JP6413547B2 - Manufacturing method of fixed structure, manufacturing method of rotating body, rotating body, and motor - Google Patents

Description

The present invention relates to a method for producing a fixed structure, a method of manufacturing a rotary member, rotating rotary body, and to a motor.

  Conventionally, as a means for fixing a member to be fixed to a fixing member, a protruding portion formed on the fixing member is inserted into a through portion provided in the fixed member, and the tip of the protruding portion protruding from the through portion is heat-treated. There is a means (so-called heat caulking) for forming and fixing a flange portion for retaining by deforming in a direction perpendicular to the protrusion while heating with a tool (for example, Patent Document 1 (FIG. 2) and Patent Document 2 (FIG. 5)). reference).

JP2013-240251A JP 2011-223710 A

  However, in the above-described heat caulking, particularly when the heating time by the heating jig is short, heat is not transmitted to the entire protruding portion, and the tip portion of the protruding portion is deformed to form a flange portion, There is a problem that the fixed member is likely to rattle in the direction perpendicular to the protruding portion of the protruding portion without filling the gap between the inner surface of the through-hole of the fixed member and the protruding portion facing each other.

The present invention was made to solve the above problems, its object is a method for producing a fixed structure that can suppress rattling, a method of manufacturing a rotary member, rotating rotary body, and a motor Is to provide.

The manufacturing method of the rotating body that solves the above-described problem is such that a protruding portion formed on a resin-made rotating fixing member is inserted into a through portion provided in a sensor magnet member, and a tip portion of the protruding portion that protrudes from the through portion A rotating body manufacturing method in which the sensor magnet member is fixed to the rotating fixing member by heat caulking to form a flange portion for preventing slippage by deforming in a direction orthogonal to the protrusion while heating with a heating jig. The jig includes a first heating portion for forming the flange portion while heating the tip of the protruding portion, and extends in a direction opposite to the protruding portion of the protruding portion and embedded in the protruding portion. And the second heating part heats the protrusion from the inside by the second heating part, and forms the flange part while heating the tip of the protrusion by the first heating part. Fever Comprising the step.

According to the method, in the heat caulking step, the projecting portion is heated from the inside by the second heating unit, and the flange portion is formed while the tip of the projecting portion is heated by the first heating unit, so that the rotation fixing member is formed. The sensor magnet member is fixed. In this way, the protrusion of the rotation fixing member is heated from the inside, so that the protrusion facing the inner surface of the penetrating portion of the sensor magnet member can easily bulge to the inner surface, and the bulging portion that has bulged Thus, the gap with the inner surface of the penetrating portion is filled, and rattling of the sensor magnet member in the bulging direction (the protruding orthogonal direction of the protruding portion) can be suppressed. In addition, since the protrusion of the rotation fixing member is heated from the inside, the tip of the protrusion is easily deformed, and the flange portion for preventing the protrusion itself protrudes greatly or is in close contact with the end surface of the sensor magnet member. Therefore, shakiness in the removal direction can be further suppressed .

In the method for manufacturing a rotating body, the protrusion is formed with a recess that is previously recessed in the anti-projection direction, and in the heat caulking step, the second heating part is inserted into the recess and the protrusion is It is preferable to heat from the inside side.

  According to this method, the protrusion is formed with a recess recessed in advance in the anti-projection direction, and in the heat caulking process, the second heating part is inserted into the recess and the protrusion is heated from the inside. Therefore, the second heating part can be embedded in the protruding part easily and in a short time compared to the case where the protruding part has no recess.

In the manufacturing method of the rotating body , in the heat caulking step, it is preferable that the second heating unit is press-fitted into the recess and the projection is heated from the inside.
According to this method, in the heat caulking step, the second heating part is press-fitted into the recess, so that the second heating part can be reliably brought into contact with the protruding part and efficiently heated from the inside.

In the manufacturing method of the rotating body , it is preferable that the concave portion is a slit formed so as to divide the tip as viewed from the protruding direction of the protruding portion.
According to this method, since the recess is a slit formed so as to divide the tip as viewed from the protruding direction of the protruding portion, for example, the divided pieces are easily bent in the protruding orthogonal direction. Therefore, for example, the bulging portion is more easily formed.

