Large-aperture four-axis turntable of numerical control center

Abstract

The utility model relates to the field of numerical control center tool equipment, in particular to a large-aperture four-shaft rotary table of a numerical control center, which comprises a rotary tower, the rotary tower is fixedly arranged on an inner ring of a rotary table bearing, an outer ring of the rotary table bearing is fixedly arranged on a box body, a single-rod bearing is arranged on the rotary tower, the single-rod bearing is embedded in a spiral groove of a shaft of a cam, and the single-rod bearing is fixedly arranged on the box body. The cam is connected with a driven gear through an expansion sleeve, the driven gear is meshed with a driving gear, and the driving gear is driven by a motor; an air cylinder shell is fixedly installed on the rotating tower, an air cylinder piston is arranged in an inner cavity of the air cylinder shell, a brake pad is installed between the air cylinder piston and the box body, and the brake pad is fixed to a step of the rotating tower. According to the utility model, the inner hole of the dial can be consistent with the inner hole of the rotary table bearing, the diameter of the through hole of the four-axis rotary table is increased, the trafficability of a processed part is improved, and the size range of the processed part is expanded.

Description

Technical Field

[0001] This utility model relates to the field of CNC center tooling equipment technology, and in particular to a large-diameter four-axis rotary table for CNC centers. Background Technology

[0002] A CNC machining center is a high-efficiency automated machine tool composed of mechanical equipment and a CNC system, suitable for machining complex parts. It is one of the world's most produced and widely used CNC machine tools. It boasts strong comprehensive machining capabilities, completing a significant amount of machining in a single setup with high precision. For batches of workpieces with moderate machining difficulty, its efficiency is 5 to 10 times that of ordinary equipment. In particular, it can perform many machining operations that ordinary equipment cannot, making it especially suitable for single-piece machining or small-batch, multi-variety production with complex shapes and high precision requirements. It integrates milling, boring, drilling, tapping, and thread cutting functions into a single machine, enabling it to perform multiple processing methods.

[0003] The existing four-axis rotary table of the CNC center has a small through hole in the middle, which can only process workpieces with small diameters, and cannot process workpieces with large diameters. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a large-diameter four-axis rotary table for CNC centers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A large-diameter four-axis rotary table for a CNC center includes a turret, which is fixedly mounted on the inner ring of a rotary table bearing, and the outer ring of the rotary table bearing is fixedly mounted on a housing. A single-rod bearing is mounted on the turret and is embedded in a helical groove of a cam shaft. The cam is connected to a driven gear through a shrink sleeve, and the driven gear meshes with a driving gear, which is driven by a motor.

[0007] A cylinder housing is installed and fixed on the turret, and a cylinder piston is provided inside the cylinder housing. A brake pad is installed between the cylinder piston and the housing, and the brake pad is fixed on the step of the turret.

[0008] Preferably, the drive gear is connected to the motor shaft via an optical shaft fixing ring, and the motor drives the drive gear to rotate.

[0009] Preferably, the cylinder housing, which is fitted onto the turret, is fixed to the housing with screws on one side of the turret.

[0010] Preferably, the cylinder piston is floatingly sleeved in the inner cavity of the cylinder housing, and the cylinder piston is pushed by gas or oil pressure.

[0011] Preferably, when the gas or oil pressure pushes the cylinder piston, the cylinder piston presses the brake pads against the housing to stop the turret of the inner ring of the turntable bearing.

[0012] The beneficial effects of this utility model are as follows:

[0013] Unlike traditional four-axis rotary table structures, this utility model has a dial directly connected to the inner ring of the rotary table bearing, and the turret is also directly connected to the rotary table bearing. The inner hole of the rotary table bearing no longer needs bearing pads or other parts to connect the turrets and dials on both sides. The inner hole of the dial can be made to match the inner hole of the rotary table bearing, which increases the diameter of the through hole of the four-axis rotary table, increases the passability of the machined parts, and expands the size range of the machined parts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a large-diameter four-axis rotary table for a CNC center proposed in this utility model;

[0015] Figure 2 for Figure 1 Sectional view of AA;

[0016] Figure 3 for Figure 2 A sectional view of CC.

[0017] In the diagram: 1. Single rod bearing; 2. Drive gear; 3. Motor; 4. Optical shaft retaining ring; 5. Expansion sleeve; 6. Driven gear; 7. Cam; 8. Turret; 9. Dial; 10. Turntable bearing; 11. Housing; 12. Brake pad; 13. Cylinder housing; 14. Cylinder piston. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-3 A large-diameter four-axis rotary table for a CNC center includes a turret 8, which is fixedly mounted on the inner ring of a rotary table bearing 10, and the outer ring of the rotary table bearing 10 is fixedly mounted on a housing 11. A single rod bearing 1 is mounted on the turret 11, and the single rod bearing 1 is embedded in the helical groove of the shaft of a cam 7. The cam 7 is connected to a driven gear 6 through a shrink sleeve 5, and the driven gear 6 meshes with a driving gear 2. The driving gear 2 is driven by a motor 3.

