Adaptive clamping brushless motor rotor dynamic balancing device

Abstract

The application discloses a self-adaptive clamping brushless motor rotor dynamic balancing device, which comprises a base plate, a first rack and a second rack are fixedly arranged on the base plate, a fixing frame is arranged on the first rack, a first clamping piece is arranged on the fixing frame, a movable frame is arranged on the second rack, and a second clamping piece is arranged on the movable frame. The application relates to the technical field of dynamic balancing test and processing, adopts a split type structure of fixed end elastic centering clamping combined with movable end servo adjustable clamping, can self-adaptively adjust the clamping distance between two ends, can self-adaptively adapt to brushless motor rotors with different axial lengths, and can quickly complete multi-model rotor change detection operation without replacing tooling fixtures and recalibrating equipment references through the left end six-petal elastic clamping block structure and the right end ball elastic compensation structure which can self-adaptively adapt to rotors with different shaft diameters within a certain tolerance range.

Description

Technical Field

[0001] This invention relates to the field of rotor dynamic balancing testing and processing technology, specifically to an adaptive clamping brushless motor rotor dynamic balancing device. Background Technology

[0002] Brushless motors, with their advantages of high efficiency, low noise, long lifespan, no electrical sparks, and strong controllability, are widely used in many fields such as new energy equipment, smart homes, industrial transmissions, aerospace models, and precision instruments. As the core rotating component of a brushless motor, the uniformity of its mass distribution directly determines the vibration, noise, operational stability, and service life of the entire motor. During the rotor manufacturing process, factors such as core stacking errors, uneven injection molding, magnet bonding deviations, and shaft machining tolerances commonly cause mass eccentricity issues in rotors. When the rotor rotates at high speed, it generates periodic centrifugal vibrations, leading to defects such as motor vibration, excessive noise, accelerated bearing wear, and decreased output efficiency. In severe cases, it can cause the motor to seize or burn out. Therefore, brushless motor rotors must undergo high-precision dynamic balancing and calibration before leaving the factory.

[0003] Currently, most traditional rotor dynamic balancing clamping devices in the industry use top-mounted clamping fixtures, which have extremely poor versatility. They are mostly custom-designed structures with fixed clamping spacing and hole diameters, only suitable for rotors of a single length and shaft diameter. When producing multiple models of brushless motor rotors, companies need to frequently change tooling fixtures and recalibrate equipment references. This not only makes the changeover process cumbersome, time-consuming, and labor-intensive, significantly reducing production and testing efficiency, but also allows for repeated disassembly and calibration, which can lead to equipment reference misalignment, affecting testing accuracy and increasing production and equipment maintenance costs.

[0004] In practical production applications, the top-clamping structure is not easy to center and is prone to axial displacement. It cannot truly reproduce the unbalanced mass characteristics of the rotor itself, resulting in a large deviation between the test results and the actual working conditions. Even after dynamic balancing correction, the rotor still has problems with excessive vibration and noise after installation, which restricts the production quality and efficiency of high-precision dynamic balancing test of brushless motor rotors. Therefore, it is necessary to develop an adaptive clamping brushless motor rotor dynamic balancing device that can adapt to multiple rotor specifications, has high centering accuracy, low rotational resistance, no interference during testing, and is convenient to operate. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an adaptive clamping dynamic balancing device for brushless motor rotors. This device solves the problem that existing brushless motor rotor dynamic balancing test devices are prone to axial displacement due to their clamping mechanism, which fails to accurately reproduce the rotor's inherent mass imbalance characteristics, resulting in significant deviations between test results and actual operating conditions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adaptive clamping brushless motor rotor dynamic balancing device, comprising a base plate, wherein a first frame and a second frame are fixedly disposed opposite to each other on the base plate; A fixing frame is provided on the first frame, and a first clamping member is provided on the fixing frame; The first clamping member includes a first connecting seat, a first cylindrical member fixed to the front side of the first connecting seat, an opening on the front side of the first cylindrical member, a first inner cylinder rotatably connected inside the first cylindrical member through a bearing, a plurality of clamping blocks arranged in a complete circle inside the first inner cylinder, an elastic clamping ring arranged on the outer side of the clamping blocks, and a first insertion cavity formed at the center of the plurality of clamping blocks. The second frame is provided with a movable frame, and the movable frame is provided with a second clamping member; The second clamping member includes a second connecting seat, a clamping cylinder is fixed to the front side of the second connecting seat, the front end of the clamping cylinder is open and the rear end is blocked by the second connecting seat, and a second insertion cavity is formed inside, and the inner wall of the clamping cylinder is circumferentially provided with balls; The second frame has a back connecting plate on its back, and an electric cylinder is provided on the back connecting plate. The movable frame can be driven by the electric cylinder to move closer to or away from the fixed frame.

