Electric hoist with automatic heat dissipation and anti-falling functions
By setting up inner and outer oil tanks and oil pipes inside the electric hoist drum, automatic heat dissipation is achieved by circulating heat-conducting oil, which solves the problem of poor heat dissipation of the drum, improves the heat dissipation efficiency and equipment safety, and provides anti-fall protection.
Patent Information
- Application Number
- CN202511065188.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2025-10-17
AI Technical Summary
The existing electric hoist drum has poor heat dissipation effect, which leads to heat accumulation and poses a safety hazard, especially affecting the reliability of ropes, bearings and motors during long-term operation.
The hollow reel is equipped with inner and outer oil tanks and oil pipes. Heat-conducting oil circulates between the oil tanks and the oil pipes to achieve automatic heat dissipation, and provides anti-fall protection through the relative position change of the brake disc and friction disc.
It achieves efficient power-free heat dissipation, increases the heat dissipation area and timing, and provides reliable anti-fall insurance, improving the safety and reliability of the equipment.
Smart Images
Figure CN120793772A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electromechanical technology, and in particular to an electric hoist with automatic heat dissipation and anti-falling functions. BACKGROUND
[0002] As a kind of hoisting equipment, electric hoist is usually installed on crown block or gantry crane, and is generally composed of motor, speed reduction mechanism and winding mechanism, so that compactness and heat dissipation are difficult to be considered simultaneously, and in order to improve heat dissipation performance, the existing electric hoist has the following modes: motor and winding drum are separated, high-speed fan is used for active heat dissipation, low-resistance conductive assembly is used to reduce heat generation, and multi-layer winding zigzag rope groove winding drum is used.
[0003] At present, there is no direct and effective heat dissipation mode for the winding drum of electric hoist, and the heat generation of the winding drum mainly comes from the friction between bearing and winding drum, the friction between rope and winding drum sidewall and the mutual friction in the process of rope stress, and the heat accumulation in the closed winding drum can easily cause safety hazards, especially in the case of long running time, which has reliability hazards to rope, bearing and motor. SUMMARY
[0004] The present application is proposed to solve the problems in the prior art, and provides an electric hoist capable of automatic heat dissipation during operation.
[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: an electric hoist with automatic heat dissipation and anti-falling functions, characterized in that it comprises a motor, a speed reduction gear set and a winding drum, the output shaft of the motor is connected with the input end of the speed reduction gear set, the output end of the speed reduction gear set is connected with the winding drum, the winding drum comprises an outer oil tank, an inner oil tank and a body rotatingly connected between the inner oil tank and the outer oil tank, the body is a hollow structure, the two ends of the body are respectively communicated with the inner oil tank and the outer oil tank, the inner wall of the body has spiral oil guide ribs, a plurality of oil pipes distributed outside the body are connected between the inner oil tank and the outer oil tank, and the oil pipes are communicated with the inner oil tank and the outer oil tank.
[0006] Further, the speed reduction gear set is located in the inner oil tank.
[0007] Further, the body is internally provided with a mandrel fixed on the shell of the outer oil tank, the mandrel is slidably connected with a brake disc through a spline, the body is fixedly provided with a friction disc adapted to the brake disc at one end close to the outer oil tank, a return spring is connected between the brake disc and the shell of the outer oil tank, and the brake disc, the friction disc and the return spring are located in the outer oil tank.
[0008] Further, the inner oil tank, the outer oil tank, the oil pipes and the inner cavity of the body are filled with heat conducting oil.
[0009] Further, the electric hoist drives the heat conducting oil to circulate from the inner oil tank to the outer oil tank in the body when winding, and drives the heat conducting oil to circulate from the outer oil tank to the inner oil tank in the body when unwinding.
[0010] Further, each oil pipe is arranged in a poor arc above the body.
