39results about How to "Prevent mutual sliding" patented technology

The invention provides a clamping device which comprises an upper clamping piece and a lower clamping piece .The upper clamping piece comprises an upper clamping piece body, upper clamping piece through holes are formed in the upper clamping piece body in the thickness direction, and one side face of the upper clamping piece body is provided with dovetail tenons; the lower clamping piece comprises a lower clamping piece body and a testing machine clamping part which is used for being clamped in an external testing machine, the lower clamping piece body further comprises a lower clamping piece body base part and a lower clamping piece body protruding part, lower clamping piece through holes are formed in the lower clamping piece body base part in the thickness direction, the lower clamping piece body protruding part is provided with dovetail mortises, and the depth of each dovetail mortise is equal to the height difference; the dovetail tenons can be aligned with the dovetail mortises, at the moment, the upper clamping piece through holes can be aligned with the lower clamping piece through holes .The clamping device has the advantages of being compact in structure and accurate in positioning .The invention further provides a corresponding clamping method, and the clamping stability and accuracy of a test piece to be tested are greatly improved.

The invention discloses a general flexible in-ear hearing aid. The general flexible in-ear hearing aid comprises a front part, a middle part and a back part of a hearing aid, wherein the front part of the hearing aid further comprises a loudspeaker; the back part of the hearing aid comprises a machine body; the middle part of the hearing aid comprises a sound transmitting device; the sound transmitting device is a flexible or soft connecting device; one end of the soft connecting device is connected to the front part of the hearing aid, and the other end of the soft connecting device is connected to the back part of the hearing aid. The in-ear hearing aid provided by the invention can be placed in an ear completely; the hiding performance is strong; the hearing aid is always elastically contacted with an ear canal and is worn comfortably and stably; the front part can be placed in a deep canal close to human eardrum; air in the ear is circulated when the hearing aid is worn; and the ear is not easily to sweet after wearing the hearing aid for a long time; the feedback and occlusion effects are effectively reduced; the transmitted sound is clear; the gain loss is small; and the general flexible in-ear hearing aid is suitable for being used by any patient with hearing impairment.

The invention discloses a screw-type vertical elevator and a working method thereof, and relates to the technical field of transportation. The screw-type vertical elevator comprises a well, a lift carand a driving mechanism. The driving mechanism comprises a motor, a transmission rod and a plurality of screws. The multiple screws are vertically arranged on the periphery of the lift car, and eachscrew is provided with a nut in a sleeved mode. The nuts are connected to the lift car through first connecting pieces, and each screw is provided with a second gear. An output shaft of the motor is provided with a worm, a worm wheel engaged with the worm is arranged at the upper end of the transmission rod, and a first gear engaged with all the second gears is arranged at the lower end of the transmission rod. The screw-type vertical elevator has the beneficial effects that the lift car lifting action is achieved in a spiral transmission mode of the screws and the nuts, the certain self-locking function is achieved, labor is saved, and the falling accident is prevented from being caused on the lift car; the driving mechanism has the self-locking function through design of the worm and theworm wheel, and controllability and safety of the screw-type vertical elevator are ensured; and through design of the second gears and the first gear, synchronous rotation of the four screws can be ensured, and thus ascending and descending of the lift car are more stable.

The invention discloses a novel tubeless pneumatic tire without sidewall supporting. Part of the inner surfaces of beads of the tire, and / or the inner surfaces of sidewalls, and / or the inner surfacesof shoulders are provided with wear-resistant layers and / or wear-resistant lubricating layers. After the zero-pressure tire is flattened, two inner surfaces of the inner layer of the tire are in contact with each other; the wear-resistant layers are arranged at the contact position so as to improve the wear resistance and increase the driving mileage and driving speed of the tire; the wear-resistant lubricating layers are arranged at the contact position so as to reduce the friction coefficient of a contact surface, reduce the friction and reduce the risk of detachment of the tire; the reduction of the friction can improve the wear resistance and increase the driving mileage of the tire; the reduction of the friction is capable of reducing the rolling resistance of the tire, reducing the situation of unbalanced stress on wheels on two sides, and improving the handling of a vehicle; and in the contact position, when a tread slides towards one of the shoulders, two steeply-sloped side surfaces of a protrusion structure on the side adjacent to the corresponding shoulder are in contact with each other so as to prevent the tread from sliding towards the corresponding shoulder and improve the handling of the vehicle.

