133results about How to "Open and close smoothly" patented technology

The invention relates to the field of circuit breakers, in particular to a primary and secondary fusion pole-mounted circuit breaker which comprises a primary and secondary fusion circuit breaker body, the primary and secondary fusion circuit breaker body comprises a fixing frame, a bottom bin is installed on the rear portion of the fixing frame, bottom columns are arranged in the bottom bin, and bottom grooves are formed in the bottoms of the bottom columns; one side in the bottom groove is in meshed connection with a tooth column, the tooth column is fixedly connected to the middle of the periphery of a rotating shaft, the rotating shaft is rotationally connected to the middle in the bottom bin, the two ends of the periphery of the rotating shaft are fixedly connected with connecting gears through pneumatic expansion heads, and a first branching part and a second branching part are installed on the two portions in the bottom bin correspondingly; through mutual energy storage of the first tapping part and the second tapping part, automatic energy storage work can be achieved, compared with traditional equipment, use of a reset motor is omitted, line arrangement is reduced, meanwhile, electric field interference to the circuit breaker when the reset motor works is avoided, the occurrence rate of abnormity is reduced, and circuit safety is facilitated.

The invention belongs to the technical field of cutting beds, and particularly relates to an integral opening and closing structure of a direct-drive type punching drill, which comprises a rack, the end part of an air cylinder fixing seat is rotatably connected to the rack, a locking mechanism is arranged between the air cylinder fixing seat and the rack, an air cylinder and a guide sleeve are arranged above the air cylinder fixing seat, and a punching drill assembly comprises a motor fixing plate, a hollow motor is arranged on the motor fixing plate, a hollow drill is connected to the lower end of a hollow rotating shaft of the hollow motor, the ejector rod penetrates through the hollow rotating shaft and extends into the hollow drill, and during normal punching work, the locking mechanism locks the air cylinder fixing base and the rack, and the air cylinder fixing base is fixed to the rack; when replacement and maintenance are needed, the locking mechanism is unlocked, and the punching drill assembly can be opened towards the side away from the rack. When replacement and maintenance are needed, enough operation space is reserved between the punching drill assembly and the cutterhead, an operator can operate flexibly, and the operator can replace a cut-off knife and a drill bit conveniently; and the structure is compact, interference with a cutterhead located below the rack is avoided, and the device is suitable for the automatic cutting bed.

The invention provides foldable electronic equipment and a screen assembly. The electronic equipment comprises a screen, a rotating shaft assembly, a first shell, a second shell and an elastic assembly. And the elastic part of the elastic component is made of an elastic material or a non-Newtonian fluid material. And the supporting part of the elastic component is made of a rigid material. The electronic device has an open state and a closed state. When the electronic equipment is in an open state, the elastic assembly is flattened. The screen, the elastic assembly and the rotating shaft assembly are stacked in the thickness direction of the electronic equipment. The elastic part and the supporting part are stacked in the thickness direction of the electronic equipment. The first part of the elastic component is lapped with the first connecting part of the rotating shaft component, and the second part is lapped with the second connecting part of the rotating shaft component. When the electronic equipment is in a closed state, the elastic component is bent, the first part of the elastic component is lapped on the first connecting part, and the second part is lapped on the second connecting part. The falling reliability of the screen of the electronic equipment is high, and the rebound force is small.

The invention discloses a method for opening and closing a radial gate through a hydraulic hoist and an opening and closing system thereof.The opening and closing system for opening and closing the radial gate through the hydraulic hoist comprises a pre-buried gate table, a mounting side table and the radial gate. The bottom of the radial gate is supported by buoyancy of a water body, the buoyancy of the water body assists the rotating shaft part to smoothly lift the radial gate from the water body, when the radial gate is gradually separated from the water body, water in the water storage cavity in the buoyancy box can be rapidly discharged through the air inlet valve pipe, and when the radial gate is inserted into the water body, the radial gate is subjected to pressure from the water body; in order to influence the closing of the radial gate by pressure, due to the support of the buffer spring piece, the power-assisted wheel part mounted on one side of the buffer spring piece can abut against one side of the radial gate, so that the influence of the pressure on one side of the radial gate is reduced, and the smooth resetting of the radial gate in the closing process is ensured.

