Rock grinding device

Abstract

The utility model discloses a rock grinding device which comprises a box body, a smashing device, a grinding assembly, a first-stage sieve, a second-stage sieve and a planetary grinding device, the smashing device, the first-stage sieve, the grinding assembly, the second-stage sieve and the planetary grinding device are sequentially arranged in the box body from top to bottom, and the smashing device is used for smashing rocks. The grinding assembly is used for grinding crushed rock into rock powder, the first-stage sieve is detachably connected with the box body, the second-stage sieve is slidably connected with the box body, and the planetary grinding device is used for carrying out secondary grinding on the rock powder. The device has the technical effects that mined rocks can be ground into experimental-level rock powder at a time, and the efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of grinding device technology, specifically to a rock grinding device. Background Technology

[0002] Existing grinding equipment has a relatively simple structure and limited function, lacking the ability to crush rocks. When the sampled rock blocks are large, it affects the grinding quality of the equipment, resulting in unsatisfactory grinding effects and requiring more time for grinding, thus reducing work efficiency. In addition, most existing grinding and pulverizing machines can only perform grinding and pulverizing, and cannot simultaneously screen incompletely crushed sample blocks. Furthermore, the powder produced by existing rock grinding devices is of industrial grade and cannot be directly used for experimental analysis. If experimental analysis is required, the ground powder must be added to a planetary grinder for further grinding. Utility Model Content

[0003] Therefore, this utility model provides a rock grinding device to solve the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] According to a first aspect of the present invention, it includes a housing, a crushing device, a grinding assembly, a primary sieve, a secondary sieve, and a planetary grinding device. The crushing device, the primary sieve, the grinding assembly, the secondary sieve, and the planetary grinding device are arranged sequentially from top to bottom inside the housing. The crushing device is used for crushing rocks, the grinding assembly is used for grinding the crushed rocks into rock powder, the primary sieve is detachably connected to the housing, the secondary sieve is slidably connected to the housing, and the planetary grinding device is used for secondary grinding of the rock powder.

[0006] Furthermore, it also includes a collection box, with a side opening on the side wall of the box body, and the collection box is disposed on the side wall of the box body and located at the side opening.

[0007] Furthermore, the primary screen is inclined and positioned inside the box.

[0008] Furthermore, the crushing device includes a first motor, a first mounting shaft, a second mounting shaft, a first gear, a second gear, a first crushing roller, and a second crushing roller. The first motor is installed inside the housing, and the first mounting shaft is connected to the output shaft of the first motor. The first gear and the first crushing roller are sequentially mounted on the first mounting shaft from right to left. The second mounting shaft is rotatably installed inside the housing, and the second gear and the second crushing roller are sequentially mounted on the second mounting shaft from right to left. The first gear and the second gear mesh with each other, and the first crushing roller and the second crushing roller cooperate with each other.

[0009] Furthermore, it also includes a partition and a first support plate. The housing is equipped with a partition and a first support plate, and the first motor is mounted on the first support plate.

[0010] The crushing device also includes a first output shaft and a second output shaft. The first output shaft is installed at both ends of the first mounting shaft, and the second output shaft is installed at both ends of the second mounting shaft. One of the first output shafts and one of the second output shafts are rotatably connected to the side wall of the housing. The other first output shaft passes through the partition and is connected to the output shaft of the first motor. The other second output shaft is rotatably connected to the partition.

[0011] Furthermore, the grinding assembly includes a grinding roller, a grinding plate, a support assembly, and a second motor. The second motor is installed inside the housing, the grinding roller is connected to the output shaft of the second motor, the grinding plate is connected to the inner sidewall of the housing through the support assembly, and the bottom of the grinding roller extends into the grinding plate.

[0012] Furthermore, the bottom of the grinding plate has holes for passing through the powder.

[0013] Furthermore, the support assembly includes a first support plate and a second support plate. One end of the first support plate is connected to the grinding plate, and the other end of the first support plate is connected to the inner wall of the housing. The second support plate is located below the first support plate, with one end of the second support plate connected to the grinding plate and the other end of the second support plate connected to the inner wall of the housing.

