A tether cutting mechanism

Abstract

The application discloses a tether cutting mechanism, which comprises a support, a microswitch leaf spring, a microswitch support, a trigger lever, an end cover, a woven rope, a microswitch and a cutter. The cutter is in the center of the support, and the end cover, the microswitch support, the trigger lever, the microswitch and other parts are installed on the bottom of the support. The woven rope is pulled to the trigger lever through the holes on the side of the support and the cutter and the end cover. The trigger lever presses the microswitch downward to make it in the trigger state. The application has the advantages of miniaturization, light weight, high reliability and easy result identification.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of space application, and particularly relates to a mechanism for realizing tether cutting. BACKGROUND

[0002] The tether has the advantages of good flexibility and tenacity, and has excellent space use performance. However, for most tether use, the working condition of cutting the tether is necessary. However, how to reliably realize the tether cutting is a big problem for the tether use in space.

[0003] The existing tether cutting technology generally needs manual operation and judgment of the cutting result, and the few automatic tether cutting technologies all have the problems of large tether cutting space and heavy mechanism. SUMMARY

[0004] The technical problem solved by the present application is to overcome the shortcomings of the prior art, and the present application provides a device for realizing tether cutting, which has simple structure and can reliably realize tether cutting.

[0005] The technical scheme of the present application is:

[0006] A tether cutting mechanism, comprising a support, a trigger rod, a micro switch assembly, a cutter and a woven rope.

[0007] The support comprises upper and lower panels, a connecting column between the two panels; the upper panel, the connecting column end face and the lower panel are each provided with a through hole, and the three through holes are coaxial; the connecting column side wall is provided with a through hole for placing the cutter and a through hole for passing the woven rope;

[0008] The cutter has a cutting through hole, which is located in the connecting column end face through hole and coaxial with the connecting column end face through hole;

[0009] The micro switch assembly is installed at the bottom of the lower panel of the support, and whether the tether cutting is completed is judged according to the trigger state of the micro switch assembly;

[0010] The central fulcrum of the trigger rod is fixed on the micro switch assembly through a shaft, one end is provided with a through hole for connecting the woven rope, and the other end can trigger the micro switch assembly when pressed towards the micro switch assembly;

[0011] The woven rope passes through the connecting column side wall through hole of the support, the cutting through hole of the cutter, the lower panel through hole and the trigger rod through hole in sequence, and then returns along the original path and is knotted outside the connecting column to keep a tensioned state; the woven rope pulls one end of the trigger rod, so that the other end of the trigger rod presses the micro switch assembly;

[0012] The tether passes through the upper panel through hole of the support and the cutting through hole of the cutter.

[0013] Preferably, the micro switch assembly comprises a micro switch, a micro switch bracket, a micro switch leaf spring; the micro switch is installed on the micro switch bracket, the micro switch bracket is fixed on the bottom of the support, and the micro switch leaf spring is connected with the micro switch.

[0014] Preferably, the trigger lever presses the micro switch leaf spring in the state of being pulled by the braided rope, and then presses the micro switch; the pressing force of the trigger lever on the micro switch satisfies that the micro switch leaf spring is not damaged and the elastic force of the micro switch leaf spring will pop up the trigger lever after the pulling force of the braided rope on the trigger lever is released.

[0015] Preferably, the end cap is further included and is installed on the bottom of the support; the end cap is provided with a through hole, the braided rope passes through the cutting hole of the cutter, then passes through the through hole of the end cap and the through hole of the trigger lever, the trajectory of the braided rope is limited through the through hole of the end cap to prevent the braided rope from being hooked to cause the micro switch signal error.

[0016] Preferably, a plurality of grooves are arranged on the top surface of the support according to the use requirement; when there is only one tether, the tether is arranged along one groove, passes through the through hole of the upper panel of the support and the upper cutting hole of the cutter, then passes through the through hole of the top surface of the support again and then passes out along another groove; when there are a plurality of tethers, each tether passes through different grooves and then passes through the through hole of the upper panel of the support and the upper cutting hole of the cutter at the same time and is cut at the same time.

[0017] Preferably, the part of the tether passing through the groove of the upper panel of the support is compressed by the single-side aluminum film.

[0018] Preferably, the cutter comprises a detonator, a steel sleeve, a detonator, a shell, a cutter and an anvil; the detonator, the steel sleeve and the detonator are installed in the shell, the cutter and the anvil are installed in the groove of the shell, and the middle part of the groove forms a cutting through hole.

[0019] Preferably, the cutter is powered by a power source to push the cutter to move to cut the tether and the braided rope.

[0020] Preferably, the upper computer is further included, the trigger state of the micro switch assembly is transmitted to the upper computer, and the upper computer displays whether the tether is cut.

