6972 results about "Crank" patented technology

A seating device with a swinging device is provided. The seating device includes a seat base, a seat, an ottoman, a backrest, and two moving linkages configured to move the seating device from a first position to a second position. Moreover, the seating device includes a swinging device configured to couple between the seat base and the two moving linkages, and drive the two moving linkages to swing relative to the seat base along a front and rear direction. The swinging device includes a swinging actuator; and an eccentric transmitter is configured to transmit a swing actuation torque to the two moving linkages, where the eccentric transmitter includes a crank and a transmission arm, the crank is configured to couple with the swinging actuator, and the transmission arm is configured to couple with the two moving linkage via a universal joint device.

A crossbow with a de-cocking crank mechanism having sprockets preferably includes a cranking mechanism, which utilizes a clutch sprocket and clutch assembly axial to a drive gear, and a one-way bearing axial to a bearing sprocket to cock a crossbow. The clutch assembly includes a clutch sprocket, a flywheel surface, a friction disc, and a pressure plate. The use of a one-way bearing may control the rotation of the drive unit used to wind (take-up) an elongated connecting device. Functional properties of a crank mechanism for the winding and unwinding of the elongated connecting device such as a rope, chord or the like device for pulling a secondary object from a first position to a second position are well known in the art.

The invention relates to the technical field of robots, and discloses a waist joint driving structure of a robot, a waist driving structure of the robot, the robot and a humanoid robot. The waist joint driving structure mainly comprises a crank, a bearing, a supporting piece and a waist joint module, an output flange of the waist joint module is connected with the connecting end of the crank in an assembled mode, the supporting piece is connected to the output end of the waist joint module in an assembled mode, and the bearing with the supporting function is arranged between the supporting piece and the crank. The outer ring of the bearing abuts against the inner ring of the supporting piece, and the inner ring of the bearing abuts against the shaft sleeve on the connecting end. By means of the arrangement, the crank forms bilateral support through the bearing at the output end in the waist joint module and the bearing between the crank and the supporting piece, the problem of bias pressure can be avoided, and damage to the joint module is avoided.

A chainring assembly includes a chainring carrier adapted to be coupled to a crank arm. The chainring carrier is rotatable about a rotation axis and includes an outer periphery having carrier threads. A chainring structure includes an inner periphery having chainring threads and an outer periphery comprising a plurality of teeth. The inner periphery of the chainring structure is threadably engaged with the outer periphery of the chainring carrier. In one embodiment, a power meter device includes a body having a torque input section and a torque output section, with the torque output section including an outer periphery having threads adapted to be coupled to a chainring structure.

The invention relates to the technical field of agricultural automation, in particular to a multi-layer three-dimensional cultivation automatic transplanting robot for a plant factory, the multi-layer three-dimensional cultivation automatic transplanting robot comprises a cultivation frame, a seedling raising plate is arranged on the side face of the cultivation frame, and the robot comprises a control module, a visual module, a positioning module, a moving module and a clamping module. Comprising a clamping unit and a clamping seat, the clamping seat is fixedly connected with a moving seat, a plurality of lifting units are arranged below the clamping seat, the clamping unit comprises a clamping block detachably connected with the lifting units, a clamping motor is arranged in the clamping block, a plurality of clamping grooves are formed in the lower end face of the clamping block, and clamping jaws are movably arranged in the clamping grooves. A crank is further arranged in the clamping block, the two ends of the crank are connected with the output end of the clamping motor and the clamping jaw respectively, opening and closing actions of the clamping jaw are achieved, by means of the design, the robot can accurately clamp and release the field planting basket, and the transplanting accuracy and consistency are improved.

