KR100985027B1 - a swing bearing mounting structure for utilizing the leveling system of heavy construction equipment - Google Patents

Abstract

The present invention relates to a swing bearing mounting structure for a heavy equipment leveling system, comprising: a swing bearing mounting frame mounted between an upper swing structure and a lower traveling body and fixed to a swing bearing formed under the upper swing structure; A support frame seated and fixed to the center of the lower frame formed on the lower running body; A tilt frame having sidewalls and rotatably connected between an upper fixing part and a lower fixing part between the swing bearing mounting frame and the support frame, respectively; A lower portion pivotally fixed to one side of the support frame, and each of the front, rear, and the retracting and extending driving corresponding to the front and rear and left and right directions of the first tilt axis A and the second tilt axis B; In the swing bearing mounting structure for heavy equipment leveling system comprising a; left and right hydraulic cylinder,

The swing bearing mounting frame includes a plurality of ribs having a bearing support portion on which the lower portion of the swing bearing is seated, and extending inwardly of an edge adjacent to the support portion to distribute and support loads transmitted from the swing bearing; A pair of first cylinder holders protruding downward from one side of the edge and pivotally fixing one side of the front and rear hydraulic cylinders corresponding to the front and rear directions of the first tilt shaft A; And a second cylinder holder protruding downward from the rib and pivotally fixing one side of the left and right hydraulic cylinders corresponding to the left and right directions of the second tilt shaft (B). According to the present invention, the fastening portion formed between the first cylinder holder and the second cylinder holder forms an open structure in which the fastening portion is not interfered with or blocked by the side wall of the tilt frame, thereby providing easy access for the operator and the assembly tool for mounting the swing bearing. It is easy to increase manufacturing efficiency and maintains rigidity with skeleton structure by a large number of ribs, so it can effectively distribute and support loads applied through upper swing structure and swing bearings. There is this.

Heavy machinery, leveling system, tilt device, swing bearing mounting frame, cylinder holder

Description

Swing bearing mounting structure for utilizing the leveling system of heavy construction equipment

1 is a perspective view schematically showing an excavator equipped with a conventional heavy equipment leveling system,

Figure 2 shows a conventional heavy equipment leveling system,

Figure 2a is a perspective view schematically showing a swing bearing installed in the upper swing body,

Figure 2b is a perspective view schematically showing the structure of a conventional tilt device mounted to the lower portion of the swing bearing,

Figure 2c is a plan view schematically showing a lower frame on which a conventional tilt device is seated,

Figure 3 is a perspective view of a swing bearing mounting frame according to the present invention,

4 is a bottom perspective view of a swing bearing mounting frame according to the present invention;

Figure 5 is a schematic perspective view showing a state in which the swing bearing mounting frame is mounted to the swing bearing lower portion.

Explanation of symbols used in the main part of the drawing

1: Upper swing frame 2, 20: Swing bearing mounting frame

3: tilt frame 4: support frame

5: undercarriage 12: work tool

22: rib 24: first cylinder holder

25: second cylinder holder 26: mounting slot

27: fastening portion 31: pivot shaft

The present invention relates to a swing bearing mounting structure for heavy equipment leveling systems, in particular swings while maintaining the structural rigidity that can support the load when installing the swing bearing and the swing bearing mounting frame on the lower portion of the upper swing in the heavy equipment leveling system The present invention relates to a swing bearing mounting structure for a heavy equipment leveling system that is improved to easily adjust a tightening torque for supporting a swing bearing under a bearing mounting frame.

Conventionally, heavy equipment such as excavators and harvesters for wood felling is one of the dedicated equipment suitable for carrying out construction work and logging work by moving not only flat or uneven ground but also a hilly slope or slope.

Such heavy equipment can optionally be equipped with a work tool including a header for logging operations such as buckets, hydraulic saws and electric saws at the end of the boom, depending on the work demand. Since the work is carried out while moving the slope, the equipment is in danger of being tilted or rolled over to one side due to the slope of the ground.

For example, the slope of the equipment is changed when the heavy equipment performs or moves the work on the ground E having a predetermined slope with respect to the horizontal plane H such as a hill or a slope. Here, the inclination of the equipment refers to the range in which the heavy equipment and the upper swinging body or the lower running body is inclined forward, rearward, and laterally with respect to the horizontal plane (H). Can be overturned.

