JP2001030198A - Micro-part connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting device to prevent the increase in an axial length after assembly even when a rotary shaft is extended through a joining element part during assembly of microparts using a joining element. SOLUTION: A first joining element 3 having a protrusion-form or a recess- form taper surface is situated at a first micro-part 1 and a second joining element 4 having a recess-form or a protrusion-form taper surface engaged with the protrusion-form or the recess-form tape surface is situated at a second micro-part 2. Permanent magnets 5 and 6 attracted during engagement between the first and second joining elements 3 and 4 are situated at the first and the second joining element 3 and 4. The first micro-part 1 is provided with a rotary shaft coupled to the second micropart 2, and the first and the second joining element 3 and 4 are provided in their respective central part with through holes through which the respective rotary shafts are inserted, and at least the through hole 8 of at least the first joining element 3 of the through holes is also functioned as a bearing to support the rotary shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a micro component connecting device, and more particularly to a micro component connecting device for mechanically connecting two micro components without performing precise positioning.

[0002]

2. Description of the Related Art As a conventional micro component connecting device for mechanically connecting micro components, for example, there has been one shown in FIGS. FIG. 11 is a cross-sectional view showing a state immediately before connection of a conventional micro component connection device, and FIG.
FIG. 13 is a cross-sectional view showing a state after connection of the conventional micro component connection device, FIG. 13 is a perspective view of the first micro component side in FIG. 11, and FIG. 14 is a first micro component side shown in FIG. It is a top view of the joining element part provided in the component.

In these figures, reference numeral 1 denotes a first micro component, and 2 denotes a second micro component connected to the first micro component 1. Reference numeral 3 denotes a first bonding element having a convex tapered surface 3a provided on the first micro component 1, that is, a male bonding element. Reference numeral 4 denotes a second bonding element provided on the second micro component 2. That is, it is a female junction element. The joining elements 3 and 4 are made of a non-magnetic material such as copper, and the female joining element 4 is provided with a concave tapered surface 4a that engages with the convex tapered surface 3a of the male joining element 3. ing. 5
Is a permanent magnet having an N-pole surface provided on each of the male bonding element 3 and the female bonding element 4, and 6 is a male bonding element 3
And the surface provided on each of the female bonding elements 4 is an S-pole permanent magnet. These permanent magnets 5 and 6 have conductivity and also serve as electrodes of the first and second micro components 1 and 2. ing. 7 is each permanent magnet 5, 6 and each joining element 3, 4
Is an insulating material provided between

The N-pole permanent magnet 5 and the S-pole permanent magnet 6 have a circular arc shape in plan view, and are respectively formed on the male joint element 3 and the female joint element 4 so as to form a circle on a plane. 2
The N permanent magnets 5 and the S permanent magnets 6 in the male bonding element 3 and the female bonding element 4 are symmetrically disposed (the permanent magnets 5, 6 in the male bonding element 3). 14 for the arrangement of). Therefore, in the female joint element 4, the S-pole permanent magnet 6 is arranged at a position corresponding to the N-pole permanent magnet 5 of the male joint element 3,
An N-pole permanent magnet 5 is arranged at a position corresponding to the S-pole permanent magnet 6 of the male joint element 3.

Therefore, when connecting the male bonding element 3 and the female bonding element 4 as shown in FIG.
When the micro component 1 and the second micro component 2 are brought close to each other, the permanent magnets 5 and 6 having different polarities embedded in the joining elements 3 and 4 attract each other and the micro component is positioned in the circumferential direction. Done. At this time, the relative positional relationship in the radial direction is accurately matched by the engagement of the tapers 3a, 4a of the joining elements 3, 4.
In this manner, the first micro component 1 and the second micro component 2 are connected by the magnetic attraction of the permanent magnets 5 and 6 as shown in FIG. Since the insulating material 7 is disposed around the permanent magnets 5, 6, the permanent magnets 5, 6
Are also used as electrodes, and electric power and electric signals are supplied through the permanent magnets 5 and 6.

