Indexing positioning device of numerical control rotary table

Abstract

This utility model discloses an indexing and positioning device for a CNC rotary table, relating to the field of indexing and positioning technology. It includes a housing, inside which a drive mechanism is installed. One end of the drive mechanism has a positioning part, and a pneumatic locking mechanism is arranged around the positioning part. This utility model uses a locking nut screwed onto a threaded post to prevent the bearing at the optical shaft from slipping outwards. When the threaded post is repeatedly disassembled and reassembled with the locking nut, resulting in thread damage, or when the optical shaft is repeatedly assembled and worn, the locking nut can be unscrewed from the threaded post. Then, the turbine and positioning part can be disassembled from the optical shaft and the threaded post. An Allen wrench is then used to unscrew the Allen bolts from the side locking hole and the outer locking hole. At this point, a new optical shaft with a threaded post can be used, thus facilitating the flexible disassembly of the positioning part and the drive mechanism for convenient maintenance and replacement.

Description

Technical Field

[0001] This utility model relates to the field of indexing and positioning technology, specifically to an indexing and positioning device for a CNC rotary table. Background Technology

[0002] This utility model relates to the field of indexing and positioning technology, specifically to an indexing and positioning device for a CNC rotary table. In CNC machining, the indexing and positioning of the rotary table is a crucial step, determining the angular and positional accuracy of the machined workpiece.

[0003] Traditional CNC rotary tables typically employ mechanical or hydraulic locking mechanisms for indexing and positioning. Mechanical locking suffers from unstable locking force and wear, while hydraulic locking is prone to oil leakage and high maintenance costs. These issues lead to inaccurate positioning, loosening, and even failure of traditional indexing and positioning devices during use, severely impacting machining quality and efficiency.

[0004] To address the problems in the aforementioned solutions, existing technologies have begun to explore more advanced and reliable locking methods, such as pneumatic locking. However, even with pneumatic locking, technical challenges remain, including ensuring stable clamping of the positioning unit and facilitating maintenance and replacement. Particularly after prolonged use, the positioning unit and its drive mechanism are prone to wear, leading to decreased positioning accuracy. Replacement becomes complex, increasing maintenance and time costs.

[0005] Therefore, it is necessary to design a new type of indexing and positioning device for CNC rotary tables to solve the problems of inaccurate positioning, high maintenance costs, and complex replacement operations in the existing technology. Utility Model Content

[0006] The purpose of this invention is to provide an indexing and positioning device for a CNC rotary table to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A CNC rotary table indexing and positioning device includes a housing, a drive mechanism is installed inside the housing, a positioning part is provided at one end of the drive mechanism, and a pneumatic locking mechanism is provided around the positioning part.

[0009] The drive mechanism includes a motor, which is fixedly connected to one side of the chassis. A rotating shaft is fixedly connected to the output end of the motor. A worm gear is fixedly connected to the surface of the rotating shaft. A turbine is meshed with one side of the worm gear. A fixing member is provided on the surface of the worm gear. A chassis is provided at one end of the fixing member. A locking block is engaged on the surface of the chassis. A positioning part is fixedly connected to one end of the locking block.

[0010] A further improvement of this utility model is that the fixing component includes two locking nuts, which are fixedly connected to the surface of the worm gear. A threaded post is threadedly connected to the locking nut, and an optical shaft is fixedly connected to one end of the threaded post. A locking pin is fixedly connected to one end of the optical shaft, and a protrusion is fixedly connected to the surface of the locking pin. A locking pin is fixedly connected to one end of the protrusion, and a chassis is fixedly connected to the other end of the locking nut. The motor drives the worm gear on the rotating shaft to rotate, the worm gear drives the turbine to rotate, and the turbine drives the positioning part on the fixing component to rotate.

[0011] A further improvement of this utility model is that: a side locking hole is provided on the surface of the locking post; a protrusion is fixedly connected to the surface of the locking post; an end section post is sleeved on the surface of the protrusion and the locking post; a post hole and a fixed opening are provided inside the end section post; an external locking hole is provided on the surface of the end section post; a fixed post is fixedly connected to the top of the end section post; a flat wall is provided on one side of the end section post; an internal hexagon bolt is directly threaded to the locking post; and post holes and fixed openings are provided at both ends of the end section post of the fixed post to respectively engage the locking post and the protrusion.

