Double-row ball type slewing bearing

Abstract

The utility model discloses a double-row ball type slewing bearing which comprises an inner ring, a first outer ring and a second outer ring, two symmetrical first ring grooves are formed in the outer wall of the inner ring, second ring grooves are formed in the outer edges of the first outer ring and the second outer ring, and a plurality of oil injection holes are formed in the upper end face of the first outer ring and are evenly distributed along the axis of the inner ring. Through the use of the multiple oil injection holes, oil can be injected into the slewing bearing, it is guaranteed that in the using process of the slewing bearing, sufficient lubrication is achieved, friction force is reduced, the two clamping blocks can be in butt joint with the oil injection holes through the corresponding clamping grooves in cooperation with the use of the sealing blocks and the clamping blocks, and therefore the oil injection efficiency of the slewing bearing is improved. The sealing block is prevented from loosening through rotation of the sealing block, the sealing block is prevented from rotating at will through cooperation of a sealing cover and two clamping strips, the sealing block is fixed through use of a first fixing bolt, sufficient sealing of the oil injection hole is guaranteed, and dust and impurities are prevented from entering the oil injection hole.

Description

Technical Field

[0001] This utility model relates to the field of slewing bearing technology, specifically a double-row ball slewing bearing. Background Technology

[0002] A slewing bearing is a large bearing capable of withstanding combined loads, including large axial forces, radial forces, and overturning moments. Slewing bearings typically consist of an inner ring, an outer ring, rolling elements (such as balls and rollers), and spacers. The inner and outer rings have mounting holes for connecting to the stationary and rotating parts of the equipment.

[0003] In existing slewing bearings, lubricating oil is typically added to the lubrication port during use to ensure normal operation, reduce friction, and extend service life. However, in actual use, impurities and dust can easily enter the lubrication port, causing lubricating oil contamination. Long-term accumulation of dust and impurities can affect the rotation of the balls or rollers, resulting in greater friction and severe wear of the slewing bearing. This ultimately affects the normal use of the slewing bearing, leading to poor performance in actual applications. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a double-row ball slewing bearing that solves the problem of impurities and dust easily entering the oil injection hole, leading to long-term dust accumulation, increased internal friction of the slewing bearing, wear on the balls or rollers, and thus affecting the operation of the slewing bearing and reducing its service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-row ball slewing bearing, comprising an inner ring, a first outer ring, and a second outer ring. Two symmetrical first annular grooves are formed on the outer wall of the inner ring. Second annular grooves are formed along the outer edges of both the first and second outer rings. Multiple oil injection holes are formed on the upper surface of the first outer ring, evenly distributed around the axis of the inner ring. A through groove is formed on the bottom wall of each oil injection hole, communicating with the first annular grooves. Two retaining grooves and a rotating groove are formed on the inner wall of each oil injection hole. A sealing block is movably connected to the bottom wall of the oil injection hole. Two symmetrical retaining blocks are fixedly connected to the outer edge of the sealing block. A connecting column is fixedly connected to the upper surface of the sealing block. Two symmetrical retaining strips are movably connected within the retaining grooves. A sealing cover is fixedly connected between the two retaining strips. The sealing cover is fixedly connected to the connecting column by a first fixing bolt. An anti-rotation block is movably connected within the anti-rotation groove, and the anti-rotation block is fixedly connected to the sealing cover.

[0006] The beneficial effects of this utility model are as follows: By using multiple oil injection holes, the slewing bearing can be oiled, ensuring sufficient lubrication during use and reducing friction. With the use of sealing blocks and locking blocks, the two locking blocks can be connected to the oil injection holes through their respective locking grooves. The rotation of the sealing block prevents it from loosening. With the use of the sealing cover and two locking strips, the sealing block is prevented from rotating arbitrarily. The sealing block is fixed by the use of the first fixing bolt, ensuring sufficient sealing of the oil injection hole and preventing dust and impurities from entering.

[0007] In order to achieve fixation between the first outer ring and the second outer ring;

[0008] As a further improvement to the above technical solution: the upper end face of the first outer ring is provided with a plurality of retaining holes, the retaining holes extending into the second outer edge, and the first outer ring and the second outer ring are fixedly connected by a second fixing bolt;

[0009] The beneficial effects of this improvement are: by using the fixing hole and the second fixing bolt, the first outer ring and the second outer ring can be fixed together, ensuring the stability of the connection between the first outer ring and the second outer ring and preventing the problem of falling off and shaking.

[0010] In order to achieve the tightening of the first fixing bolt;

[0011] As a further improvement to the above technical solution: a cross groove is provided on the upper end face of the first fixing bolt;

[0012] The beneficial effects of this improvement are: by using the cross groove, the first fixing bolt can be turned, which facilitates the installation and fixing of the first fixing bolt and makes it easier for the staff to operate.

