Lossless lock shaft test tool for angular displacement potentiometer performance test

Abstract

The utility model discloses a lossless lock shaft test tool for angular displacement potentiometer performance test, which comprises a mounting seat, a locking screw and a movable locking seat, the mounting seat is provided with a shaft hole and a locking hole which are communicated with each other, a mounting groove is arranged on the mounting seat, the locking hole is communicated with the mounting groove, and the movable locking seat is arranged in the mounting groove. A convex locking column is arranged in the middle of the end, close to the locking hole, of the movable locking seat, the locking column is arranged in the locking hole, the locking screw is installed on the installation seat, and the stud end of the locking screw abuts against the surface of the end, opposite to the locking column, of the movable locking seat. The movable locking seat is additionally arranged, the locking column is arranged on the movable locking seat, and the locking column cannot rotate in the shaft locking process, so that a rotating shaft of the angular displacement potentiometer cannot be scratched, the appearance of the angular displacement potentiometer can be kept intact, and under the condition that the tightening force on the locking screw is within a rated range, the locking effect is good. The mechanical structure of the angular displacement potentiometer is not damaged, and the angular displacement potentiometer is better protected.

Description

Technical Field

[0001] The utility model relates to a performance test tooling for an angular displacement potentiometer, in particular to a non-destructive shaft locking test tooling for the performance test of an angular displacement potentiometer. Background Art

[0002] With the development of industrial control systems towards miniaturization and precision, the position feedback displacement sensors or potentiometers used in conjunction with them are widely used. Among them, angular displacement potentiometers (sensors) are used to feedback angular displacement signals and have a very wide range of applications.

[0003] To ensure the reliable application of angular displacement potentiometers, various types of tests are usually required, such as mechanical tests, environmental tests, etc. During mechanical, environmental and other test processes, it is necessary to fix the output shaft of the angular displacement potentiometer to facilitate monitoring the performance differences before and after the test and the changes in performance parameters during the test. Fixing the output shaft of the angular displacement potentiometer is called shaft locking, which is generally achieved through a shaft locking test tooling.

[0004] The traditional shaft locking test tooling for the performance test of angular displacement potentiometers generally includes a mounting base, on which a vertical shaft hole and a horizontal screw hole are provided. One end of the screw hole communicates with the middle section of the shaft hole. During use, the angular displacement potentiometer is installed on the mounting base and its rotating shaft is placed downward in the shaft hole, and the locking screw is installed in the screw hole. The locking screw is rotated to press against the rotating shaft of the angular displacement potentiometer to fix the rotating shaft.

[0005] The above traditional shaft locking test tooling has the following defects: during the process of rotating and pressing the rotating shaft of the potentiometer by the locking screw, the end of the locking screw has rotational friction against the outer wall of the rotating shaft. On the one hand, it is easy to scratch the rotating shaft, affecting the product appearance and being not conducive to delivering to customers. On the other hand, when the locking screw rotates, it will generate a rotational force on the rotating shaft rather than a single pressure, and this rotational force is likely to cause the rotating shaft to have a tendency to bend (with the root of the rotating shaft as the fulcrum) relative to the housing of the angular displacement potentiometer, and this bending tendency may damage the mechanical structure of the angular displacement potentiometer and affect the normal angular displacement feedback function. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a non-destructive shaft locking test tooling for the performance test of an angular displacement potentiometer based on non-rotating pressing to solve the above problems.

[0007] The utility model realizes the above purpose through the following technical solutions:

[0008] A non-destructive shaft locking test tooling for angular displacement potentiometer performance testing, comprising a mounting base and a locking screw. The mounting base is provided with a shaft hole with a vertical axis for placing the shaft of the angular displacement potentiometer and a locking hole with a horizontal axis. One end of the locking hole communicates with the middle section of the shaft hole. The non-destructive shaft locking test tooling for angular displacement potentiometer performance testing further comprises a movable locking seat. An installation groove is provided on the upper surface of the mounting base. The locking hole communicates with the installation groove and is located between the installation groove and the shaft hole. The movable locking seat is placed in the installation groove. A locking column protruding outward is provided in the middle of one end of the movable locking seat close to the locking hole. The locking column is placed in the locking hole. The horizontal locking screw is installed on the mounting base and the end of its stud abuts against the surface of the end of the movable locking seat opposite to the locking column.

[0009] Preferably, in order to facilitate the installation of the locking screw, the non-destructive shaft locking test tooling for angular displacement potentiometer performance testing further comprises a fixed locking seat. The fixed locking seat is installed in the installation groove by a vertical locking seat installation screw. The movable locking seat is located between the fixed locking seat and the locking hole. The fixed locking seat is provided with a horizontal screw hole and the locking screw is installed in this screw hole.

