JPS5930612Y2 - Shaft insertion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a shaft insertion device for press-fitting a rotating shaft into a rotor of a motor for a machine tool, for example.

As a conventional rotary shaft insertion device for a machine tool motor, the first
As shown in the figure, the transfer plate on which the rotor material 1 is placed
The units 2 are sent out one after another, and the transfer unit 2 is stopped by the trowel positioning body 41 on the movement trajectory of the shaft insertion machine 3, and the rotating shaft is inserted into the shaft hole 6 of the rotor material 1 by the rotation of the shaft insertion machine 3. It is known that 7 is strained so as to be press-fitted.

For example, the transfer units 2 are disposed in large numbers on the conveyor 8, and have a holder 9 on the upper surface for holding the rotor material 1, and a V-groove 1 into which the positioning body 4 can be fitted.
0 is formed.

Reference numeral 11 indicates a rotary shaft relief hole bored in the transfer unit 2.

The positioning body 4 is located at the position of the transfer unit 2.
It operates so that the V-groove 101 is fitted when the V-groove 101 arrives.

The shaft insertion machine 3 is a machine that moves back and forth between a rotating shaft supply position (shown by a solid line) and a rotating shaft pressure position (shown by a two-dot chain line) as shown in FIG. 3 reaches the press-fitting position I, the rotating shaft 7 is press-fitted into the rotor material 1 on the transfer unit 2.

By repeating the above motion repeatedly, the rotating shaft 7 is continuously press-fitted into the rotor material 1.

The respective stop positions of the shaft insertion machine 3 are detected by, for example, a switch device (not shown), and the rotational movement thereof is stopped. It is known that it is difficult to precisely match the positions of the two in terms of mechanical accuracy.

Therefore, various measures have been devised in the past.

For example, a device with a special device for finely adjusting the position of the rotating shaft 7 and the shaft hole 6 may be considered, but this has the disadvantage of increasing costs and lacking productivity in inserting the shaft. .

However, unless fine adjustment is made, there is a risk that the shaft I will be press-fitted into the rotor material 1 eccentrically, and it is expected that many defective products will be produced.

In view of the above points, the present invention is designed to accurately align the position of the rotating shaft and the shaft hole of the rotor material without using any special equipment, and to prevent the shaft from being press-fitted into the rotor material in a centered manner. , thereby attempting to improve the performance of this type of shaft insertion device.

Hereinafter, specific examples of the present invention will be explained in detail with reference to the drawings.

FIG. 2 is a partially cutaway perspective view showing an example of the shaft insertion device.

In FIG. 2, 15 indicates the entire shaft insertion device, which includes a rotating shaft supply section 17 provided on a fixed base 16,
On the conveyor 18 (multiple transfers
It is composed of a unit 19.

The rotary shaft supply unit 17 includes a guide tube 21 that supplies the rotary shaft 20, a shaft guide body 22 that guides the rotary shaft 20, a shaft inserter 23, and a lower part of the shaft guide body 22 (transporter receiver 2 located here).
4. The side of the transfer unit 19 is composed of a reciprocating shaft holding conveyor 25, an actuator, that is, an air cylinder 26, and the like.

The shaft guide body 22 and the carrier receiver 24 are configured by overlapping each other,
It is fixed onto the fixed base 16 with screws or the like.

The shaft guide 22 has a circular hole 27 bored in the center through which the rotating shaft 20 can pass, and 28 is the upper part O of the circular hole 27.
This shows the chamfered section.

The end face of the guide tube 21 is set at such a position that the supplied rotary shaft 20 can be guided to fall onto the chamfered portion 28 of the shaft guide 22.

Further, the shaft insertion machine 23 is operated by an air cylinder 29, and operates to push down the supplied rotating shaft 20, and its axis coincides with the axis of the circular hole 2γ of the shaft guide 22. It is set to do so.

30 is a core frame of the shaft insertion machine 23.

The shaft holding conveyor 25 that reciprocates toward the transfer unit 19 has a structure in which the rotary shaft 20 that has been dropped while being guided by the circular hole 27 of the shaft guide body 22 is conveyed to the transfer unit 19 side. It has the function of temporarily holding the rotating shaft 20.

That is, as shown in FIGS. 2 and 3, this conveyor 25 has a circular hole 31 that guides the rotary shaft 20, a stepped portion 32 that prevents the conveyor 25 from coming into contact with the rotor rotation shaft when the conveyor 25 moves backward,
It is composed of a shaft holding spring 33 and the like provided on the vertical surface of the stepped portion 32.