[0014] Furthermore, a second support plate is also provided inside the box, and the second motor is mounted on the second support plate.

[0015] Furthermore, the primary sieve has multiple sieve holes.

[0016] This invention has the following advantages: The crushing device ensures thorough crushing of the rock, which, after passing through a primary sieve, falls onto the grinding assembly. The grinding assembly further grinds the crushed rock into powder, which is then discharged through a powder outlet after passing through a secondary sieve. This effectively ensures the degree of crushing of the discharged powder while simultaneously achieving two-stage screening of incompletely crushed rock, ensuring that all discharged powder is the required powder, thus guaranteeing work efficiency. The slidable connection between the secondary sieve and the housing ensures that powder not fully ground by the grinding assembly can be further ground after passing through the secondary sieve, further ensuring the grinding effect. The planetary grinding device allows for a second grinding of the rock powder discharged through the secondary sieve, ensuring that the device can meet the powder size requirements for experimental analysis. This device enables the grinding of rock into experimental-grade rock powder in a single pass, improving efficiency. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 A perspective view of a rock grinding device provided for some embodiments of this utility model.

[0020] Figure 2 A perspective view of a rock grinding device without a housing, provided for some embodiments of this utility model.

[0021] Figure 3 This is a perspective view of a planetary grinding device for a rock grinding apparatus provided in some embodiments of the present invention.

[0022] Figure 4 This is a first cross-sectional view of a rock grinding device without a housing and a planetary grinding device, provided for some embodiments of the present invention.

[0023] Figure 5 This is a second cross-sectional view of a rock grinding device without a housing and a planetary grinding device, provided for some embodiments of the present invention.

[0024] Figure 6 This is a perspective view of a rock grinding device without a housing and a planetary grinding device, provided for some embodiments of the present invention.

[0025] Figure 7 A first view of a planetary grinding apparatus for a rock grinding device provided in some embodiments of this utility model.

[0026] Figure 8 A second view of a planetary grinding apparatus for a rock grinding device provided in some embodiments of this utility model.

[0027] Figure 9 A perspective view of a collection box for a rock grinding device provided in some embodiments of this utility model.

[0028] Figure 10 A perspective view of the powder-passing box of a rock grinding device provided for some embodiments of this utility model.

[0029] In the diagram: 1. Box body; 11. Side opening; 12. Support leg; 13. First support plate; 14. Second support plate; 15. Partition; 16. Placement plate; 17. Powder outlet; 2. Secondary sieve; 21. Screen mesh; 22. Handle; 23. Sieve frame; 3. Collection box; 31. Box body; 32. Guide connecting plate; 33. Transition snap-fit ​​plate; 4. Primary sieve; 41. Sieve hole; 51. Grinding roller; 52. Grinding plate; 53. First support plate; 54. Second support plate; 55. Second motor; 56. Powder passage hole; 57. First grinding bead; 58. Second grinding bead; 59. Third output shaft; 61. First mounting shaft; 62. 63. First crushing roller, 64. Second mounting shaft, 65. Second crushing roller, 66. First motor, 67. First output shaft, 68. First gear, 69. Second output shaft, 7. Powder conveying shell, 71. Powder conveying pipe, 72. Inclined surface, 73. Powder conveying port, 84. Planetary grinding device, 85. Base plate, 86. Support rod, 87. Disc, 88. Grinding jar, 89. Grinding cover, 80. Ball cover, 81. Powder inlet pipe, 81. Planetary transmission assembly, 82. Planetary motor, 83. Sun gear, 84. Planetary gear, 85. First wheel shaft, 86. Grinding gear, 87. Second wheel shaft. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] like Figures 1 to 10 As shown, a rock grinding device according to the first aspect of this utility model includes a housing 1, a crushing device, a grinding component, a primary sieve 4, a secondary sieve 2, and a planetary grinding device 8. The crushing device, the primary sieve 4, the grinding component, the secondary sieve 2, and the planetary grinding device 8 are arranged sequentially from top to bottom inside the housing 1. The crushing device is used for crushing rocks, the grinding component is used for grinding the crushed rocks into rock powder, the primary sieve 4 is detachably connected to the housing 1, the secondary sieve 2 is slidably connected to the housing 1, and the planetary grinding device 8 is used for secondary grinding of the rock powder.

