CN114750105A - Pin puller based on memory alloy - Google Patents
Pin puller based on memory alloy Download PDFInfo
- Publication number
- CN114750105A CN114750105A CN202210563386.1A CN202210563386A CN114750105A CN 114750105 A CN114750105 A CN 114750105A CN 202210563386 A CN202210563386 A CN 202210563386A CN 114750105 A CN114750105 A CN 114750105A
- Authority
- CN
- China
- Prior art keywords
- limiting ball
- contact surface
- pin
- opening
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
Abstract
The invention discloses a pin puller based on memory alloy, relates to the technical field of pin pulling equipment, and aims to solve the problem that the pin puller in the field of the existing space satellite has small pin pulling acting force. The invention comprises a shell, a pin pulling pipe, a base body assembly, a trigger disc, a driving elastic piece, a recovery elastic piece and a trigger element. The pin pulling pipe is connected with the shell, and a first clamping groove is formed in the inner side of the pin pulling pipe; a through hole penetrating through the inner cavity of the base body assembly is formed in the side wall of the base body assembly, and a limiting ball capable of sliding or rolling along the depth direction of the through hole is arranged in the through hole; the inner side wall of the trigger disc is provided with a second clamping groove, the limiting ball can limit the movement of the pin pulling pipe relative to the base body component when being accommodated in the first clamping groove, and the limiting ball can limit the movement of the trigger disc relative to the base body component when being accommodated in the second clamping groove; the first clamping groove is internally provided with a second contact surface which can be contacted with the limiting ball, and the second clamping groove is internally provided with a third contact surface which can be contacted with the limiting ball. The invention is suitable for the pin puller.
Description
Technical Field
The invention relates to the technical field of pin pulling equipment, in particular to a pin puller based on memory alloy.
Background
Pin extractors, which are generally mounted on the end of a lever and are used to extract cotter pins in fittings or hardware, are commonly used in safeties for electromechanical systems and weapon systems. The pin puller mainly comprises an electromagnetic driving mode and a gunpowder driving mode for driving. The electromagnetically-driven pin puller generally has the problems of complex structure, high price, low electro-mechanical energy conversion efficiency, easy demagnetization after long-term placement, easy burning of a coil assembly after long-term work and the like; the powder-driven pin puller generally has the problems of low reliability, low electro-mechanical energy conversion efficiency, no repeated use of the powder-driven pin puller, low utilization rate and the like.
As aircraft technology develops, the tasks undertaken by the aircraft tend to be diversified and complicated, the aircraft often needs to release special payloads, and in the process, how to reliably separate the payloads from the aircraft is the key of the technology. In the existing aerospace and satellite fields, the aircraft separation usually adopts a gunpowder-driven pin puller, and in the action process, the impact load generated by gunpowder driving is large, so that the aircraft can be frequently damaged; meanwhile, the gunpowder-driven pin puller belongs to a disposable product, and the whole separating mechanism is often scrapped after the pin puller is used, so that resource waste is caused.
With the continuous progress of the technology, the invention patent with the application number of CN201610607315.1 and the invention patent with the application number of CN201920208021.0 both use memory alloy in the pin puller to solve some problems caused by the electromagnetic or gunpowder driving method. The memory alloy is a novel intelligent material, has the characteristic of shape memory, is forcibly deformed at the temperature lower than a specific phase transition temperature, and can recover the original shape when heated and heated to exceed the phase transition temperature. When the memory alloy is used as an actuating element, the memory alloy wire is generally used in two using modes, namely, the memory alloy wire is made into a spiral spring and is deformed by direct energization or heating in hot water, hot air and other modes, and the using method has the characteristics of simple heating, large stroke and small actuating force, and generally does not exceed a few newtons; the memory alloy wire is directly stretched and is heated by direct electrification or hot water, hot air and the like to be contracted. The application method is characterized by simple heating and larger actuating force than a spiral spring, but the actuating force is generally not more than dozens of newtons and the stroke is smaller because the memory alloy wire is thinner.
For example, the invention patent with application number CN201610607315.1 discloses a pin puller based on a memory alloy wire, which includes a pin, a housing, a pull rod, a top spring, a front insulating pad, a pull disc, a memory alloy wire, a PCB, a rear cover, a power supply wire, etc., and the pin puller increases the effective length of the alloy wire by a method of multiple shuttling back and forth, thereby increasing the resistance of the alloy wire, realizing rapid heating, and reducing the actuation time, but still does not change the disadvantages of small actuation force (generally not exceeding tens of newtons) and small stroke.
Disclosure of Invention
The invention aims to: the invention at least solves the problem of small pin pulling force of the pin puller in the background technology, and provides the pin puller based on the memory alloy.
