JPH0487733A - Device for manufacturing propeller shaft - Google Patents

Abstract

PURPOSE:To improve dimensional accuracy of a propeller shaft by holding press-in force of an inner cylinder member into an outer cylinder member at a fixed value based on a detection signal of a press-in force detecting sensor arranged between a press-in means and a supporting means of the inner cylinder member. CONSTITUTION:A load cell 43 is fixed to a supporting plate 41 in an end part of a rod 27a, protruded from a hydraulic cylinder 27, and a pin 31 is inserted to a yoke mounting hole 29, insertion formed in a supporting shaft 46 connected to the other end part of the load cell 43, to support a yoke 33 as an inner cylinder supporting means through the pin 31. When press-in force of the rod 27a is excessively applied, a change of specific resistance of the load cell 43 is transmitted to a control unit 47 through a signal line 43a, and a signal of stopping action of a pressure regulating valve 49 is output from the control unit 47 through an output line 47a to hold press-in force of an inner cylinder member 3 into an outer cylinder member 1 at a fixed value.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention comprises a substantially cylindrical elastic member interposed between an outer cylinder and an inner cylinder inserted coaxially from both ends of the outer cylinder. The present invention relates to a propeller shaft manufacturing device.

As is well known in the art, various types of propeller shafts are available for transmitting, for example, the driving force of an automobile engine from a transmission to a final reduction gear. The publication discloses the configuration of a propeller shaft 10 shown in FIG. 13. This propeller shaft 10 includes an outer cylinder member 1 having a relatively large diameter, an inner cylinder member 3 made of metal that is inserted through the outer cylinder member 1 in an axial direction, and an outer wall surface 4 of the inner cylinder member 3 which is vulcanized in advance. Elastic members 7, 7--, such as rubber, are bonded and press-fitted into the space 5 between the inner cylinder member 3 and the outer cylinder member 1, respectively. The elastic members 7,7, . Reference numerals 9 and 9 designate metal ball yokes connected to both left and right ends of the outer cylinder member 1 and the inner cylinder member 3.

By using such a propeller shaft 10, during the rotation of the propeller shaft 10 for transmitting the driving force of the engine, the torsional vibration characteristics of the propeller shaft 10 are improved due to elastic deformation of the elastic members 7, 7, etc. can improve vibration-proofing and sound-proofing properties.

FIG. 10 shows an example of an apparatus for manufacturing the above-mentioned propeller shaft 10, in which a press-fit jig mounting plate 15 is fixed to approximately the middle part of a pair of support rods 13a13b bridging and supporting a pair of left and right plates 11a and llb. A handle 19 is provided at the outer end of the screw shaft 17 screwed into one plate 11b, and a pin 23 is inserted into a yoke hole mounting 21 formed through the screw shaft 17 near the inside end. A yoke 25 is supported via the yoke 25. and the yoke 2
The above-mentioned outer cylinder member 1 is sandwiched and supported between the press-fitting jig mounting plate 15 and the press-fitting jig mounting plate 15.

A cylinder 27 is provided on the other plate Ila, and a rod 27a protruding from the cylinder 27 extends in the direction of the press-fit jig mounting plate 15.
A yoke 33 is supported via a pin 31 inserted through a yoke attachment hole 29 formed near the end of a.

Reference numeral 3 denotes an inner cylinder member, and elastic members 7, 7, etc. made of rubber or the like are vulcanized and bonded in advance to the outer wall surface of the inner cylinder member 3.
The press-fitting jig is press-fitted into the inside of the outer cylinder member 1 from the wide-diameter side of the tapered hole 15a opened in the press-fitting jig mounting plate 15. Further, a pair of press-fit size adjustment bolts 37 and 37 are screwed into the vicinity of the edge of a positioning plate 35 integrally projecting from the wood 27a.
The tip portions 37a, 37a of 7.37 are in contact with the surface of the press-fitting jig mounting plate 15.

According to this manufacturing apparatus, when manufacturing a propeller shaft, first, the outer cylinder member 1 is sandwiched between the yoke 25 and the press-fit jig plate 15, and the opening of the outer cylinder member I is opened by operating the handle 9. The end portion is supported in a pressed state by the press-fitting jig mounting plate 15. Next, in advance, an elastic member 7.7, such as rubber, etc.
is vulcanized and bonded to the inner cylinder member 3 from the wide diameter side of the hole 15a toward the inside of the outer cylinder member 1, and the pair of press-fit size adjustment bolts 37 are inserted based on the operation of the cylinder 27. The tips 37a and 37a of ゜37 are the press-fit jig mounting plate 1
By extending the rod 27a until it comes into contact with the surface of the rod 5, the pressure of the rod 27a is applied to the inner cylinder member 3 through the yoke 33, and the inner cylinder member 3 enters the outer cylinder member 1 by a predetermined distance. The engineering work was completed.

