Boom connecting structure and crane

Abstract

The utility model provides an arm support connecting structure and a crane, the arm support connecting structure is characterized in that an arm support assembly comprises a balance arm and a cargo boom, the outer side wall of the balance arm and the outer side wall of the cargo boom are respectively provided with a mounting pin, and the mounting pins extend along the arm width direction of the arm support assembly; two mounting holes are formed in the movable clamping plate, and the two mounting pins are used for correspondingly penetrating through the two mounting holes respectively; and the anti-falling limiting piece is detachably connected with the mounting pin and is used for limiting the movable clamping plate on the mounting pin. According to the arm support connecting structure, the balance arm and the cargo boom are connected through the movable clamping plate, a matching structure of a male joint and a female joint in the prior art is omitted, the balance arm and the cargo boom can be disassembled and assembled only by penetrating the mounting pin through the mounting hole and detachably connecting the mounting pin with the anti-falling limiting piece, and the arm support connecting structure is convenient to mount and high in practicability. The operation of violently penetrating and pulling the pin when the cargo boom is assembled and disassembled is omitted, the requirement for the installation space is low, quick assembly and disassembly can be achieved, and the assembly and disassembly efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a boom connection structure and a crane. Background Art

[0002] The connection and fixation of the boom and the balance arm of the current tower crane are mostly connected by a pin shaft. The connection between the boom and the balance arm adopts the form of a male and female joint. The pin shaft must not only pass through the concentric circular holes on the male and female joints, but also be exposed 30cm-40cm relative to the male and female joints to achieve the connection and fixation of the boom and the balance arm. When disassembling the boom, the connection pin shaft needs to be completely removed or inserted from the circular hole of the male and female joints before the boom can be disassembled.

[0003] However, due to the complex structure of the male and female joints and the large amount of welding work on the male and female joints, the processing requirements for the male and female joints are high, and the pin shaft needs to be completely knocked in or out of the pin shaft hole, which has certain requirements for the operating space, resulting in difficulty in disassembling and assembling the crane arm and low disassembly and assembly efficiency. Utility Model Content

[0004] The main purpose of the utility model is to provide a boom connection structure and a crane, aiming to solve the technical problem of low disassembly and assembly efficiency of boom components in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a boom connection structure, which includes: a boom assembly, including a balance arm and a lifting arm, the outer side wall of the balance arm and the outer side wall of the lifting arm are both provided with mounting pins, and the mounting pins extend along the arm width direction of the boom assembly; a movable clamping plate, which is provided with two mounting holes, and the two mounting pins are used to respectively pass through the two mounting holes; an anti-slip limit piece, which is detachably connected to the mounting pin and is used to limit the movable clamping plate on the mounting pin.

[0006] In an embodiment of the utility model, the mounting pin is radially provided with a limiting hole for inserting the anti-slip limiting member, the distance between the limiting hole and the fixed end of the mounting pin is D, the thickness of the movable clamping plate is d, and D is greater than d.

[0007] In an embodiment of the utility model, the two mounting pins are respectively a first pin and a second pin, the first pin is arranged on the balance arm, the second pin is arranged on the lifting arm, the first pin is provided with two limiting holes, and the two limiting holes are arranged sequentially along the axial direction of the first pin.

[0008] In an embodiment of the utility model, the anti-slip limit member is a limit pin, the limit hole is a through hole, the anti-slip limit member can pass through the limit hole, and the anti-slip limit member is radially provided with a locking hole for the locking pin to pass through, and the locking pin is used to lock the limit pin to the mounting pin.

[0009] In an embodiment of the utility model, the arm support connection structure further comprises an in-place sensor installed on the arm support assembly, and the in-place sensor is arranged corresponding to the mounting pin and is used to detect the movable clamping plate.

[0010] In an embodiment of the utility model, in-place sensors are installed on both the lifting arm and the balancing arm, and the in-place sensors are used to abut against the movable clamping plate.

[0011] In an embodiment of the utility model, the mounting hole and the mounting pin are clearance-matched; and / or the movable clamping plate is a flat plate.

