Flat type traction rope electric hoist without rope length limitation

Abstract

The utility model discloses a flat type traction rope electric hoist without limitation of rope length, belongs to the technical field of electric hoists, solves the problem that the highest point which can be lifted by a heavy object is affected due to the fact that the electric hoist occupies a large space in the vertical direction, and mainly adopts the technical scheme that the flat type traction rope electric hoist without limitation of rope length is used for solving the problem. Comprising a machine shell, a pressing wheel assembly, two rollers installed on the machine shell and a driving mechanism for driving the two rollers, the two rollers are in transmission connection to achieve synchronous rotation, multiple circles of rope grooves for winding a traction rope are formed in the rollers, the pressing wheel assembly acts on the traction rope so that the traction rope can be kept tensioned, one end of the traction rope is a traction end for hanging a heavy object, and the other end of the traction rope is a free end. The rollers are provided with rotating axes, the rollers rotate around the rotating axes, an output shaft of the driving mechanism and the rotating axes of the two rollers are located on the same horizontal plane, and the traction end of the traction rope is located below the two rollers. The heavy object lifting device is mainly used for lifting heavy objects to be higher.

Description

Technical Field

[0001] The utility model discloses a flat electric hoist with a traction rope and unlimited rope length, belonging to the technical field of electric hoists. Background Art

[0002] An electric hoist is a lifting equipment that integrates an electric motor, a friction drum and a rope storage drum. During the use of the electric hoist, the rope storage drum is used to provide tension for the wire rope on the one hand, and to wind the wire rope on the other hand. When the electric hoist is used in a high-altitude environment, in order to meet the lifting height of the electric hoist, the rope storage drum is usually enlarged, thereby increasing the length of the wire rope. However, when working at high altitude, the longer the wire rope is, the more layers are wound on the rope storage drum. At this time, the volume of the electric hoist will inevitably increase, compressing the high-altitude working space and increasing the difficulty of operation.

[0003] In order to meet the needs of aerial work, there is an electric hoist with no restriction on the length of the traction rope. However, the overall structure of the existing electric hoist is relatively complex and the size is relatively large. In aerial work, the electric hoist is usually fixed at the top of the working area. When the weight is lifted to the highest point, the weight needs to be rotated from the outside to the inside of the working area. However, when the electric hoist is large in size and occupies a large space in the vertical direction, the highest point that the weight can be lifted will be lowered, which may cause the weight to be unable to completely rise above the guardrail of the working area, resulting in the weight being unable to be easily rotated into the working area. The weight needs to be moved into the working area manually, affecting the efficiency of carrying the weight. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the electric hoist occupies a large space in the vertical direction, which affects the highest point that the heavy object can be lifted. For this purpose, a flat traction rope electric hoist with unlimited rope length is provided, which reduces the space occupied by the electric hoist in the vertical direction and can lift the heavy object higher.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A flat electric hoist with a traction rope of unlimited rope length comprises a casing, a pressure wheel assembly, two rollers mounted on the casing and a driving mechanism for driving the two rollers. The two rollers are connected by transmission to achieve synchronous rotation. The rollers are provided with a plurality of rope grooves for winding the traction rope. The pressure wheel assembly acts on the traction rope to keep the traction rope taut. One end of the traction rope is a traction end for hanging a heavy object, and the other end is a free end. The roller has a rotation axis, and the roller rotates around the rotation axis. The output shaft of the driving mechanism and the rotation axes of the two rollers are in the same horizontal plane, and the traction end of the traction rope is below the two rollers.

[0007] The beneficial effects of adopting the utility model are:

[0008] In the present utility model, the output shaft of the driving mechanism and the rotation axes of the two drums are all in the same horizontal plane, that is, the driving mechanism and the two drums are all laid flat on the same plane, so that the overall housing is flat. The height of the housing in the vertical direction is close to the maximum height of the driving mechanism and the two drums, which can greatly reduce the space occupied by the housing in the vertical direction. Furthermore, the highest point that the heavy object can be lifted can be increased. When the heavy object reaches the highest point, the bottom of the heavy object can be higher than the guardrail of the working area, so that the heavy object can be easily rotated from the outside of the guardrail to the inside of the guardrail. Then, the heavy object is lowered by the electric hoist, and the handling of the heavy object can be completed. During the handling of the heavy object, the use of manual handling is reduced, making the handling of the heavy object easier and more labor-saving, and having higher safety.