The invention discloses gun-type lymph node forceps with openings perpendicular to opening and closing of forceps handles, and belongs to the technical field of medical instruments. According to the technical scheme, the forceps comprise forceps bodies, forceps handles, forceps heads and a sliding block, the forceps bodies comprise the lower forceps body and the upper forceps body, the forceps handles comprise the movable forceps handle and the fixed forceps handle which are oppositely arranged, the fixed forceps handle is fixed to the lower forceps body, the rear end of the upper forceps body is hinged to the sliding block, and the sliding block is connected with the movable forceps handle; the forceps head comprises a fixed forceps head and a movable forceps head, the fixed forceps head is fixed on the lower forceps body, and the movable forceps head is hinged with the upper forceps body. The gun type lymph node forceps have the beneficial effects that the gun type lymph node forceps are efficient and accurate in clamping capacity, stable in guiding mechanism, high in opening and closing stability, of a pistol loading type structure, flexible in hinge structure, smooth in opening and closing experience, compact in operation design and safe and reliable in performance; and great convenience and guarantee are provided for surgical operation of small tissues such as lymph nodes and the like.

The invention discloses feeding, welding and discharging integrated welding equipment which comprises a workbench, a first feeding device, a spot welding paste mechanism, a second feeding device, a welding mechanism and a discharging device, a rotating disc assembly is arranged on the workbench, a set of machining stations are arranged on the rotating disc assembly, each machining station is provided with an overturning type jig, and the overturning type jigs are arranged on the workbench. The workbench is provided with a first feeding station, a spot welding paste station, a second feeding station, a jig positioning station, a welding station and a discharging station. The first feeding device, the spot welding paste mechanism, the second feeding device, the welding mechanism and the discharging device are arranged on one side of the rotary disc assembly and arranged on a first feeding station, a spot welding paste station, a second feeding station, a welding station and a discharging station correspondingly. The whole equipment is optimized, automation of feeding, paste dispensing, upper and lower station alignment, welding and discharging is completely achieved, and the production efficiency of the equipment is effectively improved.

The invention provides a shell, a manufacturing method thereof and electronic equipment. The shell is used in the electronic equipment. The shell comprises a frame body, a rubber coating and a supporting block. The frame body is provided with a first installation groove, an opening of the first installation groove is located in the top face of the frame body, and the first installation groove penetrates through the side face of the frame body. The supporting block is fixedly connected to the groove bottom wall of the first mounting groove and comprises a supporting face facing an opening of the first mounting groove, and the supporting face is used for supporting a rotating shaft of the electronic equipment. The rubber coating is formed in the frame body, at least part of the rubber coating is located in the first installation groove, the rubber coating is provided with a second installation groove, an opening of the second installation groove is located in the top face of the rubber coating, the supporting face is exposed relative to the groove bottom wall face of the second installation groove, and the second installation groove penetrates through the side face of the rubber coating and is used for installing a rotating shaft. The shell provided by the invention can solve the technical problem that the rotating shaft of the electronic equipment in the prior art is easy to rub with the middle frame.

The utility model discloses a kind of photo albums with video function, including cover, top plate, magnetic attraction piece, T type support pole, T type support foot, cover side is connected with bottom cover by cover spine, top plate is connected by folding portion between bottom cover, top plate top is equipped with mounting groove and is equipped with display screen in mounting groove, lithium battery and video storage chip are equipped in top plate, magnetic attraction piece is located in cover and top plate, photo album is innovatively integrated with display screen, not only can play the photo in video storage chip, can also play video, when user peruses photo album, not only can see familiar paper photo on inner page, can also review dynamic image moment through display screen, and photo album still retains the cover, bottom cover and inner page structure of traditional photo album, user can continue to place paper photo therein, give consideration to the emotional dependence of people to traditional photo album;While incorporating modern electronic technology, the display of dynamic image is realized, greatly enrich the use experience of viewer.

