resolver

Abstract

To provide means for easily assembling a resolver with a pair of insulation caps without using an insert mold.SOLUTION: A resolver 1 has a plurality of magnetic poles 40 projected from a ring-shaped core 31, has a pair of first and second insulation caps 33 and 44 sandwiching and covering the magnetic poles 40 and first and second surfaces 31A and 31B of the ring-shaped core 31, and has a rotor inside the ring-shaped core 31. A terminal insulation cap 56 having a terminal 34 is locked with a first snap fit portion 55 disposed in the first insulation cap 33, and the first insulation cap 33 having a terminal insulation cap 56 is locked with the second insulation cap 44 via a second snap fit portion 50.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a resolver, and more particularly to a new improvement for fixing terminals via snap-fit ​​portions to a terminal holder with connector provided on a part of an annular core serving as a stator. [Background technology]

[0002] As a resolver of this type that has been used conventionally, for example, the structure disclosed in FIG. 5 of "Resolver Stator Structure" in Patent Document 1 is shown in FIG. That is, an undercover 33 having a U-shaped cross section is provided at the end of the annular core 31, and a plastic body 35 made of plastic that holds a terminal pin 34 is provided on the upper surface of the undercover 33. A protrusion 34a of the terminal pin 34 protrudes upward through the plastic body 35, and an end of the coil 32 is connected to this protrusion 34a. A lead wire 37 connected to a connector 36 is crimped and connected to the terminal pin 34, and is drawn out to the outside of the annular core 31. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-200007 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional resolvers, configured as described above, have had the following problems. In other words, in conventional connector-integrated resolvers, in order to avoid poor contact due to sliding wear caused by relative movement of the terminals when the mating connector is mated, the connector and insulator (insulating cap) required the core and terminals to be insert-molded. This insert molding method does not allow for process division, and various metal fittings required as connectors must be placed in the mold cavity beforehand, which has the biggest problem of increasing the manufacturing cost of the resolver. Furthermore, in order to reduce manufacturing costs, if the insulator is made cap-shaped and the terminals are assembled later, the terminals cannot be fixed in place, which causes friction between the terminals when the mating connector is mated, posing a quality risk of poor contact.

[0005] The present invention has been made to solve the above-mentioned problems, and in particular, to provide a resolver in which terminals are fixed to a terminal holding portion with a connector provided on a part of a ring-shaped core via a snap-fit ​​portion. [Means for solving the problem]

[0006] A resolver according to the present invention has a plurality of magnetic poles protruding from an annular core, the magnetic poles and first and second faces of the annular core are sandwiched and covered by a pair of first and second insulating caps, and the resolver has a rotor inside the annular core.The resolver has a structure in which a terminal insulating cap having a terminal is engaged with a first snap-fit ​​portion provided on the first insulating cap, and the first insulating cap having the terminal insulating cap is engaged with the second insulating cap via a second snap-fit ​​portion, the first and second snap-fit ​​portions are structured to be non-detachable, a wedge of the second insulating cap is structured to lock the first snap-fit ​​portion, and the second insulating cap is structured to have a terminal cover for covering the terminal. [Effects of the Invention]

[0007] The resolver according to the present invention is configured as described above, and therefore has the following advantages. That is, in a resolver having a plurality of magnetic poles protruding from an annular core, the magnetic poles and the first and second faces of the annular core being sandwiched and covered by a pair of first and second insulating caps, and having a rotor inside the annular core, a terminal insulating cap having a terminal is engaged with a first snap-fit ​​portion provided on the first insulating cap, and the first insulating cap having the terminal insulating cap is engaged with the second insulating cap via a second snap-fit ​​portion, so that the terminal holding portion of the resolver can be easily assembled without using insert molding, and sufficient rigidity can be obtained due to the engaging structure of the pair of snap-fit ​​portions. Furthermore, since the first and second snap-fit ​​portions are of the retaining type, the insulating terminal cap and the second insulating cap can be reliably fixed without using adhesive or the like. Furthermore, the wedge of the second insulating cap locks the first snap-fit ​​portion, thereby ensuring reliable engagement of the insulating terminal cap without using adhesive. Furthermore, the second insulating cap is provided with a terminal cover for covering the terminal, thereby making it possible to protect the fixed terminal. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a plan view of a main part of a resolver according to an embodiment of the present invention; [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 3 is a side view showing the terminal insulating cap of FIG. 2. [Figure 4] FIG. 1 is a cross-sectional view showing a conventional resolver. DETAILED DESCRIPTION OF THE INVENTION

[0009] In the resolver according to the present invention, the terminals are fixed to the terminal holder with connector provided on a part of the annular core via a snap fit portion. [Example]

