JPH06505120A - crimped electrical connection parts - Google Patents

Abstract

An electrical crimp connector (1) comprises a crimp barrel (3) located within an insulating sleeve (4), and a quantity of gel (5) located within each end region of the insulating sleeve at each end of the crimp barrel. Each quantity of gel contains an aperture (10) to allow wires (2) to be inserted into the crimp barrel. Once the connector has been crimped, the gel located within each end region of the insulating sleeve seals it against moisture ingress, forming a moisture-resistant electrical connection.

Description

[Detailed description of the invention] crimped electrical connection parts The present invention relates to crimped electrical connection components for connecting two or more electrical conductors.

A crimped electrical connection that somehow prevents corrosion of exposed metal inside the connecting parts. Various parts have been proposed in the past. However, in both cases, corrosion prevention of bare metal is not possible. Connection procedures that are insufficient or cumbersome to achieve the desired corrosion protection effect and requires special tools. For example, bare metal at a connection may get wet. If grease is used to prevent this, the grease can be easily removed or Or, if you try to crimp a connected part, the connected part may not be in the specified connection point. It jumps out. It is also an effective way to obtain a good seal in preventing corrosion. contains a hot-melt adhesive that seals by heating after crimping. There are some that use a heat recovery sleeve. However, this method simply crimps The problem is that it takes too much time to complete a consistent task compared to something that only needs to be done. There is. Moreover, in some cases it may even be undesirable to use heat.

Accordingly, the present invention provides an apparatus for butt splicing two or more electrical conductors. a crimping cannula with an open end; a crimping cannula surrounding the crimping cannula; an electrically insulating sleeve extending outwardly from both ends; A moisture-proof seal is provided at the end area facing outward from the end of the shrinking sleeve to provide a moisture-proof seal at the connection point. A metering gauge with an insertion hole that allows the insertion of an electrical conductor into the crimping sleeve. The present invention provides a device consisting of:

According to the invention, crimping is used to seal the connection of two or more electrical conductors. The advantage is that you have an easy-to-use device that allows you to make corrosion-resistant connections by simply Ru. When inserting the conductor into the crimping tube, do not allow it to be hindered by the presence of gel. Very rarely. Therefore, since there is no gel between the conductor and the crimping sleeve, the connection A connection portion with relatively low contact resistance can be constructed. In addition, the crimping sleeve has a gap. Since there are no cables, it is easier to insert and place the conductor, and the conductor is easily removed during the crimping process. The tendency of the crimping sleeve to fall off from the crimping sleeve can be suppressed.

In a preferred embodiment of the invention, the device is a ferrule (hollow cylinder or ring). on the outside of each end of the crimping sleeve and between the insulating sleeve and the gel. It is set in. The use of ferrules provides several advantages. for example , the ferrule protects the electrical conductor inserted into the device from stress caused by its movement. (stress relaxation). Separately or at the same time, for crimping There is a small amount of gel on the electrical conductor inserted into the cannula (some of it can be crimped to squeeze it out). The ferrule allows the butt joint formed inside this device to be exposed to outside air. It can also be shielded from Accordingly, the present invention provides a method for connecting two or more electrical conductors to A device for joining and splicing, comprising a crimping cannula with both ends open, and a crimping cannula surrounding the crimping cannula. and an electric wire surrounding the crimping sleeve and extending outward from both ends thereof. an insulating sleeve and an end region of the sleeve facing outwardly from the end of the crimping sleeve; A metered gel is applied to the end area of the crimping tube to provide a moisture-proof seal at the connection point and interposed between the insulating sleeve and the gel on each end to form the crimping sleeve. A gel that can be crimped to squeeze at least a portion of the gel against an electrical conductor inserted therethrough. or a ferrule that can be crimped to relieve stress on electrical conductors. Its purpose is also to provide a convenient location.

The electrically insulating sleeve of the device according to the invention may be made of, for example, polytetrafluoroethylene. ethylene, ethylenetetrafluoroethylene, polyvinylidene fluoride, etc. Preferably, the bridge is constructed from a polymeric material. However, nylon 6, nylon 11, It is more preferable to construct the sleeve with nylon such as iron 12, in which Nylon 12 is particularly desirable.

