Wall steel bar hole grout brush

Abstract

The present invention relates to a wall steel bar eyelet slurry brush, comprising an outer cover, with a handrail fixedly connected to the upper portion of the outer cover; a brush and a rotating rod are provided inside the outer cover, and the brush and the rotating rod are coaxially fixed; a driving component is also provided inside the outer cover, and the driving component drives the rotating rod to rotate. In this solution, the brush head, the rotating shaft and the driving device are all inside the outer cover, the rotating shaft is short, the distance from the driving point to the brush head is short, the torque of the rotating rod is small, it is not easy to be deformed or damaged, and the service life is long.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering, and particularly relates to a slurry brush for wall reinforcement holes. Background Art

[0002] In the construction industry, any formwork reinforcement requires a large number of tie bolts. After the main structure of a project is completed, the formwork needs to be removed and the protruding ends of the tie bolts cut off, resulting in a large number of exposed rebar heads on the wall. To repair the wall, these exposed rebar heads need to be repaired by applying mortar to the exposed ends of the rebar, generally covering an area slightly larger than the bell mouth. The number of tie bolts used can reach hundreds of thousands or even millions. Such a large number of tie bolts means that an equal number of wall holes need to be repaired, which is a very arduous and time-consuming task that usually requires the division of labor among many people.

[0003] There are two existing methods for applying mortar to the exterior of bolt holes: 1. Applying with a brush barehanded; 2. Applying with a brush while holding the mold in the left hand and the brush in the right. When applying mortar barehanded, individual techniques vary, resulting in inconsistent mortar size and thickness, and poor standardization. Due to the heavy workload, sloppy application often occurs, resulting in incomplete or insufficient application near rebar, leading to exposed rebar and rust.

[0004] For applying materials to bolt holes, a Chinese invention patent, publication number CN212507434U, patent number CN202020933929.0, filed on May 28, 2020, discloses a portable wall bolt hole waterproof coating applicator. The device includes an outer cover with a limit barrel at the top, a rotating shaft with a rotating handle at one end, and the other end passing through the limit barrel and outer cover in sequence. A brush head is provided at the lower end of the rotating shaft, and a compression spring is provided on the rotating shaft sleeve above the brush head. The device applies material to the wall plane by rotating the brush head, and the outer cover controls the application range of the material to ensure that the material is applied in a uniform size. This brushing device can indeed improve the standardization of the coating shape of each bolt eye, but it still has some obvious defects: 1) The rotating rod passes through the outer cover, with its lower end fixedly connected to the brush head and the upper end connected to the handle. The rotating rod is relatively long, resulting in large torque, and manual operation is more laborious. Although the electric drive has a high output and can save manpower, the rotating rod is prone to deformation or even breakage; 2) The spring is mounted on the rotating rod, and the lower end of the spring is abutted against the annular fixed plate. When the rotating rod rotates, the lower end of the spring is easily twisted due to friction, resulting in unstable pressure of the brush head on the wall surface.

[0005] The requirements for standardization and standardization of construction are becoming increasingly higher. Since the number of bolt holes is very large, how to repair the holes not only requires faster construction speed but also ensures that the size and thickness of the mortar are consistent and the overall appearance is good. This is an issue that needs to be studied. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the rotating shaft of the brush head of the existing brushing device is long and has a large torque, which makes the rotating shaft easy to be damaged.

[0007] The present invention solves the above problems by adopting the following technical solutions:

[0008] A wall steel bar eyelet slurry brush comprises an outer cover, the upper part of which is fixedly connected to a handrail; a brush and a rotating rod are provided inside the outer cover, and the brush and the rotating rod are fixed coaxially; a driving assembly is also provided inside the outer cover, and the driving assembly drives the rotating rod to rotate, the handrail is provided at an eccentric position of the outer cover, and a first through hole is provided at the top of the center position of the outer cover; an operating handle is also provided, and the operating handle is formed by fixing a horizontal rod and a vertical rod, the lower end of the vertical rod is installed in the first through hole and extends into the inner part of the outer cover, the lower end of the vertical rod is fixedly connected to an annular fixing plate, the lower side of the annular fixing plate is fixedly connected to a connecting rod, and a power supply is provided on the horizontal rod. The switch, the horizontal bar and the vertical bar are hollow steel pipes, and the cavities of the two are connected. A wire hole communicating with the cavity is provided on the lower end of the vertical bar or the annular fixing plate. The power cord of the drive assembly passes through the wire hole and extends inside the vertical bar and the horizontal bar, and the power cord is connected to the power switch; a support plate is fixed inside the outer cover, and a second through hole is provided on the support plate corresponding to the first through hole; a spring is mounted on the upper part of the connecting rod, the upper end of the spring abuts against the annular fixing plate, and the lower end abuts against the support plate; the lower end of the connecting rod passes through the second through hole; the lower end of the connecting rod is fixed to the shaft sleeve, and the upper end of the rotating rod is installed in the shaft sleeve.

