CN113734997A

CN113734997A - Correcting device for side bending of telescopic arm and crane

Info

Publication number: CN113734997A
Application number: CN202110939548.2A
Authority: CN
Inventors: 邹金伟; 杨尚峰; 阮晓峰
Original assignee: Sany Automobile Hoisting Machinery Co Ltd
Current assignee: Sany Automobile Hoisting Machinery Co Ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2021-12-03
Anticipated expiration: 2041-08-16
Also published as: CN113734997B

Abstract

The invention provides a device and a method for correcting the lateral bending of a telescopic boom, the telescopic boom and a crane, which are applied to the telescopic boom and comprise the following steps: a correction portion installed at a connection of adjacent first and second knuckle arms among the telescopic arms, the correction portion configured to correct a sidewise bending of the telescopic arms by changing a thickness in a radial direction of the first knuckle arms; wherein at least a portion of the first knuckle arm is disposed inside the second knuckle arm; a fixing portion between the correction portion and the telescopic arm, the fixing portion configured to fix the correction portion and the telescopic arm; and an adjusting portion connected with the correcting portion, the adjusting portion being configured to adjust a thickness of the correcting portion in a radial direction of the first knuckle arm according to a side bending state of the telescopic arm. The problem that can't rectify the flexible arm of side bend can be solved to this application.

Description

Correcting device for side bending of telescopic arm and crane

Technical Field

The invention relates to the technical field of cranes, in particular to a correction device for side bending of a telescopic boom and a crane.

Background

The crane is mostly used for outdoor operation, and outdoor operational environment is abominable and changeable, and the crane receives the damage easily in the face of the influence of natural factors such as different wind load, sunshine. When the crane lifts a heavy object, the steel wire rope wound on the pulley of the crane arm head and the center line of the crane arm have certain position deviation, so that the telescopic arm of the crane can bend to different degrees in the working process under the dual effects of the environment and the working state. The lateral bending of one section of the telescopic boom changes the stress state and stress point of the section of the boom and other sections of the boom, so that the local stress is increased, the telescopic boom is damaged, and the operation of the crane boom is unsafe. In the prior art, the side bending of the suspension arm is corrected by manually adjusting the slide block inside the suspension arm, so that the workload is high, repeated observation and adjustment are sometimes needed, and the time is consumed.

Disclosure of Invention

In view of this, embodiments of the present invention are directed to provide a device for correcting a lateral curve of a telescopic boom and a crane, which can solve the problem that the lateral curve of the boom needs to be corrected manually.

According to an aspect of the present invention, an embodiment of the present invention provides a device for correcting a lateral bending of a telescopic boom, applied to a telescopic boom, including: a correction portion installed at a connection of adjacent first and second knuckle arms among the telescopic arms, the correction portion configured to correct a sidewise bending of the telescopic arms by changing a thickness in a radial direction of the first knuckle arms; wherein at least a portion of the first knuckle arm is disposed inside the second knuckle arm; a fixing portion between the correction portion and the telescopic arm, the fixing portion configured to connect and fix the correction portion and the telescopic arm; and an adjusting portion connected with the correcting portion, the adjusting portion being configured to adjust a thickness of the correcting portion in a radial direction of the first knuckle arm according to a side bending state of the telescopic arm.

In one embodiment, the correction portion includes: the first correcting piece is connected with the fixing part, the first correcting piece is connected with the adjusting part, and the first correcting piece is installed on the first knuckle arm or the second knuckle arm; a second correcting member connected with the first correcting member; wherein the second correcting member is moved radially along the first pitch arm with respect to the first correcting member by the adjusting portion.

In one embodiment, the device for correcting the sidewise bending of the telescopic boom further comprises: the first limiting mechanism is positioned on the first correcting part; the second limiting mechanism is positioned on the second correcting piece; the first limiting mechanism and the second limiting mechanism are matched with each other, and the first limiting mechanism and the second limiting mechanism are configured to limit the displacement of the second correcting piece relative to the first correcting piece.

In one embodiment, a side of the first correcting element close to the second limiting mechanism comprises a storage cavity; wherein the first limiting mechanism is positioned in the storage cavity.

In one embodiment, the device for correcting the sidewise bending of the telescopic boom further comprises: the sealing ring is arranged on one side, close to the second correcting piece, of the first correcting piece; the sealing rib is arranged on one side, close to the first correcting piece, of the second correcting piece; wherein the sealing ring and the sealing rib are configured to cooperate with each other such that the storage chamber forms a sealed space.

In one embodiment, the adjusting portion includes: an inlet tube in communication with the storage chamber, the inlet tube configured to input a substance into the storage chamber to urge the second correcting member to move radially along the first pitch arm relative to the first correcting member to increase a thickness of the correcting portion; an output tube in communication with the storage chamber, the output tube configured to output the substance within the storage chamber to reduce the thickness of the correcting portion.

In one embodiment, the device for correcting the sidewise bending of the telescopic boom further comprises: a detection assembly mounted on the telescopic boom, the detection assembly configured to detect a lateral bending amount and a lateral bending direction of the telescopic boom; the control assembly is in communication connection with the detection assembly, is electrically connected with the adjusting part and is configured to control the input quantity of the input pipe and the output quantity of the output pipe according to the detection result of the detection assembly.

In one embodiment, the device for correcting the sidewise bending of the telescopic boom further comprises: the buffer block is arranged on the second correcting piece and located on one side, far away from the first correcting piece, of the second correcting piece.

In one embodiment, the first arm is sleeved with the second arm; one side of the correcting part is fixed on the inner surface of the second knuckle arm, and the other side of the correcting part is close to the outer surface of the first knuckle arm; and/or one side of the correcting part is fixed on the outer surface of the first knuckle arm, and the other side of the correcting part is close to the inner surface of the second knuckle arm.

According to another aspect of the present application, there is provided a crane comprising: the telescopic arm comprises a first section arm and a second section arm, wherein the first section arm is sleeved in the second section arm; and a device for correcting the lateral bending of the telescopic arm according to any one of the above embodiments; the device for correcting the lateral bending of the telescopic arm is positioned at the joint of the first knuckle arm and the second knuckle arm.

