CS238550B1 - Semi-pantograph current collector with pneumatic drive - Google Patents

Abstract

A semi-pantograph current collector with a pneumatic drive mechanism with favorable characteristics of the lifting force of the collector, the essence of which lies in the fact that the holders (1), firmly attached to the supporting frame (2), contain bearings (3) of the main shaft (4), firmly connected to the lower end of the lower arm (5). In the upper end of the lower arm (5), a supporting shaft (6) is rotatably mounted, firmly connected to the couplings (7), which pass between the stops (8) on the hubs of the upper arms (9) rotatably mounted on the supporting shaft (6). The couplings (7) are articulated with the upper guides (10) and articulated with the lower guides (11). The upper guides (10) are articulated with the carriers (12) of the slide (13) and the lower guides (11) are articulated in the joint (14) on the supporting frame (2). It is advantageous that a lever (15) is mounted on the main shaft (4) and is articulated with the piston rod (16) and the rod (19) is articulated with an anchorage (20) that exceeds the lowest anchorage position of the piston rod (16) on the lever (15).

Description

BACKGROUND OF THE INVENTION The present invention relates to a semi-pantograph current collector with a pneumatic drive device having favorable collector lifting characteristics.

During operation of the existing pantographs, the contact force of the slide on the catenary changes as a result of the varying height of the catenary and the change in the arms of the drive train. For this reason, the pantographs are provided with non-round discs, Gall chains, set screws and the like to adjust the arms of the driving forces.

The above-mentioned disadvantages are partially eliminated by a semi-pantograph current collector with a pneumatic drive device having a favorable pick-up force characteristic of the collector according to the invention, which consists in holding the main shaft bearings firmly attached to the lower end of the lower arm. In the upper end of the lower arm, a support shaft is rotatably mounted, which is rigidly connected to the couplings that extend between the stops on the hubs of the upper arms rotatably mounted on the support shaft. The couplings are articulated to the upper guides and articulated to the lower guides. The upper guides are articulated to the slide carriers and the lower guides are articulated in a hinge to the support frame. It is preferred that a lever is mounted on the main shaft which is articulated to the piston rod and the rod is articulated to an anchorage that exceeds the lowest position of the anchorage of the piston rod on the lever.

An advantage of the device according to the invention is that the pneumatic actuator arm and the pantograph arm vary within the pantograph stroke range according to the cos angle of inclination from the horizontal position, so that the pantograph lifting force is favorable because the power unit is constant

238 550 Constant pantograph downforce. The simple design, low material consumption and low weight of the pantograph, as well as low compressed air consumption to drive the pantograph and the forced withdrawal of the pantograph to the lower, rest position are its other advantages.

The semi-pantograph of a pneumatic powered device according to the invention is schematically shown in the drawings, wherein FIG. 1 is a side view of the arrangement of the semi-pantograph and FIG. 2 is a schematic representation of the top view of the pantograph.

In Fig. 1, the bearings 3 of the main shaft 4, fixedly connected to the lower end of the lower arm 5, are supported in the holders 1 fixedly fixed to the support frame 2. In the upper end of the lower arm 5, the support shaft 6 is rotatably mounted. 7 which extend between the stops 8 on the hubs of the upper arms 9 rotatably mounted on the support shaft 6. The couplings 7 are articulated to the upper guides 10 and articulated to the lower guides 11. The upper guides 10 are articulated to the carriers 12 of the slide 13 and the lower guides 11 are articulated in a joint 14 on the support frame 2. A lever 15 fixed to the main shaft 4 is articulated to the piston rod 16 and the rod 19 is articulated to an anchor 20 which exceeds the lowest position of anchoring the piston rod 16 on the lever 15.

When the pick-up is at the lower limit of the working stroke, the lever 15 is in the vertical position. In the lower, rest position of the pantograph, the articulated connection of the lever 15 to the piston rod 16 is to the right of a vertical plane passing through the axis of the main shaft 4. This distance causes the slide 13 to be moved away from the lower position of the contact.

The lower arm 5 forms a right angle with the lever 15. The lever 15 is articulated and the piston rod 16. The piston 17 is connected to the piston rod 16. The articulated connection of the piston rod 16 to the lever 15 pivots to the left when the pantograph is raised. From the lower limit of the working stroke of the pantograph to its upper limit, the position of the articulated connection of the piston rod 16 to the lever 15 increases. In the middle of this elevation, the articulated anchorage 20 of the linkage 19 is located on the support frame 8 so that in the half of the pantograph stroke the axis of the pneumatic drive mechanism is horizontal and the deflection of this axis from the horizontal position is symmetrical during the stroke. troleji. Conveniently

238 550

3, an increased distance of the anchorage 20 from the main shaft 4 is also apparent.

The pneumatic powertrain is filled with compressed air, the pressure of which is controlled by the automatic pressure stabilizer. As the contact height decreases, the air pressure in the cylinder 18 reduces the pressure relief valve. By introducing compressed air into the pressure chamber 21 of the cylinder 18, the header is raised to the upper limit of the working stroke. By introducing compressed air into the return space 22 of the cylinder 18, the pantograph is forced into the lower, rest position.

In Fig. 2, the upper arm 9, the upper guide 10, the slide carrier 12, the clutch 7, the lower guide 11, the lever 19 and the entire pneumatic drive 26 of the pantograph and the anchor 20 of the tie rod 19 are duplicated on the polopanto graph; none of these components extends below the lower line of the support frame 2. The support frame 2 rests on three support insulators 23 «.

The arrangement of the polopantograph according to the invention achieves the smallest height of the pantograph in its lower, rest position, thereby allowing the housing of the vehicle to be increased over its entire length, which is advantageous for the comprehensive electrical equipment of the vehicle.

Claims (2)

Polopantograph current collector with pneumatic drive ²³⁸ 550, characterized in that in the holders (1) fixedly attached to the support frame (2) bearings (3) of the main shaft (4) »are fixedly connected to the lower end of the lower arm (1). 5), wherein in the upper end of the lower arm (5) there is rotatably mounted a support shaft (6) fixedly connected to the couplings (7) which pass between the stops (8) on the hubs of the upper arms (9) rotatably mounted on the support shaft (6) ), wherein the couplings (7) are articulated to the upper guides (10) and articulated to the lower guides (11) and the upper guides (10) are articulated to the carriers (12) of the slide (13) and the lower lower guides (11). they are articulated in a hinge (14) on the support frame (2). The semi-pantograph according to claim 1, characterized in that the lever (15) fixed to the main shaft (4) is articulated to the piston rod (16) and the rod (19) is articulated to the anchorage (20) which exceeds the lowest position of anchoring of the piston rod (16) on the lever (15).