Amplitude-variable arm, adjustable fly jib and hoisting equipment

Abstract

The utility model relates to the field of hoisting mechanical equipment, and discloses a variable-amplitude arm, an adjustable auxiliary arm and hoisting equipment. The variable-amplitude arm comprises a frame body and a coaming assembly, the frame body comprises a first web plate, a second web plate, a first pipe body and a second pipe body, the first web plate and the second web plate are arranged in an aligned mode, the first pipe body and the second pipe body are arranged between the first web plate and the second web plate and connected with the first web plate and the second web plate, and a hinge hole is formed in the first pipe body; a hoisting hole is formed in the second pipe body; the surrounding plate assembly is arranged around the frame body and connected with the first web plate and the second web plate. The variable-amplitude arm disclosed by the utility model is high in overall structural strength, and the variable-amplitude arm applied to the hoisting equipment can bear larger hoisting load so as to improve the hoisting capacity of the hoisting equipment.

Description

Technical Field

[0001] The present application belongs to the field of lifting machinery and equipment, and specifically relates to a luffing arm, an adjustable jib and lifting equipment. Background Art

[0002] A truck-mounted crane is a device that uses a hydraulic lifting and telescoping system to lift, rotate, and transport cargo. It's typically mounted on a truck. The front end of a truck-mounted crane's jib is typically equipped with an adjustable luffing mechanism to enhance the boom's operational flexibility.

[0003] However, the limited structural strength of existing jibs restricts the lifting capacity of truck-mounted cranes. Utility Model Content

[0004] The purpose of the present application is to provide a luffing arm, an adjustable jib and a lifting equipment to solve the problem of limited lifting capacity of existing lifting equipment.

[0005] To achieve the above objectives, the present application provides a first aspect of a luffing arm, the luffing arm comprising:

[0006] A frame body having a hanging hole and at least one hinge hole, the frame body comprising a first web, a second web, a first tube, and a second tube, the first web and the second web being arranged in opposite positions, the first tube and the second tube being disposed between the first web and the second web and connected to the first web and the second web, the first tube forming a hinge hole, and the second tube forming a hanging hole; and

[0007] The enclosure assembly is arranged around the four sides of the frame body and is connected to the first web plate and the second web plate.

[0008] In some embodiments, the luffing arm further includes a reinforcement ring, and each of the two ends of each first tube is correspondingly provided with a reinforcement ring, the reinforcement ring is located on a side opposite to the first web and the second web, and the reinforcement ring is connected to the corresponding first web or second web;

[0009] And / or, ribs are provided on the circumferential walls at both ends of the first tube body, and the ribs extend along the radial direction of the first tube body and are connected to the corresponding first web or second web.

[0010] In some embodiments, the hinge holes and the hanging holes are distributed along the length direction of the frame body, and the cross-sectional area of ​​the frame body near the hinge holes is larger than the cross-sectional area of ​​the frame body near the hanging holes.

[0011] In some embodiments, the luffing arm includes at least two first tubes;

[0012] The enclosure assembly includes a first cover plate, a second cover plate and a sealing plate. The first cover plate and the second cover plate are arranged in parallel along the height direction of the frame body. The sealing plate is located at one end of the frame body close to the hinge hole and is respectively connected to the first web plate, the second web plate and the two first tube bodies.

[0013] In some embodiments, a self-lubricating copper sleeve is provided in each of the lifting hole and / or the hinge hole.

[0014] A second aspect of the present application provides an adjustable jib, the adjustable jib comprising:

[0015] Fixed arm;

[0016] hinge assembly; and

[0017] The luffing arm is hingedly connected to the fixed arm via a hinge assembly;

[0018] Wherein, the hinge assembly includes a connecting pin shaft and a spring pin, and the spring pin is inserted into the pin mounting hole of the connecting pin shaft.

[0019] In some embodiments, the fixation arm comprises:

[0020] arm cylinder; and

[0021] The articulated seat comprises a box body and an articulated portion. The box body is connected to the end of the arm cylinder, and the articulated portion is articulatedly connected to the luffing arm through an articulated assembly.

[0022] In some embodiments, the axial cross-section of the arm cylinder is polygonal.

[0023] In some embodiments, a tail sealing plate is further provided at one end of the arm cylinder away from the hinge seat, and the outer periphery of the tail sealing plate is connected to the inner wall of the arm cylinder.

[0024] A third aspect of the present application protects a lifting device, which includes the above-mentioned adjustable jib.

