Excavator slewing bearing structure

Abstract

The utility model discloses a slewing bearing structure of an excavator, which comprises a slewing bearing inner ring and a slewing bearing outer ring, the slewing bearing inner ring is connected with the slewing bearing outer ring, and an inner tooth structure is arranged on the inner side wall of the slewing bearing inner ring. The end face of the slewing bearing inner ring is provided with first installation holes which are evenly distributed on the slewing bearing inner ring, the end face of the slewing bearing outer ring is provided with a second installation hole, a third installation hole, a fourth installation hole and a fifth installation hole, and the excavator protection device achieves the functions of protecting an excavator and facilitating entering and exiting and escaping.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, specifically to an excavator slewing bearing structure. Background Technology

[0002] Currently, the problem of slewing bearing mounting bolt breakage frequently occurs in domestic excavators during use. Due to the harsh operating environment of excavators, and the repeated digging, unloading, hammering, and slewing processes, the slewing bearing mounting bolts are repeatedly subjected to alternating loads, which can lead to the breakage of the bolt with the greatest stress. Once one bolt breaks, the stress on the remaining bolts increases, accelerating their breakage. Repairing broken bolts is difficult, and if workers fail to detect the breakage, it can lead to serious safety accidents. In order to further improve the quality of excavator products and effectively ensure that the slewing bearing mounting bolts do not break, it is necessary to effectively distribute the bolts.

[0003] Therefore, designing a structure that distributes stress more evenly, thereby extending the service life of bolts and reducing the probability of bolt breakage, is the problem that the inventors want to solve. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a slewing bearing structure for excavators that can achieve more uniform stress distribution, thereby extending the service life of bolts and reducing the probability of bolt breakage.

[0005] The technical solution adopted by this utility model device is: a slewing bearing structure for an excavator, which includes an inner slewing bearing ring and an outer slewing bearing ring. The inner slewing bearing ring is connected to the outer slewing bearing ring. The inner sidewall of the inner slewing bearing ring is provided with an internal tooth structure. The end face of the inner slewing bearing ring is provided with a first mounting hole, and the first mounting holes are evenly distributed on the inner slewing bearing ring. The end face of the outer slewing bearing ring is provided with a second mounting hole, a third mounting hole, a fourth mounting hole, and a fifth mounting hole.

[0006] Furthermore, the third mounting hole, the fourth mounting hole, the fifth mounting hole, and the second mounting hole are arranged clockwise on the end face of the outer ring of the slewing bearing.

[0007] Furthermore, the end face of the outer ring of the slewing bearing is divided into four regions: the right region, the rear region, the left region, and the front region. The third mounting hole is evenly distributed on the inner side of the right region, the fourth mounting hole is evenly distributed on the inner side of the rear region, the fifth mounting hole is evenly distributed on the inner side of the left region, and the second mounting hole is evenly distributed on the inner side of the front region.

[0008] Furthermore, the right and left areas are symmetrically arranged, the front and rear areas are symmetrically arranged, the arc angles corresponding to the right and left areas are both 60°, and the arc angles corresponding to the front and rear areas are both 120°.

[0009] Furthermore, the diameter of the circle containing the first mounting hole is 1450mm, and all the holes on the outer ring of the slewing bearing are arranged on the circumference of the same circle with a diameter of 1700mm.

[0010] Furthermore, the number of the first mounting holes is 60, and the total number of all holes on the outer ring of the slewing bearing is 52.

[0011] The beneficial effects of this utility model device are:

[0012] 1. This utility model adopts a unique hole design and accurately calculates the reasonable distribution of holes under uniform force. The holes on the outer ring of the slewing bearing are further precisely divided according to the force conditions of the excavator in the front, back, left and right directions, thereby realizing the functions of protecting the excavator and facilitating entry, exit and escape. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembly structure of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1-Inner ring of slewing bearing; 2-First mounting hole; 3-Outer ring of slewing bearing; 4-Second mounting hole; 5-Third mounting hole; 6-Fourth mounting hole; 7-Fifth mounting hole; 8-Internal gear structure. Detailed Implementation

[0015] The present invention will be further described below with reference to specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0016] Example 1: See Figure 1 This utility model provides a structural schematic diagram of an excavator slewing bearing structure, which includes a slewing bearing inner ring 1 and a slewing bearing outer ring 3. The slewing bearing inner ring is connected to the slewing bearing outer ring 3, and the inner sidewall of the slewing bearing inner ring 1 is provided with an internal tooth structure 8.

[0017] The inner ring 1 of the slewing bearing has a first mounting hole 2 on its end face, and the first mounting holes 2 are evenly distributed on the inner ring 1 of the slewing bearing. The diameter of the circle containing the first mounting hole 2 is φ1=1450mm, and there are 60 first mounting holes 2. The outer ring bolts are the same as the inner ring bolts. Therefore, the hole diameters on the inner ring 1 and the outer ring 3 of the slewing bearing are the same.

