JP2016160950A - Assembling method of camshaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling method of a camshaft which can fix a shaft main body to a correct position even if the shaft main body is fixed to a cam assembling device via a connecting member which is arranged at one end.SOLUTION: In a first process, a connecting member 12 attached at one end of a shaft main body 11 is covered with an adapter 30, and a jig 40 is engaged with the shaft face main body 11 and the adapter 30 in a state that the shaft main body 11 is fit into a V-shaped groove of a shaft adjusting table 42, and the adapter 30 is fit into a V-shaped groove of an adapter adjusting table 48. In a second state, the adapter 30 is fixed to the connecting member 12 in a state that the shaft main body 11 and the adapter 30 are engaged with the jig 40. In a third process, the jig 40 is released from the shaft main body 11 to which the adapter 30 is fixed, and the shaft main body 11 is fixed to a shaft fixing part in a state that the adapter 30 is fit into a V-shaped groove of the shaft fixing part of a cam assembling device.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a camshaft assembling method.

As a camshaft used for an internal combustion engine or the like, a camshaft in which a cam piece having a cam crest and a shaft main body are configured as separate members is known.
As a method for assembling such a camshaft, a method described in Patent Document 1 is known. In this assembly method, first, the end of the shaft main body is fixed to a shaft fixing portion (for example, a chuck) of the cam assembling apparatus, and the cam piece is fixed to a fixing base of the cam assembling apparatus. This cam assembling apparatus has a structure capable of rotating and moving the shaft body about its central axis or linearly moving in the extending direction of the central axis. Then, the relative position between the shaft body and the cam piece is adjusted to an appropriate position by moving the shaft body to a predetermined position while inserting it into the mounting hole of the cam piece. At this position, the cam piece is fixed to the shaft body.

  When such an assembling method is employed, in order to fix the cam piece at a correct position with high accuracy, the fixing position of the shaft body with respect to the cam assembling apparatus needs to be the correct position. In the assembling method described in Patent Document 1, when fixing the shaft main body to the cam assembling apparatus, one end of the shaft main body is supported by the support section of the cam assembling apparatus, and the other end of the shaft main body is the shaft fixing section. Fixed to. As a result, the shaft body is fixed with the positions of both ends of the shaft body fixed, so that the shaft body is positioned in the correct position as compared with the case where the shaft body is fixed with only the position of one end determined. It becomes possible to fix.

JP-A-8-155567

  Devices such as a sprocket around which a timing chain is wound and a variable valve mechanism are attached to the camshaft. And the connection member used for attachment of such an apparatus may be attached to one end of the camshaft.

  When assembling such a camshaft, it is conceivable to fix the shaft body to the cam assembling device by fixing the connecting member to the shaft fixing portion of the cam assembling device. However, in a camshaft with a structure in which a connecting member is attached to the shaft body, there is an error in the attachment position of the connecting member with respect to the shaft body. There is a risk of shifting from the position. In this case, the cam piece cannot be accurately attached at the correct position.

  The present invention has been made in view of such circumstances, and its purpose is to position the shaft main body in the correct position even when the shaft main body is fixed to the cam assembling device via a connecting member provided at one end. An object of the present invention is to provide a camshaft assembling method that can be fixed to the camshaft.

  In the camshaft assembling method for achieving the above object, a cam piece having a cam crest is assembled to a shaft main body having a connecting member attached to one end and an outer surface extending in a circular cross section. In this assembling method, the adapter is placed on the connecting member and fixed, and the shaft body is fixed through the adapter, and the adapter is positioned with the outer surface of the adapter as a reference surface. The cam piece is assembled to the shaft main body using a cam assembling apparatus including a shaft fixing portion having a V-shaped groove. In the assembling method, the shaft adjustment base having a V-shaped groove for positioning the shaft body with the outer surface of the shaft body as a reference surface, and positioning of the adapter with the outer surface of the adapter as a reference surface. The adapter is fixed to the connection member using a jig provided with an adapter adjustment base having a V-shaped groove for performing. In the assembling method, the adapter is put on the connecting member, the shaft main body is fitted in the V-shaped groove of the shaft adjusting table, and the V-shaped groove of the adapter adjusting table is inserted in the V-shaped groove. A first step of engaging the shaft main body and the adapter with the jig while the adapter is fitted is included. The assembly method includes a second step of fixing the adapter to the connection member in a state where the shaft body and the adapter are engaged with the jig. Further, in the assembling method, the shaft main body to which the adapter is fixed is removed from the jig, and the shaft main body is used as the shaft fixing portion in a state where the adapter is fitted in a V-shaped groove of the shaft fixing portion. A third step of fixing is included.

