Combined seal ring for hub bearing and its processing method

Abstract

The present invention discloses a combined sealing ring for a hub bearing and a processing method thereof. The sealing ring includes a first skeleton, a second skeleton and a third skeleton. The first skeleton includes a horizontally arranged first connecting portion and a first sealing portion. A sealing lip is arranged on the first sealing portion. The second skeleton includes a second connecting portion and a second sealing portion extending towards the outer diameter surface of the transmission shaft. The third skeleton includes a third connecting portion and a third sealing portion. One end of the third connecting portion is fixedly connected to the third sealing portion, and the other end is welded to the end of the second connecting portion. A gap groove is formed between the third sealing portion and the first sealing portion. The welding process uses cold welding to weld the connection position of the second connecting portion and the third connecting portion. The welding machine current is set to 3 - 50 A, the pulse interval is 20 - 50 ms, and the welding speed is 300 - 800 mm / min. After welding, the temperature of the welding position is controlled to be 50 - 100 °C and maintained for 30 min. Its structure is simple, the deformation amount is controllable, ensuring the stable operation of the structure, and having good use effects.

Description

Technical Field

[0001] The present invention relates to a combined seal ring for a hub bearing and a processing method thereof. Background Art

[0002] CN206845714U and CN113847349 A respectively disclose an outer combined seal ring for a hub bearing. Its skeleton requires a larger space during the 360° reverse bending process, and a certain bending angle needs to be formed after the 360° bending to ensure that the deformation of the skeleton is controllable, without affecting the contact state of the sealing lip, and ensuring the torque and sealing performance of the seal. However, such a sealing structure cannot well avoid the influence of sediment and flying stones during vehicle driving on the connection of the end face teeth of the end face spline hub bearing, and an additional sealing structure needs to be added, resulting in a bloated structure, cumbersome assembly, and affecting the use effect of the structure. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a combined seal ring for a hub bearing and a processing method thereof, which has a simple structure, controllable deformation amount, ensures the stable operation of the structure, is convenient to process, has reliable connection, and has good use effect.

[0004] To achieve the above object, the present invention provides a combined seal ring for a hub bearing, including a first skeleton for cooperating with the outer ring, a second skeleton and a third skeleton for cooperating with the inner ring. The first skeleton includes a horizontally arranged first connecting portion and a first sealing portion, and a sealing lip is arranged on the first sealing portion. The second skeleton includes a second connecting portion attached to the inner ring and a second sealing portion extending towards the outer diameter surface of the transmission shaft. The third skeleton includes a third connecting portion and a third sealing portion. One end of the third connecting portion is fixedly connected to the third sealing portion, and the other end is welded to the end of the second connecting portion. A gap groove is formed between the third sealing portion and the first sealing portion.

[0005] The beneficial effect of such a setting is as follows: By setting the second skeleton and the third skeleton separately, the processing difficulty of the metal skeleton is reduced. At the same time, the two are formed by welding, avoiding the uncontrollable deformation generated by directly bending the metal skeleton. The welding method also strengthens the connection strength between the skeletons, and effectively extends the third skeleton outwards to form a shield for the outer diameter surface of the transmission shaft and the spline position, making the component integrity better. While ensuring the performance of the seal, the overall consistency is strong, which is convenient for factory production control and installation. Further, the small inner ring structure in the original structure is simplified, facilitating production and processing and improving production and processing efficiency.

[0006] As a further setting of the present invention, one end of the third sealing portion connected to the third connecting portion is connected to the second connecting portion by spot welding.

[0007] The beneficial effects of such a setting are as follows: By setting in this way, the connection stability between the second skeleton and the third skeleton is further ensured, and the uncontrollable deformation caused by directly bending the metal skeleton is avoided. At the same time, the welding method strengthens the connection strength between the skeletons and extends the service life of the structure.

[0008] As a further setting of the present invention, the free end of the third sealing portion is bent to form a hydrophobic edge, the hydrophobic edge is arranged parallel to the first connecting portion, and a hydrophobic channel is formed between the hydrophobic edge and the first connecting portion.

[0009] The beneficial effects of such a setting are as follows: By setting in this way, the hydrophobic effect is further improved, preventing external liquid from entering and improving the reliability of the structure in use.

[0010] As a further setting of the present invention, an arc-shaped groove is formed by bending on the first sealing portion, and the hydrophobic edge of the third sealing portion extends into the arc-shaped groove.

