Turnover device capable of adjusting pressure of machine head of floor machine and pressure control method

Abstract

According to the turnover device capable of adjusting the pressure of the machine head of the floor machine and the pressure control method of the turnover device, in the device, the extension rod of the linear driving module is rigidly connected with the pressure adjusting rod of the elastic pressure adjusting module, and double springs with different rigidities are matched, so that the pressure of the machine head can be flexibly adjusted, and various floor treatment requirements are met; the shaft pin weighing sensor accurately detects the pressure of the machine head through a stable structure and feeds back the pressure, and a basis is provided for adjustment of the central control unit. The machine head roll-over stand is hinged to the elastic pressure regulating module shell, so that the flexibility of the machine head is improved; according to the pressure control method, in the pressure adjusting stage, the central control unit accurately adjusts the pressure by means of real-time feedback of a sensor in combination with a positive pressure mode, a negative pressure mode and a PID (Proportion Integration Differentiation) algorithm; in the lifting execution stage, the lifting angle is limited; the target pressure calculation formula is scientific and reasonable, a reliable scheme is provided for efficient, accurate, stable and diversified pressure control of the floor machine, and the floor processing quality and effect are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of floor machines, and in particular relates to a turning device with adjustable pressure on the head of a floor machine and a pressure control method. Background Art

[0002] In the field of large-scale floor grinding equipment, the technical limitations of traditional head pressure regulating devices have long restricted operating efficiency and construction quality, specifically manifested in the following core issues:

[0003] Rigid pressure regulation mechanisms: Existing technologies generally use mechanical counterweight adjustment or rigid connection structures, requiring pressure adjustment to be manually added or removed after the machine is shut down. This offline adjustment method frequently interrupts the work process, with a single adjustment taking up to 30 minutes or more. This significantly reduces overall construction efficiency, especially in complex working conditions requiring multi-level pressure switching.

[0004] Lack of quantitative pressure control: Traditional equipment lacks real-time pressure monitoring and display systems, leaving operators to estimate grinding pressure based on experience. Due to the lack of precise quantitative feedback, actual pressure fluctuations often exceed 20% of the rated value, leading to significant deviations in key indicators such as floor surface flatness and gloss.

[0005] Inadequate impact resistance and buffering capacity: Rigid transmission systems lack effective flexible buffering mechanisms when responding to ground bumps or instantaneous overloads, which can easily cause deformation of machine head components or drive mechanism overload protection shutdown. Although some equipment uses a single-stage spring buffer design, it is difficult to simultaneously meet the combined needs of small load precision adjustment (such as in polishing processes) and large load impact absorption (such as in rough grinding processes).

[0006] Poor environmental adaptability: Dust generated by grinding operations can easily infiltrate transmission components, causing problems such as spring jamming and sensor signal drift. Traditional open-type structural designs expose core components to high-dust environments for extended periods, shortening the equipment's mean time between failures and significantly increasing maintenance frequency.

[0007] Single functional mode: Existing equipment usually only supports a single positive pressure working mode. When the process requirements switch from rough grinding to polishing and other processes, the machine must be shut down to adjust the mechanical structure or replace accessories, which seriously restricts the continuity of construction. In particular, the efficiency loss is particularly prominent in multi-process complex operation scenarios.

[0008] To overcome these technical bottlenecks, the present invention proposes a tilting device with adjustable pressure on the floor grinding machine head. Through the collaborative innovation of a dual-spring graded pressure-regulating mechanism, a closed-loop force feedback control system, and a mechanical hard-limit protection device, this device achieves precise dynamic adjustment and real-time visual control of grinding pressure. This device integrates positive and negative pressure dual-mode switching and a fully sealed protective structure, significantly improving the equipment's adaptability to complex working conditions while reducing energy consumption and maintenance costs, providing a highly efficient and reliable solution for the floor grinding industry. Summary of the Invention

[0009] In view of the problems existing in the prior art, the present invention provides a turning device with adjustable pressure on the head of a floor machine and a pressure control method.

