WO2013097080A1

WO2013097080A1 - Mining shovel loader and revolving-and-rolling support device therefor

Info

Publication number: WO2013097080A1
Application number: PCT/CN2011/084687
Authority: WO
Inventors: 张永明; 王晓明; 毛瑞; 李洪
Original assignee: 太原重工股份有限公司
Priority date: 2011-12-26
Filing date: 2011-12-26
Publication date: 2013-07-04
Also published as: RU2608484C2; RU2014127704A; ZA201405384B

Abstract

A mining shovel loader and a revolving-and-rolling support device therefor are provided. The revolving-and-rolling support device is used for the connection between an upper mechanism and a lower mechanism of the mining shovel loader. The revolving-and-rolling support device comprises a roller device (19); a gear ring (22); and an upper roller bed (18), a lower roller bed (20) and a lateral roller bed (21), provided for the rolling movement of the rollers of the roller device. The upper roller bed (18) is fixedly connected to the bottom of a primary revolving platform (11) of the upper mechanism. The lower roller bed (20) and the lateral roller bed (21) are provided on the gear ring (22) below the roller device (19), and the gear ring (22) has: a top plate part (221), with the lower roller bed (20) and the lateral roller bed (21) being provided on the top face (50) of the top plate part (221); a gear ring part (222) provided on the side face of the gear ring and at the outside with respect to the top plate part (221); and a bottom part (220) fixedly connected to an under-frame beam device (15) of the lower mechanism. The revolving-and-rolling support device has the advantage of prolonging the service life thereof while being convenient when a worn component needs replacing.

Description

Mining excavator and its rotary rolling support device

The present invention relates to the field of excavators, and more particularly to a revolving rolling support device for a mining excavator and a mining excavator having the revolving rolling support device. Background technique

Mine excavator is an important heavy mining machine. For mining excavators, as shown in Figure 1, the mining excavator mainly includes the upper rotating mechanism (referred to as the upper mechanism) and the lower supporting chassis. A running mechanism (referred to as a lower mechanism) and a rotary rolling support device connecting the upper mechanism and the lower mechanism.

As shown in Fig. 1, the mining excavator includes a bucket for excavating materials, an arm that can be moved forward and backward, a support boom 3, a lifting wire rope 4 of the lifting bucket 1, and a rope supporting the boom 3. 5. Operating the driver's cab 6, the bracket 7 for fixing the rope 5, the dust exhausting device 8, the machine room 9 for placing the lifting mechanism and the electrical cabinet, etc., the weight box 10 for placing the weight, and all supporting the upper mechanism The turning main platform 11 of the rotating member, the turning mechanism 12 for supplying the turning power, and the like constitute the upper mechanism, and the upper mechanism is all fixed on the turning main platform 11.

As shown in FIG. 1, the lower mechanism is provided by a crawler traveling device 16 that provides traveling power to the mining excavator and contacts the ground to support the mining excavator, and a underframe beam device 15 that connects the crawler frame and the revolving rolling support device. A centrally located central shaft 14 or the like is provided for the upper mechanism and the lower mechanism.

The slewing rolling bearing device 13 is disposed between the rotating main platform 11 and the underframe beam device 15 to provide support for the rotation of the upper mechanism.

As shown in FIG. 2, the revolving rolling support device 13 includes a roller device 90, a large ring gear 96, and an upper roller path 91 that defines the roller rolling of the roller device 90, a lower roller table 94, and a side roller table 95; the upper roller table 91 is fixed. Connected to the bottom of the rotary main platform 11 of the upper mechanism, the upper roller table 91 is generally composed of two front and rear half rings; the roller device 19 is fixed to the inner cage 93 by bolts; the lower roller table 94 is directly fixedly connected to the chassis The beam means 15, the inside of the large ring gear 96; the lower roller table 94 is usually formed as an integral roller table. The large ring gear 96 meshes with the pinion 24 of the slewing mechanism 12, and drives the entire upper mechanism to rotate centering on the center shaft 14. The large ring gear and pinion are commonly referred to in the art, where the "large" of the large ring gear 96 is large relative to the size of the pinion 24, while the "small" of the pinion 24 is also relative to the size of the large ring gear 96. Small. The large ring gear 96 has an L-shaped cross section, and the bottom surface of the large ring gear 96 is connected to the underframe beam device by a positioning steel sleeve 97 and a bolt 98.

