Trowel for wall construction
By designing a double-toothed working surface and multi-dimensional scale lines on the trowel, the problems of inaccurate thickness control and poor adaptability of traditional trowels are solved, achieving high-precision insulation layer construction and improving construction efficiency. It is suitable for aerogel insulation layers and other coating scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 安徽科昂新材料科技有限公司
- Filing Date
- 2025-07-10
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional trowels lack precise markings and adaptability, leading to ineffective control of insulation layer thickness, low construction efficiency, difficulty in meeting different thickness requirements, and impact on construction quality and cost.
A trowel with a double-toothed working surface and multi-dimensional scale has been designed, including a trowel body with different tooth groove depths on the first and second toothed working surfaces. Combined with laser-engraved millimeter-level scale lines, it supports quick replacement of trowel bodies with various tooth depths and an adjustable shank, ensuring construction accuracy and convenience.
It achieves insulation layer thickness error control within ±0.5mm, reduces construction difficulty and cost, and improves construction efficiency and quality, and is suitable for aerogel insulation layers and other coating scenarios.
Smart Images
Figure CN224281887U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of trowel technology, specifically a trowel used for wall construction. Background Technology
[0002] In the construction of aerogel wall insulation, precisely controlling the thickness of the insulation layer is crucial to ensuring insulation effectiveness and project quality. However, most trowels currently available on the market are of traditional structural design. In high-precision coating scenarios such as aerogel wall insulation construction, the technical shortcomings of traditional trowels significantly restrict construction quality and efficiency. Specific problems are as follows:
[0003] 1. The lack of graduated markings leads to ineffective thickness control and a significant reduction in thermal insulation performance.
[0004] Traditional trowels lack precise graduations, and construction workers can only control the thickness of the insulation layer based on experience. The actual deviation is often more than ±2mm, which far exceeds the accuracy requirement of ±0.5mm for aerogel insulation layers.
[0005] 2. The single-tooth working surface has poor adaptability and low construction efficiency.
[0006] Traditional trowels have only a single-sided toothed design, which cannot meet the needs of different thicknesses. When changing the thickness, the entire tool needs to be replaced, which is time-consuming and delays the actual construction efficiency.
[0007] In summary, traditional trowels lack specific graduations, making it difficult to meet the diverse thickness requirements commonly encountered in actual construction. They also make it inconvenient to control the construction length and width, easily leading to uneven insulation layer thickness, which in turn affects the overall performance and quality of the insulation layer, and increases construction difficulty and cost. Therefore, this application proposes a graduated trowel for wall construction. Utility Model Content
[0008] To address the technical problems existing in the background art, this utility model proposes a trowel for wall construction.
[0009] This utility model proposes a trowel for wall construction, comprising a trowel body and a trowel handle connected by a connecting rod. The two long sides of the trowel body have a first toothed working surface and a second toothed working surface, respectively, and the groove depths of the first toothed working surface and the second toothed working surface are not equal. The upper surface of the trowel body has a first scale line and a second scale line, and the first scale line and the second scale line correspond to the long side and the short side of the trowel body, respectively. The side edge of the trowel body has a third scale line.
[0010] To address the issues of traditional trowels lacking graduations and difficulty in controlling the thickness of the insulation layer, this design achieves graded coating through a double-toothed working surface. The groove depth of the first toothed working surface is 5mm, and the depth of the second toothed working surface is 8mm, which can directly coat insulation layers of different thicknesses (such as 5mm and 8mm) and avoid uneven thickness caused by repeated coating.
[0011] Long serrated sides are suitable for thicker or more viscous materials (such as thick-paste tile adhesive). Deeper grooves can create deeper trenches, ensuring that the adhesive fully adheres to the substrate and reducing the risk of hollow spots. Short serrated sides are suitable for thin-coat or more fluid materials (such as thin-layer adhesives). Shallow grooves can precisely control the amount of adhesive, preventing the material from being too thick and causing overflow or uneven drying.
[0012] The first scale line is distributed along the long side and is used to control the construction length. The second scale line is distributed along the short side and is used to control the construction width. The third scale line is located on the side edge and is used to judge the insertion depth of the tooth when constructing vertically. The three work together to control the thickness error of the insulation layer within ±0.5mm, which greatly improves the accuracy compared with the traditional process.
[0013] As a further optimization of this utility model, the second scale line, the third scale line, and the fixing base are all laser-engraved millimeter-level scale lines;
[0014] Laser-engraved graduation lines are wear-resistant and clear, and will not fade over long-term use. They are suitable for dusty environments on construction sites. Millimeter-level precision meets the stringent construction requirements of aerogel insulation layers, avoiding rework caused by blurry graduations.
