JP5581327B2 - Pivoting mechanism for locking tripping circuit breaker type electric device that cuts off circuit - Google Patents

Description

  The present invention relates to a pivot mechanism for tripping a circuit breaker type line switching electrical apparatus. Conventionally such devices can move between two positions: a position that contacts a fixed contact that corresponds to closing the electrical circuit and a position that is away from the fixed contact that corresponds to opening an electrical line. At least one movable contact is provided.

  This mechanical lock is actuated between its two positions by means of a movable contact control lever, in particular with two parallel branches that connect the lever to the movable contact (s). A toggle, means for returning the toggle to the open position, and a tripper pivoting relative to the toggle by a pivoting mechanism. The function of this tripper is to trip the lock so that the electrical device is in the open position of the contacts.

  Such a mechanical locking pivot mechanism cannot employ a conventional form of shaft that freely rotates on a bearing. This is because in this case the return means consists of a spring extending between the branches of the toggle and therefore cannot pass through a single transverse axis connecting the branches. Thus, in the current configuration, pivoting is performed on each side by a journal or equivalent that protrudes from one element of the toggle and pivots on a bearing of a tripper, usually a round opening.

  An inverted U-shaped lever integral with the control lever is at the top of the toggle / tripper assembly. The side walls are pressed outwardly and cover the toggle / tripper pivot, more particularly the part of the journal protruding from the outer surface of the tripper from both sides.

  This solution can cause the free end of the journal to cause untimed friction on the inner surface of the U-shaped lever sidewall, making operation less “smooth”, which can cause component wear. is there. This solution may be based on the fact that the journal does not protrude too much from the tripper opening. However, the tripper sidewalls tend to move away from each other during tripping, particularly in the region of the pivot, and in the worst case the toggle and the tripper can be separated. Thus, a compromise should be found in choosing the journal height so that friction is reduced as much as possible, but the separation does not occur.

  The present invention proposes a solution based on a configuration that does not utilize the above-described structure, operates without friction and prevents disconnection.

  According to the invention, the tripper is provided with two openings facing each other and provided in the side wall, which side wall is perpendicular to the pivot axis and of the two parallel arms of the first element of the toggle. Forming a bearing that enables a pivotal connection for the openings, the openings being arranged at lateral offsets towards the outside or inside of the respective side walls and perpendicular to the walls for the passage of the arms Grooves are formed. This groove, on the one hand, is provided in a non-offset part of the wall and extends into a first opening that allows insertion of the end of the arm, and on the other hand opens towards the inside or outside of the wall. Extending into a second opening in the offset portion, at least partially provided with a bottom to create a housing, the edge of the housing is rounded and the rounded open end of the toggle arm It is designed to guide the rotation.

  The special shape of the openings facing each other, as well as the offset configuration provided on the side walls at the openings, allows the insertion of the toggle elements with the fasteners properly fastened inside the tripper, which allows further rotation. The degree of freedom is maintained.

  Also, this solution of the present invention obtains all shapes by cutting, cambering, embossing / stamping so as to facilitate the manufacture of the components of this mechanism by conventional mechanical technology that can be automated. Designed to be able to.

  One problem that designers face with this type of pivot is caused by the presence of special mechanical stresses when opening the electrical switching device in the case of problems due to overloading or overvoltage on the circuit.

  In this case, it is self-evident that a sudden impact when opening must not deform the pivotal connection that is the subject of the present invention, and in any case, it cannot be restored / destroyed.

  The design of the pivoting mechanism as described above actually maintains the first element of the toggle in a bearing formed by a specially shaped opening actually provided in the side wall of the tripper under all circumstances. Make it possible.

  According to the assumptions of the invention, there is no possibility of an exit on the side, because there is a bottom that fits the second part of the respective opening on both sides of the pivot axis, for example obtained by embossing.

  When combined with the special shape of the opening, the offset between the plane of the arm end of the toggle element and the tripper wall at each opening allows one to be assembled inside the other, In the attached position, it becomes possible to lock one inside the other, which does not interfere with the pivoting movement required for the operation of the assembly.

