High reliability reciprocating propulsion mechanism for space environment

Abstract

The present invention provides a high-reliability reciprocating propulsion mechanism for a space environment, which belongs to the field of equipment for a space environment, and includes a movable handle, a fixed handle, a bracket, a push rod, a driving assembly and a locking assembly. The fixed handle and the bracket are fixed as a whole, serving as a carrier for installation. The movable handle and the fixed handle are hinged and provide driving force to the driving assembly. The driving assembly is arranged at the upper end of the movable handle and provides forward power to the push rod. The push rod moves forward and backward relative to the fixed handle, and the locking assembly locks or unlocks the push rod. The present invention uses a detachable ratchet mechanism to drive the push rod, which is relatively long-life and highly reliable in a space environment compared to the original use of friction to drive the push rod.

Description

Technical Field

[0001] The present invention belongs to the field of equipment for space environment, relates to a tool for astronauts, and in particular to a high-reliability reciprocating propulsion mechanism for space environment. Background Art

[0002] During the operation and maintenance of the space station, astronauts are required to complete related operational tasks on orbit, which often requires various special tools or equipment. This patent is similar to a glue gun mechanism. The traditional glue gun mechanism has a simple structure, and the driving part relies on friction, which is cost-effective. However, in the space environment, it has the following shortcomings:

[0003] In the high and low temperature environment of space, the drive relies on friction. Changes in the size of friction-related components and changes in matching dimensions will cause the friction force to be too small, making it impossible to achieve the force required for driving.

[0004] In the vacuum environment of space, friction-driven components need to undergo special surface treatment to prevent cold welding. However, the friction-driven process will cause the surface treatment coating to wear or even fall off. Long-term or frequent use will cause the coating to wear severely, which will cause product failure. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a high-reliability reciprocating propulsion mechanism for a space environment, which solves the problems in the background technology and adopts a detachable ratchet mechanism to drive the push rod. Compared with the original method of driving the push rod by friction, it can achieve long-life and high-reliability operation in a space environment.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-reliability reciprocating propulsion mechanism for a space environment, comprising a movable handle, a fixed handle, a bracket, a push rod, a driving assembly and a locking assembly, wherein the fixed handle and the bracket are fixed as a whole and serve as a carrier for installation, the movable handle and the fixed handle are hinged and provide driving force to the driving assembly, the driving assembly is arranged at the upper end of the movable handle and provides forward power to the push rod, the push rod moves forward and backward relative to the fixed handle, and the locking assembly locks or unlocks the push rod;

[0007] The driving assembly includes a driving mounting seat, which is mounted on the upper end of the movable handle and the two are fixed. The driving mounting seat is provided with a slide groove B, which is an oblong hole structure. A rotating shaft D is provided in the slide groove B, and the rotating shaft D slides in the slide groove B as a slider. A driving block is fixedly connected to the rotating shaft D, and the upper end of the driving block protrudes from the driving mounting seat. The end of the driving block away from the driving mounting seat cooperates with the tooth groove B on the push rod to achieve the stopping of the push rod.

[0008] The locking assembly includes a locking mounting seat, a trigger and a locking block. The locking mounting seat is fixed on the bracket. The locking block acts as a slider to move up and down relative to the locking mounting seat. The locking block is connected to the trigger through a rotating shaft to form a slider structure. The upper end of the locking block cooperates with the tooth groove A on the push rod, and the trigger serves as a driving mechanism of the locking assembly.

[0009] Furthermore, the slide groove B is an oblong hole structure, and the rotating shaft D and the slide groove B are clearance-matched.

[0010] Furthermore, a driving compression spring is provided between the lower end of the driving block and the movable handle, and a positioning groove is provided in the area on the upper end surface of the driving handle corresponding to the driving compression spring. The lower end of the driving compression spring is arranged in the positioning groove and provides a certain upward thrust to the driving block, so that the upper end of the driving block is always in contact with the tooth groove B on the push rod.

