Movable portable lifting device

Abstract

The application discloses a portable lifting device, which comprises a base, a support column, a horizontal beam and an operating assembly. The support column is provided with a first rotating shaft. The horizontal beam is hinged to the support column through a horizontal second rotating shaft. The horizontal beam is provided with the operating assembly at one end. The operating assembly comprises an operating rod, a rope reel and a rocker arm limiting piece. The rocker arm limiting piece comprises a vertical rod, a horizontal rod and an extension rod. The end of the extension rod is provided with a hook-shaped member for maintaining the distance between the rope reel and the rocker arm. The device overcomes the problems of the existing lifting device, such as unsuitable for narrow working sites, dependence on power, inconvenient steering and the like. The first rotating shaft is arranged in the middle of the support column, and the horizontal beam is connected through the second rotating shaft, so that the horizontal beam can be freely rotated vertically and horizontally. The operation is flexible and efficient. Through the cooperation between the rope reel rocker arm and the rocker arm limiting piece, the lifting rope can be quickly wound up, and the horizontal beam can be operated to carry heavy objects. The device occupies small space, is convenient and efficient to operate, does not depend on power, and one person can complete the heavy object carrying.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of construction equipment, in particular to a portable lifting device. BACKGROUND

[0002] In engineering construction, object carrying is often involved, and lifting equipment needs to be used when moving some objects with large weight, especially when carrying up and down.

[0003] Lifting equipment is generally a standard configuration of a construction site, however, the existing lifting equipment usually has a large volume and needs a large activity space, and in a small working area, such large mechanical equipment is limited in entering and using, or when the engineering quantity is small, there is no need to use large mechanical equipment, because the economy is poor, and using manual carrying is inefficient and leads to long time consumption and delay of construction period, at this time, lifting equipment still needs to be used, but the equipment is required to have a small volume and good lifting performance. Chinese Patent Publication No. CN205045732U, published on February 24, 2016, entitled "Portable Lifting Device" discloses a lifting device, which comprises a machine box, a lifting mast, a hoisting mechanical arm, and a winch mechanism. The winch motor works after being powered by a storage battery, and drives the lifting hook to move up and down through a steel wire rope to lift heavy objects. However, the lifting device provided by this patent uses a winch to lift, and the battery power cannot be guaranteed during lifting operation, and the lifting position is often not convenient for wire arrangement, so the applicability of the device is limited, and the device uses a hook to move up and down, and when carrying objects, in addition to lifting the objects upward, horizontal translation is often needed for loading, stacking, and other operations. The inflexible steering mode makes the operation very inconvenient. SUMMARY

[0004] The present application overcomes the problems of the existing lifting device, such as not applicable to narrow working sites, dependent on power source, inconvenient steering, etc., and provides a portable lifting device. The first rotating shaft is arranged in the middle of the support column, and the second rotating shaft is connected to the cross beam, so as to realize the vertical and horizontal free rotation of the cross beam, which is flexible and efficient in operation. Through the cooperation between the rope disc rocker arm and the rocker arm limiting piece, the lifting rope can be quickly wound up, and the cross beam can be operated to carry heavy objects. The device occupies small space, is convenient and efficient to operate, and does not depend on power source, so one person can complete the carrying of heavy objects.

[0005] In order to achieve the above purpose, the present application adopts the following scheme:

[0006] The portable lifting device comprises:

[0007] a base;

[0008] a support column comprising a lower end column body fixed on the base and an upper end column body coaxially connected to the lower end column body through a first rotating shaft;

[0009] a crossbeam, the middle part of the beam body of which is hingedly connected to the upper end column body through a horizontal second rotating shaft, one end of the crossbeam being provided with a first supporting pulley and the other end being provided with an operating assembly;

[0010] the operating assembly comprising an operating rod, a pair of rope discs and a rocker arm limiting piece, the operating rod being horizontally arranged and fixed perpendicularly to the crossbeam, the shafts of the pair of rope discs being symmetrically connected to the two ends of the operating rod, the lifting rope wound in the rope discs being hung on the weight to be moved after passing through the first supporting pulley, the two rope discs being oppositely rotated when the rope is unwound and each being provided with a rope disc rocker arm on the upper side, the rocker arm limiting piece comprising a vertical rod, a horizontal rod and an extension rod, the lower end of the vertical rod being slidingly sleeved on the crossbeam and the upper end being connected to the middle part of the horizontal rod, the pair of extension rods being respectively connected to the two ends of the horizontal rod and extending towards the rope discs, the ends of the extension rods being provided with hook-shaped members for maintaining the distance between the rope disc rocker arms.

