A plastering device for house civil engineering main body construction

Abstract

The application provides a troweling device for house civil engineering main body construction, comprising: an operating part, a hand-held end of which is used for holding by hand; a parallel four-bar linkage mechanism, comprising a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod which are sequentially hingedly connected, the third connecting rod is hingedly connected with the operating part, the first connecting rod and the second connecting rod are oppositely and parallelly arranged, and the third connecting rod and the fourth connecting rod are oppositely and parallelly arranged; a leveling plate, connected with the first connecting rod and arranged in parallel with the first connecting rod, used for slidingly matching with a leveled reference surface during troweling; an elastic pre-tightening part, arranged between the operating part and the third connecting rod, used for providing a pre-tightening force for the parallel four-bar linkage mechanism; and a troweling plate, connected with the second connecting rod and arranged in parallel with the second connecting rod, used for troweling and pressing mortar. The device simplifies the structure, meets the flexible use requirements under different working conditions, and effectively improves the troweling thickness control and compaction uniformity.

Description

Technical Field

[0001] This application relates to the field of plastering equipment technology, and in particular to a plastering equipment for the main construction of building structures. Background Technology

[0002] In the main construction of buildings, wall plastering is a fundamental process with a large volume and wide application. Its construction quality directly determines the adhesion reliability of subsequent decoration works and the flatness and verticality of the wall after completion. At present, traditional manual plastering is commonly used on construction sites. This involves workers using hand tools such as large boards and trowels to apply mortar to the wall surface, which is then manually compacted and repeatedly scraped to level it.

[0003] However, this traditional approach still has the following significant technical problems in this field: (i) Low construction efficiency and high labor intensity. Plastering operations rely entirely on the physical labor of workers. Long-term continuous operation can easily lead to fatigue of construction workers, which in turn limits the daily construction progress and makes it difficult to meet the needs of large-scale rapid construction.

[0004] (ii) The quality of the finished product is highly dependent on the operator's experience and lacks stability. The final flatness, verticality and uniformity of the plaster layer thickness of the wall surface depend mainly on the worker's skill level and immediate feel. When novices or when their attention is waning, they are very prone to quality defects such as local unevenness, inconsistent thickness and uneven pressure, resulting in a high rework rate. Summary of the Invention

[0005] This application provides a plastering device for building construction, which simplifies the structure while meeting the flexible use requirements under different working conditions, and effectively improves the control of plaster thickness and the uniformity of compaction. The technical solution is as follows: This application provides a plastering device for the main construction of building structures, including: An operating component, the operating component having a handheld end and a working end, the handheld end being for human hand gripping; A parallel four-bar linkage includes a first link, a second link, a third link, and a fourth link that are hinged end to end in sequence. The third link is hinged to the working end of the operating member so that the parallel four-bar linkage can swing relative to the operating member in the front-back direction. The first link and the second link are opposite to each other and parallel to each other, and the lengths of the first link and the second link are equal. The third link and the fourth link are opposite to each other and parallel to each other, and the lengths of the third link and the fourth link are equal. A leveling plate is provided, which is connected to the first connecting rod and is arranged parallel to the first connecting rod. The leveling plate is used to slide and engage with the leveled reference surface during plastering. An elastic preload member is disposed between the operating member and the third link, and the elastic preload member is used to provide preload force to the parallel four-bar linkage to keep the leveling plate in contact with the reference surface; and A trowel plate is connected to the second connecting rod. The trowel plate is arranged parallel to the second connecting rod. The trowel plate and the leveling plate are arranged sequentially in the vertical direction. The trowel plate is used to apply and press the mortar.

[0006] In one embodiment, the trowel plate is movable relative to the second link. The trowel plate has a locked state and an adjustable state. When the trowel plate is in the locked state, it is locked relative to the second link. When the trowel plate is in the adjustable state, it can move relative to the second link in the height direction to adjust the distance between the trowel plate and the plastering plate, so that the plaster thickness is adjustable.

[0007] In one embodiment, a lifting adjustment mechanism is installed on the second link, and the smearing plate is installed on the second link through the lifting adjustment mechanism. The lifting adjustment mechanism is used to drive the smearing plate to switch between the locked state and the adjusted state.

