CN216922886U - Three-row roller type rotary support bearing - Google Patents

Abstract

The application relates to a three-row roller type slewing bearing, it relates to the slewing bearing field, and it includes outer lane, interior upper ring and interior lower circle, interior upper ring with interior lower circle is equal coaxial setting inside the outer lane, interior upper ring the bottom surface with interior lower circle laminating still including being used for the shutoff the outer lane with interior upper ring between the gap last seal assembly with be used for the bearing by the outer lane with interior lower seal assembly of lubricant between the lower circle. This application has and avoids the foreign matter to enter into in the effect of going up between circle, interior lower circle and the outer lane and pile up, is favorable to prolonging three rows of roller slewing bearing life.

Description

Three-row roller type rotary support bearing

Technical Field

The application relates to the field of slewing bearing, in particular to a three-row roller type slewing bearing.

Background

The three-row roller slewing bearing is composed of an outer ring, an inner upper ring, an inner lower ring and the like, wherein the inner upper ring and the inner lower ring are coaxially arranged inside the outer ring, the inner upper ring is attached to the inner lower ring, and the three-row roller slewing bearing is widely applied to industries such as ship equipment, engineering machinery, light industry machinery, metallurgical machinery, medical machinery and industrial machinery.

In the related art, according to the structural characteristics of the three-row roller slewing bearing, the axially inner upper ring of the three-row roller slewing bearing is a main roller path and bears the maximum axial load and overturning moment, and in order to reduce the friction among the inner upper ring, the inner lower ring and the outer ring when the three-row roller slewing bearing works, lubricating grease needs to be filled among the inner upper ring, the inner lower ring and the outer ring, so that a main sealing element for sealing a gap between the inner upper ring and the outer ring and a secondary sealing element for sealing a gap between the inner lower ring and the outer ring are arranged on the outer ring.

In the more abominable occasion of operational environment, like under many dusts and the environment that has great solid particle impact, traditional individual layer sealing member is strikeed destruction by the foreign matter easily, also can not the separation fine solid particle such as dust simultaneously get into interior upper ring, between interior lower ring and the outer lane, it gets into interior upper ring to have a large amount of foreign matters for a long time under this kind of operating condition, in between interior lower ring and the outer lane and pile up, cause with interior upper ring, the wearing and tearing between interior lower ring and the outer lane, shorten three rows of roller slewing bearing's life.

SUMMERY OF THE UTILITY MODEL

In order to improve the foreign matter and get into between interior upper ring, interior lower ring and the outer lane and pile up and lead to the low problem of three rows of roller slewing bearing life, this application provides three rows of roller slewing bearing.

The application provides a three row roller slewing bearing adopts following technical scheme:

the utility model provides a three rows of roller slewing bearing, includes outer lane, interior upper ring and interior lower circle, interior upper ring with interior lower circle is equal coaxial setting in inside the outer lane, the bottom surface of interior upper ring with interior lower circle laminating, still including being used for the shutoff the outer lane with interior upper ring between the gap last seal assembly with be used for the bearing by the outer lane with interior lower seal assembly of lubricant between the lower circle.

By adopting the technical scheme, the gap between the outer ring and the inner upper ring is blocked by the upper sealing assembly, so that when the slewing bearing works in an environment where dust and large solid particle impact exist, fine solid particles such as dust and the like are prevented from entering the space between the outer ring, the inner upper ring and the inner lower ring to aggravate the abrasion among the outer ring, the inner upper ring and the inner lower ring, and further the service life of the slewing bearing is influenced; utilize lower seal assembly to carry out the shutoff to gap between outer lane and the interior lower lane, make when working under the environment that dust and the great solid particle of existence strike, avoid tiny solid particles such as dust to get into the outer lane as far as possible, aggravate the outer lane between interior upper ring and the interior lower lane, interior upper ring and interior lower inter-annular wearing and tearing, and then influence slewing bearing's life, and utilize lower seal assembly to carry out the shutoff to decurrent emollient, reduce the volume in gap between outer lane and the interior lower lane, and then be favorable to keeping good lubricated state, reduce the dry friction between outer lane and the interior lower lane, be favorable to prolonging slewing bearing's life.

