Upper limit interlocking device of electric hoist

Abstract

The utility model discloses an upper limit interlocking device of an electric hoist in the technical field of hoisting equipment, which comprises an electric hoist lifting appliance, 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. And an infrared detection assembly is arranged above the lifting hook and is electrically connected with the motor control switch. And a detection triggering assembly matched with the infrared detection assembly is arranged below the electric hoist lifting appliance. The infrared detection assembly comprises an infrared transmitter and an infrared receiver, and a detection area is arranged between the infrared transmitter and the infrared receiver. The detection triggering assembly comprises a fixing rod and a shielding block, the fixing rod is vertically fixed to the electric hoist lifting appliance, and the shielding block is installed at the lower end of the fixing rod. The device is simple in structure, the position of the lifting hook is detected and positioned through infrared rays, accurate upper limiting control is achieved, collision accidents are effectively avoided, and safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to an upper limit interlocking device for an electric hoist. Background Technology

[0002] Electric hoists, as a common lifting device, are widely used in industrial and mining enterprises, warehouses, docks, and other places, and have advantages such as small size, light weight, simple operation, and ease of use. However, during the hoisting and lifting process, an upper limit interlock must be set to ensure that the operation stops at the highest limit to avoid collision accidents. However, the existing upper limit interlock mechanisms have problems such as complex structure, high cost, and inconvenient maintenance, which to some extent limits their application and promotion. Utility Model Content

[0003] The main objective of this invention is to provide an upper limit interlocking device for an electric hoist, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An upper limit interlocking device for an electric hoist includes an electric hoist lifting device with a lifting rope attached to it and a hook at the lower end of the rope. An infrared detection component is located above the hook and is electrically connected to a motor control switch. A detection triggering component that cooperates with the infrared detection component is located below the electric hoist lifting device.

[0006] The infrared detection assembly includes a first mounting frame, a second mounting frame, an infrared transmitter, and an infrared receiver. The first and second mounting frames are symmetrically arranged vertically on both sides of the support frame of the hook. The infrared transmitter and infrared receiver, which cooperate with each other, are respectively installed on the inner side of the first and second mounting frames.

[0007] The detection triggering component includes a fixed rod and a blocking block. The fixed rod is vertically fixed to the electric hoist lifting device, and the blocking block is installed at the lower end of the fixed rod.

[0008] Furthermore, a horizontal limiting plate is fixed to the lower end of the fixed rod, and a first through hole and a second through hole are respectively opened on both sides of the limiting plate. The moving end of the lifting rope slides through the first through hole, and the fixed end of the lifting rope slides through the second through hole.

[0009] Furthermore, the area between the infrared transmitter and the infrared receiver is a detection zone. The infrared detection component rises with the hook, and a blocking block is positioned directly above the detection zone.

[0010] This utility model also includes other components that enable the upper limit interlock device of the electric hoist to function normally. These devices or components all employ conventional techniques in the art. Furthermore, devices and components not specified in this utility model all employ conventional techniques in the art, such as the infrared transmitter and infrared receiver mentioned in this application. In specific implementation, appropriate device or component models can be selected according to the specific working scenario.

[0011] The working principle of this invention is as follows: When the electric hoist lifting device raises the hook, the infrared detection component connected to the hook also rises accordingly. The blocking block in the detection trigger component installed below the electric hoist lifting device is located directly above the detection area between the infrared transmitter and receiver. As the hook continues to rise, the blocking block passively enters the detection area between the infrared transmitter and receiver, preventing the infrared receiver from receiving the signal emitted by the infrared transmitter. At this time, the motor control switch electrically connected to the infrared detection component receives an electrical signal and immediately controls the motor in the electric hoist lifting device to stop working, thereby achieving the upper limit position.

[0012] Meanwhile, the first and second through holes on both sides of the limiting plate at the lower end of the fixed rod limit the moving and fixed ends of the lifting rope, respectively, ensuring that the infrared detection component can better cooperate with the detection trigger component when the hook approaches the detection trigger component, effectively avoiding the failure of the upper limit.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Simplified structure and reduced cost: The existing complex interlocking mechanism is abandoned, and infrared detection components and detection triggering components are used together to reduce the number of parts, making the structure simpler, easier to design and manufacture, and reducing production costs.

[0015] 2. Enhanced safety and precision: Effectively avoids collisions caused by upper limit switch failure, ensuring safety and reducing risks; accurately detects the hook position through infrared detection components, achieving more precise upper limit control and improving the operating accuracy and control performance of the electric hoist. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a side view of the infrared detection component of this utility model.

[0018] Figure 3 This is a top view of the limiting plate of this utility model.

