Torsion waveform detection device

Abstract

The utility model belongs to the technical field of auto spare part detection equipment, and particularly relates to a torsion waveform detection device, which comprises a base, a driving source and a crankshaft connecting rod transmission mechanism, and is characterized in that the driving source is arranged on the base; the crankshaft connecting rod transmission mechanism is arranged on the machine base. Wherein the machine base is provided with an oscillographic detection mechanism used for installing and detecting the torque of a rotating shaft to be detected, the input end of the crankshaft connecting rod transmission mechanism is connected with the output end of the driving source, and the output end of the crankshaft connecting rod transmission mechanism is in driving connection with the rotating shaft to be detected installed on the oscillographic detection mechanism. The output acting force of the driving source realizes the driving effect through the labor-saving lever structure formed by the crankshaft connecting rod, the labor-saving lever can greatly reduce the driving force required by the rotation of the to-be-tested rotating shaft, and the torsion interference influence generated by the driving source is greatly reduced, so that the precise test can be realized without no-load torsion detection. The torque detection complexity is effectively reduced, and the torque detection accuracy is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive parts testing equipment, and in particular relates to a torque waveform testing device. Background Technology

[0002] In the field of automotive driveshaft production testing, traditional torque testing devices generally adopt a testing architecture where the output shaft of the drive motor is directly connected to the driveshaft under test on the same coaxial axis. In practical implementation, this technical solution requires a rigid connection between the output end of the drive motor and the driveshaft under test via a coupling, and a torque detector is installed in series on the transmission link. Due to the structural characteristics of the testing device, the torque data collected by the torque detector is essentially the comprehensive torque value of the entire transmission system consisting of the drive motor output shaft and the driveshaft under test.

[0003] To obtain accurate torque parameters of the drive shaft under test, existing technologies require a complex multi-stage testing process: First, the output shaft of the drive motor needs to be calibrated under no-load conditions to obtain the inherent torque characteristic parameters of the drive system; during the actual testing process, a data processor needs to perform dynamic compensation calculations on the comprehensive torque value, and only after subtracting the torque component of the drive shaft itself can the measured torque data of the target drive shaft be obtained. This technical solution has the following significant drawbacks:

[0004] (1) The detection process requires step-by-step system calibration and actual measurement analysis, which is highly complex and inefficient.

[0005] (2) The laboratory calibration data of the reference torque of the drive shaft deviates from the actual dynamic working conditions, resulting in the gradual accumulation of errors;

[0006] (3) The compensation calculation process needs to take into account time-varying factors such as temperature drift and mechanical wear of the transmission system, which significantly affect the final detection accuracy;

[0007] (4) The additional benchmark testing equipment and data processing module increased the system complexity and maintenance costs. Utility Model Content

[0008] The purpose of this invention is to provide a torque waveform detection device, which aims to solve the technical problem that the torque detection of automobile drive shafts in the prior art requires the torque detection of the drive shaft to eliminate interference, resulting in a cumbersome detection process and insufficient detection accuracy.

[0009] To achieve the above objectives, this utility model provides a torque waveform detection device, including a base, a drive source, and a crankshaft connecting rod transmission mechanism. The drive source is mounted on the base; the crankshaft connecting rod transmission mechanism is mounted on the base; wherein, the base is provided with an oscilloscope detection mechanism for mounting and detecting the torque of a shaft under test, the input end of the crankshaft connecting rod transmission mechanism is connected to the output end of the drive source, and the output end of the crankshaft connecting rod transmission mechanism is drivenly connected to the shaft under test mounted on the oscilloscope detection mechanism. The output end of the drive source forms a force-saving lever transmission structure between the crankshaft connecting rod transmission mechanism and the shaft under test.

[0010] Optionally, the drive source includes a drive motor and a reduction unit, both of which are mounted on the base. The output spindle of the drive motor is driven to the input end of the crankshaft connecting rod transmission mechanism through the reduction unit.

