An internal spline groove milling device

Abstract

The utility model relates to mechanical processing technical field, concretely is a kind of inner spline keyway milling device, including shell, the inside rotation of shell is equipped with the first bevel gear shaft and second bevel gear shaft of interlocking, second bevel gear shaft is fixedly installed with tool rest and milling cutter in one end of shell outside, the side of shell close to milling cutter is equipped with the polishing assembly that can adjust with milling cutter diameter and length, transmission assembly for letting second bevel gear shaft drive polishing assembly and its opposite rotation is equipped on shell;By setting polishing assembly and transmission assembly, reached the effect of using milling cutter self power drive polishing assembly rotation, so it can directly remove the burr in groove while milling keyway, need not subsequent separate process, simultaneously, the polishing diameter of polishing assembly can adjust with rotating milling cutter diameter, so it can adapt to different groove width's keyway, the length of extension can adjust with milling cutter length, so it can adapt to different depth's keyway.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to an internal spline and keyway milling device. Background Technology

[0002] As a key connecting component in mechanical transmission systems for transmitting torque and achieving axial sliding, internal splines are widely used in high-end equipment fields such as automobiles, machine tools, steam turbines, and construction machinery. The machining accuracy of the keyway directly affects the transmission efficiency, load-bearing capacity, and service life. Currently, the mainstream machining methods for internal spline keyways include broaching, planing, and traditional milling.

[0003] A CNC milling machine accessory mechanism capable of machining internal keyways is disclosed in Chinese Patent Publication No. CN205497082U. This CNC milling machine accessory mechanism for machining internal keyways drives the driving bevel gear shaft to rotate through an elastic coupling. The driving bevel gear meshes with the driven bevel gear, causing the driven shaft to drive the straight shank vertical milling cutter to rotate. The milling cutter changes from vertical downward feed to horizontal transverse feed, thereby realizing the milling of the internal keyway of the workpiece. However, according to the internal spline keyway milling devices provided in related fields and existing technologies, existing devices can only complete the milling of the keyway and cannot simultaneously handle the burrs or flash generated after milling. The deburring process requires re-clamping the workpiece. If there is a deviation between the clamping positioning and the milling, it is easy to cause excessive or uneven grinding of the keyway edge, which will damage the dimensional accuracy after milling, especially for high-precision internal splines. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide an internal spline keyway milling device.

[0005] The objective of this utility model is achieved through the following technical solution: an internal spline keyway milling device, comprising a housing, wherein a first bevel gear shaft and a second bevel gear shaft are rotatably mounted inside the housing and mesh with each other, a tool holder is fixedly mounted at one end of the second bevel gear shaft located outside the housing, a milling cutter is fixedly mounted inside the tool holder, a grinding component is provided on the side of the housing near the milling cutter that can be adjusted according to the diameter and length of the milling cutter, the grinding component is located on the rear side of the milling cutter, and a transmission component is provided on the housing for driving the grinding component to rotate in the opposite direction to the second bevel gear shaft; the first bevel gear shaft is arranged laterally, the second bevel gear shaft is arranged longitudinally, and a coupling is fixedly mounted at the end of the first bevel gear shaft away from the second bevel gear shaft.

[0006] Preferably, the grinding assembly includes a first shaft, a rod inserted into the side of the first shaft away from the housing, and a second shaft fixedly installed at the end of the rod away from the first shaft. Two receiving grooves are symmetrically formed on the outer surface of the second shaft, and movable blocks are slidably arranged inside the two receiving grooves. Grinding components are longitudinally inserted into the two movable blocks located on the outer side of the rotation. The second shaft is provided with an adjustment assembly for controlling the opposing sliding of the two movable blocks, and the first shaft is provided with an adjustment assembly for controlling the sliding of the rod.

[0007] Preferably, the adjusting assembly includes a lead screw that is laterally rotatably mounted on the second shaft. The lead screw is a left- or right-hand threaded rod. Each of the two movable blocks is fixedly provided with an adjusting block on the side near the lead screw. The two adjusting blocks are respectively connected to the two sections of the lead screw with different directions of thread.

[0008] Preferably, the cross-sectional shape of the insertion rod is hexagonal, the first shaft body has a slot adapted to the position of the insertion rod, the adjusting member is a threaded rod, the adjusting member is rotatably connected to the first shaft body, and a knob is fixedly provided at one end of the adjusting member located outside the first shaft body.

