Installation and disassembly assembly, shaft and bearing assembly, installation method and disassembly method

Abstract

A mounting and disassembly assembly comprises an outer sleeve (1), an inner sleeve (2) and a support ring (3), wherein the outer circumferential surface of the outer sleeve (1) is formed with a first mounting surface (1s1) for mounting a bearing (BE), and the inner circumferential surface of the outer sleeve (1) is formed with a first conical surface (1s2). The inner circumferential surface of the inner sleeve (2) is formed with a second mounting surface (2s1) for mounting on a shaft (SH), the outer circumferential surface of the inner sleeve (2) is formed with a threaded portion (21) and a second conical surface (2s2), and the support ring (3) is threadedly engaged with the threaded portion (21). The bearing (BE) is pre-mounted on the outer sleeve (1) and the first conical surface (1s2) is slid on the second conical surface (2s2) to achieve mounting, thereby avoiding damage to the bearing during mounting and facilitating disassembly. Also provided are a shaft and bearing assembly comprising the mounting and disassembly assembly, and a mounting method and a disassembly method using the mounting and disassembly assembly.

Description

Technical Field

[0001] The present application relates to the field of installation and disassembly of shafts and bearings, and in particular to an installation and disassembly assembly and a shaft and bearing assembly including the installation and disassembly assembly, as well as an installation method for installing a bearing on a shaft using the installation and disassembly assembly and a disassembly method for disassembling a bearing from a shaft. Background Art

[0002] In the prior art, for bearings such as thrust bearings, the bearings are usually directly mounted on the shaft when in use. However, this method of directly mounting the bearing on the shaft has the following problems.

[0003] On the one hand, when the bearing is installed by the above method, the mechanical force may be transmitted through the rolling elements of the bearing, which may cause damage to the raceways of the inner and outer rings and reduce the bearing life; on the other hand, when the bearing needs to be removed from the shaft, the removal process will be quite difficult. Therefore, a method is urgently needed to prevent the bearing from being damaged during the bearing installation process and facilitate the removal of the bearing. Summary of the invention

[0004] This application is made based on the defects of the above-mentioned prior art. One purpose of this application is to provide a new type of installation and disassembly assembly, which can not only prevent the bearing from being damaged during the installation process, but also facilitate the disassembly of the bearing by using the installation and disassembly assembly. Another purpose of this application is to provide a shaft and bearing assembly including the above-mentioned installation and disassembly assembly. Another purpose of this application is to provide an installation method for installing a bearing using the above-mentioned installation and disassembly assembly and a disassembly method for disassembling a bearing.

[0005] In order to achieve the above-mentioned invention objectives, this application adopts the following technical solutions.

[0006] The present application provides a mounting and disassembly assembly as follows, which is used to mount a bearing on a shaft and disassemble the bearing from the shaft, and the mounting and disassembly assembly comprises:

[0007] An outer sleeve, wherein the outer circumferential surface of the outer sleeve is formed with a first mounting surface for mounting the bearing, and the inner circumferential surface of the outer sleeve is formed with a first conical surface, the first conical surface extends radially outward and extends along the axial direction of the mounting and disassembly assembly to one axial end of the outer sleeve;

[0008] An inner sleeve, wherein the inner circumferential surface of the inner sleeve is formed with a second mounting surface for mounting on the shaft, and the outer circumferential surface of the inner sleeve is formed with a threaded portion and a second conical surface, the threaded portion is located on one axial end side of the second conical surface, the second conical surface extends radially inward from the threaded portion and extends along the axial direction to the other axial end of the inner sleeve, and in a state where the second conical surface is located radially inward of the first conical surface and contacts the first conical surface, the inner sleeve and the outer sleeve can move relative to each other in the axial direction; and

[0009] A support ring is threadedly engaged with the threaded portion, and the support ring and the inner sleeve are capable of relative movement in the axial direction while maintaining the threaded engagement.

[0010] In an optional solution, the mounting and disassembly assembly further includes a locking nut, which is used to engage with the shaft thread to limit the axial position of the outer sleeve relative to the shaft at the other axial end of the outer sleeve.

[0011] In another optional solution, the installation and removal assembly further includes a locking bolt.

[0012] The inner circumferential surface of the locking nut is formed with an annular groove extending along the circumferential direction of the mounting and disassembly assembly. When the mounting and disassembly assembly is mounted on the shaft, the locking nut abuts against the outer sleeve.

[0013] The locking nut is formed with a mounting hole extending along the axial direction, the mounting hole extends through the annular groove, and the locking bolt is installed in the mounting hole to lock the axial position of the locking nut relative to the shaft.

[0014] In another optional solution, the outer sleeve is formed with a first step structure, the bottom surface of the first step structure is the first mounting surface, and the first step structure and the support ring are used to limit the axial position of the bearing.

[0015] In another optional solution, the support ring is formed with a second step structure, and the bottom surface of the second step structure is a third mounting surface for supporting the bearing.

[0016] In another optional solution, the outer sleeve is formed with an inner oil groove on the first conical surface, the inner oil groove is open radially inward, and an oil supply passage connected to the inner oil groove is also formed inside the outer sleeve.

[0017] In another optional scheme, the inner oil groove includes a circumferential oil groove and a plurality of axial oil grooves, the plurality of axial oil grooves are arranged at intervals in the circumferential direction of the mounting and disassembly assembly, each of the axial oil grooves extends along the axial direction, and the circumferential oil groove extends continuously along the circumference and is connected to each of the axial oil grooves.

[0018] In another optional solution, the inner sleeve forms a plurality of grooves on the second mounting surface, the plurality of grooves are arranged spaced apart in the circumferential direction of the mounting and disassembly assembly, and each of the grooves is open radially inward and extends along the axial direction.

[0019] In another optional solution, the support ring is formed with a fixing hole penetrating along the axial direction, and the fixing hole faces an axial end surface of the inner sleeve.

[0020] The installation and disassembly assembly also includes a fixing piece, which passes through the fixing hole and abuts against an axial end surface of the inner sleeve, so that the inner sleeve and the support ring are relatively fixed.

[0021] In another optional scheme, the outer sleeve is formed with a first disassembly hole extending along the axial direction, and the locking nut is formed with a second disassembly hole matching the first disassembly hole, and the second disassembly hole passes through the locking nut along the axial direction, and the second disassembly hole can be aligned with the first disassembly hole by rotating the locking nut relative to the axis.