[0011] Optionally, the crankshaft connecting rod transmission mechanism includes a first transmission arm, a transmission connecting rod, a second transmission arm, and a fixed base. The fixed base is disposed on the machine base, and the shaft to be tested is rotatably connected to the fixed base. One end of the first transmission arm is tightly connected to the end of the shaft to be tested, and one end of the second transmission arm is tightly connected to the output end of the drive source. The transmission connecting rod is rotatably connected between the first transmission arm and the second transmission arm.

[0012] Optionally, the length directions of the first transmission arm and the second transmission arm are always parallel.

[0013] Optionally, the transmission link always moves in the horizontal direction.

[0014] Optionally, the first transmission arm and the second transmission arm are at the same height.

[0015] Optionally, both the first transmission arm and the second transmission arm are configured as cam plate structures, with the wide ends of the first transmission arm and the second transmission arm respectively tightly connected to the corresponding rotating shaft to be tested and the drive source; the narrow ends of the first transmission arm and the second transmission arm are respectively rotatably connected to the corresponding ends of the transmission link.

[0016] Optionally, the fixed base includes a base plate, upright plates, and a top plate. The base plate is fixedly mounted on the machine base. There are two sets of upright plates, which are vertically fixedly mounted on the base plate. A gap is provided between the two sets of upright plates. The top plate is fixedly connected between the tops of the two sets of upright plates. The shaft to be tested is rotatably connected to the two sets of upright plates. The first transmission arm is located between the two sets of upright plates.

[0017] Optionally, the upright plate is arranged in a conical shape, with the top width of the upright plate being smaller than its bottom width, and the rotating shaft to be tested is rotatably connected to the upright plate near the top.

[0018] Optionally, the oscilloscope testing mechanism includes an oscilloscope, a torque sensor, and a mounting base. The mounting base is fixedly mounted on the base, and the end of the shaft under test away from the crankshaft connecting rod transmission mechanism is rotatably connected to the mounting base. The torque sensor is disposed in the mounting base and is used to detect the torque parameters of the shaft under test during rotation. The oscilloscope is integrated on the base and is electrically connected to the torque sensor. The torque sensor transmits the detected torque parameters of the shaft under test to the oscilloscope, and the oscilloscope outputs the torque parameters as a waveform pattern.

[0019] The torque waveform detection device provided in this embodiment of the present invention has at least one of the following technical effects: the drive source drives the crankshaft connecting rod transmission mechanism to operate, and the crankshaft connecting rod transmission mechanism drives the shaft under test to rotate through the connecting rod structure. During the rotation of the shaft under test, the oscilloscope detection mechanism detects the torque of the shaft under test and outputs it through waveform pattern imaging. Compared with the prior art, where the torque detection of the automotive drive shaft requires prior torque detection of the drive shaft to eliminate interference, resulting in a cumbersome detection process and insufficient detection accuracy, the torque waveform detection device provided in this embodiment of the present invention achieves the driving effect through the force-saving lever structure formed by the crankshaft connecting rod. The force-saving lever can significantly reduce the driving force required for the rotation of the shaft under test, and the influence of torque interference generated by the drive source is greatly reduced. Thus, accurate testing can be achieved without no-load torque detection, effectively reducing the cumbersomeness of torque detection, while ensuring the accuracy of torque detection. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the torque waveform detection device provided in the embodiment of this utility model.

[0022] Figure 2 for Figure 1 A front view of the torque waveform detection device.

[0023] Figure 3A schematic diagram of the structure of the fixed base of the torque waveform detection device provided in this embodiment of the utility model after disassembly.

[0024] The following are the labeling elements in the figure:

[0025] 100—Frame; 300—Crankshaft connecting rod transmission mechanism; 200—Drive source

[0026] 400—Oscilloscope testing mechanism; 210—Drive motor; 220—Reduction unit

[0027] 110—Mounting base plate; 120—Relief groove; 310—First transmission arm

[0028] 320—Transmission connecting rod; 330—Second transmission arm; 340—Fixed seat

[0029] 341—Base plate; 342—Vertical plate; 343—Top plate

[0030] 410—Oscilloscope; 430—Mounting mount. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-3 The described embodiments are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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 utility model.

