JP2004288444A - Breaker device, manufacturing method thereof and dummy plug therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve workability in assembling a breaker device. <P>SOLUTION: Fixed electrodes 13 are located in fitting-recesses 15 of a cover housing 12, respectively. The respective fixed electrodes 13 fit to dummy electrodes 40B by dummy plug 40 being fitted. This locates the fixed electrode 13 at the center position of the fitting-recess 15. Next, the fixed electrode 13 is fastened to the cover housing 12 by nut fastening with a bolt 18 and a nut 19A. This secures the fixed electrode 13 at the center position of the fitting-recess 15 in the cover housing 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a breaker device and the like which open and close a circuit by fitting / removing a movable electrode to / from a fixed electrode pair.
[0002]
[Prior art]
As this type of breaker device, as shown in FIG. 9, there is a breaker device including a breaker body 101 and a short-circuit plug 102. The breaker body 101 is composed of a pair of fixed electrodes 113 and a main body housing 110 having these fixed electrodes 113, while the short-circuit plug 102 has a movable electrode 123 fitted to the pair of fixed electrodes 113, And a plug housing 120 having an electrode 123.
By fitting these housings 110 and 120, the movable electrode 123 short-circuits the pair of fixed electrodes 113, and detaches both housings 110 and 120 to open the pair of fixed electrodes 113. For example, they are used in power circuits of electric vehicles, hybrid vehicles, and the like (see Patent Document 1).
[0003]
Now, this kind of breaker device is assembled as follows. First, four pin-shaped fixed electrodes 113 are arranged in a row on a base housing 111 constituting the main body housing 110, and the fixed electrodes 113 are passed through the insertion holes 114 of a cover housing 112 also constituting the main body housing 110, The base housing 111 and the cover housing 112 are fitted. When the fitting is completed, the fixed electrode 113 is held in a state housed in the fitting recess 115 of the cover housing 112.
The plug housing 120 is composed of a cover 121 and an electrode molded body 122 having a cylindrical movable electrode 123. By passing a connecting pin 124 through both 121 and 122, the electrode molded body 122 is attached to the cover 121. On the other hand, it is made to be able to move freely and to be in the retaining state.
Then, after the main body housing 110 is attached to the vehicle body, the plug electrode 120 is fitted into the main body housing 110 so that the movable electrode 123 is accommodated in the fitting recess 115 and is fitted to the fixed electrode 113. Between the fixed electrodes 113 (see FIG. 9).
[0004]
[Patent Document 1]
JP-A-2002-170449
[Problems to be solved by the invention]
By the way, in the above configuration, the fixed electrode 113 and the movable electrode 123 are attached to the housings 110 and 120 so as to be freely movable. Therefore, when the two housings 110 and 120 are fitted together, even if there is a misalignment of the axes of the two electrodes 113 and 123 (a state where the axes of the two 113 and 123 do not match in the fitting direction), the two electrodes 113 and 123 are not aligned. 123 are fitted while their respective axes move in directions that match each other.
As described above, the reason why both electrodes 113 and 123 are allowed to move is that if these electrodes are fixedly provided to the housings 110 and 120, the plug housing 120 is displaced when the electrodes 113 and 123 are displaced due to manufacturing errors. This is because it becomes impossible to fit the main body housing 110.
However, as described above, the electrodes 113 and 123 are allowed to move freely with respect to the housings 110 and 120 so that the electrodes 113 and 123 can be displaced and moved at the time of fitting to correct the positional displacement. The movement causes resistance. For this reason, it appears as fitting resistance, and there is a problem that fitting work becomes difficult.
[0006]
The present invention has been completed based on the above circumstances, and has as its object to improve workability when fitting a fixed electrode and a movable electrode.
