Flexible screw-down mechanism of angle grinder and grinding head

Abstract

The invention discloses a flexible screw-down mechanism of an angle grinder, which belongs to the technical field of polishing and cleaning, is used for implementing flexible screw-down on the angle grinder so as to be tightly attached to and adapted to the surface of a treated object, and comprises a vertical frame, a U-shaped supporting plate, a triangular groove frame, an H-shaped binary arm, an adjustable damping spring and a connecting plate, and the vertical frame is connected with the U-shaped supporting plate so as to clamp the angle grinder; the triangular groove frame is hinged to the U-shaped supporting plate through a fourth hinge shaft. The H-shaped two-fork arm is hinged with the two vertical frames through a third hinge shaft; the connecting plate is rotationally arranged on the second hinge shaft, and the two ends of the adjustable damping spring are hinged to the fifth hinge shaft and the connecting plate respectively. By means of the flexible pressing mechanism, the angle grinder with the grinding head can adapt to the surface of a steel formwork with reasonable pressure and elasticity, and accurate pressure application can be conducted according to the requirement of the grinding degree in combination with an adjustable damping spring, so that the operation efficiency and the grinding quality are improved. The invention further discloses a grinding head adopting the flexible screw-down mechanism of the angle grinder.

Description

Technical Field

[0001] The present invention belongs to the technical field of grinding and cleaning, and provides a flexible pressing mechanism for a angle grinder and a grinding head, which are particularly suitable for the automated grinding and cleaning operation of large engineering steel formwork. Background Art

[0002] In modern infrastructure construction, as a key process equipment for the formation of reinforced concrete structures, the annual usage of steel formwork has long exceeded hundreds of millions of square meters. However, in the pretreatment process of steel formwork, especially in the grinding and cleaning process, it is mainly manually operated by skilled workers using angle grinders, resulting in a processing time of 4 - 6 man-hours or even longer for a single set of standard formwork. It can be seen that the traditional manual operation mode of the steel formwork surface treatment process has exposed many technical bottlenecks: 1) In terms of time-consuming and laborious, due to the low automation level and large amount of grinding and cleaning, multiple workers need to be equipped for continuous construction, resulting in low grinding efficiency. 2) In terms of quality stability, the fluctuation range of the surface roughness value of manual grinding is large, far higher than the standard range that can be controlled by automated equipment, directly affecting the appearance quality of concrete components. Even the rework rate of components due to improper formwork treatment is relatively high. 3) In terms of operation safety, when operating on vertical formwork such as bridge piers (with a height generally exceeding 8m), workers need to perform high-altitude grinding operations on mobile scaffolds, which is prone to the risk of falling accidents. 4) In terms of occupational health, long-term exposure to grinding dust and the high-frequency vibration environment of angle grinders, the incidence rates of pneumoconiosis and arm vibration syndrome among employees are higher than the industry average level, directly affecting employee occupational health and labor shortages. In addition, a robot is an intelligent machine that can work semi-autonomously or fully autonomously. It can execute tasks through programming and automatic control to run along a fixed motion trajectory during the grinding process. Therefore, it is urgent to develop a special grinding head with a flexible actuator based on a robot to reduce the disadvantages brought by manual grinding. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a flexible pressing mechanism for an angle grinder and a grinding head, aiming to adapt to the grinding and cleaning of the steel formwork surface with reasonable pressure and elasticity.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides a flexible down-pressure mechanism for a angle grinder. The flexible down-pressure mechanism is used to perform flexible down-pressure on the angle grinder to closely adhere to and adapt to the surface of the object to be processed, and includes an upright frame, a U-shaped support plate, a triangular groove frame, an H-shaped two-arm, an adjustable shock-absorbing spring and a connecting plate. Among them, the upright frame is used to connect to the angle grinder, the U-shaped support plate is used to support the angle grinder, and the upright frame is connected to the U-shaped support plate to clamp the angle grinder; the three angular ends of the triangular groove frame are respectively provided with a first hinge shaft, a fourth hinge shaft and a fifth hinge shaft; the triangular groove frame is hinge-connected to the U-shaped support plate through the fourth hinge shaft; the two ends of the H-shaped two-arm are respectively provided with a second hinge shaft and a third hinge shaft; the H-shaped two-arm is hinge-connected to the two upright frames through the third hinge shaft; the connecting plate is rotatably arranged on the second hinge shaft, and the two ends of the adjustable shock-absorbing spring are respectively hinge-connected to the fifth hinge shaft and the connecting plate.

