A planetary wheel type steel ball strengthening grinding device

Abstract

This invention discloses a planetary gear-type steel ball strengthening grinding device, belonging to the field of grinding technology. It includes a grinding barrel, with a planetary gear train mechanism arranged at the lower end of the barrel. The planetary gear train mechanism includes a mounting plate, a gear ring mounted on the inner wall of the mounting plate, and a sun gear rotatably mounted at the inner center of the mounting plate. The sun gear meshes with several evenly distributed planetary gears, which mesh with the gear ring. Each planetary gear is driven by a grinding rod, which has a variable diameter rod structure, thicker at the bottom and thinner at the top. A helical track is installed on the inner wall of the grinding barrel, and the distance between the helical track and the grinding rod is equal. As the grinding operation proceeds, the steel ball gradually moves along the helical track towards the thinner area of ​​the grinding rod. This invention adjusts the contact position between the steel ball and different areas of coarseness in the grinding rod according to different grinding stages, achieving both high efficiency and high-quality grinding results.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, and in particular to a planetary gear type steel ball strengthening grinding device. Background Technology

[0002] As one of the most commonly used rolling elements in the bearing industry, the surface integrity of steel balls is crucial to bearing performance. During manufacturing, steel balls may contain defects such as uneven surface roughness, inconsistent dimensions, oxide scale, and other imperfections. These factors can reduce bearing reliability and service life, and even affect bearing precision and stability. To address these issues, steel balls undergo grinding. Grinding results in higher surface quality and integrity, meeting the requirements of various industrial sectors for bearing products.

[0003] Existing grinding devices generally utilize the interaction between a high-speed rotating grinding rod, a steel ball, and abrasive material to achieve grinding of the steel ball. For example, Chinese Patent No. CN114603472B discloses a planetary gear type steel ball strengthening grinding device, which includes a planetary gear train mechanism. The planetary gear train mechanism includes a sun gear, multiple planetary gears meshing with the outer periphery of the sun gear, and a gear sleeve fitted on the multiple planetary gears. The planetary gear type grinding mechanism includes multiple grinding and stirring rods, which are fixedly connected to the planetary gears respectively. Each grinding and stirring rod is provided with a grinding roller on its outer side. The existing technology does not limit the coarseness of the grinding and stirring rod. The coarse grinding rod has a larger surface area and applies greater force to the steel ball surface during collision, which can more effectively remove surface impurities and oxide scale and improve grinding efficiency. However, it may cause overheating and scratches on the steel ball surface, affecting the grinding quality. Conversely, the surface of the fine grinding rod is smoother and applies less force, which can grind the steel ball surface more finely and improve the grinding quality. Therefore, selecting a grinding rod with an appropriate coarseness is crucial to improving grinding efficiency and ensuring grinding quality. Based on this, the present invention proposes a planetary gear type steel ball strengthening grinding device. Summary of the Invention

[0004] The purpose of this invention is to provide a planetary gear type steel ball strengthening grinding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A planetary gear type steel ball strengthening grinding device includes a grinding barrel, a planetary gear train mechanism arranged at the lower end of the grinding barrel, a mounting plate, a gear ring mounted on the inner wall of the mounting plate, a sun gear rotatably mounted at the inner center of the mounting plate, the sun gear meshing with several evenly distributed planetary gears, the planetary gears meshing with the gear ring, each planetary gear drivingly connected to a grinding rod, the grinding rod having a variable diameter rod structure that is thicker at the bottom and thinner at the top, a spiral track mounted on the inner wall of the grinding barrel, and the distance between the spiral track and the grinding rod being equal, as the grinding operation proceeds, the steel ball gradually moves along the spiral track toward the finer area of ​​the grinding rod.

[0007] Preferably, a turntable is movably mounted inside the grinding barrel via bearings. A bottom support ring is provided below the turntable and is fixedly mounted on the inner wall of the grinding barrel. The upper end face of the turntable and the inner wall of the grinding barrel form a grinding chamber for accommodating steel balls and grinding auxiliary materials. The lower end of the grinding barrel is fixedly connected to the upper end of the mounting plate. A connecting shaft is mounted on the upper shaft of the planetary gear. The connecting shaft is fixedly connected to the lower end of the grinding rod via a coupling. The grinding rod moves through the turntable via bearings.

