Balanced lifting beam for lifting building boards

Abstract

The invention discloses a balance lifting beam for lifting building boards, and relates to the technical field of lifting slings, the balance lifting beam comprises a beam frame, a first lifting frame and a second lifting frame, the top of the first lifting frame and the top of the second lifting frame are provided with a first adjusting block and a second adjusting block respectively; adjusting holes are formed in the center of the first adjusting block and the center of the second adjusting block, internal threads are arranged on the inner circle face of the adjusting hole of the second adjusting block, a clamping groove penetrating through the top is formed in the center of the first adjusting block, and mounting grooves coaxial with the adjusting holes are formed in the two sides of the inner wall of the clamping groove. And an internal thread ring is arranged in the mounting groove. According to the lifting appliance, the first clamping block, the second clamping block and the hydraulic cylinder are arranged on the first lifting frame, in the process of adjusting the balance of the lifting appliance, the lifting points on one side can be independently adjusted, the lifting points on the two sides can also be adjusted at the same time, the two lifting points can be adjusted in the opposite or same direction at the same time, and use is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting appliances, and more particularly to a balance lifting beam for lifting building boards. Background Art

[0002] The balance beam is an important part of lifting equipment and is widely used in lifting projects. The balance beam is also called an iron shoulder pole. It can be used to keep the lifted equipment balanced, avoid damage to the equipment by the sling; shorten the height of the sling, reduce the lifting height of the movable pulley; reduce the horizontal pressure borne by the equipment during lifting, and avoid damage to the equipment; when multiple machines are used for lifting, the balance beam can also reasonably distribute or balance the loads at each lifting point.

[0003] When the existing balance lifting beam hoists boards, in order to maintain balance, the lifting points on the lifting appliance can usually be adjusted. Currently, there are two adjustment methods: manual and automatic. Manual adjustment is time-consuming and laborious, while most automatic adjustments can only adjust the two-sided lifting points in the same direction and at the same time, which is inconvenient to use.

[0004] Therefore, it is very necessary to propose a balance lifting beam for lifting building boards to solve the above problems. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] The purpose of the present invention is to provide a balance lifting beam for lifting building boards to solve the problems that manual adjustment is time-consuming and laborious, while most automatic adjustments can only adjust the two-sided lifting points in the same direction and at the same time, which is inconvenient to use.

[0007] (2) Technical Solutions

[0008] The present invention specifically adopts the following technical solutions to achieve the above purposes:

[0009] A balance lifting beam for lifting building boards, comprising a beam frame, a first lifting bracket and a second lifting bracket. The tops of the first lifting bracket and the second lifting bracket are respectively provided with a first adjusting block and a second adjusting block. Adjusting holes are opened at the centers of the first adjusting block and the second adjusting block. Internal threads are provided on the inner circular surface of the adjusting hole of the second adjusting block. A clamping groove penetrating through the top is opened at the center of the first adjusting block. Installation grooves coaxial with the adjusting hole are opened on both sides of the inner wall of the clamping groove. An internal thread ring is arranged inside the installation groove. Thrust bearings are arranged at both ends of the internal thread ring located inside the installation groove. A first clamping block is movably sleeved at the bottom of the clamping groove, and a second clamping block is movably sleeved at the top of the clamping groove. The first clamping block and the second clamping block are distributed on the upper and lower sides of the internal thread ring. Arc-shaped grooves are opened at the centers of the inner side plates of the first clamping block and the second clamping block. Anti-slip pads are fixedly connected to the inner sides of the arc-shaped grooves. Connecting rods are fixedly connected to the four corners of the inner side plate of the first clamping block. Through holes corresponding to the connecting rods are opened at the four corners of the second clamping block. The connecting rods are movably sleeved in the through holes. The top ends of the connecting rods are fixedly connected with an installation frame. A hydraulic cylinder is fixedly connected to the top surface of the installation frame. The end of the piston rod of the hydraulic cylinder penetrates through the installation frame and is fixedly connected to the second clamping block;

[0010] One end of the beam frame is fixedly connected with a mounting plate, and a reduction motor is fixedly connected to the mounting plate. Vertical block bearings are fixedly connected to both ends of the top surface of the beam frame. A transmission shaft is fixedly connected to the inner ring of the bearing of the vertical block bearing. One end of the transmission shaft is fixedly connected to the output shaft of the reduction motor. External thread parts are arranged on the outer circular surfaces at both ends of the transmission shaft. One end of the transmission shaft located at the first adjusting block is movably sleeved in the adjusting hole, and one end of the transmission shaft located at the second adjusting block is threadedly connected in the adjusting hole.