In the manufacturing method of the rotating body , it is preferable that an opening inclined surface having an opening width wider toward the opening side is formed in the recess.
According to this method, the concave portion is formed with the inclined surface of the opening that becomes wider toward the opening side, so that, for example, positioning when the second heating unit is inserted is facilitated.

In the method for manufacturing a rotating body , it is preferable that the second heating unit is formed with a tapered inclined surface that decreases in width toward the distal end side.
According to this method, the second heating unit is formed with the tapered inclined surface that becomes narrower toward the distal end side, so that, for example, positioning at the time of insertion of the second heating unit is facilitated.

In the method of manufacturing a rotating body , the length of the second heating unit is set to be greater than the depth of the recess, and in the heat caulking step, the tip of the second heating unit is bitten into the bottom of the recess. It is preferable to heat the protrusion from the inside.

According to this method, in the heat caulking step, the protrusion is heated from the inside while the tip of the second heating part bites into the bottom of the recess, so that the meat of the protrusion at the position corresponding to the bottom of the recess can escape. Bulges to the inner surface side of the penetrating portion, and the bulged portion fills a gap with the inner surface of the penetrating portion, further suppressing rattling of the sensor magnet member in the bulging direction (the direction perpendicular to the protruding portion of the protruding portion). Can do.
The manufacturing method of the fixed structure that solves the above-described problem is such that the protruding portion formed on the resin fixing member is inserted into the through portion provided in the fixed member, and the leading end portion of the protruding portion protrudes from the through portion. A fixing structure manufacturing method for fixing the fixed member to the fixing member by heat caulking to form a flange portion for retaining by deforming in a direction orthogonal to the protrusion while heating with a heating jig. The jig includes a first heating portion for forming the flange portion while heating the tip of the protruding portion, and extends in a direction opposite to the protruding portion of the protruding portion and embedded in the protruding portion. And the second heating part heats the protrusion from the inside by the second heating part, and forms the flange part while heating the tip of the protrusion by the first heating part. A heat caulking step, In the heat sinking step, the second heating portion is inserted into the recess to heat the protrusion from the inside, and the second heating is performed in the heat caulking step. The length of the part is set to be larger than the depth of the concave part, and in the heat caulking step, the protruding part is heated from the inner side while the tip of the second heating part is bitten into the bottom of the concave part.
According to the method, in the heat caulking step, the protrusion is heated from the inside by the second heating unit, and the flange is formed while the tip of the protrusion is heated by the first heating unit, so that the fixing member is covered. The fixing member is fixed. In this way, the protruding portion of the fixing member is heated from the inside, so that the protruding portion facing the inner surface of the through portion of the fixed member is likely to bulge toward the inner surface, and the bulging portion that is bulged A gap with the inner surface of the penetrating portion is filled, and rattling of the fixed member in the bulging direction (the protruding orthogonal direction of the protruding portion) can be suppressed. Further, since the protruding portion of the fixing member is heated from the inner side, the tip of the protruding portion is easily deformed, and the flange portion itself for preventing the protrusion is protruded greatly or is easily brought into close contact with the end surface of the fixed member. Therefore, shakiness in the removal direction can be further suppressed.
In addition, the protrusion is formed with a recess that is previously recessed in the anti-projection direction, and in the heat caulking process, the second heating part is inserted into the recess and the protrusion is heated from the inside. The second heating part can be embedded in the protruding part easily and in a short time compared to the case where no recess is formed.
Further, in the heat caulking step, since the protrusion is heated from the inside while the tip of the second heating part bites into the bottom of the recess, the through-hole is formed so that the meat of the protrusion corresponding to the bottom of the recess escapes. The bulging portion fills a gap with the inner surface of the penetrating portion, and it is possible to further suppress the rattling of the fixed member in the bulging direction (the protruding orthogonal direction of the protruding portion).