[0015] As a further optimization of this utility model, the third scale line is set on the inner wall of the tooth groove of the first tooth working surface and the second tooth working surface and is vertically distributed along the height direction of the cutter body.
[0016] When constructing a facade wall, the vertically distributed third scale line allows for real-time adjustment of the scraping force by observing the relative position of the scale line within the groove and the insulation layer, ensuring uniform thickness. For example, when a thickness of mm is required, the construction worker can confirm the insertion depth of the teeth through the third scale line to avoid insufficient thickness due to viewing angle deviation.
[0017] As a further optimized solution of this utility model, one end of the connecting rod is connected to the knife handle, and the other end of the connecting rod is detachably installed with a fixed seat. A connecting plate is installed in the middle of the upper end face of the knife body, and the connecting plate is inserted and assembled with the fixed seat and locked by fasteners.
[0018] The fixed base and the connecting plate are connected by plug-in and bolt locking, which can shorten the time required to replace the trowel. It supports one trowel to be paired with multiple trowels with different tooth depths (such as 5mm, 8mm, 10mm), reducing tool procurement costs by 50%. For example, when the construction requirements are changed from 5mm insulation layer to 8mm, there is no need to replace the whole trowel. Only the connecting plate (10) needs to be removed to replace the trowel.
[0019] As a further optimization of this utility model, the fixed base (9) is provided with a slot that is compatible with the connecting plate (10), the connecting plate (10) is inserted into the slot and fastened by bolts located on the side of the fixed base (9);
[0020] The fit tolerance between the slot and the connecting plate is H7 / g6, ensuring that the coaxiality error between the blade body (1) and the handle is <0.5mm after installation, avoiding uneven scraping force caused by eccentricity. The side bolt fastening design facilitates one-handed operation.
[0021] As a further optimization of this utility model, the number of connecting plates is three. The three connecting plates are respectively inserted into the two ends and the middle of the fixing base, which can improve the torsional rigidity of the blade body after installation and prevent the blade body from shaking during scraping.
[0022] As a further optimized solution of this utility model, a threaded post is installed at the end of the connecting rod away from the tool holder, and a threaded hole adapted to the threaded post is opened on the upper end face of the fixing seat. The threaded post is threadedly connected to the threaded hole, and the lower end face of the connecting rod is in contact with the upper end face of the fixing seat.
[0023] The double fixation of threaded connection and end face fit can improve the connection strength between the connecting rod and the fixed seat, and can withstand the reaction force of high-intensity scraping operation. When scraping thick layer of thermal insulation material, the engagement of threaded post and threaded hole can prevent the connecting rod from loosening and ensure construction safety.
[0024] As a further optimized solution of this utility model, one end of the knife handle is a gripping end, the other end of the knife handle is a fixed end and the bottom is connected to the connecting rod, and the fixed end of the knife handle is slidably fitted with an extension part that is coaxially aligned.
[0025] The extension part slides to the handle to extend and retract the length, adapting to the gripping habits of construction workers of different heights, avoiding uneven force application caused by short arms, and improving construction comfort.
[0026] As a further optimized solution of this utility model, the fixed end of the knife handle is provided with a centrally located sliding cavity. The sliding cavity has an opening and a connecting rod is slidably fitted thereon. One end of the connecting rod extends into the sliding cavity and is fitted with a slider. The outer diameter of the slider is larger than the inner diameter of the opening and is slidably connected to the inner wall of the sliding cavity. The other end of the connecting rod extends to the outside of the sliding cavity and is fixed to the extension.
[0027] The clearance fit between the slider and the sliding cavity allows the extension to extend and retract smoothly. At the same time, the outer diameter of the slider is larger than the inner diameter of the opening (20mm) to prevent it from falling off. This structure can withstand strong axial tensile force, preventing the extension from falling off due to accidental pulling and ensuring construction safety.
[0028] The trowel for wall construction proposed in this utility model has the following beneficial effects:
[0029] By setting a first toothed working surface and a second toothed working surface with different tooth groove depths on both sides of the blade, insulation layers of different thicknesses can be directly scraped out with different tooth groove depths, avoiding repeated application. In conjunction with the first and second scale lines on the upper surface of the blade, the actual application length and width can be controlled, thereby better controlling the application range. The third scale line at the side edge makes it easy to grasp the actual application thickness, improve the uniformity of the insulation layer thickness, thereby improving the overall performance and project quality of the insulation layer, and reducing construction difficulty and cost.
