A drive belt tensile testing machine

Abstract

The utility model discloses a kind of transmission belt tensile testing machines, including the rack of being installed on main body, the middle part of the rack is provided with fixed base, and the bottom end of fixed base and main body are all provided with clamp, the clamp of symmetrical setting is provided with cylinder between fixed base and main body respectively, the end of the clamp is provided with clamping assembly symmetrically, the clamping assembly is composed of base, sawtoothed clamping seat, rubber seat, the base is fixed with clamp, the sawtoothed clamping seat is set on base;Through the clamping assembly of design setting, sawtoothed structure increases the contact area of clamp and transmission belt surface, generates friction, effectively prevent transmission belt from sliding in clamp, rubber seat has good buffering performance, compared with metal direct contact, sawtoothed rubber seat can reduce rigid loss to transmission belt surface while providing sufficient friction.

Description

Technical Field

[0001] This utility model belongs to the field of testing machine technology, specifically relating to a transmission belt tensile testing machine. Background Technology

[0002] The transmission belt tensile testing machine is a mechanical testing device specifically designed to test the tensile properties of transmission belts. It is used to evaluate various mechanical performance indicators of transmission belts under tensile force, ensuring their reliability and stability in practical applications.

[0003] When performing tensile tests on existing transmission belts using tensile testing machines, the transmission belts have special textures and shapes, relatively smooth surfaces, and good flexibility. The clamping surfaces of existing fixtures are relatively flat and cannot provide sufficient and uniform clamping force, causing the transmission belts to slip in the fixtures during the test, resulting in inaccurate tensile strength data. To address this issue, this utility model proposes a transmission belt tensile testing machine. Utility Model Content

[0004] The purpose of this utility model is to provide a transmission belt tensile testing machine to solve the problem that the clamping surface of the tensile testing machine fixture mentioned in the background art is relatively flat and cannot be used for clamping transmission belts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a transmission belt tensile testing machine, comprising a frame mounted on a main body, a fixed seat provided in the middle of the frame, and clamps provided at the bottom of the fixed seat and on the main body, cylinders provided between the symmetrically arranged clamps and the fixed seat and the main body respectively, clamping components symmetrically arranged at the ends of the clamps, the clamping components consisting of a base, a serrated clamp, and a rubber seat, the base being fixed to the clamps, the serrated clamp being disposed on the base, the rubber seat being fixed to the surface of the serrated clamp, engaging components symmetrically arranged at the contact points between the serrated clamp and the base, the engaging components consisting of a slider and a groove, the groove being opened on the front side of the base, the slider being fixed on the rear side of the serrated clamp, the slider and the groove being in an engaging state, and a limit component being provided at the top of the symmetrically arranged engaging components and between the contact points between the serrated clamp and the base.

[0006] Preferably, the surface of the slider is in contact with the inner wall of the groove, and the end cross-section of the slider has a T-shaped structure.

[0007] Preferably, the limiting component consists of a limiting rod, a threaded telescopic groove, a movable groove, and a recess. The threaded telescopic groove is located on the rear side of the sawtooth-shaped clamp, the movable groove is located at the top of the slide groove and at the top of the base, the recess is located on the side of the movable groove, and the limiting rod is located inside the threaded telescopic groove, the movable groove, and the recess.

[0008] Preferably, the limiting rod and the threaded expansion groove are connected by a thread.

[0009] Preferably, the limiting rod is a cylindrical structure.

[0010] Preferably, lead screws are provided at both ends of the fixed base and on the inner side of the frame, and a reduction motor is provided at the output end of the lead screw and on the inner side of the main body.

[0011] Preferably, a force sensor is installed on the main body, and a displacement sensor is also installed on the main body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By designing and configuring clamping components, the problem of belt slippage in tensile tests is solved, and measurement accuracy is improved.

[0014] 1. Increased friction: The serrated structure increases the contact area between the clamp and the transmission belt surface. The rubber seat itself has a certain elasticity and viscosity. When combined with the serrations, it can fit more tightly against the transmission belt surface. Even if the transmission belt surface is smooth, the serrations can embed into the microscopic uneven structure of the transmission belt surface during the tensile test, thereby generating greater friction and effectively preventing the transmission belt from sliding in the clamp.

[0015] 2. Provides uniform clamping force: When the serrated rubber pad is under force, each serration can contact the transmission belt and apply force relatively independently. When the clamp clamps the transmission belt, the serrations at different positions can automatically adjust the force state according to the slight undulations of the transmission belt surface, so that the clamping force distribution on the entire contact surface is more uniform, avoiding damage to the transmission belt due to excessive local clamping force or slippage due to insufficient local clamping force, and ensuring the consistency of the force on the transmission belt during the test.

