Nut dismounting device and method for long-axis part

Abstract

The application discloses a nut dismounting device for long shaft parts, and belongs to the technical field of aero-engine part assembly, which comprises a mounting frame, a torque multiplier, a first support, a first wrench, an anti-rotation support plate, a connecting support plate, a supporting ring, a second wrench and a second support; the first support is used for being connected to the mounting frame; the anti-rotation support plate is connected with a second nut; the torque multiplier is used for driving the output shaft to rotate through the first wrench, and then assembling or disassembling the second nut; the second support is used for replacing the first support; the supporting ring is used for replacing the anti-rotation support plate; the supporting ring is used for being connected to the mounting frame through a first end and fixing the torque multiplier through a second end; the second wrench is used for replacing the first wrench and being connected to a spline shaft sleeve on the output shaft; and the torque multiplier is further used for driving the output shaft to rotate through the second wrench, and then assembling or disassembling the first nut. The application can realize the quick assembly and disassembly of the second nut and the first nut on the output shaft, and can improve the assembly quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of assembling aero-engine parts, in particular, relates to a nut dismounting device for a long shaft part, and further relates to a nut dismounting method comprising the nut dismounting device for the long shaft part. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the context of the application. The work of the presently named inventors, to the extent the descriptions are described in this section, and the descriptions may not be construed as constituting prior art to the application, either expressly or im plicitly.

[0003] The aero-engine output shaft assembly is a key part connecting various components inside the engine, and bears the important functions of transmitting power, damping, and reducing axial load.

[0004] The length of the output shaft of a certain type of turboshaft engine is 1.1 m, and the bearing, spline shaft sleeve and other components need to be interference assembled on the output shaft, and are pressed by the first nut 100 and the second nut 200 (see Figure 1 ). Because the axial length of the output shaft part is long, the second nut 200 and the spline shaft sleeve that can be used for anti-rotation are at the same end, and the anti-rotation part is the internal spline, which makes it difficult to fix during tightening, and the assembly is difficult, and there is a problem that the labor intensity of manual assembly is large, and the assembly quality is difficult to improve.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] The inventors found through research that it is difficult to directly assemble the first nut and the second nut on the output shaft, and the worker's operation is not convenient, and a lot of force is needed for tightening operation, and the operation space is not wide enough. However, if the first nut and the second nut are fixed separately, the output shaft is rotated in the opposite direction, which has a larger operation space and is easier to rotate the output shaft, greatly reduces the labor intensity, and is also beneficial to improve the assembly quality.

[0007] In view of at least one of the above technical problems, the application provides a nut dismounting device for a long shaft part, which can support and limit the output shaft in the vertical direction through the mounting frame and the first support, and fix the second nut, then drive the output shaft to rotate through the torque multiplier to tighten the second nut on the output shaft or loosen the second nut from the output shaft after fixing the first nut on the output shaft through the mounting frame and the second support, then drive the output shaft to rotate through the torque multiplier to tighten the first nut on the output shaft or loosen the first nut from the output shaft, so that the second nut and the first nut can be quickly assembled and disassembled.

[0008] Meanwhile, the application provides a nut dismounting method for a long shaft part.

[0009] According to one aspect of the application, a nut dismounting device for a long shaft part is provided for assembling or dismounting a first nut and a second nut on or from an output shaft, the output shaft being provided with a bearing and a spline shaft sleeve, the nut dismounting device for the long shaft part comprising a mounting frame, a torque multiplier, a first dismounting assembly and a second dismounting assembly, the mounting frame being used to support the output shaft in the vertical direction, the first dismounting assembly and the second dismounting assembly being used to be alternatively installed on the mounting frame;

[0010] The first dismounting assembly comprises a first support, a first wrench and an anti-rotation support plate, the first support being used to be connected to the mounting frame to support the outer ring of the bearing on the output shaft, the first end of the anti-rotation support plate being fixedly connected to the mounting frame, the second end of the anti-rotation support plate being used to be fixedly connected to the second nut, the second end of the anti-rotation support plate being further used to support the torque multiplier, the first end of the first wrench being used to be connected to the spline shaft sleeve on the output shaft, the second end of the first wrench being used to be clamped to the torque multiplier, the torque multiplier being used to drive the output shaft to rotate through the first wrench and assemble or disassemble the second nut;

[0011] The second dismounting assembly comprises a support ring, a second wrench and a second support, the second support being used to be connected to the mounting frame and fixedly connected to the first nut at the first end of the second support, the support ring being used to be connected to the mounting frame, the support ring being used to support the torque multiplier at the second end through the connection at the first end with the mounting frame, the second wrench being used to be connected to the spline shaft sleeve on the output shaft, the second end of the second wrench being used to be clamped to the torque multiplier, the torque multiplier being further used to drive the output shaft to rotate through the second wrench and assemble or disassemble the first nut.

[0012] In some embodiments of the present application, the mounting frame comprises a first support plate, a second support plate and a connecting column, the first support plate and the second support plate are arranged in parallel along the vertical direction, the connecting column is used for connecting and fixing the first support plate and the second support plate, a first limiting groove is formed on the first support plate, the first limiting groove is used for mounting an anti-rotation support plate or a support ring, a second limiting groove opposite to the first limiting groove is formed on the second support plate, and the second limiting groove is used for limiting and fixing the output shaft in the vertical direction.

