Thread cutter with lengthened structure

Abstract

The utility model belongs to the technical field of threaded cutters, particularly relates to a threaded cutter with a lengthening structure, and aims to solve the problem that the conventional reverse threaded connection is easy to be damaged due to over-screwing and over-screwing, the following scheme is provided: the threaded cutter comprises a cutter bar, a cutter body is fixed below the cutter bar, and the lengthening mechanism is arranged in the cutter bar; the lengthening mechanism comprises a lengthening rod, the lengthening rod is arranged at the top end of the cutter bar, the bottom end of the lengthening rod is connected with a limiting rod fixed through a rod, the limiting rod slides along a sliding groove formed in the containing groove, and after the length of the threaded cutter needs to be lengthened is adjusted, the limiting rod is rotated clockwise to penetrate into a positioning groove for limiting; due to the fact that cutting of the threaded cutter is clockwise, the power end can clamp the lengthening rod to drive the cutter bar and the cutter body below to cut, the situation of loosening or over-screwing is avoided, the threaded sleeve is matched to be in threaded connection between the cutter bar and the lengthening rod, the connection stability is further improved, and loosening is avoided.

Description

Technical Field

[0001] This utility model relates to a thread cutting tool, specifically a thread cutting tool with an extended structure, and belongs to the field of thread cutting tool technology. Background Technology

[0002] A thread cutter is a tool used to process threads. It is a type of cutting tool and consists of a cutter body and a cutter head. It is generally used on tapping machines for thread cutting and has a wide range of applications, including machinery manufacturing and vehicle manufacturing.

[0003] In the prior art, such as the deep hole forming milling cutter with a detachable extension rod disclosed in CN210996744U, the internal thread of the extension rod at the bottom end of the cutter shank is threadedly screwed into the threaded connector at the top end of the extension rod body, which facilitates the screwing in of the extension rod. The internal thread of the extension rod at the bottom end of the extension rod body is threadedly screwed into the threaded connector at the top end of the inner rod of the clamping column, which facilitates the fixing of the extension rod. The direction of the thread screwing in between the milling cutter shank, the extension rod body, and the inner rod of the clamping column is opposite to the direction of the milling cutter, to prevent the force generated during milling from unscrewing the threaded connection.

[0004] However, in implementing the relevant technology, the following problems were found in the deep hole forming milling cutter with a detachable extension rod designed above: In the prior art, the extension rod threaded connector and other components are made to cooperate with each other by means of reverse thread, which can be used to extend the cutting tool. However, in the actual use, the cutting tool is driven by the power end to rotate against the working surface. If the reverse thread connection method is used, over-tightening may occur, which may cause damage and thus affect the quality of the cutting tool. In view of this, a thread cutting tool with an extended structure is provided to overcome the above defects. Utility Model Content

[0005] This invention addresses the problem of over-tightening leading to damage when using a reverse thread connection, thus affecting the quality of the cutting tool, by providing a thread cutting tool with an extended structure.

[0006] The present invention achieves the above objectives through the following technical solution: a thread cutting tool with an extended structure, including a tool shank, a tool body fixed below the tool shank, and an extended mechanism provided inside the tool shank;

[0007] The extension mechanism includes an extension rod, which is located at the top of the tool bar. The tool bar has an internal mounting groove. A connecting rod is fixed at the bottom of the extension rod corresponding to the mounting groove. Limiting rods are fixed on both sides of the lower outer wall of the connecting rod. Sliding grooves are formed on both sides of the mounting groove corresponding to the limiting rods. A positioning groove is formed on one side of the sliding groove. A threaded sleeve is slidably connected to the outside of the tool bar.

[0008] As a further improvement of this utility model: the positioning groove and the sliding groove are perpendicular to each other, and the sliding groove and the limiting rod form a sliding structure.

[0009] As a further embodiment of this utility model: the threaded sleeve is threadedly connected to the tool holder, and the threaded sleeve is also threadedly connected to the extension rod.

[0010] As a further improvement of this utility model: a through-hole is provided on the lower side of one side of the outer wall of the tool holder, and a limit mechanism is provided inside the through-hole.

[0011] As a further embodiment of this utility model: the limiting mechanism includes a rotating plate, the rotating plate extends through the interior of the through-groove, a limiting frame is fixed inside the placement groove corresponding to the position of the rotating plate, and a connecting hole is provided inside the rotating plate.