[0007]
[Means for Solving the Problems]
According to another aspect of the present invention, there is provided a breaker device including a breaker body and a short-circuit plug fitted to the breaker body, wherein the breaker body includes a pair of fixed electrodes. The short-circuit plug is attached to the housing in an insulated state, and the short-circuit plug is attached to the main body housing, and is mounted on the housing and is fitted to the fixed electrodes to move between the fixed electrodes. In the method of manufacturing a breaker device including an electrode, a dummy housing portion corresponding to a plug housing of the short-circuit plug, and a dummy electrode portion provided integrally with the dummy housing portion and corresponding to a movable electrode of the short-circuit plug, Using the dummy plug having the dummy plug with the dummy electrode portion of the dummy plug fitted to the fixed electrode. Having features the fixed electrode fitted to the breaker body at that fixed to the body housing.
[0008]
According to a second aspect of the present invention, there is provided a breaker body in which a pair of fixed electrodes are mounted on a main body housing in an insulated state from each other, a dummy housing portion fitted to the main body housing, and provided integrally with the dummy housing portion. A dummy plug having a dummy electrode portion fitted to the both fixed electrodes, wherein the two fixed electrodes of the breaker main body are arranged in a state where the dummy electrode portion of the dummy plug is fitted to the fixed electrode. It is characterized in that it is fixed to the housing.
[0009]
According to a third aspect of the present invention, there is provided a breaker device including a breaker body and a short-circuit plug fitted to the breaker body, wherein the breaker body is configured by mounting a pair of fixed electrodes in a body housing in an insulated state. The short-circuit plug for a breaker device includes a plug housing fitted to the main body housing, and a fixed electrode attached thereto and fitted to the fixed electrodes to conduct between the fixed electrodes. A dummy plug having a dummy housing portion corresponding to a plug housing of the short-circuit plug, and a dummy electrode portion provided integrally with the dummy housing portion and corresponding to a fixed electrode of the short-circuit plug. Having.
[0010]
Function and effect of the present invention
In the present invention, the dummy electrode portion and the fixed electrode are fitted by fitting the dummy housing portion to the body housing, and the fixed electrode is fixed to the body housing in this state. Therefore, if the dummy electrode portion is manufactured so as to be at the correct position with respect to the dummy housing, the fixed electrode can be fixed at the correct position with respect to the main body housing, and the fitting resistance at the time of fitting can be reduced. Workability of the fitting operation can be improved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The breaker device according to the present embodiment is fixed in, for example, an engine room of an electric vehicle, and includes a breaker body 1 and a short-circuit plug 2 that can be fitted to the breaker body 1. The breaker body 1 is composed of a total of four fixed electrodes 13 connected to a power circuit (not shown) and a main body housing 10 on which the fixed electrodes 13 are mounted, while the short-circuit plug 2 is a movable electrode. 23, and a plug housing 20 to which the movable electrode 23 is attached. The movable electrode 23 is fitted to and detached from the fixed electrode 13 by fitting and detaching the plug housing 20 to and from the main body housing 10. The power circuit is opened and closed by permitting or blocking the current flow between the fixed electrodes 13 forming a pair. In addition, let the direction of arrow X be the right direction with reference to FIG.
[0012]
The main body housing 10 includes a base housing 11 fixed to a vehicle body of an automobile, and a cover housing 12 fixed to the base housing 11. The base housing 11 has a box shape, has an opening 11A on the upper surface, and has a terminal block 14 for screwing a crimp terminal T (this will be described later) inside the base. (See FIG. 1). The cover housing 12 has a substantially rectangular shape, and has four cylindrical fitting recesses 15 for accommodating the fixed electrodes 13 and the movable electrodes 23 formed at equal intervals in the left-right direction. The fitting concave portion 15 is formed with a large-diameter portion 15A having a relatively large diameter on the upper side and a small-diameter portion 15B having a relatively small diameter on the lower side with a tapered portion tapering downward. ing. A through hole 16 formed in the lower wall of the housing 12 is continuous with each fitting recess 15, and an opening surface of the communication hole 16 is smaller than a lower end surface of the fitting recess 15 (see FIG. 2). ).
