Duplex winding drum lifting electric hoist

Abstract

A duplex winding drum lifting electric hoist comprises a supporting plate, a walking mechanism is fixed to the upper end of the supporting plate and assembled on an I-shaped steel rail, a supporting frame is fixed to the lower end of the supporting plate, and a first lifting winding drum and a second lifting winding drum are fixed to the supporting frame. A lifting motor and a speed reducer are assembled at the two ends of the first lifting winding drum and the two ends of the second lifting winding drum respectively, a first gear is fixed to the middle of the first lifting winding drum, a second gear coaxial with the second lifting winding drum is fixed to the middle of the second lifting winding drum, and the first gear and the second gear are meshed with each other. A lifting hook is arranged below the supporting frame, a movable pulley block is assembled at the upper end of the lifting hook, a steel wire rope is arranged between the movable pulley block and the first lifting drum and the second lifting drum, one end of the steel wire rope is connected to the first lifting drum, and the other end of the steel wire rope bypasses the movable pulley block to be connected to the second lifting drum. The device is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of cranes, and in particular relates to a double-drum lifting electric hoist. Background Art

[0002] An electric hoist is a lifting device, which is assembled on the I-beam track under the crane beam through a walking mechanism. The electric hoist has the characteristics of small size, light weight, simple operation and convenient use, and is used in industrial and mining enterprises, warehouses, docks and other places; for example, the Chinese patent with the authorization announcement number: CN210236887U discloses a fixed structure of a crane electric hoist. The existing electric hoists are generally the same as the structure of the appealed patent, and all include a lifting drum, a lifting motor, a reducer and a hook connected to the lifting drum by a wire rope assembled on a support frame, one end of the wire rope is fixed on the support frame, and the other end of the wire rope is connected to the lifting drum by bypassing the movable pulley group at the upper end of the hook. When in use, the lifting drum is driven to rotate by starting the lifting motor, and the lifting drum pulls the hook by winding the wire rope; the technical problems existing in the prior art are: first, the range of the hook lifting height is short and the lifting speed is slow; second, when the lifting motor is damaged, the hook and the heavy object on the hook cannot be lifted or dropped in time. Therefore, in the prior art, the electric hoist has the technical problems of small lifting range when in use and the hook cannot be dropped in time after the lifting motor is damaged. Utility Model Content

[0003] In order to solve the technical problems that the lifting range of the hook of the existing electric hoist is small and the hook cannot fall in time after the lifting motor is damaged, the utility model provides a double-drum lifting electric hoist, including a horizontally arranged support plate arranged below the I-beam track, a travel mechanism is detachably fixed on the upper end of the support plate, and the travel mechanism is movably assembled on the I-beam track. The travel mechanism includes two sets of vertical plates symmetrically arranged on both sides of the I-beam track, the vertical plates play a supporting and fixing role, and the lower ends of the two vertical plates are detachably fixedly connected by a fixing rod. One of the vertical plates is rotatably equipped with two spaced driving wheels through a support shaft, the driving wheel is roller-pressed on the I-beam track, and a transmission gear ring is provided at one end of the driving wheel away from the I-beam track. A travel motor is fixed on the outer side of the vertical plate, and the power output shaft of the travel motor extends to the inner side of the vertical plate, and is connected to the two driving wheels through a gear assembly. A driven wheel is rotatably equipped on the vertical plate on the other side of the I-beam track, and the driven wheel is roller-pressed on the I-beam track. When the travel motor is started, the travel motor drives the driving wheel to rotate, and the driving wheel moves along the I-beam track. A support frame is fixed to the lower end of the support plate, and two horizontally arranged first lifting drums and a second lifting drum are detachably fixed on the support frame. The support frame includes two vertical and spaced fixed plates, the upper ends of the two fixed plates are detachably fixedly connected by an upper support beam, and the lower ends of the two fixed plates are detachably fixedly connected by a lower support beam, and both ends of the first lifting drum and the second lifting drum can be rotatably assembled between the two fixed plates. The two ends of the first lifting drum and the second lifting drum are respectively equipped with a lifting motor and a reducer, a first gear which is coaxial with the first lifting drum is fixed in the middle of the first lifting drum, and a second gear which is coaxial with the second lifting drum is fixed in the middle of the second lifting drum, and the first gear and the second gear are meshed with each other, and the two lifting motors are started at the same time, and the lifting motor drives the first lifting drum and the second lifting drum to rotate towards each other, the wire rope is released from the first lifting drum and the second lifting drum, and the hook moves downward under the traction of the wire rope. Since the first lifting drum and the second lifting drum retract and release the wire rope at the same time, the lifting speed of the hook can be increased and the efficiency can be improved. The two lifting motors are started in reverse, and the lifting motor drives the first lifting drum and the second lifting drum to rotate in reverse directions, the first lifting drum and the second lifting drum are wound with the wire rope and pull the hook upward. When one of the lifting motors fails and is damaged, the first lifting drum and the second lifting drum are driven to rotate synchronously by the other lifting motor, which can ensure the normal retraction and release of the wire rope and increase safety. A hook is provided under the support frame, and a movable pulley block is installed at the upper end of the hook. Two symmetrically arranged steel wire ropes are provided between the movable pulley block and the first lifting drum and the second lifting drum. One end of the steel wire rope is connected to the first lifting drum, and the other end of the steel wire rope passes around the movable pulley block and is connected to the second lifting drum.

