Ring assembly method and manufacturing method

Abstract

In the process (S1), the front end side stopper ring (5) is provided to the small diameter portion (24) of the ring temporary holding jig (20). In the process (S2), the ring temporary holding jig (20) is temporarily held the front end side stopper ring (5) using the first ring press-in member (30). In the process (S3), the ring temporary holding jig (20) is attached to the shaft (2). In the process (S4), the front end side stopper ring (5) is transferred from the large diameter portion (26) of the ring temporary holding jig (20) to the first outer peripheral surface (2a) of the shaft (2) using the second ring press-in member (40) having a size (40D) shorter than the size (30D) of the first ring press-in member (30). In the process (S5), the front end side stopper ring (5) is assembled to the front end side ring groove (2d) by sliding on the first outer peripheral surface (2a) of the shaft (2) using the second ring press-in member (40).

Description

Technical Field

[0001] This invention relates to a method for assembling and manufacturing rings. Background Technology

[0002] Patent Document 1 discloses a method for installing a sealing ring in a groove formed on the outer circumferential surface of a shaft. Specifically, a ring mounting fixture having a tapered outer circumferential surface is mounted to the front end of the shaft, and the sealing ring slides on the tapered outer circumferential surface, thereby gradually expanding and deforming the sealing ring. The sealing ring, in its expanded and deformed state, moves on the outer circumferential surface of the shaft, and shortly after, when the sealing ring reaches the groove, it shrinks and deforms to be installed in the groove.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2015-182183 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, since the fixture that makes the sealing ring slide on the tapered outer circumferential surface is long, the sealing ring cannot be assembled into the groove of the shaft if sufficient working space is not guaranteed when using the fixture.

[0008] The object of this invention is to provide a technique for assembling rings into ring grooves of cylindrical components even when there is insufficient working space.

[0009] Technical solutions for solving the problem

[0010] According to a first aspect of the present invention, a ring assembly method is provided, wherein a ring is assembled in a ring groove formed on the outer circumferential surface of a cylindrical component. The ring assembly method includes the following steps: placing the ring in the small-diameter portion of a ring temporary holding clamp that sequentially includes a small-diameter portion, a tapered portion, and a large-diameter portion, wherein the outer diameter of the small-diameter portion is smaller than the outer diameter of the large-diameter portion; the outer circumferential surface of the tapered portion is formed in such a way that it connects the outer circumferential surface of the small-diameter portion and the outer circumferential surface of the large-diameter portion; the outer diameter of the large-diameter portion is greater than the outer diameter of the cylindrical component; and using a first ring pressing member, moving the ring from the small-diameter portion through the tapered portion to the large-diameter portion, thereby... The ring is temporarily held in a ring holding fixture. A first ring pressing member is cylindrical, with its front end capable of radial elastic displacement and a first length in the axial direction. The ring holding fixture is mounted on the cylindrical component. A second ring pressing member is used to transfer the ring from the large-diameter portion of the ring holding fixture to the outer circumferential surface of the cylindrical component. The second ring pressing member is cylindrical and has a second length in the axial direction shorter than the first length. The second ring pressing member is used to slide the ring onto the outer circumferential surface of the cylindrical component and assemble it into the ring groove. According to this method, even without sufficient working space, a ring can be assembled into the ring groove of the cylindrical component.

[0011] Preferably, the first ring press-in component has: a cylindrical portion; and a plurality of elastic sheets extending from the cylindrical portion. According to the above method, the first ring press-in component can be implemented with a simple structure.

[0012] Preferably, when the ring is moved relative to the temporary ring holding clamp in order to temporarily hold the ring in place, a ring movement limiting member having an outer diameter larger than the outer diameter of the large-diameter portion is abutted against the large-diameter portion of the temporary ring holding clamp. According to the above method, when the ring is moved relative to the temporary ring holding clamp in order to temporarily hold the ring in place, the ring will not cross the large-diameter portion.

[0013] Preferably, the temporary ring retaining clamp includes a temporary retaining insertion portion. When the temporary ring retaining clamp is installed onto the cylindrical component, the temporary retaining portion is inserted into the internal space of the cylindrical component. A temporary retaining side locking hole is formed on the outer peripheral surface of the temporary retaining insertion portion. The cylindrical component has a radially penetrating cylindrical component side locking hole. When the temporary ring retaining clamp for temporarily retaining the ring is installed onto the cylindrical component, the temporary retaining insertion portion of the temporary ring retaining clamp is inserted into the internal space of the cylindrical component, and the cylindrical component side locking hole and the temporary retaining side locking hole are aligned with each other. A locking pin is inserted into the cylindrical component side locking hole and the temporary retaining side locking hole. According to the above method, the temporary ring retaining clamp for temporarily retaining the ring can be reliably installed onto the cylindrical component.

[0014] Preferably, the ring temporary retaining clamp has a permanent magnet that magnetically engages with the locking pin inserted into the temporary retaining side locking hole. According to the above method, the locking pin can be maintained in the temporary retaining side locking hole with a simple structure, and the locking pin can be easily pulled out of the temporary retaining side locking hole using a magnet stronger than the permanent magnet.

[0015] Preferably, the second ring pressing component includes: a cylindrical portion; a cover portion that closes the end of the cylindrical portion; and a bolt, the bolt including: a bolt body having at least a threaded portion; and a head, wherein a bolt through hole is formed in the cover portion, the bolt body of the bolt is inserted into the bolt through hole, and a threaded hole corresponding to the bolt through hole is formed in the ring temporary holding fixture. When the ring is slidably assembled into the ring groove on the outer circumferential surface of the cylindrical component, the ring temporary holding fixture is introduced into the second ring pressing component by fastening the threaded portion of the bolt into the threaded hole of the ring temporary holding fixture. According to the above method, the ring can be slidably moved on the outer circumferential surface of the cylindrical component with a relatively strong force.

