Electric hoist with high safety performance
By introducing an electromagnetic induction sensor and an overspeed protection component of a PLC controller into the electric hoist, as well as a buffer plate and anti-fall component for the anti-fall assembly, the problems of overspeed and overload of the electric hoist are solved, and the safety protection of the equipment is achieved.
Patent Information
- Application Number
- CN202520532259.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Existing electric hoists lack overspeed and overload protection devices, which makes the equipment prone to damage or falling when overspeeding or overloaded.
The overspeed protection component uses an electromagnetic induction sensor and a positioning ring to calculate the rotation speed, and combines this with a PLC controller to control the brake for deceleration protection. The anti-fall component uses a buffer plate and anti-fall device to prevent falling.
It effectively prevents electric hoists from overspeeding and overloading, reduces equipment damage, avoids direct falls, and improves safety performance.
Smart Images
Figure CN223866214U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric hoist equipment technology, and in particular to an electric hoist with high safety performance. Background Technology
[0002] In recent years, with the development of infrastructure, lifting equipment has been widely used. Electric hoists are widely used for lifting goods and are an important component of cranes. Common faults of electric hoists mainly include overspeed and overload. Overspeed often occurs during the lifting and unloading of goods, and may cause the electric hoist to stall for some reason, resulting in very serious losses. When the electric hoist is overloaded, it is prone to falling. If there is no protective equipment, the electric hoist can easily fall and be destroyed. Most of the electric hoists on the market are not equipped with protection devices for the above two faults at the same time. Therefore, we propose an electric hoist with high safety performance. Summary of the Invention
[0003] The purpose of this utility model is to provide an electric hoist with high safety performance to solve the problems mentioned in the background art of the lack of overspeed protection and overload protection.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-safety electric hoist, comprising an electric hoist body installed on a track, an anti-fall component and an overspeed protection component connected to the electric hoist body, and a PLC controller. The electric hoist body includes a shell, a conical rotor brake motor and a gearbox disposed on both sides of the shell, the output end of the conical rotor brake motor passing through the shell and connected to one end of the drum, one end of the gearbox being connected to the other end of the drum, and the other end of the gearbox being connected to a brake. The overspeed protection component includes a positioning ring sleeved on one side of the outer wall of the drum. The shell is provided with a mounting bracket. An electromagnetic induction sensor perpendicular to the surface of the positioning ring is fixed on the top. Multiple metal blocks are circumferentially arranged at equal intervals on the outer wall of the positioning ring. The track includes an upper track and a lower track. The anti-fall component includes support plates set on both sides of the middle of the top of the shell. A first roller that is rolled and connected to the lower track is set on one side of the end of the support plate. A rotating motor for driving the roller to roll is set on the other side of the end of the support plate. Fixed plates are set on both sides of the top of the shell. An anti-fall plate is set on the top of the fixed plate. An anti-fall component is set at the bottom of the anti-fall plate. The conical rotor brake motor, brake, electromagnetic induction sensor, and rotating motor are electrically connected to the PLC controller.
[0005] As a preferred embodiment of the electric hoist with high safety performance described in this utility model, the electromagnetic induction sensor adopts an inductive proximity switch with model number NBN8-18GM50-E0.
[0006] As a preferred embodiment of the electric hoist with high safety performance described in this utility model, the anti-fall component includes a buffer plate between the anti-fall plate and the upper rail, and multiple sets of springs are provided at intervals between the buffer plate and the anti-fall plate.
[0007] As a preferred embodiment of the electric hoist with high safety performance described in this utility model, the top of the buffer plate is provided with multiple limiting rods, and the anti-fall plate has through holes at positions corresponding to the limiting rods, with the top of the limiting rods passing through the through holes.
[0008] As a preferred embodiment of the electric hoist with high safety performance described in this utility model, a second roller is respectively provided at the bottom corner of the buffer plate and at the position corresponding to the upper rail.
[0009] As a preferred embodiment of the electric hoist with high safety performance described in this utility model, a steel wire rope is wound around the outer wall of the drum, and one end of the steel wire rope is connected to the hook.
[0010] In a preferred embodiment of the electric hoist with high safety performance described in this utility model, the PLC controller is disposed on the surface of the outer casing.
[0011] The beneficial effects of this utility model are as follows: This utility model uses the electromagnetic induction sensor in the overspeed protection component and multiple metal blocks on the positioning ring to calculate the speed of the conical rotor brake motor. If the speed exceeds the limit, the PLC controller controls the brake to decelerate the conical rotor brake motor. If the load is too large and causes the entire electric hoist body to fall, the anti-fall plate and anti-fall components in the anti-fall component can buffer and protect the entire electric hoist body and prevent it from falling directly. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0013] Figure 1 This is a structural diagram of a high-safety-performance electric hoist.
[0014] Figure 2 This is a schematic diagram of the structure of the electric hoist body in a high-safety electric hoist.
