Supporting tool for disassembling bearing of gearbox of airplane auxiliary power device

Abstract

The utility model discloses a supporting tool for disassembling a bearing of a gearbox of an airplane auxiliary power device. The supporting tool comprises a gear, a gear shaft, the bearing, a base, a supporting arm and a chuck used for clamping the bearing. The multiple supporting arms are vertically connected to the outer side of the base, the multiple supporting arms are evenly arranged at intervals in the circumferential direction and form an outer supporting part, and a containing cavity is formed in the inner side of the outer supporting part; when the gear shaft is interfered by the outer supporting part in the descending process of being separated from the bearing under the action of external force, a plurality of supporting columns are arranged on the base, the lower ends of the supporting columns are connected to the base, and the upper ends of the supporting columns penetrate through the de-weighting holes of the gear and are supported at the bottom of the chuck; when the gear shaft is separated from the bearing under external force and then can move downwards into the containing cavity, the outer supporting part is supported at the bottom of the chuck. By the adoption of the device, the chuck can be evenly stressed, the device is suitable for disassembling work of gear shafts and bearings in gears of different specifications and sizes, universality is high, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft auxiliary power devices, in particular to a supporting tool used for disassembling a gearbox bearing of an aircraft auxiliary power device. Background Art

[0002] When the gearbox of the aircraft auxiliary power unit is overhauled, it is necessary to disassemble the gear shafts and bearings of all the gears in the gearbox. During disassembly, first clamp the chuck on the bearing, then support the supporting tooling on the bottom of the chuck, and finally use a manual press to press the gear shaft to separate the gear shaft from the bearing. Since the gear shaft is fixedly connected to the gear, the gear and the gear shaft will be pressed down together, and the bearing will remain on the chuck. However, most of the current supporting tooling is a two-sided supporting tooling, that is, the supporting tooling is supported on both sides of the chuck. When disassembling the gear shaft and the bearing, it is difficult to make the chuck evenly stressed. Long-term use will reduce the service life of the chuck, thereby increasing the cost of tooling maintenance; in addition, when the diameter of the gear is too large, it will hinder the chuck, making it impossible for the two-sided supporting tooling to support the chuck, which is not conducive to the disassembly work. Utility Model Content

[0003] The purpose of the utility model is to provide a supporting tool for disassembling the bearing of the gear box of an aircraft auxiliary power unit, which has strong versatility and good practicality, can make the chuck evenly stressed, and is suitable for the disassembly work of the gear shaft and the bearing in gears of different specifications and sizes.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A support tool for disassembling a bearing of a gearbox of an aircraft auxiliary power unit, comprising a gear, a gear shaft, a bearing, a base, a support arm, and a chuck for clamping the bearing; the gear is fixedly connected to the gear shaft, and the bearing is installed at the end of the gear shaft; a plurality of support arms are provided, and the plurality of support arms are vertically connected to the outer side of the base, and the plurality of support arms are evenly spaced in a circumferential direction to form an outer support portion, and an accommodating cavity is formed on the inner side of the outer support portion;

[0006] When the gear shaft is interfered by the external support part during the downward movement of the gear shaft from the bearing due to external force, the base is provided with a plurality of support columns evenly spaced along the circumferential direction, the lower ends of the support columns are vertically connected to the base, the upper ends of the support columns pass through the deweighting holes of the gear and are supported on the bottom of the chuck; the height of the support columns is greater than the height of the external support part, and the distance between the chuck and the external support part is greater than the downward distance of the gear shaft from the bearing;

[0007] When the gear shaft is separated from the bearing by external force and can move downward into the accommodating cavity, the outer support portion is supported on the bottom of the chuck; the depth of the accommodating cavity is greater than the downward distance of the gear shaft from the bearing.

[0008] As a preferred solution of the present invention, the support column is detachably connected to the base.

