A complex working condition press bush installation tool

Abstract

The application discloses a complex working condition press-fit bushing installation tool, which comprises an installation part and a box body above the installation part, a plurality of groups of connecting plate assemblies are connected in a straight line on the top of the installation part, the connecting plate assembly comprises two connecting plates connected above the installation part, installation holes are formed through opposite sides of the connecting plates, bushings are inlaid in the installation holes, and a wedge block assembly is arranged in the space formed by the two connecting plates. The installation tool can complete press-fit bushing installation on an ear piece under complex working conditions, the installation process is simple and safe, meanwhile, the press-fit bushing can bring fatigue gain of cold shrink bushing and general interference installation bushing by several times due to large interference, the push-out force of the press-fit bushing from the installation hole is 3-5 times that of the cold shrink bushing and the general interference, and the press-fit bushing is not prone to loosening when running on an airplane, and the reliability is high.

Description

Technical Field

[0001] The present invention belongs to the technical direction of cold extrusion strengthening of structural holes of aerospace aircraft, and specifically relates to a press-fit bushing installation tool under complex working conditions. Background Art

[0002] In China, the installation of complex lugs is mostly done by ordinary interference fit or cold shrink bushing installation;

[0003] At present, the domestic press-fit bushing installation tools are limited to single-ear piece and single-hole installation;

[0004] If ordinary interference fit or shrink fit is used to install the bushing, ordinary interference fit installation requires greater pressure to press the bushing into the ear hole, which requires workers to have higher skills and sufficient space;

[0005] If a cold shrink bushing is used for installation, the bushing must be cooled with liquid nitrogen and then pressed into the mounting hole of the lug within 15 seconds. This operation is difficult, as the temperature of liquid nitrogen can be as low as -200°C, and the installation risk is high.

[0006] Moreover, the interference fit between the cold shrink bushing and the ordinary interference fit bushing is small, the fatigue gain is limited, and it is easy for the bushing to become loose during the operation of the aircraft, resulting in poor reliability. Summary of the Invention

[0007] The purpose of the present invention is to provide a complex working condition press-fit bushing installation tool for existing devices to solve the problems raised in the above background technology.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a complex working condition press-fit bushing installation tool, comprising a mounting portion and a box body located above the mounting portion, wherein a plurality of connecting plate assemblies are connected in a straight line above the mounting portion, wherein the connecting plate assemblies include two connecting plates connected above the mounting portion, wherein mounting holes are formed through opposite sides of the connecting plates, bushings are embedded in the mounting holes, and a wedge assembly is provided inside the space formed by the two connecting plates;

[0009] The first wedge block, the second wedge block, and the third wedge block corresponding to the slope of the wedge block assembly are respectively slidably matched in the vertical direction of the box body, and the upper parts of the first wedge block, the second wedge block, and the third wedge block are connected to a pressing block;

[0010] A plurality of through slots are provided between the upper and lower parts of the box body, the upper end of the wedge block assembly is located inside the through slots, and the first wedge block, the second wedge block, and the third wedge block pass through the through slots and are respectively located in the space formed by every two connecting plates.

[0011] The present invention further describes that the wedge block assembly includes a fourth wedge block, a fifth wedge block, a straight plate, and a sixth wedge block, which are respectively embedded in the space formed by every two adjacent connecting plates. The opposite sides of the fourth wedge block, the fifth wedge block, the straight plate, and the sixth wedge block are penetrated by a first positioning hole and a second positioning hole. The first positioning hole is located above the second positioning hole, and the second positioning hole corresponds to the bushing. A core rod slides in the parallel direction of the bushing and the second positioning hole.

[0012] The present invention further describes that the slope of the first wedge block corresponds to the slope of the fourth wedge block, the slope of the first side of the second wedge block corresponds to the fifth wedge block, the plane of the second side of the second wedge block corresponds to the plane of the straight plate, and the slope of the third wedge block corresponds to the sixth wedge block.

