Roller body structure of laboratory eccentric roll crusher

Abstract

This utility model relates to the roller structure of a laboratory-type eccentric roller crusher, belonging to the field of mechanical design. The roller body is hollow internally, with an outer sealing ring connected to the end face of the roller body. The surface of the roller body has two axially symmetrically arranged positioning grooves, each containing end positioning welding blocks and several arrayed tooth pitch adjustment blocks. The crushing teeth employ a double-connecting block circumferential positioning system, with each crushing tooth having connecting blocks orthogonally distributed at 180 degrees. Each connecting block precisely fits into the groove formed by adjacent tooth pitch adjustment blocks. A fixing ring is fixed to the roller body, and the number of crushing teeth is adjusted by adjusting the width of the tooth pitch adjustment blocks. Advantages include: a lightweight roller design that significantly reduces the roller's mass and inertial power consumption during crushing; adjustable tooth pitch to increase or decrease the number of teeth according to actual crushing requirements; and a thin-tip, thick-root design for the crushing teeth to reduce the crushing area and increase the crushing force.

Description

Technical Field

[0001] This utility model relates to the field of mechanical design, and in particular to a roller structure for a laboratory-type eccentric roller crusher. It serves as a reference for the design of large-scale mining eccentric roller crushers. Background Technology

[0002] With the acceleration of global industrialization, market demand for mineral resources has increased significantly. Statistics show that global annual consumption of metal ores is projected to grow by 47% from 2020 to 2030, while surface-minable high-grade ore reserves are less than 30% of total demand. This supply-demand imbalance is forcing mining operations to extend deeper underground. Currently, underground mines generally operate at depths exceeding 1000 meters, and the working space is limited by tunnel dimensions. Traditional jaw crushers and cone crushers, due to their excessive height, are difficult to operate in confined spaces. Faced with market demand, there is an urgent need for an ore crusher suitable for underground operations. Against this backdrop, the eccentric roller crusher, with its unique flat structure, has become the preferred solution for underground crushing. The roller body is the core component of the eccentric roller crusher. Existing roller bodies are generally solid (such as those in high-pressure roller mills). Solid roller bodies not only increase installation difficulty but also increase the power required for equipment startup and operation, increasing the burden on the motor and further complicating underground crushing work. Therefore, a lightweight roller design is urgently needed. Summary of the Invention

[0003] The purpose of this invention is to provide a roller structure for a laboratory-type eccentric roller crusher, solving the problem of excessively heavy rollers that are unsuitable for underground crushing operations. This invention's lightweight, detachable roller structure reduces the power required for equipment startup and operation, and facilitates roller installation, providing convenience for underground crushing work. Designing the roller portion used for crushing ore as a hollow structure not only ensures crushing strength but also significantly reduces the roller's mass and inertial power consumption during the crushing process, while improving the production efficiency of the eccentric roller crusher. Furthermore, the hollow roller structure facilitates installation, achieving a synergistic improvement in equipment mobility and crushing efficiency in deep-earth mining scenarios.

