JPH07111888B2 - Power clip - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply clip used in a DC power supply device, a motor control center and the like.

[0002]

2. Description of the Related Art A conventional power supply clip used for connecting a power supply and a load is generally composed of two or four clip plates opposed to each other and biased by a spring. there were. Depending on the current value of the power supply, two clip plates or four clip plates were used.

FIG. 7 shows a power supply clip provided with such a conventional clip plate. A guide plate 101 made of sheet metal and having a U-shaped cross section is inserted into a sheet metal terminal 102 bent in an L shape, and a bolt 103 is inserted through the bolt 103 to fix it to an insulating molded body 104.
Two bent sheet metal plates 105 on both sides of 101
And the base end of the clip plate 105 is engaged with the terminal 102, the shaft 106 is inserted through the clip plate 105 and the guide plate 101, and the spring 107 is contracted at both ends of the shaft 106 to The bar member 108 can be sandwiched between the plates 105.

This clip plate 105 has one contact point for each bar member 108, and even if there are a maximum of four, the contact point is four.
The point is that the contact portion has a considerably high temperature rise, and in order to reduce the temperature of the contact portion, it is necessary to increase the pressure of the spring 107 that urges the contact portion in order to reduce the contact resistance. However, since there are many insertion and removal of the bar material 108 for the connection part such as the power source for maintenance, it is desired to reduce the load of the insertion and removal of the bar material 108 as much as possible. A major problem was how to optimize the temperature rise value, contact pressure, and insertion / removal load.

If such a power supply clip is constructed so as to adapt to a current value of about 300 A, the power supply clip will be considerably large and the required area of the connecting portion will be large.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the size of a power supply clip connecting a power supply section and a load side,
While improving the contact reliability of the contacts, we aim to reduce the insertion and extraction load. In addition, it is necessary to reduce the temperature rise to reduce the influence on the inside of the device and to secure the reliability from a large current to a small current by using one type of power supply clip.

Further, the deviation between the devices at the time of connection is unavoidable in manufacturing. The presence or absence of the absorption of the deviation causes a defect due to deformation of the clip plate. It is to provide a power supply clip that prevents them from occurring and improves the reliability of interconnection.

[0008]

To achieve the above object, in the present invention, the number of contacts having the same shape is increased to increase the number of contact points. By increasing the number of contact points, the current is shunted to reduce the amount of heat generation at each point, and in addition, a gap is provided in the thickness direction of the contact to serve as a cooling fin. The gap is provided by forming a step with one contactor, or by sandwiching a plate between the contacts. There is also a method of assembling. Contact reliability is improved by these methods and heat dissipation of the contact is also achieved.

Further, when the bar material of the bus bar for the power source is inserted into the contactor, an excessive load is generated and the contactor is deformed, so that proper contact cannot be obtained. Therefore, the present invention has a structure in which a protective groove is provided in the terminal at a position within the stress limit of the contactor to protect the contactor. Further, the connection part for transmitting a high current is also formed as a terminal part with the same shape.

When connecting the bar member to the contactor, it is important to absorb the deviation between the devices. For this reason, the shafts are penetrated through the stacked contactors, and the contactor tips are made to face each other by rotating the contactor about the left and right displacement of the device as the center to absorb the displacement. . This withstands the impact at the time of insertion of the bar material, and the contact element easily fits with the bar material of the mating partner, which does not impose a heavy burden on the contact element and enhances reliability.

[0011]

According to the present invention, since a plurality of contacts are overlapped with each other with a gap interposed between the contacts, the current is shunted by increasing the number of contact points, and the amount of heat generation at each point is lowered. Since a gap is provided in the thickness direction of the contact, it functions as a cooling fin.

Further, according to the present invention, since protective terminals are provided at the upper and lower ends of the superposed contacts and terminals for external connection are fixed, an excessive load is applied when the bar member is inserted into the contacts and the contact is made. It does not deform the child. Further, according to the present invention, since the stacked contacts are pivotally attached to the shaft provided in the insulating molded body at the central portion, and the receiving groove of the contacts can be rotated about the shaft, the power clip Even if the contactor and the bar member are arranged so as to deviate from each other, the tip of the contactor rotates about the axis, so that a large impact is not given to the contactor.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on a specific embodiment shown in the accompanying drawings. FIG. 1 shows an exploded perspective view of a power clip of the present invention. A plurality of thin plate contacts 1 are stacked, and the upper terminals 2 of the thick plate are arranged above and below the contact 1.
The lower terminals 3 are respectively arranged and fixed integrally by the caulking shaft 4, the shaft 5 is penetrated through the central portion thereof, and these are covered with the first insulating molded body 6 and the second insulating molded body 7.