[0012] A further improvement of this utility model is that the pneumatic locking mechanism includes a cylinder and a base block. The base block is installed on the surface of the positioning part. Slider blocks are fixed on the left and right sides of the top surface of the base block. Guide rails are slidably connected to both sliders. Fixing blocks are fixed to both guide rails. Vertical blocks are fixed to both fixing blocks and are perpendicular to the fixing blocks. Reinforcing feet are fixed to the opposite sides of both vertical blocks. After the positioning part is positioned, the protrusions around the positioning part are placed between the inner clamping block and the outer clamping block. Then the cylinder is activated, and the cylinder drives the pushing block to move outward.

[0013] A further improvement of this utility model is that: the outer end faces of the two reinforcing feet on opposite sides are arranged in an inverted "V" shape; guide rails are fixed on the outer end faces of the two reinforcing feet; slots are opened on the two guide rails; a pushing block is provided between the two guide rails; the left and right ends of the pushing block are respectively engaged in the slots; a cylinder that drives the upward and downward movement is fixed at the base block; by utilizing the force of the two inclined guide rails, the two vertical blocks are driven to move closer to each other, so that the inner clamping block and the outer clamping block move closer to each other synchronously and clamp the positioning part.

[0014] A further improvement of this utility model is that: an inner clamping block and an outer clamping block are fixed to the top of the opposite sides of the two vertical blocks.

[0015] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0016] 1. This utility model provides an indexing and positioning device for a CNC rotary table. A locking nut is screwed onto the threaded post to prevent the bearing at the optical shaft from slipping outward. When the threaded post is repeatedly disassembled and reassembled with the locking nut, resulting in thread damage, or when the optical shaft is repeatedly assembled and worn, the locking nut can be unscrewed from the threaded post. Then, the turbine and positioning part can be disassembled from the optical shaft and the threaded post. Then, an Allen wrench can be used to unscrew the Allen bolts from the side locking hole and the outer locking hole. At this time, a new optical shaft with a threaded post can be used, which facilitates the flexible disassembly of the positioning part and the drive mechanism, making maintenance and replacement convenient.

[0017] 2. This utility model provides an indexing and positioning device for a CNC rotary table. After the positioning part is positioned, the protrusions around the positioning part are placed between the inner clamping block and the outer clamping block. Then, the cylinder is activated, and the cylinder drives the pushing block to move outward. By utilizing the component force of the two inclined guide rails, the two vertical blocks are driven to move closer to each other. Thus, the inner clamping block and the outer clamping block move closer to each other synchronously and clamp the positioning part, thereby ensuring long-term clamping of the positioning part and preventing it from loosening, and preventing positional deviation caused by vibration or external force. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the pneumatic locking mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the drive mechanism of this utility model;

[0021] Figure 4 This is a structural schematic diagram of the fastener of this utility model.

[0022] In the diagram: 1. Chassis; 2. Drive mechanism; 20. Motor; 21. Rotating shaft; 22. Worm gear; 23. Turbine; 24. Fixing component; 240. Fixing column; 241. End section column; 242. Column hole; 243. Clamping column; 244. Fixed opening; 245. Protrusion; 246. Side locking hole; 247. Flat wall; 248. External locking hole; 249. Hex socket head cap screw; 2491. Optical shaft; 2492. Threaded column head; 2493. Locking nut; 25. Chassis; 26. Clamping block; 3. Positioning part; 4. Pneumatic locking mechanism; 40. Base block; 41. Slider; 42. Guide rail; 43. Fixing block; 44. Vertical block; 45. Pushing block; 46. Cylinder; 47. Inner clamping block; 48. Outer clamping block; 49. Guide rail; 491. Reinforcing foot; 492. Slot. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to embodiments:

[0024] Example 1

[0025] like Figure 1-4 As shown, this utility model provides an indexing and positioning device for a CNC rotary table, including a housing 1, a drive mechanism 2 installed inside the housing 1, a positioning part 3 provided at one end of the drive mechanism 2, and a pneumatic locking mechanism 4 provided around the positioning part 3.

