Rotary table for machine tool

Abstract

The utility model discloses a rotating table for a machine tool, which comprises a machine body and a working table which is arranged at the upper end of the machine body and rotates on the machine body, and connecting mechanisms which are respectively connected with the end parts of the working table are symmetrically arranged at two ends of the working table. The connecting mechanism comprises a rotating shaft, a connecting frame arranged at the end of the rotating shaft and a supporting seat arranged on the rotating shaft, the rotating shaft penetrates through the connecting frame and is connected with the connecting frame through an expansion sleeve, and a nut used for eliminating an axial gap between the supporting seat and the bearing is arranged on the rotating shaft. Due to the fact that the rotating shaft is connected and installed in an expansion sleeve locking mode, after the expansion sleeve is tightly held, no gap or axial sliding exists between the whole rotating shaft and the connecting frame, meanwhile, the axial gap between the bearing and the supporting base and the axial gap between all parts on the rotating shaft can be eliminated by screwing the nut, and the rotating shaft can be installed conveniently. And therefore, the problems that the worktable shakes after working for a long time, is not overturned in place and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machining centers, in particular to a rotary worktable for machine tools. Background Art

[0002] At present, when processing key holes, handle holes, drainage holes, installation holes and other holes on aluminum door and window profiles, in order to reduce the labor intensity of workers and improve the workpiece processing efficiency and workpiece processing accuracy, factories generally use aluminum profile CNC drilling and milling machines (i.e. aluminum profile CNC milling processing centers), multi-head drills, multi-station pneumatic punches and other equipment to perform drilling and milling operations.

[0003] When using an aluminum profile CNC drilling and milling machine to drill and mill aluminum profiles, in order to ensure that it can drill and mill multiple surfaces of the aluminum profile after one clamping, most existing aluminum profile CNC drilling and milling machines use a flip worktable that can rotate 90 degrees forward and backward, so that the aluminum profile CNC drilling and milling machine can drill and mill three surfaces of the clamped aluminum profile after one clamping.

[0004] However, most of the flip tables installed on existing aluminum profile CNC drilling and milling machines are connected to the reducer by direct connection or rigid connection. When the direct connection is adopted, the output shaft of the reducer needs to withstand a large torque and load during the flipping process of the flip table, and is extremely susceptible to wear; when the rigid connection is adopted, the rigid connector is extremely susceptible to bending and deformation due to the heavy load; therefore, the existing flip table connection structure is prone to deformation, loosening and other problems after a period of use, which makes the flipping angle of the flip table inaccurate and affects the processing accuracy of the workpiece. Utility Model Content

[0005] The purpose of the utility model is to provide a rotary worktable for machine tools to solve the problem that the connection structure of the turnover worktable on the existing aluminum profile CNC drilling and milling machine is easy to loosen and deform during use, so as to ensure that the worktable will not shake or fail to flip into place after long-term operation.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A rotary worktable for a machine tool comprises a body and a worktable arranged at the upper end of the body and rotating on the body, connecting mechanisms respectively connected to the ends of the worktable are symmetrically provided at both ends of the worktable, the connecting mechanism comprises a rotary shaft, a connecting frame arranged at the end of the rotary shaft and a support seat arranged on the rotary shaft, the rotary shaft passes through the connecting frame and is connected to the connecting frame by an expansion sleeve, and a nut is provided on the rotary shaft for eliminating the axial clearance between the support seat and the bearing.

[0008] Furthermore, a driving mechanism for driving the rotating shaft to rotate is provided on the fuselage.

[0009] Furthermore, the driving mechanism includes a motor arranged on the fuselage, a reducer arranged at the output end of the motor, and an output shaft disc arranged at the output end of the reducer, and the output shaft disc is connected to the rotary shaft through a diaphragm expansion sleeve coupling.

[0010] Furthermore, two nuts are provided in parallel.

[0011] Furthermore, a spacer sleeve is provided on the rotating shaft, the left end of the spacer sleeve contacts the nut on the right side, and the right end of the spacer sleeve contacts the inner ring of the bearing.

[0012] Furthermore, the nut on the left side is in contact with the diaphragm expansion sleeve coupling.

[0013] Furthermore, a sealing ring is provided between the inner hole of the support seat and the rotating shaft.

[0014] Furthermore, the workbench is provided with a plurality of tooling fixtures that can move on the workbench.

[0015] Furthermore, liftable positioning plates are provided on the fuselage at both ends of the workbench.

