CN114197551B

CN114197551B - Discharge arm slewing mechanism for wheel bucket excavator

Info

Publication number: CN114197551B
Application number: CN202111389553.7A
Authority: CN
Inventors: 冯学慧; 宋波; 王忠鑫; 刘畅; 陈洪亮; 王辉; 郭明敏; 梁媛媛; 栾世奇
Original assignee: Ccteg Shenyang Engineering Co ltd
Current assignee: Ccteg Shenyang Engineering Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-11-22
Anticipated expiration: 2041-11-23
Also published as: CN114197551A

Abstract

The utility model provides a discharge arm rotation mechanism for wheel bucket excavator, its technical essential is: an adjusting plate assembly is arranged between the supporting base assembly and the rotary supporting assembly, the supporting base assembly is fixed on a walking mechanism of the equipment, a free inclination angle in a limited range of the advancing direction can be formed between the supporting base assembly and the adjusting plate assembly, the free inclination angle can freely slide along a bearing seat slide way, meanwhile, the adjusting plate assembly and the rotary supporting assembly can freely slide along an upper connecting shaft slide way, and the rotary supporting assembly and the adjusting plate assembly are supported on the supporting base assembly in a self-adaptive mode. The rigid impact of the travelling mechanism on the slewing bearing can be effectively reduced by a self-adaptive matching error compensation mode, the accumulated errors in the installation, manufacturing and operation processes can be effectively absorbed, the stress condition and the meshing transmission precision of the gear are improved, and the stability of the whole bucket-wheel excavator is improved.

Description

Discharge arm slewing mechanism for wheel bucket excavator

Technical Field

The invention relates to engineering mechanical equipment for strip mines, cement ports, bulk cargo storage yards and engineering machinery, in particular to excavating machinery with a centrifugal wheel, a roller or a throwing device, and particularly relates to a discharge arm slewing mechanism for a bucket wheel excavator.

Background

As shown in fig. 1, the invention patent application with application publication No. CN1172196A discloses a common bucket wheel excavator, and manufacturers of such excavators mainly include santvick (santvik), KRUPP (KRUPP), and so on. This kind of excavator mainly including the rotatory bucket wheel that can realize incessant excavation that is located the front end, with the receiving conveyer belt that the ore transported out in the bucket wheel, will receive the conveyer belt that unloads that the ore was derived from the afterbody on the conveyer belt, the supporting mechanism of the conveyer belt of unloading then is called unloading arm or unloads the arm.

The existing discharging arm rotating mechanism is directly arranged on a chassis of a walking mechanism through an outer tooth type rotating bearing, and a driving gear directly drives a rotating platform to rotate through the outer tooth type rotating bearing so as to realize the rotation of the discharging arm. However, the device is bulky in volume and weight and adopts all-steel connection, so that the service life of the connecting piece is greatly influenced. Secondly, the poor vibration that causes equipment to produce irregular jolting at the in-process of marcing of operating mode road surface roughness, and the vibration can directly feed back gear engagement department through the running gear chassis, makes its atress uneven, causes the meshing face nonlinear contact between the gear, has increased the wearing and tearing between the part, and then leads to gear inefficacy, driving motor operation unstable, gyration support receive the unfavorable condition such as impact great, aggravation discharge arm vibration. Thirdly, due to the large size of the excavator components, the excavator components can hardly be transported to the site after being assembled by manufacturers in a road transportation mode, and can only be assembled on the site. Although the standardization of installation and assembly can be realized macroscopically due to the difference between the temperature and the humidity of the production environment and the temperature and the humidity of the installation environment, the assembly method of different workers still has slight difference, and accumulated errors are generated during assembly and use. For example, errors caused by welding deformation of a chassis steel structure of the travelling mechanism, errors caused by deformation of the steel structure due to bumping in a transportation process, errors caused by the screwing degree of a bolt assembly in a field installation process and inconsistent embedding degree among components and the like. In order to meet the high-precision requirement of gear meshing, an additional finishing and debugging step is required, so that manpower and material resources are consumed, and the field installation efficiency is greatly reduced.