[0012] As a further embodiment of this utility model: the limiting mechanism further includes a threaded rod, which is slidably connected inside the connecting hole, and the top end of the threaded rod is fixed with an abutment plate, and the bottom end of the threaded rod is slidably connected with a positioning block.

[0013] As a further embodiment of this utility model: the threaded rod is threadedly connected to the rotating plate through a connecting hole, and a sliding structure is formed between the threaded rod and the positioning block.

[0014] The beneficial effects of this utility model are as follows: the limiting rod fixed to the connecting rod at the bottom of the extended rod slides along the groove opened in the mounting slot. After adjusting the length of the threaded cutter as needed, the limiting rod is rotated clockwise to allow it to pass into the positioning groove for limiting. Since the threaded cutter cuts clockwise, it can drive the lower cutter bar and cutter body to cut after the extended rod is clamped at the power end, avoiding loosening or over-tightening. The threaded sleeve connects the cutter bar and the extended rod, thereby further improving the stability of the connection and preventing loosening.

[0015] After the length adjustment is completed, manually move the rotating plate that extends out of the groove. The rotating plate rotates under the support and limit of the limit frame, and connects with the threaded rod through the connecting hole. At the same time, the bottom end of the threaded rod passes through the positioning block and is fixed to the tool bar. The rectangular shape allows the threaded rod to slide along the connecting hole without rotating with it. This allows the abutment plate to press and fit the limit rod in the positioning groove, further improving the stability of the threaded tool after it is lengthened. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the extended rod structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the slide groove structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the threaded rod structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the positioning block structure of this utility model.

[0021] In the diagram: 1. Tool holder; 2. Tool body; 3. Extension mechanism; 301. Extension rod; 302. Mounting groove; 303. Connecting rod; 304. Limiting rod; 305. Slide groove; 306. Positioning groove; 307. Threaded sleeve; 4. Through groove; 5. Limiting mechanism; 501. Rotating plate; 502. Limiting frame; 503. Connecting hole; 504. Threaded rod; 505. Contact plate; 506. Positioning block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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. Example 1

[0023] like Figures 1 to 5 As shown, a threading tool with an extended structure includes a tool holder 1, a tool body 2 fixed below the tool holder 1, and an extension mechanism 3 inside the tool holder 1. The extension mechanism 3 includes an extension rod 301, which is located at the top of the tool holder 1. A mounting groove 302 is formed inside the tool holder 1. A connecting rod 303 is fixed at the bottom of the extension rod 301 corresponding to the mounting groove 302. Limiting rods 304 are fixed on both sides of the lower outer wall of the connecting rod 303. Sliding grooves 305 are formed on both sides inside the mounting groove 302 corresponding to the positions of the limiting rods 304. A positioning groove 306 is formed on one side of the sliding groove 305. A threaded sleeve 307 is slidably connected to the outside of the tool holder 1. The positioning groove 306 is perpendicular to the sliding groove 305. A sliding structure is formed between the limiting rod 304 and the threaded sleeve 307, which is threadedly connected to the tool holder 1 and the extension rod 301. The limiting rod 304, which is fixed to the connecting rod 303 at the bottom of the extension rod 301, slides along the sliding groove 305 opened in the mounting groove 302. After adjusting the length of the threaded tool as needed, the limiting rod 304 is rotated clockwise to enter the positioning groove 306 for limiting. Since the threaded tool cuts clockwise, the extension rod 301 can be clamped at the power end to drive the tool holder 1 and the tool body 2 below to cut, avoiding loosening or over-tightening. The threaded sleeve 307 is threadedly connected between the tool holder 1 and the extension rod 301, thereby further improving the stability of the connection and preventing loosening. Example 2

