98results about How to "Large lifting stroke" patented technology

A device for turning over and transferring the patient comprises a base, a lifting mechanism, an extension arm, a cantilever beam, and a turn driving device. The lifting mechanism comprises a lifting post and a lift driving device. The lifting post is fixed to the base; the lift driving device is fixed to the lifting post. The extension arm has a first end and a second end. The lift driving device is operatively connected to the first end for driving the extension arm to move up and down along the lifting post. The cantilever beam is connected to the second end and extending away from the lifting post. The turn driving device comprises a motor reducer, a revolutionary shaft, and two turning shafts. The motor reducer is connected pivotally to the cantilever beam. The revolutionary shaft is connected to the motor reducer; the revolutionary shaft rotates when it is driven by the motor reducer. The two turning shafts are fixed to both ends of revolutionary shaft, respectively, and turned relative to the motor reducer as the revolutionary shaft rotates.

The invention discloses a compact type lifting device. The compact type lifting device comprises a box body, a rolling executing mechanism and a rolling assisting mechanism, wherein the rolling executing mechanism is arranged inside the box body; the rolling assisting mechanism is matched with the rolling executing mechanism and is used for assisting the rolling of a wire; the box body is providedwith a wire inlet and a wire outlet; the rolling executing mechanism comprises a rolling roller and a rotation driving mechanism which is used for driving the rolling roller to rotate to implement rolling and unrolling; the rolling assisting mechanism is arranged at one side of the rolling roller and comprises a mobile frame and a movement driving mechanism, wherein the mobile frame is used for limiting the position, in the axis direction of the rolling roller, of a wire which is being rolled; the movement driving mechanism is used for driving the mobile frame to move in the axis direction ofthe rolling roller; the mobile frame is provided with a positioning part used for positioning the wire; and the wire is rolled on the rolling roller after bypassing the positioning part. The compacttype lifting device has the advantages of being capable of rolling a long wire and small in size.

The invention discloses a multifunctional platform, which belongs to the field of teaching equipment. The multifunctional platform comprises a lower supporting frame and an upper supporting frame, and an electric pushing rod and a guide assembly are mounted between the lower supporting frame and the upper supporting frame; a middle tabletop is arranged on the top of the upper supporting frame, a left tabletop and a right tabletop are respectively hinged with the left side and right side of the middle tabletop, and the size of each of the left tabletop and the right tabletop is one half of the size of the middle tabletop; a left drawer and a right drawer are respectively arranged on the left side and right side of the bottom of the middle tabletop; a middle drawer is arranged in the front part of the upper supporting frame; the middle drawer can be extended out of the platform for a certain distance through a middle drawer runner; a curtain-fixing device is mounted on the rear part of the upper supporting frame. The multifunctional platform is integrated with the functions of tabletop lifting, tabletop extension, multimedia projection and the like, is suitable for use by people with different statures, and greatly improves the comfort of speeches; moreover, the multifunctional platform can implement multimedia teaching under any environments, and not only is suitable for use in school teaching, but also can be used in meeting rooms, museums, exhibition halls and the like.

The invention relates to a full-automatic multi-grinding head independently moving polishing machine, which comprises a controller, a main motor, a cleaning device and a conveyer belt. A grinding head and a stand are fixedly connected with an upright post respectively, the top of the upright post is fixedly connected with an upper beam, and the grinding head is connected with a main shaft of a main shaft box. The polishing machine is characterized in that the main motor drives the main shaft of the main shaft box through a first-level conveyer belt, the main shaft is connected with the grinding head, the main shaft box is respectively connected with an independent left moving mechanism and an independent right moving mechanism as well as a lifting mechanism, and the lifting mechanism comprises a mechanical lifting mechanism and a pneumatic lifting mechanism. The polishing machine has a compact and reasonable structure, a single grinding head can swing solely, and the single grinding head can solely grind an irregular plate with an unfilled corner, so that the polishing machine radically solves a fundamental problem for stabilizing yield and quality. The polishing machine adopts pneumatic and mechanical double-level lifting so as to increase lifting stroke, and is widely applied for machining stones, so that the polishing machine not only can grind the prior stones, but also can grind various boulder strips with different heights and specifications. The polishing machine has the advantages of high working efficiency and long service life.