Height limiting stopper of electric hoist

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By using protective shell and thermal insulation material in the electric hoist's height stop limiter, combined with the design of rope ring and buffer roller, buffer frame and anti-slip rubber wheel, the limiter failure due to high temperature in harsh environments is solved. The problem is that the stability of the hook movement and the service life of the equipment are improved.

CN222498510UActive Publication Date: 2025-02-18SHANXI HUAJIN NEW MATERIAL TECH CO LTD

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Patent Information

Application Number: CN202421361118.2
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-14
Publication Date: 2025-02-18
Estimated Expiration: 2034-06-14

AI Technical Summary

Technical Problem

The height stop limiter of existing electric hoists is easily affected by high temperature in harsh production environments, resulting in electrical failures and damage to the hooks, affecting normal operation and reducing practicality.

Method used

An electric hoist height stop limiter is designed, using protective shell and thermal insulation material, which drives the connecting contact point to contact the linkage conductor through the support column, transmits signals and adjusts the hook movement, and reduces friction between the rope ring and the buffer roller. The buffer frame and the anti-slip adhesive wheel are in contact and cushion to prevent the hook from being offset.

Benefits of technology

It effectively reduces the impact of high temperature on the limiter, improves the stability of the hook movement, extends the service life of the limiter, and improves the normality and practicality of the work.

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Abstract

The utility model discloses an electric hoist height limiting stopper which comprises an electric hoist body, the electric hoist body is connected with a lifting hook through a lifting rope, the lower surface of one end of the electric hoist body is connected with a connecting frame in a sliding mode, one end of the connecting frame is fixedly connected with a rope guide ring, and an opening is formed in the surface of the rope guide ring. And the inner wall of the opening of the rope guide ring is rotationally connected with two buffer rollers. According to the height-stopping limiter for the electric hoist, the protective shell and the supporting columns are arranged, contact buffering is conducted on a rising lifting hook through the supporting columns and the buffering frame, impact force is reduced through springs above the buffering frame, meanwhile, the buffering frame makes contact with the lifting hook through anti-skid rubber wheels to prevent the lifting hook from shifting, and the movement stability of the lifting hook is improved; and then the connecting contact is driven by the supporting column to make contact with the linkage conductor, so that the linkage conductor transmits a signal to a controller of the electric hoist body through a wire for adjustment, and the influence of high temperature on the device is reduced through a heat insulation material of the protective shell.

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Description

Technical Field

[0001] The utility model relates to the technical field of electric hoist limiters, in particular to an electric hoist height limiter. Background Art

[0002] Electric hoist is a special lifting equipment installed on overhead crane and gantry crane. Electric hoist has the characteristics of small size, light weight, simple operation and easy use. It is used in industrial and mining enterprises, warehouses, docks and other places. The electric hoist has a compact structure, and the motor axis is perpendicular to the drum axis. The electric hoist adopts a worm gear transmission device. Its disadvantages are: large length and width, bulky structure, low mechanical efficiency, difficult processing, etc. The hydraulic system is dual-controlled, and the overflow regulating valve and magnetic contact pressure gauge can accurately control the pressure. The electrical control department adopts low voltage control to increase the safety of the control system. It consists of an electric motor, a transmission mechanism and a drum or sprocket, and is divided into two types: wire rope electric hoist and chain electric hoist.

[0003] The height limiter used in the electric hoist in the prior art is a heavy hammer type and a rope guide. When used in factories with harsh production environments, the limiter is easily affected by high temperatures, which often causes the electrical appliances of the limiter to malfunction, resulting in damage to the limiter during the rising process of the hook, thereby affecting the normal work and reducing practicality. Utility Model Content

[0004] The purpose of the utility model is to provide an electric hoist height limiter to solve the problem raised in the above background technology that when used in some factories with harsh production environments, the limiter is easily affected by high temperature, causing the electrical appliances of the limiter to malfunction frequently, resulting in damage to the limiter during the rising process of the hook, thereby affecting the normal work and reducing the practicality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric hoist height limiter, comprising an electric hoist body, which is connected to a hook through a lifting rope, the lower surface of one end of the electric hoist body is slidably connected to a connecting frame, and one end of the connecting frame is fixedly connected to a guide rope ring, the surface of the guide rope ring is provided with an opening, and the inner wall of the guide rope ring opening is rotatably connected to two buffer rollers, the lower surface of the electric hoist body is fixedly connected to a protective shell, the lower surface of the protective shell is provided with an opening, and the inner wall of the protective shell opening is slidably connected to a support column, the lower surface of the support column is installed with a buffer frame, the lower surface of the buffer frame is rotatably connected to an anti-slip rubber wheel, the upper surface of the support column is fixedly provided with a connecting contact, and the lower surface of the electric hoist body is provided with a linkage conductor.

