4results about How to "Low rolling friction" patented technology

The invention discloses a variable radial plunger pump, and relates to the technical field of plunger pumps, the variable radial plunger pump comprises a first shell and a second shell which are fixed through bolts, the interiors of the first shell and the second shell are sealed to define a sealing cavity, the variable radial plunger pump further comprises an eccentric mechanism, the eccentric mechanism comprises an eccentric wheel and a clamping shaft, and the eccentric wheel is located in the sealing cavity; a sliding clamping block is in sliding connection in the radial direction, a driving assembly is fixedly connected, and the output end of the driving assembly is in threaded connection with the sliding clamping block. The eccentric distance between the eccentric wheel and the clamping shaft can be adjusted, when the eccentric wheel eccentrically rotates, the stroke of the piston column is controlled in cooperation with the spring pipe, oil pumping work of hydraulic oil of different flows is conveniently conducted, and the power of the plunger pump is rapidly adjusted; the lifting column is controlled to stretch into and draw out of the fixing pipe so as to control the size of the oil pumping working area, namely the negative pressure space, in the fixing pipe, and adjustment in a larger range can be conducted in cooperation with work of the eccentric mechanism.

A box transformer substation top cover multifunctional storage device comprises a base plate, at least two storage vertical beams are installed on the base plate, storage hooks are installed on the storage vertical beams, the two ends of a storage rod are horizontally placed on the storage hooks, a supporting vertical beam is further installed on the base plate, and the upper end of the supporting vertical beam is fixedly connected with the upper end of the storage vertical beam; through the assembly of the storage hooks, the storage rods and the storage vertical beams, the distance between the upper-layer storage hooks and the lower-layer storage hooks is adjusted according to the thickness of the top cover, the storage rods bear the gravity of the top cover through the combination of the storage devices, and it is ensured that the upper-layer top cover and the lower-layer top cover do not make contact; according to the multifunctional storage device, the risks of collision, extrusion deformation and paint falling between the top covers are avoided, the space is saved, the universality is high, the universal wheels are installed on the chassis, and the free moving and fixing effects of the storage device can be achieved.

The utility model discloses a clamping device for precision die machining, which belongs to the technical field of die production and machining, comprises a workbench, and is characterized in that an insertion hole is formed in the top wall of the workbench, a supporting plate is fixedly mounted in the insertion hole, a movable plate is mounted in the insertion hole in a sliding manner, and balls are uniformly and movably embedded in the top wall of the movable plate; the movable plate is fixedly installed on the inner bottom wall of the workbench, the supporting plate is fixedly installed on the inner bottom wall of the workbench, through holes matched with the balls are formed in the top wall of the supporting plate, a first motor is fixedly installed on the inner bottom wall of the workbench, a one-way threaded rod is fixedly installed at the output end of the first motor, and the one-way threaded rod penetrates through the movable plate. The movable plate can move upwards until the balls penetrate through the through holes and jack up the mold, at the moment, a worker can manually push the mold to move along the sliding grooves, the position of the mold is limited through the side walls of the sliding grooves, in the process, rolling friction force borne by the mold is small, and therefore the mold can be protected.

This utility model provides a safety rope fixing device, belonging to the technical field of high-altitude operation safety protection equipment. This device, through the combination of a hollow slide rail and a spherical slider, and the design of a maintenance channel on the slide rail assembly, solves the problems of high friction during movement of the movable safety rope anchoring part in existing technologies, resulting in inflexible safety rope movement, inability to meet the needs of frequent anchor point movements, inconvenient maintenance, and increased risk of safety accidents. The device includes a slide rail assembly and a sliding module. The sliding module is slidably mounted on the slide rail assembly, and the safety rope is fixed to the sliding module. The slide rail assembly is composed of a hollow tube with a continuous groove along its length. The sliding module includes a spherical slider and a connecting part. The spherical slider is disposed inside the slide rail assembly, and its diameter is smaller than the inner diameter of the slide rail assembly but larger than the width of the groove. The connecting part connects the spherical slider and the safety rope. The slide rail assembly also has a maintenance channel, through which the spherical slider can be removed.