  According to the above assembling method, when the adapter is fixed to the connecting member attached to the shaft main body, the shaft main body having the outer surface as the reference surface is fitted by fitting the shaft main body into the V-shaped groove of the shaft adjusting base of the jig. Can be aligned. Moreover, the adapter can be aligned with the outer surface as a reference surface by fitting the adapter into the V-shaped groove of the adapter adjustment base of the jig. Then, by fixing the adapter to the shaft body in such a state where the shaft body and the adapter are aligned with each other, the adapter mounting position is adjusted with the outer surface of the shaft body as the reference surface, and the adapter is fixed. It can be performed. Thereby, the adapter fixed to the connection member can be accurately fixed at a desired relative position with respect to the shaft body without being affected by an error in attaching the connection member to the shaft body. Then, the adapter is fixed to the shaft fixing portion in a state where the adapter is fitted in the V-shaped groove of the shaft fixing portion of the cam assembling apparatus, so that the outer surface of the adapter fixed on the basis of the outer surface of the shaft body is used as a reference. The adapter and the shaft main body can be fixed to the shaft fixing portion. Therefore, according to the above assembling method, although the shaft body is fixed to the cam assembling device through the connecting member provided at one end of the shaft body when the camshaft is assembled, it is not caused by an attachment error of the connecting member, The shaft body can be fixed in the correct position.

The perspective view of the camshaft to which the assembly method of one Embodiment is applied. The side view of the cam assembly apparatus used for the assembly of the cam shaft. (A) And (b) is a side view of an adapter. The disassembled perspective view of the jig | tool used for attachment of an adapter. The side view of the jig | tool of the state which engaged the shaft main body and the adapter. Sectional drawing which shows the cross-section along 6-6 line of FIG. 5 of a jig | tool. The side view of the jig | tool seen from the arrow 7 direction of FIG. Sectional drawing which shows the cross-section of the shaft fixing | fixed part of a cam assembly apparatus. The flowchart which shows the work procedure at the time of fixing a shaft main body to the shaft fixing | fixed part of a cam assembly apparatus.

Hereinafter, an embodiment of a camshaft assembling method will be described.
As shown in FIG. 1, the camshaft 10 includes a cylindrical shaft body. A substantially cylindrical connecting member 12 is attached to one end of the shaft body 11. The camshaft 10 has a structure to which a variable valve mechanism (not shown) is attached via the connecting member 12. The camshaft 10 includes a plurality (eight in this example) of cam pieces 13 having cam peaks. These cam pieces 13 have a through-hole 14 having a circular cross section through which the shaft body 11 is inserted. In the present embodiment, each cam piece 13 is assembled to the shaft body 11 by shrink fitting.

Hereinafter, the procedure for assembling the cam piece 13 to the shaft body 11 will be described.
Here, first, a cam assembling apparatus used for assembling the cam piece 13 will be described.

  As shown in FIG. 2, the cam assembly device 20 has a shaft fixing portion 21 to which one end of the shaft main body 11 is fixed. The end of the shaft body 11 on the side of the connecting member 12 is fixed to the shaft fixing portion 21. The specific structure of the shaft fixing portion 21 will be described in detail later.

  The cam assembly device 20 has a cam fixing portion 22 to which the cam piece 13 is fixed. The cam assembly device 20 has a structure in which the center axis of the shaft body 11 and the center axis of the through hole 14 (see FIG. 1) of the cam piece 13 coincide when the shaft body 11 and the cam piece 13 are fixed at the correct positions. It has become.

  The cam assembling apparatus 20 has a moving part 23 for moving the shaft fixing part 21. The moving unit 23 includes a linear moving mechanism 24 that extends along the central axis of the shaft body 11 fixed to the shaft fixing unit 21. The cam assembling apparatus 20 has a structure capable of moving the shaft fixing portion 21 in the extending direction of the central axis (vertical direction in FIG. 2) through the operation of the linear moving mechanism 24. Further, the moving unit 23 includes a rotation moving mechanism (not shown) for rotating the shaft fixing unit 21 around the central axis of the shaft body 11 fixed to the shaft fixing unit 21.

