Anti-breaking extrusion tap with torsion protection ring

Abstract

The utility model discloses a kind of anti-fracture extrusion taps with torsion protection ring, including fixed base, butt joint disc, tap body, supporting cylinder and driving mechanism, fixed base is fixed on external machine tool, butt joint disc is rotatably connected on fixed base, tap body is coaxially locked in butt joint disc.The beneficial effects of the utility model are:in the utility model, by setting driving mechanism, then by first gasket, second gasket in driving mechanism, drive sprocket both sides are clamped, and by the friction provided by gasket, drive sprocket, tap body and butt joint disc are synchronously rotated, and when tap body is milled, if torsion is greater than friction, then drive sprocket and butt joint disc relatively rotate, reach torsion overload protection effect, effectively avoid the risk that tap body is fractured due to torsion overload, and provide reverse thrust for clamping nut by the setting of anti-loosening unit, avoid the change of friction caused by clamping nut loosening in the process of processing.

Description

Technical Field

[0001] This utility model relates to a tap, specifically a fracture-resistant extrusion tap with a torque protection ring, belonging to the field of tap technology. Background Technology

[0002] A tap is a cutting tool specifically designed for machining internal threads. It cuts or calibrates internal threads inside a pre-drilled workpiece to create internal thread structures for parts such as nuts and threaded holes. It is widely used in the machinery manufacturing industry. As a core tool for machining internal threads in the manufacturing industry, taps are indispensable in the automotive, aerospace, and electronics fields due to their high efficiency and precision.

[0003] However, most existing taps have various problems. For example, in the splitting and extrusion tap disclosed in publication number CN104668672B, although it reduces the extrusion pressure during the extrusion process, improves the contact conditions in the deformation zone, and reduces the generation of frictional heat, and reduces the deformation resistance of the extruded workpiece, making it suitable for machining threads in materials with poor strength and rigidity, in this technical solution and most current taps, when traditional taps tap hard materials with high hardness, such as aerospace alloys and quenched steel, the material elongation decreases, causing the cutting resistance of the tap to increase sharply, which in turn causes the peak torque to exceed the tap's bearing limit. Currently, most taps and drive structures use rigid connections, which cannot form overload protection when the torque is overloaded, easily leading to tap breakage and damage, posing 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 fracture-resistant extrusion tap with a torque protection ring.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fracture-resistant extrusion tap with a torque protection ring includes a fixed base, a mating plate, a tap body, a support cylinder, and a drive mechanism. The fixed base is fixed on an external machine tool, the mating plate is rotatably connected to the fixed base, the tap body is coaxially locked inside the mating plate, the support cylinder is coaxially fixed on the mating plate at one end away from the tap body, and the tap body passes through the support cylinder. The drive mechanism is sleeved on the outside of the support cylinder.

[0007] The driving mechanism includes a first washer, a drive sprocket, a second washer, a clamping nut, and an anti-loosening unit. The first washer, the drive sprocket, and the second washer are all coaxially rotatably sleeved on the outside of the support cylinder. The first washer is located between the mating disc and the drive sprocket, and the second washer is located between the drive sprocket and the clamping nut. The outside of the support cylinder is provided with threads. The clamping nut is sleeved on the outside of the support cylinder and is threadedly engaged with the support cylinder through the threads. The clamping nut is located on one side of the second washer, and the anti-loosening unit is located between the second washer and the clamping nut.

[0008] As a further embodiment of this utility model: the anti-loosening unit includes an abutment plate and an elastic gasket, both of which are sleeved on the support cylinder. One side of the abutment plate abuts against the second gasket, and the other side abuts against the elastic gasket.

[0009] As a further embodiment of this utility model: the anti-loosening unit further includes a pressure ring and a first locking screw. The pressure ring is sleeved on the support cylinder and abuts against the elastic washer. A screw hole is provided through the clamping nut. The first locking screw is screwed into the screw hole and one end abuts against the pressure ring.

[0010] As a further improvement of this utility model: a threaded hole is provided axially through the peripheral wall of the clamping nut, and a second locking screw is threaded in the threaded hole, with one end of the second locking screw abutting against the support cylinder.

[0011] As a further embodiment of this utility model: multiple threaded holes are provided axially through the side wall of the docking plate, and a third locking screw is screwed into the threaded holes. One end of the third locking screw abuts against the tap body, and the tap body and the docking plate are detachably connected.