[0006] Optionally, the upright frame, the U-shaped support plate, the triangular groove frame, the H-shaped two-arm and the connecting plate are all made of sheet metal parts, and a hollow first weight-reducing hole is opened on the triangular groove frame, and a hollow second weight-reducing hole is opened on the H-shaped two-arm. In this way, through reasonable structural design and material selection, the light weight, strength optimization and shock-absorbing effect of the equipment are realized, meeting the requirements in practical applications.

[0007] Optionally, the upright frame includes triangular plates symmetrically fixed on both sides of the angle grinder and a square tube connecting the two triangular plates; each of the two wings of the U-shaped support plate is provided with a connecting ear; both ends of the square tube respectively extend out of their respective triangular plates and are connected to the connecting ears of the U-shaped support plate through a bolt assembly.

[0008] Optionally, the connecting plate is arranged in two pieces side by side, and a pin shaft for rotatably connecting the adjustable shock-absorbing spring is arranged between the two connecting plates, and a fixing plate is arranged at the bottom of the distal ends of the two connecting plates away from the pin shaft.

[0009] Optionally, it further includes a bracket. The first hinge shaft and the second hinge shaft of the flexible down-pressure mechanism are respectively rotatably connected to the bracket, and the fixing plate of the flexible down-pressure mechanism is fixedly connected to the bracket.

[0010] The present invention also provides a grinding head applied with the above flexible down-pressure mechanism of the angle grinder. A plurality of flexible down-pressure mechanisms arranged in a single row side by side or in two rows offset are connected to the bracket. The bracket is composed of a vertical frame, triangular braces, and hinge plates. On one side of the vertical frame, at least two triangular braces arranged side by side at intervals are provided. At the upper part of the vertical frame, there is a hinge plate for connecting the H-shaped bifurcated arm. The H-shaped bifurcated arm of a single flexible down-pressure mechanism corresponds to two hinge plates, and second mounting holes connected to the second hinge shaft are provided on the two hinge plates; at the top of the vertical frame, there is a third mounting hole for fixedly connecting with the fixing plate; at the lower part of the vertical frame, there is a first mounting hole for connecting with the first hinge shaft of the triangular groove frame. In this way, through this structural design, the bracket not only provides the necessary physical support, but also ensures the efficient operation and stability of the flexible down-pressure mechanism through reasonable arrangement and connection methods, meeting the requirements in practical applications.

[0011] Optionally, the bracket further includes a cushion rod for the elongation of the front-row flexible down-pressure mechanism in the two-row offset arrangement, and a first mounting hole for connecting with the first hinge shaft of the triangular groove frame of the front-row flexible down-pressure mechanism is provided at the lower part of the cushion rod; the triangular groove frame, H-shaped bifurcated arm, connecting plate, and hinge plate corresponding to the front-row flexible down-pressure mechanism are respectively longer than those corresponding to the rear-row flexible down-pressure mechanism. In this way, through reasonable design and layout, the efficient and stable operation of the bracket and the flexible down-pressure mechanism thereon is achieved, meeting the technical requirements in actual operation.

[0012] Optionally, a connecting rod is threaded through the hinge plates provided on the bracket, and a protective shell rotatably connected thereto and used for covering the flexible down-pressure mechanism is provided on the connecting rod, and an exhaust fan is provided on the protective shell. In this way, the combined design of the hinge plates, connecting rod, and protective shell on the bracket can not only effectively protect the flexible down-pressure mechanism, but also achieve effective heat dissipation through the exhaust fan, ensuring good temperature management and safety while the device is working efficiently. This design improves the overall performance of the device and ensures its stability and reliability in various working environments.

[0013] Optionally, the grinding head further includes a mounting plate for fixing the bracket, and the mounting plate is used to be arranged on the walking chassis of the grinding robot.

