CN112093737A - Crank arm and crank arm type aerial work platform - Google Patents
Crank arm and crank arm type aerial work platform Download PDFInfo
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- CN112093737A CN112093737A CN202011060076.5A CN202011060076A CN112093737A CN 112093737 A CN112093737 A CN 112093737A CN 202011060076 A CN202011060076 A CN 202011060076A CN 112093737 A CN112093737 A CN 112093737A
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- 230000007246 mechanism Effects 0.000 claims abstract description 41
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 206010066054 Dysmorphism Diseases 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/044—Working platforms suspended from booms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F13/00—Common constructional features or accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
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Abstract
The invention discloses a crank arm and a crank arm type aerial work platform, wherein the crank arm comprises an upper connecting body, the upper connecting body comprises a first concave base plate, a first folded plate and a shaft seat plate, a closed box-shaped structure is arranged on the first concave base plate, and a first hinge mechanism is arranged between the two closed box-shaped structures; the first folded plate is connected with the first concave base plate to form a first semi-closed box-shaped structure, and a second hinge mechanism is arranged between the two first semi-closed box-shaped structures; the shaft seat plate is fixed on the first concave base plate, and a third hinge mechanism is arranged between the shaft seat plate and the side wall of the first concave base plate; the crank arm type aerial work platform is provided with the crank arm. The closed box-shaped hinged stress structure can enhance the connection rigidity of the hinged part of the upper connecting body and the main arm; the simple support hinged stress structure formed among the shaft seat plate, the side wall of the first concave base plate and the third hinge mechanism can improve the connection rigidity of the hinged part of the upper connector and the upper folding arm.
Description
Technical Field
The invention relates to the field of aerial work platforms, in particular to a crank arm and a crank arm type aerial work platform.
Background
Aerial work platforms are widely used as equipment for transporting personnel, materials and tools to a designated position for operation due to the characteristics of flexibility and high efficiency. The crank arm of the existing crank arm type aerial work platform generally comprises a rotary table, a lower folding arm, a lower connecting rod, a lower connecting body, an upper folding arm, an upper connecting rod, an upper connecting body, a main arm and a work platform, wherein two ends of the lower folding arm and the lower connecting rod are respectively hinged on the rotary table and the lower connecting body, two ends of the upper folding arm and two ends of the upper connecting rod are respectively hinged on the upper connecting body and the lower connecting body, and the main arm is hinged on the upper connecting body, so that the upper connecting body and the lower connecting body are main force bearing parts.
However, the shaft sleeve part of the upper connecting body and the main arm of the existing crank arm type aerial work platform, the shaft sleeve part of the upper connecting body and the upper folding arm, and the shaft sleeve part of the lower connecting body and the upper connecting rod all have the problems of poor strength and rigidity, and the parts bear large load force, so the parts are easy to deform, and the motion stability and the operation safety of the crank arm are influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the crank arm and the crank arm type aerial work platform, and the crank arm of the crank arm type aerial work platform applying the crank arm moves more accurately and stably during work.
According to an embodiment of the present invention, a crank arm includes: main arm, main arm hydro-cylinder, leveling cylinder, go up connector, upward roll over the arm, go up connecting rod, lower connector, roll over the arm down, connecting rod, roll over the arm hydro-cylinder down, wherein it includes to go up the connector: the first concave base plate, two first folded plates and the axle seat plate. Two symmetrical closed box-shaped structures are arranged at the upper end of the side wall of the first concave base plate, and a first hinge mechanism used for connecting the main arm is arranged between the two closed box-shaped structures. The first folding plate is fixedly connected to the middle of the inner side of the side wall of the first concave base plate, the first concave base plate and the first folding plate are connected to form two symmetrical first half closed box-shaped structures, and a second hinge mechanism used for connecting the main arm oil cylinder and the upper connecting rod is arranged between the two first half closed box-shaped structures. The number of the shaft seat plates is two, the shaft seat plates are fixedly connected to the lower end of the first concave base plate, and a third hinge mechanism used for connecting the upward folding arm is arranged between each shaft seat plate and the side wall of the first concave base plate.