For the performance improvement of mining excavators, the rotary rolling support device plays a very important role, the rotary rolling branch The struts separate the upper mechanism from the lower mechanism so that the upper mechanism of the mining shovel can rotate 360 degrees freely. Because the working site of the mining excavator is an open-pit mining area with large dust and large equipment vibration, and the mining excavator itself has a large volume, a large bearing capacity, and a large transmission gap, coupled with the current limitations of materials and heat treatment technology, resulting in revolving rolling. The components inside the support roller of the support device fail quickly and need to be replaced frequently.

Specifically, the prior art rotary rolling support device mainly has the following drawbacks:

a) As shown in FIG. 3, the remaining upper mechanism except the rotary main platform 11 is omitted in FIG. 3. When the wear parts of the rotary rolling support device 13 need to be repaired and replaced, the entire upper mechanism is required to be completely detached from the middle. Central axis 14. Therefore, it is inconvenient for maintenance and replacement;

b) When the lower roller table 94 needs to be replaced, the large ring gear 96 must be completely removed, and the lower roller table 94 must be replaced as a whole;

c) The replacement of the upper roller table 91 also requires an integral replacement, and the connecting piece of the upper roller table 91 does not have a positioning member for positioning. When the new upper roller table 91 is installed, it needs to be re-aligned;

d) that the prior art side roller table 95 is substantially formed by the inner face of the large ring gear 96, so that there is no separate side roller table;

e) The upper roller table 91 is fixed by a welding baffle type, for example, the baffle 92 is used for fixing the upper roller table 91, and the welded connection manner is disadvantageous for the wear part replacement operation on the spot; and the lower roller table 94 is a large ring gear. The inner side of the 96 lower part is pressed, so the replacement is inconvenient.

0 The lateral roller path 95 is directly formed on the inner side of the large ring gear 96, and the large roller ring 96 needs to be replaced after the lateral roller path 95 is relatively worn;

g) Large ring gear 96 is connected by ordinary positioning steel sleeve 97 and bolt 98, which is not conducive to transmitting large torque and affects the running reliability of the large ring gear 96.

In summary, it is obvious that the prior art mining excavator rotary rolling support device is very inconvenient for the maintenance of the equipment, especially when replacing the worn parts, which is time consuming and laborious, and the running cost is high. Summary of the invention

In view of the problems existing in the prior art, an object of the present invention is to provide a heavy-duty and easily replaceable rotary rolling support device for a mining excavator, which overcomes the inconvenience of maintenance of the prior art rotary rolling support device, and replaces wear and tear. It is a time-consuming and laborious technical problem with high operating costs.

Another object of the present invention is to provide a mining excavator having the revolving rolling support device of the present invention. The present invention is achieved by the following technical solutions: A rotary rolling support device for connection between an upper mechanism and a lower mechanism of a mining excavator, the rotary rolling support device comprising a roller device, a ring gear and an upper roller table for rolling the roller defining the roller device, a lower roller table and a lateral roller table; the upper roller table is fixedly coupled to a bottom portion of the rotary main platform of the upper mechanism; the lower roller table and the lateral roller path are disposed at the lower portion of the roller device The ring gear has: a top plate portion, the lower roller path and the lateral roller path are disposed on a top surface of the top plate portion; a ring gear portion is disposed on a side surface of the ring gear, and the top plate portion is The outer side; the bottom plate portion is fixed to the underframe beam device of the lower mechanism.

The mining excavator of the present invention has the revolving rolling support device of the present invention.

