Folding arm device and aerial work vehicle

Abstract

The present invention discloses a folding arm device and an aerial work vehicle, comprising a turntable, a lower folding arm, a lower connecting rod, a lower connector, a pulling rod, an upper folding arm, an upper connecting rod, an upper connector, a boom, a folding arm oil cylinder and a boom oil cylinder; the lower folding arm and the lower connecting rod are respectively hinged to the turntable and the lower connector, and the lower folding arm, the lower connecting rod, the turntable and the lower connector form a parallelogram mechanism; the upper folding arm and the upper connecting rod are respectively hinged to the lower connector and the upper connector, and the upper folding arm, the upper connecting rod, the lower connector and the upper connector form a parallelogram mechanism; the pulling rod is respectively hinged to the lower folding arm and the upper folding arm; one end of the boom is hinged to the upper connector; the folding arm oil cylinder is respectively hinged to the lower folding arm and the upper folding arm; the boom oil cylinder is respectively hinged to the upper connector and the boom; when the folding arm device is in a folded state, the upper folding arm, the upper connecting rod, the lower folding arm, the lower connecting rod and the boom are parallel. The starting impact force of the folding arm device is small, and it is not easy to cause structural damage, which can ensure that the folding arm device has good strength performance.

Description

Technical Field

[0001] The present invention relates to the technical field of aerial work equipment, and more specifically, to a folding arm device. In addition, the present invention also relates to an aerial work vehicle including the folding arm device. Background Art

[0002] Folding arms are very common in construction machinery. For example, in aerial work vehicles, the folding arm is installed on the chassis of the aerial work vehicle. The folding arm is driven by a cylinder to pitch or rotate, so that the end of the folding arm reaches a certain height for aerial work.

[0003] The folding arm in the prior art includes an upper folding arm, an upper connecting rod, a lower folding arm, a lower connecting rod, an upper connector, and a lower connector. The upper folding arm and the upper connecting rod are arranged in parallel and are hinged to the upper connector and the lower connector, respectively. The lower folding arm and the lower connecting rod are arranged in parallel and are hinged to the upper connector and the lower connector, respectively. However, when the existing folding arm is in the folded state, the upper folding arm (or upper connecting rod) and the lower folding arm (or lower connecting rod) are arranged in a cross-arrangement. That is, the upper folding arm (or upper connecting rod), the lower folding arm (or lower connecting rod), the upper connector, and the lower connector form an 8-shaped structure. This structure is difficult to start, has a large starting impact force, and is prone to structural damage, which affects the strength of the folding arm. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a folding arm device which has a small starting impact force when in a folded state.

[0005] Another object of the present invention is to provide an aerial work vehicle comprising the above-mentioned folding arm device, wherein the starting impact force of the folding arm is small when the folding arm is folded.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A folding arm device comprises a turntable, a lower folding arm, a lower connecting rod, a lower connector, a pull rod, an upper folding arm, an upper connecting rod, an upper connector, an arm frame, a folding arm oil cylinder and an arm frame oil cylinder;

[0008] The turntable is used to connect with the chassis of the aerial work vehicle;

[0009] The lower folding arm and the lower connecting rod are respectively hinged to the turntable and the lower connecting body, and the lower folding arm, the lower connecting rod, the turntable and the lower connecting body form a parallelogram mechanism;

[0010] The upper folding arm and the upper connecting rod are hinged to the lower connecting body and the upper connecting body respectively, and the upper folding arm, the upper connecting rod, the lower connecting body and the upper connecting body form a parallelogram mechanism;

[0011] The pull rod is hinged to the lower folding arm and the upper folding arm respectively;

[0012] One end of the arm is hinged to the upper connector;

[0013] The folding arm oil cylinder is hinged to the lower folding arm and the upper folding arm respectively;

[0014] The boom oil cylinder is hinged to the upper connector and the boom respectively;

[0015] When the folding arm device is in a folded state, the upper folding arm, the upper connecting rod, the lower folding arm, the lower connecting rod and the arm frame are parallel.

[0016] Optionally, the boom includes a first boom, a second boom, a third boom and a fourth boom; the folding arm device further includes a telescopic cylinder;

[0017] The first boom is hinged to the upper connector and the boom cylinder respectively, the second boom is slidably connected to the first boom; the third boom is slidably connected to the second boom, and the fourth boom is slidably connected to the third boom;

[0018] The telescopic oil cylinder is hinged to the first boom and the second boom respectively; the third boom is telescopically linked with the second boom through a chain; and the fourth boom is telescopically linked with the third boom through a chain.

[0019] Optionally, it further includes an upper extension arm, a lower extension arm, a fly arm connecting rod, a connecting arm, a fly arm cylinder, an upper leveling cylinder, a lower leveling cylinder, a rotary motor and a working platform;

[0020] One end of the upper extension arm is hinged to the fourth boom, and the other end is hinged to the connecting arm and the fly boom connecting rod respectively; one end of the lower extension arm is hinged to the fourth boom, and the other end is hinged to the fly boom connecting rod; the fourth boom, the upper extension arm, the lower extension arm and the fly boom connecting rod form a parallelogram mechanism;

[0021] The fly arm oil cylinder is hinged to the fourth boom and the connecting arm respectively;

[0022] The fly arm cylinder and the lower extension arm are respectively coaxial with the connection points of the fourth boom; the connection points of the fly arm cylinder and the connecting arm, and the connection points of the connecting arm and the fly arm connecting rod and the upper extension arm are respectively coaxial;

[0023] The lower leveling cylinder is hinged to the upper connector and the first boom respectively;

[0024] The upper leveling cylinder is hinged to the fly arm connecting rod and the connecting arm respectively; the connection between the connecting arm and the fly arm connecting rod and the connection between the fly arm connecting rod and the lower extension arm are coaxial;

[0025] The rotary motor is connected to the connecting arm, and the working platform is connected to the rotary motor.