[0011] The beneficial effects of such a setting are as follows: By setting in this way, the difficulty for external materials to enter the bearing is further increased, improving the stability of the structure in use. At the same time, the structure is simple, the processing is convenient, and the use is reliable.

[0012] As a further setting of the present invention, the sealing lip includes a first lip body, a second lip body and a third lip body. The first lip body is arranged at the corresponding position of the arc-shaped groove and extends towards the hydrophobic edge. The second lip body and the third lip body are both arranged at the edge of the first sealing portion. The second lip body extends towards the third sealing portion, and the third lip body extends towards the third connecting portion.

[0013] The beneficial effects of such a setting are as follows: By setting in this way, the sealing lip in the form of a labyrinth is increased, effectively improving the sealing effect of the structure, having a good hydrophobic effect, and effectively improving the reliability of the structure in use.

[0014] As a further setting of the present invention, a retaining lip is arranged on the outer wall of the third sealing portion.

[0015] The beneficial effects of such a setting are as follows: By setting in this way, the sealing effect of the structure is further improved. At the same time, the structure is simple, easy to implement, and has a good use effect.

[0016] As a further setting of the present invention, the second connecting portion is bent.

[0017] The beneficial effects of such a setting are as follows: By setting in this way, it can meet the use of hub bearings of different specifications, ensure that it can fit on the outer wall of the inner ring, and improve the assembly stability of the structure.

[0018] The present invention also discloses a processing method for a combined sealing ring of a hub bearing, including the following steps: cold welding is performed on the connection position between the second connecting portion and the third connecting portion by using a cold welding device, the welding machine current is set to 3 - 50 A, the pulse interval is 20 - 50 ms, and the welding speed is 300 - 800 mm / min; after welding is completed, the temperature of the welding position is controlled to be 50 - 100 °C and maintained for 30 min.

[0019] Further, the method further includes using argon gas protection and not filling welding wire during welding.

[0020] The beneficial effects of such a setting are as follows: with such a setting, cold welding has small deformation, low cost, and is easy to control; while using argon arc welding, the temperature of argon arc welding is high, the deformation is large, and it is also easy to penetrate the plate. By adopting this structure and process, the spline at the end face of the hub bearing can be effectively shielded to form a combined application, avoiding water ingress at the spline position. By reducing the closed structure at the small inner ring position, one component is eliminated, improving the production and processing efficiency, and it can be installed in place at one time, having a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the second embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the third embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the fourth embodiment of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Such as Figure 1As shown, it is the first implementation mode of the combined sealing ring of the hub bearing, including a first skeleton cooperating with the outer ring, a second skeleton and a third skeleton for cooperating with the inner ring. The first skeleton includes a horizontally arranged first connecting portion 11 and a first sealing portion 12. A sealing lip is provided on the first sealing portion 12. The second skeleton includes a second connecting portion 21 attached to the inner ring and a second sealing portion 22 extending towards the outer diameter surface of the transmission shaft. The third skeleton includes a third connecting portion 31 and a third sealing portion 32. One end of the third connecting portion 31 is fixedly connected to the third sealing portion 32, and the other end is welded to the end of the second connecting portion 21. A gap groove is formed between the third sealing portion 32 and the first sealing portion 12. A hydrophobic edge 33 is formed by bending the free end of the third sealing portion 32. The hydrophobic edge 33 is arranged parallel to the first connecting portion 11, and a hydrophobic channel is formed between the hydrophobic edge 33 and the first connecting portion 11. An arc groove 13 is formed by bending on the first sealing portion 12, and the hydrophobic edge 33 of the third sealing portion 32 extends into the arc groove 13. The sealing lip includes a first lip body 41, a second lip body 42 and a third lip body 43. The first lip body 41 is arranged at the corresponding position of the arc groove 13 and extends towards the hydrophobic edge. The second lip body 42 and the third lip body 43 are both arranged at the edge of the first sealing portion 12. The second lip body 42 extends towards the third sealing portion 32, and the third lip body 43 extends towards the third connecting portion 31. A retaining lip 5 is provided on the outer wall of the third sealing portion 32.