[0033] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 mechanical connection or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0035] In one embodiment of this utility model, such as Figures 1-3 As shown, a torque waveform detection device is provided, including a base 100, a drive source 200, and a crankshaft connecting rod transmission mechanism 300. The drive source 200 is disposed on the base 100; the crankshaft connecting rod transmission mechanism 300 is disposed on the base 100; wherein, an oscilloscope detection mechanism 400 is disposed on the base 100 for mounting and detecting the torque of a shaft to be tested. The input end of the crankshaft connecting rod transmission mechanism 300 is connected to the output end of the drive source 200, and the output end of the crankshaft connecting rod transmission mechanism 300 is drivenly connected to the shaft to be tested mounted on the oscilloscope detection mechanism 400. The output end of the drive source 200 forms a force-saving lever transmission structure with the shaft to be tested through the crankshaft connecting rod transmission mechanism 300.

[0036] In this embodiment, the inner cavity of the base 100 is used to install the electrical components of the drive source 200, the oscilloscope detection mechanism 400, and the crankshaft connecting rod transmission mechanism 300; the drive source 200, the oscilloscope detection mechanism 400, and the crankshaft connecting rod transmission mechanism 300 are all installed on the top of the base 100 so that the user can easily install and remove the shaft to be tested.

[0037] Specifically, the drive source 200 drives the crankshaft connecting rod transmission mechanism 300 to operate. The crankshaft connecting rod transmission mechanism 300 drives the shaft under test to rotate through the connecting rod structure. During the rotation of the shaft under test, the oscilloscope detection mechanism 400 detects the torque of the shaft under test and outputs it through waveform pattern imaging. Compared with the existing technology where the torque detection of automotive drive shafts requires prior torque detection of the drive shaft to eliminate interference, resulting in a cumbersome detection process and insufficient detection accuracy, the torque waveform detection device provided in this utility model embodiment achieves the driving effect through the force-saving lever structure formed by the crankshaft connecting rod. The force-saving lever can significantly reduce the driving force required for the rotation of the shaft under test, and the influence of torque interference generated by the drive source 200 is greatly reduced. Thus, accurate testing can be achieved without no-load torque detection, effectively reducing the cumbersomeness of torque detection, while ensuring the accuracy of torque detection.

[0038] like Figures 1-3As shown, in another embodiment of this utility model, the drive source 200 includes a drive motor 210 and a reduction unit 220. Both the drive motor 210 and the reduction unit 220 are mounted on the base 100. The output spindle of the drive motor 210 is driven and connected to the input end of the crankshaft connecting rod transmission mechanism 300 through the reduction unit 220. In this embodiment, the reduction unit 220 is a multi-axis reduction gearbox. Multi-axis reduction gearboxes are technically mature and well-established structures, and will not be described in detail in this embodiment. The base 100 is equipped with... A mounting base plate 110 is provided, and the reduction unit 220 is fixedly mounted on the mounting base plate 110. The mounting base plate 110 is provided with a clearance groove 120, and the output end of the reduction unit 220 passes through the clearance groove 120. Using the reduction unit 220 is beneficial to improving the driving accuracy of the drive motor 210 and preventing the output spindle of the drive motor 210 from being directly driven, which would limit the type of drive motor 210. In this embodiment, the drive motor 210 is a stepper motor. In other embodiments, the drive motor 210 can be a servo motor.