  According to one possible configuration of the toggle, the rounded end planes are located within the extension of each arm that is offset laterally toward the opposite arm.

  For this reason, in the mechanism according to the invention, there are double offsets which are arranged on the one hand on the arm and on the other hand in the opening provided in the side wall of the tripper. In the mounting position, these two offsets are staggered, increasing the rigidity of the connection and ensuring its safety. That is, the components are permanently connected.

  In fact, the two parts of each opening are partly separated by a cam that guides the end of the toggle arm from the first part to the second part of the respective opening, said cam being said end Each of the ends is arranged to stop within the housing when the portion is inserted into the housing.

  The presence of this cam ensures that these parts can be pressed against each other when a sudden movement occurs due to the opening of the lock and that movement is transmitted to the mechanical connection between the toggle and the tripper. Makes it possible to prevent these disconnections, thereby responding to their tendency to leave, and even preventing the toggle arms from exiting their openings.

  For this purpose, the cam forms a first part as a rounded curve in the vicinity of the first part of the opening, followed by a stopper in its housing that stops the end of the arm. A top.

  The bottom of the second part of each opening and the offset of the toggle arm end are preferably obtained by stamping / embossing.

  Therefore, the production is carried out by simple operations that can be easily automated and controlled in an industrial production method.

  One of the technical advantages of the pivot mechanism of the present invention is that it has a special configuration that avoids friction between the toggle arm and the reverse lever fastened to the control lever of the electrical equipment equipped in such a system. is there. A second important advantage comes from the fact that the toggle arm is held laterally, which is guaranteed by the particular configuration used.

  The present invention will be described in more detail with reference to the accompanying drawings.

It is a perspective view of a toggle. It is a perspective view which shows a part of switching device provided with the pivot mechanism of this invention. It is a front view of the figure of FIG. FIG. 4 is an enlarged detailed cross-sectional view showing a right pivot part of FIG. 3. FIG. 4 is a symmetrical central view showing a pivot mechanism according to the present invention.

  Referring to FIG. 1, the toggle consists of a pair of upper arms (1, 2) hinged on a pair of lower connections (4, 5) by a shaft (3). The pair of arms (1, 2) / the pair of connecting portions (4, 5) is a branch in the parallel direction of the toggle. This toggle makes it possible to retransmit the movement of the control member (not shown) in the opening and closing directions to one movable contact. In addition, a toggle is provided in a lock for tripping the switching device according to the invention so as to be pivotally connected to a so-called tripper part (6), which is a stable position provided by closing the contact. Can be opened according to conventional designs, which are well known per se, in particular via return means.

The tripper (6) can be seen in FIG. The tripper (6) is a part having two side walls (7, 8), the two side walls (7, 8) each having an orifice (9, 10) in which the connection part is located. The arms (1, 2) are inserted. Such orifices (9, 10) is seen in more detail in FIGS. 2 and 5, are disposed on the side wall (7, 8) having an offset portion in the lateral direction toward the outer side (11, 12). As a result, the rounded ends (13, 14) of the arms (1, 2) have inwardly offset portions obtained, for example, by stamping.

The shape of the orifices (9, 10) can be seen in more detail in FIG. The first part (15) of the orifice (9), located in the part of the side wall (7) that is not offset, allows the rounded end (13) of the toggle arm (1) to be inserted. The second part (16) of the orifice (9), arranged in the offset part (arranged above the offset part (11) of the side wall (7)) is the end (13) of the arm (1). And has a rounded shape capable of accommodating a bottom and an outwardly facing bottom that completes the housing. That is, the housing provided in the second part (16) of the orifice (9) opens towards the inside of the side wall (7) and is offset towards the outside of the arm (1) ( 13) Accommodates (see FIG. 1), thereby preventing the arm (1) from moving laterally outward.

The cam (17) makes it possible to guide the end (13) of the arm (1) of the first part (15) of the orifice (9), thereby the end (13) of the arm (1). ) Is inserted into the second part (16), where it is permanently accommodated. The cam (17) also holds the end (13) in the second part (16) of the orifice (9) and prevents the insertion path from going backwards from the toggle into the tripper (6). .