The beneficial effects of the present invention are that the rotary rolling support device of the present invention and the mining excavator of the present invention have the following advantages as compared with the prior art:

1. The ring gear consisting of the top plate part, the ring gear part and the bottom plate part replaces the large ring gear in the prior art, realizing reliable high torque transmission and ensuring the safety of the ring gear.

2. The side roller table is installed separately, which provides effective protection for the ring gear and facilitates the replacement of the side roller table.

3. All roller conveyors, including the upper roller conveyor, the lower roller conveyor and the lateral roller conveyor, are either adopted or can be segmented roller structure, fixed by bolt connection, and easy to operate when replacing.

4. All the rollers are positioned in the way of the stop. There is no need to find the reference when replacing, no need to re-align.

5. The position of the lower roller table is improved. It is convenient to replace the worn parts such as rollers and roller rollers on site. It is not necessary to lift the entire upper mechanism to the central axis completely away from the center, saving time and effort, high efficiency and greatly shortening the maintenance cycle. .

6. The service life of the entire rotary rolling support device is improved, and the production efficiency of the mining excavator is greatly improved. DRAWINGS

Figure 1 is a schematic view of the structure of a mining excavator;

2 is a schematic structural view of a prior art rotary rolling support device, that is, an enlarged view of a portion A in FIG. 1; and FIG. 3 is a schematic view showing a replacement rolling system of the prior art rotary rolling support device.

4 is a schematic structural view of a swing rolling support device according to an embodiment of the present invention;

Figure 5 is a schematic view showing the installation of the upper roller table, that is, a sectional view taken along line B-B in Figure 4;

Figure 6 is a schematic view of the lower roller table installation, that is, a D-D cross-sectional view in Figure 4;

Figure 7 is a schematic view of a roller device in an embodiment of the present invention;

Figure 8 is a schematic view showing the fixing of the ring gear according to the embodiment of the present invention, that is, the F-F sectional view in Figure 4;

Figure 9 is a cross-sectional view taken along line C-C of Figure 5;

Figure 10 is a cross-sectional view taken along line EE of Figure 6; Figure 11 is a cross-sectional view taken along line GG of Figure 5;

Figure 12 is a cross-sectional view taken along line H-H of Figure 7;

Figure 13 is an enlarged view of a portion I in Figure 12;

Figure 14 is a cross-sectional view taken along the line E-E of another symbol in Figure 6.

Figure 15 is a schematic view of a combination bolt in an embodiment of the present invention. detailed description

Exemplary embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of various modifications in the various embodiments of the invention this invention.

A mining excavator according to an embodiment of the present invention has a rotary rolling support device for a mining excavator according to an embodiment of the present invention. The inside and outside of this specification are distinguished by the distance between the central axes 14, and the side closer to the central axis 14 is referred to as the inner side and vice versa.

The rotary rolling support device of the embodiment of the present invention is a heavy-duty and easily replaceable rotary rolling support device, comprising a bolted segmented upper roller table 18, a roller device 19 fixed by the roller frame, and fixed by the bottom plate portion 220. A ring gear 22 connected to the underframe beam device 15, a segmented lower roller table 20 and a lateral roller path 21 which are bolted to the top surface 50 of the top plate portion 221 of the ring gear 22.

The structure and assembly of the upper roller table 18, the roller device 19, the lower roller table 20, the lateral roller table 21, and the ring gear 22 will be specifically described below.

First, the upper roller table 18

As shown in FIG. 4 and FIG. 9, the lower cover plate 110 of the rotary main platform 11 of the upper mechanism is welded with a mounting steel plate 17 for mounting the upper roller table 18, and the section of the mounting steel plate 17 is L-shaped, and the steel plate 17 is mounted. The lower surface is a positioning surface 27, and the lower side is a positioning stop surface 28, and the positioning surface 27 is respectively provided with bolt holes 29, 30 for mounting and positioning the upper roller table 18. The mounting steel plate 17 can be welded to the lower surface of the lower cover 110.

