JP4783208B2 - Nut caulking device and caulking method - Google Patents

Description

  The present invention relates to a caulking device for a nut that pushes a part of a nut screwed to a shaft member into a caulking recess of the shaft member.

  Conventionally, a rotating member (shaft member) constituting an engine, a transmission, or the like in a vehicle such as an automobile has a plurality of mounting parts such as gears and bearings incorporated therein, and after these mounting parts are incorporated into the rotating member, A nut is screw-coupled to the male thread portion of the rotating member with a predetermined tightening torque, whereby the mounting component is mounted on the rotating member. However, even if the nut is screw-coupled to the rotating member with a predetermined tightening torque, the nut may gradually loosen due to vibration or the like that occurs when the rotating member rotates. As a result, generation of noise and premature wear of the mounted parts are caused.

  Therefore, in order to prevent the nut from loosening, the nut is caulked (indented) and thereby the nut is firmly coupled to the rotating member. As a method of caulking such a nut, for example, a nut is caulked and deformed by using a pressing jig such as a caulking punch, and the two are brought into close contact with each other (screw thread contact type), or a male screw There is a method in which a groove part (crimping recess) is formed in the part in advance, a part of the nut is crimped and deformed toward the groove part using a caulking punch, and a part of the nut is interposed in the groove part (groove part interposed type), etc. is there.

In carrying out the caulking work as described above, a caulking device that constitutes a part of the manufacturing apparatus (or assembling apparatus) is used in order to improve the work efficiency and cope with mass production. As a caulking device adopting a screw thread close contact type, for example, the one described in Patent Document 1 is known, and as a caulking device adopting a groove interposition type, for example, Patent Document 2 and Patent Document 3 are known. Those described in (1) are known.
JP 2005-103648 A JP-A-7-251227 JP 10-2111530 A

  However, according to the caulking device described in Patent Document 1, it is made difficult to loosen by increasing the degree of close contact between the screw thread of the male screw part and the screw thread of the nut (female screw part). There is a problem in that the mutual coupling strength is not sufficient for application to a shaft member having a large rotational torque such as a transmission or a transmission, and high reliability cannot be obtained.

  On the other hand, according to the caulking device described in Patent Document 2 and Patent Document 3, since a part of the nut is interposed in the groove portion formed in the male screw portion, sufficient coupling strength is obtained, and therefore Although it can be applied to a shaft member having a large rotational torque, there are the following problems from the viewpoint of workability.

  In other words, the caulking device described in Patent Document 2 includes a positioning plate between the claws of the caulking claw member provided inside the work clamp, and the operator has a nut against the projection of the positioning plate. The workpiece is set and positioned so as to engage the caulking groove of the screwed shaft. Therefore, it is necessary for the operator to look into the inside of the work clamp and visually engage the protrusion and the caulking groove, and after confirming that the engagement state is good, it is necessary to set the work. There is a problem that positioning accuracy (whether or not correctly engaged) varies depending on the operator and yield is poor.

  In the caulking device described in Patent Document 3, the indexing pin provided in the caulking site detection sensor is moved along the top surface of the nut, and the proximity switch built in the sensor is turned on by the protruding operation of the indexing pin. In operation, the caulking recess is detected. Therefore, not only the configuration of the entire apparatus is complicated, but it takes time to detect the caulking part, and the caulking part detection sensor needs to be periodically disassembled to ensure the correct protruding operation of the indexing pin. There were problems such as.

  The present invention has been made in view of the above circumstances, and an object thereof is to efficiently and reliably crimp a crimped portion with a simple configuration and to couple a nut and a shaft member with sufficient coupling strength. It is an object of the present invention to provide a caulking device and a caulking method for a nut.