The crank arm according to the above embodiment of the invention has at least the following beneficial effects: the first hinge mechanism is arranged on the closed box-shaped hinge stress structure, so that the support mode of the shaft is improved, the bending moment at the shaft support position is reduced by a half, the connection rigidity of the hinge position of the upper connector and the main arm is enhanced to the maximum extent, the bending deformation of the hinge pin shaft is reduced, the adverse effect on the upper connector caused by the bending deformation of the hinge pin shaft is reduced, and the stress of a welding seam at the hinge position is reduced; a simple support hinged stress structure is formed among the shaft seat plate, the side wall of the first concave base plate and the third hinge mechanism, the simple support hinged stress structure can share the hinge force generated between the upper connector and the upper folding arm to the first concave base plate and the shaft seat plate, the bending moment of the shaft is reduced by half, the maximum position of the bending moment is far away from the groove plate and the shaft seat plate, the strength and the rigidity of the hinged position of the upper connector and the upper folding arm are improved to the maximum extent, the accurate transmission of the motion relation of the upper connector and the upper folding arm is ensured, the welding seam stress of the hinged position is reduced, and the cracking risk is reduced.
According to some embodiments of the invention, a connecting plate is provided between the two first semi-closed box-like structures.
According to some embodiments of the invention, each of the closed box-shaped structures includes a second folded plate and a surrounding plate, the surrounding plate is welded with the second folded plate and the side wall of the first concave base plate, the surrounding plate and the side wall of the first concave base plate are respectively provided with a coaxial first hinge hole, the first hinge mechanism includes two first shaft sleeves and a first shaft positioning sleeve, the first shaft sleeves are welded in the first hinge holes, the first shaft positioning sleeve is welded on the outer side of one of the side walls of the first concave base plate, and the axes of the first shaft sleeves, the first shaft positioning sleeve and the first hinge holes are coincident.
According to some embodiments of the invention, the second hinge mechanism comprises two second shaft sleeves and a second shaft positioning sleeve, wherein the side wall of the first concave base plate and the first folding plate are respectively provided with a coaxial second hinge hole, the second shaft sleeves are arranged in the first semi-closed box-shaped structure and welded on the side wall of the first concave base plate, the second shaft positioning sleeve is welded on the outer side of one side wall of the first concave base plate, and the axes of the second shaft sleeves, the second shaft positioning sleeve and the second hinge hole are overlapped.
According to some embodiments of the invention, the third hinge mechanism comprises: the shaft base plate is welded with a third shaft sleeve on the shaft base plate, a shaft ring on the inner side of the side wall of the first concave base plate and a third shaft positioning sleeve on the outer side of the side wall of the first concave base plate, the side wall of the first concave base plate and the shaft base plate are respectively provided with a coaxial third hinge hole, and the axes of the third shaft sleeve, the shaft ring and the third shaft positioning sleeve are superposed with the axis of the third hinge hole.
According to some embodiments of the invention, a coaxial fourth hinge hole is formed in one side wall of each of the axle seat plates and one end of each of the axle seat plates far away from the third axle sleeve, a fourth axle sleeve is arranged on one side of each axle seat plate facing the fourth hinge hole, and the leveling cylinder is connected with the upper connecting body through a pin shaft penetrating through the fourth hinge hole and the fourth axle sleeve.
According to some embodiments of the invention, the lower connector comprises: the second concave base plate, the U-shaped plate, the two first side plates and the vertical plate. The bottom of the second concave base plate is provided with a notch which is symmetrical about the left and right middle planes of the lower connecting body, two symmetrical second semi-closed box-shaped structures are arranged on two sides of the notch, and each second semi-closed box-shaped structure is provided with a fourth hinge mechanism used for connecting the upper connecting rod. The U-shaped plate is arranged between the side walls of the second concave base plate and located below the notch, and the outer edge periphery of the U-shaped plate and the second concave base plate are welded into a whole. The first side plate is arranged on the inner side of the side wall of the second concave base plate, the U-shaped plate and the first side plate are connected to form two symmetrical third semi-closed box-shaped structures, and a fifth hinge mechanism used for connecting the upward folding arm, the downward folding arm and the lower connecting rod is arranged between the two third semi-closed box-shaped structures. The number of the vertical plates is two, the vertical plates are fixedly connected to the U-shaped plate, and the two vertical plates are parallel to each other and are provided with sixth hinge mechanisms used for connecting the arm folding oil cylinders.
