CZ301773B6 - Device to drive disengaged or engaged rail vehicle wheel sets - Google Patents

Abstract

In the present invention, there is disclosed a device for driving a set of wheels of railway vehicles joined or not joined to the chassis, said device being especially used when machining running profiles of the wheel set wheels. The device of the present invention consists of a pair of pulleys (3) from which at least one is a driven pulley. A wheel set wheel (K) can be inserted between said pulleys (3). Each of the pulleys (3) being rotatably mounted in an independent spindle (2) is provided with a torque source (4). The spindles (2) being hinged to a carrier (5), which is coupled with a frame (1), are provided on opposite sides relative to the pulleys (3) with an extensible mechanism (6).

Description

Devices for propulsion of wheelsets of rolling stock, untied or untied

Technical field

The present invention provides a device for driving wheelsets of rail vehicles not tied or unloaded from a bogie, especially in machining their driving profiles. It consists of a pair of pulleys, at least one of which is driven and between which an insertable wheel of a wheel set is inserted. Each of the rollers is rotatably mounted in a separate spindle and provided with a source of torque.

it

BACKGROUND OF THE INVENTION

There is no problem in deriving a rotating motion when working out the unset wheelsets. It can be used when turning conventional jigs usable on lathes when turning longer objects. The wheelset can be gripped in the spikes or chuck jaws as described in CZ patent 278919. When machining unbalanced wheelsets, there is a problem how to derive the rotational movement of the wheelset whose torque would be sufficient for machining the driving profile. Therefore, it is common to use radical pulleys on which the wheelset is mounted. These radical pulleys are driven in this case. Lf of unbalanced wheelsets, the circumference of the wheel circumference is radically secured by the weight of the vehicle, which is sufficient, especially for traction vehicles. If the machined wheelset is from a tethered bogie, then it is necessary to apply a thrust from the top of the bogie to achieve the necessary adhesion between the radical pulleys and the running profiles of the wheels. If the wheelset is tied, but provided with bearing housings at the ends, it is possible to apply a thrust to the bearing housings to detect adhesion. The amount of adhesion required depends on the resistance generated by the machining process. However, due to the accompanying machining phenomena, such as lubrication and cooling, the adhesion varies. Driven by radical pulleys therefore seems inappropriate.

The solution described in CZ patent 288116 is known, consisting of a pair of pulleys, at least of which are driven, with an insertable wheel set between them. The pulleys are arranged in housings, where a thrust device is arranged between the housings and the frame. The tool holder protrudes against the driving profile. On both sides of the tool are pairs of support rollers. Each of the support rollers is mounted in a separate lifting device. Also in this solution the wheelset rests on the pulleys. Such a solution then follows the circumferential irregularities of the worn driving profile and transmits its radical irregularities to the machined driving profile.

The result of both solutions is that the circumference of the machined wheels is non-circular, and this inaccuracy is due to wheel wear before machining.

The below-level lathe described in CZ patent 288116 consists of a pair of pulleys intended to drive each of the wheelsets. At least one of the pulleys is driven. Between the rollers there is an insertable wheel of the wheelset, which is seated on the supporting rollers. The housing of one of the pulleys is fixed. A pressure device is arranged between the boxes of the other pulleys and the frame. The tool holder protrudes under the rollers against the driving profile. There are two pairs of support rollers on the sides of the pulley boxes. Each of the support rollers is mounted in a separate lifting device, which guarantees a fixed position of the wheelset axis during machining. In such a device, the driving profiles of wheelsets of wheelsets and low-floor vehicles can be worked even if the wheels are located inside the frame and the fronts are fitted with bearing houses without the condition of removing the garters or even wheelsets from the vehicle. Despite the considerable progressiveness of the concept of such a concept of the underfloor lathe, the drive with pairs of pulleys shows some undesirable force effects. A condition for trouble-free transmission of circumferential force from the pulleys to the wheelsets of the wheelset is the exact positioning of the pulley on the wheelsets. By turning the wheel of the wheelset by a pulley, the contact point of the pulley on the side of the wheel describes an imaginary circle. In order for the circumferential force of the pulley to fully affect the rotation of the wheelset, the contact point of the pulley with the side of the wheel must be at the point of contact of the imaginary circle with the tangent lying in a plane passing through the circumference

Pulleys. This is rarely the case for several reasons. Due to the different position of the contact point of the pulley with the wheel side of the wheel set from the tangent point, the driving force of the pulley does not only act on its drive, but forces are dissipated. The resultant force distribution creates a component lying in a free radical from the wheel axis to the contact point of the pulley with the wheel side. Depending on the sense of the force vector, the wheelset either carries out the support rollers or overloads the support rollers. If the axle were stored in the spikes, then such a bearing would be excessively stressed. One of the reasons is the manufacturing inaccuracy, which also adds wear caused by wear. Another reason is the incorrect geometry of the chassis and the contact of the wheel profile with the support rollers. The driving profile does not always have a ring geometry, since it is unevenly worn from contact with the rail head, both on appeal and from braking. Therefore, due to different wear, it exhibits geometric inaccuracies and its circumference is not circular. All these influences create a deviation of the contact point of the pulley with the side of the wheel, which is not definable and cannot be corrected in any way.

