High-stability lifting mechanism

Abstract

The invention discloses a high-stability lifting mechanism which comprises a motor, a screw rod, a frame and a nut movable block. The screw rod is longitudinally arranged, and the motor is fixed to the frame and is connected with and drives the screw rod to rotate. The nut movable block is in threaded fit with the screw rod. The high-stability lifting mechanism is characterized by further comprising a supporting guiding mechanism, the supporting guiding mechanism comprises a guiding trolley fixed to the nut movable block, and a guide plate fixed in the frame and arranged parallel to the screw rod, and two rows of wheels used for clamping the guide plate are arranged on the guide trolley. According to the high-stability lifting mechanism, due to the fact that the supporting guiding mechanism is additionally arranged, the shearing force exerted on the screw rod originally is shared by the nut movable block through the guide plate and the frame, the meshing force between the nut movable block and the screw rod is reduced, the friction resistance between the nut movable block and the screw rod is greatly reduced, and therefore the screw rod can operate more smoothly relative to the nut movable block. Meanwhile, part abrasion is also reduced in long-term use, and the matching precision of the nut movable block and the screw rod and the working stability of the whole mechanism are easily improved.

Description

technical field [0001] The invention relates to a high-stability lifting mechanism. Background technique [0002] At present, machine processing equipment in the field of machining (such as cutting, welding, etc.) are all high-precision electronically controlled equipment, and the lifting mechanism used to lift heavy objects or other functional supports usually adopts an electric screw mechanism. The composition of the electric screw mechanism usually includes a motor, a screw, a frame, and a nut movable block. The motor is fixed on the frame and connected to drive the screw to rotate. The nut movable block is slid on the frame and is threaded with the screw for lifting. The load-bearing plate or other functional supports of heavy objects are usually fixed on the nut movable block. As we all know, the electric lead screw has high control and running precision. [0003] However, the existing above-mentioned electric screw mechanism applied to machine tool processing equipme...

AI Technical Summary

Problems solved by technology

[0004] The nut movable block is mainly supported by the screw rod. When the nut movable block is stressed, the shear force applied to the screw rod is relatively large, resulting in a The increase of the bite force between the screw rods increases the frictional resistance between the two, which affects the smoothness of the screw rod driving the nut movable block

And after a long period of use, the loss of the nut movable block and the screw rod is large, which not only affects the matching accuracy and working stability, but also easily generates noise, which greatly reduces the service life of the mechanism and increases the repair and maintenance costs of the mechanism

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