[0006] Preferably, a spring is connected between the connecting frame and the electric hoist body, the opening of the guide rope ring is penetrated by the suspension rope of the electric hoist body, and the buffer roller is symmetrically arranged about the center of the guide rope ring.

[0007] By adopting the above technical solution, through the spring between the connecting frame and the electric hoist body, the guide rope ring can be driven to slide along with the connecting frame for buffering.

[0008] Preferably, a spring is connected between the protective shell and the buffer frame, and the lower surface of the buffer frame is designed to be arc-shaped.

[0009] By adopting the above technical solution, the protective shell and the spring of the buffer frame can facilitate the buffer frame to rise and buffer the hook.

[0010] Preferably, the linkage conductor is connected to the controller of the electric hoist body through a wire, and the inner wall of the protective shell is provided with a heat insulating material such as glass fiber, asbestos, rock wool, etc.

[0011] By adopting the above technical solution, the connecting contacts are driven to contact the linkage conductor through the support column, so that the linkage conductor transmits the signal to the controller of the electric hoist body through the wire, and the impact of high temperature is reduced by the protective shell.

[0012] Preferably, two first tooth plates are fixed on the upper surface of the support column, the inner wall of the protective shell cavity is rotatably connected to two transmission gears, the inner wall of the protective shell cavity is slidably connected to two second tooth plates, a linkage piston column is fixed on the lower surface of the second tooth plate, and a deceleration piston column is slidably connected to the inside of the protective shell.

[0013] By adopting the above technical solution, the sliding of the first tooth plate drives the transmission gear to rotate, and the transmission gear drives the second tooth plate to slide.

[0014] Preferably, a tooth block is provided on the side surface of the first tooth plate, and the first tooth plate is meshed with the transmission gear through the tooth block; a tooth block is provided on the side surface of the second tooth plate, and the second tooth plate is meshed with the transmission gear through the tooth block; a spring is connected between the second tooth plate and the protective shell.

[0015] By adopting the above technical solution, the first tooth plate is driven to slide upward by the rising of the support column, so that the first tooth plate drives the second tooth plate to slide downward through the transmission gear.

[0016] Preferably, the lower end of the linkage piston column passes through the inner surface of the protective shell, the linkage piston column is connected to the deceleration piston column, one end of the deceleration piston column passes through the inner wall of the opening of the protective shell, a spring is connected between the deceleration piston column and the protective shell, and a wear-resistant rubber block is arranged at one end of the deceleration piston column.

[0017] By adopting the above technical solution, the second tooth plate drives the linkage piston column to move, so that the linkage piston column pushes the wear-resistant rubber block deceleration support column at one end of the deceleration piston column.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the electric hoist height limiter:

[0019] 1. A protective shell and a support column are provided, so that when the device is working, the support column and the buffer frame are used to contact and buffer the rising hook, and the impact force is reduced by the spring above the buffer frame. At the same time, the buffer frame contacts the hook through the anti-slip rubber wheel to prevent it from deflecting, thereby improving the stability of the hook movement. Then, the support column drives the connection point to contact the linkage conductor, so that the linkage conductor transmits the signal to the controller of the electric hoist body through the wire for adjustment, and the heat insulation material of the protective shell is used to reduce the influence of high temperature on the device;

[0020] 2. A guide rope ring and a buffer roller are provided, so that when the device is working, the guide rope ring is driven to move by the lifting rope of the electric hoist body, so that the buffer roller on the inner wall of the guide rope ring reduces friction, and at the same time, the guide rope ring drives the connecting frame to slide horizontally, so as to facilitate the position limiting of the lifting rope of the electric hoist body and prevent the lifting rope of the electric hoist body from deflecting;

[0021] 3. A linkage piston column and a deceleration piston column are provided, so that when the device is working, the support column rises to drive the first tooth plate to slide, so that the first tooth plate drives the second tooth plate to descend through the transmission gear, and the second tooth plate drives the linkage piston column to push the air toward the deceleration piston column, so that the deceleration piston column slides and rubs the deceleration support column through the rubber block at one end thereof, thereby reducing the damage caused by impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the connection between the electric hoist body and the hook of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection between the electric hoist body and the protective shell of the utility model;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the electric hoist body and the linkage conductor connection of the utility model;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the protective housing and the buffer frame connected to the utility model;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the connection between the guide rope ring and the buffer roller of the utility model;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the connection between the first tooth plate and the transmission gear of the utility model.