[0013] In some embodiments of the present application, the first end of the first support is provided with a first mounting platform, the first mounting platform is connected to the second support plate by bolts, and the end face of the second end of the first support is provided with a clamping groove, which is used for clamping the lug on the outer ring of the bearing when the first support supports the outer ring.

[0014] In some embodiments of the present application, the anti-rotation support plate comprises a support plate body, a second mounting platform and a first protruding tooth, the support plate body is a hollow cylindrical structure, the top end of the support plate body is provided with the second mounting platform, the second mounting platform is used for being connected to the first support plate by bolts, and the bottom end of the support plate body is annularly arranged with a plurality of first protruding teeth, the first protruding teeth are used for being clamped with the second limiting groove pre-set on the second nut.

[0015] In some embodiments of the present application, the second support is a hollow cylindrical structure, the bottom end of the second support is provided with a fifth mounting platform, the fifth mounting platform is used for being connected to the second support plate by bolts, and the top end of the second support is annularly arranged with a plurality of second protruding teeth, the second protruding teeth are used for being clamped with the first limiting groove pre-set on the first nut.

[0016] In some embodiments of the present application, the bottom end of the support ring is provided with a fourth mounting platform, the fourth mounting platform is used for being connected to the first support plate by bolts, the torque multiplier penetrates through the support ring, and the top end of the support ring is provided with a second hexagonal hole, the second hexagonal hole is used for being clamped with the hexagonal head pre-set on the torque multiplier, so as to fix and support the torque multiplier.

[0017] In some embodiments of the present application, the nut dismounting device of the long shaft part further comprises a connecting support plate, the first end of the connecting support plate is connected with the anti-rotation support plate, the second end of the connecting support plate is used for fixing and supporting the torque multiplier, the connecting support plate is a hollow cylindrical structure, the bottom end of the connecting support plate is provided with a third mounting platform, the third mounting platform is used for being connected with the anti-rotation support plate by locking members, the torque multiplier penetrates through the connecting support plate and the anti-rotation support plate in sequence, and the top end of the connecting support plate is provided with a first hexagonal hole, the first hexagonal hole is used for being clamped with the hexagonal head pre-set on the torque multiplier, so as to fix and support the torque multiplier.

[0018] In some embodiments of the present application, the bottom outer wall of the first wrench is provided with a first outer spline for matching with the inner spline of the spline shaft sleeve on the output shaft, and the top end of the first wrench is provided with a first square hole for clamping with the preset square head of the torque multiplier; the bottom outer wall of the second wrench is provided with a second outer spline for matching with the inner spline of the spline shaft sleeve on the output shaft, and the top end of the second wrench is provided with a second square hole for clamping with the preset square head of the torque multiplier.

[0019] In some embodiments of the present application, the nut dismounting device of the long shaft part further comprises an adapter for replacing the clamping of the torque multiplier with the first wrench or the second wrench, the bottom end of the adapter is provided with an adapter square head for clamping with the first square hole of the first wrench or the second square hole of the second wrench, and the top end of the adapter is provided with a third square hole for clamping with the torque wrench.

[0020] In addition, the present application also discloses a nut dismounting method of a long shaft part, which adopts the above-mentioned nut dismounting device of a long shaft part, and comprises the following steps:

[0021] When the second nut needs to be assembled, first, the second nut is screwed into the pre-set mounting position on the output shaft, the first support is connected to the mounting frame, the small end of the output shaft is placed on the first support with the output shaft supported by the outer ring of the bearing on the first support, the state of the output shaft is checked to ensure that the output shaft can rotate freely; the first wrench is sleeved into the spline shaft sleeve on the output shaft; the first end of the anti-rotation support plate is connected to the mounting frame, and the second end of the anti-rotation support plate is connected to the second nut; the first end of the connecting plate is connected to the anti-rotation support plate, and the second end of the connecting plate is used to fix and support the torque multiplier, the torque multiplier is clamped with the second end of the first wrench; the torque of the torque multiplier is set to 1 / 16 of the actual required tightening torque, the torque multiplier is twisted to drive the first wrench and the output shaft to rotate, and then the second nut is assembled and fastened on the output shaft;

[0022] When the second nut needs to be disassembled from the output shaft, the second nut can be unscrewed and removed by reversing the torque multiplier;

[0023] When the first nut needs to be assembled, the first nut is screwed into the pre-set mounting position of the output shaft, the second support is installed on the mounting frame instead of the first support, the output shaft is placed on the second support with the small end downward and is fixed with the first nut through the first end of the second support; the support ring is connected to the mounting frame instead of the anti-rotation plate, and the torque multiplier is fixed and supported by the support ring; the second wrench is put into the spline shaft sleeve of the output shaft instead of the first wrench; the torque multiplier is clamped with the second end of the second wrench; the torque of the torque multiplier is set as 1 / 16 of the actual required tightening torque, the torque multiplier is rotated to drive the second wrench and the output shaft, and then the first nut is assembled and fastened on the output shaft;

[0024] When the first nut needs to be disassembled from the output shaft, the first nut can be unscrewed and removed by reversing the torque multiplier.

