Caulking tool, resolver unit, and method of manufacturing resolver unit

Abstract

An object of the present disclosure is to provide a caulking tool, a resolver unit, and a method of manufacturing a resolver unit capable of simplifying attachment of a member to the inside of a tubular member.SOLUTION: A caulking tool (1) according to the present disclosure includes one or more processing portions (11) formed at one end of a main body (10) and protruding in a direction along a tool axis (LT), wherein when a portion of each processing portion (11) on the main body (10) side is defined as a base portion (11a), a processing portion inner peripheral side surface (13) which is an inner peripheral side surface of each processing portion (11) is inclined in a direction away from the tool axis (LT) from the base portion (11a) toward a boundary line (12), the main body (10) is inserted into a cylindrical workpiece and pressed against a portion formed inside the workpiece, thereby plastically deforming the portion formed inside the workpiece in a direction toward a tool axis (LT).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a crimping tool, a resolver unit, and a method for manufacturing a resolver unit. [Background technology]

[0002] BACKGROUND ART Conventionally, a resolver unit has been known in which a resolver device is disposed inside a space enclosed by a casing for dustproofing and waterproofing (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2024-56903 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, resolver units have required high dustproof and waterproof performance depending on the environment in which they are used, making it necessary to improve the airtightness of the resolver unit. Therefore, when arranging a resolver device inside a casing, a sealing member has been arranged between the casing and a rotating shaft protruding from the casing to improve the airtightness of the casing. When arranging the sealing member in the casing, for example, it is necessary to provide a flange on the sealing member, sandwich the flange between the casing and another member, and maintain the flange pressed against the casing. In such cases, methods such as using a screw to press the member against the casing from above the flange or using a separate retaining ring to press the flange against the casing have been used. However, inside a cylindrical workpiece such as a casing, it is difficult to secure sufficient working space for tasks such as tightening multiple screws, making the work difficult and preventing simplification of the work.

[0005] In order to solve the above problems, the present disclosure aims to provide a crimping tool, a resolver unit, and a method for manufacturing a resolver unit that can simplify the installation of components inside a cylindrical workpiece. [Means for solving the problem]

[0006] The crimping tool according to the present disclosure comprises a cylindrical body having a tool axis as its central axis, and one or more processing portions formed at one end of the body and protruding in a direction along the tool axis, with a boundary line formed at the protruding tip of each processing portion, and each boundary line coinciding with a portion of the circumference of an imaginary circle centered on the tool axis, and when the body side portion of each processing portion is taken as the base, the inner peripheral surface of each processing portion, which is the inner peripheral face of the processing portion, is inclined in a direction away from the tool axis as it moves from the base to the boundary line, and the body is inserted inside a cylindrical workpiece and pressed against a portion formed inside the workpiece, thereby plastically deforming the portion formed inside the workpiece in a direction toward the tool axis.

[0007] The resolver unit according to the present disclosure comprises a cylindrical outer casing with a bottom having a bottom plate portion serving as a bottom, a detection unit, and a sealing member sandwiched and fixed between the outer casing and the detection unit. The detection unit has the detection unit casing, an annular stator structure arranged inside the detection unit casing, and a rotating shaft rotatably arranged in the detection unit casing and protruding from the inside of the annular stator structure beyond one end of the detection unit casing toward the outside of the detection unit casing. A sealing through-hole is formed in the sealing member, and an outer shaft hole is formed in the bottom plate portion. The detection unit is arranged inside the outer casing with the rotating shaft inserted into the sealing through-hole and the outer shaft hole. A deformed portion is formed on the inner circumference of the outer casing, and at least a part of the deformed portion has one or more crimped portions formed therein that are plastically deformed in a direction toward the inside of the outer casing. Each crimped portion presses an end of the detection unit and fixes the detection unit to the inside of the outer housing.

[0008] A method for manufacturing a resolver unit according to the present disclosure includes a preparation process for preparing the crimping tool according to the present disclosure, a bottomed cylindrical outer casing having a bottom plate portion, a detection unit, and a sealing member; an arrangement process for arranging the sealing member, the detection unit, and the crimping tool inside the outer casing, facing the bottom plate portion, in that order: sealing member, detection unit, and crimping tool; and a crimping process for applying a force to the crimping tool along the direction of the tool axis after the arrangement process, causing the crimping tool to deform a deformed portion formed on the inner circumference of the outer casing.In the crimping process, a processed portion is pressed against at least a portion of the deformed portion, and at least a portion of the deformed portion is plastically deformed in a direction toward the tool axis, thereby forming a crimped portion in at least a portion of the deformed portion, and the outer casing and the detection unit are fixed to each other by the crimped portion. [Effects of the Invention]

[0009] According to the crimping tool, resolver unit, and method for manufacturing a resolver unit according to the present disclosure, it is possible to simplify the attachment of a member to the inside of a cylindrical workpiece. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view showing a crimping tool according to a first embodiment. [Figure 2] FIG. 2 is a schematic view showing the tip side of the crimping tool of FIG. [Figure 3] 1 is a schematic diagram showing a resolver unit according to a first embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing the outer casing of FIG. 3. [Figure 5] FIG. 5 is an enlarged view of part C in FIG. [Figure 6] FIG. 4 is a perspective view showing the sealing member of FIG. 3. [Figure 7] 7 is an enlarged cross-sectional view of the sealing member of FIG. 6. FIG. [Figure 8] FIG. 4 is an enlarged view of part A in FIG. 3. [Figure 9] FIG. 4 is an enlarged view of part B in FIG. 3. [Figure 10]FIG. 4 is a cross-sectional view taken along line XX in FIG. [Figure 11] 4 is a flowchart showing a method for manufacturing the resolver unit according to the first embodiment. FIG. [Figure 12] 12A to 12C are schematic diagrams showing the assembly process of the resolver unit in the arrangement step of FIG. 11. [Figure 13] 13 is a schematic view showing a state in which the resolver unit of FIG. 12 and a crimping tool are placed in a press machine. FIG. [Figure 14] 12 is a schematic view showing the state of the resolver unit and the crimping tool in the crimping step of FIG. 11. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Embodiment 1 Fig. 1 is a cross-sectional view showing a crimping tool 1 according to embodiment 1. Fig. 2 is a schematic view showing the tip side of the crimping tool 1 of Fig. 1. The cross-sectional view of Fig. 1 is a cross-sectional view taken along line II of Fig. 2.

[0012] The crimping tool 1 is a tool used to plastically deform a portion of a metal part in the manufacture of machine parts, etc. The crimping tool 1 of the present disclosure plastically deforms a portion formed inside an object to be processed. The object to be processed is, for example, a cylindrical metal part.

[0013] The crimping tool 1 includes a cylindrical main body 10 and eight processing portions 11 formed at one end of the main body 10. The main body 10, i.e., the crimping tool 1, has a tool axis LT, which is the central axis.

[0014] One end of the main body 10 along the tool axis LT is the front end, and the end opposite the front end is the rear end. Each processing portion 11 is a portion formed at the front end of the main body 10 that protrudes in the direction along the tool axis LT. Each processing portion 11 has a mountain-like shape that protrudes in the direction from the rear end of the main body 10 toward the front end along the tool axis LT.

[0015] The summit portion of each mountain-shaped processing portion 11 has a length, and this summit is defined as the boundary line 12. A boundary line 12 is formed on the protruding tip side of each processing portion 11, and in this embodiment 1, each boundary line 12 is formed at the very tip of the corresponding processing portion 11. The portion of each processing portion 11 on the main body 10 side is defined as the base 11a. In other words, the base 11a is the bottom part of the foot of each mountain-shaped processing portion 11. Each processing portion 11 protrudes in a direction along the tool axis LT from the base 11a toward the boundary line 12 on the tip side.

[0016] Each boundary line 12 is formed so as to be located on the circumference of an imaginary circle VS whose center is on the tool axis line LT. That is, each boundary line 12 coincides with a portion of the circumference of the imaginary circle VS. The diameter of the imaginary circle VS is smaller than the outer diameter of the main body 10 and larger than the inner diameter of the main body 10.