Next, the procedure for assembling the cam piece 13 to the shaft body 11 using the cam assembling apparatus 20 will be described.
First, the shaft body 11 is fixed to the shaft fixing portion 21 of the cam assembling apparatus 20, and the heated cam piece 13 is fixed to the cam fixing portion 22. Thereafter, the shaft main body 11 and the cam piece are inserted into the through hole 14 of the cam piece 13 by moving the shaft fixing portion 21 through the operation of the moving section 23 (the linear moving mechanism 24 and the rotary moving mechanism). The shaft body 11 is moved so that the relative position with respect to 13 becomes a desired position. Then, the cam piece 13 is brought into an interference fit state with respect to the shaft body 11 due to the subsequent temperature drop of the cam piece 13. Thereby, the cam piece 13 is firmly fixed to the shaft body 11. Thereafter, the operation of fixing the heated cam piece 13 to the cam fixing portion 22 and the operation of moving the shaft fixing portion 21 to which the shaft main body 11 is fixed by the moving portion 23 are repeated, and all the cam pieces 13 are moved to the shaft main body. 11 is assembled.

  Here, in the present embodiment, the shaft main body 11 is fixed to the shaft fixing portion 21 of the cam assembling apparatus 20 via the connecting member 12 attached to one end thereof. In the camshaft 10, there is an error in the attachment position of the connection member 12 with respect to the shaft body 11. Therefore, if the shaft main body 11 is simply fixed to the shaft fixing portion 21 of the cam assembling apparatus 20, the fixing position of the shaft main body 11 with respect to the shaft fixing portion 21 may be shifted from the correct position due to an attachment error of the connecting member 12. In this case, the cam piece 13 cannot be accurately attached to the correct position in the shaft body 11.

  In view of this point, in the present embodiment, the connecting member 12 is fixed by covering the adapter 30 (FIG. 2), and the shaft main body 11 is fixed to the shaft fixing portion 21 of the cam assembling apparatus 20 via the adapter 30. I am doing so.

Hereinafter, the structure of the adapter 30 will be described.
As shown in FIGS. 3A and 3B, the adapter 30 is formed in a shape extending in a substantially cylindrical shape with one opening closed. The peripheral wall 31 of the adapter 30 is formed with a communication hole 32 that connects the inside and the outside of the adapter 30 at equal angles (90 degrees in this example) around the central axis L. A female screw 35 is formed on the inner surface of each communication hole 32. A male screw 34 is provided in each communication hole 32, and this male screw 34 is screwed into a female screw 35 on the inner surface of the communication hole 32. A support portion 33 is connected to the tip of the male screw 34 on the inner surface side of the adapter 30 so as to be relatively rotatable. The support portion 33 has a shape extending along the inner surface of the adapter 30 in an arc shape in cross section. When the male screw 34 is tightened, the support portion 33 moves in a direction approaching the center axis of the adapter 30. On the other hand, by loosening the male screw 34, the support portion 33 moves in a direction away from the center axis of the adapter 30. ing. According to this adapter 30, the connection member 12 (indicated by the alternate long and short dash line in FIG. 3B) is placed inside the adapter 30, and the male screw 34 of each communication hole 32 is tightened to connect the four support portions 33. The member 12 is supported inside the adapter 30, and the adapter 30 is fixed to the connection member 12.

In the present embodiment, the adapter 30 is fixed to the shaft body 11 using a dedicated jig.
Hereinafter, a jig used for attaching the adapter 30 will be described.
As shown in FIG. 4, the jig 40 has a flat base portion 41. The base portion 41 is provided with two shaft adjustment bases 42 each having a V-shaped groove 42A (specifically, a groove whose inner surface extends in a V shape). These shaft adjustment bases 42 have the same structure as a so-called Yakuken stand. The V-shaped grooves 42A of the shaft adjustment bases 42 have the same shape, and the shaft adjustment bases 42 are arranged so that the inner surfaces of the grooves 42A extend on the same surface. Each shaft adjustment base 42 is provided with a spacer 43 and a male screw 44 standing at a position sandwiching the groove 42A. The jig 40 has two flat plates 45, and two insertion holes 46 are formed in the plates 45 at intervals.

  In this embodiment, as shown in FIGS. 5 and 6, the shaft adjustment is made in each insertion hole 46 of the plate 45 in a state where the shaft main body 11 is placed so as to fit in the V-shaped groove 42 </ b> A of each shaft adjustment base 42. The shaft main body 11 can be locked to the shaft adjusting table 42 by inserting each male screw 44 of the table 42 and screwing a nut 47 into the male screw 44.

