JPH07190078A - Spline mating socket - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to fit the mating shaft spline by simply applying axial thrust. A socket main body 42 is supported by a lower holder 44 and an upper holder 43 having an oval support hole 49.
It is slidably supported in the major axis direction. The three spline teeth on the inner circumference of the socket body 42 are replaced by the complete spline teeth
4, the other spline teeth 55 are partially removed to form the eccentric inner cylindrical surface 56. A chamfer portion 57 is formed at the tip of the complete spline tooth 54, and a tapered surface 58 is formed at the inner portion of the eccentric inner cylindrical surface 56.

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 which is spline fitted to a shaft spline, and more particularly to a nut for an external thread portion integrated with the shaft spline by an automatic tightening device. The present invention relates to a spline fitting socket suitable for being fitted to the shaft spline and used as a rotation preventing member for the shaft spline when tightening.

[0002]

8 and 9 show an example of an automatic tightening device for automatically tightening a nut on a shaft part (work) having a shaft spline. That is, the work 1 has a shaft spline portion 5 formed at one end of a long main shaft 4 supported by a main body portion 2 via a bearing 3, and an annular part such as a gear at the base portion of the bearing 3 side. 6
Is inserted in advance, and the automatic tightening device performs the automatic tightening work 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 that restrains the main shaft 4 of the work 1 prior to tightening the lock nut 7 are provided concentrically with each other.

As shown in FIG. 10, the nut socket 11 is slidably and non-rotatably supported by a rotary sleeve 15 via a support plate 13 and a holder 14, and the lock nut 7 is attached to the tip thereof. 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 lock nut 7 is transmitted to the rotary sleeve 15 via the gears 18 and 19, so that the lock socket 7 is rotated integrally with the rotary sleeve 15 so that the lock nut 7 causes the specified torque. Can be tightened up to.

The restraining sleeve 12 is slidably supported by the case 10 and guided by the engagement of the guide rail 20 and the guide block 21. 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
The adapter 24 is previously mounted by spline fitting, and the hexagonal head 25 of the adapter 24 is attached to the hexagonal hole 2 at the tip of the restraining sleeve 12, as will be described later.
6 is fitted.

As shown in FIG. 11, the adapter 24 includes a sleeve 28 having a hole spline portion 27,
The sleeve 28 is formed of a support body 29 having a hexagonal head portion 25, and the sleeve 28 has a slight amount of play in the axial direction and the rotation direction in advance due to the engagement of the elongated hole 30 and the pin 31 with the support body 29. I have it.

Therefore, according to the structure of FIGS. 8 and 9, when the slide table 9 is lowered, the restraining sleeve 1 is first
The tip of 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, the nut socket 11 is slidable with respect to the rotary sleeve 15, so that the nut socket 11 only contacts the lock nut 7 by its own weight.

After that, when the nut runner unit 17 is activated, the nut sleeve 11 together with the rotary sleeve 15 is activated.
After rotating the
Push 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, while the lock nut 7 rotates in advance. 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 into which the adapter 24 is spline-fitted rotates.

By the fitting of the restraining sleeve 12 and the adapter 24, the rotation of the main shaft 4 thereafter is prevented and its rotation is prevented, and the lock nut 7 is tightened by the nut socket 11 to a specified torque.

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

In place of the adapter 24 described above, a hole spline portion fitted to the shaft spline portion 5 on the main shaft 4 side may be directly formed in the restraining sleeve 12 to restrain the main shaft 4.

[0013]

When the main shaft 4 is restrained by using the adapter 24 as described above,
Not only it is 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 man-hours. Is not desirable.

When a hole spline is directly formed at the tip of the restraining sleeve 12 and the 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 formed. If they are not properly meshed with each other, dents will be generated on the shaft spline portion 5 on the work 1 side, and when the mating parts are spline-fitted to the shaft spline portion 5 in a later process, troubles such as inability to insert will occur. There was a fear.

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

[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 freedom degree and a radial relative displacement freedom degree with respect to the shaft spline. Is a spline fitting socket that can be spline-fitted to a shaft spline by previously providing a fitting thrust in the axial direction, and a socket body having spline teeth formed on the inner peripheral surface, A part of the spline teeth is left as a complete spline tooth, and the other spline teeth of more than half circumference of the socket body are formed by cutting out from the opening end face side of the socket body for a predetermined length. An eccentric inner cylindrical surface of which the part is aligned with the tip circle of, and both tooth surfaces on the opening end surface side of the socket body for each of the complete spline teeth and A chamfered portion formed by chamfering the front surface, and a tapered surface formed in a step portion between the spline tooth other than the complete spline tooth 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 by the degree of freedom of relative displacement in the radial direction between the shaft spline and the spline fitting socket. The eccentric inner cylinder surface of the mating socket is displaced. Then, when the tip end surface of the shaft spline comes into contact with the inner tapered surface of the eccentric inner cylindrical surface, the shaft spline is displaced again from the eccentric inner cylindrical surface side to the complete spline tooth side, and the shaft spline and the spline fitting socket are separated. Eventually, both spline teeth gradually mesh with each other from the tooth surface side while rotating relatively by a small amount.

[0018]

2 to 4 are views showing an embodiment of the present invention. An example of a spline fitting socket which is mounted at the tip of the restraining sleeve 12 shown in FIGS. 8 and 9 in place of the hexagonal hole 26 and the adapter 24 is shown. Shows.

As shown in FIGS. 2 to 4, the spline fitting socket 41 includes a hollow shaft-shaped socket main body 42, and a ring-shaped upper holder 43 and a lower holder 44 for sandwiching and supporting the socket main body 42 from above and below. Consists of
It is fixed to the restraining sleeve 12 as a support by the hexagon socket head cap bolt 45.

