Gravel aggregate crushing device

Abstract

The utility model relates to the technical field of gravel aggregate processing equipment, in particular to a gravel aggregate crushing device which comprises a mounting base, a grinding machine shell is fixedly mounted on the top end face of the mounting base through welding, a grinding assembly is arranged in the center of the interior of the grinding machine shell, and a crushing machine shell is fixedly mounted on the top end face of the grinding machine shell. The interior of the crushing machine shell communicates with the interior of the grinding machine shell, a rolling assembly is arranged at the top of the inner side of the crushing machine shell, a feeding table is fixedly installed on the end face of the top of the crushing machine shell and located over the top of the rolling assembly, and a dust removal assembly is arranged at the bottom of the inner side of the crushing machine shell. The gravel aggregate crushing device is firm in overall supporting and good in structural stability; the sand-gravel materials are subjected to rolling crushing and grinding crushing, so that the crushing effect of the sand-gravel materials can be effectively improved; and meanwhile, the crushing distance can be conveniently adjusted, so that the granularity of crushed gravel is changed.

Description

TECHNICAL FIELD

[0001] The utility model relates to sandstone material processing equipment technical field especially, relates to a sandstone aggregate crushing device. BACKGROUND

[0002] The sandstone aggregate crushing device is used for crushing natural ores or construction waste and other materials into various specifications of sandstone aggregate or recycled aggregate.

[0003] In the prior art, a sandstone aggregate crushing device is disclosed in CN215029349U, which comprises a base, a machine body fixedly connected to the upper end of the base, a feed inlet formed in the upper end of the machine body, a feed hopper fixedly connected to the position of the upper end of the machine body above the feed inlet, and slide rails fixedly connected to the two sides of the machine body.

[0004] The sandstone aggregate crushing device in the prior art has a simple structure, and the crushing method is single, which affects the crushing quality. UTILITY MODEL CONTENT

[0005] The sandstone aggregate crushing device provided by the utility model has firm overall support and good structural stability.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A sandstone aggregate crushing device comprises an installation base, a grinding machine shell fixedly installed on the top end face of the installation base through welding, a grinding assembly arranged in the central part of the interior of the grinding machine shell, a crusher shell fixedly installed on the top end face of the grinding machine shell, the interior of the crusher shell being in communication with the interior of the grinding machine shell, a roller pressing assembly arranged on the inner top part of the crusher shell, a feeding table fixedly installed on the top end face of the crusher shell, the feeding table being located directly above the top part of the roller pressing assembly, and a dust removal assembly arranged on the inner bottom part of the crusher shell and connected with the grinding assembly.

[0008] The roller pressing assembly comprises a motor support fixedly installed on one side of the other end of the crusher shell, and a first roller pressing motor fixedly installed on the central end face of the motor support, both ends of one side of the crusher shell are provided with an adjusting push frame, and a second roller pressing motor is fixedly installed on the outer side of one of the adjusting push frames, first and second roller pressing shafts are respectively arranged at both ends of the inside of the crusher shell, a first crushing roller is fixedly installed on the outer side of the first roller pressing shaft, and the motor shaft of the first roller pressing motor is fixedly connected with one end of the first crushing roller, a second crushing roller is fixedly installed on the outer side of the second roller pressing shaft, and the motor shaft of the second roller pressing motor is fixedly connected with one end of the second crushing roller.

[0009] Further, an adjusting support is fixedly installed at the position of both ends of one side of the crusher shell, and a first electric cylinder is fixedly installed on the central end face of the adjusting support, a first piston push rod is installed on one end of the first electric cylinder, and one end of the first piston push rod is fixedly connected with the adjusting push frame through the adjusting support; the first electric cylinder is supported by the adjusting support, and the position of the adjusting push frame is adjusted by the first piston push rod when the first electric cylinder works.

