Retracting, pressing and fastening device for knuckle bearing of main supporting rod

Abstract

The device comprises a bearing bush, a first axial flange is arranged on the inner side of one end of the bearing bush, a first radial flange is arranged on the outer side of one end of the bearing bush, the outer side face of the first axial flange is a conical face, and the diameter of the first axial flange is gradually reduced in the protruding direction; a second radial flange is arranged on the inner side of the other end of the bearing bush, a second axial flange is arranged on the outer side of the other end of the bearing bush, the inner side face of the second axial flange is a conical face, the diameter of the second axial flange is gradually increased in the protruding direction, the first axial flange can be folded inwards after being pressed, and the second axial flange can be unfolded outwards after being pressed. When the device is used, the knuckle bearing is firstly mounted in the bearing bush, and the first axial flange is pressed towards the inner side, so that the knuckle bearing can be fastened in the bearing bush; and then the bearing bush is installed in the installation hole of the single-lug connector, and finally the second axial flange is compressed and unfolded towards the outer side, so that the bearing bush is fixed to the single-lug connector of the main supporting rod, the structure is reasonable, and folding and pressing are convenient.

Description

Technical Field

[0001] The invention relates to a strut of a main reducer of an aircraft, and in particular to a compression and fastening device of a main strut joint bearing. Background Art

[0002] like Figure 1 As shown in the figure, the existing design of the main support rod is to install a bushing on a single-ear joint. The rod size of this component is relatively large, with a total length of more than 1500 mm. After the main support rod is assembled and used, as the equipment vibrates, the bolts installed in the bushing will swing irregularly with the vibration of the transmission mechanism, causing the bushing to be damaged faster and need to be replaced regularly. Replacing the double-ear bushing requires multiple disassembly and installation, resulting in frequent maintenance and high maintenance costs.

[0003] like Figure 2 As shown in the figure, there is an arc mating surface between the inner and outer rings of the spherical plain bearing, which facilitates the universal swing of the inner and outer rings of the bearing within a certain range, and the mating parts are plated with hard chrome, which makes the bearing have good wear resistance, low friction and low noise. Figure 1 The bushing shown is replaced with Figure 2 The spherical bearing shown in the figure, when the bolt in the spherical bearing hole produces irregular axial swing due to the vibration of the transmission mechanism, the inner and outer rings of the spherical bearing slide along with the bolt, which can greatly increase the installed use hours of the main support rod and improve the reliability of the equipment.

[0004] The installation of large spherical bearings, especially those with main struts exceeding 1500 mm in length, generally requires the use of dedicated large-scale equipment. Purchasing dedicated large-scale equipment will undoubtedly increase the company's investment in fixed assets, especially when the number of main struts that need to be installed with spherical bearings is limited. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a main support rod joint bearing compression and fastening device which has a reasonable structure, is convenient for compression, and is beneficial for reducing the investment of enterprises.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A compression and fastening device for a main strut joint bearing comprises a bearing sleeve, wherein a first axial flange is provided on the inner side of one end of the bearing sleeve and a first radial flange is provided on the outer side, the outer side surface of the first axial flange is a conical surface and the diameter gradually decreases along the protruding direction, and a second radial flange is provided on the inner side of the other end of the bearing sleeve and a second axial flange is provided on the outer side, the inner side surface of the second axial flange is a conical surface and the diameter gradually increases along the protruding direction, the first axial flange can be retracted inwardly after being compressed, and the second axial flange can be expanded outwardly after being compressed.

[0008] As a further improvement of the above technical solution: a transition fillet is provided between the first axial flange and the first radial flange, and a transition fillet is provided between the second axial flange and the second radial flange.

[0009] As a further improvement of the above technical solution: the material of the bearing bushing is 1Cr18Ni9Ti stainless steel.

[0010] As a further improvement of the above technical solution: it also includes a folding and rolling mechanism, which includes a clamping handle, a core shaft arranged on the clamping handle, a rolling bearing arranged on the core shaft and a rolling wheel arranged on the outer periphery of the rolling bearing.

[0011] As a further improvement of the above technical solution: the rolling wheel includes a mounting portion and a rolling portion, the mounting portion is arranged on the outer periphery of the rolling bearing, the rolling portion is arranged at an end of the mounting portion away from the clamping handle, the rolling portion is a conical structure and the diameter increases as the distance from the mounting portion increases, and the outer side surface and the end face of the rolling portion are connected by a rounded corner.