[0013]
The fixed electrode 13 has a substantially columnar shape, and the diameter thereof is smaller than the diameter of the small diameter portion 15B of the fitting concave portion 15. A flange 17 having a diameter larger than the communication hole 16 is formed concentrically and integrally at the lower end of the fixed electrode 13, and a threaded bolt 18 is also formed concentrically below the flange 17. Is formed. By passing the fixed electrode 13 through the communication hole 16 from the fitting recess 15 side, the flange portion 17 is locked on the lower end surface of the fitting recess 15, and the fixed electrode 13 is housed in the fitting recess 15, and the bolt portion 18 is provided. Is exposed from the cover housing 12 to the outside. Two nuts 19A and 19B are screwed into the bolt portion 18, and a round crimp terminal T (hereinafter, referred to as a terminal T) attached to one end of the electric wire C is provided between the nuts 19A and 19B. It is sandwiched (see FIGS. 2 and 3). Terminals T are also attached to the other end of the electric wire C, and these are screwed to the terminal block 14.
Since the diameter of the bolt portion 18 is slightly smaller than the diameter of the bolt portion 18 so as to pass through the communication hole 16, the fixed electrode 13 is movable in the radial direction of the fitting recess 15.
[0014]
On the other hand, as shown in FIGS. 2 and 3, the plug housing 20 includes a cover 21 and two electrode mold bodies 22 housed in the cover 21. Each of the electrode mold bodies 22 is provided with two cylindrical electrode receiving portions 22A, each of which is formed in a line in the left-right direction at substantially equal intervals, and a seal ring 22B is formed on the outer peripheral surface of each electrode receiving portion 22A. Is provided. The outer diameter of each electrode housing 22A is substantially the same as the diameter of the large diameter portion 15A of the fitting recess 15, and the diameter of the seal ring 22B is larger than the diameter of the large diameter portion 15A. . Cylindrical movable electrodes 23 are respectively accommodated inside the electrode accommodating portions 22A, and the paired electrodes are connected to each other by short-circuiting pieces 23A to be in an electrically short-circuit state. The inner diameter of each movable electrode 23 is substantially the same as the outer diameter of the fixed electrode 13, and the outer diameter is smaller than the smaller diameter portion 15 </ b> B of the fitting recess 15. These movable electrodes 23 are fitted to two adjacent fixed electrodes 13, and when fitted, electrically short-circuit the pair of fixed electrodes 13. A single connecting pin 24 is passed through the connecting holes 21B and 22C formed in the electrode mold body 22 and the cover 21 so that the electrode mold body 22 is attached to the cover 21 in a state where it cannot be removed. .
The width dimension of the connection hole 22C is set to be larger than the outer diameter of the connection pin 24, and the electrode molded body 22 (that is, the movable electrode 23) moves the fixed electrode 13 and the movable electrode 23 is allowed to move in a direction perpendicular to the fitting / removing direction. That is, the axis of each movable electrode 23 is shifted from the axis of the fitting recess 15 in a direction orthogonal to the fitting direction.
In a state where the cover housing 12 and the plug housing 20 are fitted, the center position of the movable range of the movable electrode 23 matches the axis of the fitting recess 15.
[0015]
A hood portion 12A whose upper part is opened is formed in the cover housing 12, and a corresponding slit 25 for accommodating the hood portion 12A is formed in the plug housing 20. Accordingly, the plug housing 20 is guided by the hood portion 12A and can move in the direction along the fitting direction of the fixed electrode 13 and the movable electrode 23. Further, two cam followers 12B are protruded from the side wall along the longitudinal direction of the hood portion 12A (see FIGS. 2 and 3).
[0016]
The plug housing 20 is provided with a slider 30 that exhibits a cam function in cooperation with the cam follower 12B. The slider 30 includes two front and rear cam plates 31 each having a rectangular plate shape extending in the left-right direction, a connecting portion 32 for connecting one end portions of the two cam plates 31, and a handle portion integrally extending from the connecting portion 32. 33. The slider 30 is movable in the left-right direction by accommodating the cam plate 31 in the slit 25 of the plug housing 20. That is, the housings 10 and 20 can be moved in a direction orthogonal to the fitting / removing direction. The cam plate 31 is formed with a straight cam groove 34 oblique to both the moving direction of the slider 30 and the fitting / removing direction of the housings 10 and 20 (see FIG. 2).