According to some embodiments of the invention, each of the second semi-closed box-like structures comprises a reinforcing plate, a profiled plate, a closing plate, arranged on the second concave base plate and parallel to the side walls thereof, and each of the fourth hinge mechanisms comprises a fifth bushing and a fourth shaft locating bushing. The second concave base plate is further provided with a second side plate parallel to the side wall of the second concave base plate, the second side plate is close to the edge of the notch, the lower end of the second side plate is welded on the U-shaped plate, and the second concave base plate, the reinforcing plate and the second side plate are provided with coaxial fifth hinge holes. The dysmorphism board welding the lateral wall of second spill base plate with between the reinforcing plate, the outer border periphery of shrouding with the reinforcing plate dysmorphism board with second spill base plate welding is as an organic whole. The fifth shaft sleeve is welded between the side wall of the second concave base plate and the reinforcing plate and penetrates through the reinforcing plate, and the fifth shaft sleeve is located on the outer side of the special-shaped plate and welded with the special-shaped plate. The fourth shaft locating sleeve is welded on the outer side of the side wall of the second concave base plate, and the axis of the fifth shaft sleeve, the axis of the fourth shaft locating sleeve and the axis of the fifth hinge hole coincide.
According to some embodiments of the invention, the profiled sheet portion is lap welded to the first side sheet.
Based on the same invention concept, the invention also provides a crank arm type aerial work platform which comprises a rotary table, a work platform and the crank arm in the embodiment, wherein the crank arm is arranged on the rotary table, and the work platform is arranged on a main arm of the crank arm.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of an upper connector according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a lower connecting body according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a crank arm according to an embodiment of the present invention.
Description of the drawings:
the main arm comprises a main arm 100, a main arm oil cylinder 200, a leveling oil cylinder 300, an upper folding arm 500, an upper connecting rod 600, a lower folding arm 800, a lower connecting rod 900, a folding arm oil cylinder 1000 and a rotary table 1100;
the upper connecting body 400, the first concave base plate 410, the closed box-shaped structure 411, the first hinge mechanism 420, the second flap 421, the enclosing plate 422, the first shaft sleeve 423, the first shaft positioning sleeve 424, the first hinge hole 425, the first flap 430, the first semi-closed box-shaped structure 440, the second hinge mechanism 450, the second shaft sleeve 441, the second shaft positioning sleeve 442, the second hinge hole 443, the third hinge mechanism 470, the third shaft sleeve 461, the collar 462, the third shaft positioning sleeve 463, the third hinge hole 464 and the connecting plate 480;
a shaft seat plate 460, a fourth hinge hole 451, a fourth shaft sleeve 452;
the lower connecting body 700, the second concave base plate 710, the notch 711, the second semi-closed box-shaped structure 712, the fourth hinge mechanism 720, the reinforcing plate 721, the special-shaped plate 722, the sealing plate 723, the fifth shaft sleeve 724, the fourth shaft positioning sleeve 725, the second side plate 726, the fifth hinge hole 727, the fabrication hole 728, the U-shaped plate 730, the first side plate 740, the third semi-closed box-shaped structure 741, the fifth hinge mechanism 750, the vertical plate 760 and the sixth hinge mechanism 770.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, installation, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
Referring to fig. 1 to 3, a crank arm according to an embodiment of the present invention includes a main arm 100, a main arm cylinder 200, a leveling cylinder 300, an upper connecting body 400, an upper folding arm 500, an upper connecting rod 600, a lower connecting body 700, a lower folding arm 800, a lower connecting rod 900, and a folding arm cylinder 1000. Wherein the upper connector 400 has a left-right structure symmetry, which includes: the first concave base plate 410, the two first folding plates 430 and the shaft seat plate 460.
