Adjusting device and crane

Abstract

This utility model relates to the field of crane technology, and discloses an adjustment device and a crane. In this embodiment, the adjustment device is disposed within a telescopic boom, which includes a fixed boom and a telescopic boom slidably nested within the fixed boom. A counterweight is connected to the end of the telescopic boom facing away from the fixed boom. The adjustment device includes a telescopic mechanism, a detection unit, and a control unit. One end of the telescopic mechanism is mounted on the inner wall of the fixed boom, and the other end is connected to the inner wall of the telescopic boom. The telescopic mechanism is used to drive the telescopic boom to extend or retract from the fixed boom. The detection unit is used to continuously acquire environmental information in the external space where the telescopic boom is located. The control unit is electrically connected to the detection unit and the telescopic boom. The control unit is used to control the telescopic mechanism to extend and retract axially according to the environmental information, so as to adjust the position of the counterweight and avoid collision between the counterweight and external workpieces.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, specifically relating to an adjustment device and a crane. Background Technology

[0002] The counterweight balancing torque is a key factor in ensuring the stability of a crane. By calculating the crane's overturning moment and anti-overturning moment, the counterweight can effectively prevent the crane from overturning during operation. Currently, wheeled cranes mainly use adjustment devices to obtain different balancing torques, thereby adjusting the position of the counterweight to ensure the overall stability of the machine. Since the counterweight position affects the crane's operational flexibility, it can currently be adjusted according to specific working conditions to optimize the crane's operational performance. However, existing crane counterweight repositioning methods can only be changed to a few specific positions, which has limitations for diverse workspaces and lifting conditions, and cannot flexibly adjust the counterweight position to adapt to different working conditions. Utility Model Content

[0003] The purpose of this invention is to provide an adjustment device and a crane to solve the technical problem of poor counterweight position adjustment effect in the prior art.

[0004] To achieve the above objectives, this utility model provides an adjustment device disposed within a telescopic boom. The telescopic boom includes a fixed arm and a telescopic arm slidably nested within the fixed arm. A counterweight is connected to the end of the telescopic arm opposite to the fixed arm. The adjustment device includes:

[0005] The telescopic mechanism is installed on the inner wall of the fixed arm at one end and connected to the inner wall of the telescopic arm at the other end. The telescopic mechanism is used to drive the telescopic arm to extend or retract from the fixed arm.

[0006] The detection unit is used to continuously acquire environmental information about the external space where the telescopic boom is located;

[0007] The control unit is electrically connected to both the detection unit and the telescopic mechanism. The control unit is used to control the telescopic mechanism to extend and retract axially based on environmental information in order to adjust the position of the counterweight.

[0008] In an embodiment of this utility model, the telescopic arm includes a first arm section and a plurality of second arm sections that are nested together in a series of telescopic movements. The end of the first arm section that is away from the second arm section is nested inside a fixed arm. The plurality of second arm sections are nested together in a series of telescopic movements. The telescopic mechanism includes a linear telescopic member and a plurality of pulley assemblies. The linear telescopic member is used to drive the first arm section to move toward or away from the fixed arm. The plurality of pulley assemblies are used to drive the plurality of second arm sections to telescopic movements.

[0009] In an embodiment of this utility model, each pulley assembly corresponds to a second arm section, and each pulley assembly includes two pulley components and two ropes respectively wound around the pulley components. The two pulley components are arranged at intervals along the length direction of the second arm section.

[0010] In the pulley assembly at the head end, the first end of the rope on each pulley piece is connected to the fixed arm, and the second end is connected to the corresponding second arm segment.

[0011] In other pulley assemblies, the first end of the rope on each pulley component is connected to the previous second arm segment, and the second end is connected to the corresponding second arm segment.

[0012] In an embodiment of this utility model, in each pulley assembly, the second ends of the ropes on the two pulley components are respectively connected to the inner and outer sides of the bottom wall of the second arm section.

[0013] In an embodiment of this utility model, the adjustment device further includes a locking fastener and a rope support. Multiple rope supports are provided on both the fixed arm and the second arm section. The rope support has an installation hole for the rope to pass through, and the locking fastener is used to lock the end of the rope to the rope support.

[0014] In embodiments of this utility model, each pulley assembly further includes a pulley support for mounting two pulley components respectively;

[0015] In the pulley assembly located at the front end, the pulley support is installed on the bottom wall of the first arm section;

[0016] In other pulley assemblies, the pulley support is mounted on the bottom wall of the second arm section.

[0017] In an embodiment of this utility model, a clearance notch is provided on the first arm section for avoiding the pulley component.

