A chain electric hoist

Abstract

The present invention discloses a chain electric hoist, which relates to the technical field of lifting devices, including a hook frame, a chain, a swing mechanism and a wall panel, wherein the swing mechanism includes a guide wheel frame and a guide wheel, wherein the guide wheel frame is a symmetrical structure, a rotating connection structure is provided between the guide wheel frame and the hook frame, the connection point of the rotating connection structure is located on the symmetric axis of the guide wheel frame, and the guide wheel is rotatably connected to the symmetrical two ends of the guide wheel frame; the wall panel is provided with a guide groove, and the guide groove cooperates with the shaft of the guide wheel to form a limiting structure, and the shaft of the guide wheel is slidably connected to the wall panel. The invention has the following beneficial effects: (1) the interference between the load-side guide wheel and the lifting chain is avoided, and abnormal wear of the chain and damage to the guide wheel are prevented; (2) the non-load-side guide wheel can be closer to the lifting chain, so that the chain and the sprocket mesh better and chain climbing is prevented; (3) the chains on both sides of the electric hoist can be used for lifting, thereby improving work efficiency and reducing energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of lifting devices, and in particular to an electric chain hoist. Background Art

[0002] Electric hoist is a kind of lifting equipment, installed on the overhead crane and gantry crane. Electric hoist has the characteristics of small size, light weight, simple operation and convenient use. It is used in industrial and mining enterprises, warehouses, docks and other places.

[0003] Electric hoists are compact in structure, usually designed with one side of the chain for lifting, and the other side hanging naturally or placed in a chain bag. When in use, the motor drives the hook up and down to lift and lower the weight. The chain on the other side cannot be used for lifting. When used in a cycle, the hook needs to be lowered to lift the weight again. The efficiency is low, especially the large-sized electric hoists have slow operation speeds and the hook takes a long time to lower, which seriously affects the work efficiency. The chain and chain guide device of the chain hoist that can be used on both sides are easy to interfere and get stuck when the swing amplitude at both ends is large. The chain sometimes even flies out. The chain will also exert a large force on the other parts of the hoist, increasing the probability of damage to the chain hoist. Summary of the invention

[0004] 1. Technical problem to be solved by the invention

[0005] In view of the technical problems that the above conventional chain hoists usually lift on one side, and the chain hoists lifting on both sides are prone to interference and generate a lot of stress, which is easy to cause damage to the device, the present invention provides a chain electric hoist, which adopts a mode that can work on both sides, adds a swing mechanism and designs a movable guide wheel, avoids interference between the chain and the guide wheel, optimizes the force structure, and reduces the probability of damage to the chain hoist.

[0006] 2. Technical solution

[0007] To solve the above problems, the technical solution provided by the present invention is:

[0008] A chain electric hoist comprises a hook frame, a chain, a swing mechanism and a wall plate.

[0009] A hook frame, the hook frame is rotatably connected to the wall panel, and a section of volume extends from the connection between the hook frame and the wall panel and is rotatably connected to the swing mechanism;

[0010] A chain, wherein the chain is wound around a sprocket;

[0011] The swing mechanism comprises a guide wheel frame and a guide wheel, wherein the guide wheel frame is a symmetrical structure, a rotation connection structure is provided between the guide wheel frame and the hook frame, the connection point of the rotation connection structure is located on the symmetry axis of the guide wheel frame, the guide wheel is rotationally connected to the symmetrical two ends of the guide wheel frame, and the guide wheel is provided with a shaft;

[0012] The wall panel is provided with a guide groove, the guide groove cooperates with the shaft of the guide wheel to form a limiting structure, the shaft of the guide wheel is slidably connected to the wall panel, and the guide groove is an arc structure.

[0013] Optionally, the rotating connection structure includes a shift plate, a support rod and a shift shaft, and both ends of the shift plate are rotationally connected to the hook frame and the guide wheel frame through the shift shaft.

[0014] Optionally, there is a height difference between a connection point of the rotating connection structure and a connection point of the guide wheel, and the connection point of the rotating connection structure is higher than the connection point of the guide wheel.

[0015] Optionally, the wall panel is provided with a limiting column, and the guide wheel frame is provided with a notch, the limiting column and the notch cooperate with each other, the notch is arc-shaped, and the length of the notch is less than or equal to the length of the guide groove.

