Torsion test process for a rotating shaft structure

Abstract

The application relates to a torsion test process of a rotating shaft structure, which comprises the following steps: S1, preliminary measurement; S2, screening; S3, running-in; and S4, re-measurement. On one hand, the application is suitable for the detection of rotating shaft structures with any number of shaft cores, can automatically adjust and simulate the motion track of the rotating shaft structure under actual working conditions during the torsion test, and can accurately obtain the required measurement data, times, angles, running-in strength, torsion curve and other data, meanwhile, the rotating shaft structure is not damaged during the torsion test process, the test efficiency is effectively improved, the structure is simple, the implementation is convenient, and the cost is low; on the other hand, the measurement of the synchronism angle is carried out first, then the torsion is screened, and under the assistance of oiling and running-in, not only the accurate test performance is obtained based on the actual working condition, but also the test structure can be graded and collected according to the grades, the practicability is enhanced, and the different performance requirements can be met.

Description

Technical Field

[0001] This invention belongs to the field of testing technology, specifically relating to a torque testing process for a rotating shaft structure. Background Technology

[0002] A hinge structure is a connecting element that provides mutual conversion functions. It is mainly used between rotating parts and the base, for example, in the folding and unfolding of flexible screens in electronic devices.

[0003] Currently, existing hinge structure products generally include multiple shafts and left and right rotating arms sleeved on the left and right shafts. A torque wrap is typically set between the left and right rotating arms and the shafts to generate damping during the rotation of the left and right rotating arms relative to the shafts. After assembly, a torque test is required to confirm whether the torque of the assembled hinge structure meets product requirements. Chinese patent CN217237448U discloses a folding screen hinge torque testing machine, including a frame, a machine platform at the top of the frame, and three sets of identical testing mechanisms symmetrically arranged on the top of the machine platform. Each of the three testing mechanisms consists of a fixing mechanism and a rotational movement mechanism. A fixing block secures the product, a gripper mechanism fixes the other side rotating along the axis, and a torque sensor collects data. It can collect measurement data, test cycles, angles, break-in force, torque curves, and other data as needed.

[0004] However, the aforementioned folding screen hinge torque testing machine has the following technical defects: 1. When testing a rotating shaft structure product with multiple shaft cores, the rotation center of the rotating arms on both sides changes during the rotation process. Therefore, the trajectory formed is not a perfect circle. Thus, the above testing method cannot simulate the actual working conditions of the rotating shaft structure, and it is difficult to measure the actual required measurement data, such as the number of times, angle, running-in force, torque curve, etc. At the same time, it will also increase the damage rate of the rotating shaft structure.

[0005] 2. Generally, a product is tested only once, with particular emphasis on synchronicity angle measurement and torque. However, some products require lubrication and break-in after assembly to more closely resemble actual working conditions. Only under these conditions can accurate data be obtained. Therefore, a single test cannot accurately determine the performance of the shaft structure, nor can it classify the product according to the test structure (since the original test only distinguishes between pass and fail). In other words, it is impossible to select products based on the upper, middle, and lower limits of the tested good products for use in different product requirements. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a novel torque testing process for a rotating shaft structure.

[0007] To solve the above technical problems, the present invention adopts the following technical solution: A torque testing process for a rotating shaft structure, the rotating shaft structure including a shaft core, a left rotating arm, and a right rotating arm, wherein there are multiple shaft cores and multiple gears synchronously drive the left and right rotating arms. The torque testing equipment used in the torque testing process includes a machine base with an initial testing station, a break-in station, a retesting station, and a receiving station; a torsion mechanism corresponding to each station and capable of clamping the left and right rotating arms for torsion testing; and a transfer robot. The torsion mechanism includes a first clamping part and a second clamping part. The torque testing process includes the following steps: S1, Initial Test; The transfer robot inserts the rotating shaft structure into the first and second clamping parts of the initial measurement station. The second clamping part and the first clamping part move relative to each other, and the inserted rotating arm moves with the movement of the second clamping part and generates relative sliding to perform image detection, so as to realize the measurement of the synchronous angle of the product in different postures and remove products that do not meet the measurement standards. S2, Screening After the initial test is completed, the shaft structure is lubricated. After the lubrication is complete, the torque is tested using the aforementioned torsion mechanism to screen out shaft structures with torque below the set lower limit. S3, Break-in period Next, the selected shaft structure is inserted from the left and right rotating arms into the first and second clamping parts in the running-in position, and the torsion action is repeatedly tested to remove burrs and evenly distribute grease to complete the running-in of the shaft structure. S4, Retest After the break-in process, the shaft structure is inserted from the left and right rotating arms into the first and second clamping parts at the retesting station. The torsional action is repeatedly tested to obtain the torque performance of the shaft structure. The shaft structure is classified as qualified or unqualified based on the torque performance. Among the qualified shafts, the shafts are further graded based on the torque performance. S5, Receiving Materials By using a transfer robot, products of different grades are loaded into the carrier to complete the grade-based material collection.