The present invention is a casting mold with an adjustable guide key, comprising a mold bottom plate, a left mold plate and a right mold plate respectively arranged on the left and right sides of the top surface of the mold bottom plate, four columns respectively distributed at the four corners of the casting cavity are connected to the top surface of the mold bottom plate, and a guide key assembly is connected to the side of the column facing the casting cavity. The present invention replaces the guide key and the keyway with a guide key assembly. After the present invention adopts the adjustable guide key assembly, after the mold is heated, the matching clearance of the mother key and the wedge key can be adjusted to the required range, ensuring the smooth opening and closing of the left mold and the right mold, and preventing the casting from being strained and deformed.

The utility model provides a mixing device for polyethylene raw materials, and belongs to the technical field of machinery. The problem of poor stability in the prior art is solved. The mixing device for the polyethylene raw materials comprises a rack and a box body, a cavity is formed in the box body, an opening is formed in the upper end of the box body, the box body is fixedly connected to the rack, a discharging port is formed in the bottom of the box body and located in the middle of the rack, an opening and closing mechanism capable of opening and closing the discharging port is arranged at the discharging port, and the mixing device further comprises a crawling ladder and a base. The crawling ladder is fixedly connected to the outer side of the box body, and the base is fixedly connected to the bottom of the rack and can make contact with the ground in a large area. The polyethylene raw material mixing device is high in stability.

The utility model relates to the technical field of doors and windows, in particular to a safe anti-toppling hotel lobby ultrahigh door which comprises a door body, a door frame and a cleaning assembly, and the cleaning assembly comprises a spraying plate, a cleaning brush, a cleaning box and a water conveying piece. The door frame provides installation conditions for the cleaning assembly and decorates and beautifies the gate body, when the cleaning assembly is used, the water conveying piece, the spraying plate and the cleaning brush are started through the controller, the water conveying piece operates to guide cleaning liquid into the spraying plate, the spraying plate sprays the cleaning liquid to the gate body, and finally the cleaning brush stretches out and draws back to clean the cleaning liquid and dust on the gate body. The high position of the gate body is cleaned, other positions, such as the lower portion of the gate body or the door handle, of the gate body are still manually cleaned, the high position of the gate body can be easily cleaned through the design of the cleaning assembly, and the phenomenon that dust is accumulated at the high position of the gate body is avoided.

The utility model provides a circular arc door guiding limit moving structure which comprises a door pocket, top rails and a second door body, the top of the door pocket is provided with a set of top rails used for limit moving of the first door body and the second door body, and the bottom of the door pocket is provided with a set of ground rails used for limit moving of the first door body and the second door body. The top rail fixing structure comprises a door pocket, the left side and the right side of the door pocket are respectively provided with a set of fixing frames used for being connected with a top rail in a limiting mode, and the cross section of the front side view of each fixing frame is of a rectangular structure. The supporting back frame and the adjusting rail are embedded through an I-shaped structure to ensure vertical precision, when the adjusting sliding seat moves up and down along the adjusting rail, the relative position of the supporting back frame and the arc rail is fixed through bolt holes, when the door body runs, the guide wheels roll along the curved surface of the arc rail, the limiting blocks are matched with the limiting layers to prevent derailing, and the ground rail and the top rail synchronously guide the door body to move horizontally.