[0009] Preferably, a connecting seat for installing the housing is provided at the top of the housing, and the connecting seat is directly above the traction end. With the foregoing technical solution, during the process of the electric hoist lifting the heavy object, the load center of gravity of the electric hoist is on the traction rope where the traction end is located. The electric hoist is hung by the connecting seat, and the connecting seat is directly above the traction end, that is, the force application point at the top of the electric hoist and the load center of gravity are in the same vertical direction, making the overall force of the electric hoist more uniform. Furthermore, the housing can be kept stable, which helps to improve the operating safety of the electric hoist; in addition, it can also make the bottom surface of the housing as horizontal as possible, thereby reducing the space occupied by the housing in the vertical direction and providing a higher lifting height for the heavy object, so as to facilitate the subsequent handling of the heavy object.

[0010] Preferably, the drum is provided with a rotating shaft, the rotating shaft rotates synchronously with the drum, and the output shaft of the driving mechanism coincides with the rotating shaft and is fixedly connected to the rotating shaft.

[0011] Preferably, the driving mechanism is on one side of one of the drums, and the part where the traction end enters the rope groove is between the driving mechanism and the drum. With the foregoing technical solution, the traction end rises and falls between the driving mechanism and the drum, that is, the load center of gravity of the electric hoist is between the driving mechanism and the drum, and the driving mechanism can play a balancing role, making the overall housing as horizontal as possible, reducing the possibility of the electric hoist tipping over during operation, and making the use of the electric hoist safer and more reliable.

[0012] Preferably, the drum is provided with a rotating shaft, the rotating shaft rotates synchronously with the drum, a driven gear is fixed on the rotating shaft, an output gear is provided on the output shaft of the driving motor, and a first transmission gear is rotatably connected in the housing. The first transmission gear meshes with the driven gear and the output gear at the same time to realize the transmission connection between the output shaft and the rotating shaft.

[0013] Preferably, the drum is provided with a rotating shaft which rotates synchronously with the drum. A driven gear is fixed on the rotating shaft. A second transmission gear is rotatably connected in the machine shell and meshes with the two driven gears simultaneously to realize the transmission connection of the two drums.

[0014] Preferably, the press wheel assembly includes a connecting shaft, a reset member, and a press wheel rotatably arranged on the connecting shaft. The press wheel presses the traction rope to form a static friction between the traction rope and the drum. One end of the reset member is fixed to the connecting shaft, and the other end is fixed to the machine shell, so that the connecting shaft has a tendency to move towards the drum. A sliding hole for the connecting shaft to slide is provided on the machine shell. With the foregoing technical solution, the reset member can keep the press wheel in stable contact with the traction rope, and at the same time can increase the pressure of the press wheel on the traction rope, effectively reducing the possibility of slipping between the traction rope and the rope groove. In addition, the distance between the press wheel and the rope groove can be flexibly adapted by the reset member. When replacing the traction rope with different diameters, the reset member can automatically adapt the diameter of the press wheel to the traction rope and keep stable contact with the traction rope, without adjusting the position of the connecting shaft, which can improve the replacement efficiency of the traction rope and also improve the use safety of the electric hoist.

[0015] Preferably, in the vertical direction, the position of the press wheel assembly is higher than the position of the drum rotating shaft. With the foregoing technical solution, the press wheel assembly can use its own gravity to increase the pressure on the traction rope, further making the traction rope fit more closely with the rope groove and enabling the traction rope to have a greater load capacity.

[0016] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present invention with reference to the drawings:

[0018] Figure 1 is a schematic structural view of a flat traction rope electric hoist with unlimited rope length according to the present invention;

[0019] Figure 2 is a schematic structural view of the interior of the machine shell of a flat traction rope electric hoist with unlimited rope length according to the present invention;

[0020] Figure 3 is a front view of a flat traction rope electric hoist with unlimited rope length according to the present invention.

[0021] Reference numerals: 1, housing; 11, connecting seat; 2, driving mechanism; 21, output gear; 221, first transmission gear; 222, second transmission gear; 31, first roller; 311, first driven gear; 32, second roller; 321, second driven gear; 33, rope groove; 4, towing rope; 41, towing end; 42, free end; 5, pressing wheel assembly; 51, connecting shaft; 52, pressing wheel. Detailed implementation manners

[0022] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 thus cannot be understood as a limitation to the present utility model.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise clearly defined.