[0012] In an embodiment of the utility model, the movable clamping plate includes a rectangular portion and arc-shaped portions connected to both ends of the rectangular portion in the length direction.

[0013] In an embodiment of the utility model, one of the mounting pins is welded to the lifting arm, and another of the mounting pins is welded to the balancing arm.

[0014] The utility model also provides a crane, characterized in that the crane comprises the boom connection structure as described above.

[0015] Through the above technical solution, the arm support connection structure provided by the embodiment of the utility model has the following beneficial effects:

[0016] In the utility model, a mounting pin is fixedly provided on the balance arm, and a mounting pin is fixedly provided on the lifting arm, and two mounting holes on the movable clamping plate can be respectively correspondingly inserted into the two mounting pins. When installing the lifting arm, the limit between the movable clamping plate and the mounting pin on the balance arm can be first released by the anti-slip limiter, so that the movable clamping plate can move along the axial direction of the mounting pin, and then the movable clamping plate is pushed inwardly and buckled into the mounting pin on the lifting arm, so that the mounting pin on the lifting arm passes through the mounting hole on the movable clamping plate. After adjusting the movable clamping plate to a preset position, the movable clamping plate can be detachably connected with the mounting pin through the anti-slip limiter, and the movable clamping plate can be limited to the mounting pin. The two mounting pins can be detachably connected with the anti-slip limiter, so that the two ends of the movable clamping plate are respectively limited to the balance arm and the lifting arm. When dismantling the lifting arm, the anti-slip limiter on the lifting arm and the side anti-slip limiter on the balance arm are first removed, and then the movable clamping plate is withdrawn from the mounting pin outward, and the arm dismantling is completed. The boom connection structure in the utility model connects the balancing arm and the lifting arm through a movable clamping plate, omitting the matching structure of the male and female joints in the prior art, and the balancing arm and the lifting arm can be assembled and disassembled only by the installation pin penetrating the installation hole and being detachably connected with the anti-dropping limit piece. The utility model is convenient to install, and the operation of violently inserting and pulling out the pin when assembling and disassembling the lifting arm is omitted. The utility model is easy to operate, and the structural requirement of the male and female joints exposed on the pin shaft is not required. The installation space requirement is low, and quick assembly and disassembly can be achieved, with high assembly and disassembly efficiency.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of the arm support connection structure according to one embodiment of the utility model;

[0020] Figure 2 It is a partial structural schematic diagram of the arm support connection structure in one embodiment of the utility model at a viewing angle;

[0021] Figure 3 It is a partial structural schematic diagram of the arm support connection structure in another viewing angle according to one embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the balance arm structure of the arm support connection structure according to one embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of a lifting arm according to the arm support connection structure in one embodiment of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the arm support connection structure in one state according to one embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the arm support connection structure in another state according to one embodiment of the utility model.

[0026] Description of Reference Numerals

[0027] Label Name Label Name

[0028] 100 Arm connection structure 41 Mounting hole

[0029] 1 Balance arm 42 Rectangular portion

[0030] 2 Lifting arm 43 arc part

[0031] 3 Mounting pin 5 Anti-drop limiter

[0032] 3a First pin 6 Locking pin

[0033] 3b 2nd pin 7 In-position sensor

[0034] 4 movable pallet DETAILED DESCRIPTION

[0035] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] The boom connection structure according to the present utility model is described below with reference to the accompanying drawings.

[0037] like Figures 1 to 6 As shown, in an embodiment of the utility model, the boom connecting structure 100 includes a boom assembly, a movable clamping plate 4 and an anti-slip limit member 5, the boom assembly includes a balance arm 1 and a lifting arm 2, the outer side walls of the balance arm 1 and the outer side walls of the lifting arm 2 are both provided with mounting pins 3, and the mounting pins 3 extend along the arm width direction of the boom assembly shown; the movable clamping plate 4 is provided with two mounting holes 41, and the two mounting pins 3 are used to respectively pass through the two mounting holes 41; the anti-slip limit member 5 and the mounting pin 3 are detachably connected and used to limit the movable clamping plate 4 on the mounting pin 3.

