A screw tap with resistance to torsional breakage

Abstract

The utility model discloses a kind of anti-torsional fracture's screw sleeve tap, including support seat, limiting cylinder, output rod, transmission mechanism and tap body, limiting cylinder is fixed on support seat, output rod is rotatably connected on support seat.The beneficial effects of the utility model are as follows: in the utility model, the friction between linkage ball and first transmission disc, second transmission disc, and then make output rod can be synchronously rotatably connected with input rod, and when the torque generated when tap body is milled is greater than friction, relative sliding occurs between second transmission disc and linkage ball, and then cut off output power, make torque constant, avoid the situation that tap body is broken due to excessive torque, and the angle of linkage ball and transmission disc is adjusted by adjusting unit, the angle of contact surface can be changed in real time, so as to accurately control transmission speed, the scheme replaces traditional rigid transmission by mechanical torque transmission, fundamentally solves the fracture problem caused by torsional overload.

Description

Technical Field

[0001] This utility model relates to a threaded tap, specifically a threaded tap resistant to torsional fracture, and belongs to the field of threaded tap technology. Background Technology

[0002] A threaded insert tap is a special tool used for machining and installing the internal threads of a wire thread insert. It is suitable for machine or hand operation. The tap structure types include straight flute, spiral flute, and extrusion. Straight flute taps are more versatile, spiral flute taps are suitable for blind hole chip removal, and extrusion taps are suitable for machining plastic materials through metal plastic deformation.

[0003] However, most existing threaded insert taps have various problems. For example, in a threaded insert extrusion tap disclosed in publication number CN221087511U, although the combination of the sealing cap, sealing layer, convex ring, liquid reservoir, liquid injection groove, liquid outlet hole and heat dissipation groove can enhance the heat dissipation effect of the tap body and improve the tapping efficiency when tapping the threaded insert, during the machining process of the threaded insert tap, when machining hard materials such as stainless steel, the chips are easy to clog the groove, increase the torque load, and if the bottom hole size is too small or the drill bit is worn, the tapping torque will increase sharply, especially in the blind hole machining, which is more significant, leading to the tap teeth breaking or breaking, which poses a great safety hazard. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing a threaded tap that is resistant to torsional fracture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A threaded tap resistant to torsional fracture includes a support base, a limiting cylinder, an output rod, a transmission mechanism, and a tap body. The limiting cylinder is fixed on the support base, the output rod is rotatably connected to the support base and located at the axis of one end of the limiting cylinder, the transmission mechanism is disposed inside the limiting cylinder, and the tap body is connected to one end of the output rod. The transmission mechanism includes an input rod, a first transmission disc, a second transmission disc, a linkage ball, and an adjustment unit. The input rod is slidably connected to the axis at the other end of the limiting cylinder. The first transmission disc is coaxially fixed to the input rod, and the second transmission disc is coaxially fixed to the output rod. The linkage ball is rolled and engaged between the first transmission disc and the second transmission disc.

[0006] As a further embodiment of this utility model: the transmission mechanism further includes a support seat and a spring. The support seat is fixed at one end of the axis of the limiting cylinder. The input rod is slidably connected to the support seat. The spring is sleeved on the outside of the input rod, and one end of the spring abuts against the support seat, while the other end slidably abuts against the first transmission disc.

[0007] As a further embodiment of this utility model: the adjustment unit includes an adjustment rod, a worm gear, a sliding groove, and a positioning groove. The adjustment rod passes through the center of the linkage ball and is rotatably connected to the linkage ball. The worm gear is rotatably connected to the end of the limiting cylinder away from the input rod. The sliding groove passes through the worm gear and is inclined. The positioning groove passes radially through the end of the limiting cylinder away from the worm gear. One end of the adjustment rod is slidably engaged in the sliding groove, and the other end is slidably engaged in the positioning groove.

[0008] As a further embodiment of this utility model: the adjustment unit further includes a fixed frame and a worm gear, the fixed frame is fixed to the top of the limiting cylinder, and the worm gear is rotatably connected to the fixed frame and meshes with the worm wheel.

[0009] As a further embodiment of this utility model: the first transmission disk and the second transmission disk are arranged coaxially opposite each other, and a slope structure is provided at the edge of the two ends that are close to each other.