[0009] As a preferred solution of the utility model, the base is provided with a plurality of mounting holes for the lower ends of the support columns to be inserted into.

[0010] As a preferred solution of the utility model, the mounting holes include multiple first mounting holes and multiple second mounting holes; the multiple first mounting holes and the multiple second mounting holes are evenly spaced along the circumferential direction, and the second mounting holes are located outside the first mounting holes.

[0011] As a preferred solution of the present invention, the number of the first mounting holes is consistent with the number of the second mounting holes, and the hole diameter of the first mounting hole is consistent with the hole diameter of the second mounting hole.

[0012] As a preferred solution of the present utility model, the support arm and the base are an integrated structure.

[0013] As a preferred solution of the present utility model, the support column, the support arm and the base are all made of stainless steel.

[0014] The support tooling for disassembling the gearbox bearing of an aircraft auxiliary power unit provided by the utility model has the following beneficial effects compared with the prior art:

[0015] When the utility model is working, by changing the number and position of the support columns connected to the base, the gear shaft and bearing in the gears of different sizes can be disassembled, and the utility model has strong versatility and good practicality. When it is necessary to disassemble the gear shaft and bearing of the gear with large mass or volume, the bearing is clamped in the chuck, the lower end of the support column is connected to the base, the upper end of the support column passes through the deweighting hole of the large gear and is supported at the bottom of the chuck, and the gear shaft is pressed by a manual press to separate the gear shaft from the bearing, and the bearing remains on the chuck, and the gear and the gear shaft are pressed down together until the gear falls on the upper surface of the outer support part. On the one hand, compared with the two-sided support tooling in the prior art, the deweighting holes on the large gear for reducing weight and inertia can be fully utilized to avoid the large gear from hindering the support of the chuck, thereby improving the utilization rate of space; on the other hand, since the support columns are evenly arranged along the circumferential direction, the chuck can be evenly stressed, thereby extending the service life of the chuck. When it is necessary to disassemble the gear shaft and bearing of a small gear, the bearing is clamped in the chuck, and all support columns are removed to accommodate the small gear in the accommodating cavity. The external support part is supported on the bottom of the chuck, and the gear shaft is pressed by a manual press to separate the gear shaft from the bearing. The bearing remains on the chuck, and the gear and gear shaft are pressed into the accommodating cavity together. Since the external support part is formed by multiple support arms evenly spaced along the circumferential direction, the chuck can be evenly stressed, thereby extending the service life of the chuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0017] Figure 1 It is a schematic diagram of the structure when the support column is supported on the chuck;

[0018] Figure 2 is a schematic diagram of the structure when the outer support portion is supported on the chuck;

[0019] Figure 3 is a schematic diagram of the structure when the support column is connected to the first mounting hole;

[0020] Figure 4 It is a schematic diagram of the structure when the support column is connected to the second mounting hole.

[0021] Markings in the figure:

[0022] 1. Base; 11. First mounting hole; 12. Second mounting hole; 2. Support column; 3. External support portion; 31. Support arm; 4. Accommodating cavity; 5. Gear; 51. Deweighting hole; 52. Gear shaft; 6. Chuck; 7. Bearing. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. It should be understood that the terms "first", "second", etc. are used in the present utility model to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0025] please Figures 1 to 4 The preferred embodiment of the utility model provides a support tooling for disassembling the bearing of the gearbox of an aircraft auxiliary power unit, which includes a gear 5, a gear shaft 52, a bearing 7, a base 1, a support arm 31 and a chuck 6 for clamping the bearing 7; the gear 5 is fixedly connected to the gear shaft 52, and the bearing 7 is installed at the end of the gear shaft 52; the support arm 31 is provided with a plurality of support arms 31, and the plurality of support arms 31 are vertically connected to the outer side of the base 1, and the plurality of support arms 31 are evenly spaced along the circumferential direction to form an outer support portion 3, and a receiving cavity 4 is formed on the inner side of the outer support portion 3.

