Coach passenger door unloading type-electric door pump device

Abstract

The invention relates to an unloading-type electric gantry pump device for passenger carriage door, comprising electric machine, unloading mechanism and spiral reducing mechanism, and characterized in that: a small-lead input screw connected with the electric machine engages with a bottom push pipe externally provided with spline and internally provided with nut; a top push pipe provided with large-lead thread engages with the nut of an output sleeve; an unloading spring is arranged between fixed outer sleeve and output sleeve; steel balls and slide blocks for controlling engaging and disengaging are arranged in the top and bottom push pipes. And it can save energy and damp vibration, and its shape is a small-diameter round pipe, and it has small bulk, simple structure, novel style, beautiful appearance, complete functions, and operating convenience, applied to various carriage doors.

Description

technical field [0001] The invention relates to an electric door pump for various passenger doors of large, medium and small passenger cars. Specifically, the utility model relates to an unloading electric door pump device for a passenger door of a passenger car, which belongs to the technical field of passenger cars. Background technique [0002] At present, more advanced passenger doors of passenger cars mostly use lift-and-lock pneumatic swing door pump devices. It is mainly composed of a cylinder, a multi-head ball screw, an overload clutch, a telescopic slewing mechanism and a control circuit. But it exposes the following problems in use: 1. Poor reliability. When the passenger car is parked for a long time, especially in the cold winter, when the temperature is low, the air circuit or pneumatic components will leak, resulting in a decrease in air pressure and the door cannot be closed. For example, some buses to Guangzhou, Shanghai and other places in winter cannot ...

AI Technical Summary

Problems solved by technology

But it exposes the following problems in use: 1. Poor reliability

2. Many faults

Since the door pump is driven by the circuit control air circuit, when the circuit or the air circuit fails, it will cause abnormal working conditions.

3. The emergency button is also controlled by the circuit. When the circuit is burned, the emergency button cannot be activated, which will lead to unimaginable consequences.

4. Solenoid valve is easy to heat and burn out the coil

5. Gas emissions are noisy, leading to environmental pollution

6. The volume is large, occupying a large space on the steps in the car, and the style is not beautiful

7. There are many and complex parts, fragile and difficult to maintain

The main problems are: 1. The gear reducer has a complex structure and many parts

2. Large size

3. The style is not beautiful

4. No load shedding device, high energy consumption and low efficiency

5. The emergency mechanism is laborious to operate manually

6. In addition to the reducer, there is another lifting and locking device, which has many mechanisms and high cost

7. The coupling process is complex

The applicant's new passenger car passenger door electric door pump device also has certain defects in terms of energy consumption and installation difficulty because there is no unloading mechanism and movable coupling

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