A side milling head

Abstract

The present invention provides a side milling head, comprising a main transmission body and a side milling mechanism, wherein the main transmission body is suitable for transmitting the power of a machine tool to the side milling mechanism; the side milling mechanism comprises a mounting body and a transmission mechanism and a tool fixing device arranged on the mounting body; the tool fixing device comprises a T-shaped mounting shaft and a fixing nut, wherein the T-shaped mounting shaft passes through the mounting body and is fixed by the fixing nut; the T-shaped mounting shaft is provided with a through groove for installing a tool and a locking screw along the central axis, wherein a smooth section and a threaded section are provided in the through groove, wherein the length of the smooth section is greater than that of the threaded section, the tool is adapted to be inserted from one end of the smooth section and engage with a partial thread of the threaded section, and the locking screw is adapted to be screwed in from one end of the threaded section and abut against the end face of the tool to lock the tool. Through the solution of the present invention, installing the tool is more convenient, and the distance between the tool center and the parallel end face can be made smaller.

Description

Technical Field

[0001] The present invention relates to the technical field of angle heads, and in particular to a side milling head. Background Art

[0002] With the development of industry, the structure of mechanical products has become increasingly complex, and high processing precision is required. When machining the internal structure of some boxes or metal parts, it is often necessary to use the tool of a side milling head to penetrate deep into the box to perform processing. Existing side milling heads generally achieve the conversion of motion direction by rotating and reversing two perpendicularly meshing bevel gears. After reversing, the direction of motion is transmitted to the tool through a transmission mechanism. The tool is generally fixed in the mounting part by a clamping block. The mounting part is provided with a bearing outside. The mounting part is driven to rotate by the transmission mechanism to rotate the tool. However, due to the presence of the bearing and the mounting part, the central axis of the tool is a certain distance away from the parallel end face of the side milling head, making it impossible for the central axis of the tool to get infinitely close to the parallel end face. The distance can only be minimized. In existing tool clamping, it is usually necessary to set a clamping block or sleeve in the mounting part to clamp the tool. This requires that the inner diameter of the mounting part be further expanded to accommodate the clamping block, which results in a relatively large distance between the central axis of the tool and the parallel end face. When the distance is too large, due to the small height difference between the shell plane of some products and the surface to be processed, the parallel end faces will be supported by the shell plane, making it impossible for the tool to process the surface to be processed, which will result in the inability to process specific surfaces. Summary of the Invention

[0003] The invention discloses a side milling head with a simple structure and convenient operation, aiming to solve the problem that the distance between the existing side milling head cutter and the parallel end surface is too large.

[0004] The present invention adopts the following scheme:

[0005] The present application provides a side milling head, comprising a main transmission body and a side milling mechanism, wherein the main transmission body is suitable for transmitting the power of the machine tool to the side milling mechanism; the side milling mechanism comprises a mounting body and a transmission mechanism and a tool fixing device arranged on the mounting body; the fixed tool device comprises a T-shaped mounting shaft and a fixing nut, the T-shaped mounting shaft passes through the mounting body and is fixed by the fixing nut; the outer side surface of the T-shaped mounting shaft is provided with a first gear meshing with the transmission mechanism, and bearings are installed on both sides of the first gear; the T-shaped mounting shaft is provided with a through groove for installing a tool and a locking screw along the central axis, and a smooth section and a threaded section are provided in the through groove, the length of the smooth section being greater than the threaded section, the tool is suitable for being inserted from one end of the smooth section and meshing with the partial thread of the threaded section, and the locking screw is suitable for being screwed in from one end of the threaded section and abutting against the end face of the tool to lock the tool.

[0006] Furthermore, a mounting groove is symmetrically provided on the outer side of the T-shaped mounting shaft, and the mounting groove is suitable for connecting with a protrusion provided on the first gear.

[0007] Furthermore, the transmission mechanism includes multiple groups of transmission components arranged in a straight line, each of the transmission components includes a mounting column, and a transmission gear and an internal bearing suitable for being mounted on the smooth surface of the mounting column, wherein the internal bearing is suitable for being installed inside the transmission gear.

[0008] Furthermore, the transmission gear is provided with a middle groove, one end of the middle groove is provided with a limiting portion, and the internal gear is suitable for being placed in the middle groove and limited by the limiting portion.

