JP2000283865A - Ball assembling apparatus for ball spline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an accurate ball spline by measuring an inserting input between inner and outer splines of balls selected from a ball stocker in a ball assembling apparatus, and preventing erroneous assembling of the balls. SOLUTION: The ball assembling apparatus for ball spline measures an inserting load of a ball BA to be loaded to a pushing bar 44 of an assembling mechanism 40 in the case of assembling the ball BA between an outer spline OS of a rotary shaft SA and an inner spline IS of a movable sheave SE, and decides good selected ball BA or not. Thus, in the case of correctly measuring no looseness changing substantially in a circumferential direction of the shaft SA of the splines IS, OS, or even in the case of responding to no looseness measured at the ball BA selected from the stocker, the fault can be recognized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, an outer spline provided on a rotating shaft (shaft member) integral with a fixed sheave constituting a pulley of a continuously variable transmission, and fixed by being fitted to the rotating shaft. The present invention relates to a ball assembling device for a ball spline used to form a ball spline by assembling a ball between an inner spline provided on a movable sheave (shaft fitting member) constituting a pulley together with a sheave.

[0002]

2. Description of the Related Art A plurality of outer splines are provided on a rotating shaft integral with a fixed sheave constituting a pulley of the above-described continuously variable transmission and a movable sheave fitted on the rotating shaft and constituting a pulley together with the fixed sheave. And inner splines are provided, and by assembling a plurality of balls between opposing inner and outer splines to form ball splines, the movable sheave is allowed to slide in the axial direction with respect to the rotating shaft. I have.

Conventionally, when a ball spline is formed between the rotating shaft of the above-described continuously variable transmission and the movable sheave, a plurality of reference balls are independently provided between the inner and outer splines in a ball spline play measuring apparatus. The inner and outer splines are displaced in the substantially circumferential direction of the rotating shaft, and the amount of backlash is measured. In a ball spline ball assembling device, a ball having a diameter corresponding to the amount of backlash measured by the backlash amount measuring device is measured. Was installed between the inner and outer splines.

[0004]

However, in the conventional ball assembling device for a ball spline, the amount of backlash in which the inner and outer splines are displaced substantially in the circumferential direction of the rotating shaft is not measured correctly, or the amount of backlash is measured by the backlash measuring device. Even if you select a ball that does not correspond to the measured backlash, the ball will be assembled between the inner and outer splines without recognizing this. However, there is a problem that a ball spline with low accuracy may be formed, and it has been a conventional problem to solve this problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has a ball spline ball capable of always forming a high-precision ball spline by preventing erroneous assembly of the ball. It is intended to provide an assembling device.

[0006]

According to the first aspect of the present invention, there is provided a ball stocker accommodating a plurality of types of balls having different diameters, an outer spline provided on a shaft member, and a shaft fitted on the shaft member. The inner spline provided on the fitting member is displaced in the substantially circumferential direction of the shaft member.A ball having a diameter corresponding to the amount of play is selected from the ball stocker and is selected between the outer spline of the shaft member and the inner spline of the shaft fitting member. A ball spline ball assembling apparatus having an assembling mechanism, wherein a ball selected from a ball stocker is configured to be capable of measuring an insertion force between an inner spline and an outer spline. The structure of the assembling device is used as means for solving the above-mentioned conventional problems.

According to a second aspect of the present invention, a ball stocker accommodating a plurality of types of balls having different diameters, an outer spline provided on a shaft member, and a shaft fitting member fitted on the shaft member are provided. An assembling mechanism for selecting a ball having a diameter corresponding to the amount of backlash in which the inner spline is displaced substantially in the circumferential direction of the shaft member from a ball stocker and assembling the ball between the outer spline of the shaft member and the inner spline of the shaft fitting member. In the ball spline ball assembling apparatus provided, the assembling mechanism is characterized in that an insertion force measuring means for measuring an insertion force between the inner and outer splines of a ball selected from a ball stocker is provided, The configuration of the ball assembling device for the ball spline is a means for solving the above-mentioned conventional problems.

