Assembly process of a knuckle bearing

Abstract

The application belongs to the field of assembly and relates to an assembly process of a knuckle bearing. The assembly process of the knuckle bearing comprises the following steps: S1, placing a bearing outer ring of the knuckle bearing on an assembly seat; S2, pressing a strutting piece into an inner hole of the bearing outer ring to make the bearing outer ring be strutting, at this time, a hole diameter of the inner hole of the bearing outer ring is greater than a ball diameter of a bearing inner ring; S3, inserting a plug-in piece into a split seam of the bearing outer ring; S4, taking out the strutting piece from the bearing outer ring, and the bearing outer ring keeps the strutting state in the step S2 under the action of the plug-in piece; S5, placing the bearing inner ring in the inner hole of the bearing outer ring; S6, taking out the plug-in piece from the split seam of the bearing outer ring to make the bearing outer ring rebound, the split seam is closed, and the bearing outer ring is movably connected with the bearing inner ring. The assembly process can improve the performance of the knuckle bearing after assembly.

Description

Technical Field

[0001] This application belongs to the field of bearing assembly and relates to an assembly process for a spherical plain bearing. Background Technology

[0002] Spherical plain bearings are a type of spherical sliding bearing, commonly used for low-speed rocking, rotating, and tilting motions within a certain angle range. For example... Figure 1 , Figure 2 As shown, the spherical bearing includes an outer ring 1 and an inner ring 9. The outer ring 1 has a slit 11 and an inner hole. The wall of the inner hole is spherical. The inner ring 9 is disposed in the inner hole of the outer ring 1. The outer spherical surface of the inner ring 9 slides with the inner spherical surface of the inner hole of the outer ring 1.

[0003] Plain spherical bearings are widely used in the aerospace field. Plain spherical bearings used in this field are usually coated with a self-lubricating coating on the outer spherical surface of the inner ring 9. However, the coating layer is easily scratched, so the performance requirements such as appearance of the product are high. It is necessary to minimize the damage to the plain spherical bearing during the assembly process.

[0004] In related technologies, there are generally two methods for assembling spherical plain bearings:

[0005] like Figure 3 As shown, the bearing outer ring 1 is laid horizontally flat, and the bearing inner ring 9 is vertically aligned with the inner hole of the bearing outer ring 1. The bearing inner ring 9 is pressed into the inner hole of the bearing outer ring 1 using a hydraulic press. However, this method can easily scratch the outer spherical surface of the bearing inner ring 9, especially when the outer spherical surface has a self-lubricating coating, the coating is easily scratched, affecting the product performance.

[0006] like Figure 4 As shown, the outer ring 1 of the bearing is laid flat, and the outer ring 1 is opened by a wedge at the opening crack 11. Then the inner ring 9 of the bearing is placed inside the opened outer ring 1. However, the edge of the opening crack 11 is easily burred, which causes the opening crack 11 to not close properly when the outer ring 1 is restored to a round shape, affecting the product performance. Summary of the Invention

[0007] To improve the performance of spherical plain bearings, this application provides an assembly process for spherical plain bearings.

[0008] This application provides an assembly process for a spherical plain bearing, employing the following technical solution:

[0009] An assembly process for a spherical plain bearing includes the following steps:

[0010] S1. Place the outer ring of the spherical plain bearing onto the mounting base;

[0011] S2. Press the expansion piece into the inner hole of the bearing outer ring to expand the bearing outer ring. At this time, the inner hole diameter of the bearing outer ring is larger than the ball diameter of the bearing inner ring.

[0012] S3. Insert the pull-out piece into the crack in the outer ring of the bearing;

[0013] S4. Remove the support piece from the outer ring of the bearing. The outer ring of the bearing remains in the supported state as in step S2 under the action of the insertion and removal piece.

[0014] S5. Place the inner ring of the bearing into the inner hole of the outer ring of the bearing;

[0015] S6. Remove the insert from the crack in the outer ring of the bearing, causing the outer ring to spring back, closing the crack, and allowing the outer ring to move into contact with the inner ring.

[0016] By adopting the above technical solution, after the bearing outer ring is opened by the expanding component, the insert component is then inserted into the priming crack. This reduces the likelihood of burrs forming in the priming crack and improves its closure, thus enhancing the overall performance of the product. Meanwhile, with the bearing outer ring remaining open, the bearing inner ring is placed within the inner bore of the outer ring. This prevents damage to the spherical coating on the inner ring, further improving product performance.