[0026] Optionally, the lower folding arm includes:

[0027] Two lower folding arm bodies are arranged in parallel, and both ends of the two lower folding arm bodies are hinged to the turntable and the lower connecting body respectively;

[0028] A first mounting member is connected between the two lower folding arm bodies, with two ends thereof passing through the two lower folding arm bodies respectively;

[0029] Two first oil cylinder supports are respectively connected to the two ends of the first mounting member and are respectively located on the outside of the two lower folding arm bodies; there are two folding arm oil cylinders, and one end of the two folding arm oil cylinders is respectively hinged to the two first oil cylinder supports;

[0030] A second mounting member is connected between the two lower folding arm bodies, with two ends thereof passing through the two lower folding arm bodies respectively;

[0031] Two tie rod supports are respectively connected to the two ends of the second mounting member and are respectively located on the outside of the two lower folding arm bodies; there are two tie rods, and one end of the two tie rods is respectively hinged to the two tie rod supports.

[0032] Optionally, the upper folding arm includes:

[0033] Two upper folding arm bodies are arranged in parallel, and both ends of the two upper folding arm bodies are hinged to the lower connecting body and the upper connecting body respectively;

[0034] A second connecting member connected between the two upper folding arm bodies;

[0035] Two second oil cylinder supports are respectively connected to the two upper folding arm bodies; there are two folding arm oil cylinders, and one end of the two folding arm oil cylinders is respectively hinged to the two second oil cylinder supports;

[0036] The U-shaped plate is connected between the two upper folding arm bodies and is respectively connected to the two second oil cylinder supports.

[0037] Optionally, the upper connector includes:

[0038] Two symmetrically arranged first folding plates, a first pin connected between the tops of the two first folding plates, the first pin being used to connect to the boom; a third cylinder support connected between the bottoms of the two first folding plates, the third cylinder support being hinged to one end of the boom cylinder;

[0039] Four first ear plates are arranged in pairs on the outer sides of the two first folding plates, and a second pin and a third pin are connected between the pairs of first ear plates. The second pin is connected to the upper folding arm, and the third pin is connected to the upper connecting rod.

[0040] A fourth oil cylinder support is provided on the outer side of one of the first folding plates, and one end of the lower leveling oil cylinder is hinged to the fourth oil cylinder support.

[0041] Optionally, the lower connector includes:

[0042] Tubular parts;

[0043] The first seat plate, the second seat plate, the third seat plate, the fourth seat plate, the fifth seat plate and the sixth seat plate are sequentially arranged on the outer periphery of the tubular member along the axial direction of the tubular member, wherein the first seat plate, the third seat plate, the fourth seat plate and the sixth seat plate have the same structure, and the second seat plate and the fifth seat plate have the same structure; the first seat plate and the sixth seat plate have the same orientation along the circumferential direction of the tubular member, the third seat plate and the fourth seat plate have the same orientation along the circumferential direction of the tubular member, and the orientations of the first seat plate and the third seat plate along the circumferential direction of the tubular member are staggered by a preset angle; the second seat plate and the fifth seat plate have the same orientation along the circumferential direction of the tubular member;

[0044] Eight sixth pins, two of which are respectively provided between the first seat plate and the second seat plate, between the second seat plate and the third seat plate, between the fourth seat plate and the fifth seat plate, and between the fifth seat plate and the sixth seat plate; the two upper folding arms, the two upper connecting rods, the two lower folding arms and the two lower connecting rods are rotationally connected with the eight sixth pins in a one-to-one correspondence.

[0045] Optionally, a through hole is provided on the side wall of the tubular member, and the pull rod passes through the through hole.

[0046] Optionally, the length of the pull rod is adjustable.

[0047] An aerial work vehicle comprises any one of the above-mentioned folding arm devices.

[0048] The folding arm device provided by the present invention is in a folded state when not in use. When work is needed, the upper folding arm is driven to rotate by the folding arm cylinder, so that the pull rod pulls the upper folding arm and the lower folding arm to rotate relative to each other. The lower folding arm, lower connecting rod, turntable and lower connector form a parallelogram mechanism, and the upper folding arm, upper connecting rod, lower connector and upper connector form a parallelogram mechanism to achieve the extension of the upper folding arm and the lower folding arm; in addition, the arm is driven to rotate relative to the upper connector by the arm cylinder to achieve the arm amplitude change.

[0049] Because when the folding arm device is in a folded state, the upper folding arm, upper connecting rod, lower folding arm, lower connecting rod and arm are parallel. Therefore, when the folding arm cylinder and the arm cylinder are started, the lever arm is large and the required starting force is small. The folding arm cylinder and the arm cylinder are easier to start, so that the starting impact force of the folding arm device is small, and it is not easy to cause structural damage, which can ensure that the folding arm device has good strength performance.

[0050] The aerial work vehicle provided by the present invention includes the above-mentioned folding arm device and has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0052] Figure 1 This is a schematic structural diagram of the folding arm device provided by a specific embodiment of the present invention when it is unfolded;

[0053] Figure 2 for Figure 1 A schematic diagram of the structure of the folding arm device when folded;

[0054] Figure 3 is a structural diagram of the connecting arm;

[0055] Figure 4 for Figure 3 A structural diagram from another perspective;

[0056] Figure 5 It is a structural diagram of the lower folding arm;

[0057] Figure 6 for Figure 5 A structural diagram from another perspective;

[0058] Figure 7 Schematic diagram of the structure of the upper folding arm;

[0059] Figure 8 for Figure 7 A structural diagram from another perspective;

[0060] Figure 9 is a structural diagram of the upper connector;

[0061] Figure 10 for Figure 9 A structural diagram from another perspective;

[0062] Figure 11 is a schematic structural diagram of the lower connector;

[0063] Figure 12 for Figure 11 A structural diagram from another perspective;

[0064] Figure 13 Schematic diagram of the structure of the pull rod;

[0065] Figure 14 It is a structural diagram of the upper connecting rod or the lower connecting rod.

