Reamer capable of rapidly replacing cutting and expanding teeth

Abstract

The reamer comprises a reamer body, a drill bit is installed at the lower end of the reamer body, a gear ring is connected to the outer portion of the lower end of the reamer body in a sleeved mode, a positioning clamping plate is installed on the outer portion of the gear ring in an annular mode, cutting and expanding teeth are fixedly installed on the outer portion of the positioning clamping plate, and the cutting and expanding teeth are fixedly installed on the outer portion of the positioning clamping plate. And a connecting column is fixedly mounted at the upper end of the reamer main body. According to the reamer, the gear ring and the reamer main body are rapidly connected through the positioning ring sleeve, the inserting rod and other structures, when the gear ring is abraded or damaged, the gear ring can be separated from the reamer main body only by pulling out the inserting rod and detaching the arc-shaped mounting plate, the whole reamer does not need to be detached, the replacement time is greatly shortened, and the replacement efficiency is improved. Due to the fact that the gear ring can be independently detached and replaced, when the gear ring is partially damaged, the gear ring with the high price does not need to be replaced, only the abraded gear ring needs to be replaced, and the equipment maintenance cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of hole expander technology, specifically a quick-change toothed hole expander. Background Technology

[0002] In the field of machining, reamers are commonly used tools to enlarge the diameter of existing holes. They are widely used in industries such as metal processing, wood processing, and construction. Traditionally, the cutting and expanding teeth of reamers are usually fixed to the gear ring by welding and casting. Although existing devices can replace the cutting and expanding teeth, the installation of the gear ring and the reamer is complicated. Since the gear ring and the reamer are usually designed as a single unit, they cannot be disassembled independently when damaged. When the cutting and expanding teeth wear down due to long-term use, it is necessary to use special tools to disassemble the entire gear ring or even disassemble the main body of the reamer. The operation steps are cumbersome and affect subsequent use. Utility Model Content

[0003] The purpose of this utility model is to provide a quick-change toothed reamer with the advantage of being able to independently disassemble the toothed ring and the reamer.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a quick-change reamer with cutting and reaming teeth, comprising a reamer body, a drill bit mounted on the lower end of the reamer body, a toothed ring sleeved on the outer side of the lower end of the reamer body, a positioning plate annularly mounted on the outer side of the toothed ring, cutting and reaming teeth fixedly mounted on the outer side of the positioning plate, a connecting post fixedly mounted on the upper end of the reamer body, an external thread provided on the outer side of the upper end of the reamer body, an arc-shaped mounting plate mounted on the outer thread of the external thread, a positioning ring fixedly mounted on the lower end of the arc-shaped mounting plate, the lower end of the positioning ring connecting to the upper end of the toothed ring, and a connecting rod inserted into the interior of the positioning ring.

[0005] As a preferred embodiment, a connecting slot is longitudinally formed inside the upper end of the hole expander body and above the external thread. A positioning protrusion is symmetrically engaged inside the connecting slot. An arc-shaped clamping plate is installed at the outer end of the positioning protrusion. The lower end of the arc-shaped clamping plate is engaged with the upper end of the arc-shaped mounting plate.

[0006] As a preferred embodiment, the front and rear sides of the upper end of the hole expander body are provided with insertion holes, and a vertical insertion rod is inserted into the insertion hole. The lower end of the vertical insertion rod passes through the insertion hole and is engaged with the inside of the positioning protrusion.

[0007] As a preferred embodiment, a lower positioning ring is fitted onto the outer side of the lower end of the hole expander body, and the upper end of the lower positioning ring is fastened to the lower end of the toothed ring.

[0008] As a preferred embodiment, fastening plates are installed on both sides of the positioning plate by screws, and the inner end of the fastening plate is connected to the side of the cutting and expanding teeth.

[0009] As a preferred embodiment, the inner wall of the arc-shaped mounting plate is provided with internal threads, and the arc-shaped mounting plate is distributed in a ring shape on the outside of the hole expander body.

