CN219084359U - Notebook computer rotating shaft testing device - Google Patents
Notebook computer rotating shaft testing device Download PDFInfo
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- CN219084359U CN219084359U CN202320134412.9U CN202320134412U CN219084359U CN 219084359 U CN219084359 U CN 219084359U CN 202320134412 U CN202320134412 U CN 202320134412U CN 219084359 U CN219084359 U CN 219084359U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The utility model relates to the technical field of notebook computer testing devices, in particular to a notebook computer rotating shaft testing device, which comprises a tray, a triaxial moving assembly and a testing assembly; the top surface of the tray is provided with a detection position for bearing a product to be detected; the three-axis moving assembly comprises an X-axis moving module, a Y-axis moving module and a Z-axis moving module, the X-axis direction is the same as the length direction of the tray, and the Y-axis direction is the same as the width direction of the tray; the testing component comprises a sliding block, a first measuring sensor, a second measuring sensor and a clamp, wherein the first measuring sensor, the second measuring sensor and the clamp are arranged on the sliding block, the first measuring sensor is used for moving along the X-axis direction with the sliding block and measuring the width of a product to be tested, and the second measuring sensor is used for moving along the Z-axis direction with the sliding block and measuring the height of the product to be tested. According to the technical scheme, automatic positioning can be completed, positioning operation is simple and quick, accuracy is high, and the notebook computer to be tested with different lengths and widths can be adapted, so that the notebook computer to be tested has better universality.
Description
Technical Field
The utility model relates to the technical field of notebook computer testing devices, in particular to a notebook computer rotating shaft testing device.
Background
In the development process of the notebook computer, the service life of the rotating shaft of the notebook computer needs to be tested, the test condition is that the real condition of switching the notebook computer by a person is simulated, and the test standard is that the notebook computer is generally opened and closed for 3 ten thousand times, and the rotating shaft is not damaged. Because of the repetitive mechanical action, an automated mechanism is used to conduct spindle life testing.
Currently, the common mechanisms are: the bottom surface of the notebook computer is fixed on the workbench, a driving rod of a motor on one side is connected with the computer screen through a clamp, and the driving rod and the clamp rotate, so that the computer screen is opened and closed.
However, in the above scheme, the positioning of the notebook computer must be completed manually, so that the accuracy is poor, and the operating efficiency is low; and the bearing stress condition can not be obtained in the test process.
Disclosure of Invention
In order to solve at least the technical problems in the prior art, the utility model provides a notebook computer rotating shaft testing device.
The utility model provides a notebook computer rotating shaft testing device which comprises a tray, a triaxial moving assembly and a testing assembly; the top surface of the tray is provided with a detection position for bearing a product to be detected; the three-axis moving assembly comprises an X-axis moving module, a Y-axis moving module and a Z-axis moving module, wherein the X-axis moving module is connected with the Z-axis moving module, the Z-axis moving module is connected with the Y-axis moving module, the Z-axis moving module is used for swinging along a set angle, the X-axis moving module is connected with the testing assembly and is positioned above the detection position, the X-axis direction is the same as the length direction of the tray, the Y-axis direction is the same as the width direction of the tray, and the Z-axis direction is perpendicular to the surface of the tray; the testing assembly comprises a sliding block, a first measuring sensor, a second measuring sensor and a clamp, wherein the first measuring sensor, the second measuring sensor and the clamp are arranged on the sliding block, the sliding block is connected with the X-axis moving module, the first measuring sensor is used for moving along the X-axis direction with the sliding block and measuring the width of a product to be tested, the second measuring sensor is used for moving along the Z-axis direction with the sliding block and measuring the height of the product to be tested, and the clamp is used for clamping the product to be tested.
In some embodiments, the device further comprises a torque measurement structure, wherein the torque measurement structure and the Z-axis moving module are respectively positioned at two sides of two broadsides of the tray, and the torque of the rotating shaft of the product to be measured is measured through the torque measurement structure.
In some embodiments, the tray further comprises a lifting module; the lifting module comprises a lifting sliding block, a lifting screw rod and a lifting motor, wherein the lifting sliding block is in threaded connection with the lifting screw rod, an output shaft of the lifting motor is connected with one end of the lifting screw rod, and the other end of the lifting screw rod is connected with the torque measuring structure.
In some embodiments, the X-axis movement module, the Y-axis movement module, and the Z-axis movement module are each a lead screw movement module; the sliding block is connected with the movable sliding block of the X-axis movable module, the X-axis movable module is connected with the movable sliding block of the Z-axis movable module, and the Z-axis movable module is connected with the movable sliding block of the Y-axis movable module.
