Parallel motion mechanism for measuring head sensor of precision measuring instrument

Abstract

The utility model provides a parallel movement mechanism for a measuring head sensor of a precision measuring instrument, and belongs to the field of precision measurement. The utility model aims to improve the stability of a parallel movement mechanism and ensure the accuracy of precise measurement results. The device comprises a moving mechanism fixed plate, a bowl-shaped bearing, a rolling shaft and a moving mechanism movable plate, the whole movement mechanism fixing plates are of an I-shaped structure, the two movement mechanism fixing plates are arranged in parallel, and bowl-shaped bearings are arranged on the inner sides of the ends of the movement mechanism fixing plates. The two moving mechanism movable plates are arranged in parallel and define a rectangle with the moving mechanism fixed plate, and the two ends of the rolling shaft are of conical structures and penetrate through the moving mechanism movable plates to be connected with the bowl-shaped bearings. According to the utility model, the problem that a traditional elastic leaf spring generates resilience force due to deformation and is superposed with measuring force is solved, the novel mechanism is matched with the double-tip rolling shaft through the bowl-shaped bearing, the elastic resilience force is eliminated, the measuring force is only determined by external loading, the dynamic interference of the structure of the mechanism on the measuring force is avoided, and the stability and controllability of the measuring force are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of precision measurement, and in particular relates to a parallel motion mechanism for a probe sensor of a precision measuring instrument. Background Technology

[0002] In the field of precision measurement, high-precision micrometer probes of instruments such as coordinate measuring machines and gear measuring centers generally adopt elastic leaf spring parallel mechanisms to achieve micro-displacement measurement. This mechanism consists of a fixed plate, two side plates, a moving plate, and four elastic leaf springs, which can form a parallel motion between the moving plate and the fixed plate without mechanical friction. With its advantages of flexible movement and accurate resolution, it supports the accurate identification of micro-displacements.

[0003] However, in the leaf spring type parallel motion mechanism, the elastic leaf springs used to connect the fixed plate, side plate and moving plate generate a rebound force due to deformation during micro-movement, which directly acts on the parallel motion system. The rebound force of the leaf spring is superimposed on the additional measuring force, which will cause changes in the measuring force and affect the measurement results. In addition, this extra rebound force will cause system oscillation during dynamic measurement. Especially when resonance occurs, it will make the measurement extremely unstable, requiring the addition of a damping mechanism to reduce or eliminate the impact of system oscillation, thus increasing the structural complexity.

[0004] In summary, there is an urgent need to design a device that can improve the stability of parallel motion mechanisms and ensure the accuracy of precision measurement results. Utility Model Content

[0005] A brief overview of the present invention is given below to provide a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the present invention. It is not intended to identify key or essential parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] In view of this, in order to improve the stability of the parallel motion mechanism and ensure the accuracy of precision measurement results, this utility model provides a parallel motion mechanism for the probe sensor of a precision measuring instrument.

[0007] Solution: A parallel motion mechanism for a probe sensor in a precision measuring instrument, comprising a fixed plate, a cup-shaped bearing, a rolling shaft, and a movable plate.

[0008] The motion mechanism fixed plate is in the shape of an "I" and the two motion mechanism fixed plates are placed in parallel. The inner side of the end is provided with a bowl-shaped bearing.

[0009] The two moving plates of the two moving mechanisms are parallel and surrounded by the fixed plate of the moving mechanism to form a rectangle, the rolling shafts are provided with conical structures at two ends and are connected with the bowl-shaped bearings through the moving plates of the moving mechanisms.

[0010] Further, the bowl-shaped bearings are internally provided with precise steel balls.

[0011] Further, the rolling shafts are interference fitted with the fixed plate of the moving mechanism.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model solves the problem of the rebound force of the traditional elastic leaf spring due to deformation and the superposition of the measuring force, the new mechanism is matched with the double-point rolling shaft through the bowl-shaped bearing, the elastic rebound force is eliminated, the measuring force is only determined by the external loading, the dynamic interference of the structure of the mechanism on the measuring force is avoided, and the stable and controllable measuring force is ensured.

[0014] 2. The utility model continues the core advantage of the elastic leaf spring mechanism without mechanical friction, and realizes higher precision and more flexible rotary motion by means of the precise cooperation of the steel ball rolling structure and the bowl-shaped bearing, and the motion performance of micro-displacement measurement is continued and upgraded.

