Disclosure of Invention
The invention provides a positioning seat for an object to be measured, which can adjust the vertical axis of the object to be measured placed in the positioning seat.
The invention provides a torsion testing device which can effectively improve the testing precision.
The invention relates to a positioning seat for an object to be tested, which is suitable for a torsion testing device, wherein the torsion testing device comprises a testing table with a rotating disk, the positioning seat for the object to be tested is fixed on the rotating disk, the positioning seat for the object to be tested comprises a seat body and a plurality of spring pins, the seat body is provided with an upper surface and a plurality of side surfaces arranged around the upper surface, a positioning groove is concavely arranged on the upper surface, the positioning groove is provided with a bottom wall and a side wall surrounding the bottom wall, and the spring pins are arranged around the side wall at specific intervals in a mode of protruding to the center of the positioning groove.
In an embodiment of the invention, the base further has a plurality of air inlets correspondingly disposed on the side surface.
In an embodiment of the invention, the bottom wall of the positioning groove has a plurality of air outlet holes, and the air entering from the air inlet hole is exhausted from the air outlet holes.
In an embodiment of the invention, the pogo pins are disposed at the same level.
In an embodiment of the invention, the pogo pins are disposed around the sidewall at the same intervals.
The invention discloses a torsion testing device which comprises a testing platform, a vertical displacement connecting rod device, a motor, a rotating disc and an object to be tested positioning seat. The test bench is provided with a table board, and the vertical displacement connecting rod device with a first vertical axis is arranged on the test bench and is used for grabbing an object to be tested and moving the object to be tested along a vertical direction. The motor is arranged in the test board, and the rotating disc is arranged on the table board and can be driven by the motor to rotate. The object positioning seat is fixed in the rotating disc and comprises a seat body and a plurality of spring pins. The base body is provided with an upper surface and a plurality of side surfaces arranged around the upper surface, the upper surface is concavely provided with a positioning groove, the positioning groove is provided with a bottom wall and a side wall surrounding the bottom wall, the spring needle is arranged around the side wall at a specific interval in a mode of protruding to the center of the positioning groove, and when an object to be detected is placed in the positioning groove, the spring needle extends or retracts to enable a second vertical axis of the object to be detected to be coaxial with the first vertical axis.
In an embodiment of the invention, the base further has a plurality of air inlets correspondingly disposed on the side surface.
In an embodiment of the invention, the bottom wall of the positioning groove has a plurality of air outlet holes, and the air entering from the air inlet hole is exhausted from the air outlet holes.
In an embodiment of the invention, the pogo pins are disposed at the same level.
In an embodiment of the invention, the pogo pins are disposed around the sidewall at the same intervals.
In an embodiment of the invention, the vertical displacement link device includes a linear slide rail, a vertical displacement link unit, a torsion sensor, and a claw type clamping unit. The linear slide rail is arranged on the test board along the vertical direction, and the linear displacement connecting rod unit can move linearly along the linear slide rail. The torque sensor is arranged below the straight displacement connecting rod unit, and the claw type clamping unit is arranged below the straight displacement connecting rod unit and used for clamping an object to be detected.
In an embodiment of the invention, the claw clamping unit has a first spring force, and the pogo pin has a second spring force, and the second spring force is smaller than the first spring force.
In an embodiment of the invention, the motor is a dc servo motor.
In an embodiment of the invention, the torque testing apparatus further includes an eccentric correction type coupling connected between the motor and the rotating disk.
In an embodiment of the invention, the torsion testing apparatus further includes a display panel disposed on the testing platform.
In an embodiment of the invention, the object to be measured has a connecting wire, and the object-to-be-measured positioning seat has a wire-arranging groove communicated with the positioning groove, and the connecting wire is suitable for being placed in the wire-arranging groove.
In an embodiment of the invention, the rotating disk has a wire placing groove, and the connecting wire is further placed in the wire placing groove.
In an embodiment of the invention, the torsion testing apparatus further includes a wire fixing rod disposed on the rotation disk, and the connecting wire is limited in the fixing rod to avoid affecting the rotation testing operation.
Based on the above, the object positioning seat can adjust the position of the vertical axis of the object to be tested through the spring pin, so that when the object positioning seat is applied to the torsion testing equipment, the vertical axis of the object to be tested can be coaxial with the vertical axis of the vertical direction displacement connecting rod device, the testing error caused by the eccentricity between the product and the testing equipment is reduced, and the testing precision is effectively improved.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Detailed Description
FIG. 1 is a schematic diagram of a torsion testing apparatus of the present invention. Fig. 2 is a partial schematic view of the torsion testing apparatus of fig. 1, wherein fig. 2 omits the test station to clearly show the motor and the coupling. Fig. 3 is a schematic view of the dut positioning stand in fig. 1.