[0025] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] As Figures 1 to 3As shown, this embodiment discloses an electric hoist with a traction rope 4 that has an unlimited rope length, including a housing 1, a pressure wheel assembly 5, two drums installed on the housing 1, and a driving mechanism 2 for driving the two drums. The two drums are in transmission connection to achieve synchronous rotation. The drums are provided with multiple turns of rope grooves 33 around which the traction rope 4 is wound. The pressure wheel assembly 5 acts on the traction rope 4 to keep the traction rope 4 taut. One end of the traction rope 4 is a traction end 41 for hanging a heavy object, and the other end is a free end 42. The drum has a rotation axis, and the drum rotates around the rotation axis. The output shaft of the driving mechanism 2 and the rotation axes of the two drums are all in the same horizontal plane, and the traction end 41 of the traction rope 4 is below the two drums.

[0027] In this embodiment, the output shaft of the driving mechanism 2 and the rotation axes of the two drums are all in the same horizontal plane, that is, the driving mechanism 2 and the two drums are all laid flat on the same plane. As a result, the overall housing 1 is in a flat shape, and the height of the housing 1 in the vertical direction is close to the maximum height of the driving mechanism 2 and the two drums. This can greatly reduce the space occupied by the housing 1 in the vertical direction, and thus can increase the highest point to which the heavy object can be lifted. When the heavy object reaches the highest point, the bottom of the heavy object can be higher than the guardrail of the working area, enabling the heavy object to easily rotate from the outside of the guardrail to the inside of the guardrail. Then, by lowering the heavy object through the electric hoist, the handling of the heavy object can be completed. During the handling of the heavy object, the use of manual handling is reduced, making the handling of the heavy object easier, more labor-saving, and safer.

[0028] As Figure 1 shown, in this embodiment, the two drums are respectively a first drum 31 and a second drum 32. The output shaft of the driving mechanism 2 is rotationally connected to the rotation shaft of the first drum 31, and the rotation shaft of the first drum 31 is in transmission connection with the rotation shaft of the second drum 32. When the driving mechanism 2 is started, it drives the first drum 31 to rotate, and the first drum 31 drives the second drum 32 to rotate through the rotation shaft, thereby realizing the synchronous rotation of the first drum 31 and the second drum 32. In this embodiment, the output shaft of the driving mechanism 2, the rotation shaft of the first drum 31, and the rotation shaft of the second drum 32 are all in the same horizontal plane, that is, the driving mechanism 2, the first drum 31, and the second drum 32 are arranged in the same horizontal plane. When the heights of the driving mechanism 2, the first drum 31, and the second drum 32 in the vertical direction are the same, the height of the housing 1 in the vertical direction depends on the height of one of the driving mechanism 2, the first drum 31, and the second drum 32. When the heights of the driving mechanism 2, the first drum 31, and the second drum 32 in the vertical direction are different, the height of the housing 1 in the vertical direction depends on the maximum height of the driving mechanism 2, the first drum 31, and the second drum 32, thereby greatly reducing the space occupied by the housing 1 in the vertical direction and increasing the highest point to which the heavy object can be lifted.

[0029] As Figure 1 andFigure 2 As shown, the driving mechanism 2 in this embodiment is located on one side of the first roller 31, and the position where the traction end 41 enters the rope groove 33 is located between the driving mechanism 2 and the first roller 31. The arrangement direction of the driving mechanism 2, the first roller 31 and the second roller 32 is perpendicular to the length direction of the rotating shaft. The traction end 41 of the traction rope 4 rises and falls between the driving mechanism 2 and the roller, that is, the load center of gravity of the electric hoist is located between the driving mechanism 2 and the roller. The driving mechanism 2 can play a balancing role, so that the overall casing 1 is kept as horizontal as possible, reducing the possibility of the electric hoist flipping during operation, making the use of the electric hoist safer and more reliable.