  According to the present embodiment, when the adapter 30 is fixed to the connection member 12 attached to the shaft main body 11, the shaft main body 11 is fitted and engaged with the V-shaped groove 42 </ b> A of the shaft adjusting table 42 of the jig 40. Thus, the shaft main body 11 can be aligned with the outer surface of the shaft main body 11 as a reference surface.

  As shown in FIG. 4, an adapter adjustment base 48 having a V-shaped groove 48 </ b> A (specifically, a groove whose inner surface extends in a V shape) is provided in the base portion 41 of the jig 40. The portion 48B provided with the groove 48A in the adapter adjustment base 48 has the same structure as a so-called Yakuken stand. In a portion 48C adjacent to the portion 48B provided with the V-shaped groove 48A in the adapter adjustment base 48, spacers 49 and male screws 50 are erected at two spaced locations, respectively. The jig 40 has a flat plate 51, and two insertion holes 52 are formed in the plate 51 at intervals.

  In this embodiment, as shown in FIGS. 5 and 7, the adapter adjustment base 48 is inserted into each insertion hole 52 of the plate 51 in a state where the adapter 30 is placed in the V-shaped groove 48 </ b> A of the adapter adjustment base 48. The adapter 30 can be locked to the adapter adjusting base 48 by inserting the male screw 50 and screwing the nut 53 into the male screw 50. The V-shaped groove 48A of the adapter adjustment base 48 allows the shaft main body 11 to be locked to the shaft adjustment base 42 and the adapter 30 to be locked to the adapter adjustment base 48 in a state where the adapter 30 is put on the connection member 12. The center axis of the shaft body 11 and the center axis L of the adapter 30 coincide with each other.

  According to the present embodiment, when the adapter 30 is fixed to the connecting member 12 attached to the shaft body 11, the adapter 30 is fitted and engaged with the V-shaped groove 48 </ b> A of the adapter adjustment base 48 of the jig 40. Accordingly, the adapter 30 can be aligned with the outer surface of the adapter 30 as a reference plane. Moreover, since the jig 40 determines the positional relationship between the outer surface of the shaft main body 11 (the groove 42A of the shaft adjusting table 42) and the outer surface of the adapter 30 (the groove 48A of the adapter adjusting table 48), the adapter adjusting table By positioning the adapter 30 with 48, the adapter 30 can be positioned with the outer surface of the shaft body 11 as the reference surface.

  In this embodiment, as shown in FIGS. 5 to 7, the connecting member is engaged with the shaft main body 11 to the shaft adjustment base 42 and the adapter 30 to the adapter adjustment base 48 in this manner. 12, the adapter 30 is fixed.

  Specifically, the jig 40 is provided with a through hole 54 that extends from the bottom of the groove 42 </ b> A of the adapter adjustment base 48 to penetrate the adapter adjustment base 48 and the base portion 41. Using this through hole 54, one of the four male screws 34 provided in the adapter 30 is tightened by a tool such as a screwdriver. In addition to the insertion hole 46, the plate 51 is provided with a through hole 55. Using this through-hole 55, one of the four male threads 34 of the adapter 30 is tightened by a tool. The remaining two of the four male threads 34 of the adapter 30 are tightened by a tool using the gap between the plate 45 and the adapter adjusting base 48.

  Thus, according to the present embodiment, the adapter 30 can be fixed to the shaft body 11 in a state where the shaft body 11 and the adapter 30 are aligned. Therefore, the adapter 30 can be fixed after adjusting the mounting position of the adapter 30 with the outer surface of the shaft body 11 as a reference surface. Thereby, the adapter 30 fixed to the connecting member 12 can be accurately fixed at a desired relative position with respect to the shaft main body 11 without being affected by an attachment error of the connecting member 12 to the shaft main body 11. it can.

  Thereafter, in this embodiment, the shaft main body 11 to which the adapter 30 is fixed is removed from the jig 40, and the shaft main body 11 (specifically, the adapter 30) is connected to the shaft fixing portion of the cam assembling apparatus 20 (FIG. 2). 21 is fixed.

  As shown in FIG. 8, the shaft fixing portion 21 is integrally fixed to the cam assembling device 20 (see FIG. 2), and the movable fixing provided so as to be relatively movable with respect to the integral fixing portion 25. Part 26. The movement fixing part 26 is structured to be fastened and fixed to the integral fixing part 25 by bolts 27. The integral fixing portion 25 has a V-shaped groove 25B (specifically, a groove whose inner surface extends in a V-shape) on a mating surface 25A with the movable fixing portion 26. The groove 25 </ b> B is formed in a shape in which the shaft body 11 becomes a desired position (a position where the cam piece 13 can be assembled with high accuracy) by fitting the adapter 30. Further, the movement fixing portion 26 has a groove 26B extending in a square cross section on the mating surface 26A with the integral fixing portion 25.

