[0001] The present invention relates to an electrical connector adapted to simultaneously
and guidedly connect a plurality of electrical lines. It is also an object of the
present patent a method to safely and simultaneously connect a plurality of energized
electrical lines.
[0002] The electrical connector according to the present invention is typically used in
the industrial field, but this type of connector is increasingly also used in other
sectors.
[0003] As known, there are in fact several sectors in which a plurality of electrical lines
may require quick and safe simultaneous connection, and therefore several technical
solutions are known in the market which achieve this object.
[0004] A sector in which multiple electrical connections are used is e.g. that of ground
moving machines and in this as in other sectors, in addition to quickly connecting
a plurality of electrical lines, the need is also strongly felt to be able to arrange
connection systems able to resist dirt such as dust or grease and moisture, caused
e.g. by the presence of mud or water in the area of use or due to atmospheric events.
[0005] In order to protect the electrical connection from ambient conditions, from the water
or moisture and from dirt in general, connectors are known in the market which provide
for the use of a cap closing the connection, e.g. the female connection which is generally
the one connected to the machine, while the male connection is the one generally connected
to the utility.
[0006] However this known solution has the drawback that the operator should intervene manually
to remove this covering to make the connection, and thus it is not optimal as it does
not make the connection itself completely automatic.
[0007] Moreover, the solutions of known type do not guarantee the desired safety levels
as the elements - in particular the female element in general which is connected to
the machine - are energized. The fact that the female element is energized constitutes
a potential danger in the case in which the seal provided by the cap is not entirely
effective. In fact, in this case water or moisture may penetrate from the closure
and come into contact with the contacts on the female connector and close the contacts
themselves by short circuiting, with consequent damage to the system.
[0008] Again, the multiple connection devices known from the state of the art are not easy
to clean as they get dirty due to the effect of the poor ambient conditions in which
they are used.
[0009] It is therefore the primary task of the present invention to provide an electrical
connector adapted to simultaneously connect a plurality of electrical lines which
allows overcoming the drawbacks afflicting the solutions of known type.
[0010] Within the scope of this task, the particular object of the present invention is
to provide an electrical connector adapted to connect a plurality of electrical lines
which is also able to effectively resist when used in conditions of moisture or of
water and dirt when the female part and the male part are connected to each other
in the operating phase, and also the ability for the female part alone disconnected
from the male part, to resist in adverse ambient conditions.
[0011] Again, it is the object of the present invention to provide an electrical connector
having several lines in which the female part is exempt from the risk of short circuiting
even when it is energized and is exposed to the action of adverse ambient conditions.
[0012] This task and these and other objects which shall become more apparent hereinafter
are achieved by an electrical connector according to the claims in the accompanying
claim 1.
[0013] The connector to simultaneously connect a plurality of electrical lines according
to the present invention is of the type comprising a female part and a male part,
a plurality of first electrical contacts being provided on each of said parts, one
for each line, adapted to be connected electrically to make the male-female connection,
and is characterized in that at least one of said parts comprises at least one element,
moveable according to the longitudinal direction of said connector, supporting said
plurality of first electrical contacts of said part and also supporting a plurality
of second electrical contacts connected electrically to said first electrical contacts,
said moveable element being moveable between a first resting position in which the
male and female parts are disconnected, at least a second intermediate position in
which said first electrical contacts of the male part and of the female part are connected
to each other while said second electrical contacts of said moveable element do not
make the electrical connection with the electrical lines, and a third final connected
position in which said first electrical contacts of the male part and of the female
part are connected to each other and said second electrical contacts of said moveable
element make the electrical connection with the electrical lines on the part comprising
the moveable element.
[0014] The electrical connector according to the present invention is also characterized
in that said moveable element is comprised in the female part.
[0015] Again, the electrical connector according to the present invention is characterized
in that it comprises a plurality of seals adapted to effectively insulate the inside
of the connector against liquids, moisture, dust and dirt in general.