[0030] The first roller 31 and its rotating shaft are connected to each other through a spline, and the rotating shaft of the first roller 31 is connected to the housing 1 for rotation. A first driven gear 311 is fixed on the rotating shaft of the first roller 31, and the second roller 32 and its rotating shaft are also connected to each other through a spline for synchronous rotation. The rotating shaft of the second roller 32 is also connected to the housing 1 for rotation. A second driven gear 321 is fixed on the rotating shaft of the second roller 32. The output end of the driving mechanism 2 is connected to a reduction gear box for transmission. One end of the reduction gear box is connected to the output end of the driving mechanism 2, and the other end is provided with an output gear 21. The housing 1 is connected to a first transmission gear 221 and a second transmission gear 222 for rotation. The first transmission gear 221 is located between the output gear 21 and the first driven gear 311, and the first transmission gear 221 is meshed with the output gear 21 and the first driven gear 311 at the same time. When the driving mechanism 2 is started, the power is transmitted to the output gear 21 through the reduction gear box. The output gear 21 rotates and drives the first driven gear 311 to rotate through the first transmission gear 221; the second transmission gear 222 is located between the output gear 21 and the first driven gear 311. The second transmission gear 222 is meshed with the first driven gear 311 and the second driven gear 321 at the same time. The first driven gear 311 rotates through the second transmission gear 222 to drive the second driven gear 321 to rotate, thereby realizing the synchronous and same-direction rotation of the first drum 31 and the second drum 32. During the winding process, the traction rope 4 is wound along the rope groove 33 of the first drum 31 to the top of the first drum 31, and then the traction rope 4 is separated from the first drum 31. The traction rope 4 is then separated from the rope groove 33 of the second drum 32 and returns to the rope groove 33 of the first drum 31. After the traction rope 4 is repeatedly wound between the first drum 31 and the second drum 32, the traction end 41 of the traction rope 4 is separated from the rope groove 33 of the first drum 31 and extends vertically downward, and the free end 42 of the traction rope 4 is separated from the rope groove 33 of the second drum 32 and extends vertically downward.

[0031] Of course, it can be understood that in other embodiments, the output shaft of the driving mechanism 2 can also coincide with the rotating shaft of the first drum 31, that is, the output shaft of the driving mechanism 2 and the rotating shaft of the first drum 31 are on the same straight line. The output end of the driving mechanism 2 is connected with a speed reducer. One end of the speed reducer is in transmission connection with the output end of the driving mechanism 2, and the other end is in transmission connection with the rotating shaft of the first drum 31.

[0032] Of course, it can be understood that in other embodiments, the first driven gear 311 and the second driven gear 321 can also be directly meshed to achieve transmission connection. Furthermore, the setting of the second transmission gear 222 can be omitted. The driving mechanism 2 drives the rotating shaft of the first drum 31 to rotate. The first driven gear 311 on the rotating shaft rotates accordingly. At the same time, the first driven gear 311 drives the second driven gear 321 to rotate, and the second driven gear 321 drives the second drum 32 to rotate, thereby realizing the synchronous reverse rotation of the first drum 31 and the second drum 32. The traction rope 4 is wound in an "8" shape around the first drum 31 and the second drum 32. This winding method can increase the contact area between the traction rope 4 and the rope groove 33, thereby increasing the friction between the traction rope 4 and the rope groove 33 and enabling the traction rope 4 to have a greater load-bearing capacity.

[0033] As Figure 3 shown, in this embodiment, a connection seat 11 for installing the housing 1 is provided at the top of the housing 1. The connection seat 11 is directly above the traction end 41. During the process of the electric hoist lifting a heavy object, the load center of gravity of the electric hoist is on the traction rope 4 where the traction end 41 is located. The electric hoist is hung through the connection seat 11, and the connection seat 11 is directly above the traction end 41, that is, the force application point at the top of the electric hoist and the load center of gravity are in the same vertical direction, making the overall force of the electric hoist more uniform. Furthermore, it can keep the housing 1 stable, which helps to improve the operating safety of the electric hoist; in addition, it can also make the bottom surface of the housing 1 as horizontal as possible, thereby reducing the space occupied by the housing 1 in the vertical direction and providing a higher lifting height for the heavy object to facilitate the subsequent handling of the heavy object.