Problems to be Solved by the Invention However, in such a propeller shaft manufacturing apparatus, there is a problem that it is difficult to maintain a constant pressing force and holding force of the inner cylinder member 3 into the outer cylinder member 1. was there.

That is, in the case of the above example, the press-fit dimension adjustment bolt 37.37
Since the rod 27a is extended until the tip portions 37a, 37a of the rod 27a come into contact with the surface of the press-fit jig mounting plate 15,
If the pressing force of the rod 27a is too large, the 11th
As shown in the figure, the press force P gradually increases with the passage of time t, and when it reaches the holding pressure area a, the press force P exceeds the allowable deformation limit pressure 21 of the yoke 33, and the rod 27
There is a risk that the yoke 33 will be deformed by the pin 31 inserted through the rod 27a and a splice will occur.On the other hand, if the pressing force of the rod 27a is too small, the holding pressure will be reduced as shown in FIG. The pressing force P when reaching the region a does not increase sufficiently, and therefore the amount of penetration of the inner cylinder member 3 into the outer cylinder member l becomes insufficient, resulting in a decrease in the dimensional accuracy of the obtained propeller shaft. In addition, in such a manufacturing device, the amount of press-fitting of the inner cylinder member 3 can be made constant by the size adjustment port 37, but when the total length of the outer cylinder member 1 varies, the total length of the propeller shaft also varies. Difficulties arise.

Therefore, the present invention solves the problems that the conventional vehicle propeller shaft manufacturing apparatus has, and maintains the pressing force and holding force of the inner cylinder member into the outer cylinder member at a constant value. It is an object of the present invention to provide a manufacturing apparatus that can improve the dimensional accuracy of a propeller shaft manufactured by the present invention.

Means for Solving the Problems In order to achieve the above object, the present invention includes an outer cylinder support means for supporting an outer cylinder member of a propeller shaft, and an outer cylinder support means whose outer peripheral surface is in advance pressed against the inner peripheral surface of the outer cylinder member. an inner cylinder support means for supporting an inner cylinder member in which a cylindrical elastic member is disposed at a position where it can enter into the outer cylinder member; In a propeller shaft manufacturing apparatus comprising a press-fitting means for advancing inward in the axial direction, and a positioning means for determining an entry position of the inner cylinder member with respect to the outer cylinder member, first, according to claim 1, the press-fitting means A pressure force detection sensor for detecting the pressure and holding force of the press fit means is disposed between the means and the support means for the inner cylinder member, and the operation of the press fit means is performed based on the detection signal of the pressure force detection sensor. This is the configuration of a propeller shaft manufacturing apparatus equipped with a control means for adjusting the.

Further, according to a second aspect of the present invention, a predetermined space in the axial direction is secured between the press-fitting means for the inner cylinder member and the positioning means for determining the entry position of the inner cylinder member when the inner cylinder member is press-fitted. A spacer is detachably arranged to measure the static spring constant of the propeller shaft depending on the presence or absence of the spacer. This configuration includes a deflection amount detection sensor that measures the amount of deflection in the axial direction of the propeller shaft.

Further, according to a fourth aspect of the present invention, positioning plates are provided as the positioning means on the outer cylinder member and the inner cylinder member located near both ends of the propeller shaft in the axial direction, and between the two positioning plates, there is provided a positioning plate for the positioning means when the inner cylinder member is press-fitted. A propeller shaft manufacturing device is provided that is equipped with a press-fit dimension adjustment bolt for regulating the overall length of the propeller shaft.

According to the structure of claim 1, the pressure and holding force of the press-fitting means are detected by the press-force detection sensor disposed between the press-fitting means and the support means for the inner cylinder member, and the pressure and holding force of the press-fitting means are detected. Based on the detection signal of the sensor, the control unit outputs a signal that adjusts the operation of the press-fitting means, so the pressing force of the inner cylinder member into the outer cylinder member is maintained constant based on this output signal. . Therefore, the dimensional accuracy of the obtained propeller shaft can be improved by eliminating the habit of having the pressing force become excessive or, conversely, being too small.