According to a third aspect of the present invention, there is provided a ball assembling apparatus for a ball spline, comprising: a positioning jig for setting the shaft member at a predetermined portion of a work loading position into which the shaft member fitted with the shaft fitting member is loaded. The positioning jig has a function of aligning the phases of the inner and outer splines and positioning the inner and outer splines in the rotation direction, and the ball assembling device for the ball spline according to claim 4 of the present invention,
A plurality of reference balls are supplied between the outer spline provided on the shaft member and the inner spline provided on the shaft fitting member fitted on the shaft member, and the outer spline and the inner spline are substantially arranged around the shaft member. Is provided on the back process side of the ball spline play amount measuring device for measuring the play amount displaced in the direction, and the inner and outer splines measured and recorded by the play amount measuring device are displaced in the substantially circumferential direction of the shaft member. The data is read, and a ball to be assembled between the outer spline of the shaft member carried into the work carrying position and the inner spline of the shaft fitting member is selected from a ball stocker.

[0009]

In the ball assembling apparatus for a ball spline according to the first and second aspects of the present invention, when assembling the ball between the outer spline of the shaft member and the inner spline of the shaft fitting member, the inner and outer splines are formed by the shaft. When the amount of backlash displaced in the substantially circumferential direction of the member is not correctly measured, or when the ball selected from the ball stocker does not correspond to the measured amount of backlash, when the ball is inserted between the inner and outer splines Since the above problem can be recognized by measuring the load, erroneous assembling of the ball is prevented, and a ball spline with high precision is always formed.

Further, in the ball assembling apparatus for a ball spline according to the third aspect of the present invention, if the shaft member fitted with the shaft fitting member is set at a predetermined portion of the work loading position using the positioning jig, Since the phase adjustment of the inner and outer splines and the positioning of the inner and outer splines in the rotation direction are completed at the same time, these operations can be performed reliably and inexpensively, and in the ball assembling device for a ball spline according to claim 4 of the present invention, Since the measurement of the backlash of the inner and outer splines for all the shaft members and the shaft fitting members carried into the work carry-in position is performed in advance by the backlash measurement device located on the previous process side, the ball is measured based on the backlash data. Almost all the balls selected from the stocker will be inserted between the inner and outer splines with an appropriate load,
As a result, the efficiency of assembling the ball is extremely good.

[0011]

According to the ball spline ball assembling apparatus according to the first and second aspects of the present invention, since the above-described structure is employed, erroneous assembling of the ball between the inner and outer splines can be prevented. A remarkably excellent effect that a highly accurate ball spline can be formed is provided.

In the ball assembling apparatus for a ball spline according to the third aspect of the present invention, since the above-described configuration is employed, the phase adjustment of the inner and outer splines and the positioning of the inner and outer splines in the rotation direction can be performed reliably and at low cost. The ball assembling device for a ball spline according to the fourth aspect of the present invention has the above-described configuration, and therefore has an extremely excellent effect that the efficiency of assembling the ball can be improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIGS. 1 to 13 show a ball spline ball assembling apparatus according to an embodiment of the present invention and a play measuring apparatus arranged adjacent to the ball assembling apparatus. In the above, the shaft member is a rotating shaft that is integral with the fixed sheave that constitutes the pulley of the continuously variable transmission,
The case where the shaft fitting member fitted to the shaft member is a movable sheave that forms a pulley together with the fixed sheave is shown.

As shown in FIGS. 3 and 4, the ball assembling device 30 of the ball spline is disposed along the assembly line of the continuously variable transmission together with the play measuring device 10, and constitutes the continuously variable transmission. A conveyor 1 for transporting a work base B on which a primary pulley PP and a secondary pulley SP forming a pair with the primary pulley PP are arranged is mounted on both devices 10 and 3.
The workpieces pass through the workpiece loading positions 10A and 30A.

As shown in FIGS. 9 and 10, both pulleys PP and SP are rotatably mounted at a work loading position 10A of the play amount measuring device 10 located upstream of the ball assembling device 30. A lifter 11 that moves up and down in a state, and a liftable center unit 12 that supports and rotates the pulleys PP and SP raised by the lifter 11 from above.
And the detected protrusions 2a of the positioning jig 2 previously mounted on the pulleys PP and SP, respectively, and
A proximity switch 13 for stopping the rotation of P and a clamper 14 attached to the center unit 12 and capable of holding and releasing the positioning jig 2 from both sides are provided. At the same time, the two pulleys PP and SP are set to a predetermined portion at the work loading position 10A, and at the same time, the outer splines OS and the respective pulleys PP and SP provided on the respective rotation shafts SA of the pulleys PP and SP. The phase matching with the inner splines IS provided respectively on the movable sheave SE and the positioning of these splines OS and IS in the rotational direction are performed.