In some embodiments, a first rotation driving motor is further arranged on the moving slide block of the Y-axis moving module, the Z-axis moving module is connected with an output shaft of the first rotation driving motor, and the Z-axis moving module, the X-axis moving module and the testing assembly are driven to rotate by the first rotation driving motor.
In some embodiments, the clamp comprises a first clamping jaw and a second clamping jaw, and the first clamping jaw and the second clamping jaw are respectively connected with a second rotation driving motor; the two second rotation driving motors respectively drive the first clamping jaw and the second clamping jaw to rotate between a first position and a second position, wherein the first clamping jaw and the second clamping jaw clamp a screen of a product to be detected when in the first position, and are separated from the screen of the product to be detected when in the second position.
In some embodiments, the first measurement sensor is an infrared distance detection sensor and the second measurement sensor is a pressure detection sensor.
In some embodiments, the infrared distance detection sensor is provided on a side wall of the slider, and the pressure detection sensor is connected to an end of the first jaw or the second jaw.
In some embodiments, positioning structures are respectively arranged on two sides of the tray, which are positioned at the detection position, and the product to be detected is fixed through the positioning structures; at least one positioning structure is in sliding connection with the tray and is used for adjusting the distance between the two positioning structures.
In some embodiments, the X-axis moving module has a moving range of 350 mm to 450 mm, the Y-axis moving module has a moving range of 400 mm to 500 mm, and the Z-axis moving module has a moving range of 350 mm to 450 mm.
When the notebook computer rotating shaft testing device is used, the testing component is driven to move through the triaxial moving component, the length and the width of a notebook computer to be tested are measured in the moving process, the midpoint position required to be clamped is determined, then the clamp is driven to clamp the midpoint position, and the opening and closing testing operation of the notebook computer to be tested is completed. According to the technical scheme, the positioning of the clamp is realized through multi-axis linkage, the automatic positioning can be completed in the mode, the positioning operation is simple and quick, the precision is high, the notebook computers to be tested with different lengths and widths can be adapted, and the universality is better.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present utility model will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present utility model are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
in the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
Fig. 1 is a front view of a testing device for a rotation shaft of a notebook computer according to an embodiment of the present utility model;
fig. 2 is a top view of a tray in a testing device for a rotation axis of a notebook computer according to an embodiment of the present utility model;
FIG. 3 is a side view of a testing device for a rotating shaft of a notebook computer according to an embodiment of the present utility model;
fig. 4 is a schematic diagram illustrating a swing state of a testing device for a rotation shaft of a notebook computer according to an embodiment of the present utility model.
In the figure:
1: a tray; 2: a product to be tested; 3: an X-axis moving module; 4: a Y-axis moving module; 5: a Z-axis moving module; 6: a slide block; 7: a first measurement sensor; 8: a clamp; 9: a torque measurement structure; 10: a lifting module; 11: a first rotary drive motor; 12: a second rotation driving motor; 13: and a positioning structure.
Detailed Description
In order to make the objects, features and advantages of the present utility model more comprehensible, the technical solutions according to the embodiments of the present utility model will be clearly described in the following with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment of the utility model provides a notebook computer rotating shaft testing device which comprises a tray, a triaxial moving assembly and a testing assembly. And placing the notebook computer to be tested on the tray, connecting the test assembly with the triaxial moving assembly, driving the test assembly to complete the test of the notebook computer under the drive of the triaxial moving assembly, testing the key position of the notebook computer to be tested, and finally clamping the midpoint position and performing rotation test operation of the rotating shaft.
The following describes each structure and connection relation of the notebook computer spindle testing device according to the embodiment of the present utility model with reference to the accompanying drawings.
As shown in fig. 1 to 3, a top surface of the tray 1 is provided with detection positions for carrying products 2 to be detected, and the tray 1 is a rectangular tray 1. For example, a damping layer is disposed on the detection position, and the damping layer can increase friction between the notebook computer and the detection position, so as to prevent the notebook computer from sliding off on the tray 1.
In the embodiment of the utility model, positioning structures 13 are respectively arranged on two sides of the tray 1, which are positioned at the detection positions, and the product 2 to be detected is fixed through the positioning structures 13; at least one positioning structure 13 is slidably connected to the tray 1 for adjusting the spacing between the two positioning structures 13.
For example, the positioning structure 13 includes a pressing plate screwed on the screw column, a set interval is provided between the pressing plate and the tray 1, and the notebook computer is positioned on the tray 1 by the pressing plate. For example, a bar-shaped through hole is arranged on the tray 1, and a threaded column is slidably connected in the bar-shaped through hole, so that the interval between the positioning structures 13 can be adjusted.
