Abstract: Disclosed are a connecting rod structure, a footboard device, and a vehicle including same. A first connecting rod includes a first end pivotally connected with a second seat through a first pivot shaft, and a second end hinged with a first end of a second connecting rod; a spring includes a first end pivotally connected with the second seat through a second pivot shaft, and a second end pivotally connected with the first connecting rod or the second connecting rod through a third pivot shaft; a distance between an axis of the first pivot shaft and an axis of the third pivot shaft is a first distance, and a distance between the axis of the first pivot shaft and an axis of the second pivot shaft is a second distance; and a sum of the first distance and a free length of the spring is greater than the second distance.

Abstract: A rapid cleaning system of milking cups in milking hall is provided. The rapid cleaning system includes a bottom plate, a supporting pipe fixed on the top of the bottom plate, a supporting positioning component fixed on the top of the supporting pipe, a lifting mechanism sliding sleeved with the supporting pipe, and a clamping and fixing mechanism connected to the outer ring of the supporting pipe and the supporting positioning component. A placing platform for the milking cup group is provided, in the process of placing the milking cup group, the milking cup group is cleaned and disinfected.

Abstract: An extendable and a retractable vehicle step may comprise one or more assemblies. An assembly may comprise a first support arm pivotably coupled to a second support arm for extending and retracting a vehicle step. The second support arm may pass through a sleeve that may support and/or guide the second support arm. The sleeve may be rotatable and/or may comprise one or more rollers that may facilitate movement of the second support arm.

Abstract: A layer of wires is preliminarily stranded by a layer of strand-through holes, and a first strand cylinder is used for the second pressing and stranding. The next layer of special-shaped single wires is stranded through a second pre-stranding assembly, and then the last layer of wires is stranded through a main stranding mold, thus stranding a plurality of layers at the same time with a compact structure. The outer circumference of the guide roller matches that of the special-shaped single wire, avoiding the reduced quality of stranded cable core. The first rotating connector is bowl-shaped and is provided with a layer of strand-through holes together with a structure in which a first pull rod is in fit with the rotating connector and a structure in which a second pull rod is in fit with the rotating connector.

Abstract: A layer of wires is preliminarily stranded by a layer of strand-through holes, and a first strand cylinder is used for the second pressing and stranding. The next layer of special-shaped single wires is stranded through a second pre-stranding assembly, and then the last layer of wires is stranded through a main stranding mold, thus stranding a plurality of layers at the same time with a compact structure. The outer circumference of the guide roller matches that of the special-shaped single wire, avoiding the reduced quality of stranded cable. The first rotating connector is bowl-shaped and is provided with a layer of strand-through holes together with a structure in which a first pull rod is in fit with the rotating connector and a structure in which a second pull rod is in fit with the rotating connector.