Milling cutter convenient to replace

Abstract

The utility model discloses a milling cutter convenient to replace, which relates to the technical field of milling cutters, and comprises a milling cutter body and a positioning mechanism, the positioning mechanism comprises a lifting sleeve sleeved on the outer wall of a mounting seat, the bottom of the inner wall of the lifting sleeve is provided with an extrusion circular truncated cone surface, and the outer wall of the mounting seat is provided with a plurality of movable holes; connecting rods are movably connected to the inner walls of the multiple movable holes in a penetrating and inserting mode, and contact mechanisms are arranged between the connecting rods and the milling cutter body. By means of the arrangement of the lifting sleeve, the extrusion circular truncated cone face, the movable hole and the connecting rod, the lifting sleeve moves downwards on the outer wall of the installation base, the extrusion circular truncated cone face extrudes the connecting rod, and therefore the multiple contact mechanisms move at the same time till the multiple contact mechanisms tightly abut against the milling cutter body; therefore, the milling cutter body can be kept coaxial with the mounting seat after being mounted, so that the milling cutter body cannot eccentrically rotate when the mounting seat rotates to drive the milling cutter body to work, and the mounting stability of the milling cutter body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to milling cutter technical field, especially a kind of milling cutter convenient to replace. BACKGROUND

[0002] Milling cutter is used for milling processing, with one or more cutter teeth, when working, each cutter tooth cuts off the excess of workpiece in turn intermittently.

[0003] Milling cutter is directly inserted into mounting seat for installation when using, and it is very convenient to replace, and new milling cutter can be installed by taking down from mounting seat.

[0004] Now the installation of milling cutter in mounting seat is mostly positioned by bolt, that is, after milling cutter is inserted into mounting seat, it can be fixed by bolt tightened against milling cutter, but the inner wall of mounting hole in mounting seat is not closely matched with the outer wall of milling cutter, so that after single bolt is against milling cutter, milling cutter and mounting seat are not in coaxial state, so that when mounting seat drives milling cutter to work, eccentric rotation phenomenon of milling cutter occurs, thereby reducing the stability of milling cutter installation. SUMMARY

[0005] The utility model aims at providing a kind of milling cutter convenient to replace to solve the problems presented in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of milling cutter convenient to replace, comprising:

[0007] Milling cutter body, the upper portion of the milling cutter body is provided with a mounting seat, and the milling cutter body is inserted and installed at the bottom end of the mounting seat.

[0008] Positioning mechanism, the positioning mechanism is arranged between the milling cutter body and the mounting seat, the positioning mechanism includes a lifting sleeve arranged on the outer wall of the mounting seat, a pressing circular platform is formed in the bottom of the inner wall of the lifting sleeve, a plurality of movable holes are formed in the outer wall of the mounting seat, a connecting rod is movably connected to the inner wall of each movable hole, and a contact mechanism is arranged between the connecting rod and the milling cutter body.

[0009] Preferably, the contact mechanism includes a pressing block, the inner wall of the movable hole is provided with a movable cavity, the outer wall of the pressing block is slidably connected to the inner wall of the movable cavity, one side of the pressing block is fixedly connected to one end of the connecting rod, and a reset mechanism is arranged in the movable hole.

[0010] Preferably, the reset mechanism includes a movable groove formed in the inner wall of the movable hole, the inner wall of the movable groove is slidably connected to a fixed ring, the fixed ring is fixedly sleeved to the outer wall of the connecting rod, one side of the fixed ring is provided with a spring, and the spring is sleeved to the outer wall of the connecting rod.

[0011] Preferably, the outer wall of the mounting base is provided with a sliding groove, and the top of the inner wall of the lifting sleeve is fixedly connected with a sliding block, and the outer wall of the sliding block is in sliding connection with the inner wall of the sliding groove.

[0012] Preferably, the inner wall of the sliding groove is rotationally connected with a lead screw, and the top end of the sliding block is provided with a threaded hole, and the outer wall of the lead screw is in threaded connection with the inner wall of the threaded hole.

[0013] Preferably, the inside of the mounting base is provided with a connecting cavity, the top end of the lead screw is rotationally connected with the top end of the inner wall of the connecting cavity, the outer wall of the lead screw and located in the inside of the connecting cavity is fixedly sleeved with a worm wheel, the inner wall of the connecting cavity is rotationally connected with a worm, the outer wall of the worm is in meshing connection with the outer wall of the lead screw, and the inner wall of the connecting cavity is provided with a rotating hole, and the outer wall of the worm is in rotational connection with the inner wall of the rotating hole.