[0009] Preferably, the transmission assembly includes a mounting shell fixedly mounted on the housing, and the first shaft and the second bevel gear shaft are both inserted with synchronous gears inside the housing, and the two synchronous gears mesh with each other.

[0010] Preferably, the top of the mounting housing is fixedly fitted with two cover plates for closing its opening.

[0011] Preferably, the grinding part has an L-shaped cross-section, and a connector is fixedly provided on the side of the grinding part near the movable block. The connector has a T-shaped cross-section, and the movable block has a matching connector groove at the position of the connector.

[0012] Beneficial effects:

[0013] This internal spline keyway milling device, by setting up a grinding component and a transmission component, achieves the effect of using the milling cutter's own power to drive the grinding component to rotate. This allows for the direct removal of burrs inside the keyway while milling, eliminating the need for a separate subsequent process. Furthermore, the grinding component and the milling cutter rotate in opposite directions, efficiently removing residual flash, micro-burrs, and work-hardened layers. The grinding diameter of the grinding component can be adjusted with the diameter of the rotating milling cutter, thus accommodating keyways of different widths. The extension length can be adjusted with the length of the milling cutter, accommodating keyways of different depths. Therefore, one device can be compatible with the machining of various specifications of internal splines. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the housing of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the cover plate of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the mounting shell of this utility model;

[0019] Figure 5 This is a structural schematic diagram of the first axis of the present invention from a first perspective;

[0020] Figure 6 This is a structural schematic diagram of the first axis of the present invention from a second perspective;

[0021] Figure 7 This is a schematic diagram of the structure of the grinding component of this utility model;

[0022] Figure 8 This is a schematic diagram of the structure of the grinding component of this utility model.

[0023] In the diagram: 1. Housing; 2. First bevel gear shaft; 3. Second bevel gear shaft; 4. Tool holder; 5. Milling cutter; 6. Grinding assembly; 601. First shaft; 602. Insert rod; 603. Second shaft; 604. Receiving groove; 605. Movable block; 6051. Insertion groove; 606. Grinding part; 6061. Insertion part; 607. Slot; 7. Transmission assembly; 701. Mounting shell; 7011. Cover plate; 702. Synchronizing gear; 8. Coupling; 9. Adjusting assembly; 901. Lead screw; 902. Adjusting block; 10. Adjusting component; 1001. Knob. Detailed Implementation

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0026] like Figures 1 to 8 As shown, an internal spline keyway milling device includes a housing 1. Inside the housing 1, a first bevel gear shaft 2 and a second bevel gear shaft 3 are rotatably mounted and mesh with each other. A tool holder 4 is fixedly mounted at one end of the second bevel gear shaft 3 located outside the housing 1. A milling cutter 5 is fixedly mounted inside the tool holder 4. A grinding assembly 6 is provided on the side of the housing 1 near the milling cutter 5, which can be adjusted according to the diameter and length of the milling cutter 5. The grinding assembly 6 is located on the rear side of the milling cutter 5. A transmission assembly 7 is provided on the housing 1 for driving the grinding assembly 6 to rotate in the opposite direction to the second bevel gear shaft 3. The first bevel gear shaft 2 is arranged laterally, and the second bevel gear shaft 3 is arranged longitudinally. A coupling 8 is fixedly mounted at the end of the first bevel gear shaft 2 away from the second bevel gear shaft 3.

[0027] like Figure 7 As shown, the grinding assembly 6 includes a first shaft 601. A rod 602 is inserted into the side of the first shaft 601 away from the housing 1. The rod 602 has a hexagonal cross-section. A slot 607 is provided on the first shaft 601 corresponding to the position of the rod 602. A second shaft 603 is fixedly installed at the end of the rod 602 away from the first shaft 601. Two symmetrical receiving grooves 604 are provided on the outer surface of the second shaft 603. Movable blocks 605 are slidably provided inside each of the two receiving grooves 604. Grinding parts 606 (with file marks identical to those on a file) are longitudinally inserted into the outer sides of each movable block 605. Figure 8 As shown, the grinding part 606 has an L-shaped cross-section. A connector 6061 is fixedly provided on the side of the grinding part 606 near the movable block 605. The connector 6061 has a T-shaped cross-section. The movable block 605 has a matching connector groove 6051 at the position corresponding to the connector 6061. Since the grinding part 606 is a consumable part, the connector 6061 and the connector groove 6051 can be used to facilitate the disassembly or installation of the grinding part 606, thereby improving the convenience of replacing the grinding part 606.