[0016] Further features and advantages of the present invention will become more apparent
from the following detailed description, provided by way of non-limiting example and
illustrated in the accompanying drawings, in which:
figure 1 shows, in a sectional view according to a longitudinal plane, the female
part and the male part of the connector according to the present invention, in uncoupled
phase;
figure 2 shows the same view in figure 1 in which the male part begins being inserted
in the female part;
figure 3 shows the same view in figure 1 in which the insertion of the male part in
the female part is in an intermediate phase;
figure 4 shows the same view in figure 1 in which the male part is connected to the
female part;
figures 5 and 6 show a disconnection phase, and in figure 6, the two male and female
elements separated again at the end of the disconnection phase, respectively.
[0017] According to a preferred embodiment of the present invention illustrated in the cited
figures by way of non-limiting example, the electrical connector according
to the present invention consists of a female part
1 and of a male part
2. The female part
1 comprises a main body
3 in which a group of joint components is contained comprising an insulating body
4 inside of which a plurality of third female contacts
5 and third male contacts
6 are placed, connected to each other and made of conductor material.
[0018] The main body
3 is in turn connected to a cable gland
7, a seal
8 being advantageously inter-placed between the two elements which allows hermetically
sealing the body
3 against liquids and/or dirt in general. The cable gland
7, while firmly holding it, receives an electrical cable (indicated with
9) which brings the electrical lines
9a,
9b and
9c and which is connected to said third male contacts
6. When the cable
9 is subjected to electric voltage, it is propagated to the third male
6 and female
5 contacts.
[0019] A sealing ring
10 to prevent the entry of fluids and dirt in general is also conveniently provided
between the cable
9 and the cable gland
7.
[0020] The female part
1 also comprises a containment element
12, preferably plate conformed, to which said main body
3 with all the elements and the contacts therein contained is fastened by means of
connection means such as e.g. the screws
11. For this purpose, the main body
3 will have a collar
3a adapted to converge against a surface of said plate and adapted to allow the insertion
of said fastening means. The plate
12 is provided with a housing of convenient dimensions in which the main body
3 is inserted until the collar
3a converges against the external surface of the plate itself. Therefore, in the assembled
configuration shown in the accompanying figures, the main body
3 is partially inserted in said plate
12. In this case too, at least one seal
13, whose purpose is to hermetically seal the inside of the female part of the connector
against liquids and/or dirt in general, is inserted between the main body
3 and the plate
12.
[0021] The female part
1 also comprises a first slider
31, inserted in said plate and slidingly associated with the portion of said main body
3 inserted in said plate. Said first slider
31 is associated externally with said main body
3 and supports a plurality of pins or first male contacts
29 protruding from said slider
31 towards the front portion of the female part 1, and a plurality of second male contacts
30, connected to said pins
29, and turned towards the inside of said connector, towards the main body
3, and positioned so that said second male contacts
30 may co-penetrate the third female contacts
5 of said female part
1 when the first slider
31 moves longitudinally with respect to the main body
3 in the direction away from the front portion of the female part.
[0022] Advantageously said first slider
31 has a mainly longitudinal development and is hollow, the inner cavity being indicated
with the reference number
31a, and is coaxial to said main body
3 so that said external slider is guided in its longitudinal run and in its positioning
by the inner surface of said plate and by the external surface of the portion of main
body
3 inserted in said plate, so that said slider
31 slides externally with respect to said main body
3. An elastic element, preferably a first helicoid spring
33 adapted to resist the co-penetration of said main body
3 in the inner cavity
31a and therefore the nearing of the two elements, main body and slider, is conveniently
provided between said first slider
31 and said main body
3.
[0023] A second elastic element, also consisting in this case in the example shown in the
figures of a second helicoid spring
34 then acts between said first slider
31 and a second external slider
24, having action opposite to the preceding, i.e. resisting the separation of the slider
31 from the main body
3. The two elastic means
33 and
34 are conveniently sized so as to bring and keep said first slider
31 in the position in figure 1, i.e. in the position in which said second male contacts
30 are not inserted in said third female contacts
5, when the female part
1 is not connected to a male part
2 and the moveable element consisting of said first slider
31 and of said second male contacts
30 and said pins or first male contacts
29 is in neutral position.
