40results about How to "Change preload" patented technology

The invention discloses a transmission shaft vibration absorber, and relates to the field of automobiles. The transmission shaft vibration absorber is designed to enable the matching frequency of the vibration absorber to be adjusted conveniently. The transmission shaft vibration absorber comprises an annular rubber block and a quality block arranged outside the annular rubber block, wherein a plurality of through holes are formed in the circumferential direction of the quality block, adjusting bolts are fastened in the through holes, springs are further arranged between the adjusting bolts and the rubber block, one end of each spring is connected with the annular rubber block in a butting mode, and the other end of the corresponding spring is connected with the corresponding adjusting bolt in a butting mode. The transmission shaft vibration absorber can be used in automobile manufacturing.

The invention discloses a belt-type under-actuated three-joint mechanical finger structure and an operation method thereof. The structure comprises three-joint finger mechanisms with an under-actuatedstructure. Three three-joint finger mechanisms are evenly distributed on an upper base to form a palm-shaped actuating device and every two of the three three-joint finger mechanisms make a 120-degree angle; a lower base is arranged below the upper base; a step motor is arranged in the lower base; the step motor is connected with one end of a worm via a coupling; the other end of the worm is connected with the upper base; a worm gear is arranged in each of the three-joint finger mechanisms and the worm matches with the worm gears to rotate; power is transmitted to the three-joint finger mechanisms via a synchronous pulley which rotates synchronously with the worm gears; and grabbing and releasing of an object to be grabbed is thereby realized. The structure is simple, the transmission ratio is higher, the transmitting torque is increased, the rotating precision is improved and the control is more convenient.

The invention relates to the technical field of hanging frames, in particular to an underground pipeline hanging frame system. The underground pipeline hanging frame system comprises a hanging seat and a pipeline clamp. A frame body is connected with the lower side of the hanging seat. The lower end of the frame body is connected with a rapid insertion device. The rapid insertion device comprisesa connection base, a plurality of wedge blocks, a locking sleeve and an unlocking sleeve. The wedge blocks are rotationally connected to the upper end of the connection base. The locking sleeve and the unlocking sleeve are sequentially and rotationally arranged on the outside of the outer circle face of the connection base in a sleeving manner from top to bottom and correspond to the wedge blocks.The pipeline clamp is inserted into the connection base from the lower end. The locking sleeve and the unlocking sleeve cooperatively rotate and drive the outer ends of the wedge blocks to rotate, sothat the inner ends of the wedge blocks rotate into or retreat out of the pipeline clamp, and then the pipeline clamp and the rapid insertion device are mutually locked or loosened. According to theunderground pipeline hanging frame system, by arranging the rapid insertion device, when the pipeline is assembled or disassembled, it is just needed to cooperatively rotate the locking sleeve and theunlocking sleeve, disassembling bolts is not needed on a construction site, rapid assembly and disassembly of the pipeline clamp can be achieved, and convenience and rapidness are achieved.

The invention relates to a coulomb damper, belonging to the technical field of damping vibration absorbers. The coulomb damper comprises a housing seat, wherein a pair of frustum mounting seats is mounted in the housing seat; damping pairs are mounted in tapered holes of the frustum mounting seats; center shafts penetrate through the centers of the damping pairs; the two frustum mounting seats are mounted in an inner hole of the housing seat with the large ends of the tapered holes opposite to each other; an adjustment interval is reserved in the inner hole; damping pressure springs are mounted between the two pairs of damping pairs; the housing seat consists of an upper housing, a lower housing and a ball seat; the upper housing and the lower housing are provided with inner ball concaves; a spherical hinge structure is formed by the upper housing, the lower housing and the ball seat; and a ball seat center penetrable hole is provided with adjustment threads for mounting the frusta mounting seats. The coulomb damper completely eliminates damping waves and has ideal following character; the phenomenon of dead lock is avoided; and the axial size of the coulomb damper is significantly reduced; the structure is very compact; and the operation is very convenient.