[0006]

The conventional male or female bonding elements 3 and 4 are composed of a first micro component 1 and
This is effective when the second micro-parts 2 operate mechanically individually. However, for example, the driving mechanism is not used as in the case where the first micro-part 1 is a motor and the second micro-part 2 is a reduction gear. In such a case, in order to connect the rotating shaft of the motor to the speed reducer, a through hole for passing the rotating shaft through the central portion of each of the male joint element 3 and the female joint element 4 is provided. Must be provided. However, when these through-holes are merely for allowing the rotary shaft to penetrate, the rotary shaft becomes longer by the length of these through-holes, and the first
There is a problem that the length in the axial direction after joining the micro component and the second micro component becomes large, and the micro property is impaired.

The present invention has been made by paying attention to such problems existing in the prior art. It is an object of the present invention to provide a micro component connecting apparatus in which the axial length after assembly does not increase even when a rotary shaft is passed through a joining element portion when assembling a micro component using the joining element.

[0008]

In order to achieve the above object, the present invention provides a first bonding element having a convex or concave tapered surface provided on a first micro component;
A second bonding element provided on the micro component and having a concave or convex tapered surface engaging with the convex or concave tapered surface; and the first bonding element provided on each of the first and second bonding elements. In a micro component connection device comprising a device and a permanent magnet attracted when engaged with the second joining device, the first micro component has a rotating shaft connected to the second micro component, Each of the first and second joining elements has a through hole at each central portion for penetrating the rotating shaft, and at least the through hole of the first joining element also serves as a bearing for supporting the rotating shaft. It was done.

Further, the present invention may be configured such that the two through holes of the first and second joining elements also serve as a bearing for supporting the rotating shaft.

Further, according to the present invention, the through-hole serving also as the bearing of the first or both joining elements can be subjected to a modification treatment on an inner peripheral surface thereof to improve the wear resistance of the inner peripheral surface. . Here, the reforming treatment refers to a treatment for modifying the surface layer portion of the inner peripheral surface of the through hole so as to provide the inner peripheral surface of the through hole with excellent wear resistance.

In the present invention, the through hole serving also as the bearing of the first or both joining elements has a surface film formed on an inner peripheral surface thereof, and a friction coefficient of the inner peripheral surface is reduced. You can also.

[0012]

Embodiments of the present invention will be specifically described below with reference to the drawings. In each of the embodiments described below, the same or corresponding parts as those in the related art shown in FIGS. 11 to 14 are denoted by the same reference numerals, and description thereof will be simplified.

Embodiment 1 FIG. First, a first embodiment will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the micro component connection device according to the first embodiment immediately before connection, and FIG. 2 is a cross-sectional view of the micro component connection device after connection. FIG. 3 is a top view of the first junction element (male junction element) according to the first embodiment, and FIG. 4 is a sectional view taken along line IV-IV in FIG.

In these figures, the first micro component 1
Is a micromotor provided with a rotating shaft (not shown) in this embodiment. Also, the second micro component 2
This is a reduction gear connected to the rotating shaft. A first joining element 3 attached to the first micro component 1 (ie, male joining element 3) and a second joining element 4 attached to the second micro component 2 (ie, female joining element 4) Each of them has through holes 8 and 9 for penetrating the not-shown rotation shaft of the first micro component 1. The through hole 8 is configured to be fitted to the rotation shaft of the first micro component 1 so as to support the rotation shaft. On the other hand, the through-hole 9 is provided so that the rotation axis of the first micro component 1 can be coupled to the second micro component 2, and the rotation axis of the first micro component 1 is non-contact. And it is formed in a dimension that can be inserted with a certain gap.

When the male and female joint elements 3, 4 are placed in the relative positional relationship shown in FIG. 1, they are attracted by the attractive force of the N-type and S-type permanent magnets 5, 6, and 2
As shown in the figure, the convex tapered surface 3a and the concave tapered surface 4a are engaged and connected. At this time, the hole 8 at the center of the male joining element 3 functions as a bearing for supporting the rotation axis of the first micro component 1. The through hole 9 at the center of the female joint element 4 functions as a hole only for penetrating the above-mentioned rotating shaft (not shown). As described above, since the through hole 8 functions as a bearing for supporting the rotating shaft of the first micro component 1, a bearing to be provided in the first micro component 1 can be omitted.