The technical scheme of the invention is as follows:
a pin puller based on memory alloy comprises a shell and a pin pulling pipe, wherein a first opening is formed in one end of the shell, the pin pulling pipe is arranged in the shell and can slide along the length direction of an inner cavity of the shell, and one end of the pin pulling pipe can penetrate through the first opening; the pin pulling pipe is connected with the shell through the driving elastic piece, the elastic action direction of the driving elastic piece is consistent with the length direction of the inner cavity of the shell, and a first clamping groove is formed in the inner side of the pin pulling pipe. A base body assembly and a triggering disc are concentrically arranged in the pin pulling pipe, the base body assembly is detachably connected with the shell, a through hole penetrating through the inner cavity of the base body assembly is formed in the side wall of the base body assembly, and a limiting ball capable of moving along the depth direction of the through hole is arranged in the through hole; trigger the dish and be equipped with second joint groove on its inside wall, the size of spacing ball with first joint groove with the equal mutual matching of size in second joint groove, spacing ball part holds and to restrict the taper pipe and take place the motion for base member subassembly under the circumstances in first joint groove, spacing ball part holds and to restrict under the circumstances in second joint groove and to trigger the dish and take place the motion for base member subassembly. A second contact surface which can be contacted with the limiting ball is arranged on one side, close to the first opening, of the first clamping groove, and an included angle alpha exists between a straight line where a contact point between the second contact surface and the limiting ball and a ball center of the limiting ball are located and an axial lead which passes through the ball center of the limiting ball and is parallel to the axis of the shell, wherein alpha is larger than 0 degree and smaller than 90 degrees; a third contact surface which can be contacted with the limiting ball is arranged on one side of the second clamping groove, which is far away from the first opening, and an included angle beta exists between a straight line where a contact point between the third contact surface and the limiting ball and a ball center of the limiting ball are located and an axial lead which passes through the ball center of the limiting ball and is parallel to the axis of the shell, wherein beta is larger than 0 degree and smaller than 90 degrees; the trigger disc is connected with the shell through a recovery elastic part, and the elastic action direction of the recovery elastic part is consistent with the length direction of the inner cavity of the shell; and a trigger element is also connected between the trigger disc and the shell, and the acting force direction of the trigger element is opposite to the elastic force direction of the elastic recovery piece.
Further, the included angle alpha and/or the included angle beta is/are in the range of 30-60 degrees.
Further, the angle of the included angle α and/or the included angle β is 45 °.
Further, the diameter of limiting ball is greater than the depth of via hole. A first contact surface connected with the second contact surface is further arranged on one side, far away from the first opening, of the first clamping groove, a contact point between the limiting ball and the first contact surface is a first farthest end of the limiting ball moving along the depth direction of the via hole, and the diameter of the limiting ball is smaller than or equal to the sum of the distance from the contact point between the limiting ball and the first contact surface to an opening plane at one end, close to the first contact surface, of the via hole and the depth of the via hole; and/or a fourth contact surface connected with the third contact surface is further arranged on one side, close to the first opening, of the second clamping groove, and the contact point between the limiting ball and the fourth contact surface is the second farthest end, moving along the depth direction of the via hole, of the limiting ball
The diameter of the limiting ball is smaller than or equal to the sum of the distance from a contact point between the limiting ball and the fourth contact surface to an opening plane at one end of the via hole close to the fourth contact surface and the depth of the via hole.
Further, the diameter of the limiting ball is equal to the sum of the distance from a contact point between the limiting ball and the first contact surface to an opening plane at one end of the via hole close to the first contact surface and the depth of the via hole. And/or the diameter of the limiting ball is equal to the sum of the distance from a contact point between the limiting ball and the fourth contact surface to an opening plane at one end of the via hole close to the fourth contact surface and the depth of the via hole.
Further, the depth of the via hole is larger than or equal to the distance from a contact point between the limiting ball and the first contact surface to an opening plane at one end of the via hole close to the first contact surface. And/or the depth of the via hole is greater than or equal to the distance from a contact point between the limiting ball and the fourth contact surface to an opening plane at one end of the via hole close to the fourth contact surface.
Furthermore, a first round table is arranged at one end, far away from the first opening, of the shell, and a second round table is arranged on the outer side of one end, far away from the first opening, of the base body assembly; the first round platform and the second round platform are provided with first mounting holes at corresponding positions, and the first round platform and the second round platform are connected through bolts inserted into the first mounting holes.
Further, the base assembly is provided with a second opening at one end, away from the first opening, of the base assembly, the pin puller further comprises a blocking cover used for sealing the second opening, second mounting holes are formed in positions, corresponding to the second round table, of the blocking cover, and the second round table is connected with the blocking cover through bolts inserted into the second mounting holes.
Furthermore, the trigger element comprises a memory alloy, two ends of the memory alloy are respectively connected with the blocking cover and the trigger disc, and the length direction of the memory alloy is consistent with the axial direction of the shell.
Further, the base body assembly comprises a base body located at one end close to the first opening and a base body seat in threaded connection with the base body, and the second circular table is located on the base body seat.
