SU832611A1

SU832611A1 - Contact device

Info

Publication number: SU832611A1
Application number: SU782653111A
Authority: SU
Inventors: Владимир Маркович Мергольд; Владимир Ильич Мишкович; Евгений Константинович Полибин
Original assignee: Ростовский Инженерно-Строительныйинститут
Priority date: 1978-07-31
Filing date: 1978-07-31
Publication date: 1981-05-28

Description

(54) КОНТАКТНОЕ УСТРОЙСТВО(54) CONTACT DEVICE

II

Изобретение относитс к электроаппаратостроению и может быть использовано в низковольтных коммутационных аппаратах и блок-контактах контакторов.The invention relates to electrical equipment and can be used in low-voltage switching devices and auxiliary contacts of contactors.

Известен контактный блок, содержащий подвижную траверсу, в окнах которой расположены контактные мостики и контактные пружины, и неподвижные контакты. Опорные поверхности окон имеют скос в направлении, перпендикул рном продольной оси мостика. Благодар этому до замыкани контактов мостик фиксируетс в наклонном положении относительно плоскости неподвижных контактов , а после соприкосновени подвижных и неподвижных контактов мостик поворачиваетс с проскальзыванием вокруг продольной оси и располагаетс параллельно неподвижным контактам 1.Known contact block containing a movable yoke, in the windows of which are contact bridges and contact springs, and fixed contacts. The bearing surfaces of the windows have a bevel in the direction perpendicular to the longitudinal axis of the bridge. Due to this, before closing the contacts, the bridge is fixed in an inclined position relative to the plane of the fixed contacts, and after touching the moving and fixed contacts, the bridge rotates with slippage around the longitudinal axis and is arranged parallel to the fixed contacts 1.

Однако такой контактный блок не обеспечивает надежной коммутации.;However, such a contact block does not provide reliable switching .;

Наиболее близким к предлагаемому по технической сущности вл етс контактное устройство, содержащее подвижную траверсу с прорезью, имеющей двускатную нижнюю стенку, подпружиненный контактный мостик, помещенный в этой прорези, и не2 .The closest to the proposed technical entity is a contact device containing a movable traverse with a slot having a gable bottom wall, a spring-loaded contact bridge placed in this slot, and not 2.

подвижные контакты, закрепленные на токопровод щих контактодержател х 2.movable contacts fixed to conductive contact holders 2.

Это контактное устройство обеспечивает дл каждой пары контактов поочередное замыкание и размыкание цепи нагрузки, что повышает срок службы контактного узла.This contact device provides for each pair of contacts alternately closing and opening of the load circuit, which increases the service life of the contact node.

Однако в этом устройстве нет гарантии строгого соблюдени поочередности замыкани контактов, так как смещение и очередность установлени наклонных исходных положений контактодержател завис т от чистоты поверхности и степени износа контактов .However, in this device there is no guarantee of strict compliance with the contact closure sequence, since the displacement and the order in which the inclined initial positions of the contact carrier are established depend on the cleanliness of the surface and the degree of contact wear.

Цель изобретени - повышение надежности работы контактного устройства.The purpose of the invention is to increase the reliability of the contact device.

Поставленна цель достигаетс тем, что контактодержатели неподвижных контактов выполнены ступенчатыми, а каждый из неподвижных контактов выполнен в виде двух накладок, расположенных на ступен х контактодержател .This goal is achieved by the fact that the contact holders of the fixed contacts are made stepwise, and each of the fixed contacts is made in the form of two plates, located on the steps of the contact holder.

На фиг. 1 показано контактное устройство , вид спереди с разрезом; на фиг. 2 - то же, вид сверху.FIG. 1 shows a contact device, front view with a slit; in fig. 2 - the same, top view.

