Service life testing device and service life testing method of holder rotating shaft

Abstract

The invention relates to the technical field of testing devices, in particular to a service life testing device and a service life testing method for a holder rotating shaft. The holder rotating shaft service life testing device comprises a carrying table, a driving assembly and a detection assembly. The carrying table is movably provided with a clamp used for clamping and fixing a projector. The driving assembly comprises a driving part, a pressing plate assembly and two pressing heads, the pressing plate assembly is provided with the two pressing heads at intervals in the width direction of the carrying table, and the driving part drives the pressing plate assembly to rotate in a reciprocating mode within the set angle range so that the two pressing heads can alternately press the front side and the rear side of the top end of the projector. The rotating center line of the pressing plate assembly and the holder rotating shaft are coaxially arranged. The detection assembly is installed on the pressing plate assembly and detects the pressure value of the projector at the specific swing times. According to the holder rotating shaft service life testing method, the holder rotating shaft service life of the projector is tested through the holder rotating shaft service life testing device, the real use working condition of the projector can be accurately simulated, and the holder rotating shaft service life testing accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a life testing device and a life testing method for a pan-tilt rotating shaft. Background Art

[0002] In the production and manufacturing process of projectors, as a key component that moves frequently, the life of the pan-tilt rotating shaft of the projector directly affects the overall performance and user experience of the projector.

[0003] The existing life testing device for the pan-tilt rotating shaft has a single testing method and cannot accurately simulate the rotation of the projector under actual working conditions, resulting in incomplete accurate test data. At the same time, after the detection components in the life testing device have been subjected to pressure tests for a long time and frequently, their sensitivity and performance will gradually decline, further reducing the accuracy and reliability of the test data, thereby reducing the accuracy of the life test of the pan-tilt rotating shaft. Summary of the Invention

[0004] The purpose of the present invention is to provide a life testing device and a life testing method for a pan-tilt rotating shaft to ensure the accuracy of test data and improve the accuracy of the life test of the pan-tilt rotating shaft.

[0005] To achieve this purpose, the technical solution adopted by the present invention is as follows:

[0006] A life testing device for a pan-tilt rotating shaft, used to test the life of the pan-tilt rotating shaft of a projector, the life testing device for the pan-tilt rotating shaft includes:

[0007] A carrier platform, on which a fixture for clamping and fixing the projector is movably arranged;

[0008] A driving component, the driving component includes a driving member, a pressing plate assembly and two pressing heads. The pressing plate assembly is provided with two pressing heads at intervals along the width direction of the carrier platform. The driving member is configured to drive the pressing plate assembly to reciprocally rotate within a set angle range, so that the two pressing heads respectively press the front and rear sides of the top of the projector alternately, thereby causing the projector to swing relative to the pan-tilt rotating shaft; the rotation center line of the pressing plate assembly is coaxially arranged with the pan-tilt rotating shaft;

[0009] A detection component, installed on the pressing plate assembly and detecting the pressure value of the projector at a specific number of swing times.

[0010] As an optional solution, a lifting platform is arranged on the carrier platform so as to be liftable in the height direction. A transmission shaft is rotatably arranged on the lifting platform. The driving member is arranged on the lifting platform and is in transmission connection with the transmission shaft; the transmission shaft is connected to the pressing plate assembly, and the axis of the transmission shaft is the rotation center line of the pressing plate assembly.

[0011] As an alternative, the driving assembly further includes a first rocker, a connecting rod, and a second rocker. One end of the second rocker away from the connecting rod is connected to the transmission shaft, and the output end of the driving member is connected to one end of the first rocker away from the connecting rod. Both ends of the connecting rod are rotatably connected to the first rocker and the second rocker respectively, so that the second rocker reciprocally rotates within the set angle range.

[0012] As an alternative, the lifting platform is provided with a counter, and the counter is located below the first rocker or the second rocker; the first rocker or the second rocker can trigger the counter when it rotates to one of the limit positions within the set angle range.

[0013] As an alternative, the carrier is provided with a vertical plate, and the vertical plate is provided with a sliding groove along the height direction;

[0014] The lifting platform is slidably arranged on the vertical plate along the height direction, and the lifting platform is provided with a locking hole communicating with the sliding groove;

[0015] An adjusting rod, the adjusting rod can slide along the sliding groove and penetrate into the locking hole to lock the relative positions of the vertical plate and the lifting platform.

[0016] As an alternative, the pressing plate assembly includes:

[0017] A first pressing plate, extending along the length direction of the carrier;

[0018] A second pressing plate, the second pressing plate extends along the width direction of the carrier and is arranged on the first pressing plate. The pressing heads are arranged at both ends of the second pressing plate along the width direction of the carrier, and the position of the second pressing plate is adjustable along the extending direction of the first pressing plate.