[0013] To allow rotation of the second fixing bolt for easier installation and disassembly;

[0014] As a further improvement to the above technical solution: a square hole is provided on the upper end face of the second fixing bolt;

[0015] The beneficial effects of this improvement are: by using the square hole, a suitable tool can be used to rotate the second fixing bolt, which facilitates the twisting of the second fixing bolt and makes it convenient to install, fix or disassemble the second fixing bolt.

[0016] In order to fix the inner ring;

[0017] As a further improvement to the above technical solution: the inner ring is provided with a plurality of first mounting holes, and the plurality of first mounting holes are evenly distributed around the axis of the inner ring;

[0018] The beneficial effects of this improvement are: by using the first mounting hole, the inner ring can be fixed, connecting the inner ring to the equipment and ensuring sufficient stability of the inner ring during operation.

[0019] In order to fix the first outer ring and the second outer ring;

[0020] As a further improvement to the above technical solution: both the upper end face of the first outer ring and the lower pad surface of the second outer ring are provided with a plurality of second mounting holes, and the plurality of second mounting holes are evenly distributed around the axis of the inner ring;

[0021] The beneficial effects of this improvement are: by using the second mounting hole, the outer ring can be connected and fixed to the equipment, ensuring that the first and second outer rings remain sufficiently stable during use and will not tilt or shake.

[0022] In order to achieve driving of the inner circle;

[0023] As a further improvement to the above technical solution: a plurality of evenly distributed teeth are fixedly connected to the inner wall of the inner ring;

[0024] The beneficial effects of this improvement are: by using teeth, the inner ring can be driven, making it easier to rotate the inner ring and ensuring the normal operation of the slewing bearing.

[0025] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0026] Figure 1 Schematic diagram of the three-dimensional structure provided by this utility model Figure 1 ;

[0027] Figure 2 Top view provided for this utility model;

[0028] Figure 3 Provided by this utility model Figure 2 A three-dimensional cross-sectional view at point AA;

[0029] Figure 4 Provided by this utility model Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 Schematic diagram of the three-dimensional structure provided by this utility model Figure 2 .

[0031] In the diagram, 1 is the inner ring; 2 is the first outer ring; 3 is the second outer ring; 11 is the first annular groove; 12 is the second annular groove; 13 is the oil injection hole; 14 is the through groove; 15 is the retaining groove; 16 is the rotating groove; 17 is the sealing block; 18 is the retaining block; 19 is the connecting column; 20 is the retaining strip; 21 is the sealing cap; 22 is the first fixing bolt; 23 is the anti-rotation groove; 24 is the anti-rotation block; 31 is the retaining hole; 32 is the second fixing bolt; 41 is the cross groove; 51 is the square hole; 61 is the first mounting hole; 71 is the second mounting hole; and 81 is the tooth. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0033] like Figures 1 to 5As shown in the figure, this utility model provides a double-row ball slewing bearing, including an inner ring 1, a first outer ring 2, and a second outer ring 3. Two symmetrical first annular grooves 11 are formed on the outer wall of the inner ring 1. Second annular grooves 12 are formed on the outer edges of both the first outer ring 2 and the second outer ring 3. Multiple oil injection holes 13 are formed on the upper surface of the first outer ring 2. Through the use of these multiple oil injection holes 13, lubricating oil can be added to the slewing bearing to ensure its normal operation and reduce friction. The multiple oil injection holes 13 are evenly distributed around the axis of the inner ring 1. A through groove 14 is formed on the inner bottom wall of each oil injection hole 13, communicating with the first annular grooves 11. Two retaining grooves 15 and a rotating groove 16 are respectively formed on the inner wall of each oil injection hole 13. A sealing block 17 is movably connected to the inner bottom wall of each oil injection hole 13. Two symmetrical locking blocks 18 are fixedly connected to the outer edge of the sealing block 17. A connecting post 19 is fixedly connected to the upper end face of the sealing block 17. Two symmetrical locking strips 20 are movably connected in the slot 15. A sealing cover 21 is fixedly connected between the two locking strips 20. The sealing cover 21 is fixedly connected to the connecting post 19 by a first fixing bolt 22. With the use of the sealing block, the through groove 14 can be sealed. The use of the two locking blocks 18 makes the sealing block 17 stably fit against the inner wall of the oil injection hole 13. The sealing cover 21, with the two locking strips 20, mates with the slot 15 to ensure the stability of the sealing cover 21. An anti-rotation groove 23 is opened on the upper end face of the connecting post 19. An anti-rotation block 24 is movably connected in the anti-rotation groove 23. The anti-rotation block 24 is fixedly connected to the sealing cover 21 to prevent rotation. Block 24 mates with anti-rotation groove 23 to ensure the stability of sealing block 17 and prevent sealing block 17 from rotating arbitrarily during the twisting of the first fixing bolt 22, ensuring sufficient stability of sealing block 17. Multiple retaining holes 31 are provided on the upper end face of the first outer ring 2, extending into the second outer edge. The first outer ring 2 and the second outer ring 3 are fixedly connected by the second fixing bolt 32. The multiple retaining holes 31 and their corresponding second fixing bolts 32 can fix the first outer ring 2 and the second outer ring 3, ensuring the stability of the connection between them. A cross groove 41 is provided on the upper end face of the first fixing bolt 22, and a square hole 51 is provided on the upper end face of the second fixing bolt 32. The cross groove 41 can be used to fix the first fixing bolt 22. The bolt 22 is turned, and the square hole 51 allows for the use of a suitable tool to turn the second fixing bolt 32, facilitating operation and easy tightening and loosening of the first fixing bolt 22 and the second fixing bolt 32. Multiple first mounting holes 61 are evenly distributed around the axis of the inner ring 1 on the inner ring 1. Multiple second mounting holes 71 are evenly distributed around the axis of the inner ring 1 on the upper end face of the first outer ring 2 and the lower pad surface of the second outer ring 3. The use of multiple first mounting holes 61 and multiple second mounting holes 71 allows for the separate fixing of the inner ring 1, the first outer ring 2, and the second outer ring 3 to the equipment, ensuring sufficient stability of the slewing bearing during use and preventing swaying or shaking.Multiple evenly distributed teeth 81 are fixedly connected to the inner wall of the inner ring 1. The use of teeth 81 facilitates the gear's drive of the inner ring 1, ensuring the stable operation of the slewing bearing.