The invention discloses a transmission assembly assembling device which comprises a rotary disc assembly, a synchronous material taking and assembling unit, a pawl material taking and assembling mechanism, a shaft sleeve material taking and assembling mechanism, a bearing material taking and assembling mechanism, a pressing mechanism and a discharging mechanism, and the pawl material taking and assembling mechanism, the shaft sleeve material taking and assembling mechanism, the bearing material taking and assembling mechanism, the pressing mechanism and the discharging mechanism are all installed on a workbench. The synchronous material taking and assembling unit comprises a ratchet ring material taking and assembling mechanism, a crankshaft material taking and assembling mechanism and a gasket material taking and assembling mechanism which are installed on the first translation module and located above the rotary disc assembly, and a ratchet ring material conveying mechanism, a crankshaft material conveying mechanism and a gasket material conveying mechanism are arranged at the first working position of the synchronous material taking and assembling unit; the second working position of the synchronous material taking and assembling unit is matched with the third assembling positioning hole, a shaft sleeve conveying mechanism is arranged at the first working position of the pawl material taking and assembling mechanism, and a bearing conveying mechanism is arranged at the first working position of the bearing material taking and assembling mechanism. Automatic assembly can be achieved, and the assembly efficiency is improved.

An umbrella comprises a column having a middle portion; an upper nest; a lower nest; a plurality of long rods; a plurality of short rods each; a crank handle assembly disposed on the middle portion of the column. The lower nest has a plurality of first long rod grooves on a periphery of the lower nest; the crank handle assembly comprises a housing and a crank handle, correspondingly, the housing has a plurality of second long rod grooves. The umbrella of the present invention is simple and reasonable in structure, greatly reduced in size and convenience to store and carry, and reduces the cost for packaging and transportation.

The invention discloses a medium presser foot mechanism control method and a medium presser foot mechanism, and the method comprises the following steps: a control unit controls the rotation of a main shaft motor, a medium presser foot motor and a feeding motor according to a target pattern parameter, and obtains a target sewing stitch; the control unit obtains a given material pressing angle range from the expected material pressing angle range according to the cloth thickness and the sewing speed; the control unit obtains a given middle presser foot stroke from the expected middle presser foot stroke according to the cloth thickness and the middle presser foot height; according to the middle presser foot mechanism, a motor drives a crank, fisheye connectors A and B, a connecting rod, a pressing rod guide frame and other assemblies, and follow-up vertical movement of a middle presser foot is achieved. A motor is fixed through a support, an output shaft is connected with a driving crank, and the driving crank drives a fisheye connector A to be connected with a connecting rod and transmits motion to a pressing rod and a middle pressing foot. The pressing rod guide frame plays a guiding role and limits rotation of the pressing rod. The induction plate is arranged on the driving crank, when the middle presser foot is lifted to the highest point, the sensor can sense the induction plate, and position feedback is achieved.

The utility model discloses a fishing rod with a line arranged inside, which comprises a rod body, a mounting rack, an adjusting knob and a rocking handle, and the rod body is provided with a mounting groove; a transmission shaft is rotationally connected to the mounting frame in the axial direction of the rod body, a force unloading piece is arranged at one end of the transmission shaft, a winding reel sleeves a main body of the transmission shaft, one end of the winding reel abuts against the force unloading piece, a rotating shaft is rotationally connected to the mounting frame in the radial direction of the rod body, and the rotating shaft is in transmission connection with the transmission shaft and used for driving the transmission shaft to rotate; the adjusting knob is in threaded connection with the tail part of the mounting frame and is propped against the winding reel; the rocking handle is arranged in the mounting groove and comprises a driving arm, a handheld part and a supporting frame, one end of the driving arm is in driving connection with the rotating shaft, the other end of the driving arm is rotationally connected with the handheld part, the driving arm is close to the supporting frame, and the supporting frame is movably connected to the mounting frame so that the driving arm can be exposed or hidden in the mounting groove. According to the technical scheme, the stability and effectiveness of force unloading of the fishing rod with the inner line are enhanced, and the portability of the fishing rod with the inner line is improved.

