Shaft hub assembly mounting device and method

Abstract

The application discloses an axle core support assembly assembling device and method, and belongs to the technical field of axle core support assembly assembling device and method. The axle core support assembly assembling device comprises an opening and closing mechanism, which can penetrate through the inner hole of the inner cone and axially limit the inner cone. The opening and closing mechanism is coaxially connected with an opening and closing mechanism adjusting mechanism, which is used for controlling the action of the opening and closing mechanism and circumferentially limiting the inner cone. A self-locking nut tightening wrench is arranged outside the opening and closing mechanism adjusting mechanism. The self-locking nut tightening wrench can drive the self-locking nut to rotate. The self-locking nut tightening wrench and the opening and closing mechanism adjusting mechanism can extend to the outside of the axle core. The application can axially and circumferentially limit the inner cone of the axle core support assembly, and can also separately drive the self-locking nut to rotate and operate outside the axle core. Therefore, the application improves the assembling efficiency of the axle core support assembly and meets the assembling requirements of the axle core support assembly.

Description

Technical Field

[0001] This invention belongs to the field of mechanical parts assembly technology, specifically a device and method for assembling a shaft support assembly. Background Technology

[0002] In the field of turbofan engines, shaft support assemblies are widely used to support the low-pressure turbine shaft and the shaft ventilation pipe. During assembly, both locking and force limiting at the shaft center are required. Due to the small inner diameter of the low-pressure turbine shaft, assembly is challenging. Specifically, for example... Figure 1 As shown, the current shaft support assembly includes an inner cone 21, a self-locking nut 22, and a support 20. The support 20 is generally a fully disassembled elastic structure. During assembly, the support assembly is placed inside the shaft, and the self-locking nut 22 is tightened to allow the support 20 to slide and expand on the inner cone 21. After the outer diameter of the support 21 increases, it is fixed to the shaft. During assembly, the inner cone 21 needs to be stopped and the self-locking nut 22 needs to be tightened with torque according to the tightening requirements. Because the radial dimension of the aero-engine shaft is small and the axial dimension is large, it is difficult to stop and tighten the self-locking nut 22, resulting in low assembly efficiency and difficulty in ensuring assembly quality. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention aims to provide an assembly device and method for shaft support assemblies. The present invention can improve the assembly efficiency of shaft support assemblies and meet the assembly requirements of aero-engine shaft support assemblies.

[0004] The technical solution adopted in this invention is as follows:

[0005] An assembly device for a shaft support assembly includes an opening and closing mechanism that can penetrate the inner hole of an inner cone and axially limit the inner cone. The opening and closing mechanism is coaxially connected to an adjusting mechanism, which controls the action of the opening and closing mechanism and circumferentially limits the inner cone. A self-locking nut tightening wrench is sleeved on the outside of the adjusting mechanism, which can drive the self-locking nut to rotate. Both the self-locking nut tightening wrench and the adjusting mechanism can extend to the outside of the shaft.

[0006] Preferably, the opening and closing mechanism includes a positioning shaft. One end of the positioning shaft is connected to the opening and closing mechanism adjustment mechanism, and the other end of the positioning shaft is rotatably connected to a hook-shaped pressure plate. The hook-shaped pressure plate has a groove on the side facing the central axis of the positioning shaft, and a flange on the side away from the central axis of the positioning shaft. A pull rod head passes through the central axis of the positioning shaft. One end of the pull rod head is connected to the opening and closing mechanism adjustment mechanism, and the other end of the pull rod head is provided with a drive disc. The outer edge of the drive disc extends into the groove. The drive disc can drive the hook-shaped pressure plate to rotate around the shaft so that the flange abuts against the large end face of the inner cone to axially limit the inner cone, or to release the flange from axially limiting the inner cone.

[0007] Preferably, the positioning shaft includes a solid section and a hollow section. One end of the solid section and one end of the hollow section are coaxially connected. The other end of the solid section is connected to the opening and closing mechanism adjustment mechanism. The inner cone can be fitted onto the outside of the hollow section. The side wall of the hollow section is provided with a mounting hole for mounting a hook-shaped pressure plate. The hook-shaped pressure plate is connected to the hollow section shaft at the mounting hole. When the drive disc drives the hook-shaped pressure plate to rotate around the shaft, the flange can extend from the mounting hole and abut against the large end face of the inner cone, thereby axially limiting the inner cone. Alternatively, the flange can rotate into the mounting hole to release the axial limitation of the inner cone.

[0008] Preferably, the pull rod head passes through the center hole of the solid section, and the side wall of the pull rod head is provided with a first limiting pin on the part located on both sides of the solid section. By limiting the first limiting pin, the drive disc can be kept embedded in the groove.