[0007] Preferably, the fixing frame includes a first upper frame and a first lower frame fixed to the first frame, and a first front support plate is connected to the front side of the first upper frame and the first lower frame; The first upper frame is provided with a first back plate, and the first connecting seat of the first clamping member is fixed to the first back plate.

[0008] Preferably, the movable frame includes a second upper frame and a second lower frame arranged vertically, a second front support plate is provided on the front side of the second upper frame and the second lower frame, and the side walls of the second upper frame and the second lower frame are slidably connected to the second frame by slide rails. The second upper frame is provided with a second back plate at its top, and the second clamping member is fixed to the second back plate.

[0009] Preferably, both the first front support plate and the second front support plate have an upward-facing V-shaped opening at their top.

[0010] Preferably, some of the clamps are located on one side of the opening and tilted outward to form a horn-shaped cavity.

[0011] Preferably, the inner ring of the first inner cylinder has a matching groove that can accommodate the elastic clamping ring.

[0012] Preferably, the elastic clamping ring includes a fitting portion that fits against each clamping block and an arc-shaped protrusion connecting two adjacent fitting portions, wherein the fitting portion is arc-shaped and located on the same virtual circle.

[0013] Preferably, the clamping cylinder includes a second inner cylinder and a second cylindrical member disposed inside and outside the cylinder, the second cylindrical member being fixed to the second connecting seat, and an inner cavity being formed between the second inner cylinder and the second cylindrical member; A retainer is provided on the second inner cylinder, and the ball is located inside the retainer; a support seat is provided on the part of the ball located in the inner cavity, and a spring is provided on the other side of the support seat. The spring includes a spherical protrusion and a connecting part, and the connecting part abuts against the inner wall surface of the second cylindrical part.

[0014] Preferably, the support base is provided with a front groove and a rear groove on both sides, the front groove is in contact with the ball, and the rear groove is in contact with the spherical protrusion of the spring.

[0015] The beneficial effects of the present invention are as follows: By using the adaptive clamping dynamic balancing device for brushless motor rotor provided by the present invention, the following technical effects are achieved: 1. It adopts a split structure with fixed end elastic centering clamping and movable end servo adjustable clamping, which can adaptively adjust the clamping distance at both ends and adapt to brushless motor rotors with different axial lengths; at the same time, the six-petal elastic clamping block structure on the left end and the ball elastic compensation structure on the right end can adapt to rotors with different shaft diameters within a certain tolerance range. There is no need to change tooling fixtures or recalibrate the equipment reference, and multiple rotor type changeover testing operations can be completed quickly.

[0016] 2. The left end adopts a flexible clamping structure with six clamping blocks evenly arranged in a ring. Compared with the traditional three-point and four-point clamping structures, the six-point clamping can achieve uniform force in all directions around the rotor end. Combined with the uniform clamping force of the elastic clamping ring, it automatically compensates for shaft diameter machining tolerances and assembly clearances, realizing high-precision automatic centering of the rotor and eliminating problems such as rotor clamping eccentricity, radial runout, and swaying from the source. At the same time, the arc-shaped protrusion of the elastic clamping ring can evenly distribute elastic stress, ensuring that the clamping force of each clamping block is consistent, and the clamping stability is extremely strong. It effectively avoids the fluctuation of test data caused by human clamping deviation and structural clearance, and greatly improves the accuracy and repeatability of dynamic balance test data.

[0017] 3. The right end adopts a ball bearing combined with a spring sheet adaptive elastic rolling support structure, which replaces the traditional rigid sliding friction with high-precision pure rolling friction, greatly reducing the rotor rotation resistance and eliminating jamming, obstruction, and additional frictional vibration interference. At the same time, the adaptive compensation structure of the spring sheet and the support seat ensures that the ball bearing is always in close contact with the outer wall of the rotor shaft. While ensuring precise positioning without gaps, it preserves the rotor's own rotational vibration characteristics to the greatest extent, completely solving the problems of high resistance, distorted working conditions, and large deviations in test results of traditional clamping structures. It accurately restores the inherent imbalance of the rotor and ensures that the dynamic balance test data is true, accurate, and reliable. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the first clamping member of the present invention; Figure 3 This is a front view of the first clamping member of the present invention; Figure 4 For the present invention Figure 3 Sectional view along line AA; Figure 5 This is a schematic diagram of the three-dimensional structure of the elastic clamping ring of the present invention; Figure 6 This is a front view of the elastic clamping ring of the present invention; Figure 7 This is a three-dimensional structural diagram of the second clamping member of the present invention; Figure 8 This is a front view of the second clamping member of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point a.

