CN1590966A

CN1590966A - Displacement amplifying mechanism

Info

Publication number: CN1590966A
Application number: CN 03156238
Authority: CN
Inventors: 辛洪兵; 郑伟智; 倪林
Original assignee: 辛洪兵
Priority date: 2003-09-02
Filing date: 2003-09-02
Publication date: 2005-03-09

Abstract

The present invention provides a displacement magnification mechanism. It includes base body and at least one lever, the pivot of the described is an dlastic element, the displacement input end and displacement output end of the lever are connected by means of elastic element, The lever displacement magnification muchanism provided by said invention can avoid mechanical gap and friction, and has the advantages of simple structure, small volume, low displacement loss, high magnification efficiency, rapid response, high accuracy and easy manufacture, ect.

Description

Displacement amplifying mechanism

Technical field

The present invention relates to a kind of displacement amplifying mechanism, particularly a kind of according to lever displacement amplification principle, the displacement amplifying mechanism that designs in conjunction with elastic hinge.

Background technology

Accurate manufacturing and precision positioning technology have proposed more and more higher requirement to plant equipment, development along with new material technology, people have worked out and can produce micrometric displacement, and response speed is fast, power output is big, drive that the high electricity of precision causes, magnetostriction functional material such as piezoelectric ceramics, Rare-Earth Magnetic are stretched function telescopic materials such as material and marmem, but its drive displacement is less, so when utilizing functional material to position merely, the drive displacement amount often is difficult to reach requirement.When using, what have must have corresponding displacement amplification device, and can't avoid gap and friction between machinery, the amplification effect that can't realize ideal with traditional mechanism.

Summary of the invention

The purpose of this invention is to provide a kind of displacement amplifying mechanism, this mechanism can obtain bigger displacement enlargement factor, and displacement loss is very little, amplifies the efficient height, and volume is little, the response fast, the precision height.

For achieving the above object, the present invention by the following technical solutions: it comprises matrix, at least one lever a kind of displacement amplifying mechanism, and the fulcrum of described lever is that flexible member connects, and the displacement input end of lever, output terminal are flexible member and connect.

Described flexible member can be elastic hinge or corrugated tube or corrugated plate or elastic sheet.

The displacement input end of described lever, lever, the displacement output terminal of lever are the lever that forms behind the matrix upper cut, the displacement input end of lever, the displacement output terminal of lever, and described fulcrum is the fulcrum that direct otch forms on matrix.

Described otch is a single or double.Described otch be shaped as circle or ellipse or rectangle concave shape etc.

When the very big displacement enlargement factor of needs, can be combined as multistage displacement amplifying mechanism with organizing leverage more.Multistage displacement amplifying mechanism can be 2,3,4,5,6 grades etc.

The lever input end is equipped with driving element such as the piezoelectric ceramics that the displacement input can be provided, rare earth alloy and marmem etc.

Advantage of the present invention:

Lever displacement amplifying mechanism provided by the invention has been avoided mechanical clearance and friction, and have simple in structure, volume is little, displacement loss is little, amplify the efficient height, response is fast, precision is high and be easy to characteristics such as processing.And shifter output terminal on the throne has elastic hinge, makes drive displacement accurate, and force-bearing situation is good.

Description of drawings

Below in conjunction with drawings and embodiments the present invention is described in further detail.

Fig. 1 is lever displacement amplification principle figure;

Fig. 2 is the elastic hinge structure that the direct otch of rigid member is made;

Fig. 3 is that the rigid member room machine connects the elastic hinge structure that elastic sheet is made;

Fig. 4 is the elastic hinge lever structure;

Fig. 5 is a secondary elastic hinge lever structure.

Embodiment

Figure 1 shows that lever amplification principle figure.The input arm of force is a, and the output arm of force is a+b, and the displacement of lever input end is x _I1, the terminal output of lever displacement is y _O1, do not consider the elastic deformation of lever and the influence of hinge, then its theoretical enlargement factor is

λ_{1} = \frac{y_{o 1}}{x_{i 1}} = \frac{a + b}{a}

Figure 2 shows that the elastic hinge structure that the direct otch of rigid member is made.This kerf is a circular arc, can also be other shaped cutout, and otch two ends rigid member can be around the rigidity thin spot rotation of otch.

Figure 3 shows that the rigid member room machine connects the elastic hinge structure that elastic sheet is made.By one group of coupling bolt, 1 usefulness elastic sheet 2 two groups of rigid members 3 are connected.Under external force, rigid member just can lean on the elastic bending deflection of elastic sheet 2 to produce relative rotation.

Figure 4 shows that the elastic hinge lever structure.Lever enlarger input end 7 is equipped with driving element 6, the both ends of the surface gluing that driving element 6 is connected with the lever displacement amplifying mechanism, and carry out pre-stressed joint by pretension bolt 5.In order to guarantee the contact quality of input and output place displacement mechanism and other member, be equipped with an elastic hinge at lever input end 7 and output terminal 4 places.

Figure 5 shows that secondary elastic hinge lever structural drawing, when the single-stage elastic hinge lever is subjected to size restrictions that bigger displacement enlargement factor can't be provided, just two groups of leverage composite design can be become this kind secondary enlarger.Provide displacement by the output terminal of first order lever enlarger 9 for the input end of second level lever enlarger 8, further amplify.The input end of lever 9 and output terminal 11 are equipped with an elastic hinge with the output terminal 12 of lever 8.Mode also can be designed other multistage displacement amplifying mechanism like this.

Claims

1, a kind of displacement amplifying mechanism is characterized in that: it comprises matrix, at least one lever, and the fulcrum of described lever is a flexible member, and the displacement input end of lever, displacement output terminal are flexible member and connect.

2, the described displacement amplifying mechanism of claim 1, it is characterized in that: the displacement input end of described lever, lever, the displacement output terminal of lever are the lever that forms behind the matrix upper cut, the displacement input end of lever, the displacement output terminal of lever, and described fulcrum is the fulcrum that direct otch forms on matrix.

3, according to the described displacement amplifying mechanism of claim 1, it is characterized in that: described flexible member is an elastic hinge.

4, according to the described displacement amplifying mechanism of claim 1, it is characterized in that: described flexible member is corrugated tube or corrugated plate or elastic sheet.

5, according to the described displacement amplifying mechanism of claim 2, it is characterized in that: described otch is a single or double.

6, according to claim 2 or 5 described displacement amplifying mechanisms, it is characterized in that: described otch is circular concave shape or oval concave shape or rectangle concave shape.