The contact 1 is made of a rectangular conductive plate material, and a receiving groove 11 for receiving a conductive bar material of a thick plate material which is a power source bus bar is opened on the short side thereof to form a holding piece 12. . The receiving groove 11 is formed with a protrusion 13 near the opening,
The interval between the protrusion 13 and the protrusion 13 is set to be slightly smaller than the plate thickness of the bar member so that the bar member can be elastically clamped by the clamping piece 12. A hole for caulking that allows the caulking shaft 4 to pass through the thick plate portion 14.
17 and a hole 18 through which the shaft 5 passes are provided respectively.

The contactor 1 stacked on the base end side of the contactor 1
A thick plate portion 14 is formed to provide a gap between the contact 1 and the contact 1. The upper terminal 2 is formed of a conductive plate material thicker than the contact 1, and the base piece 15 to be stacked on the contact 1 is also formed in a rectangular shape like the contact 1, and is stacked on the base end side. Holding pieces 16 are vertically provided from both sides to hold the contact 1.
A protective groove 19 narrower than the receiving groove 11 is formed in a portion of the base piece 15 of the upper terminal 2 facing the receiving groove 11 of the contact 1, and a protective piece 20 is formed. The protective groove 19 also protrudes toward the base end like the receiving groove 11.
When the upper terminal 2 is superposed on the contact 1, the protective groove 19 of the upper terminal 2 entirely covers the receiving groove 11 of the contact 1, but only the narrowest part of the groove is the contact. 1 so that the protrusion 13 can be seen, that is, the protrusion 13 and the protrusion 13
The interval between the bar member 13 and the contactor 1 is set to be small so that the bar member and the contactor 1 are in sufficient contact with each other. Further, a caulking hole 22 through which the caulking shaft 4 is inserted and a hole 23 through which the shaft 5 is inserted are formed in the base end portion of the upper terminal 2.

The lower terminal 3 is formed of a conductive plate material thicker than the contact 1 like the upper terminal 2, and is provided with a protective groove 39 for protecting the receiving groove 11 of the contact 1 like the upper terminal 2. Set and protect pieces
30 is formed, and a protrusion 31 similar to that of the upper terminal 2 is formed near the opening of the protective groove 39, and the caulking shaft 4 is formed at the base end thereof.
A caulking hole 32 through which the shaft 5 passes and a hole 33 through which the shaft 5 passes are formed. A screw hole 34 for screwing the crimp terminal is formed at the base end of the lower terminal 3.

A first insulation molded body 6 and a second insulation molded body 6 for covering the assembly in which the contactor 1, the upper terminal 2 and the lower terminal 3 are assembled.
An insulating molded body 7 is provided. The contactor 1 is overlaid, and the upper terminal 2 and the lower terminal 3 are overlaid on the upper and lower sides thereof, respectively, and the caulking shaft 4 is inserted into the caulking holes 32, 17, 22
When the shaft 5 is passed through the holes 33, 18 and 23 and the caulking shaft 4 is caulked and integrated, it becomes as shown in FIG.

FIG. 3 shows a state in which the upper terminal 2, the contact 1 and the lower terminal 3 are integrated into a first insulating molded body 6 and a second insulating molded body 7. The protective groove 19 of the upper terminal 2, the receiving groove 11 of the contactor 1, and the protective groove 39 of the lower terminal 3 are exposed so that the bar material 35 can be received. Also,
The upper and lower ends of the shaft 5 have a first insulation molded body 6 and a second insulation molded body 7.
The upper terminal 2, the contact 1, and the lower terminal 3 are held by the shaft 5 so that they can be slightly rotated.

In the example shown in FIGS. 1, 2 and 3, the gap between the contacts 1 is provided by the thick plate portion 14,
As shown in FIG. 4, a thin plate-shaped spacer 41 may be interposed between the contactors 1 ′ and 1 ′. As described above, according to the present invention, the bar member 35 and the contactor 1 contact each other at a plurality of points, the current is shunted by increasing the number of contact points to reduce the heat generation amount at each point, and the thickness direction of the contactor A space is provided in the to serve as a cooling fin.