[0024] In addition to all the technical features in Embodiment 1, this embodiment also includes: a through-hole 4 is provided on the lower side of one side of the outer wall of the tool holder 1; a limiting mechanism 5 is provided inside the through-hole 4; the limiting mechanism 5 includes a rotating plate 501, which extends through the through-hole 4; a limiting bracket 502 is fixed inside the mounting groove 302 corresponding to the position of the rotating plate 501; a connecting hole 503 is provided inside the rotating plate 501; the limiting mechanism 5 also includes a threaded rod 504, which is slidably connected inside the connecting hole 503; a contact plate 505 is fixed to the top end of the threaded rod 504; and a positioning block 506 is slidably connected to the bottom end of the threaded rod 504. 504 is threadedly connected to the rotating plate 501 through the connecting hole 503, and the threaded rod 504 and the positioning block 506 form a sliding structure. After the length is adjusted, the rotating plate 501 that passes through the slot 4 is manually turned. The rotating plate 501 rotates under the support and limit of the limiting frame 502, and is threadedly connected to the connecting hole 503 and the threaded rod 504. At the same time, the bottom end of the threaded rod 504 passes through the positioning block 506 and is fixed to the tool bar 1. The rectangular shape allows the threaded rod 504 to slide along the connecting hole 503 without rotating. This allows the abutment plate 505 to press and fit the limiting rod 304 in the positioning slot 306, further improving the stability of the threaded tool after it is lengthened.

[0025] Working principle: The thread cutter is composed of the tool holder 1 and the tool body 2. The connecting rod 303, which is fixed at the bottom of the extension rod 301, passes through the mounting groove 302 and slides along the slide groove 305 via the limiting rod 304. After sliding to the required extension position, it rotates clockwise into the positioning groove 306. The threaded sleeve 307 rotates clockwise to cover the tool holder 1 and the extension rod 301, adjusting the length and improving positioning stability. When the thread cutter is cutting, it rotates clockwise. The clockwise limiting prevents reversal or loosening. The rotating plate 501, which protrudes from the inside of the groove 4, is manually turned and rotated under the limiting and support of the limiting frame 502. It then connects to the thread rod 504 through the connecting hole 503. The positioning block 506, which protrudes from the bottom of the thread rod 504, is fixed to the bottom of the tool holder 1. This allows the thread rod 504 to slide while preventing it from rotating. This causes the contact plate 505 to adhere to and press against the limiting rod 304, achieving a limiting effect and further improving stability, preventing loosening during the cutting process.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Threaded tool with lengthened structure comprising a tool shank (1), characterized in that: The lower part of the cutter bar (1) is fixed with a cutter body (2), and the inside of the cutter bar (1) is provided with an extension mechanism (3); The extension mechanism (3) comprises an extension rod (301), the extension rod (301) is arranged at the top end of the cutter bar (1), and the inside of the cutter bar (1) is provided with a mounting groove (302), the bottom end of the extension rod (301) is fixed with a connecting rod (303) corresponding to the position of the mounting groove (302), the outer wall of the connecting rod (303) is fixed with a limiting rod (304) on the lower side, the inside of the mounting groove (302) is provided with a sliding groove (305) corresponding to the position of the limiting rod (304) on both sides, and one side of the sliding groove (305) is provided with a positioning groove (306), and the outside of the cutter bar (1) is slidably connected with a threaded sleeve (307).

2. A thread tool with an elongated structure according to claim 1, characterized in that: The positioning groove (306) and the sliding groove (305) are perpendicular to each other, and the sliding groove (305) and the limiting rod (304) form a sliding structure.

3. A thread tool with an elongated structure according to claim 1, characterized in that: The threaded sleeve (307) is threadedly connected with the cutter bar (1), and the threaded sleeve (307) is threadedly connected with the extension rod (301).

4. A thread tool having an elongated structure according to claim 1, characterized in that: The outer wall of the cutter bar (1) is provided with a through groove (4) on one side and below, and the inside of the through groove (4) is provided with a limiting mechanism (5).

5. A thread tool having an elongated structure according to claim 4, characterized in that: The limiting mechanism (5) comprises a rotating plate (501), the rotating plate (501) passes through the inside of the through groove (4), the inside of the mounting groove (302) is fixed with a limiting frame (502) corresponding to the position of the rotating plate (501), and the inside of the rotating plate (501) is provided with a connecting hole (503).

6. A thread tool having an elongated structure according to claim 5, characterized in that: The limiting mechanism (5) further comprises a threaded rod (504), the threaded rod (504) is slidably connected in the inside of the connecting hole (503), and the top end of the threaded rod (504) is fixed with a resisting plate (505), and the bottom end of the threaded rod (504) is slidably connected with a positioning block (506).

7. A thread tool having an elongated structure according to claim 6, characterized in that: The threaded rod (504) is threadedly connected with the rotating plate (501) through the connecting hole (503), and the threaded rod (504) and the positioning block (506) form a sliding structure.

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