A direct drive power head turret

Abstract

The utility model discloses a direct drive type power head knife tower, including the knife tower box, install the cutterhead of the front end of knife tower box, install the back cover of the rear end surface of knife tower box, install the servo motor of back cover surface, install the support axle of the inside of knife tower box, set up the drive structure between servo motor and cutterhead, still include the direct drive motor of rotating installation in the inside of cutterhead through bearing, and the direct drive output shaft of direct drive motor front end is matched with the input shaft of installing the cutter seat rear end of cutterhead surface, the utility model discloses direct drive motor direct drive cutter seat, save intermediate transmission link, and transmission efficiency obtains the effective promotion, and power loss is obviously reduced than traditional structure, direct drive motor can realize 10000rev / min above main shaft speed, satisfies the high -speed milling demand of lightweight material such as aluminum alloy, composite material, through the built -in design of motor, the overall volume of knife tower reduces, and the floor space of complete machine reduces, and the manufacturing cost reduces.

Description

Technical Field

[0001] This utility model belongs to the field of power head turret technology, specifically relating to a direct-drive power head turret. Background Technology

[0002] In the field of machining, the turret, as a core functional component of CNC machine tools, undertakes key tasks such as tool clamping, rotation indexing, and power drive. Its performance directly affects machining efficiency, accuracy, and manufacturing cost. Traditional turrets generally adopt a structural design of external servo motor drive + bevel gear transmission. The specific technical route is as follows: the external servo motor is connected to the bevel gear set in the turret housing through a coupling or belt. The bevel gear set transmits power to the tool head indexing mechanism to realize the rotation and repositioning of the tool. At the same time, an independent transmission chain (such as a gear set or synchronous belt) is set in the turret housing to transmit power to the tool holder and drive the tool to perform cutting.

[0003] However, the aforementioned prior art has the following significant drawbacks:

[0004] 1. Long and inefficient transmission chain: The external motor needs to transmit power through multiple bevel gears or gear sets. The many transmission links lead to large energy loss, and the transmission efficiency is usually less than 75%. Especially during high-speed processing, the frictional heat and vibration generated by gear meshing will further aggravate the power loss.

[0005] 2. Limited speed and insufficient machining performance: Due to the limitations of bevel gear transmission ratio and structural strength, the spindle speed of traditional turrets is generally less than 6000 rpm, which is difficult to meet the high-speed machining requirements such as high-precision milling and drilling.

[0006] 3. Loose structure and high maintenance cost: The external motor occupies extra space, resulting in a large overall size of the turret, requiring a large space for installation and maintenance; at the same time, multi-stage transmission components (such as gears, bearings, and couplings) are prone to wear and need to be replaced regularly, significantly increasing the frequency and cost of maintenance.

[0007] 4. Rapid decrease in accuracy: The gaps and elastic deformation in the long transmission chain will accumulate on the cutter head and tool holder, resulting in a decrease in indexing accuracy and repeatability, which affects the machining quality.

[0008] Therefore, this utility model proposes a direct-drive power head turret. Utility Model Content

[0009] The purpose of this invention is to provide a direct-drive power head turret to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a direct-drive power head turret, comprising a turret housing, a cutter head mounted at the front end of the turret housing, a rear cover mounted on the rear surface of the turret housing, a servo motor mounted on the surface of the rear cover, a support shaft mounted inside the turret housing, and a drive structure disposed between the servo motor and the cutter head, and further comprising...

[0011] A direct drive motor is mounted inside the cutter head via a bearing, and the direct drive output shaft at the front end of the direct drive motor is matched with the input shaft mounted at the rear end of the tool holder on the surface of the cutter head.

[0012] And the positioning and sealing structures set between the rear cover and the turret housing.

[0013] Preferably, the drive structure includes a sun gear shaft installed inside the turret housing and connected to the output end of the servo motor, a transmission gear installed on the surface of the support shaft and meshing with the sun gear shaft, a cylinder cover movably sleeved on the surface of the support shaft from back to front, a ratchet sprocket A and a ratchet sprocket C, and a ratchet sprocket B disposed between the ratchet sprocket C and the ratchet sprocket A. The ratchet sprocket B is fixed to the turret housing with screws, and the ratchet sprocket C is fixedly connected to the cutter head.