[0012] As a further improvement of this utility model: the tail end of the tap body is coaxially rotatably connected to a guide tube via a sealed bearing, and an internal cooling channel is provided inside the tap body.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, a drive mechanism is provided, in which the first and second washers clamp the two sides of the drive sprocket. The friction provided by the washers drives the mating disc, tap body, and drive sprocket to rotate synchronously. When the tap body is milling, if the torque is greater than the friction, the drive sprocket and mating disc rotate relative to each other, achieving a torque overload protection effect. This effectively avoids the risk of the tap body breaking due to torque overload, eliminating safety hazards. Furthermore, the anti-loosening unit provides a reverse thrust to the clamping nut, preventing the clamping nut from loosening during processing and causing changes in friction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the tap body structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the drive mechanism structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the clamping nut structure of this utility model.

[0019] In the diagram: 1. Fixed base, 2. Connecting plate, 3. Tap body, 4. Support cylinder, 5. Drive mechanism, 51. First washer, 52. Drive sprocket, 53. Second washer, 54. Clamping nut, 55. Abutment plate, 56. Elastic washer, 57. Pressure ring, 58. First locking screw, 59. Second locking screw, 6. Third locking screw, 7. Guide cylinder. 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. Example 1

[0021] like Figures 1 to 4 As shown, a fracture-resistant extrusion tap with a torque protection ring includes a fixed base 1, a mating plate 2, a tap body 3, a support cylinder 4, and a drive mechanism 5. The fixed base 1 is fixed on an external machine tool, the mating plate 2 is rotatably connected to the fixed base 1, the tap body 3 is coaxially locked inside the mating plate 2, the support cylinder 4 is coaxially fixed on the mating plate 2 at one end away from the tap body 3, and the tap body 3 passes through the support cylinder 4. The drive mechanism 5 is sleeved on the outside of the support cylinder 4.

[0022] The drive mechanism 5 includes a first washer 51, a drive sprocket 52, a second washer 53, a clamping nut 54, and an anti-loosening unit. The first washer 51, the drive sprocket 52, and the second washer 53 are all coaxially rotatably sleeved on the outside of the support cylinder 4. The first washer 51 is located between the mating disc 2 and the drive sprocket 52. The second washer 53 is located between the drive sprocket 52 and the clamping nut 54. The outside of the support cylinder 4 is provided with threads. The clamping nut 54 is sleeved on the outside of the support cylinder 4 and is threadedly engaged with the support cylinder 4 through the threads. The clamping nut 54 is located on one side of the second washer 53. The anti-loosening unit is located between the second washer 53 and the clamping nut 54.

[0023] The anti-loosening unit includes an abutment plate 55 and an elastic gasket 56. Both the abutment plate 55 and the elastic gasket 56 are sleeved on the support cylinder 4. One side of the abutment plate 55 abuts against the second gasket 53, and the other side abuts against the elastic gasket 56.

[0024] The anti-loosening unit also includes a pressure ring 57 and a first locking screw 58. The pressure ring 57 is sleeved on the support cylinder 4 and abuts against the elastic washer 56. A screw hole is provided through the clamping nut 54. The first locking screw 58 is screwed into the screw hole and one end abuts against the pressure ring 57.

[0025] In this utility model, a drive mechanism 5 is provided, and the first washer 51 and the second washer 53 in the drive mechanism 5 clamp the two sides of the drive sprocket 52. The friction provided by the washer drives the mating plate 2, the tap body 3 and the drive sprocket 52 to rotate synchronously. When the tap body 3 is milling, if the torque is greater than the friction, the drive sprocket 52 and the mating plate 2 will rotate relative to each other, achieving the torque overload protection effect. This effectively avoids the risk of the tap body 3 breaking due to torque overload and eliminates safety hazards. The anti-loosening unit is provided by the clamping nut 54 to provide reverse thrust, preventing the clamping nut 54 from loosening during the processing and causing changes in friction. Example 2

[0026] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0027] A threaded hole is provided axially through the peripheral wall of the clamping nut 54, and a second locking screw 59 is threaded in the threaded hole. One end of the second locking screw 59 abuts against the support cylinder 4. The clamping nut 54 and the support cylinder 4 are axially locked by the second locking screw 59, which further prevents the clamping nut 54 from loosening.