The nut caulking device of the present invention is a nut caulking device for pushing a part of a nut screwed to a shaft member into the caulking concave portion of the shaft member, and the shaft with a constant phase angle with respect to the caulking concave portion. A positioning member that engages with the concavo-convex portion formed on the member is provided, and a support base that supports the shaft member, and a caulking punch that is provided on the support base and pushes a part of the nut into the caulking concave portion. The shaft member is provided with the concavo-convex portion on one end side, the crimp member is provided on the other end side of the shaft member, and the shaft member is integrally provided with a flange-shaped large-diameter portion, The large-diameter portion of the shaft member is characterized in that the concavo-convex portion is provided on an end surface opposite to the caulking concave portion .

Crimping apparatus of the nut of the invention, the pre-Symbol uneven portions are a pair of concave holes formed so as to face in the radial direction of the large diameter portion, the positioning member is a pair of engagement for engaging the respective recessed hole It is a combination pin.

  The nut crimping device of the present invention is characterized by having a nut runner for screwing the nut to the shaft member.

The nut caulking method of the present invention is a nut for pushing a part of a nut screwed to a shaft member integrally provided with a flange-shaped large diameter portion into a caulking recess formed on the other end side of the shaft member. The caulking method is a positioning method in an uneven portion formed on one end side of the shaft member at a constant phase angle with respect to the caulking recess and on the end surface opposite to the caulking recess of the large diameter portion. A setting step of engaging the member and setting the shaft member on a support base; a screwing step of screwing the nut to the shaft member by a nut runner; and a portion of the nut directed toward the caulking recess by caulking punch And a caulking process for pressing and deforming.

According to the present invention, the positioning member that engages with the concavo-convex portion formed on the shaft member at a fixed phase angle with respect to the caulking recess is provided, the support base that supports the shaft member, the support base that is provided on the support base, A caulking punch that pushes a part of the nut into the recess, and an uneven portion is provided on one end of the shaft member, and a caulking recess is provided on the other end of the shaft member. The shaft member has a flange-shaped large diameter Since the concavo-convex part is provided on the end surface on the side opposite to the caulking concave part in the large-diameter part of the shaft member, the concavo-convex part of the shaft member is used as the positioning member for the support base. The caulking work by the caulking punch can be performed by engaging the shaft member and supporting the shaft member on the support base. Therefore, it is not necessary for the operator to visually determine the position of the shaft member or to provide a caulking part detection sensor. In addition, since a part of the nut is pushed and deformed with respect to the caulking recess, the coupling strength between the nut and the shaft member can be made sufficient.

According to the present invention, the concave projecting portion are a pair of concave holes formed so as to face in the radial direction of the large diameter portion, the positioning member has a pair of engaging pins to be engaged with each recessed hole, recess hole By engaging the engagement pin with the engagement pin, the rotation of the shaft member relative to the support base can be restricted.

  According to the present invention, since the nut runner for screwing the nut to the shaft member is provided, the caulking work by the caulking punch can be performed following the screw connection of the nut to the shaft member by the nut runner.

According to the present invention, a setting step of setting the large diameter portion on one end side of the shaft member on the support base, a screwing step of screwing the nut to the other end side of the shaft member by the nut runner, and a part of the nut in the caulking recess Since the nut can be securely fixed to the shaft member by performing a caulking process in which the caulking punch is pushed and deformed toward the shaft member, the shaft member positioning process (detection for detecting the caulking site) for reliably performing the caulking work Step) becomes unnecessary. Therefore, the working efficiency can be improved and the yield can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a skeleton diagram showing a continuously variable transmission, and FIG. 2 is a cross-sectional view showing a detailed structure of a pulley portion constituting the continuously variable transmission of FIG. 3 is a cross-sectional view showing the secondary shaft of FIG. 2, FIG. 4 is a view taken along the arrow A in FIG. 3, and FIG. 5 is a view taken along the arrow B in FIG.

  As shown in FIG. 1, a belt type continuously variable transmission (CVT) 10 mounted on a vehicle (not shown) such as an automobile includes a primary shaft 12 driven by an engine 11 and a parallel to the primary shaft 12. And a secondary shaft 13. Here, the primary shaft 12 and the secondary shaft 13 constitute a shaft member (rotating member) in the present invention.