[0018] In an embodiment of this utility model, the adjusting device further includes a cylinder support mounted on the bottom wall of the first arm section, the linear telescopic component is a telescopic cylinder, the piston rod of the telescopic cylinder is mounted on the fixed arm, and the cylinder of the telescopic cylinder is mounted on the cylinder support.

[0019] In an embodiment of this utility model, the adjusting device further includes a cylinder support, which is disposed on the inner wall of the fixed arm, and the piston rod of the telescopic cylinder is mounted on the cylinder support.

[0020] In an embodiment of this utility model, a crane is also provided, based on the adjustment device described above.

[0021] Through the above technical solutions, the adjusting device and crane provided by the embodiments of this utility model have the following beneficial effects:

[0022] In this embodiment, the adjustment device is located within the telescopic boom, which includes a fixed arm and a telescopic arm slidably nested within the fixed arm. A counterweight is connected to the end of the telescopic arm facing away from the fixed arm. The adjustment device includes a telescopic mechanism, a detection unit, and a control unit. One end of the telescopic mechanism is mounted on the inner wall of the fixed arm, and the other end is connected to the inner wall of the telescopic arm. The telescopic mechanism drives the telescopic arm to extend or retract from the fixed arm. The detection unit continuously acquires environmental information from the external space where the telescopic boom is located. The control unit is electrically connected to the detection unit and the telescopic boom. The control unit controls the telescopic mechanism to extend and retract axially based on the environmental information, thereby adjusting the position of the counterweight. In this embodiment, a detection unit is provided to acquire environmental information from the external space. When the detection unit detects that the distance between the counterweight and the external workpiece is far enough that there is no risk of collision, it can control the telescopic arm to extend from the fixed arm to adjust the position of the counterweight and meet the position adjustment requirements of the counterweight. When the detection unit detects that the current counterweight is too close to the external workpiece, posing a risk of collision, it can control the telescopic arm to retract into the fixed arm, thereby moving the counterweight and preventing it from colliding with the external workpiece. The control module of this application can control the telescopic mechanism to extend and retract based on received environmental information, thus flexibly adjusting the position of the counterweight and preventing collisions with the external workpiece.

[0023] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the 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. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the adjusting device in the retracted state according to this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the adjusting device in the extended state according to this utility model;

[0027] Figure 3 This is an enlarged schematic diagram of the adjusting device in the extended state according to the present invention.

[0028] Explanation of reference numerals in the attached figures

[0029] Detailed Implementation

[0030] The specific embodiments of this utility model 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 scope of this utility model.

[0031] The adjusting device and crane according to the present invention are described below with reference to the accompanying drawings.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, an adjustment device is proposed. This adjustment device is located within a telescopic boom, which includes a fixed arm 1 and a telescopic arm 2 slidably nested within the fixed arm 1. A counterweight 10 is connected to the end of the telescopic arm 2 facing away from the fixed arm 1. The adjustment device includes a telescopic mechanism 3, a detection unit, and a control unit. One end of the telescopic mechanism 3 is mounted on the inner wall of the fixed arm 1, and the other end is connected to the inner wall of the telescopic arm 2. The telescopic mechanism 3 is used to drive the telescopic arm 2 to extend or retract from the fixed arm 1. The detection unit is used to continuously acquire environmental information within the external space where the telescopic boom is located. The control unit is electrically connected to the detection unit and the telescopic boom. The control unit is used to control the telescopic mechanism 3 to extend and retract axially according to the environmental information, thereby adjusting the position of the counterweight 10. Figure 1 The central adjustment device is in the retracted state. Figure 2 The adjustment device is in the extended position.

[0033] This embodiment includes a detection unit for acquiring environmental information in the external space. When the detection unit detects that the distance between the counterweight 10 and the external workpiece is far enough that there is no risk of collision, it can control the telescopic arm 2 to extend from the fixed arm 1 to adjust the position of the counterweight 10 and meet the position adjustment requirements. Conversely, when the detection unit detects that the current distance between the counterweight 10 and the external workpiece is too close and there is a risk of collision, it can control the telescopic arm 2 to retract into the fixed arm 1, thereby moving the counterweight 10 and preventing it from colliding with the external workpiece. The control module of this application can control the telescopic mechanism 3 to perform telescopic movements based on the received environmental information, thereby flexibly adjusting the position of the counterweight 10 and preventing it from colliding with the external workpiece.