[0024] The moveable element (generically indicated with the reference number
40) of the female part
1 of the connector also comprises said second external slider
24 to close the coupling zone of the male part
2 located in the front part of said plate
12 opposite to the part from which the main body
3 protrudes, also similarly conformed to said first slider
31 and having a collar adapted to contact said second spring
34 when the connector is in the configuration in figure 1, and said first slider
31 when the connector is in the configuration in figure 3.
[0025] Said second external slider
24 is associated with an internal spacer
25 and with an anti-extrusion disc
26, a seal
27 being conveniently provided between said internal spacer and said anti-extrusion
disc, while a further seal
28 is advantageously provided at each of said third male contacts
29 in order to prevent liquids, dust and/or dirt in general from penetrating from the
front surface
37 of the female part
1. The seals
28 seal the pins or third male contacts
29 belonging to said moveable element
40. The seal
32 seals the external slider
24 in uncoupled conditions, said seal, together with the seal of the O-rings
28 on the pins, make the front part of the uncoupled female pin impermeable.
[0026] With particular reference to figure 1, when the female part
1 of the connection is uncoupled, the moveable element
40 is in the position in which the front surface
24a giving outwards onto said second external slider
24 is aligned with said front surface
37 of the female part, so as to form a continuous and flat surface therewith closed
to the entry of dirt, moisture or water.
[0027] Moving now on to the description of the male part
2 of the connector according to the present invention, it comprises a main body
14 which contains a plurality of joint components. The main body
14 internally comprises an insulating body
15 in which a variable number of first female contacts
16 and first male contacts
17 are provided, connected to each other and made of conductor material. The first female
contacts
16 give outwards onto the front surface
38 of said male part
2, while the first male contacts
17 give inwards onto said insulating body
15 and are in turn connected to the electrical lines
20a,
20b and
20c brought by the cable
20. The portion of said main body
14 which terminates with said front surface
38 protrudes from a plate
23, provided with a convenient housing inside of which said main body
14 is inserted and to which it is connected by means of convenient connection means,
e.g. consisting of screws
22.
[0028] A cable gland
18 in which said electrical cable
20 is firmly inserted, which as said is connected to the male contacts
17, is inserted in the main body
14. A suitable number of male electrical contacts
17, each for every electrical line, will be provided depending on the electrical lines
brought by the cable
20.
[0029] As said, the male part
2 of the connection is generally connected to a utility, thus the cable
20 and the first contacts
16 and
17 are not subject to electric voltage but they receive voltage from the contacts on
the female part
1, when the two parts are connected.
[0030] A plurality of seals is also provided on the male part
2, in particular a seal
21 is provided between the cable gland
18 and the cable
20, to insulate the electrical contacts of the male part of the connector against liquids,
dust and dirt in general. Similarly, a seal
19 is conveniently provided at the joint of said cable gland
18 and said main body
14, as shown in the accompanying figures.
[0031] The operation of the connector object of the present invention will now hereinafter
be disclosed with reference to the coupling and uncoupling phases shown in the accompanying
figures, from 1 to 6.
[0032] Figure 2 shows the beginning of the coupling phase between the female part
1 and the male part
2 of the connector under examination. When the male
part 2 is neared to the female part, the two flat front surfaces,
37 for the female part and
38 for the male part, respectively, are juxtaposed one facing the other. The front surface
38 of the male part comes into contact with the front surface
37 of the female part
1, in particular the external front part
24a of said external slider
24 which is part of the moveable element
40. Thus the moveable element
40 moves back pushed by the main body
14 of the male part
2. In particular the external slider
24 moves back pushed by the front surface
38 of the male part, at this point the first male contacts
29 of the female part are inserted in the first female contacts
16 of the male part thus forming an electrical connection as shown in figure 3.
