A new workbench moving device
By adopting a worktable changing device with a small-rotation dual-drive method, the problems of large space occupation and long replacement cycle of existing devices are solved, realizing rapid worktable replacement and efficient machine tool processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QI ZHONG SHU KONG ZHUANG BEI GU FEN YOU XIAN GONG SI
- Filing Date
- 2022-12-28
- Publication Date
- 2026-06-09
Smart Images
Figure CN115781322B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a novel worktable changing device, belonging to the field of machine tool technology. Background Technology
[0002] Currently, to improve processing efficiency, machining centers are equipped with a worktable drag-and-drop system, which enables simultaneous operation of the main machine and external alignment, shortening the time required for clamping and alignment.
[0003] A worktable pallet exchange device for a vertical lathe (publication number CN111673489A) provides a worktable drag-and-drop device. Both this device and existing worktable drag-and-drop devices use a single-drive method, resulting in large pallet sizes, large rotation ranges, large space occupancy, and cumbersome drag-and-drop operations. The specific replacement steps after the workpiece on the main machine's worktable are as follows: Figure 4 The process involves: 1. Rotating the worktable upwards to pull it back to the main machine's worktable; 2. Rotating downwards to align the worktable; 3. Pushing it out of the storage device; 4. Moving the worktable towards the alignment worktable; 5. Pulling the alignment worktable back; 6. Rotating upwards to push the alignment worktable onto the machine tool's machining position. This worktable replacement mechanism results in a very long worktable replacement cycle, significantly impacting production efficiency. Summary of the Invention
[0004] To address the shortcomings of the existing technology, this invention provides a novel worktable changing device that reduces worktable changing steps, increases changing speed, and enables efficient machine tool processing.
[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a novel worktable towing device, comprising a rotary table, a base, and a double-towing worktable mechanism. The rotary table is mounted on the main shaft of the base. A radial bearing sleeved on the main shaft and an end face bearing pressed against the bottom surface of the rotary table are provided between the rotary table and the base. A gear ring is provided at the bottom of the rotary table. A rotary servo motor is provided on the side wall of the base. The rotary servo motor meshes with the gear ring after being reduced in speed by multiple sets of gears. A guide rail that can slide and connect with the main worktable is provided at the top of the rotary table. A chain connected by sprockets is provided inside the rotary table between the guide rails. A drive servo motor is provided on the rotary table. The shaft end of the drive servo motor is fixedly connected to the drive sprocket on the chain. The center distance between the rotary table and the main worktable, the alignment worktable, and the storage device are all the same. A double-towing worktable mechanism is provided on the chain of the rotary table. The double-towing worktable mechanism is provided with a pull plate that can pull two worktables simultaneously.
[0006] Furthermore, when the double-tow worktable mechanism pulls the worktable to the center of the rotary table via the chain, this is the farthest distance the chain pulls the double-tow worktable mechanism from the center of the rotary table. At this time, one pull plate is located in the worktable hanging slot on the rotary table, and the other pull plate is suspended outside the rotary table. The rotation trajectory line of the suspended pull plate with the axis of the rotary table as the center coincides with the center line of the pull plate hanging slot on the main worktable and the alignment worktable.
[0007] The beneficial effects of this invention are as follows: Compared with existing worktable changing devices, the changing device provided in this application adopts a small-rotation dual-drive method, which saves space, runs fast, and shortens the changing steps, solves the problem of slow worktable changing in existing machining centers, improves the speed of worktable changing in machining centers, and achieves efficient machine tool processing by optimizing mechanical structure and logic control. Attached Figure Description
[0008] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0009] Figure 1 This is a cross-sectional view of the structure of the present invention.
[0010] Figure 2 This is a cross-sectional view (AA) of the present invention.
[0011] Figure 3 This is a diagram illustrating the action of changing the worktable in this invention.
[0012] Figure 4 A diagram illustrating the action of replacing the worktable when replacing an existing towing device.
[0013] Numbering on the map:
[0014] 1. Rotary table, 2. Main machine worktable, 3. Alignment worktable, 4. Storage device, 5. Base, 6. Double-tow worktable mechanism, 11. Guide rail, 12. Drive servo motor, 13. Drive sprocket, 14. Chain, 51. Spindle, 52. Radial bearing, 53. End face bearing, 54. Gear ring, 55. Rotary servo motor, 61. Support plate, 62. Linear guide rail, 63. Linear guide rail slider, 64. Connector, 65. Rotary shaft, 66. Pull plate, 67. Hydraulic cylinder, 68. Piston rack. Detailed Implementation
[0015] like Figures 1-4 As shown, a novel workbench towing device includes a rotary table 1, a base 5, and a double-towing workbench mechanism 6. The base 1 is installed between the main workbench 2, the alignment workbench 3, and the storage device 4. The main workbench 2, the alignment workbench 3, and the storage device 4 are arranged in a circular array with the base 1 as the center at a 90° angle.