[0008] Preferably, in S1, the measurement of the synchronization angle is compared by taking a picture or video.

[0009] Preferably, in S4, the screening of good and bad products is completed based on the curve formed by the measured torque, and the upper, middle and lower limits of the good products are screened.

[0010] According to a specific embodiment and preferred aspect of the present invention, the first clamping part includes a torsion positioning platform and a first clamping block mounted on the torsion positioning platform, wherein the first clamping block has a first clamping groove that matches the left rotating arm, and the left rotating arm is inserted into the first clamping groove from top to bottom; the right rotating arm is inserted into the second clamping part from top to bottom.

[0011] Preferably, the second clamping part includes a rotating seat, a second clamping block disposed on the rotating seat, a driving component for driving the rotating seat to move around the vertical center line of the torsion positioning platform, and a resetting component. The second clamping block has a second clamping groove that slides and matches the right rotating arm, and the right rotating arm is inserted into the second clamping groove from top to bottom.

[0012] According to a specific embodiment and preferred aspect of the present invention, the rotating seat includes an annulus rotating about the torsional positioning platform, a fixed seat fixed to one side of the annulus, and a follower seat slidably disposed on the fixed seat along the tangential direction of the annulus. The second clamping block is slidably disposed on the follower seat along the radial direction of the annulus. The reset member is inserted into the follower seat to maintain the tendency of the moving part of the second clamping block to slide into the follower seat. When the annulus rotates, the follower seat and the second clamping block rotate synchronously, and the follower seat and the second clamping block slide relative to the right rotating arm.

[0013] Preferably, when the torsion mechanism at each station is in its initial position, the first clamping groove and the second clamping groove are aligned; when the torsion mechanism is in its test limit position, the first clamping groove and the second clamping groove are relatively close together. Here, the rotating shaft structure is tested between its ultimate expansion and ultimate contraction, wherein when the rotating shaft structure is at its ultimate expansion, the first clamping groove and the second clamping groove are aligned; when the rotating shaft structure is at its ultimate contraction, the first clamping groove and the second clamping groove are relatively close together.

[0014] According to a specific embodiment and preferred aspect of the present invention, both the first and second clamping grooves are recessed inward from their top and end surfaces, forming notches with groove bottom surfaces. The groove bottom surfaces of the first and second clamping grooves are flush, and when the rotating shaft structure is inserted, the bottom of the shaft core is located above the torsion positioning platform. This notch design ensures that the rotation center remains parallel to the shaft core, improving the accuracy of measurement data; it also prevents motion interference between the rotating shaft structure and the torsion positioning platform from affecting the torsion.

[0015] According to another specific embodiment and preferred aspect of the invention, an insertion hole is formed on the follower seat, the second clamping block is strip-shaped, with a second clamping groove formed at one end and a moving part formed at the other end, wherein an abutting portion is formed between the moving part and the second clamping groove, and a reset member is used to maintain the abutting portion against the follower seat. Here, when the second clamping block is held in its initial position before loading, precise positioning of the rotating shaft structure is achieved.

[0016] Preferably, the reset component includes a fixed post that extends vertically between the contact portion and the second clamping groove, a vertical post that is disposed on the follower seat, and tension springs that are respectively connected at both ends to the fixed post and the vertical post.

[0017] In some specific embodiments, the fixed post and the upright post are arranged in parallel, and the tension spring is arranged radially along the annulus. Here, the radially extending tension spring allows the second clamping block to slide more smoothly along the direction of the insertion hole, so as to avoid generating a motion component force that would affect the acquisition of torque.

