Telescopic arm for operation machinery

Abstract

The invention discloses a telescopic arm for an operation machine. The telescopic arm comprises a first basic arm, a first section arm group and a first telescopic oil cylinder, the first section arm group is telescopically arranged outside the first basic 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 basic arm, and the first piston rod group is telescopically arranged in the first cylinder barrel and is connected with the first section arm group. According to the invention, the first cylinder barrel and the first piston rod group are respectively supported and connected to the first basic arm and the first section arm group, so that when the telescopic arm hoists a heavy object, the first telescopic oil cylinder can bear acting force and can participate in bending of the telescopic arm; the lifting height is high, heavy objects can be lifted, the bearing capacity is good, and the on-load telescopic requirement of operation machinery is met.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering machinery, and in particular relates to a telescopic arm used on an operating machinery. Background Art

[0002] Working machines, such as cranes and hoists, are widely used in many fields such as construction, bridges, electricity, ports, etc. to lift and move heavy objects. In these working machines, telescopic arms are key components, and their performance directly affects the operating efficiency and safety of the machinery. Traditional telescopic arms are usually composed of multiple arms that are extended and retracted through hydraulic cylinders to achieve different length adjustments to meet different working requirements.

[0003] Telescopic arms in the prior art mostly use hydraulic cylinders to achieve telescopic movements by extending or retracting. However, these telescopic cylinders usually only play the role of pushing or pulling the arm sections during the force-bearing process of the telescopic arms, and fail to effectively participate in the bending structure design of the telescopic arms. This design causes the telescopic arms to rely mainly on the structural strength of the arm sections themselves to withstand bending stress when hoisting heavy objects, ignoring the auxiliary role of the hydraulic cylinders during the force-bearing process. Therefore, when hoisting heavier objects, the existing telescopic arms have limited carrying capacity and are easily deformed or damaged due to excessive force, affecting the safety and stability of the operation.

[0004] In addition, as the application scenarios of operating machinery become increasingly complex, higher requirements are placed on the operating range and load-bearing capacity of telescopic arms. Existing telescopic arms are difficult to design with both high lifting height and large load capacity, which makes it impossible to meet diverse needs in actual operations. This not only limits the application scope of operating machinery, but also increases safety hazards during operation. Summary of the invention

[0005] The object of the present invention is to provide a telescopic arm with good load-bearing capacity for use on a working machine.

[0006] The telescopic arm for use on an operating machine provided by the present invention comprises a first base arm, a first arm section group and a first telescopic cylinder; the first arm section group is telescopically arranged outside the first base arm; the first telescopic 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 is connected to the first arm section group.

[0007] In one embodiment of the above-mentioned 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, the other end of the connecting seat is inclined and rotatably connected to the first roller, and the first roller is rotatably set in the first base arm.

[0008] In one embodiment of the telescopic arm, the first piston rod group includes a plurality of first piston rods, which are nested in the first cylinder in stages, the first section arm group includes a plurality of first section arms, which are nested in the outside of the first base arm in stages, the first cylinder is provided with a first cylinder ear plate, and the plurality of first piston rods are all provided with a first mounting ear plate. The first section arm closest to the first base arm in the inner-outer direction among the plurality of first section arms is the first main section arm, the first main section arm is provided with a first cylinder mounting seat, and the remaining first section arms except the first main section arm among the plurality of first section arms are all provided with a first mounting seat, the first cylinder ear plate is inserted in the first cylinder mounting seat, and each first mounting ear plate in the inner-outer direction is inserted in the corresponding first mounting seat; the telescopic direction of the first section arm group is the first direction, the first cylinder is provided with a first pulley, and the telescopic arm includes a first steel wire rope, one end of the first steel wire rope is fixed to the first base arm, and the other end of the first steel wire rope is wound around the first pulley and fixed to the first section arm closest to the first main section arm in the inner-outer direction among the plurality of first section arms.

[0009] In one embodiment of the above-mentioned telescopic arm, 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, 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 nested in stages on the outside of the outermost first section arm among the plurality of first section arms, and the second piston rod group is used to drive the plurality of second section arms to extend or retract.