[0009] Furthermore, there are two internal bearings, and the two internal bearings are arranged adjacent to each other.

[0010] Furthermore, a limiting washer is provided on a side of the internal bearing away from the limiting portion, and the limiting washer is suitable for limiting the bearing in the central groove.

[0011] Furthermore, a long groove is provided in the mounting body, the mouth of the long groove is provided at the bottom of the mounting body, and the transmission gear is suitable for being installed into the long groove from the mouth.

[0012] Furthermore, the mounting post is suitable for being inserted from one side of the mounting body, and the inserted end of the mounting post is suitable for being fixed in the mounting body; the other end of the mounting post is provided with an external thread suitable for engaging with an internal thread provided on the mounting body.

[0013] Furthermore, the main transmission body includes a main transmission shaft and a secondary transmission shaft, the main transmission shaft and the secondary transmission shaft are provided with bevel gears installed perpendicular to each other, and the secondary transmission shaft is provided with a second gear meshingly connected with the transmission gear of the transmission assembly.

[0014] Furthermore, the upper end surface of the mounting body is defined as a parallel end surface, and the distance between the central axis of the T-shaped mounting shaft and the parallel end surface on the mounting body is greater than or equal to 8 mm.

[0015] Beneficial effects:

[0016] The present invention provides a new tool fixing structure and fixing method, and installs the gear on the T-shaped mounting shaft by providing a T-shaped mounting shaft and a fixing nut. The T-shaped mounting shaft can be driven to rotate, thereby driving the tool fixed in the T-shaped mounting shaft to rotate; the tool is suitable for being inserted into the T-shaped mounting shaft from one end and partially screwed into the thread, and the other end is locked by a locking nut. This locking method does not require a sleeve clamp block, thereby reducing the distance from the tool to the parallel end face, and this method is simple to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall cross-sectional structure of a side milling head according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall appearance structure of a side milling head according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic cross-sectional structural diagram of a transmission mechanism and a tool fixing device of a side milling head according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the tool installation exploded structure of a side milling head according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic structural diagram of a T-shaped mounting shaft of a side milling head according to an embodiment of the present invention;

[0022] Figure 6 1 is a schematic cross-sectional view of a T-shaped mounting shaft of a side milling head according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the appearance structure of a mounting body of a side milling head according to an embodiment of the present invention;

[0024] Figure 8 1 is a schematic cross-sectional view of a mounting body of a side milling head according to an embodiment of the present invention;

[0025] Figure 9 This is a schematic structural diagram of a transmission gear of a side milling head according to an embodiment of the present invention;

[0026] Figure 10 This is a schematic structural diagram of a first gear of a side milling head according to an embodiment of the present invention;

[0027] Figure 11 This is a schematic structural diagram of a tool for a side milling head according to an embodiment of the present invention;

[0028] Figure 12 This is a schematic structural diagram of a locking screw of a side milling head according to an embodiment of the present invention;

[0029] Icons: main transmission body 1, outer shell 11, fixing mechanism 12, main transmission shaft 13, auxiliary transmission shaft 14, second gear 15, side milling mechanism 2, mounting body 21, long groove 211, mounting hole 212, transmission assembly 22, mounting column 221, transmission gear 222, middle groove 2221, limiting part 2222, internal bearing 223, limiting washer 224, tool fixing device 23, T-shaped mounting shaft 231, through groove 2311, smooth section 2311a, threaded section 2311b, mounting groove 2312, fixing nut 232, first gear 233, protrusion 2331, bearing part 234, tool 3, wrench position 31, locking screw 4. DETAILED DESCRIPTION