[0014] Preferably, a tool position encoder with the same number of tool positions as the tool disc is installed on the transmission gear, a sensor shaft is fixed on the inner surface of the rear cover, and an inductive switch A aligned with one of the tool position encoders is installed on the sensor shaft.

[0015] Preferably, the surface of the rear cover is further provided with hydraulic oil port B and hydraulic oil port A, the front and rear of the ratchet plate A are sealed oil cylinders, the hydraulic oil port B leads to the front end of the ratchet plate A, and the hydraulic oil port A leads to the rear end of the ratchet plate A.

[0016] Preferably, an inductive switch B is also installed on the inner side of the turret box above the rat tooth plate A.

[0017] Preferably, the surface of the direct drive motor is provided with a tool holder guide groove corresponding to the input shaft.

[0018] Preferably, the positioning structure includes an inner insert block welded and fixed to the inner side of the rear cover and inserted into the inner side of the turret box, an inner sliding groove opened on the inner wall of the rear end of the turret box, a spring and a telescopic positioning block set in the inner sliding groove, and a positioning slot opened on the surface of the inner insert block corresponding to the telescopic positioning block. The telescopic positioning block is movably installed in the inner sliding groove by the spring, and the end of the telescopic positioning block pops out into the positioning slot.

[0019] Preferably, the sealing structure includes a rubber ring installed on the inner edge of the rear cover and a sealing groove formed on the rear surface of the turret box that matches the rubber ring.

[0020] Preferably, the rear end of the rubber ring is provided with an integrated ring seat, and the inner surface of the rear cover is provided with a seat groove corresponding to the ring seat. The rear end surface of the ring seat is provided with multiple integrated L-shaped locking blocks, and the inner wall of the seat groove is provided with multiple L-shaped locking slots corresponding to the L-shaped locking blocks. The ring seat is embedded into the seat groove, and the L-shaped locking blocks are locked into the corresponding L-shaped locking slots.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. High-efficiency transmission and reduced energy consumption: The tool holder is directly driven by a direct drive motor, eliminating intermediate transmission links, which effectively improves transmission efficiency and significantly reduces power loss compared to traditional structures.

[0023] 2. High-speed machining and performance leap: The direct drive motor can achieve a spindle speed of over 10,000 rpm, meeting the high-speed milling requirements of lightweight materials such as aluminum alloys and composite materials;

[0024] 3. Compact structure and optimized cost: The built-in motor design reduces the overall size of the turret, decreases the footprint of the entire machine, and lowers manufacturing costs; at the same time, the reduction in the number of transmission components extends the maintenance cycle.

[0025] 4. Stable precision and high reliability: The direct drive structure eliminates transmission backlash and elastic deformation, improving the indexing repeatability of the tool turret and significantly enhancing machining consistency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a cross-sectional view of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the inductive switch A and the tool encoder of this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the inductive switch B and the rat-tooth disc A of this utility model;

[0030] Figure 5 This is a partial schematic diagram of the connection point of the rat tooth plate A, rat tooth plate B and rat tooth plate C of this utility model;

[0031] Figure 6 This is a top view of the connection between the direct drive output shaft and the input shaft of this utility model;

[0032] Figure 7 This is a three-dimensional schematic diagram of the connection between the direct drive output shaft and the input shaft of this utility model;

[0033] Figure 8This is a partial sectional view of the connection between the rear cover and the turret box of this utility model;

[0034] Figure 9 This utility model Figure 8 A magnified view of a portion of region A in the middle;

