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Two-way torsion spring pretightening mechanism

A pre-tightening mechanism, two-way torsion spring technology, used in torsion springs, mechanical equipment, springs/shock absorbers, etc., can solve the problems of difficult to achieve precise and consistent pre-tightening force, difficult processing and assembly, complex principle and structure, etc. , to achieve the effect of being conducive to mass production and popularization, low cost and exquisite principle

Active Publication Date: 2017-11-24
XIAN FLIGHT SELF CONTROL INST OF AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional two-way pre-tightening torsion spring mechanism, at least two torsion springs must be installed in two directions to achieve two-way pre-tightening. This principle structure has its disadvantages as follows: many components, complex principle structure, and low reliability ; high cost; large weight and volume, not suitable for occasions with compact overall space and strict weight requirements; it is difficult to achieve accurate and consistent preload of torsion springs in two directions; difficult to process and assemble

Method used

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  • Two-way torsion spring pretightening mechanism

Examples

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Effect test

Embodiment 1

[0036] A two-way torsion spring preload mechanism, see figure 1 The structure includes cylinder 1, crescent plate 1 2A, crescent plate 2 2B, output shaft 3, torsion spring 4, push block 1 5A, push block 2 5B, stop block 1 6A, stop block 2 6B, retaining ring 1 7A, retaining ring two 7B;

[0037] Cylinder 1 is a hollow cylinder with openings at both ends, with an outer diameter of 20mm, a height of 44mm, and an inner diameter of 16mm;

[0038] On the inner side of the cylinder wall of the cylinder 1 close to the openings at both ends of the cylinder 1, there are respectively provided with annular chute, the groove width is 2.2mm, and the groove depth is 0.8mm;

[0039] Crescent plate 1 2A and crescent plate 2 2B are fan-shaped annular structures, with the same external dimensions, outer diameter 17.2mm, inner diameter 6.3mm, thickness 2mm, fan angle 120 degrees, and a through hole with a diameter of 2mm on the fan surface; crescent plate 1 2A, the second crescent plate 2B are ...

Embodiment 2

[0048] A two-way torsion spring preload mechanism, see figure 1 The structure includes cylinder 1, crescent plate 1 2A, crescent plate 2 2B, output shaft 3, torsion spring 4, push block 1 5A, push block 2 5B, stop block 1 6A, stop block 2 6B, retaining ring 1 7A, retaining ring two 7B;

[0049] Cylinder 1 is a hollow cylinder with openings at both ends, with an outer diameter of 35 mm, a height of 50 mm, and an inner diameter of 30 mm;

[0050] On the inner side of the cylinder wall of the cylinder 1 close to the openings at both ends of the cylinder 1, there are respectively ring-shaped sliding grooves with a groove width of 3.2mm and a groove depth of 0.8mm;

[0051] Crescent plate 1 2A and crescent plate 2 2B are fan-shaped annular structures with consistent dimensions, outer diameter 31.2mm, inner diameter 8.3mm, thickness 3mm, fan angle 120 degrees, and a through hole with a diameter of 3mm on the fan surface; crescent plate 1 2A, the second crescent plate 2B are instal...

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Abstract

The invention discloses a two-way torsion spring pretightening mechanism, and belongs to the technical field of mechanical transmission. A cylinder (1) is of a fixed support structure; a crescent plate 1 (2A) and a crescent plate 2 (2B) are respectively mounted in chutes at two ends of the cylinder (1); an output shaft (3) extends out from inner holes of the crescent plate 1 (2A) and the crescent plate 2 (2B), and is provided with a pushing block 1 (5A) and a pushing block 2 (5B); a stopper 1 (6A) and a stopper 2 (6B) are arranged on the inner side of the cylinder wall of the cylinder (1); two ends of a torsion spring (4) are fixedly connected with the crescent plate 1 (2A) and the crescent plate 2 (2B); after a certain pretightening torque is preset on the torsion spring (4) during mounting, the output shaft (3) needs to overcome the pretightening torque with the same magnitude no matter compression or stretching, so that single torsion spring achieves a two-way pretightening function; and compared with a traditional two-way pretightening mechanism, the two-way torsion spring pretightening mechanism has the characteristics of precise pretightening force, compact structure, small size, easiness in machining and low cost.

Description

technical field [0001] The invention relates to a bidirectional torsion spring pretensioning mechanism, which belongs to the technical field of mechanical transmission. Background technique [0002] The torsion spring mechanism is an important functional component in the field of mechanical transmission. The torque transmission and energy storage can be realized by using the preload characteristics of the torsion spring. In many applications, the moving parts need to do rotary reciprocating motion, requiring the torsion spring mechanism to have the pre-tightening function in both positive and negative directions. In the traditional two-way pre-tightening torsion spring mechanism, at least two torsion springs must be installed in two directions to achieve two-way pre-tightening. This principle structure has its disadvantages as follows: many components, complex principle structure, and low reliability ; high cost; large weight and volume, not suitable for occasions with comp...

Claims

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Application Information

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IPC IPC(8): F16F1/16
CPCF16F1/16
Inventor 田磊刘向姚成法刘莹莹任鹏杰李少武聂勇雷朝
Owner XIAN FLIGHT SELF CONTROL INST OF AVIC
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