SU979916A1 - Device for measuring axial force - Google Patents

Description

(54) DEVICE FOR MEASUREMENT

The invention contributes to load measuring technology and can be used to measure the force applied to the friction linings of a vehicle clutch.

A device for measuring axial forces is known, comprising an elastic coupling with two flanges, fastened with bolts and rigidly connected hubs to the ends of the shaft, and strain gauges included in measuring circuit Cl.

The disadvantage of the device is the impossibility of its use in testing clutches of vehicles.

The closest to the invention to the technical essence is a device comprising a housing mounted on an engine crankshaft, a driving disk interacting with the housing through pins having axially located fingers at the ends connected to the free ends of beams of equal resistance fastened to the housing, pressure disk connected to the housing by means of a casing attached to it, a slave disk located between the drive and pressure disks and connected to the primary POWER

the gearbox shaft, a spring device located between the pressure plate and the casing, sensors, deformations, fixed on beams of equal resistance and connected by wires to the current collector device 2.

The main drawback of the device is that the axial dimensions are considerable in size, which allows its installation in the clutch housing of a production car and requires a change in the design of the crankcase itself, the Lenin coupling 5 unlocking drive, the gearbox mounting unit and the drive shaft. Changing the range of design parameters of the car causes an undesirable redistribution of loads arising in the transmission.

The increase in the axial dimensions of the device is due to the presence of a diaphragm Nbi, which serves to transmit torsional

25 points from the engine to the drive plate, and the presence of its fastening elements to the case and the drive disk, as well as the location of the equal resistance beams between the case and the drive unit

30 liske.

The aim of the invention is to simplify the device by expanding the functional capabilities of its individual elements.

This goal is achieved by the fact that in a device for measuring axial force, comprising a housing mounted on a crankshaft, a driving disk, interacts with the housing through pins having fingers on the ends connected to the free ends of the beams of equal resistance, bonded to the housing, a pressure disk connected to the housing by means of a casing fixed on it, a driven disk located between the drive and pressure disks and connected to the primary valve 1, Rc box, spring device)

located between the pressure disk and the casing, strain gauges, reinforced on beams of equal resistance, one finger of each pin is rigidly connected with the driving disk, and the other one is made with diametrically opposite projections in contact with the free end of the beam of equal resistance, and the beams are located 1 outside the body from the side of the crankshaft, and pins passed through holes made in the housing.

Figure 1 shows a device in sectional view; FIG. 2 is view A in FIG. 1, (partial); on fig.Z -,

The device (Fig. 1) comprises a housing 1, bolted 2 on cranked Bajjy 3 engine 4. A driving disk 5 is connected to housing 1 via pins b and beams 7 of equal flexural resistance, fixed to the housing by bolts 8.

At this, each pin contacts one of the ends 9 with the plane 10 of the master disk 5 and is connected to it by means of a finger 11 located in the hole 12. At the opposite end of the pin 13 are diametrically opposed-protrusions 14, which when installed are

on a circle whose center coincides with the axis of the device. The protrusions 14 are in contact with the plane 15 of beams of different resistance, providing a constant shoulder for applying bending forces from axial forces (Figs. 2 and 3). In order to realize the transfer to the moment of rotation, a pin 16 is made through the pin 17 beam 7 of equal resistance and part of the lateral surface in contact with it

To eliminate the formation of a gap between the plane 15 of the beam 7 of equal resistance and the protrusions-14 of the pin in the ring 16, an opening 18 is made, i into which a pin 19 is inserted;

clocking plane 20 of equal resistance and clamping drive disk 5 with pins 6 to it.

As an option for reducing the axial dimensions, the beams and the drive disc are located on opposite sides of the housing, for which holes 21 are made in the housing for the passage of pins. In this case, the beams are located in the free space between the engine 4 and the housing 1, and the whole device is made more compact.

At the same time, in order to simplify and increase the accuracy of the beam. 7 equal resistances can be made as one piece on ring 22. On housing 1, a clutch cover 24 connected to a pressure disk 25, which can be moved, is bolted 23. The slave disk 26 is located between the drive and pressure disks and can freely move along the splines of the input shaft 27 of the gearbox. The spring device 28 is located between the outer disk and the casing.

Sensors 29 are installed on the beams of equal resistance; I perceive only axial force. The sensors 29 are connected by wires with a connector 30 mounted on a cast ring 31, from which a conduit 32 is drilled 33 in the crankshaft 3 to the totem, mounted on the toe of the crankshaft. la engine

The device works as follows.

When the clutch is engaged, the pressure disk 25, moving in the axial direction, under the action of the spring 28 presses the clutch driven disk 26 to the drive disk 5,

When the engine 4 is running, a torque arises on the driven disk 26, part of which is transmitted from. the crankshaft 3 of the engine and the casing 1 connected to it via a driving disk 5 rigidly connected in a tangential direction with the casing 24 mounted on the casing 1.

The other part of the torque is transmitted through the driving disk 5, rigidly connected to the housing 1 in the tangential direction by means of beams 7 of equal resistance and pins 6 passing through the holes in the beams and fixed on the driving disk.

The force applied by the clutch on the leading disk 5 is transmitted from the pins 6 with the protrusions 14 specially made on them onto the beams 7 of equal resistance fixed to the flywheel housing. Thus, when the clutch of the beam is equal to the load resistance of the torque and axial force equal to the force pressed by the spring. However, due to the considerable stiffness of the beams in the tangential direction of the deformation of the sensors pasted on the beams, the torque caused is much less than the deformation caused by the axial force. In addition, the sensors are interconnected in such a way that the galvanometer included in the measuring diagonal responds only to a change in the axial force.

The positive effect of using the proposed device is that it can be used to measure the real loads that occur in a car's transmission / directly under road conditions. The device makes it possible to investigate the statistical regularities of the force interaction of the friction elements of the clutch-clutch directly in operation, which in practice will be expressed in a more correct selection of friction pairs in order to reduce their temperature and wear.

Claims (2)

Invention Formula A device for measuring axial force, comprising a housing mounted on a crankshaft, a driving disk interacting with the housing through pins, axially located fingers on the ends, connected to the boom ends of the equal resistance, fastened to the housing, a pressure disk connected with the case by means of a casing fixed on it, a driven disc, located between the intermediate and pressure discs  and associated with the gearbox primary shaft, a spring device located between the pressure disk and the casing, deformation sensors mounted on beams of equal resistivity, characterized in that, in order to simplify the device by expanding the functionality of its individual element, one finger of each pin tough 0 is connected to the master drive and another made with diametrically opposite protrusions in contact with the free end of a beam of equal resistance, the beams are located outside the case from the side of the crankshaft, and the pins are passed through holes made in the case. Sources of information taken into account in the examination About 1 USSR Author's Certificate No. 209809, cl. G 01 L 5/12, 1965. 2. USSR author's certificate No. 455252, cl. G 01 L 1/22, 1973 (prototype).