Electric actuator torque detection structure

Abstract

The utility model discloses a kind of electric actuator torque detection structure, belong to electric actuator detection technical field, including test platform, it is equipped with measured actuator, universal transmission assembly and torque meter in order on test platform, installation groove is equipped on test platform, measured actuator is equipped with actuator output shaft, measured actuator is connected through universal transmission assembly between torque meter, detection transmission mechanism is equipped on universal transmission assembly, torque adjustment mechanism is equipped in installation groove.The utility model can manually or combine control system automatic adjustment spring pre-tightening force by the cooperation of outer thread sleeve and linear spring, change the load resistance of measured actuator;Displacement sensor real-time feedback linear spring deformation variable, provide accurate basis for load adjustment, solve the problem that load is fixed in prior art, cannot simulate industrial field dynamic load, such as resistance change in valve opening process, make detection working condition more close to actual operation scene.

Description

Technical Field

[0001] This utility model belongs to the field of electric actuator testing technology, and in particular relates to an electric actuator torque testing structure. Background Technology

[0002] Electric actuators, as core components in industrial automation control systems, convert electrical energy into mechanical torque to drive terminal equipment such as valves, dampers, and robotic arms to perform opening, closing, regulating, or positioning actions. They are widely used in petrochemical, power energy, water treatment, and intelligent manufacturing industries. Their operational reliability and control accuracy directly affect the stability and safety of the entire industrial system. Torque parameters, as key indicators reflecting the output capacity, load adaptability, and fault status of electric actuators, are crucial for accurate detection and are essential for equipment commissioning and calibration, operational status monitoring, overload protection, and lifespan assessment.

[0003] Existing torque detection structures are difficult to implement real-time dynamic adjustment of load in practical applications, resulting in insufficient accuracy of torque detection results and an inability to accurately reflect the true torque output characteristics of the actuator under different load conditions. Utility Model Content

[0004] This utility model provides a torque detection structure for an electric actuator to solve the problems in the prior art.

[0005] The present invention adopts the following technical solution: an electric actuator torque detection structure, including a test platform, on which an actuator under test, a universal transmission assembly, and a torque meter are sequentially arranged. The test platform is provided with a mounting groove. The actuator under test is provided with an actuator output shaft. The torque meter is coaxially arranged with the actuator under test. The actuator under test and the torque meter are connected by the universal transmission assembly. The universal transmission assembly is provided with a detection transmission mechanism. A torque adjustment mechanism is provided in the mounting groove. The rotation of the universal transmission assembly drives the detection transmission mechanism to rotate to achieve torque detection.

[0006] Compared with the prior art, the present invention achieves the following beneficial effects: This invention allows for adjustment of the preload of the linear spring by rotating the external threaded sleeve, meeting the simulation requirements of different load conditions. At the same time, the displacement sensor at the bottom of the movable pressure plate monitors the deformation of the linear spring in real time. If the load needs to be adjusted, the spring compression can be changed by adjusting the external threaded sleeve, ensuring load stability during the testing process.

[0007] This invention, through the cooperation of an external threaded sleeve and a linear spring, allows for manual or automatic adjustment of the spring preload by combining with a control system, thereby changing the load resistance of the actuator under test and making the testing conditions closer to actual operating scenarios. Attached Figure Description

[0008] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 4 This is a three-dimensional structural diagram of the torque adjustment mechanism in this utility model; Figure 5 This is a front view of the torque adjustment mechanism of this utility model.

[0009] Figure label: Test platform 1, mounting slot 11, actuator under test 2, actuator output shaft 21, universal joint assembly 3, universal joint 31, input drive shaft 32, output drive shaft 33, input connecting plate 34, output connecting plate 35, torque meter 4, detection transmission mechanism 5, transmission plate 51, detection wheel 52, torque adjustment mechanism 6, support column 61, support plate 62, movable pressure plate 63, load roller 64, adjusting rod 65, external threaded sleeve 66, linear spring 67, displacement sensor 68. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0011] The technical solution of the torque detection structure for an electric actuator provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0012] Reference Figures 1 to 5 As shown, this utility model embodiment provides an electric actuator torque detection structure, including a test platform 1, on which the actuator under test 2, a universal transmission assembly 3 and a torque meter 4 are sequentially arranged.

