Design of eccentric bearing suspension arm with adjustable rolling angle

Abstract

The invention relates to a design of an eccentric bearing suspension arm with an adjustable rolling angle, belongs to the technical field of hoisting equipment, and solves the problem that the hoisting equipment in the prior art cannot adjust the rolling angle of a hoisted object. The device comprises a telescopic suspension arm, an end cross beam, a fixed suspension rod, a lifting mechanism and a suspension arm mounting seat, the two groups of telescopic suspension arms are respectively mounted on the two sides of the suspension arm mounting seat; an end part cross beam is fixedly mounted at the end part of the telescopic suspension arm; a fixed suspender is fixedly mounted on one side of the end cross beam, and a lifting mechanism is mounted on the other side; the fixed lifting rod is connected with a fixed lifting point on one side of a lifted object through a first lifting belt, and the lifting mechanism is connected with a liftable lifting point on the other side of the lifted object through a second lifting belt; and when the lifting mechanism extends or retracts, the lifted object can be driven to roll. The lifting arm can adapt to the size of a lifted object, the rolling angle of the lifted object can be adjusted, and the lifting efficiency and the object matching accuracy are improved.

Description

Technical Field

[0001] This invention relates to the field of hoisting equipment technology, and in particular to an adjustable roll angle eccentric load-bearing boom design. Background Technology

[0002] In existing hoisting equipment and methods, the center of the traditional crane arm coincides with the center of the object being hoisted, and the height of the lifting point of the crane arm is fixed. When placing the object, the ground fixed support is not horizontal, and it is necessary to temporarily adjust the height of the lifting points on both sides of the lifting equipment to match the object with the fixed support. The matching and docking of the object with the fixed support is inconvenient and has low accuracy.

[0003] In addition, for cylindrical or cylindrical structural components that need to be docked, the angle of the items needs to be adjusted in advance during hoisting. Adjusting the rolling angle of the items is very inconvenient, and the circumferential angle deviation of the docking items on both sides affects the docking efficiency and docking accuracy.

[0004] Existing lifting devices cannot adjust the roll angle, which greatly limits the lifting speed and efficiency; therefore, there is a need to provide a lifting device structure that can achieve circumferential roll of the lifted object. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide an adjustable roll angle eccentric load-bearing boom design to solve the problem that existing hoisting equipment cannot adjust the angle of the hoisted item, which leads to difficulties in assembling or placing the item.

[0006] The objective of this invention is mainly achieved through the following technical solutions:

[0007] An adjustable roll angle eccentric load-bearing boom includes: a telescopic boom, an end beam, a fixed rod, a lifting mechanism, and a boom mounting base;

[0008] The telescopic boom is provided in two sets, and is respectively installed on both sides of the boom mounting base;

[0009] An end crossbeam is fixedly installed at the end of the telescopic boom;

[0010] A fixed lifting rod is fixedly installed on one side of the end beam, and a lifting mechanism is installed on the other side; the fixed lifting rod is connected to a fixed lifting point on one side of the suspended object through a first lifting strap, and the lifting mechanism is connected to a liftable lifting point on the other side of the suspended object through a second lifting strap; when the lifting mechanism extends or retracts, it can drive the suspended object to roll.

[0011] Furthermore, the telescopic boom and the end beam are assembled in an eccentric T-shape.

[0012] Furthermore, the telescopic boom includes: a first telescopic boom and a second telescopic boom.

[0013] Furthermore, the first telescopic arm is nested in the boom mounting base and can slide and extend relative to the boom mounting base.

[0014] Furthermore, the second telescopic arm is nested within the first telescopic arm and can slide out relative to the first telescopic arm.

[0015] Furthermore, a telescopic cylinder is installed between the first telescopic boom and the boom mounting base. The telescopic cylinder is used to drive the first telescopic boom to extend, and the telescopic rod of the telescopic cylinder is fixedly connected to the first telescopic boom.

[0016] Furthermore, a linear push rod is installed at the end of the telescopic cylinder, which is used to drive the second telescopic arm to extend from the first telescopic arm.