The invention has the following beneficial effects:
the first clamping groove and the second clamping groove are used for accommodating the limiting ball before and after triggering respectively, and meanwhile, the second contact surface on the first clamping groove and the third contact surface on the second clamping groove can be matched with the driving elastic piece and the restoring elastic piece respectively to form pushing on the limiting ball, so that triggering of a pin pulling effect and resetting of the pin puller are facilitated. The invention can also flexibly set the rigidity of the driving elastic part and the stroke distance of the pin pulling pipe, and can achieve the action effect of larger pin pulling force and stroke through small release force and displacement, thereby improving the pin pulling effect and ensuring the integral use to be reliable. In addition, the pin puller can be repeatedly used, and is beneficial to environmental protection and resource saving. The pin puller is suitable for pin pullers in the fields of spaceflight and satellites.
Drawings
FIG. 1 is a schematic block diagram of some embodiments of the present invention;
FIG. 2 is an enlarged schematic view of A in FIG. 1;
FIG. 3 is a schematic block diagram of yet another embodiment of the present invention;
fig. 4 is an enlarged structural diagram of B in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, cannot be construed as limiting the present invention.
In the related art, the memory alloy is forcibly deformed below a specific transformation temperature, and the memory alloy can recover its original shape when heated to a temperature higher than the transformation temperature, and thus is increasingly used in pin extractors. However, the memory alloy usually has the characteristics of small action force and short stroke in the process of recovering the original shape, so that the problem that stable and effective pin pulling acting force is difficult to provide for the pin puller, and pin pulling failure is easily caused is solved.
Based on this, as shown in fig. 1 and fig. 3, some embodiments of the present invention provide a pin puller based on memory alloy, the pin puller includes a housing 1, the housing 1 may be a hollow cylindrical structure, and a hollow portion of the housing 1 may be used to accommodate a trigger structure of the pin puller, so as to achieve a final pin pulling effect; the middle part of one end of the shell 1 is provided with a first opening, and the cross section of the first opening can be circular; the other end of the shell 1 is provided with a third opening, the size of the third opening is larger than that of the first opening, and the third opening can also be circular. The periphery of the end of the shell 1 provided with the third opening is also provided with a first round table.
With continued reference to fig. 1 and 3, the pin remover further includes a pin removing tube 2, the pin removing tube 2 is disposed in the inner cavity of the housing 1 and can slide along the length direction of the inner cavity of the housing 1, and the pin removing tube 2 can include a first pin removing portion 21, a second pin removing portion 22 and a third pin removing portion 23, which are all hollow and cylindrical in three sections. The diameters of the first pin removing part 21, the second pin removing part 22 and the third pin removing part 23 are increased in sequence. The first pull pin portion 21, the second pull pin portion 22 and the third pull pin portion 23 may be integrally formed or assembled, and embodiments of the present invention are not limited thereto. The outer diameter of the first pin pulling part 21 is matched with the diameter of a first opening of the shell 1, the first pin pulling part 21 can slide in the first opening, one end, far away from the second pin pulling part 22, of the first pin pulling part 21 is used for being connected with an object to be pulled, the first pin pulling part 21 is retracted and contained in the shell 1, the pin pulling effect of the object to be pulled can be achieved, and the object can be pulled out. The pin pulling stroke of the pin pulling pipe 2 can be flexibly set by setting the length of the first pin pulling part 21. A first step is formed between the second pull pin part 22 and the third pull pin part 23, and the driving elastic part 7 is sleeved outside the second pull pin part 22. Illustratively, the driving elastic member 7 may be a driving spring, and both ends of the driving spring are respectively connected to the end of the housing 1 having the first opening and the first step, so that the elastic force of the driving spring acts in the same direction as the length direction of the inner cavity of the housing 1. In addition, the drive spring may have a greater stiffness and displacement, resulting in a greater pin-pull force and displacement. The third pull pin portion 23 is provided with a first engaging groove 231 on an inner side of an end thereof away from the second pull pin portion 22.
As shown in figures 1 and 3, the inner cavity of the third pull pin portion 23 is concentrically provided with a base assembly and a trigger plate 4. The base body component comprises a base body 3 which is in a hollow cylindrical structure, the outer diameter of the base body 3 is matched with the inner cavity of the third pin pulling part 23, and the base body 3 can slide along the length direction of the third pin pulling part 23. The base body 3 is further provided with at least one through hole 31 penetrating through the side wall of the base body 3 and communicated with the inner cavity of the base body, each through hole 31 is internally provided with a limiting ball 8, and the number of the through holes 31 and the number of the limiting balls 8 are matched with the first clamping grooves 231 of the third pulling pin parts 23.
In some examples, as shown in fig. 1, two through holes 31 may be provided, and the two through holes 31 are respectively located on two sides of the base 3, so that the stability of the operation of the pin remover may be improved on the basis of the simplicity of the overall components of the pin remover.