[0014] The technical effects and advantages of the present application are as follows:

[0015] The present application utilizes the setting of the lifting sleeve, the extrusion circular table surface, the movable hole and the connecting rod, when the milling cutter body is inserted into the mounting hole, the lifting sleeve is moved downward outside the mounting base, the extrusion circular table surface extrudes the connecting rod, so that the multiple connecting rods move with the contact mechanisms, until the multiple contact mechanisms tightly abut against the milling cutter body, which can ensure that the milling cutter body is coaxial with the mounting base after installation, and when the mounting base rotates to drive the milling cutter body to work, the milling cutter body will not eccentrically rotate, thereby improving the installation stability of the milling cutter body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a front sectional view structural schematic diagram of the present application.

[0017] Fig. 2 It is a lifting sleeve three-dimensional structure schematic diagram of the present application.

[0018] Fig. 3 It is a mounting base bottom sectional view structural schematic diagram of the present application.

[0019] In the drawing: 101, milling cutter body; 102, mounting base; 201, lifting sleeve; 202, extrusion circular table surface; 203, movable hole; 204, connecting rod; 301, movable cavity; 302, extrusion block; 401, movable slot; 402, fixed ring; 403, spring; 501, sliding groove; 502, sliding block; 601, lead screw; 602, threaded hole; 701, connecting cavity; 702, worm wheel; 704, worm; 705, rotating hole. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0021] The utility model provides a kind of milling cutter convenient to replace as shown in Figs. 1-3 It is provided with mounting seat 102 on the top of milling cutter body 101, and the bottom end of mounting seat 102 is installed with milling cutter body 101, and mounting hole is opened in the bottom end of mounting seat 102, and milling cutter body 101 is inserted and arranged in the inside of mounting hole.

[0022] In a preferred embodiment, the positioning mechanism is arranged between the milling cutter body 101 and the mounting seat 102, and the positioning mechanism includes a lifting sleeve 201 fitted on the outer wall of the mounting seat 102, a pressing circular platform 202 is opened in the bottom of the inner wall of the lifting sleeve 201, a plurality of movable holes 203 are opened in the outer wall of the mounting seat 102, a connecting rod 204 is movably inserted and connected in the inner wall of each movable hole 203, and a contact mechanism is arranged between the connecting rod 204 and the milling cutter body 101. When the milling cutter body 101 is inserted into the mounting hole, the lifting sleeve 201 is moved downward on the outer wall of the mounting seat 102, so that the pressing circular platform 202 extrudes the connecting rod 204, so that the plurality of connecting rods 204 move with the contact mechanism at the same time, until the plurality of contact mechanisms tightly abut against the milling cutter body 101, which can ensure that the milling cutter body 101 maintains the coaxial state with the mounting seat 102 after installation, so that the milling cutter body 101 does not appear eccentric rotation phenomenon when the mounting seat 102 rotates to drive the milling cutter body 101 to work, thereby improving the installation stability of the milling cutter body 101.

[0023] The contact mechanism includes an extrusion block 302, and the inner wall of the movable hole 203 is provided with a movable cavity 301, the outer wall of the extrusion block 302 is slidably connected with the inner wall of the movable cavity 301, one side of the extrusion block 302 is fixedly connected with one end of the connecting rod 204, and the inside of the movable hole 203 is provided with a reset mechanism. Through the arrangement of the extrusion block 302, the contact area between the milling cutter body 101 and the milling cutter body 101 during installation is increased, thereby increasing the stability of the installation of the milling cutter body 101.

[0024] The reset mechanism comprises a movable groove 401 formed in the inner wall of the movable hole 203, the inner wall of the movable groove 401 is slidably connected with a fixed ring 402, the fixed ring 402 is fixedly sleeved on the outer wall of the connecting rod 204, one side of the fixed ring 402 is provided with a spring 403, the spring 403 is sleeved on the outer wall of the connecting rod 204, when the milling cutter body 101 is installed, the connecting rod 204 is moved and the fixed ring 402 is moved under the extrusion of the extrusion circular platform 202, so that the spring 403 is compressed, when the milling cutter body 101 is disassembled, the lifting sleeve 201 moves upwards, under the elastic action of the spring 403, the connecting rod 204 reversely moves until the connecting rod 204 is completely retracted into the movable hole 203, at this time, the extrusion block 302 can be accommodated into the movable cavity 301, so that the new milling cutter body 101 can be inserted into the mounting hole without being blocked, thereby improving the convenience of replacing the milling cutter body 101.

[0025] The outer wall of the mounting seat 102 is provided with a sliding groove 501, the inner wall of the lifting sleeve 201 is fixedly connected with a sliding block 502 at the top, the outer wall of the sliding block 502 is slidably connected with the inner wall of the sliding groove 501, by moving the sliding block 502 in the sliding groove 501, the lifting sleeve 201 can move on the outer wall of the mounting seat 102, and the sliding block 502 is limited by the sliding groove 501, so that the lifting sleeve 201 can be limited on the outer wall of the mounting seat 102, and the stability of the lifting sleeve 201 is improved.

