13results about How to "Prevent backward movement" patented technology

The invention discloses a turbine rotor structure capable of preventing blades from moving backwards and an aero-engine, the turbine rotor structure comprises turbine blades, a turbine disc, a labyrinth sealing ring, a clamping ring and a vibration reduction piece, the turbine blades and the turbine disc are connected through tenon teeth and mortises, and the tenon teeth and the mortises are each of a two-tooth structure; the vibration reduction pieces are installed between the turbine blades and the turbine disc. The labyrinth sealing ring is assembled on the turbine disc and axially limited through the clamping ring. The turbine blade is in a bent and twisted shape; the problem that the blade moves backwards can be solved, and therefore the safety and reliability of the aero-engine are guaranteed.

The utility model provides a structure which can properly protect the auxiliary battery in the case that the metal part installed in the lower back plate is opposite to the auxiliary battery. The protection structure of the battery has: an auxiliary battery which is arranged at the tail of a vehicle and has a terminal; a lower back plate which defines the lower edge of a tail gate opening and has a lower back plate hook with a metal part installed at the part which is behind the auxiliary battery; and a gap filling part which is arranged between the lower back plate and the auxiliary battery, the gap filling part has: a first protruding part which protrudes towards the rear of the vehicle and is opposite to the metal part; and a second protruding part which protrudes towards the front of the vehicle and is opposite to the part of the auxiliary battery which is away from the terminal in the vehicle width direction.

The utility model relates to the field of flood prevention structures, in particular to a water conservancy project flood prevention structure which comprises a fixing block arranged at the other end of a main body, a rotating hole formed in the inner side of the fixing block, a rotating shaft arranged on the inner side of the rotating hole, a supporting rod arranged at the other end of the rotating shaft and a first screw hole formed in the inner side of the supporting rod. A first bolt is arranged on the inner side of the first screw hole, a telescopic rod is arranged on the bottom side of the first bolt, a second screw hole is formed in the inner side of the telescopic rod, and a fixing base is arranged at the other end of the telescopic rod. The situation that water pressure is too large to move backwards and push over is avoided, and the flood prevention effect and safety of the flood prevention structure of the water conservancy project are greatly improved; the water conservancy project flood prevention structure is provided with the height adjusting device, the height can be adjusted according to the field water regimen, and therefore the practicability and the flood prevention effect of the water conservancy project flood prevention structure are improved.

This utility model relates to a bending and flattening mold, including an upper mold module and a lower mold module. The lower surface of the upper mold module is provided with a flattening surface for flattening the workpiece. The lower mold module is provided with a mounting groove, in which a fixing block and a longitudinally sliding tube position float are provided, and a stripping ejector pin assembly is provided to provide elastic force to the tube position float. The fixing block is provided with a first positioning groove for positioning the front end of the bent part of the workpiece, and the tube position float is provided with a second positioning groove connected to the first positioning groove and a positioning protrusion for positioning the rear end of the bent part of the workpiece. The mold has a simple structure. When the mold is opened, the bottom surface of the second positioning groove is higher than the bottom surface of the first positioning groove; when the mold is closed, the bottom surfaces of the first positioning groove and the second positioning groove are on the same plane, which facilitates the subsequent flattening of the bent part. The inner surface of the first positioning groove and the positioning protrusion work together to achieve precise positioning of the front and rear ends of the bent part of the workpiece, and the flattening operation is completed by the flattening surface, effectively preventing stripping and improving processing accuracy and efficiency.

The invention relates to an electric connection device which comprises a bridge-type contact, and a busbar socket and a cutter body socket which can be elastically clamped are formed on the two sides of the bridge-type contact respectively. An upper support and a lower support, the upper support is installed on the contact above the knife body socket, the lower support is installed on the contact below the knife body socket, a guide socket is formed between the upper support and the lower support, and the guide socket is located on the front side of the knife body socket; the two sides of the upper support are respectively provided with an upper abutting portion, the two sides of the lower support are respectively provided with a lower abutting portion, and the upper abutting portion and the lower abutting portion on the same side correspond to each other up and down. The two guide top plates are fixed to the two sides of the body slotting tool respectively, the upper side and the lower side of the front end of each guide top plate are each provided with a guide protruding block, and each guide protruding block is provided with a front inclined guide face and a rear inclined guide face. Friction loss between the body slotting tool and the bridge type contact is reduced, and the service life of the electric connection device is prolonged.

The application discloses a flying probe machine with accurate positioning function and dust-free type for PCB, relates to the technical field of PCB detection, and comprises a machine body, a fixing mechanism, a top seat, a workbench and a detection mechanism. The top seat and the workbench are arranged at the upper and lower ends of the machine body respectively. Compared with the flying probe machine for the current PCB detection, the flying probe machine is provided with a feeding assembly and a guide assembly. Different sizes of PCBs are transported into the fixing mechanism through the cooperation of the feeding assembly and the guide assembly, so that the PCBs integrated with high-end chips can be accurately moved to the middle position of the fixing mechanism, and a solid foundation is provided for the accuracy of subsequent probe testing. In addition, the feeding assembly and the guide assembly in the application can directly transport new PCBs into the fixing mechanism after the detection of the PCBs is completed, thereby avoiding the trouble that the traditional flying probe machine for PCB detection needs to take out the previously detected PCB and then place the new PCB to be detected into the fixing mechanism.