[0011] Preferably, the two rope discs and the shafts thereof are integrally arranged, the shafts being rotatably penetrated through the operating rod, the lower ends of the two shafts being provided with gears of the same size which can be driven by each other.

[0012] Preferably, the gears of the two shafts are indirectly driven by an even number of transmission gears of the same size.

[0013] Preferably, the middle part of the crossbeam is provided with a second supporting pulley for supporting the lifting rope.

[0014] Preferably, the ends of the lifting rope are connected to the lower side of the crossbeam, a movable pulley being slidingly arranged on the lifting rope, a movable hook being connected to the movable pulley and a lifting basket for placing the weight being hung on the movable hook.

[0015] Preferably, one end of the crossbeam close to the weight is provided with a fixed hook, the ends of the lifting rope being hung on the fixed hook.

[0016] Preferably, one end of the crossbeam connected to the operating rod is provided with a counterweight hook for hanging a counterweight.

[0017] Preferably, a blocking block for limiting the sliding distance of the rocker arm limiting piece is arranged on the crossbeam between the vertical rod of the rocker arm limiting piece and the support column.

[0018] Preferably, a movable pulley block and a telescopic supporting piece are arranged under the base, the telescopic supporting piece comprising a supporting pad at the lower end and an adjustable threaded rod screwed into the base at the upper end.

[0019] The present application at least includes the following beneficial effects: (1) by setting the first rotation shaft in the longitudinal direction and the second rotation shaft in the transverse direction, the transverse and vertical free rotation of the cross beam can be realized, the lifting and translation of the object are carried out, and the operation mode is flexible and efficient; (2) by sliding the rocker limiting piece forward and backward, the rope disc rocker is limited or unlocked, so that the rope disc rocker can be used as a handle for operating the cross beam after tightening the lifting rope, the device structure is compact, the operation is more coherent, and only one person can complete the lifting operation; (3) the device structure is simple, small in size, and small in space occupation, the pulley is arranged on the base to facilitate entering the narrow space for work, and when the object with small single weight is carried, the device has high economic applicability; (4) the device uses the double rope disc structure, unifies the operation parts of tightening the lifting rope, pressing down the lifting and horizontally moving the carried object as the rope disc rocker, does not need to use an additional energy supply device, can be used at any time, and can better adapt to the working environment with limited conditions. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a side structure schematic diagram of the present application;

[0021] Figure 2 It is a front structure schematic diagram of the present application;

[0022] Figure 3 It is a top view structure schematic diagram of the present application.

[0023] In the figure: base 1, support column 2, first rotation shaft 3, cross beam 4, second rotation shaft 5, first support pulley 6, operating rod 7, rope disc 8, rope disc rocker 9, vertical rod 10, horizontal rod 11, extension rod 12, hook-shaped component 13, lifting rope 14, gear 15, second support pulley 16, movable pulley 17, movable hook 18, lifting basket 19, fixed hook 20, counterweight hook 21, blocking block 22, movable pulley block 23, telescopic support 24. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the present application according to the description and the drawings.

[0025] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0026] It should be noted that the experimental methods described in the following embodiments are conventional methods, and the materials described are commercially available unless otherwise specified. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "arranging" should be understood broadly, for example, they can be fixedly connected, arranged, or detachably connected, arranged, or integrally connected, arranged. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. The orientations or positional relationships indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] As shown in Figures 1-3 The movable portable lifting device provided by the present application comprises:

[0028] The base 1 is generally rectangular and has a large base weight to make the device more stable during lifting. The device can be transported conveniently in the form of a trolley or with pulleys, and can be placed stably on the ground without shaking. A horizontal balance adjusting structure can be appropriately arranged at the bottom to adapt to different terrains.

[0029] The support column 2 comprises a lower end column body and an upper end column body. The lower end column body is fixed to the base 1, and the upper end column body is coaxially and rotatably connected to the lower end column body through a first rotating shaft 3. The lower end column body of the support column 2 can be integrally connected to the base 1. The column body is divided into upper and lower parts from the middle and connected by the first rotating shaft 3. The first rotating shaft 3 is vertically arranged at the center position of the support column 2. When the device is used, the lateral swinging of the cross beam 4 is realized by the rotation of the upper end column body on the lower end column body.