[0004] Preferably, the lifting motor on the first lifting drum is located at the left end of the first lifting drum, and the lifting motor on the second lifting drum is located at the right end of the second lifting drum, ensuring that when the two motors rotate in the same direction, the rotation directions of the first lifting drum and the second lifting drum are opposite, which is convenient for retracting and releasing the wire rope.

[0005] Preferably, the upper end of the support plate is sleeved on the fixing rod, and a sleeve is sleeved on the fixing rod between the support plate and the vertical plate; the end of the fixing rod is threadedly connected with a fixing bolt.

[0006] Preferably, a rope guide is provided on the first lifting drum on both sides of the first gear; a rope guide is provided on the second lifting drum on both sides of the second gear. The rope guide is a prior art and can ensure that the wire rope is wound along the wire rope grooves on the first lifting drum and the second lifting drum, thereby preventing the wire rope from escaping from the rope grooves.

[0007] Preferably, a protective plate is provided between the upper support beam and the lower support beam, and the protective plate is located on the outer sides of the first gear and the second gear.

[0008] The above solution has the following advantages:

[0009] The setting of the first lifting drum and the second lifting drum can realize synchronous reverse rotation of the first lifting drum and the second lifting drum under the power of the two lifting motors, realize synchronous retraction and release of the wire rope, and can retract and release the wire rope in two directions, thereby improving the lifting speed of the hook; the first gear set on the first lifting drum and the second gear set on the second lifting drum are meshed with each other, so that when one of the lifting motors fails, the first lifting drum and the second lifting drum can be driven to rotate synchronously by the other lifting motor that can work normally, thereby realizing synchronous retraction and release of the wire rope and improving safety; the setting of the walking mechanism can drive the support frame to move back and forth freely along the length direction of the I-beam track. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0011] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0012] Figure 3 This is a schematic diagram of the main structure of the utility model;

[0013] Figure 4 It is a left-side structural schematic diagram of the utility model;

[0014] Figure 5 It is a schematic diagram of the top view structure of the utility model;

[0015] Figure 6 for Figure 1 Enlarged view of part A.

[0016] Figure numerals: 1. I-beam rail; 2. walking mechanism; 3. support frame; 4. first lifting drum; 5. second lifting drum; 6. hook; 11. support plate; 21. vertical plate; 22. fixing rod; 221. fixing bolt; 222. sleeve; 23. driving wheel; 231. transmission gear ring; 232. support shaft; 24. walking motor; 241. gear assembly; 25. driven wheel; 31. fixing plate; 32. upper support beam; 33. lower support beam; 34. protective plate; 41. first gear; 43. rope guide; 51. second gear; 52. lifting motor; 53. reducer; 61. movable pulley block; 62. wire rope. DETAILED DESCRIPTION

