Single-drive cradle

Abstract

The invention discloses a single-drive cradle, and relates to the technical field of numerical control machine tools, the single-drive cradle comprises a power drive bin, a power cavity is formed in the power drive bin, a first drive part is mounted in the power cavity, a first drive shaft is fixed on the first drive part, a supporting swing seat is rotatably connected to the first drive shaft, the supporting swing seat is of a U-shaped structure, and the middle part of the supporting swing seat is sunken downwards; the two sides of the supporting swing seat extend upwards, rotating supports are arranged at the two ends of the supporting swing seat, the supporting swing seat is rotationally connected to the rotating supports, a protection cover is installed below the supporting swing seat, a driving installation cavity is formed in the supporting swing seat, a second driving piece is installed in the driving installation cavity, and a second driving shaft is fixed to the end, away from the protection cover, of the second driving piece. And the second driving shaft is rotationally connected with an index plate. The shape and position precision deviation of the machined part is reduced, the use integrity of the machined part is ensured, and the machining precision of the workpiece is improved.

Description

Technical Field

[0001] This application relates to the field of CNC machine tools, and in particular to a single-drive cradle. Background Technology

[0002] The cradle turntable is a core functional component of CNC machine tools for multi-position machining of workpieces. Through the coordinated work of two drive devices, the cradle turntable enables the workpiece to rotate and tilt in multiple dimensions. The first drive device realizes the rotation of the workpiece, and the second drive device realizes the oscillation of the workpiece, allowing the cutting tool to machine the workpiece from different angles, thus realizing the machining of complex curved surfaces and irregularly shaped parts.

[0003] In the prior art, a cradle turntable includes a first driving component, a first driving shaft fixed on the first driving component, a rectangular swing base rotatably connected to the first driving shaft, a driving component cavity opened inside the rectangular swing base, a second driving component installed in the driving component cavity, a second rotating shaft fixed on the second driving component, and an indexing plate rotatably connected to the second rotating shaft. The indexing plate serves as a workpiece support platform for placing the workpiece to be processed.

[0004] Regarding the aforementioned existing technology, the rectangular swing base is concentric with the drive shaft axis. Since the rectangular swing base has a certain thickness and requires the installation of components such as the second drive component inside, the rectangular swing base has a large thickness. At this time, the top of the indexing plate is much higher than the axis of the first drive component. When the product is placed on the indexing plate, the center of the product is much higher than the axis of the first drive shaft. When the first drive component rotates, it will cause the top of the product to move a large distance, affecting the processing accuracy of the product, which needs to be improved. Summary of the Invention

[0005] In order to reduce the deviation in the dimensional and positional accuracy of machined parts, ensure the integrity of the machined parts, and improve the machining accuracy of the workpiece, this application proposes a single-drive cradle structure.

[0006] The single-drive cradle provided in this application adopts the following technical solution: The device includes a power drive compartment with a power cavity formed inside. A first drive component is installed inside the power cavity, and a first drive shaft is fixed to the first drive component. A support swing seat is rotatably connected to the first drive shaft. The support swing seat has a U-shaped structure, with a downward-concave middle and upward-extending sides. Rotating supports are provided at both ends of the support swing seat, and the support swing seat is rotatably connected to the rotating supports. A protective cover is installed below the support swing seat. A drive mounting cavity is opened inside the support swing seat, and a second drive component is installed inside the drive mounting cavity. A second drive shaft is fixed to the end of the second drive component away from the protective cover, and an indexing plate is rotatably connected to the second drive shaft.

[0007] By adopting the above technical solution, when machining parts, the workpiece is first placed on the indexing plate and fixed. After the workpiece is fixed, the first and second driving components are activated. Simultaneously, the first and second rotating shafts rotate: the first rotating shaft drives the supporting swing arm to rotate, and the swing amplitude of the supporting swing arm can be set through machining programming; the second rotating shaft drives the indexing plate to rotate, and the rotation speed of the indexing plate can also be set through machining programming, thereby controlling the final machining accuracy of the workpiece. Because the supporting swing arm has a U-shaped structure, with its central part concave downwards and both sides extending upwards, the center of the workpiece and the center of the driving shaft remain coaxial, significantly reducing the positioning accuracy required during part machining.

[0008] Preferably, a second support block is integrally formed on the side of the support base near the indexing plate, and a limit bearing is assembled between the second support block and the second drive shaft. The limit bearing is used to support the indexing plate.

