 8 ) and "release" ( Fig.11 ) The moving space distance required for the two states is 10mm. Therefore, there is no mechanical connection between the power transmission shaft and the transmission shaft adapter, and a floating limit is used. Under the action of the energy storage spring of the pressure component, the transmission shaft adapter can move in the axial direction of the power transmission shaft.

[0070] The cutter head is the target part of the pressure component. By applying downward pressure on the upper end of the cutter head, the cutting efficiency of the drilling cutter head is improved. The transmission shaft adapter mainly ensures that the cutter head can effectively transmit the rotational force after the cutter head moves downward due to pressure when the rotating transmission rod is fixed.

[0071] The drilling tool head of the present invention is a low-speed rotating tool head structure suitable for vacuum environment. In order to ensure the safety of drilling operation outside the astronaut cabin, the tool shaft rotation speed is not more than 50° / s. At the same time, the cutting feed of the blade is completed autonomously after the blade is subjected to constant pressure. It consists of a blade body 1 and a blade 2.

[0072] 1) Blade

[0073] The blade is set with a 20mm diameter space and an 11mm hexagonal hole at the bottom. The hexagonal shape facilitates installation while satisfying the transmission of rotational force. The blade is evenly distributed on the top of the blade ( Fig.13 ).

[0074] 2) Blade

[0075] The blade has four parts: front angle 21, back angle 22, side angle 23 and blade tip 24. Fig.15 ). In order to effectively improve the drilling efficiency, this blade parameter is particularly important. The rake angle indicates the inclination of the front cutting edge, which is the angle between the front cutting edge of the cutting edge and the surface of the material being cut. The larger the rake angle, the sharper the tool, but the blade strength will decrease; the back angle refers to the angle between the back cutting edge of the cutting edge and the surface of the material being cut, indicating the degree of friction of the back cutting edge during the cutting process. The larger the back angle, the less friction, the better the surface quality, and the sharpness of the cutting edge; the side angle refers to the angle between the side surface between the front cutting edge and the back cutting edge and the feed direction of the cutter head, indicating the cutting angle of the cutting edge during the cutting process. The smaller the side angle, the smaller the cutting force, which improves the cutting accuracy.

[0076] In view of the characteristics of low-density metal materials used in the outer shell of space capsule equipment, a large angle is selected in the design of the blade rake angle. When cutting the bevel blade to extrude the metal material, the stealing stress can be reduced, the thermal stress can be reduced, and the cutting surface finish can be effectively improved; a large angle is selected in the design of the blade back angle to improve the processing surface quality; a small angle is selected in the design of the blade side angle to reduce the cutting force and improve the processing accuracy.

[0077] According to the movement of the cutter head, 12 blades are evenly distributed around the blade; one blade is set every 30° ( Fig.14 ), according to the characteristics of low-speed rotation of the tool shaft, the structural form of the blade is innovatively designed (the blade side angle is 24.9°~25.1°, the blade front angle is set to 59.9°~60.1°, the blade back angle is set to 28.4°~28.6°, and the metal tip angle at the front end of the tool tip is within the range of 0.5mm~1mm). The front angle design in the direction of blade movement ensures the sharpness of the blade surface, and the blade back angle design reduces blade friction; according to the characteristics of the tool head used by astronauts in a vacuum environment, the above-mentioned parameter design ensures that the tool head can still process the cutting object under the conditions of low-speed movement and small cutting force on the tool tip, and has the characteristics of high-precision processing.

[0078] In a preferred embodiment of the present invention, the blade rake angle is set to 60° ( Fig.16 ), the blade back angle is set to 28.5°( Fig.17 ) forms a cutting angle of 31.5°, which increases the blade strength while ensuring the sharpness of the front blade and the small friction of the back blade; the blade side angle is set to 25° ( Fig.18), ensuring the sharp angle of the blade tip and the strength of the blade tip.

[0079] In order to remind astronauts that the cutter head is a dangerous item and is prohibited from touching it, red vacuum paint is applied to the outside of the cutter head so that astronauts can clearly see the cutter head area inside their space suits outside the cabin.

[0080] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A pressurized rotating mechanism suitable for a zero-gravity environment, characterized in that: It includes a rotating transmission rod, a release component, a pressurizing component and a cutter head component; The rotation transmission rod is used to transmit the rotational power to the cutter head component; The release component is used to lock the pressure component when not processing; the pressure component is released during processing, and the pressure component applies a downward pressure force on the upper end of the cutter head component to ensure that the cutter head is stably under pressure and in close contact with the cutting object during rotation.

2. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 1, characterized in that: The release component includes an operating handle, a return spring, a locking pin, a baffle, and a housing; The shell is provided with a through hole for the rotating transmission rod to pass through, and a groove perpendicular to the axis of the through hole, one end face of the groove is connected to the through hole, and the locking pin is installed in the groove, the large diameter end of the locking pin is a free end, the operating handle and the small diameter end of the locking pin are connected by a rotating shaft, and the movement path of the operating handle is limited by the baffles on both sides installed on the shell to prevent the operating handle from rotating with the positioning pin as the center; the reset spring is sleeved on the small diameter end of the locking pin placed in the groove, and in the locked state, the reset spring is compressed with the shell as the reference and keeps the elastic force acting on the locking pin, and in the pressurized state, the operating handle is subjected to force, and the locking pin is pulled up by the rotating shaft, and the locking pin is released from the locked position and unlocked.

3. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 2, characterized in that: The operating handle comprises an operating rod and a triangular platform with angles at the front end, wherein the triangular platform is composed of three surfaces A, B and C respectively, wherein the A and B planes are state-fixing platforms, and the C plane is connected to the operating rod; the A and B planes are provided with arc surfaces to transition to become the rotation contact points of the triangular platform; a positioning pin hole is provided between the A and B planes as the center of rotation of the operating handle as a whole; the length of the A plane is set to be more than twice the length of the B plane, ensuring that the distance between the positioning pin hole and the B plane is more than three times the distance between the A planes; the operating rod is composed of two planes E and F, wherein the E plane is parallel to the B plane, and the F plane is parallel to the A plane; the positioning pin makes the A plane or the B plane of the operating handle contact with the shell through the rotating shaft to maintain a stable state; in the pressurized state, the operating handle is subjected to force, and the operating handle rotates from the A plane to the B plane with the front contact point as the fulcrum, because the distance between the positioning pin hole and the B plane is more than three times the distance between the A planes, the rotating shaft is lifted along with the position of the positioning pin hole, and the locking pin is pulled up at the same time, and the locking pin is disengaged from the locking position.

4. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 2, characterized in that: The pressurizing component includes an energy storage spring, a housing structure, an observation port and a reset handle; The shell structure is a cylindrical structure, the upper end of which is installed below the through hole of the release component shell, forming an integral sleeve outside the cutter head component. The lower end of the shell structure opens an observation port for observing the movement of the cutter head component. The energy storage spring is installed in the shell structure and arranged at the upper end of the cutter head component. In the released state, the energy storage spring expands and releases elastic force, exerting a downward pressure on the upper end of the cutter head component to ensure that the cutter head is stably under pressure and in close contact with the cutting object during rotation; the reset handle is installed at both ends of the release component shell, which is used to overcome the external force of the energy storage spring and drive the shell structure and the release component shell to reset to the locked position.

5. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 4, characterized in that: The rotating transmission rod is composed of an outer shell and an inner power transmission shaft. The upper port of the shell is provided with a mechanical constraint interface of a power device that provides rotational power, and the lower port is provided with an annular locking surface. The pressure-applying component can effectively achieve a 360° locking state around the annular locking surface.

6. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 5, characterized in that: The upper end of the shell structure is connected to the release component shell through a stepped flange surface. An annular groove with an opening facing upward is arranged inside the shell structure. A stepped surface is arranged on the outer side of the inner wall of the annular groove for cooperating with the lower end of the annular locking surface. The central through hole of the annular groove is used to place the lower end of the rotating transmission rod and the upper end of the cutter head component. The cutter head component is fixed at the bottom of the annular groove.

7. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 1, characterized in that: The cutter head components include a transmission shaft adapter, a cutter head adapter, and a drilling cutter head; The drilling cutter head is connected to the rotating transmission rod through a cutter head adapter and a transmission shaft adapter; the transmission shaft adapter is a sleeve structure with a flange, the rotating transmission rod is sleeved in the sleeve structure and connected to the cutter head adapter through a flange.

8. The pressurized rotation mechanism suitable for zero-gravity environment according to claim 1 or 7, characterized in that: The drilling tool head includes a blade body and blades distributed on the blade body, wherein the number of the blades is multiple and uniformly distributed on the blade body in the circumferential direction; each blade includes a front angle indicating the degree of inclination of the front blade face, a back angle indicating the degree of friction of the back blade face during the cutting process, a side angle indicating the beveling angle of the blade during the beveling process, and a blade tip according to the movement mode of the blade; the side angle is set to 24.9°~25.1° to ensure that in a vacuum environment, under the low-speed condition that the blade shaft rotation speed is not greater than 50° / s, the blade tip can feed and cut autonomously under the action of constant pressure.

9. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 8, characterized in that: The blade rake angle is set to 59.9°~60.1° to improve the drilling efficiency of the cutter head.

10. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 8, characterized in that: The back angle of the blade is set to 28.4°~28.6° to improve the surface finish of the drilled hole.

11. The pressurized rotating mechanism suitable for zero-gravity environment according to claim 8, characterized in that: The knife tip has a rounded front end with a diameter ranging from 0.5 mm to 1 mm.

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