Adjustable Linear Module: Solving Sliding Block Wear and Precision Positioning Issues

The linear module is an upgraded unit of linear transmission structures such as linear guides and ball screws. It is usually composed of motors, ball screws, linear guide rail, and other components. It can provide smooth and precise linear movement in a fixed direction and is widely used in automation equipment, especially in robotic arms, CNC equipment, automated production lines, and other occasions. Linear modules can also be called Cartesian coordinate robots, linear slides, and Linear Guide Modules.

During the use of traditional linear modules, the slider bearings often wear out, resulting in reduced friction between the slider and the guide rail, and the slider cannot be accurately positioned. The bearings between the slider and the linear guide rail are fixed on the sliding block. Since the friction between the slider and the linear guide rail cannot be adjusted, in order to improve the problem of the slider not being able to accurately position, the bearings can only be replaced. This method will lead to frequent maintenance times and is very inconvenient to use, so DLY designed an adjustable linear module.

This adjustable linear module drives the sliding block bearing to move by rotating the screw. When the sliding block bearing suffers a certain amount of wear, the friction between the sliding block and the linear guide rail can be adjusted by moving the sliding block bearing, avoiding the frequent replacement of the sliding block bearing. This can extend the service life of the sliding block bearing and solve the problems raised in the above technical background.

An adjustable linear module includes: a guide rail outer frame. The inner part of the guide rail outer frame is rotatably installed with a screw and a sliding block, and the sliding block is set as a hollow sliding block.

A cavity is opened on the inner wall of the sliding block, a screw is threadedly installed on one side, and the screws are symmetrically arranged in four groups, and one end of the screw is located inside the cavity, and a U-shaped frame is rotatably installed on the end of the screw located inside the cavity, and a sliding block bearing is rotatably installed inside the U-shaped frame, and a bearing groove is opened on the outer wall of the guide rail outer frame, and the sliding block bearing is aligned with the bearing groove.

A fixed block is fixedly connected to the inner top of the sliding block, and the fixed block is threadedly connected to the screw.

One side of the sliding block is provided with a mounting hole, and there are four groups of mounting holes, and the four groups of mounting holes are respectively located at the four corners of the sliding block.

One side of the sliding block is provided with a threaded hole, and the threaded hole is connected to the cavity, the screw is threadedly connected to the inside of the threaded hole, and one end of the screw is fixedly connected to the rotating block.

The upper and lower sides of the U-shaped frame are fixedly connected with limit rods, and two groups of limit slots are provided on the inner wall of the cavity, and one end of the two groups of limit rods is respectively located inside the two groups of limit slots.

Through the design of the screw, rotating block, U-shaped frame, sliding block bearing and bearing groove, after a period of use, the sliding block bearing will be worn to a certain extent, causing the friction between the sliding block and the outer frame of the guide rail to decrease. When the sliding block cannot be accurately positioned, the rotating block is rotated to move the screw on the sliding block, thereby adjusting the position of the sliding block bearing to a suitable position, realizing the adjustment of the friction between the sliding block and the outer frame of the guide rail, facilitating the accurate positioning of the sliding block, extending the service life of the sliding block bearing, and being very convenient to use.

Schematic diagram of the structure from top view