Slewing bearing and engineering machinery

Abstract

The utility model relates to the technical field of bearings, in particular to a pivotal bearing and engineering machinery, the pivotal bearing comprises an inner ring, an outer ring and a roller, a cavity is formed between the inner ring and the outer ring, and the roller is arranged in the cavity; the slewing bearing further comprises a lubricating flow channel and a first sealing assembly, the lubricating flow channel comprises a liquid inlet flow channel and a liquid outlet flow channel which are communicated with the cavity, the first sealing assembly is detachably connected to the lubricating flow channel, the relubricating performance of the slewing bearing can be improved, and the service life of the slewing bearing is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a slewing bearing and engineering machinery. Background Technology

[0002] In related technologies, slewing bearings typically have raceways inside for the flow of lubricating grease and the rolling of rollers. This allows the rollers inside the bearing to rotate and be lubricated by the grease, thus ensuring good rotational flexibility of the slewing bearing. However, when slewing bearings are used under harsh working conditions, mud, water, or gravel can seep into the raceways, which can easily wear down the rollers and contaminate the lubricating grease, resulting in a shorter service life for the slewing bearing. Utility Model Content

[0003] Based on the above-mentioned technical problems, this utility model provides a slewing bearing and engineering machinery, which can improve the relubrication performance of the slewing bearing itself, thereby increasing the service life of the slewing bearing and at least partially solving the above-mentioned technical problems.

[0004] In a first aspect, the present invention provides a slewing bearing, the slewing bearing comprising an inner ring, an outer ring, and rollers, wherein a cavity is formed between the inner ring and the outer ring, and the rollers are disposed in the cavity; the slewing bearing further comprises a lubrication channel and a first sealing assembly, the lubrication channel comprising an inlet channel and an outlet channel communicating with the cavity, and the first sealing assembly being detachably connected to the lubrication channel.

[0005] Optionally, the inlet channel is located in the inner ring, and the outlet channel is located in the outer ring; the inner ring has an inlet communicating with the inlet channel, and the outer ring has an outlet communicating with the outlet channel; the first sealing assembly can be connected to the inlet and the outlet to seal the lubrication channel.

[0006] Optionally, there are two first sealing components, which are respectively disposed at the inlet and the outlet. Each first sealing component includes a one-way flow structure. The one-way flow structure disposed at the inlet is used to allow the lubricating medium to flow unidirectionally from the inlet to the outlet. The one-way flow structure disposed at the outlet is used to allow the lubricating medium to flow unidirectionally from the inlet to the outlet.

[0007] Optionally, the first sealing assembly further includes a threaded bushing, the inner wall of the liquid outlet channel is provided with a threaded section near the outlet, the outer wall of the threaded bushing is screwed to the threaded section, and the inner wall of the threaded bushing is screwed to the one-way flow structure.

[0008] Optionally, multiple chambers are arranged at axial intervals along the inner and outer rings, and the number of lubrication channels is multiple and corresponds one-to-one with each chamber.

[0009] Optionally, a sealing gap communicating with the chamber is formed between the inner ring and the outer ring, and the rotary bearing further includes a second sealing assembly sandwiched between the inner ring and the outer ring, the second sealing assembly being used to seal the sealing gap.

[0010] Optionally, the second sealing assembly includes: a first seal, one side of which is connected to the inner ring and the other side abutting against the outer ring; and a second seal, one side of which is connected to the outer ring and the other side abutting against the inner ring.

[0011] Optionally, the first seal includes a first connecting portion, a first sealing lip, and a first pressure plate. The first pressure plate is used to fix the first connecting portion to the inner ring, and the first sealing lip is connected to the first connecting portion and abuts against the outer ring. The second seal includes a second connecting portion, a second sealing lip, and a second pressure plate. The second pressure plate is used to fix the second connecting portion to the outer ring, and the second sealing lip is connected to the second connecting portion and abuts against the inner ring.

[0012] Optionally, both the first sealing lip and the second sealing lip are two bends that are angled to each other.

[0013] Secondly, this utility model provides an engineering machinery, including the slewing bearing described in any of the above-mentioned optional solutions.

