JP2594945Y2 - Bolt type connector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt-type connector in which a pair of connectors are fitted by tightening bolts and nuts.

[0002]

2. Description of the Related Art Conventionally, there has been known a connector for mutually connecting electrical components by fitting a male connector and a female connector to each other. This connector is widely used in automobiles, and with the sophistication and complexity of electrical components mounted on automobiles, the number of connectors for connecting electrical components to each other increases, and this connector is generally mated. Therefore, it is difficult or impossible to fit the male connector and the female connector by pushing the male connector and the female connector with each other in the fitting direction.

For this reason, a female connector and a male connector are provided with a bolt on one side and a nut on the other side, and the bolt and the nut are screwed together to use a bolt-fastened type connector which fits the two connectors. Have been.
However, in this bolted connector, there is a problem in that if the bolt is tightened excessively, the connector housing may be broken. In order to solve this problem, a bolt-fastened connector provided with a break constriction in the bolt has been devised (Japanese Utility Model Laid-Open No. 60-875). This conventional bolted connector will be described with reference to the drawings.

FIG. 7 is a sectional view of a main part showing a female connector and a bolt of a conventional bolted connector. Housing 1 of female connector 10 of this bolted connector
2 is provided with a tightening bolt 14 at the center thereof.
The tightening bolt 14 is screwed into a nut provided on a male connector (not shown), whereby the male connector and the female connector are fitted. Further, the bolt 14 is formed with a fracture neck 14a. If the bolt is tightened with an excessive torque, the fracture neck 14a is destroyed first, thereby preventing the housing from being destroyed. .

[0005]

Here, a case where an excessive torque acts on the above-mentioned conventional bolted connector and the bolt 14 breaks at the break neck 14a will be described. Since the bolt 14 is fixed to the housing 12 by the washer 16 and the bolt stopper 18, when the bolt 14 is broken at the break neck portion 14, the bolt 14 is not effectively suppressed, and the bolt head 14 b side can be easily removed from the housing 12. Come off.

[0006] On the other hand, there is a problem that the operation of extracting the remaining bolts screwed into the male connector is performed using a special tool, and is not easy. The present invention
In view of the above circumstances, when fitting the male connector and the female connector using bolts and nuts, the connector housing is prevented from being broken, and excessive torque acts on the bolt to break the bolt. In this case, an object of the present invention is to provide a bolt-fastened connector from which the bolt can be easily removed.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a bolt-type connector according to the present invention is provided.
In a bolted connector having a bolt on one connector of the pair of connectors and a nut on the other connector screwed to the bolt, the bolt is
Inside of different diameters provided coaxially next to each other
Side and outer heads, and a break portion formed outside the inner head and breaking when a predetermined load or more is applied , the outer head is formed separately from the inner head. and it has a this <br/> those characterized.

[0008] The diameter of the inner-side head portion is larger than the diameter of the outer side the head portion is preferred. Note that the predetermined load is set to be equal to or less than the breaking strength of the connector housing, thereby preventing the housing from being broken.

[0009]

[Action] When fitting this bolt-tight connector,
When a load equal to or more than a predetermined value is applied to the bolt, the break portion breaks. This bolt has two different diameters .
Adjacent side and the outer head together is provided with a coaxial, moreover, breaking unit, which is formed from the inner head part on the outside, if the breaking portion is broken, only the outer side the head portion Remove from bolt. That is, since the inner-side head portion remains connected without departing from the bolt, by rotating the inner side head portion, can be easily removed the bolt from the connector. Also, the outer head is separate from the inner head
Because it is composed of the body, it has an inner head and an outer head
Bolts are easy to manufacture and the manufacturing cost is low.
You.

If the diameter of the inner head is larger than the diameter of the outer head, the bolt can be removed from the connector with a smaller torque before breaking.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a bolt used for a bolt-type connector according to a first embodiment of the present invention, and FIG. 2 is a front view of the bolt shown in FIG. This bolt is applied to all conventionally known bolted connectors, and is used, for example, in a female connector shown in FIG.

[0012] the upper end portion of the bolt 20 is threaded portion 20a is formed by the outer head 22 is screwed into the screw portion 20a, disposed adjacent the outer head 22 and the inner head 24 Is done. The outer head 22 has a flange 22.
a is provided. The outer diameter of the screw portion 20a is the bolt shaft 2
6 and the taper 26a is formed, so that the flange 22a and the inner head 24 do not come into contact with each other. A plurality of constricted portions 28 (corresponding to a screw bottom) are formed outside the boundary between the screw portion 20a and the bolt shaft 26, and when a load equal to or more than a predetermined load is applied, the constricted portions 28 are formed. Are to be broken. This predetermined load is equal to or less than the breaking strength of the connector housing, thereby preventing the housing from being broken. In this embodiment, the size of the outer head 22 is M6,
The size of the inner head 24 is M8.

A screw portion 20b is formed at a lower portion of the bolt 20, and a nut provided on a male connector (not shown) is screwed into the screw portion 20b. A groove 20c for receiving a bolt stopper (not shown) is formed in the center of the bolt shaft 26. These grooves are provided at two places on the bolt shaft 26, one of which engages with a bolt holding arm (not shown) of a bolt holding housing 70 (FIG. 6), and the other of which is a fixing bracket (not shown) attached to a male connector. (Not shown).