[0013] In practice, the test platform 1 has a mounting slot 11, the actuator under test 2 has an actuator output shaft 21, and the torque meter 4 is coaxially mounted with the actuator under test 2. The actuator under test 2 and the torque meter 4 are connected by a universal joint drive assembly 3, which has a detection transmission mechanism 5. The mounting slot 11 has a torque adjustment mechanism 6. The rotation of the universal joint drive assembly 3 drives the detection transmission mechanism 5 to rotate, thereby realizing torque detection. The actuator under test 2 is detachably mounted on the test platform 1 and can be disassembled after testing to allow for testing of the next actuator under test 2.

[0014] Based on the above technical concept, it can be understood that when the actuator under test 2 is started, the output mechanical torque is transmitted to the universal transmission assembly 3 through the actuator output shaft 21. The torque is transmitted to the universal joint 31 through the input transmission shaft 32, and then to the torque meter 4 through the output transmission shaft 33 and the output connecting plate 35. The torque meter 4 directly collects the real-time torque value output by the actuator.

[0015] During torque transmission, the input drive shaft 32 synchronously drives the detection transmission mechanism 5 to move. The transmission plate 51 rotates with the input drive shaft 32, and the detection wheel 52 at its other end performs a circular motion. When the detection wheel 52 rotates to contact the load roller 64 of the torque adjustment mechanism 6, it generates radial pressure on the load roller 64, which in turn pushes the movable pressure plate 63 downward, compressing the linear spring 67 on the support plate 62. At this time, the elastic force of the linear spring 67 forms the load resistance of the actuator 2 under test. The actuator needs to overcome this resistance to output torque. The torque value detected by the torque meter 4 is the actual output torque of the actuator overcoming the current load.

[0016] The preload of the linear spring 67 can be adjusted by rotating the external threaded sleeve 66 to meet the simulation requirements of different load conditions. At the same time, the displacement sensor 68 at the bottom of the movable pressure plate 63 monitors the deformation of the linear spring 67 in real time. According to Hooke's law, the current load force can be calculated. If the load needs to be adjusted, the spring compression can be changed by adjusting the external threaded sleeve 66 to achieve real-time dynamic fine adjustment of the load, ensuring that the load is stable or changes according to a preset pattern during the detection process.

[0017] In specific implementation, the universal joint assembly 3 includes a universal joint 31, an input drive shaft 32, an output drive shaft 33, an input connecting plate 34, and an output connecting plate 35. The input drive shaft 32 and the output drive shaft 33 are respectively connected to both sides of the universal joint 31. The input connecting plate 34 is connected to the input drive shaft 32 and is detachably connected to the actuator output shaft 21. The output connecting plate 35 is connected to the output drive shaft 33 and is detachably connected to the torque rotating end of the torque meter 4.

[0018] The universal joint 31 structure of the universal drive assembly 3 can compensate for the installation coaxiality error between the output shaft 21 of the electric actuator and the torque meter 4, avoid the introduction of additional torque due to coaxiality deviation, and ensure that the torque value detected by the torque meter 4 truly reflects the output characteristics of the actuator body.

[0019] The actuator body is detachably connected to the universal joint 31 and the torque meter 4 via the input connection plate 34 and the output connection plate 35, which facilitates the replacement and testing of actuator bodies of different models and specifications.

[0020] In specific implementation, the detection transmission mechanism 5 includes a transmission plate 51 and a detection wheel 52. One end of the transmission plate 51 is connected to the input transmission shaft 32, and the detection wheel 52 is rotatably connected to the other end of the transmission plate 51. The detection wheel 52 contacts the torque adjustment mechanism 6 and is used to convert the torsion of the universal transmission assembly 3 into the displacement of the torque adjustment mechanism 6.

[0021] In specific implementation, the torque adjustment mechanism 6 includes a support column 61, a support plate 62, a movable pressure plate 63, and a load roller 64. The support column 61 is vertically installed in the mounting groove 11, and the support plate 62 is horizontally installed on top of the support column 61. The bottom of the movable pressure plate 63 is provided with four adjusting rods 65, and the load roller 64 is located on top of the movable pressure plate 63. The support plate 62 has four threaded holes, each with a threaded external threaded sleeve 66. The adjusting rods 65 and the external threaded sleeves 66 are in sliding fit. A linear spring 67 is provided between the external threaded sleeves 66 and the movable pressure plate 63. The bottom of the movable pressure plate 63 is provided with a vertically installed displacement sensor 68. The body of the displacement sensor 68 is fixed on the movable pressure plate 63, and its detection end is connected to the support plate 62 to measure the deformation of the linear spring 67.