[0009] Preferably, the opening and closing mechanism adjustment mechanism includes a spindle, a pull rod, and a pull rod drive mechanism. The spindle is a hollow structure, with one end fixedly connected to the end of the positioning shaft. The end of the spindle connected to the positioning shaft is limited to the small end of the inner cone to limit the inner cone circumferentially. The pull rod is coaxially arranged in the inner cavity of the spindle, with one end connected to the pull rod head. The other end of the spindle and the other end of the pull rod are both connected to the pull rod drive mechanism, which can drive the pull rod to reciprocate along the axial direction.

[0010] Preferably, the small end face of the inner cone is provided with an inner cone positioning groove, and the end of the mandrel is provided with positioning teeth that can be embedded in the inner cone positioning groove.

[0011] Preferably, the pull rod drive mechanism includes a support block, one end of which is fixedly connected to a spindle. A limit cylinder is connected to the other side of the support block and the spindle. The pull rod passes through the axis of the support block and the limit cylinder. The limit cylinder is provided with a limiting angle block and a bushing. The pull rod has an elongated groove for the limiting angle block to be inserted. The limiting angle block can prevent the pull rod from rotating around the axis of the pull rod. A limit nut is threaded onto the pull rod. The limit nut passes through the limit cylinder. One end of the limit nut in the limit cylinder is provided with a limiting flange. The radial dimension of the limiting flange is larger than the diameter of the through hole on the limit cylinder through which the limit nut passes. One end of the bushing abuts against the limiting angle block, and the other end of the bushing abuts against the limiting flange.

[0012] Preferably, the self-locking nut tightening wrench includes a wrench sleeve and an adapter sleeve, both of which are sleeved on the outside of the mandrel. One end of the wrench sleeve can be sleeved on the self-locking nut and drive the self-locking nut to rotate. The other end of the wrench sleeve is connected to one end of the adapter sleeve. The surface of the adapter sleeve is bent inward to form multiple positioning concave rings. The positioning concave rings are in contact with the outer surface of the mandrel, or there is a gap between the inner enveloping cylindrical surface formed by all the positioning concave rings and the outer wall of the mandrel.

[0013] Preferably, the adapter sleeve has at least two positioning threaded holes evenly opened in the circumference of the positioning concave ring, and an annular limiting block is fitted on the outside of the adapter sleeve. The limiting block has through holes in the circumference opposite to the positioning threaded holes. Each through hole is provided with a hand-tightening bolt. The hand-tightening bolt is threadedly connected to the positioning threaded hole. The surface of the mandrel is provided with an annular groove for the end of the hand-tightening bolt to be inserted. When the end of the hand-tightening bolt is inserted into the annular groove, it can restrict the axial movement of the adapter sleeve. At the same time, the end of the wrench sleeve is fitted on the self-locking nut.

[0014] The present invention also provides a method for assembling a shaft support assembly, comprising the following steps:

[0015] The inner cone is fitted onto the opening and closing mechanism of the shaft support assembly device as described above and extends into the shaft. The self-locking nut tightening wrench and the opening and closing mechanism adjustment mechanism both extend to the outside of the shaft.

[0016] The opening and closing mechanism is controlled by the adjusting mechanism, which limits the axial movement of the inner cone and the circumferential movement of the inner cone.

[0017] Rotate the part of the self-locking nut tightening wrench located outside the shaft to drive the self-locking nut to rotate. After the self-locking nut rotates, it drives the bracket to move on the inner cone until the bracket is assembled in place.

[0018] Then, the opening and closing mechanism adjustment mechanism controls the opening and closing mechanism to release the upward limit of the inner cone axis; then, the entire shaft support assembly is pulled out, and at the same time, the opening and closing mechanism adjustment mechanism releases the circumferential limit of the inner cone axis.

[0019] The present invention has the following beneficial effects:

[0020] In the shaft support assembly device of this invention, the opening and closing mechanism can penetrate the inner hole of the inner cone and axially limit the inner cone. This facilitates easy installation of the entire device with the shaft support assembly, and allows the opening and closing mechanism to be withdrawn from the inner hole of the inner cone after the shaft support assembly is installed, thus enabling the entire shaft support assembly device to be separated from the shaft support assembly. The opening and closing mechanism adjustment mechanism controls the action of the opening and closing mechanism, specifically controlling whether to axially limit or release the axial limit on the inner cone. By adjusting the opening and closing mechanism to circumferentially limit the inner cone, the self-locking nut rotates while the inner cone does not rotate, ensuring that the locking nut moves axially on the inner cone to push the support to move and expand on the inner cone. Simultaneously, the circumferential limit on the inner cone by the opening and closing mechanism adjustment mechanism is only officially released when the entire shaft support assembly device is withdrawn from the shaft. Since both the self-locking nut tightening wrench and the opening / closing mechanism adjustment mechanism can extend to the outside of the shaft, this invention can achieve circumferential and axial limiting of the inner cone from the outside of the shaft, while also facilitating operation. Furthermore, this invention solves the problem that the small radial dimension and large axial dimension of the aero-engine shaft lead to difficulties in stopping and tightening the self-locking nut, resulting in low assembly efficiency and difficulty in ensuring assembly quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a typical existing shaft support assembly.

