A CNC milling machine rotary table

Abstract

A CNC milling machine rotary table includes a base, a connecting shaft, a first bearing, a second bearing, an annular turntable, a worktable, and a drive mechanism. The connecting shaft is vertically fixed to the center of the base, the second bearing is fixed to the base, the annular turntable is fixed to the second bearing, and the worktable is rotatably connected to the connecting shaft via the first bearing, with its bottom fixedly connected to the annular turntable. The outer wall of the annular turntable has continuously arranged transmission teeth. The drive mechanism includes a housing, a motor, an input gear, a gear reduction assembly, and an output gear. The housing is detachably mounted on the side of the base, the motor is horizontally mounted on the housing, the input gear is mounted on the motor's output shaft and engages with the gear reduction assembly, the gear reduction assembly is vertically arranged, and the output gear is mounted on the gear reduction assembly and engages with the transmission teeth. Compared with the prior art, the drive mechanism of this milling machine rotary table is mounted on the side of the base, facilitating maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of rotary table technology, specifically relating to a CNC milling machine rotary table. Background Technology

[0002] Existing milling machines need to machine multiple sides of the workpiece, so the milling machine's worktable is set as a rotatable rotary table. The drive unit of the existing rotary table is located in the center of the rotary table. If the drive unit fails and needs to be repaired, the internal parts such as the rotary table housing and worktable must be disassembled, which is troublesome to maintain. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a CNC milling machine rotary table.

[0004] To achieve the above objectives, this utility model discloses a CNC milling machine rotary table, including a base, a connecting shaft, a first bearing, a second bearing, an annular turntable, a worktable, and a drive mechanism; The connecting shaft is vertically fixed at the center of the base, and the inner ring of the first bearing is sleeved and fixed to the connecting shaft; The second bearing is a turntable bearing, which is sleeved on the connecting shaft and fixed on the base. The annular turntable is sleeved on the connecting shaft and mounted on the second bearing. A connecting hole is provided in the middle of the worktable, the outer ring of the first bearing is fixed in the connecting hole, and the bottom of the worktable is fixedly connected to the annular turntable. The outer wall of the annular turntable is provided with continuously arranged transmission teeth; The drive mechanism includes a housing, a motor, an input gear, a gear reduction assembly, and an output gear. The housing is detachably mounted on the side of the base. The motor is horizontally mounted on the housing. The input gear is mounted on the output shaft of the motor and engages with the gear reduction assembly. The gear reduction assembly is vertically arranged. The output gear is mounted on the gear reduction assembly and engages with the transmission teeth.

[0005] Furthermore, the base has a mounting groove on its side, and the housing is fitted into and fixed in the mounting groove.

[0006] Furthermore, the housing has connecting strips on two opposite sides, each connecting strip has a through hole, and the base has a threaded hole at the position corresponding to the through hole.

[0007] Furthermore, a protective cover is provided on the outer side of the transmission teeth.

[0008] Furthermore, the bottom surface of the workbench is provided with positioning holes; The base is provided with a positioning component, which includes a pushing device and a positioning column. The pushing device is located on the base, one end of the positioning column is installed on the pushing device, and the other end of the positioning column extends vertically upward to engage with the positioning hole.

[0009] Furthermore, the opening of the positioning hole is inclined outward to form a guide slope.

[0010] Furthermore, the positioning component also includes a spring, which cooperates with the positioning post to move the positioning post away from the positioning hole.

[0011] Furthermore, the bottom surface of the workbench is detachably connected to a retaining sleeve, and the bottom of the retaining sleeve is provided with the positioning hole.

[0012] Furthermore, the base has a compartment that extends through the side of the base, the positioning component is installed inside the compartment, the top surface of the base has an opening, and the positioning post extends out from the opening.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The worktable is rotatably connected to the connecting shaft. At the same time, it is connected to the drive mechanism installed on the side of the base through the transmission teeth on the outer wall of the annular turntable. Under working conditions, the drive mechanism drives the annular turntable to rotate, and the annular turntable drives the turntable to rotate.

[0014] The drive mechanism is installed on the side of the base, that is, on the outside of the turntable. When the drive mechanism malfunctions and needs to be repaired, the drive structure can be repaired directly without disassembling the worktable and internal structure, which facilitates maintenance.

