184results about How to "Rotation limit" patented technology

The invention relates to a turning and milling composite functional unit for a numerical control machine, in particular to a modularized B-axis turning and milling composite functional unit, which comprises a B-axis module and a turning and milling head module, wherein the B-axis module comprises a driving device, a three-fluted-disc indexing structure and a brake structure, the turning and milling head module comprises a motor driving device and a three-fluted-disc fixing device, the turning and milling head module id driven by a built-in motor, and is provided with a three-fluted-disc locking structure, during turning, three fluted discs are locked to ensure structure rigidity, during milling or drilling, the three fluted discs are loosened, and a main shaft rotates to drive a cutter to carry out processing. The B-axis module is driven by the built-in motor, during indexing processing, the three-fluted-disc locking structure is adopted to ensure the structure rigidity and the indexing accuracy; and during processing at any angle, the brake mechanism is adopted to ensure the processing rigidity. The B-axis module and the turning and milling head module are connected through screws, and according to processing requirements, different turning and milling heads are replaced so as to expand processing capability.

The invention discloses a bamboo-shaped buckling-restrained brace, comprising a core component, an external restrained component and reinforced connecting components, wherein the core component is formed by alternately arranging a plurality of circular energy dissipation sections and a plurality of circular elastic sections along a longitudinal coaxial line; each circular elastic section comprises a plurality of middle elastic sections and two end elastic sections; the cross sectional area of each circular energy dissipation section is smaller than that of the corresponding circular elastic section; the core component is positioned in the external restrained component; each reinforced connecting component is composed of a node section, a connecting section and a reinforcing barrel. The bamboo-shaped buckling-restrained brace disclosed by the invention has the advantages that all the circular energy dissipation sections are shorter, and only yield without buckling under the action of an axial force, so that mortar is unnecessarily added or additional parts are unnecessarily arranged for restraining the circular energy dissipation sections, the cross sectional area of each circular energy dissipation section is smaller than that of each circular elastic section, the yielding force is less, and the rigidity requirement on the external restrained component is lower, therefore the external restrained component can be a simple circular casing, and the effects of simple structure, convenience in processing and lighter dead-weight are achieved.

The invention provides an electric valve that can inhibit uneven sound produced during control over a fixed base point. A coil part (50) of the electric valve (1) is integrally equipped with a coil portion (51) and a claw portion (52), wherein the coil portion can be in threaded combination with a guide rail (25) in a rotary manner, and the claw portion protrudes outwards in a radial direction from one end (51a) of the coil portion (51). A protruding bar (67) fixedly arranged on a magnetic rotor (62) presses the claw portion (52) in a way that the protruding bar rotates along with the magnetic rotor (62) to enable the coil part (50) to rotate. The claw portion (52) comes into contact with a floor-limit limit surface (26a) arranged close to the lower end portion (25a) of the guide rail (25) to limit rotation of the coil part (50). Moreover, when the claw portion (52) comes into contact with the floor-limit limit surface (26a), a claw abut surface (67a), abutting against the claw portion (52), of the protruding bar (67) is formed to tilt relative to the floor-limit limit surface (26a) if the claw portion is viewed in the radial direction of the guide rail (25).

The invention discloses an anti-falling climbing-assisting device. The device comprises a shell, wherein a rotatable winding drum is arranged in the inner space of the shell, a steel rope is wound around the winding drum, the winding drum is driven by a driving motor to rotate so as to enable the steel rope to do lifting motion along with rotation of the winding drum, an inner wheel coaxially connected with the winding drum in a transmission mode is arranged on the winding drum, a rotatable ratchet pawl is installed on the side surface of the inner wheel in the circumferential direction of theinner wheel, a return tension spring is arranged between the inner wheel and the ratchet pawl, an outer wheel which is coaxial with the inner wheel and arranged outside the inner wheel in a sleevingmode is arranged on the shell, and ratchets cooperating with the ratchet pawl for braking are arranged on the inner side surface of the outer wheel, so that the ratchet pawl can extend outwards to abut against the ratchets for braking under the action of centrifugal force generated by rotation of the inner wheel when the rotating speed of the winding drum reaches a set value.

The invention provides a buckle-type nut component comprising a nut body and a tubular unit. A protruding wing-shaped unit is arranged on the side wall of the nut body, and the outer wall of the tubular unit is provided with a flange arranged in a circumference direction. A limit groove, extending axially from one end of the tubular unit and penetrating through a plain on the upper surface of the flange and the plain on the lower surface of the flange, is reserved in the tubular unit. One end of the limit groove is open, while the other end of the limit groove is sealed. The wing-shaped unit of the nut body enters the limit groove from an open end of the limit groove, and extends out of the limit groove, so that the nut body is limited in the tubular unit, and a gap is reserved between the upper end surface of the wing-shaped unit and the lower end surface of the flange. The buckle-type nut taken place by a projection welding nut has the advantages of convenience in buckle connection operation and high intensity of connection with the nut. The nut component can be reused, and thermal deformation of a connector caused by welding is simultaneously avoided.

