A construction tool blade structure with directional adaptive deformation capability

Abstract

This invention relates to the field of construction tool technology, specifically to a construction tool blade structure with directional adaptive deformation capability. The blade body includes a central deformation section and a first side working section and a second side working section respectively connected to both sides of the central deformation section. The thicknesses of the central deformation section, the first side working section, and the second side working section are H1, H2, and H3, respectively, and satisfy H1 < H2 and H1 < H3. The blade body is configured such that when the handle is connected to the central deformation section, both the first and second side working sections serve as working surfaces; when the handle is connected to the second side working section, the second side working section serves as the working surface. By making the central deformation section relatively thin, the blade body will undergo elastic deformation by bending towards the top surface when subjected to force, allowing the bottom surface of the side working section, which serves as the working surface, to actively adapt to the slight undulations of the construction surface, avoiding rigid scraping and significantly improving the flatness and smoothness of the construction surface.

Description

Technical Field

[0001] This invention relates to the field of construction tools technology, and more specifically to a construction tool blade structure with directional adaptive deformation capability. Background Technology

[0002] Currently, in building decoration and renovation projects, trowels and leveling knives are commonly used tools for smoothing and finishing cement mortar, putty layers, or epoxy floor coatings on walls and floors. Traditional blades are usually completely rigid flat surfaces made of spring steel or stainless steel. This structure has the following drawbacks during construction: First, a completely rigid structure cannot adapt to the slight undulations of the substrate. When there are local depressions or protrusions on the construction surface, the rigid blade will cross these undulations, resulting in the protrusions not being effectively leveled and the depressions not being filled, thus leaving scratches, ripples, or trowel marks on the construction surface, seriously affecting the final flatness and smoothness. Especially in the construction of large-area epoxy flooring, it is difficult to completely avoid the slight undulations of the substrate, and the rigid blade often causes "wavy lines" on the surface, affecting the aesthetics and service life.

[0003] Secondly, to address the aforementioned issues, some improvements have employed integral flexible blades, such as reducing the overall blade thickness or using flexible materials. However, while this integral flexible structure improves adhesion, it results in a severe lack of overall blade rigidity. During the application and pressing process, the blade is prone to excessive deformation and bending, leading to poor operational stability and an inability to guarantee edge straightness, ultimately reducing the quality of the application. Particularly in the finishing stage, a certain degree of blade rigidity is required to compact and finish the slurry, a requirement that integral flexible blades often fail to meet.

[0004] In view of the above-mentioned technical problems, this invention is proposed. Summary of the Invention

[0005] The technical problem this invention aims to solve is to provide a construction tool blade structure with directional adaptive deformation capability, addressing the issue that existing blades cannot simultaneously achieve a good fit, resulting in uneven and unsmooth finishing operations. This construction tool blade structure, used for connection to a tool handle, includes a sheet-like blade body. The blade body includes a central deformation section and a first side working section and a second side working section respectively connected to both sides of the central deformation section. The thicknesses of the central deformation section, the first side working section, and the second side working section are H1, H2, and H3, respectively, satisfying H1 < H2 and H1 < H3. The blade body is configured such that when the tool handle is connected to the central deformation section, both the first and second side working sections serve as working surfaces; when the tool handle is connected to the second side working section, the second side working section serves as the working surface. By making the middle deformation section relatively thin, the blade body will produce elastic deformation by bending towards the top surface when subjected to force, so that the bottom surface of the first or second side working part can actively adapt to the slight undulations of the construction surface, avoiding rigid scraping and significantly improving the flatness and smoothness of the construction surface.

