A concrete screeding device for use in building construction

Abstract

The utility model relates to a concrete scraping device for building construction and belongs to the technical field of concrete scraping tools, which comprises a scraper plate and a handle. The scraper plate is provided with a hinged plate. One side of the hinged plate is provided with a locking ring. The end surface of the locking ring is provided with a locking groove. One end of the handle is provided with a connecting rod. The free end of the connecting rod is provided with a connecting part. The connecting part is uniformly and interval provided with locking blocks around a second hinged hole. A connecting shaft is arranged in the first hinged hole and the second hinged hole to connect the connecting rod and the hinged plate. The connecting shaft is interval provided with stop rings corresponding to the connecting rod. One end of the connecting shaft is threadedly connected with a locking nut. The application increases the locking ring and the locking block on the contact surface of the connecting rod and the hinged plate. When in use, the locking block is embedded in the locking groove of the locking ring to form locking. The handle is no longer simply locked by the friction between the contact surfaces, effectively avoiding the rotation of the handle during use, and the handle is more stable.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete leveling tools, and in particular to a concrete leveling device for building construction. Background Technology

[0002] During building floor construction, after concrete is laid on the ground, it needs to be leveled. Currently, this is mainly done manually using a T-shaped screed. Various screeds are similar, but their main structure is basically the same. A screed mainly consists of a scraper and a handle, with the scraper and handle connected perpendicularly. To level, the operator manually operates the handle, pushing and pulling the scraper to achieve the desired leveling of the concrete.

[0003] Since the angle between the handle and the main body cannot be changed, and the scraper must be kept parallel to the concrete surface while leveling, there is a significant difference in operating comfort when workers of different heights use the same scraper to level the surface.

[0004] To address the aforementioned technical issues, some existing solutions involve hinged scrapers to handles and secured with bolts and nuts, allowing for adjustable handle tilt angles to facilitate use by staff of different heights.

[0005] However, locking the handle with a bolt and nut structure is not stable. When the nut loosens or when a large force is needed to drag the scraper, the handle will rotate relative to the handle, which will change the tilt angle of the handle and affect the use of the scraper. Utility Model Content

[0006] To solve or partially solve the problems existing in related technologies, this utility model provides a concrete leveling device for building construction, aiming to avoid the technical problem of the hinge position between the handle of the leveling ruler and the scraper becoming loose during use.

[0007] The above-mentioned concrete leveling device for building construction includes a scraper and a handle. The scraper is provided with a hinge plate and a first hinge hole. There are three hinge plates, which are evenly spaced along the length of the scraper, and the middle hinge plate is located in the middle of the scraper.

[0008] A locking ring is provided on one side of the hinge plate. The locking ring is coaxially arranged with the first hinge hole. Locking grooves are evenly spaced around the end face of the locking ring in the circumferential direction.

[0009] One end of the handle is provided with three connecting rods, and the connecting rods are arranged one-to-one with the hinge plate;

[0010] The free end of the connecting rod is provided with a connecting part, the connecting part is provided with a second hinge hole, and locking blocks are evenly spaced around the second hinge hole on the connecting part, and the locking blocks are provided in a one-to-one correspondence with the locking grooves;

[0011] The connecting shaft passes through the first hinge hole and the second hinge hole, thereby hinged the connecting rod to the hinge plate;

[0012] The connecting shaft is provided with retaining rings at intervals, each corresponding to one of the connecting rods, and a locking nut is threaded onto one end of the connecting shaft.

[0013] In some designs, the leftmost retaining ring is fixed to the connecting shaft, while the other two retaining rings have pins on one side.

[0014] In some designs, the scraper is provided with an upwardly curved arc-shaped guide plate.

[0015] In some designs, the scraper is provided with two opposing angle steels, and the angle steels are provided with threaded connection holes.

[0016] In some designs, the handle is fitted with a rubber sleeve.

