55results about How to "Small speed change" patented technology

A connection wire is connected to a part of a rear door popped up in a door-opening direction by an urging force. A pulley rotates responsive to a driving motor inside a wire-winding device to wind the connection wire thereon. In this manner, the rear door is automatically closed. The pulley is urged in a connection wire-winding direction by a power spring. A clutch is between the pulley and the driving motor. When the rear door is pressed by an operator's hands in a door-closing direction while the rear door is being closed, the pulley is rotated by the power spring, thus winding the connection wire thereon and preventing the connection wire from becoming loose. At this time, the connection between the pulley and the driving motor is cut off by the clutch. Thus, the pulley is rotated by the power spring freely and rapidly. In this manner, the rear door can be closed manually even while it is being closed automatically. Further, the connection wire can be prevented from becoming loose and from being sandwiched between the body of the vehicle and the periphery of a rear opening thereof.

A motor controller capable of suppressing a large speed change generated at the time of changeover from a synchronous operation mode to a position feedback operation mode and implementing even acceleration characteristics regardless of the load torque by estimating a torque of a permanent magnet motor in the synchronous operation mode for driving the permanent magnet motor and setting an initial value of a current command value in a position sensor-less operation mode on the basis of information of the torque estimated value.

The invention discloses a control method of an air conditioner, a control device of the air conditioner and the air conditioner. The air conditioner comprises a coolant system, a throttle device and a variable frequency compressor; the coolant system is connected with an indoor-outdoor heat exchanger; the throttle device is connected with the indoor-outdoor heat exchanger; the variable frequency compressor drives coolant to circulate. The control method includes the steps of controlling the variable frequency compressor of the air conditioner to start with a first frequency when the air conditioner is in a silent mode; with a first preset time passing by, controlling the variable frequency compressor to increase in frequency at a first preset rate; judging whether or not current frequency of the variable frequency compressor reaches a value corresponding to a set noise value set in the silent mode; if yes, controlling the variable frequency compressor to stop increasing in frequency. The control method according to the embodiment has the advantages that flow of the coolant and impact thereof can be effectively reduced, leading to reduced coolant noise and mechanical noise, interference is avoided for users, and user experience is improved.

The invention discloses an air conditioner and a control method and device thereof. The air conditioner comprises a coolant system, a throttle device, an outdoor fan and a variable frequency compressor; the coolant system is connected with an indoor-outer heat exchanger; the throttle device is connected with the indoor-outdoor heat exchanger; the variable frequency compressor drives coolant to circulate. The control method includes the steps of controlling the variable frequency compressor of the air conditioner to start with a first frequency when the air conditioner is in a silent mode; with a first preset time passing by, controlling the variable frequency compressor to increase in frequency at a first preset rate; judging whether or not the flow of the coolant reaches first preset flow; if yes, controlling the variable frequency compressor to stop increasing in frequency. The control method according to the embodiment has the advantages that flow of the coolant and impact thereof are effectively reduced, leading to reduced coolant noise and mechanical noise, interference is avoided for users, and user experience is improved.

The invention relates to a groove-type anode fast recovery diode with bipolar Schottky control and a manufacturing method thereof. The diode includes a cathode metal, Above the cathode metal there isan N-type intrinsic region, Above the N-type intrinsic region there is an anode metal, the cathode metal is provided with a lightly doped N-type region and a heavily doped N-type region spaced apart from each other, the bottom of the lightly doped N-type region is in Schottky contact with the cathode metal, A heavily doped P-type region and a lightly doped P-type region are arranged between the N-type intrinsic region and the anode metal, and the upper surface of the heavily doped P-type region is lower than the upper surface of the lightly doped P-type region, so that a groove-type anode region is formed, and the lightly doped P-type region is in Schottky contact with the anode metal. The manufacturing method of the groove-type anode fast recovery diode with bipolar Schottky control is characterized in that Schottky contacts of an anode surface and a sidewall can be simultaneously formed by one-step etching.

The invention relates to a mechanical plate shearing machine, in particular to a mechanical plate shearing machine utilizing a swing guide rod mechanism. The structure is that a cover plate is fixedly installed at the upper end of a lateral support I and a lateral support II of the plate shearing machine. T-shaped supports are symmetrically installed at two ends on the lower side of the cover plate, the upper ends of the T-shaped supports are fixed with the cover plate, and the lower ends of the T-shaped supports are sleeved on two sides of a spindle in empty mode. Execution mechanisms are symmetrically installed on the spindle section between the lateral support I and one T-shaped support and between the lateral support II and the other T-shaped support. The mechanical plate shearing machine has the advantages of being novel in structure, convenient to modify, low in cost, safe, good in economy and safety and the like, thereby being a novel mechanical plate shearing machine integrating economy and practicability.