[0035] In the diagram: 1. Turret housing; 101. Sealing ring groove; 102. Inner sliding groove; 103. Spring; 104. Telescopic positioning block; 2. Rear cover; 21. Inner insertion block; 211. Positioning slot; 22. Rubber ring; 23. Ring seat; 24. Seat groove; 25. L-shaped locking block; 26. L-shaped slot; 3. Support shaft; 4. Tool head; 5. Servo motor; 51. Sun gear shaft; 6. Hydraulic oil port B; 7. Hydraulic oil port A; 8. Direct drive motor; 81. Direct drive output shaft; 82. Tool holder guide groove; 9. Transmission gear; 91. Tool position encoder; 10. Cylinder head; 11. Squirrel tooth plate A; 12. Squirrel tooth plate B; 13. Squirrel tooth plate C; 14. Sensor shaft; 141. Inductive switch A; 15. Inductive switch B; 16. Tool holder; 161. Input shaft. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example 1

[0038] Please see Figures 1 to 7 This is the first embodiment of the present invention, which provides the following technical solution: a direct-drive power head turret, including a turret housing 1, a cutter head 4 installed at the front end of the turret housing 1, a rear cover 2 installed on the rear surface of the turret housing 1, a servo motor 5 installed on the surface of the rear cover 2, a support shaft 3 installed inside the turret housing 1, and a drive structure disposed between the servo motor 5 and the cutter head 4, and further including...

[0039] The direct drive motor 8 is rotatably mounted inside the cutter head 4 via bearings. The rear end of the direct drive motor 8 is connected to the support shaft 3, which supports the direct drive motor 8 and allows the direct drive motor 8 to remain stationary while the cutter head 4 rotates. The direct drive output shaft 81 at the front end of the direct drive motor 8 matches the input shaft 161 at the rear end of the tool holder 16 mounted on the surface of the cutter head 4. This allows the flat part of the input shaft 161 at the rear end of the tool holder 16 to enter the flat groove inside the direct drive output shaft 81 when the cutter head 4 rotates to change tools, thus completing the direct output of power from the direct drive motor 8 to the tool holder 16.

[0040] In this embodiment, preferably, the drive structure includes a sun gear shaft 51 installed inside the turret housing 1 and connected to the output end of the servo motor 5, a transmission gear 9 installed on the surface of the support shaft 3 and meshing with the sun gear shaft 51, a cylinder cover 10 movably sleeved on the surface of the support shaft 3 from back to front, a ratchet sprocket A11 and a ratchet sprocket C13, and a ratchet sprocket B12 disposed between the ratchet sprocket C13 and the ratchet sprocket A11. The ratchet sprocket B12 is fixed to the turret housing 1 with screws, and the ratchet sprocket C13 is fixedly connected to the cutter head 4. When actually changing the tool, the control system controls the servo motor 5 according to the programming. The sun gear shaft 51 increases the torque through the planetary reduction mechanism built into the turret housing 1 and then drives the transmission gear 9, thereby driving the cutter head 4 to rotate and change the tool.

[0041] In this embodiment, preferably, a tool position encoder 91 with the same number of tool positions as the tool disk 4 is installed on the transmission gear 9, and a sensor shaft 14 is fixed on the inner surface of the rear cover 2. An inductive switch A141 aligned with one of the tool position encoders 91 is installed on the sensor shaft 14. In order to let the control system know the current tool number, for example, if the tool disk 4 has 12 tool positions, 12 tool position encoders 91 are installed. When the tool disk 4 rotates to the target tool position, the tool position encoder 91 detects the signal and sends it to the control system to stop the rotation of the tool disk 4. The system also accurately identifies the current tool position and can accurately calculate the position to be rotated when changing tools next time, so as to realize fast automatic tool changing.

[0042] In this embodiment, preferably, the surface of the rear cover 2 is also provided with hydraulic oil port B6 and hydraulic oil port A7. The front and rear of the rat tooth plate A11 are sealed oil cylinders. Hydraulic oil port B6 leads to the front end of the rat tooth plate A11, and hydraulic oil port A7 leads to the rear end of the rat tooth plate A11. During subsequent operation, the hydraulic oil port A7 is electronically controlled to enter oil and the hydraulic oil port B6 to exit oil. The rat tooth plate A11 is then hydraulically pushed to mesh with the rat tooth plates B12 and C13, thereby locking the cutter head 4.