[0008] In one embodiment, the lifting adjustment mechanism includes: A threaded cylinder, wherein the threaded cylinder is disposed on the second connecting rod; and An adjusting bolt, the head of which is located near the second connecting rod on the side away from the trowel plate, the shank of which is threadedly engaged with the first threaded hole of the threaded cylinder, and the shank of which is rotatably connected to the trowel plate.

[0009] In one embodiment, the plastering device for building construction further includes: A bearing is provided on the trowel plate, and the inner ring of the bearing is fitted over the shank of the adjusting bolt so that the inner ring of the bearing can rotate with the adjusting bolt.

[0010] In one embodiment, the operating element includes: A control lever for human hand gripping; A telescopic rod, which is telescopically mounted on the operating rod along the height direction to allow for height adjustment of the operating component, wherein the upper end of the telescopic rod is hinged to the third connecting rod, and an elastic preload is disposed between the telescopic rod and the third connecting rod; and A locking mechanism is provided between the operating lever and the telescopic rod. The locking mechanism is used to lock the telescopic rod onto the operating lever, or to unlock the telescopic rod so that the telescopic rod can move relative to the operating lever.

[0011] In one embodiment, the operating rod has a guide hole and a second threaded hole. The guide hole extends along the height direction, and the second threaded hole is disposed on the outer side wall of the operating rod. The second threaded hole communicates with the guide hole and is perpendicular to the guide hole. The lower end of the telescopic rod is movably inserted into the guide hole. The locking mechanism includes a locking bolt, the head of which is located on the side near the outer wall of the operating rod, the shank of which is threadedly connected to the second threaded hole, and the shank of which abuts against the outer wall of the telescopic rod.

[0012] In one embodiment, the third link and the operating member are arranged side by side in the front-rear direction. The rear side wall of the third link is provided with a hinge seat, and a connecting shaft is installed on the hinge seat. The connecting shaft extends in the left-right direction. The working end of the operating member has a connecting hole through which the connecting shaft passes, and the connecting hole is rotatably engaged with the connecting shaft.

[0013] In one embodiment, the front sidewall of the finding plate is provided with at least two guide protrusions, and the at least two guide protrusions are arranged sequentially at intervals along the length direction of the finding plate. Each guide protrusion is provided with an arc portion, which is used to slide with the reference surface. Alternatively, at least two rollers are installed on the front sidewall of the finding plate, each roller being rotatable relative to the finding plate, and at least two rollers are arranged alternately along the length of the finding plate, the rollers being used for sliding engagement with the reference surface.

[0014] In one embodiment, the first link, the second link, the third link and the fourth link are each provided with wear-resistant bushings at both ends. The corresponding ends of two adjacent links are rotatably connected through the corresponding wear-resistant bushings via hinge shafts, so that the first link, the second link, the third link and the fourth link are sequentially hinged end to end to form the parallel four-bar linkage. The trowel plate includes: Support plate, the support plate being connected to the second link; and A wear-resistant plasterboard is detachably installed on the support plate, and the wear-resistant plasterboard covers the front sidewall of the support plate.

[0015] The advantages or beneficial effects of the above technical solutions include at least the following: 1. The plastering device for building construction of the present invention maintains the leveling plate and the plastering plate parallel at all times through a parallel four-bar linkage mechanism. With the help of elastic pre-tightening components, the leveling plate is always in close contact with the leveled reference surface (such as the reference wall surface or auxiliary guide rail), avoiding poor adhesion due to vibration during construction. This improves the stability of the device and avoids uneven pressure. It can also adapt to the undulations of the wall surface and solve the problem of uneven thickness in traditional manual plastering. During the plastering process, the leveling plate moves laterally along the reference surface, and the plastering plate moves laterally simultaneously to smooth the cement mortar. Thus, by relying on the movement of the leveling plate along the reference surface, the flatness and verticality of the plastering surface can be guaranteed, effectively reducing quality defects such as local unevenness, uneven thickness, and uneven pressure on the plastering surface. Moreover, it eliminates the need for workers to manually control the thickness and flatness, thereby reducing the dependence on workers' operating experience. Even novices can produce a qualified plastering surface.

[0016] 2. In addition, the plastering device has a simple structure, and the operation is achieved by only the operation parts working in conjunction with the parallel four-bar linkage mechanism and the leveling plate and plastering plate. Compared with large automatic plastering machines, the cost is lower and the overall size is small. It can also be flexibly operated on special parts such as columns, beam sides, and narrow walls, making it more adaptable. At the same time, compared with pure manual plastering, it can not only reduce the labor intensity of workers, but also improve construction efficiency.