In particular, heavy-duty leveling systems, such as excavators and tree harvesters for wood harvesting, move forward or rearward and sidewardly of the undercarriage or tilt at an angle when the slope changes due to the inclination of the ground E. A leveling system for heavy machinery has been developed that employs a tilt mechanism that supports tilting so that equipment does not roll over. As an example of such a tilt mechanism, a tilt device for a vehicle cab by Rust Felix Edward Joseph is developed. (Korean Patent Publication No. 2001-0014291 dated February 26, 2001).

1 and 2, the conventional tilt device 11 forms a tilt mechanism of a substantially cylindrical shape, the swing bearing mounting frame 2 has a substantially cylindrical side wall (2a) and the upper pivot ( It is fixed to the swing bearing 9 formed in the lower portion of 1), the support frame 4 is fixed to the lower frame 6 formed on the lower running body 5, the tilt frame 3 is the swing bearing mounting frame ( 2) is provided with a cylindrical strip-shaped side wall (3a) surrounding it and is rotatably fixed to the side walls of each of the swing bearing mounting frame (2) and the support frame (4).

The left and right track chassis 11 is supported by the respective arms 6a and 6b extending to both sides front and rear sides of the lower frame 6 for driving the heavy equipment, and the tilt and tilt of the upper swing structure 1 The support frame 4 is seated so as to form the lowermost part of the tilting device 11 at an approximately center position of the lower frame 6 for adjusting the angle, and the swing bearing mounting frame forming the uppermost part of the tilting device 11 ( 2) is fixed to the lower portion of the swing bearing (9).

A pair of hydraulic cylinders 7a, 7b, 8a, 8b in the front and rear directions and the left and right directions are coupled to each other on the tilt device 11 so as to be orthogonal to each other on the side wall 2a of the swing bearing mounting frame 2. Tilt axes A in the front and rear directions perpendicular to each other and tilt axes B in the left and right directions are formed.

Therefore, when the ground E is inclined at a predetermined angle relative to the horizontal plane H, even if the lower traveling body 5 is in inclined contact with the ground E, the swing bearing mounting portion 2 is hydraulically operated. The posture of the upper swing body 1 is kept substantially parallel to the horizontal plane while tilting in the front-back direction and the left-right direction by the extension and contraction driving of the cylinder, respectively.

For example, when the upper swing body 1 is inclined forward by the tilt axis A, the driver drives the leveling operation lever and a hydraulic pump (not shown) to drive the hydraulic cylinder 7 on the front side of the tilt device 1. By raising the) and at the same time adjusting the rear hydraulic cylinder (8) to be lowered, even if the lower traveling body 5 is inclined due to the inclination of the ground, the upper swinging structure (1) is approximately horizontal (H) Leveling of the equipment is carried out in a posture perpendicular to the plane or in a posture parallel to the horizontal plane (H).

However, since the conventional swing bearing mounting frame is configured to be inserted into the cylindrical side wall of the tilt frame, structural interference occurs, so that installation of the swing bearing is difficult, and unless the part of the side wall of the tilt frame is cut off separately, There is a disadvantage that the access to the manufacturing tool is very difficult.

In order to solve this problem, when cutting or modifying the side wall of the swing bearing mounting part, there is a problem that may result in structural degradation.

In addition, the conventional swing bearing mounting portion has a limitation in distributing the load structurally when the equipment or the upper swing is inclined by supporting the load through the cylindrical sidewalls of which the upper and lower portions are open, so that the thickness of the cylindrical material needs to be increased. And, there is a problem of increasing the required number of materials and manufacturing maneuver.

On the other hand, as another embodiment of the tilt mechanism for the heavy equipment leveling system, the logging machine swing-house leveling mechanism of US Patent No. 6,173,973 (2001.01.16), registered by Timberjack Inc. A turntable support technique is disclosed in which the extended flange is welded integrally and bolted to the inner ring of the swing bearing.

However, the turntable support fixed to the swing bearing has a problem in that it is structurally complicated and difficult to manufacture by forming a separate journal shaft support for tilt drive cylinders coupled to the ball joint at the side and supporting the turntable shaft at the bottom thereof.

Therefore, the present invention is to solve the above problems,

It is an object of the present invention for a heavy equipment leveling system that can prevent interference during tilting operation of the tilt frame and swing bearing mounting frame and improve the accessibility of workers and assembly tools between the tilt frame and the swing bearing mounting frame, and thereby improve the manufacturing efficiency. It is to provide a swing bearing mounting structure.

