Slewing bearing for forestry machinery

Abstract

The utility model discloses a slewing bearing for forestry machinery, which comprises an inner ring, an outer ring, a rolling body, a first sealing strip and a second sealing strip, the center of the outer ring is provided with a first through hole, the inner ring is arranged on the first through hole, the outer ring is connected with the inner ring through the rolling body in a relative rotation manner, and a gap is reserved between the inner ring and the outer ring. The inner ring is provided with an upper protruding part higher than the top of the outer ring, a first mounting groove is formed in the side portion of the upper protruding part, one end of the first sealing strip is embedded in the first mounting groove, the other end of the first sealing strip abuts against the top of the outer ring, the outer ring is provided with a lower protruding part lower than the bottom of the inner ring, and a second mounting groove is formed in the side portion of the lower protruding part. One end of the second sealing strip is embedded in the second mounting groove, the other end of the second sealing strip abuts against the bottom of the inner ring, the first sealing strip covers one end of the gap, the second sealing strip covers the other end of the gap, the inner ring is provided with an oil hole, and the oil hole is communicated with the gap.

Description

Technical Field

[0001] This utility model relates to the field of engineering equipment technology, and in particular to a slewing bearing for forestry machinery. Background Technology

[0002] Forestry machinery is used for afforestation, forest cultivation or protection, logging and transportation, and the production of timber and other forest products. Most forestry machinery uses slewing bearings to facilitate relative rotation between two components within the machine.

[0003] Slewing bearings typically consist of an inner ring, an outer ring, and rolling elements. To reduce the frictional force on the rolling elements during operation, lubricating oil is usually installed inside the slewing bearing. However, in actual use, it has been found that because forestry machinery needs to process large logs, the workload is high, and the internal lubricating oil is consumed very quickly. If it is not replenished in time, the lubrication is prone to failure.

[0004] On the other hand, to prevent lubricating oil leakage, a seal is usually required between the inner and outer rings. However, in actual forestry machinery, there are often slewing bearings that require the use of bearings with significant differences in the size of their inner and outer rings. Conventional sealing methods are often insufficient to guarantee a seal between the inner and outer rings with such a large size difference. Utility Model Content

[0005] The purpose of this utility model is to provide a slewing bearing for forestry machinery that can solve one or more of the above-mentioned problems.

[0006] According to one aspect of this utility model, a slewing bearing for forestry machinery is provided, comprising an inner ring, an outer ring, rolling elements, a first sealing strip, and a second sealing strip.

[0007] The outer ring has a first through hole at its center, and the inner ring is disposed on the first through hole. The outer ring is rotatably connected to the inner ring via a rolling element, and a gap is left between the inner and outer rings.

[0008] The inner ring has an upper protrusion that is higher than the top of the outer ring. A first mounting groove is provided on the side of the upper protrusion. One end of the first sealing strip is embedded in the first mounting groove, and the other end of the first sealing strip abuts against the top of the outer ring.

[0009] The outer ring has a lower protrusion that is lower than the bottom of the inner ring. A second mounting groove is provided on the side of the lower protrusion. One end of the second sealing strip is embedded in the second mounting groove, and the other end of the second sealing strip abuts against the bottom of the inner ring.

[0010] The first sealing strip covers one end of the gap, and the second sealing strip covers the other end of the gap.

[0011] The inner ring is provided with an oil hole, which is connected to the gap.

[0012] The beneficial effects of this utility model are as follows: The first mounting groove facilitates the effective fixing of the first sealing strip to the inner ring, and the upper protrusion provides more space for the first sealing strip to contact the outer ring, thereby ensuring the sealing effect of the first sealing strip. Similarly, the second mounting groove facilitates the effective fixing of the second sealing strip to the outer ring, and the lower protrusion provides more space for the second sealing strip to contact the inner ring, thus ensuring the sealing effect of the second sealing strip. This utility model provides a highly reliable sealing method and is suitable for sealing between inner and outer rings with significant size differences. Furthermore, the oil hole allows for convenient and timely replenishment of lubricating oil when needed.

[0013] In some embodiments, the distance from the first mounting groove to the top of the outer ring is 3mm to 5mm, and the distance from the second mounting groove to the bottom of the inner ring is 3mm to 5mm. These parameters ensure that the first mounting groove has sufficient space for the first sealing strip, but after installation, the first sealing strip is not too far from the top of the outer ring, thus affecting its sealing performance. Similarly, the second mounting groove has sufficient space for the second sealing strip, but after installation, the second sealing strip is not too far from the bottom of the inner ring, thus affecting its sealing performance.

