Tow chain protection device, boom device and engineering machine

Abstract

This invention relates to the field of construction machinery and discloses a cable chain protection device, a boom assembly, and construction machinery. The device includes: a correction mechanism installed on the cable chain for driving the cable chain away from or towards the boom assembly along the boom width direction; a rangefinder for detecting the current gap between the cable chain and the boom assembly along the boom width direction; and a controller electrically connected to the correction mechanism and the rangefinder, configured to: acquire the current gap; and, based on the current gap and a preset gap range, control the correction mechanism to drive the cable chain away from or towards the boom assembly along the boom width direction until the current gap is within the preset gap range. The cable chain protection device of this invention, through the cooperation of the correction mechanism, the rangefinder, and the controller, can correct the cable chain based on the current gap between the cable chain and the boom assembly, avoiding the risk of collision due to the cable chain tilting inward or outward, and greatly improving the safety of the boom assembly and the cable chain.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, specifically relating to a cable chain protection device, boom equipment, and engineering machinery. Background Technology

[0002] In existing construction machinery with boom equipment, such as boom-type aerial work platforms, the cable chain is usually installed on the side of the boom assembly, and the cable chain basically adopts a cantilever installation structure.

[0003] Under swaying and impact conditions, such as personnel walking on the aerial work platform, crosswind loads, or boom rotation, lateral loads can easily form on the boom assembly. Increased lateral loads lead to increased lateral deflection of the boom assembly, i.e., increased lateral bending, causing lateral and vertical swaying. The cable chain end will bounce with the boom assembly's swaying, causing it to deviate from its normal trajectory, tilting inwards or outwards, posing a risk of inward collision with the boom assembly or severe outward interference with the machine housing. If the cable chain malfunctions, operation from the machine is likely to fail, resulting in safety risks such as being trapped at height or falling.

[0004] Existing technologies primarily address the arrangement of cable carriers and the prevention of cable carrier sagging, without considering the lateral swaying issue during cable carrier extension and retraction. Therefore, for construction machinery with boom assemblies, the risk of collisions between the cable carrier's inner slope and the boom assembly, and between its outer slope and the machine hood, cannot be avoided. Summary of the Invention

[0005] The purpose of this invention is to provide a cable chain protection device, boom equipment, and engineering machinery to solve the technical problem that cable chains in the prior art are prone to tilting inward or flipping outward.

[0006] To achieve the above objectives, the present invention provides a cable chain protection device for a boom assembly, wherein a cable chain is connected to the side wall of the boom assembly, and the cable chain protection device includes:

[0007] A correction mechanism is used to be installed on the cable chain and to drive the cable chain away from or towards the boom assembly along the boom width direction of the boom assembly.

[0008] A rangefinder is used to detect the current clearance between the cable chain and the boom assembly along the boom width direction;

[0009] The controller is electrically connected to the correction mechanism and the rangefinder, and the controller is configured to:

[0010] Obtain the current gap;

[0011] Based on the current gap and the preset gap range, the correction mechanism is controlled to drive the cable chain away from or towards the boom assembly along the boom width direction until the current gap is within the preset gap range.

[0012] In this embodiment of the invention, the correction mechanism includes:

[0013] A correction component extends along the boom width direction and one end can be connected to or detached from the boom assembly;

[0014] An adjustment drive is installed on the cable chain and connected to the other end of the correction assembly. The correction assembly can extend and retract relative to the cable chain along the arm width direction under the drive of the adjustment drive. Both the correction assembly and the adjustment drive are electrically connected to the controller.

[0015] The controller is configured to control the correction mechanism to move the cable chain away from or towards the boom assembly along the boom width direction, including: the controller is configured to:

[0016] The adjustment drive is controlled to drive the correction assembly closer to the boom assembly, so that the correction assembly is connected to the boom assembly;

[0017] The adjustment drive unit is controlled to drive the correction assembly to extend or retract, so that the cable chain moves away from or closer to the boom assembly under the drive of the correction assembly.

[0018] In this embodiment of the invention, the cable chain protection device further includes an extension detector for detecting the current extension distance of the boom assembly, the extension detector being electrically connected to the controller, and the controller being further configured to:

[0019] When the current extension meets the preset avoidance conditions, the correction component is controlled to disengage from the boom assembly, and the correction component is driven to retract to the avoidance position by the adjustment drive, so that the correction component avoids the boom assembly.