[0010] Preferably, in order to complete the performance testing of multiple angular displacement potentiometers at one time to improve efficiency, one installation groove, one fixed locking seat, one locking screw, one movable locking seat, one locking column, one locking hole and one shaft hole together constitute a locking assembly. The mounting base extends outward around to form a mounting plate. A plurality of locking assemblies are provided on the mounting plate. The plurality of locking assemblies are distributed in two rows and each row of locking assemblies comprises a plurality of the locking assemblies arranged in sequence. The two rows of locking assemblies are respectively close to the opposite two side edges of the mounting plate.

[0011] Preferably, in order to further improve the anti-rotation function of the locking column, the radial cross-section of the locking hole and the radial cross-section of the locking column are both square.

[0012] Preferably, in order to enable the movable locking seat to automatically reset after the test is completed, a reset compression spring is installed between the end wall of the installation groove close to the locking hole and the movable locking seat.

[0013] Preferably, in order to further reduce the possibility of the locking column scratching the shaft of the angular displacement potentiometer, the locking column is a brass column. If the movable locking seat and the locking column are integrally formed, they are both made of brass.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The utility model adds a movable locking seat and is provided with a locking column on the movable locking seat. When locking the shaft, the movable locking seat and the locking column are driven to move linearly by a locking screw. After the locking column moves in place, it presses the rotating shaft of the angular displacement potentiometer to achieve the function of locking the shaft. During the shaft locking process, the locking column does not rotate, so it will not scratch the rotating shaft of the angular displacement potentiometer, and can keep the appearance intact. Moreover, when ensuring that the tightening force on the locking screw is within the rated range (which can be obtained through design and limited tests), the rotating shaft will not have a tendency to bend relative to the housing of the angular displacement potentiometer, avoiding damage to the mechanical structure of the angular displacement potentiometer and better protecting the angular displacement potentiometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 6 is a perspective view of the non-destructive shaft locking test tool for angular displacement potentiometer performance testing according to Embodiment 1 of the present utility model during use;

[0017] Figure 2 FIG. 7 is a top view of the non-destructive shaft locking test tool for angular displacement potentiometer performance testing according to Embodiment 1 of the present utility model during use;

[0018] Figure 3 FIG. Figure 2 is a sectional view taken along line A-A in FIG.

[0019] Figure 4 FIG. 8 is a top view of the non-destructive shaft locking test tool for angular displacement potentiometer performance testing according to Embodiment 2 of the present utility model during use. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below in conjunction with the embodiments and the drawings:

[0021] Embodiment 1:

[0022] As Figures 1-3 shown, a non-destructive shaft locking test tool for angular displacement potentiometer performance testing includes a mounting base 1, a locking screw 6 and a movable locking seat 7. The mounting base 1 is provided with a shaft hole 13 with a vertical axis for placing the rotating shaft 12 of the angular displacement potentiometer 9 and a locking hole with a horizontal axis (not marked in the figure, that is, the hole through which the locking column 8 passes). One end of the locking hole communicates with the middle section of the shaft hole 13. An installation groove 2 is provided on the upper surface of the mounting base 1. The locking hole communicates with the installation groove 2 and is located between the installation groove 2 and the shaft hole 13. The movable locking seat 7 is placed in the installation groove 2. A convex locking column 8 is provided in the middle of one end of the movable locking seat 7 close to the locking hole. The locking column 8 is placed in the locking hole. The horizontal locking screw 6 is installed on the mounting base 1 and the end of its stud abuts against the surface of the end of the movable locking seat 7 opposite to the locking column 8.

[0023] As Figures 1-3As shown in the figure, this embodiment also discloses the following various more optimized specific structures:

[0024] To facilitate the installation of the locking screw 6, the non-destructive shaft-locking test tooling for angular displacement potentiometer performance testing further includes a fixed locking seat 4. The fixed locking seat 4 is installed in the installation groove 2 through a vertical locking seat mounting screw 3. The movable locking seat 7 is located between the fixed locking seat 4 and the locking hole. The fixed locking seat 4 is provided with a horizontal screw hole 5 and the locking screw 6 is installed in this screw hole 5.

[0025] To further improve the anti-rotation function of the locking post 8, the radial cross-section of the locking hole and the radial cross-section of the locking post 8 are both square.

[0026] To enable the movable locking seat 7 to automatically reset after the test is completed, a return compression spring 10 is installed between the end wall of the installation groove 2 near the locking hole and the movable locking seat 7.

[0027] To further reduce the possibility of the locking post 8 scratching the rotating shaft 12 of the angular displacement potentiometer 9, the locking post 8 is a brass post. If the movable locking seat 7 and the locking post 8 are integrally formed, they are both made of brass.