[0020] A cylinder housing 13 is installed and fixed on the turret 8, and a cylinder piston 14 is provided in the inner cavity of the cylinder housing 13. A brake pad 12 is installed between the cylinder piston 14 and the housing 11, and the brake pad 12 is fixed on the step of the turret 8.

[0021] Among them, the drive gear 2 is connected to the shaft of the motor 3 through the optical axis fixing ring 4, and the motor 3 drives the drive gear 2 to rotate.

[0022] On one side of the turret 8, the cylinder housing 13, which is fitted onto the turret 8, is fixed to the housing 11 with screws.

[0023] The cylinder piston 14 is floatingly sleeved in the inner cavity of the cylinder housing 13, and the cylinder piston 14 is pushed by gas or oil pressure. When the gas or oil pressure pushes the cylinder piston 14, the cylinder piston 14 presses the brake pad 12 to fit tightly against the housing 11, stopping the turret 8 of the inner ring of the turntable bearing 10.

[0024] In this embodiment, the driving gear 2 is connected to the motor 3 shaft via the optical axis fixing ring 4. The motor 3 drives the driving gear 2 to rotate. The driven gear 6, which meshes with the driving gear 2, is connected to the cam 7 shaft via the expansion sleeve 5 to achieve rotational movement. A single-rod bearing 1 is installed on the turret 8. The single-rod bearing 1 is embedded in the helical groove of the cam 7 shaft. When the cam 7 is driven to rotate by the motor gear, it will drive the single-rod bearing 1 to achieve the rotational movement of the turret 8.

[0025] The outer ring of the rotary bearing 10 is fixed to the housing 11. On the right side of the rotary bearing 10, a dial 9 is fixed to the inner ring of the rotary bearing 10. On the left side of the inner ring of the rotary bearing 10, a turret 8 is connected by screws. On the left side of the turret 8, a cylinder housing 13, fitted onto the turret 8, is fixed to the housing 11 by screws. A cylinder piston 14 floats within the cylinder housing 13. A brake pad 12 is installed between the cylinder piston 14 and the housing 11, and the brake pad 12 is fixed to the step of the turret 8. All components connected to the inner ring of the rotary bearing 10 can rotate freely. When gas or oil pressure pushes the cylinder piston 14, the cylinder piston 14 presses the right brake pad 12 tightly against the housing 11, stopping the rotating components from rotating.

[0026] This structure involves a large-diameter structure. Unlike traditional four-axis rotary table structures, its dial is directly connected to the inner ring of the rotary table bearing, and the turret is also directly connected to the rotary table bearing. The inner hole of the rotary table bearing no longer needs bearing pads or other parts to connect the turrets and dial on both sides. The inner hole of the dial can be made to match the inner hole of the rotary table bearing, which increases the diameter of the through hole of the four-axis rotary table, increases the passability of the machined parts, and expands the size range of the machined parts.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A large aperture four-axis rotary table of a CNC center comprising a turret (8), characterized in that, The turret (8) is fixedly installed on the inner ring of the rotary table bearing (10), the outer ring of the rotary table bearing (10) is fixedly installed on the box (11), and the single-rod bearing (1) is installed on the turret (8), the single-rod bearing (1) is embedded in the spiral groove of the shaft of the cam (7), the cam (7) is connected with the driven gear (6) through the expansion sleeve (5), the driven gear (6) is engaged with the driving gear (2), and the driving gear (2) is driven by the motor (3); The cylinder shell (13) is fixedly installed on the turret (8), the inner cavity of the cylinder shell (13) is provided with the cylinder piston (14), and the brake pad (12) is installed between the cylinder piston (14) and the box (11), and the brake pad (12) is fixed on the step of the turret (8).

2. A large aperture four-axis rotary table for a CNC center according to claim 1, characterized in that, The driving gear (2) is connected with the shaft of the motor (3) through the optical axis fixing ring (4), and the motor (3) drives the driving gear (2) to rotate.

3. A large aperture four-axis rotary table for a CNC center according to claim 1, characterized in that, The cylinder shell (13) sleeved on the turret (8) is fixed on the box (11) by screws on one side of the turret (8).

4. A large aperture four-axis rotary table for a CNC center according to claim 1, characterized in that, The cylinder piston (14) is floatingly sleeved in the inner cavity of the cylinder shell (13), and the cylinder piston (14) is pushed by gas or oil pressure.

5. A large bore four-axis rotary table for a CNC center according to claim 4, characterized in that, When the cylinder piston (14) is pushed by gas or oil pressure, the cylinder piston (14) presses the brake pad (12) to tightly adhere to the box (11), and the turret (8) of the inner ring of the rotary table bearing (10) is stopped.

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