Novel milling cutter with extensible cutter handle

Abstract

The utility model relates to the technical field of milling cutter design, in particular to a novel milling cutter with an extendable cutter handle, which overcomes the defects of milling cutter design in the prior art and comprises a milling cutter head, the surface of the milling cutter head is slidably connected with the cutter handle, the surface of the cutter handle is fixedly connected with a cutter body, and the cutter body is fixed by a machine tool. A threaded cylinder is fixedly connected to the interior of the cutter body in a penetrating mode, a threaded rod is connected to the interior of the threaded cylinder in a threaded mode, an ejector rod is fixedly connected to one end of the threaded rod, an ejector block is fixedly connected to the inner wall of the cutter body, a second rack plate is fixedly connected to one end of the milling cutter head, and the second rack plate is slidably connected with the ejector block; one side of the cutter handle is fixedly connected with a pair of second fixing plates, the interiors of the second fixing plates are rotationally connected with rotating rods, and the surfaces of the rotating rods are fixedly connected with gears.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutter design, in particular to a novel milling cutter with an extendable shank. Background Art

[0002] A milling cutter is a rotating tool with one or more teeth used for milling processing. When working, each tooth intermittently cuts off the excess of the workpiece in turn. The milling cutter is mainly used to process planes, steps, grooves, formed surfaces and cut off workpieces on a milling machine. In order to extend the service life of the milling cutter as much as possible when the thickness of the workpiece is different, some improvements need to be made to the milling cutter body. The existing milling cutter can only be moved up and down by machine tool control, but the distance between its cutter head and the shank cannot be increased or reduced. In the processing of some very thick workpieces, it is very likely that the distance between the milling cutter head and the shank will be less than the thickness of the workpiece, making it impossible to process. When the workpiece is very thin, the extension distance of the milling cutter head is too long, which can easily cause the milling cutter to break, so some improvements are needed.

[0003] Therefore, it is necessary to have a new type of milling cutter with an extendable shank, which has strong design practicality, an extendable milling cutter and a wide range of applications. Utility Model Content

[0004] The utility model aims to provide a novel milling cutter with an extendable shank to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of milling cutter with an extendable shank, comprising a milling cutter head, a shank is slidably connected to the surface of the milling cutter head, a blade is fixedly connected to the surface of the shank, the blade is fixed by a machine tool, a threaded barrel is fixedly connected to the inside of the blade, a screw is threadedly connected to the inside of the threaded barrel, one end of the screw is fixedly connected to a push rod, the inner wall of the blade is fixedly connected to a push block, one end of the milling cutter head is fixedly connected to a rack plate 2, the rack plate 2 is slidably connected to the push block, one side of the shank is fixedly connected to a pair of fixed plates 2, the fixed plate 2 is rotatably connected to a rotating rod, the surface of the rotating rod is fixedly connected to a gear, the gear is meshed with the rack plate 2, the friction coefficient of the rotating rod and the fixed plate 2 is relatively large, a pair of rack plates 1 are slidably connected to the inner wall of the blade, the rack plate 1 is meshed with the gear, one end of the rack plate 1 is fixedly connected to a connecting plate, a pair of fixed plates 1 are fixedly connected to the inside of the blade, and a pair of springs are directly provided between the fixed plate 1 and the connecting plate.

[0006] According to the above technical solution, a pair of guide rods are fixedly connected to one side of the fixing plate, the guide rods are located at the center of the spring, and the guide rods pass through the connecting plate and are slidably connected to the inside of the connecting plate.

[0007] According to the above technical solution, rubber pads are fixedly connected to the second surface of the rack plate, and the position of the rubber pads corresponds to the push rod.

[0008] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0009] (1) By setting up a gear rack assembly, the screw rod is rotated to make it out of the state of squeezing the rack plate 2. At this time, the milling cutter head is pulled, and the milling cutter head drives the rack plate 2 fixed on one side to move downward. The rack plate 2 moves downward to drive the gear engaged on one side to rotate. The gear rotates and pushes the rack plate 1 engaged on the other side to slide in the opposite direction. The rack plate 1 drives the connecting plate to squeeze upward, and the spring contracts. At this time, the screw rod is rotated, and the screw rod moves toward the inside of the blade, driving the push rod to press against the rack plate 2. The push block is fixed by force. The extension length of the milling cutter head is reasonably selected according to the processing conditions. When processing some workpieces with smaller thickness, the extension distance of the milling cutter head can be reduced, reducing the possibility of tool breakage, and effectively extending the tool life. By rotating and loosening the screw rod, the elastic force of the spring can be used to restore the milling cutter head and the tool handle to their original default length, thereby increasing work efficiency.

[0010] (2) A guide rod is provided to prevent the spring from bending and to assist the spring in stretching or shortening, so that the displacement of the connecting plate is smoother.

