2results about How to "Avoid secondary clamping" patented technology

The utility model discloses an internal support tool for a motor casing. The internal support tool comprises a tensioning sleeve assembly, the device further comprises a first taper sleeve, a second taper sleeve and a mandrel. Taper holes are formed in the two ends of the tensioning sleeve assembly respectively. The first taper sleeve and the second taper sleeve are both provided with outer conical surfaces corresponding to the taper holes; the center of the first taper sleeve and the center of the second taper sleeve are provided with a stepped hole and a threaded hole respectively, the stepped hole and the threaded hole are used for being arranged on a shaft shoulder section and a threaded section in the middle of the mandrel in a sleeving mode, and the first taper sleeve and the second taper sleeve are driven to be close to each other when the second taper sleeve rotates on the threaded section. A hexagonal head is arranged on the outer end face of the second taper sleeve. The two ends of the core shaft extend out of the two end faces of the motor shell respectively. The two-side tensioning mode is adopted, it is guaranteed that the two ends of the inner hole of the motor shell are located on the same axis, secondary clamping is avoided, and machining precision is improved.

The present application belongs to the technical field of circuit board manufacturing, and particularly relates to a circuit board manufacturing device, comprising a base and a soldering gun, wherein the base is provided with a mounting rack, the mounting rack is fixedly arranged on a support, and the mounting rack is provided with a mounting clamp and a displacement structure. The mounting clamp is used for clamping a circuit board, the middle part of the mounting clamp is penetrated from top to bottom, and the circuit board is arranged at the penetration position. The soldering gun is used for soldering the circuit board clamped on the mounting clamp. The displacement structure is arranged on the mounting clamp and used for moving the mounting clamp so that the soldering position of the circuit board corresponds to the position of the soldering gun. A turnover structure is arranged between the mounting rack and the support, the turnover structure can turn over the mounting rack, and the soldering gun can give way when the mounting rack is turned over. The present application can improve the processing precision and efficiency, liberate labor, and additionally, the turnover structure can turn over the mounting rack, the mounting clamp and the circuit board together, so that the secondary clamping of the circuit board can be avoided.