[0017] Furthermore, the two sets of telescopic booms are installed in the boom mounting base in a staggered manner.

[0018] Furthermore, the lead screw of the linear push rod is capable of reciprocating motion; when the lead screw extends, it can drive the second telescopic arm to extend from the first telescopic arm; when the lead screw retracts, it can retract into the telescopic rod of the telescopic cylinder, and the telescopic rod is provided with an axially extending retraction hole inside.

[0019] A lifting method with an adjustable roll angle, comprising using the aforementioned adjustable roll angle eccentric support boom to lift the object being lifted; the lifting method includes:

[0020] Step S1: Adjust the length of the telescopic boom to match the length of the object being lifted;

[0021] Step S2: Connect the first sling between the fixed lifting point of the suspended item and the fixed lifting rod of the end crossbeam; connect the second sling between the lifting point of the suspended item and the lifting mechanism;

[0022] Step S3: Lift the boom mounting base to lift the object being lifted; during lifting, by driving the lifting rod of the lifting mechanism to extend or shorten, the second sling is displaced relative to the first sling, thereby causing the object being lifted to roll.

[0023] The technical solution of this invention can achieve at least one of the following effects:

[0024] 1. The adjustable roll angle eccentric load-bearing telescopic boom of the present invention, through the design of a telescopic boom structure, can achieve at least two levels of multi-stage boom telescopic extension, meeting the lifting length requirements for different lifting items.

[0025] 2. The adjustable roll angle eccentric load-bearing telescopic boom design of the present invention adopts an eccentric structure arrangement between the center of the boom and the lifting point to meet the spatial arrangement requirements of the height direction of the lifted object; at the same time, the eccentric boom design allows both sets of telescopic booms to retract into the boom mounting base, and can achieve a more stable lifting effect.

[0026] 3. The adjustable roll angle eccentric load-bearing telescopic boom design of the present invention, by setting the left and right lifting points to adopt a combination of fixed lifting points and lifting points respectively, meets the requirement of adjustable roll angle of the lifted object. During the cooperation between the lifted object and the fixed support or the cooperation between the lifted object and the assembly / connection object, the roll angle of the lifted object can be adjusted in real time to achieve higher lifting efficiency and more accurate alignment.

[0027] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0028] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0029] Figure 1 This is a schematic diagram of the hoisting state of the adjustable roll angle eccentric load-bearing telescopic boom of the present invention;

[0030] Figure 2 This is a front view of the adjustable roll angle eccentric load-bearing telescopic boom of the present invention in its hoisting state;

[0031] Figure 3 This is a side view of the adjustable roll angle eccentric load-bearing telescopic boom of the present invention in its hoisting state;

[0032] Figure 4 This is a schematic diagram of the structural composition of the adjustable roll angle eccentric load-bearing telescopic arm of the present invention;

[0033] Figure 5 This is a schematic diagram of the extended state of the adjustable roll angle eccentric load-bearing telescopic arm of the present invention.

[0034] Figure 6 This is a schematic diagram of the lifting mechanism of the adjustable roll angle eccentric load telescopic arm of the present invention.

[0035] Figure 7This is a side view of the lifting mechanism of the adjustable roll angle eccentric load telescopic boom of the present invention - perpendicular to the boom direction;

[0036] Figure 8 This is a side view of the lifting mechanism of the adjustable roll angle eccentric load telescopic boom of the present invention - parallel to the boom direction;

[0037] Figure 9 The lifting state of the adjustable roll angle eccentric load telescopic boom of the present invention is the state where the length of the object being lifted is greater than the length of the boom.

[0038] Figure 10 This refers to the hoisting state of the adjustable roll angle eccentric load-bearing telescopic boom of the present invention – the rolling state of the hoisted object.

