Automatic lift-off system and method for a grinding head

Abstract

This invention discloses an automatic grinding head lifting system and method, belonging to the field of floor grinding construction technology. A rotating rocker is rotatably mounted on a frame; the grinding head is located at the second end of the rotating rocker; a drive mechanism is located below the frame, and its output end is connected to the first end of the rotating rocker. The drive mechanism can drive the rotating rocker to rotate relative to the frame, thereby raising or lowering the grinding head; a current detection module is used to detect the current of the drive motor inside the grinding head; a control module is electrically connected to the current detection module and the drive mechanism. The control module controls the action of the drive mechanism based on the current value detected by the current detection module. When the current value reaches a current threshold, the control module controls the drive mechanism to raise the grinding head. This invention has the advantages of improving the automation level of grinding operations, grinding quality, and equipment operational reliability.

Description

Technical Field

[0001] This invention relates to the field of floor grinding construction technology, and in particular to an automatic grinding head lifting system and method. Background Technology

[0002] As a crucial and highly efficient piece of equipment in the field of floor treatment, floor grinding machines excel in grinding, polishing, and removing old coatings from various floor surfaces such as concrete, stone, and epoxy flooring, striving to create ideal floor finishes for users. The grinding head, as the core component of this equipment, directly determines the grinding effect, work efficiency, and overall performance of the machine, making its importance self-evident.

[0003] In traditional floor grinders, the raising and lowering of the grinding head and its adjustment are mostly done manually. Operators need to manually adjust the position of the grinding head according to the hardness of the floor and the grinding requirements. However, this method is not only time-consuming and labor-intensive, but also makes it difficult to ensure consistent grinding results. Furthermore, there are certain safety hazards during manual adjustment of the grinding head height; improper operation can easily damage the grinding head, leading to uneven grinding and other problems, seriously affecting the normal use of the equipment and the grinding quality.

[0004] With the continuous development of technology, some floor grinders have begun to incorporate simple automatic control devices to achieve the raising and lowering of the grinding head. For example, the grinding head lifting device for a floor grinder with patent publication number CN218364023U uses a cylinder drive to control the raising and lowering of the grinding head, which facilitates the replacement of grinding discs to some extent. However, this device still has many shortcomings, as it cannot automatically adjust the height of the grinding head according to the actual load of the grinding motor. When the grinding head contacts a hard surface, such as hard particles in concrete or high-hardness areas in stone, the grinding head needs more force to overcome the resistance of the surface. This causes the motor to generate more torque to maintain the normal operation of the grinding head, thus increasing the motor load. Conversely, when the grinding head encounters a soft surface, the pressure applied by the grinding head will cause the surface material to deform and compress, resulting in a sudden increase in the contact area and friction between the grinding head and the surface. This drastic load change makes it difficult for the motor to adapt, greatly increasing the risk of overload. At the same time, when the resistance of the grinding head increases, the motor needs to generate more torque to overcome the resistance, which leads to an increase in current. If the current exceeds the motor's power supply capacity, the motor will be overloaded and damaged, posing a significant threat to the normal use of the equipment.

[0005] Traditional motor overload protection devices, such as thermal relays and fuses, typically cut off the power supply directly when an overload is detected, stopping the motor. While this method can effectively protect the motor to some extent and prevent damage from overload, it causes the equipment to completely stop working. At this point, manual inspection and reset are required before the equipment can be restarted, which not only significantly increases downtime but also raises maintenance costs, causing considerable inconvenience to users. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic grinding head lifting system and method, which detects the current of the drive motor inside the grinding head and controls the grinding head to lift automatically according to the current, thereby improving the automation level of grinding operations, grinding quality and equipment operation reliability.

[0007] In a first aspect, the present invention provides an automatic grinding head lifting system, comprising: frame; A rotating rocker is rotatably mounted on the frame. The first end of the rotating rocker is located below the frame, and the second end of the rotating rocker is exposed outside the frame. The grinding head is located at the second end of the rotating rocker. A drive mechanism is located below the frame, and the output end of the drive mechanism is connected to the first end of the rotating rocker. The drive mechanism can drive the rotating rocker to rotate relative to the frame, thereby raising or lowering the grinding head. A current detection module is used to detect the current of the drive motor inside the grinding head; The control module is electrically connected to the current detection module and the drive mechanism. The control module controls the action of the drive mechanism according to the current value detected by the current detection module. When the current value reaches the current threshold, the control module controls the drive mechanism to drive the grinding head to rise.

