Stepped straight shank screw tap

Abstract

The utility model discloses a stepped straight shank screw tap. The tool comprises a base cone, a step installation assembly arranged on the surface of the base cone and a stable installation assembly arranged on the surface of the base cone, the step installation assembly comprises an open hole formed in the surface of the base, a first screw hole is formed in the open hole, a polygonal hole is formed in the base, and a cone handle is connected into the polygonal hole in a matched mode. The taper shank can be conveniently inserted into the bottom cone through the polygonal hole formed in the surface of the bottom cone, the polygonal hole formed in the surface of the bottom cone is consistent with the polygonal structure of the taper shank, convenient and stable installation of the bottom cone is facilitated, the open hole is formed in the surface of the bottom cone, a connecting position is provided for the first screw hole through the open hole, and the first screw hole is formed in the opening. The first screw holes are formed in the two sides of the surface of the taper shank, the second screw holes are formed in the two sides of the surface of the taper shank, during use, the first screw holes, the second screw holes and the interiors of the open holes are aligned, bolts are screwed in the first screw holes and the second screw holes, the taper shank is stably installed in the base cone, the installation opening is formed in the bottom of the taper shank, and the step installation process is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of straight shank tap equipment, in particular to a stepped straight shank tap. Background Art

[0002] For machining ordinary internal threads on nuts or other machine parts (i.e., tapping). Machine taps usually refer to high-speed steel grinding taps, which are suitable for tapping on machine tools; hand taps refer to carbon tool steel or alloy tool steel rolling taps (or cutting taps), which are suitable for manual tapping. A tap is a tool for machining various medium and small-sized internal threads. It has a simple structure and is easy to use. It can be operated manually or on a machine tool, and is widely used in production. For small-sized internal threads, the tap is almost the only machining tool. The types of taps include: hand taps, machine taps, nut taps, extrusion taps, etc. Tapping is a relatively difficult machining process because the tap is almost buried in the workpiece for cutting. The machining load per tooth is larger than that of other tools, and the contact area between the tap and the workpiece along the thread is very large. When cutting the thread, it must accommodate and remove the chips. Therefore, it can be said that the tap works under very harsh conditions. In order to make tapping proceed smoothly, various possible problems should be considered in advance. Such as the performance of the workpiece material, the selection of tools and machine tools, the cutting speed, feed rate, etc.

[0003] The existing publicly disclosed patent (publication number: CN205129101U) discloses a high-directivity tap, which includes a tap shank and a tap body. A tap neck is provided between the tap body and the tap shank, and the diameter of the tap neck is smaller than the minor diameter of the tap body; a guiding column is provided at the front end of the tap body, the diameter of the guiding column is smaller than the minor diameter of the tap body, and a tapered transition section is provided at the connection between the guiding column and the tap body; a front taper is provided at the front end of the guiding column; a clamping portion is provided at the outer end of the tap shank, and a rear taper is also provided at the end of the outer end of the tap shank; 3-5 chip flutes are evenly arranged on the outer circumference of the tap body. This high-directivity tap not only has good directivity, but also is convenient for clamping and grinding, and can also prevent damage to the thread.

[0004] However, there are some problems in the use of the existing straight shank guiding tap: 1. When assembling and installing the existing straight shank guiding tap on the market, there is a lack of a stepped installation measure for the overall guiding extension installation, which reduces the overall installation convenience and is not convenient for stable extended guiding; 2. When the existing straight shank guiding tap is in use, its overall installation stability is poor. Generally, when the tap is externally connected and installed, there is often an extension of the extended end, which hinders the overall work and is not aesthetically pleasing. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a stepped straight shank tap to solve the problems raised in the above-mentioned background technology.

[0006] To solve the above technical problems, the present utility model provides the following technical solutions: It includes a bottom tap, a stepped mounting component arranged on the surface of the bottom tap, and a stable mounting component arranged on the surface of the bottom tap;

[0007] The stepped mounting component includes an opening formed on the surface of the base, a first screw hole formed inside the opening, a polygonal hole formed inside the base, a taper shank fitted and connected inside the polygonal hole, the taper shank having a polygonal structure, and a bolt fitted and connected inside the first screw hole, and the taper shank is installed with stepped extension through the bolt;

[0008] The stable mounting component includes a mounting port formed on the top of the taper shank, a first inclined hole formed inside the mounting port, an internal thread formed inside the first inclined hole, and a taper rod fitted and connected inside the mounting port, and the taper rod is installed through the first inclined hole.

[0009] As a further scheme of the present utility model: The stepped mounting component further includes a second screw hole formed on the surface of the taper shank, the first screw hole and the second screw hole are fitted and connected with bolts, and the first screw hole, the second screw hole and the opening are aligned inside.

