FR3083376A1 - ELECTRICAL CONNECTION TERMINAL WITH TIGHTENING ASSEMBLY - Google Patents

Abstract

This terminal (301) for the electrical connection of one end of the electrical conductor (303) comprises an electrically insulating housing (5), comprising a clamping opening (15) coaxial with a clamping axis (Z15) of the terminal (301), an electrical terminal, enclosed in the housing (5) and comprising a threaded opening (29) coaxial with the clamping axis (Z15), the clamping opening (15) opening onto the threaded opening (29); and a clamping assembly (9), comprising a screw (13), which is coaxial with the clamping axis (Z15) being screwed into the threaded opening (29) and which comprises a screw head (39) having a first anti-rotation shape around the clamping axis (Z15); and a cap (311), which includes an electrically insulating body (341). The body (341) is mounted on the clamping opening (15), by pivoting relative to the housing (5) around the clamping axis (Z15), and being in abutment against the housing (5) in a direction of unscrewing (B15) of the screw (13), parallel to the tightening axis (Z15).

Description

Electrical connection terminal with clamping assembly

The present invention relates to an electrical connection terminal, as well as an electrical device comprising one or more electrical connection terminals.

In the field of electrical engineering, electrical devices, such as cable connection sleeves, terminal blocks, star blocks, connectors or fuse holders, are fitted with connection terminals, each receiving one end of cable, or any other end of the electrical conductor. The invention relates to this area, although it can be applied to neighboring areas. In particular, the invention relates to electrical devices for the distribution of low voltage electricity, that is to say between about 50 and 1000 volts, for example for supplying a building with electricity.

Generally, each electrical connection terminal has an electrical terminal and is designed to accommodate the end of the electrical conductor. The conductor end received is electrically connected with the terminal, by contact of the conductor end with this terminal. Generally, to fix the end of the electrical conductor to the terminal while ensuring electrical contact between the conductor end and the terminal, a clamping screw is used carrying a plastic cap, defining a breakable head, or fusible head. The operator is electrically isolated from the metal screw by the plastic cap, the screw can be tightened through the cap. The head and body of the hat are linked by a breakable member which is designed to break when a predetermined tightening torque is applied to the head. This limits the tightening of the screw to a maximum tightening torque, generally chosen to avoid excessive tightening of the conductor end in the terminal, which could lead to its deterioration. Second, the screw thus tightened is found free of head, which generally aims to prevent its loosening using a conventional loosening tool such as a key or a screwdriver, for safety reasons.

An example of a plastic cap screw, and its method of fixing by tight mounting, is described in AU 2008 249 174 A1. In other known clamping assemblies, the cap and the screw are assembled by gluing or crimping the head onto the body.

Whatever the method of assembling the cap on the screw, there is a risk that the insulating cap will detach from the metal screw during tightening, or during the life of the electrical device, often exposed to severe environmental conditions. , because used outdoors. This can generate an electrical risk if the metal screw is exposed by detaching the insulating cap.

Furthermore, the assembly of the cap on the screw represents certain manufacturing constraints. For example, glue is expensive and does not always ensure a lasting fixing of the cap on the screw. Overmolding requires the implementation of a specific tool to be produced, which represents a significant part of the cost price of the clamping assembly. In addition, overmolding does not necessarily constitute a long-term lasting fixation, under the aforementioned environmental conditions. Bonding as overmolding can also prove, in certain cases, of a lower resistance to the forces involved during the tightening of the screw, which causes a disassembly of the breakable head of the screw, before rupture of the head scored. There is thus a risk of insufficient tightening of the screw, which can be critical especially for electrical devices.

The invention therefore aims to remedy the drawbacks of the prior art by proposing a new electrical connection terminal with a clamping assembly, in which the holding of the cap on the screw is improved.

The subject of the invention is an electrical connection terminal of an end of an electrical conductor, the terminal comprising:

- an electrically insulating housing, comprising a clamping opening coaxial with a clamping axis of the terminal;

- an electrical terminal, enclosed in the housing and comprising a threaded opening coaxial with the clamping axis, the clamping opening opening onto the threaded opening; and

- a clamping assembly, comprising:

o a screw, which is coaxial with the clamping axis while being screwed into the threaded opening and which comprises a screw head having a first anti-rotation shape around the clamping axis; and o a hat, which comprises an electrically insulating body; characterized in that the body:

- Is mounted on the clamping opening, by pivoting relative to the housing around the clamping axis, and by abutting against the housing in a direction of unscrewing the screw, parallel to the clamping axis; and

- forms a sliding cavity, opening into the housing and having a second anti-rotation shape around the clamping axis, so that the sliding cavity cooperates mechanically with the screw head for:

o allow the screw to slide relative to the body along the tightening axis, thereby defining a sliding travel of the screw relative to the body along which the screw head is at least partially in the sliding cavity , and o for at least a first range of the sliding stroke, link in rotation the body and the screw around the clamping axis.

Thanks to the invention, it is not necessary to fix the screw to the cap, which avoids a significant manufacturing constraint of the prior art, while still obtaining, in the invention, protection of the head by the hat which is insulating. In the invention, rather than being fixed to the bonnet, the screw slides axially along the sliding cavity of the bonnet, while being driven in rotation by the bonnet, for at least the first range of the sliding stroke of the screw, which allows to screw, and optionally, unscrew. This rotary drive is obtained by mutual mechanical cooperation of the anti-rotation shapes of the screw and of the sliding cavity. While the cap imparts a rotational movement to the screw relative to the housing, around the tightening axis, the screw is axially displaced thanks to the threaded opening, which is in screw connection with the screw, it is that is to say, a connection links the rotation of the screw to its axial displacement. Instead of being axially attached to the screw, the cap is attached to the terminal housing, being in axial abutment at least in a direction of withdrawal of the cap, namely the direction of unscrewing. This attachment of the cap to the housing is easier to achieve than would be a fixing of the cap to the screw and is more durable and resistant.

Other optional and advantageous features of the invention are defined in the following:

- The hat includes a breakable head attached to the body outside the case, the breakable head being coaxial with the clamping axis.

- The body and the screw head are configured so that, for a second range of the sliding stroke following the first range in a direction of screwing of the screw, parallel to the tightening axis, the screw is released in rotation by relation to the body around the tightening axis.

- The body has a radial thickness, measured radially with respect to the clamping axis, along the sliding cavity, between the sliding cavity and an external radial wall of the body, the radial thickness decreasing in the direction of screwing, so that the mechanical cooperation of the screw head with the sliding cavity takes place with an increasing radial deformability of the body, when sliding the screw head in the sliding cavity in the direction of screwing.