[0014] Through the above-described technical solution, namely the slewing bearing provided by this utility model, when the inner ring rotates relative to the outer ring, the relative rotation between the inner and outer rings can be achieved by rollers located in the chamber. Furthermore, lubrication of the rollers can be achieved by filling the lubrication channels and chamber with lubricating grease. The lubrication channels can also be sealed by a first sealing component to prevent lubricating grease leakage. However, when this slewing bearing is used for a long time under harsh working conditions, mud, water, or gravel can easily seep into the chamber between the inner and outer rings, thereby affecting the rotational efficiency of the rollers and easily causing... If the lubricating grease in the chamber is contaminated, the first sealing assembly can be removed from the lubrication channel. New lubricating grease can be injected into the chamber through the inlet channel, and the contaminated lubricating grease can be discharged through the outlet channel. After all the contaminated lubricating grease has been discharged through the outlet channel, the first sealing assembly can be reinstalled into the lubrication channel to seal it, thus completing the replacement of the lubricating grease. Through the above operation steps, the relubrication performance of the slewing bearing can be improved, and the service life of the slewing bearing can be further extended. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the overall structure of the slewing bearing provided in an exemplary embodiment of this utility model;

[0017] Figure 2 yes Figure 1 A magnified view of a portion of position A in the middle;

[0018] Figure 3 This is a schematic diagram of the internal structure of one side of the slewing bearing provided in an exemplary embodiment of this utility model;

[0019] Figure 4 yes Figure 3 A magnified view of a portion of position B in the middle;

[0020] Figure 5 This is a partial structural diagram of the top of the slewing bearing provided in an exemplary embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Inner ring; 110. Imported;

[0023] 2. Outer ring; 210. Exit;

[0024] 3. Roller;

[0025] 4. Chamber;

[0026] 5. Lubrication channel; 510. Inlet channel; 520. Outlet channel;

[0027] 6. First sealing assembly; 610. One-way flow structure; 620. Threaded bushing;

[0028] 7. Sealing gap;

[0029] 8. Second sealing assembly; 810. First sealing element; 811. First connecting part; 812. First sealing lip; 813. First pressure plate; 820. Second sealing element; 821. Second connecting part; 822. Second sealing lip; 823. Second pressure plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] In related technologies, slewing bearings typically have raceways inside for the flow of lubricating grease and the rolling of rollers. This allows the rollers inside the bearing to rotate and be lubricated by the grease, thus ensuring good rotational flexibility of the slewing bearing. However, when slewing bearings are used under harsh working conditions, mud, water, or gravel can seep into the raceways, which can easily wear down the rollers and contaminate the lubricating grease, resulting in a shorter service life for the slewing bearing.

[0032] In view of the above-mentioned technical problems, the first aspect of this utility model provides a slewing bearing, with reference to... Figures 1 to 5 As shown, the slewing bearing includes an inner ring 1, an outer ring 2, and rollers 3, wherein a cavity 4 is formed between the inner ring 1 and the outer ring 2, the rollers 3 are disposed in the cavity 4, and the slewing bearing also includes a lubrication channel 5 and a first sealing assembly 6. The lubrication channel 5 includes an inlet channel 510 and an outlet channel 520 communicating with the cavity 4, and the first sealing assembly 6 is detachably connected to the lubrication channel 5.

[0033] Through the above technical solution, namely the slewing bearing provided by this utility model, when the inner ring 1 rotates relative to the outer ring 2, the relative rotation between the inner ring 1 and the outer ring 2 can be achieved by the rollers 3 located in the chamber 4. Furthermore, the rollers 3 can be lubricated by filling the lubrication channel 5 and the chamber 4 with lubricating grease. The lubrication channel 5 can also be sealed by the first sealing component 6 to prevent lubricating grease leakage. However, when this slewing bearing is used for a long time under harsh working conditions, mud, water, or gravel can easily seep into the chamber 4 between the inner ring 1 and the outer ring 2, thereby affecting the rotational efficiency of the rollers 3 and making them prone to contamination. If the lubricating grease in chamber 4 is contaminated, the first sealing component 6 can be removed from the lubrication channel 5. New lubricating grease can be injected into chamber 4 through the inlet channel 510, and the contaminated lubricating grease can be discharged through the outlet channel 520. After all the contaminated lubricating grease has been discharged through the outlet channel 520, the first sealing component 6 can be reinstalled into the lubrication channel 5 to seal it, thus completing the replacement of the lubricating grease. Through the above operation steps, the relubrication performance of the slewing bearing can be improved, and the service life of the slewing bearing can be further extended.

