Boom section of telescopic boom and working machinery

Abstract

A boom section of a telescopic boom and working machinery. The boom section of a telescopic boom comprises a boom section body (1), first sliding blocks (2) and first connecting mechanisms. At least one end of the boom section body (1) is provided with the first sliding blocks (2). The first sliding blocks (2) are fixed to the boom section body (1) by means of the first connecting mechanisms. The boom section body (1) is at least provided with a first side wall (3) and a second side wall (4) which are arranged at an angle. Each first sliding block (2) at least comprises a first sliding plate part (5), a second sliding plate part (6) and an arc-shaped transition part (7), the first sliding plate part (5) is arranged opposite to the first side wall (3), the second sliding plate part (6) is arranged opposite to the second side wall (4), the arc-shaped transition part (7) is arranged between the first sliding plate part (5) and the second sliding plate part (6), and the first sliding plate part (5), the arc-shaped transition part (7) and the second sliding plate part (6) are formed as an integrated structure. In this way, each first sliding block is configured as an integrated bent structure, so that the rigidity and the bearing capacity thereof are improved; and the first sliding block overlaps both side walls of the boom section body, thereby improving the bearing capacity of the boom section.

Description

Arm cylinder of telescopic arm and working machine

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410701548.2, filed May 31, 2024, entitled "Arm cylinder of telescopic arm and working machine", which is incorporated by reference herein in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of telescopic arms, and in particular to an arm cylinder of a telescopic arm and a working machine. BACKGROUND

[0004] The boom of some working machines is arranged in the form of a telescopic arm. The telescopic arm includes a plurality of arm cylinders, which are nested together. Among the two adjacent arm cylinders, a sliding block is arranged on the inner wall of the outer arm cylinder (hereinafter referred to as the outer arm cylinder), and the inner arm cylinder (hereinafter referred to as the inner arm cylinder) is in sliding cooperation with the sliding block.

[0005] In the related art, the same number of sliding blocks are generally arranged according to the side wall surfaces of the arm cylinder, and a corresponding sliding block is arranged for each side wall surface. The sliding block is used to slide with the inner arm cylinder to reduce the wear of the outer arm cylinder. The carrying capacity of the sliding block itself is relatively poor, and unreasonable sliding block structure and arrangement also cause poor force bearing of the arm cylinder.

[0006] Therefore, the problems of poor carrying capacity of the sliding block of the telescopic arm and poor force bearing of the arm cylinder in the related art need to be solved.

[0007] SUMMARY

[0008] The present application provides an arm cylinder of a telescopic arm and a working machine to solve the defects of poor carrying capacity of the sliding block of the telescopic arm and poor force bearing of the arm cylinder in the related art.

[0009] The present application provides an arm cylinder of a telescopic arm, comprising an arm cylinder body, a first sliding block and a first connecting mechanism, at least one end of the arm cylinder body is provided with the first sliding block, and the first sliding block is fixed to the arm cylinder body through the first connecting mechanism;

[0010] The arm cylinder body has at least a first side wall and a second side wall arranged at an angle;

[0011] The first sliding block comprises at least a first sliding plate part, a second sliding plate part and an arc surface transition part, the first sliding plate part is arranged opposite to the first side wall, the second sliding plate part is arranged opposite to the second side wall, and the arc surface transition part is arranged between the first sliding plate part and the second sliding plate part, and the first sliding plate part, the arc surface transition part and the second sliding plate part are formed in an integral structure.

[0012] The arm cylinder of the telescopic arm further comprises an adjusting mechanism, which is adapted to adjust the distance between the first sliding plate and the first side wall and the distance between the second sliding plate and the second side wall.

[0013] The adjusting mechanism comprises at least a gasket and a fastening assembly, the gasket is selectively arranged between the first sliding plate and the first side wall, or the gasket is selectively arranged between the second sliding plate and the second side wall, and the fastening assembly is adapted to fixedly connect the gasket to at least one of the first sliding block and the arm cylinder body.

[0014] The arm cylinder of the telescopic arm provided by the application, wherein the gasket is only adapted to be arranged between the first sliding plate and the first side wall, and the adjusting mechanism further comprises an adjusting rod.

[0015] The adjusting rod is arranged in the arm cylinder body, the distance between the first end of the adjusting rod and the second side wall is adjustable, the first end of the adjusting rod abuts against the second sliding plate, and the first end of the adjusting rod and the second end of the adjusting rod are respectively located on the opposite sides of the second side wall.