[0020] In an embodiment of the invention, the controller is configured to control the adjustment drive to drive the correction assembly closer to the boom assembly, comprising: the controller is configured to:

[0021] When the current extension meets the preset support conditions, the adjustment drive is controlled to drive the correction assembly to extend according to the current gap, and the correction assembly is used to connect the boom assembly and the cable chain.

[0022] The controller is configured to control the adjustment drive to extend or retract the correction assembly, including that the controller is configured to:

[0023] Determine the minimum distance between the current gap and the upper and lower limits of the preset gap range to obtain the adjustment difference;

[0024] The adjustment driver is controlled to drive the correction component based on the adjustment difference.

[0025] In this embodiment of the invention, the correction component includes:

[0026] The mounting bracket extends along the arm width direction and is connected to the adjustment drive component. The mounting bracket is telescopic relative to the cable chain along the arm width direction.

[0027] An electromagnet is mounted on the mounting bracket and electrically connected to the controller;

[0028] The controller is configured to control the adjusting drive to drive the correction assembly closer to the boom assembly, including: the controller is configured to:

[0029] According to the current gap, the adjustment drive is controlled to drive the correction assembly to extend, and the electromagnet is energized to connect the mounting frame and the boom assembly through electromagnetic adsorption.

[0030] In this embodiment of the invention, the correction mechanism further includes a positioning detection element for detecting whether the mounting bracket has extended into place, and the positioning detection element is electrically connected to the controller;

[0031] The controller is configured to control the energization of the electromagnet, including: the controller is configured to:

[0032] When the mounting bracket is extended into position, the electromagnet is energized.

[0033] In this embodiment of the invention, the positioning detection element is a force sensor connected between the mounting bracket and the adjustment drive element.

[0034] In this embodiment of the invention, the correction assembly further includes a roller for rolling contact with the boom assembly, and the electromagnet is connected between the roller and the mounting frame.

[0035] The present invention also proposes a boom device, which includes a boom assembly, a cable chain, and a cable chain protection device as described above.

[0036] The present invention also proposes an engineering machine, which includes the boom equipment described above.

[0037] Through the above technical solution, the cable chain protection device provided in this embodiment of the invention has the following beneficial effects:

[0038] When a cable chain protection device is used to protect the cable chain on the boom assembly, during the extension and retraction of the boom assembly, the controller can obtain the current gap between the cable chain and the boom assembly along the boom width direction via a rangefinder. The preset gap range can be preset according to actual usage requirements. If the current gap is not within the preset gap range, the controller can control the correction mechanism to move the cable chain away from or towards the boom assembly along the boom width direction. If the cable chain tilts inward, causing the current gap to be less than the preset gap range, the controller can control the correction mechanism to move the cable chain away from the boom assembly along the boom width direction until the current gap is within the preset gap range, thus avoiding the risk of the cable chain colliding with the boom assembly due to inward tilting. If the cable chain tilts outward, causing the current gap to be greater than the preset gap range, the controller can control the correction mechanism to move the cable chain towards the boom assembly along the boom width direction until the current gap is within the preset gap range, thus avoiding the risk of the cable chain colliding with the machine cover due to outward tilting. The cable chain protection device in this invention, through the cooperation of the correction mechanism, the rangefinder and the controller, can correct the deviation according to the current gap between the cable chain and the boom assembly, avoiding the risk of collision caused by the cable chain tilting inward or flipping outward, and greatly improving the safety of the boom assembly and the cable chain.

[0039] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0040] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings:

[0041] Figure 1 This is a structural schematic diagram of a boom device in one state according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the boom device in another state according to one embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the boom device according to an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of the structure of a drag chain protection device according to an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures

[0046] Label Name Label Name

[0047] 100 Cable chain protection device 2 Distance measuring device

[0048] 1. Correction mechanism 200 boom equipment

[0049] 11 Correction assembly 210 Boom assembly

[0050] 111 Mounting Frame 10 Basic Arm

[0051] 112 Electromagnets 20 Telescopic Arm

[0052] 113 Rollers 220 Cable Carrier

[0053] 12 Adjustment drive components Detailed Implementation

[0054] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0055] The drag chain protection device 100 according to the present invention is described below with reference to the accompanying drawings.