[0018] According to another specific embodiment and preferred aspect of the present invention, a slide rail extending along the tangential direction of the annulus is formed on the fixed base, and the follower base is slidably disposed on the slide rail. Here, the torque test is performed by tangential movement and sliding of the second clamping block, avoiding damage to the rotating shaft structure, and also obtaining the required torque data more accurately. In some specific embodiments, the slide rail used is a linear rail with an I-shaped cross-section.

[0019] According to another specific embodiment and preferred aspect of the present invention, the driving component includes a power disk, a transmission belt for drivingly connecting the power disk to the annular body, and a sensor for monitoring the rotation angle of the annular body, wherein the power disk has anti-slip grooves formed in its circumferential direction, and the transmission belt has corresponding anti-slip protrusions that match the anti-slip grooves. That is, through the anti-slip fit, the rotation angle control of the annular body is implemented more accurately.

[0020] Preferably, the sensor is a position sensor and is located on the moving trajectory of the fixed base. There are at least two sets of position sensors, including one set corresponding to the initial position and one set corresponding to the test limit position. Generally, there are three, four, or more sets of position sensors, with two sets located at the initial and limit positions, and the other sets located on the moving path, used to monitor whether the annulus rotates normally.

[0021] According to another specific embodiment and preferred aspect of the invention, the torsion positioning platform includes a base, a central seat disposed on the base, and a torque sensor for acquiring the torque value of the rotating shaft structure during torsion. Here, the torque sensor can directly obtain torque test data.

[0022] Furthermore, the initial testing station and the retesting station are aligned from the ends to form the testing end, the receiving station forms the discharge end, and the running-in station is located between the testing end and the discharge end. This layout is compact, occupies little space, and facilitates the transfer and testing of torque.

[0023] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art: Existing torque testing methods cannot meet the performance testing requirements of shaft structures with multiple shaft cores. Furthermore, the trajectory formed by the changing rotation center of the rotating arms on both sides during rotation is not a perfect circle, failing to simulate the actual operating conditions of the shaft structure. It is also difficult to obtain the necessary measurement data, such as the number of tests, angles, break-in force, and torque curves. Additionally, a single test cannot accurately determine the performance of the shaft structure, nor can it classify the shaft according to its performance (as the original test only distinguishes between pass and fail). In other words, it cannot screen products based on the upper, middle, and lower limits of the measured good products for different product needs, resulting in poor practicality. This invention, however, cleverly solves these shortcomings by comprehensively designing the torque testing process. Using this torque testing process and equipment, the testing process involves preliminary testing, screening, break-in, retesting, and material collection. The preliminary testing removes products that do not meet the measurement standards for synchronous angles; screening primarily removes products with torque below the set lower limit; break-in removes burrs and evens out grease; and the retesting not only... The product is sorted into qualified and unqualified categories, and qualified products are graded according to their torque performance. The receiving process primarily uses a transfer robot to load products of different grades into a carrier frame for graded receiving. During the aforementioned torsion process, one of the left and right rotating arms is fixed while the other moves to achieve torque testing of the shaft structure. Therefore, compared with existing torque testing processes, this invention is applicable to the testing of shaft structures with any number of shaft cores. During torque testing, it can automatically adjust and simulate the motion trajectory of the shaft structure under actual working conditions to accurately acquire the required measurement data, such as the number of measurements, angles, break-in force, and torque curves. Simultaneously, the torsion test does not damage the shaft structure and effectively improves testing efficiency. The structure is simple, easy to implement, and low-cost. Furthermore, it first measures the angle synchronously, then performs torque screening, and with the assistance of lubrication and break-in, it not only obtains accurate test performance based on actual working conditions but also allows for graded classification and collection according to the test structure, enhancing practicality and meeting the needs of different performance requirements. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the rotating shaft structure involved in the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the torque testing device for the rotating shaft structure involved in the present invention; Figure 3 for Figure 2 Schematic diagram of a local structure in the middle; Figure 4 for Figure 2 Enlarged schematic diagram of a single torsion mechanism structure; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the process flow in this embodiment; The components are: 1. Machine base; 10. Initial measurement station; 100. Guide rail; 11. Break-in station; 12. Re-measurement station; 13. Receiving station; j. Gantry frame; j1. First track; j2. Second track; S. Transfer robot; S1. First transfer robot; S2. Second transfer robot; h. Recycling box; g. Discharge track; p. Carrier tray; 2. Torsion mechanism; 20. First clamping part; 200. Torsion positioning platform; a0. Base; a1. Center seat; a2. Torque sensor; 201. First clamping block; c1. First clamping groove; 21. Second clamping part; 210. Rotating seat; b1. Ring body; b2. Fixed seat body; b20. Slide rail; b3. Follower seat body; b30. Insertion hole; 211. Second clamping block; c2. Second clamping groove; d. Contact part; 212. Driving component; e0. Power plate; e1. Transmission belt; e2. Sensor; 213. Reset component; f0. Fixed column; f1. Column; f2. Tension spring; 3. Angle detection mechanism; 4. Oil injection mechanism; Z, rotating shaft structure; Z1, shaft core; Z2, left rotating arm; Z3, right rotating arm. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the application will be described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] like Figures 1 to 6As shown, the torque testing process for the shaft structure involved in this embodiment employs a torque testing device including a machine base 1, a torsion mechanism 2, an angle detection mechanism 3, and an oil injection mechanism 4. The shaft structure Z involved in this embodiment includes a shaft core Z1, a left rotating arm Z2 and a right rotating arm Z3 mounted on the shaft core Z1, wherein the shaft core Z1 has multiple shafts and multiple gears are used to synchronously drive the left rotating arm Z2 and the right rotating arm Z3.

