CN219449109U

CN219449109U - Limiting mechanism for bridge crane railing door

Info

Publication number: CN219449109U
Application number: CN202320561687.0U
Authority: CN
Inventors: 郝华朝; 乔增农; 陈天浩; 任超朋; 杜黎明
Original assignee: Henan Mine Crane Co Ltd
Current assignee: Henan Mine Crane Co Ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-08-01
Anticipated expiration: 2033-03-21

Abstract

The utility model relates to the field of crane railing gates, in particular to a limiting mechanism for a bridge crane railing gate; the device is applied to a main beam of a crane, a walking platform is connected to the side part of the main beam, a railing is arranged outside the walking platform, a limiting mechanism is arranged between the side part of the main beam and the railing, the limiting mechanism comprises a connecting part and a limiting switch, the limiting switch is a plunger type limiting switch, one end of the connecting part is fixedly connected to the railing, the other end of the connecting part is fixedly connected with a sleeve, a mounting plate is fixedly connected to one side of the main beam, which is close to the railing, the limiting switch is horizontally arranged on the mounting plate, an insert for inserting the sleeve is arranged on the side part of the limiting switch, and when the sleeve is inserted into the insert, the sleeve is contacted with a plunger of the limiting switch; the lower part of the sleeve is of a conical structure, so that collision is reduced when the sleeve is in contact with the limit switch, and the limit switch is protected.

Description

Limiting mechanism for bridge crane railing door

Technical Field

The utility model relates to the field of crane railing gates, in particular to a limiting mechanism for a bridge crane railing gate.

Background

In the safety operation of the crane, when the crane does not work and when the crane overhauls, the whole crane needs to be powered off, so that in order to ensure the safety production, a railing door is generally arranged between a walking board of the crane and a railing, a limiting mechanism is arranged on the door, limit switches with rotating arm structures are used on many railing doors at present, and the rotating arms can not be contacted with the railing door at times due to the fact that the limit switches are inconvenient to install on the railing door and the length of the rotating arms can not be adjusted, so that the safety production requirement can not be met; the railing door is easy to shake open, and a locking mechanism is needed to be added to prevent the door from being opened; when overhauling, because vibrations also can lead to the mistake of railing door to close, cause the security risk.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a limiting mechanism for a railing door of a bridge crane.

The technical scheme of the utility model is realized as follows: the utility model provides a bridge crane railing stop gear for door, be applied to on the girder of hoist, the lateral part of girder is connected with walks the platform, the outside of walking the platform is provided with the railing, install stop gear between the lateral part of girder and the railing, stop gear includes connecting portion and limit switch, limit switch is plunger type limit switch, the one end fixed connection of connecting portion is on the railing, the other end fixedly connected with center of connecting portion is provided with the sleeve of through-hole, one side fixedly connected with mounting panel of girder and being close to the railing, limit switch level sets up on the mounting panel, and the lateral part that just is located limit switch is installed and is made sleeve male plug-in, when sleeve plug-in, sleeve contacts with limit switch's plunger.

The connecting part is of a strip-shaped structure.

The plunger rod of the limit switch is rotationally connected with a roller.

The lower part of the sleeve is of a conical structure.

The insert comprises a horizontal rod and a first vertical rod, one end of the horizontal rod is fixedly connected with the mounting plate, and the other end of the horizontal rod is fixedly connected with the first vertical rod.

A second vertical rod is fixedly connected to the horizontal rod of the insert and positioned on the side part of the first vertical rod; the first vertical rod is parallel to the second vertical rod.

The technical scheme of the utility model has the following positive effects: the access opening of the walking platform between the main beam and the railing is provided with the limiting mechanism, when the crane needs to be started, the sleeve is sleeved on the insert, so that the sleeve is contacted with the limiting switch, and the crane is electrified; the connecting part blocks the entrance and the exit, when a driver leaves the crane, the connecting part needs to be removed, so that the limit switch is normally closed, the crane is powered off, the safety protection effect is achieved, and the misoperation of the railing door cannot be caused due to vibration and the like; the plunger rod of the limit switch is rotationally connected with the roller, the lower part of the sleeve is of a conical structure, and the roller is in rolling contact with the sleeve in sequence from the lower part, so that the abrasion can be reduced, and the limit switch is protected; the insert is provided with a second vertical rod which is used for placing the sleeve, and the crane is also in a power-off state.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic front view of the connection of the mounting plate, limit switch and insert.