  The primary shaft 12 and the secondary shaft 13 are connected to each other by a drive belt 14 so as to be able to transmit rotation to each other. The drive belt 14 is fixed by a fixed sheave 15a and a movable sheave 15b of a pulley 15 provided on the primary shaft 12. Guided and guided by a fixed sheave 16 a and a movable sheave 16 b of a pulley 16 provided on the secondary shaft 13. Then, the rotation of the primary shaft 12 is transmitted to the secondary shaft 13 via the drive belt 14, and the transmitted rotation of the secondary shaft 13 is transmitted to the left and right drive wheels 19 a, the vehicle via the speed reduction mechanism 17 and the differential mechanism 18. It is transmitted to 19b.

  The transmission ratio of the continuously variable transmission 10 is determined by the ratio of the winding diameter of the driving belt 14 to the pulley 15 and the winding diameter of the pulley 16. The winding diameter of the driving belt 14 to the pulleys 15 and 16 is The movable sheaves 15b and 16b are adjusted by arbitrarily approaching or separating from the fixed sheaves 15a and 16a, respectively. The adjustment of the winding diameter is performed by the hydraulic pressure of a hydraulic circuit having an electromagnetic valve, a hydraulic pump, or the like controlled by a controller (not shown).

  As shown in FIG. 2, the movable sheave 15b, the primary cylinder 20 and the bearing 21 are assembled and mounted in that order on the left side of the fixed sheave 15a provided in a flange shape on the right end side of the primary shaft 12 in the figure. These mounting parts are fixed to the primary shaft 12 by screwing the nut 22 to the primary shaft 12 with a predetermined tightening torque.

  The nut 22 is screw-coupled to a male screw portion 12a formed on the left end side of the primary shaft 12 in the figure, and after the nut 22 is screw-coupled with a predetermined tightening torque, the nut 22 is opposed to the male screw portion 12a in the radial direction. Part of the thin cylindrical portion 22a formed integrally with the nut 22 is interposed between the pair of caulking concave portions 23 formed as described above, thereby preventing the nut 22 from being loosened (locked). On the right side of the fixed sheave 15a in the drawing, a pair of recesses that are engaged with an engagement pin 44 in a support portion 43 of the caulking device 40 described later so as to be opposed to the pair of caulking recesses 23 in the axial direction. A hole (uneven portion) 24 is formed. A tapered portion 24 a that facilitates the engagement of the engagement pin 44 is formed at the opening of each concave hole 24.

  A movable sheave 16b, a secondary cylinder 25, a gear 26 and a bearing 27 are assembled and mounted in that order on the right side of the fixed sheave 16a provided in a flange shape on the left end side of the secondary shaft 13 in the figure. These mounting parts are fixed to the secondary shaft 13 by screwing the nut 28 to the secondary shaft 13 with a predetermined tightening torque.

  The nut 28 is screw-coupled to a male screw portion 13a formed on the right end side of the secondary shaft 13 in the drawing, and the nut 28 is screw-coupled with a predetermined tightening torque, and then opposed to the male screw portion 13a in the radial direction. A part of the thin cylindrical portion 28a formed integrally with the nut 28 is interposed between the pair of caulking concave portions 29 formed as described above, thereby preventing the nut 28 from being loosened (locked). On the left side (end surface) of the fixed sheave 16a in the drawing, the fixed sheave 16a is engaged with an engagement pin 44 in a support portion 43 of the caulking device 40 described later so as to be opposed to the pair of caulking recesses 29 in the axial direction. A pair of concave holes (uneven portions) 30 are formed. A tapered portion 30 a that facilitates the engagement of the engagement pin 44 is formed at the opening of each concave hole 30.

  Since the primary shaft 12 and the secondary shaft 13 as shaft members have substantially the same configuration, only the secondary shaft 13 shown in FIGS. 3 to 5 will be described in detail below.

