A telescopic arm for a working machine

Abstract

The application discloses a telescopic arm for a working machine, which comprises a first base arm, a first section arm group and a first telescopic oil cylinder; the first section arm group is telescopically arranged outside the first base arm; the first telescopic oil cylinder comprises a first cylinder barrel and a first piston rod group; the first cylinder barrel is movably supported in the first base arm; the first piston rod group is telescopically arranged in the first cylinder barrel and connected with the first section arm group. The first cylinder barrel and the first piston rod group are respectively supported on the first base arm and connected with the first section arm group; when the telescopic arm hoists heavy objects, the first telescopic oil cylinder can bear the force and participate in the bending of the telescopic arm; the telescopic arm has high lifting height, can hoist heavy objects and has good carrying capacity, and meets the telescopic requirements of the working machine under load.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a telescopic arm for a working machine. BACKGROUND

[0002] Working machines, such as cranes and hoists, are widely used in various fields such as construction, bridge, power, and port, for lifting and moving heavy objects. In these working machines, the telescopic arm as a key component directly affects the working efficiency and safety of the machine. The traditional telescopic arm usually consists of multiple sections through hydraulic cylinders for telescoping to achieve different lengths, thereby adapting to different working requirements.

[0003] The telescopic arms in the prior art usually use hydraulic cylinders to realize telescoping by extending or retracting. However, these telescoping cylinders only play the role of pushing or pulling the sections during the telescopic arm's force bearing process, and fail to effectively participate in the bending structure design of the telescopic arm. This design causes the telescopic arm to mainly rely on the structural strength of the sections to bear bending stress when lifting heavy objects, ignoring the auxiliary role of the hydraulic cylinders in the force bearing process. Therefore, the existing telescopic arm has limited carrying capacity when lifting heavy objects, and is prone to deformation or damage due to excessive force, affecting the safety and stability of the work.

[0004] In addition, with the increasing complexity of working machine application scenarios, higher requirements are placed on the working range and carrying capacity of the telescopic arm. The existing telescopic arm is difficult to balance high lifting height and large carrying capacity in design, resulting in the inability to meet diversified needs in actual work. This not only limits the application range of the working machine, but also increases the safety hazards in the operation process. SUMMARY

[0005] The present application aims to provide a telescopic arm for a working machine with good carrying capacity.

[0006] The present application provides a telescopic arm for a working machine, which includes a first base arm, a first section arm group, and a first telescoping cylinder. The first section arm group is telescopically arranged outside the first base arm. The first telescoping cylinder includes a first cylinder barrel and a first piston rod group. The first cylinder barrel is movably supported in the first base arm, and the first piston rod group is telescopically arranged in the first cylinder barrel and connected with the first section arm group.

[0007] In one embodiment of the telescopic arm, the telescopic arm includes a connecting seat and a first roller. One end of the connecting seat is connected to the first cylinder barrel, and the other end of the connecting seat is obliquely arranged and rotatably connected with the first roller. The first roller is rollably arranged in the first base arm.

[0008] In an embodiment of the telescopic arm, the first piston rod group comprises a plurality of first piston rods, the plurality of first piston rods are arranged in the first cylinder in a nested manner, the first arm group comprises a plurality of first arms, the plurality of first arms are arranged outside the first base arm in a nested manner, the first cylinder is provided with a first cylinder lug plate, the plurality of first piston rods are each provided with a first mounting lug plate, a first main arm among the plurality of first arms closest to the first base arm in the inside-outside direction is provided with a first cylinder mounting seat, the first main arm is provided with a first cylinder mounting seat, and the first cylinder lug plate is inserted into the first cylinder mounting seat, and each first mounting lug plate in the inside-outside direction is inserted into the corresponding first mounting seat; the telescopic direction of the first arm group is the first direction, the first cylinder is provided with a first pulley, the telescopic arm comprises a first steel wire rope, one end of the first steel wire rope is fixed on the first base arm, the other end of the first steel wire rope is wound around the first pulley, and is fixed on the first arm closest to the first main arm among the plurality of first arms in the inside-outside direction.

[0009] In an embodiment of the telescopic arm, the telescopic arm comprises a second telescopic oil cylinder, the second telescopic oil cylinder comprises a second cylinder and a second piston rod group, the second cylinder is movably arranged on the first cylinder, and the second piston rod group is telescopically arranged in the second cylinder; the first arm group comprises a plurality of second arms, the plurality of second arms are arranged outside the outermost first arm among the plurality of first arms in a nested manner, and the second piston rod group is used to drive the plurality of second arms to extend or retract.

[0010] In an embodiment of the telescopic arm, the inner wall of the outermost first segment arm of the plurality of first segment arms and the inner wall of the plurality of second segment arms are provided with second mounting seats, the second piston rod group includes a plurality of second piston rods, the second cylinder and the plurality of second piston rods are provided with second mounting lugs, and each second mounting lug along the inner-outer direction is inserted into the corresponding second mounting seat; the second mounting seat includes a second seat body and a second pressing plate, the second seat body is formed with a second slot, the second slot is formed with a second insertion opening at one end of the second seat body along the second direction, the second slot is formed with a second avoiding opening at one end of the second seat body along the third direction, and the second pressing plate is used to cover the second insertion opening; the second mounting lug includes a second lug seat body and a second insertion block, the second lug seat body is sleeved on the outer periphery of the second piston rod, and the second insertion block is connected to the outer periphery of the second lug seat body and can be inserted into the second slot from the second insertion opening, wherein the first direction, the second direction and the third direction are perpendicular to each other; the sidewalls of both ends of the second slot along the first direction are a first wall and a second wall, respectively, and the size of the first wall along the second direction is smaller than the size of the second wall along the second direction; the second pressing plate includes a first plate, a connecting plate and a second plate, the first plate and the second plate are respectively arranged at both ends of the connecting plate along the first direction, and the first plate and the second plate both extend along the second direction to define a buckle groove, and the size of the first plate along the second direction is smaller than the size of the second plate along the second direction; in the state that the second pressing plate covers the second slot, the first plate is supported at one end of the first wall along the second direction, and one end of the second wall along the second direction abuts in the buckle groove.

