Slewing bearing and working machine

Abstract

The invention relates to the technical field of engineering machinery, and discloses a slewing bearing and an operation machine.The slewing bearing comprises an inner ring and an outer ring, the inner ring and the outer ring are rotationally connected through rolling bodies, and a gap is formed between the inner ring and the outer ring; the sealing piece is arranged on the first side of the slewing bearing, a first sealing groove is formed in the first side of the inner ring, a second sealing groove is formed in the first side of the outer ring, one end of the sealing piece is inserted into the first sealing groove, and the other end of the sealing piece is inserted into the second sealing groove; the first oil way channel is arranged in the inner ring, one end of the first oil way channel communicates with the first sealing groove, and the other end of the first oil way channel communicates with the gap. The two ends of the sealing piece are inserted into the inner ring and the outer ring respectively, so that the sealing piece reliably covers the gap, dust, water and other impurities are effectively prevented from entering the slewing bearing, internal lubricating grease can enter the sealing groove from the gap and the first oil way channel under the action of gravity so as to lubricate the sealing piece, the sealing performance of the sealing piece is improved, and the service life of the slewing bearing is prolonged. Therefore, reliability of the sealing piece is enhanced, service life of the slewing bearing is prolonged, and safe and stable operation of equipment is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and particularly relates to a slewing bearing and a working machine. Background Art

[0002] As a core basic component of construction machinery, the slewing bearing plays a key role in the slewing motion system of equipment such as excavators, cranes, and loaders. With the diversified development of engineering construction requirements, construction machinery such as excavators are increasingly frequently used in water operation scenarios (such as fish pond excavation, river dredging, placer gold mining, etc.). However, the existing slewing bearings with ordinary sealing structures have significant limitations in waterproof performance and cannot effectively resist water intrusion. Under the working conditions of wading operation, water is extremely easy to penetrate into the interior of the slewing bearing, resulting in deterioration of the performance of the lubricating medium and corrosion of metal components, and further causing faults such as raceway wear and increased clearance, seriously affecting the service life of the slewing bearing and reducing the reliability of the equipment.

[0003] Therefore, researching and developing a slewing bearing with a highly reliable waterproof sealing structure has important practical significance and engineering value for improving the adaptability and operation efficiency of construction machinery in complex water environments and ensuring the safe and stable operation of the equipment. Summary of the Invention

[0004] The present invention provides a slewing bearing and a working machine to solve or improve the problem that the waterproof sealing performance of the slewing bearing in the related art is poor, and its interior will cause problems such as poor lubrication and rust due to water seepage under wading working conditions, and long-term use will cause faults such as increased clearance, seriously affecting the service life of the slewing bearing and reducing the reliability of the equipment.

[0005] In a first aspect, the present invention provides a slewing bearing, comprising:

[0006] An inner ring and an outer ring coaxially arranged with the inner ring, the inner ring and the outer ring are rotationally connected by rolling elements, and there is a gap between the inner ring and the outer ring;

[0007] A seal, arranged on the first side of the slewing bearing, a first seal groove is provided on the first side of the inner ring, a second seal groove is provided on the first side of the outer ring, one end of the seal is inserted into the first seal groove and the other end is inserted into the second seal groove;

[0008] A first oil passage, arranged in the inner ring, one end of the first oil passage is communicated with the first seal groove and the other end is communicated with the gap.

[0009] In an optional embodiment, the first seal groove is arranged along the radial direction of the inner ring, and the first oil passage includes:

[0010] The first oil passage is arranged radially along the inner ring, and one end of the first oil passage communicates with the first sealing groove;

[0011] The second oil passage is arranged axially along the inner ring, and one end of the second oil passage communicates with the other end of the first oil passage;

[0012] The third oil passage is arranged radially along the inner ring. The third oil passage is located above the first oil passage, and the other end of the second oil passage communicates with one end of the third oil passage, and the other end of the third oil passage communicates with the gap.