  In the rotating body that solves the above-described problem, a protruding portion formed on a resin-made rotating fixing member is inserted into a penetrating portion provided in the sensor magnet member, and the tip of the protruding portion protruding from the penetrating portion is heated and cured. A rotating body in which the sensor magnet member is fixed to the rotation fixing member by heat caulking that is deformed in a direction orthogonal to the protrusion while being heated by a tool to form a flange portion for retaining the protrusion. A concave portion that is recessed in the anti-projection direction for heating from the side is formed, and a bulging portion that bulges toward the inner surface is formed at a portion facing the inner surface of the penetrating portion.

  According to this configuration, the protrusion of the rotation fixing member is formed with a recess that is recessed in the anti-projection direction for heating from the inside, and at the portion facing the inner surface of the through portion of the sensor magnet member. Since the bulging part which bulges to the inner surface side is formed, the gap with the inner surface of the penetrating part is filled by the bulging part. Therefore, rattling of the sensor magnet member in the bulging direction (the direction perpendicular to the protruding portion of the protruding portion) can be suppressed.

  In the rotating body, the sensor magnet member includes a permanent magnet formed in an annular shape and a metal cover fixed so as to cover an outer peripheral surface and an end surface of the permanent magnet, It is preferable that an inwardly extending portion protruding inward from the metal cover is formed at an end portion of the protruding portion in the protruding direction.

  According to the same configuration, the sensor magnet member has an annular permanent magnet and a metal cover fixed so as to cover the outer peripheral surface and the end surface of the permanent magnet, Since an inward extending portion that protrudes inward from the metal cover is formed at an end portion in the protruding direction of the protruding portion, the bulging portion is configured to sandwich the inward extending portion with the flange portion. Therefore, shakiness in the pulling direction can be further suppressed.

A motor that solves the above problem includes at least one of the rotating body described in the paragraph [0020] and the rotating body described in the paragraph [0022] .
According to this configuration, rattling can be suppressed in the motor.

The method of manufacturing the fixed structure of the present invention, a method of manufacturing a rotary member, rotating rotary body, and the motor, it is possible to suppress rattling.

1 is a partial cross-sectional view of a motor in one embodiment. (A) is a top view of a joint. (B) is sectional drawing of a joint. (A) is a top view for demonstrating the manufacturing method of a joint. (B) is sectional drawing for demonstrating the manufacturing method of a joint. Sectional drawing for demonstrating the manufacturing method of a joint. The perspective view for demonstrating the manufacturing method of the fixed structure in another example. (A) And (b) is sectional drawing for demonstrating the manufacturing method of the fixed structure in another example. The perspective view for demonstrating the manufacturing method of the fixed structure in another example. (A) And (b) is sectional drawing for demonstrating the manufacturing method of the fixed structure in another example. (A) And (b) is sectional drawing for demonstrating the manufacturing method of the fixed structure in another example. Sectional drawing of the joint in another example.

Hereinafter, an embodiment of a motor will be described with reference to FIGS.
As shown in FIG. 1, the motor 1 of the present embodiment is a so-called geared motor including a motor main body 2 and a speed reduction unit 3 that decelerates the rotational output of the motor main body 2 and outputs a high torque.

  A yoke housing 4 (hereinafter, yoke 4) of the motor body 2 is made of a conductive metal material and is formed in a bottomed cylindrical shape. A flange 4 b is formed in the opening 4 a of the yoke 4, and the flange 4 b is connected and fixed to the fixing portion 6 a of the gear housing 6 of the speed reduction portion 3 with a bolt B.

  A brush holder 5 made of an insulating material such as a synthetic resin is assembled to the opening 4a of the yoke 4 so as to close the opening 4a. When the yoke 4 and the gear housing 6 are connected and fixed by the bolt B, the brush holder 5 is fixedly held between the flange 4 b of the yoke 4 and the fixing portion 6 a of the gear housing 6.

