JPS5841447Y2 - Power point for weighing conversion of force checking device for hydraulic testing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a weight conversion power point of a force detection device for a hydraulic testing machine.

Prepare multiple test oil pressure measurement rams, convert the oil pressure into a predetermined measurement ram depending on the size of the measurement oil pressure, input it to a predetermined point on the measurement lever corresponding to the ram, output from the point of action, and use the indicator. The purpose is to provide a point of emphasis that can accurately transmit the measured oil pressure between the measuring ram and a predetermined point on the lever, both before and after switching, when the measured oil pressure value is displayed by moving the lever. The details of the embodiments are as follows with reference to the drawings.

1 is a push rod (not shown) that is raised and lowered by a measuring ram.

Reference numeral 2 is attached to the outer periphery of the lower end of the push rod 1 with an elastic ring, for example, a 0'J ring, and the lower end surface 3 of the push rod 1 serves as one element of the point of force.

Reference numeral 4 denotes a steel rod, which is the other element of the force point, and is installed horizontally at a position relative to the push rod 1 of the lever 5 and at the bottom of the push rod insertion hole 7 whose upper end forms a tapered guide surface 6.

The inner diameter of the fitting hole 7 matches the outer diameter of the elastic ring 2, and the ring 2 maintains an appropriate gap S between the push rod 1 and the inner wall surface of the hole 7, and determines the position.

This insertion hole 7 may be provided in the lever 5, but in the illustrated example, it is provided in the steel bar support 8, and is attached to the lever 5 by a bolt 10 inserted into a lever ratio adjustment long hole 9 passing through the lever 5. Installation.

Reference numeral 11 is a fulcrum of the lever 5, and reference numeral 12 is an application point to which a tension rod 13 is connected.

The force points shown in the figure are used by appropriately switching according to the magnitude of the measured oil pressure, and the oil pressure applied to the push rod 1 is accurately transmitted to the lever 5.

That is, in FIG. 1, if the push rod 1 in the center is operated by switching from either the left or right push rod, the push rod 1 descends and touches the guide surface 6.
The push rod 1 is guided into the fitting hole 7 by the elastic ring 2, and the outer periphery of the elastic ring 2 comes into close contact with the wall surface of the fitting hole 7, so the push rod 1 is positioned, and the lower end surface 3 comes into contact with the periphery of the steel rod 4, causing the lever 5 to be pressurized and tilted. , the oil pressure is indicated on the scale by a pointer from the tension rod 13 at the point of action 12 via a normal interlocking mechanism.

When the lever 5 is tilted, the elastic ring 2 is bent so that the push rod 1
The slight displacement of is absorbed and does not interfere with oil pressure measurement.

According to the present invention, the lower end surface of the push rod is provided with an elastic ring on the outer periphery of the lower end, and the steel rod is installed horizontally at the bottom of the push rod insertion hole at a position related to the push rod of the lever and whose upper end serves as a tapered guide surface. Since the force point is configured, when converting the force point between the measuring lever and the push rod by converting the measuring ram, the force point can be configured as an accurate force transmission part, and even when the lever is tilted, the elastic ring flexes to prevent the push rod from moving. It has various effects, such as being able to absorb minute displacements and therefore accurately measuring hydraulic pressure before and after changing the force point.

[Brief explanation of drawings]

FIG. 1 is a side view showing a specific example of the point of emphasis according to the present invention, FIG. 2 is a detailed cross-sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line B--B in FIG. 1... Push rod, 2... Elastic ring, 3...
...lower end surface, 4...steel rod, 5...lever, 6...tapered guide surface, 7...
push rod hole

Claims (1)

[Scope of utility model registration request] The lower end surface of the push rod, which has an elastic ring on the outer periphery of the lower end, and the bottom of the push rod insertion hole, where the push rod is related to the lever and whose upper end is a tapered guide surface, are placed horizontally with an axis parallel to the axis of rotation of the lever. The power point for converting the weight of the force detection device for the hydraulic testing machine, which is drilled from the installed steel rod.