Torque test platform of high-rotating-speed brushless motor
By introducing a reduction mechanism into the high-speed motor torque testing platform, the problem of high cost caused by low output torque of high-speed motors is solved, and the accuracy requirements of torque sensors and testing costs are reduced.
Patent Information
- Application Number
- CN202520676550.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-11
AI Technical Summary
High-speed motors have low output torque, which makes traditional torque testing expensive and requires high-precision torque sensors.
A reduction mechanism is adopted, which achieves speed reduction and torque increase through the meshing of a small gear and a large gear, thereby reducing the accuracy requirements of the torque sensor.
The accuracy requirements of the torque sensor have been reduced, achieving cost reduction without affecting functionality.
Smart Images
Figure CN223925883U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of motor torque testing technology, and in particular relates to a torque testing platform for a high-speed brushless motor. Background Technology
[0002] High-speed motors typically refer to motors with high rotational speeds, usually in the tens of thousands of revolutions per minute. They are widely used in mold toys, such as model cars and model airplanes. These motors are characterized by high speed and small size, but their output torque is relatively low, forming a typical high-speed, low-torque characteristic.
[0003] In traditional torque testing, because the output torque value of the motor under test is relatively small, a high-precision torque sensor is required for signal acquisition. However, high-precision torque sensors are expensive, resulting in high torque testing costs. Utility Model Content
[0004] The purpose of this application is to provide a torque testing platform for a high-speed brushless motor. By using a reduction mechanism, the platform achieves the effect of speed reduction and torque increase, thereby reducing the accuracy requirements of the torque sensor and reducing costs.
[0005] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:
[0006] This application provides a torque testing platform for a high-speed brushless motor, including: a base frame, a pinion shaft, a large gear, a large gear shaft, and the motor under test;
[0007] The motor under test is fixed to the base frame with screws, and the shaft of the motor under test is connected to the pinion shaft and fixed radially with screws;
[0008] The pinion shaft meshes with the large gear, the large gear is mounted on the large gear shaft, and the large gear shaft is connected to the torque sensor via a coupling.
[0009] When the motor under test rotates, its shaft drives the pinion shaft to rotate at the same speed. The pinion shaft meshes with the large gear, and after deceleration, the speed is transmitted to the large gear. The large gear drives the large gear shaft to rotate, and the speed is transmitted to the torque sensor through the coupling.
[0010] In some embodiments, the base frame is provided with:
[0011] The first bearing hole and the second bearing hole can respectively accommodate the first bearing and the second bearing;
[0012] Four first threaded holes, four screws can be fixed through the four first through holes of the bearing housing, four support tubes and four first threaded holes;
[0013] Several second through holes are used for fixing to the mounting threaded holes of the motor under test by screws;
[0014] Several countersunk holes are used to secure the device to other equipment with screws.
[0015] The raised plane is used to reduce the planar area between the base frame and the bearing housing.
[0016] In some embodiments, the bearing housing includes:
[0017] The third bearing hole and the fourth bearing hole can accommodate the third bearing and the fourth bearing, respectively;
[0018] The diameter of the first through hole is larger than the screw thread diameter but smaller than the screw head diameter.
[0019] In some embodiments, the pinion shaft has:
[0020] The first tooth is used to mesh with the second tooth of the large gear to achieve the purpose of speed reduction, and its reduction ratio is its gear ratio.
[0021] The first boss is used to install the second bearing, and it has a clearance fit with the bearing.
[0022] The second boss is used to install the fourth bearing, forming a clearance fit, and contains a first bushing between it and the first tooth to prevent the pinion shaft from moving axially.
[0023] The third through hole allows the shaft of the motor under test to pass through, and the third through hole is clearance-fitted with the shaft.
[0024] The third boss is used for axial positioning of the pinion shaft and has a radial threaded hole. It can be tightened with screws to abut against the beveled edge of the motor shaft under test, so that the shaft is fixed to the pinion shaft.
[0025] In some embodiments, the large gear is provided with:
[0026] The central through hole is clearance-fitted with the fourth boss of the large gear shaft;
[0027] The circular recess aligns with the pin groove of the large gear shaft and is fixed to the large gear shaft by means of pins and glue.
[0028] In some embodiments, the large gear shaft is provided with:
[0029] The fifth boss is used to mount the first bearing, with a clearance fit.
