High precision shoulder screw flat head stainless steel hexagonal shoulder bolt M5 M6 M8

In order to solve the problems existing in the existing technology, Yueluo Company provides a fastener that prevents the nut from falling off. After the nut is installed in place, a locking strip is inserted into the bolt groove to lock the nut, preventing it from loosening and preventing it from falling off. If the nut needs to be removed, the locking strip can be removed and the nut can be removed normally.

The main purpose of screws is to make industrial products fixed as a whole. During use, it is common to encounter problems such as the inability to close between teeth, excessive force locking resulting in the screw head being disconnected, or poor tooth pattern locking not being able to meet the usage conditions, all of which are quality and accuracy issues. Screws are "quantity products", not handmade artworks. In mass production, they aim to achieve high-precision and stable quality and provide consumers with affordable prices. The accuracy of screws is usually 6g level, while the rough screws used in construction projects are 15g level. The value of screws is very important, and there are examples in the world where car factories go bankrupt due to poor screw quality; There are also examples of aircraft falling and vehicles overturning due to poor screw quality.

The technical problem that Yueluo aims to solve is to provide a medical self-locking screw that can fix the inner screw inside the outer screw. The outer screw head is expanded by a thimble on the inner screw, and the mating body is expanded by an outer cone on the inner screw, compressing the surrounding bone and achieving a double locking effect through self-locking between the inner and outer screws; Be able to hook the surrounding fixed parts when the stop ring retracts, achieving a stop effect; Effectively preventing adverse reactions such as loosening and micro movement after long-term service of implanted prostheses, in order to solve defects caused by existing technology.

The purpose of Guangdong Yueluo Hardware Industry Co., Ltd. is to provide a flat gasket that improves the lubrication performance of the contact surface and reduces the friction of the contact surface. Yueluo is implemented through the following technical solution: a flat gasket with flat upper and lower end faces, characterized in that the upper and lower end faces are arranged with pits in a point shape, which are spherical pits with a diameter between 2-3mm and a depth of 0.5_ Between 1mm. The bottom of some pits is equipped with through-holes that run through the upper and lower end faces, with a diameter of no more than 0.6mm. The flat gasket provided by Yueluo can effectively improve the lubrication performance of the gasket contact surface, reduce friction on the gasket contact surface, and reduce failure rate due to the placement of pits with reasonable design parameters on the upper and lower end faces of the flat gasket, which can serve as oil storage; Furthermore, the design of the through-hole allows for a smooth oil passage between the upper and lower end faces of the gasket, ensuring good lubrication for both ends.

In recent years, a spring pin connection structure has emerged in the connection between the crossbeam and the column: a pin hole is set on the column, and a spring pin is set at the end of the crossbeam. During installation, the spring pin can be aligned with the pin hole and popped in. However, when using two or more spring pins, if there is a slight deviation between the spring pin and the pin hole, it will be difficult to spring into the pin hole; If the pin hole is drilled larger, although it is easier to spring in, it will cause looseness between the spring pin and the pin hole. In addition, after using the spring pin for a long time, the spring is prone to corrosion and fracture, which also leads to structural instability and difficulty in dismantling the crossbeam.