The present invention relates to an aircraft comprising a fuselage (1), a propulsion unit (7) at the rear tip of the fuselage and at least two engines (3, 5) each driving an engine shaft (32, 52), the propulsion unit including at least one propeller (71, 73) driven mechanically by the engine shafts (32, 52), characterised in that the propulsion unit (7) includes two propellers (71, 73), each of the propellers being driven by a propeller shaft (72, 74), the two propeller shafts being driven by the engine shafts (32, 52) via a first differential epicyclic gear train (40). Specifically, the input of the first differential gear train (40) is connected to the output of a second differential epicyclic gear train (60), the second differential gear train (60) including two inputs (61c2, 62c2), each of said two inputs being connected mechanically to one of said engine shafts (32, 52).

The invention discloses a conductive liquid micro driving device and applications thereof. Multiple rectangular coils form a coil array, multiple sequentially-arranged electromagnetic poles are formed, insulation layers are arranged among wires of the rectangular coils, magnetic conductive layers fills gaps of the wires of the rectangular coils coated by the insulation layers and the outer parts, a sealing cover realizes functions of three protection and mechanics and the like, inverters are connected with the rectangular coil array, a time-varying electric field generates a traveling wave magnetic field in the same direction and an electromagnetic force, the electromagnetic force drives the conductive liquid to flow, a flexible substrate can be connected with a selected mounting part, and a pipeline inner wall or an outer wall phase in a different shape can be matched. Accurate control on different components, the flow amount, the flow direction and the flow speed of the conductive liquid can be realized, and the conductive liquid micro driving device has the advantages that the overall structure is compact; the device is flexible and deformable; pressed driving does not exist; no push rod mechanism is needed; the pipeline can be cleaned by itself; assembly and disassembly are convenient; the space utilization rate is high; the application range is wide; the use is simple; portability is realized; the noise is small; the service life is long and the like.

The invention discloses dual-layer-flow liquid first wall cladding applicable to a magnetic confinement fusion reactor. The cladding structurally comprises a vacuum chamber, liquid metal injection pipes at the top of the vacuum chamber, an outer cladding back wall adopting a spiral insulated runner structure, an inner cladding back wall and a bottom liquid metal discharge structure. In order to solve problems of the MHD (magnetohydrodynamics) effect, the thinning effect and the like encountered by a liquid first wall during application to the fusion reactor, a special structural design is adopted: for inner cladding, the inlet injection pipes inject a liquid metal downwards from the top of the vacuum chamber along the inner cladding back wall; for outer cladding, the liquid metal is injected in the circumferential direction of the vacuum chamber, is closely attached to the outer cladding back wall and flows downwards under the effect of the centrifugal force produced due to the inertia, and overwhelms a spiral insulated runner arranged on the outer cladding back wall, so that a circumferential flow in the insulated runner and a free surface flow outside the runner are formed. The liquid metal finally flows into the bottom liquid metal discharge structure and is applied to heat transfer, tritium extraction and recycling, and the problems of the MHD effect and the thinning effect can be effectively solved.

The invention relates to the technical field of numerical control laser cutting machines, in particular to a quick circular arc cutting method. The quick circular arc cutting method comprises a step of conducting circular arc cutting through processing software of a laser cutting machine which is controlled by a computer, and is characterized by comprising the following steps: starting the processing software of the laser cutting machine, conducting laser cutting from a first circle; after laser cutting of the first circle; judging the positional relation between the next circle and the current circle and whether the circles are in the same direction; if yes, connecting an external common tangent and finding the next circle, or connecting an internal common tangent and finding the next circle; generating a novel cutting track, and cutting a second circle; after cutting of the second circle, judging whether the circle is the last one. Compared to the prior art, the circles to be cut can be connected along the tangent, the whole processing track is in smooth connection, and the machine tool cannot be greatly reduced in speed during the cutting process, so that the time can be greatly shortened.

This invention discloses a bicycle stepless automatic gear transmission, which uses the planetary gear as the main structure, including the pallet whose axis sets on the trailing wheel axis of bicycle, the planetary gear suit setting in the pallet and the braking device fixing on the frame; the chain wheel fixing on the planetary gear frame is the driving wheel, the sun gear fixing on the trailing wheel coaxially is the passiveness wheel, the braking device acts on the planetary gear suit by the adjustable designed friction braking force, when the drag is different caused by the change of the road situation, the ring wheel will produce different rotate speed along with it, thus it can change the gear ratio of the whole gear transmission automatically and steplessly, which can make driver in comfortable situation on any road situation.