[0008] The automatic grinding head lifting system provided by this invention monitors the current value of the drive motor inside the grinding head in real time through a current detection module, and the control module automatically controls the raising and lowering of the grinding head based on the current value, realizing automated and intelligent adjustment of the grinding head height. When the motor current reaches the overload threshold, the grinding head is quickly raised to lift it off the ground, thereby reducing the motor load. The motor can continue to run without stopping, greatly reducing downtime caused by overload and improving the continuous operating efficiency of the equipment.

[0009] Furthermore, motor overload often occurs when the grinding head encounters a surface that is too hard or too soft, resulting in excessive resistance. If the machine is stopped abruptly at this point, the grinding head may be damaged due to the sudden high resistance, or uneven grinding may have already occurred before the machine stops. Automatically raising the grinding head can promptly reduce its load, preventing damage due to excessive resistance. Simultaneously, because the motor can continue running, the grinding head can quickly return to normal operating conditions after being raised, reducing uneven grinding.

[0010] Furthermore, it also includes a ground hardness detection module for detecting the hardness of the ground; a storage module for storing current threshold ranges corresponding to different ground hardnesses; and a processing module for searching for the corresponding current threshold range from the storage module based on the ground hardness value detected by the ground hardness detection module, and setting the current threshold within that range.

[0011] By employing the above technical solution and introducing a ground hardness detection and storage module, the automatic grinding head lifting system can automatically adjust the current threshold according to the ground hardness. This adaptive function ensures that the grinding head maintains optimal grinding pressure on surfaces of varying hardness (such as concrete, stone, and epoxy flooring). For example, on harder surfaces, the system automatically increases the current threshold, allowing the grinding head to provide sufficient pressure for effective grinding; while on softer surfaces, the system decreases the current threshold, thereby reducing the pressure applied by the grinding head and preventing excessive pressure that could damage the surface or cause wear to the grinding head. This not only improves the uniformity and consistency of the grinding effect but also reduces uneven grinding caused by differences in ground hardness.

[0012] Furthermore, the rotating rocker includes an integrally formed first rotating rocker, a second rotating rocker, and a V-shaped connecting portion. The first rotating rocker is located below the frame, and the second rotating rocker is exposed outside the frame. The first rotating rocker and the second rotating rocker are respectively located at opposite ends of the V-shaped connecting portion. The V-shaped connecting portion is rotatably connected to the frame, and the V-shaped opening of the V-shaped connecting portion faces downward.

[0013] The V-shaped rocker, employing the aforementioned technical solution, comprises a first rotating rocker, a second rotating rocker, and a V-shaped connecting part, with its rotation point located at the V-shaped connecting part. This design utilizes the lever principle, allowing the drive mechanism to achieve a significant lifting motion of the grinding head on the second rotating rocker by only slightly displacing the first rotating rocker, through the fulcrum effect of the V-shaped connecting part. In actual floor grinding processes, the hardness and resistance of the ground may frequently change. The V-shaped rocker structure enables the grinding head to quickly adapt to these dynamic changes, maintaining optimal grinding conditions at all times. This adaptive capability not only improves the uniformity and consistency of the grinding effect but also enhances the reliability and stability of the equipment under complex working conditions.

[0014] Furthermore, the end of the frame facing the grinding head is provided with a connecting plate, and the distance from the connecting plate to the ground increases from the side closer to the frame to the side farther away from the frame. The end of the connecting plate away from the frame is rotatably connected to the V-shaped connecting part.

[0015] By employing the above technical solution, and placing the hinge point at the end of the connecting plate furthest from the frame, the force transmission path and structural layout are cleverly altered, thereby reducing the space requirement of the V-shaped rocker under the frame. This design makes the entire system more compact and improves the operational flexibility of the equipment within limited spaces.