[0008] Preferably, a housing is rotatably mounted at the center of the lower end face of the turntable, and a horizontally arranged mounting shaft is rotatably mounted inside the housing. Two symmetrically arranged eccentric blocks are fixedly sleeved on the circumferential surface of the mounting shaft.

[0009] Preferably, a first bevel gear is fixedly sleeved on the circumferential surface of the mounting shaft, and a second bevel gear is engaged with the first bevel gear. The lower end of the second bevel gear is fixedly connected to the axis of the sun gear through a short shaft, and the short shaft moves through the housing.

[0010] Preferably, the spiral track includes a constant diameter spiral track base plate and a variable diameter spiral track base plate. The constant diameter spiral track base plate has a constant diameter structure, and the variable diameter spiral track base plate has a variable diameter structure with a thicker bottom and a thinner top. The lengths between the constant diameter spiral track base plate and the variable diameter spiral track base plate and the grinding rod are the same.

[0011] Preferably, a bottom shell is fitted on the outer side of the planetary gear train mechanism, and the bottom shell and the grinding barrel are connected by a spring; the spring includes an outer spring and an inner spring, the upper end of the outer spring is connected to a skirt seat, the skirt seat is fixedly connected to the outer surface of the grinding barrel, the lower end of the outer spring is connected to the bottom wall of the bottom shell, the upper end of the inner spring is connected to the lower end face of the mounting plate, and the lower end of the inner spring is connected to the bottom wall of the bottom shell.

[0012] Preferably, the inner sides of the equal-diameter spiral track base plate and the variable-diameter spiral track base plate are provided with spiral track baffles that can slide in the vertical direction, and both the equal-diameter spiral track base plate and the variable-diameter spiral track base plate are inclined downward toward the center of the grinding barrel.

[0013] Preferably, the height of the spiral track baffle gradually decreases as the spiral ascends.

[0014] Preferably, a mounting bracket is installed at the upper end of the turntable, and a receiving cavity is opened at the upper end of the mounting bracket. An electric cylinder is installed inside the receiving cavity, and a bracket is installed on the piston rod of the electric cylinder. The bracket is fixedly connected to the spiral track baffle.

[0015] Preferably, a motor is arranged below the mounting plate, the motor shaft is equipped with a belt coupling, and a short shaft is installed at the lower end of the sun gear shaft. The short shaft moves through the mounting plate and is connected to the belt coupling.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present invention achieves steel ball grinding by setting a variable diameter rod structure with a coarse bottom and a fine top to contact and collide with the steel ball. Then, by setting a spiral track and coordinating vibration, the contact position between the steel ball and the grinding rod is adjusted. In the initial stage of grinding, the steel ball contacts the coarse area of ​​the grinding rod, which quickly removes most of the impurities and oxide scale on the surface of the steel ball, thereby improving the grinding speed and efficiency. As the grinding operation proceeds, the steel ball gradually moves upward and contacts the fine area of ​​the grinding rod. The fine area of ​​the grinding rod can be used to perform more fine grinding on the surface of the steel ball, removing residual small impurities and oxide scale, improving the smoothness and uniformity of the surface, and achieving both high efficiency and high quality grinding effect.

[0018] (2) The present invention provides obstruction to the steel ball by setting a spiral track baffle. In the early stage of grinding, the obstruction effect of the spiral track baffle on the steel ball is small, so that the steel ball cannot move upward along the spiral track, ensuring that the steel ball contacts the coarse area of ​​the grinding rod to complete the initial grinding operation. As the grinding operation proceeds, the spiral track baffle gradually moves upward, increasing the obstruction effect on the steel ball and gradually increasing the contact time between the steel ball and the fine area of ​​the grinding rod. This realizes the dynamic grinding operation in which the steel ball contacts different coarse and fine areas in the grinding rod as the grinding operation progresses, further improving the grinding efficiency and grinding quality.