[0011] In the scheme, the electric hoist starts the circulating mode of the heat conducting oil when running, and the heat conducting oil circulates between the inner oil tank, the outer oil tank, the oil pipes and the inner cavity of the body. Specifically, when winding, the circulating path of the heat conducting oil is: the outer oil tank, the oil pipe, the inner oil tank, the inner cavity of the body, and the inner cavity of the body flows from the inner side to the outer side and then flows back to the outer oil tank, and so on. The heat conducting oil pushes the brake disc to open the brake disc and the friction disc, at this time, the oil path is smooth and the resistance is small; when unwinding, the circulating path of the heat conducting oil is: the outer oil tank, the inner cavity of the body, the inner oil tank, the oil pipe, and the inner cavity of the body flows from the outer side to the inner side and then flows back to the inner oil tank, and so on. The heat conducting oil is driven by the negative pressure of the inner cavity of the body to make the brake disc close to the friction disc, so that the distance between the brake disc and the friction disc is reduced. At this time, if the body speed is low, the oil path is smooth, but there is a certain damping force, if the body speed is fast, the brake disc is closer to the friction disc, and the damping force is larger. If the body suddenly unwinds quickly or the body speed is too fast, the negative pressure in the inner cavity of the body will suddenly increase, causing the brake disc to stick to the friction disc, and then forming a rigid brake on the rotation of the body. At this time, it can assist other brake protection of the electric hoist, increase the braking force, or it is a more reliable anti-falling insurance.
[0012] As the heat dissipation function of the scheme, the heat conducting oil is quickly circulated, compared with the prior art, the heat dissipation occurs during the operation of the electric hoist, belongs to the forced heat dissipation without power, has high heat dissipation efficiency, large heat dissipation area and timely heat dissipation opportunity. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the electric hoist;
[0014] Figure 2 It is a sectional view of the winding drum part of the electric hoist;
[0015] Figure 3 It is a cross-sectional view of the body.
[0016] Legend: 1. Motor; 2. Reduction gear set; 3. Outer oil tank; 4. Inner oil tank; 5. Main body; 6. Oil guide rib; 7. Oil pipe; 8. Core shaft; 9. Brake disc; 10. Friction disc; 11. Return spring. DETAILED DESCRIPTION
[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.
[0018] like Figure 1 、 Figure 2 and Figure 3 As shown, the spool comprises a motor 1, a reduction gear set 2, and a drum. The output shaft of the motor 1 is connected to the input end of the reduction gear set 2, which in turn is connected to the drum. The drum comprises an outer oil tank 3, an inner oil tank 4, and a body 5 rotatably connected between the inner and outer oil tanks 4 and 3. The body 5 is hollow, with its ends connecting the inner and outer oil tanks 4 and 3, respectively. The inner wall of the body 5 has spiral oil-guiding ribs 6. Several oil pipes 7, distributed on the outer side of the body 5, connect the inner and outer oil tanks 4 and 3. The oil pipes 7 connect the inner and outer oil tanks 4 and 3. The reduction gear set 2 comprises an output gear fixed to the inner end of the body 5, a small-diameter intermediate gear meshing with the output gear, a large-diameter intermediate gear coaxial with the small-diameter intermediate gear, and a small-diameter input gear meshing with the large-diameter intermediate gear. The small-diameter input gear is connected to the output shaft of the motor 1. The output gear, small-diameter intermediate gear, large-diameter intermediate gear, and small-diameter input gear are all located within the inner oil tank 4.
[0019] A core shaft 8 fixed on the shell of the outer oil tank 3 is inserted into the main body 5, and the inner end of the core shaft 8 is fixedly connected to the shell of the inner oil tank 4. The core shaft 8 can enhance the strength and coaxiality of the main body 5. A brake disc 9 is slidably connected to the core shaft 8 through a spline. A friction disc 10 adapted to the brake disc 9 is fixedly provided at one end of the main body 5 close to the outer oil tank 3. A return spring 11 is connected between the brake disc 9 and the shell of the outer oil tank 3. The brake disc 9, friction disc 10 and return spring 11 are all located in the outer oil tank 3. The inner cavity of the inner oil tank 4, the outer oil tank 3, the oil pipe 7 and the main body 5 are filled with heat transfer oil. Under normal conditions, there is a distance between the friction disc 10 and the brake disc 9 when the return spring 11 is in operation, allowing the heat transfer oil to circulate.
[0020] Each oil pipe 7 is distributed in a bad arc just above the main body 5 to make room for the rope to escape. In addition, in order to increase the heat dissipation area, fins can also be provided in the area outside the inner side of the outer oil tank 3.
