Crane boom and hoisting machinery
By installing a support component inside the third section of the boom, the vibration and impact problems caused by the stepped structure of the telescopic cylinder were solved, achieving smooth sliding of the cylinder and extending its service life.
Patent Information
- Application Number
- CN202522334458.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-11-04
AI Technical Summary
During the extension and retraction of the boom of an existing truck-mounted crane, the lower surface of the inner wall of each telescopic boom section has a stepped structure, which causes the telescopic cylinder to bounce, easily damaging the telescopic cylinder.
A support is installed inside the third section of the boom to support the drive section of the telescopic cylinder after the guide bracket detaches from the last section of the boom, thus avoiding shaking and impact caused by going up and down steps and ensuring smooth sliding of the cylinder.
The support components prevent vibration and impact caused by the stepped surface during the extension and retraction of the telescopic cylinder, thus improving its service life and operational stability.
Smart Images
Figure CN223659696U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engineering machinery technology, specifically to a crane boom and lifting machinery. Background Technology
[0002] In the field of construction machinery, lifting equipment plays a crucial role. Among them, truck-mounted cranes are devices that use hydraulic lifting and telescopic systems to lift, rotate, and transport goods. They are usually mounted on trucks and generally consist of a truck chassis, cargo box, and crane.
[0003] Currently, the boom of a truck-mounted crane mainly consists of a telescopic cylinder, a multi-section telescopic boom, and a telescopic rope mechanism. Specifically, the piston rod of the telescopic cylinder is hinged to one boom section, and the cylinder barrel is hinged to the second boom section. Thus, the telescopic cylinder directly drives the second boom section to extend and retract. The remaining boom sections are driven by their respective telescopic rope mechanisms to meet the needs of different boom lengths. During the extension and retraction of the boom, the guide bracket at the end of the cylinder barrel slides along the lower surface of the inner wall of each telescopic boom section.
[0004] However, the multi-section telescopic boom has a gradually decreasing cross-section when connected from the outside to the inside, resulting in a stepped structure on the lower surface of the inner wall of each section. During the extension and retraction of the boom, the guide bracket at the end of the cylinder will move along this stepped structure, causing the extension section of the telescopic cylinder to bounce. Especially when the boom is retracted, the guide bracket at the end of the cylinder needs to move from the lower step to the higher step, which will also cause a certain impact on the telescopic cylinder and easily damage it. Utility Model Content
[0005] This utility model provides a crane boom and lifting machinery to solve or improve the problem in related technologies where the lower surface of the inner wall of each telescopic boom section is distributed in a stepped structure, causing the telescopic section of the telescopic cylinder to jump and easily damage the telescopic cylinder.
[0006] In a first aspect, this utility model provides a lifting boom, comprising:
[0007] A multi-section telescopic boom, comprising a first section, a second section, a third section, and a final section that are sequentially connected from the outside in.
[0008] A telescopic cylinder is disposed within the multi-section telescopic arm. The fixed end of the telescopic cylinder is connected to the first section of the arm, and the driving section of the telescopic cylinder is connected to the second section of the arm. The driving section of the telescopic cylinder is provided with a guide bracket, which is adapted to slide along the bottom inner wall of the last section of the arm.
[0009] A support member is arranged in the third section arm, and is located at a side of the third section arm close to the fixed end of the telescopic oil cylinder. The support member is adapted to support the driving section of the telescopic oil cylinder after the guide bracket is separated from the last section arm, and the support member is in sliding connection with the driving section of the telescopic oil cylinder.
[0010] In an optional embodiment, the support member is provided with an arc-shaped support surface, and a diameter of the arc-shaped support surface is greater than an outer diameter of the driving section of the telescopic oil cylinder.
[0011] In an optional embodiment, the third section arm comprises:
[0012] A pair of first vertical plates are arranged at intervals along a width direction of the third section arm. The support member is arranged between the pair of first vertical plates, and a gap is formed between the first vertical plates and the support member.
[0013] In an optional embodiment, the third section arm further comprises:
[0014] A fixing member is arranged on the first vertical plate, and is arranged along the width direction of the third section arm. A side wall of the support member is provided with a groove opposite to the fixing member, and the fixing member is inserted into the groove.
[0015] In an optional embodiment, the fixing member is at least two, and the two sides of the support member are respectively provided with the fixing member. The groove and the fixing member are arranged one by one.
