CN216325377U

CN216325377U - Double-head twist drill structure

Info

Publication number: CN216325377U
Application number: CN202122984982.0U
Authority: CN
Inventors: 张小龙
Original assignee: Taizhou Wanlongda Measuring Tools Manufacture Co ltd
Current assignee: Taizhou Wanlongda Measuring Tools Manufacture Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-04-19
Anticipated expiration: 2031-11-29

Abstract

The utility model provides a double-head twist drill structure, and belongs to the field of machine tool accessories. It has solved the inconvenient problem of current fluted drill use. The double-head twist drill structure comprises a handle part and two drill rods respectively arranged at two ends of the handle part, wherein cold water channels axially penetrate through the two drill rods, one end of each cold water channel extends to the handle part, and the two cold water channels are not communicated; the stalk portion overcoat has the barrel, barrel and stalk portion axial fixity, circumferential direction, forms two annular chambers that each other does not communicate between barrel and the stalk portion, and two annular chambers distribute along the stalk portion axial, are equipped with the water conservancy diversion hole that makes two cold water passageway communicate two annular chambers respectively in the stalk portion, are equipped with two inlet openings that make two annular chambers communicate with the outside respectively on the barrel. This double-end twist drill structure convenient to use.

Description

Double-head twist drill structure

Technical Field

The utility model belongs to the field of machine tool accessories, and relates to a twist drill, in particular to a double-head twist drill structure.

Background

Twist drills are tools that drill round holes in a workpiece by rotary cutting thereof about a fixed axis.

Twist drills currently available on the market are generally classified into single-bit twist drills and double-bit twist drills. When the twist drill bit is used, the twist drill bit is blunt generally and needs to be sharpened again, and the double-head structure is adopted, so that one sharpening operation is omitted.

The conventional double-head twist drill comprises a drill handle, wherein two ends of the drill handle are respectively connected with a drill bit, each drill bit is provided with a spiral chip groove, the drill handle is provided with a water inlet hole, and the water inlet hole extends into the drill handle; and a cooling water tank is arranged in each drill bit, the two cooling water tanks are communicated with the water inlet hole in the drill handle, and the end parts of the drill bits of the cooling water tanks are provided with openings.

Because the twist drill only uses one drill bit at a time when in use, in actual operation, a cooling water tank at the position of the drill bit which is not used needs to be blocked, and the blockage is generally carried out by a rubber piece at present. Because the aperture of the cooling water tank is generally small, the rubber part is difficult to enter the cooling water tank, multiple operations are needed, and the plugging effect is not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provides a double-head twist drill structure convenient to use.

The purpose of the utility model can be realized by the following technical scheme: the double-head twist drill structure comprises a handle part and two drill rods respectively arranged at two ends of the handle part, wherein cold water channels axially penetrate through the two drill rods, and one ends of the cold water channels extend to the handle part; the stalk portion overcoat has the barrel, barrel and stalk portion axial fixity, circumferential direction, forms two annular chambers that each other does not communicate between barrel and the stalk portion, and two annular chambers distribute along the stalk portion axial, are equipped with the water conservancy diversion hole that makes two cold water passageway communicate two annular chambers respectively in the stalk portion, are equipped with two inlet openings that make two annular chambers communicate with the outside respectively on the barrel.

When the cooling device is used, one of the water inlet holes is connected with an external water inlet pipeline, and cooling water is sent into the corresponding cold water channel through the corresponding annular cavity and is used for drilling and cooling the drill rod.

Set up two cold water passageways and do not communicate, and two cold water passageways all communicate with the external world through independent annular chamber and inlet opening cooperation to through only the operation of an inlet opening connection outside inlet channel, impel two cold water passageways to be in two opposite states (one goes out water, one can not go out water), like this when actual operation, alright need not the shutoff and need not the cold water passageway of going out water, it is comparatively convenient to operate.

