A kind of hub assembly torsion test equipment

Abstract

The utility model provides a kind of tooth hub assembly torsion test equipment, including test table and be located on the driving end and mobile end of test table, mobile end is configured as can be close to or far from driving end, it is convenient to multiple tooth hub assembly quick clamping and replacement, improve test efficiency;Driving end is equipped with clamping fixing part towards mobile end;Mobile end is equipped with torque sensor towards driving end;Tooth hub assembly is configured as fixed on driving end and with spline shaft installed in interface coaxial cooperation fixed, through clamping fixing part and interface accurate cooperation, make tooth hub assembly and spline shaft in clamping stage preliminary coaxial positioning, lay foundation for subsequent test accuracy;The rotating direction of driving end and mobile end is opposite, two-way torsion is applied to tooth hub assembly when testing, simulate its in actual transmission system withstand positive and negative torque working condition, detect its torsion transmission performance and structural strength comprehensively, avoid one-way test limitation, improve the comprehensiveness and reference value of test result.

Description

Technical Field

[0001] This utility model relates to the field of gear hub assembly testing technology, and in particular to a gear hub assembly torque testing device. Background Technology

[0002] Throughout the entire production and assembly process of the gear hub assembly, the torque transmission performance of the gear hub assembly and splined shaft directly affects the stability and service life of the overall transmission system. It can be said that this torque transmission performance is one of the key factors determining whether the transmission system can operate stably and sustainably.

[0003] Traditional torque testing methods typically suffer from numerous problems. For example, they are cumbersome, requiring a series of complex steps to complete the test, consuming significant time and manpower; their positioning accuracy is low, making it difficult to accurately determine the test position, which can lead to inaccurate test results; and the test data has large errors, failing to accurately reflect the actual torque situation. These problems make traditional torque testing methods unsuitable for the quality inspection requirements of high-precision gear hub assemblies. Especially in controlling the coaxiality of the gear hub assembly and the spline shaft, existing equipment lacks effective means to ensure precise coaxiality, which affects the accuracy of torque transmission. Furthermore, in terms of real-time torque monitoring during reverse rotation, existing equipment lacks a reasonable and effective structural design, failing to acquire torque data in a timely and accurate manner. This results in extremely low testing efficiency and an inability to accurately reflect the torque characteristics under actual operating conditions, significantly reducing the reference value of the test results.

[0004] Therefore, developing a new type of testing equipment is particularly important. This equipment must be able to achieve precise positioning to ensure the accuracy of the test location; it must have a stable clamping function to ensure that the gear hub assembly and spline shaft do not wobble or shift during testing; and it must be able to monitor reverse torque in real time and efficiently, obtaining accurate torque data promptly. Such testing equipment is of great significance for improving the product quality of gear hub assemblies and ensuring the safe operation of transmission systems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model proposes a gear hub assembly torque testing device, which aims to achieve precise positioning and ensure the accuracy of the test position. At the same time, it has a stable clamping function to ensure that the gear hub assembly and spline shaft will not shake or shift during the test. It can also monitor the reverse torque in real time and efficiently, and obtain accurate torque data in a timely manner.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a gear hub assembly torque testing device, characterized in that it includes a test platform and a drive end and a movable end disposed on the test platform, wherein the movable end is configured to be able to approach or move away from the drive end; The drive end is provided with a clamping and fixing component facing the movable end; the movable end is provided with an interface and a torque sensor for matching with the spline shaft facing the drive end; the gear hub assembly is configured to be fixed on the drive end and coaxially engaged with the spline shaft installed in the interface; the drive end and the movable end rotate in opposite directions.

[0007] In some embodiments, an actuator is fixedly provided in the movable end. The actuator is sequentially connected to a torque sensor and an interface on the side facing the drive end, and is configured to drive the interface to rotate. Therefore, the actuator can provide a stable driving torque to drive the interface and the spline shaft connected to it to rotate. At the same time, the torque sensor monitors and feeds back the torque value during the test in real time, realizing dynamic detection of the torque performance of the gear hub assembly.

