CN115139079A - Large-stroke pin puller based on shape memory alloy and satellite-rocket separation device - Google Patents
Large-stroke pin puller based on shape memory alloy and satellite-rocket separation device Download PDFInfo
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- CN115139079A CN115139079A CN202210598954.1A CN202210598954A CN115139079A CN 115139079 A CN115139079 A CN 115139079A CN 202210598954 A CN202210598954 A CN 202210598954A CN 115139079 A CN115139079 A CN 115139079A
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 37
- 238000000926 separation method Methods 0.000 title claims abstract description 16
- 238000002788 crimping Methods 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 9
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 229910010380 TiNi Inorganic materials 0.000 claims description 3
- 239000012671 ceramic insulating material Substances 0.000 claims description 3
- 239000002783 friction material Substances 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
Abstract
The invention provides a large-stroke pin puller and a satellite-rocket separation device based on shape memory alloy. The pin puller realizes effective superposition of three-level retraction strokes through mutual series coupling of the first-level sliding sleeve, the second-level sliding sleeve and the third-level sliding pin, the strokes can be changed into three times under the original overall dimension, the recovery strain breaks through the limit of 5% of the material, and the equivalent increase can be realized to 15%. The memory alloy pin puller has the advantages of large stroke, high safety margin, compact structure and small appearance, so that the memory alloy pin puller is more suitable for high-reliability connection and unlocking of space equipment, and the application range of the memory alloy pin puller is greatly expanded.
Description
Technical Field
The invention belongs to the technical field of connection and separation of spacecrafts, and particularly relates to a large-stroke pin puller and a satellite-rocket separation device based on shape memory alloy.
Background
The conventional typical memory alloy pin puller usually adopts a mode of connecting a plurality of memory alloy wires in parallel, so that the pin pulling force can be improved, but the pin pulling stroke is not improved; the memory alloy wire has a certain recovery strain, and if the pin pulling stroke is increased, the same amplitude of the overall external dimension is increased, so that the memory alloy wire is difficult to apply to aerospace products with compact structures. If single wire is directly bent in multiple stages, the stroke can be increased theoretically, but the memory alloy wire is difficult to shuttle and move at the bent position actually, and the phenomenon of blocking is easy to occur.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a large-stroke pin puller and a satellite-rocket separation device based on shape memory alloy.
The invention is realized by the following technical scheme, the invention provides a large-stroke pin puller based on shape memory alloy, and the pin puller comprises: the device comprises a three-level sliding pin 1, a two-level sliding sleeve 2, a one-level sliding sleeve 3, a shell 4, a shaft sleeve 5, a return spring 6, a three-level wire 7, a two-level wire 8, a one-level wire 9, an insulating base 10, a crimping sleeve 11, a rear end cover 12, an end cover screw 13 and an electrified cable 14; the primary sliding sleeve 3, the secondary sliding sleeve 2 and the tertiary sliding pin 1 are respectively triggered by the tertiary memory alloy wires, and the three are mutually coupled in series, so that the effective superposition of the tertiary retraction stroke is realized, and the retraction stroke is increased to three times of the original retraction stroke under the original overall dimension.
Further, the three-level sliding pin 1 is in a cylindrical pin form, a three-level check ring 103 is arranged at the middle front end, two three-level screw rotation bosses 102 are symmetrically arranged on two sides of the three-level sliding pin 1, a pin head 101 is arranged at the front end of the three-level sliding pin 1, and a pin body 105 is arranged at the rear end of the three-level sliding pin; the front side surface of the tertiary wire rotary boss 102 is embedded with an insulating base 10, and four tertiary guide surfaces 104 are provided on two sides.
Further, the secondary sliding sleeve 2 is in a central symmetry form, the front end of the secondary sliding sleeve is provided with a secondary check ring 21 which is arranged on the front side of the tertiary check ring 103 of the tertiary sliding pin 1, and the center of the secondary check ring 21 is provided with an opening which is in sliding fit with the pin head 101; two secondary wire rotary bosses 22 are arranged on two sides, and an insulating seat 10 is embedded on the front side surface of the secondary wire rotary boss; the middle part of the secondary sliding sleeve 2 is an I-shaped supporting leg 23, two tertiary wire fixing bosses 24 are arranged at the positions of the tail end of the secondary wire rotating boss 22 deviating from the circumferential direction by 60 degrees, and the rear side surface of the secondary wire rotating boss is embedded with an insulating base 10; six secondary guide surfaces 25 are provided on the right side surface of the secondary wire rotary boss 22, the left side surface of the I-shaped supporting leg 23 and the left side surface of the tertiary wire fixing boss 24.