[0030] The cross beam 4 is hingedly connected to the upper end column body through a horizontal second rotating shaft 5 in the middle of the beam body. One end of the cross beam 4 is provided with a first supporting pulley 6, and the other end is provided with an operating assembly. The top of the upper end column body is in the structure of two opposite supporting plates. The second rotating shaft 5 is arranged between the supporting plates and passes through the middle of the cross beam 4. The specific position of passing through the cross beam 4 is adjusted and designed according to the requirements during actual use, so as to meet the requirements of the lever structure of the lifting device. The end of the cross beam 4 provided with the first supporting pulley 6 is used for suspending a heavy object.

[0031] The operation assembly comprises an operation rod 7, a rope disc 8 and a rocker limiting member, the operation rod 7 is horizontally arranged and fixed perpendicularly to the crossbeam 4, the shafts of a pair of rope discs 8 are symmetrically connected to the two ends of the operation rod 7, the lifting rope 14 wound in the rope disc 8 is hung to the weight to be transferred after passing through the first supporting pulley 6, the two rope discs 8 rotate in opposite directions when releasing the rope and the upper sides of the two rope discs 8 are provided with rope disc rockers 9, the rocker limiting member comprises a vertical rod 10, a horizontal rod 11 and an extension rod 12, the lower end of the vertical rod 10 is slidingly sleeved on the crossbeam 4 and the upper end is connected to the middle of the horizontal rod 11, the two ends of the horizontal rod 11 are respectively connected to the extension rods 12 which extend towards the rope discs 8, and the ends of the extension rods 12 are provided with hook-shaped members 13 for keeping the distance of the rope disc rockers 9. The end of the crossbeam 4 connected to the operation rod 7 can be provided with a structure for hanging the counterweight, the operation rod 7 is a rectangular rod, the shaft of the rope disc 8 passes through the rod body of the operation rod 7, at least one of the rope disc 8 and its shaft or the shaft and the operation rod 7 is in a relative rotating relationship, the vertical rod 10 of the rocker limiting member is sleeved on the crossbeam 4 and is close to or away from the rope disc 8 by sliding on the crossbeam 4, the rope disc rocker 9 appears the maximum distance and the minimum distance with the rotation of the pair of rope discs 8, the distance between the two extension rods 12 is between the maximum distance and the minimum distance, and the value close to the distance between the shafts of the two rope discs 8 is the best, the hook-shaped member 13 at the end of the extension rod 12 is a structure which is bent twice at right angles inward, when the crossbeam 4 passes the horizontal position by pressing down the operation rod 7, the extension rod 12 will naturally slide to the rope disc 8 and hook the rope disc rocker 9 from both sides by the hook-shaped member 13, preventing the rope disc rocker 9 from rotating in the direction of releasing the rope, keeping the extension length of the lifting rope 14 to lift the object, when the object is released, the operation rod 7 is raised, the rope disc rocker 9 is rotated to be separated from the hook-shaped member 13 and the extension rod 12, the rocker limiting member is slidingly reset, and the rope disc 8 can be rotated to release the lifting rope 14.

[0032] When the device is used to lift and carry heavy objects, first loosen the rope by shaking the rope disc rocker 9, make the lifting rope 14 loose, put the carrier with heavy objects on the ground and hang the upper end of it on the lifting rope 14, tighten the lifting rope 14 to the appropriate length by shaking the rope disc rocker 9, continue to hold the rope disc rocker 9 and press down the operating rod 7, make the rocker limiting piece slide to the rope disc 8, the hook-shaped members 13 at both ends hook the rope disc rocker 9 to keep a certain distance, so that the rope disc 8 cannot rotate. For example, the wire is released from the opposite side of the two rope discs 8, when the rope disc rocker 9 is turned to the front position and clamped into the rocker limiting piece, due to the tension of the lifting rope 14 under the action of the heavy object, the left side rope disc rocker 9 has a tendency to rotate counterclockwise, and the right side rope disc rocker 9 has a tendency to rotate clockwise, so there is a tendency to expand the distance between the two rope disc rockers, but the rope disc rocker 9 cannot continue to pull away due to the limitation of the rocker limiting piece, so the rope disc 8 will not rotate. Then press the operating rod 7 down a distance to lift the heavy object off the ground, turn the cross beam 4 to transfer the heavy object to the target position, then lower it, lift the operating rod 7 to loosen the lifting rope 14, turn the rope disc rocker 9 to the center to make the rocker limiting piece disengage and slide back to its original position, then take the heavy object off the lifting rope 14. Turn the cross beam 4 back to the vicinity of the remaining heavy object to be carried, and repeat the operation to achieve the lifting and carrying of heavy objects.