Embodiment 2 Next, a second embodiment will be described with reference to FIGS. FIG. 5 is a cross-sectional view of the micro component connection device according to the second embodiment in a state immediately before connection, and FIG. 6 is a cross-sectional view of the micro component connection device in a state after connection. Embodiment 2
The through hole 9 of the second joint element 4 in the first embodiment is used as a bearing for the rotating shaft of the first micro component 1 in the same manner as the through hole 8 of the first joint element 3 in the first embodiment. Embodiment 1 is that the through hole 10 functions.
The other points are the same as those of the first embodiment.

Therefore, in the second embodiment, the through-hole 8 provided in the male bonding element 3 and the through-hole 10 provided in the female bonding element 4 correspond to the rotating shaft of the first micro component 1. It functions as a bearing, and with this configuration, a bearing to be provided on the first micro component 1 can be omitted.

Embodiment 3 Next, a third embodiment will be described with reference to FIGS. FIG. 7 is a cross-sectional view in a state immediately before connection of the micro component connection device according to the third embodiment, and FIG. 8 is a cross-sectional view in a state after connection of the micro component connection device. Embodiment 3
In the first embodiment, the inner peripheral surface of the through hole 8 of the first junction element 3 in the first embodiment is subjected to a modification process, and as shown in FIGS. 7 and 8, the inner peripheral surface of the through hole 8 is modified. The point that the processing layer 11 is formed is different from the first embodiment, and the other points are the same as the first embodiment. For example, when the material of the male bonding elements 3 and 4 is a nonmagnetic steel, the reforming process is performed by performing ion beam mixing of titanium nitride, chromium nitride, or the like on the surface layer of several microns.

Therefore, the through-hole 8 in the third embodiment has the reforming layer 11 formed on the inner peripheral surface thereof, and thus acts as a bearing for supporting the rotating shaft of the first micro component 1. Therefore, the amount of wear is reduced, and the rotation of the rotating shaft of the first micro component 1 can be held smoothly for a long period of time.

In the third embodiment, the through-hole 9 provided at the center of the female bonding element 4 is formed by the first micro component 1 in the same manner as in the second embodiment shown in FIGS.
In this case, the inner peripheral surface of the through-hole functioning as the bearing may have the same modification as that of the through-hole 8 in the third embodiment. Processing may be performed.

Embodiment 4 FIG. Next, a fourth embodiment will be described with reference to FIGS. FIG. 9 is a cross-sectional view of the micro component connection device according to the fourth embodiment in a state immediately before connection, and FIG. 10 is a cross-sectional view of the micro component connection device in a state after connection. In the fourth embodiment, the coating process is performed on the inner peripheral surface of the through hole 8 of the first bonding element 3 in the first embodiment, and FIGS.
As described in the first embodiment, the point that the surface film 12 having a small friction coefficient is formed is different from the first embodiment, and the other points are the same as the first embodiment. For example, when the material of the male and female bonding elements 3 and 4 is copper, nickel-phosphorus electroplating or vapor deposition of titanium, chrome, silicon nitride, etc. is performed to form a surface coating having a small coefficient of friction. To form a film having a thickness of

Therefore, the through hole 8 at the center of the male bonding element 3 has a surface coating 1 having a small coefficient of friction on its inner peripheral surface.
Since the second micro component 2 is formed, when acting as a bearing for the rotary shaft of the first micro component 1, its friction coefficient is reduced, and the rotation of the rotary shaft of the first micro component 1 becomes smooth.

In the fourth embodiment, the through-hole 9 provided at the center of the female bonding element 4 is formed by the first micro component 1 as in the second embodiment shown in FIGS.
In this case, the inner peripheral surface of the through-hole functioning as the bearing may have a coefficient of friction similar to that of the through-hole 8 in the fourth embodiment. May be formed.

In each of the above embodiments, the first joining element 3 provided on the first micro component 1 is provided with the convex tapered surface 3a, and the second joining element 4 provided on the second micro component 2 is provided. Although the concave tapered surface 4a is provided on the first bonding element 3, the first bonding element 3 may be provided with a concave tapered surface and the second bonding element 4 may be provided with a convex tapered surface.