[0017] like Figure 1-6As shown, a double-drum lifting electric hoist includes a horizontally arranged support plate 11 arranged below an I-beam track 1, and a traveling mechanism 2 is detachably fixed to the upper end of the support plate 11. The traveling mechanism 2 can be movably assembled on the I-beam track 1. The traveling mechanism 2 includes two groups of vertical plates 21 symmetrically arranged on both sides of the I-beam track 1. The vertical plates 21 play a supporting and fixing role, and the lower ends of the two vertical plates 21 are detachably fixedly connected by a fixing rod 22. One of the vertical plates 21 is rotatably equipped with two spaced driving wheels 23 through a support shaft 232. The driving wheel 23 is roll-fitted on the I-beam track 1. A transmission gear ring 231 is provided at one end of the driving wheel 23 away from the I-beam track 1. A travel motor 24 is fixed to the outer side of the vertical plate 21. The power output shaft of the travel motor 24 extends to the inner side of the vertical plate 21 and is transmission-connected to the two driving wheels 23 through a gear assembly 241. A driven wheel 25 is rotatably equipped on the vertical plate 21 on the other side of the I-beam track 1. The driven wheel 25 is roll-fitted on the I-beam track 1. When the travel motor 24 is started, the travel motor 24 drives the driving wheel 23 to rotate, and the driving wheel 23 moves along the I-beam track 1. A support frame 3 is fixed to the lower end of the support plate 11, and two horizontally arranged first lifting drums 4 and second lifting drums 5 are detachably fixed on the support frame 3. The support frame 3 includes two vertical and spaced fixed plates 31. The upper ends of the two fixed plates 31 are detachably fixedly connected by an upper support beam 32, and the lower ends of the two fixed plates 31 are detachably fixedly connected by a lower support beam 33, and both ends of the first lifting drum 4 and the second lifting drum 5 can be rotatably assembled between the two fixed plates 31. The two ends of the first lifting drum 4 and the second lifting drum 5 are respectively equipped with a lifting motor 52 and a reducer 53. A first gear 41 coaxially arranged with the first lifting drum 4 is fixed in the middle of the first lifting drum 4, and a second gear 51 coaxially arranged with the second lifting drum 5 is fixed in the middle of the second lifting drum 5, and the first gear 41 and the second gear 51 are meshed with each other. The two lifting motors 52 are started at the same time, and the lifting motors 52 drive the first lifting drum 4 and the second lifting drum 5 to rotate in opposite directions. The wire rope 62 is released from the first lifting drum 4 and the second lifting drum 5, and the hook 6 is on the wire rope 6 2 moves downward under the traction of the first lifting drum 4 and the second lifting drum 5. Since the first lifting drum 4 and the second lifting drum 5 retract and release the wire rope 62 at the same time, the lifting speed of the hook 6 can be increased to improve efficiency. The two lifting motors 52 are started in reverse, and the lifting motors 52 drive the first lifting drum 4 and the second lifting drum 5 to rotate in opposite directions. The first lifting drum 4 and the second lifting drum 5 are wound with the wire rope 62 and pull the hook 6 to move upward. When one of the lifting motors 52 fails, the other lifting motor 52 drives the first lifting drum 4 and the second lifting drum 5 to rotate synchronously, which can ensure the normal retraction and release of the wire rope 62 and increase safety.A hook 6 is provided below the support frame 3, and a movable pulley set 61 is installed at the upper end of the hook 6. Two symmetrically arranged steel wire ropes 62 are provided between the movable pulley set 61 and the first lifting drum 4 and the second lifting drum 5. One end of the steel wire rope 62 is connected to the first lifting drum 4, and the other end of the steel wire rope 62 passes around the movable pulley set 61 and is connected to the second lifting drum 5.

[0018] Preferably, the lifting motor 52 on the first lifting drum 4 is located at the left end of the first lifting drum 4, and the lifting motor 52 on the second lifting drum 5 is located at the right end of the second lifting drum 5, ensuring that when the two lifting motors 52 rotate in the same direction, the rotation directions of the first lifting drum 4 and the second lifting drum 5 are opposite, which is convenient for retracting and releasing the wire rope 62.

[0019] Preferably, the upper end of the support plate 11 is sleeved on the fixing rod 22 , and a sleeve 222 is sleeved on the fixing rod 22 between the support plate 11 and the vertical plate 21 ; the end of the fixing rod 22 is threadedly connected with a fixing bolt 221 .

[0020] Preferably, a rope guide 43 is provided on the first lifting drum 4 on both sides of the first gear 41; a rope guide 43 is provided on the second lifting drum 5 on both sides of the second gear 51. The rope guide 43 is a prior art, which can ensure that the wire rope 62 is wound along the rope grooves of the wire rope 62 on the first lifting drum 4 and the second lifting drum 5, thereby preventing the wire rope 62 from escaping from the rope grooves.

[0021] Preferably, a protective plate 34 is provided between the upper support beam 32 and the lower support beam 33 , and the protective plate 34 is located outside the first gear 41 and the second gear 51 .