The application provides a correcting unit and hoist of flexible arm side bend, thereby change the side bend of correcting flexible arm through regulating part's thickness, the fixed part is used for fixing correcting part on flexible arm. The correction part is fixed through the fixing part, so that the correction part is convenient to replace and maintain. When the side bending is generated but the second knuckle arm does not generate local pressure on the first knuckle arm, the correcting part reduces the gap between the outer surface of the first knuckle arm and the inner surface of the second knuckle arm by changing the thickness, reduces the position where the second knuckle arm can generate the side bending, and therefore reduces the possibility of generating large-scale side bending. When the side bending is generated and the second knuckle arm already causes local pressure on the first knuckle arm, the correcting part is enabled to apply reaction force to the second knuckle arm at the position where the local stress of the second knuckle arm is increased through the adjustment of the adjusting part, so that the pressure generated by the side bending is offset, the possibility that the second knuckle arm is deformed due to the local increased pressure is reduced, and the possibility that the telescopic arm is dangerous due to the side bending is reduced.

Drawings

Fig. 1 is a perspective view illustrating an application scenario of a correction apparatus for a lateral bending of a telescopic boom according to an exemplary embodiment of the present application.

Fig. 2 is a side view of an application scenario of a device for correcting a lateral bending of a telescopic boom according to an exemplary embodiment of the present application.

Fig. 3 is a schematic structural diagram illustrating a device for correcting a lateral bending of a telescopic boom according to an exemplary embodiment of the present application.

Fig. 4 is a schematic structural diagram of a first correcting element according to an exemplary embodiment of the present application.

Fig. 5 is a schematic structural diagram of a second correcting element according to an exemplary embodiment of the present application.

Fig. 6 is a top view of a telescopic boom lateral bending correction apparatus according to an exemplary embodiment of the present application.

Fig. 7 is a left side view of a device for correcting a lateral bending of a telescopic boom according to an exemplary embodiment of the present application.

Fig. 8 is a schematic structural diagram illustrating a device for correcting a lateral bending of a telescopic boom, according to an exemplary embodiment of the present disclosure, in cooperation with the telescopic boom.

Fig. 9 is an exploded view of a correction part and a fixing part for side bending of a telescopic boom according to an exemplary embodiment of the present application.

Fig. 10 is a schematic view illustrating a thinnest configuration of a device for correcting lateral bending of a telescopic boom according to an exemplary embodiment of the present application.

Fig. 11 is a cross-sectional view taken along plane B-B of fig. 10.

Fig. 12 is a partial structural view of fig. 11 at C.

Fig. 13 is a schematic diagram illustrating a thickest form of a device for correcting a lateral bending of a telescopic boom according to an exemplary embodiment of the present application.

Figure 14 is a cross-sectional view taken along plane D-D of figure 13.

Fig. 15 is a partial structural view of fig. 14 at E.

Fig. 16 is a schematic flowchart illustrating a method for correcting a lateral bending of a telescopic boom according to an exemplary embodiment of the present application.

Fig. 17 is a schematic flowchart illustrating a method for correcting a lateral bending of a telescopic boom according to another exemplary embodiment of the present application.

Fig. 18 is a schematic diagram illustrating a method for correcting a lateral bending of a telescopic arm according to an exemplary embodiment of the present application.

Fig. 19 is a schematic structural diagram of a telescopic arm according to an exemplary embodiment of the present application.

Figure 20 is a cross-sectional view taken along plane a-a of figure 19.

Description of reference numerals: the correcting device comprises a correcting device 1, a second knuckle arm 2, a first knuckle arm 3, an adjusting part 12, an input pipe 121, an output pipe 122, a correcting part 13, a fixing part 14, an upper sliding block 15, a lower sliding block 16, a first correcting part 131, a second correcting part 132, a sealing rib 133, a first limiting mechanism 134, a sealing ring 135, a second limiting mechanism 136, a storage cavity 137 and a buffer block 138.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Further, in the exemplary embodiments, since the same reference numerals denote the same components having the same structure or the same steps of the same method, if an embodiment is exemplarily described, only a structure or a method different from the already described embodiment is described in other exemplary embodiments.

Throughout the specification and claims, when one element is described as being "connected" to another element, the one element may be "directly connected" to the other element or "electrically connected" to the other element through a third element. Furthermore, unless explicitly described to the contrary, the term "comprising" and its corresponding terms should only be taken as including the stated features, but should not be taken as excluding any other features.

Fig. 1 is a perspective view illustrating an application scenario of a correction apparatus for a telescopic boom lateral bending according to an exemplary embodiment of the present application, fig. 2 is a side view illustrating an application scenario of a correction apparatus for a telescopic boom lateral bending according to another exemplary embodiment of the present application, and fig. 3 is a schematic structural diagram illustrating a correction apparatus for a telescopic boom lateral bending according to an exemplary embodiment of the present application, as shown in fig. 1, 2 and 3, the correction apparatus 1 for a telescopic boom lateral bending is applied to a telescopic boom, and the correction apparatus 1 for a telescopic boom lateral bending includes: a correcting portion 13, a fixing portion 14, and an adjusting portion 12, the correcting portion 13 being installed at a junction of adjacent first and

second knuckle arms

3 and 2 in the telescopic arm, the correcting portion 13 being configured to correct a side curve of the telescopic arm by changing a thickness in a radial direction of the first knuckle arm 3; wherein at least part of the first knuckle arm 3 is arranged inside the second knuckle arm 2; the fixing portion 14 is located between the correcting portion 13 and the telescopic arm, and the fixing portion 14 is configured to connect and fix the correcting portion 13 and the telescopic arm; the adjusting portion 12 is connected to the correcting portion 13, and the adjusting portion 12 is configured to adjust the thickness of the correcting portion 13 in the radial direction of the first knuckle arm 3 in accordance with the side bending state of the telescopic arm.

As shown in fig. 1 and 2, the correcting portion 13 is installed at a joint of the adjacent first knuckle arm 3 and second knuckle arm 2 in the telescopic arm, typically at both left and right sides of the inner surface of the second knuckle arm 2, because the joint of the first knuckle arm 3 and second knuckle arm 2 is a point of force at which bending occurs. The first knuckle arm 3 and the second knuckle arm 2 are connected in a matching mode through an arm pin and an arm hole. When the telescopic boom is in a normal working state and no side bend is generated, stress on each section of the joint of the second knuckle boom 2 and the first knuckle boom 3 is uniform and within a safety range, and if the telescopic boom generates a certain degree of side bend in a working project, local stress on the second knuckle boom 2 is increased, so that the telescopic boom is damaged, and safety of hoisting operation is finally influenced.

The correcting part 13 corrects the lateral bending of the telescopic boom by changing the thickness thereof, and the principle is that at the position where the local stress of the second joint boom 2 is increased, the pressure generated by the lateral bending is offset by applying a reaction force, so that the possibility that the second joint boom 2 is deformed by the local increased pressure is reduced, and the possibility that the lateral bending of the telescopic boom is dangerous is reduced.