In the prior art, an elastic vibration damping mechanism is mostly adopted to isolate a running mechanism in a self-adaptive compensation mode, such as a hydraulic damping shock absorber, an air damping shock absorber, a rubber shock absorber and the like. In the technical scheme disclosed in the publication number WO9966134A1, the vibration isolation is realized by the cooperation of laminated rubber and an oil cylinder. The technical scheme disclosed in publication number JP2006069233A realizes adaptive vibration compensation with a rubber pad composite structure. And spring dampers common in the related art, such as suspension damping systems for motor vehicles. However, the above-mentioned vibration damping is susceptible to the influence of the ambient temperature and humidity, and cannot completely cope with a complicated external environment. In addition, when the load is small, the vibration at the lower part of the actuating mechanism can be effectively compensated in a self-adaptive mode by adopting the technical scheme, but along with the gradual increase of the load, the vibration is limited by physical properties such as the tensile strength and the compressive strength of the material, a preparation process and the like, and the existing vibration damping mechanism is difficult to meet the requirement of resisting rigid impact under the high-load condition of an ultra-large machine.

Disclosure of Invention

The invention provides a discharge arm slewing mechanism for a bucket wheel excavator, which fundamentally solves the problems, can effectively reduce the rigid impact of a travelling mechanism on a slewing bearing in a self-adaptive matching error compensation mode, can effectively absorb the accumulated error in the installation, manufacture and operation processes, improves the stress condition and the meshing transmission precision of a gear, and improves the overall stability of the bucket wheel excavator.

The technical scheme adopted by the invention for realizing the purpose is as follows: this a discharge arm rotation mechanism for wheel bucket excavator includes by lower supreme support base subassembly and the gyration supporting component that sets gradually, and its technical essential is: the adjusting plate assembly is arranged between the supporting base assembly and the rotating supporting assembly, the supporting base assembly is fixed on a travelling mechanism of the equipment, a free inclination angle in a limited range of a forward direction can be formed between the supporting base assembly and the adjusting plate assembly, the adjusting plate assembly can freely slide along matching surfaces between the supporting base assembly and the adjusting plate assembly, meanwhile, the adjusting plate assembly and the rotating supporting assembly can freely slide along matching surfaces between the adjusting plate assembly and the rotating supporting assembly, and the rotating supporting assembly and the adjusting plate assembly are supported on the supporting base assembly in a self-adaptive mode.

The adjusting plate component comprises an adjusting plate, symmetrically arranged bearing seats, symmetrically arranged bearing seat slideways and symmetrically arranged upper connecting shaft slideways, and the central lines of the symmetrically arranged bearing seat slideways and the symmetrically arranged upper connecting shaft slideways are always vertical and the middle points of the symmetrically arranged bearing seat slideways and the symmetrically arranged upper connecting shaft slideways are coincided; the upper connecting shaft can freely slide along the upper connecting shaft slideway, the bearing seat can freely slide along the bearing seat slideway, and the free inclination angle in the limited range of the advancing direction can be realized through the joint bearing.

Furthermore, a pair of bearing seat slideways which are centrosymmetric and a pair of upper connecting shaft slideways which are centrosymmetric are arranged on the adjusting plate, the central lines of the two pairs of slideways are mutually vertical, and the middle points of the two pairs of slideways are overlapped.

The lower connecting shaft is connected to the supporting base assembly through a bearing seat, and the upper connecting shaft is connected to the transmission gear assembly;

the lower connecting shaft is in sliding fit on the bearing seat slideway through a bearing seat provided with a joint bearing, and the upper connecting shaft is in sliding fit on the upper connecting shaft slideway through a processing plane positioned at the shaft end of the upper connecting shaft.

Furthermore, the rotary supporting component comprises a transmission gear component in sliding fit with the adjusting plate component, a central shaft component with the shaft end limited on the transmission gear component, a driving device with the output end matched with the transmission gear component, an inner rotary table coaxially matched with the transmission gear component through the central shaft component, and an outer rotary table matched with the inner rotary table through a toothless rotary bearing.

The invention has the beneficial effects that: in the whole technical scheme, an adjusting plate assembly is arranged between a supporting base assembly and a rotary supporting assembly to isolate the vibration and the impact of the travelling mechanism from an inner rotary table; the inner rotary table is installed on the outer rotary table, and two pairs of bearing seat slide ways and fixed shaft slide ways which are in sliding fit and are mutually perpendicular and crossed are arranged on the same installation plane on the adjusting plate assembly. Through the mode of flexible anti vibration structure, finally realize diversified self-adaptation adjustment, compensated the accumulative error that produces in manufacturing, transportation, assembly and the use, eliminated the gear meshing precision that arouses by the accumulative error poor, reduce life's problem, guaranteed that interior revolving platform rotates steadily, discharge arm gyration is steady promptly, has guaranteed the stability of equipment operation.

