189results about How to "Reduce assembly accuracy" patented technology

The invention discloses a floating auxiliary roller type overrun clutch which comprises an outer ring, an inner ring, rolling bodies and auxiliary rollers, wherein engagement spaces used for being engaged with or separated from the rolling bodies are formed between the outer ring and the inner ring; the auxiliary rollers are parallel to an axial line of the overrun clutch and are spaced from the rolling bodies; and the auxiliary rollers are arranged between the rolling bodies in such a way that the auxiliary rollers can move in a circumferential direction of the overrun clutch. According to the floating auxiliary roller type overrun clutch, the processing of a limiting seat is avoided, the processing process is simplified, the working efficiency is improved, and the processing cost is reduced; as the auxiliary roller structure is adopted, the axial length of the overrun clutch and the rolling bodies can be theoretically infinitely prolonged, the engagement length is prolonged, the bearing capacity of the overrun clutch is increased, the radial size of the overrun clutch under higher bearing capacity is reduced, and the service life of the overrun clutch is prolonged; and meanwhile, the probability of imbalance caused by application of a pretension force to point contact of each roller in the prior art is removed, thereby enabling each roller to keep parallel to the axial line of the inner ring.

The invention discloses a heavy-duty overrunning clutch, which comprises an outer ring, an inner ring, a plurality of rollers and a retaining frame. The retaining frame comprises a support ring I, a support ring II and a plurality of support columns corresponding to the rollers. Spring plates are fixedly arranged on the support columns along the axial direction and are used for applying pre-tightening force on the rollers along the engagement direction of an engagement slot. The direct processing of a limit seat on the outer ring can be avoided, the working efficiency can be increased, the processing cost can be reduced, the service life can be prolonged, and the transmission effect can be guaranteed. Moreover, relevant components can be replaced easily after being damaged, the outer ringneeds not to be rejected as a whole, and the cost of maintenance and use can be reduced. The axial length of the overrunning clutch and the rollers can be increased theoretically indefinitely, the engagement length can be increased, and thus the bearing capacity of the overrunning clutch can be improved. Meanwhile, the pre-tightening force can be applied at multiple points of the rollers according to needs, and the limiting balance for the rollers can be guaranteed while the axial length is ensured, so that the rollers cannot deviate from the axial line of the inner ring. Therefore, the stable operation of the overrunning clutch can be ensured, and mechanical failure can be avoided.

The invention discloses a magnetic latching relay comprising a magnetic circuit part, a contact part and a counterforce reed. The magnetic circuit part is composed of a coil, an E-shaped static magnetizer component and a moveable magnetizer component; the coil is wound on the static magnetizer component and a movable magnetizer component comprises a magnetic steel and a movable magnetizer arranged at the both sides of the magnetic steel with the same structure, the E-shaped static magnetizer component is formed by connecting two magnetizers and at lease one magnetizer is provided with a U-shaped structure. The magnetic circuit takes the shape of 'two squares stacked vertically', solves the problem of unevenness of magnetic circuit contact surface and enhances the stability of product performance; the static magnetizer of the magnetic circuit part adopts the U-shaped structure, and the movable magnetizer adopts two same U-shaped or similar structures; therefore, the manufacture difficulty of parts and assemble difficulty and precision of components are reduced, the counterforce reed causes the absorbing counterforce of the relay in working state to be balanced, thus enhancing the reliability.

The invention relates to a whiffletree support structure applied to the statically determined support of a large-aperture reflector. The whiffletree support structure comprises a rotary shaft, a cross bar, a polishing pad, a rotary shaft and cross bar connection screw, a rotary shaft and cross bar positioning pin, a lens body back bonding part, a flexible rod and lens back bonding part connection screw, a flexible rod and lens back bonding part positioning pin, two flexible rods, a cross bar and flexible rod connection screw, a cross bar and flexible rod positioning pin, a polishing pad and rotary shaft connection screw, and a polishing pad and rotary shaft positioning pin. According to the invention, the number of support points of a reflector is increased on the condition that no extra-constraint is adopted. In this way, the resistance of the reflector to the gravity-caused deformation is effectively improved and the accuracy of the mirror surface of the reflector is also increased. The rotary shaft and the flexible rods are embedded into the design of the cross bar, so that the problem that the Whiffletree support structure is overlarge in dimension along the optical axis direction of the reflector can be effectively solved. The engineering implementation is facilitated.