[0010] In one embodiment of the above-mentioned telescopic arm, the inner wall of the outermost first section arm among the plurality of first section arms and the inner wall of the plurality of second section arms are both provided with a second mounting seat, the second piston rod group includes a plurality of second piston rods, the second cylinder and the plurality of second piston rods are both provided with a second mounting ear plate, and each second mounting ear plate along the inner and outer directions is inserted into the corresponding second mounting seat; the second mounting seat includes a second seat body and a second pressure plate, the second seat body is formed with a second slot, the second slot passes through one end of the second seat body along the second direction to form a second socket, the second slot passes through one end of the second seat body along the third direction to form a second avoidance opening, and the second pressure plate is used to cover the second socket; the second mounting ear plate includes a second ear plate seat body and a second plug block, the second ear plate seat body is sleeved on the outer periphery of the second piston rod The second plug block is connected to the outer periphery of the second ear plate seat body, and the second plug block can be inserted into the second slot from the second socket, wherein the first direction, the second direction and the third direction are perpendicular to each other; the side walls of the second slot at both ends along the first direction are respectively the first wall and the 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; the second pressure 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, 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; when the second pressure plate is covered in 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 against the buckle groove.

[0011] In one embodiment of the above-mentioned telescopic arm, the telescopic direction of the first arm group is the first direction, a second pulley is arranged in the first main arm, and the telescopic arm includes a second steel wire rope, one end of the second steel wire rope is fixedly connected to an 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 around the second pulley; the first cylinder mounting seat is located on one side of the second pulley along the second direction; the first cylinder ear plate includes a first cylinder ear plate seat body and two first cylinder plug blocks, the number of the first cylinder mounting seats is two, the two first cylinder ear plate seat bodies are arranged at intervals on the inner wall of the first main arm along the third direction, the first cylinder ear plate seat body is sleeved on the outer periphery of the first cylinder, and the two first cylinder plug blocks are arranged on the outer periphery of the first cylinder ear plate seat body along the third direction, and each first cylinder plug block is inserted in the corresponding first cylinder ear plate seat body.

[0012] In one embodiment of the telescopic arm, a connection line of the two first cylinder inserts along the third direction is located on one side of a central axis of the first cylinder along the second direction.

[0013] In one embodiment of the above-mentioned telescopic arm, the second pulley includes a first wheel body and a second wheel body, the second wheel body is located at one end of the first wheel body along the third direction close to the inner wall of the first main section arm 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.

[0014] In one embodiment of the above-mentioned telescopic arm, the telescopic arm includes a tray, which is arranged on the first cylinder, and the tray is formed with a guide groove extending along the first direction, and the second cylinder is provided with a second roller, and the second roller can be rotatably arranged in the guide groove; a receiving block is arranged in the first section arm closest to the first main section arm in the inner and outer directions among the multiple first section arms, and the other end of the first steel wire rope is wound around the first pulley and then fixed on the receiving block, and the second cylinder is supported on the receiving block.

[0015] In one embodiment of the above-mentioned telescopic arm, the telescopic arm includes a third telescopic cylinder, a second base arm and a second arm group, the second base arm is rotatably connected to the first base arm, the second arm group is telescopically arranged in the second base arm, the third telescopic cylinder includes 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 on the inner wall of the second arm group; the telescopic direction of the second arm group is a fourth direction, the telescopic arm includes a support seat and a plurality of sliders, the support seat is sleeved on the outer periphery of the third piston rod, at least two of the plurality of sliders are arranged at both ends of the support seat along a fifth direction, and at least two of the plurality of sliders are arranged at both ends of the support seat along 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 invention are:

[0017] The first cylinder and the first piston rod group are respectively supported and connected to the first base arm and the first section arm group. When the telescopic arm hoists heavy objects, the first telescopic oil cylinder can withstand the force and participate in the bending of the telescopic arm. It not only has a high lifting height, but also can hoist heavier objects, has good carrying capacity, and meets the load-bearing telescopic requirements of the operating machinery. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0020] Figure 3 for Figure 1 A cross-sectional diagram from another perspective;

[0021] Figure 4 for Figure 3 The enlarged view of point B in FIG.

[0022] Figure 5 A schematic structural diagram of a first base arm, a first boom assembly, a first steel wire rope, a second steel wire rope and a first luffing cylinder provided in another embodiment of the present application;

[0023] Figure 6 for Figure 5 The enlarged view of point C in FIG.

[0024] Figure 7 A cross-sectional schematic diagram of a first telescopic oil cylinder and a second telescopic oil cylinder provided in yet another embodiment of the present application;

[0025] Figure 8 A cross-sectional schematic diagram of a first telescopic oil cylinder and a second telescopic oil cylinder provided in yet another embodiment of the present application;

[0026] Fig. 9 A schematic structural diagram of a first telescopic oil cylinder and a pallet provided in yet another embodiment of the present application;

[0027] Fig.10 A schematic structural diagram of a first base boom, a first boom section, a first telescopic cylinder, a second telescopic cylinder and a first luffing cylinder provided for another embodiment of the present application, wherein the first boom section is in an extended state;

[0028] Fig.11 A schematic structural diagram of a second base arm, a second boom assembly and a second luffing cylinder provided in another embodiment of the present application, wherein the second boom assembly extends out of the second base arm;

[0029] Fig.12 for Fig.11 A cross-sectional diagram from another perspective.