[0021] When the electric hoist is winding, the heat conducting oil is driven to flow from the inner tank 4 to the outer tank 3 in the body 5; when the electric hoist is unwinding, the heat conducting oil is driven to flow from the outer tank 3 to the inner tank 4 in the body 5, and the electric hoist is running, that is, the circulation mode of the heat conducting oil is opened, and the heat conducting oil flows among the inner tank 4, the outer tank 3, the oil pipe 7 and the inner cavity of the body 5, specifically, the flow path of the heat conducting oil when winding is: the outer tank 3, the oil pipe 7, the inner tank 4, the inner cavity of the body 5, and the inner cavity of the body 5 flows from the inner side to the outer side and then flows back to the outer tank 3 again, and so on, the heat conducting oil pushes the brake disc 9, so that the brake disc 9 and the friction disc 10 are opened, at this time, the oil way is smooth, and the resistance is small; the flow path of the heat conducting oil when unwinding is: the outer tank 3, the inner cavity of the body 5, the inner tank 4, the oil pipe 7, and the inner cavity of the body 5 flows from the outer side to the inner side and then flows back to the inner tank 4 again, and so on, the heat conducting oil is driven to make the brake disc 9 close to the friction disc 10 under the action of the negative pressure of the inner cavity of the body 5, so that the distance between the brake disc 9 and the friction disc 10 is reduced, at this time, if the speed of the body 5 is low, the oil way is smooth, but there is a certain damping force, if the speed of the body 5 is fast, the brake disc 9 is closer to the friction disc 10, and the damping force is larger, if the body 5 suddenly unwinds fast or the speed of the body 5 is too fast, the negative pressure of the inner cavity of the body 5 will increase suddenly, and the brake disc 9 will be close to the friction disc 10, and then the rotation of the body 5 will be rigidly braked, at this time, the other brake protection of the electric hoist can be assisted, the braking force is increased, or it is a more reliable anti-falling insurance.
[0022] As the heat dissipation function of the present scheme, the rapid flow of the heat conducting oil is utilized, compared with the prior art, the heat dissipation occurs during the operation of the electric hoist, belongs to the forced heat dissipation without power, has high heat dissipation efficiency, large heat dissipation area and timely heat dissipation opportunity.
[0023] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.
Claims
1. An electric hoist with automatic heat dissipation and anti-falling function, characterized in that: The invention comprises a motor (1), a reduction gear set (2) and a reel, wherein the output shaft of the motor (1) is connected to the input end of the reduction gear set (2), and the output end of the reduction gear set (2) is connected to the reel, and the reel comprises an outer oil tank (3), an inner oil tank (4) and a body (5) rotatably connected between the inner oil tank (4) and the outer oil tank (3), wherein the body (5) is a hollow structure, and the two ends of the body (5) are respectively connected to the inner oil tank (4) and the outer oil tank (3), and the inner wall of the body (5) has a spiral oil guide rib (6), and a plurality of oil pipes (7) distributed on the outer side of the body (5) are connected between the inner oil tank (4) and the outer oil tank (3), and the oil pipes (7) are connected to the inner oil tank (4) and the outer oil tank (3).
2. The electric hoist with automatic heat dissipation and anti-falling function according to claim 1 is characterized in that The reduction gear set (2) is located in the inner oil tank (4).
3. An electric hoist with automatic heat dissipation and anti-falling function according to claim 1 or 2, characterized in that A core shaft (8) fixed to the shell of the outer oil tank (3) is inserted into the body (5); a brake disc (9) is slidably connected to the core shaft (8) via a spline; a friction disc (10) adapted to the brake disc (9) is fixedly provided at one end of the body (5) close to the outer oil tank (3); a return spring (11) is connected between the brake disc (9) and the shell of the outer oil tank (3); and the brake disc (9), friction disc (10) and return spring (11) are all located in the outer oil tank (3).
4. The electric hoist with automatic heat dissipation and anti-falling function according to claim 3 is characterized in that The inner oil tank (4), the outer oil tank (3), the oil pipe (7) and the inner cavity of the body (5) are filled with heat-conducting oil.
5. The electric hoist with automatic heat dissipation and anti-falling function according to claim 4 is characterized in that When the electric hoist is wound up, the heat transfer oil is driven to flow from the inner oil tank (4) to the outer oil tank (3) in the body (5); when the electric hoist is unwound, the heat transfer oil is driven to flow from the outer oil tank (3) to the inner oil tank (4) in the body (5).
6. An electric hoist with automatic heat dissipation and anti-falling function according to claim 1 or 2, characterized in that Each oil pipe (7) is distributed in a bad arc just above the body (5).