Further, according to the second aspect of the present invention, when the inner cylinder member is completely inserted into the outer cylinder member, the tip of the press-fit dimension adjusting bolt comes into contact with the spacer and stops. By inputting and reading the change in the load applied to the load cell when the press-fitting means is driven again after it has been pulled out to the outside, the resulting axial static spring constant of the propeller shaft can be measured. .

Furthermore, according to the configuration of claim 3, the change in the load applied to the load cell is input to and read by the control unit as in the above example, and at the same time, the amount of deflection in the axial direction of the propeller shaft is read by the deflection amount detection sensor. , the axial spring constant when the load on the propeller shaft read by the load cell is at a specific value is calculated as the value divided by the difference in the amount of deflection of the propeller shaft when each load is applied.

Further, according to the configuration of claim 4, it becomes possible to accurately regulate the length between the positioning plates located near both axial ends of the propeller shaft by the press-fit dimension adjustment bolt, and the length between the outer cylinder member and the inner cylinder can be adjusted accurately. Even if there are variations in the overall length of the members, the overall length of the resulting propeller shaft remains constant.

Embodiments Hereinafter, various embodiments of the apparatus for manufacturing a propeller shaft for a vehicle according to the present invention will be described in detail, with the same reference numerals assigned to the same components as those of the conventional structure.

FIG. 1 shows a first embodiment of the present invention.
A and Ilb are a pair of plates arranged at portions separated by a certain length, and these plates 11a and Ilb are bridged and supported by a pair of support rods 13a and 13b. A press-fitting jig mounting plate 15 is fixed approximately in the middle of the support rods 13a and 13b, and one of the plates ll
A handle 19 is attached to the outer end of the screw shaft 17 screwed into b.
A yoke 25 serving as an outer cylinder support means is supported through a pin 23 inserted into a yoke mounting hole 21 formed through the screw shaft 17 near the inner end thereof. The outer cylinder member 1 is sandwiched and supported between the yoke 25 and the press-fitting jig mounting plate 15.

A hydraulic cylinder 27 is provided on the other plate lla as a means for press-fitting the inner cylinder, and this hydraulic cylinder 27
The rod 27a protruding from the press-fit jig mounting plate 15
A load cell 43 serving as a press force detection sensor is fixed to a support plate 41 extending in the direction and integrally formed at the end of the rod 27a with a pin 45.45. A support shaft 46 is connected to the other end of the load cell 43, and a pin 31 is inserted into a yoke mounting hole 29 formed through the support shaft 46, and is used as an inner cylinder support means through this pin 31. A yoke 33 is supported. Therefore, the load cell 43 is supported between the support plate 41 and the support shaft 46, in other words, between the press-fitting means of the inner cylinder and the support means.

3 is an inner cylindrical member, and elastic members 7, 7, etc., such as rubber, are vulcanized and bonded to the outer wall surface of the inner cylindrical member 3,
One open end of the inner cylinder member 3 is inserted into a tapered hole 15g opened in the press-fitting jig mounting plate 15 from the wide diameter side.

Furthermore, a positioning plate 35 is provided on the support shaft 46 and protrudes parallel to the press-fit jig mounting plate 15, and a similar positioning plate 39 is integrally provided near the pin 23 of the other screw shaft 17. A pair of press-fit size adjustment bolts 37 and 37 are provided protrudingly from the plate 39 and screwed into the vicinity of the edge of the plate 39.
The press-fit size adjustment bolts 37.37 extend toward the plate 35 side, with their tip portions 37a, 37a in contact with the surface of the positioning plate 35 on the other side. That is, the press-fit size adjustment bolts 37, 37 constitute positioning means for determining the insertion position of the inner cylinder member 3.

A signal line 43a derived from the load cell 43 is input to a control unit 47, and the control unit 4
The output line 47a of No. 7 is input to the pressure regulating valve 49. 51 is a hydraulic unit; this hydraulic unit 51
Hydraulic fluid is supplied to and discharged from the hydraulic cylinder 27 via the pressure regulating valve 49.

The load cell 43 described above has a characteristic that the specific resistance of the load cell 43 changes depending on the pressure when it is pressed between the support plate 41 and the support shaft 46 based on the extension of the rod 27a. cylinder 27 due to the change in
The magnitude of the pressing force is detected and transmitted to the control unit 47. Therefore, as the load cell 43, a so-called strain sensor whose resistance value changes in response to external stress can be used.