In some cases, each end of the insulating sleeve has its opening edge to the inside of the insulating sleeve. Insulating strips of electrical conductors should be removed before or during use of the equipment Allows insertion of the sleeve into the interior of the sleeve, but prevents gel from flowing out from inside the insulating sleeve. It may be desirable to devise ways to increase the

For example, in the case of certain electrical conductors such as copper wire, the internal shape of the crimping sleeve is It is desirable that the material be suitable for wedge attachment. For example, inside the crimping sleeve. Provide serrations, barbs, or gripping edges on the part to facilitate connection with the device. may be strengthened. However, in the case of other electrical conductors, such as multicore copper wire, As mentioned above, insert serrations, barbs, gripping edges, etc. inside the crimping cannula. Even if it is provided, the effect may not necessarily be obtained, so A strong connection can be obtained by simply using the device as a smooth surface (but after crimping).

Preferably, the crimping sleeve is constructed from an electrically conductive material, such as copper. tin plate When connecting conductors coated with gold, it is highly desirable to have tin on the inner circumference of the crimping sleeve. For this purpose, a copper crimping sleeve whose inner surface is tin-plated may be used; This can reduce the risk of galvanic corrosion.

The device according to the invention includes a metered amount of gel, which gel is applied to each end of the crimping cannula. located within the end of the insulating sleeve on the outside to prevent moisture from entering the The abutment splice is sealed to prevent intrusion. In the specification of this application The term "gel" as used herein refers to a liquid-extended polymer composition.

Such polymer compositions have a three-dimensional network of cross-linked molecular chains, and At least 300 parts by weight, preferably 500 parts by weight per 100 parts by weight of the remer composition Contains parts of bulking liquid. The gel used in the present invention has a cone penetration value (AST M (measured according to D412 regulations) is 100-400 10-1 mm 18 preferably 1 00-35010-' mm, ultimate elongation (measured according to ASTM 0217 regulations) ) is preferably 100% or more, and the elastic deformation rate against elongation is preferably small (both 100%, and the ultimate tensile strength (measured according to ASTM D412 regulations) is preferred. Preferably, it is smaller than 1 megapascal.

The polymer composition may be, for example, an elastomer or a relatively hard block and It consists of a block copolymer with relatively elastomeric blocks. Also good. Such copolymers include, for example, international patent application PCT/GB87. 100506, the styrene/ethylene/butylene/styrene Riblock copolymers, styrene/butadiene or styrene/isoprene di- Styrene/diene block copolymers such as block or triblock copolymers One example is merging. Traditionally, elastomer materials have been used as bulking liquids for gels. It may also be an oil used to increase the amount of . Take this oil as an example , for example, hydrocarbon oils such as paraffinic oils or naphthenic oils, and polybutene oils. Examples include synthetic oils such as oils and polybrene oils, and mixtures thereof. Like The preferred oil is a mixture of non-aromatic paraffin and naphthenic hydrocarbon oil. Yes. A preferred gel is a reactive silicone cured with a non-reactive extender silicone. It can also be obtained by The gel also contains dehumidifiers (e.g. Penzol salts) may contain known additives such as antioxidants, pigments, and fungicides. .

In the device according to the invention, the gel is inserted into the crimping sleeve with the electrical conductor to be connected. After the sleeve is crimped, it serves to prevent moisture from entering. Create pressure on the gel By using the gel, the effect of preventing moisture intrusion can be ensured. Why? When pressure is applied to the gel, it behaves like a liquid and penetrates into the gaps. This is because as it fills, it blends into the surrounding surface and seals it.

In a preferred embodiment of the invention, an insulating sleeve is provided on the outside of each end of the crimping sleeve. The ferrule provided between the gel is crimped around each conductor wire inserted. It is now possible to do so. This allows the ferrule to relieve stress on the conductor. The advantage is that it can be made to work. at the same time or Apart from this, crimping the ferrule on the conductor compresses the gel, so This can promote the sealing effect of the In a more preferred embodiment of the invention, each At least a portion of the gel is interposed between the corresponding ferrule and the crimping sleeve. Ru. Therefore, the crimping sleeve is crimped at a portion of the crimping sleeve and each ferrule.

Then, the part of the gel interposed between the ferrule and the crimping sleeve is usually compressed. (depending on the degree of crimping and the total amount of insulated conductor passing through each end of the Potash depending on the cross-sectional area. When the gel is compressed in this way, the inner circumferential surface of the insulating sleeve The outer circumferential surface of the insulated conductor is wetted with gel, which protects the butt joint from moisture intrusion. It becomes a seal. Also, the ferrule itself must be machined (at each end of the device). Along with the gel on the outside of the rule, foreign matter such as dust and dirt may enter the butt joint. It also works to prevent

To ensure a sealed connection, place the crimping sleeve and ferrule inside the device. It may be placed in place. For example, a crimping sleeve and a ferrule are attached to the inner circumferential surface of an insulating sleeve. It is also possible to glue them together and leave them in place. In particular, apply an adhesive layer on the inside of the insulation sleeve. Just leave it there. Adhesives that can be used include, for example, ethylene homopolymer and Ethylene copolymerization such as ethylene vinyl acetate and ethylene vinyl acetate The number of carbon atoms between adjacent carbonyl groups is Polyamide adhesives prepared with relatively large (e.g. >15) polyamides, etc. 4.018.733 and 4.181.775, among others. Preferred are polyamide adhesives based on dimeric diamines as disclosed in No.

