Small ball sorting machine for grinding ball production

Abstract

The invention provides a small ball sorting machine for grinding ball production, and relates to the technical field of grinding ball production, the small ball sorting machine comprises a sorting cavity, and the inner side wall of the sorting cavity protrudes inwards to form a radian part; the movable frame plate is elastically hinged in the sorting cavity, the free end of the movable frame plate is in sliding contact with the inner curved surface of the radian part, and in a non-working state, the length direction of the movable frame plate and the radian direction of the radian part are horizontally arranged. Through forced reciprocating swing of the movable frame plate, active rotation of the cleaning curved surface and periodic waveform disturbance generated by the active rotation in the swing inclination direction, the three parts spontaneously cooperate in time and space through a mechanical structure, and a dynamic composite friction effect which changes continuously and has multiple action directions is formed on the cleaning curved surface; therefore, efficient, uniform and dead-corner-free deep cleaning of the surfaces of the small balls is achieved, and the technical problem that the follow-up sorting precision is affected due to the fact that the measured diameters of the small balls are not accurate due to surface impurity attachment is solved.

Description

Technical Field

[0001] This invention relates to the field of grinding ball production technology, and in particular to a small ball sorting machine for grinding ball production. Background Technology

[0002] In the automated production of grinding balls, the dimensional accuracy and consistency of the final product are core quality indicators. Therefore, at the end of the process, high-precision sorting equipment is required to classify the balls according to their diameter. However, during the initial processing, heat treatment, and transportation, the surface of the grinding balls is highly susceptible to the adhesion of oil, oxide scale, abrasive dust, or micro-burrs. Although these deposits are microscopic, they can significantly increase the measured diameter of the balls, leading to misjudgment by the sorting equipment. This can result in qualified balls being mistakenly classified as larger diameter balls, severely impacting sorting accuracy and yield.

[0003] Currently, the common pretreatment method is to add a separate cleaning or wiping process before sorting. However, this method has problems such as large equipment footprint, high energy consumption, incomplete cleaning, or potential secondary pollution. Some sorting equipment has also attempted to integrate cleaning functions, but most of them use fixed brush scraping or unidirectional rotation cleaning. The cleaning effect is not uniform and the effect on removing pits and firmly attached impurities on the spheres is limited, making it impossible to achieve comprehensive and refined treatment of the sphere surface. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a small ball sorting machine for grinding ball production, which solves the technical problems mentioned in the background section.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a small ball sorting machine for grinding ball production, comprising:

[0006] The sorting chamber has an inwardly convex inner wall forming an arc-shaped section.

[0007] The movable frame plate is elastically hinged in the sorting cavity. The free end of the movable frame plate slides in contact with the inner curved surface of the arc portion. In the non-working state, the length direction of the movable frame plate is horizontally aligned with the arc direction of the arc portion.

[0008] Several brush rollers are equidistantly arranged in the frame cavity along the length of the movable frame plate. The flexible bristles of adjacent brush rollers interlock and mesh to form a continuous cleaning surface. When the workpiece impacts the cleaning surface, the free end of the movable frame plate is forced to slide along the inner curved surface of the arc portion, forming a reciprocating swing of a dynamic fan-shaped trajectory.

[0009] The driving components are symmetrically arranged in the sorting cavity and located on both sides of the hinge end of the movable frame plate. They work in conjunction with the reciprocating swing of the movable frame plate to drive each of the brush rollers to rotate, so that the cleaning surface generates waveform disturbance relative to the swing tilt direction of the movable frame plate, thereby forming a dynamic composite friction effect.

[0010] Preferably, the axes of adjacent brush rollers are parallel to each other, and an X-shaped cleaning groove is formed between them extending along the roller axis direction.

[0011] Preferably, a protective cover is provided at the bottom of the movable frame plate along its length direction, and the protective cover is composed of multiple arc-shaped segments and multiple horizontal segments arranged alternately along the axial direction of the brush roller.

[0012] Preferably, the concave arc surface of each arc segment covers at least one-fifth of the circumferential area of ​​the outer flexible bristle region in the radial direction of the corresponding brush roller, forming a local constraint region for the corresponding brush roller. When the brush roller rotates, the flexible bristles entering the local constraint region are touched by the concave arc surface and undergo dynamic flexural deformation.

[0013] Preferably, each of the horizontal segments and the corresponding Λ-shaped area of ​​the X-shaped cleaning groove together form a triangular release space. When the dynamically flexing and deforming flexible bristles rotate into the triangular release space, they elastically recover and form a high-frequency vibration.