[0013] The present invention further describes that a first threaded hole is provided on one side of the pressure block, a first screw is threadedly engaged with the internal thread of the first threaded hole, second threaded holes are provided on both sides of the box body, a second screw is threadedly engaged in the parallel direction of the second threaded hole, and a spring is sleeved between the first screw and the second screw.

[0014] The present invention further describes that through holes corresponding to the first positioning holes are opened on both sides of the box body, and bolts passing through the through holes and the first positioning holes are threadedly engaged in a direction parallel to the through holes.

[0015] The present invention further describes that openings for sliding of the bolts and screws are provided below the fourth wedge, the fifth wedge, and the sixth wedge, a nut is connected to one side of the box, and the bolts and the nuts are threadedly matched.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This installation tool can complete the installation of press-fit bushings on lugs under complex working conditions. The installation process is simple and safe. At the same time, due to the large interference fit, the press-fit bushing can bring several times the fatigue gain of cold shrink bushings and ordinary interference installation bushings. The push-out force of the press-fit bushing from the mounting hole is 3 to 5 times that of cold shrink bushings and ordinary interference bushings. It is not easy to loosen when running on the aircraft and has high reliability.

[0018] 2. The present invention can change the width of the assembly by moving the wedge block assembly with an inclined surface up and down, support the bushing structure, and prevent the longitudinal movement of the bushing without a shoulder or the deformation of the core rod outlet end of the hole.

[0019] 3. This invention replaces existing shrink sleeves and conventional interference fit sleeves with press-fit sleeves, extending the fatigue life of aircraft structural holes. The press-fit sleeve also offers three to five times the push-out force, increasing aircraft reliability and safety. The press-fit sleeve is simple and easy to install, with a high success rate, eliminating the need for specialized skills and the high risk associated with shrink sleeve installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the exploded structure of the installation tool of the present invention;

[0022] Figure 2 It is a schematic three-dimensional diagram of the combination of the installation tool and the installation part of the present invention;

[0023] Figure 3 is a three-dimensional schematic diagram of the installation tool of the present invention;

[0024] Figure 4 is a schematic cross-sectional view of the installation tool of the present invention;

[0025] Figure 5 is a schematic cross-sectional view of the assembly of the installation tool and the installation portion of the present invention;

[0026] Figure 6 This is a schematic cross-sectional view of the upper portion of the box body of the present invention.

[0027] In the figure: 1. mounting portion; 2. housing; 3. connecting plate; 4. mounting hole; 5. bushing; 6. first wedge; 7. second wedge; 8. third wedge; 9. pressure block; 10. through slot; 11. fourth wedge; 12. fifth wedge; 13. straight plate; 14. sixth wedge; 15. first positioning hole; 16. second positioning hole; 17. core rod; 18. first threaded hole; 19. first screw; 20. second threaded hole; 21. second screw; 22. spring; 23. through hole; 24. bolt; 25. opening; 26. nut. DETAILED DESCRIPTION

[0028] The following is a non-limiting detailed description of the technical solutions of the present invention in conjunction with preferred embodiments and the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0029] See also Figure 1-6The present invention provides a technical solution: a complex working condition press-fit bushing installation tool, comprising a mounting portion 1 and a box body 2 located above the mounting portion 1. The mounting portion 1 is an ear piece in the prior art. A plurality of connecting plate 3 assemblies are connected in a straight line above the mounting portion 1. The connecting plate 3 assembly includes two connecting plates 3 connected above the mounting portion 1. Mounting holes 4 are formed through opposite sides of the connecting plates 3. Bushings 5 ​​are embedded in the mounting holes 4. The bushings 5 ​​are flange bushings 5 ​​with shaft shoulders. A wedge assembly is provided inside the space formed by the two connecting plates 3.

[0030] In the vertical direction of the box body 2, there are respectively slidably fitted with a first wedge block 6, a second wedge block 7, and a third wedge block 8 corresponding to the slope of the wedge block assembly. A pressing block 9 is connected above the first wedge block 6, the second wedge block 7, and the third wedge block 8. A straight groove is provided below the pressing block 9. A straight bar that slides in the vertical direction of the straight groove is provided above the first wedge block 6, the second wedge block 7, and the third wedge block 8. The arrangement of the straight bar and the straight groove prevents the pressing block 9 from falling off.

