Aggregate grinding device for building concrete

Abstract

The present invention discloses an aggregate grinding device for building concrete, which relates to the technical field of concrete grinding, and comprises a workbench, wherein a fixed cover is fixedly connected to the side of the upper surface of the workbench, and a discharge port is also provided on the side of the center position of the upper surface of the workbench, and auxiliary plates are fixedly connected to the front and rear sides of the upper surface of the workbench, a grinding groove is provided on the upper surface of the fixed cover, and a limiting groove is also provided on the upper surface of the fixed cover, and the limiting plate is nested and connected inside the limiting groove. The aggregate grinding device for building concrete can drive the grinding mechanism, the auxiliary grinding mechanism and the regulating mechanism to operate synchronously through an energy-saving motor body, and by selecting an electric motor of appropriate capacity, it is ensured that the energy-saving motor body operates in a high efficiency range, which can reduce power loss and save electric energy, and the frequency converter performs speed control, which can realize precise control of the energy-saving motor body and reduce energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of concrete grinding, in particular to an aggregate grinding device for building concrete. Background Art

[0002] Architectural concrete is a composite material widely used in various construction projects. It has good mechanical properties and durability and is one of the indispensable important materials for modern construction.

[0003] Aggregate grinding for concrete is an important technology, which is mainly used to improve the performance of aggregate to meet the requirements of high-strength concrete. Through grinding, impurities and irregular parts on the surface of aggregate can be removed to make its particles more uniform and smooth, thereby improving the quality of aggregate.

[0004] Although the existing concrete aggregate grinding device can automatically grind the aggregate, most of the devices are driven by multiple motors during use. The motors consume a lot of energy when in use, which is not energy-saving enough. The motor body is not stable enough in the high-efficiency range and has a large power. At the same time, when grinding the aggregate, most of the devices can only perform a single grinding operation, which leads to insufficient grinding of the aggregate and cannot meet the strict requirements of high-strength concrete on the aggregate particle size and shape. For example, some devices have uneven distribution of aggregate particle size after grinding, which affects the strength and durability of the concrete. In addition, during the grinding process, the crushing and grinding efficiency of the aggregate is low, and the aggregate cannot be ground to the required fineness in a short time, which affects the construction progress. At the same time, the existing grinding device cannot dump the ground aggregate by itself after grinding. It is necessary to manually open the cover plate and manually dump the ground aggregate into the collection container, which increases the labor intensity and operation time.

[0005] Therefore, we propose an aggregate grinding device for building concrete to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide an aggregate grinding device for building concrete, so as to solve the problem raised by the above background technology that most of the equipment on the market currently uses multiple motors to drive its operation, and the motors consume a lot of energy when in use, which is not energy-saving.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: an aggregate grinding device for building concrete, comprising a workbench, a fixed cover is fixedly connected to the side of the upper surface of the workbench, a fixed plate is fixedly connected at the center of the upper surface of the workbench, a discharge port is also opened at the side of the center of the upper surface of the workbench, and auxiliary plates are fixedly connected to the front and rear sides of the upper surface of the workbench;

[0008] A grinding groove, wherein the grinding groove is provided on the upper surface of the fixed cover, and a limiting groove is also provided on the upper surface of the fixed cover, and a limiting plate is nested and connected inside the limiting groove, a connecting plate is fixedly connected to the upper surface of the limiting plate, and a grinding mechanism for grinding concrete placed in the grinding groove is provided between the connecting plate and the fixed cover;

[0009] A grinding box, wherein the grinding box is arranged between the two sets of fixed plates, and a slide groove is provided on the inner side of the fixed plate, and the outer side of the grinding box is nested and connected inside the slide groove, and a rotating shaft is nested and connected inside the auxiliary plate, and an auxiliary grinding mechanism for further grinding concrete is provided between the rotating shaft and the inner side of the grinding box;

[0010] A linkage shaft is nested and connected to the upper surface of the workbench, and the inner end of the linkage shaft is fixedly connected to gear three, the lower surface of the grinding box is fixedly connected to a gear ring, and the gear ring and gear three are meshed with each other, and the inner side of the auxiliary plate and the outer end of the linkage shaft are provided with an adjustment mechanism that can drive the linkage shaft to rotate.

