Self-lubricating slewing bearing

Abstract

The utility model discloses a self-lubricating slewing bearing, and belongs to the technical field of slewing bearings. An inner ring is arranged in the outer ring, inner insection is arranged on the inner side of the inner ring, a sealing ring set is arranged between the outer ring and the inner ring and comprises an upper ring and a lower ring, the upper ring and the lower ring are vertically arranged, an oil nozzle is arranged on the outer surface of the outer ring, and the front end of the oil nozzle is movably connected with an oil inlet pipe. The utility model solves the problems that the output quantity of lubricating oil is not easy to control in the prior art, and the smooth rotation of the bearing is influenced by the combination of the spilled oil of the bearing and peripheral dust for a long time, and utilizes the structure in the air hole of the sponge to store oil through the sponge and the oil absorption cotton matched with the sponge. Therefore, lubricating oil is evenly smeared on the surface when the rolling ball moves, the problem that oil spills easily in an original structure is avoided, the opening or closing state of an oil inlet is controlled by adjusting the distance between the oil nozzle and the oil inlet pipe, oil is conveyed into the oil storage groove through the oil guide channel during oil inlet, and meanwhile the possibility that the lubricating oil in the oil storage groove spills is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of slewing bearings, in particular to an automatically lubricated slewing bearing. Background Technique

[0002] A slewing bearing is composed of an inner ring, an outer ring, rolling elements, etc. It is a large bearing that can bear comprehensive loads and can simultaneously bear large axial, radial loads and overturning moments. It is an essential important transmission component for machinery that needs to make relative rotary motion between two objects and simultaneously bear axial force, radial force, and overturning moment.

[0003] A lubricated slewing support disclosed in the publication number CN202900995U includes an inner ring and an outer ring. A flange is provided on the outer side wall of the upper end of the inner ring, and a connection plate is provided on the side wall of the lower end of the outer ring. The outer ring is sleeved on the inner ring. A rolling element rotating groove is provided between the contact surfaces of the inner and outer rings. An oil storage ring is provided inside the rolling element rotating groove. Rolling elements are provided in the rolling element rotating groove. An oil injection nozzle is provided on the side wall of the outer ring, and an annular groove is provided on the outer wall of the inner ring. A sealing ring is installed in the annular groove. The structure of this patent is light and convenient to install, and is suitable for requirements of good stability.

[0004] The above-mentioned prior art solves the technical problems of poor stability and large load in the existing ones, which affect the service life. However, although there is a certain automatic lubrication structure in the existing slewing bearings, due to the difficulty in controlling the output amount of lubricating oil, it is easy to cause the problem that the oil overflows from the bearing and combines with the surrounding dust, which affects the smooth rotation of the bearing after a long time.

[0005] Therefore, an automatically lubricated slewing bearing is proposed for the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide an automatically lubricated slewing bearing to solve the problem that although there is a certain automatic lubrication structure in the existing slewing bearings as mentioned in the above background technique, due to the difficulty in controlling the output amount of lubricating oil, it is easy to cause the problem that the oil overflows from the bearing and combines with the surrounding dust, which affects the smooth rotation of the bearing after a long time.

[0007] To achieve the above purpose, the utility model provides the following technical solution: an automatically lubricated slewing bearing, including an outer ring, an inner ring is arranged inside the outer ring, an inner tooth pattern is arranged inside the inner ring, a sealing ring group is arranged between the outer ring and the inner ring. The sealing ring group includes an upper ring and a lower ring, and the upper ring and the lower ring are arranged up and down. An oil nozzle is arranged on the outer surface of the outer ring, and an oil inlet pipe is movably connected to the front end of the oil nozzle. The oil injection structure is divided into two parts: an oil nozzle and an oil inlet pipe, which is convenient for oil injection and closing the oil inlet when not injecting oil, so as to avoid the internal oil from spilling out during use.

[0008] Preferably, a first groove is provided on the inner side of the outer ring, and a second groove is provided on the outer surface of the inner ring. A plurality of rolling balls are arranged between the first groove and the second groove. A sponge for supplying oil is provided on the inner wall of the first groove. The sponge is in a ring shape and placed in the first groove. It can fit on the surface when the rolling balls are in use, and at the same time, it will not affect the movement of the outer ring and the inner ring.