The invention relates to the field of logistics, and particularly discloses a portable vehicle-mounted refrigerator for logistics. The portable vehicle-mounted refrigerator for logistics comprises anouter box body, a sealing cover, a hinge, an inner box body and ice boxes, wherein the bottom of the inner box body is arranged on a horizontal supporting plate; vertical connecting inserting plates are fixed on the left end and right end of the supporting plate; inserting grooves matched with the connecting inserting plates are formed in the positions, corresponding to the connecting inserting plates, on the outer walls of the inner box body; a horizontal sliding rail is fixedly mounted on the bottom of the supporting plate; two sliding seats which are symmetrical left and right are slidablymounted on the sliding rail; the two sliding seats are both connected with supporting connecting rods through rotating shafts; two sliding sleeves are respectively and rotatably connected with the ends of the two supporting connecting rods through second pin shafts; and supporting springs sleeving a supporting sliding rod are fixedly connected to the sliding sleeves. According to the portable vehicle-mounted refrigerator for logistics, the supporting springs play a role of supporting and buffering at the bottom of the inner box body, so that the vibration to the inner box body in the transportation process is reduced, and internal goods are protected.

The invention relates to the field of power transmission line maintenance equipment, particularly to a single-end hand-cranking tightening assembling clamp, which is used in cooperation with a currentguide plate, wherein the current guide plate is provided with a mounting hole. The single-end hand-cranking tightening assembling clamp comprises a positioning rod and a pressing block, wherein the positioning rod can penetrate through the mounting hole, a limiting piece is arranged at one end of the positioning rod, the width between the two opposite ends of the limiting piece is larger than thehole diameter of the mounting hole, the pressing block is arranged on the positioning rod and can move relative to the positioning rod so as to clamp the current guide plate between the pressing block and the limiting piece, one fixing bolt of the current guide plate is taken down, the positioning rod is inserted into the mounting hole, the two current guide plates are fixed by the positioning rod, and fixing bolts are in an unstressed state or a relatively small stressed state, so that the remaining fixing bolts are convenient to disassemble, and the condition that after the two current guide plates are completely separated, the two current guide plates are difficult to draw close and the installation holes of the two current guide plates are aligned due to tension of a power transmission line so as not to reset can be overcome.

The invention discloses a universal hinge in-the-ear hearing aid, which comprises a front part, a middle part and a back part of the hearing aid, wherein the front part of the hearing aid comprises a loudspeaker; the back part of the hearing aid comprises a machine body; the middle part of the hearing aid comprises a sound conduction device; the sound conduction device is a hinge connection device; one end of the hinge connection device is connected with the front part of the hearing aid and the other end of the hinge connection device is connected with the back part of the hearing aid; the rotation angle of the hinge connection device can be freely controlled; and the rotation elevation angle is up to 60 degrees, so the requirement of the human auditory meatus corner is met. The in-the-ear hearing aid provided by the invention can be completely placed in the ear, has strong stealthiness and keeps elastic contact with the auditory meatus; the front part of the hearing aid can be placed in the deep auditory meatus close to the human eardrum; the in-the-ear hearing aid is comfortably and steadily worn; when the hearing aid is worn, the air in the ear is ventilated so that the wearer is not easy to sweat after wearing for a long term; the universal hinge in-the-ear hearing aid can effectively reduce feedback and occlusion effects; the conducted sound is clear; the gain loss is reduced; therefore, the universal hinge in-the-ear hearing aid is flexible and suitable for all patients suffering from hearing impairment.

The invention relates to a novel three point bending test device for a rock sample, which belongs to test equipment. The test device is formed by a base, supports, rolling shafts and adjusting bolts, wherein the supports of the test device are in a rectangular shape; rolling shaft positioning grooves are arranged above the supports; the adjusting bolts are located in guide holes of the base and are arranged in bolt holes in bosses of the supports in a rotating way; a space between the supports can be adjusted through rotating the adjusting bolts, and the offset of the supports can be avoided; and meanwhile, scale marks are marked on the surface of the base, so that the supports can be positioned according to the size of the rock sample. The rolling shafts of the supports are fixedly arranged in the rolling shaft positioning grooves of the supports through springs, so that friction between the rock sample and the supports can be reduced, mutual sliding of the rock sample and the rolling shafts is prevented, and the measured value is more accurate. According to the test device, the deformation and the conversion between signals in a traditional method are changed, the real-time monitoring on a three point bending test of the rock sample is realized, the intuitiveness is strong, the structure is reasonable, the operation is flexible and simple, the effect is good, and the disassembly is convenient.

