A handheld self-leveling thickness regulating screed

Abstract

The utility model discloses a handheld self -leveling thickness adjusting squeegee belongs to squeegee technical field, including the squeegee head subassembly of holding lever and with holding lever connection, the squeegee head subassembly includes main squeegee and two symmetrical settings in the length direction both sides of auxiliary squeegee of main squeegee, the lower edge of main squeegee and auxiliary squeegee all is equipped with the squeegee tooth part for controlling the thickness of self -leveling material, the driving sleeve of being slidable along its axial direction is sheathed on the holding lever, and the driving sleeve is connected with the linkage between two auxiliary squeegees, the quick locking structure for locking driving sleeve in different axial position is still equipped on the holding lever. This handheld self -leveling thickness adjusting squeegee, through bilateral auxiliary squeegee synchronous telescoping, has realized the flexible regulation of total work width, through the simple action of pressing - rotating - releasing, can complete locking, and operator can complete in several seconds, has realized the instant, seamless switching of different width range in construction flow operation.

Description

Technical Field

[0001] This utility model belongs to the field of scraper technology, and in particular relates to a handheld self-leveling thickness adjustable scraper. Background Technology

[0002] Self-leveling flooring construction is a crucial step in modern building decoration, and its quality and efficiency highly depend on the effectiveness of the construction tools. In this process, workers need to use scrapers to spread and level the liquid slurry poured onto the ground to form a smooth base layer of a specified thickness. The construction site environment is complex and varied, ranging from spacious living and dining rooms to narrow corridors and bathrooms, which places drastically different demands on the working width of the scraper.

[0003] Currently, the industry generally uses fixed-length T-shaped scrapers, which have inherent drawbacks when dealing with the above-mentioned varied scenarios: in wide areas, the coverage of a single scraper with a fixed length is limited, which requires workers to repeat the work multiple times, resulting in low efficiency and easy to produce seam marks; in narrow areas, an excessively long scraper is difficult to rotate, which hinders construction.

[0004] To overcome the limitations of fixed-length scrapers, Chinese utility model patent CN222879165U discloses a gypsum-based self-leveling scraping device. This device uses a limiting bolt to connect the main and auxiliary scrapers, achieving limited length adjustment. However, this technology still has two core problems:

[0005] First, its length adjustment is two-stage, with only two fixed states: "main scraper" and "main scraper plus auxiliary scraper". It cannot provide more and more refined intermediate width options, making it difficult to accurately match all construction scenarios.

[0006] Secondly, the adjustment process relies on the disassembly and assembly of tools and manual alignment, which is cumbersome and time-consuming. It cannot achieve a quick and seamless switch in the scraping process, which essentially disrupts the continuity of construction.

[0007] To address this issue, we propose a handheld self-leveling thickness adjustment scraper. Utility Model Content

[0008] The purpose of this invention is to solve the problem that existing scrapers are difficult to accurately match all construction scenarios, and to propose a handheld self-leveling thickness adjustable scraper.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A handheld self-leveling thickness adjustment scraper includes a handle and a scraper head assembly connected to the handle. The scraper head assembly includes a main scraper and two auxiliary scrapers symmetrically arranged on both sides of the main scraper along its length. The auxiliary scrapers are slidably connected to the main scraper and can extend or retract relative to the main scraper to change the total working width of the scraper head assembly.

[0011] The lower edges of both the main scraper and the auxiliary scraper are provided with scraping teeth for controlling the thickness of the self-leveling material.

[0012] The handle is fitted with a drive sleeve that can slide along its axis. The drive sleeve is connected to the two auxiliary scrapers by a linkage mechanism. By moving the drive sleeve axially, the two auxiliary scrapers are driven to move synchronously in opposite directions, thereby realizing multi-level adjustment of the total working width.

[0013] The grip is also equipped with a quick-locking structure for locking the drive sleeve in different axial positions.

[0014] Preferably, the scraping tooth part includes a base plate fixed to the lower edge of the main scraper and the auxiliary scraper. A scraping tooth plate is attached to the side of the base plate. A longitudinal groove is opened on the scraping tooth plate. A quick-release bolt is provided in the groove to change the vertical height of the scraping tooth plate relative to the base plate and to fix it.

[0015] Preferably, the main scraper has a U-shaped cross-section to form a receiving groove, and the two auxiliary scrapers are located in the receiving groove; the auxiliary scrapers are provided with guide grooves extending along their sliding direction, and the main scraper is provided with guide blocks that cooperate with the guide grooves.

[0016] Preferably, the linkage mechanism includes a mounting sleeve rotatably sleeved on the drive sleeve, a first connecting part mounted on the auxiliary scraper, a second connecting part mounted on the side wall of the mounting sleeve, and a transmission connecting rod hinged between the first connecting part and the second connecting part.