[0019] In the diagram: 1. Electric hoist lifting device; 2. Lifting rope; 3. Hook; 4. First mounting frame; 5. Second mounting frame; 6. Moving rope end; 7. Fixed rope end; 8. Infrared transmitter; 9. Infrared receiver; 10. Detection area; 11. Fixing rod; 12. Blocking block; 13. Limiting plate; 14. First through hole; 15. Second through hole. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Example:

[0022] like Figures 1-3 As shown, an upper limit interlocking device for an electric hoist includes an electric hoist lifting device 1, a lifting rope 2 on the lifting device 1, and a hook 3 at the lower end of the lifting rope 2. An infrared detection component is located above the hook 3 and is electrically connected to a motor control switch. A detection trigger component that cooperates with the infrared detection component is located below the electric hoist lifting device 1.

[0023] Specifically, the infrared detection assembly includes a first mounting bracket 4, a second mounting bracket 5, an infrared transmitter 8, and an infrared receiver 9. The support frame of the hook 3 is symmetrically provided with the first mounting bracket 4 and the second mounting bracket 5, which are vertically mounted upwards. The infrared transmitter 8 and the infrared receiver 9, which cooperate with each other, are respectively mounted inside the first mounting bracket 4 and the second mounting bracket 5. The detection trigger assembly includes a fixing rod 11 and a blocking block 12. The fixing rod 11 is vertically fixed to the electric hoist lifting device 1, and the blocking block 12 is installed at the lower end of the fixing rod 11.

[0024] The detection area 10 is located between the infrared transmitter 8 and the infrared receiver 9. The infrared detection component rises with the hook 3, and the blocking block 12 is positioned directly above the detection area 10.

[0025] In addition, a horizontal limiting plate 13 is fixed to the lower end of the fixed rod 11, and a first through hole 14 and a second through hole 15 are respectively opened on both sides of the limiting plate 13. The moving rope end 6 of the hoisting rope 2 slides through the first through hole 14, and the fixed rope end 7 of the hoisting rope 2 slides through the second through hole 15.

[0026] The working principle of this electric hoist upper limit interlocking device is as follows: When the electric hoist lifting device 1 drives the hook 3 to rise, the infrared detection component connected to the hook 3 also rises accordingly. The blocking block 12 in the detection triggering component installed below the electric hoist lifting device 1 is located directly above the detection area 10 between the infrared transmitter 8 and the infrared receiver 9. As the hook 3 continues to rise, the blocking block 12 passively enters the detection area 10 between the infrared transmitter 8 and the infrared receiver 9, preventing the infrared receiver 9 from receiving the signal emitted by the infrared transmitter 8. At this time, the motor control switch electrically connected to the infrared detection component receives an electrical signal and immediately controls the motor in the electric hoist lifting device 1 to stop working, thereby achieving the purpose of upper limit control.

[0027] Meanwhile, the first through hole 14 and the second through hole 15 on both sides of the limiting plate 13 at the lower end of the fixed rod 11 limit the moving rope end 6 and the fixed rope end 7 of the hoisting rope 2 respectively, ensuring that when the hook 3 approaches the detection trigger component, the infrared detection component can better cooperate with the detection trigger component, effectively avoiding the occurrence of upper limit failure.

[0028] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope of the present utility model.

Claims

1. An upper limit interlocking device for an electric hoist, comprising an electric hoist lifting device (1), wherein the electric hoist lifting device (1) is provided with a lifting rope (2), and the lower end of the lifting rope (2) is provided with a hook (3), characterized in that: An infrared detection component is provided above the hook (3), and the infrared detection component is electrically connected to the motor control switch; a detection trigger component that cooperates with the infrared detection component is provided below the electric hoist lifting device (1); the infrared detection component includes a first mounting frame (4), a second mounting frame (5), an infrared transmitter (8) and an infrared receiver (9), and the support frame of the hook (3) is symmetrically provided with a first mounting frame (4) and a second mounting frame (5) installed vertically upward on both sides, and an infrared transmitter (8) and an infrared receiver (9) that cooperate with each other are respectively installed on the inner side of the first mounting frame (4) and the second mounting frame (5); the detection trigger component includes a fixing rod (11) and a blocking block (12), the fixing rod (11) is vertically fixed on the electric hoist lifting device (1), and a blocking block (12) is installed at the lower end of the fixing rod (11).

2. The upper limit interlocking device for an electric hoist according to claim 1, characterized in that: The lower end of the fixed rod (11) is fixed with a horizontal limiting plate (13). The limiting plate (13) has a first through hole (14) and a second through hole (15) on both sides respectively. The moving end (6) of the hoisting rope (2) slides through the first through hole (14), and the fixed end (7) of the hoisting rope (2) slides through the second through hole (15).

3. The upper limit interlocking device for an electric hoist according to claim 1, characterized in that: The detection area (10) is located between the infrared transmitter (8) and the infrared receiver (9). The infrared detection component rises with the hook (3), and the blocking block (12) is positioned directly above the detection area (10).

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