External thread repairer and method of using the same

Abstract

The present invention discloses an external thread repairer and a method for using the same, and belongs to the technical field of external thread repair; wherein, the external thread repairer comprises a repairer body, an outer ring is welded on the inner side wall of the repairer body, and an inner ring is slidably connected to the inner side of the outer ring, a workpiece insertion hole is provided at the center of the outer ring, the inner ring and the repairer body, a self-centering bracket is installed on the top of the outer ring through a hinge shaft, the front end of the self-centering bracket extends to the position of the workpiece insertion hole and is installed with a roller, a labor-saving box is welded on the outer side of the bearing, and a small gear disc meshing with the large gear disc is sleeved on the rotating shaft at the position of the large gear disc. The present invention adjusts the depth of the cut-in by sliding the second rotating handle along the slide groove, and at the same time, the diameter of the small gear disc is smaller than the diameter of the large gear disc, and the principle of more labor-saving by driving the large gear to rotate with the small gear is used to reduce the rotation force in the process of external thread repair, reduce labor intensity, and is easy to use.

Description

Technical Field

[0001] The invention relates to the technical field of external thread repair, and in particular to an external thread repair device and a use method thereof. Background Art

[0002] A bolt is a mechanical part, a cylindrical threaded fastener that is matched with a nut. It is a type of fastener consisting of a head and a screw (a cylinder with external threads). It must be matched with a nut to fasten two parts with through holes. This type of connection is called a bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

[0003] Threaded connections are widely used in production. Thread collisions often occur during use, resulting in the inability to screw in the matching internal threads. Or due to improper operation, unqualified external threads enter the assembly stage and can only be scrapped. If repair is required, it can only be done by manual filing, and the repair accuracy is difficult to meet the requirements, and it is time-consuming and labor-intensive. The present invention can utilize the geometric accuracy of the tool to achieve multiple advantages such as repairing external threads of various specifications. Summary of the invention

[0004] 1. Technical problems to be solved

[0005] The technical problem to be solved by the present invention is to provide an external thread repairer and a method of using the same, wherein the second rotating handle is slid along the slide groove to adjust the cutting depth, and at the same time, the diameter of the small gear plate is smaller than the diameter of the large gear plate, and the small gear is used to drive the large gear to rotate more labor-savingly, thereby reducing the rotational force during the external thread repair process, reducing labor intensity, and being easy to use.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] The present invention specifically provides an external thread repairer, comprising a repairer body, an outer ring is welded on the inner side wall of the repairer body, and the inner side of the outer ring is slidably connected to the inner side of the outer ring, a workpiece insertion hole is provided at the center position of the outer ring, the inner ring and the repairer body, a self-centering bracket is installed on the top of the outer ring through a hinge shaft, and the self-centering bracket has three self-centering brackets distributed at equal intervals with the outer ring as the center of the circle, the front ends of the self-centering brackets all extend to the position of the workpiece insertion hole and are installed with rollers, a reset spring is connected to the hinge shaft position of one of the self-centering brackets, a handle is fixed on the inner ring, and one end of the handle extends to the outside of the repairer body, a sliding groove for the handle to slide is provided at the handle position, and the reset spring The other end of the spring is fixed to the top of the handle, and a thread cutter is inserted into the bottom of the side of the repairer body, and the blade position of the thread cutter extends to the position of the workpiece insertion hole, and a sliding groove is provided at the bottom of the repairer body at the position of the thread cutter, and a second rotating handle is slidably connected to the position of the second rotating handle, and the second rotating handle is threadedly connected to the thread cutter through a bolt, and the outer side of the repairer body is sequentially sleeved with bearings and a large gear plate from high to low, and a labor-saving box is welded to the outer side of the bearing, and a rotating shaft is vertically installed inside the labor-saving box, and a small gear plate meshing with the large gear plate is sleeved on the rotating shaft at the position of the large gear plate, and one end of the rotating shaft extends to the top of the labor-saving box and is sleeved with the first rotating handle.

[0009] Preferably, the inner ring is assembled on the outer ring using 6φmm balls.

[0010] Preferably, the diameter of the small gear plate is smaller than the diameter of the large gear plate.

[0011] Preferably, the bottom surface of the labor-saving box is higher than the top surface of the handle.