[0017] Preferably, the mounting base has a clearance hole, and the supporting member includes a tapered pin, the diameter of the small diameter end of the tapered pin being smaller than the diameter of the clearance hole; when the bearing outer ring is placed on the mounting base in step S1, the inner hole of the bearing outer ring is aligned with the clearance hole.

[0018] By adopting the above technical solution, after setting the relief hole, the tapered pin is compressed, and the relief hole provides more space for the small diameter end of the tapered pin to move; if the relief hole is not set, the tapered pin is prone to collision with the mounting base and cause damage.

[0019] Preferably, the tapered pin includes a tapered section and a cylindrical section, the tapered section and the cylindrical section are coaxially arranged, the large-diameter end of the tapered section is connected to the cylindrical section and the diameters of the two are equal; in step 2, when the outer ring of the bearing is kept in an open state, the outer wall of the cylindrical section of the tapered pin is in contact with the inner hole wall of the outer ring of the bearing, and the tapered section of the tapered pin is located in the clearance hole.

[0020] By adopting the above technical solution, the tapered pin is provided with a cylindrical section. When the cylindrical section is in contact with the inner hole of the bearing outer ring, it indicates that the bearing outer ring has been opened to the predetermined state. At this time, even if the tapered pin is pushed a little further, the bearing outer ring will still be in the predetermined state and will not continue to be opened, thus reducing the assembly difficulty.

[0021] Preferably, the mounting base has a sliding groove, and the insert is slidably disposed in the sliding groove. In step S1, while placing the outer ring of the spherical bearing on the mounting base, the guide crack of the outer ring of the bearing is aligned with the sliding groove. In step S3, the insert is pushed to slide along the sliding groove and inserted into the guide crack.

[0022] By adopting the above technical solution, the groove can be used to place plug-in components, and it can also guide the plug-in components when they slide.

[0023] Preferably, in step S3, after the insert is inserted into the crack in the outer ring of the bearing, the insert is fixed by a locking device.

[0024] By adopting the above technical solution and setting a locking device, the possibility of the plug-in component moving under the spring force of the bearing outer ring is reduced.

[0025] Preferably, the locking device includes a threaded through hole opened on the mounting base and a screw threaded in the threaded through hole, the threaded through hole being perpendicular to and connected to the slide groove; in step S3, after the insert is inserted into the guide crack of the outer ring of the bearing, the screw is rotated so that the head of the screw presses against the side wall of the insert, thereby fixing the insert in the slide groove.

[0026] By adopting the above technical solution, the plug-in component is fixed by screws.

[0027] Preferably, in step S4, the cylindrical section of the tapered pin is pushed by the pressure block, causing the tapered pin to disengage from the inner hole of the bearing outer ring and slide into the relief hole of the mounting base.

[0028] By adopting the above technical solution, the tapered pin is pressed out of the outer ring of the bushing by the pressure block, providing space for the placement of the inner ring of the bearing.

[0029] Preferably, step S5 includes the following steps:

[0030] S51. Replace the tapered pin in the clearance hole with a support component;

[0031] S52. Remove the pressure block;

[0032] S53. Place the inner ring of the bearing in the inner hole of the outer ring of the bearing, with the spherical surface of the inner ring of the bearing abutting against the upper end of the support, and the center of the inner ring of the bearing and the center of the outer ring of the bearing on the same horizontal plane.

[0033] S54. Press the pressure ring against the upper surface of the outer ring of the bearing.

[0034] By adopting the above technical solution, a support component is provided to ensure the concentricity of the bearing inner ring and the bearing outer ring during installation; a pressure ring is provided to prevent the bearing outer ring from running out of space and damaging the spherical surface of the bearing inner ring when the insertion and removal components are removed later.

[0035] Preferably, in step S6, the screw is first rotated to separate the screw head from the insert, and then the insert is slid from the guide crack into the groove.

[0036] By adopting the above technical solution, rotating the screw allows the insert to slip out of the crack. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a spherical bearing.

[0038] Figure 2 This is a cross-sectional view of a spherical bearing.

[0039] Figure 3 This is an assembly schematic diagram of a type of spherical bearing in related technologies.

[0040] Figure 4 This is an assembly schematic diagram of another type of spherical bearing in related technologies.