[0021] A tether cutting method comprises:

[0022] The braided rope passes through the through hole of the side wall of the support connecting column, the cutting through hole of the cutter and the through hole of the trigger lever in sequence, returns along the original path and is knotted on the outside of the connecting column to keep the state of being pulled tightly; the braided rope pulls one end of the trigger lever to make the other end of the trigger lever press the micro switch leaf spring and the micro switch.

[0023] The tether passes through the through hole of the upper panel of the support and the cutting through hole of the cutter, and then passes through the through hole of the upper panel of the support again.

[0024] After the cutter is triggered, the cutting knife is pushed to cut the tether and the braided rope;

[0025] After the braided rope is cut, the trigger lever is triggered by the force of the micro switch reed, the micro switch is released from the trigger state, and the upper computer displays the information that the tether has been cut.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1) The tether cutting mechanism provided by the present application uses a braided rope to pull a micro switch, and after the braided rope and the tether are cut at the same time, the micro switch trigger state change provides an intuitive signal for whether the tether is cut, making the cutting result clear.

[0028] 2) The tether cutting mechanism provided by the present application uses a cutter to cut the tether, which has high reliability.

[0029] 3) The tether cutting mechanism provided by the present application has a simple structure, small space occupation, light weight, adjustable interface position and support shape, and can adapt to different working occasions. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A tether cutting mechanism provided by the present application is shown in the figure;

[0031] Figure 2 A tether cutting mechanism provided by the present application is shown in the figure;

[0032] Figure 3 A tether cutting mechanism provided by the present application is shown in the figure;

[0033] Figure 4 A tether cutting mechanism provided by the present application is shown in the figure; DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the embodiments of the present application, the following will be further explained and described with specific embodiments as examples combined with the drawings, and the embodiments do not constitute a limitation on the embodiments of the present application.

[0035] The present application provides a space tether cutting mechanism, which comprises a support 1, a micro switch assembly, a trigger lever 4, an end cover 5, a cutter 7, and a braided rope.

[0036] The support 1 is composed of two upper and lower panels and connecting columns between the two panels. The upper and lower panels have a coaxial and equal large through hole. The connecting column has a coaxial and equal large through hole with the upper and lower panels, in addition to which, the connecting column has a through hole for accommodating the cutter 7 and a through hole for passing the braided rope. The part of the tether passing through the top surface groove of the support 1 is compressed by a single-sided aluminum film.

[0037] The cutter 7 is connected with the lower plate by screw, and its cutting part passes through the through hole on the connecting column; the micro switch assembly is installed on the bottom of the support 1 by screw.

[0038] The central supporting point of the trigger lever 4 is fixed on the micro switch assembly by shaft, and one end is provided with a through hole for connecting the woven rope, and the other end is pressed to the micro switch assembly and triggers the micro switch;

[0039] The woven rope passes through the through hole on the connecting column of the support 1, the through hole of the cutter 7, the through hole of the lower plate and the through hole of the trigger lever 4 in sequence, then the one end of the trigger lever 4 is pulled tight, the other end of the trigger lever 4 is pressed to the micro switch assembly, and the woven rope returns to the original position and is knotted outside the connecting column to keep the state of being pulled tight.

[0040] The micro switch assembly comprises a micro switch leaf spring 2, a micro switch bracket 3 and a micro switch 6.

[0041] The structure of the cutter 7 used in the example is shown in Figure 4 The cutter 7 used in the example is shown in

[0042] The implementation provided by the present application is shown in Figure 2 and Figure 3 The passing way of the tether on the tether cutting mechanism is that the tether passes through the groove on the upper surface of the support 1, then passes through the concentric hole of the support 1 and the cutter 7, and then passes out from the cutter 7. The woven rope passes through the holes on the side of the support 1, the cutter 7 and the end cover 5, then pulls the trigger lever 4, and then is knotted to keep the state of being pulled tight after returning to the outside of the bracket 1, and the other end of the trigger lever 4 is pressed to make the micro switch 6 in the triggered state. The tether and the woven rope are cut off together after the cutter 7 works, the trigger lever 4 is bounced up under the force of the micro switch leaf spring 2 after the woven rope is cut off, the micro switch 6 is in the untriggered state, and the information that the tether has been cut off is obtained.

[0043] In the embodiments provided by the present application, the total weight of the device is less than 400g, and the outer envelope size of the device is less than 100mmx90mmx70mm. In addition, since the support does not have the function of cutting the rope, the shape of the support is irrelevant to the realization of the product function. For the support providing an external interface, its shape and mechanical interface can be changed with the change of the working environment. Therefore, the present application can adapt to different working occasions.

[0044] The principle of the present application is that a groove and a concentric hole on the tether support 1 enter into the cutter 7, pass through the cutting mechanism of the cutter 7, and then pass out of the concentric hole and extend from another groove. The braided rope extends from the hole on the side of the support 1, passes through the cutting hole of the cutter 7, the hole of the end cap 5 and the hole of the trigger lever 4 in turn, and then returns, passes out of the hole on the support 1 and is tightened, and is knotted. When it is necessary to cut the tether, the tether is cut by driving the cutter, and at the same time, the braided rope is synchronously cut. The microswitch trigger signal disappears, and the tether cutting is completed.

