60results about How to "Won't spring back" patented technology

The invention relates to a processing technology of a large-radian arc-shaped spring. The processing technology is characterized by comprising the following procedures of: spring coiling: primary stress relief annealing; spring grinding; spring bending into an arc-shaped spring; secondary stress relief annealing; shot blasting; hot-strong pressing; sorting; angular rigidity and torque test; fatigue life test; and surface antirust treatment. According to the forming technology of the arc-shaped spring provided by the invention, the arc-shaped spring with the free angle of being more than 45 degrees can be effectively formed, the thermal relaxation rate of the spring is less than 2%, the instantaneous torque is large, the fatigue life is 1 million times, and the technical problems of low finished product rate and incapability for normal use of the large-radian arc-shaped spring in the prior art are solved.

The invention discloses a thread core-pulling rivet and a riveting method using the same. The thread core-pulling rivet comprises a rivet rod with a limiting cap, a driving ring mounted on the rivet rod in a threaded mode and a rivet sleeve arranged on the rivet rod in a sleeving mode and located between the limiting cap and the driving ring. A blocking head matched with the limiting cap in an abutting mode is arranged at one end of the rivet sleeve, and the other end of the rivet sleeve and the driving ring are matched circumferentially in a positioned mode. In riveting, the rivet rod rotatesrelative to the rivet sleeve, the driving ring and the limiting cap apply force to the rivet sleeve oppositely to enable the rivet sleeve to be deformed, and after riveting, a deformed part of the rivet sleeve and the blocking head abut against the two sides of a riveting part. The thread core-pulling rivet has high pre-tightening force, tensile strength and fatigue strength after being mounted and is easy to assemble, so that the manufacturing difficulty and cost are reduced.

The invention discloses a threading construction auxiliary device for electrical engineering. The threading construction auxiliary device comprises a vehicle body, wherein a working cavity is formed in the vehicle body; the right side wall of the working cavity is connected with a wire arrangement hole penetrating through the vehicle body; a wire releasing guide device is arranged in the wire arrangement hole; a connecting cavity is formed in the rear side wall of the working cavity; and a spline sleeve is rotationally mounted on a wall body between the connecting cavity and the working cavity. According to the device, a transmission shaft is matched with a one-way bevel gear, so that a pressing block only works when the transmission shaft rotates forwards, a cable is fixed, the cable is prevented from rebounding when the transmission shaft rotates reversely, and normal operation is guaranteed; and when the transmission shaft rotates reversely, a pawl rack drives a ratchet wheel to enable a material disc to rotate, the material disc rotates to release the cable, and the working efficiency is improved.

The invention relates to a machining process for an arc spring. The machining process for the arc spring is characterized by comprising the following working procedures of spring coiling, first-time stress relieving, spring grinding, bending for the arc spring, second-time stress relieving, shot blasting, hot stressing, sorting, angle rigidity and torque testing, fatigue life testing and surface rust-proof treatment. The forming process of the arc spring is provided, and by means of the forming process, the arc spring with the free angle larger than 45 degrees can be effectively formed, it isguaranteed that the hot relaxation rate of the spring is smaller than 2 %, the instantaneous torque is large, and the fatigue life is one million times or above; and the technical problems that in theprior art, the yield of the large-angle arc spring is low, and the large-angle arc spring cannot be normally used are solved.

The invention relates to the technical field of medical instruments, and discloses a press-holding system and a press-holding method. The press-holding system comprises a valve press-holding machine,a handheld press-holding device, a conveyor, press-holding sponge and a press-holding film, wherein the valve press-holding machine is used for performing first-stage press-holding on a valve, and thehandheld press-holding device is used for performing second-stage press-holding on the valve; the press-holding sponge is used during first-stage press-holding, and adopts a cylindrical structure, and the valve is arranged in the press-holding sponge in a penetrating manner; and the press-holding film is used during second-stage press-holding, and adopts a cylindrical structure, the valve is arranged in the press-holding film in a penetrating manner after the first-stage press-holding is finished, and the handheld press-holding device is provided with a self-locking structure. According to the press-holding method, the valve press-holding machine is used for performing first-stage press-holding on the valve, and the handheld press-holding device is used for performing second-stage press-holding on the valve. The valve can be effectively prevented from being broken in the press-holding process, and the valve is prevented from rebounding after being pressed and held.