[0030] (ii) The third scale line is set on the inner wall of the tooth groove and distributed along the height direction of the cutter body, which makes it easy to intuitively judge the depth of the tooth insertion into the insulation layer during construction, and is especially suitable for vertical wall construction;
[0031] (iii) The connecting rod is detachably connected to the fixed seat via a threaded post. The connecting plate of the blade body is inserted into the slot of the fixed seat and fastened with bolts. The blade body can be quickly replaced, allowing one blade holder to be used with multiple blade bodies, reducing the cost of use. Replacing the blade body with different tooth depths can adapt to the needs of various thicknesses of insulation layers without the need for additional tools, thus improving the convenience of actual operation.
[0032] (iv) The fixed end of the handle is slidably connected to the extension part via a connecting rod, allowing the handle length to be adjusted according to the construction height, adapting to construction workers of different heights and high-altitude work scenarios. The appropriate extension also facilitates centering the grip for some workers, improving their comfort. The handle gripping end is made of non-slip rubber, effectively improving grip strength and preventing fatigue from prolonged construction.
[0033] (v) In addition to aerogel insulation construction, the double-toothed working surface and scale design of this trowel can also be used for putty application and mortar leveling. It is highly practical, has broad market prospects, and is conducive to promotion and use.
[0034] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0035] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;
[0036] Figure 2This is a second-view perspective three-dimensional structural diagram of the present invention;
[0037] Figure 3 This is a top view of the structure of this utility model;
[0038] Figure 4 This is a front cross-sectional view of the present invention.
[0039] Figure descriptions: 1. Tool body; 2. Tool holder; 3. Connecting rod; 4. First toothed working surface; 5. Second toothed working surface; 6. First scale line; 7. Second scale line; 8. Third scale line; 9. Fixed base; 10. Connecting plate; 11. Extension part; 12. Connecting rod; 13. Threaded column. Detailed Implementation
[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0041] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0042] In the field of wall construction, traditional trowels, lacking precise scales and adjustable structures, struggle to meet the thickness control requirements of delicate construction processes such as aerogel insulation layers, often resulting in uneven insulation layer thickness and low construction efficiency. The trowel provided by this invention, through its innovative double-toothed working surface and multi-dimensional scale design, combined with a detachable blade body and a retractable handle, achieves a dual improvement in construction accuracy and ease of operation. Its specific implementation is as follows:
[0043] like Figures 1-3 As shown, the trowel consists of a blade body 1, a connecting rod 3, and a handle 2 forming a three-dimensional collaborative structure. The long sides of the blade body 1 are respectively provided with a first toothed working surface 4 and a second toothed working surface 5, with tooth groove depths of 5mm and 8mm respectively. It can directly scrape out the corresponding thickness of the insulation layer, avoiding the material accumulation or insufficient thickness caused by traditional repeated coating.
[0044] The upper surface of the blade body 1 is laser-engraved with millimeter-level scale lines: the first scale line 6 distributed along the long side is used to control the construction length, the second scale line 7 in the short side direction defines the construction width, and the third scale line 8 at the side edge is vertically distributed on the inner wall of the tooth groove. This allows for precise control of the tooth insertion depth by observing the relative position of the scale lines and the material surface during vertical construction, so that the thickness error of the insulation layer is controlled within ±0.5mm.
[0045] like Figure 4 As shown, one end of the connecting rod 3 is fixed to the handle 2, and the other end of the connecting rod 3 is connected to the fixed seat 9 through the threaded post 13. The fixed seat 9 has slots that are compatible with the connecting plate 10 of the blade body 1. The three connecting plates 10 are respectively inserted into the two ends and the middle of the fixed seat 9 and locked by the side bolts to form a connection structure with strong torsional rigidity, ensuring that the blade body 1 is stable and does not shake when scraping.
[0046] This design supports a single tool holder 2 with multiple tooth depths of tool bodies, such as 5mm, 8mm, and 10mm, reducing tool procurement costs by 50%. When changing tool bodies, disassembly can be completed simply by loosening the bolts, enabling switching between different thickness construction needs.
[0047] Specifically, the grip end of the handle 2 is made of non-slip rubber material, such as... Figure 4 As shown, the fixed end of the handle 2 is connected to the extension part 11 through the sliding cavity. One end of the connecting rod 12 in the sliding cavity is fixed to the slider, and the other end is connected to the extension part 11. The outer diameter of the slider is larger than the inner diameter of the opening of the sliding cavity, ensuring that the extension and retraction are smooth and do not fall off. Construction workers can extend the length of the handle according to their height or working height to avoid force deviation caused by insufficient arm extension. It is especially suitable for high-altitude or vertical wall construction. For example, in the wall insulation construction at a height of 2.5 meters, by extending the handle 2, the construction workers can maintain a natural standing posture and reduce the risk of lumbar strain.
