CN114278667A

CN114278667A - Slewing bearing and ship loader chute

Info

Publication number: CN114278667A
Application number: CN202111416667.6A
Authority: CN
Inventors: 涂建平; 黄焕晟; 陈振森; 张传瑶
Original assignee: Guoneng Zhuhai Port Co ltd
Current assignee: Guoneng Zhuhai Port Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-04-05

Abstract

The invention relates to a slewing bearing and a chute of a ship loader. Because the outer lane be equipped with the lubrication hole on the surface, and this lubrication hole and storage tank intercommunication, consequently, when the ball needs to lubricate, the operation personnel only need pour into lubricating oil into to the lubrication hole in, make it flow into in the storage tank, can realize the lubrication to the ball, so, make things convenient for lubricated operation greatly to guarantee the normal operation of shipment machine swift current section of thick bamboo. Meanwhile, the lubricating hole is formed in the surface of the outer ring exposed outside, so that the oil injection position is exposed outside the slewing bearing, and at the moment, an operator does not need to match with the suspension cage to enter the sliding barrel, the risk of lubricating operation is effectively reduced, and the safety in the operation process is improved. In addition, the lubricating efficiency is greatly improved, and the lubricating time is greatly saved.

Description

Slewing bearing and ship loader chute

Technical Field

The invention relates to the technical field of ship loaders, in particular to a slewing bearing and a ship loader chute.

Background

The ship loader is a large bulk cargo machine used in bulk cargo wharf loading, and generally comprises a boom belt conveyor, a transition belt conveyor, a telescopic chute, a tail car, a traveling device, a gantry, a tower, a pitching device and the like. In order to realize the rotation of the chute, a slewing bearing is usually arranged on the chute, and the material around the material throwing spoon is scattered by the slewing bearing.

When an existing ship loader sliding barrel slewing bearing is lubricated, the sliding barrel slewing bearing is high in position and narrow in space, during lubrication, the sliding barrel needs to be manually fed into the sliding barrel for lubrication, meanwhile, the sliding barrel needs to be matched with a suspension cage, and the lubricating is difficult and the danger is high.

Disclosure of Invention

Based on the above, a rotary support and a slide tube of a ship loader are needed to be provided, so that lubrication is convenient, and the normal operation of the slide tube of the ship loader is ensured; and simultaneously, the safety of the operation is improved.

A slewing bearing, comprising: an inner ring; the outer ring is sleeved outside the inner ring, a containing groove extending along the circumferential direction of the inner ring is arranged between the outer ring and the inner ring, a lubricating hole is formed in the surface, exposed to the outside, of the outer ring relative to the inner ring, and the lubricating hole is communicated with the containing groove; the ball is located in the accommodating groove.

In the slewing bearing, the balls are arranged between the outer ring and the inner ring, so that the outer ring can rotate relative to the inner ring, and the chute barrel arranged on the outer ring can rotate. Because the outer lane be equipped with the lubrication hole on the surface, and this lubrication hole and storage tank intercommunication, consequently, when the ball needs to lubricate, the operation personnel only need pour into lubricating oil into to the lubrication hole in, make it flow into in the storage tank, can realize the lubrication to the ball, so, make things convenient for lubricated operation greatly to guarantee the normal operation of shipment machine swift current section of thick bamboo. Meanwhile, the lubricating hole is formed in the surface of the outer ring exposed outside, so that the oil injection position is exposed outside the slewing bearing, and at the moment, an operator does not need to match with the suspension cage to enter the sliding barrel, the risk of lubricating operation is effectively reduced, and the safety in the operation process is improved.

In one embodiment, the lubrication hole includes a first hole section and a second hole section, the first hole section is disposed on the surface of the outer ring and extends along the axial direction of the outer ring, the second hole section is disposed on the groove wall of the accommodating groove and extends along the radial direction of the outer ring, and the first hole section is communicated with the second hole section.