[0011] Furthermore, the lower end of the trigger is downwardly extended out of the bracket, and the trigger rotates relative to the bracket through the rotating shaft B. The rotating shaft B is fixed on the bracket as a pin for the rotation of the trigger 16. A slide groove A is provided on the trigger to add a degree of freedom to the locking assembly. The rotating shaft C is arranged in the slide groove A and forms a slide groove structure. During the rotation of the trigger, the rotating shaft C and the locking block are driven to move downward, thereby unlocking the locking assembly.

[0012] Furthermore, a locking compression spring is provided between the lower end of the locking block and the locking mounting seat, and the lower end of the locking compression spring sinks into the guide groove on the locking mounting seat and provides a certain thrust to the locking block.

[0013] Furthermore, a spring baffle and a push rod reset spring are provided inside the bracket. The spring baffle is installed on the push rod and is mainly used to limit the push rod reset spring. The push rod reset spring is arranged on the outer ring of the push rod and the two are coaxially arranged and installed between the spring baffle and the bracket to provide elastic force when the push rod is reset.

[0014] Furthermore, it also includes a cover plate, a sleeve A and a sleeve B. The sleeve A and the sleeve B are both installed on the fixed handle. The cover plate is arranged at the upper end of the fixed handle to seal the upper end of the fixed handle.

[0015] Furthermore, the lower end surface of the push rod is provided with two specifications of tooth groove structures, namely tooth groove A and tooth groove B. Tooth groove A cooperates with the end of the locking block, and its tooth pitch dimension a is slightly smaller than the tooth pitch dimension b of tooth groove B, thereby realizing the forward movement of the push rod in the driven state and locking in the non-driven state; tooth groove B cooperates with the end of the driving block, and the tooth pitch dimension b is slightly larger than the tooth pitch dimension a of tooth groove A, thereby realizing the forward movement of the push rod in the driven state.

[0016] Compared with the prior art, the present invention has the following advantages and positive effects.

[0017] 1. The present invention adopts a detachable ratchet mechanism to drive the push rod. Compared with the original method of driving the push rod by friction, it can work with high reliability and long life in a complex space environment, effectively ensuring the success of related maintenance tasks. Its beneficial effects are as follows:

[0018] 2. Compared with the typical shaft hole structure driven by friction, the detachable ratchet drive mechanism is insensitive to temperature changes. The typical shaft hole structure is the shaft hole gap, which is sensitive to temperature. The dimensional changes caused by high and low temperatures will affect the output of the driving force and even cause the inability to drive. The detachable ratchet drive mechanism is suitable for use in high and low temperature environments in space and has higher reliability;

[0019] 3. Compared with the typical shaft-hole structure driven by friction, the driving part of the detachable ratchet drive mechanism is a typical surface contact structure. The shaft-hole matching part of the typical shaft-hole structure is a line contact, which has a large contact stress. For the vacuum lubrication coating, it is not conducive to long-life use. The detachable ratchet drive mechanism is suitable for long-term or frequent use in a space vacuum environment and has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a cross-sectional view of the high-reliability reciprocating propulsion mechanism for space environment of the present invention;

[0022] Figure 2 is a cross-sectional view of the locking assembly of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the locking assembly of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the wrench of the present invention;

[0025] Figure 5 The present invention Figure 4 Left view of

[0026] Figure 6 It is a schematic diagram of the structure of the tooth groove on the push rod of the present invention;

[0027] Figure 7 is a schematic diagram of the structure of the drive assembly of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the cooperation between the drive mounting seat and the adjustable wrench of the present invention.