[0016] The arm cylinder of the telescopic arm provided by the application, wherein the first connecting mechanism comprises a bottom plate, a limiting plate and a first connecting piece, the bottom plate is arranged between the first sliding block and the arm cylinder body, and the bottom plate is fixedly connected with the first sliding block.

[0017] The limiting plate is provided with a limiting protrusion at one end, and the limiting protrusion can enter and exit the limiting hole in the bottom plate.

[0018] The first connecting piece detachably connects the other end of the limiting plate with the end of the arm cylinder body.

[0019] The arm cylinder of the telescopic arm provided by the application, wherein the bottom plate is provided with a first extension, the first extension is in a suspended state relative to the end of the arm cylinder body, and the limiting hole is arranged in the first extension.

[0020] The gasket is provided with a second extension, the fastening assembly comprises a fastener, the second extension is arranged in overlap with the first extension and is detachably connected by the fastener.

[0021] The arm cylinder of the telescopic arm provided by the application, wherein the limiting plate is provided with a avoiding space for avoiding the second extension, so that the edge of the gasket close to the limiting plate abuts against the limiting plate.

[0022] According to the arm cylinder of the telescopic arm provided in the application, the limiting plate is provided with a through hole, the extension direction of the through hole is parallel to the surface of the first sliding plate part, and the first connecting piece can pass through the limiting plate at any position of the through hole.

[0023] The end surface of the arm cylinder body is provided with a threaded hole, and the first connecting piece passes through the through hole and the threaded hole to be threadedly connected with the arm cylinder body.

[0024] According to the arm cylinder of the telescopic arm provided in the application, the arm cylinder further comprises a second sliding block and a second connecting mechanism, and the second sliding block is in the form of a flat plate.

[0025] The second connecting mechanism comprises a connecting support and a second connecting piece, the second connecting piece detachably connects the connecting support with the end part of the arm cylinder body, the connecting support is provided with a first limiting part and a second limiting part, the second sliding block is located between the first limiting part and the second limiting part to limit the position of the second sliding block along the axial direction of the arm cylinder body.

[0026] According to the arm cylinder of the telescopic arm provided in the application, the inside of the first sliding block forms an accommodating cavity, the first sliding block is provided with an oil injection nozzle, and the side of the first sliding block away from the first side wall and the second side wall is provided with an oil outlet.

[0027] The application further provides a working machine comprising a plurality of arm cylinders, and the arm cylinder is the arm cylinder of the telescopic arm described above.

[0028] In any two adjacent arm cylinders, the outer side wall of at least the tail end of the inner one is provided with a first sliding block, or the inner side wall of at least the head end of the outer one is provided with the first sliding block.

[0029] The telescopic arm barrel provided by the application comprises an arm barrel body, a first sliding block and a first connecting mechanism, the first sliding block is arranged at least at one end of the arm barrel body, and the first sliding block is fixed to the arm barrel body through the first connecting mechanism. The arm barrel body has at least a first side wall and a second side wall arranged at an angle, the first sliding block comprises at least a first sliding plate part, a second sliding plate part and an arc transition part, the first sliding plate part is arranged opposite to the first side wall, and the second sliding plate part is arranged opposite to the second side wall. The arc transition part is arranged between the first sliding plate part and the second sliding plate part, and the first sliding plate part, the arc transition part and the second sliding plate part are formed in an integrated structure. In this way, the first sliding block is arranged in a bent shape in an integrated structure, the self rigidity and the carrying capacity are improved, the first sliding block overlaps with the two side walls of the arm barrel body at the same time, the contact area of the first sliding block and the arm barrel body is increased, the stress effect of the first sliding block and the arm barrel body is improved, the carrying capacity of the arm barrel is improved, and the arc transition part can well adapt to the cooperation with the surface of the adjacent arm barrel, thereby solving the problems of poor carrying capacity of the sliding block of the telescopic arm and poor stress of the arm barrel in the related art.

