JPS6214601Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe busbar connection and support mechanism that connects and supports pipe busbars.

FIG. 1 shows a schematic configuration diagram of a conventional pipe busbar connection and support mechanism, in which A is a front view thereof and B is a side view of a main part thereof. In the figure, reference numerals 1, 2, and 3 indicate busbar connection support members, which are composed of connection support parts 1A, 2A, and 3A, and leg parts 1B, 2B, and 3B.
3B, it is attached to the breaker fixed contact 8. Pipe busbars 7, 7A are inserted between the connection support parts 1A, 2A, 3A and the upper metal fitting 4, and are tightened by bolts 5, washers 5A, and springs 6 to be connected and supported. However, since the bus bar connection support members 1, 2, 3 and the upper metal fitting 4 are cast molded products, there are problems in that the product delivery time is long and the price is high.

In view of the above-mentioned points, it is an object of the present invention to provide a pipe busbar connection and support mechanism that eliminates the drawbacks of the prior art, has a simplified structure, provides reliable connection and support, and is easy to manufacture.

This purpose, according to the present invention, includes two U-bolts each having a U-shaped curved portion and threaded portions provided at both ends of the curved portion; two grooves provided in an arc shape on the outer circumferential surface for insertion into the inner surface of the curved portion of the U-bolt, and two grooves facing the grooves for line contact with the ends of the pipe generatrix, respectively. an upper metal fitting formed integrally by press working with two arcuate protrusions provided on the inner circumferential surface; another inner circumferential surface having an arcuate cross section; and an end of the pipe generatrix; Two other protrusions are provided in an arc shape on the other inner peripheral surface facing the protrusion so as to be in line contact with each other, and a hole through which the threaded part of the U bolt passes is formed by press working. This is achieved by providing an integrally molded busbar connection support member.

Next, one embodiment of the present invention will be described in detail based on the drawings.

Figure 2 is a schematic configuration diagram of an embodiment of the present invention;
The figure shows a partial sectional view in the direction of arrow P in FIG. 2, and FIG. 4 shows an enlarged view of section Q in FIG. 3. In FIGS. 2 to 4, parts having the same functions as those in FIG. 1 are designated by the same reference numerals. The busbar connection support mechanisms 9, 9A, 9B include busbar connection support members 10, 10A, 10B, upper metal fittings 11, and U that connect and support the pipe busbars 7, 7A of the R, S, and T phases, respectively.
It is composed of a bolt 12 and a nut 13.
The bus bar connection support members 10, 10A, 10B are formed as pressed products that are lighter and easier to manufacture than cast molded products, and have leg portions 15, 15A, 15B and a connection support portion 16. These legs 15, 15A, 1
The length and shape of 5B are appropriately selected, and the pipe busbars 7, 7 of the R, S, and T phases are
A is maintained at the required spacing and attached to the breaker fixed contact 8. The connection support portion 16 has an arcuate cross section and is provided with a hole 19 through which the threaded portions 17 provided at both ends of the U-bolt 12 can pass. The stop fitting 11 has an outer circumferential surface and an inner circumferential surface having an arcuate cross section, and two arc-shaped outer circumferential surfaces that are respectively inserted into the inner surface of the curved portion 18 of the U-bolt 12.
two grooves 21 and two protrusions 2 provided in an arc shape on the inner circumferential surface, facing the grooves 21 so as to be in line contact with the ends of the pipe busbars 7, 7A, respectively.
0 and are integrally molded by press working. At this time, since the protrusion 20 and the groove 21 are located at positions facing each other, they can be easily formed by press working. Further, on the inner circumferential surface of the connection support member 16, two other protrusions 14 are arranged in a circle opposite to the two protrusions 20 so as to be in line contact with the ends of the pipe busbars 7, 7A, respectively. Formed in an arc shape. Therefore, the ends of the pipe busbars 7, 7A or the upper metal fittings 11
When inserted from both sides between the connecting support part 16 and the U-bolt 12 and the nut 13, each end of the pipe bus bar 7, 7A is inserted into the connection support part 16 and the upper metal fitting 11, respectively. Due to the line contact by the respective protrusions 14 and 20, the pipe busbars 7 and 7A are electrically connected from one side to the other, and the connection between the busbars is reliably achieved.

As described above, according to the present invention, the outer circumferential surface and the inner circumferential surface have an arcuate cross section, and the two bolts are provided in an arcuate shape on the outer circumferential surface to be respectively inserted into the inner surface of the curved part of the U-bolt. and two protrusions provided in an arc shape on the inner circumferential surface facing the groove so as to be in contact with the ends of the pipe generatrix, respectively, are integrally formed by press working. another inner circumferential surface having an arcuate cross section, and two other inner circumferential surfaces provided in an arcuate shape on the other inner circumferential surface facing the protrusion so as to be in line contact with the ends of the pipe generatrix, respectively. By providing a busbar connection support member in which the protrusion of the U-bolt and the hole through which the threaded portion of the U-bolt passes are integrally formed by press working, the problems of the prior art are effectively solved, and the problems of the conventional casting are eliminated. Since the material is softer and easier to process than press processing, it is easy to manufacture, and in particular, it is easy to form the groove and the protrusion into an arc shape that is symmetrically located, and it is possible to form a line along with the other protrusions. This has the advantage that the connection and support of the pipe busbars through contact is reliable, and electrical continuity between the pipe busbars is ensured.

[Brief explanation of the drawing]

FIG. 1 shows a schematic configuration diagram of a conventional pipe busbar connection support mechanism, A is a front view thereof, B is a side view of the main part thereof, FIG. 2 is a schematic configuration diagram of an embodiment of the present invention, and FIG. This figure is a partial sectional view taken in the direction of arrow P in FIG. 2, and FIG. 4 is an enlarged view of section Q in FIG. 3. 7: Pipe busbar, 9, 9A, 9B: Busbar connection support mechanism, 10, 10A, 10B: Busbar connection support member, 11: Upper metal fitting, 12: U bolt, 16: Connection support part, 14, 20: Projection part.

Claims (1)

[Claims for Utility Model Registration] In a connection support mechanism that connects and supports the respective ends of two pipe busbars and provides conduction from one pipe busbar to the other pipe busbar, a U-shaped curved portion and a two U-bolts having threaded portions provided at both ends of the curved portion; an outer circumferential surface and an inner circumferential surface having arcuate cross sections;
two grooves provided in an arc shape on the outer circumferential surface to be respectively inserted into the inner surface of the curved portion of the bolt; and two grooves on the inner circumferential surface facing the grooves so as to be in line contact with the ends of the pipe generatrix, respectively. an upper metal fitting integrally molded by press working with two arcuate protrusions provided at the top; and a line contact with another inner circumferential surface having an arcuate cross section and an end of the pipe generatrix, respectively. two other protrusions provided in an arcuate shape on the other inner circumferential surface opposite to the protrusion, and a hole through which the threaded portion of the U bolt passes are integrally formed by press working. A pipe busbar connection support mechanism, comprising a busbar connection support member.