An interval constant-force device capable of realizing stepless adjustment comprises a rope used for transmitting tension, a spring barrel, a spring shaft, a spring and an adjusting mechanism; the center end of the spring is connected to the spring shaft; the outer end of the spring is connected to the inner wall of the spring barrel; a cam is fixedly connected to one side of the spring barrel; one end of the rope is fixedly connected to the cam and is connected with an external stress mechanism after bypassing the cambered surface of the cam; the tightening degree of the spring is increased when the rope pulls the cam and the spring barrel to rotate around the spring shaft, and meanwhile, the corresponding radius vector on the cam is increased, so that the tension transmitted by the ropeis kept constant; the adjusting mechanism comprises a motor, a motor driver and a worm gear and worm reducer; the output end of the motor is connected with the input end of the worm gear and worm reducer; and the output end of the worm gear and worm reducer is connected with the spring shaft through a connecting assembly. According to the device, stepless adjustment of the tension on the cervicalvertebra of a patient can be realized, and the tension most suitable for the neck of the patient can be found.

The invention discloses a novel composite proportional electromagnet comprising a shell, a magnetic isolating ring, an armature, a left cover plate, a left pressure regulating nut, a right cover plate and a right pressure adjusting nut, wherein the magnetic isolating ring is sheathed in the shell; the armature is located in the magnetic isolating ring; the left pressure regulating nut is connected to a right end of the armature; the left cover plate is fixed on a left end of the shell; the right pressure adjusting nut is connected to the right end of the armature; and the right cover plate is fixed on the right end of the shell. According to the novel composite proportional electromagnet disclosed by the invention, the traditional magnetic isolating ring structure is replaced by a thin-walled structure, thereby simplifying the system structure, reducing the processing procedures and improving the production efficiency; the end face of the armature is changed to improve the electromagnetic attraction and improve the output force characteristics; and the pre-tightening forces acting on the two ends of the armature can be conveniently adjusted through pressure regulating springs to realize the adjustability of the acting force of the proportional electromagnet at a certain voltage or current. The novel composite proportional electromagnet disclosed by the invention is simple in structure, convenient to use and excellent in performance, can realize bidirectional displacement output, and can be directly connected with a valve core of a slide valve so as to control the bidirectional position proportion of the valve core of the slide valve.

The invention discloses a revolution speed detection device, and relates to the machining apparatus; the revolution speed detection device mainly comprises a support, a rolling portion, a slide portion and a counting portion; the rolling portion comprises a mount seat, a slide block, a first roller and a second roller; the slide portion comprises a slide seat and a slide bar; the mount seat and the slide seat are connected on the support in a slide manner; the slide block is connected on the mount seat in a slide manner; the first roller is connected on the mount seat in a rotary manner; the second roller is connected with the slide block in a rotary manner; a first spring is arranged between the support and the mount seat; a second spring is arranged between the slide block and the mount seat; the slide bar is arranged above the first and second rollers; two ends of the slide bar are respectively provided with a first control switch and a second control switch; the slide bar impacts the first control switch and tightly attaches to the first roller; the slide bar impacts the second control switch and tightly attaches to the second roller; the slide bar can measure the linear speed of the first and second roller edges, and the measuring result is not affected by the first and second roller grinding.

The invention relates to a monolithic insulation test tool for the carbon ceramic linear resistor; the test tool comprises a cavity, a main body part with an opening at the upper end and an upper cover for closing the opening at the upper end, the main body part and the upper cover are matched to form a closed air chamber, and the cavity is provided with an inflation inlet communicated with the air chamber; the main body part comprises a conductive supporting part for upwards supporting the monolithic resistor; the test tool comprises a wiring part connected with the conductive supporting part; the test tool further comprises an upper wiring terminal fixedly arranged on the upper cover, the upper wiring terminal comprises a middle electric conductor and an insulator fixedly arranged outside the electric conductor, the electric conductor downwards penetrates into the air chamber, and the insulator is used for being connected with the upper cover in a sealed mode. The test tool further comprises an elastic conductive piece arranged below the conductor, and the elastic conductive piece comprises a spring which directly or indirectly elastically presses the single resistor sheet and is conductively communicated with the single resistor sheet.

The invention discloses a hydro-generator temperature control system used for hydroelectric power generation. The structure of the system comprises an adjusting rotation shaft, an acousto-optic alarm,a temperature controller, an LED display, a bellows casing, an amplitude difference spring sleeve and a keyboard. According to the invention, an indirect method is used to measure the temperature ofthe rotor of a generator; a shunt, a current transducer and a voltage transducer are arranged to measure the temperature of the rotor of the generator; the measured current and voltage values pass through the temperature controller, and the measured temperature is transmitted to a processor for analysis and calculation; the temperature of the generator is controlled; embedding temperature measuring resistors in the whole rotor is avoided; the hidden danger of the safe operation of the generator is effectively avoided; the system has the advantages of simple operation and high practicability; the temperature controller can carry out remote communication to realize real-time monitoring of the temperature control of the generator; and the service life of the generator is effectively improved.