The invention discloses a base of an integrated house, which comprises a fixed bottom plate, the bottom of the fixed bottom plate is provided with a counterweight box, the peripheral surface of the counterweight box is fixedly provided with an abutting plate, the middle part of the abutting plate is rotatably connected with a supporting rod, and the other end of the supporting rod is slidably connected with a fixed plate located below the abutting plate. A supporting frame is fixedly installed in the middle of the top of the fixing plate, a rotating shaft is rotationally connected to the middle of the supporting frame in a penetrating mode, a rotating knob is fixedly installed on the top of the rotating shaft, and a spiral drill bit penetrating through the middle of the fixing plate is slidably connected to the rotating shaft. The bottom of the spiral drill bit is tightly attached to the bottom face and ascends along a limiting sliding groove, then a rotating knob is rotated, and the spiral drill bit drills into the ground under the action of external spiral blades and gravity, so that the fixing plate and the ground are fixed more firmly, the balance weight box is prevented from displacing, and the stability of the integrated house base is improved advantageously.

This invention provides a method and system for automatically picking up the first arrival time of ultrasonic waves, relating to the field of ultrasonic signal processing. The method involves: acquiring ultrasonic signals and constructing a three-channel input tensor; constructing a mask target sequence and a heatmap target sequence based on the actual first arrival time; constructing and training an encoder-decoder network, employing a residual attention mechanism at skip connections to output modulated features in residual form; inputting the decoder output into the mask branch and the heatmap branch respectively for collaborative learning; fusing the dual-branch outputs during the inference stage, and determining the first arrival time position based on a joint scoring function. The system includes an ultrasonic signal acquisition and preprocessing module, a target label construction module, a picking network construction and training module, and a first arrival time position determination module, used to execute the above method. This invention achieves automatic, high-precision picking of the first arrival time of ultrasonic waves in complex noise environments.

The utility model relates to the technical field of communication optical fibers, in particular to a communication optical fiber coiling device which comprises a supporting base, vertical plates are fixedly connected to the front portion and the rear portion of the upper end of the supporting base respectively, a through hole is formed in the upper portion of the vertical plate at the rear end, and an operation board is fixedly connected to the left side of the upper portion of the front end of the vertical plate at the front portion. A first motor is fixedly connected to the upper portion of the front end of the front vertical plate, a clamping disc is fixedly connected to the output end of the first motor, a limiting sliding groove is formed in the left side of the upper portion of the supporting base, a balancing structure is jointly and fixedly connected between the two vertical plates, and the balancing structure is movably connected with the limiting sliding groove in a clamped mode. According to the communication optical fiber coiling device, the stand column can be conveniently mounted and dismounted, the use difficulty is reduced, the position of an optical fiber can be timely adjusted, the optical fiber can be uniformly wound on the stand column, and the situation that the position is fixed is prevented.

The present invention relates to the technical field of robots that assist the elderly, and discloses a companion robot for assisting toileting, comprising a U-shaped base, an outer wall of the U-shaped base being rotatably connected to a tire via a bearing, a top of the U-shaped base being fixedly connected to a moving device one, a top of the U-shaped base being fixedly connected to an adjusting mechanism, and further comprising: a movable mechanism, the movable mechanism comprising a sliding seat movably connected to the top of the moving device one, a top of the sliding seat being fixedly connected to a connecting column, by arranging a rotating mechanism, the armpits of a user can be lifted up to lift up the user, such operation is simple, the movement range of the human body is small, and the operation of the user is convenient, and two raised parts are arranged at both ends of the U-shaped plate, so that when the U-shaped plate is located under the armpits of the user, the back side of the armpits can be supported to prevent the human body from moving backwards, thereby ensuring the normal operation of the device lifting up the user.

The application relates to the technical field of seats, and discloses a chassis assembly and a seat. The chassis assembly comprises a cushion, a tail plate, a first transmission mechanism and a second transmission mechanism. The first transmission mechanism comprises a first component, a second component and a third component which are rotationally connected in sequence. The second transmission mechanism can push a driven part forward to slide through the tail plate, so that the cushion slides forward. The first transmission mechanism and the tail plate constitute a planar four-bar linkage structure, so that when the tail plate rotates backward, the front end of the cushion is tilted upward. When the tail plate rotates backward, the driven part in the second transmission mechanism drives the cushion to move forward. When a user leans backward, the tail plate can be driven, linkage between the cushion and the backrest is realized, the tail plate rotates to make the cushion move forward and the front end of the cushion tilt upward, so that the safety and stability are improved, the front end of the tilted cushion can support the legs of the user, and the use experience is improved.

The utility model discloses a box turnover machine with buffering and material guiding functions, which comprises a base, a box turnover plate is rotatably arranged on the upper portion of the base, guardrails are arranged on two sides of the box turnover plate, and vertical rods are arranged at the front ends of the guardrails. First sliding sleeves are arranged on the vertical rods in a sliding mode, a supporting rod is arranged between the two first sliding sleeves, a material guiding plate is rotationally arranged on the supporting rod, a transverse rod is arranged on the first sliding sleeves, and a buffering damper is arranged between the transverse rod and the material guiding plate. And a clamping mechanism for clamping the edge of the smoke box is arranged on the guardrail. The utility model aims to provide the box turnover machine with the buffering and material guiding functions, so that the box turnover machine can be effectively prevented from being broken due to falling of tobacco leaves in the feeding process, materials are ensured to fall softly in the box turnover process, and the breakage is reduced.