[0022] It should be noted that the displacement sensor is a grating ruler or a linear potentiometer with an accuracy of ≤0.01mm; the linear spring 67 is a high-precision linear spring.

[0023] The linear spring 67 has stable elastic characteristics, and its deformation is linearly related to the load force. Combined with the real-time monitoring of the displacement sensor 68, it ensures the stability and repeatability of the load force.

[0024] The preload of the linear spring 67, i.e. the initial load, can be adjusted by rotating the external threaded sleeve 66 to meet the simulation requirements of different load conditions. At the same time, the displacement sensor 68 at the bottom of the movable pressure plate 63 monitors the deformation of the linear spring 67 in real time. According to Hooke's law, the current load force can be calculated. If the load needs to be adjusted, the spring compression can be changed by adjusting the external threaded sleeve 66 to achieve real-time dynamic fine-tuning of the load, ensuring that the load is stable or changes according to a preset pattern during the detection process.

[0025] By cooperating with the external threaded sleeve 66 and the linear spring 67, the preload of the linear spring 67 can be adjusted manually or automatically in conjunction with the control system to change the load resistance of the actuator 2 under test; the displacement sensor 68 provides real-time feedback on the deformation of the linear spring 67, providing accurate basis for load adjustment, solving the problem of fixed load in the existing technology and inability to simulate dynamic loads in industrial sites, such as resistance changes during valve opening, making the detection conditions closer to the actual operating scenario.

[0026] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A torque detection structure for an electric actuator, characterized in that, include: Test platform (1), wherein the test platform (1) is provided with an actuator under test (2), a universal transmission assembly (3) and a torque meter (4) in sequence; wherein the test platform (1) is provided with a mounting slot (11), the actuator under test (2) is provided with an actuator output shaft (21), the torque meter (4) is coaxially arranged with the actuator under test (2), the actuator under test (2) and the torque meter (4) are connected through the universal transmission assembly (3), the universal transmission assembly (3) is provided with a detection transmission mechanism (5), the mounting slot (11) is provided with a torque adjustment mechanism (6), the universal transmission assembly (3) rotates to drive the detection transmission mechanism (5) to rotate to realize torque detection.

2. The torque detection structure for an electric actuator according to claim 1, characterized in that: The universal drive assembly (3) includes a universal joint (31), an input drive shaft (32), an output drive shaft (33), an input connecting plate (34), and an output connecting plate (35); wherein the input drive shaft (32) and the output drive shaft (33) are respectively connected to both sides of the universal joint (31), the input connecting plate (34) is connected to the input drive shaft (32) and is detachably connected to the actuator output shaft (21), and the output connecting plate (35) is connected to the output drive shaft (33) and is detachably connected to the torque rotating end of the torque meter (4).

3. The torque detection structure for an electric actuator according to claim 1, characterized in that: The detection transmission mechanism (5) includes a transmission plate (51) and a detection wheel (52); wherein, one end of the transmission plate (51) is connected to the input transmission shaft (32), the detection wheel (52) is rotatably connected to the other end of the transmission plate (51), and the detection wheel (52) contacts the torque adjustment mechanism (6) to convert the torsion of the universal transmission assembly (3) into the displacement of the torque adjustment mechanism (6).

4. The torque detection structure for an electric actuator according to claim 1 or 3, characterized in that: The torque adjustment mechanism (6) includes a support column (61), a support plate (62), a movable pressure plate (63), and a load roller (64); wherein, the support column (61) is vertically arranged in the mounting groove (11), the support plate (62) is horizontally arranged on the top of the support column (61), the bottom of the movable pressure plate (63) is provided with four adjustment rods (65), the load roller (64) is located on the top of the movable pressure plate (63), the support plate (62) is provided with four threaded holes, each of the threaded holes is provided with a threaded external threaded sleeve (66), the adjustment rods (65) and the external threaded sleeves (66) are slidably engaged, and a linear spring (67) is provided between the external threaded sleeves (66) and the movable pressure plate (63).

5. The torque detection structure for an electric actuator according to claim 4, characterized in that: The bottom of the movable pressure plate (63) is provided with a vertically arranged displacement sensor (68), which is fixed on the movable pressure plate (63) to measure the deformation of the linear spring (67).

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