As shown in Fig. 9, the upper roller table 18 has a "ring track" shape. As shown in Fig. 5, the upper roller table 18 is preferably segmented, that is, a plurality of segmented roller tables are combined, preferably, upper portion. The roller table 18 can be composed of eight segmented roller tables.

The upper roller table has a tapered surface 32 and mounting holes 33, 34, and positioning surfaces 35 and 36, wherein the positioning surface 35 cooperates with the positioning stop surface 28, and the positioning surface 36 cooperates with the positioning surface 27, the mounting hole 33 and the mounting hole 29 The mating, mounting holes 34 cooperate with the mounting holes 30 and are fixed by fasteners 25, 26 to form the positioning of the upper roller table 18. The fasteners 25, 26 are, for example, lock bolts. As shown in Figures 5 and 11, the upper roller tables 18 of each segment are preferably joined by a contact surface 37, and the contact surface 37 is a bevel, i.e., the axis of the central axis 14 is in line with the bevel. The plane is parallel, rather than passing through the plane of the slope, which allows the two adjacent segmented rollers to support each other and share the force. The eight segmented roller lanes are divided into two groups, and each of the four segmented roller lanes constitutes a half ring, and between the two half rings, as shown in FIG. 11, a gap is left in the lower portion of the rotary main platform 11 for The reinforcing fixing plate 31 is attached to further fix the upper roller table 18. The reinforcing fixing plate 31 and the segmented roller table are only dead and have no connection. As shown in Fig. 11, the reinforcing fixing plate 31 is welded to the positioning surface 27 of the mounting steel plate 17 to fix the axial movement of the reinforcing fixing plate 31.

Compared with the prior art upper roller table 18 fixing method, the positioning stop surface 28 is added, and the upper roller table 18 is changed to a segmented type to ensure convenient processing, installation and replacement. The fixing method of the upper roller table 18 is changed from the plate welding method to the bolt fixing method, and the reinforcing fixing plate 31 for the circumferential limit is added. At the same time, the upper roller table 18 of the present invention can be wider and thinner than the prior art upper roller table 91. The purpose of widening the upper roller table 18 is to lengthen the contact surface of the upper roller table 18 and the roller 44 to improve the service life. The thinning of the upper roller table 18 improves the quality of the heat treatment, thereby increasing its strength and service life, while reducing the weight and facilitating replacement. Therefore, it is convenient to position the upper roller table 18, and when the upper roller table 18 needs to be replaced, it can be positioned and installed once in the original position without re-alignment. The surface of the upper roller table 18 in contact with the roller 44 is a tapered surface 32, and the intersection of the bus bars, that is, the apex of the tapered surface, is on the straight line of the axis of the central axis 14, ensuring that the relative movement between the roller 44 and the roller table 18 is only rolling without relative Sliding increases the service life of the rollers 44 and the roller tables 18.

Second, the roller device 19

The roller unit 19 includes a roller 44 and a roller holder, and the roller 44 is fixed to the roller frame. The roller frame includes an inner holder 38 and an outer holder 39. The roller 44 is evenly arranged on the circumference of the holder 38 and the outer holder 39. Or evenly arranged on the circumference of the upper roller table 18 and the lower roller table 19.

As shown in Fig. 13, all the rollers 44 are connected together by a roller pin 41, a bolt 42 as a fastener, a pin sleeve 45 and a roller frame, and the roller device 19 rotates around its center line. The rotary main platform 11 rotates and supports the weight of the entire upper mechanism. The roller pin 41 rotates in the direction in which the roller 44 revolves in addition to the fixed roller 44, but does not itself bear the weight of the upper mechanism of the mining excavator. The roller pin 41 and the roller frame and the roller 44 are connected by a bolt 42 having a passage for filling the inside of the roller 44 in the middle of the bolt 42.

