47results about How to "Improve jacking efficiency" patented technology

A multilevel speed regulation jack includes an input oil cylinder, an output oil cylinder, and a fluid conduit member between the cylinders. The output oil cylinder includes a cylinder body containing an annular space and a tube piston, which fits in the annular space. A sliding sleeve of the tube piston is movably positioned in the annular space. An annular in-flow oil chamber is formed between the end annular surface of the tube piston and the cylinder body, and a central in-flow oil chamber is formed between the inner central surface of the piston and the cylinder body. The fluid conduit member includes at least two parallel fluid channels connected to the central in-flow oil chamber and the annular in-flow oil chamber, respectively. A control valve in one of the fluid channels opens / closes the channel. The jack can automatically switch between different jacking speeds based on the load sensed by the system and therefore has a high jacking efficiency.

The invention relates to an automatic guiding transportation vehicle and a jacking device thereof, and belongs to the technical field of automatic guiding transportation robots. The automatic guidingtransportation vehicle comprises a substrate, a driving mechanism which is arranged on the substrate, a first rotating shaft which is horizontally arranged on the substrate and connected with the driving mechanism and rotates under the driving of the driving mechanism, and at least one jacking seat which is connected with the first rotating shaft and moves up and down under the driving of the first rotating shaft. According to the jacking device based on the lever effect principle, the magnitude of acting force is adjusted by adjusting the length of a force arm of the acting force; moreover, jacking operation can be realized only by little rotation of the rotating shaft; the power of the driving mechanism is small; the jacking efficiency is high; the jacking structure is labor-saving; andunder the same jacking force, a motor needs less power.

The invention discloses a reinforcing device for a railway turnout area circuit during jacking for a frame bridge. The reinforcing device comprises a transversal beam and a longitudinal beam, wherein the transversal beam is placed right below a sleeper; a longitudinal steel plate is cushioned between the sleeper of a point rail switch part in a turnout area and the transversal beam; the transversal beam is connected with the sleeper by a U-shaped clamp, an overhead rail beam and a cover plate; and the steel plate is tightly clamped between the transversal beam and the sleeper. After the improvements aforementioned are performed for reinforcing the circuit, the steel plate is connected with the sleeper above the steel plate, the transversal beam below the sleeper and the overhead rail beam, so as to ensure that the whole point rail in a point rail range is located on one plane and then the point rail flexibly rotates in the plane and can be normally used; with the adoption of the reinforcing device disclosed by the invention, the situation that the railway turnout point-rail section circuit is reinforced into an integral structure which is stable and reliable can be effectively ensured, and normal use for a turnout during circuit reinforcement and frame bridge jacking construction is ensured, thus meeting the safety requirements of driving, and reducing the workloads of maintenance and repair.