[0010] Further, first transmission end covers are fixedly installed on one side of both ends of the crusher shell, and both ends of the first roller pressing shaft are respectively inserted and installed in the central end faces of the two first transmission end covers, and the first roller pressing shaft has stable rotating effect between the first transmission end covers; second transmission end covers are fixedly installed on the other side of both ends of the crusher shell, and both ends of the second roller pressing shaft are respectively inserted and installed in the central end faces of the two second transmission end covers, and the second roller pressing shaft has stable rotating effect between the second transmission end covers; a connecting rod is fixedly installed on the inner wall of the adjusting push frame outside the second transmission end cover, and one end of the inner side of the connecting rod is fixedly connected with the end face of the second transmission end cover, the adjusting push frame is fixedly installed outside the second transmission end cover through the connecting rod, and the structural stability of the adjusting push frame is improved.

[0011] Further, a moving sliding groove is formed in the center of the other side of both ends of the crusher shell, and the second transmission end cover is arranged in the inside of the moving sliding groove, limit grooves are formed in the central top and bottom end faces of the moving sliding groove, moving sliding blocks are fixedly installed on the central top and bottom of the outer wall of the second transmission end cover, and the two moving sliding blocks are respectively in sliding connection with the two limit grooves, when the second transmission end cover moves in the inside of the moving sliding groove, the moving sliding blocks can slide in the inside of the limit grooves, and the moving stability of the second transmission end cover is improved.

[0012] Further, the two ends of the crusher shell are provided with a material blocking chute on the other side of the top, and a material blocking carriage is inserted and connected between the two material blocking chutes. The material blocking carriage is located on the outside of the second crushing roller, and the two ends of the material blocking carriage are fixedly connected with the end faces of the two adjusting pushers through the material blocking chutes. With the movement of the material blocking carriage in the material blocking chute, the position of the material blocking carriage can be adjusted, and the material blocking can be realized through the material blocking carriage.

[0013] Further, the dust removal assembly includes dust removal branch grooves, two of which are respectively provided in the central bottom side end face of the crusher shell, and a connecting end plate is fixedly installed on the inner end face of the dust removal branch groove. A plurality of electrostatic adsorption rods are inserted and connected between the two connecting end plates. A material falling cover is fixedly installed on the bottom side end face of the crusher shell, and is located directly below the bottom of the plurality of electrostatic adsorption rods. The dust removal assembly can facilitate electrostatic adsorption of smoke dust.

[0014] Further, the grinding assembly includes a grinding cylinder, which is arranged in the inner central part of the grinding machine shell, and the bottom of the material falling cover is in communication with the inner top of the grinding cylinder. A conical grinding groove is formed in the inner part of the grinding cylinder, and a grinding table is arranged in the inner bottom central part of the conical grinding groove. A lifting groove is formed in the inner bottom central part of the grinding table. A grinding motor is fixedly installed on the bottom end face of the grinding cylinder, and a grinding shaft is installed on the top end of the grinding motor. A second electric cylinder is connected and installed on the top end of the grinding shaft, which is located in one end of the conical grinding groove. A second piston push rod is installed on the top central part of the second electric cylinder, and the top end of the second piston push rod is fixedly connected with the inner wall of the lifting groove. The grinding assembly facilitates secondary crushing of the aggregate, effectively improving the crushing quality.

[0015] Further, the inner wall of the grinding machine shell is fixedly installed with a mounting wall seat on the central part of the two side end faces, and the inner wall of the two mounting wall seats is fixedly connected with the outer wall of the grinding cylinder. The structural stability of the grinding cylinder is improved.

[0016] Further, the bottom end face of the mounting base is fixedly installed with a load-bearing leg around the periphery through welding, and a buffer bottom pad is fixedly installed on the bottom end face of the load-bearing leg. The load-bearing leg and the buffer bottom pad can support the mounting base, improving the structural stability of the mounting base.

[0017] The sand and gravel aggregate crushing device has the advantages that the overall support is firm, the structural stability is good, electrostatic adsorption dust removal of smoke dust is facilitated through the dust removal assembly, the crushing effect of sand and gravel is effectively improved through the roller pressing assembly and the grinding assembly for roller pressing and grinding crushing of sand and gravel, the crushing interval can be conveniently adjusted, the granularity of sand and gravel crushing is changed, different use requirements are met, the interval between the two crushing rollers is adjusted, the moving sliding block slides in the moving sliding groove with the movement of the crushing roller, the second crushing roller moves with good guiding effect, the second crushing roller moves more stably, and use is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a first overall structure schematic view of the utility model;

[0019] Figure 2 It is a second overall structure schematic view of the utility model;

[0020] Figure 3 It is an overall front view of the utility model;

[0021] Figure 4 It is Figure 3 It is a sectional view of A-A;

[0022] Figure 5 It is an overall plan view of the utility model;

[0023] Figure 6 It is Figure 5 It is a sectional view of B-B;

[0024] Figure 7 It is an overall side view of the utility model;

[0025] Figure 8 It is Figure 7 It is a sectional view of C-C.