[0019] (3) The present invention drives the excitation mechanism to move through the sun gear and drives the grinding rod to move through the planetary gear. The sun gear and the planetary gear use a power source, which saves manufacturing costs.

[0020] (4) The present invention realizes the transmission between the motor and the sun gear through the belt coupling, avoids the vibration from being transmitted to the motor, improves the safety of the device and extends the service life of the motor. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a partial cross-sectional structural diagram of the grinding device in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the planetary gear train mechanism in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the entire grinding device proposed in the embodiments of the present invention;

[0025] Figure 4 This is a schematic diagram of the tilted steel ball state of the grinding barrel in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the assembly structure of the grinding barrel and the bottom shell in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the assembly structure of the equal-diameter spiral track base plate and the variable-diameter spiral track base plate in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the assembly structure of the motor and the sun gear in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the spiral track baffle in the initial stage of grinding in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the equal-diameter spiral track base plate in an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the excitation mechanism in an embodiment of the present invention.

[0032] In the picture: 1. Grinding barrel;

[0033] 2. Planetary gear train mechanism; 21. Mounting plate; 22. Ring gear; 23. Sun gear; 24. Planetary gears; 241. Connecting shaft; 242. Coupling;

[0034] 3. Turntable; 31. Base ring; 4. Grinding rod;

[0035] 5. Helical track; 51. Base plate of constant diameter helical track; 52. Base plate of variable diameter helical track; 53. Helical track baffle; 54. Electric cylinder; 55. Mounting bracket; 56. Receiving cavity;

[0036] 6. Vibration mechanism; 61. Housing; 62. Mounting shaft; 63. Eccentric block; 64. First bevel gear; 65. Second bevel gear;

[0037] 7. Motor; 71. Belt coupling;

[0038] 8. Bottom shell; 81. Outer spring; 811. Skirt; 812. Contouring cavity; 813. Guide post; 82. Inner spring;

[0039] 9. U-shaped mounting bracket; 10. Tilting drive motor assembly; 11. Collection box. Detailed Implementation

[0040] 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] Please see Figures 1-10This embodiment proposes a planetary gear type steel ball strengthening grinding device, including a grinding barrel 1. A planetary gear system 2 is arranged at the lower end of the grinding barrel 1. The planetary gear system 2 includes a mounting plate 21, a gear ring 22 installed on the inner wall of the mounting plate 21, and a sun gear 23 rotatably mounted at the inner center of the mounting plate 21. The sun gear 23 is meshed with several evenly distributed planetary gears 24, which are meshed with the gear ring 22. Each planetary gear 24 is driven by a grinding rod 4. In this embodiment, the grinding barrel 1 is made of wear-resistant alloy metal material. If the grinding barrel 1 itself also rotates with the grinding rod 4, the planetary gear system 2 needs to output a large torque, which can easily cause damage to the metal after long-term operation. To reduce fatigue and shorten the service life of the planetary gear train 2, a turntable 3 is movably mounted inside the grinding barrel 1 via bearings. A bottom support ring 31 is provided below the turntable 3 and is fixedly mounted on the inner wall of the grinding barrel 1. The upper end face of the turntable 3 and the inner wall of the grinding barrel 1 form a grinding chamber for accommodating steel balls and grinding materials. The lower end of the grinding barrel 1 is fixedly connected to the upper end of the mounting plate 21. A connecting shaft 241 is mounted on the upper shaft of the planetary gear 24. The connecting shaft 241 is fixedly connected to the lower end of the grinding rod 4 via a coupling 242. The grinding rod 4 moves through the turntable 3 via bearings. During the operation of the planetary gear train 2, the grinding barrel 1 remains stationary, while the turntable 3 rotates with the grinding rod 4. By driving the sun gear 23 to rotate, several sun gears 23 rotate around the sun gear 23, while the sun gear 23 rotates on its own axis, causing several grinding rods 4 to undergo a combined motion of rotation and revolution within the grinding chamber. Under the action of high-speed rotation, the grinding rods 4 collide and rub against the steel balls and grinding materials. This collision and friction produces a reaction, which leads to the removal of impurities, oxide scale, and uneven roughness on the surface of the steel balls, making them gradually smoother and more uniform.Throughout the grinding process, the coarseness of the grinding rod 4 directly affects its contact area with the steel ball. A coarser grinding rod has a larger surface area and a larger contact area with the steel ball, thus grinding more steel balls per unit time and improving grinding efficiency. A finer grinding rod has a smoother surface and less friction, allowing for more precise grinding of the steel ball surface and improving grinding quality. Therefore, to achieve both high efficiency and high-quality grinding, this invention designs the grinding rod 4 as a variable-diameter rod structure that is coarser at the bottom and thinner at the top, with the roughness decreasing towards the top. A spiral track 5 is installed on the inner wall of the grinding barrel 1. The distance between the spiral track 5 and the grinding rod 4 is equal, and this distance is slightly less than or equal to the diameter of the steel ball to be ground, ensuring that the steel ball can fully contact the grinding rod 4. In the initial stage of grinding, most of the impurities and oxide scale on the surface of the steel ball can be quickly removed through the coarse area in the grinding rod 4. As the grinding operation proceeds, the steel ball gradually moves along the spiral track 5 toward the fine area of ​​the grinding rod 4, and the surface of the steel ball is ground more finely through the fine area in the grinding rod 4, removing residual small impurities and oxide scale, improving the smoothness and uniformity of the surface, thereby meeting different needs and requirements.