[0016] Optionally, a support column is provided in the wall panel, and the support column is fixedly connected to the wall panel.

[0017] Optionally, the wall panel is provided with a sprocket, and the chain is wound around the sprocket.

[0018] Optionally, a side of the guide wheel frame close to the sprocket is arc-shaped.

[0019] Optionally, an annular groove is provided in the middle of the guide wheel, and the annular groove is U-shaped.

[0020] Optionally, the wall panel is a double-layer plate structure, and the hook frame, the swing mechanism, the wall panel and the chain are located between the double-layer plate structure.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0023] (1) An electric chain hoist proposed in an embodiment of the present application avoids interference between the load-side guide wheel and the lifting chain, thereby preventing abnormal wear of the chain and damage to the guide wheel.

[0024] (2) The electric chain hoist proposed in the embodiment of the present application enables the non-load side guide wheel to be closer to the lifting chain, so that the chain and the sprocket can mesh better and prevent chain climbing.

[0025] (3) The electric chain hoist proposed in the embodiment of the present application enables the chains on both sides of the electric hoist to be used for lifting, thereby improving work efficiency and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1The present invention is a schematic structural diagram of an electric chain hoist proposed in an embodiment of the present invention.

[0027] Figure 2 A schematic structural diagram of a wall panel of an electric chain hoist proposed in an embodiment of the present invention.

[0028] Figure 3 The present invention is a schematic structural diagram of a shift plate of an electric chain hoist proposed in an embodiment of the present invention.

[0029] Figure 4 The present invention is a schematic structural diagram of a guide wheel frame of an electric chain hoist proposed in an embodiment of the present invention.

[0030] 1. Hook frame; 2. Hook shaft; 3. Hook frame shift shaft; 4. Support rod; 5. Guide wheel frame shift shaft; 6. Shift plate; 7. Guide wheel frame; 8. Guide wheel; 801, ring groove; 9. Wall panel; 901, guide groove; 10. Chain. DETAILED DESCRIPTION

[0031] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0032] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0033] Example

[0034] Combined with Figure 1-4 A chain electric hoist comprises a hook frame 1, a chain 10, a swing mechanism and a wall panel 9. The hook frame 1 is rotatably connected to the wall panel 9. One end of the hook frame 1 is a ring structure, which is used to be connected to an external load-bearing device by an external hook or chain 10. A hook shaft 2 is provided at the connection between the hook frame 1 and the wall panel 9, and the hook shaft 2 passes through the hook frame 1 and the wall panel 9. A section of volume extends from the connection between the hook frame 1 and the wall panel 9 and is rotatably connected to the swing mechanism. The section of volume is used to connect the dial plate 6. The section of volume is provided with a through hole. The hook frame dial shaft 3 is fixed to the dial plate 6 and passes through the through hole.

[0035] The chain 10 is used for load lifting, and the wall panel 9 is provided with a sprocket, and the chain 10 is wound around the sprocket. An annular groove 801 is provided in the middle of the guide wheel 8. The chain 10 cooperates with the annular groove 801 of the guide wheel 8, and the annular groove 801 is U-shaped, which is conducive to the sliding of the chain 10, and the annular groove 801 itself can limit the chain 10.

[0036] The swing mechanism includes a guide wheel frame 7 and a guide wheel 8. The swing mechanism is used to control the positional relationship between the guide wheel 8 and the chain 10 and the positional relationship between the hook frame 1 and the chain 10 working under load. The guide wheel frame 7 is a symmetrical structure. A rotation connection structure is provided between the guide wheel frame 7 and the hook frame 1. The connection of the rotation connection structure is located on the symmetry axis of the guide wheel frame 7, which is conducive to keeping the hoist itself in a left-right balanced state when not under load. The guide wheel 8 is rotationally connected to the symmetrical ends of the guide wheel frame 7. The rotation connection structure includes a shifting plate 6, a support rod 4 and a shifting shaft. The two ends of the shifting plate 6 are rotationally connected to the hook frame 1 and the guide wheel frame 7 through the shifting shaft. On the shifting plate 6, the one close to the hook frame 1 is the hook frame shifting shaft 3, and the one close to the guide wheel frame 7 is the guide wheel frame shifting shaft 5. The hook frame shifting shaft 3 and the guide wheel frame shifting shaft 5 are both used for rotational connection.

