Stuffing screw, protruding shoulder, shaft shoulder, equal height limit bolt, shoulder screw M4 M5

The special T-shaped bolt for channel steel usually includes the head and the rod. The rod is provided with threads. The traditional T-shaped bolt for channel steel is made of steel when it is used. The channel steel and the bolt are both steel, and they are prone to Thermal expansion due to the change of ambient temperature, which is easy to loosen, resulting in unstable connection.

During the production and manufacturing of iron pots, the iron head is connected to the iron pot body through rivets, and then the pot handle is set through the iron head. The iron head connects the pot handle and the iron pot body together. However, there may be inaccuracies in the position of the iron head during installation, and it is necessary to remove the rivets and reinstall the iron head. At present, the removal of rivets relies entirely on manual labor, where workers use screwdrivers to unscrew the rivets. This makes disassembly difficult, wastes a lot of manpower, and has low work efficiency, thereby reducing production efficiency.

The installation joint 31 is connected to the tail end of the screw bracket 33 in a coordinated manner, and the end of the screw 32 is connected to a pin that is connected to the locking part 31 in a coordinated manner; The locking part 31 is connected to the screw 32 through a pin, which facilitates the screw 32 to cooperate when the ball head 3 acts. The fixed buckle cap 38 is connected to the front end of the installation connecting rod 35, and then the tail end is connected to the screw 32 through the nut 36, improving the stress strength of the rivet rod 3; The screw 32 is equipped with four staggered holes that are connected to the ball 34, and at least part of the ball 34 is exposed from the screw 35.

For the shortcomings of existing technology, Guangdong Yueluo Hardware Industry Co., Ltd. provides a relatively simple manual disassembly screw, which can be manually disassembled. To this end, Guangdong Snail Hardware Industry Co., Ltd. provides manually detachable screws (including studs and nuts), with grooves extending from the nut to the stud in the axial direction. The grooves are equipped with control columns that match the sliding of the grooves, and there is a through groove on the circumferential side wall of the control column. A restriction strip parallel to the axis of the control column is set on the circumferential side wall of the control column. The side wall of the channel has a restriction groove that matches the restriction strip, the control column has installation grooves, each installation groove is equipped with a rotating rod that matches the through groove, and has the installation groove and the rotating rod release setting. Further explanation is that the nut has a second installation slot in its groove, and the side wall of the second installation slot has a baffle, which is equipped with a torsion spring on the hinge of the baffle and the second installation slot.

T-bolt, which is called hammer bolt in European standard, is made of carbon steel, and its surface is galvanized or nickel plated. T-bolt can be directly put into the aluminum profile groove. During installation, it can be automatically positioned and locked. It is often used in conjunction with Flange nut. It is a standard supporting connector when installing angle pieces. It can be selected according to the profile groove width and different series of profiles. The T-bolts on the market need to be placed into the channel from the port of the channel when installed in conjunction with the installation channel, and then tightened when moved to the designated position. During installation, the bolts are prone to rotation, loose connection, and easy to slip. Therefore, it is necessary to propose an installation structure that uses T-bolts in conjunction with the channel.