Another object of the present invention is to swing the heavy equipment leveling system that can efficiently maintain the structural rigidity by supporting the load transmitted through the swing bearing in the horizontal direction when installing the swing bearing mounting frame on the lower portion of the upper swing body Its purpose is to provide a bearing mounting structure.

In order to achieve the above object, the present invention

It is mounted between the upper swing structure and the lower driving body,

A swing bearing mounting frame fixed to a swing bearing formed under the upper swing structure;

A support frame seated and fixed to the center of the lower frame formed on the lower running body;

An upper fixing part and a lower fixing part are installed between the swing bearing mounting frame and the support frame, respectively, and the upper fixing part is configured to form the first tilt shaft A in the front-rear direction. A tilt frame rotatably coupled to one side, the lower fixing part rotatably coupled to one side of the support frame to form a second tilt shaft B in a horizontal direction orthogonal to the first tilt shaft A;

A lower portion is pivotably fixed to one side of the support frame, and each of the front, rear, and driving that extends and contracts in correspondence with the front and rear and left and right directions of the first tilt shaft A and the second tilt shaft B, respectively. In the swing bearing mounting structure for heavy equipment leveling system comprising a; left and right hydraulic cylinder,

The swing bearing mounting frame,

A plurality of ribs having a bearing support portion on which a lower portion of the swing bearing is seated, extending inwardly of an edge adjacent to the support portion to distribute and support loads transmitted from the swing bearing;

A pair of first cylinder holders protruding downward from one side of the edge and pivotally fixing one side of the front and rear hydraulic cylinders in a pivotal direction corresponding to the front-rear direction of the first tilt shaft A; And

And a second cylinder holder protruding downwardly from the rib and pivotally fixing one side of the hydraulic cylinders on the left and right sides in a pivotal direction corresponding to the left and right directions of the second tilt shaft B. do.

In addition, the rib is characterized in that it is formed of a skeleton structure having each of the transverse ribs and longitudinal ribs extending across the inner edge.

In addition, the first cylinder holder is integrally formed on the rim, and the second cylinder holder is characterized in that integrally formed on the rib.

In addition, the upper fixing part of the tilt frame is fixedly coupled to the pivot shaft so that the swing bearing mounting frame can be tilted in the front and rear direction to the first cylinder holder, and the second cylinder holder can tilt the swing bearing mounting frame in the left and right direction. The left and right hydraulic cylinders are characterized in that the pivot rotation is made to be rotatable.

In addition, the swing bearing mounting structure for the heavy-duty leveling system according to the present invention has an interior formed between the first cylinder holder and the second cylinder holder when the upper fixing portion is coupled to the first cylinder holder is formed on the side wall of the tilt frame. It is characterized in that the configuration further comprises a fastening portion formed adjacent to the rib so as not to be blocked by.

In addition, a plurality of fastening holes for coupling the fixing bolt for fastening the swing bearing to the fastening portion is formed through, the first cylinder holder is formed on the outside than the diameter (D) formed by the arrangement of the fastening holes, The second cylinder holder is configured to be configured inside of the diameter (D).

In addition, the mounting portion is characterized in that the mounting slot is formed through the long hole adjacent to the fastening hole so as to communicate with the lower portion of the swing bearing.

Hereinafter, the configuration of the lumber support structure according to the present invention with reference to the accompanying drawings in detail as follows.

1 is a perspective view schematically showing an excavator equipped with a conventional heavy equipment leveling system, FIG. 2 is a conventional heavy equipment leveling system, and FIG. 2A is a perspective view schematically showing a swing bearing installed below the upper swing structure. 2B is a perspective view schematically showing a structure of a conventional tilt device mounted to a lower portion of a swing bearing, FIG. 3 is a perspective view showing a swing bearing mounting frame according to the present invention, and FIG. 4 is according to the present invention. Bottom perspective view of the swing bearing mounting frame, Figure 5 is a schematic perspective view showing a state in which the swing bearing mounting frame is mounted to the swing bearing lower portion.

The swing bearing mounting frame 20 according to the present invention adjusts the inclination or inclination of the upper swing body 1 when the inclination of the heavy equipment changes due to the inclination or obstacle of the ground E, so as to maintain the leveling of the heavy equipment. It is applied to the lower part of the swing bearing (9).

In the description of the present invention, as configured in the conventional tilt device 11 for heavy equipment leveling system, the upper swing body 1 and the lower running body 5, the tilt frame (3), the support frame (4), lower The working device 12 including the frame 6, the header for harvesting, the bucket, and the like can be applied in the same manner as in the prior art and will be described with the same reference numerals.

