Forging device for forging shaft of undercarriage

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By designing a forging device for aircraft landing gear shafts, the ladder shaft is directly formed by the cooperation of wall sleeve components and plug-in components, the problem of subsequent lathe processing of the shaft body in the prior art is solved, and the material utilization rate and dimensional accuracy are improved.

CN222552045UActive Publication Date: 2025-03-04ZHEJIANG SHENFA HEAVY IND MASCH TECH CO LTD

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Patent Information

Application Number: CN202420687822.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-04-07
Publication Date: 2025-03-04
Estimated Expiration: 2034-04-07

AI Technical Summary

Technical Problem

When the prior art is forging the aircraft landing gear shaft body, it is only processed to a unified outer diameter, and the step shaft needs to be processed in the lathe later, resulting in an increase in the lathe cutting volume and an increase in material loss.

Method used

A forging device for landing gear forging shaft is designed, including a wall sleeve assembly and a plug-in assembly, through which the wall sleeve assembly moves in the axial direction and inserts and impacts the plug-in along the axis to form a step shaft to reduce the amount of subsequent turning.

Benefits of technology

The forged shaft is directly formed into a stepped shaft, which reduces the amount of subsequent turning, improves material utilization, and improves the outer diameter uniformity and dimensional accuracy of the forged shaft.

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Abstract

The forging device comprises a wall sleeve assembly and an insertion cylinder assembly, the wall sleeve assembly can move in the axial direction, a cavity is formed in the wall sleeve assembly, an opening is formed in one axial side of the wall sleeve assembly, the other axial side of the wall sleeve assembly is closed, the opening is located at one axial end of the cavity, and the insertion cylinder assembly comprises an insertion cylinder. The insertion cylinder and the wall sleeve assembly are coaxial, the insertion cylinder is located on one side of an opening of the wall sleeve assembly, the insertion cylinder can move along the axis, the insertion cylinder can be inserted into the opening when approaching the wall sleeve assembly, the insertion cylinder assembly further comprises a first insertion block, and the first insertion block can block the end, away from the opening, of the insertion cylinder. According to the forging device of the undercarriage forging shaft, a stepped shaft is directly formed after forging, the follow-up turning amount is reduced, and the material utilization rate is increased.

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Description

Technical Field

[0001] The utility model relates to the technical field of shaft forging equipment, in particular to a forging device for a landing gear forging shaft. Background Art

[0002] At present, the shafts used in aircraft landing gear are usually forged. The forged shafts have excellent mechanical properties and can improve impact resistance to match the huge impact force generated when the aircraft falls. The shafts have a varying outer diameter along the axial direction and have stepped shafts. The shafts are usually only processed to a uniform outer diameter during the forging process, and then the stepped shafts are processed on the lathe, which increases the amount of cutting on the lathe and increases material loss. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a forging device for a landing gear forged shaft, which can directly form a stepped shaft after forging, reduce the subsequent turning amount, and improve material utilization.

[0004] The utility model provides a forging device for a landing gear forging shaft, comprising a wall sleeve component and an insert sleeve component. The wall sleeve component can move axially, a cavity is arranged in the wall sleeve component, an opening is arranged on one axial side of the wall sleeve component, the other axial side of the wall sleeve component is closed, the opening is located at one axial end of the cavity, the insert sleeve component comprises an insert sleeve, the insert sleeve is coaxial with the wall sleeve component, the insert sleeve is located at one side of the opening of the wall sleeve component, the insert sleeve can move along the axis, and the insert sleeve can be inserted into the opening when it is close to the wall sleeve component. The insert sleeve component also comprises a first insert block, and the first insert block can block the end of the insert sleeve away from the opening.

[0005] The wall sleeve assembly comprises a first wall sleeve and a second wall sleeve located on both sides in the radial direction. Both the first wall sleeve and the second wall sleeve can move radially along the wall sleeve assembly so that the first wall sleeve and the second wall sleeve are closer to or farther away from each other.

[0006] The wall sleeve assembly is also located in the third wall sleeve at the bottom, the third wall sleeve is provided with a third wall surface, the first wall sleeve is provided with a first wall surface, the second wall sleeve is provided with a second wall surface, and the first wall surface, the second wall surface and the third wall surface circumferentially surround the cavity.

[0007] The first wall sleeve includes a first stopper, and the second wall sleeve includes a second stopper. The first stopper and the second stopper are located at one end of the cavity axially away from the opening, so that the end of the cavity axially away from the opening is closed.

