Screw tap
By designing a multifunctional tap that can process four- and six-point internal threads at the same time, the inefficiency and high cost problems caused by operators' frequent replacement of taps is solved, and the effect of convenient replacement and reduced cost is achieved.
Patent Information
- Application Number
- CN202422204628.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-09
AI Technical Summary
When installing or repairing water pipe joints of PPr material, operators need to frequently replace taps of different models, resulting in low operating efficiency, high procurement costs and heavy carrying burden.
A tap including a first screw part, a mating part and a second screw part is designed. The diameters of the first screw part and the second screw part are different, and the four- and six-point internal threads can be processed respectively. The mating part is configured for clamping of the open-end wrench to simplify the replacement process.
The processing of two internal threads of different sizes is achieved, reducing the complexity and time of replacing taps, improving working efficiency, and reducing the manufacturing cost of machining tools.
Smart Images
Figure CN222999804U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of processing tools, in particular to a tap. Background Art
[0002] A tap is a tool for processing internal threads. When installing or repairing a water pipe joint made of PPr (pentatricopeptide repeats, random copolymer polypropylene), a manual tap is often used, and the commonly used models are quarter-inch and six-inch. Usually, when different models of taps are required during the installation or repair process, the operator needs to find the corresponding model for replacement, and the process of searching for the tap will affect the operation efficiency. Purchasing two models of taps results in a high procurement cost of repair tools; in addition, the operator carrying two different models of taps also increases the carrying burden. Content of the Utility Model
[0003] The purpose of the utility model is to provide a tap, which can process internal threads of two different sizes, and has low manufacturing cost, is portable and easy to replace.
[0004] To achieve the above object, the utility model adopts the following technical solutions:
[0005] A tap, which comprises a first thread part, a matching part and a second thread part arranged coaxially. The first thread part and the second thread part are respectively connected to both ends of the matching part. The matching part is configured to be clamped by an open-end wrench, and the diameter of the first thread part is not equal to the diameter of the second thread part.
[0006] As an optional solution, a first matching hole is arranged on the end face of the first thread part, and the first matching hole is configured to cooperate with an external tool. A second matching hole is arranged on the end face of the second thread part, and the second matching hole is configured to cooperate with an external tool.
[0007] As an optional solution, the first matching hole and the second matching hole are communicated, and the cross-sectional shapes of the first matching hole and the second matching hole are the same and the sizes are equal.
[0008] As an optional solution, the cross-section of the first matching hole is square, and the cross-section of the second matching hole is square.
[0009] As an optional solution, the matching part includes four matching surfaces along the circumferential direction, and the projections of the four matching surfaces in a plane perpendicular to the axial direction of the tap are located on a square.
[0010] As an alternative, the distance between the two relatively arranged mating surfaces is less than the diameter of the first thread portion and less than the diameter of the second thread portion.
[0011] As an alternative, the first thread portion is a standard quarter-inch thread, and the second thread portion is a standard six - inch thread.
[0012] As an alternative, a plurality of first chip - discharging grooves extending axially are circumferentially arranged on the first thread portion, and a corresponding number of second chip - discharging grooves are circumferentially arranged on the second thread portion. Each of the second chip - discharging grooves is arranged directly opposite to one of the first chip - discharging grooves. In a plane perpendicular to the axis of the tap, the projection of the first chip - discharging groove falls on the projection of the second chip - discharging groove.
[0013] As an alternative, the first thread portion includes a first thread body and a first guiding portion. The first thread body is connected to the mating portion, and the first guiding portion is connected to one end of the first thread body away from the mating portion. The diameter of the first guiding portion is less than the diameter of the first thread portion;
[0014] The second thread portion includes a second thread body and a second guiding portion. The second thread body is connected to the mating portion, and the second guiding portion is connected to one end of the second thread body away from the mating portion. The diameter of the second guiding portion is less than the diameter of the second thread portion.
[0015] As an alternative, a first conical guiding surface is provided between the first guiding portion and the first thread body; and / or
[0016] A second conical guiding surface is provided between the second guiding portion and the second thread body.