[0038] It can be understood that the arm width direction is the left-right direction, and the arm length direction is the front-back direction. For the convenience of transportation and connection, when the balance arm 1 and the lifting arm 2 are not connected, the movable clamping plate 4, the balance arm 1 and the anti-drop limiter 5 are clamped, and the movable clamping plate 4 can be movably limited on the mounting pin 3 on the balance arm 1, and the mounting pin 3 and the mounting hole 41 are clearance-matched. When it is necessary to connect the movable clamping plate 4 and the lifting arm 2, the limit of the movable clamping plate 4 can be released, and the movable clamping plate 4 can be rotated to a position matching with another mounting pin 3, and the two ends of the movable clamping plate 4 are respectively connected to the two mounting pins 3.

[0039] In this embodiment, a mounting pin 3 is fixedly provided on the balance arm 1, and a mounting pin 3 is fixedly provided on the boom 2, and two mounting holes 41 on the movable clamping plate 4 can respectively be correspondingly inserted into the two mounting pins 3. When installing the boom 2, the limit between the movable clamping plate 4 and the mounting pin 3 on the balance arm 1 can be released by the anti-drop limiter 5, so that the movable clamping plate 4 can move along the axial direction of the mounting pin 3, and then the movable clamping plate 4 is pushed inwardly into the mounting pin 3 on the boom 2, so that the mounting pin 3 on the boom 2 passes through the mounting hole 41 on the movable clamping plate 4, and after adjusting the movable clamping plate 4 to a preset position, the movable clamping plate 4 can be detachably connected with the mounting pin 3 by the anti-drop limiter 5, and the two mounting pins 3 can be detachably connected with the anti-drop limiter 5, so that the two ends of the movable clamping plate 4 are respectively limited to the balance arm 1 and the boom 2. When dismantling the boom 2, first remove the anti-slip limiter 5 on the boom 2 and the side anti-slip limiter 5 on the balance arm 1, then withdraw the movable clamping plate 4 outward from the mounting pin 3, and the arm dismantling is completed. The arm support connection structure 100 in this embodiment connects the balance arm 1 and the boom 2 through a movable clamping plate 4, omitting the matching structure of the male and female joints in the prior art. Only by passing the mounting pin 3 through the mounting hole 41 and detachably connecting with the anti-slip limiter 5, the balance arm 1 and the boom 2 can be disassembled and assembled. The installation is convenient, and the operation of violently inserting and pulling the pin when assembling and disassembling the boom 2 is omitted. It is easy to operate, and there is no need for the structural requirement of the male and female joints exposed on the pin shaft. The installation space requirement is low, and quick disassembly and assembly can be achieved, and the disassembly and assembly efficiency is high.

[0040] like Figure 2 and Figure 3 As shown, the mounting pin 3 is provided with a limit hole for inserting the anti-slip limiter 5 in the radial direction, the distance between the limit hole and the fixed end of the mounting pin 3 is D, the thickness of the movable clamping plate 4 is d, and D is greater than d. In this embodiment, the movable clamping plate 4 and the anti-slip limiter 5 are clearance-matched, the movable clamping plate 4 extends in the front-to-back direction, and the anti-slip limiter 5 can be inserted into the limit hole in the up-down direction. When the movable clamping plate 4 moves in the left-right direction relative to the mounting pin 3, the anti-slip limiter 5 located on the outside of the movable clamping plate 4 can abut against the movable clamping plate 4 to prevent the movable clamping plate 4 from being separated from the mounting pin 3. In this embodiment, the anti-slip limiter 5 and the mounting pin 3 are connected by plug-in, which is convenient for installation and disassembly, and the clearance between the anti-slip limiter 5 and the movable clamping plate 4 can reserve a certain amount of activity margin for the movable clamping plate 4 to avoid the situation where the operation of other components is affected by the jamming of the movable clamping plate 4.