[0015] 3. The influence of the characteristics of the device itself on the measurement is minimized, the probe can more accurately reflect the size micro-change of the measured object, and the precision of the measurement result is ensured from the stability of force and the stability of motion. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute improper limitation on the utility model. In the drawings:

[0017] Figure 1 It is a structural schematic view of a parallel motion mechanism of a probe sensor of a precision measuring instrument;

[0018] Figure 2 It is Figure 1 It is a sectional view of A;

[0019] Figure 3 It is a structural schematic view of the device connected with the micrometer head.

[0020] In the drawings: 1 is a fixed plate of a moving mechanism, 2 is a bowl-shaped bearing, 3 is a rolling shaft, and 4 is a moving plate of a moving mechanism. DETAILED DESCRIPTION

[0021] In order to make the technical scheme and advantages in the embodiments of the utility model clearer and more apparent, the exemplary embodiments of the utility model are further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than an exhaustive list of all embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] Embodiments, reference Figures 1-3 The utility model discloses a parallel motion mechanism for precision measuring instrument measuring head sensor, including motion mechanism fixed plate 1, bowl bearing 2, rolling shaft 3 and motion mechanism dynamic plate 4.

[0023] The motion mechanism fixed plate 1 is as a whole "G" shape structure, and two motion mechanism fixed plates 1 are placed in parallel, and the inner side of the end is equipped with bowl bearing 2.

[0024] The two motion mechanism dynamic plates 4 are placed in parallel and are enclosed with the motion mechanism fixed plate 1 into a rectangle, and the both ends of the rolling shaft 3 are conical structure, and are connected with the bowl bearing 2 through the motion mechanism dynamic plate 4.

[0025] Further, the bowl bearing 2 is equipped with precision steel ball inside.

[0026] Further, the rolling shaft 3 is interference fitted with the motion mechanism fixed plate 1.

[0027] Through the utility model, the problem that the traditional elastic leaf spring produces rebound force due to deformation and is superimposed with measuring force is solved, the new mechanism is matched through bowl bearing and double pointed rolling shaft, eliminates elastic rebound force, makes measuring force only be determined by external loading, avoids the dynamic interference of the structure of the mechanism to measuring force, guarantees that measuring force is stable and controllable, and simultaneously the utility model continues the core advantage of elastic leaf spring mechanism without mechanical friction, realizes higher precision, more flexible rotary motion with the help of the precision cooperation of steel ball rolling structure and bowl bearing, and continues and upgrades the motion performance of micro displacement measurement.

[0028] Through the utility model, the size micro change of the measured object can be more accurately reflected by the measuring head, and the precision of the measurement result is guaranteed from the stability of force and the stability of motion.

[0029] While the present application has been described in terms of limited embodiments, the skilled person in the art will appreciate that other embodiments can be envisaged within the scope of the present application as described herein. Furthermore, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes and can not have been selected to delineate or circumscribe the subject application. Accordingly, the present application is intended to be illustrative, but not limiting, of the scope of the present application, which is set forth with particularity in the appended claims.

Claims

1. A parallel motion mechanism for a probe sensor of a precision measuring instrument, characterized in that, It includes a fixed plate (1) of the motion mechanism, a cup-shaped bearing (2), a rolling shaft (3) and a moving plate (4) of the motion mechanism; The motion mechanism fixed plate (1) is an overall "I" shaped structure. The two motion mechanism fixed plates (1) are placed in parallel, and a bowl-shaped bearing (2) is provided on the inner side of the end. The two moving plates (4) of the motion mechanism are placed in parallel and form a rectangle with the fixed plate (1) of the motion mechanism. The two ends of the rolling shaft (3) are tapered structures, which pass through the moving plate (4) of the motion mechanism and are connected to the bowl-shaped bearing (2).

2. The parallel motion mechanism for a probe sensor of a precision measuring instrument according to claim 1, wherein The bowl-shaped bearing (2) has precision steel balls inside.

3. The parallel kinematic mechanism for a probe sensor of a precision measuring instrument according to claim 1, wherein, The rolling shaft (3) is interference-fitted with the motion mechanism plate (1).

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