[0013] In an alternative embodiment, the end of the second oil passage communicating with the first oil passage penetrates through to the end face of the inner ring. The slewing bearing further includes a plugging member adapted to the second oil passage, and the plugging member is adapted to cover the opening of the second oil passage.

[0014] In an alternative embodiment, the sealing member includes a first sealing portion and a second sealing portion arranged at an angle. One of the first sealing portion and the second sealing portion is inserted into the first sealing groove, and the other is inserted into the second sealing groove.

[0015] In an alternative embodiment, at least one annular groove is provided on the outer wall of the first sealing portion, and the annular grooves are arranged at intervals along the length direction of the first sealing portion. On the first side of the slewing bearing, the first sealing portion is inserted into the first sealing groove.

[0016] In an alternative embodiment, a convex portion is provided on the end face of the second sealing portion. On the first side of the slewing bearing, the second sealing portion is inserted into the second sealing groove, and the second sealing groove is provided with a card slot section adapted to the convex portion, and the convex portion is clamped in the card slot section.

[0017] In an alternative embodiment, the sealing member is further provided on the second side of the slewing bearing. A third sealing groove is provided on the second side of the inner ring, and a fourth sealing groove is provided on the second side of the outer ring. One end of the sealing member is inserted into the third sealing groove and the other end is inserted into the fourth sealing groove.

[0018] In an alternative embodiment, on the second side of the slewing bearing, the first sealing portion of the sealing member is inserted into the fourth sealing groove, and the second sealing portion of the sealing member is inserted into the third sealing groove.

[0019] In an alternative embodiment, it further includes:

[0020] The second oil passage is arranged in the outer ring. One end of the second oil passage communicates with the fourth sealing groove, the other end penetrates through to the end face of the outer ring, and a nozzle is arranged at the other end of the second oil passage.

[0021] In a second aspect, the present invention also provides a working machine, including the slewing bearing as described in any one of the above.

[0022] For the slewing bearing provided by the present invention, by inserting both ends of the seal into the inner ring and the outer ring respectively, so that the seal reliably covers the gap between the inner and outer rings, it can effectively prevent impurities such as dust and water from entering the inside of the slewing bearing, and the lubricating grease inside the slewing bearing can enter the sealing groove from the gap between the inner and outer rings and the first oil passage under the action of gravity to lubricate the seal, which can improve the sealing performance of the seal, thereby enhancing the reliability of the seal in use and increasing the service life of the slewing bearing, ensuring the safe and stable operation of the equipment. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the slewing bearing according to an embodiment of the present invention;

[0025] Figure 2 For Figure 1 a partial enlarged schematic diagram at A in

[0026] Figure 3 For Figure 2 a partial enlarged schematic diagram at C in

[0027] Figure 4 It is a partial schematic diagram of the second sealing groove according to an embodiment of the present invention;

[0028] Figure 5 It is a partial schematic diagram of the second sealing groove according to another embodiment of the present invention;

[0029] Figure 6 For Figure 1 a partial enlarged schematic diagram at B in

[0030] Explanation of the Reference Numerals:

[0031] 1. Inner ring; 101. First sealing groove; 102. Third sealing groove; 1021. Card slot part; 2. Outer ring; 201. Second sealing groove; 2011. Card slot section; 202. Fourth sealing groove; 3. Rolling element; 4. Gap; 5. Seal; 501. First sealing part; 5011. Annular groove; 502. Second sealing part; 5021. Protrusion; 6. First side; 7. Second side; 8. First oil passage; 801. First oil channel; 802. Second oil channel; 803. Third oil channel; 9. Plugging part; 10. Second oil passage; 1001. Fourth oil channel; 1002. Fifth oil channel; 11. Oil nozzle. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0034] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0036] The following will describe the slewing bearing and the working machine according to the embodiments of the present invention in conjunction with Figures 1 to 6 .

