阅读说明：本技术 一种采用非对称转化铰链的大承载式压电粘滑旋转台 (Large-bearing piezoelectric stick-slip rotating table adopting asymmetric transformation hinge ) 是由 卢晓晖 徐毓鸿 张晓松 乔广达 程廷海 高强 于洋 王宇琦 于 2019-09-27 设计创作，主要内容包括：一种采用非对称转化铰链的大承载式压电粘滑旋转台,旨在解决现有压电粘滑旋转台铰链结构复杂、旋转范围小、承载能力弱等问题。本发明包括转台、轴承、支撑圆筒、圆筒固定螺栓、驱动组件固定螺栓、驱动组件和底台,轴承内圈与转台过盈配合,轴承外圈与支撑圆筒过盈配合,驱动组件通过驱动组件固定螺栓固定安装在底台上,驱动组件与转台下端部接触,支撑圆筒通过圆筒固定螺栓固定安装在底台上。本发明采用的非对称转化铰链为中心对称结构,由于铰链刚度分布不均,使非对称转化铰链产生收缩斜向位移,夹紧转台并产生扭矩使转台旋转。本发明具有结构简单、旋转范围大、承载能力强、定位精度高等特点,在微纳精密驱动与定位领域具有广泛的应用前景。(a large-bearing piezoelectric stick-slip rotating platform adopting an asymmetric transformation hinge aims to solve the problems that the existing piezoelectric stick-slip rotating platform is complex in hinge structure, small in rotating range, weak in bearing capacity and the like. The invention comprises a rotary table, a bearing, a supporting cylinder, a cylinder fixing bolt, a driving assembly and a bottom table, wherein the inner ring of the bearing is in interference fit with the rotary table, the outer ring of the bearing is in interference fit with the supporting cylinder, the driving assembly is fixedly arranged on the bottom table through the driving assembly fixing bolt, the driving assembly is in contact with the lower end part of the rotary table, and the supporting cylinder is fixedly arranged on the bottom table through the cylinder fixing bolt. The asymmetric transformation hinge is a centrosymmetric structure, and due to the fact that rigidity of the hinge is unevenly distributed, the asymmetric transformation hinge generates contraction oblique displacement, clamps the rotary table and generates torque to enable the rotary table to rotate. The micro-nano precise positioning device has the characteristics of simple structure, large rotation range, strong bearing capacity, high positioning precision and the like, and has wide application prospect in the field of micro-nano precise driving and positioning.)

1. a large-bearing piezoelectric stick-slip rotating platform adopting an asymmetric transformation hinge is characterized by comprising a rotating platform (1), a bearing (2), a supporting cylinder (3), a bottom platform (4), a driving assembly fixing bolt (5), a driving assembly (6) and a cylinder fixing bolt (7); the bearing (2) inner ring is in interference fit with the rotary table (1), the bearing (2) outer ring is in interference fit with the supporting cylinder (3), the driving assembly (6) is fixedly installed on the bottom table (4) through the driving assembly fixing bolt (5), the driving assembly (6) is in contact with the lower end of the rotary table (1), and the supporting cylinder (3) is fixedly installed on the bottom table (4) through the cylinder fixing bolt (7).

2. The large-bearing piezoelectric stick-slip rotating table adopting the asymmetric transformation hinge is characterized in that the rotating table (1) comprises a circular table (1-1), a bearing upper limiting surface (1-2) and a rotating column (1-3); the round table (1-1) is arranged in a round table mounting groove (3-2) of the supporting cylinder (3); the upper limit surface (1-2) of the bearing is contacted with the bearing (2); the rotating columns (1-3) penetrate through the supporting cylinder (3) and are in contact with the driving assembly (6).

3. The large-bearing piezoelectric stick-slip rotary table adopting the asymmetric transformation hinge as claimed in claim 1, wherein the bearing (2) comprises a bearing inner ring upper surface (2-1) and a bearing outer ring lower surface (2-2); the upper surface (2-1) of the bearing inner ring is contacted with the upper limit surface (1-2) of the bearing, and the lower surface (2-2) of the bearing outer ring is contacted with the lower limit surface (3-3) of the bearing of the supporting cylinder (3).