[0016] According to a second aspect of the present invention, a manufacturing method is provided for a shaft assembly comprising: a cylindrical component having an annular groove formed on its outer circumferential surface; and a ring assembled in the annular groove. The manufacturing method includes the following steps: placing the ring in the small-diameter portion of a ring temporary holding clamp that sequentially includes a small-diameter portion, a tapered portion, and a large-diameter portion, wherein the outer diameter of the small-diameter portion is smaller than the outer diameter of the large-diameter portion; the outer circumferential surface of the tapered portion is formed such that it connects the outer circumferential surface of the small-diameter portion and the outer circumferential surface of the large-diameter portion; the outer diameter of the large-diameter portion is greater than or equal to the outer diameter of the cylindrical component; and using a first ring pressing member to move the ring from the small-diameter portion through the tapered portion. The ring is moved to the large-diameter portion, thereby temporarily holding the ring in the ring temporary holding fixture. The first ring pressing member is cylindrical, with its front end capable of radial elastic displacement and having a first length in the axial direction. The ring temporary holding fixture is mounted on the cylindrical component. Using the second ring pressing member, the large-diameter portion of the ring temporary holding fixture is transferred to the outer circumferential surface of the cylindrical component. The second ring pressing member is cylindrical and has a second length in the axial direction shorter than the first length. Using the second ring pressing member, the ring is slidably assembled into the ring groove on the outer circumferential surface of the cylindrical component. According to the above method, even without sufficient working space, the ring can be assembled into the ring groove of the cylindrical component.

[0017] Preferably, the first ring press-in component has: a cylindrical portion; and a plurality of elastic sheets extending from the cylindrical portion. According to the above method, the first ring press-in component can be implemented with a simple structure.

[0018] Preferably, when the ring is moved relative to the temporary ring holding clamp in order to temporarily hold the ring in place, a ring movement limiting member having an outer diameter larger than the outer diameter of the large-diameter portion is abutted against the large-diameter portion of the temporary ring holding clamp. According to the above method, when the ring is moved relative to the temporary ring holding clamp in order to temporarily hold the ring in place, the ring will not cross the large-diameter portion.

[0019] Preferably, the temporary ring retaining clamp includes a temporary retaining insertion portion, which is inserted into the internal space of the cylindrical component when the temporary ring retaining clamp is installed onto the cylindrical component. A temporary retaining side locking hole is formed on the outer peripheral surface of the temporary retaining insertion portion. The cylindrical component has a radially penetrating cylindrical component side locking hole. When the temporary ring retaining clamp for temporarily retaining the ring is installed onto the cylindrical component, the temporary retaining insertion portion of the temporary ring retaining clamp is inserted into the internal space of the cylindrical component, and the cylindrical component side locking hole and the temporary retaining side locking hole are aligned with each other. A locking pin is inserted into the cylindrical component side locking hole and the temporary retaining side locking hole. According to the above method, the temporary ring retaining clamp for temporarily retaining the ring can be reliably installed onto the cylindrical component.

[0020] Preferably, the ring temporary retaining clamp has a permanent magnet that magnetically engages with the locking pin inserted into the temporary retaining side locking hole. According to the above method, the locking pin can be maintained in the temporary retaining side locking hole with a simple structure, and the locking pin can be easily pulled out of the temporary retaining side locking hole using a magnet stronger than the permanent magnet.

[0021] Preferably, the second ring pressing component includes: a cylindrical portion; a cover portion that closes the end of the cylindrical portion; and a bolt, the bolt including: a bolt body having at least a threaded portion; and a head, wherein a bolt through hole is formed in the cover portion, the bolt body of the bolt is inserted into the bolt through hole, and a threaded hole corresponding to the bolt through hole is formed in the ring temporary holding fixture. When the ring is slidably assembled into the ring groove on the outer circumferential surface of the cylindrical component, the ring temporary holding fixture is introduced into the second ring pressing component by fastening the threaded portion of the bolt into the threaded hole of the ring temporary holding fixture. According to the above method, the ring can be slidably moved on the outer circumferential surface of the cylindrical component with a relatively strong force.

[0022] Invention Effects

[0023] According to the present invention, even without sufficient working space, the ring can be assembled into the annular groove of the cylindrical component. Attached Figure Description

[0024] Figure 1 This is a 3D view of the shaft assembly.

[0025] Figure 2 This is a sectional view of the shaft assembly.

[0026] Figure 3 This is a cross-sectional view of the front-side stop ring of the shaft assembly before assembly.

[0027] Figure 4 This is a 3D view of the front-side retaining ring.

[0028] Figure 5 This is a flowchart of the ring assembly method.

[0029] Figure 6 It is a perspective view of the ring temporary holding clamp and the ring movement limiting component.

[0030] Figure 7 This is a cross-sectional view showing the ring temporarily holding clamp mounted on the ring movement limiting component.

[0031] Figure 8 This is a cross-sectional view showing a state where a front-side stop ring is provided on the small diameter portion of the ring temporary holding clamp.

[0032] Figure 9 This is a 3D view of the first ring pressed-in component.

[0033] Figure 10 It is a cross-sectional view showing the state in which the front-side stop ring is temporarily held in the ring temporary holding fixture.

[0034] Figure 11 This is a three-dimensional view of a temporary retaining fixture with a front-side stop ring temporarily holding the ring.

[0035] Figure 12 This is a perspective view showing the state of a temporary retaining fixture with a front-side stop ring installed behind the shaft.

[0036] Figure 13 This is a cross-sectional view showing the state of a ring holding fixture with a front-side stop ring installed behind the shaft.