[0015] Figure 3 This is a schematic diagram of the positioning ring in a high-safety electric hoist.
[0016] Figure 4 This is a schematic diagram of the anti-fall component in a high-safety electric hoist. Detailed Implementation
[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0018] Reference Figures 1-4 This embodiment is a high-safety electric hoist, including an electric hoist body 100 mounted on a rail 200, a fall protection component 300 and an overspeed protection component 400 connected to the electric hoist body 100, and a PLC controller 500. The electric hoist body 100 includes a housing 101, a conical rotor brake motor 102 and a reduction gearbox 103 disposed on both side walls of the housing 101. The output end of the conical rotor brake motor 102 passes through the housing 101 and is connected to one end of the drum 104. One end of the reduction gearbox 103 is connected to the other end of the drum 104, and the other end of the reduction gearbox 103 is connected to a brake 105. The overspeed protection component 400 includes a positioning ring 401 sleeved on one side of the outer wall of the drum 104. The housing 101 is provided with a mounting bracket 402, on which a component perpendicular to the surface of the positioning ring 401 is fixed. The electromagnetic induction sensor 403 is straight. Multiple metal blocks 404 are circumferentially arranged at equal intervals on the outer wall of the positioning ring 401. The track 200 includes an upper track 201 and a lower track 202. The anti-fall component 300 includes support plates 301 arranged on both sides of the middle of the top of the housing 101. A first roller 302 is rolled and connected to the lower track 202 on one side of the end of the support plate 301. A rotating motor 303 for driving the roller 302 to roll is arranged on the other side of the end of the support plate 301. Fixing plates 304 are respectively arranged on both sides of the top of the housing 101. An anti-fall plate 305 is arranged at the top of the fixing plate 304. An anti-fall component 306 is arranged at the bottom of the anti-fall plate 305. The conical rotor brake motor 102, the brake 105, the electromagnetic induction sensor 403, and the rotating motor 303 are electrically connected to the PLC controller 500.
[0019] When the conical rotor brake motor 102 is activated, it drives the drum 104 to rotate. As the drum 104 rotates, it also drives the positioning ring 401 to rotate. Since an electromagnetic induction sensor 403, perpendicular to the surface of the positioning ring 401, is fixed on the mounting bracket 402, when the metal block 404 on the positioning ring 401 rotates to face the electromagnetic induction sensor 403, the electromagnetic induction sensor 403 sends an electrical signal to the PLC controller 500. The number of metal blocks 404 can be set. The PLC controller 500 receives a corresponding number of electrical signals for each rotation of the drum 104. The PLC controller 500 then adjusts the position of the conical rotor brake motor 104 within a unit of time. The rotational speed can be obtained by calculating the number of revolutions of the conical rotor brake motor 102. The calculated rotational speed is compared with the rated speed of the conical rotor brake motor 102. If it exceeds the rated speed by a certain value, it is an overspeed state. The PLC controller 500 controls the brake 105 to brake and prevent overspeed. When the load on the electric hoist body 100 is too large, causing the first roller 302 to fall off or tilt, the electric hoist body 100 will detach from the lower rail 202 and fall. At this time, the anti-fall device 306 first contacts the top of the upper rail 201 to buffer and reduce the impact on the rail 200 when falling. The anti-fall plate 305 can prevent the electric hoist body 100 from falling off the rail 200.
[0020] In this embodiment, the electromagnetic induction sensor 403 is an inductive proximity switch with model number NBN8-18GM50-E0.
[0021] In this embodiment, the fall arrestor 306 includes a buffer plate 306a located between the fall arrestor plate 305 and the upper track 201, and multiple sets of springs 306b are provided at intervals between the buffer plate 306a and the fall arrestor plate 305.
[0022] When the electric hoist body 100 falls, the buffer plate 306a first contacts the upper rail 201. The multiple sets of springs 306b between the buffer plate 306a and the anti-fall plate 305 can buffer the impact force on the upper rail 201.
[0023] In this embodiment, the top of the buffer plate 306a is provided with a plurality of limiting rods 306c, and the anti-fall plate 305 has through holes 306d at positions corresponding to the limiting rods 306c, with the top of the limiting rods 306c passing through the through holes 306d.
[0024] The limiting rod 306c serves to limit the movement and prevent the buffer plate 306a from shifting away from the fall arrestor plate 305.
[0025] In this embodiment, a second roller 306e is provided at the bottom corner of the buffer plate 306a, corresponding to the position of the upper track 201.
[0026] When the fall occurs as the electric hoist body 100 moves along the track 200, the second roller 306e at the bottom of the buffer plate 306a can contact the top of the upper track 201 first when the buffer plate 306a falls, thus avoiding direct friction between the buffer plate 306a and the top of the upper track 201.
[0027] In this embodiment, a steel wire rope 106 is wound around the outer wall of the drum 104, and one end of the steel wire rope 106 is connected to the hook 107.
[0028] The heavy object is lifted by hook 107.