[0014] Optionally, a spring bolt is provided on each of the two sides below the connecting rod on the protective shell, and clamping grooves for limiting the spring bolts are provided on the two corresponding sides of the mounting plate.

[0015] The flexible down - pressure mechanism and grinding head of the present invention have the following beneficial effects: High - efficiency grinding and cleaning device: Through the provided flexible down - pressure mechanism, the grinding head can adapt to the surface of steel formwork or welds with a certain small curvature with reasonable pressure and elasticity. This design enables the robot to flexibly adjust the pressure applied, and combined with adjustable shock - absorbing springs, accurately apply pressure according to the requirements of the grinding degree, thereby improving the operation efficiency and grinding quality.

[0016] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0018] Figure 1 is the structural schematic diagram of the flexible down - pressure grinding mechanism of the present invention;

[0019] Figure 2 is Figure 1 the exploded structural schematic diagram of;

[0020] Figure 3 is the structural schematic diagram of the grinding head applying the flexible down - pressure grinding mechanism of the present invention;

[0021] Figure 4 is Figure 3 the exploded structural schematic diagram of;

[0022] Figure 5 is Figure 3 the three - dimensional structural schematic of removing the top plate and one angle grinder in;

[0023] Figure 6 is Figure 4 the structural schematic diagram of the bracket in;

[0024] Figure 7 is Figure 3 the perspective front - view structural schematic diagram of the grinding head with a protective shell added in;

[0025] Reference numerals:

[0026] 1 - mounting plate;

[0027] 11 - card slot;

[0028] 2 - grinding head;

[0029] 21 - Bracket, 22 - Flexible reduction mechanism, 23 - Angle grinder, 24 - Protective shell;

[0030] 211 - Vertical frame, 212 - Triangular brace, 213 - Padding rod, 214 - First mounting hole, 215 - Hinge plate, 216 - Second mounting hole, 217 - Third mounting hole, 218 - Connecting rod;

[0031] 221 - Upright frame, 222 - Bolt assembly, 223 - U - shaped support plate, 224 - Triangular groove frame, 225 - H - shaped bifurcated arm, 226 - Adjustable shock - absorbing spring, 227 - Connecting plate;

[0032] 2211 - Triangular plate, 2212 - Square tube;

[0033] 2231 - Connecting ear;

[0034] 2241 - First hinge shaft, 2242 - Fourth hinge shaft, 2243 - Fifth hinge shaft, 2244 - First weight - reducing hole;

[0035] 2251 - Second hinge shaft, 2252 - Third hinge shaft, 2253 - Second weight - reducing hole;

[0036] 2271 - Fixed plate, 2272 - Pin shaft;

[0037] 241 - Exhaust fan, 242 - Spring bolt. Detailed implementation mode

[0038] The present invention will be further described below in conjunction with the detailed implementation mode. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well - known structures and their descriptions in the attached drawings may be omitted.