[0037] Figure 14 This is a 3D view of the second ring press-in component.

[0038] Figure 15 This is a cross-sectional view showing the state in which the second ring pressing component is pressed against the stop ring temporarily held at the front end of the ring temporary holding clamp.

[0039] Figure 16 This is a cross-sectional view showing the state after the front-side stop ring is moved backward using the second ring pressing component.

[0040] Figure 17 This is a cross-sectional view showing the state after the front-side stop ring is assembled into the ring groove using the second ring press-in component. Detailed Implementation

[0041] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0042] Figure 1 and Figure 2 Shaft assembly 1 is shown in the image. (As shown...) Figure 1 and Figure 2 As shown, the shaft assembly 1 includes a shaft 2 (cylindrical component), a tapered roller bearing 3, an inner housing 4, a front-end side retaining ring 5, a ball bearing 6, a preload mechanism 7, and a rear-end side retaining ring 8. In this embodiment, the shaft assembly 1 is composed of at least the shaft 2 and the front-end side retaining ring 5. Moreover, as... Figure 2 As shown, the shaft assembly 1 is housed in a cylindrical frame 10.

[0043] Shaft 2 is a specific example of a hollow cylindrical component, typically made of stainless steel. Shaft 2 includes a first outer peripheral surface 2a on which a tapered roller bearing 3 is disposed, a second outer peripheral surface 2b on which a ball bearing 6 is disposed, and a third outer peripheral surface 2c disposed between the first outer peripheral surface 2a and the second outer peripheral surface 2b. In this embodiment, the outer diameters of the first outer peripheral surface 2a and the second outer peripheral surface 2b are equal, and the outer diameter of the third outer peripheral surface 2c is smaller than the outer diameters of the first outer peripheral surface 2a and the second outer peripheral surface 2b.

[0044] A front end side annular groove 2d (annular groove) is formed on the first outer peripheral surface 2a of the shaft 2. Similarly, a rear end side annular groove 2e is formed on the second outer peripheral surface 2b of the shaft 2.

[0045] Here, refer to Figure 2 The axial direction of shaft 2 includes "front" and "rear". "Front" is defined as the direction from the rear annular groove 2e to the front annular groove 2d. "Rear" is the direction from the front annular groove 2d to the rear annular groove 2e. Shaft 2 has a front end portion 11 and a rear end portion 12.

[0046] return Figure 1 Multiple shaft-side locking holes 2f (cylindrical component-side locking holes) are formed at the front end 11 of shaft 2. Each shaft-side locking hole 2f is a through hole that penetrates the front end 11 radially.

[0047] Figure 2 The shaft 2 shown is, for example, part of a high-speed rotating propeller, subjected to a rearward axial load. Therefore, the tapered roller bearing 3 is positioned to withstand this axial load. The tapered roller bearing 3 includes an inner ring 3a, an outer ring 3b, and a plurality of tapered rollers (not shown). The outer ring 3b is press-fitted to the frame 10.

[0048] The inner housing 4, for example, is made of stainless steel and is located radially inside the tapered roller bearing 3. The inner housing 4 includes a cylindrical outer housing body 4a disposed between the inner ring 3a of the tapered roller bearing 3 and the first outer peripheral surface 2a of the shaft 2, and an annular flange 4b ​​projecting radially outward from the front end of the outer housing body 4a. The flange 4b ​​is axially opposed to the inner ring 3a of the tapered roller bearing 3. An annular receiving recess 4d is formed on the radially inner side of the front surface 4c of the flange 4b.

[0049] Figure 3 This is a cross-sectional view showing the front-side stop ring 5 before it is assembled into the front-side annular groove 2d of shaft 2.

[0050] Figure 4 This is a three-dimensional view of the front-side stop ring 5. (Example) Figure 4 As shown, the front-side stop ring 5 is typically made of stainless steel and is a C-shaped ring. The front-side stop ring 5 has a roughly rectangular cross-section.

[0051] return Figure 2 Ball bearings 6 are mainly bearings that bear radial loads.

[0052] The preload mechanism 7 is a mechanism that generates the rearward preload required for the inner ring 3a of the tapered roller bearing 3, and includes, for example, a disc spring 7a.

[0053] The rear-end stop ring 8 is made of stainless steel, for example, and is assembled into the rear-end annular groove 2e of the shaft 2. The rear-end stop ring 8 causes the preload generated by the preload mechanism 7 to act on the shaft 2.

[0054] In this structure, the outer ring 3b of the tapered roller bearing 3 and the ball bearing 6 are axially fixed to each other via the frame 10. The preload generated by the preload mechanism 7 acts sequentially on the inner ring 3a via the rear end retaining ring 8, the shaft 2, the front end retaining ring 5, and the inner housing 4. As a result, the preload generated by the preload mechanism 7 acts between the inner ring 3a and the outer ring 3b of the tapered roller bearing 3, and the inner ring 3a and the outer ring 3b press against each other normally in the axial direction.

[0055] like Figure 3 As shown, before assembling the front-side stop ring 5, the shaft 2 moves rearward relative to the tapered roller bearing 3 by the preload of the preload mechanism 7. As a result, the front-side annular groove 2d of the shaft 2 is located radially inside the outer shell body 4a of the inner shell 4.

[0056] Next, refer to Figure 5 The following figures illustrate the ring assembly method for assembling the front-side stop ring 5 relative to the front-side annular groove 2d formed on the first outer peripheral surface 2a of shaft 2. In other words, referring to... Figure 5 The following diagrams will illustrate the manufacturing method of shaft assembly 1.

[0057] However, in the description of the initial ring assembly method and the manufacturing method of shaft assembly 1, for example, Figure 3 As shown, it is assumed that all components except the front-side stop ring 5 have been assembled.