[0011] In an embodiment of the telescopic arm, the telescopic direction of the first segment arm group is the first direction, the first main segment arm is provided with a second pulley, the telescopic arm includes a second steel wire rope, one end of the second steel wire rope is fixedly connected to one end of the first base arm away from the second pulley along the first direction, and the other end of the second steel wire rope is wound on the second pulley; the first cylinder mounting seat is located on one side of the second pulley along the second direction; the first cylinder lug includes a first cylinder lug seat body and two first cylinder insertion blocks, the number of first cylinder mounting seats is two, the first cylinder lug seat bodies are spaced apart along the third direction and arranged on the inner wall of the first main segment arm, the first cylinder lug seat body is sleeved on the outer periphery of the first cylinder, and the two first cylinder insertion blocks are arranged on the outer periphery of the first cylinder lug seat body along the third direction, and each first cylinder insertion block is inserted into the corresponding first cylinder lug seat body.

[0012] In an embodiment of the telescopic arm, the connecting line of the two first cylinder insertion blocks along the third direction is located on one side of the central axis of the first cylinder along the second direction.

[0013] In an embodiment of the telescopic arm, the second pulley comprises a first pulley body and a second pulley body, the second pulley body is located at one end of the first pulley body close to the inner wall of the first main section arm in the third direction to define a winding groove, the second steel wire is wound in the winding groove, and the diameter of the first pulley body is greater than the diameter of the second pulley body.

[0014] In an embodiment of the telescopic arm, the telescopic arm comprises a tray arranged on the first cylinder, the tray is formed with a guide groove extending in the first direction, the second cylinder is provided with a second roller, and the second roller is rollably arranged in the guide groove; the first section arm closest to the first main section arm in the inner-outer direction is provided with a receiving block, the other end of the first steel wire is fixed to the receiving block after being wound around the first pulley, and the second cylinder is supported on the receiving block.

[0015] In an embodiment of the telescopic arm, the telescopic arm comprises a third telescopic cylinder, a second base arm and a second section arm group, the second base arm is rotatably connected with the first base arm, the second section arm group is telescopically arranged in the second base arm, the third telescopic cylinder comprises a third cylinder and a third piston rod, the third piston rod is telescopically arranged in the third cylinder, one end of the third cylinder is fixedly connected to the second base arm, and one end of the third piston rod is supported and arranged on the inner wall of the second section arm group; the telescoping direction of the second section arm group is a fourth direction, the telescopic arm comprises a support seat and a plurality of sliding blocks, the support seat is sleeved on the outer periphery of the third piston rod, at least two of the plurality of sliding blocks are arranged at two ends of the support seat in a fifth direction, and at least two of the plurality of sliding blocks are arranged at two ends of the support seat in a sixth direction, wherein the fourth direction, the fifth direction and the sixth direction are perpendicular to each other.

[0016] The beneficial effects of the present application are:

[0017] By supporting and connecting the first cylinder and the first piston rod group on the first base arm and the first section arm group respectively, the first telescopic cylinder can bear the force and participate in the bending of the telescopic arm when the telescopic arm hoists heavy objects, so that the telescopic arm has high lifting height, can hoist heavy objects, has good carrying capacity and meets the telescoping requirements of the working machine with load. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure schematic diagram of the first base arm, the first section arm group, the first telescopic cylinder, the second telescopic cylinder and the first luffing cylinder provided in the embodiment of the present application, wherein the first section arm group is in a retracted state;

[0019] Figure 2 The enlarged view of A in Figure 1

[0020] ​Figure 3 is Figure 1 a sectional view from another perspective;

[0021] Figure 4 is Figure 3 an enlarged view of B in FIG.

[0022] Figure 5 is a structural schematic view of a first base arm, a first section arm group, a first steel wire rope, a second steel wire rope and a first luffing cylinder provided by another embodiment of the present application;

[0023] Figure 6 is Figure 5 an enlarged view of C in FIG.

[0024] Figure 7 is a sectional view from another perspective of the first telescopic cylinder and the second telescopic cylinder provided by still another embodiment of the present application;

[0025] Figure 8 is a sectional view from another perspective of the first telescopic cylinder and the second telescopic cylinder provided by still another embodiment of the present application;

[0026] Figure 9 is a structural schematic view of the first telescopic cylinder and the tray provided by still another embodiment of the present application;

[0027] Figure 10 is a structural schematic view of a first base arm, a first section arm group, a first telescopic cylinder, a second telescopic cylinder and a first luffing cylinder provided by still another embodiment of the present application, wherein the first section arm group is in an extended state;

[0028] Figure 11 is a structural schematic view of a second base arm, a second section arm group and a second luffing cylinder provided by still another embodiment of the present application, wherein the second section arm group extends out of the second base arm;

[0029] Figure 12 is Figure 11 a sectional view from another perspective;

[0030] Reference signs:

