21results about How to "Eliminate installation gaps" patented technology

The invention provides a soft soil tunnel steel arch mounting device and a using method thereof. The soft soil tunnel steel arch mounting device comprises a plurality of bottom plates, lifting mounting tables are arranged on the bottom plates, jacking devices are arranged between the bottom plates and the mounting tables, compacting devices are arranged at the bottoms of the bottom plates, each compacting device comprises a settlement sensing device, a jacking device and a jacking rod, and the jacking rods are mounted at the bottoms of the bottom plates. When the bottom of the bottom plate settles, the solid agent extends into the air bag to generate air and increase the pressure of the jacking device so as to fill the bottom of the bottom plate, inclination of the whole device caused by settlement is avoided, and meanwhile, jacking force of the jacking device is transmitted to the bottom plate through the jacking rod so that the bottom plate can bear supporting force of the bottom. And the whole device is further prevented from inclining. A gap between the bottom plate and the tunnel when the tunnel steel frame is installed is avoided, and the phenomena that in the long-term use process of the tunnel, the tunnel foundation is prone to sinking, the overall structure deforms or collapses, the bearing capacity is reduced, and the stability of the tunnel is affected are avoided.

The application discloses a pipeline welding support device, which comprises a pushing unit, a pressing plate, an insertion block connected with the pressing plate, a floating sleeve arranged on the inner side of the pressing plate, and an elastic sheet arranged in the floating sleeve; an extrusion unit is arranged for pushing the pressing plate to move downwards; a push rod is arranged on the inner side of the floating sleeve, a through hole is formed in the inner part of the floating sleeve, and the end of the elastic sheet penetrates into the inner side of the through hole; the end of the push rod is connected with a clamping jaw; a base support is arranged for bearing corresponding pipelines and fixing the position of the pipelines by matching the clamping jaw with the inner wall of the base support; the extrusion unit pushes the pressing plate to move, the insertion block and the elastic sheet can be in contact, the elastic sheet is expanded under pressure and in contact with the inner wall of the through hole, and the position of the push rod and the pressing plate is fixed. The pressing plate is pressed downwards to drive the insertion block to move, the push rod is further driven to move close to the side wall of the pipeline, and the installation gap between the clamping jaw and the pipeline is eliminated, so that the stability of the pipeline clamping is ensured.

The present invention discloses a baffle shell-and-tube heat exchanger with a longitudinal sealing structure, comprising a cylinder, a tube sheet, a heat exchange tube, and a baffle. A longitudinal sealing structure is provided at the matching portion between the baffle and the cylinder; the longitudinal sealing structure is a semicircular ring-shaped sealing sheet group, a groove matching the sealing sheet group is provided on the baffle, and the sealing sheet group is fixed to the baffle by bolts; the sealing sheet group includes two or more sealing sheets, sealing teeth are provided on the outside of the sealing sheets, a compensation seam is provided between adjacent sealing teeth, and adjacent sealing sheets are arranged in a staggered manner. The inner diameter of the sealing sheet is greater than the outer diameter of the tube bundle, the outer diameter of the sealing sheet is greater than the inner diameter of the cylinder, and the diameter of the circle where the root of the sealing teeth is located is smaller than the inner diameter of the cylinder. The present invention effectively ensures the positioning accuracy of the sealing sheet, greatly improves the sealing performance and the reliability of the seal, and improves the adaptability to the unevenness and out-of-roundness of the cylinder; at the same time, it also reduces the penetration resistance. In addition, the dead zone phenomenon is reduced, and the heat exchange efficiency is increased.

The utility model provides a kind of vehicle-mounted bicycle fixing frame and its license plate turnover device, wherein the license plate turnover device includes: fixed support, suitable for being installed on fixed frame main body;License plate mounting mechanism has the installation slot for accommodating license plate;Turnover assembly is pivotally connected the fixed support and the license plate mounting mechanism, so that license plate mounting mechanism can be switched between transverse use state and vertical storage state;Positioning element is arranged on turnover assembly, for locking position in transverse state and vertical state;Lock catch device, when transverse state, license plate mounting mechanism is fixed with fixed support.