The utility model relates to the technical field of machining auxiliary equipment, in particular to a shaft part nitriding tool which comprises a nitriding furnace main body, a first air cylinder is arranged on one side of the nitriding furnace main body, a top cover is arranged above the nitriding furnace main body, and a fixing plate is fixedly installed on a side edge plate body of the top cover. The tail end of a telescopic shaft of the first air cylinder is detachably installed on the fixing plate, a driving motor is fixedly installed at the center of the top face of the top cover, a rectangular rod is installed at the tail end of an output shaft of the driving motor, a second air cylinder is arranged at the bottom of the nitriding furnace body, and a telescopic shaft of the second air cylinder penetrates into the nitriding furnace body and is detachably provided with a supporting base. And a convex column is rotationally connected to the center position of the supporting base, a mesh cylinder is installed at the top end of the convex column, a center column is fixedly installed at the center position of the mesh cylinder, a rectangular insertion hole is formed in the center column, and the rectangular rod is matched with the rectangular insertion hole in an inserted mode. The dynamic nitriding device is convenient for dynamic nitriding operation and is beneficial to improving nitriding quality.

The embodiment of the present invention discloses an industrial sewing machine that is easy to assemble, including a sewing machine head, a base, a feeding mechanism, an upper and lower shaft synchronization mechanism and a needle feed dog synchronization mechanism, wherein the upper and lower movement of the needle of the sewing machine head is driven by the upper shaft, and the forward and backward swing is driven by the feed shaft; the rotary shuttle of the base is driven by the lower shaft, and the feed dog is driven by the transition shaft; the upper shaft and the lower shaft are linked by the upper and lower shaft synchronization mechanism, and the feed shaft and the transition shaft are linked by the needle feed dog synchronization mechanism; the transmission paths of the upper and lower shaft synchronization mechanism and the needle feed dog synchronization mechanism all pass through the bracket behind the needle and the support seat on one side of the bracket; the feeding mechanism is arranged behind the needle for transmitting cloth. The present invention can realize the simultaneous sewing of mattress fabric and both sides of the chain, improve sewing efficiency, and at the same time ensure the symmetry of the cloth on both sides, so that the zipper opens and closes smoothly.

An optimized opening and closing structure of an embedded hinge includes a hinge cup and a bracket that are hinged to each other for opening and closing through a connecting arm assembly, and an elastic member and a damper are provided on the bracket; the connecting arm assembly includes at least an outer connecting arm, which is hinged to the hinge cup and the bracket respectively, and is provided with an elastic action part and an adapter; when the hinge cup is hinged to open and close to a certain position relative to the bracket, the outer connecting arm interacts with the elastic member through the elastic action part to achieve elastic hinged opening and closing between the hinge cup and the bracket; when the hinge cup is hinged to close to a certain position relative to the bracket, the outer connecting arm acts through the adapter and drives the damper to generate a damping force to achieve damped hinged closing between the hinge cup and the bracket. Through the improvement of the above structure, the elastic action force generated by the elastic member and the damping force generated by the damper can be applied to the outer connecting arm, so that the generation of the elastic action force and the damping force is more direct, allowing the hinge to withstand a larger load-bearing capacity and generate better damping buffering force when closed.

This utility model relates to a sliding cover type FPC connector, including a base and a slider slidably connected to the base. The base has sliding grooves extending along the insertion direction on both sides. The slider has guide arms that slidably engage with the sliding grooves. The groove walls have recesses, and elastic arms are installed within these recesses. A locking block is located at the free end of the elastic arm, and a corresponding slot is provided on the guide arm. A slot is located in the middle of the base along its width direction. An insert plate extends into the slot on the slider. Limiting grooves are spaced apart within the slot, and terminals are installed within these grooves. Through the design of the locking block at the free end of the elastic arm engaging with the inclined surface of the guide arm's slot, when the slider is pulled, the inclined surface of the slot pushes the locking block, causing the elastic arm to deform, and the locking block naturally exits the slot to unlock. When the slider is pushed to the locked position, the elastic arm automatically resets, and the locking block precisely engages with the slot to form a stable lock, effectively preventing accidental sliding of the slider.