[0031] 1, first base arm; 2, first section arm group; 21, first section arm; 211, first main section arm; 2111, first cylinder mounting seat; 21111, first cylinder seat body; 21111a, first cylinder insertion slot; 21112, first cylinder pressing plate; 2112, first mounting seat; 21121, first seat body; 21121a, first insertion slot; 21122, first pressing plate; 2113, first pulley; 21131, first wheel body; 21132, second wheel body; 213, first auxiliary section arm; 214, first sub-section arm; 22, second section arm; 22a, second mounting seat; 22a1, second seat body; 22a11, second insertion slot; 22a2, second pressing plate; 22a21, first plate; 22a22, connecting plate; 22a23, second plate; 221, second main section arm; 222, second auxiliary section arm; 3, first telescopic oil cylinder; 31, first cylinder; 311, first cylinder lug plate; 3111, first cylinder lug plate seat body; 3112, first cylinder insertion block; 312, first pulley; 321, first piston rod; 321a, first mounting lug plate; 321a1, first lug plate seat body; 321a2, first insertion block; 3211, first main piston rod; 3212, first auxiliary piston rod; 4, connecting seat; 5, first roller; 6, first steel wire rope; 7, second telescopic oil cylinder; 71, second cylinder; 711, second mounting lug plate; 7111, second lug plate seat body; 7112, second insertion block; 712, second roller; 721, second piston rod; 7211, second main piston rod; 7212, second auxiliary piston rod; 8, first luffing oil cylinder; 9, second steel wire rope; 10, tray; 20, third telescopic oil cylinder; 30, second base arm; 40, second section arm group; 50, support seat; 60, sliding block; 70, second luffing oil cylinder;

[0032] Figure 1 R1 in the formula (1) is a first direction; Figure 3 R2 in the formula (2) is a second direction; Figure 3 R3 in the formula (3) is a third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other; Figure 11 R4 in the formula (4) is a fourth direction; Figure 12 R5 in the formula (5) is a fifth direction; Figure 12 R6 in the formula (6) is a sixth direction; wherein the fourth direction, the fifth direction and the sixth direction are perpendicular to each other. DETAILED DESCRIPTION

[0033] With reference to the accompanying drawings, the related technical solutions will be clearly and completely described in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0034] Reference Figures 1 to 12 The telescopic arm for the working machine disclosed in the embodiment comprises a first base arm 1, a first section arm group 2 and a first telescopic cylinder 3.

[0035] The first base arm 1 can extend or retract the first section arm group 2 in a first direction, and the first telescopic cylinder 3 comprises a first cylinder barrel 31 and a first piston rod group, wherein the first cylinder barrel is movably supported in the first base arm, and the first piston rod group is telescopically arranged in the first cylinder barrel and connected with the first section arm group.

[0036] The first telescopic cylinder 3 is supported and connected on the first base arm 1 and the first section arm group 2 by the first cylinder barrel 31 and the first piston rod group respectively. When the telescopic arm hoists heavy objects, the first telescopic cylinder can bear the force and participate in the bending of the telescopic arm, thereby improving the carrying capacity of the telescopic arm.

[0037] It should be noted that the carrying capacity refers to the ability to bear greater weight without deformation or damage.

[0038] The working machine of the embodiment can be a crane or a hoist, and the telescopic arm not only has a high lifting height, but also can hoist heavy objects, meeting the working requirements of the working machine under telescopic conditions with load.

[0039] In an embodiment, the working machine comprises a base and a turntable, the turntable is arranged on the base, the turntable can rotate around a rotation center, and the telescopic arm can be arranged on the turntable. The telescopic arm can rotate with the turntable, thereby improving the working range of the working machine.

[0040] In an embodiment, please refer to Figures 7 to 9 The telescopic arm further comprises a connecting seat 4 and a first roller 5, one end of the connecting seat is connected to the first cylinder barrel 31, the other end of the connecting seat is arranged obliquely and rotatably connected with the first roller, and the first roller is rollably arranged in the first base arm 1.

[0041] For example, one end of the connecting seat 4 can be connected to the end of the first cylinder barrel 31 away from the first piston rod group in the first direction, and the other end of the connecting seat is arranged obliquely at an angle to the first direction and rotatably connected with the first roller 5.

[0042] By obliquely arranging the connecting seat 4, the first cylinder barrel 31 can be better supported. On the one hand, when the telescopic arm is stressed, the oblique arrangement makes the stress concentration position less, so that the connecting seat 4 and the first telescopic cylinder 3 can bear better force to hoist heavier objects and realize telescoping with load. On the other hand, when the first piston rod group is telescoped, the first cylinder barrel 31 can roll in the first base arm 1 through the first roller 5 because the first piston rod group is connected in the first section arm group 2. That is, the first telescopic cylinder 3 of the present application is arranged in an inverted manner.

[0043] In an embodiment, referring to Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 , the first piston rod group comprises a plurality of first piston rods 321, which are arranged in a nested manner in the first cylinder 31. The first joint arm group 2 comprises a plurality of first joint arms 21, which are arranged in a nested manner outside the first base arm 1.

[0044] The first cylinder 31 is provided with a first cylinder lug plate 311, each of the plurality of first piston rods 321 is provided with a first mounting lug plate 321a, the first joint arm closest to the first base arm 1 among the plurality of first joint arms 21 is the first main joint arm 211, the first main joint arm is provided with a first cylinder mounting seat 2111, and the first joint arms other than the first main joint arm are provided with first mounting seats 2112. The first cylinder lug plate is inserted into the first cylinder mounting seat, and each first mounting lug plate in the inner-outer direction is inserted into the corresponding first mounting seat.

[0045] For example, the first piston rod group can include two first piston rods 321, which are respectively a first main piston rod 3211 and a first auxiliary piston rod 3212, the first main piston rod is nested in the first cylinder 31, and the first auxiliary piston rod is nested in the first main piston rod.