[0012] As a further improvement of the above technical solution: it also includes an unfolding spinning mechanism and a support seat, the unfolding spinning mechanism includes a mounting seat, an end cover and a plurality of first balls, one end face of the mounting seat is provided with an annular raceway, the end cover is connected to the mounting seat to install the plurality of first balls in the annular raceway, the other end face of the mounting seat is provided with a first clamping portion, one end face of the support seat is provided with a first positioning portion that cooperates with the inner hole of the joint bearing, and the other end face of the support seat is provided with a second clamping portion.

[0013] As a further improvement of the above technical solution: one end surface of the mounting seat is provided with a second positioning portion that matches the inner hole of the spherical bearing, the annular raceway is located outside the second positioning portion, and the first positioning portion is provided with a second ball.

[0014] As a further improvement of the above technical solution: the unfolding spinning mechanism is provided with multiple ones, the distance between the centers of two first balls symmetrically distributed in the annular raceway is L, and L of each unfolding spinning mechanism gradually increases.

[0015] As a further improvement of the above technical solution: the end cover and the mounting seat are fixedly connected by a plurality of welding points distributed along the circumferential direction.

[0016] As a further improvement of the above technical solution: the first positioning portion and the second positioning portion are both provided with a guide cone angle.

[0017] Compared with the prior art, the advantages of the present invention are: when using the compression and fixing device of the main support rod joint bearing disclosed in the present invention, the joint bearing is first installed in the bearing sleeve, the joint bearing is axially positioned by the second radial flange, the first axial flange is pressed inwardly, and cooperated with the second radial flange, the joint bearing can be fixed in the bearing sleeve without hindering the normal swing of the inner ring of the joint bearing; then the bearing sleeve is installed in the mounting hole of the single-ear joint of the main support rod, the bearing sleeve is axially positioned by the first radial flange, and finally the second axial flange is pressed outwardly and unfolded, and cooperated with the first radial flange, the bearing sleeve can be fixed on the single-ear joint of the main support rod; the first axial flange and the second axial flange adopt a specific conical structure, which is conducive to reducing the external force required for folding and unfolding, and at the same time is conducive to making the thickness of each part consistent after folding and unfolding, the structure is reasonable, the compression is convenient, and there is no need to use special large-scale equipment, which is conducive to reducing the fixed asset investment of the enterprise.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an existing main support rod, wherein part a is a main view and part b is a cross-sectional view.

[0020] Figure 2 It is a structural diagram of a spherical bearing, where part a is the main view and part b is the cross-sectional view.

[0021] Figure 3 It is a structural schematic diagram of the bearing bushing in the present invention.

[0022] Figure 4 It is a structural schematic diagram of a spherical plain bearing installed in a bearing bushing.

[0023] Figure 5 It is a schematic diagram of the structure after the first axial flange is retracted inward.

[0024] Figure 6 It is a schematic diagram of the structure after the second axial flange is expanded outward.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the gathering and rolling mechanism in the present invention.

[0026] Figure 8 It is a schematic cross-sectional structural diagram of the gathering and rolling mechanism in the present invention.

[0027] Fig. 9 It is a structural schematic diagram of the working state of the gathering and rolling mechanism in the present invention.

[0028] Fig.10It is a three-dimensional structural schematic diagram of the unfolding spinning mechanism in the present invention.

[0029] Fig.11 It is a schematic diagram of the cross-sectional structure of the mounting seat in the present invention.

[0030] Fig.12 It is a schematic cross-sectional structural diagram of the support seat in the present invention.

[0031] Fig.13 It is a structural schematic diagram of the working state of the unfolding spinning mechanism in the present invention.

[0032] The symbols in the figure represent:

[0033] 1. Main support rod; 11. Casing; 12. Single-ear joint; 13. Double-ear joint; 14. Bushing;

[0034] 2. Spherical bearing; 21. Inner ring; 22. Outer ring;

[0035] 3. Bearing bushing; 31. First axial flange; 32. First radial flange; 33. Second radial flange; 34. Second axial flange; 35. Transition fillet;

[0036] 4. folding rolling mechanism; 41. clamping handle; 42. mandrel; 43. rolling bearing; 44. rolling wheel; 441. mounting part; 442. rolling part;

[0037] 5. Spinning mechanism; 51. Mounting seat; 52. End cover; 53. First ball; 54. Annular raceway; 55. First clamping part; 56. Second positioning part;

[0038] 6. Support seat; 61. First positioning portion; 62. Second clamping portion; 63. Second ball bearing;