[0014] Preferably, an arc-shaped elastic airbag is provided at the angle between the bottom of the hinge end of the movable frame plate and the inner sidewall of the sorting chamber. The multiple one-way suction ends of the elastic airbag are connected to the corresponding triangular release spaces, and the one-way exhaust end of the elastic airbag extends to the outside of the sorting chamber. When the movable frame plate swings back and forth, it forms a cleaning airflow on the flexible bristles that vibrate at high frequency in the triangular release space.

[0015] Preferably, a guide plate is elastically hinged at the bottom of the feed inlet in the sorting chamber. In the initial state, the guide plate forms an acute angle with the cleaning surface, and a material drop gap is left between the free end and the top of the cleaning surface.

[0016] Preferably, the two arc-shaped extension ends of the inner wall of the sorting cavity located in the arc section are symmetrically fitted with stop plates.

[0017] By employing the above technical solution, the present invention provides a small ball sorting machine for grinding ball production, which has at least the following beneficial effects:

[0018] This invention combines a movable frame plate with an elastic hinge and free end constrained by a curved surface, several brush rollers forming a continuous cleaning surface with interlocking flexible bristles, and a drive component that works in conjunction with the movable frame plate to drive the brush rollers. This allows the movable frame plate to automatically generate and maintain the dynamic coupling of three core motions under the impact of a small ball: the forced reciprocating oscillation of the movable frame plate, the active rotation of the cleaning surface, and the resulting periodic waveform disturbance along the oscillation tilt direction. These three motions spontaneously coordinate in time and space through the mechanical structure, forming a continuously changing dynamic composite friction effect with multiple directions of action on the cleaning surface. This achieves efficient, uniform, and thorough deep cleaning of the small ball surface, solving the technical problem of inaccurate small ball diameter measurement and its impact on subsequent sorting accuracy caused by surface impurities. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a partial three-dimensional structural diagram of the present invention;

[0022] Figure 3 For the present invention Figure 2 Front view plan structural diagram;

[0023] Figure 4 This is a three-dimensional structural diagram of the driving component of the present invention;

[0024] Figure 5 This is a schematic diagram of the front plan view of the protective cover of the present invention;

[0025] Figure 6 This is a schematic planar view of the working state of the brush roller in the arc segment of the present invention.

[0026] In the diagram: 1. Sorting chamber; 11. Curved section; 2. Movable frame plate; 3. Brush roller; 31. X-shaped cleaning groove; 4. Drive component; 41. Main gear; 42. Curved groove; 43. Curved rack; 44. Driven wheel; 45. Driven wheel; 5. Protective cover; 51. Curved section; 52. Horizontal section; 6. Elastic airbag; 7. Guide plate; 8. Stop plate. Detailed Implementation

[0027] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please refer to Figures 1-6 This embodiment proposes a ball sorting machine for ball grinding production, comprising:

[0029] The sorting chamber 1 has an inwardly protruding arcuate portion 11 on its inner wall;

[0030] The movable frame plate 2 is elastically hinged in the sorting cavity 1. The outer wall of the hinge end of the movable frame plate 2 is symmetrically fitted with torsion springs. The free end of the movable frame plate 2 slides in contact with the inner curved surface of the arc part 11. In the non-working state, the length direction of the movable frame plate 2 is horizontally aligned with the arc direction of the arc part 11.

[0031] Several brush rollers 3 are equidistantly arranged in the frame cavity of the movable frame plate 2 along the length direction. The flexible bristles of adjacent brush rollers 3 interlock and mesh to form a continuous cleaning surface. When the workpiece impacts the cleaning surface, the movable frame plate 2 is forced to slide along the inner curved surface of the arc portion 11, forming a dynamic fan-shaped trajectory of reciprocating oscillation.

[0032] The driving component 4 includes a main gear 41 that rotates symmetrically on both sides near the hinge end of the movable frame plate 2. Arc-shaped grooves 42 are provided on both sides of the inner wall of the sorting cavity 1. An arc-shaped rack 43 is provided on one side of the inner wall of each arc-shaped groove 42. An arc-shaped gap is left between the gear surface of the arc-shaped rack 43 and the other side of the inner wall of the arc-shaped groove 42 for the main gear 41 to be inserted and mesh with the arc-shaped rack 43. The main gear 41 rotates through the arc-shaped rack 43. A secondary drive wheel 44 is symmetrically arranged on the outer wall of the main gear 41's shaft. When the movable frame plate 2 reciprocates, the secondary drive wheel 44 rotates through the rotation of the main gear 41. Each brush roller 3 has a driven wheel 45 symmetrically arranged at both ends of its shaft, meshing with the secondary drive wheel 44. The secondary drive wheel 44 and the driven wheel 45 are rotatably arranged within the cavity opened in the movable frame plate 2. Each brush roller 3 rotates through the meshing of the driven wheels 45, and the rotation directions of adjacent brush rollers 3 are opposite.

