Three-row roller slewing bearing for a crawler excavator

Abstract

The utility model discloses a three-row roller slewing bearing for crawler excavator, including inner race, outer ring, first roller, second roller and third roller, first roller, second roller and third roller are multiple, and upper outer ring and lower outer ring are connected upside down, and outer ring is equipped with center hole, and the side wall on center hole is equipped with first recess, and the side wall on first recess is equipped with second recess, and outer ring is equipped with oil hole in, and oil hole is linked together with first recess, and inner race is located on center hole, and the outside of inner race is equipped with lug, and lug is inserted into first recess, and first roller is set up on the top of lug, and with the top wall of first recess abuts, and second roller is set up on the bottom wall of first recess, and with the bottom of lug abuts, and third roller is located in second recess, and third roller and the side wall of second recess and the side wall of lug abut respectively. The utility model can better bear the force from different directions, and better adapt to the use of crawler excavator.

Description

Technical Field

[0001] This utility model relates to the field of engineering equipment technology, and in particular to a three-row roller slewing bearing for a tracked excavator. Background Technology

[0002] A tracked excavator is a type of construction machinery equipped with tracked walking devices, primarily used for excavation operations in complex terrain. Its features include strong traction and good maneuverability, making it suitable for working in harsh environments such as mud and slopes. The digging section of a tracked excavator often needs to rotate to adjust its position, and this rotational motion relies heavily on the use of a slewing bearing.

[0003] Conventional slewing bearings have insufficient load-bearing capacity, while tracked excavators often need to operate under high loads. Conventional slewing bearings are often unable to meet the needs of tracked excavators. At the same time, under light loads, most slewing bearings are often designed to only consider the force in one direction, and the forces in other directions are negligible due to their small size. However, when tracked excavators are operating under high loads, the forces in other directions are also large, and slewing bearings that only consider the force in one direction are prone to damage.

[0004] On the other hand, conventional slewing bearings usually have pre-installed lubricating oil inside, but this cannot be effectively replenished after installation. Under high loads, the lubricating oil is consumed quickly, which can easily lead to insufficient lubricating oil. Utility Model Content

[0005] The purpose of this invention is to provide a three-row roller slewing bearing for tracked excavators, which can solve one or more of the above-mentioned problems.

[0006] According to one aspect of this utility model, a three-row roller slewing bearing for a tracked excavator is provided, comprising an inner ring, an outer ring, a first roller, a second roller, and a third roller.

[0007] There are multiple first rollers, second rollers, and third rollers.

[0008] The outer ring includes an upper outer ring and a lower outer ring, which are connected vertically. The outer ring has a central hole, a first groove on the sidewall of the central hole, and a second groove on the sidewall of the first groove. An oil hole is located inside the outer ring and communicates with the first groove.

[0009] The inner ring is disposed on the central hole, and a protrusion is provided on the outer side of the inner ring, the protrusion extending into the first groove.

[0010] The first roller is mounted on the top of the protrusion and abuts against the top wall of the first groove. The second roller is mounted on the bottom wall of the first groove and abuts against the bottom of the protrusion. The third roller is located in the second groove and abuts against the side wall of the second groove and the side wall of the protrusion, respectively.

[0011] The beneficial effects of this utility model are as follows: In this utility model, multiple first rollers can form a first roller row, multiple second rollers can form a second roller row, and multiple third rollers can form a third roller row. The orientation of the third roller row is different from that of the first and second roller rows, which allows this utility model to better bear forces applied from different directions, thus better adapting to the use of tracked excavators, especially for high-load applications. The outer ring includes a connected upper and lower outer ring, facilitating the insertion of the inner ring protrusion into the first groove within the outer ring and simplifying the arrangement of each roller row, reducing the molding difficulty of this utility model. Furthermore, this utility model is equipped with oil holes, allowing the user to inject lubricating oil into these holes, ensuring timely replenishment of lubricating oil during operation and preventing insufficient lubrication of the roller rows.

[0012] In some embodiments, the dimensions of the first, second, and third rollers decrease sequentially. By not setting the roller dimensions in each roller row to be identical, stress concentration during operation can be reduced, thereby improving the service life of the invention.