[0030] Further, in the work machine provided by the application, since the telescopic arm barrel has the advantages as described above, the work machine also has the advantages as described above. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Fig. 1 is a structural schematic view of an end position of a telescopic arm barrel provided by the application;

[0033] Fig. 2 is an enlarged view of I in Fig. 1;

[0034] Fig. 3 is a structural schematic view of a first connecting mechanism provided by the application in one perspective view;

[0035] Fig. 4 is a structural schematic view of the first connecting mechanism provided by the application in another perspective view;

[0036] Fig. 5 is an exploded view of the first connecting mechanism, the first sliding block and the gasket provided by the application;

[0037] Fig. 6 is a structural schematic view of an adjusting rod provided by the application;

[0038] Fig. 7 is a structural schematic view of a lock washer and a lock nut provided by the application;

[0039] Fig. 8 is a structural schematic diagram of a second sliding block and a connecting bracket provided in the present application;

[0040] Fig. 9 is an exploded view of a second sliding block and a connecting bracket provided in the present application;

[0041] Fig. 10 is a structural schematic diagram of an end position of another telescopic arm provided in the present application; and

[0042] Fig. 11 is a partial structural schematic diagram of a telescopic arm provided in the present application.

[0043] Reference signs:

[0044] 1, arm barrel body; 2, first sliding block; 3, first side wall; 4, second side wall; 5, first sliding plate part; 6, second sliding plate part; 7, arc transition part; 8, gasket; 9, adjusting rod; 10, bottom plate; 11, limiting plate; 12, first connecting piece; 13, limiting protrusion; 14, first extension part; 15, second extension part; 16, fastener; 17, through hole; 18, second sliding block; 19, connecting bracket; 20, second connecting piece; 21, first limiting part; 22, second limiting part; 23, oil injection nozzle; 24, oil outlet; 25, locking nut; 26, lock washer; 27, connecting plate; 28, third side wall. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the accompanying drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0046] The arm barrel of the telescopic arm of the present application will be described below in conjunction with Figs. 1 to 11.

[0047] As shown in Figs. 1 to 11, the arm barrel of the telescopic arm provided in the embodiments of the present application comprises an arm barrel body 1, a first sliding block 2 and a first connecting mechanism.

[0048] Specifically, the first sliding block 2 is arranged at at least one end of the arm barrel body 1, and the first sliding block 2 is fixed to the arm barrel body 1 through the first connecting mechanism.

[0049] For the telescopic arm capable of realizing multi-stage telescopic expansion, the telescopic arm has a plurality of arm barrels, and in any two adjacent arm barrels, the outer side wall of the tail end of the inner one is provided with the first sliding block 2, and the inner side wall of the head end of the outer one is provided with the first sliding block 2. In each arm barrel of the telescopic arm, only the inner side wall of the head end of the outermost arm barrel is provided with the first sliding block 2, and only the outer side wall of the tail end of the innermost arm barrel is provided with the first sliding block 2.

[0050] In the embodiment, the arm barrel body 1 has at least a first side wall 3 and a second side wall 4 arranged at an angle. The first sliding block 2 at least includes a first sliding plate part 5, a second sliding plate part 6 and an arc transition part 7, and generally, the first sliding plate part 5 and the second sliding plate part 6 are arranged at an angle. The first sliding plate part 5 is arranged opposite to the first side wall 3, and the second sliding plate part 6 is arranged opposite to the second side wall 4. The first sliding plate part 5 overlaps the first side wall 3, and the second sliding plate part 6 overlaps the second side wall 4. The contact area between the first sliding block 2 and the arm barrel body 1 is large, and the stress effect is good.

[0051] The arc transition part 7 is arranged between the first sliding plate part 5 and the second sliding plate part 6, and the first sliding plate part 5, the arc transition part 7 and the second sliding plate part 6 are formed in an integrated structure, and the self-rigidity is strong.

[0052] In this way, the first sliding block 2 is arranged in a bending shape in an integrated structure, the self-rigidity and the carrying capacity are improved, the first sliding block 2 overlaps the two side walls of the arm barrel body 1 at the same time, the contact area between the first sliding block 2 and the arm barrel body 1 is increased, the stress effect of the first sliding block 2 and the arm barrel body 1 is improved, which is conducive to improving the carrying capacity of the arm barrel, and the arc transition part 7 can well adapt to the cooperation with the surface of the adjacent arm barrel, thereby solving the problems of poor carrying capacity of the sliding block and poor stress of the arm barrel in the related art.

[0053] It should be noted that the first sliding block 2 can be integrally formed by casting, forging and the like, or the first sliding plate part 5, the second sliding plate part 6 and the arc transition part 7 can be first machined, and then the first sliding plate part 5 and the arc transition part 7 are fixedly connected together by welding or the like, and the second sliding plate part 6 and the arc transition part 7 are fixedly connected together by welding or the like.