[0017] That is, each machining portion 11 protrudes from the end face of the cylindrical wall that constitutes the main body 10, and when viewing the tip side of the main body 10 from the tool axis LT, each boundary line 12 exists on the end face of the cylindrical wall that constitutes the main body 10.

[0018] When each processed portion 11 is viewed from the boundary line 12 side along the tool axis line LT, the processed portions 11 are formed at equal intervals along the circumferential direction of the imaginary circle VS. Each processed portion 11 is gently inclined from the boundary line 12 in a direction from the boundary line 12 toward the tool axis line LT and in a direction from the boundary line 12 away from the tool axis line LT.

[0019] The surface inclined in the direction from the boundary line 12 toward the tool axis line LT is the processing portion inner peripheral side surface 13. That is, each processing portion inner peripheral side surface 13 is the inner peripheral surface of the corresponding processing portion 11, and is continuous with the inner peripheral surface of the main body 10. Each processing portion inner peripheral side surface 13 is inclined in the direction away from the tool axis line LT as it extends from the base 11a of the processing portion 11 toward the boundary line 12.

[0020] Each machining portion inner peripheral side surface 13 is a part of the surface of an imaginary cone having its apex on the tool axis LT and its base at an imaginary circle VS. In this case, the apex of the imaginary cone is located closer to the rear end of the main body 10 than each boundary line 12 in the direction along the tool axis LT.

[0021] When each machining portion 11 is viewed from the boundary line 12 side along the tool axis LT, each machining portion 11 has a pair of machining portion end faces 14, which are a pair of surfaces that intersect with the circumferential direction of the imaginary circle VS. That is, each machining portion 11 has a pair of machining portion end faces 14 at the ends of each machining portion 11 in the circumferential direction of the imaginary circle VS.

[0022] When a pair of imaginary lines VL are defined along the surfaces of the pair of processing portion end faces 14 of each processing portion 11, the pair of imaginary lines VL approach each other as they approach the tool axis line LT. The pair of imaginary lines VL corresponding to each processing portion 11 intersect before reaching the tool axis line LT.

[0023] Here, a pair of lines extending along the radial direction of the imaginary circle VS intersect with each other at the center of the imaginary circle VS, i.e., on the tool axis LT. On the other hand, the pair of imaginary lines VL intersect with each other before reaching the tool axis LT. In other words, the pair of imaginary lines VL are inclined in a direction that approaches each other more closely as they approach the tool axis LT than the line extending along the radial direction of the imaginary circle VS.

[0024] In each processed portion 11 having such characteristics, the distance on the inner peripheral side surface 13 of each processed portion along the boundary line 12 becomes longer as it approaches the boundary line 12, and becomes shorter as it moves away from the boundary line 12 and approaches the base 11a of the processed portion 11.

[0025] A pressure-receiving portion 18 that receives a force applied in a direction from the rear end to the front end along the tool axis LT is formed at the rear end of the main body 10. The pressure-receiving portion 18 is formed as a plane that is perpendicular to the tool axis LT.

[0026] At the rear end of the main body 10, a component passing portion 15 is formed, which is a portion obtained by cutting out a part of the wall that forms the continuous end face of the rear end of the main body 10. Note that the component passing portion 15 does not necessarily have to be a portion obtained by cutting out the wall at the rear end. For example, the component passing portion 15 may be a through hole formed in the wall of the main body 10.

[0027] The crimping tool 1 is used by being inserted into the cylindrical workpiece from the tip end. When the crimping tool 1 is inserted into the workpiece, a portion of the rear end of the crimping tool 1 does not fit into the cylindrical workpiece and protrudes outside the workpiece.

[0028] At least a portion of the member passing portion 15 is formed in a portion of the crimping tool 1 that protrudes from the workpiece. For example, the workpiece may have components such as wiring or piping extending from its interior. In such a case, the components such as wiring or piping extending from the workpiece can be drawn out to the outside of the crimping tool 1 through the space that is a through-hole formed inside the cylindrical main body 10, from the workpiece, via the member passing portion 15.

[0029] The method of using the crimping tool 1 is to insert the crimping tool 1 tip-first into the interior of a cylindrical workpiece, and then apply force to the pressure-receiving portion 18 of the crimping tool 1. As a result, the portion formed inside the workpiece is pressed against the inner peripheral side surface 13 of each processing portion 11 and plastically deformed so as to fall in the direction toward the tool axis LT. In this way, the crimping tool 1 can be used to plastically deform the portion formed inside the workpiece.

[0030] Next, a resolver unit 100 will be described as a mechanical component manufactured using the crimping tool 1. Fig. 3 is a schematic diagram showing the resolver unit 100 according to the first embodiment. The resolver unit 100 has a cylindrical shape with a unit axis L as the central axis. Fig. 3 shows a cross section taken along the unit axis L.

[0031] The resolver unit 100 comprises a cylindrical outer casing 101 with a bottom, a detection unit 110 arranged inside the outer casing 101, a sealing member 120 sandwiched and fixed between the outer casing 101 and the detection unit 110, and a wiring connection unit 103 that covers the opening portion of the outer casing 101.

[0032] The rotating shaft 112, which is a component of the detection unit 110, protrudes and extends from one end of the resolver unit 100, i.e., the outer casing 101. The axis of the rotating shaft 112 is on the unit axis L. The detection unit 110 and the rotating shaft 112 will be described later.

[0033] Fig. 4 is a cross-sectional view showing the outer casing 101 of Fig. 3. Fig. 5 is an enlarged view of part C of Fig. 4. A bottom plate portion 102, which is the bottom portion, is formed at one end of the outer casing 101. An outer casing opening 101a is formed at the other end opposite to the one end of the outer casing 101. An outer shaft hole 102a is formed in the center of the bottom plate portion 102.

[0034] The inner periphery of the outer casing 101 is formed with a small diameter portion 101b extending from the bottom plate portion 102 toward the outer casing opening 101a, which is the other end, and a large diameter portion 101c continuing from the small diameter portion 101b to the outer casing opening 101a. The inner diameter of the small diameter portion 101b is smaller than the inner diameter of the large diameter portion 101c.

[0035] A step is formed at the boundary between the small diameter portion 101b and the large diameter portion 101c, and an inner circumferential groove 101d is formed in the step.

[0036] The inner circumferential groove 101d is a groove that has a depth in the direction along the unit axis L. The inner circumferential groove 101d opens along the unit axis L toward the outer casing opening 101a.

[0037] A deformed portion 104, which is an annular wall that defines the inner circumferential groove 101d, is formed on the center side of the outer casing 101, i.e., on the unit axis L side of the inner circumferential groove 101d. The surface of the deformed portion 104 on the unit axis L side, i.e., the inner circumferential surface of the deformed portion 104, is part of the inner circumferential surface of the small diameter portion 101b on the outer casing opening 101a side. In other words, the inner diameter of the deformed portion 104 and the inner diameter of the small diameter portion 101b are equal.

[0038] The annular wall facing the deformed portion 104 that defines the inner circumferential groove 101d is a part of the wall that defines the outer shape of the outer casing 101.

[0039] 3, the detection unit 110 includes a detection unit casing 111, a rotating shaft 112, a stator structure 113, a disk-shaped detection unit cover 114, a first bearing 115, a second bearing 116, and wiring 130.

[0040] The detection unit casing 111 has a cylindrical shape with a bottom. A detection unit lid 114 is disposed in an open portion facing the bottom of the detection unit casing 111. A through-hole is formed in the center of the bottom of the detection unit casing 111. Whether or not to form a through-hole in the bottom of the detection unit casing 111 can be selected as appropriate.

