Novel grinding device for machinery

Abstract

The invention relates to the technical field of grinding and discloses a novel mechanical grinding device which comprises a grinding tank, a coarse grinding assembly and a fine grinding assembly are arranged in the grinding tank, the upper end face of the grinding tank is connected with a feeding hopper, a discharging hole is formed in the lower end face of the grinding tank, and the coarse grinding assembly comprises a first grinding roller, a screening plate and a backflow hole. The grinding device has the advantages that the two-step type grinding logic that the coarse grinding assembly conducts crushing first and the fine grinding assembly conducts fine machining is adopted, the problems that a single grinding structure is not thorough in coarse grinding and low in fine grinding efficiency are solved, the scientific process that crushing is conducted first and then grinding is conducted is achieved, the overall grinding efficiency and the finished product precision are greatly improved, and the product quality is improved. The first servo motor drives the first grinding roller to rotate at a high speed, extrusion and shearing force are formed between the first grinding roller and the inner wall of the grinding tank, blocky and large-particle materials can be rapidly crushed into coarse materials, and equipment blockage or insufficient grinding caused by the fact that the large-size materials directly enter a fine grinding area is avoided.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, specifically to a novel grinding device for machinery. Background Technology

[0002] In the fields of machinery manufacturing, parts processing, and material pretreatment, grinding is the core link to achieve fine material processing. Its purpose is to process blocky and coarse-grained materials into fine-grained or powdered materials that meet the precision requirements through physical extrusion and shearing, so as to provide a foundation for subsequent parts forming, surface polishing, assembly and fitting processes.

[0003] Most existing mechanical grinding devices use a single grinding roller structure. A single grinding structure cannot optimize parameters for different needs of coarse grinding and fine grinding (e.g., coarse grinding requires high speed to improve crushing efficiency, while fine grinding requires low speed to ensure grinding accuracy). If a uniform speed is used, it is easy to cause problems such as coarse material not being ground thoroughly or fine material being over-ground, resulting in agglomeration. Therefore, we propose a new type of mechanical grinding device. Summary of the Invention

[0004] The purpose of this invention is to provide a novel grinding device for machinery.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel grinding device for machinery, comprising a grinding jar, wherein a coarse grinding component and a fine grinding component are disposed inside the grinding jar;

[0006] The coarse grinding assembly includes a first grinding roller, a screening plate, and a reflux hole. The side of the first grinding roller is rotatably connected to the inner wall of the grinding tank, the side of the screening plate is connected to the inner wall of the grinding tank, and the reflux hole is opened on the side of the first grinding roller.

[0007] The fine grinding assembly includes a drive shaft, a second grinding roller, a spiral blade, and a connecting block. The side of the spiral blade is drivenly connected to the inner wall of the first grinding roller, the side of the connecting block is connected to the inner wall of the second grinding roller, and the inner wall of the second grinding roller is slidably connected to the side of the drive shaft.

[0008] As a further aspect of the present invention: a first servo motor is connected to the upper end face of the grinding jar, and the output end of the first servo motor passes through the inner wall of the grinding jar and is connected to the side of the first grinding roller.

[0009] As a further aspect of the present invention: a second servo motor is connected to the lower end face of the grinding jar, and the output end of the second servo motor is connected to one end of the transmission shaft.

[0010] As a further aspect of the present invention: an electric telescopic rod is connected to the inner wall of the transmission shaft, and the telescopic end of the electric telescopic rod is connected to the side of the connecting block.

[0011] As a further aspect of the present invention: the side of the connecting block is slidably connected to the inner wall of the transmission shaft.

[0012] As a further aspect of the present invention: the side of the drive shaft is rotatably connected to the inner wall of the screening plate.

[0013] As a further aspect of the present invention: the side of the helical blade is connected to the side of the transmission shaft.

[0014] As a further aspect of the present invention: the reflux hole and the internal space of the first grinding roller together form a reflux channel.

[0015] As a further aspect of the present invention: the upper end face of the grinding jar is connected to a feed hopper, and the lower end face of the grinding jar is provided with a discharge hole.