[0039] Figure label:

[0040] 1-First telescopic boom; 2-Second telescopic boom; 3-Telescopic cylinder; 4-End crossbeam; 5-Fixed lifting point; 6-Liftable lifting point; 7-Lifting mechanism; 8-Lifted item; 9-Boom mounting base; 10-First sling; 11-Second sling; 12-Linear push rod; 13-Retraction hole; 14-Screw rod; 15-Fixed boom;

[0041] 701-Lifting platform; 702-Lifting rod; 703-Pin shaft; 704-Roller mounting base; 705-Roller; 706-Liftable lifting rod. Detailed Implementation

[0042] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0043] Example 1

[0044] A specific embodiment of the present invention discloses an adjustable roll angle eccentric load-bearing boom design, such as... Figure 1 , Figure 2 As shown, it includes: a telescopic boom, an end beam 4, a fixed rod 15, a lifting mechanism 7, and a boom mounting base 9; the telescopic boom has two sets, which are respectively installed on both sides of the boom mounting base 9; the end beam 4 is fixedly installed at the end of the telescopic boom; a fixed rod 15 is fixedly installed on one side of the end beam 4, and a lifting mechanism 7 is installed on the other side; the fixed rod 15 is connected to a fixed lifting point 5 on one side of the suspended object 8 through a first sling 10, and the lifting mechanism 7 is connected to a liftable lifting point 6 on the other side of the suspended object 8 through a second sling 11; when the lifting mechanism 7 extends or retracts, it can drive the suspended object 8 to roll.

[0045] In one specific embodiment of the present invention, such as Figure 1 , Figure 3 As shown, the telescopic boom and the end beam 4 are assembled in an eccentric T-shape.

[0046] like Figure 1 As shown, the two sets of telescopic booms are installed in the boom mounting base 9 in a staggered manner.

[0047] Specifically, the two sets of telescopic booms are arranged parallel to each other. The boom mounting base 9 has two parallel first telescopic cavities inside. When the two sets of telescopic booms are retracted to their minimum length, they can be stored in the two first telescopic cavities respectively. When the two sets of telescopic booms are extended, they can drive the two end beams 4 at both ends of the booms to move away from each other, adjusting the length of the two telescopic booms to adapt to the length of the suspended object, such as... Figure 1 As shown.

[0048] like Figure 3 As shown, the left side of the suspended item 8 is a fixed lifting point 5, which cannot be raised or lowered; the right side is a lifting point, which uses the vertical lifting motion output by the lifting mechanism 7 to drive the lifting point 6 to move up and down.

[0049] Specifically, the fixed lifting point 5 and the liftable lifting point 6 are supports fixedly installed on both sides of the suspended item 8; or, the fixed lifting point 5 and the liftable lifting point 6 are lifting parts on the suspended item 8; the supports / lifting parts can be connected to the slings (first sling 10 / second sling 11) via hooks.

[0050] Specifically, the first sling 10 and the second sling 11 are of equal length; preferably, both the first sling 10 and the second sling 11 are abbreviated ...

[0051] Specifically, the fixed lifting rod 15 is fixedly installed on one side of the end crossbeam 4, or is an integral structure with the end crossbeam 4. The length of the fixed lifting rod 15 is fixed, so that the position of the first lifting strap 10 relative to the end crossbeam 4 is fixed after hoisting. Specifically, the lifting mechanism 7 is fixedly installed on the other side of the end crossbeam 4. When the end of the lifting mechanism 7 is raised or lowered, it can drive the second lifting strap 11 to move up and down relative to the end crossbeam 4, thereby driving the hoisted object to roll.

[0052] Specifically, the end of the telescopic boom is eccentrically installed between itself and the end beam 4, meaning that the axis of the telescopic boom is offset from the center of symmetry of the end beam 4. Figure 1 , Figure 3 As shown.

[0053] Specifically, each end beam 4 is equipped with a set of fixed suspension rods 15 and a lifting mechanism 7. Correspondingly, two first slings 10 and two second slings 11 are also provided. The two first slings 10 are respectively connected to the two fixed suspension rods 15, and the two second slings 11 are respectively connected to the two lifting mechanisms 7. In this invention, the first slings 10 and the second slings 11 have the same structure and can be used interchangeably.

