Patent ID: 12195307

DESCRIPTION OF REFERENCE NUMBERS

1. Contact detection unit;101. Tube;102. Metal probe;103. Bevel ring;104. Top pipe;105. Directional ring I;106. Directional ring II;107. Resetting spring;108. Limiting bolt;2. Common end roller unit;201. Support roller;202. Axle;203. Rolling bearing;204. Nut;205. Gasket;206. Circlip;207. Key;3. Idling time detection unit;4. Detection line;5. Brake shoe;6. Brake lever;7. Travelling track;8. Frame.

DESCRIPTION OF EMBODIMENTS

The following clearly and completely describes the technical solutions in embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. It will be apparent that the described embodiments are merely some but not all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative effects shall fall within the protection scope of the present disclosure.

As illustrated inFIG.1toFIG.3, provided is a device for detecting idling time of a brake shoe of a monorail hoist. The device includes a contact detection unit1, a common end roller unit2, an idling time detection unit3, and detection lines4.

The contact detection unit1includes a tube101, a metal probe102, a bevel ring103, a top pipe104, a directional ring I105, a directional ring II106, a resetting spring107and a limiting bolt108. An outer surface of the tube101is provide with external threads matchedly installed with the brake shoe5. A bottom part of the tube101is provided with a circular hole. A side face of the tube101is provided with a threaded hole1configured to install the limiting bolt108. The bevel ring103is installed inside the tube101. The directional ring I105is coaxially fixedly installed inside the bevel ring103. One end of the bevel ring103approximate to the limiting bolt108is provided with a bevel hole, and one end of the bevel ring103away from the limiting bolt108is provided with a threaded hole2. A bottom part of the top pipe104is provided with an external thread, which is connected with the threaded hole2of the bevel ring103through the external thread. The top part of the top pipe104is flushed with an end face of the brake shoe5approximate to the travelling track7. The directional ring II106is coaxially fixedly installed inside the top pipe104. A raised cylindrical block is arranged at a middle part of the metal probe102. A ring bevel matched with a bevel hole on the inclined ring103is arranged on the raised cylindrical block. One end of the metal probe102approximate to the limiting bolt18is sleeved with a resetting spring107, and another end of the metal probe102away from the limiting bolt18is passed through the directional ring I105and the directional ring II103in sequence. The resetting spring107is in contact with the bottom part of the tube101and the raised cylindrical block of the metal probe102respectively. The ring bevel on the raised cylindrical block of the metal probe102is tightly pressed into the bevel hole on the bevel ring13under the action of the resetting ring107. The metal probe102is passed through the directional ring I105and one end of the directional ring II106to protrude outside the brake shoe5, and the limiting bolt108is installed inside the threaded hole on the side face of the tube101.

The common end roller unit2includes a support roller201, an axle202, a rolling bearing203, a connecting nut204, a gasket205, a circlip206and a key207. The support roller201is installed on the travelling track7. The rolling bearing203is installed inside the support roller201. One end of the axle202approximate to the support roller201is connected with the rolling bearing203through the circlip206, and another end of the axle202away from the support roller201is passed through the frame8and is locked and fixed with the frame8through the gasket205and the bolt204. A keyway is arranged at a middle part of the axle202, and the middle part of the axle202is fixed with the frame8through the key207.

The idling time detection unit3is connected with the metal probe102, the axle202and the limiting bolt18through detection lines18, respectively.

A frictional coefficient between the bevel ring103and the inner wall of the tube101is greater than a tangent value for an angle between a bevel of the bevel ring103and a horizontal plan.

The materials of the tube101, the bevel ring103and the top pipe104are hard insulating materials well-known to those skilled in the art.

The detection lines4connected with the metal probe102passes through the circular hole at a bottom part of the tube101.

The detection lines4connected with the limiting bolt108passes through the circular hole at a bottom part of the tube101.

The distance between the center line of the limiting bolt108and the end face of the raised cylindrical block on the metal probe102approximate to the limiting bolt108ranges from 11 mm to 12 mm.

The installed limiting bolt108is not protruded from the outer surface of the tube101.

One end of the metal probe102passing through the directional ring I105and the directional ring II106are protruded from the surface of the brake shoe5by 1 mm to 2 mm.

Redundant common end roller units are provided in this embodiment, which improves the reliability of the detection.

The brake shoe5of this embodiment is connected with a brake lever6.

The rolling bearing203on the common end roller unit2adopts a deep groove ball bearing made of a high carbon chromium material.

The contact detection unit1, the tube101, the metal probe102, the bevel ring103, the top pipe104, the directional ring I105, the directional ring II106, the resetting spring107, the limiting bolt108, the common end roller unit2, the support roller201, the axle202, the rolling bearing203, the nut204, the gasket205, the circlip206, the key207, the idling time detection unit3, the detection line4, the brake shoe5, the brake lever6, the travelling track7, and the frame8provided in this embodiment adopts the existing products or structures well-known to those skilled in the art, and the connection modes among them also adopts the existing connection modes well-known to those skilled in the art, which are not described in detail herein.

Detecting the idling time of the monorail hoist by utilizing the above device includes the following steps.a) A contact detection unit1is installed on each brake shoe5of the monorail hoist respectively, a common end roller unit2is installed on a frame8, and a wiring between the contact detection unit1, the common end roller unit2and an idling time detection unit3is completed.b) When a braking command is issued by the monorail hoist, a current time t0is recorded by the idling time detection unit3.c) A signal is contacted by the idling time detection unit3and a current time t is recorded by the idling time detection unit3, after a metal probe102contacts a travelling track7.d) The idling time is calculated by the idling time detection unit3, and the calculation formula is Δt=t−t0.e) When the idling time detection unit3detects braking idling time Δt≥700 ms of a brake, an alarm is sent by the idling time detection unit3to remind that the brake is abnormal and required to be repaired immediately.f) When the idling time detection unit3detects a contact signal between a limiting bolt108of the brake and the metal probe102, an alarm is sent by the idling time detection unit3to remind that the abrasion loss of the brake shoe is excessive large and the brake shoe is required to be replaced in time.g) Step (b) to Step (f) are repeated after the monorail hoist completes the braking.

It will be apparent that various modifications and variations can be made by those skilled in the art in the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure belong to the scopes of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.