[0010] As a preferred embodiment, a through groove is longitudinally formed inside the upper end of the hole expander body, and the middle end of the plug rod passes through the through groove and extends to the outside.

[0011] As a preferred embodiment, a connecting block is installed between the lower end of the arc-shaped card plate and the upper end of the arc-shaped mounting plate, and the lower end of the connecting block is engaged in a groove inside the arc-shaped mounting plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The toothed ring of this reamer is quickly connected to the reamer body via a positioning ring and a connecting rod. When the toothed ring is worn or damaged, simply pull out the connecting rod and remove the arc-shaped mounting plate to separate the toothed ring from the reamer body. This eliminates the need to disassemble the entire reamer, significantly reducing replacement time and improving work efficiency. Since the toothed ring can be independently disassembled and replaced, when the toothed ring is damaged, it is not necessary to replace the more expensive toothed ring; only the worn toothed ring needs to be replaced, greatly reducing equipment maintenance costs. At the same time, the reamer cutting teeth are connected to the toothed ring using a positioning clip, and independent replacement also reduces unnecessary component wear, further reducing overall operating costs. The independently disassembled toothed ring and reamer cutting teeth facilitate comprehensive and detailed inspection by staff, allowing for timely detection and repair of potential problems. This design also facilitates the maintenance of the reamer body, as the toothed ring does not interfere with inspection or repair, making maintenance work smoother and more efficient.

[0014] 2. This utility model provides an additional support point for the gear ring by fastening the lower positioning ring to the lower end of the gear ring. Together with the upper positioning ring, it forms a double fixation, which greatly enhances the stability of the gear ring and the main body of the reamer. During the reaming operation, the gear ring is not prone to axial displacement or radial wobbling when facing complex cutting forces and vibrations, ensuring the accuracy of the reaming dimensions and extending the overall service life of the reamer. Attached Figure Description

[0015] Figure 1 This is a first-view perspective structural perspective view of the present invention;

[0016] Figure 2 This is a second-view perspective structural perspective view of the present invention;

[0017] Figure 3This is a partial structural cross-sectional view of the present invention;

[0018] Figure 4 This is a partial three-dimensional view of the positioning plate of this utility model.

[0019] In the diagram: 1. Reamer body; 2. Drill bit; 3. Gear ring; 4. Positioning plate; 5. Fastening plate; 6. Reaming teeth; 7. Connecting post; 8. External thread; 9. Arc-shaped mounting plate; 10. Positioning ring; 11. Insert rod; 12. Connecting slot; 13. Arc-shaped plate; 14. Positioning protrusion; 15. Vertical insert rod; 16. Lower positioning ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0022] Example 1:

[0023] Please see Figure 1 As shown, this utility model provides a quick-change reamer with cutting and reaming teeth, including a reamer body 1, a drill bit 2 installed at the lower end of the reamer body 1, a toothed ring 3 sleeved on the outer side of the lower end of the reamer body 1, a positioning plate 4 annularly installed on the outer side of the toothed ring 3, cutting and reaming teeth 6 fixedly installed on the outer side of the positioning plate 4, a connecting post 7 fixedly installed at the upper end of the reamer body 1, an external thread 8 provided on the outer side of the upper end of the reamer body 1, an arc-shaped mounting plate 9 installed on the outer thread of the external thread 8, a positioning ring sleeve 10 fixedly installed at the lower end of the arc-shaped mounting plate 9, the lower end of the positioning ring sleeve 10 connected to the upper end of the toothed ring 3, and a plug rod 11 inserted inside the positioning ring sleeve 10.

[0024] In this technical solution, the toothed ring 3 of the reamer and the reamer body 1 are quickly connected through a positioning ring 10, a plug-in rod 11 and other structures. When the toothed ring 3 is worn or damaged, it is only necessary to pull out the plug-in rod 11 and remove the arc-shaped mounting plate 9 to separate the toothed ring 3 from the reamer body 1. There is no need to disassemble the entire reamer, which greatly shortens the replacement time and significantly improves work efficiency. Since the toothed ring 3 can be disassembled and replaced independently, when part of the toothed ring 3 is damaged, it is not necessary to replace the more expensive toothed ring 3. Only the worn toothed ring 3 needs to be replaced, which greatly reduces the equipment maintenance cost.