[0039] like Figures 1-3 As shown, in another embodiment of this utility model, the crankshaft connecting rod transmission mechanism 300 includes a first transmission arm 310, a transmission connecting rod 320, a second transmission arm 330, and a fixed base 340. The fixed base 340 is disposed on the machine base 100, and the shaft to be tested is rotatably connected to the fixed base 340. One end of the first transmission arm 310 is tightly connected to the end of the shaft to be tested, and one end of the second transmission arm 330 is tightly connected to the output end of the drive source 200. The transmission connecting rod 320 is rotatably connected to the first transmission arm 310. Specifically, the first transmission arm 310 and the second transmission arm 330 move in the same plane. The first transmission arm 310 and the second transmission arm 330 serve as transmission mediators. The crankshaft connecting rod structure between the drive source 200, the first transmission arm 310, the second transmission arm 330, the transmission connecting rod 320 and the shaft under test allows the output force of the drive source 200 to be easily transmitted to the shaft under test through the lever formed by the connecting shaft structure. This reduces the deformation of the output main shaft of the drive motor 210 and reduces the torque interference of the drive source 200.

[0040] like Figures 1-3 As shown, in another embodiment of this utility model, the length directions of the first transmission arm 310 and the second transmission arm 330 are always parallel. The parallel first transmission arm 310 and the second transmission arm 330 form a flexible and stable parallelogram structure, which improves the operational stability of the crankshaft connecting rod transmission mechanism 300.

[0041] like Figures 1-3As shown, in another embodiment of this utility model, the transmission link 320 always moves in the horizontal direction. The transmission link 320, which always moves horizontally, can prevent the interference of gravity on the transmission link 320 and further improve the transmission efficiency of the crankshaft connecting rod transmission mechanism 300.

[0042] like Figures 1-3 As shown, in another embodiment of this utility model, the first transmission arm 310 and the second transmission arm 330 are at the same height. Designing the transmission positions of the drive source 200 and the shaft to be tested at the same height is beneficial to further reduce the influence of tilting gravity caused by the height difference.

[0043] like Figures 1-3 As shown, in another embodiment of this utility model, both the first transmission arm 310 and the second transmission arm 330 are configured with a cam plate structure. The wide ends of the first transmission arm 310 and the second transmission arm 330 are respectively tightly connected to the corresponding rotating shaft to be tested and the drive source 200. The narrow ends of the first transmission arm 310 and the second transmission arm 330 are respectively rotatably connected to the corresponding ends of the transmission link 320. With the first transmission arm 310 and the second transmission arm 330 configured with a cam plate structure, the gravity at the connection end of the transmission link 320 is greatly reduced, thereby effectively reducing the overall gravity interference formed by the first transmission arm 310, the second transmission arm 330 and the transmission link 320.

[0044] like Figures 1-3 As shown, in another embodiment of this utility model, the fixed base 340 includes a base plate 341, a vertical plate 342, and a top plate 343. The base plate 341 is fixedly mounted on the machine base 100. There are two sets of vertical plates 342, which are vertically fixedly mounted on the base plate 341 with a gap between them. The top plate 343 is fixedly connected between the tops of the two sets of vertical plates 342. The shaft to be tested is rotatably connected to the two sets of vertical plates 342. The first transmission arm 310 is located between the two sets of vertical plates 342. The fixed base 340, which adopts a frame-like box structure, helps to improve the rotational stability of the shaft to be tested, prevents the shaft to be tested from deviating during the testing process, and improves the testing accuracy.

[0045] like Figures 1-3 As shown, in another embodiment of this utility model, the upright plate 342 is arranged in a conical shape, and the top width of the upright plate 342 is smaller than its bottom width. The shaft to be tested is rotatably connected to the upright plate 342 near the top. The conical shape structure helps to increase the contact area between the upright plate 342 and the base plate 341, thereby improving the installation stability of the upright plate 342.