  As shown in FIG. 3, a fixed sheave 16a as a flange-shaped large-diameter portion is integrally provided on one end side of the secondary shaft 13, and the diameter of the fixed sheave 16a on the lower side in FIG. A pair of bottomed recessed holes 30 having tapered portions 30a are formed so as to face each other. A first cylindrical portion 13b is further provided below the fixed sheave 16a of the secondary shaft 13 in the drawing, and this first cylindrical portion 13b is formed in a through-hole 43a in a support portion 43 of a caulking device 40 described later. It has come to be supported.

  A stepped second cylindrical portion 13c to which the above-described mounting component is mounted is provided above the fixed sheave 16a of the secondary shaft 13 in the drawing, and an upper end side of the second cylindrical portion 13c in the drawing ( A male screw portion 13a is formed on the other end side. A pair of caulking recesses 29 are formed in the male screw portion 13a so as to oppose each other in the radial direction. As shown in FIG. 5, each caulking recess 29 has an axis of the male screw portion 13a from the upper side in the figure. It extends to a substantially middle part with respect to the direction. Then, as shown in FIG. 4, the pair of recessed holes 30 and the pair of caulking recessed portions 29 are 0 ° so as to have a constant phase angle (same phase) along the circumferential direction with the secondary shaft 13 as the central axis. And 180 ° positions.

  Next, the detailed structure of the caulking device according to the present invention will be described with reference to FIGS.

  6 is a partial sectional view showing a caulking device according to an embodiment of the present invention, FIG. 7 is an enlarged sectional view showing a secondary shaft set in the caulking device in FIG. 6, and FIG. 8 is a caulking in FIG. FIG. 9A and FIG. 9B are operation explanatory views showing the operation state of the caulking mechanism in the caulking device of FIG. 6, and FIG. 10 is fixed by the caulking device of FIG. The top view which shows the crimped state of a nut is each represented.

  As shown in FIG. 6, the caulking device 40 includes a base 41 fixed so as to be substantially horizontal on the floor surface F, and is integrally provided on the base 41 and extends vertically upward in the figure. The vertical wall 42 is provided, and the base 41 and the vertical wall 42 constitute a frame. The frame of the caulking device 40 is fixed so as not to rattle on the floor surface F via four height adjustment feet 41a (only two are shown in the drawing).

  A support 43 serving as a support for supporting one end of the secondary shaft 13 is fixed to the base 41, and the support 43 is a through-hole into which the first cylindrical portion 13 b of the secondary shaft 13 is inserted. 43a and a bottomed cylindrical portion 43b that supports the outer peripheral side of the fixed sheave 16a of the secondary shaft 13. A pair of engaging pins 44 as positioning members that engage with the pair of recessed holes 30 formed in the fixed sheave 16a of the secondary shaft 13 are provided on the outer side in the radial direction of the bottom portion 43c of the cylindrical portion 43b. The engagement pins 44 are provided so as to face each other across the central axis of the cylindrical portion 43b.

  Further, the base 41 is provided with a support wall 46 for supporting the caulking mechanism 45 so as to be parallel to the vertical wall 42, and as shown in FIG. A guide rail 47 that slidably supports the caulking mechanism 45 is provided.

  As shown in FIG. 8, the caulking mechanism 45 has a U-shaped U-shaped block 48, and this U-shaped block 48 is connected to the guide rail 47 via a connection block 49, and thereby, the U-shaped block 48. The block 48 is slidable in the vertical direction in the figure. A hydraulic cylinder 50 having an operating rod 50a that is operated by the hydraulic pressure of a hydraulic circuit (not shown) is integrally provided on a first wall portion 48a on the lower end side in the figure of the U-shaped block 48, and the hydraulic cylinder 50 is operated. The rod 50a passes through the first wall portion 48a of the U-shaped block 48 as indicated by a broken line in the drawing.