  In the shaft fixing portion 21, when the integral fixing portion 25 and the movement fixing portion 26 are fastened and fixed, a space S extending in a substantially cross-sectional pentagon is formed by the groove 25B of the integral fixing portion 25 and the groove 26B of the movement fixing portion 26. The The adapter 30 is arranged in the space S.

  Then, through the bolt fastening for fixing the integral fixing portion 25 and the movable fixing portion 26, the adapter 30 is pressed toward the integral fixing portion 25 by the inner surface of the movable fixing portion 26, so that the adapter 30 is connected to the integral fixing portion 25. While being fitted in the groove 25B, the adapter 30 is fixed to the shaft fixing portion 21 in this state. Thereby, the adapter 30 and the shaft main body 11 can be fixed to the shaft fixing portion 21 while positioning the adapter 30 and the shaft main body 11.

  In this way, the adapter 30 is fixed to the shaft fixing portion 21 in a state where the adapter 30 is fitted in the V-shaped groove 25B of the shaft fixing portion 21 of the cam assembling device 20, so that the adapter is fixed with reference to the outer surface of the shaft body 11. The adapter 30 and the shaft body 11 can be fixed to the shaft fixing portion 21 with the outer surface of 30 as a reference. Further, since the adapter 30 is fixed to the shaft fixing portion 21 in a state in which the adapter 30 is fitted in the V-shaped groove 25B of the shaft fixing portion 21 of the cam assembling device 20, it is compared with a case where the adapter is fixed to the cam assembling device by a so-called chuck. And it can suppress that an error arises in the fixed position of adapter 30. FIG.

  Therefore, according to the present embodiment, when the camshaft 10 is assembled, the shaft body 11 is fixed to the cam assembling device 20 via the connection member 12 provided at one end of the shaft body 11. The shaft body 11 can be fixed at a correct position without being caused by an attachment error.

  Thereby, the central axis of the shaft main body 11 can be made to coincide with the moving direction in which the shaft fixing portion 21 moves linearly by the moving portion 23 and the rotational center where the shaft moving portion rotates. Therefore, when the cam piece 13 is assembled to the shaft main body 11, the relative position between the shaft main body 11 and the cam piece 13 can be accurately determined, and the cam piece 13 can be accurately assembled to an appropriate position. .

  In the cam assembling device 20, if the error in the fixing position of the shaft main body 11 to the shaft fixing portion 21 becomes large, the shaft main body 11 may not be properly inserted into the through hole 14 of the cam piece 13. Even in such a case, in order for the shaft body 11 to be properly inserted into the through hole 14 of the cam piece 13, the degree of diameter expansion of the through hole 14 may be increased by increasing the temperature of the cam piece 13. . However, it is desirable that the temperature of the cam piece 13 is low in order to efficiently perform the work of assembling the cam piece 13 to the shaft body 11.

  In this respect, according to the present embodiment, since the fixing position of the shaft main body 11 to the shaft fixing portion 21 of the cam assembling apparatus 20 can be accurately determined, the shaft main body 11 can be obtained without increasing the temperature of the cam piece 13 so much. The cam piece 13 can be assembled to the shaft body 11 by properly inserting the cam piece 13 into the through hole 14 of the cam piece 13. Therefore, the assembly work of the cam piece 13 to the shaft body 11 can be performed efficiently.

As described above, according to the present embodiment, the following effects can be obtained.
(1) As shown in FIG. 9, in the first step, the adapter 30 is put on the connecting member 12, and the shaft main body 11 is fitted in the V-shaped groove 42A of the shaft adjusting base 42, and the adapter adjustment is performed. The shaft body 11 and the adapter 30 are locked to the jig 40 in a state where the adapter 30 is fitted in the V-shaped groove 48 </ b> A of the base 48. In the subsequent second step, the adapter 30 is fixed to the connecting member 12 in a state where the shaft body 11 and the adapter 30 are locked to the jig 40. Further, in the subsequent third step, the shaft body 11 to which the adapter 30 is fixed is removed from the jig 40, and the adapter 30 is inserted into the V-shaped groove of the shaft fixing portion 21 (specifically, the integral fixing portion 25). The shaft main body 11 is fixed to the shaft fixing portion 21 in a state of fitting into 25B. Therefore, even when the camshaft 10 is assembled, the shaft body 11 is fixed to the cam assembling device 20 via the connection member 12 provided at one end of the shaft body 11, but without the attachment error of the connection member 12, The shaft body 11 can be fixed at a correct position.

