RU3037U1 - DYNAMOMETER - Google Patents

Abstract

A dynamometer comprising a housing, an elastic element in the form of a ring, a mechanical meter of its deformation and tips for transmitting the measured force to an elastic element, characterized in that the housing is made in the form of a tube, an elastic element and a strain gauge are fixed at opposite ends of the housing and connected by a pusher located along the axis inside the tube, the elastic element is equipped with a strain limiter in the form of a rod mounted inside the ring along the axis of action of the measured force with a gap between its end and located inside to rings with the end face of the tip, the tips are interchangeable of different lengths and placed along the diameter of the elastic element perpendicular to the body, in addition, a fastening means on the rail in the form of an elastic bracket pivotally connected to the body with the possibility of their mutual movement with subsequent fixation is additionally introduced.

Description

The utility model relates to the field of force measurements and is mainly used in the commissioning and maintenance of railroad switches, namely to measure the closing force of the moving elements of railroad switches.

A known dynamometer (A. St. USSR No. 1368668, MKI G 01 L 1/04, B. I. No. 3, 1988) containing an annular elastic element with diametrically located power-leading elements and a mechanical meter of its deformation located inside the annular elastic element.

The disadvantages of this dynamometer are:

- the inconvenience of the location of the meter, the scale of which can be observed only when viewed along the axis of the ring;

the relatively large dimensions of the annular elastic element, determined by the meter (indicator) located inside the ring, which makes it impossible to place the dynamometer in the closing zone of the turnout switch.

DYNAMOMETER

MKI G 01 L 1/04

A device for measuring forces is known (A.S. USSR No. 555298, MKI G 01 L 1/04, B.I. No. 15, 1977) containing an elastic element in the form of a ring and fixed on it the main and additional mechatrons, the output signal of which proportional to the load applied to the diametrically located points of the ring.

The disadvantages of this device are the fragility and the need to use a power source, as well as the comparative complexity of the circuit for converting the signal into a convenient form for counting the load.

A known dynamometer (A.St. USSR No. 1163166, MKI G 01 L 1/04, B.I. No. 23, 1985) comprising a housing, an elastic element and an indicator, the elastic element being made in the form of a sleeve placed in the housing between the stop and a pusher, and the indicator is mounted on the housing, and its measuring rod passes through the hole in the middle of the pusher sleeve. The indicator is used to measure the movement of the pusher, which is proportional to the force applied to it.

This dynamometer is closest to the claimed utility model and is selected for the prototype.

It has the following disadvantages:

-the indicator is placed on the axis of action of the measured force, which does not allow it to be placed between contacting surfaces;

- the reporting device, like the dynamometers discussed above, is located in an uncomfortable zone, invisible when measuring the closing force of the turnout elements;

The purpose of creating a utility model is to improve operational characteristics by achieving the possibility of placing an annular elastic element between adjoining surfaces, moving its strain gauge into a convenient zone for observation while protecting the dynamometer from overload, and the worker from injury by interlocking turnouts.

This goal is achieved by the fact that in the dynamometer containing the housing, an elastic element in the form of a ring, a mechanical meter of its deformation, tips for transmitting the measured force to the elastic element, the housing is made in the form of a tube, and the elastic element and the strain gauge are fixed at opposite ends of the housing and connected by a pusher located axially inside the tube. The elastic element is equipped with a deformation limiter in the form of a rod mounted inside the ring along the axis of the measured force with a gap between its end and the tip end located inside the ring. The tips are interchangeable of various lengths and placed along the diameter of the elastic element perpendicular to the body. In addition, an additional means of fastening to the rail is introduced in the form of an elastic bracket pivotally connected to the housing with the possibility of their mutual movement with subsequent fixation.

The possibility of placing an annular elastic element between the interlocking surfaces of the turnout is achieved by installing the tips along the diameter of the ring perpendicular to the housing, as well as making the tips interchangeable of different lengths. The removal of the strain gauge in a zone convenient for observation is achieved by making the housing in the form of a tube, at the opposite ends of which an elastic element and a strain gauge are fixed.

as well as the implementation of the latter in the form of a lever-gear multiplier. The dynamometer is protected from refusal by supplying the elastic element with a deformation attendant in the form of a rod mounted inside the ring along the axis of the force with a gap between its end and the tip end located inside the ring. The additional introduction of rail mounting means made in the form of an elastic bracket pivotally connected to the housing with the possibility of mutual movement with subsequent fixation, allows to protect the worker from injury by the interlocking switches.

The device is illustrated by the following drawings.

In FIG. 1 shows a dynamometer device.