[0037] According to an embodiment of the present invention, on the one hand, a slewing bearing is provided, which is suitable for being applied to construction machinery such as excavators, cranes, loaders, etc. The slewing bearing includes an inner ring 1, an outer ring 2, a seal 5, and a first oil passage 8. Specifically, as Figure 1 shown, the inner ring 1 and the outer ring 2 are coaxially arranged, and the inner ring 1 and the outer ring 2 are rotatably connected by rolling elements 3. Optionally, the rolling elements 3 are steel balls, and there is a gap 4 between the inner ring 1 and the outer ring 2. Specifically, taking an excavator as an example for illustration, the upper part and the lower part of the excavator are rotatably connected by a slewing bearing. Among them, the inner ring 1 of the slewing bearing is connected to the lower part, and the outer ring 2 is connected to the upper part, for example, by bolt connection or the like. When the slewing bearing works, the inner ring 1 remains stationary, and the outer ring 2 can rotate relative to the inner ring 1, thereby driving the upper part to perform a slewing motion.

[0038] As Figure 1 shown, a seal 5 is provided on the first side 6 of the slewing bearing. A first seal groove 101 is provided on the first side 6 of the inner ring 1, and a second seal groove 201 is provided on the first side 6 of the outer ring 2. One end of the seal 5 is inserted into the first seal groove 101, and the other end of the seal 5 is inserted into the second seal groove 201. The first oil passage 8 is provided in the inner ring 1. One end of the first oil passage 8 is communicated with the first seal groove 101, and the other end of the first oil passage 8 is communicated with the gap 4. It should be noted that taking the placement position of the slewing bearing as shown in Figure 1 , Figure 1 the first side 6 of the slewing bearing in

[0039] With such a setting, by inserting both ends of the seal 5 into the inner ring 1 and the outer ring 2 respectively, so that the seal 5 firmly seals the gap 4 between the inner ring 1 and the outer ring 2, it can effectively prevent impurities such as dust and moisture from entering the inside of the slewing bearing. Moreover, the lubricating grease in the raceway inside the slewing bearing can enter the first sealing groove 101 along the gap 4 between the inner ring 1 and the outer ring 2 and the first oil passage 8 under the action of gravity to lubricate the seal 5, which can improve the sealing performance of the seal 5, thereby enhancing the reliability of use of the seal 5, increasing the service life of the slewing bearing, and ensuring the safe and stable operation of the equipment.

[0040] Optionally, in some embodiments of the present invention, as Figure 1 shown, the first sealing groove 101 is arranged along the radial direction of the inner ring 1. Specifically, the first sealing groove 101 is arranged on the side wall of the inner ring 1 and extends along the radial direction of the inner ring 1, so as to facilitate the insertion of the seal 5 into the first sealing groove 101 of the inner ring 1.

[0041] As Figure 2 shown, the first oil passage 8 includes a first oil duct 801, a second oil duct 802, and a third oil duct 803. The first oil duct 801 is arranged along the radial direction of the inner ring 1, and one end of the first oil duct 801 is communicated with the first sealing groove 101. The second oil duct 802 is arranged along the axial direction of the inner ring 1, and one end of the second oil duct 802 is communicated with the other end of the first oil duct 801. The third oil duct 803 is arranged along the radial direction of the inner ring 1, the third oil duct 803 is located above the first oil duct 801, and the other end of the second oil duct 802 is communicated with one end of the third oil duct 803, and the other end of the third oil duct 803 is communicated with the gap 4. It should be noted that taking the placement position of the slewing bearing as shown in Figure 2 the up and down directions in it are the up and down orientations referred to. Figure 2 In the up and down directions in it are the up and down orientations referred to.

[0042] With such a setting, under the action of gravity, the lubricating grease in the raceway will overflow and then flow downward into the gap 4, and then flow to the first sealing groove 101 along the third oil duct 803, the second oil duct 802 and the first oil duct 801 in sequence, so as to achieve the purpose of self-lubricating the seal 5. This helps to extend the service life of the seal 5 and maintain the stability of its sealing performance. Moreover, due to the limited installation space at the lower end of the slewing bearing, adopting the above self-lubricating structure simplifies the lubrication system of the slewing bearing, can effectively avoid the interference problem caused by installing lubricating components between the slewing bearing and the lower vehicle installation platform, has a simple structure, is convenient for processing, and is easy to install.

