Combined sealing ring of hub bearing and machining method of combined sealing ring

Abstract

The invention discloses a hub bearing combined sealing ring and a machining method thereof.The hub bearing combined sealing ring comprises a first framework, a second framework and a third framework, the first framework comprises a first connecting part and a first sealing part which are horizontally arranged, and a sealing lip is arranged on the first sealing part; the second framework comprises a second connecting part and a second sealing part extending towards the outer diameter face of the transmission shaft, the third framework comprises a third connecting part and a third sealing part, one end of the third connecting part is fixedly connected with the third sealing part, and the other end of the third connecting part is welded to the end of the second connecting part. A gap groove is formed between the third sealing part and the first sealing part; in the welding process, the connecting position of the second connecting part and the third connecting part is welded through cold welding, the current of a welding machine is set to be 3-50 A, the pulse interval is 20-50 ms, and the welding speed is 300-800 mm / min; and after welding is completed, the temperature of the welding position is controlled to be 50-100 DEG C and kept for 30 min. And the structure is simple, the deformation is controllable, the stable operation of the structure is ensured, and the use effect is good.

Description

Technical Field

[0001] The invention relates to a combined sealing ring of a hub bearing and a processing method thereof. Background Art

[0002] CN206845714U and CN113847349 A respectively disclose an outer combined sealing ring of a wheel hub bearing, wherein the frame requires a larger space during the 360° reverse bending process, and a certain bending angle is required after the 360° bending to ensure that the deformation of the frame is controllable, does not affect the contact state of the sealing lip, and ensures the torque and sealing performance of the seal. However, this type of sealing structure cannot well prevent the influence of mud, sand and flying stones on the end face tooth connection of the end face spline wheel hub bearing during the driving process of the car, and an additional sealing structure is required, which leads to a bloated structure, complicated assembly, and affects the use effect of the structure. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a combined sealing ring of a hub bearing and a processing method thereof, which has a simple structure and controllable deformation, thereby ensuring stable operation of the structure. At the same time, it is convenient to process, has reliable connection, and has good use effect.

[0004] To achieve the above-mentioned purpose, the present invention provides a combined sealing ring of a hub bearing, including a first frame that cooperates with an outer ring and a second frame and a third frame that cooperate with an inner ring, the first frame including a first connecting portion and a first sealing portion that are horizontally arranged, the first sealing portion is provided with a sealing lip, the second frame including a second connecting portion that is attached to the inner ring and a second sealing portion that extends toward the outer diameter surface of the transmission shaft, the third frame including 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, and a gap groove is formed between the third sealing portion and the first sealing portion.

[0005] The beneficial effect of such an arrangement is as follows: such an arrangement reduces the difficulty of processing the metal skeleton by separating the second skeleton and the third skeleton. At the same time, the two are formed by welding to avoid uncontrollable deformation caused by direct bending of the metal skeleton. The welding method also strengthens the connection strength between the skeletons, and at the same time effectively extends the third skeleton outward to form a shield for the outer diameter surface of the drive shaft and the spline position, so that the components are more integrated, and the overall consistency is strong while ensuring the performance of the seal, which is convenient for factory production control and installation, and further simplifies the small inner ring structure in the original structure, which is convenient for production and processing, and improves production and processing efficiency.

[0006] As a further configuration 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 effect of this arrangement is that it further ensures the connection stability between the second frame and the third frame, avoids uncontrollable deformation caused by direct bending of the metal frame, and at the same time, the welding method strengthens the connection strength between the frames and extends the service life of the structure.

[0008] As a further configuration 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 effect of such arrangement is that such arrangement further improves the hydrophobic effect, prevents the entry of external liquid, and improves the reliability of the structure.

[0010] As a further configuration of the present invention, the first sealing portion is bent to form an arc-shaped groove, and the hydrophobic edge of the third sealing portion is extended into the arc-shaped groove.

[0011] The beneficial effect of such arrangement is that such arrangement further increases the difficulty of foreign materials entering the bearing, improves the stability of the structure in use, and at the same time, has a simple structure, convenient processing, and reliable use.

[0012] As a further configuration 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 a corresponding position of the arc groove and extends toward 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 toward the third sealing portion, and the third lip body extends toward the third connecting portion.