[0022] Figure 2 Here is a schematic diagram of a typical support structure;

[0023] Figure 3 This is a schematic diagram of the assembly device for the shaft support assembly in use according to an embodiment of the present invention;

[0024] Figure 4(a) is Figure 3 Enlarged schematic diagram of part A in the middle; Figure 4(b) is Figure 3 Enlarged schematic diagram of section B in the middle.

[0025] In the diagram, 1-mandrel, 1-1-annular groove, 2-wrench sleeve, 3-adapter sleeve, 3-1-positioning concave ring, 4-conical end fixing screw, 5-positioning shaft, 5-1-solid section, 5-2-hollow section, 6-hook-shaped pressure plate, 6-1-groove, 6-2-flange, 7-hinge shaft, 8-pull rod head, 8-1-drive disc, 9-first limit pin, 10-pin, 11-pull rod, 12-... - Limiting block, 12-1- Hand-tightening bolt, 13- Support block, 14- Angle limiting block, 15- Limiting cylinder, 16- Limiting nut, 16-1- Limiting flange, 17- Bushing, 18- Inner angle head screw, 19- Screw, 20- Bracket, 20-1- Bracket opening, 21- Inner cone, 21-1- Inner cone positioning groove, 22- Self-locking nut, 23- Shaft, 24- Shaft support assembly. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] The purpose of this invention is to specifically provide an assembly device for an aircraft engine shaft support assembly. This purpose is achieved through the following steps:

[0028] 1) Design the assembly route for the dedicated shaft support assembly, arrange the assembly sequence reasonably, and ensure quick and efficient assembly.

[0029] 2) Design special fixtures to ensure that the bracket assembly is placed in the designated position as required and to stop the rotation of the inner cone.

[0030] 3) Design a special tightening wrench that can tighten the self-locking nut and, together with the clamp, complete the assembly of the bracket assembly in the narrow space inside the shaft.

[0031] See Figure 3 Since the radial dimension of the aero-engine shaft is small and the axial dimension is large, it is a slender structure. Therefore, the overall structure of the shaft support assembly device of this invention is also a slender structure.

[0032] For details, see Figure 1 - Figure 4(b), the assembly device for the shaft support assembly in this embodiment includes an opening and closing mechanism (such as... Figure 3 The positioning shaft 5, hook-shaped pressure plate 6, and pull rod head 8 shown in the diagram) can penetrate the inner hole of the inner cone 21 and can axially limit the inner cone 21 (e.g., Figure 3 As shown, the right end face of the flange 6-2 of the hook-shaped pressure plate 6 abuts against the large end face of the inner cone 21, realizing the axial positioning of the inner cone 21. The opening and closing mechanism is coaxially connected to the opening and closing mechanism adjustment mechanism (see Figure 4). The opening and closing mechanism adjustment mechanism is used to control the action of the opening and closing mechanism and to circumferentially limit the inner cone 21. A self-locking nut tightening wrench is sleeved on the outside of the opening and closing mechanism adjustment mechanism. The self-locking nut tightening wrench can drive the self-locking nut to rotate. Both the self-locking nut tightening wrench and the opening and closing mechanism adjustment mechanism can extend to the outside of the shaft 23.

[0033] The method for assembling a shaft support assembly using the shaft support assembly device described in this embodiment includes the following process:

[0034] The inner cone is fitted onto the opening and closing mechanism of the shaft support assembly device as described above and extends into the shaft 23. The self-locking nut tightening wrench and the opening and closing mechanism adjustment mechanism both extend to the outside of the shaft 23.

[0035] The opening and closing mechanism is controlled by the opening and closing mechanism adjustment mechanism, so that the opening and closing mechanism limits the axial direction of the inner cone (21), and the opening and closing mechanism limits the circumferential direction of the inner cone (21) through the opening and closing mechanism adjustment mechanism.

[0036] Rotate the part of the self-locking nut tightening wrench located outside the shaft 23 to drive the self-locking nut 22 to rotate. After the self-locking nut 22 rotates, it drives the bracket 20 to move on the inner cone 21 until the bracket 20 is assembled in place.

[0037] Then, the opening and closing mechanism adjustment mechanism controls the opening and closing mechanism to release the axial limit of the inner cone 21; then the entire shaft support assembly is pulled out, and at the same time the circumferential limit of the opening and closing mechanism adjustment mechanism on the inner cone 21 is released.