[0028] Multiple threaded holes are provided axially through the side wall of the mating plate 2, and a third locking screw 6 is screwed into the threaded holes. One end of the third locking screw 6 abuts against the tap body 3, and the tap body 3 and the mating plate 2 are detachably connected. The setting of the third locking screw 6 allows the tap body 3 to be quickly disassembled and assembled.

[0029] The tail end of the tap body 3 is coaxially connected to the guide cylinder 7 via a sealed bearing, and an internal cooling channel is provided inside the tap body 3. The guide cylinder 7 is connected to an external guide pipe, so that the coolant can flow in the internal cooling channel to achieve the cooling effect on the tap body 3.

[0030] Working principle: When using this tap, first connect the tap body 3 to the mating plate 2 and lock it with the third locking screw 6. Then, put the drive mechanism 5 on the support cylinder 4. Then, tighten the clamping nut 54 to fasten the first washer 51 and the second washer 53 to both sides of the drive sprocket 52. Then, tighten the first locking screw 58 to compress the elastic washer 56. During processing, the drive sprocket 52 is connected to the external drive equipment and provides driving force to drive the tap body 3 to rotate at high speed to mill the workpiece. When the torque of the tap body 3 is overloaded, relative sliding occurs between the drive sprocket 52 and the mating plate 2.

[0031] 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.

[0032] 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 fracture-resistant extrusion tap with a torque protection ring, comprising a fixed base (1), a mating plate (2), a tap body (3), a support cylinder (4), and a drive mechanism (5), characterized in that, The fixed seat (1) is fixed on the external machine tool, the docking plate (2) is rotatably connected to the fixed seat (1), the tap body (3) is coaxially locked inside the docking plate (2), the support cylinder (4) is coaxially fixed on the docking plate (2) at one end away from the tap body (3), and the tap body (3) passes through the support cylinder (4), and the drive mechanism (5) is sleeved on the outside of the support cylinder (4); The drive mechanism (5) includes a first washer (51), a drive sprocket (52), a second washer (53), a clamping nut (54), and an anti-loosening unit. The first washer (51), the drive sprocket (52), and the second washer (53) are coaxially rotatably sleeved on the outside of the support cylinder (4). The first washer (51) is located between the docking plate (2) and the drive sprocket (52). The second washer (53) is located between the drive sprocket (52) and the clamping nut (54). The outside of the support cylinder (4) is provided with threads. The clamping nut (54) is sleeved on the outside of the support cylinder (4) and is threaded with the support cylinder (4) through the threads. The clamping nut (54) is located on one side of the second washer (53). The anti-loosening unit is located between the second washer (53) and the clamping nut (54).

2. The anti-fracture extrusion tap with a torque protection ring according to claim 1, characterized in that: The anti-loosening unit includes an abutment plate (55) and an elastic gasket (56). The abutment plate (55) and the elastic gasket (56) are both sleeved on the support cylinder (4). One side of the abutment plate (55) abuts against the second gasket (53), and the other side abuts against the elastic gasket (56).

3. The anti-fracture extrusion tap with a torque protection ring according to claim 2, characterized in that: The anti-loosening unit also includes a pressure ring (57) and a first locking screw (58). The pressure ring (57) is sleeved on the support cylinder (4) and abuts against the elastic washer (56). The clamping nut (54) has a threaded hole through it. The first locking screw (58) is screwed into the threaded hole and one end abuts against the pressure ring (57).

4. The anti-fracture extrusion tap with a torque protection ring according to claim 1, characterized in that: The clamping nut (54) has a threaded hole extending through its circumferential wall along the axis, and a second locking screw (59) is threaded into the threaded hole, with one end of the second locking screw (59) abutting against the support cylinder (4).

5. The anti-fracture extrusion tap with a torque protection ring according to claim 1, characterized in that: Multiple threaded holes are provided axially through the side wall of the docking plate (2), and a third locking screw (6) is screwed into the threaded hole. One end of the third locking screw (6) abuts against the tap body (3), and the tap body (3) and the docking plate (2) are detachably connected.

6. The anti-fracture extrusion tap with a torque protection ring according to claim 1, characterized in that: The tail end of the tap body (3) is coaxially connected to the guide tube (7) via a sealed bearing, and an internal cooling channel is provided inside the tap body (3).

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