[0017] The technical solution provided by this utility model can include the following beneficial effects:

[0018] This application adds a locking ring and a locking block to the contact surfaces of the connecting rod and the hinge plate, respectively. When in use, the locking block is embedded in the locking groove on the locking ring to form a lock, which no longer relies solely on the friction between the contact surfaces for locking, effectively preventing the handle from rotating during use and making the handle more stable.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0021] Figure 1 This is a structural schematic diagram of a concrete leveling device shown in an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Enlarged view of point A;

[0023] Figure 3This is a partial exploded schematic diagram of the concrete leveling device shown in an embodiment of the present invention;

[0024] Figure 4 This is another structural schematic diagram of the concrete leveling device shown in this embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the scraper blade of the concrete leveling device shown in an embodiment of the present invention.

[0026] Figure label:

[0027] 1. Scraper; 11. Hinge plate; 12. First hinge hole; 13. Locking ring; 14. Locking groove; 2. Handle; 21. Connecting rod; 22. Connecting part; 23. Second hinge hole; 24. Locking block; 3. Connecting shaft; 31. Retaining ring; 32. Locking nut; 33. Pin; 4. Arc-shaped guide plate; 5. Angle steel; 51. Threaded connection hole; 6. Rubber sleeve. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the content described.

[0029] Please see Figure 1 , Figure 2 and Figure 3 This application provides a concrete leveling device for building construction, including a scraper 1 and a handle 2. The scraper 1 is made of steel plate or aluminum alloy plate, and its length and width are set as needed. The handle 2 is made of steel pipe.

[0030] The scraper 1 is provided with a hinge plate 11, and the hinge plate 11 is provided with a first hinge hole 12. There are three hinge plates 11, which are evenly spaced along the length of the scraper 1, and the middle hinge plate 11 is located in the middle of the scraper 1. The left side of the hinge plate 11 is provided with a locking ring 13, which is coaxially arranged with the first hinge hole 12. The left end face of the locking ring 13 is provided with locking grooves 14 evenly spaced around its circumference.

[0031] The lower end of the handle 2 is provided with three connecting rods 21. Specifically, the connecting rod 21 in the middle is an extension of the handle 2, and the upper ends of the connecting rods 21 on both sides are fixed to the handle 2 by welding, and the lower half is set parallel to the handle 2. The three connecting rods 21 are arranged one-to-one with the hinge plates 11. Specifically, the lower ends of the three connecting rods 21 are respectively located on the left side of the three hinge plates 11.

[0032] The lower end of the connecting rod 21 is provided with a connecting part 22, and the connecting part 22 is provided with a second hinge hole 23. The second hinge hole 23 is coaxially arranged with the first hinge hole 12. Locking blocks 24 are evenly spaced around the second hinge hole 23 on the connecting part 22, and the locking blocks 24 are arranged in a one-to-one correspondence with the locking grooves 14, so that the locking blocks 24 can be embedded in the locking grooves 14.

[0033] The connecting shaft 3 passes through the first hinge hole 12 and the second hinge hole 23, thereby hinged the connecting rod 21 to the hinge plate 11;

[0034] The connecting shaft 3 is provided with retaining rings 31 that correspond one-to-one with the connecting rods 21. Specifically, there are three retaining rings 31, which are located on the left side of the connecting rods 21 respectively. Thus, the connecting rods 21 are clamped by the corresponding retaining rings 31 and hinge plates 11. Specifically, the connecting part 22 of the connecting rods 21 is clamped by the corresponding retaining rings 31 and hinge plates 11. The right end of the connecting shaft 3 is threaded with a locking nut 32, and the locking nut 32 is located to the right of the rightmost hinge plate 11.

[0035] When the locking nut 32 is tightened, the connecting shaft 3 moves to the right, causing all the retaining rings 31 to move to the right. This causes the locking block 24 to engage in the locking groove 14, locking the handle 2 and effectively preventing the handle 2 from rotating during the leveling process. Compared to bolt and nut connections, this method of locking through friction between the contact surfaces of the components provides a more stable locking mechanism. Simultaneously, the rotating shaft effectively increases the rigidity of the scraper 1, making it less prone to deformation during leveling and thus extending the service life of the device.

[0036] When the tilt angle of handle 2 needs to be adjusted, loosen the locking nut 32, push the connecting shaft 3 and connecting rod 21 to the left, so that the locking block 24 disengages from the locking groove 14, allowing handle 2 to rotate. After adjusting the position of handle 2, tighten the locking nut 32 so that the locking block 24 is re-embedded in the locking groove 14. The adjustment is convenient.