As shown in FIG. 2, the diameter D of the limiting ball 8 is matched with the diameter D of the through hole 31, and the limiting ball 8 can move (e.g., slide or roll) in the through hole 31 along the depth direction of the through hole 31. It is understood that the diameter D of the limiting ball 8 is matched with the diameter D of the through hole 31, which means that the diameter D of the limiting ball 8 is slightly smaller than the diameter D of the through hole 31. In this case, the limiting ball 8 can be always in contact with the via hole 31 during the movement of the via hole 31, i.e. the limiting ball 8 does not jump during the movement of the via hole 31.
With continued reference to fig. 2, the first clamping groove 231 includes a first contact surface 2311 and a second contact surface 2312 which are located on the inner side wall of the second pull pin portion 22 and connected with each other; the second contact surface 2312 is connected to the inner side surface of the third pull pin portion 23. The first contact surface 2311 can be connected with one end surface of the third pin pulling part 23 far away from the second pin pulling part 22, namely, the first clamping groove 231 is arranged at one end of the first clamping groove 231 far away from the second pin pulling part 22 in an opening way. An open accommodating cavity (namely, an accommodating cavity of the first clamping groove 231) is formed between the first contact surface 2311 and the second contact surface 2312, and when the limiting ball 8 is partially positioned in the first clamping groove 231, the limiting ball 8 can limit the relative movement between the base body 3 and the pin pulling pipe 2.
In some examples, as shown in fig. 2, the stop ball 8 contacts both the first and second contact surfaces 2311 and 2312, respectively. The first contact surface 2311 and the second contact surface 2312 are both smooth surfaces, which facilitates movement of the spacing ball 8 during spacing release. Illustratively, the first contact surface 2311 is parallel to the outer surface of the third pulling pin portion 23, when the limiting ball 8 is in contact with the first contact surface 2311, a contact point N1 between the limiting ball 8 and the first contact surface 2311 is a first farthest end of the limiting ball 8 moving along the depth direction of the via hole 31, and at this time, the limiting ball 8 does not move further toward the pulling pin tube 2. The diameter D of the limiting ball 8 is greater than the depth L of the via hole 31, and the diameter D of the limiting ball 8 is less than or equal to the sum of the distance T1 from a contact point N1 between the limiting ball 8 and the first contact surface 2311 to an opening plane at one end of the via hole 31 close to the first contact surface 2311 and the depth L of the via hole. For example, the diameter D of the limiting ball 8 is equal to the sum of the distance T1 from the contact point N1 between the limiting ball 8 and the first contact surface 2311 to the opening plane of the via 31 at the end close to the first contact surface 2311 and the via depth L. With the arrangement, when the limiting ball 8 is accommodated in the space of the first clamping groove 231 and the via hole 31, the sliding of the trigger plate 4 is not affected.
In some examples, the depth L of the via 31 is greater than or equal to the distance T1 from the contact point N1 between the position-limiting ball 8 and the first contact surface 2311 to the aperture plane at the end of the via 31 near the first contact surface 2311. Set up like this, when spacing ball 8 joint in first joint groove 231, spacing ball 8 gives the effort of the via hole 31 inside wall of base member 3 on the axial lead direction through the centre of sphere 0 of spacing ball 8 and be on a parallel with the 1 axis of casing to can make the use of pulling pin ware whole stability under the condition of only guaranteeing base member 3 rigidity.
For the second contact surface 2312, as shown in fig. 2, the second contact surface 2312 is arranged in the first clamping groove 231 and close to one side of the first opening, an included angle α exists between a straight line where a contact point M1 between the second contact surface 2312 and the limiting ball 8 is located and a ball center O of the limiting ball 8 and an axial line which passes through a ball center 0 of the limiting ball 8 and is parallel to the axis of the housing 1, and α is greater than 0 ° and less than 90 °. So configured, when the pin extractor 2 and the base body 3 move relatively, the second contact surface 2312 applies a force F to the limit ball 8, which is directed to the spherical center O of the limit ball 8 by the contact point M1, so as to push the limit ball 8 to move away from the pin extractor 2.
In some embodiments, 30 ≦ α ≦ 60, which may allow for a greater component of force F in a direction perpendicular to the axis line to facilitate driving movement of the stop ball 8 when the second contact surface 2312 imparts force F to the stop ball 8 with contact point M1 pointing toward the center O of the stop ball 8. Illustratively, the angle of α may be 30 °, 40 °, 50 °, 60 °, etc. In some examples, the angle α may be 45 °, so that the first catching groove 231 can be easily machined, and the second contact surface 2312 can ensure that the component of the limiting ball 8 in the direction perpendicular to the axis is larger.
In some examples, the limiting ball 8 may be made of steel, so that the limiting ball 8 is prevented from being deformed due to extrusion, and the overall stability and the service life are improved.