[0009] Compared with the prior art, the present invention adopting the above technical solution has the following beneficial effects:

[0010] 1) The brush head, shaft, and drive mechanism are all contained within the housing. The shaft is short, the distance from the drive point to the brush head is short, and the torque on the shaft is low, making it less susceptible to deformation or damage and extending its service life. The housing is pressed against the wall using the handrail, while the brush head is pressed against the wall using the operating handle, allowing for more precise control of both brush pressure and housing pressure. The handrail and handle are integrated into the housing and feature a power switch, allowing for single-handed operation. A support frame and spring connect the housing and brush into a continuous, integrated unit, facilitating automatic brush retraction.

[0011] Preferably, a further technical solution of the present invention is:

[0012] The driving assembly includes a motor, a first gear, and a second gear. The first gear is fixedly connected to the rotating rod, the second gear is fixedly connected to the output shaft of the motor, and the first gear is meshed with the second gear.

[0013] The beneficial effects obtained by the above features are: the motor drives the rotating rod to rotate, which is more labor-saving than manual drive; the gear transmission form applies power from the middle of the rotating rod, so that the upper and lower ends of the rotating rod can be fixed, making the rotation more stable.

[0014] The connecting rod under the support plate is connected to a connecting frame, which is a double-frame structure with a clamp for fixing the connecting rod on the upper and lower sides of the inner end respectively. The outer end of the connecting frame is fixed with a mounting seat for fixing the motor.

[0015] The beneficial effects obtained by the above features are: the double-frame joint support has good stability, ensuring effective transmission at the gear meshing position.

[0016] The first gear is provided with an upper and a lower one, both of which are fixedly sleeved on the rotating rod. The second gear is provided between the two first gears and meshes with the two first gears at the same time.

[0017] The beneficial effects obtained by the above features are as follows: in this solution, the upper and lower double gears engage with the motor gear at the same time, avoiding the problem of the rotating rod shaking during the brush rotation and brushing process, which may cause the gear to disengage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the brush of the present invention being extended to dip into mortar;

[0020] Figure 3 This is a schematic diagram of the arrangement of the armrest and operating handle from a top-down perspective of the present invention;

[0021] Figure 4 This is a schematic diagram of the shaft sleeve node structure of the present invention;

[0022] Figure 5 It is a structural diagram of an embodiment of a steel tube operating handle of the present invention.

[0023] In the figure: 1. brush; 2. rotating rod; 3. outer cover; 301. first through hole; 4. motor; 5. armrest; 6. operating handle; 601. horizontal bar; 602. vertical bar; 7. power switch; 8. annular fixing plate; 801. wire hole; 9. spring; 10. connecting rod; 11. support plate; 1101. second through hole; 12. clamp; 13. bushing; 14. first gear; 15. second gear. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0025] See also Figure 1The present invention provides a wall steel bar eyelet mortar brush, comprising an outer cover 3, with a handrail 5 fixed to the upper portion of the outer cover 3; a brush 1 and a rotating rod 2 are provided inside the outer cover 3, and the brush 1 and the rotating rod 2 are coaxially fixed; a driving assembly for driving the rotating rod 2 to rotate is also provided inside the outer cover 3. The rotating rod 2 rotates to drive the brush 1 to rotate on the wall surface, thereby evenly brushing mortar to the steel bar eyelet. The brush 1 of the present invention has a long fiber brush head. The brush 1 is pressed on the bell mouth, and the exposed steel bar head is inserted into the brush 1. The fiber bristles are inserted into the root of the steel bar head. When the brush 1 rotates, the fiber bristles rotate around the steel bar, and the mortar is coated on the steel bar, avoiding blind spots.