[0029] Reference numerals:

[0030] 1. Movable handle; 2. Fixed handle; 3. Rotating shaft A; 4. Reset torsion spring; 5. Drive assembly; 6. Push rod; 7. Sleeve A; 8. Cover plate; 9. Sleeve B; 10. Locking assembly; 11. Bracket; 12. Spring baffle; 13. Push rod reset spring; 14. Locking mounting seat; 15. Rotating shaft B; 16. Trigger; 17. Locking block; 18. Rotating shaft C; 19. Locking compression spring; 20. Slide groove A; 21. Tooth groove A; 22. Tooth groove B; 23. Drive block; 24. Rotating shaft D; 25. Drive compression spring; 26. Drive mounting seat; 27. Slide groove B. DETAILED DESCRIPTION

[0031] It should be noted that, without any particular exception, the embodiments of the present invention and the features therein may be combined with each other.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0034] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] like Figure 1-Figure 8 As shown, the present invention is a high-reliability reciprocating propulsion mechanism for a space environment, which adopts a detachable ratchet mechanism instead of a friction drive, and designs a driving assembly and a locking assembly similar to a trigger, which cooperate with the tooth grooves to achieve high-reliability driving and locking of the reciprocating propulsion mechanism, and its structure includes the following parts.

[0036] The movable handle 1, which serves as a driving component, is pinned to the fixed handle 2 through the rotating shaft A3, and during the rotation process, it pushes the driving component 5 to rotate around the rotating shaft A3, so that the driving component moves away from one end of the movable handle 1 and moves forward along the forward direction of the push rod 6, thereby realizing the forward movement of the driving component 5 driving the push rod 6.

[0037] The driving assembly 5 includes a driving mounting seat 26, which is mounted on the upper end of the movable handle 1 and the two are fixed, and can be fixed by screws or the like, and is used to install the driving block 23, the rotating shaft D24 and the driving compression spring 25; the driving mounting seat 26 is provided with a slide groove B27, the slide groove B27 is an oblong hole structure, and the slide groove B27 is provided with a rotating shaft D24, and the rotating shaft D24 and the slide groove B27 are clearance-matched, and the rotating shaft D24 acts as a slider to slide in the slide groove B27 along the oblong hole direction of the slide groove B27, and the driving block is fixedly connected to the rotating shaft D24 23, the upper end of the driving block 23 protrudes from the driving mounting seat 26, and the end of the driving block 23 away from the driving mounting seat 26 cooperates with the tooth groove B22 on the push rod 6 to stop the push rod 6; a driving compression spring 25 is provided between the lower end of the driving block 23 and the movable handle 1, and a positioning groove is provided in the area corresponding to the upper end surface of the driving handle 1 and the driving compression spring 25. The lower end of the driving compression spring 25 is arranged in the positioning groove and provides a certain upward thrust to the driving block 23, so that the upper end of the driving block 23 is always in contact with the tooth groove B22 on the push rod 6.

[0038] The fixed handle 2 and the bracket 11 are fixedly connected to form a complete fixed carrier. The bracket 11 mainly realizes the connection and support functions. The fixed handle 2 serves as a carrier of the entire structure and is used for the installation and fixation of other parts. This part is pin-connected to the movable handle 1 through the rotating shaft A3, so that the movable handle 1 can rotate around the fixed handle 2.

[0039] A spring baffle 12 and a push rod reset spring 13 are provided inside the bracket 11. The spring baffle 12 is installed on the push rod 6 and is mainly used to limit the push rod reset spring 13. The push rod reset spring 13 is arranged on the outer ring of the push rod 6 and the two are coaxially arranged and installed between the spring baffle 12 and the bracket 11 to provide elastic force when the push rod 6 is reset.

[0040] The reset torsion spring 4 is installed on the rotating shaft A3 and acts on the movable handle 1 and the fixed handle 2 to provide a reset torque to the space 1.

[0041] It includes a push rod 6, a cover plate 8, a sleeve A7 and a sleeve B9. The sleeve A7 and the sleeve B9 are both installed on the fixed handle 2. The cover plate 8 is arranged at the upper end of the fixed handle 2 to seal the upper end of the fixed handle 2. After the cover plate 8 is opened, it is convenient to install the push rod and the driving component 5. The push rod 6 is a shaft-like part. Under the action of the driving component 5, it can move axially. The push rod 6 is connected to the fixed handle 2 through the sleeve tube A7 and the sleeve B9, so that the forward and backward sliding of the push rod 6 is smoother. At the same time, the lower end surface of the push rod 6 is provided with two specifications of tooth groove structures, namely the tooth groove A21 and the tooth groove B22. The tooth groove A21 cooperates with the end of the locking block 17, and its tooth pitch dimension a is slightly smaller than the tooth pitch dimension b of the tooth groove B, which can realize the forward movement of the push rod 6 in the driving state and the locking in the non-driving state; the tooth groove B22 cooperates with the end of the driving block 23, and the tooth pitch dimension b is slightly larger than the tooth pitch dimension a of the tooth groove A, which can realize the forward movement of the push rod 6 in the driving state.