[0010] The present invention is implemented as follows: a flipping device with adjustable pressure of the head of a floor machine, characterized in that it includes: a frame; a linear drive module, whose shell is hinged to the frame and is provided with an extension rod that can move linearly; an elastic pressure regulating module, comprising a shell and a pressure regulating rod slidably arranged inside the shell, and the pressure regulating rod is rigidly connected to the extension rod; a first spring and a second spring, respectively sleeved on the front and rear ends of the pressure regulating rod, and accommodated in the shell of the elastic pressure regulating module; a head flipping frame, hinged to the shell of the elastic pressure regulating module; an axle pin weighing sensor, coaxially passing through the head flipping frame and the head connecting piece, for detecting the pressure on the head; a central control unit, receiving the signal of the axle pin weighing sensor and controlling the movement of the extension rod; an extension limit block, fixed to the frame; wherein when the extension rod is extended to the limit position, the extension limit block abuts the shell of the elastic pressure regulating module to form a mechanical hard connection.

[0011] Further preferably, the machine head connecting piece locks the axle pin weighing sensor through a sensor fixing plate, one end of the sensor fixing plate is fixed to the machine head connecting piece, and the other end is clamped to the detection end of the axle pin weighing sensor.

[0012] Further preferably, the elastic voltage regulating module housing is a sealed dustproof structure.

[0013] Further preferably, the first spring and the second spring have different stiffness coefficients, and the first spring has a stiffness greater than that of the second spring.

[0014] Further preferably, the linear drive module is an electric push rod or a hydraulic cylinder, and a position sensor is provided at the end of its stroke.

[0015] A method for controlling the pressure of a flip device with adjustable pressure on the head of a floor machine comprises: a pressure adjustment stage: a central control unit controls the telescopic movement of an extension rod, feeds back the pressure value in real time through an axle pin weighing sensor, and dynamically adjusts it to a target pressure, which is the target pressure value F for grinding the ground; a lifting execution stage: when the extension rod is extended to the extreme position, the extension limit block abuts against the elastic pressure regulating module shell to form a mechanical hard connection, and the drive device rotates and lifts around the hinge point.

[0016] Further preferably, the pressure regulation stage includes a positive pressure mode and a negative pressure mode: in positive pressure mode: the extending rod contracts and compresses the first spring, thereby increasing the pressure of the machine head on the ground; in negative pressure mode: the extending rod extends and compresses the second spring, thereby reducing the pressure of the machine head on the ground.

[0017] Further preferably, the central control unit adopts a PID algorithm to adjust the movement speed of the extension rod in real time according to the deviation between the pressure feedback value and the target pressure value F.

[0018] Further preferably, during the lifting execution phase, the nose lifting angle satisfies: 0°≤θ≤75°.

[0019] Further preferably, the target pressure is calculated as follows:

[0020] F=F2+M

[0021] F2=F1×L1 / L2

[0022] F=(F1×L1 / L2)+M

[0023] Where F is the target pressure value F of the grinding pressure on the ground, F1 is the force applied by the pressure regulating rod, L1 / L2 is the lever arm ratio, F2 is the vertical pressure acting on the machine head; M is the weight of the machine head.

[0024] The advantages and technical effects of the present invention are as follows: the turning device with adjustable pressure on the head of a floor machine and the pressure control method thereof of the present invention have excellent overall technical effects.

[0025] In terms of the device structure, the extension rod of the linear drive module is rigidly connected to the pressure regulating rod of the elastic pressure regulating module. Combined with dual springs of different stiffness, the machine head pressure can be flexibly adjusted according to different working conditions to meet diverse floor treatment needs such as rough grinding and polishing. The axle pin weighing sensor can accurately detect the machine head pressure and provide feedback through a stable sensor fixing plate connection structure, providing a reliable basis for the precise adjustment of the central control unit. The machine head flip frame is hinged to the elastic pressure regulating module housing, which improves the flexibility of the machine head. The sealed and dustproof elastic pressure regulating module housing effectively protects the internal components, reduces wear and tear, and extends the service life. The extension limit block forms a mechanical hard connection when the extension rod is extended to the limit, ensuring the safe and stable operation of the device.