[0026] The drive mechanism 2 includes a motor 20, which is fixedly connected to one side of the housing 1. A rotating shaft 21 is fixedly connected to the output end of the motor 20. A worm gear 22 is fixedly connected to the surface of the rotating shaft 21. A turbine 23 is meshed with one side of the worm gear 22. A fixing member 24 is provided on the surface of the turbine 23. A chassis 25 is provided at one end of the fixing member 24. A locking block 26 is engaged on the surface of the chassis 25. A positioning part 3 is fixedly connected to one end of the locking block 26. The fixing member 24 includes two locking nuts 2493, which are fixedly connected to the surface of the turbine 23. A threaded post 2492 is threaded onto the locking nut 2493. A light shaft 2491 is fixedly connected to one end of the threaded post 2492. The light shaft 2491 and the light shaft 2492 are... One end of 91 is fixedly connected to a locking post 243, and a protrusion 245 is fixedly connected to the surface of the locking post 243. One end of the protrusion 245 is fixedly connected to the locking post 243. The other end of the locking nut 2493 is fixedly connected to a base 25. A side locking hole 246 is opened on the surface of the locking post 243. A protrusion 245 is fixedly connected to the surface of the locking post 243, and an end section post 241 is sleeved on the surface of the locking post 243. A post hole 242 and a fixed opening 244 are opened inside the end section post 241. An external locking hole 248 is opened on the surface of the end section post 241. A fixing post 240 is fixedly connected to the top of the end section post 241. A flat wall 247 is provided on one side of the end section post 241. An internal hex bolt 249 is directly threadedly connected to the flat wall 247 and the locking post 243.

[0027] Specifically, the motor 20 is started, which drives the worm gear 22 on the rotating shaft 21 to rotate, the worm gear 22 drives the turbine 23 to rotate, and the turbine 23 drives the positioning part 3 on the fixed part 24 to rotate.

[0028] At the end segments 241 of the fixed post 240, there are post holes 242 and fixed openings 244 to respectively engage the locking post 243 and the protrusion 245. Then, an internal hex bolt 249 is screwed into the side locking hole 246 of the locking post 243 through the external locking hole 248 at the flat wall 247. A locking nut 2493 is screwed onto the threaded post head 2492 to prevent the bearing at the optical shaft 2491 from slipping outward. When the threaded post head 2492 is repeatedly disassembled and reassembled with the locking nut 2493, the threads are damaged. Alternatively, if wear occurs at the optical axis 2491 after multiple assembly, the locking nut 2493 can be unscrewed from the threaded head 2492, and the turbine 23 and the positioning part 3 can be removed from the optical axis 2491 and the threaded head 2492. Then, use an Allen wrench to unscrew the Allen bolt 249 out of the side locking hole 246 and the outer locking hole 248. At this time, a new optical axis 2491 with a threaded head 2492 can be used, which makes it easy to flexibly disassemble the positioning part 3 and the drive mechanism 2.

[0029] Example 2

[0030] like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the pneumatic locking mechanism 4 includes a cylinder 46 and a base block 40. The base block 40 is mounted on the surface of the positioning part 3. Slider blocks 41 are fixed on the left and right sides of the top surface of the base block 40. Guide rails 42 are slidably connected to both sliders 41. Fixing blocks 43 are fixed to both guide rails 42. Vertical blocks 44 are fixed to both fixing blocks 43 and are perpendicular to the fixing blocks 43. Reinforcing bars are fixed to the opposite sides of the two vertical blocks 44. The two reinforcing feet 491 are arranged in an inverted "V" shape between their opposite outer end faces. Each of the two reinforcing feet 491 has a guide rail 49 fixed to its outer end face. Each of the two guide rails 49 has a slot 492. A push block 45 is provided between the two guide rails 49. The left and right ends of the push block 45 are respectively engaged in the slot 492. A cylinder 46 is fixed at the base block 40 to drive the push block 45 to move up and down. An inner clamping block 47 and an outer clamping block 48 are fixed at the top of the opposite sides of the two vertical blocks 44.

[0031] Specifically, after the positioning part 3 is positioned, the protrusions around the positioning part 3 are placed between the inner clamping block 47 and the outer clamping block 48. Then, the cylinder 46 is activated, and the cylinder 46 drives the pushing block 45 to move outward. By utilizing the component force of the two inclined guide rails 49, the two vertical blocks 44 are driven to move closer to each other. Thus, the inner clamping block 47 and the outer clamping block 48 move closer to each other and clamp the positioning part 3, thereby ensuring long-term clamping of the positioning part 3 and preventing it from loosening.