[0030] Reference numerals:

[0031] 1. First basic arm; 2. First arm group; 21. First arm; 211. First main arm; 2111. First cylinder mounting seat; 21111. First cylinder seat body; 21111a. First cylinder slot; 21112. First cylinder pressure plate; 2112. First mounting seat; 21121. First seat body; 21121a. First slot; 21122. First pressure plate; 2113. Second pulley; 21131. First wheel body; 21132, second wheel body; 213, first sub-section arm; 2131, receiving block; 214, first sub-section arm; 22, second section arm; 22a, second mounting seat; 22a1, second seat body; 22a11, second slot; 22a2, second pressing plate; 22a21, first plate; 22a22, connecting plate; 22a23, second plate; 221, second main section arm; 222, second sub-section arm; 3, first telescopic oil cylinder; 31, first Cylinder; 311, first cylinder ear plate; 3111, first cylinder ear plate seat; 3112, first cylinder plug block; 312, first pulley; 321, first piston rod; 321a, first mounting ear plate; 321a1, first ear plate seat; 321a2, first plug 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, first Second cylinder; 711, second mounting ear plate; 7111, second ear plate seat; 7112, second plug block; 712, second roller; 721, second piston rod; 7211, second main piston rod; 7212, second auxiliary piston rod; 8, first luffing cylinder; 9, second steel wire rope; 10, tray; 20, third telescopic cylinder; 30, second base arm; 40, second arm group; 50, support seat; 60, slider; 70, second luffing cylinder;

[0032] Figure 1 R1 in is the first direction; Figure 3 R2 in is the second direction; Figure 3 R3 in the figure is the third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other; Fig.11 R4 in is the fourth direction; Fig.12 R5 in is the fifth direction; Fig.12 R6 is the sixth direction; wherein the fourth direction, the fifth direction and the sixth direction are perpendicular to each other. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technical solutions. Obviously, the described embodiments are only part of the embodiments, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0035] The first base arm 1 can extend or retract the first arm group 2 along the first direction, and the first telescopic cylinder 3 includes 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 to the first arm group.

[0036] The first telescopic oil cylinder 3 is supported and connected to the first base arm 1 and the first section arm group 2 through the first cylinder barrel 31 and the first piston rod group. When the telescopic arm is lifting heavy objects, the first telescopic oil cylinder can withstand 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 load-bearing capacity refers to the ability to withstand greater weight without deformation or damage.

[0038] The operating machine of this embodiment may be a crane or a hoist. The telescopic arm not only has a high lifting height, but can also lift heavier objects, thus meeting the operating requirements of the operating machine under load-bearing telescopic conditions.

[0039] In one embodiment, the working machine includes a base and a turntable, the turntable is arranged on the base, the turntable can rotate along a rotation center, and the telescopic arm can be arranged on the turntable. The telescopic arm can rotate with the turntable to increase the working range of the working machine.

[0040] In one embodiment, please refer to Figures 7 to 9 The telescopic arm also includes a connecting seat 4 and a first roller 5. One end of the connecting seat is connected to the first cylinder 31, and the other end of the connecting seat is tilted and rotatably connected to the first roller. The first roller is rotatably arranged in the first base arm 1.

[0041] Exemplarily, one end of the connecting seat 4 can be connected to one end of the first cylinder 31 away from the first piston rod group along the first direction, and the other end of the connecting seat is inclined at an angle to the first direction and is rotatably connected to the first roller 5.

[0042] The first cylinder 31 can be better supported by the inclined setting of the connecting seat 4. On the one hand, when the telescopic arm is subjected to force, due to its inclined setting, there are fewer stress concentration locations, so that the connecting seat 4 and the first telescopic oil cylinder 3 can withstand better forces, so as to hoist heavier objects and achieve telescopic operation with load. On the other hand, when the first piston rod group is telescoped, since the first piston rod group is connected to the first section arm group 2, the first cylinder 31 can roll in the first base arm 1 through the first roller 5. In other words, the first telescopic oil cylinder 3 of the present application adopts an inverted setting.

[0043] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 The first piston rod group includes a plurality of first piston rods 321, which are nested step by step in the first cylinder 31. The first section arm group 2 includes a plurality of first section arms 21, which are nested step by step on the outside of the first base arm 1.

