7results about How to "Consistent clearance" patented technology

The invention discloses a laser welding process of a neodymium iron boron Halbach magnetic assembly. The laser welding process comprises the following steps: firstly, arranging a plurality of magnetized magnets in a Halbach array form; then glue is dispensed on the butt joint faces between the adjacent magnets, and the multiple magnets are glued to form a Halbach magnetic assembly; next, adjacent magnets are welded and fixed on the weak magnetic surface of the Halbach magnetic assembly in a nanosecond laser welding mode; glue is dispensed at the welding position, and the welding seam is filled and covered with glue while the Halbach magnetic assembly and the magnet fixing piece are fixed in a glue joint mode. According to the method, the Halbach magnetic assembly is assembled in the mode that glue joint is conducted firstly and then nanosecond laser welding is conducted, the welding operation is easy to conduct, the welding position is accurate, and magnetic performance attenuation can be controlled within a small range.

The utility model relates to a novel ear picking device and a corn harvester, the ear picking device comprises a rack, two stem pulling rollers and two rear straw cutters, the two stem pulling rollers are installed on the rack in a relatively horizontal rotation mode; the two rear straw cutters are oppositely and fixedly installed on the rack and located on the sides, away from each other, of the rear portions of the two stem pulling rollers, and the rear ends of the rear straw cutters extend out of the rear ends of the two stem pulling rollers respectively. The ear picking table has the advantages that the structure is simple, all parts are reasonably distributed, the position relation of key parts is confirmed and optimized through field tests by researching the working principle of the ear picking table, the problems that ear feeding is not smooth and ear conveying channels are blocked by trigram straw at the rear end are solved by optimizing parameters, and the ear picking table is high in practicability. Therefore, the occurrence of personal and commercial change accidents caused by header maintenance is reduced, the working efficiency is improved, and the user experience is improved.

The invention discloses a spiral arch expander production device which comprises a bottom plate and further comprises an assembling tool body arranged at the top of the bottom plate, an arch expander body arranged on the assembling tool body and a pushing assembly arranged on the bottom plate and used in cooperation with the assembling tool body. The assembling tool body plays a role in assembling the arch expanding device body; the assembling tool body comprises a movable block arranged on the top of the bottom plate in an abutting mode, a fixed block fixedly arranged on the top of the bottom plate and located on the right side of the movable block, a plurality of springs fixedly arranged between the movable block and the fixed block, and a first rectangular containing groove formed in the right end of the top of the movable block. The first rectangular placement groove is formed in the top of the fixing block, the second rectangular placement groove is formed in the top of the fixing block, the communicating groove is formed in the fixing block and communicates with the second rectangular placement groove, and the communicating groove is located between the first rectangular placement groove and the second rectangular placement groove.

The utility model relates to a positioning structure for a heat exchange tube in a heat exchanger. The positioning structure comprises a heat exchange body, an upper end cover and a lower end cover, a heat exchange tube sleeve group for inserting heat exchange tubes is arranged in the heat exchange body; positioning protrusions are arranged on the inner wall of one end of the heat exchange pipe sleeve set and evenly distributed on the inner wall of the heat exchange pipe sleeve set, and the distance between the positioning protrusions is matched with the outer diameter of the heat exchange pipe. The upper end cover is installed on the upper portion of the heat exchange body, an upper positioning protrusion protruding downwards is arranged on the lower portion of the upper end cover, and the upper positioning protrusion abuts against the upper portions of the heat exchange pipes. The lower end cover is installed on the lower portion of the heat exchange body, a lower positioning protrusion protruding upwards is arranged on the upper portion of the lower end cover, and the lower positioning protrusion abuts against the lower portion of the heat exchange pipe so as to limit the heat exchange pipe from moving downwards. The heat exchanger has the advantages that the heat exchange tubes are convenient to install and stable in positioning, and gaps between the heat exchange tubes and the heat exchange tube sleeves are consistent.

The present invention relates to the field of busbar connection, and in particular to a protective busbar connection device, including a mounting plate, a clamping frame and a slide bar; a plurality of clamping frames are connected to the mounting plate; a plurality of slide bars are connected to the mounting plate. The present invention realizes that the gaps between the connecting pieces are kept consistent through the clamping plate, thereby avoiding the connecting pieces from being in a movable state. When installing the connector, it is difficult to align the gaps between the connecting pieces and the copper bar of the busbar trough, resulting in low installation efficiency and the problem of mutual squeezing between the connecting pieces and the copper bar. Through the use of pressure blocks of different lengths, the connecting pieces are flipped at different angles on the connecting axis, thereby causing the connecting pieces to form an angular misalignment. During installation, workers can clearly distinguish each connecting piece through the front and rear directions, thereby avoiding visual errors that may easily lead to workers inserting the connecting pieces into the wrong gaps.

The application discloses a kind of manufacturing process of damp-proof inorganic composite material decorative plate, it is related to composite material decorative plate technical field, it solves when using hot press to heat treatment composite material decorative plate, heat source will be emitted to outside, to cause its energy waste, and with the increase of use frequency, spring between hot press plate will be because of multiple compression and aging, to change the gap between hot press plate, make its hot press plate cannot return to correct working position problem.The composite material plate includes a substrate layer, two damp-proof layers.By the application, the heat source emitted during the operation of the equipment can be automatically collected and recycled, and the hot press plates can be automatically separated without using springs, ensuring that the gap between the hot press plates is always consistent and the size of the gap does not change, and ensuring that the hot press plates can return to the correct working position.

The utility model belongs to the technical field of bevel gear heat treatment equipment, and particularly relates to a bevel gear heat treatment device. According to the specific technical scheme, the device comprises a first harness material disc and a second harness material disc, and the second harness material disc is matched with the first harness material disc; a plurality of second through holes are uniformly formed in the second harness tray; a plurality of first through holes are formed in the first harness material disc, a plurality of fixing pins are uniformly distributed on the first harness material disc and among the first through holes, during working, the first harness material disc is placed on the second harness material disc, and a gear is arranged on the fixing pins in a penetrating manner. The plane space of the first harness tray can be utilized to the maximum extent, gear gaps can be consistent, and heat treatment uniformity is guaranteed.