[0046] The first joint arm group 2 can include three first joint arms 21, the first joint arm closest to the first base arm 1 among the three first joint arms is the first main joint arm 211, the other two first joint arms 21 among the three first joint arms are respectively a first auxiliary joint arm 213 and a first sub-joint arm 214, the first main joint arm is nested outside the first base arm, the first auxiliary joint arm is nested outside the first main joint arm, and the first sub-joint arm is nested outside the first auxiliary joint arm.

[0047] The first cylinder 31 is provided with a first cylinder lug plate 311 at one end thereof away from the first roller 5 in the first direction, the first main piston rod 3211 and the first auxiliary piston rod 3212 are each provided with a first mounting lug plate 321a at one end thereof away from the first cylinder in the first direction, the first main joint arm 211 is provided with a cylinder mounting seat at one end thereof away from the first roller in the first direction, and the first auxiliary joint arm 213 and the first sub-joint arm 214 are each provided with a first mounting seat 2112. The first cylinder lug plate 311 can be inserted into the first cylinder mounting seat 2111, the first mounting lug plate on the first main piston rod can be inserted into the first mounting seat in the first auxiliary joint arm, and the first mounting lug plate on the first auxiliary piston rod can be inserted into the first mounting seat in the first sub-joint arm.

[0048] Here, the first cylinder 31 is inserted into the first main section arm 211, and each first piston rod 321 is inserted into a corresponding first section arm 21, so that each stage of the first telescopic oil cylinder 3 can bear the force of the corresponding first section arm, further improving the load capacity of the telescopic arm.

[0049] In an embodiment, referring to Figure 5 and Figure 6 , the first cylinder 31 is provided with a first pulley 312, and the telescopic arm includes a first steel wire rope 6, one end of the first steel wire rope is fixed to the first base arm 1, and the other end of the first steel wire rope is fixed to the first section arm closest to the first main section arm 211 in the inner-outer direction among the plurality of first section arms 21 after being wound around the first pulley.

[0050] For example, the first cylinder 31 can be provided with a first pulley 312 on the side away from the first cylinder ear plate 311 in the first direction, and one end of the first steel wire rope 6 can be fixed to the end of the first base arm 1 away from the first roller 5 in the first direction, and the other end of the first steel wire rope can be fixed to the inner wall of the first secondary section arm 213 after being wound around the first roller in the first direction.

[0051] In this way, when the first main piston is extended, the first cylinder 31 is inserted into the first cylinder mounting seat 2111 through the first cylinder ear plate 311, the first main piston rod 3211 can push the first cylinder to move in the first direction, thereby driving the first main section arm 211 to move;

[0052] Since one end of the first steel wire rope 6 is fixed to the first base arm 1, and the other end of the first steel wire rope is fixed to the first secondary section arm 213, and the first cylinder 31 is in rolling connection with the first base arm through the first roller 5, the first steel wire rope can pull the first base arm to move in the first direction through the first pulley 312; the first base arm and the first main section arm 211 can be simultaneously extended.

[0053] In an embodiment, referring to Figure 2 and Figure 6 , the first mounting seat 2112 includes a first seat body 21121 and a first pressing plate 21122, the first seat body is formed with a first insertion slot 21121a, one end of the first insertion slot penetrating through the first seat body in the second direction is formed with a first insertion port, and one end of the first insertion slot penetrating through the first seat body in the third direction is formed with a first avoiding port.

[0054] The first mounting lug plate 321a comprises a first lug plate base body 321a1 and a first plug block 321a2. The first lug plate base body is sleeved on the outer periphery of the second piston rod 721. The first plug block is connected to the outer periphery of the first lug plate base body. The first plug block can be inserted into the first slot 21121a from the first socket. The first pressing plate 21122 is arranged on the first socket. Then, a fastener such as a bolt can be arranged on the first pressing plate and the first base body 21121 to improve the connection strength of the first pressing plate and the first base body, thereby preventing the first mounting lug plate from being separated from the first mounting seat 2112.

[0055] In this way, the force borne by the first telescopic oil cylinder 3 on the telescopic arm can be further increased, and the load-bearing capacity of the telescopic arm can be further enhanced.

[0056] In an embodiment, as shown in Figures 1 to 10 , the telescopic arm comprises a second telescopic oil cylinder 7. The second telescopic oil cylinder comprises a second cylinder barrel 71 and a second piston rod group. The second cylinder barrel is movably arranged on the first cylinder barrel 31. The second piston rod group is telescopically arranged in the second cylinder barrel. The first arm group 2 comprises a plurality of second arms 22. The plurality of second arms are arranged outside the outermost first arms in the plurality of first arms 21 in stages. The second piston rod group is used to drive the plurality of second arms to extend or retract.

[0057] For example, the second cylinder barrel 71 is movably arranged on the outer surface of the first cylinder barrel 31. The plurality of second piston rod groups are telescopically arranged in the second cylinder barrel. The first arm group 2 can comprise two second arms 22, which are a second main arm 221 and a second auxiliary arm 222. The second main arm is arranged outside the first sub-arm 214. The second auxiliary arm is arranged outside the second main arm. The second piston rod group can drive the second main arm to retract or extend the first sub-arm, and drive the second auxiliary arm to retract or extend the second main arm.

[0058] In this way, the extension length of the telescopic arm can be further prolonged, and the operation range of the telescopic arm can be further improved.

[0059] In an embodiment, as shown in Figure 2 and Figure 6 The inner walls of the outermost first arms 21 in the plurality of first arms 21 and the inner walls of the plurality of second arms 22 are provided with second mounting seats 22a. The second piston rod group comprises a plurality of second piston rods 721. The second cylinder barrel 71 and the plurality of second piston rods are provided with second mounting lug plates 711. Each second mounting lug plate is inserted into the corresponding second mounting seat in the inward and outward directions.