- The sliding cavity widens in the direction of screwing, so that the mechanical cooperation of the screw head with the sliding cavity takes place with increasing radial clearance, during the sliding of the screw head in the sliding cavity in the screwing direction.

- The anti-rotation form of at least one element, among the sliding cavity and the screw head, is a form of anti-rotation truncated cone, the largest base of which is directed in the screwing direction.

- The second anti-rotation form of the sliding cavity is a form of anti-rotation cylinder, coaxial with the clamping axis; the first anti-rotation form of the screw head is a form of anti-rotation cylinder, coaxial with the clamping axis and complementary with the second form; For the entire sliding travel of the screw in the body, the second anti-rotation form covers the first anti-rotation form, parallel to the tightening axis, over a length of grip which on the first range is greater than a threshold value , so that the body and the screw are linked in rotation around the tightening axis by mechanical cooperation of the sliding cavity with the screw head, and on the second range, is less than the threshold value, so that the screw is released in rotation relative to the body around the tightening axis, the sliding cavity flowing around the screw head during rotation.

- Along the tightening axis, the sliding cavity ends with a terminal edge which is located at an axial distance from the threaded opening, which is greater than at least the axial dimension of the screw head, measured in parallel to the tightening axis, so that the screw can reach a disengaged position, along the tightening axis, outside the sliding stroke, in which the screw head is entirely outside the sliding cavity, between the terminal edge and the threaded opening.

- The electrical terminal comprises, along the clamping axis, a contact stop located at a distance from the threaded opening, the threaded opening being located between the clamping opening and the contact stop, the electrical terminal being configured to receive the end of the electrical conductor between a tightening end of the screw, opposite the screw head, and the contact stop, the end of the electrical conductor being capable of being pressed against the contact stop by the tightening end, by screwing the screw.

The invention also relates to an electrical device, comprising one or more electrical connection terminals as described above.

Other features and advantages of the invention will become apparent in the description below. In the appended drawings, given by way of nonlimiting examples:

Figure 1 is a partial section of an electrical device comprising a connection terminal according to a first embodiment of the invention;

Figure 2 is a partial section of an electrical device comprising a connection terminal according to a second embodiment of the invention;

Figure 3 is a partial section of an electrical device comprising a connection terminal according to a third embodiment of the invention;

Figure 4 is a partial section of an electrical device comprising a connection terminal according to a fourth embodiment of the invention; and FIG. 5 is a partial section of an electrical device comprising a connection terminal according to a fifth embodiment of the invention.

Figure 1 shows part of an electrical device for electrically connecting electrical networks to each other.

Alternatively, the electrical device is a cable connection sleeve, a terminal block, a starter block, a termination, for example a terminal, or a fuse holder connector. More generally, “electrical device” includes any device carrying at least one electrical terminal to connect one or more ends of the electrical conductor.

FIG. 1 shows, in full, an electrical connection terminal 1 belonging to the electrical device, the terminal 1 sometimes being called “connection terminal”. The terminal 1 is designed to receive a conductor end 3, here a cable end, which in FIG. 1 is shown separately from the terminal 1.

For example, the end 3 has a section of between 6 and 300 mm ² (square millimeters), and comprises either a single electrically conductive metallic strand, that is to say forms a solid metal, or several metallic strands electrically conductive, for example between 7 and 19 strands. Preferably, the end 3 also includes an insulating sheath, surrounding strands. Depending on the type of connection terminal, with insulation perforation or not, the end 3 may be stripped of its sheath, the terminal ensuring perforation of the sheath to reach the conductive strands, or on the contrary stripped of its sheath , if the terminal is not equipped with a sheath perforation system.

For example, the electrical device comprises a second electrical connection terminal for receiving another end of the electrical conductor, or even more terminals, not shown in FIG. 1, preferably for connecting these ends electrically to each other.

Terminal 1 mainly includes:

a housing 5, which is made, preferably entirely, from one or more electrically insulating materials with respect to the electrical energies involved in the terminal 1, in particular one or more polymeric plastic materials, or a composite material with a matrix of polymeric plastic material and fibrous reinforcement;

- an electrical terminal 7, which is made, preferably entirely, in one or more materials electrically conductive of the electrical energy involved in the terminal 1, preferably a metallic material, for example based on copper, brass, d aluminum or steel; and

a clamping assembly 9, comprising electrically insulating parts, in particular at least part of the cap 11, and electrically conductive parts, in particular a screw 13.

The electrical terminal 7 being a conductive part, it is enclosed in the insulating housing 5, to be protected. Preferably, the housing 5, and the elements which close off its various openings defined below, are designed to form an envelope substantially impermeable to water and dust around the terminal 7, in particular insofar as the electrical device has advantageously intended to be placed outdoors, to be buried or to be placed on overhead electrical installations.

The electrical terminal 7 is fixed to the housing 5, advantageously so as to be fixed relative to the housing.

The terminal 1 geometrically defines a clamping axis Z15 and an insertion axis X17, which are fixed relative to the housing 5. The axis Z15 is advantageously transverse with respect to the axis X17, for example perpendicular, l axis Z15 intersecting with axis X17. Unless stated otherwise, expressions such as "axial" and "radial" are made with reference to the Z15 axis.

The housing 5 comprises an opening 15, called the "clamping opening", coaxial with the axis Z15, and an opening 17, called the "insertion opening", coaxial with the axis X17.

We also define a direction F15, called "screwing direction", and a direction B15, called "unscrewing direction", and opposite to direction F15. The directions F15 and B15 are parallel to the axis Z15. The direction F15 is oriented towards the inside of the housing 5, that is to say is directed from the opening 15 towards the terminal 7.

In the present example, the opening 17 is formed by a tubular part of the housing 5, coaxial with the axis X17 and capped with a cap 27.

To be received by the terminal 1, the end 3 is introduced into the housing 5 along the axis X17, until it reaches at least the intersection of the axes Z15 and X17. The insertion of the end 3 is carried out through the opening 17, here through the cap 27. The cap serves as a gasket, interposed between the end 3 and the opening 17. Any other gasket The seal can be used in place of the cap 27, with a different method of fixing to the opening 17.

