Automobile wheel hub bearing assembly method

Abstract

The application provides an automobile wheel hub bearing assembly method, which comprises the following steps: step 1: measuring the axial clearance of a double-row tapered roller bearing, and grinding the small end face of the second inner ring to make the axial clearance qualified when the axial clearance of the double-row tapered roller bearing is large; step 2: after the axial clearance of the double-row tapered roller bearing is qualified, measuring the axial clearance of a four-point ball bearing, and grinding the small end face size of the third inner ring and the fourth inner ring to make the axial clearance of the four-point ball bearing qualified when the axial clearance of the four-point ball bearing is large; and step 3: after the first tapered roller inner ring assembly, the second tapered roller inner ring assembly and the four-point ball bearing inner ring assembly are assembled into the outer ring, measuring the height of the automobile wheel hub bearing, and grinding the large end face of the fourth inner ring to make the height of the automobile wheel hub qualified when the height of the automobile wheel hub bearing is large. The method is convenient to measure and high in accuracy, and can ensure the smooth production of the automobile wheel hub bearing.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to a method for assembling automotive wheel hub bearings. Background Technology

[0002] like Figure 1 The aforementioned automotive wheel hub bearing consists of a double-row tapered roller bearing and a single-row four-point contact ball bearing, with both bearings sharing a common outer ring. Control parameters: The axial clearance of both the double-row tapered roller bearing and the four-point contact ball bearing must be greater than zero. However, national and industry standards do not specify a method for detecting the axial clearance of this bearing structure. To ensure the smooth production of this automotive wheel hub bearing, it is urgent to research a method for assembling the axial clearance of such bearings. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a method for assembling automotive wheel hub bearings, which provides a feasible measurement and adjustment method for assembling automotive wheel hub bearings, and the measurement is convenient and highly accurate.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for assembling automotive wheel hub bearings, comprising a double-row tapered roller bearing and a row of four-point contact ball bearings arranged back-to-back, wherein the double-row tapered roller bearing and the four-point ball bearing share a common outer ring. The double-row tapered roller bearing includes a first tapered roller inner ring assembly and a second tapered roller inner ring assembly disposed within the outer ring. The first tapered roller inner ring assembly includes a first inner ring and a first tapered roller disposed between the first inner ring and the outer ring via a first cage. The second tapered roller inner ring assembly includes a second inner ring and a second tapered roller disposed between the second inner ring and the outer ring via a second cage. The four-point contact ball bearing includes a four-point ball bearing inner ring assembly disposed within the outer ring. The four-point ball bearing inner ring assembly includes a third inner ring and a fourth inner ring arranged side-by-side, and steel balls disposed between the third inner ring, the fourth inner ring, and the outer ring via a third cage. The third inner ring is located closer to the second inner ring. The method for assembling automotive wheel hub bearings includes the following steps:

[0006] Step 1: Measure the axial clearance of the double-row tapered roller bearing and determine whether the axial clearance of the double-row tapered roller bearing is qualified. When the axial clearance of the double-row tapered roller bearing is large, grind the small end face of the second inner ring to make it qualified.

[0007] Step 2: After the axial clearance of the double-row tapered roller bearing is qualified, measure the axial clearance of the four-point ball bearing and determine whether the axial clearance of the four-point ball bearing is qualified. When the axial clearance of the four-point ball bearing is large, the axial clearance of the four-point ball bearing is qualified by grinding the small end face dimensions of the third inner ring and the fourth inner ring.

[0008] Step 3: After the axial clearance of the four-point ball bearing is qualified, assemble the first tapered roller inner ring assembly, the second tapered roller inner ring assembly, and the four-point ball bearing inner ring assembly into the outer ring. Measure the height of the automotive wheel hub bearing and determine whether the height of the automotive wheel hub bearing is qualified. If the height of the automotive wheel hub bearing is too large, grind the large end face of the fourth inner ring to make the automotive wheel hub height qualified.

[0009] Further, measuring the axial clearance of the double-row tapered roller bearing in step 1 includes the following steps: measuring the vertical distance AB between the A end face of the outer ring and the B end face of the outer ring, wherein the A end face of the outer ring is the end face closer to the side of the four-point contact ball bearing.

