High-torque high-precision simple direct-drive rotating structure

Abstract

The utility model discloses a high-torque high-precision simple direct-drive rotating structure, which relates to the technical field of machining center turntable structures, and comprises a mandrel, and a motor and a support bearing which are arranged on the mandrel. The inclined rotation angle of the workbench is detected through the grating fixed on the grating supporting bowl, the structure is simple and reasonable, and the connection is firm; the axial direction of the supporting bearing is limited and fixed through the mandrel, the motor, the supporting bearing and the outer shell, the radial direction of the supporting bearing is limited and fixed through the mandrel and the outer shell, multi-point contact is adopted, four parts are used for fixing and limiting, stress is even, fixing is firm, and therefore the structure is simple and firm in positioning, rotation errors, caused by overturning torque, of the numerical control rotary table can be effectively reduced, and working efficiency is improved. Due to the arrangement and installation of the supporting bearing, the selection of the motor and the structure of the core shaft, the structure can provide larger torque under the same condition, and the machining capacity of the machining center is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of turntable structures of machining centers, in particular to a simple direct-drive turntable structure with high torque and high precision. Background Art

[0002] The direct-drive CNC rotary table's A-axis is the core functional component of a five-axis machining center, featuring high dynamic response, high precision, and high speed. The A-axis structure includes the spindle, motor, bearings, grating, and housing. The A-axis's torque and accuracy directly impact the workpiece's machining accuracy and capacity.

[0003] Currently, most five-axis machining centers with A-axis CNC turntables have complex structures. During the A-axis rotation and tilting process, gravity generates a tipping torque. The closer the rotation angle is to ±90°, the greater the tipping torque generated. This tipping torque can cause errors in the worktable's rotation angle, affecting the machine's machining accuracy. To ensure accuracy and minimize the impact of the tipping torque, most centers use a variety of interconnected components, resulting in a complex structure. Support bearings are often fixed in both directions, resulting in motion gaps during operation. The disadvantage is that during the A-axis rotation and tilting process, large gaps are easily generated, causing errors, affecting the stability of the machining center, and thus affecting the accuracy and machining capacity of the machining center.

[0004] Based on this, a simple direct-drive coupling structure with high torque and high precision is now provided to eliminate the disadvantages of the existing devices. Utility Model Content

[0005] The purpose of the present utility model is to provide a simple direct-drive coupling structure with high torque and high precision, so as to solve the problem in the background technology that a large gap is easily generated during the rotation and tilting of the A-axis, causing errors, affecting the stability of the machining center, and thus affecting the accuracy and machining capacity of the machining center.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A simple direct-drive coupling structure with high torque and high precision includes a core shaft, a motor and a support bearing mounted on the core shaft. The core shaft is connected to the motor via a rotor. The support bearing is fixed to an outer shell in contact with an outer ring of a pressure bearing. A rear fixed disk is connected to the outer shell. A grating support bowl is fixed to one side of the rear fixed disk. A grating is fixed to one side of the grating support bowl. A rear cover is provided at one end of the grating support bowl, and a gasket is provided at one end of the rear cover.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional solution: the inner ring of the support bearing is fixed to the outer wall of the core shaft, the outer ring of the support bearing is fixed to the inner wall of the outer shell, the left end face of the support bearing contacts the motor rotor and the end face of the outer shell, and the right end face of the support bearing contacts the end face of the core shaft and the outer ring of the pressure bearing.

[0010] In an optional solution, six gaskets are installed between the rear fixing plate and the grating support bowl.

[0011] In an optional solution: the motor adopts a large torque motor with the same volume and weight.

[0012] In an optional solution, the core shaft is directly machined from carbon steel bar stock.

[0013] In an optional solution: the core shaft is directly connected to a fixed CNC turntable.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The utility model detects the tilt and rotation angle of the workbench through the grating fixed on the grating support bowl, and has a simple and reasonable structure and a firm connection; the support bearing is axially limited and fixed by the core shaft, motor, support bearing and outer shell, and the support bearing is radially limited and fixed by the core shaft and outer shell, and adopts multi-point contact, and the four parts are fixed and limited, with uniform force and firm fixation. Therefore, the positioning of this structure is simple and firm, and can effectively reduce the rotation error of the CNC turntable caused by the overturning torque, thereby improving the processing accuracy and processing stability of the machining center. Due to the layout and installation of the support bearing, the selection of the motor and the structure of the core shaft, under the same conditions, this structure can provide greater torque and improve the processing capacity of the machining center. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present utility model.

[0017] Figure 2 It is a structural schematic diagram of the practical mandrel.