[0026] LEGEND KEY:

[0027] 1, installation base; 2, grinding machine shell; 3, crusher shell; 4, roller assembly; 5, feeding table; 6, dust removal assembly; 7, grinding assembly; 8, mounting wall seat; 9, load-bearing leg; 41, motor support; 42, first roller motor; 43, adjusting support; 44, first electric cylinder; 45, first piston push rod; 46, adjusting push bracket; 47, connecting rod; 48, second roller motor; 49, first transmission end cover; 410, first roller shaft; 411, first crushing roller; 412, moving sliding groove; 413, limiting groove; 414, second transmission end cover; 415, moving sliding block; 416, second roller shaft; 417, second crushing roller; 418, material blocking sliding groove; 419, material blocking sliding bracket; 61, dust removal branch groove; 62, connecting end plate; 63, electrostatic adsorption rod; 64, material falling cover; 71, grinding cylinder; 72, conical grinding groove; 73, grinding motor; 74, grinding shaft; 75, second electric cylinder; 76, second piston push rod; 77, grinding table; 78, lifting groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] The specific embodiments are given below.

[0030] Referring to Figures 1-8 A gravel aggregate crushing device, including installation base 1, through installation base 1 has stable, firm load-bearing effect;The top end surface of the installation base 1 is fixedly provided with a grinding machine shell 2 by welding, and the inside central part of the grinding machine shell 2 is provided with a grinding assembly 7, which is convenient for secondary crushing of gravel aggregate, effectively improving the crushing quality;The top end surface of the grinding machine shell 2 is fixedly provided with a crusher shell 3, and the inside of the crusher shell 3 is communicated with the inside of the grinding machine shell 2, and the inside top of the crusher shell 3 is provided with a roller assembly 4, which is convenient for primary crushing of gravel aggregate, effectively improving the crushing efficiency;The top end surface of the crusher shell 3 is fixedly provided with a feeding table 5, and the feeding table 5 is located on the top of the roller assembly 4, which is convenient for feeding materials into the inside of the crusher shell 3 through the feeding table 5;The inside bottom of the crusher shell 3 is provided with a dust removal assembly 6, and the dust removal assembly 6 is connected with the grinding assembly 7, which is convenient for electrostatic adsorption of part of the smoke dust, thereby reducing the smoke dust pollution;