The fixing portion 14 is used for fixing the correcting portion 13 on the telescopic arm, a bolt fixing mode can be adopted between the fixing portion 14 and the telescopic arm, and the fixing portion 14 can be detached, so that the correcting portion 13 is convenient to replace and maintain. The adjusting portion 12 adjusts the thickness of the correcting portion 13 so that the correcting portion 13 generates a reaction force against the force generated by the lateral bending, thereby correcting the lateral bending of the first joint arm 3 with respect to the second joint arm 2.

The utility model provides a correcting unit 1 of telescopic boom side bend, thereby the side bend of telescopic boom is rectified through adjusting part 12 changes the thickness of correction portion 13, and fixed part 14 is used for fixing correction portion 13 on telescopic boom. The fixing part 14 fixes the correcting part 13, thereby facilitating the replacement and maintenance of the correcting part 13. When a side bend occurs but the second link arm 2 has not yet applied a local pressure to the first link arm 3, the correcting portion 13 reduces the gap between the outer surface of the first link arm 3 and the inner surface of the second link arm 2 by changing the thickness, and reduces the position where the second link arm 2 can make a side bend, thereby reducing the possibility of making a large side bend. When a side bend occurs and the second joint arm 2 already causes a local pressure to the first joint arm 3, the adjusting part 12 adjusts the correcting part 13 so that the correcting part 13 applies a reaction force to the second joint arm 2 at a position where the local stress of the second joint arm 2 is increased, thereby offsetting the pressure generated by the side bend, reducing the possibility that the second joint arm 2 is deformed due to the local stress, and reducing the possibility that the telescopic arm is in danger due to the side bend.

Fig. 4 is a schematic structural diagram of a first correction element provided in an exemplary embodiment of the present application, fig. 5 is a schematic structural diagram of a second correction element provided in an exemplary embodiment of the present application, and as shown in fig. 4 and 5, the correction portion 13 may include: a first correcting member 131 and a second correcting member 132, the first correcting member 131 being connected to the fixing portion 14, the first correcting member 131 being connected to the adjusting portion 12, the first correcting member 131 being mounted on the first knuckle arm 3 or the second knuckle arm 2; the second correcting member 132 is connected with the first correcting member 131; wherein the second correcting member 132 is moved radially along the first joint arm 3 with respect to the first correcting member 131 by the adjusting portion 12.

The correcting portion 13 may include a first correcting member 131 fixed to the first or

second joint arm

3 or 2, and a second correcting member 132 that can perform relative movement. When the distance between the second calibration member 132 and the first calibration member 131 is the shortest, the calibration part 13 is in the thinnest form, and when the distance between the second calibration member 132 and the first calibration member 131 reaches the farthest distance in the movable range, the calibration part 13 is in the thickest form. The thickness of the correcting part 13 can be adjusted by changing the distance between the second correcting part 132 and the first correcting part 131, so that the gap at the joint of the first knuckle arm 3 and the second knuckle arm 2 is adjusted, and the function of adjusting the side bending of the telescopic arm is achieved.

As shown in fig. 4 and 5, the correction device 1 for the side bending of the telescopic boom may further include: a first limiting mechanism 134 and a second limiting mechanism 136, wherein the first limiting mechanism 134 is positioned on the first correcting member 131; the second limiting mechanism 136 is positioned on the second correcting member 132; wherein the first and second limiting

mechanisms

134 and 136 are engaged with each other, and the first and second limiting

mechanisms

134 and 136 are configured to limit the displacement of the second correcting element 132 relative to the first correcting element 131.

The first limiting mechanism 134 and the second limiting mechanism 136 may be L-shaped buckles, the first limiting mechanism 134 and the second limiting mechanism 136 limit each other through short portions (transverse sections of the L-shaped buckles) of the L-shaped buckles, so as to limit the displacement amount of the second correcting member 132 relative to the first correcting member 131, when the short portions of the L-shaped buckles contact each other, the maximum displacement amount of the second correcting member 132 is reached, and at this time, the correcting portion 13 reaches the thickest form. The cooperation of the first limiting mechanism 134 and the second limiting mechanism 136 can also prevent the second correcting member 132 from falling off from the first correcting member 131, and ensure the stability of the connection of the first correcting member 131 and the second correcting member 132.

As shown in fig. 4 and 5, a side of the first correcting member 131 adjacent to the second stopper mechanism 136 may include a storage chamber 137; wherein the first stop mechanism 134 is located within the storage chamber 137.

The storage chamber 137 may be used to store hydraulic oil, the distance between the second correcting member 132 and the first correcting member 131 is controlled by controlling the amount of hydraulic oil in the storage chamber 137, and when there is no hydraulic oil in the storage chamber 137 or the amount of hydraulic oil does not exceed the capacity of the storage chamber 137, the distance between the second correcting member 132 and the first correcting member 131 is the closest, and the correcting portion 13 reaches the thinnest configuration. When the amount of the hydraulic oil in the storage chamber 137 exceeds the capacity of the storage chamber 137, the hydraulic oil pushes the second correcting member 132 to start moving relative to the first correcting member 131, and when the amount of the hydraulic oil reaches the maximum capacity of the cavity formed between the first correcting member 131 and the second correcting member 132, the correcting portion 13 reaches the thickest configuration.

The maximum capacity of the cavity formed between the first correcting part 131 and the second correcting part 132 is related to the length of the long part (vertical section of the L-shape) of the L-shaped buckle, the longer the length of the long part of the L-shaped buckle is, the greater the displacement distance that the second correcting part 132 can generate relative to the first correcting part 131 is, the greater the capacity of the cavity formed between the first correcting part 131 and the second correcting part 132 is, the maximum thickness that the correcting part 13 can reach is also related to the length of the long part of the L-shaped buckle, and the longer the length of the long part of the L-shaped buckle is, the greater the maximum thickness that the correcting part 13 can reach is.

The hydraulic oil may be replaced by other liquid, gas or solid as long as the substance can push the second correcting member 132 to displace relative to the first correcting member 131. Instead of hydraulically pushing the second correcting member 132, the second correcting member 132 may be electrically or pneumatically pushed.

As shown in fig. 4 and 5, the correction device 1 for the side bending of the telescopic boom may further include: the sealing ring 135 is arranged on one side of the first correcting part 131 close to the second correcting part 132, and the sealing rib 133 is arranged on one side of the second correcting part 132 close to the first correcting part 131; wherein the packing 135 and the packing rib 133 are configured to cooperate with each other to form a sealed space in the storage chamber 137.