[0009] By adopting the above technical solution, the limit bearing can achieve bidirectional axial and radial limit of the second drive shaft. By suppressing the axial movement and radial runout of the shaft, the motion stability of the second drive shaft is effectively guaranteed, and the accuracy deviation caused by shaft displacement and shaking is avoided. The second support block provides auxiliary support for the indexing plate, thereby further improving the overall stability and rotational motion accuracy of the indexing plate during rotation.

[0010] Preferably, a plurality of first support blocks are evenly spaced on the side of the drive mounting cavity near the power drive compartment, and each first support block has a central hole at its center, through which internal cables pass.

[0011] By adopting the above technical solution, the hollow design of the first support block can significantly reduce the overall weight of the support base, reduce the rotational inertia when the support base swings, reduce the power loss and load pressure of the first drive component, improve the motion response speed and start-stop accuracy of the first rotating shaft, and allow the motor cable in the drive mounting cavity to be threaded through the hollow part of the first support block, making the wiring more neat.

[0012] Preferably, the protective cover has multiple circular countersunk holes on its outer side, and the bottom of the support base has a threaded groove corresponding to the circular countersunk holes. The protective cover and the support base are fastened together by bolts that pass through the circular countersunk holes and are screwed into the threaded grooves. The bottom of the protective cover has an involute slope that is inclined downwards.

[0013] By adopting the above technical solution, the threaded groove enables precise positioning and rapid assembly of bolts. The connection method between the bolt and the threaded groove facilitates the disassembly of the protective cover, thereby simplifying the maintenance and upkeep of the second drive component and the wiring inside the drive mounting cavity. The downward tilt of the involute slope better avoids other structures, improving the ease of use of the support base.

[0014] Preferably, the indexing plate has multiple T-shaped grooves, and each T-shaped groove has multiple circular holes on its periphery.

[0015] By adopting the above technical solution, the T-slot on the indexing plate can achieve precise positioning and locking of the workpiece to be clamped. The circular hole can effectively reduce the overall weight of the indexing plate and adapt to the installation requirements of various auxiliary fasteners, greatly improving the workpiece clamping stability and the structural practicality of the indexing plate.

[0016] Preferably, the limiting bearing is provided with an adjusting ring, the bottom of the adjusting ring is fixed to the second drive shaft, the adjusting ring is internally threaded to an adjusting column, the top of the adjusting column is used to support the indexing plate, and the indexing plate is provided with a limiting component that locks the indexing plate and the adjusting ring relative to each other.

[0017] By adopting the above technical solution, the height of the indexing plate can be adjusted by the threaded engagement of the adjusting ring and the adjusting column during use. Depending on the height of different products, the center of the product to be processed can be better aligned with the center of the first driving component. When making micro-adjustments, the entire device can be adjusted more precisely, improving the accuracy of the cradle adjustment control and ensuring the accuracy of the cradle.

[0018] Preferably, the limiting component includes a rotating plate rotatably connected to the top of the indexing plate, the indexing plate having a rotating slot that engages with the rotating plate, a locking groove extending through the bottom of the rotating slot, a locking strip on the rotating plate engaging with the locking groove, and a plurality of limiting lock slots on the top of the adjusting ring, the locking strip extending through the locking groove and inserted into the limiting lock slot.

[0019] By adopting the above technical solution, the rotating plate is inserted into the locking groove, and then the locking insert and the limiting lock groove are engaged to lock the adjusting ring and the indexing plate, thereby enabling the indexing plate to be used more stably.

[0020] Preferably, a first support ring is provided at the bottom of the indexing plate, and a second support ring is rotatably connected to the support swing seat. Both the first and second support rings are coaxially arranged with the second drive shaft. The second support ring is threadedly connected to the first support ring. An insertion groove is provided through the upper side of the second support ring. The insertion groove is inserted into the locking strip, and the locking strip abuts against the inner side of the first support ring.

[0021] By adopting the above technical solution, the first support swivel and the second support swivel are threaded together to support the periphery of the indexing plate, thereby enabling indexing plates of different heights to be supported more stably and ensuring the stability of the indexing plate.

[0022] Preferably, a friction strip is provided at one end of the locking insert near the first support ring.

[0023] By adopting the above technical solution, the use of friction strips can enable the locking insert to better restrict the first support ring, thereby improving the stability of the first support ring.

[0024] Preferably, the support base is slidably connected to both sides of an adjusting groove, an adjusting slider is slidably connected in the adjusting groove, a rotating roller is rotatably connected to the upper side of the adjusting slider, the rotating roller abuts against the bottom of the indexing plate, and an abutting bolt is threadedly connected to the adjusting slider, the abutting bolt abuts against the bottom of the adjusting groove.