[0043] Optionally, in some embodiments of the present invention, as Figure 2As shown, one end of the second oil passage 802 communicating with the first oil passage 801 penetrates to the end face of the inner ring 1, that is, the lower end of the second oil passage 802 extends to the lower surface of the inner ring 1. The slewing bearing further includes a plugging member 9 adapted to the second oil passage 802, and the plugging member 9 is adapted to cover the opening of the second oil passage 802. Optionally, the plugging member 9 is a threaded plug, and the lower end of the second oil passage 802 is provided with an internal thread adapted to the threaded plug, and the threaded plug is screwed into the second oil passage 802 to block the opening of the second oil passage 802. With such a setting, it is convenient to machine the second oil passage 802 in the inner ring 1, and by screwing in or pulling out the plugging member 9, it is convenient for later maintenance and operations such as replacing lubricating grease.

[0044] Optionally, in some embodiments of the present invention, as Figure 2 shown, the seal 5 includes a first seal portion 501 and a second seal portion 502 arranged at an angle. One of the first seal portion 501 and the second seal portion 502 is inserted into the first seal groove 101, and the other is inserted into the second seal groove 201. That is to say, the first seal portion 501 is inserted into the first seal groove 101, and the second seal portion 502 is inserted into the second seal groove 201; or, the second seal portion 502 is inserted into the first seal groove 101, and the first seal portion 501 is inserted into the second seal groove 201.

[0045] Specifically, as Figure 2 shown, the angle between the first seal portion 501 and the second seal portion 502 is 90 degrees to form an "L"-shaped seal. Among them, the side wall of the inner ring 1 is provided with a first seal groove 101, the first seal portion 501 is inserted into the first seal groove 101, the lower surface of the outer ring 2 is provided with a second seal groove 201, and the second seal portion 502 is inserted into the second seal groove 201. Optionally, as Figure 2 shown, the upper side wall of the first seal groove 101 can be flush with the lower surface of the outer ring 2, so that the first seal portion 501 can fit the surface of the outer ring 1 and extend into the first seal groove 101. Thus, it is convenient to firmly and tightly fix the seal 5 on the first side 6 of the inner ring 1 and the outer ring 2, and further seal the gap 4 between the inner ring 1 and the outer ring 2 to prevent external impurities (such as dust, moisture, etc.) from entering the interior of the slewing bearing and protecting the internal components from contamination and corrosion, etc.

[0046] Optionally, in some embodiments of the present invention, as Figure 3 shown, at least one annular groove 5011 is provided on the outer wall of the first seal portion 501, and the annular grooves 5011 are arranged at intervals along the length direction of the first seal portion 501. It can be understood that parameters such as the number and spacing of the annular grooves 5011 need to be specifically determined according to actual design requirements. For example, as Figure 3As shown, the number of the annular grooves 5011 is multiple, and each annular groove 5011 is evenly distributed along the length direction of the first sealing portion 501. It should be noted that, taking the placement position of the slewing bearing as shown in Figure 3 as an example, Figure 3 the left - right direction is the length direction of the first sealing portion 501. And as shown in Figure 1 and Figure 2 at the first side 6 of the slewing bearing, the first sealing portion 501 is inserted into the first sealing groove 101.

[0047] With such a design, by arranging multiple annular grooves 5011, the lubricating grease in the first sealing groove 101 can flow into the annular grooves 5011, thereby enhancing the lubrication effect of the first sealing portion 501, enabling the seal 5 to be fully lubricated, reducing the wear of the seal 5 and extending its service life, lowering the maintenance frequency and cost of the equipment, reducing the occurrence of equipment failures, and improving the overall reliability and operating efficiency of the equipment.

