JP2985629B2 - Spline mating socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spline-fitting socket having a hole spline shape to be spline-fitted to a shaft spline, and more particularly, to a nut for an external thread integrated with a shaft spline by an automatic tightening device. The present invention relates to a spline fitting socket suitable for being used as a detent member of a shaft spline by being fitted to the shaft spline when tightening.

[0002]

2. Description of the Related Art FIGS. 8 and 9 show an example of an automatic tightening device for automatically tightening a nut on a shaft component (work) having a shaft spline. That is, the workpiece 1 has an axial spline portion 5 formed at one end of a long main shaft 4 supported by the main body portion 2 via the bearing 3, and a ring-shaped component such as a gear at a root portion on the bearing 3 side. 6
Are inserted in advance, and the automatic tightening device executes an automatic tightening operation of the lock nut 7 for press-fixing the annular component 6.

More specifically, the work 1 is positioned and fixed to a work base 8, and a case 10 is fixed to a slide table 9 so as to face the work base 8. The case 10 has a nut socket 1 for tightening the lock nut 7.
1 and a restraining sleeve 12 for restraining the main shaft 4 of the work 1 prior to the tightening of the lock nut 7, are provided concentrically with each other.

The nut socket 11 is slidably and non-rotatably supported by a rotary sleeve 15 via a support plate 13 and a holder 14, as shown in FIG. A polygonal fitting hole 16 that can be fitted is formed. And the case 10
The rotation output of the nut runner unit 17 provided at one end of the nut is transmitted to the rotation sleeve 15 via the gears 18 and 19, so that the lock nut 7 is regulated by the nut socket 11 which rotates integrally with the rotation sleeve 15. Tightened up.

[0005] The restraining sleeve 12 is slidably supported by the case 10 and is guided by engagement of a guide rail 20 and a guide block 21. Then, the restraining sleeve 12 can be pushed down by bringing the pusher 23 driven by the cylinder 22 into contact with the guide block 21.

The shaft spline portion 5 of the main shaft 4
An adapter 24 is mounted in advance by spline fitting. As will be described later, a hexagonal head 25 of the adapter 24 has a hexagonal hole 2 at the tip end of the restraining sleeve 12.
6 are fitted.

As shown in FIG. 11, the adapter 24 has a sleeve 28 in which a hole spline portion 27 is formed,
The sleeve 28 is formed with a support 29 having a hexagonal head 25, and the sleeve 28 has a small amount of play in the axial direction and the rotation direction in advance by engaging the elongated hole 30 and the pin 31 with the support 29. I have.

Therefore, according to the structure shown in FIGS. 8 and 9, when the slide table 9 is lowered, first the restraining sleeve 1 is moved.
The distal end of the nut 2 contacts the head 25 of the adapter 24, and the nut socket 11 contacts the lock nut 7 later than that. At this time, since the nut socket 11 is slidable with respect to the rotary sleeve 15, the nut socket 11 only comes into contact with the lock nut 7 by its own weight.

After that, the nut socket 11 and the nut socket 11 are rotated together with the rotating sleeve 15 by the activation of the nut runner unit 17.
Is rotated, and the constraining sleeve 12 is
Press down. Then, as the nut socket 11 rotates, the fitting hole 16 at the tip of the nut socket 11 engages with the lock nut 7 and gradually tightens the lock nut 7. The head 25 of the adapter 24 fits into the hexagonal hole 26 at the tip of the restraining sleeve 12 while the main shaft 4 to which the adapter 24 is splined rotates.

[0010] By the engagement of the restraining sleeve 12 and the adapter 24, the rotation of the main shaft 4 is prevented and the rotation of the main shaft 4 is prevented, and the lock nut 7 is tightened to the specified torque by the nut socket 11.

Here, as shown in FIGS. 8 and 9, inside the restraining sleeve 12, another restraining shaft 33 which can be moved up and down by the operation of the cylinder 32 is provided. This is used when a lock nut tightening operation of another type of work is performed using an adapter having a smaller diameter than the adapter 24 of FIG.

Further, instead of the adapter 24, a hole spline portion which fits into the shaft spline portion 5 on the main shaft 4 side may be formed directly on the restraining sleeve 12, and the main shaft 4 may be restrained.

[0013]

When the main shaft 4 is restrained by using the adapter 24 as described above,
Not only is it necessary to manufacture a plurality of adapters 24 as dedicated jigs in advance, but also it is necessary to attach and detach the adapters 24 for each work, resulting in a rise in equipment costs and an increase in unnecessary work steps. It is not preferable.

When a hole spline is formed directly at the tip of the restraining sleeve 12 and this hole spline is fitted to the shaft spline portion 5 on the work 1 side to restrain the main shaft 4, both spline teeth are used. If they do not mesh properly, a dent is generated in the shaft spline portion 5 on the work 1 side, which causes troubles such as inability to insert when mating parts are spline-fitted to the shaft spline portion 5 in a later process. There was a fear.