In a specific practical implementation scheme, the upper sealing assembly comprises a first sealing strip and a second sealing strip, one side of the first sealing strip is connected with the outer ring in an inserted manner, the other side of the first sealing strip is connected with the inner upper ring in an abutted manner, one side of the second sealing strip is connected with the inner upper ring in an inserted manner, the other side of the second sealing strip is connected with the outer ring in an abutted manner, the second sealing strip is arranged on the first sealing strip away from one side of the inner upper ring, and the first sealing strip is arranged on the second sealing strip and the outer ring is arranged coaxially with the inner upper ring.

Through adopting above-mentioned technical scheme, when carrying out the shutoff to the gap between outer lane and the interior circle of going up, utilize first sealing strip to carry out preliminary shutoff to the gap between outer lane and the interior circle of going up, utilize the second sealing strip to carry out the shutoff to the gap between first sealing strip and the interior circle of going up, avoid dust and foreign matter to get into the outer lane through the gap between first sealing strip and the interior circle of going up, between interior circle of going up and the interior circle of going down, and then the interior circle of going up of aggravation, interior circle of going up and the wearing and tearing between the outer lane down, shorten slewing bearing's life-span.

In a specific practical implementation scheme, the first sealing strip is far away from the outer ring and is equipped with a plurality of first pulling blocks on the lateral wall in the gap between the inner ring and the upper ring, and is a plurality of the first pulling blocks are followed the circumference evenly distributed of first sealing strip, the second sealing strip is far away from the outer ring with fixed connection is equipped with a plurality of second pulling blocks on the lateral wall in the gap between the inner ring and the upper ring, and is a plurality of the second pulling blocks are followed the circumference evenly distributed of second sealing strip.

By adopting the technical scheme, when the lubricant is added among the outer ring, the inner upper ring and the inner lower ring, the second sealing strip is firstly pulled open by the second pulling block, and then the first sealing strip is pulled open by the first pulling block; utilize along interior upper ring circumference evenly distributed's a plurality of first draw the piece and a plurality of second draw the piece for the personnel's operation of being convenient for when adding emollient to the position of difference between outer circle and the interior upper ring realizes good interpolation emollient effect.

In a specific possible implementation manner, the lower sealing assembly includes a lower sealing strip and a plurality of pressing pieces, one side of the lower sealing strip is inserted into the peripheral wall of the outer ring facing the inner lower ring, the peripheral wall of the inner lower ring facing the outer ring is provided with an installation groove, the other side of the lower sealing strip is inserted into the installation groove, the plurality of pressing pieces are uniformly distributed along the circumferential direction of the outer ring, and the pressing pieces are used for pressing the lower sealing strip against the groove wall of the installation groove.

By adopting the technical scheme, when the gap between the outer ring and the inner lower ring is blocked, the lower sealing strip is tightly abutted on the groove wall of the mounting groove by utilizing the abutting parts which are uniformly distributed along the circumferential direction of the outer ring, the stress is uniform, the positioning of two sides of the lower sealing strip is realized, the blocking between the outer ring and the inner lower ring is further realized, and dust and particles which are raised during working are prevented from entering the gap between the outer ring and the inner lower ring from the gap between the lower sealing strip and the inner lower ring as much as possible, so that the abrasion between the outer ring and the inner lower ring is increased, and the service life of the slewing bearing is further shortened.

In a specific possible implementation manner, the pressing part includes a pressing arc plate and a spring, one side of the pressing arc plate abuts against the side wall of the lower seal strip away from the groove wall of the mounting groove, the other side of the pressing arc plate is fixedly connected with the spring, and one end of the spring away from the pressing arc plate is fixedly connected with the side wall of the mounting groove away from the lower seal strip.