Claims

The contact device contains a contact bridge 1 with contacts 2, 3 and limiting protrusions 4, 5, mounted in the slot 6 of the movable cross member 7 and pressed by the contact spring 8 located between the protrusion 9 in the upper wall of the slot 6 and the protrusion 10 in the middle of the contact bridge 1 to any of two slopes (for example, to the left) of the bottom wall 11 of the slot 6, and fixed contacts 12 and 13, each of which has two contact pads 14, 15 and 16, 17, respectively, mounted on the stepped contact holders 18 and 19. In the initial state NII Traverse and 7 is raised, the contact bridge 1, pressed by the contact spring 8 to the left slope of the bottom wall 11 of the slot 6 and rests with its right limiting projections 5 into the body of the yoke 7, is shifted to the left relative to the axis of the yoke 7 and tilted in such a way that its left contact 2, below the right contact 3, is located above the contact pad 15 of the fixed contact 12. When the device is triggered, first the yoke 7 moves in the opposite position with the contact bridge 1: Then the left contact 2 of the bridge 1 contacts the contact pad 15 and ascends • slide along it to the left under the action of the contact spring 8. However, the stepped contact holder prevents this movement from the contact bridge. 1 begins to rotate clockwise around its contact 2, which causes the middle of the protrusion 10 to move to the right relative to the interface between the left and right slopes of the bottom wall and slot 6. In this case, the contact spring 8 tends to press the bridge 1 already to the right slope of the bottom wall 11, accelerated the contact of contact 3 with the contact pad 17 of the fixed contact -13. In this case, in the case of very slow movement of the yoke 7 downwards, the contact 2 may, under the action of the spring 8, briefly detach from the contact pad 15 and contact it again after contact 3 contacts the fixed contact strip 17 of the fixed contact 13. However, when the yoke 7 is moving downwards rapidly , which is typical of real contact closure modes, contact 3 is in contact with the contact pad 17 without breaking contact 2 from the contact pad 15. Thus, the contact bridge 1 bridges contact pads 15 and 17 IG Petritskaya contacts 12 and 13. The movement dalneyschih crosspiece 7 to its lowest position results in complete failure of the selection contacts. When the contacts of the traverse 7 are opened, the traverse 7 moves upwards and the bottom wall 11 of the slot 6 approaches from below to the contact bridge 1; wherein the middle of the protrusion 10 is already shifted to the right relative to the interface between the left and right slopes of the wall 11. Therefore, the bridge 1, pushed upwards by the wall 11 of the slot 6, first rotates clockwise around its right contact 3, as a result of which the contact 2 is detached from the contact lining 15 As the crosshead 7 continues to rise, the bridge 1 slides to the right under the action of the contact spring, resting on the interface between the slopes of the bottom wall 11 of the slot 6 and the contact pad 17 until the left limiting protrusion 4 bridges 1 with hull 7. As a result of the continued lifting of the cross beam 7, contact 3 comes off contact pad 17 and bridge 1 is finally pressed against the right side wall of the lower wall I. Bridge 1 turns out to be inclined so that its right contact 3 below the left contact 2 is located above the contact pad 16 of the fixed contact 13. This mutual arrangement of the elements of the contact device is maintained until the next actuation, in which everything described for the contact closing process is repeated, but the first contact is the right contact 3 of the bridge 1 with the contact pad 16 of the fixed contact 13. The forced setting of the direction of the preliminary tilt of the contact bridge is carried out strictly alternately, regardless of the state of the surfaces and the wear of the contacts. Claims of the invention A contact device comprising a movable yoke with a slot having a gable lower wall, a spring-loaded contact bridge placed in this slot, and fixed contacts fixed on conductive contact holders, characterized in that, in order to increase the reliability of its operation, contact holders contacts are made stepwise, and each of the fixed contacts is made in the form of two plates, located on the steps of the contact-drop. Sources of information taken into account during the examination 1. USSR author's certificate No. 260706, cl. BUT N 1/20, 1969.

2. Pathet of Japan No. 49-26770, 59 A 11, 1970.

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