Three-row roller type slewing bearing

Abstract

The utility model belongs to the technical field of slewing bearings, and particularly relates to a slewing bearing with three rows of rollers, which comprises an upper outer ring, a lower outer ring, an inner ring and a sealing tape, a plurality of oil injection holes distributed at equal intervals are formed in the upper outer ring and the lower outer ring, communicating holes communicated with the oil injection holes are formed in the upper outer ring and the lower outer ring, and the inner ring is provided with a plurality of sealing tapes. A sealing plate used for sealing the bottom of the oil injection hole is installed on the lower outer ring, a vertical rod is fixedly connected to the top end of the sealing plate, and a butt joint plate is slidably connected to the outer wall of the vertical rod. During use, the connecting plate, the positioning ring and the connecting rod can be in butt joint with the bottom plate and the receding groove, so that the oil injection hole is sealed, can be separated in cooperation with the positioning ring and is supported by the spring, and therefore after oil is injected, residual oil in the oil injection hole can be pushed out through the butt joint plate and the bottom plate, and it is ensured that no sealing residue exists in the oil injection hole; in various use environments, a large amount of dust and the like are easy to enter, and the use of the device is influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to slewing ring technical field, concretely relates to a three-row roller type slewing ring. BACKGROUND

[0002] The existing three-row roller type slewing ring has many problems in the injection mode of lubricating grease and subsequent maintenance during actual use. Usually, the lubricating grease is injected through the oil injection hole arranged at a specific position of the slewing ring to ensure that the rollers and the raceway are fully lubricated, reduce friction and wear, and prolong the service life of the slewing ring. After each oil injection operation is completed, due to the structural characteristics of the oil injection hole and the viscosity of the grease, part of the lubricating grease will inevitably remain in the oil injection hole. With the passage of time, the remaining grease will gradually harden when exposed to the external environment for a long time. The hardened grease not only blocks the oil injection hole, making it difficult for the grease to flow smoothly into the lubricating part inside the slewing ring during subsequent oil injection, but also allows dust in the surrounding environment to easily enter the slewing ring through the oil injection hole. Once the dust particles enter, they will mix with the lubricating grease, forming a kind of abrasive material that exacerbates the wear between the rollers and the raceway. In severe cases, it may even cause the slewing ring to fail, greatly reducing the reliability and service life of the equipment. SUMMARY

[0003] The utility model provides a three-row roller type slewing ring, which has the characteristics of preventing the injected grease from hardening and blocking the oil injection hole, and preventing dust in the surrounding environment from easily entering the slewing ring through the oil injection hole.

[0004] The utility model provides the following technical scheme: including upper outer ring, lower outer ring, inner ring and sealing band, a plurality of equidistant distribution's oil injection hole are seted up on the upper outer ring and the lower outer ring, the upper outer ring and the lower outer ring are seted up with the intercommunication hole of intercommunication with the oil injection hole in, the upper outer ring and the lower outer ring inner wall are seted up with the oil discharge hole of intercommunication with the intercommunication hole, the lower outer ring is installed with the sealing plate for closing the bottom of oil injection hole, the sealing plate top end fixed connection has the vertical rod, the oil injection hole inner wall is connected with the positioning ring, the positioning ring inner wall is installed with the connecting plate corresponding with the vertical rod, the vertical rod outer wall sliding connection has the butt joint plate, the butt joint plate bottom end fixed connection has the bottom plate, the bottom plate and the sealing plate between through the spring connection.

[0005] Among them, a plurality of oil injection holes correspond to each other, and the oil discharge hole corresponds to the inner ring.

[0006] Among them, the sealing plate outer wall fixed connection has the support ring plate, and the oil injection hole inner wall and the sealing plate connection place are seted up with the support ring groove that the support ring plate is matched.

[0007] The connecting plate and the positioning ring are connected through a connecting rod, and a clearance slot is arranged on the top of the butt joint plate.

[0008] The inner wall of the oil injection hole is provided with a limiting slot, and a limiting rod is arranged on the inner wall of the oil injection hole.

[0009] The beneficial effect of the utility model is that when in use, the connecting plate, the positioning ring and the connecting rod can butt joint with the bottom plate and the clearance slot, so that the oil injection hole is sealed, and the positioning ring can be separated, so that the bottom plate and the butt joint plate slide down and are supported by the spring, so that after the oil is injected, the butt joint plate and the bottom plate can push out the residual oil in the oil injection hole, ensure that there is no sealing residual in the oil injection hole, avoid external contact, and in various use environments, a large amount of dust and the like can easily enter, and the use of the device is affected.

[0010] The parts not involved in the device are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0012] Figure 2 It is a three-dimensional structure schematic diagram of the upper outer ring in the utility model;

[0013] Figure 3 It is a sectional structure schematic diagram of the upper outer ring in the utility model;

[0014] Figure 4 It is a sectional structure schematic diagram of the upper outer ring in the utility model;

[0015] Figure 5 It is a three-dimensional structure schematic diagram of the utility model;

[0016] Figure 6 It is a sectional structure schematic diagram of the utility model.