The present invention has been made in view of the above-mentioned problems, and allows the shaft spline to be smoothly fitted to the mating shaft spline only by applying a fitting thrust in the axial direction so as to be fitted to the shaft spline. It is an object of the present invention to provide a spline-fitting socket having a hole spline shape that can be used.

[0016]

SUMMARY OF THE INVENTION The present invention provides a socket having a hole spline shape which is spline-fitted to a shaft spline, and has a relative rotational degree of freedom and a radial relative degree of freedom between the shaft spline and the shaft spline. A spline fitting socket that can be spline-fitted to a shaft spline by giving a fitting thrust in the axial direction after having a holding body in advance, and a socket body having spline teeth formed on an inner peripheral surface; and The complete spline teeth are formed by leaving some of the spline teeth as complete spline teeth, and cutting off other spline teeth over a predetermined length from the opening end face side of the socket body over half of the circumference of the socket body. And an eccentric inner cylindrical surface having an eccentric circular shape that partially coincides with the addendum circle, and both tooth surfaces on the opening end surface side of the socket body for each of the complete spline teeth A chamfer portion formed by chamfering the front surface, and a tapered surface formed at a step portion between spline teeth other than the complete spline teeth and the eccentric inner cylindrical surface are provided. .

[0017]

According to this structure, when the spline teeth of the shaft spline and the hole spline do not mesh with each other, the shaft spline is spline-fitted due to the degree of freedom of relative displacement in the radial direction between the shaft spline and the spline fitting socket. The socket is displaced toward the eccentric inner cylinder surface of the mating socket. When the tip surface of the shaft spline comes into contact with the tapered surface at the back of the eccentric inner cylinder surface, the shaft spline is again displaced from the eccentric inner cylinder surface side to the complete spline teeth side, and the shaft spline and the spline fitting socket are separated. Ultimately, both spline teeth gradually engage from the tooth surface side while relatively rotating by a very small amount.

[0018]

FIGS. 2 to 4 show an embodiment of the present invention. FIGS. 8 and 9 show an example of a spline fitting socket which is attached to the tip of the restraining sleeve 12 in place of the hexagonal hole 26 and the adapter 24. Is shown.

As shown in FIGS. 2 to 4, the spline fitting socket 41 includes a hollow shaft-shaped socket main body 42, and ring-shaped upper and lower holders 43 and 44 which support the socket main body 42 from above and below. Is composed of
It is fixed to the restraining sleeve 12 as a support by a hexagonal bolt 45.

The socket body 42 has spline teeth of a hole spline 47 formed on the inner periphery of the lower half portion of the general shaft portion 46 as described later, and a flange portion 48 having a width across flat shape is formed at the upper end. The projection is formed. On the other hand,
The lower holder 44 includes a general shaft portion 46 of the socket body 42.
An oval support hole 49 capable of receiving the flange portion 48 is formed, and a groove portion 50 capable of receiving the flange portion 48 is formed. Then, the general shaft portion 46 of the socket body 42 is inserted into the support hole 49 and the flange portion 48 is inserted.
Is fitted into the groove 50, and the upper holder 43 and the lower holder 44 are fastened with the bolts 51, so that the socket body 42 is slidably supported in the major axis direction of the elliptical support hole 49.

A spring holder 52 is fixed to a part of the lower holder 44 by bolts 53. A compression coil spring 53a is interposed between the spring holder 52 and the flange 48 of the socket body 46. Is equipped. As a result, the socket body 46 is
Is biased to the left.

On the inner periphery of the socket body 46, spline teeth of a hole spline 47 which can be fitted to the shaft spline portion 5 of the work 1 shown in FIG. 9 are formed, as shown in FIG. Thus, three spline teeth adjacent to each other in the total number of spline teeth are replaced with the complete spline teeth 5.
4 and the other spline teeth 55 are cut away from the opening end face side of the socket body 46 toward the back side over a predetermined length.

A predetermined amount a from the axis of the socket main body 46 is provided at a portion where the spline teeth 55 are partially removed.
The eccentric inner cylindrical surface 56 is formed so that the eccentric inner cylindrical surface 56 is partially eccentric.

Here, the portion of the socket body 46 where the three complete spline teeth 54 are left coincides not with the minor axis direction but with the major axis direction of the elliptical eccentric inner cylindrical surface 56.

A wedge-shaped chamfer portion 57 is formed at one end of the complete spline teeth 54 by chamfering both of the tooth surfaces and the tooth apex surface. Each spline tooth 5
5 also has a tapered surface 58 formed by chamfering a step portion between the eccentric inner cylindrical surface 56 and the eccentric inner cylindrical surface 56.

The spline fitting socket 41 thus constructed is applied to the automatic tightening device shown in FIGS.
When the spline fitting socket 41 and the shaft spline 5 of the work 1 are fitted together, the shaft spline portion 5 (main shaft 4) of the counterpart work 1 is supported via the bearing 3 as shown in FIG. The spline-fitting socket 4
The first socket body 42 has a degree of freedom in radial displacement as shown in FIG.

