263 results about "Jackshaft" patented technology

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.

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 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 utility model relates to a compression mechanism of a grass material square bundle bundling machine, and belongs to the technical field of agricultural machinery. The compression mechanism comprises two cranks, a crank shaft, a crank shaft end cover and a bracket bearing seat, the connecting rod comprises a plurality of U-shaped channel steel frames, a front end plate, a reinforcing plate and a rear end plate; the small piston comprises two side push blocks, a plurality of middle push blocks, an upper cross beam, a lower cross beam, a connecting rod fixing sleeve and a connecting rod connecting plate; the large piston comprises two side pushing blocks, a plurality of upper middle pushing blocks, a plurality of lower middle pushing blocks, an upper cross beam and a lower cross beam; the piston combination and separation mechanism comprises a rotary cam shaft, a locking vertical plate, a locking vertical plate seat, an upper locking slide way seat, a locking support, a lower locking slide way seat and a tension spring. The piston combination and separation mechanism can achieve combination and separation of the large piston and the small piston, the mass of the pistons is decomposed, inertial impact and vibration during piston movement are reduced, and power consumption of the compression mechanism in the grass material compression process is effectively reduced.

The invention discloses a transmission assembly assembling method. The method comprises a material conveying link, a material taking link, an assembling link and a pressing link. According to the method, different target parts are conveyed to respective preset positions through a ratchet ring conveying mechanism, a crankshaft conveying mechanism, a gasket conveying mechanism, a shaft sleeve conveying mechanism and a bearing conveying mechanism; material taking and assembling are conducted through the ratchet wheel ring material taking and assembling mechanism, the crankshaft material taking and assembling mechanism, the gasket material taking and assembling mechanism, the pawl material taking and assembling mechanism, the shaft sleeve material taking and assembling mechanism and the bearing material taking and assembling mechanism, and a target workpiece is pressed through the pressing mechanism. Angles of the ratchet ring part and the crankshaft part are recognized and adjusted, assembling is convenient, in this way, automatic assembling of the target workpiece can be achieved, and the assembling efficiency can be improved easily.

A transmission assembly for converting between a ceiling mounted to a jackshaft configuration includes an output coupler for operably coupling a drive tube rotatable to open and close a sectional door, a pinion assembly operably coupled to the output coupler via a flexible coupling member, a releasable coupling assembly, a handle, and a cam operated engagement assembly. The releasable coupling assembly is operably coupled to a motor output shaft of a GDO motor. The releasable coupling assembly has an engaged state in which rotation of the motor output shaft is transferred to the pinion assembly and a disengaged state in which the rotation of the motor is not transferred to the pinion assembly. The cam operated engagement assembly is operably coupled to the handle and the releasable coupling assembly to transition the releasable coupling assembly between the engaged state and the disengaged state based on a position of the handle.

The utility model discloses a stainless steel discharge tank circumferential weld welding device which comprises a support, a deslagging mechanism is arranged on one side of the support, the deslagging mechanism comprises a fixing plate, one side of the fixing plate is fixedly connected with the support, the top of the fixing plate is fixedly connected with an electric telescopic rod, and the top of the electric telescopic rod is fixedly connected with a motor. The top of the electric telescopic rod is fixedly connected with a rectangular plate, and the top of the rectangular plate is fixedly connected with an electric sliding table. By arranging the slag removal mechanism, a double-shaft motor drives a grinding piece to rotate and conduct grinding work, meanwhile, the double-shaft motor drives a crankshaft to rotate, the crankshaft makes contact with a triangular plate in the rotating process and drives the triangular plate to move, the triangular plate drives a rectangular rod to move, and after the crankshaft is away from the triangular plate, a fixed disc is driven to move through thrust of a spring; the fixing disc drives the rectangular rod to move, the rectangular rod drives the knocking block to move, the welding position is knocked, welding slag is knocked off, and the slag removal effect is good.