In foretell double-end twist drill structure, the stalk portion lateral wall is the periphery, integrated into one piece has the sealed portion that matches and be annular with the stalk portion on the foretell barrel inner wall, and the sealed portion has threely and distributes along the barrel axial, and the sealed portion cup joints on the stalk portion, and every sealed portion all forms sealedly through sealing washer and stalk portion, forms foretell annular chamber between two adjacent sealed portions and barrel and the stalk portion, is equipped with the limit structure who is used for restricting barrel axial displacement on the stalk portion. Under the cooperation of the two schemes of the limit structure and the inner wall of the sealing part leaning against the outer wall of the handle part, the barrel is effectively limited in the radial direction and the axial direction, the barrel can be enabled to stably rotate relative to the handle part, and the working stability is improved.

In foretell double-end twist drill structure, limit structure includes that integrated into one piece establishes and fixes the spacing ring on the stalk portion with the cover on the stalk portion outer wall, and the barrel is in between annular convex shoulder and the spacing ring, and annular convex shoulder and spacing ring pressure-sharing have simple structure, simple to operate's advantage on corresponding the sealing.

In foretell double-end fluted drill structure, spacing ring and stalk portion can dismantle through the screw and link firmly, realize the spacing ring through rotating like this and reciprocate to the different mounted position of adaptation barrel, the equipment of not only being convenient for, the practicality is also high moreover.

In the double-head twist drill structure, the two end faces of the two sealing parts, which are back to back, are respectively flush with the two end faces of the cylinder body, so that the limiting ring is completely positioned outside the cylinder body, and the disassembly and the assembly are convenient.

As another scheme, in foretell double-end twist drill structure, limit structure includes two clamping rings that all overlap on the stalk portion, and the clamping ring links firmly with the stalk portion, and the barrel both ends are supported respectively and are pressed on two clamping rings.

In the double-head twist drill structure, the annular groove is formed in the inner side wall of the sealing part, the sealing ring is located in the annular groove, and the inner side wall of the sealing ring is abutted to the outer side wall of the handle part, so that reliable sealing is formed between the sealing part and the handle part.

In the double-head twist drill structure, the outer side wall of the handle part is formed with the conical surface, the diameter of the conical surface is gradually increased from the limiting ring to the annular shoulder, the inner hole of one sealing part is a conical hole matched with the conical surface, and the conical surface is attached to the wall of the conical hole. The barrel is matched with the conical surface through one of the sealing parts and is used for correcting the position of the barrel, ensuring that the barrel and the handle part are in a coaxial state and enhancing the working stability.

In the above-described double-ended twist drill structure, one end of the tapered surface extends to the annular shoulder.

In foretell double-end twist drill structure, be equipped with the internal thread on the inlet opening, be convenient for connect outside inlet channel.

As another scheme, in the above double-head twist drill structure, the cylinder is connected with the handle through the bearing, and the purposes of axial fixation and circumferential rotation of the cylinder and the handle can also be stably realized.

Compared with the prior art, this double-end fluted drill structure has following advantage:

1. set up two cold water passageways and do not communicate, and two cold water passageways all communicate with the external world through independent annular chamber and inlet opening cooperation to through only the operation of an inlet opening connection outside inlet channel, impel two cold water passageways to be in two opposite states (one goes out water, one can not go out water), like this when actual operation, alright need not the shutoff and need not the cold water passageway of going out water, it is comparatively convenient to operate.

2. The cylinder body is matched with the conical surface through one of the sealing part conical holes and is used for correcting the position of the cylinder body, ensuring that the cylinder body and the handle part are in a coaxial state and enhancing the working stability.

Drawings

Fig. 1 is a schematic structural diagram of the double-head twist drill.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic view of the position structure of the handle and the drill rod.

In the figure, 1, handle; 1a, a flow guide hole; 1b, an annular shoulder; 1c, a conical surface; 2. a drill stem; 2a, a cold water channel; 3. a barrel; 3a, a water inlet hole; 3b, a sealing part; 4. an annular cavity; 5. a seal ring; 6. a limit ring.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, the double-head twist drill structure comprises a handle part 1 and two drill rods 2 respectively arranged at two ends of the handle part 1, wherein cold water channels 2a axially penetrate through the two drill rods 2, one ends of the cold water channels 2a extend to the handle part 1, and the other ends of the cold water channels 2a extend to the end faces of the drill rods 2. In practical products, the handle 1 and the two drill rods 2 are of an integrated structure, and the length of the cold water channel 2a extends along the axis of the handle 1.