The terminal 7 advantageously comprises a tubular part 23, for example of rectangular section, surrounding the axis X17, to receive, by surrounding it, the cable end 3. Along the axis X17, the tubular part 23 s 'extends up to axis Z15. Inside the housing 5, the opening 17 opens at one end, that is to say an inlet, of the tubular part 23 of the terminal 7. The tubular part 23 comprises, in the direction F15, a stop 25 of electrical contact with the cable end 3, turned in the direction B15. The stop 25 is advantageously crossed by the axis Z15. The end 3 is brought into contact radially with respect to the axis X17, in the direction F15, against the stop 25, to ensure the electrical connection by contact between the terminal 7 and the end 3.

In the present example, the stop 25 comprises insulating sheath perforation teeth intended to perforate the sheath of the end 3 received, in order to come into contact with the electrically conductive parts of the end 3, located at the heart. Alternatively, the stop 25 is toothless, and for example simply has a flat or curved shape turned in the direction B15, to receive in support an end of electrical conductor without insulation, or stripped of its insulating sheath.

Diametrically opposite the stop 25, that is to say in the direction B15, the tubular part 23 of the terminal 7 is crossed by an opening 29 carrying an internal thread and being coaxial with the axis Z15. The opening 29 is therefore disposed at a distance from the stop 25 along the axis Z15, the end 3 being received between the opening 29 and the stop 25. Furthermore, the opening 29 is located along the axis Z15, between the clamping opening 15 and the stop 25.

The screw 13 is preferably made of metallic material, for example aluminum, brass, or steel. More generally, the screw 13 is made of electrically conductive material.

Preferably, it is provided that the screw 13 is not breakable under the action of a screwing torque. In other words, the screw 13 is not designed to break under the action of a particular tightening torque.

The screw 13 comprises a threaded rod 37, by means of which the screw 13 is screwed into the opening 29, so as to be in helical connection with the terminal along and around the axis Z15. The screw 13, in particular the rod 37, is therefore coaxial with the axis Z15. By this screwing connection, a rotation of the screwing of the screw 13 around the axis Z15 therefore advances the screw 13 relative to the terminal 7 in the screwing direction F15. Unscrewing rotation unscrews the screw 13 in the unscrewing direction B15.

The screw 13, in particular its threaded rod 37, ends with a tightening end 40 in the direction F15, which faces the stop 25. To fix the end 3 to the terminal 1, the end 3 is advantageously tightened between the end 40 and the stop 25, so that the end 3 is compressed or crushed radially between the screw 13 and the terminal 7, relative to the axis X17. The end 3 is thus brought into abutment against the stop 25 by screwing the screw 13.

In direction B15 with respect to its threaded rod 37, the screw 13 comprises a screw head 39, which is arranged in direction B15 with respect to the opening 29. The screw head 39 is therefore one end of the directed screw in the direction B15, opposite the end 40 directed in the direction F15. The head 39 is therefore turned towards the side of the opening 15, preferably being radially surrounded by the opening 15 for at least part of the travel of the screw 13 along the axis Z15.

In addition to the tubular part 23, the terminal 7 advantageously comprises a tab 31, directed parallel to the axis X17 opposite the opening 17, for electrically connecting the terminal 7 to subsequent conductive parts of the electrical device, not shown, comprising for example another connection terminal and / or a fuse holder.

The opening 15 is preferably formed by a tubular pipe 33, belonging to the housing 5, which is coaxial with the axis Z15. Here, the pipe 33 projects in the direction B15. In the housing 5, the opening 15 leads to the opening 29 of the terminal 7, the terminal 7 being arranged in the direction F15 relative to the opening 15.

The opening 15 is crossed by the clamping assembly 9, which closes it, advantageously by closing off the pipe 33.

In particular, it is the cap 11 which closes the opening 15. More specifically, the cap 11 comprises a body 41, of generally tubular shape with a circular base, which is coaxial with the axis Z15. The body 41 is preferably adjusted in the pipe 33, which serves as a pivot bearing for the body 41. The body 41 is thus in pivoting connection with the body 41 relative to the pipe 33, around the axis Z15. The body 41, or even the entire cap 11, is made of electrically insulating materials in order to electrically isolate the inside of the housing 5 from the outside. For example, the body 41, or even the entire cap 11, is made of polyamide or polypropylene, or any other suitable polymeric plastic material, which can optionally be loaded with talc or glass. The housing 5 is advantageously made of the same material.

The closure of the opening 15 by the cap 11 is preferably sealed. For this, a seal 21, or any other seal, is advantageously interposed between the clamping assembly 9 and the opening 15. Here, the seal is received in a peripheral groove of the body 41, advantageously formed in a wall external radial 35, or “peripheral wall”, of the body 41, which is in contact with the pipe 33 to form the pivoting connection of the body 41 in the pipe 33. The seal 21 thus surrounds the body 41 around the axis Z15, the seal 21 being in contact over its entire outer periphery around the axis Z15 with the tubular pipe 33.

Alternatively, no seal is provided for the opening 15, the wall 35 being, for example, fitted in the pipe 33 to ensure a certain seal in the closure.

At the base of the body 41, the cap 11 comprises a collar 43, or an increase in diameter, which forms an axial abutment surface of the body 41, turned in the direction B15. Here, the abutment surface is in the form of a crown centered on the axis Z15, and extends in a plane orthogonal to the axis Z15. The housing 5 comprises, at the periphery of the opening 15, an abutment surface 45 turned in the direction F15, which preferably also has the shape of a crown coaxial with the axis Z15. The collar 43 is in abutment against the surface 45 in the direction B15. It is therefore impossible to remove the cap 11 from the housing 5 by pulling the cap 11 in the direction B15, said cap 11 being retained at the housing by its flange 43, then brought into abutment against the surface 45.

In the direction F15, the body 41 abuts against the terminal 7, in particular its part 23 carrying the opening 29. In the present example, the body 41 is in axial abutment in both directions and is therefore fixed, or movable over a small range, axially relative to the housing 5.

Preferably, for the manufacture of the terminal 1, the cap 11 is mounted on the opening 15 while being introduced inside the housing 5, for example via an opening 18 of the housing, here crossed by the axis Z15 and being at the opposite of the opening 15. The opening 18 is then advantageously closed by a cover made of electrically insulating material, not illustrated, for example the same material as the housing 5.

The cap 11 is therefore mounted on the opening 15 in the direction B15, the cap being introduced into the opening 15 from the inside of the housing 5 until the collar 43 is brought into abutment in the direction B15.

