39results about How to "Good action reliability" patented technology

Provided is a shifting apparatus of a dual clutch transmission, including: a plurality of drive gears mounted onto a first input shaft (13; 213) or a second input shaft (14; 214) of dual clutches (11, 12; 211, 212); a plurality of transmission gears meshing with the drive gears, respectively, and each mounted onto a first support shaft (15; 215) or a second support shaft (16; 216); a plurality of synchronizers (S1-S4) positioned between the transmission gears and each slidably mounted onto the first support shaft or the second support shaft; a plurality of shift forks (51-54; 251-254) connected to the synchronizers and each having a follower pin (51a-54a; 251a-254a); and a dual cam mechanism (60; 260) connected to the follower pins of the shift forks to move the shift forks by rotation so that the synchronizers slidably move to be engaged with the transmission gears along the first support shaft or the second support shaft.

The invention discloses an elevator speed governor, and belongs to the technical field of elevator safety protection devices. The elevator speed governor comprises a box body which is provided with a signal collector, a speed governor wheel which is provided with a lock catch, a centrifugal mechanism which is arranged on the speed governor wheel, a centrifugal hammer reset mechanism which is arranged on the speed governor wheel and connected with the centrifugal mechanism, and a traction rope with the upper end fixed to an upper end and lower end connecting counter weight of a top layer floor. The elevator speed governor is characterized by further comprising a traction rope pressing wheel, a safety tongs braking rope and a braking rope traction mechanism, the traction rope pressing wheel is located in a cavity of the box body and arranged in the middle of a traction rope pressing wheel shaft, the middle of the traction rope is wound on the speed governor wheel and the traction rope pressing wheel, the upper end of the safety tongs braking rope is tied and fixed to the braking rope traction mechanism, the lower end of the safety tongs braking rope is connected with a pair of safety tongs, the speed governor wheel shaft is sleeved with the braking rope traction mechanism, and the braking rope traction mechanism is matched with the signal collector and the lock catch. The situation that negative rotation happens to the speed governor wheel is avoided; the effect of reliably locking a guide rail through the safety tongs is improved; action is reliable, and safety is ensured; the structure is simple, manufacturing is convenient, and assembling is rapid.

The invention provides a circuit breaker auxiliary switch, which belongs to the technical field of low-voltage electrical appliance accessories. The auxiliary switch comprises a pair of mutually matched shells, a microswitch arranged in a shell cavity of the shells and a transmission part which is also arranged in the shell cavity of the shells. A first contact arm which is used for actuating a contact pin of the microswitch and a second contact arm which protrudes out of the shells and is used for actuating an operating mechanism of the circuit breaker are formed on the transmission part. The auxiliary switch is characterized in that a first working surface and a second working surface which are used for continuously touching the contact pin of the microswitch are formed on the first contact arm, wherein the first working surface is formed on the upper end face of the first contact arm, and the second working surface is formed on the top end face of the first contact arm. The auxiliary switch has the advantages that the auxiliary switch is favorable for protecting the life span of the microswitch, and can improve the action reliability and safety of the microswitch, so that the reliability of the auxiliary switch can be guaranteed; and the switch is concise in structure and easy to assemble.

The invention discloses a lifting overweight protection device for a hoister, and pertains to the technical field of protection facilities for the hoister. The hoister comprises a hoister body arranged on the ground. The lifting overweight protection device comprises a spring box, wherein the spring box has a spring accommodating cavity, and a connection mechanism is fixed on one end of the spring box on the outer wall; a draw bar, wherein one end of the draw bar is located in the spring accommodating cavity, a draw bar base plate is fixed on the end portion of the end, the upper portion of the draw bar base plate forms a signal contact, and the other end of the draw bar is fixed on the ground; a spring, wherein the spring is sleeved on the draw bar, on end of the spring is supported on the draw bar base plate, and the other end of the spring is supported on the cavity wall of the spring accommodating cavity; a cover plate, wherein the cover plate is matched with the spring box and fixed with the spring box, and a signal contact sliding groove is arranged at one end of the cover plate; and an overweight signal acquisition mechanism, wherein the overweight signal acquisition mechanism is arranged on the cover plate and matched with the signal contact. The protection device has advantages of convenient installation, convenient usage and convenient maintenance. According to the invention, set work efficiency of the hoister body can be enhanced, good action reliability and security are achieved, and long service life can be ensured.

The invention relates to portable paper bag production equipment, in particular to a fixed-length cutting-off mechanism for carrying hand straps of a portable paper bag. The cutting-off mechanism comprises a rack, a clamping head opening maintaining structure, a cutter, a cylinder arranged on the rack and carrying hand strap positioning holes formed in the rack. A clamping head and a drive rod are connected with the cylinder, the cutter comprises a cutting board, a blade, a cutter opening spring and a cutter folding rod, the cutting board is connected to the rack, and the blade is hinged to the cutting board. The drive rod is provided with a drive block matched with the cutter folding rod. The clamping head comprises a first clamping piece, a second clamping piece hinged to the first clamping piece and a clamping head folding spring. The clamping head opening maintaining structure comprises a first blocking-connecting part arranged at one end of the rack, a second blocking-connecting part arranged at the other end of the rack, an opening state locking block, an opening guiding face and an opening block, and the carrying hand strap positioning holes and the first blocking-connecting part are located at the same end of the rack. The problems that manual carrying hand strap cutting is low in production efficiency, the lengths of cut straps is poor in uniformity, and operation is laborious are solved.

