Novel limiting device

Abstract

The invention discloses a novel limiting device which adopts a non-contact proximity switch as an electrical limit, is higher in precision than a contact type limiting mode and is not affected by thenumber of times of use. Three-level limiting protection, namely electrical limiting, software limiting and mechanical limiting, is adopted, the priorities of the three-level limiting protection are sequentially from high to low, and electrical limiting acts firstly under the normal condition; the limiting position is adjustable, and positive limiting and negative limiting can be adjusted accordingto actual conditions; after the positive limiting position and the negative limiting position are determined, software limiting is set according to the number of pulses needed when the stepping motoroperates in a complete limiting interval, and setting is flexible and convenient; and heat dissipation in the device can be facilitated during operation of the device, meanwhile, vibration can be reduced, and noise generated during work is reduced.

Description

technical field [0001] The invention belongs to the technical field of mechanical parts, in particular to a novel limit device. Background technique [0002] The limit device refers to the part that ensures that the torsion angle of the elastic component does not exceed a certain limit value. The limit switch (hard limit) is the position limit of each axis on the electrical hardware, usually similar to the travel switch, and the mechanical limit is the mechanical limit. The position is limited, and rubber blocks are usually used to prevent hard impacts. [0003] At present, the existing limit devices in China mostly use proximity switches, which generate limit signals by inductive proximity switches, and are mostly used in industrial control occasions. The advantages are simple circuits and low cost. The disadvantage is that the limit method is single. , no other protective measures. [0004] Moreover, when the equipment is in use, it will generate a certain amount of heat...

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Problems solved by technology

[0003] At present, the existing limit devices in China mostly use proximity switches, which generate limit signals by inductive proximity switches, and are mostly used in industrial control occasions. The advantages are simple circuits and low cost. The disadvantage is that the limit method is single. , no other protection

[0004] Moreover, when the equipment is in use, it will generate a certain amount of heat due to the operation of the equipment during the working process. If the heat remains inside the equipment and cannot be dissipated, it will cause heat inside the device and reduce the service life of the device, which may cause some internal parts to be damaged. Damage occurs, causing internal failure of the device, making the device unable to work normally, thus affecting the work progress, and also causing economic losses and increasing the user's economic expenditure

[0005] In the fixing method of this kind of device that is usually seen, it is usually fixed directly with bolts. If the device is used for a long time, the bolts may become loose due to long-term use. If the user does not check the equipment regularly, the bolts When the device is loose, the device cannot be firmly fixed on the base, which may cause the device to shake violently. If it is serious, the device will be separated directly, making the device scrapped and unable to continue to be used. It may also reach the user and cause personal injury.

[0006] During the use of mechanical devices, it is inevitable that some failures will occur and the device cannot stop running. At this time, the device needs to be inspected and repaired, but some devices are sealed and connected by bolts, which makes maintenance and inspection very troublesome. , you need to unscrew the bolts step by step to check the internal conditions of the equipment

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