Steel bar planting hole cleaning tool for secondary transformation

Abstract

The utility model belongs to the technical field of secondary reinforcement engineering, and particularly relates to a secondary reformed embedded steel bar hole cleaning tool which comprises an outer layer pipe, an inner layer pipe, a central air hole, an inner lateral air hole, an outer lateral air hole, a hole plug, a cleaning brush, an air pump and a rotary driving assembly, the outer layer pipe is arranged outside the inner layer pipe in a sleeved mode, and the central air hole is formed in the center of the front end of the inner layer pipe. The inner side air holes are formed in the side wall of the front end of the inner-layer pipe at equal intervals, the outer side air holes are formed in the side wall of the front end of the outer-layer pipe at equal intervals, the inner side ends of the inner side air holes communicate with the middle of the center air hole, the hole plug is arranged in the inner-layer pipe and blocks the front end of the center air hole by moving forwards, and the cleaning brushes are arranged on the surface of the outer-layer pipe at equal intervals. The cleaning brushes and the outer side air holes are distributed in a staggered mode, the air pump is connected with the rear end of the inner-layer pipe, and the power end of the rotary driving assembly is connected with the outer-layer pipe. The hole cleaning device has the advantages of being better in hole cleaning effect and easy and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of secondary reinforcement engineering technology; specifically, this utility model relates to a tool for cleaning rebar holes during secondary modification. Background Technology

[0002] Cleaning the holes for rebar installation is a crucial step in secondary reinforcement projects using rebar installation. The effectiveness of the cleaning directly affects the quality of the secondary reinforcement project, while the efficiency of the cleaning affects the project schedule.

[0003] Currently, the existing technology for cleaning rebar anchoring holes mainly involves inserting a flexible hose into the anchoring hole using a blower. To ensure effective cleaning, a brush is also needed to sweep the hole. However, since the blowing and sweeping operations need to be performed separately and repeatedly, the cleaning efficiency is low. Therefore, this application provides a modified rebar anchoring hole cleaning tool. Utility Model Content

[0004] In view of this, the present invention provides a secondary modified tool for cleaning rebar holes, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0005] To achieve the aforementioned objectives, this utility model provides a secondary modification tool for cleaning rebar holes, comprising an outer tube, an inner tube, a central air hole, inner lateral air holes, outer lateral air holes, a hole plug, a cleaning brush, an air pump, and a rotary drive assembly. The outer tube is sleeved over the inner tube. The central air hole is located at the center of the front end of the inner tube. The inner lateral air holes are equidistantly arranged on the side wall of the front end of the inner tube, and the outer lateral air holes are equidistantly arranged on the side wall of the front end of the outer tube. The inner lateral air holes and... When the outward air holes are staggered, both the outward and inward air holes are closed. The inner end of the inward air hole is connected to the middle of the central air hole. The plug is placed in the inner tube, and the plug blocks the front end of the central air hole by moving forward. The cleaning brush is equidistantly placed on the surface of the outer tube, and the cleaning brush is staggered with the outward air holes. The air pump is connected to the rear end of the inner tube. The power end of the rotary drive assembly is connected to the outer tube and is used to drive the outer tube to rotate.

[0006] Preferably, the inner tube includes a front tube and a rear tube distributed front to back. The rear end of the rear tube is connected to the air pump, and the front end of the rear tube is slidably inserted into the rear end of the front tube. Multiple guide balls are fixed at equal intervals in the circumferential direction on the surface of the rear tube. A spiral groove is provided on the inner wall of the outer tube. The guide balls are located in the spiral groove and slide with it. The guide balls move from the rear end to the front end of the spiral groove, causing the outer tube to rotate to a state where the outer air hole and the inner air hole are aligned.

[0007] Preferably, the inner wall surface of the front tube is provided with a plurality of centrally symmetrically distributed strip grooves, and the front end of the surface of the rear tube is fixedly provided with a strip block that slides in cooperation with the strip grooves.

[0008] Preferably, the outer tube has an annular groove inside, the rear tube has an outwardly protruding ring on its surface that can move axially within the annular groove, and a first return spring is provided between the front end face of the outwardly protruding ring and the front end wall of the annular groove.

[0009] Preferably, the inner diameter of the central vent is smaller than the inner diameter of the inner tube, the rear end of the plug is fixedly connected to a core rod, and the rear end of the core rod is fixedly connected to the inner wall of the rear tube through a connecting rod.

