JPH0321165Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a termination portion of a low impedance cable in which the termination portion is miniaturized.

[Conventional technology]

In order to minimize the voltage drop due to impedance, the low impedance cable has R, S, and T phase insulated core wires R, S, and T as shown in Figure 3.
S and T are twisted together to form a unit group, a plurality of these groups are twisted together with an inclusion a, and a sheath b is provided on top of the unit group.A conventional example of the terminal end of this cable P is shown in Fig. 4. As in, cable P
Strip off the sheath b and insulator at the terminal end of the sheath b, fix the sealant container 1 to the end of the sheath b with adhesive tape 2, untwist the insulated core wires R, S, and T to remove the inclusion a. The insulated core wires R, S, and T are bundled for each phase, the terminal plate 3 is fixed, and the sealant 4 is poured into the sealant container 1.

[Problem that the invention attempts to solve]

To form the terminal end of the conventional low impedance cable P as described above, the insulated core wires R, S, and T are bundled for each phase outside the cable sheath b, and the sealant container 1 is fixed. It is something. For this reason, the shape and dimensions especially in the length direction become large, and when molding space is limited, for example, as shown in Fig. 5, the cable P rising from the GL should be immediately connected to the terminal in the motor terminal box 5 In some cases, it becomes extremely difficult to mold the end portion.

The purpose of the present invention is to reduce the size of the terminal part to solve the above problem.

[Means for solving problems]

In order to solve the above problems, in the present invention, the R-phase, S-phase, and T-phase insulated core wires are twisted together to form a unit group, and a plurality of the groups are twisted together with an inclusion, and the surroundings are At the terminal portion of a low impedance cable covered with a sheath, the sheath is divided from the end edge by a longitudinal cut, and each of the insulated core wires is divided into R phase, S phase, and T phase.
A heat-shrinkable tube is bundled into each phase and connected to a terminal plate for each phase, and a heat-shrinkable tube is tightly attached around the divided portion of the sheath to the uncut portion, and a sealing material is applied to the cavity inside the tube. It was designed to be filled with.

[Effect]

At the terminal end of the present invention as described above, the insulated core wires are untwisted and bundled within the sheath for each phase, so the shape and dimensions are only slightly enlarged in the radial direction and the seal is sealed. Since no agent container is used, the terminal end can be made smaller.

〔Example〕

Next, embodiments of the present invention will be described with reference to the accompanying drawings FIGS. 1 to 3.

The insulated core wires R, S, and T of the R phase, S phase, and T phase are set as a unit group 10, and as shown in FIG. Cuts 11 are made in the length direction at 3 to 4 places in the sheath b' at the end of the low impedance cable P made by
The cable P is divided into four parts, and a heat-shrinkable tube 12 having a length extending from the divided part b' to a part of the undivided sheath b is inserted in advance from the end of the cable P, and the sheath b' of the divided part is expanded to remove the inclusion a. The twisted insulated core wires R, S, and T are untwisted and twisted to form the R, S, and T phase insulated core wires R, S, and T, respectively, as shown in FIG. The insulated core wire R,
A terminal plate 3 is fixed to the conductor exposed by peeling off the end insulation of S and T, and a terminal insulation reinforcing portion is formed by wrapping adhesive polyethylene tape or adhesive vinyl tape around the connection portion.

Next, the heat shrink tube 1 inserted in advance is
After aligning the end of 2 with the end of sheath b', heat-shrinking the heat-shrinkable tube 12 that covers the undivided part of sheath b to bring it into close contact with sheath b, and adjusting the insulated core wires R, S, and T extending upward. , a sealing material 13 such as epoxy resin is injected into the internal gap of the heat-shrinkable tube 12 through its opening to provide watertightness to the heat-shrinkable tube 1.
2 is heated to bring it into close contact with the sheath b' and the sealing material 13.

Since the terminal portion configured in this way has the insulated core wires R, S, and T converged within the sheath b', its shape and dimensions are only slightly larger in the radial direction. For this reason, the shape of the terminal portion, especially in the length direction, is shorter than that of the conventional one, which is advantageous in the case shown in FIG. 5.

[Effect of idea]

As is clear from the above explanation, according to the present invention, since a sealant container is not used, the shape and dimensions of the end portion are small, and construction can be performed even in places where the space for processing the end portion is small, which reduces costs. However, the number of parts is reduced, which is an advantage.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of one embodiment of the present invention;
The figure is an enlarged partial cutaway of the main part of Figure 1, and Figure 3 is a partial cutaway of the main part of Figure 1.
Cross-sectional view of the low impedance cable in Figure 4
The figure is a partially cutaway front view of the terminal end of a conventional low impedance cable, and FIG. 5 is a diagram showing the state of motor terminal connections. R, S, T...Insulated core wire, a...Inclusion, b...
...Sheath, b'...Split sheath, P...Cable,
3...Terminal board, 11...Notch, 12...Heat shrink tube, 13...Sealing material.

Claims (1)

[Scope of utility model registration request] In the terminal part of a low-impedance cable, the R-phase, S-phase, and T-phase insulated core wires are twisted together to form a unit group, a plurality of these unit groups are twisted together with an inclusion, and the surroundings are covered with a sheath, The sheath is divided into a plurality of parts by longitudinal cuts from the edge, and each of the insulated core wires is divided into an R phase, an S phase, and an S phase.
A heat-shrinkable tube is tightly attached around the divided portion of the sheath and the uncut portion of the sheath. An end portion of a low impedance cable characterized by being filled with a sealing material.