[0039] 7. Washer. DETAILED DESCRIPTION

[0040] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Figures 3 to 12 An embodiment of the compression and fastening device of the main strut joint bearing of the present invention is shown. The compression and fastening device of the main strut joint bearing of this embodiment includes a bearing bushing 3, a first axial flange 31 is provided on the inner side of one end of the bearing bushing 3, and a first radial flange 32 is provided on the outer side. The outer side surface of the first axial flange 31 is a conical surface and the diameter gradually decreases along the convex direction (see Figure 3 The first axial flange 31 faces the right side of the bearing bushing 3, and the diameter of the outer side thereof gradually decreases from left to right). The other end of the bearing bushing 3 is provided with a second radial flange 33 on the inner side and a second axial flange 34 on the outer side. The inner side of the second axial flange 34 is a conical surface and the diameter gradually increases along the convex direction (see Figure 3 , the second axial flange 34 faces the left side of the bearing bushing 3, and the diameter of its inner side surface gradually increases from right to left). The first axial flange 31 can be retracted inwardly after being compressed, and the second axial flange 34 can be expanded outwardly after being compressed.

[0045] When the compression and fastening device of the main support rod joint bearing of this embodiment is used, the joint bearing 2 is first installed in the bearing bushing 3 (specifically as shown in FIG. Figure 4 As shown), the spherical bearing 2 is axially positioned by the second radial flange 33, and the first axial flange 31 is pressed inwardly to cooperate with the second radial flange 33, so that the spherical bearing 2 can be fixed in the bearing bushing 3 (as shown in detail). Figure 5As shown), and does not hinder the normal swing of the inner ring 21 of the spherical bearing 2; then install the bearing bushing 3 in the mounting hole of the single ear joint 12 of the main support rod 1, axially position the bearing bushing 3 through the first radial flange 32, and finally press the second axial flange 34 outward and expand it to cooperate with the first radial flange 32, so that the bearing bushing 3 can be fixed on the single ear joint 12 of the main support rod 1 (as shown in detail). Figure 6 As shown); the first axial flange 31 and the second axial flange 34 adopt a specific conical structure, which is beneficial to reducing the external force required for folding and unfolding, and at the same time, it is beneficial to make the thickness of each part consistent after folding and unfolding, the structure is reasonable, the compression is convenient, and there is no need to use special large-scale equipment, which is beneficial to reducing the fixed asset investment of the enterprise.

[0046] See Figure 3 Further, in this embodiment, a transition fillet 35 is provided between the first axial flange 31 and the first radial flange 32, and a transition fillet 35 is provided between the second axial flange 34 and the second radial flange 33. The provision of the transition fillet 35 is conducive to rolling, avoiding the generation of cracks and stress concentration, and the structure is simple and effective.

[0047] As a preferred embodiment, the material of the bearing bushing 3 is 1Cr18Ni9Ti stainless steel. Using 1Cr18Ni9Ti stainless steel is convenient for making the bearing bushing 3 in a soft state, and is also conducive to rolling deformation to avoid cracks and stress concentration. Of course, in other embodiments, the bearing bushing 3 can also be made of other materials.

[0048] See Figure 7 and Figure 8 Furthermore, in this embodiment, the compression and fastening device of the main support rod joint bearing also includes a folding and rolling mechanism 4, which includes a clamping handle 41, a core shaft 42 arranged on the clamping handle 41, a rolling bearing 43 arranged on the core shaft 42, and a rolling wheel 44 arranged on the outer periphery of the rolling bearing 43.

[0049] See Fig. 9 When working, the outer cylindrical surface of the bearing bushing 3 is clamped on the three-jaw chuck of the horizontal lathe, and the first radial flange 32 is close to the end face of the clamping claw. The clamping handle 41 is installed on the lathe tool holder, the lathe is started, the gear is engaged, the lathe spindle rotates at a low speed in the positive direction, the lathe large pallet is adjusted, the lathe small pallet is locked, and the lathe middle pallet is moved, driving the rolling wheel 44 to gradually feed from the outside to the inside, and the first axial flange 31 is gradually retracted inward by the pressure of the rolling wheel 44, and the spherical bearing 2 is fixed in the bearing bushing 3 by the second radial flanges 33 at both ends and the retracted first axial flange 31. The retracting rolling mechanism 4 can complete the rolling of the first axial flange 31 using a horizontal lathe without the need for special large equipment.

[0050] See Figure 8 Further, in this embodiment, the rolling wheel 44 includes a mounting portion 441 and a rolling portion 442. The mounting portion 441 is disposed on the outer periphery of the rolling bearing 43, and the rolling portion 442 is disposed at one end of the mounting portion 441 away from the clamping handle 41. The rolling portion 442 is a conical structure and the diameter increases as it is farther from the mounting portion 441 ( Figure 8 In the figure, the rolling part 442 is located at the left end of the mounting part 441, and the diameter of the rolling part 442 gradually increases from right to left, and the outer side surface and the end surface of the rolling part 442 are connected by a rounded corner. This type of contoured rolling wheel 44 is convenient to cooperate with the outer side surface of the first axial flange 31 and apply pressure, which is conducive to ensuring the rolling effect.