[0011] Preferably, a reverse thread is arranged at one end of the transmission shaft located at the second lifting bracket. The reverse thread has the same pitch, opposite helix direction as the external thread part at the second lifting bracket, and the two ends are connected by a transition curve.

[0012] Preferably, two slide rails are arranged in parallel on the top of the beam frame. Sliding grooves slidably matched with the slide rails are opened at the tops of the inner walls of the first lifting bracket and the second lifting bracket.

[0013] Preferably, a counterweight frame is fixedly connected to one end of the beam frame, a limiting rod is fixedly connected to the counterweight frame, and a counterweight block is movably sleeved on the limiting rod.

[0014] Preferably, lifting lugs are fixedly connected to the upper and lower ends of the first lifting bracket and the second lifting bracket. The lifting lugs located at the tops of the first lifting bracket and the second lifting bracket incline towards the center of the beam frame.

[0015] Preferably, the outer circumferential surface of the internal thread ring is provided with anti-slip grooves, the inner circumferential surface of the anti-slip pad has the same radian as that of the internal thread ring, and the arc length of the anti-slip pad is less than half of the perimeter of the anti-slip pad.

[0016] (III) Advantageous Effects

[0017] The advantageous effects of the present invention are as follows:

[0018] In the present invention, by providing the first clamping block, the second clamping block and the hydraulic cylinder on the first hanger, during the process of adjusting the balance of the lifting tool, either one side lifting point can be adjusted individually, or both sides lifting points can be adjusted simultaneously, and the two lifting points can be adjusted in opposite or the same directions simultaneously, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an axonometric schematic diagram of the present invention;

[0020] Figure 2 is a complete schematic diagram of the structure of the first hanger of the present invention;

[0021] Figure 3 is an installation schematic diagram of the structure of the hydraulic cylinder of the present invention;

[0022] Figure 4 is an installation schematic diagram of the structure of the internal thread ring of the present invention;

[0023] Figure 5 is a side cross-sectional schematic diagram of the structure of the first hanger of the present invention;

[0024] Figure 6 is an installation schematic diagram of the structure of the anti-slip pad of the present invention;

[0025] Figure 7 is an enlarged schematic diagram of the structure of the second clamping block of the present invention.

[0026] Reference Signs: 1, beam frame; 2, second adjusting block; 3, second hanger; 4, counterweight frame; 5, counterweight block; 6, limiting rod; 7, reverse thread; 8, external thread part; 9, lifting lug; 10, transmission shaft; 11, vertical pedestal bearing; 12, reduction motor; 13, mounting plate; 14, first hanger; 15, slide rail; 16, chute; 17, adjusting hole; 18, first adjusting block; 19, hydraulic cylinder; 20, mounting frame; 21, first clamping block; 22, second clamping block; 23, internal thread ring; 24, card slot; 25, internal thread ring; 26, thrust bearing; 27, mounting groove; 28, through hole; 29, anti-slip pad; 30, arc groove; 31, card slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1-7 , a balance lifting beam for lifting building boards, including a beam frame 1, a first lifting bracket 14 and a second lifting bracket 3. First adjustment blocks 18 and second adjustment blocks 2 are respectively arranged at the tops of the first lifting bracket 14 and the second lifting bracket 3. Adjustment holes 17 are respectively opened at the centers of the first adjustment block 18 and the second adjustment block 2. Internal threads are provided on the inner circular surface of the adjustment hole 17 of the second adjustment block 2. A card slot 31 penetrating the top is opened at the center of the first adjustment block 18. Installation grooves 27 coaxial with the adjustment hole 17 are respectively opened on both sides of the inner wall of the card slot 31. An internal thread ring 23 is arranged inside the installation groove 27. Thrust bearings 26 are arranged at both ends of the internal thread ring 23 located inside the installation groove 27. A first clamping block 21 is movably sleeved at the bottom of the card slot 31, and a second clamping block 22 is movably sleeved at the top of the card slot 31. The first clamping block 21 and the second clamping block 22 are distributed on the upper and lower sides of the internal thread ring 23. Arc-shaped grooves 30 are respectively opened at the centers of the inner side plates of the first clamping block 21 and the second clamping block 22. Anti-slip pads 29 are fixedly connected to the inner sides of the arc-shaped grooves 30. Connecting rods 24 are fixedly connected to the four corners of the inner side plate of the first clamping block 21. Through holes 28 corresponding to the connecting rods 24 are respectively opened at the four corners of the second clamping block 22. The connecting rods 24 are movably sleeved in the through holes 28. The top ends of the connecting rods 24 are fixedly connected to an installation frame 20. A hydraulic cylinder 19 is fixedly connected to the top surface of the installation frame 20. The end of the piston rod of the hydraulic cylinder 19 penetrates the installation frame 20 and is fixedly connected to the second clamping block 22;

