A turret assembly for a numerically controlled machine tool

Abstract

The utility model relates to machining technical field especially, more particularly to a tool tower assembly for numerical control machine tool, including box, the cutter head rotationally arranged in the one side of box and set up in the drive arrangement for driving cutter head rotation in the box, the drive arrangement includes rotationally arranged in the rotating piece and drive assembly of box, the rotating piece one end is connected with cutter head, the other end is transmission connection with drive assembly, the box is provided with the limit block, the limit block sets up the limit slot, the rotating piece is rotationally arranged in the limit slot one end away from cutter head, because the rotating piece one end is connected with cutter head, the other end extends to the limit slot in the limit block, and can rotate in the limit slot, under the limit effect of limit slot, effectively prevent the cutter head of the other end of rotating piece from the gravity effect and downward deflection, this design avoided the contact friction of cutter head bottom and box, and then reduced the abrasion, ensured that the precision of cutter head rotation and tool changing was not influenced.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a turret assembly for CNC machine tools. Background Technology

[0002] The tool turret is a key component of a CNC machine tool, used to house and automatically change cutting tools. Its design and function affect the machining efficiency and accuracy. Modern tool turrets typically feature rapid tool change functionality, enabling quick tool switching and improving production efficiency and machining flexibility. The turret structure includes a rotating body that can hold multiple tools. Through CNC system commands, it is precisely rotated to a designated position, aligning the tools with the machining area, reducing manual tool changing time and labor intensity, and achieving continuous, high-efficiency machining.

[0003] A disc turret comprises a housing and a cutter head, rotating via the rotation of the cutter head. For example, Chinese Utility Model Patent (CN215431582U) discloses an integrated cam turret for a horizontal lathe. This integrated cam turret includes a housing, a cam input shaft, an output shaft, a motor, and a cutter head. The housing has mounting holes with mutually perpendicular central axes and an output shaft cavity. Both ends of the cam input shaft are installed in the mounting holes. The motor is installed at one end of the mounting hole and drives the cam input shaft to rotate. The output shaft cavity has an opening facing the cam input shaft. The output shaft is rotatably mounted in the output shaft cavity, with one end connected to the cam input shaft and the other end coaxially connected to the cutter head. A first reinforcing rib is provided between the outer wall of the output shaft cavity and the housing. A lead screw nut seat is integrally formed on the bottom surface of the housing. Two slider mounting positions are symmetrically arranged on both sides of the lead screw nut seat. This integrated cam turret for a horizontal lathe can improve operational stability and product machining accuracy.

[0004] However, the aforementioned patented turret shares similar problems with traditional disc turrets: due to the significant weight of the cutter disc and the clearance fit between it and the housing, the bottom of the cutter disc gradually adheres to the housing under prolonged gravity. This inevitably leads to friction between the cutter disc and the housing during rotation, resulting in wear and affecting the accuracy of cutter disc rotation and tool changing. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a turret assembly for CNC machine tools.

[0006] To achieve the aforementioned objective, this utility model provides a turret assembly for a CNC machine tool, comprising a housing, a tool disc rotatably disposed on one side of the housing, and a drive device disposed within the housing for driving the tool disc to rotate. The drive device includes a rotating component rotatably disposed within the housing and a drive assembly. One end of the rotating component is connected to the tool disc, and the other end is connected to the drive assembly for transmission. A limit block is provided within the housing, and the limit block is provided with a limit groove. The end of the rotating component away from the tool disc is rotatably disposed within the limit groove.

[0007] Furthermore, the rotating component is rotatably connected to the limiting groove via a bearing.

[0008] Furthermore, a counterweight device is provided on the box body above the limiting block.

[0009] Furthermore, the counterweight device includes a locking block disposed above the limiting block, a counterweight rod movably disposed on the box body, and a counterweight plate detachably disposed on the counterweight rod. The bottom end of the counterweight rod can be inserted into the locking block, and the top end extends out of the box body. The counterweight plate is located outside the box body.

[0010] Furthermore, a limiting plate located inside the box is provided at the bottom end of the counterweight rod, and a support plate located outside the box is also provided on the counterweight rod, the support plate being used to support the counterweight plate.