[0051] See Figures 10 to 12 In this embodiment, the compression and fastening device of the main support rod joint bearing also includes an unfolding spinning mechanism 5 and a support seat 6. The unfolding spinning mechanism 5 includes a mounting seat 51, an end cover 52 and a plurality of first balls 53. An annular raceway 54 is provided on one end face of the mounting seat 51. The end cover 52 is connected to the mounting seat 51 to install the plurality of first balls 53 (specifically 20) in the annular raceway 54. A first clamping portion 55 is provided on the other end face of the mounting seat 51. A first positioning portion 61 that cooperates with the inner hole of the joint bearing 2 is provided on one end face of the support seat 6. A second clamping portion 62 is provided on the other end face of the support seat 6.

[0052] See Fig.13 When working, install the bearing bushing 3 with the compressed joint bearing 2 into the mounting hole of the single ear joint 12 of the main support rod 1, and install the washer 7; the outer cylindrical surface of the second clamping part 62 at the left end of the support seat 6 is clamped on the three-jaw centering chuck of the lathe, the shoulder of the shaft is close to the end face of the clamping claw, and the inner hole of the joint bearing 2 is installed on the outer cylindrical surface of the first positioning part 61 at the right end of the support seat 6; a drill chuck is installed on the tailstock of the lathe. The mounting seat 51 is installed in the inner claw of the drill chuck through the first clamping part 55 at the right end and locked in the drill chuck. Rotate the handwheel of the tailstock of the lathe, and the drill chuck in the sleeve of the tailstock drives the unfolding spinning mechanism 5 to move to the left, and the first ball 53 is pressed against the conical surface of the second axial flange 34 of the bearing bushing 3. The sleeve 11 in the middle of the main support rod 1 is against the middle support plate of the lathe, limiting the main support rod 1 from rotating downward, preventing the lathe from rotating forward, and the main support rod 1 also rotates. Engage the low-speed forward gear and start the lathe. The spindle drives the three-jaw chuck and the support seat 6 to rotate at a low speed. The handwheel of the lathe tailstock is rotated counterclockwise. The drill chuck in the tailstock sleeve drives the unfolding spinning mechanism 5 to move left. The first ball 53 rotates in the annular raceway 54 and spins the second axial flange 34, causing it to gradually deform.

[0053] Furthermore, in this embodiment, one end surface of the mounting seat 51 is provided with a second positioning portion 56 that matches with the inner hole of the spherical bearing 2, the annular raceway 54 is located outside the second positioning portion 56, and the first positioning portion 61 is provided with a second ball 63. When the unfolding and spinning mechanism 5 moves to the left as a whole, the second positioning portion 56 enters the inner hole of the spherical bearing 2 until the left end surface of the second positioning portion 56 hits the second ball 63 of the first positioning portion 61, and the second ball 63 can rotate to prevent the unfolding and spinning mechanism 5 from continuing to move to the left. The second ball 63 cooperates with the second positioning portion 56 to control the deformation of the second axial flange 34, and the structure is reasonable and effective.

[0054] Furthermore, in this embodiment, three unfolding spinning mechanisms 5 are provided, and the distance between the centers of two first balls 53 symmetrically distributed in the annular raceway 54 is L, and L of the three unfolding spinning mechanisms 5 gradually increases, and the specific values ​​of L are 33.4 mm, 34.2 mm and 35.2 mm.

[0055] During operation, after the first-stage spinning mechanism 5 is completed, turn the lathe tailstock handwheel clockwise, and the drill chuck in the tailstock sleeve drives the first-stage spinning mechanism 5 to move right and return, remove the first-stage spinning device, and install the second-stage spinning device. Turn the lathe tailstock handwheel counterclockwise to perform the second-stage spinning operation. After the second-stage spinning mechanism 5 is completed, turn the lathe tailstock handwheel clockwise, and the drill chuck in the tailstock sleeve drives the second-stage spinning mechanism 5 to move right and return, loosen the drill chuck with a key, remove the second-stage spinning mechanism 5, and install the third-stage spinning mechanism 5. Turn the lathe tailstock handwheel counterclockwise to perform the third-stage spinning operation. After the third-stage spinning is completed, the spherical bearing 2 can be firmly locked on the main support rod 1.