[0034] It should be further explained that, under harsh operating conditions, mud, water, or gravel can easily seep into the chamber 4 through the gap between the inner ring 1 and the outer ring 2 (corresponding to the sealing gap 7 below), which can easily contaminate the lubricating grease in the chamber 4 and cause wear on the roller 3. Considering that a gap must be maintained between the inner ring 1 and the outer ring 2 to ensure that the inner ring 1 does not directly contact the outer ring 2, so as to prevent wear between the inner ring 1 and the outer ring 2 and to ensure that the inner and outer rings can rotate relative to each other, the technical solution provided by this utility model is to add an inlet channel 510 and an outlet channel 520 that are connected to the chamber 4, thereby improving the relubrication performance of the slewing bearing without affecting the relative rotation of the inner ring 1 and the outer ring 2 of the slewing bearing.

[0035] Furthermore, in the above embodiments, the orientation and position of the inlet channel 510 and the outlet channel 520 can be arbitrary. For example, the inlet channel 510 and the outlet channel 520 can both be located on the inner ring 1 and communicate with the chamber 4, or they can both be located on the outer ring 2 and communicate with the chamber 4, or they can be arranged as follows. Figure 3 As shown, the inlet channel 510 is located on the inner ring 1, and the outlet channel 520 is located on the outer ring 2. When lubricating grease needs to be injected or replaced, lubricating grease can be injected into the chamber 4 through the inlet channel 510 on the inner ring 1, and contaminated lubricating grease can be discharged through the outlet channel 520 on the outer ring 2. Furthermore, the orientation of the inlet channel 510 and the outlet channel 520 can also be as shown... Figure 3 In the figure, the fluid inlet channel 510 and the fluid outlet channel 520 can extend radially along the slewing bearing, or in other directions not shown in the figure. For example, the fluid inlet channel 510 and the fluid outlet channel 520 can also extend axially along the slewing bearing, or extend obliquely.

[0036] Furthermore, the number of inlet channels 510 and outlet channels 520 can be arbitrarily suitable; that is, the number of each inlet channel 510 and outlet channel 520 can be at least one or more, and the number of inlet channels 510 and outlet channels 520 can be the same or different, for example, refer to Figure 3 As shown, there are two inlet channels 510, spaced apart along the axial direction of the slewing bearing, and two outlet channels 520, also spaced apart along the axial direction of the slewing bearing. Lubricating grease can be supplied simultaneously through the two inlet channels 510 and the two outlet channels 520, and... Figure 3 The two rollers 3 in the middle are lubricated.

[0037] Further explanation of the above embodiments is that the inlet channel 510 and the outlet channel 520 can be arranged in a suitable manner according to the actual arrangement position of the rollers 3. For example, when multiple rollers 3 are arranged at circumferential intervals between the inner ring 1 and the outer ring 2, multiple inlet channels 510 and outlet channels 520 can also be arranged at circumferential intervals along the slewing bearing so as to lubricate multiple rollers 3 at the same time. This utility model does not make specific limitations in this regard.

[0038] The first sealing component 6 can also be any suitable structure capable of sealing the lubrication channel 5. For example, the first sealing component 6 can be a plug, sealing plug or other suitable structure. The specific structure of the first sealing component 6 will be described in detail below, but will not be elaborated on here.

[0039] In some implementations, reference Figures 1 to 5 As shown, the inlet channel 510 is located in the inner ring 1, and the outlet channel 520 is located in the outer ring 2; wherein, the inner ring 1 is provided with an inlet 110 communicating with the inlet channel 510, and the outer ring 2 is provided with an outlet 210 communicating with the outlet channel 520. The first sealing assembly 6 can be connected to the inlet 110 and the outlet 210 to seal the lubrication channel 5.