[0004] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0005] The roller structure of the laboratory-type eccentric roller crusher is hollow inside. The overall structure includes a fixing ring 1, roller body 2, positioning groove 3, crushing teeth 4, tooth pitch adjustment block 5, end positioning welding block 6, fixing bolt 1 7, outer ring sealing ring 8, fixing bolt 2 9, inner ring sealing ring 10, flat key 11, eccentric bushing 12, rolling bearing 13, rolling element 14, bushing 15, threaded hole 16, and oil hole 17. The fixed ring 1, positioning groove 3, breaking tooth 4, tooth pitch adjusting block 5, end positioning welding block 6, outer ring sealing ring 8, fixing bolt 2 9, inner ring sealing ring 10, flat key 11, eccentric bushing 12, rolling bearing 13, bushing 15, threaded hole 16, and oil hole 17 are respectively fixed on the roller body 2; the outer ring sealing ring 8 is rigidly connected to the end face of the roller body 2 by fixing bolt 1 7, and the labyrinth groove on it forms a sealing interference zone with the inner ring sealing ring 10; the surface of the roller body 2 is provided with two axially symmetrically arranged positioning grooves, and the positioning grooves 3 are provided with end... The positioning welding block 6 and several array-type tooth pitch adjustment blocks 5; the crushing tooth 4 adopts a double connecting block circumferential positioning system, each crushing tooth is provided with connecting blocks distributed orthogonally at 180 degrees, the connecting block 18 is precisely fitted into the groove formed by adjacent tooth pitch adjustment blocks, the connecting block of the rightmost crushing tooth is installed in the groove formed by the end positioning welding block 6 and the tooth pitch adjustment block, and the connecting block of the leftmost crushing tooth is installed in the groove formed by the fixing ring 1 and the tooth pitch adjustment block; the fixing ring 1 is fixed to the roller body 2 by fixing bolt 2 9, and the number of crushing teeth 4 is adjusted by adjusting the width of the tooth pitch adjustment block 5.

[0006] The outer ring of the breaking tooth 4 is designed with a thin tooth tip and a thick tooth root.

[0007] The rolling bearing 13 is adjacent to the outer ring seal 8 and is positioned by the eccentric bushing 12.

[0008] The bushing 15 is designed as a split type, with two split bushings pre-tightened by 10 sets of M12 grade fine thread bolts, and the external support of the bushing is on the inside of the roller body.

[0009] The eccentric bushing 12 provides the eccentricity between the roller body 2 and the eccentric shaft. The empty part inside the eccentric bushing 12 and the bushing 15 is the mounting part of the eccentric shaft. The keyways on the shaft heads on both sides of the eccentric shaft cooperate with the flat key 11 on the eccentric bushing 12 so that the eccentric shaft drives the roller body to rotate when it rotates.

[0010] An oil hole 17 is installed on the eccentric bushing 12 to provide lubrication for the roller body 2 and the eccentric shaft.

[0011] The beneficial effects of this invention are as follows: The roller body adopts a lightweight design, making the interior of the roller hollow, which greatly reduces the weight of the roller body and the inertial power consumption during the crushing process. In actual crushing operations, the tooth pitch can be adjusted according to the actual crushing requirements, thereby increasing or decreasing the number of teeth. The crushing teeth adopt a design with thin tooth tips and thick tooth roots, which reduces the crushing area and increases the crushing force. The lightweight design of the roller body not only provides sufficient strength but also facilitates future maintenance and management. Overall, the roller body structure is clearly and compactly arranged, making it very suitable for underground operations. Attached Figure Description

[0012] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, illustrate the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0013] Figure 1 This is a schematic diagram of the roller structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the main body of the roller of this utility model;

[0015] Figure 3 This is a schematic cross-sectional view of the roller structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the crushing tooth structure of this utility model.

[0017] In the diagram: 1. Fixed ring; 2. Roller body; 3. Positioning groove; 4. Crushing tooth; 5. Tooth pitch adjustment block; 6. End positioning welding block; 7. Fixing bolt one; 8. Outer ring sealing ring; 9. Fixing bolt two; 10. Inner ring sealing ring; 11. Flat key; 12. Eccentric bushing; 13. Rolling bearing; 14. Rolling element; 15. Bushing; 16. Threaded hole; 17. Oil hole; 18. Connecting block. Detailed Implementation

[0018] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. 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. To make the above-mentioned objects, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the roller structure of the laboratory-type eccentric roller crusher of this utility model has a hollow interior. The overall structure includes a fixing ring 1, a roller body 2, a positioning groove 3, crushing teeth 4, a tooth pitch adjustment block 5, an end positioning welding block 6, a fixing bolt 1 7, an outer ring sealing ring 8, a fixing bolt 2 9, an inner ring sealing ring 10, a flat key 11, an eccentric bushing 12, a rolling bearing 13, a rolling element 14, a bushing 15, a threaded hole 16, an oil hole 17, and a connecting block 18.