[0016] Furthermore, it also includes a mounting ramp, with mounting ramps provided on both sides of the frame. The mounting ramps extend in a direction inclined to the horizontal plane. The two ends of the mounting ramp are respectively located in the mounting ramps. The drive mechanism is fixedly located on the side of the mounting ramp facing the first rotating rocker.

[0017] By adopting the above technical solution, the design of the inclined plate allows the output end of the drive mechanism to be tilted, ensuring that the direction of the driving force of the drive mechanism is nearly perpendicular to the lever arm of the first rotating rocker. This near-vertical force transmission direction minimizes force loss and ensures that the driving force is efficiently transmitted to the V-shaped rocker. According to the lever principle, the force transmission efficiency is highest when the direction of the driving force is perpendicular to the lever arm. This allows the drive mechanism to lift the grinding head with minimal output force, significantly improving transmission efficiency. Furthermore, this tilted arrangement effectively utilizes the space under the frame, reducing the space occupied by the drive mechanism in the vertical direction. This not only makes the entire automatic grinding head lifting system more compact but also improves the operational flexibility of the equipment within a limited space.

[0018] Furthermore, there are two rotating rockers, which are respectively located on opposite sides of the frame. A connecting rod is provided between the two rotating rockers, and the connecting rod abuts against the output end of the drive mechanism.

[0019] The above-described technical solution utilizes a two-rotating-rocker design, enabling more precise control over the grinding head's position. Connected by a connecting rod, the two rockers move synchronously, ensuring the grinding head remains in the optimal working position throughout its raising and lowering process. This precise control significantly improves the uniformity and consistency of the grinding effect, especially when treating floor joints, edges, or uneven areas.

[0020] Furthermore, the driving mechanism includes a driving cylinder, a first rod, and a second rod. The first rod is movably disposed within the driving cylinder, and the second rod is integrally formed with the first rod. The length extension direction of the second rod is perpendicular to the length extension direction of the first rod, and the second rod is used to abut against the connecting round rod.

[0021] By employing the above technical solution, the perpendicularity of the second rod to the first rod ensures that the second rod maintains effective contact with the connecting rod throughout the rotation of the first rotating rocker. This design guarantees that the second rod will remain in contact with the connecting rod regardless of the angle to which the first rotating rocker rotates, thus achieving stable force transmission. This all-angle force transmission capability significantly improves the stability and reliability of the system, especially under complex operating conditions involving frequent adjustments to the grinding head position.

[0022] Furthermore, the number of the driving mechanisms is at least two, and the at least two driving mechanisms are spaced apart along the length extension direction of the connecting rod, and the output ends of the at least two driving mechanisms can drive the connecting rod simultaneously.

[0023] By adopting the above technical solution, at least two drive mechanisms are set and spaced apart along the length of the connecting rod. This design significantly enhances the driving force of the system, making the lifting and lowering of the grinding head smoother and more reliable. The simultaneous operation of multiple drive mechanisms provides greater driving force, ensuring uniform force distribution on the grinding head during lifting and lowering, and reducing the risk of failure due to overload of a single drive mechanism.

[0024] Secondly, the present invention provides an automatic grinding head lifting method, employing any of the aforementioned automatic grinding head lifting systems, the method comprising the following steps: The current of the drive motor inside the grinding head is detected using a current detection module; The drive mechanism is controlled based on the current value detected by the current detection module. When the current value reaches the current threshold, the drive mechanism is controlled by the control module to lift the grinding head.

[0025] Furthermore, the method further includes the following steps: The hardness of the ground is detected using a ground hardness detection module; Based on the ground hardness value detected by the ground hardness detection module, the corresponding current threshold range is retrieved from the storage module, and the current threshold is set within this range; the storage module stores current threshold ranges corresponding to different ground hardnesses.

[0026] As can be seen from the above, the automatic grinding head lifting system provided by this invention monitors the current value of the drive motor inside the grinding head in real time through a current detection module, and the control module automatically controls the lifting and lowering of the grinding head according to the current value, realizing automated and intelligent adjustment of the grinding head height. When the motor current reaches the overload threshold, the grinding head is quickly lifted to remove it from the ground, thereby reducing the motor load. At this time, the motor can continue to run without stopping, greatly reducing the downtime caused by overload and improving the continuous operation efficiency of the equipment.