[0013] In some embodiments, the present invention further includes a first retainer, which is sleeved on the inner ring, and the first roller is embedded in the first retainer. The first retainer can limit the position of the first roller to a certain extent, reducing the displacement of the first roller other than rotation.

[0014] In some embodiments, the present invention further includes a second retainer, which is sleeved on the inner ring, and the second roller is embedded in the second retainer. The second retainer can limit the position of the second roller to a certain extent, reducing the displacement of the second roller other than rotation.

[0015] In some embodiments, the present invention further includes a third retainer, which is sleeved on the protrusion, and the third roller is embedded in the third retainer. The third retainer can limit the position of the third roller to a certain extent, reducing the displacement of the third roller other than rotation.

[0016] In some embodiments, the present invention further includes a first sealing strip, wherein the top of the first groove has a first opening, one end of the first sealing strip is embedded in the outer ring, and the other end is mounted on the inner ring, and the first sealing strip closes the first opening. The first sealing strip can seal the first opening in the gap between the inner and outer rings, thereby reducing the probability of lubricating oil leakage from the opening.

[0017] In some embodiments, the present invention further includes a second sealing strip. The bottom of the first groove has a second opening. One end of the second sealing strip is embedded in the inner ring, and the other end is mounted on the outer ring. The second sealing strip closes the second opening. The second sealing strip can seal the second opening in the gap between the inner and outer rings, thereby reducing the probability of lubricating oil leakage from the opening.

[0018] In some embodiments, the present invention further includes an oil nozzle, which is mounted on the outer side wall of the outer ring and communicates with an oil hole. The oil nozzle facilitates the connection of an external lubricating oil supply device to the oil hole.

[0019] In some embodiments, the inner ring has a through hole in its center, and the inner wall of the through hole has gear teeth. Thus, an external power device can effectively drive the rotation of the inner ring by meshing with the gear teeth, such as a gear.

[0020] In some embodiments, the bottom of the upper outer ring has a protrusion, and the top of the lower outer ring has a recess, with the protrusion embedded within the recess. The protrusion and recess serve two purposes: firstly, they provide positioning, reducing connection errors between the upper and lower outer rings; secondly, they increase the contact area between the connected upper and lower outer rings, thereby improving the reliability of their connection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a three-row roller slewing bearing for a tracked excavator, according to one embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of a three-row roller slewing bearing for a tracked excavator without an outer ring, according to one embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of a three-row roller slewing bearing for a tracked excavator without an outer ring, according to one embodiment of the present invention.

[0024] Figure 4 This is a cross-sectional view of a structural schematic diagram of a three-row roller slewing bearing for a tracked excavator, according to one embodiment of the present invention.

[0025] Figure 5This is a cross-sectional view of the inner ring of a three-row roller slewing bearing for a tracked excavator, according to one embodiment of the present invention.

[0026] Figure 6 This is a cross-sectional view of the upper outer ring of a three-row roller slewing bearing for a tracked excavator, according to one embodiment of the present invention.

[0027] Figure 7 This is a cross-sectional view of the lower outer ring of a three-row roller slewing bearing for a tracked excavator, according to one embodiment of the present invention.

[0028] In the diagram: 1. Inner ring, 2. Outer ring, 3. First roller, 4. Second roller, 5. Third roller, 6. First cage, 7. Second cage, 8. First sealing strip, 9. Second sealing strip, 30. Third cage, 100. Oil nozzle, 21. Center hole, 211. First groove, 212. Second groove, 22. Protrusion, 10. First opening, 20. Second opening, 101. Through hole, 102. Gear tooth, 200. Oil hole, 201. Upper outer ring, 202. Lower outer ring, 203. Protrusion, 204. Recess. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The present invention relates to a three-row roller slewing bearing for a tracked excavator, comprising an inner ring 1, an outer ring 2, a first roller 3, a second roller 4, and a third roller 5.

[0031] The outer ring 2 includes an upper outer ring 201 and a lower outer ring 202. The upper outer ring 201 and the lower outer ring 202 can be connected to each other by screws. The bottom of the upper outer ring 201 is provided with a protrusion 203, and the top of the lower outer ring 202 is provided with a recess 204. After the upper outer ring 201 and the lower outer ring 202 are connected, the protrusion 203 is embedded in the recess 204.

