An Eccentric Sleeve and Large Load Coaxial Microscope with Coarse and Fine Adjustments

Abstract

The invention relates to an eccentric sleeve used in a heavy load rough-fine adjustment coaxial microscope. The eccentric sleeve is provided with two or more than two opened grooves along the radial direction, and the opened grooves are used for installation of a shaft gear. The shaft gear penetrates through the eccentric sleeve, and adjusting nuts are arranged at one end of the eccentric sleeve and used for adjusting tightening and loosening of the opened grooves. The heavy load rough-fine adjustment coaxial microscope comprises the eccentric sleeve. An opened-groove structure is adopted in the eccentric sleeve and used for changing clamping force on the shaft gear by the eccentric sleeve in the mode matching with the adjusting nuts, consequently friction force between the eccentric sleeve and the shaft gear can be changed, and therefore hand feel of a hand wheel can be adjusted. With the method, the clamping force on the shaft gear is greatly improved compared with the prior art, load of a rough-fine coaxial adjustment mechanism is improved, and the problem of low load of the rough-fine coaxial adjustment mechanism is solved. In addition, a focusing mechanism is long in stroke, compact in structure and small in occupied space, low cost manufacturing can be achieved, and therefore the eccentric sleeve can be used in small-scale tools like microscopes.

Description

technical field [0001] The invention relates to a coarse and fine adjustment coaxial microscope, more specifically, an eccentric sleeve for a large load coarse and fine adjustment coaxial microscope, and a large load coarse and fine adjustment coaxial microscope. Background technique [0002] With the continuous development of the economy, the workload also increases; in the field of microscope application, the microscope is required to be more and more high-quality and high-performance, and the coarse and fine coaxial focusing mechanism in the microscope is indispensable. The micro-coaxial focusing mechanism brings a simple and fast operation method, and the operator does not feel tired after long-term use, which greatly improves the working conditions. [0003] The gear-type focusing mechanism on the coaxial of the coarse and fine handwheels is usually the technical solution provided in the second volume of the "Optical Technology Handbook", such as figure 1 Shown: When t...

AI Technical Summary

Problems solved by technology

[0009] The technical solution of the above-mentioned utility model achieves the required focusing speed through the structure of planetary steel ball and end face cam. This structure adds a compression spring and an adjustment handwheel inside the coarse adjustment handwheel, and changes the pressure spring pairing through the focus adjustment handwheel. Coarsely adjust the pressure of the handwheel to achieve adjustable handwheel tension. This structure has a short focusing stroke, which is prone to defects such as steel ball slipping and wear after long-term use, and the compression spring is prone to fatigue failure and other defects.

[0010] The typical structure of coarse and fine coaxial focusing includes a worm gear type coarse and fine coaxial focusing, such as figure 2 Shown: The worm and the worm gear are placed staggered at 90° in space. This structure requires high cost and large structural space. It is usually only suitable for large tools and inspection microscopes. In many microscopes, low manufacturing cost and compact structure are required.

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