The invention discloses an anti-slip cable saddle structure for suspension bridges. The anti-slip cable saddle structure comprises a saddle. The bottom of a trough of the saddle is provided with at least one longitudinal partition parallel to trough walls. At least one discontinuous clamp plate layer is arranged between each two adjacent longitudinal partitions or between each longitudinal partition and the corresponding trough wall. Each discontinuous clamp plate layer is formed by linking at least four tangential clamp plates in the longitudinal direction. Besides the bottom of the trough and the sidewalls all providing effective friction, the added tangential clamp plates and longitudinal partitions provide effective friction, so that slip resistance is greatly improved; slipping between a main cable and the trough can be prevented; an effective solution is provided for cable saddle structures of small side- and middle-span ratio suspension bridges or multi-pylon multi-span suspension bridges, and overall rigidity, wind resistance and bearing capacity of the bridges are improved.

The invention provides a cover component of a top-pressing elevator weight block. The cover component of the top-pressing elevator weight block comprises a cover component body in a semi-rectangular shape as a whole. The cover component body is held on the outer of a U-shaped counterweight beam, and locked. The cover component body includes an outer locking block in the semi-rectangular shape and two inner locking blocks in the semi-rectangular shape which are correspondingly connected to the inside of both sides of the outer locking block. The two inner locking blocks are located on the U-shaped opening side of the counterweight beam and the outer locking block is located on the opposite side of the U-shaped opening side of the counterweight beam. The outer locking block and the inner locking blocks are locked through a first bolt locking assembly. The two inner locking blocks are correspondingly sandwiched outside of both side ends of the U-shaped opening side of the counterweight beam. Top pressing members are correspondingly arranged on the two inner locking blocks, and are pressed against inner walls of both sides of the counterweight beam. The top pressing members interact with the locking force of the outer side of the locking blocks to improve the locking performance.

The invention discloses an insulating shielding cover. The insulating shielding cover comprises an insulator shielding cover and a cross arm shielding cover; the insulator shielding cover comprises a shielding cover body; the two sides of the shielding cover body are provided with connecting arms opposite to each other; clamping plates connected with the shielding cover body are arranged at the lower ends of the connecting arms; fixed pressing plates are arranged on the outer side walls of the connecting arms; one side of the shielding cover body is a horizontal side wall; a place reservation hole is formed in the lower part of the horizontal side wall; one end of the cross arm shielding cover is connected with the horizontal side wall; and the cross arm shielding cover communicates with the insulator shielding cover through the place reservation hole. Not only is the tightness of shielding at the joint guaranteed, but also the repeated shielding of the joint is avoided; time and shielding tools are saved; and the working efficiency is improved.

The invention relates to an installation system for a power distribution device, comprising a fixed slide frame and a slide rail press-fitted into the slide frame, the slide rail is provided with a power distribution device and at least A groove, the groove has opposite first side and second side, the said at least one groove is installed with a positioning piece that prevents the sliding frame and the slide rail from sliding relative to each other, and the positioning piece includes a laterally extending The body, the body has a side abutting against the carriage and has two opposite ends in the transverse direction, one end is provided with a tenon part, and the tenon part is connected with the first side and the second side of the groove. The side is extrusion fit, and the end of the body opposite to the tenon is a free end, and the tenon is provided with a protrusion for pressing the tenon into the groove or pulling it out from the groove through the free end out of the lever fulcrum.

The invention relates to the technical field of building construction, and particularly discloses a shear wall end cap formwork reinforcement system, comprising a beam for fixing a side form, and a fixing beam for fixing an end cap plate, wherein a reinforcement steel tube is welded on the beam, and the steel tube and the fixing beam are fixed by cross-pulling screws. The shear wall end cap formwork reinforcement system has the advantages that the beam and the fixed beam are fixed by the cross-pulling screws, effectively prevents the side molds from sliding relative to each other when pouringconcrete, and the quality of poured concrete is good; at the same time, the installation and disassembly are convenient.