[0044] The first cylinder 31 is provided with a first cylinder ear plate 311, and the multiple first piston rods 321 are all provided with a first mounting ear plate 321a. The first section arm 21 that is closest to the first base arm 1 along the inner and outer directions is the first main section arm 211, and the first main section arm is provided with a first cylinder mounting seat 2111. The other first section arms except the first main section arm are all provided with a first mounting seat 2112. The first cylinder ear plate is inserted in the first cylinder mounting seat, and each first mounting ear plate along the inner and outer directions is inserted in the corresponding first mounting seat.

[0045] Exemplarily, the first piston rod assembly may include two first piston rods 321 , which are respectively a first main piston rod 3211 and a first secondary piston rod 3212 . The first main piston rod is nested in the first cylinder 31 , and the first secondary piston rod is nested in the first main piston rod.

[0046] The first section arm group 2 may include three first section arms 21, the first section arm closest to the first base arm 1 in the inner and outer directions among the three first section arms is the first main section arm 211, the other two first section arms 21 among the three first section arms are the first sub-section arm 213 and the first sub-section arm 214 respectively, the first main section arm is nested on the outside of the first base arm, the first sub-section arm is nested on the outside of the first main section arm, and the first sub-section arm is nested on the outside of the first sub-section arm.

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

[0048] Here, the first cylinder 31 is inserted in the first main arm 211, and each first piston rod 321 is inserted in the corresponding first arm 21, so that each level of the first telescopic cylinder 3 can withstand the force of the corresponding first arm, which can further improve the carrying capacity of the telescopic arm.

[0049] In one embodiment, please refer 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 on the first base arm 1, and the other end of the first steel wire rope is wound around the first pulley and fixed on the first section arm 21 that is closest to the first main section arm 211 in the inner and outer directions among the multiple first section arms 21.

[0050] Exemplarily, a first pulley 312 may be provided on one side of the first cylinder 31 away from the first cylinder ear plate 311 along the first direction, one end of the first steel wire rope 6 may be fixed to one end of the first base arm 1 away from the first roller 5 along the first direction, and the other end of the first steel wire rope is wound around the first roller along the first direction and then fixed to the inner wall of the first sub-section arm 213.

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

[0052] Since one end of the first steel wire rope 6 is fixed on the first base arm 1, the other end of the first steel wire rope is fixed on the first sub-section arm 213, and the first cylinder 31 is rollingly connected to the first base arm through the first roller 5; the first steel wire rope can pull the first base arm to move along the first direction through the first pulley 312; the first base arm and the first main section arm 211 can be extended at the same time.

[0053] In one embodiment, please refer to Figure 2 and Figure 6 The first mounting seat 2112 includes a first seat body 21121 and a first pressure plate 21122. The first seat body is formed with a first slot 21121a. The first slot penetrates through one end of the first seat body along the second direction to form a first socket. The first slot penetrates through one end of the first seat body along the third direction to form a first avoidance opening.

[0054] The first mounting ear plate 321a includes a first ear plate seat body 321a1 and a first plug block 321a2, the first ear plate seat 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 ear plate seat body, the first plug block can be inserted into the first slot 21121a from the first socket, the first pressure plate 21122 is covered on the first socket, and then fasteners such as bolts can be passed through the first pressure plate and the first seat body 21121 to improve the connection strength between the first pressure plate and the first seat body to prevent the first mounting ear plate from detaching from the first mounting seat 2112.

[0055] In this way, the force exerted by the first telescopic cylinder 3 on the telescopic arm can be further increased, thereby enhancing the carrying capacity of the telescopic arm.

[0056] In one embodiment, please refer to Figures 1 to 10 The telescopic arm includes a second telescopic cylinder 7, the second telescopic cylinder includes 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 section arm group 2 includes a plurality of second section arms 22, and the plurality of second section arms are nested step by step on the outside of the outermost first section arm among the plurality of first section arms 21, and the second piston rod group is used to drive the plurality of second section arms to extend or retract.

[0057] Exemplarily, the second cylinder 71 is movably disposed on the outer surface of the first cylinder 31, and a plurality of second piston rod groups are telescopically disposed in the second cylinder. The first joint arm group 2 may include two second joint arms 22, the two second joint arms are respectively a second main joint arm 221 and a second sub-joint arm 222, the second main joint arm is nested on the outside of the first sub-joint arm 214, and the second sub-joint arm is nested on the outside of the second main joint arm; the second piston rod group can drive the second main joint arm to retract or extend the first sub-joint arm, and drive the second sub-joint arm to retract or extend the second main joint arm.