[0025] The application has the following beneficial effects:

[0026] The nut dismounting device of the long shaft part supports and limits the output shaft in the vertical direction through the mounting frame and the first support, and the output shaft can rotate freely without interference. The second nut is fixed and connected through the anti-rotation plate installed on the mounting frame, and the torque multiplier is supported by the anti-rotation plate. Then the torque multiplier is used to rotate the output shaft through the first wrench to tighten or loosen the second nut on the output shaft. When the first nut needs to be assembled or disassembled, the first support is replaced by the second support installed on the mounting frame, the first nut is fixed by the second support, the support ring is connected to the mounting frame instead of the anti-rotation plate, and the torque multiplier is supported by the support ring. Then the torque multiplier is used to rotate the output shaft through the second wrench to tighten or loosen the first nut on the output shaft. In this way, the second nut and the first nut can be assembled or disassembled by reversing the rotation of the output shaft. The worker only needs to operate the torque multiplier, the operation space is large, the labor intensity and labor amount are greatly reduced, and the assembly quality can be effectively improved.

[0027] The nut dismounting method of the long shaft part can sequentially assemble or disassemble the second nut and the first nut on the output shaft of the long shaft part. The mounting frame limits and supports the output shaft in the vertical direction. The first support and the second support are alternately installed on the mounting frame, the support ring replaces the anti-rotation plate and the connecting plate, and the second wrench replaces the first wrench. The second nut and the first nut can be assembled or disassembled by rotating the output shaft. The worker's operation difficulty and labor intensity are greatly reduced, which is conducive to improving the assembly efficiency. The mounting frame can be universal, and only the support and the tightening part need to be replaced to assemble and disassemble the nuts of other models of long shaft parts.

[0028] Of course, implementing any of the products of the present application does not necessarily require achieving all of the advantages described above at the same time. In addition to the objects, features, and advantages described above, the present application has other objects, features and advantages. The present application will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the application and are incorporated herein in

[0030] Figure 1 is a schematic view of the output shaft of the present application with bearings, spline shaft sleeve, first nut 100 and second nut 200 assembled thereon;

[0031] Figure 2 is a schematic view of the installation of the first support and first wrench of the preferred embodiment of the present application;

[0032] Figure 3 is a schematic view of the support of the output shaft by the first support of the preferred embodiment of the present application;

[0033] Figure 4 is a schematic view of the installation of the anti-rotation support plate of the preferred embodiment of the present application;

[0034] Figure 5 is a schematic view of the installation of the second support and second wrench of the preferred embodiment of the present application;

[0035] Figure 6 is a schematic view of the support of the output shaft by the second support of the preferred embodiment of the present application;

[0036] Figure 7 is a schematic view of the installation of the support ring of the preferred embodiment of the present application;

[0037] Figure 8 is a schematic view of the structure of the mounting bracket of the preferred embodiment of the present application;

[0038] Figure 9 is a schematic view of the structure of the first support of the preferred embodiment of the present application;

[0039] Figure 10 is a schematic view of the structure of the first wrench of the preferred embodiment of the present application;

[0040] Figure 11 is a schematic view of the internal structure of the first wrench of the preferred embodiment of the present application;

[0041] Figure 12 is a schematic view of the structure of the anti-rotation support plate of the preferred embodiment of the present application;

[0042] Figure 13 is a schematic view of the internal structure of the anti-rotation support plate of the preferred embodiment of the present application;

[0043] Figure 14 is a schematic view of the structure of the connecting support plate of the preferred embodiment of the present application;

[0044] Figure 15 is a schematic view of the structure of the support ring of the preferred embodiment of the present application;

[0045] Figure 16 is a schematic view of the structure of the second wrench of the preferred embodiment of the present application;

[0046] Figure 17 is a schematic view of the structure of the second support of the preferred embodiment of the present application;

[0047] Figure 18 is a schematic view of the anti-rotation support plate and the adapter of the preferred embodiment of the present application;

[0048] Figure 19 is a schematic view of the structure of the adapter of the preferred embodiment of the present application;

[0049] Legend: 100, first nut; 200, second nut; 300, mounting frame; 301, first support plate; 302, second support plate; 303, connecting column; 304, first limiting groove; 305, second limiting groove; 400, assembly vehicle; 500, torque multiplier; 600, adapter; 601, third square hole; 602, adapter square head; 1, first support; 11, first mounting platform; 12, clamping groove; 2, first wrench; 21, first external spline; 22, first square hole; 3, anti-rotation support plate; 31, support plate body; 32, second mounting platform; 33, first protruding tooth; 4, locking member; 5, connecting support plate; 51, third mounting platform; 52, first hexagonal hole; 6, support ring; 61, fourth mounting platform; 62, second hexagonal hole; 7, second wrench; 71, second square hole; 72, second external spline; 8, second support; 81, fifth mounting platform; 82, second protruding tooth. DETAILED DESCRIPTION

[0050] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following description.

[0051] Figure 1 is a schematic view of the output shaft of the assembly bearing, spline shaft sleeve, first nut 100 and second nut 200 of the present application; Figure 2 is a schematic view of the installation of the first support and the first wrench of the preferred embodiment of the present application;