[0025] By adopting the above technical solution, the bearings of the indexing plate can be supported by rotating rollers, thereby improving the stability of the indexing plate in use.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When machining parts, the workpiece is first placed and fixed on the indexing plate. After the workpiece is fixed, the first and second drive components are activated. Simultaneously, the first and second rotating shafts rotate: the first rotating shaft drives the support swing component to rotate, and the swing amplitude of the support swing component can be set through machining programming; the second rotating shaft drives the indexing plate to rotate, and the rotation speed of the indexing plate can also be set through machining programming, thereby controlling the final machining accuracy of the workpiece. Because the support swing component has a U-shaped structure, with its central part concave downwards and both sides extending upwards, the center of the workpiece and the center of the drive shaft remain coaxial, significantly reducing the positioning accuracy required during part machining. 2. The limit bearing can limit the second drive shaft in both axial and radial directions. By suppressing the axial movement and radial runout of the shaft, it effectively ensures the motion stability of the second drive shaft and avoids accuracy deviation caused by shaft displacement and shaking. The second support block provides auxiliary support to the indexing plate, thereby further improving the overall stability and rotational accuracy of the indexing plate during rotation. 3. During use, the height of the indexing plate can be adjusted by the threaded engagement of the adjusting ring and the adjusting column. Depending on the height of the product, the center of the product to be processed can be better aligned with the center of the first drive component. When making fine adjustments, the entire device can be adjusted more precisely, improving the accuracy of the cradle adjustment control and ensuring the accuracy of the cradle. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a single-drive cradle according to Embodiment 1 of this application; Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 This is an overall cross-sectional view of a single-drive cradle according to Embodiment 1 of this application; Figure 4 This is a schematic diagram illustrating the protective cover structure, as shown in Embodiment 1 of this application. Figure 5 This is a schematic diagram illustrating the rotating plate structure, as shown in Embodiment 2 of this application. Reference numerals: 1. Rotating support; 2. Power drive chamber; 3. T-slot; 4. Indexing plate; 5. Circular hole; 6. Support swing seat; 7. Second drive shaft; 8. Second drive component; 9. Limit bearing; 10. Second support block; 11. Drive mounting cavity; 12. Center hole; 13. First support block; 14. First drive shaft; 15. First drive component; 16. Power chamber; 17. Protective cover; 18. Circular countersunk hole; 19. Involute slope; 20. Locking insert; 21. Rotating plate; 22. First support rotating ring; 24. Adjusting slide; 25. Adjusting slider; 26. Abutment bolt; 27. Adjusting column; 28. Adjusting ring; 29. ​​Second support rotating ring; 30. Friction strip; 31. Inclined slot; 32. Rotating roller. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 - Figure 5 This application will be described in further detail.

[0029] This application discloses a single-drive cradle.

[0030] Example 1 Reference Figure 1A single-drive cradle includes a power drive chamber 2, within which a power cavity 16 is formed. A first drive component 15 is installed within the power cavity 16, and a first drive shaft 14 is fixed to the first drive component 15. A support swing seat 6 is rotatably connected to the first drive shaft 14. The support swing seat 6 is U-shaped, concave in the middle and extending upward on both sides, forming a stable cradle-type support structure that keeps the center of the workpiece coaxial with the center of the drive shaft, significantly reducing positioning accuracy deviations during part processing. Rotary supports 1 are provided at both ends of the support swing seat 6, and the support swing seat 6 is rotatably connected to the rotating supports 1. A protective cover 17 is installed below the support swing seat 6. A drive mounting cavity 11 is formed inside the support swing seat 6, and a second drive component 8 is installed within the drive mounting cavity 11. A second drive shaft 7 is fixed to the end of the second drive component 8 away from the protective cover 17, and an indexing plate 4 is rotatably connected to the second drive shaft 7. The indexing plate 4 can fix the workpiece to be processed, ensuring the stability of the workpiece during processing.

[0031] Multiple first support blocks 13 are evenly spaced on one side of the drive mounting cavity 11 near the power drive compartment 2, and each first support block 13 has a central hole 12 at its center. The hollow design of the first support blocks 13 can significantly reduce the overall weight of the support swing base 6, reduce the rotational inertia of the support swing base 6 when swinging, reduce the power loss and load pressure of the first drive component 15, and improve the motion response speed and start-stop accuracy of the first rotating shaft. The hollow part of the first support block 13 forms an internal cable passage for the motor cable in the drive mounting cavity 11 to pass through, making the wiring more neat.

[0032] The second support block 10 is integrally formed on the side of the support base 6 near the indexing plate 4. A limit bearing 9 is assembled between the second support block 10 and the second drive shaft 7. The limit bearing 9 is a tapered roller bearing. The limit bearing 9 can limit the second drive shaft 7 axially and radially. The second support block 10 is used to assist in supporting the indexing plate 4, thereby improving the stability and motion accuracy of the indexing plate 4 during rotation.

