2results about How to "Detachable connection" patented technology

This invention relates to a crane boom head and a crane, wherein the crane boom head includes a boom head body (10) and a first pulley assembly (20). The boom head body (10) includes a connecting part (11) for connecting to an extension arm. The first pulley assembly (20) is mounted on the boom head body (10), and a preset distance is maintained between the first pulley assembly (20) and the connecting part (11) to avoid interference between the first pulley assembly (20) and the extension arm. The crane includes the aforementioned crane boom head. This invention enables integrated transportation of the pulley structure and the crane boom head, reducing transportation costs. By maintaining a preset distance between the first pulley assembly and the connecting part, interference between the first pulley assembly and the extension arm can be avoided. When the crane needs to install an extension arm, there is no need to disassemble and assemble the pulley structure, saving the crane's disassembly and assembly time. Furthermore, the function of the pulley structure is retained for future use, thereby improving the crane's operating efficiency.

The utility model discloses a kind of power supply devices, including shell, photosensitive sensing part, display module, power modulation module, control module and timing module, shell is at least partially provided with perspective part, perspective part is made of transparent or translucent material, photosensitive sensing part is set in shell and photosensitive sensing part corresponds with perspective part, photosensitive sensing part is used to detect the light intensity outside shell by perspective part, display module is set in shell and display module corresponds with perspective part, power modulation module is set to shell, the output end of power modulation module is used to be connected with load, control module and timing module are set in shell, control module is connected with photosensitive sensing part, display module, timing module and power modulation module respectively, the design structure is compact, clearly present control condition for user, convenient and reliable.