The present invention prevents a defective display attributed to a non-uniform gap between a display element and a backlight which is caused by a phenomenon that an inner wall of a mold casing is shaved off by an end periphery of the display element and a shaved-off debris remains between the casing and the display element. Guide projections are integrally formed on an inner wall of a picture-frame-like portion of the mold casing and, at the same time, a gap which accommodates the shaved-off debris is formed between the guide projection and a bottom portion of the mold casing.

The invention relates to a fiber array board assembly device and a fiber array board assembly platform using the same. The fiber array board assembly device comprises an L-shaped positioning base and a clamp component. The L-shaped positioning base comprises a side wall and a base. A positioning block is fixedly connected to the inner side of the side wall. A pressure block parallel to the positioning block is also movably connected to the inner side of the side wall. The pressure block can horizontally move along the inner side of the side wall. The inner side of the side wall is further provided with a clamp groove. The base is provided with a through hole. A lifting member and a support member are disposed in the through hole. A U-shaped support is disposed on two side walls of the clamp component. An elastic member is arranged between the bottom of the U-shaped support and the bottom of the clamp component. A glass pressure block is arranged between two ends of the U-shaped support. One end of the clamp component is provided with a protrusion which is clamped in the clamp groove. The lifting member controls the U-shaped support to ascend and descend through the support member.

The invention discloses an electric-driven self-pressurization rotor-type energy recovery apparatus which includes a pressure relieving part shell body, a brine end shell body, a support cylinder body, a seawater end shell body and a low-pressure seawater interface which are successively fixed to each other. A brine distribution rotating disk which is disposed in the brine end shell body and a seawater distribution rotating disk which is disposed in the seawater end shell body are connected to each other through a central shaft. A plurality of water pressure cylinder sets are arranged in the support cylinder body, wherein each water pressure cylinder set is composed of a large-diameter water pressure cylinder and a small-diameter water pressure cylinder which are connected to each other in series. The large-diameter water pressure cylinder is fixedly connected to the brine end shell body and the small-diameter water pressure cylinder is fixedly connected to the seawater end shell body. One piston is disposed in the large-diameter water pressure cylinder and the other piston is disposed in the small-diameter water pressure cylinder. Two pistons, which are disposed in the same water pressure cylinder set, are connected to each other through a piston rod. The brine distribution rotating disk and the seawater distribution rotating disk are driven by a motor. With energy of residual pressure of high-pressure brine, the pressure of raw material seawater can be increased to a level required by a membrane assembly without additionally increasing the pressure by a booster pump.

The invention provides a press mounting apparatus and press mounting method of a semiconductor valve string. The press mounting apparatus comprises a horizontal workbench arranged on a frame, the horizontal workbench is provided with a guiding support mechanism used for guiding and supporting each device in a semiconductor valve string to be press-mounted, a force application mechanism is arranged at the end of a guiding direction on the frame, and the force application direction of the force application mechanism is the same as the guiding direction. The advantages are as follows: each device in the semiconductor valve string is horizontally placed on the guiding support mechanism for assembling, compared to a conventional vertical accumulation placement method, the method reduces transport paths, and therefore, the labor intensity is low and the assembling efficiency is high. Besides, the semiconductor valve string does not have to be hoisted and moved after being assembled, pressure loading can be carried out directly by use of the force application mechanism, the press-mounting efficiency and the automation degree of the whole press-mounting operation are improved, and the press-mounting precision is effectively guaranteed. At the same time, the height of the horizontally arranged semiconductor valve string is greatly reduced, and the press-mounting stability of the semiconductor valve string is improved.

A region including an engaging hole is given surface treatment such as partial quench hardening by induction hardening for improving surface hardness of the region. The partial quench hardening by induction hardening provides the region with satisfactory mechanical strength or surface hardness enough for resisting deformation of the engaging hole and wear-out of an edge of opening of the engaging hole caused by putting in and out of the lock pin.

The invention relates to an environment-friendly aluminum alloy automobile sub-frame. The environment-friendly aluminum alloy automobile sub-frame is of a bilaterally symmetrical structure, is made of aluminum alloy, and comprises a front cross beam, a front automobile body left installing part, a front automobile body right installing part, a rear automobile body left installing part, a rear automobile body right installing part, a left longitudinal beam and a right longitudinal beam, wherein the front automobile body left installing part and the front automobile body right installing part are welded and connected through the front cross beam; the rear automobile body left installing part and the rear automobile body right installing part are connected in a butt welding mode; the front automobile body left installing part and the rear automobile body left installing part are welded and connected through the left longitudinal beam; and the front automobile body right installing part and the rear automobile body right installing part are welded and connected through the right longitudinal beam. All use performance indexes such as the strength and the rigidity of the sub-frame can be effectively ensured. The environment-friendly aluminum alloy automobile sub-frame has the advantages that parts are few; the manufacturing process is simple; and the light-weight effect is obvious. On one hand, the workload is greatly reduced; on the other hand, the assembly precision problem due to welding deformation can be reduced; and in addition, the projection area of a single part is not large, so that the goal can be achieved by an ordinary extrusion casting machine.