[0022] In another optional solution, the support ring is formed with a third disassembly hole extending along the axial direction, and the second disassembly hole can be aligned with the third disassembly hole by rotating the locking nut relative to the shaft.

[0023] The present application also provides a shaft and bearing assembly as follows, comprising a shaft, a bearing and an installation and disassembly assembly as described in any one of the above technical solutions, wherein the outer sleeve, inner sleeve and support ring of the installation and disassembly assembly are at least partially located between the shaft and the bearing, and the bearing is installed on the shaft and removed from the shaft via the installation and disassembly assembly.

[0024] In an optional solution, a shaft oil supply passage is formed inside the shaft, and an oil outlet of the shaft oil supply passage is arranged on the outer circumferential surface of the shaft and faces the second mounting surface of the inner sleeve.

[0025] In another optional solution, the shaft is formed with a shoulder, and the shoulder abuts against the support ring, so that the shoulder axially limits the installation and disassembly assembly.

[0026] The present application also provides a method for installing a bearing on a shaft using the installation and removal assembly described in any one of the above technical solutions, comprising the following steps:

[0027] Fixing the bearing sleeve to the first mounting surface of the outer sleeve so that the bearing abuts against the first step structure of the outer sleeve;

[0028] Inserting the inner sleeve into the outer sleeve so that the second conical surface contacts the first conical surface;

[0029] Threading the support ring with the inner sleeve, adjusting the threaded engagement length of the support ring with the inner sleeve so that a predetermined axial clearance exists between the bearing and the support ring axial limiting surface of the support ring, and then fixing the support ring with the inner sleeve;

[0030] Sleeve the assembly consisting of the outer sleeve, the inner sleeve, the support ring and the bearing onto the shaft so that the support ring abuts against the shoulder of the shaft;

[0031] The outer sleeve is pushed so that the outer sleeve and the bearing move relative to the inner sleeve in the axial direction, and finally the bearing abuts against the support ring axial limiting surface of the support ring along the axial direction.

[0032] In an optional solution, during the process of pushing the outer sleeve, hydraulic oil is supplied between the first conical surface and the second conical surface through the oil supply passage of the outer sleeve.

[0033] In another optional solution, after the bearing is finally abutted against the support ring axial limiting surface of the support ring along the axial direction, the locking nut of the mounting and disassembly assembly is installed on the shaft so that the locking nut abuts against the outer sleeve.

[0034] The present application also provides a disassembly method for disassembling a bearing from a shaft using the mounting and disassembly assembly described in some of the above solutions, comprising the following steps:

[0035] The outer sleeve is separated from the inner sleeve while hydraulic oil is supplied to the oil supply passage of the outer sleeve, and the outer sleeve is removed from the shaft.

[0036] The present application also provides a disassembly method for disassembling a bearing from a shaft using the installation and disassembly assembly described in any one of the above technical solutions, comprising the following steps:

[0037] Using a screw that passes through a locking nut fixed to the shaft or a disassembly plate abutting against the shaft and is screwed into the first disassembly hole of the outer sleeve, the outer sleeve and the bearing are disassembled from the shaft; and

[0038] Then, the inner sleeve is removed from the shaft by using a screw that passes through the locking nut or the removal plate and is screwed into the third removal hole of the support ring.

[0039] In an optional solution, during the process of removing the inner sleeve from the shaft, hydraulic oil is supplied between the shaft and the inner sleeve through the shaft oil supply passage of the shaft.

[0040] By adopting the above technical solution, the present application provides a novel installation and disassembly assembly, which is used to install a bearing on a shaft and disassemble the bearing from the shaft. The installation and disassembly assembly includes an outer sleeve, an inner sleeve and a support ring. The outer circumferential surface of the outer sleeve is formed with a first installation surface for installing the bearing, and the inner circumferential surface of the outer sleeve is formed with a first conical surface, which extends radially outward and extends to one axial end of the outer sleeve along the axial direction of the installation and disassembly assembly. The inner circumferential surface of the inner sleeve is formed with a second installation surface for installing on the shaft, and the outer circumferential surface of the inner sleeve is formed with a threaded portion and a second conical surface, the threaded portion is located at one axial end side of the second conical surface, and the second conical surface extends from the threaded portion toward the radial inner side and extends axially to the other axial end of the inner sleeve, and the inner sleeve and the outer sleeve can move relative to each other in the axial direction when the second conical surface is located radially inward of the first conical surface and contacts the first conical surface. The support ring is threadedly engaged with the threaded portion, and the support ring and the inner sleeve can move relative to each other in the axial direction while maintaining the threaded engagement.

[0041] In this way, when the bearing is installed on the shaft, the bearing is pre-installed on the outer sleeve and installed by sliding the first conical surface of the outer sleeve on the second conical surface of the inner sleeve. Therefore, during the installation process, the situation that the inner and outer raceways of the bearing are damaged due to the mechanical force transmitted by the rolling body as described in the background technology is avoided. Moreover, when disassembly is required, it can be conveniently disassembled by sliding the first conical surface of the outer sleeve on the second conical surface of the inner sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1A It is a stereoscopic diagram showing the structure of a mounting and disassembly assembly according to an embodiment of the present application.

[0043] Figure 1B It shows Figure 1A A three-dimensional view of the structure of the outer sleeve of the installation and disassembly component.

[0044] Figure 1C It shows Figure 1A A three-dimensional view of the structure of the inner sleeve of the installation and disassembly component.

[0045] Figure 1D It shows Figure 1AA three-dimensional view of the structure of the support ring of the installation and removal assembly.

[0046] Figure 1E It shows Figure 1A A three-dimensional view of the structure of the locking nut of the installation and disassembly component.

[0047] FIG. 2A to FIG. 2F It is a schematic diagram for illustrating a method for installing a bearing using a mounting and disassembly assembly according to an embodiment of the present application.

[0048] Figure 3A and Figure 3B It is a schematic diagram for illustrating a disassembly method of disassembling a bearing using an installation and disassembly assembly according to an embodiment of the present application.

[0049] Figure 4A and Figure 4B It is a schematic diagram for illustrating another disassembly method of disassembling a bearing using a mounting and disassembly assembly according to an embodiment of the present application.