[0042] The locking assembly 10 is mounted on the bracket 11 and cooperates with the tooth groove structure on the push rod 6 to achieve locking. After unlocking, the push rod 6 moves backward under the action of the push rod return spring 13 and finally returns to the initial position.

[0043] The locking assembly 10 includes a locking mounting seat 14, a trigger 16 and a locking block 17. The locking mounting seat 14 is fixed on the bracket 11. The locking block 17 acts as a slider to move up and down relative to the locking mounting seat 14. The locking block 17 is connected to the trigger 16 through a rotating shaft C18 to form a slider structure. The upper end of the locking block 17 cooperates with the tooth groove A21 on the push rod 6.

[0044] The trigger 16 serves as a driving mechanism of the locking assembly 10, and the lower end of the trigger 16 is arranged to pass downward through the bracket 11. The trigger 16 rotates relative to the bracket 11 through the rotating shaft B15. The rotating shaft B15 is fixed on the bracket 11 as a pin for the rotation of the trigger 16. The trigger 16 is provided with a slide groove A20 to add a degree of freedom to the locking assembly 10. The locking block 17 is fixed with a rotating shaft C18, and the rotating shaft C18 is arranged in the slide groove A20 to form a slide groove structure. During the rotation of the trigger 16, the rotating shaft C18 and the locking block 17 are driven to move downward, and finally the locking assembly 10 is unlocked; a locking compression spring 19 is provided between the lower end of the locking block 17 and the locking mounting seat 14, and the lower end of the locking compression spring 19 sinks into the guide groove on the locking mounting seat 14 and provides a certain thrust to the locking block 17.

[0045] The main process of the reciprocating propulsion device operation is as follows:

[0046] Driving principle: applying driving torque, that is, the operator applies external force, or applies torque with the help of other equipment, so that the movable handle 1 rotates clockwise by a certain angle, and the movable handle 1 drives the driving assembly 5 to rotate around the rotating shaft A3, and makes the end structure of the driving block 23 act on the tooth groove B22 on the push rod 6, and continues to rotate the movable handle 1, while driving the push rod 6 to move forward by the tooth pitch b. At the same time, the tooth groove A21 at the front end of the push rod 6 pushes the locking block 17 to move downward, and after moving the tooth pitch a, the locking block 17 resets, contacts and locks with the next tooth groove. At this point, one drive is completed, the movable handle 1 moves to the extreme position, and presses the reset torsion spring 4 to store energy.

[0047] After the movable handle 1 moves to the extreme position, the driving torque is removed. At this time, the movable handle 1 is reset under the action of the reset torsion spring 4. During this process, the driving block 23 moves downward under the action of the tooth groove B22 on the push rod 6 to achieve the reset of the movable handle 1.

[0048] Unlocking principle: In the locked state, the movable handle 1 is reset, and under the action of the locking compression spring 19, the end of the locking block 17 contacts the tooth groove on the push rod 6 to achieve locking. Press the trigger 16, and under the action of the slide groove A20, the locking compression spring 19 and the locking block 17 move downward, and finally the locking block 17 is disengaged from the tooth groove A21 on the push rod 6, thereby unlocking the push rod 6. Under the action of the push rod reset spring 13, the push rod 6 is reset.