  A plurality of magnets MG are arranged and fixed on the inner surface of the yoke 4 so as to face each other. An armature (rotor) 7 is rotatably accommodated inside the opposing magnets MG. A bearing 9 a is provided at the inner bottom of the yoke 4 to rotatably support the base end of the rotary shaft 8 fixed to the armature 7. Further, a bearing 9 b is attached at the center position of the brush holder 5 so as to rotatably support the tip of the rotating shaft 8 protruding into the gear housing 6.

  The brush holder 5 holds a pair of power supply brushes 5a. Each brush 5a is in sliding contact with the segment SG of the commutator 7a provided in the armature 7, and supplies current to the segment SG. Further, the brush holder 5 has a connector portion 5b that can be connected to an external connector (not shown), and current from the external connector is supplied to the brush 5a via a terminal 5c provided in the connector portion 5b. It has become.

  The speed reduction unit 3 includes a gear housing 6 and a speed reduction mechanism 11 accommodated in the gear housing 6. In the gear housing 6, the joint receiving portion 12 is formed in the fixed portion 6 a fixed to the yoke 4 so as to open to the yoke 4 side. The gear housing 6 includes a worm shaft housing portion 13 extending from the joint housing portion 12 in the direction opposite to the yoke 4 along the axis L direction of the rotary shaft 8, and a side of the worm shaft housing portion 13 (downward in FIG. 1). And a wheel accommodating portion 14 formed on the inner surface.

  Inside the joint housing portion 12, a fixed structure and a rotating body that connect the distal end portion 8 a of the rotating shaft 8 penetrating the brush holder 5 and the base end portion 15 a of the worm shaft 15 housed in the worm shaft housing portion 13. The joint 16 is accommodated.

  The worm shaft 15 is arranged coaxially with the rotary shaft 8 and is pivotally supported by a bearing 17 a provided in the gear housing 6 on the base end portion 15 a side connected to the joint 16. The tip of the worm shaft 15 is pivotally supported by a bearing 17b provided in the worm shaft accommodating portion 13, and a screw tooth is provided at an axial intermediate portion of the worm shaft 15 (a portion between the bearings 17a and 17b). A worm portion 15b is formed. A thrust receiving plate 17c for receiving the thrust load of the worm shaft 15 is provided at the bottom in the axial direction of the worm shaft accommodating portion 13.

  The internal space of the worm shaft housing portion 13 is connected to the internal space of the wheel housing portion 14. A disc-shaped worm wheel 18 that meshes with the worm portion 15b is rotatably accommodated in the wheel accommodating portion 14. The rotation axis of the worm wheel 18 is parallel to the direction perpendicular to the axis of the worm shaft 15 (the direction perpendicular to the paper surface in FIG. 1), and the worm wheel 18 and the worm shaft 15 constitute the speed reduction mechanism 11. At the center of the worm wheel 18 in the radial direction, an output shaft (not shown) extending along the axial direction of the worm wheel 18 (the depth direction in FIG. 1) is provided so as to be able to rotate integrally with the worm wheel 18. The tip of the output shaft protrudes from the wheel housing portion 14 so that the rotation of the output shaft can be output.

  Here, as shown in FIGS. 2A and 2B, the joint 16 of the present embodiment is fixed to the joint body 21 and the joint body 21 as a resin-made fixing member and a rotation fixing member. It has a sensor magnet member 22 as a fixed member.

  Specifically, the sensor magnet member 22 has a permanent magnet 23 formed in an annular shape and a metal cover 24 fixed so as to cover the outer peripheral surface and one end surface of the permanent magnet 23. A through-hole 22a penetrating in the axial direction is formed on the inner peripheral surface of the sensor magnet member 22 (permanent magnet 23 and metal cover 24) in a shape recessed in an arc shape radially outward when viewed from the axial direction. ing. A pair of penetrating portions 22a of the present embodiment are formed at intervals of 180 °.

