A machine tool gantry opening and closing structure

Abstract

This utility model discloses a machine tool gantry opening and closing structure, including a worktable. The worktable is provided with a first fixed seat, a second fixed seat, and an arc-shaped limiting groove. A crossbeam is located on the worktable, with a column and a counterweight plate at each end. A rotating device is installed near the counterweight plate. A locking block is provided at the end of the column, which can engage with an open slot on the first fixed seat. A pulley is rotatably provided at the end of the counterweight plate, and the pulley engages with the arc-shaped limiting groove. The other end of the rotating device is installed on the second fixed seat. When the rotating locking block disengages from the slot, the end of the crossbeam generates a downward force with a downward tendency, using the rotating device as a fulcrum. The pulley and the arc-shaped limiting groove still engage, limiting the position of the other end of the crossbeam and applying a tension equal to gravity, thus balancing the crossbeam and ensuring optimal force balance at all positions of the rotating device.

Description

Technical Field

[0001] This utility model belongs to the field of CNC machine tool structure technology, specifically a machine tool gantry opening and closing structure. Background Technology

[0002] A CNC milling machine is a machine tool that can use a spindle to mill workpieces. In order to process the workpiece more stably, a gantry is usually set up. A clamping component is located on the gantry. During processing, the workpiece is fixed by the clamping component. However, the gantry limits the space for loading, so the gantry is usually openable and closable. As shown in the published technical document "CN208681063U A clamping device for a CNC milling machine", the gantry is rotated by a rotating device to realize the opening and closing, which facilitates loading.

[0003] However, the gantry frame is very heavy, and the rotating device is located near one end of the gantry frame. When rotating, the rotating device not only needs to drive the gantry frame to rotate, but also needs to withstand very large stress, which causes the parts to age very quickly and are easily damaged. Utility Model Content

[0004] The purpose of this utility model is to provide a machine tool gantry opening and closing structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A machine tool gantry opening and closing structure includes a worktable, on which a first fixed seat, a second fixed seat and an arc-shaped limiting groove are respectively provided;

[0007] A crossbeam is provided on the workbench. At each end of the crossbeam is a column and a counterweight plate, and a rotating device is installed near the counterweight plate. The end of the column is provided with a locking block, which can engage with the open slot on the first fixed seat. The end of the counterweight plate is provided with a pulley that rotates and engages with the arc-shaped limiting groove. The other end of the rotating device is installed on the second fixed seat.

[0008] In a further technical solution, a fixing plate is installed on the second fixing seat. The fixing plate is rotatably connected to one end of the auxiliary cylinder through a first connecting member, and the other end of the auxiliary cylinder is rotatably connected to the side wall of the crossbeam through a second connecting member.

[0009] In a further technical solution, the extension direction of the auxiliary cylinder matches the engagement direction of the locking block.

[0010] In a further technical solution, the crossbeam is provided with a number of mounting positions, which are used to install clamping components, and the number of mounting positions is greater than or equal to the number of clamping components.

[0011] In a further technical solution, the workbench includes a base, on which a rotary motor is mounted, and a turntable pad is mounted on the output end of the rotary motor. One of the clamping components corresponds to the turntable pad, and a pressure rod is rotatably connected to its output end via a movable component.

[0012] A further technical solution involves installing auxiliary control panels on both sides of the rotating motor, with at least one auxiliary control panel having a pad fixed on it.

[0013] The beneficial effects of this utility model are:

[0014] When the crossbeam rotating block disengages from the slot, the rotating device acts as a fulcrum, generating a downward force at one end of the crossbeam and an upward force at the other. However, the pulley and the arc-shaped limiting groove still cooperate to limit the position of the other end of the crossbeam and apply a pulling force equal to gravity to balance the crossbeam. This ensures optimal force balance at all positions of the rotating device, enabling the crossbeam to open and close stably and extending its service life.

[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] Figure 1 : Application structure diagram of this utility model.

[0017] Figure 2 : A three-dimensional structural diagram of this utility model.

[0018] Figure 3 : Planar structural diagram of this utility model.

[0019] Figure 4 : Partial structural diagram of this utility model.