[0048] Optionally, in some embodiments of the present invention, as shown in Figure 2 the end face of the second sealing portion 502 is provided with a protrusion 5021, and as shown in Figure 1 at the first side 6 of the slewing bearing, the second sealing portion 502 is inserted into the second sealing groove 201. Further, as shown in Figure 4 the second sealing groove 201 is provided with a clamping groove section 2011 adapted to the protrusion 5021, and the protrusion 5021 is clamped in the clamping groove section 2011. For example, the second sealing portion 502 can be assembled into the second sealing groove 201 by directly pressing. Optionally, as shown in Figure 2 and Figure 4 if the protrusion 5021 is a wedge - shaped protrusion, the clamping groove section 2011 is correspondingly designed as a wedge - shaped clamping groove so that the protrusion 5021 and the clamping groove section 2011 are tightly fitted and fixed. Of course, in some other embodiments, the protrusion 5021 and the clamping groove section 2011 include but are not limited to being designed as a matching wedge - shaped structure, and can also be designed as an arc - shaped structure, etc., as shown in Figure 5 as an example.

[0049] With such a setting, through the mutual cooperation and connection of the protrusion 5021 and the clamping groove section 2011, it can effectively play a role in preventing detachment, facilitate the reliable fixation of the seal 5, realize the rapid installation of the seal 5, simplify the installation structure, reduce the use of other components, improve the assembly efficiency, and reduce the equipment cost.

[0050] Optionally, in some embodiments of the present invention, as shown in Figure 1 the second side 7 of the slewing bearing is also provided with a seal 5, and as shown in Figure 6As shown, the second side 7 of the inner ring 1 is provided with a third sealing groove 102, and the second side 7 of the outer ring 2 is provided with a fourth sealing groove 202. One end of the seal 5 is inserted into the third sealing groove 102, and the other end of the seal 5 is inserted into the fourth sealing groove 202. It should be noted that, taking the placement position of the slewing bearing as shown in Figure 1 as an example, Figure 1 the second side 7 of the slewing bearing is the other side opposite to the first side 6 of the slewing bearing, that is, the upper end of the slewing bearing, which is also the side where the slewing bearing is connected to the upper vehicle.

[0051] With such a setting, seals 5 are also arranged at the upper end of the slewing bearing, enabling double-sided sealing on the upper and lower sides of the slewing bearing. Thus, a complete sealed space is formed among the inner raceway, the gap 4 between the inner ring 1 and the outer ring 2, and the seal 5, which can effectively prevent foreign matters such as dust and moisture from entering the inner raceway, thereby optimizing the lubrication performance of the slewing bearing and enhancing the service life of the slewing bearing.

[0052] Optionally, in some embodiments of the present invention, referring to Figure 1 and Figure 6 as shown, on the second side 7 of the slewing bearing, the first sealing portion 501 of the seal 5 is inserted into the fourth sealing groove 202, and the second sealing portion 502 of the seal 5 is inserted into the third sealing groove 102. Specifically, as shown in Figure 6 , the seal 5 has an "L" - shaped structure and includes a first sealing portion 501 and a second sealing portion 502. On the second side 7 of the slewing bearing, the side wall of the outer ring 2 is provided with a fourth sealing groove 202, and the fourth sealing groove 202 is arranged along the radial direction of the outer ring 2, and the first sealing portion 501 is inserted into the fourth sealing groove 202. The upper surface of the inner ring 1 is provided with a third sealing groove 102, and the third sealing groove 102 is arranged along the axial direction of the inner ring 1, and the second sealing portion 502 is inserted into the third sealing groove 102. Optionally, as shown in Figure 6 , the lower side wall of the fourth sealing groove 202 can be flush with the upper surface of the inner ring 1 so that the first sealing portion 501 can fit the surface of the inner ring 1 and extend into the fourth sealing groove 202. It should be noted that, taking the placement position of the slewing bearing as shown in Figure 6 as an example, Figure 6 the up - down direction refers to the up - down orientation.