[0054] Furthermore, such as Figure 1 As shown, the two lifting mechanisms 7 are located on the same side of the boom mounting base 9; that is, the two lifting mechanisms 7 are located on the same side of the suspended object. When the two lifting mechanisms 7 lift synchronously, they can drive the two second slings 11 to deflect and shift synchronously relative to the two first slings 10, thereby causing the suspended object to roll. Figure 1 , Figure 2 , Figure 3 As shown.

[0055] Specifically, both sets of telescopic booms are two-stage telescopic structures.

[0056] In one specific embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the telescopic boom includes a first telescopic arm 1 and a second telescopic arm 2. Specifically, the first telescopic arm 1 is nested in the boom mounting base 9 and can slide out relative to the boom mounting base 9. The second telescopic arm 2 is nested in the first telescopic arm 1 and can slide out relative to the first telescopic arm 1.

[0057] In order to extend the first telescopic arm 1 and the second telescopic arm 2, the present invention provides a telescopic cylinder 3 and a linear push rod 12 as a driving mechanism to drive the first telescopic arm 1 and the second telescopic arm 2 to move, thereby adjusting the length of the telescopic boom.

[0058] Specifically, such as Figure 4 , Figure 5 As shown, a telescopic cylinder 3 is installed between the first telescopic arm 1 and the boom mounting base 9. The telescopic cylinder 3 is used to drive the first telescopic arm 1 to extend out of the first telescopic inner cavity of the boom mounting base 9.

[0059] Specifically, the telescopic rod of the telescopic cylinder 3 is fixedly connected to the first telescopic arm 1. For example... Figure 4 , Figure 5 As shown, the telescopic rods of the telescopic cylinder 3 are arranged side by side on the side of the first telescopic arm 1, and the end of the telescopic rod is flush with the end of the first telescopic arm 1. When the telescopic rod retracts into the telescopic cylinder 3, the first telescopic arm 1 also retracts into the first telescopic inner cavity of the boom mounting seat 9.

[0060] Preferably, the telescopic rod of the telescopic cylinder 3 is driven by hydraulic or pneumatic pressure; or the telescopic rod of the telescopic cylinder 3 is driven by a linear motor.

[0061] Specifically, such as Figure 4 , Figure 5 As shown, a linear push rod 12 is installed at the end of the telescopic cylinder 3. The linear push rod 12 is used to drive the second telescopic arm 2 to extend out from the first telescopic arm 1.

[0062] Specifically, the linear push rod 12 is internally equipped with a ball screw pair / screw-nut pair, with its screw 14 serving as the output end of linear displacement; the linear push rod 12 drives its screw 14 to reciprocate by rotating the nut via its built-in motor; that is, the screw 14 of the linear push rod 12 can reciprocate. Figure 4 As shown.

[0063] The second telescopic arm 2 can slide freely along the second telescopic inner cavity of the first telescopic arm 1, such as... Figure 4 , Figure 5 As shown. Specifically, when the lead screw 14 of the linear push rod 12 extends, it can drive the second telescopic arm 2 to extend out from the first telescopic arm 1; when the lead screw 14 of the linear push rod 12 retracts, it can drive the second telescopic arm 2 to retract into the first telescopic arm 1.

[0064] Furthermore, the telescopic rod is provided with an axially extending retraction hole 13, which is used to accommodate the retracted lead screw 14; when the lead screw 14 retracts, it can retract into the telescopic rod of the telescopic cylinder 3, thereby driving the end beam 4 to approach the end face of the first telescopic arm 1.

[0065] Specifically, the telescopic cylinder 3 and the linear push rod 12 are located on the same straight line and are arranged side by side on one side of the telescopic boom.

