JPS63289324A - Shaft connecting joint between motor and detector - Google Patents

Abstract

PURPOSE:To obtain a shaft connecting joint manufactured easily at a low cost and with high reliability by erecting bending pieces bent in the orthogonal direction to a metal plate surface and in mutually reverse directions between the adjacent protruding surfaces on both side edges of each protruding portion of a cross-shaped metal plate. CONSTITUTION:Slits 16 with the same length are provided from each corner of a square metal plate 10 in the diagonal direction and the inner corner portions thereof are denoted with P1-P4, and when the intersections between the straight lines passing through the points P1 and P2, and through P3 and P4 and the sides of the metal plate 10 are denoted with points P5, P8, P9, P12 and the intersection between the straight line passing through the points P1 and P4, and through P2 and P3 and the sides of the metal plate 10 are denoted with points of P6, P7, P10, P11, the points P5, P8, P9, P12 form a rectangular area with end areas 12a, 12c and the points P6, P7, P10, P12 form a rectangular area with end areas 12b and 12d and both rectangular areas form a cross consisting of elements orthogonally crossing each other. Then, when four pieces of triangular areas 14a are bent to this side and the remaining four pieces of triangular areas 14b are bent to the other side, a shaft connecting joint is formed. By the process, the joint is usable even if the central axis lines of axes S1, S2 do not coincide with each other, and the problem with respect to the accuracy is solved by making the bent angles of the bent lines to be increased toward the ends.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coupling joint that couples an output shaft of a motor to a rotation shaft of a detector that detects the rotational position and rotational speed of the output shaft.

[Prior Art and Problems] Conventionally, an Oldham joint has been used as a joint for coupling the output shaft of a motor to the rotation shaft of a detector that detects the rotational position and rotational speed of the output shaft. The advantage of this Oldham joint is that even if the rotation center axes of the two shafts do not match, rotation can be transmitted effortlessly from one shaft to the other. However, when manufacturing this Oldham joint, cutting work is required, and the width of the convex part that connects to the shaft is several microns in order to eliminate looseness caused by the gap between it and the groove of the shaft during rotation transmission. required precision on the order of . Therefore, manufacturing takes a long time and is expensive.

Therefore, in order to solve these problems, the present invention aims to provide a shaft coupling joint that is easy to manufacture, inexpensive, and highly reliable.

[Means for solving problems]

In view of the above-mentioned object of the invention, the present invention provides a cross-shaped sheet metal with a cross-shaped sheet metal having four convex portions. The present invention provides an axially coupled joint in which bent pieces are vertically bent in opposite directions.

[For production]

In the combination of two sets of opposing convex parts each consisting of four convex parts of the above-mentioned cross-shaped sheet metal, the four bent pieces formed by bending on the side edge of one of the combined convex parts are attached to the sheet metal. These four bent pieces are connected to the motor output shaft, and the four bent pieces on the side edge of the other combined convex portion It is erected in another direction that is opposite to that direction, and is connected to the rotating shaft of the detector. As a result, this axial coupling joint performs the same function as a conventional Oldham joint.

〔Example〕

The present invention will be described in more detail below based on embodiments shown in the accompanying drawings. Fig. 1 is a perspective view of the axial coupling joint according to the present invention, Fig. 2 is a developed view of the axial coupling joint shown in Fig. 1, and Fig. 3 is two examples of axial coupling using the axial coupling joint of Fig. 1. FIG.

Referring to FIG. 2, a method of manufacturing a shaft joint using a square sheet metal 10 made of phosphor bronze, which has strong wear resistance, will be explained. Slits 1G of the same length are provided diagonally from the four corners of a square sheet metal 10. The internal corners of these four slits 1G are points PI, P2. P3. Set it as P4.

The intersection of the straight line passing through these points P1 and P2, and also the points P3 and P4, and the side of the square sheet metal 10 is P5. P8゜P9. P.I.
3, and the intersections of the straight line passing through points P1 and P4 and points P2 and P3 and the sides of the square sheet metal 10 are P6, P7, P
IO, pH. 4 points P5゜P8. P9. PI3 is 2
Two end regions form one rectangular region 12a, 12c, and the other four points P6゜P7, PIO, pH
form another rectangular area, which are two end areas 12b, 12d. In this embodiment, these two rectangular areas form a cross shape orthogonal to each other.