[0010] Place the first tapered roller inner ring assembly on the first support block and measure the overall height DO1 of the first tapered roller inner ring assembly and the first support block; then install the outer ring on the first tapered roller inner ring assembly and measure the overall height AO1 of the first support block and the outer ring; calculate the vertical distance AD ​​between the small end face of the first inner ring and the A end face of the outer ring, AD = AO1 - DO1;

[0011] Place the second tapered roller inner ring assembly on the second support block and measure the overall height DO2 of the second tapered roller inner ring assembly and the second support block; then install the outer ring on the second tapered roller inner ring assembly, measure the overall height BO of the second support block and the outer ring, and calculate the distance AO2 between the A end face of the outer ring and the bottom surface of the second support block, AO2 = BO - AB;

[0012] Then calculate the distance AD' between the A end face of the outer ring and the small end face of the second inner ring, AD'=DO2-AO2;

[0013] Calculate the axial clearance Ga1 of the double-row tapered roller bearing, where Ga1 = AD - AD'.

[0014] Further, the measurement of the axial clearance of the four-point ball bearing in step 2 includes the following steps: after assembling the qualified first tapered roller inner ring assembly and the second tapered roller inner ring assembly with the outer ring, place them on the platform measuring instrument, with the first inner ring raised so that the outer ring is in a free sinking state, and measure the height AE between the A end face of the outer ring and the large end face of the second inner ring.

[0015] Raise the B end face of the outer ring so that the inner components of the tapered roller bearing are in a free-sinking state. At this time, assemble the fourth inner ring, steel balls, and third cage onto the outer ring and measure the height AG between the A end face of the outer ring and the outer end face of the fourth inner ring.

[0016] Calculate the vertical distance FE between the inner end face of the fourth inner ring and the large end face of the second inner ring, and calculate the axial clearance Ga2 of the four-point ball bearing, where Ga2 = FE - (AE - AG - GF);

[0017] Furthermore, in step 3, after assembling the first tapered roller inner ring assembly, the second tapered roller inner ring assembly, and the four-point ball bearing inner ring assembly into the outer ring, the large end face of the first inner ring is raised with the first support block, the dial indicator tip is placed on the A end face of the outer ring, and the height of the assembled automotive wheel hub bearing is measured with a height block.

[0018] Furthermore, in step 1, when the axial clearance of the double-row tapered roller bearing is small, the second tapered roller inner ring assembly is replaced until the axial clearance of the double-row tapered roller bearing is qualified.

[0019] Furthermore, in step 2, when the axial clearance of the four-point ball bearing is small, the inner ring assembly of the four-point ball bearing is replaced until its axial clearance is qualified.

[0020] Furthermore, in step 3, when the height of the car wheel hub bearing is too low, it is adjusted by replacing the fourth inner ring, and steps 2 to 3 above are repeated.

[0021] The advantages of this invention compared to the prior art are:

[0022] The automotive wheel hub bearing assembly method provided by this invention includes the following steps: Step 1: Measure the axial clearance of the double-row tapered roller bearing. If the axial clearance of the double-row tapered roller bearing is large, grind the small end face of the second inner ring to make it acceptable; Step 2: After the axial clearance of the double-row tapered roller bearing is acceptable, measure the axial clearance of the four-point ball bearing. If the axial clearance of the four-point ball bearing is large, grind the small end faces of the third and fourth inner rings to make the axial clearance of the four-point ball bearing acceptable; Step 3: After the axial clearance of the four-point ball bearing is acceptable, assemble the first tapered roller inner ring assembly, the second tapered roller inner ring assembly, and the four-point ball bearing inner ring assembly into the outer ring, and then measure the height of the automotive wheel hub bearing. If the height of the automotive wheel hub bearing is large, grind the large end face of the fourth inner ring to make the height of the automotive wheel hub acceptable. This method is convenient and accurate, ensuring the smooth production of automotive wheel hub bearings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an automotive wheel hub bearing according to an embodiment of the present invention;

[0024] Figure 2This is a schematic diagram of the structure for measuring AB according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure for measuring DO1 according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the measurement AO structure according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure for measuring DO2 according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure for measuring BO according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure used to calculate AE in an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure during AG measurement according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure for measuring the assembly height of an automotive wheel hub bearing according to an embodiment of the present invention.