[0033] The device can realize the horizontal and vertical free rotation of the cross beam 4 by setting the first longitudinal rotating shaft 3 and the second transverse rotating shaft 5, so as to lift and translate the object, and the operation is flexible and efficient; before and after carrying the heavy object, the front and rear sliding of the rocker limiting piece limits or releases the distance between the rope disc rockers 9, so as to limit or unlock, so that the rocker can be used as a handle to operate the cross beam 4 after tightening the lifting rope 14, the device structure is compact and the operation is more coherent, only one person is needed to complete the lifting operation; the device structure is simple and small in size, compared with the frame-shaped hoisting structure, the lever structure used by the device occupies less space, the pulley is arranged on the base 1 to facilitate the work in a small space, and it is suitable for carrying small single objects, reducing the use and transportation cost of the device; the device uses a double rope disc structure, which unifies the operation parts of tightening the lifting rope 14, pressing down and lifting, and horizontally moving and carrying the object as the rope disc rocker 9, and the device does not need to use an additional energy supply device, which can be used at any time, and is more suitable for working environment with limited conditions.

[0034] In another technical solution, as shown in Figure 3 The two rope discs 8 and their shafts are integrally arranged, the shafts are rotatably arranged through the operating rod 7, and the lower ends of the two shafts are provided with same size gears 15 which can drive each other. The rope disc 8 and its shaft rotate synchronously, the rotation of the lower end of the shaft is limited by the gear, the rotation mode of the rope disc 8 can be limited, and the same size gears 15 are used for transmission, so that the two rope discs 8 rotate at the same speed, and the lifting ropes 14 controlled by the two rope discs 8 are synchronously wound and unwound.

[0035] The two said shafts are indirectly driven by even number of same size transmission gears 15. The transmission by even number of gears 15 can ensure the opposite rotation direction of the two rope drums 8, if the rope winding position of the rope drums 8 is in opposite position, by clockwise rotation of the left rope drum 8 and counterclockwise rotation of the right rope drum 8, the tightening of the hoisting rope 14 is realized, and the reverse operation realizes the lengthening and relaxation of the hoisting rope 14. Through the meshing transmission of the gears 15, the cooperation between the two rope drum swing arms 9 can balance the force difference of the two hands, and better operation experience is achieved. The use of indirect transmission can reduce the size of the single gear 15, reduce the protruding amount of the gear 15 to the end of the cross beam 4, and avoid the accidental collision of the gear 15 with the operator.

[0036] In another technical solution, as shown in Figure 2 The middle part of the cross beam 4 is provided with a second supporting pulley 16 for supporting the hoisting rope 14. The second supporting pulley 16 is located between the rope drum 8 and the first supporting pulley 6, and can be arranged on the cross beam 4 at the position of the second rotating shaft 5. The height of the cross beam 4 is adjusted to support the hoisting rope 14 to have a certain turning direction. By arranging the second supporting pulley 16, the pulling direction of the hoisting rope 14 can be changed, and the distance close to the rope drum 8 can prevent the hoisting rope 14 from slipping. The second supporting pulley 16 can also share the supporting force of the first supporting pulley 6 on the hoisting rope 14.

[0037] One end of the cross beam 4 connected to the operating rod 7 is provided with a counterweight hook 21 for hanging counterweight. By arranging the counterweight hook 21, a certain amount of counterweight can be hung, which can expand the weight range of the lifting object and make the operator operate more labor-saving.

[0038] In another technical solution, as shown in Figure 1 The end of the hoisting rope 14 is connected to the lower side of the cross beam 4, and a movable pulley 17 is slidably arranged on the hoisting rope 14. The movable pulley 17 is connected to a movable hook 18, and the movable hook 18 is hung with a basket 19 for placing heavy objects. By connecting the end of the hoisting rope 14 to the lower side of the cross beam 4 and using the movable pulley 17, the two ends of the hoisting rope 14 can share the pulling force, and the hoisting process is more stable.

