A gap adjustment device for a grinding machine
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU ZILI CHEM MACHINERY
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-24
AI Technical Summary
Existing three-roll mills rely on manual experience to adjust the gap, resulting in insufficient precision, low efficiency, and a lack of real-time monitoring, which affects the stability of product quality.
A gap adjustment device that uses an adjusting cam and an angle sensor in synergy achieves precise and real-time control of the grinding roller gap through a gear transmission group and an angle sensor, and provides data feedback through a display screen.
It enables precise adjustment and dynamic monitoring of the grinding roller gap, improves grinding accuracy and stability, reduces reliance on manual experience, and ensures product quality stability.
Smart Images
Figure CN224541818U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grinding and processing, specifically to a gap adjustment device for a grinding machine. Background Technology
[0002] The three-roll mill, a key piece of equipment in modern precision manufacturing, utilizes three horizontally arranged rollers rotating at different speeds to achieve ultra-fine grinding of materials. Its working principle employs a progressive grinding method: the material is first initially crushed between the rear and middle rollers, then enters the nanoscale gap between the middle and front rollers to undergo high-intensity shearing, and finally is collected by a scraper into ultra-fine particles at the micron or even nanometer scale.
[0003] However, significant shortcomings remain in the critical gap control aspect of existing technologies. Traditional three-roll mills rely primarily on manual adjustment by operators using feeler gauges, a method that is not only inefficient but also fails to guarantee the stability of micron-level gaps. Furthermore, the lack of real-time monitoring during operation prevents timely detection of deviations from set gap values, severely impacting product quality stability. This technological bottleneck hinders the intelligent development of three-roll mills, necessitating the development of novel systems capable of dynamic gap monitoring to improve equipment performance and meet the higher demands of modern precision manufacturing for machining accuracy and stability. Utility Model Content
[0004] To address the issues of insufficient precision and low efficiency caused by the reliance on manual experience to adjust the gap in traditional three-roll mills, this invention proposes a gap adjustment device for mills. By coordinating the adjustment cam and angle sensor, it achieves precise and real-time control of the gap between the milling rollers, thereby improving the stability of the milling process and product quality.
[0005] The main technical solution adopted in this utility model is as follows:
[0006] A gap adjustment device for a grinding mill includes at least one set of gap adjustment mechanisms. Each set of gap adjustment mechanisms is respectively disposed on the roller shaft of a feed roller or a discharge roller. Each set of gap adjustment mechanisms includes two adjustment plates, an adjustment rod, two adjustment cams, two sets of elastic elements, a gear transmission assembly, and an angle sensor. The two adjustment plates are mounted on both ends of the roller shaft via bearings, and the upper ends of the adjustment plates are rotatably mounted on the side plate of the frame. The adjustment plates rotate around a rotation connection point. The lower ends of the adjustment plates are connected to the side plate of the frame via elastic elements. The adjustment rod is rotatably mounted between the two side plates of the frame. The two adjustment cams are respectively fixedly mounted on both ends of the adjustment rod, and the outer peripheral surface of the adjustment cams always maintains contact with the side edge of the adjustment plate. The gear transmission assembly is mounted on one side plate of the frame, and the input end of the gear transmission assembly is coaxially driven and mounted with the adjustment cams. The angle sensor is coaxially mounted with the output end of the gear transmission assembly for monitoring the adjustment angle.
[0007] Preferably, the gear transmission assembly includes a first gear and a second gear, wherein the first gear is coaxially mounted on the adjusting rod with the adjusting cam, the angle sensor is coaxially mounted on the side plate of the frame with the second gear, and the first gear and the second gear mesh with each other for transmission.
[0008] Preferably, the adjusting cam is an involute cam, whose outer radius gradually increases in the same direction.
[0009] Preferably, the outer peripheral surface of the adjusting cam is designed with a limiting end face, which cooperates with the side of the adjusting plate to limit the rotation angle of the adjusting cam.
[0010] Preferably, an adjusting bolt is provided through the side of the adjusting plate, and one end of the adjusting bolt abuts against the outer peripheral surface of the adjusting cam.
[0011] Preferably, it also includes a display screen disposed on the housing, the display screen being connected to the angle sensor data and used to display the monitoring data of the angle sensor.
[0012] Preferably, a rotary handwheel is installed at one end of the adjusting rod for rotating the adjusting rod.
[0013] Preferably, the elastic element is a tension spring.
[0014] Beneficial effects: This utility model provides a gap adjustment device for a grinding machine, which has the following advantages:
[0015] (1) This utility model uses the adjustment cam and the adjustment plate to adjust the gap between the two rollers, and uses an angle sensor to monitor and provide feedback on the gap adjustment in real time, which reduces the dependence on manual experience and realizes the precise adjustment and dynamic monitoring of the gap between the two rollers, which is conducive to improving the grinding accuracy and stability.