[0032] In the diagram: 1. Outer ring, 2. First inner ring, 3. First cage, 4. First tapered roller, 5. Second inner ring, 6. Second cage, 7. Second tapered roller, 8. Third inner ring, 9. Fourth inner ring, 10. Third cage, 11. Steel ball, 12. First support block, 13. Second support block. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Example 1

[0035] like Figure 1-9As shown, the automotive wheel hub bearing assembly method comprises a double-row tapered roller bearing and a row of four-point contact ball bearings arranged back-to-back. The double-row tapered roller bearing and the four-point ball bearing share an outer ring 1. The double-row tapered roller bearing includes a first tapered roller inner ring assembly and a second tapered roller inner ring assembly disposed within the outer ring 1. The first tapered roller inner ring assembly includes a first inner ring 2 and a first tapered roller 4 disposed between the first inner ring 2 and the outer ring 1 via a first cage 3. The second tapered roller inner ring assembly includes a second inner ring 5 and a second tapered roller 7 disposed between the second inner ring 5 and the outer ring 1 via a second cage 6. The four-point contact ball bearing includes a four-point ball bearing inner ring assembly disposed within the outer ring 1. The four-point ball bearing inner ring assembly includes a third inner ring 8 and a fourth inner ring 9 arranged side-by-side, and steel balls 11 disposed between the third inner ring 8, the fourth inner ring 9, and the outer ring 1 via a third cage 10. The third inner ring 8 is closer to the second inner ring 5. The automotive wheel hub bearing assembly method includes the following steps:

[0036] Step 1: Measure the axial clearance of the double-row tapered roller bearing and determine whether the axial clearance of the double-row tapered roller bearing is qualified. When the axial clearance of the double-row tapered roller bearing is large, it can be qualified by grinding the small end face of the second inner ring 5. This operation is convenient and efficient. When the axial clearance of the double-row tapered roller bearing is small, replace the second tapered roller inner ring assembly until the axial clearance of the double-row tapered roller bearing is qualified.

[0037] Step 2: After the axial clearance of the double-row tapered roller bearing is qualified, measure the axial clearance of the four-point ball bearing and determine whether the axial clearance of the four-point ball bearing is qualified. When the axial clearance of the four-point ball bearing is large, grind the small end face dimensions of the third inner ring 8 and the fourth inner ring 9 to make the axial clearance of the four-point ball bearing qualified. When the axial clearance of the four-point ball bearing is small, replace the inner ring assembly of the four-point ball bearing until its axial clearance is qualified.

[0038] Step 3: After the axial clearance of the four-point ball bearing is qualified, assemble the first tapered roller inner ring assembly, the second tapered roller inner ring assembly, and the four-point ball bearing inner ring assembly into the outer ring 1. Measure the height of the automotive wheel hub bearing and determine whether the height of the automotive wheel hub bearing is qualified. If the height of the automotive wheel hub bearing is too large, grind the large end face of the fourth inner ring 9 to make the automotive wheel hub height qualified.

[0039] It should be noted that the assembly method of automotive wheel hub bearings in this embodiment first measures and adjusts the axial clearance of the double-row tapered roller bearing, then measures and adjusts the axial clearance of the four-point ball bearing, and finally measures and adjusts the assembly height of the bearing. The measurement is convenient and accurate, which can ensure the smooth production of automotive wheel hub bearings and improve production efficiency.

[0040] Step 1 of this embodiment, measuring the axial clearance of the double-row tapered roller bearing, includes the following steps: Figure 2 As shown, the vertical distance AB between end face A of outer ring 1 and end face B of outer ring 1 is measured, where end face A of outer ring 1 is the end face closer to the side of the four-point contact ball bearing.

[0041] like Figure 3 As shown, the first tapered roller inner ring assembly is placed on the first support block 12, with the large end face of the first inner ring 2 facing down, and the overall height DO1 of the first tapered roller inner ring assembly and the first support block 12 is measured.

[0042] like Figure 4 As shown, the outer ring 1 is then installed onto the first tapered roller inner ring assembly, and the overall height AO1 of the first support block 12 and the outer ring 1 is measured.

[0043] Calculate the vertical distance AD ​​between the small end face of the first inner ring 2 and the A end face of the outer ring 1, AD = AO1 - DO1;

[0044] like Figure 5 As shown, the second tapered roller inner ring assembly is placed on the second support block 13, with the large end face of the second inner ring 5 facing down, and the overall height DO2 of the second tapered roller inner ring assembly and the second support block 13 is measured.