The sealing ring 135 and the sealing rib 133 are matched to ensure that a cavity formed between the first correcting part 131 and the second correcting part 132 is a sealed space, so that hydraulic oil is prevented from leaking. The sum of the widths of the sealing ring 135 and the sealing rib 133 is equal to or greater than the lengths of the first limiting mechanism 134 and the second limiting mechanism 136, that is, the sum of the widths of the sealing ring 135 and the sealing rib 133 needs to be equal to or greater than the length of the long part of the L-shaped buckle, so that it is ensured that hydraulic oil cannot leak from the joint of the first correcting part 131 and the second correcting part 132 in the displacement process of the second correcting part 132.

The purpose that the second correcting member 132 is pushed by hydraulic oil can be achieved only by ensuring that a sealing space is formed between the first correcting member 131 and the second correcting member 132, and a reaction force can be formed by the oil pressure when the second correcting member 132 is extruded by the bent joint arm.

Fig. 6 is a top view of a device for correcting a lateral bending of a telescopic boom according to an exemplary embodiment of the present application, and as shown in fig. 6, the adjusting part 12 may include: an inlet pipe 121 and an outlet pipe 122, the inlet pipe 121 communicating with the storage chamber 137, the inlet pipe 121 configured to input a substance into the storage chamber 137 to push the second correcting member 132 to move radially along the first pitch arm 3 with respect to the first correcting member 131 to increase the thickness of the correcting portion 13; the output tube 122 communicates with the storage chamber 137, and the output tube 122 is configured to output the substance in the storage chamber 137 to reduce the thickness of the correcting section 13.

The inlet pipe 121 and the outlet pipe 122 can be used to supply and discharge hydraulic oil into the storage chamber 137. When hydraulic oil is supplied into the storage chamber 137, the hydraulic oil is supplied from the supply pipe 121, the discharge pipe 122 is closed, and the hydraulic oil is prevented from leaking out of the discharge pipe 122, and at this time, the second correcting member 132 is radially moved relative to the first correcting member 131 in a direction away from the first link arm 3, and the thickness of the correcting portion 13 is increased. When the hydraulic oil is discharged from the storage chamber 137, the hydraulic oil is discharged from the discharge pipe 122 to close the orifice of the discharge pipe 121, and at this time, the second correcting member 132 is radially moved relative to the first correcting member 131 in a direction approaching the first joint arm 3, and the thickness of the correcting portion 13 is reduced.

A hydraulic oil pressure monitoring device is arranged in the storage cavity 137, whether the correcting part 13 reaches the thickest value is judged by detecting the oil pressure in the storage cavity 137, when the correcting part 13 reaches the thickest position, the oil pressure is detected to exceed the preset maximum oil pressure, at the moment, the injection of the hydraulic oil is stopped, and the hydraulic oil volume of the cavity formed between the first correcting part 131 and the second correcting part 132 reaches saturation. Check valves and pressure relief valves can be arranged on the input pipe 121 and the output pipe 122 to ensure the safety and no leakage of the oil path.

In an embodiment, the device 1 for correcting the side bending of the telescopic boom may further comprise: the detection assembly is arranged on the telescopic arm and is configured to detect the lateral bending amount and the lateral bending direction of the telescopic arm; and the control component is in communication connection with the detection component, is electrically connected with the adjusting part 12, and is configured to control the input quantity of the input pipe 121 and the output quantity of the output pipe 122 according to the detection result of the detection component.

The detection assembly is used for detecting the lateral bending amount and the lateral bending direction of the telescopic arm. The detection assembly can comprise two transmitters and a receiver, the two transmitters are respectively arranged on two sides of the telescopic arm, and the distance from the two transmitters to the receiver and the distance between the two transmitters are measured. And detecting actual distances between the two transmitters and the receiver respectively during working, comparing the actual distances with the measured distances, and calculating to obtain the lateral bending amount of the telescopic boom. The measured and actual distances can also be used to analyze the direction of the side bending of the telescopic boom.

And the control assembly receives the detection result of the detection assembly and determines the side bending amount and the side bending direction of the telescopic arm, wherein the side bending direction of the telescopic arm is obtained by analyzing the side bending direction information detected by the detection assembly by the control assembly. The adjusting part 12 is controlled to increase or decrease the hydraulic oil according to the amount of the lateral bending and the direction of the lateral bending, thereby controlling the displacement of the second correcting member 132 and achieving the effect of adjusting the thickness of the correcting part 13. For example, two correction portions 13, a fixing portion 14, and an adjustment portion 12 are provided on each of the left and right sides of the joint of the first joint arm 3 and the second joint arm 2. When the first link arm 3 is laterally bent to the left with respect to the second link arm 2, the control unit controls the adjusting portion 12 to inject hydraulic oil into the left correcting portion 13, and at the same time, reduces the hydraulic oil in the right correcting portion 13, so that the first link arm 3 is subjected to a force that the correcting portion 13 pushes to the right, thereby correcting to the right, and when the first link arm 3 is laterally bent to the right with respect to the second link arm 2, the control unit controls the adjusting portion 12 to inject hydraulic oil into the right correcting portion 13, and at the same time, reduces the hydraulic oil in the left correcting portion 13, so that the first link arm 3 is subjected to a force that the correcting portion 13 pushes to the left, thereby correcting to the left.

The amount of the hydraulic oil injected and reduced is related to the amount of the side bending, and the control assembly can control the amount of the hydraulic oil to be increased or reduced according to the amount of the side bending, so that the effect of accurate correction is achieved. The change of the hydraulic oil is automatically controlled through the lateral bending amount and the lateral bending direction, a manual adjustment mode is replaced, real-time adjustment can be achieved, adjustment is more accurate, and adjustment time is saved.

When the thickness of the control correcting part 13 is changed, the same side is preferentially executed to simultaneously increase or decrease the hydraulic oil, so that the stress of the side-bent knuckle arm is more uniform, and the damage to the side-bent knuckle arm is reduced. Furthermore, the same side of the mouth part position and the tail part position of the lateral bending knuckle arm is preferentially executed to simultaneously increase or reduce hydraulic oil, so that the reaction force borne by the lateral bending knuckle arm can be more uniform in the correction process, the possibility of single-point concentrated stress is reduced, and the loss of the knuckle arm is reduced.

