What is the tolerance range of precision screws?
What is the tolerance range of precision screws?
In the field of mechanical design, there are a large number of connector connection structures that need to be fastened and positioned. As shown in Figure 1, the more common positioning and fastening connection methods at present are that pins 5 and fasteners are used for positioning and fastening, respectively. That is, cylindrical pins or taper pins are used for positioning, and fasteners such as screws or double-ended studs are used for fastening.
double-headed pin puller includes a slider hammer and a sliding rod, two ends of the sliding rod are respectively provided with different types of pin-pulling parts, the pin-pulling parts are threadedly connected with the sliding rod, and the sliding rod is also provided with There is a sliding rod limit block, and the sliding rod is slidably connected with the slider hammer. The double-headed pin puller can install two types of pin-pulling heads at the same time, and can pull out two different types of pins. It is easy to use and has high work efficiency. Disadvantage: Single function, cannot be used to install pins.
However, although the above-mentioned screw belt (2) can achieve the expected effect, it is also found in its actual implementation. Although this structure has multiple grooves on both sides of the main body for the driving and turning of the locking screw tool, However, the groove is only used for driving the screw belt drive, and since the screw will swing on the screw belt, it is impossible to stably align the screw on the screw belt with the point where the screw is to be set. , which leads to great inconvenience in operation and use, and also affects the efficiency of screw and screw installation, so that there is still room for improvement in the overall structural composition.
In order to achieve this technical purpose, the plan of Guangdong Yueluo Hardware Industry Co., Ltd. is: a new type of open rivet, including a rivet body and a mandrel, the rivet body and one end of the mandrel are fixedly connected, and the lower end of the rivet body is provided with There is a round table, the top of the mandrel is provided with a nail head pit, the mandrel is provided with a stop groove, the lower side of the stop groove is provided with a mandrel breakpoint, and the mandrel is set on the mandrel. There is a stop ring, the stop ring is located on the lower side of the round table, and the lower side of the stop ring is provided with an assembly warp.
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