The invention discloses a precast forming mold for concrete wallboards, and belongs to the technical field of concrete wallboard production equipment. The precast forming mold comprises a mold slot, wherein a partition plate is inserted into the mold slot; the breadth of the partition plate is matched with the inner section of the mold slot; jacking mechanisms are arranged on one side of the partition plate and close to one inner wall of the mold slot, and comprise mounting seats fixedly mounted on the partition plate; ejector rods are slidably mounted on the mounting seats; one ends of the ejector rods face the mold slot; cranks are hinged and mounted on the mounting seats and comprise operation sections, inflection points and hinged sections which are sequentially arranged; the end partsof the hinged sections are hinged with the mounting seats; the cranks are connected with the ejector rods through connecting rods; and one ends of the connecting rods are hinged to the inflection point positions of the cranks, and the other ends of the connecting rods are hinged to one ends, away from the mold slot, of the ejector rods. The precast forming mold for the concrete wallboards solvesthe technical problem that the wallboards with different lengths cannot be precast by one mold slot, and is widely applied to the precasting of the concrete wallboards.

The invention relates to a control valve assembly comprising a valve body which is prestressed in a direction by a control spring assembly. The spring preload of the control spring assembly (12, 62) can be adjusted by an adjusting device (5, 7) which is completely accommodated in the valve box (2) or a fitted housing part.

The invention discloses a walking auxiliary device, and belongs to the technical field of auxiliary tools. The walking auxiliary device comprises a walking frame, rollers are mounted at the bottom ofthe walking frame, each of the two sides of the walking frame is provided with a set of supporting rods, each set of supporting rods comprises two vertically-arranged supporting arms and a transversely-arranged connecting arm, the connecting arm is connected to the upper ends of the two supporting arms, the supporting arms are vertically and slidably installed on the walking frame, an anti-skid block is mounted at the end part of each supporting arm, each set of supporting rods is provided with a handrail rod, the two ends of the handrail rod are fixed between the two corresponding supportingarms, the handrail rod is provided with a guide rod extending vertically, a guide sleeve is arranged at a position, corresponding to the guide rod, of the walking frame, the guide rod is inserted intothe guide sleeve, and a reset spring is arranged between the guide rod and the guide sleeve. The walking auxiliary device solves the technical problems that existing walking vehicles are inconvenientto move, difficult to position and inconvenient to use, and is widely applied to walking auxiliary tools.

The invention discloses a cleaning and disinfection device for medical tools, and relates to the field of cleaning devices. The device is simple in structure and convenient to use, containers can be specially cleaned, and can be automatically classified according to the sizes of the containers; the distance between limiting rollers on the two sides at the inlet position is larger than the distancebetween the subsequent limiting rollers, so that feeding is convenient; a dividing baffle can be used for shielding; the side of a pushing plate, near to a rotating platform, adopts an arc structure,so that a certain centring function is realized during pushing, the device is more stable; a pushing baffle ring is in threaded connection with a horizontal push rod, so that the position of the pushing baffle ring on the horizontal push rod is adjusted, further, the beforehand tightened quantity of a pushing spring is changed, and the use is more convenient.

The invention discloses a knob switch used for researching human-computer adaptability and a measurement method of the knob switch. The knob switch comprises a knob rod, wherein a fixed sleeve is arranged outside the knob rod, a shell is arranged outside the fixed sleeve, a knob cover support is arranged at an upper part of the knob rod, a range dial is fixed by the fixed sleeve and the shell, a pre-tightening sleeve is arranged at a lower part of the knob rod, and an elastic part is arranged between the knob rod and the pre-tightening sleeve. By the knob switch, a knob cover can be conveniently replaced according to a demand, and the adjustment of the diameter size of a knob control part is achieved; by arranging the range dial, the range dial is arranged below the knob support, and a rotation angle range can be measured on the range dial by an initial positioning line on the knob support after the knob cover is rotated; and the angle positions of uniform angle holes of the knob rod and a ball on the shell can be changed by rotating the knob cover, so that the torsional deformation angles of an upper torsional arm and a lower torsional arm of a torsional spring are changed, and the adjustment of the torque of the knob switch is achieved.