The slits 16 do not necessarily have to be arranged in the diagonal direction of the sheet metal 10, nor do the lengths of the four slits I6 need to be the same. These are the engagement grooves 20, 22 (
It is determined depending on design factors such as the respective width dimension values of FIG. 3) (which may also be a retaining convex portion). Furthermore, the two grooves 20 and 22 provided on the two axes S1 and 82 may not be orthogonal but may be obliquely intersected at other angles. Corner PI of slit 16, P2. P3. What is necessary is to determine the position of P4.

The above four end regions 12a, 12b, 12c
, 12d and the four slits 16 adjacent to the respective end regions, for example, the four triangular regions 1 adjacent to the end regions 12a and 12C
4a toward the front perpendicular to the plane of the paper in FIG. 2, and the remaining four triangular regions 14b are bent toward the other side perpendicular to the plane of the paper to form the shaft coupling joint shown in FIG. In this case, the aforementioned four end regions 12a.

12b, 12c, 12d are convex portions 12a, 12
b, 12c, 12d, and 8 triangular areas 1
4a and 14b become bent pieces 14a and 14b.

Point P6゜P7 of the axial coupling joint formed as described above,
4 corresponding to one rectangular area constituting PLO, pH
The triangular bent pieces 14b are inserted into and engaged with a groove 20 provided in, for example, the output shaft S1 of the motor, as shown in FIG.

The other point P5. P8. P9° Four triangular bent pieces 14a corresponding to other rectangular areas constituted by PI3 are inserted into and engaged with the groove 22 provided in the rotation axis S2 of the detector. In this way, it becomes possible to replace the conventionally used Oldham joint. That is, it can be used even if the central axes of the two axes St and S2 do not match. Furthermore, regarding the accuracy that was a problem when manufacturing conventional Oldham joints, the bending angle of the bending line of the axially coupled joint according to the present invention, for example, the line connecting point P3 and PIO or the line connecting point P4 and pH, has been improved. This can be solved by bending the opposing bent pieces 14b at an angle that corresponds to the light spreading distance, rather than making them at right angles. In this way, the bent piece 14b is tightly fitted into the groove 20 (6). That is, the groove 20 is formed using the bending reaction force of the bent piece 14b.
This is to avoid gaps between the shaft and the shaft. The same applies to the other bent pieces 14a and the other grooves 22.

Note that two axes 31. It is also possible to adopt a configuration in which a convex portion of the engaging portion is provided on both S2 or only one shaft, and the convex portion is held between the bent pieces of the shaft coupling joint of the present invention as the shaft coupling means. In this case, contrary to the above case, by bending the opposing bent pieces at an angle such that the intervals are tapered to each other, the convex portion can be tightly clamped without requiring excessive processing precision. becomes. As shown in FIG. 2, in this embodiment, a square sheet metal 10 is used to manufacture the shaft coupling joint, but it is also possible to use a rectangular sheet metal, a circular sheet metal, or the like. Furthermore, in order to produce the axially coupled joint according to the invention, a punching press step is required for punching out individual sheet metal contour shapes (for example, squares) from a wide sheet metal material and forming slits, and a punching press step for bending the folded pieces. It can be performed only by press processing, such as a press process. Therefore, mass production is possible and costs can be reduced.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it can be manufactured by press working a sheet metal, and moreover, by appropriately adjusting the bending angle of the bent piece, the engaging part of the coupled shaft can be easily formed. It is possible to engage without any gaps, so
It is possible to provide a shaft coupling joint between a motor and a detector that is highly reliable, easy to manufacture, and low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a axial coupling joint according to the present invention, Fig. 2 is an exploded view of the axial coupling joint not shown in Fig. 1, and Fig. 3 shows two axial couplings using the axial coupling joint of Fig. 1. Example side view. 10... Square sheet metal, 12a, 12b, 12c, 12d = convex portion, 14a, 14b... bent piece, 16...
Slit, 31...output shaft of the motor, S2...rotation axis of the detector.

Claims (1)

[Claims] 1. Both side edges of each of the four convex portions of the sheet metal formed in a cross shape are bent in a direction substantially perpendicular to the sheet metal, and in opposite directions between adjacent convex portions. The bent pieces bent in one direction relative to the sheet metal are connected to the output shaft of the motor, and the bent pieces bent in the other direction are detected. A shaft coupling joint between a motor and a detector, characterized in that it is connected to a rotating shaft of a device.