[0056] like Figures 1 to 4 As shown, the cable chain protection device 100 is used for the boom assembly 210, and the side wall of the boom assembly 210 is connected to the cable chain 220. The cable chain protection device 100 includes a correction mechanism 1, a rangefinder 2, and a controller. The correction mechanism 1 is used to install on the cable chain 220 and drive the cable chain 220 away from or towards the boom assembly 210 along the boom width direction. The rangefinder 2 is used to detect the current gap between the cable chain 220 and the boom assembly 210 along the boom width direction. The controller is electrically connected to the correction mechanism 1 and the rangefinder 2.

[0057] The controller is configured as follows:

[0058] Get the current gap;

[0059] Based on the current gap and the preset gap range, the control correction mechanism 1 drives the drag chain 220 to move away from or closer to the boom assembly 210 along the boom width direction until the current gap is within the preset gap range.

[0060] Understandably, the arm width direction is Figure 1 The left and right directions, the arm length direction is Figure 1 In the forward and backward direction, the boom assembly 210 can extend and retract in this direction. In this embodiment, the boom assembly 210 may include a basic boom 10 and multiple telescopic booms 20 that can extend and retract relative to the basic boom 10. The number of telescopic booms 20 can be set according to actual usage requirements. Figure 3As shown, in one embodiment, there are two telescopic booms 20. The rear end of the cable chain 220 is connected to the base boom 10, and the front end of the cable chain 220 is connected to the telescopic boom 20. When the telescopic boom 20 extends or retracts relative to the base boom 10, the boom assembly 210 can drive the cable chain 220 to move synchronously. In one embodiment, the rangefinder 2 can be a distance sensor. The cable chain 220 can include a chain link and a support section connected to the front end of the chain link. The support section and the chain link can be connected by a connecting support. The correction mechanism 1 and the rangefinder 2 can both be installed on the support section near the connecting support. In other embodiments, the positions of the correction mechanism 1 and the rangefinder 2 can be adjusted according to actual usage requirements.

[0061] In this embodiment, the hydraulic hoses of the construction machinery are placed inside the fully enclosed drag chain 220 to protect them, so that no hydraulic hoses are exposed around the boom assembly 210 and are scattered. The construction machinery can be a medium-high meter or even ultra-high meter aerial work platform.

[0062] When the cable chain protection device 100 in this embodiment protects the cable chain 220 on the boom assembly 210, during the extension and retraction of the boom assembly 210, the controller can obtain the current gap between the cable chain 220 and the boom assembly 210 along the boom width direction through the rangefinder 2. The preset gap range can be preset according to actual usage requirements. If the current gap is not within the preset gap range, the controller can control the correction mechanism 1 to drive the cable chain 220 away from or closer to the boom assembly 210 along the boom width direction. When the cable chain 220 tilts inward, it causes... If the current gap is less than a preset gap range, the controller can control the correction mechanism 1 to move the cable chain 220 away from the boom assembly 210 along the boom width direction until the current gap is within the preset gap range. This avoids the risk of the cable chain 220 colliding with the boom assembly 210 due to inward tilting. If the cable chain 220 tilts outward, causing the current gap to exceed the preset gap range, the controller can control the correction mechanism 1 to move the cable chain 220 closer to the boom assembly 210 along the boom width direction until the current gap is within the preset gap range. This avoids the risk of the cable chain 220 colliding with the machine cover due to outward tilting. In this embodiment, the cable chain protection device 100, through the cooperation of the correction mechanism 1, the rangefinder 2, and the controller, can correct the current gap between the cable chain 220 and the boom assembly 210, avoiding the risk of collision caused by the cable chain 220 tilting inward or overturning outward, greatly improving the safety of the boom assembly 210 and the cable chain 220.

[0063] Specifically, the correction mechanism 1 includes a correction component 11 and an adjustment drive component 12. The correction component 11 extends along the boom width direction and one end can be connected to or disconnected from the boom assembly 210. The adjustment drive component 12 is installed on the cable chain 220 and connected to the other end of the correction component 11. The correction component 11 can extend and retract relative to the cable chain 220 along the boom width direction under the drive of the adjustment drive component 12. Both the correction component 11 and the adjustment drive component 12 are electrically connected to the controller.