[0066] In one specific embodiment of the present invention, such as Figure 6 , Figure 7 , Figure 8As shown, the lifting mechanism 7 includes: a lifting platform 701, a pin 703, a liftable boom 706, and rollers 705. The lifting platform 701 is fixedly mounted on the end beam 4, and the end of the lifting boom 702 of the lifting platform 701 is hinged to the liftable boom 706 via the pin 703. The upper end of the liftable boom 706 is hinged to the lifting boom 702, and the lower end is connected to the second lifting strap 11. The rollers 705 are fixedly mounted on the end beam 4 and located on the side of the liftable boom 706, used to limit the deflection movement of the liftable boom 706, allowing it to move only up and down.

[0067] like Figure 6 As shown, roller 705 is rotatably mounted below end beam 4 via roller support 704 and is located on the side of telescopic boom 706. Specifically, roller 705 is rotatably mounted on roller support 704 via rotating shaft and bearing, and the axis of rotation of roller 705 is perpendicular to telescopic boom.

[0068] Specifically, the lifting mechanism 701 is a pneumatic or hydraulically driven cylinder; or the lifting mechanism is a linear motor or electric push rod. The lifting rod 702 is the output shaft of the lifting mechanism 701, used to output linear displacement.

[0069] Specifically, the elevator 701 is vertically installed on the end beam 4 and is set perpendicular to the second telescopic arm 2.

[0070] like Figure 6 , Figure 7 , Figure 8 As shown, the end of the lifting rod 702 is hinged to the liftable rod 706 via a pin 703, enabling rotation between the liftable rod 706 and the lifting rod 702, that is, the lifting rod 706 can rotate around the pin 703.

[0071] Specifically, the first shaft hole at the end of the lifting rod 702 and the second shaft hole at the end of the liftable boom 706 are hinged together by a pin 703, a bearing, and a locking nut. Preferably, one end of the bearing connected to the liftable boom 706 contacts the side of the end beam 4, and can withstand the tilting off-center load.

[0072] Specifically, the pin 703 passes through both the second shaft hole of the liftable rod 706 and the first shaft hole of the lifting rod 702. Furthermore, the pin 703 is connected to the first shaft hole and the second shaft hole by bearings, so that both the lifting rod 702 and the liftable rod 706 can rotate freely around the pin 703 via the bearings.

[0073] During implementation, since the lifting platform 701 is fixedly installed on the end beam 4, the lifting rod 702 only undergoes vertical displacement relative to the end beam 4 and does not rotate; one end of the liftable rod 706 is hinged to the lifting rod 702, and the other end is connected to the second sling 11. When the second sling 11 deviates, the liftable rod 706 is subjected to the lateral load transmitted by the second sling 11 and tends to rotate around the pin 703. At the same time, the liftable rod 706 is restricted by the roller 705 and will not deflect, and can only move vertically relative to the end beam 4.

[0074] In this invention, by setting the lifting rod 702 to be hinged to the liftable boom 706 and setting the roller 705 on the side of the liftable boom 706, the liftable boom 706 can bear the lateral load transmitted by the second sling 11, while ensuring that the lifting rod 702 of the elevator 701 does not bear the lateral load, thus avoiding damage to the elevator 701.

[0075] Furthermore, such as Figure 6 , Figure 7 , Figure 8 As shown, the axis of the roller 705 is perpendicular to the liftable boom 706, so that when the liftable boom 706 moves up and down, the friction between the two can drive the roller 705 to rotate.

[0076] Furthermore, such as Figure 6 , Figure 7 , Figure 8 As shown, the roller 705 has a drum-shaped structure with an arc-shaped groove on its side. Specifically, the arc-shaped groove is an annular groove arranged around the axis of the roller 705, and its cross-section is arc-shaped.

[0077] Preferably, the arc-shaped groove of the roller 705 is an annular groove with a semi-circular cross-section.

[0078] Furthermore, the lifting rod 706 has an arc surface on the side near the roller 705; the arc surface of the lifting rod 706 can contact the arc-shaped groove of the roller 705.

[0079] In this invention, by setting the arc surface at the front of the liftable boom to contact the arc-shaped groove of the roller 705, it is ensured that the liftable boom 706 can withstand the tilting load force from the second sling 11.

