CN105626677A

CN105626677A - Anti-tensile inner Lamina emergent torsion (LET) flexible hinge

Info

Publication number: CN105626677A
Application number: CN201610056428.7A
Authority: CN
Inventors: 刘凯; 曹毅; 朱景原; 丁锐; 葛姝翌
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2016-01-26
Filing date: 2016-01-26
Publication date: 2016-06-01

Abstract

The invention provides an anti-tensile inner Lamina emergent torsion (LET) flexible hinge. The problems that an inner LET flexible hinge cannot bear axial tensile loads and is low in tensile strength can be solved. The anti- tensile inner LET flexible hinge comprises an upper bent fragment, a lower bent fragment, torsion fragments, connection fragments and anti-tensile fragments. The upper bent fragment, the lower bent fragment and the torsion fragments are combined to be of an I-shaped structure through the connection fragments. The anti-tensile inner LET flexible hinge is characterized in that the two sides of the I-shaped structure are provided with the anti-tensile fragments parallel to the upper bent fragment, the lower bent fragment and the connection fragments correspondingly, so that T-shaped hollowed-out grooves are formed among the anti-tensile fragments, the torsion fragments and the connection fragments.

Description

LET flexible hinge in tension

Art

The present invention relates to LEMs flexible hinge structure field, be specially LET flexible hinge in a kind of tension.

Background technology

LEMs (LaminaEmergentMechanisms) is machined by light sheet material, and can realize the novel compliant mechanism of a class [6] of motion outside plane. Except possessing other compliant mechanism advantage, LEMs also has unique advantage, and as simple in processing technique, economical, its flatness of the response also can reduce storage, assembly space.

At present, Chinese scholars focuses primarily upon in the design of flexible hinge for the research of LEMs. Jacobsen et al. devises intraarticular LET (LaminaEmergentTorsion) flexible hinge the most commonly used in current LEMs and outer LET flexible hinge, such hinge is different from traditional hinge and obtains motion by rotating the surface moved relative to each other, submissive hinge obtains desirable movement by the deformation of material, it is characterized in simple in construction, manufacturing process is also uncomplicated, have bigger slewing area simultaneously, equivalent stiffness is less, and meet the flatness of the response of LEMs, therefore, no matter at microcosmic or macroscopic arts, LET all has a wide range of application scenarios. for interior LET flexible hinge therein structure as shown in Figure 1, it include bent segments 1, lower bent segments 6, junction fragment 2-1,2-2,2-3,2-4,5 and reverse fragment 4-1,4-2,4-3,4-4, wherein going up bent segments 1, lower bent segments 6 and reverse fragment 4-1,4-2,4-3,4-4 and junction fragment 2-1,2-2,2-3,2-4,5 connect into I-shaped entirety, there is the problem that tensile strength is low in it.

Summary of the invention

The invention provides LET flexible hinge in a kind of tension. It can solve interior LET flexible hinge cannot bear axial tensile loads, the problem that tensile strength is low.

LET flexible hinge in a kind of tension, it includes bent segments, lower bent segments, reverses fragment, junction fragment and stretch-proof fragment, described upper bent segments, lower bent segments are combined in I-shaped structure with reversing fragment respectively through junction fragment, it is characterized in that: be respectively equipped with the stretch-proof fragment parallel with described upper and lower bent segments and junction fragment on the both sides of described I-shaped structure, thus forming T-shaped hollow slots between fragment, junction fragment in described tension fragment and torsion;

It is further characterized by

Described stretch-proof fragment runs through the two ends connecting hinge, consistent with the length of hinge.

Compared with the structure of interior LET flexible hinge, the beneficial effects of the present invention is: it is respectively provided with the stretch-proof fragment parallel with junction fragment and upper and lower bent segments on the both sides of I-shaped structure, thus the ability of flexible hinge axial tensile loads is greatly improved; Meanwhile, the two ends that stretch-proof fragment is connected in tension LET flexible hinge, there is bigger length, there is the bending stiffness having no effect on hinge in it.

Accompanying drawing explanation

Fig. 1 is LET flexible hinge structure schematic diagram in tradition;

Fig. 2 is LET flexible hinge structure schematic diagram in tension.

Detailed description of the invention

See Fig. 2, LET flexible hinge in a kind of tension provided by the invention, it includes bent segments 1, lower bent segments 6, reverse fragment 4-1, 4-2, 4-3, 4-4, junction fragment 2-1, 2-2, 2-3, 2-4, 5 and stretch-proof fragment 3-1, 3-2, upper bent segments 1, lower bent segments 6 and torsion fragment 4-1, 4-2, 4-3, 4-4 is respectively through junction fragment 2-1, 2-2, 2-3, 2-4, 5 are combined into I-shaped structure, the both sides of I-shaped structure be respectively equipped with described on, lower bent segments 1, 6 and junction fragment 2-1, 2-2, 2-3, 2-4, 5 parallel stretch-proof fragment 3-1, 3-2, thus at described tension fragment 3-1, 3-2 and torsion fragment 4-1, 4-2, 4-3, 4-4, T-shaped hollow slots is formed between junction fragment, and stretch-proof fragment 3-1, 3-2 runs through the two ends connecting hinge, consistent with the length of hinge.

It is demonstrated experimentally that the axial compression load that in the tension of the present invention, LET flexible hinge can bear and traditional interior LET flexible hinge are compared and can be improved more than 57.82 times.

Claims

1. LET flexible hinge in a tension, it includes bent segments, lower bent segments, reverses fragment, junction fragment and stretch-proof fragment, described upper bent segments, lower bent segments are combined in I-shaped structure with reversing fragment respectively through junction fragment, it is characterized in that: be respectively equipped with the stretch-proof fragment parallel with described upper and lower bent segments and junction fragment on the both sides of described I-shaped structure, thus forming T-shaped hollow slots between fragment, junction fragment in described tension fragment and torsion.

2. LET flexible hinge in a kind of tension according to claim 1, it is characterised in that: described stretch-proof fragment runs through the two ends connecting hinge, consistent with the length of hinge.