This play amount measuring apparatus 10 is similar to the apparatus shown in FIG.
As shown in FIG. 2, a loader 15 for transporting the pulleys PP and SP between the work loading position 10A and the play amount measuring position 10B is provided. The loader 15 includes a guide rail 15a provided between the work carry-in position 10A and the play measurement position 10B, and a work suspending portion 15b that moves along the guide rail 15a. The portion 15b is located at the work loading position 10 as described above.
After the center unit 12 that has performed the setting to the predetermined part in A rises while holding the positioning jig 2,
Hanging both pulleys PP and SP to measure backlash 10B
To be transported.

In this case, the work suspending portion 15b
A reference ball jig 16 that holds a plurality of reference balls RB for measuring the amount of backlash in which the outer spline OS of the rotating shaft SA and the inner spline IS of the movable sheave SE are displaced in a substantially circumferential direction of the rotating shaft SA is provided. It is provided. As shown in FIG. 8, the reference ball jig 16 has a cylindrical portion 16a fitted on the rotating shaft SA and a plurality of reference balls RB extending from the lower end of the cylindrical portion 16a in a skewered state. The holding shaft 16b is provided in accordance with the number of the inner and outer splines IS and OS and the interval in the circumferential direction. And this reference ball jig 16
In the stage in which the pulleys PP and SP are suspended by the work suspending portion 15b of the loader 15 and are conveyed from the work loading position 10A to the play amount measuring position 10B, the cylindrical portion 1
6a is fitted on the rotating shaft SA, and a holding shaft 16b holding a plurality of reference balls RB in a bead shape is inserted between the inner and outer splines IS and OS that have already been positioned in the rotating direction. I have.

Further, the play amount measuring position 10B of the play amount measuring device 10 for the ball spline is shown in FIG.
As shown also in FIG.
b) The lifter 17 which can move the pulleys PP and SP conveyed by b and moves down, and the center unit which supports the pulleys PP and SP lowered by the lifter 17 from above and performs centering. 18 and both pulleys P
A non-rotating clamper 19 for sandwiching and fixing each of the rotation axes SA of P and SP from both sides, and a floating plate 21 supporting each movable sheave SE via a plurality of outer peripheral clampers 20 capable of pressing each movable sheave SE from around. And three sets of opposing gauges 22 and 23 which are arranged on the floating plate 21 at different distances from the center with the center therebetween, and the floating plate 2
1 and a vibrator 25 for applying vibration to the floating plate 21. The floating plate 21 is provided with a pinion 24b attached to an output shaft 24a of the servo motor 24.
21a provided on the floating plate 21 side
Are driven to rotate.

At the play amount measurement position 10B, the rotation shafts SA of the pulleys PP and SP are fixed by the rotation preventing clamper 19, and the movable sheave SE is supported by the floating plate 21, and then the lifter 17 and the center unit 18 are supported. Is separated from both pulleys PP and SP, and in this state, vibration is applied to the floating plate 21 from the vibrator 25 so that each movable sheave SE is adapted to the plurality of outer peripheral clampers 20 on the floating plate 21.
Floating plate 21 by servo motor 24
Is rotated by appropriately changing the torque, and the play is measured by the three sets of opposed gauges 22 and 23. The measurement data obtained by this is stored in an ID card (not shown) of the work base B. It is to be recorded.

On the other hand, at the work loading position 30A of the ball assembling device 30, as shown in FIG.
A lifter 31 is provided for vertically moving the two pulleys PP and SP carried in together with the work base B after the measurement of the play amount by zero has been completed. The lifter 31 is provided at the work carry-in position 30A. By holding the positioning jig 2 returned to both pulleys PP and SP by the clamper 34 when it is carried out of the amount measuring device 10, the positioning jig 2 is moved in the same manner as in the case of the work loading position 10 </ b> A of the play amount measuring device 10. The pulleys PP and SP are set at predetermined positions at the work loading position 30A.