[0017] 3. The plastering device for building construction of the present invention has low overall wear. The wear-resistant plastering board and wear-resistant bushing are easy-to-replace parts that can be directly replaced and maintained without the need to scrap the entire plastering device, thereby reducing the maintenance cost of long-term use. In addition, the lifting and adjusting mechanism can quickly adjust the plastering thickness, which can be adapted to plastering operations with different construction requirements and has better versatility.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0020] Figure 1 This is a three-dimensional structural diagram of the plastering device for building construction of the present invention from a first-view perspective. Figure 2 A three-dimensional structural diagram of the plastering device for the main construction of a building from a second perspective. Figure 3 for Figure 2 Enlarged view of section A in the image; Figure 4 for Figure 2 A magnified view of section B in the image.

[0021] Figure Labels 1. Operating component; 11. Operating lever; 12. Telescopic rod; 13. Locking mechanism; 2. Parallel four-bar linkage; 21. First link; 22. Second link; 23. Third link; 24. Fourth link; 25. Wear-resistant bushing; 26. Hinge shaft; 3. Leveling plate; 31. Guide protrusion; 311. Arc part; 4. Elastic preload; 5. Plastering plate; 51. Support plate; 52. Wear-resistant plastering plate; 6. Lifting and adjusting mechanism; 61. Threaded cylinder; 62. Adjusting bolt; 7. Hinge seat; 8. Connecting shaft. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0023] See Figures 1-4 This invention illustrates a preferred embodiment of a plastering device for building construction, comprising: Operating component 1 has a handheld end and an opposite working end, the handheld end being for human hand gripping; A parallel four-bar linkage 2 includes a first link 21, a second link 22, a third link 23, and a fourth link 24 that are hinged end to end in sequence. The third link 23 is hinged to the working end of the operating member 1 so that the parallel four-bar linkage 2 can swing relative to the operating member 1 in the front-back direction. The first link 21 and the second link 22 are opposite to each other and parallel to each other, and the lengths of the first link 21 and the second link 22 are equal. The third link 23 and the fourth link 24 are opposite to each other and parallel to each other, and the lengths of the third link 23 and the fourth link 24 are equal. Find plate 3, find plate 3 is connected to first link 21, find plate 3 is set parallel to first link 21, find plate 3 extends horizontally in the left and right direction, find plate 3 is used to slide and cooperate with the leveled reference surface during plastering, the reference surface can be the reference wall surface or auxiliary guide rail. Elastic preload 4 is located between operating member 1 and third link 23. Elastic preload 4 provides preload force to the parallel four-bar linkage 2 to ensure the leveling plate 3 remains in contact with the reference surface; and The trowel plate 5 is connected to the second connecting rod 22. The trowel plate 5 and the second connecting rod 22 are set in parallel. The trowel plate 5 and the leveling plate 3 are arranged in sequence along the vertical direction. The trowel plate 5 extends horizontally along the left and right direction. The trowel plate 5 is used to apply and press the mortar.

[0024] The plastering device for building construction of this invention maintains the leveling plate 3 and plastering plate 5 parallel through a parallel four-bar linkage 2. With the help of an elastic pre-tightening member 4, the leveling plate 3 is always tightly attached to the leveled reference surface (such as a reference wall surface or auxiliary guide rail), preventing loose adhesion due to vibration during construction. This improves the stability of the device, avoids uneven pressure, and adapts to wall undulations, solving the problem of uneven thickness in traditional manual plastering. During plastering, the leveling plate 3 moves laterally along the reference surface, and the plastering plate 5 moves laterally simultaneously to smooth the cement mortar. Thus, relying on the movement of the leveling plate 3 along the reference surface ensures the flatness and verticality of the plaster surface, effectively reducing quality defects such as local unevenness, inconsistent thickness, and uneven pressure. Furthermore, it eliminates the need for workers to manually control the thickness and flatness, reducing reliance on worker experience; even beginners can produce a qualified plaster surface. In addition, the plastering device has a simple structure, and only the operation is achieved by the operation component 1 in conjunction with the parallel four-bar linkage 2, the leveling plate 3, and the plastering plate 5. Compared with large automatic plastering machines, it has a lower cost and a compact overall size. It can also be operated flexibly on special parts such as columns, beam sides, and narrow walls, making it more adaptable. At the same time, compared with pure manual plastering, it can not only reduce the labor intensity of workers, but also improve construction efficiency.

