Method of assembling a roller needle bearing

Abstract

The application relates to the technical field of bearing assembly, in particular to a roller and needle bearing assembly method, a second end of an inner ring is placed on an operation surface; a needle is placed in a raceway of the inner ring to form an inner ring assembly; an outer ring is sleeved on the outer side of the inner ring assembly from a first end to a second end; a first tool is placed, and the bearing is turned over by 180 degrees and placed on the first tool, a first sealing ring is installed between the outer ring and the inner ring and on the side opposite to the first tool; the bearing is taken off from the first tool and turned over by 180 degrees; a retaining ring is installed, a second sealing ring is installed between the retaining ring and the outer ring; a second tool is placed; a washer and a nut are installed on the first end of the inner ring in sequence. The application reasonably arranges a bearing assembly process, guarantees that the first sealing ring and the second sealing ring play a sealing role after the bearing is assembled, guarantees that the inner ring will not fall out of the bearing after assembly, and the assembly steps are relatively smooth and the efficiency is relatively high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing assembly, in particular to a roller needle bearing assembly method. BACKGROUND

[0002] The roller needle bearing comprises an inner ring, a needle and an outer ring, and the structure of the inner ring is special. A thread is formed on the outer diameter of one end of the inner ring, and the thread is used in cooperation with a nut. A raceway for installing the needle is formed on the other end of the inner ring, and the second end of the inner ring with the needle installed is sleeved with the outer ring.

[0003] In the traditional assembly process, the inner ring is difficult to position and is easy to fall off from the outer ring due to the thin and long structure of the inner ring compared with the outer ring, and the assembly efficiency is low. In addition, the assembly steps are arbitrary, and the sealing effect of the two sides after assembly is poor, which affects the use of the bearing to some extent. SUMMARY

[0004] In view of the defects of the prior art, the present application provides a roller needle bearing assembly method, which is convenient and can ensure that the sealing rings on both sides play a sealing role.

[0005] In order to achieve the above purpose, the technical scheme provided by the present application is a roller needle bearing assembly method, the roller needle bearing comprises an inner ring, a needle and an outer ring, the inner ring has a first end and a second end away from each other, a thread is formed on the outer diameter of the first end, the thread is used in cooperation with a nut, a raceway for installing the needle is formed on the second end, and the second end with the needle installed is sleeved with the outer ring, and the assembly method comprises the following steps:

[0006] S100, placing the second end of the inner ring on the operating surface;

[0007] S200, placing the needle in the raceway of the inner ring to form an inner ring assembly;

[0008] S300, sleeving the outer ring on the outer side of the inner ring assembly from the first end to the second end;

[0009] S400, placing a first tool, and placing the bearing in S300 on the first tool by turning over 180°, so that the end face of the outer ring is attached to the end face of the first tool;

[0010] S500, installing a first sealing ring between the outer ring and the inner ring, away from the side of the first tool;

[0011] S600, taking the bearing off the first tool and turning over 180°;

[0012] S700, installing a retainer on the side between the outer ring and the inner ring, opposite to the first sealing ring, and installing a second sealing ring between the retainer and the outer ring;

[0013] S800, placing a second tooling so that the end surface of the second tooling is in close contact with the end surface of the retainer;

[0014] S900, installing a washer and a nut on the first end of the inner ring in sequence.

[0015] Further, the step S200 comprises uniformly applying lubricating grease in the raceway.

[0016] Further, in the step S400, when the end surface of the outer ring is in close contact with the end surface of the first tooling, the first end of the inner ring is ensured to be in a suspended state.

[0017] Further, the step S500 comprises uniformly pressing the first sealing ring from the second end of the inner ring to the first end of the inner ring by using an annular pressing tool until the end surface of the first sealing ring is in close contact with the outer ring.

[0018] Further, the annular pressing tool has an annular pressing surface.

[0019] Further, the step S700 of installing a retainer on the side between the outer ring and the inner ring, opposite to the first sealing ring, comprises:

[0020] S710, gradually installing the retainer on the inner ring from the first end of the inner ring to the second end of the inner ring in a circumferential direction;

[0021] S720, knocking the retainer downward so that the retainer is in close contact with the inner ring.