With continued reference to fig. 1 to 3, the triaxial moving assembly includes an X-axis moving module 3, a Y-axis moving module 4 and a Z-axis moving module 5, the X-axis moving module 3 is connected with the Z-axis moving module 5, the Z-axis moving module 5 is connected with the Y-axis moving module 4, and the Z-axis moving module 5 is configured to swing along a set angle, the X-axis moving module 3 is connected with the testing assembly and is located above the testing position, wherein the X-axis direction is the same as the length direction of the tray 1, the Y-axis direction is the same as the width direction of the tray 1, and the Z-axis direction is perpendicular to the surface of the tray 1.
The triaxial moving assembly is used for driving the testing assembly to automatically move and measuring and confirming the key position of the notebook computer to be measured. The specific operation mode is as follows:
in the embodiment of the utility model, the X-axis moving module 3, the Y-axis moving module 4 and the Z-axis moving module 5 are respectively screw moving modules; the screw rod module comprises a movable slide block, a movable slide rail, a screw rod and a driving motor, wherein the movable slide block is arranged on the movable slide rail and is in threaded connection with the screw rod, an output shaft of the driving motor is connected with the screw rod, and the movable slide block can reciprocate through forward rotation/overturning operation of the driving motor.
The slide block 6 of the test assembly is connected with the movable slide block of the X-axis movable module 3, the X-axis movable module 3 is connected with the movable slide block of the Z-axis movable module 5, and the Z-axis movable module 5 is connected with the movable slide block of the Y-axis movable module 4.
As shown in fig. 4, in the technical scheme of the present utility model, a first rotation driving motor 11 is further disposed on the moving slide block of the Y-axis moving module 4, and the Z-axis moving module 5 is connected to an output shaft of the first rotation driving motor 11, and the Z-axis moving module 5, the X-axis moving module 3 and the testing assembly are driven to rotate by the first rotation driving motor 11.
In the non-use state of the first rotation driving motor 11, the axis of the screw rod of the Z-axis moving module 5 and the axis of the screw rod of the Y-axis screw rod module are kept perpendicular to each other, in the use state, the driving testing assembly drives the notebook computer screen to complete opening and closing of 0-90 degrees or other set angles, and the set testing times are repeated.
In the embodiment of the utility model, the notebook computer rotating shaft testing device further comprises a torque measuring structure 9, the torque measuring structure 9 and the Z-axis moving module 5 are respectively positioned at two sides of two broadsides of the tray 1, and the rotating shaft torque of the product 2 to be tested is measured through the torque measuring structure 9.
For example, the pallet 1 further comprises a lifting module 10; the lifting module 10 comprises a lifting sliding block 6, a lifting screw rod and a lifting motor, wherein the lifting sliding block 6 is in threaded connection with the lifting screw rod, an output shaft of the lifting motor is connected with one end of the lifting screw rod, and the other end of the lifting screw rod is connected with the torque measuring structure 9.
When the notebook computer is opened and closed for testing operation, the position between the notebook computer and the tray 1 is relatively fixed in the opening and closing process of the screen, so that the torque born by the notebook computer is fed back to the lifting screw rod through the tray 1 and is further fed back to the torque measuring instrument through micro deformation, and the torque measuring instrument provides corresponding data for a tester so as to ensure the opening and closing health state.
With continued reference to fig. 1 to 3, the test assembly includes a slider 6, and a first measuring sensor 7, a second measuring sensor and a clamp 8 disposed on the slider 6, where the slider 6 is connected to the X-axis moving module 3, the first measuring sensor 7 is used to move along the X-axis direction with the slider 6 and measure the width of the product 2 to be tested, and the second measuring sensor is used to move along the Z-axis direction with the slider 6 and measure the height of the product 2 to be tested, and the clamp 8 is used to clamp the product 2 to be tested.
The test assembly is moved to the upper side of the notebook computer to be tested through the triaxial moving assembly, and then driven by the X-axis moving module 3, the test assembly is located above the notebook computer to be tested and moves back and forth along the X-axis direction, wherein in the moving process, the distance between the sensor and the surface of the tray 1 is continuously measured through the first measuring sensor 7. For example, the first measuring sensor 7 is an infrared distance detecting sensor provided on the side wall of the slider 6. The position of the midpoint of the X axis is determined by the change of the height difference, and specifically, the distance between the rest of the trays 1 and the distance between the rest of the trays and the surface of the notebook computer can be measured in the process that the infrared distance detection sensor moves along the X axis direction. And sending the data to a computer system, and deducing the midpoint position of the notebook computer along the X-axis direction according to the data value.
