Torsion testing device for vehicle-mounted mobile phone support

Abstract

The invention provides a torsion testing device for a vehicle-mounted mobile phone support, and particularly relates to the technical field of torsion testing, the torsion testing device comprises a testing main machine body, a testing unit is configured on the testing main machine body, the testing unit comprises a testing table, at least two clamping jigs, a servo motor, a coupler and a torque sensor, and the torsion testing device further comprises a positioning auxiliary testing mechanism, by increasing or decreasing or replacing the high-density load blocks, the load working conditions of mobile phones with different weights can be simulated, various test requirements are met, the dovetail guide block is matched with the constraint spring, when the mobile phone rotates along with the positioning clamping arm, the spring can buffer sliding of the guide block, inertia shaking of the mobile phone rotating along with the support is restored, limitation of static load simulation is avoided, and the test efficiency is improved. Compared with the pure mechanical friction detection of the traditional torsion test, the test device adopts the dynamic load test which is closer to the real use, can obtain the torsion characteristic of the hinged part of the bracket under the load change, and provides direct and practical test data for the optimization of the bearing structure of the bracket.

Description

Technical Field

[0001] This invention provides a torque testing device for a vehicle-mounted mobile phone holder, specifically relating to the field of torque testing technology. Background Technology

[0002] The torque testing device for car phone holders is designed to test the torque performance of key components such as hinges. It uses mechanical sensors to collect torque data of the hinged parts of the phone holder during movement, thereby evaluating its structural stability and providing technical support for product development optimization and quality control.

[0003] In the prior art, patent application number 202223013949.4 discloses a torque testing device for a spherical universal joint of a car phone holder, including a base, a loading mechanism and a testing mechanism. The loading mechanism fixes the bracket and adjusts the angle through a steering wheel. The testing mechanism uses a servo motor and a torque sensor to detect the torque of the universal joint.

[0004] However, the device can only detect static torque at different angles and cannot simulate the dynamic load caused by the weight of the mobile phone, nor can it simulate the usage environment such as vehicle vibration and bumps. This results in the test data being out of touch with the real scene, making it difficult to reflect the torque changes of the bracket in actual use and unable to provide accurate data support for its load-bearing and vibration-resistant structural optimization.

[0005] Therefore, this invention proposes a torque testing device for vehicle-mounted mobile phone holders to overcome the shortcomings of existing technologies. Summary of the Invention

[0006] In view of the deficiencies of the existing technology, the present invention provides a torque testing device for a vehicle-mounted mobile phone holder, which can effectively solve the related technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a torque testing device for a vehicle-mounted mobile phone holder, including a main testing body, a testing unit configured on the main testing body, the testing unit including a testing table, at least two clamping fixtures, a side plate, a servo motor, a coupling, a torque sensor, and a positioning auxiliary testing mechanism; The positioning auxiliary testing mechanism includes a positioning component, a load component, a vibration simulation component, and a triggering component for holding the mobile phone holder tray; The test bench is located on the top surface of the test main body, and the clamping fixture is connected to multiple sets of threaded holes on the test bench through fasteners; The side plate is fixed to the top surface of the test host body, and the servo motor is installed on one side of the side plate; The torque sensor is mounted on the side plate, and the two ends of the torque sensor are connected to the coupling and the positioning assembly, respectively. The load assembly includes a dovetail guide plate, a dovetail guide block that slides within the dovetail guide plate, a constraint spring connecting the dovetail guide block and the groove wall of the dovetail guide plate, an external threaded shaft passing through the dovetail guide block, and at least one load block sleeved on the external threaded shaft.

[0008] Preferably, the dovetail guide plate is fixed on the outer wall of one of the positioning arms in the positioning assembly, and moves synchronously with the positioning arm, so that the rotation of the load assembly and the positioning arm are linked.

[0009] Preferably, the vibration simulation component includes a vibration table embedded inside the test bench and a central component electrically connected to the vibration table. The central component can independently control the start and stop of the vibration table and the vibration parameters.