The invention provides a test device for simulating ejection impact load, which is characterized in that side columns of the test device are fixedly arranged, a movement guide rail is arranged on the inner wall of each side column along the vertical direction, a variable stiffness spring is arranged below each movement guide rail, and an electromagnet is arranged at a certain height between the two side columns. The load block is connected with the electromagnet under the magnetic force effect of the electromagnet, the two ends of the load block are slidably connected with the movement guide rails, the impact force sensor is arranged on the load block, the lower bottom face of the impact force sensor is flush with the lower end faces of the two ends of the support, and the model box is arranged below the load block and filled with soil. The surface of a soil body in the model box is flush with the upper end face of the variable-rigidity spring, each crank pulley mechanism is arranged on the corresponding side column and located above the variable-rigidity spring, and after the load block impacts the soil body for the first time and bounces, limiters in the crank pulley mechanisms move to the movement guide rails to prevent the load block from impacting the soil body again.

The invention relates to the technical field of bionics, in particular to a bionic crawling device which comprises a support, a driving unit and at least one pair of crawling mechanisms, and each pair of crawling mechanisms comprises two space crank structures; a phase difference exists between actions of the two space crank structures, and the tail ends of the outer sides of the two space crank structures are located at low positions in turn to bear the support; the space crank structure comprises an inner crank, a first fulcrum and an outer crank which are sequentially connected, the driving unit is used for driving the inner crank to do conical motion, the first fulcrum is rotationally connected to the support, the inner crank is arranged in the support in a translational motion mode, and the outer crank is arranged outside the support in a translational motion mode. Each pair of crawling mechanisms can be driven to act through one driving unit, the number of driving sources is small, the production and manufacturing cost is low, the space crank structure is good in working stability and small in occupied space, use of connecting rods and exposure of unnecessary parts are reduced, the bionic crawling device can be made more refined, and the service life of the bionic crawling device is prolonged. During crawling, the fluctuation range is small, and the crawling stability is good.

A powered ratchet tool includes a housing and a motor disposed within the housing. The motor has an output shaft rotatable about a first axis. The powered ratchet tool further includes a ratchet mechanism supported by the housing and operably coupled to the output shaft to be driven by the motor. The ratchet mechanism has a crankshaft assembly defining a variable crank radius configured to change an extent of each rotational stroke of the ratchet mechanism. Moreover, the powered ratchet tool includes an output drive operably coupled to the ratchet mechanism to be rotated about a second axis perpendicular to the first axis.

The crawler-type mobile welding robot comprises a main body mechanism, a control mechanism, a welding mechanism and a welding detection mechanism, the main body mechanism comprises a chassis, crawler wheels are symmetrically installed on the two sides of the bottom of the chassis, a control cabinet is fixedly installed on the top of the chassis, and a welding mechanical arm is installed on the chassis; a crank is mounted at the tail end of the welding mechanical arm through a shaft; the control mechanism is mounted in the control cabinet; crawler wheels of the main body mechanism are adapted to complex terrains, the welding mechanism is used for executing a core welding task, and a welding mechanical arm is used for flexibly adjusting poses to be matched with a welding system in an industrial personal computer to achieve automatic welding actions; the ultrasonic detection probe is stably attached to the workpiece under the action of the first spring, an operator does not need to manually smear a coupling agent, and the ultrasonic flaw detection equipment does not need to be manually controlled for welding detection.

The utility model discloses a pipe fitting clamping mechanism, and particularly relates to the technical field of pipeline processing, the pipe fitting clamping mechanism comprises a supporting seat, a screw rod I is rotatably mounted in the supporting seat, one end of the screw rod I is connected with a hand crank outside the supporting seat, the outer side of the screw rod I is sleeved with a sliding seat in threaded connection, and the sliding seat is located on the inner side of the supporting seat; a connecting plate is arranged at the top of the sliding seat, and the connecting plate is connected with the sliding seat through a connecting assembly. Through the clamping mechanism, a bevel gear II can be driven by a motor so as to drive a double-sided gear ring to rotate, so that a plurality of bevel gears I are driven by the double-sided gear ring to drive threaded cylinders to rotate, and a plurality of threaded cylinders are driven to drive clamping plates to move; the pipeline clamping device can be suitable for clamping and fixing pipelines with different specifications and diameters, the application range is wider, and the practicability is higher; through the connecting assembly, the clamping seat and other parts connected with the clamping seat can be conveniently and integrally disassembled, and the clamping seat and the other parts can be conveniently disassembled, maintained or replaced.