[0034] Furthermore, a lifting cylinder 8 is installed at the end of the telescopic arm 2 away from the fixed arm 1. A counterweight 10 is connected to the bottom of the lifting cylinder 8. By driving the lifting cylinder 8 to move along the height direction, the position of the counterweight 10 can be adjusted in the height direction. In this application, there are two lifting cylinders 8 to ensure stable lifting and lowering of the counterweight 10 along the height direction. The lifting cylinders 8 are hydraulic cylinders as used in the prior art. The axis is... Figure 3 The left and right directions, the height direction are... Figure 3The up and down directions in the middle.

[0035] like Figure 3 As shown, in this embodiment, the telescopic arm 2 includes a first arm section 21 and multiple second arm sections 22 that are nested together in a telescopic manner. The end of the first arm section 21 facing away from the second arm section 22 is nested inside the fixed arm 1. The multiple second arm sections 22 are nested together in a telescopic manner. The telescopic mechanism 3 includes a linear telescopic member and multiple pulley assemblies 32. The linear telescopic member is used to drive the first arm section 21 to move toward or away from the fixed arm 1, and the multiple pulley assemblies 32 are used to drive the multiple second arm sections 22 to telescopically move. In this application, by setting the linear telescopic member to drive the first arm section 21 to telescopically move, and the pulley assemblies 32 to drive the multiple second arm sections 22 to telescopically move, the position of the counterweight 10 is adjusted efficiently. The position adjustment of the counterweight 10 is more efficient and can be applied to various working conditions.

[0036] like Figure 3 As shown, taking one second arm segment 22 as an example, when the detection unit detects that the distance between the counterweight 10 and the external workpiece is far enough that there is no risk of collision, the control unit can drive the telescopic mechanism 3 to extend, thereby causing the first arm segment 21 and the second arm segment 22 to extend in sequence, thus adjusting the position of the counterweight in the horizontal direction to meet the position adjustment requirements of the counterweight 10. When the detection unit detects that the current distance between the counterweight 10 and the external workpiece is too close and there is a risk of collision, the control unit can drive the telescopic mechanism 3 to retract, thereby causing the first arm segment 21 and the second arm segment 22 to gradually retract into the fixed arm 1, avoiding collision between the counterweight 10 and the external workpiece.

[0037] Specifically, the control unit can employ the DWA (Dynamic Window Approach) algorithm to dynamically adjust the position of the counterweight 10 based on the environmental information collected in real time by the detection unit, ensuring that the counterweight 10 does not collide with external workpieces during operation. Furthermore, the control unit can also employ the PID (proportion integration differentiation) algorithm to optimize the operating parameters of the control unit, ensuring smooth and efficient adjustment of the counterweight 10's position. By employing the above algorithms, the control unit of this application can accurately calculate and evaluate various loads and infinitely adjust the counterweight position. Infinitely adjustable means that smooth adjustment can be performed within any range, ensuring that the crane can adapt to various working environments and achieve the optimal lifting capacity under these conditions, avoiding safety issues and crane damage caused by human error in existing technologies.

[0038] like Figure 3As shown, in this embodiment, each pulley assembly 32 corresponds to a second arm section 22. Each pulley assembly 32 includes two pulley components 321 and two ropes 322 respectively wound around the pulley components 321. The two pulley components 321 are arranged at intervals along the length direction of the second arm section 22.

[0039] In the pulley assembly 32 at the first end, the first end of the rope 322 on each pulley 321 is connected to the fixed arm 1, and the second end is connected to the corresponding second arm section 22.

[0040] In the other pulley assemblies 32, the first end of the rope 322 on each pulley component 321 is connected to the previous second arm section 22, and the second end is connected to the corresponding second arm section 22.

[0041] Taking the second arm segment 22 in this application as an example, such as Figure 3 As shown, the pulley assembly 32 at the first end is mounted on the first arm section 21. Specifically, one end of the rope 322 wound around the pulley 321 on the left side is connected to the inner wall of the fixed arm 1, and the other end is connected to the inner wall of the second arm section 22. The rope 322 wound around the pulley 321 on the right side is connected to one end of the outer wall of the fixed arm 1 and the other end of the outer wall of the second arm section 22. This ensures that when the linear telescopic member drives the first arm section 21 to telescopically move, the second arm section 22 can smoothly telescopically move along with the first arm section 21 with the assistance of the pulley assembly 32. This application adopts a two-stage rope-type displacement mechanism, which has higher displacement efficiency, a simpler structure, and lower dependence on space. It can adapt to more and narrower working conditions and obtain a larger range of balance torque variation and a larger upper limit of balance torque.