[0026] As Figure 2As shown, it is the second embodiment of the combined seal ring of the hub bearing, including a first skeleton that fits with the outer ring, and a second skeleton and a third skeleton that are used to fit with the inner ring. The first skeleton includes a horizontally arranged first connecting portion 11 and a first sealing portion 12. A sealing lip is arranged on the first sealing portion 12. The second skeleton includes a second connecting portion 21 attached to the inner ring and a second sealing portion 22 extending towards the outer diameter surface of the transmission shaft. The third skeleton includes a third connecting portion 31 and a third sealing portion 32. One end of the third connecting portion 31 is fixedly connected to the third sealing portion 32, and the other end is welded to the end of the second connecting portion 21. A gap groove is formed between the third sealing portion 32 and the first sealing portion 12. One end of the third sealing portion 32 connected to the third connecting portion 31 is connected to the second connecting portion 21 by spot welding. A hydrophobic edge 33 is formed by bending the free end of the third sealing portion 32. The hydrophobic edge 33 is arranged parallel to the first connecting portion 11, and a hydrophobic channel is formed between the hydrophobic edge 33 and the first connecting portion 11. An arc groove 13 is formed by bending on the first sealing portion 12, and the hydrophobic edge 33 of the third sealing portion 32 extends into the arc groove 13. The sealing lip includes a first lip body 41, a second lip body 42, and a third lip body 43. The first lip body 41 is arranged at the corresponding position of the arc groove 13 and extends towards the hydrophobic edge. The second lip body 42 and the third lip body 43 are both arranged at the edge of the first sealing portion 12. The second lip body 42 extends towards the third sealing portion 32, and the third lip body 43 extends towards the third connecting portion 31. A retaining lip 5 is arranged on the outer wall of the third sealing portion 32.

[0027] As Figure 3As shown, it is the third implementation mode of the combined sealing ring of the hub bearing, including a first skeleton that fits with the outer ring, and a second skeleton and a third skeleton that are used to fit with the inner ring. The first skeleton includes a horizontally arranged first connecting portion 11 and a first sealing portion 12. A sealing lip is arranged on the first sealing portion 12. The second skeleton includes a second connecting portion 21 attached to the inner ring and a second sealing portion 22 extending towards the outer diameter surface of the transmission shaft. The third skeleton includes a third connecting portion 31 and a third sealing portion 32. One end of the third connecting portion 31 is fixedly connected to the third sealing portion 32, and the other end is welded to the end of the second connecting portion 21. A gap groove is formed between the third sealing portion 32 and the first sealing portion 12. A hydrophobic edge 33 is formed by bending the free end of the third sealing portion 32. The hydrophobic edge 33 is arranged parallel to the first connecting portion 11, and a hydrophobic channel is formed between the hydrophobic edge 33 and the first connecting portion 11. An arc groove 13 is formed by bending on the first sealing portion 12. The hydrophobic edge 33 of the third sealing portion 32 extends into the arc groove 13. The sealing lip includes a first lip body 41, a second lip body 42, and a third lip body 43. The first lip body 41 is arranged at the corresponding position of the arc groove 13 and extends towards the hydrophobic edge. The second lip body 42 and the third lip body 43 are both arranged at the edge of the first sealing portion 12. The second lip body 42 extends towards the third sealing portion 32, and the third lip body 43 extends towards the third connecting portion 31. A retaining lip 5 is arranged on the outer wall of the third sealing portion 32. The second connecting portion 21 is bent.

[0028] As Figure 4As shown, this is the fourth embodiment of the combined seal ring for a hub bearing, which includes a first skeleton for fitting with the outer ring, and a second skeleton and a third skeleton for fitting with the inner ring. The first skeleton includes a horizontally arranged first connecting portion 11 and a first sealing portion 12. A sealing lip is provided on the first sealing portion 12. The second skeleton includes a second connecting portion 21 attached to the inner ring and a second sealing portion 22 extending towards the outer diameter surface of the transmission shaft. The third skeleton includes a third connecting portion 31 and a third sealing portion 32. One end of the third connecting portion 31 is fixedly connected to the third sealing portion 32, and the other end is welded to the end of the second connecting portion 21. A gap groove is formed between the third sealing portion 32 and the first sealing portion 12. One end of the third sealing portion 32 connected to the third connecting portion 31 is connected to the second connecting portion 21 by spot welding. A hydrophobic edge 33 is formed by bending the free end of the third sealing portion 32. The hydrophobic edge 33 is arranged parallel to the first connecting portion 11, and a hydrophobic channel is formed between the hydrophobic edge 33 and the first connecting portion 11. An arc groove 13 is formed by bending on the first sealing portion 12, and the hydrophobic edge 33 of the third sealing portion 32 extends into the arc groove 13. The sealing lip includes a first lip body 41, a second lip body 42, and a third lip body 43. The first lip body 41 is arranged at the corresponding position of the arc groove 13 and extends towards the hydrophobic edge. The second lip body 42 and the third lip body 43 are both arranged at the edge of the first sealing portion 12. The second lip body 42 extends towards the third sealing portion 32, and the third lip body 43 extends towards the third connecting portion 31. A retaining lip 5 is provided on the outer wall of the third sealing portion 32. The second connecting portion 21 is bent.