Other embodiments of the connection of the body 41 to the opening 15 can be implemented depending on the situation, as long as the body 41 is both pivotable relative to the housing 5 around the clamping axis Z15 and abuts against the housing 5 in the direction B15, indeed, is axially fixed relative to the housing 5.

The body 41 forms a sliding cavity 51, preferably blind in the direction B15. The sliding cavity 51 opening inside the housing 5 in the direction F15, in particular on the opening 29 of the terminal 7. The sliding cavity 51 is coaxial with the axis Z15. Thus, the body 41 forms a bell partially covered by the opening 15, and delimiting the cavity 51 in the direction F15, which makes it possible to guarantee a good, particularly sealed closure of the opening 15. Axially along the axis Z15 , the cavity 51 advantageously crosses the pipe 33, to obtain a good compactness of the terminal 1.

In the example of FIG. 1, the cavity 51 ends with a terminal edge 52, formed at the end of the body 41 in the direction F15. The terminal edge 52 surrounds the axis Z15, and constitutes the end, in the direction F15, of the anti-rotation geometry of the cavity 51. This terminal edge 52 is formed near the opening 29.

On at least part of the axial positions of the screw 13 along the axis Z15, namely on a sliding stroke C13 of the screw 13, the cavity 51 covers the screw head 39, that is to say the wife radially. The cavity 51 and the screw head 39 each have an anti-rotation geometry around the axis Z15. In the present example, the cavity has a female anti-rotation geometry, while the head 39 has a male anti-rotation geometry.

Thanks to this anti-rotation geometry, a slide connection is obtained between the body 41 and the screw head 39. In fact, the complementary anti-rotation geometry of the cavity 51 and of the head 39 are in mechanical cooperation, allowing sliding of the head 39 relative to the cavity 51 on a sliding stroke C13 of the screw 13 along the clamping axis Z15, in the directions F15 and B15. This sliding is obtained as long as the screw head 39 is at least partially covered by the cavity 51. The sliding stroke C13 is therefore defined as all of the axial positions of the screw 13 relative to the body 41, in which the head 39, in particular its anti-rotation geometry, is at least partially in mechanical cooperation with the anti-rotation geometry of the cavity 51, for sliding. The sliding stroke C13 measures, for example, the axial length of the cavity 51. In the example of FIG. 1, the head 39 is capped by the cavity 51 for the entire axial stroke for screwing the screw 13 into the opening 29 , so that the sliding stroke C13 covers a whole screwing stroke V13 of the screw 13 in the opening 29. The screwing stroke V13 covers all the axial positions of the screw between the most unscrewed configuration and the most screwed into the opening 29. The screwing stroke V13 measures, for example, the axial length of the threaded rod 37. For the embodiment of FIG. 1, the sliding stroke C13 cannot be entirely traversed by the screw 13, because the screw travel of the screw 13 limits its axial movement in the direction F15.

Preferably, the axial distance Z52, measured parallel to the axis Z15, between the end edge 52 and the opening 29 is less than the height of the head 39, measured parallel to the axis Z15, which in particular allows at the sliding stroke C13 to cover the entire screwing stroke V13, or at least the end of the screwing stroke V13 including the position where the screw 13 is in maximum screwing in the opening 29.

Thanks to the mechanical cooperation of the anti-rotation geometries, on at least one range C13A of the sliding stroke C13, the screw 13 is linked in rotation with the body 41 around the axis Z15, the head 39 cooperating mechanically with the cavity 51 for rotationally lock the screw 13 relative to the body 41. In other words, the screw 13 is rotated by the body 41 about the axis Z15, and rotates at the same time as the body 41, when a rotation is imparted to the body 41 around the axis Z15. In the example of FIG. 1, no disengagement in rotation of the screw 13 relative to the body 41 is provided for the entire sliding stroke C13, so that the above-mentioned range C13A covers the entire sliding stroke C13, c that is to say that the screw 13 is linked in rotation with the body 41 over the entire stroke C13.

In the example of FIG. 1, the cavity has an anti-rotation geometry, in that it has a female form of straight cylinder with a hexagonal base, coaxial with the axis Z15, that is to say a geometry with six sections. In the example of FIG. 1, the screw head has a male shape of a straight cylinder with a hexagonal base, coaxial with the axis Z15, of shape complementary to the cavity 51. By "straight cylinder" is meant a surface whose the generators are parallel to the axis Z15 and whose base is orthogonal thereto.

Other anti-rotation geometries around the axis Z15 can be envisaged for the cavity 51 and the head 39, for example a straight anti-rotation cylinder, that is to say with a non-circular base blocking rotation, for example a polygonal base , a star base, a square base, etc.

Thanks to this particular connection between the screw 13 and the body 41, and between the body 41 and the housing 5, it is no longer necessary to fix a screw to an insulating cap as in the prior art, and the sealing of opening 15 is easy to secure.

The cap 11 advantageously comprises an actuating head 55 attached to the end of the body 41 in the direction B15. The actuating head 55 is therefore outside the housing, at the top of the body 41, fixed relative to the body 41. The actuating head 55 is coaxial with the clamping axis Z15 and has an anti-rotation geometry, here a straight cylinder with a hexagonal base, to be rotated by a tool. In the example of FIG. 1, the head 55 is formed integrally with the body 41. The screw 13 is therefore rotated about the axis Z15 relative to the housing 5, for its screwing and / or its unscrewing in the opening 29, by actuation of the cap 11 in rotation via the actuation head 55.

Preferably, the cap 11 further comprises a breakable head 53, or fuse head, attached to the end in the direction B15 of the body 41, here by means of the actuation head 55. The breakable head 53 is therefore outside the housing, at the top of the body 41. The breakable head 53 is coaxial with the clamping axis Z15 and has an anti-rotation geometry, here a straight cylinder with a hexagonal base, to be rotated by a tool. In the example of FIG. 1, the breakable head 53 is formed integrally with the body 41. The screw 13 is therefore rotated about the axis Z15 relative to the housing 5, for its screwing and / or unscrewing it in the opening 29, by actuating the cap 11 in rotation via the breakable head 53.

Preferably, the cap 11 formed entirely in one piece in a single material, including the collar 43, and apart from the possible seal 21. As a variant, it is possible to form the breakable head in a material different from the body 41 , for example a metallic material, and to assemble the breakable head 53 with the body 41 to form the cap 11.

Whatever the embodiment of the breakable head 53, the breakable head is configured to break from the body 41, when a torque applied to the breakable head 53 relative to the screw 13, around the axis Z15, exceeds a predetermined value for breaking the breakable head 53.

