4results about How to "Reasonable and practical structure" patented technology

The utility model relates to a bicycle chain cover technical field, concretely is a child protection chain cover structure, including inner cover and outer cover, and the inner cover and outer cover are respectively the oval shell of front end opening and, the side of inner cover is sequentially set up rear axle through -hole no.

The utility model relates to the technical field of machining, and particularly discloses a half axle gear spline-based measuring device which comprises a base, the center of the upper surface of the base is rotatably connected with a first rotating shaft through a bearing, and the top end of the first rotating shaft is fixedly provided with a rotating table. The upper surface of the rotating table is provided with a containing groove which is correspondingly connected with the gear face of the tooth portion of the half axle gear in a clamped mode, and the center of the bottom of the inner wall of the containing groove is provided with a limiting gear column which is correspondingly connected with the lower end, close to the gear face, of a spline in the neck of the half axle gear in a clamped mode. The beneficial effects of the device are that the device facilitates the rapid and automatic clamping of a half axle gear, facilitates the rapid adjustment and movement of an installation plane run-out measuring head and a shaft diameter run-out measuring head, enables the measuring heads to abut against a proper measurement position on the half axle gear, facilitates the automatic control and rotation of the half axle gear, and facilitates the testing. Convenience is brought to measurement and detection work, and use requirements can be well met.

This utility model relates to the field of circuit board module welding technology, specifically a circuit board module welding device, including: a base plate and a tool placement groove. The tool placement groove is provided on the upper surface of the base plate, and an L-shaped support rod is installed on the upper surface of the base plate. A supplementary lighting device is installed on the vertical surface of the upper end of the L-shaped support rod. A sliding groove is provided on the upper surface of the base plate. Compared with the prior art, the beneficial effects of this utility model are: the utility model has a reasonable and practical structure, which strengthens the fixation of the circuit board, resulting in a higher welding qualification rate, and also gives the fixing device the function of flipping.

The utility model relates to the technical field of automobile fault diagnosis, in particular to automobile fault detection equipment which comprises a detection host and a Bluetooth connector, a placement groove is formed in the center of the bottom of a groove in the back face of the detection host, the Bluetooth connector is contained and placed in the placement groove, a first magnet piece is fixedly installed in the bottom of the placement groove in an embedded mode, and a second magnet piece is fixedly installed in the placement groove. And a second magnet sheet which is magnetically attracted to the first magnet sheet is fixedly installed on the side, close to the bottom of the containing groove, of the Bluetooth connector in an embedded mode, and auxiliary fixing assemblies corresponding to the Bluetooth connector are symmetrically and fixedly installed at the positions, located on the upper side and the lower side of the containing groove, of the bottom of the groove. The detection device is simple in structure and convenient to operate, the Bluetooth connector can be quickly, conveniently and detachably adsorbed and fixed to the back face of the detection host, the situation that the Bluetooth connector is lost and cannot be found is avoided, convenience is brought to detection, processing and use of an automobile, and use requirements can be well met.