Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/16—Magnetic circuit arrangements
  • H01H50/18—Movable parts of magnetic circuits, e.g. armature
  • H01H50/32—Latching movable parts mechanically
  • H01H50/323—Latching movable parts mechanically for interlocking two or more relays
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/02—Bases; Casings; Covers
  • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
  • H01H2050/049—Assembling or mounting multiple relays in one common housing
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
  • H01H2300/06—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using tools as locking means

Definitions

• the invention relates to a locking device for preventing the simultaneous activation of two electromagnetically actuated contactors forming a switching block, and an auxiliary tool for producing such a locking device according to the preambles of the independent claims.
• a locking device for laterally connected contactors is known, the actuators of the movable contacts are electromagnetically displaced substantially perpendicular to the connecting side walls.
• the two contactors are accommodated by a common lower housing part.
• the actuators of both contactors have projections opposite each other which step back towards the connection side walls and between which a locking pin is mounted which is displaceable perpendicularly to the connection side walls provided with openings at this point.
• the holding force of the electromagnetic drive of the contactor that is already switched on is greater than the pulling force of the electromagnetic drive of the other contactor, which prevents the actuating member of the other contactor from going into the switch-on position.
• the disadvantage of this locking device is that on the one hand a movement of the actuating members perpendicular to the connecting side walls is a prerequisite and that the locking is no longer guaranteed if the electromagnetic drives - as generally aimed - are operated with a holding power that is significantly lower than the pulling power.
• the cutouts are each delimited by a front, a middle and a rear inner surface which extend parallel or perpendicularly or obliquely to the front sides.
• the armature When the electromagnetic drive of a contactor is energized alone, the armature is pressed out of the recess of the actuating member of this contactor into the recess of the actuating member of the other contactor, which means that it is effectively locked for switching on.
• the two contactors are connected via connecting elements, which engage around like ribs extending from the connecting side walls with outer legs and engage with a middle leg in a form-fitting manner in a recess formed in the connecting side walls.
• This locking device additionally requires two complicated parts for the bearing element and the armature, which are associated with high tool costs.
• the existing blocking stroke of the locked contactor requires precise coordination between the geometries of the first slots, the bearing elements, the armature, the cutouts and the geometry, bearing and kinematics of the actuators.
• the publication US 4 409 575 A shows a mechanical locking device for mechanically connected contactors with a locking element designed as a rolling element such as a cylindrical roller or hollow cylindrical roller, which is mounted in a connecting frame between the spaced-apart contactors and is actuated by the contact frame of the respectively excited contactor.
• a locking element designed as a rolling element such as a cylindrical roller or hollow cylindrical roller, which is mounted in a connecting frame between the spaced-apart contactors and is actuated by the contact frame of the respectively excited contactor.
• the disadvantage here is the requirement for the connecting frame and the associated space-consuming distance between the opposite side walls of the two contactors.
• the invention is based on the object of realizing the mutual interlocking of two contactors with a direction of movement of the actuating members running parallel to the connecting width walls in a simplified manner.
• the locking device according to the invention simply requires an additional part in the form of a rolling element, which cooperates as a connecting element with spherical recesses in the actuating members.
• This type of locking means that the contactor to be locked has a very low idle stroke, which increases the reliability and allows the designer to easily calculate the clearance stroke.
• the electromagnetic drives can be operated with significantly reduced holding power.
• the locking element can be implemented inexpensively by means of a commercially available purchase part in the form of a ball, a cylindrical roller, a barrel roller or a disc.
• the auxiliary tool according to the invention simplifies the assembly of the locking device according to the invention.
• the locking element with its opposite partial surfaces directed perpendicular to the connecting side walls and the direction of movement of the actuating members, is held elastically in a receiving space formed by the fork slot.
• the two contactors are to be placed at such a small distance from their connecting side walls that the locking element held between the fork tines can reach the area of the openings in the connecting side walls with the auxiliary tool.
• the locking element reaching flat on the auxiliary tool is caught within the opposite openings, as a result of which the auxiliary tool can be detached from the locking element and removed from the space between the connecting side walls.
• the locking device is completed by finally moving the contactors together.
• the mounting of the locking element is made more secure by adapting the flat fork slots to the shape of the locking element to be held.
• the two-sided design of the auxiliary tool for holding a locking element is used to hold either a replacement locking element or, preferably with appropriate adaptation, a locking element of a different shape between the second head end.
• FIG. 1 the arrangement of two laterally connected, lockable contactors
• FIG. 2 the locking device according to the invention as detail II from FIG. 1;
• Figure 3 an auxiliary tool according to the invention for producing the locking device according to the invention in a perspective view (Fig. 3a) and in a somewhat enlarged sectional view through the central plane (Fig. 3b).
• FIG. 1 two mutually lockable contactors 2a and 2b are shown side by side.
