CN201217812Y - Articulated swivel device for agricultural hydraulic excavator - Google Patents

Abstract

The utility model discloses a hinging and rotating device of a hydraulic excavator, an upper connecting plate and a lower connecting plate of a revolving platform (1) are respectively connected with a steering frame (16) through an upper half shaft (4) and a lower half shaft (10), connection parts of the upper half shaft and the lower half shaft and the steering frame (16) are both provided with joint bearings (6); and the upper connecting plate on the revolving platform (1) and the steering frame corresponding to the upper connecting plate are provided with location pinholes for inserting and connecting locating pins (7). The hinging and rotating device adopts a discrete half shaft and rotating shaft structure which causes the assembling space and the maintancence space of key parts to be enlarged, thereby being favorable to the heat dissipation of operation elements, and being convenient for the assembly of main parts, at the same time, being convenient for daily maintenance. The discrete half shaft and rotating shaft connection improves the assembly accuracy among the revolving platform, the steering frame, the upper rotating shaft and the lower rotating shaft, and the joint bearings; pivotal bearings adopt angular contact ball bearings, which can further eliminate the additional tension caused by the assembly accuracy and improve the reliability of the whole device operation.

Description

The hinged slewing equipment of agricultural hydraulic crawler excavator

Technical field

The utility model belongs to the hinged rotary system technical field of agricultural hydraulic crawler excavator, and relating generally to is the hinged slewing equipment of a kind of hydraulic crawler excavator.

Background technology

The continuous enforcement of advocating the New Countryside Construction policy along with national agriculture-countryside-farmer's preferential policy and country energetically is with deep, economical agricultural engineering machinery has obtained using widely in farmland waterpower construction and various small-sized civil engineering construction, wherein agricultural economical hydraulic crawler excavator is especially because purchase cost is low, efficiency of construction height, the characteristics that maintainability is good, mobility is good become the main construction machinery of new countryside construction.Take a broad view of the design feature of domestic main agricultural economical hydraulic crawler excavator hinged steering mechanism, its hinged steering mechanism adopts structure as shown in Figure 2 mostly, mainly there is following defective in this kind structure design: the one, and gyroaxis 24 adopts whole shaft type design, promptly adopt a whole axis that rotary table 1 and bogie 16 are linked together, this structure is just to panoramic table 1, bogie 16 has proposed higher requirement with coaxial accuracy error between the connecting hole that gyroaxis 24 matches, and many medium-sized and small enterprises are because technical equipment is limited in one's ability, at processing panoramic table 1, during the connecting hole of bogie 16, because the restriction of processing cost and process equipment ability, the coaxial accuracy error in above-mentioned hole is difficult to reach perfect precision, thereby will on floating bearing 23, form bigger extra subsidiary stress after above-mentioned the assembling, be affixed by the load force in man-hour again, when excavator is carried out the revolution operation in work progress, just form bigger load stress in the part of floating bearing 23 easily, make floating bearing approximate " locking " situation occur, cause the premature wear of floating bearing 23 to reach destruction in advance easily, influence the application life of bearing, the reliability that reduction equipment uses; The 2nd, former hinged slewing equipment adopts 32312 cylindrical roller bearings as floating bearing 23, realize that digger operating device is with the revolution of bogie 16 along panoramic table 1, though this type bearing is pretty good in equally loaded environment turning down effect, but because hydraulic crawler excavator stressing conditions when excavating the revolution operation is comparatively complicated, adding this type bearing has relatively high expectations to assembly precision, if the extra subsidiary stress that occurs when assembling is bigger, then 23 life-spans of floating bearing will have a greatly reduced quality; The 3rd, former hinged steering mechanism assembly structure is comparatively complicated, and gyroaxis 24 belongs to sealed assembly structure with bogie 16, regular maintenance and lubricating maintenance to whole hinged steering mechanism and floating bearing 23 have brought bigger difficulty, in case floating bearing or consumable accessory break down, part exchanging gets up cumbersome.