4. the large-bearing piezoelectric stick-slip rotating table adopting the asymmetric transformation hinge as claimed in claim 1, wherein the supporting cylinder (3) comprises a rotating hole (3-1), a circular truncated cone mounting groove (3-2), a bearing lower limiting surface (3-3), a cylinder mounting hole (3-4) and a cylinder mounting surface (3-5); the rotating column (1-3) penetrates through the rotating hole (3-1); a circular truncated cone (1-1) is arranged in the circular truncated cone mounting groove (3-2); the lower limiting surface (3-3) of the bearing is contacted with the lower surface (2-2) of the bearing outer ring; a cylinder fixing bolt (7) penetrates through the cylinder mounting hole (3-4); the cylinder mounting surface (3-5) is in contact with a base surface (4-3) of the base (4).

5. The large-bearing piezoelectric stick-slip rotary table adopting the asymmetric transformation hinge as claimed in claim 1, wherein the base table (4) comprises a cylinder mounting threaded hole (4-1), a driving component mounting threaded hole (4-2) and a base table surface (4-3); the cylinder mounting threaded hole (4-1) is in threaded connection with a cylinder fixing bolt (7); the driving component mounting threaded hole (4-2) is in threaded connection with a driving component fixing bolt (5); a support cylinder (3) and a drive assembly (6) are placed on the bottom table surface (4-3).

6. The large-bearing piezoelectric stick-slip rotary table adopting the asymmetric transformation hinge as claimed in claim 1, wherein the driving assembly (6) comprises a loading bolt (6-1), a loading plate (6-2), the asymmetric transformation hinge (6-3), a piezoelectric stack (6-4), a gasket (6-5) and a pre-tightening bolt (6-6); wherein the loading bolt (6-1) is in contact with a loading plate (6-2), and the loading plate (6-2) is installed in a loading plate installation groove (6-3-6) of the asymmetric transformation hinge (6-3); both sides of the piezoelectric stack (6-4) are in contact with the gasket (6-5), and the piezoelectric stack (6-4) is fastened in the asymmetric transformation hinge (6-3) through the pre-tightening bolts (6-6) on both sides.

7. The large-bearing piezoelectric stick-slip rotating platform adopting the asymmetric transformation hinge as claimed in claim 6, wherein the asymmetric transformation hinge (6-3) is a centrosymmetric structure, and the asymmetric transformation hinge (6-3) can be made of 5025 aluminum alloy, 6061 aluminum alloy, 7075 aluminum alloy, Ti-35A titanium alloy or Ti-13 titanium alloy material; the asymmetric conversion hinge (6-3) is provided with an installation platform (6-3-1), an installation hole (6-3-2), a straight beam flexible hinge (6-3-3), a stacking limit platform (6-3-4), an elastic rectangular plate (6-3-5), a loading plate installation groove (6-3-6), a loading threaded hole (6-3-7), a clamp seat (6-3-8), a pre-tightening threaded hole (6-3-9), a straight and round flexible hinge A1 (6-3-101), a connecting beam A (6-3-102), a straight and round flexible hinge A2 (6-3-103), a straight and round flexible hinge B1 (6-3-201), a connecting beam B (6-3-202), A right circular flexible hinge B2 (6-3-203); the mounting table (6-3-1) is in contact with the bottom table (4), and a mounting hole (6-3-2) is formed in the mounting table (6-3-1); a driving component fixing bolt (5) penetrates through the mounting hole (6-3-2); two sides of the stacking limit table (6-3-4) are provided with straight beam flexible hinges (6-3-3), and two ends of each straight beam flexible hinge (6-3-3) are connected with the mounting table (6-3-1) and the stacking limit table (6-3-4); the loading plate (6-2) is arranged in a loading plate mounting groove (6-3-6), and the loading bolt (6-1) is in threaded connection with a loading threaded hole (6-3-7); an elastic rectangular plate (6-3-5) is arranged in front of the loading plate mounting groove (6-3-6), and the elastic rectangular plate (6-3-5) is in contact with the rotating column (1-3); the stacking limiting table (6-3-4) is provided with a pre-tightening threaded hole (6-3-9), and the pre-tightening bolt (6-6) is in threaded connection with the pre-tightening threaded hole (6-3-9); the two sides of the connecting beam A (6-3-102) are respectively provided with a straight-circular flexible hinge A1 (6-3-101) and a straight-circular flexible hinge A2 (6-3-103), the straight-circular flexible hinge A1 (6-3-101) is connected with the stacking limiting table (6-3-4), and the straight-circular flexible hinge A2 (6-3-103) is connected with the clamp seat (6-3-8); the two sides of the connecting beam B (6-3-202) are respectively provided with a straight-circular flexible hinge B1 (6-3-201) and a straight-circular flexible hinge B2 (6-3-203), the straight-circular flexible hinge B1 (6-3-201) is connected with the clamp seat (6-3-8), and the straight-circular flexible hinge B2 (6-3-203) is connected with the stacking limiting table (6-3-4).