[0022] Further, the step of installing a second sealing ring between the retainer and the outer ring in the step S700 comprises:

[0023] S730, uniformly pressing the second sealing ring from the first end of the inner ring to the second end of the inner ring by using an annular pressing tool until the end surface of the second sealing ring is in close contact with the outer ring.

[0024] Further, the annular pressing tool has an annular pressing surface.

[0025] Further, the operation surface comprises a horizontal surface of an operation platform or a ground surface.

[0026] Further, the step S900 comprises removing the second tooling.

[0027] The application has the beneficial effects that the first tool and the second tool are applied ingeniously, the end face of the first tool is attached to the end face of the outer ring to support the first sealing ring during installation, the end face of the second tool is attached to the end face of the retainer to support the second sealing ring during installation, the two sealing rings are installed stably, the first sealing ring and the second sealing ring can play the sealing role after the bearing is assembled, the bearing assembly process is reasonably arranged, the flexibility of the bearing rotation is ensured, the inner ring cannot fall out of the bearing after assembly, the assembly steps are smooth, and the efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure schematic view of the roller needle bearing in an embodiment of the application.

[0029] Figure 2 It is an assembly state view of step S100 in an embodiment of the application.

[0030] Figure 3 It is an assembly state view of step S200 in an embodiment of the application.

[0031] Figure 4 It is an assembly state view of step S300 in an embodiment of the application.

[0032] Figure 5 It is an assembly state view of step S400 in an embodiment of the application.

[0033] Figure 6 It is an assembly state view of step S500 in an embodiment of the application.

[0034] Figure 7 It is an assembly state view of step S600 in an embodiment of the application.

[0035] Figure 8 It is an assembly state view of step S700 of installing the retainer in an embodiment of the application.

[0036] Figure 9 It is an assembly state view of step S700 of installing the second sealing ring in an embodiment of the application.

[0037] Figure 10 It is an assembly state view of step S800 in an embodiment of the application.

[0038] Figure 11 It is an assembly state view of step S900 in an embodiment of the application.

[0039] In the figure: 100, inner ring, 110, first end, 120, second end, 130, raceway,

[0040] 200, needle roller,

[0041] 300, outer ring,

[0042] 400, nut,

[0043] 500, first sealing ring,

[0044] 600, retainer ring,

[0045] 700, washer,

[0046] 800, second sealing ring,

[0047] 1, first tool, 2, second tool, 3, operation surface. DETAILED DESCRIPTION

[0048] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0049] Referring to Figure 1 and Figure 2 A method for assembling a roller needle bearing, the roller needle bearing comprising an inner ring 100, a needle 200 and an outer ring 300, the inner ring 100 having a first end 110 and a second end 120 away from each other, the outer diameter of the first end 110 being provided with a thread, the thread being used to cooperate with a nut 400, the second end 120 being provided with a raceway 130 for mounting the needle 200, the second end 120 provided with the needle 200 being sleeved with the outer ring 300, the steps of the assembling method comprising:

[0050] Referring to Figure 2 , step S100, placing the second end 120 of the inner ring 100 on the operation surface 3; it should be noted that the operation surface 3 includes but is not limited to a flat table top / ground, or a horizontal workbench. In this embodiment, step S100 is in a vertical placement state.

[0051] Referring to Figure 3 , step S200, placing the needle 200 in the raceway 130 of the inner ring 100 to form an inner ring assembly; it should be noted that in this embodiment, the inner ring assembly includes the inner ring 100 and a plurality of needles 200 mounted in the raceway 130 of the inner ring 100. During the specific assembly process, they can be sequentially mounted along the circumferential direction.