[0048] During actual construction, workers select the working surface with the corresponding tooth depth according to the design requirements—5mm tooth depth for thin-layer insulation and 8mm tooth depth for thick-layer construction. The third scale line 8 on the side edge of the blade body 1 helps to confirm the insertion depth and ensure that the thickness of each scraping layer is consistent. The construction area is marked on the wall by the first scale line 6 and the second scale line 7. For example, when constructing a 3m × 2m wall in sections, the scale lines are used to divide the wall into a 0.5m × 0.5m grid to ensure that the thickness and area of the insulation layer in each area are accurately controllable.
[0049] When it is necessary to change the thickness of the insulation layer, simply loosen the bolts on the side of the fixing seat 9, pull out the old blade 1 and insert the new blade 1, and tighten the bolts to complete the replacement.
[0050] In one embodiment, in a commercial building exterior wall insulation project, the aerogel insulation layer applied using this trowel showed that the thickness uniformity compliance rate increased from 72% with traditional methods to 98%, and the rework rate decreased by 80%. Besides aerogel application, its double-toothed working surface and graduation system can also be used for putty application and mortar leveling—8mm tooth depth is suitable for rough leveling, and 5mm tooth depth is for fine finishing, achieving "one tool for multiple scenarios." Furthermore, the laser-engraved graduation lines remain clear even in dusty environments, maintaining millimeter-level accuracy after 300 applications, meeting the requirements for long-term repeated use.
[0051] This utility model, through the deep integration of mechanical structure and functional design, transforms wall construction from experience-based to precise control, providing an innovative tool-level solution for building energy conservation projects. It achieves a dual improvement in construction efficiency and project quality, and has significant industry promotion value.
[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A trowel for wall construction, comprising a trowel body (1) and a trowel handle (2) connected by a connecting rod (3), characterized in that, The two long sides of the blade (1) have a first toothed working surface (4) and a second toothed working surface (5) respectively, and the tooth groove depths of the first toothed working surface (4) and the second toothed working surface (5) are not equal. The upper surface of the blade (1) has a first scale line (6) and a second scale line (7), and the first scale line (6) and the second scale line (7) correspond to the long side and the short side of the blade (1) respectively. The side edge of the blade (1) has a third scale line (8).
2. The trowel for wall construction according to claim 1, characterized in that, The second scale line (7), the third scale line (8), and the fixing base (9) are all laser-engraved millimeter-level scale lines.
3. The trowel for wall construction according to claim 1, characterized in that, The third scale line (8) is set on the inner wall of the tooth groove of the first tooth working surface (4) and the second tooth working surface (5) and is vertically distributed along the height direction of the cutter body (1).
4. A trowel for wall construction according to claim 1, characterized in that, One end of the connecting rod (3) is connected to the handle (2), and the other end of the connecting rod (3) is detachably mounted with a fixed seat (9). A connecting plate (10) is installed in the middle of the upper end face of the blade body (1), and the connecting plate (10) is inserted into the fixed seat (9) and locked by fasteners.
5. A trowel for wall construction according to claim 4, characterized in that, The mounting base (9) has a slot that is compatible with the connecting plate (10). The connecting plate (10) is inserted into the slot and fastened by bolts located on the side of the mounting base (9).
6. A trowel for wall construction according to claim 4, characterized in that, There are three connecting plates (10), which are respectively inserted into the two ends and the middle of the fixed base (9).
7. A trowel for wall construction according to claim 4, characterized in that, A threaded post (13) is installed at the end of the connecting rod (3) away from the tool holder (2). A threaded hole that matches the threaded post (13) is opened on the upper end face of the fixed seat (9). The threaded post (13) is threadedly connected to the threaded hole, and the lower end face of the connecting rod (3) is in contact with the upper end face of the fixed seat (9).
8. A trowel for wall construction according to claim 1, characterized in that, One end of the handle (2) is the gripping end, and the other end of the handle (2) is the fixed end and the bottom is connected to the connecting rod (3). The fixed end of the handle (2) is slidably fitted with an extension part (11) that is coaxially aligned.
9. A trowel for wall construction according to claim 8, characterized in that, The fixed end of the handle (2) has a centrally located sliding cavity. The sliding cavity has an opening and a connecting rod (12) is slidably fitted thereon. One end of the connecting rod (12) extends into the sliding cavity and is fitted with a slider. The outer diameter of the slider is larger than the inner diameter of the opening and is slidably connected to the inner wall of the sliding cavity. The other end of the connecting rod (12) extends to the outside of the sliding cavity and is fixed to the extension (11).