If the tightening is carried out by means of the head 53, the tightening torque of the end 3 between the screw 13 and the stop 25 is therefore limited to a predetermined value, which in particular avoids damaging the conductive metal strands of the end 3. In fact, too high a tightening torque could damage the conductor end 3. The value of the tightening torque obtained with the breakable head 53 also makes it possible to ensure sufficient electrical contact between the end of conductor 3 and terminal 7, while a too weak tightening might not be enough to ensure satisfactory electrical contact. The terminal 1 therefore makes it possible to apply a tightening torque ensuring the electrical contact, without deterioration of the conductor end 3.

FIG. 2 shows a terminal 101, according to another embodiment of the invention, and comprising the same characteristics as the terminal 1 in FIG. 1, designated by the same reference sign in FIGS. 1 and 2. However, the cap 111 of terminal 101 is modified relative to cap 11 of FIG. 1.

The cap 111 differs from the cap 11 in that it is devoid of the breakable head 53, an actuation head 155, otherwise similar in shape and function to the actuation head 55, forming the end of the cap 111 in direction B15.

The cap 111 differs from the cap 11 in that it lacks the seal 21, an external radial wall 135, moreover similar in shape and function to the wall 35, not carrying a peripheral groove.

The cap 111 differs from the cap 11 in that it comprises a sliding cavity 151, which, apart from the differences mentioned below, is moreover similar in shape and in function to the cavity 51. The cavity 151 is shorter than the cavity 51, and, instead of opening directly into the housing 5, opens into the housing 5 via a conduit 160, formed by the body in the continuity of the sliding cavity 151, in the direction F15, the conduit 160 extending to the end of the body 141, moreover comparable to the body 41. The conduit 160 itself opens directly into the housing 5, on the opening 29 of the terminal 7. The terminal edge 152 of the cavity 151, moreover similar to the end edge 52, constitutes the axial border with the conduit 160, and is therefore no longer formed at the end of the body 41, but at an intermediate axial position of the body 141.

In the example of FIG. 2, the sliding cavity 151 being shorter than the cavity 51, the sliding stroke C113, otherwise similar to the stroke C13, is reduced, and covers only part of the stroke V13 screwing, this part being located in direction B15. For a remaining part D13 of the screwing stroke V13, the screw head 39 is no longer in mechanical cooperation with the cavity 151, and is entirely located in the conduit 160, axially along the axis Z15.

Preferably, the conduit 160 is shaped so that there is no mechanical interaction with the head 39. More specifically, the conduit 160 is configured so that the screw 13 is free to rotate about the axis Z15 by relative to the body 41, when the head 39 is entirely located in the conduit 160, that is to say is on the part D13 of the screwing stroke V13. The screw 13 is then disengaged from the body 41. For this, for example, the conduit 160 is of diameter, or of orthogonal section greater than that of the cavity 151, around the axis Z15. Alternatively, the conduit 160 does not have an anti-rotation shape around the axis Z15, but on the contrary has the shape of a straight cylinder with a circular base.

More generally, for the case of FIG. 2, provision can be made for the end edge, in the direction F15, of the sliding cavity 151, here the edge 152, to be located at an axial distance Z152 from the opening 29, in in particular the edge of the opening 29 located in the direction B15, the axial distance Z152 being sufficiently high that a part D13 of the screwing stroke V13 is not covered by the sliding stroke C113, so that, by being positioned in this part D13, the screw 13 is in an axial declutching position with respect to the body 41, outside of the sliding stroke C113. In its disengaged position, the screw head 39 is entirely outside the cavity 151, and is here entirely in the conduit 160. In particular, the head 39 is then found between the edge 152 and the opening 29. The axial dimension T39 of the screw head 39, measured parallel to the axis Z15, from one end to the other of the head 39, is less than the axial distance Z152.

When the screw 13, in particular the head 39, reaches the part D13 of the screwing stroke V13, any rotation of the cap 111 no longer involves the screwing of the screw 13, which avoids applying a tightening torque too large on the screw 13, which avoids damaging the cable end 3. Nevertheless, a sufficient tightening torque has been applied to ensure the electrical contact. The advantage of this solution compared to the use of a breakable head, such as the head 53, is in particular that no waste is generated. Preferably, after disassembly, the clamping assembly 9 can be reused, since no part of the cap 111 is broken.

FIG. 3 shows a terminal 201, according to another embodiment of the invention, and comprising the same characteristics as the terminal 101 of FIG. 2, designated by the same reference sign in FIGS. 2 and 3. However, the cap 211 and the screw head 239 of the screw 213 of the terminal 201 are modified relative to the cap 111 and the screw head 39 of the screw 13 of FIG. 2.

The screw head 239, and its anti-rotation geometry, is advantageously more elongated in shape than the screw head 39 along the axis Z15, but is moreover similar in form and in function. The threaded rod 237, moreover similar to the threaded rod 37, is shorter, which decreases the screwing stroke V213, compared to the stroke V13.

In the embodiment of FIG. 3, the cap 211 is similar to the cap 111 in form and in function, except for the relative axial dimension of the conduit 260, which is similarly similar to the conduit 160, and of the cavity 251, which is otherwise similar to the cavity 151. Here, the cavity 251 is axially shorter and the conduit 260 longer. For the case of FIG. 3, the axial distance Z252 defined by the edge 252, otherwise similar to the distance Z152 and at the edge 152, is less than the axial dimension T239 of the head 239, so that the screwing stroke V13 is entirely covered by the sliding stroke C13, as in the case of FIG. 1. In the case of FIG. 3, there is therefore no part of the screwing stroke V13 for which the head 239 is entirely out of the cavity 251.

In the embodiment of FIG. 3, provision is also made for the material of the body 241, which is similarly similar to the body 141, to be deformable by the head 239 in certain configurations defined below, whereas, preferably, in the case caps 11 and 111, the material of the body 41 is non-deformable, or marginally deformable by the screw head 39.

The head 239 slides in the cavity 251 according to a sliding stroke C213, similar to the stroke C13, except for the differences below. For the terminal 201 in FIG. 3, the sliding cavity 251 and the screw head 239 are configured so that:

- for the first non-zero range C213A of the sliding stroke C213, the sliding of the screw 13 relative to the body 241 along the axis Z15 is authorized, and the body 241 is linked in rotation with the screw 213 around the Z15 axis, and

- for a second non-zero range C213B of the sliding stroke C13, along the first range C13A in direction F15, the screw 213 is released in rotation relative to the body 241 around the tightening axis Z15, this is ie it is disengaged in rotation while the head 239 is still partially in the cavity 251, along the axis Z15, the head 239 preferably being always guided in sliding with respect to the cavity 251, although slightly looser than for range C213A.