The invention discloses an ornithopter with foldable wings, and belongs to the technical field of ornithopters. The device comprises a driving assembly which is symmetrically connected with a swing mechanism, the swing mechanism is connected with a flapping transmission rod, the flapping transmission rod is provided with a second inner wing connecting piece, one end of the first inner wing connecting piece is connected with the first inner wing connecting piece, and the other end of the first inner wing connecting piece is connected with the second inner wing connecting piece; the direction control assembly is connected with an output crank, and the output crank is connected with one end of an inner wing connecting piece connected to the second inner wing connecting piece. The outer wing connecting piece is connected with the outer end part of the inner wing connecting piece; the front-end main frame is connected with the rear-end main frame connecting rod; the power module is used for supplying power to the aircraft; according to the invention, the extension degrees of the wings are respectively and accurately controlled, and the flight attitude is adjusted, so that the flight is more stable, and excellent bionic performance is shown.

The utility model relates to the technical field of electrical switches, in particular to an opening and closing device of a pole-mounted switch, which comprises a shell, a sliding rod, a crankshaft and a connecting rod. The linkage control device further comprises a driving mechanism, and the driving mechanism can drive the crankshaft to swing in a limited mode so as to drive the sliding rod to be switched between the upper limit position and the lower limit position, so that the pole columns are switched between the closed state and the separated state, and the linkage control device has the advantages that linkage control over the multiple pole columns is achieved through a mechanical structure based on the crank connecting rod principle; and the reliability and the convenience of opening and closing control of the pole are greatly improved. Due to the fact that linkage control is achieved, it can be guaranteed that the pole columns can be switched to the needed working state at the same time, and the use reliability and the on-off accuracy of the pole column module are greatly improved.

The invention relates to the technical field of valves, in particular to a buffering device for a valve, which comprises a valve body, a valve core and a valve seat are arranged in the valve body, a support is detachably arranged in the valve seat, a rotating frame is rotatably arranged on the support, more than two self-adaptive rotating shafts are arranged on the rotating frame along the circumferential direction, and the self-adaptive rotating shafts are arranged along the radial direction of the rotating frame. The two ends of the self-adaptive rotating shaft are connected with the buffer blade and the swing crank respectively, the rotating frame is detachably provided with a variable-pitch damper, the variable-pitch damper is connected with the self-adaptive variable-pitch disc, the self-adaptive variable-pitch disc is provided with a limiting rail, the swing crank is in sliding connection with the limiting rail, and the spiral angle of the buffer blade is in positive correlation with the elastic force of the variable-pitch damper. According to the buffering device for the valve, by designing the buffering device capable of adaptively changing the buffering resistance and used for the valve, the problem that a valve element is prone to being damaged during valve switching is solved, and the defect that the performance of the valve is reduced due to the adverse effect of a traditional buffering structure on the flow speed and uniformity of fluid is overcome.

The utility model discloses a punching machine for power distribution cabinet production, which comprises a workbench, one side of the workbench is provided with a lubricating mechanism, the lubricating mechanism comprises a material box, the bottom of the left side of the material box is provided with a fixing pipe, one side of the fixing pipe is communicated with a frame body, one side of the frame body is movably connected with a crank shaft, and the crank shaft is movably connected with the workbench. The right side of the bottom of the workbench is fixedly connected with a double-shaft motor. According to the punching machine for production of the power distribution cabinet, the lubricating mechanism is arranged, an electric telescopic rod drives an adjusting plate to move, the adjusting plate drives a spray head to move, so that the spray head moves to the position between an upper die and a lower die, a double-shaft motor drives a crankshaft to rotate, the crankshaft drives an adjusting rod to move, the adjusting rod drives a fixing rod to move, and the fixing rod drives a sealing plate to move; when the sealing plate moves towards the inner side, the lubricating liquid can be pumped out through a fixing pipe, and when the sealing plate moves towards the outer side, the lubricating liquid can be discharged into a discharging pipe and then sprayed out through a spray head, so that the lubricating liquid makes contact with the upper mold and the lower mold.