[0010] Preferably, the outer tube and the inner tube are respectively provided with an outer spherical part and an inner spherical part at their front ends, the central air hole is located at the center of the inner spherical part, the inner lateral air hole and the outer lateral air hole are respectively provided on the sidewalls of the inner spherical part and the outer spherical part, and the front end of the inner spherical part extends from the front end of the outer spherical part.

[0011] Preferably, both the inner and outer air vents are inclined backward at their outer ends.

[0012] Preferably, the rotary drive assembly includes a front bracket, a motor, a first gear, and a second gear. The front bracket is sleeved on the outside of the outer tube and can slide axially on the outer tube. The motor is mounted on the front bracket. The first gear is rotatably mounted on the front bracket and the power output end of the motor is connected to the first gear. The second gear is fixedly sleeved on the surface of the outer tube. The front bracket moves forward on the outer tube to separate the first gear from the second gear.

[0013] Preferably, the top of the front and rear sides of the front bracket are respectively provided with a front circular hole and a rear circular hole, the inner wall of the front circular hole is in contact with the outer tube, the inner diameter of the rear circular hole is larger than the outer diameter of the second gear, and a second return spring is provided between the front side of the front bracket and the outer tube.

[0014] Preferably, the air pump has a slide plate at its bottom, a rear support is slidably mounted on the bottom of the slide plate, the rear support is fixed to the rear end of the front support, and both the front support and the slide plate have handles at their bottoms.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] 1. By setting the outer tube to drive the cleaning brush to rotate, the cleaning brush can directly clean the hole wall during the insertion of the rebar hole, thus improving the cleaning effect.

[0017] 2. By setting up internal and external air holes and a plug, after the outer and inner tubes are inserted to the deepest position of the anchoring hole, they are connected through the internal and external air holes, and the plug blocks the front end of the central air hole. This allows high-pressure airflow to blow through the central air hole, internal air hole, and external air hole to the side wall of the anchoring hole, blowing dust and gravel out of the hole and improving the hole cleaning effect.

[0018] 3. By setting the front bracket to move forward on the outer tube, the first gear and the second gear can be separated, allowing the outer tube to rotate relative to the first gear. This removes the restriction of the first gear on the outer tube. At the same time, by setting the slide plate to move forward, the guide ball and the spiral groove can control the alignment and connection of the outer and inner air holes, and the plug can seal the front end of the central air hole. This makes the operation simple and convenient, requiring only the operator to push the front bracket and the slide plate forward one after the other. Attached Figure Description

[0019] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This utility model Figure 1 Enlarged view of point A;

[0022] Figure 3 This utility model Figure 1 A partial sectional view;

[0023] Figure 4 This utility model Figure 3 Enlarged view of point B;

[0024] Figure 5 This utility model Figure 3 Enlarged view of point C;

[0025] Figure 6This is a schematic diagram of the outer tube of this utility model after being cut open;

[0026] Figure 7 This is a schematic diagram of the front tube body of this utility model after being cut open;

[0027] Figure 8 This is a schematic diagram of the rear tube body of this utility model after being cut open;

[0028] Figure 9 This is a schematic diagram of the front support of this utility model after being cut open.

[0029] Reference numerals: 1-Outer tube; 2-Inner tube; 2.1-Front tube body; 2.2-Rear tube body; 2.3-Strip groove; 2.4-Strip block; 3-Central air hole; 4-Inner side air hole; 5-Outer side air hole; 6-Plugging hole; 7-Cleaning brush; 8-Air pump; 9-Rotary drive assembly; 9.1-Front bracket; 9.2-Motor; 9.3-First gear; 9.4-Second gear; 9.5-Front circular hole; 9.6-Rear circular hole; 9.7-Second return spring; 10-Guide ball; 11-Helical groove; 12-Annular groove; 13-Outer convex ring; 14-First return spring; 15-Core rod; 16-Connecting rod; 17-Outer spherical part; 18-Inner spherical part; 19-Slide plate; 20-Rear bracket; 21-Handle. Detailed Implementation