[0039] As Figures 1-7As shown, the flexible pressing mechanism of the angle grinder mentioned in this embodiment, the flexible pressing mechanism 22 is used to flexibly press the angle grinder 23 to fit closely and adapt to the surface of the processed object. The angle grinder 23 is a tool for actual grinding operations. The flexible pressing mechanism 22 includes a stand 221, a U-shaped support plate 223, a triangular slot frame 224, an H-shaped two-fork arm 225, an adjustable shock-absorbing spring 226 and a connecting plate 227, wherein the stand 221 is used to be connected to the upper part of the angle grinder 23 to provide a connecting support, the U-shaped support plate 223 is used to support the lower part of the angle grinder 23 to provide a receiving support, and the stand 221 is connected to the U-shaped support plate 223 to clamp the angle grinder 23 to ensure its stability during the grinding process; the triangular slot frame 224 has three hinge axes, namely a first hinge axis 2241, a fourth hinge axis 2242 and a fifth hinge axis 2243 to provide flexible movement; the triangular groove frame 224 is hinged to the U-shaped support plate 223 through the fourth hinge shaft 2242; the two ends of the H-shaped two-fork arm 225 are respectively provided with a second hinge shaft 2251 and a third hinge shaft 2252; the H-shaped two-fork arm 225 is hinged to the two frames 221 through the third hinge shaft 2252 to form a flexible supporting structure; the connecting plate 227 is rotatably arranged on the second hinge shaft 2251, and the adjustable shock-absorbing spring 226 has the functions of shock absorption and pressure regulation, and its two ends are respectively hinged to the fifth hinge shaft 2243 and the connecting plate 227. Of course, in different examples, the adjustable shock-absorbing spring can also adopt a hydraulic damper to improve the shock absorption accuracy; or the adjustable shock-absorbing spring can be replaced by an electronically controlled hydraulic damper, and the grinding pressure is monitored in real time by a sensor, and the damping coefficient is automatically adjusted to adapt to different surface hardness requirements. It also relates to a bracket 21, which is used to connect and install the flexible pressing mechanism 22, that is, the connecting plate 227 is fixedly connected to the bracket 21, and is connected to the H-shaped two-fork arm 225 and the adjustable shock-absorbing spring 226 to assist in transmitting the applied pressure; the first hinge shaft 2241 and the second hinge shaft 2251 are respectively rotatably connected to the bracket 21. The above scheme is adopted, and its working principles are as follows: First, shock absorption and pressure adjustment. The design of the adjustable shock-absorbing spring enables the flexible pressing mechanism to not only absorb the vibration generated by the angle grinder during the grinding process, but also adjust the applied pressure according to the surface condition of the steel template. This pressure adjustment ability can ensure that the angle grinder always maintains a suitable contact force during grinding, thereby improving the grinding efficiency and effect. Second, the horizontal holding mechanism, through the parallel connecting rod structure formed by the vertical frame, the U-shaped support plate and the triangular groove frame, and the linkage design with the H-shaped two-fork arm, the angle grinder grinding sheet is always kept level with the surface of the processed object (steel template). This design ensures consistency during the grinding process and avoids uneven grinding caused by angle changes. The third is elastic space. The design of the flexible pressing mechanism provides a certain elastic space, allowing the angle grinder to adapt to different surface shapes and irregularities, such as welds or partial curved surfaces, to further improve the adaptability and effect of grinding, so as to be able to fully grind and clean the steel formwork.

[0040] In this embodiment, the vertical frame 221, the U-shaped support plate 223, the triangular groove frame 224, the H-shaped double-arm 225 and the connecting plate 227 are all made of sheet metal parts. That is, by using sheet metal parts, the weight reduction and strength optimization of each component are realized, ensuring the stability and durability of the overall structure. Moreover, a hollow first weight-reducing hole 2244 is provided on the triangular groove frame 224, and a hollow second weight-reducing hole 2253 is provided on the H-shaped double-arm 225, which not only reduces the weight of the structure, but also improves the heat dissipation performance of the angle grinder 23 to a certain extent.

[0041] In this embodiment, the vertical frame 221 includes triangular plates 2211 symmetrically fixed on both sides of the angle grinder 23 and a square tube 2212 connecting the two triangular plates 2211; a connecting ear 2231 is provided on each wing of the U-shaped support plate 223; both ends of the square tube 2212 are respectively extended outside their respective triangular plates 2211 and are connected to the connecting ear 2231 of the U-shaped support plate 223 through a bolt assembly 222. In this way, the cooperation between the vertical frame 221 and the U-shaped support plate 223 can fix the angle grinder 23 in the XYZ three-axis directions, ensuring the firmness and reliability of the connection.

[0042] In this embodiment, the connecting plate 227 is provided as two pieces arranged side by side, enhancing the support capacity of the structure. And a pin shaft 2272 rotatably connected to the adjustable shock-absorbing spring 226 is provided between the two connecting plates 227. This design can effectively absorb vibrations and improve the stability of the equipment. A fixing plate 2271 is provided at the bottom of the distal ends of the two connecting plates 227 away from the pin shaft 2272. The fixing plate 2271 provides additional support, and the two connecting plates 227 are fixedly connected to the bracket 21 through the fixing plate 2271, ensuring the stability and safety of the overall structure.