A load transmission mechanism unit for a training machine includes a main driving shaft portion having an end portion connected to an input portion to which a user inputs a force, and configured to rotate together with the input portion; an intermediate shaft portion configured to rotate in conjunction with the rotation of the main driving shaft portion; a first rotation transmission unit suspended between the main driving shaft portion and the intermediate shaft portion, and configured to transmit the rotations of the main driving shaft portion and the intermediate shaft portion to each other; and a second rotation transmission unit provided between the intermediate shaft portion and a crank shaft portion which is orthogonal to the intermediate shaft portion, and configured to transmit the rotation of the intermediate shaft portion and a rotation of the crank shaft portion to each other.

A drive unit of an electrically assisted bicycle includes a housing, a crank shaft extending through a first wall and a second wall of the housing and rotatably supported by the housing, a motor inside the housing, a cover inside and attached to the housing to cover at least a portion of the motor, and a speed reducing mechanism between the cover and the second wall inside the housing. The cover includes a bulging portion bulging outward from the motor when viewed from an axial direction of the crank shaft. The speed reducing mechanism includes a first speed reducer rotatably supported by the cover and the second wall so that a rotational axis center of the first speed reducer is located at the bulging portion when viewed from the axial direction of the crank shaft.

The invention discloses an efficient continuous variable geometric compression ratio device suitable for engines of various structure types, and relates to the technical field of engines. Comprising a machine body, a piston, a connecting rod, a crankshaft and an eccentric shaft sleeve, a large-head hole of the connecting rod is rotatably connected with an outer circle of the eccentric shaft sleeve, a crankshaft journal of the crankshaft is rotatably connected with an inner hole of the eccentric shaft sleeve, and at least one end of the eccentric shaft sleeve is fixedly connected with a driven gear. The driven gear is in transmission connection with a driving gear, and a regulation and control unit is arranged between the driving gear and the crankshaft. When the compression ratio of the engine needs to be adjusted, the control unit controls the driving gear to rotate to a target phase relative to the crankshaft; when the compression ratio of the engine does not need to be adjusted, the adjusting and controlling unit controls the driving gear and the crankshaft to rotate synchronously. The problems that an existing VCR device is narrow in application range and the like are solved, the mechanical loss in the operation process of an engine is greatly reduced, and the efficiency of the engine is greatly improved.

A glider seating unit with a selectively powered gliding motion is provided. The glider seating unit includes a base frame and a glide assembly movably connected to the base frame. The glide assembly is configured to glide in a forward direction and in a backward direction relative to the base frame. A glider drive mechanism is connected to the base frame and includes a motor, a drive shaft connected to the motor, a crankshaft releasably connected to the drive shaft at a joint, and a linkage connected between the crankshaft and the glide assembly. Operation of the motor in a first rotational direction connects the drive shaft to the crankshaft to rotate the crankshaft to thereby induce reciprocating forward and backward gliding motion of the glide assembly relative to the base frame. Operation of the motor of the glider drive mechanism in an opposite, second rotational direction disconnects the drive shaft from the crankshaft to permit the glide assembly to glide freely forward and backward relative to the base.

To provide an eccentric oscillation type gear device that can prevent a limiting member from being sandwiched between a crank bearing and an eccentric part of a crankshaft.SOLUTION: An eccentric oscillation type gear device comprises: a crankshaft 14 comprising an eccentric part 12A; an eccentric bearing 50A arranged on the eccentric part 12A; a limiting member 52A for limiting axial movement of the eccentric bearing 50A, and provided so as to be relatively rotatable with respect to the crankshaft 14; a crank bearing 54A arranged on the side opposite to the eccentric part 12A in an axial direction across the limiting member 52A, and supporting the crankshaft 14; and a positioning part 56A provided separately from the limiting member 52A, and positioning the crank bearing 54A in the axial direction with respect to the crankshaft 14 by being in contact with the crank bearing 54A from the side of the eccentric part 12A.SELECTED DRAWING: Figure 3

Examples of the subject disclosure describe a snow vehicle and a powertrain for propelling the snow vehicle over terrain. The powertrain, in certain examples, includes a propulsion unit configured to rotate a drive gear which is disposed on a first side of the propulsion unit. The powertrain also includes a first jackshaft having a first end which is rotationally coupled with the drive gear via a flexible loop, and a second end which is disposed on an opposite side of the propulsion unit and is coupled with a primary clutch. The powertrain also includes a second jackshaft having a first end coupled with a chain gear, and a second end is coupled with a secondary clutch.