Summary of the invention

The purpose of this utility model promptly produces thus, proposes the hinged slewing equipment of a kind of hydraulic crawler excavator.Eliminate because assembly precision causes extra subsidiary stress, improve the result of use and the application life of hinged slewing equipment.

The utility model realizes that the technical scheme that above-mentioned purpose is taked is: semiaxis on passing through respectively at the upper and lower junction plate position of panoramic table, semiaxis is connected with bogie down, at last semiaxis, descend the connecting portion of semiaxis and bogie to be provided with oscillating bearing; On top junction plate on the panoramic table and bogie, have and make alignment pin insert the dowel hole that connects.

The utility model has adopted Open architecture, make the assembly space and the maintenance space of key components and parts become big, and owing to adopted separate type semiaxis gyroaxis structure, both be beneficial to the heat radiation of groundwork elements such as gyroaxis and floating bearing, be convenient to the assembling of main parts size again.Owing to adopt two semiaxis formula gyroaxises, like this on panoramic table, the bogie and the machining accuracy error requirements of the connecting hole between the gyroaxis, revolute joint bearing just can reduce, thereby improved the assembly precision between panoramic table, bogie, gyroaxis, the revolute joint bearing relatively, reduced the extra subsidiary stress of above-mentioned parts when assembling, thus the result of use and the application life of having improved hinged slewing equipment.Because floating bearing has adopted GE70ES self-aligning oscillating bearing, have preferably " aligning " effect automatically, and require lower assembly precision.Because the price of this class bearing is relatively low, it is also comparatively convenient to install, change, and in daily use to maintenance, maintenance requirement is lower, therefore not only can further eliminate since the extra subsidiary stress that assembly precision forms to the bearing influence in application life, effectively improve the application life of bearing, but also can reduce the buying and the excavator regular maintenance cost of bearing.Because whole device is fixed on the hydraulic crawler excavator rear body by the pin connected mode, digger operating device and bogie are linked together, bogie is connected by articulated manner with panoramic table on the rear body, thereby realize that digger operating device is connected with the radial type of fuselage that to reach with the gyroaxis be the center, the revolution Job Operations of execution work device.Not only component structural is simple for this open hinged steering mechanism fully, make easily, can effectively reduce manufacturing cost, and bring great convenience for daily maintenance and component, effectively improved the result of use and the application life of hinged steering mechanism, be highly suitable on the agricultural economical hydraulic crawler excavator and use.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of the existing hinged slew gear of hydraulic crawler excavator.

10. times semiaxis of semiaxis 5. grease nipple 6. oscillating bearings, 7. alignment pin 8. locking nuts, 9. platens, 11. connecting bolts, 12. gyroaxis locking plates, 13. locking plate screws, 14. pads, 15. panoramic table connecting pins, 16. bogies, 17. panoramic table connecting pins, 18. locking nuts, 19. spring shims, 20. alignment pins, 21. linings, 22. sealing rings, 23. floating bearings, 24. gyroaxises, 25. linings, 26. glands, 27. panoramic table connecting pins on 1. panoramic tables, 2. linings, 3. platens 4. among the figure.

The specific embodiment

In conjunction with the accompanying drawings, it is as follows to provide embodiment of the present utility model:

As shown in Figure 1: present embodiment is made up of panoramic table 1, lining 2, platen 3, last semiaxis 4, grease cup 5, oscillating bearing 6, alignment pin 7, locking nut 8, platen 9, following semiaxis 10, connecting bolt 11, gyroaxis locking plate 12, locking plate screw 13, pad 14, panoramic table connecting pin 15, bogie 16, panoramic table connecting pin 17.Panoramic table 1 is by panoramic table connecting pin 15,17 link together with the excavator rear body, bogie 16 is by last semiaxis 4, following semiaxis 10 and two oscillating bearings 6 respectively with panoramic table 1 on, lower connecting plate connects as one, bogie 16 can be with semiaxis 4 about two revolutions like this, 10 centres of gyration that form are rotated along panoramic table 1, when excavator in when work, when the excacation device need turn round, the equipment that is installed on the bogie 16 can be that the centre of gyration is carried out the bi-directional rotary operation element with this articulation steering center just under the drive of hydraulic jack.During for fear of equipment out of use hydraulic jack is produced deboost, influence the application life of hydraulic jack.On top junction plate on the panoramic table 1 and bogie 16, have dowel hole, be in storage configuration or equipment and only carry out when working when excavation quits work with fuselage vertical direction single direction, in the dowel hole that alignment pin 7 can be inserted on panoramic table 1 and the bogie 16, thereby panoramic table 1 and bogie 16 mutual alignments is locked, can not make its revolution.