[0045] like Figure 6 As shown, the outer ring 1 is then installed on the second tapered roller inner ring assembly. The overall height BO of the second support block 13 and the outer ring 1 is measured, and the distance AO2 between the A end face of the outer ring 1 and the bottom surface of the second support block 13 is calculated, where AO2 = BO - AB.

[0046] Then calculate the distance AD' between end face A of outer ring 1 and small end face of second inner ring 5, AD'=DO2-AO2;

[0047] Calculate the axial clearance Ga1 of the double-row tapered roller bearing, where Ga1 = AD - AD'.

[0048] It should be noted that in this embodiment, the axial clearance of the double-row tapered roller bearing is measured with the assistance of the first support block 12 and the second support block 13. The steps are simple, easy to operate, and the measurement accuracy is high.

[0049] Step 2 of this embodiment, measuring the axial clearance of the four-point ball bearing, includes the following steps: Figure 7 As shown, the first tapered roller inner ring assembly and the second tapered roller inner ring assembly, which are assembled with the outer ring 1, are placed on the platform measuring instrument. The large end face of the first inner ring 2 is facing down and is supported, so that the outer ring 1 is in a free sinking state. The height AE between the A end face of the outer ring 1 and the large end face of the second inner ring 5 is measured.

[0050] like Figure 8 As shown, the B end face of the outer ring 1 is raised so that the inner components of the tapered roller bearing are in a free-sinking state. At this time, the fourth inner ring 9, steel ball 11, and third cage 10 are assembled onto the outer ring 1. The height AG between the A end face of the outer ring 1 and the outer end face of the fourth inner ring 9 is measured.

[0051] Calculate the vertical distance FE between the small end face of the fourth inner ring 9 and the large end face of the second inner ring 5, and calculate the axial clearance Ga2 of the four-point ball bearing. Ga2 = FE - (AE - AG - GF).

[0052] It should be noted that the above-described steps for measuring the axial clearance of a four-point ball bearing are simple, easy to operate, and highly accurate.

[0053] After the double-row conical portion and the four-point contact portion are assembled in step 3 of this embodiment, as follows: Figure 9 As shown, the large end face of the first inner ring 2 is supported by the first support block 12, and the dial indicator tip is placed on the A end face of the outer ring 1. The assembly height of the assembled automotive wheel hub bearing is measured using a height block. It should be noted that the above technical solution measures the assembly height of the automotive wheel hub bearing using a support block and a height block, which is easy to operate and has high measurement accuracy.

[0054] When the height of the car wheel hub bearing is too low, adjust it by replacing the fourth inner ring 9, and repeat steps 2 to 3 above.

[0055] It should be noted that the assembly method of automotive wheel hub bearings in this embodiment first measures and adjusts the axial clearance of the double-row tapered roller bearing, then measures and adjusts the axial clearance of the four-point ball bearing, and finally measures and adjusts the assembly height of the bearing. The measurement is convenient and accurate, which can ensure the smooth production of automotive wheel hub bearings and improve production efficiency.