[0040] In this manner, the first sealing assembly 6 can seal the lubrication channel 5 by blocking the inlet 110 and the outlet 210, thereby preventing the lubricating grease that has been injected into the lubrication channel 5 from being discharged from the inlet channel 510 or the outlet channel 520. (Refer to...) Figure 3 As shown, when lubricating grease is injected into the lubrication channel 5, the first sealing component 6 can be removed from the inlet 110 and the outlet 210 to inject the lubricating grease into the chamber 4 from the inlet channel 510 and discharge the old lubricating grease through the outlet channel 520. When the new lubricating grease has been completely injected into the inlet channel 510, the chamber 4 and the outlet channel 520, it means that the old lubricating grease has been completely discharged. At this time, the first sealing component 6 can be used to seal the inlet 110 and the outlet 210 so that the lubricating grease can be stored in the lubrication channel 5 and the chamber 4 for normal lubrication of the roller 3.

[0041] In some implementations, reference Figures 1 to 5 As shown, there are two first sealing components 6, which are respectively disposed at the inlet 110 and the outlet 210. Each first sealing component 6 includes a one-way flow structure 610. The one-way flow structure 610 disposed on the inlet 110 is used to allow the lubricating medium to flow unidirectionally from the inlet 110 to the outlet 210. The one-way flow structure 610 disposed on the outlet 210 is used to allow the lubricating medium to flow unidirectionally from the inlet 110 to the outlet 210.

[0042] In this way, the one-way flow structure 610 of the first sealing component 6 allows lubricating grease to flow in one direction. The one-way flow structures 610 provided on the inlet 110 and the outlet 210 are both configured to flow in one direction from the inlet 110 to the outlet 210. In this arrangement, when lubricating grease is injected from the inlet 110, it can be injected in one direction from the outlet 210 through the one-way flow structure 610. This can reduce or prevent the occurrence of lubricating grease leakage from the inlet 110 during injection or normal use of the slewing bearing.

[0043] In the above arrangement, the unidirectional flow structure 610 is used to allow the lubricating medium to flow unidirectionally from the inlet 110 to the outlet 210, and also ensures that the pressure inside the lubrication channel 5 is constant, so that the lubricating grease can be smoothly pumped into the lubrication channel 5, i.e. Figure 3 As shown, when the first sealing assembly 6 is installed at both the inlet 110 and the outlet 210, the lubrication channel 5 is sealed by the first sealing assemblies 6 at both ends. At this time, the pressure in the lubrication channel 5 remains constant. When no lubricating grease has been injected into the lubrication channel 5, there will be gas in the lubrication channel 5. When the lubricating grease is injected into the lubrication channel 5 through the one-way flow structure 610 in the first sealing assembly 6 at the inlet 110, the gas remaining in the lubrication channel 5 will be pushed out by the injected lubricating grease from the first sealing assembly 6 at the outlet 210. That is, the gas is discharged from the one-way flow structure 610 in the first sealing assembly 6 at the outlet 210. After all the gas has been discharged, the operator can check the status of the first sealing assembly 6 at the outlet 210. If a small amount of lubricating grease seeps out from the one-way flow structure 610 of the first sealing assembly 6, it means that the lubricating grease has been completely injected into the lubrication channel 5. At this time, the rotary bearing can operate normally.

[0044] As can be seen from the above, the one-way flow structure 610 of the first sealing component 6 allows for the normal injection of lubricating grease into the lubrication channel 5 without disassembling the first sealing component 6. That is, it can be understood that after the rotary bearing is manufactured and assembled, there is no lubricating grease in the lubrication channel 5. In order to prevent dust or other contaminants from entering the lubrication channel 5, the first sealing component 6 can be installed in advance at the inlet 110 and the outlet 210 to initially seal the lubrication channel 5. Then, lubricating grease can be injected into the lubrication channel 5 through the one-way flow structure 610 via the first sealing component 6 located at the inlet 110.

[0045] After the slewing bearing has been working under harsh conditions for a long time, the first sealing component 6 installed on the outlet 210 can be removed, and new lubricating grease can be injected through the one-way flow structure 610 at the inlet 110. At this time, the contaminated lubricating grease will carry the mud or gravel remaining in the lubrication channel 5 out of the outlet 210, so as to realize the relubrication capability of the slewing bearing.