[0042] In other embodiments, if there are multiple second arm sections 22, the pulley assembly 32 is not installed on the second arm section 22 connected to the counterweight, but only on the other second arm sections 22, which can ensure that the multiple second arm sections 22 can perform smooth telescopic movements.

[0043] like Figure 3 As shown, in this embodiment, in each pulley assembly 32, the second ends of the ropes 322 on the two pulley components 321 are respectively connected to the inner and outer sides of the bottom wall of the second arm section 22, so as to ensure that both the inner and outer sides of the second arm section 22 are affected by the tension of the ropes 322, thus ensuring the stability of the telescopic adjustment of the second arm section 22.

[0044] like Figure 3As shown, in this embodiment, the adjustment device further includes locking fasteners and rope supports 4. Multiple rope supports 4 are provided on both the fixed arm 1 and the second arm section 22. Each rope support 4 has a mounting hole through which a rope 322 passes. The locking fasteners are used to lock the end of the rope 322 to the rope support 4. Specifically, one rope support 4 is provided on each of the inner and outer walls of the second arm section 22, and the same applies to the inner and outer walls of the fixed arm 1. The two rope supports 4 on the inner wall are used to install and fix the rope 322 of the left pulley component 321, and the two rope supports 4 on the outer wall are used to install and fix the rope 322 of the right pulley component 321. By using locking fasteners to fix the rope 322 to the rope supports 4, the installation stability is good.

[0045] like Figure 3 As shown, in this embodiment, each pulley assembly 32 also includes a pulley support 5 for mounting two pulley components 321 respectively. In the pulley assembly 32 located at the first end, the pulley support 5 is mounted on the bottom wall surface of the first arm section 21, and in the other pulley assemblies 32, the pulley support 5 is mounted on the bottom wall surface of the second arm section 22.

[0046] Specifically, such as Figure 3 As shown, there are two pulley supports 5. The pulley support 5 on the left is located on the inner side of the bottom wall of the first arm section 21 to avoid interfering with the telescopic movement between the first arm section 21 and the fixed arm 1. The pulley support 5 on the right is located on the outer side of the bottom wall of the first arm section 21 to avoid interfering with the telescopic movement between the first arm section 21 and the second arm section 22. It should be noted that a clearance is left between the pulley component 321 on the left and the inner wall surface of the fixed arm 1 to prevent the pulley component 321 and the rope 322 on the pulley component 321 from directly contacting the inner wall surface of the fixed arm 1. Similarly, a clearance is left between the pulley component 321 on the right and the outer wall surface of the second arm section 22 to prevent the pulley component 321 and the rope 322 on the pulley component 321 from directly contacting the outer wall surface of the second arm section 22, thus preventing any impact on the telescopic movement between the fixed arm 1, the first arm section 21, and the second arm section 22.

[0047] like Figure 3 As shown, in this embodiment, the first arm section 21 is provided with a clearance notch for avoiding the pulley component 321. There are two clearance notches, which are spaced apart in the left and right direction. The clearance notches are opened at the corresponding pulley support 5 to avoid the pulley component 321 installed on the pulley support 5 from directly contacting the first arm section 21.

[0048] In this embodiment, the adjustment device further includes a cylinder support 6 installed on the bottom wall of the first arm section 21. The cylinder support 6 is located on the inner wall surface of the first arm section 21. The linear telescopic component is a telescopic cylinder in the prior art. The piston rod 311 of the telescopic cylinder is installed on the fixed arm 1, and the cylinder 312 of the telescopic cylinder is installed on the cylinder support 6. The cylinder support 6 plays the role of stably supporting the cylinder 312.

[0049] Specifically, when the detection unit detects that the distance between the counterweight 10 and the external workpiece is far enough that there is no risk of collision, the control unit can drive the cylinder 312 to extend and move to the right, thereby causing the first arm section 21 to extend. Under the pull of the pulley assembly 32, the second arm section 22 will also extend synchronously with the first arm section 21, thereby causing the counterweight 10 to move horizontally, realizing the adjustment of the position of the counterweight 10 in the horizontal direction. At the same time, the lifting cylinder 8 can also drive the counterweight 10 to move along the height direction, thereby realizing the adjustment of the position of the counterweight 10 in the height direction. However, when the detection unit detects that the current distance between the counterweight 10 and the external workpiece is too close and there is a risk of collision, the control unit can drive the cylinder 312 to retract and move to the left, thereby causing the first arm section 21 to gradually retract into the fixed arm 1. Under the pull of the pulley assembly 32, the second arm section will also gradually retract into the first arm section 21, avoiding the collision between the counterweight 10 and the external workpiece.