[0031] The roller pressing assembly 4 comprises a motor support 41 fixedly installed on the other side of the crusher shell 3, and a first roller pressing motor 42 fixedly installed on the central end face of the motor support 41, both ends of the side of the crusher shell 3 are provided with adjusting push frames 46, and the outer side of one of the adjusting push frames 46 is fixedly installed with a second roller pressing motor 48, both ends of the inside of the crusher shell 3 are respectively provided with a first roller pressing shaft 410 and a second roller pressing shaft 416, the outer side of the first roller pressing shaft 410 is fixedly installed with a first crushing roller 411, and the motor shaft of the first roller pressing motor 42 is fixedly connected with one end of the first crushing roller 411, the outer side of the second roller pressing shaft 416 is fixedly installed with a second crushing roller 417, and the motor shaft of the second roller pressing motor 48 is fixedly connected with one end of the second crushing roller 417; the adjusting supports 43 are fixedly installed at the positions of both ends of the side of the crusher shell 3, and the first electric cylinders 44 are fixedly installed on the central end face of the adjusting supports 43, the central end of the first electric cylinder 44 is installed with a first piston push rod 45, and the end of the first piston push rod 45 is fixedly connected with the adjusting push frame 46 through the adjusting support 43; the first electric cylinder 44 is supported by the adjusting support 43, and the position of the adjusting push frame 46 can be adjusted by the first piston push rod 45 when the first electric cylinder 44 works; the first transmission end covers 49 are fixedly installed on both sides of the ends of the crusher shell 3, and both ends of the first roller pressing shaft 410 are respectively inserted and installed in the central end faces of the two first transmission end covers 49, and the first roller pressing shaft 410 has stable rotating effect between the first transmission end covers 49; the second transmission end covers 414 are fixedly installed on the other sides of the ends of the crusher shell 3, and both ends of the second roller pressing shaft 416 are respectively inserted and installed in the central end faces of the two second transmission end covers 414, and the second roller pressing shaft 416 has stable rotating effect between the second transmission end covers 414; the connecting rods 47 are fixedly installed on the inner wall of the adjusting push frame 46 outside the second transmission end cover 414, and the inner side of one end of the connecting rod 47 is fixedly connected with the end face of the second transmission end cover 414, the adjusting push frame 46 can be fixedly installed outside the second transmission end cover 414 through the connecting rod 47, and the structural stability of the adjusting push frame 46 is improved; the moving sliding grooves 412 are formed in the central other sides of the ends of the crusher shell 3, and the second transmission end cover 414 is arranged in the inside of the moving sliding groove 412, the limit grooves 413 are formed in the central end faces of the top and bottom of the moving sliding groove 412, the moving sliding blocks 415 are fixedly installed on the outer wall of the second transmission end cover 414, and the two moving sliding blocks 415 are respectively in sliding connection with the two limit grooves 413, when the second transmission end cover 414 moves in the inside of the moving sliding groove 412, the moving sliding block 415 can slide in the inside of the limit groove 413, and the moving stability of the second transmission end cover 414 is improved.The other side top of the two ends of the crusher shell 3 is provided with a material blocking chute 418, and a material blocking carriage 419 is inserted and installed between the two material blocking chutes 418. The material blocking carriage 419 is located on the outside of the second crushing roller 417, and the two ends of the material blocking carriage 419 are fixedly connected with the end faces of the two adjusting pushers 46 through the material blocking chutes 418. With the movement of the material blocking carriage 419 in the inside of the material blocking chute 418, the position of the material blocking carriage 419 can be adjusted, and the material blocking is carried out through the material blocking carriage 419. In use, according to the particle size required for processing, the distance between the second crushing roller 417 and the first crushing roller 411 is adjusted, the first electric cylinder 44 outside the support 43 is adjusted to work, the adjusting pusher 46 is moved by the first piston push rod 45, and with the movement of the adjusting pusher 46, the second transmission end cover 414 can be moved in the inside of the moving chute 412 through the connecting rod 47, and the moving block 415 and the limiting groove 413 are made to slide, and the material blocking carriage 419 is moved in the inside of the material blocking chute 418, and with the movement of the second transmission end cover 414, the second roller pressing shaft 416 and the second crushing roller 417 are moved, so that the gap between the second crushing roller 417 and the first crushing roller 411 is adjusted. The first roller pressing motor 42 on the end face of the motor support 41 works, the first roller pressing shaft 410 is rotated by the motor shaft, and the second roller pressing motor 48 works, the second roller pressing shaft 416 is driven by the motor shaft, and then the second crushing roller 417 and the first crushing roller 411 are rotated. The material to be processed is put into the inside of the crusher shell 3 through the feeding table 5, when the material contacts with the rotating second crushing roller 417 and the first crushing roller 411, the material can be crushed by roller pressing, and the splashed material can be shielded by the material blocking carriage 419.

[0032] The dust removal assembly 6 comprises a dust removal branch groove 61, two dust removal branch grooves 61 are respectively formed in the central bottom side end face of the crusher shell 3, and a connecting end plate 62 is fixedly installed on the inside end face of the dust removal branch groove 61. A plurality of electrostatic adsorption rods 63 are inserted and installed between the two connecting end plates 62. A material falling cover 64 is fixedly installed on the bottom side end face of the crusher shell 3, and the material falling cover 64 is located directly below the plurality of electrostatic adsorption rods 63. The dust removal assembly 6 can facilitate electrostatic adsorption of smoke dust. The electrostatic adsorption rods 63 can be supported by the connecting end plates 62 between the dust removal branch grooves 61. When the electrostatic adsorption rods 63 work, the floating smoke dust can be electrostatically adsorbed, and the roller-pressed and crushed material falls into the inside of the grinding cylinder 71 through the material falling cover 64.

