CN104912915A

CN104912915A - LEMs (Lamina Emergent Mechanisms) tensile flexible hinge

Info

Publication number: CN104912915A
Application number: CN201510330239.XA
Authority: CN
Inventors: 曹毅; 刘凯; 王强; 葛姝翌; 丁锐; 周辉
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2015-06-16
Filing date: 2015-06-16
Publication date: 2015-09-16
Anticipated expiration: 2035-06-16
Also published as: CN104912915B

Abstract

The invention provides an LEMs (Lamina Emergent Mechanisms) tensile flexible hinge, aiming at solving the problem that the traditional flexible hinge structure only can bear small axial load and is low in tensile strength. The LEMs tensile flexible hinge comprises an upper stretching segment, a lower stretching segment, a left stretching torsion segment and a right stretching torsion segment, wherein two ends of the upper stretching segment and the lower upper stretching segment are respectively connected with the left stretching torsion segment and the right stretching torsion segment through connecting segments to form a cross-shaped whole body. The LEMs tensile flexible hinge is characterized in that a central stretching segment parallel to the connecting segments is further arranged between the upper stretching segment and the lower upper stretching segment, so that vertical hollow-out grooves are respectively formed at two sides of the central stretching segment.

Description

LEMs tension flexible hinge

Technical field

The present invention relates to LEMS flexible hinge structure field, be specially LEMs tension flexible hinge.

Background technique

Lamina Emergent Mechanisms (LEMs) a kind of manufactures from planar materials, and can manufacture the mechanical device of plane by emersion.This kind of mechanical device realizes required motion by making flexible position distortions, is therefore a kind of compliant mechanism.LEMs, while having other compliant mechanism advantages, can adopt the processing technology (as shearing, punching, blanking etc.) that cost is lighter.The flatness of the response of LEMs makes it also have superiority in storage and cost of transportation.

The research direction of Chinese scholars mainly concentrates on the exploitation of LEMs kinematic pair and the research of driving mode.The people such as Jacobsen devise a kind of joint---LET(Lamina Emergent Torsion comparatively conventional at present), this joint is a kind of compliant members being similar to hinge, be different from hinge and obtain motion by rotating the surface moved relative to each other, submissive joint obtains required motion by the distortion of material, be characterized in that structure is simple, manufacturing process is also uncomplicated, have larger 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.Traditional flexible hinge structure as shown in Figure 1, it comprise stretching fragment 1, under connect stretch fragment 8 and left side stretch reverse fragment 11, right side stretches and reverses fragment 12, wherein go up stretching fragment 1, lower stretching fragment 8 and left side stretch reverse fragment 11, right side stretches and reverses that to connect into " ten " font respectively by junction fragment 2,6 between fragment 12 overall, its thrust load that can bear is less, and it can produce related motion when load is larger thus affect kinematic accuracy.

Summary of the invention

The invention provides LEMs tension flexible hinge, it can solve the problem that thrust load is less, tensile strength is low that conventional flex hinge structure can bear.

LEMs tension flexible hinge, it comprises stretching fragment, lower stretching fragment, left side stretch reverses fragment and right side and stretches and reverse fragment, the two ends of described upper stretching fragment, lower stretching fragment respectively by junction fragment and left side stretch reverse fragment, right side stretches and reverses fragment and connect in criss-cross entirety, it is characterized in that: stretching between fragment with lower stretching fragment on described is also provided with the central authorities stretching fragment parallel with described junction fragment, thus forms vertical hollow slots respectively in described central stretching fragment both sides.

It is further characterized in that:

Described left side stretches and reverses fragment, right lateral position is stretched to reverse in fragment and had horizontal hollow slots, and described horizontal hollow slots is communicated with the T-shaped hollow slots of formation two along described central stretching fragment mirror symmetry with described vertical hollow slots;

Described left lateral position is stretched and is reversed fragment and be separated into that fragment is reversed in upper left, Zola stretches fragment and fragment is reversed in lower-left by the stretch horizontal hollow slots of reversing fragment of described left side;

Described right lateral position is stretched torsion fragment and is separated into upper right torsion fragment, right stretching fragment and bottom right torsion fragment by the horizontal hollow slots of described right side stretching torsion fragment.