The invention belongs to the technical field of wood-plastic plates and particularly discloses a fabricated composite wood-plastic plate. The fabricated composite wood-plastic plate comprises a firstplate body, a second plate body, a connecting block and a step groove; the first plate body is connected with the second plate body, and the connecting block is arranged at the position, correspondingto the second plate body, of one end of the first plate body; a first arc-shaped groove is formed in the position, corresponding to the connecting block, of one end of the first plate body; a slidingring is elastically connected to the connecting block, a connecting module is hinged to the outer side of the sliding ring, and a fast demounting module is arranged on the inner side of the connecting block; and a second arc-shaped groove is formed in the position, corresponding to the first arc-shaped groove, of one end of the second plate body, an arc-shaped sliding block is arranged on the inner side of the end, close to the first arc-shaped groove, of the second arc-shaped groove, the junction of the second arc-shaped groove and the step groove is elastically connected with a clamped connection module, and a clamping block is arranged on the side, located on the clamped connection module, of the inner side of the second arc-shaped groove. The connecting efficiency of the first plate body and the second plate body can be improved, and the demounting and mounting efficiency is improved.

The invention provides an embracing-hoop type elevator counterweight filler cover component. The embracing-hoop type elevator counterweight filler cover component comprises a cover component body, wherein the whole of the cover component body is in a rectangular-frame shape, the cover component body is arranged on the periphery of a vertical beam of a counterweight filler housing in an embracing-hoop mode and is locked, the cover component body comprises four L-shaped locking blocks which are connected in a head-to-tail mode in sequence, and every two adjacent locking blocks are locked through bolt locking assembly. According to the embracing-hoop type elevator counterweight filler cover component, sequential connection of the four L-shaped locking blocks is adopted, regulating tanks are formed in connection parts, size is convenient to adjust, the embracing-hoop type elevator counterweight filler cover component is suitable for vertical beams of counterweight filler housings with different thicknesses and sizes, and the applicability of the embracing-hoop type elevator counterweight filler cover component is improved; in addition, according to the embracing-hoop type elevator counterweight filler cover component, friction between the cover component body and the vertical beam of the counterweight filler housing is improved, friction between contacting surfaces of two adjacent locking blocks is improved, the friction performance is improved effectively, mutually sliding is prevented, and the locking performance is improved.

The invention relates to the technical field of building construction, and specifically discloses a prefabricated sandwich superimposed shear wall reinforced structure. The prefabricated sandwich superimposed shear wall reinforced structure comprises cross beams used for fixing side forms, and fixing beams used for fixing bulkheads; a reinforcing steel pipe is welded on the cross beams; and the steel pipe and the fixing beams mutually fixed through a split screw rod. The prefabricated sandwich superimposed shear wall reinforced structure disclosed by the invention has the advantages that the cross beams and the fixing beams are fixed through the split screw rod, so that the sliding between the beam side forms is effectively prevented during concrete pouring; the concrete pouring quality isgood; and at the same time, installation and disassembly are convenient.

The invention discloses a cylindrical grinding device suitable for reducing shafts. The cylindrical grinding device comprises a workbench, wherein two ends of the top of the workbench are provided with a driving wheel set and a driven wheel set respectively; a grinding set positioned on one side of the top of the workbench is arranged between the driving wheel set and the driven wheel set; one sides of the driving wheel set and the driven wheel set are each provided with a pressing wheel set correspondingly; the driven wheel set comprises a transverse plate positioned below the workbench; thetransverse plate is provided with a lead screw lifter; the top of the lead screw lifter is connected with a lifting table; the top of the lifting table is provided with two parallel second rotating wheels; the pressing wheel set comprises a pressing wheel; one end of the pressing wheel is rotatably connected to a connecting seat; the connecting seat is connected with a rotating arm through a roundrod; and a pressing spring positioned outside the round rod is arranged between the connecting seat and the rotating arm. The cylindrical grinding device is suitable for grinding reducing shafts andhas the characteristic of high grinding precision.

The present invention discloses a universal hinged in-ear hearing aid, comprising front, middle and rear parts of the hearing aid, the front part of the hearing aid includes a loudspeaker, the rear part of the hearing aid includes a body, and the middle part of the hearing aid includes a sound Conducting device, the sound conducting device is a hinged connection device, one end of the hinged connection device is connected to the front of the hearing aid, and the other end is connected to the rear of the hearing aid, the rotation of the hinged connection device The angle can be controlled freely, and the rotation elevation angle can be as high as 60 degrees, which can meet the requirements of the corner of the human ear canal. The in-ear hearing aid provided by the present invention can be completely placed in the ear, has strong concealment, and always maintains elastic contact with the ear canal, and its front part can be placed in the deep ear canal close to the eardrum of the human body. Air circulation, long-term wearing is not easy to sweat, effectively reduce feedback and occlusion effects, the transmitted sound is clear, and the gain loss is small. It is a universal flexible in-ear hearing aid suitable for any hearing-impaired patients.