[0009] Preferably, an oil storage tank is provided inside the outer ring for storing lubricating oil. Only regular refueling is required. Two oil absorbing cotton pieces are provided at the rear end of the sponge. The oil absorbing cotton passes through the outer ring and is placed in the oil storage tank. The oil absorbing cotton can quantitatively suck the oil in the oil storage tank into the sponge, avoiding the problem of oil spillage easily occurring in the original structure.

[0010] Preferably, the outer surface of the oil nozzle is provided with threads for connecting and moving with the inlet oil pipe. And by using the threads, the position of the inlet oil pipe inside the oil nozzle can be adjusted. The inlet oil pipe is divided into two parts, the front part of the inlet oil pipe is used for connecting with the threads to control the position of the inlet oil pipe. A third groove is provided inside the oil nozzle for the rear part of the inlet oil pipe to move inside.

[0011] Preferably, an opening is provided inside the inlet oil pipe, and an oil inlet is provided inside the opening. A limiting plate is provided at the rear end of the inlet oil pipe for restricting the movement inside the third groove. A oil guiding channel is provided inside the outer ring, and the front end of the oil guiding channel is connected to the third groove.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The sponge of the present utility model, and the oil absorbing cotton cooperating with it, can quantitatively suck the lubricating oil in the oil storage tank into the sponge, and use the structure inside the pores of the sponge itself to store oil, so as to evenly apply the lubricating oil on the surface when the rolling balls move, thus avoiding the problem of oil spillage easily occurring in the original structure;

[0014] 2. The oil nozzle and the inlet oil pipe of the present utility model control the opening or closing state of the oil inlet by adjusting the distance between the inlet oil pipe and the oil nozzle. When refueling, the lubricating oil is sent to the oil storage tank through the oil guiding channel, and at the same time, the possibility of the internal lubricating oil spilling out is avoided, and at the same time, dust is prevented from entering, causing blockage of the oil injection port and sedimentation in the internal oil storage tank, which affects the long-term use of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the outer surface of the slewing bearing of the present utility model;

[0016] Figure 2 is a schematic sectional structural diagram of the outer ring and the oil nozzle of the present utility model;

[0017] Figure 3 is of the present utility model Figure 2 Schematic enlarged structural diagram of Area A.

[0018] In the figure: 1. Outer ring; 101. First groove; 102. Oil storage tank; 10201. Oil guiding channel; 2. Inner ring; 201. Inner tooth pattern; 202. Second groove; 3. Seal ring group; 4. Oil inlet pipe; 401. Opening; 402. Oil inlet; 403. Limiting plate; 5. Oil nozzle; 501. Thread; 502. Third groove; 6. Ball; 7. Sponge; 701. Oil absorbing cotton. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] In order to solve the technical problem that although the existing slewing bearings also have a certain automatic lubrication structure, it is difficult to control the output amount of the lubricating oil, which easily causes oil spillage of the bearing and combines with the surrounding dust, affecting the smooth rotation of the bearing over time, please refer to Figures 1 to 3 , the following technical solutions are provided:

[0021] Embodiment 1

[0022] As Figure 1 and Figure 2 shown, an automatic lubricating slewing bearing of the present invention includes an outer ring 1;

[0023] Among them, an inner ring 2 is provided inside the outer ring 1, an inner tooth pattern 201 is provided on the inner side of the inner ring 2, a seal ring group 3 is provided between the outer ring 1 and the inner ring 2, the seal ring group 3 includes an upper ring and a lower ring, the upper ring and the lower ring are arranged up and down, an oil nozzle 5 is provided on the outer surface of the outer ring 1, the front end of the oil nozzle 5 is movably connected to an oil inlet pipe 4, and the oil injection structure is divided into two parts: the oil nozzle 5 and the oil inlet pipe 4, which is convenient for oil injection and closing the oil inlet when not injecting oil, avoiding the internal oil from spilling during use.

[0024] Embodiment 2

[0025] In order to ensure that the lubricating oil can be evenly applied to the rolling balls 6, a sponge 7 is provided;

[0026] Specifically, as Figure 2 shown, a first groove 101 is opened on the inner side of the outer ring 1, a second groove 202 is opened on the outer surface of the inner ring 2, a plurality of balls 6 are provided between the first groove 101 and the second groove 202, and a sponge 7 for supplying oil is provided on the inner wall of the first groove 101.

[0027] Among them, an oil storage tank 102 is provided inside the outer ring 1 for storing lubricating oil. Only regular refueling is required. Two oil-absorbing cotton pieces 701 are provided at the rear end of the sponge 7. The oil-absorbing cotton pieces 701 pass through the outer ring 1 and are placed inside the oil storage tank 102. The oil-absorbing cotton pieces 701 can quantitatively suck the oil in the oil storage tank 102 into the sponge 7, avoiding the problem of oil spillage that is prone to occur in the original structure.