[0008] The inserting tube is axially provided with a through hole.

[0009] The outer diameter of the insert matches the outer diameter of the cavity.

[0010] A slide is connected to the end of the insert tube away from the opening, and the slide is connected to a second insert block. The second insert block is inserted into the slide and can move axially along the slide. The second insert block can abut the first insert block on the side close to the insert tube. When the second insert block moves toward the side close to the insert tube, the first insert block can be inserted into the insert tube.

[0011] The wall sleeve assembly is fixedly connected to the second substrate, the second substrate is slidably connected to the first substrate, the second substrate is connected to the third driving component, and the third driving component can drive the second substrate to move axially along the wall sleeve assembly.

[0012] The first wall sleeve and the second wall sleeve are respectively connected to a first driving component, and the first driving component drives the first wall sleeve and the second wall sleeve to move.

[0013] Beneficial effects of the utility model:

[0014] 1. The insert is inserted into the opening multiple times under the drive of the second driving component and hits the cone, so that the cone forms a stepped surface. At the same time, due to the restraining effect of the cavity, the radial dimension of the first shaft body changes when it is hit axially, so that the outer diameter of each position of the first shaft body is more matched with the outer diameter of the cavity, and the uniformity of the outer diameter of the first shaft body is improved, which is beneficial to reduce the cutting amount of turning processing and improve material utilization.

[0015] 2. When the insert hits the cone, the first insert hits one end of the second shaft at the same time, so that the outer diameter of the second shaft is more compatible with the inner diameter of the insert, so as to improve the dimensional accuracy of the outer diameter of the second shaft.

[0016] 3. Since the forged shaft body is relatively long, the first wall sleeve and the second wall sleeve that can move radially are provided to facilitate opening the mold cavity to place the forged shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of an embodiment Figure 1 ;

[0018] Figure 2 for Figure 1 Sectional view along the MM direction;

[0019] Figure 3 is a cross-sectional view of a forged shaft body in an embodiment;

[0020] Figure 4 A top view of an embodiment Figure 2 .

[0021] Figure markings: base assembly 1, first substrate 11, second substrate 12, third substrate 13, first driving component 2, wall sleeve assembly 3, first wall sleeve 31, first wall surface 311, first stop portion 312, second wall sleeve 32, second wall surface 321, second stop portion 322, third wall sleeve 33, third wall surface 331, cavity 34, opening 35, insert cylinder assembly 4, slide plate 41, insert cylinder 42, through hole 421, first insert block 43, second insert block 44, second driving component 45, forged shaft body 5, first shaft body 51, second shaft body 52, cone 53. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] like Figure 1 , Figure 2 As shown, a forging device for a landing gear forging shaft includes a wall sleeve component 3, the wall sleeve component 3 is a cylindrical structure, a cavity 34 is provided in the wall sleeve component 3, and an opening 35 (i.e. Figure 1 The wall sleeve assembly 3 is axially closed on the other side (i.e. Figure 1 The cavity 34 is a circular hole, and the opening 35 is located at one axial end of the cavity 34 (i.e. Figure 1 The forged shaft body 5 can be installed in the cavity 34. The forged shaft body 5 is in the shape of a long shaft and is a part of an aircraft landing gear. The axial length of the forged shaft body 5 is generally greater than 1 meter. Figure 3 As shown, after preliminary forging, the forged shaft body 5 forms a first shaft body 51 , a second shaft body 52 and a tapered portion 53 between the first shaft body 51 and the second shaft body 52 , and the diameter of the first shaft body 51 is greater than that of the second shaft body 52 .

[0024] like Figure 1 As shown, the first shaft body 51 is inserted into the cavity 34, the outer diameter of the first shaft body 51 matches the inner diameter of the cavity 34, and the axial length of the first shaft body 51 is smaller than the axial length of the cavity 34. The second shaft body 52 extends out of the opening 35 to the right.

[0025] like Figure 1 , Figure 2 As shown, the wall sleeve assembly 3 is installed on the base assembly 1. Specifically, as shown in Figure 2 As shown, the base assembly 1 includes a first base plate 11 at the bottom, a second base plate 12 is slidably connected to the upper end of the first base plate 11, and the bottom of the wall sleeve assembly 3 is fixedly connected to the upper end of the second base plate 12. Figure 1As shown, a third driving component 6 is connected to the left side of the second substrate 12 , and the third driving component 6 is a cylinder. Driven by the third driving component 6 , the second substrate 12 can slide left and right and drive the wall sleeve assembly 3 to move, and the moving direction is along the axial direction of the wall sleeve assembly 3 .