[0050] Description of Reference Numerals

[0051] 1 outer sleeve 11 first large diameter portion 12 first small diameter portion 1s1 first cylindrical surface (first mounting surface) 1s2 first conical surface 1c1 axial oil groove 1c2 circumferential oil groove 1p oil supply passage 1h1 oil inlet 1h2 oil outlet 1h3 first removal hole

[0052] 2 inner sleeve 21 threaded portion 22 tapered portion 2s1 second cylindrical surface (second mounting surface) 2s2 second tapered surface 2c groove

[0053] 3 support ring 31 second large diameter portion 32 second small diameter portion 33 fixing member 3s third cylindrical surface (third mounting surface) 3h1 fixing hole 3h2 third disassembly hole

[0054] 4 Locking nut 4c Ring groove 4h1 Mounting hole 4h2 Second disassembly hole

[0055] 5 Locking bolt

[0056] SH shaft op shaft oil supply passage BE bearing CO end cover SE bearing seat TR screw

[0057] A is axial and R is radial. DETAILED DESCRIPTION

[0058] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all feasible methods of the present application, nor to limit the scope of the present application.

[0059] According to the installation and disassembly assembly of the present application, the outer sleeve, inner sleeve, support ring and locking nut are all rotating bodies with a central axis, and these components are assembled in a coaxial manner. In the present application, unless otherwise specified, "axial", "radial" and "circumferential" refer to the axial, radial and circumferential directions of the installation and disassembly assembly as a whole in the assembled state, respectively. In addition, "radially inner side" refers to the side radially close to the central axis of the installation and disassembly assembly, and "radially outer side" refers to the side radially away from the central axis of the installation and disassembly assembly.

[0060] The structure of the installation and removal assembly according to an embodiment of the present application will be described below in conjunction with the accompanying drawings.

[0061] (Structure of an installation and removal assembly according to an embodiment of the present application)

[0062] According to an embodiment of the present application, the installation and disassembly assembly is used to install the bearing BE on the shaft SH and to disassemble the bearing BE from the shaft SH, which can prevent the bearing BE from being damaged while facilitating the installation and disassembly process. Figures 1A to 1E As shown, the installation and disassembly assembly according to one embodiment of the present application includes an outer sleeve 1, an inner sleeve 2, a support ring 3, a locking nut 4 and a locking bolt 5 (see, for example, Figure 2E ).

[0063] In this embodiment, if Figure 1A and Figure 1B As shown, the outer sleeve 1 is formed into a cylindrical shape. The outer sleeve 1 includes a first large diameter portion 11 and a first small diameter portion 12 connected to each other, and the outer diameter of the first large diameter portion 11 is larger than the outer diameter of the first small diameter portion 12. Thus, a first step structure is formed on the outer periphery of the outer sleeve 1 through the first large diameter portion 11 and the first small diameter portion 12. At the first small diameter portion 12, the outer peripheral surface of the outer sleeve 1 is formed with a first cylindrical surface 1s1 (an example of a first mounting surface) for mounting the bearing BE, and the first cylindrical surface 1s1 serves as the bottom surface of the first step structure. Moreover, at the first small diameter portion 12, the inner peripheral surface of the outer sleeve 1 is formed with a first conical surface 1s2, and the first conical surface 1s2 extends toward the radial outside and extends along the axial direction A to one axial end of the outer sleeve 1 (the first small diameter portion 12 or the end of the outer sleeve 1 away from the first large diameter portion 11). In other words, the inner diameter of the portion of the outer sleeve 1 corresponding to the first conical surface 1s2 gradually increases toward one axial end thereof.

[0064] Furthermore, since the outer sleeve 1 and the inner sleeve 2 will move (slide) relative to each other in a state where the first conical surface 1s2 of the outer sleeve 1 cooperates with the second conical surface 2s2 described below of the inner sleeve 2, in order to facilitate such relative movement, Figure 1BAs shown, an inner oil groove is formed on the first conical surface 1s2 of the outer sleeve 1. The inner oil groove is open toward the radial inside but closed in other directions. The inner oil groove includes a plurality of axial oil grooves 1c1 and a circumferential oil groove 1c2. Each axial oil groove 1c1 extends along (including substantially along) the axial direction A, and the plurality of axial oil grooves 1c1 are arranged at intervals in the circumferential direction of the outer sleeve 1. The circumferential oil groove 1c2 extends continuously along the circumference over the entire circumference to connect the plurality of axial oil grooves 1c1 together. As shown in FIG. Figure 1B , Figure 2B , Figure 2C and Figure 2E As shown, an oil supply passage 1p connected to the inner oil groove is also formed inside the outer sleeve 1. The oil supply passage 1p is provided with an oil inlet 1h1 at the first large diameter portion 11 and an oil outlet 1h2 is provided in the inner oil groove. The oil outlet 1h2 can be provided in the axial oil groove 1c1 or the circumferential oil groove 1c2, preferably in the vicinity of the intersection of the two. The oil supply passage 1p may include an axial passage and a radial passage that are connected to each other. It can be understood that a portion of the oil supply passage 1p close to the oil inlet 1h1 may be formed with a thread connected to the oil supply pipeline of the oil supply device. In this way, the hydraulic oil is supplied through the oil supply passage 1p, which can provide oil pressure and form an oil film between the first conical surface 1s2 and the second conical surface 2s2, thereby facilitating the relative movement between the outer sleeve 1 and the inner sleeve 2 during the installation and disassembly process.

[0065] Further, in order to facilitate the removal of the tool (the screw TR described below, see Figure 3A ) connection, such as Figure 1B , Figure 3A and Figure 4A As shown, the outer sleeve 1 is formed with a plurality of first disassembly holes 1h3 on the end surface of the other axial end of the outer sleeve 1 (the first large diameter portion 11 or the end of the outer sleeve 1 away from the first small diameter portion 12). The plurality of first disassembly holes 1h3 are evenly distributed at intervals in the circumferential direction, and each first disassembly hole 1h3 is formed with an internal thread that is threadedly engaged with a disassembly tool. By rotating the locking nut 4 on the shaft SH, the second disassembly hole 4h2 of the locking nut 4 described below can be made to be opposite to the first disassembly hole 1h3, so that the disassembly tool can be installed in the second disassembly hole 4h2 and the first disassembly hole 1h3.