[0011] Preferably, the grinding mechanism comprises a rotating disk, which is nested and connected at the center of the upper surface of the fixed cover, and the lower side of the rotating disk is fixedly connected to the energy-saving motor body, and the side of the upper surface of the rotating disk is fixedly connected to the fixed shaft;

[0012] A movable plate is nested and connected to the outside of the fixed shaft, and connecting rods are fixedly connected to the left and right sides of the movable plate, and the outer ends of the connecting rods are fixedly connected to the connecting plates, while a grinding plate is fixedly connected to the lower surface of the connecting plate, and the grinding plate is nested and connected inside the grinding groove.

[0013] Preferably, the limiting plate forms a sliding structure through a connecting plate and a limiting groove, the fixed shaft forms a sliding structure through a rotating disk and a movable plate, and the grinding groove is located directly above the grinding box.

[0014] Preferably, the auxiliary grinding mechanism includes a docking rod, the docking rod is nested and connected to the fixed cover, the upper end of the docking rod is fixedly connected to the lower surface of the connecting rod, and the lower end of the docking rod is fixedly connected to the first tooth plate;

[0015] A gear 1 is fixedly connected to the outer side of the center of the rotating shaft, and a fixed bracket is fixedly connected to the outer side of the rotating shaft, and a grinding roller is nested and connected to the inner side of the lower end of the fixed bracket.

[0016] Preferably, the grinding roller and the inner wall of the grinding box are in contact with each other, and the bottom of the grinding box is arranged in an arc shape, and the grinding roller forms a sliding structure with the grinding box through a fixed bracket.

[0017] Preferably, the gear 1 and the first tooth plate are meshed with each other, and the rotating shaft forms a rotating structure through the gear 1 and the auxiliary plate.

[0018] The adjustment mechanism includes a first airbag, which is fixedly connected to the inner side of the auxiliary plate, and a swing plate is fixedly connected to the outer side of the side end of the rotating shaft;

[0019] A movable groove is provided on the inner side of the auxiliary plate, and a second airbag is fixedly connected to the inner upper end of the movable groove, and a connecting pipe is fixedly connected between the second airbag and the first airbag;

[0020] A push plate is nested inside the movable groove, and a second tooth plate is fixedly connected to the lower end of the push plate. A second gear is fixedly connected to the outer end of the linkage shaft.

[0021] Preferably, the gear 2 and the second tooth plate are meshed with each other, and the second tooth plate and the push plate form an integrated structure, and the push plate forms a sliding structure with the movable groove through the second airbag.

[0022] Preferably, two groups of the first airbags are vertically symmetrically arranged about the center of the auxiliary plate, and the swing plate is located between the two groups of first airbags.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) An energy-saving motor body can drive the grinding mechanism, auxiliary grinding mechanism and adjustment mechanism to operate synchronously. By selecting an electric motor of appropriate capacity to ensure that the energy-saving motor body operates in a high-efficiency range, power loss can be reduced and electric energy can be saved. The inverter performs speed control, which can achieve precise control of the energy-saving motor body and reduce energy consumption.

[0025] (2) The user can place the concrete to be ground inside the grinding tank, then start the energy-saving motor body, and drive the turntable to rotate through the energy-saving motor body. At this time, the turntable will drive the fixed shaft to slide along the inner side of the movable plate and push the movable plate to move back and forth. At this time, the movable plate drives the connecting plate to move back and forth through the connecting rod, and further drives the grinding plate to move inside the grinding tank, thereby grinding the placed concrete and reducing the phenomenon of manual grinding of concrete by staff.

[0026] (3) When the connecting rod moves back and forth, it will synchronously drive the docking rod to move back and forth. At this time, the docking rod will drive the first tooth plate to move back and forth. Under the influence of the meshing action of the first tooth plate, gear 1 drives the rotating shaft to rotate. The rotating shaft also synchronously drives the fixed bracket to rotate back and forth. At this time, the grinding roller arranged at the lower end of the fixed bracket will slide along the inside of the grinding box, thereby crushing and grinding the aggregate inside the grinding box.