Technical Field

The invention relates to a large-bearing piezoelectric stick-slip rotating table adopting an asymmetric transformation hinge, and belongs to the technical field of micro-nano precision driving and positioning.

Background

With the development of science and technology, the demand of the micro/nano-scale driving positioning technology in the advanced technical field at home and abroad is more and more urgent. The piezoelectric driving technology is one of important technologies in the micro/nano driving positioning field, and has the characteristics of small volume, high positioning precision, large stroke, no electromagnetic interference and the like, so that the piezoelectric driving technology has important scientific significance and wide application prospect in the fields of micromachining technology, material science, semiconductor processing, bioengineering and the like.

The piezoelectric rotary table is a precision driving positioning platform which is driven by a piezoelectric driving technology and generates micro/nano-scale motion resolution, and can be applied to the technical fields of ultra-precision machining, large-scale integrated circuit manufacturing, scanning probe microscopy and the like.

Therefore, it is very important to create a piezoelectric stick-slip rotating platform with a simple hinge structure, a large rotating range and a strong bearing capacity.

disclosure of Invention

The invention discloses a large-bearing piezoelectric stick-slip rotating platform adopting an asymmetric transformation hinge, which aims to solve the technical problems of complex structure, small rotating range, weak bearing capacity and the like of the conventional piezoelectric stick-slip rotating platform hinge.

the technical scheme adopted by the invention is as follows:

In order to achieve the purpose, the invention provides a large-bearing piezoelectric stick-slip rotating platform adopting an asymmetric transformation hinge, which consists of a rotating platform, a bearing, a supporting cylinder, a cylinder fixing bolt, a driving assembly and a bottom platform; the bearing inner ring is in interference fit with the rotary table, the bearing outer ring is in interference fit with the supporting cylinder, the driving assembly is fixedly mounted on the base platform through a driving assembly fixing bolt, the driving assembly is in contact with the lower end portion of the rotary table, and the supporting cylinder is fixedly mounted on the base platform through a cylinder fixing bolt.

The rotary table comprises a circular table, a bearing upper limiting surface and a rotary column; the circular truncated cone is arranged in a circular truncated cone mounting groove of the supporting cylinder; the upper limiting surface of the bearing is in contact with the bearing; the rotating column passes through the supporting cylinder to be in contact with the driving assembly.

The bearing comprises an upper surface of a bearing inner ring and a lower surface of a bearing outer ring; the upper surface of the bearing inner ring is in contact with the upper limit surface of the bearing, and the lower surface of the bearing outer ring is in contact with the lower limit surface of the bearing of the supporting cylinder.

the supporting cylinder comprises a rotating hole, a circular truncated cone mounting groove, a lower bearing limiting surface, a cylinder mounting hole and a cylinder mounting surface; the rotating hole penetrates through the rotating column; a circular truncated cone is arranged in the circular truncated cone mounting groove; the lower limiting surface of the bearing is contacted with the lower surface of the bearing outer ring; the cylinder mounting hole penetrates through a cylinder fixing bolt; the cylinder mounting surface is in contact with a bed surface of the bed.

The base table comprises a cylinder mounting threaded hole, a driving assembly mounting threaded hole and a base table surface; the cylinder mounting threaded hole is in threaded connection with the cylinder fixing bolt; the driving component mounting threaded hole is in threaded connection with the driving component fixing bolt; and a supporting cylinder and a driving assembly are arranged on the surface of the bottom table.