Fig. 7 is a left side view of a telescopic boom side bending correction apparatus according to an exemplary embodiment of the present application, and as shown in fig. 7, the telescopic boom side bending correction apparatus 1 may further include: the buffer block 138, the buffer block 138 is disposed on the second calibration member 132, and the buffer block 138 is located on a side of the second calibration member 132 away from the first calibration member 131.

The buffer block 138 and the second correcting member 132 can be connected by glue, bolts, or die-casting, etc. to fix the buffer block 138 and the second connecting member, and the buffer block 138 displaces together with the second correcting member 132. The buffer block 138 can be made of nylon and has high wear resistance.

In one embodiment, the first arm 3 is sleeved with the second arm 2; wherein, one side of the correcting part 13 is fixed on the inner surface of the second knuckle arm 2, and the other side of the correcting part 13 is close to the outer surface of the first knuckle arm 3; and/or one side of the correcting part 13 is fixed on the outer surface of the first knuckle arm 3, and the other side of the correcting part 13 is close to the inner surface of the second knuckle arm 2.

The first knuckle arm 3 is sleeved in the second knuckle arm 2, and at least one part of the first knuckle arm 3 is positioned in the second knuckle arm 2. The first correcting element 131 of the correcting portion 13 may be mounted on the inner surface of the second joint arm 2 via the fixing portion 14, and the second correcting element 132 may be radially displaced toward the outer surface of the first joint arm 3, and may provide the first joint arm 3 with a reaction force against a side bending force when the second correcting element 132 is radially displaced toward the outer surface of the first joint arm 3. The first corrector 131 of the corrector 13 may be attached to the outer surface of the first joint arm 3 via the fixing portion 14, and the second corrector 132 may be radially displaced toward the inner surface of the second joint arm 2. Therefore, when the telescopic arm has a plurality of knuckle arms, the front end and the rear end of each knuckle arm can be provided with the correction part 13, when the knuckle arms are sleeved outside other knuckle arms, the correction part 13 is arranged on the inner surface of the current knuckle arm, and when the knuckle arms are sleeved inside other knuckle arms, the correction part 13 is arranged on the outer surface of the current knuckle arm, so that the effect of multipoint simultaneous correction is achieved, the correction efficiency is improved, the stress area of the bent knuckle arm is increased, and the loss caused by the correction of the bent side is reduced.

The device 1 for correcting the lateral bending of the telescopic boom may include a first correcting portion, a first fixing portion, a first adjusting portion, a second correcting portion, a second fixing portion, and a second adjusting portion; the first correcting part is connected with the first adjusting part, the first fixing part is positioned between the first correcting part and the telescopic arm, the first correcting part, the first fixing part and the first adjusting part are arranged on the left side of the inner surface of the second knuckle arm 2 or the left side of the outer surface of the first knuckle arm 3, and the first adjusting part is used for controlling the thickness of the first correcting part to be increased when the telescopic arm bends leftwards; the second correcting portion is connected to a second adjusting portion, the second fixing portion is located between the second correcting portion and the telescopic arm, the second correcting portion, the second fixing portion and the second adjusting portion are installed on the right side of the inner surface of the second knuckle arm 2 or the right side of the outer surface of the first knuckle arm 3, and the second adjusting portion is configured to control the thickness of the second correcting portion to increase when the telescopic arm makes a right side lateral bend.

One or more correcting devices 1 are arranged on the left side and the right side of the joint of the first section arm 3 and the second section arm 2, and can correct left lateral bending or right lateral bending of the telescopic arm. Wherein, one side sets up a plurality of correcting unit 1 simultaneously for better scheme, and a plurality of correcting unit 1 play the effect of multiple spot simultaneous correction, improve the efficiency of correction and increase the lifting surface area of the knuckle arm of side bend, reduce the loss that causes because of correcting the side bend.

Fig. 8 is a schematic structural view illustrating a device for correcting a lateral bending of a telescopic boom according to an exemplary embodiment of the present invention, which is coupled to the telescopic boom, and as shown in fig. 8, in addition to the devices 1 mounted on both sides of the telescopic boom, an upper slider 15 and a lower slider 16 may be mounted on an inner surface of the second link arm 2, so as to reduce a gap between an upper portion and a lower portion of a joint between the first link arm 3 and the second link arm 2, reduce a possibility of the first link arm 3 bending upward or downward, and play a role of buffering when bending upward or downward.

Fig. 9 is an exploded view of a correction part and a fixing part for side bending of a telescopic boom according to an exemplary embodiment of the present invention, as shown in fig. 9, the first correction member 131 may be in a convex shape, the fixing part 14 may be a fixed frame, the fixing part 14 fixes the first correction member 131 on the telescopic boom by shape matching with the first correction member 131, the fixing part 14 is a frame structure, the position where the fixing part 14 matches with the first correction member 131 is located between the first correction member 131 and the second correction member 132, the movement of the second correction member 132 is not affected while fixing the first correction member 131, and the buffer block 138 is located on a side of the second correction member 132 away from the first correction member 131.

When the correction device 1 for the side bending of the telescopic boom is applied to the telescopic boom in actual use, the correction device 1 may be installed on both sides of the telescopic boom, and the number of the correction devices 1 may be selected according to the inner diameter of the telescopic boom. A detection device is arranged on the telescopic arm and used for detecting the side bending amount and the side bending direction of the telescopic arm, and the control device arranged on the telescopic arm controls the injection and the output of the hydraulic oil. The amount of the sweep is related to the amount of oil injected and the direction of the sweep is related to the injection of hydraulic oil into the calibrating device 1 which selects different sides.

For example, when the first link arm 3 is laterally bent to the left with respect to the second link arm 2, the control unit controls the adjustment unit 12 to inject the hydraulic oil into the correction unit 13 on the left side, and at the same time, reduces the hydraulic oil in the correction unit 13 on the right side, so that the first link arm 3 is subjected to the force that the correction unit 13 pushes to the right, thereby performing the correction to the right, and when the first link arm 3 is laterally bent to the right with respect to the second link arm 2, the control unit controls the adjustment unit 12 to inject the hydraulic oil into the correction unit 13 on the right side, and at the same time, reduces the hydraulic oil in the correction unit 13 on the left side, so that the first link arm 3 is subjected to the force that the correction unit 13 pushes to the left, thereby performing the correction to the left. Wherein the amount of the hydraulic oil to be injected and the amount of the hydraulic oil to be reduced are determined according to the amount of the lateral bending.