[0027] (4) The aggregate that is initially ground inside the grinding trough will fall into the grinding box through the holes set on the grinding trough, and will be further ground under the rotation and rolling of the grinding roller, thereby improving the grinding efficiency.

[0028] (5) When the rotating shaft rotates, it will synchronously drive the swing plate to swing back and forth. At this time, the swing plate will indirectly squeeze the first airbags on both sides. When the first airbags are squeezed, the gas inside will be transported to the inside of the second airbag through the connecting pipe, causing the second airbag to expand and push the push plate to move within a certain range. At this time, the push plate drives the second tooth plate to move, driving gear two to rotate. At this time, the linkage shaft drives gear three to rotate under the drive of gear two. At this time, gear three drives the grinding box to rotate through the gear ring. The grinding box rotates, thereby dumping the ground aggregate inside, reducing the phenomenon of staff manually collecting the ground aggregate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0030] Figure 2 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixed cover of the present invention;

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the turntable of the present invention;

[0033] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the grinding groove of the present invention;

[0034] Figure 6 This is a schematic diagram of the three-dimensional structure of the auxiliary plate of the present invention;

[0035] Figure 7 This is a schematic diagram of the three-dimensional structure of the grinding box of the present invention;

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of the gear of the present invention;

[0037] Fig. 9 It is a schematic diagram of the three-dimensional structure of the first airbag of the present invention;

[0038] Fig.10 It is a schematic diagram of the three-dimensional cross-sectional structure of the movable groove of the present invention.

[0039] In the figure: 1. workbench; 2. fixed cover; 3. fixed plate; 4. discharge port; 5. auxiliary plate; 6. rotating shaft; 7. energy-saving motor body; 8. turntable; 9. fixed shaft; 10. movable plate; 11. connecting rod; 12. connecting plate; 13. grinding plate; 14. grinding groove; 15. grinding box; 16. slide groove; 17. limit plate; 18. limit groove; 19. first tooth plate; 20. gear one; 21. docking rod; 22. grinding roller; 23. gear ring; 24. gear two; 25. gear three; 26. linkage shaft; 27. second tooth plate; 28. fixed bracket; 29. ​​swing plate; 30. movable groove; 31. first air bag; 32. second air bag; 33. connecting pipe; 34. push plate. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Embodiment 1: Figure 1 , Figure 3 , Figure 4 and Figure 5 The technical solution shown in the figure, the present invention provides the following technical solution: an aggregate grinding device for building concrete, disclosing a grinding mechanism, through which the aggregate can be preliminarily ground:

[0042] A workbench 1, a fixed cover 2 is fixedly connected to the side of the upper surface of the workbench 1, a fixed plate 3 is fixedly connected to the center of the upper surface of the workbench 1, and a discharge port 4 is also opened on the side of the center of the upper surface of the workbench 1, and auxiliary plates 5 are fixedly connected to the front and rear sides of the upper surface of the workbench 1;

[0043] A grinding groove 14 is provided on the upper surface of the fixed cover 2, and a limiting groove 18 is also provided on the upper surface of the fixed cover 2, and a limiting plate 17 is nested and connected inside the limiting groove 18, and a connecting plate 12 is fixedly connected to the upper surface of the limiting plate 17, and a grinding mechanism for grinding concrete placed in the grinding groove 14 is provided between the connecting plate 12 and the fixed cover 2;

[0044] The grinding mechanism includes a turntable 8, which is nested and connected at the center of the upper surface of the fixed cover 2, and the lower side of the turntable 8 is fixedly connected to the energy-saving motor body 7, and the upper surface side of the turntable 8 is fixedly connected to the fixed shaft 9, and the outer side of the fixed shaft 9 is nested and connected to a movable plate 10, and the left and right sides of the movable plate 10 are fixedly connected to connecting rods 11, and the outer end of the connecting rod 11 is fixedly connected to a connecting plate 12, and at the same time, the lower surface of the connecting plate 12 is fixedly connected to a grinding plate 13, and the grinding plate 13 is nested and connected inside the grinding groove 14, the limit plate 17 forms a sliding structure with the limit groove 18 through the connecting plate 12, and the fixed shaft 9 forms a sliding structure with the movable plate 10 through the turntable 8, and the grinding groove 14 is located directly above the grinding box 15.