The plane shape of the conveyor main body 25a is a perfect circle, and its diameter is the same as the diameter of the rotor material 43, and a circular hole 31 is bored through the center thereof.

31a indicates a chamfered portion.

The vertical dimension 1 of the stepped portion 32 is determined by at least the protruding dimension 12 (see FIG. 2) of the rotary shaft 20 fitted to the rotor material 34, and the horizontal dimension 13 is determined by the rotation when the conveyor 25 moves back. The dimensions are set so that it does not come into contact with the shaft 20.

Note that the height dimension 14 of the conveyor 25 is smaller than the length dimension of the rotating shaft 20.

The shaft holding spring 33 holds the rotating shaft 20 pushed down by the shaft inserting machine 230 in a predetermined position, and one end thereof has a concave shape 33a (which is bent) that follows the circumferential surface of the rotating shaft 20.
The other end side, that is, the backward movement direction side of the conveyor 25 is the conveyor 2
The screw σ trowel is fixed to the vertical surface of the stepped portion 32 of No. 5.

This carrier 25 has a pair of elastic carrier arms 34.
The actuator, that is, the piston 35ζ of the air cylinder 26 is attached via the piston 35ζ.

One ends of the pair of transport arms 34 are respectively attached to both sides of the transport machine 25 in parallel with the reciprocating direction thereof, and are specifically constructed of leaf spring bodies.

Reference numeral 36 denotes a mounting bracket for mounting the air cylinder 26 to the fixed base 16.

In FIG. 3, reference numeral 37 indicates a mounting recess for mounting the transport arm 34, and reference numeral 38 indicates a screw hole for mounting the transport arm.

On the other hand, the carrier body 24, which is located at the lower part of the shaft guide body 22 and holds the carrier 25, has a cubic shape as shown in FIGS. Conveyor 25 whose planar shape is semicircular and has the same diameter as the rotor material 43
A semi-cylindrical recess 41 is formed in which the conveyor 25 is housed, and a pair of support parts 42 are formed on both sides to support the pair of conveyor arms 34 so that the conveyor 25 can reciprocate while maintaining a horizontal state. It is something that

The length dimension 15 of the semi-cylindrical recess 41 is set to match the overall height dimension 14 of the conveyor 25, or to be slightly longer.

Furthermore, the pair of support parts 42 are formed in a semicircular shape so that the distance between the pair of transport arms 34 attached to the transport machine 25G is smaller than the diameter of the transport machine 25 (see Fig. 3). It is formed so as to bite into the columnar recess 41 (see FIG. 4).

In this case, the center of the circular hole 31 of the conveyor 25 in the state where the conveyor receiver is held by the body 24 is the center of the circular hole 31 of the shaft guide body 22.
7 and the center of the inserter 23, respectively.

Further, the stroke length of the air cylinder 26 corresponds to the distance between the center position where the carrier 25 is held by the carrier body 244 and the center position of the shaft hole of the rotor material 43 on the transfer unit 19 side.

In addition, in FIG. 4, 44 and 45 indicate a screw hole and a pilot hole, respectively.

The operations of the rotating shaft 20 supplied from the guide tube 21, the shaft inserter 29, and the air cylinder 26 are as follows.

That is, when the conveyor 25 comes into contact with the semi-cylindrical recess 41 of the body 24 due to the backward motion of the construction cylinder 26, the rotating shaft 20 moves from the guide tube 21 to the circular hole 27 of the shaft guide body 22. At the same time, the shaft inserting machine 26 operates and pushes down the rotating shaft 20 from the core frame 30.

Therefore, the rotating shaft 20 is held between the shaft holding springs 33 of the conveying machine 25, and the lower end of the rotating shaft 20 comes into contact with the lower surface 41a of the semi-cylindrical recess 41, and the conveying machine 25 holding the rotating shaft 20 is By reciprocating the cylinder 26, it moves toward the transfer unit 19 again.

In FIG. 2, transfer units 19 are placed on the conveyor 18 at regular intervals, and the motor rotor material 43 is conveyed by the transfer units 19.

Then, the rotor auxiliary 43 is placed at the intersection of the extended line of movement of the center of the shaft hole 46 of the rotor material 43 mounted on the transfer unit 19 and the extended line of movement of the center of the rotary shaft 20 held in the conveyor 25. The transfer unit 19 is fixedly held by the positioning body 474 so that the shaft hole 46 is positioned.

This positioning body 47 has the same structure as the previous one, so a description thereof will be omitted.

Reference numeral 48 indicates a groove provided in the fixing base 49 of the transfer unit 19 into which the positioning body 47 is fitted.