[0066] In this embodiment, if Figure 1A and Figure 1CAs shown, the inner sleeve 2 is formed into a cylindrical shape. The inner sleeve 2 includes a threaded portion 21 and a tapered portion 22 connected to each other, the threaded portion 21 is located at one axial end side of the tapered portion 22, and the outer diameter of the threaded portion 21 is greater than the maximum outer diameter of the tapered portion 22. At the threaded portion 21, the outer peripheral surface of the inner sleeve 2 is formed with an external thread for threaded engagement with the support ring 3. At the tapered portion 22, the outer peripheral surface of the inner sleeve 2 forms a second conical surface 2s2, and the second conical surface 2s2 extends from the threaded portion 21 toward the radial inner side while extending to the other axial end of the inner sleeve 2 (the end of the tapered portion 22 or the inner sleeve 2 away from the threaded portion 21). In other words, the outer diameter of the tapered portion 22 gradually decreases from the threaded portion 21 toward the other axial end of the inner sleeve 2. Moreover, in order to make the second conical surface 2s2 of the inner sleeve 2 and the first conical surface 1s2 of the outer sleeve 1 match in shape, the inclination angle of the second conical surface 2s2 relative to the axial direction A is the same as the inclination angle of the first conical surface 1s2 relative to the axial direction A. Thus, when the second conical surface 2s2 is located radially inside the first conical surface 1s2 and cooperates with the first conical surface 1s2, the inner sleeve 2 and the outer sleeve 1 can move relative to each other in the axial direction A. The inner peripheral surface of the inner sleeve 2 is formed with a second cylindrical surface 2s1 (an example of a second mounting surface) for mounting on the shaft SH.

[0067] Furthermore, in order to improve the elastic deformation capability of the inner sleeve 2, as Figure 1C As shown, a plurality of grooves 2c are formed on the second cylindrical surface 2s1 of the inner sleeve 2. The plurality of grooves 2c are arranged at intervals in the circumferential direction of the inner sleeve 2, each groove 2c extends along (including substantially along) the axial direction A, and each groove 2c is open toward the radial inside and closed in other directions.

[0068] Furthermore, if Figure 2A As shown, the end surface of one axial end of the inner sleeve 2 (the threaded portion 21 or the end of the inner sleeve 2 away from the tapered portion 22) corresponds to the fixing hole 3h1 described below of the support ring 3. The mounting and disassembly assembly further includes a fixing member 33 such as a bolt, and when the fixing member 33 is inserted through the fixing hole 3h1, the fixing member 33 is threadedly engaged with the support ring 3, and the fixing member 33 abuts against the end surface of one axial end of the inner sleeve 2, so that the inner sleeve 2 and the support ring 3 can be relatively fixed.

[0069] In this embodiment, if Figure 1A and Figure 1DAs shown, the support ring 3 is formed into a cylindrical shape. The support ring 3 includes a second large diameter portion 31 and a second small diameter portion 32 connected to each other, and the outer diameter of the second large diameter portion 31 is larger than the outer diameter of the second small diameter portion 32. Thus, a second step structure is formed on the outer periphery of the support ring 3 by the second large diameter portion 31 and the second small diameter portion 32. At the second small diameter portion 32, the outer peripheral surface of the support ring 3 is formed with a third cylindrical surface 3s (an example of a third mounting surface) for mounting the bearing BE, and the third cylindrical surface 3s serves as the bottom surface of the second step structure. While the bottom surfaces of both the second step structure and the first step structure (the first cylindrical surface 1s1 and the third cylindrical surface 3s) support the bearing BE, the large diameter portions of both the second step structure and the first step structure (the first large diameter portion 11 and the second large diameter portion 31) are also used to limit the axial position of the bearing BE. Here, the surface of the first large diameter portion 11 facing one axial end side can be referred to as the axial limiting surface of the outer sleeve, and the surface of the second large diameter portion 31 facing the other axial end side ( Figure 2E The end surface (left side in the figure) is called the support ring axial limit surface, and the outer sleeve axial limit surface and the support ring axial limit surface define the axial position of the bearing BE. In addition, the inner circumferential surface of the support ring 3 is also formed with an internal thread corresponding to the external thread of the threaded portion 21 of the inner sleeve 2, so that the support ring 3 can be threadedly engaged with the inner sleeve 2, and then the support ring 3 is installed on the threaded portion 21 in a manner that it can move relative to the inner sleeve 2 in the axial direction A.

[0070] Furthermore, if Figure 1D As shown, the support ring 3 is formed with a plurality of fixing holes 3h1 penetrating along the axial direction A, and the fixing holes 3h1 are evenly distributed in the circumferential direction. The support ring 3 is formed with internal threads in the fixing holes 3h1 for threaded engagement with the external threads of the fixing member 33. In addition, each fixing hole 3h1 faces the end surface of one axial end of the inner sleeve 2, so that the fixing member 33 passing through the fixing hole 3h1 can abut against the end surface of one axial end of the inner sleeve 2.

[0071] Furthermore, if Figure 1D As shown, the support ring 3 is formed with a third disassembly hole 3h2 penetrating along the axial direction A, and a plurality of third disassembly holes 3h2 are evenly distributed at intervals in the circumferential direction, and each third disassembly hole 3h2 is formed with an internal thread that is threadedly engaged with a disassembly tool. By rotating the locking nut 4 on the shaft SH, the second disassembly hole 4h2 of the locking nut 4 can be made to face the third disassembly hole 3h2, so that the disassembly tool can be installed in the second disassembly hole 4h2 and the third disassembly hole 3h2.