[0014] In some embodiments, the present invention further includes an isolation block, an annular groove is provided on the side wall of the first through hole, a groove is provided on the outer side wall of the inner ring, and there are multiple rolling elements and isolation blocks. One end of the rolling element is embedded in the groove and the other end is embedded in the annular groove, and an isolation block is provided between adjacent rolling elements.

[0015] In some embodiments, the present invention further includes a plug and a locking block. The inner ring has a plugging hole and a locking hole. The plugging hole communicates with the gap and allows the passage of a single rolling element or spacer. The plug is embedded in the plugging hole and closes it. The locking block is embedded in the locking hole and passes through the plug. The plugging hole facilitates the placement of the rolling element or spacer into the gap during assembly. The plug also allows the plug to be closed after the rolling element and spacer are arranged, preventing accidental dislodgement of the rolling element or spacer. The locking block locks the plug after it is installed, preventing accidental dislodgement.

[0016] In some embodiments, the sidewall of the groove has a first recess, and the sidewall of the annular groove has a second recess. The first and second recesses can be used to accommodate lubricating oil to ensure that the rolling element has sufficient lubricating oil in the groove and annular groove during operation.

[0017] In some embodiments, the inner ring is provided with a second through hole, and the oil hole communicates with the second through hole. The second through hole allows sufficient space to be provided for the oil supply hole to communicate with an external oil supply device.

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

[0019] In some embodiments, a gear portion is provided on the outer side wall of the outer ring. The gear portion can mesh with an external gear, so that an external power device can drive the gear portion to rotate, thereby causing the outer ring to rotate accordingly.

[0020] In some embodiments, the height of the lower protrusion is greater than 70 mm. Under the above parameters, the lower protrusion has sufficient dimensions to allow the external structure to extend into it, thus providing a certain degree of restraint on the extended portion of the external structure.

[0021] In some embodiments, the inner ring is provided with a first mounting hole, and the outer ring is provided with a second mounting hole, wherein the first mounting hole is arranged parallel to the central axis of the inner ring, and the second mounting hole is arranged parallel to the central axis of the outer ring. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a slewing bearing for forestry machinery according to one embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of a slewing bearing for forestry machinery without an inner ring, according to one embodiment of this utility model.

[0024] Figure 3 This is a structural schematic diagram of a slewing bearing for forestry machinery according to one embodiment of the present invention, shown in cross-sectional view at the oil hole.

[0025] Figure 4 This is a schematic diagram of the outer ring structure of a slewing bearing for forestry machinery according to one embodiment of the present invention, shown in cross-sectional view at the oil hole.

[0026] Figure 5 This is a schematic diagram of the inner ring structure of a slewing bearing for forestry machinery according to one embodiment of the present invention, shown in cross-sectional view at the oil hole.

[0027] In the diagram: 1. Inner ring, 2. Outer ring, 3. Rolling element, 4. First sealing strip, 5. Second sealing strip, 6. Oil nozzle, 7. Isolating block, 8. Blocking block, 9. Locking block, 10. Gap, 21. First through hole, 211. Annular groove, 2111. Second recess, 11. Groove, 12. Upper protrusion, 13. First mounting groove, 111. First recess, 14. Second through hole, 15. Oil hole, 16. First mounting hole, 17. Blocking hole, 18. Locking hole, 210. Lower protrusion, 22. Second mounting groove, 23. Second mounting hole, 24. Gear section. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention relates to a slewing bearing for forestry machinery, comprising an inner ring 1, an outer ring 2, a rolling element 3, a first sealing strip 4, and a second sealing strip 5.

[0030] The outer ring 2 has a first through hole 21 at its center, and the inner ring 1 is disposed on the first through hole 21.

[0031] The first through hole 21 has an annular groove 211 on its side wall, and the inner ring 1 has a groove 11 on its outer side wall. The rolling element 3 is preferably a ball bearing, and there can be multiple rolling elements 3. The slewing bearing for this forestry machinery also includes multiple isolation blocks 7, the number of which matches the number of rolling elements 3. One end of all rolling elements 3 is embedded in the groove 11, and the other end of all rolling elements 3 is embedded in the annular groove 211. The rolled elements 3 can rotate and roll along the groove 11 and the annular groove 211. Isolation blocks 7 are provided between adjacent rolling elements 3, allowing the outer ring 2 to be rotatably connected to the inner ring 1 via the rolling elements 3. A gap 10 is left between the inner ring 1 and the outer ring 2 after the installation.

