JPH0765906B2 - Encoder attachment / detachment method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for attaching and detaching an encoder mounted on an end portion of a shaft for controlling the speed and positioning of a rotating body.

[Conventional technology]

Conventionally, this type of encoder is provided with a taper 1a at the end of the shaft 1 of the rotating body whose speed and position are to be measured, as shown in the side sectional view of the main part in FIG. Is arranged.

That is, there is an encoder tightening screw threaded through a central hole 26 formed at the axial center of the coupling portion 21 of the encoder 2 and screwed into a tap hole (second tap hole) drilled in the central portion of the taper 1a. , So that the encoder 2 has a shaft 1
Is stuck to.

Then, this is how the encoder 2 is detached from the shaft 1.

First, remove the encoder tightening screw and insert the bearing removal jig 30 into the center rod (the screw is engraved on the outer periphery).
Insert 31 until it abuts the end surface of shaft 1.

At this time, the tip 32a of the claw portion 32 of the jig 30 (a screw hole (not shown) for screwing with the screw of the central true rod 31 is provided in the central portion) 32 is hooked on the side surface of the fixed peripheral portion 23. .

Then, when the handle 33 is turned, since the true rod is in contact with the shaft 1, the encoder 2 moves in the direction shown by the arrow together with the claw portion 32, and the encoder 2 is removed from the shaft 1.

Reference numeral 5 denotes a bearing, which is supported by the fixed portion 22 and is connected to the coupling portion 21.
Is rotatably supported and its outer ring is fixed by rings 24 and 25.

Reference numeral 8 denotes a rotating disk, which transmits light from a light emitting portion 10 included in the circuit board 7 attached to the peripheral portion 23 by means of a board attaching screw 13 and gives it to the light receiving portion 9.

Further, 6 is a bearing for rotatably supporting the shaft 1, and 4 is a cover 12 tightening screw.

[Problems to be solved by the invention]

As described above, the shaft 1 of the rotating body and the encoder 2 which are conventionally coupled by the taper 1a are coupled to each other by the bearing extracting jig 30.
Since the peripheral portion 22 which is the bottom surface of the encoder 2 is removed by applying force by using, there is a drawback that the surface of the product (encoder 2) may be damaged in addition to using a special tool. there were.

It is an object of the present invention to provide an encoder attachment / detachment method that overcomes the drawbacks of the conventional methods, does not require a special tool, and does not damage the encoder during attachment / detachment.

[Means for solving problems]

According to the present invention, a rotary disk that fits into a taper formed at the end of a shaft of a rotating body and is rotatably supported by a bearing supported by a fixed portion of an encoder and that transmits light from a light emitting portion according to the rotation thereof is provided. Provided is a cylindrical coupling portion, and a first tap hole is threaded in the axial direction of the coupling shaft forming the central axis of the coupling portion. An encoder tightening screw having an outer diameter smaller than that of the first tap hole. Through the rotary disk mounting side of the first tap hole to the taper side, and bore a second tap hole that engages with the tightening screw in the central axis of the taper, and screw the tightening screw into this hole. The encoder to the shaft, remove the tightening screw, and insert the removal screw that engages with the first tap hole of the joint into the taper side from the rotary disk mounting side of the first tap hole. The tip of the tip of this removal screw is Even after contact with the shift ends, noted by rotating the detaching screws in the traveling direction is an encoder detachable method characterized by removing the encoder.

[Work]

When the encoder is attached to the shaft, the inner peripheral surface of the coupling portion is fitted to and supported by the taper of the shaft end portion, and the second rotation screw is screwed into the second tap hole to fix the rotation stopper.

To remove the encoder from the shaft, insert the mounting screw that engages with the first tapped hole that is drilled in the axial direction of the coupling part, and push the mounting screw in the insertion direction while pressing the shaft end after contacting it. Rotate and retract the joint.

〔Example〕

FIG. 1 is a side sectional view showing the structure of one embodiment of the present invention.

In the drawings, common members are designated by the same reference numerals.

The encoder 2 includes a protrusion 61 of a bracket 60 that supports a bearing 6 that rotatably supports the shaft 1, a leaf spring 11 fixed by a leaf spring attachment screw 14 screwed to the protrusion 61, and an encoder attachment screw 15 interposed therebetween. Supported by the bracket 60.