[0006] To address the aforementioned technical problems, this invention proposes a construction tool blade structure with directional adaptive deformation capability. This construction tool blade structure is used to connect with a tool handle and includes a sheet-like blade body. The blade body includes a central deformation section and a first side working section and a second side working section respectively connected to both sides of the central deformation section. The thicknesses of the central deformation section, the first side working section, and the second side working section are H1, H2, and H3, respectively, and satisfy H1 < H2 and H1 < H3. Furthermore, the blade body is configured such that when the handle is connected to the central deformation portion, both the first side working portion and the second side working portion serve as working surfaces; when the handle is connected to the second side working portion, the first side working portion serves as a working surface; and after the first side working portion or the second side working portion is subjected to construction force, the central deformation portion undergoes elastic deformation by bending towards the top surface, so that the bottom surface of the first side working portion or the second side working portion can adaptively conform to the construction surface for work.

[0007] As described above, in the construction tool blade structure with directional adaptive deformation capability, a through groove is formed on the top surface of the central deformation section along the length direction. The through groove makes the thickness H1 of the central deformation section smaller than the thickness H2 of the first side working section and the thickness H3 of the second side working section.

[0008] As described above, the widths of the construction tool blade structure with directional adaptive deformation capability are B1, B2, and B3, respectively, of the central deformation section, the first side working section, and the second side working section; when both the first side working section and the second side working section serve as working surfaces, B1 > B2 and B1 > B3 are satisfied.

[0009] As described above, the widths of the construction tool blade structure with directional adaptive deformation capability are B1, B2, and B3, respectively, of the central deformation section, the first side working section, and the second side working section; when only the first side working section is used as the working surface, B2 < B1 < B3 is satisfied.

[0010] As described above, in the construction tool blade structure with directional adaptive deformation capability, a transition structure is provided between the central deformation part and the first side working part and / or the second side working part, wherein the transition structure is an arc transition or a sloped gradual transition.

[0011] As described above, in the construction tool blade structure with directional adaptive deformation capability, the thickness H2 of the first side working part is the same as the thickness H3 of the second side working part, and the thickness H1 of the middle deformation part is 1 / 3 to 2 / 3 of the thickness H2 of the first side working part.

[0012] As described above, in the construction tool blade structure with directional adaptive deformation capability, the bottom surfaces of the first side working part and the second side working part are coplanar with the bottom surface of the central deformation part, together forming the continuous planar bottom surface of the blade body.

[0013] The through-slot of the construction tool blade structure with directional adaptive deformation capability described above is formed by stamping or grinding.

[0014] The construction tool blade structure with directional adaptive deformation capability described above has a bottom surface of the blade body that has been polished.

[0015] As described above, the construction tool blade structure with directional adaptive deformation capability has rounded corner structures at both ends of the second side working part when only the first side working part is used as the working surface.

[0016] Compared with the prior art, the construction tool blade structure of the present invention with directional adaptive deformation capability has the following advantages: 1. In this application, by setting a thinning structure in the middle deformation section, the blade body will produce elastic deformation by bending towards the top surface when subjected to force, so that the bottom surface of the side working part, which serves as the working surface, can actively adapt to the slight undulations of the construction surface, avoiding rigid scraping and significantly improving the flatness and smoothness of the construction surface.

[0017] 2. The first and second side working sections, which maintain their original thickness on both sides, provide sufficient overall rigidity so that the first and second side working sections will not deform excessively during construction, ensuring a smooth working surface during finishing operations.

[0018] 3. During finishing operations, because the central deformation section 11 is relatively thin, it is easy for workers to bend and deform after applying force, making the operation less strenuous. Furthermore, during finishing, because the central deformation section bends, only the first or second side working section and part of the central deformation section will contact the work surface, effectively reducing the contact area. This makes finishing operations easier for workers and allows for a smoother process.

[0019] 4. In this application, by setting an arc transition or a sloped gradual transition structure between the central deformation part and the side working part, stress concentration is effectively avoided; the rounding treatment of the two corners of the non-working side part avoids accidental scratches during construction and improves operational safety. Attached Figure Description

[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the blade body in this invention.

[0021] Figure 2 This is a schematic diagram of the connection between the tool holder and the middle deformation part in this invention.

[0022] Figure 3 This is a schematic diagram of the connection between the tool holder and the second side working part in this invention.

[0023] Figure 4 This is another structural schematic diagram of the blade body in this invention.