[0058] like Figure 5As shown, the ring assembly method and the manufacturing method of the shaft assembly 1 sequentially include a ring setting process (S1), a temporary holding process (S2), an installation process (S3), a ring transfer process (S4), and a ring movement process (S5).

[0059] <Ring setting process: S1>

[0060] exist Figure 6 and Figure 7 The image shows a ring temporary holding clamp 20 used in the ring setting process and a ring movement limiting member 21 used in the temporary holding process. Figure 8 The image shows the state in which the ring movement limiting component 21 is equipped with the ring temporary holding clamp 20.

[0061] like Figure 6 and Figure 7 As shown, the ring temporary retaining clamp 20 is made of stainless steel, for example, and includes a retaining body 22 and a temporary retaining insertion part 23.

[0062] like Figure 7 As shown, the retaining body 22 sequentially includes a small-diameter portion 24, a tapered portion 25, and a large-diameter portion 26. The outer peripheral surface 24a of the small-diameter portion 24 extends parallel to the axial direction. The outer peripheral surface 25a of the tapered portion 25 is inclined relative to the axial direction. The outer peripheral surface 25a of the tapered portion 25 is inclined in a manner that it expands towards the outer peripheral surface 26a of the large-diameter portion 26. The outer peripheral surface 26a of the large-diameter portion 26 extends parallel to the axial direction. The outer diameter of the small-diameter portion 24 is smaller than the outer diameter of the large-diameter portion 26. The outer diameter of the small-diameter portion 24 is smaller than the inner diameter of the front-end side stop ring 5 in the unloaded state. The outer diameter of the large-diameter portion 26 is smaller than the inner diameter of the front-end side stop ring 5 in the unloaded state. Figure 2 The outer diameter of the first outer circumferential surface 2a of the shaft 2 shown is equal to, or slightly larger than, the outer diameter of the first outer circumferential surface 2a of the shaft 2. Return Figure 7 The outer peripheral surface 25a of the tapered portion 25 is inclined relative to the axial direction in such a way that it connects the outer peripheral surface 24a of the small-diameter portion 24 and the outer peripheral surface 26a of the large-diameter portion 26. Figure 6 A threaded hole 27 is formed on the front surface 22a of the retainer body 22.

[0063] The temporary holding insertion part 23 is configured to be able to be inserted into Figure 2 Inside the shaft 2 shown, the outer diameter of the temporary holding insertion part 23 is smaller than the outer diameter of the large diameter part 26. A plurality of temporary holding side locking holes 28 are formed on the outer peripheral surface 23a of the temporary holding insertion part 23. Each temporary holding side locking hole 28 extends radially. A permanent magnet 29 is housed in each temporary holding side locking hole 28.

[0064] The ring movement limiting member 21 is, for example, a stainless steel ring with a rectangular cross-section, configured to allow the temporary holding insertion portion 23 of the ring temporary holding clamp 20 to be inserted. The ring movement limiting member 21 has an inner circumferential surface 21a, an outer circumferential surface 21b, and two end faces 21c. Furthermore, the inner diameter of the inner circumferential surface 21a is substantially equal to the outer diameter of the temporary holding insertion portion 23 of the ring temporary holding clamp 20. The outer diameter of the outer circumferential surface 21b is larger than the outer diameter of the large diameter portion 26 of the holding body 22 of the ring temporary holding clamp 20. Therefore, when the temporary holding insertion portion 23 of the ring temporary holding clamp 20 is inserted into the ring movement limiting member 21, the large diameter portion 26 of the holding body 22 of the ring temporary holding clamp 20 rests on one end face 21c of the ring movement limiting member 21. As a result, the large diameter portion 26 of the holding body 22 of the ring temporary holding clamp 20 is axially abutted against the ring movement limiting member 21. In addition, when seated, the end face 21c of the seated large diameter portion 26 is exposed on the radial outer side of the large diameter portion 26.

[0065] In this state, such as Figure 8 As shown, a front-end stop ring 5 is provided radially outside the small-diameter portion 24 of the retainer body 22 of the ring temporary retainer 20. At this time, the front-end stop ring 5 falls down and sits on the outer peripheral surface 25a of the cone portion 25, or it stays on the outer peripheral surface 24a of the small-diameter portion 24 by tilting.

[0066] <Temporary holding process: S2>

[0067] Next, the front-side stop ring 5 is temporarily held in the ring temporary holding fixture 20 by moving the small-diameter portion 24 through the tapered portion 25 to the large-diameter portion 26. In this temporary holding process, the ring is held in place using... Figure 9 The first ring is pressed into component 30 as shown.

[0068] like Figure 9 As shown, the first ring press-in member 30 is made of resin, for example, and includes a cylindrical portion 31 and a plurality of elastic sheets 32 extending axially from the cylindrical portion 31. Each elastic sheet 32 ​​is a cantilever beam that is elastically deformable in the radial direction. The first ring press-in member 30 has an axial dimension 30D.

[0069] Moreover, such as Figure 10 As shown, the front end 32a of each elastic piece 32 is pressed against the front end stop ring 5, and the front end stop ring 5 is pushed toward the ring movement limiting member 21. As a result, the front end stop ring 5 slides down the outer peripheral surface 25a of the tapered portion 25 while undergoing diameter expansion deformation, soon reaching the outer peripheral surface 26a of the large diameter portion 26, and then the end face 21c of the ring movement limiting member 21. The front end stop ring 5 is pressed against the outer peripheral surface 26a of the large diameter portion 26 by the elastic restoring force of the spring, therefore, as... Figure 11As shown, the front-side stop ring 5 is temporarily held in the large-diameter portion 26 of the holding body 22 of the ring temporary holding clamp 20. After the temporary holding ends, since the ring movement limiting member 21 is no longer used, the ring movement limiting member 21 is removed from the ring temporary holding clamp 20 and recycled.

