High-precision motorized spindle structure

Abstract

A high-precision electric spindle structure comprises a spindle, a front bearing, a sleeve, an outer stator, an inner rotor, a water inlet, a water outlet, a rear bearing and a spindle cooling hole, and is characterized in that the spindle cooling hole is formed in the middle of the spindle, the sleeve is arranged outside the spindle, and the outer stator and the inner rotor are mounted between the sleeve and the spindle; cooling of the motorized spindle is completed through the water inlet, the water outlet and the spindle cooling hole, vibration of a machine tool is relieved, rotating precision of the spindle is improved, and machining precision of the machine tool is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric spindle, concretely is a kind of high-precision electric spindle structure. BACKGROUND

[0002] At present, for the rotation and transmission of main shaft, motor drives belt or chain transmission is used before, due to the motor is far from main shaft, when rotating, it will make main shaft appear larger vibration, and main shaft thermal deformation is larger, it is not conducive to the high-precision machining of machine tool. SUMMARY

[0003] The utility model solves above-mentioned technical scheme that the technical scheme is taken: a kind of high-precision electric spindle structure is formed by main shaft, front bearing, sleeve, outer stator, inner rotor, water inlet, water outlet, rear bearing, main shaft cooling hole, its characterized in that: the main shaft is horizontally placed, and the main shaft cooling hole is equipped in the middle of main shaft, and sleeve is equipped in the outside of main shaft, and water inlet and water outlet are equipped on sleeve, and front bearing is equipped in the inside left end of sleeve, and rear bearing is equipped in the inside right end, the outer stator is installed in the inside middle position of sleeve, and outer stator is fixed together with sleeve and does not rotate, and inner rotor is installed in the inside of outer stator, and inner rotor is fixed together with main shaft and can rotate together.

[0004] The utility model because of adopting above-mentioned structure, after using high-precision electric spindle structure, the vibration of machine tool is reduced, the rotation accuracy of main shaft is improved, and the machining accuracy of machine tool is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0005] Figure 1 It is the structure front view of the utility model;

[0006] Marked in the figure as:1.main shaft, 2.front bearing, 3.sleeve, 4.outer stator, 5.inner rotor, 6.water inlet, 7.water outlet, 8.rear bearing, 9.main shaft cooling hole. DETAILED DESCRIPTION

[0007] The utility model is further described as follows in connection with the attached drawing:

[0008] As Figure 1The utility model relates to a high-precision motorized spindle structure, which is composed of a spindle 1, a front bearing 2, a sleeve 3, an outer stator 4, an inner rotor 5, a water inlet 6, a water outlet 7, a rear bearing 8, and a spindle cooling hole 9, characterized in that the spindle 1 is horizontally placed, the spindle cooling hole 9 is arranged in the middle of the spindle 1, the sleeve 3 is arranged outside the spindle 1, the water inlet 6 and the water outlet 7 are arranged on the sleeve 3, the front bearing 2 is arranged at the left end inside the sleeve 3, the rear bearing 8 is arranged at the right end inside the sleeve 3, the outer stator 4 is installed at the middle position inside the sleeve 3, the outer stator 4 is fixed with the sleeve 3 and does not rotate, the inner rotor 5 is installed inside the outer stator 4, and the inner rotor 5 is fixed with the spindle 1 and can rotate together.

[0009] When the spindle 1 needs to be started, cooling water is first introduced into the water inlet 6, the cooling water starts to flow along the cavity between the outer stator 4 and the sleeve 3, and then the cooling water is introduced into the spindle cooling hole 9, the cooling water flows from the rear part to the front part of the spindle 1, at this time, the spindle 1 is started, the inner rotor 5 starts to rotate under the magnetic field action of the outer stator 4, the heat generated when the spindle 1 rotates is carried away from the motorized spindle by the cooling water in the water inlet 6 and the water outlet 7 arranged on the sleeve 3, and the cooling water in the spindle cooling hole 9 arranged on the spindle 1 carries away part of the heat generated by the inner rotor 5, the cooling water carried away is used for grinding cooling, so that the rotation accuracy of the motorized spindle and the machining effect are improved, and the machining accuracy of the machine tool is guaranteed.

[0010] The utility model adopts the high-precision motorized spindle structure, reduces the vibration of the machine tool, improves the rotation accuracy of the spindle, and further improves the machining accuracy of the machine tool.

Claims

1. A high-precision motorized spindle structure, comprising a spindle, a front bearing, a sleeve, an outer stator, an inner rotor, a water inlet, a water outlet, a rear bearing and a spindle cooling hole, characterized in that: The main shaft is horizontally placed, the main shaft cooling hole is arranged in the middle of the main shaft, the sleeve is arranged outside the main shaft, the water inlet and the water outlet are arranged on the sleeve, the front bearing is arranged at the left end inside the sleeve, and the rear bearing is arranged at the right end inside the sleeve, the outer stator is arranged at the middle position inside the sleeve, the outer stator is fixed with the sleeve and does not rotate, and the inner rotor is arranged inside the outer stator, the inner rotor is fixed with the main shaft and can rotate together.

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