[0054] It should be further noted that the arm barrel body 1 only needs to have the first side wall 3 and the second side wall 4 arranged at an angle, and the positions of the first side wall 3 and the second side wall 4 arranged at an angle are not limited. Specifically, the cross-sectional shape of the arm barrel body 1 can be but is not limited to a quadrilateral, a hexagon or an octagon, and the number of sides of the cross-sectional shape of the arm barrel body 1 is not limited in the application, as long as the arm barrel body 1 has the first side wall 3 and the second side wall 4 arranged at an angle.

[0055] The first slider 2 comprises at least a first sliding plate part 5, a second sliding plate part 6 and an arc transition part 7. In some cases, the first slider 2 can further comprise a third sliding plate part, which is arranged on the side of the second sliding plate part 6 away from the first sliding plate part 5, and an arc transition part is arranged between the third sliding plate part and the second sliding plate part 6.

[0056] It can be understood that the first slider 2 in the embodiment comprises at least two sliding plate parts, and an arc transition part is arranged between adjacent sliding plate parts. When the cross-sectional shape of the arm cylinder body 1 is polygonal, the number of sliding plate parts included in each first slider 2 can be appropriately increased.

[0057] It should be further explained that the arm cylinder body 1 comprises a cylinder body and an end flange, wherein the cylinder body is formed by a bending process, and after the cylinder body is processed, the end flange is fixed to the end of the cylinder body. The cylinder body formed by the bending process has an arc surface between the first side wall and the second side wall, and the arc transition part 7 of the first slider 2 in the embodiment can well adapt to the surface of the arm cylinder body 1 where the first slider 2 is located, and also well adapt to the surface of the adjacent arm cylinder body 1.

[0058] The number of first sliders 2 arranged on the arm cylinder body 1 is not specifically limited in the present application, and the number of first sliders 2 can be determined according to the number of sides of the cross-sectional shape of the arm cylinder body 1.

[0059] In the embodiment of the present application, the arm cylinder of the telescopic arm further comprises an adjusting mechanism, which is arranged between the first slider 2 and the arm cylinder body 1, and is used to adjust the distance between the first sliding plate part 5 and the first side wall 3 and the distance between the second sliding plate part 6 and the second side wall 4, that is, to adjust the relative position of the first slider 2 and the arm cylinder body 1.

[0060] By adjusting the relative position of the first slider 2 and the arm cylinder body 1, the processing errors of the arm cylinder body 1 and the first slider 2 can be adapted, and the first slider 2 on the arm cylinder can be ensured to be in sliding contact with another arm cylinder.

[0061] The adjusting mechanism comprises at least a gasket 8 and a fastening assembly. The gasket 8 is optionally arranged between the first sliding plate part 5 and the first side wall 3, or the gasket 8 is optionally arranged between the second sliding plate part 6 and the second side wall 4.

[0062] Specifically, shims 8 can be provided only between the first sliding plate portion 5 and the first side wall 3. When adjusting the distance between the first sliding plate portion 5 and the first side wall 3, and the distance between the second sliding plate portion 6 and the second side wall 4, the number of shims 8 between the first sliding plate portion 5 and the first side wall 3 can be adjusted. Alternatively, shims 8 can be provided only between the second sliding plate portion 6 and the second side wall 4. When adjusting the distance between the first sliding plate portion 5 and the first side wall 3, and the distance between the second sliding plate portion 6 and the second side wall 4, the number of shims 8 between the second sliding plate portion 6 and the second side wall 4 can be adjusted simultaneously. Alternatively, shims 8 can be provided between both the first sliding plate portion 5 and the first side wall 3, and the second sliding plate portion 6 and the second side wall 4. When adjusting the distance between the first sliding plate portion 5 and the first side wall 3, and the distance between the second sliding plate portion 6 and the second side wall 4, the number of shims 8 between the first sliding plate portion 5 and the first side wall 3, and the number of shims 8 between the second sliding plate portion 6 and the second side wall 4, must be adjusted simultaneously.

[0063] After adjusting the required number of shims 8, each shim 8 is fixedly connected to at least one of the first slider 2 and the arm cylinder body 1 using fastening components to ensure the positional stability of the shims 8.

[0064] This application does not specify the number of shims 8 included in the adjusting mechanism; the more shims 8 included in the adjusting mechanism, the stronger the adjusting capability of the adjusting mechanism. Generally, the adjusting mechanism includes at least two shims 8.