[0019] As an alternative, the detection assembly includes:

[0020] A third pressing plate, arranged on the pressing plate assembly;

[0021] A telescopic assembly, arranged on the third pressing plate;

[0022] A pressure sensor, the output end of the telescopic assembly is connected to the pressure sensor, so that the pressure sensor has a measurement position abutting against the top of the projector and an avoidance position away from the projector; when the projector rotates to the specific number of swing times, the pressure sensor moves from the avoidance position to the measurement position.

[0023] As an alternative, the fixture includes at least two clamping plates. Two of the clamping plates are provided at intervals along the length direction of the stage and / or two of the clamping plates are provided at intervals along the width direction of the stage. The two clamping plates provided at intervals in the same direction can approach each other to clamp the projector or move away from each other to release the projector.

[0024] A method for testing the service life of a pan-tilt rotating shaft. The service life of the pan-tilt rotating shaft of a projector is tested by the above-mentioned service life testing device for the pan-tilt rotating shaft. The method for testing the service life of the pan-tilt rotating shaft includes the following steps:

[0025] The fixture clamps and fixes the projector on the stage;

[0026] Adjust the position of the driving assembly along the height direction of the stage so that the rotation center line of the pressing plate assembly is coaxial with the pan-tilt rotating shaft, and the two pressing heads respectively abut against the front and rear sides of the top end of the projector;

[0027] The driving member is turned on and the number of swings of the projector is recorded;

[0028] The detection assembly detects the pressure value of the projector at a specific number of swings;

[0029] Judge whether the fluctuations of the pressure values detected by the detection assembly at least twice in a row exceed ±5%;

[0030] If so, it is determined that the pan-tilt rotating shaft has reached the service life.

[0031] As an alternative, judge whether the projector reaches the specific number of swings;

[0032] If so, the detection assembly moves to abut against the measurement position of the projector;

[0033] If not, the detection assembly moves to the avoidance position away from the projector.

[0034] The beneficial effects of the present invention are:

[0035] The life test device for the pan-tilt rotating shaft proposed by the present invention clamps and fixes the projector on the stage through a fixture, and a driving member drives the pressing plate assembly to reciprocally rotate within a set angle range, so that two pressing heads respectively press the front and rear sides of the top of the projector alternately, thereby causing the projector to swing relative to the pan-tilt rotating shaft, to simulate the actual use condition of the projector swinging around the pan-tilt rotating shaft, and the pressure value of the projector is obtained by a detection component detecting the pressure value at a specific number of swings. By accurately simulating the actual use condition of the projector swinging around the pan-tilt rotating shaft through the life test device for the pan-tilt rotating shaft, the accuracy of the test data obtained by the detection component is ensured, and the accuracy of the life test of the pan-tilt rotating shaft is improved. At the same time, the detection component only needs to detect the pressure value at a specific number of swings, without frequently detecting the pressure value of the projector, shortening the service life and use frequency of the detection component, avoiding the problem that the sensitivity and performance of the detection component rapidly decline, being beneficial to improving the accuracy of the test data, and further improving the accuracy of the life test of the pan-tilt rotating shaft.

[0036] The life test method for the pan-tilt rotating shaft proposed by the present invention tests the life of the pan-tilt rotating shaft of the projector through the above-mentioned life test device for the pan-tilt rotating shaft, which can not only accurately simulate the actual use condition of the projector swinging around the pan-tilt rotating shaft, ensure the accuracy of the test data obtained by the detection component, and improve the accuracy of the life test of the pan-tilt rotating shaft. At the same time, it is not necessary to frequently detect the pressure value of the projector, shortening the service life and use frequency of the detection component, avoiding the problem that the sensitivity and performance of the detection component rapidly decline, being beneficial to improving the accuracy of the test data, and further improving the accuracy of the life test of the pan-tilt rotating shaft. Description of the Drawings

[0037] Figure 1 is the structural exploded view of the projector and the pan-tilt bracket provided by the embodiment of the present invention;

[0038] Figure 2 is the first structural schematic diagram of the life test device for the pan-tilt rotating shaft provided by the embodiment of the present invention;

[0039] Figure 3 is the structural schematic diagram of the life test device for the pan-tilt rotating shaft with the projector clamped provided by the embodiment of the present invention;

[0040] Figure 4 is the second structural schematic diagram of the life test device for the pan-tilt rotating shaft provided by the embodiment of the present invention;

[0041] Figure 5 is the main flowchart of the life test method for the pan-tilt rotating shaft provided by the embodiment of the present invention.