As shown in FIGS. 1 and 3, the base body 3 can be closed at the end close to the second pull pin portion 22, and the base body 3 is further screwed with the base body base 5 at the end far from the second pull pin portion 22. Through the threaded connection between the base seat 5 and the base body 3, the gap length between the base seat 5 and the base body 3 can be adjusted, and the elastic force of the recovery elastic piece 9 between the base seat 5 and the base body 3 can be adjusted. The base body seat 5 comprises a hollow connecting part in threaded connection with an inner cavity at one end of the base body 3, and a second circular table is arranged at one end, far away from the second pin pulling part 22, of the hollow connecting part. The second round platform and the first round platform are provided with first mounting holes which penetrate through each other at corresponding positions, and the second round platform and the first round platform can be fixed by expansion bolts or other fasteners. For example, the first mounting holes are provided with internal threads having the same spiral direction, and the first bolt 100 is screwed into the two first mounting holes to fix the second circular truncated cone to the first circular truncated cone. For example, the second circular truncated cone may be fixed to the first circular truncated cone by engaging a bolt inserted through the first mounting hole with a nut. With such an arrangement, the detachable fixation between the base body 3 and the housing 1 can be flexibly achieved.
With continued reference to fig. 1 and 3, the second circular table of the base 5 may further be provided with a detachable cover 6 on a side thereof away from the hollow connecting portion, the cover 6 and the second circular table are provided with second mounting holes penetrating through each other at corresponding positions, and the second circular table and the cover 6 may be fixed by using expansion bolts or other fasteners. Illustratively, the second mounting holes are all provided with internal threads with consistent spiral directions, and the second round table and the blocking cover 6 can be fixed by screwing the second bolt 200 into the second mounting holes. After the blocking cover 6 is installed on the second circular table of the base seat 5, the hollow inner cavity of the base seat 5 can be closed.
With continued reference to fig. 1 and 3, the trigger plate 4 is a hollow cylindrical structure, the outer diameter of the trigger plate 4 is smaller than the inner diameter of the base body 3, and the trigger plate 4 can slide along the length direction of the base body 3. One end of the trigger disc 4, which is close to the pin pulling pipe 2, is arranged in a closed manner, and one end of the trigger disc 4, which is far away from the pin pulling pipe 2, is provided with an opening communicated with a hollow inner cavity of the trigger disc 4. The outside that triggers dish 4 is close to its closed one end is equipped with the second joint groove 411 corresponding with above-mentioned via hole 31, and the quantity and the position etc. of second joint groove 411 keep unanimous with via hole 31 to make spacing ball 8 in the via hole 31 can block into in the second joint groove 411 that corresponds one by one.
As shown in fig. 4, the second clip groove 411 may include a third contact surface 4111, a fourth contact surface 4112, and a fifth surface 4113 connected in sequence. The third contact surface 4111, the fourth contact surface 4112, and the fifth surface 4113 are sequentially connected to form an open accommodating cavity (i.e., an accommodating cavity of the second snap groove 411) capable of accommodating a part of the limiting ball 8, and when the limiting ball 8 is partially located in the second snap groove 411, the limiting ball 8 can limit the substrate 3 and the trigger plate 4 from moving relatively.
In some examples, as shown in fig. 4, the third contact surface 4111, the fourth contact surface 4112, and the fifth surface 4113 are smooth surfaces, which facilitates movement of the spacing ball 8 during spacing release. Illustratively, the fourth contact surface 4112 is disposed in parallel with the outer sidewall surface of the trigger disk 4, that is, when the limiting ball 8 contacts the fourth contact surface 4112, the contact point N2 between the limiting ball 8 and the fourth contact surface 4112 is located at the second farthest end of the limiting ball 8 from the direction of the via hole 31, and at this time, the limiting ball 8 does not move further toward the trigger disk 4. The diameter D of the limiting ball 8 is smaller than or equal to the sum of the distance T2 from the contact point N2 between the limiting ball 8 and the fourth contact surface 4112 to the opening plane of the end of the via 31 close to the fourth contact surface 4112 and the depth L of the via. For example, the diameter D of the limiting ball 8 is equal to the sum of the distance T2 from the contact point N2 between the limiting ball 8 and the fourth contact surface 4112 to the opening plane of the via 31 at the end close to the fourth contact surface 4112 and the via depth L. When the limiting ball 8 is accommodated in the space of the second clamping groove 411 and the through hole 31, the sliding of the pin pulling pipe 2 is not affected.
In some examples, the depth L of the via 31 is greater than or equal to the distance T2 from the contact point N2 between the limiting ball 8 and the fourth contact surface 4112 to the aperture plane at the end of the via 31 near the fourth contact surface 4112. Set up like this, when spacing ball 8 joint in second joint groove 411, spacing ball 8 gives the effort of the via hole 31 inside wall of base member 3 on the axial lead direction through the centre of sphere 0 of spacing ball 8 and be on a parallel with the 1 axis of casing to can make the use of pulling pin ware whole stability under the condition of only guaranteeing base member 3 rigidity.
For the third contact surface 4111, as shown in fig. 4, the third contact surface 4111 is disposed in the second engaging groove 411 and away from the first opening, an included angle β exists between a straight line where a contact point M2 between the third contact surface 4111 and the limiting ball 8 is located and a spherical center O of the limiting ball 8 and an axial line passing through the spherical center O of the limiting ball and being parallel to the axis of the housing 1, where β is greater than 0 ° and less than 90 °. Thus, when the trigger plate 4 and the base 3 move relatively, the third contact surface 4111 applies a force F to the limiting ball 8, which is directed to the center O of the limiting ball 8 by the contact point M2, so as to push the limiting ball 8 away from the trigger plate 4.