[0033] Symmetrically positioned within the sorting chamber 1 and located on both sides of the hinge end of the movable frame plate 2, the brush rollers 3 work in conjunction with the reciprocating swing of the movable frame plate 2 to drive each brush roller 3 to rotate, causing the cleaning surface to generate waveform disturbance relative to the swing tilt direction of the movable frame plate 2, thereby forming a dynamic composite friction effect.

[0034] Specifically, when the balls to be sorted fall into the sorting chamber 1 from the feed inlet, their gravitational potential energy is converted into impact kinetic energy on the cleaning surface. This impact force acts directly on the cleaning surface supported by the movable frame plate 2. Since the movable frame plate 2 is elastically hinged by a torsion spring, the impact force forces the free end of the movable frame plate 2 to slide along the inner curved surface of the arc portion 11, overcoming the torque of the torsion spring, thereby generating an initial swing displacement around the hinge point. The torsion spring then provides a restoring force, driving the movable frame plate 2 to swing back. Thus, under the alternating action of the ball impact and the elastic restoring force, the movable frame plate 2 enters a forced reciprocating swing state. This swing first generates a strong oscillation and tumbling effect on the accumulated ball group, effectively breaking up the clumps and making the balls a single layer and evenly distributed on the cleaning surface, avoiding dead corners in subsequent cleaning. This completes the initial preparation for cleaning, namely dispersion.

[0035] The main gears 41, located on both sides of the hinge end of the movable frame plate 2, swing with the movable frame plate 2. Their teeth mesh and roll on the arc-shaped rack 43, converting the fan-shaped reciprocating oscillation of the movable frame plate 2 into bidirectional rotational motion of the main gear 41 shaft. The rotation of the main gear 41 is transmitted to the driven wheels 45 at the shaft ends of each brush roller 3 through the driven wheels 44. The key design is that all adjacent driven wheels 45 directly mesh with each other, which forces the rotational motion of all brush rollers 3 driven by the same main gear 41 to be synchronized, and the rotational directions of adjacent brush rollers 3 are always opposite. When all brush rollers 3 maintain opposite synchronous rotation under drive, the interlocking flexible bristles on their surfaces form a continuous cleaning surface. At the same time, the oscillation of the movable frame plate 2 causes the overall spatial orientation tilt angle of this cleaning surface to change periodically. The reverse rotation of the cleaning surface and the periodic tilt of the overall space combine to create a complex motion field on the small ball, manifesting as a waveform disturbance. This waveform is not the physical waveform of the brush bristles, but rather the periodic and directional changes in the direction and magnitude of the resultant force acting on the small ball. In this state, the small ball is simultaneously subjected to the inertial force from the swinging of the movable frame 2, causing it to roll; the strong shear friction generated by the reverse rotation of the brush bristles strips away impurities; and the irregular rolling tendency caused by the waveform disturbance. These three mechanical forces dynamically couple to form a powerful compound friction effect, forcefully scraping and cleaning the surface of the small ball.

[0036] Because the oscillation of the movable frame plate 2 is reciprocating, the propagation direction of the wave disturbance on the clean surface caused by the aforementioned transmission chain also periodically switches between positive and negative depending on the direction of oscillation. This dynamic waveform with switchable direction, combined with the basic mode of constant, opposite rotation of adjacent brush rollers 3, makes the micro-friction vector acting on a single ball exhibit highly random, multi-directional, and non-periodic characteristics in magnitude and direction. This simulates the random multi-directional grinding principle in the polishing process, ensuring that no matter what posture the ball rests on the clean surface, every micro-area on its surface can be subjected to friction from different directions. This completely eliminates cleaning dead angles and prevents impurities from being crushed and embedded under friction in a single direction, achieving adaptive, dead-angle-free deep polishing and finishing of the micro-morphology of the ball surface.

[0037] Through this three-stage, progressive, and synergistic cleaning mechanism, the equipment efficiently removes various impurities adhering to the surface of the balls before sorting, ensuring the accuracy of the measured diameter and fundamentally solving the technical problem of reduced sorting accuracy caused by impurities.