[0041] A rotating shaft 112, a stator structure 113, a first bearing 115, and a second bearing 116 are arranged inside the detection unit casing 111 in which the detection unit cover 114 is arranged. The rotating shaft 112, the stator structure 113, the first bearing 115, and the second bearing 116 are arranged inside the detection unit casing 111 so that their respective central axes coincide with the central axis of the detection unit casing 111.

[0042] The rotating shaft 112 is a long, rod-shaped member that rotates around a central axis in the longitudinal direction. The stator structure 113 is an annular device, i.e., it has a space that is a hole that runs through the center. The stator structure 113 can detect the rotational conditions, such as the rotational speed, of the rotor placed inside the space formed at the center of the stator structure 113 in cooperation with an external control device (not shown).

[0043] The first bearing 115 and the second bearing 116 are each a well-known bearing such as a bearing. The first bearing 115 is arranged on one end side of the detection unit casing 111, i.e., in a location close to the detection unit lid 114. The second bearing 116 is arranged on the other end side opposite to the one end side of the detection unit casing 111, i.e., in a location close to the bottom of the detection unit casing 111.

[0044] The stator structure 113 is disposed between a first bearing 115 and a second bearing 116. The rotating shaft 112 is rotatably supported by the first bearing 115 and the second bearing 116. That is, the rotating shaft 112 is disposed rotatably relative to the detection unit casing 111.

[0045] In a state in which the rotating shaft 112 is supported by the first bearing 115 and the second bearing 116, the rotating shaft 112 cannot move in a direction along the central axis of the rotating shaft 112.

[0046] When the rotating shaft 112 is supported by the first bearing 115 and the second bearing 116, the rotating shaft 112 passes through a space that is a hole formed in the center of the stator structure 113. Therefore, the stator structure 113 can detect the rotation status of the rotating shaft 112.

[0047] The rotating shaft 112 extends through a hole formed in the detection unit lid 114. The rotating shaft 112 protrudes from a hole in the detection unit lid 114 located at one end of the detection unit casing 111, and extends toward the outside of the detection unit casing 111.

[0048] The wiring 130 is composed of a plurality of electric wires, each of which functions as a signal line and a power line. The wiring 130 is connected to the stator structure 113. The stator structure 113 receives power via the wiring 130 and can transmit signals acquired by the stator structure 113 to the outside.

[0049] Wiring 130 extending from stator structure 113 passes through wiring hole 111 a formed in the bottom of the other end of detection unit casing 111 and extends to the outside of detection unit casing 111 .

[0050] The sealing member 120 seals the gap between the rotating shaft 112 and the outer casing 101. Fig. 6 is a perspective view showing the sealing member 120 of Fig. 3. Fig. 7 is an enlarged cross-sectional view of the sealing member 120 of Fig. 6. Fig. 6 shows the sealing member 120 with a portion cut away.

[0051] The sealing member 120 has an annular shape with a flange portion. The central axis of the annular sealing member 120 is defined as a sealing axis line LS. A sealing through-hole 120a is formed in the center of the sealing member 120 along the sealing axis line LS.

[0052] The sealing member 120 has a sealing body 121 and an annular spring member 122. The sealing body 121 is made of a resin material such as rubber.

[0053] The sealing body 121 has a circular ring shape. Since the sealing body 121 has substantially the same shape as the sealing member 120, the central axis of the sealing body 121 is the same as the sealing axis LS. A sealing flange portion 121b is formed at one end of the sealing body 121 in the direction along the sealing axis LS.

[0054] A sealing through-hole 120a is formed in the sealing body 121 along the sealing axis LS. A sealing groove 121a is formed in the sealing body 121, opening toward the end opposite to the end where the sealing flange portion 121b is formed. The sealing groove 121a is a continuous annular groove.

[0055] The sealing groove 121a is formed along the outer periphery of the sealing through-hole 120a. The sealing groove 121a has a depth in the direction along the sealing axis LS of the sealing body 121.

[0056] The spring member 122 is inserted into the sealing groove 121a. The spring member 122 has a V-shaped cross section. When the spring member 122 is inserted into the sealing groove 121a, the spring force generated by the spring member 122 is applied in a direction that widens the groove width of the sealing groove 121a.

[0057] That is, the spring member 122 can apply a force to reduce the diameter of the sealing through-hole 120a.

[0058] It is to be noted that the spring member 122 may have a cross section other than a V-shaped cross section. The sealing member 120 does not have to have the spring member 120. In that case, the sealing groove 121a does not have to be formed in the sealing main body 121. The sealing main body 121 does not have to have the sealing flange portion 121b.

[0059] 3, the description will continue. The wiring connection part 103 has a disk shape. By being disposed in the outer casing opening 101a of the outer casing 101, the wiring connection part 103 can close the outer casing opening 101a.

[0060] In the resolver unit 100, the detection unit 110 is disposed inside the outer casing 101 with the rotating shaft 112 inserted into the sealing through-hole 120a and the outer axial hole 102a. The sealing member 120 is disposed in such a manner that it is pressed against the outer axial hole 102a by disposing the detection unit 110 in the outer casing 101. The sealing member 120 is disposed in a fixed state sandwiched between the detection unit 110 and the outer casing 101.

[0061] Fig. 8 is an enlarged view of part A in Fig. 3. Fig. 8 shows the state of the outer shaft hole 102a when the detection unit 110 and the sealing member 120 are arranged inside the outer casing 101.

[0062] The sealing member 120 is fixed to the outer axial hole 102a while being sandwiched between the bottom plate 102 and the detection unit lid 114. In particular, the sealing flange 121b is crushed while being sandwiched between the bottom plate 102 and the detection unit lid 114, thereby improving the airtightness between them.

[0063] Furthermore, when the sealing flange portion 121b is crushed, the force is propagated within the sealing body 121 and cooperates with the spring member 122 to improve the sealing performance between the rotating shaft 112 and the sealing member 120.

[0064] In this way, the gaps formed between the bottom plate portion 102 and the sealing member 120 and between the rotating shaft 112 and the sealing member 120 are filled by the sealing member 120 .

[0065] Continuing the explanation by returning to Figure 3, the detection unit 110 is fixed inside the outer casing 101 by adhesive 140 and crimped portion 104a. First, the fixing of the detection unit 110 by adhesive 140 will be explained.

[0066] The adhesive 140 is placed between the inner periphery of the small diameter portion 101b of the outer casing and the outer periphery of the detection unit casing 111, and hardens to bond them together.

[0067] Next, the fixation of the detection unit 110 at the crimped portion 104a will be described. Fig. 9 is an enlarged view of portion B in Fig. 3. Fig. 10 is a cross-sectional view taken along line XX in Fig. 3. The description will continue with Figs. 3, 9, and 10. The detection unit 110 is fixed and disposed inside the outer casing 101 by plastically deforming the deformation portion 104.

[0068] A part of the deforming portion 104 is plastically deformed toward a corner 110a, which is an end of the detection portion 110. The plastically deformed part of the deforming portion 104 is referred to as a crimped portion 104a. The deforming portion 104 has eight crimped portions 104a formed therein.

[0069] The crimped portions 104a are formed at equal intervals from one another. That is, the deforming portion 104 has eight crimped portions 104a that are plastically deformed so as to fall in the direction of the unit axis L, and each crimped portion 104a presses the detecting portion 110.

[0070] In this way, the sealing member 120 and the detection unit 110 are fixed and arranged inside the outer casing 101. With the sealing member 120 and the detection unit 110 fixed and arranged inside the outer casing 101, the wiring connection unit 103 is installed in the outer casing opening 101a.

[0071] Furthermore, external wiring 131 is connected to wiring connection portion 103. External wiring 131 is formed by passing multiple electric wires serving as multiple signal lines and power lines through a wiring protection member such as a flexible pipe. Multiple terminals to which the corresponding electric wires are connected protrude from the end of external wiring 131.

[0072] Each terminal extends from an end of the external wiring 131 beyond the wiring connection portion 103 into the inside of the outer casing 101. A corresponding electric wire of the wiring 130 is connected to each terminal protruding from the external wiring 131. This allows the stator structure 113 to obtain electric power and send and receive signals to and from external devices.