[0010] As a further embodiment of this utility model: one end of the output rod is provided with a round hole, the tap body is inserted into the round hole, and a locking screw is provided on the output rod, and the locking screw abuts and locks against the tap body.

[0011] The beneficial effects of this utility model are: In this invention, the friction between the linkage ball and the first and second transmission discs enables the output rod to rotate synchronously with the input rod. When the torque generated during tap milling exceeds the friction force, relative sliding occurs between the second transmission disc and the linkage ball, thereby cutting off the output power and keeping the torque constant. This prevents the tap body from breaking due to excessive torque. Furthermore, by adjusting the angle between the linkage ball and the transmission disc through the adjustment unit, the angle of the contact surface can be changed in real time, thus precisely controlling the transmission speed. This solution replaces traditional rigid transmission with mechanical torque transmission, fundamentally solving the problem of breakage caused by torque overload. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the tap body and its overall connection structure of the present invention; Figure 2 This is a schematic diagram of the limiting cylinder connection structure of this utility model; Figure 3 This is a schematic diagram of the transmission mechanism structure of this utility model; Figure 4 This is a schematic diagram of the transmission disc and its overall connection structure of the present invention.

[0013] In the diagram: 1. Support base, 2. Limiting cylinder, 3. Output rod, 4. Transmission mechanism, 41. Input rod, 42. First transmission disc, 43. Second transmission disc, 44. Linkage ball, 45. Support base, 46. Spring, 47. Adjusting rod, 48. Worm gear, 49. Slide groove, 410. Positioning groove, 411. Fixing frame, 412. Worm, 5. Tap body. Detailed Implementation

[0014] 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. Example 1

[0015] like Figures 1 to 4 As shown, a threaded tap resistant to torsional fracture includes a support base 1, a limiting cylinder 2, an output rod 3, a transmission mechanism 4, and a tap body 5. The limiting cylinder 2 is fixed on the support base 1, the output rod 3 is rotatably connected to the support base 1 and located at the axis of one end of the limiting cylinder 2, the transmission mechanism 4 is set inside the limiting cylinder 2, and the tap body 5 is connected to one end of the output rod 3. The transmission mechanism 4 includes an input rod 41, a first transmission disc 42, a second transmission disc 43, a linkage ball 44, and an adjustment unit. The input rod 41 is slidably connected to the shaft at the other end of the limiting cylinder 2. The first transmission disc 42 is coaxially fixed to the input rod 41, and the second transmission disc 43 is coaxially fixed to the output rod 3. The linkage ball 44 is rolled and engaged between the first transmission disc 42 and the second transmission disc 43. The transmission mechanism 4 also includes a support 45 and a spring 46. The support 45 is fixed at one end of the shaft of the limiting cylinder 2. The input rod 41 is slidably connected to the support 45. The spring 46 is sleeved on the outside of the input rod 41, and one end of the spring 46 abuts against the support 45, while the other end slidably abuts against the first transmission disc 42. The adjustment unit includes an adjustment rod 47, a worm gear 48, a slide groove 49, and a positioning groove 410. The adjustment rod 47 passes through the center of the linkage ball 44 and is rotatably connected to the linkage ball 44. The worm gear 48 is rotatably connected to the end of the limiting cylinder 2 away from the input rod 41. The slide groove 49 is provided through the worm gear 48 and is inclined. The positioning groove 410 is provided radially through the end of the limiting cylinder 2 away from the worm gear 48. One end of the adjustment rod 47 is slidably engaged in the slide groove 49, and the other end is slidably engaged in the positioning groove 410. The adjustment unit also includes a fixed frame 411 and a worm gear 412. The fixed frame 411 is fixed to the top of the limiting cylinder 2, and the worm gear 412 is rotatably connected to the fixed frame 411 and meshes with the worm wheel 48.

[0016] In this invention, the friction between the linkage ball 44 and the first transmission disc 42 and the second transmission disc 43 enables the output rod 3 to rotate synchronously with the input rod 41. When the torque generated during milling of the tap body 5 exceeds the friction force, relative sliding occurs between the second transmission disc 43 and the linkage ball 44, thereby cutting off the output power and keeping the torque constant. This prevents the tap body 5 from breaking due to excessive torque. Furthermore, by adjusting the angle between the linkage ball 44 and the transmission disc through the adjustment unit, the angle of the contact surface can be changed in real time, thereby precisely controlling the transmission speed. This solution replaces the traditional rigid transmission with mechanical torque transmission, fundamentally solving the problem of breakage caused by torque overload. Example 2

[0017] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes: The first transmission disc 42 and the second transmission disc 43 are arranged coaxially opposite each other, and an inclined structure is provided at the edge of the two ends that are close to each other. By setting the inclined structure, the linkage ball 44 can contact different positions on the inclined surface when adjusting the angle, thereby realizing the adjustment of the transmission speed of the transmission disc.