[0045] Although the present application has been disclosed with the above preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application by using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not depart from the content of the technical solutions of the present application, belongs to the protection scope of the technical solutions of the present application.

[0046] The contents not described in detail in the specification of the present application are the known technology of the person skilled in the art.

Claims

1. A tether cutting mechanism, characterized by, The support, the trigger lever, the micro switch assembly, the cutter and the woven rope; The support comprises upper and lower panels, a connecting column between the two panels, and through holes on the upper panel, the connecting column end face and the lower panel, the three through holes being coaxial; the connecting column side wall is provided with a through hole for placing the cutter and a through hole for allowing the woven rope to pass through; The cutter has a cutting through hole, which is located in the connecting column end face through hole and coaxial with the connecting column end face through hole; The micro switch assembly is installed at the bottom of the lower panel of the support, and the completion of the cutting of the tether is determined according to the triggering state of the micro switch assembly; The central fulcrum of the trigger lever is fixed on the micro switch assembly through a shaft, one end of the trigger lever is provided with a through hole for connecting the woven rope, and the other end of the trigger lever can trigger the micro switch assembly when pressed towards the micro switch assembly; The woven rope passes through the connecting column side wall through hole of the support, the cutting through hole of the cutter, the lower panel through hole and the trigger lever through hole in sequence, returns along the original path, and is knotted on the outer side of the connecting column to keep a tensioned state; the woven rope pulls one end of the trigger lever, and the other end of the trigger lever presses the micro switch assembly. The tether passes through the upper panel through hole of the support and the cutting through hole of the cutter.

2. A tether cutting mechanism according to claim 1, wherein, The micro switch assembly comprises a micro switch, a micro switch bracket and a micro switch leaf spring; the micro switch is installed on the micro switch bracket, the micro switch bracket is fixed on the bottom of the support, and the micro switch leaf spring is connected with the micro switch.

3. A tether cutting mechanism according to claim 2, wherein, The trigger lever presses the micro switch leaf spring in the state of being pulled by the woven rope, and then presses the micro switch; the pressing force of the trigger lever on the micro switch satisfies that the micro switch leaf spring will not be damaged and the elastic force of the micro switch leaf spring will pop up the trigger lever after the tensioning force of the woven rope on the trigger lever is released.

4. A tether cutting mechanism according to claim 1, wherein, The end cap is installed at the bottom of the support; the end cap is provided with a through hole, the woven rope passes through the cutting through hole of the cutter, then passes through the through hole of the end cap and the through hole of the trigger lever, the trajectory of the woven rope is limited through the through hole of the end cap, and the woven rope is prevented from being hooked to cause a false signal of the micro switch.

5. A tether cutting mechanism according to claim 1, wherein, The top surface of the support is provided with a plurality of grooves according to the use requirement; when there is only one tether, the tether is arranged along one groove, passes through the upper panel through hole of the support and the cutting through hole of the cutter, is wound back to pass through the through hole of the top surface of the support, and then is arranged along another groove and is pulled out; when there are a plurality of tethers, each tether passes through different grooves and is cut at the same time.

6. A tether cutting mechanism according to claim 5, wherein, The part of the tether passing through the groove of the upper panel of the support is pressed by the single-sided aluminum film.

7. A tether cutting mechanism according to claim 2, wherein, The cutter comprises a detonator, a steel sleeve, a detonator, a shell, a cutter and an anvil; the detonator, the steel sleeve and the detonator are installed in the shell, the cutter and the anvil are installed in the groove of the shell, and the middle part of the groove forms a cutting through hole.

8. A tether cutting mechanism according to claim 7, wherein, The cutter is driven by a power source to move the cutter to cut the tether and the woven rope.

9. A tether cutting mechanism according to claim 7, wherein, The upper computer is further provided, the triggering state of the micro switch assembly is transmitted to the upper computer, and the upper computer displays whether the cutting of the tether is completed.

10. A tether cutting method using a tether cutting mechanism as claimed in claim 9, characterized by, The support, the trigger lever, the micro switch assembly, the cutter and the woven rope; The braided rope passes through the side wall through hole of the support connecting column, the cutting through hole of the cutter, the trigger lever through hole in turn, and then returns to the connecting column outside to be knotted to keep a tension state; the braided rope pulls one end of the trigger lever, and the other end of the trigger lever presses the micro switch leaf spring and the micro switch; The tether passes through the upper panel through hole of the support, the cutting through hole of the cutter, and then passes through the upper panel through hole of the support again; After the cutter is detonated, the cutting knife is pushed to cut the tether and the braided rope; After the braided rope is cut, the trigger lever is popped up under the action of the force of the micro switch leaf spring, the micro switch is out of the trigger state, and the upper computer displays information that the tether has been cut.

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