Telescopic double-end screw tap

Abstract

The utility model provides a telescopic double-end screw tap, and belongs to the technical field of screw taps. The telescopic double-end screw tap comprises a first cone, a second cone, a connecting ring and a locking ring. A sleeve handle part is formed at one end of the first cone body, a rod-shaped handle part is arranged at one end of the second cone body, and the rod-shaped handle part is inserted into the sleeve handle part for sliding adjustment; the connecting ring sleeves the tail end of the handle part of the first centrum cannula, a connecting external thread is formed on the outer side wall of the connecting ring, and a plurality of fixing claws are circumferentially formed at one end of the connecting ring; the locking ring is arranged on the rod-shaped handle portion of the second cone in a sleeving mode and connected with the connecting ring in a matched mode, locking inner threads matched with the connecting outer threads are formed on the inner side wall of the locking ring, and the inner side wall of the locking ring extrudes the connecting ring fixing claws through rotating installation so that the sleeve handle portion and the rod-shaped handle portion can be relatively and fixedly connected. The utility model has the advantages of telescopic adjustment and fixation, flexibility in use, convenience in replacement and resource cost saving.

Description

Technical Field

[0001] The utility model belongs to the technical field of taps, and particularly relates to a telescopic double-ended tap. Background Art

[0002] A tap is a tool used to create internal threads. It features a groove along the axial direction and is categorized by shape: straight-flute taps, spiral-flute taps, and spiral-point taps. Most taps currently on the market have a threaded end and a shank with a square head at the other end. This means a single tap can only tap a single hole, resulting in low efficiency.

[0003] According to patent number CN202120724530.6, a double-ended tap is provided. The worm of the double-ended tap extends from the transverse groove, allowing the worm to further engage with the meshing hole, achieving the purpose of re-fixing cone one and cone two, so that cone one and cone two can be fully connected to form a bidirectional tap, thereby improving processing efficiency and saving resource costs. However, in actual use, there are many different processing distances between the processing holes, and the fixed-length double-ended tap has limitations. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems existing in the prior art and to provide a double-ended tap with a telescopic adjustment of the tap length.

[0005] The purpose of the utility model can be achieved by the following technical solutions: a telescopic double-ended tap, comprising a first vertebral body, a second vertebral body, a connecting ring and a locking ring; one end of the first vertebral body is threaded, and the other end is connected to a sleeve shank through a transition portion; one end of the second vertebral body is threaded, and the other end is a rod-shaped shank, the outer diameter of the rod-shaped shank is equal to the inner diameter of the sleeve shank, and the rod-shaped shank is inserted into the sleeve shank during installation;

[0006] The connecting ring is sleeved on the tail end of the first vertebral body sleeve handle, and the connecting ring is formed with a bottom support on the side facing the first vertebral body thread, and a plurality of fixing claws are formed circumferentially on the other end. A connecting external thread is formed circumferentially on the outer side wall between the bottom support and the fixing claws, and a gap groove is opened between the fixing claws;

[0007] The locking ring is sleeved on the rod-shaped handle of the second vertebral body and is connected with the connecting ring during installation. A locking internal thread is formed on the inner wall of the locking ring facing the connecting ring. The locking internal thread cooperates with the connecting external thread. A plurality of clamping grooves are opened circumferentially on the outer wall of the locking ring.

[0008] In the above-mentioned telescopic double-ended tap, a tapered guide head is formed at the tail of the rod-shaped shank.

[0009] In the above-mentioned telescopic double-ended tap, a connecting step is formed on the inner side wall of the fixed claw, the connecting step abuts against the tail end face of the sleeve shank, and a pressure inclined surface is formed on the tail of the outer side wall of the fixed claw.

[0010] In the above-mentioned telescopic double-ended tap, an extrusion slope continuous with the locking internal thread is formed on the inner side wall of the middle section of the locking ring, so that the inner diameter of the locking ring gradually decreases.