[0028] As Figures 1-3 shown in the figure, during application, the angular displacement potentiometer 9 is installed on the mounting seat 1 through a vertical potentiometer mounting screw 11, and the rotating shaft 12 of the angular displacement potentiometer 9 is placed in the shaft hole 13. Then, the locking screw 6 is rotated to push the movable locking seat 7 and the locking post 8 to move towards the rotating shaft 12 until the locking post 8 presses the rotating shaft 12 tightly to achieve the shaft-locking function. Generally, the rotating shaft 12 is a flat shaft, so the shaft-locking function of the rotating shaft can be achieved without too much pressure. Then, relevant performance tests can be started. After the test is completed, only need to rotate the locking screw 6 in the reverse direction. Under the action of the return compression spring 10, the movable locking seat 7 and the locking post 8 can automatically move away from the rotating shaft 12 to achieve the functions of unlocking the shaft and automatic reset, and make preparations for the next test.

[0029] Embodiment 2:

[0030] As Figures 1-4As shown, on the basis of the above-mentioned Embodiment 1, in order to complete the performance tests of multiple angular displacement potentiometers 9 at one time to improve efficiency, an installation groove 2, a fixed locking seat 4, a locking screw 6, a movable locking seat 7, a locking post 8, a locking hole, and a shaft hole 13 together constitute a locking assembly 15. The periphery of the mounting seat 1 extends outward to form a mounting plate 14, and a plurality of locking assemblies 15 are provided on the mounting plate 14. The plurality of locking assemblies 15 are arranged in two rows, and each row of locking assemblies 15 includes a plurality of locking assemblies 15 arranged in sequence. The two rows of locking assemblies 15 are respectively close to the opposite side edges of the mounting plate 14. In application, similar to Embodiment 1, when multiple angular displacement potentiometers 9 are installed on the mounting seat 1, the performance tests of multiple angular displacement potentiometers 9 can be completed at one time.

[0031] The above-mentioned embodiments are only the preferred embodiments of the present invention, and do not limit the technical solutions of the present invention. Any technical solution that can be achieved on the basis of the above-mentioned embodiments without creative labor shall be regarded as falling within the scope of the patent rights of the present invention.

Claims

1. A non-destructive locking shaft test tool for testing the performance of an angular displacement potentiometer, comprising a mounting seat and a locking screw, wherein the mounting seat is provided with an axial hole with a vertical axis and used to place the rotating shaft of the angular displacement potentiometer, and a locking hole with a horizontal axis, wherein one end of the locking hole is connected to the middle section of the axial hole, and is characterized in that: The non-destructive locking shaft test tooling for angular displacement potentiometer performance testing also includes a mobile locking seat, a mounting groove is provided on the top of the mounting seat, the locking hole is connected to the mounting groove and is located between the mounting groove and the shaft hole, the mobile locking seat is placed in the mounting groove, and a protruding locking column is provided in the middle of one end of the mobile locking seat close to the locking hole, the locking column is placed in the locking hole, the transverse locking screw is installed on the mounting seat and the end of the stud is against the end surface of the mobile locking seat opposite to the locking column.

2. The non-destructive locking shaft test tool for angular displacement potentiometer performance test according to claim 1, characterized in that: The non-destructive locking shaft test tooling for angular displacement potentiometer performance testing also includes a fixed locking seat, which is installed in the mounting groove through a vertical locking seat mounting screw, and the movable locking seat is located between the fixed locking seat and the locking hole. The fixed locking seat is provided with a transverse screw hole and the locking screw is installed in the screw hole.

3. The non-destructive shaft locking test tool for angular displacement potentiometer performance testing according to claim 2, characterized in that: A mounting groove, a fixed locking seat, a locking screw, a movable locking seat, a locking column, a locking hole and an axial hole together constitute a locking assembly, and the mounting seat extends outwardly around to form a mounting plate, and a plurality of locking assemblies are arranged on the mounting plate, and the plurality of locking assemblies are distributed in two rows and each row of the locking assemblies includes a plurality of locking assemblies arranged in sequence, and the two rows of locking assemblies are respectively close to the opposite side edges of the mounting plate.

4. The non-destructive shaft locking test tool for angular displacement potentiometer performance test according to any one of claims 1 to 3, characterized in that: The radial cross-sections of the locking hole and the locking column are both square.

5. The non-destructive shaft locking test tool for angular displacement potentiometer performance test according to any one of claims 1 to 3, characterized in that: A return compression spring is installed between a groove wall at one end of the installation groove close to the locking hole and the movable locking seat.

6. The non-destructive shaft locking test tool for angular displacement potentiometer performance test according to any one of claims 1 to 3, characterized in that: The locking column is a brass column.

Images