[0012] Preferably, the roller is installed at the front end of the self-centering bracket, and the self-centering bracket is installed in the threaded holes corresponding to the inner ring and the outer ring.

[0013] The present invention also provides a method for using the external thread repairer, which comprises the following steps:

[0014] (1) The thread to be repaired with bumps and scratches is passed through the workpiece insertion hole at the center of the outer ring and the inner ring, and the handle is manually turned. Under the action of the reset spring, the thread to be repaired is positioned by the roller and the self-centering bracket;

[0015] (2) Then, insert the thread cutter into the bottom end of the repairer body, slide it along the slide groove by the second rotating handle, adjust the cutting depth, and then rotate the second rotating handle to limit and fix it, and lock the fastening screws on the outer ring and the inner ring to ensure that the outer ring and the inner ring do not rotate relative to each other;

[0016] (3) Then, manually rotate the first rotating handle to drive the rotating shaft to rotate, so that the small gear plate inside the labor-saving box rotates, and the small gear plate and the large gear plate are meshed with each other to achieve the large gear plate being driven to rotate during the rotation of the small gear plate. At the same time, the large gear plate is sleeved on the outside of the repairer body, and the labor-saving box is installed on the outside of the repairer body through the bearing, so that when the small gear plate drives the large gear plate and the repairer body to rotate, the labor-saving box does not rotate with the repairer body. During the rotation of the repairer body, a thread cutter is used to pass through the thread to be repaired, so as to achieve the repair of the angle and size of the external thread.

[0017] 3. Beneficial effects

[0018] The present invention passes the thread to be repaired with bumps and scratches through the workpiece insertion hole at the center of the outer ring and the inner ring, and manually turns the handle. Under the action of the reset spring, the thread to be repaired is positioned through the roller and the self-centering bracket, and then the thread cutter is inserted into the bottom end of the repairer body, and then the second rotating handle is used to slide along the slide groove to adjust the cutting depth.

[0019] The invention limits and fixes the position by rotating the second rotating handle, locks the fastening screws on the outer ring and the inner ring, and ensures that the outer ring and the inner ring do not rotate relative to each other. Subsequently, the first rotating handle is manually rotated, and the rotating shaft is driven to rotate at the same time, so that the small gear plate inside the labor-saving box rotates. At the same time, the small gear plate and the large gear plate are meshed with each other to achieve the driving of the large gear plate to rotate during the rotation of the small gear plate. At the same time, the large gear plate is sleeved on the outside of the repairer body, and the labor-saving box is installed on the outside of the repairer body through the bearing. In the process of the small gear plate driving the large gear plate and the repairer body to rotate, the labor-saving box does not rotate with the repairer body. In the process of the rotation of the repairer body, a thread cutter is used to pass through the thread to be repaired, so that the angle and size of the external thread can be repaired. At the same time, in the process of repairing the external thread, the diameter of the small gear plate is smaller than the diameter of the large gear plate. The principle of more labor-saving is used to reduce the rotation force in the process of repairing the external thread, reduce the labor intensity, and is easy to use.

[0020] In summary, the present invention adjusts the cutting depth by sliding the second rotating handle along the slide groove. At the same time, the diameter of the small gear plate is smaller than the diameter of the large gear plate. The small gear is used to drive the large gear to rotate more labor-savingly, thereby reducing the rotational force during the external thread repair process, reducing labor intensity, and being easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view schematic diagram of the internal structure of the present invention;

[0022] Figure 2It is a schematic diagram of the bottom structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the external structure of the present invention from a top view.

[0024] Figure numerals: 1. workpiece insertion hole; 2. roller; 3. outer ring; 4. inner ring; 5. reset spring; 6. handle; 7. thread cutter; 8. self-centering bracket; 9. first rotating handle; 10. repairer body; 11. labor-saving box; 12. large gear plate; 13. bearing; 14. slide groove; 15. second rotating handle; 16. small gear plate; 17. rotating shaft. DETAILED DESCRIPTION

[0025] The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce the invention.

