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Planet scale division cam structure

An indexing cam and planetary gear technology, applied in mechanical equipment, belt/chain/gear, transmission, etc., can solve the problem that the indexing cam mechanism cannot achieve large indexing and high precision at the same time, the rotational inertia of the driven disc is large, and the application range limitation and other issues, to achieve the effect of light weight, small size and lower product cost

Inactive Publication Date: 2003-04-30
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

Due to the use of space cams and the use of special equipment, the arc surface indexing cam mechanism has a high manufacturing cost; and due to structural limitations, its indexing number is generally selected between 2 and 12
Although the cylindrical indexing cam mechanism can achieve a large indexing number, the moment of inertia of the driven plate is also large when the indexing number is large, which is not suitable for high-speed operation, so the application range of this type of mechanism is still limited to a certain extent
Therefore, the existing indexing cam mechanism has the problem of being unable to simultaneously realize large indexing number and high precision and high manufacturing cost

Method used

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the implementation of the present invention is described in detail as follows:

[0021] exist figure 1 Among them, the planetary indexing cam mechanism is set as a planetary transmission structure, and the cam-pin wheel motion pair in this mechanism is set as an inner cam 1-outer pin wheel 2 (type I structure). The needle teeth are evenly distributed on the outer needle wheel 2 according to the angle of the division number, and the inner cam 1 is provided with special-shaped tooth profiles determined according to the division number and other factors.

[0022] The outer needle wheel 2 is fixed, and the inner cam 1 rotates with the constant speed of the input shaft, and at the same time, under the action of the outer needle wheel 2, it makes an absolute rotation around its own axis. During this absolute rotation, according to the teeth of the inner cam 1 The profile realizes intermittent motion according to a certain motio...

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Abstract

The invented planetary scale division cam mechanism includes input shaft, output shaft and cam-pinwheel pair. The planetary scale division cam mechanism is designed as planetary drive mechanism, the motion mechanism in cam-pinwheel pair is that is planet, the tooth on pin wheel is equipartition distributed according to the angle of planetary scale division, irregular tooth prifile line is set on cam wheel according to scale division number, the fixing mechanism in cam-pin wheel pair, is central wheel; the cam-pin wheel pair implements intermittent rotation motion. It advantages are large scale division number, small volume, light weight, common shaft of input and output, it can replace cylindrical scale division cam mechanism or internal meshing parallel scale division cam mechanism.

Description

technical field [0001] The invention belongs to machinery, and in particular relates to a planetary indexing cam mechanism. Background technique [0002] At present, the known indexing cam mechanism adopts the cam mechanism to realize intermittent motion, and is widely used in various multi-station automatic machines and stepping machines, and is a key component in these automatic machines. Its indexing cam mechanism includes three types, namely parallel indexing cam mechanism, arc surface indexing cam mechanism and cylindrical indexing cam mechanism. Due to the structural limitations of the external meshing parallel indexing cam mechanism, it is difficult for the number of indexing to exceed 8-12. Due to the use of space cams and the use of special equipment, the arc surface indexing cam mechanism has a high manufacturing cost; and due to structural limitations, its indexing number is generally selected between 2 and 12. Although the cylindri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H37/12
Inventor 张策杨玉虎王皓刘明涛
Owner TIANJIN UNIV
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