[0027] Furthermore, motor overload often occurs when the grinding head encounters a surface that is too hard or too soft, resulting in excessive resistance. If the machine is stopped abruptly at this point, the grinding head may be damaged due to the sudden high resistance, or uneven grinding may have already occurred before the machine stops. Automatically raising the grinding head can promptly reduce its load, preventing damage due to excessive resistance. Simultaneously, because the motor can continue running, the grinding head can quickly return to normal operating conditions after being raised, reducing uneven grinding.

[0028] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an automatic grinding head lifting system proposed in this invention.

[0030] Figure 2 This is an exploded top view of an automatic grinding head lifting system proposed in this invention.

[0031] Figure 3 This is a block diagram of an automatic grinding head lifting system proposed in this invention.

[0032] Figure 4 This is a block diagram of another embodiment of the automatic lifting system for grinding heads proposed in this invention.

[0033] Figure 5 for Figure 1 A schematic diagram of the connection structure when the grinding head is in a flat position.

[0034] Figure 6 for Figure 5 A schematic diagram of the connection structure when the grinding head is in a raised state.

[0035] Figure 7 for Figure 1 Top view of the connection structure between the central drive mechanism and the rotating rocker.

[0036] In the attached diagram: 100, frame; 110, connecting plate; 120, mounting ramp; 130, mounting ramp hole; 140, mounting bracket; 141, fixing hole; 200, rotating rocker; 210, first rotating rocker; 220, second rotating rocker; 230, V-shaped connector; 240, connecting rod; 300, grinding head; 400, drive mechanism; 410, drive cylinder; 420, first rod; 430, second rod; 500, current detection module; 600, control module; 700, ground hardness detection module; 800, storage module; 900, processing module. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0039] The automatic grinding head lifting system disclosed in this invention is mainly used in floor grinding machines for grinding, polishing, and removing old coatings on various surfaces such as concrete, stone, and epoxy flooring. The automatic grinding head lifting system detects the current of the drive motor inside the grinding head and controls the grinding head to lift automatically according to the current, thereby improving the automation level of grinding operations, grinding quality, and equipment operation reliability.

[0040] Reference Appendix Figure 1 Appendix Figure 2 Appendix Figure 3In one embodiment, the automatic grinding head lifting system includes a frame 100, a rotating rocker 200, a grinding head 300, a drive mechanism 400, a current detection module 500, and a control module 600. A rotating rocker 200 is rotatably mounted on a frame 100. The first end of the rotating rocker 200 is located below the frame 100, and the second end of the rotating rocker 200 is exposed above the frame 100. A grinding head 300 is located at the second end of the rotating rocker 200. A drive mechanism 400 is located below the frame 100, and the output end of the drive mechanism 400 is connected to the first end of the rotating rocker 200. The drive mechanism 400 can drive the rotating rocker 200 to rotate relative to the frame 100, thereby raising or lowering the grinding head 300. A current detection module 500 is used to detect the current of the drive motor inside the grinding head 300. A control module 600 is electrically connected to the current detection module 500 and the drive mechanism 400. The control module 600 controls the action of the drive mechanism 400 according to the current value detected by the current detection module 500. When the current value reaches the current threshold, the control module 600 controls the drive mechanism 400 to raise the grinding head 300.

[0041] Specifically, the rated current of the drive motor can be 10A, meaning that under normal operating conditions, the motor current should not exceed 10A. To protect the motor, a safe current range is typically set, generally 80% to 100% of the rated current. For example, for a motor with a rated current of 10A, the current threshold range can be set from 8A to 10A. If the current reaches 8A, the control module 600 can issue an alarm to alert the operator; if the current reaches 10A, the control module 600 immediately triggers the grinding head 300 to lift, preventing motor overload.

[0042] As can be seen from the above, the automatic grinding head lifting system provided by this invention monitors the current value of the drive motor inside the grinding head 300 in real time through the current detection module 500, and the control module 600 automatically controls the lifting and lowering of the grinding head 300 according to the current value, realizing the automated and intelligent adjustment of the height of the grinding head 300. When the motor current is detected to reach the overload threshold, the grinding head 300 is quickly lifted, causing the grinding head 300 to leave the ground, thereby reducing the motor load. At this time, the motor can continue to run without stopping, greatly reducing the downtime caused by overload and improving the continuous operation efficiency of the equipment.