The invention discloses an eccentric crank stroke coordinate and balance adjustable reciprocating mechanism which comprises a base, a driving mechanism, a transmission mechanism and a mounting mechanism, the transmission mechanism comprises an eccentric wheel and a crankshaft, a connecting shaft is arranged at the eccentric position of the crankshaft, and the crankshaft is movably mounted in the eccentric wheel and can rotate; an adjusting assembly is arranged in the eccentric wheel and is in butt joint with the crankshaft. The connecting shaft is connected with a connecting rod, the connecting rod is connected with a sliding plate, and the sliding plate is slidably erected on the base; the mounting mechanism is mounted on the sliding plate, and the sliding plate is connected with a position adjusting mechanism and a balance adjusting mechanism. Therefore, the coordinate of the tool can be conveniently adjusted, and the gravity of the part is overcome to achieve better balance. The stroke of the reciprocating mechanism can be adjusted, the coordinate position of the stroke can be adjusted, high-precision grinding machining of different strokes and different positions is achieved, parts with different blade lengths are machined, the stable balanced reciprocating stroke is provided, vibration is reduced, and machining precision and lines are guaranteed.

This invention provides a control device for a manually operated vehicle that allows for appropriate gear shifting via a derailleur. The control device for the manually operated vehicle includes a control unit. The vehicle includes: a crankshaft; at least one first rotating body; a wheel; at least one second rotating body; a transmission body; a derailleur; and a motor configured to drive the transmission body. The control unit is configured to control the motor and the derailleur, and is configured to drive the transmission body via the motor in at least one of the following situations: after the derailleur shifting operation begins while the crankshaft is rotating and before a predetermined first period has elapsed; and after the derailleur shifting operation begins while the crankshaft is rotating and before a predetermined first period has elapsed, the control unit presumes that the crankshaft's rotation has stopped.

This invention discloses an automatic opening and closing air vent and cooling cabinet based on zoned temperature within the cabinet, belonging to the field of electrical equipment heat dissipation technology. The air vent includes components such as a base, crankshaft, movable air baffle, and electromagnet, achieving precise 90° opening and closing via electromagnet drive. The movable air baffle can be either perforated or non-perforated, depending on requirements. The cooling cabinet includes the aforementioned air vent, cooling fan, air duct, cabinet body, and temperature controller. The cabinet body is divided into multiple independent chambers, each equipped with an air vent and temperature probe. The temperature controller automatically controls the opening and closing of the air vent based on the chamber temperature. This invention enables precise and concentrated delivery of cold air to high-temperature areas, solving the problems of inaccurate heat dissipation, high cost, and low efficiency of existing cooling cabinets. It improves cooling efficiency, reduces cooling power requirements, and features a simple, reliable, and easy-to-maintain system, making it suitable for local deployment scenarios of electrical equipment with high heat dissipation requirements, such as AI hardware.

The utility model belongs to the technical field of speed reducers, and discloses a speed reducer with a compact structure, which comprises a lower shell, a lower convex shell is integrally arranged at the central position of the lower shell, an upper convex shell is mounted on the lower convex shell, and an upper cover body is integrally connected to the upper convex shell; the interiors of the lower convex shell and the upper convex shell are hollow, the lower convex shell is symmetrically provided with two arc-shaped through grooves, and the upper convex shell is provided with an arc-shaped blind groove; an input shaft and two planet shafts are installed between the lower shell and the upper cover body, a shaft body of the input shaft is integrally connected with a first crank shaft, and shaft bodies of the planet shafts are integrally connected with a second crank shaft; a balance wheel set is fixedly installed on a shaft body of the planet shaft, the two second crankshafts are matched with an output disc in a meshed mode, and therefore larger torque can be borne, larger impact force can be borne, and the use strength is guaranteed; according to the utility model, the output disc is not easy to be stressed in the horizontal and vertical directions, so that the whole structure is compact.