[0016] Compared with the prior art, the beneficial effects of the present invention by adopting the above technical solution are as follows:

[0017] 1. This invention employs a two-step grinding logic: a coarse grinding component for initial crushing followed by a fine grinding component for fine processing. This solves the problems of incomplete coarse grinding and low efficiency in fine grinding in a single grinding structure. It also achieves a scientific process of crushing before grinding, significantly improving overall grinding efficiency and finished product precision. The first servo motor drives the first grinding roller to rotate at high speed, forming a squeezing and shearing force with the inner wall of the grinding tank. This can quickly crush blocky and large-particle materials into coarse materials, avoiding equipment jamming or insufficient grinding caused by large-sized materials directly entering the fine grinding area. The screening plate achieves real-time grading through aperture control, allowing only materials that meet the coarse grinding standards to enter the fine grinding stage. Unqualified coarse materials are intercepted and returned, ensuring that the initial particle size of the materials entering the fine grinding is uniform, reducing grinding differences during the fine grinding process, and improving the particle size consistency of the final product.

[0018] 2. This invention uses a second servo motor to drive the transmission shaft and the second grinding roller to rotate synchronously. By utilizing the squeezing and grinding action of the second grinding roller and the transmission shaft, the coarse material is further crushed into fine material, which meets the requirements of machining for high fineness materials. Compared with the traditional single grinding roller structure, the graded design of the double grinding roller can optimize the grinding parameters of each step (such as the coarse grinding speed focusing on "crushing efficiency" and the fine grinding speed focusing on "grinding accuracy"), avoiding compromise on grinding effect due to "balancing coarse and fine requirements".

[0019] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0020] Figure 1This is a schematic diagram of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the first grinding roller in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the screening plate in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the second grinding roller in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the reflux hole in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the connecting block in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the drive shaft in an embodiment of the present invention.

[0027] In the diagram: 1. Grinding tank; 2. Coarse grinding assembly; 21. First servo motor; 22. First grinding roller; 23. Screening plate; 24. Return hole; 3. Fine grinding assembly; 31. Second servo motor; 32. Drive shaft; 33. Second grinding roller; 34. Spiral blade; 35. Connecting block; 36. Electric telescopic rod; 4. Feed hopper; 5. Discharge hole. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0029] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Please see the appendix Figure 1 - Appendix Figure 7 The present invention discloses a novel grinding device for machinery, comprising a grinding tank 1, wherein a coarse grinding component 2 and a fine grinding component 3 are provided inside the grinding tank 1, a feed hopper 4 is connected to the upper end face of the grinding tank 1, and a discharge hole 5 is provided on the lower end face of the grinding tank 1.

[0031] In Embodiment 1, the coarse grinding assembly 2 includes a first grinding roller 22, a screening plate 23, and a reflux hole 24. The side of the first grinding roller 22 is rotatably connected to the inner wall of the grinding tank 1, the side of the screening plate 23 is connected to the inner wall of the grinding tank 1, the reflux hole 24 is opened on the side of the first grinding roller 22, a first servo motor 21 is connected to the upper end face of the grinding tank 1, the output end of the first servo motor 21 passes through the inner wall of the grinding tank 1 and is connected to the side of the first grinding roller 22, the side of the drive shaft 32 is rotatably connected to the inner wall of the screening plate 23, the side of the spiral blade 34 is connected to the side of the drive shaft 32, and the reflux hole 24 and the internal space of the first grinding roller 22 together form a reflux channel.

[0032] Specifically, the side of the first grinding roller 22 is rotatably connected to the inner wall of the grinding tank 1 with a clearance fit. The clearance value needs to be set according to the initial particle size of the material to be ground (for example, for blocky metal materials with a diameter of 5-10mm, the clearance is usually set to 8-12mm). This ensures that the first grinding roller 22 does not rub against the tank wall when rotating at high speed, and also forms a crushing space through the gap. The upper end of the first grinding roller 22 is rigidly connected to the output end of the first servo motor 21 through a coupling. The coupling is made of elastic material (such as a rubber buffer coupling), which can reduce the impact force when the motor starts and avoid deformation of the first grinding roller 22 due to excessive instantaneous torque.