In some embodiments, 30 ≦ β ≦ 60, which may further allow for a greater component of force F in a direction perpendicular to the axis when third contact surface 4111 imparts force F to limiting ball 8 with contact point M2 pointing toward the center O of limiting ball 8, thereby facilitating driving movement of limiting ball 8. Illustratively, the angle of β may be 30 °, 40 °, 50 °, 60 °, etc. In some examples, the angle β may be 45 °, so that the second engaging groove 411 can be easily machined, and it is ensured that the third contact surface 4111 gives the limiting ball 8 a large component in the direction perpendicular to the axis.
As shown in fig. 1 and 3, the trigger plate 4 is further connected with an abutting portion 42 at one end thereof having an opening, in some embodiments, the abutting portion 42 may be disposed outside the base body 3, an outer wall of the base body 3 may be provided with a sliding slot in an axial direction thereof, and the abutting portion 42 may slide in the sliding slot. The abutting portion 42 is connected to the shield cover 6 by the restoring elastic member 9. Illustratively, the restoring elastic member 9 is a restoring spring, the restoring spring is sleeved outside the base body 3, and two ends of the restoring spring are respectively connected to the abutting portion 42 and the blocking cover 6. In other embodiments, the abutting portion 42 can be disposed in the hollow cavity of the base 3, and the specific location and connection relationship thereof are not described herein.
With continued reference to fig. 1 and 3, the pin remover further comprises a trigger element 10 disposed between the blocking cover 6 and the trigger plate 4, and both ends of the trigger element 10 are respectively connected to the blocking cover 6 and the trigger plate 4.
In some examples, the triggering element 10 may be a memory alloy, one end of which is connected to the cover body of the base body 3, one end of which is closed, and the other end of which is connected to the blocking cover 6. The position of the memory alloy can be set at the axial position of the substrate 3, so that the influence of the inner side wall of the substrate 3 on the deformation of the memory alloy can be reduced.
The cover 6 may also be provided with a power line and a power source (not shown) for energizing the memory alloy, and the memory alloy can be contracted by energizing and heating the memory alloy by the power source. The embodiment of the present invention is not particularly limited with respect to the manner in which the memory alloy is heated.
It should be noted that the triggering element 10 may also be other components that can deform under certain conditions, and the invention is not limited thereto.
In a specific operation, as shown in fig. 1 and 3, fig. 1 may illustrate the structure of the pin remover of the present invention before the pin remover is triggered in some embodiments, and fig. 3 may illustrate the structure of the pin remover of the present invention after the pin remover is triggered in some embodiments. Before the pin puller is triggered, the limiting ball 8 is clamped in the first clamping groove 231 (as shown in fig. 1), when the memory alloy is electrified, the memory alloy generates heat, when the temperature exceeds the phase transition temperature of the memory alloy, the memory alloy wire contracts, so that the trigger plate 4 is pulled to move downwards together, when the position of the second clamping groove 411 on the trigger plate 4 is below the centroid (generally, the center of the ball) of the limiting ball 8, a certain acting force exists on the pin pulling tube 2 due to the driving elastic piece 7 (driving spring), and the second contact surface 2312 of the pin pulling tube 2 gives an acting force F to the limiting ball 8, wherein the acting force F can push the limiting ball 8 into the second clamping groove 411 (as shown in fig. 3), and the point M1 points to the center of the limiting ball 8. At this time, the driving elastic member 7 releases the compression energy and pushes the pin pulling tube 2 away from the first opening of the housing 1, thereby completing the pin pulling operation.
When the pin puller needs to be reassembled, the blocking cover 6 is opened, and the memory alloy in the initial state is connected between the trigger disc 4 and the blocking cover 6. When the elastic component 9 (the recovery spring) is compressed and recovered, the pin pulling pipe 2 is pulled outwards through one end of the first pin pulling part 21, so that the driving elastic component 7 (the driving spring) is compressed, when the first clamping groove 231 of the pin pulling pipe 2 is pulled to the position of the ball center O of the limiting ball 8, the recovery elastic component 9 pushes the contact service panel 4 to move towards the first opening direction of the shell 1, and simultaneously pushes the limiting ball 8 to enter the first clamping groove 231, so that the state before triggering is recovered.
The present invention is not limited to the above-mentioned alternative embodiments, and any other various products can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, all of which fall within the scope of the present invention, fall within the protection scope of the present invention.