For example, the clamp 8 includes a first jaw and a second jaw, and the first jaw and the second jaw are respectively connected to the second rotation driving motor 12; the two second rotation driving motors 12 respectively drive the first clamping jaw and the second clamping jaw to rotate between a first position and a second position, wherein the first clamping jaw and the second clamping jaw clamp a screen of a product 2 to be tested in the first position, and are separated from the screen of the product 2 to be tested in the second position.
When the first clamping jaw and the second clamping jaw are at the first position, the clamp 8 clamps the screen of the product 2 to be tested, and at the moment, the first rotary driving motor 11 can be operated to realize the opening and closing operation of the screen of the notebook computer.
In the embodiment of the utility model, the second measuring sensor is a pressure detecting sensor, and the pressure detecting sensor is connected with the end part of the first clamping jaw or the second clamping jaw. When the height of the notebook computer is determined, the test assembly is firstly moved to the front end of the notebook computer to be tested through the three-axis moving assembly, the pressure detection sensor is connected with one side, facing the screen of the notebook computer, of the first clamping jaw or the second clamping jaw, the pressure sensor is positioned at the end part, the pressure detection sensor is in contact with the screen of the notebook computer under the driving of the Y-axis moving assembly, namely, a certain pressure value is generated, then the height of the test assembly is continuously lifted through the Z-axis moving assembly, the test assembly is moved through the Y-axis moving assembly at each height until the value measured by the pressure detection sensor is zero (namely, the pressure detection sensor is not in contact with the screen of the notebook computer at the moment), and the height is determined to be the height of the notebook computer to be tested.
After the height of the notebook computer to be tested is confirmed, the clamp 8 in the test assembly is driven to clamp the midpoint position through the triaxial moving assembly in combination with the midpoint position in the X-axis direction, and finally, under the action of the first rotary driving motor 11, the opening and closing test of the screen is carried out.
In the embodiment of the utility model, the moving range of the X-axis moving module 3 is 350 mm to 450 mm, the moving range of the Y-axis moving module 4 is 400 mm to 500 mm, and the moving range of the Z-axis moving module 5 is 350 mm to 450 mm.
Taking the notebook computer rotating shaft testing device as an example for completing the opening and closing test operation of a notebook computer, the description is given.
First, the screen of the notebook computer to be tested is opened to about 90 °, and placed on the tray 1, and fixed on the tray 1. The axle center of the first rotary driving motor 11 is aligned with the axle center of the rotating shaft of the notebook computer under the driving of the three-axis moving assembly, and the axle center is taken as a zero point. Then, under the effect of the triaxial moving assembly, the testing assembly is moved to the upper side of the notebook computer to be tested, the midpoint of the width direction of the notebook computer is measured through the X-axis moving module 3, the testing assembly is moved to the front of a screen of the notebook computer through the triaxial moving module, the top edge position of the height direction of the notebook computer is measured through the cooperation of the Z-axis moving module 5 and the Y-axis moving module 4, after the two positions are determined, the testing assembly is moved to the midpoint position of the top, and the screen of the notebook computer is clamped through the clamp 8.
The first rotation driving motor 11 is started to rotate reciprocally to finish the opening and closing test operation of the notebook computer, after the opening and closing operation of corresponding times is finished, the clamp 8 is started, the moving height is lifted to be separated from the screen of the notebook computer, and finally, the notebook computer is manually or manually taken away through a mechanical arm.
When the notebook computer rotating shaft testing device provided by the utility model is used, the testing component is driven to move through the triaxial moving component, the length and the width of a notebook computer to be tested are measured in the moving process, the midpoint position required to be clamped is determined, then the clamp 8 is driven to clamp the midpoint position, and the opening and closing testing operation of the notebook computer to be tested is completed. According to the technical scheme, the positioning of the clamp 8 is realized through multi-axis linkage, the automatic positioning can be completed in the mode, the positioning operation is simple and quick, the precision is high, the notebook computers to be tested with different lengths and widths can be adapted, and the universality is better.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. The notebook computer rotating shaft testing device is characterized by comprising a tray (1), a triaxial moving assembly and a testing assembly;
the top surface of the tray (1) is provided with a detection position for bearing a product (2) to be detected;
the three-axis moving assembly comprises an X-axis moving module (3), a Y-axis moving module (4) and a Z-axis moving module (5), wherein the X-axis moving module (3) is connected with the Z-axis moving module (5), the Z-axis moving module (5) is connected with the Y-axis moving module (4), the Z-axis moving module (5) is used for swinging along a set angle, the X-axis moving module (3) is connected with the testing assembly and is positioned above the testing position, the X-axis direction is the same as the length direction of the tray (1), the Y-axis direction is the same as the width direction of the tray (1), and the Z-axis direction is perpendicular to the surface of the tray (1);
the testing assembly comprises a sliding block (6), a first measuring sensor (7), a second measuring sensor and a clamp (8), wherein the first measuring sensor (7), the second measuring sensor and the clamp (8) are arranged on the sliding block (6), the sliding block (6) is connected with the X-axis moving module (3), the first measuring sensor (7) is used for moving along the X-axis direction with the sliding block (6) and measuring the width of a product (2) to be tested, the second measuring sensor is used for moving along the Z-axis direction with the sliding block (6) and measuring the height of the product (2) to be tested, and the clamp (8) is used for clamping the product (2) to be tested.
