A replaceable head reamer

Abstract

The present invention provides a replaceable head reamer, comprising a tool handle, a tool head and a connecting assembly for connecting the tool handle and the tool head, the connecting assembly comprising a connecting bolt and a nut, a first mounting groove being provided at the front end of the tool handle, the connecting bolt comprising a head and a screw, the nut being sleeved on the screw, the head of the connecting bolt being located in the first mounting groove of the tool handle, the nut being threadedly connected to the first mounting groove, the tool head comprising a tool head body and a connecting block provided at the rear end of the tool head body, a threaded hole being provided axially at the rear end of the connecting block, the screw of the connecting bolt being inserted into the threaded hole of the connecting block and being threadedly connected to the connecting block, the connecting block being inserted into the first mounting groove of the tool handle, and an inner polygonal hole being provided at the end of the screw of the connecting bolt.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing, and more particularly to a replaceable head reamer. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and may not constitute prior art.

[0003] In mechanical processing, reamers are usually used for hole forming processing. In order to improve processing efficiency and shorten processing time, replaceable head reamers have been frequently used in the field of mechanical processing in recent years. In the existing technology, the process of replacing the cutter head is relatively complicated, time-consuming and labor-intensive. Therefore, there is an urgent need to invent a reamer that can quickly replace the cutter head.

[0004] It should be noted that the above technical background is merely provided to provide a clear and complete description of the technical solutions of the present invention and to facilitate understanding by those skilled in the art. Simply because these solutions are described in the technical background section of the present invention, it should not be assumed that the above technical solutions are well known to those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a replaceable head reamer.

[0006] In order to solve the above technical problems, the present invention provides a replaceable head reamer, comprising a shank, a cutter head and a connecting assembly for connecting the shank and the cutter head, the connecting assembly comprising a connecting bolt and a nut, a first mounting groove being provided at the front end of the shank, the connecting bolt comprising a head and a screw, the nut being sleeved on the screw, the head of the connecting bolt being located in the first mounting groove of the shank, the nut being threadedly connected to the first mounting groove, the shank comprising a cutter head body and a connecting block provided at the rear end of the cutter head body, a threaded hole being provided axially at the rear end of the connecting block, the screw of the connecting bolt being inserted into the threaded hole of the connecting block and being threadedly connected to the connecting block, the connecting block being inserted into the first mounting groove of the shank, and an inner polygonal hole being provided at the end of the screw of the connecting bolt.

[0007] Preferably, a second mounting groove is axially provided at the front end of the cutter head, the second mounting groove is connected to the threaded hole, a cutter head bolt is installed in the second mounting groove, the screw portion of the cutter head bolt is threadedly connected to the second mounting groove, and the cutter head bolt has a through hole opened along the axial direction.

[0008] Preferably, the inner polygonal hole is an inner hexagonal hole.

[0009] Preferably, the rear end face of the cutter head body is further provided with at least two stop blocks, and the front end face of the tool handle is provided with a plurality of positioning holes corresponding to the stop blocks, and the stop blocks are inserted into the positioning holes.

[0010] By means of the above technical solution, the beneficial effects of the present invention are as follows:

[0011] The replaceable head reamer of the present invention is very convenient for installing and removing the cutter head. During installation, the cutter head can be mounted on the handle by simply inserting an Allen wrench through the through hole of the cutter head bolt and turning the connecting bolt. When disassembly is required, the cutter head can be removed from the handle by simply inserting an Allen wrench through the through hole of the cutter head bolt and turning the connecting bolt in the opposite direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a reamer of the present invention.

[0013] Figure 2 It is a schematic diagram of the exploded structure of the reamer of the present invention.

[0014] Figure 3 It is a schematic diagram of the exploded structure of the reamer of the present invention.

[0015] Figure 4 It is a structural schematic diagram of a head with a water-through screw installed in the present invention.

[0016] Figure 5 It is a front structural schematic diagram of the reamer of the present invention.

[0017] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure in the AA direction.

[0018] Figure 7 It is a front structural schematic diagram of the head with the water-through screw installed in the present invention.

[0019] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure in the BB direction.

[0020] Figure 9 It is a structural diagram of a reamer in the background technology.

[0021] Among them, 1. The handle; 11. The first water outlet; 12. The first annular water flow cavity; 14. The positioning hole; 15. The first water flow channel; 16. The third water flow channel; 2. The cutter head; 21. The second water outlet; 22. The connecting block; 23. The stop block; 25. The fourth water flow channel; 26. The second annular water flow cavity; 3. The cutter head bolt; 4. The connecting bolt; 41. The second water flow channel; 42. The first water hole; 43. The head of the connecting bolt; 44. The screw of the connecting bolt; 45. The inner polygonal hole; 5. The nut. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that, in the description of the present invention, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0024] like Figure 1-8 As shown, the reamer of the present application includes a handle 1, a cutter head 2 and a connecting assembly for connecting the handle 1 and the cutter head 2, wherein the connecting assembly includes a connecting bolt 4 and a nut 5.