[0041] Figure 5 This is a schematic diagram of the assembly structure of the spherical bearing in step S1 of the embodiment of this application.

[0042] Figure 6 This is a schematic diagram of the assembly structure of the spherical bearing in step S2 of the embodiment of this application.

[0043] Figure 7 This is a partial cross-sectional view of an embodiment of this application, used to illustrate the relationship between the plug-in component and the mounting base.

[0044] Figure 8 yes Figure 7 Top view.

[0045] Figure 9 This is a schematic diagram of the assembly structure of the spherical bearing in step S4 of the embodiment of this application.

[0046] Figure 10 This is a schematic diagram of the assembly structure when the inner ring of the bearing is placed on the outer ring of the bearing according to an embodiment of this application.

[0047] Explanation of reference numerals in the attached drawings: 1. Assembly seat; 11. Relief hole; 12. Positioning groove; 2. Bearing outer ring; 21. Lead-in crack; 3. Bearing inner ring; 4. Expansion pin; 41. Inverted conical part; 42. Cylindrical part; 43. Positioning boss; 44. Annular groove; 5. Pressure head; 51. Force-bearing part; 52. Sliding part; 53. Force-applying part; 6. Positioning seat; 61. Guide hole. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 5-10 This application will be described in further detail.

[0049] The assembly process of this spherical plain bearing includes the following steps:

[0050] S1, such as Figure 5 As shown, the outer ring 1 of the spherical plain bearing is placed on the mounting base 2;

[0051] Specifically, the upper surface of the mounting base 2 is provided with a receiving groove 21 for placing the outer ring 1 of the bearing, and the mounting base 2 is provided with a relief hole 22 in the vertical direction. The upper end of the relief hole 22 penetrates the bottom of the receiving groove 21 and communicates with the receiving groove 21, and the lower end of the relief hole 22 penetrates the lower surface of the mounting base 2.

[0052] The mounting base 2 is also provided with a sliding groove 23 along the horizontal direction.

[0053] In this step, the outer ring 1 of the spherical plain bearing is placed in the receiving groove 21 of the mounting base 2. It is also necessary to align the inner hole of the outer ring 1 with the relief hole 22 and align the lead-in crack 11 of the outer ring 1 with the slide groove 23.

[0054] S2, such as Figure 5 , Figure 6 As shown, the support 3 is pressed into the inner hole of the outer ring 1 of the bearing, so that the outer ring 1 of the bearing is opened. At this time, the inner hole diameter of the outer ring 1 of the bearing is larger than the ball diameter of the inner ring 9 of the bearing.

[0055] Specifically, the support member 3 includes a tapered pin, the diameter of the small-diameter end of the tapered pin being smaller than the diameter of the relief hole 22.

[0056] Alternatively, the support member 3 can also be a hemispherical structure, which can support the outer ring 1 of the bearing.

[0057] Preferably, the tapered pin includes a tapered section 31 and a cylindrical section 32, which are coaxially arranged. The small-diameter end of the tapered pin is located below, and the large-diameter end of the tapered section 31 is located above, connected to the cylindrical section 32, and both have the same diameter. The diameter of the small-diameter end of the tapered pin is smaller than the inner diameter of the bearing outer ring 1, while the diameters of the large-diameter end of the tapered pin and the cylindrical section 32 are larger than the inner diameter of the bearing outer ring 1 and smaller than the diameter of the clearance hole 22.

[0058] A positioning ring 4 is provided above the mounting base 2. The positioning ring 4 has a sliding hole 41 in the vertical direction. The sliding hole 41 passes through the upper and lower surfaces of the positioning ring 4 in the vertical direction. A pressure block 5 is slidably arranged in the sliding hole 41.

[0059] Step S2 includes the following steps:

[0060] S21. Place the tapered pin in the inner hole of the outer ring 1 of the bearing through the sliding hole 41, so that the small diameter end of the tapered pin extends through the outer ring 1 of the bearing and into the relief hole 22, and the large diameter end and the cylindrical section 32 of the tapered pin are located above the outer ring 1 of the bearing.

[0061] S22. Place the pressure block 5 in the sliding hole 41 and push the pressure block 5 downward to move the cylindrical section 32 of the tapered pin into the inner hole of the outer ring 1 of the bearing, so that it contacts the inner hole wall of the outer ring 1 of the bearing, thereby opening the outer ring 1 of the bearing. At this time, the inner hole diameter of the outer ring 1 of the bearing is larger than the ball diameter of the inner ring 9 of the bearing.