[0033] The screening plate 23 is a circular metal plate structure. The aperture of the screening plate 23 must match the coarse grinding qualification standard. For example, if the subsequent fine grinding component 3 needs to process "coarse materials with a particle size ≤ 3mm", the aperture of the screening plate 23 is set to 3mm, and the aperture is evenly distributed (3-5 holes per square centimeter) to avoid local material accumulation. The center of the screening plate 23 has a circular through hole that matches the drive shaft 32. Wear-resistant bearings are installed on the inner wall of the through hole. The drive shaft 32 passes through the bearing and forms a rotating connection with the screening plate 23. This does not affect the rotation of the drive shaft 32, and the bearing can reduce the friction loss between the two.

[0034] In embodiment 2, the fine grinding assembly 3 includes a drive shaft 32, a second grinding roller 33, a spiral blade 34, and a connecting block 35. The side of the spiral blade 34 is connected to the inner wall of the first grinding roller 22. The side of the connecting block 35 is connected to the inner wall of the second grinding roller 33. The inner wall of the second grinding roller 33 is slidably connected to the side of the drive shaft 32. A second servo motor 31 is connected to the lower end face of the grinding tank 1. The output end of the second servo motor 31 is connected to one end of the drive shaft 32. An electric telescopic rod 36 is connected to the inner wall of the drive shaft 32. The telescopic end of the electric telescopic rod 36 is connected to the side of the connecting block 35. The side of the connecting block 35 is slidably connected to the inner wall of the drive shaft 32.

[0035] Specifically, the inner wall of the second grinding roller 33 and the side of the drive shaft 32 are in a precision sliding fit with a gap of ≤0.1mm. The connecting block 35 is welded and fixed to the inner wall of the second grinding roller 33 at one end, and inserted into the rectangular groove in the inner wall of the drive shaft 32 at the other end to form a sliding guide structure. When the electric telescopic rod 36 pushes the connecting block 35, the connecting block 35 slides along the rectangular groove to ensure that the second grinding roller 33 moves only along the axial direction of the drive shaft 32, thus ensuring the accuracy of the grinding gap adjustment.

[0036] The electric telescopic rod 36 is fixed to the center of the inner wall of the drive shaft 32 by bolts. Its telescopic end is connected to the center of the connecting block 35 by a pin to ensure uniform transmission of thrust. The stroke range of the electric telescopic rod 36 is set according to the grinding gap requirements (for example, the gap can be adjusted from 0 to 5 mm). It is also equipped with a displacement sensor to provide real-time feedback on the position of the second grinding roller 33. The operator can set the target gap through an external control system (such as a PLC controller), and the electric telescopic rod 36 will automatically complete the adjustment without manual intervention, which is suitable for automated production requirements.

[0037] Working principle:

[0038] First, the operator feeds the mechanical material to be ground into the device through the feed hopper 4 at the top of the grinding tank 1. The material falls naturally under gravity and enters the coarse grinding area inside the grinding tank 1 (the gap between the first grinding roller 22 and the inner wall of the grinding tank 1), preparing for subsequent coarse grinding. Initial crushing and classification are achieved by the rotation of the first grinding roller 22 to achieve coarse grinding of the material, and qualified coarse material is screened through the screening plate 23 and the return channel to complete the screening of qualified coarse material and the return of unqualified material. The specific process is as follows:

[0039] The first servo motor 21 is started, and its output end is connected to the side of the first grinding roller 22 through the inner wall of the grinding tank 1. The first grinding roller 22 is driven to rotate at high speed along the inner wall of the grinding tank 1. When the first grinding roller 22 rotates, it forms a squeezing and shearing force with the inner wall of the grinding tank 1, which initially crushes the falling block and granular materials to form coarsely ground material. The coarsely ground material falls onto the screening plate 23 fixed on the inner wall of the grinding tank 1. The screening plate 23 achieves classification by controlling the aperture (only materials that meet the "coarse grinding qualified standard" are allowed to pass through). Particles smaller than the aperture of the screening plate 23 pass directly through the screening plate 23 and enter the fine grinding area below. Particles larger than the aperture of the screening plate 23 cannot pass through the screening plate 23 and are pushed to the return hole 24 on the side of the first grinding roller 22 by the rotation of the first grinding roller 22. The return hole 24 and the internal space of the first grinding roller 22 together form a return channel. Unqualified coarse material returns to the coarse grinding area of ​​the first grinding roller 22 and the inner wall of the grinding tank 1 through the return channel for coarse grinding again until the particle size meets the screening standard.