[0024] Figure 5 yes Figure 4 A magnified structural diagram of point A in the middle.

[0025] Figure 6 This is another structural schematic diagram of the blade body in this invention.

[0026] In the figure: 1. Blade body; 11. Middle deformation section; 12. First side working section; 13. Second side working section; 2. Through groove; 3. Transition structure. Detailed Implementation

[0027] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0028] like Figure 1-6As shown, the present invention includes a construction tool blade structure with directional adaptive deformation capability. The construction tool blade structure is used to connect with a tool handle and includes a sheet-like blade body 1. The blade body 1 is made of a metal material with good elasticity and toughness, such as 65Mn spring steel, 304 stainless steel or 420J2 stainless steel, and the thickness can be selected between 2mm and 8mm depending on the application scenario.

[0029] The blade body 1 includes a central deformation portion 11 and a first side working portion 12 and a second side working portion 13 respectively connected to both sides of the central deformation portion 11. The thicknesses of the central deformation portion 11, the first side working portion 12, and the second side working portion 13 are H1, H2, and H3, respectively, and satisfy H1 < H2 and H1 < H3. In this embodiment, H1 is 3 mm to 5 mm, and H2 and H3 can be 5 mm to 8 mm.

[0030] In this embodiment, the blade body 1 and the handle have two connection methods, thereby achieving two usage methods. For example... Figure 2 As shown, in the first method, when the tool handle is connected to the central deformation part 11, both the first side working part 12 and the second side working part 13 are used as working surfaces. Both the first side working part 12 and the second side working part 13 can be used for finishing and smoothing operations, forming a wide working surface. This mode is suitable for rough finishing and fine finishing operations on large areas of floors and walls, covering a large area in one operation and achieving high efficiency. Figure 3 As shown, in the second method, when the handle is connected to the second side working part 13, the first side working part 12 is used as the working surface. The first side working part 12 is then used for finishing and smoothing operations. This mode is suitable for fine finishing operations in narrow areas such as wall corners, baseboards, door and window corners, and pipe roots, and allows for flexible access to confined spaces.

[0031] Because the thickness H1 of the central deformation section 11 is less than the thickness H2 of the first side working section 12 and the thickness H3 of the second side working section 13, when pressure is applied by the tool handle, the central deformation section 11 undergoes elastic deformation by bending towards the top surface after the first side working section 12 or the second side working section 13 is subjected to construction force. This allows the bottom surface of the first side working section 12 or the second side working section 13 to adaptively conform to the construction surface for work. More specifically, during finishing operations, the thinner thickness of the central deformation section 11 gives it elastic deformation capabilities, enabling it to bend under external force. When encountering a protrusion, the bottom surface of the first side working section 12 or the second side working section 13 will slightly rise, adapting to the undulations of the construction surface and avoiding rigid scraping, significantly improving the flatness and smoothness of the construction surface. The first side working part 12 or the second side working part 13 on both sides is relatively thick, which ensures that the first side working part 12 and the second side working part 13 will not be excessively deformed during construction, and ensures that the construction surface is flat during finishing operations, thus solving the problem that the existing technology cannot take into account both flexible bonding and rigid support.

[0032] It is worth mentioning that during the finishing process, because the central deformation section 11 is relatively thin, it is easy for the worker to bend and deform after applying force, making the operation less strenuous. Furthermore, during finishing, because the central deformation section 11 is bent, only the first side working section 12 or the second side working section 13 and part of the central deformation section 11 will come into contact with the work surface. This effectively reduces the contact area, making the finishing process less strenuous and smoother for the worker.

[0033] like Figure 1 As shown, as a further embodiment, a through groove 2 is formed on the top surface of the central deformation portion 11 along its length. The through groove 2 makes the thickness H1 of the central deformation portion 11 smaller than the thickness H2 of the first side working portion 12 and the thickness H3 of the second side working portion 13. The through groove 3 is formed by stamping or grinding. Stamping can be used for mass production, which is efficient and low-cost. Grinding can be used for high-precision machining or small-batch production. In addition, the depth of the through groove 2 is determined according to the required H1, which is usually 2mm to 4mm, and the width is 20mm to 40mm. At the same time, the presence of the through groove 2 further reduces the bending stiffness of the central portion, making elastic deformation more sensitive and controllable.