[0026] Regarding pressure control, during the pressure regulation phase, the central control unit leverages real-time sensor feedback to dynamically and precisely adjust pressure to the target pressure value F. The application of positive and negative pressure modes and a PID algorithm further enhances the precision and response speed of pressure regulation. During the lift execution phase, the machine head lift angle is limited to ensure a safe, stable, and user-friendly lift process. The target pressure calculation formula is scientifically sound, integrating multiple factors to provide a reliable solution for efficient, precise, stable, and diverse pressure control for flooring machines, significantly improving the quality and effectiveness of floor treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : Schematic diagram of the structure of the present invention;

[0028] Figure 2 : Schematic diagram of the installation structure of the axle pin weighing sensor;

[0029] Figure 3 : Logic control diagram;

[0030] Figure 4 : Force analysis diagram of the nose tilt frame;

[0031] Figure 5 : Force analysis diagram of the flip frame when the nose is subjected to negative pressure;

[0032] Figure 6 : Force analysis diagram of the flip frame when the nose is subjected to positive pressure;

[0033] Figure 7 : Spring state when the machine head is not under pressure;

[0034] Figure 8 : The movement direction of the extension rod of the linear drive module and the force state of the spring when the machine head is subjected to positive pressure;

[0035] Figure 9 : The movement direction of the extension rod of the linear drive module and the force state of the spring when the machine head is subjected to negative pressure;

[0036] Figure 10 : The state of the machine head when it is flipped up and the state of extending the limit block.

[0037] 1. Housing of linear drive module; 2. Extension rod of linear drive module; 3. Housing of elastic pressure regulating module; 4. Pressure regulating rod of elastic pressure regulating module; 5. First spring; 6. Second spring; 7. Machine head flip frame; 8. Frame; 9. Extension limit block; 10. Axle pin weighing sensor; 11. Machine head connector; 12. Central control unit; 13. Machine head; 14. Gasket; 15. Sensor fixing plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] See also Figure 1 and Figure 2 , a turning device with adjustable pressure of the head of a floor machine, comprising: a frame 8; a linear drive module, whose shell 1 is hinged to the frame 8 and is provided with a protruding rod 2 that can move linearly; an elastic pressure regulating module, comprising a shell 3 and a pressure regulating rod 4 slidably arranged inside the shell, the pressure regulating rod 4 being rigidly connected to the protruding rod 2; a first spring 5 and a second spring 6, respectively sleeved on the front and rear ends of the pressure regulating rod 4, and accommodated in the shell 3 of the elastic pressure regulating module; a head turning frame 7, hinged to the shell 3 of the elastic pressure regulating module; an axle pin weighing sensor 10, coaxially penetrating the head turning frame 7 and the head connecting piece 11, for detecting the pressure on the head 13, please refer to Figure 4 and Figure 7 ; The central control unit 12 receives the signal of the axle pin weighing sensor 10 and controls the movement of the extension rod 2; the extension limit block 9 is fixed to the frame 8; when the extension rod 2 is extended to the limit position, the extension limit block 9 abuts against the elastic pressure regulating module shell 3 to form a mechanical hard connection.

[0040] The technical effect of the flip device with adjustable head pressure of this floor machine is remarkable. The extension rod of the linear drive module is rigidly connected to the pressure regulating rod of the elastic pressure regulating module. Combined with the double spring design, the head pressure can be flexibly adjusted to meet different floor treatment needs. The axle pin weighing sensor can detect the head pressure in real time and feed it back to the central control unit to achieve precise pressure control. The head flip frame is hinged to the shell of the elastic pressure regulating module, making the head more flexible. The extension limit block forms a mechanical hard connection when the extension rod is extended to the limit, providing reliable protection for the device, preventing overload damage, ensuring the safety and stability of the device operation, and improving the quality of floor treatment.

