Middle driving electric spindle

Abstract

The invention discloses a middle driving electric spindle. The middle driving electric spindle comprises a shell sleeve assembly, two extending sleeves and clamping sleeves, wherein the shell sleeve assembly is provided with through holes, the detachable extending sleeves are fixedly arranged at the two ends of the shell sleeve assembly, the clamping sleeves are embedded in the extending sleeves and used for clamping a work-piece, the surface of the circumference of each clamping sleeve is an oblique plane and abuts the inner wall of the corresponding extending sleeve, and a pull sleeve is connected between the two clamping sleeves; the shell sleeve assembly further comprises a box body and a seat sleeve rotationally connected to the inner portion of the box body, one end of one of the axial directions of the seat sleeve is provided with a control structure driving one of the extending sleeves to move along the axial direction; the outer wall of the other end of the seat sleeve is provided with an annular fixing connection groove, a rotor is sleeved with the fixing connection groove, and one end of the rotor abuts the side wall of the fixing connection groove; the other end of therotor abuts a water-proof ring in sleeved connection with the seat sleeve; a stator corresponding to the rotor is fixedly arranged in the box body; a driving structure is built-in, so that the structure is more compact, the transmission loss is reduced, the sealing effect of a spindle structure is effectively improved, and the service life of the spindle is greatly prolonged.

Description

technical field [0001] The invention relates to a bidirectional lathe spindle, in particular to a middle-drive electric spindle. Background technique [0002] The double-head lathe is one of the most widely used lathes in machinery manufacturing and assembly factories. The difference from traditional lathes is that it can simultaneously perform product turning on both sides of the workpiece. [0003] A kind of numerically controlled double-head lathe disclosed by the Chinese patent whose authorization publication number is CN105665749A. [0004] Compared with traditional machine tools, the function of double-head turning is mainly realized by the bidirectional spindle that can be clamped in the middle of the workpiece. [0005] Existing two-way main shaft is as shown in the Chinese patent that authorized publication number is CN105014451A, discloses a kind of wedge-push type double-headed car bi-directional main shaft chuck, comprises main shaft, retaining ring, wedge push ...

AI Technical Summary

Problems solved by technology

[0006] Its power is mainly driven by the external motor and belt drive through the seat of the two-way spindle to drive the rotating part inside the spindle; but this external drive structure takes up a lot of space and is easy to cause damage to other structures. Interference is not conducive to the development of precision and refinement of double-head lathes. Second, due to the interference of its belt drive structure, the two clamping heads will be divided, which is not easy to form linkage. Even if linkage can be achieved, the structure is to avoid It must be designed very complicated, which is not conducive to the improvement of accuracy and stability; third, due to the penetration of the belt, the sealing performance of its structure is not very good, and the internal structure is easily polluted

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