[0052] Figure 3is a schematic view of the support of the output shaft by the first support of the preferred embodiment of the present application; Figure 4 is a schematic view of the installation of the anti-rotation support plate of the preferred embodiment of the present application; Figure 5 is a schematic view of the installation of the second support and the second wrench of the preferred embodiment of the present application; Figure 6 is a schematic view of the support of the output shaft by the second support of the preferred embodiment of the present application; Figure 7 is a schematic view of the installation of the support ring of the preferred embodiment of the present application; Figure 8 is a schematic view of the structure of the mounting frame of the preferred embodiment of the present application; Figure 9 is a schematic view of the structure of the first support of the preferred embodiment of the present application; Figure 10 is a schematic view of the structure of the first wrench of the preferred embodiment of the present application; Figure 11 is a schematic view of the internal structure of the first wrench of the preferred embodiment of the present application; Figure 12 is a schematic view of the structure of the anti-rotation support plate of the preferred embodiment of the present application; Figure 13 is a schematic view of the internal structure of the anti-rotation support plate of the preferred embodiment of the present application; Figure 14 is a schematic view of the structure of the connecting support plate of the preferred embodiment of the present application; Figure 15 is a schematic view of the structure of the support ring of the preferred embodiment of the present application; Figure 16 is a schematic view of the structure of the second wrench of the preferred embodiment of the present application; Figure 17 is a schematic view of the structure of the second support of the preferred embodiment of the present application; Figure 18 is a schematic view of the anti-rotation support plate and the adapter of the preferred embodiment of the present application; Figure 19 is a schematic view of the structure of the adapter of the preferred embodiment of the present application.

[0053] The nut dismounting device for long shaft parts is used for assembling or dismounting the first nut 100 and the second nut 200 on the output shaft, and the output shaft is provided with a bearing and a spline shaft sleeve. The nut dismounting device for long shaft parts comprises a mounting frame 300, a torque multiplier 500, a first dismounting assembly and a second dismounting assembly. The mounting frame 300 is used for vertically supporting the output shaft, and the first dismounting assembly and the second dismounting assembly are used for being replaceably mounted on the mounting frame 300.

[0054] The first disassembly and assembly component comprises a first support 1, a first wrench 2 and an anti-rotation support plate 3. The first support 1 is used to be connected to the mounting frame 300 to support the outer ring of the bearing on the output shaft. The first end of the anti-rotation support plate 3 is fixedly connected to the mounting frame 300. The second end of the anti-rotation support plate 3 is used to be fixedly connected to the second nut 200. The second end of the anti-rotation support plate 3 is also used to fixedly support the torque multiplier 500. The first end of the first wrench 2 is used to be connected to the spline shaft sleeve on the output shaft. The second end of the first wrench 2 is used to be clamped to the torque multiplier 500. The torque multiplier 500 is used to drive the output shaft to rotate through the first wrench 2, and then assemble or disassemble the second nut 200.

[0055] The second disassembly and assembly component comprises a support ring 6, a second wrench 7 and a second support 8. The second support 8 is used to be connected to the mounting frame 300 and is fixedly connected to the first nut 100 through the first end of the second support 8. The support ring 6 is used to be connected to the mounting frame 300 and is used to fixedly support the torque multiplier 500 through the second end. The second wrench 7 is used to be connected to the spline shaft sleeve on the output shaft. The second end of the second wrench 7 is used to be clamped to the torque multiplier 500. The torque multiplier 500 is also used to drive the output shaft to rotate through the second wrench 7, and then assemble or disassemble the first nut 100.

[0056] Here, the bearing on the output shaft is preferably an angular contact ball bearing, which can bear radial load. The bearing outer ring is supported by the first support 1, which can ensure that the output shaft can rotate freely in the radial direction.

[0057] In some embodiments, the mounting frame 300 is used to be erected on the assembly vehicle 400. The mounting frame 300 can be supported and fixed by the assembly vehicle 400, and the mounting frame 300 can be driven to move flexibly.

[0058] The nut dismounting device of the long shaft part of the application supports and limits the output shaft in the vertical direction through the mounting frame 300 and the first support 1, meanwhile, the output shaft can rotate freely without interference, and the second nut 200 is connected and fixed through the anti-rotation support plate 3 installed on the mounting frame 300, and the torque multiplier 500 is supported through the anti-rotation support plate 3, then the torque multiplier 500 is used to rotate the output shaft through the first wrench 2, so as to realize the rotation and fixation of the second nut 200 on the output shaft, or the loosening and disassembly of the second nut 200 from the output shaft; when the first nut 100 needs to be assembled or disassembled, only the first support 1 is replaced by the second support 8 installed on the mounting frame 300, the first nut 100 is fixed through the second support 8, and the support ring 6 is replaced in the position of the anti-rotation support plate 3 and connected to the mounting frame 300, the torque multiplier 500 is supported through the support ring 6, then the torque multiplier 500 is used to rotate the output shaft through the second wrench 7, so as to realize the rotation and fixation of the first nut 100 on the output shaft, or the loosening and disassembly of the first nut 100 from the output shaft. In this way, the assembly or disassembly of the second nut 200 and the first nut 100 can be realized by reversing the rotation of the output shaft, and the worker only needs to operate the torque multiplier 500, so the operation space is large, the labor intensity and labor amount are greatly reduced, and the assembly quality can be effectively improved.

[0059] Preferably, as shown in Figure 2 、 7 , the mounting frame 300 comprises a first support plate 301, a second support plate 302 and a connecting column 303, the first support plate 301 and the second support plate 302 are arranged in parallel along the vertical direction, and the connecting column 303 is used to connect and fix the first support plate 301 and the second support plate 302, the first support plate 301 is provided with a first limiting groove 304, the first limiting groove 304 is used to install the anti-rotation support plate 3 or the support ring 6, and the second support plate 302 is provided with a second limiting groove 305 opposite to the first limiting groove 304, the second limiting groove 305 is used to limit and fix the output shaft in the vertical direction.

