SU1117468A1 - Device for measuring torque - Google Patents

Abstract

A DEVICE FOR MEASURING A TORQUE containing a base in which a disk equipped with a coaxial connecting shaft and connected to a reading unit with a scale, a tension unit and an tension spring are mounted with a rotating shaft, one end of which is hinged to the base through the tension unit , characterized in that, in order to make it possible to measure the reversal of F1x moments and to linearize the scale of the reference node, the disk is provided with a finger, which is installed perpendicular to the disk plane at a predetermined distance And from its center, to the finger is a hinge but the second end of the extension spring is attached, and to the mezvdu elements of the device there is an L / R ratio of 6-8 €

Description

one

The invention relates to a measurement technique and can be used to measure torques, e.g. electric motors.

A device for measuring torque is known, comprising a base in which a disk is rotatably mounted, fitted with a connecting shaft, a spring, and a reading unit with a scale P.

This device does not provide the ability to measure reversed moments.

Closest to the present invention is a device for measuring the torque of a torque, comprising a base in which a disk fitted with a coaxial connecting shaft and connected to a reading unit with a scale, a tension node and an extension spring are mounted, which has one end through the node The pin is pivotally attached to the base 21.

However, the known device also does not provide the ability to measure reversible moments and has a non-linear scale.

The purpose of the invention is to provide the possibility of measuring reversible moments and linearizing the scale of the reference node.

This goal is achieved by the fact that in a device for measuring torque, comprising a base, in which a disk is mounted rotatably, equipped with a coaxial connecting shaft and connected to a reading unit with a scale, a tension unit and a tension spring, one end where the tension node is pivotally attached to the base, the disk is provided with a finger, which is installed perpendicular to the disk plane at a specified distance from the center of the disk, the second end of the expansion spring is pivotally attached to the finger, and between the element mi device is correlated

L / R 6-8

  , (0.41-0.45) P / R

L is the distance between the center of the disk and the point of attachment of one end of the tension spring - 55;

R is the distance between the center of the disk and the axis of the finger5

7468

 - stiffness of the tension spring, P - force of the initial tension

tension springs in the absence of torque on the connecting shaft. FIG. 1 shows a device for measuring torque, a longitudinal section j in FIG. 2 is a view O of FIG. one; in fig. 3 - kinematic scheme of the device; in fig. 4 is a graph of measured torque versus angle of rotation of the shaft.

5 The device for measuring the torque moment comprises the base 1, the shaft 2 of the measured torque with the gear disk 3, the reading unit 4, the tension spring 5 and the node 6 stretching. The reading unit 4 contains an axis 7 with a gear 8 and a scale 9. The tension unit 6 contains a fork 10 with an axis 11, on which a bearing 13 is installed through bearings 12, and a nut 14. 5 On the gear disk 3, a pin 15 is installed, on which through bearings 16 installed second earring 1Z

The measured torque shaft 2 and the axis 7 are mounted in the base 1 on the bearings 18 and 19, the gear disk 3 is brought into engagement with the gear 8, and the ends of the tension spring 5 are fixed in the studs 13 and 17.

For reading on a scale of 9 on the basis of 1, risk is 20.

To ensure the linearity of the scale 9 in the device, follow the following relations:

L / R 6-8 -Ee (0.41-0.45) P / R

where L is the distance from the center of the gear disk 3 to the axis 11; R is the distance between the center of the gear disk 3 and the axis of the finger 15 P - the initial tension force

tension springs (in the absence of torque on shaft 2).

The device for measuring torque acts as follows.

By means of the nut 14, the initial tension of the spring 5 is carried out. At the same time, in the absence of a torque on the shaft 2 of the risk 20 on the basis of 1, it must coincide with the zero of the scale 9. When a measured torque is applied to the shaft 2, the latter will turn through an angle where the spring 5 stretches the measured torque. The angle ot through a gear (gear disk 3 gear 8) is converted into a rotation angle of scale 9 relative to risks 20, at which the magnitude of the measured moment is judged.

When the ratio L / R (6-8) and

. (0.41-0.45) P / R is non-linear. Scene x-.

characteristics M A () does not exceed

S4

7, p ps units (x, 0-3 (I (Fig. 4)), while ensuring the gear ratio between the toothed disk 3 and the gear 8, it is possible to have a linear scale 9 within 180 from both sides.

The lower limit of the ratio IJVR is determined by the required linearity of the scale 9, and the upper limit by the restriction on the dimensions of the device.

The proposed device makes it possible to measure the reversible torque, for example, an electric motor, at a linear reading scale in a wide range of torque values.

Type A

.

Figg

5} 0 15 20 Angle nodofioma shaft

25

Claims (1)

DEVICE FOR TORQUE MEASUREMENT, comprising a base in which a disk is mounted rotatably, provided with a coaxial connecting shaft and connected to a reading unit with a scale, a tension unit and a tension spring, one end of which is pivotally attached to the base through the tension unit, characterized in that , in order to provide the possibility of measuring reversible moments and linearizing the scale of the reading unit, the disk is equipped with a finger that is installed perpendicular to the plane of the disk at a given distance from e about the center, the second end of the tension spring is hinged to the finger, and the ratio between the elements of the device is maintained L / R "= 6-8" (0.41-0.45) P / R, where L is the distance between the center of the disk and the attachment point of one end of the tension spring, · R is the distance between the center of the disc and the axis of the finger} - spring stiffness ‘ P is the force of the initial tension of the tension spring in the absence of torque on the connecting shaft. . SU., .. 1117468> 1 1117468