[0056] The multi-stage unfolding spinning mechanism 5 is used to relay the rolling bearing bushing 3 to fix the spherical bearing 2 on the main support rod 1, thereby solving the problem of installing and fixing the spherical bearing 2 of long support rods and thin-walled single-ear joint components.

[0057] As a preferred embodiment, the end cover 52 and the mounting seat 51 are fixedly connected by a plurality of welding points distributed along the circumferential direction, which has a simple structure and reliable fixation.

[0058] As a preferred embodiment, both the first positioning portion 61 and the second positioning portion 56 are provided with a guide cone angle, so that the first positioning portion 61 and the second positioning portion 56 can accurately enter the inner hole of the spherical bearing 2, and the structure is simple and effective.

[0059] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A compression and fastening device for a main support rod joint bearing, characterized in that: The invention comprises a bearing bushing (3), wherein a first axial flange (31) is provided on the inner side of one end of the bearing bushing (3) and a first radial flange (32) is provided on the outer side, the outer side surface of the first axial flange (31) is a conical surface and the diameter gradually decreases along the convex direction, and a second radial flange (33) is provided on the inner side of the other end of the bearing bushing (3) and a second axial flange (34) is provided on the outer side, the inner side surface of the second axial flange (34) is a conical surface and the diameter gradually increases along the convex direction, the first axial flange (31) can be retracted inwardly after being compressed, and the second axial flange (34) can be expanded outwardly after being compressed.

2. The compression and fastening device for the main support rod joint bearing according to claim 1, characterized in that: A transition fillet (35) is provided between the first axial flange (31) and the first radial flange (32), and a transition fillet (35) is provided between the second axial flange (34) and the second radial flange (33).

3. The compression and fastening device for the main support rod joint bearing according to claim 1, characterized in that: The material of the bearing bushing (3) is 1Cr18Ni9Ti stainless steel.

4. The compression and fastening device for the main support rod joint bearing according to any one of claims 1 to 3, characterized in that: The invention also comprises a folding and rolling mechanism (4), wherein the folding and rolling mechanism (4) comprises a clamping handle (41), a core shaft (42) arranged on the clamping handle (41), a rolling bearing (43) arranged on the core shaft (42), and a rolling wheel (44) arranged on the outer periphery of the rolling bearing (43).

5. The compression and fastening device for the main support rod joint bearing according to claim 4 is characterized in that: The rolling wheel (44) comprises a mounting portion (441) and a rolling portion (442); the mounting portion (441) is arranged on the outer periphery of the rolling bearing (43); the rolling portion (442) is arranged at an end of the mounting portion (441) away from the clamping handle (41); the rolling portion (442) is a conical structure and its diameter increases as it is farther from the mounting portion (441); and the outer side surface and the end surface of the rolling portion (442) are connected via a rounded corner.

6. The compression and fastening device for the main support rod joint bearing according to any one of claims 1 to 3, characterized in that: It also includes an unfolding spinning mechanism (5) and a support seat (6), wherein the unfolding spinning mechanism (5) includes a mounting seat (51), an end cover (52) and a plurality of first balls (53), one end surface of the mounting seat (51) is provided with an annular raceway (54), the end cover (52) is connected to the mounting seat (51) so as to mount the plurality of first balls (53) in the annular raceway (54), the other end surface of the mounting seat (51) is provided with a first clamping portion (55), one end surface of the support seat (6) is provided with a first positioning portion (61) that matches the inner hole of the spherical bearing (2), and the other end surface of the support seat (6) is provided with a second clamping portion (62).

7. The compression and fastening device for the main support rod joint bearing according to claim 6, characterized in that: One end surface of the mounting seat (51) is provided with a second positioning portion (56) that matches the inner hole of the spherical bearing (2), the annular raceway (54) is located outside the second positioning portion (56), and the first positioning portion (61) is provided with a second ball (63).

8. The compression and fastening device for the main support rod joint bearing according to claim 6, characterized in that: The unfolding spinning mechanism (5) is provided with a plurality of them, the distance between the centers of two first balls (53) symmetrically distributed in the annular raceway (54) is L, and L of each unfolding spinning mechanism (5) gradually increases.

9. The compression and fastening device for the main support rod joint bearing according to claim 6, characterized in that: The end cover (52) and the mounting seat (51) are fixedly connected via a plurality of welding points distributed along the circumferential direction.

10. The compression and fastening device for the main support rod joint bearing according to claim 7, characterized in that: The first positioning portion (61) and the second positioning portion (56) are both provided with a guide cone angle.

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