[0038] The axes of adjacent brush rollers 3 are parallel to each other, and they extend along the roller axis to form an X-shaped cleaning groove 31.

[0039] Furthermore, such as Figure 2 and Figure 4 and Figure 5 As shown, in the upper V-shaped groove of the X-shaped cleaning groove 31, the densely packed flexible bristles on the surfaces of adjacent brush rollers 3 are not rigidly compressed in the meshing area, but rather inserted into each other at a certain depth. This makes the gap between the two brush rollers 3 not a static V-shaped groove, but an adaptive wrapping area formed by the dynamic sidewalls of the bristles, which is elastic and has a finely adjustable opening, i.e., the upper V-shaped groove. When a small ball falls into this area, its diameter will slightly expand the bristles on both sides, allowing the dynamic angle of the V-shaped groove to adaptively adjust, ensuring that the ball obtains a flexible, close-fitting three-point contact and constraint. This provides stable guidance, preventing the ball from escaping, and avoids rigid impact damage to the ball surface.

[0040] When the movable frame plate 2 oscillates back and forth under the action of the torsion spring, the spatial posture of the entire cleaning surface, along with all the V-shaped grooves on it, tilts periodically. The direction of the gravitational component of the ball constrained within the V-shaped groove changes accordingly. This forces the ball to produce a periodic lateral displacement tendency or slight jump along the groove wall within the V-shaped groove, breaking its static contact point. At this time, the actual motion state of the ball within the V-shaped groove is, at the microscopic instant, being continuously rubbed by the opposing bristles on both sides; at the macroscopic period, being periodically bumped and thrown by the overall oscillating V-shaped groove structure. The combined result of these two motion modes is that the ball, under the constraint of the V-shaped groove, undergoes irregular multi-axis micro-rotation and darting, ensuring that the composite friction effect can act uniformly and thoroughly on the entire surface of the ball at the microscopic level.

[0041] A protective cover 5 is provided at the bottom of the movable frame plate 2 along its length. The protective cover 5 is composed of multiple arc-shaped segments 51 and multiple horizontal segments 52 arranged alternately along the axial direction of the brush roller 3. The concave arc surface of each arc-shaped segment 51 covers at least one-fifth of the circumferential area of ​​the outer flexible bristle region of the corresponding brush roller 3 in the radial direction, forming a local constraint region for the corresponding brush roller 3. When the brush roller 3 rotates, the flexible bristles entering the local constraint region are touched by the concave arc surface and undergo dynamic flexural deformation. Each horizontal segment 52 and the Λ-shaped area of ​​the corresponding X-shaped cleaning groove 31 together form a triangular release space. When the dynamically flexed flexible bristles rotate into the triangular release space, they elastically recover and form high-frequency vibration.

[0042] Furthermore, such as Figure 3 and Figure 5 and Figure 6 As shown, the brush roller 3 rotates continuously under drive, with its flexible bristles serving as the direct end point for cleaning operations. When the bristles, carrying microscopic impurities adhered during the previous cleaning process, rotate to the arc-shaped segment 51, their movement path is geometrically constrained by the concave arc surface. The contact between the concave arc surface and the bristles forces the originally freely swinging bristles to undergo dynamic flexural deformation in the centripetal direction. This process essentially converts part of the kinetic energy of the bristle rotation, as well as the residual vibration energy that may be stored due to cleaning the workpiece, into elastic potential energy within the bristle fibers through mechanical interference.

[0043] The bristles, having completed their constrained deformation, then rotate into an open triangular release space formed by the horizontal section 52 and the adjacent brush roller 3. The key to this space lies in the sudden release of its geometric constraints. At the instant the constraints disappear, the elastic potential energy stored within the bristles is rapidly released, driving the bristles to rebound at high speed. Due to the three-dimensional asymmetry of the release space, this rebound is not a simple return along the original path, but evolves into a multi-degree-of-freedom, irregular, high-frequency composite vibration. At this point, the stored elastic potential energy is mainly converted into two new forms of energy: one is the high-frequency kinetic energy of the bristles themselves and the impurities they carry, and the other is the micro-airflow energy generated by the violent vibration disturbing the air. The high-frequency, violent vibration of the bristles exerts a powerful inertial force and alternating shear force on the impurities they carry. This force is sufficient to overcome the adhesion between the microscopic impurities and the bristle fibers, and effectively ejects and removes impurities that have been loosened by scraping in the arc section 51, ensuring the self-regeneration of the cleaning terminal and maintaining the optimal working condition of the bristles. The bristles, having completed self-cleaning and regained optimal elasticity, exhibit enhanced cleaning efficiency when they contact the microspheres in the next rotation cycle. Simultaneously, the high-frequency vibration characteristics acquired by the bristles from the constraint-release cycle are partially transmitted upon contact with the microspheres, adding a high-frequency, micro-amplitude impact component to the compound friction effect. This helps break down dirt adhesion, making the main cleaning process more delicate and thorough. Furthermore, the micro-airflow generated by the bristle vibration forms localized directional cyclones or turbulence within the triangular release space. This airflow effectively entrains and carries away dislodged lightweight dust from the core working area, preventing secondary contamination of the cleaned microspheres or re-adsorption, thus playing a role in auxiliary dust removal and optimizing the working environment.