In the adjusting plate component, in a U-shaped opening of an adjusting plate, a lower connecting shaft, a bearing seat and a bearing seat slideway, and an upper connecting shaft slideway are matched to facilitate sliding fit and assembly, and a corresponding sliding surface is processed in the production process of the adjusting plate. In order to realize the self-adaptive compensation of the unfavorable vibration generated by the walking mechanism, the adjusting plate assembly adopts a flexible vibration damping mechanism matched with a joint bearing in a sliding manner.

In conclusion, the invention has the advantages of simple and compact structure, high stability, good safety and the like.

Drawings

Fig. 1 is a schematic structural view of a conventional bucket-wheel excavator.

Fig. 2 is a schematic cross-sectional view of the swing mechanism of the present invention.

Fig. 2A isbase:Sub>A schematic cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2.

Fig. 2A-1 is a partially enlarged schematic view of a central shaft assembly portion of fig. 2A.

Fig. 2A-2 are enlarged partial schematic views of the mount portion of fig. 2A.

Fig. 2B is a schematic cross-sectional view taken along line B-B of fig. 2.

Fig. 2C is a schematic cross-sectional view of fig. 2 taken along line C-C.

Fig. 2D is a schematic cross-sectional view taken along line D-D of fig. 2.

Fig. 2E is a schematic cross-sectional view of fig. 2 along line E-E.

FIG. 2F is an enlarged, fragmentary, schematic view of the connection of the upper adapter shaft of FIG. 2 to the drive gear assembly.

FIG. 3 is a reference diagram of the usage status of the swing mechanism of the present invention.

Fig. 4 is a side view of the structure of fig. 3.

Fig. 5 is a bottom view of fig. 3.

Fig. 6 is a schematic view of the anti-vibration principle of the slewing mechanism of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific examples with reference to FIGS. 2 to 6.

Discharge arm rotating mechanism

As shown in fig. 2 and 2A, the discharge arm swing mechanism for the wheel hopper excavator mainly includes, from bottom to top, a support base assembly 2, an adjustment plate assembly 4, and an adjustment swing support assembly 3. The supporting base assembly 2 is fixed on the traveling mechanism 1 of the device itself, and the adjusting plate assembly 4 connects the rotary supporting assembly 3 and the supporting base assembly 2 in a self-adaptive manner through two pairs of upper connecting shafts 46 and lower connecting shafts 44 which are connected with the axes of the two pairs of shafts and are vertically crossed with each other.

As shown in fig. 2A-1, a center shaft assembly 37 capable of rotating freely is installed at the rotation center of the inner rotary table 38, the center shaft assembly 37 includes a center shaft 372 having upper and lower ends provided with rolling bearings 371, the rolling bearings 371 are positioned by center bearing positioning sleeves 34 limited at the upper and lower ends of the inner rotary table 38, an upper shaft end baffle 373 is arranged at the upper shaft end of the center shaft 372, the lower shaft end of the center shaft 372 extends out of the inner rotary table 38 and is positioned by a center shaft sleeve 375 limited in the gear ring 321 and a lower shaft end baffle 376, the middle part of the center shaft 372 is positioned by a spacing sleeve 374 limited between the upper and lower rolling bearings 371, and the center shaft 372 is firmly limited by the above structure. By providing the center sleeve 375 and the two pairs of center bearing positioning sleeves 34, the transmission gear assembly 32 is independent of the inner turntable 38, so that the transmission gear assembly can freely rotate around the center shaft assembly 37 without interfering with each other.

The overall structure is further described below with reference to fig. 2A to 2E in the order from bottom to top in fig. 2.

As shown in fig. 2A-2 and 2B, a pair of lower engaging shafts 44 are symmetrically retained on the mounting base 21 located at the topmost part of the support base assembly 2 by lower engaging bosses 441, and lower engaging shaft end stoppers 442 are provided at the ends of the lower engaging bosses 441. For convenience of production and assembly, the supporting base assembly 2 is disassembled into multiple stages of pipe fittings connected through flanges, for example, in this embodiment, a two-stage assembly composed of an upper central pipe 22 and a lower central pipe 23 is adopted, and the lower central pipe 23 is fixed on the traveling mechanism 1, so that the central pipe is fixed in the circumferential direction.