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

[0059] In one embodiment, please refer to Figure 2 and Figure 6 The inner wall of the outermost first section arm 21 among the multiple first section arms 21 and the inner wall of the multiple second section arms 22 are both provided with a second mounting seat 22a, the second piston rod group includes multiple second piston rods 721, the second cylinder 71 and the multiple second piston rods are both provided with a second mounting ear plate 711, and each second mounting ear plate along the inner and outer directions is inserted into the corresponding second mounting seat.

[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 all provided with a second mounting seat 22a. The second piston rod group may include two second piston rods 721, the two second piston rods 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 711 at one end away from the first roller 5 along the first direction, the second main piston rod and the second sub-piston rod are both formed with a second mounting lug at one end away from the second cylinder along the first direction, the second mounting lug on the second main piston rod can be inserted into the second mounting seat in the second main section arm, the second mounting lug on the second sub-piston rod can be inserted into the second mounting seat in the second sub-section arm, and the second mounting lug 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 in the first sub-arm 214, and each second piston rod 721 is inserted in the corresponding second arm 22, so that each level of the second telescopic cylinder 7 can withstand the force of the corresponding second arm and the outermost first arm among the multiple first arms 21; the carrying capacity of the telescopic arm can be further improved.

[0062] In one embodiment, please refer to Figure 1 and Figure 5 The telescopic arm includes a first luffing cylinder 8, and the first luffing cylinder 8 is telescopically supported between the second sub-section arm 222 and the turntable.

[0063] Exemplarily, the cylinder barrel of the first luffing cylinder 8 may be rotatably connected to the turntable, and the telescopic rod of the first luffing cylinder 8 may be rotatably connected to the second sub-joint arm 222 .

[0064] In this way, by extending and retracting the second sub-section 3, the angle between the first boom assembly 2 and the turntable can be adjusted, further improving the operating range and flexibility of the telescopic boom.

[0065] In one embodiment, please refer to Figure 2 and Figure 6 The second mounting seat 22a includes a second seat body 22a1 and a second pressure plate 22a2. The second seat body is formed with a second slot 22a11. The second slot passes through the second seat body along the second direction to form a second socket at one end. The second slot passes through the second seat body along the third direction to form a second avoidance opening at one end. The second pressure plate is used to cover the second socket.

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

[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 ear plate seat body 7111, the second plug block 7112 is connected to the second ear plate seat body, the second plug block can be inserted into the second slot 22a11 from the second socket, and the second pressure plate 22a2 covers the second socket.

[0068] In this way, the force exerted by the second telescopic oil cylinder 7 on the telescopic arm can be further increased, thereby enhancing the carrying capacity of the telescopic arm.

[0069] In one embodiment, fasteners such as bolts may be passed through the second pressure plate 22a2 and the second seat body 22a1 to improve the connection strength between the second pressure plate 22a2 and the second seat body 22a1 and prevent the second mounting ear plate 711 from being separated from the second mounting seat 22a.

[0070] In this way, the force exerted by the second telescopic oil cylinder 7 on the telescopic arm can be further increased, thereby enhancing the carrying capacity of the telescopic arm.

[0071] In one embodiment, please refer to Figure 6 The side walls of the second slot 22a11 at both ends along the first direction are respectively the first wall and the 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. In other words, the second wall along the second direction is higher than the first wall, so that the second seat body 22a1 is roughly in a "hook" shape.

[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 both ends of the connecting plate along the first direction. The first plate and the second plate are both extended along the second direction to define a buckle groove. The size of the first plate along the second direction is smaller than the size of the second plate along the second direction. In other words, the first plate is lower than the second plate along the second direction, so that the second pressing plate is roughly in a "hook" shape, and the buckle groove is located inside the "hook".

[0073] When the second pressing plate 22a2 covers the second insertion slot 22a11, the first plate 22a21 is supported on one end of the first wall along the second direction, and one end of the second wall along the second direction abuts against the buckle groove.

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

[0075] In one embodiment, please refer to Figure 3 , Figure 5 and Figure 6 A second pulley 2113 is provided in the first main section arm 211, and the telescopic arm includes a second steel wire rope 9, one end of the second steel wire rope is fixedly connected to one end of the first base arm 1 away from the second pulley along the first direction, and the other end of the second steel wire rope is wound around the second pulley.

[0076] Here, when the first main piston rod 3211 is retracted, the first cylinder 31 is inserted into the first cylinder mounting seat 2111 through the first cylinder ear plate 311, and the first telescopic oil cylinder 3 is inverted; therefore, the first cylinder can move along the first direction relative to the first main piston rod 3211, and then drive the first main section arm 211 to move;

[0077] Since one end of the second steel wire rope 9 is fixed to one end of the first base arm 1 away from the second pulley 2113 along the first direction, the other end of the second steel wire rope is wound around the second pulley located in the first main section 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 section arm can be retracted at the same time.

