Turn-over driving device of vehicle-mounted flat-panel display

Abstract

The invention discloses a turn-over driving device of a vehicle-mounted flat-panel display and relates to an electric driving device for changing the supporting state of a display. The turn-over driving device of the vehicle-mounted flat-panel display is provided with a motor and a deceleration mechanism which comprises two rectangular box bodies and two worm gears and two worms. A rotating shaftof the first worm in the deceleration mechanism is a transverse input shaft, a rotating shaft of the second worm gear in the deceleration mechanism is a transverse output shaft, and the two shafts areparallel to each other. Longitudinal bearings are mounted on a lower straight rod part and an upper straight rod part of the two sides of an arc surface thread part of the second worm correspondingly, transverse bearings are mounted on a left circular rod part and a right circular rod part of the two sides of a working part on the second worm gear correspondingly, wherein the working part is provided with a plurality of arc surface tooth grooves along the circumference surface, and the arc surface thread part of the second worm is engaged with the arc surface tooth grooves of the second wormgear. The deceleration mechanism is provided with the two rectangular box bodies, the first worm and the first worm gear are mounted in the first box body, the second worm, the two longitudinal bearings of the second worm, the second worm gear and the two transverse bearings of the second worm gear are mounted in the second box body, and thus machining and production are facilitated.

Description

technical field [0001] The invention relates to an electric driving device for changing the supporting state of a display. Background technique [0002] The vehicle-mounted flat-panel display is usually installed at the position corresponding to the top of the compartment and the aisle. In order not to hinder the passengers from walking, the flat-panel display is usually turned upside down and placed in a horizontal state against the top of the compartment. When in use, the flat-panel display is turned upside down and turned into an upright state, which is convenient for passengers to watch programs. The flipping of the flat panel display is realized by an electric flipping drive. The vehicle-mounted flat-panel display must resist the impact of bumps and sudden brakes during vehicle driving, and the output shaft of its tilting drive device is required to withstand large impacts and effectively eliminate free clearance. In vehicle conditions, the size of the flip driving de...

AI Technical Summary

Problems solved by technology

[0004] There are following defects in the above-mentioned technical scheme: 1, on the casing 25, on two opposite sidewalls along the length direction, set up the first worm 4 (transverse input shaft) and the second worm wheel 7 (transverse output shaft) in parallel. Bearing holes, and a pair of longitudinal bearing holes of the second worm 6 are provided on the two opposite end walls perpendicular to the two shafts on the box body 25; these bearing holes on the box body 25 require high machining accuracy, and it is difficult for general equipment Commitment, need to use high-precision equipment such as machining center or coordinate boring machine, the processing cost of box 25 is high

2. The operation of the stepper motor is intermittent precession, and the operation noise is large

3. The diameter of the stepping motor is relatively large, resulting in a large thickness of the flip drive device of the entire vehicle-mounted flat-panel display, which is not suitable for the application trend of thinner overall thickness of the vehicle-mounted flat-panel display

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