The invention belongs to the technical field of anti-freezing solution production, and particularly relates to an automatic anti-freezing solution blending device for a hydraulic support, the automatic anti-freezing solution blending device comprises an axial position ring, a main body unit is arranged in the outer side space of the axial position ring, a regulation and control unit is arranged on the outer wall of the axial position ring, and a feedback unit is arranged on one side of the regulation and control unit; according to the invention, the change state of the interaction force between the external paddle and the flowing anti-freezing solution is fed back to the axial position ring in real time through the crank, and the deviation state between the frame type stirring paddle and the axis of the kettle body is changed in real time when the radial component force between the paddle and the anti-freezing solution is gradually increased; the method is beneficial to the non-homogenization of gaps (small near-wall side gaps and large far-wall side gaps) between the frame type stirring paddle and the inner wall of the kettle body, promotes the generation of stronger shearing force in a small-gap region, inhibits the circumferential symmetric flowing state of an anti-freezing solution in a boundary layer, and promotes the backflow of the anti-freezing solution in a large-gap region, thereby promoting the axial mixing of the anti-freezing solution and improving the stability of the anti-freezing solution. An anti-freezing liquid layer is effectively dispersed, and the swirling tendency is reduced.

The invention relates to the technical field of robots, and discloses a waist omni-directional driving assembly for a humanoid robot and the humanoid robot, the waist omni-directional driving assembly for the humanoid robot comprises a base, a driven shaft, a cross shaft universal joint, two waist omni-directional joint modules and two crank rocker mechanisms; the two waist omni-directional joint modules are rotatably connected with the two ends of the second rotating shaft respectively, the two waist omni-directional joint modules are coaxially arranged and approximately symmetrically distributed on the two sides of the second rotating shaft, motors of the two waist omni-directional joint modules are arranged adjacently, the output ends of speed reducers are arranged oppositely, and the second rotating shaft is parallel to the driven shaft; crank parts of the two crank and rocker mechanisms are fixedly connected with output flanges of the two speed reducers respectively, and rocker parts of the two crank and rocker mechanisms are hinged to the two ends of the driven shaft respectively. Effective transmission force arms at the two ends of the equivalent lever under the working condition of trunk roll motion are prolonged, the torque output requirement for the joint module is reduced, and the control precision is improved.

The invention discloses a line drive type biped robot leg structure which comprises a thigh support, a knee joint motor is arranged at the lower end of the thigh support, a shank support is connected to an output shaft of the knee joint motor, a foot assembly is movably connected to the lower end of the shank support and comprises a foot fixing piece, and a heel is connected to the rear portion of the foot fixing piece. The heel is connected with a line driving structure, the line driving structure comprises a first ankle joint motor, a second ankle joint motor, a first driving line wheel, a second driving line wheel, a first ankle joint line wheel and a second ankle joint line wheel, and a first transmission line is arranged between the first driving line wheel and the first ankle joint line wheel; a second transmission line is arranged between the second driving line wheel and the second ankle joint line wheel, a first crank swing rod structure is arranged between the first ankle joint line wheel and one side of the heel, and a second crank swing rod structure is arranged between the second ankle joint line wheel and the other side of the heel. The device has the advantages of being simple in structure and good in adaptability.

The embodiment of the invention provides a three-degree-of-freedom waist structure and a humanoid robot, and relates to the technical field of humanoid robots. The three-degree-of-freedom waist structure of the humanoid robot comprises a first joint mounting piece and a second joint mounting piece. And a waist turnover joint is arranged in the first joint mounting piece. The output end of the waist turnover joint is connected with the robot lower limb structure. And the second joint mounting piece is rotationally connected with the first joint mounting piece. And a waist side-sway joint and a waist pitching joint are arranged in the second joint mounting piece. The waist side-sway joint and the waist pitching joint are sequentially arranged in the direction of the output shaft of the waist pitching joint. And the output end of the waist side sway joint is connected with the first joint mounting piece through a crank connecting rod mechanism. The output end of the waist pitching joint is connected with the robot chest structure. A full series connection mode can be adopted, the whole structure is compact, the structure is prevented from being bloated, good structural rigidity is achieved, kinematics calculation and control of the series connection structure are simple, and the motion control difficulty is reduced.