[0018] One end of the output rod 3 is provided with a round hole, the tap body 5 is inserted into the round hole, and a locking screw is provided on the output rod 3, and the locking screw abuts and locks against the tap body 5. The setting of the locking screw allows the tap body 5 to be quickly disassembled and assembled.

[0019] Working principle: When using this threaded tap, the input rod 41 first drives the first transmission disc 42 to rotate, and the linkage ball 44 drives the second transmission disc 43 and the output rod 3 to rotate. Then, the tap body 5 performs milling operations on the workpiece. When it is necessary to adjust the transmission speed of the tap body 5, the worm 412 is rotated to make the worm wheel 48 mesh and link, so that the adjusting rod 47 can drive the linkage ball 44 to deflect under the limiting action of the slide groove 49, thereby adjusting the distance between the first transmission disc 42 and the second transmission disc 43, so that the linkage ball 44 contacts different inclined surfaces, thereby realizing the rapid adjustment of the transmission speed of the tap body 5.

[0020] 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.

[0021] 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. A threaded tap resistant to torsional fracture, comprising a support base (1), a limiting sleeve (2), an output rod (3), a transmission mechanism (4), and a tap body (5), characterized in that, The limiting cylinder (2) is fixed on the support base (1), the output rod (3) is rotatably connected to the support base (1) and located at the center of one end of the limiting cylinder (2), the transmission mechanism (4) is set inside the limiting cylinder (2), and the tap body (5) is connected to one end of the output rod (3). The transmission mechanism (4) includes an input rod (41), a first transmission disc (42), a second transmission disc (43), a linkage ball (44), and an adjustment unit. The input rod (41) is slidably connected to the axis at the other end of the limiting cylinder (2). The first transmission disc (42) is coaxially fixed to the input rod (41), and the second transmission disc (43) is coaxially fixed to the output rod (3). The linkage ball (44) is rolled and engaged between the first transmission disc (42) and the second transmission disc (43).

2. The threaded tap with anti-torsional fracture according to claim 1, characterized in that: The transmission mechanism (4) also includes a support (45) and a spring (46). The support (45) is fixed at one end of the axis of the limiting cylinder (2). The input rod (41) is slidably connected to the support (45). The spring (46) is sleeved on the outside of the input rod (41). One end of the spring (46) abuts against the support (45), and the other end slides against the first transmission disc (42).

3. The threaded tap for resisting torsional fracture according to claim 1, characterized in that: The adjustment unit includes an adjustment rod (47), a worm gear (48), a slide groove (49), and a positioning groove (410). The adjustment rod (47) passes through the center of the linkage ball (44) and is rotatably connected to the linkage ball (44). The worm gear (48) is coaxially rotatably connected to the end of the limiting cylinder (2) away from the input rod (41). The slide groove (49) is disposed through the worm gear (48) and is inclined. The positioning groove (410) is disposed radially through the end of the limiting cylinder (2) away from the worm gear (48). One end of the adjustment rod (47) is slidably engaged in the slide groove (49), and the other end is slidably engaged in the positioning groove (410).

4. The threaded tap for resisting torsional fracture according to claim 3, characterized in that: The adjustment unit also includes a fixed frame (411) and a worm gear (412). The fixed frame (411) is fixed to the top of the limiting cylinder (2), and the worm gear (412) is rotatably connected to the fixed frame (411) and meshes with the worm wheel (48).

5. The threaded tap for resisting torsional fracture according to claim 1, characterized in that: The first transmission disk (42) and the second transmission disk (43) are coaxially arranged opposite each other, and a slope structure is provided at the edge of the two ends that are close to each other.

6. The threaded tap for resisting torsional fracture according to claim 1, characterized in that: One end of the output rod (3) is provided with a round hole, the tap body (5) is inserted into the round hole, and a locking screw is provided on the output rod (3), and the locking screw abuts and locks against the tap body (5).

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