[0030] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] like Figures 1 to 9 As shown, this utility model provides a tool for cleaning rebar holes in secondary modifications, including an outer tube 1, an inner tube 2, a central air hole 3, inner lateral air holes 4, outer lateral air holes 5, a hole plug 6, a cleaning brush 7, an air pump 8, and a rotary drive assembly 9. The outer tube 1 is sleeved on the outside of the inner tube 2. The central air hole 3 is located at the center of the front end of the inner tube 2. The inner lateral air holes 4 are equidistantly arranged on the side wall of the front end of the inner tube 2, and the outer lateral air holes 5 are equidistantly arranged on the side wall of the front end of the outer tube 1. The inner lateral air holes 4 and the outer lateral air holes 5 are connected at the same distance. When the air holes 5 are staggered, both the outer air holes 5 and the inner air holes 4 are closed. The inner end of the inner air hole 4 is connected to the middle of the central air hole 3. The plug 6 is placed in the inner tube 2, and the plug 6 blocks the front end of the central air hole 3 by moving forward. The cleaning brush 7 is equidistantly placed on the surface of the outer tube 1, and the cleaning brush 7 is staggered with the outer air holes 5. The air pump 8 is connected to the rear end of the inner tube 2. The power end of the rotary drive assembly 9 is connected to the outer tube 1 and is used to drive the outer tube 1 to rotate.

[0032] In this embodiment, the outer tube 1 can rotate outside the inner tube 2 and move axially outside the inner tube 2. The central air hole 3 is used to spray high-pressure airflow in advance along the insertion direction to clean the rebar hole. By rotating the outer tube 1 outside the inner tube 2, the outward air hole 5 and the inward air hole 4 can be switched from an interleaved state to an aligned and connected state. The outer diameter of the plug 6 is set to be the same as the inner diameter of the central air hole 3. When the plug 6 moves forward to the front end of the central air hole 3, it can block the front end of the central air hole 3. At this time, if the inward air hole 4 and the outward air hole 5 are connected, the high-pressure airflow can be blown out sequentially from the central air hole 3, the inward air hole 4, and the outward air hole 5 to clean the hole wall of the rebar hole. The rotation drive assembly 9 drives the outer tube 1 to rotate, so that the outer tube 1 drives the cleaning brush 7 to rotate. The cleaning brush 7 can clean the hole wall of the rebar hole, improving the cleaning effect. The air pump 8 directly supplies high-pressure gas to the inner tube 2.

[0033] Specifically, in this embodiment, the inner tube 2 includes a front tube 2.1 and a rear tube 2.2 distributed front to back. The rear end of the rear tube 2.2 is connected to the air pump 8. Specifically, the rear end of the rear tube 2.2 is rotatably engaged with the tube at the front end of the air pump 8, and the front end of the rear tube 2.2 is slidably inserted into the rear end of the front tube 2.1. Multiple guide balls 10 are fixed at equal intervals in the circumferential direction on the surface of the rear tube 2. A spiral groove 11 is provided on the inner wall surface of the outer tube 1. The guide balls 10 are located in the spiral groove 11 and are slidably engaged with it. The guide balls 10 move from the rear end to the front end of the spiral groove 11, so that the outer tube 1 rotates to a state where the outer air hole 5 is aligned with the inner air hole 4.

[0034] At this time, when the rear tube 2.2 moves forward, the guide ball pushes the spiral groove 11, which in turn drives the outer tube 1 to rotate, thereby causing the outer air hole 5 to rotate to a state where it is aligned and connected with the inner air hole 4. In the initial state, when the rotation drive assembly 9 drives the outer tube 1 to rotate, the spiral groove 11 applies a force to the guide ball 10, causing the inner tube 2 to rotate synchronously with the outer tube 1.

[0035] More specifically, the inner wall of the front tube 2.1 is provided with multiple centrally symmetrically distributed strip grooves 2.3, and the front end of the surface of the rear tube 2.2 is fixedly provided with a strip block 2.4 that slides with the strip grooves 2.3. Through the cooperation of the strip grooves 2.3 and the strip block 2.4, when the rotation drive assembly 9 drives the outer tube 1 to rotate, the entire inner tube 2 can synchronously follow the rotation of the outer tube 1. When the rear tube 2.2 drives the guide ball 10 to press the spiral groove 11 forward, the strip block 2.4 moves forward within the strip groove 2.3.

