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

The invention provides a measuring, positioning and supporting device convenient to adjust and used for traffic construction. The device comprises a supporting plate, a mounting plate, a fixing bolt, a mounting frame, tool storage boxes, a side protection limiting frame structure, a lifting supporting frame structure, a contraction frame, a fixing bracket, an adjustable positioning bracket structure, a front side fixing plate, a fixing rod, a connecting ring, an auxiliary supporting rod and a pedal; the mounting plate is mounted at the lower part of the supporting plate through the fixing bolt; the mounting frame is welded at the lower part of the outer side of the mounting plate; and the tool storage boxes are embedded into the left side and the right side of the interior of the mounting frame correspondingly. According to the measuring, positioning and supporting device convenient to adjust and used for traffic construction, the inner side of a storage groove is in shaft connection with a limiting bracket, the limiting bracket can be conveniently used for limiting a rotary supporting plate during use, thus, after the limiting bracket is rotated upwards, the rotary supporting plate can be conveniently prevented from rotating on the outer side of a fixing shaft rod, and the positioning effect of the fixing bracket can be improved through the limiting bracket.

The invention discloses a punching device for an accounting book. The punching device comprises a base, a stand column, a drilling machine and a control switch, wherein the stand column is perpendicularly mounted on the upper part of the base; the upper end of the stand column is equipped with a spindle box; a worm is mounted inside the spindle box; one end side of the worm is connected with a pressing rod; the end side of the spindle box is equipped with a spindle; the position, which corresponds to the worm, outside the spindle is equipped with a gear ring in a surrounding mode; a blocking plate is arranged inside the spindle box; the gear ring is positioned between groups of blocking plates; the spindle is internally hollow; the drilling machine is fixedly mounted at the lower end inside the spindle; a limiting ring is arranged on the outer surface of the lower part of the spindle; the limiting ring is positioned on the outer part of the spindle box; the lower part of the limiting ring is equipped with four groups of extrusion springs at equal angles; the lower ends of the extrusion springs are connected with slide rings; the lower ends of the slide rings are equipped with fourgroups of ejector rods at equal angles; the bottom ends of the ejector rods are connected with a base plate; and the position, which corresponds to the rotary shaft of the drilling machine, of the middle part of the base plate is provided with a hole slot.