[0060] It can be understood that the mounting frame 300 is a double-layer structure, the first support plate 301 and the second support plate 302 are arranged in parallel along the vertical direction, the first support plate 301 on the upper layer is connected and fixed with the second support plate 302 on the lower layer through the connecting column 303, so as to realize the limiting and supporting of the mounting frame 300 to the output shaft part with a longer length in the vertical direction, ensure that the output shaft is in a vertical state during assembly, realize a good stress condition of the part, and prevent the long shaft from deforming; and the mounting frame 300 provides the installation boundary of the first support 1, the anti-rotation support plate 3, the support ring 6 and the second support 8, so as to combine to form a larger operation space, which is convenient for workers to operate.

[0061] Preferably, as shown in Figure 2 、 3The first end of the first support 1 is provided with a first mounting platform 11, the first mounting platform 11 is connected to the second support plate 302 through a bolt, and the end face of the second end of the first support 1 is provided with a clamping groove 12, which is used for clamping the lug on the outer ring of the bearing when the first support 1 supports the outer ring of the bearing.

[0062] It can be understood that the first support 1 is fastened to the second support plate 302 through the first mounting platform 11 and a bolt, so that the first support 1 is stably installed. Since the first support 1 only needs to support and limit the output shaft in the vertical direction, and in order not to affect the rotation of the output shaft, the second end of the first support 1, i.e. the top end of the first support 1, supports the outer ring of the bearing on the output shaft, and the clamping groove 12 of the second end of the first support 1 can also avoid the lug on the outer ring, and plays a role of clamping the lug when supporting the outer ring of the bearing, thereby ensuring the stability of the support of the outer ring.

[0063] Preferably, as shown in Figure 2 , 3 , 4, 11, 12, the anti-rotation support plate 3 comprises a support plate body 31, a second mounting platform 32 and a first protruding tooth 33, the support plate body 31 is a hollow cylindrical structure, the top end of the support plate body 31 is provided with the second mounting platform 32, the second mounting platform 32 is used for being connected to the first support plate 301 through a bolt, and the bottom end of the support plate body 31 is provided with a plurality of first protruding teeth 33 in an annular array, and the first protruding teeth 33 are used for being clamped with the second limiting groove pre-set on the second nut 200.

[0064] It can be understood that the anti-rotation support plate 3 is fixedly installed on the first support plate 301 of the mounting frame 300, the first protruding teeth 33 at the bottom end of the anti-rotation support plate 3 are clamped with the second nut 200, the second nut 200 is limited, and the state that the output shaft rotates and the second nut 200 is relatively stationary is realized, that is, the second nut 200 is tightened on the output shaft.

[0065] It should be noted that since the second nut 200 and the spline shaft sleeve are at the same end of the output shaft, it is difficult to fix during tightening, the operation space is small, the assembly is difficult, and it is not convenient to directly tighten the second nut 200, therefore, the anti-rotation support plate 3 is used to limit the second nut 200, and the output shaft is tightened, so that the operation space is large, the operation is more convenient, and the assembly quality is improved.

[0066] Preferably, as shown in Figure 5 , 6As shown in Figures 7 and 17, the second support 8 is a hollow cylindrical structure. A fifth mounting platform 81 is provided at the bottom end of the second support 8. The fifth mounting platform 81 is used to be connected to the second support plate 302 by bolts. A plurality of second protruding teeth 82 are provided in an annular array at the top end of the second support 8. The second protruding teeth 82 are used to engage with the first limiting groove preset on the first nut 100.

[0067] It is understandable that when the first nut 100 needs to be assembled or disassembled, the first nut 100 needs to be fixed. Since the output shaft is supported on the mounting bracket 300 for vertical limiting, the first nut 100 is located below the second nut 200. At this time, the second support 8 replaces the first support 1 and is installed on the second support plate 302. The second protruding teeth 82 at the top of the second support 8 can be engaged with the first nut 100 to limit the first nut 100. At this time, the output shaft can be rotated to assemble or remove the first nut 100 from the output shaft. The overall structure of the tooling is relatively simple, the operating space is large, and the operating intensity is greatly reduced. At the same time, the assembly vehicle 400 and the mounting bracket 300 are interchangeable. Only the support and the tightening part need to be replaced to apply to the assembly and disassembly of nuts of other types of long shaft parts.

[0068] Preferably, please refer to Figure 14 As shown, a fourth mounting platform 61 is provided at the bottom end of the support ring 6, and the fourth mounting platform 61 is used to be connected to the first support plate 301 by bolts. The torque multiplier 500 is set through the support ring 6. A second hexagonal hole 62 is provided at the top end of the support ring 6. The second hexagonal hole 62 is used to engage with the preset hexagonal head on the torque multiplier 500 to fix and support the torque multiplier 500.

[0069] It can be understood that when there is no need to limit and fix the second nut 200, the anti-rotation support plate 3 is replaced by the support ring 6 to be installed on the first support plate 301 of the mounting frame 300. The support ring 6 does not interfere with the second nut 200, and the torque multiplier 500 is fixed and supported by the support ring 6, which makes it convenient for workers to operate the torque multiplier 500. The support ring 6 improves the accuracy of the vertical position of the torque multiplier 500, which is beneficial to improve the stability and accuracy of the operation and improve the quality of assembly.