[0011] Furthermore, a return spring is fitted on the counterweight rod. The return spring is located inside the box, and its bottom end is connected to the limiting plate, while its top end is connected to the inner wall of the box.

[0012] Furthermore, the counterweight rod is threadedly connected to both the limiting plate and the counterweight plate.

[0013] Furthermore, the drive assembly includes a motor mounted on the outer wall of the housing and a worm gear mechanism mounted inside the housing, wherein the motor is connected to the rotating component through the worm gear mechanism.

[0014] The technical solution provided by this utility model has at least the following technical effects: The turret assembly disclosed in this utility model drives a rotating component to rotate, which in turn drives the tool disc to rotate, thus realizing the tool changing function. Since one end of the rotating component is connected to the tool disc, and the other end extends into the limiting groove of the limiting block and can rotate within the limiting groove, the limiting groove effectively prevents the tool disc at the other end of the rotating component from shifting downwards due to gravity. This design avoids contact and friction between the bottom of the tool disc and the housing, thereby reducing wear and ensuring that the accuracy of tool disc rotation and tool changing is not affected. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0016] Figure 1 This is a schematic diagram of the turret assembly in Embodiment 1 of this utility model; Figure 2 This is a cross-sectional view of the turret assembly in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the turret assembly in Embodiment 2 of this utility model; Figure 4 This is a cross-sectional view of the turret assembly in Embodiment 2 of this utility model.

[0017] Explanation of main reference numerals: 1. Housing; 2. Cutter head; 3. Rotating component; 4. Drive device; 5. Bearing; 6. Limiting block; 7. Limiting groove; 8. Locking block; 9. Counterweight rod; 10. Counterweight plate; 11. Limiting plate; 12. Support plate; 13. Return spring. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0019] Example 1: As Figure 1 , Figure 2 As shown, this embodiment discloses a turret assembly for a CNC machine tool, including a housing 1, a tool head 2 mounted on one side of the housing 1, and a drive device 4 disposed within the housing 1 for driving the tool head 2 to rotate. The drive device 4 includes a rotating component 3 rotatably disposed within the housing 1 and a drive assembly. One end of the rotating component 3 is fixedly connected to the tool head 2 by screws, and the other end is drively connected to the drive assembly. The drive assembly includes a motor mounted on the outer wall of the housing 1 and a worm gear mechanism disposed within the housing 1. The motor is connected to the rotating component 3 through the worm gear mechanism.

[0020] The motor drives the rotating component 3 to rotate via a worm gear mechanism, which in turn drives the cutter head 2 to rotate. A limiting block 6 with a limiting groove 7 is provided inside the housing 1. The end of the rotating component 3 furthest from the cutter head 2 is rotatably positioned within the limiting groove 7 and is rotatably connected to the limiting groove 7 via a bearing 5. The rotating component 3 is driven to rotate by the drive assembly, thereby driving the cutter head 2 to rotate and achieving the tool changing function.

[0021] Since one end of the rotating component 3 is connected to the cutter head 2 and the other end extends into the limiting groove 7 of the limiting block 6, it can rotate within the limiting groove 7. The limiting function of the limiting groove 7 effectively prevents the cutter head 2 at the other end of the rotating component 3 from shifting downward due to gravity (keeping the rotating component 3 horizontal). This design avoids contact and friction between the bottom of the cutter head 2 and the housing 1, reduces wear, and ensures that the rotation of the cutter head 2 and the accuracy of tool changing are not affected.

[0022] Example 2: Figure 3 , Figure 4 To prevent excessive force on one side of the top of the limiting block 6 and avoid its deformation, this embodiment, based on embodiment 1, includes a counterweight device located above the limiting block 6 on the housing 1. In this embodiment, the counterweight device includes a locking block 8 positioned above the limiting block 6, a counterweight rod 9 movably mounted on the housing 1, and a counterweight disc 10 detachably mounted on the counterweight rod 9. The bottom end of the counterweight rod 9 can be inserted into the locking block 8, and the top end extends outside the housing 1, while the counterweight disc 10 is located outside the housing 1.