[0042] The component names and reference numerals in the figures are as follows:

[0043] 10. Projector; 20. Pan-tilt bracket; 30. Pan-tilt rotating shaft;

[0044] 1. Carrier platform; 11. Vertical plate; 111. Slide groove; 12. Guide groove; 2. Clamp; 21. Clamping plate; 210. Mounting hole; 3. Driving assembly; 31. Driving member; 32. Pressing plate assembly; 321. First pressing plate; 322. Second pressing plate; 33. Pressing head; 34. First rocker; 35. Link rod; 36. Second rocker; 37. Transmission shaft; 4. Detection assembly; 41. Third pressing plate; 42. Pressure sensor; 5. Lifting platform; 6. Counter. Detailed implementation manner

[0045] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present invention will be further described below with reference to the drawings and through specific implementation manners. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, not all of them.

[0046] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0048] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", "left", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0049] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific embodiments.

[0050] Embodiment 1

[0051] As Figure 1 shown, in the operating condition of the projector 10, the projector 10 is installed on the pan-tilt bracket 20 and can reciprocally rotate around the pan-tilt axis 30 of the pan-tilt bracket 20 within a set angular range, so as to adjust the projection angle of the projector 10.

[0052] During the production and manufacturing process of the projector 10, the pan-tilt axis 30 of the projector 10, as a key component with frequent activities, its lifespan directly affects the overall performance and user experience of the projector 10. The existing lifespan testing devices for pan-tilt axes have a single testing method and cannot accurately simulate the rotation situation of the projector 10 in the actual operating condition, resulting in incomplete accurate test data. At the same time, after the detection components in the lifespan testing device have carried out pressure tests frequently for a long time, their sensitivity and performance will gradually decline, further reducing the accuracy and reliability of the test data, thereby reducing the precision of the lifespan test of the pan-tilt axis 30.

[0053] To solve the above problems, as Figure 2 and Figure 3 shown, this embodiment proposes a lifespan testing device for a pan-tilt axis, and this lifespan testing device for a pan-tilt axis is used to test the lifespan of the pan-tilt axis 30 of the projector 10. Specifically, the lifespan testing device for a pan-tilt axis includes a carrier 1, a driving component 3 and a detection component 4. A fixture 2 for clamping and fixing the projector 10 is movably arranged on the carrier 1. The driving component 3 includes a driving member 31, a pressing plate assembly 32 and two pressing heads 33. The pressing plate assembly 32 is provided with two pressing heads 33 at intervals along the width direction of the carrier 1 (the front-back direction in the figure). The driving member 31 is configured to drive the pressing plate assembly 32 to reciprocally rotate within a set angular range, so that the two pressing heads 33 alternately press the front and back sides of the top of the projector 10 respectively, thereby causing the projector 10 to swing relative to the pan-tilt axis 30. The rotation centerline of the pressing plate assembly 32 is coaxially arranged with the pan-tilt axis 30. The detection component 4 is installed on the pressing plate assembly 32 and detects the pressure value of the projector 10 at a specific number of swing times.

[0054] The projector 10 is clamped and fixed to the stage 1 by the fixture 2. The driving member 31 drives the pressing plate assembly 32 to reciprocally rotate within a set angle range, so that the two pressing heads 33 respectively press the front and rear sides of the top end of the projector 10 alternately, thereby causing the projector 10 to swing relative to the pan-tilt rotation shaft 30, to simulate the actual usage condition of the projector 10 swinging around the pan-tilt rotation shaft 30, and the detection assembly 4 detects the pressure value of the projector 10 at a specific number of swings, thereby obtaining the pressure value of the projector 10. The life test device of the pan-tilt rotation shaft accurately simulates the actual usage condition of the projector 10 swinging around the pan-tilt rotation shaft 30, ensuring the accuracy of the test data obtained by the detection assembly 4 and improving the accuracy of the life test of the pan-tilt rotation shaft 30. At the same time, the detection assembly 4 only needs to detect the pressure value at a specific number of swings, without frequently detecting the pressure value of the projector 10, shortening the usage duration and frequency of the detection assembly 4, avoiding the problem that the sensitivity and performance of the detection assembly 4 rapidly decline, being beneficial to improving the accuracy of the test data, and further improving the accuracy of the life test of the pan-tilt rotation shaft 30.