[0025] See Figures 1-2 In one embodiment, the trowel plate 5 is located above the finding plate 3. The trowel plate 5 can move relative to the second connecting rod 22. The trowel plate 5 has a locked state and an adjustable state. When the trowel plate 5 is in the locked state, the trowel plate 5 is locked relative to the second connecting rod 22. When the trowel plate 5 is in the adjustable state, the trowel plate 5 can move relative to the second connecting rod 22 in the height direction to adjust the distance between the trowel plate 5 and the finding plate 3. Specifically, the distance between the bottom surface of the trowel plate 5 and the top surface of the finding plate 3 is adjusted. This distance directly determines the plaster thickness, thereby making the plaster thickness adjustable, improving the adaptability of the plastering device, and thus broadening the application range of the plastering device.

[0026] In practical applications, when the trowel plate 5 is moved away from the leveling plate 3 to the required height, the distance between the trowel plate 5 and the leveling plate 3 increases, and the plastering thickness increases, making the mortar layer thicker; when the trowel plate 5 is moved closer to the leveling plate 3 to the required height, the distance between the trowel plate 5 and the leveling plate 3 decreases, and the plastering thickness decreases, making the mortar layer thinner.

[0027] Understandably, the principle behind controlling plaster layer thickness is as follows: Benchmark setting: Under the action of the elastic pre-tightening member 4, the leveling plate 3 always fits against the leveled benchmark wall or auxiliary guide rail, providing a uniform reference benchmark surface for the plaster thickness.

[0028] Spacing adjustment: The trowel plate 5 can move relative to the leveling plate 3, precisely defining the minimum vertical distance between the bottom surface of the trowel plate 5 and the top surface of the leveling plate 3. This distance directly determines the thickness of the final plaster layer. By moving the trowel plate 5, this distance can be precisely set, thereby controlling the plaster thickness.

[0029] Dynamic holding: The parallel four-bar linkage 2 ensures that the plastering plate 5 and the leveling plate 3 remain parallel during the movement, so that no matter how the plastering device moves, the distance between the plastering plate 5 and the reference surface (the surface that the leveling plate 3 is in contact with) remains constant, thereby ensuring that the plastering thickness of the entire wall is uniform.

[0030] The principle that ensures parallelism in the parallel four-bar linkage 2: Because the parallel four-bar linkage 2 has unique geometric characteristics, its structure consists of two sets of parallel and equal-length links: the first link 21 and the second link 22 are parallel and equal, and the third link 23 and the fourth link 24 are parallel and equal. According to the parallelogram principle, the two opposite sides (such as the first link 21 and the second link 22) always remain parallel in any motion state, and their lengths remain unchanged.

[0031] In this smoothing device, the leveling plate 3 is mounted on the first link 21, while the smoothing plate 5 is movably mounted on the second link 22. When the parallel four-bar linkage 2 moves, since the first link 21 and the second link 22 are always parallel, the smoothing plate 5 and the leveling plate 3 mounted on them also always maintain a parallel relationship.

[0032] The reason for maintaining a uniform plaster thickness: As mentioned above, the smearing plate 5 and the finding plate 3 always remain parallel, and the vertical distance between them is locked. The flat plate 3 always fits against the reference surface, which is equivalent to a fixed reference point. The distance between the flat plate 5 and this reference surface is locked to the preset thickness value. When the worker holds the operating piece 1 and pushes the plastering device along the wall, the leveling plate 3 slides close to the reference surface. The parallel four-bar linkage 2 ensures that the plastering plate 5 can accurately follow the undulations of the reference surface, so that the plastering plate 5 always maintains a constant parallel distance from the reference surface.

[0033] See Figures 1-3In one embodiment, a lifting and adjusting mechanism 6 is installed on the second connecting rod 22. The trowel plate 5 is mounted on the second connecting rod 22 via the lifting and adjusting mechanism 6, which is used to switch the trowel plate 5 between a locked state and an adjusted state. Since the trowel plate 5 is mounted on the second connecting rod 22 via the lifting and adjusting mechanism 6, operating this mechanism allows the trowel plate 5 to switch between a locked state and an adjusted state. In the adjusted state, the trowel plate 5 can be flexibly adjusted to any desired height; after switching to the locked state, the trowel plate 5 is rigidly fixed at that height, thereby ensuring stability and reliability during use. Furthermore, the lifting and adjusting mechanism 6 limits the minimum vertical distance between the trowel plate 5 and the leveling plate 3 and precisely controls the plaster thickness (e.g., 5-20mm), replacing manual judgment and improving construction accuracy.