Further, the primary sliding sleeve 3 is in a central symmetry form, a primary retainer ring 31 is arranged at the front end of the primary sliding sleeve and is arranged on the front side of a secondary retainer ring 21 of the secondary sliding sleeve 2, and an opening is formed in the center of the primary retainer ring 31 and is in sliding fit with the pin head 101; two primary wire rotary bosses 32 are arranged on two sides, and an insulating seat 10 is embedded on the front side surface of the primary wire rotary boss; the middle part of the primary sliding sleeve 3 is provided with two II supporting legs 33, the tail end of the primary sliding sleeve deviates from the circumferential direction of a primary wire rotary boss 32 by 60 degrees and is provided with two secondary wire fixing bosses 34, and the rear side surface of the primary sliding sleeve is embedded with an insulating base 10; six primary guide surfaces 35 are provided on two outer sides of the supporting leg 33 of the II, the right side surface of the primary wire rotary boss 32 and the left side surface of the secondary wire fixing boss 34.
Furthermore, four mounting holes are formed in the outer side of the shell 4, and a shaft sleeve mounting groove 42 is formed in the front end of the shell; the inner wall 43 is a cylindrical cavity, and two radial limiting bosses 41 are arranged at the front end of the cavity and matched with the primary guide surface 35 of the primary sliding sleeve 3; the cylindrical surface of the inner wall 43 is coated with a molybdenum disulfide coating, and the diameter of the molybdenum disulfide coating is the same as the diameter of the outermost circumference of the third-stage sliding pin 1, the second-stage sliding sleeve 2 and the first-stage sliding sleeve 3, so that sliding fit is formed; the composite shaft sleeve 5 is made of low-friction material, the excircle of the composite shaft sleeve is in interference fit with the shaft sleeve mounting groove 42, and the inner circle of the composite shaft sleeve is in clearance sliding fit with the pin head 101.
Further, the tertiary guide surface 104, the secondary guide surface 25 and the primary guide surface 35 form sliding fit with each other, and provide radial limit, and the matching surfaces of the tertiary guide surface, the secondary guide surface and the primary guide surface are coated with molybdenum disulfide coatings.
Furthermore, the tertiary wire 7, the secondary wire 8 and the primary wire 9 are all made of TiNi shape memory alloy, are installed in a U-shaped rotary mode, are distributed in sequence along the circumferential direction in an anticlockwise mode, and are divided into two groups in total and are in a central symmetry mode; the rotary end of the tertiary wire 7 penetrates through the insulating seat 10 of the tertiary wire rotary boss 102, and the tail end of the tertiary wire 7 is fixed on the insulating seat 10 of the tertiary wire fixing boss 24 through a crimping sleeve 11; the rotary end of the secondary wire 8 passes through the insulating base 10 of the secondary wire rotary boss 22, and the tail end of the secondary wire 8 is fixed on the insulating base 10 of the secondary wire fixing boss 34 through the crimping sleeve 11; the rotary end of the primary wire 9 passes through the insulating base 10 of the rotary boss 32 of the primary wire, and the tail end of the primary wire is fixed on the rear end cover 12 by the crimping sleeve 11.
Further, the rear end cover 12 is made of zirconia ceramic insulating material, and is provided with four wiring holes 121 for accommodating the primary wires 9; four process holes 122 are arranged, and the envelope size of the process holes is larger than that of the insulating base 10; four mounting holes 123 are arranged, and the rear end cover 12 is fixedly connected to the rear end of the shell 4 through the mounting holes 123 by the end cover screws 13; a guide hole 124 is centrally provided to slidably engage the pin body 105.
Further, the return spring 6 is placed with the pin body 105 as a mandrel, with the front end contacting the third-stage retainer ring 103 and the rear end contacting the rear end cap 12.
The invention also provides a micro-nano satellite and rocket separation device, which comprises the shape memory alloy-based large-stroke pin puller, a satellite 15 and a carrying adapter 16.