The utility model discloses an adapter sleeve hydraulic locking structure for a self-aligning roller bearing, which comprises an adapter sleeve, a hydraulic nut structure, the self-aligning roller bearing, a bearing fixing flange, a bearing retainer ring and a crankshaft, a through hole is arranged at the center of the bearing fixing flange, and the self-aligning roller bearing is positioned between the inner side wall of the bearing fixing flange and the outer side wall of the crankshaft. The adapter sleeve is located between the outer side wall of the crankshaft and the inner side wall of the self-aligning roller bearing, a thread structure is arranged on the outer side wall of one end of the adapter sleeve, and the hydraulic nut structure comprises a nut and a piston; at least two grooves are formed in the front end face of the nut, the pistons are connected into the grooves in a sliding mode, hydraulic oil cavities are formed between the bottom faces of the pistons and the bottom faces of the grooves, oil filling ports are formed in the bottom faces of the grooves, the nut is connected to one end of the adapter sleeve in a threaded mode, and the hydraulic nut structure is located on one side of the self-aligning roller bearing. And the bearing retainer ring is sleeved on the crankshaft and is connected with the end surface of the other side of the self-aligning roller bearing.

The utility model discloses a variable load road roller, it includes frame and sets up the walking mechanism and load adjusting mechanism in the lower part of frame, wherein walking mechanism includes the front drive axle of hinged connection in the bottom of frame front side and the rear drive axle of hinged connection in the bottom of frame rear side, and load adjusting mechanism includes the multiple groups of loading wheel of setting between front drive wheel and rear drive wheel, and loading wheel hinged connection is established on the support axle, and the end of this support axle is hinged fixed on the rocker and crank, wherein the other end of crank is hinged connection with the crank axle of setting on one side of support axle, and the crank axle is hinged connection with the hinged seat of installing on the frame, and the other end of rocker is hinged connection with the loading cylinder telescopic end of setting on the other side of support axle, and loading cylinder is hinged installed on the frame through hinged seat, and the loading wheel can be through the control loading cylinder action to realize to the pressure intensity of carrying out to the road surface through the road surface rolling pressure belt, and then realizes the quick adjustment of road roller to the ground pressure intensity.

Embodiments of the present application provide a jacking device and an autonomous movement robot. The jacking device provided in the embodiments of the present application uses a crankshaft motor and a connecting rod mechanism, wherein an output end of the crankshaft motor is hingedly connected to a first rod, and the other end of the first rod is then hingedly connected to a first end of a second rod and a first end of a third rod of the connecting rod mechanism; when the output end of the crankshaft motor outputs power, the first rod drives the second rod and the third rod to act, changing the included angle between the second rod and the third rod, thereby pushing a scissor assembly and a first jacking plate to ascend and descend. Since the crankshaft motor is used in the solution of the embodiments of the present application, the configuration of a related transmission mechanism is reduced and the structure is simple; by means of the first rods, the second rods, and the third rods, the crankshaft motor drives scissor arms and the first jacking plate to act, the entire transmission chain is short, the transmission efficiency thereof is high, and the lifting / lowering speed of the jacking device is significantly improved; in addition, because the transmission chain is short and the number of parts is reduced, the maintenance cost of the jacking device provided by the present solution is low.

The invention discloses a linear driver which comprises a semi-circular-arc-shaped rack and a driving sliding base limited on the semi-circular-arc-shaped rack in a sliding mode, and a plurality of layers of driving swing plates meshed with the semi-circular-arc-shaped rack are arranged on the driving sliding base. A plurality of layers of second arc teeth are arranged on the side face of the semi-arc-shaped rack, and first arc teeth meshed with the corresponding second arc teeth are arranged on the side face of the driving swing plate. A crankshaft is rotationally connected to the driving sliding seat, and an eccentric disc is eccentrically arranged on the crankshaft; the driving swing plate is in transmission connection with the eccentric disc through the needle bearing, and the crankshaft is in transmission connection with the transmission mechanism. The eccentric disc is driven by the transmission mechanism to rotate, so that the first arc teeth of the driving swing plate are driven to be engaged with the tooth surfaces of the second arc teeth on the semi-circular-arc-shaped rack for displacement. According to the linear driver and the linear driving method thereof, driving is achieved on the basis of circumferential swing of an eccentric structure, and the linear driver is matched with a robot joint in the start-stop stage or during load sudden change.