[0042] Based on the above scheme, in this embodiment, the excitation mechanism 6 uses vibration to drive the steel ball to gradually move towards the finer area of ​​the grinding rod 4 along the spiral track 5. Specifically, a housing 61 is rotatably mounted at the center of the lower end face of the turntable 3. Inside the housing 61, a horizontally arranged mounting shaft 62 is rotatably mounted. Two symmetrically arranged eccentric blocks 63 are fixedly sleeved on the circumferential surface of the mounting shaft 62. The rotation of the two eccentric blocks 63 generates vibration, which in turn drives the steel ball in the grinding chamber to generate high-frequency vibration. This high-frequency vibration is transmitted to the spiral track 5, causing the steel ball to be subjected to vibration force, thereby producing an upward movement effect. In this embodiment, the spiral track 5 includes a constant-diameter spiral track base plate 51 and a variable-diameter spiral track base plate 52. The constant-diameter spiral track base plate 51 has a constant-diameter structure, while the variable-diameter spiral track base plate 52 has a variable-diameter structure that is thicker at the bottom and thinner at the top. The lengths between the constant-diameter spiral track base plate 51 and the variable-diameter spiral track base plate 52 and the grinding rod 4 are the same. In practical applications, the width of the spiral track 5 is slightly larger than the radius of the steel ball. This width limitation not only provides sufficient support for the steel ball, ensuring that it can move smoothly on the spiral track 5, but also ensures that the steel ball and the grinding rod 4 are in full contact. The number of layers in the spiral track 5 can be adjusted appropriately according to the actual production situation. On the one hand, in order to ensure that the steel ball can continuously contact the fine area of ​​the grinding rod 4, the magnitude of the vibration force of the excitation source can be controlled so that when the steel ball contacts the fine area of ​​the grinding rod 4, the upward component force and gravity are approximately the same, thereby extending the dwell time of the steel ball on the spiral track 5 and achieving the purpose of extending the continuous contact time between the steel ball and the fine area of ​​the grinding rod 4. On the other hand, through the cyclical movement of the steel ball on the spiral track 5, the steel ball continuously contacts the fine area of ​​the grinding rod 7 during the cycle, thus achieving fine grinding of the steel ball.

[0043] In this embodiment, to save manufacturing costs, the rotation of the sun gear 23 drives the eccentric block 63 to rotate. Specifically, a first bevel gear 64 is fixedly sleeved on the circumferential surface of the mounting shaft 62. The first bevel gear 64 meshes with a second bevel gear 65. The lower end of the second bevel gear 65 is fixedly connected to the axis of the sun gear 23 via a short shaft, which movably passes through the housing 61. When the sun gear 23 rotates, it drives the second bevel gear 65 to rotate via the short shaft. The second bevel gear 65 drives the first bevel gear 64, which meshes with it, to rotate. The first bevel gear 64 drives the mounting shaft 62 to rotate, and the mounting shaft 62 drives the eccentric block 63 to rotate. In this embodiment, to ensure stable rotation of the two eccentric blocks 63, the diameter of the first bevel gear 64 is larger than the diameter of the second bevel gear 65, which reduces speed and increases torque, ensuring stable rotation of the eccentric blocks 63.