[0046] It can be understood that during the initial lubrication process after the slewing bearing is manufactured, the first sealing component 6 can facilitate the injection of grease and prevent grease leakage. When the slewing bearing is lubricated, removing the first sealing component 6 from the outlet 210 can quickly remove contaminants.

[0047] Furthermore, the first sealing component 6 mentioned in the above embodiments can be constructed as a structure with a one-way valve, such as a grease nipple. That is, the one-way valve inside the grease nipple is a one-way flow structure 610, so as to ensure that the lubricating grease can flow smoothly in one direction.

[0048] In some implementations, reference Figure 3 and Figure 4 As shown, the first sealing assembly 6 also includes a threaded bushing 620. The inner wall of the liquid outlet channel 520 is provided with a threaded section near the outlet 210. The outer wall of the threaded bushing 620 is screwed to the threaded section, and the inner wall of the threaded bushing 620 is screwed to the one-way flow structure 610.

[0049] In this way, considering that the first sealing assembly 6 located at outlet 210 is located within the liquid outlet channel 520, a threaded bushing 620 is provided to facilitate the complete removal of the first sealing assembly 6 located at outlet 210 when changing the lubricating grease. The threaded bushing 620 allows for convenient complete removal of the first sealing assembly 6 at outlet 210 when disassembly is required. This can be referred to as... Figure 3 and Figure 4 As shown, since the inner wall of the threaded bushing 620 is screwed to the one-way flow structure 610 and the outer wall is screwed to the threaded section of the outlet 210, during disassembly, it is only necessary to rotate the threaded bushing 620 relative to the outlet 210 to disassemble the threaded bushing 620 and the one-way flow structure 610 as a whole from the outlet 210, so as to achieve disassembly and more conveniently and quickly disassembling the first sealing component 6.

[0050] In some implementations, reference Figures 1 to 5 As shown, multiple chambers 4 are arranged at intervals along the axial direction of the inner ring 1 and the outer ring 2, and the number of lubrication channels 5 is multiple and corresponds one-to-one with the chambers 4.

[0051] In this way, multiple chambers 4 arranged at intervals along the axial direction can accommodate multiple rows of rollers 3, thereby improving the smoothness of the rotation process of the slewing bearing. The multiple rows of rollers 3 can also be lubricated simultaneously through multiple lubrication channels 5, thereby improving the lubrication capability of the rollers 3.

[0052] In some implementations, reference Figures 1 to 4 As shown, a sealing gap 7 communicating with the chamber 4 is formed between the inner ring 1 and the outer ring 2. The rotary bearing also includes a second sealing assembly 8 sandwiched between the inner ring 1 and the outer ring 2. The second sealing assembly 8 is used to seal the sealing gap 7.

[0053] In this way, the sealing gap 7 allows for a space between the inner ring 1 and the outer ring 2, enabling relative rotation between them. The second sealing assembly 8 seals the sealing gap 7, thereby reducing or preventing the leakage of lubricating grease from the chamber 4 along the sealing gap 7 and improving the sealing performance of the lubricating grease.

[0054] It should be noted that the second sealing component 8 can also be any suitable structure capable of sealing the sealing gap 7. For example, the second sealing component 8 may include a sealing ring or other structure surrounding the outer side wall of the inner ring 1 and the inner side wall of the outer ring 2. The second sealing component 8 will be described in detail below.

[0055] In some implementations, reference Figures 1 to 4 As shown, the second sealing assembly 8 includes a first sealing element 810 and a second sealing element 820, wherein one side of the first sealing element 810 is connected to the inner ring 1 and the other side abuts against the outer ring 2; one side of the second sealing element 820 is connected to the outer ring 2 and the other side abuts against the inner ring 1.