  The first wall portion 51a of the L-shaped L-shaped guide 51 is fixedly provided on the distal end side (upper side in the drawing) of the operating rod 50a, and the second wall portion 51b of the L-shaped guide 51 is formed of the operating rod. The U-shaped block 48 is slidably contacted according to the operation of 50a. The first wall 51a of the L-shaped guide 51 is provided with a first punch 52 as a caulking punch, and the first punch 52 is a nut screwed to the secondary shaft 13 as indicated by a broken line in the figure. The caulking concave portion 29 can be opposed to the caulking concave portion 29 through the thin-walled cylindrical portion 28a.

  A second punch 53 as a caulking punch is provided on the second wall portion 48 b on the upper side of the U-shaped block 48 in the drawing, and the second punch 53 faces the first punch 52 with the secondary shaft 13 interposed therebetween. Are arranged. As indicated by a broken line in the drawing, the second punch 53 can be opposed to the caulking concave portion 29 from the radial direction via a thin cylindrical portion 28 a of the nut 28 screwed to the secondary shaft 13.

  Here, each punch 52, 53 and each engagement pin 44 has a constant phase angle along the circumferential direction, as in the relationship between the pair of recessed holes 30 and the pair of caulking recessed portions 29 provided in the secondary shaft 13. (Same phase) are arranged at 0 ° position and 180 ° position, respectively.

  On the upper side in FIG. 6 of the vertical wall 42, slides 54a and 54b that are slidable in the vertical direction in the figure by an electric motor (drive mechanism) (not shown) are provided. A slide block 55 is provided on each slide 54a and 54b. It is installed. The flat plate portion 55a of the slide block 55 is provided with a nut runner 56. The nut runner 56 has a servo motor portion 56a and a rotating shaft 56b, and a nut (lower end portion in the figure) is attached to the end of the rotating shaft 56b. A socket 56c that fits the size of 28 is mounted.

  Next, a caulking method by the caulking device 40 according to the embodiment of the present invention configured as described above will be described in detail.

  First, as shown in FIG. 2, the movable sheave 16 b, the secondary cylinder 25, the gear 26 and the bearing 27 are incorporated into the secondary shaft 13, and these mounting parts are temporarily fixed by the nut 28. Next, the secondary shaft 13 on which the mounting component is temporarily fixed is set on the support portion 43 of the caulking device 40 (setting step). At this time, it sets so that a pair of engagement pin 44 may be inserted with respect to a pair of recessed hole 30 formed in the fixed sheave 16a.

  Thereafter, the slides 54 a and 54 b are driven with respect to the nut 28 of the secondary shaft 13 supported by the support portion 43 to lower the nut runner 56 by a predetermined amount, and the socket 56 c is attached to the nut 28. Next, the servo motor portion 56a of the nut runner 56 is rotationally driven so as to obtain a predetermined torque, and the nut 28 is screw-coupled to the male screw portion 13a to be permanently fixed (screwing step). At this time, since each engaging pin 44 is inserted into each recessed hole 30 and engaged with the secondary shaft 13, each engaging pin 44 receives the rotational torque of the nut runner 56 and the secondary shaft 13. Rotation is regulated.

  After the nut 28 is permanently fixed to the male screw portion 13 a of the secondary shaft 13, the thin cylindrical portion 28 a of the nut 28 is crimped and deformed by the crimping mechanism 45 in a state where the secondary shaft 13 is supported by the support portion 43. At this time, the rotation of the secondary shaft 13 is restricted by the respective engagement pins 44. Therefore, as shown in FIG. 9A, each caulking concave portion 29 formed in the male screw portion 13a of the secondary shaft 13 is The first punch 52 and the second punch 53 of the caulking mechanism 45 are opposed to each other.