Through adopting the above technical scheme, when installing one side of lower seal strip in the mounting groove, at first stir and support and press the arc board, spring compression this moment, then fill in the cell wall of mounting groove and support and press between the lateral wall of arc board with one side of lower seal strip, loosen and support and press the arc board, support and press the arc board to the direction motion that is close to the mounting groove cell wall under the spring action of spring, support tightly with the cell wall of one side of lower seal strip and mounting groove then, realized keeping away from the location of one side of outer lane with the lower seal strip, and is simple in operation, be convenient for realize good shutoff effect to the gap between outer lane and the interior lower lane.

In a specific possible embodiment, a plurality of balls are rotatably arranged between the pressing arc plate and the lower sealing strip.

Through adopting above-mentioned technical scheme, when slewing bearing moved, relative motion took place between outer lane and the interior lower lane, and at this moment, the outer lane drove the lower seal strip and slides in the mounting groove, and the lower seal strip takes place relative sliding with supporting between the pressure arc board, utilizes a plurality of balls to reduce to support and presses the arc board and the frictional force between the lower seal, does not influence the mutual motion between outer lane and the interior lower lane when being favorable to realizing good shutoff effect.

In a specific possible embodiment, a blocking block for blocking a gap between the outer ring and the inner lower ring is arranged on a side wall of the lower sealing strip facing the inner upper ring.

Through adopting above-mentioned technical scheme, utilize the shutoff piece to reduce the volume in gap between outer lane and the interior lower lane, be favorable to realizing the high-efficient utilization of emollient for emollient is restricted in the gap between outer lane and the interior lower lane, has realized good lubricated effect.

In a specific possible embodiment, a plurality of diversion grooves for diverting the lubricant between the outer ring and the inner lower ring are arranged on the side wall of the blocking block facing the inner lower ring.

Through adopting above-mentioned technical scheme, utilize a plurality of guiding gutters to make when changing the bottom entry strip, at first utilize the guiding gutter to empty out the emollient between outer lane and the interior bottom entry, pull down the bottom entry strip again, the clearance of being convenient for realizes good change clearance effect.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when a gap between the outer ring and the inner upper ring is plugged, the first sealing strip is used for primarily plugging the gap between the outer ring and the inner upper ring, the second sealing strip is used for plugging the gap between the first sealing strip and the inner upper ring, dust and foreign matters are prevented from entering the gap between the outer ring, the inner upper ring and the inner lower ring through the gap between the first sealing strip and the inner upper ring as much as possible, so that the abrasion among the inner upper ring, the inner lower ring and the outer ring is aggravated, and the service life of the slewing bearing is shortened;

2. when the gap between the outer ring and the inner lower ring is plugged, the lower sealing strip is tightly abutted to the groove wall of the mounting groove by utilizing the abutting parts uniformly distributed along the circumferential direction of the outer ring, and the stress is uniform, so that the positioning of two sides of the lower sealing strip is realized, further, the plugging between the outer ring and the inner lower ring is realized, and the situation that dust and particles raised during working enter the gap between the outer ring and the inner lower ring from the gap between the lower sealing strip and the inner lower ring is avoided as much as possible, so that the abrasion between the outer ring and the inner lower ring is increased, and the service life of the slewing bearing is shortened.

Drawings

Fig. 1 is a schematic view of the overall structure of a three-row roller-type slewing bearing in the embodiment of the present application.

Fig. 2 is a cross-sectional view taken along the plane a-a in fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view at B in fig. 2.