[0034] See Figures 1-3 In one embodiment, the lifting adjustment mechanism 6 includes: Threaded cylinder 61, mounted on second connecting rod 22, has a first threaded hole extending vertically; and The adjusting bolt 62 has its head located near the second connecting rod 22 on the side opposite to the trowel plate 5. The shank of the adjusting bolt 62 is threaded into the first threaded hole of the threaded cylinder 61, and the shank of the adjusting bolt 62 is rotatably connected to the trowel plate 5. Rotating the head of the adjusting bolt 62 drives it to move vertically. Since the adjusting bolt 62 and the trowel plate 5 are in a rotating fit, the rotational movement of the adjusting bolt 62 is not transmitted to the trowel plate 5. Therefore, the trowel plate 5 only translates with the adjusting bolt 62, displacing itself relative to the leveling plate 3, thereby changing the distance between them and ultimately adjusting the plaster thickness. Simultaneously, by utilizing the helical fit between the threaded cylinder 61 and the adjusting bolt 62, rotating the adjusting bolt 62 allows for continuous and precise adjustment of the distance, achieving stepless adjustment of the plaster thickness with high accuracy and convenient operation.

[0035] In one embodiment, the head of the adjusting bolt 62 has a polygonal cross-section, such as any one of pentagonal, hexagonal, octagonal, etc., to provide a larger gripping surface, thereby increasing the stability of the user's grip on the head of the adjusting bolt 62 and preventing slippage.

[0036] Of course, in other embodiments, the cross-section of the head of the adjusting bolt 62 may also be circular. In this case, anti-slip ridges may be provided on the outer peripheral wall of the head of the adjusting bolt 62, which can also increase the stability of the user when holding the head of the adjusting bolt 62 and prevent slippage.

[0037] In one embodiment, a plastering device for building construction also includes: The bearing (not shown in the figure) is mounted on the trowel plate 5. The inner ring of the bearing is fitted over the shank of the adjusting bolt 62 so that the inner ring of the bearing can rotate with the adjusting bolt 62. In other words, the bearing enables the rotational connection between the shank of the adjusting bolt 62 and the trowel plate 5. This not only achieves a stable connection between the shank of the adjusting bolt 62 and the trowel plate 5, but also improves the smoothness of the rotation of the adjusting bolt 62.

[0038] Of course, in other embodiments, the sizing plate 5 is provided with a mating hole, and the rod of the adjusting bolt 62 is inserted into the mating hole in a rotatable manner after passing through the first threaded hole of the threaded cylinder 61. At the same time, a limiting nut is provided on the rod of the adjusting bolt 62 or the sizing plate 5. The limiting nut restricts the rod of the adjusting bolt 62 from disengaging from the sizing plate 5. In this way, a reliable rotatable connection between the rod of the adjusting bolt 62 and the sizing plate 5 can also be achieved.

[0039] Of course, in other embodiments, the lifting adjustment mechanism 6 may also adopt the following structure, the lifting adjustment mechanism 6 including: A first adjusting part is provided on the second connecting rod 22; and The second adjustment part is provided on the smearing plate 5. The second adjustment part is engaged with the first adjustment part to lock the smearing plate 5 at any height position. When the second adjustment part is disengaged from the first adjustment part, the smearing plate 5 can move relative to the second connecting rod 22, thereby adjusting the distance between the smearing plate 5 and the finding plate 3.

[0040] Specifically, the second adjustment part has a plurality of first engaging parts, which are arranged sequentially along the moving direction of the smearing plate 5. The first adjustment part includes a button and an elastic element. The first end of the button is provided with a pressing part, and the second end of the button is provided with a second engaging part. The middle part of the button is hinged to the second connecting rod 22 so that the button can swing around the hinge center, thereby causing the second engaging part to move closer to or away from the second adjustment part, thereby causing the second engaging part to be inserted into or disengaged from the first engaging part. The elastic element is provided between the second connecting rod 22 and the first end of the button. The elastic element is used to provide elastic force to the button so that the second engaging part and the first engaging part are kept engaged, thereby restricting the smear plate 5 to a locked state.