[0036] The outer tube 1 has an annular groove 12 inside, and the surface of the rear tube 2.2 has an outwardly protruding ring 13 that can move axially within the annular groove 12. A first return spring 14 is provided between the front end face of the outwardly protruding ring 13 and the front end wall of the annular groove 12. The annular groove 12 provides sufficient installation space for the first return spring 14. The first return spring 14 provides force to the rear tube 2.2 and the outer tube 1 through the outwardly protruding ring 13 and the annular groove 12, so that in the initial state, the rear tube 2.2 is located at the rearmost side on the outer tube 1. When the guide ball 10 moves forward, the first return spring 14 is compressed.

[0037] The inner diameter of the central vent 3 is smaller than that of the inner tube. A core rod 15 is fixedly connected to the rear end of the plug 6, and the rear end of the core rod 15 is fixed to the inner wall of the rear tube 2.2 via a connecting rod 16. Initially, the rear tube 2.2 is located at the rearmost position on the outer tube 1. At this time, there is sufficient clearance between the plug 6, the core rod 15, and the inner wall of the inner tube 2, serving as a channel for airflow. When the rear tube 2.2 moves forward within the outer tube 1, causing the outer tube 1 to rotate relative to the inner tube 2, aligning and connecting the outer vent 5 with the inner vent 4, the rear tube 2.2, through the connecting rod 16 and the core rod 15, drives the plug 6 forward within the inner tube 2 and inserts it to the front end of the central vent 3, sealing the central vent 3.

[0038] Specifically, in this embodiment, the outer tube 1 and the inner tube 2 are respectively provided with an outer spherical portion 17 and an inner spherical portion 18 at their front ends. A central air hole 3 is located at the center of the inner spherical portion 18. An inner lateral air hole 4 and an outer lateral air hole 5 are respectively located on the sidewalls of the inner spherical portion 18 and the outer spherical portion 17, and the front end of the inner spherical portion 18 extends from the front end of the outer spherical portion 17. The outer diameter of the inner spherical portion 18 is larger than the outer diameter of the inner tube 2, and the outer diameter of the outer spherical portion 17 is larger than the outer diameter of the outer tube 1. This arrangement extends the length of the inner lateral air hole 4 and the outer lateral air hole 5, improving the airflow guiding effect. When inserted to the bottom of the anchor hole, the end face of the inner spherical portion 18 contacts the bottom of the hole, allowing the outer tube 1 to be in a free state, facilitating its rotation.

[0039] Specifically, in this embodiment, both the inner air hole 4 and the outer air hole 5 are tilted backward at their outer ends. This arrangement ensures that when the inner air hole 4 and the outer air hole 5 are aligned and connected, the high-pressure airflow blown out from inside can sweep the dust and gravel in the anchor hole to the outside of the anchor hole, improving the hole cleaning effect.

[0040] Specifically, in this embodiment, the rotary drive assembly 9 includes a front support 9.1, a motor 9.2, a first gear 9.3, and a second gear 9.4. The front support 9.1 is sleeved on the outside of the outer tube 1 and can slide axially on the outer tube 1. The motor 9.2 is mounted on the front support 9.1. The first gear 9.3 is rotatably mounted on the front support 9.1 and the power output end of the motor 9.2 is connected to the first gear 9.3. The second gear 9.4 is fixedly sleeved on the surface of the outer tube 1. The front support 9.1 moves forward on the outer tube 1, causing the first gear 9.3 and the second gear 9.4 to separate.

[0041] At this time, when the motor 9.2 is running, it drives the first gear 9.3 to rotate, the first gear 9.3 drives the second gear 9.4 to rotate, the second gear 9.4 drives the outer tube 1 to rotate, and the outer tube 1 drives the cleaning brush 7 to rotate, so as to realize the cleaning operation of the hole wall of the rebar hole.

[0042] The front bracket 9.1 has a front circular hole 9.5 and a rear circular hole 9.6 on its front and rear sides, respectively. The inner wall of the front circular hole 9.5 contacts the outer tube 1, and the inner diameter of the rear circular hole 9.6 is larger than the outer diameter of the second gear 9.4. A second return spring 9.7 is provided between the front side of the front bracket 9.1 and the outer tube 1. When the front end of the outer tube 1 is limited, pushing the bracket forward will cause the bracket to move forward on the outer tube 1 and compress the second return spring 9.7. During the forward movement of the bracket, the first gear 9.3 will move forward and disengage from the second gear 9.4, thereby releasing the limitation of the first gear 9.3 on the second gear 9.4 and ensuring that the outer tube 1 can rotate freely. When the first gear 9.3 disengages from the second gear 9.4, the second gear 9.4 is located in the rear circular hole 9.6.