[0025] Meanwhile, the reaming tooth 6 is connected to the toothed ring 3 using a positioning clamp 4. Independent replacement reduces unnecessary component wear and further lowers the overall operating cost. The independently detachable toothed ring 3 and reaming tooth 6 facilitate comprehensive and detailed inspection by staff, enabling timely detection and repair of potential problems. This design also facilitates the maintenance of the reamer body 1. When inspecting or repairing the body, it will not be interfered with by the toothed ring 3, making maintenance work smoother and more efficient.

[0026] Example 2:

[0027] Based on Embodiment 1, this utility model is as follows: Figure 2 As shown, a connecting slot 12 is longitudinally formed inside the upper end of the reamer body 1 and above the external thread 8. A positioning protrusion 14 is symmetrically engaged inside the connecting slot 12. An arc-shaped clamping plate 13 is installed on the outer end of the positioning protrusion 14. The lower end of the arc-shaped clamping plate 13 is engaged with the upper end of the arc-shaped mounting plate 9. Insertion holes are formed on both the front and rear sides of the upper end of the reamer body 1. A vertical insertion rod 15 is inserted into the insertion hole. The lower end of the vertical insertion rod 15 passes through the insertion hole and is engaged with the inside of the positioning protrusion 14.

[0028] Adopting such Figure 1 The technical solution shown, combining the connecting slot 12, positioning protrusion 14, arc-shaped clamping plate 13, and vertical insertion rod 15, constructs a multi-level stable connection system. The clamping of the arc-shaped clamping plate 13 with the arc-shaped mounting plate 9, and the vertical insertion rod 15 passing through the insertion hole and being inserted into the positioning protrusion 14, make the connection between the hole expander body 1 and the upper component tighter. During hole expansion operations, it can effectively resist external forces such as torsion and vibration, prevent components from loosening or falling off, and ensure the safety and accuracy of hole expansion operations. During installation, no complicated tools or operating steps are required, and component assembly can be completed quickly. During disassembly, simply pulling out the vertical insertion rod 15 can easily separate the relevant components. Compared with traditional fastening methods, it greatly improves the efficiency of installation and disassembly, and facilitates the daily maintenance of the equipment and component replacement.

[0029] Secondly, in the technical solution, a lower positioning ring 16 is sleeved on the lower end of the hole expander body 1, and the upper end of the lower positioning ring 16 is fastened to the lower end of the toothed ring 3; fastening plates 5 are installed on both sides of the positioning plate 4 by screws, and the inner end of the fastening plate 5 is connected to the side of the cutting and expanding teeth 6.

[0030] Its adoption is as follows Figure 1 The technical solution shown has the lower positioning ring 16 fastened to the lower end of the gear ring 3, providing an additional support point for the gear ring 3. Together with the upper positioning ring sleeve 10, it forms a double fixation, which greatly enhances the stability of the gear ring 3 and the sleeve part of the reamer body 1. In the reaming operation, facing complex cutting forces and vibrations, the gear ring 3 is not prone to axial displacement or radial wobbling, ensuring the accuracy of the reaming dimensions and extending the overall service life of the reamer.

[0031] Example 3:

[0032] This utility model is as follows Figures 1-4 As shown, the inner wall of the arc-shaped mounting plate 9 is provided with internal threads, and the arc-shaped mounting plate 9 is distributed in a ring shape on the outside of the reamer body 1; a through groove is longitudinally opened in the upper end of the reamer body 1, and the middle end of the plug rod 11 passes through the through groove and extends to the outside; a connecting block is installed between the lower end of the arc-shaped clamping plate 13 and the upper end of the arc-shaped mounting plate 9, and the lower end of the connecting block is engaged in the groove inside the arc-shaped mounting plate 9.