[0055] It should be noted that the fixture 2 clamps the projector 10 to the stage 1 by clamping and fixing the pan-tilt bracket 20 where the projector 10 is located. By adjusting the position of the driving assembly 3 in the height direction of the stage 1 (the up-down direction in the figure), the pressing heads 33 at the front and rear ends of the pressing plate assembly 32 respectively abut against the front and rear sides of the top end of the projector 10. When the driving member 31 drives the pressing plate assembly 32 to reciprocally rotate within a set angle range, the two pressing heads 33 respectively press the front and rear sides of the top end of the projector 10 alternately, causing the projector 10 to swing relative to the pan-tilt rotation shaft 30, to simulate the actual usage condition of the projector 10 swinging around the pan-tilt rotation shaft 30. By adjusting the rotation speed, rotation angle and number of rotations of the pressing plate assembly 32, it is possible to simulate the high-frequency and high-load accelerated aging scenario during the use of the pan-tilt rotation shaft 30.

[0056] During the actual test process, when the pressing plate assembly 32 reciprocally rotates once, the projector 10 reciprocally swings within a set angle range around the pan-tilt rotation shaft 30 once, defining one reciprocal swing of the projector 10. If the service life of the pan-tilt rotation shaft 30 is ten thousand reciprocal swings, the pressure value of the projector 10 can be detected once every one hundred swings. The above-mentioned detection assembly 4 can be signal-connected to an external PLC and a computer upper computer to transmit the detected pressure value. After receiving the actual pressure value, the PLC and the computer upper computer compare and analyze the change of the front and rear pressure data according to the life test cycle and specification requirements, to accurately judge the wear condition and performance change of the pan-tilt rotation shaft 30, and timely discover potential quality problems. For example, it can be set that if the fluctuation of the pressure value for ten consecutive times exceeds ±5%, an alarm is triggered and a fault report is generated. The life test device of the pan-tilt rotation shaft, by cooperating with the PLC and the computer upper computer, realizes the automatic collection, storage and analysis of data (pressure value), so as to generate a detailed test report.

[0057] As Figure 2 and Figure 4 shown, the stage 1 is provided with a lifting table 5 that can be lifted and lowered in the height direction. The lifting table 5 is rotatably provided with a transmission shaft 37. The driving member 31 is arranged on the lifting table 5 and is in transmission connection with the transmission shaft 37. The transmission shaft 37 is connected to the pressing plate assembly 32, and the axis of the transmission shaft 37 is the rotation center line of the pressing plate assembly 32. The lifting table 5 moves up and down along the height direction of the stage 1 to flexibly adjust the height of the transmission shaft 37 in the driving assembly 3, so as to ensure that the rotation center line of the pressing plate assembly 32 is coaxially arranged with the pan-tilt shaft 30, so as to truly simulate the actual use condition of the projector 10 swinging around the pan-tilt shaft 30.

[0058] Specifically, the stage 1 is provided with a vertical plate 11, and the vertical plate 11 is provided with a sliding groove 111 in the height direction. The lifting table 5 is slidably arranged on the vertical plate 11 in the height direction, and the lifting table 5 is provided with a locking hole communicated with the sliding groove 111. The adjusting rod can slide along the sliding groove 111 and pass through the locking hole to lock the relative positions of the vertical plate 11 and the lifting table 5. The adjusting rod can be a threaded rod, and the locking hole is a threaded hole. When the lifting table 5 is adjusted in place along the height direction of the stage 1, the threaded rod passes through the sliding groove 111 and then extends into the corresponding locking hole and is tightened to fix the lifting table 5 on the vertical plate 11. When it is necessary to adjust the height of the lifting table 5, only need to loosen the threaded rod. Through the sliding cooperation between the lifting table 5 and the vertical plate 11, the rapid lifting and lowering movement of the lifting table 5 along the height direction of the stage 1 is realized, and the height adjustment efficiency of the lifting table 5 is improved.

[0059] In this embodiment, two vertical plates 11 are arranged on the left side of the stage 1 and are oppositely arranged along the width direction of the stage 1. The lifting table 5 is in a plate shape and is clamped between the two vertical plates 11, which improves the stability and reliability of the height adjustment process of the lifting table 5. Each vertical plate 11 is provided with two sliding grooves 111 arranged at intervals along the length direction of the stage 1 (the left-right direction in the figure). The front and rear ends of the lifting table 5 are respectively provided with two locking holes, so that the front and rear ends of the lifting table 5 are locked and fixed by two adjusting rods, further improving the connection strength between the lifting table 5 and the vertical plate 11 and realizing the stable support of the driving assembly 3. In other embodiments, the number of the sliding grooves 111 and the locking holes can also be set to other numbers, which are not specifically limited here.