The invention relates to a variable displacement swash plate compressor. A swash plate driving mechanisms with a flexible driving balance design is provided, has proper flexibility during work, overcomes unbalanced force and moment acting on the swash plate, improves vibration, noise, kinematic pair blockage and excessive wear caused by the unbalanced force and moment, and reduces machining and assembly precision of related workpieces; a piston with a spiral linear oil groove is provided and stores oil, and through the reciprocation of the piston and the acceleration change of the piston, lubricating oil flows reasonably between the kinematic pair and is uniformly distributed on the cylindrical surface of the piston and the peripheral surface of the cylinder to improve the sealing and lubricating properties between the piston and the peripheral surface of the cylinder, improve the performance of the compressor and prolong the service life of the piston; and a cylinder cover capable of being formed at one time through die casting and having simple process is provided, and suction and discharge channels adopt a single-section or multi-section expansion chamber-type cavity consisting of alternate contraction sections and expansion sections to improve the vibration and air flow noise caused by suction and discharge pulsation.

In a hydraulic tensioner a cylindrical plunger slidably protrudes from a plunger-accommodating hole in a tensioner housing. A check valve unit allows oil to flow under pressure into a high pressure chamber formed by the plunger and the housing, but blocks reverse flow. The plunger is biased in the protruding direction by a spring located in the high pressure chamber. The plunger has an annular groove in its outer circumferential surface, and a C-shaped ring disposed in the groove is resiliently biased radially outwardly against the inner circumferential wall of the plunger-accommodating hole. A radial clearances is provided between the ring and the bottom of the groove, and the ring also fits into the groove with an axial clearance.

The invention relates to a surgical incision stitching instrument, comprising a support rod, a nail propping seat component, a nail pushing mechanism and a limit mechanism, wherein a cover with handles, the nail pushing mechanism and the limit mechanism are fixed at the rear part of the support rod; the nail propping mechanism is connected at the front part of the support rod and comprises a nail propping seat with an opening on one side, an anvil block fixed at the front part of the nail propping seat, and a nail bin and a knife holder arranged at the rear part of the nail propping seat; a blade fixed on the knife holder penetrates through the nail bin and is positioned in the middle of nail lines; each nail pushing piece on the knife holder is arranged in each nail line of the nail bin; the sections of the nail propping seat, the anvil block, the nail bin, the knife holder and the blade are arranged to be in the shape of a polygon with more than three sides; two ends of an internal locating pin on the closed side of the nail propping seat are respectively arranged on the nail bin and the anvil block; an external locating pin is arranged on the nail bin in a penetrating way, the rear end of the external locating pin is connected with a sliding seat, and the front end of the external locating pin corresponds to a location hole on the anvil block; and an internal guide sleeve and an external guide sleeve are respectively arranged on the internal locating pin and the external locating pin and can move front and back relatively. The surgical incision stitching instrument has a simple structure and can enhance assembly efficiency and reduce manufacturing cost.

The invention discloses an automatic grain sampler. The automatic grain sampler comprises a longitudinal traveling cart which is arranged on longitudinal traveling tracks, two transverse traveling trolleys which are arranged on transverse traveling tracks of the longitudinal traveling cart, and fiche chain transmission lifting mechanisms which are arranged on the transverse traveling trolleys. The automatic grain sampler is characterized in that: a longitudinal traveling cart reducing motor drives a driving shaft of the cart by a chain wheel, and traveling wheels of the cart which are positioned at both ends of the driving shaft and a driven shaft of the cart are arranged on the longitudinal traveling tracks; the two transverse traveling trolleys have the same structure, a driving sprocket of a transverse traveling reducing motor shaft of one trolley is connected with a driven sprocket of a transverse traveling reducing motor shaft of the other trolley through a trolley chain, and moving rollers of the trolleys are arranged on the transverse traveling tracks; and driving sprockets of fiche lifting reducing motor shafts of the fiche chain transmission lifting mechanisms are connected with driven sprockets of sprocket adjustment shafts of the trolleys through fiche chains, and the fiche chains are fixedly connected with fiches. The automatic grain sampler has the advantages of simple structure, high manufacturing and assembly processability, low cost, high performance-price ratio and the like, and can be operated stably.