The invention, which belongs to the technical field of test tooling, in particular relates to an accurate measuring device for the angular rigidity of an aero-engine clamp. The accurate measuring device comprises a base, a torque loading device, a torque sensor, a loading head and a clamp mounting seat; and the torque loading device and the clamp mounting seat are disposed on the base. The torqueloading device includes an output shaft, a worm, a worm wheel, and a hand wheel; the hand wheel is arranged on the worm and the worm wheel is arranged on the output shaft; the worm wheel and the wormare mutually meshed; and the two ends of the torque sensor are respectively connected with the loading head and the output shaft. According to the accurate measuring device, the torque loading deviceapplies forces to the clamp and loading is realized based on the worm wheel and the worm, so that the large-angle rotation of the operating head is ensured and small-angle deflection of the clamp is realized; the operation becomes convenient; the worm wheel and the worm can be locked by themselves; and no rebounding is caused during the loading process. And thus the running distance of the loadingrod is controlled precisely.

The invention relates to a formaldehyde elimination agent and a preparation method thereof as well as an adhesive, a wooden product and an artificial board. The formaldehyde elimination agent comprises the following ingredients in parts by weight: 64-92.9 parts of pure water, 5-20 parts of urea, 2-15 parts of hydrazide compound and 0.1-1 part of an anionic surfactant. The formaldehyde elimination agent can be added into the adhesive and can be also sprayed on the wooden product and the artificial board. The formaldehyde elimination agent has the benefits as follows: on the basis of reaction between urea and formaldehyde, the hydrazide compound is added, so that the technical effect of no reverse reaction after reaction is realized; since the anionic surfactant is added, the reaction between effective ingredients in the product and formaldehyde in the artificial board is reinforced; the pH of the formaldehyde elimination agent is 7-9, the color of the wood material is not changed after the formaldehyde elimination agent is sprayed on the wood material with a light color, and the contents of formaldehyde in the adhesive, the artificial board and the wooden product reach the national compulsorily-executed health standard level.

The invention discloses a composite material with a holographic anti-counterfeiting effect and a manufacturing method thereof. The composite material comprises a holographic layer, a medium plating layer and a protective layer, wherein the holographic layer comprises a supporting layer and a holographic anti-counterfeiting micro-nano structure formed on the surface of the supporting layer; the transparent medium plating layer is formed on the holographic layer and covers the holographic anti-counterfeiting micro-nano structure; the protective layer is formed on the transparent medium plating layer; and the protective layer is formed by curing a UV curing coating layer and/or a thermosetting coating layer. In order to overcome the defects in the prior art and solve the problems in the prior art, the invention provides the composite material with higher physical strength and the holographic anti-counterfeiting effect and the manufacturing method thereof. The composite material is high in wear resistance and bending resistance, relatively high in anti-counterfeiting technical content level, significant in optical effect, easy to quickly identify the authenticity, and stable in product quality in long-term use. Meanwhile, the composite material with the holographic anti-counterfeiting effect is not prone to imitation, and not prone to information tampering.

The invention discloses a straightening device for aluminum profile machining, and belongs to the technical field of aluminum profile machining. The straightening device for aluminum profile machining comprises a workbench, a straightening box and a mounting box, wherein the straightening box is fixedly installed on the upper surface of the workbench; the mounting box is fixedly installed on the upper surface of the straightening box; a motor is fixedly installed on the upper surface of the mounting box; a liquid cooling tank is fixedly installed on the front end face of the mounting box; a distribution box and a control box are fixedly installed on the upper surface of the workbench; an electromagnetic heating coil is fixedly installed on the rear end face in the straightening box; and a straightening bin is fixedly installed on the lower surface in the straightening box. According to the straightening device for aluminum profile machining provided by the invention, by arranging the electromagnetic heating coil, an aluminum profile is heated before being straightened, so that the aluminum profile is softened to a certain degree, the elasticity of the aluminum profile is damaged, the straightened aluminum profile does not rebound, multiple sets of straightening rollers do not need to be arranged for continuous extrusion, the straightening effect is better, and meanwhile, the occupied area is smaller.

The invention relates to an automatic box-opening and bottom-sealing machine, and belongs to the field of mechanical equipment. The equipment comprises a storage feeding device, a bottom-closing pushing device, a bottom-sealing discharging device and an equipment rack, the storage feeding device comprises a bracket assembly and a feeding assembly, the bracket assembly is matched with the feeding assembly, the bottom-closing pushing device comprises a bottom-closing assembly and a pushing assembly, the bottom-closing assembly is matched with the pushing assembly, the bottom-sealing dischargingdevice comprises a conveying assembly and a bottom-sealing assembly, and the conveying assembly is matched with the bottom-sealing assembly. The automatic box-opening and bottom-sealing machine can replace manual operation to seal the bottom of a paper box, the investment of labor cost is reduced, and the working efficiency is improved.