[0060] Exemplarily, the inner walls of the first sub-section arm 214, the second main-section arm 221 and the second sub-section arm 222 are each provided with a second mounting seat 22a. The second piston rod set can include two second piston rods 721, which are respectively a second main piston rod 7211 and a second sub-piston rod 7212. The second cylinder 71 is provided with a second mounting lug plate 711 at one end thereof away from the first roller 5 in the first direction. The second main piston rod and the second sub-piston rod are each formed with a second mounting lug plate at one end thereof away from the second cylinder in the first direction. The second mounting lug plate on the second main piston rod can be inserted into the second mounting seat in the second main-section arm, and the second mounting lug plate on the second sub-piston rod can be inserted into the second mounting seat in the second sub-section arm. The second mounting lug plate on the second cylinder can be inserted into the second mounting seat in the first sub-section arm.

[0061] Here, the first cylinder 31 is inserted into the first sub-section arm 214, and each second piston rod 721 is inserted into the corresponding second-section arm 22, so that each stage of the second telescopic oil cylinder 7 can bear the force of the corresponding second-section arm and the outermost first-section arm among the plurality of first-section arms 21; and the load-carrying capacity of the telescopic arm can be further improved.

[0062] In an embodiment, as shown in Figure 1 and Figure 5 , the telescopic arm includes a first luffing oil cylinder 8 which is telescopically supported between the second sub-section arm 222 and the rotating platform.

[0063] Exemplarily, the cylinder of the first luffing oil cylinder 8 can be rotatably connected to the rotating platform, and the telescopic rod of the first luffing oil cylinder 8 can be rotatably connected to the second sub-section arm 222.

[0064] In this way, the angle between the first-section arm group 2 and the rotating platform can be adjusted through the telescoping of the second sub-section 3, and the working range and flexibility of the telescopic arm can be further improved.

[0065] In an embodiment, as shown in Figure 2 and Figure 6 , the second mounting seat 22a includes a second seat body 22a1 and a second pressing plate 22a2. The second seat body is formed with a second insertion slot 22a11. One end of the second insertion slot is formed with a second insertion opening in the second direction, and the other end of the second insertion slot is formed with a second avoiding opening in the third direction. The second pressing plate is used to cover the second insertion opening.

[0066] The second mounting lug plate 711 includes a second lug plate seat body 7111 and a second insertion block 7112. The second lug plate seat body is sleeved on the outer periphery of the second piston rod 721, and the second insertion block is connected to the outer periphery of the second lug plate seat body. The second insertion block can be inserted into the second insertion slot 22a11 from the second insertion opening.

[0067] Exemplarily, the outer periphery of the second cylinder 71 and the outer periphery of each second piston rod 721 are sleeved with a second lug seat body 7111, a second plug 7112 is connected to the second lug seat body, the second plug can be inserted into the second slot 22a11 from the second insertion opening, and the second pressing plate 22a2 covers the second insertion opening.

[0068] In this way, the force of the second telescopic oil cylinder 7 on the telescopic arm can be further increased, and the load bearing capacity of the telescopic arm can be enhanced.

[0069] In an embodiment, a fastener such as a bolt can be inserted through the second pressing plate 22a2 and the second seat body 22a1 to improve the connection strength of the second pressing plate 22a2 and the second seat body 22a1, and to prevent the second mounting lug 711 from being separated from the second mounting seat 22a.

[0070] In this way, the force of the second telescopic oil cylinder 7 on the telescopic arm can be further increased, and the load bearing capacity of the telescopic arm can be enhanced.

[0071] In an embodiment, referring to Figure 6 , the side walls of the two ends of the second slot 22a11 along the first direction are respectively a first wall and a second wall, and the size of the first wall along the second direction is smaller than the size of the second wall along the second direction. That is, the second wall is higher than the first wall along the second direction, so that the second seat body 22a1 is substantially in the shape of a "hook".

[0072] The second pressing plate 22a2 includes a first plate 22a21, a connecting plate 22a22, and a second plate 22a23, the first plate and the second plate are respectively arranged at the two ends of the connecting plate along the first direction, and the first plate and the second plate both extend along the second direction to define a buckle slot; the size of the first plate along the second direction is smaller than the size of the second plate along the second direction. That is, the first plate is lower than the second plate along the second direction, so that the second pressing plate is substantially in the shape of a "hook", and the buckle slot is located inside the "hook".

[0073] In the state that the second pressing plate 22a2 covers the second slot 22a11, the first plate 22a21 is supported at one end of the first wall along the second direction, and one end of the second wall along the second direction abuts in the buckle slot.

[0074] It should be noted that after the first telescopic oil cylinder 3 is installed to the telescopic arm, the space is limited when the second telescopic oil cylinder 7 is installed. Therefore, when the second telescopic oil cylinder 7 is installed, the second plug 7112 can be inserted into the second insertion opening from the first wall to the second wall along the first direction. Since the first wall is lower than the second wall along the second direction, the second plug can be guided into the second insertion opening and inserted into the second slot 22a11. Moreover, since the second wall is higher than the first wall along the second direction, the second plug can be blocked in the first direction during the insertion process, so as to reduce the alignment difficulty of the insertion.

[0075] In an embodiment, referring toFigure 3 、 Figure 5 and Figure 6 , the second pulley 2113 is arranged in the first main link arm 211, the telescopic arm includes the second steel wire rope 9, one end of the second steel wire rope is fixed to the first base arm 1 away from one end of the second pulley in the first direction, and the other end of the second steel wire rope is wound on the second pulley.