[0053] With such a setting, the seal 5 can be firmly and tightly fixed on the second side 7 of the inner ring 1 and the outer ring 2, thereby sealing the gap 4 between the inner ring 1 and the outer ring 2 and preventing external impurities such as dust and moisture from entering the interior of the slewing bearing, protecting the internal components from pollution, corrosion, etc.

[0054] Furthermore, in some embodiments of the present invention, as shown in Figure 6As shown, on the second side 7 of the slewing bearing, a convex portion 5021 is provided on the end face of the second sealing portion 502, and the third sealing groove 102 is provided with a clamping groove portion 1021 adapted to the convex portion 5021. The convex portion 5021 is clamped in the clamping groove portion 1021. For example, the second sealing portion 502 can be assembled into the third sealing groove 102 by directly pressing or the like. Optionally, as Figure 6 shown, the convex portion 5021 is a wedge-shaped convex, and the clamping groove portion 1021 is correspondingly designed as a wedge-shaped clamping groove, so that the convex portion 5021 and the clamping groove portion 1021 are tightly fitted and fixed by the double barb structures on both sides, playing a strong anti-detachment function. Of course, in some other embodiments, the convex portion 5021 and the clamping groove portion 1021 include but are not limited to being designed as the above-mentioned wedge-shaped structure, and can also be designed as an arc-shaped structure, etc. Such a design makes the installation of the seal 5 convenient and enables the seal 5 to be firmly installed on the slewing bearing.

[0055] Optionally, in some embodiments of the present invention, as Figure 1 shown, the slewing bearing further includes a second oil passage 10. The second oil passage 10 is provided in the outer ring 2. One end of the second oil passage 10 is communicated with the fourth sealing groove 202, and the other end of the second oil passage 10 penetrates through to the end face of the outer ring 2, and a nozzle 11 is provided at the other end of the second oil passage 10.

[0056] Specifically, as Figure 6 shown, the second oil passage 10 includes a fourth oil passage 1001 and a fifth oil passage 1002. The fourth oil passage 1001 is arranged along the radial direction of the outer ring 2, and one end of the fourth oil passage 1001 is communicated with the fourth sealing groove 202. The fifth oil passage 1002 is arranged along the axial direction of the outer ring 2, and one end of the fifth oil passage 1002 is communicated with the other end of the fourth oil passage 1001. The other end of the fifth oil passage 1002 penetrates through to the upper surface of the outer ring 2, which is convenient for machining the second oil passage 10. An internal thread adapted to the nozzle 11 is provided at the upper end opening of the fifth oil passage 1002, and the nozzle 11 is threadedly connected to the fifth oil passage 1002, which is convenient for quickly disassembling and assembling the nozzle 11.

[0057] Furthermore, as Figure 6 shown, on the second side 7 of the slewing bearing, at least one annular groove 5011 is provided on the outer wall of the first sealing portion 501, and the annular grooves 5011 are evenly spaced along the length direction of the first sealing portion 501. Parameters such as the number and spacing of the annular grooves 5011 can be determined according to actual design requirements. It should be noted that in terms of the placement position of the slewing bearing as Figure 6 shown, Figure 6The left - right direction is the length direction of the first sealing part 501. In this way, lubricating grease can be stored in the annular groove 5011, so that when the sealing member 5 moves relative to the fourth sealing groove 202, it has a good lubrication condition, reducing the friction coefficient between the sealing member 5 and the contact surface, reducing wear caused by friction, and prolonging the service life of the sealing member 5.

[0058] With such a setting, it is convenient to arrange the second oil passage 10 and the oil nozzle 11, rationally layout the lubrication structure of the sealing oil groove. At the same time, the fourth sealing groove 202 can be regularly refueled through the oil nozzle 11 to keep the internal lubrication condition of the sealing oil groove good, and improve the service life of the sealing member 5.