[0017] The beneficial effects of the present utility model are as follows:
[0018] The tap of the present utility model includes a first thread portion, a mating portion, and a second thread portion. During use, an open - end wrench is clamped on the mating portion, and the operator can operate the open - end wrench to tap the part with the internal thread to be processed. Since the diameter sizes of the first thread portion and the second thread portion are different, this tap can be used to process two different - sized internal threads. It is not only portable but also does not require rummaging when replacing. Just directly reverse the direction of the tap, which improves the replacement efficiency and thus is beneficial to improving the overall operation efficiency. Since the first thread portion and the second thread portion share the mating portion, on the basis of being able to process two different - sized internal threads, the manufacturing cost of the processing tool is reduced. Description of the Drawings
[0019] Figure 1It is a schematic structural diagram of a tap provided by the specific embodiment of the present utility model;
[0020] Figure 2 It is a top view of the tap provided by the specific embodiment of the present utility model;
[0021] Figure 3 is Figure 2 the A-A cross-sectional view in
[0022] Figure 4 It is a side view of the tap provided by the specific embodiment of the present utility model;
[0023] Figure 5 is Figure 4 the B-B cross-sectional view in
[0024] In the figure:
[0025] 1. First thread part; 11. First mating hole; 12. First chip removal groove; 13. First thread body; 14. First guiding part; 15. First conical guiding surface;
[0026] 2. Mating part; 21. Mating surface;
[0027] 3. Second thread part; 31. Second mating hole; 32. Second chip removal groove; 33. Second thread body; 34. Second guiding part; 35. Second conical guiding surface. Specific embodiment
[0028] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.
[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.
[0031] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0032] This embodiment provides a tap which can be used for tapping pipe fittings made of PPr materials, and can also be used for tapping other parts that need to process internal threads.
[0033] As Figure 1 shown, the tap is generally a columnar component, and includes a first thread part 1, a fitting part 2 and a second thread part 3 which are coaxially arranged. The first thread part 1 and the second thread part 3 are respectively connected to both ends of the fitting part 2. The fitting part 2 is configured to be clamped by an open-end wrench. The diameters of the first thread part 1 and the second thread part 3 are not equal. When using the tap of this embodiment, the open-end wrench is clamped on the fitting part 2, and the operator can operate the open-end wrench to tap the part to be processed with internal threads. Since the diameters of the first thread part 1 and the second thread part 3 are different, this tap can be used to process internal threads of two different sizes. It is not only portable, but also does not need to search again when replacing. Just turn the tap around directly, which improves the replacement efficiency and thus is beneficial to improving the overall operation efficiency. Since the first thread part 1 and the second thread part 3 share the fitting part 2, on the basis of being able to process internal threads of two different sizes, the manufacturing cost of the processing tool is reduced. In addition, compared with the existing single-head tap, the tap of this embodiment can omit steps such as grooving and flattening (steps for processing the clamping end of the tap), which is not only convenient for processing, but also reduces the waste of materials.
[0034] Optionally, the tap can be made of any one of carbon tool steel, alloy tool steel, high-speed steel, etc., and no specific limitation is made here.
[0035] In this embodiment, the first thread portion 1 is a standard quarter-inch thread, and the second thread portion 3 is a standard six-inch thread. It can be understood that in other embodiments, the specific dimensions of the first thread portion 1 and the specific dimensions of the second thread portion 3 can be flexibly set as needed, as long as the diameters of the two are different.
[0036] Specifically, as Figure 1 and Figure 2 shown, a plurality of first chip flutes 12 extending axially are circumferentially provided on the first thread portion 1, and a corresponding number of second chip flutes 32 are circumferentially provided on the second thread portion 3. Each second chip flute 32 is disposed directly opposite to a first chip flute 12. In a plane perpendicular to the axial direction of the tap, the projection of the first chip flute 12 falls on the projection of the second chip flute 32. Therefore, when machining the tap, the relatively arranged first chip flutes 12 and second chip flutes 32 can be machined in one cut, thereby greatly improving the machining efficiency of the tap and reducing the manufacturing cost of the tap.