The invention discloses a sheet laser scanning filler wire welding method. The method comprises the following steps that S1, before welding, a semi-V-shaped or semi-U-shaped groove is machined in a bottom plate of a to-be-welded right-angled structure of a to-be-welded workpiece; S2, welding wires are fed into the groove, and laser beams are focused to the welding wires; and S3, required laser welding technological parameters are set, and laser scanning filler wire welding is performed under protective gas. According to the sheet laser scanning filler wire welding method provided by the invention, on the basis of the regular T-shaped or L-shaped right-angled welding structure, the semi-V-shaped or semi-U-shaped groove is formed, the assembly precision of the right-angled structure can be greatly reduced, stacking and sinking of weld joints are effectively controlled, splashing on the surfaces of the weld joints is reduced, and the surfaces of the weld joints are smother; welding deformation of the sheet right-angled structure can be reduced while heat input is reduced, and the porosity rate is decreased; and metallurgical bonding of the welding wires and a base can be promoted, thesheet welding efficiency is improved, and the weld joints with the good quality are formed.

The invention discloses a method for controlling welding deformation of a telescopic steering oar base seat barrel, and relates to the material molding and controlling filed. The method for controlling the welding deformation of the telescopic steering oar base seat barrel includes steps: S1, equally dividing the outer perimeter of the top of the barrel into a plurality of measurement segments, setting a measurement point in the middle position of each measurement segment, arranging a plurality of welding segments which are in one to one correspondence with the plurality of the measurement segments on the outer perimeter of the bottom of the barrel, and measuring flatness of a flange through each measurement point; S2, starting from the welding segment corresponding to the measurement segment where the measurement point with the maximal flatness value of the flange is located to perform welding once, and welding at least one welding segment every time; S3, after welding once, re-measuring the flatness of the flange, moving to the step S2 to perform welding once again, and repeating the step 2 and the step 3 until welding of all the welding segments are finished. The method for controlling the welding deformation of the telescopic steering oar base seat barrel reduces assembly accuracy of the barrel, improves production efficiency, and effectively controls the flatness of the flange.

A fluid dynamic pressure bearing device that achieves high rigidity against moment without a reduction in assembly accuracy and bearing performance. In the bearing device, bearing sleeves are arranged in the axial direction and coaxiality of radial bearing surfaces formed on the inner peripheral surfaces of the bearing sleeves is set to 3 [mu]m or less. This secures width accuracy between the radial bearing gaps to prevent a reduction in bearing performance and a failure such as wear etc. caused by contact between a shaft member and the bearing sleeves. Further, a first radial bearing surface and a second radial bearing surface are provided on at least one sleeve, and this allows a sleeve assembly constructed from bearing sleeves to be supported at least three positions in the axial direction in a process of assembling the sleeve assembly. As a result, assembly work can be carried out with two bearing sleeves prevented from being bent in the middle and highly accurate coaxiality between both bearing sleeves secured.

The invention discloses a micromirror-based time division shared window laser radar system. A first through hole is formed in a single-face reflector; a second through hole is formed in a second single-face reflector; a laser beam generated by a laser is divided into two paths; one path of laser beam is emitted to a micromirror through the first through hole and then is emitted to a detection target through the micromirror; the other path of laser beam is emitted to the second single-face reflector after passing through delay optical fiber, is emitted to the micromirror through the second through hole and is emitted to the detection target through the micromirror; and an echo light beam reflected by the detection target is reflected to the first single-face reflector and the second single-face mirror by the micromirror and then is converged to a light detector through a converging lens. The echo light beams of two beams of emergent laser are separated in a time domain by the delay optical fiber, so that two paths of echo light beams can be detected simultaneously by one group of detector, the system structure is further simplified, the volume of the system and the number of parts are reduced, the cost is saved and the assembling precision of the system is reduced.

The invention relates to an alignment detection device for photoetching equipment. The device comprises a wafer stage reference board, the lower surface of which is provided with a transmission type mark for mask alignment; a photon conversion crystal, the center of which is aligned with the center of the corresponding transmission type mark, for converting ultraviolet light into visible light; an optical support for installing the photon conversion crystal; an isolation board for isolating light propagation and an external heat source; an optical filter installed on the isolation board for filtering useless light beyond the visible light band; and a fiber directly connected to the optical filter.