[0020] The fixed ring 1, positioning groove 3, breaking tooth 4, tooth pitch adjusting block 5, end positioning welding block 6, outer ring sealing ring 8, fixing bolt 2 9, inner ring sealing ring 10, flat key 11, eccentric bushing 12, rolling bearing 13, bushing 15, threaded hole 16, and oil hole 17 are respectively fixed on the roller body 2. The rolling element 14 is circumferentially installed in the rolling bearing 13.

[0021] The roller structure is as follows: the outer sealing ring 8 is rigidly connected to the end face of the roller body 2 by 8 sets of M8×30 ​​stainless steel internal hexagon fixing bolts 7 in the circumferential direction, and its labyrinth groove forms a sealing interference zone with the inner sealing ring 10.

[0022] The roller body 2 has two axially symmetrically arranged positioning grooves on its surface. The positioning grooves 3 contain end positioning welding blocks 6 and several arrayed tooth pitch adjustment blocks 5. The crushing teeth 4 employ a double connecting block circumferential positioning system. Each crushing tooth has connecting blocks orthogonally distributed at 180 degrees. The connecting blocks 18 are precisely fitted into the grooves formed by adjacent tooth pitch adjustment blocks. The connecting block of the rightmost crushing tooth is installed in the groove formed by the end positioning welding block 6 and the tooth pitch adjustment block, while the connecting block of the leftmost crushing tooth is installed in the groove formed by the fixing ring 1 and the tooth pitch adjustment block. The fixing ring 1 is fixed to the roller body 2 by fixing bolts 29. The number of crushing teeth 4 can be adjusted by adjusting the width of the tooth pitch adjustment blocks 5. The outer ring of the crushing teeth 4 is the ore crushing section. This part needs to be designed to ensure that the crushing force of the roller body is large enough; otherwise, the ore will get stuck in the crushing chamber, damaging the motor. Therefore, the crushing section is designed with thin tooth tips and thick tooth roots to reduce the crushing area and increase the crushing force.

[0023] The rolling bearing 13 is adjacent to the outer ring sealing ring 8 and positioned by the eccentric bushing 12. For ease of installation and lightweight design, the bushing 15 is designed as a split type. The two split bushings are pre-tightened by 10 sets of M12 fine-pitch bolts, and the external support of the bushing 15 rests on the inside of the roller body. The main function of the eccentric bushing 12 is to provide the eccentricity between the roller body and the eccentric shaft, which is crucial for the movement of the eccentric roller crusher. The open portions inside the eccentric bushing 12 and bushing 15 are the mounting portions for the eccentric shaft. The keyways on both sides of the eccentric shaft head engage with the flat key 11 on the eccentric bushing 12, allowing the eccentric shaft to rotate and drive the roller body to rotate. The eccentric bushing 12 is equipped with oil holes 17 to provide lubrication for the roller body structure and eccentric shaft during operation.

[0024] In operation, the motor provides a driving torque to the eccentric shaft, causing it to start rotating. The eccentric shaft is connected to the eccentric bushing 12 via the flat key 11. When the eccentric shaft starts rotating, the eccentric bushing also rotates with it. Under friction, the eccentric bushing drives the rolling bearing 13 to rotate. At the same time, the roller body 2 also rotates with the rolling bearing under friction.

[0025] Crushing teeth 4 are distributed on the surface of the roller body 2 for crushing tasks. To prevent the crushing teeth from falling off during operation, they are fixed to the surface of the roller body by a tooth pitch adjustment block 5, an end positioning welding block 6, and a fixing ring 1. During the ore crushing process, to prevent the roller body from being subjected to excessive force and thus deforming, a bushing 15 is installed on the eccentric shaft to support the roller body.