[0052] Referring to Figure 4, step S300, the outer ring 300 is sleeved on the outer side of the inner ring assembly from the first end 110 to the second end 120;

[0053] Referring to Figure 5 , step S400, the first tool 1 is placed, and the bearing in step S300 is placed on the first tool 1 by being turned over by 180°, so that the end face of the outer ring 300 is attached to the end face of the first tool 1;

[0054] Referring to Figure 6 , step S500, the first sealing ring 500 is installed between the outer ring 300 and the inner ring 100, on the side opposite to the first tool 1;

[0055] Referring to Figure 7 , step S600, the bearing is taken off from the first tool 1 and is turned over by 180°;

[0056] Referring to Figure 8 and Figure 9 , step S700, the retainer ring 600 is installed between the outer ring 300 and the inner ring 100, on the side opposite to the first sealing ring 500, and the second sealing ring 800 is installed between the retainer ring 600 and the outer ring 300;

[0057] Referring to Figure 10 , step S800, the second tool 2 is placed, so that the end face of the second tool 2 is attached to the end face of the retainer ring 600;

[0058] Referring to Figure 11 , step S900, the washer 700 and the nut 400 are installed on the first end 110 of the inner ring 100 in sequence.

[0059] The above roller needle bearing assembly method skillfully applies the first tool 1 and the second tool 2. The end face of the first tool 1 is attached to the end face of the outer ring 300, which plays a supporting role when the first sealing ring 500 is installed. The end face of the second tool 2 is attached to the end face of the retainer ring 600, which plays a supporting role when the second sealing ring 800 is installed. Thus, the two sealing rings are installed more stably, the first sealing ring 500 and the second sealing ring 800 can play a sealing role after the bearing is assembled, the bearing assembly process is reasonably arranged, the flexibility of the bearing rotation is ensured, the inner ring 100 will not fall out of the bearing after assembly, the assembly steps are smooth, and the efficiency is high.

[0060] Further, in an embodiment, step S200 includes uniformly applying lubricating grease in the raceway 130. In this way, the needle roller 200 is more conducive to rolling in the raceway 130, and the bearing operation is more smooth.

[0061] Further, in an embodiment, referring to Figure 5 and Figure 6In step S400, when the end face of the outer ring 300 is aligned with the end face of the first fixture 1, it is ensured that the first end 110 of the inner ring 100 is suspended. The above-described roller needle bearing assembly method uses the first fixture 1 to elevate the bearing, ensuring that the other end face of the outer ring 300 and the first end 110 of the inner ring 100 are flush, facilitating the installation of the first sealing ring 500 between the inner ring 100 and the outer ring 300. To ensure that the first end 110 of the inner ring 100 is suspended, a fixture of suitable height must be selected for the first fixture 1.

[0062] Further, in one embodiment, step S500 includes using an annular pressing tool to uniformly press the first sealing ring 500 from the second end 120 of the inner ring 100 toward the first end 110 until the end face of the first sealing ring 500 is tightly fitted to the outer ring 300. Preferably, in one embodiment, the annular pressing tool has an annular pressing surface.

[0063] It should be noted that the ring-shaped pressing tool can have a cylindrical structure. The bottom annular surface of the cylindrical tool abuts against the first sealing ring 500, pressing it downwards to ensure more even force distribution, until the first sealing ring 500 is tightly pressed against the outer ring 300. Besides the cylindrical structure, a rod-shaped structure can also be used, pressing at multiple points, such as four points at 90° intervals around the first sealing ring 500. However, this method is less efficient than the cylindrical structure and is more prone to uneven force distribution; therefore, a cylindrical tool is preferred.

[0064] Furthermore, in one embodiment, the step S700 of installing the retaining ring 600 between the outer ring 300 and the inner ring 100, on the side opposite to the first sealing ring 500, includes:

[0065] S710. Install the retaining ring 600 gradually onto the inner ring 100 from the first end 120 to the second end 130 in a circumferential manner.

[0066] S720, Tap the retaining ring 600 downwards to make the retaining ring 600 fit tightly against the inner ring 100.

[0067] Furthermore, step S700, which involves installing the second sealing ring 800 between the retaining ring 600 and the outer ring 300, includes:

[0068] S730. Using an annular pressing tool, the second sealing ring 800 is pressed down evenly from the first end 110 of the inner ring 100 towards the second end 130 until the end face of the second sealing ring 800 is tightly fitted against the outer ring 300. Further, in one embodiment, the annular pressing tool has an annular pressing surface.