[0010] As a further scheme of the present utility model: The stable mounting component further includes a second inclined hole formed on the surface of the taper rod, and the first inclined hole and the second inclined hole are aligned inside.

[0011] As a further scheme of the present utility model: Bolts are fitted and connected inside the first inclined hole and the second inclined hole, and an internal thread is formed inside the second inclined hole.

[0012] As a further scheme of the present utility model: Taper grooves are formed on the surface of the taper shank, and there are multiple taper grooves distributed in an array.

[0013] As a further scheme of the present utility model: Tooth-shaped angles are fixedly connected to the surface of the taper rod, and there are multiple tooth-shaped angles located on both sides of the taper rod.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] When the utility model is installed step by step, the bottom cone is convenient for the insertion of the taper shank through the polygonal holes opened on the surface. The polygonal holes opened on the surface of the bottom cone are consistent with the polygonal structure of the taper shank, which is convenient for its convenient and stable installation. Openings are provided on the surface of the bottom cone, which provide connection positions for the first screw holes. The first screw holes are opened inside the openings, and second screw holes are opened on both sides of the surface of the taper shank. When in use, the first screw holes, the second screw holes and the openings are aligned, and bolts are tightened therein to stably install the taper shank inside the bottom cone. An installation opening is also provided at the bottom of the taper shank, thus forming a step installation process. Then, when the straight shank pilot tap is assembled and installed, there is a measure for step installation for the overall guiding and extending installation, thereby improving the overall installation convenience and facilitating stable extended guiding.

[0016] The utility model places the upper taper rod inside the installation opening. Second inclined holes are provided on both sides of the surface of the taper rod. The second inclined holes are opened from both sides of the surface of the taper rod and penetrate through the bottom of the taper rod, so that the connection between the taper rod and the outside is increased through the second inclined holes. After the taper rod is located inside the installation opening, the second inclined holes are aligned with the first inclined holes opened at the inner bottom of the installation opening, and bolts can be tightened inside the first inclined holes and the second inclined holes to fix the taper rod in the installation opening. Internal threads are provided inside both the first inclined holes and the second inclined holes, which is convenient for their stable connection. The bolts are movably connected to the inside of the second inclined holes, which is convenient for their concealment. Then, when the straight shank pilot tap is in use, its overall installation stability is high, reducing the problem that the extension end will protrude when the tap is externally connected and installed, reducing the obstruction to the overall work, and the overall appearance is more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of the embodiment of the utility model;

[0018] Figure 2 is the structural schematic diagram of the bottom cone of the embodiment of the utility model;

[0019] Figure 3 is the structural schematic diagram of the taper shank of the embodiment of the utility model;

[0020] Figure 4 is the internal structural schematic diagram of the first inclined hole of the embodiment of the utility model.

[0021] In the figure: 1, bottom cone; 201, opening; 202, first screw hole; 203, bolt; 204, polygonal hole; 205, taper shank; 206, second screw hole; 3, taper groove; 401, installation opening; 402, first inclined hole; 403, taper rod; 404, second inclined hole; 405, internal thread; 5, tooth profile angle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] For the convenience of solving problems, an embodiment of the present utility model provides a stepped straight shank tap. The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0023] As Figures 1 to 4 shown, this embodiment provides a stepped straight shank tap, including a bottom tap 1, a stepped mounting assembly arranged on the surface of the bottom tap 1, and a stable mounting assembly arranged on the surface of the bottom tap 1. The stepped mounting assembly includes an opening 201 opened on the surface of the base, a first screw hole 202 opened inside the opening 201, a polygonal hole 204 opened inside the base, a taper shank 205 connected in cooperation inside the polygonal hole 204. The taper shank 205 has a polygonal structure, and a bolt 203 is connected in cooperation inside the first screw hole 202. The taper shank 205 is installed with stepped extension through the bolt 203. The stable mounting assembly includes a mounting port 401 opened on the top of the taper shank 205, a first inclined hole 402 opened inside the mounting port 401, and an internal thread 405 opened inside the first inclined hole 402. A taper rod 403 is connected in cooperation inside the mounting port 401. The taper rod 403 is installed through the first inclined hole 402. Embodiment 2

[0024] In addition to including all the technical features in Embodiment 1 in this embodiment, it further includes: the stepped mounting assembly further includes a second screw hole 206 opened on the surface of the taper shank 205. The bolt 203 is connected in cooperation inside the first screw hole 202 and the second screw hole 206. The first screw hole 202, the second screw hole 206, and the opening 201 are aligned. The connection between the bottom tap 1 and the taper shank 205 is increased through the first screw hole 202 and the second screw hole 206, making it convenient for installation and disassembly.