[0072] In this embodiment, if Figure 1A and Figure 1E As shown, the inner peripheral surface of the lock nut 4 is formed with an internal thread that is threadedly engaged with the shaft SH, so that the lock nut 4 can be threadedly engaged with the shaft SH. Figure 2EAs shown, when the assembly is installed on the shaft SH, the locking nut 4 will abut against the outer sleeve 1 to limit the axial position of the outer sleeve 1 relative to the shaft SH. In addition, the inner circumferential surface of the locking nut 4 is formed with an annular groove 4c extending continuously along the entire circumference. The annular groove 4c is open toward the radial inside and recessed toward the radial outside. The annular groove 4c disconnects the internal thread of the locking nut 4 in the axial direction A. Figure 1E As shown, the locking nut 4 is formed with a mounting hole 4h1 extending along the axial direction A, and the mounting hole 4h1 extends through the annular groove 4c. Specifically, the portion of the mounting hole 4h1 located at one axial end side of the annular groove 4c may be formed with a thread, and the portion of the mounting hole 4h1 located at the other axial end side of the annular groove 4c may not be formed with a thread. Figure 2E As shown, the locking bolt 5 is installed in the mounting hole 4h1 and threadedly engaged with the mounting hole 4h1, so that the parts on both sides of the annular groove 4c of the locking nut 4 clamp the threads of the shaft SH, thereby limiting the axial position of the locking nut 4 relative to the shaft SH, that is, the locking nut 4 is relatively fixed to the shaft SH.

[0073] Furthermore, if Figure 1E As shown, the locking nut 4 is formed with a second disassembly hole 4h2 that matches the first disassembly hole 1h3 and the third disassembly hole 3h2, and the second disassembly hole 4h2 passes through the locking nut 4 along the axial direction A. By rotating the locking nut 4 on the shaft SH, the second disassembly hole 4h2 can be aligned with the first disassembly hole 1h3 of the outer sleeve 1 or the third disassembly hole 3h2 of the support ring 3, so that the disassembly tool can be installed in the second disassembly hole 4h2 and the first disassembly hole 1h3 or in the second disassembly hole 4h2 and the third disassembly hole 3h2.

[0074] The following will be combined FIG. 2A to FIG. 2F A method for mounting the bearing BE on the shaft SH using the above-mentioned mounting and dismounting assembly will be described.

[0075] (Installation method)

[0076] In the following installation method, the installation method using the above-mentioned installation and removal assembly is explained by taking the installation of a pair of thrust bearings BE on the shaft SH as an example.

[0077] First, if Figure 2AAs shown, the bearing BE is installed on the first cylindrical surface 1s1 of the outer sleeve 1. Specifically, the bearing BE and the outer sleeve 1 need to be installed together through interference fit, so the bearing BE needs to be heated or the outer sleeve 1 needs to be cooled before installation. Afterwards, the outer sleeve 1 is placed on a horizontal mounting support surface, and then a pair of thrust bearings BE are installed on the first cylindrical surface 1s1 of the outer sleeve 1 from a vertical direction. After the pair of thrust bearings BE are installed in place, the rib of the bearing BE is positioned against the first step structure of the outer sleeve 1 (against the first large diameter portion 11). After completing the above assembly, the assembly consisting of the bearing BE and the outer sleeve 1 is placed at room temperature.

[0078] Furthermore, if Figure 2A As shown, the inner sleeve 2 is installed into the outer sleeve 1. Specifically, the inner sleeve 2 is installed from the vertical direction into the assembly consisting of the bearing BE and the outer sleeve 1 placed on the horizontal mounting support surface, so that the first conical surface 1s2 and the second conical surface 2s2 match each other. Moreover, in order to ensure that the inner sleeve 2 will not be separated from the outer sleeve 1 during transportation, the inner sleeve 2 can be pressed into the outer sleeve 1 for a certain distance in the vertical direction, but it is necessary to ensure that the inner diameter of the inner sleeve 2 is still larger than the outer diameter of the shaft SH to be installed.

[0079] Furthermore, if Figure 2A As shown, the support ring 3 is installed on the inner sleeve 2, and the two are threadedly engaged. After the inner sleeve 2 and the support ring 3 are threadedly engaged, on the one hand, according to the actual sizes of the inspection points on the inspection reports of the outer sleeve 1 and the inner sleeve 2, the relative positions of the first conical surface 1s2 of the outer sleeve 1 and the second conical surface 2s2 of the inner sleeve 2 when they are in surface contact are determined, and the outer sleeve 1 is pushed so that the outer sleeve 1 and the inner sleeve 2 are in a predetermined relative position, so that the clearance required for clearance fit is achieved between the inner sleeve 2 and the shaft SH; on the other hand, according to the actual width size on the inspection reports of the support ring 3 and the bearing BE, the threaded engagement length of the external thread of the inner sleeve 2 and the internal thread of the support ring 3 is adjusted to ensure the advancement distance of the outer sleeve 1 on the inner sleeve 2 in the subsequent installation steps. This advancement distance is FIG. 2A to FIG. 2C The axial spacing between the flange of the bearing BE and the second step structure (second large diameter portion 31) of the support ring 3 is shown in FIG. When the flange of the bearing BE contacts the second step structure of the support ring 3, the inner sleeve 2 and the shaft SH can be guaranteed to achieve the interference fit required.

[0080] It should be noted that if the actual size of the shaft diameter exceeds the tolerance, the relative position of the support ring 3 and the inner sleeve 2 must be adjusted. The relative position needs to be adjusted according to the actual size of the shaft diameter to ensure that the various components (i.e., shaft SH, inner sleeve 2, outer sleeve 1, bearing inner ring) achieve interference fit in the subsequent installation steps. It should be noted that the above adjustment process is limited by parameters such as the maximum tangential stress allowed by the material of the bearing inner ring and its geometric dimensions. The thread engagement length of the internal thread of the support ring 3 and the external thread of the inner sleeve 2 can be adjusted by Figure 1A and Figure 2A The adjusting handle shown in is adjusted. After the position of the support ring 3 is determined, the adjusting handle is removed, and the support ring 3 and the inner sleeve 2 are relatively fixed with a fixing member 33 such as a locking screw. Figure 2A A schematic diagram showing the components after the above installation process is completed.

[0081] Secondly, if Figure 2B As shown in FIG. 1 , if the bearing seat SE needs to be installed, the assembly after the above installation process is turned over (i.e., turned upside down) and installed in the bearing seat SE placed on the horizontal mounting support surface, and then the end cover CO is installed, and the end cover CO and the bearing seat SE are connected together with bolts, and finally the following is obtained: Figure 2B The assembly shown. Subsequently, the assembly consisting of the bearing BE, the outer sleeve 1, the inner sleeve 2, the support ring 3, the bearing seat SE and the end cover CO is installed on the shaft SH from the horizontal direction or the vertical direction until the axial end surface of the second large diameter portion 31 of the support ring 3 abuts against the shaft shoulder of the shaft SH. The entire assembly is axially positioned by the abutment between the support ring 3 and the shaft shoulder of the shaft SH. Since the inner diameter of the outer sleeve 1 is slightly larger than the shaft diameter, the inner sleeve 2 and the support ring 3 are clearance fit with the shaft SH in this step, so the process can achieve the above installation process without any auxiliary device.