2. The notebook computer rotating shaft testing device according to claim 1, further comprising a torque measuring structure (9), wherein the torque measuring structure (9) and the Z-axis moving module (5) are respectively located at two sides of two broadsides of the tray (1), and the rotating shaft torque of the product (2) to be tested is measured through the torque measuring structure (9).
3. The notebook computer rotating shaft testing device according to claim 2, wherein the tray (1) further comprises a lifting module (10);
the lifting module (10) comprises a lifting sliding block, a lifting screw rod and a lifting motor, wherein the lifting sliding block is in threaded connection with the lifting screw rod, an output shaft of the lifting motor is connected with one end of the lifting screw rod, and the other end of the lifting screw rod is connected with the torque measuring structure (9).
4. The notebook computer rotating shaft testing device according to claim 1, wherein the X-axis moving module (3), the Y-axis moving module (4) and the Z-axis moving module (5) are respectively screw moving modules;
the sliding block (6) is connected with the movable sliding block of the X-axis movable module (3), the X-axis movable module (3) is connected with the movable sliding block of the Z-axis movable module (5), and the Z-axis movable module (5) is connected with the movable sliding block of the Y-axis movable module (4).
5. The notebook computer rotating shaft testing device according to claim 4, wherein a first rotating driving motor (11) is further arranged on the moving slide block of the Y-axis moving module (4), the Z-axis moving module (5) is connected with an output shaft of the first rotating driving motor (11), and the Z-axis moving module (5), the X-axis moving module (3) and the testing assembly are driven to rotate through the first rotating driving motor (11).
6. The notebook computer spindle testing apparatus according to claim 5, wherein the clamp (8) includes a first clamping jaw and a second clamping jaw, and the first clamping jaw and the second clamping jaw are respectively connected to a second rotation driving motor (12);
the two second rotation driving motors (12) respectively drive the first clamping jaw and the second clamping jaw to rotate between a first position and a second position, wherein the first clamping jaw and the second clamping jaw clamp a screen of a product (2) to be detected when in the first position, and are separated from the screen of the product (2) to be detected when in the second position.
7. The notebook computer spindle testing apparatus according to claim 6, wherein the first measuring sensor (7) is an infrared distance detecting sensor, and the second measuring sensor is a pressure detecting sensor.
8. The notebook computer rotating shaft testing device according to claim 7, wherein the infrared distance detection sensor is arranged on the side wall of the sliding block (6), and the pressure detection sensor is connected with the end part of the first clamping jaw or the end part of the second clamping jaw.
9. The rotating shaft testing device of a notebook computer according to any one of claims 1 to 8, wherein positioning structures (13) are respectively arranged on two sides of the tray (1) at the detection position, and the product (2) to be tested is fixed through the positioning structures (13);
at least one positioning structure (13) is in sliding connection with the tray (1) and is used for adjusting the distance between the two positioning structures (13).
10. The rotating shaft testing device for a notebook computer according to any one of claims 1 to 8, wherein the moving range of the X-axis moving module (3) is 350 mm to 450 mm, the moving range of the Y-axis moving module (4) is 400 mm to 500 mm, and the moving range of the Z-axis moving module (5) is 350 mm to 450 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320134412.9U CN219084359U (en) | 2023-01-12 | 2023-01-12 | Notebook computer rotating shaft testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320134412.9U CN219084359U (en) | 2023-01-12 | 2023-01-12 | Notebook computer rotating shaft testing device |
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| CN219084359U true CN219084359U (en) | 2023-05-26 |
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| CN202320134412.9U Active CN219084359U (en) | 2023-01-12 | 2023-01-12 | Notebook computer rotating shaft testing device |
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