According to the first embodiment, when manufacturing a propeller shaft, the outer cylinder member 1 is sandwiched between the yoke 25 and the press-fitting jig mounting plate 15, and the open end of the outer cylinder member 1 is inserted by operating the handle 19. is pressed and supported on one side surface of the press-fitting jig mounting plate 15.

Next, the open end of the inner cylindrical member 3, to which the elastic members 7, 7, etc., such as rubber, have been vulcanized and bonded in advance, is attached to the press-fit jig mounting plate 15.
Insert it inward into the outer cylinder member 1 from the wide diameter side of the hole 15a.

Next, the hydraulic unit 51 is started, and the hydraulic unit 51
By supplying the hydraulic fluid obtained from the above to the cylinder 27 through the pressure regulating valve 49, the rod 27a expands based on the operation of the cylinder 27, and the entry of the inner cylinder member 3 into the outer cylinder member 1 is prevented. will be started.

During such an operation, the pressing force of the rod 27a is applied to the load cell 43, which is fixed between the support plate 41 and the support shaft 46, which are integrally formed on the rod 27a. When an excessive pressure force is applied, the change in the specific resistance of the load cell 43 is transmitted to the control unit 47 via the signal line 43a, and the control unit 47 stops the operation of the pressure regulating valve 49 via the output line 47a. A signal is output. Therefore, based on the output signal from the control unit 47, the pressing force of the inner cylinder member 3 into the outer cylinder member 1 can be kept constant.

In addition, the press-fit dimension adjustment pole (37) as a positioning means
．． 37 regulates the maximum permissible limit of entry of the inner cylinder member 3, and functions as a stopper against excessive external force.

According to this first embodiment, as shown in FIG. 2, the press force P of the rod 27a gradually increases with the passage of time, and even when the pressure holding area a is reached, the press force P increases. The deformation allowable limit pressure P1 of the yoke 33 is below. Therefore, the pin 31 inserted into the rod 27a allows the yoke 33 to
The rod 27a is not deformed and shakes, and there is no fear that the pressing force of the rod 27a is too small.
The dimensional accuracy of the obtained propeller shaft can be improved.

FIG. 3 shows a second embodiment of the present invention, the basic configuration of which is the same as that of the first embodiment, and is designated by the same reference numerals. This second embodiment relates to a device that can easily measure the static spring constant of the obtained propeller shaft.

In the case of the second embodiment, the positioning plate 35 in the first embodiment is eliminated, and the tip portions 37a, 3 of the press-fit dimension adjustment bolts 37.37 serve as positioning means.
7a is extended to the vicinity of the support plate 41 driven by the hydraulic cylinder 27, which is a press-fitting means, and furthermore, a spacer 53 is removably attached between the tip 37a of the press-fit dimension adjustment bolt 37 on one side and the support plate 41. It is arranged. 55 is a cylinder device for attaching and detaching the spacer 53.

According to the second embodiment, when the inner cylindrical member 3 is completely inserted into the outer cylindrical member 1 as in the first embodiment, the tip 37a of one of the press-fit dimension adjustment bolts 37 hits the spacer 53. Stop when touching. Next, the drive of the hydraulic cylinder 27 is temporarily stopped, the cylinder device 55 is operated to remove the spacer 53 outward, and then the hydraulic cylinder 27 is driven again to remove the rod 2.
7a is extended.

By inputting and reading the change in the load applied to the load cell 43 at this time to the control unit 47, the obtained axial static spring constant of the propeller shaft can be measured.

FIG. 4 is a graph showing the correlation between the load (Kg/f) applied to the propeller shaft and the amount of deflection (mu), and the amount of deflection a is determined by the thickness of the spacer 53.

In addition to the above axial static spring constant, -load (Kg/f
)/deflection (mm); therefore, by measuring the maximum load when the deflection a changes from 0 to a, the axial static spring constant is K, -b/a ( Kgf/mm).

Further, by setting the thickness of the spacer 53 to 1 mm, the static spring constant can be determined to be 8 by reading the maximum load value with the load cell 43.

Therefore, according to this second embodiment, after the inner cylinder member 3 is press-fitted into the outer cylinder member 1, it is not necessary to remove the obtained propeller shaft from the press-fitting device and measure it with another measuring device, and it is not necessary to measure the propeller shaft over time. This provides the effect that measurement errors in the static spring constant due to changes are prevented.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, in addition to the spacer 53 used in the second embodiment, a A potentiometer 59 is provided with a detection rod 57 made of a conductor that protrudes from the surface, and detects the movement of the detection rod 57 as a change in electrical resistance.
This is a configuration with . The detection rod 57 and the potentiometer 59 constitute a deflection amount detection sensor 61 in the axial direction of the propeller shaft.