[0045] The user can place the concrete to be ground inside the grinding groove 14, then start the energy-saving motor body 7, and drive the turntable 8 to rotate through the energy-saving motor body 7, at this time the turntable 8 will drive the fixed shaft 9 to slide along the inner side of the movable plate 10, and push the movable plate 10 to reciprocate, at this time the movable plate 10 drives the connecting plate 12 to reciprocate through the connecting rod 11, during the reciprocating movement of the connecting plate 12, it will synchronously drive the limit plate 17 to slide inside the limit groove 18, at this time the limit groove 18 can limit the connecting plate 12 through the limit plate 17, the connecting plate 12 further drives the grinding plate 13 to move inside the grinding groove 14, so as to grind the placed concrete, reducing the phenomenon of manual grinding of concrete by the staff.

[0046] Embodiment 2: Figure 1 , Figure 2 , Figure 4 and Figure 6 The technical solution shown in the figure, the present invention provides the following technical solution: an aggregate grinding device for building concrete, discloses an auxiliary grinding mechanism, through which the aggregate can be further ground, thereby improving the grinding efficiency:

[0047] The grinding box 15 is arranged between the two sets of fixed plates 3, and a slide groove 16 is provided on the inner side of the fixed plate 3, and the outer side of the grinding box 15 is nested and connected inside the slide groove 16, and the inner side of the auxiliary plate 5 is nested and connected with a rotating shaft 6, and an auxiliary grinding mechanism for further grinding concrete is provided between the rotating shaft 6 and the inner side of the grinding box 15;

[0048] The auxiliary grinding mechanism includes a docking rod 21, which is nested and connected to the fixed cover 2, and the upper end of the docking rod 21 is fixedly connected to the lower surface of the connecting rod 11, and the lower end of the docking rod 21 is fixedly connected to the first tooth plate 19, a gear 20 is fixedly connected to the outer side of the center of the rotating shaft 6, and a fixed bracket 28 is fixedly connected to the outer side of the rotating shaft 6, and a grinding roller 22 is nested and connected to the inner side of the lower end of the fixed bracket 28, the grinding roller 22 and the inner wall of the grinding box 15 are in contact with each other, and the bottom of the grinding box 15 is arranged in an arc shape, and the grinding roller 22 forms a sliding structure with the grinding box 15 through the fixed bracket 28, the gear 20 and the first tooth plate 19 are meshed with each other, and the rotating shaft 6 forms a rotating structure with the auxiliary plate 5 through the gear 20.

[0049] When the connecting rod 11 moves back and forth, it will synchronously drive the docking rod 21 to move back and forth. At this time, the docking rod 21 will drive the first tooth plate 19 to move back and forth. Under the influence of the meshing action of the first tooth plate 19, the gear 20 drives the rotating shaft 6 to rotate. The rotating shaft 6 and synchronously drives the fixed bracket 28 to rotate back and forth. At this time, the grinding roller 22 set at the lower end of the fixed bracket 28 will slide along the inside of the grinding box 15, so as to crush and grind the aggregate inside the grinding box 15. The aggregate preliminarily ground inside the grinding groove 14 will fall into the inside of the grinding box 15 through the holes set on the grinding groove 14, and will be further ground under the rotation and crushing of the grinding roller 22, thereby improving the grinding efficiency.

[0050] Embodiment 3: Figure 1 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The technical solution shown in the figure, the present invention provides the following technical solution: an aggregate grinding device for building concrete, discloses an adjustment mechanism, through which the grinding box 15 can be driven to rotate, thereby dumping the aggregate.