[0059] Combining the above - mentioned various embodiments, the present invention provides a new type of slewing bearing structure, which is suitable for construction machinery such as excavators, cranes, loaders, etc. The slewing bearing includes an inner ring 1, an outer ring 2, rolling elements 3, a sealing member 5, a first oil passage 8, a plugging member 9, a second oil passage 10, and an oil nozzle 11. Among them, as Figure 1 shown, there are two sealing members 5, which are respectively arranged on the first side 6 and the second side 7 of the slewing bearing. In this way, a complete closed space is formed between the inside of the raceway, the gap 4 between the inner ring 1 and the outer ring 2, and the sealing members 5, which can effectively prevent sundries such as dust and moisture from entering the inside of the raceway, thereby optimizing the lubrication performance of the slewing bearing and improving the service life of the slewing bearing.

[0060] Specifically, as Figure 1 shown, on the second side 7 of the slewing bearing, one end of the sealing member 5 is fixed in the third sealing groove 102 on the end face of the inner ring 1, and the other end extends into the fourth sealing groove 202 on the side wall of the outer ring 2. And the fourth sealing groove 202 is connected to the second oil passage 10, and the fourth sealing groove 202 can be regularly refueled through the oil nozzle 11 to keep the lubrication of the sealing member 5. On the first side 6 of the slewing bearing, one end of the sealing member 5 is fixed in the first sealing groove 101 on the side wall of the inner ring 1, and the other end extends into the second sealing groove 201 on the end face of the outer ring 2. And the first sealing groove 101 is connected to the first oil passage 8, and the first oil passage 8 is connected to the gap 4. Since the inner ring 1 of the slewing bearing is connected to the base of the main machine and the installation space is limited, the lower sealing groove cannot use the oil nozzle 11 to achieve the lubrication function of regular refueling. Therefore, in this embodiment, the self - lubrication function of the lower sealing groove is realized through the first oil passage 8. In this way, the lubricating grease inside the raceway of the slewing bearing can flow from the gap 4 to the first sealing groove 101 under the action of gravity to realize the lubrication function of the sealing member 5. In addition, the lower end opening of the second oil passage 802 is axially sealed with a plugging member 9.

[0061] When the slewing bearing is working, the inner ring 1 remains fixed, and the outer ring 2 rotates relatively. One end of the seal 5 is fixed in the seal groove with a barb structure, and the other end can rotate relatively in the seal oil groove. Among them, the grease nipple 11 can supply lubricating grease to the upper seal oil groove, and the lower seal oil groove adopts a self-lubricating method. In this way, the upper and lower L-shaped sealing strips, the inside of the raceway, and the gap between the inner and outer rings form a complete closed space, which can effectively prevent sundries such as dust and moisture from entering the inside of the raceway, thereby extending the service life of the slewing bearing.

[0062] In summary, in this embodiment, the seal 5 is easy to install, forms a complete closed space, can effectively perform functions such as waterproofing and dustproofing, and the lower seal oil groove of the slewing bearing adopts a self-lubricating structure, effectively solving the problem of interference between the slewing bearing and the host base platform.

[0063] According to an embodiment of the present invention, on the other hand, an operating machine is also provided, including the slewing bearing in each of the above embodiments. Optionally, the operating machine is an excavator, a crane, a loader, etc. With such a setting, by inserting the two ends of the seal 5 into the inner ring 1 and the outer ring 2 respectively, so that the seal 5 reliably covers the gap 4 between the inner ring 1 and the outer ring 2, it can effectively prevent impurities such as dust and moisture from entering the inside of the slewing bearing, and the lubricating grease inside the slewing bearing can enter the first seal groove 101 from the gap 4 between the inner ring 1 and the outer ring 2 and the first oil passage 8 under the action of gravity to lubricate the seal 5, which can improve the sealing performance of the seal 5, thereby enhancing the reliability of the use of the seal 5, extending the service life of the slewing bearing, and ensuring the safe and stable operation of the equipment. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the above slewing bearing, so it will not be elaborated here.