[0070] Preferably, please refer to Figure 2 、 3As shown in FIGS. 13, the nut dismounting device of the long-axis part further comprises a connecting branch plate 5, a first end of the connecting branch plate 5 is connected with the anti-rotation branch plate 3, and a second end of the connecting branch plate 5 is used for fixing and supporting the torque multiplier 500. The connecting branch plate 5 is in a hollow cylindrical structure, a bottom end of the connecting branch plate 5 is provided with a third mounting platform 51, the third mounting platform 51 is used for being connected with the anti-rotation branch plate 3 through the locking piece 4, the torque multiplier 500 is sequentially arranged through the connecting branch plate 5 and the anti-rotation branch plate 3, and a top end of the connecting branch plate 5 is provided with a first hexagonal hole 52, which is used for being clamped with a hexagonal head of the torque multiplier 500 to fix and support the torque multiplier 500.

[0071] It can be understood that, in order to strengthen the stable support of the torque multiplier 500, the connecting branch plate 5 is fixedly arranged at the top end of the anti-rotation branch plate 3, the first hexagonal hole 52 at the top end of the connecting branch plate 5 is clamped with the hexagonal head of the torque multiplier 500 to achieve the reinforced and limited support of the torque multiplier 500. Meanwhile, the connecting branch plate 5 can be installed and fixed through the third mounting platform 51, has good adaptability, and can realize the flexible combination, quick dismounting and replacement of the connecting branch plate 5, so as to limit and cooperate with the force amplifiers of different specifications by replacing the connecting branch plates 5 of different sizes, and improve the adaptability of the device as a whole.

[0072] Preferably, as shown in FIGS. 15, Figure 9 10 As shown in FIGS. 15, a bottom outer wall of the first wrench 2 is provided with a first outer spline 21, which is used for cooperating with an inner spline of a spline shaft sleeve on an output shaft. A top end of the first wrench 2 is provided with a first square hole 22, which is used for being clamped with a square head of the torque multiplier 500. A bottom outer wall of the second wrench 7 is provided with a second outer spline 72, which is used for cooperating with the inner spline of the spline shaft sleeve on the output shaft. A top end of the second wrench 7 is provided with a second square hole 71, which is used for being clamped with the square head of the torque multiplier 500.

[0073] ​It can be understood that the first wrench 2 and the second wrench 7 are similar in structure, but the specific size is different, because the support ring 6 and the anti-rotation support plate 3 need to play different roles, so the overall structure of the support ring 6 and the anti-rotation support plate 3 is different, and because the torque multiplier 500 can be directly supported by the support ring 6, the use of the connecting support plate 5 can be cancelled, which leads to the fact that the height and other sizes of the second wrench 7 are different from those of the first wrench 2. In order to better cooperate with the torque multiplier 500, when the second nut 200 and the first nut 100 are assembled or disassembled, respectively, the first wrench 2 and the second wrench 7 are connected with the output shaft; in addition, the first wrench 2 and the second wrench 7 can also be prevented from being mistaken, by setting different marks on the first wrench 2 and the second wrench 7, the correct torque can be applied to the second nut 200 and the first nut 100, respectively, to ensure the accuracy of assembly.

[0074] Preferably, referring to Figure 18 、 19 As shown in the figure, the nut dismounting device of the long shaft part further comprises an adapter 600, which is used to replace the clamping of the torque multiplier 500 and the first wrench 2 or the second wrench 7. The bottom end of the adapter 600 is provided with an adapter square head 602, which is used to clamp with the first square hole 22 of the first wrench 2 or the second square hole 71 of the second wrench 7. The top end of the adapter 600 is provided with a third square hole 601, which is used to clamp with the torque wrench.

[0075] It can be understood that the torque wrench can be used instead of the torque multiplier 500, at this time the adapter 600 can be used to replace the torque wrench and the first wrench 2 or the second wrench 7, so as to solve the assembly problem when there is no torque multiplier 500, and improve the practicability and adaptability of the device.

[0076] In addition, the application also discloses a nut dismounting method of a long shaft part, which adopts the nut dismounting device of the long shaft part.

[0077] S100, when the second nut 200 needs to be assembled, first, the second nut 200 is screwed into the pre-tightening sleeve at the predetermined mounting position of the output shaft, the first support 1 is connected to the mounting frame 300, the output shaft small end is placed downward on the first support 1 and supports the outer ring of the bearing on the output shaft through the first support 1, and the state of the output shaft is checked to ensure that the output shaft can rotate freely;

[0078] When the second nut 200 needs to be assembled, first, the second nut 200 is pre-tightened and sleeved on the output shaft at a preset mounting position, the first support 1 is connected to the mounting frame 300, the small end of the output shaft is placed downward on the first support 1 and supports the outer ring of the bearing on the output shaft through the first support 1, the state of the output shaft is checked to ensure that the output shaft can rotate freely; the first wrench 2 is sleeved into the spline shaft sleeve on the output shaft; the first end of the anti-rotation support plate 3 is connected to the mounting frame 300, and the second end of the anti-rotation support plate 3 is connected to the second nut 200; the first end of the connecting support plate 5 is connected to the anti-rotation support plate 3, and the second end of the connecting support plate 5 is fixedly supported to the torque multiplier 500, the torque multiplier 500 is clamped to the second end of the first wrench 2; the torque of the torque multiplier 500 is set to 1 / 16 of the actual required tightening torque, the torque multiplier 500 is twisted to drive the first wrench 2 and the output shaft to rotate, and then the second nut 200 is assembled and fastened on the output shaft;

[0079] When the second nut 200 needs to be disassembled from the output shaft, the second nut 200 can be unscrewed and removed by reversing the torque multiplier 500;