[0066] Figures 1 to 14 The reference numerals in the figures are as follows:

[0067] 1 is the turntable, 2 is the lower folding arm, 3 is the lower connecting rod, 4 is the lower connector, 5 is the pull rod, 6 is the upper folding arm, 7 is the upper connecting rod, 8 is the upper connector, 9 is the boom, 10 is the folding arm cylinder, 11 is the boom cylinder, 12 is the telescopic cylinder, 13 is the upper extension arm, 14 is the lower extension arm, 15 is the flying arm connecting rod, 16 is the connecting arm, 17 is the flying arm cylinder, 18 is the upper leveling cylinder, 19 is the lower leveling cylinder, 20 is the rotary motor, and 21 is the working platform;

[0068] 201 is the lower folding arm body, 202 is the first mounting member, 203 is the second mounting member, 204 is the first connecting member, 205 is the fourth ear plate, 206 is the second shaft sleeve, 207 is the eighth pin, 208 is the triangle plate, 209 is the ninth pin, 210 is the bracket folding plate, 211 is the third shaft sleeve, 212 is the third bearing, 213 is the second cover plate, 214 is the third plate, 215 is the connecting plate, and 216 is the rib plate;

[0069] 301 is the connecting rod body, 302 is the fourth plate, 303 is the sixth sleeve, and 304 is the fifth bearing;

[0070] 401 is a tubular member, 4011 is a through hole, 402 is a first seat plate, 403 is a second seat plate, 404 is a third seat plate, 405 is a fourth seat plate, 406 is a fifth seat plate, 407 is a sixth seat plate, and 408 is a sixth pin shaft;

[0071] 501 is the pull rod body, 502 is the first pull rod head, 503 is the second pull rod head, 504 is the first nut, 505 is the second nut, and 506 is the second bearing;

[0072] 601 is the upper folding arm body, 602 is the second connecting member, 603 is the U-shaped plate, 604 is the first closing plate, 605 is the first wrapping plate, 606 is the first reinforcing plate, 607 is the first sticking plate, 608 is the second sticking plate, 609 is the limiting structure, 610 is the eighth seat plate, 611 is the stepped shaft, 612 is the third ear plate, 613 is the seventh pin shaft, 614 is the first shaft sleeve, and 615 is the first bearing;

[0073] 801 is the first folding plate, 802 is the first pin, 803 is the first ear plate, 804 is the second pin, 805 is the third pin, 806 is the second folding plate, 807 is the third folding plate, 808 is the seventh seat plate, 809 is the second reinforcement plate, 810 is the fourth pin, 811 is the second ear plate, 812 is the rectangular support tube, 813 is the second closing plate, and 814 is the fifth pin;

[0074] 901 is the first boom, 902 is the second boom, 903 is the third boom, and 904 is the fourth boom;

[0075] 161 is the connecting arm body, 162 is the front side plate, 163 is the rear side plate, 164 is the mounting plate, 165 is the fourth shaft sleeve, 166 is the fifth shaft sleeve, 167 is the fourth bearing, and 168 is the tenth pin shaft. DETAILED DESCRIPTION

[0076] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0077] The core of the present invention is to provide a folding arm device, which has a small starting impact force when in a folded state. Another core of the present invention is to provide an aerial work vehicle including the folding arm device, which has a small starting impact force when the folding arm is folded.

[0078] Please refer to Figures 1-14 An embodiment of the present invention provides a folding arm device, including a turntable 1, a lower folding arm 2, a lower connecting rod 3, a lower connector 4, a pull rod 5, an upper folding arm 6, an upper connecting rod 7, an upper connector 8, an arm 9, a folding arm cylinder 10 and an arm cylinder 11. The turntable 1 is used to connect to the chassis of the aerial work vehicle; the lower folding arm 2 and the lower connecting rod 3 are respectively hinged to the turntable 1 and the lower connector 4, and the lower folding arm 2, the lower connecting rod 3, the turntable 1 and the lower connector 4 form a parallelogram mechanism; the upper folding arm 6 and the upper connecting rod 7 are respectively hinged to the lower connector 4 and the upper connector 8, and the upper folding arm 6, the upper connecting rod 7, the lower connector 4 and the upper connector 8 form a parallelogram mechanism; the pull rod 5 is respectively hinged to the lower folding arm 2 and the upper folding arm 6; one end of the arm 9 is hinged to the upper connector 8; the folding arm cylinder 10 is respectively hinged to the lower folding arm 2 and the upper folding arm 6; the arm cylinder 11 is respectively hinged to the upper connector 8 and the arm 9; when the folding arm device is in a folded state, the upper folding arm 6, the upper connecting rod 7, the lower folding arm 2, the lower connecting rod 3 and the arm 9 are parallel.

[0079] When not in use, the folding arm device is in a folded state. When work is needed, the upper folding arm 6 is driven to rotate by the folding arm cylinder 10, so that the pull rod 5 pulls the upper folding arm 6 and the lower folding arm 2 to rotate relative to each other. The lower folding arm 2, the lower connecting rod 3, the turntable 1 and the lower connector 4 form a parallelogram mechanism, and the upper folding arm 6, the upper connecting rod 7, the lower connector 4 and the upper connector 8 form a parallelogram mechanism to achieve the extension of the upper folding arm 6 and the lower folding arm 2; in addition, the arm 9 is driven to rotate relative to the upper connector 8 by the arm cylinder 11 to achieve the amplitude change of the arm 9.