The invention has the beneficial effects that:
according to the shape memory alloy-based large-stroke pin puller, the three-stage retraction stroke is effectively superposed by mutually coupling the primary sliding sleeve, the secondary sliding sleeve and the tertiary sliding pin in series, the stroke is three times that of the original stroke under the original overall dimension, the recovery strain breaks through the 5% limit of the material, and the equivalent expansion can be increased to 15%. The memory alloy pin puller has the advantages of large stroke, high safety margin, compact structure and small appearance, so that the memory alloy pin puller is more suitable for high-reliability connection and unlocking of space equipment, and the application range of the memory alloy pin puller is greatly expanded.
Drawings
FIG. 1 is a schematic structural view of a locking state of a large-stroke pin puller according to the present invention;
FIG. 2 is a cross-sectional view of the locking state of the large stroke pin puller according to the present invention;
FIG. 3 is a schematic view of the internal structure of the pin puller in the locked state according to the present invention;
FIG. 4 is a schematic view of the internal structure of the pin puller in a retracted state according to the present invention;
FIG. 5 is a schematic view of a three stage slide pin configuration according to the present invention;
FIG. 6 is a schematic view of a two-stage sliding sleeve structure according to the present invention;
FIG. 7 is a schematic view of a one-stage sliding sleeve structure according to the present invention;
FIG. 8 is a schematic view of an insulating base according to the present invention;
FIG. 9 is a cross-sectional view of the housing of the present invention;
FIG. 10 is a schematic view of a rear end cap according to the present invention;
FIG. 11 is a schematic view of the distribution of memory alloy wires according to the present invention;
FIG. 12 is a schematic view of a crimp sleeve according to the present invention;
FIG. 13 is a rear view of the pin puller of the present invention;
FIG. 14 is a schematic view of a satellite-rocket connection using a pin puller according to the present invention;
FIG. 15 is a schematic view of the separation of the star and arrow using the pin puller according to the present invention;
in the figure, 1-three stages of sliding pins; 2-two-stage sliding sleeve; 3-first stage sliding sleeve; 4-a housing; 5-shaft sleeve; 6-a return spring; 7-third-order silk; 8-secondary filament; 9-first grade silk; 10-insulating base; 11-a crimping sleeve; 12-rear end cap; 13-end cap screw; 14-an electrified Cable; 15-satellite; 16-carrying adapter; 17-separation spring; 18-mounting screws; 101-pin head; 102-three-stage wire rotary boss; 103-third level retainer ring; 104-tertiary guide surface; 105-pin body; 21-secondary retainer ring; 22-secondary wire rotary boss; 23- "I" shaped legs; 24-fixing a boss by using a tertiary thread; 25-secondary guide surface; 31-primary retainer ring; 32-first-stage wire rotary boss; 33- "II" leg; 34-fixing boss of secondary wire; 35-primary guide surface; 41-spacing boss; 42-shaft sleeve mounting groove; 43-inner wall; 111-wire hole; 121-wiring hole; 122-process hole; 123-mounting hole; 124-guide hole; 151-Shan Erxiao orifice seats; 161-double lug pin hole seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
With the increasing demand for small impact of aerospace unlocking separation, the memory alloy pin puller is developed and applied more and more, and the working principle of the memory alloy pin puller is that a memory alloy wire generates phase change when being electrified and heated, generates strain, shortens the length, generates restoring force to overcome load and realizes retraction. The retraction stroke is limited by the maximum phase change strain of the memory alloy wire, and is generally only about 5% of the length of the wire, for example, the stroke of a typical pin puller with the external length of 50mm is only about 1 mm. When the pin pulling stroke is large in order to improve reliability and safety margin, the typical pin puller is selected, which means that the external dimension of the pin puller is greatly increased, is not beneficial to installation layout, and limits the wide application of the memory alloy pin puller. Therefore, a large-stroke pin puller with compact structure and small appearance is needed.
With reference to fig. 1 to 15, the present invention provides a large stroke pin puller based on shape memory alloy, the pin puller comprising: the device comprises a three-level sliding pin 1, a two-level sliding sleeve 2, a one-level sliding sleeve 3, a shell 4, a shaft sleeve 5, a return spring 6, a three-level wire 7, a two-level wire 8, a one-level wire 9, an insulating base 10, a crimping sleeve 11, a rear end cover 12, an end cover screw 13 and an electrified cable 14; the primary sliding sleeve 3, the secondary sliding sleeve 2 and the tertiary sliding pin 1 are respectively triggered by the tertiary memory alloy wires, and the three are mutually coupled in series, so that the effective superposition of the tertiary retraction stroke is realized, and the retraction stroke is increased to three times of the original retraction stroke under the original overall dimension.
