60results about How to "Assembly process requirements are low" patented technology

The invention provides a rolling rotor compressor pump body structure. The rolling rotor compressor pump body structure comprises a crankshaft, a first air cylinder, a second air cylinder, a first roller and a second roller, wherein the first roller is arranged in the first air cylinder, the second roller is arranged in the second air cylinder, and a first eccentric part matched with the first roller and a second eccentric part matched with the second roller are arranged on the crankshaft; the first air cylinder and the second air cylinder are adjacently arranged; the inner diameter of the first air cylinder is greater than that of the second air cylinder; the space between the first air cylinder and the second air cylinder is sealed by the first roller and the first eccentric part. The invention also relates to an air conditioner adopting the pump body structure. The rolling rotor compressor pump body structure has the advantages that the structure is simple, the requirements on an assembly technology are low, a compressor works stably, as a middle division plate is eliminated, the height of the pump body is reduced, the distance between an upper flange and a lower flange is shortened, the rigidity of the crankshaft is improved, and the alleviation of vibration and the lowering of noise of the crankshaft are facilitated. After the pump body structure is applied to the air conditioner, the vibration of the air conditioner is small, and the noise of the air conditioner is low.

The invention provides a low-speed large-torque downhole hydraulic motor and an operating method thereof. The low-speed large-torque downhole hydraulic motor comprises a flow distribution assembly, an axial reciprocating driving assembly, an axial rotary conversion assembly and a reverse turning preventing assembly. The axial rotary conversion assembly comprises a driving spindle, a power sleeve, a rotary sleeve, a first spring and a distribution valve, wherein the driving spindle is provided with an external straight-groove spline and an external threaded spline, the power sleeve is provided with an internal threaded spline groove and third clutch teeth, and the rotary sleeve is provided with fourth clutch teeth. The clutch teeth are arranged at the lower end of the power sleeve, the third clutch teeth make contact with the fourth clutch teeth at one end of the rotary sleeve, and the first spring is used for providing pretightening force. The external threaded spline on the driving spindle is engaged with the internal threaded spline groove in the power sleeve. The external straight-groove spline on the driving spindle is matched with a straight groove in the distribution valve. Compared with a screw motor, the low-speed large-torque downhole hydraulic motor is much lower in manufacturing cost, longer in service life, more excellent in fluid adaptability and capable of being maintained on site more easily.

The invention discloses a supporting structure for a coaxial light-small type reflecting mirror with high thermal stability, belongs to the technical field of aerospace, and aims to solve the problems of complicated structure, likeliness in system failure, high process level requirement and low interchangeability in the prior art. The supporting structure for the coaxial light-small type reflecting mirror with the high thermal stability comprises a reflecting mirror, a flexible joint and a core shaft, wherein an outer ring of the flexible joint is fixed with the reflecting mirror in a gluing way, and an inner ring of the flexible joint is fixed with the core shaft in a gluing way; the reflecting mirror, the flexible joint and the core shaft are coaxial; the flexible joint is of an annular structure and comprises an annulus and a plurality of single-arm structures; the single-arm structures are circumferentially and uniformly distributed on the outer wall of the annulus; each single-arm structure is a double-layer flexible unloading structure, two grooves are radially formed in the single-arm structure, and each groove is perpendicular to the diameter direction. According to the supporting structure for the coaxial light-small type reflecting mirror with the high thermal stability, a core shaft supporting mode is adopted; the external space of the reflecting mirror is not occupied; the structure is simple, and the surface shape of a mirror surface can be kept stable within a larger temperature change range; the whole optical system is convenient and quick to install and adjust, requirements on an assembly process are not high, and all parts are better interchangeable.

The invention discloses a breaker divide-shut brake keeping mechanism and belongs to the technical field of appliance switch protection. The breaker divide-shut brake keeping mechanism comprises a drive shaft (2), a sliding rod sleeve (5) connected with the drive shaft, a center shaft (7) matched with the sliding rod sleeve, a sliding rod shaft (6) sleeved with the sliding rod sleeve, a spring (8) connected to the sliding rod shaft in a sleeving mode, a second shaft (11) matched with a support (9), a movable contact (14) installed on the support, a fixed contact (15) matched with the movable contact, and a limiting gear (10) matched with the support to limit the distance between the movable contact and the fixed contact, wherein the support is connected with the sliding rod shaft through a first pin (12) and the first pin is matched with a third strip-shaped hole (9-2) formed in the support. By means of a bistable state keeping mechanism, the structural design is simplified, the requirement of the keeping mechanism for the manufacturing process and the assembling process is lowered, the brake dividing movement and the brake shutting movement of the contacts are more precise and reliable, and the brake dividing phenomenon caused by a non-load reason will not occur even the breaker divide-shut brake keeping mechanism is used on a shaking occasion.