[0010] Compared with the known prior art, the technical solution provided by this invention has the following beneficial effects: This torque testing device for in-vehicle phone holders can simulate the load conditions of phones of different weights by adding, removing, or replacing high-density load blocks, meeting diverse testing needs. The dovetail guide block and constraint spring work together to buffer the sliding of the guide block when the positioning clamp arm rotates, restoring the inertial sway of the phone as the holder rotates, avoiding the limitations of static load simulation. Compared with the simple mechanical friction detection of traditional torque testing, this testing device adopts dynamic load testing that is closer to real use, which can obtain the torque characteristics of the hinge part of the holder under load changes, providing direct and realistic test data for the optimization of the holder's load-bearing structure. The vibration simulation component enables accurate reproduction of the vehicle vibration environment. The piezoelectric vibration table can output vibrations of different frequencies and amplitudes according to the requirements, matching various vehicle scenarios such as urban roads and bumpy road sections. Through the shock-absorbing pad embedded in the test platform, it can effectively block the transmission of vibration to the main body, avoid interfering with the torque acquisition of the torque sensor, and ensure the accuracy of test data under vibration conditions. The triggering component works in conjunction with the vibration simulation component to simulate the scenario of a mobile phone holder experiencing discontinuous bumps in a vehicle. The cam rotates synchronously with the positioning shaft disk, and its arc-shaped protrusion intermittently touches the elastic contact switch. By controlling the on / off state of the switch, the vibration table is vibrated intermittently, thus reproducing the intermittent nature of vehicle bumps. This provides key test data for evaluating the stability of the holder in a real bumpy environment. Attached Figure Description

[0011] Figure 1 This is a front-view perspective view of the present invention. Figure 2 This is a partial three-dimensional structural diagram of the relevant components at the test platform in this invention; Figure 3This is a partial three-dimensional structural diagram of the relevant components at the positioning component in this invention; Figure 4 This is a partial exploded three-dimensional structural view of the relevant components at the positioning component in this invention; Figure 5 This is a partial three-dimensional structural diagram of the relevant components in the sectional state of the positioning shaft disk in this invention; Figure 6 This is a partial three-dimensional structural diagram of the relevant components at the positioning shaft disk in this invention; Figure 7 This is a partial three-dimensional structural diagram of the relevant components in the dovetail guide plate section state in this invention; Figure 8 This is a partial three-dimensional structural diagram of the relevant components at the triggering component in this invention; Figure 9 This is a partial three-dimensional structural diagram of the relevant components at the triggering component in this invention from another perspective.

[0012] The labels in the diagram represent: 1. Test the host unit; Test Unit: 11. Test stand; 12. Clamping fixture; 13. Side plate; 14. Servo motor; 15. Coupling; 16. Torque sensor; 2. Positioning auxiliary testing mechanism; 21. Positioning assembly; 211. Positioning shaft disc; 212. Twin guide groove; 213. Positioning clamping arm; 214. Fastening rod; 22. Load assembly; 221. Dovetail guide plate; 222. Dovetail guide block; 223. Constraint spring; 224. External threaded shaft; 225. Load block; 3. Vibration simulation components; 31. Vibration table; 32. Central components; 4. Triggering component; 41. Convex carrier plate; 42. Flexible contact switch; 43. Cam. Detailed Implementation

[0013] The present invention will be further described below with reference to embodiments.

[0014] Example 1: like Figures 1 to 7 As shown, a torque testing device for a car phone holder includes a test main body 1, on which a test unit is configured. The test unit includes a test platform 11, at least two clamping fixtures 12, a side plate 13, a servo motor 14, a coupling 15, and a torque sensor 16. It also includes a positioning auxiliary testing mechanism 2: the positioning auxiliary testing mechanism 2 includes a positioning component 21 and a load component 22 for holding the mobile phone holder tray.

[0015] Specifically, the test platform 11 is set on the top surface of the test main body 1, and the clamping fixture 12 is connected to multiple sets of threaded holes on the test platform 11 by fasteners; specifically, the clamping fixture 12 is a convex plate with holes at both ends, and fasteners, such as bolts, are inserted into the holes; by adjusting the installation position on the threaded holes of the test platform 11, it can be adapted to the base of mobile phone brackets of different lengths and specifications, and the base is stably fixed on the test platform 11 with the fasteners to prevent the bracket from shifting during the test.

[0016] The side plate 13 is fixed to the top surface of the test host body 1, and the servo motor 14 is installed on one side of the side plate 13. The torque sensor 16 is mounted on the side plate 13, and the two ends of the torque sensor 16 are connected to the coupling 15 and the positioning component 21 respectively. The side plate 13 is vertically erected on the top surface of one side of the test host body 1. The output shaft of the servo motor 14 and the one side shaft of the torque sensor 16 are coaxially connected through the coupling 15 to form a stable power transmission path.