[0046] like Figures 1-3As shown, in another embodiment of this utility model, the oscilloscope testing mechanism 400 includes an oscilloscope 410, a torque sensor (not shown), and a mounting base 430. The mounting base 430 is fixedly mounted on the base 100. The end of the shaft to be tested away from the crankshaft connecting rod transmission mechanism 300 is rotatably connected to the mounting base 430. The torque sensor is disposed in the mounting base 430 and is used to detect the torque parameters of the shaft to be tested during rotation. The oscilloscope 410 is integrated on the base 100 and is electrically connected to the torque sensor. The torque sensor transmits the detected torque parameters of the shaft to be tested to the oscilloscope 410. The oscilloscope 410 outputs the torque parameters as waveform patterns. The oscilloscope 410 and the torque sensor are both technically mature and established structures, and will not be described in detail in this embodiment. Using the oscilloscope 410 in conjunction with the torque sensor to output the torque parameters in real time graphically facilitates the tester to obtain the torque parameters in real time and conveniently.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A torque waveform detection device, characterized in that, include: Base; A drive source, wherein the drive source is mounted on the base; A crankshaft connecting rod transmission mechanism, wherein the crankshaft connecting rod transmission mechanism is mounted on the machine base; The base is equipped with an oscilloscope testing mechanism for mounting and detecting the torque of the shaft under test. The input end of the crankshaft connecting rod transmission mechanism is connected to the output end of the drive source. The output end of the crankshaft connecting rod transmission mechanism is drivenly connected to the shaft under test mounted on the oscilloscope testing mechanism. The output end of the drive source forms a force-saving lever transmission structure between the crankshaft connecting rod transmission mechanism and the shaft under test.

2. The torque waveform detection device according to claim 1, characterized in that: The drive source includes a drive motor and a reduction unit. Both the drive motor and the reduction unit are mounted on the base. The output spindle of the drive motor is driven and connected to the input end of the crankshaft connecting rod transmission mechanism through the reduction unit.

3. The torque waveform detection device according to claim 1, characterized in that: The crankshaft connecting rod transmission mechanism includes a first transmission arm, a transmission connecting rod, a second transmission arm, and a fixed base. The fixed base is disposed on the machine base, and the shaft to be tested is rotatably connected to the fixed base. One end of the first transmission arm is tightly connected to the end of the shaft to be tested, and one end of the second transmission arm is tightly connected to the output end of the drive source. The transmission connecting rod is rotatably connected between the first transmission arm and the second transmission arm.

4. The torque waveform detection device according to claim 3, characterized in that: The length directions of the first transmission arm and the second transmission arm are always parallel.

5. The torque waveform detection device according to claim 3, characterized in that: The transmission link always moves in the horizontal direction.

6. The torque waveform detection device according to claim 3, characterized in that: The first transmission arm and the second transmission arm are at the same height.

7. The torque waveform detection device according to claim 3, characterized in that: Both the first transmission arm and the second transmission arm are configured as cam plate structures. The wide ends of the first transmission arm and the second transmission arm are respectively tightly connected to the corresponding rotating shaft to be tested and the drive source. The narrow ends of the first transmission arm and the second transmission arm are respectively rotatably connected to the corresponding ends of the transmission link.

8. The torque waveform detection device according to claim 3, characterized in that: The fixed base includes a base plate, upright plates, and a top plate. The base plate is fixedly mounted on the machine base. There are two sets of upright plates, which are vertically fixedly mounted on the base plate. There is a gap between the two sets of upright plates. The top plate is fixedly connected between the tops of the two sets of upright plates. The rotating shaft to be tested is rotatably connected to the two sets of upright plates. The first transmission arm is located between the two sets of upright plates.

9. The torque waveform detection device according to claim 8, characterized in that: The upright plate is arranged in a conical shape, with the top width of the upright plate being smaller than its bottom width, and the rotating shaft to be tested is rotatably connected to the upright plate near the top.

10. The torque waveform detection device according to claim 1, characterized in that: The oscilloscope testing mechanism includes an oscilloscope, a torque sensor, and a mounting base. The mounting base is fixedly mounted on the base. The end of the shaft under test away from the crankshaft connecting rod transmission mechanism is rotatably connected to the mounting base. The torque sensor is disposed in the mounting base and is used to detect the torque parameters of the shaft under test during rotation. The oscilloscope is integrated on the base and is electrically connected to the torque sensor. The torque sensor transmits the detected torque parameters of the shaft under test to the oscilloscope, and the oscilloscope outputs the torque parameters as a waveform pattern.

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