[0050] like Figure 3 As shown, in this embodiment, the adjustment device also includes a cylinder support 7, which is located on the inner wall of the fixed arm 1. The piston rod 311 of the telescopic cylinder is mounted on the cylinder support 7 to support the piston rod 311, so as to ensure that the piston rod 311 can stably drive the cylinder 312 to perform telescopic movement.

[0051] In this embodiment, a crane is also proposed, according to the adjusting device described above. Since the crane employs all embodiments of the adjusting device in this application, it also possesses all the beneficial effects of the adjusting device, which will not be described in detail here.

[0052] In the description of this utility model, 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0054] 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.

[0055] 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. An adjustment device, disposed within a telescopic boom, characterized in that, The telescopic boom includes a fixed arm (1) and a telescopic arm (2) that is slidably nested within the fixed arm (1). A counterweight (10) is connected to the end of the telescopic arm (2) facing away from the fixed arm (1). The adjustment device includes: The telescopic mechanism (3) is installed on the inner wall of the fixed arm (1) at one end and connected to the inner wall of the telescopic arm (2) at the other end. The telescopic mechanism (3) is used to drive the telescopic arm (2) to extend or retract from the fixed arm (1). The detection unit is used to continuously acquire environmental information of the external space where the telescopic boom is located; The control unit is electrically connected to both the detection unit and the telescopic mechanism (3). The control unit is used to control the telescopic mechanism (3) to move axially according to the environmental information in order to adjust the position of the counterweight (10).

2. The adjusting device according to claim 1, characterized in that, The telescopic arm (2) includes a first arm section (21) and a plurality of second arm sections (22) that are nested together in a telescopic manner. The end of the first arm section (21) that is away from the second arm section (22) is nested in the fixed arm (1). The plurality of second arm sections (22) are nested together in a telescopic manner. The telescopic mechanism (3) includes a linear telescopic member and a plurality of pulley assemblies (32). The linear telescopic member is used to drive the first arm section (21) to move toward or away from the fixed arm (1). The plurality of pulley assemblies (32) are used to drive the plurality of second arm sections (22) to telescopically move.

3. The adjusting device according to claim 2, characterized in that, Each of the pulley assemblies (32) corresponds to one of the second arm sections (22). Each of the pulley assemblies (32) includes two pulley components (321) and two ropes (322) respectively wound around the pulley components (321). The two pulley components (321) are arranged at intervals along the length direction of the second arm section (22). In the pulley assembly (32) located at the first end, the first end of the rope (322) on each pulley piece (321) is connected to the fixed arm (1), and the second end is connected to the corresponding second arm section (22); In the other pulley assemblies (32), the first end of the rope (322) on each pulley member (321) is connected to the previous second arm segment (22), and the second end is connected to the corresponding second arm segment (22).

4. The adjusting device according to claim 3, characterized in that, In each of the pulley assemblies (32), the second ends of the ropes (322) on the two pulley pieces (321) are respectively connected to the inner and outer sides of the bottom wall of the second arm section (22).

5. The adjusting device according to claim 3, characterized in that, The adjustment device also includes a locking fastener and a rope support (4). Both the fixed arm (1) and the second arm section (22) are provided with multiple rope supports (4). The rope support (4) has a mounting hole through which the rope (322) passes. The locking fastener is used to lock the end of the rope (322) to the rope support (4).

6. The adjusting device according to claim 3, characterized in that, Each of the pulley assemblies (32) also includes a pulley support (5) for mounting two of the pulley components (321); In the pulley assembly (32) located at the first end, the pulley support (5) is installed on the bottom wall surface of the first arm section (21); In the other pulley assemblies (32), the pulley support (5) is mounted on the bottom wall of the second arm section (22).

7. The adjusting device according to claim 3, characterized in that, The first arm section (21) has a clearance notch for avoiding the pulley component (321).

8. The adjusting device according to claim 2, characterized in that, The adjustment device also includes a cylinder support (6) installed on the bottom wall of the first arm section (21). The linear telescopic component is a telescopic cylinder. The piston rod (311) of the telescopic cylinder is installed on the fixed arm (1), and the cylinder (312) of the telescopic cylinder is installed on the cylinder support (6).

9. The adjusting device according to claim 8, characterized in that, The adjustment device also includes a cylinder support (7), which is located on the inner wall of the fixed arm (1), and the piston rod (311) of the telescopic cylinder is mounted on the cylinder support (7).

10. A crane, characterized in that, The adjusting device according to any one of claims 1 to 9.

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