[0017] Preferably, the quick-locking structure includes a cavity disposed inside the grip, a locking pin partially extending into the cavity is provided at the bottom of the drive sleeve, and a gasket located inside the cavity is connected between the two locking pins;

[0018] The sidewall of the cavity is provided with a guide port for the locking pin to pass through along the axial direction, and a plurality of positioning grooves communicating with the guide port are evenly distributed along the axial direction of the grip.

[0019] The cavity is provided with an elastic element that abuts against the gasket. By overcoming the force of the elastic element and pressing axially and rotating the drive sleeve, the locking pin can move along the guide port and disengage from and engage with the positioning groove.

[0020] Preferably, the end of the positioning groove is provided with a recess for enhancing the locking effect.

[0021] In summary, the technical effects and advantages of this utility model are as follows:

[0022] This utility model achieves flexible adjustment of the total working width by using an axial sliding drive sleeve and a linkage mechanism to drive the synchronous extension and retraction of the double-sided auxiliary scrapers. The key is that the quick-locking structure, in conjunction with multiple axially evenly distributed positioning grooves, provides multiple reliable, preset width levels, allowing operators to select from multiple width levels according to the actual construction space, accurately matching different working surfaces from open to narrow, thus achieving multi-purpose use of one plate.

[0023] This invention utilizes the restoring force of an elastic element to quickly engage the locking pin into the recessed portion at the end of different positioning grooves through a simple pressing-rotating-releasing action. This process requires no tools and can be completed by the operator within seconds, enabling instant and seamless switching between different width settings in construction workflow. It fundamentally solves the problem of traditional adjustable scrapers interrupting the construction rhythm due to cumbersome adjustments, and greatly improves overall work efficiency.

[0024] This invention achieves multi-level width adjustment while retaining an independent scraper height adjustment function. By loosening the quick-release bolts and adjusting the position of the scraper through the longitudinal groove, the coating thickness can be precisely controlled. The independent and convenient adjustment of width and thickness can meet the requirements of various complex construction processes. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0026] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the scraper assembly in this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the driving sleeve and the mounting sleeve in this utility model;

[0029] Figure 5 This is a schematic diagram of the quick-locking structure in this utility model.

[0030] In the diagram: 1. Main scraper; 11. Guide block; 2. Secondary scraper; 21. Guide groove; 3. Scraper tooth; 31. Base plate; 32. Scraper tooth plate; 33. Quick-release bolt; 4. Drive sleeve; 41. Locking pin; 42. Washer; 43. Elastic element; 5. Mounting sleeve; 51. Second connecting part; 6. Linkage mechanism; 61. First connecting part; 62. Transmission link; 7. Quick-locking structure; 10. Grip bar; 101. Recess; 102. Guide port; 103. Positioning groove. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0032] Reference Figure 1-3 A handheld self-leveling thickness-adjustable scraper includes a handle 10 and a scraper head assembly connected to the handle 10. The scraper head assembly, as the core component that directly performs the scraping operation, adopts an expandable structure. The scraper head assembly includes a main scraper 1 and two auxiliary scraper blades 2 symmetrically arranged on both sides of the main scraper 1 along its length. In order to achieve flexible changes in the total working width of the scraper, both auxiliary scraper blades 2 are slidably connected to the main scraper 1 and can extend or retract relative to the main scraper 1 to change the total working width of the scraper head assembly. Specifically, the cross-section of the main scraper 1 is designed as a U-shape, thus naturally forming an accommodating groove inside it. The two auxiliary scraper blades 2 are precisely accommodated in this accommodating groove, ensuring the compactness of the component and providing stable guidance and protection for the sliding of the auxiliary scraper blades 2.

[0033] To ensure that the auxiliary scraper 2 moves smoothly and without tilting during the extension and retraction process, a transverse guide groove 21 is provided on each auxiliary scraper 2 along its sliding direction. Correspondingly, a guide block 11 that matches the shape and size of the upper guide groove 21 is provided on the inner wall of the main scraper 1 facing the inside of the receiving groove. The guide block 11 is embedded in the guide groove 21, and the two form a sliding fit, so that the auxiliary scraper 2 can only move in a straight line strictly along the length direction of the main scraper 1, effectively preventing it from twisting or getting stuck when under force, and laying a solid structural foundation for achieving a uniform and smooth scraping effect in the future.