[0032] Specifically, the top surface of the machine 1 has a preliminary measurement station 10, a break-in station 11, a retest station 12, and a receiving station 13. The preliminary measurement station 10 is used to measure the synchronicity angle and torque of the rotating shaft structure Z in stages. After the preliminary measurement is qualified, the machine is lubricated and enters the break-in station 11. After the break-in is completed, the machine enters the retest station 12. Finally, the qualified products that have completed the retest enter the receiving station 13.

[0033] Simultaneously, the initial testing station 10 and the retesting station 12 are aligned from the ends to form the testing end, the receiving station 13 forms the discharge end, and the running-in station 11 is located between the testing end and the discharge end. Specifically, the initial testing station 10 and the retesting station 12 are arranged side by side in the front-back direction, the running-in station 11 is located to the right of the initial testing station 10 and the retesting station 12, and the receiving station 13 is located to the right of the running-in station 11. The machine base 1 is also equipped with a gantry j and a transfer robot S. The gantry j includes a first track j1 and a second track j2. The first track j1 extends along the arrangement direction (i.e., the left-right direction) of the initial testing station 10, the running-in station 11, and the receiving station 13. The second track j2 is slidably connected to the first track j1 and extends along the arrangement direction (i.e., the front-back direction) of the initial testing station 10 and the retesting station 12. The transfer robot S The system includes a first transfer robot S1 and a second transfer robot S2. The first transfer robot S1 is located on the left side of the retesting station 12. The first transfer robot S1 is used to connect to the assembly line of the rotating shaft structure and transfer the assembled rotating shaft structure to the machine platform 1. The second transfer robot S2 is slidably mounted on the second track j2. The second transfer robot S2 is used to move the rotating shaft structure sequentially between the initial test station 10, the break-in station 11, the retesting station 12, and the receiving station 13. The machine platform 1 is also equipped with multiple defective product recycling boxes h. Products that fail the initial test or retest are placed in the recycling boxes h by the second transfer robot S2. The receiving station 13 is equipped with a discharge track g and multiple trays p arranged side by side on the discharge track g. Products that pass the test are placed one by one on the trays p by the second transfer robot S2.

[0034] In this example, there are multiple torsion mechanisms 2, which are correspondingly distributed in the initial test station 10, the running-in station 11, and the retest station 12. In some specific embodiments, the initial test station 10 and the retest station 12 are each provided with a torsion mechanism 2, and the running-in station 11 is provided with multiple torsion mechanisms 2 distributed in a rectangular array.

[0035] Specifically, each torsion mechanism 2 includes a first clamping part 20 and a second clamping part 21.