[0016] (2) This utility model utilizes the adjusting bolts on the adjusting plate and the adjusting cam to pre-adjust the initial state between the two rollers, eliminating the problem of unbalanced initial gap between the two rollers caused by processing or assembly errors, which is beneficial to improving grinding accuracy and running stability. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention. Figure I ;
[0019] Figure 3 This is a schematic diagram of the internal structure of the present invention. Figure II ;
[0020] Figure 4 This is a partial structural schematic diagram of the present invention;
[0021] In the diagram: 1. Adjusting plate, 1-1. Adjusting bolt, 1-2. Rotating connection point, 2. Adjusting rod, 2-1. Handwheel, 3. Adjusting cam, 3-1. Limiting end face, 4. Elastic element, 5. Gear transmission group, 5-1. First gear, 5-2. Second gear, 5-2. Angle sensor, 6. Roller shaft, 7. Frame side plate, 8. Display screen, 9. Housing, 10. Feed roller, 11. Middle roller, 12. Discharge roller, 13. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The description of the specific embodiments below is merely exemplary and should be understood as being used only to explain the present utility model, and not in any way to limit the present utility model or its application or usage.
[0023] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly on" another element, there is no intervening element. Conversely, when an element is said to be "directly" connected to another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0024] In the description of this utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "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 utility model 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 limitations on this utility model. Example 1
[0025] like Figure 1-4 As shown, a gap adjustment device for a grinding mill includes two sets of gap adjustment mechanisms, each set of gap adjustment mechanisms being respectively installed on the roller shaft 7 of the feed roller 11 and / or the discharge roller 13.
[0026] Taking the adjustment of the gap between the discharge roller 13 and the middle roller 12 as an example, the specific structure and assembly of the gap adjustment mechanism are explained. Each set of the gap adjustment mechanism includes two adjustment plates 1, an adjustment rod 2, two adjustment cams 3, two sets of elastic elements 4, a gear transmission group 5, an angle sensor 6, and a display screen 9. The two adjustment plates 1 are mounted on both ends of the roller shaft 7 via bearings, with the upper end of each adjustment plate 1 rotatably mounted on the side plate 8 of the frame. The adjustment plates 1 rotate around the rotation connection point 1-2. The lower end of each adjustment plate 1 is connected to the side plate 8 of the frame via the elastic element 4. The adjustment rod 2 is rotatably mounted between the two side plates 8 of the frame. The two adjustment cams 3 are respectively fixedly mounted on both ends of the adjustment rod 2, and the outer circumferential surface of each adjustment cam 3 always maintains contact with the side of the adjustment plate 1. The gear transmission group 5 is mounted on one side of the side plate 8 of the frame, and the input end of the gear transmission group 5 is coaxially driven by the adjustment cam 3. The angle sensor 6 is coaxially mounted with the output end of the gear transmission group 5 and is used to monitor the adjustment angle. The display screen 9 is mounted on the housing 10 and is data-connected to the angle sensor 6 to display the monitoring data of the angle sensor 6.
[0027] In this embodiment 1, the gear transmission assembly 5 includes a first gear 5-1 and a second gear 5-2. The first gear 5-1 is coaxially mounted on the adjusting rod 2 with the adjusting cam 3, and the angle sensor 6 is coaxially mounted on the side plate 8 of the frame with the second gear 5-2. The first gear 5-1 and the second gear 5-2 mesh with each other for transmission. In this invention, the angle sensor 6 detects the rotation angle of the second gear 5-2 and outputs an electrical signal corresponding to the change in roller gap in real time, which is transmitted to the display screen 9 to realize the digital display of the gap value, avoiding the reading error of traditional mechanical rulers.
[0028] In this invention, the adjusting cam 3 is an involute cam, with its outer circumferential radius gradually increasing in the same direction. To limit the rotation angle of the adjusting cam 3, a limiting end face 3-1 is designed on its outer circumferential surface to cooperate with the side of the adjusting plate 1 and limit the rotation angle. In this invention, the outer circumferential profile of the adjusting cam 3 can be designed according to actual needs. In this embodiment 1, the adjusting cam 3 is preferably an involute profile because the radius of curvature of the involute profile changes uniformly with the angle, ensuring that the normal force direction of the adjusting bolt 1-1 and the cam contact point remains consistent. Combined with the constant tension of the tension spring 4, this eliminates sudden pressure changes during adjustment, avoids vibration or impact, and ensures the smoothness of the grinding roller gap adjustment. Furthermore, existing cams with a linear relationship between lift and rotation angle are also applicable to this invention.
[0029] To eliminate the imbalance in the gap between the two ends of the discharge roller 13 and the middle roller 12 caused by processing or assembly errors, thereby improving grinding accuracy and operational stability, this invention incorporates an adjusting bolt 1-1 running through the side of the adjusting plate 1, ensuring its end abuts against the outer circumferential surface of the adjusting cam 3. Before gap adjustment, operators can fine-tune the initial gap between the two ends of the discharge roller 13 by rotating the adjusting bolts 1-1 on both sides, achieving a balanced gap with the middle roller 12. This structural design effectively solves the problem of inconsistent gaps caused by assembly errors or long-term wear, ensuring the stability of the grinding process and improving processing accuracy.
[0030] In this embodiment 1, a rotating handwheel 2-1 is installed at one end of the adjusting rod 2 for rotating the adjusting rod. In this invention, the driving mechanism of the adjusting rod 2 can be, but is not limited to, rotating the handwheel 2-1; any existing manual or automatic driving mechanism that can satisfy the rotational driving requirement is applicable.