[0065] In this embodiment, the relative position of the first slider 2 and the boom body 1 is adjusted by adjusting the number of shims 8. The contact area between the shims 8 and the boom body 1 and the contact area between the shims 8 and the first slider 2 are large, the force-bearing effect of the boom body 1 and the first slider 2 is better, and the stability of the adjustment mechanism and the first slider 2 is stronger. Even when the telescopic boom is subjected to eccentric loads, such as when the telescopic boom is connected to the side arm, the problem of boom tilting can be effectively avoided.

[0066] When the shim 8 is only provided between the first sliding plate portion 5 and the first side wall 3, other adjustment structures are needed between the second sliding plate portion 6 and the second side wall 4 to accommodate changes in the distance between them and to support the second sliding plate portion 6. Similarly, when the shim 8 is only provided between the second sliding plate portion 6 and the second side wall 4, other adjustment structures are needed between the first sliding plate portion 5 and the first side wall 3 to accommodate changes in the distance between them and to support the first sliding plate portion 5.

[0067] The following description uses the case where only the shim 8 is provided between the first slide plate 5 and the first side wall 3 as an example. In this case, the adjustment mechanism also includes an adjustment rod 9, which is disposed on the boom cylinder body 1 and passes through the second side wall 4 of the boom cylinder body 1. The first end and the second end of the adjustment rod 9 are located on opposite sides of the second side wall 4, respectively.

[0068] The first end of the adjusting rod 9 is used to abut against the second sliding plate 6. The second sliding plate 6 can be supported by the interaction between the end of the adjusting rod 9 and the second sliding plate 6.

[0069] The distance between the first end of the adjusting rod 9 and the second side wall 4 is adjustable. By adjusting the distance between the first end of the adjusting rod 9 and the second side wall 4, the position of the second sliding plate part 6 can be adjusted and the second sliding plate part 6 can be supported.

[0070] Specifically, the adjusting rod 9 can be threadedly connected to the boom body 1. By screwing the second end of the adjusting rod 9, the distance between the first end of the adjusting rod 9 and the second side wall 4 can be adjusted, which is convenient to operate.

[0071] After adjusting the relative position of the adjusting rod 9 and the boom body 1, to ensure the stability of their relative position, the adjusting mechanism also includes a locking nut 25. Each adjusting rod 9 is equipped with a corresponding locking nut 25, which is located at the second end of the adjusting rod 9 and is threadedly connected to it. The threaded connection between the locking nut 25 and the adjusting rod 9, as well as the threaded connection between the boom body 1 and the adjusting rod 9, cooperate to achieve a double-nut locking effect, effectively preventing misalignment of the adjusting rod 9 due to loosening.

[0072] Each first slider 2 is provided with at least two adjusting rods 9, which are spaced apart on the arm cylinder body 1. In this way, the adjustment mechanism can support at least two positions of the second slide plate 6, which can further improve the stability of the first slider 2 and optimize the force distribution effect of the first slider 2.

[0073] In a further embodiment, the adjustment mechanism also includes an anti-loosening washer 26. At least two adjusting rods 9 are correspondingly provided with one anti-loosening washer 26. The anti-loosening washer 26 has at least two through holes for each adjusting rod 9 to pass through, as shown in Figure 7. After the anti-loosening washer 26 is installed on each adjusting rod 9, the interaction between the anti-loosening washer 26 and the adjusting rod 9 restricts the rotation of the anti-loosening washer 26 relative to the adjusting rod 9. The anti-loosening washer 26 is disposed between the locking nut 25 and the arm cylinder body 1. The anti-loosening washer has a bent plate. After tightening the locking nut 25, the bent plate is bent until it contacts the side of the locking nut 25. The outer surface of the locking nut 25 is a hexagonal prism. Utilizing the interaction between the bent plate and the side of the locking nut 25, the rotation of the locking nut 25 relative to the adjusting rod 9 can be restricted, thereby further tightening the adjusting rod 9 and further increasing the difficulty of loosening the adjusting rod 9.

[0074] In this embodiment of the application, the first connecting mechanism includes a base plate 10, a limiting plate 11, and a first connecting member 12. The base plate 10 is used to be disposed between the first slider 2 and the arm cylinder body 1, and the base plate 10 is fixedly connected to the first slider 2. The base plate 10 can support and fix the first slider 2. By fixing the base plate 10 to the arm cylinder body 1, the relative fixation of the first slider 2 and the arm cylinder body 1 can be achieved.

[0075] In a specific embodiment, the base plate 10 includes at least a first plate and a second plate. The first plate contacts the first sliding plate portion 5 of the first slider 2, and the second plate contacts the second sliding plate portion 6 of the first slider 2. The first plate and the second plate are smoothly connected. Specifically, the base plate 10 can be integrally formed using a plate through a bending process.