[0041] Further preferably, the machine head connector 11 locks the axle pin weighing sensor 10 through the sensor fixing plate 15. One end of the sensor fixing plate 15 is fixed to the machine head connector 11, and the other end is clamped to the detection end of the axle pin weighing sensor 10. A gasket 14 is provided between the machine head connector 11 and the machine head flip frame. This ensures the stability of the connection; the other end is clamped to the sensor detection end, which can accurately transmit the pressure exerted on the machine head 13. This structure makes pressure detection more accurate and reliable, effectively avoids measurement errors caused by loose connections, and provides an accurate basis for the central control unit 12 to accurately adjust the machine head pressure.

[0042] Further preferably, the elastic voltage regulating module housing 3 is a sealed dustproof structure, which effectively blocks the entry of dust and debris, protects internal springs and components such as the voltage regulating rod 4, reduces wear and failure, extends the service life of the device, and reduces maintenance costs.

[0043] Further preferably, the first spring 5 and the second spring 6 have different stiffness coefficients, and the first spring 5 has a stiffness greater than that of the second spring 6 .

[0044] This differentiated design provides more flexible and precise control over the pressure adjustment of the floor machine head. When working on harder surfaces or performing operations such as rough grinding that require greater pressure, the first spring 5, with its greater rigidity, can better withstand and transmit the greater force, ensuring that the machine head applies sufficient pressure to the ground for efficient operation. When working on softer surfaces or performing operations such as fine polishing that require less pressure, the second spring 6, with its lower rigidity, comes into play, fine-tuning the pressure through minor deformations to avoid excessive pressure that could damage the ground or affect processing quality. This design enables the device to adapt to a variety of ground surfaces with different characteristics, broadening its scope of application and improving operational adaptability and flexibility.

[0045] Preferably, the linear drive module is an electric push rod or hydraulic cylinder equipped with a position sensor at its end of travel, precisely controlling the position of the extension rod 2. The position sensor provides real-time feedback on the rod's travel, allowing the central control unit 12 to precisely adjust the rod's movement accordingly, ensuring that the machine head pressure remains constant at the set value. Furthermore, during the lift phase, the position sensor accurately determines whether the rod has reached its limit position, ensuring safe operation of the device and preventing component damage due to over-extension, thereby improving the device's reliability and stability.

[0046] On the basis of the above technical solutions, the following technical solutions can also be given priority:

[0047] Further preferably, the connecting end of the pressure regulating rod and the extension rod of the linear drive module is provided with a threaded hole or a threaded connection column, and the end of the extension rod is correspondingly provided with a threaded connection column or a threaded hole. This design realizes the rapid disassembly and reliable connection of the pressure regulating rod and the linear drive module through the complementary cooperation of the threaded hole and the threaded connection column. The threaded connection has a self-locking characteristic, which can effectively prevent loosening under vibration conditions and ensure the stability of pressure transmission. At the same time, the standardized threaded interface supports the rapid adaptation of pressure regulating rods of different specifications, improves the adaptability of the module to multi-material ground, and reduces maintenance costs. In addition, the threaded connection structure is simple, the manufacturing cost is low, and disassembly and assembly can be completed without additional tools, which significantly improves the convenience of on-site operation.

[0048] Further preferably, a countersunk hole is provided in the center of the flip limit block, and the extension rod is inserted into the countersunk hole and connected by a fixing pin. The countersunk hole structure expands the contact area between the flip limit block and the extension rod, cooperates with the fixing pin to achieve axial fixation, and significantly improves the impact resistance of the connection part. Under high-frequency vibration or impact loads, the combined design of the countersunk hole and the fixing pin can effectively disperse stress and avoid connection failure. At the same time, the structure has high assembly accuracy, which ensures the smoothness of the pressure regulation process and reduces equipment jitter caused by eccentric loads. In addition, the countersunk hole design facilitates processing and testing, reduces manufacturing costs, and improves production efficiency.