As shown in fig. 2A, 2A-2, 2C and 5, the adjusting plate 43 has a symmetrical structure, preferably an octagon, two sets of opposite sides of which are respectively provided with a pair of U-shaped grooves, the inside of the opening is provided with a bearing seat slideway 41 and a fixed shaft slideway 42, the opposite sides of the bearing seat 47 and the bearing seat slideway 41 are provided with matching surfaces, so that the bearing seat 47 is slidably matched on the bearing seat slideway 41, and the inside of the bearing seat 47 is movably connected with the upper end of the lower connecting shaft 44 through a joint bearing 45. The circumferential surface of the lower extending end of the upper connecting shaft 46 is processed into a matching plane which is in sliding fit with the upper connecting shaft slide way 42 of the adjusting plate 43, so that the driven gear assembly 32 and the adjusting plate 43 can freely slide along the matching plane, the sliding surfaces of the slide ways are two processing surfaces which are parallel to each other, and the slide ways are respectively matched with the parallel processing surfaces of the extending end of the upper connecting shaft 46. On the adjusting plate 43, the axis connecting line of the upper connecting shaft 46 and the axis connecting line of the lower connecting shaft 44 are mutually perpendicular and the middle points are superposed, so that the front, back, left, right, upper and lower self-adaptive adjustment of the gear ring 321 relative to the fixed central tube is realized, and the purpose of stably transmitting torque is achieved.

As shown in fig. 2D and 2F, the driven gear assembly 32 mainly includes a gear ring 321 and a gear plate 322, a central shaft sleeve 375 for limiting a lower end of the central shaft 372 is disposed at a center of the gear plate 322, the upper connecting shaft 46 is symmetrically limited on the gear plate 322 by an upper connecting shaft sleeve 461, and the gear plate 322 is engaged with the driving gear 311.

As shown in fig. 2 and 2E, the inner rotary table 38 is a cylindrical structure, and the inner ring of the toothless rotary support 36 and the outer edge of the inner rotary table 38, and the outer ring of the toothless rotary support 36 and the inner edge of the outer rotary table 35 can be fixed by flange connection. The center of the inner rotary table 38 limits the central shaft assembly 37 through the central bearing locating sleeve 34, the upper part of the inner rotary table 38 is limited by the symmetrical limiting driving device 31 (mainly comprising a driving motor and a speed reducer) of a supporting structure and a pair of symmetrically arranged discharging arm hinged supports 33, the driving gear 311 is assembled on the driving output shaft 312 of the driving device 31, the outer edge of the inner rotary table 38 is connected with the outer rotary table 35 through the toothless rotary bearing 36, and the outer rotary table 35 is rigidly connected with the travelling mechanism 1.

As shown in fig. 6, the mounting base 21, the adjusting plate 43 and the transmission gear assembly 32 are sequentially arranged from bottom to top, the driving gear 311 engaged with the rotation support assembly 3 is connected to the inner rotary table 38 on the upper portion of the central shaft 372, the pair of upper connecting shafts 46 connected to the adjusting plate 43 is always perpendicular to the rotation support assembly 3, the pair of lower connecting shafts 44 connected to the adjusting plate 43 is always perpendicular to the support base assembly 2, the lower connecting shafts 44 drive the bearing seats 47 to synchronously slide along the ± X axis direction, the upper connecting shafts 46 can synchronously slide along the ± Y axis, the upper connecting shafts 46 are always parallel to the central shaft 372 positioned by the central shaft sleeve 375, the support base assembly 2 and the adjusting plate assembly 4 can have a free inclination angle in a limited range of the advancing direction and can freely slide along the matching surfaces therebetween, and at the same time, the adjusting plate assembly 4 and the rotation support assembly 3 can freely slide along the matching surfaces therebetween.

In principle, support base assembly 2 and gyration support assembly 3 are separated through regulating plate assembly 4 to direct rigid connection between support base assembly 2 and gyration support assembly 3 has been avoided.