[0011] In the above-mentioned telescopic double-ended tap, a positioning ring is formed on the inner side of the locking ring at the end facing the second vertebral thread, and the inner diameter of the positioning ring is equal to the outer diameter of the rod-shaped shank.

[0012] Compared with the existing technology, the telescopic double-ended tap provided by the utility model can relatively adjust and fix the first vertebra and the second vertebra through the mutual cooperation of the connecting ring and the locking ring, thereby realizing the telescopic adjustment of the double-ended tap, making it flexibly applicable to internal thread processing, highly practical, and effectively improving processing efficiency; when one end of the vertebra is damaged, the utility model is convenient for replacement without the need to scrap the entire body, effectively saving resources and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the telescopic double-ended tap;

[0014] Figure 2 This is an exploded view of the structure of the telescopic double-ended tap;

[0015] Figure 3 This is a cross-sectional view of the structure of the connecting ring and the locking ring in the telescopic double-ended tap;

[0016] In the above figure, 100, the first vertebra; 110, the sleeve handle; 120, the transition portion; 200, the second vertebra; 210, the rod-shaped handle; 211, the guide head; 300, the connecting ring; 310, the base; 320, the connecting external thread; 330, the fixing claw; 331, the clearance groove; 332, the pressure inclined surface; 333, the connecting step; 400, the locking ring; 410, the clamping groove; 420, the locking internal thread; 430, the extrusion inclined surface; 440, the positioning ring. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figures 1 to 3As shown, the telescopic double-ended tap includes a first vertebral body 100, a second vertebral body 200, a connecting ring 300 and a locking ring 400. The first vertebral body 100 and the second vertebral body 200 are coaxially arranged relative to each other, the connecting ring 300 is sleeved on the tail end of the first vertebral body 100, and the locking ring 400 is sleeved on the second vertebral body 200. When installed, they cooperate with the connecting ring 300 to connect.

[0019] like Figure 2 As shown, one end of the first vertebra 100 is threaded, and the other end is formed with a sleeve handle 110. One end of the second vertebra 200 is threaded, and the other end is a rod-shaped handle 210. The outer diameter of the rod-shaped handle 210 is equal to the inner diameter of the sleeve handle 110. During installation, the rod-shaped handle 210 is inserted into the sleeve handle 110 so that the rod-shaped handle 210 can slide inside the sleeve handle 110, thereby realizing the telescopic adjustment of the double-headed tap.

[0020] Because the outer diameter of the cannula handle 110 is larger than that of the rod-shaped handle 210, a transition portion 120 is required to connect the threaded end of the first vertebral body 100 to the cannula handle 110. The transition portion 120 is a flat-topped cone. To facilitate insertion of the rod-shaped handle 210 into the cannula handle 110, a tapered guide head 211 is formed at the rear end of the rod-shaped handle 210.

[0021] like Figures 2 to 3 As shown, the connecting ring 300 is sleeved on the tail end of the sleeve handle 110 of the first vertebral body 100, and the connecting ring 300 is formed with a base 310 on the threaded side facing the first vertebral body 100, and the base 310 is used to limit the locking ring 400; a plurality of fixing claws 330 are formed circumferentially at the other end, and a connecting external thread 320 is formed circumferentially on the outer wall between the base 310 and the fixing claws 330.

[0022] An engagement step 333 is formed on the inner sidewall of the fixing claw 330. The engagement step 333 abuts against the rear end surface of the sleeve handle 110 to limit the position of the engagement ring 300. A pressure-bearing inclined surface 332 is formed on the rear end of the outer sidewall of the fixing claw 330. A clearance groove 331 is defined between adjacent fixing claws 330. When the pressure-bearing inclined surface 332 on the fixing claw 330 is subjected to an inward squeezing force, the width of the clearance groove 331 decreases, and the inner sidewall of the fixing claw 330 behind the engagement step 333 comes into contact with the outer surface of the rod-shaped handle 210 of the second vertebral body 200, thereby fixing and limiting the rod-shaped handle 210.