[0030] The sixth boss is used for the axial positioning of the large gear shaft and the large gear.
[0031] The fourth boss is used to install the large gear, the second bushing, and the third bearing in sequence;
[0032] The seventh boss is connected to the torque sensor via a coupling.
[0033] In some embodiments, the support tube is a hollow cylinder with an inner diameter larger than the outer diameter of the screw thread.
[0034] In some embodiments, the torque testing platform includes a first bushing sleeved on the pinion shaft and a second bushing sleeved on the large gear shaft, wherein the second bushing sleeve is a hollow cylinder, and the first bushing sleeve has:
[0035] The outer diameter is smaller than the inner ring of the bearing and is used for axial positioning.
[0036] The inner diameter allows passage of a small gear shaft in the middle, forming a clearance fit;
[0037] The eighth boss has an outer diameter smaller than the root of the first tooth of the pinion shaft.
[0038] Compared with the prior art, the beneficial effects of the embodiments of this application are:
[0039] This application provides a torque testing platform for a high-speed brushless motor. By controlling the verticality of the support tube and the flatness of a specific area (protruding plane) of the base frame, the installation accuracy of the bearings at both ends can be improved. At the same time, it has the characteristics of deceleration and torque increase, which can reduce the accuracy requirements of the torque sensor, thereby achieving the purpose of cost reduction without affecting the function. Attached Figure Description
[0040] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0041] Figure 1 This paper shows a schematic diagram of the structure of a torque testing platform for a high-speed brushless motor provided in an embodiment of this application;
[0042] Figure 2 An exploded view of a torque testing platform for a high-speed brushless motor provided in an embodiment of this application is shown.
[0043] Figure 3 A schematic diagram of the base frame provided in an embodiment of this application is shown;
[0044] Figure 4 Another structural schematic diagram of the base frame provided in an embodiment of this application is shown;
[0045] Figure 5 A schematic diagram of the bearing housing provided in an embodiment of this application is shown;
[0046] Figure 6A schematic diagram of the pinion shaft provided in an embodiment of this application is shown;
[0047] Figure 7 A schematic diagram of the structure of the large gear provided in an embodiment of this application is shown;
[0048] Figure 8 A schematic diagram of the structure of the large gear shaft provided in an embodiment of this application is shown;
[0049] Figure 9 A schematic diagram of the installation of the large gear and large gear shaft provided in an embodiment of this application is shown;
[0050] Figure 10 A schematic diagram of the structure of the bushing provided in an embodiment of this application is shown;
[0051] Figure 11 A schematic diagram of the structure of the motor under test provided in an embodiment of this application is shown.
[0052] Illustration:
[0053] 100, Base frame; 200, Bearing housing; 300, Pinion shaft; 400, Large gear; 500, Large gear shaft; 600, Support tube; 700, Screw; 1000, Motor under test. Detailed Implementation
[0054] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0055] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0056] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0057] To illustrate the technical solution described in this application, specific embodiments are provided below.
[0058] Please see Figure 1 and Figure 2As shown in the figure, this application embodiment provides a torque testing platform for a high-speed brushless motor, including: a base frame 100, a bearing housing 200, a pinion shaft 300, a large gear 400, a large gear shaft 500, a support tube 600, screws 700, multiple bushings, multiple bearings, and a motor under test 1000. The motor under test 1000 is a high-speed brushless motor.
[0059] In some embodiments, please refer to Figures 1 to 4 as well as Figure 11 As shown, the base frame 100 is equipped with:
[0060] The first bearing hole 110 and the second bearing hole 120 can respectively accommodate the first bearing 920 and the second bearing 930;
[0061] Four first threaded holes 130 and four screws 700 can be fixed through four first through holes 230 of the bearing housing 200 and four support tubes 600 and four first threaded holes 130;
[0062] Several second through holes 140 are used to fix the motor 1000 under test to the mounting threaded holes 1010 by screws;
[0063] Several countersunk holes 150 are used to fix the base frame 100 to other equipment by screws.
[0064] The raised plane 160 is used to reduce the plane area of the base frame 100 and the bearing seat 200, which can improve the flatness of the machining and achieve a high precision effect.