In other words, during the screwing of the screw 213, while the anti-rotation geometry of the head 239 is still engaged with the anti-rotation geometry of the cavity 251, the screw 213 is disengaged in rotation from the body 241 around the axis Z15, so that a rotation of the cap 211 no longer causes the screwing of the screw 213. This makes it possible to limit the tightening torque applied to the screw by screwing and thus preserve the integrity of the cable end clamped between the clamping end 39 of the screw 213 and the contact stop 25 of the terminal 7.

More precisely, when the screw is positioned in the sliding stroke C213, whether in the range C213A or C213B, the form of straight cylinder with an anti-rotation base of the cavity 251 covers, at its periphery around the axis Z15, the straight cylinder shape with anti-rotation base, over a variable length of L239. The grip length L239 is measured parallel to the axis Z15, and corresponds to the length of the head 239 covered by the cavity 251. At the maximum, the grip length L239 measures the axial dimension T239 of the whole head 239, which occurs at the start of the C213 race, on only part of the C213A range. When the screw advances in the direction F15 relative to the body 241, during its screwing, the end of the head 239 emerges from the cavity 251 in the direction F15, that is to say extends partially beyond the terminal edge 252. The length L239 then measures the distance between the end of the head 239 in the direction B15 to the terminal edge 252. As the screwing progresses more, the grip distance L239 is more and more reduced. When the screw passes through the range C213B, the length L239 is sufficiently short so that the mechanical anti-rotation grip of the body 241 on the screw 213 is no longer sufficient to transmit the screwing torque from the cap 211 to the screw 213. Then, it turns out Advantageously produces a creep, that is to say a centrifugal radial deformation of the cavity 251, which no longer causes the head 239 to rotate. In other words, the cap 211 has insufficient mechanical grip to transmit the torque tightening the screw 213, so that the screw 213 is disengaged from the cap 211 in rotation about the axis Z15.

In summary, on the first range C213A, the grip length L239 is greater than a threshold value, so that the body 241 and the screw 213 are linked in rotation about the axis Z15 by mechanical cooperation of the anti-rotation shape of the cavity 251 with the anti-rotation shape of the head 239. In the second range C213B, the grip length L239 is less than the threshold value, so that the screw 213 is released in rotation relative to the body 241 around the axis Z15, the anti-rotation form of the cavity 251 flowing around the anti-rotation form of the head 239 by deformation of the body 241 during rotation.

In addition to the advantage of providing a tightening torque limitation without generating waste, unlike split head systems, this embodiment of FIG. 3 allows the tightening torque to be automatically adapted to the characteristics of the cable end received. , or any end of electrical conductor received. Indeed, the threshold value, that is to say the ratio between the ranges C213A and C213B depends in particular on the diameter and the crushing resistance of the cable end received in terminal 7.

Note that each range C213A and C213B covers part of the tightening stroke V213.

FIG. 4 shows a terminal 301, according to another embodiment of the invention, and comprising the same characteristics as the terminal 201 of FIG. 3, designated by the same reference sign in FIGS. 3 and 4. However, the cap 311 is modified with respect to cap 111. The screw 13 in FIG. 4 is the same as the screw 13 in FIG. 1 and therefore differs from the screw 213. In addition, FIG. 4 shows an end of electrical conductor 303 mounted in the terminal 301, by being inserted in the terminal 7, inside the housing 5, via the opening 17, the end 303 being clamped between the screw 13 and the stop 25, the stop 25 perforating the insulating sheath of the end 303 to reach the electrically conductive core.

In the embodiment of Figure 4, the conduit 260 is absent. In other words, the terminal edge 352 of the sliding cavity 351, otherwise similar to the terminal edge 252 and to the cavity 251, is axially positioned at the end of the body 341, moreover comparable to the body 241, as c 'is the case for example for the terminal edge 52 of Figure 1. Therefore, the distance Z352, otherwise similar to the distance Z252, is relatively reduced, similarly to the distance Z52 presented in Figure 1, so that the sliding stroke C313, otherwise similar to the sliding stroke C213, covers the entire screwing stroke V13 of the screw 13.

The cavity 351 differs in particular from the cavities 251, 151 and 51 in that the cavity 351, rather than being in the form of a straight cylinder with anti-rotation base, coaxial with the axis Z15, has an anti-rotation shape around the axis Z15 which widens in direction F15. In other words, the walls of the cavity 351 are increasingly spaced apart, radially, as the screw head 39 progresses along the cavity 351, in the direction F15. In the opposite direction, in the direction B15, the walls of the cavity 351 converge, that is to say that they are increasingly tight. Preferably, as shown in FIG. 4, the widening of the walls of the cavity 351 along the axis Z15 in the direction F15 is progressive.

For example, as illustrated, the cavity 351 has the shape of a straight truncated cone, with an anti-rotation base, here a hexagonal base, which makes the enlargement of the cavity progressive. By "cone" is meant a surface defined by a straight line, called a generatrix, passing through a fixed point, called a vertex, and by a variable point describing the base of the cone, sometimes called the guide curve of the cone. Here, the top is carried by the axis Z15 in the direction B15 relative to the bottom of the cavity 351. Here, the base of the cone has an anti-rotation shape, in particular hexagonal. The generator passing through a variable point, it sweeps a surface around the axis Z15, which forms the walls having the antirotation geometry of the cavity 351. In the case of the truncated cone, it is a part of the cone stopped by two parallel planes, here perpendicular to the axis Z15, one being positioned at the end edge 352, the other being located at the bottom of the cavity 351, in the direction B15 relative to the end edge 352. The part the wider of the truncated cone of the cavity 351 is oriented in the direction F15, while its narrowest part is oriented in the direction B15, as shown in Figure 4. In other words, its largest base, defined by the terminal edge 352, is turned in the direction F15, while its small base, defined by the bottom of the cavity 351, is turned in the direction B15. The truncated cone is straight, its base is orthogonal to the axis Z15 carrying the top.

Any other anti-rotation shape can be chosen for the base of the truncated cone, for example a non-circular shape such as a star, ellipse, square shape, etc.

Preferably, to obtain the operation described in what follows, the truncated cone defines an angle at the apex a351 of less than 10 between 0 and 10 degrees, for example in the case where the body 341 of the cap 311 is made of polyamide and the screw is aluminum. Note that the plot shown in Figure 4 of the cone shape is exaggerated, the angle a351 being smaller in reality than in Figure 4.