[0032] This utility model may also include a plug 8. The inner sidewall of the inner ring 1 is also provided with a plug hole 17. The plug hole 17 is connected to the gap 10 and the plug hole 17 can allow a single rolling element 3 or a spacer block 7 to pass through. When the rolling element 3 and the spacer block 7 are assembled, they can pass through the plug hole 17 and be fed into the gap 10 until the gap 10 can no longer be filled. After the rolling element 3 and the spacer block 7 are assembled, the plug 8 can be embedded in the plug hole 17 and seal the plug hole 17 to prevent the rolling element 3 or the spacer block 7 from accidentally coming out.

[0033] This utility model may also include a locking block 9, and the inner ring 1 is also provided with a locking hole 18. The locking hole 18 can be set on the surface of the inner ring 1 and is set perpendicular to the blocking hole 17. After the blocking block 8 is set on the blocking hole 17, the locking block 9 can be embedded in the locking hole 18 and pass through the blocking block 8 to lock the blocking block 8 and prevent the blocking block 8 from accidentally coming off the inner ring 1. The locking block 9 itself can be set perpendicular to the horizontal plane and rely on gravity to prevent it from accidentally coming off the inner ring 1.

[0034] The inner ring 1 has an upper protrusion 12 that is higher than the top of the outer ring 2. The side of the upper protrusion 12 has a first mounting groove 13. One end of the first sealing strip 4 is fixedly embedded in the first mounting groove 13, and the other end of the first sealing strip 4 abuts against the top of the outer ring 2, so that the first sealing strip 4 covers one end of the gap 10.

[0035] The outer ring 2 has a lower protrusion 210 that is lower than the bottom of the inner ring 1. A second mounting groove 22 is provided on the side of the lower protrusion 210. One end of the second sealing strip 5 is fixedly embedded in the second mounting groove 22, and the other end of the second sealing strip 5 abuts against the bottom of the inner ring 1, so that the second sealing strip 5 covers the other end of the gap 10. In addition, the height of the lower protrusion 210 can be greater than 70mm to ensure that the lower protrusion 210 has sufficient length to limit the external structure provided in the first through hole 21.

[0036] The distance from the first mounting groove 13 to the top of the outer ring 2 should be between 3mm and 5mm to effectively limit the installation height of the first sealing strip 4. The distance from the second mounting groove 22 to the bottom of the inner ring 1 should be between 3mm and 5mm to effectively limit the installation height of the second sealing strip 5. In this embodiment, the distance from the first mounting groove 13 to the top of the outer ring 2 is preferably 4mm, and the distance from the second mounting groove 22 to the bottom of the inner ring 1 is preferably 4mm.

[0037] The side wall of the groove 11 is provided with a first recess 111, and the side wall of the annular groove 211 is provided with a second recess 2111. Both the first recess 111 and the second recess 2111 can accommodate lubricating oil.

[0038] The inner ring 1 has a second through hole 14 at its center and an oil hole 15 inside the inner ring 1. One end of the oil hole 15 is connected to the first recess 111, that is, the end is connected to the gap 10 through the groove 11. The other end of the oil hole 15 is connected to the second through hole 14.

[0039] The slewing bearing for this forestry machinery also includes an oil nozzle 6, which is fixedly installed on the side wall of the second through hole 14 by a threaded connection, and the oil nozzle 6 is connected to the oil hole 15, that is, the oil hole 15 can be connected to the second through hole 14 through the oil nozzle 6.

[0040] The top of the inner ring 1 is provided with a plurality of first mounting holes 16, all of which are arranged in parallel and are parallel to the central axis of the inner ring 1.

[0041] The top of the outer ring 2 is provided with a plurality of second mounting holes 23, all of which are arranged in parallel and are parallel to the central axis of the outer ring 2. The outer side wall of the outer ring 2 is also provided with a gear part 24.