[0041] In one embodiment, the two mounting pins 3 are respectively a first pin 3a and a second pin 3b. The first pin 3a is arranged on the balance arm 1, and the second pin 3b is arranged on the lifting arm 2. The first pin 3a is provided with two limiting holes, and the two limiting holes are arranged in sequence along the axial direction of the first pin 3a. In this embodiment, the first pin 3a is fixedly connected to the balance arm 1, and the second pin 3b is fixedly connected to the lifting arm 2. In this embodiment, the second pin 3b may be provided with a limiting hole, and the first pin 3a is provided with two limiting holes, and the two limiting holes are arranged at intervals along the left and right directions. The limiting hole located on the outside can prevent the movable clamping plate 4 from falling off, and the limiting hole located on the inside can realize the movable clamping plate 4 to be fastened and lifted after the mounting pin 3 is installed.

[0042] like Figure 6 and Figure 7 As shown, the anti-slip limiter 5 is a limit pin, the limit hole is a through hole, the anti-slip limiter 5 can pass through the limit hole, and the anti-slip limiter 5 is provided with a locking hole for the locking pin 6 to pass through in the radial direction, and the locking pin 6 is used to lock the limit pin to the mounting pin 3. The locking hole in this embodiment extends in the front-to-back direction and is located at the bottom of the anti-slip limiter 5. After the movable clamping plate 4 passes through the two mounting pins 3 and the anti-slip limiter 5 passes through the limit hole, the locking pin 6 can pass through the locking hole. The locking pin 6 in this embodiment can be a spring pin or a cotter pin. The locking pin 6 can prevent the anti-slip limiter 5 from escaping upward from the limit hole, thereby improving the applicability and stability of the arm support connection structure 100.

[0043] Specifically, the boom connection structure 100 also includes an in-place sensor 7 installed on the boom assembly, and the in-place sensor 7 is set corresponding to the installation pin 3 and is used to detect the movable card plate 4. The in-place sensor 7 in this embodiment can be connected to the sound and light display on the crane or the display screen in the cab. When installing the boom 2, the movable card plate 4 is pushed inward to make the installation pin 3 pass through the installation hole 41. The in-place sensor 7 can detect the movable card plate 4, and the in-place sensor 7 can feedback to the operator that the movable card plate 4 is in place. When disassembling the boom 2, the movable card plate 4 is pushed outward, and the in-place sensor 7 can detect the movable card plate 4. The in-place sensor 7 can feedback to the operator that the movable card plate 4 has been removed. In this embodiment, by setting the in-place sensor 7, the operator can more intuitively obtain whether the removal and assembly of the movable card plate 4 are in place, thereby improving the convenience of disassembly and assembly of the boom connection structure 100.

[0044] In one embodiment, both the boom 2 and the balance arm 1 are equipped with in-position sensors 7, which are used to abut against the movable card plate 4. The in-position sensors 7 in this embodiment are located on the left and right sides of the mounting pin 3. The in-position sensors 7 are contact sensors and are provided with elastic contacts that abut against the movable card plate 4. The elastic contacts in this embodiment extend in the front-to-back direction, and the distance between the elastic contacts and the boom 2 is less than the length of the mounting pin 3, which can facilitate the detection of the movable card plate 4. In this embodiment, two in-position sensors 7 are used to detect the front and rear sides of the movable card plate 4 respectively, which can improve the detection accuracy of the in-position sensors 7.

[0045] It can be understood that the mounting hole 41 and the mounting pin 3 are clearance-matched, which can facilitate the mounting pin 3 to pass through the two mounting holes 41 of the movable clamping plate 4; and the movable clamping plate 4 is a flat plate. In this embodiment, the movable clamping plate 4 is a flat plate, which can facilitate the matching between the movable clamping plate 4 and the balance arm 1 and the lifting arm 2.

