CN114314031B - Arched discharge arm with variable cross-section for wheel bucket excavator - Google Patents
Arched discharge arm with variable cross-section for wheel bucket excavator Download PDFInfo
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- CN114314031B CN114314031B CN202111389546.7A CN202111389546A CN114314031B CN 114314031 B CN114314031 B CN 114314031B CN 202111389546 A CN202111389546 A CN 202111389546A CN 114314031 B CN114314031 B CN 114314031B
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Abstract
The utility model provides a have variable cross section arch and unload arm for wheel hopper excavator, includes bending resistance belt conveyor (1) as bottom sprag structure with variable cross section supporting mechanism (2), and its technical essential is: the bending-resistant belt type conveying mechanism (1) comprises a driving motor speed reducer (11), a head roller assembly (15) and a tail roller assembly (16) which are arranged at the output end of the driving motor speed reducer (11) and connected through a belt, and a conveying frame assembly (14) which is used for providing bending-resistant support and connected with the variable cross-section supporting mechanism (2), wherein a carrier roller assembly is arranged at the bottom of the belt. The bending-resistant vibration reducer has the advantages of strong bending-resistant rigidity, contribution to stable structure of the whole machine, small vibration amplitude and the like.
Description
Technical Field
The invention relates to the field of strip mine, cement ports, bulk cargo storage yards and engineering machinery equipment, in particular to excavating machinery with a cantilever unloading structure, and specifically relates to an arched unloading arm with a variable cross section for a wheel bucket excavator.
Background
The existing discharge arm mechanism of the bucket-wheel excavator is designed in a linear fixed-section cantilever beam structure mode. The wheel bucket excavator utilizes the bucket wheel mechanism to rotate, and realizes the whole continuous excavating process of the bucket wheel excavator through a plurality of buckets arranged on the circumference of the bucket wheel mechanism. Because every scraper bowl all can all produce the vibration influence to the whole machine of equipment at the excavation in-process, when a plurality of scraper bowls excavate soil or ore in succession, can form a plurality of continuous vibrations of discontinuity to whole machine structure, and especially when excavating harder material, produce great amplitude very easily, consequently reduced the bending stiffness of unloading the arm, and easily cause the unloading arm whole fatigue, unstability. Secondly, the original unloading arm is heavy in total weight for guaranteeing the strength and rigidity of the beam structure, so that the change range of the gravity center of the whole machine is enlarged and the stability of the whole machine is reduced in the process of rotation and pitching movement of the unloading arm. Thirdly, for meeting the lowest unloading height of the bucket-wheel excavator, the bucket-wheel excavator can meet the requirement of the unloading height, the mode of increasing the stroke of the hydraulic cylinder is adopted in the prior art, namely the purchasing cost of the hydraulic cylinder is increased, and the cost of the hydraulic cylinder is very expensive compared with the cost of other standard parts. Therefore, reducing the stroke of the hydraulic cylinder reduces the cost of the equipment, and the stability of the equipment is one of the difficulties in equipment development while reducing the weight of the equipment.
Disclosure of Invention
The invention aims to provide an arch-shaped discharge arm with a variable cross section for a wheel bucket excavator, which fundamentally solves the problems and has the advantages of strong bending rigidity, contribution to the stable structure of the whole excavator, small vibration amplitude and the like.
In order to achieve the purpose, the invention provides the following technical scheme: this an arch arm of unloading that has variable cross section for wheel hopper excavator includes the bending resistance belt conveyor who uses variable cross section supporting mechanism as bottom sprag structure, and its technical essential is: the bending-resistant belt type conveying mechanism comprises a driving motor reducer, a head roller assembly, a tail roller assembly and a conveying frame assembly, wherein the head roller assembly and the tail roller assembly are arranged at the output end of the driving motor reducer and are connected through a conveying belt; the conveying frame assembly comprises a front conveying frame, a plurality of conveying frame side beams symmetrically arranged along the length direction of the variable cross-section supporting mechanism, conveying frame longitudinal beams connected between the adjacent conveying frame side beams, pull rod supporting beams vertically fixed on the conveying frame longitudinal beams, pull rod connecting plates which are perpendicular to the pull rod supporting beams along the length direction and have an included angle of less than or equal to 90 degrees with a belt, and pull rod assemblies arranged along the pull rod connecting plates.
Furthermore, the carrier roller component comprises a plurality of three carrier roller components with three degrees of freedom, which are arranged at the bottom of the bearing section of the conveying belt at intervals, a plurality of two carrier roller components which are limited at the return section of the conveying belt at intervals through the elasticity of chains, and a front-section return carrier roller component with a rotating shaft parallel to the head roller component.