[0018] The outer ring 3 of the slewing bearing is provided with a second mounting hole 4, a third mounting hole 5, a fourth mounting hole 6, and a fifth mounting hole 7. All the holes on the outer ring 3 of the slewing bearing are located on the circumference of the same circle with a diameter of φ2=1700mm.

[0019] The specifications and quantity of the inner ring bolts can be calculated based on the maximum stress posture during the excavator's operation, denoted as n1=60. The ratio of the number of inner and outer ring bolts is equal to the inverse ratio of the diameters of the inner and outer ring bolts, i.e., n1:n2=φ2:φ1. Therefore, n2=n1×φ1÷φ2=60×1450÷1700=51.18. Rounding to the nearest integer, we get n2=52, which means the total number of all holes on the outer ring 3 of the slewing bearing is 52.

[0020] The third mounting hole 5, the fourth mounting hole 6, the fifth mounting hole 7, and the second mounting hole 4 are arranged clockwise on the end face of the outer ring 3 of the slewing bearing. Based on the stress conditions of the slewing bearing and other factors, the distribution rule of the outer ring holes is denser at the front and rear, and sparser on the left and right. The end face of the outer ring 3 of the slewing bearing is divided into four regions, respectively from... Figure 1 Starting from the upper middle, the right, rear, left, and front sections are distributed clockwise. The third mounting hole 5 is evenly distributed inside the right section, the fourth mounting hole 6 is evenly distributed inside the rear section, the fifth mounting hole 7 is evenly distributed inside the left section, and the second mounting hole 4 is evenly distributed inside the front section. The right and left sections are symmetrically arranged, as are the front and rear sections. The arc angles corresponding to the right and left sections are both 60°, and the arc angles corresponding to the front and rear sections are both 120°.

[0021] With the center of the slewing bearing as the origin of the coordinate system, establish a coordinate system in which the vertical Y-axis intersects the horizontal X-axis perpendicularly. Based on the definition of quadrants, establish the first quadrant, second quadrant, third quadrant, and fourth quadrant from the upper right part of the coordinate system counterclockwise.

[0022] Each quadrant is divided into three regions by angle. The included angle between the X and Y axes is calculated, resulting in three regions: Region 1 (0-30°), Region 2 (30°-60°), and Region 3 (60°-90°). The ratio of the number of bores in each region is 1:sin30°:sin60°. Therefore, the calculated ratio of bores in Region 1, Region 2, and Region 3 is 5.5:4.8:2.7. After optimization and rounding, the numbers are 5.5, 5, and 2.5 respectively. Regions 1 and 3 each occupy 0.5 bores on the dividing line. The distribution of bores in the other three quadrants is the same, thus distributing the three bores on the outer ring of the slewing bearing.

[0023] This utility model adopts a unique hole design and accurately calculates the reasonable distribution of holes under uniform force. The holes on the outer ring 3 of the slewing bearing are further precisely divided according to the force conditions of the excavator in the front, back, left and right directions, thus realizing the functions of protecting the excavator and facilitating entry, exit and escape.

Claims

1. An excavator swing bearing structure, characterized by: The application relates to a slewing bearing, which comprises a slewing bearing inner ring (1) and a slewing bearing outer ring (3), the slewing bearing inner ring is connected with the slewing bearing outer ring (3), an inner side wall of the slewing bearing inner ring (1) is provided with an inner tooth structure (8), a first mounting hole (2) is arranged on an end surface of the slewing bearing inner ring (1) and is uniformly distributed on the slewing bearing inner ring (1), a second mounting hole (4), a third mounting hole (5), a fourth mounting hole (6) and a fifth mounting hole (7) are arranged on an end surface of the slewing bearing outer ring (3).

2. The excavator slew bearing structure of claim 1, wherein: The third mounting hole (5), the fourth mounting hole (6), the fifth mounting hole (7) and the second mounting hole (4) are arranged in a clockwise direction on the end surface of the slewing bearing outer ring (3).

3. The excavator slew bearing structure of claim 2, wherein: The end surface of the slewing bearing outer ring (3) is divided into four regions, i.e. a right region, a rear region, a left region and a front region, the third mounting holes (5) are uniformly arranged on the inner side of the right region, the fourth mounting holes (6) are uniformly arranged on the inner side of the rear region, the fifth mounting holes (7) are uniformly arranged on the inner side of the left region, and the second mounting holes (4) are uniformly arranged on the inner side of the front region.

4. The excavator slew bearing structure of claim 3, wherein: The right region and the left region are symmetrically arranged, the front region and the rear region are symmetrically arranged, the corresponding arc angles of the right region and the left region are both 60 DEG, and the corresponding arc angles of the front region and the rear region are both 120 DEG.

5. The excavator slew bearing structure of claim 1, wherein: The diameter of a circle where the first mounting holes (2) are located is 1450 mm, all the holes on the slewing bearing outer ring (3) are arranged on the circumference of a same circle, and the diameter of the circle is 1700 mm.

6. A excavator slew bearing structure according to claim 5, characterized in that: The number of the first mounting holes (2) is 60, and the total number of all the holes on the slewing bearing outer ring (3) is 52.

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