[0033] A protective cover 17 is installed on the bottom of the support base 6. Multiple circular countersunk holes 18 are provided on the outer side of the protective cover 17. Corresponding to the circular countersunk holes 18, threaded grooves are provided on the bottom of the support base 6. The protective cover 17 and the support base 6 are fastened together by bolts passing through the circular countersunk holes 18 and screwed into the threaded grooves. The threaded grooves allow for precise bolt positioning and quick assembly. The connection method of the bolts and threaded grooves facilitates the disassembly of the protective cover 17, thereby facilitating subsequent maintenance and upkeep of the second drive component 8 and the wiring within the drive mounting cavity 11. An involute slope 19 is provided at the bottom of the protective cover 17. The downward involute slope 19 better avoids other structures, improving the ease of use of the support base 6.

[0034] The indexing plate 4 has a circular disc structure with multiple T-shaped grooves 3 on the disc body. Each T-shaped groove 3 has multiple circular holes 5 on its periphery. The T-shaped grooves 3 are used for positioning and locking the workpiece to be clamped. The circular holes 5 can effectively reduce the overall weight of the indexing plate 4, while adapting to the installation requirements of various auxiliary fasteners, improving clamping stability and structural practicality.

[0035] The implementation principle of a single-drive cradle in Embodiment 1 of this application is as follows: When processing parts, the workpiece is first placed on the indexing plate 4, and the workpiece to be processed is fixed by the T-slot 3 on the indexing plate 4; if the workpiece needs to be fixed in a special position during processing, auxiliary fixing parts can also be installed through the circular holes 5 on the indexing plate 4. After the workpiece is fixed, the first drive component 15 and the second drive component 8 are started. At the same time as the two drive components are started, the first rotating shaft and the second rotating shaft rotate: the first rotating shaft drives the support swing component to rotate, and the swing amplitude of the support swing component can be set by processing programming; the second rotating shaft drives the indexing plate 4 to rotate, and the rotation speed of the indexing plate 4 can also be set by processing programming, thereby controlling the final processing accuracy of the workpiece. Because the support swing base 6 has a U-shaped structure, with its middle part concave downward and its two sides extending upward, the center of the workpiece and the center of the drive shaft are kept coaxial, which can greatly reduce the deviation of the form and position accuracy during the processing of the parts, ensure the structural integrity of the processed parts, and effectively improve the overall processing accuracy of the workpiece.

[0036] Example 2 Reference Figure 5 The difference between this embodiment and Embodiment 1 is that an adjusting ring 28 is installed inside the limiting bearing 9. The bottom of the adjusting ring 28 is fixed to the second drive shaft 7, and an adjusting column 27 is threadedly connected to the adjusting ring 28. The adjusting column 27 is coaxially arranged with the first drive shaft 14. The top of the adjusting column 27 is used to support the indexing plate 4, and a limiting component is installed on the indexing plate 4 to lock the indexing plate 4 and the adjusting ring 28 relative to each other.

[0037] The limiting assembly includes two rotating pieces 21 rotatably connected to the top of the indexing plate 4. The indexing plate 4 has a rotating slot that engages with the rotating pieces 21. A locking groove is provided through the bottom of the rotating slot. A locking strip 20 is provided on the rotating piece 21 that engages with the locking groove. The top of the adjusting ring 28 has multiple limiting lock grooves. The limiting lock grooves are provided through the side wall of the adjusting ring 28. The locking strip 20 is inserted into the limiting lock groove through the locking groove.

[0038] A first support ring 22 is fixed to the bottom of the indexing plate 4, and a second support ring 29 is rotatably connected to the support base 6. Both the first and second support rings 22 and 29 are coaxially arranged with the second drive shaft 7. The second support ring 29 is threadedly connected to the first support ring 22. An inclined slot 31 is provided through the upper side of the second support ring 29, which is engaged with a locking strip 20. The locking strip 20 abuts against the inner side of the first support ring 22. A friction strip 30 made of rubber is fixed to one end of the locking strip 20 near the first support ring 22.

[0039] The support base 6 has adjustable grooves 24 on both sides, and adjustable sliders 25 are slidably connected inside the adjustable grooves 24. A rotating roller 32 is rotatably connected to the upper side of the adjustable slider 25. The rotating roller 32 abuts against the bottom of the indexing plate 4. An abutting bolt 26 is threadedly connected to the adjustable slider 25 and abuts against the bottom of the adjustable groove 24.

