3results about How to "Tight protection" patented technology

The invention relates to the technical field of circuit breakers, and discloses a frame circuit breaker convenient to maintain, which comprises a frame and a circuit breaker body arranged in the frame, rollers are arranged on the frame, the circuit breaker body comprises two rows of contacts used for being connected with contact seats in a cabinet body, and the frame comprises a bottom plate, a top plate, a left side plate, a right side plate and a rear plate. The rear plate is provided with a receding hole for the contact to extend out, a protective cover is arranged on the rear plate in a sliding mode, the protective cover can slide in the direction close to or away from the contact, the protective cover is used for covering the contact, a transmission assembly is arranged between the protective cover and the rolling wheel, and the rolling wheel drives the protective cover to slide through the transmission assembly when rotating. When the roller rotates, the transmission assembly drives the protective cover to slide in the direction close to the contact, so that the protective cover covers the contact, the contact is prevented from being collided and contaminated by dust or foreign matters in the carrying, storage or maintenance process, and the fault rate of the circuit breaker is reduced.

The utility model relates to the related technical field of plate welding, in particular to a protective PCB welding device which comprises a machining base, an adjusting mechanism is arranged at the top of the machining base, and a protective mechanism is arranged at the top of the adjusting mechanism. Through the arrangement of the adjusting mechanism, the temperature sensor accurately monitors the temperature of the welding gun in real time, once the temperature exceeds a preset safety value, the controller responds rapidly, the driving air cylinder is started immediately, the machining table is driven to descend rapidly, and the temperature sensing adjusting mechanism ensures that a PCB can be away from a heat source in time when the high temperature of the welding gun is abnormal; the problems that electronic components on the PCB are damaged, circuits deform or the performance of the PCB is degraded due to overheating are effectively solved, the safety in the PCB welding process is greatly improved, when the machining table descends, the driving motor synchronously operates, the protection plate is driven to be rapidly unfolded and folded, the PCB is tightly protected, and double reliable protection barriers are provided for the PCB.

The utility model relates to mechanical engineering technical field discloses bunched steel pipe conveying belt, including support board, the inside rotation of support board is connected with conveying belt, the bottom front and back end fixedly connected with support frame of support board, the inside of support frame is provided with protection institution, the top of support board is provided with buffer mechanism, the protection institution includes drive motor, the output fixedly connected with the runner of drive motor, the rear end fixedly connected with bidirectional screw rod of runner, the surface front and back end screw thread connection has the sliding block of bidirectional screw rod, one end of sliding block is fixedly connected with connecting rod, one end fixedly connected with the guard board of connecting rod. The utility model drives the runner to rotate through drive motor starting, and the runner makes bidirectional screw rod rotate through belt transmission, and the sliding block of bidirectional screw rod surface front and back end moves reversely because of screw thread connection, and the sliding block moves the guard board through connecting rod and drives, can adapt to different specifications bunched steel pipe.