[0073] Next, a method for manufacturing the resolver unit 100 will be described. Fig. 11 is a flow diagram showing a method for manufacturing the resolver unit 100 according to the first embodiment. In the first embodiment, the workpiece of the crimping tool 1 is the outer casing 101, and the members attached to the inside of the workpiece are the sealing member 120 and the detection unit 110.

[0074] <Preparation process> In step S01, a preparation step is performed in which components of the resolver unit 100 are prepared.

[0075] To manufacture the resolver unit 100, an operator prepares the outer casing 101, the detection unit 110, the sealing member 120, and the crimping tool 1.

[0076] The detection unit 110 is prepared by arranging a rotating shaft 112, a stator structure 113, a detection unit cover 114, a first bearing 115, a second bearing 116, and wiring 130 in a detection unit casing 111. The sealing member 120 is prepared by arranging a spring member 122 in a sealing body 121. This completes the preparation process. The process then proceeds to the next step.

[0077] <Placement process> In step S02, an arrangement process is performed. The arrangement process is a process in which the parts prepared in the preparation process are assembled and the assembled intermediate product is arranged on the press device 300. Fig. 12 is a schematic diagram showing the assembly process of the resolver unit 100 in the arrangement process of Fig. 11.

[0078] 12 shows a state in which the outer casing 101, the sealing member 120, the detection unit 110, and the crimping tool 1 are arranged so that the tool axis LT and the unit axis L coincide with each other. Also, Fig. 12 shows cross sections of the outer casing 101, the sealing member 120, the detection unit 110, and the crimping tool 1 taken along the tool axis LT and the unit axis L, respectively.

[0079] First, adhesive 140 is applied to bond outer casing 101 and detection unit 110 disposed inside outer casing 101 to each other. With detection unit 110 disposed inside outer casing 101, the inner circumferential surface of small diameter portion 101b of outer casing 101 faces the outer circumferential surface of detection unit 110. Therefore, adhesive 140 is applied to the inner circumferential surface of small diameter portion 101b, i.e., the inner circumferential surface of outer casing 101 facing detection unit casing 111.

[0080] In the first embodiment, the adhesive 140 is applied to two regions on the inner circumferential surface of the small diameter portion 101b. However, the regions to which the adhesive 140 is applied can be selected as appropriate. Furthermore, for example, the adhesive 140 may be applied to the outer circumferential surface of the detection unit casing 111, or may be applied to both the outer circumferential surface of the detection unit casing 111 and the inner circumferential surface of the outer casing 101 facing the detection unit casing 111.

[0081] That is, the adhesive 140 is applied to at least one of the outer peripheral surface of the detection unit casing 111 and the inner peripheral surface of the outer casing 101, which face each other.

[0082] Next, inside the outer casing 101, the sealing member 120, the detection unit 110, and the crimping tool 1 are arranged in this order facing the bottom plate 102 of the outer casing 101.

[0083] First, the sealing member 120 is placed relative to the detection unit 110. The rotary shaft 112 protruding from the detection unit 110 is inserted into the sealing through-hole 120a from the sealing flange portion 121b side of the sealing member 120.

[0084] Next, the sealing member 120 and the detection unit 110, which are now arranged together, are placed inside the outer casing 101. At this time, the detection unit 110 is placed so that the sealing member 120 faces the bottom plate portion 102.

[0085] Note that procedures other than those described above may be used for placing the sealing member 120 and the detection unit 110 in the outer casing 101. For example, the sealing member 120 may be placed first in the outer casing 101. In this case, the sealing member 120 is first fitted and placed along the inner periphery of the outer axial hole 102a.

[0086] In this state, the sealing flange portion 121b faces the outer casing opening 101a. Next, the detection unit 110 is placed inside the outer casing 101 while the rotating shaft 112 is inserted into the sealing through-hole 120a of the sealing member 120. The sealing member 120 and the detection unit 110 may be placed in the outer casing 101 in this manner.

[0087] The order of applying the adhesive 140 and placing the sealing member 120 on the detection unit 110 does not need to be particularly determined. The application of the adhesive 140 may be performed before placing the detection unit 110 inside the outer casing 101.

[0088] When the sealing member 120 and the detection unit 110 are placed inside the outer casing 101, the rotating shaft 112 is inserted into the outer shaft hole 102a formed in the bottom plate portion 102. The detection unit 110 is inserted into the outer casing 101 until the sealing member 120 and the detection unit cover 114 each abut against the bottom plate portion 102 of the outer casing 101.

[0089] When the sealing member 120 and the detection unit cover 114 respectively hit the bottom plate portion 102 of the outer casing 101, the sealing member 120 and the detection unit 110 are placed inside the outer casing 101. The sealing member 120, the detection unit 110, and the outer casing 101 in this state are called intermediate products.

[0090] The crimping tool 1 is inserted as an intermediate product into the outer casing 101 through the outer casing opening 101a of the outer casing 101. As a result, the sealing member 120, the detection unit 110, and the crimping tool 1 are arranged inside the outer casing 101.

[0091] That is, in the arrangement step, when the sealing member 120, the detection unit 110, and the crimping tool 1 are arranged inside the outer casing 101, the sealing member 120 is sandwiched between the detection unit 110 and the outer casing 101, the rotating shaft 112 is inserted into and passes through the sealing through-hole 120a and the outer shaft hole 102a, and the detection unit 110 is arranged inside the outer casing 101. Furthermore, the crimping tool 1 is arranged inside the outer casing 101 facing the detection unit 110 arranged inside the outer casing 101.

[0092] The maximum outer diameter of at least the portion of the crimping tool 1 that is placed inside the outer casing 101 is smaller than the inner diameter of the large diameter portion 101c of the outer casing 101. The diameter of the imaginary circle VS is larger than the outer diameter of the deformed portion 104 and smaller than the inner diameter of the wall of the inner circumferential groove 101d that faces the outer peripheral surface of the deformed portion 104.

[0093] When the crimping tool 1 is inserted into the inside of the outer casing 101 from the outer casing opening 101a side, the portion including the boundary line 12 of each processing portion 11 of the crimping tool 1 fits into the inner circumferential groove 101d, and the inner circumferential side surface 13 of the processing portion comes into contact with the end of the deformed portion 104.

[0094] That is, when the detection unit 110 and the crimping tool 1 are arranged inside the outer casing 101, the portion including the boundary line 12 of each processing portion 11 of the crimping tool 1 is fitted into the inner circumferential groove 101d formed on the inner circumference of the outer casing 101.

[0095] FIG. 13 is a schematic diagram showing a state in which the resolver unit 100 and the crimping tool 1 shown in FIG.

[0096] The outer casing 101, inside which the detection unit 110 and the crimping tool 1 are arranged, is placed in the press device 300 with the press upper jig 200 arranged above the crimping tool 1 and the press lower jig 201 arranged below the outer casing 101.

[0097] When the press device 300 used in the present embodiment 1 is in operation, it can apply a force in the vertical direction to a workpiece placed on the press device 300. The press device 300 has a lower fixed part 302 and a sliding part 301 that is disposed above the fixed part 302 and descends toward the fixed part 302.

[0098] In the press device 300, the sliding portion 301 is lowered toward the workpiece placed between the fixed portion 302 and the sliding portion 301, thereby clamping the workpiece between the fixed portion 302 and the sliding portion 301 and applying force to the workpiece.

[0099] The intermediate product and the crimping tool 1 are placed in a press device 300 with an upper press jig 200 and a lower press jig 201 arranged therein. The upper press jig 200 is arranged so as to face the pressure-receiving portion 18 of the crimping tool 1.

[0100] The press upper jig 200 may be formed with a protrusion that fits into the large diameter portion 101c, which is the inner circumferential portion of the crimping tool 1. By inserting and arranging the protrusion inside the crimping tool 1, it is possible to prevent the crimping tool 1 and the press upper jig 200 from being misaligned with each other. Note that the press upper jig 200 does not necessarily have to be formed with the protrusion.