[0080] When the first nut 100 needs to be assembled, the first nut 100 is pre-tightened and sleeved on the output shaft at a preset mounting position, the second support 8 replaces the first support 1 and is mounted on the mounting frame 300, the small end of the output shaft is placed downward on the second support 8 and is connected and fixed to the first nut 100 through the first end of the second support 8; the support ring 6 replaces the anti-rotation support plate 3 and is connected to the mounting frame 300, and the torque multiplier 500 is fixedly supported by the support ring 6; the second wrench 7 replaces the first wrench 2 and is sleeved into the spline shaft sleeve on the output shaft; the torque multiplier 500 is clamped to the second end of the second wrench 7; the torque of the torque multiplier 500 is set to 1 / 16 of the actual required tightening torque, the torque multiplier 500 is twisted to drive the second wrench 7 and the output shaft to rotate, and then the first nut 100 is assembled and fastened on the output shaft;

[0081] When the first nut 100 needs to be disassembled from the output shaft, the first nut 100 can be unscrewed and removed by reversing the torque multiplier 500.

[0082] The nut dismounting method of the long shaft part can realize assembly or disassembly of the second nut 200 and the first nut 100 on the output shaft of the long shaft part in sequence, the mounting frame 300 supports the output shaft in the vertical direction, the first support 1 and the second support 8 are alternately mounted on the mounting frame 300, the anti-rotation support plate 3 and the connecting support plate 5 are replaced by the support ring 6, the first wrench 2 is replaced by the second wrench 7, the assembly or disassembly of the second nut 200 and the first nut 100 can be realized in sequence, the output shaft is rotated by screwing, the difficulty and labor intensity of worker operation are greatly reduced, and the assembly efficiency is improved.

[0083] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not only include those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0084] The principles and implementation modes of the present application are described by applying specific examples in this document, and the above examples are only used to help understand the method of the present application and its core idea. The above description is only the preferred implementation mode of the present application, and it should be pointed out that due to the limited expression of the text, there are infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, and the above technical features can be combined in an appropriate way; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical scheme to other occasions without improvement, should be regarded as the protection of the present application.

Claims

1. A nut dismounting device for long shaft parts, for mounting and dismounting a first nut (100) and a second nut (200) to and from an output shaft, provided with a bearing and a spline bushing, characterized in that, The nut dismounting device of long axis part comprises a mounting frame (300), a torque multiplier (500), a first dismounting assembly and a second dismounting assembly, the mounting frame (300) is used for supporting the output shaft in the vertical direction, and the first dismounting assembly and the second dismounting assembly are used for being alternatively mounted on the mounting frame (300); The first dismounting assembly comprises a first support (1), a first wrench (2) and an anti-rotation support plate (3), the first support (1) is used for being connected on the mounting frame (300) to support the outer ring of the bearing on the output shaft, the first end of the anti-rotation support plate (3) is fixedly connected with the mounting frame (300), the second end of the anti-rotation support plate (3) is used for being fixedly connected with the second nut (200), the second end of the anti-rotation support plate (3) is also used for fixedly supporting the torque multiplier (500), the first end of the first wrench (2) is used for being connected with the spline shaft sleeve on the output shaft, and the second end of the first wrench (2) is used for being clamped with the torque multiplier (500), the torque multiplier (500) is used for rotating the output shaft through the first wrench (2) to assemble or disassemble the second nut (200); The second dismounting assembly comprises a support ring (6), a second wrench (7) and a second support (8), the second support (8) is used for being connected on the mounting frame (300) and being fixedly connected with the first nut (100) at the first end of the second support (8), the support ring (6) is used for being connected on the mounting frame (300) and being fixedly supporting the torque multiplier (500) at the second end through being connected with the mounting frame (300) at the first end, the second wrench (7) is used for being connected with the spline shaft sleeve on the output shaft, and the second end of the second wrench (7) is used for being clamped with the torque multiplier (500), the torque multiplier (500) is also used for rotating the output shaft through the second wrench (7) to assemble or disassemble the first nut (100).

2. A nut removal device for long shaft parts according to claim 1, characterized in that The mounting frame (300) comprises a first support plate (301), a second support plate (302) and a connecting column (303), the first support plate (301) and the second support plate (302) are arranged in parallel in the vertical direction, the connecting column (303) is used for connecting and fixing the first support plate (301) and the second support plate (302), the first support plate (301) is provided with a first limiting groove (304), the first limiting groove (304) is used for mounting the anti-rotation support plate (3) or the support ring (6), and the second support plate (302) is provided with a second limiting groove (305) opposite to the first limiting groove (304), the second limiting groove (305) is used for limiting and fixing the output shaft in the vertical direction.

3. A nut removal device for long shaft parts according to claim 2, characterized in that The first end of the first support (1) is provided with a first mounting platform (11), the first mounting platform (11) is connected on the second support plate (302) through bolts, the end face of the second end of the first support (1) is provided with a clamping groove (12), and the clamping groove (12) is used for clamping the lug on the outer ring when the first support (1) supports the outer ring of the bearing.

4. The nut removal device for long shaft parts according to claim 2, characterized in that, The anti-rotation support plate (3) comprises a support plate body (31), a second mounting platform (32) and a first protrusion (33), the support plate body (31) is a hollow cylindrical structure, the top end of the support plate body (31) is provided with the second mounting platform (32), the second mounting platform (32) is used for being connected on the first support plate (301) through bolts, and the bottom end of the support plate body (31) is provided with a plurality of first protrusions (33) in an annular array, and the first protrusions (33) are used for being clamped with the second limiting grooves prearranged on the second nut (200).