[0037] As Figure 3 shown, a first mating hole 11 is provided on the end face of the first thread portion 1, and the first mating hole 11 is configured to cooperate with an external tool. A second mating hole 31 is provided on the end face of the second thread portion 3, and the second mating hole 31 is configured to cooperate with an external tool. By providing the first mating hole 11 and the second mating hole 31, the tap can not only be used in cooperation with an open-end wrench for work, but also be used in cooperation with electric tools such as an electric drill and a four-way small fly wrench, etc., making the use mode of the tap more and the operation more convenient.
[0038] As Figure 3 shown, the first mating hole 11 and the second mating hole 31 are communicated with each other, and the cross-sectional shapes and sizes of the first mating hole 11 and the second mating hole 31 are the same. On the one hand, it is ensured that when using the first thread portion 1 and the second thread portion 3, the same tool can be used for cooperation; on the other hand, when machining the tap, the first mating hole 11 and the second mating hole 31 can be machined synchronously in one cut, thereby greatly improving the machining efficiency of the tap and reducing the manufacturing cost of the tap. It should be noted that when the first mating hole 11 and the second mating hole 31 are used in cooperation with an electric drill, an existing adapter can be used.
[0039] In this embodiment, the cross-section of the first mating hole 11 is square, and the cross-section of the second mating hole 31 is also square. In other embodiments, the cross-sections of the first mating hole 11 and the second mating hole 31 can also be hexagonal or other shapes, which are not specifically limited herein.
[0040] As Figure 1 and Figure 4As shown, the first thread part 1 includes a first thread main body 13 and a first guiding part 14. The first thread main body 13 is connected to the mating part 2, and the first guiding part 14 is connected to one end of the first thread main body 13 away from the mating part 2. The diameter of the first guiding part 14 is smaller than that of the first thread part 1. By providing the first guiding part 14, the first thread part 1 can be accurately and smoothly positioned into the hole to be machined, thereby improving the convenience of using the tap. Optionally, the axial dimension of the first guiding part 14 is L2, and L2 is greater than or equal to 2 mm. The above dimension can ensure the reliability of positioning. Specifically, the value of L2 can be 2 mm, 3 mm, 4 mm, etc.
[0041] In this embodiment, a first tapered guiding surface 15 is provided between the first guiding part 14 and the first thread main body 13. The first tapered guiding surface 15 transitions the connection between the first guiding part 14 and the first thread main body 13, so that the threading process of the first thread part 1 is smoother.
[0042] As Figure 1 and Figure 4 shown, the second thread part 3 includes a second thread main body 33 and a second guiding part 34. The second thread main body 33 is connected to the mating part 2, and the second guiding part 34 is connected to one end of the second thread main body 33 away from the mating part 2. The diameter of the second guiding part 34 is smaller than that of the second thread part 3. By providing the second guiding part 34, the second thread part 3 can be accurately and smoothly positioned into the hole to be machined, thereby improving the convenience of using the tap. Optionally, the axial dimension of the second guiding part 34 is L3, and L3 is greater than or equal to 2 mm. The above dimension can ensure the reliability of positioning. Specifically, the value of L3 can be 2 mm, 3 mm, 4 mm, etc.
[0043] In this embodiment, a second tapered guiding surface 35 is provided between the second guiding part 34 and the second thread main body 33. The second tapered guiding surface 35 transitions the connection between the second guiding part 34 and the second thread main body 33, so that the threading process of the second thread part 3 is smoother.
[0044] As Figure 4 and Figure 5As shown, the engaging portion 2 includes four engaging surfaces 21 in the circumferential direction. The projections of the four engaging surfaces 21 in a plane perpendicular to the axial direction of the tap are located on a square. That is to say, the cross-section of the engaging portion 2 is approximately square. Such a setting not only facilitates reliable engagement with an open-end wrench, but also can engage with the open-end wrench at any 90° rotation, improving the usability of the tap. In this embodiment, each engaging surface 21 includes two spaced planes, and there is a groove surface between the two spaced planes, which is naturally formed when machining the first chip flutes 12 and the second chip flutes 32. Of course, in other embodiments, each engaging surface 21 can also be set as a single plane, which is not specifically limited here.
