JPS5928569Y2 - Busbar - Google Patents

Description

[Detailed Description of the Invention] The present invention improves the shape of the bus bar used in the switchgear.

Conventionally, a band-shaped flat conductor is generally used as a bus bar.

In the connecting portion of such a bus bar, the end portions of the flat bus bars are stacked on top of each other and are connected by tightening nuts by passing bolts through bolt holes punched in the iron part.

Although this bolt tightening method is a reliable method, it has been found that the connection performance efficiency is not very good.

In other words, the ends of the busbar can be tightened with bolts with a certain tightening force, so many connections can be connected without any variation, but on the other hand, the contact surface is warped and distorted, and the true contact area is very small. There was a drawback.

The present invention solves the above-mentioned drawbacks by forming narrow knurling grooves in the length direction on the upper and lower surfaces of the bus bar.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a bus bar made of copper or aluminum, and thin knurled grooves 2 having a depth of 1 mm or less are formed in the upper and lower surfaces of the bus bar in the length direction.

This knurling groove 2 is preferably formed by forming a knurled groove type in an extrusion die of a mold for forming the bus bar, so that it is automatically formed when the bus bar is extruded.

As shown in FIGS. 3 and 4, the ends of the bus bar 1 are stacked one on top of the other, and bolts 3 are inserted into bolt holes punched at each end, and tightened with nuts 4. Fixed.

Therefore, the main proposal constructed as described above has the following effects.

That is, when connecting the bus bars 1 having the above structure, when the ends thereof are connected in the same direction, the knurled grooves 2 fit into each other as shown in FIG. 3, so that a benign connection is achieved.

@The knurling groove substantially increases the connection area.

Sliding and misalignment of the slopes of the zero-knurled grooves causes biting, resulting in a mechanically stable connection.

■When joining busbars 1 at right angles, the busbars are made of soft metal such as copper or aluminum, and the knurled grooves are, for example, 1 mm or less deep, so they bite into each other firmly without any gaps, and generally bolts Even though there is a gap between the hole and the bolt after installation, there is no risk of it shifting.

■As the surface area of the busbar increases due to the knurled grooves, the heat dissipation effect, or cooling performance, improves.

Alternatively, by increasing the contact area of the connection, the current density passing therethrough can be increased.

■The knurled grooves are arranged alternately along the entire length of the busbar, so you can cut it to an appropriate length and use it freely.
There is no need for grooving, notching, or bending each time.
It has various advantages such as being highly versatile and suitable for mass production.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the bus bar according to the present invention, Fig. 2 is an enlarged sectional view, Fig. 3 is a perspective view of the bus bar connected in the same direction, and Fig. 4 is a sectional view of the bus bar connected in the right angle direction. It is. 1...Bus bar, 2...Loretsu l-
i.

Claims (1)

[Scope of utility model registration request] A bus bar with a rectangular cross section made of soft metal such as copper or aluminum, with knurling grooves formed in parallel to the longitudinal direction over the entire top and bottom surfaces.