A dual-mode landing gear adapter enables rapid interchangeability between manual and powered operation for trailer landing gear extension and retraction. The adapter includes a gear shaft adapter having a first coupling end structured to securely engage the trailer's landing gear gearbox shaft, and an opposite second coupling end with axial slots configured for receiving a two-pin anchor. A manual crank and a drill head attachment each include a corresponding two-pin anchor for secure, selective coupling with the adapter. The drill head attachment further comprises a cylindrical collar structured to securely receive a standard electrically powered drill / driver, secured via a cotter pin or similar fastening device. The invention facilitates quick, secure switching between powered and manual operation without tools, ensuring convenience, safety, and operational flexibility. This adapter system reduces user effort, increases efficiency, and provides robust reliability under varying operational conditions common in commercial trucking and trailer applications.

The invention provides a CFD-EDM-based pulse jet power-assisted on-film precision seeding device and a design method, the CFD-EDM-based pulse jet power-assisted on-film precision seeding device comprises a hole making device and a seed sowing device which are arranged in parallel, the hole making device comprises a bottom plate, a motor fixed on the bottom plate through a bracket, a crank fixedly connected with the motor and a first connecting rod hinged with the crank, the device further comprises a second connecting rod, a third connecting rod and a fourth connecting rod. The tail end of the fourth connecting rod is connected with a guide rod. A drill bit is fixedly connected to the guide rod; the seed-metering device comprises a shell, a seed-metering wheel and a blocking wheel, the seed-metering wheel is rotationally connected with the shell, one side of the seed-metering wheel is attached to the inner wall of the shell, and a plurality of nest holes are formed in the seed-metering wheel; a seeding opening is formed in the bottom of the shell, and a cycloid guide rail and an air injection pump are arranged at the seeding opening. According to the invention, the cooperative working mode of the hole making device and the seed metering device is comprehensively considered, and the seed metering success rate of seeds with small and medium particle sizes can be obviously improved through simulation optimization design, so that the seed filling is stable, and the seed metering is uniform.

The invention discloses a cushion block for realizing differential pushing of a curved bridge of a common walking jack, which comprises a first cushion block and a second cushion block, the first cushion block and the second cushion block are respectively arranged on the walking jack on the inner side and the outer side of the bottom surface of a main beam of the curved bridge, and the first cushion block comprises a first bearing plate; the first bearing plate is placed in the sliding block and can rotate freely. The sliding block is placed in the base, can horizontally move in any direction in the horizontal plane and can automatically reset, the position of the sliding block is adjusted through the crank, and the differential distance in the differential pushing process is achieved. The second cushion block comprises a second bearing plate and a sleeve, the second bearing plate is placed in the sleeve, the structure of the second bearing plate is the same as that of the first bearing plate, and the second bearing plate can rotate freely. The bent bridge differential pushing device can adapt to beam body rotation, transverse displacement and longitudinal differential displacement in the differential pushing process, bent bridge differential pushing can be achieved through an oil pump control system of a common walking type jack, and the ideal state that deviation rectification is almost not needed theoretically is achieved.