In one embodiment, the outer ring is provided with a first surface and a second surface which are opposite to each other along the axial direction of the outer ring, the first surface and the second surface are both arranged along the circumferential extension of the inner ring, and the first surface and/or the second surface are/is provided with the lubricating hole.

In one embodiment, the slewing bearing further comprises a first seal, the first seal is arranged on the inner ring and extends along the circumferential direction of the inner ring, and one end, facing away from the inner ring, of the first seal extends to the first surface.

In one embodiment, the slewing bearing further comprises a second seal, the second seal is arranged on the inner ring and extends along the circumferential direction of the inner ring, and one end, facing away from the inner ring, of the second seal extends to the second surface.

In one embodiment, the slewing bearing further includes a first protrusion provided on the first surface and extending along a circumferential direction of the inner ring.

In one embodiment, the slewing bearing further includes a guard member provided on the inner ring and extending along a circumferential direction of the inner ring, and at least a part of the guard member is located on a side of the first protrusion facing away from the inner ring.

In one embodiment, the protection member includes a connecting portion and a second protrusion disposed on the connecting portion, the connecting portion is circumferentially disposed on the inner ring and located above the first protrusion, and the second protrusion is located on a side of the first protrusion facing away from the inner ring and extends in a direction toward the outer ring.

In one embodiment, the slewing bearing further comprises an oil nozzle, and the oil nozzle is embedded in one end of the lubricating hole.

In one embodiment, the slewing bearing further comprises a one-way valve, and the one-way valve is arranged in the lubricating hole to allow lubricating oil to flow into the accommodating groove from the lubricating hole in a one-way mode.

In one embodiment, the number of the lubricating holes is at least two, and at least two lubricating holes are arranged at intervals along the circumferential direction of the inner ring.

A loader chute comprising a slewing bearing as claimed in any one of the preceding claims.

The slide barrel of the ship loader adopts the slewing bearing, and the ball is arranged between the outer ring and the inner ring, so that the outer ring can rotate relative to the inner ring, and the slide barrel arranged on the outer ring can rotate. Because the outer lane be equipped with the lubrication hole on the surface, and this lubrication hole and storage tank intercommunication, consequently, when the ball needs to lubricate, the operation personnel only need pour into lubricating oil into to the lubrication hole in, make it flow into in the storage tank, can realize the lubrication to the ball, so, make things convenient for lubricated operation greatly to guarantee the normal operation of shipment machine swift current section of thick bamboo. Meanwhile, the lubricating hole is formed in the surface of the outer ring exposed outside, so that the oil injection position is exposed outside the slewing bearing, and at the moment, an operator does not need to match with the suspension cage to enter the sliding barrel, the risk of lubricating operation is effectively reduced, and the safety in the operation process is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a first embodiment of a slewing bearing structure;

FIG. 2 is a schematic view of the structure of the lubricating hole and the ball according to an embodiment;

FIG. 3 is a schematic view of the overall structure of the slewing bearing according to an embodiment;

fig. 4 is a sectional view of a slewing bearing structure according to an embodiment.

100. A slewing bearing; 110. an inner ring; 111. a guard; 1111. a connecting portion; 1112. a second convex portion; 112. a second mounting hole; 120. an outer ring; 121. a first surface; 122. a second surface; 123. a lubrication hole; 1231. a first bore section; 1232. a second bore section; 124. a drive tooth; 125. a first convex portion; 126. a first mounting hole; 127. a nozzle tip; 130. a containing groove; 140. a ball bearing; 150. a first seal member; 160. a second seal.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In one embodiment, referring to fig. 1 and fig. 3, a slewing bearing 100 includes: inner race 110, outer race 120, and balls 140. The outer ring 120 is sleeved outside the inner ring 110, a receiving groove 130 extending along the circumferential direction of the inner ring 110 is formed between the outer ring 120 and the inner ring 110, and a lubrication hole 123 is formed in the surface of the outer ring 120 exposed to the inner ring 110. The lubrication hole 123 communicates with the accommodation groove 130. The balls 140 are located in the receiving groove 130.