[0031] A plurality of through slots 10 are provided between the upper and lower parts of the box body 2, and the upper end of the wedge block assembly is located inside the through slot 10. The first wedge block 6, the second wedge block 7, and the third wedge block 8 pass through the through slot 10 and are respectively located in the space formed by each two connecting plates 3. The first wedge block 6, the second wedge block 7, and the third wedge block 8 are slidably fitted in the vertical direction of the through slot 10. By moving the first wedge block 6, the second wedge block 7, and the third wedge block 8 with an inclined surface up and down, the width of the assembly can be changed to support the multiple bushings 5, and the bushings 5 ​​without shaft shoulders can be prevented from moving longitudinally in the mounting hole 4.

[0032] The wedge block assembly includes a fourth wedge block 11, a fifth wedge block 12, a straight plate 13, and a sixth wedge block 14, which are respectively embedded in the space formed by every two adjacent connecting plates 3. The opposite sides of the fourth wedge block 11, the fifth wedge block 12, the straight plate 13, and the sixth wedge block 14 are penetrated by a first positioning hole 15 and a second positioning hole 16. The first positioning hole 15 is located above the second positioning hole 16, and the second positioning hole 16 corresponds to the bushing 5. A core rod 17 slides in the parallel direction of the bushing 5 and the second positioning hole 16. The sixth wedge block 14 is provided with a sliding hole on the side facing the connecting plate 3 that is compatible with the bushing 5.

[0033] The slope of the first wedge block 6 corresponds to the slope of the fourth wedge block 11, the slope of the first side of the second wedge block 7 corresponds to the fifth wedge block 12, the plane of the second side of the second wedge block 7 corresponds to the plane of the straight plate 13, and the slope of the third wedge block 8 corresponds to the sixth wedge block 14.

[0034] A first threaded hole 18 is provided on one side of the pressure block 9, and a first screw 19 is threadedly engaged with the internal thread of the first threaded hole 18. Second threaded holes 20 are provided on both sides of the box body 2, and a second screw 21 is threadedly engaged with the second threaded hole 20 in a direction parallel to the second threaded hole 20. A spring 22 is sleeved between the first screw 19 and the second screw 21. The setting of the spring 22 can improve the stability of the first wedge block 6, the second wedge block 7, and the third wedge block 8 when installed into the through groove 10, thereby improving the stability of the first wedge block 6, the second wedge block 7, and the third wedge block 8 after installation.

[0035] Through holes 23 corresponding to the first positioning holes 15 are provided on both sides of the box body 2. Bolts 24 that pass through the through holes 23 and the first positioning holes 15 are threadedly engaged in the direction parallel to the through holes 23. The arrangement of the bolts 24 can fix the positions of the fourth wedge block 11, the fifth wedge block 12, the straight plate 13, and the sixth wedge block 14, thereby preventing the fourth wedge block 11, the fifth wedge block 12, the straight plate 13, and the sixth wedge block 14 from sliding out of the through slot 10.

[0036] Openings 25 are provided under the fourth wedge block 11, the fifth wedge block 12, and the sixth wedge block 14 for the bolt 24 and the screw to slide. A nut 26 is connected to one side of the box body 2. The bolt 24 and the nut 26 are threadedly matched. The nut 26 is provided to fix the position of the bolt 24, thereby preventing the bolt 24 from sliding along the first positioning hole 15.

