A drone motor propeller tension testing device

Abstract

The application relates to a UAV motor propeller tension testing device and belongs to the technical field of force testing. The device comprises a base, a testing structure and a tilting structure. The testing structure and the tilting structure are installed on the upper end of the base. The testing structure comprises a mounting seat, a tension shaft, a torsion rod, a mounting plate, a sensor, a mounting support, a plane bearing, a sliding bearing, a special pin and a mounting base. The sensor in the testing structure is connected with a motor to be tested and a propeller to be tested for testing the torsion and the tension. The tilting structure comprises a connecting rod, an angle fixer, a rotating support and a fixing seat. The connecting rod connects the testing structure and the tilting structure, and the testing structure can be adjusted at multiple angles.

Description

Technical Field

[0001] This utility model belongs to the field of force testing technology, specifically relating to a device for testing the tensile force of a drone motor propeller. Background Technology

[0002] Regardless of the design method, drones rely on motors and propellers, requiring accurate parameters such as thrust and torque. While commercially available motors and propellers are generally readily available, the high cost of motor and propeller thrust testing equipment necessitates testing and verification to ensure that commercially available motors and propellers meet requirements and that the thrust parameters provided are accurate. The accuracy of these critical parameters often determines the success of the subsequent drone platform design.

[0003] Chinese patent CN220483565U (published on February 13, 2024) discloses a drone propeller testing device, relating to the field of drone propeller testing technology. The device includes a base, with guide rails symmetrically fixedly arranged within the base cavity. A mounting seat is slidably arranged along the guide rails in a horizontal direction. One end of a central rod is fixedly connected to the side of the mounting seat. The other end of the central rod is fixedly connected to the output end of a tension sensor. The tension sensor is fixedly connected to the top of the base. A testing component is fixedly arranged on the top of the mounting seat. A buffer component protecting the testing component is provided on one side of the mounting seat.

[0004] Chinese Patent CN110940590A (published on September 27, 2022) discloses an axial tensile force testing device and its testing method. The testing device includes a base assembly, a clamp assembly, a first cylinder, a second cylinder, a first pressure sensor, a second pressure sensor, a first dial indicator, and a second dial indicator. The clamp assembly is positioned above the base assembly. The first and second cylinders are vertically and symmetrically arranged between the base assembly and the clamp assembly. The piston rod of the first cylinder has a first pressure sensor at its end, and the piston rod of the second cylinder has a second pressure sensor at its end. The probes of the first and second dial indicators respectively mate with the upper end face of the base assembly. The testing method involves: selecting the base assembly and the clamp assembly; clamping the blade root; clamping the blade blade; installing the force measuring element; and measuring the value.

[0005] The testing device in the aforementioned patent has a fixed angle and is not very flexible. Therefore, it is necessary to design a UAV motor propeller tension testing device that can perform static ground tension testing and vehicle-mounted dynamic tension testing at different angles to obtain accurate tension parameters. Utility Model Content

[0006] To address the aforementioned issues, the present invention aims to design a tensile testing device for UAV motor propellers, capable of conducting static tensile tests on the ground and dynamic tensile tests on a vehicle at different angles, in order to obtain accurate tensile parameters.

[0007] To achieve the above objectives, this application proposes a test device for the tensile force of a UAV motor propeller, the device comprising a base, a test structure, and a tilting structure;

[0008] The test structure and tilting structure are installed on the upper end of the base; the base provides an installation platform for the test structure and tilting structure and is the basic component of the entire test device.

[0009] The test structure includes a mounting base, tension shaft, torsion bar, mounting plate, sensor, mounting support, surface bearing, sliding bearing, special pin, and mounting base.

[0010] The sensor in the test structure is connected to the motor and blade under test by bolts, and the torque and tension of the motor and blade under test are measured by the sensor.

[0011] The tilting structure includes a connecting rod, an angle fixer, a rotating support, and a fixed base;

[0012] The connecting rod connects the test structure and the tilting structure to enable multi-angle adjustment.

[0013] The base has a trapezoidal structure and is made of square steel and steel plates welded together, providing an installation platform for the test structure and tilting structure.

[0014] In the test structure, the mounting plate is located at the bottom layer, and the mounting base, tension shaft, torsion bar, sensor, mounting support, plane bearing, sliding bearing, special pin, and mounting base are supported above it.