In the slewing bearing 100, the balls 140 are provided between the outer ring 120 and the inner ring 110 so that the outer ring 120 can rotate relative to the inner ring 110 to slew the chute mounted on the outer ring 120. Because the surface of the outer ring 120 is provided with the lubricating hole 123, and the lubricating hole 123 is communicated with the containing groove 130, when the ball 140 needs to be lubricated, an operator only needs to inject lubricating oil into the lubricating hole 123 to enable the lubricating oil to flow into the containing groove 130, so that the ball 140 can be lubricated, and thus, the lubrication operation is greatly facilitated, and the normal operation of the slide tube of the ship loader is ensured. Meanwhile, the lubricating hole 123 is formed in the surface of the outer ring 120 exposed outside, so that the oil injection position is exposed outside the slewing bearing 100, and at the moment, an operator does not need to match with a suspension cage to enter the chute barrel, the risk of lubricating operation is effectively reduced, and the safety in the operation process is improved. In addition, the lubricating efficiency is greatly improved, and the lubricating time is greatly saved.

It should be noted that the "surface" of the outer ring 120 is understood as: with respect to inner race 110, outer race 120 is exposed at an outer surface of inner race 110. Of course, the outer ring 120 may be any surface other than the inner surface facing the inner ring 110. Meanwhile, when designing the lubrication hole 123, the lubrication hole 123 may be provided on any surface of the outer ring 120, for example: the lubrication hole 123 is provided in the top surface of the outer ring 120; alternatively, the lubrication hole 123 is provided in the bottom surface of the outer ring 120; alternatively, the lubrication hole 123 may be provided on a cylindrical surface.

Note that, the lubricating hole 123 should be designed so as not to penetrate the outer ring 120, that is, when the lubricating hole 123 is opened on the outer surface of the outer ring 120, one end thereof cannot penetrate the outer surface of the outer ring 120, and a vertical penetration structure is formed.

In addition, the lubrication mode of the embodiment can be manual lubrication or automatic lubrication. Such as: an automatic lubricating device is additionally arranged on the slewing bearing 100, so that the lubricating mode is more flexible.

Further, referring to fig. 2, the lubrication hole 123 includes a first hole section 1231 and a second hole section 1232. The first hole section 1231 is provided on the surface of the outer ring 120 and extends in the axial direction of the outer ring 120. The second hole section 1232 is disposed on the groove wall of the receiving groove 130 and extends along the radial direction of the outer ring 120. The first bore section 1231 communicates with the second bore section 1232. Accordingly, when the lubricant is injected into the first hole section 1231, the lubricant flows into the second hole section 1232; and then flows into the receiving groove 130 through the second hole section 1232, so as to lubricate the ball 140. Since the first hole section 1231 is axially extended and the second hole section 1232 is radially extended, the first hole section 1231 and the second hole section 1232 at least intersect with each other. Thus, when the outer ring 120 rotates, the lubricating oil in the containing groove 130 can be effectively prevented from being easily thrown out of the lubricating hole 123 due to the action of centrifugal force, so that the lubricating oil is better reserved in the containing groove 130, the balls 140 are better lubricated, and the sliding barrel of the ship loader is further ensured to run stably.

It should be noted that the first hole section 1231 and the second hole section 1232 may be both straight holes or curved holes. When the first hole section 1231 and the second hole section 1232 are both straight holes, they may be designed at various angles, and of course, they are designed vertically, so that the structural performance is better. When the first and

second aperture sections

1231, 1232 are both curved apertures, there are various specific designs, such as: spiral design, S-shaped circuitous design, etc.

In addition, in order to reduce the flow resistance between the first and

second hole sections

1231 and 1232, an arc section may be disposed between the first and

second hole sections

1231 and 1232, so that the lubricating oil flows smoothly.