[0101] The press lower jig 201 is disposed below the intermediate product. The press lower jig 201 has a hole formed therein into which the rotation shaft 112 protruding from the outer casing 101 is inserted.

[0102] The intermediate product is positioned so that the protruding rotation shaft 112 is inserted into a hole formed in the press lower jig 201. At this time, the bottom plate portion 102, which becomes the lower end of the outer casing 101, is in contact with the upper surface of the press lower jig 201.

[0103] The intermediate product arranged between the upper press jig 200 and the lower press jig 201, and the crimping tool 1 are placed in the press device 300 in such a position that the unit axis L and the tool axis LT are aligned vertically, the crimping tool 1 is on the upper side, and the rotating shaft 112 protruding from the outer casing 101 is on the lower side.

[0104] 13, when the crimping tool 1 is placed inside the outer casing 101, the rear end portion of the crimping tool 1 protrudes from the outer casing 101 and is exposed. The member passing portion 15 is formed at the rear end portion of the crimping tool 1 that protrudes from the outer casing 101 and is exposed.

[0105] With the detection unit 110 and the crimping tool 1 disposed inside the outer casing 101, the wiring 130 extending from the detection unit 110 passes through the inside of the crimping tool 1 and is drawn out from the member passing portion 15. This completes the placement process. The process then proceeds to the next step.

[0106] <Crimping process> Returning to Fig. 11, the description will continue. In step S03, a crimping process is carried out. In the crimping process, a press device 300 is operated, and a force is applied to the intermediate product in the vertical direction using a crimping tool 1 to perform processing. Fig. 14 is a schematic diagram showing the state of the resolver unit 100 and the crimping tool 1 in the crimping process of Fig. 11.

[0107] When the press device 300 is operated, the slide portion 301 of the press device 300 descends, whereby the slide portion 301 comes into contact with the press upper jig 200. As the slide portion 301 further descends, the crimping tool 1 moves downward together with the press upper jig 200, and penetrates into the intermediate product.

[0108] As the crimping tool 1 descends, the inner peripheral side surface 13 of the processing portion 11 of the crimping tool 1 presses the deformed portion 104 in the direction toward the unit axis L and the tool axis LT. As a result, the deformed portion 104 is deformed so as to tilt in the direction toward the unit axis L and the tool axis LT.

[0109] As the press device 300 continues to operate, the slide portion 301 and the crimping tool 1 continue to descend. As a result, the deforming portion 104, which has been pressed against the processing portion inner peripheral side surface 13, first falls in the direction toward the unit axis L and the tool axis LT, and comes into contact with the corner 110a of the detection portion 110. Furthermore, by being pressed against the processing portion inner peripheral side surface 13, the deforming portion 104 deforms so as to press the corner 110a of the detection portion 110 more firmly.

[0110] When the press device 300 determines that the deformation portion 104 has sufficiently deformed to press the corner portion 110a of the detection portion 110 and that the detection portion 110 has been fixed to the outer casing 101, it determines that processing of the outer casing 101 into the deformation portion 104 has been completed.

[0111] As a result, at least a part of the deformed portion 104 is plastically deformed in the direction toward the unit axis L and the tool axis LT to press the corner 110a of the detection portion 110, and the detection portion 110 is fixed inside the outer casing 101. At this time, the plastically deformed portion of the deformed portion 104 is the crimped portion 104a.

[0112] In this way, by operating the press device 300, the boundary line 12 of the processing portion 11 of the crimping tool 1 advances toward the bottom of the inner peripheral groove 101d, and the deformed portion 104 is pressed against the processing portion inner peripheral side surface 13 of the processing portion 11, thereby forming a crimped portion 104a in at least a part of the deformed portion 104. In other words, the main body 10 of the crimping tool 1 plastically deforms the deformed portion 104, which is a portion formed on the inner circumference of the outer casing 101, in the directions toward the unit axis L and the tool axis LT.

[0113] As a result, corners 110a of detection unit 110 are pressed by crimped portions 104a, and outer casing 101 and detection unit 110 are fixed to each other.

[0114] The corners 110a of the detection unit 110 are chamfered. Preferably, the angle of inclination of the chamfered portion of the corners 110a is made to match the angle of inclination of the inner peripheral side surface 13 of the processing portion of the crimping tool 1. This allows the crimping portion 104a to more uniformly contact the corners 110a and press down on the corners 110a more uniformly. This allows the outer casing 101 and the detection unit 110 to be more firmly fixed to each other.

[0115] When the press device 300 determines that the processing of the deformed portion 104 is complete, it stops applying force to the crimping tool 1. That is, the press device 300 stops the descent of the slide portion 301. Thereafter, the press device 300 raises the slide portion 301.

[0116] An air press that can apply pressure using air can be used as the press device 300. In an air press device, the force, i.e., the load, applied to the workpiece is controlled by program control. The press device 300 may also be capable of constantly detecting the load applied to the workpiece using, for example, a load cell.

[0117] By controlling the press device 300 by program control, a series of processing operations can be reliably performed, in which force is applied until a predetermined load at the time of completion of processing is reached, and then the application of force is stopped.

[0118] When the processing is completed, the deformed portion 104 is sufficiently deformed to form the crimped portion 104a, and the load when the processing is completed is the force applied in this state by the press device 300. The force applied when the processing is completed can be determined by a test conducted in advance.

[0119] When the force applied by the press device 300 reaches the load at the time of completion of processing, the press device 300 can determine that processing of the deformed portion 104 is complete.

[0120] The press device 300 may be controlled not only based on force but also by other well-known methods, such as a method based on the movement distance of the slide portion 301 of the press device 300.

[0121] In this case, by knowing in advance the movement distance of slide portion 301 of press device 300 or the position of slide portion 301 when deforming portion 104 has sufficiently deformed to become crimped portion 104a, it is possible to detect whether or not processing by press device 300 has been completed. Furthermore, a device other than an air press device may be appropriately selected as press device 300.

[0122] In the crimping process, since the rotating shaft 112 is inserted into the hole formed in the lower press jig 201, even when the force applied by the press device 300 is applied to the crimping tool 1 and the outer casing 101, the pressing device 300 does not directly apply force to the rotating shaft 112. Therefore, it is possible to prevent unnecessary force from being applied to the detection unit 110 including the rotating shaft 112, and the integrity of the detection unit 110 can be maintained.

[0123] After the crimping portion 104a is formed and the outer casing 101 and the detection unit 110 are fixed to each other, the intermediate product is left to harden the adhesive 140. After the adhesive 140 has sufficiently hardened, the crimping process is completed.

[0124] To harden the adhesive 140, the intermediate product may simply be left in a specific location, or may be left in an environment that hardens the adhesive 140 in a short time. For example, it may be left in an environment that is higher than normal room temperature.

[0125] Furthermore, the adhesive 140 does not necessarily need to be cured during the crimping process. For example, the adhesive 140 may be cured while the intermediate product is being transported or stored after the crimping process, or while other processes such as an inspection process are being performed.

[0126] After the crimping step, the wiring connection portion 103 and the external wiring 131 are arranged as necessary, and the resolver unit 100 is manufactured.

[0127] The crimping tool 1 in embodiment 1 has eight processing portions 11. However, this is not limited to this. The number of processing portions 11 can be selected as appropriate. For example, the processing portion 11 may be formed around the entire circumference of the surface at the tip of the main body 10. In this case, there is only one processing portion 11, and furthermore, the processing portion 11 does not have a processing portion end surface 14. Alternatively, seven or fewer processing portions 11, or nine or more processing portions 11 may be formed.