[0037] In some specific implementations, the locking nut 32 can be replaced with a pipe fitting with internal threads. After the pipe fitting is screwed onto the connecting shaft 3, it can completely wrap the threaded section of the connecting shaft 3, thereby effectively preventing concrete from sticking to the threads and causing the locking nut 32 to be difficult to rotate.

[0038] In some specific implementations, the diameters of the connecting shaft 3, the first hinge hole 12, and the second hinge hole 23 are the same, which can effectively prevent the hinge plate 11 and the connecting rod 21 from shaking at the hinge position; the leftmost retaining ring 31 is fixedly connected to the connecting shaft 3, and the left side of the other two retaining rings 31 is provided with a pin 33 to block the left side of the retaining ring 31, so that when the locking nut 32 is tightened, the retaining ring 31 can move to the right with the connecting shaft 3.

[0039] In this embodiment, the connecting shaft 3 is provided with a hole for installing the pin 33. When installing the connecting shaft 3, the connecting shaft 3 is first passed through the first hinge hole 12 and the second hinge hole 23. After the hinge plate 11 and the connecting rod 21 are hinged, the pin 33 is inserted and fixed by welding.

[0040] In some specific implementations, the scraper 1 is provided with an upwardly curved arc-shaped guide plate 4. When scraping, the arc-shaped guide plate 4 can effectively prevent concrete from spilling onto the scraper 1, making it more convenient to use.

[0041] In some specific implementation plans, such as Figure 4 and Figure 5 As shown, the scraper 1 is provided with two opposing angle steels 5, and the angle steels 5 are provided with threaded connection holes 51; the base of the vibrating motor is inserted between the two angle steels 5, and the locking screw is threaded into the threaded connection hole 51. When the locking screw is tightened, the lower end of the locking screw presses tightly against the base of the vibrating motor, thereby fixing the vibrating motor on the scraper 1, thus turning the scraper 1 into a vibrating scraper 1.

[0042] In some specific implementations, the handle 2 is provided with a rubber sleeve 6, which helps to improve the comfort of relevant personnel when gripping the handle 2.

[0043] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A concrete leveling device for building construction, comprising a scraper (1) and a handle (2), characterized in that: The scraper (1) is provided with a hinge plate (11), the hinge plate (11) is provided with a first hinge hole (12), there are three hinge plates (11), which are evenly spaced along the length of the scraper (1), and the middle hinge plate (11) is located in the middle of the scraper (1). A locking ring (13) is provided on one side of the hinge plate (11). The locking ring (13) is coaxially arranged with the first hinge hole (12). Locking grooves (14) are evenly spaced around the end face of the locking ring (13) in the circumferential direction. The handle (2) has three connecting rods (21) at one end, and the connecting rods (21) are arranged in a one-to-one correspondence with the hinge plate (11); The free end of the connecting rod (21) is provided with a connecting part (22), the connecting part (22) is provided with a second hinge hole (23), and locking blocks (24) are evenly spaced around the second hinge hole (23) on the connecting part (22), and the locking blocks (24) are provided in a one-to-one correspondence with the locking groove (14); The connecting shaft (3) passes through the first hinge hole (12) and the second hinge hole (23), thereby hinged the connecting rod (21) to the hinge plate (11); The connecting shaft (3) is provided with retaining rings (31) that correspond one-to-one with the connecting rod (21), and a locking nut (32) is threaded onto one end of the connecting shaft (3).

2. The concrete leveling device for building construction according to claim 1, characterized in that: The leftmost retaining ring (31) is fixedly connected to the connecting shaft (3), and the other two retaining rings (31) are provided with pins (33) on one side.

3. A concrete leveling device for building construction according to claim 1, characterized in that: The scraper (1) is provided with an upwardly curved arc-shaped guide plate (4).

4. A concrete leveling device for building construction according to claim 1, characterized in that: The scraper (1) is provided with two oppositely arranged angle steels (5), and the angle steels (5) are provided with threaded connection holes (51).

5. A concrete leveling device for building construction according to claim 1, characterized in that: The handle (2) is provided with a rubber sleeve (6).

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