[0008] In some embodiments, the center of the interface and the center of the clamping fastener are located on the same axis; thus, it can be ensured that the gear hub assembly and the spline shaft always rotate coaxially during the test, avoiding additional torque or eccentric load caused by shaft offset, thereby improving the accuracy of torque measurement and the reliability of test results, and reducing test errors caused by installing different shafts.

[0009] In some embodiments, a floating coupling is also included, with its two ends connected to the torque sensor and the actuator, respectively. This can compensate for slight coaxiality deviations that may occur during installation, effectively buffer the impact load when the actuator outputs torque, reduce the risk of damage to the torque sensor due to instantaneous overload or vibration, and ensure the smoothness of torque transmission, thereby further improving the accuracy of test data.

[0010] In some embodiments, at least one guide is provided along the length of the test bench, and the movable end should reciprocate along the length of the guide. Therefore, the movement trajectory of the movable end can be precisely constrained by the guide, ensuring that the movable end always maintains a straight line movement when approaching or moving away from the drive end, avoiding additional stress when the gear hub assembly and spline shaft are engaged due to the offset of the movable end, while improving the smoothness and positioning accuracy of the movable end movement, and adapting to the clamping requirements of gear hub assemblies of different sizes.

[0011] In some embodiments, a servo electric cylinder is also provided on the test bench, the servo electric cylinder being fixedly connected to the side of the movable end away from the drive end; thus, while the actuator applies torque to the gear hub assembly, it can control the spline shaft to perform micron-level or millimeter-level axial movement within the spline groove of the gear hub assembly, realistically simulating the torque transmission conditions of a vehicle, while also taking into account the reciprocating motion drive of the movable end along the length direction of the guide member.

[0012] The servo electric cylinder provides precise linear drive force, which drives the movable end to move smoothly along the guide, enabling rapid clamping and positioning of gear hub assemblies of different lengths. Its closed-loop control system can adjust the positional accuracy of the movable end in real time to ensure that the axial preload of the gear hub assembly and spline shaft are consistent, avoiding the impact of uneven clamping force on the repeatability of test results.

[0013] In some embodiments, a drive motor is fixedly provided in the drive end, and the clamping fixture is fixed on the drive motor and configured to be driven to rotate by the drive motor; therefore, the drive motor can provide controllable rotational power to drive the clamping fixture and the gear hub assembly fixed thereon to rotate stably. Combined with the reverse rotation of the movable end, a bidirectional torsional loading is formed on the gear hub assembly, simulating the stress state of the gear hub assembly in actual work, thereby more comprehensively testing its torsional performance.

[0014] In some embodiments, the clamping fastener includes a turntable and a plurality of clamping blocks evenly distributed on the turntable, each of the clamping blocks reciprocating radially along the turntable; thus, by adjusting the movement distance of the clamping blocks along the radial direction of the turntable, it is possible to adapt to the fixing requirements of gear hub assemblies with different outer diameters, achieving compatible clamping of various types of gear hubs; the evenly distributed clamping block design can apply clamping force uniformly from the circumference, ensuring that the gear hub assembly will not loosen or rotate eccentrically when rotating at high speed or subjected to torque, improving the stability and reliability of clamping, and reducing test data fluctuations caused by unstable clamping.

[0015] In some embodiments, the clamping block has a stepped structure; the outer edge of the gear hub assembly is provided with a protrusion, and the thickness from the top side of the protrusion to the bottom side of the gear hub assembly is not greater than the step height of the stepped structure; therefore, by matching the different height levels of the stepped structure with the thickness of the protrusion on the outer edge of the gear hub assembly, precise engagement of protrusions of different thicknesses can be achieved, avoiding squeezing damage to the surface of the gear hub assembly during clamping; at the same time, the stepped structure can limit the gear hub assembly from the axial direction, preventing the gear hub assembly from moving along the axial direction during the test, further enhancing the stability of clamping and fixing, ensuring that the gear hub assembly always maintains reliable engagement with the spline shaft under bidirectional torque, and improving the safety of the test process and the continuity of data acquisition.