The utility model discloses a kind of angle type conical energy dissipation valves, comprising: valve body (1), valve stem (2), conical valve core (3), conical valve seat (4), water inlet end (5) and water outlet end (6), the water outlet end is equipped with the water flow impact cylinder (7) of conical valve seat fixed connection and with water outlet end inner wall gap cooperation, the bottom of the water flow impact cylinder is equipped with the conical energy dissipation cylinder (8) of upper big and lower small of water outlet end inner wall fixed connection.The utility model has the beneficial effect that a threaded valve stem is connected with cone, the up and down movement of valve stem drives the movement of conical valve core to adjust flow, and the annular water flow is almost not shaken due to vertical downward, with long service life;When water flow passes through conical valve core through guide plate, it forms annular flow cross-section impact water flow impact cylinder, and conical energy dissipation cylinder together to achieve energy dissipation effect.

The utility model relates to the technical field of pipettes, in particular to a pipette with a heat preservation device, which comprises an outer cylinder, two ends of the outer cylinder are respectively in threaded connection with a first mounting seat and a second mounting seat, and a pipette body is further arranged in the first mounting seat; the sealing assembly is arranged on one side of the external pipe in a sleeving manner, and the sealing assembly is used for sealing when liquid is sucked into the transfer pipette body; and the driving assembly is arranged on one side of the interior of the first mounting base, and the driving assembly is used for driving the sealing assembly to be opened and closed. Compared with the prior art, by arranging the driving assembly, manual intervention of an operator is reduced, the operation efficiency is improved, stable opening and closing of the sealing assembly are ensured through synchronous rotation between the driving wheel and the driven wheel, and misoperation or liquid leakage caused by asynchronous rotation is avoided; and the stability and the reliability of experimental operation are improved.

The utility model discloses a vehicle charging socket, comprising a socket main body, the socket main body is provided with a charging port, the charging port is internally provided with a plurality of lead jacks, the charging port is used for butt joint with a charging plug, the socket main body is internally provided with a sliding member and a protection door, and the sliding member is provided with a plurality of lead jacks. The sliding piece is arranged on the socket main body and is in transmission connection with the protection door; the protection door is arranged in the socket main body in a sliding manner so as to close or open the wire jacks in the sliding process; the sliding piece is provided with a mistaken opening part, the protection door is provided with a limiting part, and the mistaken opening part stops the limiting part, so that the protection door is located at the position where the wire jack is closed; the sliding piece moves to relieve the stopping state of the mistaken opening part and the limiting part, then the sliding piece drives the protection door to slide, and the wire jack is opened. The unlocking device has the advantages that the mistaken opening part and the limiting part are arranged in the scheme and are arranged on the sliding piece and the protection door respectively, unlocking and driving of the protection door to be opened are achieved through the sliding piece, when the sliding piece moves, unlocking is conducted firstly, then the protection door is pushed to move, the unlocking step and the pushing step are more coherent, and the unlocking effect is better. And moreover, the situation that the positions of the two sliding parts need to be accurately controlled in the prior art is avoided, so that the mounting precision is also reduced, and the assembly efficiency is favorably improved.

This utility model discloses a cable laying track robot, including a main body. Track walking mechanisms are respectively installed at both ends of the bottom of the main body. A rotary motor is installed on the upper part of the main body. The output shaft of the rotary motor is connected to a supporting base plate. The outer end of the supporting base plate extends outward from the main body. A first electric telescopic rod is installed on the supporting base plate. One end of the first electric telescopic rod located inside the supporting base plate is connected to a telescopic drive motor, and the other end is connected to a gripping assembly through a gripping drive mechanism. This utility model ensures stable movement on complex tracks and avoids the risk of derailment by combining an anti-detachment plate with a magnet. The smooth opening and closing of the gripping plate is achieved through the linkage of pulleys, a U-shaped push rod, and a drive slide. Combined with a semi-circular gripping groove and an anti-slip pad, it can adapt to cables of different diameters, providing uniform gripping force and anti-slip properties.