[0045] In this embodiment, the distance between two relatively arranged engaging surfaces 21 is less than the diameter of the first thread portion 1 and less than the diameter of the second thread portion 3. Such a setting enables the end faces of the first thread portion 1 and the second thread portion 3 facing each other to axially limit the open-end wrench, thereby ensuring the reliability of the engagement between the open-end wrench and the engaging portion 2.
[0046] Optionally, the axial dimension of the engaging portion 2 is L1, where L1 is greater than or equal to 6 mm and less than or equal to 10 mm. By setting the engaging portion 2 within the above dimension range, it is ensured that the open-end wrench can be inserted between the first thread portion 1 and the second thread portion 3 and engage with the engaging portion 2. Specifically, the value of L1 can be 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.
[0047] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, based on the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation on the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. A tap, characterized in that: The tap comprises a first screw thread portion (1), a matching portion (2) and a second screw thread portion (3) which are coaxially arranged, the first screw thread portion (1) and the second screw thread portion (3) being respectively connected to two ends of the matching portion (2), the matching portion (2) being configured to be clamped by an open-end wrench, and the diameter of the first screw thread portion (1) is not equal to the diameter of the second screw thread portion (3).
2. The tap according to claim 1, characterized in that: A first matching hole (11) is provided on the end surface of the first screw thread portion (1), and the first matching hole (11) is configured to match with an external tool. A second matching hole (31) is provided on the end surface of the second screw thread portion (3), and the second matching hole (31) is configured to match with an external tool.
3. The tap according to claim 2, characterized in that: The first matching hole (11) and the second matching hole (31) are connected, and the cross-section of the first matching hole (11) and the cross-section of the second matching hole (31) are of the same shape and size.
4. The tap according to claim 2, characterized in that: The cross section of the first matching hole (11) is a square, and the cross section of the second matching hole (31) is a square.
5. The tap according to any one of claims 1 to 4, characterized in that: The matching portion (2) comprises four matching surfaces (21) along the circumferential direction, and the projections of the four matching surfaces (21) in a plane perpendicular to the axial direction of the tap are located on a square.
6. The tap according to claim 5, characterized in that: The distance between the two mating surfaces (21) arranged opposite to each other is smaller than the diameter of the first screw thread portion (1), and smaller than the diameter of the second screw thread portion (3).
7. The tap according to any one of claims 1 to 4, characterized in that: The first thread portion (1) is a standard quarter-thread thread, and the second thread portion (3) is a standard six-thread thread.
8. The tap according to any one of claims 1 to 4, characterized in that: The first thread portion (1) is provided with a plurality of first chip removal grooves (12) extending in the axial direction in the circumferential direction, and the second thread portion (3) is provided with a corresponding number of second chip removal grooves (32) in the circumferential direction, and each of the second chip removal grooves (32) is arranged opposite to a first chip removal groove (12), and in a plane perpendicular to the axial direction of the tap, the projection of the first chip removal groove (12) falls on the projection of the second chip removal groove (32).
9. The tap according to any one of claims 1 to 4, characterized in that: The first screw thread portion (1) comprises a first screw thread body (13) and a first guide portion (14); the first screw thread body (13) is connected to the matching portion (2); the first guide portion (14) is connected to an end of the first screw thread body (13) away from the matching portion (2); and the diameter of the first guide portion (14) is smaller than the diameter of the first screw thread portion (1); The second screw thread portion (3) comprises a second screw thread body (33) and a second guide portion (34); the second screw thread body (33) is connected to the matching portion (2); the second guide portion (34) is connected to an end of the second screw thread body (33) away from the matching portion (2); and the diameter of the second guide portion (34) is smaller than the diameter of the second screw thread portion (3).
10. The tap according to claim 9, characterized in that: A first conical guide surface (15) is provided between the first guide portion (14) and the first screw thread body (13); and / or A second tapered guide surface (35) is provided between the second guide portion (34) and the second screw thread body (33).