The invention discloses a method for correcting corneal curvature instrument system astigmatism to correct the system astigmatism of a corneal curvature instrument. According to the method, noise filtering, binaryzation and edge extraction processing are carried out on a standard eye CCD image, centroids of all parts of an annular image divided according to angles are solved, the oval of the annular image is fitted, the mapping relation of corresponding points of the fitted oval and the excircle is calculated, the system error is obtained, and then the error correction is carried out on the actual measurement. The method has the advantages that the correction process is fast and accurate, and system hardware does not need to be modified.

The invention relates to an axial positioning and connecting structure of a cam shaft, comprising an independent machine body, a timing gear, a flat key, a cam shaft and a flywheel shell, wherein the cam shaft can be rotatably arranged in the independent machine body, the timing gear is arranged on the cam shaft and is connected with the flat key for realizing transmission, and the flywheel shell is fastened on the independent machine body by virtue of a flywheel shell fastening bolt. The axial positioning and connecting structure of the cam shaft is characterized in that an axial positioning block is arranged on one side of the flywheel shell, which is opposite to the timing gear, and the axial positioning block presses the end face of the timing gear to realize axial positioning of the cam shaft. According to the axial positioning and connecting structure of the cam shaft disclosed by the invention, the traditional mounting pressure plate is omitted, structural design and manufacturability are improved, rejection rate of a part is greatly reduced, and requirement for an assembly technology is also greatly reduced, and thus economic benefit is improved.

A grounding coplanar waveguide-rectangular waveguide filtering transition structure comprises a substrate (1), the upper and lower surfaces of which are plated with metal layers; a grounding coplanar waveguide transmission line (2), printed on the metal layer (1-1) on the upper surface of the substrate and used for inputting electromagnetic waves; a broadband filtering transition structure (3), etched on the metal layer (1-2) on the lower surface of the substrate, connected with the rectangular waveguide (5), comprising a feed branch knot (3-1), a short-circuit branch knot (3-3), a coupling branch knot (3-2) and a resonant cavity, and used for broadband transmission and out-of-band rejection performance of electromagnetic waves; and a first metalized via hole (4) penetrating through the substrate (1) and connecting the output end of the grounding coplanar waveguide transmission line (2) with the feed branch knot (3-1). According to the transition structure, on one hand, the broadband filtering transition structure (3) can be arranged at the bottom of the substrate (1) to be grounded so as to avoid large radiation loss, on the other hand, the working bandwidth of electromagnetic wave transmission can be increased through mutual coupling (3) among various resonant structures, and the transition structure has good out-of-band suppression filtering performance.

The invention discloses a transmission structure of a spiral spreading machine spiral distributor. The transmission structure comprises a spiral distribution box, wherein the spiral distribution box is internally provided with a driving wheel and a driven wheel driven by the driving wheel, and the driven wheel is arranged in the spiral distribution box through a bearing; the right part of the driven wheel is sequentially provided with a bearing end cover, a joint, an end plate, a main shaft fixing body and a spiral shaft, and the bearing end cover is fixedly connected on the spiral distribution box; the left end surface of the bearing end cover can press the driven wheel, the driven wheel drives the joint to rotate, and the end plate is provided with an embedding section embedded in driven teeth and a spacing section which can be used for spacing the joint; and the main shaft fixing body can be used for sealing the end plate on the right end of the joint, and the main shaft fixing body is connected with the spiral shaft and can drive the spiral shaft to rotate. The transmission structure provided by the invention has the advantages that the structure is simple, the use is convenient, the manufacturing accuracy on parts and the assembling process requirements on a whole mechanism are lower, the spiral shaft can be located and can be transferred with power through the assembling connection of the main shaft fixing body and the spiral shaft, and the operation reliability of the mechanism is guaranteed.

The invention provides a speed adjusting method for a direct-current brushless motor without a position sensor. The method comprises the following steps: (1) inputting alternating-current 220V voltage via an alternating-current power supply and a driving board, and rectifying the voltage to output direct-current 310V voltage; (2) outputting, by a switching power supply, 3.3V, 5V or 12V voltage output by rectifying to a control end, an amplifying circuit or a sampling circuit of a singlechip, an insulated gate bipolar transistor or an intelligent power module to supply power; (3) meanwhile, connecting 310V direct-current voltage output by rectifying to the insulated gate bipolar transistor or the intelligent power module to drive the direct-current brushless motor; (4) sampling counter electromotive forces of three phases U, V and W of the motor by the sampling circuit, and amplifying signals by the amplifying circuit; (5) performing analog-digital conversion on the acquired current signals by an AD of the singlechip; and (6) analyzing the revolving speed and the position of a rotor by adopting a perception algorithm without position detection to carry out closed-loop control. The method at least has the advantages that the revolving speed of the direct-current brushless motor can be accurately adjusted, the structure design is simplified, the size of the motor is reduced, the requirement of the assembly process is low and the like.