The invention relates to a multifunctional pot cover. A fixed cover of the multifunctional pot cover is fixed to an opening of a pot body, a sealing opening structure corresponding to the fixed coverin shape is arranged on the fixed cover, the back side of a movable pot cover is connected with the upper portion of the back side of the fixed cover through a connecting mechanism, a lock catch structure is arranged on the front side of the fixed cover, a fixing block is arranged on the front side of the movable pot cover, a bouncing mechanism is arranged in a support on the back side of the fixed cover, and a clamping block is arranged on the back side of the movable pot cover. The multifunctional pot cover is fixed to the corresponding pot body, can be used together with the pot body and can also be used in cooperation with various pot bodies, the pot cover is provided with an external lock catch, the bouncing mechanism is arranged inside, a rubber cover is completely closed due to thefact that the lock catch device is arranged outsides, the sealing degree is high, the pot cover overall structure is a rectangular structure, the bottom can be provided with a traditional cylindricalpot body or pot bodies of other structures, in the transporting process, contact faces between the pot covers are planes, and therefore swing is not prone to occurrence.

An external self-locking structure of a connector is disclosed. A housing connecting sleeve with an engaging groove sleeves the outer side of the housing, and a hanging pin groove is arrange on the connecting sleeve of the case to match with the hanging pin on the case so as to limit the circumferential position of the connecting sleeve of the case, the engagement groove of the housing connectingsleeve and the engagement teeth on the screw sleeve are engaged and locked, pressure is applied by means of a spring, so as to ensure the meshing stability of the housing connecting sleeve and the screw sleeve, Screw down the threaded sleeve, After tightening, and then pushing the hanging pin on the connector housing into the hanging pin slot through the spring in the housing, The sawtooth are fully engaged with the locked design, ensuring good contact of the inner center contact, After the external connection is locked, the sawtooth meshes tightly in the high-frequency vibration process, andthe hanging pin does not spring back in the hanging pin groove. The device has the advantages of simple structure, simple and convenient installation, saves installation space, and solves the problemof instantaneous breakage of microwave signal caused by poor internal contact caused by loose screw thread in the high-frequency vibration process.

The invention discloses a circuit breaker gas-taking auxiliary device. The device comprises a rack, the rack is provided with a press block capable of sliding up and down along the rack, a cushion block matched with the press block is fixedly arranged on the bottom end of the rack, the top end of the rack is provided with a rotatable cam, when the cam rotates, the contour line of the cam is contacted with the press block and the cam drives the press block to slide up and down along the rack. The device disclosed by the invention has the advantages of being simple in structure, convenient and fast in operation and good in clamping effect.

The invention relates to the technical field of cabling machines, and provides a cabling machine for cable production, which comprises a machine body, and a cable core discharging device, a branching discharging device, a doubling device, a skin winding device, a heat sealing device and a take-up device which are sequentially arranged on the machine body along the movement direction of a cable core, the doubling device comprises a disc body and a sliding sleeve, the disc body is rotationally arranged on the machine body, and the sliding sleeve is arranged on the disc body. A first through hole and a plurality of second through holes are formed in the disc body, the cable core penetrates through the first through hole, the wire core penetrates through the second through holes, the sliding sleeves are slidably arranged in the first through hole and the second through holes respectively, each sliding sleeve is provided with a sliding cavity, the cable core and the wire core penetrate through the sliding cavity, each sliding sleeve is provided with a one-way part, and the one-way parts are located in the sliding cavities. And each one-way part is in contact with the wire core or the cable core and prevents the wire core or the cable core from rebounding. By means of the technical scheme, the problem that in the prior art, after cables are collected, the cables can rebound due to tensioning force is solved.

The invention discloses an automobile interior trim part arranging shelf and relates to the field of automobile interior trim parts. The automobile interior trim part arranging shelf comprises an arranging cabinet and a support rack, wherein the corners of the arranging cabinet are provided with the support rack, and the lower end of the support rack is provided with walking wheels; the arrangingcabinet is provided with a plurality of cabinet units; one side wall of the opening of every cabinet unit is provided with a fixed rod to which a moving rod is hinged, the front end of the moving rodis provided with a lapping plate, the lower end of the lapping plate is provided with a lower protrusion and a lower hemispherical groove, the upper end surface of the moving rod is provided with an upper protrusion, the side wall of the cabinet unit which is opposite to the fixed rod is fixedly provided with a lower positioning plate, the upper end surface of the lower positioning plate is provided with a positioning hemispherical groove and a positioning protrusion, the side wall of the cabinet unit where the fixed rod is arranged is fixedly provided with a side positioning plate, the edge of the side positioning plate is provided with a side hemispherical groove, the upper protrusion and the lower hemispherical groove are matched with the positioning hemispherical groove and the positioning protrusion respectively, and the upper protrusion is matched with the side hemispherical groove. The automobile interior trim part arranging shelf is simple in structure, integrally light, easy to mount, flexible in movement and capable of being applied to placing various automobile interior trim parts and related accessories.