[0070] <Installation Procedure: S3>

[0071] Next, as Figure 12 and Figure 13 As shown, a temporary retaining clamp 20 for temporarily holding the front-end stop ring 5 is mounted on the front end 11 of the shaft 2. Specifically, as... Figure 13 As shown, the temporary holding insertion portion 23 of the ring temporary holding clamp 20 is inserted into the internal space of the front end portion 11 of the shaft 2, so that the large-diameter portion 26 of the holding body 22 of the ring temporary holding clamp 20 abuts against the front end portion 11 of the shaft 2 in the axial direction. In this embodiment, the outer diameter of the outer peripheral surface 26a of the large-diameter portion 26 is set to be equal to the outer diameter of the front end portion 11 of the shaft 2. Therefore, through the above-mentioned abutment, the outer peripheral surface 26a of the large-diameter portion 26 and the first outer peripheral surface 2a of the shaft 2 become the same surface, and the front end side stop ring 5 can move from the outer peripheral surface 26a of the large-diameter portion 26 to the first outer peripheral surface 2a of the shaft 2.

[0072] In addition, at this time, it will be formed in Figure 7 The temporary retaining clamp 20 shown has multiple temporary retaining side locking holes 28 on the outer peripheral surface 23a of the temporary retaining insertion portion 23 and formed on the ring temporary retaining clamp 20. Figure 1 The multiple shaft-side locking holes 2f at the front end 11 of the shaft 2 shown are respectively aligned with each other, as follows: Figure 12 As shown, the locking pins 33 are inserted into the locking holes 2f on each shaft side and the corresponding temporary holding side locking holes 28. The inserted locking pins 33 and... Figure 7 The permanent magnets 29 shown are magnetically engaged, preventing the locking pins 33 from falling out of their corresponding shaft-side locking holes 2f. By simultaneously housing the locking pins 33 in the temporary holding side locking holes 28 corresponding to each shaft-side locking hole 2f, the ring temporary holding clamp 20 is prevented from being pulled out of the shaft 2.

[0073] <Circuit Transfer Process: S4>

[0074] Next, in Figure 13 In this process, the stop ring 5 on the front end of the temporary retaining clamp 20 is transferred to the first outer peripheral surface 2a of the shaft 2. During this transfer, the stop ring 5 is transferred to the first outer peripheral surface 2a of the shaft 2. Figure 14 and Figure 15 The second ring press-in component 40 is shown.

[0075] like Figure 14 As shown, the second ring press-in component 40 has an axial dimension 40D. The dimension 40D of the second ring press-in component 40 is larger than that of the second ring press-in component 40. Figure 9The dimension 30D of the first ring press-in component 30 shown is smaller. That is, the second ring press-in component 40 is shorter than the first ring press-in component 30. (Return) Figure 14 The second ring pressing component 40 includes a pressing component body 41 and a bolt 42.

[0076] like Figure 15 As shown, the main body 41 of the press-in component is made of stainless steel, for example, and includes a cylinder 43 and a cover 44 at the front end of the cylinder 43.

[0077] The inner diameter of the cylinder 43 is set to be slightly larger than the outer diameter of the front end portion 11 of the shaft 2. Additionally, the inner diameter of the cylinder 43 is set to be slightly larger than the outer diameter of the large diameter portion 26 of the ring temporary holding clamp 20. An annular flange 45 protruding radially outward and a housing pressing portion 46 protruding rearward from the radially outward end of the flange 45 are formed at the rear end of the cylinder 43. The inner diameter of the housing pressing portion 46 is set to be larger than the outer diameter of the front end side stop ring 5. Therefore, the front end side stop ring 5 can be received radially inward within the housing pressing portion 46. The axial dimension 46d of the housing pressing portion 46 is set to be larger than the axial dimension 5T of the front end side stop ring 5.

[0078] Bolt 42 includes bolt body 50 and head 51. Bolt body 50 includes threaded portion 52 and body portion 53.

[0079] A bolt through hole 54 is formed in the center of the cover 44, into which the bolt body 50 can be inserted for the bolt 42.

[0080] Then as Figure 15 As shown, the flange 45 of the second ring pressing member 40 is axially aligned with the front-end stop ring 5. In this state, by pressing the second ring pressing member 40 rearward, the front-end stop ring 5 is transferred from the outer peripheral surface 26a of the large-diameter portion 26 of the ring temporary holding clamp 20 to the first outer peripheral surface 2a of the shaft 2.

[0081] In addition, such as Figure 14 As shown, a plurality of holes 41a are formed on the outer peripheral surface of the press-in component body 41, into which an anti-rotation rod (not shown) can be inserted.

[0082] <Circular movement process: S5>

[0083] return Figure 15 If the second ring pressing component 40 is pressed further backward, the front-end side stop ring 5 slides backward and moves on the first outer peripheral surface 2a of the shaft 2. Then, soon, as... Figure 16 As shown, the housing pressing portion 46 of the second ring pressing member 40 abuts against the front surface 4c of the flange 4b ​​of the inner shell 4. At this time, since the tapered roller bearing 3 is fixed axially relative to the frame 10, the second ring pressing member 40 cannot be pressed further rearward.

[0084] In this state, the bolt 42 is rotated, tightening the threaded portion 52 of the bolt 42 into the threaded hole 27 of the retaining body 22 of the ring temporary retaining clamp 20. At this time, because the head 51 of the bolt 42 is larger than the bolt through hole 54, rearward movement is prohibited. Therefore, as the tightening proceeds, the shaft 2 is pulled forward via the ring temporary retaining clamp 20, as... Figure 17 As shown, it is further pulled into the internal space of the pressing component body 41 of the second ring pressing component 40.