The correction device 1 has two extreme forms in actual use, including a thinnest form and a thickest form, with the remaining forms varying between the thinnest form and the thickest form. Fig. 10 is a schematic view of the thinnest configuration of a correction device 1 for side bending of a telescopic boom according to an exemplary embodiment of the present invention, fig. 11 is a cross-sectional view taken along the plane B-B in fig. 10, and fig. 12 is a schematic view of a partial structure at the position C in fig. 11, as shown in fig. 10, 11 and 12, when the correction device 1 is in the thinnest configuration, the first correction member 131 completely abuts against the second correction member 132, the storage chamber 137 forms a sealed space through the cooperation of the sealing rib 133 and the sealing ring 135, and the capacity of the storage chamber 137 in the thinnest configuration is just equal to the capacity of the storage chamber 137. When the hydraulic oil is injected in an amount larger than the capacity of the storage chamber 137, the second correcting member 132 starts to be displaced.

In an embodiment, the telescopic arm may comprise: the telescopic boom is characterized by comprising a plurality of booms, wherein every two adjacent booms are mutually sleeved, the left side and the right side of the joint of every two adjacent booms are respectively provided with at least one correcting part 13, at least one fixing part 14 and at least one adjusting part 12, and the correcting method of the at least one correcting part 13, the at least one fixing part 14 and the at least one adjusting part 12 can adopt the correcting method of the side bending of the telescopic boom in any embodiment.

And a detection component and a control component are arranged on the knuckle arm at one end of the telescopic arm far away from the crane, the control component is preset, the lateral bending amount of all the knuckle arms is accumulated on the knuckle arm at one end far away from the crane, and the lateral bending amount of other knuckle arms can be calculated through the lateral bending amount detected by the knuckle arm. The preset content may include range division of the amount of lateral bending, and setting of an adjustment range of the adjustment unit 12, where the adjustment range of the adjustment unit 12 corresponds to the range of the amount of lateral bending one by one. The adjustment ranges of the adjustment portions 12 corresponding to different knuckle arms in the same side bending amount range are different, for example, the side bending amount generated by the knuckle arm at the end far away from the crane is greater than that of other knuckle arms, and therefore, the thicknesses of the knuckle arm at the end far away from the crane and the correction portion 13 mounted at the knuckle arm adjacent to the knuckle arm should be greater than those of other correction portions 13. When the amount of lateral bending falls within one of the ranges of the amount of lateral bending, the adjustment range of the adjustment portion 12 corresponding thereto is adjusted, and the thicknesses of the correction portions 13 different in each knuckle arm are adjusted directly and separately. When the telescopic boom bends sideways, the plurality of knuckle booms can be quickly adjusted according to preset contents, and the possibility of serious side bending of the telescopic boom is reduced. After the quick adjustment, the fine adjustment of the plurality of sections of the telescopic arm can be continuously carried out according to the detection feedback of the detection assembly. The scheme for installing the detection assembly is that the correction parts 13 of different sections of arms are directly adjusted according to the integral side bending amount of the telescopic arm, so that the cost for installing a plurality of detection assemblies is saved.

The detection components can be arranged on a plurality of sections of the telescopic arm, and the left side and the right side of the joint of every two adjacent sections of the telescopic arm are respectively provided with at least one correction part 13, at least one fixing part 14 and at least one adjusting part 12. Each detection unit individually detects the amount of lateral bending of each joint arm, and the joint arm is corrected by one or more correction units 13 corresponding to the joint arm with reference to the amount of lateral bending of the joint arm, the correction of each joint arm being independent of each other. The method for installing the plurality of detection assemblies is to independently adjust each knuckle arm according to the side bending amount generated by each knuckle arm, so that a more accurate correction effect can be achieved.

Fig. 13 is a schematic diagram illustrating a thickest form of a correction apparatus 1 for telescopic arm side bending according to an exemplary embodiment of the present invention, fig. 14 is a cross-sectional view taken along D-D of fig. 13, and fig. 15 is a partial structural diagram of fig. 14 at E, as shown in fig. 13, 14 and 15, when the correction apparatus 1 is in the thickest form, a distance between the first correction member 131 and the second correction member 132 is maximized, and a storage chamber 137 forms a sealed space by the engagement of the sealing rib 133 and the sealing ring 135. In the thickest state, the volume of the cavity formed between the first correcting element 131 and the second correcting element 132 is larger than the volume of the storage chamber 137, the volume of the cavity is related to the limit lengths of the first limit mechanism 134 and the second limit mechanism 136, and the longer the distance the second correcting element 132 can be displaced, the larger the volume of the cavity formed between the first correcting element 131 and the second correcting element 132. During the displacement of the second correcting member 132, the sealing ribs 133 and the sealing rings 135 are matched to ensure that the cavity formed between the first correcting member 131 and the second correcting member 132 always forms a sealing space. The buffer block 138 moves with the movement of the second correction member 132.

Fig. 16 is a schematic flow chart illustrating a method for correcting a lateral bending of a telescopic boom according to an exemplary embodiment of the present disclosure, where, as shown in fig. 16, the method for correcting a lateral bending of a telescopic boom is applied to a telescopic boom, the telescopic boom includes a correcting device, where the correcting device includes a correcting portion, the correcting portion is installed at a connection between adjacent first and second link arms in the telescopic boom, and the correcting portion is configured to correct a lateral bending of the telescopic boom by changing a thickness of the telescopic boom in a radial direction of the first link arm; wherein at least part of the first knuckle arm is arranged inside the second knuckle arm; a fixing portion located between the correction portion and the telescopic arm, the fixing portion configured to fix the correction portion and the telescopic arm; and an adjusting portion connected to the correcting portion, the adjusting portion being configured to adjust a thickness of the correcting portion in a radial direction of the first knuckle arm in accordance with a state of the side curve of the telescopic arm, the method of correcting the side curve of the telescopic arm including:

step 110: and detecting the side bending direction and the side bending amount of the first knuckle arm.

The side bending state of the telescopic arm can be detected by installing two transmitters and a receiving tower, the two transmitters are installed on two sides of the telescopic arm, and the distance from the two transmitters to the receiving tower and the distance between the two transmitters are measured. And during working, detecting actual distances between the two transmitters and the receiving tower respectively, comparing the actual distances with the measured distances, calculating to obtain the side bending amount of the telescopic arm, and determining the side bending direction according to the distances so as to obtain the side bending amount and the side bending direction of the telescopic arm.

Step 120: the thickness of the correcting part is adjusted according to the lateral bending direction and the lateral bending amount.