[0037] The said shift plate 6 is a two-piece structure, which is positioned by a shift shaft and can rotate around the support rod 4. There is a height difference between the connection of the rotating connection structure and the connection of the guide wheel 8, and the connection of the rotating connection structure is higher than the connection of the guide wheel 8. The shape of the guide wheel frame 7 in this embodiment is arc-shaped, and the connection of the rotating connection structure and the connection of the guide wheel 8 form an isosceles triangle structure. When the chain 10 on one side is loaded, the hoist as a whole will rotate with the hook shaft 2 as the center to achieve force balance. After the connection of the rotating connection structure and the connection of the guide wheel 8 have a height difference, the overall rotation angle of the hoist will be reduced to avoid the chain 10 being lost or even falling off the sprocket due to excessive rotation of the hoist. The function of the shift plate 6 is to compensate for the distance between the center line of the hook frame 1 and the plumb line of the loaded chain 10: after the chain 10 on one side is loaded, one end of the hook frame 1 of the shift plate 6 remains stationary, and the other end is subjected to the pulling force on the non-stressed side. The shift plate 6 rotates a certain angle, and the shift plate 6 itself has a certain length. After the rotation, the position of the guide wheel frame 7 is offset to the non-stressed side, compensating for the moving length of the chain 10 on the stressed side, making the center line of the hook frame 1 and the plumb line of the loaded chain 10 closer, optimizing the stress structure, and extending the service life of the device.

[0038] The guide wheel 8 is provided with a shaft, which is longer than the width of the guide wheel 8 and extends into the guide groove 901 of the wall panel 9. The guide groove 901 cooperates with the shaft of the guide wheel 8 to form a limiting structure. The shaft of the guide wheel 8 is slidably connected to the wall panel 9, and the guide groove 901 is an arc-shaped structure. Under the pulling force of the paddle 6, the shaft of the guide wheel 8 has a tendency to rotate in the opposite direction to the overall rotation of the hoist, thereby pulling the guide wheel 8 to slide in the guide groove 901. After sliding, the actual rotation angle of the guide wheel 8 is smaller than the rotation angle of the hoist, forming a compensation for the rotation angle. The above-mentioned rotation angle is the overall rotation of the two guide wheels 8 rather than the self-rotation of a single guide wheel 8. After the compensation for the rotation angle is formed, the position of the guide wheel 8 at one end of the chain 10 working under load is farther away from the chain 10 than when the compensation for the rotation angle is not formed, thereby avoiding interference with the chain 10. The guide wheel 8 at one end of the chain 10 working without load is closer to the chain 10 than when no rotation angle compensation is formed, thereby strengthening the position limitation of the chain 10 at this end and preventing the chain 10 from losing position or even falling off.

[0039] The arc structure of the guide groove 901 takes the center of the sprocket around which the chain 10 is wound as the center of the circle. The shape of the guide groove 901 determines the movement trajectory of the guide wheel 8. The arc structure ensures that after the hoist rotates, the guide wheel 8 can correctly approach or move away from the chain 10 as in the above case, so as to achieve the purpose of the respective end guide wheels 8. The connecting line of the guide groove 901 intersects with the axis of the sprocket. Since the guide wheel 8 on the non-stress side needs to make the chain 10 close to the sprocket to prevent the chain 10 from being dislocated or falling off, the intersection of the connecting line of the guide groove 901 with the axis of the sprocket means that the horizontal line passing through the axis in the balanced state passes through the guide groove 901, that is, when the guide wheel 8 on the non-stress side moves to the lower end of the guide groove 901, the chain 10 will be limited to be close to the sprocket to prevent the chain 10 from falling off.

[0040] The wall panel 9 is provided with a limit column, and the guide wheel frame 7 is provided with a notch, and the notch is used for avoiding position. The limit column cooperates with the notch, and the notch is arc-shaped, and the length of the notch is less than or equal to the length of the guide groove 901. The structure of the limit column and the notch is to protect the guide groove 901 and the guide wheel 8 structure when the load force is too large, thereby improving safety.