[0016] In an optional embodiment, the third section arm further comprises:
[0017] A sliding sleeve is sleeved on the fixing member, and is arranged between the fixing member and the groove. The sliding sleeve is arranged in sliding mode in the groove.
[0018] In an optional embodiment, an outer wall of the fixing member is provided with an external thread, and an inner wall of the sliding sleeve is provided with an internal thread matched with the external thread.
[0019] In an optional embodiment, the first vertical plate is provided with a mounting hole. The fixing member is arranged in the mounting hole and extends into the groove. The mounting hole is a waist-shaped hole arranged along a height direction of the third section arm.
[0020] In an optional embodiment, the third section arm further comprises:
[0021] A pair of second vertical plates are respectively arranged on the side of the pair of first vertical plates away from the support, and the second vertical plates and the first vertical plates are arranged in the width direction of the third section arm, the second vertical plates are provided with avoiding holes for inserting installation tools, and the installation tools are suitable for installing the fixing members.
[0022] In a second aspect, the utility model also provides a hoisting machine, including the hoisting arm of any one of above.
[0023] The hoisting arm provided by the utility model can effectively support the driving section of the telescopic oil cylinder through the support when the driving section drives the guide bracket to be separated from the last section arm during the telescoping process, avoid shaking and impact caused by sudden change due to up and down steps, ensure smooth sliding of the driving section of the telescopic oil cylinder, and improve the service life of the telescopic oil cylinder. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0025] Figure 1 It is the installation schematic view of the support of the embodiment of the utility model;
[0026] Figure 2 It is the partial sectional view of the support of the embodiment of the utility model;
[0027] Figure 3 It is the partial schematic view of the fixing member of the embodiment of the utility model;
[0028] Figure 4 It is the cooperation schematic view of the support and the telescopic oil cylinder of the embodiment of the utility model;
[0029] Figure 5 It is the structural schematic view of the hoisting arm of the embodiment of the utility model in the completely retracted state;
[0030] Figure 6 It is the structural schematic view of the hoisting arm of the embodiment of the utility model in the partially extended state;
[0031] Figure 7 It is the structural schematic view of the hoisting arm of the embodiment of the utility model in the completely extended state.
[0032] EXPLANATION OF REFERENCE NUMERALS:
[0033] 1, Multi-section telescopic arm; 101, First section arm; 102, Second section arm; 103, Third section arm; 1031, First vertical plate; 10311, Mounting hole; 1032, Second vertical plate; 10321, Avoidance hole; 104, Fourth section arm; 105, Fifth section arm; 2, Telescopic oil cylinder; 201, Fixed end; 202, Drive section; 3, Guide support; 4, Support; 401, Arc-shaped support surface; 402, Groove; 5, Gap; 6, Fixing member; 601, External thread; 7, Slide sleeve; 701, Internal thread; 8, Elastic pad. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0035] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.
[0036] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0037] In the present application, unless specifically and expressly defined otherwise, a first feature "on" or "under" a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.
[0038] The lifting arm and the hoisting machinery according to the embodiments of the present application are described below in combination with Figures 1 to 7
[0039] According to the embodiments of the present application, on the one hand, a lifting arm is provided, which is suitable for hoisting equipment such as a truck-mounted crane, as shown in Figure 5 The lifting arm includes a multi-section telescopic arm 1, a telescopic oil cylinder 2, and a support member 4. Specifically, as shown in Figure 6 The multi-section telescopic arm 1 includes a first section arm 101, a second section arm 102, a third section arm 103, and a last section arm, which are sequentially sleeved from outside to inside. Optionally, in the present embodiment, if the multi-section telescopic arm 1 includes a first section arm 101, a second section arm 102, a third section arm 103, and a fourth section arm 104, which are sequentially sleeved from outside to inside, the fourth section arm 104 is the last section arm; if the multi-section telescopic arm 1 includes a first section arm 101, a second section arm 102, a third section arm 103, a fourth section arm 104, and a fifth section arm 105, which are sequentially sleeved from outside to inside, the fifth section arm 105 is the last section arm, and so on. Since the cross sections of the section arms gradually decrease from outside to inside, there is a height difference between adjacent section arms, so that the inner wall lower surfaces of the section arms form a stepped structure.