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

[0079] Exemplarily, the first cylinder mounting seat 2111 may be disposed on a side of the second pulley 2113 close to the second telescopic cylinder 7 along the second direction.

[0080] In this way, the first cylinder mounting seat can be used as a rope stopper for the second pulley to reduce the possibility of the second steel wire rope coming off the pulley. It has good working stability and a compact structure, and is suitable for installation spaces with narrow spaces.

[0081] In one embodiment, please refer to Figure 3 , Figure 5 and Figure 6 The first cylinder ear plate 311 includes a first cylinder ear plate seat body 3111 and two first cylinder plug blocks 3112. The number of the first cylinder mounting seat 2111 is two. The two first cylinder ear plate seat bodies are arranged on the inner wall of the first main section arm 211 at intervals along the third direction. The first cylinder ear plate seat body is sleeved on the outer periphery of the first cylinder 31. The two first cylinder plug blocks are arranged on the outer periphery of the first cylinder ear plate seat body along the third direction. Each first cylinder plug block is inserted into the corresponding first cylinder ear plate seat body.

[0082] Exemplarily, the first cylinder mounting seat 2111 includes a first cylinder seat body 21111 and a first cylinder pressure plate 21112, the first cylinder seat body is formed with a first cylinder slot 21111a, one end of the first cylinder slot penetrating the first cylinder seat body along the second direction is formed with a first cylinder socket, and one end of the first cylinder slot penetrating the first cylinder seat body along the third direction is formed with a first cylinder avoidance opening;

[0083] The first cylinder block 3112 is connected to the outer periphery of the first cylinder ear plate seat body 3111, and the first cylinder block can be inserted into the first cylinder slot 21111a from the first cylinder socket. The first cylinder pressure plate 21112 is covered on the first cylinder socket, and then fasteners such as bolts can be passed through the first cylinder pressure plate and the first cylinder seat body 21111 to improve the connection strength between the first cylinder pressure plate 21112 and the first cylinder seat body 21111, so as to prevent the first cylinder ear plate 311 from detaching from the first cylinder mounting seat 21111.

[0084] In this way, the force exerted by the first telescopic oil cylinder 3 on the telescopic arm can be further increased, thereby enhancing the carrying capacity of the telescopic arm.

[0085] In one embodiment, please refer to Figure 3 The connection line of the two first cylinder insert 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 connection line between the two first cylinder insert blocks 3112 along the third direction does not pass through the central axis of the first cylinder 31 , but is located at 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 it is suitable for installation in a narrow space.

[0088] In one embodiment, please refer to Figure 3 and Figure 4 The second pulley 2113 includes a first wheel body 21131 and a second wheel body 21132. The second wheel body is located at one end of the inner wall of the first wheel body close to the first main section arm 211 along the third direction to define a winding groove. The second steel wire rope 9 is wound in the winding groove. 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, since the second wheel body 21132 is close to the inner wall of the first main section arm 211 along the third direction, the second steel wire rope can be reduced from escaping from the winding groove from one side of the second wheel body; and since the diameter of the first wheel body 21131 is larger 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 one embodiment, please refer to Fig. 9The telescopic arm includes a tray 10, which is arranged on the first cylinder 31. The tray is formed with a guide groove extending along the first direction. The second cylinder 71 is provided with a second roller 712, which can be rotatably arranged in the guide groove.

[0091] In this way, the tray 10 and the second roller 712 are provided to form a guide groove. On the one hand, the guide groove can provide a smooth and accurate moving path, and the second roller can slide easily in the guide groove, which can reduce the impact during the movement, making the movement process of the second telescopic cylinder 7 more accurate and controllable; on the other hand, the guide groove can provide additional support and stability, reduce the shaking or unstable sliding of the second roller during the movement, and the movement is stable.

[0092] In one embodiment, the tray 10 can be arranged on the first cylinder 31 by a clamp, so that the second telescopic cylinder 7 has good movement stability.

[0093] In one embodiment, please refer to Figure 2 A receiving block 2131 is provided in the first section arm 21 which is closest to the first main section arm 211 in the inner and outer directions among the multiple first section arms 21. The other end of the first steel wire rope 6 is wound around the first pulley 312 and then fixed on the receiving block. The second cylinder 71 is supported on the receiving block.

