Thin-wall braking sleeve of direct drive rotary table and manufacturing method

Abstract

The invention relates to a thin-wall braking sleeve of a direct drive rotary table and a manufacturing method. A main body of the thin-wall braking sleeve of the direct drive rotary table is an annular cylinder, and the cross section of the annular cylinder is an oval ring. In the height direction of the oval ring, an external gap d is reserved between the outer edge of the oval ring and the inner wall of a case body, and an internal gap c is reserved between the inner edge of the oval ring and the outer wall of a motor rotor, wherein the external gap d is larger than the internal gap c and is filled with hydraulic oil. When the external gap d is filled with the hydraulic oil and the radial hydraulic pressure is generated, at least one action point on the inner wall surface of the annular cylinder is attached to the outer wall of the motor rotor under the effect of the hydraulic pressure in the circumferential direction of the oval ring, so that friction force is generated. On the premise of guaranteeing the strength and the abrasive resistance of the thin-wall braking sleeve, the thin-wall braking sleeve generates elastic deformation easily, and therefore braking of the direct drive rotary table is easy, safe and reliable, and oil leakage is avoided.

Description

technical field [0001] The invention relates to the technical field of direct drive turntables, in particular to a thin-walled brake sleeve and a braking method for direct drive turntables. Background technique [0002] The direct-drive turntable is mainly used in the rotating coordinates of CNC machine tools, and is also widely used in the automatic control of the rotation angle of radar, turret, gyroscope, etc. The direct drive turntable has been highly valued by relevant industries in recent years due to its remarkable characteristics of zero transmission, no transmission error, no wear of transmission parts, and high precision, and has been continuously listed as a major national project. [0003] Among the technologies related to the direct drive turntable, an important technology is the braking technology of the turntable. At present, the main braking methods include end-face braking using butterfly springs or hydraulic power and encircling braking using hydraulic powe...

AI Technical Summary

Problems solved by technology

The key point is that the existing thin-walled brake sleeves are all circular in cross-section. Under the action of hydraulic pressure, it is very difficult to make a circular cross-section elastically deform in the radial direction.

In engineering practice, the problem of elastic deformation of the thin-walled sleeve is mostly solved by increasing the pressure of the hydraulic system and reducing the thickness of the thin-walled sleeve. The former not only wastes energy, but also brings problems such as oil leakage, and the latter will cause thin-walled sleeves. Wall bushings quickly wear out and wear out the brakes

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