As shown in FIGS. 4 and 5, the ball assembling device 30 includes a plurality of types of balls BA having different diameters.
And a ball stocker 32 that reads out measurement data recorded on the ID card of the work base B and cuts out a fixed number of balls BA having a diameter corresponding to the amount of play measured by the play amount measuring device 10. An assembling mechanism 40 for assembling the cut ball BA between the outer spline OS of each rotary shaft SA of the pulleys PP and SP and the inner spline IS of each movable sheave SE is provided. As shown in FIG. 7, a plurality of balls BA cut out from the ball stocker 32 are distributed to a primary pulley PP side and a secondary pulley SP side by a predetermined number, and a ball distribution section 33 distributes the balls BA. A shutter 34 for receiving the dropped ball BA is provided.

As shown in FIGS. 1 and 2, the assembling mechanism 40 includes a revolver 41 for loading a ball BA that falls naturally by opening the shutter 34 that receives the ball BA, and a revolver 41 for loading the ball BA. A ball checker 42 for checking the number of the balls BA, a guide 43 for moving the revolver 41 from below the ball sorting section 33 onto the inner and outer splines IS, OS of the pulleys PP, SP set at the work loading position 30A, At the same time as opening the shutter 41a of the revolver 41 moved on the inner and outer splines IS and OS, the revolver 41 is lowered and the push bar 44 is inserted between the inner and outer splines IS and OS, and the ball BA is moved between the inner and outer splines IS and OS. Insertion force for measuring the insertion load applied to the push bar 44 when inserting It has a tough 45.

In the ball spline play measuring apparatus 10 described above, when the primary pulley PP and the secondary pulley SP placed side by side on the work base B are carried into the work carry-in position 10A, first, as shown in FIG. After the lifter 11 moves up while placing the pulleys PP and SP, the center unit 12 moves down to support the pulleys PP and SP from above and rotate them.

When the proximity switch 13 detects the detected protrusion 2a of the positioning jig 2 mounted on the pulleys PP and SP, the rotation of the pulleys PP and SP is stopped.
By gripping the positioning jig 2 from both sides with the clamper 14 of the center unit 12, both the pulleys PP and SP are set to a predetermined portion at the work loading position 10A, and at the same time, the rotating shafts of the pulleys PP and SP are rotated. SA outer spline OS and each movable sheave S of both pulleys PP and SP
The phase of E is aligned with the inner spline IS and the rotational positions of these splines OS and IS are adjusted. Thereafter, the center unit 12 is raised while the positioning jig 2 is held by the clamper 14, and the positioning jig 2 is moved. Separate from both pulleys PP and SP.

Next, as shown in FIG. 11, the work suspension portion 15b of the loader 15 at the work loading position 10A.
Loads the pulleys PP and SP and transports them to the play amount measurement position 10B. At this time, as shown in FIG. 8, the cylindrical portion 16a of the reference ball jig 16 of the work suspending portion 15b is fitted on the rotating shaft SA, and the plurality of reference balls RB are held in a bead shape. The inner and outer splines IS, in which the shaft 16b has already been positioned in the rotational direction,
It is inserted between OSs.

Next, as shown in FIGS. 12 and 13, the two pulleys PP, S
The lifter 17 on which the P is placed is lowered, and the center unit 18 is lowered, so that the centering of both pulleys PP and SP is performed. After the movable sheave SE of the pulleys PP and SP is supported by the floating plate 21 via the plurality of outer peripheral clampers 20 while being fixed, the lifter 17 and the center unit 1 are supported.
8 is separated from the pulleys PP and SP, and in this state, a vibration is applied from the vibrator 25 to the floating plate 21 to adapt each movable sheave SE to the plurality of outer peripheral clampers 20 on the floating plate 21 while the servo motor 24 is used. The floating plate 21 is rotationally driven while appropriately changing the torque, and the play amount is measured by the three sets of opposed gauges 22 and 23, and the measurement data obtained thereby is recorded on an ID card (not shown) of the work base B. I do.