[0032] The outer ring 2 has a central hole 21 in the middle, a first groove 211 on the side wall of the central hole 21, and a second groove 212 on the side wall of the first groove 211.

[0033] The inner ring 1 is provided on the central hole 21. The outer side of the inner ring 1 is provided with a protrusion 22. The protrusion 22 extends into the first groove 211. After the inner ring 1 is installed, there are gaps between the protrusion 22 and the side wall of the first groove 211, as well as between the outer side of the inner ring 1 and the central hole 21 of the outer ring 2.

[0034] There are multiple first rollers 3, second rollers 4, and third rollers 5, and the dimensions of the first rollers 3, second rollers 4, and third rollers 5 decrease sequentially.

[0035] The three-row roller slewing bearing used in this tracked excavator also includes a first cage 6, which is fixedly sleeved on the outer periphery of the inner ring 1 and located between the inner ring 1 and the outer ring 2. All the first rollers 3 are rotatably embedded in the first cage 6.

[0036] The first roller 3 is mounted on the top of the protrusion 22, and the first roller 3 will abut against the top wall of the first groove 211.

[0037] The three-row roller slewing bearing used in this tracked excavator also includes a second cage 7, which is fixedly sleeved on the outer periphery of the inner ring 1 and located between the inner ring 1 and the outer ring 2. All the second rollers 4 are rotatably embedded in the second cage 7.

[0038] The second roller 4 is mounted on the bottom wall of the first groove 211, and the second roller 4 will abut against the bottom of the protrusion 22.

[0039] The three-row roller slewing bearing used in this tracked excavator also includes a third cage 30, which is fixedly sleeved on the outer periphery of the protrusion 22 of the inner ring 1. The third roller 5 is embedded in the third cage 30, and the third roller 5 abuts against the side wall of the second groove 212 and the side wall of the protrusion 22 respectively, so the third roller 5 will be located between the inner ring 1 and the outer ring 2.

[0040] The first roller 3 and the second roller 4 are both set parallel to the horizontal plane, while the third roller 5 is set perpendicular to the horizontal plane. This allows the first roller 3, the second roller 4 and the third roller 5 to better withstand external forces in different directions when used together.

[0041] The three-row roller slewing bearing used in this tracked excavator also includes a first sealing strip 8. The top of the first groove 211 is provided with a first opening 10. One end of the first sealing strip 8 is fixedly embedded on the outer ring 2, and the other end of the first sealing strip 8 is mounted on the top of the inner ring 1. After installation, the first sealing strip 8 closes the first opening 10.

[0042] The three-row roller slewing bearing used in this tracked excavator also includes a second sealing strip 9. The bottom of the first groove 211 is provided with a second opening 20, which extends along the gap between the inner ring 1 and the outer ring 2. One end of the second sealing strip 9 is fixedly embedded on the inner ring 1, and the other end of the second sealing strip 9 is mounted on the outer ring 2. The second sealing strip 9, after being installed, closes the second opening 20.

[0043] The outer ring 2 is also provided with oil holes 200. There can be multiple oil holes 200, and all oil holes 200 are connected to the first groove 211 at one end and connected to the outside at the other end.

[0044] The three-row roller slewing bearing used in this tracked excavator also includes a grease nipple 100. The grease nipple 100 is fixedly installed on the outer side wall of the outer ring 2 by threaded connection. There can be multiple grease nipples 100, and their number can be equivalent to the number of oil holes 200. The multiple grease nipples 100 are connected to the multiple oil holes 200 in a one-to-one correspondence.

[0045] The inner ring 1 has a through hole 101 in the middle, and gear teeth 102 are provided on the inner wall of the through hole 101. An external power device can drive the gear teeth 102 to rotate through gear meshing, thereby causing the inner ring 1 to rotate, and the inner ring 1 and outer ring 2 can rotate relative to each other.