[0026] like Figure 2 As shown, the wall sleeve assembly 3 includes a first wall sleeve 31, a second wall sleeve 32 and a third wall sleeve 33 located on both sides in the radial direction, the first wall sleeve 31 is provided with a first wall surface 311 along the radial inner side of the wall sleeve assembly 3, the second wall sleeve 32 is provided with a second wall surface 321 along the radial inner side of the wall sleeve assembly 3, and the third wall sleeve 33 is provided with a third wall surface 331 along the radial inner side of the wall sleeve assembly 3. The first wall surface 311, the second wall surface 321 and the third wall surface 331 are spliced to form a circular hole shape, and the first wall surface 311, the second wall surface 321 and the third wall surface 331 circumferentially surround the cavity 34.

[0027] like Figure 2 As shown, the bottom of the third wall sleeve 33 is fixedly connected to the upper end of the second substrate 12, the third substrate 13 is installed on both sides of the upper end of the second substrate 12, and the first driving component 2 is installed on the upper end of the third substrate 13. The first driving component 2 is a cylinder, and the output ends of the first driving component 2 on both sides are respectively connected to the first wall sleeve 31 and the second wall sleeve 32. Under the drive of the first driving component 2, the first wall sleeve 31 and the second wall sleeve 32 can move radially along the wall sleeve assembly 3 to make the first wall sleeve 31 and the second wall sleeve 32 approach each other or move away from each other.

[0028] like Figure 2 As shown, when the first wall sleeve 31 and the second wall sleeve 32 move away from each other, an opening is formed at the upper end of the cavity 34, and the first shaft body 51 is inserted downward from the top of the cavity 34. After insertion, the bottom surface of the first shaft body 51 abuts against the third wall surface 331. After abutment, the first wall sleeve 31 and the second wall sleeve 32 approach each other, so that the first wall surface 311, the second wall surface 321, and the third wall surface 331 wrap the first shaft body 51.

[0029] like Figure 1 As shown, the first wall sleeve 31 includes a first stopper 312, and the second wall sleeve 32 includes a second stopper 322. The first stopper 312 and the second stopper 322 are located at the end of the cavity 34 axially away from the opening 35. The first stopper 312 and the second stopper 322 are both semi-disc-shaped structures, and after being spliced, a complete disk is formed. The outer diameter of the disk matches the outer diameter of the wall sleeve assembly 3, so that the end of the cavity 34 axially away from the opening 35 is closed. After the first shaft body 51 is installed in the cavity 34, one axial end of the first shaft body 51 abuts against the first stopper 312 and the second stopper 322.

[0030] like Figure 1As shown, the first substrate 11 is installed with an insert assembly 4, which includes an insert 42, which is coaxial with the wall sleeve assembly 3 and is located on one side of the opening 35 of the wall sleeve assembly 3 (i.e. Figure 1 The insert sleeve 42 is provided with a through hole 421, and the inner diameter of the through hole 421 matches the outer diameter of the second shaft body 52 (that is, the outer diameter of the insert sleeve 42 matches the outer diameter of the cavity 34). After the forged shaft body 5 is installed in the cavity 34, the second shaft body 52 can be inserted into the through hole 421 under the drive of the third driving component 6.

[0031] The insert tube 42 can move along the axis. Specifically, the end of the insert tube 42 away from the opening 35 is connected to a slide plate 41. The slide plate 41 is slidably connected to the first base plate 11. The slide plate 41 is installed with a second driving component 45. The second driving component 45 is a cylinder. Under the drive of the second driving component 45, the slide plate 41 moves left and right to drive the insert tube 42 to move left and right. When the insert tube 42 moves to the left and approaches the wall sleeve assembly 3, it can be inserted into the opening 35. Figure 3 , Figure 4 The insert 42 is driven by the second driving member 45 to repeatedly insert into the opening 35 and hit the cone 53, so that the cone 53 forms Figure 4 At the same time, due to the restraining effect of the cavity 34, the radial dimension of the first shaft body 51 changes when it is hit axially, so that the outer diameter of each position of the first shaft body 51 is more compatible with the outer diameter of the cavity 34, and the uniformity of the outer diameter of the first shaft body 51 is improved, which is conducive to reducing the cutting amount of turning processing and improving material utilization.