[0026] Example

[0027] like Figure 1-3 As shown, the external thread repairer includes a repairer body 10, an outer ring 3 is welded on the inner wall of the repairer body 10, and the inner side of the outer ring 3 is slidably connected with the inner ring 4, a workpiece insertion hole 1 is opened at the center position of the outer ring 3, the inner ring 4 and the repairer body 10, a self-centering bracket 8 is installed on the top of the outer ring 3 through a hinge shaft, and the self-centering bracket 8 has three self-centering brackets 8 distributed at equal intervals with the outer ring 3 as the center, the front ends of the self-centering brackets 8 all extend to the position of the workpiece insertion hole 1 and are installed with rollers 2, a reset spring 5 is connected to the hinge shaft position of a self-centering bracket 8, and a handle 6 is fixed on the inner ring 4, and one end of the handle 6 extends to the outside of the repairer body 10, a slide groove for the handle 6 to slide is opened at the position of the handle 6, the other end of the reset spring 5 is fixed to the top of the handle 6, a thread cutter 7 is inserted at the bottom of the side of the repairer body 10, and the blade position of the thread cutter 7 extends to the position of the workpiece insertion hole 1 A slide groove 14 is provided at the bottom of the repairer body 10 at the position of the thread cutter 7, and a second rotating handle 15 is slidably connected at the position of the second rotating handle 15. The second rotating handle 15 is threadedly connected to the thread cutter 7 through a bolt. The outer side of the repairer body 10 is sequentially sleeved with a bearing 13 and a large gear disk 12 from high to low, and a labor-saving box 11 is welded to the outer side of the bearing 13. A rotating shaft 17 is vertically installed inside the labor-saving box 11. A small gear disk 16 that meshes with the large gear disk 12 is sleeved on the rotating shaft 17 at the position of the large gear disk 12. One end of the rotating shaft 17 extends to the top of the labor-saving box 11 and is sleeved with a first rotating handle 9. The inner ring 4 is assembled on the outer ring 3 using a φ6mm ball. The diameter of the small gear disk 16 is smaller than the diameter of the large gear disk 12. The bottom surface of the labor-saving box 11 is higher than the top surface of the handle 6. The roller 2 is installed at the front end of the self-centering bracket 8, and the self-centering bracket 8 is installed in the threaded holes corresponding to the inner ring 4 and the outer ring 3.

[0028] The specific working principle of the above-mentioned external thread repairer is:

[0029] First, the thread to be repaired with bumps and scratches is passed through the workpiece insertion hole 1 at the center of the outer ring 3 and the inner ring 4, and the handle 6 is manually turned. Under the action of the reset spring 5, the thread to be repaired is positioned through the roller 2 and the self-centering bracket 8, and then the thread cutter 7 is inserted into the bottom end of the repairer body 10, and then the second rotating handle 15 is slid along the slide groove 14 to adjust the cutting depth, and then the second rotating handle 15 is rotated to limit and fix, and the fastening screws on the outer ring 3 and the inner ring 4 are locked to ensure that the outer ring 3 and the inner ring 4 do not rotate relative to each other, and then the first rotating handle 9 is manually rotated to drive the rotating shaft 17 to rotate, so that the small gear plate 16 inside the labor-saving box 11 rotates, and at the same time, the small gear plate 16 and the large gear plate 12 are meshed with each other. The large gear plate 12 is driven to rotate during the rotation of the small gear plate 16. At the same time, the large gear plate 12 is sleeved on the outside of the repairer body 10, and the labor-saving box 11 is installed on the outside of the repairer body 10 through the bearing 13, so that during the rotation of the repairer body 10, the large gear plate 12 and the repairer body 10 are driven by the small gear plate 16. The labor-saving box 11 does not rotate with the repairer body 10, so that during the rotation of the repairer body 10, the thread cutter 7 is used to pass through the thread to be repaired to achieve the repair of the angle and size of the external thread. At the same time, during the repair of the external thread, the diameter of the small gear plate 16 is smaller than the diameter of the large gear plate 12. The principle of saving more effort by driving the large gear to rotate with the small gear is used to reduce the rotational force during the external thread repair process, reduce labor intensity, and facilitate use.

[0030] From the above content, it can be known that the present invention adjusts the cutting depth by sliding the second rotating handle 15 along the slide groove 14. At the same time, the diameter of the small gear plate 16 is smaller than the diameter of the large gear plate 12. The small gear drives the large gear to rotate more labor-savingly, thereby reducing the rotational force during the external thread repair process, reducing labor intensity, and facilitating use.