[0056] It should be noted that the parts of this invention not described in detail are prior art.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "joining," "fixing," and "screw-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0062] In the description of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0063] Although embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for assembling automotive wheel hub bearings, characterized in that: The automotive wheel hub bearing consists of a double-row tapered roller bearing and a row of four-point contact ball bearings arranged back-to-back. The double-row tapered roller bearing and the four-point contact ball bearing share a common outer ring. The double-row tapered roller bearing includes a first tapered roller inner ring assembly and a second tapered roller inner ring assembly disposed within the outer ring. The first tapered roller inner ring assembly includes a first inner ring and first tapered rollers disposed between the first inner ring and the outer ring via a first cage. The second tapered roller inner ring assembly includes a second inner ring and second tapered rollers disposed between the second inner ring and the outer ring via a second cage. The four-point contact ball bearing includes a four-point contact ball bearing inner ring assembly disposed within the outer ring. The four-point contact ball bearing inner ring assembly includes a third inner ring and a fourth inner ring arranged side-by-side, and steel balls disposed between the third inner ring, the fourth inner ring, and the outer ring via a third cage. The third inner ring is closer to the second inner ring. The assembly method for the automotive wheel hub bearing includes the following steps: Step 1: Measure the axial clearance of the double-row tapered roller bearing, including the following steps: Measure the vertical distance AB between end face A of the outer ring and end face B of the outer ring, wherein end face A of the outer ring is the end face closest to the side of the four-point contact ball bearing. Place the first tapered roller inner ring assembly on the first support block and measure the overall height DO1 of the first tapered roller inner ring assembly and the first support block; then install the outer ring on the first tapered roller inner ring assembly and measure the overall height AO1 of the first support block and the outer ring; calculate the vertical distance AD ​​between the small end face of the first inner ring and the A end face of the outer ring, AD = AO1 - DO1; Place the second tapered roller inner ring assembly on the second support block and measure the overall height DO2 of the second tapered roller inner ring assembly and the second support block; then install the outer ring on the second tapered roller inner ring assembly, measure the overall height BO of the second support block and the outer ring, and calculate the distance AO2 between the A end face of the outer ring and the bottom surface of the second support block, AO2=BO-AB; Then calculate the distance AD' between the A end face of the outer ring and the small end face of the second inner ring, AD'=DO2-AO2; Calculate the axial clearance Ga1 of the double-row tapered roller bearing, where Ga1 = AD - AD'; And determine whether the axial clearance of the double-row tapered roller bearing is qualified. When the axial clearance of the double-row tapered roller bearing is large, it is qualified by grinding the small end face of the second inner ring. Step 2: After the axial clearance of the double-row tapered roller bearing is qualified, measure the axial clearance of the four-point contact ball bearing and determine whether the axial clearance of the four-point contact ball bearing is qualified. When the axial clearance of the four-point contact ball bearing is large, grind the small end face dimensions of the third inner ring and the fourth inner ring to make the axial clearance of the four-point contact ball bearing qualified. Step 3: After the axial clearance of the four-point contact ball bearing is qualified, assemble the first tapered roller inner ring assembly, the second tapered roller inner ring assembly, and the four-point contact ball bearing inner ring assembly into the outer ring. Then measure the height of the car wheel hub bearing and determine whether the height of the car wheel hub bearing is qualified. If the height of the car wheel hub bearing is too large, grind the large end face of the fourth inner ring to make the height of the car wheel hub qualified.

2. The method for assembling automotive wheel hub bearings according to claim 1, characterized in that: Step 2, measuring the axial clearance of the four-point contact ball bearing, includes the following steps: After assembling the qualified first tapered roller inner ring assembly and the second tapered roller inner ring assembly with the outer ring, place them on the platform measuring instrument, with the first inner ring raised so that the outer ring is in a free sinking state, and measure the height AE between the A end face of the outer ring and the large end face of the second inner ring. Raise the B end face of the outer ring so that the inner components of the tapered roller bearing are in a free-sinking state. At this time, assemble the fourth inner ring, steel balls, and third cage onto the outer ring and measure the height AG between the A end face of the outer ring and the outer end face of the fourth inner ring. Calculate the vertical distance FE between the inner end face of the fourth inner ring and the large end face of the second inner ring, and calculate the axial clearance Ga2 of the four-point contact ball bearing, Ga2=FE-(AE-AG-GF).

3. The method for assembling automotive wheel hub bearings according to claim 1, characterized in that: In step 3, after assembling the first tapered roller inner ring assembly, the second tapered roller inner ring assembly, and the four-point contact ball bearing inner ring assembly into the outer ring, the large end face of the first inner ring is raised with the first support block, the dial indicator tip is placed on the A end face of the outer ring, and the height of the assembled automotive wheel hub bearing is measured with a height block.

4. The method for assembling automotive wheel hub bearings according to claim 1, characterized in that: In step 1, when the axial clearance of the double-row tapered roller bearing is small, replace the second tapered roller inner ring assembly until the axial clearance of the double-row tapered roller bearing is within acceptable limits.

5. The method for assembling automotive wheel hub bearings according to claim 1 or 2, characterized in that: In step 2, when the axial clearance of the four-point contact ball bearing is small, replace the inner ring assembly of the four-point contact ball bearing until its axial clearance is within acceptable limits.

6. The method for assembling automotive wheel hub bearings according to claim 1 or 3, characterized in that: In step 3, when the height of the car wheel hub bearing is too low, adjust it by replacing the fourth inner ring, and repeat steps 2 to 3 above.

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