  The joint body 21 has a disc part 21b in which a base insertion part 21a into which the base end part 15a of the worm shaft 15 is inserted so as not to rotate is formed, and extends in a cylindrical shape from the center of one end surface of the disc part 21b. And a cylindrical portion 21d formed with a fitting insertion portion 21c into which the tip end portion 8a of the rotating shaft 8 is non-rotatably fitted. And the protrusion part 21e is formed in the outer peripheral surface of the cylindrical part 21d by which the sensor magnet member 22 is externally fitted, Comprising: The penetration part 22a is penetrated by the axial direction in the position corresponding to a pair of penetration part 22a. Has been. Then, the tip portion of the protruding portion 21e protruding from the through portion 22a is deformed in the protruding orthogonal direction by heat caulking to form the flange portion 21f (by being sandwiched between the disc portion 21b and the flange portion 21f). A sensor magnet member 22 is fixed to the main body 21. In addition, the protrusion 21e is formed with a recess 21g that is recessed in the anti-projection direction for heating from the inside, and a portion facing the inner surface of the through-hole 22a is formed by a heat caulking process described later. A bulging portion 21h bulging on the inner surface side is formed.

Next, the manufacturing method of the joint 16 comprised as mentioned above is demonstrated.
As shown in FIG. 3B and FIG. 4, the method for manufacturing the joint 16 includes a “heat-caulking step” in which heat caulking is performed using a heating jig 31.

  First, as shown in FIGS. 3A and 3B, the protruding portion 21e (before the heat caulking step) does not have the flange portion 21f described above, and extends along the axial direction. And the recessed part 21g previously recessed by the anti-projection direction is formed in the protrusion part 21e. The concave portion 21g is formed with an opening inclined surface 21j that widens the opening width toward the opening side. Note that the opening inclined surface 21j of the present embodiment is uniformly inclined from the bottom of the recess 21g to the opening end.

  The heating jig 31 extends in the anti-projection direction of the first protrusion 31a to form the flange 21f while heating the tip of the protrusion 21e, and is embedded in the protrusion 21e. A second heating part 31b that is inserted into the concave part 21g and heats the protruding part 21e from the inside. The second heating unit 31b is formed with a tapered inclined surface 31c that decreases in width toward the distal end side. In addition, the taper inclined surface 31c of this embodiment is formed so as to be uniformly inclined from the proximal end to the distal end.

  Then, as shown in FIG. 4, in the “heat caulking step”, the second heating part 31 b is inserted into the recess 21 g, and the protrusion 21 e is heated from the inside by the second heating part 31 b, and the first heating is performed. The flange portion 21f is formed by deforming the tip end while heating the tip end of the protruding portion 21e by the portion 31a. At this time, the protruding portion 21e is heated from the inner side, so that the protruding portion 21e facing the inner surface of the penetrating portion 22a of the sensor magnet member 22 easily bulges to the inner surface side, and the bulging portion 21h is formed. The

Next, the operation of the motor 1 configured as described above will be described.
When the armature 7 is rotationally driven and the worm shaft 15 is rotationally driven together with the rotational shaft 8, the rotational force is decelerated and transmitted to the worm wheel 18 engaged with the worm shaft 15, and the output shaft rotates together with the worm wheel 18. To do. At this time, the joint 16 rotates integrally with the rotary shaft 8 and the worm shaft 15, and the magnetic force of the sensor magnet member 22 is detected by a rotation detection element Ra (for example, a Hall IC) disposed in the joint housing portion 12. . The rotation detection element Ra outputs a signal based on a change in the magnetic pole of the sensor magnet member 22 due to rotation to a control device (not shown), and the control device calculates the rotation direction, rotation speed, rotation amount, and rotation position of the rotation shaft 8. Then, control is performed as appropriate.

Next, the characteristic effects of the above embodiment will be described below.
(1) In the “heat-caulking process”, the protrusion 21e is heated from the inside by the second heating part 31b, and the flange part 21f is formed while the tip of the protrusion 21e is heated by the first heating part 31a. A sensor magnet member 22 is fixed to the joint body 21. In this way, the protrusion 21e is heated from the inner side, so that the protrusion 21e facing the inner surface of the penetrating portion 22a of the sensor magnet member 22 easily bulges toward the inner surface, and the bulged portion that bulges out. The gap between the inner surface of the penetrating portion 22a is filled with 21h, and rattling of the sensor magnet member 22 in the bulging direction (the protruding orthogonal direction of the protruding portion 21e) can be suppressed. Further, the protrusion 21e is heated from the inside, so that the tip of the protrusion 21e is also easily deformed, and the flange portion 21f itself for preventing the protrusion is protruded greatly or is in close contact with the end surface of the sensor magnet member 22. Therefore, shakiness in the removal direction can be further suppressed. Therefore, for example, noise during driving of the motor 1 can be reduced. Further, for example, the detection by the rotation detection element Ra can be made highly accurate.