[0016] Compared with the prior art, the beneficial effects of this utility model include: In the technical solution of this application embodiment, the gear hub assembly torque testing equipment includes a test bench and a drive end and a movable end disposed on the test bench. The movable end is configured to be able to approach or move away from the drive end, facilitating the quick clamping and replacement of multi-tooth hub assemblies and improving testing efficiency. The drive end is provided with a clamping and fixing component facing the movable end. The movable end is provided with an interface and a torque sensor for matching with the spline shaft facing the drive end. The gear hub assembly is configured to be fixed on the drive end and coaxially engaged with the spline shaft installed in the interface. Through the precise engagement of the clamping and fixing component and the interface, the gear hub assembly and the spline shaft are initially coaxially positioned during the clamping stage, laying the foundation for the accuracy of subsequent testing. The drive end and the movable end rotate in opposite directions. During testing, a bidirectional torque is applied to the gear hub assembly to simulate the working condition of it bearing positive and negative torques in an actual transmission system, comprehensively testing its torque transmission performance and structural strength, avoiding the limitations of unidirectional testing, and improving the comprehensiveness and reference value of the test results. Attached Figure Description

[0017] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 The schematic diagram shows the overall structure of the gear hub assembly torque testing equipment; Figure 2 Schematic representation Figure 1 The frontal structure.

[0018] The numbers in the diagram are: 1-Test stand, 2-Drive end, 3-Moving end, 4-Clamping fixture, 41-Turntable, 42-Clamping block, 5-Interface, 6-Guide, 7-Servo electric cylinder. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0021] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0024] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0025] In this application, "multiple" means two or more (including two).

[0026] The gear hub assembly includes an upper gear hub, a lower gear hub, and a bushing. Both the upper and lower gear hubs are annular structures and are welded together. The bushing is located at the center of the upper and lower gear hubs and is also welded together with them.

[0027] Please see Figure 1 and Figure 2 A gear hub assembly torque testing device includes a test bench 1 and a drive end 2 and a movable end 3 disposed on the test bench 1. The movable end 3 is configured to be able to approach or move away from the drive end 2, which on the one hand facilitates the continuous testing process of the gear hub assembly on the torque testing device, and on the other hand can adapt to the torque testing process of gear hub assemblies of different widths and sizes to a certain extent.

[0028] The aforementioned drive end 2, facing the movable end 3, is equipped with a clamping and fixing component 4 for clamping and fixing the gear hub assembly onto the drive end 2. This clamping and fixing component 4 acts on the outer edge surface of the lower gear hub. The movable end 3, facing the drive end 2, is equipped with an interface 5 for matching with a spline shaft and a torque sensor. Different specifications of spline shafts can be replaced through the interface 5 to adapt to gear hub assemblies with different internal spline parameters, improving the compatibility of the equipment with various product models. After the gear hub assembly is clamped and fixed on the drive end 2 by the aforementioned clamping and fixing component 4, it is coaxially fixed by the spline shaft in the interface 5 engaging with the internal spline of the bushing. Then, the drive end 2 drives the gear hub assembly to rotate, while the movable end 3 drives the spline shaft to rotate in the opposite direction, so that the gear hub assembly is subjected to bidirectional torque, thus completing the torque test process of the gear hub assembly. During the process, the torque sensor collects and records the torque values ​​of the gear hub assembly at different torsion angles or speeds in real time, forming a complete torque performance curve.

[0029] To achieve reverse rotation drive of the spline shaft by the movable end 3, an actuator is fixedly installed in the movable end 3. This actuator can be composed of a servo motor and a reducer. The actuator, facing the drive end 2, is sequentially connected to the torque sensor and interface 5. In this embodiment, the center of the aforementioned interface 5 and the center of the clamping fixture 4 are located on the same axis. This design ensures that the axis of the gear hub assembly always coincides with the axis of the spline shaft during the test, effectively avoiding additional torque interference caused by installation eccentricity. This ensures that the torque sensor can accurately capture the actual force situation of the gear hub assembly during the torsion process, providing a fundamental guarantee for the accuracy of the test data.