In the concrete structure, the outer rotary table 35 is rigidly connected with the traveling mechanism 1, the inner rotary table 38 is supported on the outer rotary table 35 through a toothless rotary bearing 36, a pair of driving devices 31 are arranged on the inner rotary table 38, and the tail end structure of the driving devices is a driving gear 311 which is a first action unit; the supporting base assembly 2 is rigidly connected with the traveling mechanism 1, the driven gear assembly 32 is connected with the supporting base assembly 2 through the adjusting plate assembly 4, and the end structure of the driven gear assembly is a gear ring 321 which is a second action unit. When the traveling mechanism 1 acts, the first action unit and the second action unit are deviated, in the prior art, the two action units are rigidly matched, so high-precision meshing cannot be realized, the above-mentioned accumulated error further reduces the meshing precision, and the accumulated error is compensated through the arrangement and the corresponding matching relationship of the adjusting plate assembly 4, the joint bearing 45, the upper connecting shaft 46 and the lower connecting shaft 44, so that the gear meshing precision is improved, and the contact stress between meshing teeth is effectively reduced.

Description of reference numerals:

1. a traveling mechanism;

2. a support base assembly, a 21 mounting base, a 22 upper center tube, and a 23 lower center tube;

3. the rotary support assembly, the drive device 31, the drive gear 311, the drive output shaft 312, the driven gear assembly 32, the gear ring 321, the 322 fluted disc, the 33 lifting hook, the center bearing positioning sleeve 34, the outer rotary table 35, the toothless rotary bearing 36, the center shaft assembly 37, the 371 rolling bearing, the 372 center shaft, the 373 upper shaft end baffle plate, the 374 spacer sleeve, the 375 center shaft sleeve, the 376 lower shaft end baffle plate and the 38 inner rotary table;

4. the adjusting plate component, a 41 bearing seat slideway, a 42 upper connecting shaft slideway, a 43 adjusting plate, a 44 lower connecting shaft, a 441 lower connecting shaft sleeve, a 442 lower connecting shaft end baffle plate, a 45 joint bearing, a 46 upper connecting shaft, a 461 upper connecting shaft sleeve, a 462 upper connecting shaft end baffle plate and a 47 bearing seat.

Claims

1. The utility model provides a discharge arm rotation mechanism for wheel bucket excavator, includes by lower supreme support base subassembly (2) and the gyration supporting component (3) that set gradually, its characterized in that: an adjusting plate assembly (4) is arranged between the supporting base assembly (2) and the rotary supporting assembly (3), the supporting base assembly (2) is fixed on a travelling mechanism (1) of the equipment, a free inclination angle in a limited advancing direction range can be arranged between the supporting base assembly (2) and the adjusting plate assembly (4), and the rotary supporting assembly (3) and the adjusting plate assembly (4) are supported on the supporting base assembly (2) in a self-adaptive manner;

the adjusting plate assembly (4) comprises an adjusting plate (43), symmetrically arranged bearing seats (47), symmetrically arranged bearing seat slideways (41) and symmetrically arranged upper connecting shaft slideways (42), wherein the bearing seat slideways (41) and the upper connecting shaft slideways (42) are arranged on the adjusting plate (43);

the center lines of the symmetrically arranged bearing seat slide ways (41) and the symmetrically arranged upper connecting shaft slide ways (42) are always vertical and the middle points of the center lines are superposed; the upper connecting shaft (46) can freely slide along the upper connecting shaft slideway (42), the bearing seat (47) can freely slide along the bearing seat slideway (41), and a free inclination angle in a limited advancing direction range can be realized through the joint bearing (45);

the lower connecting shaft (44) is connected to the supporting base component (2) through a bearing seat (47), and the upper connecting shaft (46) is connected to the transmission gear component; the lower connecting shaft (44) is in sliding fit on the bearing seat slideway (41) through a bearing seat (47) provided with a joint bearing (45).

2. The discharge arm swing mechanism for a wheel hopper excavator according to claim 1, wherein: the upper connecting shaft (46) is in sliding fit on the upper connecting shaft slideway (42) through a processing plane positioned at the shaft end of the upper connecting shaft.

3. The discharge arm turning mechanism for a wheel hopper excavator according to claim 1 or 2, wherein: the rotary supporting component (3) comprises a transmission gear component in sliding fit with the adjusting plate component (4), a central shaft component (37) with the shaft end limited on the transmission gear component, a driving device (31) with the output end matched with the transmission gear component, an inner rotary table (38) coaxially matched with the transmission gear component through the central shaft component (37), and an outer rotary table (35) matched with the inner rotary table (38) through a toothless rotary bearing (36).