A plan view of the leaf spring 11 is shown in FIG.

Reference numeral 14a is a leaf spring attachment hole through which the leaf spring attachment screw 14 is inserted, and 15a is an encoder attachment hole through which the encoder attachment screw 15 penetrates.

FIG. 3 is a side sectional view of an essential part of the present invention.

A coupling part 21 whose inner hole fits into the taper 1a of the shaft 1.
Indicates.

The encoder tightening screw 3 is screwed with the end of the shaft 1,
The connecting portion 21 is pressed against the shaft 1 via the taper 1a.

Therefore, a hole larger than the outer circumference of the encoder tightening screw 3 is opened in the coupling portion 21, and a tap screw hole 27 (first tap hole) is screwed on the inner circumference so as to become a screw hole.

In this way, the encoder 2 is attached to the shaft 1.

The procedure for removing the encoder from the fixed state is shown in FIG.

FIG. 4 (a) shows a state in which the encoder tightening screw 3 is rotated counterclockwise (counterclockwise) to be detached from the screwed engagement with the end portion of the shaft 1.

After that, in FIG. 4 (b), the removal screw which is screwed into the tap screw hole 27 screwed on the central axis of the coupling portion 21 of the encoder 2.
Insert 40 by rotating clockwise (clockwise) and advance toward the end of shaft 1.

As is clear from the state of FIG. 4 (c), when the removal screw 40 contacts the end of the shaft 1 and continues to rotate clockwise, the taper of the shaft 1 of the coupling portion 21 of the encoder 2 is continued.
After leaving 1a, encoder 2 moves to the left and shaft 1
Completely removed from.

The removal screw 40 may be the same as the cover tightening screw 4. In this case, it is not necessary to prepare a new screw for detaching the encoder, and the number of working jigs is reduced. Can be reduced.

〔The invention's effect〕

Here, the present invention completely eliminates the fear of damaging a part of the encoder due to the claw portion of the bearing extraction jig used in the conventional method, and the attachment / detachment of the encoder to / from the shaft can be extremely easily performed, resulting in high work efficiency. Significant improvement, cost reduction from the standpoint of man-hours, and smooth removal work without any difficulty.Therefore, unexpected defects do not occur in the test adjustment after removal. You can also

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing a state in which an encoder is mounted on a shaft, showing the configuration of the embodiment of the present invention, FIG. 2 is a plan view of a leaf spring, and FIG. FIG. 4 is a side sectional view showing an essential part of the invention, FIG. 4 is a state diagram showing the procedure of the present invention in a side sectional view, and FIG. 5 is a side sectional view showing an essential part of a conventional method. 1 ... Shaft, 1a ... Taper provided at the end of the shaft,
2 ... Encoder, 3 ... Encoder tightening screw, ... Cover 12 tightening screw, 5,6 ... Bearing, 7 ... Circuit board, 8 ...
… Rotating disk, 9 …… Light receiving part, 10 …… Light emitting part, 11 ……
Leaf spring, 13 ... board mounting screw, 14 ... leaf spring mounting screw,
15 …… Encoder mounting screw, 21 …… Coupling part, 22 …… Fixing part, 23 …… Peripheral part, 24,25 …… Ring, 26 …… Tap screw hole (conventional), 27 …… Tap screw hole (book) Invention), 30 ……
Bearing extraction jig, 40 ... Removal screw.

Claims (1)

[Claims] 1. A rotary disk which is fitted to a taper formed at an end of a shaft of a rotating body, is rotatably supported by a bearing supported by a fixed portion of an encoder, and transmits light from a light emitting portion according to the rotation thereof. Is provided with a cylindrical coupling portion, and a first tap hole is threaded in the axial direction of the coupling shaft forming the central axis of the coupling portion, and an encoder tightening having an outer diameter smaller than that of the first tap hole is provided. Insert the screw from the rotary disk mounting side of the first tap hole to the taper side, drill a second tap hole that engages with the tightening screw in the central axis of the taper, and screw the tightening screw into this. Then attach the encoder to the shaft, remove the tightening screw, and insert the removal screw that engages with the first tap hole of the coupling part into the taper side from the rotary disk mounting side of the first tap hole. , The tip of this removal screw Even after contact with the Yafuto end, Note encoder method detachable, characterized in that removing the by rotating the detaching screws in the traveling direction encoder.