5. The nut removal device for long shaft parts according to claim 2, characterized in that, The second support (8) is a hollow cylindrical structure, the bottom end of the second support (8) is provided with a fifth mounting platform (81), the fifth mounting platform (81) is used for being connected on the second support plate (302) through bolts, and the top end of the second support (8) is provided with a plurality of second protrusions (82) in an annular array, and the second protrusions (82) are used for being clamped with the first limiting grooves prearranged on the first nut (100).

6. A nut removal device for long shaft parts according to claim 2, characterized in that The bottom end of the support ring (6) is provided with a fourth mounting platform (61), the fourth mounting platform (61) is used for being connected on the first support plate (301) through bolts, the torque multiplier (500) penetrates through the support ring (6), the top end of the support ring (6) is provided with a second hexagonal hole (62), and the second hexagonal hole (62) is used for being clamped with the hexagonal head prearranged on the torque multiplier (500) to fix and support the torque multiplier (500).

7. The nut removal device for long shaft parts according to claim 1, characterized in that, The nut dismounting device of the long-axis part further comprises a connecting support plate (5), the first end of the connecting support plate (5) is connected with the anti-rotation support plate (3), the second end of the connecting support plate (5) is used for fixing and supporting the torque multiplier (500), the connecting support plate (5) is a hollow cylindrical structure, the bottom end of the connecting support plate (5) is provided with a third mounting platform (51), the third mounting platform (51) is used for being connected with the anti-rotation support plate (3) through the locking piece (4), the torque multiplier (500) penetrates through the connecting support plate (5) and the anti-rotation support plate (3) in sequence, the top end of the connecting support plate (5) is provided with a first hexagonal hole (52), and the first hexagonal hole (52) is used for being clamped with the hexagonal head prearranged on the torque multiplier (500) to fix and support the torque multiplier (500).

8. The nut removal device for long shaft parts according to claim 1, characterized in that, The bottom outer wall of the first wrench (2) is provided with a first outer spline (21), the first outer spline (21) is used for being matched with the inner spline of the spline shaft sleeve on the output shaft, the top end of the first wrench (2) is provided with a first quadrangular hole (22), and the first quadrangular hole (22) is used for being clamped with the quadrangular head prearranged on the torque multiplier (500); the bottom outer wall of the second wrench (7) is provided with a second outer spline (72), the second outer spline (72) is used for being matched with the inner spline of the spline shaft sleeve on the output shaft, and the top end of the second wrench (7) is provided with a second quadrangular hole (71), and the second quadrangular hole (71) is used for being clamped with the quadrangular head prearranged on the torque multiplier (500).

9. A nut removal device for long shaft parts according to claim 8, characterized in that The nut dismounting device of the long shaft part further comprises an adapter (600) for replacing the torque multiplier (500) and the first wrench (2) or the second wrench (7) joint, the bottom end of the adapter (600) is provided with an adapter quadrilateral head (602) for jointing with the first quadrilateral hole (22) of the first wrench (2) or the second quadrilateral hole (71) of the second wrench (7), and the top end of the adapter (600) is provided with a third quadrilateral hole (601) for jointing with the torque wrench.

10. A nut dismounting method of a long shaft part, using the nut dismounting device of the long shaft part according to any one of claims 1-9, comprising the following steps: When the second nut (200) needs to be assembled, first, the second nut (200) is pre-tightened and sleeved on the output shaft at a preset mounting position, the first support (1) is connected to the mounting frame (300), the small end of the output shaft is placed on the first support (1) with the small end downward and the outer ring of the bearing on the output shaft is supported by the first support (1), the state of the output shaft is checked to ensure that the output shaft can rotate freely; the first wrench (2) is sleeved into the spline shaft sleeve on the output shaft; the first end of the anti-rotation support plate (3) is connected to the mounting frame (300), and the second end of the anti-rotation support plate (3) is connected to the second nut (200); the first end of the connecting support plate (5) is connected to the anti-rotation support plate (3), and the second end of the connecting support plate (5) is fixed to support the torque multiplier (500), the torque multiplier (500) is jointed with the second end of the first wrench (2); the torque of the torque multiplier (500) is set to 1 / 16 of the actual required tightening torque, the torque multiplier (500) is twisted to drive the first wrench (2) and the output shaft to rotate, and then the second nut (200) is assembled and fastened on the output shaft; When the second nut (200) needs to be disassembled from the output shaft, the second nut (200) can be loosened and removed by reversing the torque multiplier (500); When the first nut (100) needs to be assembled, the first nut (100) is pre-tightened and sleeved on the output shaft at a preset mounting position, the second support (8) is replaced by the first support (1) and mounted on the mounting frame (300), the small end of the output shaft is placed on the second support (8) with the small end downward and the first end of the second support (8) is connected to the first nut (100) for fixation; the support ring (6) is connected to the mounting frame (300) by replacing the anti-rotation support plate (3), and the support ring (6) supports the torque multiplier (500); the second wrench (7) is sleeved into the spline shaft sleeve on the output shaft by replacing the first wrench (2); the torque multiplier (500) is jointed with the second end of the second wrench (7); the torque of the torque multiplier (500) is set to 1 / 16 of the actual required tightening torque, the torque multiplier (500) is twisted to drive the second wrench (7) and the output shaft to rotate, and then the first nut (100) is assembled and fastened on the output shaft; When the first nut (100) needs to be disassembled from the output shaft, the first nut (100) can be unscrewed and removed by reversing the torque multiplier (500).

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