Two symmetrical closed box-shaped structures 411 are arranged at the upper ends of the side walls of the left and right sides of the first concave base plate 410, and a first hinge mechanism 420 for connecting the main arm 100 is arranged between the two closed box-shaped structures 411.
The first folding plate 430 is a three-sided folding plate, the top of the two side plates of the folding plate is welded on the inner side of the side wall of the first concave base plate 410 and near the middle of the side wall, the side of the folding plate is vertically welded on the bottom surface of the first concave base plate 410, so as to form a first semi-closed box-shaped structure 440 with one open end, and a second hinge mechanism 450 for connecting the main arm cylinder 200 and the upper connecting rod 600 is arranged between the two first semi-closed box-shaped structures 440.
The number of the shaft seat plates 460 is two, the two shaft seat plates 460 are welded on the bottom surface of the first concave base plate 410 and are arranged in parallel, the two shaft seat plates 460 are close to the lower end of the first concave base plate 410, the shaft seat plates 460 are also parallel to the side wall of the first concave base plate 410, a third hinge mechanism 470 is arranged between the shaft seat plates 460 and the side wall of the first concave base plate 410, and an upper folding arm 500 is hinged to the third hinge mechanism 470.
In some embodiments of the present invention, a connecting plate 480 for reinforcing the structural strength of the upper connecting body 400 is disposed between the two first semi-closed box structures 440, the connecting plate 480 is a symmetrical octagonal flat plate including an upper side and a lower side, and a left side and a right side, two of the left side and the right side, which are located at different positions, are welded to the surface of the first folding plate 430, and the left side and the right side are welded to the side wall of the first concave base plate 410.
In some embodiments of the present invention, each of the closed box-shaped structures 411 includes a second flap 421 and a surrounding plate 422, and the first hinge mechanism 420 includes two first shaft sleeves 423 and a first shaft positioning sleeve 424. Second baffle 421 is the bending plate of two faces, bounding wall 422 is the U-shaped board that the top has the oblique angle, bounding wall 422's both sides limit welds the box structure of an organic whole with second baffle 421 and the lateral wall of first spill base plate 410 respectively, be equipped with coaxial first hinge hole 425 on the lateral wall of bounding wall 422 and first spill base plate 410 respectively, first axle sleeve 423 welds in first hinge hole 425, first axle position sleeve 424 welds on the right side lateral wall outside of first spill base plate 410, first axle sleeve 423, first axle location 424, the axis coincidence of first hinge hole 425.
In some embodiments of the present invention, the second hinge mechanism 450 includes two second shaft sleeves 441 and two second shaft positioning sleeves 442, the side wall of the first concave base plate 410 and the first flap 430 are respectively provided with a second hinge hole 443, the second shaft sleeves 441 are disposed between the side wall of the first concave base plate 410 and the first flap 430, the second shaft sleeves 441 are welded on the side wall of the first concave base plate 410, the second shaft positioning sleeves 442 are welded on the outer side of the right side wall of the first concave base plate 410, and the axes of the four second hinge holes 443 in this embodiment coincide with the axes of the second shaft sleeves 441 and 442.
In some embodiments of the present invention, the third hinge mechanism 470 includes: the third shaft sleeve 461 welded on the shaft seat plate 460, the collar 462 welded on the inner side of the side wall of the first concave base plate 410 and the third shaft positioning sleeve 463 welded on the outer side of the side wall of the first concave base plate 410, the side wall of the first concave base plate 410 and the shaft seat plate 460 are respectively provided with a coaxial third hinge connecting hole 464, and the axes of the third shaft sleeve 461, the collar 462 and the third shaft positioning sleeve 463 are coincident with the axis of the third hinge connecting hole 464.
In some embodiments of the present invention, a coaxial fourth hinge hole 451 is formed on an end of the shaft seat plate 460 away from the third shaft sleeve 461 and a left side wall of the first concave base plate 410, a fourth shaft sleeve 452 is welded to a position of the shaft seat plate 460 facing the fourth hinge hole 451, and the leveling cylinder 300 is connected to the upper connecting body 400 through a hinge shaft inserted into the fourth hinge hole 451 and the fourth shaft sleeve 452. Such a design may allow the axle plate 460 to be dual-purpose.