[0043] Furthermore, when the motor is overloaded, it is often because the grinding head 300 encounters a surface that is too hard or too soft, resulting in excessive resistance. If the machine is stopped abruptly at this point, the grinding head 300 may be damaged due to the instantaneous high resistance, or uneven grinding may have already occurred before the machine stops. Automatically raising the grinding head 300 can promptly reduce its load, preventing damage due to excessive resistance. Simultaneously, because the motor can continue to run, the grinding head 300 can quickly return to normal operating conditions after being raised, reducing uneven grinding.

[0044] For hard surfaces, the high grinding resistance significantly increases the motor current. Using a fixed current threshold might cause the motor to trigger the lifting mechanism during normal operation, affecting grinding efficiency. Therefore, the current threshold needs to be increased to accommodate larger loads and avoid frequent false triggers. For soft surfaces, the grinding resistance is low, and the motor current is relatively low. Using an excessively high current threshold makes soft surfaces more prone to deformation during grinding. When the grinding head 300 applies excessive pressure, the surface material may be overcompressed or deformed, causing a sudden increase in surface resistance. This could prevent the motor from triggering its protection mechanism in time under overload, potentially damaging the motor or grinding head 300. Therefore, the current threshold needs to be lowered to ensure the motor can lift the grinding head 300 promptly under overload conditions, preventing damage.

[0045] Different surface hardness requires different grinding pressures and speeds. By adjusting the current threshold, the raising and lowering of the grinding head 300 can be better controlled, thereby optimizing the grinding effect and improving grinding quality and efficiency.

[0046] Therefore, please refer to the appendix. Figure 4 In one embodiment, the system further includes a ground hardness detection module 700 for detecting the hardness of the ground; a storage module 800 for storing current threshold ranges corresponding to different ground hardnesses; and a processing module 900 for searching for the corresponding current threshold range from the storage module 800 based on the ground hardness value detected by the ground hardness detection module 700, and setting the current threshold within that range.

[0047] Specifically, the ground hardness detection module 700 can employ a piezoelectric sensor or strain gauge sensor, mounted on the grinding disc or grinding machine base, to monitor pressure changes in real time during the grinding process. When the grinding disc contacts the ground, the sensor unit monitors the pressure changes between the grinding disc and the ground in real time. Simultaneously, based on a pre-determined experimental model of the relationship between pressure and ground hardness, the collected pressure data is converted into hardness values. For example, by conducting pressure tests on surfaces with different known hardnesses, a mapping relationship between pressure and hardness is established, thereby determining the real-time hardness of the ground.

[0048] The 700 floor hardness detection module can also employ acoustic sensors. These sensors are installed at appropriate locations on the grinding disc or body of the floor grinder to capture sound signals generated during the grinding process. When the grinder is started, the acoustic sensors collect the sound signals generated during grinding. These signals include friction noise and vibration noise produced when the grinding disc contacts the floor. The collected sound signals are then processed using spectral analysis and time-domain analysis. Different floor hardness levels produce different sound signal characteristics during grinding; for example, harder floors may produce sound signals with higher frequencies and smaller amplitudes. Based on the characteristic parameters of the sound signals and a pre-established relationship model between sound signals and hardness, the real-time hardness of the floor is determined.

[0049] When a hard surface (such as concrete or granite) is detected, the motor current will increase significantly due to the greater grinding resistance. The current threshold can be set between 90% and 100% of the rated current. For example, for a motor with a rated current of 10A, the current threshold can be set between 9A and 10A. If the detected current reaches 9A, the control module 600 can issue an alarm to alert the operator; if the current reaches 10A, the control module 600 will immediately trigger the grinding head 300 to lift, preventing motor overload.

[0050] When the ground surface is detected to be soft (such as wood or soft epoxy flooring), the grinding resistance is low, and the current threshold can be set between 50% and 60% of the rated current. For example, for a motor with a rated current of 10A, the current threshold can be set between 5A and 6A. If the detected current reaches 5A, the control module 600 can issue an alarm to alert the operator; if the current reaches 6A, the control module 600 immediately triggers the grinding head 300 to lift, preventing motor overload.