[0034] like Figure 2 and Figure 4As shown, as a further embodiment, the widths of the central deformation section 11, the first side working section 12, and the second side working section 13 are B1, B2, and B3, respectively; when both the first side working section 12 and the second side working section 13 serve as working surfaces, B1 > B2 and B1 > B3. In this embodiment, B2 and B3 are the same, with B2 ranging from 8 mm to 12 mm and B1 ranging from 60 mm to 80 mm. The central deformation section 11 has a larger width, providing sufficient deformation area and deformation amount to ensure adaptive fitting effect. The wider central section also provides ample space for tool holder installation. The smaller widths of the side working sections facilitate concentrated pressure for smoothing operations, making construction more efficient. Furthermore, the equal widths of the side working sections ensure force symmetry and construction uniformity in the dual-working-surface mode.

[0035] like Figure 3 and Figure 6 As shown, as a further embodiment, the widths of the central deformation section 11, the first side working section 12, and the second side working section 13 are B1, B2, and B3, respectively; when only the first side working section 12 serves as the working surface, B2 < B1 < B3. In this embodiment, B2 is 8mm to 12mm, B1 is 15mm to 25mm, and B3 is 55mm to 75mm. The effect of this width relationship is: the first side working section 12, as the tool holder connecting part, has the smallest width B2, which facilitates the clamping and fixing of the tool holder fixture; the width B1 of the central deformation section 11 is in the middle, which can ensure sufficient elastic deformation capacity without making the overall structure too wide; the width B3 of the second side working section 13 is the largest, providing sufficient construction area for the working surface, suitable for precision operations. This optimized width ratio design makes the force transmission path more reasonable and the deformation response more sensitive in the single-sided working mode, while maximizing the area of ​​the effective working surface.

[0036] like Figure 3 As shown, furthermore, when only the first side working part 12 serves as the working surface, the second side working part 13 is provided with rounded corner structures at both ends in its length direction. By providing rounded corner structures, sharp corners can be avoided from injuring the operator's hands or body, improving operational safety. In addition, rounded corners also help reduce stress concentration at the ends, improve the overall strength of the blade, and prevent corner cracking.

[0037] like Figure 5As shown, as a further embodiment, a transition structure 3 is provided between the central deformation section 11 and the first side working section 12 and / or the second side working section 13. The transition structure 3 is an arc transition or a sloped gradual transition. The function of this transition structure 3 is to avoid stress concentration at the abrupt change in thickness. During repeated construction stress, a large alternating stress will be generated at the abrupt change in thickness, which can easily lead to fatigue fracture after long-term use. By setting an arc transition or a sloped gradual transition, the stress can be smoothly transferred and dispersed, significantly improving the fatigue life of the blade under long-term reciprocating bending use, preventing cracking in the transition zone, and thus extending the service life of the blade.

[0038] like Figure 3 As shown, as a further embodiment, the thickness H2 of the first side working part 12 is the same as the thickness H3 of the second side working part 13, and the thickness H1 of the central deformation part 11 is 1 / 3 to 2 / 3 of the thickness H2 of the first side working part 12. Extensive construction tests have verified that when H1 is within this range, the blade can achieve the best balance between adaptive deformation capability and anti-collapse stiffness. If H1 is less than 1 / 3 of H2, the central deformation part is too flexible, easily causing excessive deformation or even collapse under construction pressure, resulting in insufficient overall blade stiffness and excessive bending during construction, which negatively affects flatness. If H1 is greater than 2 / 3 of H2, the deformation capability is insufficient and not significantly different from that of a conventional rigid blade. Therefore, in this embodiment, the preferred value is H1 = H2 / 2, for example, when H2 = H3 = 1.0 mm, H1 = 0.5 mm.