[0069] It should be noted that, in this embodiment, the annular pressing tool used to press down the first sealing ring 500 can be a cylindrical structure. The bottom annular surface of the cylindrical tool abuts against the first sealing ring 500, pressing down the second sealing ring 800 to ensure more even force distribution, pressing the second sealing ring 800 until its end face tightly adheres to the outer ring 300. Besides the cylindrical structure, a rod-shaped structure can also be used for point-by-point pressing, such as pressing down at four points 90° apart on the second sealing ring 800. This method is less efficient than the cylindrical structure and the force distribution is more likely to be uneven; therefore, a cylindrical tool is preferred.

[0070] Furthermore, in one embodiment, the operating surface 3 includes a horizontal surface of the operating platform or the ground. To ensure uniform force distribution during seal installation, the operating surface 3 is preferably a flat and horizontal surface during installation.

[0071] Furthermore, in one embodiment, step S900 includes removing the second tooling 2.

[0072] It should be noted that, depending on the specific working conditions, the second tooling 2 can be selectively removed or not removed. For example, if the bearing is assembled and needs to be transported, the second tooling 2 can be left in place to avoid misalignment of the washer 700 and the nut 400. The second tooling 2 can be removed when the bearing is transported to the application site and needs to be installed and used.

[0073] 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.

[0074] 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.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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.

[0076] In this invention, unless otherwise explicitly specified and limited, "above" or "below" a 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 a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. 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 intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A method for assembling a roller needle roller bearing, wherein the roller needle roller bearing comprises an inner ring, needle rollers, and an outer ring, the inner ring having a first end and a second end that are spaced apart from each other, the outer diameter of the first end being threaded for engaging with a nut, the second end having a raceway for mounting the needle rollers, and the outer ring being fitted onto the second end where the needle rollers are mounted, characterized in that: The assembly method includes the following steps: S100, Place the second end of the inner ring on the operating surface; S200: Needle rollers are placed in the raceway of the inner ring to form the inner ring assembly; S300, Fit the outer ring from the first end to the second end onto the outside of the inner ring assembly; S400, Place the first fixture, and rotate the bearing in S300 by 180° and place it on the first fixture so that the end face of the outer ring is in contact with the end face of the first fixture; S500, Install a first sealing ring between the outer ring and the inner ring, on the side relatively away from the first tooling; S600, Remove the bearing from the first fixture and rotate it 180°; S700, Install a retaining ring between the outer ring and the inner ring, on the side opposite to the first sealing ring, and install a second sealing ring between the retaining ring and the outer ring; S800, Place the second tooling so that the end face of the second tooling fits against the end face of the retaining ring; S900, install the washer and nut sequentially at the first end of the inner ring.

2. The roller needle bearing assembly method according to claim 1, characterized in that: Step S200 includes uniformly applying grease into the raceway.

3. The roller needle bearing assembly method according to claim 1, characterized in that: When the end face of the outer ring in step S400 is attached to the end face of the first tooling, ensure that the first end of the inner ring is in a suspended state.

4. The roller needle bearing assembly method according to any one of claims 1-3, characterized in that: Step S500 includes using an annular pressing tool to uniformly press the first sealing ring from the second end of the inner ring toward the first end until the end face of the first sealing ring tightly fits the outer ring.

5. The roller needle bearing assembly method according to claim 4, characterized in that: The annular pressing tool has an annular pressing surface.

6. The roller needle bearing assembly method according to any one of claims 1-3, characterized in that: The step of installing the retaining ring between the outer ring and the inner ring, on the side opposite to the first sealing ring, in step S700 includes: S710. Install the retaining ring gradually onto the inner ring from the first end to the second end in a circumferential direction. S720. Tap the retaining ring downwards to make it fit tightly against the inner ring.

7. The roller needle bearing assembly method according to any one of claims 1-3, characterized in that: The step of installing the second sealing ring between the retaining ring and the outer ring in step S700 includes: S730. Use a ring pressing tool to press the second sealing ring evenly from the first end of the inner ring to the second end until the end face of the second sealing ring is tightly fitted to the outer ring.

8. The roller needle bearing assembly method according to claim 7, characterized in that: The annular pressing tool has an annular pressing surface.

9. The method for assembling a roller needle roller bearing according to any one of claims 1-3, characterized in that: The operating surface includes the horizontal surface of the operating platform or the ground.

10. The roller needle bearing assembly method according to any one of claims 1-3, characterized in that: Step S900 includes removing the second tooling.

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