[0056] In this way, the inner ring 1 and outer ring 2 of the slewing bearing can respectively seal the sealing gap 7 on both sides along the axial direction of the slewing bearing through the first seal 810 and the second seal 820. Furthermore, the first seal 810 is connected to the inner ring 1 and the second seal 820 is connected to the outer ring 2, which can improve the ease of assembly of the slewing bearing itself. That is to say, before assembling the slewing bearing, the first seal 810 can be connected to the inner ring 1 first, and the second seal 820 can be connected to the outer ring 2. Then, the inner ring 1 and the outer ring 2 can be assembled together, so that the other side of the first seal 810 abuts against the outer ring 2 and the other side of the second seal 820 abuts against the inner ring 1, so that the first seal 810 and the second seal 820 simultaneously seal the space between the inner ring 1 and the outer ring 2.

[0057] Furthermore, in the above embodiments, both the first sealing member 810 and the second sealing member 820 can be sealing ring structures that surround the outer side wall of the inner ring 1 and the inner side wall of the outer ring 2, and the sealing gap 7 can be sealed by the sealing ring.

[0058] In some implementations, reference Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the first sealing member 810 includes a first connecting portion 811, a first sealing lip 812, and a first pressure plate 813. The first pressure plate 813 is used to fix the first connecting portion 811 to the inner ring 1, and the first sealing lip 812 is connected to the first connecting portion 811 and abuts against the outer ring 2. The second sealing member 820 includes a second connecting portion 821, a second sealing lip 822, and a second pressure plate 823. The second pressure plate 823 is used to fix the second connecting portion 821 to the outer ring 2, and the second sealing lip 822 is connected to the second connecting portion 821 and abuts against the inner ring 1.

[0059] In the above manner, when assembling the first seal 810 with the inner ring 1, the first connecting part 811 can be connected to the inner ring 1 first, and the first connecting part 811 can be pressed and fixed by the first pressure plate 813. Similarly, when assembling the second seal 820 with the outer ring 2, the second connecting part 821 can be connected to the outer ring 2, and the second connecting part 821 can be pressed and fixed by the second pressure plate 823. After the above assembly is completed, the inner ring 1 and the outer ring 2 can be assembled. When assembling the inner ring 1 and the outer ring 2, the first sealing lip 812 can be abutted against the inner side wall of the outer ring 2, and the second sealing lip 822 can be abutted against the outer side wall of the inner ring 1. Thus, the assembly is completed. The sealing gap 7 between the inner ring 1 and the outer ring 2 can be sealed by the first sealing lip 812 and the second sealing lip 822, so as to prevent the lubricating grease located in the chamber 4 and the sealing gap 7 from leaking outward, thereby improving the sealing performance of the lubricating grease.

[0060] Furthermore, refer to Figure 2 and Figure 3 As shown, both the first sealing lip 812 and the second sealing lip 822 can be two bends arranged at an angle to each other. These two bends further improve the sealing effect on the sealing gap 7, i.e., as... Figure 3 As shown, the two bends can form two seals respectively, which can prevent the leakage of lubricating grease and reduce the entry of external impurities into the sealing gap 7 and the chamber 4.

[0061] Furthermore, the orientation of the bent portions of the first sealing lip 812 and the second sealing lip 822 can be different, that is, they can be as follows: Figure 3As shown, the two bends of the first sealing lip 812 face the outer ring 2 of the slewing bearing, and the two bends of the second sealing lip 822 face the inner ring 1 of the slewing bearing. This arrangement of different orientations is based on the difference in thickness between the inner ring 1 and the outer ring 2 of the slewing bearing, and the appropriate arrangement is selected according to the thickness difference between the inner ring 1 and the outer ring 2. Figure 3 As shown, the inner ring 1 and the outer ring 2 are arranged differently in the axial direction. By arranging the two sealing lips in different directions, it can be ensured that the two bent parts of the first sealing lip 812 and the second sealing lip 822 are both within the sealing gap 7, so as to achieve a good sealing effect on the sealing gap 7.

[0062] Furthermore, in the above embodiments, the two bends arranged on a single sealing lip can have any suitable bending angle between them; for example, the two bends can be arranged as follows: Figure 2 or Figure 3 The two bends are at 90° to each other, or they can be other suitable angles, such as 30°, 45°, 60° or other angles, as long as the two bends can provide a good seal for the inner ring 1 and the outer ring 2. This utility model does not make any specific limitations in this regard.