The invention relates to a flange structure applicable to an infrared thermal imaging module, comprising a movement frame, a flange ring and clamping jaws. The movement frame is disposed at one side of the flange ring. The movement frame and the flange ring are connected by limiting guide pins, and the limiting guide pins can limit the angle of rotation of the flange ring relative to the movement frame. The flange ring is provided with strip-shaped hollow first slots, and the clamping jaws are arranged in the first slots. The middle of each clamping jaw is rotationally connected with the movement frame through a rotating shaft. One end of each clamping jaw can abut on a lens inside the flange ring, and the other end of each clamping jaw can abut on the edge of the corresponding first slot. Compared with the prior art, the flange structure of the invention is applicable to multiple different movement and lens combinations, has a wide range of application, is low in cost and high in speed of combination, and enhances the imaging effect of the movement and the lens.

The invention provides a bridge inspection vehicle leveling device and bridge inspection equipment. As a buffering device is arranged in the bridge inspection vehicle leveling device, the buffering device can apply an acting force to a portal frame when a truss overhauling platform is inclined, the portal frame drives the truss overhauling platform so that the truss overhauling platform can slowlyrecover to the horizontal state; therefore, when a running mechanism moves to a steep slope position, the truss overhauling platform is prevented from shaking to cause injuries of operation workers within the truss overhauling platform and on a lifting overhauling platform and affect equipment within the truss overhauling platform and on the lifting overhauling platform.

The invention relates to a redundant unlocking and sequential control release mechanism for small satellite launching, and belongs to the technical field of rocket launching. The device comprises a cabin door, a frame body, a hinge part, a push plate, a thrust spring, four sliding rails, a limiting device, a connecting rod, a pressing plate and an electromagnetic lock; the top of the frame is open; the cabin door is arranged at the top opening of the frame body; the hinge part is arranged at the joint of the cabin door and the frame body; the electromagnetic lock is arranged on the side wall of the frame body; the four sliding rails are arranged at the corners of the four side walls in the frame body in the axial direction. The thrust spring is arranged at the bottom end in the frame body;the push plate is horizontally arranged at the top end of the thrust spring; the pressing plate is arranged at the bottom end in the frame body; the connecting rod is vertically arranged at the top end of the pressing plate; the limiting device is arranged at the top of the connecting rod; the limiting device drives the pressing plate to act together through the connecting rod; The invention discloses an external cubic small satellite releasing device where the electromagnet serves as a driving power source and the redundant unlocking function is achieved, the reliability of the unlocking device is improved, and then the launching success rate of an external cubic small satellite is increased.

The invention provides a steel strand unwinding device, and relates to the technical field of steel strand unwinding equipment. The steel strand unwinding device comprises a fixed bracket, a rotatingmechanism, a tensioning mechanism and a locking mechanism. The rotating mechanism is used for driving a disc-shaped steel strand to rotate, so that the end part of the disc-shaped steel strand is unwound; by means of the transmission effect of the tensioning mechanism, the disc-shaped steel strand can be in a tensioned state all the time in the unwinding process, and therefore the situation that the steel strand rolls over on the surface of a roller, cable strands are loosened due to the influence of gravity, resulting in winding of the cable strands is avoided; the posture is adjusted to be switched between a first state and a second state through the locking mechanism; unwinding of the disc-shaped steel strand can be limited or opened; and the technical problems that in the prior art, when the steel strand is unwound, the steel strand rolls on the surface of the roller, the steel strand is prone to being damaged, and the unwinding efficiency and quality of the steel strand are affected are solved.

Provided is a drug packaging device with which it is possible to maintain, at a constant level, the tension applied to a package. This drug packaging device comprises: a package feeder unit that feedspackages; a package transfer unit that transfers packages fed out from the package feeder unit, a tension-imparting unit (11X) that imparts tension to the package, and a transfer control unit that controls at least the package feeder unit. The transfer control unit controls at least the package feeder unit in such a manner that packages are transferred intermittently by means of the package transfer unit, and while intermittent transfer of packages is being executed, the quantity of packages fed out by the package feeder unit is made smaller than the quantity of packages transferred by the package transfer unit, and while intermittent transfer of packages is stopped, executes a feed of the difference in quantity of the quantity of the packages fed out by the package feeder unit with respect to the quantity of packages transferred by the package transfer unit.