Referring to fig. 1, fig. 2 and fig. 3, the torsion testing apparatus 100 includes a testing platform 110, a vertical displacement link device 120, a motor 130, a rotating disc 140 and a positioning seat 150 for an object to be tested. The testing table 110 has a table 112. The vertical displacement link device 120 is disposed on the testing platform 110 for capturing an object (not shown) and moving the object along a vertical direction, wherein the vertical displacement link device 120 has a first vertical axis a 1. The motor 130 is disposed in the testing platform 110, and the rotating disk 140 is disposed on the platform 112, wherein the motor 130 is connected to the rotating disk 140, so that the rotating disk 140 can be driven by the motor 130 to rotate. The object-positioning base 150 is fixed in the rotating disc 140, and the object-positioning base 150 includes a base 152 and a plurality of pogo pins 154. The base 152 has an upper surface 1521 and a plurality of side surfaces 1522 disposed around the upper surface 1521, the upper surface 1521 is concavely disposed with a positioning slot 1523, the positioning slot 1523 has a bottom wall 1524 and a side wall 1525 surrounding the bottom wall 1524, the pogo pin 154 is disposed around the side wall 1525 at a specific interval in a manner of protruding toward the center of the positioning slot 1523, and when an object to be tested is placed in the positioning slot 1523, a second vertical axis a2 of the object to be tested is coaxial with the first vertical axis a1 by extension or retraction of the pogo pin 154.
It should be understood that the above "disposed around side wall 1525 at a certain interval" means that a plurality of pogo pins 154 may be disposed around side wall 1525 at the same interval; or may be disposed at different intervals around sidewall 1525; it is also possible that some of the pogo pins 154 are disposed around the side wall 1525 at the same intervals, and the remaining pogo pins 154 are disposed around the side wall 1525 at different intervals, but the present invention is not limited thereto.
In this embodiment, the pogo pins 154 are disposed around the side wall 1525 at equal intervals; however, in other embodiments, the spacing of the pogo pins 154 may be varied as desired.
By making the second vertical axis a2 of the object to be tested coaxial with the first vertical axis a1 of the vertical displacement link device 120, the eccentricity between the object to be tested and the vertical displacement link device 120 can be reduced, thereby improving the testing accuracy.
In detail, the vertical displacement link device 120 includes a linear slide rail 121, a vertical displacement link unit 122, a torsion sensor 123, and a claw type clamping unit 124. The linear slide rail 121 is disposed on the testing platform 110 along a vertical direction, wherein the linear displacement link unit 122 has the first vertical axis a1, and the linear slide rail 121 is parallel to the first vertical axis a 1. The straight displacement link unit 122 can vertically and linearly move along the linear slide rail 121 to drive the claw clamping unit 124 disposed below the straight displacement link unit 122 to relatively move away from or close to the rotating disk 140. The torque sensor 123 is disposed below the straight displacement link unit 122, and the claw clamping unit 124 disposed below the torque sensor 123 is used for clamping the object to be tested.
In this embodiment, the motor 130 disposed in the testing table 110 is a dc servo motor, and the torsion testing apparatus 100 further includes a coupling 160 connected between the motor 130 and the rotating plate 140. The coupling 160 can have eccentric calibration and anti-vibration functions. Additionally, the motor 130 may have a third vertical axis A3, and in a preferred embodiment of the present invention, the third vertical axis A3 is coaxial with the first vertical axis a 1.
In the present embodiment, the object to be tested is clamped by the claw clamping unit 124 having the clamping jaws capable of clamping objects with different shapes, such as circular, square or irregular shapes, so that the torsion testing apparatus 100 can be applied to various objects to be tested with different shapes, such as circular arc, flat and cylindrical, and accordingly, the positioning slot 1523 can be designed to correspond to the shape of the object to be tested by changing the shape of the sidewall 1525. Specifically, the positioning groove 1523 may be a disc shape, wherein the opening aperture O of the positioning groove 1523 is larger than the diameter D of the bottom wall 1524 of the positioning groove 1523, and the cross-sectional shape of the sidewall 1525 connecting between the bottom wall 1524 of the positioning groove 1523 and the upper surface 1521 of the seat body 152 is an arc shape.
As mentioned above, the base body 152 of the object positioning seat 150 has a plurality of air inlet holes 1526 correspondingly disposed on the side surface 1522, and the bottom wall 1524 of the positioning groove 1523 has a plurality of air outlet holes 1527, wherein the air entering from the air inlet holes 1526 is exhausted from the air outlet holes 1527. Through the arrangement of the air inlet holes 1526 and the air outlet holes 1527, after the object to be tested is correspondingly placed into the positioning slots 1523 by the claw-type clamping unit 124, the air discharged from the air outlet holes 1527 can provide the upward buoyancy of the object to be tested.
When the torque testing apparatus 100 of the present embodiment is used to perform a torque test on an object to be tested, an operator uses the claw type clamping unit 124 to clamp the object to be tested, and the claw type clamping unit 124 is similar to a clamping jaw of a doll-clamping machine. At this time, the second vertical axis a2 of the test object may be coaxial or non-coaxial with the first vertical axis a1 of the straight-direction displacement link unit 122.
Then, the vertical displacement link device 120 is opened, so that the straight displacement link unit 122 moves linearly on the linear slide rail 121, and the claw clamping unit 124 installed below the straight displacement link unit 122 approaches the rotating disk 140 along with the movement of the straight displacement link unit 122, and the object to be tested is placed in the positioning slot 1523 of the object positioning seat 150.
