8results about How to "Achieve pre-positioning" patented technology

This utility model discloses a mechanical extension structure for a sofa, including a base, a drive unit, two bases for mounting the seat cushion structure, and extension units respectively mounted on the two bases. The extension unit includes a leg assembly, a swing mechanism, and a backrest assembly. The swing mechanism includes a front support rod, a middle connecting rod, a rear support rod, a front swing rod assembly, a connecting rod assembly, and a rear swing rod assembly. One end of the front support rod and one end of the rear support rod are respectively hinged to the middle connecting rod, and the other end of the front support rod and the other end of the rear support rod are respectively hinged to the base. The middle connecting rods of the two swing mechanisms are connected by a synchronizing rod. The front swing rod assembly includes a front main swing rod with one end hinged to the base and a front auxiliary swing rod with one end hinged to the middle connecting rod. The front main swing rod and the front auxiliary swing rod are hinged together. The rear swing rod assembly includes a rear main swing rod with one end hinged to the base and a rear auxiliary swing rod with one end hinged to the middle connecting rod. The rear main swing rod and the rear auxiliary swing rod are hinged together. The front swing rod assembly is connected to the rear swing rod assembly through the connecting rod assembly.

The utility model discloses a kind of fabricated building PC components. Including upper component and lower component, adjacent upper and lower component are connected by bolt. Upper component two ends are equipped with first lug and second groove, lower component end portion is equipped with second lug and first groove, and first lug and first groove, second lug and second groove shape are matched, realize accurate pre-positioning;The surface of the second lug of lower component is equipped with embedded hole, embedded hole is equipped with embedded part containing embedded nut and compression spring, the second groove of upper component is equipped with through-hole, bolt is sequentially connected with embedded nut after passing through through-hole, compression spring is compressed and generates sustained pre-tightening force when tightening bolt. The utility model is embedded by lug and groove to realize quick positioning, and the bolt connection structure of spring pre-tightening is combined to improve connection firmness, effectively solve the problem that existing PC component connection positioning is poor and easy to loosen, convenient to install and suitable for fabricated building construction.

The utility model relates to the technical field of testing devices, in particular to a tester convenient to replace, which mainly comprises an equipment main body, a sound insulation cover arranged on the equipment main body, a wall breaking machine arranged on the equipment main body, a tester main body arranged on the equipment main body, and a replacement assembly arranged on the equipment main body, the replacement assembly comprises a mounting base and a fixing groove, the mounting base is arranged on the equipment body, and an elastic piece is arranged on the mounting base. According to the tester convenient to replace, the fixing plate slides in the direction away from the positioning groove by pulling the connecting plate, a positioning block on a new tester main body is aligned with the positioning groove and clamped into the positioning groove, so that pre-positioning of the tester main body is achieved, at the moment, the fixing plate and the fixing groove are located on the same horizontal line, and replacement is convenient. A worker loosens the connecting plate, and the elastic force of the elastic piece can drive the fixing plate to be clamped into the fixing groove, so that the tester main body is fixed, and the worker can conveniently and quickly replace the tester main body.

This utility model provides a ceramic wear-resistant elbow with a steel outer shell, comprising: a steel outer shell body, a base tube disposed on the steel outer shell body, and a ceramic sheet disposed on the inner side of the steel outer shell body; and a locking assembly disposed on the steel outer shell body, the locking assembly including an arc-shaped plate and a fixing ring, the arc-shaped plate being disposed on the ceramic sheet, the fixing ring being disposed on the inner side of the steel outer shell body, the fixing ring having a threaded post, and an arc-shaped groove being disposed on the inner side of the steel outer shell body, with a threaded hole disposed on the inner side of the arc-shaped groove. This utility model achieves fixation by aligning the arc-shaped plate on the ceramic sheet with the arc-shaped groove and sliding it in, then installing the fixing ring at both ends of the inner side of the steel outer shell body, and screwing the threaded post into the mounting hole. This two sets of fixing rings fix the position of the ceramic sheet, thus preventing the ceramic sheet from falling off during transportation.

The utility model discloses a motor exhaust structure which comprises a valve body, a motor and an air pipe, the valve body is located in the motor and fixed on a stator in the motor, the valve body is provided with an exhaust channel, the air pipe is connected with the valve body and penetrates out of the motor, and two ends of the air pipe are respectively communicated with the exhaust channel and external air. In the working process of the motor, the temperature of the motor rises to cause the air pressure in the motor to rise, air can be discharged from the motor in time through the exhaust channel and the air pipe, and meanwhile, cooling liquid carried by the air can be filtered through the valve body and flows back into the motor through the exhaust channel, so that the motor cooling liquid is prevented from being reduced and the service life of the motor is prolonged. And the working safety of the motor is improved.

The utility model relates to the technical field of bus ducts, in particular to an intensive bus duct capable of being quickly positioned, combined and assembled, which mainly comprises a first bus duct, a second bus duct and an assembling component, wherein the first bus duct is provided with a first conducting bar, the first conducting bar is provided with a second conducting bar, and the second conducting bar is provided with a second bus duct; the assembling assembly comprises a spring and a fixing groove, the spring is arranged on the second bus duct, and a fixing block is arranged on the spring. According to the intensive bus duct capable of being quickly positioned, combined and assembled, pre-positioning of the first bus duct body and the second bus duct body is achieved by controlling the positioning rods to be clamped into the positioning grooves, at the moment, the second conducting bar is completely clamped into the first conducting bar, meanwhile, the fixing grooves are aligned with the fixing blocks, and through the elastic force of the springs, the first conducting bar body and the second conducting bar body are fixed. And the two groups of fixing blocks can be driven to penetrate through the positioning grooves to be clamped into the fixing grooves at the same time, so that the first bus duct and the second bus duct can be fixed, and rapid positioning and assembling of the bus duct and the second bus duct can be realized.

The invention relates to the technical field of offshore current conversion, and discloses an upper module and an offshore converter station. The first pile leg penetrates through the platform, and the lower end of the first pile leg abuts against a jacket of the offshore converter station; the lifting device comprises a fixing frame, a telescopic part and two positioning parts, the fixing frame is detachably connected with the platform and arranged on the first pile leg in a sleeving mode, the positioning parts and the first pile leg can be connected or separated, the telescopic part is arranged in a telescopic mode and connected between the two positioning parts, one positioning part is connected with the fixing frame, and the other positioning part and the fixing frame are arranged in a spaced mode. The gravity center of the upper module is low in the transportation process, the gravity center can be increased through lifting in the assembling process, and it is guaranteed that installation meets the requirement.