[0032] like Figure 1 As shown, the slide plate 41 is threadedly connected with the second plug block 44, the second plug block 44 is inserted into the end of the slide plate 41 away from the insert tube 42, the first plug block 43 is slidably connected in the through hole 421, the first plug block 43 is inserted into the through hole 421 and blocks the end of the through hole 421 away from the opening 35, and the first plug block 43 can slide axially along the inner wall of the through hole 421. The second plug block 44 can abut against the first plug block 43 on the side close to the insert tube 42.

[0033] like Figure 1 As shown, by adjusting the depth of the second plug block 44 screwed into the side close to the insert tube 42, the limit position of the first plug block 43 moving along the axial right direction of the through hole 421 can be adjusted. Figure 3 , Figure 4 When the insert 42 hits the cone 53, the first insert block 43 hits the right end of the second shaft 52 at the same time, so that the outer diameter of the second shaft 52 is deformed and more closely matches the inner diameter of the insert 42, thereby improving the dimensional accuracy of the outer diameter of the second shaft 52.

[0034] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A forging device for a landing gear forged shaft, characterized in that: The invention comprises a wall sleeve component (3) and an insert sleeve component (4), wherein the wall sleeve component (3) is movable in the axial direction, a cavity (34) is arranged inside the wall sleeve component (3), an opening (35) is arranged on one axial side of the wall sleeve component (3), the other axial side of the wall sleeve component (3) is closed, and the opening (35) is located at one axial end of the cavity (34); the insert sleeve component (4) comprises an insert sleeve (42), the insert sleeve (42) is coaxial with the wall sleeve component (3), the insert sleeve (42) is located on one side of the opening (35) of the wall sleeve component (3), the insert sleeve (42) is movable along the axis, and the insert sleeve (42) can be inserted into the opening (35) when it is close to the wall sleeve component (3); the insert sleeve component (4) further comprises a first insert block (43), and the first insert block (43) can block the end of the insert sleeve (42) away from the opening (35).

2. A forging device for a landing gear forged shaft according to claim 1, characterized in that: The wall sleeve assembly (3) comprises a first wall sleeve (31) and a second wall sleeve (32) located on both sides in a radial direction, and the first wall sleeve (31) and the second wall sleeve (32) are both capable of moving radially along the wall sleeve assembly (3) so that the first wall sleeve (31) and the second wall sleeve (32) are moved closer to or farther away from each other.

3. A forging device for a landing gear forged shaft according to claim 2, characterized in that: The wall sleeve assembly (3) is also provided with a third wall sleeve (33) at the bottom, the third wall sleeve (33) being provided with a third wall surface (331), the first wall sleeve (31) being provided with a first wall surface (311), the second wall sleeve (32) being provided with a second wall surface (321), and the first wall surface (311), the second wall surface (321), and the third wall surface (331) circumferentially surrounding the mold cavity (34).

4. A forging device for a landing gear forged shaft according to claim 3, characterized in that: The first wall sleeve (31) comprises a first stop portion (312), and the second wall sleeve (32) comprises a second stop portion (322). The first stop portion (312) and the second stop portion (322) are located at an end of the mold cavity (34) axially away from the opening (35), so that the end of the mold cavity (34) axially away from the opening (35) is closed.

5. The forging device for a landing gear forged shaft according to claim 1, characterized in that: The insert cylinder (42) is axially provided with a through hole (421).

6. The forging device for a landing gear forged shaft according to claim 1, characterized in that: The outer diameter of the insert sleeve (42) matches the outer diameter of the cavity (34).

7. The forging device for a landing gear forged shaft according to claim 1, characterized in that: The insert cylinder (42) is connected to a slide plate (41) at one end away from the opening (35), and the slide plate (41) is connected to a second insert block (44). The second insert block (44) is inserted into the slide plate (41) and can move axially along the slide plate (41). The second insert block (44) can abut against the first insert block (43) on the side close to the insert cylinder (42). When the second insert block (44) moves toward the side close to the insert cylinder (42), the first insert block (43) can be inserted into the insert cylinder (42).

8. The forging device for a landing gear forged shaft according to claim 1, characterized in that: The wall sleeve assembly (3) is fixedly connected to a second substrate (12), the second substrate (12) is slidably connected to the first substrate (11), the second substrate (12) is connected to a third driving component (6), and the third driving component (6) is capable of driving the second substrate (12) to move axially along the wall sleeve assembly (3).

9. A forging device for a landing gear forged shaft according to claim 2, characterized in that: The first wall sleeve (31) and the second wall sleeve (32) are respectively connected to a first driving component (2), and the first driving component (2) drives the first wall sleeve (31) and the second wall sleeve (32) to move.