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Worm gear structure concurrently serving as limiting mechanism

A technology of limit mechanism and worm gear, which is applied in the field of uranium enrichment, can solve the problems of high machining precision and difficult manufacturing of end cover bosses, so as to save the use of precious metals, save processing man-hours, and facilitate assembly

Inactive Publication Date: 2017-12-08
CNNC SEVENTH RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the machining accuracy of the boss on the end cover is high, which brings difficulties to the processing and manufacturing

Method used

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  • Worm gear structure concurrently serving as limiting mechanism
  • Worm gear structure concurrently serving as limiting mechanism
  • Worm gear structure concurrently serving as limiting mechanism

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 As shown in -3, the worm gear structure that doubles as a limit mechanism of the present invention includes a casing 1, an adjustment screw 2, a worm wheel 3, a worm screw 4, and an end cover 5;

[0019] The box body 1 is a steel casting. The right half of the structure is a hollow cylindrical structure, and the left half is a special-shaped hollow cylindrical structure. The space between the left half and the right half is staggered at 90°. The upper part of the left half is connected to the end cover 5 by bolts. , the lower part connects other components. The worm wheel 3 is arranged on the left half of the box body 1, and the worm 4 is arranged on the right half, and at the same time, it can be ensured that the worm wheel 3 and the worm 4 are in an meshing state. The special-shaped structure of the left half of th...

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Abstract

The invention belongs to the technical field of uranium enrichment, and particularly relates to a worm gear structure concurrently serving as a limiting mechanism. The left half part and the right half part of a box are each of a hollow cylindrical structure and are staggered by 90 degrees in space, the upper portion of the left half part is connected with an end cover, the left half part of the box is provided with a worm gear, the right half part of the box is provided with a worm, and the worm gear and the worm are in a meshed state; the front outer wall and the back outer wall of the high portion in the center of the worm gear on the upper portion of the left half part of the box each extend outwards to form a boss plane tangent to the cylindrical structure, that is to say, the two boss planes protrude in the cylindrical structure; the two boss planes are each provided with an adjusting bolt, the height of the centers of the adjusting bolts is consistent with the thickness of the center of the worm gear, that is to say, the adjusting bolts can touch the worm gear when the worm gear rotates, the rotating angle of the worm gear is limited by the positions of the adjusting bolts, and then limiting on the valve opening and closing angle is achieved. According to the worm gear structure, valve opening and closing can be effectively achieved, the transmission requirement is met, and the problem about limiting of the opening and closing angle is solved.

Description

technical field [0001] The invention belongs to the technical field of uranium enrichment, and in particular relates to a worm gear structure which doubles as a limiting mechanism. Background technique [0002] The drum vacuum valve used in the uranium enrichment system uses a gear and worm gear transmission system to drive the valve core to open and close within a specified time. When it is opened and closed, a limit device is required to control the opening and closing angle of the valve. The main function of the worm gear assembly is to reduce the speed and change the transmission direction. The limit device is usually a boss provided on the end cover connected with the box body, a support is installed on the coaxial, and two adjustment screws are arranged at both ends of the support. When the valve is opened, one adjustment screw on the support touches one side of the boss, and when the valve is closed, the other adjustment screw on the support touches the other side of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/16
CPCF16H1/16
Inventor 吴刚殷亚芳刘洋范国伟薛光磊罗玉英郝耀红
Owner CNNC SEVENTH RES & DESIGN INST CO LTD
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