[0043] In this embodiment, preferably, an inductive switch B15 is also installed on the inner side of the turret box 1 above the ratchet plate A11. When the ratchet plate A11 is hydraulically pushed into place, the inductive switch B15 will send a locking completion signal to the control system to run subsequent processing operations. If the locking signal is not detected, the system will alarm and prohibit the direct drive motor 8 from starting to prevent the cutter head 4 from loosening during processing and causing other problems.

[0044] In this embodiment, preferably, the surface of the direct drive motor 8 is provided with a tool holder guide groove 82 corresponding to the input shaft 161. This ensures that when the tool head 4 rotates to change tools, the flat part of the input shaft 161 of the tool holder 16 and the flat groove of the direct drive output shaft 81 are aligned. Thus, when a tool change is needed, the tool head 4 can be rotated to quickly change tools. After the tool change is completed, the control system starts to drive the direct drive motor 8, which drives the tool holder 16 to rotate at high speed for machining. Since it is a direct drive, the transmission efficiency is greatly improved, reducing energy loss. The transmission efficiency reaches more than 95%, and the speed can reach more than 10,000 rpm. Moreover, the structure is compact and the size is small, which reduces the overall manufacturing cost and floor space. When another tool change is needed, the control system controls the direct drive motor 8 to stop rotating, the hydraulic control of the ratchet A11 to disengage the gear, and the external servo motor 5 drives the tool head 4 to change tools, so that the next machining process can be carried out.

[0045] Example 2

[0046] Please see Figures 1 to 9 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that it also includes a positioning structure and a sealing structure disposed between the rear cover 2 and the turret box 1.

[0047] Specifically, the positioning structure includes an inner insert block 21 welded and fixed to the inside of the rear cover 2 and inserted into the inside of the turret housing 1; an inner sliding groove 102 formed on the inner wall of the rear end of the turret housing 1; a spring 103 and a telescopic positioning block 104 disposed in the inner sliding groove 102; and a positioning slot 211 formed on the surface of the inner insert block 21 corresponding to the telescopic positioning block 104. The telescopic positioning block 104 is movably installed in the inner sliding groove 102 by the spring 103, and the end of the telescopic positioning block 104 pops out into the positioning slot 211, so that the rear cover 2 and When bolting the turret box 1, the rear cover 2 can be placed over the rear end of the turret box 1, so that the inner insert 21 is inserted into the inside of the turret box 1. The end of the telescopic positioning block 104 is pushed out into the positioning slot 211 by the spring 103. This can smoothly limit the inner insert 21 and the rear cover 2, ensuring that the rear cover 2 and the turret box 1 will not be displaced during the bolt connection process. This serves as an auxiliary positioning function to facilitate the bolt connection and does not affect the normal disassembly of the rear cover 2 and the turret box 1 in the future.

[0048] In this embodiment, preferably, the sealing structure includes a rubber ring 22 installed on the inner edge of the rear cover 2 and a sealing ring groove 101 opened on the rear surface of the turret box 1 that matches the rubber ring 22, so that after the rear cover 2 is subsequently locked and fixed to the turret box 1, the rubber ring 22 can be pressed to achieve a sealing effect.

[0049] In this embodiment, preferably, the rear end of the rubber ring 22 is provided with an integrated ring seat 23, and the inner surface of the rear cover 2 is provided with a seat groove 24 corresponding to the ring seat 23. The rear end surface of the ring seat 23 is provided with multiple integrated L-shaped locking blocks 25. The rubber ring 22, the ring seat 23 and the L-shaped locking blocks 25 are all made of fluororubber, which will undergo elastic deformation when squeezed. The inner wall of the seat groove 24 is provided with multiple L-shaped slots 26 corresponding to the L-shaped locking blocks 25. The ring seat 23 is embedded in the seat groove 24, and the L-shaped locking blocks 25 are locked into the corresponding L-shaped slots 26, so that the rubber ring 22 can be stably installed on the inner surface of the rear cover 2, and the rubber ring 22 will not easily fall off during the connection between the rear cover 2 and the turret box 1, avoiding unnecessary trouble.