  When oil is supplied from a hydraulic circuit (not shown) to the cylinder chamber (not shown) of the hydraulic cylinder 50 from the state shown in FIG. 9 (a), the operating rod 50a of the hydraulic cylinder 50 is as shown in FIG. 9 (b). As a result, the first punch 52 abuts against the thin cylindrical portion 28 a of the nut 28. Thereafter, the U-shaped block 48 constituting the caulking mechanism 45 slides on the guide rail 47 in accordance with the protruding operation of the operating rod 50 a, and the second punch 53 is caused to slide on the thin cylindrical portion 28 a of the nut 28 by the sliding of the U-shaped block 48. Abut. Further, the oil liquid is continuously supplied to the hydraulic cylinder 50, whereby the thin cylindrical portions 28a provided on the nuts 28 are pushed and deformed toward the caulking concave portions 29, and as shown in FIG. A part of the cylindrical portion 28a is interposed in the caulking recess 29 (caulking process).

  Thereafter, the first punch 52 and the second punch 53 are returned to predetermined positions by discharging the oil from the cylinder chamber of the hydraulic cylinder 50 through an oil discharge valve or the like (not shown) constituting the hydraulic circuit, The secondary shaft 13 is removed from the caulking device 40.

  As described above in detail, according to the caulking device 40 in one embodiment of the present invention, the engaging pin that engages with the recessed hole 30 formed in the secondary shaft 13 at a constant phase angle with respect to the caulking recessed portion 29. 44, and includes a support part 43 that supports the secondary shaft 13, and a first punch 52 and a second punch 53 that are provided in the support part 43 and that pushes a portion of the nut 28 into the caulking recess 29, By engaging the concave hole 30 of the shaft 13 with the engaging pin 44 of the support portion 43 and supporting the secondary shaft 13 on the support portion 43, the caulking work by the first punch 52 and the second punch 53 can be performed. .

  Therefore, it is not necessary for the operator to perform positioning by rotating on the support portion 43 while visually observing the secondary shaft 13, or to separately provide a caulking part detection sensor, so that the yield can be improved and the caulking can be improved. The configuration of the apparatus can be simplified. In addition, since a part of the thin cylindrical portion 28a of the nut 28 is pushed into the caulking recess 29 and deformed, the coupling strength between the nut 28 and the secondary shaft 13 can be made sufficient.

  Furthermore, according to the caulking device 40 in one embodiment of the present invention, the recessed hole 30 is formed in the end surface of the fixed sheave 16a integrated with the secondary shaft 13, and the engaging pin 44 of the support portion 43 is engaged with the recessed hole 30. Therefore, the rotation of the secondary shaft 13 relative to the support portion 43 can be restricted.

  Further, according to the caulking device 40 according to the embodiment of the present invention, since the nut runner 56 that screw-couples the nut 28 to the secondary shaft 13 is provided, the screw run of the nut 28 to the secondary shaft 13 by the nut runner 56 is continued. The caulking work by the 1st punch 52 and the 2nd punch 53 can be performed, therefore shortening of manufacturing time etc. can be aimed at.

  Furthermore, according to the caulking method in the embodiment of the present invention, the nut 28 can be securely fixed to the secondary shaft 13 through the setting process, the screwing process, and the caulking process. This eliminates the need for a shaft member positioning step (a caulking site detecting step for detecting a caulking site) for reliably performing the above. Therefore, the working efficiency can be improved and the yield can be improved.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible in the range which does not deviate from the summary. For example, in the above-described embodiment, the caulking device 40 that performs the caulking work on the secondary shaft 13 of the continuously variable transmission 10 has been described. Also, the caulking operation can be performed by the caulking device 40.

  Moreover, in the said embodiment, although what was applied to the primary axis | shaft 12 and the secondary axis | shaft 13 of the continuously variable transmission 10 was shown as a shaft member, this invention is not restricted to this, The crimping operation | work of a nut is required The present invention can also be applied to a shaft member such as an engine camshaft or crankshaft.

  Further, in the above-described embodiment, the concave holes 30 and the caulking concave portions 29 of the secondary shaft 13 are provided so as to coincide with the axial direction of the secondary shaft 13, and each engagement of the caulking device 40 is associated with this. Although the combination pin 44 and the first punch 52 and the second punch 53 are shown, the present invention is not limited to this. For example, the concave holes 30 and the caulking concave portions 29 of the secondary shaft 13 are arranged in the circumferential direction. The engagement pins 44 of the caulking device 40, the first punch 52, and the second punch 53 may be provided correspondingly. The point is that the phases of the engagement pins 44 and the first punches 52 and the second punches 53 should coincide with the phases of the concave holes 30 and the caulking concave portions 29.