[0026] The inner wall of the sliding groove 501 is rotatably connected with a lead screw 601, the top end of the sliding block 502 is provided with a threaded hole 602, the outer wall of the lead screw 601 is threadedly connected with the inner wall of the threaded hole 602, by rotating the lead screw 601 in the sliding groove 501, the sliding block 502 can be driven to move in the sliding groove 501 under the threaded engagement between the outer wall of the lead screw 601 and the inner wall of the threaded hole 602, so that the lifting sleeve 201 is driven to move, the convenience of the positioning mechanism is improved, and the lateral force of the sliding block 502 caused by the rotation of the lead screw 601 can be offset by the limitation of the sliding groove 501 on the sliding block 502, so that the rotation of the lead screw 601 can stably drive the sliding block 502 to move up and down.

[0027] The inside of the mounting seat 102 is provided with a connecting cavity 701, the top end of the lead screw 601 is rotationally connected with the top end of the inner wall of the connecting cavity 701, the outer wall of the lead screw 601 and located inside the connecting cavity 701 is fixedly sleeved with a worm wheel 702, the inner wall of the connecting cavity 701 is rotationally connected with a worm 704, the outer wall of the worm 704 is meshingly connected with the outer wall of the lead screw 601, the inner wall of the connecting cavity 701 is provided with a rotating hole 705, the outer wall of the worm 704 is rotationally connected with the inner wall of the rotating hole 705, the meshed worm wheel 702 can be driven to rotate by rotating the worm 704 inside the connecting cavity 701, so as to drive the lead screw 601 to rotate, so that the positioning mechanism works, and the lead angle of the worm 704 is smaller than the equivalent friction angle between the gear teeth of the worm wheel 702, so that the worm 704 and the worm wheel 702 have self-locking property, only the worm 704 can drive the worm wheel 702 to rotate, the worm wheel 702 cannot drive the worm 704 to rotate, so that the positioning mechanism will not automatically work, thereby improving the stability of the positioning mechanism work, and through the setting of the rotating hole 705, the operator can insert the screwdriver into the rotating hole 705 outside the mounting seat 102 to twist the worm 704, so as to drive the worm wheel 702 to rotate, thereby improving the convenience of the positioning mechanism operation.

[0028] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model have described, and not for limiting the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A throwaway milling cutter characterized by, The application relates to a milling cutter body (101) provided with a mounting seat (102) at the top, and the milling cutter body (101) is inserted into the bottom end of the mounting seat (102); a positioning mechanism is arranged between the milling cutter body (101) and the mounting seat (102), and the positioning mechanism comprises a lifting sleeve (201) sleeved on the outer wall of the mounting seat (102), a pressing circular platform (202) is formed in the bottom of the inner wall of the lifting sleeve (201), a plurality of movable holes (203) are formed in the outer wall of the mounting seat (102), a connecting rod (204) is movably inserted into the inner wall of each movable hole (203), and a contact mechanism is arranged between the connecting rod (204) and the milling cutter body (101). The contact mechanism comprises a pressing block (302), a movable cavity (301) is formed in the inner wall of the movable hole (203), the outer wall of the pressing block (302) is slidably connected with the inner wall of the movable cavity (301), one side of the pressing block (302) is fixedly connected with one end of the connecting rod (204), and a reset mechanism is arranged in the movable hole (203). The reset mechanism comprises a movable groove (401) formed in the inner wall of the movable hole (203), a fixing ring (402) is slidably connected with the inner wall of the movable groove (401), the fixing ring (402) is fixedly sleeved on the outer wall of the connecting rod (204), one side of the fixing ring (402) is provided with a spring (403), and the spring (403) is sleeved on the outer wall of the connecting rod (204).

2. A throwaway milling cutter according to claim 1, wherein A sliding groove (501) is formed in the outer wall of the mounting seat (102), a sliding block (502) is fixedly connected with the top of the inner wall of the lifting sleeve (201), and the outer wall of the sliding block (502) is slidably connected with the inner wall of the sliding groove (501).

3. A throwaway milling cutter according to claim 2, wherein A screw rod (601) is rotatably connected with the inner wall of the sliding groove (501), a threaded hole (602) is formed in the top of the sliding block (502), and the outer wall of the screw rod (601) is threadedly connected with the inner wall of the threaded hole (602).

4. The throwaway milling cutter of claim 1 wherein, A connecting cavity (701) is formed in the mounting seat (102), the top of the screw rod (601) is rotatably connected with the top of the inner wall of the connecting cavity (701), a worm wheel (702) is fixedly sleeved on the outer wall of the screw rod (601) and located in the connecting cavity (701), a worm (704) is rotatably connected with the inner wall of the connecting cavity (701), the outer wall of the worm (704) is meshingly connected with the outer wall of the screw rod (601), a rotating hole (705) is formed in the inner wall of the connecting cavity (701), and the outer wall of the worm (704) is rotatably connected with the inner wall of the rotating hole (705).

5. A throwaway milling cutter according to claim 4, wherein ​ 6. A throwaway milling cutter according to claim 5, wherein ​

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