In Fig. 2 is a view along arrow A of Fig. 1.

In FIG. Figure 3 shows the installation of a dynamometer for measuring the translation force of a switch wag.

In FIG. 4 - installation of a dynamometer for measuring the translational force of the turnout core.

The dynamometer contains an elastic element 1 in the form of a ring, to which the tips 2 and 3 are attached to transmit the measured force, the housing 4, the pusher 5 and the limiter 6. The limiter 6 is made in the form of a rod mounted inside the ring 1 along the axis of the measured force, and between the end face of the limiter 6 and the end face of the tip 3 located inside the ring 1, there is a gap a, slightly exceeding the working range of the ring deformation during measurement. The housing 4 is made in the form of a tube. A deformation meter, made in the form of a lever-gear multiplier, including a base 7, on which a deformation elastic element 1 ends, is attached to the end of the housing 4;

a lever 8 is mounted on axis 9 and an indicator mechanism 10. As the latter, for example, a mechanism according to GOST 1883373 can be applied. An arrow 11 is installed on the output axis of the mechanism 10 (Fig. 2), and a scale 12 is located under the arrow 7. the element 1 and the strain gauge are connected by a pusher 5 located axially inside the housing 4. The housing 4 with the elastic element 1 and the strain gauge is suspended on a hinge 13 mounted on the elastic bracket 14 (Fig. 3). The hinge 13 is located, for example, in the slot 15 of the bracket 14 with the possibility of fixing with a screw 16. The tip 3 is made interchangeable (Fig. 4) to enable the measurement of forces both on the arrows and on the cross of the rail track.

The dynamometer operates as follows.

The housing of the dynamometer 4 with an elastic element 1 and a strain gauge using an elastic bracket 14 is mounted on the rail head (Fig. 3 and 4). In this case, depending on whether the measurement is performed on the turnout switch (Fig. 3) or on the cross (Fig. 4), the tip 3 is selected long or short. After installation, the tip 3 is pressed against the side surface of the rail due to gravity, overturning the dynamometer around the axis of the hinge 13 until the contact of the tip with the rail.

To measure the force, the switch is activated, as a result of which the wit 17 (Fig. 3) or the core 18 (Fig. 4) come into contact with the tip 2. Since these elements of the switch have a significant mass, at the moment they come into contact with tip 2 due to the forces of inertia, the dynamometer is overfocused, and its annular elastic element 1 is deformed, choosing a gap a between the end face of the tip 3 and the end face of the limiter 6, which perceives the dynamic forfusion.

After the elements of the turnout switch achieve static equilibrium on the tips, the force continues to act, developed by the translation drive, which is to be measured. This force causes the deformation of the annular elastic element 1, proportional to its value. The ring takes an elliptical shape, shrinking along the line of action of the force and expanding in the perpendicular direction, which causes the displacement of the pusher 5, the rotation of the lever 8 on the axis 9 and the transfer of movement to the mechanism 10, the arrow 11 of which is displaced on a scale of 12. The magnitude of this displacement is proportional to the deformation rings and, therefore, the magnitude of the measured force.

When installing a dynamometer on rails of various sizes, the hinge 13 is displaced along the slot 15 with subsequent fixation with screw 16. This allows you to place the tips in the zone of the neutral axis of rails of various sizes and with varying degrees of wear.

The placement of the annular elastic element 1 and the strain gauge at the opposite ends of the housing 4, as well as the presence of the lever 8 allows you to make the scale 12 of the dynamometer in a zone convenient for observation from the outside of the track. Mounting the housing 4 on the rail head using an elastic bracket 14 allows the worker to install the device also on the outside of the rail, without lowering his hands below the rail. Both of these circumstances make it possible to ensure the safety and convenience of installing the dynamometer, observing its readings and removing the dynamometer after the measurement.

A prototype of the inventive design of the dynamometer is designed and manufactured by MICROMEH LLP.

Claims (1)

A dynamometer comprising a housing, an elastic element in the form of a ring, a mechanical meter of its deformation and tips for transmitting the measured force to an elastic element, characterized in that the housing is made in the form of a tube, an elastic element and a strain gauge are fixed at opposite ends of the housing and connected by a pusher located along the axis inside the tube, the elastic element is equipped with a strain limiter in the form of a rod mounted inside the ring along the axis of action of the measured force with a gap between its end and located inside to rings with the end face of the tip, the tips are interchangeable of different lengths and placed along the diameter of the elastic element perpendicular to the body, in addition, additional means of fastening to the rail in the form of an elastic bracket pivotally connected to the body with the possibility of their mutual movement with subsequent fixation are introduced.