Bearing plug sealing structure

Abstract

The utility model relates to a bearing plug sealing structure which is applied to the field of bearings and comprises a bearing outer ring, a plug hole is formed in the bearing outer ring, a plug matched with the plug hole is arranged in the plug hole, a plurality of sealing grooves are formed in the outer edge of the plug, and sealing rings matched with the sealing grooves are arranged in the sealing grooves. The sealing rings abut against the hole wall of the plug hole. The anti-leakage plug has the technical effects that the design of the multiple sealing grooves and the sealing rings can further enhance the anti-leakage capacity, if one sealing ring is cut off due to the influence of external force, leaked lubricating oil can still be intercepted by the remaining sealing ring, the sealing performance of the plug is guaranteed, and the service life of the plug is prolonged. The bearing can continuously keep a good lubrication state in the operation process, friction between the bearing inner ring and the bearing outer ring is reduced, and the service life of the crossed roller bearing is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a bearing plug sealing structure. Background Art

[0002] Crossed roller bearings are a special type of bearing with a split inner ring and a rotating outer ring. Its internal structure usually consists of two annular tracks with cylindrical rollers. The rollers on the tracks are arranged crosswise, and the axis of each roller is perpendicular to the axis of rotation of the bearing.

[0003] The crossed roller bearing includes a bearing outer ring and a bearing inner ring. Due to the special structure, a plug hole is opened on the bearing outer ring. The plug hole is a mounting hole set for the bearing to install the rolling element. After the roller is installed through the plug hole, the operator installs the plug into the plug hole to fix it, so that the bearing outer ring and the bearing inner ring are combined into an integral bearing.

[0004] The plug of the existing crossed roller bearing adopts a single sealing ring structure. During the installation process, the only sealing ring of the plug may be cut off by external force, causing oil leakage from the plug. The lubricating oil or grease inside the bearing will gradually decrease, resulting in a decrease in the lubrication effect, increasing the friction between the rolling element and the inner and outer rings, and accelerating the wear of the bearing. Summary of the invention

[0005] In order to help solve the problem that the single sealing ring in the existing cross roller bearing is easily cut off by external force, resulting in oil leakage from the plug and reduced lubrication effect, the present application provides a bearing plug sealing structure, which adopts the following technical solution: it includes a bearing outer ring, a plug hole is opened on the bearing outer ring, a plug matching the plug hole is arranged in the plug hole, a plurality of sealing grooves are opened on the outer edge of the plug, and sealing rings matching the sealing grooves are arranged in the plurality of sealing grooves, and the plurality of sealing rings are all tightly pressed against the hole wall of the plug hole.

[0006] Through the above technical solution, the design of multiple sealing grooves and sealing rings can further enhance the anti-leakage capability. If one of the sealing rings is cut off due to external force, the leaked lubricating oil can still be intercepted by the remaining sealing rings to ensure the sealing of the plug, so that the bearing can continue to maintain a good lubrication state during operation, reduce the friction between the inner ring and the outer ring of the bearing, and extend the service life of the cross roller bearing.

[0007] In a specific possible implementation manner, the plurality of sealing grooves are all annular sealing grooves.

[0008] Through the above technical solution, the structure of the annular sealing groove is relatively simple and easy to process and install. When the sealing ring is pressed into the annular sealing groove, a close contact is formed between the two, thereby effectively preventing the leakage of lubricating oil.

[0009] In a specific possible implementation manner, the cross-sections of several of the sealing rings are circular.

[0010] Through the above technical solution, the sealing ring with a circular cross-section deforms when subjected to pressure, can deform evenly and fill the sealing groove, thereby forming an effective seal, reducing the possibility of lubricating oil leakage in the cross roller bearing, and improving the sealing performance of the overall sealing ring.

[0011] In a specific possible implementation scheme, a positioning hole is opened on the outer ring of the bearing, a fixing pin matching the positioning hole is arranged in the positioning hole, and the fixing pin passes through the plug.