[0019] Explanation of reference numerals in the figures: 1. Base plate; 2. First frame; 3. Second frame; 4. First upper frame; 5. First lower frame; 6. First back plate; 7. First clamping member; 71. First cylindrical member; 72. First connecting seat; 73. Clamping block; 74. First inner cylinder; 75. Bearing; 76. First insertion cavity; 77. Speaker insertion cavity; 78. Adaptive groove; 79. Elastic clamping ring; 791. Fitting part; 792. Arc-shaped protrusion; 710. Opening; 8. First front support plate; 9. 10. V-shaped opening; 11. Second upper frame; 12. Second lower frame; 13. Back connecting plate; 14. Electric cylinder; 15. Second front support plate; 16. Second back plate; 17. Second clamping component; 18. Second connecting seat; 19. Second cylindrical component; 10. Second inner cylinder; 11. Second insertion cavity; 12. Inner cavity; 13. Ball bearing; 14. Support seat; 15. Front groove; 16. Rear groove; 16. Spring piece; 17. Cage; 18. Slide rail. Detailed Implementation

[0020] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation schemes as long as the function of the present invention can be brought into play.

[0022] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0023] This embodiment discloses an adaptive clamping dynamic balancing device for a brushless motor rotor, such as... Figure 1 As shown, the device includes a substrate 1, on which a first frame 2 and a second frame 3 are fixedly disposed opposite to each other, and the first frame 2 and the second frame 3 form a placement space for placing the rotor of the brushless motor.

[0024] like Figure 1 As shown, a fixing frame is provided on the first frame 2. The fixing frame includes a first upper frame 4 and a first lower frame 5 fixed to the first frame 2. A first front support plate 8 is connected to the front side of the first upper frame 4 and the first lower frame 5. The first upper frame 4, the first lower frame 5 and the first front support plate 8 are fixedly connected to form a whole. A first clamping member 7 is provided on the fixing frame. The first clamping member 7 is used to place one end of the brushless motor rotor. A first back plate 6 is provided on the top of the first upper frame 4. The first back plate 6 is L-shaped.

[0025] like Figures 2 to 4 As shown, the first clamping member 7 includes a first connecting seat 72, which is fixed to the vertical end of the first back plate 6. A first cylindrical member 71 is fixed to the front side of the first connecting seat 72, and an opening 710 is provided on the front side of the first cylindrical member 71 for inserting one end of the brushless motor rotor. A first inner cylinder 74 is rotatably connected inside the first cylindrical member 71 via a bearing 75. Several clamping blocks 73 arranged in a complete circle are provided inside the first inner cylinder 74. The bearing 75 in this embodiment is a high-precision silent rolling bearing, which enables the first inner cylinder 74 to rotate without obstruction and with high precision. The frictional resistance is extremely small, and it can rotate synchronously with the brushless motor rotor, avoiding the rotor rotation deviation and dynamic balance detection data distortion caused by friction jamming in traditional fixed clamping structures.

[0026] like Figure 4As shown, the number of clamping blocks 73 is preferably six. An elastic clamping ring 79 is provided on the outer side of the clamping block 73. The inner ring of the first inner cylinder 74 has an adaptation groove 78 that can accommodate the elastic clamping ring 79. The adaptation groove 78 can limit the elastic clamping ring 79 axially and radially, preventing the elastic clamping ring 79 from shifting or falling off during the expansion and contraction of the clamping block 73, and ensuring the stability and continuity of the clamping structure operation. The elastic clamping ring 79 binds the six clamping blocks 73 together and fixes them into one piece. The center of the several clamping blocks 73 surrounds and forms a first insertion cavity 76. One end of the brushless motor rotor is inserted into the first insertion cavity 76. When one end of the brushless motor rotor is inserted into the first insertion cavity 76, it supports the clamping block 73. After the clamping block 73 is supported, it expands outward, causing the elastic clamping ring 79 to undergo elastic deformation. The clamping force of the elastic clamping ring 79 tightly clamps one end of the brushless motor rotor.