[0060] As Figure 2As shown in the figure, the driving assembly 3 further includes a first rocker 34, a connecting rod 35, and a second rocker 36. One end of the second rocker 36 away from the connecting rod 35 is connected to the transmission shaft 37, and the output end of the driving member 31 is connected to the end of the first rocker 34 away from the connecting rod 35. Both ends of the connecting rod 35 are rotatably connected to the first rocker 34 and the second rocker 36 respectively, so that the second rocker 36 reciprocally rotates within a set angle range. The above-mentioned first rocker 34, connecting rod 35, and second rocker 36 form a double-rocker mechanism, which is simple and reliable in structure, enabling the driving member 31 to drive the transmission shaft 37 and the pressing plate assembly 32 to reciprocally rotate within a set angle range through the double-rocker mechanism.

[0061] Specifically, the driving member 31 is a high-precision reduction motor. The output shaft of the high-precision reduction motor is connected to the end of the first rocker 34 away from the connecting rod 35. Through the coordinated control of the high-precision reduction motor and the above-mentioned PLC, the closed-loop control of the rotation speed, rotation angle, and rotation times of the projector 10 is realized, so as to simulate the high-frequency and high-load accelerated aging scenario of the pan-tilt rotating shaft 30 during actual use. The above-mentioned indenter 33 is made of a flexible material, such as rubber, silica gel, etc., to avoid damage to the projector 10 by the indenter 33.

[0062] As Figure 2 shown in the figure, the lifting table 5 is provided with a counter 6, and the counter 6 is located below the first rocker 34 or the second rocker 36. The first rocker 34 or the second rocker 36 can trigger the counter 6 when it rotates to one of the limit positions within a set angle range. The counter 6 has a simple structure and a small volume, which is convenient for installation and maintenance. At the same time, it can accurately record the reciprocating swing times of the projector 10. In this embodiment, the counter 6 is installed below the second rocker 36. When the second rocker 36 moves to the limit position (limit angle) within a set angle range, the second rocker 36 presses the contact piece of the counter 6 and triggers the counter 6, so that the counter 6 records once. In other embodiments, the counter 6 can also be installed below the first rocker 34 to trigger the counter 6 through the first rocker 34.

[0063] As Figure 3 and Figure 4As shown, the pressing plate assembly 32 includes a first pressing plate 321 and a second pressing plate 322. The first pressing plate 321 extends along the length direction of the stage 1. The second pressing plate 322 extends along the width direction of the stage 1 and is disposed on the first pressing plate 321. Pressing heads 33 are provided at both ends of the second pressing plate 322 along the width direction of the stage 1. The position of the second pressing plate 322 is adjustable along the extending direction of the first pressing plate 321. Specifically, the first pressing plate 321 includes a vertical portion and a horizontal portion that are connected to form an L shape. One end of the vertical portion is connected to the transmission shaft 37, and the other end of the vertical portion is connected to the horizontal portion. The horizontal portion is located directly above the projector 10 and is provided with a guide groove extending along the length direction of the stage 1. The second pressing plate 322 is provided with a plurality of through holes at intervals along the width direction of the stage 1. Fasteners such as screws pass through the guide groove and are selectively threadedly connected to different through holes to adjust the positions of the two pressing heads 33 along the length and width directions of the stage 1 to adapt to projectors 10 of different sizes.

[0064] As Figure 3 and Figure 4 shown, the detection assembly 4 includes a third pressing plate 41, a telescopic assembly, and a pressure sensor 42. The third pressing plate 41 is disposed on the pressing plate assembly 32. The telescopic assembly is disposed on the third pressing plate 41. The output end of the telescopic assembly is connected to the pressure sensor 42, so that the pressure sensor 42 has a measurement position where it abuts against the top end of the projector 10 and a retracted position where it is disengaged from the projector 10. When the projector 10 rotates to a specific number of swing times, the pressure sensor 42 moves from the retracted position to the measurement position. When the count of the counter 6 reaches a specific number of swing times, the telescopic assembly drives the pressure sensor 42 to descend to the measurement position. At this time, the pressure sensor 42 can contact the top end of the projector 10 and measure the pressure value received by the projector 10 when it rotates around the pan-tilt axis 30. After the measurement is completed, the telescopic assembly drives the pressure sensor 42 to rise to the retracted position, so that the pressure sensor 42 is disengaged from the projector 10, avoiding frequent detection of the pressure value of the projector 10 by the pressure sensor 42, shortening the service life and usage frequency of the pressure sensor 42, and preventing the sensitivity and performance of the pressure sensor 42 from decreasing too quickly, which is beneficial to improving the accuracy of the test data.

[0065] Specifically, the above telescopic assembly can be a structure of a motor and an electric push rod, and the pressure sensor 42 is installed on the electric push rod. The motor realizes the lifting movement of the pressure sensor 42 along the height direction of the stage 1 through the electric push rod, so as to switch between the retracted position and the measurement position. In other embodiments, the telescopic assembly can also be other driving components, as long as it can realize the switching of the pressure sensor 42 between the retracted position and the measurement position, and no specific limitation is made here.