[0016] The beneficial effects of the utility model are:

[0017] 1. The connection mechanism of the present invention includes a rotating shaft, a connecting bracket mounted at the end of the rotating shaft, and a support seat mounted on the rotating shaft. The rotating shaft passes through the connecting bracket and is connected to the connecting bracket via an expansion sleeve. The rotating shaft is equipped with a nut for eliminating axial clearance between the support seat and the bearing. Because the rotating shaft is connected and installed using an expansion sleeve locking method, when the expansion sleeve is tightened, there is no clearance or axial slippage between the entire rotating shaft and the connecting bracket, thus preventing axial wobble after long-term operation. At the same time, the nut can be tightened to eliminate axial clearance between the bearing and the support seat, as well as axial clearance between various components on the rotating shaft, thereby ensuring that the workbench will not wobble or flip out of position after long-term operation.

[0018] 2. The utility model can flexibly move the position of each fixture to avoid the drilling and milling cutter to prevent interference, and can also flexibly move each fixture to drive the workpiece to move, so as to ensure that the servo flip CNC milling processing center can realize long material processing.

[0019] 3. The utility model can not only perform bilateral positioning on the same workpiece, but also perform unilateral positioning on two sections of workpieces at the same time, that is, it can place two workpieces at the same time for drilling and milling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the connection mechanism structure of the utility model;

[0023] Figure 3 This is a cross-sectional view of the connecting mechanism of the utility model.

[0024] In the figure: body 1, workbench 2, multi-dimensional spindle assembly 3, protective cover 4, lifting door 5, rotary shaft 6, connecting frame 7, support seat 8, expansion sleeve 9, nut 10, motor 11, reducer 12, output shaft disc 13, diaphragm expansion sleeve coupling 14, spacer 15, sealing ring 16, tool fixture 17, positioning plate 18, telescopic tool magazine 19, tool magazine telescopic door 20. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0026] like Figure 1 、 Figure 2 and Figure 3As shown, a rotary worktable for a machine tool comprises a fuselage 1 and a worktable 2 arranged at the upper end of the fuselage 1 and rotating on the fuselage 1, a multi-dimensional spindle assembly 3 is installed on the fuselage 1, the outer cover of the fuselage 1 is provided with a protective cover 4, and the front end of the protective cover 4 is provided with a lifting door 5, and a transparent window is installed on the lifting door 5 to facilitate the staff to observe the working condition of the multi-dimensional spindle assembly 3; a telescopic tool magazine 19 and a telescopic door 20 of the tool magazine are slidably installed on the fuselage 2, a transparent window is provided at the telescopic door of the tool magazine, and the telescopic tool magazine can be extended at the telescopic door of the tool magazine to facilitate the staff to observe the condition of the tool magazine, and connecting mechanisms are symmetrically provided at both ends of the worktable 2 with respective connected ends of the worktable 2, the connecting mechanism comprises a rotary shaft 6, a connecting frame 7 arranged at the end of the rotary shaft 6 and a support seat 8 arranged on the rotary shaft 6, the support seat 8 is fixed to the fuselage 1, and the rotary shaft 6 passes through the The support seat 8 is rotatably connected to the support seat 8 through a bearing. The connecting frame 7 includes a vertical part and a horizontal part. The horizontal part is connected to the end of the workbench by bolts. The rotating shaft 6 passes through the connecting frame 7 and is connected to the connecting frame 7 through an expansion sleeve 9. A groove is provided on the vertical part of the connecting frame 7. The rotating shaft 6 passes through one end of the rotating shaft 6 and penetrates into the groove. The expansion sleeve is arranged between the rotating shaft and the inner wall of the groove. The expansion sleeve includes inner and outer metal rings and a tensioning ring arranged between the inner and outer rings. The cross-sectional shape of the side wall of the tensioning ring is conical. The inner and outer metal rings are provided with axial openings. The screw passes through the tensioning ring and is connected to the vertical part of the connecting frame. When the screw is rotated, the tensioning ring will move, and the inner and outer metal rings will open inward and outward respectively, thereby realizing the fixation of the rotating shaft 6 and the connecting frame 7. This is the existing technology and will not be elaborated here. The rotating shaft 6 is provided with a nut 10 for eliminating the axial clearance between the support seat 8 and the bearing. Since the rotary shaft 6 is connected and installed by an expansion sleeve locking method, when the expansion sleeve is tightened, there is no gap or axial slippage between the entire rotary shaft 6 and the connecting frame 7, so that it will not have axial shaking after long-term work. The previous key connection method would produce gaps after long-term use; at the same time, the axial gap between the bearing and the support seat 8, as well as the axial gap between the various components on the rotary shaft can be eliminated by screwing the nut 10, thereby ensuring that the workbench will not shake or flip out of place after long-term work.