[0041] See Figures 1-2 In one embodiment, the operating element 1 includes: The control lever 11 is for human hand gripping; Telescopic rod 12 is telescopically mounted on operating rod 11 along the height direction to adjust the height of operating component 1. The upper end of telescopic rod 12 is hinged to third connecting rod 23. Elastic preload 4 is disposed between telescopic rod 12 and third connecting rod 23. A locking mechanism 13 is located between the operating rod 11 and the telescopic rod 12. The locking mechanism 13 is used to lock the telescopic rod 12 onto the operating rod 11, or to unlock the telescopic rod 12, allowing it to move relative to the operating rod 11. By adjusting the overall height of the operating component 1, it can adapt to walls of different heights (e.g., from the ground to the bottom of a beam). Furthermore, this plastering device is compact, facilitating flexible movement when working on special locations such as columns, beam sides, and narrow walls. The position of the operating component 1 can be adjusted according to the construction height and space, ensuring that plastering operations can be completed normally under various working conditions.

[0042] See Figures 1-2 In one embodiment, the operating lever 11 has a guide hole (not shown in the figure) and a second threaded hole (not shown in the figure). The guide hole extends along the height direction, and the second threaded hole is provided on the outer side wall of the operating lever 11. The second threaded hole communicates with the guide hole and is perpendicular to the guide hole. The lower end of the telescopic lever 12 is movably inserted into the guide hole. The locking mechanism 13 includes a locking bolt. The head of the locking bolt is located on the side near the outer wall of the operating rod 11. The shank of the locking bolt is threaded into the second threaded hole, and the shank of the locking bolt abuts against the outer wall of the telescopic rod 12. Thus, by loosening the locking bolt, the shank of the locking bolt is disengaged from the outer wall of the telescopic rod 12, allowing the telescopic rod 12 to move flexibly along the operating rod 11. After moving to the desired position, the locking bolt is tightened so that the shank of the locking bolt abuts against the outer wall of the telescopic rod 12. This method is simple to operate and has high adjustment efficiency.

[0043] Of course, in other embodiments, the locking mechanism 13 can also adopt the same structure as the lifting adjustment mechanism 6 described above, as long as it can achieve the overall height of the adjustment operation member 1.

[0044] In one embodiment, the end of the operating lever 11 away from the telescopic lever 12 is provided with a non-slip handle for hand gripping, so as to increase grip stability.

[0045] To achieve the hinged connection between the operating element 1 and the third link 23, see [link / reference]. Figures 1-2 In one embodiment, the third link 23 and the operating member 1 are arranged side by side in the front-rear direction. The rear side wall of the third link 23 is provided with a hinge seat 7, and a connecting shaft 8 is installed on the hinge seat 7. The connecting shaft 8 extends in the left-right direction. The working end of the operating member 1 has a connecting hole through which the connecting shaft 8 passes. The connecting hole and the connecting shaft 8 are rotatably engaged.

[0046] Of course, in other embodiments, the working end of the operating member 1 and the third connecting rod can also be hinged together by a damping hinge.

[0047] See Figure 4In one embodiment, the front sidewall of the finding plate 3 is provided with at least two guide protrusions 31. The at least two guide protrusions 31 are arranged sequentially at intervals along the length direction of the finding plate 3. Each guide protrusion 31 is provided with an arc portion 311, which is used to slide with the reference surface. Alternatively, at least two rollers are installed on the front side wall of the leveling plate 3. Each roller can rotate relative to the leveling plate 3, and the at least two rollers are arranged alternately along the length of the leveling plate 3. The rollers are used for sliding engagement with the reference surface. In this way, in practical applications, the arc portion 311 or the rollers can reduce the moving resistance of the leveling plate 3, ensuring smooth movement while avoiding scratching the plastered surface.

[0048] See Figures 1-2 Specifically, in one embodiment, each of the first link 21, the second link 22, the third link 23, and the fourth link 24 is provided with wear-resistant bushings 25 at both ends. The corresponding ends of two adjacent links are rotatably connected by a hinge shaft 26 passing through the corresponding wear-resistant bushings 25, so that the first link 21, the second link 22, the third link 23, and the fourth link 24 are sequentially hinged to form a parallel four-bar linkage 2. In practical applications, the wear-resistant bushings 25 can reduce the frictional loss at the hinge points of each link, maintain the motion accuracy of the parallel four-bar linkage, and improve the mechanical durability of the parallel four-bar linkage 2.