[0011] (3) A rubber pad is provided to protect the rack plate 2 and prevent the surface of the rack plate 2 from being worn due to excessive squeezing force of the push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 It is a top view of the blade of the utility model;

[0014] Figure 3 It is a schematic diagram of the gear rack assembly of the utility model;

[0015] Figure 4 It is a schematic diagram of the spring assembly of the utility model;

[0016] In the figure: 1. milling cutter head; 2. tool handle; 3. blade; 4. screw; 5. threaded barrel; 6. ejector rod; 7. ejector block; 8. fixed plate 1; 9. rack plate 1; 10. connecting plate; 11. spring; 12. rack plate 2; 13. fixed plate 2; 14. rotating rod; 15. guide rod; 16. gear; 17. rubber pad. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4 The utility model provides a technical solution: a new type of milling cutter with an extendable shank, comprising a milling cutter head 1, a shank 2 is slidably connected to the surface of the milling cutter head 1, a blade 3 is fixedly connected to the surface of the shank 2, the blade 3 is fixed by a machine tool, a threaded barrel 5 is fixedly connected to the inside of the blade 3, a screw 4 is threadedly connected to the inside of the threaded barrel 5, a top rod 6 is fixedly connected to one end of the screw 4, a top block 7 is fixedly connected to the inner wall of the blade 3, a rack plate 12 is fixedly connected to one end of the milling cutter head 1, the rack plate 12 is slidably connected to the top block 7, and one side of the shank 2 is fixed A pair of fixed plates 13 are connected, and a rotating rod 14 is rotatably connected inside the fixed plate 13. A gear 16 is fixedly connected to the surface of the rotating rod 14. The gear 16 is meshed with the rack plate 12. The friction coefficient between the rotating rod 14 and the fixed plate 13 is relatively large. A pair of rack plates 9 are connected to the inner wall of the blade body 3 in a sliding manner. The rack plate 9 is meshed with the gear 16. One end of the rack plate 9 is fixedly connected to a connecting plate 10. A pair of fixed plates 8 are fixedly connected inside the blade body 3. A pair of springs 11 are directly provided between the fixed plate 8 and the connecting plate 10.

[0019] Specifically, Figure 3 The distance between the milling cutter head 1 and the tool handle 2 needs to be lengthened to adapt to the processing of thicker workpieces. The screw rod 4 is rotated to make it out of the state of squeezing the rack plate 2 12. At this time, the milling cutter head 1 is pulled, and the milling cutter head 1 drives the rack plate 2 12 fixed on one side to move downward. The rack plate 2 12 moves downward to drive the gear 16 engaged on one side to rotate. The gear 16 rotates and moves the rack plate 1 9 engaged on the other side to slide in the opposite direction. The rack plate 1 9 drives the connecting plate 10 to squeeze upward, and the spring 1 1 contracts, and the screw rod 4 is rotated at this time, and the screw rod 4 moves toward the inside of the blade body 3, driving the ejector rod 6 to press against the rack plate 12, and the ejector block 7 is fixed by force. The extension length of the milling cutter head 1 is reasonably selected according to the processing conditions. When processing some workpieces with smaller thickness, the extension distance of the milling cutter head 1 can be reduced, the possibility of tool breakage can be reduced, and the service life of the tool can be effectively extended. By rotating and loosening the screw rod 4, the elastic force of the spring 11 can be used to restore the milling cutter head 1 and the shank 2 to their original default lengths, thereby increasing work efficiency.

[0020] A pair of guide rods 15 are fixedly connected to one side of the fixed plate 8. The guide rods 15 are located at the center of the spring 11. The guide rods 15 pass through the connecting plate 10 and are slidably connected to the inside thereof.

[0021] Specifically, the guide rod 15 is used to prevent the spring 11 from bending and to assist the spring 11 in stretching or shortening, so that the connection plate 10 can move more smoothly.

[0022] A rubber pad 17 is fixedly connected to the surface of the rack plate 12 , and the position of the rubber pad 17 corresponds to the push rod 6 .

[0023] Specifically, the rubber pad 17 is used to protect the rack plate 12 to prevent the surface of the rack plate 12 from being worn due to excessive squeezing force of the push rod 6 .

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A novel milling cutter with an extendable shank, comprising a milling cutter head (1), characterized in that: The surface of the milling cutter head (1) is slidably connected to a tool handle (2), the surface of the tool handle (2) is fixedly connected to a blade body (3), the blade body (3) is fixed by a machine tool, a threaded barrel (5) is fixedly connected to the inside of the blade body (3), a screw rod (4) is threadedly connected to the inside of the threaded barrel (5), one end of the screw rod (4) is fixedly connected to a push rod (6), the inner wall of the blade body (3) is fixedly connected to a push block (7), one end of the milling cutter head (1) is fixedly connected to a rack plate (12), the rack plate (12) is slidably connected to the push block (7), one side of the tool handle (2) is fixedly connected to a pair of fixed plates (13), the fixed A rotating rod (14) is rotatably connected inside the fixed plate (13), a gear (16) is fixedly connected to the surface of the rotating rod (14), the gear (16) is meshingly connected to the rack plate (12), the rotating rod (14) and the fixed plate (13) have a large friction coefficient, a pair of rack plates (9) are slidably connected to the inner wall of the blade body (3), the rack plate (9) is meshingly connected to the gear (16), one end of the rack plate (9) is fixedly connected to a connecting plate (10), a pair of fixed plates (8) are fixedly connected inside the blade body (3), and a pair of springs (11) are directly provided between the fixed plate (8) and the connecting plate (10).

2. A new type of milling cutter with an extendable shank according to claim 1, characterized in that: A pair of guide rods (15) are fixedly connected to one side of the fixed plate (8), and the guide rods (15) are located at the center of the spring (11). The guide rods (15) pass through the connecting plate (10) and are slidably connected to the inside of the connecting plate (10).

3. The novel milling cutter with an extendable shank according to claim 1 is characterized in that: A rubber pad (17) is fixedly connected to the surface of the second rack plate (12), and the position of the rubber pad (17) corresponds to the push rod (6).

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