[0034] Reference Figure 1-3 Below the scraper assembly, a scraper tooth section 3 is provided for controlling the thickness of the self-leveling mortar. The scraper tooth section 3 is also located on the lower edge of the main scraper 1 and the two auxiliary scraper 2, ensuring that the scraping function is continuous and complete throughout the entire adjustment width range. The scraper tooth section 3 includes a base plate 31 fixed to the lower edge of the main scraper 1 and the auxiliary scraper 2. A scraper tooth plate 32 is attached to the side of the base plate 31. The scraper tooth plate 32 has a longitudinal (i.e., perpendicular to the ground) long strip groove and is equipped with a quick-release bolt 33 passing through the groove. When the quick-release bolt 33 is tightened, the scraper tooth plate 32 is fastened to the base plate 31. When the quick-release bolt 33 is loosened, the operator can move the scraper tooth plate 32 up and down to change the vertical height of its cutting edge relative to the lower edge of the base plate 31, so that the construction personnel can make precise fine adjustments to the scraping depth according to the design thickness requirements, improving the precision and adaptability of the construction.

[0035] To enable simultaneous adjustment of the extension of the two auxiliary scrapers 2 during construction, a drive sleeve 4 that can slide along its axial direction is fitted on the handle 10. The operator directly holds and moves this drive sleeve 4. In order to convert the linear motion of the drive sleeve 4 into the synchronous and opposite linear motion of the two auxiliary scrapers 2, a linkage mechanism 6 is connected between the drive sleeve 4 and the two auxiliary scrapers 2. By moving the drive sleeve 4 axially, the two auxiliary scrapers 2 are driven to move synchronously and oppositely, so as to realize the multi-level adjustment of the total working width.

[0036] Reference Figure 2-5 The linkage mechanism 6 includes a mounting sleeve 5 rotatably sleeved outside the drive sleeve 4. Two second connecting parts 51 are symmetrically mounted on the side wall of the mounting sleeve 5. Simultaneously, first connecting parts 61 are respectively mounted on the upper surfaces of the two auxiliary scrapers 2. A transmission link 62 is hinged between the first connecting part 61 and the second connecting part 51. When the drive sleeve 4 is moved up and down, it drives the mounting sleeve 5 to move synchronously. The mounting sleeve 5 pushes or pulls the two auxiliary scrapers 2 respectively through the two transmission links 62. Due to the constraint of the transmission links 62, the two auxiliary scrapers 2 will inevitably achieve equidistant and opposite synchronous movements, thereby smoothly changing the total working width of the scraper assembly.

[0037] In order to maintain the adjusted width stably to accommodate continuous scraping operations, the handle 10 is also provided with a quick-locking structure 7 for locking the drive sleeve 4 in different axial positions.

[0038] Reference Figure 2-5 The quick-locking structure 7 includes a cavity disposed inside the grip 10. The bottom of the drive sleeve 4 extends downward and is provided with at least one locking pin 41 that extends laterally through its wall and partially into the cavity. In this embodiment, it is preferable to provide two locking pins 41, which are connected to each other in the cavity by a gasket 42, which can enhance the integrity of the structure and the uniformity of force distribution. A guide port 102 is provided on the side wall of the cavity along the axial direction. The end of the locking pin 41 passes through this guide port 102, so that the axial movement and rotation of the drive sleeve 4 can be transmitted.

[0039] To achieve multi-level positioning, multiple positioning grooves 103 communicating with the guide port 102 are evenly distributed axially on the side wall of the cavity. The positioning grooves 103 extend circumferentially around the handle 10. An elastic element 43 is also provided inside the cavity; in this embodiment, a compression spring is used. One end of the elastic element 43 abuts against the bottom of the cavity, and the other end abuts against the pad 42 connected to the locking pin 41. In its natural state, the elastic force of the elastic element 43 pushes the pad 42 and the locking pin 41 upwards. When adjustment is required, the operator first overcomes the spring force and presses down on the drive sleeve 4. Rotate to allow the locking pin 41 to exit from the current positioning slot 103 into the guide port 102; then, while maintaining the pressing state, move the locking pin 41 within the guide port 102 to align with the next target positioning slot 103; finally, rotate the drive sleeve 4 to allow the locking pin 41 to enter the new positioning slot 103. To further enhance the stability and feel of the locking, a recess 101 is provided at the top end of each positioning slot 103. When the locking pin 41 is engaged, it will partially fall into this recess 101, which can effectively prevent accidental disengagement under vibration or slight external force.

[0040] Working principle:

[0041] When the construction worker needs to adjust the scraper width according to the size of the working surface, the operator holds the drive sleeve 4 with one hand and applies an axial pressing force to overcome the elastic force of the elastic element 43 inside the quick-locking structure 7, causing the drive sleeve 4 and the locking pin 41 to move downwards a short distance, thereby disengaging the locking pin 41 from the recess 101 at the end of the current positioning groove 103. Then, the drive sleeve 4 is rotated to make the locking pin 41 exit from the current positioning groove 103 into the guide port 102. By pressing the drive sleeve 4, the locking pin 41 is driven to slide in the guide port 102 until it is aligned with the entrance of another positioning groove 103 corresponding to the target width. At this time, the drive sleeve 4 is rotated to make the locking pin 41 enter the new positioning groove 103. Under the restoring force of the elastic element 43, the locking pin 41 will automatically spring upwards into the new positioning groove 103 and finally lock into the recess 101 at its end, completing one width setting switch and locking.