[0044] On the other hand, the grinding barrel 1 is also subject to vibration. To ensure that the grinding barrel 1 can generate stable vibration, in this embodiment, a bottom shell 8 is fitted on the outer side of the planetary gear train mechanism 2. The bottom shell 8 and the grinding barrel 1 are connected by a spring. A high-strength spring is used, which absorbs the vibration energy from the vibration source and transmits it to the grinding barrel 1 by utilizing the elasticity of the spring, ensuring that the grinding barrel 1 can generate moderate vibration under vibration and maintain a stable vibration state. Specifically, the spring includes an outer spring 81 and an inner spring 82. The upper end of the outer spring 81 is connected to a skirt 811. The outer spring 81 is fixedly connected to the outer surface of the grinding barrel 1. The lower end of the outer spring 81 is connected to the bottom wall of the bottom shell 8, and the upper end of the inner spring 82 is connected to the lower end face of the mounting plate 21. The lower end of the inner spring 82 is connected to the bottom wall of the bottom shell 8. In this embodiment, in order to further limit the vibration amplitude of the grinding barrel 1, a contoured cavity 812 adapted to the shape of the outer spring 81 is provided inside the bottom shell 8. A guide post 813 is fixedly installed inside the contoured cavity 812. The outer spring 81 is sleeved on the circumferential surface of the guide post 813. Through the guiding effect of the contoured cavity 812, the swing amplitude of the grinding barrel 1 in the horizontal direction is limited.

[0045] As the grinding process proceeds, the steel balls move upwards along the spiral track 5 under vibration. However, in the initial stage of grinding, the surface of the steel balls may have a lot of oxide scale, impurities, etc. that need to be removed. Therefore, the steel balls need to stay at the bottom for a period of time to ensure that the surface of the steel balls is thoroughly cleaned and flat. After a period of time, the steel balls move upwards along the spiral track 5 and come into contact with the finer areas of the grinding rod 4 for fine grinding. For this purpose, in this invention, spiral track baffles 53 that can slide vertically are arranged on the inner side of the equal diameter spiral track base plate 51 and the variable diameter spiral track base plate 52. Both the equal diameter spiral track base plate 51 and the variable diameter spiral track base plate 52 are inclined downwards towards the center of the grinding barrel 1. Figure 8As shown, in the initial stage of grinding, the spiral track baffle 53 is located below the equal-diameter spiral track base plate 51 and the variable-diameter spiral track base plate 52, thus not obstructing the steel ball. When the steel ball moves to the equal-diameter spiral track base plate 51 or the variable-diameter spiral track base plate 52, the steel ball will move along the inclined surface of the equal-diameter spiral track base plate 51 or the variable-diameter spiral track base plate 52 under its own weight and vibration, and then detach from the equal-diameter spiral track base plate 51 and the variable-diameter spiral track base plate 52, so that the steel ball is always at the bottom of the grinding chamber and in contact with the coarse area of ​​the grinding rod 4, performing a coarse grinding operation with high grinding efficiency. As the grinding progresses, the spiral track baffle 53 gradually moves upward, obstructing the middle and lower part of the steel ball, so that the steel ball moves upward along the equal-diameter spiral track base plate 51 or the variable-diameter spiral track base plate 52 under the action of vibration, and in contact with the fine area of ​​the grinding rod 4, performing a fine grinding operation with high grinding quality. It should be noted that the spiral track baffle 53 only blocks the lower middle part of the steel ball and does not affect the contact between the steel ball and the grinding rod 4.