Referring to the drawings, the swing bearing mounting structure for heavy equipment leveling system according to the present invention,

It is mounted between the upper swing body (1) and the lower running body (5),

A swing bearing mounting frame (20) fixed to the swing bearing (9) formed below the upper swing structure (1);

A support frame (4) fixedly seated at a central side of the lower frame (6) formed at the lower traveling body (5);

It has a side wall (3a), the upper fixing part 13 and the lower fixing part 14 is installed between the swing bearing mounting frame 20 and the support frame 4, respectively, the upper fixing part 13 ) Is rotatably coupled to one side of the swing bearing mounting frame 20 to form the first tilt shaft A in the front-rear direction, and the lower fixing portion 14 is orthogonal to the first tilt shaft A. A tilt frame (3) rotatably coupled to one side of the support frame (4) to form a second tilt axis (B) in a left and right direction;

A lower portion of the support frame 4 is pivotally fixed to one side thereof, and each of the front and rear parts which extends and contracts in correspondence to the front and rear directions and the left and right directions of the first tilt shaft A and the second tilt shaft B, respectively. In the swing bearing mounting structure for a heavy equipment leveling system, comprising; rear, left and right hydraulic cylinders (7a, 7b) (8a, 8b),

The swing bearing mounting frame 20,

And a bearing support portion 21 on which the lower portion of the swing bearing 9 is seated, which extends into the edge 23 adjacent to the support portion 21 to distribute and distribute the load transmitted from the swing bearing 9. A plurality of ribs 22 supporting;

As long as it protrudes downwardly to one side of the rim 23 and pivotally pivots one side of each of the front and rear hydraulic cylinders 7a and 7b corresponding to the front and rear directions of the first tilt shaft A. FIG. A pair of first cylinder holders 24; And

A second cylinder holder protruding downward from the rib 22 and pivotally fixing one side of the left and right hydraulic cylinders 8a and 8b corresponding to the left and right directions of the second tilt shaft B; 25);

In the present invention, the rib 22 is formed of a skeleton structure having each of the horizontal ribs 22a and the longitudinal ribs 22b extending across the inside of the rim 23, the swing bearing 9 Distributes the load transmitted from the inner or horizontal direction of the frame 23 of the body to support the function.

In addition, the first cylinder holder 24 is supported by a flange 34 connected to the edge 23 on both sides, preferably the first cylinder holder 24 is formed integrally with the edge 23 The second cylinder holder 25 is integrally connected to and supported by the rib 22.

Meanwhile, the upper fixing part 13 of the tilt frame 3 is fixedly coupled to the first shaft holder 24 by the pivot shaft 31 so that the swing bearing mounting frame 20 can be tilted in the front-rear direction. The cylinder holder 24 is pivotally pivotally coupled to the front end portions of the left and right hydraulic cylinders 8a and 8b so as to be able to tilt the swing bearing mounting frame 20 in the left and right directions.

In addition, the swing bearing mounting structure for the heavy equipment leveling system according to the present invention, when the upper fixing portion 13 of the tilt frame 3 is coupled to the first cylinder holder 24, the first cylinder holder 24 Fastening portion 27 adjacent to the rib 22 such that the lower side surface 32 formed between the second cylinder holder 25 and the inner space is not blocked by the side wall 3a of the tilt frame 3. Is composed.

In addition, the fastening portion 27 is formed through a plurality of fastening holes 28 for coupling the fixing bolt 30 for fastening the swing bearing, the fastening hole 28 to communicate with the lower of the swing bearing (9) A mounting slot 26 is formed which is penetrated adjacent to the long hole. Preferably, the mounting slot 26 is configured between the flange 34 and the second cylinder holder 25 so that the lower side 32 is not blocked by the side wall 3a of the tilt frame 3. It is preferable.

Since the fastening part 27 forms an open structure in which the space of the lower side surface 32 is blocked by the side wall 3a of the tilt frame 3 or the interference is removed, as shown in FIGS. 4 and 5. Likewise, when the swing bearing 9 is installed, a fastening tool (not shown) such as a swing bolt fastening bolt 30 or a torque wrench is accessible to the mounting slot 26 and the fastening portion 27, as well as the fastening torque. Adjustment and assembly work is allowed.