[0017] The servo motor 14 can output alternating forward and reverse rotational power, which is transmitted to the positioning component 21 through the coupling 15 and torque sensor 16. This causes the mobile phone bracket holder held by the positioning component 21 to perform reciprocating flipping motion with its own hinge point as the fulcrum. During the power transmission process, the torque sensor 16 collects the torque value generated by the rotation of the hinge point of the mobile phone bracket in real time, and directly obtains the torque data during the test process.

[0018] The positioning assembly 21 includes a positioning shaft disk 211, two twin guide grooves 212 symmetrically opened on the end face of the positioning shaft disk 211, positioning clamping arms 213 respectively slidably embedded in the two twin guide grooves 212, and a bidirectional threaded rod 214 passing through the positioning shaft disk 211 and threadedly connected to the two positioning clamping arms 213; a handwheel is provided at the end of the bidirectional threaded rod 214, and the operator can drive the bidirectional threaded rod 214 to rotate by turning the handwheel.

[0019] Rotating the bidirectional threaded rod 214 can drive the two positioning clamping arms 213 to move closer to each other or further away from each other along the twin guide grooves 212 to clamp or release the support plate of the mobile phone holder. The positioning clamping arm 213 has anti-slip adhesive on its clamping surface to increase clamping friction and reduce wear on the phone holder plate.

[0020] The load block 225 can be used to simulate different load conditions by increasing or decreasing the number of load blocks or by changing to different weight specifications.

[0021] The load assembly 22 includes a dovetail guide plate 221, a dovetail guide block 222 slidably fitted within the dovetail guide plate 221, a constraint spring 223 connected between the dovetail guide block 222 and the groove wall of the dovetail guide plate 221, an external threaded shaft 224 passing through the dovetail guide block 222, and at least one load block 225 sleeved on the external threaded shaft 224. The load block 225 is made of high-density metal material, which reduces the volume while ensuring the load weight, and avoids the load assembly 22 occupying too much space and affecting the test operation.

[0022] Specifically, the dovetail guide plate 221 is fixed on the outer wall of one of the positioning clamping arms 213 in the positioning assembly 21, and moves synchronously with the positioning clamping arm 213, so that the rotation of the load assembly 22 and the positioning clamping arm 213 are linked.

[0023] Example 2: like Figure 8 As shown, the torque testing device for the vehicle-mounted mobile phone holder also includes a vibration simulation component 3. The vibration simulation component 3 includes a vibration table 31 embedded inside the test bench 11 and a central component 32 electrically connected to the vibration table 31. The embedded installation method does not change the external contour of the test bench 11, does not affect the clamping operation of the mobile phone holder, and ensures the overall practicality of the test device.

[0024] Specifically, the vibration table 31 adopts a piezoelectric vibrating plate structure, which is embedded in the mounting groove of the test table 11 through a shock-absorbing pad. The shock-absorbing pad can block the vibration of the vibration table 31 from being transmitted to the test host body 1, prevent the vibration from interfering with the torque data acquisition of the torque sensor 16, and ensure the test accuracy. The central component 32 integrates a power supply module, a control chip, and a vibration adjustment module. The power supply module provides working power to the vibration table 31, the control chip can preset parameters such as vibration frequency and amplitude, and the vibration adjustment module adjusts the working state of the vibration table 31 according to the instructions of the control chip, so as to independently control the start and stop of the vibration table 31 and the vibration parameters.

[0025] Example 3: like Figure 9 As shown, the torque testing device for the vehicle-mounted mobile phone holder also includes a trigger component 4; The triggering component 4 includes a convex carrier plate 41 fixed to the top surface of the test bench 11, an elastic contact switch 42 mounted on the top of the convex carrier plate 41, and a cam 43 coaxially sleeved on the shaft of the positioning shaft disk 211 in the positioning component 21 near the torque sensor 16. The cam 43 rotates synchronously with the positioning shaft disk 211. When the cam 43 rotates, its protruding part intermittently touches the elastic contact switch 42, and the elastic contact switch 42 transmits the trigger signal to the central component 32. In conjunction with the central component 32, the vibration table 31 achieves intermittent vibration to simulate the bumpy environment of a vehicle.