[0039] As a further embodiment, the bottom surfaces of the first side working part 12 and the second side working part 13 are coplanar with the bottom surface of the central deformation part 11, together forming a continuous planar bottom surface of the blade body 1. The bottom surface of the blade body 1 is a polished plane. This ensures that the entire blade bottom surface maintains continuous and flat contact with the work surface, avoiding excessive local pressure or scratches caused by uneven bottom surfaces. If the bottom surface of the central deformation part is not coplanar with the bottom surface of the side working part (e.g., the central part sinks), step-like marks will be left on the work surface, seriously affecting the construction quality. The design of a continuous planar bottom surface ensures that the blade can form a complete and uniform contact surface during smoothing operations, improving the construction quality.

Claims

1. A construction tool blade structure with directional adaptive deformation capability, the construction tool blade structure being used for connection with a tool holder, characterized in that... The blade body (1) includes a sheet-like blade body (1), which includes a central deformation section (11) and a first side working section (12) and a second side working section (13) respectively connected to both sides of the central deformation section (11). The thicknesses of the central deformation section (11), the first side working section (12) and the second side working section (13) are H1, H2 and H3 respectively, and satisfy H1 < H2 and H1 < H3. Furthermore, the blade body (1) is configured such that when the handle is connected to the central deformation part (11), both the first side working part (12) and the second side working part (13) are used as working surfaces; when the handle is connected to the second side working part (13), the first side working part (12) is used as a working surface; and after the first side working part (12) or the second side working part (13) is subjected to construction force, the central deformation part (11) bends elastically toward the top surface so that the bottom surface of the first side working part (12) or the second side working part (13) can adaptively conform to the construction surface for work.

2. The construction tool blade structure with directional adaptive deformation capability according to claim 1, characterized in that... The top surface of the central deformation part (11) has a through groove (2) along the length direction, and the through groove (2) makes the thickness H1 of the central deformation part (11) smaller than the thickness H2 of the first side working part (12) and the thickness H3 of the second side working part (13).

3. The construction tool blade structure with directional adaptive deformation capability according to claim 1, characterized in that... The widths of the central deformation section (11), the first side working section (12), and the second side working section (13) are B1, B2, and B3, respectively; when the first side working section (12) and the second side working section (13) are both working surfaces, B1 > B2 and B1 > B3 are satisfied.

4. The construction tool blade structure with directional adaptive deformation capability according to claim 1, characterized in that... The widths of the central deformation section (11), the first side working section (12), and the second side working section (13) are B1, B2, and B3, respectively; when only the first side working section (12) is used as the working surface, B2 < B1 < B3 is satisfied.

5. The construction tool blade structure with directional adaptive deformation capability according to claim 1, characterized in that... A transition structure (3) is provided between the central deformation part (11) and the first side working part (12) and / or the second side working part (13), wherein the transition structure (3) is an arc transition or a sloped gradual transition.

6. The construction tool blade structure with directional adaptive deformation capability according to claim 1, characterized in that... The thickness H2 of the first side working part (12) is the same as the thickness H3 of the second side working part (13), and the thickness H1 of the middle deformation part (11) is 1 / 3 to 2 / 3 of the thickness H2 of the first side working part (12).

7. The construction tool blade structure with directional adaptive deformation capability according to claim 1, characterized in that... The bottom surfaces of the first side working part (12) and the second side working part (13) are coplanar with the bottom surface of the middle deformation part (11), and together they form the continuous planar bottom surface of the blade body (1).

8. The construction tool blade structure with directional adaptive deformation capability according to claim 2, characterized in that... The through groove (3) is formed by stamping or grinding.

9. The construction tool blade structure with directional adaptive deformation capability according to claim 7, characterized in that... The bottom surface of the blade body (1) is a polished flat surface.

10. The construction tool blade structure with directional adaptive deformation capability according to claim 1, characterized in that... When only the first side working part (12) is used as the working surface, the second side working part (13) is provided with rounded corner structures at both ends in its length direction.

Images