Furthermore, variable cross section supporting mechanism includes arched steel skeleton, and this steel skeleton includes that a pair of support curb girder that extends along vertical downwardly extending sets up the skeleton roof beam subassembly between the support curb girder, and the skeleton roof beam subassembly includes upper portion crossbeam and the lower part crossbeam that the interval set up, sets up upper portion sloping subassembly and the lower part sloping subassembly in the wedge unit that comprises the crossbeam, sets up by circular sloping or H shaped steel sloping in turn between the adjacent wedge unit.
Furthermore, the longitudinal beam of the conveying frame is H-shaped steel.
The invention has the beneficial effects that: in the whole technical scheme, the arched conveying mechanism erected by the arched supporting structure is adopted, so that the bending rigidity of the discharging arm is guaranteed, the weight of the discharging arm is reduced, the stroke of a hydraulic cylinder is reduced, the gravity center change range in the whole machine operation process is reduced, the stability of the whole machine operation is improved, and meanwhile, in order to enhance the rigidity of the whole machine operation, the structures such as a bending-resistant connecting rod and a high-freedom carrier roller are arranged.
The variable cross-section supporting mechanism is provided with an arched variable cross-section unloading arm truss and consists of a plurality of variable cross-section wedge-shaped units, an included angle between the first variable cross-section wedge-shaped unit and the last variable cross-section wedge-shaped unit is n degrees, and adjacent units are connected with each other through welding or fasteners. A variable cross-section wedge-shaped unit consists of an I-shaped side beam, a middle transverse connection and a middle diagonal draw bar, and all the components are connected with each other through welding or fasteners.
The height of the cross section of the I-shaped side beam in the first variable cross-section wedge-shaped unit is not changed or gradually decreases from the head to the tail; in the second variable section wedge unit, the side member cross-sectional height is gradually reduced from the head to the tail. The thicknesses of the flange plates and the webs of the side beams are reduced, and compared with the thicknesses of the flange plates and the webs of the I-shaped side beams in the first variable cross-section wedge-shaped unit, the steps are reduced; the first variable cross-section wedge-shaped unit and the second variable cross-section wedge-shaped unit are connected with each other up and down through a diagonal draw bar, the web plate of the wedge-shaped I-shaped side beam is correspondingly butted with the upper flange plate and the lower flange plate, and the included angle between the upper flange plates of the side beams is N/N degrees.
Arranging a plurality of variable cross-section wedge-shaped units from the head part to the tail part of the discharging arm, sequentially corresponding to a first unit to an Nth unit, wherein the variable cross-section wedge-shaped units are connected with one another, and the cross-section height, the thickness of an upper flange plate and the thickness of a lower flange plate and the thickness of a web plate in the cross section of the wedge-shaped I-shaped side beam are gradually reduced in a step-by-step mode in the sequence from the head part to the tail part, so that the variable cross-section arch-shaped discharging arm truss with the included angle of N degrees is finally formed.
The anti-bending belt type conveying mechanism is provided with a carrier roller group support with an anti-bending structure, the carrier roller group support is continuously arranged from the head part to the tail part of the discharging arm in an extending way, and the carrier roller group support is formed by combining a channel steel type carrier roller support, a circular tube type anti-bending connecting rod, supporting legs and an outward extending connecting piece. The through long circular tubes and the connecting plates are connected into a whole, and the circular tube type bending-resistant connecting rod is formed after a plurality of through long circular tube-connecting plate combinations are connected in an up-and-down arrangement mode. The overhanging connecting rods and the supporting legs are arranged at intervals and are respectively connected with the channel steel type carrier roller bracket to form a supporting leg-carrier roller bracket-overhanging connecting rod assembly. And finally, connecting the circular tube type bending-resistant connecting rod with the overhanging connecting rod in the supporting leg-carrier roller support-overhanging connecting rod assembly to form the carrier roller set support with the bending-resistant structure.
In summary, the carrier roller group bracket with the bending-resistant structure can increase the bending-resistant rigidity of the discharging arm to a small extent, can prevent the material scattering phenomenon caused by the deviation of the conveying belt, and can effectively improve the bending-resistant strength of the discharging arm and reduce the vibration amplitude of the discharging arm.
Drawings
Fig. 1 is a schematic structural view of a conventional bucket wheel excavator.
Fig. 2 is an isometric side view schematic of a discharge arm of the present invention.
Fig. 3 is an exploded view of the discharge arm of the present invention.
Fig. 4 is a schematic front view of the discharge arm of the present invention in its length direction.