[0094] Exemplarily, a receiving block 2131 may be provided in the first sub-arm 213, a receiving groove being formed in the receiving block, the other end of the first steel wire rope 6 is wound around the first pulley 312 and then fixed on the receiving block, 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 auxiliary 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 one embodiment, please refer to Figure 11 to Figure 12 The telescopic arm includes a third telescopic cylinder 20, a second base arm 30 and a second arm group 40. The second base arm is rotatably connected to the first base arm 1. The second arm group is telescopically arranged in the second base arm. The third telescopic cylinder includes 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 on the inner wall of the second arm group.

[0097] In this way, the second base arm 30 can be folded with the first base arm by rotatably connecting the first base arm 1. In other words, the telescopic arm can be folded into two sections, one section consisting of the first arm group 2 and the first base arm, and the other end consisting of the second arm group 40 and the second base arm, which is convenient for transportation and placement.

[0098] The second 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 to the second base arm, and one end of the third piston rod is supported on the inner wall of the second arm group; on the one hand, the second arm group can be extended or retracted into the second base arm, which can further improve the operating range of the telescopic arm; on the other hand, by fixing one end of the third cylinder to the second base arm and one end of the third piston rod is supported on the inner wall of the second arm group, the third telescopic cylinder 20 can participate in the force of the second base arm and the second arm group, thereby further improving the carrying capacity of the telescopic arm.

[0099] In one embodiment, please refer to Fig.12 The telescopic direction of the second arm group 40 is the fourth direction. The telescopic arm includes a support seat 50 and a plurality of sliders 60. The support seat is sleeved on the outer periphery of the third piston rod. At least two of the plurality of sliders are arranged at both ends of the support seat along the fifth direction. At least two of the plurality of sliders are arranged at both ends of the support seat along the sixth direction.

[0100] Exemplarily, the support seat 50 can be mounted on one end of the third piston rod away from the third cylinder along the fourth direction; the number of the sliders 60 can be four, two of the four sliders can be respectively arranged on the two end surfaces of the support seat along the fifth direction, and the other two of the four sliders can be respectively arranged on the two end surfaces of the support seat along the sixth direction.

[0101] In this way, the third piston rod can be supported by contacting the wall surface inside the second arm group 40 along the fifth direction and the sixth direction through multiple sliders 60, so that the third telescopic cylinder 20 participates in the force of the second base arm 30 and the second arm group 40, and deforms together with the second arm group 40 and the second base arm 30, so as to further improve the carrying capacity of the telescopic arm and run smoothly.

[0102] In one embodiment, please refer to Fig.12 The dimension of the second arm assembly 40 along the fifth direction is greater than the dimension along the sixth direction, so that the cross section of the second arm assembly 40 along the fourth direction is roughly composed of a rectangle and a semicircle.

[0103] In this way, during installation, due to limited space, the installation method of rotating 45° can be adopted to improve the installation efficiency.

[0104] In one embodiment, the second arm assembly may also be installed by rotating 90° to improve installation efficiency.

[0105] In one embodiment, please refer to Fig.11The telescopic arm includes a second luffing cylinder 70, a cylinder barrel of the second luffing cylinder can be rotatably arranged on the first base arm 1, and a telescopic rod of the second luffing cylinder can be rotatably arranged on the second base arm 30. By telescoping the second luffing cylinder, the angle between the first base arm and the second base arm can be adjusted to achieve stepless adjustment.

[0106] In this way, not only the operating range and flexibility of the telescopic arm are further improved, but also the angle can be adjusted accurately.

[0107] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A telescopic arm for use on an operating machine, characterized in that: It comprises a first basic arm, a first arm section group and a first telescopic oil cylinder; The first 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, the first piston rod group is telescopically arranged in the first cylinder barrel and connected to the first arm group.

2. The telescopic arm for use on a working machine according to claim 1, characterized in that: The telescopic arm includes a connecting seat and a first roller, one end of the connecting seat is connected to the first cylinder, the other end of the connecting seat is inclined and rotatably connected to the first roller, and the first roller is rollably arranged in the first base arm.

3. The telescopic arm for use on a working machine according to claim 1, characterized in that: The first piston rod group includes a plurality of first piston rods, which are nested in the first cylinder in stages, the first section arm group includes a plurality of first section arms, which are nested in the outside of the first base arm in stages, the first cylinder is provided with a first cylinder ear plate, and the plurality of first piston rods are all provided with a first mounting ear plate. The first section arm closest to the first base arm in the inner-outer direction among the plurality of first section arms is the first main section arm, and the first main section arm is provided with a first cylinder mounting seat. The remaining first section arms except the first main section arm among the plurality of first section arms are all provided with a first mounting seat, the first cylinder ear plate is inserted in the first cylinder mounting seat, and each first mounting ear plate in the inner-outer direction is inserted in the corresponding first mounting seat; The telescopic direction of the first arm group is the first direction, a first pulley is arranged on the first cylinder, 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 fixed to the first arm among the multiple first arms which is closest to the first main arm in the inner and outer directions.