Description of reference numerals: 1. an outer ring; 2. an inner upper ring; 3. an inner lower ring; 4. an upper seal assembly; 41. a first seal strip; 42. a second seal strip; 5. a lower seal assembly; 51. a lower sealing strip; 52. a pressing member; 521. pressing the arc plate; 522. a spring; 6. a first insertion groove; 7. a second insertion groove; 8. an accommodating space; 9. a first pull block; 10. a second pull block; 11. a slot; 12. mounting grooves; 13. a ball bearing; 14. a plugging block; 15. and a diversion trench.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses three rows of roller type slewing bearing. Referring to fig. 1 and 2, the three-row roller slewing bearing comprises an outer ring 1, an inner upper ring 2 and an inner lower ring 3, a plurality of outer gear teeth are arranged on the outer peripheral wall of the outer ring 1, the inner upper ring 2 is coaxially and fixedly connected with the inner lower ring 3, the bottom wall of the inner upper ring 2 is attached to the top wall of the inner lower ring 3, the inner upper ring 2 and the inner lower ring 3 are coaxially arranged inside the outer ring 1, an upper sealing component 4 for plugging a gap between the outer ring 1 and the side wall of the inner upper ring 2 is arranged between the outer ring 1 and the inner upper ring 2, a lower sealing component 5 for plugging a gap between the inner lower ring 3 is arranged between the outer ring 1 and the inner lower ring 3, when the device works in an environment with dust and larger solid particle impact, the gap between the outer ring 1 and the side wall of the inner upper ring 2 is shielded by the upper sealing component 4, so that fine solid particles such as dust and the like are prevented from entering between the outer ring 1 and the inner upper ring 2 to aggravate the abrasion between the outer ring 1 and the inner upper ring 2 as much as possible; utilize seal assembly 5 down to shelter from the gap between outer lane 1 and the 3 lateral walls of interior lower lane, avoid tiny solid particles such as dust to get into between outer lane 1 and the interior lower lane 3 aggravate wearing and tearing between outer lane 1 and the interior lower lane 3 as far as possible, finally influence slewing bearing's life.

Lower seal assembly 5 carries out shutoff and bearing to the emollient between outer lane 1, interior upper ring 2 and interior lower ring 3, reduces the volume in gap between outer lane 1 and the interior lower ring 3, and then is favorable to keeping good lubricated state, reduces the outer lane 1 and interior lower ring 3 between the dry friction, is favorable to prolonging slewing bearing's life.

Referring to fig. 2 and 3, the upper sealing assembly 4 includes a first sealing strip 41 and a second sealing strip 42, a first insertion groove 6 for inserting the first sealing strip 41 is formed on the top surface of the outer ring 1, the first insertion groove 6 and the outer ring 1 are coaxially arranged, the top surface of the inner upper ring 2 is higher than the top surface of the outer ring 1, a second insertion groove 7 for inserting the second sealing strip 42 is formed on the side wall of the inner upper ring 2 protruding from the top surface of the outer ring 1, the second insertion groove 7 and the inner upper ring 2 are coaxially arranged, one side of the first sealing strip 41 is inserted into the outer ring 1, the other side of the first sealing strip 41 is abutted against the side wall of the inner upper ring 2, one side of the second sealing strip 42 is inserted into the inner upper ring 2, the other side of the second sealing strip 42 is abutted against the top wall of the outer ring 1, an accommodation space 8 for accommodating the first sealing strip 41 is enclosed between the second sealing strip 42 and the top surface of the outer ring 1 and the side wall of the inner upper ring 2, the first sealing strip 41 and the second sealing strip 42 are arranged coaxially with the outer ring 1 and the inner upper ring 2.

When working under the environment that dust and the great solid particle of existence strike, utilize first sealing strip 41 to carry out preliminary shutoff to the gap between outer lane 1 and the interior upper ring 2, utilize second sealing strip 42 to carry out the shutoff to the gap between first sealing strip 41 and the interior upper ring 2, the lateral wall slope setting of first sealing strip 41 is kept away from to second sealing strip 42, be convenient for dust and granule drop from the lateral wall, avoid dust and granule to get into outer lane 1 through the gap between first sealing strip 41 and the interior upper ring 2 as far as possible, interior upper ring 2 and interior lower ring 3 between, be favorable to slowing down interior upper ring 2, interior lower ring 3 and the wearing and tearing between the outer lane 1, extension slewing bearing's life-span.