[0085] Furthermore, when rotating bolt 42, it is possible to Figure 14 An anti-rotation bar is inserted into any one of the plurality of holes 41a shown. This easily prevents the pressing component body 41 from rotating together.

[0086] Then, as Figure 17 As shown, when the front end side annular groove 2d of shaft 2 moves forward relative to the second ring pressing component 40, it reaches the radial inner side of the front end side stop ring 5. The front end side stop ring 5 is assembled into the front end side annular groove 2d due to the diameter reduction deformation caused by the elastic restoring force of the spring.

[0087] After the above assembly is completed, the bolt 42 is pulled out from the threaded hole 27 of the ring temporary retaining clamp 20, and the second ring press-in component 40 is retrieved from the shaft 2. As a result, the shaft 2 moves rearward relative to the tapered roller bearing 3 by the preload of the preload mechanism 7, becoming... Figure 2 The state.

[0088] In addition, Figure 12 The multiple locking pins 33 shown are pulled out from their corresponding shaft-side locking holes 2f, retracting the ring temporary retaining clamp 20 from the shaft 2. Furthermore, when pulling out the multiple locking pins 33 from their corresponding shaft-side locking holes 2f, it is only necessary to use the permanent magnet 29 (see reference 29) that is magnetically engaged with each locking pin 33. Figure 7 A strong magnet is magnetically engaged with the locking pin 33. Thus, by pulling the magnet radially outward, the locking pin 33 can be easily pulled out of the axial locking hole 2f.

[0089] The preferred embodiments of the present invention have been described above, but the above embodiments have the following features.

[0090] For example, Figure 2 As shown, the ring assembly method for assembling the front-end side stop ring 5 (ring) into the front-end side ring groove 2d (ring groove) formed on the first outer peripheral surface 2a (outer peripheral surface) of the shaft 2 (cylindrical component) includes the following steps.

[0091] • Process (S1): such as Figure 8As shown, the front-end stop ring 5 is disposed on the small-diameter portion 24 of the ring temporary holding clamp 20, which includes a small-diameter portion 24, a tapered portion 25 and a large-diameter portion 26 in sequence. The outer diameter of the small-diameter portion 24 is smaller than the outer diameter of the large-diameter portion 26. The outer peripheral surface 25a of the tapered portion 25 is formed in such a way that it connects the outer peripheral surface 24a of the small-diameter portion 24 and the outer peripheral surface 26a of the large-diameter portion 26. The outer diameter of the large-diameter portion 26 is greater than or equal to the outer diameter of the shaft 2.

[0092] • Process (S2): such as Figure 9 and Figure 10 As shown, the first ring pressing member 30 is used to move the front end side stop ring 5 from the small diameter portion 24 to the large diameter portion 26 via the tapered portion 25, thereby temporarily holding the front end side stop ring 5 in the ring temporary holding clamp 20. The first ring pressing member 30 is cylindrical, with the front end portion 32a capable of elastic displacement in the radial direction and having a dimension 30D (first length) in the axial direction.

[0093] • Process (S3): such as Figure 12 and Figure 13 As shown, the temporary retaining clamp 20 for temporarily holding the front-side stop ring 5 is installed on the shaft 2.

[0094] • Process (S4): such as Figure 14 and Figure 15 As shown, the second ring pressing member 40 is used to transfer the front end side stop ring 5 from the large diameter portion 26 of the ring temporary holding clamp 20 to the first outer peripheral surface 2a of the shaft 2. The second ring pressing member 40 is cylindrical and has a dimension 40D (second length) that is shorter than dimension 30D in the axial direction.

[0095] • Process (S5): such as Figure 16 and Figure 17 As shown, the second ring pressing component 40 is used to make the front end side stop ring 5 slide on the first outer peripheral surface 2a of the shaft 2 and be assembled into the front end side ring groove 2d.

[0096] According to the above method, even without sufficient working space, the front-side stop ring 5 can be assembled into the front-side ring groove 2d of the shaft 2.

[0097] In addition, such as Figure 9 As shown, the first ring pressing member 30 has: a cylindrical portion 31; and a plurality of elastic sheets 32 extending from the cylindrical portion 31. According to the above method, the first ring pressing member 30 can be realized with a simple structure.

[0098] In addition, such as Figure 10As shown, when the front-side stop ring 5 is moved relative to the ring temporary holding clamp 20 to temporarily hold it in place, the ring movement limiting member 21, which has an outer diameter larger than the outer diameter of the large-diameter portion 26, is brought into contact with the large-diameter portion 26 of the ring temporary holding clamp 20. According to the above method, when the front-side stop ring 5 is moved relative to the ring temporary holding clamp 20 to temporarily hold it in place, the front-side stop ring 5 will not cross the large-diameter portion 26.

[0099] In addition, such as Figure 13 As shown, the ring temporary holding clamp 20 includes a temporary holding insertion part 23, which is inserted into the internal space of the shaft 2 when the ring temporary holding clamp 20 is installed on the shaft 2. Figure 7 As shown, a plurality of temporary holding side locking holes 28 are formed on the outer peripheral surface 23a of the temporary holding insertion part 23. Figure 1 As shown, shaft 2 has a radially penetrating shaft-side locking hole 2f (cylindrical component-side locking hole). For example... Figure 12 and Figure 13 As shown, when installing the temporary retaining clamp 20 of the temporary retaining front-side stop ring 5 onto the shaft 2, the temporary retaining insertion part 23 of the temporary retaining clamp 20 is inserted into the internal space of the shaft 2, and the plurality of shaft-side locking holes 2f and the plurality of temporary retaining side locking holes 28 are respectively aligned with each other. The plurality of locking pins 33 are then inserted into the plurality of shaft-side locking holes 2f and the plurality of temporary retaining side locking holes 28. According to the above method, the temporary retaining clamp 20 of the temporary retaining front-side stop ring 5 can be reliably installed onto the shaft 2.