[0026] The drive assembly of the present invention is a motor 4. Both the motor 4 and the rotating rod 2 are mounted inside the outer cover 3. The brush 1 utilizes a short shaft. Specifically, the drive assembly of the present invention includes the motor 4, a first gear 14, and a second gear 15. The first gear 14 is fixedly connected to the rotating rod 2, and the second gear 15 is fixedly connected to the output shaft of the motor 4. The first gear 14 and the second gear 15 mesh with each other. Compared to conventional rotating shafts that extend directly from the handheld end to the end of the brush 1, the drive structure of the present invention is located at the end closest to the brush 1, reducing the torque of the rotating rod 2. The torsional force on the rotating rod 2 itself is greatly reduced, thus preventing damage to the rotating shaft. At the same time, due to the reduced torque, the driving force required can also be reduced, and a low-power motor 4 can be used for drive, saving costs and electricity.

[0027] Preferably, the armrest 5 is arranged at an eccentric position of the outer cover 3, and a first through hole 301 is provided at the center position of the top of the outer cover 3; an operating handle 6 is also provided, and the operating handle 6 is formed by fixing a horizontal rod 601 and a longitudinal rod 602, and the lower end of the longitudinal rod 602 is installed in the first through hole 301 and extends into the interior of the outer cover 3, and the lower end of the longitudinal rod 602 is fixed to the annular fixing plate 8, and the lower side of the annular fixing plate 8 is fixed to the connecting rod 10, and the lower end of the connecting rod 10 is fixed to the shaft sleeve 13, and the upper end of the rotating rod 2 is installed in the shaft sleeve 13; the motor 4 is fixedly connected to the connecting rod 10 through a connecting frame.

[0028] Furthermore, a support plate 11 is fixed to the inside of the outer cover 3, and a second through hole 1101 is provided on the support plate 11 corresponding to the first through hole 301; a spring 9 is sleeved on the upper part of the connecting rod 10, the upper end of the spring 9 abuts against the annular fixing plate 8, and the lower end abuts against the support plate 11; the lower end of the connecting rod 10 passes through the second through hole 1101, and the connecting frame connected to it is arranged under the support plate 11.

[0029] In order to prevent the motor 4 , the connecting rod 41 , and the rotating rod 2 from colliding with each other when they are in relative positions with respect to the outer cover 3 and the support plate 11 , the support plate 11 is provided with a sliding groove corresponding to the motor 4 .

[0030] As shown in the figure, the outer cover 3 of the present invention is a half-rugby ball-shaped cover. The armrest 5 is a gantry frame, with two points at the lower end fixed to the left and right sides of the outer cover 3. The upper end has a crossbeam, which is close to the crossbar 601 of the operating handle 6. The crossbar 601 is slightly higher than the crossbeam due to the support of the spring 9. The armrest 5 of the present invention controls the outer cover 3, and the operating handle 6 controls the brush 1. The present invention can be operated with one hand. The specific operation process can be:

[0031] 1. Dipping in mortar: a. Hook the handrail 5 (the horizontal beam) with the four fingers of your palm, press the tiger's mouth on the beam, rotate your thumb outward, and press the horizontal bar 601 downward, so that the brush 1 is pushed out of the outer cover 3; b. Dip the brush 1 into the mortar bucket so that it is fully soaked in the mortar; c. Retract your thumb and the brush 1 will retract.

[0032] 2. Brushing the holes: a. Hold the handrail 5 and press the outer cover 3 onto the steel hole; b. Press the crossbar 601 again with your thumb, turn on the motor 4 to rotate the brush 1 for 1 to 2 seconds, and then change to other holes to continue brushing.

[0033] As an option, the horizontal bar 601 and the vertical bar 602 are hollow steel tubes, and the cavities of the two are connected. A wire hole 801 that communicates with the cavity is provided on the lower end of the vertical bar 602 or the annular fixing plate 8. The power cord of the motor 4 passes through the wire hole 801 and extends inside the vertical bar 602 and the horizontal bar 601, leading to the horizontal bar 601. The horizontal bar 601 is provided with a power switch 7, and the power cord is connected to the power switch 7. The power switch 7 is a push-on power-on and pressure-loss power-off type. In this way, when brushing, pressing the power switch 7 to rotate the brush 1 also presses the brush 1 downward. The hidden circuit design avoids exposed wires, improves safety, and makes the device more beautiful.