In addition, the swing bearing mounting structure for a heavy equipment leveling system according to the present invention, the first cylinder holder 24 is a diameter formed by the arrangement of a plurality of swing bearing fastening holes 28 formed inside the rim 23 ( D) is formed on the outside, the second cylinder holder 25 is formed on the inner side than the diameter (D) formed by the arrangement of the plurality of swing bearing fastening holes 28 formed inside the rim (23). It is preferable to the tilting operation of the swing bearing mounting frame 20.

Each of the first cylinder holder 24 and the second cylinder holder 25 is formed with a shaft coupling hole 33, the pivot shaft 31 or the cylinder in the shaft coupling hole 33 so as to pivot pivot The sleeve for fixing can be further comprised.

In the embodiment of the present invention, the mounting slot 26 formed in the fastening portion 27 is adjacent to the arrangement position of the fastening hole 28 to facilitate the access of workers and tools according to the specifications of the swing bearing 9 It is deformable to have a plurality of long hole structures.

In the description of the present invention, the swing bearing mounting frame 20 can be attached and detached according to various specifications of the conventional swing bearing 9 through bolting assembly, and a penetration portion is formed in the center of the swing bearing mounting frame 20. In addition, turning joints, hydraulic piping and electrical equipment can be installed.

Hereinafter, the operational effects of the swing bearing mounting structure for heavy equipment leveling system according to the present invention will be described.

In the swing bearing mounting structure for the heavy equipment leveling system according to the present invention, the lower portion of the swing bearing 9 is seated on the support portion 21 formed on the upper portion of the swing bearing mounting frame 20, and is supported by the side flange 34. The first cylinder holder 24 is inserted into the upper fixing portion 13 formed in the tilt frame 3 and rotatably coupled by the pivot shaft 31.

At this time, since the first cylinder holder 24 extends from the edge 23 and protrudes downward to have a predetermined height, the first tilt shaft A is predetermined from the rib 22 extending inward from the edge 23. The side wall of the tilt frame 3 is formed on the fastening portion 27 spaced apart from each other and thus extending inwardly from the rim 23 between the first cylinder holder 24 and the second cylinder holder 25. The lower side surface 32 is in an open structure in a state spaced apart from 3a.

As a result, the lower side surface 32 is not sealed or blocked by the side wall 3a of the tilt frame 3 between the first cylinder holder 24 and the second cylinder holder 25 and is not interfered with.

Therefore, the swing bearing mounting structure for the heavy equipment leveling system according to the present invention allows the operator to access the fastening portion 27 directly from the lower portion of the swing bearing mounting frame 20 to assemble the swing bolt fastening bolt 30 or swing The bearing 9 can be conveniently mounted, and at the same time, the accessibility of a tool such as a torque wrench on the mounting slot 26 is good, so that the tightening torque of the fixing bolt 30 can be properly adjusted.

In the present invention, the front end portions of the hydraulic cylinders 8a and 8b in the left and right directions are mounted on the second cylinder holder 25, and the upper fixing portion 13 of the tilt frame 3 is mounted on the first cylinder holder 24. It is more preferable to improve the assembly labor by assembling pivotally by the pivot shaft 31 through, and then adjusting the tightening torque on the fastening part 27 after mounting the swing bearing 9 to the support part 21. Do.

On the other hand, the load transmitted to the swing bearing mounting frame 28 through the upper swing body 1 and the swing bearing 9 is supported through a skeleton structure formed by the rib 22 extending into the edge 23. . At this time, the load applied to the swing bearing mounting frame 20 is distributed by the horizontal ribs 22a and the vertical ribs 22b constituting the skeleton structure, and each of the ribs 22a 22b is arranged in a plurality of arrangements. In the case of forming, the load distributing effect is more efficiently performed.

That is, the load acting on the support portion 21 in contact with the lower portion of the swing bearing 9 is in the transverse direction and the longitudinal direction of the rib 22 by the frame connecting structure of the transverse rib 22a and the longitudinal rib 22b. Since each rib 22a, 22b extends inside the edge 23 of the swing bearing mounting frame 20 and acts as a skeleton to maintain rigidity, the thickness of the side walls 3a is not enlarged as in the related art. It can carry out the functions of load balancing and supporting, while maintaining less material required.