The utility model discloses a film pressing device for wrapping film production, which comprises a bottom plate, one side of the bottom plate is provided with a tension adjusting mechanism, the tension adjusting mechanism comprises a support, the left side of the support is provided with a motor, the output end of the motor is fixedly connected with a crankshaft, the surface of the crankshaft is movably connected with an adjusting rod, and the adjusting rod is fixedly connected with the bottom plate. And one side of the adjusting rod is movably connected with a movable rod. According to the film pressing device for winding film production, a tension degree adjusting mechanism is arranged, a pressure value is set through an external PLC, when it is detected that the pressure value is different from the set value, a crankshaft is driven by a motor to rotate, the crankshaft drives an adjusting rod to move, the adjusting rod drives a movable rod to move, the movable rod drives an adjusting base to move, and the adjusting base drives a toothed plate to move; the toothed plate drives the gear to rotate, the gear drives the rotating shaft to rotate, the rotating shaft drives the adjusting frame to rotate, the adjusting frame drives the rectangular rod to rotate, and the rectangular rod drives the extrusion roller to rotate, so that the working tension degree is conveniently adjusted.

The present invention provides a battery sealing device, which comprises: a bracket; a lower die assembly fixedly arranged on the bracket and including a pier-sealing lower die for carrying a workpiece; an upper die assembly including a crankshaft, a crank connecting rod, a connecting shaft, a first guide post and a pier-sealing upper die, wherein one end of the crank connecting rod is rotatably sleeved on the crankshaft, the other end of the crank connecting rod is rotatably connected to the first guide post through the connecting shaft, and the pier-sealing upper die is arranged at the other end of the first guide post and approaches or moves away from the pier-sealing lower die along with the reciprocating movement of the first guide post. The battery sealing device described in the present invention can preferably improve the efficiency of battery pier-sealing.

A bicycle mid-drive motor assembly structure is applicable to a vehicle frame of a bicycle. The vehicle frame includes an axle through-tube in which a crank axle is mounted for driving a front chainwheel. The mid-drive motor assembly structure includes a motor and a clutch set. The clutch set includes a crank axle sleeve, a support sleeve, a clutch wheel, a cover cap, and a transmission wheel. With the crank axle sleeve and the support sleeve respectively sleeved on and mounted to the crank axle and the axle through-tube, the clutch wheel, the cover cap, and the transmission wheel can be effectively aligned and positioned, effectively increasing the axial locking force and the radial supporting force, making power transmission stable and reliable, also preventing loosening resulting from vibration during operation and preventing wear resulting from poor meshing, thereby effectively extending the service life.

The utility model discloses a modularized crankshaft and an RV speed reducer, and belongs to the field of speed reducers. The shape memory alloy assembly is sleeved outside the central shaft; the first shaft sleeve assembly and the second shaft sleeve assembly are detachably connected outside the shape memory alloy assembly in a sleeving mode, and the first shaft sleeve assembly abuts against the second shaft sleeve assembly. The first shaft sleeve assembly and the second shaft sleeve assembly are the same in structure and each comprise a first shaft sleeve body detachably connected to the outside of the shape memory alloy assembly in a sleeving mode. And the second shaft sleeve body is sleeved outside the first shaft sleeve body. A first flat potential is arranged outside the first shaft sleeve body, a second flat potential is arranged in the second shaft sleeve body, and the first flat potential abuts against the second flat potential. The utility model has the technical effects that the modular performance is good, and the connection performance is good.