• the contactors 2a, 2b are attached to a mounting base, not shown, for example a standard mounting rail.
• the contactor 2a shown on the left connects with its right-hand connecting side wall 4a directly to the left-hand connecting side wall 4b of the contactor 2b shown on the right.
• the two contactors 2a, 2b are connected flush with one another in the usual way, for example as described in DE 195 48 480 C1, by means of clamp-like connecting elements 5 on opposite sides. This means that the contactors 2a, 2b can no longer move apart.
• connection side walls 4a, 4b each have an opening 6a or 6b opposite one another.
• a section of an actuating member 8a or 8b is located in the immediate vicinity of the connecting side walls 4a, 4b.
• the actuators 8a, 8b are on the one hand operatively connected or coupled to the electromagnetic drives and on the other hand to the movable contacts of the contactors 2a and 2b.
• the direction of movement of the actuators 8a, 8b runs parallel to the connecting side walls 4a, 4b and perpendicular to the front sides 10a, 10b of the contactors 2a and 2b.
• the actuating members 8a, 8b are provided with recesses 12a and 12b in the form of spherical caps.
• the recesses 12a, 12b are open to the adjacent connecting side wall 4a or 4b.
• a locking element 14 in the form of a spherical rolling element made of metal, ceramic, plastic or glass-containing material is mounted within the openings 6a, 6b. To the left and to the right, the locking element 14 is held by the adjacent sections of the actuating members 8a, 8b and, moreover, by the lateral boundaries of the openings 6a, 6b.
• both actuators 8a and 8b assume the upper position shown in FIG. 2 for the actuator 8a shown on the left. In this situation, the locking element 14 is loosely supported between the two cutouts 12a and 12b, which face each other directly through the openings 6a and 6b. If one of the two contactors 2a or 2b is switched on from this initial situation, its actuating element 8a or 8b can move freely from top to bottom with respect to the representation of FIG. 2. 2 shows the case in which the contactor 2b arranged on the right has been switched on.
• the locking element 14 comes out of the area of the recess 12b and is moved through the openings 6b and 6a to the left into the recess 12a of the actuating member by the non-recessed part of this actuating member 12b 8a displaces the contactor 2a shown on the left.
• the contactor 2a arranged on the left is thus locked against being switched on. Because in an attempt to also switch on the left-hand contactor 2a, the prevented escape of the locking element 14 to the right means that the actuating element 8a of the left-hand contactor 2a has its recess 12a to get out of the engagement of the locking element 14.
• both actuators 12a and 12b With simultaneous excitation of the electromagnetic drives of both contactors 2a and 2b, both actuators 12a and 12b are prevented from moving downward as shown in FIG. 2, since the two dome-shaped recesses 12a and 12b do not come out of the engagement of the locking element 14 at the same time can reach.
• both contactors 2a and 2b When trying to switch on both contactors 2a and 2b at the same time, they are kept in the non-switched on state in accordance with the regulations. So there can be no race between the contactors 2a, 2b.
• the fitter can use the auxiliary tool 20 shown in FIG. 3.
• the elongated auxiliary tool 20 is made of elastic material, preferably of plastic, and is formed on both head ends 21 for receiving the spherical locking element 14.
• the head ends 21 are split symmetrically into fork tines 22.
• a locking element 14 can be held clamped.
• the fork slots 30 in the region of the receiving spaces 28 are shaped in the shape of a spherical cap towards the narrow sides 26 in adaptation to the spherical shape of the locking element 14.
• an opening width of the fork slots of 3 ⁇ of the ball diameter of the locking element 14 and a maximum distance of the dome inner surfaces facing each other in the receiving spaces 28 of somewhat less than the ball diameter have proven to be advantageous.
• the opening width is 3 mm and the maximum distance between the dome inner surfaces is 3.8 mm.
• the locking element 14 is received in the auxiliary tool 20 in such a way that it projects with a part of its surface over the flat sides 24.
• the auxiliary tool 20 provided with the locking element 14 can, when its flat sides 24 face the connecting side walls 4a, 4b, extend between the contactors 2a, 2b and bring the locking element 14 into the area of the openings 6a, 6b. If the contactors 2a, 2b are now brought closer to each other, the locking element 14 is held by the openings 6a, 6b and, when the auxiliary tool 20 is withdrawn, comes out of the engagement of the fork prongs 22. Finally, the contactors 2a, 2b can be pushed together flush and are connected to the connecting elements 5, whereupon the locking device 1 is fixed.
• the locking device 1 can also be realized with a cylindrical roller, a barrel roller, a circular disk or a long disk as a locking element.
• the cutouts 12a, 12b on the actuating members 8a, 8b and the shape of the flat fork slots 30 of the auxiliary tool 20 are accordingly to be adapted to the shape of the locking element.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Switch Cases, Indication, And Locking (AREA)
• Portable Power Tools In General (AREA)
• Auxiliary Devices For Machine Tools (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Sawing (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Accommodation For Nursing Or Treatment Tables (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=33394975

Family Applications (1)

Country Status (8)

Families Citing this family (5)

Family Cites Families (16)

• 2003
  • 2003-06-25 DE DE10328499A patent/DE10328499B3/de not_active Expired - Fee Related
• 2004
  • 2004-06-09 WO PCT/EP2004/006217 patent/WO2004114344A1/fr not_active Ceased
  • 2004-06-09 EP EP04736389A patent/EP1527471B1/fr not_active Expired - Lifetime
  • 2004-06-09 JP JP2006515287A patent/JP4241824B2/ja not_active Expired - Lifetime
  • 2004-06-09 US US10/540,322 patent/US7294798B2/en not_active Expired - Lifetime
  • 2004-06-09 CN CNB200480017823XA patent/CN100424803C/zh not_active Expired - Lifetime
  • 2004-06-09 DE DE502004001580T patent/DE502004001580D1/de not_active Expired - Lifetime
  • 2004-06-09 ES ES04736389T patent/ES2274459T3/es not_active Expired - Lifetime
  • 2004-06-09 AT AT04736389T patent/ATE341094T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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