[0042] During the entire process of pressing and moving the drive sleeve 4, the axial movement of the drive sleeve 4 drives the mounting sleeve 5 outside it to move synchronously. The mounting sleeve 5 then drives the two transmission rods 62 to move through the second connecting parts 51 on both sides. The other end of the transmission rods 62 is hinged to the auxiliary scraper 2 through the first connecting part 61, thereby converting the up-and-down linear movement of the mounting sleeve 5 into a pushing and pulling action on the two auxiliary scrapers 2. Due to the symmetrical design of the linkage mechanism, the two auxiliary scrapers 2 are forced to perform synchronous linear movements at equal distances and in opposite directions, thereby smoothly extending out of the main scraper 1 or retracting into its receiving groove, realizing multi-level changes in the total working width of the scraper assembly. This adjustment process does not require tools and can be completed quickly during the scraping interval, greatly ensuring the continuity and efficiency of construction.

[0043] According to the thickness requirements of the self-leveling construction, the construction personnel can make a fine adjustment of the height of the toothed scraper 32 and loosen each quick-release bolt 33. At this time, the toothed scraper 32 can move up and down relative to the base plate 31 along its longitudinal groove. After adjusting the cutting edge of the toothed scraper 32 to the required height, the quick-release bolts 33 can be tightened again to fix it firmly. It can adapt to a variety of different construction thickness requirements, improving the versatility of the tool and the accuracy of construction.

Claims

1. A handheld self-leveling thickness-adjusting scraper, comprising a handle (10) and a scraper head assembly connected to the handle (10), characterized in that: The scraper assembly includes a main scraper (1) and two auxiliary scrapers (2) symmetrically arranged on both sides of the main scraper (1) along its length. The auxiliary scrapers (2) are slidably connected to the main scraper (1) and can extend or retract relative to the main scraper (1) to change the total working width of the scraper assembly. The lower edges of the main scraper (1) and the auxiliary scrapers (2) are provided with scraping teeth (3) for controlling the thickness of the self-leveling material. The grip (10) is fitted with a drive sleeve (4) that can slide along its axial direction. The drive sleeve (4) is connected to the two auxiliary scrapers (2) by a linkage mechanism (6). By moving the drive sleeve (4) axially, the two auxiliary scrapers (2) are driven to move synchronously in opposite directions to achieve multi-level adjustment of the total working width. The grip (10) is also provided with a quick-locking structure (7) for locking the drive sleeve (4) in different axial positions.

2. The handheld self-leveling thickness adjusting scraper according to claim 1, characterized in that, The scraper tooth part (3) includes a base plate (31) fixed to the lower edge of the main scraper (1) and the auxiliary scraper (2). A scraper tooth plate (32) is attached to the side of the base plate (31). A longitudinal groove is provided on the scraper tooth plate (32). A quick-release bolt (33) is provided in the groove to change the vertical height of the scraper tooth plate (32) relative to the base plate (31) and fix it.

3. A handheld self-leveling thickness adjusting scraper according to claim 1 or 2, characterized in that, The main scraper (1) has a U-shaped cross section to form a receiving groove, and the two auxiliary scrapers (2) are located in the receiving groove; the auxiliary scrapers (2) are provided with guide grooves (21) extending along their sliding direction, and the main scraper (1) is provided with guide blocks (11) that cooperate with the guide grooves (21).

4. A handheld self-leveling thickness adjusting scraper according to claim 1, characterized in that, The linkage mechanism (6) includes a mounting sleeve (5) rotatably sleeved on the drive sleeve (4), a first connecting part (61) installed on the auxiliary scraper (2), a second connecting part (51) installed on the side wall of the mounting sleeve (5), and a transmission link (62) hinged between the first connecting part (61) and the second connecting part (51).

5. A handheld self-leveling thickness adjusting scraper according to claim 1, characterized in that, The quick-locking structure (7) includes a cavity disposed inside the grip (10), and the bottom of the drive sleeve (4) is provided with a locking pin (41) that partially extends into the cavity, and a gasket (42) located inside the cavity is connected between the two locking pins (41). The sidewall of the cavity is provided with a guide port (102) for the locking pin (41) to pass through along the axial direction, and a plurality of positioning grooves (103) communicating with the guide port (102) are evenly distributed along the axial direction of the grip (10). The cavity is provided with an elastic element (43) that abuts against the gasket (42). By overcoming the force of the elastic element (43) and pressing axially and rotating the drive sleeve (4), the locking pin (41) can move along the guide port (102) and disengage from and engage with the positioning groove (103).

6. A handheld self-leveling thickness adjusting scraper according to claim 5, characterized in that, The end of the positioning groove (103) is provided with a recess (101) to enhance the locking effect.

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