The utility model discloses a pin seat assembly and a probe station for LED testing, which relate to the technical field of semiconductor detection and comprise an assembly body, a swing part and a probe mounting part. Two first bearing mounting holes which are distributed up and down are formed in the swing part in the vertical direction, a first supporting bearing is arranged in each first bearing mounting hole, and the two first supporting bearings are used for mounting a swing shaft; the swing part is provided with first holding receding grooves corresponding to the first bearing mounting holes, the first holding receding grooves communicate with the corresponding first bearing mounting holes, and the swing part is provided with first locking screws corresponding to the first holding receding grooves in a penetrating mode. The first supporting bearing is tightly fixed in the first bearing mounting hole by tightening the first locking screw, so that zero-clearance positioning between the first supporting bearing and the first bearing mounting hole is realized, the mounting clearance of the first supporting bearing is eliminated to a certain extent, and the positioning precision and stability are improved; and mounting and dismounting of the first supporting bearing and the swing shaft are facilitated.

An automobile screen turnover mechanism comprises a supporting arm, a wheel rod, a spring and a driving piece. The supporting arm is installed in the support, and a containing cavity is formed in the supporting arm. The wheel rods are rotatably installed on the supporting arm, the head ends of the wheel rods slidably extend into the containing cavity and are provided with pressing blocks, the tail ends of the wheel rods are arranged outside the containing cavity and are provided with connecting parts which abut against the supporting arm and are connected with the screen, and the two wheel rods are symmetrically arranged at the two ends of the supporting arm; the springs are arranged on the wheel rods in a sleeving mode and abut against the pressing block and the side wall of the containing cavity. The two springs correspond to the two wheel rods in a one-to-one mode. The driving piece is mounted in the accommodating cavity and is in driving connection with one of the wheel rods; the driving part drives the wheel rod to rotate so as to drive the screen to be overturned and adjusted, and the elastic part can continuously apply pressure to the wheel rod, so that damping is provided for the wheel rod, meanwhile, the mounting gap of the wheel rod is eliminated, and the mounting stability of the wheel rod is improved; the design is low in manufacturing cost, abrasion can be reduced, and the service life can be prolonged.

The utility model relates to the technical field of building construction, and disclose a kind of side-mounted no column stair aluminum alloy glass handrail fixing device. The device adopts modular design, including glass handrail fixed plate, clamping groove, middle decorative cover plate, lower decorative cover plate, U-shaped rubber pad, wedge-shaped rubber strip, and is connected with wall body by expansion bolt to form stable support structure. The device takes aluminum alloy fixed plate as main force component, combines A / B double-piece hollow clamping groove and plum-blossom-shaped expansion bolt layout, realizes the balance of light weight and high strength. The wedge-shaped rubber strip and the self-adapting clamping system formed by U-shaped rubber pad of the device can compensate for glass thickness tolerance and effectively reduce metal collision noise. The device uses welding-free installation process, and is matched with anodized decorative cover plate. It is suitable for various architectural styles, maintenance is more convenient, and safety and aesthetic evaluation are better.

The utility model discloses a side protection turnover mechanism for a heavy-duty tractor, which comprises a fixed support assembly, a rotary support assembly, a turnover connecting piece and a pluggable self-locking fixed pin, the fixed support assembly is of a groove-shaped structure, and rotary shafts are welded at the upper ends and the lower ends of two side walls of the fixed support assembly; the rotating support assembly is of a groove-shaped structure, a rotating groove is formed in the lower end, the bottom is clamped with the rotating shaft through the rotating groove and hinged to the fixed support assembly, and the side face is connected with the side protection through an L-shaped connecting plate. A clamping groove is formed in the back of the overturning connecting piece, and the overturning connecting piece is hooked on the inner side of the upper end of the rotating support assembly through the clamping groove; a mounting hole is formed in the lower part of the turnover connecting piece, and the turnover connecting piece is connected with the rotary bracket assembly through a threaded fastener; a C-shaped opening and an inserting hole are formed in the upper portion of the overturning connecting piece, and the C-shaped opening is matched with a rotating shaft at the upper end of the fixing support assembly; and the pluggable self-locking fixing pin is inserted into an insertion hole above the turnover connecting piece. The turnover / disassembly and assembly operation of the side protection device is simple and convenient, can be completed by a single person with bare hands, and is high in reliability.