[0026] Specifically, the elastic contact switch 42 has its own elastic reset structure. When the protrusion of the cam 43 leaves, the elastic contact switch 42 can automatically reset and disconnect. It is electrically connected to the signal receiving end of the central component 32 through a wire, and can transmit the trigger signal to the central component 32 in real time. When the cam 43 rotates, its protruding part intermittently touches the elastic contact switch 42. The elastic contact switch 42 transmits a trigger signal to the central component 32, which, together with the central component 32, enables the vibration table 31 to vibrate intermittently, simulating the discontinuous bumps during vehicle operation. This is closer to actual usage scenarios and can detect the torsional stability of the hinge part of the phone holder under intermittent vibration, such as whether there are sudden torque changes or jamming due to intermittent vibration. In addition, the height of the convex carrier plate 41 can be adjusted according to the matching position of the elastic contact switch 42 and the cam 43 to ensure the contact accuracy between the elastic contact switch 42 and the cam 43, and ensure the working reliability of the trigger component 4.

[0027] As another implementation, the central component 32 independently controls the vibration table 31, allowing the testing device to achieve two testing modes: one is to perform torque testing under vibration environment alone, simulating the torque change of the mobile phone holder hinge when the vehicle is continuously vibrating; the other is to cooperate with the subsequent trigger component 4 to achieve intermittent vibration testing, enriching the diversity of testing scenarios and meeting different testing needs.

[0028] The usage and working principle of the above embodiments one to three are as follows: First, when using this torque testing device, place the base of the car phone holder on the test bench 11. According to the length specifications of the holder base, adjust the installation position of the two clamping fixtures 12 on the threaded holes of the test bench 11. Use the holes on both sides of the clamping fixtures 12 of the convex plate to insert bolts and other fasteners to stably fix the holder base on the test bench 11.

[0029] The operator then turns the handwheel at the end of the bidirectional threaded rod 214 to drive the bidirectional threaded rod 214 to rotate, which in turn drives the two positioning clamping arms 213 to move closer to each other along the twin guide grooves 212 until the clamping surfaces of the positioning clamping arms 213 are in contact with the mobile phone holder plate, and the plate is clamped by the anti-slip adhesive on the clamping surfaces.

[0030] After the servo motor 14 is started, its output alternating forward and reverse rotation power is transmitted to the positioning shaft disk 211 via the coupling 15 and torque sensor 16, driving the positioning clamping arm 213 and the bracket plate to reciprocate around the hinge point. The torque sensor 16 collects the torque data of the hinge point in real time. At the same time, the load component 22 fixed on the positioning clamping arm 213 rotates synchronously with the clamping arm, and the dovetail guide block 222 slides in the dovetail guide groove plate 211, with the constraint spring 223 buffering the sliding process. The operator can simulate the load conditions of different mobile phone weights by increasing or decreasing the number of load blocks 225 on the external threaded shaft 224 or replacing load blocks of different weights.

[0031] Based on Embodiment 1, when it is necessary to simulate torque testing under vehicle vibration conditions, the power module in the central component 32 supplies power to the piezoelectric vibration table 31. The control chip adjusts the working state of the vibration table 31 according to preset vibration parameters via the vibration adjustment module, causing the vibration table 31 to generate corresponding vibrations. The vibration table 31 is embedded in the mounting slot of the test platform 11 through a shock-absorbing pad, and its vibration directly acts on the mobile phone holder base fixed on the test platform 11, realizing torque testing under vibration conditions. The central component 32 can independently control the start / stop and vibration parameters of the vibration table 31. It can either independently turn on the vibration table 31 for continuous vibration testing or reserve an interface for cooperation with the subsequent trigger component 4, providing a basis for intermittent vibration testing.

[0032] Based on Embodiment 2, in conjunction with the trigger component 4, when the servo motor 14 drives the positioning shaft disk 211 to rotate, the cam 43, coaxially sleeved on the shaft, rotates synchronously with the positioning shaft disk 211. During rotation, the protruding part of the cam 43 intermittently touches the elastic contact switch 42. After being touched, the elastic contact switch 42 closes, transmitting the trigger signal to the signal receiving end of the central component 32 through the wire. After receiving the signal, the central component 32 controls the vibration table 31 to start vibration. When the protruding part of the cam 43 leaves the elastic contact switch 42, the elastic contact switch 42 disconnects due to its own elastic reset structure, the trigger signal is interrupted, and the central component 32 then controls the vibration table 31 to stop vibrating, thereby realizing the intermittent vibration of the vibration table 31.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A torsion testing device for a vehicle-mounted mobile phone holder, comprising a test main body (1), a test unit is arranged on the test main body (1), the test unit comprises a test table (11), at least two clamping jigs (12), a side stand (13), a servo motor (14), a coupling (15), and a torque sensor (16), characterized in that, further comprising a positioning auxiliary testing mechanism (2); the positioning auxiliary testing mechanism (2) comprises a positioning assembly (21) for clamping a mobile phone holder supporting plate, a load assembly (22), a vibration simulation assembly (3), and a triggering assembly (4); the test table (11) is arranged on the top surface of the test main body (1), and the clamping jigs (12) are connected to the test table (11) through fasteners and a plurality of threaded holes on the test table (11); the side stand (13) is fixed to the top surface area of the test main body (1), and the servo motor (14) is installed on one side of the side stand (13); the torque sensor (16) is assembled on the side stand (13), and the two end shafts of the torque sensor (16) are connected to the coupling (15) and the positioning assembly (21), respectively; wherein the load assembly (22) comprises a dovetail guide groove plate (221), a dovetail guide block (222) slidingly fitted in the dovetail guide groove plate (221), a constraint spring (223) connected between the dovetail guide block (222) and the groove wall of the dovetail guide groove plate (221), an external threaded shaft (224) passing through the dovetail guide block (222), and at least one load block (225) sleeved on the external threaded shaft (224).