The above embodiment may be modified as follows.
As the shape of the connection member 12 attached to one end of the shaft body 11, an arbitrary shape such as a substantially polygonal column shape can be adopted.

  The adapter 30 is not limited to a substantially cylindrical shape, and can be applied as long as a part of the outer surface extends in a circular arc shape. By fixing the adapter to the connecting member 12 in a state where the adapter is engaged with the adapter adjustment base 48 so that the arc-shaped portion of the outer surface of the adapter contacts the V-shaped groove 48A of the adapter adjustment base 48 The adapter with the outer surface of the shaft body 11 as the reference surface can be fixed.

  The assembly method of the above embodiment can also be applied to an assembly method in which the cam piece 13 is assembled to the shaft body 11 by a method other than shrink fitting. As such a method, for example, after inserting the shaft main body 11 into the through hole 14 of the cam piece 13, the cam piece 13 can be bonded and fixed to the shaft main body 11 with an adhesive. In addition, the cooled shaft main body 11 is inserted into the through hole 14 of the cam piece 13, and the cam piece 13 is fixed to the shaft main body 11 by the subsequent temperature rise of the shaft main body 11 to fix the cam piece 13. A method (so-called cold fitting) can be mentioned.

  The shape of the shaft body 11 is not limited to a cylindrical shape, and may be a columnar shape. In short, the assembling method of the above embodiment is applicable to any camshaft having a shaft body whose outer surface extends in a circular cross section.

  The shaft adjusting table 42 of the jig 40 has a certain length in the direction in which the central axis of the shaft body 11 extends (a length that allows the shaft body 11 to be positioned with the outer surface as a reference surface). If a V-shaped groove is formed, only one groove may be provided.

  DESCRIPTION OF SYMBOLS 10 ... Cam shaft, 11 ... Shaft main body, 12 ... Connection member, 13 ... Cam piece, 14 ... Through-hole, 20 ... Cam assembly apparatus, 21 ... Shaft fixing part, 22 ... Cam fixing part, 23 ... Moving part, 24 ... Straight line Movement mechanism, 25 ... integral fixing portion, 25A ... mating surface, 25B ... groove, 26 ... moving fixing portion, 26A ... mating surface, 26B ... groove, 27 ... bolt, 30 ... adapter, 31 ... peripheral wall, 32 ... communication hole, 33 ... Supporting part, 34 ... Male screw, 35 ... Female screw, 40 ... Jig, 41 ... Base part, 42 ... Shaft adjustment base, 42A ... Groove, 43 ... Spacer, 44 ... Male screw, 45 ... Plate, 46 ... Insertion hole, 47 ... Nut, 48 ... Adapter adjustment base, 48A ... Groove, 48B, 48C ... Part, 49 ... Spacer, 50 ... Male thread, 51 ... Plate, 52 ... Insertion hole, 53 ... Nut, 54,55 ... Through hole.

Claims (1)

An assembly method for assembling a camshaft by assembling a cam piece having a cam crest to a shaft body having a connecting member attached to one end and an outer surface extending in a circular cross section,
An adapter that is fixed on the connecting member, and a V-shaped groove that is a portion to which the shaft main body is fixed via the adapter and that positions the adapter with the outer surface of the adapter as a reference surface A shaft fixing portion having a cam assembly device, and assembling the cam piece to the shaft body,
A shaft adjustment base having a V-shaped groove for positioning the shaft body with the outer surface of the shaft body as a reference surface, and a V-shaped for positioning the adapter with the outer surface of the adapter as a reference surface Fixing the adapter to the connecting member using a jig provided with an adapter adjustment base having a groove,
In the state where the adapter is put on the connecting member, the shaft main body is fitted in the V-shaped groove of the shaft adjusting table, and the adapter is fitted in the V-shaped groove of the adapter adjusting table. A first step of engaging the shaft body and the adapter with the jig;
A second step of fixing the adapter to the connecting member in a state where the shaft body and the adapter are engaged with the jig;
A third step of removing the shaft main body to which the adapter is fixed from the jig and fixing the shaft main body to the shaft fixing portion in a state where the adapter is fitted in a V-shaped groove of the shaft fixing portion; Assembling method of camshaft including