Parallel 3-DOF drive mechanism of spindle head

A driving mechanism and degree-of-freedom technology, which is applied to driving devices, metal processing mechanical parts, large fixed members, etc., can solve the problems of complex design of machine tool structural parts, high cost, flexibility and reduced structural rigidity, etc., to achieve simple structure and cost. Effects of low, low motion quality

Active Publication Date: 2009-11-18
TSINGHUA UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, the high flexibility of the 3-PRS mechanism reduces the structural rigidity, making the design of machine tool structural components complex and costly

Method used

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  • Parallel 3-DOF drive mechanism of spindle head

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Embodiment Construction

[0010] The present invention provides a parallel three-degree-of-freedom spindle head driving mechanism. The present invention will be further described in conjunction with the accompanying drawings and specific embodiments below.

[0011] figure 1 It is a structural schematic diagram of an embodiment of the present invention. Three driving and moving pairs 2 distributed according to the apex positions of an equilateral triangle are installed on the fixed platform 1; each driving and moving pair 2 is connected with an input rod 8, and the input rod 8 is driven by the driving and moving pair 2; The other end is connected to the ball hinge 7, and is connected to the connecting slider 3 through the ball hinge 7; the equilateral triangle dynamic platform 5 is provided with 3 evenly arranged passive moving pairs 6, the passive moving pair 6 is a chute, and the 3 connecting sliders 3 They are respectively installed in the chute of the passive moving pair 6, and can move horizontall...

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Abstract

The invention belongs to the mechanical manufacture field and relates to a parallel 3-DOF drive mechanism of a spindle head. A fixed platform is provided with 3 drive moving pairs distributed according to the position of the apex of an equilateral triangle; each drive moving pair is connected with an input member bar which is driven by the drive moving pair; the other end of the input member bar is connected with a globe hinge and is connected with link blocks via the globe hinge; a movable platform is provided with 3 uniformly aligned driven moving pairs which are chutes; 3 link blocks are respectively installed in the chutes of the driven moving pairs and can move horizontally in the chutes; a spindle is arranged in the central position of the movable platform. By adopting parallel structure, the drive mechanism obviously improves the rigidity of the spindle head structure; in addition, the drive mechanism has the characteristics of having small movement mass, good dynamic property and high movement precision, moving and decoupling along the moving direction, and is suitable for independent working and combined machining in coordination with other devices.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a parallel three-degree-of-freedom spindle head drive mechanism that can work independently and cooperate with other devices for composite processing. Background technique [0002] Since the 1980s, five-axis linkage CNC milling machines have been widely used in aviation, aerospace, shipbuilding, power generation equipment and other fields. Coupled with the swing fork or universal spindle head, the two rotary motions of A-axis / C-axis or A-axis / B-axis are realized to form a five-axis linkage CNC machine tool. Although the spindle deflection angle of the swing fork or universal spindle head is relatively large, it can realize five-sided machining of rectangular parts. Although the spindle head can achieve high rotation speed and acceleration on a single axis, the tool space orientation speed is still low. Because the two rotary motions of the spindle head are connected in seri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q5/02B23Q1/48B23C9/00
Inventor 王立平汪劲松关立文黄鹏姚蕊
Owner TSINGHUA UNIV
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