[0051] By adopting the above technical solution and introducing a ground hardness detection module 700 and a storage module 800, the automatic lifting system for the grinding head can automatically adjust the current threshold according to the ground hardness. This adaptive function ensures that the grinding head 300 maintains optimal grinding pressure on surfaces of varying hardness (such as concrete, stone, epoxy flooring, etc.). For example, on harder surfaces, the system automatically increases the current threshold, allowing the grinding head 300 to provide sufficient pressure for effective grinding; while on softer surfaces, the system decreases the current threshold, thereby reducing the pressure exerted by the grinding head 300 on the ground and preventing excessive pressure from damaging the ground or causing wear to the grinding head 300. This not only improves the uniformity and consistency of the grinding effect but also reduces uneven grinding caused by differences in ground hardness.

[0052] Reference Appendix Figure 5 Appendix Figure 6In one embodiment, the rotating rocker 200 includes an integrally formed first rotating rocker 210, a second rotating rocker 220, and a V-shaped connecting portion 230. The first rotating rocker 210 is located below the frame 100, and the second rotating rocker 220 is exposed outside the frame 100. The first rotating rocker 210 and the second rotating rocker 220 are respectively located at opposite ends of the V-shaped connecting portion 230. The V-shaped connecting portion 230 is rotatably connected to the frame 100, and the V-shaped opening of the V-shaped connecting portion 230 is set downward.

[0053] The V-shaped rocker arm, employing the aforementioned technical solution, comprises a first rotating rocker arm 210, a second rotating rocker arm 220, and a V-shaped connecting portion 230, with its rotation point located at the V-shaped connecting portion 230. This design utilizes the lever principle, allowing the drive mechanism 400 to achieve a significant lifting motion by driving the grinding head 300 on the second rotating rocker arm 220 through the fulcrum effect of the V-shaped connecting portion 230, requiring only a small displacement of the first rotating rocker arm 210. In actual floor grinding processes, the hardness and resistance of the ground may change frequently. The V-shaped rocker arm structure enables the grinding head 300 to quickly adapt to these dynamic changes, maintaining optimal grinding conditions at all times. This adaptive capability not only improves the uniformity and consistency of the grinding effect but also enhances the reliability and stability of the equipment under complex working conditions.

[0054] Due to its structural characteristics, the V-shaped rocker typically requires a large space below the frame 100 to allow for its rotation and the raising and lowering of the grinding head 300. However, this space requirement can limit the overall design and applicability of the equipment, especially in construction environments with limited space. Therefore, in one embodiment, a connecting plate 110 is provided at the end of the frame 100 facing the grinding head 300. The distance from the connecting plate 110 to the ground increases progressively from near the frame 100 to far away from the frame 100. The end of the connecting plate 110 away from the frame 100 is rotatably connected to the V-shaped connecting portion 230.

[0055] Specifically, the frame 100 is also provided with a mounting bracket 140, which has a fixing hole 141 for the drive cylinder 410 to pass through.

[0056] By adopting the above technical solution, and setting the hinge point at the end of the connecting plate 110 away from the frame 100, the force transmission path and structural layout are cleverly changed, thereby reducing the space requirement of the V-shaped rocker under the frame 100. This design makes the entire system more compact and improves the operational flexibility of the equipment in a limited space.

[0057] Continue to refer to the appendix Figure 2In one embodiment, the mounting ramp 120 is also included. Mounting ramps 130 are provided on both sides of the frame 100. The extension direction of the mounting ramps 130 is inclined to the horizontal plane. The two ends of the mounting ramp 120 are respectively provided in the mounting ramps 130. The drive mechanism 400 is fixedly provided on the side of the mounting ramp 120 facing the first rotating rocker 210.