[0040] As shown in Figure 6 The telescopic oil cylinder 2 is arranged in the multi-section telescopic arm 1, and a fixed end 201 of the telescopic oil cylinder 2 is connected with the first section arm 101. Optionally, in the present embodiment, a piston rod of the telescopic oil cylinder 2 is hingedly connected with the first section arm 101 through a pin shaft, and a first supporting point A of the telescopic oil cylinder 2 is formed at the hinged position.
[0041] As shown in Figure 6 As shown, the driving section 202 of the telescopic oil cylinder 2 is connected with the second section arm 102, and the driving section 202 of the telescopic oil cylinder 2 is provided with a guide bracket 3 which is adapted to slide along the inner wall of the bottom of the last section arm. Optionally, in the embodiment, one end of the cylinder tube of the telescopic oil cylinder 2 close to the first fulcrum A is fixedly connected with the second section arm 102, so that the telescopic oil cylinder 2 directly drives the second section arm 102 to perform telescopic movement. The rest of the section arms are correspondingly provided with pulley rope arrangement mechanisms, which are driven by the corresponding pulley rope arrangement mechanisms to perform telescopic movement. The other end of the cylinder tube of the telescopic oil cylinder 2 away from the first fulcrum A is provided with the guide bracket 3, and the guide bracket 3 is provided with a roller to reduce the friction between the guide bracket 3 and the lower surface of the inner wall of the last section arm. The position of the roller of the guide bracket 3 forms the third fulcrum C of the telescopic oil cylinder 2.
[0042] As shown in the figure, Figure 1 The support 4 is arranged in the third section arm 103. As shown in the figure, Figure 6 The support 4 is located on the side of the third section arm 103 close to the fixed end 201 of the telescopic oil cylinder 2. The support 4 is adapted to support the driving section 202 of the telescopic oil cylinder 2 after the guide bracket 3 is separated from the last section arm, and the support 4 is slidably connected with the driving section 202 of the telescopic oil cylinder 2. The position of the support 4 forms the second fulcrum B of the telescopic oil cylinder 2.
[0043] Specifically, taking the single-oil-cylinder five-section arm as an example, as shown in the figure, Figure 5 The telescopic oil cylinder 2 piston rod is hinged with the first section arm 101 at A, the guide bracket 3 roller at the end of the cylinder tube of the telescopic oil cylinder 2 contacts with the lower surface of the inner wall of the last section arm (i.e. the fifth section arm 105) at C1, and the support 4 supports the telescopic oil cylinder 2 at B1. When the telescopic oil cylinder 2 is parallel to the telescopic arm, the telescopic arm is fully retracted.
[0044] When the telescopic oil cylinder 2 is elongated, the telescopic oil cylinder 2 and the pulley rope arrangement mechanism drive the telescopic arm to perform elongation action, and the pulley rope arrangement mechanism makes the elongation speed of the telescopic arm faster than the elongation speed of the telescopic oil cylinder 2, so that the relative displacement between the guide bracket 3 and the telescopic arm occurs, and thus the guide bracket 3 slides along the lower surface of the inner wall of the multi-section telescopic arm 1. Before the guide bracket 3 roller leaves the last section arm (i.e. the fifth section arm 105), the guide bracket 3 and the support 4 jointly support the telescopic oil cylinder 2.
[0045] When the guide bracket 3 roller leaves the last section arm (i.e. the fifth section arm 105) and enters the fourth section arm 104, because the lower surfaces of the inner walls of the fourth section arm 104 and the fifth section arm 105 have a height difference (i.e. there is a step surface), if the support 4 is not arranged, the guide bracket 3 will vibrate due to the sudden change caused by the step surface. In the embodiment, the support 4 is arranged, as shown in the figure, Figure 6As shown, before the mutation occurs, the support 4 supports the telescopic oil cylinder 2 at B2 close to the middle of the oil cylinder, and when the guide bracket 3 roller enters the fourth section arm 104, the support 4 can effectively support the telescopic oil cylinder 2, so that the guide bracket 3 roller is kept suspended after leaving the fifth section arm 105 (that is, not in contact with the lower surface of the inner wall of the fourth section arm 104 at C2), ensuring that the height position of the end of the telescopic oil cylinder 2 remains unchanged, thereby effectively avoiding the shaking of the end of the telescopic oil cylinder 2 caused by the mutation of the step surface.