[0046] like Figure 6 As shown, the movable clamping plate 4 includes a rectangular portion 42 and arcuate portions 43 connected to both ends of the length direction of the rectangular portion 42. The rectangular portion 42 in this embodiment is located in the middle, and the arcuate portion 43 is connected to the front and rear ends of the rectangular portion 42. Through the cooperation of the rectangular portion 42 and the arcuate portion 43, the stress concentration of the movable clamping plate 4 can be avoided. At the same time, the movable clamping plate 4 in this embodiment has a simple structure and is convenient for production and processing.

[0047] The utility model also provides a crane, which includes the above boom connection structure 100. The specific structure of the boom connection structure 100 refers to the above embodiment. Since the crane adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0048] In the embodiment of the utility model, one of the mounting pins 3 is welded to the boom 2, and the other mounting pin 3 is welded to the balance arm 1. The two mounting pins 3 in the embodiment are respectively fixed to the boom 2 and the balance arm 1 by welding, which can avoid the assembly process between the mounting pins 3 and the boom 2 and the balance arm 1, and can also improve the structural stability of the boom connection structure 100, avoid the situation where the mounting pins 3 fall off, and can also improve the connection strength between the mounting pins 3 and the movable clamping plate 4.

[0049] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A boom connection structure (100), characterized in that: The arm support connection structure (100) comprises: A boom assembly comprises a balancing arm (1) and a lifting arm (2), wherein the outer side wall of the balancing arm (1) and the outer side wall of the lifting arm (2) are both provided with mounting pins (3), and the mounting pins (3) extend along the arm width direction of the boom assembly; The movable clamping plate (4) is provided with two mounting holes (41), and the two mounting pins (3) are used to respectively pass through the two mounting holes (41); The anti-dropping limiting member (5) is detachably connected to the mounting pin (3) and is used to limit the movable clamping plate (4) on the mounting pin (3).

2. The boom connection structure according to claim 1, characterized in that: The mounting pin (3) is provided with a limiting hole in the radial direction for inserting the anti-dropping limiting member (5), the distance between the limiting hole and the fixed end of the mounting pin (3) is D, the thickness of the movable clamping plate (4) is d, and D is greater than d.

3. The boom connection structure according to claim 2, characterized in that: The two mounting pins (3) are respectively a first pin (3a) and a second pin (3b); the first pin (3a) is arranged on the balancing arm (1), and the second pin (3b) is arranged on the lifting arm (2); the first pin (3a) is provided with two limiting holes, and the two limiting holes are arranged in sequence along the axial direction of the first pin (3a).

4. The boom connection structure according to claim 2, characterized in that: The anti-slip limit piece (5) is a limit pin, the limit hole is a through hole, the anti-slip limit piece (5) can pass through the limit hole, and the anti-slip limit piece (5) is radially provided with a locking hole for a locking pin (6) to pass through, and the locking pin (6) is used to lock the limit pin to the mounting pin (3).

5. The boom connection structure according to any one of claims 1 to 4, characterized in that: The arm support connection structure (100) further comprises an in-position sensor (7) mounted on the arm support assembly, wherein the in-position sensor (7) is arranged corresponding to the mounting pin (3) and is used to detect the movable clamping plate (4).

6. The boom connection structure according to claim 5, characterized in that: The lifting arm (2) and the balancing arm (1) are both provided with in-position sensors (7), and the in-position sensors (7) are used to abut against the movable clamping plate (4).

7. The boom connection structure according to any one of claims 1 to 4, characterized in that: The mounting hole (41) and the mounting pin (3) are clearance-matched; and / or, The movable clamping plate (4) is a flat plate.

8. The boom connection structure according to any one of claims 1 to 4, characterized in that: The movable clamping plate (4) comprises a rectangular portion (42) and arc-shaped portions (43) connected to both ends of the rectangular portion (42) in the length direction.

9. The boom connection structure according to any one of claims 1 to 4, characterized in that: One of the mounting pins (3) is welded to the lifting arm (2), and the other of the mounting pins (3) is welded to the balancing arm (1).

10. A crane, characterized in that: The crane comprises the boom connection structure (100) according to any one of claims 1 to 9.

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