[0040] Qualified coarse material passing through the screening plate 23 enters the fine grinding area. Through the fine grinding of the second grinding roller 33, the fineness of the material is improved. At the same time, the grinding gap can be adjusted by the electric telescopic rod 36 to adapt to different needs. The second servo motor 31 is started, and its output end is connected to one end of the drive shaft 32. The spiral blades 34 connected to the side of the drive shaft 32 rotate synchronously with the drive shaft 32. The second grinding roller 33 is associated with the drive shaft 32 through the connecting block 35 (the side of the connecting block 35 is slidably connected to the inner wall of the drive shaft 32, and the inner wall of the second grinding roller 33 is slidably connected to the side of the drive shaft 32). When the drive shaft 32 rotates, it drives the second grinding roller 33 to rotate synchronously. Under the squeezing and grinding action of the second grinding roller 33 and the drive shaft 32, the coarse material is further crushed into fine material.

[0041] If it is necessary to change the fineness of the finished material, it can be adjusted by the electric telescopic rod 36 built into the inner wall of the drive shaft 32. The telescopic end of the electric telescopic rod 36 is connected to the side of the connecting block 35. When telescopic, it pushes the connecting block 35 to slide along the inner wall of the drive shaft 32, thereby driving the second grinding roller 33 to move closer to or away from the drive shaft 32, changing the grinding gap between the two. The smaller the gap, the finer the grinding, and vice versa. This achieves adaptation to the grinding needs of multiple scenarios. The finely ground material (meeting the final fineness standard) continues to move downward and is finally discharged through the discharge hole 5 opened on the lower end face of the grinding tank 1, completing the entire grinding process. At this point, the entire workflow ends.

[0042] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0043] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0045] For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A novel grinding device for machinery, comprising a grinding jar (1), characterized in that: The grinding jar (1) is equipped with a coarse grinding component (2) and a fine grinding component (3). The coarse grinding assembly (2) includes a first grinding roller (22), a screening plate (23) and a reflux hole (24). The side of the first grinding roller (22) is rotatably connected to the inner wall of the grinding tank (1). The side of the screening plate (23) is connected to the inner wall of the grinding tank (1). The reflux hole (24) is opened on the side of the first grinding roller (22). The fine grinding assembly (3) includes a drive shaft (32), a second grinding roller (33), a spiral blade (34), and a connecting block (35). The side of the spiral blade (34) is connected to the inner wall of the first grinding roller (22), the side of the connecting block (35) is connected to the inner wall of the second grinding roller (33), and the inner wall of the second grinding roller (33) is slidably connected to the side of the drive shaft (32).

2. The novel grinding device for machinery according to claim 1, characterized in that: The upper end of the grinding jar (1) is connected to a first servo motor (21), and the output end of the first servo motor (21) passes through the inner wall of the grinding jar (1) and is connected to the side of the first grinding roller (22).

3. The novel grinding device for machinery according to claim 1, characterized in that: The lower end face of the grinding jar (1) is connected to a second servo motor (31), and the output end of the second servo motor (31) is connected to one end of the transmission shaft (32).

4. The novel grinding device for machinery according to claim 1, characterized in that: An electric telescopic rod (36) is connected to the inner wall of the drive shaft (32), and the telescopic end of the electric telescopic rod (36) is connected to the side of the connecting block (35).

5. A novel grinding device for machinery according to claim 1, characterized in that: The side of the connecting block (35) is slidably connected to the inner wall of the drive shaft (32).

6. A novel grinding device for machinery according to claim 1, characterized in that: The side of the drive shaft (32) is rotatably connected to the inner wall of the screening plate (23).

7. A novel grinding device for machinery according to claim 1, characterized in that: The side of the helical blade (34) is connected to the side of the drive shaft (32).

8. A novel grinding device for machinery according to claim 1, characterized in that: The reflux hole (24) and the internal space of the first grinding roller (22) together form a reflux channel.

9. A novel grinding device for machinery according to claim 1, characterized in that: The upper end face of the grinding jar (1) is connected to a feed hopper (4), and the lower end face of the grinding jar (1) is provided with a discharge hole (5).

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