[0025] A first mounting groove is provided at the front end of the knife handle 1, the connecting bolt 4 includes a head and a screw 44, the nut 5 is sleeved on the screw, the head of the connecting bolt 4 is located in the first mounting groove of the knife handle 1, and the nut 5 is threadedly connected to the first mounting groove.

[0026] The cutter head 2 comprises a cutter head body 2 and a connecting block 22 provided at the rear end of the cutter head body 2. A threaded hole is provided at the rear end of the connecting block 2 along the axial direction.

[0027] The screw rod 44 of the connecting bolt 4 is inserted into the threaded hole of the connecting block 22 and is threadedly connected to the connecting block 22 . The connecting block 22 is inserted into the first mounting groove of the shank 1 .

[0028] In a preferred embodiment, the rear end face of the cutter head 2 body is further provided with at least two stop blocks 23, and the front end face of the shank 1 is provided with a plurality of positioning holes 14 corresponding to the stop blocks 23. The stop blocks 23 are inserted into the positioning holes 14 to prevent relative displacement of the cutter head 2 and the shank 1 in the radial direction.

[0029] The front end of the cutter head 2 is provided with a second mounting groove along the axial direction, the second mounting groove is connected to the threaded hole, and a cutter head 2 bolt is installed in the second mounting groove. The screw portion of the cutter head 2 bolt is threadedly connected to the second mounting groove.

[0030] The cutter head bolt 3 has a through hole opened in the axial direction. The end of the screw rod of the connecting bolt 4 is provided with an inner polygonal hole 45. Preferably, the inner polygonal hole 45 is a hexagonal hole.

[0031] The assembly process of the reamer of the present application is as follows: the nut 5 is placed on the connecting bolt 4, the head 43 of the connecting bolt 4 is inserted into the first mounting groove of the shank 1, and the connecting bolt 4 is fixed to the front end of the shank 1 through the threaded connection of the nut 5 and the first mounting groove. The screw of the connecting bolt 4 is inserted into the threaded hole of the connecting block 22 of the cutter head 2. During this process, the stop block 23 at the rear end of the cutter head 2 body is inserted into the positioning hole 14 at the front end of the shank 1, which plays a positioning role and prevents the cutter head 2 and the shank 1 from rotating relative to each other. Use an inner hexagonal wrench to pass through the through hole of the cutter head bolt 3 and insert it into the inner hexagonal hole of the connecting bolt 4. Rotate the connecting bolt 4 so that the connecting bolt 4 is threadedly connected to the connecting block 22 of the cutter head 2. During the rotation of the connecting bolt 4, the rear end face of the cutter head 2 and the front end face of the shank 1 approach each other until they are fully connected, thus completing the assembly.

[0032] The cutter head 2 of the reamer of the present application is very convenient to install and remove. During installation, the cutter head 2 can be mounted on the handle 1 by simply inserting an Allen wrench through the through hole of the cutter head bolt 3 and turning the connecting bolt 4. To remove the cutter head 2 from the handle 1, the cutter head 2 can be removed by simply inserting an Allen wrench through the through hole of the cutter head bolt 3 and turning the connecting bolt 4 in the opposite direction.

[0033] A first water flow channel 15 is axially provided at the rear end of the handle 1 , and the first water flow channel 15 is communicated with the first mounting groove.

[0034] The head 43 of the connecting bolt 4 is axially provided with a second water flow channel 41, and the second water flow channel 41 extends to the front end into the screw, and a first water hole 42 is provided on the screw, and the first water hole 42 passes through the screw horizontally, and the first water hole 42 is connected to the second water flow channel 41. In a preferred embodiment, the straight line where the first water hole 42 is located is perpendicular to the screw, and the first water hole 42 is located at the end of the second water flow channel 41.

[0035] After the reamer is assembled, there is a distance between the nut 5 and the connecting block 22. A first annular water flow cavity 12 is formed between the screw portion located between the nut 5 and the connecting block 22 and the side wall of the closed mounting groove. The first water hole is located in the first annular water flow cavity 12. The side wall of the handle 1 is also provided with a plurality of first water outlet holes 11, which are connected to the first annular water flow cavity 12.

[0036] In one embodiment, the first water outlet hole 11 is arranged along the radial direction of the shank 1, and there are two first water outlet holes 11. The two first water outlet holes 11 are respectively located at relative positions of the shank 1, and the straight line where the two first water outlet holes 11 are located is perpendicular to the straight line where the first water hole 42 is located.

[0037] After passing through the first water flow channel 15, the cooling water enters the second water flow channel 41, flows from the first water hole 42 into the first annular water flow cavity 12, and then flows out from the first water outlet 11, thereby achieving a cooling effect. Since the straight line on which the first water outlet 11 is located is perpendicular to the straight line on which the first water hole 42 is located, the cooling water flowing out of the first water hole 42 will not flow directly out of the first water outlet 11, but must first pass through the first annular water flow cavity 12, thus achieving a better cooling effect. Since the first water outlet 11 is a straight hole set perpendicular to the tool handle 1, the processing process is also more convenient.

