Advancing limiting mechanism for gantry machining center

Abstract

The utility model provides an advancing limiting mechanism for a gantry machining center, and relates to the technical field of gantry machining centers, the advancing limiting mechanism comprises a gantry machining center body and a movable jig seat, a servo motor is fixed in the middle of one end of the bottom of the inner wall of the gantry machining center body, and a threaded rod is fixed at the power output end of the servo motor; supporting wheels are arranged at the four corners of the bottom of the movable jig base. According to the device, the threaded rod is driven to rotate through the servo motor, through cooperation of the threaded hole, the movable sleeve generates horizontal movement force to compress the spring on one side and stretch the spring on the other side, then the springs release energy to enable the movable jig base to slide, and when the movable sleeve stops moving, the spring on one side stretches the spring on the other side for compression; the inertia energy of the moving jig seat from sliding to stopping is absorbed, the impact force of the threaded hole of the moving sleeve and the threaded rod is reduced, and therefore the effects of reducing the impact force borne by the driving device and prolonging the service life of the threaded rod are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gantry machining centers, and more specifically, relates to a travel limiting mechanism for gantry machining centers. Background Art

[0002] A gantry machining center (Gantry CNC) is a large machining center with the spindle's Z-axis perpendicular to the worktable. The overall structure consists of a double-column, top beam, and a crossbeam between the two columns, forming a portal-like frame. These centers are particularly well-suited for machining large and complex workpieces. There are various types of gantry CNCs, including fixed-beam (with a fixed crossbeam and a movable / rotating worktable), movable-beam (with a vertically movable crossbeam and a forward-and-backward moving worktable), movable-column (with a fixed worktable and a movable gantry), and overhead crane (with a fixed worktable and a movable crossbeam). These types also include combinations of these. Each type of CNC machine has distinct machining characteristics, capabilities, and intended product applications.

[0003] The existing publication number CN220347491U discloses a travel limit mechanism for a gantry machining center. Although it is equipped with a drive motor, a drive gear, a driven gear, a right-angle limit block, and a limit slot, when braking, the drive motor drives the drive shaft to rotate, and the drive gear transmits torque to the driven gear to drive the right-angle limit block to flip out and quickly engage in the limit slot, thereby reducing the offset of the mobile fixture seat and having high limit accuracy, which solves the problem of insufficient limit accuracy.

[0004] Based on the above, the inventors found that the following problems exist: However, the travel mechanism is driven by using a motor and a threaded rod, and the volume and mass of the mobile fixture seat are large, and the mass of the workpiece to be processed placed on the top is even larger. When the threaded rod is driven to start and stop, the threads of the threaded rod and the matching threaded sleeve will be subjected to a large impact force. After long-term use, the threads will be severely worn, making it difficult to use subsequently.

[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a travel limit mechanism for a gantry machining center is provided in order to achieve a more practical purpose. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a travel limit mechanism for a gantry machining center to solve the problem that the threads of the existing threaded rod and the matching threaded sleeve are subject to large impact forces and the threads will be severely worn after long-term use.

[0007] The utility model provides a travel limit mechanism for a gantry machining center, which is achieved by the following specific technical means:

[0008] A travel limiting mechanism for a gantry machining center comprises a gantry machining center body and a mobile fixture seat, a servo motor is fixed to the middle of one end of the bottom inner wall of the gantry machining center body, a threaded rod is fixed to the power output end of the servo motor, support wheels are provided at the four corners of the bottom of the mobile fixture seat, a center rod is fixed to the middle of the bottom of the mobile fixture seat, a first hinge seat is fixed on both sides of both ends of the center rod, four first hinge seats are rotatably connected to sleeve rods inside the four first hinge seats, telescopic rods are movably sleeved inside the four sleeve rods, springs are fixed to the outside of the sleeve rod and the telescopic rod, one end of two adjacent telescopic rods is rotatably connected to a second hinge seat, a moving sleeve is fixed to one side of the second hinge seat, the moving sleeve is threadedly connected to the threaded rod, an electric control valve is fixed to the middle of the bottom of the center rod, and a worktable is fixed to the top of the mobile fixture seat.