[0049] See Figures 1-2 In one embodiment, the smearing plate 5 includes: Support plate 51, support plate 51 is connected to second link 22; and The wear-resistant plaster board 52 is detachably installed on the support plate 51. The wear-resistant plaster board 52 covers the front side wall of the support plate 51. The detachable wear-resistant plaster board 52 is easy to replace and reduces long-term use costs.

[0050] Specifically, the wear-resistant plasterboard 52 can be connected together by any one or a combination of screws, bolts, clips, magnets, etc.

[0051] Reference Figure 1 and Figure 2 The elastic preload 4 is a compression spring. One end of the compression spring is fixedly installed on the telescopic rod 12, and the other end is fixedly installed on the third link 23. In practical applications, the compression spring connects the operating rod 11 and the third link 23 to provide a constant preload force, ensuring that the leveling plate 3 adapts to uneven wall surfaces.

[0052] Of course, in other embodiments, the elastic preload 4 can be any elastic component such as a spring sheet or an elastic rubber sleeve.

[0053] The working principle of this invention is as follows: Before construction, first, according to the required plaster thickness, rotate the head of the adjusting bolt 62 to drive the adjusting bolt 62 to rotate. Through the threaded engagement between the adjusting bolt 62 and the threaded cylinder 61, adjust the length of the adjusting bolt 62 extending out of the second connecting rod 22. In this way, accurately set the distance between the bottom surface of the plastering plate 5 and the top surface of the leveling plate 3 to complete the pre-adjustment of the plaster thickness. Then, loosen the locking bolt and adjust the length of the telescopic rod 12 extending out of the operating rod 11 so that the total length of the operating part 1 is adapted to the height of the current construction surface. After the adjustment is completed, tighten the locking bolt to lock the rod length. During construction, the worker holds the anti-slip handle and attaches the leveling plate 3 to the leveled reference wall or the pre-set auxiliary guide rail. Under the pre-tightening force of the elastic pre-tightening member 4, the leveling plate 3 will always be in close contact with the reference surface. Then, the mortar is laid on the wall to be plastered. The entire device is moved along the reference surface, and the plastering plate 5 can compact and spread the mortar evenly. Since the parallel four-bar linkage 2 always keeps the plastering plate 5 parallel to the leveling plate 3, the leveling plate 3 slides along the reference surface during the movement, which can ensure that the plastering surface is always parallel to the reference surface. It automatically ensures that the plastering thickness is uniform and the flatness and verticality of the wall meet the requirements, without the need for the worker to manually control the flatness and thickness. When working on special parts such as columns, beam sides, and narrow walls, the compact device can be moved flexibly, and the telescopic operating part 1 can also be adapted to different construction heights and spaces, and plastering work can be completed normally. After long-term use, if the wear-resistant plasterboard 52 is worn or the gap at the hinge is too large, the screws can be removed directly to replace the wear-resistant plasterboard 52, or the wear-resistant bushing 25 at the hinge point can be replaced to complete the device maintenance without replacing the whole device.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A plastering device for the main construction of building structures, characterized in that, include: An operating component, the operating component having a handheld end and a working end, the handheld end being for human hand gripping; A parallel four-bar linkage includes a first link, a second link, a third link, and a fourth link that are hinged end to end in sequence. The third link is hinged to the working end of the operating member so that the parallel four-bar linkage can swing relative to the operating member in the front-back direction. The first link and the second link are opposite to each other and parallel to each other, and the lengths of the first link and the second link are equal. The third link and the fourth link are opposite to each other and parallel to each other, and the lengths of the third link and the fourth link are equal. A leveling plate is provided, which is connected to the first connecting rod and is arranged parallel to the first connecting rod. The leveling plate extends in the left and right direction and is used to slide and engage with the leveled reference surface during plastering. An elastic preload member is disposed between the operating member and the third link, and the elastic preload member is used to provide preload force to the parallel four-bar linkage to keep the leveling plate in contact with the reference surface; and A trowel plate is connected to the second connecting rod. The trowel plate is arranged parallel to the second connecting rod. The trowel plate and the leveling plate are arranged sequentially in the vertical direction. The trowel plate extends in the horizontal direction. The trowel plate is used to apply and press the mortar.