[0023] The counterweight disc 10 is placed on top of the counterweight rod 9 (the number of counterweight discs 10 can be selected according to requirements). Its gravity causes the bottom of the counterweight rod 9 to insert into the locking block 8, so that the gravity of the counterweight disc 10 acts directly on the upper surface of the limiting block 6. This design effectively avoids deformation caused by unilateral force on the inner top of the limiting block 6, and also further prevents the cutter head 2 at the other end of the rotating part 3 from shifting downward due to gravity.

[0024] In this embodiment, the bottom end of the counterweight rod 9 is provided with a limiting plate 11 located inside the housing 1, which prevents the counterweight rod 9 from detaching from the housing 1. Simultaneously, the counterweight rod 9 is also provided with a support plate 12 located outside the housing 1, which supports the counterweight plate 10. To facilitate the disassembly of the housing 1, a return spring 13 is fitted onto the counterweight rod 9 (the weight of the counterweight plate 10 is much greater than the elastic force of the return spring 13). This return spring 13 is located inside the housing 1, with its bottom end connected to the limiting plate 11 and its top end connected to the inner wall of the housing 1. When the counterweight plate 10 is removed from the counterweight rod 9, under the elastic force of the return spring 13, the counterweight rod 9 automatically pops out from the locking block 8 (the elastic force of the return spring 13 is greater than the weight of the counterweight rod 9 itself), facilitating the installation and disassembly of the housing 1. To ensure a secure connection between the counterweight plate 10 and the counterweight rod 9, and to allow for the disassembly and assembly of the counterweight rod 9 and the limiting plate 11, the counterweight rod 9, the limiting plate 11, and the counterweight plate 10 are all connected by threads. Specifically, threaded structures are provided at the top and bottom of the counterweight rod 9 to facilitate a secure connection between the counterweight plate 10 and the counterweight rod 9, and the counterweight rod 9 can be disassembled and assembled with the limiting plate 11 by rotating the counterweight rod 9.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A turret assembly for a CNC machine tool, comprising a housing (1), a tool head (2) rotatably disposed on one side of the housing (1), and a drive device (4) disposed within the housing (1) for driving the tool head (2) to rotate, characterized in that, The drive device (4) includes a rotating part (3) rotatably disposed in the housing (1) and a drive assembly. One end of the rotating part (3) is connected to the cutter head (2), and the other end is connected to the drive assembly. A limit block (6) is provided in the housing (1), and a limit groove (7) is provided in the limit block (6). The end of the rotating part (3) away from the cutter head (2) is rotatably disposed in the limit groove (7).

2. The tool turret assembly for a CNC machine tool according to claim 1, characterized in that, The rotating component (3) is rotatably connected to the limiting groove (7) via a bearing (5).

3. The tool turret assembly for a CNC machine tool as claimed in claim 1, wherein, A counterweight device is provided on the box (1) above the limiting block (6).

4. The tool turret assembly for a CNC machine tool according to claim 3, characterized in that, The counterweight device includes a locking block (8) set above the limiting block (6), a counterweight rod (9) movably set on the box (1), and a counterweight plate (10) detachably set on the counterweight rod (9). The bottom end of the counterweight rod (9) can be inserted into the locking block (8), and the top end extends to the outside of the box (1). The counterweight plate (10) is located outside the box (1).

5. The tool turret assembly for a CNC machine tool according to claim 4, characterized in that, The bottom end of the counterweight rod (9) is provided with a limiting plate (11) located inside the box (1), and the counterweight rod (9) is also provided with a support plate (12) located outside the box (1). The support plate (12) is used to support the counterweight plate (10).

6. The tool turret assembly for a CNC machine tool of claim 5, wherein, A return spring (13) is fitted on the counterweight rod (9). The return spring (13) is located inside the box (1), and the bottom end of the return spring (13) is connected to the limiting plate (11), and the top end is connected to the inner wall of the box (1).

7. The tool turret assembly for a CNC machine tool according to claim 6, characterized in that, The counterweight rod (9) is threadedly connected to the limiting plate (11) and the counterweight plate (10).

8. The turret assembly for CNC machine tools according to claim 1, characterized in that, The drive assembly includes a motor mounted on the outer wall of the housing (1) and a worm gear mechanism mounted inside the housing (1). The motor is connected to the rotating component (3) through the worm gear mechanism.

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