Referring to fig. 3, twenty first pull blocks 9 are fixedly connected to the side wall, away from the second sealing strip 42, of the first sealing strip 41, the first pull blocks 9 are perpendicular to the top surface of the outer ring 1, the twenty first pull blocks 9 are uniformly distributed along the circumferential direction of the first sealing strip 41, twenty second pull blocks 10 are fixedly connected to the side wall, toward the first sealing strip 41, of the second sealing strip 42, the second pull blocks 10 are perpendicular to the top surface of the outer ring 1, and the twenty second pull blocks 10 are uniformly distributed along the circumferential direction of the second sealing strip 42.

When lubricant is added among the outer ring 1, the inner upper ring 2 and the inner lower ring 3, the second sealing strip 42 is firstly pulled open by the second pulling block 10, the first sealing strip 41 is pulled open by the first pulling block 9, and dust and particles on the second sealing strip 42 slide off through the side wall of the second sealing strip 42, so that the dust and particles falling on the second sealing strip 42 are prevented from falling into a gap between the first sealing strip 41 and the inner upper ring 2 as much as possible, the quantity of the particles and dust falling between the outer ring 1 and the inner upper ring 2 is reduced, the abrasion among the inner upper ring 2, the inner lower ring 3 and the outer ring 1 is reduced, the frequency of removing and cleaning is reduced, and the service life of a slewing bearing is prolonged; utilize along interior 2 circumference evenly distributed's of going up a plurality of first drawing pieces 9 and a plurality of second drawing pieces 10 for the personnel's operation of being convenient for when adding emollient in the position of difference between circle 1 and the interior circle of going up 2, realize good interpolation emollient effect.

Referring to fig. 2 and 4, the lower sealing assembly 5 includes a lower sealing strip 51 and six sets of pressing members 52, a slot 11 for inserting the lower sealing strip 51 is formed on the bottom surface of the outer ring 1, a mounting groove 12 is formed on the bottom surface of the inner lower ring 3, the slot 11 and the outer ring 1 are coaxially arranged, the mounting groove 12 and the inner lower ring 3 are coaxially arranged, one end of the lower sealing strip 51 is inserted into the slot 11, the other end of the lower sealing strip 51 is inserted into the mounting groove 12, the six sets of pressing members 52 are all arranged in the mounting groove 12, the six sets of pressing members 52 are uniformly distributed along the circumferential direction of the mounting groove 12, the pressing members 52 are used for pressing the side wall of the lower sealing strip 51 far away from one end of the slot 11 against the groove wall of the mounting groove 12, each pressing member 52 includes a pressing arc plate 521 and a plurality of springs 522, the pressing arc plate 521 is arranged between the lower sealing strip 51 and the groove wall of the mounting groove 12, the plurality of springs 522 are uniformly arranged between the pressing arc plate 521 and the groove wall of the mounting groove 12, spring 522's one end with support and press arc board 521 fixed connection, spring 522's the other end and the cell wall fixed connection of mounting groove 12, support and press evenly to be equipped with a plurality of balls 13 on arc board 521 towards the lateral wall of lower sealing strip 51, when slewing bearing moves, relative motion takes place between outer lane 1 and the interior lower lane 3, at this moment, outer lane 1 drives lower sealing strip 51 and slides in mounting groove 12, lower sealing strip 51 with support and press taking place relative sliding between arc board 521, utilize a plurality of balls 13 to reduce and support and press the frictional force between arc board 521 and the lower seal, do not influence the reciprocal motion between outer lane 1 and the interior lower lane 3 when being favorable to realizing good shutoff effect.

