Inner-cooling expanding drill with segmented structure

Abstract

The utility model belongs to the technical field of expanding drills, particularly relates to an inner-cooling expanding drill with a segmented structure, and aims to solve the problem that the length of an existing expanding drill cannot be adjusted, the inner-cooling expanding drill comprises a sleeve, a cutter bar penetrates out of the sleeve, and an adjusting mechanism is arranged in the sleeve; the adjusting mechanism comprises a sliding groove, the sliding groove is formed in the outer wall of the sleeve, one side of the sliding groove is connected with a connecting groove, a positioning groove is formed above the connecting groove, a positioning rod penetrates out of the positioning groove, and a penetrating rod is fixed to the end, located in the sleeve, of the positioning rod. When the positioning rod slides along the sliding groove and reaches the position with the corresponding length, the positioning rod enters the positioning groove through the connecting groove and is screwed and pressed through the lantern ring connected with the sleeve in a threaded mode for limiting, and therefore the sleeve and the cutter bar can be rapidly assembled, adjustment can be conducted according to the needed length, and applicability and comprehensiveness are improved.

Description

Technical Field

[0001] This utility model relates to an internal cooling reamer, specifically an internal cooling reamer with a segmented structure, and belongs to the technical field. Background Technology

[0002] Reamers are generally used for semi-finishing or final machining of holes, for pre-machining before reaming or grinding, or for enlarging blank holes. They have 3 to 4 cutting edges, no chisel edge, and small changes in rake and clearance angles along the cutting edge. They provide good guiding effect during machining, have low axial resistance, and offer better cutting conditions than drilling.

[0003] In the prior art, such as the segmented reamer disclosed in CN204975444U, there is a drill shank, a drill rod, and a reamer head with a flat rectangular structure. The end of the drill shank away from the drill rod has a flat tail with a Morse taper number corresponding to the tailstock taper of the lathe. It adopts a large cutting volume and a three-section structure, which can quickly cut multi-step holes and deep holes by quickly changing drill rods and reamer heads of different diameters and lengths, saving a lot of time and labor costs. Moreover, due to the segmented structure, the quick-change reamer head part is lightweight, and machine grinding and manual grinding are more convenient and accurate.

[0004] However, in implementing the relevant technology, the segmented reamer designed above has the following problems: Although the existing technology is easy to disassemble and assemble through the cooperation of components such as the drill shank, the length cannot be adjusted according to the needs in actual use, resulting in poor applicability. In view of this, an internal cooling reamer with a segmented structure is provided to overcome the above defects. Utility Model Content

[0005] This utility model provides an internally cooled reaming drill with a segmented structure to solve the above-mentioned technical problem that the length cannot be adjusted according to the needs in actual use and the applicability is poor.

[0006] The present invention achieves the above objectives through the following technical solution: an internal cooling reaming drill with a segmented structure, comprising a sleeve, wherein a tool bar extends through the inside of the sleeve, and an adjustment mechanism is provided inside the sleeve;

[0007] The adjusting mechanism includes a slide groove, which is formed on the outer wall of the sleeve. A connecting groove is connected to one side of the slide groove. A positioning groove is provided above the connecting groove, and a positioning rod extends through the positioning groove. An inserting rod is fixed to one end of the positioning rod located inside the sleeve, and a collar is slidably connected to the lower part of the positioning rod on the outer wall of the sleeve.

[0008] As a further improvement of this utility model: the collar is threadedly connected to the sleeve, and the collar is tightly fitted with the positioning rod.

[0009] As a further improvement of this utility model: a flow ring is rotatably connected to the upper part of the outer wall of the sleeve, and a connecting pipe protrudes from the flow ring.

[0010] As a further embodiment of this utility model: a conveying mechanism is provided on the inner wall of the sleeve corresponding to the position of the flow ring. The conveying mechanism includes a slot, which is opened on the inner wall of the sleeve corresponding to the position of the flow ring, and a flow hole is opened on the outer wall of the slot.

[0011] As a further embodiment of this utility model: the conveying mechanism further includes a connecting cylinder, which is fixed at the top end inside the sleeve, and a telescopic cylinder extends out from the inside of the connecting cylinder.