[0046] In combination Figures 5 to 7 As can be seen, during the extension of the lifting arm, the greater the extension of the telescopic oil cylinder 2, the greater the ratio of the distance AB to the distance AC, and obviously, the better the support effect of the support 4 on the telescopic oil cylinder 2, ensuring that the guide bracket 3 at the end of the cylinder remains suspended, and the cylinder barrel smoothly slides on the support 4. As shown, Figure 7 As shown, the lifting arm is in a fully extended state, the support 4 supports the telescopic oil cylinder 2 at B3, and the guide bracket 3 roller is kept suspended at C3.
[0047] Similarly, when the lifting arm is retracted, the telescopic oil cylinder 2 is retracted, and the cylinder barrel of the telescopic oil cylinder 2 smoothly slides on the support 4 until the guide bracket 3 roller enters the last section arm (that is, the fifth section arm 105) and contacts the lower surface of the inner wall, and then changes to the telescopic oil cylinder 2 being supported by the guide bracket 3 and the support 4 together, and then during the retraction of the lifting arm, the ratio of the distance AB to the distance AC becomes smaller and smaller, so that the guide bracket 3 plays a major supporting role. In this way, the telescopic oil cylinder 2 keeps smooth sliding during the entire arm retraction process, avoiding the shaking and impact caused by the movement of the guide bracket 3 from the low step to the high step.
[0048] In this way, during the extension and retraction of the lifting arm, when the driving section 202 of the telescopic oil cylinder 2 drives the guide bracket 3 to disengage from the last section arm, the support 4 can effectively support the driving section 202 of the telescopic oil cylinder 2, avoiding the shaking and impact caused by the mutation of the telescopic oil cylinder 2 due to the up and down steps, ensuring the smooth sliding of the driving section 202 of the telescopic oil cylinder 2, and improving the service life of the telescopic oil cylinder 2.
[0049] Optionally, in some embodiments of the present application, as shown, Figure 1 The support 4 is provided with an arc-shaped support surface 401, and the diameter of the arc-shaped support surface 401 is greater than the outer diameter of the driving section 202 of the telescopic oil cylinder 2. That is, in this embodiment, the diameter of the arc-shaped support surface 401 is greater than the outer diameter of the cylinder barrel of the telescopic oil cylinder 2. In this way, as shown, Figure 4 When the telescopic oil cylinder 2 is supported on the support 4, the telescopic oil cylinder 2 and the support 4 are in line contact, which can reduce the friction between the telescopic oil cylinder 2 and the support 4, reduce the wear of the telescopic oil cylinder 2, and prolong the service life of the telescopic oil cylinder 2.
[0050] Optionally, in some embodiments of the utility model, as shown in Figure 2 As shown in the figure, the third section arm 103 includes a pair of first vertical plates 1031, a pair of first vertical plates 1031 are arranged along the width direction of the third section arm 103, the support piece 4 is arranged between a pair of first vertical plates 1031, and there is a gap 5 between the first vertical plate 1031 and the support piece 4. By so arranging, the installation space of the support piece 4 is formed between a pair of first vertical plates 1031, and the gap 5 is left between the first vertical plate 1031 and the support piece 4, which can reduce the influence of the third section arm 103 arm cylinder welding size error on the installation of the support piece 4, reserve adjustment space for the support piece 4, and facilitate assembly.
[0051] Optionally, in some embodiments of the utility model, as shown in Figure 2 As shown in the figure, the crane arm further includes a fixing piece 6, the fixing piece 6 is arranged on the first vertical plate 1031, and the fixing piece 6 is arranged along the width direction of the third section arm 103. The side wall of the support piece 4 is provided with a groove 402 opposite to the fixing piece 6, and the fixing piece 6 is inserted into the groove 402. By so arranging, the support piece 4 and the first vertical plate 1031 can be positioned and fixed through the fixing piece 6, which is convenient to operate, avoids the sliding of the support piece 4 along the length direction of the third section arm 103, and thus ensures that the support piece 4 reliably supports the telescopic oil cylinder 2.
[0052] Optionally, in some embodiments of the utility model, as shown in Figure 2 As shown in the figure, the fixing piece 6 is at least two, the fixing piece 6 is arranged on both sides of the support piece 4, and the groove 402 and the fixing piece 6 are arranged one by one. By so arranging, the fixing piece 6 is arranged on both sides of the support piece 4, so that the support piece 4 is subjected to symmetrical constraint force in the width direction, effectively prevents the support piece 4 from tilting, deviating or twisting, and significantly enhances the structural stability.