In another aspect, the invention provides a double-ended crimping sleeve and a crimping sleeve surrounding the crimping sleeve. an electrically insulating sleeve extending between the ends of the cannula and an end region of the insulating sleeve; A moisture-proof seal is provided at the end area facing outward from the end of the crimping sleeve, and a moisture-proof seal is provided at the connection point. It has a through hole that allows the insertion of an electrical conductor into the crimping sleeve. butt joining of two or more electrical conductors using a device consisting of a metering gel and A method of forming a section is also provided. This method according to the invention comprises: (i) each conductor; Strip the insulation coating from each end to expose the conductor, and (ii) insert it into the crimping tube. Insert the bare end of the conductor into the device until part of the insulation sheath is surrounded by the insulation sleeve. (iii) crimping a crimping sleeve around the conductor.

Note that the device has a crimpable ferrule on the outside of each end of the crimping sleeve that is connected to the insulating sleeve. In addition to the method steps described above, (iv) ) Crimp each ferrule around the outer periphery of the insulation coating of each conductor inserted into the crimping sleeve. There are steps to follow.

Since the gel agent is deformable, the cross-sectional area of each gel insertion hole provided in the device is may be smaller than the total cross-sectional area of the insulated conductors inserted into the device. Therefore, it can be done. That way, you can simply insert the conductor into the device and connect the conductor and the inside of the device. This is convenient because it compresses the gel between it and the surrounding surface, and at that time, if it is crimped, The compressed gel is further compressed, which helps prevent moisture intrusion. be able to.

Hereinafter, the apparatus of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view showing a device according to the invention and a pair of insulated conductive wires.

FIG. 2 is a longitudinal cross-sectional view showing the butt joint between insulated conductors formed by the apparatus of FIG. 1. Ru.

In Figure 1, there is a butt joint between two (or more) electrically insulated cables 2. A device 1 for forming a joint includes a crimping cannula 3 and a crimping cannula 2 surrounding the crimping cannula 2. , an insulating sleeve 4 extending outward from both ends of the crimping sleeve (this sleeve The outer diameter of the crimping cannula is the diameter of the insulating sleeve surrounding the crimping cannula. diameter of the crimping sleeve) and the ends of the insulating sleeve outwardly of each end of the crimping sleeve. A gel 5 is inserted in the crimping sleeve, and an insulating sleeve 4 and a gel 5 are inserted outside each end of the crimping sleeve. The ferrule 6 interposed between the crimping sleeve 3 and the stress relaxation ferrule is connected. It consists of an adhesive layer 7 applied to the inner circumferential surface of the insulating sleeve 4 in order to attach and hold it in place. has been done. The inner peripheral surface of the crimping sleeve 3 connects the bare wire ends 2 of both insulated cables 2 with electricity. A serrated projection 8 is formed to be wedged on the bare wire end 2 of the insulated cable 2 for electrical connection. It is. Each gel has an insertion hole 10 that allows the cable to be inserted into the inside of the device. It is formed. The diameter of the insertion hole 10 in each gel is determined by Although chosen to be smaller than the diameter of the covered cable, gel 5 is deformable. For this reason, the cable can be easily inserted into the insertion hole 10.

Figure 2 shows the two cables shown in Figure 1 after they have been inserted into the device shown in Figure 1. By crimping the points indicated by the arrows, the butt splicing of the cables was completed. It indicates the condition. As shown, the gel 5 is attached to each ferrule 6 and the crimping cannula 3. is compressed in the section 11 between the Preventing. Each ferrule also cooperates with the outer portion 12 of each gel to form a connection. This helps prevent the intrusion of external foreign substances such as sand and dust.

