JP2019152569A - Resolver having liquid discharge passage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent liquid leakage when a package type resolver is attached to a rotating device such as a car so as not to adversely affect the terminal pins of the resolver. SOLUTION: A resolver having a liquid discharge passage according to the present invention is used by connecting a rotor (7) of a resolver (20) provided at a central position of a ring-shaped holder (1) to a rotor of the resolver (20). , The liquid collected on the terminal pin (11) side of the resolver (20) via the rotating shaft is discharged to the atmosphere side through the through hole (70) of the ring-shaped holding body (1), and each terminal pin (11) is discharged. Electrical continuity can be ensured. [Selection diagram] Fig. 1

Description

  The present invention relates to a resolver having a liquid discharge passage, and more particularly to a novel improvement for discharging liquid from a rotating device accumulated on the resolver terminal side to the outside through a through hole.

  Conventionally used resolvers having this type of liquid discharge passage are not disclosed in actual literature, and the configuration of a large resolver is disclosed in Patent Document 1.

JP 2009-229115 A

Since the resolver having the conventional liquid discharge passage is configured as described above, the following problems exist.
That is, in the case of Patent Document 1, although not shown, the lid body is provided with a cable holding body for holding the lead wire connected to the stator winding, thereby facilitating signal transmission / reception. It can be carried out. On the other hand, in recent years, in an industrial robot or the like, when the rotating shaft connected to the resolver rotor is in an apparatus having liquid, the liquid infiltrates from the annular stator and the terminal pin into the terminal pin. As a result, oxidation occurred at each terminal pin, causing electrical failure.

  The present invention has been made to solve the above-described problems, and in particular, a liquid discharge passage configured to discharge the liquid from the rotating device accumulated on the terminal side of the resolver to the outside through the through hole. An object of the present invention is to provide a resolver having the same.

  A resolver having a liquid discharge passage according to the present invention includes a ring-shaped stator for forming a resolver integrally including a plurality of projecting magnetic poles projecting inward at predetermined angular intervals, and a ring-shaped holding for integrally holding the ring-shaped stator. A body, a terminal pin holding portion that protrudes from a part of the ring-shaped holding body and holds a terminal pin, a first airtight elastic body that is provided on the first end surface and the second end surface of the ring-shaped holding body, Two airtight elastic bodies, and a through hole formed on the inner side of the first airtight elastic body of the annular holding body and on the terminal pin holding portion side, and formed at the center of the annular stator, The liquid collected around the terminal pin through the rotor gap for accommodating the rotor is configured to be discharged to the outside of the annular holding body through the through hole, and The ring-shaped holder has a predetermined thickness. The ring-shaped stator and the terminal pin are formed by insert molding, and the resolver is closely fixed to a predetermined position of the rotating device via the second airtight elastic body. And a cover body is provided so as to cover the first airtight elastic body of the ring-shaped holding body, and the terminal pin is a lower linear portion of the first airtight elastic body. The first airtight elastic body and the second airtight elastic body are different in shape from each other, and the rotating device includes When the rotor of the resolver rotates with rotation and the rotating device rotates left and right around the axis of the rotor, only one terminal pin is positioned above the liquid level position, or the terminal Only two pins before A configuration in which only three terminal pins are positioned above the liquid level position, or all the terminal pins are positioned in the liquid below the liquid level position. It is.