[0017]
In the present invention, a dummy plug 40 as shown in FIG. 5 is used. The dummy plug 40 includes a dummy housing portion 40A and four cylindrical dummy electrode portions 40B extending from the lower end of the dummy housing portion 40A. These 40A and 40B are integrally formed of resin, and have substantially the same shape as the plug housing 20 as a whole. Further, each dummy electrode portion 40B is provided in the dummy housing portion 40A such that the axis thereof matches the axis of the fitting recess 15.
A slit 41 for accommodating the hood portion 12A of the cover housing 12 is formed in the dummy housing portion 40A, and a slider 30 is provided similarly to the plug housing 20, and is fitted to the cover housing 12 by a cam action. It is supposed to be.
The inside diameter of the dummy electrode portion 40B is substantially the same as the outside diameter of the fixed electrode 13, and the outside diameter is substantially the same as the diameter of the small diameter portion of the fitting concave portion 15. The length of the protrusion from the dummy housing portion 40A is slightly shorter than the length of the movable electrode 23 projecting from the cover 21 (see FIG. 5).
[0018]
The configuration of the present embodiment is as described above. Next, the procedure for assembling the breaker body 1 will be described.
First, the bolt portion 18 of the fixed electrode 13 is passed through the communication hole 16 from the fitting recess 15 side of the cover housing 12. Then, the dummy plug 40 is fitted into the cover housing 12 shallowly. Then, the cam follower 12 </ b> B enters the cam groove 34. At this time, by pushing the handle portion 33, the two 12 and 40 are fitted more deeply by the cam action, and accordingly, the dummy electrode portion 40 </ b> B is inserted into the fitting recess 15. And is pushed into the gap between the fixed electrode 13 and the small diameter portion 15B (see FIG. 6). In this state, the cam follower 12B and the cam groove 34 restrict the relative movement of the two 12, 40 in the separating direction. At this time, since the fixed electrode 13 and the dummy electrode portion 40B are fitted, the fixed electrode 13 is arranged at the center of the fitting recess 15.
When the nuts 19A are tightened to the bolts 18, the lower surface wall of the housing 12 is sandwiched between the flanges 17 and the nuts 19A, and the fixed electrode 13 is fixed to the cover housing 12. Thereafter, the terminal T provided on one end of the electric wire C is passed through the bolt portion 18 to fix the terminal T by tightening the nut 19B.
[0019]
Subsequently, the terminal T on the other end of the electric wire C is passed through the opening 11A of the base housing 11, and the terminal T is screwed to the terminal block 14 (see FIG. 7). Then, the cover housing 12 is fixed to the base housing 11 by placing the cover housing 12 over the opening 11 </ b> A and screwing the cover housing 12. Thereby, the assembly of the breaker body 1 is completed. Thereafter, the handle portion 33 of the dummy plug 40 is pulled to detach the dummy plug 40 from the cover housing 12 (see FIG. 8).
[0020]
When the short-circuit plug 2 is fitted to the assembled breaker body 1 as described above, the following is performed. If the movable electrode 23 of the short-circuit plug is displaced from the center position of the play range, the movable electrode 23 is aligned with the axis of the fixed electrode 13 when the two housings 12 and 20 are fitted. And is fitted to the fixed electrode 13. At this time, since the fixed electrode 13 is fixed at the center position of the fitting concave portion 15 of the cover housing 12, even if the movable electrode 23 is at the position farthest from the center of the play range, as in the related art, The amount of movement of the movable electrode 23 can be smaller than in the case where the fixed electrode 13 is mounted so as to be freely movable with respect to the cover housing 12. Thereby, the fitting resistance generated at the time of fitting can be reduced, and the workability of the fitting operation of the two housings 12, 20 can be improved.
[0021]
Note that if the dummy plug 40 is kept attached until the breaker body 1 is manufactured and mounted on the vehicle body, the fixed electrode 13 is shielded from the outside by the dummy plug 40. When mounting the housing 10 to the vehicle body, it is possible to prevent damage due to contact with a tool or the like.