[0017] In the drawing: 1, upper outer ring; 11, lower outer ring; 12, inner ring; 13, sealing band; 2, oil injection hole; 21, communication hole; 22, oil discharge hole; 23, sealing plate; 231, support ring plate; 24, support ring groove; 3, vertical rod; 31, connecting plate; 32, positioning ring; 33, connecting rod; 34, butt joint plate; 341, clearance slot; 35, bottom plate; 36, limiting rod; 361, limiting slot; 362, limiting block; 37, spring. DETAILED DESCRIPTION

[0018] Please refer toFigures 1-6 The utility model provides following technical scheme: including upper outer ring 1, lower outer ring 11, inner ring 12 and sealing band 13, a plurality of equidistance distribution oil injection hole 2 are seted up on upper outer ring 1 and lower outer ring 11, the communication hole 21 that is linked with oil injection hole 2 is seted up in upper outer ring 1 and lower outer ring 11, the oil discharge hole 22 that is linked with communication hole 21 is seted up in the inner wall of upper outer ring 1 and lower outer ring 11, the sealing plate 23 for closing the bottom of oil injection hole 2 is installed on lower outer ring 11, the sealing plate 23 top end fixedly connected has riser 3, the inner wall screw thread connection of oil injection hole 2 has locating ring 32, the inner wall of locating ring 32 is installed with the connecting plate 31 corresponding with riser 3, riser 3 outer wall slidingly connected has butt plate 34, butt plate 34 bottom end fixedly connected has bottom plate 35, and bottom plate 35 and sealing plate 23 are connected through spring 37.

[0019] In this embodiment: in use, the upper outer ring 1 and the lower outer ring 11 rotate on the outer wall of the inner ring 12, at this time the oil injection hole 2 opened on the outer wall of the upper outer ring 1 can be aligned with the nozzle of the grease gun, after the grease gun injects lubricating grease, at this time the grease can enter the communication hole 21 through the oil injection hole 2, and then be discharged to the rolling balls between the inner ring 12 and the upper outer ring 1 and the lower outer ring 11 through the oil discharge hole 22, thereby achieving the effect of lubrication. When injecting, the grease in the communication hole 21 connected with the oil discharge hole 22 can flow slowly to the position of the rolling balls under the continuous rotation of the upper outer ring 1 and the lower outer ring 11, so that the grease in the communication hole 21 can flow, and the grease in the oil injection hole 2 is difficult to flow, causing it to accumulate in the oil injection hole 2, which can cause the grease in the oil injection hole 2 to harden and cause blockage after a long time, which is not conducive to the injection of grease next time, thereby affecting the lubrication of the device. At this time, the vertical rod 3 installed on the inner wall of the oil injection hole 2 is supported at the bottom of the sealing plate 23, and the sealing plate 23 rotates on the inner wall of the oil injection hole 2. At this time, the vertical rod 3 can install the butt joint plate 34 and the bottom plate 35, so that the butt joint plate 34 and the bottom plate 35 are supported by the spring 37 connected between the butt joint plate 34 and the bottom plate 35 and the sealing plate 23, so that the butt joint plate 34 and the bottom plate 35 can be supported on the top of the oil injection hole 2. By connecting the connecting plate 31 and the positioning ring 32, the positioning ring 32 is connected and fixed on the inner wall of the oil injection hole 2. At this time, the sealing plate 23 can be rotated to make the supporting ring groove 24 correspond to the inner wall of the positioning ring 32, so that the butt joint plate 34 and the bottom plate 35 are connected with the connecting plate 31 and the positioning ring 32, and the device can seal the top of the oil injection hole 2 to prevent dust and other impurities from entering. When injecting, the connecting plate 31 and the positioning ring 32 are separated, and after separation, the grease gun can be used to inject oil, so that the butt joint plate 34 and the bottom plate 35 are pushed down by the extrusion spring 37, so that the grease can pass through the communication hole 21 and the oil discharge hole 22. When the oil injection is stopped, the butt joint plate 34 and the bottom plate 35 can be reset under the push of the spring 37, the connecting plate 31 and the positioning ring 32 are installed, the residual grease on the inner wall of the oil injection hole 2 can be pushed out, and the oil injection hole 2 is sealed to ensure that there is no residual seal in the oil injection hole 2. In order to facilitate the next injection of grease, avoid external contact, and in various use environments, a large amount of dust and other impurities can easily enter, affecting the use of the device.

[0020] The oil injection holes 2 correspond to each other, and the oil discharge holes 22 correspond to the inner ring 12; the oil injection holes 2 correspond to each other, so that the upper outer ring 1 and the lower outer ring 11 are connected in a top-to-bottom manner, ensuring that the oil injection holes 2 are connected in a top-to-bottom manner, thereby enabling the oil injection holes 2 to inject lubricating grease.