[0025]

The present invention is configured as described above, and has the following effects. The present invention provides a first bonding element provided with a convex or concave tapered surface provided on a first micro component, and a first bonding element provided on a second micro component and engaging with the convex or concave tapered surface. A second joining element having a concave or convex tapered surface, and a permanent magnet provided on each of the first and second joining elements and attracted when the first joining element and the second joining element are engaged. A micro component connection device comprising:
The micro component has a rotating shaft connected to the second micro component, and the first and second joining elements have through holes through the rotating shaft at respective central portions, and at least the Since the through-hole of the first joining element was formed to have a structure also serving as a bearing for supporting the rotating shaft,
The bearing to be provided on the first micro component having the rotating shaft can be omitted. Therefore, even if the rotation axis of the first micro component is passed through the joining element when the micro component connecting device is connected, the axial length after assembling the micro component does not increase.

Further, when the through hole at the center of the two joining elements to be joined is also used as a bearing for supporting the rotating shaft of the first micro component, the bearing area is increased, and more stable. The rotation axis of the first micro component can be supported.

In addition, since the inner peripheral surface of the through hole also serving as the bearing is modified to improve the wear resistance of the inner peripheral surface, the amount of wear when the rotating shaft of the first micro component rotates is improved. Can be kept small, and the rotation of the rotating shaft can be held smoothly for a long period of time.

Further, since a surface film is formed on the inner peripheral surface of the through hole also serving as the bearing, and the friction coefficient of the inner peripheral surface is reduced, the friction coefficient when the rotating shaft of the first micro component rotates is reduced. It can be kept small, and the rotation of the rotating shaft becomes smooth.

[Brief description of the drawings]

FIG. 1 is a sectional view of a micro component connection device according to Embodiment 1 of the present invention immediately before connection.

FIG. 2 is a cross-sectional view after connection of the micro component connection device according to the first embodiment of the present invention;

FIG. 3 is a top view of an I-th junction element (male junction element) according to Embodiment 1 of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a cross-sectional view of a micro component connection device according to Embodiment 2 of the present invention immediately before connection.

FIG. 6 is a cross-sectional view of the micro component connection device according to Embodiment 2 of the present invention after connection.

FIG. 7 is a sectional view of a micro component connection device according to Embodiment 3 of the present invention immediately before connection.

FIG. 8 is a cross-sectional view of the micro component connection device according to Embodiment 3 of the present invention after connection.

FIG. 9 is a sectional view of a micro component connection device according to Embodiment 4 of the present invention immediately before connection.

FIG. 10 is a cross-sectional view after connection of a micro component connection device according to a fourth embodiment of the present invention.

FIG. 11 is a cross-sectional view of a conventional micro component connection device immediately before connection.

FIG. 12 is a cross-sectional view of a conventional micro component connection device after connection.

FIG. 13 is a perspective view of a first micro component side of the micro component connection device shown in FIG. 11;

FIG. 14 is a plan view of a first bonding element portion provided in the first micro component illustrated in FIG. 13;

[Explanation of symbols]

1 first micro component, 2 second micro component,
3 first bonding element (male bonding element), 3a convex tapered surface, 4 second bonding element (female bonding element), 4
a concave tapered surface, 5 N-pole permanent magnet, 6
S pole permanent magnet, 7 insulating material, 8, 10 through hole (also serving as bearing), 9 (through rotary shaft) through hole, 11 modified layer, 12 surface coating.

Claims (4)

[Claims] 1. A first joining element having a convex or concave tapered surface provided on a first micro component, and being engaged with the convex or concave tapered surface provided on a second micro component. A second joining element having a concave or convex tapered surface, and a permanent magnet provided on each of the first and second joining elements and attracted when the first joining element and the second joining element are engaged. Wherein the first micro component has a rotating shaft connected to the second micro component, and the first and second joining elements penetrate the central portion through the rotating shaft. A micro component connection device having a hole, wherein at least the through hole of the first joining element among the through holes has a structure also serving as a bearing for supporting the rotating shaft. 2. The micro component connecting device according to claim 1, wherein the two through holes of the first and second joining elements have a structure also serving as a bearing for supporting the rotating shaft. 3. The through-hole, which also serves as the bearing of the first or both joining elements, has its inner peripheral surface modified to improve the wear resistance of the inner peripheral surface. 1
The connecting device of the micro component as described above. 4. The through-hole, which also serves as the bearing of the first or both joining elements, has a surface film formed on an inner peripheral surface thereof to reduce a coefficient of friction of the inner peripheral surface. 3. The connection device for a micro component according to 1 or 2.