[0028] like Figure 7 and Figure 8 As shown, the second shaft 603 is provided with an adjustment assembly 9 for controlling the opposing sliding of the two movable blocks 605. The first shaft 601 is provided with an adjustment component 10 for controlling the sliding of the insertion rod 602. The adjustment component 10 is a threaded rod and is rotatably connected to the first shaft 601. A knob 1001 is fixedly provided at one end of the adjustment component 10 located outside the first shaft 601. A rotating hole (not labeled in the figure) is opened on the first shaft 601 corresponding to the position of the adjustment component 10 (i.e., the threaded rod). A damping layer (not shown in the figure) is provided on the inner wall of the rotating hole. The damping layer can provide damping for the adjustment component 10, so that the adjustment component 10 can maintain its original position when it is not necessary to rotate it. By rotating the adjustment component 10 through the knob 1001, the second shaft 603 can be controlled to slide, thereby adjusting the position of the grinding part 606 according to the length of the milling cutter 5 to adapt to keyways of different depths, so that one set of equipment can be compatible with the machining of internal splines of various specifications.

[0029] like Figure 7 and Figure 8 As shown, the adjusting assembly 9 includes a lead screw 901 that is laterally rotatably mounted on a second shaft 603. The lead screw 901 is a left- or right-hand threaded rod. Two movable blocks 605 are each fixedly equipped with an adjusting block 902 on the side near the lead screw 901. The two adjusting blocks 902 are respectively connected to the two sections of the lead screw 901 with different helical directions. The second shaft 603 has a rotating hole (not labeled in the figure) corresponding to the lead screw 901. The inner wall of the rotating hole is provided with a damping layer (not labeled in the figure). This damping layer provides damping for the lead screw 901, allowing it to maintain its original position when rotation is not required. Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, by rotating the lead screw 901, the two adjusting blocks 902 can drive the two movable blocks 605 to move closer or further apart, thereby adjusting the distance between the two grinding parts 606 according to the diameter of the milling cutter 5 to accommodate keyways of different widths.

[0030] like Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the transmission assembly 7 includes a mounting shell 701 fixedly mounted on the housing 1. Synchronous gears 702 are inserted into both the first shaft 601 and the second bevel gear shaft 3 inside the housing 1. Keyways (not labeled in the figure) are formed on the outer surfaces of both the first shaft 601 and the second bevel gear shaft 3. Key blocks (not labeled in the figure) are provided at positions corresponding to the keyways on the two synchronous gears 702. The engagement between the key blocks and the keyways allows the second bevel gear shaft 3 to drive the synchronous gears 702 on its outer surface to rotate. The two synchronous gears 702 mesh with each other, allowing the synchronous gears 702 on the outer surface of the second bevel gear shaft 3 to drive the synchronous gears 702 on the outer surface of the first shaft 601 to rotate. This allows the synchronous gears 702 on the outer surface of the first shaft 601 to drive the first shaft 601 forward. The milling cutter 5 rotates, thus enabling the grinding component 6 to be driven by its own power without the need for an additional drive motor, reducing equipment energy consumption and manufacturing costs. The mounting shell 701 has a through hole (not shown in the figure) corresponding to the position of the second bevel gear shaft 3, and a rotating hole (not shown in the figure) corresponding to the position of the first shaft 601. The first shaft 601 is connected to the rotating hole through a bearing. By using the bearing, the friction of the first shaft 601 during rotation can be reduced, thereby improving the stability of the first shaft 601 during rotation. Two cover plates 7011 are fixedly installed on the top of the mounting shell 701 to close its opening. The two cover plates 7011 have notches (not labeled in the figure) corresponding to the positions of the first shaft 601 and the second bevel gear shaft 3. The adjacent notches on the two cover plates 7011 can form a circular hole.

[0031] The work process is as follows:

[0032] S1: As Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, during machining, the coupling 8 is controlled to rotate by the power source, and then the coupling 8 controls the first bevel gear shaft 2 to rotate. At this time, by utilizing the meshing between the first bevel gear shaft 2 and the second bevel gear shaft 3, the second bevel gear shaft 3 can drive the milling cutter 5 to rotate through the tool holder 4.

[0033] S2: As Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, when the second bevel gear shaft 3 rotates, the first shaft 601 can be rotated by the two synchronous gears 702, and the first shaft 601 and the second bevel gear shaft 3 rotate in opposite directions at the same time.

[0034] S3: As Figure 7As shown, when the first shaft 601 rotates, the second shaft 603 can rotate by utilizing the cooperation between the insert rod 602 and the slot 607.

