SU1151838A1 - Device for measuring components of cutting force on rotation tool tooth - Google Patents

Abstract

1. A DEVICE FOR MEASURING THE COMPONENTS OF CUTTING FORCES ON THE TOOTH ROCH OF THE TACIAL ORGAN, containing a disk with working teeth, at least one of which is made in the form of a torque wrench, connected to three strain gauge beams fixed to one end on the disk, and the other two ends Tensometric beams are provided with support tips, which are pressed against the radially oriented faces of the dynamometric insert, characterized in that, in order to increase accuracy by reducing the effect of the axial component cutting forces on the result of measuring the radial component kitsey, the other end of the third tenzometrichesg Coy beam provided with a support-.nakonechnikom and introduced by sliding tangentially oriented nozzle in a groove formed in the dynamometric insert. 2. The device according to claim 1, characterized in that, in order to prevent a dynamometric insert from falling out if any tenso breaks (L of a metric beam, it is provided with an axis that is inserted with a gap into the hole made in the dynamometric insert and fixed on the disk, the value the gap is made greater than the maximum allowable deformation strain beams. cd 00 00 CX)

Description

The invention relates to load-measuring equipment and can be used to determine external resistance forces acting on the working bodies of rotary tillage machines.

A device is known for measuring the component of the cutting force on a tooth of a rotary body, which contains a disk with working teeth, among which at least one is made in the form of a torque wrench 1.

However, the device does not provide the necessary accuracy of measurement due to the mutual influence of the components of the cutting force on the measurement results

The closest in technical essence to the present invention is a device for measuring the components of the cutting force on a tooth of a rotary body, which contains a disk with working teeth, among which at least one is made in the form of a dynamometric insert associated with three strain beams fixed at one end to the disk and the second ends of the two strain-gauge beams are equipped with support tips, which are pressed against the radially oriented faces of the dynamometer insert 2

A disadvantage of the known device is the low accuracy due to the influence of the axial component of the cutting force on the measurement result of the radial component.

The purpose of the invention is to improve accuracy by reducing the influence of the axial component of the cutting force on the result of the measurement of the radial component. J

This goal is achieved by the fact that in a device for measuring component cutting forces on a tooth of a rotary body, which contains a disk with working teeth, at least one of which is made in the form of a torque wrench associated with three strain beams attached at one end to the disk , with the other ends of the two strain-gauge beams provided with support tips, which are pressed against the radially oriented faces of the dynamometer frame, the other end of the third strain-gauge beam is equipped with a support plate nechnikom and

inserted along a sliding nozzle into a tangently oriented groove made in a torque wrench.

In order to avoid falling out of the dynamometric insert in case of breakage of any strain gauge beam, the device is provided with an axis, which is inserted with a gap into the hole made in the dynamometric insert and fixed to the disk, with the gap size larger than the maximum allowable deformation of the strain gauge beams.

On fi1. T shows the device,, general view; in fig. 2 is a view A of FIG. ti in fig. 3 shows a section BB in FIG. 2J in FIG. 4 shows a section B-B in FIG. 2J in FIG. 5 is a view of Fig. 4. A device for measuring the component cutting forces on a tooth of a rotary organ has a shaft 1, sections 2-4, each of which has a disk 5 on which working teeth 6 are mounted. In one of sections 3 a torque wrench is installed

7, containing a rack 8, to which

using bolts 9 attached working tooth 10.

The disk 5 of section 3 is fitted with strain gages 11-16, each of which has a support tip that is pressed against one or another face of the rack 8. Moreover, the tip of the strain gage 11 is sensitive to the radial component of the cutting force 4 introduced by landing movement into the tangentially oriented groove 17 made in the rack

8. The tips of the strain gauges 12 and 13 sensitive to the tangential component of the cutting force are pressed against the radially oriented faces of the stand 8. The tips of the strain beams 14-16 are sensitive

to the axial component of the cutting force, pressed against the lateral facets of the rack 8.

To create a preload on the strain beams 12 and 13, a tension node is inserted, which contains a bracket 18 fixed on the disk 5 of section 3 with an opening for the valve 19, through which the tension bolt 20 connected to the tension 21, which is attached with a pin 22 to the rack 8.

one

The rack 8 has in the middle of the hole 23, through which the passage 31

The axis 24 is mounted on the disk 5 of section 3. The diameter of the hole 23 in the rack 8 is larger than the diameter of the axis 24 by an amount exceeding the possible movement of the rack during linear deformation of the strain gauges 11-16. On both sides of the B-pillar, on the axis 24, rubber washers 25 are installed, and on the end of the axis 24 a metal washer 26 is put on, fixed with a cotter pin 27.

The transfer of measurement information from the device is carried out through the end current collector 28, - mounted on the shaft t.

The device works as follows.

Before the measurements are started, the preloading of the strain gauge beams 12 and 13 is established with the help of the tension bolt. In the course of cutting the external load, the tension bolt 20 is released and does not interfere with the movement of the stand 8 when the strain gauge links 11-16 are loaded.

518384

When the working tooth 10 leaves the soil under the action of inertial forces, the stand 8 may deviate from the initial position, which will result in the next meeting of the working tooth 10 with the soil to the occurrence of additional shock loads and, therefore, to a decrease in the reliability of the measurement results. However in this

In the JO case, the tension bolt 20 rests against the head in the bracket 18 and prevents the pivot of the pillar 8 with the working tooth 10 in the direction of rotation.

In order to provide safe conditions for the staff, the rack 8 is mounted on the axis 24.

Thus, in case of breakage of any strain gauge beam, tooth 10 will not fall out.

The application of the invention will improve the accuracy of measuring the components of the cutting force on the tooth of the rotary organ.

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FIG. five

Claims (2)

1. A DEVICE FOR MEASURING THE COMPONENTS OF CUTTING FORCES ON THE TOOTH OF A RZ-3 TATIC BODY, containing a disk with working teeth, at least one of which is made in the form of a torque insert connected to three tensometric beams fixed at one end to the disk, with the other the ends of two tensometric beams are equipped with support tips, which are pressed to the radially oriented faces of the dynamometer insert, characterized in that, in order to increase accuracy by reducing the influence of the axial component of forces cutting on the measurement result of the radial component, the other end of the third tenzometrichest Coy .nakonechnikom beam provided with a support and sliding introduced tangentially oriented nozzle in a groove formed in the dynamometric insert. 2. The device according to p. 1, characterized in that, in order to exclude the loss of the dynamometer insert when any strain gauge beam breaks, it is provided with an axis, which is inserted with a gap into the hole made in the dynamometer insert, and secured on top, and the gap is larger the maximum allowable deformation of tensometric beams. > .1