[0036] The first clamping part 20 includes a torsion positioning platform 200 and a first clamping block 201 mounted on the torsion positioning platform 200. The torsion positioning platform 200 includes a base a0, a center seat a1 mounted on the base a0, and a torque sensor a2 for acquiring the torque value of the rotating shaft structure Z during torsion. The torque sensor a2 is of conventional technology. A first clamping groove c1 matching the left rotating arm Z2 is formed on the first clamping block 201, and the left rotating arm Z2 is inserted into the first clamping groove c1 from top to bottom. The second clamping part 21 includes a rotating seat 210, a second clamping block 211 mounted on the rotating seat 210, a driving component 212 for driving the rotating seat 210 to move around the vertical center line of the torsion positioning platform 200, and a reset component 213. A second clamping groove c2 slidingly matching the right rotating arm Z3 is formed on the second clamping block 211, and the right rotating arm Z3 is inserted into the second clamping groove c2 from top to bottom.

[0037] For ease of implementation, the first clamping groove c1 and the second clamping groove c2 are aligned; when the torsion mechanism 2 is in the test limit position, the first clamping groove c1 and the second clamping groove c2 are relatively close together. The first clamping groove c1 and the second clamping groove c2 are both recessed inward from the top surface and the end surface and form a notch with a groove bottom surface. The groove bottom surfaces of the first clamping groove c1 and the second clamping groove c2 are flush. When the rotating shaft structure Z is inserted, the bottom of the shaft core Z1 is located above the torsion positioning platform 200.

[0038] In this example, the rotating seat 210 includes an annular body b1 that rotates around the torsion positioning platform 200, a fixed seat b2 fixed to one side of the annular body b1, and a follower seat b3 that is slidably disposed on the fixed seat b2 along the tangential direction of the annular body b1; the second clamping block 211 is slidably disposed on the follower seat b3 along the radial direction of the annular body b1; the reset member 213 is inserted into the follower seat b3 to maintain the tendency of the moving part of the second clamping block 211 to slide into the follower seat b3. When the annular body b1 rotates, the follower seat b3 and the second clamping block 211 rotate synchronously, and the follower seat b3 and the second clamping block 211 slide relative to the right rotating arm Z3.

[0039] In some specific embodiments, a slide rail b20 extending along the tangent direction of the annular body b1 is formed on the fixed base b2. The slide rail is a linear rail with an I-shaped cross-section. The follower base b3 is slidably mounted on the slide rail b20. An insertion hole b30 is formed on the follower base b3. The second clamping block 211 is strip-shaped, with a second clamping groove c2 formed at one end and a moving part formed at the other end. An abutting part d is formed between the moving part and the second clamping groove c2. The reset member 213 maintains the tendency of the abutting part d to abut against the follower base b3. The drive component 212 includes a power disc e0, a transmission belt e1 for connecting the power disc e0 to the ring body b1, and a sensor e2 for monitoring the rotation angle of the ring body b1. The power disc e0 has an anti-slip groove in its circumferential direction, and the transmission belt e1 has corresponding anti-slip protrusions that match the anti-slip groove. The sensor e2 is a position sensor and is located on the moving trajectory of the fixed base b2. There are at least two sets of position sensors, including one set corresponding to the initial position and one set corresponding to the test limit position. Generally, there are three, four or more sets of position sensors, with two sets in the initial and limit positions and the other sets on the moving path, used to monitor whether the ring body b1 rotates normally. Considering the layout of the space of each station on the machine, the drive components 212 of the initial test station 10 and the retest station 12 are all driven by the above-mentioned external belt, while the drive components 212 of the break-in station 11 are all driven by the internal belt. The reset member 213 includes a fixed post f0 that is disposed between the contact part d and the second clamping groove c2 and extends vertically, a column f1 disposed on the follower seat b3, and a tension spring f2 whose two ends are respectively connected to the fixed post f0 and the column f1, wherein the fixed post f0 and the column f1 are arranged in parallel, and the tension spring f2 is arranged radially along the annulus b1.

[0040] In this example, the angle detection mechanism 3 is used for synchronous angle measurement of the rotating shaft structure, that is, to detect the rotation angle of the rotating shaft structure in different postures at the initial measurement station 10.

[0041] In some specific embodiments, the initial measurement station 10 is provided with a guide rail 100, and the corresponding torsion mechanism 2 is slidably disposed on the guide rail 100 and has a first position for initial measurement of the torque of the rotating shaft structure and a second position for connection with the angle detection mechanism 3. That is, the angle detection mechanism 3 is a detection camera disposed at one end of the guide rail 100, and the corresponding torsion mechanism 2 moves to one end of the guide rail 100 and is located below the lens of the detection camera to perform synchronous angle measurement; the re-measurement station 12 is located at the other end of the guide rail 100.