[0015] The two ends of the torsion bar are connected to the sensor and the mounting bracket along the axial direction of the motor under test using special pins, and a sliding bearing is provided at the torsion bar connection hole;

[0016] A planar bearing is provided at the connection between the tension shaft and the sensor;

[0017] The tension shaft is positioned and installed using a mounting base;

[0018] A planar bearing is provided at the sensor connection point;

[0019] The mounting base has a sliding bearing installed inside.

[0020] The torsion bar has a mounting hole at its center for connection to the motor under test;

[0021] The two ends of the torsion bar are connected to the sensor and the mounting bracket along the axial direction of the motor under test using special pins, and a sliding bearing is provided at the torsion bar connection hole.

[0022] The tension shaft is the tension transmission structure generated when the blade under test rotates;

[0023] The front end of the tension shaft is connected to the torsion bar by screws in a "T" shape, and the rear end is connected to the sensor.

[0024] In the tilting structure, the rotating support is a tie rod shaft mounting support. A rotating axis lug is provided on the rotating support to connect with the connecting rod, and a sliding bearing is added at the connection.

[0025] The rotating support is the rotation fulcrum of the test structure and also the support point after the test structure has rotated by an angle;

[0026] The rotating support is a mounting support for the tie rod shaft, and the tie rod shaft is a connecting component for angle transformation;

[0027] The rotating support is provided with a rotating axis lug and a connecting and fixing seat for the tie rod shaft, and a bearing is provided at the connection.

[0028] The rotating support is connected to the angle fixer by a connecting rod;

[0029] The motor under test is connected to the torsion bar by bolts;

[0030] The rotation axis of the motor under test is aligned with the center of the torsion bar and the axis of the tension axis.

[0031] The sensor used is an HBM shear beam load cell with an accuracy of C4.

[0032] Compared with existing technologies, the advantages and effects of this application are as follows:

[0033] 1. This application adopts a mechanical fixed angle difference transformation method for tilt angle transformation. The tilt angle transformation structure can be made to achieve any angle tilt by using a handwheel screw mechanism, or to use a motor-driven screw to achieve controllable tilt angle to any angle value within the tilt angle range, which is flexible.

[0034] 2. The test bench base of this application can be constructed with aluminum profiles according to the testing requirements of the test specimen, and the same force sensor can be used to test the torque and tension of the motor blade at a certain speed and angle, without the need for a dedicated torque sensor. At the same time, the structure is simple and easy to assemble.

[0035] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0036] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0038] in:

[0039] Figure 1 This is a basic structural diagram of the device;

[0040] Figure 2 This is a simplified diagram of the test structure of this device;

[0041] Figure 3 This is a simplified diagram of the tilting structure of the device.

[0042] Figure 4 This is a simplified diagram of the sensor installation for this device;

[0043] Figure 5 This is a simplified diagram of the tension shaft installation for this device;

[0044] Figure 6 This is a schematic diagram of the device tilted at 45°.

[0045] Explanation of reference numerals in the attached drawings: 1-Base; 2-Test structure; 3-Tilting structure; 4-Motor under test; 5-Blade under test; 201-Mounting seat; 202-Tension shaft; 203-Torque bar; 204-Mounting plate; 205-Sensor; 206-Mounting support; 207-Surface bearing; 208-Sliding bearing; 209-Special pin; 210-Mounting base; 301-Connecting rod; 302-Angle fixer; 303-Rotating support; 304-Fixed seat. Specific Implementation

[0047] 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 and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0048] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0049] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0050] In this article, 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 mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it have an "or" relationship.

[0051] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0052] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0053] Example 1

[0054] This embodiment designs a device for testing the tensile strength of a drone motor propeller. Please refer to [reference needed]. Figure 1 As shown, the device includes a base 1, a test structure 2, and a tilting structure 3;

[0055] The test structure 2 and tilting structure 3 are installed on the upper end of the base 1; the motor 4 and the blade 5 to be tested are installed on the test structure 2 to test the torque and tension of the motor 4 and the blade 5 to be tested at a certain speed and angle.

[0056] The test structure 2 is installed at the front end of the tilting structure 3, and the connecting rod 301 connects the test structure 2 and the tilting structure 3.

[0057] The motor under test 4 and the blade under test 5 are installed at the front end of the torsion bar 203 in the test structure 2.

[0058] The base 1 has a trapezoidal structure and is made of square steel and steel plates or aluminum profiles welded together. It provides an installation platform for the test structure and tilting structure, and is the basic component of the entire test device. It provides an installation platform for the test piece installation structure and data acquisition system, and is also the hub connecting to the vehicle body during vehicle-mounted dynamic testing.