[0030] Example

[0031] Combine Figures 1 to 12 As shown, this embodiment provides a side milling head, including a main transmission body 1 and a side milling mechanism 2, wherein the main transmission body 1 is suitable for transmitting the power of the machine tool to the side milling mechanism 2; the side milling mechanism 2 includes a mounting body 21 and a transmission mechanism and a tool 3 fixing device 23 arranged on the mounting body 21; the tool 3 fixing device includes a T-shaped mounting shaft 231 and a fixing nut 232, wherein the T-shaped mounting shaft 231 passes through the mounting body 21 and is fixed by the fixing nut 232; the outer side surface of the T-shaped mounting shaft 231 is provided with a first gear 233 meshing with the transmission mechanism, and on the first gear Bearings 234 are installed on both sides of the wheel 233; the T-shaped mounting shaft 231 is provided with a through groove 2311 along the central axis for installing the tool 3 and the locking screw 4, and a smooth section 2311a and a threaded section 2311b are provided in the through groove 2311, and the length of the smooth section 2311a is greater than that of the threaded section 2311b, and the tool 3 is suitable for being inserted from one end of the smooth section 2311a and engaging with the partial thread of the threaded section 2311b, and the locking screw 4 is suitable for being screwed in from one end of the threaded section 2311b and abutting against the end face of the tool 3 to lock the tool 3.

[0032] Continue to combine Figure 1As shown, in this embodiment, the main transmission body 1 includes a main transmission shaft 13 and a secondary transmission shaft 14, and the main transmission shaft 13 and the secondary transmission shaft 14 are provided with bevel gears installed perpendicular to each other, and the secondary transmission shaft 14 is provided with a second gear 15 that is meshed and connected with the transmission gear 222 of the transmission assembly 22. Here, the main transmission shaft 13 is suitable for being connected to the main shaft of the machine tool and is fixedly installed on the main shaft, so that the main shaft drives the main transmission shaft 13 to rotate and transmit power to the secondary transmission shaft 14 at the end, and the secondary transmission shaft 14 then transmits the power to the transmission mechanism through the second gear 15. Of course, the main transmission body 1 is also provided with an outer shell 11, a fixing mechanism 12, etc. The transmission method and structure of the main transmission body 1 are conventional technologies and are not the focus of the invention of the present invention, so they are not elaborated in detail.

[0033] In this embodiment, the mounting body 21 extends parallel to the main transmission shaft 13 and is provided with a long groove 211 for mounting a transmission gear 222. The opening of the long groove 211 is located at the bottom of the mounting body 21 and is suitable for receiving the transmission gear 222. The mounting body 21 is also provided with a plurality of mounting holes 212 parallel to the secondary transmission shaft 14. The mounting holes 212 are used to insert mounting posts 221 and are provided with internal threads.

[0034] Specifically, each transmission assembly 22 includes a mounting post 221, a transmission gear 222 adapted to be sleeved on the smooth surface of the mounting post 221, and an internal bearing 223, wherein the internal bearing 223 is adapted to be installed inside the transmission gear 222. Here, the mounting post 221 is provided with a threaded section 2311b and a smooth section, wherein the smooth section is adapted to be inserted into the interior of the mounting body 21, and the threaded section 2311b is adapted to be engaged with the internal thread on the mounting hole 212, thereby fixing the mounting post 221 in the mounting body 21. Furthermore, one end of the mounting post 221 provided with the threaded section 2311b is provided with a hexagonal slot for the user to operate and rotate with a tool.

[0035] The transmission gear 222 includes external teeth with a central groove 2221 at its center. A stopper 2222 is provided at one end of the central groove 2221 near the threaded section 2311b. The internal bearing 223 is adapted to fit within the central groove 2221 and be restrained by the stopper 2222. The internal bearing 223 is sleeved onto the mounting post 221, while the transmission gear 222 is sleeved onto the internal bearing 223. Multiple transmission gears 222 are sequentially meshed and connected from the secondary transmission shaft 14 to the tool fixture 23, transmitting power to the first gear 233. Two internal bearings 223 are provided within each gear, and the internal bearings 223 are arranged adjacent to each other. This solution can effectively reduce the required internal space. During installation, first place the limiting washer 224 in the mounting hole 212 of the mounting body 21, then place the internal bearing 223 in the middle groove 2221 of the transmission gear 222, then place the transmission gear 222 with the internal bearing 223 into the appropriate position from the long groove 211, and then insert the mounting post 221 from the ear through the transmission gear 222 and the internal bearing 223, and tighten it into the mounting hole 212 to complete the installation. Here, the two internal gears are arranged adjacent to each other, so that the transmission assembly 22 can be installed from the mounting body 21 near the secondary transmission shaft 14. On the one hand, the entire mounting body 21 can be integrally formed without using a split structure, which can solve the problem of poor sealing on the assembly surface of the split structure. On the other hand, the width of the transmission gear 222 in the axial direction can also be set to be relatively small. The number of the transmission assemblies 22 here can be increased or decreased according to user needs, for example, it can be 5, 6 or more, and arranged according to the distance requirements. In this embodiment, the mounting post 221 can be directly locked into the mounting hole in the mounting body 21 on one side without requiring bilateral engagement, thereby improving installation efficiency.