[0037] Working principle: When in use, insert the first wedge block 6, the second wedge block 7, and the third wedge block 8 into the interior of the box body 2, and then the first wedge block 6, the second wedge block 7, and the third wedge block 8 will slide from the through slot 10 to the side close to the mounting portion 1, and at the same time insert the fourth wedge block 11, the fifth wedge block 12, the straight plate 13, and the sixth wedge block 14 into the space between the two connecting plates 3, and then insert the fourth wedge block 11, the fifth wedge block 12, the straight plate 13, and the sixth wedge block 14 into the through slot 10, and then an extrusion relationship is generated between the first wedge block 6, the second wedge block 7, the third wedge block 8 and the fourth wedge block 11, the fifth wedge block 12, the straight plate 13, and the sixth wedge block 14, and then use The screw is inserted into the second positioning hole 16, and then the bolt 24 is rotated to create a threaded connection between the bolt 24 and the nut 26. The pressure block 9 equipped with a spring 22 is then pressed onto the first wedge 6, the second wedge 7, and the third wedge 8, and the core rod 17 is passed through the bushing 5 and the second positioning hole 16. Then the pulling is started to make the core rod 17 squeeze the bushing 5, so that the bushing 5 is firmly fixed in the mounting hole 4, thereby completing the fixation of the bushing 5. The width of the assembly can be changed by moving the wedge block assembly with an inclined surface up and down, supporting the bushing 5 structure, and preventing the longitudinal movement of the bushing 5 without a shoulder, or the deformation of the outlet end of the core rod 17 of the hole.

[0038] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0039] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the aforementioned embodiments, or that some of the technical features may be replaced with equivalents. Such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A complex working condition press-fit bushing installation tool, comprising, characterized in that: Mounting portion (1) and its location on the mounting portion (1) The upper box body (2) is connected to a plurality of connecting plate (3) assemblies arranged in a straight line above the mounting portion (1), wherein the connecting plate (3) assembly comprises two connecting plates (3) connected above the mounting portion (1), mounting holes (4) are provided through opposite sides of the connecting plates (3), bushings (5) are embedded in the mounting holes (4), and a wedge assembly is provided inside the space formed by the two connecting plates (3); A first wedge block (6), a second wedge block (7), and a third wedge block (8) corresponding to the slope of the wedge block assembly are slidably fitted in the vertical direction of the box body (2), and a pressing block (9) is connected above the first wedge block (6), the second wedge block (7), and the third wedge block (8); A plurality of through slots (10) are provided between the upper and lower parts of the box body (2), the upper end of the wedge block assembly is located inside the through slot (10), and the first wedge block (6), the second wedge block (7), and the third wedge block (8) pass through the through slot (10) and are respectively located in the space formed by each two connecting plates (3); The wedge block assembly includes a fourth wedge block (11), a fifth wedge block (12), a straight plate (13), and a sixth wedge block (14) respectively embedded in the space formed by every two adjacent connecting plates (3); the fourth wedge block (11), the fifth wedge block (12), the straight plate (13), and the sixth wedge block (14) have a first positioning hole (15) and a second positioning hole (16) formed therethrough on opposite sides; the first positioning hole (15) is located above the second positioning hole (16), and the second positioning hole (16) corresponds to the bushing (5); a core rod (17) is slidable in a direction parallel to the bushing (5) and the second positioning hole (16); Through holes (23) corresponding to the first positioning holes (15) are provided on both sides of the box body (2), and bolts (24) passing through the through holes (23) and the first positioning holes (15) are threadedly engaged in a direction parallel to the through holes (23); An opening (25) for the bolt (24) to slide is provided below the first wedge (6), the second wedge (7), and the third wedge (8). A nut (26) is connected to one side of the box body (2), and the bolt (24) and the nut (26) are threadedly matched.

2. A complex working condition press-fit bushing (5) installation tool according to claim 1, characterized in that: The slope of the first wedge block (6) corresponds to the slope of the fourth wedge block (11), the slope of the first side of the second wedge block (7) corresponds to the fifth wedge block (12), the plane of the second side of the second wedge block (7) corresponds to the plane of the straight plate (13), and the slope of the third wedge block (8) corresponds to the sixth wedge block (14).

3. A complex working condition press-fit bushing (5) installation tool according to claim 1, characterized in that: The briquette A first threaded hole (18) is provided on one side of the housing (9), and a first screw (19) is threadedly engaged with the internal thread of the first threaded hole (18). Second threaded holes (20) are provided on both sides of the housing (2), and a second screw (21) is threadedly engaged with the second threaded hole (20) in a parallel direction. A spring (22) is sleeved between the first screw (19) and the second screw (21).

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