[0076] Here, when the first main piston rod 3211 is retracted, the first cylinder barrel 31 is inserted into the first cylinder barrel mounting seat 2111 through the first cylinder barrel ear plate 311, and the first telescopic oil cylinder 3 adopts an upside-down mode; therefore, the first cylinder barrel can move relative to the first main piston rod 3211 in the first direction, thereby driving the first main link arm 211 to move;

[0077] And since one end of the second steel wire rope 9 is fixed to the first base arm 1 away from one end of the second pulley 2113 in the first direction, and the other end of the second steel wire rope is wound on the second pulley in the first main link arm 211; in this way, the second steel wire rope can pull the first base arm 1 to move together, so that the first base arm and the first main link arm can be retracted at the same time.

[0078] In an embodiment, please refer to Figure 3 、 Figure 5 and Figure 6 , the first cylinder barrel mounting seat 2111 is located on one side of the second pulley 2113 in the second direction.

[0079] For example, the first cylinder barrel mounting seat 2111 can be arranged on the side of the second pulley 2113 close to the second telescopic oil cylinder 7 in the second direction.

[0080] In this way, the first cylinder barrel mounting seat can be used as a rope blocking piece of the second pulley, reducing the possibility of the second steel wire rope coming off the pulley, and having good working stability, compact structure, and being suitable for narrow installation space.

[0081] In an embodiment, please refer to Figure 3 、 Figure 5 and Figure 6 , the first cylinder barrel ear plate 311 includes a first cylinder barrel ear plate body 3111 and two first cylinder barrel insertion blocks 3112, the number of the first cylinder barrel mounting seats 2111 is two, the two first cylinder barrel ear plate bodies are arranged on the inner wall of the first main link arm 211 in the third direction, the first cylinder barrel ear plate body is sleeved on the outer periphery of the first cylinder barrel 31, and the two first cylinder barrel insertion blocks are arranged on the outer periphery of the first cylinder barrel ear plate body in the third direction, each first cylinder barrel insertion block is inserted into the corresponding first cylinder barrel ear plate body.

[0082] Exemplarily, the first cylinder mounting seat 2111 comprises a first cylinder seat body 21111 and a first cylinder pressing plate 21112, the first cylinder seat body is formed with a first cylinder slot 21111a, the first cylinder slot is formed with a first cylinder insertion opening at one end of the first cylinder seat body along the second direction, and the first cylinder slot is formed with a first cylinder avoiding opening at one end of the first cylinder seat body along the third direction;

[0083] The first cylinder insertion block 3112 is connected to the outer periphery of the first cylinder lug plate seat body 3111, the first cylinder insertion block can be inserted into the first cylinder slot 21111a from the first cylinder insertion opening, and the first cylinder pressing plate 21112 is arranged on the first cylinder insertion opening, and then a fastener such as a bolt can be arranged through the first cylinder pressing plate and the first cylinder seat body 21111 to improve the connection strength of the first cylinder pressing plate 21112 and the first cylinder seat body 21111, so as to prevent the first cylinder lug plate 311 from being separated from the first cylinder mounting seat 2111.

[0084] In this way, the force borne by the first telescopic oil cylinder 3 on the telescopic arm can be further increased, and the load bearing capacity of the telescopic arm can be enhanced.

[0085] In an embodiment, as shown in Figure 3 , the connecting line of the two first cylinder insertion blocks 3112 along the third direction is located on one side of the central axis of the first cylinder 31 along the second direction.

[0086] That is, the connecting line of the two first cylinder insertion blocks 3112 along the third direction does not pass through the central axis of the first cylinder 31, but is located on one side of the first cylinder along the second direction.

[0087] In this way, the second pulley 2113 can be avoided, the structure is compact, and the installation in a narrow space is suitable.

[0088] In an embodiment, as shown in Figure 3 and Figure 4 , the second pulley 2113 comprises a first wheel body 21131 and a second wheel body 21132, the second wheel body is located at one end of the first wheel body close to the inner wall of the first main link arm 211 along the third direction to define a winding groove, the second steel wire rope 9 is wound in the winding groove, and the diameter of the first wheel body is greater than the diameter of the second wheel body.

[0089] In this way, after the second steel wire rope 9 is wound in the winding groove, because the second wheel body 21132 is close to the inner wall of the first main link arm 211 along the third direction, the situation that the second steel wire rope escapes from the winding groove from one side of the second wheel body can be reduced; and because the diameter of the first wheel body 21131 is greater than the diameter of the second wheel body, it is also difficult for the second steel wire rope to escape from the winding groove from one side of the first wheel body 21131, and the working stability is good.

[0090] In an embodiment, as shown in Figure 9, the telescopic arm comprises a tray 10 provided on the first cylinder 31, the tray is formed with a guide groove extending in the first direction, and the second cylinder 71 is provided with a second roller 712 which is rollably arranged in the guide groove.

[0091] In this way, by arranging the tray 10 and the second roller 712, the tray is formed with the guide groove. On the one hand, the guide groove can provide a smooth and accurate movement path, and the second roller can easily slide in the guide groove, so as to reduce the impact in the movement process and make the movement process of the second telescopic oil cylinder 7 more accurate and controllable; on the other hand, the guide groove can provide additional support and stability, so as to reduce the shaking or unstable sliding of the second roller in the movement process and make the movement stable.

[0092] In an embodiment, the tray 10 can be arranged on the first cylinder 31 through a clamp, so that the stability of the movement of the second telescopic oil cylinder 7 is good.