In particular, the present invention relates to a method for producing,

the two cold water channels 2a are not communicated;

the barrel 3 has been wrapped to stalk portion 1 overcoat,

barrel

3 and 1 axial fixity of stalk portion, circumferential direction, forms two annular chambers 4 that each other do not communicate between barrel 3 and the stalk portion 1, and two annular chambers 4 distribute along 1 axial of stalk portion, are equipped with the water conservancy diversion hole 1a that makes two cold water passageway 2a communicate two annular chambers 4 respectively in the stalk portion 1, are equipped with two inlet openings 3a that make two annular chambers 4 respectively with the outside intercommunication on the barrel 3. When the cooling device is used, one of the water inlet holes 3a is connected with an external water inlet pipeline, and cooling water is sent into the corresponding cold water channel 2a through the corresponding annular cavity 4 and is used for drilling and cooling the drill rod 2.

Wherein the content of the first and second substances,

the axis of inlet opening 3a and water conservancy diversion hole 1a all is perpendicular with cold water passageway 2a axis, and is equipped with the internal thread on the preferred inlet opening 3a, and the inlet opening 3a of being convenient for connects outside inlet channel.

As shown in fig. 1 and 2, the cylinder 3 is mounted as follows: the outer side wall of the handle part 1 is a circumferential surface; integrated into one piece has on 3 inner walls of barrel and matches and be annular sealing 3b of circle with stalk portion 1, and sealing 3b has threely and distributes along 3 axial of barrel, and sealing 3b cup joints on stalk portion 1, and at this moment, sealing 3b inside wall pastes with 1 lateral wall of stalk portion and leans on, and every sealing 3b all forms sealedly through sealing washer 5 and stalk portion 1. The annular cavity 4 is formed between the two adjacent sealing parts 3b and the barrel 3 and the handle part 1, and the handle part 1 is provided with a limiting structure for limiting the axial movement of the barrel 3. Under the cooperation of the two schemes of the limit structure and the inner wall of the sealing part 3b leaning against the outer wall of the handle part 1, the barrel body 3 is effectively limited in the radial direction and the axial direction, the barrel body 3 can be enabled to stably rotate relative to the handle part 1, and the working stability is improved.

In the present embodiment, it is preferred that,

the sealing ring 5 is mounted as follows: the annular groove is formed in the inner side wall of the sealing part 3b, the sealing ring 5 is located in the annular groove, and the inner side wall of the sealing ring 5 abuts against the outer side wall of the handle part 1, so that reliable sealing is formed between the sealing part 3b and the handle part 1.

The limiting structure comprises an annular convex shoulder 1b and a limiting ring 6, wherein the annular convex shoulder 1b is integrally formed on the outer wall of the handle part 1, the limiting ring 6 is sleeved and fixed on the handle part 1, the barrel body 3 is positioned between the annular convex shoulder 1b and the limiting ring 6, and the annular convex shoulder 1b and the limiting ring 6 are pressed on the corresponding sealing part 3b in a pressure sharing mode.

Further, the limiting ring 6 and the handle part 1 are detachably and fixedly connected through threads, so that the limiting ring 6 can move up and down through rotation, and the limiting ring is matched with different installation positions of the barrel body 3, so that the assembly is convenient, and the practicability is high. Two end faces of the two sealing parts 3b, which are opposite to each other, are respectively flush with two end faces of the barrel 3, so that the limiting ring 6 is completely positioned outside the barrel 3, and the disassembly and the assembly are convenient.

As shown in fig. 1 and 3, a tapered surface 1c is formed on the outer side wall of the handle 1, the diameter of the tapered surface 1c gradually increases from the limit ring 6 to the annular shoulder 1b, the inner hole of one of the sealing parts 3b is a tapered hole matched with the tapered surface 1c, and the tapered surface 1c is attached to the wall of the tapered hole. The cylinder 3 is matched with the conical surface 1c through one sealing part 3b and is used for correcting the position of the cylinder 3, ensuring that the cylinder 3 and the handle 1 are in a coaxial state and enhancing the working stability. Preferably, one end of the conical surface 1c extends to the annular shoulder 1b, in which case this sealing portion 3b close to the annular shoulder 1b cooperates with the conical surface 1 c.