When the weather strip 51 is installed, one side of the weather strip 51 is first inserted into the insert groove 11, then the pressing arc plate 521 is shifted, at this time, the spring 522 is compressed, then one side of the lower sealing strip 51 is inserted between the groove wall of the installation groove 12 and the side wall of the pressing arc plate 521, the pressing arc plate 521 is loosened, the pressing arc plate 521 moves towards the direction close to the groove wall of the installation groove 12 under the action of the elastic force of the spring 522, the lower sealing strip 51 is uniformly pressed against the groove wall of the installation groove 12 by the pressing parts 52 uniformly distributed along the circumferential direction of the outer ring 1, so that the positioning of the two sides of the lower sealing strip 51 is realized, and then realized the shutoff to the gap between outer lane 1 and the interior lower lane 3, the dust and the granule of avoiding during operation to raise get into the gap between outer lane 1 and the interior lower lane 3 in the gap between outer lane 1 and the interior lower lane 3 by the lower seal strip 51 and the interior lower lane 3 in has increased the wearing and tearing between outer lane 1 and the interior lower lane 3 and then has shortened slewing bearing's life as far as possible.

Referring to fig. 2 and 4, the lower sealing strip 51 is provided with a blocking block 14 for blocking a gap between the outer ring 1 and the inner lower ring 3 on the side wall facing the inner upper ring 2, the blocking block 14 is arranged in an inclined manner towards the side wall of the inner wall of the outer ring 1, the blocking block 14 is arranged in an inclined manner towards the side wall of the outer peripheral wall of the inner lower ring 3, the cross-sectional area of the blocking block 14 decreases progressively from one side close to the inner upper ring 2 to one side close to the inner lower ring 3, so that the blocking block 14 is conveniently plugged between the outer ring 1 and the inner lower ring 3, the volume of the gap between the outer ring 1 and the inner lower ring 3 is reduced by the blocking block 14, efficient utilization of lubricant is facilitated, the lubricant is limited in the gap between the outer ring 1 and the inner lower ring 3, and a good lubricating effect is achieved.

Referring to fig. 4, the plugging block 14 is equipped with a plurality of guiding gutters 15 on the lateral wall of interior lower circle 3 towards, utilizes a plurality of guiding gutters 15 to make when changing lower seal strip 51, at first utilizes guiding gutters 15 to empty out the emollient between outer lane 1 and interior lower circle 3, pulls down lower seal strip 51 again, and the clearance of being convenient for realizes good change clearance effect.

The implementation principle of the three-row roller type slewing bearing in the embodiment of the application is as follows: when working under the environment that dust and the great solid particle of existence strike, utilize first sealing strip 41 to carry out preliminary shutoff to the gap between outer lane 1 and the interior upper ring 2, utilize second sealing strip 42 to carry out the shutoff to the gap between first sealing strip 41 and the interior upper ring 2, the lateral wall slope setting of first sealing strip 41 is kept away from to second sealing strip 42, be convenient for fall the ash, avoid dust and foreign matter to get into outer lane 1 through the gap between first sealing strip 41 and the interior upper ring 2 as far as possible, between interior upper ring 2 and the interior lower ring 3, be favorable to slowing down interior upper ring 2, the wearing and tearing between interior lower ring 3 and the outer lane 1, the life-span of extension slewing bearing.