Since the resolver having the liquid discharge passage according to the present invention is configured as described above, the following effects can be obtained.
That is, a ring-shaped stator for forming a resolver integrally having a plurality of projecting magnetic poles projecting inward at predetermined angular intervals, a ring-shaped holding body that integrally holds the ring-shaped stator, and one of the ring-shaped holding bodies A terminal pin holding portion that protrudes into the portion and holds the terminal pin, a first airtight elastic body and a second airtight elastic body that are provided on the first end surface and the second end surface of the ring shaped holding body, and the ring shape. And a through hole formed on the inner side of the first airtight elastic body of the holding body and on the terminal pin holding portion side, and is formed at the center of the ring-shaped stator and has a rotor gap for accommodating the rotor The liquid collected around the terminal pin is discharged to the outside of the ring-shaped holding body through the through hole, so that the liquid around the terminal can be discharged even when the rotating device is inclined. To the outside through the through hole Out it is possible to it is possible to discharge the rust of the terminals to the outside.
Moreover, the ring-shaped stator can be insert-molded by having a configuration in which the ring-shaped stator and the terminal pins are insert-molded so as to have a predetermined thickness.
Further, the resolver itself is brought into close contact with one surface of the rotating device via the first hermetic elastic body by the resolver being closely fixed to a predetermined position of the rotating device via the second hermetic elastic body. Can do.
In addition, since the cover body is provided so as to cover the first airtight elastic body of the ring-shaped holding body, it is possible to prevent intrusion of dust or the like entering from the opposite surface of the resolver.
In addition, since the resolver is provided by providing a plurality of the through holes along the linear direction of the lower linear portion of the first airtight elastic body, even when the rotating device is rotated and inclined, The liquid can be discharged to the outside by any of the remaining through holes.
Further, the first airtight elastic body and the second airtight elastic body are different in shape from each other, so that the adhesiveness with the cover body provided on the outside is good and the resolver can be sufficiently protected. .
In addition, when the rotor of the resolver rotates with the rotation of the crankshaft of the rotating device, and the rotating device rotates to the left and right around the axis of the rotor, only one terminal pin is moved from the liquid level position. Positioned above, or only two terminal pins are positioned above the liquid level position, or only three terminal pins are positioned above the liquid level position, or all the terminal pins are By adopting a configuration in which the liquid is positioned below the liquid surface position, liquid adhesion around the terminal pin can be easily discharged to the outside.

It is a perspective view which shows the front side of the resolver which has a liquid discharge channel | path by this invention. It is a perspective view which shows the back surface of FIG. It is a perspective view which shows the non-wearing state of the 2nd airtight elastic body of FIG. It is a perspective view at the time of actually injection-molding the structure of FIG. It is a perspective view at the time of actually injection-molding the structure of FIG. FIG. 5 is a perspective view showing a state in which a cover body is mounted on the first airtight elastic body in the state of FIG. 4. It is a state figure showing the state where liquid is discharged from a through hole in the initial state when the resolver of the present invention is provided in the rotating device. It is a state figure which shows the state which the rotation apparatus provided with the resolver of this invention inclined. FIG. 9 is a state diagram showing a state where the rotating device is further tilted from FIG.

  The resolver having the liquid discharge passage according to the present invention is particularly configured to be able to discharge the liquid from the rotating device accumulated on the resolver terminal side to the outside through the through hole.

A preferred embodiment of a resolver having a liquid discharge passage according to the present invention will be described below with reference to the drawings.
In addition, the same code | symbol is demonstrated to the part which is the same as that of a prior art example, or an equivalent part.
1 and 2 are perspective views of a preferred embodiment of a resolver having a liquid discharge passage according to the present invention, and the rotor 7 of the resolver 20 is connected to a part of the rotating device 50 shown in FIGS. 1 is a perspective view showing the front side of the resolver 20, and FIG. 2 is a perspective view showing the back side of FIG.

  As described above, the ring-shaped holding body 1 of the resolver 20 in FIG. 1 is configured in a horseshoe shape or a front rear circular ridge shape as viewed from above, and a plurality of attachments are attached to the outer peripheral edge of the ring-shaped holding body 1. Holes 60 are formed, and the resolver 20 can be fixed to the rotating device 50 using the mounting holes 60.

  A first airtight elastic body 10 having the same shape is fitted and fixed in a front groove 61 having a shape of a front rear circular ridge formed in the annular holding body 1 of the resolver 20 in FIG. A ring-shaped stator 3 having a large number of projecting magnetic poles 3A projecting in the direction is fitted into a ring-shaped stator hole 62 inside the surface groove 61.