[0058] By adopting the above technical solution, the design of the mounting ramp 120 allows the output end of the drive mechanism 400 to be tilted, thereby ensuring that the driving force direction of the drive mechanism 400 is nearly perpendicular to the lever arm of the first rotating rocker 210. This near-vertical force transmission direction minimizes force loss and ensures that the driving force is efficiently transmitted to the V-shaped rocker. According to the lever principle, the force transmission efficiency is highest when the driving force direction is perpendicular to the lever arm. This allows the drive mechanism 400 to lift the grinding head 300 with minimal output force, significantly improving transmission efficiency. Furthermore, this tilted setting effectively utilizes the space under the frame 100, reducing the space occupied by the drive mechanism 400 in the vertical direction. This not only makes the structure of the entire automatic lifting system for the grinding head 300 more compact but also improves the operational flexibility of the equipment within a limited space.

[0059] Reference Appendix Figure 5 , attached Figure 6 , attached Figure 7 In one embodiment, there are two rotating rockers 200, which are respectively located on opposite sides of the frame 100. A connecting rod 240 is provided between the two rotating rockers 200, and the connecting rod 240 abuts against the output end of the drive mechanism 400.

[0060] By employing the above technical solution, the design of the two rotating rockers 200 allows for more precise control of the position of the grinding head 300. Through the connection of the connecting rod 240, the two rotating rockers 200 can move synchronously, ensuring that the grinding head 300 remains in the optimal working position during lifting and lowering. This precise control significantly improves the uniformity and consistency of the grinding effect, especially when dealing with floor joints, edges, or uneven areas.

[0061] In one embodiment, the drive mechanism 400 includes a drive cylinder 410, a first rod 420 and a second rod 430. The first rod 420 is movably disposed in the drive cylinder 410. The second rod 430 is integrally formed with the first rod 420, and the length extension direction of the second rod 430 is perpendicular to the length extension direction of the first rod 420. The second rod 430 is used to abut against the connecting round rod 240.

[0062] By adopting the above technical solution, the arrangement of the second rod 430 perpendicular to the first rod 420 ensures that the second rod 430 maintains effective contact with the connecting rod 240 throughout the rotation of the first rotating rocker 210. This design guarantees that the second rod 430 will always be in contact with the connecting rod 240, regardless of the angle to which the first rotating rocker 210 rotates, thus achieving stable force transmission. This all-angle force transmission capability significantly improves the stability and reliability of the system, especially under complex operating conditions where the position of the grinding head 300 needs frequent adjustment.

[0063] In one embodiment, the number of drive mechanisms 400 is at least two, and the at least two drive mechanisms 400 are spaced apart along the length extension direction of the connecting rod 240, and the output ends of the at least two drive mechanisms 400 can drive the connecting rod 240 simultaneously.

[0064] By adopting the above technical solution, at least two drive mechanisms 400 are set and spaced apart along the length extension direction of the connecting rod 240. This design significantly enhances the driving force of the system, making the lifting and lowering action of the grinding head 300 smoother and more reliable. The simultaneous operation of multiple drive mechanisms 400 provides greater driving force, ensuring uniform force distribution on the grinding head 300 during lifting and lowering, and reducing the risk of failure due to overload of a single drive mechanism 400.

[0065] The present invention also provides an automatic grinding head lifting method, employing any of the above-mentioned automatic grinding head lifting systems, the method comprising the following steps: The current of the drive motor inside the grinding head 300 is detected using the current detection module 500; The drive mechanism 400 is controlled based on the current value detected by the current detection module 500. When the current value reaches the current threshold, the drive mechanism 400 is controlled by the control module 600 to drive the grinding head 300 to rise.

[0066] In one embodiment, the method further includes the following steps: The hardness of the ground is detected using a ground hardness testing module 700; Based on the ground hardness value detected by the ground hardness detection module 700, the corresponding current threshold range is retrieved from the storage module 800, and the current threshold is set within this range; the storage module 800 stores the current threshold ranges corresponding to different ground hardnesses.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An automatic grinding head lifting system, characterized in that, include: Rack (100); A rotating rocker (200) is rotatably mounted on the frame (100). The first end of the rotating rocker (200) is located below the frame (100), and the second end of the rotating rocker (200) is exposed outside the frame (100). A grinding head (300) is disposed at the second end of the rotating rocker (200); A drive mechanism (400) is located below the frame (100), and the output end of the drive mechanism (400) is connected to the first end of the rotating rocker (200). The drive mechanism (400) can drive the rotating rocker (200) to rotate relative to the frame (100) so as to drive the grinding head (300) to rise or fall. A current detection module (500) is used to detect the current of the drive motor inside the grinding head (300); The control module (600) is electrically connected to the current detection module (500) and the drive mechanism (400). The control module (600) controls the operation of the drive mechanism (400) according to the current value detected by the current detection module (500). When the current value reaches the current threshold, the control module (600) controls the drive mechanism (400) to drive the grinding head (300) to lift.