[0080] Since the upper folding arm 6, the upper connecting rod 7, the lower folding arm 2, the lower connecting rod 3 and the arm 9 are parallel when the folding arm device is in a folded state, when the folding arm cylinder 10 and the arm frame cylinder 11 are started, the lever arm is large and the required starting force is small. The folding arm cylinder 10 and the arm frame cylinder 11 are easier to start, so that the starting impact force of the folding arm device is small, and it is not easy to cause structural damage, which can ensure that the folding arm device has good strength performance.

[0081] In addition, considering that the maximum lifting height of the folding arm device in the prior art is limited and cannot meet the requirements of large-height lifting; in order to solve this technical problem, in some embodiments, the boom 9 includes a first boom 901, a second boom 902, a third boom 903 and a fourth boom 904; the folding arm device also includes a telescopic cylinder 12; the first boom 901 is hinged to the upper connector 8 and the boom cylinder 11 respectively, and the second boom 902 is slidingly connected to the first boom 901; the third boom 903 is slidingly connected to the second boom 902, and the fourth boom 904 is slidingly connected to the third boom 903; the telescopic cylinder 12 is hinged to the first boom 901 and the second boom 902 respectively; the third boom 903 is telescopically linked to the second boom 902 by a chain; the fourth boom 904 is telescopically linked to the third boom 903 by a chain.

[0082] During operation, the second boom 902 is driven to extend and retract relative to the first boom 901 by the telescopic cylinder 12, and the third boom 903 is driven to extend and retract relative to the second boom 902 and the fourth boom 904 is driven to extend and retract synchronously relative to the third boom 903 through chains. Therefore, when the boom cylinder 11 drives the first boom 901 to rotate relative to the upper connector 8, the operating height of the boom 9 can be greatly improved, so that the folding arm device can meet the requirements of large-height lifting.

[0083] Furthermore, in order to expand the operating range of the working platform 21, in some embodiments, the folding arm device also includes an upper extension arm 13, a lower extension arm 14, a flying arm connecting rod 15, a connecting arm 16, a flying arm cylinder 17, an upper leveling cylinder 18, a lower leveling cylinder 19, a rotary motor 20 and a working platform 21; one end of the upper extension arm 13 is hinged to the fourth boom 904, and the other end of the upper extension arm 13 is hinged to the connecting arm 16 and the flying arm connecting rod 15 respectively; one end of the lower extension arm 14 is hinged to the fourth boom 904, and the other end of the lower extension arm 14 is hinged to the flying arm connecting rod 15; the fourth boom 904, the upper extension arm 13, the lower extension arm 14 and the flying arm connecting rod 15 form a parallelogram Mechanism; the flying arm cylinder 17 is respectively hinged to the fourth boom 904 and the connecting arm 16; the flying arm cylinder 17 and the lower extension arm 14 are respectively coaxial with the connection of the fourth boom 904; the connection between the flying arm cylinder 17 and the connecting arm 16, and the connection between the connecting arm 16 and the flying arm connecting rod 15 and the upper extension arm 13 are respectively coaxial; the lower leveling cylinder 19 is respectively hinged to the upper connector 8 and the first boom 901; the upper leveling cylinder 18 is respectively hinged to the flying arm connecting rod 15 and the connecting arm 16; the connection between the connecting arm 16 and the flying arm connecting rod 15 and the connection between the flying arm connecting rod 15 and the lower extension arm 14 are coaxial; the rotary motor 20 is connected to the connecting arm 16, and the working platform 21 is connected to the rotary motor 20.

[0084] During operation, the connecting arm 16 is driven by the flying arm cylinder 17, and under the action of the parallelogram mechanism formed by the fourth boom 904, the upper extension arm 13, the lower extension arm 14 and the flying arm connecting rod 15, the connecting arm 16 is moved up and down, and then the connecting arm 16 drives the working platform 21 to move up and down through the rotary motor 20; at the same time, the upper leveling cylinder 18 and the lower leveling cylinder 19 work together to make the connecting arm 16 drive the working platform 21 to be in a horizontal state.

[0085] That is to say, this embodiment extends the length of the working platform 21 from the end of the boom 9 (that is, the end of the fourth boom 904) by arranging the upper extension arm 13, the lower extension arm 14, the flying arm link 15 and the connecting arm 16 at the end of the boom 9, that is, the operating length of the working platform 21 is extended, so that the operating range of the working platform 21 is wider.

[0086] It should be noted that the present embodiment does not limit the specific structure of the connecting arm 16. In some embodiments, the connecting arm 16 includes a connecting arm body 161, two front side plates 162, two rear side plates 163, a mounting plate 164, two fourth shaft sleeves 165, and two fifth shaft sleeves 166. The two front side plates 162 are disposed opposite each other and are respectively disposed on both sides of the front portion of the connecting arm body 161; the two rear side plates 163 are disposed opposite each other and are respectively disposed on both sides of the rear portion of the connecting arm body 161; the two fourth shaft sleeves 165 are respectively disposed on the inner sides of the two front side plates 162; the two fifth shaft sleeves 166 are respectively disposed on the inner sides of the two rear side plates 163; the two fourth bearings 167 are respectively mounted in the two fifth shaft sleeves 166; and the tenth pin 168 is mounted in the two fourth shaft sleeves 165 for connecting to the cylinder rod head of the upper leveling cylinder 18.

[0087] In addition, the above embodiments do not limit the specific structure of the lower folding arm 2. In some embodiments, the lower folding arm 2 includes two lower folding arm bodies 201, a first mounting member 202, two first oil cylinder supports, a second mounting member 203 and two pull rod supports. The two lower folding arm bodies 201 are arranged in parallel, and the two ends of the two lower folding arm bodies 201 are respectively hinged to the turntable 1 and the lower connecting body 4; the first mounting member 202 and the second mounting member 203 are both connected between the two lower folding arm bodies 201, and the two ends of the first mounting member 202 pass through the two lower folding arm bodies 201 respectively; the two second mounting members 203 are respectively connected to the lower folding arm bodies 201. A cylinder support is respectively connected to the two ends of the first mounting member 202, and the two first cylinder supports are respectively located on the outside of the two lower folding arm bodies 201; there are two folding arm cylinders 10, and one end of the two folding arm cylinders 10 is respectively hinged to the two first cylinder supports; the two ends of the second mounting member 203 pass through the two lower folding arm bodies 201 respectively; the two tie rod supports are respectively connected to the two ends of the second mounting member 203, and the two tie rod supports are respectively located on the outside of the two lower folding arm bodies 201; there are two tie rods 5, and one end of the two tie rods 5 is respectively hinged to the two tie rod supports.