On the other hand, in the tilting action of the swing bearing mounting frame 20, when the heavy equipment moves the inclined ground (E) such as hills or slopes, the heavy equipment has a predetermined inclination inclined in the front and rear and left and right directions, etc. When the swing bearing mounting frame 20, which is equipped with the swing bearing 9 between the lower running body 1 and the lower running body 5, is also inclined correspondingly, the front and rear sides are corrected so as to correct the inclination of the heavy equipment so that the heavy equipment does not overturn. The front and rear hydraulic cylinders 7a and 7b installed in the direction and the left and right hydraulic cylinders 8a and 8b installed in the left and right directions respectively extend and contract to the preset range, or the respective hydraulic cylinders 7a, 7b and 8a. Since the swing bearing mounting frame 20 is tilted relative to the first tilt axis A and the second tilt axis B as the 8b) cooperates with the stretching and contraction driving at the same time, the posture is the same as in the related art. Description will be omitted.

Description of the above-described swing bearing mounting structure for heavy equipment leveling system according to the present invention is intended to describe in detail enough to be able to easily carry out the invention by those skilled in the art to which the present invention belongs, The spirit and scope of the present invention are not limited.

Above, the swing bearing mounting structure for the heavy equipment leveling system according to the present invention forms an open structure in which the fastening portion formed between the first cylinder holder and the second cylinder holder forms an open structure that is not interfered or blocked by the side wall of the tilt frame. It is very easy to access workers and assembly tools to increase the manufacturing efficiency, and by maintaining the rigidity of the skeleton structure by a large number of ribs to efficiently distribute and support the load applied through the upper swing body and the swing bearing Its effect is very excellent.

Claims (7)

It is mounted between the upper swing structure and the lower driving body, A swing bearing mounting frame fixed to a swing bearing formed under the upper swing structure; A support frame seated and fixed to the center of the lower frame formed on the lower running body; An upper fixing part and a lower fixing part are installed between the swing bearing mounting frame and the support frame, respectively, and the upper fixing part is configured to form the first tilt shaft A in the front-rear direction. A tilt frame rotatably coupled to one side, the lower fixing part rotatably coupled to one side of the support frame to form a second tilt shaft B in a horizontal direction orthogonal to the first tilt shaft A; A lower portion is pivotally fixed to one side of the support frame, and each of the front, rear, and driving that extends and contracts in correspondence with the front and rear and left and right directions of the first tilt shaft A and the second tilt shaft B, respectively. In the swing bearing mounting structure for heavy equipment leveling system comprising a; left and right hydraulic cylinder, The swing bearing mounting frame, A plurality of ribs having a bearing support portion on which a lower portion of the swing bearing is seated, extending inwardly of an edge adjacent to the support portion to distribute and support loads transmitted from the swing bearing; A pair of first cylinder holders protruding downward from one side of the edge and pivotally fixing one side of the front and rear hydraulic cylinders in a pivotal direction corresponding to the front-rear direction of the first tilt shaft A; And And a second cylinder holder protruding downward from the rib and pivotally fixing one side of the left and right hydraulic cylinders corresponding to the left and right directions of the second tilt shaft B. The rib is a swing bearing mounting structure for a heavy equipment leveling system, characterized in that it is formed of a skeleton structure having each of the transverse ribs and longitudinal ribs extending across the inner edge. delete The method according to claim 1, The first cylinder holder is integrally formed on the rim, and the second cylinder holder is integrally formed on the ribs swing bearing mounting structure for a heavy equipment leveling system. The method according to claim 1, The upper fixing part of the tilt frame is fixedly coupled to the pivot shaft so that the swing bearing mounting frame can be tilted forward and backward on the first cylinder holder, and the second cylinder holder is configured to tilt the swing bearing mounting frame in the left and right directions. A swing bearing mounting structure for a heavy equipment leveling system, characterized in that the left and right hydraulic cylinders are pivotally rotatable. The method according to claim 1, When the upper fixing part is coupled to the first cylinder holder, a fastening part formed adjacent to the rib such that the lower side surface formed between the first cylinder holder and the second cylinder holder is not blocked by the side wall of the tilt frame. Swing bearing mounting structure for heavy-duty leveling system, characterized in that further configuration. The method according to claim 5, A plurality of fastening holes through which fastening bolts for fastening swing bearings are coupled to the fastening part are formed therethrough, and the first cylinder holder is formed on an outer side of the diameter D formed by the arrangement of the fastening holes. The cylinder holder is a swing bearing mounting structure for a heavy equipment leveling system, characterized in that configured to be formed inside the diameter (D). The method according to claim 6, And a mounting slot penetrates through the long hole adjacent to the fastening hole so that the mounting slot communicates with the lower portion of the swing bearing.

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