[0051] The linkage shaft 26 is nested and connected to the upper surface of the workbench 1, and the inner end of the linkage shaft 26 is fixedly connected to the gear three 25, the lower surface of the grinding box 15 is fixedly connected to the gear ring 23, and the gear ring 23 and the gear three 25 are meshed with each other, and the inner side of the auxiliary plate 5 and the outer end of the linkage shaft 26 are provided with an adjustment mechanism that can drive the linkage shaft 26 to rotate;

[0052] The adjustment mechanism includes a first airbag 31, which is fixedly connected to the inner side of the auxiliary plate 5, and a swing plate 29 is fixedly connected to the outer side of the edge of the rotating shaft 6. A movable groove 30 is opened on the inner side of the auxiliary plate 5, and a second airbag 32 is fixedly connected to the upper end of the movable groove 30, and a connecting pipe 33 is fixedly connected between the second airbag 32 and the first airbag 31. A push plate 34 is nested inside the movable groove 30, and a second tooth plate 27 is fixedly connected to the lower end of the push plate 34, and the outer end of the linkage shaft 26 is fixedly connected to gear 2 24.

[0053] Gear 2 24 and the second tooth plate 27 are meshed with each other, and the second tooth plate 27 and the push plate 34 form an integrated structure, and the push plate 34 forms a sliding structure with the movable groove 30 through the second airbag 32. Two groups of first airbags 31 are vertically symmetrically arranged about the center of the auxiliary plate 5, and the swing plate 29 is located between the two groups of first airbags 31.

[0054] When the rotating shaft 6 rotates, it will synchronously drive the swing plate 29 to swing back and forth. At this time, the swing plate 29 will indirectly squeeze the first air bags 31 on both sides. The first air bags 31 are squeezed and the internal gas will be transported to the inside of the second air bags 32 through the connecting pipes 33. At this time, the second air bags 32 expand, thereby pushing the push plate 34 to move within the movable groove 30. At this time, the push plate 34 drives the second tooth plate 27 to move, and drives the gear 2 24 to rotate through the second tooth plate 27. At this time, the linkage shaft 26 drives the gear 3 25 to rotate under the drive of the gear 2 24. At this time, the gear 3 25 drives the grinding box 15 to rotate through the gear ring 23, and the grinding box 15 rotates, thereby dumping the ground aggregate inside, reducing the phenomenon of staff manually collecting the ground material powder; when the swing plate 29 rotates with the rotating shaft 6 to the middle position of the two first air bags 31, the grinding box 15 will swing back and forth under the action of gravity. At this time, the gear two 24 coaxially fixed with the gear three 25 acts on the second tooth plate 27 to make the push plate 34 move upward and reset. The reciprocating swing of the swing plate 29 makes the push plate 34 move back and forth vertically, thereby driving the grinding box 15 to periodically dump the material powder.

[0055] An energy-saving motor body 7 can drive the grinding mechanism, auxiliary grinding mechanism and adjustment mechanism to operate synchronously. By selecting an electric motor of appropriate capacity, the energy-saving motor body 7 can be ensured to operate in a high-efficiency range, which can reduce power loss and save electric energy. The frequency converter performs speed control, which can achieve precise control of the energy-saving motor body 7 and reduce energy consumption.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An aggregate grinding device for building concrete, comprising a workbench (1), wherein a fixed cover (2) is fixedly connected to the side of the upper surface of the workbench (1), a fixed plate (3) is fixedly connected to the center of the upper surface of the workbench (1), and a discharge port (4) is also provided on the side of the center of the upper surface of the workbench (1), and auxiliary plates (5) are fixedly connected to the front and rear sides of the upper surface of the workbench (1); It is characterized in that Also includes: A grinding groove (14), wherein the grinding groove (14) is provided on the upper surface of the fixed cover (2), and a limiting groove (18) is also provided on the upper surface of the fixed cover (2), and a limiting plate (17) is nested and connected inside the limiting groove (18), and a connecting plate (12) is fixedly connected to the upper surface of the limiting plate (17), and a grinding mechanism for grinding concrete placed in the grinding groove (14) is provided between the connecting plate (12) and the fixed cover (2); A grinding box (15), the grinding box (15) being arranged between the two groups of fixed plates (3), the inner side of the fixed plate (3) being provided with a slide groove (16), the outer side of the grinding box (15) being nested and connected inside the slide groove (16), the inner side of the auxiliary plate (5) being nested and connected with a rotating shaft (6), and an auxiliary grinding mechanism for further grinding concrete being arranged between the rotating shaft (6) and the inner side of the grinding box (15); A linkage shaft (26) is nested and connected to the upper surface of the workbench (1), and the inner end of the linkage shaft (26) is fixedly connected to a gear three (25), the lower surface of the grinding box (15) is fixedly connected to a gear ring (23), and the gear ring (23) and the gear three (25) are meshed with each other, and an adjustment mechanism capable of driving the linkage shaft (26) to rotate is provided on the inner side of the auxiliary plate (5) and the outer end of the linkage shaft (26).