A human-powered vehicle control device includes an electronic controller configured to control a motor to drive a transmission body with the motor and operate the transmission body with a derailleur to perform a shifting action that changes the transmission ratio in a case where a crank axle is stopped. The electronic controller includes in a control state including a first control state in which the shifting action is performed and a second control state in which a driving force of the motor during the shifting action is reduced compared to the first control state. The electronic controller shifts the control state to the second control state in a case where a rider is riding the human-powered vehicle and at least one of a posture of a body of the human-powered vehicle and a posture of the rider is in a predetermined state.

A pedal propulsion vehicle drivetrain (1), comprising a housing (2), comprising:-a crankshaft (3); an internal multi-speed gear (4) having an input shaft (4a) and an output shaft (4b) which are coaxial; an electric motor (5) having an output shaft (5a), in which the crankshaft, the input and output shafts of the internal multi-speed gear and the output shaft of the electric motor are arranged in parallel, in which both the crankshaft and the electric motor are arranged to drive the input shaft of the internal multi-speed gear in the same direction of rotation.

The utility model discloses a novel RV speed reducer which comprises an input shaft, a planetary speed reduction assembly, a cycloid speed reduction assembly and an output disc, the input shaft is connected with the planetary speed reduction assembly, the planetary speed reduction assembly is connected with the cycloid speed reduction assembly, the planetary speed reduction assembly and the cycloid speed reduction assembly are respectively connected with the output disc, and an inner gear ring is arranged on the output disc. A crankshaft and a planet wheel are arranged on the planetary speed reduction assembly, the crankshaft is connected with the planet wheel, a sun wheel is arranged on the input shaft, the sun wheel is meshed with the planet wheel, the crankshaft is connected with the cycloid speed reduction assembly, a fixing component is arranged on the input shaft, the fixing component is connected with the planet wheel, and the planet wheel is meshed with the inner gear ring. The sun gear and the planet gear are kept meshed through the fixing component, the planet gear is driven to move to be separated from the crankshaft, the planet gear is meshed with the inner gear ring of the output disc, primary transmission and secondary transmission of the RV reducer are switched back and forth, energy loss and heat generation are reduced, and equipment is more energy-saving and efficient.

The utility model discloses a diaphragm pump structure capable of adjusting dynamic balance, which comprises a crankshaft comprising a first shaft section and a second shaft section, the crankshaft is provided with a shaft hole along the axial direction of the crankshaft, the center line of the shaft hole is parallel to and does not coincide with the center line of the first shaft section, and the center line of the shaft hole is coincide with the center line of the second shaft section; the motor shaft penetrates through the crankshaft through the shaft hole, and the motor shaft is fixedly connected with the crankshaft; the first shaft section is sleeved with the crank support, and the first shaft section is connected with the crank support through a bearing; the diaphragm assembly is arranged on the crank bracket; the balance sleeve is arranged on the second shaft section in a sleeving manner; and the balancing weight is detachably locked on the balancing sleeve. According to the diaphragm pump structure capable of adjusting the dynamic balance, when the external load of the diaphragm pump changes, different configurations can be achieved by replacing the balancing weights with different loads, manual adjustment of the dynamic balance is completed, inertia force of rotating components is offset, the diaphragm pump achieves the optimal dynamic balance, and the vibration amplitude is reduced.

The utility model relates to the technical field of meat residue treatment, and particularly discloses a meat residue crushing and screening device which comprises a supporting mechanism used for supporting the whole device, a crank-link mechanism is arranged on the supporting mechanism and comprises two crankshafts rotationally installed on a supporting plate, and a plurality of groups of first cranks and second cranks are arranged on the crankshafts. A crankshaft sleeve is installed on the first crank fixing shaft, a plurality of shaft sleeve pins are fixedly installed on the crankshaft sleeve, a connecting rod is arranged on the crankshaft sleeve, a connecting rod shaft is rotatably installed at the other end of the connecting rod, fixing plates are fixedly installed at the two ends of the connecting rod shaft, screening assemblies are installed on the fixing plates, and the second crank and the first crank are the same in structure. According to the utility model, the screening assembly is arranged, so that the crank connecting rod mechanism moves up and down to drive the screening assembly to shake up and down, meat residues falling into the screening assembly are screened, and the screening quality is improved.