[0049] Furthermore, the bottom of the countersunk hole is connected to the pressure-regulating rod via a fastening bolt. This bolt secures the pressure-regulating rod to the bottom of the countersunk hole, creating a secondary load-bearing structure that effectively disperses axial forces and avoids localized stress concentration. This design significantly improves the fatigue life of the connection and reduces the risk of fracture due to long-term use. Furthermore, the secondary connection structure allows for the independent replacement of the pressure-regulating rod or the stop block, reducing maintenance costs and improving the maintainability of the module.

[0050] Pressure control method: This pressure control method includes: pressure adjustment stage: the central control unit 12 controls the extension and retraction movement of the extension rod 2, and the pressure value is fed back in real time by the axle pin load cell 10, and is dynamically adjusted to the target pressure value F, which is the target pressure value F for grinding the ground; lifting execution stage: when the extension rod 2 is extended to the limit position, the extension limit block 9 abuts against the elastic pressure regulating module housing 3 to form a mechanical hard connection, and the driving device rotates around the hinge point to lift, please refer to Figure 10 .

[0051] Further preferably, the pressure regulation stage includes a positive pressure mode and a negative pressure mode: in positive pressure mode: the extending rod 2 contracts and compresses the first spring 5, thereby increasing the pressure of the machine head 13 on the ground; in negative pressure mode: the extending rod 2 extends and compresses the second spring 6, thereby reducing the pressure of the machine head 13 on the ground.

[0052] Further preferably, the central control unit 12 adopts a PID algorithm to adjust the movement speed of the extension rod 2 in real time according to the deviation between the pressure feedback value ΔP and the target pressure value FF.

[0053] Further preferably, during the lifting execution phase, the lifting angle θ of the nose 13 satisfies: 0°≤θ≤75°.

[0054] Further preferably, the calculation formula of the target pressure value F is:

[0055] F=F2+M

[0056] F2=F1×L1 / L2

[0057] F=(F1×L1 / L2)+M

[0058] Where F is the target pressure value F of the grinding pressure on the ground, F1 is the force applied by the pressure regulating rod 4, L1 / L2 is the arm ratio, F2 is the vertical pressure acting on the head; M is the weight of the head 13, please refer to Figure 4 .

[0059] The working status is described in conjunction with the relevant drawings:

[0060] like Figure 6 and Figure 8 If a positive pressure F2' is to be added to the machine head, the central control unit 12 controls the linear drive module to extend the rod (2) to contract, the first spring 5 is compressed, and at the same time the axle pin weighing sensor (10) measures the pressure in real time and feeds it back to the central control unit (12) until the force reaches F2', and the central control unit (12) controls the linear drive module to extend the rod (2) to stop.

[0061] like Figure 5 and Figure 9 If a negative pressure F2" is to be added to the machine head, the central control unit (12) controls the linear drive module to extend the extension rod (2), the second spring 6 is compressed, and at the same time the axle pin weighing sensor (10) measures the pressure in real time and feeds it back to the central control unit (12) until the force reaches F2", and the central control unit (12) controls the linear drive module to extend the extension rod (2) to stop.

[0062] like Figure 10 When the machine head needs to be tilted up, the linear drive module extension rod (2) is extended, the second spring 6 is continuously compressed, and the extended limit block 9 contacts the elastic pressure regulating module housing (3), thereby generating a hard connection and lifting the machine head.