2. The aggregate grinding device for building concrete according to claim 1, characterized in that: The grinding mechanism comprises a rotating disk (8), the rotating disk (8) being nested and connected at the center of the upper surface of the fixed cover (2), the lower side of the rotating disk (8) being fixedly connected to the energy-saving motor body (7), and the upper surface side of the rotating disk (8) being fixedly connected to the fixed shaft (9); A movable plate (10) is nested and connected to the outside of the fixed shaft (9), and connecting rods (11) are fixedly connected to the left and right sides of the movable plate (10), and the outer ends of the connecting rods (11) are fixedly connected to the connecting plates (12), and a grinding plate (13) is fixedly connected to the lower surface of the connecting plate (12), and the grinding plate (13) is nested and connected inside the grinding groove (14).

3. The aggregate grinding device for building concrete according to claim 2, characterized in that: The limiting plate (17) forms a sliding structure through the connecting plate (12) and the limiting groove (18), the fixed shaft (9) forms a sliding structure through the rotating disk (8) and the movable plate (10), and the grinding groove (14) is located directly above the grinding box (15).

4. The aggregate grinding device for building concrete according to claim 1, characterized in that: The auxiliary grinding mechanism comprises a docking rod (21), the docking rod (21) is nested and connected to the fixed cover (2), the upper end of the docking rod (21) is fixedly connected to the lower surface of the connecting rod (11), and the lower end of the docking rod (21) is fixedly connected to the first tooth plate (19); A gear 1 (20) is fixedly connected to the outside of the center of the rotating shaft (6), and a fixed bracket (28) is fixedly connected to the outside of the rotating shaft (6), while a grinding roller (22) is nested and connected to the inside of the lower end of the fixed bracket (28).

5. The aggregate grinding device for building concrete according to claim 4, characterized in that: The grinding roller (22) and the inner wall of the grinding box (15) are in contact with each other, the bottom of the grinding box (15) is arranged in an arc shape, and the grinding roller (22) forms a sliding structure with the grinding box (15) via a fixed bracket (28).

6. The aggregate grinding device for building concrete according to claim 4, characterized in that: The gear one (20) and the first toothed plate (19) are meshed with each other, and the rotating shaft (6) forms a rotating structure through the gear one (20) and the auxiliary plate (5).

7. The aggregate grinding device for building concrete according to claim 1, characterized in that: The adjustment mechanism comprises a first airbag (31), the first airbag (31) being fixedly connected to the inner side of the auxiliary plate (5), and a swing plate (29) being fixedly connected to the outer side of the edge of the rotating shaft (6); A movable groove (30) is provided on the inner side of the auxiliary plate (5), and a second airbag (32) is fixedly connected to the inner upper end of the movable groove (30), and a connecting pipe (33) is fixedly connected between the second airbag (32) and the first airbag (31); A push plate (34) is nested and connected inside the movable groove (30), and a second tooth plate (27) is fixedly connected to the lower end of the push plate (34), and a second gear (24) is fixedly connected to the outer end of the linkage shaft (26).

8. The aggregate grinding device for building concrete according to claim 7, characterized in that: The second gear (24) and the second toothed plate (27) are meshed with each other, and the second toothed plate (27) and the push plate (34) form an integrated structure, and the push plate (34) forms a sliding structure through the second air bag (32) and the movable groove (30).

9. The aggregate grinding device for building concrete according to claim 7, characterized in that: Two groups of the first airbags (31) are vertically symmetrically arranged at the center of the auxiliary plate (5), and the swing plate (29) is located between the two groups of first airbags (31).

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