[0046] Based on the above scheme, in the middle and later stages of grinding, the contact probability between the steel ball and the coarse area of ​​the grinding rod 4 should be reduced, that is, the blocking effect of the lower part of the spiral track 5 on the steel ball should be increased, so that the steel ball can only move upward along the spiral track 5. Therefore, in this embodiment, the height of the spiral track baffle 53 adopts a gradual design with a higher bottom and a lower top. During the upward movement of the spiral track baffle 53, the lower the spiral track baffle 53 is, the greater the blocking effect on the steel ball, forcing the steel ball to move upward and increasing the contact probability between the steel ball and the fine area of ​​the grinding rod 4.

[0047] In this embodiment, an electric cylinder 54 drives the spiral track baffle 53 to move vertically. Specifically, a mounting frame 55 is installed on the upper end of the turntable 3, and a receiving cavity 56 is opened on the upper end of the mounting frame 55. The electric cylinder 54 is installed inside the receiving cavity 56, and a bracket is installed on the piston rod of the electric cylinder 54. The bracket is fixedly connected to the spiral track baffle 53. It should be noted that during the installation process, the mounting frame 55 is completely offset from the grinding rod 4 to avoid collision between the rotating grinding rod 4 and the mounting frame 55. In addition, the mounting frame 55 adopts a frustum structure with a thicker bottom and a thinner top. After the steel ball and grinding auxiliary material are introduced into the grinding chamber, the inclined arc surface on the outer side of the mounting frame 55 guides the steel ball to the outside of the grinding chamber, increasing the probability of contact with the grinding rod 4.

[0048] To achieve the rotation of the sun gear 23, the present invention uses a motor 7 to drive the sun gear 23 to rotate. However, the mounting plate 21 is subject to vibration. To prevent the vibration from being transmitted to the motor 7 and causing damage, a flexible connection is used to reduce the vibration experienced by the motor 7. Specifically, the motor 7 is installed inside the bottom shell 8, and a belt coupling 71 is installed on the motor shaft of the motor 7. A short shaft is installed at the lower end of the shaft of the sun gear 23, which movably passes through the mounting plate 21 and is connected to the belt coupling 71. The flexible transmission through the belt coupling 71 enables the mounting plate 21 to rotate at high speed, and greatly reduces the probability of the motor 7 being subjected to vibration.

[0049] After the steel balls are ground, they are tilted out of the grinding chamber by flipping the grinding barrel 1. Specifically, the bottom shell 8 is rotatably mounted inside the U-shaped mounting bracket 9 via a short shaft. One of the short shafts is connected to the tilting drive motor assembly 10. In this embodiment, the tilting drive motor assembly 10 includes a servo motor. The motor shaft of the servo motor is fixedly fitted with a small pulley. One of the short shafts extends to the outside of the U-shaped mounting bracket 9 and is fixedly fitted with a large pulley. The large pulley is connected to the small pulley via a V-belt. In order to limit the tilting angle of the grinding barrel 1, a limit rod is also fixedly installed on the outer surface of the bottom shell 8. A limit arc groove is opened in the U-shaped mounting bracket 9 at the position corresponding to the limit rod. The limit rod is slidably assembled in the limit arc groove, and the tilting angle of the grinding barrel 1 is limited by the limit arc groove.

[0050] Based on the above scheme, a collection box 11 is arranged on the U-shaped mounting frame 9 corresponding to the flipping direction of the grinding barrel 1, and the steel balls after grinding are collected through the collection box 11.