[0012] As a further improvement of this utility model, the conveying mechanism also includes a positioning hole, which is opened at the top of the insert rod, and a conveying hole is opened inside the positioning hole.

[0013] As a further improvement of this utility model: the connecting cylinder and the telescopic cylinder form a sliding structure, and the connecting cylinder and the telescopic cylinder are in communication.

[0014] The beneficial effects of this utility model are: when the insert rod of the tool holder is inserted into the sleeve, it slides along the slide groove via the positioning rod. When it reaches the corresponding length position, it enters the positioning groove via the connecting groove, and is tightened and limited by the collar that is threadedly connected to the sleeve. This allows the sleeve and the tool holder to be quickly assembled, and the length can be adjusted as needed to improve applicability and versatility.

[0015] The flow ring rotates along the slot, thus avoiding affecting the rotation of the sleeve. Coolant is introduced through the connecting pipe, enters the sleeve through the flow hole, and enters the delivery hole through the positioning hole under the guidance of the connecting cylinder and the telescopic cylinder, thus entering the inside of the tool holder to achieve an internal cooling effect. The connecting cylinder and the telescopic cylinder form a telescopic rod to prevent the tool holder from being adjusted and creating gaps that would cause coolant loss and waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connecting groove structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the insertion rod structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the flow ring structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the connecting cylinder structure of this utility model.

[0021] In the diagram: 1. Sleeve; 2. Tool holder; 3. Adjusting mechanism; 301. Slide groove; 302. Connecting groove; 303. Positioning groove; 304. Inserting rod; 305. Positioning rod; 306. Collar; 4. Flow ring; 5. Connecting pipe; 6. Conveying mechanism; 601. Slot; 602. Flow hole; 603. Connecting cylinder; 604. Telescopic cylinder; 605. Positioning hole; 606. Conveying hole. Detailed Implementation

[0022] 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

[0023] like Figures 1 to 5 As shown, an internal cold reamer with a segmented structure includes a sleeve 1, a tool holder 2 extending from the inside of the sleeve 1, and an adjustment mechanism 3 disposed inside the sleeve 1. The adjustment mechanism 3 includes a slide groove 301 formed on the outer wall of the sleeve 1, a connecting groove 302 connected to one side of the slide groove 301, a positioning groove 303 disposed above the connecting groove 302, a positioning rod 305 extending from the positioning groove 303, an inserting rod 304 fixed to one end of the positioning rod 305 located inside the sleeve 1, and a collar 306 slidably connected below the positioning rod 305 on the outer wall of the sleeve 1. Ring 306 is threadedly connected to sleeve 1. Ring 306 is tightly fitted with positioning rod 305. A flow ring 4 is rotatably connected to the upper part of the outer wall of sleeve 1. A connecting tube 5 protrudes from the flow ring 4. When the insertion rod 304 of tool bar 2 is inserted into sleeve 1, it slides along the slide groove 301 via positioning rod 305. When it reaches the corresponding length position, it enters the positioning groove 303 via connecting groove 302. It is then tightened and limited by ring 306, which is threadedly connected to sleeve 1. This allows sleeve 1 and tool bar 2 to be quickly assembled and can be adjusted to the required length to improve applicability and versatility. Example 2

[0024] In addition to all the technical features in Embodiment 1, this embodiment also includes: a conveying mechanism 6 is provided on the inner wall of the sleeve 1 at the position corresponding to the flow ring 4. The conveying mechanism 6 includes a slot 601, which is opened on the inner wall of the sleeve 1 at the position corresponding to the flow ring 4. A flow hole 602 is opened on the outer wall of the slot 601. The conveying mechanism 6 also includes a connecting cylinder 603, which is fixed to the top end inside the sleeve 1. A telescopic cylinder 604 extends out from the inside of the connecting cylinder 603. The conveying mechanism 6 also includes a positioning hole 605, which is opened at the top end of the insert rod 304. The inner end of the positioning hole 605... The part has a conveying hole 606. The connecting cylinder 603 and the telescopic cylinder 604 form a sliding structure and are connected. The connecting cylinder 603 and the telescopic cylinder 604 rotate along the groove 601 through the flow ring 4 to avoid affecting the rotation of the sleeve 1. The coolant is introduced through the connecting pipe 5, enters the sleeve 1 through the flow hole 602, and enters the conveying hole 606 through the positioning hole 605 under the guidance of the connecting cylinder 603 and the telescopic cylinder 604, so as to enter the inside of the tool holder 2 to achieve an internal cooling effect. The connecting cylinder 603 and the telescopic cylinder 604 form a telescopic rod to prevent the tool holder 2 from having gaps during position adjustment, which would cause coolant loss and waste.