[0034] The working principle and usage process of this utility model are as follows: First, the first outer ring 2 and the second outer ring 3 are connected to the inner ring 1, and with the use of two second fixing bolts 32, the first outer ring 2 and the second outer ring 3 are connected to the inner ring 1. The inner ring 1 is then fixed to the equipment using multiple mounting holes 71. The equipment is secured using the second mounting holes 71 on the first outer ring 2 and the second outer ring 3 to ensure stability. Lubricating oil is added to the slewing bearing through the oil injection hole 13. After adding oil, the two bolts on the outer edge of the sealing block 17 are used to... The locking block 18 aligns with the two locking grooves 15 on the inner wall of the oil injection hole 13. By rotating the connecting column 19, the sealing block 17 rotates 90 degrees, and then the two locking strips 20 on the sealing cover 21 align with the locking grooves 15. The anti-rotation block 24 on the lower end face of the sealing cover 21 aligns with the anti-rotation groove 23 on the upper end face of the connecting column 19 to prevent the sealing block 17 from rotating arbitrarily. The fixing cover is fixed by the use of the first fixing bolt 22 to ensure sufficient sealing of the oil injection hole 13, thereby realizing the use process of the double row ball slewing bearing.

[0035] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-volley ball slewing bearing, comprising an inner ring (1), a first outer ring (2), and a second outer ring (3), characterized in that: The inner ring (1) has two symmetrical first annular grooves (11) on its outer wall. The outer edges of the first outer ring (2) and the second outer ring (3) are provided with second annular grooves (12). The upper end face of the first outer ring (2) is provided with a plurality of oil injection holes (13). The plurality of oil injection holes (13) are evenly distributed around the axis of the inner ring (1). A through groove (14) is provided on the inner bottom wall of the oil injection hole (13), the through groove (14) is connected to the first annular groove (11), two slots (15) and a rotating groove (16) are respectively provided on the inner wall of the oil injection hole (13), a sealing block (17) is movably connected to the inner bottom wall of the oil injection hole (13), two symmetrically opposite locking blocks (18) are fixedly connected to the outer edge of the sealing block (17), and a connecting post (19) is fixedly connected to the upper end face of the sealing block (17). Two symmetrical locking strips (20) are movably connected in the slot (15). A sealing cover (21) is fixedly connected between the two locking strips (20). The sealing cover (21) is fixedly connected to the connecting column (19) by a first fixing bolt (22). An anti-rotation groove (23) is provided on the upper end face of the connecting column (19). An anti-rotation block (24) is movably connected in the anti-rotation groove (23). The anti-rotation block (24) is fixedly connected to the sealing cover (21).

2. The double-ball slewing bearing according to claim 1, characterized in that: The upper end face of the first outer ring (2) is provided with a plurality of fixing holes (31), the fixing holes (31) extend into the second outer edge, and the first outer ring (2) and the second outer ring (3) are fixedly connected by a second fixing bolt (32).

3. A double-row ball slewing bearing according to claim 1, characterized in that: The upper end face of the first fixing bolt (22) is provided with a cross groove (41).

4. A double-row ball slewing bearing according to claim 2, characterized in that: The second fixing bolt (32) has a square hole (51) on its upper end face.

5. A double-row ball slewing bearing according to claim 1, characterized in that: The inner ring (1) is provided with a plurality of first mounting holes (61), which are evenly distributed around the axis of the inner ring (1).

6. A double-row ball slewing bearing according to claim 1, characterized in that: The upper end face of the first outer ring (2) and the lower pad face of the second outer ring (3) are provided with a plurality of second mounting holes (71), and the plurality of second mounting holes (71) are evenly distributed around the axis of the inner ring (1).

7. A double-row ball slewing bearing according to claim 1, characterized in that: The inner ring (1) has a number of evenly distributed teeth (81) fixedly connected to its inner wall.

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