[0066] The fixture 2 of this embodiment includes at least two clamping plates 21. Two clamping plates 21 are arranged at intervals along the length direction of the stage 1 and / or two clamping plates 21 are arranged at intervals along the width direction of the stage 1. The two clamping plates 21 arranged at intervals in the same direction can approach each other to clamp the projector 10 or move away from each other to release the projector 10. When the two clamping plates 21 arranged at intervals in the same direction approach each other, the two clamping plates 21 jointly clamp the opposite sides of the projector 10; when the two clamping plates 21 arranged at intervals in the same direction move away from each other, the projector 10 is released. By adjusting the position of the clamping plate 21 on the stage 1, the clamping size of the fixture 2 is adjusted, so as to adapt to projectors 10 of different sizes (models), improve the versatility of the life test device of the pan-tilt rotating shaft, and at the same time realize the quick clamping and disassembly of the projector 10, improving the test efficiency of the life test device of the pan-tilt rotating shaft.

[0067] As Figure 3 and Figure 4 shown, the fixture 2 includes four clamping plates 21, two of which are arranged at intervals along the length direction of the stage 1, and the other two clamping plates 21 are arranged at intervals along the width direction of the stage 1. Guide grooves 12 extending along the length direction and the width direction are respectively formed on the stage 1. The clamping plate 21 on the left side of the stage 1 is fixedly installed on the stage 1, and the clamping plate 21 on the right side of the stage 1 slides along two guide grooves 12 extending along the length direction of the stage 1 to approach or move away from the clamping plate 21 on the left side, so as to clamp or release the pan-tilt bracket 20 of the projector 10 along the length direction of the stage 1. The clamping plate 21 on the front side of the stage 1 slides along two guide grooves 12 extending along the width direction of the stage 1, and the clamping plate 21 on the rear side of the stage 1 slides along two guide grooves 12 extending along the width direction of the stage 1, so that the front and rear two clamping plates 21 approach or move away from each other to clamp or release the pan-tilt bracket 20 of the projector 10 along the width direction of the stage 1. By surrounding the pan-tilt bracket 20 of the projector 10 with the above four clamping plates 21 and clamping the pan-tilt bracket 20 in two directions respectively, the stable clamping of the projector 10 on the stage 1 is realized.

[0068] Specifically, two mounting holes 210 are formed on the clamping plate 21 at intervals. According to projectors 10 (pan-tilt brackets 20) of different sizes, after the four clamping plates 21 are adjusted in place, fasteners such as screws pass through the mounting holes 210 and the guide grooves 12 and are tightened with the lock nuts inside the stage 1 to realize the position adjustment of the clamping plate 21 along the length direction and the width direction of the stage 1, so as to clamp projectors 10 of different sizes.

[0069] Embodiment Two

[0070] As Figure 5As shown in the figure, this embodiment proposes a method for testing the lifespan of a pan-tilt rotating shaft. The lifespan of the pan-tilt rotating shaft of the projector 10 is tested through the lifespan testing device of the pan-tilt rotating shaft in Embodiment 1. The method for testing the lifespan of the pan-tilt rotating shaft includes the following steps:

[0071] The fixture 2 clamps and fixes the projector 10 on the stage 1.

[0072] Adjust the position of the driving component 3 in the height direction of the stage 1 so that the rotation center line of the pressing plate component 32 is coaxial with the pan-tilt rotating shaft 30, and the two pressing heads 33 respectively abut against the front and rear sides of the top of the projector 10.

[0073] The driving part 31 is turned on and the number of swings of the projector 10 is recorded.

[0074] The detection component 4 detects the pressure value of the projector 10 at a specific number of swings.

[0075] Judge whether the fluctuations of the pressure values detected by the detection component 4 at least twice in a row exceed ±5%;

[0076] If the fluctuations of the pressure values detected by the detection component 4 at least twice in a row exceed ±5%, it is determined that the pan-tilt rotating shaft 30 has reached its service life.

[0077] It should be noted that when the pan-tilt rotating shaft 30 is not worn or the wear amount is within the specified range, the pressure value of the projector 10 swinging around the pan-tilt rotating shaft 30 remains basically unchanged (or has small fluctuations). When the pan-tilt rotating shaft 30 is severely worn (not meeting the usage requirements), the pressure value of the projector 10 swinging around the pan-tilt rotating shaft 30 fluctuates greatly, and the fluctuation exceeds ±5%. At this time, it is determined that the pan-tilt rotating shaft 30 has reached its service life. In this embodiment, when the fluctuations of the pressure values detected by the detection component 4 ten times in a row exceed ±5%, it is determined that the pan-tilt rotating shaft 30 has reached its service life.