The utility model relates to an armrest assembly, which is rotatably arranged on a seat assembly through a rotating shaft, and comprises an armrest framework, a shaft sleeve which is fixed on the armrest framework and is used for coaxially inserting the rotating shaft, and a bolt piece which is used for fixing the rotating shaft and the shaft sleeve along the radial direction. A novel handrail framework installation mode is adopted, the installation strength is guaranteed, the shaking amount is small, assembly and disassembly are convenient, and the appearance of the handrail is not affected.

The application discloses a car lamp structure with cold and warm color light switching function and a car, which comprises a shell, a lamp bead assembly, a reflecting element, an inner lens group and an outer lens arranged in the shell in sequence along a light path transmission direction; wherein the lamp bead assembly comprises multiple lamp bead groups; the reflecting element adopts a condenser; the inner lens group is arranged in one-to-one correspondence with the lamp bead group, each inner lens group has a plane facing the light entrance surface of the reflecting element and a plurality of convex arc surfaces facing the light exit surface of the outer lens, and the ratio of the size b of each inner lens group in the left-right direction to the size a in the front-rear direction ranges from 2 to 24; the outer lens is arranged on the end surface of the shell; the application can compress the size of the inner lens in the light path direction, directly reduce the transmission distance of light from the reflecting element to the outer lens, and allow the inner lens group to be arranged in parallel and compact in the left-right direction, thereby avoiding the redundant space caused by the circular or square lens in the traditional design.

The present invention relates to an installation mechanism for T-shaped profiles. The semi-gantry structure is provided with a main beam, and two movable T-shaped installation mechanisms are provided on the main beam; the T-shaped installation mechanism includes a walking trolley and a middle column pressing mechanism connected to the walking trolley, a rotating mechanism is provided between the walking trolley and the middle column pressing mechanism, a rotating arm is connected to the rotating mechanism, and a supporting platform and an electromagnetic lifting mechanism matched with the rotating arm are provided on the middle column pressing mechanism, the rotating arm and the supporting platform are vertically arranged, and electric hoists for grabbing the T-shaped profiles are respectively provided at both ends of the rotating arm. When in use, the automatic grabbing, positioning, installation, pressing of the T-shaped profiles and the adsorption of the installed steel plates can be realized, the installation accuracy of the T-shaped profiles can be improved, and various specifications of T-shaped profiles can be adapted to be installed at any specified position. It has a high degree of automation and intelligence, effectively improves the positioning and assembly efficiency, greatly reduces the labor intensity of the staff, and improves the production efficiency.

The utility model discloses a radiator main leaf which comprises a main leaf body, mounting holes are formed in the two ends of the main leaf body, a fin is fixedly welded to the surface of one side of the main leaf body, bent strips are arranged at the two ends of the fin, the bent strips are fixedly welded to the surface of the main leaf body, and a welding structure is arranged on one side of each bent strip. Supporting structures are arranged on the two sides of the main piece, each welding structure comprises a welding groove and a welding convex point, the welding convex points are fixedly welded in the welding grooves, the welding grooves are of spherical opening structures, the welding grooves are evenly distributed in the surfaces of the two sides of the main piece, one sides of the welding convex points are fixedly welded to the surfaces of the bending strips, and the other sides of the welding convex points are fixedly welded to the surfaces of the bending strips. According to the scheme, the fins with the bent strips are welded through the main piece, the contact area can be increased, welding can be stable by combining a welding structure and a supporting structure, supporting and jacking can be achieved during installation, looseness caused by installation gaps is avoided, and the heat exchanger is safe, stable and beneficial to use.