[0033] The grinding assembly 7 comprises a grinding barrel 71 which is arranged in the inner center of the grinding shell 2, and the bottom of the blank cover 64 is communicated with the inner top of the grinding barrel 71, the inner side of the grinding barrel 71 is provided with a conical grinding groove 72, and the inner bottom center of the conical grinding groove 72 is provided with a grinding table 77, the inner bottom center of the grinding table 77 is provided with a lifting groove 78, the bottom end surface of the grinding barrel 71 is fixedly installed with a grinding motor 73, and the top end of the grinding motor 73 is installed with a grinding shaft 74, the top end of the grinding shaft 74 is connected and installed with a second electric cylinder 75 at one end of the inner side of the conical grinding groove 72, the top end center of the second electric cylinder 75 is installed with a second piston push rod 76, and the top end of the second piston push rod 76 is fixedly connected with the inner wall of the lifting groove 78; the grinding assembly 7 is convenient for secondary crushing processing of the aggregate, effectively improves the crushing quality, according to the granularity of the grinding material, the second electric cylinder 75 in the grinding shaft 74 works, the inner wall of the lifting groove 78 is pushed by the second piston push rod 76, so that the height of the grinding table 77 is adjusted, so that the gap between the outer wall bottom of the grinding table 77 and the inner wall of the conical grinding groove 72 is adjusted, when the grinding motor 73 works, the grinding table 77 is driven to rotate in the conical grinding groove 72 by the motor shaft, the bottom side outer wall of the grinding table 77 is rubbed and crushed with the inner wall of the conical grinding groove 72, so that the material is subjected to secondary grinding treatment.

[0034] The inner wall of the grinding shell 2 is fixedly installed with a mounting wall seat 8 at the center of the two side end surfaces, and the inner wall of the two mounting wall seats 8 is fixedly connected with the outer wall of the grinding barrel 71; the structural stability of the grinding barrel 71 is improved.

[0035] The bottom end surface of the mounting base 1 is fixedly installed with a bearing leg 9 around through welding, and the bottom end surface of the bearing leg 9 is fixedly installed with a buffer bottom pad; the mounting base 1 can be supported by the bearing leg 9 and the buffer bottom pad, and the structural stability of the mounting base 1 is improved.

[0036] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A sand and gravel aggregate breaking device, characterized by, The application relates to a grinding and crushing machine, which comprises a mounting base (1), a grinding shell (2) fixedly arranged on the top end face of the mounting base (1) by welding, a grinding assembly (7) arranged in the central part of the interior of the grinding shell (2), a crusher shell (3) fixedly arranged on the top end face of the grinding shell (2), and the interior of the crusher shell (3) is communicated with the interior of the grinding shell (2), a roller pressing assembly (4) arranged on the inner top part of the crusher shell (3), a feeding table (5) fixedly arranged on the top end face of the crusher shell (3) and located directly above the roller pressing assembly (4), and a dust removal assembly (6) arranged on the inner bottom part of the crusher shell (3) and connected with the grinding assembly (7). The roller pressing assembly (4) comprises a motor support (41) fixedly arranged on one side of the other end of the crusher shell (3), a first roller pressing motor (42) fixedly arranged on the central part of the end face of the motor support (41), adjusting push frames (46) arranged on the edges of the two ends of one side of the crusher shell (3), a second roller pressing motor (48) fixedly arranged on the outer side of one of the adjusting push frames (46), first roller pressing shafts (410) and second roller pressing shafts (416) respectively arranged on the two ends of the interior of the crusher shell (3), a first crushing roller (411) fixedly arranged on the outer side of the first roller pressing shaft (410), a motor shaft of the first roller pressing motor (42) fixedly connected with one end of the first crushing roller (411), a second crushing roller (417) fixedly arranged on the outer side of the second roller pressing shaft (416), and a motor shaft of the second roller pressing motor (48) fixedly connected with one end of the second crushing roller (417).

