JPH02667Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piston ring tension measuring device, and more particularly to a piston ring tension measuring device with a coil expander as shown in FIG.

A conventional piston ring tension measuring device has been a method in which a piano wire is wound around the piston ring and one end of the wire is tied to a tension measuring device to measure the tension. However, with this method, when measuring several piston rings, it is necessary to set the gap between each piston ring, and especially in the case of a piston ring with a coil expander, it is necessary to adjust the coil expander installed inside the piston ring. There are drawbacks such as the need to manually perform the process, poor workability, and a large number of errors in inserting, so improvements have been sought.

The present invention is a piston ring tension measuring device that eliminates the above-mentioned drawbacks and can quickly and accurately measure piston ring tension with simple operation.

This will be explained below with reference to the attached drawings.

Figures 1 and 2 show the piston ring tension measuring device of the present invention, in which a spool 2 on which a piston ring to be measured A is placed and a spool holder 1 that supports it.
A vibration generator that vibrates the spool holder is arranged in the center, and a steel band 3 has a bellows cylinder on one side that can adjust the length of the steel band 3 wrapped around the piston ring A to be tested. A load cell 1 is equipped with a support device, and a steel band 3 is connected to the other side to measure the tensile force.
2 is a piston ring tension measuring device.

First, place the piston ring A to be tested on the spool holder 1.
After setting the steel band 3 on the upper spool 2 and winding it around the piston ring A, the tight steel band 3 is set with the stopper screw 4 and fixed with the lock nut 5.

Once set so that a predetermined gap a is obtained in this way, when measuring the tension of the second piston ring with the same outer diameter, the pneumatic control unit can be operated by operating the velofrom cylinder 6. Only the specified joint gap a
can be obtained automatically. When the gap gap setting is completed, a vibration generator consisting of a gear motor 7, an eccentric cam 8, and a connecting rod 9 generates vibration for a certain period of time to acclimate the piston ring A. In particular, the expander of the piston ring with a coil expander is adjusted to the piston ring. After getting used to it,
Tension is measured by a load cell 10. In the accompanying drawings, the vibration generator generates vibrations in the lateral direction, but it goes without saying that one that generates vibrations in the vertical direction is equally effective.

It is more effective to display the tension measured in this way on a digital display or record it on a printer. The tension measuring device of the present invention saves the trouble of measuring the tension of piston rings by setting the gap between each piston ring. A ring tension measurement device that can automatically fit the coil of a piston ring with a coil expander to the piston ring, saving labor and quickly measuring accurate tension. You can get it.

[Brief explanation of the drawing]

FIG. 1 is a front view of the ring tension measuring device of the present invention. FIG. 2 is a side view of the ring tension measuring device of the present invention. Figure 3 is a sectional view of an oil ring with a coil expander. Explanation of symbols, 11...Load cell mounting base, 12...
Band clasp, 13... Arm fulcrum, 14... Arm, 15... Center pin, 16... Fulcrum metal fitting, 17... Arm, 18... Flexible metal fitting, 19... Band presser foot, 2
0...Steel band free end, 21...Push screw.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A spool 2 on which the piston ring to be tested A is placed, a spool holder 1 that supports it, and a vibration generator that vibrates the spool holder 1 are arranged in the center of the device, On one side, a steel band 3 support device with a velofrom cylinder 6 that can adjust the length of the steel band 3 wrapped around the piston ring A to be tested is arranged, and on the other side, the steel band 3 is supported. In a piston ring tension measuring device having a load cell 12 that connects the other side and measures the tensile force, once a predetermined abutment gap a of the piston ring is set, the action of the VeroFrom cylinder 6 A piston ring tension measuring device characterized in that a predetermined gap a is continuously obtained. (2) Scope of Utility Model Registration Claim 1, which is characterized in that the tension of the piston ring is measured after the piston ring A to be tested fixed with a steel band 3 is vibrated by a vibration generator for a certain period of time. The described piston ring tension measuring device.