The utility model discloses a thickness self-adaptive clamping device of an electronic book page turner, which relates to the technical field of electronic book page turning and comprises a host machine, the host machine comprises an upper clamping main body, the upper clamping main body comprises a clamping support, a movable cavity is arranged at the bottom of the front end of the clamping support, and the movable cavity is communicated with the clamping support. And an upper hemispherical space is formed in the upper bottom of the movable cavity. The upper clamping main body and the lower clamping main body are connected through the rotating shaft and can mutually rotate around the rotating shaft, so that the variable opening and closing space height between the upper clamping main body and the lower clamping main body is formed, and in the change, power is provided by the coil spring; the angle of the clamping assembly in the movable cavity of the upper clamping body is corrected so as to adapt to screens of electronic books, mobile phones, tablet personal computers and other digital products with different thicknesses in a matched mode, continuous clamping force is provided, stability is kept, the use scenes of the products are effectively increased, and meanwhile the use experience feeling is enhanced.

The invention provides a crankshaft heat treatment out-of-tolerance control device and a crankshaft heat treatment out-of-tolerance control method, relates to the field of constraint tools, and aims to solve the technical problem of insufficient subsequent machining allowance or direct scrapping caused by difficult-to-control deformation of a crankshaft in the length direction in the vertical hanging heat treatment process at present. The first restraining tool is provided with a restraining hole for the crank arm to stretch in, and is matched with a wedge block for use, so that the trend that the crank arm expands outwards under the action of gravity is limited, the distance between the crank arms is locked in the heat treatment process, and the crank arms are prevented from being lengthened due to self weight; the second constraint tool is provided with a constraint block extending between the crank arms, the constraint block is arranged on the inner sides of the crank arms, and the stress of inward collapse or closing of the crank arms is resisted in the cooling shrinkage process, so that the length of the crankshaft is prevented from being shortened; the first restraining tool and the second restraining tool are inserted into the restraining grooves through the wedge blocks at the wedge-shaped ends to abut against the end face of the crank arm, and the wedge-shaped matching structure solves the problem of tolerance matching between the tools and the roughly machined crankshaft.

The high-precision injection pump comprises a shell, a needle cylinder limiting mechanism, a push rod and a push rod driving mechanism, the needle cylinder limiting mechanism comprises a limiting sunken part and a limiting shifting block, a first inserting groove matched with a skirt edge of a needle cylinder in an inserting mode is formed in the end of the limiting sunken part, and an elastic pressing block and a pressing mechanism which are used for eliminating a gap between the limiting shifting block and the needle cylinder are additionally arranged on the limiting shifting block. The first slot is additionally provided with a pressing mechanism for eliminating a gap with a needle cylinder skirt, and the push rod is additionally provided with a limiting rod, a knob and a clutch mechanism for eliminating a gap with a piston handle. By adopting the scheme, the utility model provides the high-precision injection pump which can improve the installation reliability of the injector by eliminating the installation gap so as to ensure the accuracy of the injection dosage.

The utility model discloses an electromagnetic encoder, comprising an electromagnetic encoder body, the electromagnetic encoder body is provided with a disc, the disc is provided with a fixing assembly, the fixing assembly comprises a rectangular plate fixedly connected with the disc, the rectangular plate is provided with a slot, and two sides of the rectangular plate are respectively provided with a row of spacing holes communicated with the slot. The fixing assembly comprises a bent plate, an inserting block is arranged on one side of the bent plate, a pair of second springs is arranged on the inserting block, and limiting rods are fixedly connected to one ends of the pair of second springs. The position of the bending plate can be finely adjusted according to actual requirements in the installation process of the electromagnetic encoder body, the installation flexibility is greatly improved, the electromagnetic encoder body can adapt to more mechanical equipment of different models and specifications, the installation steps are simplified, and the installation difficulty is reduced.

This utility model discloses an integrated liner plate and a hopper for pellet production, relating to the technical field of pellet production equipment. It includes multiple liner plate components arranged circumferentially. Each liner plate component comprises a first arc plate portion, a second arc plate portion, and a transition plate portion. The first arc plate portion is installed on the inner side of the vertical section of the hopper, and the second arc plate portion is installed on the inner side of the conical section adjacent to the vertical section. The angle between the second arc plate portion and the first arc plate portion is the angle formed by the inner sides of the vertical section and the conical section. The transition plate portion smoothly connects one axial end of the first arc plate portion and one axial end of the second arc plate portion. The transition plate portion of the multiple liner plates arranged in a circumferential pattern eliminates the installation gap at the junction of the vertical section and the conical section, increases the material flowability at this location, solves the previous problem of material sticking, and ensures the stability and continuity of material discharge from the hopper.