2. The plastering device for the main construction of a building according to claim 1, characterized in that, The plastering plate is located above the finding plate. The plastering plate can move relative to the second connecting rod. The plastering plate has a locked state and an adjustable state. When the plastering plate is in the locked state, the plastering plate is locked relative to the second connecting rod. When the plastering plate is in the adjustable state, the plastering plate can move relative to the second connecting rod in the height direction to adjust the distance between the plastering plate and the finding plate, so that the plastering thickness can be adjusted.

3. A plastering device for the main construction of a building according to claim 2, characterized in that, A lifting adjustment mechanism is installed on the second link, and the smearing plate is installed on the second link through the lifting adjustment mechanism. The lifting adjustment mechanism is used to drive the smearing plate to switch between the locked state and the adjusted state.

4. A plastering device for the main construction of a building according to claim 3, characterized in that, The lifting and adjusting mechanism includes: A threaded cylinder, wherein the threaded cylinder is disposed on the second connecting rod; and An adjusting bolt, the head of which is located near the second connecting rod on the side away from the trowel plate, the shank of which is threadedly engaged with the first threaded hole of the threaded cylinder, and the shank of which is rotatably connected to the trowel plate.

5. A plastering device for the main construction of a building according to claim 4, characterized in that, The plastering device for building construction also includes: A bearing is provided on the trowel plate, and the inner ring of the bearing is fitted over the shank of the adjusting bolt so that the inner ring of the bearing can rotate with the adjusting bolt.

6. A plastering device for the main construction of a building according to claim 1, characterized in that, The operating element includes: A control lever for human hand gripping; A telescopic rod, which is telescopically mounted on the operating rod along the height direction to allow for height adjustment of the operating component, wherein the upper end of the telescopic rod is hinged to the third connecting rod, and an elastic preload is disposed between the telescopic rod and the third connecting rod; and A locking mechanism is provided between the operating lever and the telescopic rod. The locking mechanism is used to lock the telescopic rod onto the operating lever, or to unlock the telescopic rod so that the telescopic rod can move relative to the operating lever.

7. A plastering device for the main construction of a building according to claim 6, characterized in that, The operating rod has a guide hole and a second threaded hole. The guide hole extends along the height direction, and the second threaded hole is located on the outer side wall of the operating rod. The second threaded hole communicates with the guide hole and is perpendicular to the guide hole. The lower end of the telescopic rod is movably inserted into the guide hole. The locking mechanism includes a locking bolt, the head of which is located on the side near the outer wall of the operating rod, the shank of which is threadedly connected to the second threaded hole, and the shank of which abuts against the outer wall of the telescopic rod.

8. A plastering device for the main construction of a building according to claim 1, characterized in that, The third link and the operating member are arranged side by side in the front-rear direction. The rear side wall of the third link is provided with a hinge seat. A connecting shaft is installed on the hinge seat. The connecting shaft extends in the left-right direction. The working end of the operating member has a connecting hole for the connecting shaft to pass through. The connecting hole is rotatably engaged with the connecting shaft.

9. A plastering device for the main construction of a building according to claim 1, characterized in that, The front sidewall of the finding plate is provided with at least two guide protrusions, and the at least two guide protrusions are arranged sequentially at intervals along the length direction of the finding plate. Each guide protrusion is provided with an arc portion, which is used to slide with the reference surface. Alternatively, at least two rollers are installed on the front sidewall of the finding plate, each roller being rotatable relative to the finding plate, and at least two rollers are arranged alternately along the length of the finding plate, the rollers being used for sliding engagement with the reference surface.

10. A plastering device for the main construction of a building according to claim 1, characterized in that, The first link, the second link, the third link and the fourth link are each provided with wear-resistant bushings at both ends. The corresponding ends of two adjacent links are rotatably connected through the corresponding wear-resistant bushings via hinge shafts, so that the first link, the second link, the third link and the fourth link are sequentially hinged end to end to form the parallel four-bar linkage. The trowel plate includes: Support plate, the support plate being connected to the second link; and A wear-resistant plasterboard is detachably installed on the support plate, and the wear-resistant plasterboard covers the front sidewall of the support plate.

Images