CN-224226478-U - Upper limit interlocking device of electric hoist

CN224226478UCN 224226478 UCN224226478 UCN 224226478UCN-224226478-U

Abstract

The utility model discloses an upper limit interlocking device of an electric hoist, which belongs to the technical field of hoisting equipment. An infrared detection component is arranged above the lifting hook and is electrically connected with the motor control switch. And a detection trigger component matched with the infrared detection component is arranged below the electric hoist lifting appliance. The infrared detection assembly comprises an infrared emitter and an infrared receiver, and a detection area is arranged between the infrared emitter and the infrared receiver. The detection triggering assembly comprises a fixed rod and a shielding block, the fixed rod is vertically fixed on the electric hoist lifting appliance, and the shielding block is arranged at the lower end of the fixed rod. The utility model has simple structure, realizes accurate upper limit control by infrared detection and positioning of the position of the lifting hook, effectively avoids collision accidents and ensures safety.

Inventors

ZHAN BAITAO
GUAN SENSEN
Liu Baofei

Assignees

焦作健康元生物制品有限公司

Dates

Publication Date: 20260512
Application Date: 20250519

Claims (3)

1. The upper limit interlocking device of the electric hoist comprises an electric hoist lifting appliance (1), wherein a lifting rope (2) is arranged on the electric hoist lifting appliance (1), a lifting hook (3) is arranged at the lower end of the lifting rope (2), the upper limit interlocking device is characterized in that an infrared detection assembly is arranged above the lifting hook (3), the infrared detection assembly is electrically connected with a motor control switch, a detection triggering assembly matched with the infrared detection assembly is arranged below the electric hoist lifting appliance (1), the infrared detection assembly comprises a first mounting frame (4), a second mounting frame (5), an infrared emitter (8) and an infrared receiver (9), the first mounting frame (4) and the second mounting frame (5) which are vertically and upwards installed are symmetrically arranged on two sides of a supporting frame of the lifting hook (3), the infrared emitter (8) and the infrared receiver (9) which are matched with each other are respectively installed on the inner sides of the first mounting frame (4) and the second mounting frame (5), the detection triggering assembly comprises a fixing rod (11) and a shielding block (12), the fixing rod (11) is vertically fixed on the electric hoist (1), and a stop block (12) is installed at the lower end of the fixing rod (11).
2. The upper limit interlocking device of the electric hoist according to claim 1 is characterized in that a horizontal limit plate (13) is fixed at the lower end of the fixed rod (11), a first through hole (14) and a second through hole (15) are respectively formed in two sides of the limit plate (13), a movable rope end (6) of the lifting rope (2) slides through the first through hole (14), and a rope fixing end (7) of the lifting rope (2) slides through the second through hole (15).
3. The upper limit interlocking device of the electric hoist according to claim 1, wherein a detection area (10) is arranged between the infrared emitter (8) and the infrared receiver (9), the infrared detection assembly ascends along with the lifting hook (3), and the shielding block (12) is arranged right above the detection area (10).

Description

Upper limit interlocking device of electric hoist Technical Field The utility model relates to the technical field of hoisting equipment, in particular to an upper limit interlocking device of an electric hoist. Background The electric hoist is used as common hoisting equipment, is widely applied to industrial and mining enterprises, storage, wharfs and other places, and has the advantages of small volume, light dead weight, simplicity in operation, convenience in use and the like. However, during the lifting operation of the crane, an upper limit interlock must be set to ensure that the highest limit stops operating, avoiding a collision accident. However, the upper limit interlocking mechanism in the prior art has the problems of complex structure, high cost, inconvenient maintenance and the like, and the application and popularization of the upper limit interlocking mechanism are limited to a certain extent. Disclosure of utility model The utility model mainly aims to provide an upper limit interlocking device of an electric hoist, which is used for solving the problems in the background technology. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: An upper limit interlocking device of an electric hoist comprises an electric hoist lifting appliance, wherein a lifting rope is arranged on the electric hoist lifting appliance, and a lifting hook is arranged at the lower end of the lifting rope. An infrared detection component is arranged above the lifting hook and is electrically connected with the motor control switch. And a detection trigger component matched with the infrared detection component is arranged below the electric hoist lifting appliance. The infrared detection assembly comprises a first installation frame, a second installation frame, an infrared emitter and an infrared receiver, wherein the first installation frame and the second installation frame which are vertically installed upwards are symmetrically arranged on two sides of a supporting frame of the lifting hook, and the infrared emitter and the infrared receiver which are matched with each other are respectively installed on the inner sides of the first installation frame and the second installation frame. The detection triggering assembly comprises a fixed rod and a shielding block, the fixed rod is vertically fixed on the electric hoist lifting appliance, and the shielding block is arranged at the lower end of the fixed rod. Further, the lower end of the fixing rod is fixedly provided with a horizontal limiting plate, and a first through hole and a second through hole are respectively formed in two sides of the limiting plate. The movable rope end of the lifting rope slides through the first through hole, and the fixed rope end of the lifting rope slides through the second through hole. Further, a detection area is arranged between the infrared emitter and the infrared receiver, the infrared detection assembly ascends along with the lifting hook, and the shielding block is arranged right above the detection area. The utility model also comprises other components which can normally use the upper limit interlocking device of the electric hoist, and the equipment or the components all adopt the conventional technical means in the field. In addition, the devices and components not defined in the present utility model are all conventional in the art, such as infrared emitters, infrared receivers, etc. in the present utility model. In the implementation process, a proper equipment or component model can be selected according to a specific working scene. The utility model has the working principle that when the lifting hook is driven to rise by the electric hoist lifting appliance, the infrared detection component connected with the lifting hook also rises along with the lifting hook. The shielding block arranged in the detection triggering assembly below the electric hoist lifting appliance is positioned right above the detection area between the infrared emitter and the infrared receiver. As the hook continues to rise, the shielding block passively enters a detection area between the infrared emitter and the infrared receiver, so that the infrared receiver cannot receive signals sent by the infrared emitter. At this time, the motor control switch electrically connected with the infrared detection assembly receives the electric signal and then controls the motor in the electric hoist lifting appliance to stop working, thereby achieving the purpose of upper limit. Simultaneously, first through-hole and the second through-hole of seting up of limiting plate both sides of dead lever lower extreme are spacing to the rope end of moving of lifting rope and decide the rope end respectively, when guaranteeing that the lifting hook is close to detecting the trigger assembly, and infrared detection assembly can cooperate better with detecting the trigger assembly, effectively avoids the conditio