Linear Actuator

Abstract

The invention provides a linear transmission device, which is mainly composed of a long shaft, a moving module, a rolling unit, a return assembly, a sensing element and a data intercepting unit. The structure of the invention is simple, and the sensing element is arranged on the The connection between the first return pipe and the second return pipe of the return assembly can diagnose the difference in distance between the rolling parts in real time before the abnormal condition of the spacer of the rolling unit occurs. Through the sensing element Outputting the sensing signal allows the terminal to stop in real time to confirm the status of the workpiece and the machine, avoiding structural damage to the machine and workpiece caused by continuous operation, and the sensing element can also be used as a data transmission medium to further facilitate maintenance.

Description

technical field [0001] The invention relates to a linear transmission device, in particular to a linear transmission device capable of diagnosing the difference in distance between rolling elements in real time. Background technique [0002] Such as Figure 1A As shown, it shows one of the diagrams of the linear roller bearing in the US patent (US7178981B2), which has a guide carriage 1, and the guide carriage 1 can be installed on the guide rail 2 in a rolling manner through balls (not shown in the figure) , the guide carriage 1 is provided with at least one rolling channel (not shown) for the balls, and the rolling channel includes a supporting channel (not shown) for supporting the balls, and a deflection channel (not shown) connecting the supporting channels not shown), the deflection channel is set in the end assembly 3 of the guide carriage 1, and the balls in the rolling channel are subjected to displacement resistance in the direction of rotation, and the end assembl...

AI Technical Summary

Problems solved by technology

[0002] like Figure 1A As shown, it shows one of the diagrams of the linear roller bearing in the US patent (US7178981B2), which has a guide carriage 1, and the guide carriage 1 can be installed on the guide rail 2 in a rolling manner through balls (not shown in the figure) , the guide carriage 1 is provided with at least one rolling channel (not shown) for the balls, and the rolling channel includes a supporting channel (not shown) for supporting the balls, and a deflection channel (not shown) connecting the supporting channels not shown), the deflection channel is set in the end assembly 3 of the guide carriage 1, and the balls in the rolling channel are subjected to displacement resistance in the direction of rotation, and the end assemblies 3 are respectively provided with sensors 4, the sensors 4 are used for Detect the sliding resistance generated by the deformation of the cover plate when the ball is running to determine whether it is abnormal. However, the installation of the above-mentioned sensor 4 will generally increase the length of the guide carriage 1, which will increase the cost and complicate the structure. Problems that affect the operating schedule

[0003] like Figure 1B As shown, it shows one of the diagrams of the Japanese patent (JP2007225024) related to the ball screw with sensing device, which is provided with a sensing device 6 (capacitive type, optical type) in the concave hole on the nut 5 to measure the ball 7, and then determine the stress on the nut 5, however, the structure of the sensing device 6 will change the size of the nut 5, increase the outer diameter of the nut 5, and then affect the operating stroke of the nut 5

[0004] Japanese Patent No. JP3936519 discloses the technical content of installing a vibration sensor at the bending point of the outer circulation part of the ball screw to sense the running condition of the ball. Among them, the vibration sensor needs to be specially dug on the nut to install the vibration sensor. The processing method It is more complicated and costly. Moreover, the way of setting the vibration sensor at the bending part of the outer circulation part can only sense the stress change produced by the ball hitting the wall of the bending part of the outer circulation part, so as to know the smoothness of the running of the ball (such as Insufficient lubrication may cause the balls to run poorly), the distance between the balls cannot be measured, and it is impossible to know whether the balls are blocked or stuck

[0005] Others such as Japanese Patent No. JPA2014159847 and Japanese Patent No. JPA2013200032 all have the above-mentioned shortcomings. Therefore, the existing linear transmission device still needs to be improved, and it needs to be improved.

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