[0080] like Figure 9 , Figure 10 As shown, the tilting eccentric load force from the second sling 11 on the liftable boom 706 includes: a horizontal lateral load along the boom direction and a horizontal lateral load perpendicular to the boom direction.

[0081] Specifically, such as Figure 9As shown, when the telescopic boom is adjusted to its maximum length, and the length of the suspended object 8 is still greater than the boom length, both the first sling 10 and the second sling 11 will tilt outwards at both ends of the boom. Consequently, the second sling 11 will transmit a horizontal lateral load along the boom direction to the liftable boom 706. At this time, the horizontal lateral force is perpendicular to the axial direction of the roller 705. Through the pressing contact between the liftable boom 706 and the roller 705, the roller 705 bears the horizontal lateral force, thereby preventing the liftable boom 706 from shifting laterally. The liftable boom 706 remains vertical, thus ensuring that the lateral load is not transmitted to the lifting rod 702 of the elevator 701.

[0082] like Figure 10 As shown, when the lifting mechanism 7 drives the second sling 11 and the liftable lifting point 6 to move upward / downward, that is, when the lower end of the fixed lifting rod 15 and the lower end of the liftable lifting rod 706 are at different heights, the second sling 11 will tilt towards the first sling 10, and thus the second sling 11 has a tendency to pull the liftable lifting rod 706 towards the fixed lifting rod 15. The liftable lifting rod 706 is subjected to a horizontal lateral load from the second sling 11 perpendicular to the boom direction. At this time, the horizontal lateral force is perpendicular to the boom direction and parallel to the axis of the roller 705. The liftable lifting rod 706 presses against the side of the arc-shaped groove of the roller 705 to ensure that the liftable lifting rod 706 does not shift laterally. The liftable lifting rod 706 remains vertical, thus ensuring that the lateral load is not transmitted to the lifting rod 702 of the elevator 7.

[0083] Furthermore, two sets of rollers 705 are symmetrically arranged vertically on both sides of the liftable boom 706.

[0084] In implementation, this invention adjusts the length of the telescopic boom by extending and retracting it to accommodate the length of the suspended object 8. The lifting mechanism 7 displaces the second sling 11 relative to the first sling 10, causing the right-side liftable point 6 of the suspended object to shift relative to the left-side fixed point 5, thus achieving the rolling motion of the suspended object and enabling circumferential angle adjustment. The telescopic cylinder 3 provides the power for extending and retracting the first telescopic boom 1. Simultaneously, the telescopic cylinder 3 applies a reverse tension to the eccentric load generated on the end beam 4 and the fixed point 5, ensuring a locking force when the boom is fully extended. Rollers 705 provide lateral support to the liftable boom 706, allowing the rollers 705 and the liftable boom 706 to bear the lateral force from the second sling 11, thereby ensuring that the lifting rod 702 of the elevator 701 does not bear lateral force and protecting the lifting mechanism 7 from damage.

[0085] Example 2

[0086] In one specific embodiment of the present invention, an adjustable roll angle hoisting method is provided, which uses the adjustable roll angle eccentric bearing boom described in Embodiment 1 to hoist the object being hoisted.

[0087] The hoisting method in this embodiment includes:

[0088] Step S1: Adjust the length of the telescopic boom to match the length of the suspended object 8;

[0089] Step S2: Connect the first sling 10 between the fixed lifting point 5 of the suspended item 8 and the fixed lifting rod 15 of the end crossbeam 4; connect the second sling 11 between the liftable lifting point 6 of the suspended item 8 and the lifting mechanism 7;

[0090] Step S3: Lift the boom mounting base 9 to lift the object 8; during lifting, by driving the lifting rod 702 of the lifting mechanism 7 to extend or shorten, the second sling 11 is displaced relative to the first sling 10, thereby causing the object 8 to roll.

[0091] In step S1, when the length of the suspended object 8 is less than the maximum length of the boom, the first telescopic arm 1 and / or the second telescopic arm 2 are extended by the telescopic cylinder 3 and / or the electric push rod 12, and the overall length of the boom is adjusted to be consistent with the length of the suspended object 8, that is, the two end beams 4 are adjusted to be flush with the two end faces of the suspended object 8.