The three-stage sliding pin 1 is in a cylindrical pin form, a three-stage check ring 103 is arranged at the middle front end, two three-stage screw rotation bosses 102 are symmetrically arranged on two sides of the three-stage sliding pin 1, a pin head 101 is arranged at the front end of the three-stage sliding pin 1, and a pin body 105 is arranged at the rear end of the three-stage sliding pin; the front side surface of the tertiary wire rotary boss 102 is embedded with an insulating base 10, and four tertiary guide surfaces 104 are provided on two sides.
The secondary sliding sleeve 2 is in a central symmetry form, the front end of the secondary sliding sleeve is provided with a secondary check ring 21 which is arranged on the front side of a tertiary check ring 103 of the tertiary sliding pin 1, and the center of the secondary check ring 21 is provided with an opening which is in sliding fit with the pin head 101; two secondary wire rotary bosses 22 are arranged on two sides, and an insulating seat 10 is embedded on the front side surface of the secondary wire rotary boss; the middle part of the secondary sliding sleeve 2 is provided with an I-shaped supporting leg 23, the tail end of the secondary sliding sleeve is provided with two tertiary wire fixing bosses 24 at positions deviating from the circumferential direction of the secondary wire rotary boss 22 by 60 degrees, and the rear side surface of the secondary sliding sleeve is embedded with an insulating base 10; six secondary guide surfaces 25 are provided on the right side surface of the secondary wire rotary boss 22, the left side surface of the I-shaped supporting leg 23 and the left side surface of the tertiary wire fixing boss 24.
The primary sliding sleeve 3 is in a central symmetry form, the front end of the primary sliding sleeve is provided with a primary retainer ring 31 which is arranged on the front side of a secondary retainer ring 21 of the secondary sliding sleeve 2, and the center of the primary retainer ring 31 is provided with an opening which is in sliding fit with the pin head 101; two primary wire rotary bosses 32 are arranged on two sides, and an insulating seat 10 is embedded on the front side surface of the primary wire rotary boss; the middle part of the primary sliding sleeve 3 is provided with two 'II' supporting legs 33, the tail end of the primary sliding sleeve is provided with two secondary wire fixing bosses 34 deviating from the circumferential direction of the primary wire rotary boss 32 by 60 degrees, and the rear side surface of the primary sliding sleeve is embedded with the insulating base 10; six primary guide surfaces 35 are provided on two outer sides of the supporting leg 33 of the II, the right side surface of the primary wire rotary boss 32 and the left side surface of the secondary wire fixing boss 34.
The insulating base 10 is made of zirconia ceramic material and is in the shape of an oval gasket, and two wiring holes 111 are formed in the insulating base.
Four mounting holes are formed in the outer side of the shell 4, and a shaft sleeve mounting groove 42 is formed in the front end of the shell; the inner wall 43 is a cylindrical cavity, and two radial limiting bosses 41 are arranged at the front end of the cavity and matched with the primary guide surface 35 of the primary sliding sleeve 3; the cylindrical surface of the inner wall 43 is coated with a molybdenum disulfide coating, and the diameter of the molybdenum disulfide coating is the same as that of the outermost circumference of the third-stage sliding pin 1, the second-stage sliding sleeve 2 and the first-stage sliding sleeve 3, so that sliding fit is formed; the composite shaft sleeve 5 is made of low-friction material, the excircle of the composite shaft sleeve is in interference fit with the shaft sleeve mounting groove 42, and the inner circle of the composite shaft sleeve is in clearance sliding fit with the pin head 101.
And the third-stage guide surface 104, the second-stage guide surface 25 and the first-stage guide surface 35 are in sliding fit with each other, and provide radial limit, and the matching surfaces of the third-stage guide surface, the second-stage guide surface and the first-stage guide surface are coated with molybdenum disulfide coatings.
The three-stage wire 7, the two-stage wire 8 and the first-stage wire 9 are all made of TiNi shape memory alloy, are installed in a U-shaped rotary mode, are distributed in sequence along the circumferential direction in a counterclockwise mode, and are in a centrosymmetric mode; the rotary end of the tertiary wire 7 penetrates through the insulating base 10 of the tertiary wire rotary boss 102, and the tail end of the tertiary wire 7 is fixed on the insulating base 10 of the tertiary wire fixing boss 24 through a crimping sleeve 11; the rotary end of the secondary wire 8 passes through the insulating base 10 of the secondary wire rotary boss 22, and the tail end of the secondary wire 8 is fixed on the insulating base 10 of the secondary wire fixing boss 34 through the crimping sleeve 11; the rotary end of the primary wire 9 passes through the insulating base 10 of the rotary boss 32 of the primary wire, and the tail end of the primary wire is fixed on the rear end cover 12 by the crimping sleeve 11.