When the measurement of the play is completed,
The fixing of the rotation shafts SA of the pulleys PP and SP by the rotation preventing clamper 19 is released, and the fixing of the movable sheaves SE of the pulleys PP and SP by the plurality of outer peripheral clampers 20 is released, and the lifter 17 and the center unit 18 are released. Are raised by the loader 15, both pulleys PP and S
P is conveyed to the work carry-in position 10A, and subsequently, the work suspending portion 15b of the loader 15 that has released both pulleys PP and SP at the work carry-in position 10A is moved to the reference ball jig 1.
The positioning jig 2 is returned from the lowered center unit 12 to the two pulleys PP and SP which have moved to the standby position while holding the workpiece 6, and have returned to the work loading position 10A. Is transported to the next process by the conveyor 1 while being placed on the conveyor.

On the other hand, in the ball assembling device 30, when the primary pulley PP and the secondary pulley SP carried out from the play measuring device 10 are carried into the work carry-in position 30A, first, as shown in FIG. PP, SP
When the lifter 31 is lifted up while being rotatably mounted, and is conveyed out of the play amount measuring device 10, both pulleys PP and SP
By gripping the positioning jig 2 returned to the position with the clamper 34, the work loading position 10 of the play amount measuring device 10 is adjusted.
In the same manner as in the case A, the pulleys PP and SP are set to a predetermined portion at the work loading position 30A.

During this time, the ball stocker 32
As shown in FIG. 7, measurement data recorded on the ID card of the work base B is read, and a fixed number of balls BA having a diameter corresponding to the play amount measured by the play amount measuring device 10 are cut out. A predetermined number of balls are distributed to the primary pulley PP side and the secondary pulley SP side by the ball distribution unit 33 located in the vicinity.

Next, the revolver 41 of the assembling mechanism 40 into which the ball BA that falls by opening the shutter 34 that has received the sorted ball BA is loaded after the ball checker 42 confirms the number of the ball BA. As shown in FIG. 2, both pulleys PP, which are guided by the guide 43 and set at the work loading position 30A,
The SP moves to the inner and outer splines IS and OS.

Next, as shown in FIG. 1, the shutter 4 of the revolver 41 moved on the inner and outer splines IS and OS.
Simultaneously with the opening of 1a, the push bar 44 descends and inserts the ball BA between the inner and outer splines IS and OS,
At this time, the insertion load of the ball BA applied to the push bar 44 is measured by the insertion force measuring unit 45, and the quality of the selected ball BA is determined and the stroke is confirmed. Is completed.

After the push bar 44 performs the avoiding operation, the positioning jig 2 is attached to both pulleys PP and SP.
Are returned, and these pulleys PP and SP are
Is transported to the next process by the conveyor 1 while being placed on the conveyor.

As described above, in the ball spline ball assembling apparatus 30, the outer spline O of the rotary shaft SA is provided.
When assembling the ball BA between S and the inner spline IS of the movable sheave SE, the insertion force of the ball BA applied to the push bar 44 of the assembling mechanism 40 was measured by the insertion force measuring unit 45, and the selected force was selected. Since the quality of the ball BA is determined, the inner and outer splines IS,
Even if the amount of play in which the OS is displaced substantially in the circumferential direction of the rotation axis SA is not correctly measured, or if the ball BA selected from the ball stocker 32 does not correspond to the measured play, Can be recognized, so that erroneous assembling of the ball BA is prevented, and a ball spline with high precision is always formed.

In the ball spline ball assembling device 30 described above, the positioning jig 2 is used to
If P and SP are set at predetermined positions of the work loading position 30A, the phase adjustment of the inner and outer splines IS and OS and the rotation direction positioning of the inner and outer splines IS and OS are completed at the same time, so that these operations can be performed reliably and at low cost. And the ball assembling device 30 described above.
, The pulley P carried into the work carrying position 30A
The measurement of the backlash of the inner and outer splines IS and OS for all of P and SP is performed by the backlash measuring device 10 located on the pre-process side.
Is selected in advance from the ball stocker 32 based on the play data.
Are inserted between the inner and outer splines IS and OS with an appropriate load, and as a result, the efficiency of assembling the ball BA is extremely good.

In the above embodiment, the shaft member is a rotary shaft integral with the fixed sheave forming the pulley of the continuously variable transmission, and the shaft fitting member fitted on the shaft member forms the pulley together with the fixed sheave. Although the movable sheave is shown,
It is not limited to this.

The detailed structure of the ball assembling device for a ball spline according to the present invention is not limited to the above-described embodiment.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing a state in which a ball is inserted between an inner spline and an outer spline by a push bar of an assembling mechanism in an apparatus for assembling a ball spline according to an embodiment of the present invention.