[0031] In this embodiment 1, the elastic element 4 is preferably a tension spring, which provides unidirectional tension to the adjusting plate 1, ensuring that the adjusting plate always remains in contact with the adjusting cam 3. The tension spring can complement the involute profile of the adjusting cam 3. The cam profile determines the displacement, while the tension spring ensures the stability of the profile contact. Together, they achieve the accuracy and repeatability of the gap adjustment, ensuring the reliable operation of the mechanical adjusting mechanism.
[0032] The working principle of this utility model is as follows:
[0033] Initial state adjustment: In the initial state of the equipment, the adjusting cam 3 is in the reference position (for example, the adjusting bolt 1-1 of the adjusting plate 1 is in contact with the minimum radius of the adjusting cam 3). The operator can pre-adjust the discharge roller 13 by rotating the adjusting bolts 1-1 on both sides to ensure the initial balance of the gap at both ends of the roller. This step effectively eliminates the influence of assembly errors on the grinding accuracy.
[0034] Gap adjustment process: When the handwheel 2-1 is turned to drive the adjusting rod 2 to rotate, the adjusting cams 3 at both ends rotate synchronously. Due to the continuous tension of the tension spring 4, the adjusting bolt 1-1 of the adjusting plate 1 is always tightly attached to the outer circumference of the adjusting cam 3. As the radius of the adjusting cam 3 gradually increases, the adjusting plate 1 rotates around the rotating connection point 1-2, thereby driving the discharge roller 13 to move away from the middle roller 12, achieving precise adjustment of the gap between the two rollers.
[0035] Real-time gap monitoring: The rotational motion of the adjusting rod 2 is transmitted to the angle sensor 6 via the gear transmission group 5. Specifically, the first gear 5-1, fixed to the adjusting rod 2, drives the second gear 5-2 to rotate, causing the coaxially mounted angle sensor 6 to detect changes in rotation angle in real time. The control system converts the angle signal into a gap value and displays it intuitively on the display screen 9, enabling the operator to accurately grasp the adjustment status and quickly reach the preset gap value.
[0036] In this invention, converting the angle change information detected by the angle sensor 6 into the displacement change information between the two rollers (for example, using a PLC control module to convert the angle into displacement or gap value based on the characteristics of the cam profile (such as linear relationship)) is a conventional technical means, and therefore is not described in detail.
[0037] In this invention, a gap adjustment mechanism can be provided on the discharge roller and / or the feed roller according to actual needs.
[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A gap adjustment device for a grinding mill, comprising at least one set of gap adjustment mechanisms, each set of gap adjustment mechanisms being respectively disposed on the roller shaft of a feed roller or a discharge roller, characterized in that, Each set of the gap adjustment mechanism includes two adjustment plates, an adjustment rod, two adjustment cams, two sets of elastic elements, a gear transmission assembly, and an angle sensor. The two adjustment plates are mounted on both ends of the roller shaft via bearings, with the upper ends of the adjustment plates rotatably mounted on the side plate of the frame. The adjustment plates rotate around a rotation connection point. The lower ends of the adjustment plates are connected to the side plate of the frame via elastic elements. The adjustment rod is rotatably mounted between the two side plates of the frame. The two adjustment cams are fixedly mounted on both ends of the adjustment rod, and the outer circumferential surfaces of the adjustment cams always maintain contact with the sides of the adjustment plates. The gear transmission assembly is mounted on one side of the frame, with its input end coaxially driven by the adjustment cams. The angle sensor is coaxially mounted with the output end of the gear transmission assembly and is used to monitor the adjustment angle.
2. The gap adjustment device for a grinding machine according to claim 1, characterized in that, The gear transmission assembly includes a first gear and a second gear. The first gear is coaxially mounted on the adjusting rod with the adjusting cam, and the angle sensor is coaxially mounted on the side plate of the frame with the second gear. The first gear and the second gear mesh with each other for transmission.
3. The gap adjustment device for a grinding machine according to claim 1, characterized in that, The adjusting cam is an involute cam, whose outer radius gradually increases in the same direction.
4. The gap adjustment device for a grinding machine according to claim 1, characterized in that, The outer circumferential surface of the adjusting cam is designed with a limiting end face, which cooperates with the side of the adjusting plate to limit the rotation angle of the adjusting cam.
5. The gap adjustment device for a grinding machine according to claim 1, characterized in that, An adjusting bolt is provided through the side of the adjusting plate, and one end of the adjusting bolt abuts against the outer peripheral surface of the adjusting cam.
6. The gap adjustment device for a grinding machine according to claim 1, characterized in that, It also includes a display screen, which is mounted on the housing and is connected to the angle sensor data to display the monitoring data of the angle sensor.
7. The gap adjustment device for a grinding machine according to claim 1, characterized in that, A rotating handwheel is installed at one end of the adjusting rod for rotating the adjusting rod.
8. The gap adjustment device for a grinding machine according to claim 1, characterized in that, The elastic element is a tension spring.