[0032] In the above embodiments, it should be noted that the primary sieve 4 has multiple sieve holes 41, which are arranged in a rectangular array on the primary sieve 4. The secondary sieve 2 includes a sieve mesh 21, a sieve frame 23, and a handle 22. The sieve mesh 21 is arranged inside the sieve frame 23. The sieve frame 23 is slidably connected to the inner side wall of the box body 1. The handle 22 is arranged on the outer side wall of the sieve frame 23. The bottom of the box body 1 has a powder outlet 16.

[0033] Furthermore, it also includes support legs 12. Multiple support legs 12 are provided at the bottom of the box body 1. The support legs 12 are connected to the box body 1 by means of bolt connection or welding connection, etc.; a placement plate 16 is provided between the multiple support legs 12.

[0034] In addition, it also includes a powder-passing shell 7 and a powder-passing pipe 71. The powder-passing shell 7 is installed inside the housing 1 and is located below the secondary sieve 2. The inner side wall of the powder-passing shell 7 is provided with multiple inclined surfaces 72. The bottom wall of the powder-passing shell 7 is provided with a powder-passing port 73, which is located at the center of the multiple inclined surfaces 72. The powder-passing pipe 71 is inserted into the powder-passing port 73.

[0035] The planetary grinding device 8 includes a first base plate 81, support rods 82, a disc 83, a grinding jar 84, a grinding cover 85, a ball cover 86, a powder inlet pipe 87, and a planetary transmission assembly 88. The first base plate 81 is mounted on a placement plate 16. Multiple support rods 82 are mounted on the side of the first base plate 81 facing away from the placement plate 16. A disc 83 is positioned at the end of each support rod 82 facing away from the first base plate 81. All support rods 82 are installed between the disc 83 and the first base plate 81. The planetary transmission assembly 88 is installed between the first base plate 81 and the disc 83. Multiple grinding jars 84 are present, and each grinding jar 84 has a grinding cover 85 at its bottom. The second wheel shaft 89 passes through the disk 81 and is connected to the planetary transmission assembly 88. The second wheel shaft 89 is rotatably connected to the disk 81 through bearings. Each grinding jar 84 is covered with a grinding cover 85. The grinding cover 85 has a shaft hole in the center. One end of the powder inlet pipe 87 is connected to the powder passage pipe 71 and the powder inlet pipe 87 and the powder passage pipe 71 are interconnected. The other end of the powder inlet pipe 87 is inserted into the shaft hole of the grinding cover 85. The grinding cover 85 is rotatably connected to the powder inlet pipe 87 through bearings. The grinding cover 85 has a ball hole. A ball hole cover 86 is placed on the ball hole on the grinding cover 85.

[0036] The planetary transmission assembly 88 includes a planetary motor 881, a sun gear 882, planetary gears 883, a first wheel shaft 884, and a grinding gear 885. The planetary motor 881 is mounted on a first base plate 81. The output shaft of the planetary motor 881 is rotatably connected to the disk 83 via a bearing. The sun gear 882 is sleeved on the output shaft of the planetary motor 881. The first wheel shaft 884 is located on the side of the disk 83 facing away from the grinding jar 84. The planetary gear 883 is sleeved on the first wheel shaft 884 and is rotatable relative to the first wheel shaft 884. The grinding gear 885 is sleeved on a second wheel shaft 89 and is fixed to the second wheel shaft 89 by a key. The planetary gear 883 meshes with the sun gear 882, and the grinding gear 885 meshes with the planetary gear 883.

[0037] The working principle of the planetary grinding device 8 is as follows: after the rock powder is screened by the secondary sieve 2, it falls into the powder shell 7, then flows through the powder pipe 71 and the powder inlet pipe 87 into the grinding jar 84. Then, the ball inlet cover 86 is opened, and the grinding balls are put into the grinding jar 84 through the ball inlet hole. After the ball cover 86 is closed, the planetary motor 881 is turned on, which drives the sun gear 882 to rotate, drives the planetary gear 883 to rotate, drives the grinding gear 885 to rotate, and drives the grinding jar 84 to rotate to start further grinding of the rock powder screened by the secondary sieve 2 to achieve the rock powder size requirements required for experimental analysis.

