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SMA wire driven pin puller

A technology of a pin puller and a driving spring, which is applied in the aerospace field, can solve the problems of large impact of the unlocking mechanism of the spacecraft, cannot be reused, and is highly polluting, and achieves the effects of light weight, convenient use and low vibration

Inactive Publication Date: 2017-01-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing spacecraft unlocking mechanism has a large impact when it works, which affects the equipment, and is highly polluting, cannot be reused, and has a complex structure and high cost, the present invention further proposes a pin puller driven by SMA wire

Method used

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  • SMA wire driven pin puller
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  • SMA wire driven pin puller

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Experimental program
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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1 to Figure 4 Describe this embodiment, a pin puller driven by an SMA wire in this embodiment includes a pin 1, an outer shell 6, a sliding bolt 7, a return spring 5, a driving spring 8, an SMA wire 12 and two limit steel balls 9, The separation plate 2 and the connection plate 3 are arranged horizontally from top to bottom in turn, the outer shell 6 is arranged on the lower end of the connecting plate 3, the upper end surface of the outer shell 6 is fixedly connected with the connecting plate 3 through the upper end cover 4, and the lower end surface of the outer shell 6 is fixed. Connected with the lower end cover 10, the inside of the outer casing 6 is provided with a pin 1, the upper end of the pin 1 is inserted vertically on the connecting plate 3 and the separation plate 2, the lower end of the pin 1 is vertically inserted inside the outer casing 6, and the upper end of the pin 1 A lower end plate 1-1 is fixed vert...

specific Embodiment approach 2

[0026] Specific implementation mode two: combination Figure 1 to Figure 2 To illustrate this embodiment, the lower end surface of the outer casing 6 in this embodiment is provided with a positioning groove 6-3, the lower end cover 10 is arranged on the notch of the positioning groove 6-3, and the bottom of the positioning groove 6-3 The middle part is provided with a pin through hole 6-4, and the upper end surface of the outer shell 6 is provided with a U-shaped groove 6-5, and the pin through hole 6-4 is connected with the groove bottom of the U-shaped groove 6-5, and the pin 1 is inserted in the In the pin through hole 6-4 and the U-shaped groove 6-5, the back-moving spring 5, the sliding bolt 7 and two spacer steel balls 9 are all arranged in the U-shaped groove 6-5, and the lower end of the spacer steel ball 9 is arranged on the U-shaped The curved surface of groove 6-5. The undisclosed technical features in this embodiment are the same as those in the first embodiment. ...

specific Embodiment approach 3

[0028] Specific implementation mode three: combination Figure 1 to Figure 2 Describe this embodiment, the edge of the groove bottom of the positioning groove 6-3 described in this embodiment is provided with an annular groove 6-6 along the circumferential direction, the driving spring 8 is arranged in the annular groove 6-6, and one end of the driving spring 8 is arranged on the At the bottom of the annular groove 6-6, the other end of the driving spring 8 is arranged on the upper end surface of the lower end plate 1-1. The undisclosed technical features in this embodiment are the same as those in the second embodiment.

[0029] Such a design can drive the effective positioning of the spring 8 .

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Abstract

The invention provides an SMA wire driven pin puller, relates to the technical field of spaceflight and aims at solving the problem that an existing spacecraft unlocking mechanism is large in working impact and strong in contamination, affects equipment, cannot be repeatedly used and meanwhile is complicated in structure and low in cost. The SMA wire driven pin puller comprises a pin, an outer housing, a sliding bolt, a reset spring, a driving spring, an SMA wire and two steel limiting balls, wherein the pin is arranged inside the outer housing, a lower end plate is vertically and fixedly connected to the lower end face of the pin, the driving spring is arranged between the upper end face of the lower end plate and the outer housing, the sliding bolt is arranged at the upper end of the lower end plate, the reset spring is arranged between the lower end face of an upper end cap and the upper end face of the sliding bolt, two spherical grooves are symmetrically formed in the outer circumferential side wall of the lower end of the pin, one steel limiting ball is arranged in each spherical groove, and one end of the SMA wire sequentially penetrates through an oblique hole, a wire penetrating through hole, a rectangular groove, another wire penetrating through hole and another oblique hole successively. The SMA wire driven pin puller is used for spacecraft unlocking.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a pin puller driven by an SMA wire. Background technique [0002] Pin pullers are used to release pins or other retaining elements from connecting different types of structures such as space vehicles. Applications for such release devices include payload deployment from a space vehicle, release of crash-resistant emergency hatches, and the like. At present, the unlocking mechanisms of spacecraft are mostly pyrotechnic bolts and paraffin drivers. [0003] The pyrotechnic bolt protects the payload during launch and does not unlock it; after issuing a program command, it can be unlocked on-orbit in a timely and synchronous manner. However, when pyrotechnics are working, they will produce a large impact, which will have a great impact on the satellite's attitude control and sensitive equipment. The chemical gas released after the explosion of pyrotechnics is polluting and will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B27/02
CPCB25B27/02
Inventor 岳洪浩俞正旺杨飞邓宗全姜生元
Owner HARBIN INST OF TECH