[0062] The pressure block 5 can be pushed by a cylinder or a linear motor.

[0063] S3, such as Figure 7 , Figure 8 As shown, the insert 6 is inserted into the slit 11 of the outer ring 1 of the bearing;

[0064] Specifically, the insert 6 is slidably disposed in the groove 23 of the mounting base 2, and the insert 6 is pushed to slide along the groove 23 to insert the insert 6 into the crack 11.

[0065] Preferably, the groove 23 is formed on the upper surface of the mounting base 2, and the insert 6 is a V-shaped wedge. The tip of the V-shaped wedge can be inserted into the lead-in crack 11 of the outer ring 1 of the bearing, and the side wall of the V-shaped wedge contacts the outer ring 1 of the bearing at the lead-in crack 11.

[0066] Alternatively, the plug-in component 6 can also be a plate-shaped structure. Using a V-shaped wedge can increase the contact area with the outer ring 1 of the bearing, ensuring the stability of the outer ring 1 of the bearing when it is in an open state.

[0067] The mounting base 2 is also provided with a locking device 7, which includes a threaded through hole 72 opened on the mounting base 2 and a screw 71 threaded in the threaded through hole 72. The threaded through hole 72 is perpendicular to and connected to the slide groove 23.

[0068] Step S3 includes the following steps:

[0069] S31. Push the V-shaped wedge along the slide groove 23 so that the tip of the V-shaped wedge is inserted into the guide crack 11 until the side wall of the V-shaped wedge contacts the bearing outer ring 1 area at the guide crack 11.

[0070] S32. Rotate screw 71 to press the head of screw 71 against the side wall of V-shaped wedge, so that V-shaped wedge is fixed in slide groove 23.

[0071] Alternatively, the locking device 7 can be a bolt, which is aligned with the V-shaped wedge. The bolt thread is set on the mounting base 2. Rotating the bolt will cause the head of the bolt to abut against the large end of the V-shaped wedge, which will also keep the tip of the V-shaped wedge in the crack 11. Alternatively, the locking device 7 can be a clamping device, which will fix the V-shaped wedge by clamping it.

[0072] S4, such as Figure 8 , Figure 9 As shown, the support 3 is removed from the outer ring 1 of the bearing, and the outer ring 1 of the bearing remains in the supported state in step S2 under the action of the insertion and removal part 6.

[0073] Specifically, the cylindrical section 32 of the tapered pin is pushed by the pressure block 5, causing the tapered pin to disengage from the inner hole of the outer ring 1 of the bearing and slide into the relief hole 22 of the mounting base 2.

[0074] S5, such as Figure 10 As shown, the inner ring 9 of the bearing is placed in the inner hole of the outer ring 1 of the bearing;

[0075] Specifically, step S5 includes the following steps:

[0076] S51. Replace the tapered pin in the clearance hole 22 with the support piece 8;

[0077] In this embodiment, the tapered pin can be removed from the lower end of the relief hole 22, and then the support member 8 is placed in the relief hole 22. The support member 8 is a support shaft, and the upper end of the support shaft provides support for the inner ring 9 of the bearing. Alternatively, the support member 8 can also be a support rod or a support seat.

[0078] S52. Remove the pressure block 5 from the sliding hole 41;

[0079] S53. The inner ring 9 of the bearing is placed vertically in the inner hole of the outer ring 1 of the bearing, the spherical surface of the inner ring 9 of the bearing is in contact with the upper end of the support 8, and the center of the ball of the inner ring 9 of the bearing and the center of the ball of the outer ring 1 of the bearing are located on the same horizontal plane.

[0080] S54. Press the pressure ring 81 against the upper surface of the outer ring 1 of the bearing.

[0081] S6, such as Figure 10 As shown, the insert 6 is removed from the lead-in crack 11 of the outer ring 1 of the bearing, causing the outer ring 1 of the bearing to spring back, the lead-in crack 11 to close, and the outer ring 1 of the bearing to move and engage with the inner ring 9 of the bearing.

[0082] Preferably, screw 71 is first rotated to separate the head of screw 71 from the insert 6, and then the insert 6 is slid from the lead-in crack 11 into the groove 23.