[0100] In addition, such as Figure 7 As shown, instead of forming multiple temporary holding side locking holes 28 on the outer peripheral surface 23a of the temporary holding insertion portion 23, one temporary holding side locking hole 28 can also be formed on the outer peripheral surface 23a of the temporary holding insertion portion 23. The same applies to the axial locking hole 2f.

[0101] In addition, such as Figure 7 As shown, the ring temporary holding clamp 20 has a permanent magnet 29, which is magnetically engaged with a locking pin 33 inserted into each temporary holding side locking hole 28. According to the above method, the locking pin 33 can be maintained in the temporary holding side locking hole 28 with a simple structure, and the locking pin 33 can be easily pulled out of the temporary holding side locking hole 28 using a magnet stronger than the permanent magnet 29.

[0102] In addition, such as Figure 14 and Figure 15As shown, the second ring press-in component 40 includes: a cylindrical body 43; a cover 44 that closes the end of the cylindrical body 43; and a bolt 42. The bolt 42 includes: a bolt body 50 having at least a threaded portion 52; and a head 51. A bolt through-hole 54 is formed in the cover 44. The bolt body 50 of the bolt 42 is inserted into the bolt through-hole 54. Figure 16 As shown, the temporary ring retaining clamp 20 has a threaded hole 27 corresponding to the bolt through hole 54. When the front-end side stop ring 5 is slidably mounted on the first outer peripheral surface 2a of the shaft 2 and assembled into the front-end side ring groove 2d, the temporary ring retaining clamp 20 is introduced into the second ring pressing member 40 by tightening the threaded portion 52 of the bolt 42 into the threaded hole 27 of the temporary ring retaining clamp 20. According to the above method, the front-end side stop ring 5 can be slid on the first outer peripheral surface 2a of the shaft 2 with a relatively strong force.

[0103] This application claims priority based on Japanese Patent Application No. 2020-139784, filed on August 21, 2020, the entire disclosure of which is incorporated herein by reference.

[0104] Explanation of reference numerals in the attached figures

[0105] 1-axis assembly

[0106] 2-axis

[0107] 2a First outer peripheral surface

[0108] 2b Second outer periphery

[0109] 2c Third outer periphery

[0110] 2d front-end side annular groove

[0111] 2e Rear end side annular groove

[0112] 2f Shaft-side locking hole

[0113] 3 Tapered Roller Bearings

[0114] 3a Inner Circle

[0115] 3b Outer ring

[0116] 4. Inner shell

[0117] 4a Outer shell body

[0118] 4b flange

[0119] 4c front surface

[0120] 4d ring receiving recess

[0121] 5. Front-end side stop ring

[0122] 5T size

[0123] 6 ball bearings

[0124] 7. Preloading mechanism

[0125] 7a Disc Spring

[0126] 8. Rear end side stop ring

[0127] 10 Framework

[0128] 11. Front end

[0129] 12 Rear end

[0130] 20-ring temporary holding clamp

[0131] 21 Ring movement restriction components

[0132] 21a Inner circumferential surface

[0133] 21b outer periphery

[0134] 21c end face

[0135] 22 Retaining component body

[0136] 22a Front surface

[0137] 23 Temporarily retain the insertion part

[0138] 23a Outer peripheral surface

[0139] 24. Small diameter section

[0140] 24a Outer Peripheral Surface

[0141] 25 Conical section

[0142] 25a Outer Peripheral Surface

[0143] 26 Large diameter part

[0144] 26a Outer Peripheral Surface

[0145] 27 Threaded hole

[0146] 28 Temporary retaining side locking hole

[0147] 29 Permanent magnets

[0148] 30 First ring press-in component

[0149] 30D size

[0150] 31 Cylindrical section

[0151] 32 Elastic sheet

[0152] 32a Front end

[0153] 33 Locking pin

[0154] 40 Second ring press-in component

[0155] 40D size

[0156] 41 Press-in component body

[0157] 41a Hole

[0158] 42 bolts

[0159] 43. Cylinder

[0160] 44 cover

[0161] 45 flange

[0162] 46. ​​Housing pressing part

[0163] 46d size

[0164] 50 bolt body

[0165] 51 Head

[0166] 52 Threaded section

[0167] 53 Main body

[0168] 54 Bolt through holes

Claims

1. A ring assembly method, comprising assembling a ring into a ring groove, the ring groove being formed on the outer circumferential surface of a cylindrical component, the ring assembly method comprising the following steps: The ring is disposed on the small-diameter portion of a ring temporary holding clamp that sequentially includes a small-diameter portion, a tapered portion, and a large-diameter portion. The outer diameter of the small-diameter portion is smaller than the outer diameter of the large-diameter portion. The outer circumferential surface of the tapered portion is formed in such a way that it connects the outer circumferential surface of the small-diameter portion and the outer circumferential surface of the large-diameter portion. The outer diameter of the large-diameter portion is greater than or equal to the outer diameter of the cylindrical component. A first ring pressing component is used to move the ring from the small-diameter portion to the large-diameter portion via the tapered portion, thereby temporarily holding the ring in the ring temporary holding clamp. The first ring pressing component is cylindrical, with its front end capable of elastic displacement in the radial direction and having a first length in the axial direction. The temporary ring holding clamp is installed on the cylindrical component. A second ring press-in component is used to transfer the ring from the large-diameter portion of the ring temporary holding clamp to the outer circumferential surface of the cylindrical component. The second ring press-in component is cylindrical and has a second length in the axial direction that is shorter than the first length. Using the second ring press-in component, the ring is slidably assembled into the ring groove on the outer circumferential surface of the cylindrical component. The second ring press-in component includes: a cylindrical portion; a cover portion that closes the end of the cylindrical portion; and a bolt. The bolt includes: a bolt body having at least a threaded portion; and a head. A bolt through hole is formed in the cover. The bolt body is inserted into the bolt through hole. The ring temporary retaining clamp has a threaded hole corresponding to the bolt through hole. When the ring is slidably assembled into the ring groove on the outer circumferential surface of the cylindrical component, the ring temporary retaining fixture is introduced into the second ring pressing component by fastening the threaded portion of the bolt into the threaded hole of the ring temporary retaining fixture.