[0082] Furthermore, if Figure 2C and Figure 2D As shown, a hydraulic nut and a hydraulic pump connector are installed on the shaft SH. The hydraulic nut is used to apply axial thrust to the outer sleeve 1 until the flange of the bearing BE contacts the second large diameter portion 31 of the support ring 3. In the above process, the inner oil groove on the first conical surface 1s2 of the outer sleeve 1 provides oil pressure and forms an oil film between the first conical surface 1s2 of the outer sleeve 1 and the second conical surface 2s2 of the inner sleeve 2, thereby reducing the friction between the first conical surface 1s2 and the second conical surface 2s2, thereby reducing the axial thrust. The end face of the outer sleeve 1 can be detected to the end face of the shaft SH ( Figure 2CThe distance between the left end face in the bearing and the outer sleeve 1 is used to determine whether the bearing BE is installed in place. After determining that the bearing is installed in place, the hydraulic nut needs to maintain pressure for a predetermined time; otherwise, the hydraulic nut needs to continue to be pushed forward, and then the hydraulic nut is repeatedly used to apply axial thrust to the outer sleeve 1. After the hydraulic nut is pressure-maintained, the hydraulic nut and the hydraulic pump connector are removed, and the oil inlet 1h1 of the outer sleeve 1 and the oil inlet of the shaft SH (located on the end face of one axial end of the shaft SH) are sealed with caps to prevent foreign matter from entering the interior of the bearing BE.

[0083] Finally, if Figure 2E and Figure 2F As shown, the locking nut 4 is installed at the end of the shaft SH, so that at least 80% of the area of ​​the end face of the locking nut 4 abuts against the end face of the outer sleeve 1, and finally the locking nut 4 is locked with the locking bolt 5, so that the locking nut 4 is relatively fixed to the shaft SH, thereby cooperating with the shaft shoulder to axially limit the assembly composed of the outer sleeve 1, the inner sleeve 2, the support ring 3 and the bearing BE. In this way, the entire installation process is completed.

[0084] The shaft and bearing assembly according to the present application can be obtained through the above installation method.

[0085] (Structure of shaft and bearing assembly according to the present application)

[0086] like Figure 2E and Figure 2F As shown, the shaft and bearing assembly according to the present application includes a shaft SH, a bearing BE and an installation and disassembly assembly assembled together. The outer sleeve 1, the inner sleeve 2 and the support ring 3 are at least partially located between the shaft SH and the bearing BE, and the locking nut 4 and the shaft shoulder of the shaft SH are used to limit the axial position of the assembly composed of the outer sleeve 1, the inner sleeve 2, the support ring 3 and the bearing BE.

[0087] Furthermore, the shaft SH is formed with a shaft oil supply passage op, the oil inlet of the shaft oil supply passage op is located on the end face of one axial end of the shaft SH, and the oil outlet is located on the outer peripheral surface of the shaft SH opposite to the second cylindrical surface 2s1 of the inner sleeve 2, so that during the disassembly process, oil pressure can be provided and an oil film can be formed between the outer peripheral surface of the shaft SH and the second cylindrical surface 2s1 of the inner sleeve 2, thereby facilitating the relative movement of the inner sleeve 2 and the shaft SH along the axial direction A, and further facilitating the disassembly of the inner sleeve.

[0088] The following will be combined Figure 3A , Figure 3B , Figure 4A and Figure 4B The following describes a method for removing the bearing BE from the shaft SH using the mounting and dismounting kit.

[0089] (Disassembly method)

[0090] In the following disassembly method, the shaft and bearing assembly installed by the above-mentioned installation method is taken as an example to illustrate the disassembly method using the installation and disassembly assembly.

[0091] In one disassembly method, Figure 3A As shown, first, remove the locking bolt 5 and the cap of the outer sleeve 1 and the shaft SH. Then, rotate the locking nut 4 from the shaft end thread in the direction of releasing the threaded engagement, so that a certain distance is maintained between the end face of the locking nut 4 and the end face of the outer sleeve 1, which is used as a disassembly space for the components composed of the outer sleeve 1 and the bearing BE.

[0092] Furthermore, a hydraulic pump connector is installed at the oil inlet 1h1 of the outer sleeve 1, and hydraulic oil is pumped into the outer sleeve 1 to provide oil pressure and form an oil film between the first conical surface 1s2 of the outer sleeve 1 and the second conical surface 2s2 of the inner sleeve 2. If the force generated by the hydraulic oil is not enough to disassemble the outer sleeve 1, as shown in FIG. Figure 3A As shown, align the second disassembly hole 4h2 of the axial locking nut 4 with the first disassembly hole 1h3 of the outer sleeve 1, and screw the screw rod TR through the second disassembly hole 4h2 of the locking nut 4 and screw it into the first disassembly hole 1h3 of the outer sleeve 1, so that the screw rod TR passes through the second disassembly hole 4h2 without threading, and then engages with the first disassembly hole 1h3 by thread. Then screw the nut into the free end of the screw rod TR. Use a torque wrench or other tool to act on the nut at the free end of the screw rod TR, and by turning the nut, the screw rod TR drives the outer sleeve 1, so that the outer sleeve 1 is disengaged from the inner sleeve 2. After that, remove the hydraulic pump connector, nut, screw rod TR and locking nut 4 in turn, and then remove the outer sleeve 1, bearing BE, bearing seat SE and end cover CO to form an assembly.