[0064] Although the 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 such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A slewing bearing, characterized in that: include: An inner ring (1) and an outer ring (2) coaxially arranged with the inner ring (1), the inner ring (1) and the outer ring (2) being rotatably connected via a rolling body (3), and a gap (4) being provided between the inner ring (1) and the outer ring (2); a sealing member (5) arranged on a first side (6) of the slewing bearing, the first side (6) of the inner ring (1) being provided with a first sealing groove (101), the first side (6) of the outer ring (2) being provided with a second sealing groove (201), one end of the sealing member (5) being inserted into the first sealing groove (101) and the other end being inserted into the second sealing groove (201); A first oil passage (8) is arranged in the inner ring (1); one end of the first oil passage (8) is connected to the first sealing groove (101), and the other end of the first oil passage (8) is connected to the gap (4).

2. The slewing bearing according to claim 1, characterized in that: The first sealing groove (101) is arranged along the radial direction of the inner ring (1), and the first oil passage (8) comprises: A first oil passage (801) is arranged along the radial direction of the inner ring (1), and one end of the first oil passage (801) is connected to the first sealing groove (101); a second oil passage (802) arranged along the axial direction of the inner ring (1), one end of the second oil passage (802) being connected to the other end of the first oil passage (801); The third oil channel (803) is arranged along the radial direction of the inner ring (1). The third oil channel (803) is located above the first oil channel (801), and the other end of the second oil channel (802) is connected to one end of the third oil channel (803), and the other end of the third oil channel (803) is connected to the gap (4).

3. The slewing bearing according to claim 2, characterized in that: One end of the second oil passage (802) connected to the first oil passage (801) passes through the end face of the inner ring (1), and the slewing bearing also includes a sealing member (9) adapted to the second oil passage (802), and the sealing member (9) is suitable for covering the opening of the second oil passage (802).

4. The slewing bearing according to any one of claims 1 to 3, characterized in that: The sealing member (5) comprises a first sealing portion (501) and a second sealing portion (502) which are arranged at an angle, wherein one of the first sealing portion (501) and the second sealing portion (502) is inserted into the first sealing groove (101), and the other is inserted into the second sealing groove (201).

5. The slewing bearing according to claim 4, characterized in that: The outer wall of the first sealing portion (501) is provided with at least one annular groove (5011), and the annular grooves (5011) are arranged at intervals along the length direction of the first sealing portion (501). On the first side (6) of the slewing bearing, the first sealing portion (501) is inserted into the first sealing groove (101).

6. The slewing bearing according to claim 4, characterized in that: The end face of the second sealing portion (502) is provided with a protrusion (5021); on the first side (6) of the slewing bearing, the second sealing portion (502) is inserted into the second sealing groove (201); the second sealing groove (201) is provided with a slot section (2011) matching the protrusion (5021); the protrusion (5021) is snap-fitted into the slot section (2011).

7. The slewing bearing according to claim 4, characterized in that: The second side (7) of the slewing bearing is also provided with the sealing member (5), the second side (7) of the inner ring (1) is provided with a third sealing groove (102), the second side (7) of the outer ring (2) is provided with a fourth sealing groove (202), one end of the sealing member (5) is inserted into the third sealing groove (102), and the other end is inserted into the fourth sealing groove (202).

8. The slewing bearing according to claim 7, characterized in that: On the second side (7) of the slewing bearing, the first sealing portion (501) of the sealing member (5) is inserted into the fourth sealing groove (202), and the second sealing portion (502) of the sealing member (5) is inserted into the third sealing groove (102).

9. The slewing bearing according to claim 8, characterized in that: Also includes: A second oil passage (10) is arranged in the outer ring (2), one end of the second oil passage (10) is connected to the fourth sealing groove (202), the other end of the second oil passage (10) passes through the end surface of the outer ring (2), and an oil nozzle (11) is provided at the other end of the second oil passage (10).

10. A working machine, characterized in that: The invention comprises a slewing bearing as claimed in any one of claims 1 to 9.

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