Fig. 4A isbase:Sub>A schematic sectional view of fig. 4 along the linebase:Sub>A-base:Sub>A.
Fig. 4B is a schematic cross-sectional view taken along line B-B in fig. 4.
Fig. 4C is a schematic cross-sectional view taken along line C-C of fig. 4.
Fig. 5 is a schematic sectional view of the discharge arm of the present invention along its length.
Detailed Description
The invention mainly aims at the improvement of the discharge arm assembly of the point filling part in fig. 1, and the content of the invention is explained in detail through specific embodiments in the following by combining fig. 2 to 5.
Main body structure of discharge arm
The main structure of the discharge arm takes the variable cross-section supporting mechanism 2 as the total supporting structure of the discharge arm, the variable cross-section supporting mechanism 2 is connected with a chassis of a wheel hopper excavator through a pitching fulcrum 26, a driving motor reducer 11 is fixed through a driving machine support 212 of a variable cross-section front end 21, a conveyor front end connection 211 is used for being fixed with a front bearing seat assembly 151 of a head roller assembly 15, the front bearing seat assembly 151 of the head roller assembly 15 is connected with the driving machine support 212, the rear bearing seat assembly 161 of a tail roller assembly 16 is matched through a conveyor end connection 231, a tail end rectangular frame 233 is additionally arranged on a variable cross-section tail end 23 for discharging ores conveyed by the bending-resistant belt type conveying mechanism 1 downwards from the tail end hopper 131, and meanwhile, in order to facilitate the fixed installation of the tail end hopper 131, a plurality of conveyor supporting bulges 232 are further arranged on the inner side of the tail end rectangular frame 233. The pedestrian walkway 27 is secured by the side supports 221 on the variable cross section mid end 22, the trailing diagonal member assembly 25 is hingedly secured by the front and rear lugs 222 and 223, and the trailing diagonal member assembly 25 and the pedestrian walkway 27 are of conventional construction in the art and the manner of securing is not described in detail.
Bending-resistant belt type conveying mechanism
The bending-resistant belt type conveying mechanism 1 comprises a driving motor reducer 11, a head roller assembly 15 and a tail roller assembly 16 which are arranged at the output end of the driving motor reducer 11 and connected through a conveying belt, a conveying frame assembly 14 which is used for providing bending-resistant support and connected with the variable cross-section supporting mechanism 2, a feeding assembly 12 and a return assembly 13 which are respectively used for a conveying belt bearing section and a conveying belt return section. A front chute 121 is fixed to the front conveyor frame 146 for accommodating ore transported by the digging arm conveyor mechanism and an end funnel 131 is provided at the end thereof for accommodating the discharge process of the discharge arm. The conveying frame assembly 14 comprises a front conveying frame 146, a plurality of conveying frame side beams 142 symmetrically arranged along the length direction of the variable cross-section supporting mechanism 2, conveying frame longitudinal beams 143 connected between the adjacent conveying frame side beams 142, pull rod supporting beams 144 vertically fixed on the conveying frame longitudinal beams 143, pull rod connecting plates 145 arranged along the length direction and perpendicular to the pull rod supporting beams 144, and included angles between the pull rod connecting plates and the belt are less than or equal to 90 degrees, and pull rod assemblies 141 arranged along the pull rod connecting plates 145. The carrier roller component comprises a plurality of three carrier roller components which are arranged at the bottom of the bearing section of the conveyer belt at intervals and have three degrees of freedom, a plurality of two carrier roller components which are limited at the return section of the conveyer belt at intervals through the elasticity of chains, and a head direction-changing roller component 133 of which the rotating shaft is parallel to the head roller component 15. The conveying frame longitudinal beams 143 are preferably made of H-shaped steel, and are gradually bent while not affecting the overall rigidity through the conveying frame longitudinal beams 143 connected end to end in sequence so as to be matched with the arch-shaped supporting structure.
With respect to the specific construction of the idler assembly, the belt is divided into two sections, an upper carrier section belt 122 and a lower return section belt 132 for ease of description. Wherein the upper carrier section conveyor belt 122 includes a front section feed idler assembly 123, a middle section feed idler assembly 124, and an end section feed idler assembly 125. The front section feeding idler assemblies 123 are used for folding the conveyor belt into a transition section of a trapezoidal structure, so that the groove angles between the front section feeding idler assemblies 123 are gradually increased to be the same as those of the middle section feeding idler assemblies 124, and enter the tail roller assembly 16 through the tail section feeding idler assembly 125 at the tail end of the feeding assembly 12 in a way that the groove angles are gradually reduced. Through adopting and bearing the trapezoidal cross-section of section conveyer belt 122, effectively avoided the sideslip of ore to drop. Since the lower return conveyor 132 does not need to carry materials, in order to match the roller connection structure of the middle feeding roller assembly 124 and to simplify the structure as much as possible, the middle return roller assembly 134 and the end return roller assembly 135 both adopt a hinged double roller structure, both sides of the double roller are hung by a chain, and the head direction-changing roller assembly 133 adopts a parallel single roller for matching the conveyor to return to the head roller assembly 15.