The driving assembly comprises a loading bolt, a loading plate, an asymmetric transformation hinge, a piezoelectric stack, a gasket and a pre-tightening bolt; the loading bolt is in contact with a loading plate, and the loading plate is installed in a loading plate installation groove of the asymmetric conversion hinge; the two sides of the piezoelectric stack are both in contact with the gasket, and the piezoelectric stack is fastened in the asymmetric transformation hinge through the pre-tightening bolts on the two sides.

the asymmetric transformation hinge is of a central symmetric structure and can be made of 5025 aluminum alloy, 6061 aluminum alloy, 7075 aluminum alloy, Ti-35A titanium alloy or Ti-13 titanium alloy; the asymmetric conversion hinge is provided with a mounting platform, a mounting hole, a straight beam flexible hinge, a stacking limiting platform, an elastic rectangular plate, a loading plate mounting groove, a loading threaded hole, a clamp seat, a pre-tightening threaded hole, a straight round flexible hinge A1, a connecting beam A, a straight round flexible hinge A2, a straight round flexible hinge B1, a connecting beam B and a straight round flexible hinge B2; the mounting table is in contact with the bottom table, and mounting holes are formed in the mounting table; the mounting hole penetrates through a driving component fixing bolt; two sides of the stacking limit platform are provided with straight beam flexible hinges, and two ends of each straight beam flexible hinge are connected with the mounting platform and the stacking limit platform; the loading plate is arranged in the loading plate mounting groove, and the loading bolt is in threaded connection with the loading threaded hole; an elastic rectangular plate is arranged in front of the loading plate mounting groove and is in contact with the rotating column; the stacking limiting table is provided with a pre-tightening threaded hole, and the pre-tightening bolt is in threaded connection with the pre-tightening threaded hole; the two sides of the connecting beam A are respectively provided with a straight-circular flexible hinge A1 and a straight-circular flexible hinge A2, the straight-circular flexible hinge A1 is connected with the stacking limiting table, and the straight-circular flexible hinge A2 is connected with the clamp seat; the two sides of the connecting beam B are respectively provided with a straight-round flexible hinge B1 and a straight-round flexible hinge B2, the straight-round flexible hinge B1 is connected with the clamp seat, and the straight-round flexible hinge B2 is connected with the stacking limit table.

The invention has the beneficial effects that:

The asymmetric transformation hinge adopted by the invention is provided with the straight round flexible hinge with different radiuses and is symmetrical about the center, so that the rigidity of the asymmetric transformation hinge is unevenly distributed, the asymmetric transformation hinge is contracted and obliquely displaced, the positive pressure of the contact between the driving assembly and the rotary table is adjusted, the friction driving force between the driving assembly and the rotary table is increased, the friction resistance between the driving assembly and the rotary table is reduced, the comprehensive regulation and control of the friction force in the driving process of the piezoelectric stick-slip rotary table are realized, the driving step efficiency of the rotary table is improved, meanwhile, the structural design complexity of the rotary table hinge is reduced due to the adoption of the stick-slip driving principle, the rotating range of the rotary table is enlarged, and the output torque of the rotary table is increased; the rotary table is connected with the supporting cylinder in an interference fit mode through the bearing, the axial bearing capacity of the rotary table is completely transferred to the bottom table, and the bearing capacity of the rotary table is enhanced. The invention has the characteristics of simple structure, large rotation range, strong bearing capacity, high positioning precision, large output thrust and the like, and has good application prospect in the micro-nano precision driving and positioning field of optical precision instruments, semiconductor processing and the like.

drawings

Fig. 1 is a schematic structural diagram of a large-load piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

FIG. 2 is a schematic structural diagram of a turntable of a large-loading piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

FIG. 3 is a schematic view of a bearing structure of a large-bearing piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

FIG. 4 is a schematic view II of a bearing structure of a large-bearing piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

FIG. 5 is a schematic structural diagram of a supporting cylinder of a large-loading piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

FIG. 6 is a schematic structural diagram II of a supporting cylinder of a large-loading piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

FIG. 7 is a schematic structural diagram of a base table of a large-loading piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

FIG. 8 is a schematic structural diagram of a driving assembly of a large-loading piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

FIG. 9 is a schematic structural diagram I of an asymmetric transformation hinge of a large-carrying piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention;

Fig. 10 is a schematic structural diagram ii of an asymmetric transformation hinge of a large-carrying piezoelectric stick-slip turntable using an asymmetric transformation hinge according to the present invention.

Detailed Description