[0015] The motor of the drive mechanism is set horizontally, while the gear reduction assembly is set vertically. In this way, the drive mechanism forms a shape that is "small in height and long in length". This fits the side of the base perfectly, especially the base with a low height. This avoids the problem of long height and design difficulty caused by setting the motor and gear reduction assembly along the height direction. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of the rotary table of a CNC milling machine as an example; Figure 2 for Figure 1 A three-dimensional exploded view of the rotary table of a CNC milling machine; Figure 3 for Figure 1 A top view of the rotary table of a CNC milling machine; Figure 4 for Figure 3 Sectional view of section AA; Figure 5for Figure 3 Sectional view of section BB; Figure 6 for Figure 1 A three-dimensional exploded view of the central drive mechanism; Base 100; Mounting slot 110; Threaded hole 120; Connecting shaft 200; First bearing 300; Second bearing 400; 500 ring turntable; 510 transmission gear; Worktable 600; connecting hole 610; ferrule 620; positioning hole 621; guide slope 622; Drive mechanism 700; housing 710; connecting bar 711; through hole 712; housing body 713; cover plate 714; motor 720; input gear 730; gear reduction assembly 740; reduction gear 741; rotating shaft 742; third bearing 743; output gear 750; 800 protective shield; Positioning component 900; positioning post 910; mounting base 920; spring 930. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] A CNC milling machine rotary table, see Figures 1-6 It includes a base 100, a connecting shaft 200, a first bearing 300, a second bearing 400, an annular turntable 500, a worktable 600, and a drive mechanism 700.

[0019] The connecting shaft 200 is vertically fixed at the center of the base 100. The inner ring of the first bearing 300 is fitted onto and fixed to the connecting shaft 200. The second bearing 400 is a turntable bearing, fitted onto the connecting shaft 200 with one ring fixed to the base 100. The annular turntable 500 is fitted onto the connecting shaft 200 and fixed to the other ring of the second bearing 400. A connecting hole 712 is provided in the middle of the worktable 600. The outer ring of the first bearing 300 is fixed inside the connecting hole 712, thereby achieving the positioning of the worktable 600. The bottom of the worktable 600 is fixedly connected to the annular turntable 500.

[0020] The annular turntable 500 has continuously arranged transmission teeth 510 on its outer side wall. The drive mechanism 700 includes a housing 710, a motor 720, an input gear 730, a gear reduction assembly 740, and an output gear 750. The housing is detachably mounted on the side of the base 100. The motor 720 is horizontally mounted on the housing. The input gear 730 is mounted on the output shaft of the motor 720 and engages with the gear reduction assembly 740. The gear reduction assembly 740 is vertically arranged. The output gear 750 is mounted on the gear reduction assembly 740 and engages with the transmission teeth 510. In operation, the motor 720 drives the input gear 730 to rotate, thereby sequentially rotating the gear reduction assembly 740, the output gear 750, and the annular turntable 500. Finally, the annular turntable 500 drives the worktable 600 to rotate.

[0021] The drive mechanism 700 is mounted on the side of the base 100, that is, on the outer side of the turntable. When the drive mechanism 700 malfunctions and needs repair, the drive structure can be repaired directly without disassembling the worktable 600 and its internal structure, simplifying repairs. The motor 720 of the drive mechanism 700 is horizontally positioned, while the gear reduction assembly 740 is vertically positioned. This results in a "small height, long length" shape for the drive mechanism 700, which perfectly fits the side of the base 100, especially the shorter base 100. This avoids the problem of a long height dimension and increased design complexity caused by having both the motor 720 and the gear reduction assembly 740 positioned along the height direction.

[0022] In this embodiment, the gear reduction assembly 740 includes two sets of reduction gears 741, a rotating shaft 742, and a third bearing 743. The reduction gears are mounted on the rotating shaft, and the rotating shaft is connected to the housing 710 through the third bearing. This is an existing reduction structure.

[0023] In this embodiment, the base 100 has a mounting groove 110 on its side, and the housing 710 is snapped into and fixed in the mounting groove 110. By providing the mounting groove 110, on the one hand, the bottom surface of the mounting groove 110 can support the housing 710 of the drive structure, and the two inner sidewalls of the mounting groove 110 can limit the housing 710 of the drive mechanism 700, improving assembly reliability. On the other hand, the drive structure is partially embedded in the mounting groove 110, and its size protruding from the side of the base 100 is small, making the structure more compact and greatly reducing interference with other mechanisms of the milling machine.

[0024] Specifically, the housing 710 has connecting strips 711 on two opposite sides, each connecting strip 711 has a through hole 712, and the base 100 has a mounting groove 110 at the position corresponding to the through hole 712. The housing 710 can be fixed to the base 100 by screws. The structure is simple and easy to disassemble and maintain.

[0025] In this embodiment, the housing 710 includes a housing body 713 and a cover plate 714. The housing body 713 has an opening on one side, through which the gear reduction assembly 740 is installed into the housing body 713. During installation, the cover plate 714 is placed over the housing body 713, so that the opening of the housing body 713 faces the mounting groove 110, and then the housing 710 is fixed to the base 100. The housing body 713 is located within the mounting groove 110, which increases the difficulty of malicious disassembly of the housing 710 and protects the drive mechanism 700.

[0026] In this embodiment, a protective cover 800 is provided on the outer side of the transmission teeth 510, which can protect the transmission teeth 510 of the annular turntable 500 and improve the service life of the annular turntable 500.