[0027] The six clamping blocks 73 mentioned above are evenly distributed in a ring. Compared with the three- or four-block clamping structure, the six-point clamping method can achieve uniform force on the rotor end in the circumference, resulting in higher clamping stability. It can effectively avoid eccentricity and swaying during rotor rotation and is suitable for the end structure of circular shaft rotors.

[0028] Furthermore, several clamping blocks 73 are located on one side of the opening 710 and tilt outward to form a horn-shaped insertion cavity 77, which facilitates the insertion of one end of the brushless motor rotor into the first insertion cavity 76 by sliding along the wall of the horn-shaped insertion cavity 77. The horn-shaped insertion cavity 77 adopts a gradient guide structure with a large inlet and a small inner cavity, which can guide and position the rotor shaft end, reduce the difficulty of rotor loading and placement, and avoid component wear and shaft end scratches caused by the shaft end hitting the end face of the clamping block 73 during manual insertion, thereby improving the ease of operation of the equipment and the service life of the parts.

[0029] like Figure 5 and Figure 6 As shown, in this embodiment, the elastic clamping ring 79 includes a fitting portion 791 that fits against each clamping block 73 and an arc-shaped protrusion 792 connected between two adjacent fitting portions 791. The fitting portion 791 is arc-shaped and located on the same virtual circle. The inner diameter of the virtual circle is equal to the outer diameter of the entire circle formed by the clamping blocks 73. When the clamping block 73 is supported and expands outward, the fitting portion 791 stretches the arc-shaped protrusion 792. The arc-shaped protrusion 792 elastically deforms to adapt to the outward expansion of the fitting portion 791. The clamping force of the arc-shaped protrusion 792 drives the fitting portion 791 to apply a pressing force inward, so that the multiple clamping blocks 73 apply a pressing force inward from the circumference to fix the end of the brushless motor rotor.

[0030] like Figure 1As shown, a movable frame is provided on the second frame 3, and a second clamping component 16 is provided on the movable frame. The second clamping component 16 is used to clamp the other end of the brushless motor rotor. The two-end split clamping structures cooperate with each other, with one end fixed and the other end adaptively adjustable, which can perfectly adapt to brushless motor rotors of different lengths and shaft diameters, breaking the shortcomings of traditional dynamic balancing devices with single clamping specifications and poor versatility.

[0031] In this embodiment, the movable frame includes a second upper frame 10 and a second lower frame 11 arranged vertically. A second front support plate 14 is provided on the front side of the second upper frame 10 and the second lower frame 11. The side walls of the second upper frame 10 and the second lower frame 11 are slidably connected to the second frame 3 via slide rails 17. A back connecting plate 12 is provided on the back of the second frame 3. An electric cylinder 13 is provided on the back connecting plate 12. The output end of the electric cylinder 13 is fixedly connected to the second lower frame 11. In implementation, the movable frame is moved by pushing the output end of the electric cylinder 13, thereby moving closer to or away from the fixed frame, so that the second clamping member 16 can adjust the distance between itself and the first clamping member 7, thereby achieving adaptive clamping of brushless motor rotors of different models and sizes.

[0032] The second upper frame 10 is provided with a second back plate 15 at its top. The second back plate 15 is L-shaped, and the second connecting seat 161 of the second clamping member 16 is fixed to the vertical part of the second back plate 15.

[0033] In this embodiment, both the first front support plate 8 and the second front support plate 14 have upward-facing V-shaped openings 9. The V-shaped openings 9 adopt a symmetrical structural design and have an automatic centering and positioning function. Before the brushless motor rotor is clamped, the shafts at both ends of the brushless motor rotor overlap on the V-shaped openings 9. When the rotor is placed, it can quickly achieve preliminary centering and positioning, effectively reducing the difficulty of manual alignment. At the same time, it can temporarily bear the weight of the rotor, avoiding shaft bending and collision damage caused by the rotor being suspended in the air. It provides a pre-positioning basis for subsequent precise insertion and adaptive clamping, greatly improving the equipment's operating efficiency and clamping accuracy. The shaft at one end of the brushless motor rotor is manually inserted into the first insertion cavity 76. When the second clamping member 16 is pushed by the movable frame through the electric cylinder 13, the shaft at the other end of the brushless motor rotor is inserted into the second clamping member 16.