In some embodiments of the present invention, the lower connector 700 has a left-right structural symmetry, which includes: a second concave base plate 710, a U-shaped plate 730, two first side plates 740, and a vertical plate 760. The bottom of the second concave base plate 710 is provided with a notch 711, the notch 711 is symmetrical about the left and right middle planes of the lower connecting body 700, two symmetrical second semi-closed box-shaped structures 712 are arranged at two sides of the notch 711, and a fourth hinge mechanism 720 for connecting the upper link 600 is arranged on each second semi-closed box-shaped structure 712. The U-shaped plate 730 is disposed between the sidewalls of the second concave substrate 710 and below the notch 711, and the outer circumference of the U-shaped plate 730 is welded to the second concave substrate 710. The first side plate 740 is disposed inside a side wall of the second concave base plate 710, the U-shaped plate 730 and the first side plate 740 are connected to form two symmetrical third semi-closed box-shaped structures 741, and a fifth hinge mechanism 750 for connecting the upper folding arm 500, the lower folding arm 800 and the lower connecting rod 900 is disposed between the two third semi-closed box-shaped structures 741. Two vertical plates 760 are arranged and welded on the U-shaped plate 730, and the two vertical plates 760 are parallel to each other and are provided with a sixth hinge mechanism 770 for connecting the folding arm cylinder 1000.
In some embodiments of the present invention, each second semi-closed box-shaped structure 712 includes a reinforcing plate 721, a profiled plate 722 and a closing plate 723, which are disposed on the second concave base plate 710 and are parallel to the side walls thereof, and each fourth hinge mechanism 720 includes a fifth shaft sleeve 724 and a fourth shaft positioning sleeve 725. The second concave base plate 710 is further provided with a second side plate 726 parallel to the side wall thereof, the second side plate 726 is close to the edge of the notch 711 and the lower end thereof is welded to the U-shaped plate 730, and the second concave base plate 710, the reinforcing plate 721 and the second side plate 726 are provided with a fifth hinge hole 727 which is coaxial with each other. The profiled plate 722 is welded between the side wall of the second concave base plate 710 and the reinforcing plate 721. The outer periphery of the closing plate 723 is welded to the reinforcing plate 721, the profiled plate 722 and the second concave base plate 710 to form an integral box-shaped structure. The fifth shaft sleeve 724 is welded between the side wall of the second concave base plate 710 and the reinforcing plate 721 and is located outside the box-shaped structure, the fifth shaft sleeve 724 penetrates through the reinforcing plate 721, and part of the outer surface of the fifth shaft sleeve 724 and the special-shaped plate 722 are welded together. The fourth shaft locating sleeve 725 is welded to the outer sides of the left and right side walls of the second concave base plate 710, and the axes of the fifth shaft sleeve 724, the fourth shaft locating sleeve 725 and the fifth hinge hole 727 are coincident. The second concave base plate 710, the profiled plate 722 and the sealing plate 723 are welded into a semi-closed box-shaped hinged stress structure, so that the support strength and rigidity of the fifth shaft sleeve 724 can be greatly improved.
In some embodiments of the present invention, the second side plate 726 is provided with a tooling hole 728 to facilitate welding of the reinforcement plate 721.
In some embodiments of the present invention, the profiled plate 722 is partially lap welded to the first side plate 740, which facilitates the rational transmission of the structural stress streamlines, thereby greatly reducing the structural stress level and reducing the risk of weld stress and cracking.