[0092] Specifically, in step S1, when the length of the suspended object 8 is greater than the maximum length of the boom, the first telescopic boom 1 and / or the second telescopic boom 2 are fully extended by the telescopic cylinder 3 and the electric push rod 12, so that the overall length of the boom is adjusted to the maximum length.

[0093] Specifically, in step S2, when the length of the suspended item 8 is equal to the adjusted boom length, that is, the fixed lifting point 5 and the fixed lifting rod 15 and the liftable lifting point 6 and the liftable lifting rod 706 are aligned vertically; at this time, the first lifting strap 10 and the second lifting strap 11 are in a vertical state.

[0094] Specifically, in step S2, when the length of the suspended item 8 is greater than the maximum length of the boom, that is, when the distance between the two end beams 4 is less than the distance between the lifting points at both ends of the suspended item 8, both the first lifting strap 10 and the second lifting strap 11 tilt outwards towards the ends of the boom. At this time, the bottom of the arc-shaped groove of the liftable boom 706 is pressed into contact with the bottom of the roller 705, limiting the offset of the liftable boom 706 and thus preventing the lateral load from being transmitted to the elevator 701.

[0095] Specifically, in step S3, the lifting mechanism 7 drives the suspended object 8 to roll in the following manner:

[0096] Step S301: The elevator 701 drives the lifting rod 702 to extend or retract, thereby enabling the liftable rod 706 to move down or up relative to the fixed rod 15.

[0097] Step S302: When the liftable boom 706 moves down, the liftable lifting point 6 moves down synchronously under the influence of the weight of the suspended object 8; when the liftable boom 706 moves up, the liftable lifting point 6 moves up under the pull of the second sling 11.

[0098] Step S303: When the liftable lifting point 6 moves vertically, the fixed lifting point 5 remains stationary, and the suspended item 8 rolls around the fixed lifting point 15; when the liftable lifting point 6 moves downward, the suspended item 8 rolls clockwise; when the liftable lifting point 6 moves upward, the suspended item 8 rolls counterclockwise; thus, the circumferential angle of the suspended item 8 is adjusted.

[0099] Furthermore, in step S3, when the suspended item 8 is deflected at an angle by the lifting mechanism 7, the second sling 11 tilts towards the first sling 10, thereby pulling the liftable boom 706 to press the side of the arc-shaped groove of the roller 705. The liftable boom 706 and the roller 705 are subjected to a horizontal lateral load perpendicular to the boom direction from the second sling 11. At this time, the side of the arc-shaped groove of the roller 705 supports the liftable boom 706, restricting the liftable boom 706 from lateral displacement. The liftable boom 706 remains vertical, thereby preventing the lateral load from being transmitted to the lifting rod 702 of the elevator 7.

[0100] Compared with the prior art, the technical solution provided in this embodiment has at least one of the following beneficial effects:

[0101] 1. In this invention, by designing an eccentric structure arrangement of the boom and end lifting beam, and by using a telescopic cylinder 3 arranged on the side, it is easy to achieve an asymmetrical arrangement of the telescopic boom. When the suspended item 8 is located at the center of the lifting device, there is a large space, which facilitates the placement of the suspended item 8 and the lifting device. Furthermore, by setting two sets of parallel telescopic booms, the length of the boom can be adjusted to the maximum extent, so that it can adapt to a wider range of suspended item 8 lengths.

[0102] 2. In this invention, when hoisting the object, if the support point of the bracket for placing the object 8 is not horizontal, or if the object 8 needs to be docked with other products, the circumferential roll angle of the object 8 needs to be adjusted to adapt to the height of the left and right lugs of the bracket or to adjust the angle of engagement with other products. This invention adopts a combination of fixed lifting points and adjustable lifting points to achieve the lateral roll function of the object. By precisely adjusting the height position of the end of the lifting mechanism 7, the height of the lifting lug on one side of the object can be adjusted to achieve precise adjustment of the circumferential roll angle, enabling fast, safe, and precise hoisting and placement / product docking.