The control assembly receives the detection result of the detection assembly, and after the lateral bending amount and the lateral bending direction of the telescopic arm are determined, the control assembly controls the adjusting part to increase or decrease hydraulic oil through the lateral bending amount and the lateral bending direction, so that the displacement of the second correcting part is controlled, and the effect of adjusting the thickness of the correcting part is achieved. For example, two correction portions, a fixing portion, and an adjustment portion are provided on each of the left and right sides of the joint of the first and second joint arms. When the first knuckle arm bends towards the right side relative to the second knuckle arm, the control assembly controls the adjusting portion to inject hydraulic oil into the correcting portion on the left side, meanwhile, the hydraulic oil in the correcting portion on the right side is reduced, the first knuckle arm is enabled to be subjected to the force of the correcting portion pushing towards the right side, and therefore correction towards the right side is achieved.

Fig. 17 is a schematic flowchart illustrating a method for correcting a lateral bending of a telescopic boom according to another exemplary embodiment of the present application, where as shown in fig. 17, the method for correcting a lateral bending of a telescopic boom is applied to a telescopic boom, the telescopic boom includes a correcting device, and the correcting device includes a first correcting portion, a first fixing portion, a first adjusting portion, a second correcting portion, a second fixing portion, and a second adjusting portion; the first correcting part is connected with the first adjusting part, the first fixing part is positioned between the first correcting part and the telescopic arm, the second correcting part is connected with the second adjusting part, and the second fixing part is positioned between the second correcting part and the telescopic arm; the first correcting part, the first fixing part and the first adjusting part are arranged on the left side of the inner surface of the second knuckle arm or the left side of the outer surface of the first knuckle arm, and the second correcting part, the second fixing part and the second adjusting part are arranged on the right side of the inner surface of the second knuckle arm or the right side of the outer surface of the first knuckle arm; wherein, the step 120 may include:

step 121: when the lateral bending direction is left, the first adjusting part controls the thickness of the first correcting part to increase according to the lateral bending amount.

Step 122: the first adjusting portion controls the thickness of the second correcting portion to be reduced according to the amount of the lateral bending.

Step 123: when the lateral bending direction is right, the second adjusting portion controls the thickness of the second correcting portion to increase according to the lateral bending amount.

Step 124: the second adjusting portion controls the thickness of the first correcting portion to be decreased according to the amount of the lateral bending.

When the first arm bends leftwards relative to the second arm, step 121 and step 122 may be executed simultaneously, or only step 121 or step 122 may be executed; when the first level makes a side turn to the right with respect to the second link arm, step 123 and step 124 may be performed simultaneously, or only step 123 or step 124 may be performed.

When the first knuckle arm bends towards the left side relative to the second knuckle arm, the control assembly controls the adjusting portion to inject hydraulic oil into the correcting portion on the left side, meanwhile, the hydraulic oil in the correcting portion on the right side can be selectively reduced, the gap between the first knuckle arm and the left side of the second knuckle arm is reduced, and the first knuckle arm is subjected to the force of the correcting portion pushing towards the right side, so that the first knuckle arm is corrected towards the right side. When the first knuckle arm bends towards the right side relative to the second knuckle arm, the control assembly controls the adjusting portion to inject hydraulic oil into the correcting portion on the right side, so that the gap between the first knuckle arm and the right side of the second knuckle arm is reduced, and meanwhile, the hydraulic oil in the correcting portion on the left side is selectively reduced, so that the first knuckle arm is subjected to the force of the correcting portion pushing towards the left side, and therefore the first knuckle arm is corrected towards the left side.

Fig. 18 is a schematic diagram illustrating a method for correcting a bending of a telescopic arm according to an exemplary embodiment of the present disclosure, and as shown in fig. 16, when the correction of the bending of the telescopic arm is started, the control module receives a bending amount and bending direction information (step 50), where the bending amount and the bending direction information are detected by the detection module. The control unit determines whether the left lateral curve is a right lateral curve or a left lateral curve based on the lateral curve amount and the lateral curve direction information detected by the detection unit (step 51). When it is determined that the telescopic boom is left-handed bent, hydraulic oil is injected into the correcting portion on the left side of the telescopic boom while hydraulic oil in the correcting portion on the right side is reduced (step 52), and the left-handed bent of the telescopic boom is corrected. When it is determined that the telescopic boom is in the right lateral curve, hydraulic oil is injected into the correcting portion on the right side of the telescopic boom while hydraulic oil in the correcting portion on the left side is reduced (step 53), and the right lateral curve of the telescopic boom is corrected. After the correction in step 52 or step 53, it is monitored again whether the amount of lateral bending satisfies a predetermined requirement (step 54), where the predetermined requirement is a safety range of the amount of lateral bending preset by the user, and the lateral bending within a certain range can be regarded as a safe state, and the correction is finished without performing the correction again. When the side bending amount exceeds a preset safety range, namely when the preset requirement is not met, judging whether the telescopic arm is in left side bending or right side bending again, and continuing to correct.

Fig. 19 is a schematic structural view illustrating a telescopic arm according to an exemplary embodiment of the present application, and fig. 20 is a sectional view taken along a-a of fig. 19, wherein the telescopic arm includes: the device comprises a first knuckle arm 3 and a second knuckle arm 2, wherein the first knuckle arm 3 is sleeved in the second knuckle arm 2; and a device 1 for correcting the sidewise bending of a telescopic arm according to any one of the preceding claims; wherein, the correcting device for the side bending of the telescopic boom is positioned at the joint of the first knuckle boom 3 and the second knuckle boom 2.

In an embodiment, the telescopic arm may comprise: the telescopic boom is characterized by comprising a plurality of articulated arms, wherein every two adjacent articulated arms are mutually sleeved, at least one correcting device can be arranged on the left side and the right side of the joint of every two adjacent articulated arms, each correcting device can adopt the correcting device for the lateral bending of the telescopic boom in any embodiment, and the correcting method of each correcting device can adopt the correcting method for the lateral bending of the telescopic boom in any embodiment.