[0036] like Figure 3 、 4 as well as Figures 11 to 12As shown, the tool fixing device 23 includes a T-shaped mounting shaft 231 and a fixing nut 232. The T-shaped mounting shaft 231 passes through the mounting body 21 and is fixed by the fixing nut 232. A through groove 2311 for mounting a tool 3 is provided at the middle axis of the T-shaped mounting shaft 231. The tool 3 is a milling cutter in this embodiment. A smooth section 2311a and a threaded section 2311b are provided in the through groove 2311. The length of the smooth section 2311a is greater than that of the threaded section 2311b. When the tool 3 is installed, it is inserted from the smooth section 2311a. The first end of the first gear 2311b is inserted into the first gear 2311b and partially engages with the threaded portion 2311b, completing the initial fixation. The locking screw 4 is adapted to be screwed into the first end of the threaded portion 2311b and abut against the rear end face of the tool 3 to lock the tool 3's backward movement. At this point, the tool 3 extends beyond the first gear 233 to the rear end of the first gear 233, so that during rotation, the center of gravity of the tool 3 is located at the rear end of the gear, that is, within the through slot 2311. This reduces the shear force on the middle portion of the tool 3 and provides greater stability for the entire tool 3 during rotation. When the locking screw 4 is screwed into the second end of the tool 3, it does not need to be inserted into the interior of the tool 3 to tighten the tool 3 from the inside. Instead, it directly supports the rear end face of the tool 3. Because the rotation direction of the tool 3 is different from that of the locking screw 4, when the tool 3 moves in the same direction, the tool 3 tends to continue rotating inward. At this time, the end of the tool 3 is supported by the locking screw 4, thereby limiting the tool 3's backward movement. Here, the tool 3 is threadedly secured within the T-shaped mounting shaft 231 and secured from the rear end by the locking screw 4. This solution eliminates the need for a clamp or collet to secure the tool 3. While maintaining the same distance between the tool's central axis and the parallel end faces, the tool diameter can be increased, improving machining capacity. Furthermore, it reduces machining accuracy errors caused by secondary collet positioning. Furthermore, since collets are small, they can easily be damaged when securing the tool; reducing the number of collets effectively mitigates this drawback. This solution also eliminates the need to secure the locking screw 4 within the tool 3, preventing it from damaging the threaded end of the tool 3 and thereby extending the tool's service life. In another preferred embodiment, the rear end of the locking screw 4 is provided with a user-operated operating portion for conveniently rotating the locking screw 4. In another preferred embodiment, the locking screw 4 is a headless screw with a hexagonal countersunk head at the rear end, providing a hexagonal wrench slot. The headless screw can support the tool and lock it during machining, making it easier to loosen the tool for tool replacement after machining is complete. The side of the tool 3 is also provided with a wrench position 31 for providing a wrench force point when loosening the tool.

[0037] The outer side of the T-shaped mounting shaft 231 is provided with a first gear 233 that meshes with the transmission mechanism, and bearings 234 are installed on both sides of the first gear 233. A protrusion 2331 is provided inside the first gear 233, and a mounting groove 2312 is symmetrically provided on the outer side of the T-shaped mounting shaft 231. The mounting groove 2312 is suitable for connecting with the protrusion 2331 provided on the first gear 233. The protrusion 2331 on the first gear 233 is inserted into the mounting groove 2312 from one end of the T-shaped mounting shaft 231. This solution can reduce the shaft diameter of the T-shaped mounting shaft 231, facilitating installation, thereby further reducing the distance from the central axis of the tool 3 to the parallel end faces. Here, the T-shaped mounting shaft 231 and the locking nut are used to lock the bearings at both ends and act as a seal.

[0038] In this embodiment, the parallel end surface is the upper end surface of the mounting body 21, and the distance between the central axis of the T-shaped mounting shaft 231 and the parallel end surface on the mounting body 21 is greater than or equal to 8 mm. At this distance, the diameter of the tool 3 is not too small, resulting in too low strength of the tool 3.

