4results about How to "Stable bottom" patented technology

The utility model discloses a wear-resistant copper alloy contact line structure for rigid suspension of a subway, which comprises a contact line body, and the section of the contact line body is of a flat calabash-shaped structure in bilateral symmetry. Grooves are formed in the two sides of the contact line body, and the upper portion and the lower portion of the contact line body are in transition connection through the grooves. The upper part of the contact line body is used for clamping a busbar, and the lower part is used as a working surface of the contact line and is contacted with a pantograph carbon slide plate to take electricity; the upper portion of the contact line body is composed of a first arc surface with the radius R1, and two identification grooves are formed in the first arc surface in a bilateral symmetry mode. The lower part of the contact line body is composed of two second arc surfaces with radiuses R2 and a third arc surface with a radius R3; r3 > R2 > = R1. The contact line structure is a flat contact line structure, the curvature radius of the large arc surface is increased, the bottom of the contact line is smoother, the contact surface between the contact line and the pantograph is increased, the pressure intensity between the pantograph and the contact line is reduced, and mechanical abrasion is relieved.

The utility model discloses a movable sound equipment rack for performance, comprising a sound equipment rack unit which comprises a base and four groups of universal wheels fixedly installed at the corners of the bottom of the base, a support frame is fixedly installed at the axis of the top of the base, and a support plate is fixedly installed at one end, far away from the base, of the support frame; the sound box frame unit further comprises a clamping assembly used for fixing the sound box. The two groups of racks move to drive the balancing weights to unfold towards two sides, the balancing weights unfold towards the two sides, so that the gravity center of the device is distributed more uniformly, the bottom of the sound equipment frame is more stable, the bottom of the sound equipment frame is integrally reinforced, and the situation that the playing effect is poor due to the fact that the sound equipment is blown by generated wind power to shake left and right is avoided; and meanwhile, the main body can be automatically reinforced, and a counterweight device does not need to be manually carried for reinforcement, so that the reinforcement process is more time-saving and labor-saving.

The utility model relates to the technical field of network transmission equipment, and discloses an audio and video signal network transmitter, which comprises a dustproof shell, a network transmitter main body is slidably connected in the dustproof shell, a pop-up spring is fixedly connected on the network transmitter main body, one end of the pop-up spring is fixedly connected in the dustproof shell, and the other end of the pop-up spring is fixedly connected in the dustproof shell. A sliding groove is formed in the dustproof shell. According to the network transmitter, audio and video signal transmission lines which are not used temporarily can be wound on the take-up blocks in front of the corresponding sockets by rotating the cranks, so that the transmission lines are convenient to store and take during use, the signal transmission lines are prevented from being lost, and the network transmitter main body can be pushed into the dustproof shell by shifting the control column; through cooperation of the control column and the wedge block, the network transmitter main body is limited in the dustproof shell, external dust is prevented from falling on the network transmitter main body or the interface to affect the service life of the network transmitter main body, and some unnecessary cleaning work is avoided.

The utility model provides a mutual inductor shell protection device relates to mutual inductor shell protection technical field, including the protection cover main part, the bottom fixed connection of protection cover main part has the extension frame, the bottom fixed connection of extension frame has the clamping frame, the one side fixed connection of clamping frame has the support block, the one side of support block has set up first mobile slot, the inner wall movable joint of first mobile slot has the limit post, the one side of first mobile slot has the second mobile slot and has set up, this utility model, through setting up clamping frame, prolongs the height of protection cover main part, makes clamping frame can be clamped in the outer ring of mutual inductor surface disc, through setting up support block, it is convenient to set up limit post in its inside, makes limit post can be clamped in the bottom of disc, to be more convenient for the protection cover main part to separate installation auxiliary pole also can make the bottom of protection cover main part more stable, reduces the shake, through setting up first mobile slot, makes limit post move in its inside.