[0064] The controller is configured to control the correction mechanism 1 to drive the cable chain 220 away from or towards the boom assembly 210 along the boom width direction. The controller is configured to:

[0065] The control adjustment drive 12 drives the correction assembly 11 closer to the boom assembly 210, so that the correction assembly 11 connects to the boom assembly 210;

[0066] The control adjustment drive 12 drives the correction assembly 11 to extend or retract, so that the cable chain 220 moves away from or closer to the boom assembly 210 under the drive of the correction assembly 11.

[0067] like Figures 1 to 3 As shown, in this embodiment, the basic arm 10 is a single-section arm, and there are two telescopic arms 20. The two telescopic arms 20 are a second-section arm sleeved on the first-section arm and a third-section arm sleeved on the second-section arm, respectively. One end of the cable chain 220 is connected to the front end of the first-section arm, and the other end is connected to the front end of the third-section arm. The correction mechanism 1 can be connected to the side web plate of the boom assembly 210. When the boom assembly 210 is in the fully retracted state, the correction mechanism 1 is set corresponding to the basic arm 10. When the boom assembly 210 extends, the telescopic movements of the cable chain 220 and the boom assembly 210 are coordinated, and the correction mechanism 1 can move from the position of the first-section arm to the position of the second-section arm.

[0068] In this embodiment, the adjusting drive 12 can be a linear motor. The correction component 11 extends in the left-right direction and can extend and retract relative to the cable chain 220 in the left-right direction under the drive of the adjusting drive 12. When the current gap is not within the preset gap range, the adjusting drive 12 can drive the correction component 11 to extend relative to the cable chain 220 towards the boom assembly 210, and the correction component 11 and the boom assembly 210 are fixedly connected, so that the end of the correction component 11 facing the boom assembly 210 is relatively fixed to the boom assembly 210. The controller can obtain the current gap and the preset gap range and control the adjusting drive 12 to drive the correction component 11 to extend or retract. Specifically, when the current gap is less than the preset gap range, the adjusting drive 12 drives the correction component 11 to extend. The boom assembly 210 is heavy, and the correction component 11 cannot push the boom assembly 210. Under the reaction force of the boom assembly 210, the correction component 11 can drive the cable chain 220 away from the boom assembly 210. When the current gap is greater than the preset gap range, the adjustment drive 12 drives the correction component 11 to retract. Since the connection between the correction component 11 and the boom assembly 210 is relatively fixed, the correction component 11 can drive the drag chain 220 to move towards the boom assembly 210 until the current gap is within the preset gap range.

[0069] After the correction between the cable chain 220 and the boom assembly 210 is completed, the controller can control the correction component 11 to disengage from the boom assembly 210, preventing the cable chain 220 from being unable to move normally due to the relative fixation of the correction component 11 and the boom assembly 210. The adjusting drive component 12 is fixed to the cable chain 220. One end of the correction component 11 is connected to the adjusting drive component 12, and the other end can be fixedly connected to or disengaged from the boom assembly 210 under the control of the controller. When the correction component 11 is fixedly connected to the boom assembly 210, the correction component 11 can use the connection point with the boom assembly 210 as a fulcrum to drive the cable chain 220 closer to or further away from the boom assembly 210. The structure is simple and the control precision is high.

[0070] In one embodiment, the cable chain protection device 100 further includes an extension detector for detecting the current extension of the boom assembly 210, the extension detector being electrically connected to a controller, the controller being further configured to:

[0071] When the current extension meets the preset avoidance conditions, the correction component 11 is controlled to disengage from the boom assembly 210, and the correction component 11 is driven to retract to the avoidance position by adjusting the drive component 12, so that the correction component 11 avoids the boom assembly 210.

[0072] In this embodiment, the extension detector can be a cable sensor installed on the boom assembly 210. The controller can obtain the current extension of the boom assembly 210 through the extension detector. Since the movement of the cable chain 220 and the extension of the boom assembly 210 are coordinated, the controller can determine the position of the correction mechanism 1 relative to the boom assembly 210 through the current extension. The front ends of the basic boom 10 and the telescopic boom 20 are both provided with protruding frame structures. The preset avoidance conditions include multiple first preset extension ranges. By comparing the current extension with the first preset extension range, it can be determined whether the correction mechanism 1 is close to the basic boom 10 or the telescopic boom. When the protruding frame structure on the telescopic arm 20 meets the preset avoidance conditions (i.e., the correction mechanism 1 is close to the protruding frame structure on the basic arm 10 or the telescopic arm 20), the controller can control the correction component 11 to disengage from the boom assembly 210 and control the adjusting drive component 12 to drive the correction component 11 to retract relative to the cable chain 220 until it retracts to the avoidance position. This allows the correction component 11 to avoid the protruding frame structure during the extension and retraction of the boom assembly 210, avoiding the risk of collision between the correction component 11 and the boom assembly 210, and further improving the stability and intelligence of the cable chain protection device 100. In this embodiment, the first preset extension range can be specifically set according to the length of the basic arm 10 and the telescopic arm 20.