[0051] In the description of this invention, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of embodiments of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0053] Although embodiments of the invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A planetary gear type steel ball strengthening grinding device, comprising a grinding barrel (1), a planetary gear train mechanism (2) arranged at the lower end of the grinding barrel (1), the planetary gear train mechanism (2) comprising a mounting plate (21), a gear ring (22) mounted on the inner wall of the mounting plate (21), a sun gear (23) rotatably mounted on the inner center of the mounting plate (21), the sun gear (23) meshing with several evenly distributed planetary gears (24), the planetary gears (24) meshing with the gear ring (22), and each planetary gear (24) being drivenly connected to a grinding rod (4), characterized in that: The grinding rod (4) has a variable diameter rod structure that is thicker at the bottom and thinner at the top. The inner wall of the grinding barrel (1) is equipped with a spiral track (5), and the distance between the spiral track (5) and the grinding rod (4) is equal. As the grinding operation proceeds, the steel ball moves gradually along the spiral track (5) toward the fine area of ​​the grinding rod (4). Inside the grinding barrel (1), a turntable (3) is movably mounted via a bearing. A bottom support ring (31) is provided below the turntable (3). The bottom support ring (31) is fixedly mounted on the inner wall of the grinding barrel (1). The upper end face of the turntable (3) and the inner wall of the grinding barrel (1) form a grinding chamber for accommodating steel balls and grinding auxiliary materials. The lower end of the grinding barrel (1) is fixedly connected to the upper end of the mounting plate (21). A connecting shaft (241) is mounted on the upper shaft of the planetary gear (24). The connecting shaft (241) is fixedly connected to the lower end of the grinding rod (4) via a coupling (242). The grinding rod (4) moves through the turntable (3) via a bearing. The spiral track (5) includes a constant diameter spiral track base plate (51) and a variable diameter spiral track base plate (52). The constant diameter spiral track base plate (51) has a constant diameter structure, and the variable diameter spiral track base plate (52) has a variable diameter structure with a thicker bottom and a thinner top. The lengths of the constant diameter spiral track base plate (51) and the variable diameter spiral track base plate (52) from the grinding rod (4) are the same. The inner sides of the equal diameter spiral track base plate (51) and the variable diameter spiral track base plate (52) are provided with spiral track baffles (53) that can slide in the vertical direction. Both the equal diameter spiral track base plate (51) and the variable diameter spiral track base plate (52) are inclined downward towards the center of the grinding barrel (1).

2. The planetary gear type steel ball strengthening grinding device according to claim 1, characterized in that: A housing (61) is rotatably mounted on the center of the lower end face of the turntable (3). A horizontally arranged mounting shaft (62) is rotatably mounted inside the housing (61). Two symmetrically arranged eccentric blocks (63) are fixedly sleeved on the circumferential surface of the mounting shaft (62).

3. The planetary gear type steel ball strengthening grinding device according to claim 2, characterized in that: The circumferential surface of the mounting shaft (62) is fixedly fitted with a first bevel tooth (64), and the first bevel tooth (64) is meshed with a second bevel tooth (65). The lower end of the second bevel tooth (65) is fixedly connected to the axis of the sun gear (23) through a short shaft, and the short shaft moves through the housing (61).

4. The planetary gear type steel ball strengthening grinding device according to claim 1, characterized in that: The planetary gear train mechanism (2) is fitted with a bottom shell (8) on its outer side. The bottom shell (8) and the grinding barrel (1) are connected by a spring. The spring includes an outer spring (81) and an inner spring (82). The upper end of the outer spring (81) is connected to a skirt seat (811). The skirt seat (811) is fixedly connected to the outer surface of the grinding barrel (1). The lower end of the outer spring (81) is connected to the bottom wall of the bottom shell (8). The upper end of the inner spring (82) is connected to the lower end face of the mounting plate (21). The lower end of the inner spring (82) is connected to the bottom wall of the bottom shell (8).

5. The planetary gear type steel ball strengthening grinding device according to claim 1, characterized in that: The height of the spiral track baffle (53) gradually decreases as the spiral moves upward.

6. The planetary gear type steel ball strengthening grinding device according to claim 5, characterized in that: A mounting bracket (55) is installed on the upper end of the turntable (3). A receiving cavity (56) is opened on the upper end of the mounting bracket (55). An electric cylinder (54) is installed inside the receiving cavity (56). A bracket is installed on the piston rod of the electric cylinder (54). The bracket is fixedly connected to the spiral track baffle (53).

7. The planetary gear type steel ball strengthening grinding device according to claim 1, characterized in that: A motor (7) is arranged below the mounting plate (21). A belt coupling (71) is installed on the motor shaft of the motor (7). A short shaft is installed on the lower end of the sun gear (23). The short shaft moves through the mounting plate (21) and is connected to the belt coupling (71).

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