The crimping sleeve 11 is made of brass material, and has twelve positions, wherein one side is respectively crimped with the third-stage wire, the second-stage wire and the first-stage wire, and the other side is crimped with the electrified cable 14.
The rear end cover 12 is made of zirconia ceramic insulating material and is provided with four wiring holes 121 for accommodating the primary wires 9; four process holes 122 are arranged, and the envelope size of the process holes is slightly larger than that of the insulating base 10; four mounting holes 123 are arranged, and the rear end cover 12 is fixedly connected to the rear end of the shell 4 through the mounting holes 123 by the end cover screws 13; a guide hole 124 is centrally provided to slidably engage the pin body 105.
The return spring 6 is placed by taking the pin body 105 as a mandrel, the front end of the return spring is in contact with the third-stage retainer ring 103, and the rear end of the return spring is in contact with the rear end cover 12.
Locked state
In the locked state, as shown in fig. 2 and 4, the thrust of the return spring 6 prestretches the tertiary wire 7, the secondary wire 8 and the primary wire 9 from the original length state, and finally the thrust acts on the tertiary retainer ring 103, the secondary retainer ring 21 and the primary retainer ring 31 in sequence to press the tertiary sliding pin 1, the secondary sliding sleeve 2 and the primary sliding sleeve 3 into the housing 4, so that the pin head 101 is in the extended state.
Retracted state
The retraction state is as shown in fig. 4, the positive and negative electrodes shown in fig. 13 are electrified, the primary wire 9 is electrified and retracted to drive the primary sliding sleeve 3 to retract by a distance s1, and the primary check ring 31 further drives the secondary sliding sleeve 2 and the tertiary sliding pin 1 to retract by s1; the secondary wire 8 is electrified and contracted to drive the secondary sliding sleeve 2 to retract for a distance s2, and the secondary check ring 21 further drives the tertiary sliding pin 1 to retract for s2; and electrifying the tertiary wire 7 to contract, and driving the tertiary sliding pin 1 to retract s3. Therefore, the total retraction stroke of the three-stage sliding pin 1 is the stroke superposition of three groups of memory alloy wires, namely the stroke s = s1+ s2+ s3 of the pin puller, and the retraction stroke of the pin puller is greatly enlarged.
The invention also provides a micro/nano satellite and satellite separation device which comprises the large-stroke pin puller based on the shape memory alloy, a satellite 15 and a carrying adapter 16.
The application of the large-stroke pin puller in the separation of satellite and rocket of the micro-nano satellite is explained below. As shown in fig. 13 and 14, the carrier adapter 16 is provided with a double-lug pin hole seat 161, the single-lug pin hole seat 151 on the lower surface of the satellite 15 is located in the middle of the double-lug pin hole seat 161, and the pin puller pin head needs to pass through the pin hole at the same time, so that a large stroke is required. The large-stroke pin puller is fixed on the carrying adapter 16 through a mounting hole on the shell 4 by using a mounting screw 18, and a pin head 101 of the large-stroke pin puller sequentially passes through a double-lug pin hole seat 161 of the carrying adapter 16, a single-lug pin hole seat 151 of the satellite 15 and a double-lug pin hole seat 161 of the carrying adapter 16 to fixedly connect the satellite 15 and the carrying adapter 16 together, so that reliable connection is provided. When the power is on, the pin head 101 retracts, the single lug pin hole seat 151 is disconnected from the double lug pin hole seat 161, the satellite 15 is pushed away from the carrying adapter 16 by the four separation springs 17, and unlocking and separation are completed.