The cam (17) is located in the first part (15) of the orifice (9), i.e. located in the side wall of the tripper (6) which does not offset outward. The special shape of the orifice (9) and on the one hand the rounded ends (13, 14) of the arms (1, 2) (see FIG. 1) and on the other hand the side walls (7, 8) of the tripper (6) Due to the double reverse offset of the upper part, the pivoting part provides a free pivoting range for the two parts and can be fully operated while preventing possible impacts.

  Referring to FIG. 5, the control is carried out to facilitate the transmission of the movement of the control lever (19) to the toggle via the tripper (6) against the powerful return means used in this type of production. An inverted U-shaped lever (18) integral with the lever (19) cooperates with one of the rounded protrusions (20) of the tripper (6) via the curved surface (21) of the lever (18). Note that.

  Of course, the examples of the embodiments shown in the drawings do not cover the present invention and are combined with, for example, offset parts (11, 12) facing inward of the side walls (7, 8) of the tripper (6). Variations may be included, such as an offset portion towards the outside of the rounded ends (13, 14) of the arms (1, 2).

Claims (5)

A pivoting mechanism for mechanical locking for tripping a circuit breaker type circuit switching electrical device, the position contacting the corresponding fixed contact when the circuit is closed, and the fixing corresponding when the circuit is opened At least one movable contact adapted to move between two positions away from the contact, wherein the lock is actuated between the two positions by a control lever (19) of the movable contact A toggle for connecting the lever (19) to the plurality of movable contacts, means for returning the toggle to the open position, and pivoting relative to the toggle by the pivot mechanism, and tripping in the open position In a pivoting mechanism comprising a tripper (6) adapted to do so, two provided in the mutually facing side walls (7, 8) of the tripper (6) Orifice (9, 10) said tripper (6) wherein the two orifices (9, 10) is perpendicular to the pivot axis of the tripper (6), the first element of the toggle Forming bearings that allow a pivotal connection for two parallel arms (1, 2), the two orifices (9, 10) being laterally directed outward or inward of the side walls (7, 8) Arranged in a direction offset part (11, 12) and forming a groove perpendicular to the side wall (7, 8) for passing the arms (1, 2), said groove, on the one hand, Extending into the first part (15) of the orifice (9) provided in the non-offset part of the side walls (7, 8) and allowing the insertion of the ends of the arms (1, 2); An orifice that opens towards the inside or outside of the side wall (7, 8) Ri comprises a bottom section for issuing, extending the second portion (16) within the orifice (9) in said offset portion, the edge of the orifice, rounded, rounding said toggle arm (1,2) A pivoting mechanism, characterized in that it is adapted to guide the rotation of the end portions (13, 14) bearing a bearing .   The plane of the rounded end (13, 14) is arranged in an extension that is laterally offset towards the arm opposite the respective arm (1, 2). A pivot mechanism for a mechanical lock for tripping the electric circuit switching electric device according to Item 1. The two first portions (15) and the second portion (16) of each orifice (9, 10) connect the ends (13, 14) of the arms (1, 2) of the toggle, Each orifice (9, 10) is separated by a cam (17) that guides from the first part (15) to the second part (16), said cam (17) being said end (13). 14) are each arranged to stop the end therein when inserted into the orifice , respectively. Pivoting mechanism for mechanical locking to trip. The cam (17) is in the vicinity of the first part (15) of the orifice (9, 10), a first orifice part as a rounded curve, followed by the arm (1, A mechanical lock for tripping a circuit switching electrical device according to claim 3, characterized in that it comprises a top that forms a stop in the orifice to stop the end (13, 14) of 2). Pivoting mechanism. The bottom of the second part (16) of each orifice (9, 10) and the offset of the ends (13, 14) of the arms (1, 2) of the toggle are stamped / embossed. 5. A pivoting mechanism for a mechanical lock for tripping a circuit switching electrical device according to claim 1, characterized in that it is obtained by machining.

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