[0093] Further, if the inner sleeve 2 and the support ring 3 cannot be directly disassembled by hand, such as Figure 3B As shown, the locking nut 4 is reinstalled on the shaft end, and the second disassembly hole 4h2 of the locking nut 4 is aligned with the third disassembly hole 3h2 of the support ring 3. The screw rod TR is screwed into the third disassembly hole 3h2 of the support ring 3 through the second disassembly hole 4h2 of the locking nut 4, so that the screw rod TR passes through the second disassembly hole 4h2 without threading, and then engages with the third disassembly hole 3h2 by threading. Then the nut is screwed into the free end of the screw rod TR. After that, the hydraulic pump connector is installed at the oil inlet of the shaft oil supply passage op, and hydraulic oil is pumped to the shaft SH. The hydraulic oil can protect the shaft SH from being damaged when the inner sleeve 2 is disassembled, and the disassembly process is easier. Use tools such as torque wrenches to act on the nut at the end of the screw rod TR, and by turning the nut, the screw rod TR drives the inner sleeve 2, and the inner sleeve 2 and the support ring 3 are removed for a distance, and the hydraulic pump connector, nut, screw rod TR, and locking nut 4 are removed in sequence. Finally, the inner sleeve 2 and the support ring 3 can be removed from the shaft SH by hand. In this way, the entire disassembly process is completed.

[0094] In another alternative disassembly method, such as Figure 4A and Figure 4B As shown, during the disassembly process, the disassembly plate can also be used to replace the locking nut 4. If the disassembly load applied by the nut is not large enough, a jack can also be installed between the disassembly plate and the shaft end to disengage the bearing BE and the outer sleeve 1 from the conical surface of the inner sleeve 2.

[0095] The present application is not limited to the above embodiments, and those skilled in the art can make various modifications to the above embodiments of the present application under the guidance of the present application without departing from the scope of the present application. In addition, the following description is also made.

[0096] i. It can be understood that the installation and disassembly assembly according to the present application can be used for installation and disassembly between different types of bearings and shafts. When the installation and disassembly assembly according to the present application is used, the installation and disassembly process is simple and easy to implement, and the bearing will not be damaged during the installation and disassembly process.

[0097] ii. It is understood that although the first mounting surface of the outer sleeve 1, the second mounting surface of the inner sleeve 2, and the third mounting surface of the support ring 3 are all cylindrical surfaces in the above specific embodiments, the present application is not limited thereto. The specific shapes of the first mounting surface, the second mounting surface, and the third mounting surface can be set accordingly as needed.

[0098] iii. It can be understood that, since there is only one pair of relatively sliding surfaces (first conical surface 1s2 and second conical surface 2s2) during the installation and disassembly process using the installation and disassembly assembly according to the present application, no damage will be caused to the bearing BE and the shaft SH. Moreover, by adjusting the relative position relationship between the support ring 3 and the inner sleeve 2, the sliding distance of the outer sleeve 1 on the inner sleeve 2 can be pre-defined, so it can be pre-set for easy installation. Furthermore, by providing corresponding disassembly holes on the outer sleeve 1, the support ring 3 and the locking nut 4, the disassembly process can be conveniently realized by using the screw nut mechanism passing through the corresponding disassembly holes. Such a disassembly process is very convenient and quick, and will not cause any damage to the bearing BE and the shaft SH.

[0099] iv. It can be understood that the small diameter portion 32 of the support ring 3 can be omitted, that is, the support ring 3 only needs to limit the axial position of the bearing BE, and does not have to support the bearing BE from the radial inside.

Claims

1. A mounting and dismounting assembly for mounting a bearing (BE) on a shaft (SH) and dismounting the bearing (BE) from the shaft (SH), the mounting and dismounting assembly comprising: An outer sleeve (1), wherein the outer circumferential surface of the outer sleeve (1) is formed with a first mounting surface (1s1) for mounting the bearing (BE), and the inner circumferential surface of the outer sleeve (1) is formed with a first conical surface (1s2), wherein the first conical surface (1s2) extends radially outward and extends along the axial direction (A) of the mounting and dismounting assembly to one axial end of the outer sleeve (1); An inner sleeve (2), wherein the inner circumferential surface of the inner sleeve (2) is formed with a second mounting surface (2s1) for mounting on the shaft, and the outer circumferential surface of the inner sleeve (2) is formed with a threaded portion (21) and a second conical surface (2s2), wherein the threaded portion (21) is located on one axial end side of the second conical surface (2s2), and the second conical surface (2s2) extends radially inward from the threaded portion (21) and extends along the axial direction (A) to the other axial end of the inner sleeve (2), and when the second conical surface (2s2) is located radially inward of the first conical surface (1s2) and contacts the first conical surface (1s2), the inner sleeve (2) and the outer sleeve (1) are capable of relative movement in the axial direction (A); as well as A support ring (3) is threadedly engaged with the threaded portion (21), and the support ring (3) and the inner sleeve (2) are capable of relative movement in the axial direction (A) while maintaining the threaded engagement.

2. The installation and removal assembly according to claim 1, characterized in that: The mounting and disassembly assembly further comprises a locking nut (4) which is used for threaded engagement with the shaft (SH) to limit the axial position of the outer sleeve (1) relative to the shaft (SH) at the other axial end of the outer sleeve (1).

3. The installation and removal assembly according to claim 2, characterized in that: The installation and removal assembly also includes a locking bolt (5), The inner circumferential surface of the locking nut (4) is formed with an annular groove (4c) extending along the circumferential direction of the mounting and disassembly assembly. When the mounting and disassembly assembly is mounted on the shaft (SH), the locking nut (4) abuts against the outer sleeve (1). The locking nut (4) is formed with a mounting hole (4h1) extending along the axial direction (A), the mounting hole (4h1) extending through the annular groove (4c), and the locking bolt (5) is installed in the mounting hole (4h1) to lock the axial position of the locking nut (4) relative to the shaft (SH).

4. The installation and removal assembly according to any one of claims 1 to 3, characterized in that: The outer sleeve (1) is formed with a first step structure, the bottom surface of the first step structure is the first mounting surface (1s1), and the first step structure and the support ring (3) are used to define the axial position of the bearing (BE).

5. The installation and removal assembly according to claim 4, characterized in that: The support ring (3) is formed with a second step structure, and the bottom surface of the second step structure is a third mounting surface (3s) for supporting the bearing (BE).

6. The installation and removal assembly according to any one of claims 1 to 3, characterized in that: The outer sleeve (1) is provided with an inner oil groove on the first conical surface (1s2), the inner oil groove being open radially inward, and an oil supply passage (1p) communicating with the inner oil groove is also formed inside the outer sleeve (1).