Fig. 3 is a schematic top view of the connection of the mounting plate, limit switch and insert.

Fig. 4 is a schematic view of the connection structure of the insert and the mounting plate.

Detailed Description

As shown in fig. 1-4, a limiting mechanism for a railing door of a bridge crane is applied to a girder 1 of the crane, a walking board 2 is connected to the side part of the girder 1, a railing 3 is arranged outside the walking board 2, a limiting mechanism is arranged between the side part of the girder 1 and the railing 3, the limiting mechanism comprises a connecting part 4 and a limiting switch 5, the limiting switch 5 is a plunger type limiting switch, one end of the connecting part 4 is fixedly connected to the railing 3, the other end of the connecting part 4 is fixedly connected with a sleeve 6 with a through hole in the center, a mounting plate 7 is fixedly connected to one side of the girder 1, which is close to the railing 3, the limiting switch 5 is horizontally arranged on the mounting plate 7, an insert 8 for inserting the sleeve 6 is arranged on the side part of the limiting switch 5, and when the sleeve 6 is inserted into the insert 8, the sleeve 6 is contacted with a plunger of the limiting switch 5; specifically, the crane driver needs to enter the cab from the walking board 2 of the main beam 1, when entering the walking board 2, the sleeve 6 needs to be inserted into the insert 8, the sleeve 6 props against the plunger of the limit switch 5 to electrify the whole crane, the connecting part 4 is in a horizontal state at the moment, the entrance of the walking board 2 is blocked, when the driver needs to leave, the connecting part 4 needs to be removed, the sleeve 6 needs to be taken off at the moment, the limit switch 5 cuts off the whole crane,

the connecting part 4 is of a strip-shaped structure; the chain can be used specifically and selectively, one end of the chain is welded on

The plunger rod of the limit switch 5 is rotationally connected with a roller 9; the lower part of the sleeve 6 is of a conical structure; when the sleeve 6 is inserted onto the insert 8, the sleeve 6 moves downwards, the roller 9 is in sliding contact with the sleeve 6, abrasion is reduced, and the limit switch 5 is protected.

The insert 8 comprises a horizontal rod 10 and a first vertical rod 11, wherein the end of the horizontal rod 10 is fixedly connected with the mounting plate, and the other end of the horizontal rod is fixedly connected with the first vertical rod 11; specifically, when the sleeve 6 is inserted into the vertical rod one 11, the sleeve 6 activates the limit switch.

A second vertical rod 12 is fixedly connected to the horizontal rod of the insert and positioned on the side part of the first vertical rod 11; the first vertical rod 11 and the second vertical rod 12 are parallel to each other; specifically, when the crane is not needed to be used, namely power is cut off, and a driver leaves the crane, the sleeve 6 is arranged on the second vertical rod 12, the limit switch 7 is not started, and the sleeve 6 is not required to be placed on the ground at will.

Claims

1. Limiting mechanism for bridge crane railing door is applied to the girder of hoist, and the lateral part of girder is connected with the walking board, and the outside of walking board is provided with railing, its characterized in that: install stop gear between lateral part and the railing of girder, stop gear includes connecting portion and limit switch, limit switch is plunger type limit switch, the one end fixed connection of connecting portion is on the railing, the other end fixedly connected with center of connecting portion is provided with the sleeve of through-hole, and one side fixedly connected with mounting panel on the girder and near the railing, limit switch level sets up on the mounting panel, and the lateral part that just is located limit switch is installed and is made sleeve male inserts, when sleeve inserts the inserts, sleeve contacts with limit switch's plunger.

2. The spacing mechanism for a bridge crane railing door as set forth in claim 1, wherein: the connecting part is of a strip-shaped structure.

3. The spacing mechanism for a bridge crane railing door as set forth in claim 1, wherein: the plunger rod of the limit switch is rotationally connected with a roller.

4. The spacing mechanism for a bridge crane railing door as set forth in claim 1, wherein: the lower part of the sleeve is of a conical structure.

5. The spacing mechanism for a bridge crane railing door as set forth in claim 1, wherein: the insert comprises a horizontal rod and a first vertical rod, one end of the horizontal rod is fixedly connected with the mounting plate, and the other end of the horizontal rod is fixedly connected with the first vertical rod.

6. The spacing mechanism for a bridge crane railing door as set forth in claim 1, wherein: a second vertical rod is fixedly connected to the horizontal rod of the insert and positioned on the side part of the first vertical rod; the first vertical rod is parallel to the second vertical rod.