[0088] It can be understood that the first mounting member 202 and the second mounting member 203 connect the two lower folding arm bodies 201 to form a frame structure. At the same time, two first cylinder supports and two pull rod supports are arranged, that is, the number of folding arm cylinders 10 and pull rods 5 are two, and the two folding arm cylinders 10 and the two pull rods 5 are respectively located on both sides of the lower folding arm 2. This dual-cylinder drive method greatly improves the structural stability of the folding arm device.

[0089] In some embodiments, a first connecting member 204 is connected between the two lower folding arm bodies 201 to improve the structural strength and stability of the lower folding arm 2 .

[0090] In some embodiments, the lower folding arm body 201 is a rectangular tube structure.

[0091] In some embodiments, the first connecting member 204 is a circular tube structure. Further, in some embodiments, the number of the first connecting members 204 is two.

[0092] In some embodiments, both the first mounting member 202 and the second mounting member 203 are circular tube structures; the number of the first mounting member 202 is one, and the number of the second mounting member 203 is two.

[0093] In some embodiments, a single first oil cylinder support includes two fourth ear plates 205 arranged in parallel, second shaft sleeves 206 respectively arranged on the inner sides of the two fourth ear plates 205 , and an eighth pin 207 sleeved in the two second shaft sleeves 206 .

[0094] In some embodiments, a single tie rod support includes two parallel triangular plates 208 and a ninth pin 209 connected between the two triangular plates 208. The positions of the eighth pin 207 and the ninth pin 209 are obtained by the dynamic optimization design-NLPOL quadratic programming algorithm.

[0095] In some embodiments, a bracket folding plate 210 is connected between the two lower folding arm bodies 201 to limit the position of the folding arm device when it is folded.

[0096] In some embodiments, both ends of the two lower folding arm bodies 201 are respectively provided with a third shaft sleeve 211 , and the four third bearings 212 are respectively installed in conjunction with the four third shaft sleeves 211 .

[0097] In some embodiments, a second wrapping plate 213 is provided at both ends of the two lower folding arm bodies 201; a third patch plate 214 is provided on the upper and lower sides of the two lower folding arm bodies 201; a connecting plate 215 is also connected between the two lower folding arm bodies 201; and a rib plate 216 is connected between the lower folding arm body 201 and the corresponding first mounting member 202.

[0098] In addition, the above embodiments do not limit the specific structure of the upper folding arm 6. In some embodiments, the upper folding arm 6 includes two upper folding arm bodies 601, a second connecting member 602, two second oil cylinder supports, and a U-shaped plate 603. The two upper folding arm bodies 601 are arranged in parallel, and the two ends of each of the two upper folding arm bodies 601 are respectively hinged to the lower connecting body 4 and the upper connecting body 8; the second connecting member 602 is connected between the two upper folding arm bodies 601; the two second oil cylinder supports are respectively connected to the two upper folding arm bodies 601; the number of folding arm cylinders 10 is two, and one end of the two folding arm cylinders 10 is respectively hinged to the two second oil cylinder supports; the U-shaped plate 603 is connected between the two upper folding arm bodies 601 and is respectively connected to the two second oil cylinder supports.

[0099] It can be understood that the second connecting member 602 connects the two lower folding arm bodies 201 to form a frame structure. Simultaneously, the two second cylinder supports are arranged, i.e., the number of folding arm cylinders 10 is two. Using two folding arm cylinders 10 to drive the upper folding arm 6 significantly improves the structural stability of the folding arm device. Furthermore, connecting a U-shaped plate 603 between the two upper folding arm bodies 601 and connecting the U-shaped plate 603 to the two second cylinder supports respectively improves the structural strength and stability of the upper folding arm 6 as a whole and the two second cylinder supports.

[0100] In some embodiments, the upper folding arm body 601 is a rectangular tube structure.

[0101] In some embodiments, the second connecting member 602 is a circular tube structure. Further, in some embodiments, the number of the second connecting members 602 is three.

[0102] In some embodiments, the second connecting member 602 is inserted into the circular hole provided in the upper folding arm body 601 ; and first sealing plates 604 are welded to both ends of the second connecting member 602 .

[0103] In some embodiments, a first wrapping plate 605 is welded to one end of the upper folding arm body 601, a first reinforcing plate 606 is welded to the upper side of the upper folding arm body 601, a first patch plate 607 is welded to the lower side of the upper folding arm body 601, and a second patch plate 608 is welded to the inner side of the upper folding arm body 601, and a limiting structure 609 is provided on the second patch plate 608.

[0104] In some embodiments, the second cylinder support includes two parallel eighth base plates 610 and a stepped shaft 611 connected between the two eighth base plates 610. The folding arm cylinder 10 is hingedly connected to the second cylinder support via the stepped shaft 611. A locking nut and washer are provided at one end of the stepped shaft 611 for locking the cylinder rod head of the folding arm cylinder 10.

[0105] In some embodiments, two parallel third lugs 612 are provided on each end of the two upper folding arm bodies 601 near the second cylinder support. A seventh pin 613 is connected between the two third lugs 612 corresponding to the same upper folding arm body 601. The axis positions of the seventh pin 613 and the stepped shaft 611 are determined using the dynamic optimization design - NLPOL quadratic programming algorithm.