[0013] The beneficial effect of such arrangement is that, by adding a labyrinth-shaped sealing lip, the sealing effect of the structure is effectively improved, the hydrophobic effect is good, and the reliability of the structure is effectively improved.

[0014] As a further configuration of the present invention, a barrier lip is provided on the outer wall of the third sealing portion.

[0015] The beneficial effect of such arrangement is that such arrangement further improves the sealing effect of the structure, and at the same time the structure is simple, easy to implement, and has a good use effect.

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

[0017] The beneficial effect of such arrangement is that such arrangement can meet the use of wheel 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 wheel hub bearing, comprising the following steps: using a cold welding device to cold weld the connection position of the second connection part and the third connection part, the welding machine current is set to 3~50A, the pulse interval is 20~50ms, and the welding speed is 300~800mm / min; after welding is completed, the temperature of the welding position is controlled to be 50~100℃ and maintained for 30min.

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

[0020] The beneficial effects of this arrangement are: with this arrangement, cold welding has small deformation, low cost and is easy to control; while with argon arc welding, the temperature of argon arc welding is high, the deformation is large, and it is easy to penetrate the plate. This structure and process can effectively shield the end face splines of the hub bearing to form a combined application, avoid water entering the spline position, and reduce the closed structure of the small inner ring position, eliminating a component, improving production and processing efficiency, and can be installed in place in one go, with good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention; Figure 2 It is a structural schematic diagram of a second embodiment of the present invention; Figure 3 It is a structural schematic diagram of a third embodiment of the present invention; Figure 4 is a schematic structural diagram of a fourth embodiment of the present invention; DETAILED DESCRIPTION

[0022] like Figure 1The figure shows a first embodiment of a combined seal ring of a hub bearing, comprising a first frame for cooperating with an outer ring, and a second frame and a third frame for cooperating with an inner ring, wherein the first frame comprises a first connecting portion 11 and a first sealing portion 12 arranged horizontally, wherein the first sealing portion 12 is provided with a sealing lip, the second frame comprises a second connecting portion 21 attached to the inner ring and a second sealing portion 22 extending toward the outer diameter surface of the transmission shaft, the third frame comprises a third connecting portion 31 and a third sealing portion 32, wherein 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, and a gap groove is formed between the third sealing portion 32 and the first sealing portion 12. The free end of the third sealing portion 32 is bent to form a hydrophobic edge 33, wherein 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. The first sealing portion 12 is bent to form an arc groove 13, and the hydrophobic edge 33 of the third sealing portion 32 is extended 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 a position corresponding to the arc groove 13 and extends toward 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 toward the third sealing portion 32, and the third lip body 43 extends toward the third connecting portion 31. A stop lip 5 is arranged on the outer wall of the third sealing portion 32.

[0023] like Figure 2The second embodiment of the combined seal ring of the hub bearing is shown in the figure, which includes a first frame matched with the outer ring and a second frame and a third frame used to match with the inner ring. The first frame includes a first connecting portion 11 and a first sealing portion 12 arranged horizontally, and a sealing lip is arranged on the first sealing portion 12. The second frame includes a second connecting portion 21 attached to the inner ring and a second sealing portion 22 extending to the outer diameter surface of the transmission shaft. The third frame 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. The free end of the third sealing portion 32 is bent to form a hydrophobic edge 33, and the hydrophobic edge 33 is arranged parallel to the first connecting portion 11. A hydrophobic channel is formed between the hydrophobic edge 33 and the first connecting portion 11. The first sealing portion 12 is bent to form an arc groove 13, and the hydrophobic edge 33 of the third sealing portion 32 is extended 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 a position corresponding to the arc groove 13 and extends toward 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 toward the third sealing portion 32, and the third lip body 43 extends toward the third connecting portion 31. A stop lip 5 is arranged on the outer wall of the third sealing portion 32.

