RU2453447C1 - Method of fabricating transport facility pantograph bar - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: proposed method comprises making sleeve for securing bar on transport facility, for example, trolleybus and mount for pantograph and case from composite material including axial layers of reinforcing material. Said layers are smoothly bent upward relative to sleeve lengthwise axis.

EFFECT: reliable operation, increased safety.

4 dwg

Description

The invention relates to electric vehicles and can be used for electric vehicles for various purposes, in particular in the current collector of a trolley bus.

A four-step trolleybus current collector rod made of alloy steel is known. The bar has a preliminary bend up, which ensures the passage of trolleybuses under artificial structures, where the height of the suspension of the contact wire is reduced.

However, the significant mass of such a rod and its rigidity lead to large fluctuations in the force of contact pressing the wire when the level of its suspension changes, which causes insufficient stability of the current collector on the contact network, increases the wear of the coal insert and the contact wire, and causes intense sparks in areas with a slope of the wire up traffic and therefore does not ensure the reliability of the transport. In addition, the rod requires reliable electrical insulation of at least three successive stages.

Also known is the trolleybus current collector rod, made in the form of a fiberglass pipe and equipped with a flexible coupler, eccentrically placed inside the pipe and ensuring its bending.

This design does not allow to compensate for the deflection of the vehicle rod with changes in the height of the contact wire relative to the road surface, which also reduces the reliability of the rod.

There is also a known method of manufacturing a rod adopted by the authors for the prototype (Patent of the Russian Federation No. 2026796, class B60 5/12, 1991), in which the rod of the vehicle’s current collector is a hollow rod made of concentric layers impregnated with a polymer binder reinforcing fibers material located both along the helix and along the rod.

Such a design, due to the lack of upward bending of the rod, does not provide reliable contact between the current collector head of the current collector and the contact wire when its height changes, especially when passing through the network in areas with the lowest level of suspension of the contact wire.

An object of the present invention is to eliminate these drawbacks and, as a result, increase electrical safety and fire safety of trolleybus vehicles.

We offer a rod containing a sleeve for attaching the rod to a vehicle, a device for installing a collector head and a housing made of composite material made in the form of a hollow rod of variable cross section with a constant thickness, consisting of concentric layers impregnated with a polymer binder of fibers of a reinforcing material located both along , and along helical lines, characterized in that the axial layers of the housing are smoothly curved upward relative to the longitudinal axis of the sleeve.

Giving the body a preliminary bend allows you to compensate for the deflection of the rod created by the force of pressing the collector head of the current collector on the contact wire, which significantly increases the reliability of current transmission during operation in any conditions and ensures stable contact with the contact wire.

Figure 1 presents the bar, a General view; figure 2 shows a cross section aa; figure 3 is a longitudinal section bB of the base of the rod; figure 4 is a longitudinal section bb of the top of the rod.

The rod includes a housing 1, a sleeve 2 for mounting the rod on the vehicle and a device 3 for installing a collector head.

The housing 1 of the rod is a hollow curved rod, the longitudinal axis 6 of which has the form of an elastic line. The housing is made of upwardly curved concentric layers 4, 5 impregnated with a binder of fibers of a reinforcing material. Layers 4 are located along helical lines and, depending on the laying angle, they perceive both bending loads and torque loads. Layers 5 are located along the housing 1 and perceive bending loads. It is possible to lay reinforcing material only along helical lines at a slight angle to the horizontal axis.

Glass, organo and other fibers can be used, and binders, for example, based on epoxy and polyester resins, can be used as a polymer matrix.

Laying of layers can be carried out by the method of broaching, winding, laying and other methods used in the manufacture of products from polymer composite materials. At the same time, the magnitude of the deflection of the rod body depends on the operating conditions, the type of vehicle on which it is installed, the nature of the contact network, etc., and is ensured by the manufacturing process of the case.

To ensure the reliability of the current collector rod, it is necessary that its deflection can compensate for the deflection that occurs due to pressing the current collector head on the contact wire.

The manufacture of a curved body of the rod can be carried out, for example, in the following way. Several layers of reinforced material impregnated with a binder are laid on the mandrel until the design thickness of the housing is reached. Then, preliminary heat treatment of the housing blank is performed, after which the mandrel is removed from the housing blank. Next, the workpiece is bent in accordance with the profile and in this state is finally cured.

The bar works as follows. Housing 1 is mounted on a vehicle using a sleeve 2. On the device 3 rods mounted collector head. The case with the collector head is spring-loaded to the contact wire. The current from the contact wire through a current lead (not shown) located in the central hole of the housing 1 is transmitted to the vehicle’s traction motor, while moving in areas with a reduced level of suspension of the contact wire from the surface of the road surface, the force of pressing the collector head of the current collector onto the wire increases and the rod bends decreases, which compensates for the deflection of the rod.

The proposed rod design made of polymer composite material ensures reliable operation of the vehicle’s current collector, eliminates accidents due to loss of contact between the head and the wire or due to mechanical destruction of the rod even when the contact network passes in areas with the lowest level of suspension of the contact wire, increases the electrical safety of trolleybuses, ensures reduction of line failures and the cost of operating machines and a contact network.

Claims (1)

A method of manufacturing a rod of a current collector of a vehicle, for example, a trolley bus containing a sleeve for mounting the rod in the holder of the current collector, a device for mounting the head of the current collector and a housing in the form of a hollow rod based on a composite material consisting of concentric layers of a polymer-impregnated reinforcing material arranged as a screw lines, and along the axis of the rod, characterized in that the housing is made in the form of a hollow rod of variable cross section with constant thickness, with an axis layers bubbled gently curved upward with respect to the longitudinal axis of the insert rod holder susceptor.

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