[0039] The end of the cross beam 4 close to the heavy object is provided with a fixed hook 20, and the end of the hoisting rope 14 is hung on the fixed hook 20. The position of the fixed hook 20 is the lower side of the end of the cross beam 4, and the hoisting rope 14 can be hung on or taken off the fixed hook 20, which is convenient for replacing and adjusting the movable pulley 17.

[0040] In another technical solution, a blocking block 22 for limiting the sliding distance of the swing arm limiting piece is arranged on the cross beam 4 between the vertical rod 10 of the swing arm limiting piece and the support column 2. The blocking block 22 blocks the vertical rod 10 of the swing arm limiting piece to prevent the swing arm limiting piece from being too far away from the rope drum 8 and affecting the operation efficiency.

[0041] The base 1 is provided with a mobile pulley block 23 and a telescopic support 24, which comprises a support pad at the lower end and an adjustable threaded rod screwed into the base 1 at the upper end. By adjusting the exposed length of the threaded rod, the mobile pulley block 23 or the telescopic support 24 can be switched to touch the ground, facilitating quick movement or stable placement of the device.

[0042] The number of devices and the scale of the processes described herein are used to simplify the description of the application. Applications, modifications and variations of the application will be apparent to those skilled in the art.

[0043] Although embodiments of the application have been disclosed in connection with the specified embodiments, it should be understood that they can be applied in various fields of the application, and that additional modifications and changes can be made by those skilled in the art without departing from the scope of the application, which is defined by the claims and their equivalents.

Claims

1. A portable lifting device, characterized in that, include: Base; The support column includes a lower column and an upper column. The lower column is fixed to the base, and the upper column is rotatably connected to the lower column via a first rotating shaft. A crossbeam, the middle of which is hinged to the upper column via a horizontal second pivot, has a first support pulley at one end and an operating component at the other end; The operating components include an operating lever, a rope reel, and a rocker arm limiting component. The operating lever is horizontally positioned and fixed perpendicularly to the crossbeam. The core shafts of a pair of rope reels are symmetrically connected to both ends of the operating lever. The lifting rope wound inside the rope reel suspends the weight to be transferred after passing through the first support pulley. The two rope reels rotate in opposite directions when releasing the rope, and each has a rope reel rocker arm on its upper side. The rocker arm limiting component includes a vertical rod, a horizontal rod, and an extension rod. The lower end of the vertical rod is slidably sleeved on the crossbeam, and the upper end is connected to the middle of the horizontal rod. A pair of extension rods are respectively connected to both ends of the horizontal rod and extend towards the rope reel. The ends of the extension rods are provided with hook-shaped components for maintaining the distance between the rope reel rocker arms.

2. The portable lifting device according to claim 1, characterized in that, Both of the rope reels and their spindles are integrally formed, and the spindles rotatably pass through the operating lever. The lower ends of the two spindles are provided with gears of the same size that can drive each other.

3. The portable lifting device according to claim 2, characterized in that, The gears on the two spindles are indirectly driven by an even number of transmission gears of the same size.

4. The portable lifting device according to claim 1, characterized in that, A second support pulley for supporting the suspension rope is provided in the middle of the crossbeam.

5. The portable lifting device according to claim 1, characterized in that, The end of the hoisting rope is connected to the underside of the crossbeam. A movable pulley is slidably mounted on the hoisting rope. A movable hook is connected to the movable pulley, and a basket for placing heavy objects is hung on the movable hook.

6. The portable lifting device according to claim 5, characterized in that, A fixed hook is provided at one end of the crossbeam near the heavy object, and the end of the lifting rope is hung on the fixed hook.

7. The portable lifting device according to claim 1, characterized in that, One end of the crossbeam connected to the operating rod is equipped with a counterweight hook for suspending counterweights.

8. The portable lifting device according to claim 1, characterized in that, A blocking block is provided on the crossbeam between the vertical rod of the rocker arm limiting member and the support column to limit the sliding distance of the rocker arm limiting member.

9. The portable lifting device according to claim 1, characterized in that, The base is provided with a movable pulley system and a telescopic support component. The telescopic support component includes a support pad at the lower end and an adjustable threaded rod at the upper end that is screwed into the base.

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