Device for automatically eliminating clearances of screw drive pair
A technology of screw transmission and gap, which is applied in metal processing and other directions, can solve the problems of increasing the workload of machine tool operation and maintenance personnel, the inability to realize automatic elimination of axial gap, and inability to realize automatic compensation of wear amount, etc., and achieve a compact structure space The effect of high utilization rate, good axial rigidity and low cost
Inactive Publication Date: 2010-04-28
李慎旺
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Problems solved by technology
However, the adjustment of the axial clearance of the screw transmission pair for the feed transmission of the existing metal cutting machine tools and CNC machine tools is manual adjustment, and its disadvantage is that it cannot realize the automatic compensation of the amount of wear, cannot realize the automatic elimination of the axial clearance, and the adjustment is troublesome. And it cannot be adjusted arbitrarily during work, which increases the workload of machine tool operators and maintenance personnel, and affects the machining accuracy
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[0010] The following descriptions are only preferred embodiments of the present invention, and therefore do not limit the protection scope of the present invention.
[0011] See figure 1 , including lead screw 1, main nut 2, screw 3, machine slide 4, adjusting bolt 5, spring 6, guide column 7, nut with bevel 8, bolt 9, lock nut 10, wedge 11 and ball 12. The main nut 2 and the beveled nut 8 are respectively connected with the lead screw 1, the main nut 2 is connected with the machine tool slide 4 through the screw 3, and the flange of the beveled nut 8 has a through hole, which can move axially along the guide column 7 (see figure 2 ). The self-locking wedge 11 is placed between the main nut 2 and the beveled nut 8 , one end of the spring 6 presses on the self-locking wedge 11 , and the other end is pressed by the adjusting bolt 5 . Have guide groove on the inclined surface of band nut 8 (see image 3 ).
[0012] When the driving motor is started, the lead screw 1 is drive...
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The invention relates to a device for automatically eliminating clearances of a screw drive pair, which comprises a leading screw, a main nut, a bolt, a machine tool sliding plate, an adjusting bolt, a spring, a guide post, a nut with an inclined plane, a bolt, a locking nut, a wedge block and a ball. The device is characterized in that the main nut and the nut with the inclined plane are connected with the leading screw respectively, the main nut is connected with the machine tool sliding plate through the bolt, and the flange of the nut with the inclined plane is provided with a through hole so that the nut with the inclined plane can move axially along the guide post. The wedge block with a self-locking function is supported between the main nut and the nut with the inclined plane; andone end of the spring is pressed on the wedge block with the self-locking function, while the other end is tightly pressed by the adjusting bolt. The incline plane of the nut with the inclined plane is provided with a guide groove. The device automatically eliminates axial clearances, has no reverse idle stroke, has adjustable pretightening force, good axial rigidity, smooth transmission, low cost, compact structure and high space utilization rate, is applied to feed drive systems of a metal cutting machine tool and a numerical control machine tool, and can greatly improve the processing accuracy.
Description
Technical field: [0001] The invention relates to an automatic elimination device for the gap of a screw transmission pair, which is mainly used for the automatic adjustment of the axial gap of the screw transmission pair used for the feed transmission of metal cutting machine tools and numerical control machine tools. Background technique: [0002] The screw transmission pair, especially the screw transmission pair used for the feed transmission of metal cutting machine tools and CNC machine tools, has strict requirements on the axial clearance in addition to the accuracy of the feed motion in a single direction. In order to ensure the precision and axial rigidity of the reverse transmission, the axial clearance of the screw transmission pair must be eliminated. However, the adjustment of the axial clearance of the screw transmission pair for the feed transmission of the existing metal cutting machine tools and CNC machine tools is manual adjustment, and its disadvantage is ...
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IPC IPC(8): B23Q5/56
Inventor 李慎旺
Owner 李慎旺
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