[0093] In an embodiment, please refer to Figure 2 The first sub-arm 21 closest to the first main arm 211 in the inner-outer direction is provided with a receiving block 2131, and the other end of the first steel wire rope 6 is fixed on the receiving block after being wound around the first pulley 312, and the second cylinder 71 is supported on the receiving block.

[0094] For example, the receiving block 2131 can be arranged in the first sub-arm 213, the receiving block is formed with a receiving groove, the other end of the first steel wire rope 6 is fixed on the receiving block after being wound around the first pulley 312, and the second cylinder 71 is supported in the receiving groove.

[0095] In this way, when the second main piston rod 7211 and the second sub-piston rod 7212 are both extended, the second cylinder 71 can be supported by the second roller 712 and the receiving block 2131.

[0096] In an embodiment, please refer to Figures 11 to 12 The telescopic arm comprises a third telescopic oil cylinder 20, a second base arm 30 and a second arm group 40, the second base arm is rotatably connected with the first base arm 1, the second arm group is telescopically arranged in the second base arm, the third telescopic oil cylinder comprises a third cylinder and a third piston rod, the third piston rod is telescopically arranged in the third cylinder, one end of the third cylinder is fixedly connected with the second base arm, and one end of the third piston rod is supported and arranged on the inner wall of the second arm group.

[0097] In this way, by rotatably connecting the second base arm 30 with the first base arm 1, the second base arm and the first base arm can be folded. That is, the telescopic arm can be folded into two sections, one section is composed of the first arm group and the first base arm, and the other section is composed of the second arm group 40 and the second base arm, so as to facilitate transportation and placement.

[0098] The second section arm group 40 is telescopically arranged in the second base arm 30, and the third piston rod is telescopically arranged in the third cylinder, one end of the third cylinder is fixedly connected with the second base arm, and one end of the third piston rod is supported and arranged on the inner wall of the second section arm group. On the one hand, the second section arm group can be telescopically extended or retracted in the second base arm, and the working range of the telescopic arm can be further improved. On the other hand, by fixing one end of the third cylinder to the second base arm and supporting one end of the third piston rod on the inner wall of the second section arm group, the third telescopic oil cylinder 20 can participate in the force bearing of the second base arm and the second section arm group, and the carrying capacity of the telescopic arm is further improved.

[0099] In an embodiment, as shown in Figure 12 , the telescopic direction of the second section arm group 40 is the fourth direction, the telescopic arm comprises a support seat 50 and a plurality of sliding blocks 60, the support seat is sleeved on the outer periphery of the third piston rod, and at least two of the plurality of sliding blocks are arranged on both ends of the support seat along the fifth direction, and at least two of the plurality of sliding blocks are arranged on both ends of the support seat along the sixth direction.

[0100] For example, the support seat 50 can be sleeved on one end of the third piston rod away from the third cylinder along the fourth direction; the number of sliding blocks 60 can be four, and two of the four sliding blocks can be arranged on the two end faces of the support seat along the fifth direction, respectively, and the other two of the four sliding blocks can be arranged on the two end faces of the support seat along the sixth direction, respectively.

[0101] In this way, the third piston rod can be supported by the plurality of sliding blocks 60 along the fifth direction and the sixth direction to contact the wall surface in the second section arm group 40, so that the third telescopic oil cylinder 20 participates in the force bearing of the second base arm 30 and the second section arm group 40, deforms together with the second section arm group 40 and the second base arm 30, and the carrying capacity of the telescopic arm is further improved, and the operation is stable.

[0102] In an embodiment, as shown in Figure 12 , the size of the second section arm group 40 along the fifth direction is greater than the size along the sixth direction, so that the cross section of the second section arm group 40 along the fourth direction is composed of a rectangle and a semicircle.

[0103] In this way, when installing, a 45° rotating installation mode can be used for installation to improve the installation efficiency.

[0104] In an embodiment, the second section arm group can also be installed in a 90° rotating mode to improve the installation efficiency.

[0105] In an embodiment, as shown in Figure 11The telescopic arm comprises a second luffing oil cylinder 70, a cylinder barrel of the second luffing oil cylinder is rotatably arranged on the first base arm 1, a telescopic rod of the second luffing oil cylinder is rotatably arranged on the second base arm 30, and the angle between the first base arm and the second base arm is adjusted through the telescoping of the second luffing oil cylinder, so that stepless adjustment is realized.

[0106] In this way, not only the operation range and flexibility of the telescopic arm are further improved, but also the adjustment of the angle is accurately realized.