[0027] In this embodiment, the bottom surface of the worktable 600 is provided with a positioning hole 621. A positioning assembly 900 is provided on the base 100. The positioning assembly 900 includes a pushing device (such as a cylinder, not shown in the figure), a positioning pin 910, and a mounting base 920. The pushing device is mounted on the base 100, and the positioning pin 910 is slidably mounted in the mounting base 920, with one end mounted on the pushing device and the other end extending vertically upward to engage with the positioning hole 621. Under normal and operating conditions, the pushing device drives the positioning pin 910 upward, causing its top end to insert into the positioning pin 910, thereby fixing the worktable 600 and improving its stability. When the worktable 600 needs to rotate, the pushing device moves downward, and the worktable 600 rotates under the action of the drive mechanism 700. After the worktable 600 has rotated, the pushing device drives the positioning pin 910 upward, causing it to engage with the positioning hole 621.

[0028] Understandably, the number of positioning holes 621 and the number of positioning components 900 are set according to the actual rotation accuracy of the turntable. For example, if the turntable rotates 90° each time, then four positioning holes 621 and positioning components 900 are set.

[0029] To facilitate the insertion of the positioning post 910 into the positioning hole 621, the opening of the positioning hole 621 is inclined outward to form a guide slope 622.

[0030] In this embodiment, the positioning component 900 also includes a spring 930, which cooperates with the positioning post 910 to move the positioning post 910 away from the positioning hole 621. In this way, when the pushing device pushes the positioning post 910, the positioning post 910 can slowly move upward and be stably locked in the positioning hole 621.

[0031] In this embodiment, the bottom surface of the worktable 600 is detachably connected to a retaining sleeve 620 by screws, and the bottom of the retaining sleeve 620 is provided with a positioning hole 621. The retaining sleeve 620 prevents the positioning pin 910 from directly impacting the turntable, protecting the turntable and ensuring the installation accuracy of the base 100. If the retaining sleeve 620 is damaged, a new retaining sleeve 620 can be used.

[0032] In this embodiment, a compartment is provided inside the base 100, the compartment extends through the side of the base 100, the positioning component 900 is installed inside the compartment, the top surface of the base 100 is provided with an opening, and the positioning post 910 extends out from the opening.

[0033] In this embodiment, both the drive mechanism 700 and the housing are located on the front side of the base 100, which facilitates installation.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A CNC milling machine rotary table, characterized by: It includes a base, a connecting shaft, a first bearing, a second bearing, an annular turntable, a worktable, and a drive mechanism; The connecting shaft is vertically fixed at the center of the base, and the inner ring of the first bearing is fitted onto and fixed to the connecting shaft; The second bearing is a turntable bearing, which is sleeved on the connecting shaft and fixed on the base. The annular turntable is sleeved on the connecting shaft and mounted on the second bearing. The workbench is provided with a connecting hole in the middle, the outer ring of the first bearing is fixed in the connecting hole, and the bottom of the workbench is fixedly connected to the annular turntable. The outer wall of the annular turntable is provided with continuously arranged transmission teeth; The drive mechanism includes a housing, a motor, an input gear, a gear reduction assembly, and an output gear. The housing is detachably mounted on the side of the base. The motor is horizontally mounted on the housing. The input gear is mounted on the output shaft of the motor and engages with the gear reduction assembly. The gear reduction assembly is vertically arranged. The output gear is mounted on the gear reduction assembly and engages with the transmission teeth.

2. The CNC milling machine rotary table of claim 1, wherein: The base has a mounting groove on its side, and the housing is fitted into and fixed in the mounting groove.

3. The CNC milling machine rotary table of claim 2, wherein: The housing has connecting strips on two opposite sides, each connecting strip has a through hole, and the base has a threaded hole at the position corresponding to the through hole.

4. The CNC milling machine rotary table of claim 1, wherein: The outer side of the transmission gear is provided with a protective cover.

5. The CNC milling machine rotary table of claim 1, wherein: The bottom surface of the workbench is provided with positioning holes; The base is provided with a positioning component, which includes a pushing device and a positioning column. The pushing device is located on the base, one end of the positioning column is installed on the pushing device, and the other end of the positioning column extends vertically upward to engage with the positioning hole.

6. The CNC milling machine rotary table of claim 5, wherein: The opening of the positioning hole is inclined outward to form a guide slope.

7. The CNC milling machine rotary table of claim 5, wherein: The positioning component also includes a spring, which cooperates with the positioning post to move the positioning post away from the positioning hole.

8. The CNC milling machine rotary table of claim 5, wherein: The bottom surface of the workbench is detachably connected to a retaining sleeve, and the bottom of the retaining sleeve is provided with the positioning hole.

9. The CNC milling machine rotary table of claim 5, wherein: The base has a compartment that extends through the side of the base. The positioning component is installed inside the compartment. The top surface of the base has an opening from which the positioning post extends.

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