Customized furniture, furniture, screws, chamfered hexagonal socket bolts, baby bed, upper and lower bed, iron frame, Bunk bed accessories

The defect of the existing pressing scheme is that when the retaining ring sleeve is placed in the chamfered or guide section of the shaft head, the retaining ring cannot be accurately fixed, and the retaining ring is prone to tilting or falling off. Especially when the shaft head is located inside the bearing chamber depression, the tilting of the retaining ring will bring difficulty to pressing the retaining ring, affect production efficiency, and even cause product scrapping.

The previous anti-theft screws, no matter what dismantling tool is used, can prevent disassembly and effectively play a anti-theft role. The anti-theft screw consists of two parts. The upper part is a hexagonal component, and the lower part is a threaded component; Rotating connection between hexagonal components and threaded components; The upper part of the screw is an inner polygonal hole. A lock is arranged inside the hexagonal component, which is composed of a shell of the lock cylinder and a lock cylinder. The lock cylinder is rotationally connected to the lock cylinder housing. The lock cylinder housing is fixedly connected to the hexagonal component, forming a structure with a pin hole on the hexagonal component. The lock cylinder housing is also equipped with a pin hole, and the fixed pin is fixedly connected to the lock cylinder housing and the hexagonal components through the pin hole. The multilateral hole set at the bottom of the hexagonal component and the multilateral hole set on the screw are connected. The lower part of the lock cylinder is a screw. The screw is located inside a multilateral hole. A threaded polygonal block connected to a screw with threads. The polygonal block moves up and down within the polygonal hole. During homework, slowly rotate the hexagonal components left and right while rotating the key to achieve alignment of the upper and lower multilateral holes. The multilateral block moves the hexagonal components and threaded components up and down within the multilateral holes to connect and prevent theft. The anti-theft screw of this structure has two drawbacks. One is that the polygonal block moves up and down within the polygonal hole, and the polygonal hole in the connecting piece and the polygonal hole on the screw have no position limiting structure. Due to the polygonal structure, the polygonal holes of the two components cannot be aligned, resulting in positional deviation. Both edges hinder the upward and downward movement of the polygonal block, which is not smooth during use. The second is that the shell of the lock cylinder is connected to the hexagonal components through a pin, which exposes the hexagonal components and is easily damaged, leaving an opportunity for theft. Pinyin

The flat gasket is an accessory on the high-speed rail base plate. The two planes of the product are required to be flat, the shape and size of the internal hole are accurate, and there are no Casting defect (such as air holes, shrinkage holes, sand holes, etc.). The casting material requirements are GB/T450-12. Due to the light weight and large demand of flat gasket, if it is produced by ordinary sand casting process, the casting is easy to produce Casting defect such as deformation, sand hole, air hole, etc., and the molding area is large, the production efficiency is low, and it is difficult to complete the production task.

In the past, there were two implementation methods for thread attraction devices, which used magnets to magnetize the electric screwdriver head and use the screwdriver head to approach the thread, thereby achieving the function of bonding and picking up threads between the thread and the electric screwdriver head. The second method is to use a vacuum generator to create negative pressure in the thread guide groove, attracting the thread into the pipe and achieving thread pickup. The disadvantage of each solution is that during the process of selecting screws, they cannot be aligned with the threaded groove, and the bonding of the screws may be misaligned or leaked. The disadvantage of the second solution is that screws with a aspect ratio less than 1.7 are prone to deformation and have low stability. In this way, the existing technology still needs improvement and development.

At present, there are various types of intelligent terminals on the market. Due to the overall size reduction of intelligent terminals and the more compact internal components, nuts are generally made of injection molded nuts. Traditional injection molded nuts are directly fixed to the equipment, which are prone to loosening and falling off during use, greatly reducing the service life of injection molded nuts and bringing inconvenience to the use of mobile terminals.