[0038] The technical effects achieved by the above embodiments are as follows: the crushing device enables the rock to be fully crushed, and after being screened by the primary sieve 4, it falls onto the grinding assembly. The grinding assembly further grinds the crushed rock into powder, and then the powder after being screened by the secondary sieve 2 is discharged through the powder outlet 16. This effectively ensures the degree of crushing of the discharged powder while achieving two-stage screening of the rock that is not completely crushed, ensuring that all the discharged powder is the required powder, thereby ensuring work efficiency. The slidable connection between the secondary sieve 2 and the housing 1 ensures that the powder that is not completely ground by the grinding assembly is further ground after being screened by the secondary sieve 2, thus ensuring the grinding effect. The planetary grinding device 8 enables the rock powder discharged by the secondary sieve 2 to be ground again to ensure that the device can meet the powder size requirements for experimental analysis. This device enables the mining rock to be ground into experimental-grade rock powder in one go, improving efficiency.

[0039] Optional, such as Figures 1 to 10 As shown, in some embodiments, a collection box 3 is also included. A side opening 11 is provided on the side wall of the box body 1. The collection box 3 is disposed on the side wall of the box body 1 and located at the side opening 11. The primary screen 4 is inclinedly disposed inside the box body 1.

[0040] In the above optional embodiments, it should be noted that the angle between the lower surface of the primary sieve 4 and the inner wall of the connecting box 1 is between 30 degrees and 60 degrees. Preferably, the tilt angle is 15 degrees, 30 degrees, 45 degrees or 60 degrees. The higher side of the primary sieve 4 is connected to the inner wall of the box 1 by bolts or snap-fit, and the lower side of the primary sieve 4 is connected to the lower surface of the side opening 11 by bolts or snap-fit. The collection box 3 is snap-fitted to the bottom wall of the side opening 11.

[0041] The collection box 3 includes a box body 31, a guide connecting plate 32, and a transition snap plate 33. The box body 31 is connected to the transition snap plate 33 through the guide connecting plate 32. The transition snap plate 33 is connected to the inner side wall of the box body 1. The guide connecting plate 32 overlaps on the bottom wall of the side opening 1. The box body 31 abuts against the outer side wall of the box body 1. The guide connecting plate 32 is inclined relative to the bottom wall of the side opening 1 at an angle between 15 and 60 degrees. Preferably, the inclination angle is 15 degrees, 30 degrees, 45 degrees, or 60 degrees. The upper surface of the guide connecting plate 32 smoothly transitions to the upper surface of the primary sieve 4.

[0042] The advantages of the above optional embodiments are as follows: the inclined arrangement of the primary screen 4 inside the box 1 and the cooperation with the collection box 3 ensures that the uncrushed rocks are screened out and fall into the collection box 3 for secondary crushing, thus ensuring the crushing effect of the rocks; the inclined arrangement between the bottom walls of the opposite side opening 1 of the guide connecting plate 32 and the upper surface of the guide connecting plate 32 and the upper surface of the primary screen 4 further ensures the efficiency of the uncrushed rocks falling into the box 31.

[0043] Optional, such as Figures 1 to 10 As shown, in some embodiments, the crushing device includes a first motor 65, a first mounting shaft 61, a second mounting shaft 63, a first gear 67, a second gear 68, a first crushing roller 62, and a second crushing roller 64. The first motor 65 is installed inside the housing 1. The first mounting shaft 61 is connected to the output shaft of the first motor 65. The first gear 67 and the first crushing roller 62 are sequentially mounted on the first mounting shaft 61 from right to left. The second mounting shaft 63 is rotatably installed inside the housing 1. The second gear 68 and the second crushing roller 64 are sequentially mounted on the second mounting shaft 63 from right to left. The first gear 67 and the second gear 68 mesh with each other, and the first crushing roller 62 and the second crushing roller 64 cooperate with each other.

