4results about "Current collector maintenance" patented technology

The present application relates to the field of rail transit vehicle carbon brush technology, in particular to a rail transit grounding carbon brush device based on high-purity rare earth and graphite compound and a method thereof, comprising a grounding device, the grounding device comprising a brush holder, a pre-tightening piece arranged inside the brush holder and used for applying a pre-tightening force to the graphite carbon brush, a connecting piece connected to the bottom of the pre-tightening piece, and an electromagnetic driving piece used for regulating the pre-tightening force intensity of the pre-tightening piece through the connecting piece. The present application regulates the compression of the pressing plate on the first spring by constructing the linkage compensation structure of the electromagnetic driving piece, the connecting piece and the pre-tightening piece, so as to realize the automatic compensation of the pre-tightening force. The structure makes the contact pressure of the graphite carbon brush stable after wear, and avoids the poor conduction caused by insufficient pressure.

To provide a brush and a brush holder assembly for use in electrical equipment and / or slip ring assembly.SOLUTION: A brush assembly 45 includes a carbon brush 14, a first lead wire 46, a second lead wire 44a, a third lead wire 44b, and a terminal 42. The first end region of the first lead wire 46 is joined to the first end region of the second lead wire 44a at a splice joint 50, and the second end region of the first lead wire 46 is joined to the first end region of the third lead wire 44b at the splice joint 50. The second end region of the second lead wire 44a and the second end region of the third lead wire 44b are joined to the carbon brush 14. The splice joint 50 is located between the terminal 42 and the carbon brush 14, and is spaced apart from both the terminal 42 and the carbon brush 14.SELECTED DRAWING: Figure 3

The invention provides a carbon brush automatic centering device based on a temperature control air column and an operation method, and belongs to the technical field of motor collector rings. According to the device, an existing brush box is improved, an original constant-pressure spring is removed, five air columns are arranged at the bottom of the brush box, four air columns are distributed diagonally, and one air column is arranged in the middle. Each air column consists of an air sleeve, an air chamber and a piston rod, and the air chamber is filled with air; the top end of the piston rod is connected with a spring base, and a spring is installed between the spring base and a spring upper end seat, so that the springs of the five air columns act on the carbon brush together. The brush box is parallel to the collector ring, and the distance between the brush box and the collector ring is adjusted by rotating the hand frame, thereby ensuring that the carbon brush in the brush box is attached to the side surface of the collector ring. When the carbon brush deviates, the spring at the corresponding position can be stretched or compressed, and the deformation of the spring is the direct reflection of the deviation. By controlling the temperature of air in each air column, the volume of the air chamber is changed by utilizing the thermal expansion and cold contraction characteristics of air, and the piston rod is driven to stretch.

A method for producing a shaft grounding ring includes providing a shaft grounding ring having an annular main body and contact elements arranged on the main body. The contact elements are electrically conductive and plastic-based. The contact elements are configured to establish an electrically conductive sliding contact with a circumferential surface of a shaft or of a sleeve placed onto the shaft. The contact elements are elastically bendable such that the contact elements are configured to preload the electrically conductive sliding contact. Additionally, the method includes thermally preconditioning the shaft grounding ring before use.