[0044] An arc-shaped elastic airbag 6 is provided at the angle between the bottom of the hinge end of the movable frame plate 2 and the inner wall of the sorting chamber 1. Multiple one-way air intake ends of the elastic airbag 6 are connected to corresponding triangular release spaces, and one-way exhaust ends of the elastic airbag 6 extend to the outside of the sorting chamber 1. When the movable frame plate 2 swings back and forth, it forms a cleaning airflow on the flexible bristles that vibrate at high frequency in the triangular release space.

[0045] Furthermore, such as Figure 2 and Figure 3As shown, with each swing of the movable frame plate 2, the bottom of its hinged end periodically compresses or releases the elastic airbag 6 located at the included angle. The arc-shaped structure and elastic properties of the elastic airbag 6 allow it to efficiently adapt to changes in spatial volume during the swing; that is, during compression, the gas inside the elastic airbag 6 is pressurized; during release, a negative pressure is generated inside the elastic airbag 6. Multiple unidirectional suction ends of the elastic airbag 6 are connected to various triangular release spaces via independent air paths. As previously described, this triangular release space is the core area where the brush bristles complete the constraint-release cycle and generate high-frequency vibrations for self-cleaning; it is also the source of contamination where impurities are initially shaken off and remain in their most active suspended state. This design ensures that the suction action can act precisely and immediately on the key sites where contamination occurs. The unidirectional exhaust end of the elastic airbag 6 extends directly to the outside of the sorting chamber 1. The one-way valve structure ensures that the airflow can only flow in one direction along the path of the intake end - elastic airbag 6 - exhaust end - outside, thus establishing a closed, directional, and irreversible pollution discharge channel from the internal pollution source to the external environment. This fundamentally solves the problem of secondary dust settling or re-adsorption by turbulence that may be caused by simple mechanical shaking, making the self-cleaning of the brush roller 3 extremely thorough, reliable, and efficient, ensuring the long-lasting cleanliness and working performance of the brush bristles.

[0046] The periodic, multi-point suction action in the above technical solution creates a micro-negative pressure cleaning flow field in multiple triangular release spaces and their connected V-shaped cleaning grooves and cleaning surfaces. This flow field is not limited to the suction point, but its influence covers the entire movement path of the workpiece. This flow field can help remove the fine particles that have just been sheared off the surface of the ball by the bristles, and provide continuous airflow purging when the ball tumbles and undulates with the curved surface. It is particularly effective in removing light and sticky impurities and is a pneumatic enhancement of the composite friction effect.

[0047] Inside the sorting chamber 1, a guide plate 7 is elastically hinged at the bottom of the feed inlet. In the initial state, the guide plate 7 forms an acute angle with the clean surface, and the free end leaves a material drop gap with the top of the clean surface.

[0048] Furthermore, such as Figure 1 As shown, in the scheme without the guide plate 7, the ball falls freely from the feed inlet and directly impacts the clean curved surface below. This method easily leads to local accumulation on the curved surface and results in high impact energy. To change this initial stage, the following settings are made:

[0049] In the non-working state, the guide plate 7 forms an acute angle with the horizontal cleaning surface, and its free end maintains a controllable drop gap with the top of the surface. This geometric setting first establishes a gentle slope, forcibly changing the direction of motion of the vertically falling balls to an approximately tangential direction along the plate surface downwards. The guide plate 7 is symmetrically fitted with torsion springs at its hinge end, giving it the ability to reset and be forced to swing. For oscillation dispersion, it provides a group of balls that have been initially dispersed and whose impact energy has been moderated. The swing of the movable frame plate 2 can more effectively tumble and disperse this group of balls, avoiding cleaning dead corners caused by initial accumulation. For compound friction, it allows the balls to enter the cleaning surface with a more uniform distribution and a more suitable initial velocity, so that they can be captured by the V-shaped cleaning groove more quickly and stably and enter the compound friction state, improving the consistency of cleaning efficiency. For random polishing, the uniform distribution ensures that all balls can obtain sufficient and similar cleaning action time.