[0028] In the figure: 1. Electric hoist body; 2. Hook; 3. Connecting frame; 4. Rope guide ring; 5. Buffer roller; 6. Protective shell; 7. Support column; 8. Buffer frame; 9. Anti-slip rubber wheel; 10. Connecting contact; 11. Linkage conductor; 12. First tooth plate; 13. Transmission gear; 14. Second tooth plate; 15. Linkage piston column; 16. Deceleration piston column. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-6 The utility model provides a technical solution: an electric hoist height limiter, including an electric hoist body 1, a hook 2, a connecting frame 3, a guide rope ring 4, a buffer roller 5, a protective shell 6, a support column 7, a buffer frame 8, an anti-skid rubber wheel 9, a connecting contact 10, a linkage conductor 11, a first tooth plate 12, a transmission gear 13, a second tooth plate 14, a linkage piston column 15 and a deceleration piston column 16, the electric hoist body 1, which is connected to the hook 2 through a lifting rope, a spring is connected between the connecting frame 3 and the electric hoist body 1, and the opening of the guide rope ring 4 is connected by the lifting of the electric hoist body 1. The rope passes through, and the buffer roller 5 is symmetrically arranged about the center of the guide rope ring 4. When using the device, first, the hook 2 is driven to move up and down through the lifting rope of the electric hoist body 1, and the lifting rope of the electric hoist body 1 is passed through the opening of the guide rope ring 4, so that the lifting rope of the electric hoist body 1 drives the guide rope ring 4 to move, and the buffer roller 5 on the inner wall of the guide rope ring 4 reduces the friction of the lifting rope of the electric hoist body 1 by rotating, and the lifting rope of the electric hoist body 1 drives the guide rope ring 4 and the connecting frame 3 to slide, thereby preventing the lifting rope of the electric hoist body 1 from having a large deviation, thereby improving the working stability.

[0031] The lower surface of one end of the electric hoist body 1 is slidably connected with a connecting frame 3, and one end of the connecting frame 3 is fixedly connected with a guide rope ring 4, the surface of the guide rope ring 4 is provided with an opening, and the inner wall of the opening of the guide rope ring 4 is rotatably connected with two buffer rollers 5, a spring is connected between the protective shell 6 and the buffer frame 8, the lower surface of the buffer frame 8 is arc-shaped, and the linkage conductor 11 is connected to the controller of the electric hoist body 1 through a wire, and the inner wall of the protective shell 6 is provided with heat-insulating materials such as glass fiber, asbestos, rock wool, etc., and the anti-slip rubber wheel 9 on the lower surface of the buffer frame 8 contacts the hook 2, so that The anti-skid rubber wheel 9 increases the friction to prevent skidding, and then the hook 2 drives the support column 7 to slide up through the buffer frame 8. The impact force is buffered by the spring of the buffer frame 8 to reduce damage. At the same time, the connecting contact 10 on the upper surface of the support column 7 contacts the linkage conductor 11, so that the linkage conductor 11 transmits the signal to the controller of the electric hoist body 1 through the wire, so that the electric hoist body 1 adjusts the movement of the hook 2. When working, the protective shell 6 with heat insulation material is used to protect the connecting contact 10 and the linkage conductor 11 to reduce the influence of high temperature on the device.

[0032] A protective shell 6 is fixedly connected to the lower surface of the electric hoist body 1, and an opening is provided on the lower surface of the protective shell 6, and a support column 7 is slidably connected to the inner wall of the opening of the protective shell 6, and two first tooth plates 12 are fixed to the upper surface of the support column 7, and two transmission gears 13 are rotatably connected to the inner wall of the cavity of the protective shell 6, and two second tooth plates 14 are slidably connected to the inner wall of the cavity of the protective shell 6, and a linkage piston column 15 is fixed to the lower surface of the second tooth plate 14, and a deceleration piston column 16 is slidably connected to the inside of the protective shell 6. When the hook 2 pushes the support column 7 and the buffer frame 8 to rise, the support column 7 drives the first tooth plate 12 to move, and the first tooth plate 12 drives the transmission gear 13 to rotate through the tooth block.