[0009] Furthermore, a threaded hole is provided through the middle of one side of each of the two movable sleeves, and the threaded rod is used in conjunction with the threaded hole.

[0010] Furthermore, a through hole is opened through the middle of the central rod, the threaded rod movably passes through the through hole, and the electric control valve is used to control the opening and closing degree of the through hole.

[0011] Furthermore, two ends of the spring are respectively fixed to two opposite ends of the outer walls of the sleeve rod and the telescopic rod, and the length of the spring is equal to the sum of the lengths of the sleeve rod and the telescopic rod.

[0012] Furthermore, the length of the threaded rod is equal to the length of the gantry machining center body, and the other end of the threaded rod is rotatably connected to the other end of the inner wall of the gantry machining center body.

[0013] Furthermore, a placement slot is provided on the top of the loading platform, and there are four placement slots, which are respectively located on both sides of the middle of the loading platform in the horizontal and vertical directions.

[0014] Furthermore, steel wire ropes are placed inside the four placement grooves, and connectors are fixed at both ends of the steel wire ropes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the utility model, a servo motor drives the threaded rod to rotate, and the cooperation of the threaded hole causes the movable sleeve to generate a force for horizontal movement, compressing the spring on one side and stretching the spring on the other side. Then the spring releases energy to make the movable fixture seat slide. When the movable sleeve stops moving, the spring on one side stretches the spring on the other side and compresses it, absorbing the inertial energy of the movable fixture seat from sliding to stopping, reducing the impact force between the threaded hole of the movable sleeve and the threaded rod, thereby achieving the effect of reducing the impact force on the driving device and increasing the service life of the threaded rod.

[0017] 2. In the utility model, four steel wire ropes are placed at the bottom of the workpiece, with the spacing and position corresponding to the four placement slots, and then a lifting device is used to connect the connectors of the steel wire ropes and lift them on the top of the loading platform. After processing is completed, the lifting device is used to pull up the eight connectors of the four steel wire ropes to lift the processed workpiece, thereby achieving the effect of quickly picking up and placing the workpiece to be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the bottom structure of the mobile fixture seat of the utility model.

[0020] Figure 3 It is a bottom view schematic diagram of the structure of the movable fixture seat of the utility model.

[0021] Figure 4 It is a structural diagram of the loading platform of the utility model.

[0022] The corresponding relationship between the component names and the drawing numbers in the figure is as follows:

[0023] 1. Gantry machining center body; 2. Mobile fixture seat; 3. Support wheel; 4. Center rod; 41. Through hole; 42. Electric control valve; 5. First hinge seat; 6. Sleeve rod; 7. Telescopic rod; 8. Spring; 9. Mobile sleeve; 91. Threaded hole; 10. Second hinge seat; 11. Loading platform; 111. Placement slot; 12. Wire rope; 13. Connector; 14. Servo motor; 15. Threaded rod. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, unless otherwise specified, “plurality” means two or more; in addition, the terms “first”, “second”, “third”, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] Example:

[0027] As attached Figure 1 To the attached Figure 4 As shown:

[0028] The utility model provides a travel limiting mechanism for a gantry machining center, comprising a gantry machining center body 1 and a mobile fixture seat 2, a servo motor 14 is fixed in the middle of one end of the bottom of the inner wall of the gantry machining center body 1, a threaded rod 15 is fixed to the power output end of the servo motor 14, support wheels 3 are provided at the four corners of the bottom of the mobile fixture seat 2, a center rod 4 is fixed in the middle of the bottom of the mobile fixture seat 2, a first hinge seat 5 is fixed on both sides of both ends of the center rod 4, the four first hinge seats 5 are rotatably connected to the inside of a sleeve rod 6, the four sleeve rods 6 are movably sleeved with a telescopic rod 7, springs 8 are fixed to the outside of the sleeve rod 6 and the telescopic rod 7, one end of two adjacent telescopic rods 7 is rotatably connected to a second hinge seat 10, a moving sleeve 9 is fixed to one side of the second hinge seat 10, the moving sleeve 9 and the threaded rod 15 are threadedly connected, an electric control valve 42 is fixed in the middle of the bottom of the center rod 4, and a loading platform 11 is fixed on the top of the mobile fixture seat 2.

[0029] Among them, a threaded hole 91 is opened through the middle of one side of each movable sleeve 9, and the threaded rod 15 is used in conjunction with the threaded hole 91. The threaded rod 15 is driven to rotate by the servo motor 14, and the threaded hole 91 cooperates to make the movable sleeve 9 generate a force for horizontal movement.

[0030] Among them, a through hole 41 is opened through the middle of the center rod 4, and the threaded rod 15 is movable through the inside of the through hole 41. The electric control valve 42 is used to control the opening and closing degree of the through hole 41. The threaded rod 15 passes through the inside of the center rod 4 and does not touch the center rod 4. The electric control valve 42 is electrically connected to the servo motor 14. When the servo motor 14 rotates, the electric control valve 42 keeps the through hole 41 open, the center rod 4 does not touch the threaded rod 15, and the threaded rod 15 can rotate normally. When the servo motor 14 is turned off, the electric control valve 42 starts to shrink the opening of the through hole 41, and the electric control valve 42 squeezes the threaded rod 15 to prevent the moving fixture base 2 from shaking when it is not necessary to move the moving fixture base 2.

[0031] Among them, the two ends of the spring 8 are respectively fixed to the opposite ends of the outer walls of the sleeve rod 6 and the telescopic rod 7, and the length of the spring 8 is equal to the sum of the lengths of the sleeve rod 6 and the telescopic rod 7. The sleeve rod 6 and the telescopic rod 7 are supported by the spring 8. When the movable sleeve 9 moves, the spring 8 on one side is first compressed and the spring 8 on the other side is stretched. Then the spring 8 releases energy to make the movable fixture seat 2 slide. When the movable sleeve 9 stops moving, the spring 8 on one side stretches the spring 8 on the other side to compress it, thereby absorbing the inertial energy of the movable fixture seat 2 from sliding to stopping.

[0032] Among them, the length of the threaded rod 15 is equal to the length of the gantry machining center body 1, and the other end of the threaded rod 15 is rotatably connected to the other end of the inner wall of the gantry machining center body 1. The threaded rod 15 is supported by the gantry machining center body 1 to prevent the threaded rod 15 from vibrating during rotation due to its excessive length.

[0033] Among them, a placement slot 111 is opened on the top of the workbench 11, and there are four placement slots 111. The four placement slots 111 are respectively located on both sides of the middle of the workbench 11 in the horizontal and vertical directions. The four placement slots 111 do not affect the normal placement of the workpiece to be processed.

[0034] Among them, steel wire ropes 12 are placed inside the four placement grooves 111, and connectors 13 are fixed at both ends of the steel wire ropes 12. After processing is completed, the eight connectors 13 of the four steel wire ropes 12 are pulled up by using a lifting device to lift the processed workpiece.