After the object is placed in the positioning slot 1523, the pogo pins 154 surrounding the side wall 1525 are extended or retracted according to the shape of the object. In the present embodiment, the pogo pins 154 are disposed at the same level; however, in other embodiments, the pogo pins 154 may be arranged in a staggered manner up and down according to the shape of the dut. Meanwhile, the object positioning seat 150 sucks the air from the air inlet 1526 of the seat body 152 and discharges the air from the air outlet 1527, so that the object does not directly contact the bottom wall 1524 of the positioning groove 1523 but floats in the positioning groove 1523.
In this way, the position of the object can be finely adjusted by extending or retracting each pogo pin 154, so that the second vertical axis a2 of the object is coaxial with the first vertical axis a1 of the straight-direction displacement link unit 122, and the object floats in the positioning slot 1523 in a stable state.
Incidentally, the claw clamping unit 124 of the present embodiment has a first spring force, and the pogo pin 154 has a second spring force, wherein the second spring force of the pogo pin 154 is smaller than the first spring force of the claw clamping unit 124. With such a design, the pogo pins 154 are retracted inward to fine-tune the position of the object under the condition that the claw type clamping unit 124 clamps the object with a large force, so that the second vertical axis a2 of the object is coaxial with the first vertical axis a1 of the straight-direction displacement link unit 122. On the contrary, if the second spring force of the pogo pin 154 is greater than the first spring force of the claw-type clamping unit 124, after the object enters the positioning slot 1523 and is abutted by the pogo pin 154, the pogo pin 154 exerts the first spring force greater than the second spring force of the claw-type clamping unit 124 on the object, which may cause the position of the object to be tested to shift, and the second vertical axis a2 of the object to be tested and the first vertical axis a1 cannot be coaxial, thereby reducing the accuracy of the torsion force measured by the torsion testing apparatus 100.
After the position of the object is calibrated by the pogo pin 154, the motor 130 drives the rotation disc 140 to rotate in a state that the second vertical axis a2 of the object is coaxial with the first vertical axis a1, and then the measured torque data is fed back by the torque sensor 123.
Ideally, the torque testing apparatus 100 should eliminate assembly tolerances, and therefore the third vertical axis A3 of the motor 130 should be coaxial with the first vertical axis a 1. In other words, the first vertical axis A1, the second vertical axis A2, and the third vertical axis A3 are coaxial. Therefore, the deviations of the first vertical axis a1, the second vertical axis a2, and the third vertical axis A3 can be reduced, and the testing accuracy can be improved effectively.
Furthermore, the linear movement of the linear displacement link unit 122 on the linear slide rail 121 can be controlled by the motor 130, and the claw clamping unit 124 is matched, so that the automatic testing operation can be realized, the testing stability of the torque testing device 100 is improved, the error caused by the operation of the operator is avoided, and the operation efficiency is improved.
In view of the above, the torque testing apparatus 100 may further include a display panel 170 disposed on the testing platform 110, wherein the display panel 170 may be used to display the information of the rotation speed, the rotation direction, the rotation times, the limit torque value, the torque curve, the torque distribution corresponding position diagram of each angle, the control parameters, and the like of the motor 130, so as to facilitate the engineering staff to adjust and control. In addition, the torque data values measured by the torque sensor 123 can also be displayed by the display panel 170, so that an operator can know abnormal points and perform statistical analysis on the torque distribution trend in real time, and the problem of uneven torque distribution of the product can be corrected conveniently.
It should be noted that when the object to be tested has a connection line, the connection line may be a cable line that enables the object to be tested to be electrically connected to other electronic devices, a wire arrangement groove 156 may be further disposed on the object to be tested positioning seat 150, the wire arrangement groove 156 is communicated with the positioning groove 1523, and the connection line may be placed in the wire arrangement groove 156.
Accordingly, if the cable is long, the cable cannot be completely received through the cable-arranging groove 156, the cable is further placed in the cable-placing groove 142 in a winding manner, and a cover plate is further provided to cover the cable-placing groove 142 of the rotating disk 140 in order to prevent the cable from floating due to the centrifugal force during the test; alternatively, the torsion testing apparatus 100 may further include a wire fixing rod 144 disposed on the rotation plate 140, and the connection wires can be limited in the wire fixing rod 144 to avoid affecting the rotation testing operation. The wire placing groove 142 and the wire fixing rod 144 can be alternatively arranged or simultaneously arranged, and are determined according to requirements.
In summary, the torsion testing apparatus of the present invention can adaptively correct the position of the object to be tested by applying the spring pin to the object positioning seat therein, so that the vertical axis of the object to be tested can be coaxial with the vertical axis of the vertical direction displacement link device of the torsion testing apparatus, thereby reducing the testing error caused by eccentricity and effectively improving the testing precision.
Moreover, the gas provides buoyancy to enable the object to be measured to float in the positioning groove, and the pogo pins are arranged at the same height, so that the pogo pins not only can well adjust the position of the object to be measured, but also can maintain the object to be measured in a stable state.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.