7 results about "Connection type" patented technology

The invention relates to a composite connection type hydraulic knife handle. The composite connection type hydraulic knife handle comprises a main knife handle body and an elastic thin-wall inner ringarranged in the main knife handle body, wherein a hydraulic oil cavity is arranged between the main knife handle body and the elastic thin-wall inner ring; the elastic thin-wall inner ring is arranged as a barrel thin-wall structure with two thick ends and a thin middle part; and the side outer rings of the two ends of the elastic thin-wall inner ring make contact with the support surfaces of inner holes of the main knife handle body. The main knife handle body and the elastic thin-wall inner ring are fixed in a manner of combining brazed connection and interference fit connection, the effectof stress on the connection performance of the main knife handle body and the elastic thin-wall inner ring is reduced, the joint of the main knife handle body and the elastic thin-wall inner ring isprevented from tear under the high pressure state, and therefore the service life of the hydraulic knife handle is prolonged. Meanwhile, by improving the structure of a piston rod and the structure ofa piston sleeve, the piston sleeve is quickly maintained, the overall sealing performance of a hydraulic access is improved, and the overall strength of the hydraulic knife handle is improved.

The invention relates to a wind-solar hybrid grid-connected power generation system formed by parallel connection of multiple wind generating sets. The grid-connected power generation system comprises at least two wind generating sets, a solar cell array, a control device and a grid-connected inverter. The at least two wind generating sets are respectively connected with rectifiers, each of the rectifiers is interconnected with the control device; the solar cell array is interconnected with the control device, and the control device is interconnected with a grid-connected inverter. Compared with the prior art, the grid-connected power generation system has high reliability, low cost and convenient maintenance when the power is below 300KW, and is suitable for the current situation of power transmission and transformation of Chinese rural power grid.

The invention discloses a separation and connection type land wheel of a pneumatic sower and a transmission device of the land wheel, and belongs to the technical field of pneumatic sowers. The land wheel aims at solving the problems that the design of an existing land wheel transmission device is not reasonable, the sowing distance is not accurate, and seeds are wasted in the process of row-changing sowing. The land wheel comprises a land wheel supporting arm plate, a seed discharging device power transmission assembly, a land wheel transmission assembly, an upper chain wheel, a lower chain wheel, chains and a land wheel body, an installing hole of the seed discharging device power transmission assembly and an installing hole of the land wheel transmission assembly are respectively processed in a land wheel supporting arm plate body, and the seed discharging device power transmission assembly and the land wheel transmission assembly are installed on the land wheel supporting arm plate; the upper chain wheel is installed on the seed discharging device power transmission assembly, the lower chain wheel is installed on the land wheel transmission assembly, the upper chain wheel and the lower chain wheel are installed through the chains, and the land wheel body is installed on the land wheel transmission assembly. By selecting a corresponding transmission mode, the accurate transmission ratio is designed and calculated, it is ensured that the plant distance is consistent, the waste of seeds is reduced, and the cost is reduced.