Variable cross-section supporting mechanism
The variable cross-section supporting mechanism 2 comprises an arched steel-structure framework, the steel-structure framework comprises a pair of supporting side beams extending downwards along the longitudinal direction, a framework beam assembly 24 is arranged between the supporting side beams, the framework beam assembly 24 comprises an upper cross beam 243 and a lower cross beam 244 which are arranged at intervals, and an upper oblique beam assembly 241 and a lower oblique beam assembly 242 which are arranged in a wedge-shaped unit (not marked in the figure) formed by the cross beams, and the variable cross-section supporting mechanism 2 is arranged into an arch shape by arranging a cuboid wedge-shaped unit structure. To increase the rigidity of the wedge unit, a splayed upper and lower sloping beam assembly 241, 242 are provided therein. Meanwhile, in order to enable the wedge-shaped units to have larger bending angles and ensure the structural rigidity, the adjacent wedge-shaped units are alternately arranged by circular oblique beams or H-shaped steel oblique beams.
Through the structure, the discharge arm truss of the wheel bucket excavator can be in an arch shape, and the included angle of the arch is 1-15 degrees.
Description of reference numerals:
1. the bending-resistant belt type conveying mechanism comprises a bending-resistant belt type conveying mechanism, a 11-drive motor speed reducer, a 12-feeding component, a 121-front-end guide chute, a 122-upper-bearing-section conveying belt, a 123-front-section feeding idler component, a 124-middle-section feeding idler component, a 125-end-section feeding idler component, a 13-return component, a 131 hopper, a 132-lower-return-section conveying belt, a 133-head redirection roller component, a 134-middle-section rollback idler component, a 135-end-section rollback idler component, a 14-conveying frame component, a 141-pull rod component, a 142-conveying-frame side beam, a 143-conveying-frame longitudinal beam, a 144-pull-rod supporting beam, a 145-pull rod connecting plate, a 146-front-conveying frame, a 15-front-roller component, a 151-front bearing seat component, a 16-rear-roller component and a 161 rear-bearing seat component;
2. a variable cross-section support mechanism, a 21 variable cross-section front end, a 211 conveyor front end connection, a 212 drive machine support, a 22 variable cross-section middle end, a 221 side support, a 222 front lug, a 223 rear lug, a 23 variable cross-section end, a 231 conveyor end connection, a 232 conveyor support boss, a 233 end rectangular frame, a 24 skeleton beam assembly, a 241 upper oblique beam assembly, a 242 lower oblique beam assembly, a 243 upper beam, a 244 lower beam, a 25 pulling oblique beam assembly, a 26 pitching fulcrum, and a 27 pedestrian walkway.
Claims (4)
1. A discharge arm with variable-section arch for a wheel hopper excavator, comprising a bending-resistant belt conveyor (1) with a variable-section support mechanism (2) as a bottom support structure, characterized in that: the bending-resistant belt type conveying mechanism (1) comprises a driving motor speed reducer (11), a head roller assembly (15) and a tail roller assembly (16) which are arranged at the output end of the driving motor speed reducer (11) and connected through a belt, and a conveying frame assembly (14) which is used for providing bending-resistant support and connected with the variable cross-section supporting mechanism (2), wherein a carrier roller assembly is arranged at the bottom of the belt; the conveying frame assembly (14) comprises a front conveying frame (146), a plurality of conveying frame side beams (142) symmetrically arranged along the length direction of the variable cross-section supporting mechanism (2), conveying frame longitudinal beams (143) connected between the adjacent conveying frame side beams (142), pull rod supporting beams (144) vertically fixed on the conveying frame longitudinal beams (143), pull rod connecting plates (145) which are perpendicular to the pull rod supporting beams (144) along the length direction and have an included angle of less than or equal to 90 degrees with a belt, and pull rod assemblies (141) arranged along the pull rod connecting plates (145);
the variable cross-section supporting mechanism is provided with an arched variable cross-section unloading arm truss and consists of a plurality of variable cross-section wedge-shaped units, an included angle between the first variable cross-section wedge-shaped unit and the last variable cross-section wedge-shaped unit is n degrees, and adjacent units are connected with each other through welding or fasteners; a variable cross-section wedge-shaped unit consists of an I-shaped side beam, a middle transverse connection and a middle diagonal draw bar, and all the parts are connected with each other through welding or fasteners.