[0106] In some embodiments, both ends of the two upper folding arm bodies 601 are respectively provided with a first shaft sleeve 614 , and the four first bearings 615 are respectively installed in conjunction with the four first shaft sleeves 614 .

[0107] In addition, the above embodiments do not limit the specific structure of the upper connector 8. In some embodiments, the upper connector 8 includes two first folding plates 801, four first ear plates 803, a first pin 802, a second pin 804, a third pin 805, a third cylinder support and a fourth cylinder support. The two first folding plates 801 are symmetrically arranged, and a first pin 802 is connected between the tops of the two first folding plates 801, and the first pin 802 is used to connect to the boom 9; a third cylinder support is connected between the bottoms of the two first folding plates 801, and the third cylinder support is hinged to one end of the boom cylinder 11; four first ear plates 803 are respectively arranged in pairs on the outside of the two first folding plates 801, and the pairs of first ear plates 803 are connected with a second pin 804 and a third pin 805, the second pin 804 is connected to the upper folding arm 6, and the third pin 805 is connected to the upper connecting rod 7; a fourth cylinder support is provided on the outside of one of the first folding plates 801, and one end of the lower leveling cylinder 19 is hinged to the fourth cylinder support.

[0108] That is, the boom 9 is hinged to the upper connector 8 via the first pin 802; the boom cylinder 11 is hinged to the upper connector 8 via the third cylinder support; the upper folding arm 6 is hinged to the upper connector 8 via the second pin 804, and the upper folding arm 6 includes two upper folding arm bodies 601, which are respectively hinged to the two second pins 804; the upper connecting rod 7 is hinged to the upper connector 8 via the third pin 805, and there are two upper connecting rods 7, which are respectively hinged to the two third pins 805; the lower leveling cylinder 19 is hinged to the upper connector 8 via the fourth cylinder support. The structure of the upper connector 8 is lightweight, novel, and rationally arranged, which facilitates the rational layout of the hinge points of the various components connected to it, ensuring that each hinge point has an appropriate relative position.

[0109] In some embodiments, a second folding plate 806 and a third folding plate 807 are connected between the bottoms of the two first folding plates 801 to connect the two first folding plates 801 together; the third cylinder support includes two seventh seat plates 808, two second reinforcing plates 809 and a fourth pin 810, the two seventh seat plates 808 are arranged in parallel and connected to the second folding plate 806 and the third folding plate 807, the two second reinforcing plates 809 are respectively arranged on the inner sides of the two seventh seat plates 808, and the fourth pin 810 is arranged between the two seventh seat plates 808.

[0110] In some embodiments, the fourth cylinder support includes two parallel second ear plates 811, a rectangular support tube 812 provided below the two second ear plates 811 and connected to the first folding plate 801, a second sealing plate 813 for sealing the port of the rectangular support tube 812, and a fifth pin shaft 814 connected between the two second ear plates 811.

[0111] In addition, the above embodiments do not limit the specific structure of the lower connector 4. In some embodiments, the lower connector 4 includes a tubular member 401, a first seat plate 402, a second seat plate 403, a third seat plate 404, a fourth seat plate 405, a fifth seat plate 406, a sixth seat plate 407 and eight sixth pins 408. Among them, the first seat plate 402, the second seat plate 403, the third seat plate 404, the fourth seat plate 405, the fifth seat plate 406 and the sixth seat plate 407 are sequentially arranged on the outer periphery of the tubular member 401 along the axial direction of the tubular member 401, wherein the first seat plate 402, the third seat plate 404, the fourth seat plate 405 and the sixth seat plate 407 have the same structure, and the second seat plate 403 and the fifth seat plate 406 have the same structure; the first seat plate 402 and the sixth seat plate 407 have the same orientation along the circumference of the tubular member 401, the third seat plate 404 and the fourth seat plate 405 have the same orientation along the circumference of the tubular member 401, and the orientations of the first seat plate 402 and the third seat plate 404 along the circumference of the tubular member 401 are staggered by a preset angle; the second seat plate 403 and the fifth seat plate 406 have the same orientation along the circumference of the tubular member 401. Two sixth pins 408 are provided between the first seat plate 402 and the second seat plate 403, between the second seat plate 403 and the third seat plate 404, between the fourth seat plate 405 and the fifth seat plate 406, and between the fifth seat plate 406 and the sixth seat plate 407; the two upper folding arms 6, the two upper connecting rods 7, the two lower folding arms 2 and the two lower connecting rods 3 are rotationally connected with the eight sixth pins 408 in a one-to-one correspondence.

[0112] It should be noted that when the upper folding arm 6 includes two upper folding arm bodies 601 and the lower folding arm 2 includes two lower folding arm bodies 201, the two upper folding arm bodies 601 and the two lower folding arm bodies 201 are respectively connected to the four sixth pin shafts 408 in a one-to-one corresponding rotational connection.

[0113] That is to say, the upper folding arm 6, the upper connecting rod 7, the lower folding arm 2 and the lower connecting rod 3 are respectively hinged to the lower connecting body 4 through the sixth pin shaft 408. This structure of the lower connecting body 4 is simple, light, novel, and reasonably laid out, which is conducive to the reasonable layout of the hinge points of the various components connected thereto, ensuring that each hinge point has a suitable relative position.

[0114] In some embodiments, the tubular member 401 is a circular tube. Of course, in other embodiments, the tubular member 401 may also be a polygonal tube formed by bending a plate member multiple times, as long as it is convenient for installing the first seat plate 402, the second seat plate 403, the third seat plate 404, the fourth seat plate 405, the fifth seat plate 406, and the sixth seat plate 407.

[0115] In some embodiments, the tubular member 401 , the first seat plate 402 , the second seat plate 403 , the third seat plate 404 , the fourth seat plate 405 , the fifth seat plate 406 , and the sixth seat plate 407 are welded into an integral structure.