[0065] In some embodiments, please refer to Figure 5 As shown, the bearing housing 200 includes:
[0066] The third bearing hole 210 and the fourth bearing hole 220 can respectively accommodate the third bearing 910 and the fourth bearing 940;
[0067] The first through hole 230 has a diameter larger than the thread diameter of screw 700 but smaller than the head diameter of screw 700.
[0068] In some embodiments, please refer to Figure 6 As shown, the pinion shaft 300 has:
[0069] The first tooth 310 is used to mesh with the second tooth 410 of the large gear 400 to achieve the purpose of speed reduction, and its reduction ratio is its gear ratio.
[0070] The first boss 320 is used to install the second bearing 930, and is clearance-fitted with it.
[0071] The second boss 330 is used to install the fourth bearing 940, forming a clearance fit, and contains a first bushing 810 between it and the first tooth 310, so that the pinion shaft 300 will not move axially.
[0072] The third through hole 340 allows the shaft of the tested motor 1000 to pass through, and the third through hole 340 is clearance-fitted with the shaft.
[0073] The third boss 350 is used for axial positioning of the pinion shaft 300, and it contains a radial threaded hole. It can be tightened with screws to abut against the shaft bevel 1020, so that the shaft is fixed to the pinion shaft 300.
[0074] In some embodiments, please refer to Figure 7 As shown, the large gear 400 is equipped with:
[0075] The central through hole 420 is clearance-fitted with the fourth boss 540 of the large gear shaft 500;
[0076] The circular recess 430 is used to align with the pin groove 530 of the large gear shaft 500, and is fixed to the large gear 400 and the large gear shaft 500 by means of pins and glue.
[0077] In some embodiments, please refer to Figure 8 As shown, the large gear shaft 500 is provided with:
[0078] The fifth boss 510 is used to mount the first bearing 920, with a clearance fit;
[0079] The sixth boss 520 is used for axial positioning of the large gear shaft 500 and the large gear 400.
[0080] The fourth boss 540 is used to install the large gear 400, the second bushing 820 and the third bearing 910 in sequence.
[0081] The seventh boss 550 is connected to the torque sensor via a coupling.
[0082] In some embodiments, the support tube 600 is a hollow cylinder with an inner diameter larger than the threaded outer diameter of the screw 700, and both ends of the support tube 600 have a high degree of perpendicularity to the central axis.
[0083] In some embodiments, please refer to Figure 2 , Figure 9 and Figure 10 As shown, the plurality of bushings includes: a first bushing 810 sleeved on the pinion shaft 300 and a second bushing 820 sleeved on the gear shaft 500. The second bushing 820 is a hollow cylinder, and the first bushing 810 has:
[0084] With an outer diameter of 812, smaller than the bearing inner ring, it is used for axial positioning.
[0085] The inner diameter is 813, and the small gear shaft 300 can pass through in the middle, forming a clearance fit;
[0086] The eighth boss 811 has an outer diameter smaller than the root of the first tooth 310 of the pinion shaft 300.
[0087] The working principle of the torque testing platform for the above-mentioned high-speed brushless motor is as follows:
[0088] The motor under test 1000 is fixed to the base frame 100 with screws. The first bearing 920 and the second bearing 930 are also fixed to the base frame 100. The pinion shaft 300 is installed inside the second bearing 930, and the shaft of the motor under test 1000 passes through the pinion shaft 300 and is radially fixed with screws. The first bushing 810 passes through the pinion shaft 300. The large gear shaft 500 is installed inside the first bearing 920, and the large gear 400 and the third bearing 910 pass through the large gear shaft 500 in sequence. Screws 700 are then used to fix the motor under test to the base frame 100 through the bearing housing 200 (containing the third bearing 910 and the fourth bearing 940) and the support tube 600 in sequence.
[0089] When the tested motor 1000 rotates, its shaft drives the pinion shaft 300 to rotate at the same speed. The pinion shaft 300 meshes with the large gear 400. After deceleration, the speed is transmitted to the large gear 400. The large gear 400 drives the large gear shaft 500 to rotate and transmits the speed to the torque sensor through the coupling.
[0090] The torque testing platform for a high-speed brushless motor provided in this application embodiment can improve the installation accuracy of the bearings at both ends by controlling the verticality of the support tube 600 and the flatness of a specific area (protruding plane 160) of the base frame 100. At the same time, it has the characteristics of deceleration and torque increase, which can reduce the accuracy requirements of the torque sensor, thereby achieving the purpose of cost reduction without affecting the function.