[0010] Hereinafter, preferred embodiments of a resolver according to the present invention will be described with reference to the drawings. In addition, the same reference numerals will be used to denote the same or equivalent parts as those in the conventional example. In FIG. 1, the terminal holder 60 of the resolver 1 has a plurality of magnetic poles 40 protruding inward from the annular core 31 of the terminal holder 60, each of which has a stator winding 43 wound thereon. 1, a second insulating cap 44 is fitted onto the first insulating cap 33 via the annular core 31, and the annular core 31 is configured to be sandwiched between the first insulating cap 33 and the second insulating cap 44. In other words, the magnetic pole 40 and the first and second surfaces 31A, 31B of the annular core 31 are sandwiched and covered by the pair of first and second insulating caps 33, 44. A terminal cover 45, which will be described later, is disposed on the rear of the second insulating cap 44. A rotor 41 is disposed inside the annular core 31.

[0011] Next, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and details of FIG. 1 will be described. A hook-shaped first snap fit portion 55 is integrally formed on the first insulating cap 33, and the second snap fit portion 50 is formed to have spring properties and is formed to prevent it from coming off. A terminal insulating cap 56 having a terminal 34 is provided adjacent to the first snap-fit ​​portion 55 housed in the second insulating cap 44, and the terminal insulating cap 56 is positioned in a guide hole 57 formed in the annular core 31 and is fixed by the first snap-fit ​​portion 55. The first snap-fit ​​portion 55 is formed as a hook-type retainer. The first snap-fit ​​portion 55 is biased and fixed to the insulating terminal cap 56 by a wedge 44b integrally formed with the second insulating cap 44.

[0012] The second snap-fit ​​portion 50, which is a protrusion for forming a well-known snap-fit ​​mechanism, is integrally formed on the outer periphery of the first insulating cap 33. The second snap-fit ​​portion 50 has a trapezoidal shape having a tapered portion 33A as a whole, and is formed so that the engaging member 44a of the second insulating cap 44 passes over the tapered portion 33A and is engaged with an engaging portion 33B.

[0013] The second snap fit portion 50 is formed by the tapered portion 33A, the engaging member 44a, and the locking portion 33B, and the engaging member 44a is of a retaining type that will not come off again once it engages with the locking portion 33B.

[0014] An end wire 43a of the stator winding 43 wound around the magnetic pole 40 is wound around the terminal 34, thereby forming the resolver 1. 3 shows a terminal insulating cap 56 formed integrally with the terminals 34. As shown in FIG. The second insulating cap 44 is provided with a terminal cover 45 for covering the terminals 34 . That is, in the resolver according to the present invention, a terminal insulating cap 56 having a terminal 34 is engaged with a hook-shaped first snap-fit ​​portion 55 provided on the first insulating cap 33, and the first insulating cap 33 with the terminal insulating cap 56 installed therein is engaged with the second insulating cap 44 via the second snap-fit ​​portion 50. [Industrial Applicability]

[0015] The resolver according to the present invention can be assembled using an insulating terminal cap having a pair of insulating caps and terminals, without using insert molding, thereby significantly reducing manufacturing costs compared to conventional methods. [Explanation of symbols]

[0016] 1 resolver 31 Annular Core 31A 1st page 31B 2nd side 33 First insulating cap 33A Tapered section 33B Locking part 34 terminals 36 Connectors 40 magnetic poles 41 Rotor 43 Stator Winding 43a Edge line 44 Second insulating cap 44a engaging member 44b Wedge 45 Terminal cover 50 Second snap fit part 55 First snap fit part 56 Terminal insulating cap 57 Guide hole 60 Terminal holding part

Claims

1. A resolver (1) having a plurality of magnetic poles (40) protruding from an annular core (31), the magnetic poles (40) and first and second faces (31A, 31B) of the annular core (31) being sandwiched and covered by a pair of first and second insulating caps (33, 44), and having a rotor (41) inside the annular core (31), A resolver characterized in that a terminal insulating cap (56) having a terminal (34) is engaged with a first snap-fit ​​portion (55) provided on the first insulating cap (33), and the first insulating cap (33) having the terminal insulating cap (56) is engaged with the second insulating cap (44) via a second snap-fit ​​portion (50).

2. 2. The resolver according to claim 1, wherein the first and second snap-fit ​​portions (55, 50) are of a retaining type.

3. 3. The resolver according to claim 1, wherein the wedge (44b) of the second insulating cap (44) locks the first snap-fit ​​portion (55).

4. 2. The resolver according to claim 1, wherein the second insulating cap (44) is provided with a terminal cover (45) for covering the terminals (34).

5. 3. The resolver according to claim 2, wherein the second insulating cap (44) is provided with a terminal cover (45) for covering the terminals (34).

6. 4. The resolver according to claim 3, wherein the second insulating cap (44) is provided with a terminal cover (45) for covering the terminals (34).

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