Claims (10)
1. A pin puller based on memory alloy is characterized in that: the pin pulling device comprises a shell and a pin pulling pipe, wherein a first opening is formed in one end of the shell, the pin pulling pipe is arranged in the shell and can slide along the length direction of an inner cavity of the shell, and one end of the pin pulling pipe can penetrate through the first opening; the pin pulling pipe is connected with the shell through a driving elastic part, the elastic action direction of the driving elastic part is consistent with the length direction of the inner cavity of the shell, and a first clamping groove is formed in the inner side of the pin pulling pipe; a base body assembly and a trigger disc are concentrically arranged in the pin pulling pipe, the base body assembly is detachably connected with the shell, a through hole penetrating through an inner cavity of the base body assembly is formed in the side wall of the base body assembly, and a limiting ball capable of moving along the depth direction of the through hole is arranged in the through hole; the triggering disc is provided with a second clamping groove on the inner side wall, the size of the limiting ball is matched with the size of the first clamping groove and the size of the second clamping groove, and the pin pulling pipe can be limited to move relative to the base body assembly under the condition that the limiting ball is partially accommodated in the first clamping groove; the limiting ball part can limit the trigger disc to move relative to the base body component under the condition that the limiting ball part is accommodated in the second clamping groove; a second contact surface which can be contacted with the limiting ball is arranged on one side, close to the first opening, of the first clamping groove, and an included angle alpha exists between a straight line where a contact point between the second contact surface and the limiting ball and a ball center of the limiting ball are located and an axial lead which passes through the ball center of the limiting ball and is parallel to the axis of the shell, wherein alpha is larger than 0 degree and smaller than 90 degrees; a third contact surface which can be contacted with the limiting ball is arranged on one side of the second clamping groove, which is far away from the first opening, and an included angle beta exists between a straight line where a contact point between the third contact surface and the limiting ball and a ball center of the limiting ball are located and an axial lead which passes through the ball center of the limiting ball and is parallel to the axis of the shell, wherein beta is larger than 0 degree and smaller than 90 degrees; the trigger disc is connected with the shell through a recovery elastic part, and the elastic action direction of the recovery elastic part is consistent with the length direction of the inner cavity of the shell; and a trigger element is also connected between the trigger disc and the shell, and the acting force direction of the trigger element is opposite to the elastic force direction of the elastic recovery piece.
2. A memory alloy based pin puller according to claim 1, wherein the angle α and/or the angle β is in the range of 30 ° -60 °.
3. A pin puller as in claim 2 in which the angle α and/or angle β is 45 °.
4. The pin puller based on the memory alloy as recited in any one of claims 1 to 3, wherein the diameter of the limiting ball is larger than the depth of the through hole;
a first contact surface connected with the second contact surface is further arranged on one side, far away from the first opening, of the first clamping groove, a contact point between the limiting ball and the first contact surface is a first farthest end of the limiting ball moving along the depth direction of the via hole, and the diameter of the limiting ball is smaller than or equal to the sum of the distance from the contact point between the limiting ball and the first contact surface to an opening plane at one end, close to the first contact surface, of the via hole and the depth of the via hole; and/or the like, and/or,
a fourth contact surface connected with the third contact surface is further arranged on one side, close to the first opening, of the second clamping groove, a contact point between the limiting ball and the fourth contact surface is a second farthest end, moving along the depth direction of the via hole, of the limiting ball,
the diameter of the limiting ball is smaller than or equal to the sum of the distance from a contact point between the limiting ball and the fourth contact surface to an opening plane at one end of the via hole close to the fourth contact surface and the depth of the via hole.
5. The pin puller based on the memory alloy as recited in claim 4, wherein the diameter of the limiting ball is equal to the sum of the distance from the contact point between the limiting ball and the first contact surface to the opening plane of the via hole at the end close to the first contact surface and the depth of the via hole; and/or the diameter of the limiting ball is equal to the sum of the distance from a contact point between the limiting ball and the fourth contact surface to an opening plane at one end of the via hole close to the fourth contact surface and the depth of the via hole.
6. The pin puller based on the memory alloy as recited in claim 4, wherein the depth of the through hole is greater than or equal to the distance from the contact point between the limiting ball and the first contact surface to the opening plane at one end of the through hole close to the first contact surface; and/or the like, and/or,
the depth of the via hole is larger than or equal to the distance from a contact point between the limiting ball and the fourth contact surface to an opening plane at one end of the via hole close to the fourth contact surface.
7. The memory alloy-based pin puller according to any one of claims 1-3, wherein the shell is provided with a first circular truncated cone at one end away from the first opening, and the base assembly is provided with a second circular truncated cone at the outer side of one end away from the first opening; the first round platform and the second round platform are provided with first mounting holes at corresponding positions, and the first round platform and the second round platform are connected through bolts inserted into the first mounting holes.
8. The pin puller based on the memory alloy, according to claim 7, wherein a second opening is formed in one end, away from the first opening, of the base assembly, the pin puller further comprises a blocking cover for closing the second opening, second mounting holes are formed in positions, corresponding to the second round table, of the blocking cover, and the second round table is connected with the blocking cover through bolts inserted into the second mounting holes.