The invention also provides a crank arm type aerial work platform, which comprises a rotary table 1100, a work platform (not shown) and the crank arm in the embodiment, wherein the lower folding arm 800 and the lower connecting rod 900 in the crank arm are hinged on the rotary table 1100, and the work platform is arranged on the main arm 100 of the crank arm.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a crank arm, includes main arm (100), main arm hydro-cylinder (200), leveling cylinder (300), upper connector (400), folded arms (500), upper connecting rod (600), lower connector (700), folded arms (800) down, lower connecting rod (900), folded arms hydro-cylinder (1000), its characterized in that, upper connector (400) include:
the device comprises a first concave base plate (410), two symmetrical closed box-shaped structures (411) are arranged at the upper end of the side wall of the first concave base plate, and a first hinge mechanism (420) used for connecting the main arm (100) is arranged between the two closed box-shaped structures (411);
two first folding plates (430), wherein the first folding plates (430) are fixedly connected to the middle parts of the inner sides of the side walls of the first concave base plate (410), the first concave base plate (410) and the first folding plates (430) are connected to form two symmetrical first semi-closed box-shaped structures (440), and a second hinge mechanism (450) for connecting the main arm oil cylinder (200) and the upper connecting rod (600) is arranged between the two first semi-closed box-shaped structures (440);
and two shaft seat plates (460) fixedly connected to the lower end of the first concave base plate (410), wherein a third hinge mechanism (470) for connecting the upward folding arm (500) is arranged between each shaft seat plate (450) and the side wall of the first concave base plate (410).
2. A crank arm according to claim 1 characterized in that a connecting plate (480) is provided between the two first semi-closed box-like structures (440).
3. A crank arm according to claim 1 or 2 characterized in that each closed box-like structure (411) comprises a second flap (421) and a collar (422), the coaming (422) is welded with the second folded plate (421) and the side wall of the first concave base plate (410) into a whole, the side walls of the coaming (422) and the first concave base plate (410) are respectively provided with a first coaxial hinge hole (425), the first hinge mechanism (420) comprises two first shaft sleeves (423) and a first shaft positioning sleeve (424), the first bushing (423) is welded in the first hinge hole (425), the first shaft positioning bushing (424) is welded on an outer side of one of the side walls of the first concave base plate (410), the axes of the first shaft sleeve (423), the first shaft positioning sleeve (424) and the first hinge hole (425) are coincident.
4. A crank arm according to claim 1 or 2, characterized in that the second hinge mechanism (450) comprises two second bushings (441), a second bushing (442), the side wall of the first concave base plate (410) and the first flap (430) being provided with a second coaxial hinge hole (443), respectively, the second bushings (441) being arranged inside the first semi-closed box-shaped structure (440) and being welded to the side wall of the first concave base plate (410), the second bushing (441) being welded to the outside of one of the side walls of the first concave base plate (410), the axes of the second bushings (441), the second bushing (442) and the second hinge hole (443) coinciding.
5. Crank arm according to claim 1 or 2, characterized in that the third hinging means (470) comprise: the shaft seat plate comprises a third shaft sleeve (461) welded on the shaft seat plate (460), a shaft ring (462) welded on the inner side of the side wall of the first concave base plate (410) and a third shaft positioning sleeve (463) welded on the outer side of the side wall of the first concave base plate (410), wherein the side wall of the first concave base plate (410) and the shaft seat plate (460) are respectively provided with a coaxial third hinge connection hole (464), and the axes of the third shaft sleeve (461), the shaft ring (462) and the third shaft positioning sleeve (463) are coincident with the axis of the third hinge connection hole (464).
6. The crank arm according to claim 5 wherein a coaxial fourth hinge hole (451) is formed on one side wall of each of the end of the axle seat plate (460) far away from the third axle sleeve (461) and the first concave base plate (410), a fourth axle sleeve (452) is formed on the side of the axle seat plate (460) facing the fourth hinge hole (451), and the leveling cylinder (300) is connected to the upper connecting body (400) through a pin shaft inserted into the fourth hinge hole (451) and the fourth axle sleeve (452).