[0016] 3. Protection of the transmission belt: The rubber seat has good cushioning performance. Compared with direct metal contact, the serrated rubber seat can reduce rigid damage to the surface of the transmission belt while providing sufficient friction. The elasticity of the rubber seat can absorb some of the stress generated when the clamp is tightened, preventing the transmission belt from tearing or wearing due to clamping before the tensile test is carried out. This ensures that the original state of the transmission belt is maintained, and the tensile strength measurement data can better reflect its true performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This utility model Figure 1 Enlarged schematic diagram of region A in the diagram;

[0019] Figure 3This is a schematic diagram of the clamping component structure of this utility model;

[0020] Figure 4 This utility model Figure 3 Enlarged schematic diagram of region B in the diagram;

[0021] In the diagram: 1. Main body; 2. Frame; 3. Fixed base; 4. Clamp; 40. Clamping assembly; 401. Base; 4011. Slider; 4012. Slide groove; 402. Serrated clamp; 4021. Limiting rod; 4022. Threaded telescopic groove; 4023. Movable groove; 4024. Groove; 403. Rubber seat. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 4This utility model provides a technical solution: a transmission belt tensile testing machine, including a frame 2 mounted on a main body 1, a fixed seat 3 in the middle of the frame 2, and clamps 4 on the bottom end of the fixed seat 3 and on the main body 1. Cylinders are provided between the symmetrically arranged clamps 4 and the fixed seat 3 and the main body 1 respectively. Clamping components 40 are symmetrically arranged at the ends of the clamps 4. The clamping components 40 consist of a base 401, a serrated clamp 402, and a rubber seat 403. The base 401 is fixed to the clamps 4, the serrated clamp 402 is disposed on the base 401, and the rubber seat 403 is fixed to the surface of the serrated clamp 402. When the serrated clamp 402 is installed with the base 401, the slider 4011 between them engages with the groove 4012. A symmetrical locking assembly is provided at the contact point between the serrated clamp 402 and the base 401. The locking assembly consists of a slider 4011 and a groove 4012. The groove 4012 is located on the front side of the base 401, and the slider 4011 is fixed to the rear side of the serrated clamp 402. The slider 4011 and the groove 4012 are in a locked state. A limit component is provided at the top of the symmetrically arranged locking assembly and between the contact point of the serrated clamp 402 and the base 401. By designing the clamping assembly 40, the slippage problem of the transmission belt in the tensile test is solved, and the measurement accuracy is improved, etc.: 1. Increased friction: The serrated structure increases the contact area between the clamp 4 and the surface of the transmission belt. The rubber seat 403 itself has a certain elasticity and viscosity, and after being combined with the serrations, it becomes more elastic and more viscous. 1. It can fit more tightly to the surface of the transmission belt. Even if the transmission belt surface is smooth, the serrations can embed into the microscopic uneven structure of the transmission belt surface during tensile testing, thereby generating greater friction and effectively preventing the transmission belt from slipping in the clamp; 2. It provides uniform clamping force: When the serrated rubber pad is under force, each serration can contact and apply force to the transmission belt relatively independently. When the clamp clamps the transmission belt, the serrations at different positions can automatically adjust the force state according to the slight undulations of the transmission belt surface, making the clamping force distribution on the entire contact surface more uniform. This avoids damage to the transmission belt due to excessive local clamping force or slippage due to insufficient local clamping force, ensuring the consistency of the force on the transmission belt during the test; 3. It protects the transmission belt: The rubber seat 403 has good cushioning performance, compared with Compared to direct metal contact, the serrated rubber seat 403 provides sufficient friction while reducing rigid damage to the transmission belt surface. The elasticity of the rubber seat 403 can absorb some of the stress generated when the clamp is tightened, preventing the transmission belt from tearing or wearing due to clamping before the tensile test, thus ensuring the original state of the transmission belt and making the tensile strength measurement data more reflective of its true performance. The surface of the slider 4011 is in contact with the inner wall of the groove 4012. The end cross-section of the slider 4011 is T-shaped. Both ends of the fixed seat 3 and the inner side of the frame 2 are equipped with lead screws. The output end of the lead screw and the inner side of the main body 1 are equipped with a reduction motor. A force sensor and a displacement sensor are installed on the main body 1.

