Rolling body structure of large rotary supporting mechanism

Abstract

The utility model discloses a rolling body structure of a large-scale rotary support mechanism, which comprises a pin roller body, a pin shaft, a connecting bolt, a nut, an inner side retainer and an outer side retainer, the pin roller body is sleeved on the outer side surface of the pin shaft, and bulges on the outer side surface of the pin roller body are clamped in corresponding grooves of an upper circular track and a lower circular track to roll. The inner side retainer and the outer side retainer make contact with the two end faces of the pin shaft respectively, the connecting bolt sequentially penetrates through the inner side retainer, the pin shaft and the outer side retainer, the outer side face of the connecting bolt is in threaded connection with a nut, the outer side retainer is of a U-shaped structure, the outer side face of the pin shaft is provided with a copper sheet, and the copper sheet is in threaded connection with the connecting bolt. According to the rolling body structure of the large rotary supporting mechanism, the stability and the smoothness of an excavator during rotary operation can be guaranteed, faults are reduced, and the use safety is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavator technical field, concretely is a kind of rolling body structure of large slewing support mechanism. BACKGROUND

[0002] Large excavator needs to rotate when working, and the mechanism for supporting the rotation of the excavator is a slewing support mechanism, which mainly realizes the slewing operation of the excavator by rolling the rolling body in the upper and lower ring tracks.

[0003] The rolling body is limited by the inner and outer retaining frames when rolling, so it cannot move around. The existing rolling body will be subjected to outward centrifugal force when rolling, which causes friction between the rolling body and the outer retaining frame, affecting the smoothness and stability of the rolling body. Moreover, the outer retaining frame is a circular or square piece, which is prone to breakage under excessive stress, thereby affecting the operation of the excavator. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a rolling body structure of large slewing support mechanism, which can ensure the stability and smoothness of the excavator during slewing operation, reduce the occurrence of faults, and effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a rolling body structure of large slewing support mechanism, comprising a roller body, a pin shaft, a connecting bolt, a nut, an inner retaining frame and an outer retaining frame, the roller body is sleeved on the outer side of the pin shaft, the protrusions on the outer side of the roller body are clamped in the corresponding grooves of the upper and lower ring tracks for rolling, the inner and outer retaining frames are in contact with the two end faces of the pin shaft respectively, the connecting bolt passes through the inner retaining frame, the pin shaft and the outer retaining frame in sequence, and the outer side of the connecting bolt is threadedly connected with the nut, the outer retaining frame is in U-shaped structure, the outer side of the pin shaft is provided with a copper sheet, and the copper sheet is located between the roller body and the outer retaining frame.

[0006] As a preferred technical scheme of the utility model, a U-shaped gasket is arranged between the head of the connecting bolt and the inner retaining frame, and the number of connecting bolts passing through the U-shaped gasket is two, and the two connecting bolts are arranged in parallel.

[0007] As a preferred technical scheme of the utility model, an oil outlet groove is arranged on the contact surface between the pin shaft and the roller body, a grease channel is arranged in the pin shaft, one end of the grease channel is communicated with the oil outlet groove, and the other end of the grease channel penetrates the outer retaining frame.

[0008] As a preferred technical scheme of the utility model, a plunger for plugging the grease channel is installed on the outer retaining frame.

[0009] Compared with the prior art, the large rotary support mechanism has the advantages that the rolling body structure is reasonable in design and ingenious in concept, the strength of the outer side retainer is increased by arranging the U-shaped outer side retainer, the outer side retainer is prevented from being broken due to excessive stress, the copper sheet is arranged between the rolling body and the outer side retainer to reduce the friction between the rolling body and the outer side retainer, the outer side retainer is prevented from being deformed during the rotation of the excavator, and the stability and smoothness of the rotation process are further affected. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structural schematic view of the utility model;

[0011] Figure 2 It is Figure 1 the sectional view of A-A;

[0012] Figure 3 It is Figure 2 the left view.

[0013] In the figure: 1 rolling body, 2 pin shaft, 3 connecting bolt, 4 nut, 5 inner side retainer, 6 U-shaped gasket, 7 outer side retainer, 8 copper sheet, 9 grease channel, 10 plunger, 11 oil outlet groove. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0015] Please refer to Figures 1-3 The utility model provides a technical scheme: a rolling body structure of a large rotary support mechanism, which comprises a rolling body 1, a pin shaft 2, a connecting bolt 3, a nut 4, an inner side retainer 5 and an outer side retainer 7, the rolling body 1 is sleeved on the outer side surface of the pin shaft 2, the protrusions on the outer side surface of the rolling body 1 are clamped in the corresponding grooves in the upper and lower ring tracks to roll, the inner side retainer 5 and the outer side retainer 7 are in contact with the two end surfaces of the pin shaft 2 respectively, the connecting bolt 3 passes through the inner side retainer 5, the pin shaft 2 and the outer side retainer 7 in sequence, and the outer side surface of the connecting bolt 3 is threadedly connected with the nut 4;