[0042] This invention can be used in the rotating structure of forestry machinery. The two components to be rotated relative to each other can be connected to the first mounting hole 16 and the second mounting hole 23 respectively by bolts, so that the two components to be rotated relative to each other can be fixedly connected to the inner ring 1 and the outer ring 2 respectively. Moreover, the external power device can drive the outer ring 2 to rotate by meshing with the gear part 24, so that the inner ring 1 and the outer ring 2 rotate relative to each other, thereby enabling the rotating structure of the above-mentioned forestry machinery to realize the rotation action.

[0043] When it is necessary to input lubricating oil into this utility model, the external lubricating oil supply device can deliver lubricating oil to the oil hole 15 through the oil nozzle 6 to avoid insufficient lubricating oil and improve the working reliability of this utility model.

[0044] Furthermore, in the aforementioned arrangement of the first sealing strip 4 and the second sealing strip 5, each end is fixed to the inner ring 1 or the outer ring 2 at one end, while the other end is correspondingly abutted, i.e., not completely fixed, onto the outer ring 2 or the inner ring 1. This effectively prevents the first sealing strip 4 or the second sealing strip 5 from obstructing the relative rotation of the inner ring 1 and the outer ring 2. Simultaneously, the first sealing strip 4 and the second sealing strip 5 abut against the top of the outer ring 2 and the bottom of the inner ring 1, respectively, ensuring sufficient contact with both rings and effectively guaranteeing the sealing of the gap 10. This significantly reduces the probability of lubricating oil leakage from this invention.

[0045] 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 slewing bearing for forestry machinery, characterized in that, Includes an inner ring, an outer ring, rolling elements, a first sealing strip, and a second sealing strip. The outer ring has a first through hole at its center, and the inner ring is disposed on the first through hole. The outer ring is rotatably connected to the inner ring via a rolling element, and a gap is left between the inner and outer rings. The inner ring has an upper protrusion that is higher than the top of the outer ring. A first mounting groove is provided on the side of the upper protrusion. One end of the first sealing strip is embedded in the first mounting groove, and the other end of the first sealing strip abuts against the top of the outer ring. The outer ring has a lower protrusion that is lower than the bottom of the inner ring. A second mounting groove is provided on the side of the lower protrusion. One end of the second sealing strip is embedded in the second mounting groove, and the other end of the second sealing strip abuts against the bottom of the inner ring. The first sealing strip covers one end of the gap, and the second sealing strip covers the other end of the gap. The inner ring is provided with an oil hole, which is connected to the gap.

2. A slewing bearing for forestry machinery according to claim 1, characterized in that, The distance from the first mounting groove to the top of the outer ring is 3mm to 5mm, and the distance from the second mounting groove to the bottom of the inner ring is 3mm to 5mm.

3. A slewing bearing for forestry machinery according to claim 1, characterized in that, The device includes an isolation block, an annular groove on the side wall of the first through hole, a groove on the outer side wall of the inner ring, multiple rolling elements and isolation blocks, one end of each rolling element being embedded in the groove and the other end being embedded in the annular groove, and isolation blocks being provided between adjacent rolling elements.

4. A slewing bearing for forestry machinery according to claim 3, characterized in that, It includes a plug and a locking block. The inner ring is provided with a plugging hole and a locking hole. The plugging hole is connected to the gap and allows a single rolling element or isolation block to pass through. The plug is embedded in the plugging hole and closes the plugging hole. The locking block is embedded in the locking hole and passes through the plug.

5. A slewing bearing for forestry machinery according to claim 3, characterized in that, The sidewall of the groove has a first recess, and the sidewall of the annular groove has a second recess.

6. A slewing bearing for forestry machinery according to claim 1, characterized in that, The inner ring is provided with a second through hole, and the oil hole is connected to the second through hole.

7. A slewing bearing for forestry machinery according to claim 6, characterized in that, It includes an oil nozzle, which is installed on the side wall of the second through hole and is connected to the oil hole.

8. A slewing bearing for forestry machinery according to claim 1, characterized in that, The outer wall of the outer ring is provided with a gear section.

9. A slewing bearing for forestry machinery according to claim 1, characterized in that, The height of the lower protrusion is greater than 70mm.

10. A slewing bearing for forestry machinery according to claim 1, characterized in that, The inner ring has a first mounting hole, and the outer ring has a second mounting hole. The first mounting hole is parallel to the central axis of the inner ring, and the second mounting hole is parallel to the central axis of the outer ring.

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