Contact type axial floating gap measuring mechanism

Abstract

The utility model discloses a contact type axial floating clearance measuring mechanism which is connected with a measuring head bearing seat through an air cylinder. The measuring head is installed on the guide shaft, and the measuring sensor is installed on the lower side of the guide shaft and makes contact with the guide shaft. And a spring limiting sleeve is arranged at the other end of the top of the guide shaft. The device has the advantages of high precision, high dynamic response frequency, low cost, easiness in assembly, high reliability and durability, easiness in maintenance, modularization and high universality. The comprehensive precision of the system is smaller than 1 micrometer, the dynamic response frequency can meet the measurement requirement for collecting 300 point data per second, and the system is suitable for measuring the axial floating gap of a product with the high precision requirement.

Description

Technical Field

[0001] The invention belongs to the technical field of automated measurement, and in particular relates to a contact type axial floating clearance measuring mechanism. Background Art

[0002] In contact-type axial floating clearance measurement, for situations where the measuring conditions are relatively complex, it is required to adopt a measuring method in which the measuring sensor indirectly contacts the surface of the object being measured through a measuring mechanism.

[0003] The existing technologies all design different measuring mechanisms according to different measurement requirements. The measuring mechanisms are of various forms: the driving force is spring force, pneumatic force, and electric force; the motion guide is linear guide rails and linear bearings. There is no unified standard in the industry, and each new mechanism needs to be redesigned, which is time-consuming and labor-intensive. In addition, the stability, reliability and durability are poor, and the dynamic response frequency is low, which makes it difficult to meet the requirements of high-precision dynamic measurement.

[0004] The driving force of the existing measuring mechanism for measuring the axial clearance is unstable, and the measurement is difficult. When the measuring head of the measuring mechanism contacts the surface of the measured object, the movement distance of the measuring mechanism will fluctuate, thereby causing fluctuations in the data collected by the measuring sensor, which in turn affects the stability of the measurement; the existing measuring mechanism has large motion damping, so the required measurement driving force is large, which can easily cause deformation of the mechanical mechanism and affect the authenticity of data collection; at the same time, the existing measuring mechanism has low motion flexibility, resulting in a low response frequency. During dynamic measurement, the movement changes of the measuring mechanism cannot quickly adapt to the shape changes of the measured surface, thereby failing to correctly collect data on the shape changes of the measured surface. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a contact-type axial floating clearance measuring mechanism, which is connected to the probe bearing seat through a cylinder; the probe is installed on the guide shaft, the measuring sensor is installed on the lower side of the guide shaft, and the measuring sensor is in contact with the guide shaft; an adjusting nut is provided on the left side of the top of the guide shaft, and a spring limit sleeve is provided on the other end. The present invention has the advantages of high precision, high dynamic response frequency, low cost, easy assembly, high reliability and durability, easy maintenance, modularization, and strong versatility. The comprehensive accuracy of the system of the present invention is less than 1 micron, and the dynamic response frequency can adapt to the measurement requirements of collecting 300 points of data per second, which is suitable for measuring the axial floating clearance of products with high precision requirements.

[0006] The technical solution adopted by the present invention to solve the technical problem includes the following steps:

[0007] A contact type axial floating clearance measuring mechanism comprises a measuring sensor, a high-precision linear bearing, a measuring head bearing seat, a spring, a measuring head, a guide shaft, a spring adjusting nut and a cylinder;

[0008] The cylinder connects the high-precision linear bearing and the guide shaft through the probe bearing seat; the spring is installed on the upper end of the guide shaft; the probe is installed on the upper end of the guide shaft; the measuring sensor is installed below the guide shaft and contacts the guide shaft.

[0009] Preferably, a spring adjusting nut is provided at the upper end of the spring for adjusting the preload force of the spring.

[0010] Preferably, the measuring mechanism further comprises a positioning unit, a transverse movement unit and a lifting unit; the positioning unit is used for centering the product, the lifting unit is used for auxiliary lifting for positioning, and the transverse movement unit is used for auxiliary switching between positioning and measurement.