The utility model discloses a kind of tobacco leaf boxing packing workstations, including rack, tobacco frame conveying device, tobacco frame turnover mechanism, packaging box conveying device and tobacco leaf compaction mechanism. Tobacco frame conveying device is located on the upper portion of rack, for input full load tobacco frame and output empty tobacco frame, it includes interval arrangement and form the input of blanking port, output conveyor belt. Tobacco frame turnover mechanism is equipped with two, respectively corresponding input conveyor belt and blanking port, each turnover mechanism includes by the drive swing arm driven turnover frame, and tobacco frame clamping release mechanism, cover plate and cover plate turnover mechanism installed on it, reliable clamping and turnover tobacco frame are carried out automatic unloading. Packaging box conveying device is located in the lower portion of rack to receive tobacco leaf. Tobacco leaf compaction mechanism is used to compact tobacco leaf in box. The utility model realizes the full-automatic, continuous transfer and packaging of tobacco leaf from tobacco frame to packaging box, greatly improves operation efficiency, reduces labor intensity.

The utility model relates to a waste heat recovery regulator of a waste heat boiler, which is arranged in a heat insulation layer in the waste heat boiler and is provided with a central pipe with one end filled with high-temperature tail gas, the other end of the central pipe is axially and fixedly connected with a lengthening pipe, the lengthening pipe is connected with a rectifying sleeve, and long-waist-shaped exhaust windows are uniformly distributed on the peripheral surface of the rectifying sleeve in the circumferential direction. A valve element assembly is arranged in the rectifying sleeve in a sliding mode and provided with a valve element which is pressed tightly or far away from the end face of the lengthened pipe to adjust the high-temperature tail gas discharge amount, and the periphery of the valve element is in sliding fit with an inner hole of the rectifying sleeve. The actuating mechanism is rotationally connected with the rear end of the valve rod through a swing arm to push the valve element to move far away from or close to the end face of the lengthened pipe. The lengthened pipe is fixedly connected to the central pipe in the axial direction, so that the overall length of the valve element assembly is shortened, and the overall weight of the valve element assembly is reduced; meanwhile, guide structures are arranged at the front end and the rear end of the valve element assembly respectively, abrasion generated in the valve element moving process can be effectively reduced, and smooth opening and closing of the valve are guaranteed.

The utility model relates to the technical field of mechanical equipment, in particular to a plane boosting force hinge. The plane boosting force hinge comprises a plane outer hinge and a plane inner hinge; pin holes are formed in one end of the out-of-plane hinge and one end of the in-plane hinge, and hinge installation is achieved at the position where the pin holes are formed in one end of the out-of-plane hinge and the position where the pin holes are formed in one end of the in-plane hinge through the matching effect of pins and the boosting force bearing assembly. According to the plane boosting force hinge, a boosting force bearing assembly structure is additionally arranged on the basis of an original hinge structure, and an arranged boosting force bearing assembly comprises a bearing seat, a ball and a bearing cover; after the whole plane boosting force hinge is additionally provided with the totally-closed thrust bearing, the plane boosting force hinge is smoothly opened and closed in a high-bearing state, and the force is small; meanwhile, abrasion and friction sound do not occur after multiple heavy load tests, and the locking phenomenon does not occur after regular refueling.

The utility model discloses a sound insulation window, which relates to the technical field of sound insulation windows and is characterized in that when the sound insulation window is used, firstly, a user installs a sound insulation window shell on a window of a house near a busy block and a road, and when the sound insulation window is normally used, a glass frame is in a closed state; the sound insulation window shell and the glass frame are usually made of metal, aluminum alloy, plastic steel and other materials and have good sound insulation and heat insulation performance, the laminated glass and the sound insulation film in the glass frame are tightly connected to form an effective sound insulation barrier, the sound insulation film is usually made of PVB and other materials, and therefore the sound insulation window has good sound insulation and heat insulation performance, and the service life of the sound insulation window is prolonged. The effective sound insulation effect can be achieved, and the comfort level of the living environment is improved; when ventilation needs to be started, a user holds the handle to push the handle to the front side, the connecting piece is installed on the surface of the ball bearing and connected with the glass frame, when the handle is pushed to the front side, the ball bearing can be stressed to slide, and the connecting piece slides along the surface of the ball bearing.