[0026] During ore crushing, the ore is squeezed between the rollers and jaw plates to achieve the purpose of crushing. In operation, the rollers rotate in a circle around the center of the eccentric shaft and also rotate on their own axis. When the motor starts but before ore crushing, i.e., under no-load conditions, the rollers are not in contact with the ore, so the compressive force exerted by the ore on the rollers is zero. However, the rollers are connected to the eccentric shaft via rolling bearings and there is relative motion. The rollers experience a frictional torque from the bearings, causing them to rotate in the same direction as the eccentric shaft. After the motor starts and the ore is crushed, i.e. under load, because the center of the roller's rotation does not coincide with the center of the roller's circular motion around the eccentric axis, when the roller squeezes the ore, the main force of the ore on the roller is not directed towards the center of the roller, but is applied to the roller in a direction biased towards the center of the roller. This causes the roller to rotate in the opposite direction to the rotation of the eccentric axis when crushing the ore, in order to reduce the friction on the roller surface.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made to this utility model should be included within the protection scope of this utility model.

Claims

1. A roll body structure of a laboratory-type eccentric roll crusher, characterized by: The inside of the roller body is hollow. The fixing ring (1), positioning groove (3), breaking tooth (4), tooth pitch adjustment block (5), end positioning welding block (6), outer ring sealing ring (8), fixing bolt two (9), inner ring sealing ring (10), flat key (11), eccentric bushing (12), rolling bearing (13), bushing (15), threaded hole (16), and oil hole (17) are respectively fixed on the roller body (2). The outer ring sealing ring (8) is rigidly connected to the end face of the roller body (2) by fixing bolt one (7), and the labyrinth groove on it forms a sealing interference zone with the inner ring sealing ring (10). The surface of the roller body (2) is provided with two axially symmetrically arranged... The positioning groove (3) is provided with end positioning welding block (6) and several array-type tooth pitch adjustment blocks (5); the crushing tooth (4) adopts a double connecting block circumferential positioning system. Each crushing tooth is provided with connecting blocks distributed at 180 degrees orthogonally. The connecting block (18) is precisely fitted into the groove formed by the adjacent tooth pitch adjustment blocks. The connecting block of the rightmost crushing tooth is installed next to the end positioning welding block and in the groove formed by the tooth pitch adjustment block. The connecting block of the leftmost crushing tooth is installed next to the fixing ring and in the groove formed by the tooth pitch adjustment block. The fixing ring (1) is fixed to the roller body (2) by fixing bolt two (9). The number of crushing teeth (4) is adjusted by adjusting the width of the tooth pitch adjustment block (5).

2. The roller body structure of a laboratory-type eccentric roll crusher according to claim 1, characterized in that: The outer ring of the breaking tooth (4) is designed to be thin at the tooth tip and thick at the tooth root.

3. The roller structure of the laboratory-type eccentric roller crusher according to claim 1, characterized in that: The rolling bearing (13) is adjacent to the outer ring sealing ring (8) and is positioned by an eccentric bushing (12).

4. The roller body structure of a laboratory-type eccentric roll crusher according to claim 1, characterized in that: The bushing (15) is designed as a split type, with two split bushings pre-tightened by 10 sets of M12 grade fine thread bolts, and the external support of the bushing is on the inside of the roller body.

5. The roller body structure of a laboratory-type eccentric roll crusher according to claim 1, characterized in that: The eccentric bushing (12) provides the eccentricity between the roller body (2) and the eccentric shaft. The empty part inside the eccentric bushing (12) and the bushing (15) is the mounting part of the eccentric shaft. The keyway on the shaft head on both sides of the eccentric shaft cooperates with the flat key (11) on the eccentric bushing (12) so that the eccentric shaft drives the roller body to rotate when it rotates.

6. The roller body structure of a laboratory-type eccentric roll crusher according to claim 5, characterized in that: The eccentric bushing (12) is equipped with an oil hole (17).

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