In one embodiment, referring to fig. 1, the outer ring 120 has a first surface 121 and a second surface 122 opposite to each other along its axial direction. The first surface 121 and the second surface 122 are both arranged along the circumferential extension of the inner ring 110, and the first surface 121 and/or the second surface 122 are provided with lubrication holes 123. In this way, the particular arrangement of the lubrication holes 123 on the first surface 121 and/or on the second surface 122 makes the operation more convenient; and at the same time, the driving of the outer ring 120 by the motor is not affected.

It should be noted that the rotation of the outer ring 120 is driven by an external motor, such as: the side of the outer ring 120 facing away from the inner ring 110 is provided with driving teeth 124, which engage with the teeth, so that the motor drives the outer ring 120 to rotate. Of course, the outer ring 120 may not have a tooth structure, such as: the transmission is carried out through a belt or a chain and the like.

Specifically, referring to fig. 3, a side of the outer ring 120 facing away from the inner ring 110 is provided with driving teeth 124.

Further, referring to fig. 1, the slewing bearing 100 further includes a first sealing member 150. First seal 150 is disposed on inner ring 110 and extends along the circumferential direction of inner ring 110, and an end of first seal 150 facing away from inner ring 110 extends onto first surface 121, so that first seal 150 can cover the gap between outer ring 120 and inner ring 110, and prevent external impurities or dust from entering between outer ring 120 and inner ring 110 to cause slewing bearing 100 to be jammed. In addition, the first sealing member 150 can prevent the leakage of the lubricating oil to a certain extent, thereby effectively improving the working environment. The first sealing member 150 may be a sealing rubber.

In one embodiment, referring to fig. 1, the slewing bearing 100 further comprises a second seal 160. A second seal 160 is disposed on inner race 110 and extends along a circumferential direction of inner race 110, and an end of second seal 160 facing away from inner race 110 extends onto second surface 122. Similarly, the second sealing element 160 can cover the gap between the outer ring 120 and the inner ring 110, so as to prevent external impurities or dust from entering between the outer ring 120 and the inner ring 110 to cause the slewing bearing 100 to be jammed. In addition, the second sealing member 160 can prevent the leakage of the lubricating oil to a certain extent, thereby effectively improving the working environment. Wherein the second sealing member 160 may be a sealing rubber.

In one embodiment, referring to fig. 1, the pivoting support 100 further includes a first protrusion 125. First projection 125 is provided on first surface 121 and extends along the circumferential direction of inner race 110. As such, the gap between the outer ring 120 and the inner ring 110 is equivalent to a protection structure to prevent external impurities or dust from flowing radially between the outer ring 120 and the inner ring 110 to block the slewing bearing 100. Meanwhile, the first protrusion 125 can prevent the lubricant between the outer ring 120 and the inner ring 110 from being centrifugally thrown out, thereby ensuring that the surface of the slewing bearing 100 is clean and tidy.

Alternatively, the first protrusion 125 may be mounted on the outer ring 120 by bolting, pinning, snapping, riveting, welding, bonding, integrally molding, or the like. Wherein, the integral forming comprises the processes of casting, die casting, injection molding and the like.

Further, referring to fig. 1 and fig. 4, the slewing bearing 100 further includes a protection member 111. The protection piece 111 is disposed on the inner ring 110 and extends along the circumferential direction of the inner ring 110, and at least a portion of the protection piece 111 is located on a side of the first protrusion 125 facing away from the inner ring 110, i.e., the embodiment forms a second protection structure outside the first protrusion 125, so as to further prevent external impurities or dust from entering between the outer ring 120 and the inner ring 110.