[0042] In addition, the oiling mechanism 4 is used to inject lubricating oil into the rotating shaft structure located at the initial measurement station 10. In some specific embodiments, the oiling mechanism 4 is an injection needle mounted on the first transfer robot S1, which grips the rotating shaft structure and injects lubricating oil through the injection needle.

[0043] Combination Figure 6 As shown, the torque testing process includes the following steps: S1, Initial Test The transfer robot inserts the rotating shaft structure into the first and second clamping parts of the initial measurement station. The second clamping part and the first clamping part move relative to each other, and the inserted rotating arm moves with the movement of the second clamping part and generates relative sliding to perform image detection, so as to realize the measurement of the synchronization angle of the product in different postures and reject products that do not meet the measurement standards. The measurement of the synchronization angle is carried out by taking pictures or videos with an industrial camera (CCD module) for comparison. S2, Screening After the initial test is completed, the shaft structure is lubricated. After the lubrication is complete, the torque is tested using the aforementioned torsion mechanism to screen out shaft structures with torque below the set lower limit. S3, Break-in period Next, the selected shaft structure is inserted from the left and right rotating arms into the first and second clamping parts in the running-in position, and the torsion action is repeatedly tested to remove burrs and evenly distribute grease to complete the running-in of the shaft structure. S4, Retest After the break-in process, the shaft structure is inserted from the left and right rotating arms into the first and second clamping parts at the retesting station. The torsional action is repeatedly tested to obtain the torque performance of the shaft structure. The shaft structure is classified as qualified or unqualified based on the torque performance. Among the qualified shafts, the shafts are graded according to the torque performance. The good shafts are further divided into upper, middle, and lower grades. S5, Receiving Materials By using a transfer robot, products of different grades are loaded into the carrier to complete the grade-based material collection.

[0044] In summary, after adopting this torque testing process and equipment, the testing process involves the following steps in sequence: initial testing, screening, break-in, retesting, and material collection. The initial testing removes products that do not meet the measurement standards for synchronicity angles. Screening primarily removes products with torque below the set lower limit. Break-in removes burrs and grease. The retest not only sorts products as qualified or unqualified but also grades qualified products according to their torque performance. Material collection primarily uses a transfer robot to load products of different grades into a carrier frame for graded collection. During the aforementioned torsion process, one of the left and right rotating arms is fixed while the other moves. To achieve torque testing of shaft structures, this invention, compared with existing torque testing processes, is applicable to the testing of shaft structures with any number of shaft cores. During torque testing, it can automatically adjust and simulate the motion trajectory of the shaft structure under actual working conditions to accurately acquire the required measurement data, such as the number of tests, angles, break-in force, and torque curves. Simultaneously, the torque test does not damage the shaft structure and effectively improves testing efficiency. It is simple in structure, easy to implement, and low in cost. Furthermore, it first synchronously measures the angle, then performs torque screening, and incorporates lubrication and break-in processes. The system not only provides accurate test performance based on actual working conditions, but also allows for graded classification and collection according to the test structure, enhancing practicality and meeting the needs of different performance requirements. Thirdly, it enables testing of the shaft structure between its maximum expansion and maximum contraction. When the shaft structure is at its maximum expansion, the first and second clamping slots are aligned; when the shaft structure is at its maximum contraction, the first and second clamping slots are relatively close together. Fourthly, the notch design not only keeps the rotation center parallel to the shaft core, improving the accuracy of measurement data, but also avoids motion interference between the shaft structure and the torsion positioning platform. The fifth aspect is that, with the cooperation of the reset part and the contact part, the second clamping block is kept in the initial position before loading, so as to achieve precise positioning of the rotating shaft structure; the sixth aspect is that, through the radially extending tension spring, the second clamping block slides more smoothly along the direction of the insertion hole, so as to avoid generating motion component force and affecting the acquisition of torque; the seventh aspect is that the tangential movement and the sliding of the second clamping block form the follow-up of torque testing, so as to avoid damage to the rotating shaft structure, and at the same time, the required torque data can be obtained more accurately; the eighth aspect is that the structural layout is reasonable, which facilitates the design of the robot's stroke and improves the detection efficiency.