The invention relates to an axial positioning and connecting structure of a cam shaft, comprising an independent machine body, a timing gear, a flat key, a cam shaft and a flywheel shell, wherein the cam shaft can be rotatably arranged in the independent machine body, the timing gear is arranged on the cam shaft and is connected with the flat key for realizing transmission, and the flywheel shell is fastened on the independent machine body by virtue of a flywheel shell fastening bolt. The axial positioning and connecting structure of the cam shaft is characterized in that an axial positioning block is arranged on one side of the flywheel shell, which is opposite to the timing gear, and the axial positioning block presses the end face of the timing gear to realize axial positioning of the cam shaft. According to the axial positioning and connecting structure of the cam shaft disclosed by the invention, the traditional mounting pressure plate is omitted, structural design and manufacturability are improved, rejection rate of a part is greatly reduced, and requirement for an assembly technology is also greatly reduced, and thus economic benefit is improved.

The invention discloses a transmission structure of a spiral spreading machine spiral distributor. The transmission structure comprises a spiral distribution box, wherein the spiral distribution box is internally provided with a driving wheel and a driven wheel driven by the driving wheel, and the driven wheel is arranged in the spiral distribution box through a bearing; the right part of the driven wheel is sequentially provided with a bearing end cover, a joint, an end plate, a main shaft fixing body and a spiral shaft, and the bearing end cover is fixedly connected on the spiral distribution box; the left end surface of the bearing end cover can press the driven wheel, the driven wheel drives the joint to rotate, and the end plate is provided with an embedding section embedded in driven teeth and a spacing section which can be used for spacing the joint; and the main shaft fixing body can be used for sealing the end plate on the right end of the joint, and the main shaft fixing body is connected with the spiral shaft and can drive the spiral shaft to rotate. The transmission structure provided by the invention has the advantages that the structure is simple, the use is convenient, the manufacturing accuracy on parts and the assembling process requirements on a whole mechanism are lower, the spiral shaft can be located and can be transferred with power through the assembling connection of the main shaft fixing body and the spiral shaft, and the operation reliability of the mechanism is guaranteed.

Disclosed is a miniature circuit breaker. The miniature circuit breaker mainly overcomes the defects of existing miniature circuit breakers that the structure of a tripping mechanism is complicated, requirements for the assembly technique are high, reliability is low, productive efficiency is low, and due to the facts that restoration is achieved through tension springs mostly and restoration inaccuracy is caused easily after the tension springs are used for a long time, the service life of the circuit breakers is affected. The miniature circuit breaker is characterized in that a hinging column is sleeved with a latch torsion spring, the two ends of the latch torsion spring abut against a jump pin and a latch respectively, a moving contact hinging shaft is sleeved with a moving contact torsion spring, the two ends of the moving contact torsion spring abut against a moving contact and a support respectively, the hinging column is further sleeved with a support torsion spring which is arranged on the back portion of the support, and the two ends of the support torsion spring abut against the support and the inner wall of a shell. According to the miniature circuit breaker, the torsion springs are arranged between the jump pin and the latch, between the moving contact and the support and between the support and the inner wall of the shell for restoration, restoration is accurate, deviation is avoided, and the service life of the circuit breaker is effectively prolonged.

The invention provides a sensor for a heart blood pump and the heart blood pump, the sensor comprises a static pressure sensing end arranged on a heart blood pump conveying sleeve, and the static pressure sensing end is used for detecting the static pressure of blood flowing through the outer side of the conveying sleeve; the static pressure sensing end comprises a pressure sensing film chip and an optical signal transmission line, the pressure sensing film chip is provided with a pressure sensing face making contact with blood, and the pressure sensing face is parallel to the axial direction of the conveying sleeve. The pressure sensing membrane chip obtains static pressure signals in the direction perpendicular to the blood flow direction and transmits the static pressure signals out through the optical signal transmission line. According to the sensor, the pressure sensing face is parallel to the blood flowing direction, the blood static pressure is directly measured, a blood retention area does not need to be arranged at the static pressure sensing end to measure the blood static pressure, thrombus is avoided, it is guaranteed that the blood static pressure can be measured when blood flows, and the sensor can be used for short-term and long-term heart blood pump support.