[0012] Through the above technical solution, the fixing pin plays a limiting role, and the position of the plug is fixed by the fixing pin, which reduces the possibility of deflection and displacement of the plug, thereby improving the sealing performance of the plug to the cross roller bearing.

[0013] In a specific possible implementation manner, the axis of the positioning hole is parallel to the central axis of the bearing outer ring.

[0014] In a specific possible implementation manner, when the number of the sealing grooves is two, the fixing pin is located between the two sealing grooves.

[0015] Through the above technical solution, two sealing grooves are arranged on the upper and lower sides of the fixing pin, so that the sealing rings are evenly distributed, thereby improving the sealing effect and efficiency of the plug.

[0016] In a specific possible implementation manner, the fixing pin is a spring pin.

[0017] Through the above technical solution, the spring pin uses the spring part inside it to play a buffering role, which can reduce the vibration and impact generated by the crossed roller bearing during operation, further reduce the possibility of the plug loosening and swinging, and improve the sealing of the plug to the crossed roller bearing.

[0018] In a specific possible implementation manner, the plug hole is a cylindrical through hole.

[0019] Through the above technical solution, the hole wall of the cylindrical through hole is a smooth arc, which reduces the possibility of leakage dead corners, improves the sealing of the plug and facilitates the removal of the plug.

[0020] In a specific possible implementation mode, a plurality of thread grooves are provided on the inner ring of the bearing.

[0021] Through the above technical solution, the threaded groove is used to facilitate the connection between the inner ring of the bearing and the external device, which increases the flexibility and improves the application range of the cross roller bearing.

[0022] In a specific implementation manner, the sealing ring is made of rubber material.

[0023] To summarize, the present application has the following beneficial technical effects: the design of multiple sealing grooves and sealing rings can further enhance the anti-leakage capability. If one of the sealing rings is cut off due to external force, the leaked lubricating oil can still be intercepted by the remaining sealing rings, ensuring the sealing of the plug, so that the bearing can continue to maintain a good lubrication state during operation, reducing the friction between the inner ring of the bearing and the outer ring of the bearing, and extending the service life of the cross roller bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the present application

[0025] Figure numerals: 1. bearing outer ring; 2. plug hole; 3. plug; 4. sealing groove; 5. sealing ring; 6. positioning hole; 7. fixing pin; 8. threaded groove. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 This application is described in further detail.

[0027] An embodiment of the present application discloses a bearing plug sealing structure.

[0028] Reference Figure 1 The sealing structure of the bearing plug 3 includes a bearing outer ring 1, and a plug hole 2 is opened on the bearing outer ring 1. In the embodiment of the present application, the plug hole 2 is a cylindrical through hole, and the hole wall of the cylindrical through hole is a smooth arc. The smooth arc hole wall not only significantly reduces the risk of leakage dead corners, greatly enhances the sealing performance of the plug 3, but also the smooth arc hole wall makes it easier to take the plug 3, thereby improving the convenience of operation.

[0029] Reference Figure 1 , a plug 3 matching the size of the plug hole 2 is provided in the plug hole 2, and a plurality of sealing grooves 4 are provided on the outer edge of the plug 3. In the embodiment of the present application, the number of sealing grooves 4 is two for illustration. Both sealing grooves 4 are annular sealing grooves 4, and both sealing grooves 4 are provided with sealing rings 5 ​​matching the size of the sealing grooves 4. In the embodiment of the present application, the sealing rings 5 ​​are made of rubber material, and the sealing rings 5 ​​made of rubber material have the advantages of good elasticity, wear resistance, high temperature resistance, corrosion resistance, good sealing performance, low friction and good shock absorption. The cross-sections of the sealing rings 5 ​​in the embodiment of the present application are both circular, and both sealing rings 5 ​​are tightly pressed against the hole wall of the plug hole 2. The sealing rings 5 ​​with circular cross-sections deform when subjected to pressure, and can deform evenly and fill the sealing grooves 4, thereby forming an effective seal, reducing the possibility of lubricating oil leakage in the cross roller bearing, and further improving the sealing performance of the overall sealing ring 5.