[0016] The rotary table 1 is mounted on the spindle 51 of the base 5. The center distance between the rotary table 1 and the main worktable 2, the alignment worktable 3, and the storage device 4 is the same. A radial bearing 52 is fitted on the spindle 51 and an end bearing 53 is pressed against the bottom surface of the rotary table 1 between the rotary table 1 and the base 5. The radial bearing 52 and the end bearing 53 provide greater load-bearing capacity for the rotary table 1. A gear ring 54 is fitted on the bottom of the rotary table 1 and is fastened to the rotary table 1 by screws. A rotary servo motor 55 is provided on the side wall of the base 5. A bevel gear is provided at the end of the rotary servo motor 55. The bevel gear meshes with a large bevel gear installed in the base 5 through a bearing. The other end of the bearing of the large bevel gear is fixed with a gear that meshes with the gear ring 54. Driven by the rotary servo motor 55 as a power source, the rotary table 1 completes the rotation work through the transmission of gears and bearings.
[0017] A pair of guide rails 11 are provided on the top of the rotary table 1. The spacing between the guide rails 11 is the same as the spacing between the guide rails of the main machine worktable 2 and the alignment worktable 3. A chain 14 connected by sprockets is provided inside the rotary table 1 between the guide rails 11. The direction of the chain 14 is the same as the direction of the guide rails 11. The sprockets are mounted on the inner surface of the rotary table 1 through bearings. A drive servo motor 12 is provided on the rotary table 1. The shaft end of the drive servo motor 12 is inserted into the drive sprocket 13 on the chain 14 and is fixedly connected to the drive sprocket 13 through a key. A double-drag worktable mechanism 6 is provided on the chain 14 of the rotary table 1. Driven by the drive servo motor 12 as the power source, the double-drag worktable 6 completes the movement work through the transmission of sprockets, bearings and chain 14.
[0018] The double-drag worktable mechanism 6 consists of a pallet 61, linear guide rails 62, linear guide rail sliders 63, a connecting body 64, a rotary shaft 65, a pull plate 66, a hydraulic cylinder 67, and a piston rack 68. A pair of linear guide rails 62 are fixed on the rotary table 1 between guide rails 11. The linear guide rails 62 are parallel to the guide rails 11. A guide rail slider 63 is provided on the linear guide rails 62, and a pallet 61 is provided on the guide rail slider 63 by screws. The pallet 61 can slide on the linear guide rails 62. The pallet 61 is connected to the chain 14 through the connecting body 64. When the chain 14 rotates, the pallet 61 can move horizontally under the limit of the linear guide rails 62. A rotary shaft 65 extending from both ends is provided at the bottom of the pallet 61. The axis of the rotary shaft 65 is parallel to the linear guide rails 62. The rotary shaft 65 is fixed to the bottom surface of the pallet 61 by a bearing seat. The rotary shaft 65 can rotate axially, but its radial direction is fixed by the bearing seat and cannot move forward or backward. Both ends of the rotary shaft 65 are equipped with pull plates 66 for pushing and pulling worktables. The pull plates 66 are fixedly connected to the ends of the rotary shaft 65. The bottom of the support plate 61 is equipped with a hydraulic cylinder 67. The cylinder rod of the hydraulic cylinder 67 is a piston rack 68. The side wall of the rotary shaft 65 is provided with gear teeth. The piston rack 68 meshes with the side wall of the rotary shaft 65. The hydraulic cylinder 67 is connected to the machine tool hydraulic system. The rotary shaft 65 can swing 90 degrees through the hydraulic cylinder 67.
[0019] When the double-tow worktable mechanism 6 pulls the worktable to the center position of the rotary table 1 via the chain 14, it is the farthest distance that the chain 14 pulls the double-tow worktable mechanism 6 from the center of the rotary table 1. When it moves in the opposite direction, it is the farthest distance that the double-tow worktable mechanism 6 is pushed from the center of the rotary table 1.
[0020] When the double-draft worktable mechanism 6 pulls the worktable to the axis position of the rotary table 1, that is, when the double-draft worktable mechanism 6 is at its farthest distance from the center of the rotary table 1, one of its pull plates 66 is located in the worktable hanging groove on the rotary table 1, while the other pull plate 66 is suspended outside the rotary table 1. The rotation trajectory line of the suspended pull plate 66 with the axis of the rotary table 1 as the center coincides with the center line of the pull plate hanging groove on the main worktable 2 and the alignment worktable 3. The width of the hanging groove on the bottom surface of the worktable is the same as the thickness of the pull plate 66, and chamfers are provided at both ends of the hanging groove.