[0050] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A direct-drive power head turret, comprising a turret housing (1), a cutter head (4) mounted on the front end of the turret housing (1), a rear cover (2) mounted on the rear end surface of the turret housing (1), a servo motor (5) mounted on the surface of the rear cover (2), a support shaft (3) mounted inside the turret housing (1), and a drive structure disposed between the servo motor (5) and the cutter head (4), characterized in that: Also includes The direct drive motor (8) is mounted inside the cutter head (4) by rotating through the bearing, and the direct drive output shaft (81) at the front end of the direct drive motor (8) is matched with the input shaft (161) at the rear end of the tool holder (16) on the surface of the cutter head (4). And a positioning structure and a sealing structure set between the rear cover (2) and the turret box (1).

2. The direct-drive power head turret according to claim 1, characterized in that: The drive structure includes a sun gear shaft (51) installed inside the turret box (1) and connected to the output end of the servo motor (5), a transmission gear (9) installed on the surface of the support shaft (3) and meshing with the sun gear shaft (51), a cylinder cover (10) movably sleeved on the surface of the support shaft (3) from back to front, a ratchet plate A (11) and a ratchet plate C (13), and a ratchet plate B (12) disposed between the ratchet plate C (13) and the ratchet plate A (11). The ratchet plate B (12) is fixed to the turret box (1) with screws, and the ratchet plate C (13) is fixedly connected to the cutter head (4).

3. The direct-drive power head turret according to claim 2, characterized in that: The transmission gear (9) is equipped with a tool position encoder (91) that is consistent with the number of tool positions on the tool disc (4). The inner surface of the rear cover (2) is fixed with a sensor shaft (14), and a sensor switch A (141) aligned with one of the tool position encoders (91) is installed on the sensor shaft (14).

4. A direct-drive power head turret according to claim 2, characterized in that: The surface of the rear cover (2) is also provided with hydraulic oil port B (6) and hydraulic oil port A (7). The front and rear of the rat tooth plate A (11) are sealed oil cylinders. The hydraulic oil port B (6) leads to the front end of the rat tooth plate A (11), and the hydraulic oil port A (7) leads to the rear end of the rat tooth plate A (11).

5. A direct-drive power head turret according to claim 3, characterized in that: An inductive switch B (15) is also installed on the inner side of the turret box (1) above the rat tooth plate A (11).

6. A direct-drive power head turret according to claim 1, characterized in that: The surface of the direct drive motor (8) is provided with a tool holder guide groove (82) corresponding to the input shaft (161).

7. A direct-drive power head turret according to claim 1, characterized in that: The positioning structure includes an inner insert block (21) welded and fixed inside the rear cover (2) and inserted into the inner side of the turret box (1), an inner slide groove (102) opened on the inner wall of the rear end of the turret box (1), a spring (103) and a telescopic positioning block (104) set in the inner slide groove (102), and a positioning slot (211) opened on the surface of the inner insert block (21) corresponding to the telescopic positioning block (104). The telescopic positioning block (104) is movably installed in the inner slide groove (102) by the spring (103), and the end of the telescopic positioning block (104) pops out into the positioning slot (211).

8. A direct-drive power head turret according to claim 1, characterized in that: The sealing structure includes a rubber ring (22) installed on the inner edge of the rear cover (2) and a sealing ring groove (101) opened on the rear surface of the turret box (1) to match the rubber ring (22).

9. A direct-drive power head turret according to claim 8, characterized in that: The rubber ring (22) has an integrated ring seat (23) at its rear end, and the inner surface of the back cover (2) has a seat groove (24) corresponding to the ring seat (23). The rear end surface of the ring seat (23) has multiple integrated L-shaped locking blocks (25), and the inner wall of the seat groove (24) has multiple L-shaped locking slots (26) corresponding to the L-shaped locking blocks (25). The ring seat (23) is embedded in the seat groove (24), and the L-shaped locking blocks (25) are locked into the corresponding L-shaped locking slots (26).

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