4results about How to "Down stable" patented technology

The utility model relates to the technical field of construction platforms, in particular to an expressway bridge construction platform which comprises a driving vehicle, a rectangular platform arranged on one side of the driving vehicle, a first telescopic rod, a second telescopic rod, a third telescopic rod, a fourth telescopic rod and a supporting frame used for being connected with the top ends of the four telescopic rods, the driving vehicle is connected with the supporting frame through a connecting frame, a hydraulic cylinder is arranged on the supporting frame, a rod head of a piston rod of the hydraulic cylinder vertically extends downwards to be in driving connection with the rectangular platform, a first synchronous structure is arranged between the first telescopic rod and the second telescopic rod, and a second synchronous structure is arranged between the second telescopic rod and the third telescopic rod. A third synchronous structure is arranged between the third telescopic rod and the fourth telescopic rod. According to the lifting device, large-amplitude shaking generated in the lifting process of the construction platform can be effectively relieved, workers on the construction platform are prevented from feeling fear, and the working quality and the working efficiency of the workers are improved.

This invention relates to the field of lifeboat lifting, and discloses a lifeboat lifting device for passenger ships, including a swing arm structure, a swing arm drive device, and a lifting drive device installed on the passenger ship. The lifting drive device is connected to the lifeboat. The swing arm structure is provided with an anti-sway structure. The swing arm structure includes a vertically arranged sleeve assembly. A lifting cable on the swing arm drive device is connected to the top of the swing arm structure. The arc-shaped rod is provided with a toothed groove. The swing arm structure is provided with a swing arm locking device that stops the rotation of the swing arm structure by engaging with the toothed groove. The beneficial effects of this invention compared with the prior art are: when the swing arm structure rotates, the angle transmission structure drives the connecting gear to make the sleeve assembly rotate in the opposite direction around the sleeve axis at the same angle as the swing arm structure, so that the sleeve assembly is always in a vertical state, suppressing the swaying of the lifting cable, greatly improving the stability of the lifeboat during movement, reducing the swaying amplitude caused by inertia, reducing cable wear, and ensuring the safety of passengers.

The utility model discloses a soil sample collection device for soil ecological restoration belongs to environmental management equipment technical field, a soil sample collection device for soil ecological restoration, including mobile seat, the top fixedly connected with mounting bracket of mobile seat, two guide rods are fixedly connected between the top and bottom inner wall of mounting bracket, the outer periphery slidingly connected with mobile frame of guide rod, install sampling mechanism on mobile frame, sampling mechanism is including the bottom outer tube and sampling motor of installation on mobile frame, it can install broken drill bit at bottom outer tube bottom end, make the soil layer penetration stability get the promotion, and then improved the sampling efficiency, utilize bottom outer tube insulating hole wall collapse pollution simultaneously, and bottom inner tube rotates and presses down, utilize spiral sampling drill bit and rotate the sample to the empty cavity in storage, effectively avoided the cross -contamination of interlayer soil, improved the authenticity of detection data.

This invention relates to the field of machining technology, specifically to a multi-stage buffering fixture for clamping the shaft of a heavy workpiece. The fixture includes a support plate and two clamping jaws. The two jaws jointly clamp the main shaft of the workpiece. A first support point is located near the center of each jaw, and a second support point is located between the first support point and the rotating shaft. A limiting groove is formed on the support plate, and the shaft is movably disposed within the limiting groove. Hydraulic rods providing hydraulic support are connected to both ends of the shaft. A buffering mechanism is provided on the outer wall of the support plate, with its elastic movable end abutting against the second support point of the clamping jaws. Through the coordinated operation of the hydraulic rods and the buffering mechanism on the support plate, when the heavy workpiece falls, its deceleration and stopping time is greatly extended, thereby transforming the instantaneous rigid impact into a controllable buffering process, fundamentally avoiding permanent deformation or damage to the fixture structure caused by the enormous impact force.