[0038] As an optional solution to the above embodiments, such as Figure 3 As shown in Figure 4(a), in this embodiment, the opening and closing mechanism includes a positioning shaft 5. The right end of the positioning shaft 5 (as shown in Figure 4(b)) is connected to the left end of the opening and closing mechanism adjustment mechanism. The left end of the positioning shaft 5 is rotatably connected to a hook-shaped pressure plate 6. The hook-shaped pressure plate 6 has a groove 6-1 on the side facing the central axis of the positioning shaft 5. The hook-shaped pressure plate 6 has a flange 6-2 on the side away from the central axis of the positioning shaft 5. The pull rod head 8 passes through the central axis of the positioning shaft 5. The right end of the pull rod head 8 is connected to the opening and closing mechanism adjustment mechanism. The other end of the pull rod head 8 is provided with a drive disk 8-1. The outer edge of the drive disk 8-1 extends into the groove 6-1. The drive disk 8-1 can drive the hook-shaped pressure plate 6 to rotate around the rotating shaft so that the flange 6-2 abuts against the large end face of the inner cone 21 to axially limit the inner cone 21, or so that the flange 6-2 releases the axial limit on the inner cone 21. In this embodiment, when the opening and closing mechanism adjustment mechanism pulls the pull rod head 8 to move to the right, the drive disk 8-1 causes the hook-shaped pressure plate 6 to rotate counterclockwise. At this time, the flange 6-2 on the hook-shaped pressure plate 6 moves counterclockwise and simultaneously moves towards the central axis of the positioning shaft 5, thereby releasing the restriction on the large end face of the inner cone 21 and thus releasing the circumferential restriction on the inner cone 21. When the opening and closing mechanism adjustment mechanism pushes the pull rod head 8 to move to the left, the drive disk 8-1 causes the hook-shaped pressure plate 6 to rotate clockwise. At this time, the flange 6-2 on the hook-shaped pressure plate 6 moves clockwise and simultaneously moves away from the central axis of the positioning shaft 5 (i.e., outward). At this time, the right side of the flange 6-2 abuts against the large end face of the inner cone 21, thereby restricting the inner cone 21 from moving to the left, thus realizing the axial positioning and restriction of the inner cone 21.

[0039] In the above embodiments, one or more hook-shaped pressure plates 6 can be provided. When multiple hook-shaped pressure plates 6 are used, the multiple hook-shaped pressure plates 6 are evenly arranged along the circumference of the positioning axis 5 to ensure the stability of the axial positioning of the inner cone 21.

[0040] As an optional solution to the above embodiments, such as Figure 3 As shown in Figure 4(a), in this embodiment, the positioning shaft 5 includes a solid section 5-1 and a hollow section 5-2. The left end of the solid section 5-1 and the right end of the hollow section 5-2 are coaxially connected. The right end of the solid section 5-1 is connected to the opening and closing mechanism adjustment mechanism. The inner cone 21 can be fitted onto the outside of the hollow section 5-2. When assembling the shaft support assembly, the inner cone 21 is fitted onto the outside of the hollow section 5-2 and then pushed to the installation position in the shaft 23. A mounting hook-shaped pressure plate is provided on the side wall of the hollow section 5-2. The mounting hole 6 connects the hook-shaped pressure plate 6 to the hollow section 5-2 via a hinge shaft 7. The axis of the hinge shaft 7 is perpendicular to the axis of the hollow section 5-2. When the drive disc 8-1 drives the hook-shaped pressure plate 6 to rotate around the hinge shaft 7, the flange 6-2 can extend from the mounting hole and abut against the large end face of the inner cone 21, thereby axially limiting the inner cone 21. Alternatively, the flange 6-2 can rotate into the mounting hole to release the axial limitation on the inner cone 21. In this case, the flange 6-2 does not protrude from the surface of the hollow section 5-2. In this invention, the inner cavity of the hollow section 5-2 provides storage space for the hook-shaped pressure plate 6.

[0041] As an optional solution of the above embodiment, as shown in FIG4(a), in this embodiment, the pull rod head 8 passes through the central hole of the solid section 5-1. The side wall of the pull rod head 8 is provided with a first limiting pin 9 on the part located on both sides of the solid section 5-1. By limiting the first limiting pin 9, the drive disk 8-1 can be kept embedded in the groove 6-1. This can ensure that the drive disk 8-1 always has the ability to drive the hook-shaped pressure plate 6, thereby preventing the situation where the axial limiting of the inner cone 21 cannot be released because the flange 6-2 cannot be rotated into the mounting hole after the shaft support assembly is installed in place.