FIGS. 2A and 2B are a plan view and a front view, respectively, showing a state in which a revolver of an assembling mechanism in the ball assembling apparatus shown in FIG. 1 is moved on inner and outer splines of a pulley. It is.

FIG. 3 is an explanatory view from the front showing a situation in which a ball assembling device for a ball spline according to one embodiment of the present invention is arranged along a line together with a play amount measuring device.

FIG. 4 is a plan view showing a state in which the ball assembling device of the ball spline according to the embodiment of the present invention is arranged along the line together with the play amount measuring device.

5 is an explanatory side view of the ball assembling device shown in FIG. 3;

FIG. 6 is an explanatory front view of the ball assembling apparatus shown in FIG. 3 at a work loading position;

FIG. 7 is an explanatory sectional view of a ball sorting unit of the ball assembling apparatus shown in FIG. 3;

8A is a cross-sectional explanatory view of a reference ball jig showing a main part of the play amount measuring device shown in FIG. 3, FIG. 8B is a plan explanatory view, and FIG. It is.

FIG. 9 is an explanatory side view of the play amount measuring device shown in FIG. 3;

FIGS. 10A and 10B are a plan view and a front view, respectively, of the play amount measuring device shown in FIG. 3 at a work loading position.

FIG. 11 is an explanatory view from the front showing a situation where a pulley is loaded at a work loading position in FIG. 10;

12A and 12B are an explanatory front view and an explanatory side view, respectively, of the play amount measuring device shown in FIG. 3 at a play amount measurement position.

13 is an explanatory plan view of the play amount measuring apparatus shown in FIG. 3 at a play amount measurement position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ball spline play measuring device 30 Ball spline ball assembling device 30A Work loading position 32 Ball ball stocker 40 Assembling mechanism 45 Insertion force measuring unit (insertion force measuring means) BA ball IS Internal spline OS External spline PP Primary pulley SA Rotary shaft (shaft member) SE Movable sheave (shaft fitting member) SP Secondary pulley

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideo Ishida 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Shinsuke Tsuchiya 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Inside the corporation

Claims (4)

[Claims] A ball stocker accommodating a plurality of types of balls having different diameters, an outer spline provided on a shaft member, and an inner spline provided on a shaft fitting member fitted on the shaft member are substantially formed around a circumference of the shaft member. Ball spline ball assembling device having an assembling mechanism for selecting a ball having a diameter corresponding to the amount of play displaced in the direction from a ball stocker and assembling the ball between an outer spline of a shaft member and an inner spline of a shaft fitting member. 3. The ball spline ball assembling device according to claim 1, wherein the insertion force of the ball selected from the ball stocker between the inner and outer splines can be measured. 2. A ball stocker for accommodating a plurality of types of balls having different diameters, an outer spline provided on a shaft member, and an inner spline provided on a shaft fitting member fitted on the shaft member. Ball spline ball assembling device having an assembling mechanism for selecting a ball having a diameter corresponding to the amount of play displaced in the direction from a ball stocker and assembling the ball between an outer spline of a shaft member and an inner spline of a shaft fitting member. , Wherein the assembling mechanism is provided with an insertion force measuring means for measuring an insertion force between the inner and outer splines of the ball selected from the ball stocker. 3. A positioning jig for setting said shaft member at a predetermined position of a workpiece carrying-in position into which a shaft member fitted with a shaft fitting member is carried, said positioning jig being used for phase adjustment of inner and outer splines. 3. The ball assembling device for a ball spline according to claim 1, having a function of positioning the inner and outer splines in the rotation direction. 4. A plurality of reference balls are supplied between an outer spline provided on a shaft member and an inner spline provided on a shaft fitting member fitted on the shaft member, so that the outer spline and the inner spline become shafts. The inner and outer splines measured and recorded by the backlash measuring device are provided on the subsequent process side of the backlash measuring device of the ball spline for measuring the backlash displaced in the substantially circumferential direction of the member. 4. The ball stocker according to claim 2, wherein the backlash data is read and a ball to be assembled between the outer spline of the shaft member and the inner spline of the shaft fitting member carried into the work carrying position is selected from the ball stocker. Ball spline ball assembling device.