[0043] This embodiment also mentions a grinding head. The grinding head 2 adopts the above-mentioned flexible down-pressure mechanism of the angle grinder, and the design structure of the bracket 21 is very important. It provides basic support for the installation and stability of multiple flexible down-pressure mechanisms 22. That is, in different examples, multiple flexible down-pressure mechanisms 22 are connected to the bracket 21 in a single-row parallel or two-row staggered arrangement. For example, three angle grinders 23 are arranged in a triangular formation. Specifically, the bracket 21 consists of a vertical frame 211, triangular braces 212, and hinge plates 215. On one side of the vertical frame 211, at least two triangular braces 212 are arranged side by side at intervals. At the upper part of the vertical frame 211, there is a hinge plate 215 for connecting the H-shaped binary arm 225. This design ensures the flexibility and adaptability of the mechanism. The H-shaped binary arm 225 of a single flexible down-pressure mechanism 22 corresponds to two hinge plates 215, and the two hinge plates 215 are provided with second mounting holes 216 for connecting to the second hinge shaft 2251, thus providing a convenient interface for the installation of the H-shaped binary arm 225; at the top of the vertical frame 211, there is a third mounting hole 217 for fixedly connecting to the fixing plate 2271, which is used for fixedly connecting to the fixing plate 2271 to further enhance the stability of the entire structure; at the lower part of the vertical frame 211, there is a first mounting hole 214 for connecting to the first hinge shaft 2241 of the triangular groove frame 224. Such a design enables the triangular groove frame 224 to be connected to the vertical frame 211 of the bracket 21, ensuring that the flexible down-pressure mechanism does not displace or loosen during operation.

[0044] In this embodiment, the bracket 21 further includes a spacer rod 213 for the elongation of the front-row flexible down-pressure mechanism 22 in the two-row staggered arrangement. And at the lower part of the spacer rod 213, there is a first mounting hole 214 for connecting to the first hinge shaft 2241 of the triangular groove frame 224 of the front-row flexible down-pressure mechanism 22. This design ensures that the front-row flexible down-pressure mechanism 22 can form a staggered arrangement with the rear-row flexible down-pressure mechanism 22 and has stability and flexibility during operation. Specifically, the triangular groove frame 224, H-shaped binary arm 225, connecting plate 227, and hinge plate 215 corresponding to the front-row flexible down-pressure mechanism 22 are respectively longer than those corresponding to the rear-row flexible down-pressure mechanism 22. This design of the staggered layout not only enables the front-row and rear-row components to work effectively in coordination but also avoids interference between them; it also improves the compactness of the overall structure and can achieve better force transmission and support effects during operation.

[0045] In this embodiment, a connecting rod 218 is threaded through a hinge plate 215 provided on the bracket 21. A protective housing 24 is provided on the connecting rod 218 and is rotatably connected thereto for covering the flexible pressing mechanism 22. This design of the rotational connection enables the protective housing 24 to be opened or closed as needed, facilitating the maintenance and replacement of the flexible pressing mechanism 22, and also being able to effectively protect the mechanism during the working state. At the same time, the protective housing 24 can prevent external objects from damaging the mechanism, thereby improving the reliability and service life of the equipment. The design of the protective housing also takes into account the overall aesthetics and enhances the appearance of the equipment. A exhaust fan 241 is provided on the protective housing 24, mainly for heat dissipation and ventilation. As the grinding work of the angle grinder 23 is carried out, heat is generated, and the exhaust fan 241 can effectively discharge the generated heat, keeping the internal temperature within a reasonable range, and also having a certain effect of adsorbing and dispersing the grinding dust. This design helps to prevent performance degradation or equipment failure caused by overheating.