Compared with conventional flex hinge structure, beneficial effect of the present invention is: it is also provided with the central authorities' stretching fragment paralleled with junction fragment between upper stretching fragment, lower stretching fragment, thus substantially increases the ability that flexible hinge bears axial tension load; Simultaneously, original left side stretches and reverses fragment by it, right side stretches, and torsion fragment is set to Openworks shape, being the flexural rigidity in order to suitably reduce tension flexible hinge, reducing the impact on tension flexible hinge flexural rigidity because of the setting of central authorities' stretching fragment as far as possible.

Accompanying drawing explanation

Fig. 1 is conventional flex hinge structure schematic diagram;

Fig. 2 is invention flexible hinge structure schematic diagram.

Embodiment

See Fig. 2, LEMs tension flexible hinge of the present invention, it comprises stretching fragment 1, lower stretching fragment 8, left side stretch reverses fragment and right side and stretches and reverse fragment, the two ends of upper stretching fragment 1, lower stretching fragment 8 respectively by junction fragment 2,6 and left side stretch reverse fragment, right side stretches and reverses fragment and connect in criss-cross entirety, also be provided with between upper stretching fragment 1 with lower stretching fragment 8 and junction fragment 2,6 parallel central authorities' stretching fragments 7, thus form two vertical hollow slots 9-1,9-2 respectively in central authorities' stretching fragment 7 both sides.

Left side stretches and reverses fragment and have the horizontal hollow slots 10-1, the right lateral position that are communicated with vertical hollow slots 9-1 and stretch and reverse fragment and have the horizontal hollow slots 10-2 be communicated with vertical levels hollow slots 9-2, and horizontal hollow slots 10-1 is communicated with the T-shaped hollow slots that formed and horizontal hollow slots 10-2 and is communicated with the T-shaped hollow slots that formed with vertical hollow slots 9-2 along central stretching fragment 7 mirror symmetry with vertical hollow slots 9-1; Left side stretches and reverses the horizontal hollow slots 10-1 of fragment and stretched by left lateral position and reverse fragment and be separated into that fragment 3-1 is reversed in upper left, Zola stretches fragment 4-1 and fragment 5-1 is reversed in lower-left; Right side stretches and reverses the horizontal hollow slots 10-2 of fragment and stretched by right lateral position and reverse fragment and be separated into upper right and reverse fragment 3-2, right stretching fragment 4-2 and fragment 5-2 is reversed in bottom right.

Experiment proves, the axial anti-stretching load that LEMs tension flexible hinge of the present invention can bear and traditional flexible hinge are compared and can be improved about 6 times.

Claims

1.LEMs tension flexible hinge, it comprises stretching fragment, lower stretching fragment, left side stretch reverses fragment and right side and stretches and reverse fragment, the two ends of described upper stretching fragment, lower stretching fragment respectively by junction fragment and left side stretch reverse fragment, right side stretches and reverses fragment and connect in criss-cross entirety, it is characterized in that: stretching between fragment with lower stretching fragment on described is also provided with the central authorities stretching fragment parallel with described junction fragment, thus forms vertical hollow slots respectively in described central stretching fragment both sides.

2. LEMs tension flexible hinge according to claim 1, it is characterized in that: described left side stretches and reverses fragment, right lateral position is stretched to reverse in fragment and had horizontal hollow slots, and described horizontal hollow slots is communicated with the T-shaped hollow slots of formation two along described central stretching fragment mirror symmetry with described vertical hollow slots.

3. the tension flexible hinge of LEMs according to claim 2, is characterized in that: described left lateral position is stretched and reversed fragment and be separated into that fragment is reversed in upper left, Zola stretches fragment and fragment is reversed in lower-left by the stretch horizontal hollow slots of reversing fragment of described left side; Described right lateral position is stretched torsion fragment and is separated into upper right torsion fragment, right stretching fragment and bottom right torsion fragment by the horizontal hollow slots of described right side stretching torsion fragment.