[0025] Through the above technical solution, the luffing arm provided in the embodiment of the present application has the following beneficial effects:

[0026] In the technical solution of this application, the luffing arm is constructed by a frame body composed of a first web, a second web, a first tube, and a second tube to strengthen the structure of the luffing arm. The longitudinal bending resistance of the luffing arm is strengthened by the aligned first and second webs, and the lateral tensile resistance of the luffing arm is improved by providing a panel assembly connecting the first and second webs. As a result, compared to luffing arms in the prior art, the structural strength of the luffing arm provided by this application is greatly improved. When used in lifting equipment, the luffing arm can bear a larger load, thereby improving the lifting capacity of the lifting equipment.

[0027] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the drawings:

[0029] Figure 1 This is an axonometric diagram of a luffing arm with a hidden cover plate provided according to a specific embodiment of the present application;

[0030] Figure 2 for Figure 1 The luffing arm in the figure shows an axonometric view after the plate is closed;

[0031] Figure 3 for Figure 2 A cross-sectional view of the luffing arm in FIG.

[0032] Figure 4 A front view of an adjustable auxiliary arm provided according to a specific embodiment of the present application;

[0033] Figure 5 for Figure 4 Axonometric view of the adjustable jib in;

[0034] Figure 6 for Figure 4 A front view of the fixed arm of the adjustable jib;

[0035] Figure 7 for Figure 6 Axonometric drawing of the fixed arm in;

[0036] Figure 8 for Figure 6 A cross-sectional view of the local structure of the front end of the fixed arm;

[0037] Figure 9 for Figure 6 A schematic diagram of the local structure of the rear end of the fixed arm;

[0038] Figure 10 It is a schematic diagram of the partial structure of a connecting pin provided according to a specific embodiment of the present application.

[0039] Description of Reference Numerals

[0040] S Frame body C Articulated seat

[0041] F hinge hole H lifting hole

[0042] W Self-lubricating copper sleeve I Mounting hole

[0043] 100 fixed arm 111 first vertical plate

[0044] 112 second vertical plate 113 hollow portion

[0045] 114 plug welding hole 121 first horizontal pull plate

[0046] 122 Second horizontal pull plate 130 Front cover plate

[0047] 140 Arm cylinder 141 Tail sealing plate

[0048] 142 Arm positioning hole 143 Slider

[0049] 200 luffing arm 211 first web

[0050] 212 Second web 220 First tube body

[0051] 230 second tube 241 first cover

[0052] 242 second cover plate 260 sealing plate

[0053] 270 reinforcement ring 280 rib plate

[0054] 300 hinge assembly 310 step

[0055] 320 Pin mounting hole 300a Connecting pin DETAILED DESCRIPTION

[0056] The following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0057] The luffing jib, adjustable jib and lifting equipment according to the present application are described below with reference to the accompanying drawings.

[0058] Example 1

[0059] This embodiment provides a new type of luffing arm, such as Figures 1 to 3 As shown, a luffing arm 200 in a specific embodiment includes a frame body S and a panel assembly. The frame body S has a hoisting hole H and at least one hinge hole F.

[0060] The frame body S includes a first web 211, a second web 212, a first tube body 220 and a second tube body 230. The first web 211 and the second web 212 are arranged in correspondence. The first tube body 220 and the second tube body 230 are both arranged between the first web 211 and the second web 212 and are both connected to the first web 211 and the second web 212. The first tube body 220 forms a hinge hole F, and the second tube body 230 forms a lifting hole H.

[0061] The enclosure assembly is arranged around the periphery of the frame body S and is connected to the first web 211 and the second web 212 .

[0062] Specifically, if Figure 1 As shown, the vertically arranged first web 211 and second web 212 are spaced apart from each other. The lumen of the transversely arranged first tube 220 forms a hinge hole F. One end of each of the two first tubes 220, spaced apart vertically, is welded to the rear end of the first web 211, and the other end is welded to the rear end of the second web 212. The lumen of the transversely arranged second tube 230 forms a lifting hole H for hoisting. One end of the second tube 230 is welded to the front end of the first web 211, and the other end is welded to the front end of the second web 212. In this way, the first web 211, second web 212, first tube 220, and second tube 230 form a frame body S. Frame body S has a simple structure and high structural strength. The first web 211 and second web 212, which have a larger moment of inertia, can jointly bear longitudinal bending moments. Furthermore, the enclosure assembly connecting the first web 211 and second web 212 can enhance the transverse tensile strength of frame body S. Therefore, compared with the luffing arm 200 in the prior art, the strength of the luffing arm 200 of the present application is greatly improved.

[0063] In this embodiment, if Figures 1 to 3 As shown, the luffing arm 200 also includes a reinforcement ring 270. A reinforcement ring 270 is arranged at both ends of each first tube body 220. The reinforcement ring 270 is located on the side opposite to the first web 211 and the second web 212. The reinforcement ring 270 is connected to the corresponding first web 211 or second web 212.