[0046] In this embodiment, the grinding head 2 further includes a mounting plate 1 for fixing the bracket 21, and the mounting plate 1 is used to be arranged on the traveling chassis (not shown) of the grinding robot. Specifically for the application of the grinding head 2, three angle grinders 23 are adopted in this embodiment, and a corresponding flexible pressing mechanism 22 is configured for each angle grinder. These angle grinders 23 are arranged in a staggered arrangement in two rows relative to the bracket 21 in a triangular formation. This design of the triangular layout enables the grinding discs of the angle grinders to effectively cover the main body of the traveling chassis, ensuring the comprehensiveness and uniformity of the grinding process. It is worth mentioning that the disc diameter of the grinding disc of the angle grinder 23 is 5 inches, which is larger than the conventional size. This customized design significantly improves the grinding efficiency. This improvement is not only reflected in the working efficiency, but also in being able to better adapt to different grinding requirements and ensuring an ideal grinding effect in practical applications. In addition, considering the opening and closing fixation problem of the protective housing 24, a spring bolt 242 is provided on each side of the protective housing 24 below the connecting rod 218, and a slot 11 for cooperating with the spring bolt 242 for limiting is opened on the corresponding two sides of the top plate 10, so as to achieve a locking effect when the protective housing 24 is closed by using the cooperation relationship between the spring bolt and the slot.

[0047] The core innovative structures of this angle grinder flexible pressing mechanism and grinding head are as follows:

[0048] 1. Articulated linkage design of the flexible roll gap mechanism. Its innovation lies in: through the multi-axis articulated linkage design of the vertical frame, U-shaped support plate, triangular groove frame, H-shaped double-arm and adjustable shock-absorbing spring, the three-dimensional dynamic adaptive adjustment of the angle grinder is realized to ensure that the grinding head always fits the surface of the object to be processed. Especially the composite structure of "triangular groove frame + double-arm" is adopted, combined with the elastic pressure mechanism of the adjustable shock-absorbing spring, which solves the technical problem that the traditional rigid mechanism cannot adapt to curved and irregular surfaces.

[0049] 2. Grinding head structure with multi-row staggered layout. Its innovation lies in: arranging single-row or two-row staggered flexible roll gap mechanisms on the bracket to form a grinding coverage like a character "pin", significantly improving the grinding efficiency and uniformity. Especially the front-row flexible roll gap mechanism is designed with an extended cushion rod to avoid interference with the rear-row flexible roll gap mechanism, while enhancing the stability and adaptability of the overall structure.

[0050] 3. Integrated design of lightweight and heat dissipation. Its innovation lies in: the sheet metal parts are combined with hollowed-out weight-reducing holes to reduce the weight while ensuring the strength; and the protective shell integrates an exhaust fan to achieve active heat dissipation and dust emission. Especially the lightweight design is convenient for robot loading, and the exhaust fan extends the service life of the equipment.

[0051] 4. Modular installation and rapid maintenance mechanism. Its innovation lies in: the installation plate cooperates with the spring pin and the card slot to realize the rapid opening and closing of the protective shell and simplify the maintenance process. Especially the modular design supports the independent replacement of the flexible roll gap mechanism, reducing the operation and maintenance costs.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A flexible pressing mechanism for an angle grinder, characterized in that, The flexible pressing mechanism (22) is used to flexibly press the angle grinder (23) to closely adhere to and adapt to the surface of the processed object, and comprises a stand (221), a U-shaped support plate (223), a triangular slot frame (224), an H-shaped two-fork arm (225), an adjustable shock-absorbing spring (226) and a connecting plate (227), wherein the stand (221) is used to be connected to the angle grinder (23), the U-shaped support plate (223) is used to support the angle grinder (23), and the stand (221) and the U-shaped support plate (223) are connected to clamp the angle grinder (23); the three corner ends of the triangular slot frame (224) are respectively provided with a first hinge shaft (2241), The fourth hinge axis (2242) and the fifth hinge axis (2243) of the triangular groove frame (224) are hingedly connected to the U-shaped support plate (223) via the fourth hinge axis (2242); the two ends of the H-shaped two-fork arm (225) are respectively provided with a second hinge axis (2251) and a third hinge axis (2252); the H-shaped two-fork arm (225) is hingedly connected to the two frames (221) via the third hinge axis (2252); the connecting plate (227) is rotatably arranged on the second hinge axis (2251), and the two ends of the adjustable shock-absorbing spring (226) are respectively hingedly connected to the fifth hinge axis (2243) and the connecting plate (227).