[0038] A plurality of third water flow channels 16 extending axially are further provided in the side wall of the handle 1 . One end of the third water flow channel 16 is located at the front end surface of the handle 1 , and the other end is connected to the first water outlet 11 .

[0039] The sidewalls of the cutter head 2 body also define a plurality of fourth water flow channels 25, positioned opposite the third water flow channels 16. When the reamer is assembled, the third water flow channels 16 and the fourth water flow channels 25 communicate. One end of the fourth water flow channel 25 is located on the rear end of the cutter head 2 body, and the other end of the fourth water flow channel 25 connects to the second mounting slot. The sidewalls of the cutter head 2 also define a plurality of second water outlet holes 21, which communicate with the second mounting slot.

[0040] In a preferred embodiment, the head of the cutter head bolt 3 blocks the front end of the second mounting groove, and a second annular water flow cavity 26 is formed between the head of the cutter head bolt 3 and the side wall of the second mounting groove, and the second water outlet 21 is connected to the second annular water flow cavity 26.

[0041] After the cooling water passes through the first annular water flow cavity 12, part of it flows out from the first water outlet 11, and the other part flows into the fourth water flow channel 25 through the third water flow channel 16, then flows into the second annular water flow cavity 26, and then flows out from the second water outlet 21, achieving a cooling effect.

[0042] like Figure 9 As shown, it is a reamer in the prior art, which also has an internal cooling channel. The connection method of the cutter head 2 and the shank 1 of the reamer is different from that of the present application. The rear end of the side wall water flow channel a can only be set at the rear end of the mounting groove of the shank 1, resulting in the side wall water flow channel a being a thin-walled deep hole, which is easy to cause thin-wall deformation and deep hole drill breakage during processing.

[0043] In this application, the cutter head 2 and the handle 1 are connected by a connecting bolt 4, and a water flow channel is set in the connecting bolt 4. Therefore, the rear end of the third water flow channel 16 can be located at the position of the first bucket water hole, shortening the distance of the thin-walled hole, making processing easier, and the structure of the handle 1 is more stable and not easy to deform. In addition, the first water outlet 11 can be a straight hole, compared to Figure 9 The handle has an oblique water hole b, which makes the processing simpler.

[0044] In the present application, the front end refers to the direction from the handle 1 to the cutter head 2 , and the rear end refers to the direction opposite to the front end.

[0045] The above embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. A replaceable head reamer, characterized in that: The reamer includes a handle, a cutter head and a connecting assembly for connecting the handle and the cutter head, wherein the connecting assembly includes a connecting bolt and a nut. The front end of the knife handle is provided with a first mounting groove, the connecting bolt includes a head and a screw, the nut is sleeved on the screw, the head of the connecting bolt is located in the first mounting groove of the knife handle, and the nut is threadedly connected to the first mounting groove. The cutter head comprises a cutter head body and a connecting block arranged at the rear end of the cutter head body. The rear end of the connecting block is provided with a threaded hole along the axial direction. The screw of the connecting bolt is inserted into the threaded hole of the connecting block and is threadedly connected to the connecting block. The connecting block is inserted into the first mounting groove of the tool handle. The end of the screw of the connecting bolt is provided with an inner polygonal hole. The front end of the cutter head is provided with a second mounting groove along the axial direction, the second mounting groove is connected to the threaded hole, a cutter head bolt is installed in the second mounting groove, the screw portion of the cutter head bolt is threadedly connected to the second mounting groove, and the cutter head bolt has a through hole opened along the axial direction. The rear end of the handle is provided with a first water flow channel along the axial direction, and the head of the connecting bolt is provided with a second water flow channel along the axial direction. The first water flow channel is connected to the second water flow channel. The screw rod of the connecting bolt is provided with a first water hole, which is connected to the second water flow channel. The side wall of the knife handle is further provided with a plurality of third water flow channels extending in the axial direction, one end of the third water flow channel is located at the front end surface of the knife handle, and the other end is connected to the first water hole. The side wall of the cutter head body is further provided with a plurality of fourth water flow channels arranged opposite to the third water flow channels, the third water flow channels are connected to the fourth water flow channels, and the side wall of the cutter head is further provided with a plurality of second water outlet holes, the second water outlet holes are connected to the fourth water flow channels, The cooling water of the reamer passes through the first water flow channel, the second water flow channel, the first water hole, the third water flow channel, the fourth water flow channel in sequence, and flows out from the second water outlet hole. The side wall of the knife handle is further provided with a plurality of first water outlet holes, and the plurality of first water outlet holes are connected with the first water through hole.

2. The reamer according to claim 1, characterized in that The inner polygonal hole is an inner hexagonal hole.

3. The reamer according to claim 1, characterized in that The rear end face of the cutter head body is further provided with at least two stop blocks, and the front end face of the knife handle is provided with a plurality of positioning holes corresponding to the stop blocks, and the stop blocks are inserted into the positioning holes.

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