[0022]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and furthermore, besides the following, within the scope not departing from the gist. Can be implemented with various modifications.
(1) In the above embodiment, the inner diameter and the outer diameter of the dummy electrode portion 40B are made the same as the outer diameter of the fixed electrode 13 and the diameter of the small diameter portion 15B of the fitting concave portion 15, respectively. The fixed electrode 13 is disposed at the center position of the fitting concave portion 15 by fitting the fixed electrode 13 without gap between the fixed electrode 13 and the small-diameter portion 15B of the fitting concave portion 15 as in the present embodiment. In the configuration in which the fixed electrode 13 is positioned by fitting the cover housing 12 and the dummy plug 40, the outer diameter of the dummy electrode portion 40B may be smaller than the diameter of the small-diameter portion 15B. .
[0023]
(2) Also, the nut 19A is fastened to the bolt portion 18 after the dummy plug 40 is fitted to the cover housing, and the fixed electrode 13 is fixed to the cover housing 12. The nut 19A may be screwed into the bolt portion 18 before fitting, and after the dummy plug 40 is combined with the cover housing 12, the nut 19A may be fully tightened.
[Brief description of the drawings]
FIG. 1 is a perspective view of the breaker device of the present embodiment. FIG. 2 is a cross-sectional view of a cover housing and a plug housing taken along line AA in FIG. 1. FIG. 3 is a cover housing and plug housing taken along line BB in FIG. FIG. 4 is a sectional view showing a fitted state of a cover housing and a plug housing. FIG. 5 is a sectional view of a dummy plug. FIG. 6 is a sectional view showing a fitted state of a dummy plug and a cover housing. FIG. 7 is a perspective view when fixing the cover housing to the base housing. FIG. 8 is a perspective view when fixing the cover housing to the base housing is completed. FIG. 9 is a cross-sectional view showing a configuration of a conventional breaker device. [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Breaker main body 2 ... Short circuit plug 10 ... Main body housing 12 ... Cover housing 13 ... Fixed electrode 15 ... Fitting concave part 15A ... Large diameter part 15B ... Small diameter part 17 ... Flange part 18 ... Bolt part 19A ... Nut 20 ... Plug housing 23 movable electrode 40 dummy plug 40A dummy housing part 40B dummy electrode part

Claims (3)

A breaker device comprising a breaker body and a short-circuit plug fitted to the breaker body, wherein the breaker body is configured by mounting a pair of fixed electrodes in a body housing in a state of being insulated from each other. A method for manufacturing a breaker device comprising: a plug housing fitted to a main body housing; and a movable electrode attached thereto and fitted to the fixed electrodes to conduct between the fixed electrodes.
A dummy housing portion corresponding to a plug housing of the short-circuit plug, and a dummy plug having a dummy electrode portion provided integrally with the dummy housing portion and corresponding to a movable electrode of the short-circuit plug,
Manufacturing the breaker device, wherein the dummy plug is fitted to the breaker body while the dummy electrode portion of the dummy plug is fitted to the fixed electrode, and the fixed electrode is fixed to the body housing. Method. A breaker main body in which a pair of fixed electrodes are attached to the main body housing in an insulated state,
A dummy housing portion fitted to the main housing, and a dummy plug having a dummy electrode portion provided integrally with the dummy housing portion and fitted to the fixed electrodes,
The breaker device, wherein the fixed electrodes of the breaker main body are fixed to the main body housing in a state where the dummy electrode portion of the dummy plug is fitted to the fixed electrode. A breaker device comprising a breaker body and a short-circuit plug fitted to the breaker body, wherein the breaker body is configured by mounting a pair of fixed electrodes in a body housing in an insulated state, and the short-circuit plug is A dummy plug for a breaker device comprising a plug housing fitted to the main body housing, and a fixed electrode attached thereto and fitted to the fixed electrodes to conduct between the fixed electrodes,
A dummy for a breaker device, comprising: a dummy housing portion corresponding to a plug housing of the short-circuit plug; and a dummy electrode portion provided integrally with the dummy housing portion and corresponding to a fixed electrode of the short-circuit plug. plug.

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