The application provides a correcting unit of telescopic boom includes: the correcting portion 13, and the upper slider 15 and the lower slider 16, correct the lateral bending of the telescopic arm by changing the thickness of the correcting portion 13 by the adjusting portion 12, and the fixing portion 14 is used to fix the correcting portion 13 to the telescopic arm. The fixing part 14 fixes the correcting part 13, thereby facilitating the replacement and maintenance of the correcting part 13. When a side bend occurs but the second link arm 2 has not yet applied a local pressure to the first link arm 3, the correcting portion 13 reduces the gap between the outer surface of the first link arm 3 and the inner surface of the second link arm 2 by changing the thickness, and reduces the position where the second link arm 2 can make a side bend, thereby reducing the possibility of making a large side bend. When a side bend occurs and the second joint arm 2 already causes a local pressure to the first joint arm 3, the adjusting part 12 adjusts the correcting part 13 so that the correcting part 13 applies a reaction force to the second joint arm 2 at a position where the local stress of the second joint arm 2 is increased, thereby offsetting the pressure generated by the side bend, reducing the possibility that the second joint arm 2 is deformed due to the local stress, and reducing the possibility that the telescopic arm is in danger due to the side bend. The upper slider 15 and the lower slider 16 are used to reduce the gap between the upper part and the lower part of the joint between the first knuckle arm 3 and the second knuckle arm 2, reduce the possibility of the first knuckle arm 3 bending upwards or downwards, and play a role of buffering when bending upwards or downwards.

The present application further provides a crane, comprising: a telescopic arm and a device for correcting the lateral bending of the telescopic arm according to any one of the embodiments; the telescopic arm comprises a first section arm and a second section arm, and the first section arm is sleeved in the second section arm; the correcting device for the side bending of the telescopic arm is positioned at the joint of the first knuckle arm and the second knuckle arm.

The application provides a hoist, through installing above-mentioned any one embodiment the correcting unit of flexible arm side bend carry out the side bend volume of flexible arm and the detection of side bend direction to according to side bend volume and side bend direction to the flexible arm of side bend is rectified.

The crane provided by the present application may further comprise: the telescopic boom is characterized by comprising a plurality of articulated arms, wherein every two adjacent articulated arms are mutually sleeved, at least one correcting device can be arranged on the left side and the right side of the joint of every two adjacent articulated arms, each correcting device can adopt the correcting device for the lateral bending of the telescopic boom in any embodiment, and the correcting method of each correcting device can adopt the correcting method for the lateral bending of the telescopic boom in any embodiment.

The application provides a hoist, the left side and the right side at the first festival arm of hoist telescopic boom and second festival arm junction respectively are equipped with the correcting unit of two telescopic boom side bendings, and correcting unit includes correction portion, fixed part and regulating part. When the first knuckle arm bends towards the right side relative to the second knuckle arm, the control assembly controls the adjusting portion to inject hydraulic oil into the correcting portion on the left side, meanwhile, the hydraulic oil in the correcting portion on the right side is reduced, the first knuckle arm is enabled to be subjected to the force of the correcting portion pushing towards the right side, and therefore correction towards the right side is achieved. Wherein the injection amount or the reduction amount of the hydraulic oil is related to the side bending amount of the telescopic arm.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.

Claims

1. The utility model provides a correcting unit of flexible arm side bend, is applied to on the flexible arm, its characterized in that includes:

a correction portion installed at a connection of adjacent first and second knuckle arms among the telescopic arms, the correction portion configured to correct a sidewise bending of the telescopic arms by changing a thickness in a radial direction of the first knuckle arms; wherein at least a portion of the first knuckle arm is disposed inside the second knuckle arm;

a fixing portion between the correction portion and the telescopic arm, the fixing portion configured to connect and fix the correction portion and the telescopic arm; and

an adjusting portion connected with the correcting portion, the adjusting portion configured to adjust a thickness of the correcting portion in a radial direction of the first knuckle arm according to a side bending state of the telescopic arm.

2. The apparatus for correcting a lateral curve of a telescopic arm according to claim 1, wherein said correcting portion comprises:

the first correcting piece is connected with the fixing part, the first correcting piece is connected with the adjusting part, and the first correcting piece is installed on the first knuckle arm or the second knuckle arm;

a second correcting member connected with the first correcting member;

wherein the second correcting member is moved radially along the first pitch arm with respect to the first correcting member by the adjusting portion.

3. The apparatus for correcting a sidewise bending of a telescopic arm according to claim 2, further comprising:

the first limiting mechanism is positioned on the first correcting part;

the second limiting mechanism is positioned on the second correcting piece;

the first limiting mechanism and the second limiting mechanism are matched with each other, and the first limiting mechanism and the second limiting mechanism are configured to limit the displacement of the second correcting piece relative to the first correcting piece.

4. The apparatus according to claim 3, wherein the first correcting member includes a storage chamber on a side thereof adjacent to the second stopper mechanism; wherein the first limiting mechanism is positioned in the storage cavity.

5. The apparatus for correcting a sidewise bending of a telescopic arm according to claim 4, further comprising:

the sealing ring is arranged on one side, close to the second correcting piece, of the first correcting piece;

the sealing rib is arranged on one side, close to the first correcting piece, of the second correcting piece;

wherein the sealing ring and the sealing rib are configured to cooperate with each other such that the storage chamber forms a sealed space.

6. The apparatus for correcting a sidewise bending of a telescopic arm according to claim 4, wherein said adjusting portion comprises:

an inlet tube in communication with the storage chamber, the inlet tube configured to input a substance into the storage chamber to urge the second correcting member to move radially along the first pitch arm relative to the first correcting member to increase a thickness of the correcting portion;

an output tube in communication with the storage chamber, the output tube configured to output the substance within the storage chamber to reduce the thickness of the correcting portion.

7. The apparatus for correcting a sidewise bending of a telescopic arm according to claim 6, further comprising:

a detection assembly mounted on the telescopic boom, the detection assembly configured to detect a lateral bending amount and a lateral bending direction of the telescopic boom;

the control assembly is in communication connection with the detection assembly, is electrically connected with the adjusting part and is configured to control the input quantity of the input pipe and the output quantity of the output pipe according to the detection result of the detection assembly.

8. The apparatus for correcting a sidewise bending of a telescopic arm according to claim 2, further comprising: the buffer block is arranged on the second correcting piece and located on one side, far away from the first correcting piece, of the second correcting piece.

9. The apparatus as claimed in claim 1, wherein the first arm is coupled to the second arm;

one side of the correcting part is fixed on the inner surface of the second knuckle arm, and the other side of the correcting part is close to the outer surface of the first knuckle arm; and/or

One side of the correcting part is fixed on the outer surface of the first knuckle arm, and the other side of the correcting part is close to the inner surface of the second knuckle arm.

10. A crane, comprising:

the telescopic arm comprises a first section arm and a second section arm, wherein the first section arm is sleeved in the second section arm; and

a device for correcting a lateral curve of a telescopic arm according to any one of claims 1 to 9; the device for correcting the lateral bending of the telescopic arm is positioned at the joint of the first knuckle arm and the second knuckle arm.