[0030] Therefore, the structure of the annular sealing groove 4 is relatively simple and easy to process and install. When the sealing ring 5 is pressed into the annular sealing groove 4, a close contact is formed between the two, thereby effectively preventing the leakage of lubricating oil.

[0031] Reference Figure 1 , a positioning hole 6 is provided on the outer ring 1 of the bearing. In the embodiment of the present application, the axis of the positioning hole 6 is parallel to the central axis of the outer ring 1 of the bearing. A fixing pin 7 matching the size of the positioning hole 6 is inserted into the positioning hole 6. The fixing pin 7 is located between the two sealing grooves 4 and the fixing pin 7 passes through the plug 3. The two sealing grooves 4 are arranged on the upper and lower sides of the fixing pin 7, so that the sealing ring 5 is evenly distributed, thereby improving the sealing effect and efficiency of the plug 3. The fixing pin 7 in the embodiment of the present application adopts a spring pin, which uses the spring part inside it to play a buffering role, can reduce the vibration and impact generated by the cross roller bearing during operation, further reduce the possibility of the plug 3 loosening and swinging, and improve the sealing performance of the plug 3 to the cross roller bearing.

[0032] Reference Figure 1 A plurality of thread grooves 8 are provided on the inner ring of the bearing, and the thread grooves 8 are used to facilitate the connection of the inner ring of the bearing with an external device, which increases the flexibility and improves the application range of the cross roller bearing.

[0033] The implementation principle of the embodiment of the present application is: the design of multiple sealing grooves 4 and sealing rings 5 ​​can further enhance the anti-leakage capability. If one of the sealing rings 5 ​​is cut off due to external force, the leaked lubricating oil can still be intercepted by the remaining sealing rings 5, ensuring the sealing of the plug 3, so that the bearing can continue to maintain a good lubrication state during operation, reduce the friction between the inner ring of the bearing and the outer ring 1 of the bearing, and extend the service life of the cross roller bearing.

[0034] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A bearing plug sealing structure, characterized in that: The invention comprises a bearing outer ring (1), wherein a plug hole (2) is provided on the bearing outer ring (1), a plug (3) matching the plug hole (2) is provided in the plug hole (2), a plurality of sealing grooves (4) are provided on the outer edge of the plug (3), a plurality of sealing grooves (4) are each provided with a sealing ring (5) matching the sealing groove (4), and the plurality of sealing rings (5) are each tightly pressed against the hole wall of the plug hole (2).

2. The bearing plug sealing structure according to claim 1, characterized in that: The plurality of sealing grooves (4) are all annular sealing grooves (4).

3. The bearing plug sealing structure according to claim 1, characterized in that: The cross sections of the plurality of sealing rings (5) are all circular.

4. The bearing plug sealing structure according to claim 1, characterized in that: The bearing outer ring (1) is provided with a positioning hole (6), a fixing pin (7) matching the positioning hole (6) is provided in the positioning hole (6), and the fixing pin (7) passes through the plug (3).

5. The bearing plug sealing structure according to claim 4, characterized in that: The axis of the positioning hole (6) is parallel to the central axis of the bearing outer ring (1).

6. The bearing plug sealing structure according to claim 4, characterized in that: When the number of the sealing grooves (4) is two, the fixing pin (7) is located between the two sealing grooves (4).

7. The bearing plug sealing structure according to claim 4, characterized in that: The fixing pin (7) is a spring pin.

8. The bearing plug sealing structure according to claim 1, characterized in that: The plug hole (2) is a cylindrical through hole.

9. The bearing plug sealing structure according to claim 1, characterized in that: A plurality of thread grooves (8) are provided on the inner ring of the bearing.

10. The bearing plug sealing structure according to claim 1, characterized in that: The sealing ring (5) is made of rubber material.

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