When the weather strip 51 is installed, one side of the weather strip 51 is first inserted into the insert groove 11, then the pressing arc plate 521 is shifted, at this time, the spring 522 is compressed, then one side of the lower sealing strip 51 is inserted between the groove wall of the installation groove 12 and the side wall of the pressing arc plate 521, the pressing arc plate 521 is loosened, the pressing arc plate 521 moves towards the direction close to the groove wall of the installation groove 12 under the action of the elastic force of the spring 522, the lower sealing strip 51 is uniformly pressed against the groove wall of the installation groove 12 by the pressing parts 52 uniformly distributed along the circumferential direction of the outer ring 1, so that the positioning of the two sides of the lower sealing strip 51 is realized, and then realized the shutoff to the gap between outer lane 1 and the interior lower lane 3, the dust and the granule of avoiding during operation to raise get into the gap between outer lane 1 and the interior lower lane 3 in the gap between outer lane 1 and the interior lower lane 3 by the lower seal strip 51 and the interior lower lane 3 in has increased the wearing and tearing between outer lane 1 and the interior lower lane 3 and then has shortened slewing bearing's life as far as possible.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a three rows of roller slewing bearing, includes outer lane (1), interior upper ring (2) and interior lower circle (3), interior upper ring (2) with interior lower circle (3) is equal coaxial setting in outer lane (1) is inside, the bottom surface of interior upper ring (2) with interior lower circle (3) laminating, its characterized in that: the sealing device also comprises an upper sealing component (4) used for sealing a gap between the outer ring (1) and the inner upper ring (2) and a lower sealing component (5) used for supporting lubricant between the outer ring (1) and the inner lower ring (3).

2. The three-row roller slewing bearing of claim 1, wherein: go up seal assembly (4) including first sealing strip (41) and second sealing strip (42), one side of first sealing strip (41) with outer lane (1) plug-in connection, the opposite side of first sealing strip (41) with interior upper ring (2) butt, one side of second sealing strip (42) with interior upper ring (2) plug-in connection, the opposite side of second sealing strip (42) with outer lane (1) butt, second sealing strip (42) set up first sealing strip (41) is kept away from one side of interior upper ring (2), first sealing strip (41) with second sealing strip (42) all with outer lane (1) with interior upper ring (2) coaxial setting.

3. The three-row roller slewing bearing of claim 2, wherein: first sealing strip (41) keep away from outer lane (1) with fixed connection is equipped with a plurality of first drawing piece (9) on the lateral wall in gap between interior upper ring (2), and is a plurality of first drawing piece (9) are followed the circumference evenly distributed of first sealing strip (41), second sealing strip (42) are kept away from outer lane (1) with fixed connection is equipped with a plurality of seconds and draws piece (10), a plurality of on the lateral wall in gap between interior upper ring (2) the second draws piece (10) to follow the circumference evenly distributed of second sealing strip (42).

4. The three-row roller slewing bearing of claim 1, wherein: the lower sealing assembly (5) comprises a lower sealing strip (51) and a plurality of pressing pieces (52), one side of the lower sealing strip (51) is inserted and arranged on the peripheral wall, facing the inner lower ring (3), of the outer ring (1), the peripheral wall, facing the outer ring (1), of the inner lower ring (3) is provided with a mounting groove (12), the other side of the lower sealing strip (51) is inserted and arranged in the mounting groove (12), the pressing pieces (52) are evenly distributed along the circumferential direction of the outer ring (1), and the pressing pieces (52) are used for tightly pressing the lower sealing strip (51) against the groove wall of the mounting groove (12).

5. The three-row roller slewing bearing of claim 4, wherein: the pressing piece (52) comprises a pressing arc plate (521) and a spring (522), one side of the pressing arc plate (521) is abutted against the side wall, far away from the groove wall of the mounting groove (12), of the lower sealing strip (51), the other side of the pressing arc plate (521) is fixedly connected with the spring (522), and one end, far away from the pressing arc plate (521), of the spring (522) is fixedly connected with the side wall, far away from the lower sealing strip (51), of the mounting groove (12).

6. The three-row roller slewing bearing of claim 5, wherein: a plurality of balls (13) are rotatably arranged between the pressing arc plate (521) and the lower sealing strip (51).

7. The three-row roller slewing bearing of claim 6, wherein: the lower sealing strip (51) faces the side wall of the inner upper ring (2) and is provided with a blocking block (14) used for blocking a gap between the outer ring (1) and the inner lower ring (3).

8. The three-row roller slewing bearing of claim 7, wherein: the side wall of the blocking block (14) facing the inner lower ring (3) is provided with a plurality of diversion trenches (15) for diverting the lubricant between the outer ring (1) and the inner lower ring (3).

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