[0064] like Figure 3 As shown, a reinforcement ring 270 is sleeved around the end of the first tube 220 and is welded to the first web 211 or the second web 212 to strengthen the local structural strength of the connection between the first tube 220 and the first web 211 or the second web 212. The first web 211 or the second web 212 and the corresponding reinforcement ring 270 are not limited to the above-mentioned welded connection and can also be integrally formed.

[0065] In this embodiment, if Figure 1 and Figure 3As shown, ribs 280 are provided on the circumferential walls of both ends of the first tube body 220 . The ribs 280 extend along the radial direction of the first tube body 220 and are connected to the corresponding first web 211 or second web 212 .

[0066] Specifically, the first tube 220 is provided with a plurality of ribs 280, which are spaced apart along the circumference of the first tube 220. One end of the ribs 280 is welded to the circumference of the first tube 220, and the other end extends radially along the first tube 220 and is welded to the corresponding first web 211 or second web 212. This significantly enhances the structural strength of the luffing arm 200 at the hinge hole F, further improving the overall structural strength of the luffing arm 200. The first tube 220 and the corresponding ribs 280 are not limited to the welded connection described above, but can also be integrally formed.

[0067] In this embodiment, if Figures 1 to 3 As shown, the hinge hole F and the lifting hole H are distributed along the length direction of the frame body S, and the cross-sectional area of ​​the frame body S near the hinge hole F is larger than the cross-sectional area of ​​the frame body S near the lifting hole H.

[0068] like Figure 1 As shown, in this way, the overall weight can be reduced while ensuring the rigidity of the root of the variable amplitude arm 200, thereby reducing costs and facilitating transportation.

[0069] In some embodiments, the heights of the first web 211 and the second web 212 are gradually increased along the length direction of the webs, so as to further increase the structural reliability of the luffing arm 200 .

[0070] like Figures 1 to 3 As shown, the luffing arm 200 includes at least two first tubes 220 to form at least two hinge holes F. In order to more clearly describe the technical solution of the present application, this embodiment is illustrated by taking the luffing arm 200 including two first tubes 220 as an example.

[0071] like Figure 2 and Figure 3 As shown, the enclosure assembly includes a first cover plate 241, a second cover plate 242 and a sealing plate 260. The first cover plate 241 and the second cover plate 242 are arranged in alignment along the height direction of the frame body S. The sealing plate 260 is located at one end of the frame body S close to the hinge hole F and is respectively connected to the first web 211, the second web 212 and the two first tube bodies 220.

[0072] like Figure 3As shown, the number of the first tube bodies 220 is two. As an example, two hinge assemblies 300 (such as locking pins) can be used to horizontally penetrate the first tube body 220 to fix the variable amplitude arm 200. In addition, the first tube body 220 also greatly improves the moment of inertia of the variable amplitude arm 200 in the lateral direction, that is, increases the lateral bending resistance of the variable amplitude arm 200. On this basis, the lateral sides of the first cover plate 241 and the lateral sides of the second cover plate 242 are respectively welded to the first web 211 and the second web 212, and the front and rear sides of the first cover plate 241 and the front and rear sides of the second cover plate 242 are respectively welded to the first tube body 220 and the second tube body 230, and are welded to the first tube body 220 and the second tube body 230 through the upper and lower sides of the sealing plate 260, and the left and right sides are welded to the first web 211 and the second web 212, so that the variable amplitude arm 200 forms a closed frame structure, further improving the overall structural strength.

[0073] In this embodiment, if Figure 1 As shown, the hoisting hole H and / or the hinge hole F are respectively provided with a self-lubricating copper sleeve W.

[0074] Specifically, the self-lubricating copper sleeve W is provided between the second tube 230 and the hanging assembly (not shown) inserted into the hanging hole H. The self-lubricating copper sleeve W can reduce friction between the hanging assembly and the second tube 230, allowing the hanging assembly to pivot to a certain extent in the hanging hole H, thereby improving the flexibility of the hanging assembly and reducing wear between the hanging assembly and the second tube 230. As an example, the self-lubricating copper sleeve W can also be provided between the first tube 220 and the hinge assembly 300 inserted into the hinge hole F.