[0026] When the gear shaft 52 is interfered by the external support part 3 during the downward process of being separated from the bearing 7 by external force, the base 1 is provided with a plurality of support columns 2 evenly spaced along the circumferential direction, the lower ends of the support columns 2 are vertically connected to the base 1, and the upper ends of the support columns 2 pass through the deweighting holes 51 of the gear 5 and are supported on the bottom of the chuck 6; the height of the support columns 2 is greater than the height of the external support part 3, and the distance between the chuck 6 and the external support part 3 is greater than the downward distance of the gear shaft 52 when it is separated from the bearing 7.

[0027] When the gear shaft 52 is separated from the bearing 7 by external force and can move downward into the accommodating cavity 4, the outer support portion 3 is supported on the bottom of the chuck 6; the depth of the accommodating cavity 4 is greater than the distance that the gear shaft 52 moves downward after escaping from the bearing 7.

[0028] According to the support tool for disassembling the gearbox bearing of the aircraft auxiliary power unit of the utility model, by changing the number and position of the support columns 2 connected to the base 1 during operation, the gear shafts and bearings in gears of different sizes can be disassembled, and the utility model has strong versatility and good practicality. Figure 1 As shown, when it is necessary to disassemble the gear 5 with a large mass or volume, the bearing 7 is clamped on the chuck 6, the lower end of the support column 2 is connected to the base 1, and the upper end of the support column 2 passes through the deweighting hole 51 of the large gear 5 and is supported on the bottom of the chuck 6. The gear shaft 52 is pressed by a manual press to separate the gear shaft 52 from the bearing 7. The bearing 7 remains on the chuck 6, and the gear 5 and the gear shaft 52 are pressed down together until the gear 5 falls on the upper surface of the outer support part 3. On the one hand, compared with the two-sided support tooling in the prior art, it can make full use of the deweighting holes on the large gears for reducing weight and inertia, avoid the large gears from hindering the support of the chuck, and improve the utilization rate of space; on the other hand, because the support columns 2 are evenly arranged along the circumferential direction, the chuck 6 can be evenly stressed, thereby extending the service life of the chuck 6. Figure 2 As shown, when it is necessary to disassemble the gear shaft 52 and the bearing 7 of the small gear 5, the bearing 7 is clamped in the chuck 6, and all the support columns 2 are removed to accommodate the small gear 5 in the accommodating cavity 4. The outer support part 3 is supported on the bottom of the chuck 6, and the gear shaft 52 is pressed by a manual press to separate the gear shaft 52 from the bearing 7. The bearing 7 remains on the chuck 6, and the gear 5 and the gear shaft 52 are pressed into the accommodating cavity 4 together. Since the outer support part 3 is formed by a plurality of support arms 31 evenly spaced along the circumferential direction, the chuck 6 can be evenly stressed, thereby extending the service life of the chuck 6.

[0029] It should be noted that, since the height of the support column 2 is greater than the height of the outer support part 3, the distance between the chuck 6 and the outer support part 3 is greater than the distance that the gear shaft 52 escapes from the bearing 7 and goes downward, so there is enough travel between the chuck 6 and the outer support part 3 for the large gear 5 to be pressed down; since the depth of the accommodating chamber 4 is greater than the distance that the gear shaft 52 escapes from the bearing 7 and goes downward, there is enough travel in the accommodating chamber 4 for the small gear 5 to be pressed down.

[0030] Exemplarily, the support column 2 is detachably connected to the base 1. In this embodiment, Figure 3 to Figure 4As shown, the base 1 is provided with a plurality of mounting holes for the lower end of the support column 2 to be inserted; the mounting holes include a plurality of first mounting holes 11 and a plurality of second mounting holes 12; the plurality of first mounting holes 11 and the plurality of second mounting holes 12 are evenly spaced along the circumferential direction, and the second mounting holes 12 are located outside the first mounting holes 11. Thus, the operator can connect the support column 2 to the first mounting hole 11 or the second mounting hole 12 according to different work requirements to adapt to large gears 5 of different diameters. Furthermore, the number of the first mounting holes 11 is consistent with the number of the second mounting holes 12 (preferably 5), and the aperture of the first mounting hole 11 is consistent with the aperture of the second mounting hole 12. Thus, by setting a set of support columns 2, the support requirements of large gears of different diameters can be met, and the cost is correspondingly reduced.