Due to this particular shape of the cavity 351, gradually widening, the mechanical anti-rotation cooperation of the head 39 with the cavity 351 around the axis Z15 takes place with increasing radial clearance, as the sliding of the head 39 along the cavity 351, in the direction F15. Consequently, as the screwing progresses, advancing the screw 13 in the direction F15 relative to the body 341, the mechanical grip of the cavity 351 on the head 39 is less and less strong, so that the torque of screw transmissible to the screw 13 by the cap 311 is weakening, similar to the case of Figure 3. Consequently, depending on the geometric and mechanical characteristics of the end 303 introduced between the end 40 of the screw 13 and the stop 25, the screw 13:

- is driven in rotation by the cavity 351 when the screw 13 is located on the first range C313A, moreover comparable to the range C213A,

- Is released from the rotation of the cavity 351 when the screw 13 is located on the second range C313B, moreover comparable to the range C213B.

In other words, the cavity 351 and the screw head 39 are configured so that, for the range C313B of the sliding stroke C313 along the range C313A of the stroke C313, the screw 13 is released in rotation relative to the body 341 around the Z15 axis.

Here, the geometric and mechanical characteristics of the end 303, as well as the characteristics of the cavity 351, mean that the range C313A is relatively short compared to the range C213A, and that the range C313B is relatively long compared to the range C213B. If a thinner electrical conductor end was inserted in place of the 303 end, the C313B range would be shorter and the C313A range longer, so that a lower clamping force would be applicable on that electrical conductor end less thick.

Rather than a gradual widening of the cavity 351 in the direction F15, one could prefer a sudden widening, to ensure that the screw 13 is disengaged at a precise point in the sliding stroke C313 during screwing. One could also provide a stepped widening, obtained for example by a staircase shape of the cavity 351.

A radial thickness E341 is defined, measured radially with respect to the axis Z15, at the height of the sliding cavity 451, radially from the sliding cavity 351 to the external radial wall 135. The radial thickness E341 represents the thickness of the material of the body 341 to delimit the cavity 51 peripherally around the axis Z15. The smaller the thickness E341, the more locally the body 341 is deformable, while if the thickness E341 is greater, obtaining local deformation of the body 341 will require greater effort. The wall 135 being cylindrical all along the sliding cavity 351, the widening shape of the cavity 351 means that the radial thickness E341 decreases, along the cavity 351, in the direction F15, so that the thickness radial E341 is weaker at the outlet of the cavity 351 than at the bottom, so that the cavity 351 is more easily deformable radially at the outlet than at the bottom, which facilitates the disengagement of the screw 13 when approaching the outlet.

Alternatively or jointly with the enlarged shape in the direction F15 of the cavity 351, it can be provided that the screw head gradually widens in the direction F15, and has for example a frustoconical anti-rotation shape, the widest base of which is turned in direction F15. This achieves effects similar to the enlarged shape of the cavity 351.

FIG. 5 shows a terminal 401, according to another embodiment of the invention, and comprising the same characteristics as the terminal 1 of FIG. 1, designated by the same reference sign in FIGS. 1 and 5. However, the cap 411 of terminal 401 is modified relative to cap 11.

The cap 411 differs from the cap 11 in that it does not have the breakable head 53, an actuation head 455 similar to the actuation head 155 being provided at the end of the cap 411 in the direction B15.

The cap 411 differs from the cap 11 in that it lacks the seal 21, a peripheral wall 435, moreover similar to the wall 35, not carrying a peripheral groove. The peripheral wall 435 has another difference with respect to the wall 35, namely that, rather than being cylindrical in shape with a circular base, the peripheral wall 435 is in the form of a straight truncated cone, the apex of which is carried by the axis Z15 in the direction F15 relative to the terminal edge 52. More generally, the body 441, moreover similar to the body 41, has a radial thickness E441, measured radially with respect to the axis Z15, at the height of the cavity sliding 51, radially from the sliding cavity and the radial wall 435. The radial thickness E441 represents the thickness of the material of the body 441 to delimit the cavity 51 peripherally around the axis Z15. The smaller the thickness E441, the more the body 441 is locally deformable, while if the thickness E441 is greater, obtaining a local deformation of the body 441 will require greater effort, with material constituting the body 441 identical. In the case of FIG. 5, the radial thickness E441 becomes weaker in the direction F15, so that the body 441 is more easily deformable by the screw head 39 near the terminal edge 52, than near from the bottom of the cavity 51. Consequently, the anti-rotation cooperation of the screw head 39 with the sliding cavity 51 takes place with a radial deformability of the body 41 which increases, as the head of the sliding slides screw 39 along the cavity 51, when the screw progresses in the direction F15. In other words, due to the variation in thickness E441, the anti-rotation grip of the cavity 51 is stronger at the end of the cavity 51 in the direction B15, and weaker at the other end of the cavity 51 in direction F15.

Consequently, as in the case of FIGS. 3 and 4, it is obtained that the body 441 and the screw head 39 are configured so that:

for a first range C413A of the sliding stroke C413, moreover similar to the sliding stroke C13, sliding of the screw 13 is authorized relative to the body 441 along the axis Z15, while the body 441 and the screw 13 are linked in rotation about the axis Z15, and

- For a second range C413B of the sliding stroke C413, along the first range C413A in the direction F15, the screw 13 is released in rotation relative to the body 441 around the axis Z15, and the sliding of the screw 13 always allowed with respect to body 441 along the axis Z15.

For the present invention, any recess made in the body and extending the sliding cavity, such as the conduit 160, is not considered to belong to the sliding cavity. Within the meaning of the invention, "sliding cavity" relates only to the part carrying the anti-rotation geometry of the body of the cap, the anti-rotation geometry preferably covering continuously the sliding cavity, over its entire axial length.

For the present invention, "screw head" relates only to the part of the screw carrying the anti-rotation geometry of the screw, this anti-rotation geometry advantageously extending continuously over the entire axial dimension T39 or T239 of the screw head.