[0039] In the present invention, during installation, one of the bearings is first installed into the T-shaped mounting shaft 231, and then the first gear 233 is installed into the T-shaped mounting shaft 231, and the other two bearings are inserted into the other side of the first gear 233 again. Finally, the T-shaped mounting shaft 231 is placed as a whole into the appropriate position of the mounting body 21, and the T-shaped mounting shaft 231 is locked in the mounting body 21 using the fixing nut 232. Under this solution, the mounting body 21 can be formed in one piece without the need for a split design. On the other hand, the distance from the central axis of the tool 3 to the parallel end surface can be reduced as much as possible to meet the processing requirements of the low-height surface to be processed. In addition, one end of the tool 3 used in the present invention is provided with an external thread that matches the internal thread in the through groove 2311.

[0040] It should be understood that the above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0041] The above description of the drawings used in the implementation manner only shows certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without making any creative efforts.

Claims

1. A side milling head, comprising a main transmission body and a side milling mechanism, wherein the main transmission body is adapted to transmit the power of a machine tool to the side milling mechanism; characterized in that: The side milling mechanism includes a mounting body and a transmission mechanism and a tool fixing device arranged on the mounting body; The tool fixing device includes a T-shaped mounting shaft and a fixing nut, wherein the T-shaped mounting shaft passes through the mounting body and is fixed by the fixing nut; The outer side surface of the T-shaped mounting shaft is provided with a first gear meshing with the transmission mechanism, and bearings are installed on both sides of the first gear; The T-shaped mounting shaft is provided with a through groove for installing a tool and a locking screw along the central axis, and a smooth section and a threaded section are provided in the through groove. The length of the smooth section is greater than that of the threaded section. The tool is suitable for being inserted from one end of the smooth section and engaging with the partial thread of the threaded section. The locking screw is suitable for being screwed into from one end of the threaded section and abutting against the end face of the tool to lock the tool, so as to reduce the distance from the tool to the upper end face of the mounting body; the rear end of the locking screw is provided with an operating portion for user operation.

2. The side milling head according to claim 1, characterized in that: The outer side of the T-shaped mounting shaft is symmetrically provided with mounting grooves, and the mounting grooves are suitable for matching and connecting with the protrusions provided on the first gear.

3. The side milling head according to claim 1, characterized in that: The transmission mechanism includes multiple groups of transmission components arranged in a straight line, each of the transmission components includes a mounting column, and a transmission gear and an internal bearing suitable for being mounted on the smooth surface of the mounting column, wherein the internal bearing is suitable for being installed inside the transmission gear.

4. The side milling head according to claim 3, characterized in that: The transmission gear is provided with a middle groove, one end of the middle groove is provided with a limiting portion, and the internal bearing is suitable for being placed in the middle groove and limited by the limiting portion.

5. The side milling head according to claim 4, characterized in that: There are two inner bearings, and the two inner bearings are arranged adjacent to each other.

6. The side milling head according to claim 5, characterized in that: A limiting washer is provided on a side of the inner bearing away from the limiting portion, and the limiting washer is suitable for limiting the inner bearing in the middle groove.

7. The side milling head according to claim 3, characterized in that: A long groove is provided in the installation body, the mouth of the long groove is provided at the bottom of the installation body, and the transmission gear is suitable for being installed into the long groove from the mouth.

8. The side milling head according to claim 3, characterized in that: The mounting post is suitable for being inserted from one side of the mounting body, and the inserted end of the mounting post is suitable for being supported in the mounting body; the other end of the mounting post is suitable for being fixedly connected to the mounting body through a thread.

9. The side milling head according to claim 3, characterized in that: The main transmission body includes a main transmission shaft and a secondary transmission shaft. The main transmission shaft and the secondary transmission shaft are provided with bevel gears installed perpendicular to each other. The secondary transmission shaft is provided with a second gear that is meshed with the transmission gear of the transmission assembly.

10. The side milling head according to claim 1, characterized in that: The upper end surface of the mounting body is defined as a parallel end surface, and the distance between the central axis of the T-shaped mounting shaft and the parallel end surface on the mounting body is greater than or equal to 8 mm.

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