[0011] The beneficial effects of the present invention are as follows:

[0012] The advantages of the present invention are that it uses high-precision linear bearings as guides, has high motion accuracy, low damping, and flexible motion. A small-thrust compression spring combined with a small cylinder can be used as the driving force for measurement; the driving force of the measuring mechanism is stable, so that its mechanical deformation is small and the deformation amount is stable, and the random influence of mechanical deformation is minimized; the use of high-precision linear bearings eliminates the random gap during the movement of the measuring mechanism, thereby removing the influence of the random gap on the measurement, and greatly improving the reliability and durability; the flexible motion and low damping make the dynamic response frequency of the measuring mechanism high; the axial clearance of the product can be measured conveniently and reliably. The measuring mechanism that meets various measurement requirements is designed as a universal measuring mechanism. It is suitable for measuring the axial floating clearance of products with high precision requirements, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural front view of the present invention.

[0014] Figure 2 It is a structural oblique view of the present invention.

[0015] Figure markings: 1-probe guide rail pad, 2-guide rail, 3-probe mounting plate, 4-measuring sensor, 5-bushing, 6-shift plate, 7-shim, 8-linear bearing, 9-probe bearing seat, 10-spring, 11-measuring head, 12-guide shaft, 13-spring adjustment nut, 14-slide cylinder cover plate, 15-cylinder, 16-lifting unit, 17-lateral movement unit, 18-positioning unit. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] The object of the present invention is to provide a contact measuring mechanism with high precision, high dynamic response frequency, good compatibility, low cost, easy assembly, high reliability, high durability, easy maintenance, modularization and strong versatility.

[0018] The mechanism of the present invention includes a measuring unit, a positioning unit, a transverse movement unit, and a lifting unit. The measuring unit is used to measure the axial clearance of the product, the positioning unit is used to center the product, the lifting unit is used for auxiliary lifting of positioning, and the transverse movement unit is used for auxiliary switching of positioning and measurement. The measuring unit is mainly composed of a sensor, a cylinder, a high-precision linear guide, a probe, etc. The guide shaft (12) and the measuring sensor (4) are connected together through a high-precision linear bearing (8); the probe (11) is installed on the upper side of the guide shaft (12), and the measuring sensor (4) is installed on the lower side of the probe 11; the measuring sensor (4) is in contact with the guide shaft (12); a spring adjustment nut (13) is provided above the guide shaft (12) for adjusting the preload force of the spring 10.

[0019] Example:

[0020] The measuring unit of the present invention mainly consists of a sensor, a cylinder, a high-precision linear guide rail, a probe, etc. The cylinder (15) connects the high-precision linear bearing (8) and the guide shaft (12) together through the probe bearing seat (9). The spring 10 is installed on the upper end of the guide shaft 12 to adjust the size of the preload force through the adjusting nut (13); the probe (11) is installed on the upper end of the guide shaft 12; the measuring sensor 4 is installed on the lower side of the guide shaft 12 and is always in contact with it. During measurement, the height of the workpiece is measured by moving the cylinder upward, and the height of the workpiece is measured again by moving the cylinder downward. The difference between the two heights is the axial floating clearance of the product.

[0021] Combined with Figure 2 The working principle of the present invention is further described;

[0022] Attached Figure 1 It is a measurement state for measuring the axial floating clearance of the product. Figure 1 On the basis of the invention, a lifting unit (16), a lateral movement unit (17) and a positioning unit (18) are added to Figure 2 Combined with Figure 1 The actual working principle of the measuring mechanism is explained in detail using an example.

[0023] When the product enters the measured area, the sensor detects the presence of the product, the lateral unit moves into position, the positioning cylinder moves up and positions the product, the workpiece is pressed and fixed, the positioning exits, the measuring unit is in place, the lifting unit rises, and the measuring unit starts measuring. Through this process, the automatic measurement of the product axial clearance is completed.

Claims

1. A contact type axial floating clearance measuring mechanism, characterized in that: It includes measuring sensor, high precision linear bearing, probe bearing seat, spring, probe, guide shaft, spring adjustment nut and cylinder; The cylinder connects the high-precision linear bearing and the guide shaft through the probe bearing seat; the spring is installed on the upper end of the guide shaft; the probe is installed on the upper end of the guide shaft; the measuring sensor is installed below the guide shaft and contacts the guide shaft.

2. A contact type axial floating clearance measuring mechanism according to claim 1, characterized in that: A spring adjusting nut is provided at the upper end of the spring for adjusting the preload force of the spring.

3. A contact type axial floating clearance measuring mechanism according to claim 1, characterized in that: The measuring mechanism also includes a positioning unit, a transverse movement unit and a lifting unit; the positioning unit is used for centering the product, the lifting unit is used for auxiliary lifting for positioning, and the transverse movement unit is used for auxiliary switching between positioning and measurement.

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