In the case of this embodiment, the first. In place of the handle 19 of the second embodiment, an electric jack 20 is used to enable automatic operation.

According to the third embodiment, as described in the second embodiment, when the inner cylinder member 3 is completely inserted into the outer cylinder member 1, the tip end 37a of one of the press-fit dimension adjustment bolts 37 is aligned with the spacer 5.
3 and stopped, the drive of the hydraulic cylinder 27 is temporarily stopped, and the cylinder device 55 is activated to remove the spacer 53 outward, and then the hydraulic cylinder 27 is driven again to extend the rod 27a. At this time, the change in the load applied to the load cell 43 is input to the control unit 47 and read, and at the same time, the deflection amount detection sensor 61 consisting of the detection rod 57 and the potentiometer 59 detects the amount of deflection in the axial direction of the propeller shaft (mm). ) is read.

In this example, the load (Kg/f
) is between b1 and b2, the axial spring constant is the value divided by the difference a2-al (11ff+) in the amount of deflection of the propeller shaft when each load is applied, that is, 1 = ( bz b+)/(a2-a+)(lcgf/
mm).

Note that it is also possible to use a laser micro, a magnescale, etc. in place of the potentiometer 59, and by using these, the measurement accuracy can be further improved. Furthermore, in the case of this embodiment, the spring constant in the axial direction can be measured even without the spacer 53.

FIG. 7 shows a fourth embodiment of the present invention, and in this embodiment, the rod 27a explained in FIG.
A pair of press-fit dimension adjustment bolts 37.37 screwed together near the edge of the positioning plate 35 integrally protruding from the
After the middle part of the pair of press-fit size adjustment bolts 37'37' screwed into the positioning plate 39 protruding from the screw shaft 17 is passed through the inside of the press-fit jig mounting plate 15. , the other ends 37c, 37c are abutted against the surface of a positioning plate 35 provided protrudingly from the support shaft 47.

According to the fourth embodiment, the press-fit dimension adjustment bolt 37
' 37 ' makes it possible to accurately regulate the length between the positioning plates 35 and 39 located near both axial ends of the propeller shaft. Even if W) varies from component to component, the overall length of the resulting propeller shaft remains constant.

FIG. 8 shows a modification of the fourth embodiment, in which an end portion 37c of the press-fit dimension adjusting bolt 37' on the positioning plate 35 side has a 9 As shown in the figure, a press-fit dimension adjustment jig 37d is attached using a ball plunger 38 or the like.

By preparing various press-fit dimension adjusting jigs 37d with different lengths and replacing them as appropriate, the press-fit dimension can be adjusted with one touch without the need to tighten bolts.

Effects of the Invention As is clear from the above explanation, according to the vehicle propeller shaft manufacturing apparatus according to the present invention, the press force provided between the press-fitting means for the inner cylinder member and the support means for the inner cylinder member is The pressure and holding force of the press-fitting means are detected by the detection sensor, and the operation of the press-fitting means is adjusted based on the detection signal of this press-fitting detection sensor, so that the pressure and holding force of the inner cylinder member into the outer cylinder member are reduced. This makes it possible to maintain a constant value, thereby eliminating the habit of having the pressing force become excessive or, conversely, being too small, thereby increasing the dimensional accuracy of the resulting propeller shaft.

Further, according to the structure of claim 2, when the inner cylinder member is inserted into the outer cylinder member, the tip of the press-fit dimension adjusting bolt comes into contact with the spacer and stops, so that the spacer is first moved outward. By inputting and reading the change in the load applied to the load cell when the load cell is removed and the press-fitting means is driven again, the obtained axial static spring constant of the propeller shaft can be measured. Therefore, there is no need to once remove the obtained propeller shaft from the press-fitting device and measure it with another measuring device, and there is an effect that measurement errors in the static spring constant due to changes over time are prevented.

Furthermore, according to the configuration of claim 3, the change in the load applied to the load cell is input to and read by the control unit as in the above example, and at the same time, the amount of deflection in the axial direction of the propeller shaft is read by the deflection amount detection sensor. The spring constant in the axial direction when the load on the propeller shaft read by the load cell is at a specific value can be determined as the value divided by the difference in the amount of deflection of the propeller shaft when each load is applied.