[0024] In this embodiment, preferably, the limiting component consists of a limiting rod 4021, a threaded telescopic groove 4022, a movable groove 4023, and a recess 4024. The threaded telescopic groove 4022 is located on the rear side of the serrated clamp 402, the movable groove 4023 is located at the top of the slide groove 4012 and at the top of the base 401, and the recess 4024 is located on the side of the movable groove 4023. By engaging the slider 4011 with the slide groove 4012, the limiting component is operated. By pushing the limiting rod 4021, the limiting rod 4021 and the threaded telescopic groove 4022 rotate threadedly, allowing the end of the limiting rod 4021 to engage with the recess. Inside the groove 4024, the engaging assembly between the serrated clamp 402 and the base 401 is limited, completing the installation of the serrated clamp 402 and the base 401. The serrated clamp 402 is detachable, which meets the requirements of replacing the serrated clamp 402 when it is damaged during the operation of the tensile testing machine, and allows for the selection of a suitable fitting clamping surface structure for tensile testing of different samples. The limiting rod 4021 is set inside the threaded expansion groove 4022, inside the movable groove 4023, and inside the groove 4024. The limiting rod 4021 and the threaded expansion groove 4022 are threadedly connected, and the limiting rod 4021 has a cylindrical structure.

[0025] The working principle and usage process of this utility model are as follows: When the transmission belt undergoes a tensile test in the tensile testing machine, the transmission belt sample is clamped by symmetrically arranged clamps 4. According to the test speed and loading mode set by the control system, the reduction motor drives the lead screw to rotate, converting the rotational motion into linear motion, and precisely applying force to the sample to achieve tensile, compressive, and other mechanical loading. The loading speed and force output are adjusted in real time to maintain the stability of the test process. The force sensor continuously collects the tensile force data of the sample, and the displacement sensor synchronously monitors the deformation displacement of the sample. The data is transmitted to the control system in real time at high frequency. When the sample fractures due to tensile stress or completes the set test cycle and displacement stroke, the transmission system automatically stops loading, and the measurement system records the final test data. Finally, the control system automatically saves the test data and curves. The operator can perform preliminary analysis of the data through software, then loosen the clamps 4, remove the sample fragments, and clean the working area of ​​the testing machine.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tensile testing machine for drive belts, comprising a frame (2) mounted on a main body (1), characterised in that: A fixed base (3) is provided in the middle of the frame (2), and clamps (4) are provided at the bottom of the fixed base (3) and on the main body (1). Cylinders are provided between the symmetrically arranged clamps (4) and the fixed base (3) and the main body (1) respectively. Clamping components (40) are symmetrically arranged at the ends of the clamps (4). The clamping components (40) are composed of a base (401), a serrated clamp (402), and a rubber seat (403). The base (401) is fixed to the clamp (4), the serrated clamp (402) is set on the base (401), and the rubber seat (403) is fixed. A locking component is symmetrically arranged at the contact point between the serrated clamp (402) and the base (401) on the surface of the serrated clamp (402). The locking component consists of a slider (4011) and a groove (4012). The groove (4012) is opened on the front side of the base (401), and the slider (4011) is fixed on the rear side of the serrated clamp (402). The slider (4011) and the groove (4012) are in a locking state. A limiting component is provided at the top of the symmetrically arranged locking component and between the contact point between the serrated clamp (402) and the base (401).

2. A tensile testing machine for drive belts as claimed in claim 1, characterized in that: The surface of the slider (4011) is in contact with the inner wall of the groove (4012), and the end cross-section of the slider (4011) has a T-shaped structure.

3. A tensile testing machine for drive belts as claimed in claim 1, characterized in that: The limiting assembly consists of a limiting rod (4021), a threaded telescopic groove (4022), a movable groove (4023), and a recess (4024). The threaded telescopic groove (4022) is located on the rear side of the serrated clamp (402). The movable groove (4023) is located at the top of the slide groove (4012) and at the top of the base (401). The recess (4024) is located on the side of the movable groove (4023). The limiting rod (4021) is located inside the threaded telescopic groove (4022), inside the movable groove (4023), and inside the recess (4024).

4. A tensile testing machine for drive belts as claimed in claim 3, characterized in that: The limiting rod (4021) and the threaded expansion groove (4022) are connected by a thread.

5. A tensile testing machine for drive belts as claimed in claim 3, characterized in that: The limiting rod (4021) has a cylindrical structure.

6. A tensile testing machine for drive belts as in claim 1, wherein: Both ends of the fixed base (3) and inside the frame (2) are provided with lead screws, and the output end of the lead screw and inside the main body (1) is provided with a speed reduction motor.

7. A drive belt tensile testing machine as claimed in claim 1 wherein: A force sensor is installed on the main body (1), and a displacement sensor is installed on the main body (1).

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