The invention discloses an adjustable mobile clothes hanger for household, Including a clothes hanger base, the bottom surface of the clothes hanger base is fixedly connected with a moving universal wheel, the top surface of the clothes hanger base is fixedly connected with an adjustable clothes hanger, the adjustable hanger includes a hanger telescopic sleeve, the inner wall of the clothes hangertelescopic sleeve is movably connected with a clothes hanger U-shaped pipe, the inner wall of the clothes hanger U-shaped pipe is movably connected with a spring expansion and contraction block, thebottom surface of the spring expansion block is fixedly connected with an expansion spring, the bottom end of the expansion spring is fixedly connected with the top surface of the coat hanger base, the top surface of the spring expansion block is fixedly connected with an adjustment rope fixing block, and the surface of the adjustment rope fixing block is provided with an adjustment rope fixing hole. The adjustable mobile clothes hanger for household use achieves the effect of conveniently adjusting the height of the mobile clothes hanger by means of the adjusting rod, the adjusting rope, theadjusting rope fixing rod, the n adjusting rope fixing block, the expansion spring and the clothes hanger telescopic sleeve.

The invention relates to the technical field of buffer devices, and discloses a sliding door safety protection device based on the principle of centrifugal rotation, which includes a door body, a door frame is cut above the door body, and a pull rope is fixedly connected to the bottom of the slider. The bottom of the tension rope is fixedly connected with a handle, the corner of the door frame is provided with a buffer box, the interior of the buffer box is provided with a rotating shaft, the outer side of the rotating shaft is fixedly connected with a gear, and the teeth of the gear A fixed card is rotatably connected to the buffer box, a fixed block is arranged on the inner wall of the buffer box, and an elastic band surrounds the outer side of the rotating shaft. This kind of sliding door safety protection device based on the principle of centrifugal rotation, by setting a fixed card, a fixed block and an elastic belt in the buffer box, using the action of centrifugal force, the buffer device is stopped when the door is slowly pushed and pulled, reducing the slow push and pull. When pushing and pulling the door body quickly, open the buffer device to prevent accidental pinching.

The invention provides a clamp, and relates to the technical field of electronic device testing. The clamp comprises a rack, a pressing part and a driving assembly. The pressing part is in sliding connection with the rack; and the driving assembly comprises a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are hinged to form a first hinge point, and meanwhile the two ends of the first connecting piece and the two ends of the second connecting piece are hinged to the rack and the pressing part to form a second hinge point and a third hinge point respectively. The first hinge point, the second hinge point and the third hinge point have a collinear state and a non-collinear state under the action of external force, and the three points can drive the pressing part to do linear motion so as to press or loosen a piece to be clamped in the switching process of the two states. Through the clamp, the technical problem that the accuracy of the electrical performance index of an isolator cannot be ensured by manually pressing the isolator and a test frame in the prior art is solved, and the effect of improving the debugging efficiency and the accuracy of the electrical performance index is achieved.

The invention relates to a light anti-seismic floor slab connecting joint and a using method thereof. The light anti-seismic floor slab connecting joint comprises floor slab bodies and a concrete pre-embedded block, wherein connecting boxes are fixedly connected to the two sides of each floor slab body correspondingly, second mounting grooves are formed in the sides, away from each other, of every two connecting boxes correspondingly, a connecting assembly used for connecting the two floor slab bodies is arranged in each second mounting groove, connecting holes and first mounting grooves are formed in the concrete pre-embedded block, the connecting holes communicate with the first mounting grooves, fixing assemblies used for fixing the connecting assemblies are arranged in the first mounting grooves, and Z-shaped grooves are formed in the two sides of the concrete pre-embedded block correspondingly; limiting assemblies used for limiting the fixing assemblies are arranged in Z-shaped grooves, fixing blocks are fixedly connected to the two sides of the concrete pre-embedded block correspondingly, and the problems that the mounting process of the floor slab connecting joint is too tedious, the mounting stability is poor, the workload of workers is increased, and the working efficiency is further reduced in the prior art are solved.