A stator winding 2 (not shown) consisting of an excitation winding and an output winding (not shown) is wound around each projecting magnetic pole 3A projecting integrally inside the ring-shaped stator 3, and its end line (not shown) ) Is wound around a plurality of terminal pins 11 arranged along the inside of the lower straight portion 10a of the first airtight elastic body 10 located in the vicinity of the terminal pin holding portion 12 of the ring-shaped holding body 1. Yes.
A rotor 7 described later is rotatably disposed in a rotor gap 1A formed in a circular shape inside each protruding magnetic pole 3A of the annular stator 3.

A second airtight elastic body 10A having a substantially triangular shape used when the resolver 20 is installed in a part of the rotating device 50 shown in FIGS. 3 to 6 is provided outside the annular stator 3 of the annular holding body 1. ing.
As shown in FIG. 1, at least one through hole 70 is formed inside the first airtight elastic body 10 of the ring-shaped holding body 1 and in the vicinity of the terminal pin 11 of the terminal pin holding portion 12.

  Next, as shown in FIGS. 1 to 6, when the resolver 20 is attached to the above-described rotating device 50, the ring-shaped holding member together with the second airtight elastic body 10 </ b> A is attached to the rotating device 50 as shown in FIG. The second end face 1 </ b> B of the body 1 is attached with a bolt (not shown) through the attachment holes 60.

Next, the first airtight elastic body 10 is fitted into the front groove 61 of the ring-shaped holding body 1, and the rotor 7 of the resolver 20 with respect to a rotation shaft (not shown) protruding into the rotor gap 3 a of the ring-shaped stator 3. Are attached concentrically.
Thereafter, as shown in FIG. 6, a cover body 90 having a front-rear-circular shape similar to that of the first airtight elastic body 10 is fixed to the first airtight elastic body 10 with an adhesive or the like, A space is formed inside the cover body 90.

In the state described above, the shaft (not shown) of the rotating device rotates, and at the same time, the rotor 7 also rotates.
Due to the rotation of the shaft, the liquid in the rotating device enters the resolver 20 side through the shaft, and the terminal pin 11 in the terminal pin holding portion 12 also comes into contact with the liquid.

  If each terminal pin 11 comes into contact with the liquid in the above-described state, the terminal pin 11 is corroded and the function as a connector is lost. Therefore, the liquid naturally diffuses through the through hole 70. It is discharged to the outside and the function as a connector can be maintained. In this case, the actual rotating device 50 is omitted because it cannot be disclosed.

The gist of the resolver having the liquid discharge passage according to the present invention is as follows.
That is, a ring-shaped stator 3 for forming a resolver 20 integrally having a plurality of projecting magnetic poles 3A projecting inward at predetermined angular intervals, a ring-shaped holding body 1 that integrally holds the ring-shaped stator 3, and A terminal pin holding portion 12 that protrudes from a part of the ring-shaped holding body 1 and holds the terminal pin 11, and a first airtight elastic body that is provided on the first end surface 1A and the second end surface 1B of the ring-shaped holding body 1 and forms a ring shape. 10 and a second airtight elastic body 10A, and a through hole 70 formed on the inner side of the first airtight elastic body 10 of the annular holding body 1 and on the terminal pin holding portion 12 side, The liquid formed around the terminal pin 11 through the rotor gap 3 a for accommodating the rotor 7 is formed at the center of the ring-shaped stator 3, and the liquid outside the ring-shaped holding body 1 passes through the through hole 70. To be discharged into The ring-shaped holding body 1 has a structure in which the ring-shaped stator 3 and the terminal pin 11 are insert-molded so as to have a predetermined thickness, and the second air-tight elastic body 10A is interposed therebetween. The resolver 20 is closely fixed to a predetermined position of the rotating device 50, and a cover body 90 is provided so as to cover the first airtight elastic body 10 of the ring-shaped holding body 1. The terminal pin 11 is provided in a plurality along the linear direction of the lower straight portion 10a of the first airtight elastic body 10, and the first airtight elastic body. 10 and the second hermetic elastic body 10 </ b> A are different in shape from each other, and the rotor 7 of the resolver 20 rotates with the rotation of the rotating device 50, and the rotating device 50 is connected to the rotor 7. The axis When tilted to the left and right, only one of the terminal pins 11 is positioned above the liquid level G, or only two of the terminal pins 11 are positioned above the liquid level G, or Only three of the terminal pins 11 are located above the liquid level position G, or all the terminal pins 11 are located in the liquid below the liquid level position G.