[0034] like Figure 7 , Figure 8 and Figure 9As shown, in this embodiment, the second clamping member 16 includes a second connecting seat 161 fixed to the second back plate 15. A clamping cylinder is fixed to the front side of the second connecting seat 161. The front end of the clamping cylinder is open and the rear end is blocked by the second connecting seat 161, and a second insertion cavity 164 is formed inside. Ball bearings 166 are arranged circumferentially on the inner wall of the clamping cylinder. In implementation, the shaft at the other end of the brushless motor rotor is inserted into the second insertion cavity 164, and the outer wall surface of the shaft abuts against the ball bearings 166. When the brushless motor rotor is rotated, the shaft at this end rotates on all the ball bearings 166 on the inner wall of the clamping cylinder.

[0035] Specifically, the clamping cylinder mentioned above includes a second inner cylinder 163 and a second cylindrical member 162 disposed inside and outside the cylinder. The second cylindrical member 162 is fixed to the second connecting seat 161. The second inner cylinder 163 and the second cylindrical member 162 are fixed to each other, and an inner cavity 165 is formed between the second inner cylinder 163 and the second cylindrical member 162. The ball bearing 166 is located in the inner cavity 165 and extends out of the second inner cylinder 163.

[0036] Furthermore, a retainer 1611 is provided on the second inner cylinder 163, and the ball bearing 166 is located inside the retainer 1611.

[0037] In addition, a support seat 167 is provided on the part of the ball 166 located in the inner cavity 165 to stabilize the ball 166, and a spring piece 1610 is provided on the other side of the support seat 167. When the shaft at the other end of the brushless motor rotor is inserted into the second insertion cavity 164, the ball 166 is pressed into the inner cavity 165, which drives the support seat 167 to press the spring piece 1610. When the spring piece 1610 deforms, it presses against the ball 166 through its elastic support force, so that the ball 166 is tightly pressed against the outer wall surface of the shaft at the other end of the brushless motor rotor. The spring piece 1610 includes a spherical protrusion and a connecting part, and the connecting part abuts against the inner wall surface of the second cylindrical member 162.

[0038] Furthermore, the support base 167 is provided with a front groove 168 and a rear groove 169 on both sides respectively. The front groove 168 fits into the ball 166, and the rear groove 169 fits into the spherical protrusion of the spring piece 1610.

[0039] The working principle of this device is as follows: the two ends of the rotor of the brushless motor to be tested are manually attached to the V-shaped openings 9 of the first front support plate 8 and the second front support plate 14 respectively. The rotor is initially centered and positioned by relying on the centering characteristics of the V-shaped openings 9. At the same time, one end of the rotor shaft is slid into the first cavity 76 along the horn cavity 77 of the first clamping member 7 to complete the pre-fixation on one side. The servo electric cylinder 13 precisely pushes the movable frame to move horizontally along the slide rail 17, causing the second clamping member 16 to move closer to the other end of the rotor. The shaft at the other end of the rotor is gradually inserted into the second insertion cavity 164. The shaft squeezes the ball bearings 166 of the second clamping member 16, pushing the support seat 167 to compress the spring sheet 1610. Through the elastic reaction force of the spring sheet 1610, the ball bearings 166 tightly fit against the outer wall of the shaft, achieving adaptive clamping at the other end. At the same time, the rotor shaft of the first clamping member 7 opens up six sets of clamping blocks 73. The elastic clamping ring 79 deforms under force and generates a uniform clamping force, circumferentially clamping the rotor end. For rotors with different shaft diameters and different lengths, adaptive fitting can be achieved through the elastic structure and the electric cylinder adjustment structure. Driven by an external drive mechanism, the brushless motor rotor rotates at a constant speed. One end of the rotor rotates synchronously without obstruction through the bearing 75 of the first clamping member 7, while the other end rotates smoothly supported by the rolling balls 166 of the second clamping member 16. The entire process is smooth without jamming, eccentricity, or additional frictional resistance, accurately restoring the rotor's own dynamic balance defects. With the help of an external dynamic balance detection sensor, high-precision dynamic balance detection can be completed. Finally, in the unloading and reset stage, after the detection is completed, the electric cylinder 13 drives the movable frame to move in the opposite direction, increasing the clamping distance at both ends. The clamping structure elastically resets, releasing the clamping limit on the rotor. The inspected rotor can then be easily removed manually. After the equipment is reset, the next batch of rotors can be inspected.

[0040] The basic principles, main features, and advantages of the present invention have been described above. However, the above description is only a specific embodiment of the present invention, and the technical features of the present invention are not limited thereto. Any other embodiments derived by those skilled in the art without departing from the technical solution of the present invention should be covered within the patent scope of the present invention.