[0023] The locking ring 400 is sleeved onto the rod-shaped handle 210 of the second vertebral body 200. A locking internal thread 420 is formed on the inner sidewall of the locking ring 400 facing the connecting ring 300. The locking internal thread 420 cooperates with the connecting external thread 320 to secure the locking ring 400. A compression slope 430 is formed on the inner sidewall of the middle section of the locking ring 400, which is continuous with the locking internal thread 420. This gradually reduces the inner diameter of the locking ring 400. When the locking ring 400 and the connecting ring 300 are rotated and connected, the compression slope 430 gradually mates with the compression slope 332 of the fixing claw 330 as the locking ring 400 advances, exerting an inward compression force on the fixing claw 330, thereby causing the fixing claw 330 to relatively secure the first vertebral body 100 and the second vertebral body 200.

[0024] The outer wall of the locking ring 400 is provided with a plurality of clamping grooves 410 in a circumferential direction. The clamping grooves 410 are planar structures, which facilitate the clamping of the clamp chuck, thereby driving the first vertebra 100 and the second vertebra 200 to perform tapping operations together. The locking ring 400 has a positioning ring 440 formed on the inner side of the port facing the threaded side of the second vertebra 200. The inner diameter of the positioning ring 440 is equal to the outer diameter of the rod-shaped shank 210. Since the fixing claw 330 has a certain thickness, there may be a certain gap between the inner side wall of the end with the smaller inner diameter of the rear end of the extrusion bevel 430 and the outer side wall of the rod-shaped shank 210. The positioning ring 440 can play a role in positioning and compensating for the gap, preventing the rod-shaped shank 210 from being eccentric during tapping.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0026] Although various terms are used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A telescopic double-ended tap, characterized in that: The invention comprises a first vertebra (100), a second vertebra (200), a connecting ring (300) and a locking ring (400); one end of the first vertebra (100) is threaded, and the other end is connected to a sleeve handle (110) through a transition portion (120); one end of the second vertebra (200) is threaded, and the other end is a rod-shaped handle (210); the outer diameter of the rod-shaped handle (210) is equal to the inner diameter of the sleeve handle (110); when installing, the rod-shaped handle (210) is inserted into the sleeve handle (110); The connecting ring (300) is sleeved on the tail end of the sleeve handle (110) of the first vertebra (100), and the connecting ring (300) is formed with a bottom support (310) on the thread side facing the first vertebra (100), and a plurality of fixing claws (330) are formed circumferentially on the other end. A connecting external thread (320) is formed circumferentially on the outer wall between the bottom support (310) and the fixing claws (330), and a gap groove (331) is opened between the fixing claws (330). ); the locking ring (400) is sleeved on the rod-shaped handle (210) of the second vertebra (200), and is connected to the connecting ring (300) in cooperation with each other during installation. The locking ring (400) is provided with a locking internal thread (420) on the inner side wall facing the connecting ring (300), and the locking internal thread (420) cooperates with the connecting external thread (320). A plurality of clamping grooves (410) are provided on the outer side wall of the locking ring (400) in a circumferential direction.

2. A telescopic double-ended tap according to claim 1, characterized in that: A conical guide head (211) is formed at the tail of the rod-shaped handle (210).

3. The telescopic double-ended tap according to claim 1, characterized in that: A connecting step (333) is formed on the inner side wall of the fixing claw (330), and the connecting step (333) abuts against the tail end face of the sleeve handle (110). A pressure inclined surface (332) is formed on the tail of the outer side wall of the fixing claw (330).

4. The telescopic double-ended tap according to claim 1, characterized in that: An extrusion slope (430) continuous with the locking internal thread (420) is formed on the inner side wall of the middle section of the locking ring (400), so that the inner diameter of the locking ring (400) gradually decreases.

5. The telescopic double-ended tap according to claim 1, characterized in that: The locking ring (400) is formed with a positioning ring (440) on the inner side of the port facing the threaded side of the second vertebral body (200), and the inner diameter of the positioning ring (440) is equal to the outer diameter of the rod-shaped handle (210).

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