[0063] In a second aspect, this utility model provides an engineering machinery, which includes the slewing bearing mentioned in the above specific embodiments, and the slewing bearing has all the beneficial effects of the above embodiments. The engineering machinery can be, for example, an excavator, a crane, a pile driver, a drilling rig, or other machinery, and the slewing bearing can be applied to, for example, the bending part of the connecting rod assembly in the above-mentioned machinery, or to the crank, the base connection, the motor output end, or other positions that require rotation.

[0064] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of protection claimed by the present invention.

Claims

1. A slewing bearing, characterized in that, The slewing bearing includes an inner ring (1), an outer ring (2) and rollers (3), with a cavity (4) formed between the inner ring (1) and the outer ring (2), and the rollers (3) disposed in the cavity (4); The slewing bearing further includes a lubrication channel (5) and a first sealing assembly (6). The lubrication channel (5) includes an inlet channel (510) and an outlet channel (520) communicating with the chamber (4). The first sealing assembly (6) is detachably connected to the lubrication channel (5).

2. The slewing bearing according to claim 1, characterized in that, The liquid inlet channel (510) is located in the inner ring (1), and the liquid outlet channel (520) is located in the outer ring (2); The inner ring (1) is provided with an inlet (110) communicating with the liquid inlet channel (510), and the outer ring (2) is provided with an outlet (210) communicating with the liquid outlet channel (520). The first sealing assembly (6) can be connected to the inlet (110) and the outlet (210) to seal the lubrication channel (5).

3. The slewing bearing according to claim 2, characterized in that, The number of the first sealing components (6) is two, and the two first sealing components (6) are respectively disposed at the inlet (110) and the outlet (210). The first sealing component (6) includes a one-way flow structure (610). The one-way flow structure (610) provided on the inlet (110) is used to allow the lubricating medium to flow unidirectionally from the inlet (110) to the outlet (210); The one-way flow structure (610) provided on the outlet (210) is used to allow the lubricating medium to flow unidirectionally from the inlet (110) to the outlet (210).

4. The slewing bearing according to claim 3, characterized in that, The first sealing assembly (6) further includes a threaded bushing (620), the inner wall of the liquid outlet channel (520) is provided with a threaded section near the outlet (210), the outer wall of the threaded bushing (620) is screwed to the threaded section, and the inner wall of the threaded bushing (620) is screwed to the one-way flow structure (610).

5. The slewing bearing according to any one of claims 1-4, characterized in that, The chambers (4) are arranged in multiple ways along the axial direction of the inner ring (1) and the outer ring (2), and the number of lubrication channels (5) is multiple and corresponds one-to-one with the chambers (4).

6. The slewing bearing according to claim 5, characterized in that, A sealing gap (7) communicating with the chamber (4) is formed between the inner ring (1) and the outer ring (2). The rotary bearing also includes a second sealing assembly (8) sandwiched between the inner ring (1) and the outer ring (2), which is used to seal the sealing gap (7).

7. The slewing bearing according to claim 6, characterized in that, The second sealing assembly (8) includes: The first seal (810) is connected to the inner ring (1) on one side and abuts against the outer ring (2) on the other side. The second seal (820) is connected to the outer ring (2) on one side and abuts against the inner ring (1) on the other side.

8. The slewing bearing according to claim 7, characterized in that, The first sealing element (810) includes a first connecting part (811), a first sealing lip (812) and a first pressure plate (813). The first pressure plate (813) is used to fix the first connecting part (811) to the inner ring (1). The first sealing lip (812) is connected to the first connecting part (811) and abuts against the outer ring (2). The second seal (820) includes a second connecting part (821), a second sealing lip (822), and a second pressure plate (823). The second pressure plate (823) is used to fix the second connecting part (821) to the outer ring (2). The second sealing lip (822) is connected to the second connecting part (821) and abuts against the inner ring (1).

9. The slewing bearing according to claim 8, characterized in that, The first sealing lip (812) and the second sealing lip (822) are both two bends that are set at an angle to each other.

10. An engineering machinery, characterized in that, Including the slewing bearing as described in any one of claims 1-9.

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