[0073] It should be noted that the controller is configured to control the adjustment drive 12 to drive the correction assembly 11 close to the boom assembly 210, including: the controller is configured to:

[0074] When the current extension meets the preset support conditions, the drive component 12 is adjusted according to the current gap to drive the correction component 11 to extend, and the boom assembly 210 and the cable chain 220 are connected through the correction component 11.

[0075] The controller is configured to control the adjustment drive 12 to drive the correction assembly 11 to extend or retract, including the controller being configured to:

[0076] Determine the minimum distance between the current gap and the upper and lower limits of the preset gap range to obtain the adjustment difference;

[0077] The adjustment difference controls the adjustment drive 12 to drive the correction component 11.

[0078] The preset support conditions in this embodiment include multiple second preset extension ranges, which can be specifically set according to the lengths of the basic arm 10 and the telescopic arm 20. In one embodiment, when the current extension meets the preset avoidance conditions, that is, the distance between the correction mechanism 1 and the protruding frame structure is less than the first preset distance range,

[0079] The controller controls the correction mechanism 1 to enter the avoidance mode. When the current extension meets the preset support conditions, i.e., the distance between the correction mechanism 1 and the protruding frame structure is greater than a second preset distance range, the controller controls the correction mechanism 1 to enter the correction mode. Based on the adjustment difference, the controller controls the adjustment drive 12 to drive the correction component 11 to approach the component and connect with the boom assembly 210, and determines the minimum distance between the current gap and the upper and lower limits of the preset gap range to obtain the adjustment difference. Finally, based on the adjustment difference, the controller controls the adjustment drive 12 to drive the correction component 11 to extend or retract. In this embodiment, the corresponding control mode is automatically entered according to the current extension of the boom assembly 210, which can improve the intelligence of the cable chain protection device 100.

[0080] like Figure 4 As shown, the correction assembly 11 includes a mounting bracket 111 and an electromagnet 112. The mounting bracket 111 extends along the arm width direction and is connected to the adjustment drive component 12. The mounting bracket 111 can extend and retract relative to the cable chain 220 along the arm width direction. The electromagnet 112 is mounted on the mounting bracket 111 and is electrically connected to the controller.

[0081] The controller is configured to control the adjustment drive 12 to drive the correction assembly 11 closer to the boom assembly 210. The controller is configured to:

[0082] According to the current gap control adjustment drive 12, drive the correction component 11 to extend, and control the electromagnet 112 to be energized, so as to connect the mounting bracket 111 and the boom assembly 210 through electromagnetic adsorption.

[0083] In this embodiment, the mounting bracket 111 and the adjustment drive component 12 are connected, and the electromagnet 112 is mounted on the mounting bracket 111 at the end away from the adjustment drive component 12. The boom assembly 210 is a metal component that can be magnetically attracted. In this embodiment, the controller can connect the correction component 11 and the boom assembly 210 by controlling the electromagnet 112 to be energized, and disconnect the correction component 11 and the boom assembly 210 by controlling the electromagnet 112 to be de-energized. The fixed connection or disconnection of the correction component 11 and the boom assembly 210 can be achieved simply by turning the power on and off. The structure is simple and easy to control.

[0084] In one embodiment, the correction mechanism 1 further includes a positioning detection element for detecting whether the mounting bracket 111 has extended into position, and the positioning detection element is electrically connected to the controller;

[0085] The controller is configured to energize the electromagnet 112, including: The controller is configured to:

[0086] With the mounting bracket 111 extended into position, the control electromagnet 112 is energized.

[0087] In this embodiment, the positioning detection device can detect whether the mounting bracket 111 has extended into position. When the mounting bracket 111 has extended into position and the mounting bracket 111 and the boom assembly 210 can be connected by electromagnetic adsorption, the controller controls the electromagnet 112 to be energized. This can prevent the cable chain 220 from moving due to magnetic adsorption caused by premature energization, and can improve the accuracy of cable chain 220 adjustment.

