4results about How to "Stressful" patented technology

The utility model discloses a safety protection device for coal mine construction, which belongs to the field of coal mine safety protection and comprises two bases which are oppositely arranged, hydraulic supports are fixedly mounted at the front ends and the rear ends of the bases, a group of lifting frames which are oppositely arranged are mounted on the hydraulic supports, and supporting mechanisms which are used for adapting to mine tunnels with different widths and heights are arranged on the lifting frames. The supporting mechanism comprises two arc-shaped frames which are symmetrically arranged. The device has the beneficial effects that the supporting mechanism, the pressure bearing mechanism and the pressure measuring mechanism are arranged, the device can adapt to mine tunnels with different heights and widths for supporting through arrangement of a lifting frame and a connecting shaft, meanwhile, the top of the mine tunnel can be evenly supported in cooperation with a top plate and multiple sets of arc-shaped plates, and the situation that local stress of the mine tunnel and the device is too large is prevented; the overall supporting effect is optimized, the supporting force of the device on the top of the mine tunnel can be measured through the pressure gauge on the first water tank, safety is improved, and the safety protection performance of the coal mine construction device is improved.

The utility model provides a kind of plate spring measuring tool, belong to plate spring measurement technical field, the plate spring measuring tool has substrate, two positioning components are equipped on substrate, each set of positioning component includes three locating plates, the outer circumferential surface of three locating plates is in abutment with the inner circumferential surface of plate spring eye, left positioning component is slidably connected on substrate;Positioning component further has bottom plate, fixed mounting is equipped on bottom plate, vertical plate is set to the through hole of longitudinal penetration being opened in vertical plate, three are fixedly installed in the front wall of vertical plate and are circumferentially arrayed distribution's hinged seat, the one end of adjusting plate is hinged in hinged seat, and the other end of adjusting plate is installed with locating plate;The support plate of vertical movement is equipped below locating plate, the top surface of support plate is in abutment with the bottom end of plate spring eye;The utility model solves the technical problem that locating shaft size is not adjustable, if the gap of locating shaft and eye inner diameter is too large, then it is not convenient to position plate spring, and it can affect the precision of plate spring measurement.

The application discloses a kind of on-orbit deployment devices of CubeSat, belong to aerospace technology field.The device includes: main frame assembly, hatch, hatch unlocking mechanism, push plate assembly, lateral compression assembly and hatch compression assembly, the main frame assembly shell is square semi-enclosed body, the hatch is rotatably connected on shell by hatch unfolding locking assembly and can form closed body with shell;The hatch unlocking mechanism is installed in the left frame outside;The push plate assembly is arranged in the shell inside and is connected on the bottom plate, for pushing out CubeSat;The lateral compression assembly is arranged in the shell inside right upper corner guide rail support frame, for lateral compression CubeSat;The hatch compression assembly is fixedly installed in the inside of hatch, for CubeSat in the direction perpendicular to bottom plate is compressed.The device has high reliability, low separation angular velocity, ultra-high vacuum environment unlocking and has satellite lateral compression and the like characteristics.

The utility model provides a thread cutting structure of sewing machine belongs to sewing machine technical field. It solved how to avoid the problem of bird nest -like thread ball phenomenon on the sewing material. The thread cutting structure of this sewing machine, sewing machine includes the needle plate with the needle drop hole of lower shaft, the thread cutting structure includes the dynamic cutter and the thread pressing piece of the sleeve setting in the lower shaft outside and can rotate relative to the lower shaft circumference, the needle plate is located the upper of dynamic cutter and thread pressing piece, the outer wall of dynamic cutter is equipped with the thread hooking hole, the thread hooking hole one side hole wall is the inclined wall that sets up relative to the axial inclination of lower shaft, the needle drop hole is close to the edge of one side of inclined wall setting, the thread pressing piece is close to the edge of other side of inclined wall setting, the needle plate bottom is fixed with the thread cutting knife, the needle drop hole is the strip hole, one end of needle drop hole is used for the needle to wear and set, the other end of needle drop hole is towards the inclined setting of thread cutting knife head, and the head of thread cutting knife projects on the end hole wall of needle drop hole inclined setting and sets up. The thread cutting structure of this sewing machine can avoid the bird nest -like thread ball phenomenon on the sewing material.