[0029] In this embodiment, the PLC controller 500 is disposed on the surface of the housing 101.
[0030] Working Principle: The hook 107 lifts the load, and the PLC controller 500 starts the rotating motor 303, driving the first roller 302 to roll along the lower track 202. When the conical rotor brake motor 102 is activated, it drives the drum 104 to rotate, winding the wire rope 106. As the drum 104 rotates, it drives the positioning ring 401 to rotate. Since an electromagnetic induction sensor 403, perpendicular to the surface of the positioning ring 401, is fixed on the mounting bracket 402, when the metal block 404 on the positioning ring 401 rotates to face the electromagnetic induction sensor 403, the electromagnetic induction sensor 403 sends an electrical signal to the PLC controller 500. The number of metal blocks 404 can be set. The PLC controller 500 receives a corresponding number of electrical signals for each rotation of the drum 104. By calculating the number of rotations of the conical rotor brake motor 102 per unit time, the PLC controller 500 can obtain the working principle. The calculated rotational speed is compared with the rated speed of the conical rotor brake motor 102. If the speed exceeds the rated speed by a certain value, it is considered an overspeed condition. The PLC controller 500 controls the brake 105 to brake and prevent overspeed. When the load on the electric hoist body 100 is too large, causing the first roller 302 to fall off or tilt, the electric hoist body 100 will detach from the lower rail 202 and fall. When the electric hoist body 100 falls, the second roller 306e at the bottom of the buffer plate 306a can first contact the top of the upper rail 201 when the buffer plate 306a falls, avoiding direct sliding friction between the buffer plate 306a and the top of the upper rail 201. Then, the multiple sets of springs 306b between the buffer plate 306a and the anti-fall plate 305 can buffer the impact force on the upper rail 201 and reduce the impact on the rail 200 when falling. The anti-fall plate 305 can prevent the electric hoist body 100 from completely detaching from the rail 200 and prevent the electric hoist body 100 from falling directly.
[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A high-safety-performance electric hoist, characterized in that: The system includes an electric hoist body (100) mounted on a track (200), a fall arrestor (300) and an overspeed protection component (400) connected to the electric hoist body (100), and a PLC controller (500). The electric hoist body (100) includes a housing (101), a conical rotor brake motor (102) and a gearbox (103) disposed on both sides of the housing (101). The output end of the conical rotor brake motor (102) passes through the housing (101) and is connected to one end of the drum (104). One end of the gearbox (103) is connected to the other end of the drum (104), and the other end of the gearbox (103) is connected to the brake (105). The overspeed protection component (400) includes a positioning ring (401) sleeved on one side of the outer wall of the drum (104). The housing (101) is provided with a mounting bracket (402), and an electromagnetic induction sensor (400) perpendicular to the surface of the positioning ring (401) is fixed on the mounting bracket (402). 03), the outer wall of the positioning ring (401) is provided with multiple metal blocks (404) at equal intervals in the circumferential direction. The track (200) includes an upper track (201) and a lower track (202). The anti-fall component (300) includes a support plate (301) provided on both sides of the middle of the top of the shell (101). A first roller (302) is provided on one side of the end of the support plate (301) and is connected to the lower track (202). A rotating motor (303) for driving the first roller (302) to roll is provided on the other side of the end of the support plate (301). A fixing plate (304) is provided on both sides of the top of the shell (101). An anti-fall plate (305) is provided on the top of the fixing plate (304). An anti-fall component (306) is provided at the bottom of the anti-fall plate (305). The conical rotor brake motor (102), the brake (105), the electromagnetic induction sensor (403), and the rotating motor (303) are electrically connected to the PLC controller (500).
2. The electric hoist with high safety performance as described in claim 1, characterized in that: The electromagnetic induction sensor (403) uses an inductive proximity switch with model number NBN8-18GM50-E0.
3. The electric hoist with high safety performance as described in claim 1, characterized in that: The fall arrestor (306) includes a buffer plate (306a) between the fall arrestor plate (305) and the upper track (201), and multiple sets of springs (306b) are spaced apart between the buffer plate (306a) and the fall arrestor plate (305).
4. The electric hoist with high safety performance as described in claim 3, characterized in that: The top of the buffer plate (306a) is provided with multiple limiting rods (306c). The anti-fall plate (305) has through holes (306d) at the corresponding positions of the limiting rods (306c). The top of the limiting rods (306c) passes through the through holes (306d).
5. The electric hoist with high safety performance as described in claim 4, characterized in that: A second roller (306e) is provided at the bottom corner of the buffer plate (306a) at a position corresponding to the upper rail (201).
6. The electric hoist with high safety performance as described in claim 1, characterized in that: A steel wire rope (106) is wound around the outer wall of the drum (104), and one end of the steel wire rope (106) is connected to the hook (107).
7. The electric hoist with high safety performance as described in claim 1, characterized in that: The PLC controller (500) is mounted on the surface of the housing (101).