[0107] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although in the foregoing detailed description with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or the equivalent replacement of part of the technical features described in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A telescoping arm for use on a work machine, characterized by: It includes a first base arm, a first section arm group and a first telescopic oil cylinder; the first section arm group is telescopically arranged outside the first base arm; the first telescopic oil cylinder includes a first cylinder barrel and a first piston rod group, the first cylinder barrel is movably supported in the first base arm, and the first piston rod group is telescopically arranged in the first cylinder barrel and connected with the first section arm group; The telescopic arm includes a connecting seat and a first roller, one end of the connecting seat is connected to the first cylinder barrel, the other end of the connecting seat is obliquely arranged and rotatably connected with the first roller, and the first roller is rollably arranged in the first base arm; The first piston rod group includes a plurality of first piston rods, the plurality of first piston rods are arranged in the first cylinder barrel in a nested manner, the first section arm group includes a plurality of first section arms, the plurality of first section arms are arranged outside the first base arm in a nested manner, the first cylinder barrel is provided with a first cylinder barrel ear plate, the plurality of first piston rods are each provided with a first mounting ear plate, a first section arm closest to the first base arm in the inner-outer direction among the plurality of first section arms is a first main section arm, the first main section arm is provided with a first cylinder barrel mounting seat, the remaining first section arms except the first main section arm among the plurality of first section arms are each provided with a first mounting seat, the first cylinder barrel ear plate is inserted into the first cylinder barrel mounting seat, and each first mounting ear plate in the inner-outer direction is inserted into a corresponding first mounting seat; the telescopic direction of the first section arm group is a first direction, the first cylinder barrel is provided with a first pulley, the telescopic arm includes a first steel wire rope, one end of the first steel wire rope is fixed to the first base arm, the other end of the first steel wire rope is wound around the first pulley and fixed to a first section arm closest to the first main section arm among the plurality of first section arms in the inner-outer direction; The telescopic arm includes a second telescopic oil cylinder, the second telescopic oil cylinder includes a second cylinder barrel and a second piston rod group, the second cylinder barrel is movably arranged on the first cylinder barrel, and the second piston rod group is telescopically arranged in the second cylinder barrel, the first section arm group includes a plurality of second section arms, the plurality of second section arms are arranged outside a first section arm in the outermost layer among the plurality of first section arms in a nested manner, and the second piston rod group is used to drive the plurality of second section arms to extend or retract; The inner wall of the outermost first segment arm of the plurality of first segment arms and the inner wall of the plurality of second segment arms are provided with second mounting seats, the second piston rod group comprises a plurality of second piston rods, the second cylinder and the plurality of second piston rods are provided with second mounting lugs, and each second mounting lug along the inner-outer direction is inserted into the corresponding second mounting seat.

2. A telescoping arm for use on a work machine as set forth in claim 1, characterized in that: The second mounting seat comprises a second seat body and a second pressing plate, the second seat body is formed with a second slot, the second slot is formed with a second insertion opening at one end of the second seat body along the second direction, the second slot is formed with a second avoiding opening at one end of the second seat body along the third direction, and the second pressing plate is used for covering the second insertion opening. The second mounting lug comprises a second lug seat body and a second insertion block, the second lug seat body is sleeved on the outer periphery of the second piston rod, and the second insertion block is connected to the outer periphery of the second lug seat body. The second insertion block can be inserted into the second slot from the second insertion opening, wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. A telescoping arm for use on a work machine as set forth in claim 2, characterized in that: The side walls of the two ends of the second slot along the first direction are respectively a first wall and a second wall, the size of the first wall along the second direction is smaller than the size of the second wall along the second direction.

4. A telescoping arm for use on a work machine as set forth in claim 2, wherein: The second pressing plate comprises a first plate, a connecting plate and a second plate, the first plate and the second plate are respectively arranged at the two ends of the connecting plate along the first direction, the first plate and the second plate both extend along the second direction to define a buckle groove, and the size of the first plate along the second direction is smaller than the size of the second plate along the second direction.

5. The telescoping arm for use on a work machine of claim 1, wherein: In the state that the second pressing plate covers the second slot, the first plate is supported at one end of the first wall along the second direction, and one end of the second wall along the second direction abuts in the buckle groove. The telescopic direction of the first segment arm group is the first direction, the first main segment arm is provided with a second pulley inside, the telescopic arm comprises a second steel wire rope, one end of the second steel wire rope is fixedly connected to one end of the first base arm away from the second pulley along the first direction, and the other end of the second steel wire rope is wound on the second pulley. The first cylinder mounting seat is located on one side of the second pulley along the second direction. The first cylinder lug plate comprises a first cylinder lug plate seat body and two first cylinder insertion blocks, the number of the first cylinder mounting seats is two, the first cylinder lug plate seat body is arranged on the inner wall of the first main segment arm along the third direction, the first cylinder lug plate seat body is sleeved on the outer periphery of the first cylinder, and the two first cylinder insertion blocks are arranged on the outer periphery of the first cylinder lug plate seat body along the third direction. Each first cylinder insertion block is inserted into the corresponding first cylinder lug plate seat body. The connecting line of the two first cylinder insertion blocks along the third direction is located on one side of the center axis of the first cylinder along the second direction. The second pulley comprises a first wheel body and a second wheel body, the second wheel body is located at one end of the first wheel body close to the inner wall of the first main segment arm along the third direction to define a winding groove, the second steel wire rope is wound in the winding groove, and the diameter of the first wheel body is greater than the diameter of the second wheel body. The telescopic arm comprises a tray, the tray is arranged on the first cylinder, the tray is formed with a guide groove extending along the first direction, the second cylinder is provided with a second roller, and the second roller is rollably arranged in the guide groove. The first section arm closest to the first main section arm in the inner-outer direction among the plurality of first section arms is internally provided with a receiving block, the other end of the first steel wire rope is fixed to the receiving block after winding around the first pulley, and the second cylinder is supported on the receiving block.

6. The telescoping arm for use on a work machine of claim 1, wherein: The telescopic arm comprises a third telescopic oil cylinder, a second base arm and a second section arm group, the second base arm is rotatably connected with the first base arm, the second section arm group is telescopically arranged in the second base arm, the third telescopic oil cylinder comprises a third cylinder barrel and a third piston rod, the third piston rod is telescopically arranged in the third cylinder barrel, one end of the third cylinder barrel is fixedly connected to the second base arm, and one end of the third piston rod is supported and arranged on the inner wall of the second section arm group. The telescopic direction of the second section arm group is a fourth direction, the telescopic arm comprises a support seat and a plurality of sliding blocks, the support seat is sleeved on the outer periphery of the third piston rod, at least two of the plurality of sliding blocks are arranged at both ends of the support seat in a fifth direction, and at least two of the plurality of sliding blocks are arranged at both ends of the support seat in a sixth direction, wherein the fourth direction, the fifth direction and the sixth direction are perpendicular to each other.

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