The roller unit 19 is shown in Figs. 7, 12 and 13, and the inner holder 38 and the outer holder 39 of the roller unit 19 are also divided into a plurality of sections which are connected by fasteners such as bolts. . The inner retainer 38 and the outer retainer 39 are connected to the roller pin 41 by a fastener 42. The fastener 42 has an oil filling hole 47 therein. The oiling hole 47 communicates with the intersecting intersecting hole 48 to form an oil filling passage. The nozzle 43 at the end of the member 42 is injected between the roller pin 41 and the sleeve 45. The oil, the pin sleeve 45 is interposed in the inner portion of each of the rollers 44, and the outer periphery of the roller pin 41 to protect the roller 44 and to rotate relative to the roller pin 41.

As shown in Fig. 13, the surface of the roller 44 which is in contact with the upper roller table 18 and the lower roller table 20 is a tapered surface 46 which is elongated and intersects on a straight line of the axis of the central shaft 14, as shown in Fig. 12. Compared with the prior art, the grease fitting 43 is added to the roller device 19, and the outer retainer 39 is added, which can ensure that the roller 44 rotates and positions the roller, and the roller can be conveniently replaced, and the inside of the roller 44 can be ensured. lubricating. At the same time, the lower roller table 20 of the present invention can be wider and thinner than the lower roller table 94 of the prior art, and the purpose of widening the lower roller table 20 is to lengthen the contact surface with the roller 44 to improve the service life. The thinning of the upper roller table 18 can improve the quality of the heat treatment, thereby improving its strength and service life, while reducing the weight and facilitating replacement.

Third, the lower roller table 20, the lateral roller table 21 and the ring gear 22

As shown in Fig. 10, the ring gear 22 is divided into three parts, that is, a top plate portion 221, a ring gear portion 222, and a bottom plate portion 220. The ring gear portion 222 meshes with the pinion gear 24 of the slewing mechanism 12, and drives the entire upper mechanism to rotate centering on the center shaft 14.

As shown in Figs. 6, 10 and 14, the lower roller table 20 is mounted on the top plate portion of the ring gear 22, and the lower roller table 20 is divided into a plurality of segments, preferably also divided into eight segments. Similarly, the lower roller table 20 of each segment is preferably joined by a contact surface 49, and the contact surface 49 is also a beveled surface, which acts the same as the upper roller table 18 and will not be described again.

The lower roller table 20 has a tapered surface 57 that cooperates with the roller 44, and a stop positioning surface formed with the upper side surface of the top plate portion 221

A 52-positioned positioning surface 53, a lower surface 54 that cooperates with the top surface 50 of the top plate portion 221, a side surface 55 that cooperates with the mouth positioning surface 51 formed by the other upper side of the top plate portion 221, and a side roller path 21 The inner side surface 59 cooperates with the positioning surface 58 and the positioning surface 73 which cooperates with the lower surface 74 of the side roller table 21. The lower roller table 20 is provided with fixing holes 69, 71 which are fixed to the top plate portion 221 by fasteners 61, 62, wherein The fasteners 61, 62 are preferably loose bolts which in turn pass through the lateral roller table 21, the lower roller table 20 and the top plate portion 221.

Compared with the prior art, the lower roller table 20 is disposed at the upper portion of the ring gear 22 to expose the roller 44, and the lower roller table

The fixing of the 20 is all by the positioning of the mouth and the bolting, and the lower roller table 20 and the roller 44 can be quickly replaced.

The lateral roller path 21 provides a lateral bucking force for the roller 44 to ensure normal rotation of the roller 44. The lateral roller table 21 is also divided into segments. As shown in Fig. 6, the lateral roller table 21 has an axis with the roller 44. Face mating ramp 60, and lower roller table

20 side surface 58 mating positioning surface 59, positioning surface 74 matching the upper plane 73 of the lower roller table 20, and the positioning surface of the mouth

The mating positioning surface 56, the upper portion of the side roller table 21 is provided with a fixing hole 72 which is fixed to the top plate portion 221 by the fastener 62 together with the lower roller table 20.