[0016] The outer side retainer 7 is in U-shaped structure, the strength of the outer side retainer 7 is increased, and the outer side retainer 7 is prevented from being broken due to excessive stress;

[0017] The outer side of the pin shaft 2 is provided with a copper sheet 8 between the roller body 1 and the outer side retainer 7, the copper sheet 8 reduces the friction between the roller body 1 and the outer side retainer 7, and prevents the outer side retainer 7 from being deformed.

[0018] Further, a U-shaped gasket 6 is arranged between the head of the connecting bolt 3 and the inner side retainer 5, and the connecting bolt 3 passes through the U-shaped gasket 6, the number of the connecting bolt 3 is two, and the two connecting bolts 3 are arranged in parallel, the two connecting bolts 3 are connected through the same U-shaped gasket 6, when the nut 4 is tightened, the pin shaft 2 is prevented from rotating.

[0019] In order to facilitate the addition of butter between the roller body 1 and the pin shaft 2, and improve the lubrication effect between the two, an oil outlet groove 11 is arranged on the contact surface of the pin shaft 2 and the roller body 1, a butter channel 9 is arranged in the pin shaft 2, one end of the butter channel 9 is communicated with the oil outlet groove 11, and the other end of the butter channel 9 penetrates the outer side retainer 7.

[0020] In order to facilitate the prevention of butter flowing out, the outer side retainer 7 is provided with a plunger 10 for plugging the butter channel 9.

[0021] In use: the roller body 1 is installed on the outer side of the pin shaft 2, then the U-shaped gasket 6 and the inner side retainer 5 are tightly attached to one end of the pin shaft 2, the copper sheet 8 is sleeved on the other end of the pin shaft 2, the outer side retainer 7 is placed at the end face position, the two connecting bolts 3 pass through the U-shaped gasket 6, the inner side retainer 5, the pin shaft 2 and the outer side retainer 7 in sequence, and then the nut 4 is tightened.

[0022] The excavator can effectively avoid the problem of poor operation during the rotary operation, the strength of the outer side retainer 7 is increased by arranging the U-shaped outer side retainer 7, so that the outer side retainer 7 is not easy to be broken under stress, and the occurrence of faults is reduced; the copper sheet 8 is arranged to reduce the friction between the roller body 1 and the end face of the outer side retainer 7, and the smoothness of the rotary process is increased.

[0023] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rolling body structure of a large slewing bearing mechanism, comprising a roller body (1), a pin shaft (2), a connecting bolt (3), a nut (4), an inner cage (5) and an outer cage (7), the roller body (1) being sleeved on the outer side of the pin shaft (2), the protrusions on the outer side of the roller body (1) being clamped in the corresponding grooves of the upper and lower ring tracks for rolling, the inner cage (5) and the outer cage (7) being in contact with the two end faces of the pin shaft (2) respectively, the connecting bolt (3) passing through the inner cage (5), the pin shaft (2) and the outer cage (7) in sequence, and the outer side of the connecting bolt (3) being threadedly connected with the nut (4), characterized in that: the connecting bolt (3) is provided with a plurality of protrusions on the outer side, the protrusions of the connecting bolt (3) being clamped in the corresponding grooves of the inner cage (5) and the outer cage (7) for rolling, and the protrusions of the connecting bolt (3) are in contact with the inner cage (5) and the outer cage (7) respectively. The outer holder (7) is in U-shaped structure, the outer side of the pin shaft (2) is provided with a copper sheet (8), and the copper sheet (8) is located between the roller body (1) and the outer holder (7).

2. The rolling body structure of a large slewing bearing according to claim 1, characterized in that: A U-shaped gasket (6) is arranged between the head of the connecting bolt (3) and the inner holder (5), and the number of the connecting bolts (3) penetrating through the U-shaped gasket (6) is two, and the two connecting bolts (3) are arranged in parallel.

3. The rolling body structure of a large slewing bearing according to claim 1, characterized in that: An oil outlet groove (11) is arranged on the contact surface between the pin shaft (2) and the roller body (1), an inside of the pin shaft (2) is provided with a butter channel (9), one end of the butter channel (9) is communicated with the oil outlet groove (11), and the other end of the butter channel (9) penetrates through the outer holder (7).

4. The rolling body structure of a large slewing bearing according to claim 3, characterized in that: A plunger (10) for sealing the butter channel (9) is arranged on the outer holder (7).

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