[0022] Usage process:

[0023] When the utility model is in use, the travel motor 24 is started, the travel motor 24 drives the driving wheel 23 to rotate along the I-beam track 1, and drives the hook 6 to move to the top of the heavy object to be lifted, and then the travel motor 24 is stopped, and the two lifting motors 52 are started at the same time, and the lifting motors 52 drive the first lifting drum 4 and the second lifting drum 5 to rotate towards each other, and the wire rope 62 is released from the first lifting drum 4 and the second lifting drum 5, and the hook 6 moves down under the traction of the wire rope 62, and waits for the hook 6 to move down to the top of the heavy object to be lifted. When the lifting motor 52 is near a heavy object, the worker hangs the hook 6 on the heavy object, and then starts the two lifting motors 52 in reverse. The lifting motor 52 drives the first lifting drum 4 and the second lifting drum 5 to rotate in opposite directions. The first lifting drum 4 and the second lifting drum 5 are wound around the wire rope 62 and pull the hook 6 upward. When one of the lifting motors 52 fails, the other lifting motor 52 drives the first lifting drum 4 and the second lifting drum 5 to rotate synchronously, which can ensure the normal retraction and release of the wire rope 62 and increase safety.

[0024] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "top", "bottom", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 should not be understood as a limitation on the present invention.

[0025] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A double-drum lifting electric hoist, comprising a horizontally arranged support plate arranged below an I-beam track, a travel mechanism detachably fixed to the upper end of the support plate, the travel mechanism movably assembled on the I-beam track, a support frame fixed to the lower end of the support plate, characterized in that: Two horizontally arranged first lifting drums and a second lifting drum are detachably fixed on the supporting frame, and lifting motors and reducers are respectively installed at both ends of the first lifting drum and the second lifting drum, a first gear coaxially arranged with the first lifting drum is fixed in the middle of the first lifting drum, and a second gear coaxially arranged with the second lifting drum is fixed in the middle of the second lifting drum, and the first gear and the second gear are meshed with each other; a hook is provided at the bottom of the supporting frame, and a movable pulley block is installed at the upper end of the hook, and two symmetrically arranged steel wire ropes are provided between the movable pulley block and the first lifting drum and the second lifting drum, one end of the steel wire rope is connected to the first lifting drum, and the other end of the steel wire rope passes around the movable pulley block and is connected to the second lifting drum.

2. The double drum hoist electric hoist according to claim 1, characterized in that: The lifting motor on the first lifting drum is located at the left end of the first lifting drum, and the lifting motor on the second lifting drum is located at the right end of the second lifting drum.

3. The double drum hoist electric hoist according to claim 1, characterized in that: The walking mechanism includes two groups of vertical plates symmetrically arranged on both sides of the I-beam track. The lower ends of the two vertical plates are detachably fixedly connected by a fixing rod. One of the vertical plates is rotatably equipped with two driving wheels arranged at intervals. The driving wheels are roller-fitted on the I-beam track. A transmission gear ring is provided at the end of the driving wheel away from the I-beam track. A walking motor is fixed on the outer side of the vertical plate. The power output shaft of the walking motor extends to the inner side of the vertical plate and is connected to the two driving wheels through a gear assembly. A driven wheel is rotatably equipped on the vertical plate on the other side of the I-beam track, and the driven wheel is roller-fitted on the I-beam track.

4. The double drum hoist electric hoist according to claim 3 is characterized in that: The upper end of the support plate is sleeved on the fixing rod, and a sleeve is sleeved on the fixing rod between the support plate and the vertical plate; the end of the fixing rod is threadedly connected with a fixing bolt.

5. The double drum hoist electric hoist according to claim 1, characterized in that: Rope guides are provided on the first lifting drums on both sides of the first gear; rope guides are provided on the second lifting drums on both sides of the second gear.

6. The double drum hoist electric hoist according to claim 1, characterized in that: The support frame includes two vertical and spaced apart fixing plates, the upper ends of the two fixing plates are detachably fixedly connected via an upper supporting beam, the lower ends of the two fixing plates are detachably fixedly connected via a lower supporting beam, and both ends of the first lifting drum and the second lifting drum can be rotatably assembled between the two fixing plates.

7. The double drum hoist electric hoist according to claim 6, characterized in that: A protective plate is arranged between the upper support beam and the lower support beam, and the protective plate is located at the outer sides of the first gear and the second gear.

Images