The lateral roller path 21 provides assurance that the roller 44 rolls along the upper roller table 18 and the lower roller table 20. And in the prior art There is no independent lateral roller table 21, and only the large ring gear 96 can be replaced after wear. Therefore, the rotary rolling support device of the present invention provides another structure for the lateral movement of the fixed roller 44, which is advantageous for maintenance of the device and saves cost. The above-mentioned positioning faces and the stoppers for mounting the lower roller table 20 and the side roller table 21, and the corresponding mounting holes are all convenient and quick for ensuring the installation and replacement of the lower roller table 20 and the lateral roller table 21.

As shown in Figs. 8, 10 and 14, the upper cover of the underframe beam device 15 has a processing surface 75, a stop positioning surface 66, and a positioning hole 64. The lower portion of the bottom plate portion 220 has a positioning surface 76 with the processing surface 75 on the upper cover of the lower chassis beam 15, and a positioning surface 67 that cooperates with the opening positioning surface 66, and has a positioning hole 65, which is combined with the positioning hole 64. The bolts 63 are connected. The combination bolt herein may also be referred to as a "super bolt". As shown in FIG. 15, the combination bolt 63 includes a top nut 81, a welded fixing washer 82, a bolt 83, and a top bolt 81 and an upper surface of the bottom plate portion 220. The bottom nut 84, the bottom nut 84 includes a main nut 842, a plurality of pre-tightening screws 843 evenly distributed around the outer circumference of the main nut 842, and a hardened washer 841 disposed between the lower surface of the underframe beam device 15 and the pre-tightening screw 843. . The top nut 81 is, for example, a hex nut. Bolts 83 should be made of "exquisite" bolts with high thread connection accuracy and good connection reliability. The exquisite bolts are bolts with bolt holes and bolt outer diameters. The bolts with tolerances conform to the Chinese national standard H7/G6, such as the imported M72 type. Correspondingly, it is necessary to equip the "super nut" which is suitable for the delicate bolt. The super nut is generally composed of a large nut in the middle and a small screw of the outer ring of the large nut. The bottom nut 84 of the present invention is a kind of "super nut". " The large nut is also the main nut 842, and the small screw is the pre-tightening screw 843. When tightening, it is not necessary to completely tighten the intermediate main nut 842. By pre-tightening the pre-tightening screw 843 according to the specified torque, Pre-tighten the entire bottom nut 84. Through the use of the above-mentioned "precision bolt" and "super nut", the function of transmitting high torque and anti-loose can be achieved, the pre-tightening force of the bolt device is uniform, the error is small, the pre-tightening tool is simple, the operation is simple and labor-saving. The "tight bolt" of the present invention has a large specification but a small amount, and the number of pre-tightening is small, and the pre-tightening can be performed with a small torque wrench, which saves the expenditure for purchasing a special pre-tightening tool.

The upper portion of the top plate portion 221 has a top surface 50 that is positioned to cooperate with the lower surface 54 of the lower roller table 20, a surface 52 that is positioned with the inner side stop surface 53 of the lower roller table 20, and an outer peripheral surface 55 of the lower roller table 20 and a lateral roller. The outer side surface 56 cooperates with the positioned positioning surface 51, and the top surface 50 is the upper surface of the top plate portion 221 to ensure that the roller 44 is exposed for easy replacement. The upper portion of the top plate portion 221 is provided with threaded holes 68 and 70, and the upper roller table 20 and the side roller table 21 are fixed by fasteners 61 and 62.