[0116] It should be noted that this embodiment does not limit the specific value of the preset angle at which the first seat plate 402 and the third seat plate 404 are offset along the circumference of the tubular member 401. Those skilled in the art may set the angle based on actual needs to facilitate installation of various components connected to the lower connector 4. For example, the preset angle at which the first seat plate 402 and the third seat plate 404 are offset along the circumference of the tubular member 401 is 84°.

[0117] Furthermore, in some embodiments, a through hole 4011 is provided in the side wall of the tubular member 401, through which the tie rod 5 passes. In other words, in this embodiment, after the tie rod 5 passes through the through hole 4011, the two ends of the tie rod 5 are hinged to the upper folding arm 6 and the lower folding arm 2, respectively. By providing the through hole 4011 in the tubular member 401, the tie rod 5 is properly avoided, saving structural space.

[0118] In addition, in some embodiments, the length of the pull rod 5 is adjustable. Since the length of the pull rod 5 is adjustable, the length of the pull rod 5 can be adjusted during assembly to compensate for uneven force caused by processing errors.

[0119] It should be noted that this embodiment does not limit the specific structure of the pull rod 5, as long as its length is adjustable. In some embodiments, the pull rod 5 includes a pull rod body 501, a first pull rod head 502, a second pull rod head 503, a first nut 504 and a second nut 505, the first nut 504 and the second nut 505 are respectively welded to the two ends of the pull rod body 501, the first pull rod head 502 and the second pull rod head 503 are respectively provided with external threads, the first pull rod head 502 is threadedly connected to the first nut 504, and the second pull rod head 503 is threadedly connected to the second nut 505. When the length of the pull rod 5 needs to be adjusted, it is only necessary to screw the first pull rod head 502 and / or the second pull rod head 503. By changing the thread engagement length of the first pull rod head 502 and the first nut 504, and / or changing the thread engagement length of the second pull rod head 503 and the second nut 505, the length of the pull rod 5 can be fine-tuned. The structure is simple and the adjustment is convenient.

[0120] In some embodiments, the pull rod body 501 is a tubular member 401. This helps to reduce the weight of the pull rod 5.

[0121] In some embodiments, the first pull rod head 502 and the second pull rod head 503 are respectively provided with mounting holes, and two second bearings 506 are respectively installed in the two mounting holes to realize the hinge connection between the pull rod 5 and the upper folding arm 6 and the lower folding arm 2 respectively.

[0122] It should be noted that the above embodiments do not limit the specific structures of the upper connecting rod 7 and the lower connecting rod 3. In some embodiments, the upper connecting rod 7 and the lower connecting rod 3 have the same structure.

[0123] In some embodiments, at least one of the upper connecting rod 7 and the lower connecting rod 3 includes a connecting rod body 301, a fourth plate 302 provided at both ends of the connecting rod body 301, a sixth shaft sleeve 303 provided at both ends of the connecting rod body 301, and a fifth bearing 304 installed in the sixth shaft sleeve 303.

[0124] In some embodiments, the number of the upper connecting rods 7 and the number of the lower connecting rods 3 are both two.

[0125] In addition to the above-mentioned folding arm device, the present invention also provides an aerial work vehicle including the folding arm device disclosed in the above-mentioned embodiment. For the structures of other parts of the aerial work vehicle, please refer to the prior art and will not be described in detail herein.

[0126] It should also be noted that, in this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0127] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0128] The above is a detailed introduction to the folding arm device and aerial work vehicle provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A folding arm device, characterized in that: It includes a turntable (1), a lower folding arm (2), a lower connecting rod (3), a lower connecting body (4), a pull rod (5), an upper folding arm (6), an upper connecting rod (7), an upper connecting body (8), an arm (9), a folding arm oil cylinder (10) and an arm oil cylinder (11); The turntable (1) is used to connect to the chassis of the aerial work vehicle; The lower folding arm (2) and the lower connecting rod (3) are respectively hinged to the turntable (1) and the lower connecting body (4), and the lower folding arm (2), the lower connecting rod (3), the turntable (1) and the lower connecting body (4) form a parallelogram mechanism; The upper folding arm (6) and the upper connecting rod (7) are respectively hinged to the lower connecting body (4) and the upper connecting body (8), and the upper folding arm (6), the upper connecting rod (7), the lower connecting body (4) and the upper connecting body (8) form a parallelogram mechanism; The pull rod (5) is hinged to the lower folding arm (2) and the upper folding arm (6) respectively; One end of the arm (9) is hinged to the upper connector (8); The folding arm oil cylinder (10) is hinged to the lower folding arm (2) and the upper folding arm (6) respectively; The arm oil cylinder (11) is hinged to the upper connector (8) and the arm (9) respectively; When the folding arm device is in a folded state, the upper folding arm (6), the upper connecting rod (7), the lower folding arm (2), the lower connecting rod (3) and the arm frame (9) are parallel; The upper connector (8) comprises: Two symmetrically arranged first folding plates (801), a first pin (802) being connected between the tops of the two first folding plates (801), the first pin (802) being used to connect to the boom (9); a third oil cylinder support being connected between the bottoms of the two first folding plates (801), the third oil cylinder support being hinged to one end of the boom cylinder (11); Four first ear plates (803) are arranged in pairs on the outside of the two first folding plates (801), and the paired first ear plates (803) are connected with a second pin (804) and a third pin (805), the second pin (804) is connected to the upper folding arm (6), and the third pin (805) is connected to the upper connecting rod (7); The lower connector (4) comprises: Tubular member (401); The first seat plate (402), the second seat plate (403), the third seat plate (404), the fourth seat plate (405), the fifth seat plate (406) and the sixth seat plate (407) are sequentially arranged on the outer periphery of the tubular member (401) along the axial direction of the tubular member (401), wherein the first seat plate (402), the third seat plate (404), the fourth seat plate (405) and the sixth seat plate (407) have the same structure, and the second seat plate (403) and the fifth seat plate (406) have the same structure. The first seat plate (402) and the sixth seat plate (407) have the same orientation along the circumference of the tubular member (401); the third seat plate (404) and the fourth seat plate (405) have the same orientation along the circumference of the tubular member (401); the orientations of the first seat plate (402) and the third seat plate (404) along the circumference of the tubular member (401) are staggered by a preset angle; the second seat plate (403) and the fifth seat plate (406) have the same orientation along the circumference of the tubular member (401); Eight sixth pins (408), two of which are respectively provided between the first seat plate (402) and the second seat plate (403), between the second seat plate (403) and the third seat plate (404), between the fourth seat plate (405) and the fifth seat plate (406), and between the fifth seat plate (406) and the sixth seat plate (407); the two upper folding arms (6), the two upper connecting rods (7), the two lower folding arms (2) and the two lower connecting rods (3) are rotatably connected to the eight sixth pins (408) in a one-to-one correspondence.