[0035] S4: As Figure 3 , Figure 4 and Figure 7 As shown, when the second shaft 603 rotates, the grinding component 606 directly removes the burrs in the groove while milling the keyway, without the need for a separate subsequent process. At the same time, the grinding component 6 and the milling cutter 5 rotate in opposite directions, which can efficiently remove the milling residue, microburrs and work-hardened layer.

[0036] S5: As Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, by rotating the lead screw 901, the two adjusting blocks 902 can drive the two movable blocks 605 to move closer or further apart, thereby adjusting the distance between the two grinding parts 606 according to the diameter of the milling cutter 5 to accommodate keyways of different widths. By rotating the adjusting part 10 through the knob 1001, the sliding of the second shaft 603 can be controlled, thereby adjusting the position of the grinding parts 606 according to the length of the milling cutter 5 to accommodate keyways of different depths, so that one device can be compatible with the machining of internal splines of various specifications.

[0037] The housing 1, the first bevel gear shaft 2, the second bevel gear shaft 3, the tool holder 4, the milling cutter 5, the damping layer, the bearing, the coupling 8, and the power source for controlling the rotation of the coupling 8 described in this application are all known technologies, therefore their specific structures and working principles are not described in detail.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A milling device for internal splines and keyways, characterized in that: The device includes a housing (1), inside which a first bevel gear shaft (2) and a second bevel gear shaft (3) are rotatably connected. A tool holder (4) is fixedly mounted at one end of the second bevel gear shaft (3) located outside the housing (1). A milling cutter (5) is fixedly mounted inside the tool holder (4). A grinding assembly (6) is provided on the side of the housing (1) near the milling cutter (5) and is adjustable according to the diameter and length of the milling cutter (5). The grinding assembly (6) is located on the rear side of the milling cutter (5). A transmission assembly (7) is provided on the housing (1) for the second bevel gear shaft (3) to drive the grinding assembly (6) to rotate in the opposite direction. The first bevel gear shaft (2) is arranged horizontally, the second bevel gear shaft (3) is arranged vertically, and a coupling (8) is fixedly installed at the end of the first bevel gear shaft (2) away from the second bevel gear shaft (3).

2. The internal spline keyway milling device according to claim 1, characterized in that: The grinding assembly (6) includes a first shaft (601), a rod (602) is inserted into the side of the first shaft (601) away from the housing (1), and a second shaft (603) is fixedly installed at the end of the rod (602) away from the first shaft (601). Two receiving grooves (604) are symmetrically opened on the outer surface of the second shaft (603). Movable blocks (605) are slidably provided inside the two receiving grooves (604). Grinding parts (606) are longitudinally inserted into the two movable blocks (605) located on the outer side of the rotation. An adjustment assembly (9) for controlling the sliding of the two movable blocks (605) in opposite directions is provided on the second shaft (603), and an adjustment component (10) for controlling the sliding of the rod (602) is provided on the first shaft (601).

3. The internal spline keyway milling device according to claim 2, characterized in that: The adjustment assembly (9) includes a lead screw (901) that is laterally rotatably mounted on the second shaft (603). The lead screw (901) is a left- or right-hand threaded rod. Each of the two movable blocks (605) is fixedly provided with an adjustment block (902) on the side near the lead screw (901). The two adjustment blocks (902) are respectively connected to the two sections of the lead screw (901) with different directions of thread.

4. The internal spline keyway milling device according to claim 2, characterized in that: The cross-section of the insertion rod (602) is hexagonal. The first shaft (601) has a slot (607) that matches the insertion rod (602). The adjusting member (10) is a threaded rod. The adjusting member (10) is rotatably connected to the first shaft (601). A knob (1001) is fixedly provided at one end of the adjusting member (10) outside the first shaft (601).

5. The internal spline and keyway milling device according to claim 2, characterized in that: The transmission assembly (7) includes a mounting shell (701) fixedly mounted on the housing (1). The first shaft (601) and the second bevel gear shaft (3) are both connected to a synchronous gear (702) inside the housing (1), and the two synchronous gears (702) mesh with each other.

6. The internal spline and keyway milling device according to claim 5, characterized in that: The top of the mounting housing (701) is fixedly fitted with two cover plates (7011) for closing its opening.

7. The internal spline keyway milling device according to claim 2, characterized in that: The grinding part (606) has an L-shaped cross-section. A connector (6061) is fixedly provided on the side of the grinding part (606) near the movable block (605). The connector (6061) has a T-shaped cross-section. The movable block (605) has a matching connector groove (6051) at the position corresponding to the connector (6061).

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