[0044] It also includes a partition 15 and a first support plate 13. The housing 1 is provided with a partition 15 and a first support plate 13, and the first motor 65 is installed on the first support plate 13.

[0045] The crushing device also includes a first output shaft 66 and a second output shaft 69. The first output shaft 66 is installed at both ends of the first mounting shaft 61, and the second output shaft 69 is installed at both ends of the second mounting shaft 63. One of the first output shafts 66 and one of the second output shafts 69 are rotatably connected to the side wall of the housing 1. The other first output shaft 66 passes through the partition 15 and is connected to the output shaft of the first motor 65. The other second output shaft 69 is rotatably connected to the partition 15.

[0046] In the above optional embodiments, it should be noted that the first output shaft 66 is integrally formed or welded to the first mounting shaft 61, the second output shaft 69 is integrally formed or welded to the second mounting shaft 63, and the first motor 65 is connected to the first support plate 13 by bolt connection or snap-fit ​​connection, etc.

[0047] The working principle of the crushing device is as follows: the first motor 65 drives the first output shaft 66 to rotate, which in turn drives the first mounting shaft 61 to rotate, which in turn drives the first gear 67 to work and simultaneously drives the first crushing roller 62 to work. The first gear 67 drives the second gear 68 to work, and the second gear 68 drives the second mounting shaft 63 to rotate, which in turn drives the second crushing roller 64 to work. The crushing of rocks is achieved through the coordinated work of the first crushing roller 62 and the second crushing roller 64.

[0048] The advantages of the above optional embodiments are: the rock is crushed through the cooperation of the first gear 67 and the second gear 68, and the cooperation of the first crushing roller 62 and the second crushing roller 64 ensures the effectiveness of the cooperation.

[0049] Optional, such as Figures 1 to 10 As shown, in some embodiments, the grinding assembly includes a grinding roller 51, a grinding plate 52, a support assembly, and a second motor 55. The second motor 55 is installed inside the housing 1. The grinding roller 51 is connected to the output shaft of the second motor 55. The grinding plate 52 is connected to the inner sidewall of the housing 1 through the support assembly. The bottom of the grinding roller 51 extends into the grinding plate 52. The bottom of the grinding plate 52 has a powder-passing hole 56.

[0050] The support assembly includes a first support plate 53 and a second support plate 54. One end of the first support plate 53 is connected to the grinding plate 52, and the other end of the first support plate 53 is connected to the inner wall of the housing 1. The second support plate is located below the first support plate 53. One end of the second support plate 54 is connected to the grinding plate 52, and the other end of the second support plate is connected to the inner wall of the housing 1.

[0051] The housing 1 is also equipped with a second support plate 14, and the second motor 55 is mounted on the second support plate 14.

[0052] In the above optional embodiments, it should be noted that the grinding plate 52 is an arc-shaped plate, the size of the sieve opening 41 is larger than the size of the powder passage 56 and larger than the size of the mesh opening of the sieve 21, the first support plate 13 and the second support plate 14 are parallel to each other, the partition plate 14 is perpendicular to the first support plate 13, the first support plate 53 and the second support plate 54 are both welded to the grinding plate 52 or connected by bolts or other means, and the first support plate 53 and the second support plate 54 are both welded to the inner sidewall of the box 1 or connected by bolts or other means.

[0053] The grinding assembly also includes a first grinding ball 57, a second grinding ball 58, and a third output shaft 59. Each end of the grinding roller 51 is provided with a third output shaft 59. One of the third output shafts 59 is rotatably connected to the housing 1, and the other third output shaft 59 passes through the partition 15 and is connected to the second motor 55. The second motor 55 is connected to the second support plate 54 by bolts or snap-fit. Multiple first grinding balls 57 are fixedly installed at equal intervals on the outer wall of the grinding roller 16, and multiple second grinding balls 58 are fixedly installed at equal intervals on the inner wall of the grinding plate 52. By using the grinding roller 51 and the grinding plate 52 in cooperation, and by using multiple first grinding balls 57 and multiple second grinding balls 58, the crushed rock particles can be ground quickly and effectively.