[0042] As an optional solution of the above embodiment, as shown in Figures 4(a) and 4(b), in this embodiment, the opening and closing mechanism adjustment mechanism includes a spindle 1, a pull rod 11, and a pull rod drive mechanism. The spindle 1 is a hollow structure. The left end of the spindle 1 is fixedly connected to the right end of the positioning shaft 5. Specifically, the left end of the spindle 1 is sleeved on the right end of the solid section 5-1 and fixedly connected by screws. The left end of the spindle 1 is limitedly connected to the small end (i.e., the right end) of the inner cone 21 to limit the inner cone 21 circumferentially. The pull rod 11 is coaxially arranged in the inner cavity of the spindle 1. The left end of the pull rod 11 is connected to the pull rod head 8. The right end of the spindle 1 and the right end of the pull rod 11 are both connected to the pull rod drive mechanism. The pull rod drive mechanism can drive the pull rod 11 to reciprocate along the axial direction. In this embodiment, the mandrel 1 can be used to circumferentially limit the small end of the inner cone 21, and the pull rod drive mechanism can be used to drive the pull rod 11 to move axially, thereby pushing the pull rod head 8 to move, thus realizing the rotation of the hook-shaped pressure plate 6, and thus realizing the axial limitation and release of the inner cone 21.

[0043] As an optional solution of the above embodiment, as shown in Figure 4(a), in this embodiment, the left end of the pull rod 11 and the right end of the pull rod head 8 can be connected by a plug-in connection. A pin 10 passes through the plug-in connection to achieve axial positioning of the pull rod 11 and the pull rod head 8. This section is detachable. When disassembly is required, the pin 10 can be removed to separate the pull rod 11 from the pull rod head 8.

[0044] As an optional solution to the above embodiments, in this embodiment, the limiting connection between the mandrel 1 and the inner cone 21 can adopt the following structure: Specifically, see Figure 1 As shown in Figure 4, the small end face of the inner cone 21 has an inwardly opening inner cone positioning groove 21-1, and the end of the mandrel 1 has positioning teeth (not shown in the figure) that can be inserted into the inner cone positioning groove 21-1. This structure facilitates the mandrel 1 to limit the inner cone 21. During insertion, the positioning teeth at the end of the mandrel 1 are inserted into the inner cone positioning groove 21-1 to achieve circumferential limitation of the inner cone 21 by the mandrel 1. When the shaft support assembly assembly device is pulled out, the positioning teeth at the end of the mandrel 1 are pulled out from the inner cone positioning groove 21-1, thus releasing the circumferential limitation on the inner cone 21.

[0045] As an optional embodiment of the above, referring to Figure 4(b), in this embodiment, the pull rod drive mechanism includes a support block 13. The left end of the support block 13 is fixedly connected to the right end of the spindle 1 by a screw 19. The right side of the support block 13 is connected to a limiting cylinder 15 by an internal angle head screw 18. The pull rod 11 passes through the axis of the support block 13 and the limiting cylinder 15. The limiting cylinder 15 is provided with a limiting angle block 14 and a bushing 17. The pull rod 11 has a long groove for the limiting angle block 14 to be inserted. The limiting angle block 14 can prevent the pull rod 11 from rotating around the axis of the pull rod 11. As the pull rod 11 moves axially, the limiting angle block 14 can always limit the rotation of the pull rod 11. A limiting nut 16 is threadedly connected to the pull rod 11. The limiting nut 16 passes through the limiting cylinder 15. One end of the limiting nut 16 in the limiting cylinder 15 is provided with a limiting flange 16-1. The radial dimension of the limiting flange 16-1 is larger than the diameter of the through hole on the limiting cylinder 15 through which the limiting nut 16 passes. One end of the bushing 17 abuts against the limiting angle block 14, and the other end of the bushing 17 abuts against the limiting flange 16-1. When the limiting nut 16 is rotated, the pull rod 11 cannot rotate because it is restricted by the limiting angle block 14. Therefore, as the limiting nut 16 rotates, the pull rod 11 only moves axially. The bushing 17 then axially limits the limiting nut 16. At the same time, it can also prevent repeated rotation of the limiting nut 16 and the limiting flange 16-1 from experiencing greater wear, thus playing a certain anti-wear role.