[0063] This pressure control method has outstanding technical effects. During the pressure adjustment stage, the central control unit uses the axle pin weighing sensor to feedback the pressure value in real time, and can dynamically and accurately adjust the pressure to the target pressure value F to ensure stable floor treatment pressure. The setting of positive and negative pressure modes can flexibly increase or decrease the pressure of the machine head on the ground by compressing different springs through different movements of the extension rod, meeting the diverse needs of operations such as rough grinding and polishing. The PID algorithm is used to adjust the movement speed of the extension rod in real time according to the pressure feedback deviation, further improving the accuracy and response speed of pressure regulation. During the lifting execution stage, the extension limit block forms a mechanical hard-connected drive device to lift, and the lifting angle of the machine head is limited to 0°-75°, which not only ensures the safety and stability of the lifting process, but also facilitates operation. The target pressure calculation formula comprehensively considers the force of the pressure regulating rod, the arm ratio and the deadweight of the machine head, making the pressure setting more scientific and reasonable, and providing a reliable solution for the floor machine to achieve efficient, accurate, stable and diversified pressure control.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A turning device with adjustable pressure on the head of a floor machine, characterized in that: include: Frame (8); A linear drive module, wherein the housing (1) is hinged to the frame (8) and is provided with an extension rod (2) capable of linear motion; An elastic pressure regulating module comprises a housing (3) and a pressure regulating rod (4) slidably arranged inside the housing, wherein the pressure regulating rod (4) is rigidly connected to the extension rod (2); A first spring (5) and a second spring (6) are respectively sleeved on the front end and the rear end of the pressure regulating rod (4), and are accommodated in the elastic pressure regulating module housing (3); The machine head turning frame (7) is hinged to the elastic pressure regulating module housing (3); A shaft pin weighing sensor (10) coaxially passes through the machine head turning frame (7) and the machine head connecting piece (11) and is used to detect the pressure applied to the machine head (13); A central control unit (12) receives a signal from the axle pin weighing sensor (10) and controls the movement of the extension rod (2); The extension limit block (9) is fixed to the frame (8); when the extension rod (2) is extended to the limit position, the extension limit block (9) abuts against the elastic pressure regulating module housing (3) to form a mechanical hard connection.

2. The turning device with adjustable pressure on the head of the floor machine according to claim 1 is characterized in that: The machine head connecting piece (11) locks the shaft pin weighing sensor (10) through the sensor fixing plate (15); one end of the sensor fixing plate (15) is fixed to the machine head connecting piece (11), and the other end is clamped to the detection end of the shaft pin weighing sensor (10).

3. The turning device with adjustable pressure on the head of the floor machine according to claim 1 is characterized in that: The elastic pressure regulating module housing (3) is a sealed dustproof structure.

4. The turning device with adjustable pressure on the head of the floor machine according to claim 1 is characterized in that: The first spring (5) and the second spring (6) have different stiffness coefficients, and the stiffness of the first spring (5) is greater than that of the second spring (6).

5. The turning device with adjustable pressure on the head of the floor machine according to claim 1 is characterized in that: The linear drive module is an electric push rod or a hydraulic cylinder, and a position sensor is provided at the end of its stroke.

6. A pressure control method for a turning device with adjustable head pressure of a floor machine according to any one of claims 1 to 5, characterized in that include: Pressure regulation stage: The central control unit (12) controls the telescopic movement of the extension rod (2), and feeds back the pressure value in real time through the axle pin weighing sensor (10), and dynamically adjusts it to the target pressure value F, where F is the target pressure value F for grinding the ground; Lifting execution stage: when the extension rod (2) is extended to the limit position, the extension limit block (9) abuts against the elastic pressure regulating module housing (3) to form a mechanical hard connection, and the driving device rotates around the hinge point to lift.

7. The pressure control method according to claim 6, characterized in that: The pressure regulation stage includes positive pressure mode and negative pressure mode: Positive pressure mode: the extended rod (2) contracts and compresses the first spring (5), thereby increasing the pressure of the machine head (13) against the ground; Negative pressure mode: the extension rod (2) extends to compress the second spring (6), thereby reducing the pressure of the machine head (13) on the ground.

8. The pressure control method according to claim 7, wherein: The central control unit (12) uses a PID algorithm to adjust the movement speed of the extension rod (2) in real time according to the deviation between the pressure feedback value ΔP and the target pressure value F.

9. The pressure control method according to claim 6, wherein: During the lifting execution phase, the lifting angle θ of the nose (13) satisfies: 0°≤θ≤75°.

10. The method according to claim 6, wherein: The calculation formula of the target pressure value F is: F=F2+M F2=F1×L1 / L2 F=(F1×L1 / L2)+M Wherein F is the target pressure value F of the grinding pressure on the ground, F1 is the force applied by the pressure regulating rod (4), L1 / L2 is the lever arm ratio, F2 is the vertical pressure acting on the machine head; and M is the deadweight of the machine head (13).

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