The invention provides a dynamic loading test device for a solid rocket engine shell and an unbalance loading protection method. The dynamic loading test device comprises a stress application cap, a plurality of connecting pull rods, a pressurizing assembly, a test platform and a dynamic loading and unbalance loading multi-channel coordination control system. The pressurizing assemblies are vertically connected with the stress application cap through the connecting pull rods; the multiple pressurizing assemblies are composed of unbalance loading protection assemblies and hydraulic actuators. And the dynamic loading and unbalance loading multi-channel coordination control system is electrically connected with the hydraulic actuator. A mounting gap between the upper surface of the stress application cap and the connecting pull rod is eliminated by adjusting the strokes of the unbalance loading protection assemblies; and a dynamic loading and unbalance loading multi-channel coordination control system is used for controlling multiple groups of hydraulic actuators. According to the invention, the unbalance loading phenomenon possibly generated during the dynamic loading test is solved, the mounting gap between the connecting pull rod and the stress application cap is eliminated, the stress application cap is enabled to apply uniform force to the test piece, and the unbalance loading problem is not generated under the condition that the load is rapidly increased.

This utility model discloses a car seat that can be used as a bed, including a base, on which a seat frame assembly is disposed. The seat frame assembly can be rotated forward to a horizontal position with its front end as the pivot point. A backrest assembly is installed at the rear end of the base, and the backrest assembly can be reclined forward to a horizontal position. The backrest assembly includes a front backrest and a rear backrest. When the backrest assembly is reclined forward to a horizontal position, the rear backrest can be rotated backward relative to the front backrest to a horizontal position. The beneficial effect of this utility model is that it can easily realize the conversion of the seat from a sitting position to a reclining position.

The utility model provides an electrical panel device with a quick disassembly and assembly structure, and belongs to the technical field of electrical panel installation. The problems that a traditional electrical panel device is low in disassembly and assembly efficiency, parts are prone to being lost, and installation stability is poor are solved. The device comprises an electrical housing, a connection panel, a clamping assembly and a positioning assembly. The connecting panel is detachably connected to the top surface of the electrical shell through a clamping assembly; limiting grooves are formed in the two sides of the electrical shell, and the positioning assemblies are arranged in the limiting grooves. The clamping assembly comprises a connecting frame and a connecting rod, the connecting frame penetrates through the connecting panel and extends into the electrical shell, and the connecting rod is connected into the connecting frame; a sliding groove is formed in the bottom of the connecting frame, a connecting lantern ring is arranged at the bottom of the connecting rod, two connecting blocks are symmetrically arranged on the outer side of the connecting lantern ring, and the other sides of the two connecting blocks are hinged to an arc-shaped plate. The quick dismounting device is mainly used for quick dismounting of the electrical panel.

The present invention relates to an installation mechanism for T-shaped profiles. The semi-gantry structure is provided with a main beam, and two movable T-shaped installation mechanisms are provided on the main beam; the T-shaped installation mechanism includes a walking trolley and a middle column pressing mechanism connected to the walking trolley, a rotating mechanism is provided between the walking trolley and the middle column pressing mechanism, a rotating arm is connected to the rotating mechanism, and a supporting platform and an electromagnetic lifting mechanism matched with the rotating arm are provided on the middle column pressing mechanism, the rotating arm and the supporting platform are vertically arranged, and electric hoists for grabbing the T-shaped profiles are respectively provided at both ends of the rotating arm. When in use, the automatic grabbing, positioning, installation, pressing of the T-shaped profiles and the adsorption of the installed steel plates can be realized, the installation accuracy of the T-shaped profiles can be improved, and various specifications of T-shaped profiles can be adapted to be installed at any specified position. It has a high degree of automation and intelligence, effectively improves the positioning and assembly efficiency, greatly reduces the labor intensity of the staff, and improves the production efficiency.