The invention provides a large-stroke pin puller and a star-arrow separation device based on shape memory alloy, which are introduced in detail, wherein a specific example is applied to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A large stroke pin puller based on shape memory alloy, the pin puller comprising: the device comprises a three-level sliding pin (1), a two-level sliding sleeve (2), a one-level sliding sleeve (3), a shell (4), a shaft sleeve (5), a return spring (6), a three-level wire (7), a two-level wire (8), a one-level wire (9), an insulating base (10), a crimping sleeve (11), a rear end cover (12), an end cover screw (13) and a power-on cable (14); the primary sliding sleeve (3), the secondary sliding sleeve (2) and the tertiary sliding pin (1) are respectively triggered through the tertiary memory alloy wires, and the three are mutually coupled in series, so that the effective superposition of the tertiary retraction stroke is realized, and the retraction stroke is increased to three times of the original retraction stroke under the original overall dimension.
2. The pin puller according to claim 1, wherein the three-level sliding pin (1) is in a cylindrical pin form, a three-level retainer ring (103) is arranged at the middle front end of the three-level sliding pin, two three-level wire rotation bosses (102) are symmetrically arranged on two sides of the three-level sliding pin, the front end of the three-level sliding pin (1) is a pin head (101), and the rear end of the three-level sliding pin is a pin body (105); an insulating seat (10) is embedded in the front side face of the three-stage wire rotary boss (102), and four three-stage guide faces (104) are provided on two sides of the three-stage wire rotary boss.
3. The pin puller according to claim 2, wherein the secondary sliding sleeve (2) is in a central symmetry form, a secondary retainer ring (21) is arranged at the front end of the secondary sliding sleeve and arranged at the front side of a tertiary retainer ring (103) of the tertiary sliding pin (1), and an opening is formed in the center of the secondary retainer ring (21) and is in sliding fit with the pin head (101); two secondary wire rotary bosses (22) are arranged on two sides, and an insulating seat (10) is embedded on the front side surface of the secondary wire rotary bosses; the middle part of the secondary sliding sleeve (2) is provided with an I-shaped supporting leg (23), the tail end of the secondary sliding sleeve deviates from the circumferential direction of the secondary wire rotary boss (22) by 60 degrees and is provided with two tertiary wire fixing bosses (24), and the rear side surface of the secondary sliding sleeve is embedded with an insulating seat (10); six secondary guide surfaces (25) are provided on the right side surface of the secondary wire rotary boss (22), the left side surface of the I-shaped supporting leg (23) and the left side surface of the tertiary wire fixing boss (24).
4. The pin puller according to claim 3, wherein the primary sliding sleeve (3) is in a central symmetry form, a primary retainer ring (31) is arranged at the front end of the primary sliding sleeve and arranged at the front side of a secondary retainer ring (21) of the secondary sliding sleeve (2), and an opening is formed in the center of the primary retainer ring (31) and is in sliding fit with the pin head (101); two primary wire rotary bosses (32) are arranged on two sides, and an insulating seat (10) is embedded on the front side surface of the primary wire rotary boss; the middle part of the primary sliding sleeve (3) is provided with two 'II' supporting legs (33), the tail end of the primary sliding sleeve deviates from the circumferential direction of the primary wire rotary boss (32) by 60 degrees and is provided with two secondary wire fixing bosses (34), and the rear side surface of the primary sliding sleeve is embedded with an insulating seat (10); six primary guide surfaces (35) are provided on two outer sides of the II supporting legs (33), the right side surface of the primary wire rotary boss (32) and the left side surface of the secondary wire fixing boss (34).
5. The pin puller according to claim 4, wherein four mounting holes are formed in the outer side of the shell (4), and a shaft sleeve mounting groove (42) is formed in the front end of the shell; the inner wall (43) is a cylindrical cavity, and the front end of the cavity is provided with two radial limiting bosses (41) which are matched with the primary guide surface (35) of the primary sliding sleeve (3); the cylindrical surface of the inner wall (43) is coated with a molybdenum disulfide coating, and the diameters of the molybdenum disulfide coating are the same as those of the outermost circumferential surfaces of the three-stage sliding pin (1), the two-stage sliding sleeve (2) and the first-stage sliding sleeve (3), so that sliding fit is formed; the composite shaft sleeve (5) is made of low-friction materials, the outer circle of the composite shaft sleeve is in interference fit with the shaft sleeve mounting groove (42), and the inner circle of the composite shaft sleeve is in clearance sliding fit with the pin head (101).
6. The pin puller according to claim 5, wherein the tertiary guide surface (104), the secondary guide surface (25) and the primary guide surface (35) form a sliding fit with each other while providing a radial stop, and the mating surfaces thereof are coated with a molybdenum disulfide coating.