[0053] Optionally, in some embodiments of the utility model, as shown in Figure 2 As shown in the figure, the crane arm further includes a sliding sleeve 7, the sliding sleeve 7 is sleeved on the fixing piece 6, the sliding sleeve 7 is arranged between the fixing piece 6 and the groove 402, and the sliding sleeve 7 is slidingly arranged in the groove 402. By so arranging, the fixing piece 6 and the support piece 4 are connected through the sliding sleeve 7, and the relative movement between the sliding sleeve 7 and the support piece 4 can be generated, so that when the support piece 4 supports the telescopic oil cylinder 2, the support piece 4 can move left and right in the width direction, the support piece 4 and the telescopic oil cylinder 2 are automatically centered, and the support piece 4 can better support the telescopic oil cylinder 2.
[0054] Optionally, in some embodiments of the utility model, as shown in Figure 3As shown, the outer wall of the fixing member 6 is provided with external threads 601, and the inner wall of the sliding sleeve 7 is provided with internal threads 701 matched with the external threads 601. Optionally, the fixing member is a bolt. In addition, a spring washer 8 can also be arranged to prevent loosening, buffer and reduce vibration, compensate for the loss of pre-tightening force, etc. In this way, the fixing member 6 can be screwed into the sliding sleeve 7, simplifying the installation process and facilitating maintenance and replacement.
[0055] Optionally, in some embodiments of the utility model, as shown in Figure 2 As shown, the first vertical plate 1031 is provided with a mounting hole 10311, the fixing member 6 is arranged in the mounting hole 10311 and extends into the groove 402, and the mounting hole 10311 is a waist-shaped hole arranged along the height direction of the third segment arm 103. In this way, the vertical adjustment of the fixing member 6 is facilitated, the influence of welding errors, manufacturing errors, etc. on the installation of the support member 4 is reduced, and the smooth installation is ensured.
[0056] Optionally, in some embodiments of the utility model, the third segment arm 103 further includes a pair of second vertical plates 1032, and the pair of second vertical plates 1032 are respectively arranged on the side of the pair of first vertical plates 1031 away from the support member 4. The second vertical plate 1032 and the first vertical plate 1031 are arranged in the width direction of the third segment arm 103, the second vertical plate 1032 is provided with a relief hole 10321 for inserting an installation tool, and the installation tool is suitable for installing the fixing member 6. Optionally, the installation tool is a wrench, etc. In this way, by arranging the second vertical plate 1032, the structural strength of the installation position of the support member 4 is further improved, which helps to enhance the integrity and stability of the structure of the third segment arm 103, and the installation tool can be conveniently inserted into the assembly position through the relief hole 10321, and the installation and disassembly of the fixing member 6 can be quickly and effectively completed.
[0057] According to the embodiments of the utility model, on the other hand, a hoisting machine is also provided, which includes the hoisting arm in the above-mentioned embodiments. Optionally, the hoisting machine is a truck crane, etc. The derivation process of the beneficial effects of the hoisting machine is roughly similar to the derivation process of the beneficial effects of the hoisting arm, so it will not be repeated here.
[0058] Although the embodiments of the utility model have been described in conjunction with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A load arm, characterized in that The utility model relates to a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece.
2. A load arm according to claim 1, characterised in that The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece.
3. A load arm according to claim 1 or 2, characterised in that, The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece.
4. A load arm according to claim 3, characterised in that, The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece.
5. A load arm according to claim 4, characterised in that, The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece.
6. A load arm according to claim 4, characterised in that The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece.
7. A load arm according to claim 6, characterised in that, The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece.
8. A load arm according to claim 4, characterised in that The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece.
9. A load arm according to claim 8, characterised in that, The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. 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The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The utility model discloses a telescopic arm, and particularly relates to a telescopic arm with a support piece. The A pair of second vertical plates (1032) are respectively arranged on the side of the pair of first vertical plates (1031) away from the support (4), and the second vertical plates (1032) and the first vertical plates (1031) are arranged in the width direction of the third section arm (103), and the second vertical plates (1032) are provided with a avoiding hole (10321) for inserting a mounting tool, and the mounting tool is suitable for mounting the fixing part (6).
10. A hoisting machine characterized by A load arm comprising a load arm according to any one of claims 1 to 9.