A shaft press-fitting machine 51 for press-fitting the rotating shaft 20 into the rotor material 43 is installed on the vertical extension line of the above-mentioned intersection position.

Note that the plane spacing between the shaft insertion machine 23 and the shaft press-fitting machine 51 corresponds to the reciprocating stroke of the air cylinder 26.

Reference numeral 52 indicates a support column to which the shaft insertion machine 23 and the insertion/pressing machine 51 are attached.

As shown in FIGS. 2 and 5, the transfer unit 19 is composed of a rotor material holder 54, a rotor material holder 55, an air cylinder 56 associated with the rotor material holder 55, and the like.

The rotor material holder 54 has a semi-cylindrical recess 57 formed therein, similar to the conveyor receiver body 24.

The center of the semi-cylindrical four parts 57 is located at the shaft hole 4 of the rotor material 43.
Matches the center of 6.

Note that the escape hole 58 of the rotating shaft 20 is bored on the fixed base 49.

The total height of the four semi-cylindrical portions 57 is equal to the thickness of the rotor material 43 plus the height of the conveyor 25.

Therefore, the semi-cylindrical recess 5 of this rotor material holder 54
The center of the circular hole 31 of the conveyor 25 fitted with the rotor 7 coincides with the center of the shaft press-fitting machine 51, and also coincides with the center of the shaft hole 46 of the rotor material 43 and the shaft relief hole 58 on the fixing base 49.

In this case, the upper surface 43a of the rotor member 43 fitted in the semi-cylindrical recess 51 and the lower surface 41a of the semi-cylindrical recess 41 of the carrier receiver body 24 are on the same plane.

The rotor material holding body 55 is for ensuring that the rotor material 43 fitted in the semi-cylindrical recess 57 of the rotor material holding body 54 is prevented from moving, and as shown in FIG. 2 and FIG. It is composed of a suppression lever 59, a connection lever 60, and the like.

The pair of suppression levers 59 have a symmetrical shape and are adapted to rotate around support shafts 61 that are respectively set up from the fixed base 49.

The thickness of the pressing lever 59 is the same as or smaller than the thickness of the rotor material 43.

A projection 62 directed toward the center of the rotor material 43 is formed at one end of each pressing lever 59.

One end of a connecting lever 60 is rotatably attached to the other end of each pressing lever 59, and the other ends of both connecting levers 60 are connected by a pin 63, and an air cylinder 56 is connected to the pin 63. A piston 64 is attached.

As shown in FIG. 5, as the air cylinder 56 moves backward (in the direction of the arrow in the figure), the protrusion 6 of each pressing lever 59
2 expands, the rotor material 43 is moved to the rotor material holder 54.
The press levers 5 of the rotor material 43 are fitted into the semi-cylindrical recesses 57 of the rotor material 43 by the forward movement of the air cylinder 56.
9 to ensure movement prevention, and attach the rotating shaft 2 to the rotor material 43.
0 is press-fitted, the rotor material 43 into which the rotary shaft 20 has been press-fitted can be taken out again by the backward motion of the air cylinder 56.

Next, the overall operation of the shaft insertion device 1 will be explained. The mounting of the rotor material 43 on each transfer unit 19 is as described above.

Transfer unit 19 with rotor material 43 attached
is conveyed by the conveyor 18 in the direction of arrow A in FIG.
For example, by a switch device (not shown) the conveyor 18
The position is fixed by the positioning body 47.

In this case, it is extremely difficult to achieve complete mechanical accuracy of the positioning body 47 and transfer unit 19, so the transfer is stopped.

Normally, the center of the semi-cylindrical recess 57 of the rotor material holder 54 of the unit 19, that is, the center of the shaft hole 46 of the rotor material 43, does not completely align with the center of the circular hole 31 of the conveyor 25, but is slightly shifted. be.

On the other hand, at the same time when the temporary stop of the transfer unit 19 is completed (as described above, the rotating shaft 20 supplied from the guide tube 21 is held at a predetermined position, and the conveying machine 25 of the rotating shaft supply section 17 is The forward movement of the cylinder 26 moves it toward the transfer unit 19 .

In this case, since the center of the rotating shaft 20 held by this carrier 25 and the center of the shaft hole 46 of the rotor material 43 do not coincide, when the carrier 25 comes into contact with the semi-cylindrical recess 57, the center of both As mentioned above, they do not match.

However, this carrier 25 is supported by a pair of leaf springs 34, and in this case, the outer circumferential surface of the carrier 25 is not in full contact with the circumferential surface of the semi-cylindrical recess 51, so the air cylinder As the pair of transporting arms 34 are bent by the pressing force of the transporter 26, the centers of the transporter 25 and the semi-cylindrical recess 57 gradually come into alignment, and their peripheral surfaces gradually come into contact with each other.