7. Crank arm according to claim 1, characterized in that the lower connection body (700) comprises:
a second concave base plate (710) provided with a notch (711) at the bottom, wherein the notch (711) is symmetrical about the left-right middle plane of the lower connecting body (700), two symmetrical second semi-closed box-shaped structures (712) are arranged at two sides of the notch (711), and a fourth hinge mechanism (720) for connecting the upper connecting rod (600) is arranged on each second semi-closed box-shaped structure (712);
a U-shaped plate (730) disposed between sidewalls of the second concave substrate (710) and below the notch (711), an outer periphery of the U-shaped plate (730) being welded to the second concave substrate (710) as a single body;
two first side plates (740) arranged on the inner sides of the side walls of the second concave base plate (710), wherein the second concave base plate (710), the U-shaped plate (730) and the first side plates (740) are connected to form two symmetrical third semi-closed box-shaped structures (741), and a fifth hinge mechanism (750) for connecting the upper folding arm (500), the lower folding arm (800) and the lower connecting rod (900) is arranged between the two third semi-closed box-shaped structures (741);
the number of the vertical plates (760) is two, the vertical plates are fixedly connected to the U-shaped plate (730), and the two vertical plates (760) are parallel to each other and are provided with sixth hinge mechanisms (770) used for connecting the folding arm oil cylinders (1000).
8. A crank arm according to claim 7, characterized in that each of said second semi-closed box-like structures (712) comprises a reinforcement plate (721), a profiled plate (722), a closing plate (723) arranged on said second concave base plate (710) and parallel to its side walls, each of said fourth hinging means (720) comprises a fifth bushing (724), a fourth shaft locating bush (725);
a second side plate (726) parallel to the side wall of the second concave base plate (710) is further arranged on the second concave base plate (710), the second side plate (726) is close to the edge of the notch (711), the lower end of the second side plate is welded on the U-shaped plate (730), and coaxial fifth hinge holes (727) are formed in the second concave base plate (710), the reinforcing plate (721) and the second side plate (726);
the special-shaped plate (722) is welded between the side wall of the second concave base plate (710) and the reinforcing plate (721), and the outer periphery of the sealing plate (723) is welded with the reinforcing plate (721), the special-shaped plate (722) and the second concave base plate (710) into a whole;
the fifth shaft sleeve (724) is welded between the side wall of the second concave base plate (710) and the reinforcing plate (721) and penetrates through the reinforcing plate (721), and the fifth shaft sleeve (724) is located on the outer side of the special-shaped plate (722) and welded with each other;
and a fourth shaft positioning sleeve (725) is welded on the outer side of the side wall of the second concave base plate (710), and the axes of the fifth shaft sleeve (724), the fourth shaft positioning sleeve (725) and the fifth hinge hole (727) are coincident.
9. Crank arm according to claim 8, characterized in that the profiled sheet (722) is partially lap welded on the first side sheet (740).
10. A crank arm aerial work platform comprising a turntable (1100), a work platform, and further comprising a crank arm according to any one of claims 1 to 9 connected to the turntable and the work platform, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011060076.5A CN112093737A (en) | 2020-09-30 | 2020-09-30 | Crank arm and crank arm type aerial work platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011060076.5A CN112093737A (en) | 2020-09-30 | 2020-09-30 | Crank arm and crank arm type aerial work platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112093737A true CN112093737A (en) | 2020-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011060076.5A Pending CN112093737A (en) | 2020-09-30 | 2020-09-30 | Crank arm and crank arm type aerial work platform |
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| Country | Link |
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| CN (1) | CN112093737A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307196A (en) * | 2021-05-11 | 2021-08-27 | 江苏徐工工程机械研究院有限公司 | Bracket suitable for high-altitude operation |
| CN113353862A (en) * | 2021-07-20 | 2021-09-07 | 江苏徐工工程机械研究院有限公司 | Rotary table and overhead working truck |
-
2020
- 2020-09-30 CN CN202011060076.5A patent/CN112093737A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307196A (en) * | 2021-05-11 | 2021-08-27 | 江苏徐工工程机械研究院有限公司 | Bracket suitable for high-altitude operation |
| CN113307196B (en) * | 2021-05-11 | 2022-05-10 | 江苏徐工工程机械研究院有限公司 | Bracket suitable for high-altitude operation |
| CN113353862A (en) * | 2021-07-20 | 2021-09-07 | 江苏徐工工程机械研究院有限公司 | Rotary table and overhead working truck |
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