The invention provides an elevator speed limiter. A rope wheel and a car synchronously move through a steel wire rope; a ratchet wheel limits a self rotating angle through a limiting device. When the car stops at a certain floor, a linkage device is started, so that the ratchet wheel is in linkage with the rope wheel; at the moment, once a car sliding phenomenon occurs, the limiting device firstly limits the rotating range of the ratchet wheel; at the moment, as the ratchet wheel is in linkage with the rope wheel, the rotation of the rope wheel is also limited, and the rope wheel and the car synchronously move through the steel wire rope arranged on the rope wheel in a tensioning manner; after the rotation of the rope wheel is limited, the steel wire rope of the speed limiter lifts and pulls a safety clamp operating handle, a safety clamp brakes the elevator car, and the motion of the car is also limited, so that the effect of controlling car sliding is realized. According to the elevator speed limiter, a phenomenon in the prior art that the car cannot stop due to the simple control of braking of a traction machine (as the secondary braking of the traction machine is not tight) can be effectively avoided.

The invention discloses a self-excited vibration generation device for a soil rotary tillage blade. The self-excited vibration generation device comprises a rotating shaft, a bearing seat, a torsion beam and a stretching strip, wherein one end of the rotating shaft extends into the bearing seat, the torsion beam is fixedly mounted at one end, extending into the bearing seat, of the rotating shaft, one end of the stretching strip is mounted at one end of the torsion beam, and the other end of the stretching strip is mounted on the bearing seat; the rotating shaft can automatically rotate in the bearing seat. The invention provides a self-excited vibration generation method for the soil rotary tillage blade. According to the method, DOF (degree of freedom) of the blade rotating relative to a central axis of the rotating shaft is released, rigidity in the DOF direction is provided, and under the condition that the blade is stressed non-uniformly in a working process, self-excited vibration of the blade is realized. According to the invention, self-excited vibration of the blade in three DOF directions including rotation around the central axis of the rotating shaft, movement in the axial direction of the rotating shaft and rotation in a hinge pin direction can be produced in the working process, self-excited vibration frequency can be adjusted by adjusting the rigidity in the corresponding DOF direction so as to adapt to different soil, and tillage resistance is small. The invention belongs to the technical field of agricultural soil cultivation.

The invention discloses a base plate fixing device of a heater rod bending forming machine. The device comprises a base; pressing frames are fixedly mounted at four angles of the upper end surface ofthe base; pressing blocks are mounted in grooves at the tops of the inner sides of the pressing frames; thread rods are fixedly mounted at the tops of the pressing blocks; the thread rods penetrate through the tops of the pressing frames; a first baffle plate is fixedly mounted at one end of the base; two sides of the first baffle plate are fixed on the outer sides of the pressing frames; a secondbaffle plate is rotationally mounted on the other side of the base; mounting frames are fixedly mounted at four angles of the lower end of the base; support plates are fixedly mounted on the lower end surface of the base on the inner sides of the mounting frames; and slide plates capable of vertically sliding are slidingly mounted at the lower ends of the mounting frames. In the device, the pressing frames can achieve a pressing effect on machined base plates mounted on the base; and thread rods can be used for adjusting the heights of the pressing blocks to meet the base plates with different thicknesses and sizes, so that the problems of simpler fixed plates and capability of fixing the base plates with one thickness in the prior art are solved.

The invention discloses a bed board turnover device of a medical bed, and belongs to the technical field of medical instruments. The turnover device comprises a frame, supporting legs are fixedly connected to the four corners of the bottom of the frame. Two plate bodies are symmetrically and rotationally connected to the middle of the top of the frame in the length direction. A supporting plate isfixedly connected among the four supporting legs; pushing mechanisms are symmetrically and rotationally installed in the middle of the top of the supporting plate. The output ends of the two pushingmechanisms are rotationally connected with the two plate bodies correspondingly. Limiting mechanisms are arranged at the two ends of the two sides of the frame. The limiting mechanism comprises positioning blocks fixedly connected to the two ends of the plate body. A cylinder is arranged on the positioning block; a fixing plate is fixedly connected to the lateral side of the frame, and a clampingrod cooperated with the cylinder is in sliding connection onto the fixing plate. The bed board turnover device of the medical bed is simple in structure, reasonable in design, capable of turning overthe two sides of a patient, low in cost, convenient to operate, capable of saving time and labor, and high in practicability, and can help medical staff or family members of the patient overturn the patient.