Be provided with oscillating bearing 6 at last semiaxis 4 and following semiaxis 10, this oscillating bearing 6 adopts GE70ES self-aligning oscillating bearing 6, be positioned at the connecting portion of bogie 16 respectively by two groups of platens 3,9 and connecting bolt 11, the installation site of two oscillating bearing outer rings on upper and lower semiaxis 4,10 and bogie 16 is fixed, so just can avoid device when work under the fluctuating load effect, the bearing outer ring position is moved, and causes the destruction of bearing.Being installed between superposed oscillating bearing 6 inner rings and bogie 16 junction plates of lining 2, in order to the fit-up gap between elimination oscillating bearing 6 inner rings and bogie 16 junction plates, thus the fixed-site of oscillating bearing 6 inner rings on last semiaxis 4 is dead.When working, produce rotation for limiting upper and lower semiaxis, be welded with locking plate 12 respectively on the semiaxis 4,10 up and down, and upper and lower semiaxis 4,10 is fixed on the last lower connecting plate of panoramic table 1 by locking plate screw 13, thereby restriction up and down semiaxis produces rotation when work, make bogie 16 can be smoothly by about oscillating bearing 6 on the semiaxis 4,10 on panoramic table, do gyration.Two locking nuts 8 and pad 14 be by being connected with external screw thread on the last semiaxis 4, and last semiaxis 4 is fixed on the junction plate on the panoramic table 1, and semiaxis is comparatively firm to be fixed together with panoramic table 1 thereby will go up.The reliability end face respectively is equipped with a grease nipple 5 on semiaxis up and down, excavator is when work, oilhole about can regularly reaching by grease cup on the semiaxis is oscillating bearing 6 filling butter easily, admit greasy property to improve joint shaft, reduce operating temperature, reduce bearing wear, improve the application life of oscillating bearing.

The utility model is when work, when digger operating device need be carried out the revolution operation, hydraulic system drives cylinder pushes bogie 16, bogie promptly drives the above semiaxis 4,11 down of equipment and is the center, has realized being articulated and connected and carrying out the revolution operation of excavator and fuselage thereby turn round along panoramic table 1.

Claims (5)

1. A hinged rotary device for a hydraulic excavator, comprising a rotary table (1) and a bogie (16), characterized in that: the upper and lower connecting plates of the rotary table (1) pass through the upper half shaft (4 ), the lower half shaft (10) is connected with the bogie (16), and joint bearings (6) are arranged at the connecting parts of the upper half shaft (4), the lower half shaft (10) and the bogie (16); The upper connecting plate on the above-mentioned turntable (1) and the bogie (16) corresponding thereto have a positioning pin hole for inserting and connecting the positioning pin (7). 2. The hydraulic excavator articulated turning device according to claim 1, characterized in that: the joint bearing (6) is a GE70ES self-aligning joint bearing. 3. The hydraulic excavator articulated turning device according to claim 1, characterized in that: the joint bearing (6) is respectively positioned on the bogie by two sets of pressure plates (3) (9) and connecting bolts (11). (16) connection part. 4. The hydraulic excavator articulated turning device according to claim 1, characterized in that: lock pieces (12) are respectively welded on the upper half-shaft (4) and the lower half-shaft (10), and are connected through the lock The upper half shaft (4) and the lower half shaft (10) are fixed on the upper and lower connecting plates of the turntable (1) by a piece screw (13). 5. The hydraulic excavator articulated turning device according to claim 1, characterized in that grease nipples (5) are provided on the end faces of the upper half shaft (4) and the lower half shaft (10).

Images