Further, referring to fig. 1, the protection component 111 includes a connection portion 1111 and a second protrusion 1112 disposed on the connection portion 1111. The connection portion 1111 is circumferentially disposed on the inner ring 110 and located above the first protrusion 125, so that the connection portion 1111 presents a shielding structure for the first protrusion 125, thereby preventing a space between the first protrusion 125 and the inner ring 110 from being exposed, and effectively reducing the probability that impurities or dust fall into a gap between the outer ring 120 and the inner ring 110. In addition, the second protrusion 1112 is located on a side of the first protrusion 125 facing away from the inner ring 110, and extends in a direction toward the outer ring 120. Namely, two kinds of first protrusions 125 and second protrusions 1112 staggered up and down are formed outside the inner ring 110, so that better protection is obtained between the inner ring 110 and the outer ring 120, and the operation of the slewing bearing 100 is ensured to be more stable and safer.

Alternatively, the connection between the second protrusion 1112 and the connection portion 1111 may be, but not limited to, a bolt connection, a snap connection, a rivet connection, a pin connection, a welding, an integral molding, and the like.

Specifically, referring to fig. 4, the second protrusion 1112 and the connection portion 1111 are integrated, which is not only beneficial to simplifying the manufacturing process of the protection element 111, but also beneficial to enhancing the overall structural strength of the protection element 111 and improving the stability of the overall structure.

In one embodiment, referring to fig. 1, an end of the second protrusion 1112 far from the connection portion 1111 is lower than an end of the first protrusion 125 far from the outer ring 120, so that impurities or dust entering into the gap between the outer ring 120 and the inner ring 110 must be moved in a curved manner, which greatly increases the difficulty of dust falling, thereby effectively ensuring the stable operation of the slewing bearing 100. In addition, by the design, the probability that the lubricating oil is thrown out is greatly reduced, and the operation environment of the ship loader sliding barrel is ensured to be clean and sanitary.

In one embodiment, referring to fig. 2, the slewing bearing 100 further comprises a nozzle 127. Glib 127 inlays the one end of locating lubrication hole 123, so, through glib 127 for lubricating oil can better pour into in the lubrication hole 123 into, thereby makes the lubricated operation more convenient.

Alternatively, the specific mounting manner of the oil nipple 127 in the lubrication hole 123 may be, but is not limited to, screwing, clipping, welding, bonding, and the like.

In one embodiment, referring to fig. 4, slewing bearing 100 further comprises a one-way valve (not shown). The check valve is disposed in the lubricating hole 123 to allow the lubricating oil to flow into the accommodating groove 130 from the lubricating hole 123 in a single direction, so that the lubricating oil can be effectively prevented from flowing out of the accommodating groove 130 from the lubricating hole 123 in a reverse direction, and sufficient lubricating oil is ensured in the accommodating groove 130, thereby enabling the rotation of the slewing bearing 100 to be smoother.

In one embodiment, referring to fig. 4, the number of the lubrication holes 123 is at least two. At least two lubrication holes 123 are arranged along the circumference interval of inner ring 110, so, with a plurality of lubrication holes 123 circumference design for the interior circumferential oil feed of storage tank 130 guarantees to obtain even lubrication in the storage tank 130, thereby makes slewing bearing 100's rotation more smooth and easy. Meanwhile, the at least two lubricating holes 123 are used for simultaneously injecting oil into the accommodating groove 130, so that the oil injection time can be reduced, and the lubricating efficiency of the slewing bearing 100 can be improved.

In one embodiment, referring to fig. 1, the outer ring 120 is provided with a first mounting hole 126, and the inner ring 110 is provided with a second mounting hole 112. In this way, the outer ring 120 and the inner ring 110 are respectively mounted on different structures through the first mounting hole 126 and the second mounting hole 112, for example: the outer ring 120 is connected with the chute, and the inner ring 110 is connected with other fixed structures (such as a receiving hopper or a middle-section chute).