[0075] like Figures 4 to 10 As shown, this embodiment also provides an adjustable jib. The adjustable jib includes a fixed arm 100, a hinge assembly 300 and a luffing arm 200. The luffing arm 200 is hingedly connected to the fixed arm 100 through the hinge assembly 300. The hinge assembly 300 includes a connecting pin 300a and a spring pin (not shown in the figure). The spring pin is inserted into the pin mounting hole 320 of the connecting pin 300a. The luffing arm 200 adopts the solution provided in the above-mentioned embodiment 1, which will not be described in detail here. Obviously, the adjustable jib also has all the technical effects of the above-mentioned luffing arm 200, so it will not be described in detail here.

[0076] Example 2

[0077] This embodiment provides an adjustable auxiliary arm, such as Figures 4 to 10 As shown, an adjustable jib in a specific embodiment includes a fixed arm 100, an articulated assembly 300, and a luffing arm 200. The luffing arm 200 is hingedly connected to the fixed arm 100 via the articulated assembly 300. The luffing arm 200 adopts the solution provided in the above-mentioned embodiment 1, and no further description is given here.

[0078] Specifically, if Figure 4 As shown, the hinge assembly 300 can be selectively connected between the hinge hole F of the variable arm 200 and the mounting hole I arranged in alignment on the fixed arm 100, thereby changing the installation angle of the variable arm 200 and increasing the flexibility and application scenarios of the variable arm 200.

[0079] Among them, Figure 10 As shown, one end of the connecting pin 300a is provided with a step 310 for contact with the fixed arm 100, and the other end is provided with a pin mounting hole 320. Inserting the spring pin into the pin mounting hole 320 prevents the hinge assembly 300 from moving out of its installed position. This not only facilitates the quick disassembly of the luffing arm 200 and the fixed arm 100, but also ensures a secure hinge connection between them. Obviously, this adjustable jib also possesses all the technical advantages of the luffing arm 200 described above, so these will not be elaborated upon here.

[0080] Furthermore, in this embodiment, if Figures 6 to 8 As shown, the fixed arm 100 includes an arm cylinder 140 and an articulated seat C. The articulated seat C includes a box portion and an articulated portion, the box portion is connected to the end of the arm cylinder 140 , and the articulated portion is articulated to the luffing arm 200 via an articulated assembly 300 .

[0081] Specifically, the box body includes a first vertical plate 111, a second vertical plate 112, a first horizontal pull plate 121, a second horizontal pull plate 122 and a front cover plate 130. The first vertical plate 111 and the second vertical plate 112 are arranged in opposition. The first horizontal pull plate 121 and the second horizontal pull plate 122 are both arranged between the first vertical plate 111 and the second vertical plate 112 and are both welded to the first and second vertical plates 112. The front cover plate 130 is arranged between the first vertical plate 111 and the second vertical plate 112 and are both welded to the first vertical plate 111 and the second vertical plate 112. The front cover plate 130 is arranged between the first horizontal pull plate 121 and the second horizontal pull plate 122 and is welded to the first and second horizontal pull plates 121 and 122. The stress in the middle of the first and second vertical plates 111, 112 is low, so a hollow portion 113 can be formed, thereby improving material utilization. Welding holes 114 are also provided on the first and second vertical plates 111, 112, adjacent to the connection with the arm cylinder 140, thereby conveniently improving the weld strength between the box and the arm cylinder 140. Because the box and the luffing boom 200 both have high structural strength, the overall structural strength after the two are articulated is also high, allowing the adjustable jib to be used for large-tonnage loads at a low cost.

[0082] In some embodiments, the heights of the first vertical plate 111 and the second vertical plate 112 are both trapezoidal plates that gradually increase along the length direction of the vertical plates, so as to further increase the structural reliability of the box body.

[0083] In this embodiment, if Figure 9 As shown, the axial cross-section of the arm cylinder 140 is polygonal.

[0084] For example, the cross section of the arm cylinder body 140 is a dodecagonal cross section. In this way, the rigidity and strength of the arm cylinder body 140 can be improved. Of course, the axial cross section of the arm cylinder body 140 is not limited to the above-mentioned dodecagonal cross section, and can also be other polygonal structures.

[0085] In this embodiment, if Figure 9 As shown, a tail sealing plate 141 is further provided at one end of the arm cylinder body 140 away from the hinge seat C, and the outer periphery of the tail sealing plate 141 is connected to the inner wall of the arm cylinder body 140 .

[0086] A tail sealing plate 141 is provided at the rear end of the arm cylinder body 140 , and a hollow opening is formed in the middle of the tail sealing plate 141 , thereby further improving the structural strength and material utilization rate of the arm cylinder body 140 .

[0087] Example 3

[0088] This embodiment provides a lifting device, such as Figures 1 to 10 As shown, a lifting device in a specific embodiment includes the adjustable jib provided in the above-mentioned embodiment 1 or embodiment 2.