[0035] The specific usage and function of this embodiment are as follows:

[0036] In the present invention, first, four steel wire ropes 12 are placed at the bottom of the workpiece, and the placement spacing and position correspond to the four placement slots 111. Then, a lifting device is used to connect the connector 13 of the steel wire rope 12 and lift it to the top of the worktable 11. When horizontal and vertical movement and up and down movement are required for processing, the gantry machining center body 1 can be controlled. When the workpiece needs to be moved horizontally, the servo motor 14 is started to rotate, driving the threaded rod 15 to rotate. Through the cooperation of the threaded hole 91, the movable sleeve 9 generates a force for horizontal movement, compressing the spring 8 on one side and stretching the spring 8 on the other side. Then, the spring 8 releases energy to make the movable fixture seat 2 slide. When the movable sleeve 9 stops moving, The spring 8 on one side stretches the spring 8 on the other side to compress, absorbing the inertial energy of the movable fixture seat 2 from sliding to stopping. The electric control valve 42 is electrically connected to the servo motor 14. When the servo motor 14 rotates, the electric control valve 42 keeps the through hole 41 open, the center rod 4 does not touch the threaded rod 15, and the threaded rod 15 can rotate normally. When the servo motor 14 is closed, the electric control valve 42 starts to shrink the opening of the through hole 41, and the electric control valve 42 squeezes the threaded rod 15 to prevent the movable fixture seat 2 from shaking when it does not need to be moved. After the processing is completed, use the lifting device to pull up the eight connectors 13 of the four steel ropes 12 to lift the processed workpiece.

[0037] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A travel limit mechanism for a gantry machining center, comprising a gantry machining center body (1) and a movable fixture seat (2), wherein a servo motor (14) is fixed to the middle of one end of the bottom of the inner wall of the gantry machining center body (1), and a threaded rod (15) is fixed to the power output end of the servo motor (14), characterized in that: The four corners of the bottom of the movable fixture seat (2) are each provided with a supporting wheel (3); a center rod (4) is fixed in the middle of the bottom of the movable fixture seat (2); first hinge seats (5) are fixed on both sides of both ends of the center rod (4); four first hinge seats (5) are rotatably connected to sleeve rods (6) inside; four sleeve rods (6) are movably sleeved to telescopic rods (7) inside; springs (8) are fixed to the outside of the sleeve rods (6) and the telescopic rods (7); one end of two adjacent telescopic rods (7) is rotatably connected to a second hinge seat (10); a movable sleeve (9) is fixed on one side of the second hinge seat (10); the movable sleeve (9) and the threaded rod (15) are threadedly connected; an electric control valve (42) is fixed in the middle of the bottom of the center rod (4); and a loading platform (11) is fixed on the top of the movable fixture seat (2).

2. A travel limiting mechanism for a gantry machining center according to claim 1, characterized in that: A threaded hole (91) is provided through the middle of one side of each of the two movable sleeves (9), and the threaded rod (15) is used in conjunction with the threaded hole (91).

3. The travel limiting mechanism for a gantry machining center according to claim 1, characterized in that: A through hole (41) is provided through the middle of the center rod (4), the threaded rod (15) movably passes through the interior of the through hole (41), and the electric control valve (42) is used to control the opening and closing degree of the through hole (41).

4. A travel limiting mechanism for a gantry machining center as claimed in claim 3, characterized in that: The two ends of the spring (8) are respectively fixed to the two opposite ends of the outer walls of the sleeve rod (6) and the telescopic rod (7), and the length of the spring (8) is equal to the sum of the lengths of the sleeve rod (6) and the telescopic rod (7).

5. The travel limiting mechanism for a gantry machining center according to claim 1, characterized in that: The length of the threaded rod (15) is equal to the length of the gantry machining center body (1), and the other end of the threaded rod (15) is rotatably connected to the other end of the inner wall of the gantry machining center body (1).

6. The travel limiting mechanism for a gantry machining center according to claim 1, characterized in that: A placement slot (111) is provided on the top of the loading platform (11), and four placement slots (111) are provided. The four placement slots (111) are respectively located on both sides of the middle of the loading platform (11) in the horizontal direction and the vertical direction.

7. A travel limiting mechanism for a gantry machining center as claimed in claim 6, characterized in that: Steel wire ropes (12) are placed inside the four placement grooves (111), and connectors (13) are fixed at both ends of the steel wire ropes (12).

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