[0059] Please refer to Figure 2 As shown, the test structure 2 includes a mounting base 201, a tension shaft 202, a torsion bar 203, a mounting plate 204, a sensor 205, a mounting support 206, a plane bearing 207, a sliding bearing 208, a special pin 209, and a mounting base 210.

[0060] In the test structure 2, the mounting plate 204 is located at the bottom layer, and the mounting base 201, tension shaft 202, torsion bar 203, sensor 205, mounting support 206, plane bearing 207, sliding bearing 208, special pin 209, and mounting base 210 are supported above it.

[0061] The two ends of the torsion bar 203 are connected to the sensor 205 and the mounting bracket 206 along the motor axis by special pins 209, and a sliding bearing 208 is provided at the connection hole of the torsion bar 203;

[0062] A planar bearing 207 is provided at the connection between the tension shaft 202 and the sensor 205 to reduce the influence of torque on the tension measurement.

[0063] The tension shaft 202 is positioned and installed using the mounting base 210, allowing the tension shaft 202 to slide axially on the mounting base 210, thereby reducing the impact of friction on test accuracy.

[0064] A planar bearing 207 is provided at the connection of the sensor 205;

[0065] The mounting base 210 has a sliding bearing 208 installed inside.

[0066] Mounting plate 204 is made of Q235A steel plate and is a load-bearing component for various mounting supports and force transmission shafts.

[0067] Please refer to Figure 3 As shown, the tilting structure 3 includes a connecting rod 301, an angle fixer 302, a rotating support 303, and a fixed base 304.

[0068] The rotating support 303 is the rotation fulcrum of the test structure 2, and also the support point after the test structure 2 has rotated by an angle;

[0069] The rotating support 303 is a mounting support for the tie rod shaft, and the tie rod shaft is a connecting component for angle transformation.

[0070] The rotary support 303 is provided with a rotary axis lug and a connecting and fixing seat 304 for the tie rod shaft, and a bearing is provided at the connection point;

[0071] The rotating support 303 is connected to the angle fixer 302 by a connecting rod 301.

[0072] The technical advantages of this embodiment are as follows: By combining the base, the test structure, and the tilting structure, a tensile testing device for UAV motor propellers is formed, which can accurately perform ground static tensile tests and vehicle-mounted dynamic tensile tests to obtain accurate tensile parameters, and the structure is easy to assemble.

[0073] Example 2

[0074] This embodiment designs a device for testing the tensile strength of a drone motor propeller. Please refer to [reference needed]. Figure 4 As shown, a further design is made based on Example 1.

[0075] In the test structure 2, the mounting plate 204 is located at the bottom layer, and the mounting base 201, tension shaft 202, torsion bar 203, sensor 205, mounting support 206, plane bearing 207, sliding bearing 208, special pin 209, and mounting base 210 are supported above it.

[0076] Torque bar 203 is a component for measuring torque and is used in conjunction with a tension sensor for data acquisition to obtain torque data.

[0077] The two ends of the torsion bar 203 are connected to the sensor 205 and the mounting bracket 206 along the motor axis by special pins 209, and a sliding bearing 208 is provided at the connection hole of the torsion bar 203;

[0078] The torsion bar 203 has a mounting hole at its center position for connection with the motor 4 to be tested;

[0079] The two ends of the torsion bar 203 are connected to the sensor 205 and the mounting bracket 206 along the motor axis using special pins 209, and a sliding bearing 208 is provided at the connection hole of the torsion bar 203.

[0080] The motor under test 4 is connected to the torsion bar 203 by bolts;

[0081] The rotation axis of the motor under test 4 is aligned with the center of the torsion bar 203 and the axis of the tension shaft 202.

[0082] Please refer to Figure 5 As shown, the tension shaft 202 is the tension transmission structure generated when the blade 5 under test rotates;

[0083] The front end of the tension shaft 202 is connected to the torsion bar 203 by screws in a "T" shape, and the rear end is connected to the sensor 205.

[0084] The motor under test 4 is connected to the torsion bar 203 by bolts;

[0085] The rotation axis of the motor under test 4 is aligned with the center of the torsion bar 203 and the axis of the tension shaft 202.

[0086] The sensor 205 is an HBM shear beam load cell with an accuracy of C4.

[0087] The sensor 205 is connected to the motor 4 and the blade 5 under test by bolts.

[0088] Please refer to Figure 6 As shown, the test structure 2 can be connected at 45° via the tilting structure 3. The device can use the same sensor 205 to test the torque and tension of the motor 4 and the blade 5 under test at a certain speed and angle.