  In the resolver having the liquid discharge passage according to the present invention, the first and second airtight elastic bodies are provided on both end faces of the annular holding body having the resolver, and the rotor is connected to the shaft of the liquid rotating device to rotate the rotation angle of the rotating shaft. When the rotation device is inclined, the liquid that has entered the terminal pin side of the resolver can be discharged to the atmosphere side through the through hole.

DESCRIPTION OF SYMBOLS 1 Ring-shaped holding | maintenance part 1A 1st end surface 1B 2nd end surface 2 Stator winding 3A Projection magnetic pole 3a Rotor space | gap 7 Rotor 10 1st airtight elastic body 10A 2nd airtight elastic body 10a Lower linear part 11 Terminal pin 12 Terminal pin holding 20 Resolver 50 Rotating device 60 Mounting hole 61 Front groove 62 Ring-shaped stator hole 70 Through hole 90 Cover body G Liquid surface position

Claims (7)

An annular stator (3) for forming a resolver (20) integrally having a plurality of projecting magnetic poles (3A) projecting inward at predetermined angular intervals, and an annular shape for integrally holding the annular stator (3) A holding body (1), a terminal pin holding portion (12) that protrudes to a part of the ring-shaped holding body (1) and holds the terminal pin (11), and a first end face (1A) of the ring-shaped holding body (1) ) And the second airtight elastic body (10A) and the second airtight elastic body (10A) which are provided on the second end face (1B) and have a ring shape, and the first airtight elastic body of the ring-shaped holding body (1). A through hole (70) formed on the inner side of (10) and on the terminal pin holding portion (12) side, and
The liquid accumulated around the terminal pin (11) through the rotor gap (3a) for accommodating the rotor (7) is formed at the center of the ring-shaped stator (3). ) To be discharged to the outside of the ring-shaped holding body (1), and a resolver having a liquid discharge passage.   The liquid discharge passage according to claim 1, wherein the ring-shaped holding body (1) has a structure in which the ring-shaped stator (3) and the terminal pin (11) are insert-molded so as to have a predetermined thickness. Having a resolver.   The liquid discharge passage according to claim 1 or 2, wherein the resolver (20) is closely fixed to a predetermined position of the rotating device (50) through the second airtight elastic body (10A). Having resolver.   The liquid discharge according to any one of claims 1 to 3, wherein a cover body (90) is provided so as to cover the first airtight elastic body (10) of the ring-shaped holding body (1). A resolver having a passage.   The terminal pin (11) is provided in a plurality along the linear direction of the lower straight portion (10a) of the first airtight elastic body (10). A resolver having the liquid discharge passage described in 1.   The resolver having a liquid discharge passage according to any one of claims 1 to 5, wherein the first airtight elastic body (10) and the second airtight elastic body (10A) have different shapes. .   When the rotor (7) of the resolver (20) rotates with the rotation of the rotating device (50), and the rotating device (50) tilts left and right around the axis of the rotor (7), the terminal Only one pin (11) is located above the liquid level position (G), or only two terminal pins (11) are located above the liquid level position (G), or the terminal Only three pins (11) are positioned above the liquid level position (G), or all the terminal pins (11) are positioned in the liquid below the liquid level position (G). A resolver having a liquid discharge passage according to claim 6.

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