[0031] The terms used in the present invention are illustrative and exemplary, rather than restrictive. Since the present invention can be implemented in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. An external thread repairer, characterized in that: The invention comprises a repair device body (10), wherein an outer ring (3) is welded on the inner side wall of the repair device body (10), and an inner ring (4) is slidably connected to the inner side of the outer ring (3), and a workpiece insertion hole (1) is provided at the center of the outer ring (3), the inner ring (4) and the repair device body (10); a self-centering bracket (8) is installed on the top of the outer ring (3) through a hinge shaft, and three self-centering brackets (8) are evenly distributed around the outer ring (3) as the center, and the front ends of the self-centering brackets (8) all extend to the position of the workpiece insertion hole (1) and are installed with rollers (2); a reset spring (5) is connected to the hinge shaft position of one of the self-centering brackets (8), and a handle (6) is fixed on the inner ring (4), and one end of the handle (6) extends to the outside of the repair device body (10), and a slide groove for the handle (6) to slide is provided at the position of the handle (6); the other end of the reset spring (5) is fixed to the handle (6) The top of the repairer body (10) is provided with a thread cutter (7) inserted into the bottom of the side of the repairer body (10), and the blade position of the thread cutter (7) extends to the position of the workpiece insertion hole (1). A slide groove (14) is provided at the bottom of the repairer body (10) at the position of the thread cutter (7). A second rotating handle (15) is slidably connected at the position of the slide groove (14). The second rotating handle (15) is threadedly connected to the thread cutter (7) through a bolt. The outer side of the repairer body (10) is provided with a bearing (13) and a large gear plate (12) in sequence from high to low. A labor-saving box (11) is welded to the outer side of the bearing (13). A rotating shaft (17) is vertically installed inside the labor-saving box (11). A small gear plate (16) meshing with the large gear plate (12) is provided on the rotating shaft (17) at the position of the large gear plate (12). One end of the rotating shaft (17) extends to the top of the labor-saving box (11) and is provided with a first rotating handle (9).

2. The external thread repair device according to claim 1, characterized in that: The inner ring (4) is assembled on the outer ring (3) using a φ6 mm ball.

3. The external thread repairer according to claim 1, characterized in that: The diameter of the small gear plate (16) is smaller than the diameter of the large gear plate (12).

4. The external thread repairer according to claim 1, characterized in that: The bottom surface of the labor-saving box (11) is higher than the top surface of the handle (6).

5. The external thread repairer according to claim 1, characterized in that: The roller (2) is mounted on the front end of the self-centering bracket (8), and the self-centering bracket (8) is mounted in threaded holes corresponding to the inner ring (4) and the outer ring (3).

6. The method for using the external thread repair device according to any one of claims 1 to 5, characterized in that: The steps include: 1) The thread to be repaired with bumps and scratches is passed through the workpiece insertion hole (1) at the center of the outer ring (3) and the inner ring (4), and the handle (6) is manually turned, and under the action of the return spring (5), the thread to be repaired is positioned by the roller (2) and the self-centering bracket (8); 2) Then, the thread cutter (7) is inserted into the bottom end of the repairer body (10), and then the second rotating handle (15) is used to slide along the slide groove (14) to adjust the cutting depth, and then the second rotating handle (15) is rotated to limit and fix, and the fastening screws on the outer ring (3) and the inner ring (4) are locked to ensure that the outer ring (3) and the inner ring (4) do not rotate relative to each other; 3) Then, the first rotating handle (9) is manually rotated, and the rotating shaft (17) is driven to rotate, so that the small gear plate (16) inside the labor-saving box (11) is rotated. At the same time, the small gear plate (16) and the large gear plate (12) are meshed with each other, so that the large gear plate (12) is driven to rotate during the rotation of the small gear plate (16). At the same time, the large gear plate (12) is sleeved on the outside of the repairer body (10), and the labor-saving box (11) is installed on the outside of the repairer body (10) through the bearing (13), so that when the small gear plate (16) drives the large gear plate (12) and the repairer body (10) to rotate, the labor-saving box (11) does not rotate with the repairer body (10). During the rotation of the repairer body (10), the thread cutter (7) is used to pass through the thread to be repaired, so that the angle and size of the external thread can be repaired.

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