[0018] Notes on the accompanying figures: 1. core shaft; 2. motor; 3. support bearing; 4. outer ring of pressure bearing; 5. outer shell; 6. rear fixed plate; 7. grating support bowl; 8. grating; 9. rear cover; 10. gasket. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0020] In one embodiment, Figure 1-Figure 2As shown, a simple direct-drive coupling structure with high torque and high precision includes a core shaft 1, and a motor 2 and a support bearing 3 mounted on the core shaft 1. The core shaft 1 is connected to the motor 2 through a rotor, and the support bearing 3 is fixed to the outer shell 5 in contact with the pressure bearing outer ring 4. The outer shell 5 is connected to a rear fixed disk 6, and a grating support bowl 7 is fixed to one side of the rear fixed disk 6. A grating 8 is fixed to one side of the grating support bowl 7. A rear cover 9 is provided at one end of the grating support bowl 7, and a gasket 10 is provided at one end of the rear cover 9.

[0021] In one embodiment, Figure 1 As shown, the inner ring of the support bearing 3 is fixed to the outer wall of the core shaft 1, the outer ring of the support bearing 3 is fixed to the inner wall of the outer shell 5, the left end face of the support bearing 3 contacts the rotor of the motor 2 and the end face of the outer shell 5, and the right end face of the support bearing 3 contacts the end face of the core shaft 1 and the outer ring 4 of the pressure bearing. Multi-point contact is adopted, the four parts are fixed and limited, the force is evenly distributed, the fixation is reliable, the equipment gap is small, and the structure is stable.

[0022] In one embodiment, Figure 1 As shown, six gaskets 10 are installed between the rear fixing plate 6 and the grating support bowl 7 for adjusting the gap.

[0023] In one embodiment, Figure 1 As shown, motor 2 adopts a large torque motor with the same volume and weight.

[0024] In one embodiment, Figure 1 As shown, the core shaft 1 is directly processed from carbon steel bar stock, so that the core shaft 1 has a dense structure and stable performance, and adopts a thick wall structure to increase the torque.

[0025] In one embodiment, Figure 1 As shown, the core shaft 1 is directly connected to the fixed CNC turntable.

[0026] Working principle: The above embodiment discloses a simple direct-drive rotary structure with high torque and high precision, wherein, when in use, the motor 2 rotates, driving the core shaft 1 and the support bearing 3 connected to the rotor of the motor 2 to rotate, thereby causing the worktable to be tilted and rotated to reach the specified position; the grating 8 fixed on the grating support bowl 7 detects the angle of the worktable's tilt and rotation, and the structure is simple, reasonable, and firmly connected; the support bearing 3 is axially limited and fixed by the core shaft 1, the motor 2, the support bearing 3, and the outer shell 5, and the support bearing 3 is radially limited and fixed by the core shaft 1 and the outer shell 5, using multi-point contact, the four parts are fixed and limited, the force is evenly distributed, and the fixation is reliable. Therefore, the positioning of this structure is simple and reliable, and it can effectively reduce the rotation error of the CNC turntable caused by the overturning torque, improve the processing accuracy and processing stability of the machining center, and due to the layout and installation of the support bearing 3, the selection of the motor 2, and the structure of the core shaft 1, under the same conditions, this structure can provide greater torque and improve the processing capacity of the machining center.

[0027] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A simple direct-drive coupling structure with high torque and high precision, comprising a core shaft (1), a motor (2) and a support bearing (3) mounted on the core shaft (1), wherein the core shaft (1) is connected to the motor (2) via a rotor, and is characterized in that: The support bearing (3) is fixed to the outer shell (5) in contact with the outer ring of the pressure bearing (4); the outer shell (5) is connected to a rear fixed disk (6); a grating support bowl (7) is fixed to one side of the rear fixed disk (6); a grating (8) is fixed to one side of the grating support bowl (7); a rear cover (9) is provided at one end of the grating support bowl (7); and a gasket (10) is provided at one end of the rear cover (9).

2. A high-torque, high-precision, simple direct-drive coupling structure according to claim 1, characterized in that: The inner ring of the support bearing (3) is fixed to the outer wall of the core shaft (1), and the outer ring of the support bearing (3) is fixed to the inner wall of the outer shell (5). The left end face of the support bearing (3) contacts the rotor of the motor (2) and the end face of the outer shell (5), and the right end face of the support bearing (3) contacts the end face of the core shaft (1) and the outer ring of the pressure bearing (4).

3. The high-torque, high-precision, simple direct-drive coupling structure according to claim 1, characterized in that: Six gaskets (10) are installed between the rear fixed plate (6) and the grating support bowl (7).

4. The high-torque, high-precision, simple direct-drive coupling structure according to claim 1, characterized in that: The motor (2) is a large torque motor with the same volume and weight.

5. The high-torque and high-precision simple direct-drive coupling structure according to claim 1, characterized in that: The core shaft (1) is directly processed from carbon steel bar stock.

6. The high-torque and high-precision simple direct-drive coupling structure according to claim 1, characterized in that: The core shaft (1) is directly connected to a fixed numerical control turntable.

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