[0103] 3. In this invention, the liftable boom 706 can withstand vertically downward loads and horizontal lateral offset loads. When the load is vertically downward, the elevator 701 can raise or lower the position of the lifting point. When the load deflects relative to the vertically downward load, the rollers 705 can support the liftable boom 706 to achieve vertical lifting and lowering of the lifting point, protecting the elevator 701 from damage caused by tilting loads.

[0104] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An adjustable roll angle eccentric load-bearing boom, characterized in that, include: Telescopic boom, end beam (4), fixed boom (15), lifting mechanism (7) and boom mounting base (9); The telescopic boom is provided in two sets, and is respectively installed on both sides of the boom mounting base (9); The end of the telescopic boom is fixedly installed with an end crossbeam (4); A fixed lifting rod (15) is fixedly installed on one side of the end beam (4), and a lifting mechanism (7) is installed on the other side; the fixed lifting rod (15) is connected to a fixed lifting point (5) on one side of the suspended item (8) through a first lifting strap (10), and the lifting mechanism (7) is connected to a liftable lifting point (6) on the other side of the suspended item (8) through a second lifting strap (11); when the lifting mechanism (7) extends or shortens, it can drive the suspended item (8) to roll.

2. The adjustable roll angle eccentric bearing boom according to claim 1, characterized in that, The telescopic boom and the end beam (4) are assembled in an eccentric T-shape.

3. The adjustable roll angle eccentric bearing boom according to claim 1 or 2, characterized in that, The telescopic boom includes: a first telescopic boom (1) and a second telescopic boom (2).

4. The adjustable roll angle eccentric bearing boom according to claim 3, characterized in that, The first telescopic arm (1) is nested in the boom mounting base (9) and can slide out relative to the boom mounting base (9).

5. The adjustable roll angle eccentric bearing boom according to claim 3, characterized in that, The second telescopic arm (2) is nested in the first telescopic arm (1) and can slide out relative to the first telescopic arm (1).

6. The adjustable roll angle eccentric bearing boom according to claim 3, characterized in that, A telescopic cylinder (3) is installed between the first telescopic arm (1) and the boom mounting base (9). The telescopic cylinder (3) is used to drive the first telescopic arm (1) to extend. The telescopic rod of the telescopic cylinder (3) is fixedly connected to the first telescopic arm (1).

7. The adjustable roll angle eccentric bearing boom according to claim 6, characterized in that, A linear push rod (12) is installed at the end of the telescopic cylinder (3), and the linear push rod (12) is used to drive the second telescopic arm (2) to extend out from the first telescopic arm (1).

8. The adjustable roll angle eccentric bearing boom according to claim 1, characterized in that, The two sets of telescopic booms are installed in the boom mounting base (9) in a staggered manner.

9. The adjustable roll angle eccentric bearing boom according to claim 7, characterized in that, The lead screw (14) of the linear push rod (12) can reciprocate; when the lead screw (14) extends, it can drive the second telescopic arm (2) to extend out from the first telescopic arm (1); when the lead screw (14) retracts, it can retract into the telescopic rod of the telescopic cylinder (3), and the telescopic rod is provided with an axially extending retraction hole (13).

10. A hoisting method with an adjustable roll angle, characterized in that, The adjustable roll angle eccentric load-bearing boom according to any one of claims 1-9 is used to lift the object; the lifting method includes: Step S1: Adjust the length of the telescopic boom to match the length of the suspended object (8); Step S2: Connect the first sling (10) between the fixed lifting point (5) of the suspended item (8) and the fixed lifting rod (15) of the end crossbeam (4); connect the second sling (11) between the lifting point (6) of the suspended item (8) and the lifting mechanism (7); Step S3: Lift the boom mounting base (9) to lift the object (8); during lifting, by driving the lifting rod (702) of the lifting mechanism (7) to extend or shorten, the second sling (11) is displaced relative to the first sling (10), thereby causing the object (8) to roll.

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