As will be described later, the socket body 42 has spline teeth of a hole spline 47 formed on the inner circumference of the lower half of the general shaft portion 46 thereof, and a flange portion 48 having a dihedral width at the upper end portion. It is formed to project. On the other hand,
The lower holder 44 includes a general shaft portion 46 of the socket body 42.
Is formed with an elliptical support hole 49 capable of receiving the flange portion 48 and a groove portion 50 capable of receiving the flange portion 48. Then, the general shaft portion 46 of the socket body 42 is inserted into the support hole 49, and the flange portion 48 is formed.
The socket main body 42 is slidably supported in the major axis direction of the elliptical support hole 49 by fitting the upper holder 43 and the lower holder 44 with the bolts 51 after fitting into the groove 50.

A spring holder 52 is fixed to a part of the lower holder 44 with a bolt 53, and a compression coil spring 53a is interposed between the spring holder 52 and the flange portion 48 of the socket body 46. It is equipped. As a result, the socket body 46 is
Is urged to the left.

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

Then, in the part where the spline teeth 55 are partially cut off, a predetermined amount a from the axial center of the socket main body 46 is formed.
The eccentric inner cylindrical surface 56 is formed so as to be eccentric only, and the circle of the eccentric inner cylindrical surface 56 is set so that a part thereof coincides with the tip circle of the complete spline tooth 54.

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

A wedge-shaped chamfer portion 57 is formed by chamfering both tooth surfaces and tooth crests at one end of the complete spline tooth 54, while other than the complete spline tooth 54. Each spline tooth 5
As for 5 as well, a tapered surface 58 is formed by chamfering a step portion between the eccentric inner cylindrical surface 56 and the step portion.

The spline fitting socket 41 thus constructed is applied to the automatic tightening device shown in FIGS.
When fitting the spline fitting socket 41 and the shaft spline 5 on the work 1 side, the shaft spline portion 5 (main shaft 4) of the mating work 1 is supported via the bearing 3 as shown in FIG. Since it has a degree of freedom in its rotation direction, the spline fitting socket 4
The socket body 42 of No. 1 has a degree of freedom of displacement in the radial direction as shown in FIG.

Therefore, the spline fitting socket 41 is used.
A thrust force is applied to the spline fitting socket 41 in order to spline fit the shaft spline portion 5 on the other 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 on the socket main body 42 side match, the two are smoothly meshed and spline-fitted.

On the other hand, the shaft spline portion 5 and the socket body 4
When the phase of the spline teeth does not match the hole spline 47 on the 2 side, the shaft spline portion 5 is attached to the chamfer portion 57 on the socket body 42 side as shown in FIG. 6 (A).
Since the end faces of the sockets come into contact with each other, the socket body 42 of the spline fitting socket 41 moves in the direction of arrow b in FIG. 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, in the process of displacement of the socket main body 42 in the direction of the arrow c, the shaft spline 5 rotates by a very small amount in the direction in which the phases of both spline teeth coincide with each other due to the interference between the 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, and finally, the shaft spline portion 5 and the hole spline 47 smoothly mesh with each other without generating a dent.

Here, in the above embodiment, the spline fitting socket 41 is fitted to the shaft spline portion 5 before the lock nut 7 is fastened to the work 1 having the shaft spline portion 5, and the spline fitting of the shaft spline 5 is performed. Although the example of applying the rotation stopper is shown, the spline fitting socket 4 described above is used.
1 can also be used for an automatic spline inspection device.

For example, as shown in FIG. 7, the above spline fitting socket 41 is used as a master gauge 61,
While this is spline-fitted to the mating shaft spline portion 62, the fitting stroke and fitting resistance at that time can be monitored to determine the suitability of the spline fitting state.

However, in this case, it goes without saying that a relative rotational degree of freedom and a radial relative displacement degree of freedom are required between the master gauge 61 and the mating shaft spline portion 62.

[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 displacement degree of freedom in advance with the mating shaft spline. The spline mating socket can be mated with the mating shaft spline simply by applying thrust in the axial direction.Therefore, an adapter is required when the spline mating work is performed by automated equipment. Otherwise, the dents will not be generated on the shaft spline, and the work man-hours can be reduced and the spline quality can be improved.

[Brief description of drawings]

1A and 1B are views showing an embodiment of the present invention, in which 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 an embodiment of the present invention.

FIG. 3 is a plan view of FIG.

4 is a bottom view of FIG.

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

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

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

FIG. 8 is a cross-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.

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

[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 tooth 55 ... Spline tooth 56 ... Eccentric inner cylindrical surface 57 ... Chamfer part 58 ... Taper surface

Claims (1)

[Claims] 1. A socket having a hole spline shape, which is spline-fitted to an axial spline, having a relative rotational degree of freedom and a radial relative displacement degree of freedom with the axial spline in advance. A spline-fitting socket that can be spline-fitted to a shaft spline by applying a fitting thrust in a directional direction.The socket body has spline teeth formed on the inner peripheral surface, and some of these spline teeth. Is left as a complete spline tooth, and is formed by cutting off the spline teeth of a half circumference or more of the other socket body from the opening end face side of the socket body over a predetermined length, and the tip circle and a part of the complete spline tooth are formed. Chamfer the eccentric inner cylindrical surface of the matching eccentric shape and both tooth surfaces and tooth tip surfaces on the opening end surface side of the socket body for each full spline tooth. And a taper surface formed on a stepped portion between the spline tooth other than the complete spline tooth and the eccentric inner cylindrical surface, the spline fitting socket.