Precision rotation positioning platform based on compliant mechanism
A technology of flexible mechanism and positioning platform, which is applied to the parts of instruments and instruments, etc., can solve the problems that the rigid rotating platform cannot meet the requirements, maintenance is difficult, and the cost is high, so as to achieve good versatility and practical value, simple maintenance and low cost. low effect
Inactive Publication Date: 2010-05-19
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
With the development of precision positioning technology, there are higher requirements for the positioning accuracy of the rotary positioning platform. The positioning accuracy of the platform is required to reach the micro-radian level, and the traditional rigid rotary platform is difficult to meet the requirements.
At present, the more commonly used method of using piezoelectric ceramics to directly drive the flexible precision positioning platform can achieve high positioning accuracy, but it is expensive, expensive, and difficult to maintain.
Method used
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Embodiment Construction
[0012] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing of description:
[0013] as attached figure 1 As shown, the precision rotary positioning platform based on the compliance mechanism includes a base 1, a motion platform 3, a guide mechanism 2, and two sets of driving devices. Among the two groups of driving devices, one group is composed of a telescopic brake 4, a fixing member 5, two balls 7, 9 and a spring 8; the other group is composed of a telescopic brake 10, a fixing member 11, two balls 13, 15 and a spring 14 composition. Two opposite sides of the base 1 are respectively provided with a round hole, such as the round hole 6 and the round hole 12 in the figure, which are used to install two groups of driving devices; the two groups of driving devices are distributed on the two opposite sides of the motion platform 3, and Misalignment distribution; in one group of driving devices, two balls 7, ...
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The precious rotary positioning platform comprises a base, a moving platform, a guiding mechanism and two groups of driving device. The said base, moving platform and guiding mechanism are processed from a block of material and made into an integrally assembled compliance mechanism. At the two opposite sides of the base is provided respectively with a circular hole for mounting two groups of driving mechanisms which are arranged at the two opposite sides of the moving platform and staggered each other. In any one group of driving device there are two balls and a spring are provided in the saidcircular holes. An extending brake is fixed on the base through a fixing member. The forehead of the extending brake compresses tightly the ball which compresses tightly the spring which compressestightly another ball which compresses tightly the moving platform. Advantage: obtained high-precision output under low-precision input, simple control and operation of platform and low cost.
Description
technical field [0001] The invention relates to a precision rotary positioning platform based on a compliant mechanism, in particular to a compliant precision positioning platform capable of finely adjusting the angle of rotation around a Z axis. Background technique [0002] At present, the rotary positioning platform is usually driven by a motor, or driven by a worm gear and a worm screw. The center of this platform usually has a shaft, and the worktable rotates around the shaft under the drive of an external force. Since these platforms are all rigid mechanisms, there is a certain fit gap, and the rotation accuracy can generally only reach the milliradian level. With the development of precision positioning technology, there are higher requirements for the positioning accuracy of the rotary positioning platform. The positioning accuracy of the platform is required to reach the micro-radian level, and the traditional rigid rotary platform is difficult to meet the requireme...
Claims
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IPC IPC(8): G12B5/00
Inventor 张宪民王华洪始良
Owner SOUTH CHINA UNIV OF TECH