[0083] The working principle of this invention is as follows: After the outer ring 1 of the bearing is opened by the expanding member 3, the insert member 6 is then inserted into the guide crack 11. The guide crack 11 is less prone to burrs and has a good closure. While the outer ring 1 of the bearing remains in the opened state, the inner ring 9 of the bearing is placed in the inner hole of the outer ring 1. The spherical coating of the inner ring 9 of the bearing is less likely to be damaged.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An assembly process for a spherical plain bearing, characterized in that, Includes the following steps: S1. Place the outer ring (1) of the spherical plain bearing on the mounting base (2); S2. Press the support (3) into the inner hole of the bearing outer ring (1) to open the bearing outer ring (1). At this time, the inner hole diameter of the bearing outer ring (1) is larger than the ball diameter of the bearing inner ring (9). S3. Insert the insert (6) into the lead-in crack (11) of the outer ring (1) of the bearing; S4. Remove the support (3) from the outer ring (1) of the bearing. The outer ring (1) of the bearing remains in the supported state in step S2 under the action of the insertion and removal part (6). S5. Place the inner ring (9) of the bearing into the inner hole of the outer ring (1) of the bearing; S6. Remove the insert (6) from the lead-in crack (11) of the outer ring (1) of the bearing, so that the outer ring (1) of the bearing springs back, the lead-in crack (11) closes, and the outer ring (1) of the bearing moves into contact with the inner ring (9). The mounting base (2) is provided with a relief hole (22), and the support (3) includes a tapered pin. The diameter of the small diameter end of the tapered pin is smaller than the diameter of the relief hole (22). When the bearing outer ring (1) is placed on the mounting base (2) in step S1, the inner hole of the bearing outer ring (1) is aligned with the relief hole (22). The tapered pin includes a tapered section (31) and a cylindrical section (32). The tapered section (31) and the cylindrical section (32) are coaxially arranged. The large-diameter end of the tapered section (31) is connected to the cylindrical section (32) and the diameters of the two are equal. In step 2, when the outer ring (1) of the bearing is kept in an open state, the outer wall of the cylindrical section (32) of the tapered pin is in contact with the inner hole wall of the outer ring (1) of the bearing, and the tapered section (31) of the tapered pin is located in the relief hole (22). The mounting base (2) has a groove (23), and the insert (6) is slidably disposed in the groove (23). In step S1, while placing the outer ring (1) of the spherical bearing on the mounting base (2), the guide crack (11) of the outer ring (1) is aligned with the groove (23). In step S3, the insert (6) is pushed to slide along the groove (23) and inserted into the guide crack (11).

2. The assembly process of the spherical plain bearing according to claim 1, characterized in that, In step S3, after inserting the plug-in part (6) into the crack (11) of the outer ring (1) of the bearing, the plug-in part (6) is fixed by the locking device (7).

3. The assembly process of the spherical plain bearing according to claim 2, characterized in that, The locking device (7) includes a threaded through hole (72) opened on the mounting base (2) and a screw (71) threaded in the threaded through hole (72). The threaded through hole (72) is perpendicular to and connected to the slide groove (23). In step S3, after inserting the plug-in part (6) into the lead crack (11) of the outer ring (1) of the bearing, the screw (71) is rotated so that the head of the screw (71) presses against the side wall of the plug-in part (6) so that the plug-in part (6) is fixed in the slide groove (23).

4. The assembly process of the spherical plain bearing according to claim 3, characterized in that, In step S4, the cylindrical section (32) of the tapered pin is pushed by the pressure block (5) so that the tapered pin is disengaged from the inner hole of the outer ring (1) of the bearing and slides into the relief hole (22) of the mounting base (2).

5. The assembly process of the spherical plain bearing according to claim 4, characterized in that, Step S5 includes the following steps: S51. Replace the tapered pin in the clearance hole (22) with the support member (8); S52. Remove the pressure block (5); S53. Place the inner ring (9) of the bearing in the inner hole of the outer ring (1) of the bearing, with the spherical surface of the inner ring (9) abutting against the upper end of the support (8), and the center of the inner ring (9) and the center of the outer ring (1) of the bearing on the same horizontal plane. S54. Press the pressure ring (81) against the upper surface of the outer ring (1) of the bearing.

6. The assembly process of the spherical plain bearing according to claim 5, characterized in that, In step S6, first rotate the screw (71) to separate the head of the screw (71) from the plug (6), and then slide the plug (6) from the lead crack (11) into the groove (23).

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