[0089] Technical advantages of this embodiment: This application can achieve arbitrary tilting angle by using a handwheel screw mechanism to change the tilting angle according to the usage requirements, or by using a motor-driven screw to control the tilting angle to any angle value within the tilting angle range, which is flexible; and the same force sensor can be used to test the torque and tension of the motor blade at a certain speed and angle, without the need to use a dedicated torque sensor.

[0090] The above description is merely a preferred embodiment of this utility model and does not limit the scope of protection of this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations made to these embodiments within the spirit and principles of this utility model, through conventional substitutions or methods that achieve the same function without departing from the principles and spirit of this utility model, fall within the scope of protection of this utility model.

Claims

1. A device for testing the tensile force of a drone motor propeller, characterized in that, The device includes a base (1), a test structure (2), and a tilting structure (3); The test structure (2) and the tilting structure (3) are installed on the upper end of the base (1); the base (1) provides an installation platform for the test structure (2) and the tilting structure (3) and is the basic component of the entire test device; The test structure (2) includes a mounting base (201), a tension shaft (202), a torsion bar (203), a mounting plate (204), a sensor (205), a mounting support (206), a plane bearing (207), a sliding bearing (208), a special pin (209), and a mounting base (210). The sensor (205) in the test structure (2) is connected to the motor (4) and the blade (5) under test by bolts. The sensor (205) measures the torque and tension of the motor (4) and the blade (5) under test. The tilting structure (3) includes a connecting rod (301), an angle fixer (302), a rotating support (303), and a fixed seat (304); The connecting rod (301) connects the test structure (2) and the tilting structure (3), enabling multi-angle adjustment of the test structure (2).

2. The UAV motor propeller tensile testing device according to claim 1, characterized in that, The base (1) has a trapezoidal structure and is made of square steel and steel plate welded together, providing an installation platform for the test structure and tilting structure.

3. The unmanned aerial vehicle motor propeller tension testing device according to claim 1, characterized in that, In the test structure (2), the mounting plate (204) is located at the bottom layer, and the mounting base (201), tension shaft (202), torsion bar (203), sensor (205), mounting support (206), plane bearing (207), sliding bearing (208), special pin (209), and mounting base (210) are supported above. The two ends of the torsion bar (203) are connected to the sensor (205) and the mounting bracket (206) along the motor axis by special pins (209), and a sliding bearing (208) is provided at the connection hole of the torsion bar (203). A planar bearing (207) is provided at the connection between the tension shaft (202) and the sensor (205); The tension shaft (202) is positioned and installed using a mounting base (210); A planar bearing (207) is provided at the connection of the sensor (205); The mounting base (210) has a sliding bearing (208) installed inside.

4. The UAV motor propeller tensile testing device according to claim 3, characterized in that, The torsion bar (203) has an installation hole at its center position to connect with the motor (4) to be tested.

5. The unmanned aerial vehicle motor propeller tension testing device according to claim 3, characterized in that, The tension shaft (202) is the tension transmission structure generated when the blade (5) under test rotates; The front end of the tension shaft (202) is connected to the torsion bar (203) by screws in a "T" shape, and the rear end is connected to the sensor (205).

6. The unmanned aerial vehicle motor propeller tension testing device according to claim 1, characterized in that, In the tilting structure (3), the rotating support (303) is a support for the installation of the tie rod shaft. A rotating shaft lug is provided on the rotating support (303) to connect with the connecting rod (301), and a sliding bearing (208) is added at the connection.

7. A device for testing the tensile strength of a UAV motor propeller according to any one of claims 1 or 6, characterized in that, The rotating support (303) is the rotation fulcrum of the test structure (2) and also the support point after the test structure (2) has rotated by an angle; The rotating support (303) is a mounting support for the tie rod shaft, and the tie rod shaft is a connecting piece for angle transformation; The rotating support (303) is provided with a rotating axis lug and a connecting fixing seat (304) for the tie rod shaft, and a bearing is provided at the connection.

8. The unmanned aerial vehicle motor propeller tension testing device according to claim 6, characterized in that, The rotating support (303) is connected to the angle fixer (302) by a connecting rod (301).

9. A device for testing the tensile strength of a UAV motor propeller according to any one of claims 1 or 4, characterized in that, The motor under test (4) and the torsion bar (203) are connected by bolts; The rotation axis of the motor under test (4) is aligned with the center of the torsion bar (203) and the axis of the tension shaft (202).

10. A device for testing the tensile force of a UAV motor propeller according to claim 1 or 3, characterized in that, The sensor (205) is an HBM shear beam load cell with an accuracy of C4.

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