It should be noted that the number of the first mounting holes 126 may be one or more. When the first mounting holes 126 are plural, the plural first mounting holes 126 are arranged at intervals along the circumferential direction of the outer ring 120. Similarly, the number of the second mounting holes 112 may be one or more. When the second mounting hole 112 is plural, the plural second mounting holes 112 are arranged at intervals along the circumferential direction of the inner race 110.

In one embodiment, referring to figure 1, a loader chute comprises a slewing bearing 100 of any of the above embodiments.

The slide tube of the ship loader adopts the slewing bearing 100, and the balls 140 are arranged between the outer ring 120 and the inner ring 110, so that the outer ring 120 can rotate relative to the inner ring 110, and the slide tube arranged on the outer ring 120 can rotate. Because the surface of the outer ring 120 is provided with the lubricating hole 123, and the lubricating hole 123 is communicated with the containing groove 130, when the ball 140 needs to be lubricated, an operator only needs to inject lubricating oil into the lubricating hole 123 to enable the lubricating oil to flow into the containing groove 130, so that the ball 140 can be lubricated, and thus, the lubrication operation is greatly facilitated, and the normal operation of the slide tube of the ship loader is ensured. Meanwhile, the lubricating hole 123 is formed in the surface of the outer ring 120 exposed outside, so that the oil injection position is exposed outside the slewing bearing 100, and at the moment, an operator does not need to match with a suspension cage to enter the chute barrel, the risk of lubricating operation is effectively reduced, and the safety in the operation process is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A slewing bearing, characterized in that it comprises:

an inner ring;

the outer ring is sleeved outside the inner ring, a containing groove extending along the circumferential direction of the inner ring is arranged between the outer ring and the inner ring, a lubricating hole is formed in the surface, exposed to the outside, of the outer ring relative to the inner ring, and the lubricating hole is communicated with the containing groove;

the ball is located in the accommodating groove.

2. The slewing bearing according to claim 1, wherein the lubrication hole includes a first hole section provided in a surface of the outer ring and extending in an axial direction of the outer ring, and a second hole section provided in a groove wall of the accommodating groove and extending in a radial direction of the outer ring, the first hole section communicating with the second hole section.

3. The slewing bearing according to claim 1, wherein the outer ring is provided with opposite first and second surfaces in its axial direction, the first and second surfaces each being provided along a circumferential extension of the inner ring, the first and/or second surfaces being provided with the lubrication hole.

4. The slewing bearing of claim 3, further comprising a first seal disposed on the inner ring and extending along a circumferential direction of the inner ring, wherein an end of the first seal facing away from the inner ring extends onto the first surface; and/or the presence of a gas in the gas,

the slewing bearing further comprises a second sealing element, the second sealing element is arranged on the inner ring and extends along the circumferential direction of the inner ring, and one end, back to the inner ring, of the second sealing element extends to the second surface.

5. The slewing bearing according to claim 3, further comprising a first protrusion provided on the first surface and extending in a circumferential direction of the inner ring.

6. The slewing bearing according to claim 5, further comprising a guard member provided on the inner ring and extending along a circumferential direction of the inner ring, wherein at least a portion of the guard member is located on a side of the first protrusion facing away from the inner ring.

7. The slewing bearing according to claim 6, wherein the guard member includes a connecting portion provided circumferentially on the inner ring and located above the first projection, and a second projection provided on a side of the first projection facing away from the inner ring and extending in a direction toward the outer ring.

8. The slewing bearing according to any one of claims 1-7, further comprising a nozzle tip embedded in one end of the lubrication hole; and/or the presence of a gas in the gas,

the slewing bearing further comprises a one-way valve, and the one-way valve is arranged in the lubricating hole to allow lubricating oil to flow into the accommodating groove from the lubricating hole in a one-way mode.

9. The slewing bearing according to any one of claims 1 to 7, wherein the number of the lubrication holes is at least two, and at least two of the lubrication holes are arranged at intervals along the circumferential direction of the inner ring.

10. A loader chute characterized in that it comprises a slewing bearing according to any of claims 1-9.