[0091] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A torque testing platform for a high-speed brushless motor, characterized in that, include: The base frame (100), pinion shaft (300), large gear (400), large gear shaft (500), and the motor under test (1000). The motor under test (1000) is fixed to the base frame (100) with screws. The shaft of the motor under test (1000) is connected to the pinion shaft (300) and is fixed radially with screws. The pinion shaft (300) meshes with the large gear (400), the large gear (400) is mounted on the large gear shaft (500), and the large gear shaft (500) is connected to the torque sensor via a coupling; When the motor under test (1000) rotates, its shaft drives the pinion shaft (300) to rotate at the same speed. The pinion shaft (300) meshes with the large gear (400), and after deceleration, it is transmitted to the large gear (400). The large gear (400) drives the large gear shaft (500) to rotate, and transmits the torque to the torque sensor through the coupling.
2. The torque testing platform according to claim 1, characterized in that, The base frame (100) is provided with: The first bearing hole (110) and the second bearing hole (120) can respectively accommodate the first bearing (920) and the second bearing (930). The screw (700) can be fixed through the first through hole (230) of the bearing housing (200) and the support tube (600) to the first threaded hole (130); Several second through holes (140) are used for mounting threaded holes (1010) of the motor under test (1000) by screws. Several countersunk holes (150) are used to fix the device to other equipment with screws; The raised plane (160) is used to reduce the planar area of the base frame (100) and the bearing housing (200).
3. The torque testing platform according to claim 1, characterized in that, The bearing housing (200) includes: The third bearing hole (210) and the fourth bearing hole (220) can respectively accommodate the third bearing (910) and the fourth bearing (940). The diameter of the first through hole (230) is greater than the thread diameter of the screw (700) and less than the head diameter of the screw (700).
4. The torque testing platform according to claim 1, characterized in that, The pinion shaft (300) has: The first tooth (310) is used to mesh with the second tooth (410) of the large gear (400) to achieve the purpose of speed reduction, and its speed reduction ratio is its tooth ratio; The first boss (320) is used to install the second bearing (930), and is clearance-fitted with it; The second boss (330) is used to install the fourth bearing (940) with a clearance fit, and contains a first bushing (810) between it and the first tooth (310) to prevent the pinion shaft (300) from moving axially. The third through hole (340) allows the shaft of the motor (1000) under test to pass through, and the third through hole (340) is clearance-fitted with the shaft; The third boss (350) is used for axial positioning of the pinion shaft (300), and it has a radial threaded hole. It can be tightened by screws to abut against the shaft bevel (1020) of the motor under test (1000), so that the shaft is fixed to the pinion shaft (300).
5. The torque testing platform according to claim 1, characterized in that, The large gear (400) is equipped with: The central through hole (420) is clearance-fitted with the fourth boss (540) of the large gear shaft (500); A circular recess (430) is aligned with the pin groove (530) of the large gear shaft (500) and is fixed to the large gear (400) by means of pins and glue.
6. The torque testing platform according to claim 1, characterized in that, The large gear shaft (500) is provided with: The fifth boss (510) is used to install the first bearing (920) with a clearance fit; The sixth boss (520) is used for axial positioning of the large gear shaft (500) and the large gear (400); The fourth boss (540) is used to install the large gear (400), the second bushing (820) and the third bearing (910) in sequence. The seventh boss (550) is connected to the torque sensor via a coupling.
7. The torque testing platform according to claim 1, characterized in that, The support tube (600) is a hollow cylinder with an inner diameter larger than the outer diameter of the screw (700).
8. The torque testing platform according to claim 1, characterized in that, It includes a first bushing (810) fitted onto the pinion shaft (300) and a second bushing (820) fitted onto the gear shaft (500), wherein the second bushing (820) is a hollow cylinder, and the first bushing (810) has: The outer diameter (812) is smaller than the inner ring of the bearing and is used for axial positioning. The inner diameter is (813), and a small gear shaft (300) can pass through it in the middle, forming a clearance fit; The eighth boss (811) has an outer diameter smaller than the root of the first tooth (310) of the pinion shaft (300).