3 results about "Counterbore" patented technology

The invention discloses a vehicle oxygen sensor which comprises an oxygen-sensitive chip, a lead, a lead terminal, a chip cover component and a hexagonal base shell, wherein the chip cover component and the hexagonal base shell are sequentially connected from front to back, front and rear sections of counterbores are formed in a hexagonal base; a transition section between the two sections of counterbores is made into a chamfered conical surface; an elastic washer, a front support block, a sealing block and a rear support block are mounted sequentially from front to back in the two sections ofcounterbores; the front end surface of the sealing block is in contact fit with the chamfered conical surface; the hole edge of the rear section of counterbore closes inward to rivet the rear supportblock, and the rear support block is riveted to generate an axial force against the sealing block; a through hole leading to the inside of the chip cover component is formed in the bottom of the front section of counterbore; the oxygen-sensitive chip sequentially passes through the rear support block, the sealing block, the front support block, the elastic washer and the through hole and extendsinto the chip cover component. The vehicle oxygen sensor disclosed by the invention has good sealing property and other advantages.

The invention relates to the technical field of building decoration materials, in particular to a sliding door upper rail based on a building steel beam structure. The sliding door upper rail comprises a permanent magnet, fixing screws, pressing plates, a foundation plate, baffles and a U-shaped groove. The pressing plates are fixed above the foundation plate through the fixing screws. The two pressing plates are located on the two sides of the top of the foundation plate correspondingly. The permanent magnet is arranged between the pressing plates and is stably arranged above the foundation plate through the two pressing plates. A counterbore hole is formed in each pressing plate, and the fixing screws are located in the counterbore holes. The baffles are welded to the bottom of the foundation plate, and a U-shaped groove is formed between the baffles. By means of the sliding door upper rail based on the building steel beam structure, permanent magnet design is adopted above the foundation of a building steel beam, the whole upper rail is attracted to the bottom of the building steel beam through the permanent magnet, and hole drilling installation conducted during installation of a sliding door upper rail on a traditional building beam is avoided; and the sliding door upper rail is simple in structure, convenient to install and capable of well meeting the structural requirement of novel buildings.

The invention provides an automobile hand brake. The automobile hand brake comprises a supporting seat and a handle; the supporting seat is fixed together with the handle in a clamped manner; a counterbore hole is formed in the supporting seat; and a sealing ring is arranged in the counterbore hole. The automobile hand brake is simply structured and convenient to assemble and disassemble.