Micro adjustment mechanism for rollers of centre rest

Abstract

An embodiment of the invention provides a micro adjustment mechanism for rollers of a centre rest and belongs to the technical field of construction machinery manufacturing. The micro adjustment mechanism comprises supports 1, rollers 2, eccentric turbine shafts 3 and worms 4; each of the eccentric turbine shafts 3 comprises support portions 31 and roller portions 32; the support portions 31 are arranged at two ends of the body of each of the eccentric turbine shafts 3, and the roller portions 32 are arranged in the middle of the two ends of the body of the eccentric turbine shafts 3; the support portions 31 of the eccentric turbine shafts 3 are arranged on the supports 1 and can rotate around the central shafts of the support portions 31; the rollers are sleeved on the roller portions 32 of the eccentric turbine shafts 3 and can rotate around the central shafts of the eccentric turbine shafts 3; the central shafts of the support portions 31 of the eccentric turbine shafts 3 and central shafts of the rollers are not in the same straight line; and the worms 4 are meshed with worm wheels 33 of the eccentric turbine shafts 3. According to the micro adjustment mechanism, displacement of the rollers can be achieved through rotation angles of the eccentric shafts, and micro displacement of the rollers and the labor-saving effect in adjustment can be achieved through the dual reinforcement principle of worms and eccentric shaft levers.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a structure for adjusting the position of rollers on the center frame of a machine tool, in particular to a fine-tuning mechanism for the rollers on the center frame. Background technique [0002] The steady rest is an auxiliary device used to radially support the rotating workpiece during processing. During processing, there is no relative axial movement between the steady rest and the workpiece. [0003] Before the present invention, the inventor found that the prior art had at least the following problems: in the process of supporting the workpiece in the traditional heavy-duty horizontal lathe steady frame, on the one hand, due to the error of the size of the workpiece itself, and the two rollers of the steady frame relative to the center line of the workpiece The symmetry error often causes one roller to contact and the other roller not to contact. After this situatio...

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Problems solved by technology

[0003]Before the present invention, the inventor found that the prior art had at least the following problems: in the process of supporting the workpiece in the traditional heavy-duty horizontal lathe steady frame, on the one hand due to the workpiece The error of its own size and the symmetrical error of the two rollers of the center frame relative to the center line of the workpiece often cause one roller to contact and the other roller not to contact. After this situation occurs, the rollers of the center frame are often in contact with the workpiece by rotating the screw.

The traditional steady rest is usually driven by a trapezoidal screw, and the lead of the screw is large. A little rotation of the screw will cause a large displacement of the roller, which is not conducive to accurately aligning the center of the workpiece, making it very difficult to align the center of the workpiece.

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