2. A sand and gravel aggregate crushing device according to claim 1, characterized in that Adjusting supports (43) are fixedly arranged on the edges of the two ends of one side of the crusher shell (3), first electric cylinders (44) are fixedly arranged on the central parts of the end faces of the adjusting supports (43), first piston push rods (45) are arranged on one end of the first electric cylinders (44), and one end of the first piston push rod (45) is fixedly connected with the adjusting push frame (46) through the adjusting support (43).

3. A sand and gravel aggregate crushing device as claimed in claim 2, characterized in that First transmission end covers (49) are fixedly arranged on one side of the two ends of the crusher shell (3), the two ends of the first roller pressing shaft (410) are respectively inserted and arranged in the central parts of the end faces of the two first transmission end covers (49), second transmission end covers (414) are fixedly arranged on the other side of the two ends of the crusher shell (3), the two ends of the second roller pressing shaft (416) are respectively inserted and arranged in the central parts of the end faces of the two second transmission end covers (414), and connecting rods (47) are fixedly arranged on the inner walls of the adjusting push frames (46) and located on the outer sides of the second transmission end covers (414).

4. A sand and gravel aggregate crushing device as claimed in claim 3, characterized in that The other side of the two ends of the crusher shell (3) is centrally provided with a moving sliding groove (412), and a second transmission end cover (414) is arranged inside the moving sliding groove (412). The top and bottom end faces of the moving sliding groove (412) are centrally provided with limiting grooves (413). The outer wall top and bottom center of the second transmission end cover (414) is fixedly installed with a moving sliding block (415), and the two moving sliding blocks (415) are respectively connected with the two limiting grooves (413) in a sliding manner.

5. A sand and gravel aggregate crushing device as claimed in claim 4, characterised in that, The top of the other side of the two ends of the crusher shell (3) is provided with a material blocking sliding groove (418), and a material blocking sliding frame (419) is inserted and installed between the two material blocking sliding grooves (418). The material blocking sliding frame (419) is located on the outside of the second crushing roller (417), and the two ends of the material blocking sliding frame (419) are fixedly connected with the end faces of the two adjusting push frames (46) through the material blocking sliding grooves (418).

6. A sand and gravel aggregate crushing device as claimed in claim 5, characterised in that, The dust removal assembly (6) comprises a dust removal branch groove (61), and two dust removal branch grooves (61) are respectively arranged in the central bottom side end face of the crusher shell (3). The inner end face of the dust removal branch groove (61) is fixedly installed with a connecting end plate (62), and a plurality of electrostatic adsorption rods (63) are inserted and installed between the two connecting end plates (62). The bottom side end face of the crusher shell (3) is fixedly installed with a material falling cover (64), and the material falling cover (64) is located directly below the bottom of the plurality of electrostatic adsorption rods (63).

7. A sand and gravel aggregate crushing device as claimed in claim 6, characterised in that, The grinding assembly (7) comprises a grinding cylinder (71), which is arranged in the inner central part of the grinding machine shell (2), and the bottom of the material falling cover (64) is communicated with the inner top of the grinding cylinder (71). The inner side of the grinding cylinder (71) is provided with a conical grinding groove (72), and the inner bottom center of the conical grinding groove (72) is provided with a grinding table (77). The inner bottom center of the grinding table (77) is provided with a lifting groove (78). The bottom end face of the grinding cylinder (71) is fixedly installed with a grinding motor (73), and the top end of the grinding motor (73) is installed with a grinding shaft (74). The top end of the grinding shaft (74) is connected and installed with a second electric cylinder (75) at one end inside the conical grinding groove (72) through the grinding cylinder (71). The top center of the second electric cylinder (75) is installed with a second piston push rod (76), and the top end of the second piston push rod (76) is fixedly connected with the inner wall of the lifting groove (78).

8. A sand and gravel aggregate crushing device as claimed in claim 7, characterised in that, The inner wall of the grinding machine shell (2) is fixedly installed with a mounting wall seat (8) at the central part of the two side end faces, and the inner wall of the two mounting wall seats (8) is fixedly connected with the outer wall of the grinding cylinder (71).

9. A sand and aggregate breaking device as claimed in claim 8, wherein, The bottom end face of the mounting base (1) is fixedly installed with a load-bearing leg (9) around the periphery through welding, and the bottom end face of the load-bearing leg (9) is fixedly installed with a buffer bottom pad.

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