9. The pin puller based on the memory alloy as claimed in claim 8, wherein the trigger element comprises the memory alloy, two ends of the memory alloy are respectively connected with the blocking cover and the trigger disc, and the length direction of the memory alloy is consistent with the axial direction of the shell.
10. The memory alloy-based pin puller of claim 8, wherein said base assembly comprises a base located proximate to one end of said first opening and a base mount in threaded engagement with said base, said second circular table being located on said base mount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210563386.1A CN114750105A (en) | 2022-05-23 | 2022-05-23 | Pin puller based on memory alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210563386.1A CN114750105A (en) | 2022-05-23 | 2022-05-23 | Pin puller based on memory alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114750105A true CN114750105A (en) | 2022-07-15 |
Family
ID=82334536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210563386.1A Pending CN114750105A (en) | 2022-05-23 | 2022-05-23 | Pin puller based on memory alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114750105A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5771742A (en) * | 1995-09-11 | 1998-06-30 | Tini Alloy Company | Release device for retaining pin |
| KR20120009568A (en) * | 2010-07-19 | 2012-02-02 | 한국과학기술원 | Low Shock, Non-Explosive Release Device Using Shape Memory Alloy and Release Method |
| CN106494651A (en) * | 2016-11-21 | 2017-03-15 | 上海航天控制技术研究所 | A kind of non-firer's separator of low impact |
| CN108298112A (en) * | 2018-02-07 | 2018-07-20 | 北京深空动力科技有限公司 | A kind of two level compression relieving mechanism of non-firer's driving |
| CN109383850A (en) * | 2018-09-04 | 2019-02-26 | 北京灵翼航宇科技有限公司 | A kind of non-firer's driver divides valve nut type tripper |
| CN113028910A (en) * | 2021-05-24 | 2021-06-25 | 中国科学院力学研究所 | Redundant double-unlocking driving release device and carrier rocket |
-
2022
- 2022-05-23 CN CN202210563386.1A patent/CN114750105A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5771742A (en) * | 1995-09-11 | 1998-06-30 | Tini Alloy Company | Release device for retaining pin |
| KR20120009568A (en) * | 2010-07-19 | 2012-02-02 | 한국과학기술원 | Low Shock, Non-Explosive Release Device Using Shape Memory Alloy and Release Method |
| CN106494651A (en) * | 2016-11-21 | 2017-03-15 | 上海航天控制技术研究所 | A kind of non-firer's separator of low impact |
| CN108298112A (en) * | 2018-02-07 | 2018-07-20 | 北京深空动力科技有限公司 | A kind of two level compression relieving mechanism of non-firer's driving |
| CN109383850A (en) * | 2018-09-04 | 2019-02-26 | 北京灵翼航宇科技有限公司 | A kind of non-firer's driver divides valve nut type tripper |
| CN113028910A (en) * | 2021-05-24 | 2021-06-25 | 中国科学院力学研究所 | Redundant double-unlocking driving release device and carrier rocket |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3677519B1 (en) | Split nut type unlocking device with non-explosive actuator | |
| CN111284731B (en) | Electromagnetic locking and releasing mechanism for separating star from arrow and electromagnetic locking and releasing method | |
| US5695306A (en) | Fusible member connection apparatus and method | |
| US7263753B2 (en) | Blind bolt installation tool | |
| WO2002061291A1 (en) | Connector assembly | |
| US6450064B1 (en) | Resettable separation mechanism with anti-friction bearings | |
| CN108100311B (en) | Microsatellite separation device and release method thereof | |
| US8540206B2 (en) | Multi-stable actuation apparatus and methods for making and using the same | |
| US5397244A (en) | Preload release mechanism | |
| CN109774985B (en) | Large-stroke large-load shape memory alloy driven connection release mechanism | |
| CN101402399A (en) | Intelligent unlocking mechanism of memory alloy | |
| CN114750105A (en) | Pin puller based on memory alloy | |
| EP1115982B1 (en) | Fastener arrangements, method of connecting together two members and tool for applying or releasing the fastener arrangements | |
| CN111946707A (en) | Split type memory alloy spring pin | |
| US8786387B2 (en) | Magnetic actuator | |
| CN108622413B (en) | Connection structure and unmanned aerial vehicle | |
| CN112344812B (en) | Restorable in-place locking electromagnetic pin puller and restorable method thereof | |
| US10431396B2 (en) | Charging ram assembly, and pin assembly and securing method therefor | |
| CN112099582B (en) | Unlocking mechanism for hard disk cage | |
| CN117184460A (en) | Load quick-change interface and quick-change method for electromagnetic power-off type space on-orbit control | |
| EP2460637A1 (en) | Method of manufacturing a push rod of a vacuum interrupter | |
| JP2004537686A5 (en) | ||
| CN217833511U (en) | Electromagnetic excitation pin pulling device with self-locking function | |
| CN110676129B (en) | Circuit breaker closing resistor tripping mechanism and circuit breaker | |
| EP4299451A1 (en) | Retaining and releasing device and assembly for spaceships |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220715 |
|
| RJ01 | Rejection of invention patent application after publication |