[0089] The lifting equipment includes a mounting arm (not shown), and the arm cylinder 140 is inserted into the mounting arm with an adjustable extension length. Figure 6 As shown, the arm barrel 140 includes a plurality of arm positioning holes 142 arranged at intervals in the transverse direction. The arm positioning holes 142 and the limiting holes of the mounting arm can be selectively connected by a fixed locking pin, thereby adjusting the extension length of the arm barrel 140 relative to the mounting arm. The arm positioning holes 142 are waist-shaped holes extending up and down, thereby reducing the influence of processing errors and assembly errors on the assembly of the fixed arm 100 and the mounting arm. The rear end of the arm barrel 140 is also provided with a plurality of sliders 143 arranged at intervals along the circumferential direction of the arm barrel 140. The sliders 143 are used to be cushioned between the outer peripheral wall of the arm barrel 140 and the inner wall of the mounting arm to ensure that when the fixed arm 100 is assembled on the mounting arm, the force on the arm barrel 140 is uniform.

[0090] Obviously, this lifting equipment also has all the technical effects of the above-mentioned adjustable jib, so it will not be described here in detail.

[0091] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0092] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present application. 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

Claims

1. A luffing arm, characterized in that: The luffing arm (200) comprises: A frame body (S) having a hanging hole (H) and at least one hinge hole (F), the frame body (S) comprising a first web (211), a second web (212), a first tube (220) and a second tube (230), the first web (211) and the second web (212) being arranged in a symmetrical manner, the first tube (220) and the second tube (230) being both arranged between the first web (211) and the second web (212) and connected to the first web (211) and the second web (212), the first tube (220) forming the hinge hole (F), and the second tube (230) forming the hanging hole (H); and A panel assembly is arranged around the four sides of the frame body (S) and is connected to the first web (211) and the second web (212).

2. The luffing arm according to claim 1, characterized in that: The luffing arm (200) further includes a reinforcement ring (270), and the reinforcement ring (270) is correspondingly arranged at both ends of each first tube body (220), and the reinforcement ring (270) is located on a side opposite to the first web (211) and the second web (212), and the reinforcement ring (270) is connected to the corresponding first web (211) or the second web (212); And / or, ribs (280) are provided on the circumferential walls at both ends of the first tube body (220), and the ribs (280) extend along the radial direction of the first tube body (220) and are connected to the corresponding first web (211) or the second web (212).

3. The luffing arm according to claim 1, characterized in that: The hinge hole (F) and the lifting hole (H) are distributed along the length direction of the frame body (S), and the cross-sectional area of ​​the frame body (S) near the hinge hole (F) is larger than the cross-sectional area of ​​the frame body (S) near the lifting hole (H).

4. The luffing arm according to any one of claims 1 to 3, characterized in that: The luffing arm (200) includes at least two first tubes (220); The enclosure assembly includes a first cover plate (241), a second cover plate (242) and a sealing plate (260), wherein the first cover plate (241) and the second cover plate (242) are arranged in a symmetrical manner along the height direction of the frame body (S), and the sealing plate (260) is located at one end of the frame body (S) close to the hinge hole (F) and is respectively connected to the first web (211), the second web (212) and the two first tube bodies (220).

5. The luffing arm according to claim 1, characterized in that: A self-lubricating copper sleeve (W) is respectively provided in the hoisting hole (H) and / or the hinge hole (F).

6. An adjustable jib, characterized in that: The adjustable jib comprises: Fixed arm (100); a hinge assembly (300); and According to the luffing arm (200) according to any one of claims 1 to 5, the luffing arm (200) is hingedly connected to the fixed arm (100) via the hinge assembly (300); Wherein, the hinge assembly (300) comprises a connecting pin shaft (300a) and a spring pin, and the spring pin is inserted into a pin mounting hole (320) of the connecting pin shaft (300a).

7. The adjustable jib according to claim 6, characterized in that: The fixed arm (100) comprises: an arm cylinder (140); and An articulated seat (C), the articulated seat (C) comprises a box body portion and an articulated portion, the box body portion is connected to the end of the arm cylinder (140), and the articulated portion is articulatedly connected to the variable amplitude arm (200) via the articulated assembly (300).

8. The adjustable jib according to claim 7, characterized in that: The axial cross section of the arm cylinder (140) is polygonal.

9. The adjustable jib according to claim 7, characterized in that: A tail sealing plate (141) is further provided at one end of the arm cylinder (140) away from the hinge seat (C), and the outer periphery of the tail sealing plate (141) is connected to the inner wall of the arm cylinder (140).

10. A lifting equipment, characterized in that: The lifting equipment comprises an adjustable jib according to any one of claims 6 to 9.

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