  (2) The protrusion 21e is formed with a recess 21g that is recessed in the anti-projection direction in advance, and in the “heat caulking step”, the second heating part 31b is inserted into the recess 21g and the protrusion 21e is located on the inner side. Therefore, the second heating part 31b can be embedded in the protruding part 21e easily and in a shorter time than that in which the recessed part 21g is not formed in the protruding part 21e.

(3) Since the opening inclined surface 21j that widens the opening width toward the opening side is formed in the recess 21g, for example, positioning when the second heating unit 31b is inserted becomes easy.
(4) The second heating unit 31b is formed with a tapered inclined surface 31c that decreases in width toward the distal end side. Therefore, for example, positioning when the second heating unit 31b is inserted is facilitated.

The above embodiment may be modified as follows.
In the above embodiment, although not particularly mentioned, in the “heat caulking step”, the second heating unit may be pressed into the recess. That is, it is good also as a recessed part and a 2nd heating part which do not require a pressure when inserting, and it is good also as a recessed part and a 2nd heating part which require a pressure when inserting.

  For example, you may change as shown in FIG.5, FIG.6 (a) and FIG.6 (b). In this example, a manufacturing method of the fixing structure 43 that fixes the fixed member 42 to the fixing member 41 will be described. First, the fixed member 42 is formed in an annular shape, and the entire center hole constitutes a through portion 42a. The fixing member 41 has a projecting portion 41b erected from the base portion 41a. As shown in FIGS. 5 and 6A, the projecting portion 41b before the heat caulking step is previously recessed in the anti-projecting direction. A provided recess 41c is formed. The concave portion 41c in this example is a slit formed so as to divide the tip as viewed from the protruding direction of the protruding portion 41b.

  The heating jig 44 used in this example has a first heating part 44a for forming the flange part 41d (see FIG. 6B) while heating the tip of the protruding part 41b, and a reaction between the protruding part 41b. And a second heating part 44b that extends in the protruding direction and is embedded in the protruding part 41b (inserted into the concave part 41c) to heat the protruding part 41b from the inside. The second heating unit 44b is formed with a tapered inclined surface 44c that decreases in width toward the distal end side. The tapered inclined surface 44c in this example is formed to be uniformly inclined from the proximal end to the distal end. And the width | variety of the base end side of the 2nd heating part 44b (tapered inclined surface 44c) is set larger than the width | variety of the opening of the said recessed part 41c (before a heat caulking process).

  Then, as shown in FIG. 6B, in the “heat-caulking step”, first, the second heating part 44b is inserted into the recess 41c, and the protruding part 41b is heated from the inside by the second heating part 44b. The flange portion 41d is formed by deforming the tip while heating the tip of the protruding portion 41b by the first heating portion 44a. At this time, the protrusion 41b is heated from the inner side, so that the protrusion 41b facing the inner surface of the through-hole 42a of the fixed member 42 is easily bulged toward the inner surface, and a bulging portion 41e is formed. . Thereby, shakiness of the to-be-fixed member 42 of a bulging direction (projection orthogonal direction of the protrusion part 41b) can be suppressed.

  Further, in this example, when the second heating part 44b is inserted into the recess 41c, the second heating part 44b is press-fitted into the recess 41c, so that the second heating part 44b is securely inserted into the protrusion 41b (recess 41c). Can be efficiently heated from the inner side.

  Moreover, in this example, since the recessed part 41c is a slit formed so that the front-end | tip may be divided | segmented seeing from the protrusion direction of the protrusion part 41b, the divided | segmented piece becomes easy to bend in a protrusion orthogonal direction, for example. Therefore, for example, the bulging portion 41e is more easily formed.