[0029] One end of the beam frame 1 is fixedly connected with an installation plate 13. A reduction motor 12 is fixedly connected to the installation plate 13. Vertical block bearings 11 are fixedly connected to both ends of the top surface of the beam frame 1. A transmission shaft 10 is fixedly connected to the inner ring of the bearing of the vertical block bearing 11. One end of the transmission shaft 10 is fixedly connected to the output shaft of the reduction motor 12. External thread portions 8 are respectively arranged on the outer circular surfaces of both ends of the transmission shaft 10. One end of the transmission shaft 10 located at the first adjustment block 18 is movably sleeved in the adjustment hole 17, and one end of the transmission shaft 10 located at the second adjustment block 2 is threadedly connected in the adjustment hole 17.

[0030] When adjusting the balance of the lifting appliance, if only one side of the lifting point needs to be adjusted, the hydraulic cylinder 19 is in a contracted state at this time. The first clamping block 21 and the second clamping block 22 are located at the top and bottom of the clamping groove 31, and the anti-slip pad 29 is separated from the internal thread ring 23. After the reduction motor 12 operates, since the internal thread ring 23 can rotate in the installation groove 27 at this time, when the transmission shaft 10 rotates, due to the sliding friction between the first hanging bracket 14 and the beam frame 1 being greater than the friction between the internal thread ring 23 and the installation groove 27, the internal thread ring 23 will rotate idly, and the first hanging bracket 14 remains stationary. The transmission shaft 10 pushes the second hanging bracket 3 to move. When the second hanging bracket 3 needs to move, the piston rod of the hydraulic cylinder 19 extends. First, the second clamping block 22 is lowered. After the second clamping block 22 contacts the internal thread ring 23, the mounting bracket 20 is pushed upward. The mounting bracket 20 pulls up the first clamping block 21, and as the piston rod of the hydraulic cylinder 19 extends, the internal thread ring 23 is locked, enabling the first hanging bracket 14 and the second hanging bracket 3 to move simultaneously.

[0031] A reverse thread 7 is provided at one end of the transmission shaft 10 located at the second hanging bracket 3. The reverse thread 7 has the same pitch, opposite helix direction as the external thread portion 8 at the second hanging bracket 3, and the two ends are connected by a transition curve.

[0032] The external thread portion 8 and the reverse thread 7 form a reciprocating lead screw structure. When it is necessary to adjust the movement direction of the second hanging bracket 3 relative to the first hanging bracket 14, first keep the first hanging bracket 14 stationary and make the second hanging bracket 3 move. When the second hanging bracket 3 moves to the end of the external thread portion 8, the second hanging bracket 3 moves in the opposite direction, enabling the first hanging bracket 14 and the second hanging bracket 3 to move in the same or opposite directions.

[0033] Two slide rails 15 are arranged in parallel at the top of the beam frame 1. The inner walls of the tops of the first hanging bracket 14 and the second hanging bracket 3 are provided with sliding grooves 16 that are slidably matched with the slide rails 15.

[0034] One end of the beam frame 1 is fixedly connected with a counterweight frame 4. A limiting rod 6 is fixedly connected to the counterweight frame 4. A counterweight block 5 is movably sleeved on the limiting rod 6. The counterweight block 5 can not only balance the weight of the reduction motor 12 but also assist in adjusting the balance during the hoisting of the device.

[0035] Lifting lugs 9 are fixedly connected to both the upper and lower ends of the first hanging bracket 14 and the second hanging bracket 3. The lifting lugs 9 located at the tops of the first hanging bracket 14 and the second hanging bracket 3 are inclined towards the center of the beam frame 1. The inclined lifting lugs 9 can prevent the sling from interfering with the hydraulic cylinder 19.

[0036] Anti-slip grooves 25 are provided on the outer circumferential surface of the internal thread ring 23 to increase the friction between the internal thread and the anti-slip pad 29. The inner circumferential surface of the anti-slip pad 29 has the same radian as the internal thread ring 23, and the arc length of the anti-slip pad 29 is less than half of the circumference of the anti-slip pad 29, with a certain gap when clamping to ensure the clamping force.

[0037] In summary, in the present invention, by providing a first clamping block, a second clamping block and a hydraulic cylinder on the first hanger, during the process of adjusting the balance of the lifting tool, one side of the lifting point can be adjusted individually, or both sides of the lifting points can be adjusted simultaneously, and the two lifting points can be adjusted in opposite or the same directions simultaneously, which is more convenient to use.