[0040] The implementation principle of Example 2 is as follows: During use, the height of the indexing plate 4 can be adjusted by adjusting the threaded engagement between the adjusting ring 28 and the adjusting column 27. Depending on the height of the product, the center of the product to be processed can be better aligned with the center of the first driving component 15. When making a micro-adjustment, the entire device can be adjusted more precisely, improving the accuracy of the cradle adjustment control and ensuring the accuracy of the cradle.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A single-drive cradle, characterized in that: The device includes a power drive chamber (2), a power cavity (16) is formed inside the power drive chamber (2), a first drive component (15) is installed inside the power cavity (16), a first drive shaft (14) is fixed on the first drive component (15), a support swing seat (6) is rotatably connected to the first drive shaft (14), the support swing seat (6) is a U-shaped structure with a downward recess in the middle and upward extension on both sides, a rotating support (1) is provided at both ends of the support swing seat (6), the support swing seat (6) is rotatably connected to the rotating support (1), a protective cover (17) is installed below the support swing seat (6), a drive mounting cavity (11) is opened inside the support swing seat (6), a second drive component (8) is installed inside the drive mounting cavity (11), a second drive shaft (7) is fixed at the end of the second drive component (8) away from the protective cover (17), and an indexing plate (4) is rotatably connected to the second drive shaft (7).

2. The single-drive cradle according to claim 1, characterized in that: The support base (6) has a second support block (10) integrally formed on the side near the indexing plate (4). A limit bearing (9) is assembled between the second support block (10) and the second drive shaft (7). The limit bearing (9) is used to support the indexing plate (4).

3. The single-drive cradle according to claim 1, characterized in that: The drive mounting cavity (11) is equipped with a plurality of first support blocks (13) evenly spaced on the side near the power drive compartment (2). Each first support block (13) has a central hole (12) at its center, and the internal cables pass through the central hole (12) of the first support block (13).

4. A single-drive cradle according to claim 1, characterized in that: The protective cover (17) has multiple circular countersunk holes (18) on its outer side. The bottom of the support base (6) has a threaded groove corresponding to the circular countersunk holes (18). The protective cover (17) and the support base (6) are fastened together by bolts that pass through the circular countersunk holes (18) and are screwed into the threaded grooves. The bottom of the protective cover (17) has an involute slope (19) that is inclined downwards.

5. A single-drive cradle according to claim 1, characterized in that: The indexing plate (4) has multiple T-shaped grooves (3), and each T-shaped groove (3) has multiple circular holes (5) on its periphery.

6. A single-drive cradle according to claim 2, characterized in that: An adjusting ring (28) is provided inside the limiting bearing (9). The bottom of the adjusting ring (28) is fixed on the second drive shaft (7). An adjusting column (27) is threadedly connected to the adjusting ring (28). The top of the adjusting column (27) is used to support the indexing plate (4). A limiting component is provided on the indexing plate (4) to lock the indexing plate (4) and the adjusting ring (28) relative to each other.

7. A single-drive cradle according to claim 6, characterized in that: The limiting component includes a rotating plate (21) rotatably connected to the top of the indexing plate (4). The indexing plate (4) has a rotating slot that engages with the rotating plate (21). A locking groove is provided through the bottom of the rotating slot. A locking strip (20) is provided on the rotating plate (21) that engages with the locking groove. The top of the adjusting ring (28) has multiple limiting lock slots. The locking strip (20) is inserted into the limiting lock slot through the locking groove.

8. A single-drive cradle according to claim 7, characterized in that: The indexing plate (4) is provided with a first support rotating ring (22) at the bottom, and a second support rotating ring (29) is rotatably connected to the support swing seat (6). The first support rotating ring (22) and the second support rotating ring (29) are both coaxially arranged with the second drive shaft (7). The second support rotating ring (29) is threadedly connected to the first support rotating ring (22). A through insertion groove is provided on the upper side of the second support rotating ring (29). The insertion groove is inserted into the locking insert (20). The locking insert (20) abuts against the inner side of the first support rotating ring (22).

9. A single-drive cradle according to claim 8, characterized in that: The locking insert (20) has a friction strip (30) at one end near the first support ring.

10. A single-drive cradle according to claim 9, characterized in that: The support base (6) is slidably connected to the two sides by adjustment grooves (24), and an adjustment slider (25) is slidably connected in the adjustment grooves (24). A rotating roller (32) is rotatably connected to the upper side of the adjustment slider (25), and the rotating roller (32) abuts against the bottom of the indexing plate (4). An abutting bolt (26) is threadedly connected to the adjustment slider (25), and the abutting bolt (26) abuts against the bottom of the adjustment groove (24).

Images