-You may change the shape of above-mentioned recessed part 21g, 41c and the 2nd heating parts 31b and 44b into another shape.
For example, you may change as shown in FIG.7, FIG.8 (a) and FIG.8 (b). In this example, unlike the other examples (see FIGS. 5 and 6), first, the entire recessed portion 41f is formed as an opening inclined surface 41g that increases the opening width toward the opening side, and is recessed in a conical shape. Further, the second heating section 44d has a tapered inclined surface 44e whose width is narrowed toward the distal end side, and is convexly provided in a conical shape whose height is lower than the depth of the concave portion 41f.

  Even in this case, the bulging portion 41h (see FIG. 8B) is formed together with the flange portion 41d by the “thermal caulking step” similar to the above, and the bulging direction (the protruding orthogonal direction of the protruding portion 41b) is formed. Shaking of the fixed member 42 can be suppressed.

  Also, for example, as shown in FIG. 9A and FIG. In this example, unlike the above-described another example, first, the recess 41j has a depth m, and the length h of the second heating unit 44f is set to be greater than the depth m of the recess 41j. In addition, a conical tapered inclined surface 44e is formed at the distal end of the second heating unit 44f in this example so that the width decreases toward the distal end.

  In the “heat-caulking step” in this example, the protruding portion 41b is heated from the inside while the tip of the second heating portion 44f is biting into the bottom of the recess 41j. If it does in this way, it will bulge to the inner surface side of penetration part 42a so that flesh of projection part 41b of the position corresponding to the bottom of crevice 41j may escape, and the crevice between the inner surface of penetration part 42a is filled up by the bulging part 41k. Further, rattling of the fixed member 42 in the bulging direction (the direction perpendicular to the protrusion 41b) can be further suppressed.

  -In above-mentioned embodiment, although the recessed part 21g recessed in the anti-projection direction previously was formed in the protrusion part 21e, it is not limited to this, As a protrusion part in which the recessed part is not formed, a heat caulking process The second heating part may be embedded while forming the recess.

  In the above embodiment, the penetrating portion 22a of the sensor magnet member 22 composed of the permanent magnet 23 and the metal cover 24 has a shape having substantially no step on the inner surface, but is not limited to this. As shown in FIG. 10, an inwardly extending portion 24 a that protrudes inward from the metal cover 24 may be formed at the protruding direction side end portion of the protruding portion 21 e in the through portion 22 a. If it does in this way, it will become the structure which the said bulging part 21h contact | abuts the inwardly extending part 24a with the said flange part 21f without gap. Therefore, it is possible to further suppress the rattling of the sensor magnet member 22 in the removal direction.

  In the above embodiment, the manufacturing method of the joint 16 as the fixed structure and the rotating body is described, but the manufacturing method of the fixed structure that does not rotate may be used. Moreover, it is good also as a manufacturing method of the other fixed structure and rotary body in the motor 1, and you may implement as a manufacturing method of the fixed structure body and rotary body in things other than the motor 1. FIG.

  16 ... Joint (fixed structure and rotating body), 21 ... Joint body (fixing member and rotating fixed member), 21e, 41b ... Projection, 21f, 41d ... Flange, 21g, 41c, 41f, 41j ... Recess, 21h , 41e, 41h, 41k ... bulging portion, 21j, 41g ... inclined surface of opening, 22 ... sensor magnet member (fixed member), 22a, 42a ... penetrating portion, 23 ... permanent magnet, 24 ... metal cover, 24a ... inside Extension part 31, 44 ... heating jig, 31a, 44a ... first heating part, 31b, 44b, 44d, 44f ... second heating part, 31c, 44c, 44e ... tapered inclined surface, 41 ... fixing member, 42 ... Fixed member, 43 ... fixed structure, h ... length, m ... depth.