[0025] Working principle: The insertion rod 304 of the fixed tool holder 2 is inserted into the sleeve 1. The positioning rod 305 slides along the slide groove 301. When it reaches the corresponding length, it passes through the connecting groove 302 and enters the positioning groove 303. Then, the collar 306 is turned to abut against the positioning rod 305 for limiting, thus achieving quick assembly and disassembly. At the same time, it is set in a segmented form, so that the tool holder 2 can be replaced when there is a problem. The flow ring 4 is rotatably connected to the outside of the sleeve 1 through the slot 601, so that coolant can be introduced to the external supply device through the connecting pipe 5, avoiding the flow ring 4 and the sleeve 1 from being limited. When the sleeve 1 rotates, the coolant enters the connecting cylinder 603 through the flow hole 602. The telescopic cylinder 604 slides along the connecting cylinder 603 and enters the positioning hole 605 of the tool holder 2 to keep it aligned, so that the coolant enters the delivery hole 606 of the tool holder 2 and flows out through the reserved hole of the tool head at the bottom of the tool holder 2, thus achieving the internal cooling effect.

[0026] 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.

[0027] 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. An internally cooled gun drill having a segmented construction comprising a sleeve (1) characterised in that: The sleeve (1) has a knife bar (2) extending through its interior, and the sleeve (1) is equipped with an adjustment mechanism (3). The adjustment mechanism (3) includes a slide groove (301), which is opened on the outer wall of the sleeve (1). A connecting groove (302) is connected to one side of the slide groove (301). A positioning groove (303) is provided above the connecting groove (302). A positioning rod (305) extends through the positioning groove (303). An inserting rod (304) is fixed at one end of the positioning rod (305) inside the sleeve (1). A collar (306) is slidably connected below the positioning rod (305) on the outer wall of the sleeve (1).

2. The inner-cooled gun drill having a segmented structure according to claim 1, characterized in that: The collar (306) is threadedly connected to the sleeve (1), and the collar (306) is tightly fitted with the positioning rod (305).

3. The inner-cooled gun drill having a segmented structure according to claim 1, characterized in that: A flow ring (4) is rotatably connected above the outer wall of the sleeve (1), and a connecting pipe (5) protrudes from the flow ring (4).

4. The inner-cooled gun drill having a segmented structure according to claim 1, characterized in that: The inner wall of the sleeve (1) is provided with a conveying mechanism (6) at the position corresponding to the flow ring (4). The conveying mechanism (6) includes a slot (601). The slot (601) is opened at the position corresponding to the flow ring (4) on the inner wall of the sleeve (1), and a flow hole (602) is opened on the outer wall of the slot (601).

5. The internal cooling reamer with a segmented structure according to claim 4, characterized in that: The conveying mechanism (6) also includes a connecting cylinder (603), which is fixed to the top of the sleeve (1), and a telescopic cylinder (604) extends through the inside of the connecting cylinder (603).

6. The inner-cooled gun drill having a segmented structure according to claim 4, characterized in that: The conveying mechanism (6) also includes a positioning hole (605), which is located at the top of the insertion rod (304), and a conveying hole (606) is provided inside the positioning hole (605).

7. The inner-cooled gun drill having a segmented structure according to claim 5, characterized in that: The connecting cylinder (603) and the telescopic cylinder (604) form a sliding structure, and the connecting cylinder (603) and the telescopic cylinder (604) are connected.

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