[0028] Embodiment 3

[0029] Since the oil injection hole needs to be exposed outside and is also used during oil injection, it is easy to cause external leakage of the internal lubricating oil.

[0030] For the above problems, as Figure 3 shown, a thread 501 is provided on the outer surface of the oil nozzle 5 for connecting and moving the inlet oil pipe 4. And by using the thread 501, the position of the inlet oil pipe 4 inside the oil nozzle 5 can be adjusted. The inlet oil pipe 4 is divided into two parts, the front part of the inlet oil pipe 4 is used to connect with the thread 501 to control the position of the inlet oil pipe 4, and a groove three 502 is opened inside the oil nozzle 5 for the rear part of the inlet oil pipe 4 to move inside.

[0031] Specifically, an opening 401 is opened inside the inlet oil pipe 4, and an oil inlet 402 is opened inside the opening 401 for oil injection. A limiting plate 403 is provided at the rear end of the inlet oil pipe 4 for restricting the movement inside the groove three 502. A oil guiding channel 10201 is provided inside the outer ring 1. The front end of the oil guiding channel 10201 is connected to the groove three 502, and the rear end of the oil guiding channel 10201 is connected to the oil storage tank 102.

[0032] Working principle: When oil injection is required, the front half of the inlet oil pipe 4 is twisted based on the thread 501 on the outer surface of the oil nozzle 5. Since the inlet oil pipe 4 is divided into two parts and is movably connected, as Figure 3 shown, when the front half of the inlet oil pipe 4 rotates outward, it will drive the rear half of the inlet oil pipe 4 to move from the Figure 2 state to the Figure 3 state, making the oil inlet 402 correspond to the upper opening of the oil guiding channel 10201. At this time, the front end of the filling oil pipe is inserted into the opening 401 to start oil injection. When the lubricating oil is injected into the oil storage tank 102, the oil-absorbing cotton pieces 701 can quantitatively suck the oil in the oil storage tank 102 into the sponge 7. Since the sponge 7 stores oil through the structure of the pores inside itself, the lubricating oil adheres to the surface of the sponge 7. When the rolling ball 6 rolls and moves, through mutual friction, the lubricating oil is evenly smeared on the surface of the rolling ball 6, avoiding oil spillage that is prone to occur in the original structure and increasing the smoothness of the bearing during use to a certain extent.

[0033] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0034] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An automatic lubrication slewing bearing, characterized in that, It includes an outer ring (1), an inner ring (2) is provided inside the outer ring (1), an inner tooth pattern (201) is provided on the inner side of the inner ring (2), a seal ring group (3) is provided between the outer ring (1) and the inner ring (2), the seal ring group (3) includes an upper ring and a lower ring, the upper ring and the lower ring are arranged up and down, an oil nozzle (5) is provided on the outer surface of the outer ring (1), and an oil inlet pipe (4) is movably connected to the front end of the oil nozzle (5).

2. The automatic lubricating slewing bearing according to claim 1, wherein: A first groove (101) is formed on the inner side of the outer ring (1), a second groove (202) is formed on the outer surface of the inner ring (2), a plurality of rolling balls (6) are provided between the first groove (101) and the second groove (202), and a sponge (7) for supplying oil is provided on the inner wall of the first groove (101).

3. The automatic lubricating slewing bearing according to claim 1, characterized in that: An oil storage tank (102) is provided inside the outer ring (1), two oil absorption cottons (701) are provided at the rear end of the sponge (7), and the oil absorption cottons (701) pass through the outer ring (1) and are placed inside the oil storage tank (102).

4. An automatic lubricating slewing bearing according to claim 1, characterized in that: Threads (501) are provided on the outer surface of the oil nozzle (5), the oil inlet pipe (4) is divided into a front part and a rear part, the front part of the oil inlet pipe (4) is used for connecting with the threads (501), and a third groove (502) is formed inside the oil nozzle (5).

5. The automatic lubricating slewing bearing according to claim 4, wherein: An opening (401) is formed inside the oil inlet pipe (4), an oil inlet (402) is formed inside the opening (401), a limiting plate (403) is provided at the rear end of the oil inlet pipe (4), and an oil guiding channel (10201) is provided inside the outer ring (1), and the front end of the oil guiding channel (10201) is connected to the third groove (502).

Images