[0050] Stop plates 8 are symmetrically snapped onto the two curved extension ends of the curved section 11 on the inner side wall of the sorting chamber 1.

[0051] Furthermore, such as Figure 1 As shown, with the stop plate 8 in place, the swing energy of the movable frame plate 2 is mainly used to drive the brush roller 3 to reverse and cause waveform disturbances due to the cleaning coupling motion, and its spatial displacement is strictly constrained. Without the stop plate 8 in place, the swing angle of the movable frame plate 2 increases. Combined with the inclination of the cleaning surface itself, the small balls that have been cleaned and remain on it are actively thrown or guided to the sorting net located at the bottom of the equipment for diameter sorting under the combined action of inertia and gravity.

[0052] 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. A shot sorter for mill ball production, characterised in that, include: The sorting chamber has an inwardly convex inner wall forming an arc-shaped section. The movable frame plate is elastically hinged in the sorting cavity. The free end of the movable frame plate slides in contact with the inner curved surface of the arc portion. In the non-working state, the length direction of the movable frame plate is horizontally aligned with the arc direction of the arc portion. Several brush rollers are equidistantly arranged in the frame cavity along the length of the movable frame plate. The flexible bristles of adjacent brush rollers interlock and mesh to form a continuous cleaning surface. When the workpiece impacts the cleaning surface, the free end of the movable frame plate is forced to slide along the inner curved surface of the arc portion, forming a reciprocating swing of a dynamic fan-shaped trajectory. The driving components are symmetrically arranged in the sorting cavity and located on both sides of the hinge end of the movable frame plate. They work in conjunction with the reciprocating swing of the movable frame plate to drive each of the brush rollers to rotate, so that the cleaning surface generates waveform disturbance relative to the swing tilt direction of the movable frame plate, thereby forming a dynamic composite friction effect.

2. A shot sorter for pebble production according to claim 1, characterized in that, The axes of adjacent brush rollers are parallel to each other, and an X-shaped cleaning groove extends between them along the roller axis direction.

3. A small ball sorting machine for grinding ball production according to claim 1, characterized in that, The bottom of the movable frame plate is provided with a protective cover along its length, and the protective cover is composed of multiple arc-shaped segments and multiple horizontal segments arranged alternately along the axial direction of the brush roller.

4. A small ball sorting machine for grinding ball production according to claim 3, characterized in that, The concave arc surface of each arc segment covers at least one-fifth of the circumferential area of ​​the outer flexible bristle region in the radial direction of the corresponding brush roller, forming a local constraint region for the corresponding brush roller. When the brush roller rotates, the flexible bristles that enter the local constraint region are touched by the concave arc surface and form dynamic flexural deformation.

5. A small ball sorting machine for grinding ball production according to claim 3, characterized in that, Each horizontal segment and the corresponding Λ-shaped area of ​​the X-shaped cleaning groove together form a triangular release space. When the dynamically flexing and deforming flexible bristles rotate into the triangular release space, they elastically recover and form a high-frequency vibration.

6. A small ball sorting machine for grinding ball production according to claim 1, characterized in that, An arc-shaped elastic airbag is provided at the angle between the bottom of the hinge end of the movable frame plate and the inner sidewall of the sorting chamber. Multiple one-way air intake ends of the elastic airbag are connected to corresponding triangular release spaces, and one-way exhaust ends of the elastic airbag extend to the outside of the sorting chamber. When the movable frame plate swings back and forth, it forms a cleaning airflow on the flexible bristles that vibrate at high frequency in the triangular release space.

7. A small ball sorting machine for grinding ball production according to claim 1, characterized in that, A guide plate is elastically hinged at the bottom of the feed inlet in the sorting chamber. In the initial state, the guide plate forms an acute angle with the cleaning surface, and a material drop gap is left between the free end and the top of the cleaning surface.

8. A small ball sorting machine for grinding ball production according to claim 1, characterized in that, The inner wall of the sorting cavity is symmetrically fitted with stop plates at the two arc-shaped extension ends of the arc section.

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