Compared with the prior art, the ring gear of the present invention has more the top plate portion 221 and the bottom plate portion 220 than the original large ring gear 96, so that the connection of the ring gear 22 and the underframe beam device 15 is more reliable, and the underframe beam device 15 The connection positioning mode is also changed from the positioning sleeve and the bolt to the combination bolt 63, which improves the shear resistance of the ring gear 22 in the circumferential direction. At the same time, the positions of the lower roller table 20 and the roller 44 are increased, and the thicknesses of the upper roller table 18 and the lower roller table 20 are reduced, and the width is increased, thereby lengthening the contact between the upper roller table 18 and the lower roller table 20 and the roller 44. The surface improves the service life. Need to replace this hair When the wear member in the rolling support device is turned off, it is no longer necessary to completely separate the central shaft 14 from the lower mechanism and partially separate. The roller table and the roller 44 are conveniently replaced, the ring gear portion 222 is protected, and the repositioning of the center shaft 14 is eliminated. Therefore, the present invention provides a convenient and quick replacement of the wear member, which greatly shortens the maintenance time.

The technical solution of the present invention has been disclosed above by the preferred embodiments. Those skilled in the art will appreciate that the modifications and refinements made without departing from the scope and spirit of the invention as disclosed in the appended claims are within the scope of the appended claims.

Claims

Claim

A rotary rolling support device for connection between an upper mechanism and a lower mechanism of a mining excavator, characterized in that the rotary rolling support device comprises a roller device, a ring gear and a roller defining the roller device Rolling upper roller table, lower roller table and side roller table;

The upper roller table is fixedly coupled to the bottom of the rotating main platform of the upper mechanism;

The lower roller table and the lateral roller table are disposed on the ring gear, and the ring gear is disposed under the roller device, the ring gear has:

a top plate portion, the lower roller table and the lateral roller table are disposed on a top surface of the top plate portion;

a ring gear portion disposed on a side of the ring gear, opposite outer sides of the top plate portion;

The bottom plate portion is fixedly coupled to the underframe beam device of the lower mechanism.

The swing rolling support device according to claim 1, wherein the lateral roller path is detachably coupled to the top surface of the top plate portion.

The reciprocating rolling support apparatus according to claim 2, wherein the upper roller table, the lower roller table, and the lateral roller path are each composed of a plurality of segmented roller tables.

The reciprocating rolling support device according to claim 3, wherein the contact faces between the adjacent segmented roller paths are inclined faces.

The swing rolling support device according to claim 2, wherein a bottom plate of the lower main cover of the rotary main platform is provided with a connecting steel plate having a positioning stop to connect the upper roller table, and a top portion of the top plate portion The face also has a positioning stop for positioning the lower roller table.

The swing rolling support apparatus according to claim 2, wherein the roller frame of the roller device comprises an inner holder and an outer holder.

The swing rolling support device according to claim 6, wherein a roller pin of the roller device is coupled to the inner holder and the outer holder by a fastener, and the fastener is internally formed An oil-filling hole is formed in the roller pin, and a cross-section intersecting hole communicating with the oil-filling hole is formed therein, and an outer peripheral surface of the roller pin is sleeved with a pin sleeve, and an outer end of the fastener is provided with a grease nozzle. The oil is injected between the roller pin and the pin sleeve through the oil nozzle and through the oil injection hole and the intersecting intersecting hole.

The swing rolling support device according to claim 3, wherein the upper roller table and the lower cover of the rotary main platform are connected by bolts, and the lower roller table and the ring gear are The top surface is connected by bolts, and the side roller table is connected with the top surface by bolts, and the bottom plate portion is fixedly coupled to the underframe beam device by a combination bolt, the combination bolt The top nut and the bottom plate are disposed on the top nut and the bottom plate portion a welding fixing washer, a bolt and a bottom nut of the upper surface of the sub-ring, the bottom nut includes a main nut, a plurality of pre-tightening screws evenly distributed around the outer circumference of the main nut, and a bottom surface of the underframe beam device A hardened washer between the pretensioning screws.

The rotary rolling support apparatus according to claim 8, wherein the upper roller table and the lower roller are each composed of eight segmented roller tables.

10. A mining excavator, characterized in that the mining excavator has the revolving rolling support device according to any one of claims 1-9.