The invention relates to the technical field of medical instruments, in particular to an adjustable osteotomy guider. The guider mainly comprises an osteotomy plate, an adjusting plate connected to the upper side of the osteotomy plate in a sliding mode in the front-back direction, a femur fixing nail for fixedly connecting the adjusting plate to the osteotomy face of the distal femur, and an adjusting assembly for connecting the osteotomy plate and the adjusting plate. The osteotomy plate is provided with a plurality of osteotomy grooves penetrating through the upper side and the lower side;the adjusting plate is provided with a long hole extending in the left-right direction; the adjusting assembly comprises an adjusting knob and an eccentric connecting piece; the lower end of the adjusting knob is fixedly connected with the upper end of the eccentric connecting piece; the adjusting knob and the eccentric connecting piece are eccentrically arranged; the adjusting knob penetrates through the upper side and the lower side of the osteotomy plate; the eccentric connecting piece is arranged in the long hole of the adjusting plate in a penetrating mode; and the eccentric connecting piece is matched with the adjusting knob to clamp the osteotomy plate and the adjusting plate together. The osteotomy guider has the effect of conveniently adjusting the osteotomy amount.

The invention discloses a clamping device for cutting a multilayer filter cloth. The clamping device comprises a fixed seat, two symmetrical cavities are formed in the fixed seat, and a first slidinghole is formed in the inner top wall of each first cavity; second cavities are formed in the left and right ends of the fixed seat correspondingly; a first bearing is fixedly inlaid on the inner sidewall, close to each first cavity, of the corresponding second cavity; and forward and reverse rotating motors are fixedly connected to the inner side walls, away from each other, of the two second cavities. According to the clamping device for cutting the multilayer filter cloth, by arranging the forward and reverse rotating motors and by cooperatively using of threaded rods, threaded pipes, powerful springs, electric pushing rods and a second fixing plate, the threaded rods can be effectively driven to rotate through rotation of the forward and reverse rotating motors, the threaded rods rotate to drive connecting rods to move, meanwhile, the electric pushing rods drive height adjusting of the second fixing plate, and thus the multilayer filter cloth is clamped; and the problem that an existing clamping device for cutting a multilayer filter cloth is inconvenient to use is solved.

The invention belongs to the technical field of conveyor trucks, in particular to a star-wheeled transporter for construction site. The star-wheeled transporter includes a handbrake, an L-shaped panel, a star-wheeled mechanism, a support shaft, and a gear disk. wherein the conveyor of the invention utilizes the rotation of the Y-shaped bracket when climbing the stairs, the first gear on the Y-shaped support revolves around the outer circular surface of the gear plate, the first gear can rotate the second gear counterclockwise through the telescopic rod under the action of the first one-way clutch ring, the second gear drives the limit rack to be inserted into the gap between two adjacent limit plates on the ring sleeve more deeply, the rotation of the planetary wheel, the rotation shaft and the ring sleeve is completely restrict, and the dangerous phenomenon that the planetary wheel slips when climbing the stairs due to the planetary wheel causes the carriage to roll is avoided. In addition, the strip-type telescopic plate jacket, the first strip-type telescopic inner plate and the second strip-type telescopic inner plate are designed so as to disengage the second wheel from the engagement relationship with the limiting rack, thereby removing the rotation restriction on the planetary wheel.

The invention discloses a lifting type multi-layer clamp storage rack. The lifting type multi-layer clamp storage rack comprises a bottom plate, a top plate, a screw and multiple swivel sleeves which are arranged on the screw in a penetrating and sleeving manner and are in threaded connection with the screw. Each partition plate and the corresponding swivel sleeve are rotationally connected through the cooperation manner of an annular tenon and an annular groove. A clamp groove is formed in the outer circumferential face of the annular tenon of each swivel sleeve. Guide grooves are formed in each partition plate symmetrically about the axis of the screw. A clamp shaft is connected in each guide groove in a sliding manner, and a limiting block is arranged on the upper surface of each clamp shaft. A limiting hole is formed in the upper surface of each partition plate. A limiting rod is connected in each limiting hole in a sliding manner. The lower end of each limiting rod can stretch out of the corresponding limiting hole and can stop the limiting block on the corresponding clamp shaft, and therefore each clamp shaft can keep the state of being separating from the corresponding clamp groove. A thrust spring is arranged in the rear end of each guide groove, and each clamp shaft can keep the state of being clamped in the corresponding clamp groove. A pull mechanism is connected to the rear end of each clamp shaft and can pull the clamp shaft to slide. According to the lifting type multi-layer clamp storage rack, the partition plates can ascend and descend correspondingly and do not influence one another, and the distance between the partition plates can be adjusted according to the clamp height.