  Moreover, in the said embodiment, although the concave hole 30 of the secondary axis | shaft 13 and the engagement pin 44 of the crimping apparatus 40 corresponding to this were each shown two, this invention is shown to this. Not limited to this, one or two or more may be provided. In short, it is only necessary to be able to regulate the rotation of the shaft member set in the caulking device. For example, when two or more shaft members are provided, a larger rotational torque (nut tightening torque) may be received. become able to.

  Furthermore, in the said embodiment, although what provided the concave hole 30 which is a recessed part was shown as an uneven | corrugated | grooved part provided in the secondary axis | shaft 13, this invention is not limited to this, A projection part (convex part) as an uneven | corrugated part ) May be provided. In this case, the support base may be provided with a concave member as a positioning member.

It is a skeleton figure which shows a continuously variable transmission. It is sectional drawing which shows the detailed structure of the pulley part which comprises the continuously variable transmission of FIG. It is sectional drawing which shows the secondary axis | shaft of FIG. It is A arrow directional view of FIG. FIG. 4 is a view taken in the direction of arrow B in FIG. 3. It is a fragmentary sectional view showing a caulking device of one embodiment in the present invention. It is sectional drawing which expands and shows the secondary axis | shaft set to the crimping apparatus of FIG. It is the top view which looked at the crimping apparatus of FIG. 6 from upper direction. (A), (b) is operation | movement explanatory drawing which shows the operating state of the crimping mechanism in the crimping apparatus of FIG. It is a top view which shows the crimping state of the nut fixed by the crimping apparatus of FIG.

Explanation of symbols

12 Primary shaft (shaft member)
13 Secondary shaft (shaft member)
22, 28 Nut 22a, 28a Thin-walled cylinder (nut)
23, 29 Caulking concave part 24, 30 Concave hole (concave part)
40 Caulking device 43 Support part (support stand)
44 Engagement pin (positioning member)
52 First Punch (Caulking Punch)
53 2nd Punch (Caulking Punch)
56 Nutrunner

Claims (4)

A nut caulking device for pushing a part of a nut screwed to the shaft member into a caulking recess of the shaft member,
A positioning member that engages with the concavo-convex portion formed on the shaft member at a constant phase angle with respect to the caulking concave portion, and a support base that supports the shaft member;
A caulking punch that is provided on the support base and that pushes a part of the nut into the caulking recess;
Providing the concavo-convex part on one end side of the shaft member, providing the caulking concave part on the other end side of the shaft member ;
The shaft member is integrally provided with a flange-shaped large-diameter portion, and the large-diameter portion of the shaft member is provided with the concavo-convex portion on an end surface opposite to the caulking concave portion. Nut caulking device. 2. The nut crimping device according to claim 1 , wherein the concave and convex portions are a pair of concave holes formed so as to oppose each other in the radial direction of the large diameter portion, and the positioning member is engaged with each of the concave holes. A nut crimping device characterized by being an engaging pin. The nut crimping device according to claim 1 , further comprising a nut runner for screwing the nut to the shaft member. A nut caulking method for pushing a part of a nut screwed to a shaft member integrally provided with a flange-shaped large diameter portion into a caulking recess formed on the other end side of the shaft member,
The positioning member is engaged with a concavo-convex portion formed on one end side of the shaft member at a constant phase angle with respect to the caulking concave portion and on the side opposite to the caulking concave portion of the large diameter portion. A setting step of setting the shaft member on the support base;
A screwing step of screwing the nut to the shaft member by a nut runner;
A method of caulking a nut, comprising: a caulking step in which a portion of the nut is pushed and deformed by caulking punches toward the caulking concave portion.

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