[0076] For the connection structure between the base plate 10 and the first slider 2, a through hole can be provided on the second plate of the base plate 10, and a threaded hole can be provided on the second sliding plate part 6 of the first slider 2. A screw or bolt can be threadedly connected to the first slider 2 after passing through the base plate 10.

[0077] A limiting hole is provided on the base plate 10, and a limiting protrusion 13 is provided at one end of the limiting plate 11, which can enter and exit the limiting hole. The first connecting member 12 detachably connects the other end of the limiting plate 11 to the end of the boom body 1.

[0078] Similarly, a limiting protrusion can be set on the base plate 10, and a limiting hole can be set at one end of the limiting plate 11 to ensure that the limiting protrusion can enter and exit the limiting hole.

[0079] The relative position of the limiting plate 11 and the arm cylinder body 1 is fixed. Through the interaction between the limiting protrusion 13 and the limiting hole, the relative displacement between the limiting plate 11 and the bottom plate 10 can be limited along the axial direction of the arm cylinder body 1, thereby ensuring the stability of the position of the bottom plate 10 and the slider along the axial direction of the arm cylinder body 1.

[0080] It should be noted that the side of the first slider 2 away from the arm cylinder body 1 is used for sliding engagement with the arm cylinder body 1 of another arm cylinder, and the arm cylinder body 1 of the other arm cylinder can restrict the movement of the first slider 2 in a direction perpendicular to the axis of the arm cylinder body 1. Understandably, through the above-mentioned connecting mechanism, the relative stability between the first slider 2 and the arm cylinder body 1 can be well ensured.

[0081] In this embodiment, a threaded hole is provided on the end face of the arm cylinder body 1 for the detachable connection structure between the limiting plate 11 and the end of the arm cylinder body 1, and a through hole 17 is provided on the limiting plate 11. The first connector 12 passes through the through hole 17 and the threaded hole to be threadedly connected to the end face of the arm cylinder body 1.

[0082] The first connector 12 may be, but is not limited to, screws, bolts, etc.

[0083] In this embodiment, the through hole 17 is configured as a strip-shaped hole, and the extending direction of the through hole 17 is parallel to the extending direction of the first sliding plate portion 5 relative to the second sliding plate portion 6. That is, the extending direction of the through hole 17 is parallel to the surface of the first sliding plate portion 5. The first connecting member 12 can pass through the limiting plate 11 at any position of the through hole 17.

[0084] When adjusting the distance between the first sliding plate 5 and the first side wall 3, if the distance between the first sliding plate 5 and the first side wall 3 is different, the through hole 17 on the limiting plate 11 can overlap with the threaded hole on the arm barrel body 1, ensuring that the first connecting piece 12 can be threadedly connected to the arm barrel body 1.

[0085] In this embodiment, a first extension 14 is provided on the base plate 10, and the first extension 14 is suspended relative to the end of the boom body 1. For example, when the base plate 10 and the first slider 2 are installed on the inner side wall of the boom body 1, the first extension 14 is located outside the boom body 1.

[0086] The limiting hole is provided in the first extension 14. When the limiting plate 11 is located outside the arm cylinder body 1, the limiting protrusion 13 can be inserted into the limiting hole for easy operation.

[0087] The limiting hole can be set as a through hole. The limiting protrusion 13 of the limiting plate 11 can penetrate the base plate 10. The limiting protrusion 13 is located on the side of the base plate 10 close to the first slider 2. The limiting protrusion 13 abuts against the first slider 2, which can limit the first slider 2. It can also reduce the shear force on the connection structure between the base plate 10 and the first slider 2 when two adjacent arm cylinders slide relative to each other.

[0088] To ensure the stability of the gasket 8, it can be fixedly connected to the base plate 10. By using the limiting plate 11 to fix the base plate 10 and the boom body 1, the gasket 8 and the boom body 1 are also fixed to each other.

[0089] At this time, a second extension 15 is provided on the gasket 8. When fixedly mounted on the base plate 10, the second extension 15 overlaps with the first extension 14. The fastening assembly includes a fastener 16, which connects the first extension 14 and the second extension 15 together. The connection between the first extension 14 and the second extension 15 can be achieved from the outside of the boom body 1, making operation convenient.

[0090] The fastener 16 includes a bolt and a nut. Both the first extension 14 and the second extension 15 are provided with through holes. The bolt passes through the first extension 14 and the second extension 15 and is then connected to the nut.