[0031] It should be noted that when the support column 2 is inserted into the first mounting hole 11, it is suitable for the disassembly of the bearing of the lubricating pump gear of the auxiliary power unit of 131-9A and 131-9B aircraft; when the support column 2 is inserted into the second mounting hole 12, it is suitable for the disassembly of the bearing of the oil-gas separator gear and the generator gear of the auxiliary power unit of 131-9B aircraft; when all the support columns 2 are disassembled and the outer support part 3 is supported on the chuck 6, it is suitable for the disassembly of the bearing 7 of the high-speed pinion, clutch gear and the generator gear of the auxiliary power unit of 131-9A aircraft.

[0032] Exemplarily, for the convenience of production, the support arm 31 and the base 1 are an integral structure; the material of the support column 2, the support arm 31 and the base 1 are preferably stainless steel, which can improve the structural strength of the support tooling and is more convenient to use.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A support fixture for disassembling a gearbox bearing of an aircraft auxiliary power unit, characterized in that: It includes a gear, a gear shaft, a bearing, a base, a support arm and a chuck for clamping the bearing; the gear is fixedly connected to the gear shaft, and the bearing is installed at the end of the gear shaft; there are multiple support arms, and the multiple support arms are vertically connected to the outside of the base, and the multiple support arms are evenly spaced along the circumferential direction to form an outer support part, and an accommodating cavity is formed on the inner side of the outer support part; When the gear shaft is interfered by the external support part during the downward movement of the gear shaft from the bearing due to external force, the base is provided with a plurality of support columns evenly spaced along the circumferential direction, the lower ends of the support columns are vertically connected to the base, the upper ends of the support columns pass through the deweighting holes of the gear and are supported on the bottom of the chuck; the height of the support columns is greater than the height of the external support part, and the distance between the chuck and the external support part is greater than the downward distance of the gear shaft from the bearing; When the gear shaft is separated from the bearing by external force and can move downward into the accommodating cavity, the outer support portion is supported on the bottom of the chuck; the depth of the accommodating cavity is greater than the downward distance of the gear shaft from the bearing.

2. The supporting tool for disassembling the gearbox bearing of an aircraft auxiliary power unit according to claim 1, characterized in that: The support column is detachably connected to the base.

3. The supporting tool for disassembling the gearbox bearing of an aircraft auxiliary power unit according to claim 2, characterized in that: The base is provided with a plurality of mounting holes for the lower ends of the support columns to be inserted into.

4. The supporting tool for disassembling the gearbox bearing of an aircraft auxiliary power unit according to claim 3, characterized in that: The mounting holes include a plurality of first mounting holes and a plurality of second mounting holes; the plurality of first mounting holes and the plurality of second mounting holes are evenly spaced along a circumferential direction, and the second mounting holes are located outside the first mounting holes.

5. The supporting tool for disassembling the gearbox bearing of an aircraft auxiliary power unit according to claim 4, characterized in that: The number of the first mounting holes is consistent with the number of the second mounting holes, and the hole diameter of the first mounting hole is consistent with the hole diameter of the second mounting hole.

6. The supporting tool for disassembling the gearbox bearing of an aircraft auxiliary power unit according to claim 1, characterized in that: The support arm and the base are an integrated structure.

7. The supporting tool for disassembling the gearbox bearing of an aircraft auxiliary power unit according to claim 1, characterized in that: The support column, the support arm and the base are all made of stainless steel.

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