[0046] This invention can be used in tracked excavators. The components in the tracked excavator that need to rotate relative to each other can be connected to the inner ring 1 and the outer ring 2 respectively, so that the inner ring 1 and the outer ring 2 can rotate relative to each other, thereby realizing the relative rotation of the above-mentioned components.

[0047] Furthermore, multiple first rollers 3 can form a first roller row, multiple second rollers 4 can form a second roller row, and multiple third rollers 5 can form a third roller row. This means the present invention has three roller rows, providing high load-bearing capacity. Simultaneously, the first rollers 3 and second rollers 4 are arranged parallel to the horizontal plane, and the third rollers 5 are arranged perpendicular to the horizontal plane. Therefore, whether it is radial or axial load, there is a corresponding roller row to bear the primary load, enabling the present invention to better withstand forces transmitted from different directions. This makes the present invention more suitable for different working conditions, especially for the high-load use of tracked excavators. The different dimensions of the first rollers 3, second rollers 4, and third rollers 5 effectively avoid stress concentration during operation, thereby improving the service life of the present invention.

[0048] Furthermore, during the operation of this invention, when the inner ring 1 and the outer ring 2 rotate relative to each other, the first roller 3, the second roller 4, and the third roller 5 roll between the inner ring 1 and the outer ring 2. The grease nipple 100 can be connected to an external oil supply device through a pipe, allowing the external oil supply device to supply lubricating oil into the oil hole 200. The lubricating oil can then enter the first groove 211 and the second groove 212 through the oil hole 200, thereby lubricating the rolling of the first roller 3, the second roller 4, and the third roller 5 and better ensuring the operation of this invention.

[0049] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A three-row roller slewing bearing for a tracked excavator, characterized in that, Including the inner ring, outer ring, first roller, second roller, and third roller. There are multiple first rollers, second rollers, and third rollers. The outer ring includes an upper outer ring and a lower outer ring, which are connected vertically. The outer ring has a central hole, a first groove on the sidewall of the central hole, and a second groove on the sidewall of the first groove. An oil hole is located inside the outer ring and communicates with the first groove. The inner ring is disposed on the central hole, and a protrusion is provided on the outer side of the inner ring, the protrusion extending into the first groove. The first roller is mounted on the top of the protrusion and abuts against the top wall of the first groove. The second roller is mounted on the bottom wall of the first groove and abuts against the bottom of the protrusion. The third roller is located in the second groove and abuts against the side wall of the second groove and the side wall of the protrusion, respectively.

2. The three-row roller slewing bearing for a tracked excavator according to claim 1, characterized in that, The dimensions of the first roller, the second roller, and the third roller decrease sequentially.

3. A three-row roller slewing bearing for a tracked excavator according to claim 2, characterized in that, It includes a first cage and a second cage, the first cage being fitted onto the inner ring, the first roller being embedded in the first cage, the second cage being fitted onto the inner ring, and the second roller being embedded in the second cage.

4. A three-row roller slewing bearing for a tracked excavator according to claim 2, characterized in that, It includes a third retainer, which is sleeved on the protrusion, and the third roller is embedded in the third retainer.

5. A three-row roller slewing bearing for a tracked excavator according to claim 1, characterized in that, Includes a first sealing strip, the top of the first groove is provided with a first opening, one end of the first sealing strip is embedded on the outer ring, and the other end is supported on the inner ring, and the first sealing strip closes the first opening.

6. A three-row roller slewing bearing for a tracked excavator according to claim 1, characterized in that, Includes a second sealing strip, the bottom of the first groove is provided with a second opening, one end of the second sealing strip is embedded on the inner ring, the other end is mounted on the outer ring, and the second sealing strip closes the second opening.

7. A three-row roller slewing bearing for a tracked excavator according to claim 1, characterized in that, It includes an oil nozzle, which is installed on the outer side wall of the outer ring and is connected to an oil hole.

8. A three-row roller slewing bearing for a tracked excavator according to claim 1, characterized in that, The inner ring has a through hole in the middle, and the inner wall of the through hole has gear teeth.

9. A three-row roller slewing bearing for a tracked excavator according to claim 1, characterized in that, The upper outer ring has a protrusion at the bottom and the lower outer ring has a recess at the top, with the protrusion embedded in the recess.

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