[0030] To further optimize the stability of torque transmission, the equipment is also equipped with a floating coupling, with the torque sensor and actuator connected to its two ends respectively. Utilizing the elastic buffering characteristics of the floating coupling, it can absorb any instantaneous impact that may occur when the actuator outputs torque, while also compensating for coaxiality deviations caused by installation errors. This reduces the risk of damage to the torque sensor due to overload or vibration, and extends the service life of critical components of the equipment.

[0031] Two guide members 6 are arranged parallel to each other along the length of the test bench 1. The bottom of the movable end 3 slides with the guide members 6 via a slider, allowing the movable end 3 to move smoothly along the extension direction of the guide members 6. This design not only ensures the linear motion accuracy of the movable end 3 as it approaches or moves away from the drive end 2, avoiding lateral stress when the gear hub assembly is connected to the spline shaft, but also adapts to the clamping requirements of gear hub assemblies with different axial dimensions, improving the ease of operation of the equipment.

[0032] In a further embodiment, a servo electric cylinder 7 is also provided on the test bench 1. The telescopic end of the servo electric cylinder 7 is fixedly connected to the side of the movable end 3 away from the drive end 2. On the one hand, the telescopic movement of the servo electric cylinder 7 provides driving force for the movable end 3 to reciprocate along the length of the guide member 6. On the other hand, after the spline shaft is embedded in the spline groove, the servo electric cylinder 7 is adjusted to reciprocate slightly along its length, thereby controlling the spline shaft to perform micron-level or millimeter-level axial "creep" or "vibration" in the spline groove of the gear hub assembly. This realistically simulates the micro-motion wear between the gear hub spline shaft and the spline groove caused by vibration and deformation when the vehicle transmits torque. Through this dynamic simulation, the durability and fatigue resistance of the gear hub assembly under actual working conditions can be evaluated more comprehensively, especially the wear degree of the spline mating surface, the tooth surface contact stress distribution, and the stability of the overall structure can be thoroughly tested. The closed-loop control characteristics of the servo electric cylinder 7 can precisely adjust the moving speed, displacement, and dwell time of the moving end 3, enabling simulation of different micro-motion frequencies, amplitudes, and load conditions. This provides detailed data support for analyzing the failure mechanisms of gear hub assemblies under complex working conditions, further expanding the testing functions and application scope of the equipment. Furthermore, by measuring the relationship between axial force and displacement, the shifting force, stroke, and jamming sensation can be quantitatively analyzed, providing data support for optimized design.

[0033] The power source for the drive end 2 is a fixed drive motor, and the clamping and fixing part 4 is directly installed on the output shaft end of the drive motor, which drives it to rotate.

[0034] The clamping and fixing component 4 is described in detail below. The clamping and fixing component 4 specifically includes a circular turntable 41 and three clamping blocks 42 evenly distributed along the edge of the turntable 41. Each clamping block 42 can be driven by a built-in cylinder to extend and retract radially along the turntable 41. When clamping the gear hub assembly, the clamping block 42 opens outward under the action of the cylinder. After the gear hub assembly is placed in position, the clamping block 42 retracts inward and presses tightly against the outer edge surface of the lower gear hub, achieving a firm fixation of the gear hub assembly. The inner surface of the clamping block 42 is designed with an arc-shaped structure matching the outer edge surface of the lower gear hub, and the surface is provided with anti-slip texture, which can further enhance the stability of clamping and prevent the gear hub assembly from slipping or shifting during high-speed rotation testing. In addition, the clamping block 42 adopts a stepped structure design, with the step height slightly greater than the thickness of the outer edge protrusion of the gear hub assembly. This allows the clamping block 42 to simultaneously limit the upper and lower end faces of the protrusion when clamping, effectively preventing the gear hub assembly from moving axially during the test and ensuring the safety and reliability of the test process.