[0041] The wall panel 9 is provided with a support column, and the support column is fixed to the wall panel 9. The support column is conducive to improving the structural strength of the wall panel 9. The wall panel 9 is a double-layer plate structure, and the hook frame 1, the swing mechanism, the wall panel 9 and the chain 10 are located between the double-layer plate structure. The wall panel 9 is connected to the outside with a low-speed reducer, a high-speed reducer and a disc self-braking motor. The low-speed reducer, the high-speed reducer and the disc self-braking motor control the rotation of the sprocket to control the chain 10 to lift.

[0042] Working principle: Use the chain 10 on the stressed side to lift the heavy object. Under the action of the gravity of the heavy object, the non-stressed side of the hoist rises, and the wall panel 9 rotates around the hook shaft 2 until the center line of the hook shaft 2 is in line with or very close to the plumb line of the chain 10; the dial plate 6 rotates around the support rod under the action of the hook frame dial shaft 3, and the dial plate 6 drives the guide wheel frame 7 while rotating, and the guide wheel frame 7 drives the guide wheel 8 to slide along the guide groove 901 of the wall panel 9, so that the guide wheel 8 on the stressed side is away from the lifting chain 10 on the stressed side, and the guide wheel 8 on the non-stressed side is close to the lifting chain 10 on the non-stressed side. The stress-side guide wheel 8 is away from the lifting chain 10 to avoid interference with the chain 10, and the non-stress-side guide wheel 8 is close to the lifting chain 10 to press the lifting chain 10 to prevent the lifting chain 10 from slipping out of the lifting sprocket. In this way, the lifting chains 10 on both sides of the hoist can be used for lifting.

[0043] The above is a schematic description of the present invention and its implementation methods, which is not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and creatively designs a structure and an embodiment similar to the technical solution without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A chain electric hoist, It is characterized in that Including hook frame, chain, swing mechanism and wall panel, A hook frame, the hook frame is rotatably connected to the wall panel, and a section of volume extends from the connection between the hook frame and the wall panel and is rotatably connected to the swing mechanism; A chain, wherein the chain is wound around a sprocket; The swing mechanism comprises a guide wheel frame and a guide wheel, wherein the guide wheel frame is a symmetrical structure, a rotation connection structure is provided between the guide wheel frame and the hook frame, the connection point of the rotation connection structure is located on the symmetry axis of the guide wheel frame, the guide wheel is rotationally connected to the symmetrical two ends of the guide wheel frame, and the guide wheel is provided with a shaft; A wall panel, wherein the wall panel is provided with a guide groove, wherein the guide groove cooperates with the shaft of the guide wheel to form a limiting structure, wherein the shaft of the guide wheel is slidably connected to the wall panel, and the guide groove is an arc-shaped structure; The rotating connection structure includes a shifting plate, a support rod and a shifting shaft, and the two ends of the shifting plate are rotatably connected to the hook frame and the guide wheel frame through the shifting shaft; There is a height difference between the connection point of the rotating connection structure and the connection point of the guide wheel, and the connection point of the rotating connection structure is higher than the connection point of the guide wheel.

2. The electric chain hoist according to claim 1, It is characterized in that The wall panel is provided with a limiting column, and the guide wheel frame is provided with a notch. The limiting column cooperates with the notch, the notch is arc-shaped, and the length of the notch is less than or equal to the length of the guide groove.

3. The electric chain hoist according to claim 1, It is characterized in that A support column is arranged inside the wall panel, and the support column is fixedly connected to the wall panel.

4. The electric chain hoist according to claim 1, It is characterized in that The wall panel is provided with a sprocket, and the chain is wound around the sprocket.

5. The electric chain hoist according to claim 1, It is characterized in that A side of the guide wheel frame close to the sprocket is arc-shaped.

6. The electric chain hoist according to claim 1, It is characterized in that An annular groove is arranged in the middle of the guide wheel, and the annular groove is U-shaped.

7. An electric chain hoist according to any one of claims 1 to 6, It is characterized in that The wall panel is a double-layer plate structure, and the hook frame, the swing mechanism, the wall panel and the chain are located between the double-layer plate structure.

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