[0049] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A highly reliable reciprocating propulsion mechanism for space environment, characterized by: It includes a movable handle, a fixed handle, a bracket, a push rod, a driving assembly and a locking assembly. The fixed handle and the bracket are fixed as a whole and serve as a carrier for installation. The movable handle and the fixed handle are hinged and provide driving force to the driving assembly. The driving assembly is arranged at the upper end of the movable handle and provides forward power to the push rod. The push rod moves forward and backward relative to the fixed handle, and the locking assembly locks or unlocks the push rod. The driving assembly includes a driving mounting seat, which is mounted on the upper end of the movable handle and the two are fixed. The driving mounting seat is provided with a slide groove B, which is an oblong hole structure. A rotating shaft D is provided in the slide groove B, and the rotating shaft D slides in the slide groove B as a slider. A driving block is fixedly connected to the rotating shaft D, and the upper end of the driving block protrudes from the driving mounting seat. The end of the driving block away from the driving mounting seat cooperates with the tooth groove B on the push rod to achieve the stopping of the push rod. The locking assembly includes a locking mounting seat, a trigger and a locking block. The locking mounting seat is fixed on the bracket. The locking block acts as a slider to move up and down relative to the locking mounting seat. The locking block is connected to the trigger through a rotating shaft to form a slider structure. The upper end of the locking block cooperates with the tooth groove A on the push rod, and the trigger serves as a driving mechanism of the locking assembly.

2. The high-reliability reciprocating propulsion mechanism for space environment according to claim 1, characterized in that: The slide groove B is an oblong hole structure, and the rotating shaft D and the slide groove B are clearance-matched.

3. The high-reliability reciprocating propulsion mechanism for space environment according to claim 1, characterized in that: A driving compression spring is provided between the lower end of the driving block and the movable handle, and a positioning groove is provided in the area on the upper end surface of the driving handle corresponding to the driving compression spring. The lower end of the driving compression spring is arranged in the positioning groove and provides a certain upward thrust to the driving block, so that the upper end of the driving block is always in contact with the tooth groove B on the push rod.

4. The high-reliability reciprocating propulsion mechanism for space environment according to claim 1, characterized in that: The lower end of the trigger passes downward through the bracket, and the trigger rotates relative to the bracket through the rotating shaft B. The rotating shaft B is fixed on the bracket as a pin for the rotation of the trigger 16. A slide groove A is provided on the trigger to add a degree of freedom to the locking assembly. The rotating shaft C is arranged in the slide groove A and forms a slide groove structure. During the rotation of the trigger, the rotating shaft C and the locking block are driven to move downward to unlock the locking assembly.

5. The high-reliability reciprocating propulsion mechanism for space environment according to claim 4, characterized in that: A locking compression spring is arranged between the lower end of the locking block and the locking mounting seat, and the lower end of the locking compression spring sinks into the guide groove on the locking mounting seat and provides a certain thrust to the locking block.

6. The high-reliability reciprocating propulsion mechanism for space environment according to claim 1, characterized in that: A spring baffle and a push rod reset spring are provided inside the bracket. The spring baffle is installed on the push rod and is mainly used to limit the push rod reset spring. The push rod reset spring is arranged on the outer ring of the push rod and the two are coaxially arranged and installed between the spring baffle and the bracket to provide elastic force when the push rod is reset.

7. The high-reliability reciprocating propulsion mechanism for space environment according to claim 1, characterized in that: It also includes a cover plate, a sleeve A and a sleeve B. Both the sleeve A and the sleeve B are installed on the fixed handle. The cover plate is arranged at the upper end of the fixed handle to seal the upper end of the fixed handle.

8. The high-reliability reciprocating propulsion mechanism for space environment according to claim 1, characterized in that: The lower end face of the push rod is provided with two specifications of tooth groove structures, namely tooth groove A and tooth groove B. Tooth groove A cooperates with the end of the locking block, and its tooth pitch dimension a is slightly smaller than the tooth pitch dimension b of tooth groove B, so as to realize the forward movement of the push rod in the driving state and locking in the non-driving state; tooth groove B cooperates with the end of the driving block, and the tooth pitch dimension b is slightly larger than the tooth pitch dimension a of tooth groove A, so as to realize the forward movement of the push rod in the driving state.

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