Next, a method of manufacturing the head of the bolt 20 will be described. The screw portion 20a can be formed by rolling. This rolling process is performed by using a material (bolt shaft 26 in this embodiment) between a flat plate or a roll having a groove.
And pressurizing it with a mold or roll to form screws, gears, etc. by plastic deformation, and the screw portion can be manufactured at low cost. The outer head 22 separate from the inner head 24 can be manufactured by a known method similar to the manufacture of a nut. this
The outer head 22 formed by a known method is connected to the threaded portion 20a.
Screw 20 to complete the bolt 20.
Easy to manufacture bolt 20 with 24 and outer head 22
Therefore, the manufacturing cost is low. That is, the outer head
22 is formed integrally with the inner head 24 and one bolt 20
When manufacturing by cutting from a bar of
Construction is more difficult than making the outer head 22 separate. Further, as shown in FIG. 3, the outer head 22 may be fixed to the bolt shaft 26 by crushing the top 20d of the screw portion 20a. In this case, even if the screw portion 20a is not formed,
The outer head 22 can be fixed to the bolt shaft 26, but at least one constriction 28 is formed outside the inner head 24. There are various methods for fixing the outer head 22 to the bolt shaft 26, such as welding, press fitting, and bonding. Right
The outer head 22 is attached to the bolt shaft 26 without forming the thread portion 20a.
In the case of various methods such as welding, press fitting, bonding, etc.
Nevertheless, the outer head 22 is attached to the bolt shaft 26 by these methods.
The bolt 20 is completed if it is fixed.
The structure is simple and the manufacturing cost is low.

Next, a case where the bolt 20 is used for fitting a connector will be described. The two connectors are fitted by providing the bolts 20 in, for example, a housing of a female connector shown in FIG. 7 and providing a nut to be screwed to the screw portion 20b in a housing of a male connector (not shown). In this fitting, for example, when the screw portion 20b and the nut are not properly screwed, the operator may apply a large torque to the head 22. Even in such a case, the predetermined load that the constricted portion 28 can bear is equal to or less than the breaking strength of the connector housing. Therefore, before the housing is broken, the constriction 28 starts to break and the screw portion 20b Breaks. For this reason, breakage of the housing can be prevented. Further, the outer head 22 is disengaged from the bolt shaft 26 due to the breakage of the constricted portion 28, but the inner head 24 remains. By rotating the inner head 24 with a wrench or the like, The bolt 20 can be removed from the housing. Moreover, as described above, the size of the outer head 22 is M
6. Since the size of the inner head 24 is M8, it can be performed more easily than at the time of fitting. Therefore, even if the screw portion 20b and the nut are screwed inappropriately, the bolt 20 can be easily removed.

In the above example, the case where the screw portion 20b and the nut are not properly screwed is described. However, after the two are properly screwed and the fitting of the connector is completed, the outer head 22 is further rotated. The same applies to the case where the bolt 20 and the nut are forcibly screwed together. Next, a modified example of the end shape of the bolt shaft 26 (see FIG. 1) into which the outer head 22 (see FIG. 1) is inserted will be described with reference to FIGS.

FIG. 4 shows an example in which the end portion 40 has a hexagonal shape. The end 40, the outer-side head section (not shown) is pressed. In addition, the constricted portion 42 which is broken by a load of a predetermined value or more.
Are also formed in a hexagon. FIG. 5 shows an example in which the end portion 50 has a rectangular shape. The end 50, the outer-side head section (not shown) is pressed. In addition, the constricted portion 52 that breaks under a predetermined load or more is also formed in a quadrangular shape.

FIGS. 4 and 5 show square and hexagonal ends, but the present invention is not limited to this, and other polygons may be used for the shape of the end into which the head is pressed. Including. Next, a second embodiment of the present invention will be described. FIG. 6 is a partial cross-sectional view showing a main part of the bolt-type connector according to the second embodiment, in which the vicinity of the head of the bolt 60 is formed by cutting.

In the first embodiment, the outer head 22 is screwed (see FIG. 1), but in this embodiment, the head 62, the flange 62a, and the head 6 are cut from one bar by cutting.
4. A constricted portion 68 is formed. This bolt 60
The heads 62 and 64 are held by a bolt holding housing 70 so as to fit the female connector housing 80 and a male connector housing (not shown). Bolt 6 when two connector housings are fitted
Since the operation of 0 is the same as that of the first embodiment, the description is omitted.

[0020]

As described above, in the bolt-fastened connector of the present invention, the inner and outer heads are provided coaxially adjacent to the bolts for fitting a pair of connectors, and moreover, a predetermined or more. Since the broken portion is formed to be broken when the load is applied to the bolt, the breakage of the housing can be prevented, and the bolt can be easily removed even if the broken portion is broken. Also, outside is head inside
Because it is composed separately from the temporal region,
Easy to manufacture bolts with outer head and low manufacturing cost
It can be an expensive bolted connector.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bolt used in a bolt-fastened connector according to a first embodiment of the present invention.

FIG. 2 is a front view of the bolt shown in FIG.

FIG. 3 is a cross-sectional view showing an example in which the head is fixed to a bolt shaft by crushing the top of a screw portion.

FIG. 4 is a perspective view showing a modification of the end shape of the bolt shaft into which the head is inserted.

FIG. 5 is a perspective view showing a modification of the end shape of the bolt shaft into which the head is inserted.

FIG. 6 is a partial cross-sectional view showing a main part of a bolt-fastened connector according to a second embodiment of the present invention.

FIG. 7 is a sectional view of a main part showing a conventional bolted connector.

[Explanation of symbols]

20, 60 bolt 22, 62 outer head 24, 64 inner head 28, 68 constriction

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 13/62-13/639 F16B 31/02

Claims (1)

(57) [Scope of request for utility model registration] 1. A bolted connector having a bolt on one connector of a pair of connectors to be fitted with each other and a nut on the other connector to be screwed with the bolt. provided coaxially adjacent, inner different diameters from each other
Side and outer heads, and a break portion formed outside of the inner head and breaking when a predetermined load or more is applied , wherein the outer head is separate from the inner head. bolted connector, characterized in that it is configured in.