[0035] During testing, the movable end 3 is first moved away from the drive end 2 along the guide 6 to create sufficient operating space between the drive end 2 and the movable end 3. Then, one end of the gear hub assembly is radially clamped and fixed by the clamping block 42 of the clamping and fixing component 4. The stepped structure of the clamping block 42 is adapted to engage with the protrusion on the outer edge of the gear hub assembly to achieve axial limiting. Next, the spline shaft is installed in the interface 5 of the movable end 3, and the movable end 3 is controlled to move along the guide 6 towards the drive end 2 until the spline shaft and the other end of the gear hub assembly are coaxially engaged and fixed. At this time, the center of the interface 5 and the center of the clamping and fixing component 4 are on the same axis. The drive motor and actuator are started. The drive motor drives the clamping and fixing component 4 and the gear hub assembly to rotate clockwise. The actuator drives the interface 5 and the spline shaft to rotate counterclockwise through the floating coupling and torque sensor. The torque generated by the reverse rotation acts on the gear hub assembly. The torque sensor collects and records the torque data in real time during the test. When the torque reaches the preset threshold or the gear hub assembly fails, the equipment automatically stops running, completing one torque test cycle.

[0036] Those skilled in the art will understand that the above embodiments are exemplary and not restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specification, and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to identify names and not to indicate any particular order. No reference numerals in the claims should be construed as limiting the scope of protection. The functionality of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A torque testing device for a gear hub assembly, characterized in that, It includes a test bench (1) and a drive end (2) and a movable end (3) disposed on the test bench (1), wherein the movable end (3) is configured to be able to approach or move away from the drive end (2). The drive end (2) is provided with a clamping fastener (4) facing the movable end (3); the movable end (3) is provided with an interface (5) for matching with the spline shaft and a torque sensor facing the drive end (2); the gear hub assembly is configured to be fixed on the drive end (2) and coaxially engaged with the spline shaft installed in the interface (5); the drive end (2) and the movable end (3) rotate in opposite directions.

2. The gear hub assembly torque testing device according to claim 1, characterized in that, An actuator is fixedly provided in the active end (3). The actuator is connected to the torque sensor and the interface (5) in sequence on the side facing the drive end (2), and is configured to drive the interface (5) to rotate.

3. The gear hub assembly torque testing device according to claim 2, characterized in that, The center of the interface (5) and the center of the clamping fastener (4) are located on the same axis.

4. The gear hub assembly torque testing device according to claim 3, characterized in that, It also includes a floating coupling, the two ends of which are connected to the torque sensor and the actuator, respectively.

5. The gear hub assembly torque testing device according to claim 1, characterized in that, At least one guide (6) is provided along the length direction of the test bench (1), and the movable end (3) should reciprocate along the length direction of the guide (6).

6. The gear hub assembly torque testing device according to claim 5, characterized in that, It also includes a servo electric cylinder (7) mounted on the test bench (1), the servo electric cylinder (7) being fixedly connected to the side of the movable end (3) away from the drive end (2).

7. The gear hub assembly torque testing device according to claim 1, characterized in that, A drive motor is fixedly provided in the drive end (2), and the clamping and fixing member (4) is fixed on the drive motor and configured to be driven to rotate by the drive motor.

8. The gear hub assembly torque testing device according to claim 7, characterized in that, The clamping and fixing member (4) includes a turntable (41) and a plurality of clamping blocks (42) evenly distributed on the turntable (41), and any one of the clamping blocks (42) should reciprocate radially along the turntable (41).

9. The gear hub assembly torque testing device according to claim 8, characterized in that, The clamping block (42) has a stepped structure; the outer edge of the gear hub assembly is provided with a protrusion, and the thickness from the top side of the protrusion to the bottom side of the gear hub assembly is not greater than the step height of the stepped structure.

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