The essence of the solution

The device according to the invention solves the drive of a wheelset of rail vehicles not tied or unloaded from a chassis, which is especially intended for machining their driving profiles. It consists of a pair of pulleys of which at least acts driven and between which is an insertable wheel set. Each of the rollers is rotatably mounted in a separate spindle and provided with a source of torque. The spindles are articulated to a carrier connected to the frame. The spindles have an extensible extension device on opposite sides to the rollers. The rollers follow the lateral deviations of the rotating wheelset due to the articulation to the carrier which allows tilting.

In one solution, the expander is a hydraulic cylinder and in another embodiment a screw connection.

For correct positioning of the pulleys on the sides so that the axes of the spindles are directed towards the center of rotation of the wheelset and thus eliminate undesirable radical forces and the force from the pulleys was only tangential to the rim, the carrier is tilted against the frame. A tilting device is inserted between the carrier and the frame.

Such a device enables machining of unbalanced wheelsets of rail force effects, both lateral forces, which are compensated in the tent tilting of a pair of spindles, and radical forces effects, which are eliminated by tilting mechanism, can be set in the centers during machining. For this purpose, the ends of the wheelset axles are provided with dimples. If the bearing housings are at the ends of the axes, then the dimples at the ends of the axes are accessed by removing the bearing housing cover. In some bearing housings, the covers are already provided with centering pockets and therefore there is no need to remove the covers from the bearing housing.

Description of the drawing in the drawing

A general view of the device according to the invention, wherein the wheel to be gripped between the rollers, is shown in the accompanying drawing.

Description of an exemplary embodiment

The device according to the invention consists of a pair of pulleys 3 of which at least one pulley 3 is driven. Between the rollers 3 is an insertable wheel K of the wheelset. Each of the rollers 3 is rotatably mounted in a separate spindle 2 and provided with a torque source 4. The spindles 2 are articulated to the carrier 5 by means of pins 51. The carrier 5 is connected by a gash L. The carrier 5 is tiltable with respect to the frame 1 and a tilting device 7 is inserted between the carrier 5 and the frame 1, in this case being a worm gear.

-2 ·

The two-wheel is positioned between the machine tool spindles. Since the axles of the two-wheel axles are provided with dimples which have been used in the production of their machining, these dimples are used for clamping and the axis is also set up between the spikes with which the spindles are provided. The wheel K is then inserted between the pulleys 3. By actuating the expansion device 6, the spindles 2 are tilted around the pins 51 and the pulleys 3 approach each other, thereby gripping the wheel K. It is now necessary to tilt the pair of spindles 2 by tilting device 7 by turning. worm in worm wheel. The pair of spindles 2 is tilted so that the imaginary axis of the spindles 3 and thus of course the pulleys 3 intersects the axle of the wheelset exactly in its center. This eliminates the radical force effect on the wheelset, which would unnecessarily stress the contact between the wheelset and the spikes. The force exerted by the contact of the rollers 3 with the wheels K is only tangential. The pulleys 3 are rotated by the action of the torque sources 4. The sense of rotation of the pairs of pulleys 3 is, of course, reversed. As a source of 4 torque proved to be a hydraulic motor.

Claims (4)

PATENT CLAIMS 20 1. Apparatus for driving wheelsets of rail vehicles not or unassembled from a bogie, particularly in machining their driving profiles, consisting of a pair of pulleys (3), at least one of which is driven and between which an insertable wheel (K) of the wheelset is inserted; the pulleys (3) are rotatably mounted in a separate spindle (2) and provided with a torque source (4), characterized in that the spindles (2) are articulated to a support (5) connected to the frame (1), The spindles (2) have an expanding device (6) inserted on opposite sides of the rollers (3). The wheel set according to claim 1, characterized in that the expander (6) is formed by a hydraulic cylinder. 30 The wheel set according to claim 1, characterized in that the expansion device (6) is formed by a screw connection. The wheel set according to claim 1, characterized in that the carrier (5) is tilted relative to the frame (1) and a tilting insert is inserted between the carrier (5) and the frame (1). 35 of the device (7).