[0033] However, up to this point, said second male contacts
30 have not yet established an electrical contact with said third female contacts
5 of said female connection
1, therefore (we are in the configuration of figure 3) the electrical connection established
by means of the first male contacts
29 of the female part
1 with the first female contacts
16 of the male part
2 is not subject to voltage even when the lines
9a,
9b,
9c connected to the female part
1, by means of the cable
9, are energized.
[0034] Therefore, the moveable element
40 in the female part, with the double electrical contacts
29 and
30 which allow separating the coupling procedure of the male part with the female part
into two phases, allows making the electrical connection in a first phase between
the male part and the female part without the contacts of the female part being energized
even when the lines of the female part are energized.
[0035] Only in a second phase, seen in the successive figure 4, is the first slider
31 of the moveable element supporting the electrical contacts
29 and
30, pushed by the male part
2 until it comes into contact with the main body
3 thus making the electrical connection of said second male contacts
30 with said first female contacts
5. Only at this point the connection is subjected to electrical voltage of the lines,
as the first female contacts
5, through the first male contacts
6, are directly connected to the electrical lines brought by the cable
9.
[0036] Therefore the pins or third male contacts
29 are not energized in the intermediate connection phase due to the moveable element
40. (We are in the configuration of figures 1 to 3.) The connection is therefore safe
for the operator even when there is voltage in the electrical lines of the female
part
1 brought by the cable
9. The operator may safely come into contact with the pins
29 in complete safety, and the lack of voltage also makes the connection completely
safe should it occur under adverse ambient conditions or in the presence of water
or moisture. In order to ensure that liquids, moisture, dust and dirt in general still
do not penetrate inside the connector, a further seal
32 is provided between the containment plate
12 and the second external slider
24, so that it then exerts a seal on the main body
14 of the male part
2 when this is inserted in the female part by pushing the second external slider
24 and forcing it to move axially.
[0037] Figures 5 and 6 show an intermediate uncoupling phase of the connection according
to the present invention and the result of a final uncoupling phase, respectively,
showing how the moveable element
40 of the female part
1 returns to the neutral position in figure 1.
[0038] Hence, due to the elastic means
33 and
34, the moveable element
40 is moveable between a first resting position shown in figures 1 and 6 which corresponds
to the disconnected configuration of male part
2 and female part
1, and in which the second male contacts
30 and therefore the pins
29 are not connected to the first female contacts
5 of the main body
3 of the female part, and therefore are not energized, a second intermediate position
in which said female contacts
16 of the male part
2 are connected to said third male contacts or pins
29 of said female part
1 but the second male contacts
30 of the moveable element
40 are not connected to the said first female contacts
5 joint with said main body
3, and finally a third final connected position (seen in figure 4) in which said moveable
element
40 converges against said main body
3 and in which, therefore, said second male contacts
30 of said moveable element are connected, thus making the electrical connection, with
said first female contacts
5 of said main body
3, so that the voltage of the lines of the cable
9 connected to the female part
1 is transmitted to the lines of the cable
20 connected to the male part
2.
[0039] It has thus been shown how the electrical connector to simultaneously connect one
or more electrical lines according to the present invention achieves the object and
the purposes proposed.
[0040] In particular, it has been shown how the electrical connector according to the present
invention is extremely safe, as the contacts exposed externally and therefore subject
to the ambient conditions and exposed to the accidental contact by the operator are
not energized unless the connection has completely occurred and therefore in conditions
of total safety.
[0041] Moreover, it has been shown how the electrical connector according to the present
invention is completely insulated with respect to the external ambient, as liquids,
moisture, dust and/or dirt in general are totally prevented from penetrating the connector
and jeopardizing the correct operation of the electrical contacts. This result is
obtained without the need to use caps or closing covers of the contacts which would
require the manual intervention by the operator to be removed, thus jeopardizing the
simplicity and speed of the connection phase.