[0128] For example, there may be only one processed portion 11, and the processed portion 11 may be C-shaped, i.e., partially cut out. Even in the case of a processed portion 11 shaped like a partially cut out C, it is preferable that the distance along the boundary line 12 on the processed portion inner circumferential side surface 13 is longer the closer to the boundary line 12 and shorter the closer to the base 11a of the processed portion 11. As a result, the processed portion inner circumferential side surface 13 initially contacts the deformed portion 104 over a large area, and as processing progresses, the area of ​​the processed portion inner circumferential side surface 13 that contacts the deformed portion 104 decreases. Accordingly, as processing progresses, the force applied to the deformed portion 104 gradually increases. Therefore, the deformed portion 104 gradually deforms from the early stages of processing, and in the final stage, a high force is applied, ensuring reliable plastic deformation.

[0129] Furthermore, in the crimping tool 1 according to the first embodiment, the boundary line 12 is formed at the tip of the corresponding processing portion 11. However, this is not limited to this. That is, the boundary line 12 does not have to be at the tip of the corresponding processing portion 11. In the crimping tool 1 according to the present disclosure, it is sufficient that the portion of the processing portion 11 including the boundary line 12 enters the inner circumferential groove 101d and the crimped portion 104a is formed on the processing portion inner circumferential side surface 13 during the crimping process. Therefore, as long as the boundary line 12 and a portion of the processing portion inner circumferential side surface 13 required for the crimping process can enter the inner circumferential groove 101d, the most distal end of the processing portion 11 may be formed in the region of the processing portion 11 on the opposite side of the processing portion inner circumferential side surface 13 across the boundary line 12.

[0130] Furthermore, the resolver unit 100 in the first embodiment includes a sealing member 120. However, this is not limited to this. For example, the sealing member 120 does not have to be used. Whether or not to use the sealing member 120 is determined appropriately depending on the specifications, such as airtightness and watertightness, required for the resolver unit 100.

[0131] Furthermore, in the outer casing 101 of the resolver unit 100 in the first embodiment, the inner diameter of the deformed portion 104 and the inner diameter of the small diameter portion 101b are equal. However, this is not limited to this. The inner diameters of the deformed portion 104 and the small diameter portion 101b can be changed as appropriate depending on the shape of the detection unit casing 111. For example, if the corner portion 110a of the detection unit casing 111 has a flange-like shape with a larger diameter than the body portion of the detection unit casing 111, the deformed portion 104 can be formed at a position corresponding to the corner portion 110a. In this case, for example, the inner diameter of the deformed portion 104 is larger than the inner diameter of the small diameter portion 101b.

[0132] Furthermore, in manufacturing the resolver unit 100 in the first embodiment, the press upper jig 200 and the press lower jig 201 are used when using the press device 300. However, this is not limited to this. For example, the press upper jig 200 and the press lower jig 201 do not have to be used. Whether or not to use the press upper jig 200 and the press lower jig 201 may be appropriately selected in consideration of the processing environment, such as the shape of the press device 300 or the shapes of other jigs.

[0133] Furthermore, the press device 300 in the first embodiment operates in a vertical direction to apply force. However, this is not limited to this. For example, the press device 300 may operate in a horizontal direction to apply force.

[0134] Furthermore, in the manufacture of the resolver unit 100 in the first embodiment, the press device 300 is used. However, the present invention is not limited to this. Any mechanism may be used for applying force to the crimping tool 1, as long as it can apply a sufficient force to the crimping tool 1 and form the crimped portion 104a.

[0135] Furthermore, in the first embodiment, the corners 110a of the detection unit casing 111 are chamfered by removing the corners. However, this is not a limitation. The treatment of the corners 110a of the detection unit 110 can be selected as appropriate. For example, the corners 110a of the detection unit 110 may be chamfered to have a curved surface, or may not be chamfered at all.

[0136] The crimping tool 1 according to the first embodiment includes a cylindrical body 10 having a tool axis LT as a center axis, and one or more processing portions 11 formed at one end of the body 10 and protruding in a direction along the tool axis LT. Each processing portion 11 has a boundary line 12 formed at its protruding tip, and each boundary line 12 coincides with a portion of the circumference of an imaginary circle VS centered on the tool axis LT. When the portion of each processing portion 11 facing the body 10 is defined as a base 11a, the processing portion inner peripheral side surface 13, which is the inner peripheral surface of each processing portion 11, is inclined in a direction away from the tool axis LT as it extends from the base 11a toward the boundary line 12. The body 10 is inserted into a cylindrical workpiece and pressed against a portion formed in the workpiece, thereby plastically deforming the portion formed in the workpiece in a direction toward the tool axis LT. This facilitates plastic deformation of the portion formed in the cylindrical workpiece. Therefore, the plastically deformed portion can be used to attach a component to a cylindrical workpiece. This simplifies the process of attaching a component to the interior of a cylindrical component. Furthermore, each of the inner peripheral side surfaces 13 of each workpiece 11 is part of a surface forming an imaginary cone with an arbitrary imaginary circle VS at its base. Therefore, each inner peripheral side surface 13 extending from the boundary line 12 can uniformly plastically deform the portion formed inside the workpiece. This results in a uniformly deformed portion, improving the quality of the workpiece. This also eliminates the need for screws or fixing members to attach components to the workpiece. This eliminates the need to procure these components, simplifying the design and procurement processes. This also eliminates the need for screws or fixing members to attach components to the workpiece. This eliminates the need to secure space for screws or fixing members. This allows for further miniaturization of the workpiece. Furthermore, if screws are used for attachment, a loosening prevention device is required, but since the part formed inside the workpiece is attached to the inside of the cylindrical member by uniformly plastically deforming the part, loosening prevention is not necessary.

[0137] The crimping tool 1 according to the first embodiment has a plurality of processing portions 11, each of which is formed at equal intervals on the circumference of the imaginary circle VS. This allows the portion formed inside the workpiece to be plastically deformed at equal intervals along its inner circumference. Therefore, a uniform force can be applied to the portion formed inside the workpiece. Furthermore, this allows wrinkles to be generated in the space between two adjacent processing portions 11 when plastically deforming the portion formed inside the workpiece. Therefore, the force applied to the portion to be plastically deformed is appropriately applied to the portion to be plastically deformed without being hindered by wrinkles or the like. Therefore, by appropriately applying the force, the stability of the processing can be improved.

[0138] In the crimping tool 1 according to the first embodiment, each processing portion 11 has a pair of processing portion end faces 14 that intersect with the circumferential direction of the imaginary circle VS. The distance on the processing portion inner peripheral side surface 13 in the direction along the corresponding boundary line 12 of each processing portion 11 is longer the closer to the boundary line 12 and shorter the closer to the base 11a of the processing portion 11. As a result, at the beginning of processing, the portion to be deformed contacts the processing portion 11 over a long distance, and as processing progresses, the portion to be deformed contacts the processing portion 11 over a shorter distance. Therefore, the force applied to the portion to be deformed gradually increases as processing approaches the final stage. Therefore, an appropriate force is applied to the portion to be deformed in the final stage of processing, improving processing stability.

[0139] In the crimping tool 1 according to the first embodiment, the diameter of the imaginary circle VS is smaller than the outer diameter of the main body 10 and larger than the inner diameter of the main body 10. As a result, a processing portion 11 is formed on the end surface of the wall of the cylindrical main body 10. Therefore, the crimping tool 1 inserted into the inside of a cylindrical workpiece can plastically deform the inside of the workpiece. Furthermore, the force applied to the crimping tool 1 is directly applied to the part to be deformed via the wall portion of the main body 10, which is a rigid body, and the processing portion 11 formed at its tip. Therefore, by using the crimping tool 1, it is possible to efficiently apply force to the workpiece, and more efficient processing can be performed.

[0140] In the crimping tool 1 according to the first embodiment, the main body 10 is formed with a member passing portion 15 through which a member extending from a workpiece can pass. This allows the member extending from the workpiece to pass through the inside of the crimping tool 1 and be pulled out from the member passing portion 15 to the outside of the crimping tool 1. Therefore, for example, it is not necessary to process the workpiece before the member extending from the workpiece is attached. This allows for more freedom in setting the order in which processing is performed using the crimping tool 1.