2. The folding arm device according to claim 1, characterized in that: The arm (9) includes a first arm (901), a second arm (902), a third arm (903), and a fourth arm (904); the folding arm device also includes a telescopic oil cylinder (12); The first boom (901) is hinged to the upper connecting body (8) and the boom cylinder (11) respectively; the second boom (902) is slidably connected to the first boom (901); the third boom (903) is slidably connected to the second boom (902); and the fourth boom (904) is slidably connected to the third boom (903); The telescopic oil cylinder (12) is hinged to the first boom (901) and the second boom (902) respectively; the third boom (903) is telescopically linked with the second boom (902) via a chain; and the fourth boom (904) is telescopically linked with the third boom (903) via a chain.

3. The folding arm device according to claim 2, characterized in that: It also includes an upper extension arm (13), a lower extension arm (14), a fly arm connecting rod (15), a connecting arm (16), a fly arm cylinder (17), an upper leveling cylinder (18), a lower leveling cylinder (19), a rotary motor (20) and a working platform (21); One end of the upper extension arm (13) is hinged to the fourth boom (904), and the other end is hinged to the connecting arm (16) and the fly boom connecting rod (15) respectively; one end of the lower extension arm (14) is hinged to the fourth boom (904), and the other end is hinged to the fly boom connecting rod (15); the fourth boom (904), the upper extension arm (13), the lower extension arm (14) and the fly boom connecting rod (15) form a parallelogram mechanism; The fly arm oil cylinder (17) is hinged to the fourth boom (904) and the connecting arm (16) respectively; The fly arm cylinder (17) and the lower extension arm (14) are respectively coaxial with the connection points of the fourth boom (904); the connection points of the fly arm cylinder (17) and the connecting arm (16), and the connection points of the connecting arm (16) and the fly arm connecting rod (15) and the upper extension arm (13) are respectively coaxial; The lower leveling cylinder (19) is hinged to the upper connector (8) and the first arm (901) respectively; The upper leveling oil cylinder (18) is hinged to the fly arm connecting rod (15) and the connecting arm (16) respectively; the connection between the connecting arm (16) and the fly arm connecting rod (15) and the connection between the fly arm connecting rod (15) and the lower extension arm (14) are coaxial; The rotary motor (20) is connected to the connecting arm (16), and the working platform (21) is connected to the rotary motor (20).

4. The folding arm device according to any one of claims 1 to 3, characterized in that: The lower folding arm (2) comprises: Two lower folding arm bodies (201) arranged in parallel, wherein both ends of the two lower folding arm bodies (201) are respectively hinged to the turntable (1) and the lower connecting body (4); A first mounting member (202) is connected between the two lower folding arm bodies (201), with both ends of the first mounting member passing through the two lower folding arm bodies (201); Two first oil cylinder supports are respectively connected to the two ends of the first mounting member (202) and are respectively located outside the two lower folding arm bodies (201); the number of the folding arm oil cylinders (10) is two, and one end of the two folding arm oil cylinders (10) is respectively hinged to the two first oil cylinder supports; A second mounting member (203) is connected between the two lower folding arm bodies (201), with both ends of the second mounting member passing through the two lower folding arm bodies (201); Two tie rod supports are respectively connected to the two ends of the second mounting member (203) and are respectively located on the outside of the two lower folding arm bodies (201); there are two tie rods (5), and one end of the two tie rods (5) is respectively hinged to the two tie rod supports.

5. The folding arm device according to any one of claims 1 to 3, characterized in that: The upper folding arm (6) comprises: Two upper folding arm bodies (601) are arranged in parallel, and both ends of the two upper folding arm bodies (601) are hinged to the lower connecting body (4) and the upper connecting body (8) respectively; A second connecting member (602) is connected between the two upper folding arm bodies (601); Two second oil cylinder supports are respectively connected to the two upper folding arm bodies (601); the number of the folding arm oil cylinders (10) is two, and one end of the two folding arm oil cylinders (10) is respectively hinged to the two second oil cylinder supports; The U-shaped plate (603) is connected between the two upper folding arm bodies (601) and is respectively connected to the two second oil cylinder supports.

6. The folding arm device according to any one of claims 1 to 3, characterized in that: A fourth oil cylinder support is provided on the outer side of one of the first folding plates (801), and one end of the lower leveling oil cylinder (19) is hinged to the fourth oil cylinder support.

7. The folding arm device according to claim 1, characterized in that: A through hole (4011) is provided on the side wall of the tubular member (401), and the pull rod (5) passes through the through hole (4011).

8. The folding arm device according to claim 1, characterized in that: The length of the pull rod (5) is adjustable.

9. An aerial work vehicle, characterized in that: The invention comprises the folding arm device according to any one of claims 1 to 8.

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