2. The automatic grinding head lifting system according to claim 1, characterized in that, It also includes a ground hardness detection module (700) for detecting the hardness of the ground; a storage module (800) for storing current threshold ranges corresponding to different ground hardnesses; and a processing module (900) for searching for the corresponding current threshold range from the storage module (800) based on the ground hardness value detected by the ground hardness detection module (700) and setting the current threshold within that range.

3. The automatic grinding head lifting system according to claim 1, characterized in that, The rotating rocker (200) includes an integrally formed first rotating rocker (210), a second rotating rocker (220), and a V-shaped connecting part (230). The first rotating rocker (210) is located below the frame (100), and the second rotating rocker (220) is exposed outside the frame (100). The first rotating rocker (210) and the second rotating rocker (220) are respectively located at opposite ends of the V-shaped connecting part (230). The V-shaped connecting part (230) is rotatably connected to the frame (100), and the V-shaped opening of the V-shaped connecting part (230) is set downward.

4. The automatic grinding head lifting system according to claim 3, characterized in that, The frame (100) is also provided with a connecting plate (110) at one end facing the grinding head (300). The distance from the connecting plate (110) to the ground increases from the side closer to the frame (100) to the side farther away from the frame (100). The end of the connecting plate (110) away from the frame (100) is rotatably connected to the V-shaped connecting part (230).

5. The automatic grinding head lifting system according to claim 3, characterized in that, It also includes a mounting ramp (120), and mounting ramps (130) are provided on both sides of the frame (100). The mounting ramps (130) are inclined to the horizontal plane in the extension direction. The two ends of the mounting ramp (120) are respectively located in the mounting ramps (130). The drive mechanism (400) is fixedly located on the side of the mounting ramp (120) facing the first rotating rocker (210).

6. The automatic grinding head lifting system according to claim 1, characterized in that, There are two rotating rockers (200), which are respectively located on opposite sides of the frame (100). A connecting rod (240) is provided between the two rotating rockers (200), and the connecting rod (240) abuts against the output end of the drive mechanism (400).

7. The automatic grinding head lifting system according to claim 6, characterized in that, The drive mechanism (400) includes a drive cylinder (410), a first rod (420), and a second rod (430). The first rod (420) is movably disposed within the drive cylinder (410). The second rod (430) is integrally formed with the first rod (420), and the length extension direction of the second rod (430) is perpendicular to the length extension direction of the first rod (420). The second rod (430) is used to abut against the connecting round rod (240).

8. The automatic grinding head lifting system according to claim 6, characterized in that, The number of the driving mechanism (400) is at least two, and the at least two driving mechanisms (400) are spaced apart along the length extension direction of the connecting rod (240), and the output ends of the at least two driving mechanisms (400) can drive the connecting rod (240) simultaneously.

9. A method for automatically lifting a grinding head, characterized in that, The automatic grinding head lifting system according to any one of claims 1-8, the method comprising the following steps: The current of the drive motor inside the grinding head (300) is detected using a current detection module (500); The drive mechanism (400) is controlled to operate according to the current value detected by the current detection module (500). When the current value reaches the current threshold, the drive mechanism (400) is controlled by the control module (600) to drive the grinding head (300) to lift.

10. The method for automatically lifting a grinding head according to claim 9, characterized in that, The method further includes the following steps: The hardness of the ground is detected using a ground hardness testing module (700); Based on the ground hardness value detected by the ground hardness detection module (700), the corresponding current threshold range is searched from the storage module (800), and the current threshold is set within this range; the storage module (800) stores the current threshold ranges corresponding to different ground hardness.

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