2. The ring assembly method according to claim 1, wherein, The first ring pressing component has: a cylindrical portion; and a plurality of elastic sheets extending from the cylindrical portion.

3. The ring assembly method according to claim 1, wherein, When the ring is moved relative to the temporary ring holding fixture in order to temporarily hold the ring in the temporary ring holding fixture, the ring movement limiting member having an outer diameter larger than the outer diameter of the large diameter portion is brought into contact with the large diameter portion of the temporary ring holding fixture.

4. The ring assembly method according to claim 1, wherein, The ring temporary holding clamp includes a temporary holding insertion part, which is inserted into the internal space of the cylindrical component when the ring temporary holding clamp is installed onto the cylindrical component. A temporary holding side locking hole is formed on the outer peripheral surface of the temporary holding insertion part. The cylindrical component has a radially penetrating locking hole on the side of the cylindrical component. When installing the ring temporary holding clamp to the cylindrical component, the temporary holding insertion part of the ring temporary holding clamp is inserted into the internal space of the cylindrical component, and the locking hole on the cylindrical component side is aligned with the locking hole on the temporary holding side, and the locking pin is inserted into the locking hole on the cylindrical component side and the locking hole on the temporary holding side.

5. The ring assembly method according to claim 4, wherein, The ring temporary holding clamp has a permanent magnet that is magnetically engaged with a locking pin inserted into the locking hole on the temporary holding side.

6. A manufacturing method, which is a method for manufacturing a shaft assembly. The shaft assembly includes: Cylindrical components, with an annular groove formed on their outer circumferential surface; and A ring, assembled in the ring groove, The manufacturing method includes the following steps: The ring is disposed on the small-diameter portion of a ring temporary holding clamp that sequentially includes a small-diameter portion, a tapered portion, and a large-diameter portion. The outer diameter of the small-diameter portion is smaller than the outer diameter of the large-diameter portion. The outer circumferential surface of the tapered portion is formed in such a way that it connects the outer circumferential surface of the small-diameter portion and the outer circumferential surface of the large-diameter portion. The outer diameter of the large-diameter portion is greater than or equal to the outer diameter of the cylindrical component. A first ring pressing component is used to move the ring from the small-diameter portion to the large-diameter portion via the tapered portion, thereby temporarily holding the ring in the ring temporary holding clamp. The first ring pressing component is cylindrical, with its front end capable of elastic displacement in the radial direction and having a first length in the axial direction. The temporary ring holding clamp is installed on the cylindrical component. A second ring press-in component is used to transfer the ring from the large-diameter portion of the ring temporary holding clamp to the outer circumferential surface of the cylindrical component. The second ring press-in component is cylindrical and has a second length in the axial direction that is shorter than the first length. Using the second ring press-in component, the ring is slidably assembled into the ring groove on the outer circumferential surface of the cylindrical component. The second ring press-in component includes: a cylindrical portion; a cover portion that closes the end of the cylindrical portion; and a bolt. The bolt includes: a bolt body having at least a threaded portion; and a head. A bolt through hole is formed in the cover. The bolt body is inserted into the bolt through hole. The ring temporary retaining clamp has a threaded hole corresponding to the bolt through hole. When the ring is slidably assembled into the ring groove on the outer circumferential surface of the cylindrical component, the ring temporary retaining fixture is introduced into the second ring pressing component by fastening the threaded portion of the bolt into the threaded hole of the ring temporary retaining fixture.

7. The manufacturing method according to claim 6, wherein, The first ring pressing component has: a cylindrical portion; and a plurality of elastic sheets extending from the cylindrical portion.

8. The manufacturing method according to claim 6, wherein, When the ring is moved relative to the temporary ring holding fixture in order to temporarily hold the ring in the temporary ring holding fixture, the ring movement limiting member having an outer diameter larger than the outer diameter of the large diameter portion is brought into contact with the large diameter portion of the temporary ring holding fixture.

9. The manufacturing method according to claim 6, wherein, The ring temporary holding clamp includes a temporary holding insertion part, which is inserted into the internal space of the cylindrical component when the ring temporary holding clamp is installed onto the cylindrical component. A temporary holding side locking hole is formed on the outer peripheral surface of the temporary holding insertion part. The cylindrical component has a radially penetrating locking hole on the side of the cylindrical component. When installing the ring temporary holding clamp to the cylindrical component, the temporary holding insertion part of the ring temporary holding clamp is inserted into the internal space of the cylindrical component, and the locking hole on the cylindrical component side is aligned with the locking hole on the temporary holding side, and the locking pin is inserted into the locking hole on the cylindrical component side and the locking hole on the temporary holding side.

10. The manufacturing method according to claim 9, wherein, The ring temporary holding clamp has a permanent magnet that is magnetically engaged with a locking pin inserted into the locking hole on the temporary holding side.

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