[0054] The advantages of the above optional embodiments are as follows: the setting of the first support plate 53 and the second support plate 54 realizes the reinforcement and support of the grinding plate 52, making the installation position of the grinding plate 52 more secure; the setting of the size of the sieve 41 being larger than the size of the powder passage 56 being larger than the size of the mesh of the sieve 21 enables the crushed rock to achieve three-stage screening, ensuring the effect of rock grinding into powder.

[0055] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0056] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A rock grinding device, characterized in that, The device includes a housing (1), a crushing device, a grinding assembly, a primary sieve (4), a secondary sieve (2), and a planetary grinding device (8). The housing (1) is arranged from top to bottom with the crushing device, the primary sieve (4), the grinding assembly, the secondary sieve (2), and the planetary grinding device (8). The crushing device is used for crushing rocks, the grinding assembly is used for grinding crushed rocks into rock powder, the primary sieve (4) is detachably connected to the housing (1), the secondary sieve (2) is slidably connected to the housing (1), and the planetary grinding device (8) is used for secondary grinding of the rock powder.

2. The rock grinding device according to claim 1, characterized in that, It also includes a collection box (3), and the side wall of the box body (1) is provided with a side opening (11). The collection box (3) is disposed on the side wall of the box body (1) and located at the side opening (11).

3. The rock grinding device according to claim 2, characterized in that, The primary screen (4) is inclinedly arranged inside the box (1).

4. A rock grinding device according to claim 1, characterized in that, The crushing device includes a first motor (65), a first mounting shaft (61), a second mounting shaft (63), a first gear (67), a second gear (68), a first crushing roller (62), and a second crushing roller (64). The first motor (65) is installed inside the housing (1). The first mounting shaft (61) is connected to the output shaft of the first motor (65). The first gear (67) and the first crushing roller (62) are sequentially mounted on the first mounting shaft (61) from right to left. The second mounting shaft (63) is rotatably installed inside the housing (1). The second gear (68) and the second crushing roller (64) are sequentially mounted on the second mounting shaft (63) from right to left. The first gear (67) and the second gear (68) mesh with each other, and the first crushing roller (62) and the second crushing roller (64) cooperate with each other.

5. A rock grinding device according to claim 4, characterized in that, It also includes a partition (15) and a first support plate (13), the partition (15) and the first support plate (13) are provided inside the housing (1), and the first motor (65) is mounted on the first support plate (13); The crushing device further includes a first output shaft (66) and a second output shaft (69). The first output shaft (66) is installed at both ends of the first mounting shaft (61), and the second output shaft (69) is installed at both ends of the second mounting shaft (63). One of the first output shafts (66) and one of the second output shafts (69) are rotatably connected to the side wall of the housing (1). Another first output shaft (66) passes through the partition (15) and is connected to the output shaft of the first motor (65). Another second output shaft (69) is rotatably connected to the partition (15).

6. A rock grinding device according to claim 1, characterized in that, The grinding assembly includes a grinding roller (51), a grinding plate (52), a support assembly, and a second motor (55). The second motor (55) is installed inside the housing (1). The grinding roller (51) is connected to the output shaft of the second motor (55). The grinding plate (52) is connected to the inner wall of the housing (1) through the support assembly. The bottom of the grinding roller (51) extends into the grinding plate (52).

7. A rock grinding device according to claim 6, characterized in that, The bottom of the grinding plate (52) has a powder hole (56).

8. A rock grinding device according to claim 7, characterized in that, The support assembly includes a first support plate (53) and a second support plate (54). One end of the first support plate (53) is connected to the grinding plate (52), and the other end of the first support plate (53) is connected to the inner wall of the housing (1). The second support plate (54) is located below the first support plate (53). One end of the second support plate (54) is connected to the grinding plate (52), and the other end of the second support plate (54) is connected to the inner wall of the housing (1).

9. A rock grinding device according to claim 8, characterized in that, The housing (1) is also provided with a second support plate (14), and the second motor (55) is mounted on the second support plate (14).

10. A rock grinding device according to claim 3, characterized in that, The primary sieve (4) has multiple sieve holes (41).

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