[0034] As Figure 2As shown in the figure, in this embodiment, the pressure wheel assembly 5 is located on one side of the second drum 32. In the vertical direction, the position of the pressure wheel assembly 5 is higher than the position of the axis of the second drum 32. In addition, the pressure wheel assembly 5 includes a connecting shaft 51, a reset member, and a pressure wheel 52 rotatably disposed on the connecting shaft 51. The pressure wheel 52 presses the traction rope 4 to form a static friction between the traction rope 4 and the drum. One end of the reset member is fixed to the connecting shaft 51, and the other end is fixed to the machine housing 1, so that the connecting shaft 51 has a tendency to move towards the drum. A sliding hole for the connecting shaft 51 to slide is provided on the machine housing 1, and the connecting shaft 51 is slidably connected to the sliding hole. In this embodiment, the reset member can keep the pressure wheel 52 in stable contact with the traction rope 4, and at the same time can increase the pressure of the pressure wheel 52 on the traction rope 4, effectively reducing the possibility of slipping between the traction rope 4 and the rope groove 33; in addition, the distance between the pressure wheel 52 and the rope groove 33 can be flexibly adapted by the reset member. After replacing the traction rope 4 with a different diameter, the reset member can automatically adapt the diameter of the pressure wheel 52 to the traction rope 4 and keep stable contact with the traction rope 4, without adjusting the position of the connecting shaft 51, which can improve the replacement efficiency of the traction rope 4 and also improve the safety of using the electric hoist; secondly, the lowest end of the pressure wheel assembly 5 is higher than the axis of the second drum 32. When the pressure wheel assembly 5 acts on the traction rope 4, the pressure wheel assembly 5 can use its own gravity to increase the pressure on the traction rope 4, further making the traction rope 4 fit more closely with the rope groove 33 and enabling the traction rope 4 to have a greater load capacity.

[0035] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A flat electric hoist with unlimited rope length, comprising a housing, a pressure wheel assembly, two rollers mounted on the housing and a driving mechanism driving the two rollers, the two rollers are connected in a transmission manner to achieve synchronous rotation, the rollers are provided with a plurality of rope grooves for winding the traction rope, the pressure wheel assembly acts on the traction rope to keep the traction rope taut, one end of the traction rope is a traction end for hanging a heavy object, and the other end is a free end, characterized in that: The roller has a rotation axis, and the roller rotates around the rotation axis. The output shaft of the driving mechanism and the rotation axes of the two rollers are both in the same horizontal plane, and the traction end of the traction rope is below the two rollers.

2. A flat type electric hoist with unlimited rope length according to claim 1, characterized in that: A connecting seat for installing the casing is provided at the top end of the casing, and the connecting seat is located just above the traction end.

3. A flat electric hoist with unlimited rope length according to claim 1, characterized in that: The drum is provided with a rotating shaft, the rotating shaft rotates synchronously with the drum, the output shaft of the driving mechanism coincides with the rotating shaft, and the output shaft of the driving mechanism is fixedly connected with the rotating shaft.

4. A flat electric hoist with unlimited rope length according to claim 1, characterized in that: The driving mechanism is located on one side of one of the drums, and the position where the traction end enters the rope groove is located between the driving mechanism and the drum.

5. A flat electric hoist with unlimited rope length according to claim 4, characterized in that: The drum is provided with a rotating shaft, which rotates synchronously with the drum, a driven gear is fixed on the rotating shaft, an output shaft of the driving motor is provided with an output gear, a first transmission gear is rotatably connected in the casing, and the first transmission gear is meshed with the driven gear and the output gear at the same time to realize the transmission connection between the output shaft and the rotating shaft.

6. A flat electric hoist with unlimited rope length according to claim 3 or 4, characterized in that: The drum is provided with a rotating shaft, which rotates synchronously with the drum, a driven gear is fixed on the rotating shaft, a second transmission gear is rotatably connected in the housing, and the second transmission gear is meshed with two driven gears at the same time to realize the transmission connection between the two drums.

7. A flat electric hoist with unlimited rope length according to claim 1, characterized in that: The pressure wheel assembly includes a connecting shaft, a reset member and a pressure wheel rotatably arranged on the connecting shaft. The pressure wheel presses the traction rope so that the traction rope forms static friction with the drum. One end of the reset member is fixed to the connecting shaft, and the other end is fixed to the casing so that the connecting shaft has a tendency to move toward the drum. A sliding hole is provided on the casing for the connecting shaft to slide.

8. A flat electric hoist with unlimited rope length according to claim 7, characterized in that: In the vertical direction, the position of the pressure wheel assembly is higher than the position of the roller shaft.

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