34results about How to "Avoid horizontal rotation" patented technology

The invention provides a protective cover and an isolation switch equipped with the same, and belongs to the technical field of parts of an electric switch apparatus. The protective cover comprises a cover body, a threading port and a first operating port, wherein the cover body is suitable for being mounted on the base of the isolation switch and used for covering at least one contact base which is mounted on the base and used for connecting an inlet wire or an outlet wire; the threading port is formed in the cover body or between the cover body and the base, and used for allowing the inlet wire or the outlet wire to pass through; and the first operating port is formed in the cover body and used for allowing an operating tool to pass through to connect the inlet wire or the outlet wire on the contact base or remove the connection between the inlet wire and the contact base or between the outlet wire and the contact base. The protective cover provided by the invention is mounted on the base of the isolation switch, so that the contact base connected with the inlet wire or the outlet wire can be covered; and the first operating port is formed in the protective cover, the inlet wire or the outlet wire on the contact base can be connected and contacted without detaching the protective cover, so that wire connecting and wire detaching steps of the isolation switch can be simplified.

The invention discloses a horizontal connecting structure for an assembled wall. The horizontal connecting structure comprises the wall. The wall comprises a first wall and a second wall connected toeach other in a vertical direction. A first step is arranged on the first wall, a second step is arranged on the second wall, and the first step and the second step encircle a straight slot. The horizontal connecting structure also comprises a connecting part arranged in the straight slot and matched with the straight slot. The connecting part is of a plate structure. The connecting part is connected to the first wall and the second wall through bolts, separately. Compared with a splicing mode in the prior art, the adjacent two walls in the two vertical directions are connected by means of theconnecting part of the plate structure, and the connecting area of the two spliced walls is increased, so that the spliced wall is steadier, meanwhile, use of bolts is also reduced, the constructionsteps are simplified, the construction difficulty is reduced, the construction efficiency is improved and the construction cost is lowered.

The invention provides a universal self-adaption fixture for a sliding friction-wear test. The universal self-adaption fixture for the sliding friction-wear test comprises a force transmission shaft, a locating pin, a steel ball and an upper sample, wherein the upper end of the force transmission shaft is fixedly connected with a friction-wear testing machine, the locating pin is in interference fit with the force transmission shaft, and is in clearance fit with the upper sample. On one hand, the upper sample can be prevented from self-rotating along the force transmission shaft in the sliding friction-wear test, and on the other hand, the upper sample can be guaranteed to have enough space to carry out micro universal adjustment. The steel ball is arranged between the force transmission shaft and the upper sample, and is used for achieving the universal adjustment of the upper sample in the sliding friction-wear test. An oil hole is formed in the upper sample and used for storing lubricating oil, and the flexible rotating of the steel ball is guaranteed. The universal self-adaption fixture for the sliding friction-wear test can maintain surface-to-surface contact consistently, and has the advantages of being high in reliability, simple in structure and low in manufacture cost.

The invention provides a stable instrument tripod. The stable instrument tripod comprises a top plate, a bottom plate, a supporting rod and a limiting cover, wherein a mounting hole is formed in the middle part of the top plate, and the lower end of the supporting rod is arranged in the mounting hole in an inserted mode; four supporting legs are arranged between the top plate and the bottom plate,one ends of the four supporting legs are inserted in the space between the top plate and the bottom plate, and the other ends of the four supporting legs extend outwards to form radial structures; four fixing bolts penetrate through the top plate and the bottom plate, and the four fixing bolts penetrate through the inward ends of the four supporting legs correspondingly; the limiting cover coversthe top plate, the supporting rod penetrates through the limiting cover, a plurality of positioning piles are arranged on the top plate, a plurality of positioning sleeves are fixedly arranged on theinner side wall of the limiting cover, and the plurality of positioning sleeves are connected with the plurality of positioning piles in a inserting and one-to-one correspondence mode; and four limiting clamping plates are fixedly arranged at the bottom of the limiting cover, and the four limiting clamping plates are clamped in the included angles between every two adjacent supporting legs correspondingly. According to the stable instrument tripod, the limiting cover and the limiting clamping plates are arranged in an aligned mode so that rotation of the four supporting legs can be avoided, it is guaranteed that an instrument is not prone to topple when pulled, and the stability of the instrument in the moving process is improved.