[0141] In the crimping tool 1 according to the first embodiment, the member passing portion 15 is formed on a portion of the main body 10 that protrudes from the cylindrical portion of the workpiece when the crimping tool 1 is inserted inside the workpiece. As a result, when a press machine, for example, is used for processing using the crimping tool 1, the member can be drawn out of the press machine via the member passing portion 15. Therefore, even when a member such as a long electric wire extends from the workpiece, the member can be easily drawn out of the press machine.

[0142] In the crimping tool 1 according to the first embodiment, the member passing portion 15 is a notch formed at an end portion opposite to one end portion of the main body 10. This allows the member passing portion 15 to be formed simply by cutting out the end portion. This makes it easy to manufacture the crimping tool 1 having the member passing portion 15 formed therein.

[0143] In the crimping tool 1 according to the first embodiment, the member passing portion 15 is a through hole formed in the main body 10. This allows the member passing portion 15 to be formed without cutting out the end portion. Therefore, for example, if the force applied from a press device is received by the end portion of the crimping tool 1, the crimping tool 1 can be manufactured without reducing the pressure-receiving area. This allows the structural strength of the crimping tool 1 to be ensured.

[0144] In the crimping tool 1 according to the first embodiment, a pressure-receiving portion 18 is formed at the other end opposite to the one end of the main body 10, which receives a force applied from the other end toward the one end along the tool axis LT. This allows the crimping tool 1 to deform the workpiece with the processing portion 11 formed at the tip end by the force applied to the cylindrical rear end. Therefore, the force applied to the crimping tool 1 can be transmitted directly to the workpiece, allowing for efficient application of force.

[0145] In the crimping tool 1 according to the first embodiment, the pressure-receiving portion 18 is a plane perpendicular to the tool axis LT. This allows the crimping tool 1 to directly transmit the force applied to the cylindrical rear end portion to the workpiece. This allows for more efficient machining.

[0146] The resolver unit 100 according to the first embodiment includes a cylindrical outer casing 101 with a bottom, which has a bottom plate portion 102 serving as a bottom, a detection unit 110, and a sealing member 120 that is sandwiched and fixed between the outer casing 101 and the detection unit 110. The detection unit 110 also includes a detection unit casing 111, an annular stator structure 113 that is disposed inside the detection unit casing 111, and a rotation shaft 112 that is rotatably disposed in the detection unit casing 111 and protrudes from inside the annular stator structure 113 beyond one end of the detection unit casing 111 toward the outside of the detection unit casing 111. A sealing through-hole 120a is formed in the sealing member 120, and an outer shaft hole 102a is formed in the bottom plate portion 102. The detection unit 110 is disposed inside the outer casing 101 with the rotating shaft 112 inserted into the sealing through-hole 120a and the outer shaft hole 102a. A deformed portion 104 is formed on the inner periphery of the outer casing 101, and at least a portion of the deformed portion 104 has one or more crimped portions 104a formed therein by plastic deformation toward the inside of the outer casing 101. Each crimped portion 104a presses against a corner 110a, which is an end of the detection unit 110, thereby fixing the detection unit 110 inside the outer casing 101. Thus, the detection unit 110 and the sealing member 120 can be fixed and disposed inside the outer casing 101 simply by forming the crimped portions 104a. This simplifies the installation of the sealing member 120 and the detection unit 110 inside the outer casing 101. This also eliminates the need to prepare screws or fixing members for attaching the sealing member 120 and the detection unit 110 inside the outer casing 101. This eliminates the need to procure these parts, simplifying the design and procurement processes. If screws were used to attach the sealing member 120, a locking mechanism would be required to prevent loosening. However, by uniformly plastically deforming the crimped portion 104a, the sealing member 120 is attached to the outer casing 101, so a locking mechanism is not required. Furthermore, there is no need to secure space in the resolver unit 100 for screws or fixing members.Therefore, the resolver unit 100 can be further reduced in size.

[0147] The manufacturing method of the resolver unit 100 according to the first embodiment includes a preparation step S01 of preparing the crimping tool 1 of the present disclosure, a bottomed cylindrical outer casing 101 having a bottom plate portion 102, a detection unit 110, and a sealing member 120. The method also includes an arrangement step S02 of arranging the sealing member 120, the detection unit 110, and the crimping tool 1 inside the outer casing 101 in this order facing the bottom plate portion 102. After the arrangement step S02, the method also includes a crimping step S03 of applying a force to the crimping tool 1 along the direction of the tool axis line LT, causing the crimping tool 1 to deform a deformed portion 104 formed on the inner periphery of the outer casing 101. In the crimping process S03, the processing portion 11 is pressed against at least a portion of the deformed portion 104, causing at least a portion of the deformed portion 104 to plastically deform in a direction toward the tool axis line LT, thereby forming a crimped portion 104a in at least a portion of the deformed portion 104. The crimped portion 104a also secures the outer casing 101 and the detection unit 110 to each other. Thus, simply by forming the crimped portion 104a, the detection unit 110 and the sealing member 120 can be fixed and positioned inside the outer casing 101. This simplifies the installation of the sealing member 120 and the detection unit 110 inside the outer casing 101. This also eliminates the need to prepare screws or fixing members for installing the sealing member 120 and the detection unit 110 inside the outer casing 101. This eliminates the need to procure these components, simplifying the design and procurement processes. Furthermore, if screws are used to attach the sealing member 120, a locking mechanism is required to prevent loosening. However, by uniformly plastically deforming the crimped portion 104a, the sealing member 120 is attached to the outer casing 101, so a locking mechanism is not required. Furthermore, there is no need to secure space in the resolver unit 100 required for screws or fixing members. This allows the resolver unit 100 to be further miniaturized. This also allows the crimped portion 104a to be machined uniformly. Therefore, a resolver unit with a stable appearance can be manufactured.Furthermore, in the crimping process, the crimping tool 1 can use the structure of the crimping tool 1 fitted to the outer casing 101 as a guide mechanism to simultaneously perform operations such as attaching the sealing member 120 deep inside the outer casing 101, pressing the sealing flange portion 121b, and fixing the outer casing 101 and the detection unit 110 by crimping. This allows the resolver unit 100 to be manufactured more quickly. Furthermore, because a controlled force is applied to the crimping tool 1 from the press device 300, variations in processing between products can be reduced, allowing for the manufacture of stable products. In particular, products with stable performance in terms of airtightness can be manufactured.

[0148] In the manufacturing method of the resolver unit 100 according to the first embodiment, in the arrangement step S02, with the sealing member 120, the detection unit 110, and the crimping tool 1 arranged inside the outer casing 101, the boundary line 12 of the crimping tool 1 is fitted into an inner circumferential groove 101d formed on the inner circumference of the outer casing 101. In addition, in the crimping step S03, the boundary line 12 advances toward the bottom of the inner circumferential groove 101d, and the crimped portion 104a is formed. As a result, the crimped portion 104a can be formed in a single crimping step in a predetermined shape corresponding to the processed portion 11. Therefore, a uniform crimped portion 104a can be formed, and the resolver unit 100 can be manufactured with stable quality.

[0149] In the manufacturing method of the resolver unit 100 according to the first embodiment, the detection unit 110 includes a detection unit casing 111, an annular stator structure 113 disposed inside the detection unit casing 111, and a rotating shaft (112) protruding from inside the stator structure 113 beyond one end of the detection unit casing 111 toward the outside of the detection unit casing 111. In addition, in the disposing step S02, before disposing the detection unit 110 inside the outer casing 101, the adhesive 140 is applied to at least one of the outer peripheral surface of the detection unit casing 111 and the inner peripheral surface of the outer casing 101, which face each other. This allows the detection unit 110 to be fixed and disposed inside the outer casing 101 using the adhesive 140 in addition to the crimped portion 104a. Therefore, the sealing member 120 and the detection unit 110 can be more firmly disposed inside the outer casing 101.