[0029] This embodiment also discloses a processing method for the combined seal ring of a hub bearing, which includes the following steps: using a cold welding device to perform cold welding on the connection position of the second connecting portion and the third connecting portion, setting the welding machine current to 24A, the pulse interval to 29ms, and the welding speed to 460mm / min; after welding, controlling the temperature at the welding position to be 80°C and maintaining it for 30 minutes.

[0030] Furthermore, this method also includes using argon gas protection and not filling the welding wire during welding.

[0031] The beneficial effects of such a setting are as follows: With such a setting, cold welding has small deformation, low cost, and is easy to control; while using argon arc welding, the temperature of argon arc welding is high, the deformation is large, and it is also easy to penetrate the plate. By adopting this structure and process, it can effectively shield the spline on the end face of the hub bearing, form a combined application, avoid water ingress at the spline position, improve the production and processing efficiency by reducing the closed structure at the small inner ring position, eliminating one component, and can be installed in place at one time, with good usage effects.

[0032] The above examples are only several preferred specific examples of the present invention, and the ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A combined sealing ring for a hub bearing, comprising a first skeleton cooperating with an outer ring, and a second skeleton and a third skeleton for cooperating with an inner ring, characterized in that: The first skeleton includes a horizontally arranged first connecting portion and a first sealing portion. A sealing lip is provided on the first sealing portion. The second skeleton includes a second connecting portion attached to the inner ring and a second sealing portion extending towards the outer diameter surface of the transmission shaft. The third skeleton includes a third connecting portion and a third sealing portion. One end of the third connecting portion is fixedly connected to the third sealing portion, and the other end is welded to the end of the second connecting portion. A clearance groove is formed between the third sealing portion and the first sealing portion. One end of the third sealing portion connected to the third connecting portion is connected to the second connecting portion by spot welding.

2. The combined sealing ring of the hub bearing according to claim 1, wherein: A hydrophobic edge is formed by bending the free end of the third sealing portion. The hydrophobic edge is arranged parallel to the first connecting portion, and a hydrophobic channel is formed between the hydrophobic edge and the first connecting portion.

3. The combined seal ring of the hub bearing according to claim 2, characterized in that: An arc-shaped groove is formed by bending on the first sealing portion. The hydrophobic edge of the third sealing portion extends into the arc-shaped groove.

4. The combined seal ring of the hub bearing according to claim 3, wherein: The sealing lip includes a first lip body, a second lip body, and a third lip body. The first lip body is arranged at a corresponding position of the arc-shaped groove and extends towards the hydrophobic edge. The second lip body and the third lip body are both arranged at the edge of the first sealing portion. The second lip body extends towards the third sealing portion, and the third lip body extends towards the third connecting portion.

5. The combined sealing ring of the hub bearing according to claim 1, characterized in that: A retaining lip is provided on the outer wall of the third sealing portion.

6. The combined seal ring of the hub bearing according to claim 1, wherein: The second connecting portion is bent.

7. The processing method of the combined sealing ring of the hub bearing according to any one of claims 1 to 6, characterized in that: The method includes the following steps: cold welding the connection position between the second connecting portion and the third connecting portion by using a cold welding device. The welding machine current is set to 3 - 50 A, the pulse interval is 20 - 50 ms, and the welding speed is 300 - 800 mm / min. After welding, control the temperature of the welding position to be 50 - 100 °C and keep it for 30 min.

8. The processing method of the combined sealing ring of the hub bearing according to claim 7, characterized in that: Argon protection is adopted, and no welding wire is filled during welding.

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