[0027] like Figure 2 and Figure 3 As shown, the body 1 is provided with a driving mechanism for driving the rotary shaft 6 to rotate.

[0028] like Figure 3 As shown, the driving mechanism includes a motor 11 arranged on the fuselage 1, a reducer 12 arranged at the output end of the motor 11, and an output shaft disc 13 arranged at the output end of the reducer 12. The output shaft disc 13 is connected to the rotating shaft 6 through a diaphragm expansion sleeve coupling 14.

[0029] like Figure 3 As shown, two nuts 10 are provided in parallel.

[0030] like Figure 3 As shown, a spacer sleeve 15 is provided on the rotating shaft 6. The left end of the spacer sleeve 15 contacts the right nut 10, and the right end of the spacer sleeve 15 contacts the inner race of the bearing. A circular protrusion is provided on the right end of the rotating shaft 6. The inner race of the right bearing contacts the left side of the circular protrusion, and the right side of the circular protrusion contacts the vertical portion of the connecting frame 7.

[0031] like Figure 3 As shown, the nut 10 on the left is in contact with the diaphragm expansion coupling 14 .

[0032] like Figure 3 As shown, a sealing ring 16 is provided between the inner hole of the support seat 8 and the rotary shaft 6 to prevent metal scraps from entering the bearing position and damaging the bearing.

[0033] like Figure 3 As shown, the workbench 2 is provided with a plurality of fixtures 17 that can move on the workbench 2. The fixtures 17 are pneumatic fixtures. The base of the fixtures 17 is slidably connected to the workbench 2 via a guide rail slider pair. The base of the fixtures 17 is provided with a motor, and the motor output shaft is provided with a gear. The workbench 2 is provided with a rack that meshes with the gear. This is prior art and will not be described in detail here. The position of each fixture 7 can be flexibly moved to avoid interference with the drill and milling cutter in the multi-dimensional spindle assembly 3. The fixtures 7 can also be flexibly moved to drive the workpiece to move, ensuring that the servo flip CNC milling machining center can achieve long material processing.

[0034] like Figure 3 As shown, the fuselage 1 is provided with liftable positioning plates 18 at both ends of the workbench 2, and the fuselage 1 is provided with a cylinder for driving the positioning plates 18 to rise and fall, so that it can not only perform bilateral positioning on the same workpiece, but also perform unilateral positioning on two sections of workpieces at the same time, that is, it can place two workpieces at the same time for drilling and milling.

[0035] In the description of the present invention, it should be noted that the terms "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. A rotary table for a machine tool, comprising a machine body (1) and a table (2) arranged at the upper end of the machine body (1) and rotating on the machine body (1), wherein connecting mechanisms are symmetrically provided at both ends of the table (2) and connected to the ends of the table (2), respectively, and characterized in that: The connecting mechanism comprises a rotary shaft (6), a connecting frame (7) arranged at the end of the rotary shaft (6), and a support seat (8) arranged on the rotary shaft (6); the rotary shaft (6) passes through the connecting frame (7) and is connected to the connecting frame (7) via an expansion sleeve (9); and a nut (10) is provided on the rotary shaft (6) for eliminating the axial clearance between the support seat (8) and the bearing.

2. A rotary table for machine tools according to claim 1, characterized in that: The machine body (1) is provided with a driving mechanism for driving the rotary shaft (6) to rotate.

3. A rotary table for a machine tool according to claim 2, characterized in that: The driving mechanism comprises a motor (11) arranged on a machine body (1), a reducer (12) arranged at the output end of the motor (11), and an output shaft disc (13) arranged at the output end of the reducer (12); the output shaft disc (13) is connected to the rotary shaft (6) via a diaphragm expansion sleeve coupling (14).

4. A rotary table for machine tools according to claim 3, characterized in that: Two nuts (10) are provided in parallel.

5. A rotary table for a machine tool according to claim 4, characterized in that: A spacer sleeve (15) is provided on the rotary shaft (6), the left end of the spacer sleeve (15) contacts the nut (10) on the right side, and the right end of the spacer sleeve (15) contacts the inner ring of the bearing; The nut (10) on the left side is in contact with the diaphragm expansion sleeve coupling (14).

6. The rotary table for a machine tool according to claim 1, wherein: A sealing ring (16) is provided between the inner hole of the support seat (8) and the rotary shaft (6).

7. The rotary table for a machine tool according to claim 1, wherein: The workbench (2) is provided with a plurality of fixtures (17) that can move on the workbench (2).

8. The rotary table for machine tools according to claim 1, wherein: Liftable positioning plates (18) are provided on the machine body (1) at both ends of the workbench (2).

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