[0078] The method for testing the lifespan of the pan-tilt rotating shaft in this embodiment tests the lifespan of the pan-tilt rotating shaft 30 of the projector 10 through the above-mentioned lifespan testing device of the pan-tilt rotating shaft. It can not only accurately simulate the actual usage conditions of the projector 10 swinging around the pan-tilt rotating shaft 30, ensure the accuracy of the test data obtained by the detection component 4, and improve the accuracy of the lifespan test of the pan-tilt rotating shaft 30. At the same time, there is no need to frequently detect the pressure value of the projector 10, shortening the usage duration and frequency of the detection component 4, avoiding the problem of rapid decline in the sensitivity and performance of the detection component 4, being beneficial to improving the accuracy of the test data, and further improving the accuracy of the lifespan test of the pan-tilt rotating shaft 30.

[0079] Specifically, the projector 10 is placed on the right side of the stage 1, and the height of the left lifting platform 5 is adjusted so that the transmission shaft 37 is coaxial with the pan / tilt rotating shaft 30. Then, the positions of the four clamping plates 21 of the clamp 2 are adjusted to clamp the projector 10 together, and finally, the clamping plates 21 are fixed to the stage 1 by screws. The position of the pressure head 33 on the second pressure plate 322 is adjusted so that the two pressure heads 33 are respectively in contact with the front and rear sides of the top of the projector 10. At this time, when the pressure sensor 42 is in the measuring position, the pressure sensor 42 is in contact with the top of the projector 10.

[0080] When the driving member 31 is connected to the power supply and started, the driving member 31 drives the transmission shaft 37 and the pressure plate assembly 32 to swing within the set angle range, and the two pressure heads 33 press the front and rear sides of the top of the projector 10 alternately, so that the projector 10 swings relative to the pan-tilt rotating shaft 30, so as to simulate the actual use condition of the projector 10 swinging around the pan-tilt rotating shaft 30, and the number of swings is recorded by the counter 6. When the projector 10 reaches a specific number of swings, the telescopic assembly drives the pressure sensor 42 to move from the avoidance position to the measurement position, at which time the pressure sensor 42 contacts the top of the projector 10 and measures the pressure value of the projector 10 when it swings around the pan-tilt rotating shaft 30. When the measurement is completed, the telescopic assembly drives the pressure sensor 42 to rise to the avoidance position so that the pressure sensor 42 is out of contact with the projector 10, and each measurement value is presented in real time on the display screen of the stage 1. For example, when the service life of the pan-tilt rotating shaft 30 is 10,000 swings, it can be set to detect the pressure value once every 100 swings, and the counter 6 accumulates the count and automatically stops the test when the count reaches 10,000.

[0081] Furthermore, it is determined whether the projector 10 has reached a specific number of swings. If the projector 10 has reached a specific number of swings around the pan-tilt shaft 30, the detection component 4 moves to a measuring position abutting against the projector 10; if the projector 10 has not reached a specific number of swings around the pan-tilt shaft 30, the detection component 4 moves to a evasive position away from the projector 10. Through the above arrangement, the detection component 4 only needs to detect the pressure value at a specific number of swings, and does not need to frequently detect the pressure value of the projector 10, which shortens the use time and frequency of the detection component 4, avoids the problem of rapid decline in the sensitivity and performance of the detection component 4, is conducive to improving the accuracy of the test data, and further improves the accuracy of the life test of the pan-tilt shaft 30.

[0082] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A life test device for a pan / tilt rotating shaft, used for testing the life of a pan / tilt rotating shaft (30) of a projector (10), characterized in that: The life test device of the pan / tilt rotating shaft comprises: A carrier (1), on which a clamp (2) for clamping and fixing the projector (10) is movably provided; A driving assembly (3), the driving assembly (3) comprising a driving member (31), a pressure plate assembly (32) and two pressure heads (33), the pressure plate assembly (32) being provided with two pressure heads (33) at intervals along the width direction of the carrier (1), the driving member (31) being configured to drive the pressure plate assembly (32) to reciprocate within a set angle range, so that the two pressure heads (33) respectively and alternately press the front and rear sides of the top of the projector (10), thereby causing the projector (10) to swing relative to the pan-tilt rotating shaft (30); the rotation center line of the pressure plate assembly (32) is coaxially arranged with the pan-tilt rotating shaft (30); A detection component (4) is installed on the pressure plate component (32) and detects the pressure value of the projector (10) at a specific number of swings.