[0033] Using the above technical solution, the internal thread of the inner wall of the arc-shaped mounting plate 9 and the external thread 8 of the reamer body 1 cooperate to form a ring-shaped threaded connection structure. This design increases the thread contact area, improves the preload and anti-loosening performance of the connection, effectively prevents the arc-shaped mounting plate 9 from loosening during high torque operation, and ensures the axial constraint effect of the positioning ring sleeve 10 on the gear ring 3.

[0034] The working principle of this utility model is as follows: When it is necessary to disassemble the cutting and expanding teeth 6, simply remove the screws on the surface of the fastening plate 5 to quickly disassemble the cutting and expanding teeth 6; when it is necessary to disassemble the toothed ring 3, first move the vertical insert rod 15 out of the insertion hole and the positioning protrusion 14, then move the arc-shaped plate 13 upward so that the connecting block at its lower end moves out of the groove inside the arc-shaped mounting plate 9, then rotate the arc-shaped mounting plate 9 and simultaneously drive the positioning ring sleeve 10 to rotate together outside the external thread 8, so that the toothed ring 3 and the positioning ring sleeve 10 can be moved out of the outside of the expanding body 1, thus realizing the independent disassembly of the toothed ring 3 and the cutting and expanding teeth 6.

[0035] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0036] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A quick-change reamer with changing cutting teeth, comprising a reamer body (1), characterized in that: A drill bit (2) is installed at the lower end of the reamer body (1). A toothed ring (3) is sleeved on the outside of the lower end of the reamer body (1). A positioning plate (4) is installed on the outside of the toothed ring (3). A cutting tooth (6) is fixedly installed on the outside of the positioning plate (4). A connecting column (7) is fixedly installed at the upper end of the reamer body (1). An external thread (8) is provided on the outside of the upper end of the reamer body (1). An arc-shaped mounting plate (9) is installed on the external thread of the external thread (8). A positioning ring (10) is fixedly installed at the lower end of the arc-shaped mounting plate (9). The lower end of the positioning ring (10) is connected to the upper end of the toothed ring (3). A plug rod (11) is inserted inside the positioning ring (10).

2. The quick-change toothed reamer according to claim 1, characterized in that: The upper end of the hole expander body (1) has a longitudinally formed connecting slot (12) located above the external thread (8). The connecting slot (12) is symmetrically fitted with positioning protrusions (14). The outer end of the positioning protrusions (14) is fitted with an arc-shaped clamping plate (13). The lower end of the arc-shaped clamping plate (13) is fitted with the upper end of the arc-shaped mounting plate (9).

3. The quick-change toothed reamer according to claim 1, characterized in that: The front and rear sides of the upper end of the hole expander body (1) are provided with insertion holes, and a vertical insertion rod (15) is inserted into the insertion hole. The lower end of the vertical insertion rod (15) passes through the insertion hole and is snapped into the interior of the positioning protrusion (14).

4. A quick-change toothed reamer according to claim 1, characterized in that: A lower positioning ring (16) is sleeved on the lower end of the hole expander body (1), and the upper end of the lower positioning ring (16) is fastened to the lower end of the toothed ring (3).

5. A quick-change toothed reamer according to claim 1, characterized in that: Both sides of the positioning plate (4) are fitted with fastening plates (5) by screws, and the inner end of the fastening plates (5) is connected to the side of the cutting and expanding teeth (6).

6. A quick-change toothed reamer according to claim 1, characterized in that: The inner wall of the arc-shaped mounting plate (9) is provided with internal threads, and the arc-shaped mounting plate (9) is distributed in a ring shape on the outside of the hole expander body (1).

7. A quick-change reamer with cutting teeth according to claim 1, characterized in that: The upper end of the expander body (1) has a longitudinal through groove, and the middle end of the plug rod (11) passes through the through groove and extends to the outside.

8. A quick-change toothed reamer according to claim 2, characterized in that: A connecting block is installed between the lower end of the arc-shaped card plate (13) and the upper end of the arc-shaped mounting plate (9), and the lower end of the connecting block is engaged in the groove inside the arc-shaped mounting plate (9).

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