7. The installation and removal assembly according to claim 6, characterized in that: The inner oil groove includes a circumferential oil groove (1c2) and a plurality of axial oil grooves (1c1), wherein the plurality of axial oil grooves (1c1) are arranged at intervals in the circumferential direction of the mounting and disassembly assembly, each of the axial oil grooves (1c1) extends along the axial direction (A), and the circumferential oil groove (1c2) extends continuously along the circumference and is connected to each of the axial oil grooves (1c1).

8. The installation and removal assembly according to any one of claims 1 to 3, characterized in that: The inner sleeve (2) is formed with a plurality of grooves (2c) on the second mounting surface (2s1), and the plurality of grooves (2c) are arranged at intervals in the circumferential direction of the mounting and disassembly assembly, and each of the grooves (2c) is open toward the radial inside and extends along the axial direction (A).

9. The installation and removal assembly according to any one of claims 1 to 3, characterized in that: The support ring (3) is formed with a fixing hole (3h1) penetrating along the axial direction (A), and the fixing hole (3h1) faces an axial end surface of the inner sleeve (2). The mounting and disassembly assembly further comprises a fixing member (33), wherein the fixing member (33) passes through the fixing hole (3h1) and abuts against an axial end surface of the inner sleeve (2), so that the inner sleeve (2) and the support ring (3) are relatively fixed.

10. The installation and removal assembly according to claim 2 or 3, characterized in that: The outer sleeve (1) is formed with a first disassembly hole (1h3) extending along the axial direction (A), and the locking nut (4) is formed with a second disassembly hole (4h2) cooperating with the first disassembly hole (1h3), and the second disassembly hole (4h2) passes through the locking nut (4) along the axial direction (A), and the second disassembly hole (4h2) can be aligned with the first disassembly hole (1h3) by rotating the locking nut (4) relative to the shaft (SH).

11. The installation and removal assembly according to claim 10, characterized in that: The support ring (3) is formed with a third disassembly hole (3h2) extending along the axial direction (A), and the second disassembly hole (4h2) can be aligned with the third disassembly hole (3h2) by rotating the locking nut (4) relative to the shaft (SH).

12. A shaft and bearing assembly, comprising a shaft (SH), a bearing (BE) and a mounting and disassembly assembly according to any one of claims 1 to 11, wherein an outer sleeve (1), an inner sleeve (2) and a support ring (3) of the mounting and disassembly assembly are at least partially located between the shaft (SH) and the bearing (BE), and the bearing (BE) is mounted on the shaft (SH) and disassembled from the shaft via the mounting and disassembly assembly.

13. The shaft and bearing assembly of claim 12, wherein: A shaft oil supply passage (op) is formed inside the shaft (SH), and an oil outlet of the shaft oil supply passage (op) is arranged on the outer peripheral surface of the shaft (SH) and faces the second mounting surface (2s1) of the inner sleeve (2).

14. A shaft and bearing assembly according to claim 12 or 13, characterised in that The shaft (SH) is formed with a shaft shoulder, and the shaft shoulder abuts against the support ring (3), so that the shaft shoulder axially limits the installation and disassembly assembly.

15. A method for installing a bearing on a shaft using the installation and removal assembly according to any one of claims 1 to 11, comprising the following steps: The bearing (BE) is fixedly mounted on the first mounting surface (1s1) of the outer sleeve (1), so that the bearing (BE) abuts against the first step structure of the outer sleeve (1); Inserting the inner sleeve (2) into the outer sleeve (1) so that the second conical surface (2s2) contacts the first conical surface (1s2); Threading the support ring (3) and the inner sleeve (2), adjusting the threaded engagement length of the support ring (3) and the inner sleeve (2) so that a predetermined axial clearance exists between the bearing (BE) and the support ring axial limiting surface of the support ring (3), and then fixing the support ring (3) and the inner sleeve (2); Mounting the assembly consisting of the outer sleeve (1), the inner sleeve (2), the support ring (3) and the bearing (BE) on the shaft (SH), so that the support ring (3) abuts against the shoulder of the shaft (SH); The outer sleeve (1) is pushed so that the outer sleeve (1) and the bearing (BE) move relative to the inner sleeve (2) in the axial direction (A), and finally the bearing (BE) abuts against the support ring axial limiting surface of the support ring (3) along the axial direction (A).

16. The installation method according to claim 15, characterized in that: In the process of pushing the outer sleeve (1), hydraulic oil is supplied between the first conical surface (1s2) and the second conical surface (2s2) via the oil supply passage (1p) of the outer sleeve (1).

17. The installation method according to claim 15 or 16, characterized in that: After the bearing (BE) is finally brought into contact with the support ring axial limiting surface of the support ring (3) along the axial direction (A), the locking nut (4) of the mounting and disassembly assembly is mounted on the shaft (SH) so that the locking nut (4) is brought into contact with the outer sleeve (1).

18. A method for removing a bearing from a shaft using the mounting and disassembly assembly according to claim 6 or 7, comprising the following steps: While hydraulic oil is supplied to the oil supply passage (1p) of the outer sleeve (1), the outer sleeve (1) is separated from the inner sleeve (2) and the outer sleeve (1) is removed from the shaft.

19. The disassembly method according to claim 18, characterized in that: During the process of removing the inner sleeve (2) from the shaft (SH), hydraulic oil is supplied between the shaft (SH) and the inner sleeve (2) through the shaft oil supply passage (op) of the shaft (SH).

20. A method for removing a bearing from a shaft using the mounting and dismounting assembly according to any one of claims 1 to 11, comprising the following steps: The outer sleeve (1) and the bearing (BE) are removed from the shaft (SH) by using a screw (TR) that passes through a locking nut (4) fixed to the shaft (SH) or a removal plate abutting against the shaft (SH) and is screwed into a first removal hole (1h3) of the outer sleeve (1); and Then, the inner sleeve (2) is removed from the shaft (SH) by means of a screw (TR) which passes through the locking nut (4) or the removal plate and is screwed into the third removal hole (3h2) of the support ring (3).

21. The disassembly method according to claim 20, characterized in that: During the process of removing the inner sleeve (2) from the shaft (SH), hydraulic oil is supplied between the shaft (SH) and the inner sleeve (2) through the shaft oil supply passage (op) of the shaft (SH).

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