[0042] Several modifications may be made by the person skilled in the art without departing
from the scope of protection of the present invention.
[0043] Hence, the scope of protection of the claims should not be limited by the disclosures
or preferred embodiments shown in the description by way of example, but rather the
claims should comprise all features of patentable novelty inferable from the present
invention, including all features which would be treated as equivalent by the field
technician.
1. A connector to simultaneously connect a plurality of electrical lines (9a, 9b, 9c,
20a, 20b, 20c) of the type comprising a female part (1) and a male part (2), a plurality
of first electrical contacts (16, 29) being provided on each of said parts, one for
each line, adapted to be connected electrically to make the male-female connection,
characterized in that at least one of said parts (1, 2) comprises at least one element (40), moveable according
to the longitudinal direction of said connector, supporting said plurality of first
electrical contacts (29) of said part and also supporting a plurality of second electrical
contacts (30) connected electrically to said first electrical contacts (29), said
moveable element (40) being moveable between a first resting position in which the
male (2) and female (1) parts are disconnected, at least a second intermediate position
in which said first electrical contacts of the male part (16) and of the female part
(29) are connected to each other while said second electrical contacts (30) of said
moveable element (40) do not make the electrical connection with the electrical lines
(9a, 9b, 9c), and a third final connected position in which said first electrical
contacts of the male part (16) and of the female part (29) are connected to each other
and said second electrical contacts (30) of said moveable element (40) make the electrical
connection with the electrical lines (9a, 9b, 9c) of the part comprising the moveable
element.
2. A connector according to the preceding claim, characterized in that said moveable element (40) is comprised in the female part (1).
3. A connector according to the preceding claim, characterized in that said female part comprises a main body (3) at least partially inserted in a containment
element (12).
4. A connector according to the preceding claim, characterized in that said moveable element (40) comprises at least a first slider (31), associated externally
with said main body (1) and restrained from longitudinally moving along said portion
of main body (3) inserted in said containment element (12).
5. A connector according to the preceding claim, characterized in that said first slider (31) supports said first electrical contacts (29) and said second
electrical contacts (30) connected electrically to each other.
6. A connector according to the preceding claim, characterized in that said first electrical contacts (29) protrude externally from said slider (31) in
the direction opposite to said main body (3) towards the front surface (37) of said
containment element (12) of the female part (1), and said plurality of second male
contacts (30), in turn connected electrically to said first electrical contacts (29),
are turned inwards towards said main body (3).
7. A connector according to the preceding claim, characterized in that said moveable element (40) also comprises a second external slider (24), also moveable
in longitudinal direction with respect to said main body (3) and with respect to said
first slider (31), a helicoid spring (34) acting between said first slider (31) and
said second slider (24) by resisting the reciprocal nearing of the two elements, said
second slider (24) also being sliding with respect to said first electrical contacts
(29).
8. A connector according to the preceding claim, characterized in that said main body (3) also comprises an insulating body (4) inside of which is a plurality
of third female contacts (5) and third male contacts (6) connected electrically to
each other.
9. A connector according to the preceding claim, characterized in that said third male contacts (6) are in turn connected to said electrical lines (9a,
9b, 9c), each contact being connected to a line.
10. A connector according to any one of the preceding claims, characterized in that when said moveable element (40) is in the resting position, the external front surface
(24a) of said moveable element (40) achieves a flat and continuous surface with the
front surface (37) of the female part.
11. A method to connect a plurality of electrical lines (9a, 9b, 9c, 20a, 20b, 20c) by
means of a connector comprising a female part (1) and a male part (2), characterized in that it comprises a first phase in which the electrical connection is made of the contacts
(29) of the female part with the contacts (16) of the male part without said electrical
contacts being connected to the energized lines, and a second phase in which the two
parts (1, 2) already connected to each other are in turn connected electrically to
the energized lines.
12. A method according to the preceding claim characterized in that said energized lines are lines (9a, 9b, 9c) connected to said female part (1) of
said connector.