2. The flexible depth-of-cut mechanism of the angle grinder according to claim 1, characterized in that The stand (221), the U-shaped support plate (223), the triangular groove frame (224), the H-shaped two-fork arm (225) and the connecting plate (227) are all made of sheet metal parts, and the triangular groove frame (224) is provided with a hollow first weight-reducing hole (2244), and the H-shaped two-fork arm (225) is provided with a hollow second weight-reducing hole (2253).

3. The flexible roll gap mechanism of the angle grinder according to claim 1, wherein The stand (221) comprises triangular plates (2211) symmetrically fixed on both sides of the angle grinder (23) and a square tube (2212) connecting the two triangular plates (2211); a connecting ear (2231) is respectively provided on the two wings of the U-shaped support plate (223); and both ends of the square tube (2212) are connected to the connecting ears (2231) of the U-shaped support plate (223) through a bolt assembly (222) after extending out of their respective triangular plates (2211).

4. The flexible roll gap mechanism of the angle grinder according to any one of claims 1-3, characterized in that The connecting plates (227) are arranged in two pieces side by side, and a pin shaft (2272) rotatably connected to the adjustable shock-absorbing spring (226) is arranged between the two connecting plates (227). A fixing plate (2271) is arranged at the bottom of the far end of the two connecting plates (227) away from the pin shaft (2272).

5. The angle grinder flexible roll gap adjusting mechanism according to claim 4, characterized in that, It also includes a bracket (21), a first hinge shaft (2241) and a second hinge shaft (2251) of the flexible pressing mechanism (22) are respectively rotatably connected to the bracket (21), and a fixed plate (2271) of the flexible pressing mechanism (22) is fixedly connected to the bracket (21).

6. A grinding head, characterized in that, The grinding head (2) adopts the angle grinder flexible pressure-down mechanism described in any one of claims 1-5. A plurality of the flexible pressure-down mechanisms (22) are connected to the bracket (21) and arranged in a single row side by side or in two rows offset. The bracket (21) is composed of a vertical frame (211), triangular braces (212), and hinge plates (215). At least two triangular braces (212) are arranged side by side at intervals on one side of the vertical frame (211). A hinge plate (215) for connecting the H-shaped bifurcated arm (225) is provided at the upper part of the vertical frame (211). The H-shaped bifurcated arm (225) of a single flexible pressure-down mechanism (22) corresponds to two hinge plates (215), and second mounting holes (216) for connecting the second hinge shaft (2251) are provided on the two hinge plates (215); a third mounting hole (217) for fixedly connecting to the fixed plate (2271) is provided at the top of the vertical frame (211); a first mounting hole (214) for connecting to the first hinge shaft (2241) of the triangular groove frame (224) is provided at the lower part of the vertical frame (211).

7. The grinding head according to claim 6, characterized in that, The bracket (21) further includes a cushion rod (213) for the elongation of the front-row flexible pressure-down mechanism (22) in the two-row offset arrangement, and a first mounting hole (214) for connecting to the first hinge shaft (2241) of the triangular groove frame (224) of the front-row flexible pressure-down mechanism (22) is provided at the lower part of the cushion rod (213); the triangular groove frame (224), H-shaped bifurcated arm (225), connecting plate (227), and hinge plate (215) corresponding to the front-row flexible pressure-down mechanism (22) are respectively longer than those corresponding to the rear-row flexible pressure-down mechanism (22).

8. The grinding head according to claim 6, characterized in that, The hinge plates (215) provided on the bracket (21) are strung with a connecting rod (218). A protective shell (24) that is rotatably connected to the connecting rod (218) and used to cover the flexible pressure-down mechanism (22) is provided on the connecting rod (218), and an exhaust fan (241) is provided on the protective shell (24).

9. The grinding head according to any one of claims 6-8, characterized in that, The grinding head (2) further includes a mounting plate (1) for fixing the bracket (21), and the mounting plate (1) is used to be arranged on the traveling chassis of the grinding robot.

10. The grinding head according to claim 9, characterized in that, Spring pins (242) are respectively arranged on both sides below the connecting rod (218) on the protective shell (24), and clamping grooves (11) for limiting the spring pins (242) are provided on the corresponding two sides of the mounting plate (1).

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