[0088] Specifically, the positioning detection element is a force sensor connected between the mounting bracket 111 and the adjustment drive element 12. The force sensor can be a piezoresistive resistor or a spring balance. When the force sensor detects that the force between the mounting bracket 111 and the adjustment drive element 12 is greater than zero, that is, when the boom assembly 210 presses the mounting bracket 111 against the adjustment drive element 12, the controller can obtain that the mounting bracket 111 has extended into position. In other embodiments, the positioning detection element can be other ranging structures.

[0089] In this embodiment of the invention, the correction assembly 11 further includes a roller 113 for rolling contact with the boom assembly 210, and an electromagnet 112 is connected between the roller 113 and the mounting bracket 111.

[0090] In this embodiment, the roller 113 can be made of nylon. When the electromagnet 112 is energized, it presses the roller 113 against the boom assembly 210. After the controller completes the correction and de-energizes the electromagnet 112, allowing the mounting bracket 111 to detach from the boom assembly 210, the roller 113 on the mounting bracket 111 can roll and engage with the boom assembly 210, ensuring the smooth movement of the cable chain 220 and preventing the cable chain 220 from tilting inward to a certain extent. In this embodiment, the mounting bracket 111 is made of non-magnetic metal.

[0091] In one embodiment, to ensure that the roller 113 retracts to the avoidance position, the electromagnet 112 is equipped with a limit switch capable of detecting the distance between the cable chain 220 and the electromagnet 112. The limit switch is electrically connected to the controller, and the controller can shut down the linear motor when the roller 113 retracts to the avoidance position. In another embodiment, the cable chain 220 may be equipped with a mechanical limiting structure for the limiting roller 113. The controller can detect the resistance of the linear motor, and can shut down the linear motor when the resistance increases.

[0092] Specifically, when the boom assembly 210 is just extended, the alignment mechanism 1 is on the side of one boom section, and the roller 113 rolls on the web of the first boom section. A cable sensor installed on the boom assembly 210 measures the current extension distance of the boom assembly 210. The movement of the cable chain 220 is coordinated with the extension and retraction of the boom, and the position of the alignment mechanism 1 can be determined by the current extension distance. When the alignment mechanism 1 is about to leave the side web of the first boom section and move to the second boom section, the controller can first de-energize the electromagnet 112, and then control the linear motor to automatically retract the roller 113, preventing the alignment mechanism 1 from colliding with the head of the first boom section. When the alignment mechanism 1 enters the side web of the second boom section, the controller controls the linear motor to extend the roller 113. When the force sensor between the linear motor and the mounting bracket 111 detects pressure > 0, the controller makes the electromagnet 112 conductive, and the magnetic force presses the roller 113 tightly against the side web. In this embodiment, the rangefinder 2 can be a proximity switch or a radar ranging sensor to detect the current gap between the cable chain 220 and the side web plate of the boom assembly 210. If the current gap is not within the preset gap range, the controller causes the linear motor to move towards or away from the boom assembly 210.

[0093] This invention also proposes a boom device 200, which includes a boom assembly 210, a cable chain 220, and a cable chain protection device 100 as described above. The specific structure of the cable chain protection device 100 is as described in the above embodiments. Since the boom device 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The boom device 200 is covered by a hood over the boom assembly 210, the cable chain 220, and the cable chain protection device 100. In this embodiment, the cable chain protection device 100 can monitor the distance between the cable chain 220 and the boom assembly 210 at any time and adjust the distance between the cable chain 220 and the boom assembly 210. When the boom assembly 210 extends or retracts, it can synchronously control the lateral swing of the cable chain 220 to return to its original position.

[0094] This invention also proposes an engineering machinery, which includes the boom device 200 as described above. The specific structure of the boom device 200 is as described in the above embodiments. Since the engineering machinery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. In one embodiment, the engineering machinery is a boom-type aerial work platform.