[0150] In the manufacturing method of the resolver unit 100 according to the first embodiment, in the crimping step S03, the crimped portion 104a is formed, and the outer casing 101 and the detection unit 110 are fixed to each other, and then the adhesive 140 is cured. As a result, the outer casing 101 and the detection unit 110 are fixed to each other by the crimped portion 104a before the adhesive 140 hardens. Therefore, after the detection unit 110 and the sealing member 120 are fixed to appropriate positions on the outer casing 101, that is, after the sealing flange portion 121b is kept pressed against the detection unit casing 111, the detection unit 110 and the sealing member 120 are further firmly fixed to each other by the adhesive 140. Therefore, by the fixation by the crimped portion 104a and the fixation by the adhesive 140, the detection unit 110 and the sealing member 120 can be more firmly fixed and arranged at appropriate positions inside the outer casing 101. [Explanation of symbols]

[0151] 1 Crimping tool, 10 main body, 11 processed portion, 11a base portion, 12 boundary line, 13 processed portion inner peripheral side surface, 14 processed portion end surface, 15 member passing portion, 18 pressure receiving portion, 100 resolver unit, 101 outer casing, 101a outer casing opening, 101b small diameter portion, 101c large diameter portion, 101d inner peripheral groove, 102 bottom plate portion, 102a outer shaft hole, 103 wiring connection portion, 104 deformation portion, 104a crimping portion, 110 detection portion, 110a corner portion (end portion), 111 detection portion casing, 111a wiring hole, 112 rotating shaft, 113 stator structure, 114 detection portion cover, 115 first bearing, 116 second bearing, 120 sealing member, 120a sealing through hole, 121 Sealing body, 121a sealing groove, 121b sealing flange portion, 122 spring member, 130 wiring, 131 external wiring, 140 adhesive, 200 press upper jig, 201 press lower jig, 300 press device, 301 slide portion, 302 fixed portion, L unit axis, LT tool axis, LS sealing axis, VS virtual circle, VL virtual line.

Claims

1. A cylindrical body (10) having a tool axis (LT) as a central axis; One or more processing portions (11) formed at one end of the body (10) and protruding in a direction along the tool axis (LT); Equipped with A boundary line (12) is formed on the protruding tip side of each of the processed portions (11), Each of the boundary lines (12) coincides with a portion of the circumference of an imaginary circle (VS) having a center on the tool axis (LT), When a portion of each of the processing portions (11) on the main body (10) side is defined as a base (11a), a processing portion inner peripheral side surface (13) which is an inner peripheral surface of each of the processing portions (11) is inclined in a direction away from the tool axis (LT) as it moves from the base (11a) toward the boundary line (12), The main body (10) is inserted into a cylindrical workpiece and pressed against a portion formed inside the workpiece, thereby plastically deforming the portion formed inside the workpiece in a direction toward the tool axis (LT). Crimping tool (1).

2. The processed portion (11) is formed in plurality, The processed portions (11) are formed at equal intervals on the circumference of the virtual circle (VS). A crimping tool (1) according to claim 1.

3. Each of the processed portions (11) has a pair of processed portion end surfaces (14) that intersect with the circumferential direction of the virtual circle (VS), The distance on the inner peripheral side surface (13) of each processed portion (11) in the direction along the corresponding boundary line (12) is longer as it approaches the boundary line (12) and shorter as it approaches the base (11a). A crimping tool (1) according to claim 1.

4. The diameter of the imaginary circle (VS) is smaller than the outer diameter of the main body (10) and larger than the inner diameter of the main body (10). A crimping tool (1) according to claim 1.

5. The main body (10) is formed with a member passage portion (15) through which a member extending from the workpiece can pass. A crimping tool (1) according to claim 1.

6. The member passing portion (15) is formed in a portion of the main body (10) that protrudes from a cylindrical portion of the workpiece when the main body (10) is inserted into the workpiece. A crimping tool (1) according to claim 5.

7. The member passage portion (15) is a notch formed in the end portion opposite to the one end portion of the main body (10). A crimping tool (1) according to claim 6.

8. The member passage portion (15) is a through hole formed in the main body (10). A crimping tool (1) according to claim 6.

9. A pressure-receiving portion (18) is formed at the other end of the main body (10) opposite to the one end, and the pressure-receiving portion (18) receives a force applied from the other end toward the one end along the tool axis (LT). A crimping tool (1) according to claim 1.

10. The pressure-receiving portion (18) is a plane perpendicular to the tool axis (LT). A crimping tool (1) according to claim 9.

11. a cylindrical outer casing (101) with a bottom having a bottom plate portion (102) that is a bottom portion; A detection unit (110); a sealing member (120) sandwiched and fixed between the outer casing (101) and the detection unit (110); Equipped with The detection unit (110) includes a detection unit casing (111), an annular stator structure (113) disposed inside the detection unit casing (111), and a rotating shaft (112) rotatably disposed in the detection unit casing (111) and protruding from the inside of the annular stator structure (113) beyond one end of the detection unit casing (111) toward the outside of the detection unit casing (111). and The sealing member (120) has a sealing through hole (120a) formed therein, An outer shaft hole (102a) is formed in the bottom plate portion (102), The detection unit (110) is disposed inside the outer casing (101) with the rotating shaft (112) inserted into the sealing through-hole (120a) and the outer shaft hole (102a), A deformation portion (104) is formed on the inner periphery of the outer casing (101), At least a part of the deformed portion (104) is formed with one or more crimped portions (104a) that are plastically deformed in a direction toward the inside of the outer casing (101), Each of the crimping portions (104a) presses an end of the detection portion (110) to fix the detection portion (110) inside the outer casing (101). A resolver unit (100).

12. A crimping tool (1) according to claim 1; a cylindrical outer casing (101) with a bottom plate (102); A detection unit (110); a sealing member (120); A preparation step (S01) of preparing the above; an arrangement step (S02) of arranging the sealing member (120), the detection unit (110), and the crimping tool (1) inside the outer casing (101) in the order of the sealing member (120), the detection unit (110), and the crimping tool (1) toward the bottom plate portion (102); a crimping step (S03) in which, after the placing step (S02), a force along the direction of the tool axis (LT) is applied to the crimping tool (1), causing the crimping tool (1) to deform a deformed portion (104) formed on the inner periphery of the outer casing (101); Equipped with In the crimping step (S03), the processed portion (11) is pressed against at least a portion of the deformed portion (104), and at least a portion of the deformed portion (104) is plastically deformed in a direction toward the tool axis line (LT), thereby forming a crimped portion (104a) in at least a portion of the deformed portion (104), and the outer casing (101) and the detection portion (110) are fixed to each other by the crimped portion (104a). A method for manufacturing a resolver unit (100).

13. In the arranging step (S02), when the sealing member (120), the detection unit (110), and the crimping tool (1) are arranged inside the outer casing (101), the boundary line (12) of the crimping tool (1) is fitted into an inner peripheral groove (101d) formed on the inner circumference of the outer casing (101), In the crimping step (S03), the boundary line (12) advances toward the bottom of the inner circumferential groove (101d), and the crimped portion (104a) is formed. A method for manufacturing a resolver unit (100) according to claim 12.

14. The detection unit (110) has a detection unit casing (111), an annular stator structure (113) arranged inside the detection unit casing (111), and a rotation shaft (112) protruding from inside the stator structure (113) beyond one end of the detection unit casing (111) toward the outside of the detection unit casing (111), In the disposing step (S02), before disposing the detection unit (110) inside the outer casing (101), an adhesive (140) is applied to at least one of the outer peripheral surface of the detection unit casing (111) and the inner peripheral surface of the outer casing (101), which face each other. A method for manufacturing a resolver unit (100) according to claim 12.

15. In the crimping step (S03), the crimped portion (104a) is formed, and the outer casing (101) and the detection unit (110) are fixed to each other, and then the adhesive (140) is hardened. A method for manufacturing a resolver unit (100) according to claim 14.

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