[0046] As an optional embodiment of the above, referring to Figures 4(a) and 4(b), in this embodiment, the self-locking nut tightening wrench includes a wrench sleeve 2 and an adapter sleeve 3. Both the wrench sleeve 2 and the adapter sleeve 3 are sleeved on the outside of the mandrel 1. One end of the wrench sleeve 2 can be sleeved on the self-locking nut 22 and drive the self-locking nut 22 to rotate. The other end of the wrench sleeve 2 is connected to one end of the adapter sleeve 3. The surface of the adapter sleeve 3 is bent inward to form multiple positioning recesses 3-1. The positioning recesses 3-1 are in contact with the outer surface of the mandrel 1, or there is a gap between the inner enveloping cylindrical surface formed by all the positioning recesses 3-1 and the outer wall of the mandrel 1. The multiple positioning recesses 3-1 achieve radial positioning of the adapter sleeve 3, preventing shaking when rotating the adapter sleeve 3, which helps to extend the service life of the adapter sleeve 3. Meanwhile, the wrench sleeve 2 can be fitted onto the self-locking nut 22 to directly drive the self-locking nut 22 to rotate. Through the adapter sleeve 3, torque can be applied to the adapter sleeve 3 outside the shaft 23 and transmitted to the self-locking nut 22, thereby achieving the purpose of rotating the self-locking nut 22 by driving the adapter sleeve 3.

[0047] As an optional solution of the above embodiment, referring to Figure 4(b), in this embodiment, at least two positioning threaded holes are evenly opened in the circumference of the positioning concave ring 3-1 on the adapter sleeve 3. An annular limiting block 12 is sleeved on the outside of the adapter sleeve 3. A through hole is opened in the circumference of the limiting block 12 at the position opposite to the positioning threaded hole. A hand-tightening bolt 12-1 is provided in each through hole. The hand-tightening bolt 12-1 is threadedly connected to the positioning threaded hole. The surface of the mandrel 1 is provided with an annular sliding groove 1-1 for the end of the hand-tightening bolt 12-1 to be inserted. When the end of the hand-tightening bolt 12-1 is inserted into the annular sliding groove 1-1, it can restrict the axial movement of the adapter sleeve 3. At the same time, the end of the wrench sleeve 2 is sleeved on the self-locking nut 22. In this embodiment, the limiting block 12 provides support for multiple hand-tightening bolts 12-1. When the drive adapter sleeve 3 rotates, the hand-tightening bolts 12-1 and the limiting block 12 rotate together, and the end of the hand-tightening bolt 12-1 slides in the annular groove 1-1. However, the entire adapter sleeve 3 does not move axially. Therefore, in the above structure, the hand-tightening bolts 12-1 can be used to axially limit the adapter sleeve 3, ensuring the stability of the position of the adapter sleeve 3 when rotating the self-locking nut 22, which helps to ensure safe operation. At the same time, two or more annular grooves 1-1 can be set as a group. If the length of the wrench sleeve 2 is insufficient when using one annular groove 1-1, in order to prevent the wrench sleeve 2 from disengaging from the self-locking nut 22, the hand-tightening bolt 12-1 is loosened and moved to another annular groove 1-1. At this time, the wrench sleeve 2 moves towards the self-locking nut 22. The wrench sleeve 2 is fitted a longer distance before the adapter sleeve 3 is rotated until the inner cone 21 is installed in place. The number of each annular groove 1-1 is selected according to the length of the wrench sleeve 2 and the self-locking nut 22, and the present invention does not impose a specific limitation.

[0048] Example 1

[0049] The assembly device for the shaft support assembly in this embodiment includes a mandrel 1, a wrench sleeve 2, an adapter sleeve 3, a tapered end fixing screw 4, a positioning shaft 5, a hook-shaped pressure plate 6, a hinge shaft 7, a pull rod head 8, a first limiting pin 9, a pin 10, a pull rod 11, a limiting block 12, a support block 13, a limiting angle block 14, a limiting sleeve 15, a limiting nut 16, a bushing 17, an inner corner head screw 18, and a screw 19.

[0050] In this embodiment, the opening and closing mechanism is composed of positioning shaft 5, hook-shaped pressure plate 6, hinge shaft 7, pull rod head 8, and first positioning pin 9. The opening and closing mechanism is adjusted by pin 10, pull rod 11, support block 13, angle limiting block 14, limiting cylinder 15, limiting nut 16, bushing 17, inner angle head screw 18, and screw 19 to axially stop the inner cone 21.

[0051] In this embodiment, a self-locking nut tightening wrench is composed of a wrench sleeve 2, an adapter sleeve 3, a conical end fixing screw 4, and a limiting block 12 to limit the force on the self-locking nut. The right end of the wrench sleeve 2 is inserted into the left end of the adapter sleeve 3, and the connection is fixed at the connection point by the conical end fixing screw 4.

[0052] The advantage of this embodiment is that the shaft support assembly device is reliably positioned and can simultaneously perform inner cone stop and force limiting at one end, making it widely applicable to the assembly of aero-engine shaft support assemblies.