[0021] like Figure 3 As shown, the dual-draft worktable mechanism 6 is located at the leftmost end of the rotary table 1. The rotary table 1 rotates 90° clockwise to the main unit position, and the pull plate 66 of the dual-draft worktable mechanism 6 enters the hanging slot of the main unit worktable 2. The main unit worktable 2 is placed in the center of the rotary table 1. At this time, the pull plate 66 on the other side of the dual-draft worktable mechanism 6 is suspended outside the rotary table 1 and rotates 90° counterclockwise. During the rotation, the movement trajectory line of the suspended pull plate 66 coincides with the center line of the hanging slot of the alignment worktable 3, so that it directly hangs on the alignment worktable 3. At this time, the dual-draft worktable mechanism 6 is dragged to move the main unit worktable 2 towards the storage device 4. While the main unit worktable 2 is moving, the dual-draft worktable mechanism 6 pulls the alignment worktable 3 at the same time, so that it can drag two sets of worktables at the same time. After the main unit worktable 2 is placed, the alignment worktable 3 is exactly in the center of the rotary table 1. At this time, the rotary table 1 rotates 90° counterclockwise, and the alignment worktable 3 can be dragged towards the main unit position. Thus, one cycle is completed.
[0022] Starting from the leftmost end of the rotary table 1, the rotary table 1 rotates 3 times and the double-draft worktable mechanism 6 translates 3 times. Compared with the existing towing and changing device, the two translation steps are eliminated. Compared with the existing worktable towing and changing device, the changing steps are shortened, which improves the speed of changing worktables in the machining center. The machine tool achieves high-efficiency machining by optimizing the mechanical structure and logic control.
Claims
1. A novel workbench towing device, comprising a rotary table (1), a base (5), and a double-towing workbench mechanism (6), wherein the rotary table (1) is mounted on the main shaft (51) of the base (5), and a radial bearing (52) sleeved on the main shaft (51) and an end face bearing (53) pressed on the bottom surface of the rotary table (1) are provided between the rotary table (1) and the base (5), a gear ring (54) is provided at the bottom of the rotary table (1), and a rotary servo motor (55) is provided on the side wall of the base (5), the rotary servo motor (55) meshes with the gear ring (54) after being reduced by multiple sets of gears; a guide rail (11) is provided on the top of the rotary table (1) and can be slidably connected to the host workbench (2), a chain (14) connected by a sprocket is provided in the rotary table (1) between the guide rails (11), and a drive servo motor (12) is provided on the rotary table (1), the shaft end of the drive servo motor (12) is fixedly connected to the drive sprocket (13) on the chain (14), characterized in that: The center distance between the rotary table (1) and the main machine worktable (2), the alignment worktable (3) and the storage device (4) is the same. The rotary table (1) is equipped with a double-tow worktable mechanism (6) on the chain (14). The double-tow worktable mechanism (6) is equipped with a pull plate (66) that can pull the two worktables at the same time. The double-tow worktable mechanism (6) consists of a support plate (61), a linear guide rail (62), a linear guide rail slider (63), a connecting body (64), and a rotary shaft (65). It consists of a pull plate (66), a hydraulic cylinder (67), and a piston rack (68). A pair of linear guide rails (62) are fixed on the rotary table (1) between the guide rails (11). A support plate (61) is provided on the linear guide rail (62). The support plate (61) is slidably connected to the linear guide rail (62) through the linear guide rail slider (63). The support plate (61) is connected to the chain (14) through the connecting body (64). The bottom of the support plate (61) is provided with a rotary shaft extending from both ends. (65), the rotary shaft (65) is fixed on the support plate (61) by a bearing seat. The rotary shaft (65) is axially rotatable and radially positioned by the bearing seat. Both ends of the rotary shaft (65) are provided with pull plates (66) for pushing and pulling the worktable. The bottom of the support plate (61) is provided with a hydraulic cylinder (67). The cylinder rod of the hydraulic cylinder (67) is a piston rack (68). The piston rack (68) meshes with the side wall of the rotary shaft (65). The double-draft worktable mechanism (6) pulls the worktable through the chain (14). When the worktable is at the axis position of the rotary table (1), it is the farthest distance from the center of the rotary table (1) to the double-draft worktable mechanism (6) pulled by the chain (14). At this time, one pull plate (66) is located in the worktable hanging groove on the rotary table (1), and the other pull plate (66) is suspended outside the rotary table (1). The rotation trajectory line of the rotary table (1) with the axis of the suspended pull plate (66) as the center coincides with the center line of the pull plate hanging groove on the main worktable (2) and the alignment worktable (3).