Further, according to the configuration of claim 4, it becomes possible to accurately regulate the length between the positioning plates located near both axial ends of the propeller shaft by the press-fit dimension adjustment bolt, and the length between the outer cylinder member and the inner cylinder can be adjusted accurately. Even if there are variations in the overall length of the members from part to part, the effect that the overall length of the obtained propeller shaft is constant is exhibited.

[Brief explanation of drawings]

FIG. 1 is a sectional view of essential parts showing a first embodiment of a vehicle propeller shaft manufacturing apparatus according to the present invention, FIG. 2 is a graph showing the operation of the present invention, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a graph showing the same effect, FIG. 5 is a cross-sectional view of the main part showing the third embodiment of the present invention, FIG. 6 is a graph showing the same effect, and FIG. 7 is a graph showing the same effect. FIG. 8 is a sectional view of a main part showing a modification of the fourth embodiment of the invention, FIG. 9 is an enlarged view of part A in FIG. 8, and FIG. Cross-sectional views of main parts showing an example of conventional manufacturing equipment, FIGS. 11 and 12
The figure is a graph showing the operation of the conventional example, and FIG. 13 is a sectional view of a main part showing an example of a conventional propeller shaft. DESCRIPTION OF SYMBOLS 1... Outer cylinder member, 3... Inner cylinder member, 7... Elastic member, 11a, 1lb-... Plate, 13a, 13b-... Support rod, 15... Press-fit jig mounting plate, 15g...Tapered hole portion, 17...Screw shaft, 19.
... Handle, 25.33... Yoke (supporting means),
27... Hydraulic cylinder (press fitting means), 35.39...
・Plate (for positioning), 37.37'... Press-fit dimension adjustment bolt (positioning means), 38... Ball plunger, 41... Support plate, 43... Load cell,
46... Support shaft, 47... Control unit, 53...
・Spacer, 57...Detection rod, 59...Potentiometer, 61...Deflection amount detection sensor, Fig. 8 Fig. 9

Claims (4)

[Claims] (1) an outer cylinder support means for supporting the outer cylinder member of the propeller shaft; and an inner cylinder member, on the outer peripheral surface of which a substantially cylindrical elastic member that is pressed against the inner peripheral surface of the outer cylinder member is arranged in advance; an inner cylinder support means for supporting the inner cylinder member at a position where it can enter into the outer cylinder member; a press-fitting means for advancing the inner cylinder member in the axial direction from the open end of the outer cylinder member toward the inside of the outer cylinder member; A propeller shaft manufacturing apparatus comprising positioning means for determining the entry position of the inner cylinder member with respect to the cylinder member, wherein a pressure of the press-fitting means and a holding force are provided between the press-fitting means and the support means for the inner cylinder member. What is claimed is: 1. A propeller shaft manufacturing apparatus comprising: a press-in force detection sensor for detecting press-in force; and a control means for adjusting the operation of the press-fitting means based on a detection signal from the press-in force detection sensor. (2) A predetermined space in the axial direction is secured between the press-fitting means for the inner cylinder member and the positioning means for determining the entry position of the inner cylinder member, and the propeller is 2. The propeller shaft manufacturing apparatus according to claim 1, further comprising a removably arranged spacer for measuring a static spring constant of the shaft. (3) The press-fitting means for the inner cylinder member is provided with a deflection amount detection sensor that measures the amount of deflection in the axial direction of the propeller shaft from the movement of the press-fitting means when the inner cylinder is press-fitted. The propeller shaft manufacturing device described above. (4) an outer cylinder support means for supporting the outer cylinder member of the propeller shaft; and an inner cylinder member, on the outer peripheral surface of which a substantially cylindrical elastic member that is pressed against the inner peripheral surface of the outer cylinder member is arranged in advance; an inner cylinder support means for supporting the inner cylinder member at a position where it can enter into the outer cylinder member; a press-fitting means for advancing the inner cylinder member in the axial direction from the open end of the outer cylinder member toward the inside of the outer cylinder member; A propeller shaft manufacturing apparatus comprising a positioning means for determining an entry position of an inner cylinder member with respect to a cylinder member, wherein the positioning means includes a positioning means for determining an entry position of an inner cylinder member with respect to a cylinder member, wherein the positioning means includes a positioning means for determining an entry position of an inner cylinder member with respect to a cylinder member. 1. An apparatus for manufacturing a propeller shaft, characterized in that a positioning plate is provided, and a press-fit dimension adjustment bolt is provided between both positioning plates for regulating the total length of the propeller shaft when an inner cylinder member is press-fitted.