SU907606A2 - Contactor - Google Patents

Description

(54) CONTACTOR

one

The invention relates to electrical engineering and is used, in particular, in a group electropneumatic contactor for diesel locomotives.

According to the main author. St. No. 796935 is a pneumatically actuated contactor comprising a fixed part, a movable part spring-loaded with a return spring and associated with a contact system, and a clamp. This contactor is equipped with a rocker, tandem load and lock. In this case, the retainer is made in the form of a cam fixed on the axis and a spring-loaded roller, one end of the rocker arm is connected with the moving part of the drive, and the other end is connected with the cam retainer, and the flying weight is fixedly rotatable on the cam axis and rigidly connected with the cam at the junction point of the cam with the beam 1.

When implementing known contacts in some designs, it is not possible to locate the rocker and the anchor weight with a lever without significantly increasing the size of the contactor. In addition, one-way mobile connection

parts of a contactor with a lock and a load cause it to skew, which adversely affects the movement of this part and the degree of wear of the parts of the contactor that direct this movement.

The purpose of the invention is to increase reliability and reduce dimensions.

The goal is achieved by the fact that in the contactor the axis of the locking cam is aligned with the axis of rotation of the rocker arm.

Moreover, the contactor is equipped with another identical mechanism in the form of a rocker arm, a swing weight, a retainer made in the form of a cam mounted on an axis, and a spring-loaded roller, in which one end of the rocker arm is connected to the movable part of the drive and the other the load is fixed to rotate on the cam axis and is rigidly connected to the cam at the point where the cam is connected to the rocker, and the cam axis of the lock is aligned with the axis of rotation of the rocker arm, while the identical mechanisms are located symmetrically tnositelno movable part.

In addition, one end of the rocker supports the movable part.

FIG. 1 shows the contactor in the off position, general view; in fig. 2 - the same, in the on position; in fig. 3 - another version of the contactor in the open position, when one end of the rocker arm supports the movable cylinder; in fig. 4 - the same, in the on position.

The contactor contains a fixed piston 1 on which a movable cylinder 2 is dressed. On the cylinder 2 there are movable contacts (not shown). The contactor contains a rocker 3, mounted on the axis 4 with the possibility of rotation. At one end of the rocker arm 3 is fixed an anchor weight 5, and the other end is pivotally connected to the movable cylinder 2. The cam of the retainer 6 is rigidly connected to the rocker 3 and its axis coincides with the axis 4. The cam of the retainer 6 is pressed by the spring-loaded pusher 7.

The contactor works as follows.

When compressed air is supplied to the working cavity between the piston 1 and the movable cylinder 2, the latter moves (switching process). At the same time, the rocker arm 3, which is hingedly connected with the movable cylinder 2, rotates around axis 4 together with an anchor weight 5 and a cam of the retainer 6.

By appropriately choosing the weight of the token weight 5, the ratio of the arms of the rocker arms 3, the cam profile of the retainer 6, and the pressing force of its spring-loaded pusher 7 form the necessary counteracting characteristic (PX) of the contactor that would more closely match the traction characteristic (TX) of the pneumatic actuator.

The proposed contactor contains less parts, is simpler in design and more compact.

To eliminate asymmetric loads on the cylinder 2, as well as for even greater compactness of the apparatus, the matching device (the token weight 5, the rocker arm 3, the latch cam 6, etc.) is made of two identical and symmetrically located about the axis of the cylinder 2

devices with equivalent total coordinating action.

For some types of contactors it is not possible to position the matching device above the drive (as shown in Figs. 1 and 2). In these cases, the contactor is made even simpler: the yoke 3 (see Fig. 3 and 4) directly supports the movable cylinder 2. To reduce the frictional forces at this end of the rocker arm, it is advisable to install the roller.

The contactor (see Fig. 3 and 4) works in the same way as the contactor described above (see Fig. 1 and 2). The only difference is that when turned on, the rocker arm 3 rotates around the axis 4 together with the cam of the latch 6 here under the action of the force of the weight of the drop weight 5 as the movable cylinder 2 moves under the action of compressed air.

Claims (3)

Invention Formula . The main contactor aut. St. No. 796935, characterized in that in order to reduce ha-barites and increase reliability, the cam shaft axis is aligned with the axis of rotation of the rocker arm. 2. The contactor according to claim 1, characterized in that it is provided with another identical mechanism in the form of a rocker arm, a swing weight, a clamp, made in the form of a cam fixed on an axis, and a spring-loaded roller, in which one end of the rocker arm is connected to the movable part the drive and the other with the locking cam, the anteroom weight is fixedly rotatable on the cam axis and rigidly connected to the cam at the junction point of the cam with the rocker arm, and the cam axis of the locking pin is aligned with the axis of rotation of the rocker arm, while the aforementioned identical mechanisms placed symmetrically relative to the movable part. 3.Contactor on PP. 1 or 2, characterized in that one end of the yoke supports the movable part. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2731071, cl. H 01H 3/24, 1979. Figg. one