Also, as clearly shown in FIG.
The receiving groove 11 of the contactor 1 is covered with the protective groove 19 of the upper terminal 2 and the protective groove 39 of the lower terminal 3, and only the protrusion 13 of the contactor 1 is positioned inside, so that the bar member 35 is contacted. When inserting into the receiving groove 11 of the child 1, the sandwiching piece 12 of the contactor 1 is sufficiently protected. Further, when the bar member 35 is pulled out from the receiving groove 11, the holding piece 12 of the contactor 1 is also protected.

As shown in FIG. 6, when the bar member 35 of the power source bus bar is displaced from the receiving groove 11 of the contactor 1 of the power source clip, the contactor 1, the upper terminal 2 and The lower terminal 3 is rotated around the shaft 5 and shows the state in which the bar member 35 is received without difficulty.

[0022]

As described above, according to the present invention, a relatively inexpensive contactor can be formed by stacking a plurality of contactors, and a stable contactor can be used for applications from minute current to large current. It is possible to provide a clip for a power supply configured as described above, which can contribute to miniaturization of a conventional power supply unit, and improve electrical and mechanical reliability in connecting the power supply unit.

According to the present invention, a plurality of contacts, each of which has a bar material receiving groove formed on a plate material to form a sandwiching piece, are superposed on each other with a gap interposed therebetween. By increasing the current, the current is shunted to reduce the amount of heat generated at each point, and a gap is provided in the thickness direction of the contact to serve as a cooling fin. In addition, the present invention is a plate material is formed by engraving the receiving groove of the bar material to form a sandwiching piece, a plurality of contacts are overlapped with a gap between the contacts, and the upper and lower ends of the contacts are overlapped with each other. Since it has a protective groove to protect the receiving groove and the terminal for external connection is fixed,
An excessive load is not generated when the bar member is inserted into the contactor, and the contactor is not deformed.

Further, according to the present invention, a plurality of contacts, each of which has a bar material receiving groove formed on a plate material to form a sandwiching piece, are stacked and accommodated in an insulating molded body with a gap between the contacts. , The center of the stacked contacts is pivotally attached to the shaft provided in the insulating molded body, and the contact receiving groove of the contact is rotatable about the shaft. Even if the bar members of the working busbar are displaced, the contact can be rotated so that the deviation can be absorbed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a specific embodiment of a power clip of the present invention.

FIG. 2 is an exploded perspective view showing a state in which an upper terminal, a contact and a lower terminal are integrally assembled.

FIG. 3 is a perspective view showing a state in which an upper terminal, a contactor, and a lower terminal are assembled into a first insulating molded body and a second insulating molded body, and a part of which is sectioned.

FIG. 4 is an exploded perspective view of an example in which a gap is provided between contacts using a spacer.

FIG. 5 is a cross-sectional plan view showing a state where the receiving groove of the contact is protected by the upper terminal and the lower terminal.

FIG. 6 is a cross-sectional plan view showing a state in which when the bar member is displaced from the power supply clip, the contact pivots about the shaft to absorb the deviation.

FIG. 7 is a plan view, a front view, and a side view of a conventional power clip.

[Explanation of symbols]

 35 ... Plate-shaped bar material 11 ... Receiving groove 12 ... Clamping piece 1 ... Contact 2 ... Upper terminal 3 ... Lower terminal 19 ... Protective groove 39 ... Protective groove 5 ... Shaft 6 ... First insulation molded body 7 ... Second insulation molding body

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takashi Yamashita 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Katsuhiko Yamamoto 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (3)

[Claims] 1. A power supply clip for connecting a power supply unit used in a DC power supply device, a motor control center, etc. and a load side by sandwiching a plate bar member with a contactor,
A clip for a power supply, which is formed by stacking a plurality of contacts in which a receiving member for a bar member is engraved on a plate material to form a sandwiching piece with a gap between the contacts. 2. A power supply clip for connecting a power supply unit used in a DC power supply device, a motor control center, etc. and a load side by sandwiching a plate-shaped bar member with a contactor,
Protection that protects the contact groove of the contact at the upper and lower ends of the stack by stacking a plurality of contacts with engraving the receiving groove of the bar material on the plate material and forming a sandwiching piece with a gap between them A power supply clip that has a groove and is fixed to a terminal for external connection. 3. A power supply clip for connecting a power supply unit used in a DC power supply device, a motor control center, etc. and a load side by sandwiching a plate-shaped bar member with a contactor,
A plurality of contacts, in which plate material receiving grooves are formed on the plate to form a sandwiching piece, are stacked and housed in an insulating molded body with a gap between the contacts, and the stacked contacts are in the central part. A clip for a power source, which is pivotally attached to a shaft provided on an insulating molded body and is rotatable about the shaft of the receiving groove of the contact.