The invention relates to a double-sided Schottky controlled fast recovery diode device and a preparation method. The fast recovery diode device comprises a semiconductor substrate, the semiconductor substrate comprises an N-type substrate and an N-type buffer layer, and an active region is arranged in the central area of the N-type substrate. On the cross section of the diode device, the active region comprises a number of alternately distributed active P-columns and active N-columns. Anode metal is arranged on the N-type substrate. The active P-columns are in ohmic contact with the anode metal on the N-type substrate, and the active N-columns are in Schottky contact with the anode metal on the N-type substrate. A number of alternately distributed cathode P- regions and cathode N+ regionsare arranged on the N-type buffer layer, the cathode N+ regions are in ohmic contact with cathode metal, and the cathode P- regions are in Schottky contact with the cathode metal. Fast reverse recovery can be realized, the dynamic loss can be reduced, the excellent softness can be improved, and the device has high reliability.

A release layer (2), which contains fluoropolymers is applied on a die surface (1a) of a shaping die (1), and is baked. An elastic layer (3) is applied onto the external surface of the release layer and is baked. A supporting layer (4) containing heat-resistant synthetic resin is applied onto the external surface of the elastic layer, and is dried. The dried supporting layer is polished to remove the unevenness, and the supporting layer is baked. The release layer, the elastic layer and the supporting layer are turned inside out to be removed from the die surface. The evenness of the fixing belt is improved, and the pressure unevenness is reduced.

It is described a winding apparatus for wrapping a material around a core of flat shape that rotates around a rotation axis rotating in its turn with a circular trajectory, controlling the laws of motion both of the core rotation around its axis and of the circular trajectory of its rotation axis, motor driven independently by means of electric cams, such as to cancel the variations of position and speed of the material at the entrance of the core The winding apparatus is used for producing electric energy accumulating devices.

A process fluid lubricated pump includes a pump having a pump shaft extending from a drive end to a non-drive end, first and last stage impellers, a drive unit exerting torque on the drive end to rotate the pump shaft, a balance drum connected to the pump shaft between the pump and the drive end, the balance drum defining a drum front side facing the pump and a drum back side, a relief passage between the balance drum and a first stationary part configured to be stationary with respect to a housing, the relief passage extending from the drum front side to the drum back side, the pump shaft radially supported in a non-contacting manner during operation of the pump, and a hydrodynamic radial pump bearing supporting the pump shaft, the radial pump bearing arranged at the non-drive end or at the drive end of the pump shaft.

The invention discloses a well kiln type transplanting and cavity forming mechanism. The well kiln type transplanting and cavity forming mechanism comprises a cavity forming frame body, wherein two non-circular gear mechanisms having the same structure are mounted on the cavity forming frame body; the two non-circular gear mechanisms are in front-and-rear parallel arrangement in the movement direction of the cavity forming frame body; a power transmission mechanism is in transmission between the two non-circular gear mechanisms; cavity forming cranks are respectively and fixedly connected to output ends of the two non-circular gear mechanisms; the two cavity forming cranks are arranged in parallel, and a crank connecting shaft is fixedly mounted at the top end of each of the two cavity forming frame bodies; a cavity forming connecting rod which is horizontally arranged is hinged between the two crank connecting shafts; two bevel gear commutators which correspond to the two crank connecting shafts are fixedly mounted at the bottom end of the cavity forming connecting rod; a gear mechanism is in transmission between each bevel gear commutator input shaft and a corresponding crank connecting shaft; and each bevel gear commutator output shaft is vertically arranged downwards, and a cavity forming machine which is vertically arranged downwards is fixed to the bottom end of each bevel gear commutator output shaft. The well kiln type transplanting and cavity forming mechanism disclosed by the invention is reasonable in design, can form an approximately cylindrical well kiln regular in shape, and can be used for meeting requirements of insulating, moisturizing and the like of the well kilns.

The invention discloses a braking distance judgment system for emergency braking of a truck and a judgment method. The problem that when large heavy cargos are carried in a cargo compartment, a truck head is likely to be damaged due to the fact that the cargos rush forwards and move in the emergency braking process, and thus safety accidents are caused is solved. The braking distance judgment system comprises a control unit (1) connected with a braking system, one or more pressure sensors arranged on the inner wall in the front of the compartment and an acceleration sensor (3) arranged on a truck body and connected with the control unit (1). A distance sensor (6), a storage unit (7) and a gyroscope (8) are connected to the control unit (1). The pressure sensors (4) are all connected to the control unit (1). By the adoption of the braking distance judgment system, the speed variation rate during emergency braking can be adjusted effectively through the control unit, the situation that the cargos rush forwards during emergency braking, and the safety of drivers is influenced is prevented, and the position with the maximum forward-rush pressure can be effectively detected while the protective capability is enhanced.