JPH0234768Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention [Industrial field of application] The invention provides a stable connection that is not affected by thermal expansion or contraction of the synthetic resin support member that fixes the wire harness to a vehicle panel, etc. This invention relates to an improved earth connection structure.

[Conventional technology]

As shown in Fig. 3a, the conventional ground connection structure of the wire harness W is to sandwich the flange c of the synthetic resin wire protector b between the ground terminal a and the vehicle panel P, and tighten them together with bolts or screws d. There are some that are fixed and grounded.
The same applies to the earth connection structure when instead of the gutter-shaped wire protector b, a split tube-shaped wire clip e is fixed with tape f as shown in FIG. 3b.

[Problem that the invention attempts to solve]

In the conventional connection structure, as shown in Fig. 4, the ground terminal a is connected to the vehicle body by bolting together with the flange of a support member such as a wire protector b, but the flange c is susceptible to temperature changes in the operating environment. The problem was that the bolts repeatedly contracted and expanded due to the vibration, and the bolts loosened due to the vibrations caused by the running of the vehicle, creating a gap V and incomplete grounding. To prevent this, tightening the bolts can be strengthened.
There is a risk that cracks may occur in the synthetic resin flange portion c, leading to damage.

The purpose of this invention is to solve the above-mentioned problems, and to provide a stable connection that is not affected by the expansion or contraction of the synthetic resin support member that fixes the wire harness, and that does not cause damage to the support member when tightening bolts, etc. The purpose is to provide a difficult to ground connection structure.

Structure of the invention [Means for solving the problem] As shown in FIGS. At least two protrusions 3 are provided on the outer periphery of the terminal plate portion 2a of the ground terminal 2, and a through hole 6 is provided in the flange portion 5 of the support member 4 for fixing the wire harness W to the vehicle panel P, etc. The protruding piece 3 is passed through, and the flange part 5 is connected to the terminal plate part 2 of the ground terminal 2.
It is characterized in that it is sandwiched between A and the vehicle panel P, etc., and fixed together by bolts or screws 7.

In the figure, 2b, 5a, and _P0 are through holes for bolts (or screws) provided in the ground terminal 2, flange portion 5, and vehicle panel P, respectively.

Although FIG. 1 shows an example in which two protrusions 3 are provided facing downward perpendicularly to the terminal plate surface, three or more protrusions 3 may be provided protruding radially from the center of the terminal plate portion 2a. The protruding length l of this protruding piece 3 from the terminal plate surface is:
The thickness is set to be slightly larger than the thickness t of the flange portion 5 of the support member 4 (l>t). The tip of the protruding piece 3 is preferably formed into an edge shape 3a.

The support member 4 is an example of a gutter-shaped wire protector having a wire lead-out groove 4a on one side wall, and a flange portion 5 formed integrally with the support member 4 is provided with through holes 6 in a number corresponding to the protrusions 3. . The same applies to the case where the above-mentioned electric wire clip (FIG. 3b) is used as the support member 4.

[Effect]

As shown in FIG. 2, the flange portion 5 is sandwiched between the ground terminal 2 and the vehicle panel P, and the bolts 7,
As before, by tightening the nut 8, the support member 4 is fixed and the ground connection is performed at the same time.

In addition, in the present invention, the tip of the protrusion 3 passed through the through hole 6 of the flange portion 5 is
Because of this, it comes into direct contact with the panel P. Therefore, even if the tightening force on the flange section 5 is loosened due to contraction and expansion of the flange section 5, the tightening force between the ground terminal 2 and the panel P does not change, and the ground connection is stable.

Furthermore, when tightening the bolts, the projecting piece 3 protruding from the through hole 6 acts as a cushion member for the flange portion 5 to prevent damage due to over tightening.
Furthermore, the tip of the protruding piece 3 is shaped into an edge shape 3 as described above.
By setting a, this will bite into or be crushed by the panel P by tightening the bolts, strengthening the contact force between the ground terminal 2 and the panel P, and providing a more stable ground connection state. Note that by pushing the protruding piece 3 of the earth terminal into the through hole 6 of the flange portion 5, the position of the terminal is also achieved, so that the workability of bolt tightening is also improved.

Effects of the Invention As explained above, the wire harness ground connection structure of the present invention prevents the synthetic resin support member of the wire harness, which is simultaneously fixed to a vehicle panel, etc., from being damaged due to excessive tightening, and A stable ground connection can be achieved without being affected by contraction or expansion due to temperature changes.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a typical example of the earth connection structure of the present invention in a separated state, Fig. 2 is a cross-sectional view of the main part of the assembled state of Fig. 1, and Fig. 3 a and b show conventional examples, respectively. The perspective view, FIG. 4, is a cross-sectional view of the main part of the assembled state shown in FIG. 3a. W...Wire harness, P...Vehicle panel,
DESCRIPTION OF SYMBOLS 1... Electric wire, 2... Earth terminal, 2a... Terminal plate part, 3... Projection piece, 4... Support member, 5... Flange part, 6... Through hole, 7... Bolt.

Claims (1)

[Scope of utility model registration request] At least two protrusions are provided oppositely on the outer periphery of the terminal plate of the ground terminal connected to the end of the electric wire constituting the wire harness, and a through hole is provided in the flange of the support member that fixes the wire harness to a vehicle panel, etc. A wire harness earth connection structure, characterized in that a flange portion is provided between the terminal plate portion of the earth terminal and the vehicle panel, etc., and the flange portion is clamped together with bolts or screws.