Claims (16)

[Claims] 1. A device for butt-splicing two or more electrical conductors, the windings being open at both ends. a crimping cannula, a crimping cannula surrounding the crimping cannula, and extending outwardly from both ends of the crimping cannula; an extending electrically insulating sleeve and an end region of the sleeve, the end of the crimping sleeve; It is provided in the end area facing outward from the outside, and provides a moisture-proof seal at the connection point, It consists of a quantitative gel having an insertion hole that allows the insertion of an electrical conductor into the crimping sleeve. A device. 2. 2. The crimping sleeve of claim 1, wherein the crimping sleeve has a continuous A device consisting of a ferrule between the edge sleeve and the gel. 3. 2. The ferrule according to claim 2, wherein the ferrule is a conductive wire inserted through the ferrule. A device adapted to be crimped around. 4. A device for butt-splicing two or more electrical conductors, the windings being open at both ends. a crimping cannula, a crimping cannula surrounding the crimping cannula, and extending outwardly from both ends of the crimping cannula; an extending electrically insulating sleeve and an end region of the sleeve, the end of the crimping sleeve; A fixed amount gel is provided in the end area facing outward from the top and applies a moisture-proof seal to the connection point, each interposed between the insulating sleeve and the gel on the end of the crimping sleeve, Crimp to squeeze at least a portion of the gel against the electrical conductor inserted through the crimping cannula. with a ferrule that can be crimped or crimped to relieve stress on electrical conductors. A device made up of 5. The product according to any one of claims 2 to 4, wherein each of the games is at least a portion of the crimping sleeve is interposed between the corresponding ferrule and the crimping sleeve. equipment. 6. The crimp according to any one of claims 2 to 5, wherein the crimped A device in which a cannula and a ferrule are bonded to the inner peripheral surface of an insulating sleeve. 7. The insulating material according to any one of claims 1 to 6, Each end of the sleeve has an open edge recessed inside the insulating sleeve; Allows electrical conductors to pass through the insulating sleeve, but not inside the gel insulating sleeve. A device that prevents water from flowing out of the body. 8. The crimp according to any one of claims 1 to 7, wherein the crimped A device in which the inner surface of a cannula is shaped to wedge around an inserted electrical conductor. 9. The crimp according to any one of claims 1 to 8, wherein the crimped A device whose cannula is made of tin-plated copper. 10. The product according to any one of claims 1 to 9, wherein the winding A device in which the shrinking cannula comprises a liquid extendable polymer composition. 11. a crimping cannula having both ends; a crimping cannula surrounding the crimping cannula; an electrically insulating sleeve extending outwardly from each end of the tube and an end region of the insulating sleeve; This is provided in the end area facing outward from the end of the crimping sleeve, and a moisture-proof film is provided at the connection point. crimped sleeve, and has an insertion hole that allows the insertion of an electrical conductor into the crimping sleeve. The butt addition of two or more electrical conductors using a device consisting of a metering gel and A method of forming a contact portion, the method comprising: (i) Strip the insulation coating from the end of each conductor to expose the conductor, (ii) Crimp tube. and into the device until a portion of the insulation sheath is surrounded by the insulation sleeve. by inserting the bare end of the wire and (iii) crimping the crimping sleeve around the conductor. A method for forming an abutment joint. 12. 12. The method according to claim 11, wherein the diameter of the through hole in each gel is A method in which the insulation sheath inserted into it is chosen to be smaller than the diameter of the cable. . 13. 13. The method of claim 11 or claim 12, wherein the device is crimped. A crimping ferrule is interposed between the insulating sleeve and the gel on the outside of each end of the crimping sleeve. (iv) the outer circumference of the insulation coating of each conductor inserted through the crimping sleeve; method by crimping each ferrule. 14. An abutting splice of two or more electrical conductors, which includes: (i) a double-ended crimp; a crimping cannula, and a crimping cannula surrounding the crimping cannula and extending outward from both ends of the crimping cannula. an electrically insulating sleeve, and an end region of the insulating sleeve, the end region of the crimping sleeve being A moisture-proof seal is provided at the connection point, and the end area facing the outside is provided with a moisture-proof seal at the connection point. It consists of a metering gel that has an insertion hole that allows the insertion of an electrical conductor into the reduction cannula. A device that has (ii) Two or more wires with the insulation coating stripped off and exposed at each connection end. The upper conductor and (iii) each connecting end is inserted up to the crimping cannula of the device, and the crimping cannula is By crimping the gel, a part of the insulation coating is surrounded by gel. A butt joint consisting of the upper conductor. 15. Claim 14: Between the ferrule and the crimping sleeve. on each end of the crimping cannula so that at least a portion of the gel is positioned. A ferrule is interposed between the edge sleeve and the gel, and the ferrule is inserted. A butt joint formed by crimping around the conductor. 16. Forming an abutment splice between a pair of electrical conductors will be explained with reference to the accompanying drawings. , and the apparatus shown in FIG.