4. The telescopic arm for use on a working machine according to claim 3, characterized in that: The telescopic arm includes a second telescopic cylinder, which 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 multiple second section arms, and the multiple second section arms are nested in stages on the outside of the outermost first section arm among the multiple first section arms. The second piston rod group is used to drive the multiple second section arms to extend or retract.

5. The telescopic arm for use on a working machine according to claim 4, characterized in that: The inner wall of the outermost first section arm among the plurality of first section arms and the inner wall of the plurality of second section arms are both provided with a second mounting seat, the second piston rod group includes a plurality of second piston rods, the second cylinder and the plurality of second piston rods are both provided with a second mounting ear plate, and each second mounting ear plate along the inner and outer directions 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, one end of the second slot passing through the second seat body along the second direction is formed with a second socket, one end of the second slot passing through the second seat body along the third direction is formed with a second avoidance opening, and the second pressing plate is used to cover the second socket; The second mounting ear plate includes a second ear plate seat body and a second plug block, the second ear plate seat body is sleeved on the outer periphery of the second piston rod, the second plug block is connected to the outer periphery of the second ear plate seat body, and the second plug block can be inserted into the second slot from the second socket, wherein the first direction, the second direction and the third direction are perpendicular to each other; The side walls of the second slot at both ends along the first direction are respectively a first wall and a second wall, and the dimension of the first wall along the second direction is smaller than the dimension 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 two ends of the connecting plate along the first direction, the first plate and the second plate are both extended 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; When the second pressing plate covers the second slot, the first plate is supported on one end of the first wall along the second direction, and one end of the second wall along the second direction abuts against the buckle slot.

6. The telescopic arm for use on a working machine according to claim 3, characterized in that: The telescopic direction of the first arm group is the first direction, a second pulley is arranged in the first main arm, 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 around the second pulley; The first cylinder mounting seat is located on one side of the second pulley along the second direction; The first cylinder ear plate includes a first cylinder ear plate seat body and two first cylinder insert blocks. The number of first cylinder mounting seats is two. The two first cylinder ear plate seat bodies are arranged on the inner wall of the first main section arm at intervals along the third direction. The first cylinder ear plate seat body is sleeved on the outer periphery of the first cylinder. The two first cylinder insert blocks are arranged on the outer periphery of the first cylinder ear plate seat body along the third direction, and each first cylinder insert block is inserted in the corresponding first cylinder ear plate seat body.

7. The telescopic arm for use on a working machine according to claim 6, characterized in that: A connection line between the two first cylinder inserts along the third direction is located on one side of the central axis of the first cylinder along the second direction.

8. The telescopic arm for use on a working machine according to claim 6, characterized in that: The second pulley includes a first wheel body and a second wheel body. The second wheel body is located at one end of the inner wall of the first wheel body close to the first main section arm along the third direction to define a winding groove. The second steel wire rope is wound in the winding groove. The diameter of the first wheel body is greater than the diameter of the second wheel body.

9. The telescopic arm for use on a working machine according to claim 4, characterized in that: The telescopic arm comprises a tray, which is arranged on the first cylinder and has a guide groove extending along the first direction; the second cylinder is provided with a second roller, which can be rotatably arranged in the guide groove; A receiving block is provided in the first section arm which is closest to the first main section arm in the inner and outer directions among the plurality of first section arms, the other end of the first steel wire rope is wound around the first pulley and then fixed on the receiving block, and the second cylinder is supported on the receiving block.

10. The telescopic arm for use on a working machine according to claim 1, characterized in that: The telescopic arm includes a third telescopic cylinder, a second base arm and a second arm group. The second base arm is rotatably connected to the first base arm, and the second arm group is telescopically arranged in the second base arm. The third telescopic cylinder includes 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 on the inner wall of the second arm group. The telescopic direction of the second arm group is a fourth direction. The telescopic arm includes a support seat and a plurality of sliders. The support seat is sleeved on the outer periphery of the third piston rod. At least two of the plurality of sliders are arranged at both ends of the support seat along the fifth direction, and at least two of the plurality of sliders are arranged at both ends of the support seat along the sixth direction, wherein the fourth direction, the fifth direction and the sixth direction are perpendicular to each other.

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