[0038] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A balanced lifting beam for lifting building panels, characterized in that: The invention comprises a beam frame (1), a first hanger (14) and a second hanger (3), wherein a first adjusting block (18) and a second adjusting block (2) are respectively arranged at the top of the first hanger (14) and the second hanger (3), wherein an adjusting hole (17) is provided at the center of the first adjusting block (18) and the second adjusting block (2), wherein an internal thread is provided on the inner circumferential surface of the adjusting hole (17) of the second adjusting block (2), wherein a clamping groove (31) penetrating the top is provided at the center of the first adjusting block (18), wherein both sides of the inner wall of the clamping groove (31) are provided with mounting grooves (27) coaxial with the adjusting hole (17), wherein an internal thread ring (23) is arranged inside the mounting groove (27), wherein thrust bearings (26) are arranged at both ends of the internal thread ring (23) located in the mounting groove (27), wherein a first clamping block (21) is movably sleeved at the bottom of the clamping groove (31), wherein the clamping groove (31) is provided with a plurality of mounting grooves coaxial with the adjusting hole (17), wherein the first clamping block (21) is movably sleeved at the bottom of the clamping groove (31), wherein the first clamping block (21) is provided with a plurality of mounting grooves coaxial with the adjusting hole (17 ... The top of the first clamping block (21) is movably sleeved with a second clamping block (22), the first clamping block (21) and the second clamping block (22) are distributed on the upper and lower sides of the internal thread ring (23), the inner side plates of the first clamping block (21) and the second clamping block (22) are both provided with an arc groove (30) at the center, the inner side of the arc groove (30) is fixedly connected with an anti-slip pad (29), the four corners of the inner side plate of the first clamping block (21) are all fixedly connected with a connecting rod (24), the four corners of the second clamping block (22) are all provided with a through hole (28) corresponding to the connecting rod (24), the connecting rod (24) is movably sleeved in the through hole (28), the top end of the connecting rod (24) is fixedly connected with a mounting frame (20), the top surface of the mounting frame (20) is fixedly connected with a hydraulic cylinder (19), the piston rod end of the hydraulic cylinder (19) passes through the mounting frame (20) and is fixedly connected to the second clamping block (22); One end of the beam frame (1) is fixedly connected to a mounting plate (13), and a reduction motor (12) is fixedly connected to the mounting plate (13). Both ends of the top surface of the beam frame (1) are fixedly connected to vertical seat bearings (11), and a transmission shaft (10) is fixedly connected to the inner ring of the bearing of the vertical seat bearing (11). One end of the transmission shaft (10) is fixedly connected to the output shaft of the reduction motor (12). External threaded portions (8) are provided on the outer circumferential surfaces at both ends of the transmission shaft (10). One end of the transmission shaft (10) located in the first adjustment block (18) is movably sleeved in the adjustment hole (17), and one end of the transmission shaft (10) located in the second adjustment block (2) is threadedly connected in the adjustment hole (17).

2. A balanced lifting beam for lifting building panels according to claim 1, characterized in that: A reverse thread (7) is arranged at one end of the transmission shaft (10) located at the second hanger (3). The reverse thread (7) has the same pitch as the external thread (8) at the second hanger (3) and has an opposite direction of rotation. Both ends are connected by a transition curve.

3. A balanced lifting beam for lifting building panels according to claim 1, characterized in that: Two slide rails (15) are arranged in parallel on the top of the beam frame (1), and slide grooves (16) which are slidably matched with the slide rails (15) are provided on the top of the inner walls of the first hanger (14) and the second hanger (3).

4. A balanced lifting beam for lifting building panels according to claim 1, characterized in that: One end of the beam frame (1) is fixedly connected to a counterweight frame (4), a limit rod (6) is fixedly connected to the counterweight frame (4), and a counterweight block (5) is movably sleeved on the limit rod (6).

5. A balanced lifting beam for lifting building panels according to claim 1, characterized in that: The upper and lower ends of the first hanger (14) and the second hanger (3) are fixedly connected with lifting ears (9), and the lifting ears (9) located at the top of the first hanger (14) and the second hanger (3) are inclined toward the center of the beam frame (1).

6. A balanced lifting beam for lifting building panels according to claim 1, characterized in that: The outer circumferential surface of the internal thread ring (23) is provided with anti-skid notches (25), the inner circumferential surface of the anti-skid pad (29) has the same arc as that of the internal thread ring (23), and the arc length of the anti-skid pad (29) is less than half of the circumference of the anti-skid pad (29).

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