[0033] A buffer frame 8 is installed on the lower surface of the support column 7, and an anti-skid rubber wheel 9 is rotatably connected to the lower surface of the buffer frame 8. A connecting contact 10 is fixed to the upper surface of the support column 7. A linkage conductor 11 is arranged on the lower surface of the electric hoist body 1. A tooth block is arranged on the side surface of the first tooth plate 12, and the first tooth plate 12 is meshed with the transmission gear 13 through the tooth block. A tooth block is arranged on the side surface of the second tooth plate 14, and the second tooth plate 14 is meshed with the transmission gear 13 through the tooth block. A spring is connected between the second tooth plate 14 and the protective shell 6. The lower end of the linkage piston column 15 penetrates the inner surface of the protective shell 6, and the linkage The piston column 15 is connected with the deceleration piston column 16, one end of the deceleration piston column 16 passes through the inner wall of the opening of the protective shell 6, a spring is connected between the deceleration piston column 16 and the protective shell 6, and a wear-resistant rubber block is arranged at one end of the deceleration piston column 16. After the transmission gear 13 rotates, it drives the second gear plate 14 and the linkage piston column 15 to descend, and pushes the air toward the deceleration piston column 16 through the linkage piston column 15, so that after the deceleration piston column 16 slides, the rubber block at one end thereof rubs against the outer surface of the support column 7, thereby performing damping braking on the support column 7, further improving the protection of the device against the impact force of the hook 2.

[0034] Working principle: When using the electric hoist height limiter, first control the movement of the hook 2 through the electric hoist body 1, limit the lifting rope of the electric hoist body 1 through the connecting frame 3 and the guide rope ring 4, and reduce friction through the rotation of the buffer roller 5. The buffer frame 8 and the anti-slip rubber wheel 9 contact and buffer the hook 2, so that the buffer frame 8 drives the connecting contact 10 to contact the linkage conductor 11 through the support column 7, thereby controlling the operation of the electric hoist body 1, and drives the first tooth plate 12 to slide through the support column 7, so that the first tooth plate 12 drives the second tooth plate 14 and the linkage piston column 15 to move through the transmission gear 13, so that the linkage piston column 15 pushes the air to the deceleration piston column 16 to make it slide and damp the support column 7, thereby increasing the overall practicality.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric hoist height limiter, comprising an electric hoist body (1), which is connected to a hook (2) via a lifting rope, characterized in that: The lower surface of one end of the electric hoist body (1) is slidably connected to a connecting frame (3), and one end of the connecting frame (3) is fixedly connected to a guide rope ring (4), the surface of the guide rope ring (4) is provided with an opening, and the inner wall of the opening of the guide rope ring (4) is rotatably connected to two buffer rollers (5), the lower surface of the electric hoist body (1) is fixedly connected to a protective shell (6), the lower surface of the protective shell (6) is provided with an opening, and the inner wall of the opening of the protective shell (6) is slidably connected to a support column (7), the lower surface of the support column (7) is installed with a buffer frame (8), the lower surface of the buffer frame (8) is rotatably connected to an anti-slip rubber wheel (9), the upper surface of the support column (7) is fixedly provided with a connecting contact (10), and the lower surface of the electric hoist body (1) is provided with a linkage conductor (11).

2. The electric hoist height limiter according to claim 1, characterized in that: A spring is connected between the connecting frame (3) and the electric hoist body (1); the opening of the guide rope ring (4) is penetrated by the suspension rope of the electric hoist body (1); and the buffer roller (5) is symmetrically arranged about the center of the guide rope ring (4).

3. The electric hoist height limiter according to claim 1, characterized in that: A spring is connected between the protective shell (6) and the buffer frame (8), and the lower surface of the buffer frame (8) is designed to be arc-shaped.

4. The electric hoist height limiter according to claim 1, characterized in that: The linkage conductor (11) is connected to the controller of the electric hoist body (1) via a wire, and the inner wall of the protective shell (6) is provided with a heat insulating material.

5. The electric hoist height limiter according to claim 1, characterized in that: Two first tooth plates (12) are fixed on the upper surface of the support column (7), two transmission gears (13) are rotatably connected to the inner wall of the cavity of the protective shell (6), two second tooth plates (14) are slidably connected to the inner wall of the cavity of the protective shell (6), a linkage piston column (15) is fixed on the lower surface of the second tooth plate (14), and a deceleration piston column (16) is slidably connected to the interior of the protective shell (6).

6. The electric hoist height limiter according to claim 5, characterized in that: The side surface of the first tooth plate (12) is provided with a tooth block, and the first tooth plate (12) is meshed with the transmission gear (13) through the tooth block; the side surface of the second tooth plate (14) is provided with a tooth block, and the second tooth plate (14) is meshed with the transmission gear (13) through the tooth block; a spring is connected between the second tooth plate (14) and the protective shell (6).

7. The electric hoist height limiter according to claim 5, characterized in that: The lower end of the linkage piston column (15) penetrates the inner surface of the protective shell (6), the linkage piston column (15) is connected to the deceleration piston column (16), one end of the deceleration piston column (16) penetrates the inner wall of the opening of the protective shell (6), a spring is connected between the deceleration piston column (16) and the protective shell (6), and a wear-resistant rubber block is arranged at one end of the deceleration piston column (16).