32results about How to "Preload achieved" patented technology

The invention discloses an integral paper frame structure comprising a paper roll supporting shaft for sleeving a paper roll, wherein a paper roll pre-tightening mechanism arranged on one end of the paper roll supporting shaft comprises a fastening part fixedly connected with the end part of the paper roll supporting shaft, and a pre-tightening part pressed on one side of the paper roll, an elastic part is arranged between the fastening part and the pre-tightening part, and the pre-tightening part is movably connected with the paper roll supporting shaft in axial direction. By utilizing a unilateral supporting structure, large sized paper roll can be installed or demounted conveniently, by adopting the paper roll pre-tightening mechanism, the paper roll can be pre-tightened, and the paper roll can be quickly installed or dismounted by adopting a snap-in type connection between the paper roll pre-tightening mechanism and the paper roll supporting shaft, wherein the snap-in type connection is capable of being quickly installed or dismounted. A locating plate is mounted on the other end of the paper roll supporting shaft and located by a connecting block, the connecting block is located by adopting a simple slotted hole, so that printing paper with various widths and the same dimension can be located. The invention further discloses a vertical type printer and a horizontal type printer comprising the integral paper frame structure.

The invention relates to an anti-drifting device and equipment for equipment in a microgravity environment. The anti-drifting device includes an anti-drifting component and a guiding and positioning component. The anti-drifting component includes a locking pin and an anti-drifting guide sleeve. Tight through hole, the locking pin can be axially moved and inserted in the locking through hole; the guide positioning assembly includes a guide sleeve and a guide pin, the guide sleeve is provided with a guide through hole, and the guide pin can move axially Inserted in the guide through hole; the height of the guide pin is greater than that of the locking pin. The anti-floating component and the guiding and positioning component of the present invention are used in a complete set to realize the functions of positioning, guiding and anti-floating. The axial direction of the pin shaft is translated. The guide pin guides the equipment to continue to cooperate with the anti-floating component (the height of the guide pin is greater than the height of the locking pin). At this time, the anti-floating guide sleeve on the equipment and the locking pin complete the precise positioning.

The invention relates to a bending vibration sandwich transducer type cylindrical double rotor ultrasonic motor which relates to the technical field of piezoelectric ultrasonic motors. The ultrasonic motor solves the problem in an existing ultrasonic motor that the mechanical output ability is restricted and a single stator only can realize single movement output. The bending vibration sandwich transducer type cylindrical double rotor ultrasonic motor of the invention comprises a stator component, an inside rotor component, an outside rotor component, a bearing block, a bearing and a bearing pre-tightening end cap, wherein continuous comb-shaped driving gears are manufactured on the inner surface of a cylinder, an inside rotor with a shaft and an inside rotor without the shaft are truncated cone-shaped, thin ends of the inside rotor with the shaft and the inside rotor without the shaft are respectively inserted on and under the cylinder, an outside rotor with the shaft and an outside rotor without the shaft are respectively installed on and under the stator component, wear resistance bush rings are respectively fixed on the side surfaces of the outside rotor with the shaft and theoutside rotor without the shaft, which are contacted with a stator rear end cap, and the inside rotor with the shaft is connected with the bearing block in a rotary mode through the bearing. The bending vibration sandwich transducer type cylindrical double rotor ultrasonic motor can be applied in the manufacture field of ultrasonic motors.

The invention provides a machine tool spindle system provided with a pretightening force adjusting device. The machine tool spindle system comprises a spindle, a first ball bearing and a second ball bearing which sheath the spindle at intervals, an inner spacer bush, a cooling jacket, a piston element and a pressure measuring element, wherein the inner spacer bush sheathes the spindle and is arranged between the first ball bearing and the second ball bearing, and the two ends of the inner spacer bush respectively prop against the inner ring of the first ball bearing and the inner ring of the second ball bearing; the cooling jacket surrounds the spindle and is in respectively fit with the outer ring of the first ball bearing and the outer ring of the second ball bearing; the piston element is arranged on the cooling jacket and used for pushing the outer ring of the first ball bearing to move axially; and the pressure measuring element is arranged on the cooling jacket and used for acquiring a load born by the outer ring of the second ball bearing. The machine tool spindle system provided by the invention has the advantages that other spindle parts and structures do not need to be changed and the machine tool spindle system can be applicable to any bearing configuration way.

The invention relates to a push rod pressing device, a positioning assembly and a positioning device. The push rod pressing device includes a workbench movable restraint seat and a restraint head. The restraint head is installed on the workbench movable restraint seat. The installation direction of the movable restraint seat of the table is arranged at an angle; the movable restraint seat of the workbench includes the main support of the restraint seat, the tightening handle and the movable stopper. The main support of the restraint seat is provided with an assembly through hole, and the movable stopper can The rotating one is embedded in the assembly through hole of the main support of the constraint seat, and the movable block is provided with radially arranged handle sliding grooves, and the tightening handle is installed in the handle sliding grooves and can slide along the handle sliding grooves. The workbench movable restraint seat and restraint head arranged at an angle are used to fix the restraint head at a suitable position on the workbench through the workbench movable restraint seat, and provide pre-tightening force to the load equipment, and then use the restraint head to generate friction with the load equipment And ensure that the constraints on the load equipment are fixed.

The invention discloses an active pre-fastening safety belt device, and belongs to the technical field of passenger injury protection in vehicle collision accidents. The safety belt device comprises a direct current motor, a transmission system, a coiler and a braid external part; the direct current motor is connected with the transmission system for responding a control signal of an accident pre-fastening device to work; an output shaft of the direct current motor is connected with a planetary gear train of the transmission system; the planetary gear train transmits power to the outer gear of an isolator by a middle idle gear; the isolator is designed into a ratchet structure; a safe coupling sleeve is mounted between the ratchet and a spindle of the coiler so as to transmit the power to the coiler; and one end of the frame of the coiler is provided with an emergency locking device which is sensitive to the placing angle of the safety belt and the pulling-out acceleration of a braid, thus realizing the emergency locking of the active safety belt. The pre-fastening of the safety belt can be finished before an accident occurs, and eliminates the wearing gap of the safety braid, so the restraining performance of the safety belt on a passenger is increased in the collision accident, and the collision injury of the passenger can be obviously reduced.