[0095] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0096] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cable chain protection device for a boom assembly (210), wherein a cable chain (220) is connected to the side wall of the boom assembly (210), characterized in that, The cable chain protection device (100) includes: The correction mechanism (1) is installed on the cable chain (220) and drives the cable chain (220) away from or closer to the boom assembly (210) along the boom width direction of the boom assembly (210). Rangefinder (2) for detecting the current gap between the cable chain (220) and the boom assembly (210) along the boom width direction; The controller is electrically connected to the correction mechanism (1) and the rangefinder (2), and the controller is configured to: Obtain the current gap; Based on the current gap and the preset gap range, the correction mechanism (1) is controlled to drive the cable chain (220) away from or closer to the boom assembly (210) along the boom width direction until the current gap is within the preset gap range; The correction mechanism (1) includes: The correction component (11) extends along the boom width direction and one end can be connected to or detached from the boom assembly (210). Adjustment drive (12) is installed on the cable chain (220) and connected to the other end of the correction assembly (11); The correction component (11) includes: Mounting bracket (111) extends along the arm width direction and is connected to the adjustment drive (12). Mounting bracket (111) is telescopic relative to the cable chain (220) along the arm width direction. An electromagnet (112) is mounted on the mounting bracket (111) and electrically connected to the controller.

2. The cable chain protection device according to claim 1, characterized in that, The correction component (11) can extend and retract relative to the cable chain (220) along the arm width direction under the drive of the adjustment drive (12). The correction component (11) and the adjustment drive (12) are both electrically connected to the controller. The controller is configured to control the correction mechanism (1) to drive the cable chain (220) away from or towards the boom assembly (210) along the boom width direction, including: the controller is configured to: The adjustment drive (12) is controlled to drive the correction assembly (11) to approach the boom assembly (210), so that the correction assembly (11) is connected to the boom assembly (210). The adjustment drive (12) is controlled to drive the correction assembly (11) to extend or retract, so that the cable chain (220) moves away from or closer to the boom assembly (210) under the drive of the correction assembly (11).

3. The cable chain protection device according to claim 2, characterized in that, The cable chain protection device (100) also includes an extension detector for detecting the current extension of the boom assembly (210), the extension detector being electrically connected to the controller, the controller being further configured to: When the current extension meets the preset avoidance conditions, the correction component (11) is controlled to disengage from the boom assembly (210), and the correction component (11) is driven to retract to the avoidance position by the adjustment drive (12), so that the correction component (11) avoids the boom assembly (210).

4. The cable chain protection device according to claim 3, characterized in that, The controller is configured to control the adjustment drive (12) to drive the correction assembly (11) closer to the boom assembly (210), including: the controller is configured to: When the current extension meets the preset support conditions, the adjustment drive (12) is controlled to drive the correction component (11) to extend according to the current gap, and the boom assembly (210) and the cable chain (220) are connected through the correction component (11). The controller is configured to control the adjustment drive (12) to drive the correction assembly (11) to extend or retract, including that the controller is configured to: Determine the minimum distance between the current gap and the upper and lower limits of the preset gap range to obtain the adjustment difference; The adjustment drive (12) is controlled to drive the correction component (11) according to the adjustment difference.

5. The cable chain protection device according to claim 2, characterized in that, The controller is configured to control the adjustment drive (12) to drive the correction assembly (11) closer to the boom assembly (210), including: the controller is configured to: According to the current gap, the adjustment drive (12) is controlled to drive the correction assembly (11) to extend, and the electromagnet (112) is controlled to be energized, so that the mounting bracket (111) and the boom assembly (210) are connected by electromagnetic adsorption.

6. The cable chain protection device according to claim 5, characterized in that, The correction mechanism (1) further includes a positioning detection element for detecting whether the mounting bracket (111) extends into position, and the positioning detection element is electrically connected to the controller; The controller is configured to energize the electromagnet (112) including: the controller is configured to: When the mounting bracket (111) is extended into position, the electromagnet (112) is energized.

7. The cable chain protection device according to claim 6, characterized in that, The positioning detection component is a force sensor connected between the mounting bracket (111) and the adjustment drive component (12).

8. The cable chain protection device according to claim 5, characterized in that, The correction assembly (11) also includes a roller (113) for rolling contact with the boom assembly (210), and the electromagnet (112) is connected between the roller (113) and the mounting bracket (111).

9. A boom device, characterized in that, The boom device (200) includes a boom assembly (210), a cable chain (220), and a cable chain protection device (100) as described in any one of claims 1 to 8.

10. An engineering machinery, characterized in that, The construction machinery includes the boom equipment (200) as described in claim 9.

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