[0043] The air pump 8 has a slide plate 19 at its bottom, and a rear support 20 is slidably mounted on the bottom of the slide plate 19. The rear support 20 is fixed to the rear end of the front support 9.1, and both the front support 9.1 and the slide plate 19 have handles 21 at their bottoms. By pushing the slide plate 19 forward, the air pump 8 pushes the rear tube 2.2 forward. In turn, the rear tube 2.2 drives the outer tube 1 to rotate through the guide ball 10 and the spiral groove 11, aligning and connecting the outer air hole 5 with the inner air hole 4.

[0044] When using the modified rebar hole cleaning tool of this embodiment:

[0045] Step 1: Start motor 9.2 and air pump 8, insert outer tube 1 and inner tube 2 into the diameter hole. At this time:

[0046] The outer air vent 5 and the inner air vent 4 are staggered. The high-pressure gas output by the air pump 8 passes through the inner ring and the central air vent 3 and is blown towards the anchor hole to clean the anchor hole.

[0047] Motor 9.2 drives the outer tube 1 to rotate via the first gear 9.3 and the second gear 9.4. The outer tube 1 causes the rear tube 2.2 to rotate via the spiral groove 11 and the guide ball 10. The rear tube 2.2 causes the rear tube to rotate synchronously via the strip groove 2.3 and the strip block 2.4. At the same time, the outer tube 1 drives the cleaning brush 7 to rotate, thereby achieving the scraping operation on the side wall of the rebar hole and improving the hole cleaning effect.

[0048] Step 2: After inserting to the deepest position of the anchoring hole, with the front end of the inner spherical part 18 abutting the bottom of the anchoring hole:

[0049] First, turn off the motor 9.2, and continue to push the handle on the money bracket forward. The front bracket 9.1 moves forward on the outer tube 1 and compresses the second return spring 9.7, so that the first gear 9.3 separates from the second gear 9.4.

[0050] Pushing the handle on the slide plate 19 forward causes the air pump 8 to move forward, which in turn moves the rear tube 2.2 forward. The strip plate moves forward within the strip groove 2.3. Simultaneously, the guide ball 10 moves forward within the spiral groove 11 and applies force to it, causing the outer tube 1 to rotate. The plug 6 moves to the front end of the central air hole 3 and seals the front end of the central air hole 3. When the guide ball 10 moves to the front end of the spiral groove 11, the outer air hole 5 aligns and connects with the inner air hole 4, allowing the high-pressure airflow in the inner tube 2 to pass through the central air hole 3, the inner air hole 4, and the outer air hole 5 in sequence and be blown out. The blown airflow is tilted outward from the bottom of the anchor hole, allowing the dust and gravel in the anchor hole to be blown out more efficiently, improving the hole cleaning effect.

[0051] Meanwhile, in step two, since the cleaning brush 7 and the outer air hole 5 are staggered, the dust and gravel entering between two adjacent cleaning brushes 7 will be restricted between the two adjacent cleaning brushes 7 and will not move in the circumferential direction, further improving the cleaning effect.

[0052] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. A tool for cleaning rebar holes after secondary modification, characterized in that, The system includes an outer tube (1), an inner tube (2), a central air hole (3), an inner lateral air hole (4), an outer lateral air hole (5), a plug (6), a cleaning brush (7), an air pump (8), and a rotary drive assembly (9). The outer tube (1) is fitted over the inner tube (2). The central air hole (3) is located at the center of the front end of the inner tube (2). The inner lateral air holes (4) are equidistantly located on the side wall of the front end of the inner tube (2). The outer lateral air holes (5) are equidistantly located on the side wall of the front end of the outer tube (1). When the inner lateral air holes (4) and the outer lateral air holes (5) are staggered, the outer... Both the lateral air vent (5) and the inner lateral air vent (4) are closed. The inner end of the inner lateral air vent (4) is connected to the middle of the central air vent (3). The plug (6) is placed in the inner tube (2), and the plug (6) blocks the front end of the central air vent (3) by moving forward. The cleaning brush (7) is equidistantly placed on the surface of the outer tube (1), and the cleaning brush (7) and the outer lateral air vent (5) are staggered. The air pump (8) is connected to the rear end of the inner tube (2). The power end of the rotary drive assembly (9) is connected to the outer tube (1) and is used to drive the outer tube (1) to rotate.

