RU2139492C1 - Gear measuring inner dimensions of hollow parts - Google Patents

Abstract

FIELD: measurement technology, measurement of inner dimensions of hollow parts of complex structure. SUBSTANCE: gear has case with dial put on it and mobile measurement member. Case carries support fitted with spring-loaded clamp mounted for movement along support and for contact with part and with spring-loaded upper and lower rests-fixing arms arranged on case for vertical movement over it. Measurement member is manufactured in the form of bell-crank. One arm of it presents measurement pointer, second arm is vernier. Bell-crank is coupled to dial with the use of common axle and can turn about this axle by means of spring linking vernier with dial. Dial with measurement pointer and axle on which they are put are mounted for vertical movement. Case is equipped with reading scale. EFFECT: described design of gear makes it feasible to increase measurement precision and to avoid additional operations for adjustment of gear. 3 cl, 2 dwg

Description

 The invention relates to measuring technique and can be used when measuring the dimensions of hollow parts of complex configuration.

 A device for measuring the internal dimensions of hollow parts (and.with. N 361382, 1973). The device contains two tips and a wedge gear on the reading head.

 The use of this device does not provide access to the measurement points on the inner surface of the controlled part.

 A device for measuring the diameter of the holes is also known (A.S. N 819560, 1976). A device containing a tubular body, a reference scale, a rotary rod as a measuring element and a limb placed on the body can serve as a prototype.

 The disadvantage of this device is that it cannot guarantee the accuracy of measurements, and it becomes necessary to configure the device before each measurement.

 An object of the invention is to increase the accuracy of the measurement, eliminating additional operations to configure the device.

 The technical essence of the solution lies in the fact that the device for measuring the internal dimensions of hollow parts, comprising a housing with a limb placed on it, and a movable measuring element, is equipped with a stand mounted on the housing and equipped with a spring-loaded clip installed with the ability to move around the rack and fully contact with the part, and spring-loaded upper and lower stops-latches placed on the housing with the possibility of vertical movement along it. The measuring element is made in the form of a two-shouldered lever, one shoulder of which is a measuring arrow, the second is a nonius, while the two-shoulder lever is connected to the limb by a common axis with the possibility of rotation around it by means of a spring connecting the nonius with the limb. A limb with a measuring arrow and the axis on which they are placed is placed with the possibility of vertical movement, and the housing is equipped with a reading scale.

 Figure 1 shows a General view of the device, figure 2 is a side view.

 The device consists of a housing 1, movable stops of the lower 4 and upper 5 using springs 2 and 3, a limb 6 located in a vertical groove (not indicated) of the housing 1. The limb 6 and the measuring element 7, made in the form of a two-shouldered lever, one shoulder being arrow, the second - nonius, placed on the same axis 8, with the possibility of rotation around axis 8 by means of a spring 9, as well as the limb 6 and the measuring element 7 together with the axis can move in the vertical direction along the groove (not marked) of the housing 1. Fixing the limb 6 with measuring element 7 is carried out by the clamping nut 10. The clamp 11 is spring-loaded and is located in the rack 12, mounted in the housing 1.

 The device operates as follows.

 The controlled part is placed on the housing 1, resting the bottom against the upper spherical end of the housing 1, centered on the lower 4 and upper 5 stops moving along the housing 1 using springs 2, 3, and is provided with full contact of the part with the spherical end of the housing 1, spring-loaded clamp 11, having the ability to move in the rack 12.

 The limb 6, the measuring element 7, located on the axis 8, are set on the reading scale on the housing 1 to the position corresponding to the measured size on the inner surface of the controlled part. The limb 6 moves along the groove (not shown) of the housing 1, it is fixed by the clamping nut 10, and the measuring element 7 is pressed to the controlled part by the spring 9. The measurement result is determined by the reference scale of the limb 6, by the reading of the nonius of the measuring element 7, and the deviation of the upper the end of the measuring arrow from the vertical axis "O" by 14 mm corresponds to the rotation of the nonius by 14 divisions of limb 6.

Claims (3)

 1. A device for measuring internal hollow parts, comprising a housing with a limb placed on it and a movable measuring element, characterized in that it is equipped with a stand mounted on the housing and equipped with a spring-loaded clip mounted to move around the rack and fully contact with the part, and spring-loaded upper and lower stops-latches placed on the body with the possibility of vertical movement along it.  2. The device according to claim 1, characterized in that the measuring element is made in the form of a two-shouldered lever, one shoulder of which is a measuring arrow, the second is a nonius, while the two-shoulder lever is connected to the limb by a common axis with the possibility of rotation around it by means of a spring connecting the nonius with a limb.  3. The device according to p. 1, characterized in that the limb with a measuring arrow and the axis on which they are placed is placed with the possibility of vertical movement, and the housing is equipped with a reading scale.

Images