Example two

The structure and principle of the second embodiment are basically the same as those of the first embodiment, and different points are as follows: the limiting structure comprises two pressure rings which are all sleeved on the handle part 1, the pressure rings are fixedly connected with the handle part 1, and two ends of the barrel body 3 are respectively pressed on the two pressure rings.

EXAMPLE III

The structure and principle of the third embodiment are basically the same as those of the first embodiment, and different points are as follows: the barrel 3 is connected with the handle part 1 through a bearing, and the purposes of axial fixation and circumferential rotation of the barrel 3 and the handle part 1 can also be stably realized.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The double-head twist drill structure comprises a handle part (1) and two drill rods (2) respectively arranged at two ends of the handle part (1), wherein cold water channels (2a) axially penetrate through the two drill rods (2), one ends of the cold water channels (2a) extend to the handle part (1), and the double-head twist drill structure is characterized in that the two cold water channels (2a) are not communicated; the stalk portion (1) overcoat has barrel (3), barrel (3) and stalk portion (1) axial fixity, circumferential direction, form two annular chambers (4) that each other do not communicate between barrel (3) and stalk portion (1), and handle portion (1) axial distribution is followed in two annular chambers (4), be equipped with in stalk portion (1) and make two cold water passageway (2a) feed through water conservancy diversion hole (1a) of two annular chambers (4) respectively, be equipped with on barrel (3) and make two annular chambers (4) respectively with two inlet openings (3a) of outside intercommunication.

2. The double-head twist drill structure according to claim 1, wherein the outer side wall of the handle part (1) is a circumferential surface, the inner wall of the cylinder body (3) is integrally formed with three annular sealing parts (3b) which are matched with the handle part (1), the sealing parts (3b) are axially distributed along the cylinder body (3), the sealing parts (3b) are sleeved on the handle part (1), each sealing part (3b) forms a seal with the handle part (1) through a sealing ring (5), the annular cavity (4) is formed between each two adjacent sealing parts (3b) and the cylinder body (3) and the handle part (1), and the handle part (1) is provided with a limiting structure for limiting the axial movement of the cylinder body (3).

3. The double-ended twist drill structure according to claim 2, wherein the stop structure comprises an annular shoulder (1b) integrally formed on the outer wall of the shank (1) and a stop ring (6) sleeved and fixed on the shank (1), the cylinder (3) is located between the annular shoulder (1b) and the stop ring (6), and the annular shoulder (1b) and the stop ring (6) are pressure-equalized on the corresponding sealing portion (3 b).

4. A double-ended twist drill structure according to claim 3, wherein the stop collar (6) and the shank (1) are removably attached by a screw thread.

5. A double-ended twist drill structure according to claim 4, wherein the two end faces of the two sealing portions (3b) opposite to each other are flush with the two end faces of the cylindrical body (3), respectively.

6. The double-ended twist drill structure according to claim 2, wherein the limiting structure comprises two pressing rings which are sleeved on the handle portion (1), the pressing rings are fixedly connected with the handle portion (1), and two ends of the cylinder (3) are respectively pressed against the two pressing rings.

7. A double-ended twist drill structure according to claim 2, wherein the sealing portion (3b) has an annular groove formed in an inner side wall thereof, the sealing ring (5) is disposed in the annular groove, and the inner side wall of the sealing ring (5) abuts against an outer side wall of the shank portion (1).

8. The double-ended twist drill structure according to claim 1, wherein the outer side wall of the shank portion (1) is formed with a tapered surface (1c), the diameter of the tapered surface (1c) gradually increases from the stop ring (6) to the annular shoulder (1b), the inner hole of one of the sealing portions (3b) is a tapered hole matched with the tapered surface (1c), and the tapered surface (1c) abuts against the wall of the tapered hole.

9. A double-ended twist drill structure according to claim 1, characterized in that the water inlet hole (3a) is provided with an internal thread.

10. A double-ended twist drill structure according to claim 1, characterized in that the barrel (3) is connected to the shank (1) by means of a bearing.