[0021] The outer wall of the sealing plate 23 is fixedly connected with a supporting ring plate 231, and a supporting ring groove 24 matched with the supporting ring plate 231 is arranged at the connecting position between the inner wall of the oil injection hole 2 and the sealing plate 23; the supporting ring plate 231 fixedly connected with the outer wall of the sealing plate 23 can be limited in the supporting ring groove 24 arranged at the inner wall of the oil injection hole 2, so that the sealing plate 23 can be installed and clamped at the bottom of the inner wall of the oil injection hole 2 and supported at the position of the bottom of the inner wall of the oil injection hole 2, thereby ensuring the installation of the sealing plate 23 on the vertical rod 3.

[0022] The connecting plate 31 and the positioning ring 32 are connected through the connecting rod 33, the top of the butt joint plate 34 is provided with a clearance groove 341 matched with the connecting rod 33; the connecting plate 31 and the positioning ring 32 are connected through the connecting rod 33, so that the connecting plate 31 and the connecting rod 33 are rotated in the inner wall of the positioning ring 32, thereby facilitating rotation, installation and separation of the positioning ring 32, the clearance groove 341 and the connecting rod 33 are matched, so that when the butt joint plate 34 moves upwards, the positioning ring 32, the connecting plate 31, the connecting rod 33 and the butt joint plate 34 can form a horizontal plane, thereby ensuring dust blocking.

[0023] The inner wall of the oil injection hole 2 is provided with a limiting groove 361, the inner wall of the oil injection hole 2 is provided with a limiting rod 36, the outer wall of the bottom plate 35 is fixedly connected with a limiting block 362 matched with the limiting groove 361, and the limiting rod 36 penetrates through the limiting block 362; the limiting groove 361 arranged at the inner wall of the oil injection hole 2 can limit the installation of the limiting rod 36, the limiting rod 36 penetrates through the limiting block 362, so that the limiting block 362 and the limiting rod 36 are connected and limited, thereby ensuring the vertical displacement of the butt joint plate 34 and the bottom plate 35, so that when the butt joint plate 34 moves upwards, the clearance groove 341 can be matched with the connecting rod 33, thereby ensuring dust blocking.

[0024] The working principle and use process of the utility model are as follows: in use, the positioning ring 32 is separated from the top of the inner wall of the oil injection hole 2, then the grease gun is used to inject lubricating oil into the oil injection hole 2, so that the butt joint plate 34 and the bottom plate 35 are pushed downwards by the spring 37, and the lubricating oil can pass through the communication hole 21 and the oil discharge hole 22; when the injection of oil is stopped, the butt joint plate 34 and the bottom plate 35 can be reset under the pushing of the spring 37, the connecting plate 31 and the positioning ring 32 are installed, the residual oil in the inner wall of the oil injection hole 2 can be pushed out, the oil injection hole 2 is sealed, and the inner wall of the oil injection hole 2 is not sealed, so that the next injection of oil can be carried out, and external contact is avoided; in various use environments, a large amount of dust and the like can easily enter, thereby affecting the use of the device.

Claims

1. A three-row roller slewing bearing comprising an upper outer ring (1), a lower outer ring (11), an inner ring (12) and a sealing band (13), characterized in that: The upper outer ring (1) and the lower outer ring (11) are provided with a plurality of oil injection holes (2) distributed at equal intervals, the upper outer ring (1) and the lower outer ring (11) are provided with a plurality of communication holes (21) in communication with the oil injection holes (2), the inner walls of the upper outer ring (1) and the lower outer ring (11) are provided with a plurality of oil discharge holes (22) in communication with the communication holes (21), the lower outer ring (11) is provided with a sealing plate (23) for sealing the bottom of the oil injection hole (2), the top end of the sealing plate (23) is fixedly connected with a vertical rod (3), the inner wall of the oil injection hole (2) is threadedly connected with a positioning ring (32), the inner wall of the positioning ring (32) is provided with a connecting plate (31) corresponding to the vertical rod (3), the outer wall of the vertical rod (3) is slidably connected with a butt plate (34), the bottom end of the butt plate (34) is fixedly connected with a bottom plate (35), and the bottom plate (35) and the sealing plate (23) are connected by a spring (37).

2. A three-row roller slewing bearing according to claim 1, characterized in that: A plurality of oil injection holes (2) correspond to each other, the oil discharge hole (22) corresponds to the inner ring (12).

3. A three-row roller slewing bearing according to claim 1, characterized in that: The outer wall of the sealing plate (23) is fixedly connected with a supporting ring plate (231), and the connecting portion between the inner wall of the oil injection hole (2) and the sealing plate (23) is provided with a supporting ring groove (24) matched with the supporting ring plate (231).

4. A three-row roller slewing bearing according to claim 1, characterized in that: The connecting plate (31) and the positioning ring (32) are connected by a connecting rod (33), and the top of the butt plate (34) is provided with a clearance groove (341) matched with the connecting rod (33).

5. A three-row roller slewing bearing according to claim 1, characterized in that: The inner wall of the oil injection hole (2) is provided with a limiting groove (361), the inner wall of the oil injection hole (2) is provided with a limiting rod (36), the outer wall of the bottom plate (35) is fixedly connected with a limiting block (362) matched with the limiting groove (361), and the limiting rod (36) penetrates through the limiting block (362).

Images