[0045] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A torque testing process for a rotating shaft structure, the rotating shaft structure comprising a shaft core, a left rotating arm, and a right rotating arm, wherein there are multiple shaft cores and multiple gears are used to synchronously drive the left and right rotating arms, characterized in that: The torque testing equipment used in the torque testing process includes a machine platform with an initial testing station, a break-in station, a retesting station, and a receiving station; a torsion mechanism corresponding to each station and capable of clamping the left and right rotating arms for torsion testing; and a transfer robot. The torsion mechanism includes a first clamping part and a second clamping part. The first clamping part includes a torsion positioning platform and a first clamping block mounted on the torsion positioning platform. The first clamping block has a first clamping groove that matches the left rotating arm, and the left rotating arm is inserted into the first clamping groove from top to bottom. The right rotating arm is inserted into the second clamping part from top to bottom. The second clamping part includes a rotating seat, a second clamping block mounted on the rotating seat, a driving component that drives the rotating seat to move around the vertical centerline of the torsion positioning platform, and a reset component. The second clamping block has a second clamping groove that slides and matches the right rotating arm, and the right rotating arm is inserted into the second clamping groove from top to bottom. The torque testing process includes the following steps: S1, Initial Test The transfer robot inserts the rotating shaft structure into the first and second clamping parts of the initial measurement station. The second clamping part and the first clamping part move relative to each other, and the inserted rotating arm moves with the movement of the second clamping part and generates relative sliding to perform image detection, so as to realize the measurement of the synchronous angle of the product in different postures and remove products that do not meet the measurement standards. S2, Screening After the initial test is completed, the shaft structure is lubricated. After complete lubrication, the torque test is performed using the aforementioned torsion mechanism to screen out shaft structures with torque below the set lower limit. S3, Break-in period Next, the selected shaft structure is inserted from the left and right rotating arms into the first and second clamping parts in the running-in position, and the torsion action is repeatedly tested to remove burrs and evenly distribute grease to complete the running-in of the shaft structure. S4, Retest After the break-in process, the shaft structure is inserted from the left and right rotating arms into the first and second clamping parts at the retesting station. The torsional action is repeatedly tested to obtain the torque performance of the shaft structure. The shaft structure is classified as qualified or unqualified based on the torque performance. Among the qualified shafts, the shafts are further graded based on the torque performance. S5, Receiving Materials By using a transfer robot, products of different grades are loaded into the carrier to complete the grade-based material collection.

2. The torque testing process for the shaft structure according to claim 1, characterized in that: In S1, the measurement of the synchronization angle is compared by taking photos or videos with a camera.

3. The torque testing process for the shaft structure according to claim 1, characterized in that: In S4, the good and bad products are screened based on the curve formed by the measured torque, and the upper, middle and lower limits of the good products are screened.

4. The torque testing process for the shaft structure according to claim 1, characterized in that: The rotating seat includes an annular body that rotates around the torsional positioning platform, a fixed seat fixed to one side of the annular body, and a follower seat that is slidably disposed on the fixed seat along the tangential direction of the annular body. The second clamping block is slidably disposed on the follower seat along the radial direction of the annular body. The reset member is inserted into the follower seat to maintain the tendency of the moving part of the second clamping block to slide into the follower seat. When the annular body rotates, the follower seat and the second clamping block rotate synchronously, and the follower seat and the second clamping block slide relative to the right rotating arm.

5. The torque testing process for the shaft structure according to claim 4, characterized in that: When the torsion mechanism at each workstation is in its initial position, the first clamping groove and the second clamping groove are aligned; when the torsion mechanism is in its test limit position, the first clamping groove and the second clamping groove are brought closer together.

6. The torque testing process for the shaft structure according to claim 5, characterized in that: A slide rail extending along the tangent of the annulus is formed on the fixed base, and the follower base is slidably disposed on the slide rail.

7. The torque testing process for the shaft structure according to claim 1, characterized in that: The torsion positioning platform includes a base, a central seat disposed on the base, and a torque sensor for acquiring the torque value of the rotating shaft structure during torsion.

8. The torque testing process for the shaft structure according to claim 1, characterized in that: The initial testing station and the retesting station are aligned from the ends to form a testing end, the receiving station forms a discharge end, and the running-in station is located between the testing end and the discharge end.

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