Therefore, the spline fitting socket 41
A thrust is applied to the spline fitting socket 41 so as to spline fit the shaft spline portion 5 of the mating side. Then, as shown in FIG. 5, when the phases of the spline teeth of the shaft spline portion 5 and the hole spline 47 of the socket body 42 match, the two mesh smoothly and are spline-fitted.

On the other hand, the shaft spline portion 5 and the socket body 4
If the phase of the spline teeth with the hole spline 47 on the second side does not match, as shown in FIG.
6A, the socket body 42 of the spline fitting socket 41 moves in the direction of arrow b in FIG. 6A due to its radial degree of freedom, and the axial spline portion 5 It comes into the eccentric inner cylindrical surface 56 of the main body 42.

When an axial thrust is applied to the spline fitting socket 41, the tip of the shaft spline 5 comes into contact with the tapered surface 58 on the socket body side as shown in FIG. 6B. The socket body 42 is displaced in the direction of arrow c. Then, while the socket body 42 is displaced in the direction of arrow c, the shaft spline 5 rotates by a very small amount in a direction in which the phases of the two spline teeth coincide with each other due to interference between the two spline teeth. As a result, the shaft spline portion 5 and the hole spline 47 gradually mesh with each other in accordance with the displacement in the radial direction, so that the shaft spline portion 5 and the shaft spline portion 47 are smoothly meshed without generating a dent.

In this embodiment, before the lock nut 7 is tightened to the work 1 having the shaft spline portion 5, the spline fitting socket 41 is fitted to the shaft spline portion 5 so that Although the example in which the rotation is stopped is shown, the above spline fitting socket 4 is used.
1 can also be used for an automatic spline inspection apparatus.

For example, as shown in FIG. 7, the above-mentioned spline fitting socket 41 is used as a master gauge 61,
While this is spline-fitted to the mating shaft spline portion 62, by monitoring the fitting stroke and the fitting resistance at that time, it is possible to determine whether the spline is fitted properly.

However, in this case, it is needless to say that a relative degree of freedom of rotation and a relative degree of freedom of radial displacement are required between the master gauge 61 and the shaft spline portion 62 on the other side.

[0033]

As described above, according to the present invention, the spline fitting socket is provided with a relative rotational degree of freedom and a radial relative degree of freedom between the mating axial spline and the spline fitting socket. The spline fitting socket can be fitted to the mating shaft spline simply by applying thrust in the axial direction, so if the spline fitting work is performed by automated equipment, an adapter is required as in the past Otherwise, no dent is generated on the shaft spline, and the number of working steps can be reduced and the spline quality can be improved.

[Brief description of the drawings]

1A and 1B are diagrams showing an embodiment of the present invention, wherein FIG. 1A is an enlarged view of a main part of FIG. 2, FIG. 1B is a bottom view of FIG. 1A, and FIG. FIG.

FIG. 2 is a sectional view of a socket showing one embodiment of the present invention.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a bottom view of FIG. 2;

FIG. 5 is an operation explanatory view of the socket shown in FIG. 2;

FIG. 6 is an operation explanatory view of the socket shown in FIG. 2;

FIG. 7 is an explanatory view of a spline master gauge to which the socket of the present invention is applied.

FIG. 8 is a sectional view of the upper half of the automatic tightening device to which the socket of the present invention is applied.

FIG. 9 is a cross-sectional view of the lower half of the automatic tightening device to which the socket of the present invention is applied.

FIG. 10 is a bottom view of FIG. 9;

FIG. 11 is an enlarged view of a main part of FIG. 9;

[Explanation of symbols]

 5 Shaft spline part 41 Spline fitting socket 42 Socket body 43 Upper holder 44 Lower holder 47 Hole spline 54 Complete spline teeth 55 Spline teeth 56 Eccentric inner cylindrical surface 57 Chamber part 58 Tapered surface

Claims (1)

(57) [Claims] A socket having a hole spline shape to be spline-fitted to a shaft spline, and having a relative rotational degree of freedom and a radial relative displacement degree of freedom between the shaft spline and the shaft. A spline-fitting socket that can be spline-fitted to a shaft spline by giving a fitting thrust in one direction, a socket body having spline teeth formed on an inner peripheral surface, and some of the spline teeth Is formed as a complete spline tooth, and formed by cutting off a predetermined length from the opening end face side of the socket body over half of the circumference of the other socket body, and the tip circle and part of the complete spline tooth are left. The eccentric inner cylindrical surface of the matching eccentric circle, and chamfering both the tooth surface and the tooth tip surface on the opening end surface side of the socket body for each of the complete spline teeth. And a taper surface formed at a stepped portion between a spline tooth other than the complete spline teeth and the eccentric inner cylindrical surface.