The particular characteristics of each preceding embodiment can be implemented in the other embodiments, as far as technically possible. For example, provision may be made for the terminal to have both a sliding cavity conforming to that of the embodiment of FIG. 4, while the external radial wall of the body also has a conical shape as in FIG. 5, so to vary all the more, or differently, the radial thickness of the body around the sliding cavity. For example, provision may be made for the presence of the conduit as in FIG. 2, so that the end edge of the cavity is offset with respect to the end of the body in the direction F15, while the cavity is otherwise of the shape non-cylindrical shown in Figure 4 and / or that the outer radial wall has the shape provided in Figure 5. One can also introduce a breakable head according to the example of Figure 1, on each of the embodiments of Figures 2 at 5.

Claims (10)

1Terminal (1; 101; 201; 301; 401) for electrical connection of one end of electrical conductor (3; 303), the terminal (1; 101; 201; 301; 401) comprising: - an electrically insulating housing (5), comprising a clamping opening (15) coaxial with a clamping axis (Z15) of the terminal (1; 101; 201; 301; 401); - an electrical terminal (7), enclosed in the housing (5) and comprising a threaded opening (29) coaxial with the clamping axis (Z15), the clamping opening (15) opening onto the threaded opening (29 ); and - a clamping assembly (9), comprising: o a screw (13; 213), which is coaxial with the tightening axis (Z15) by being screwed into the threaded opening (29) and which comprises a screw head (39; 239) having a first anti-rotation shape around the clamping axis (Z15); and o a cap (11; 111; 211; 311; 411), which comprises an electrically insulating body (41; 141; 241; 341; 441); characterized in that the body (41; 141; 241; 341; 441): - is mounted on the clamping opening (15), by pivoting relative to the housing (5) around the clamping axis (Z15), and being in abutment against the housing (5) in a direction of unscrewing (B15) of the screw (13; 213), parallel to the clamping axis (Z15); and - Forms a sliding cavity (51; 151; 251; 351), opening into the housing (5) and having a second anti-rotation shape around the clamping axis (Z15), so that the sliding cavity (51; 151; 251; 351) mechanically cooperates with the screw head (39; 239) to: o allow the screw (13; 213) to slide relative to the body (41; 141; 241; 341; 441) along the tightening axis (Z15), thus defining a sliding stroke (C13; C113; C213; C313; C413) of the screw (13; 213) relative to the body (41; 141; 241; 341; 441) along which the screw head (39; 239) is at least partially in the sliding cavity (51; 151; 251; 351), and o for at least a first area (C13A; C213A; C313A ; C413A) of the sliding stroke (C13; C113; C213; C313; C413), rotate the body (41; 141; 241; 341; 441) and the screw (13; 213) around the axis of the tightening (Z15). 2. - Terminal (1) for electrical connection according to claim 1, characterized in that the cap (11) comprises a breakable head (53) attached to the body (41) outside the housing (5), the breakable head (53) being coaxial with the clamping axis (Z15). 3. - Terminal (201; 301; 401) according to any one of the preceding claims, characterized in that the body (241; 341; 441) and the screw head (39; 239) are configured so that, for a second range (C213B; C313B; C413B) of the sliding stroke (C213; C313; C413) along the first range (C213A; C313A; C413A) in a direction of screwing (F15) of the screw (13; 213) at the clamping axis (Z15), the screw (13; 213) is released in rotation relative to the body (41; 141; 241; 341; 441) around the clamping axis (Z15). 4. - Terminal (301; 401) according to claim 3, characterized in that, the body (341; 441) has a radial thickness (E341; E441), measured radially with respect to the clamping axis (Z15), along the sliding cavity (51; 351), between the sliding cavity (51; 351) and an external radial wall (135; 435) of the body (341; 441), the radial thickness (E341; E441) weakening in the direction of screwing (F15), so that the mechanical cooperation of the screw head (39; 239) with the sliding cavity (51; 351) takes place with a radial deformability of the body ( 341; 441) which is increasing, during the sliding of the screw head (39; 239) in the sliding cavity (51; 351) in the direction of screwing (F15). 5. - Terminal (301) according to any one of claims 3 or 4, characterized in that the sliding cavity (351) widens in the screwing direction (F15), so that the mechanical cooperation of the screw head (39) with the sliding cavity (351) takes place with increasing radial clearance, when the screw head (39) slides in the sliding cavity (351) in the screwing direction (F15) . 6. - Terminal (301) according to claim 5, characterized in that the anti-rotation form of at least one element, among the sliding cavity (351) and the screw head (39), is a form of truncated cone anti-rotation, the largest base of which is directed in the direction of screwing (F15). 7. - Terminal (201) according to claim 3, characterized in that: - the second anti-rotation form of the sliding cavity (251) is a form of anti-rotation cylinder, coaxial with the clamping axis (Z15); - The first anti-rotation shape of the screw head (239) is a form of anti-rotation cylinder, coaxial with the clamping axis (Z15) and complementary with the second form; and - for the entire sliding stroke (C213) of the screw (213) in the body (241), the second anti-rotation form covers the first anti-rotation form, parallel to the tightening axis (Z15), over a length of grip (L239) which: o on the first range (C213A), is greater than a threshold value, so that the body (241) and the screw (213) are linked in rotation around the tightening axis (Z15) by mechanical cooperation of the sliding cavity (251) with the screw head (239); and o on the second range (C213B), is less than the threshold value, so that the screw (213) is released in rotation relative to the body (241) around the tightening axis (Z15), the cavity sliding (251) flowing around the screw head (239) during rotation. 8. - Terminal (101) according to any one of the preceding claims, characterized in that, along the clamping axis (Z15), the sliding cavity (151) ends in a terminal edge (152) which is located at an axial distance (Z152) from the threaded opening (29), which is greater than at least the axial dimension (T39) of the screw head (39), measured parallel to the tightening axis (Z15) , so that the screw (13) can reach a disengaged position, along the tightening axis (Z15), outside the sliding stroke (C113), in which the screw head (39) is entirely out of the sliding cavity (151), between the end edge (152) and the threaded opening (29). 9. - Terminal (1; 101; 201; 301; 401) according to any one of the preceding claims, characterized in that the electrical terminal (7) comprises, along the clamping axis (Z15), a stop contact (25) located at a distance from the threaded opening (29), the threaded opening (29) being located between the clamping opening (15) and the contact stop (25), the electrical terminal (7) being configured to receive the end of the electrical conductor (3; 303) between a tightening end (40) of the screw (13; 213), opposite the screw head (39; 239), and the contact stop ( 25), the end of the electrical conductor (3; 303) being able to be pressed against the contact stop (25) by the clamping end (40), by screwing the screw (13; 213). 10.- Electrical device, comprising one or more terminals (1; 101; 201; 301; 401) electrical connection according to any one of the preceding claims.