[PROBLEMS] An inverter for electric motor drive, suitable for an electric motor for fans and pumps and for en electric motor for driving motor vehicles. [MEANS FOR SOLVING PROBLEMS] An inverter device (4) for electric motor drive is constituted of two inverters, or an inverter (1) and an inverter (2), two electromagnetic contactors (43, 44), and one alternate operation control circuit (45). Usually, the inverter (1), the electromagnetic contactor (43) and the inverter (2), and the electromagnetic contactor (44) are alternately operated according to a command from the alternate operation control circuit (45) every time when a start switch (45a) and a stop switch (45b) are depressed, or alternatively, their operations are automatically alternated every 24 hours. As a result, their operation time periods are almost equal to each other, increasing operation reliability of the entire inverter device (5) and enabling power supply to an electric motor (3) to be continued even if either one fails.

The invention relates to a circuit used for energy storage type direct current attracting and direct current keeping of an alternating current contactor. The circuit is formed as follows: a first capacitor is connected with the positive pole of a first diode and the negative pole of a third diode, the negative pole of the first diode is connected with the negative pole of a second diode, the positive pole of the second diode is connected with the negative pole of a fourth diode, and the positive pole of the fourth diode is connected with the positive pole of the third diode; the positive poleof a second capacitor is connected with the negative pole of the first diode, the negative pole of the second diode, and one end of a relay; the other end of the relay is connected with a contactor and the negative pole of a fifth diode, and at the same time the contactor is connected with the positive pole of the third diode, the positive pole of the fourth diode, the negative pole of the secondcapacitor, and one end of a resistance; and the other end of the resistance is connected with the positive pole of the fifth diode. The circuit has a simple structure, the regulation is convenience, no auxiliary contact is needed, the voltage for attracting and keeping is stable, the circuit is suitable for various alternating current contactors, and the reliability of the action of the built-in alternating current contactor of a soft starter can be efficiently improved.

The invention relates to a short-circuit protection device for a switching device, belonging to the technical field of power distribution. The short-circuit protection device comprises a protection device body which is internally provided with a signal sampling input module. The short-circuit protection device is characterized in that an output end of the signal sampling input module is connectedinto an input end of a release driving module through a micro-processing module; an input end of the signal sampling input module is connected with an output end of a current signal amplifying device; the output end of the current signal amplifying device is respectively connected into input ends of a data conversion device and a comparison unit; output ends of the data conversion device and the comparison unit are connected into an input end of a microprocessor; and an output end of the microprocessor is connected with the input end of the release driving module. Therefore, the short-circuitprotection device has the advantages of compact overall design, concise signal transmission mode among the devices, good action reliability, strong anti-interference ability, high reliability, and being capable of accurately judging and handling signals at the first time.

A control and protection circuit of a control and protection switching device pertains to the technical field of electric industry. The invention includes a signal sampling circuit, a short-circuit detection circuit, a microprocessor circuit, a magnetic flux converter control circuit and a power converting circuit; the signal sampling circuit sends a current signal to the microprocessor circuit after the amplification and the potential uplifting, the short-circuit detection circuit sends a large range signal in the signal sampling circuit to the microprocessor circuit after the processing, themicroprocessor circuit judges whether the short-circuit fault is existed or not, a corresponding control signal is given out and sent to the magnetic flux converter control circuit, the magnetic fluxconverter control circuit converts the low-level signal which is emitted by the microprocessor circuit to a high-level signal by photoelectric isolation, a magnetic flux converter is driven, the power conversion circuit converts the alternating current high voltage to the direct current low voltage, so as to provide the power for the circuits. The circuit transfer method is simple, the structureis simple, the reliability of the actions is good, the anti-interference capacity is strong, and the invention has the advantages of small size and high reliability when the invention is used for thecontrol and protection switching device.

The invention discloses a magnetic-sensing button type steam switch of an electric kettle, which comprises a body and a button; wherein, the body is provided with a cylinder, a cavity of which is internally provided with a hard support that is provided with a hard magnetic, a spring is sheathed outside the cylinder, the bottom of the body is fixed with soft magnetic and the hard magnetic matched with the soft magnetism, and the soft magnetic is also corresponding to a steam hole; the button is internally provided with a mandril and externally provided with a contact, the button is matched withthe outside surface of the cylinder in a sliding way, the lower end of the mandril is contacted with the upper surface of the hard magnetic, and the two ends at the bottom of the button are in interference tight fit with the two ends of the hard support and can fix the hard magnetism; the body is fixed with a first terminal, a second terminal is arranged above the first terminal, a ring is arranged between the first terminal and the second terminal, the first terminal, the ring and the second terminal are sequentially connected with each other by a screw rod, the second terminal is fixed withan elastic piece which is corresponding to the contact, the lower side of the elastic piece is provided with a moving contact, the upper side of the first terminal is provided with a fixed contact, and the moving contact is corresponding to the fixed contact. The invention has the advantages of high accuracy of temperature control and good action reliability.