[0024] like Figure 3The third embodiment of the combined seal ring of the hub bearing is shown in the figure, which includes a first frame for matching with the outer ring and a second frame and a third frame for matching with the inner ring. The first frame includes a first connecting portion 11 and a first sealing portion 12 arranged horizontally, and a sealing lip is arranged on the first sealing portion 12. The second frame includes a second connecting portion 21 attached to the inner ring and a second sealing portion 22 extending toward the outer diameter surface of the transmission shaft. The third frame 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. The free end of the third sealing portion 32 is bent to form a hydrophobic edge 33. 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. The first sealing portion 12 is bent to form an arc groove 13, and the hydrophobic edge 33 of the third sealing portion 32 is extended 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 a position corresponding to the arc groove 13 and extends to 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 to the third sealing portion 32, and the third lip body 43 extends to the third connecting portion 31. A stop lip 5 is arranged on the outer wall of the third sealing portion 32. The second connecting portion 21 is bent.

[0025] like Figure 4The fourth embodiment of the combined seal ring of the hub bearing is shown in the figure, which includes a first frame matched with the outer ring and a second frame and a third frame used to match with the inner ring. The first frame includes a first connecting portion 11 and a first sealing portion 12 arranged horizontally, and a sealing lip is arranged on the first sealing portion 12. The second frame includes a second connecting portion 21 attached to the inner ring and a second sealing portion 22 extending to the outer diameter surface of the transmission shaft. The third frame 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. The free end of the third sealing portion 32 is bent to form a hydrophobic edge 33, and the hydrophobic edge 33 is arranged parallel to the first connecting portion 11. A hydrophobic channel is formed between the hydrophobic edge 33 and the first connecting portion 11. The first sealing portion 12 is bent to form an arc groove 13, and the hydrophobic edge 33 of the third sealing portion 32 is extended 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 a position corresponding to the arc groove 13 and extends to 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 to the third sealing portion 32, and the third lip body 43 extends to the third connecting portion 31. A stop lip 5 is arranged on the outer wall of the third sealing portion 32. The second connecting portion 21 is bent.

[0026] This embodiment also discloses a processing method for a combined sealing ring of a wheel hub bearing, comprising the following steps: using a cold welding device to cold weld the connection position of the second connection part and the third connection part, the welding machine current is set to 24A, the pulse interval is 29ms, and the welding speed is 460mm / min; after welding is completed, the temperature of the welding position is controlled to 80°C and maintained for 30 minutes.

[0027] Furthermore, the method also includes using argon gas protection and not filling welding wire during welding.

[0028] The beneficial effects of this arrangement are: with this arrangement, cold welding has small deformation, low cost and is easy to control; while with argon arc welding, the temperature of argon arc welding is high, the deformation is large, and it is easy to penetrate the plate. This structure and process can effectively shield the end face splines of the hub bearing to form a combined application, avoid water entering the spline position, and reduce the closed structure of the small inner ring position, eliminating a component, improving production and processing efficiency, and can be installed in place in one go, with good use effect.

[0029] The above examples are only several preferred specific examples of the present invention. Common changes 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 of a hub bearing, comprising a first frame for cooperating with an outer ring and a second frame and a third frame for cooperating with an inner ring, characterized in that: The first skeleton includes a first connecting portion and a first sealing portion which are arranged horizontally, and a sealing lip is arranged on the first sealing portion. The second skeleton includes a second connecting portion which is attached to the inner ring and a second sealing portion which extends toward 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.

2. The combined sealing ring of the hub bearing according to claim 1, characterized in that: One end of the third sealing portion connected to the third connecting portion is connected to the second connecting portion by spot welding.

3. The combined sealing ring of the hub bearing according to claim 2, characterized in that: 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.

4. The combined sealing ring of the hub bearing according to claim 3, characterized in that: The first sealing portion is bent to form an arc-shaped groove, and the hydrophobic edge of the third sealing portion extends into the arc-shaped groove.

5. The combined sealing ring of the hub bearing according to claim 4, characterized in that: 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 groove and extends toward the hydrophobic edge. The second lip body and the third lip body are both arranged at the edge of the first sealing part. The second lip body extends toward the third sealing part, and the third lip body extends toward the third connecting part.

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

7. The combined sealing ring of the hub bearing according to claim 1, characterized in that: The second connecting portion is bent.

8. A method for processing a combined seal ring of a hub bearing according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: using a cold welding device to cold weld the connection positions of the second connection part and the third connection part, the welding machine current is set to 3-50A, the pulse interval is 20-50ms, and the welding speed is 300-800mm / min; after the welding is completed, the temperature of the welding position is controlled to be 50-100°C and maintained for 30 minutes.

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

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