Claims (11)

A protruding portion formed on a resin-made rotation fixing member is inserted into a through portion provided in the sensor magnet member, and the tip of the protruding portion protruding from the through portion is heated with a heating jig in a direction perpendicular to the protruding direction. A method of manufacturing a rotating body that fixes the sensor magnet member to the rotating fixing member by heat caulking to deform and form a flange portion for retaining,
The heating jig includes a first heating part for forming the flange part while heating a tip of the protruding part, and extends in a direction opposite to the protruding part of the protruding part and embedded in the protruding part. A second heating unit for heating from the inside side,
A rotation characterized by comprising a heat caulking step in which the protrusion is heated from the inside by the second heating part and the flange is formed while heating the tip of the protrusion by the first heating part. Body manufacturing method. In the manufacturing method of the rotating body according to claim 1,
The protrusion is formed with a recess that is previously recessed in the anti-projection direction,
In the thermal caulking process, the manufacturing method of the rotary member, characterized by heating the protruding portion by inserting the second heating portion into the recess from the inner side. In the manufacturing method of the rotating body according to claim 2,
In the thermal caulking process, the manufacturing method of the rotary member, characterized by heating the protruding portion by press-fitting the second heating portion into the recess from the inner side. In the manufacturing method of the rotating body according to claim 3,
The method of manufacturing a rotating body , wherein the concave portion is a slit formed so as to divide a tip as viewed from a protruding direction of the protruding portion. In the manufacturing method of the rotating body according to any one of claims 2 to 4,
A manufacturing method of a rotating body , wherein an opening inclined surface having an opening width wider toward the opening side is formed in the recess. In the manufacturing method of the rotating body according to any one of claims 2 to 5,
The method of manufacturing a rotating body , wherein the second heating unit is formed with a tapered inclined surface that decreases in width toward the tip side. In the manufacturing method of the rotating body according to any one of claims 2 to 6,
The length of the second heating unit is set larger than the depth of the recess,
In the thermal caulking process, the manufacturing method of the rotary member, characterized by heating the protruding portion while bite the tip of the second heating portion on the bottom of the recess from the inner side. A protruding portion formed on a resin-made fixing member is inserted into a through-hole provided in the fixed member, and the tip of the protruding portion protruding from the through-portion is deformed in the orthogonal direction while being heated with a heating jig. A method for manufacturing a fixing structure that fixes the fixed member to the fixing member by heat caulking to form a flange portion for retaining the fixing,
The heating jig includes a first heating part for forming the flange part while heating a tip of the protruding part, and extends in a direction opposite to the protruding part of the protruding part and embedded in the protruding part. A second heating unit for heating from the inside side,
Heating the protrusion from the inner side by the second heating unit, and heat staking to form the flange while heating the tip of the protrusion by the first heating unit,
The protrusion is formed with a recess that is previously recessed in the anti-projection direction,
In the heat caulking step, the second heating part is inserted into the recess to heat the protrusion from the inside,
The length of the second heating unit is set larger than the depth of the recess,
In the heat caulking step, the protrusion is heated from the inside while the tip of the second heating unit is bitten into the bottom of the recess. A protruding portion formed on a resin-made rotation fixing member is inserted into a through portion provided in the sensor magnet member, and the tip of the protruding portion protruding from the through portion is heated with a heating jig in a direction perpendicular to the protruding direction. A rotating body in which the sensor magnet member is fixed to the rotation fixing member by heat caulking to deform and form a flange portion for retaining the deformation,
The protrusion is formed with a recess recessed in the anti-projection direction for heating from the inside, and a bulge that bulges toward the inner surface is formed at a portion facing the inner surface of the penetrating portion. A rotating body characterized by being made. The rotating body according to claim 9 ,
The sensor magnet member has a ring-shaped permanent magnet and a metal cover fixed so as to cover the outer peripheral surface and the end surface of the permanent magnet,
The rotating body according to claim 1, wherein an inwardly extending portion projecting inward from the metal cover is formed at an end portion of the projecting portion in the penetrating portion on the projecting direction side. Rotating body according to 請 Motomeko 9, and a motor, characterized in that it comprises at least one of the rotary body according to claim 10.