According to the forest and fruit tree body profiling flapping fruit harvester based on the special-shaped crankshaft structure, transmission is achieved through special-shaped crankshafts with different crank throw eccentricity degrees, and the movement amplitude of flapping strips is limited through the inner side edges of amplitude limiting plates; the purpose that the flapping strips are arranged in a manner of imitating the contour of a tree crown can be achieved while the flapping strips are flapped, the flapping strips are arranged in a shape of imitating a tree shape, missed flapping of the top of the tree crown and the pole position of the symmetry axis is avoided, and the net picking rate of different positions is increased. The device comprises a chassis vehicle body and a tree-like flapping device, in the tree-like flapping device, a crankshaft with a plurality of crank throws is rotationally arranged on a base, and the eccentric distances of the crank throws are different; the lower end of each beating strip is hinged to a crank throw of the crankshaft; opposite amplitude limiting plates are arranged on the higher parts of the two sides of the base, and an amplitude limiting hole is formed between the opposite inner side edges of the two amplitude limiting plates; the distance between the inner side edges of the two amplitude limiting plates close to the center of the amplitude limiting plate in the direction parallel to the axial direction of the crankshaft is smaller than the distance between the inner side edges of the two amplitude limiting plates close to the two ends of the amplitude limiting plate.

The invention discloses a handheld Chinese prickly ash picking machine, relates to the technical field of Chinese prickly ash harvesting, and aims to solve the problems of long idle running time and low picking efficiency of a picking cutter of an existing picking machine. Comprising a box shell, a handle, a cutter, a motor and a crank and rocker mechanism, a battery is arranged on the handle, the box shell is located at the front end of the handle, fruit combing teeth are arranged at the front end of the box shell, the cutter is located above the fruit combing teeth, the motor is fixed to the box shell, and the crank and rocker mechanism comprises a crank, a rocker and a connecting rod. The first end of the crank is fixedly connected with an output shaft of the motor, the second end of the crank is hinged to the middle section of the connecting rod, the first end of the rocker is rotationally connected with the box shell, the second end of the rocker is hinged to the first end of the connecting rod, and the second end of the connecting rod is fixedly connected with the cutter. By means of the pulling-cutting-pushing-quick-return movement mode, the no-load movement time of the cutter is shortened, the no-load operation time is short, the cutter can be quickly reset, and then the picking efficiency is improved.

The diaphragm pump includes a pump casing, a crank mechanism attached to the pump casing, and a diaphragm assembly connected to the crank mechanism. The diaphragm assembly has a diaphragm and a center plate retaining an inner peripheral portion of the diaphragm. The center plate has a first retaining member having a fitting recess, and a second retaining member having a fitting projection press-fitted into the fitting recess. The center plate clamps an inner peripheral portion of the diaphragm between the first retaining member and the second retaining member. A screw for securing the center plate is installed through insertion holes extending through the fitting recess and the fitting projection, respectively. The inner diameter of the fitting recess and the outer diameter of the fitting projection are larger than the insertion holes.

Examples of a door handle assembly are disclosed. The door handle assembly has a frame, a handle, a push-push assembly, and a bell crank. The frame has a housing portion and a cavity and is mountable to a door. The handle is disposed in the cavity and pivotably coupled to the frame. The push-push assembly is positioned with a longitudinal axis thereof substantially orthogonal to the handle. The bell crank is pivotably mounted to the frame and operably coupled to the handle and also in cooperative coupling with the push-push assembly. The bell crank has a primary profile having a slanted shape engaged with the push-push assembly to move the push-push assembly between discharged and recharged conditions.

The invention relates to the technical field of cleaning of cutting equipment, in particular to a cleaning device for a band sawing machine. Rotation is transmitted to a rotating rod through a bevel gear set, through meshing transmission of a transmission gear and a rack, a mounting column is pushed to drive a scraping plate to move transversely, then the scraping plate abuts against a cutting saw blade for scraping, the scraping plate abuts against the cutting saw blade, and chippings on the surface of the cutting saw blade are scraped away; after materials are detected through an infrared grating sensor, an electric signal is sent to a control cabinet, a servo motor is triggered to drive a crank to drive a sliding rod to annularly rotate, the sliding rod is rotationally connected with a connecting rod through a lantern ring, and a mounting base is pulled to enable a striker plate to swing in an arc shape; and the mounting base can only rotate with the rotating shaft as the circle center, so that one end of the mounting base drives the material blocking plate to only swing downwards in a reciprocating mode, chippings, close to the material guiding shell, of the edge of the material blocking plate slide down towards the middle, and the chippings can be conveniently cleaned.