[0053] The working process of the shaft support assembly device in this embodiment includes the following steps:

[0054] Step 1. Adjust the limiting nut 16 to move the pull rod 11 and pull rod head 8 to the right, causing the drive disc 8-1 to rotate the hook-shaped pressure plate 6 counterclockwise. At this time, the flange 6-2 rotates into one side of the inner cavity of the hollow section 5-2. The hook-shaped pressure plate 6 is still in the open state. When the hook-shaped pressure plate 6 is in the open state, install the bracket assembly from left to right onto the outside of the hollow section 5-2. Then adjust the limiting nut 16 to move the pull rod 11 and pull rod head 8 to the left, causing the drive disc 8-1 to rotate the hook-shaped pressure plate 6 clockwise. At this time, the flange 6-2 rotates out from the inner cavity of the hollow section 5-2 and abuts against the large end face of the inner cone 21, axially limiting the inner cone 21. At the same time, the toothed plate at the left end of the mandrel inserts into the inner cone positioning groove 21-1 at the right end of the inner cone 21, realizing the circumferential limitation of the inner cone 21. At this time, the hook-shaped pressure plate 6 is in the closed state, ensuring that the bracket assembly is clamped and stopped.

[0055] Step 2. Place the assembly device with bracket assembly into the shaft 23 of the low-pressure turbine shaft, and fix it to the assembly vehicle through the support block 13 to stop the action; then tighten the self-locking nut 22 by using the self-locking nut tightening wrench composed of the wrench sleeve 2, the adapter sleeve 3 and the limit block 12. During operation, simply rotate the adapter sleeve 3.

[0056] Step 3. After tightening the self-locking nut 22, adjust the limit nut 16 to move the pull rod 11 and the pull rod head 8 to the right, thereby opening the hook-shaped pressure plate 6 and moving the shaft support assembly assembly device of this embodiment horizontally to the right, thus completing the assembly of the shaft support assembly.

[0057] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Those skilled in the art, upon considering the specification and practicing the invention disclosed herein, will readily conceive of other embodiments of the invention. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be considered as part of the content disclosed in this invention and are all within the protection scope of this invention.

Claims

1. An assembly device for a shaft support assembly, characterized in that, Includes an opening and closing mechanism, which can penetrate the inner hole of the inner cone (21) and can axially limit the inner cone (21). The opening and closing mechanism is coaxially connected to an opening and closing mechanism adjustment mechanism, which is used to control the action of the opening and closing mechanism and to circumferentially limit the inner cone (21). A self-locking nut tightening wrench is sleeved on the outside of the opening and closing mechanism adjustment mechanism, which can drive the self-locking nut to rotate. Both the self-locking nut tightening wrench and the opening and closing mechanism adjustment mechanism can extend to the outside of the shaft (23). The opening and closing mechanism includes a positioning shaft (5), one end of which is connected to the opening and closing mechanism adjustment mechanism, and the other end of which is rotatably connected to a hook-shaped pressure plate (6). The hook-shaped pressure plate (6) has a groove (6-1) on the side facing the central axis of the positioning shaft (5), and a flange (6-2) on the side of the hook-shaped pressure plate (6) away from the central axis of the positioning shaft (5). The pull rod head (8) passes through the central axis of the positioning shaft (5), one end of which is connected to the opening and closing mechanism adjustment mechanism, and the other end of which is provided with a drive disc (8-1). The outer edge of the drive disc (8-1) extends into the groove (6-1). The drive disc (8-1) can drive the hook-shaped pressure plate (6) to rotate around the rotating shaft so that the flange (6-2) abuts against the large end face of the inner cone (21) to axially limit the inner cone (21), or to release the flange (6-2) from axially limiting the inner cone (21). The opening and closing mechanism adjustment mechanism includes a spindle (1), a pull rod (11), and a pull rod drive mechanism. The spindle (1) is a hollow structure. One end of the spindle (1) is fixedly connected to the end of the positioning shaft (5). The end of the spindle (1) connected to the positioning shaft (5) is limited to the small end of the inner cone (21) to limit the inner cone (21) circumferentially. The pull rod (11) is coaxially arranged in the inner cavity of the spindle (1). One end of the pull rod (11) is connected to the pull rod head (8). The other end of the spindle (1) and the other end of the pull rod (11) are both connected to the pull rod drive mechanism. The pull rod drive mechanism can drive the pull rod (11) to reciprocate along the axial direction.

2. The shaft support assembly device according to claim 1, characterized in that, The positioning shaft (5) includes a solid section (5-1) and a hollow section (5-2). One end of the solid section (5-1) and one end of the hollow section (5-2) are coaxially connected. The other end of the solid section (5-1) is connected to the opening and closing mechanism adjustment mechanism. The inner cone (21) can be fitted onto the outside of the hollow section (5-2). The side wall of the hollow section (5-2) is provided with a mounting hole for mounting a hook-shaped pressure plate (6). The hook-shaped pressure plate (6) is axially connected to the hollow section (5-2) at the mounting hole. When the drive disc (8-1) drives the hook-shaped pressure plate (6) to rotate around the shaft, the flange (6-2) can extend from the mounting hole and abut against the large end face of the inner cone (21), thereby axially limiting the inner cone (21). Alternatively, the flange (6-2) can rotate into the mounting hole to release the axial limitation of the inner cone (21).