[0091] In this embodiment, a clearance space is provided on the limiting plate 11 to allow the second extension 15 to extend to the side of the limiting plate 11 away from the first slider 2, while the edge of the gasket 8 near the limiting plate 11 abuts against the limiting plate 11. Through the interaction between the limiting plate 11 and the gasket 8, misalignment of the gasket 8 can be prevented.

[0092] In addition to the first sidewall 3 and the second sidewall 4, the boom body 1 also has a third sidewall 28. In this embodiment of the application, the boom of the telescopic boom also includes a second slider 18 and a second connecting mechanism. The second slider 18 is flat and corresponds to the third sidewall 28. The second slider 18 is fixedly connected to the boom body 1 through the second connecting mechanism.

[0093] The second connecting mechanism includes a connecting bracket 19 and a second connecting member 20. The connecting bracket 19 is provided with a first limiting part 21 and a second limiting part 22, and the second slider 18 is located between the first limiting part 21 and the second limiting part 22. The second connecting member 20 detachably connects the connecting bracket 19 to the end of the boom body 1. When the connecting bracket 19 is connected to the boom body 1, the first limiting part 21 and the second limiting part 22 are distributed along the axial direction of the boom body 1. Through the interaction between the first limiting part 21 and the second slider 18, and the interaction between the second limiting part 22 and the second slider 18, the position of the second slider 18 can be restricted along the axial direction of the boom body 1.

[0094] Specifically, both the first limiting part 21 and the second limiting part 22 have a plate-like structure.

[0095] A connecting plate 27 is provided at the end of the connecting bracket 19. The connecting plate 27 has a through hole and a threaded hole is provided on the end face of the boom body 1. The second connecting piece 20 passes through the connecting plate 27 and is threadedly connected to the boom body 1.

[0096] The second connector 20 may be, but is not limited to, bolts, screws, etc.

[0097] Referring to Figure 1, the cross-sectional shape of the boom body 1 is set to octagon. The lower and upper side walls of the boom body 1 in Figure 1 are the third side walls 28, and the lower side wall of the boom body 1 serves as the force-bearing surface of the boom. The left and right side walls of the boom body 1 in Figure 1 are the aforementioned second side walls 4, and the first side wall 3 is located between the second side wall 4 and the third side wall 28. The positions and quantities of the first slider 2 and the second slider 18 on the boom body 1 are shown in Figure 1.

[0098] It should be noted that, alternatively, only the first slider 2 can be provided on the boom body 1 without the second slider 18. By increasing the number of first sliders 2, the stress on the boom body 1 can be improved.

[0099] In this embodiment, both the first slider 2 and the second slider 18 have a lubrication structure. The lubrication structures on the first slider 2 and the second slider 18 are the same. The following description uses the lubrication structure on the first slider 2 as an example.

[0100] In this embodiment, a receiving cavity is formed inside the first slider 2 to hold lubricating grease. An grease inlet 23 is provided on the first slider 2 for adding lubricating grease into the receiving cavity. An oil outlet 24 is provided on the side of the first slider 2 away from the first sidewall 3 and the second sidewall 4, allowing lubricating grease to flow to the surface of the first slider 2 away from the first sidewall 3 and the second sidewall 4. During the extension and retraction of the telescopic arm, the lubricating grease can reduce friction.

[0101] An oil passage is provided on the surface of the first slider 2 away from the first sidewall 3 and the second sidewall 4 to facilitate the flow of grease and ensure lubrication effect.

[0102] The aforementioned grease nipple 23 only allows grease to flow into the receiving cavity of the first slider 2. In other words, the grease nipple 23 only allows grease to be added into the receiving cavity, and the grease nipple 23 itself can prevent the grease in the receiving cavity from leaking out.

[0103] The above-mentioned grease may be, but is not limited to, butter, and the above-mentioned grease nipple 23 may be, but is not limited to, a grease nipple.

[0104] On the other hand, this application also provides a working machine, including multiple booms of telescopic booms provided in any of the above embodiments. In any two adjacent booms, the inner boom has a first slider 2 on its outer side wall at least at its tail end, or the outer boom has a first slider 2 on its inner side wall at least at its head end, to achieve stable and smooth relative sliding between adjacent booms. The first slider 2 of the boom in the above embodiments has high rigidity and load-bearing capacity, and the force-bearing effect of the first slider 2 and the boom body 1 is excellent, giving the boom of the telescopic boom a strong load-bearing capacity. Therefore, the working machine in this embodiment has the advantage of strong load-bearing capacity. The derivation process of the beneficial effects of the working machine in this application embodiment is largely similar to the derivation process of the beneficial effects of the boom of the telescopic boom described above, so it will not be repeated here.

