High-precision linear displacement transmission mechanism capable of being lengthened infinitely

Abstract

The invention discloses a high-precision linear displacement transmission mechanism capable of being lengthened infinitely. The high-precision linear displacement transmission mechanism capable of being lengthened infinitely comprises a base, a roller strip assembly group, linear guide rail pairs, a slide table, a cam assembly group and a servo motor, wherein the roller strip assembly group is mounted on a roller strip mounting base surface of the middle part of the base; the linear guide rail pairs are mounted at the two sides of the top surface of the base; the slide table is mounted on thelinear guide rail pairs; the cam assembly group is mounted on the bottom surface of the slide table through a bearing base; the servo motor is arranged on the slide table; a small belt wheel is mounted on the output shaft of the servo motor; the small belt wheel is connected with an input belt wheel of the cam assembly group through a synchronous belt; and the cam assembly group is in matched transmission with the roller strip assembly group. The high-precision linear displacement transmission mechanism capable of being lengthened infinitely provided by the invention is suitable for long-stroke linear displacement, can be lengthened infinitely, and has the advantages of being high in precision, long in distance, high in displacement seed and low in maintenance cost.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment transmission mechanisms, and more specifically relates to an infinitely extendable high-precision linear displacement transmission mechanism. Background technique [0002] The linear displacement transmission mechanism is a mechanism that must be used in the linear movement of various mechanical equipment, and it is a linear displacement mechanism that requires high positioning accuracy such as machine tools, automated production lines, and robot moving and handling. [0003] At present, the widely used high-precision linear displacement transmission mechanisms include ball screw pairs and rack and pinion pairs. [0004] The ball screw pair is widely used in various precision equipment, such as machine tools, and has many advantages such as high speed, high precision and high stability in a short distance. However, with the extension of the displacement distance, the displacement spee...

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Problems solved by technology

[0004] The ball screw pair is widely used in various precision equipment, such as machine tools, and has many advantages such as high speed, high precision and high stability in a short distance. However, with the extension of the displacement distance, the displacement speed, guide The accuracy of the process will be reduced, but the manufacturing difficulty and procurement cost will continue to increase, and the manufacturing length is also limited. The longer the screw, the greater the thermal deformation affected by the temperature. At the same time, the length of the screw is also limited to a certain extent. Therefore, ball wire The rod pair is not suitable for linear motion with super long strokes

[0005] Later, in the long-stroke linear movement, people often use rack and pinion pairs instead of ball screw pairs, but rack and pinion pairs generally need to drive the transmission motor through the reducer to drive the pinion to rotate to achieve linear displacement. Currently, it is widely used The high-speed precision planetary reducer cannot achieve zero backlash, and the larger the diameter of the pinion, the greater the backlash reflected on the linear axis, which will directly reduce the performance and machining accuracy of the machine tool; and if double gears are used to eliminate the backlash If there is no clearance, then an additional set of motor and deceleration mechanism is needed, and the cost will double; in addition, the rack and pinion pair and the gears inside the planetary reducer are sliding friction pairs. For lubrication, material selection and machining accuracy of each part are all important. There are high requirements, and, in use, it will soon wear out and need to be readjusted or replaced, which increases the cost of use

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