CN102297670A - Device for converting direction of micro-displacement - Google Patents

Abstract

The invention discloses a device for micro-displacement direction conversion, which belongs to the technical field of precision mechanical measurement and is used for the conversion of micro-displacement so as to be able to measure accurately. It is characterized in that the device is mainly composed of a measuring head, a cross spring leaf, a transmission lever and a sensor. The measuring head is installed on the transmission lever and is used to measure the small displacement in the X direction. The transmission lever is fixed on the support through the cross spring leaf, and the sensor is located on the right side of the transmission lever. When the measuring head is displaced in the X direction, the transmission lever can convert the displacement into the Y direction displacement with the intersection point of the cross spring as the fulcrum, and then realize the conversion of the displacement direction and realize accurate measurement. The invention has the beneficial effects of high sensitivity, small measurement force, no gap, simple operation and accurate displacement transmission for a small amount of rotation.

Description

A device for micro-displacement direction conversion

technical field

The invention belongs to the technical field of precision mechanical measurement, and relates to a device for micro-displacement direction conversion, which can change the direction of displacement and facilitate accurate measurement. the

Background technique

In the field of engineering, due to reasons such as inconvenient location or narrow space, some small displacements need to be converted in direction before they can be measured. The conversion process of the small displacement direction must strictly guarantee the additional error in the conversion process. The current conversion displacement direction is generally realized by a lever device, and the fulcrum of the lever adopts the method of hole shaft matching. Due to the fit clearance of the hole shaft, additional errors are added in the process of displacement transmission, which ultimately affects the measurement accuracy of small displacements. Therefore, it is very necessary to find a simple, feasible and high-precision method to realize the conversion of small displacement directions. the

Contents of the invention

The technical problem to be solved by the present invention is a method for converting the direction of micro-displacement, which is used to convert the direction of micro-displacement, and then realize accurate measurement of displacement. the

Technical scheme of the present invention is as follows:

The device using this method includes a probe, a transfer lever, a cross spring and a sensor. The structure is shown in the schematic diagram. In order to reduce the influence of the measurement error of the transmission lever, the transmission lever is made of aluminum material to reduce the influence caused by weight. The upper surface of the lever has a certain flatness requirement. The lever has an L-shaped structure as a whole, a large elliptical hole runs through the entire lever on the side, and a small hole communicates with the large hole on the upper surface. The small hole is used to penetrate the bottom rod of the probe, and the large hole is used to put the nut, which is screwed on the bottom rod of the probe to fix the probe. The bottom of the lever is a thin trapezoidal structure. In order to further reduce the mass of the lever, a triangular hole runs through the bottom of the trapezoidal plate. The bottom surface requires a certain flatness. The measuring head is installed on the transmission lever and is used to measure the small displacement in the X direction. The hinge structure of the cross spring leaf type is used to replace the shaft hole structure commonly used in the rotary body. The transmission lever is fixed on the support by two intersecting spring plates placed across each other, and the sensor is located on the right side of the transmission lever. When the measuring head is displaced in the X direction, the transmission lever can convert the displacement into the Y direction displacement by using the intersection of the cross spring pieces as the fulcrum, and then realize the conversion of the displacement direction and realize accurate measurement. the

The invention has the beneficial effects of high sensitivity, small measurement force, no gap, simple operation and accurate displacement transmission for a small amount of rotation. the

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention. the

Fig. 2 is a schematic diagram of the transmission lever structure. the

In the figure: 1 measuring head; 2 cross spring leaf; 3 transfer lever; 4 support; 5 sensor. the

Detailed ways

The specific embodiments of the patent of the present invention are described in detail below in conjunction with technical solutions and accompanying drawings. the

As shown in Figure 1, the measuring head 1 is installed on the transmission lever 3 for measuring the small displacement in the X direction. The transmission lever is fixed on the support 4 by two spring sheets (cross spring sheets 2 ) placed across each other, and the sensor 5 is located on the right side of the transmission lever. During the measurement process, the workpiece rotates around the fixed axis in the direction of the arrow. When the surface contacted by the probe 1 has a shape error, the probe 1 will be displaced in the X direction, causing the transfer lever to rotate with the intersection of the cross spring pieces as the fulcrum, resulting in the following Effect: The left and right translation distance of probe 1 is linearly related to the up and down movement distance measured by probe 2. In this way, the translation in the left and right directions of the probe 1 can be accurately calculated through the movement value of the probe 2 . When it is inconvenient to directly measure the shape error of the contact surface, it can be used to realize the transfer of the measurement direction (that is, the displacement change in the left and right directions that is not easy to measure is converted into the displacement change in the up and down direction that is easy to measure) for accurate measurement. the

Claims (1)

1. A device for micro-displacement direction conversion, characterized in that: The device includes a measuring head, a transfer lever, a cross spring and a sensor; the upper part of the lever is an L-shaped structure, and a large elliptical hole runs through the entire lever on the side, and a small hole communicates with the large hole on the upper surface; the small hole is used for the bottom rod of the measuring head. The bottom of the lever is a thin trapezoidal structure, and a triangular hole runs through the bottom of the trapezoidal plate; the probe is installed on the transfer lever; the transfer lever The sensor is located on the right side of the transmission lever by two intersecting cross springs placed on the support; when the measuring head is displaced in the X direction, the transmission lever uses the intersection of the cross springs as the fulcrum to convert the displacement into the Y direction displacement.

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