2. The tool for cleaning rebar holes in secondary modification as described in claim 1, characterized in that, The inner tube (2) includes a front tube body (2.1) and a rear tube body (2.2) distributed in a front-to-back manner. The rear end of the rear tube body (2.2) is connected to the air pump (8), and the front end of the rear tube body (2.2) is slidably inserted into the rear end of the front tube body (2.1). Multiple guide balls (10) are fixed at equal intervals in the circumferential direction on the surface of the rear tube body (2.2). A spiral groove (11) is provided on the inner wall surface of the outer tube (1). The guide balls (10) are located in the spiral groove (11) and slide with it. The guide balls (10) move from the rear end to the front end of the spiral groove (11), so that the outer tube (1) rotates to the state where the outer air hole (5) is aligned with the inner air hole (4).

3. The tool for cleaning rebar holes in secondary modification as described in claim 2, characterized in that, The inner wall of the front tube (2.1) is provided with a plurality of centrally symmetrically distributed strip grooves (2.3), and the front end of the surface of the rear tube (2.2) is fixedly provided with a strip block (2.4) that slides with the strip grooves (2.3).

4. The tool for cleaning rebar holes in secondary modification as described in claim 2, characterized in that, The outer tube (1) has an annular groove (12) inside, and the surface of the rear tube (2.2) has an outer convex ring (13) that can move axially in the annular groove (12). A first return spring (14) is provided between the front end face of the outer convex ring (13) and the front end wall of the annular groove (12).

5. The tool for cleaning rebar holes in secondary modification as described in claim 2, characterized in that, The inner diameter of the central air hole (3) is smaller than the inner diameter of the inner tube. The rear end of the plug (6) is fixedly connected to a core rod (15), and the rear end of the core rod (15) is fixedly connected to the inner wall surface of the rear tube (2.2) through a connecting rod (16).

6. The tool for cleaning rebar holes in secondary modifications as described in claim 1, characterized in that, The outer tube (1) and the inner tube (2) are respectively provided with an outer spherical part (17) and an inner spherical part (18) at their front ends. The central air hole (3) is located at the center of the inner spherical part (18). The inner lateral air hole (4) and the outer lateral air hole (5) are respectively located on the sidewalls of the inner spherical part (18) and the outer spherical part (17). The front end of the inner spherical part (18) extends from the front end of the outer spherical part (17).

7. The tool for cleaning rebar holes in secondary modification as described in claim 1, characterized in that, Both the inner vent (4) and the outer vent (5) are inclined backward at their outer ends.

8. The tool for cleaning rebar holes in secondary modification as described in claim 1, characterized in that, The rotary drive assembly (9) includes a front bracket (9.1), a motor (9.2), a first gear (9.3), and a second gear (9.4). The front bracket (9.1) is sleeved on the outside of the outer tube (1) and can slide axially on the outer tube (1). The motor (9.2) is mounted on the front bracket (9.1). The first gear (9.3) is rotatably mounted on the front bracket (9.1) and the power output end of the motor (9.2) is connected to the first gear (9.3). The second gear (9.4) is fixedly sleeved on the surface of the outer tube (1). The front bracket (9.1) moves forward on the outer tube (1) to separate the first gear (9.3) from the second gear (9.4).

9. The tool for cleaning rebar holes in secondary modifications as described in claim 8, characterized in that, The front support (9.1) has a front circular hole (9.5) and a rear circular hole (9.6) respectively on the top of its front and rear sides. The inner wall of the front circular hole (9.5) is in contact with the outer tube (1). The inner diameter of the rear circular hole (9.6) is larger than the outer diameter of the second gear (9.4). A second return spring (9.7) is provided between the front side of the front support (9.1) and the outer tube (1).

10. A tool for cleaning rebar holes in secondary modifications as described in claim 8, characterized in that, The air pump (8) has a slide plate (19) at its bottom, and a rear support (20) is slidably mounted on the bottom of the slide plate (19). The rear support (20) is fixed to the rear end of the front support (9.1), and both the front support (9.1) and the slide plate (19) have handles (21) at their bottoms.

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