[0034] As an option, the connecting frame is a double-frame structure with a clamp 12 provided on the upper and lower sides of the inner end, respectively. The clamp 12 is locked to the lower part of the connecting rod 10, and the outer end is fixed to the mounting seat. The mounting seat is provided with a through hole for the output shaft of the power supply motor 4 to pass through, and the motor 4 is fixed to the mounting seat by bolts. This example provides better support stability for the motor 4. Preferably, the first gear 14 is provided with an upper and lower two, both of which are fixedly mounted on the rotating rod 2, and the second gear 15 is provided between the two first gears 14 and meshes with the two first gears 14 at the same time; when the brush 1 rotates, due to the strong friction with the wall and the uneven bell mouth, the rotating rod 2 will experience some unstable shaking. The single gear meshing is easy to disengage from the second gear 15 when the rotating rod 2 deviates. Therefore, in this solution, the upper and lower double gears are simultaneously engaged with the motor 4 gears to ensure that the motor 4 drives the rotating rod 2.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent changes made using the contents of the present invention specification and its drawings are included in the scope of the present invention.

Claims

1. A wall reinforcement hole slurry brush, comprising an outer cover (3), a handrail (5) fixedly connected to the upper portion of the outer cover (3); a brush (1) and a rotating rod (2) are provided inside the outer cover (3), the brush (1) and the rotating rod (2) being coaxially fixed; a driving assembly is further provided inside the outer cover (3), the driving assembly driving the rotating rod (2) to rotate, and the characteristics are: The handrail (5) is arranged at an eccentric position of the outer cover (3), and a first through hole (301) is provided at the top of the center position of the outer cover (3); an operating handle (6) is also provided, and the operating handle (6) is formed by fixing a horizontal rod (601) and a vertical rod (602), and the lower end of the vertical rod (602) is installed in the first through hole (301) and extends into the interior of the outer cover (3), and the lower end of the vertical rod (602) is fixed to the annular fixing plate (8), and the lower side of the annular fixing plate (8) is fixed. Connecting the connecting rod (10), a power switch (7) is provided on the cross bar (601), the cross bar (601) and the longitudinal bar (602) are hollow steel tubes, and the cavities of the two are communicated, and a wire hole (801) communicating with the cavity is provided on the lower end of the longitudinal bar (602) or the annular fixing plate (8), and the power line of the driving component passes through the wire hole (801) and extends inside the longitudinal bar (602) and the cross bar (601), and the power line is connected to the power switch (7); A support plate (11) is fixedly connected to the interior of the outer cover (3), and a second through hole (1101) is provided on the support plate (11) corresponding to the first through hole (301); a spring (9) is sleeved on the upper part of the connecting rod (10), the upper end of the spring (9) abuts against the annular fixing plate (8), and the lower end abuts against the support plate (11); the lower end of the connecting rod (10) passes through the second through hole (1101); the lower end of the connecting rod (10) is fixedly connected to the shaft sleeve (13), and the upper end of the rotating rod (2) is installed in the shaft sleeve (13).

2. The wall reinforcement hole slurry brush according to claim 1, characterized in that: The driving assembly comprises a motor (4), a first gear (14), and a second gear (15); the first gear (14) is fixedly connected to the rotating rod (2); the second gear (15) is fixedly connected to the output shaft of the motor (4); and the first gear (14) and the second gear (15) are meshed.

3. The wall reinforcement hole slurry brush according to claim 2, characterized in that: A connecting frame is connected to the connecting rod (10) below the support plate (11). The connecting frame is an upper and lower double-frame structure. A clamp (12) for fixing to the connecting rod (10) is provided on the upper and lower sides of the inner ends thereof, respectively. A mounting seat for fixing the motor (4) is fixedly connected to the outer end of the connecting frame.

4. The wall reinforcement hole slurry brush according to claim 2, characterized in that: The support plate (11) is provided with a sliding groove corresponding to the motor (4).

5. The wall reinforcement hole slurry brush according to claim 2, characterized in that: The first gear (14) is provided with an upper and a lower one, both of which are fixedly mounted on the rotating rod (2); the second gear (15) is provided between the two first gears (14) and meshes with the two first gears (14) at the same time.

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