[0025] Furthermore, the stable mounting assembly further includes a second inclined hole 404 opened on the surface of the taper rod 403. The first inclined hole 402 and the second inclined hole 404 are aligned. The bolt 203 is connected in cooperation inside the first inclined hole 402 and the second inclined hole 404. The internal thread 405 is opened inside the second inclined hole 404. The connection points of the taper rod 403 are increased through the first inclined hole 402 and the second inclined hole 404, making it convenient for installation, and the inclined fixation makes its installation more stable.

[0026] Furthermore, a tapered groove 3 is formed on the surface of the taper shank 205. The tapered grooves 3 are multiple and distributed in an array. A tooth-shaped angle 5 is fixedly connected to the surface of the taper rod 403. The tooth-shaped angles 5 are multiple and located on both sides of the taper rod 403. The tapered groove 3 facilitates the operation, and the overall tap structure is formed by multiple tooth-shaped angles 5, making it convenient for wire guiding during operation.

[0027] Working principle: The bottom taper 1 is provided with a polygonal hole 204 on its surface to facilitate the insertion of the taper shank 205. The polygonal hole 204 formed on the surface of the bottom taper 1 has the same polygonal structure as the taper shank 205, facilitating its convenient and stable installation. An opening 201 is formed on the surface of the bottom taper 1, providing a connection position for the first screw hole 202. The first screw hole 202 is formed inside the opening. Second screw holes 206 are formed on both sides of the surface of the taper shank 205. During use, the first screw hole 202, the second screw hole 206, and the opening 201 are aligned, and a bolt 203 is screwed therein to stably install the taper shank 205 inside the bottom taper 1. An installation port 401 is also formed at the bottom of the taper shank 205, thus forming a stepped installation process. Then, when the straight shank pilot tap is assembled and installed, second inclined holes 404 are formed on both sides of the surface of the taper rod 403. The second inclined holes 404 are formed from both sides of the surface of the taper rod 403 and penetrate through the bottom of the taper rod 403, increasing the connectivity of the taper rod 403 with the outside through the second inclined holes 404. After the taper rod 403 is located inside the installation port 401, the second inclined holes 404 are aligned with the first inclined holes 402 formed at the inner bottom of the installation port 401. Then, bolts 203 can be screwed into the first inclined holes 402 and the second inclined holes 404 to fix the taper rod 403 in the installation port 401. Internal threads 405 are formed in both the first inclined holes 402 and the second inclined holes 404 to facilitate their stable connection. The bolt 203 is movably connected to the inside of the second inclined hole 404, making it convenient for hiding.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard 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 stepped straight shank tap, characterized in that: It includes a bottom cone (1), a stepped mounting component arranged on the surface of the bottom cone (1), and a stable mounting component arranged on the surface of the bottom cone (1); The stepped mounting component includes an opening (201) opened on the surface of the base. A first screw hole (202) is opened inside the opening (201). A polygonal hole (204) is opened inside the base. A taper shank (205) is connected in a mating manner inside the polygonal hole (204). The taper shank (205) has a polygonal structure. A bolt (203) is connected in a mating manner inside the first screw hole (202). The taper shank (205) is installed in a stepped extension manner through the bolt (203); The stable mounting component includes a mounting port (401) opened at the top of the taper shank (205). A first inclined hole (402) is opened inside the mounting port (401). Internal threads (405) are opened inside the first inclined hole (402). A taper rod (403) is connected in a mating manner inside the mounting port (401). The taper rod (403) is installed through the first inclined hole (402).

2. The stepped straight shank tap according to claim 1, wherein: The stepped mounting component further includes a second screw hole (206) opened on the surface of the taper shank (205). Bolts (203) are connected in a mating manner inside the first screw hole (202) and the second screw hole (206). The first screw hole (202), the second screw hole (206), and the opening (201) are aligned inside; 3. A stepped straight shank tap according to claim 1, characterized in that: The stable mounting component further includes a second inclined hole (404) opened on the surface of the taper rod (403). The first inclined hole (402) and the second inclined hole (404) are aligned inside; 4. The step-type straight shank tap according to claim 3, characterized in that: Bolts (203) are connected in a mating manner inside the first inclined hole (402) and the second inclined hole (404). Internal threads (405) are opened inside the second inclined hole (404).

5. A stepped straight shank tap according to claim 1, characterized in that: Conical grooves (3) are opened on the surface of the taper shank (205). There are multiple conical grooves (3) and they are distributed in an array; 6. The step-type straight shank tap according to claim 1, characterized in that: Tooth-shaped angles (5) are fixedly connected to the surface of the taper rod (403). There are multiple tooth-shaped angles (5) and they are located on both sides of the taper rod (403).

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