[0032] The working principle of the indexing and positioning device of this CNC rotary table will be explained in detail below.

[0033] like Figure 1-4As shown, the motor 20 is started, which drives the worm gear 22 on the rotating shaft 21 to rotate. The worm gear 22 drives the turbine 23 to rotate, and the turbine 23 drives the positioning part 3 on the fixing part 24 to rotate. After the positioning part 3 is positioned, the protrusions around the positioning part 3 are placed between the inner clamping block 47 and the outer clamping block 48. Then the cylinder 46 is started, which drives the pushing block 45 to move outward. By utilizing the component force of the two inclined guide rails 49, the two vertical blocks 44 are driven to move closer to each other. Thus, the inner clamping block 47 and the outer clamping block 48 move closer to each other synchronously and clamp the positioning part 3, thereby ensuring long-term clamping of the positioning part 3 and preventing it from loosening.

[0034] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A dividing head positioning device for a numerically controlled rotary table comprising a housing (1) characterised in that: The drive mechanism (2) is installed inside the chassis (1). A positioning part (3) is provided at one end of the drive mechanism (2). A pneumatic locking mechanism (4) is provided around the positioning part (3). The drive mechanism (2) includes a motor (20), which is fixedly connected to one side of the housing (1). The output end of the motor (20) is fixedly connected to a rotating shaft (21). A worm gear (22) is fixedly connected to the surface of the rotating shaft (21). A turbine (23) is meshed with one side of the worm gear (22). A fixing member (24) is provided on the surface of the turbine (23). A chassis (25) is provided at one end of the fixing member (24). A locking block (26) is snapped onto the surface of the chassis (25). A positioning part (3) is fixedly connected to one end of the locking block (26).

2. The indexing and positioning device for a CNC rotary table according to claim 1, characterized in that: The fastener (24) includes two locking nuts (2493), which are fixedly connected to the surface of the worm gear (23). A threaded stud (2492) is threaded onto the locking nut (2493). One end of the threaded stud (2492) is fixedly connected to an optical axis (2491). One end of the optical axis (2491) is fixedly connected to a locking pin (243). A protrusion (245) is fixedly connected to the surface of the locking pin (243). One end of the protrusion (245) is fixedly connected to the locking pin (243). The other end of the locking nut (2493) is fixedly connected to a chassis (25).

3. The indexing and positioning device for a CNC rotary table according to claim 2, characterized in that: The surface of the locking post (243) is provided with a side locking hole (246), and a protrusion (245) is fixedly connected to the surface of the locking post (243). An end section post (241) is sleeved on the surface of the protrusion (245) and the locking post (243). The interior of the end section post (241) is provided with a post hole (242) and a fixed opening (244). The surface of the end section post (241) is provided with an external locking hole (248). A fixing post (240) is fixedly connected to the top of the end section post (241). A flat wall (247) is provided on one side of the end section post (241). The flat wall (247) is directly threaded to the locking post (243) with an internal hexagon bolt (249).

4. The indexing and positioning device for a CNC rotary table according to claim 1, characterized in that: The pneumatic locking mechanism (4) includes a cylinder (46) and a base block (40). The base block (40) is installed on the surface of the positioning part (3). Slider blocks (41) are fixed on the left and right sides of the top surface of the base block (40). Guide rails (42) are slidably connected to the two sliders (41). Fixing blocks (43) are fixed to the two guide rails (42). Vertical blocks (44) are fixed to the two fixing blocks (43) and are perpendicular to the fixing blocks (43). Reinforcing feet (491) are fixed to the opposite sides of the two vertical blocks (44).

5. The indexing and positioning device for a CNC rotary table according to claim 4, characterized in that: The outer end faces of the two reinforcing feet (491) are arranged in an inverted "V" shape. The outer end faces of the two reinforcing feet (491) are fixed with guide rails (49). The guide rails (49) are both provided with slots (492). A push block (45) is provided between the two guide rails (49). The left and right ends of the push block (45) are respectively engaged in the slots (492). A cylinder (46) is fixed at the base block (40) to drive the push block (45) to move up and down.

6. The indexing and positioning device for a CNC rotary table according to claim 5, characterized in that: The top of each of the two vertical blocks (44) is fixed with an inner clamping block (47) and an outer clamping block (48) on opposite sides.

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