The application provides a foldable electronic device and a screen assembly. The electronic device comprises a screen, a rotating shaft assembly, a first housing, a second housing and an elastic assembly. The material of the elastic part of the elastic assembly is an elastic material or a non-Newtonian fluid material. The material of the supporting part of the elastic assembly is a rigid material. The electronic device has an open state and a closed state. When the electronic device is in the open state, the elastic assembly is flat. The screen, the elastic assembly and the rotating shaft assembly are stacked in the thickness direction of the electronic device. The elastic part and the supporting part are stacked in the thickness direction of the electronic device. The first part of the elastic assembly overlaps the first connecting part of the rotating shaft assembly, and the second part overlaps the second connecting part of the rotating shaft assembly. When the electronic device is in the closed state, the elastic assembly is bent, the first part of the elastic assembly overlaps the first connecting part, and the second part overlaps the second connecting part. The screen drop reliability of the electronic device is high, and the rebound force is small.

The utility model discloses a delivery door of a recycling bin, which relates to the technical field of garbage recycling and comprises a first door body, a second door body, a driving device, an anti-pinch device and a guide mechanism, the first door body is rotatably connected with the second door body, the first door body is provided with the anti-pinch device, and the second door body is provided with the guide mechanism. The driving device is installed on the side wall of the recycling box and connected with the anti-pinch device, and the lower end of the second door body is connected with the side wall of the recycling box through a guide mechanism. According to the delivery door, the first door body and the second door body are arranged, and the first door body and the second door body can rotate relative to each other, so that the electric driving device with a short stroke can be selected to achieve a large opening and closing stroke, and compared with a long electric driving device consistent with the opening and closing stroke of the delivery door in a traditional design, the delivery door has the advantages of being simple in structure and convenient to use. According to the utility model, the purchase cost of the electric driving device is reduced.

The invention discloses a large-format heavy-duty lifting window, comprising a window frame, a fixed window, a movable window, a support assembly, a steel wire, a counterweight module, a dual-output shaft motor and a synchronous belt, wherein a fixed window is provided at the lower part of the window frame, a movable window is provided outside the fixed window, a support assembly is installed at two corners above the window frame, a synchronous wheel is installed on the support assembly, a dual-output shaft motor is installed in the window frame between the two support assemblies, the dual-output shaft motor is connected to the corresponding synchronous wheel through a synchronous belt, limited wheels are installed on both sides of the synchronous wheel, a steel wire is installed on the limited wheel, one end of the steel wire is connected to the movable window, and the other end of the steel wire is connected to the counterweight module. The invention can reduce the deadweight of the window sash by arranging the support assembly in the window frame and supporting the movable window and the counterweight module through the support assembly, so that when the window sash is in use, the dual-output shaft motor can drive the window sash to open and close smoothly by outputting a relatively small power; the hardware accessories are integrated on the support assembly, so that the internal layout of the lifting window can be more concise.

The utility model relates to the technical field of clamping and pressing tools, in particular to a tool for opening a nut shell. Comprising a first jaw, a first handle, a second jaw, a second handle, a first nut, a second nut, a screw and a spring. The first jaw is arc-shaped and is integrated with the first handle; a first boss integrated with the first handle is arranged on the first handle, and a first mounting hole is formed in the first boss; the second jaw is arc-shaped and is integrated with the second handle; a second boss integrated with the second handle is arranged on the second handle, and a second mounting hole is formed in the second boss; the first nut is mounted in the first mounting hole, the second nut is mounted in the second mounting hole, one end of the screw is in threaded connection with the first nut, and the other end of the screw is in threaded connection with the second nut; the inner sides of the first jaw and the second jaw are provided with clamp teeth, and the outer ends of the first jaw and the second jaw are hinged; and the spring is sleeved on the first boss, the second boss and the screw rod. And nut kernels are ensured to be intact when nut shells are broken.