[0105] In the embodiments of this application, the type of operating machinery is not limited. For example, the operating machinery can be a fire truck, a crane, an aerial work platform, etc. In other words, as long as the operating machinery can use the boom of the telescopic boom in the embodiments of this application.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A telescopic boom barrel, comprising a boom barrel body, a first slider and a first connecting mechanism, wherein at least one end of the boom barrel body is provided with the first slider, and the first slider is fixed to the boom barrel body by the first connecting mechanism; The boom body has at least a first sidewall and a second sidewall that are angled together. The first slider includes at least a first sliding plate portion, a second sliding plate portion, and an arc-shaped transition portion. The first sliding plate portion is disposed opposite to the first sidewall, the second sliding plate portion is disposed opposite to the second sidewall, and the arc-shaped transition portion is disposed between the first sliding plate portion and the second sliding plate portion. The first sliding plate portion, the arc-shaped transition portion, and the second sliding plate portion form an integral structure.

2. The boom cylinder of the telescopic boom according to claim 1 further includes an adjustment mechanism, the adjustment mechanism being adapted to adjust the distance between the first sliding plate portion and the first side wall and the distance between the second sliding plate portion and the second side wall; The adjustment mechanism includes at least a shim and a fastening assembly. The shim may be selectively disposed between the first slide plate and the first side wall, or the shim may be selectively disposed between the second slide plate and the second side wall. The fastening assembly is adapted to fix the shim to at least one of the first slider and the arm cylinder body.

3. The boom cylinder of the telescopic boom according to claim 2, wherein, The shim is only suitable for placement between the first sliding plate and the first side wall, and the adjustment mechanism further includes an adjustment rod; The adjusting rod is disposed on the boom body. The distance between the first end of the adjusting rod and the second side wall is adjustable. The first end of the adjusting rod abuts against the second sliding plate. The first end and the second end of the adjusting rod are respectively located on opposite sides of the second side wall.

4. The boom cylinder of the telescopic boom according to claim 2, wherein, The first connecting mechanism includes a base plate, a limiting plate, and a first connecting member. The base plate is disposed between the first slider and the arm cylinder body, and the base plate is fixedly connected to the first slider. The base plate is provided with a limiting hole, and one end of the limiting plate is provided with a limiting protrusion, which can enter and exit the limiting hole; The first connector detachably connects the other end of the limiting plate to the end of the boom body. Off-ground connection.

5. The boom cylinder of the telescopic boom according to claim 4, wherein, The base plate is provided with a first extension, which is suspended relative to the end of the arm cylinder body, and the limiting hole is provided in the first extension. The gasket has a second extension, and the fastening assembly includes a fastener. The second extension overlaps with the first extension and is detachably connected to it via the fastener.

6. The boom cylinder of the telescopic boom according to claim 5, wherein, The limiting plate is provided with a clearance space for avoiding the second extension, so that the edge of the gasket near the limiting plate abuts against the limiting plate.

7. The boom cylinder of the telescopic boom according to claim 4, wherein, The limiting plate is provided with a through hole, the extension direction of the through hole is parallel to the surface of the first sliding plate, and the first connecting member can pass through the limiting plate at any position of the through hole. The end face of the boom body is provided with a threaded hole, and the first connector passes through the through hole and the threaded hole to be threadedly connected to the boom body.

8. The telescopic boom barrel according to claim 1 further includes a second slider and a second connecting mechanism, wherein the second slider is in the shape of a flat plate; The second connecting mechanism includes a connecting bracket and a second connecting member. The second connecting member detachably connects the connecting bracket to the end of the boom body. The connecting bracket is provided with a first limiting part and a second limiting part. The second slider is located between the first limiting part and the second limiting part to limit the position of the second slider along the axial direction of the boom body.

9. The boom cylinder of the telescopic boom according to claim 1, wherein, The first slider has an internal cavity, an oil injection nozzle is provided on the first slider, and an oil outlet is provided on the side of the first slider away from the first sidewall and the second sidewall.

10. A working machine, comprising a plurality of booms, wherein the booms are booms of a telescopic boom as described in any one of claims 1 to 9; In any two adjacent booms, the inner boom has a first slider on its outer side wall at least at its tail end, or the outer boom has a first slider on its inner side wall at least at its head end.

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