2. The arched discharge arm with variable cross-section for a wheel hopper excavator of claim 1, wherein: the carrier roller component comprises a plurality of three carrier roller components which are arranged at the bottom of the upper bearing section at intervals and have three degrees of freedom, a plurality of two carrier roller components which are limited on the lower bearing section at intervals through the elasticity of a chain, and a head redirection roller component (133) of which the rotating shaft is parallel to the head roller component (15).
3. The discharge arm with variable cross-section arch for a wheel hopper excavator according to claim 1 or 2, characterized in that:
the variable cross-section supporting mechanism (2) comprises an arched steel structure framework, the steel structure framework comprises a pair of supporting side beams extending downwards along the longitudinal direction, a framework beam assembly (24) is arranged between the supporting side beams, the framework beam assembly (24) comprises upper cross beams (243) and lower cross beams (244) which are arranged at intervals, upper oblique beam assemblies (241) and lower oblique beam assemblies (242) which are arranged in wedge-shaped units formed by the cross beams, and round oblique beams or H-shaped steel oblique beams are alternately arranged between the adjacent wedge-shaped units.
4. The discharge arm with variable cross-section arch for a wheel hopper excavator of claim 3 wherein: the conveying frame longitudinal beam (143) is H-shaped steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111389546.7A CN114314031B (en) | 2021-11-23 | 2021-11-23 | Arched discharge arm with variable cross-section for wheel bucket excavator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111389546.7A CN114314031B (en) | 2021-11-23 | 2021-11-23 | Arched discharge arm with variable cross-section for wheel bucket excavator |
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| CN114314031A CN114314031A (en) | 2022-04-12 |
| CN114314031B true CN114314031B (en) | 2023-03-17 |
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| CN202111389546.7A Active CN114314031B (en) | 2021-11-23 | 2021-11-23 | Arched discharge arm with variable cross-section for wheel bucket excavator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116374483B (en) * | 2023-06-05 | 2023-08-04 | 四川皓德斯新材料科技有限公司 | Conveyor |
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| CN203127779U (en) * | 2013-03-22 | 2013-08-14 | 中联重科物料输送设备有限公司 | Belt conveyor |
| CN203173519U (en) * | 2013-04-22 | 2013-09-04 | 李魁魁 | Grain and grain material harvest machine |
| CN104328811A (en) * | 2014-11-26 | 2015-02-04 | 北方重工集团有限公司 | Mining type compact bucket wheel excavator |
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| CN106276058A (en) * | 2016-09-26 | 2017-01-04 | 原平市丰汇机械制造有限公司 | Flexible traveling, bending operating unicorn block belt feeder |
| CN212558004U (en) * | 2020-06-28 | 2021-02-19 | 山东海汇环保设备有限公司 | Novel integral truss conveyer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018109498A1 (en) * | 2018-02-23 | 2019-08-29 | Liebherr-Components Biberach Gmbh | Bucket wheel excavator and method for controlling a bucket wheel excavator |
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2021
- 2021-11-23 CN CN202111389546.7A patent/CN114314031B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043614U (en) * | 1988-05-04 | 1989-08-30 | 湖南省交通科学研究所 | Light feeder for bulk materials |
| CN1172196A (en) * | 1996-07-15 | 1998-02-04 | 克鲁勃工业技术有限公司 | Bucket dredger attack method |
| CN101734465A (en) * | 2009-11-24 | 2010-06-16 | 南通海鹰机电集团有限公司 | Air-floating type conveyor |
| CN203127779U (en) * | 2013-03-22 | 2013-08-14 | 中联重科物料输送设备有限公司 | Belt conveyor |
| CN203173519U (en) * | 2013-04-22 | 2013-09-04 | 李魁魁 | Grain and grain material harvest machine |
| CN104973427A (en) * | 2014-04-01 | 2015-10-14 | 宜昌力道起重机械有限公司 | Tyre type stacker-reclaimer |
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| CN106276058A (en) * | 2016-09-26 | 2017-01-04 | 原平市丰汇机械制造有限公司 | Flexible traveling, bending operating unicorn block belt feeder |
| CN212558004U (en) * | 2020-06-28 | 2021-02-19 | 山东海汇环保设备有限公司 | Novel integral truss conveyer |
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