7. The pin puller according to claim 6, wherein the tertiary wire (7), the secondary wire (8) and the primary wire (9) are all made of TiNi shape memory alloy, are installed in a U-shaped rotary manner, are distributed in sequence along the circumferential direction anticlockwise, and are divided into two groups in total, and are in a central symmetry mode; the rotary end of the tertiary wire (7) penetrates through the insulating seat (10) of the tertiary wire rotary boss (102), and the tail end of the tertiary wire (7) is fixed on the insulating seat (10) of the tertiary wire fixing boss (24) through a crimping sleeve (11); the rotary end of the secondary wire (8) penetrates through the insulating seat (10) of the secondary wire rotary boss (22), and the tail end of the secondary wire (8) is fixed on the insulating seat (10) of the secondary wire fixing boss (34) through a crimping sleeve (11); the rotary end of the primary wire (9) passes through the insulating base (10) of the rotary boss (32) of the primary wire, and the tail end of the primary wire is fixed on the rear end cover (12) through the crimping sleeve (11).
8. The pin puller according to claim 7, wherein the rear end cap (12) is made of zirconia ceramic insulating material and is provided with four wire-passing holes (121) for accommodating the primary wire (9); four process holes (122) are arranged, and the envelope size of the process holes is larger than that of the insulating seat (10); four mounting holes (123) are formed, and the rear end cover (12) is fixedly connected to the rear end of the shell (4) through the mounting holes (123) by the end cover screws (13); the center is provided with a guide hole (124) which is in sliding fit with the pin body (105).
9. The pin puller according to claim 8, wherein the return spring (6) is placed with the pin body (105) as a mandrel, with the front end in contact with the tertiary retainer ring (103) and the rear end in contact with the rear end cap (12).
10. A micro-nano satellite and rocket separation device, which is characterized by comprising the shape memory alloy-based large-stroke pin extractor, a satellite (15) and a carrying adapter (16) according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210598954.1A CN115139079B (en) | 2022-05-30 | 2022-05-30 | Large-stroke pin puller and satellite and arrow separation device based on shape memory alloy |
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| CN202210598954.1A CN115139079B (en) | 2022-05-30 | 2022-05-30 | Large-stroke pin puller and satellite and arrow separation device based on shape memory alloy |
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| CN115139079B CN115139079B (en) | 2024-01-30 |
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| US4490975A (en) * | 1983-03-14 | 1985-01-01 | Raychem Corporation | Self-protecting and conditioning memory metal actuator |
| CN106438244A (en) * | 2016-11-11 | 2017-02-22 | 湖北三江航天红林探控有限公司 | Shape memory alloy driving actuator and driving method thereof |
| CN107035637A (en) * | 2017-06-02 | 2017-08-11 | 深圳市星河泉新材料有限公司 | A kind of shape memory alloy displacement superposition amplification drive mechanism |
| CN107749722A (en) * | 2017-12-06 | 2018-03-02 | 国网安徽省电力公司池州供电公司 | A kind of telescopic conveying device |
| CN109623726A (en) * | 2019-02-19 | 2019-04-16 | 北京微分航宇科技有限公司 | A kind of memorial alloy pin removal |
| CN114346957A (en) * | 2022-02-21 | 2022-04-15 | 北京中科宇航技术有限公司 | Memory alloy pin puller |
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2022
- 2022-05-30 CN CN202210598954.1A patent/CN115139079B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4490975A (en) * | 1983-03-14 | 1985-01-01 | Raychem Corporation | Self-protecting and conditioning memory metal actuator |
| CN106438244A (en) * | 2016-11-11 | 2017-02-22 | 湖北三江航天红林探控有限公司 | Shape memory alloy driving actuator and driving method thereof |
| CN107035637A (en) * | 2017-06-02 | 2017-08-11 | 深圳市星河泉新材料有限公司 | A kind of shape memory alloy displacement superposition amplification drive mechanism |
| CN107749722A (en) * | 2017-12-06 | 2018-03-02 | 国网安徽省电力公司池州供电公司 | A kind of telescopic conveying device |
| CN109623726A (en) * | 2019-02-19 | 2019-04-16 | 北京微分航宇科技有限公司 | A kind of memorial alloy pin removal |
| CN114346957A (en) * | 2022-02-21 | 2022-04-15 | 北京中科宇航技术有限公司 | Memory alloy pin puller |
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| CN115139079B (en) | 2024-01-30 |
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