[0041] In the description of this invention, each embodiment focuses on its differences from other embodiments, and similar or identical parts between embodiments can be referred to interchangeably. As the apparatus disclosed in the embodiments corresponds to the methods disclosed in the embodiments, the description is relatively simple, and relevant parts can be referred to the method section.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adaptive clamping dynamic balancing device for a brushless motor rotor, characterized in that: Includes a substrate (1), on which a first frame (2) and a second frame (3) are fixedly disposed opposite to each other; A fixing frame is provided on the first frame (2), and a first clamping member (7) is provided on the fixing frame; The first clamping member (7) includes a first connecting seat (72), a first cylindrical member (71) is fixed to the front side of the first connecting seat (72), an opening (710) is opened on the front side of the first cylindrical member (71), a first inner cylinder (74) is rotatably connected inside the first cylindrical member (71) through a bearing (75), a plurality of clamping blocks (73) arranged in a complete circle are provided inside the first inner cylinder (74), an elastic clamping ring (79) is provided on the outer side of the clamping blocks (73), and a first insertion cavity (76) is formed at the center of the plurality of clamping blocks (73). The second frame (3) is provided with a movable frame, and the movable frame is provided with a second clamping member (16). The second clamping member (16) includes a second connecting seat (161), a clamping cylinder is fixed on the front side of the second connecting seat (161), the front end of the clamping cylinder is open and the rear end is blocked by the second connecting seat (161), and a second insertion cavity (164) is formed inside. The inner wall of the clamping cylinder is circumferentially provided with balls (166). The second frame (3) has a back connecting plate (12) on its back, and an electric cylinder (13) is provided on the back connecting plate (12). The movable frame can be driven by the electric cylinder (13) to move closer to or away from the fixed frame. The clamping cylinder includes a second inner cylinder (163) and a second cylindrical member (162) with inner and outer sleeves. The second cylindrical member (162) is fixed to the second connecting seat (161), and an inner cavity (165) is formed between the second inner cylinder (163) and the second cylindrical member (162). A retainer (1611) is provided on the second inner cylinder (163), and the ball (166) is located inside the retainer (1611); a support seat (167) is provided on the part of the ball (166) located in the inner cavity (165), and a spring piece (1610) is provided on the other side of the support seat (167). The spring piece (1610) includes a spherical protrusion and a connecting part, and the connecting part abuts against the inner wall surface of the second cylindrical part (162).

2. The adaptive clamping brushless motor rotor dynamic balancing device according to claim 1, characterized in that: The fixed frame includes a first upper frame (4) and a first lower frame (5) fixed to the first frame (2), and a first front support plate (8) is connected to the front side of the first upper frame (4) and the first lower frame (5). The first upper frame (4) is provided with a first back plate (6) at the top, and the first connecting seat (72) of the first clamping member (7) is fixed to the first back plate (6).

3. The adaptive clamping brushless motor rotor dynamic balancing device according to claim 2, characterized in that: The movable frame includes a second upper frame (10) and a second lower frame (11) arranged vertically. A second front support plate (14) is provided on the front side of the second upper frame (10) and the second lower frame (11). The side walls of the second upper frame (10) and the second lower frame (11) are slidably connected to the second frame (3) via slide rails (17). The second upper frame (10) is provided with a second back plate (15) at the top, and the second clamping member (16) is fixed to the second back plate (15).

4. The adaptive clamping brushless motor rotor dynamic balancing device according to claim 3, characterized in that: The top of both the first front support plate (8) and the second front support plate (14) has an upward-facing V-shaped opening (9).

5. The adaptive clamping brushless motor rotor dynamic balancing device according to claim 1, characterized in that: Several of the clamps (73) are located on one side of the opening (710) and tilted outward to form a horn cavity (77).

6. The adaptive clamping brushless motor rotor dynamic balancing device according to claim 1, characterized in that: The inner ring of the first inner cylinder (74) has an adapter groove (78) that can accommodate the elastic clamping ring (79).

7. The adaptive clamping brushless motor rotor dynamic balancing device according to claim 1, characterized in that: The elastic clamping ring (79) includes a fitting portion (791) that fits against each clamping block (73) and an arc-shaped protrusion (792) connecting two adjacent fitting portions (791). The fitting portions (791) are arc-shaped and located on the same virtual circle.

8. The adaptive clamping brushless motor rotor dynamic balancing device according to claim 1, characterized in that: The support base (167) is provided with a front groove (168) and a rear groove (169) on both sides respectively. The front groove (168) fits into the ball (166), and the rear groove (169) fits into the spherical protrusion of the spring piece (1610).

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