When both surfaces are in perfect contact with each other, the centers of both, that is, the center of the rotating shaft 20 held by the conveyor 25 and the center of the shaft hole 46 of the rotor material 43 completely coincide.

Note that even if the centers of the shaft hole 46 of the rotor material 43 and the shaft press-fitting machine 51 are slightly misaligned, there is almost no problem by selecting the diameter of the core frame of the shaft press-fitting machine 51 to be smaller than the diameter of the rotating shaft 20. Avoided.

When the shaft press-fitting machine 51 press-fits the rotating shaft 20 into the rotor material 43, as described above, the center of the rotating shaft 20 and the center of the shaft hole 46 of the rotor material 43 are aligned, so (2) It is done without any trouble.

Simultaneously with the completion of the operation of the axial press-fitting machine 51, the conveyor 25 enters a backward motion by the air cylinder 26, but the conveyor 25
Since the shaft holding spring 33 is deflected and escapes the protruding portion of the rotating shaft 20, the carrier receiver is again placed in the semi-cylindrical recess 41 of the body 24.

After that, the conveyor 13 starts to move by the switch device, the next transfer unit 19 is delivered, and the rotor material 43 into which the rotating shaft is press-fitted is removed from the transfer unit 19 and sent to the next process. become.

Note that the present invention is not limited to the above specific example.

Although it has been explained that a leaf spring is used as the transport arm 34 in the above example, a spring or a wire may be used instead, and the transport arm 34 may be elastic as described above. good.

Furthermore, in the specific example described above, the air cylinder 26 is used to drive the conveyor 25, but a hydraulic cylinder or other actuator may be used instead.

Note that the device of the present invention can be applied not only to the above-mentioned embodiments but also to other shaft insertion devices such as pin insertion devices.

As described above, according to the shaft insertion device of the present invention, the rotor material 43 and the semi-cylindrical recess 57 having the same diameter as the outer diameter of the rotor material 43 are provided.
a rotor holding body 54 having a rotor holder 54, a cylindrical shaft holding conveyance machine 25 having the same diameter as the outer diameter of the rotor material 43, and this conveyance machine 2.
The conveying arm 3 interposed between the actuator 26 that drives the actuator 5 and the conveying machine 25 of this actuator 26
4, the shaft 20 held by the conveyor 25 is conveyed by the actuator 26 toward the rotor material 43 held by the rotor holder 54, and the rotor material 43I is twisted so that the shaft 20 is inserted therein. Therefore, even if the conveyor 25 moves in a state where the center of the shaft 20 held by the conveyor 25 and the center of the shaft hole 46 of the rotor material 43 do not completely coincide,
As the transfer arm 34 is bent by the pressure of the actuator 26, the center of the transfer device 25 gradually moves toward the center of the semi-cylindrical recess 57, and eventually the rotating shaft held by the transfer device 25 20 and the axis 46 of the rotor material 43
The centers of the two coincide perfectly.

Therefore, in order to align both axes as in the past (
There is no need to attach a special auxiliary machine, which simplifies the configuration of the device, and the shaft 2
The risk of the zero being inserted eccentrically can be avoided, and the performance of this type of device can ultimately be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a line plan view showing an example of a conventional shaft insertion device, Fig. 2 is a partially cutaway perspective view showing an example of a shaft insertion device according to the present invention, and Fig. 3 is an example of a shaft holding conveyor. Half-section perspective view,
FIG. 4 is a full cross-sectional perspective view showing an example of the carrier receiver, and FIG. 5 is a plan view for explaining the operation of the transfer unit. 15 is a shaft insertion device, 2o is a rotating shaft, 25 is a shaft holding conveyor, 26 is an actuator, 34 is a conveying arm, 43 is a rotor material, 54 is a rotor holder, and 57 is a semi-cylindrical recess thereof.

Claims (1)

[Scope of utility model registration request] a rotor material, a rotor holder having a semi-cylindrical recess with the same diameter as the outer diameter of the rotor material, and a shaft holder having a cylindrical shape with the same diameter as the outer diameter of the rotor material and having an elastic body for holding the shaft. A conveying machine, an actuator for driving the conveying machine, and a conveying arm made of an elastic body interposed between the actuator and the conveying machine, and a shaft held by the conveying machine, A shaft insertion device is arranged such that the shaft is transported by the actuator to the rotor material held by the rotor holder and inserted into the rotor material.