2. The life test device of the pan / tilt shaft according to claim 1, characterized in that: The carrier (1) is provided with a lifting platform (5) which can be raised and lowered in the height direction; the lifting platform (5) is rotatably provided with a transmission shaft (37); the driving member (31) is provided on the lifting platform (5) and is transmission-connected to the transmission shaft (37); the transmission shaft (37) is connected to the pressure plate assembly (32); the axis of the transmission shaft (37) is the rotation center line of the pressure plate assembly (32).

3. The life test device of the pan / tilt shaft according to claim 2, characterized in that: The driving assembly (3) further comprises a first rocking arm (34), a connecting rod (35) and a second rocking arm (36); one end of the second rocking arm (36) away from the connecting rod (35) is connected to the transmission shaft (37); the output end of the driving member (31) is connected to one end of the first rocking arm (34) away from the connecting rod (35); two ends of the connecting rod (35) are rotatably connected to the first rocking arm (34) and the second rocking arm (36), respectively, so that the second rocking arm (36) reciprocates within the set angle range.

4. The life test device of the pan / tilt shaft according to claim 3, characterized in that: The lifting platform (5) is provided with a counter (6), and the counter (6) is located below the first rocking arm (34) or the second rocking arm (36); the first rocking arm (34) or the second rocking arm (36) can trigger the counter (6) when it rotates to one of the extreme positions within the set angle range.

5. The life test device of the pan / tilt shaft according to claim 2, characterized in that: The carrier (1) is provided with a vertical plate (11), and the vertical plate (11) is provided with a sliding groove (111) along the height direction; The lifting platform (5) is slidably arranged on the vertical plate (11) along the height direction, and the lifting platform (5) is provided with a locking hole connected to the sliding groove (111); An adjusting rod, wherein the adjusting rod can slide along the sliding groove (111) and pass through the locking hole to lock the relative position of the vertical plate (11) and the lifting platform (5).

6. The life test device for a pan / tilt rotating shaft according to any one of claims 1 to 5, characterized in that: The pressure plate assembly (32) comprises: A first pressing plate (321) extending along the length direction of the carrier (1); A second pressing plate (322), the second pressing plate (322) extends along the width direction of the carrier (1) and is arranged on the first pressing plate (321), the pressing heads (33) are arranged at both ends of the second pressing plate (322) along the width direction of the carrier (1), and the position of the second pressing plate (322) along the extension direction of the first pressing plate (321) is adjustable.

7. The life test device for a pan / tilt shaft according to any one of claims 1 to 5, characterized in that: The detection component (4) comprises: A third pressing plate (41), arranged on the pressing plate assembly (32); A telescopic assembly, arranged on the third pressing plate (41); A pressure sensor (42), wherein the output end of the telescopic component is connected to the pressure sensor (42), so that the pressure sensor (42) has a measuring position abutting against the top of the projector (10) and an avoidance position detached from the projector (10); when the projector (10) rotates to the specific number of swings, the pressure sensor (42) moves from the avoidance position to the measuring position.

8. The life test device for a pan / tilt shaft according to any one of claims 1 to 5, characterized in that: The clamp (2) comprises at least two clamps (21), the carrier (1) is provided with two clamps (21) at intervals along the length direction and / or the carrier (1) is provided with two clamps (21) at intervals along the width direction, and the two clamps (21) arranged at intervals along the same direction can approach each other and clamp the projector (10) or move away from each other and release the projector (10).

9. A method for testing the life of a pan / tilt shaft, characterized in that: The life of a pan / tilt shaft (30) of a projector (10) is tested by using a pan / tilt shaft life testing device according to any one of claims 1 to 8, wherein the pan / tilt shaft life testing method comprises the following steps: The clamp (2) clamps and fixes the projector (10) on the carrier (1); The position of the driving assembly (3) along the height direction of the platform (1) is adjusted so that the rotation center line of the pressing plate assembly (32) is coaxial with the pan / tilt rotating shaft (30), and the two pressing heads (33) are respectively in contact with the front and rear sides of the top of the projector (10); The driving member (31) is turned on and records the number of swings of the projector (10); The detection component (4) detects the pressure value of the projector (10) when the projector (10) swings a specific number of times; Determining whether the fluctuation of the pressure value detected by the detection component (4) for at least two consecutive times exceeds ±5%; If so, it is determined that the pan / tilt rotating shaft (30) has reached the end of its service life.

10. The life test method of the pan / tilt shaft according to claim 9, characterized in that: determining whether the projector (10) has reached the specific number of swings; If so, the detection component (4) moves to a measuring position abutting against the projector (10); If not, the detection component (4) moves to an evacuation position away from the projector (10).

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