2. The torsion test device for a vehicle-mounted mobile phone holder according to claim 1, characterized by, The positioning assembly (21) comprises a positioning shaft disc (211), two twin guide grooves (212) symmetrically arranged on the end surface of the positioning shaft disc (211), positioning clamping arms (213) slidingly fitted in the two twin guide grooves (212), respectively, and a bidirectional threaded rod (214) passing through the positioning shaft disc (211) and threadedly connected with the two positioning clamping arms (213). Rotating the bidirectional threaded rod (214) can drive the two positioning clamping arms (213) to move towards each other or away from each other along the twin guide grooves (212) to clamp or release the supporting plate of the mobile phone holder. The load blocks (225) can be increased or decreased in number or replaced with different weight specifications to realize simulation testing under different load conditions.

3. The torsion testing device for a vehicle-mounted mobile phone holder according to claim 2, characterized by, The dovetail guide groove plate (221) is fixed to the outer side wall of one of the positioning clamping arms (213) in the positioning assembly (21) and moves synchronously with the positioning clamping arm (213), so that the load assembly (22) is linked with the rotating action of the positioning clamping arm (213).

4. The torque testing device for a vehicle-mounted mobile phone holder according to claim 1, characterized in that, The clamping jigs (12) are adjusted in the installation position on the threaded holes of the test table (11) to adapt to the bases of mobile phone holders of different length specifications, and the bases are stably fixed on the test table (11) through fasteners to avoid displacement of the holder during testing.

5. The torsion testing device for a vehicle-mounted mobile phone holder according to claim 1, wherein The side stand (13) is vertically arranged on one side of the top surface of the test main body (1), the output shaft of the servo motor (14) is coaxially connected with one side shaft of the torque sensor (16) through the coupling (15), and a stable power transmission path is formed.

6. The torque testing device for a vehicle-mounted mobile phone holder according to claim 5, characterized in that, The servo motor (14) can output positive and negative alternating rotation power, which is transmitted to the positioning assembly (21) through the shaft coupling (15) and the torque sensor (16), and drives the mobile phone support bracket clamped by the positioning assembly (21) to make reciprocating overturning motion with the hinge part as the fulcrum.

7. The torsion testing device for a vehicle-mounted mobile phone holder according to claim 1, wherein The torque sensor (16) collects the torsion value generated by the hinge part of the mobile phone support during power transmission in real time, and directly obtains the torsion data during the test process.

8. The torque testing device for a vehicle-mounted mobile phone holder according to claim 1, characterized in that, The vibration simulation assembly (3) includes a vibration table (31) embedded in the test table (11) and a hub component (32) electrically connected to the vibration table (31), which can independently control the start-stop and vibration parameters of the vibration table (31).

9. The torsion testing device for a vehicle-mounted mobile phone holder according to claim 8, wherein The trigger assembly (4) includes a convex carrier plate (41) fixed on the top surface of the test table (11), an elastic contact switch (42) installed on the top of the convex carrier plate (41), and a cam (43) coaxially sleeved on the shaft body of the positioning shaft disc (211) near the torque sensor (16) on the positioning assembly (21). The cam (43) rotates synchronously with the positioning shaft disc (211).

10. The torsion testing device for a vehicle-mounted mobile phone holder according to claim 9, wherein When the cam (43) rotates, the convex part intermittently touches the elastic contact switch (42), and the elastic contact switch (42) transmits the trigger signal to the hub component (32), which cooperates with the hub component (32) to make the vibration table (31) realize intermittent vibration, simulating the vehicle bumping environment.

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