3. The shaft support assembly device according to claim 2, characterized in that, The pull rod head (8) passes through the center hole of the solid section (5-1). The side wall of the pull rod head (8) is provided with a first limiting pin (9) on the part located on both sides of the solid section (5-1). By limiting the first limiting pin (9), the drive disk (8-1) can be kept embedded in the groove (6-1).

4. The shaft support assembly device according to claim 1, characterized in that, The inner cone (21) has an inner cone positioning groove (21-1) with its small end facing inward, and the end of the spindle (1) has a positioning tooth that can be embedded in the inner cone positioning groove (21-1).

5. The assembly device for a shaft support assembly according to claim 1, characterized in that, The pull rod drive mechanism includes a support block (13), one end of which is fixedly connected to the spindle (1). A limiting cylinder (15) is connected to the other side of the support block (13) and the spindle (1). The pull rod (11) passes through the axis of the support block (13) and the limiting cylinder (15). The limiting cylinder (15) is provided with a limiting angle block (14) and a bushing (17). The pull rod (11) has a long groove for the limiting angle block (14) to be inserted. The limiting angle block (14) can prevent the pull rod (11) from rotating around the pull rod (1). 1) The axis rotates, and the pull rod (11) is threaded with a limit nut (16). The limit nut (16) passes through the limit cylinder (15). The end of the limit nut (16) in the limit cylinder (15) is provided with a limit flange (16-1). The radial dimension of the limit flange (16-1) is greater than the diameter of the through hole on the limit cylinder (15) through which the limit nut (16) passes. One end of the bushing (17) abuts against the limit angle block (14), and the other end of the bushing (17) abuts against the limit flange (16-1).

6. The assembly device for a shaft support assembly according to claim 1, characterized in that, The self-locking nut tightening wrench includes a wrench sleeve (2) and an adapter sleeve (3). Both the wrench sleeve (2) and the adapter sleeve (3) are sleeved on the outside of the mandrel (1). One end of the wrench sleeve (2) can be sleeved on the self-locking nut (22) and drive the self-locking nut (22) to rotate. The other end of the wrench sleeve (2) is connected to one end of the adapter sleeve (3). The surface of the adapter sleeve (3) is bent inward to form multiple positioning concave rings (3-1). The positioning concave rings (3-1) are in contact with the outer surface of the mandrel (1), or there is a gap between the inner envelope cylindrical surface enclosed by all the positioning concave rings (3-1) and the outer wall of the mandrel (1).

7. The shaft support assembly device according to claim 6, characterized in that, The adapter sleeve (3) has at least two positioning threaded holes evenly opened in the circumference of the positioning concave ring (3-1). The adapter sleeve (3) is fitted with an annular limiting block (12). The limiting block (12) has through holes in the circumference opposite to the positioning threaded holes. Each through hole is provided with a hand-tightening bolt (12-1). The hand-tightening bolt (12-1) is threadedly connected to the positioning threaded hole. The surface of the spindle (1) is provided with an annular groove (1-1) for the end of the hand-tightening bolt (12-1) to be inserted. When the end of the hand-tightening bolt (12-1) is inserted into the annular groove (1-1), it can restrict the axial movement of the adapter sleeve (3). At the same time, the end of the wrench sleeve (2) is fitted on the self-locking nut (22).

8. A method for assembling a shaft support assembly, characterized in that, The process includes the following: The inner cone is fitted onto the opening and closing mechanism of the shaft support assembly device according to any one of claims 1-7 and extends into the shaft (23). The self-locking nut tightening wrench and the opening and closing mechanism adjustment mechanism both extend to the outside of the shaft (23). The opening and closing mechanism is controlled by the opening and closing mechanism adjustment mechanism, so that the opening and closing mechanism limits the axial direction of the inner cone (21), and the opening and closing mechanism limits the circumferential direction of the inner cone (21) through the opening and closing mechanism adjustment mechanism. Rotate the part of the self-locking nut tightening wrench located outside the shaft (23) to drive the self-locking nut (22) to rotate. After the self-locking nut (22) rotates, it drives the bracket (20) to move on the inner cone (21) until the bracket (20) is assembled in place. Then, the opening and closing mechanism adjustment mechanism controls the opening and closing mechanism to release the axial limit of the inner cone (21); then the entire shaft support assembly is pulled out, and at the same time the opening and closing mechanism adjustment mechanism releases the circumferential limit of the inner cone (21).

Images