[0020] Reference numerals: 1-Workbench, 11-Base, 12-Rotary motor, 13-Secondary operating table, 14-Padded block, 15-Turntable pad, 21-First fixed seat, 22-Second fixed seat, 23-Arc-shaped limiting groove, 3-Crossbeam, 31-Column, 32-Counterweight plate, 33-Rotating device, 34-Clamping block, 35-Clamping groove, 36-Pulley, 37-Mounting position, 381-Pressure assembly, 382-Moving part, 383-Pressure rod, 41-Fixed plate, 42-First connecting piece, 43-Auxiliary cylinder, 44-Second connecting piece. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please refer to Figure 1-4 ;

[0023] The gantry frame opening and closing structure described in this utility model aims to make its operation more stable and extend its service life. Specifically, it includes a workbench 1, on which a first fixed seat 21, a second fixed seat 22, and an arc-shaped limiting groove 23 are respectively provided. These three are arranged in a straight line, with the second fixed seat 22 positioned close to the arc-shaped limiting groove 23 to avoid obstructing space on the workbench 1. A crossbeam 3 is provided on the workbench 1, with a column 31 at one end and a rotating device 33 installed near the other end. A locking block 34 is provided at the end of the column 31, which can engage with the opening slot 35 on the first fixed seat 21. The other end of the rotating device 33 is installed on the second fixed seat 22. The main body of the rotating device 33 is installed on the second fixed seat 22, and the output end is connected to the crossbeam 3, or the main body is installed on the crossbeam 3, and the output end extends into the second fixed seat 22, etc. The rotating device 33 generally consists of a motor, bearings, bearing housings, etc. Because the rotating device 33 is located close to the column 21... One end of column 31 is relatively far away, especially for large milling machines, where the span of crossbeam 3 exceeds two meters. Therefore, after the locking block 34 disengages from the locking slot 35, the rotating device 33 needs to withstand very large stress. That is, the magnitude and direction of the force on the position near and far from the end of crossbeam 3 are different. In this embodiment, a counterweight is provided at the end of crossbeam 3 near the rotating device 33 to counteract the downward force at the other end of crossbeam 3, so that the force on the rotating device 33 is balanced. In this embodiment, the counterweight can be a large metal block or a high-strength counterweight plate 32. Since the metal block is very heavy and difficult to install, it will swing due to inertia during rotation, causing the crossbeam 3 to be unstable and prone to falling. Therefore, it is preferable to use counterweight plate 32 as the counterweight component. Of course, the counterweight plate 32 is provided with several reinforcing ribs to ensure that it will not deform. A pulley 36 is provided at the end of the counterweight plate 32, and the pulley 36 cooperates with the arc-shaped limiting groove 23.

[0024] When the rotating block 34 of the crossbeam 3 disengages from the slot 35, the end of the crossbeam 3 will generate a downward force with a downward tendency, using the rotating device 33 as the fulcrum, while the other end will have an upward tendency. However, the pulley 36 and the arc-shaped limiting groove 23 still cooperate to limit the position of the other end of the crossbeam 3, and at the same time apply a pulling force equal to gravity to make the crossbeam 3 reach balance. At the same time, the various positions of the rotating device 33 will reach the optimal balanced force, thereby enabling the crossbeam 3 to open and close stably and extending its service life.

[0025] In the prior art, there is no locking structure between the locking block 34 and the locking slot 35. If the rotating device 33 needs to continuously apply a pushing force to keep the crossbeam 3 from shifting after the crossbeam 3 is reset, the motor will be in a stalled state, which will shorten the service life of the motor. In this embodiment, the auxiliary cylinder 43 is used to apply a continuous pushing force to the crossbeam 3 to keep it in a locked state. At this time, the rotating device 33 can be closed to avoid stalling.

[0026] More specifically, a fixing plate 41 is installed on the second fixing seat 22. The fixing plate 41 is rotatably connected to one end of the auxiliary cylinder 43 through the first connecting piece 42. The other end of the auxiliary cylinder 43 is rotatably connected to the side wall of the crossbeam 3 through the second connecting piece 44. When the rotating device 33 drives the crossbeam 3 to rotate, the auxiliary cylinder 43 can move relatively through the first connecting piece 42 and the second connecting piece 44 without hindering the rotation process of the crossbeam 3.

[0027] In another embodiment, since the crossbeam 3 is very heavy, the rotating device 33 requires a large torque to start. However, after driving the crossbeam 3 to move, the inertia will cause it to swing at a large angle, making it impossible to brake. Therefore, when the crossbeam 3 needs to be opened, the rotating device 33 starts, and at the same time, the auxiliary cylinder 43 retracts to provide auxiliary force. That is, a smaller motor can be used to drive the crossbeam 3 to move. Secondly, after the cylinder retracts to the end of its stroke, it will resist the crossbeam 3 and thus restrict its further rotation, that is, restrict its range of motion. Similarly, when the crossbeam 3 needs to be reset, the auxiliary cylinder 43 can provide auxiliary force to make it easier to move.

[0028] In addition, the auxiliary cylinder 43 can be set on either side, but the extension and retraction of the auxiliary cylinder 43 will vary depending on the setting position. In this embodiment, the extension direction of the auxiliary cylinder 43 matches the engagement direction of the locking block 34. That is, when the auxiliary cylinder 43 is in the extended state, the locking block 34 engages with the locking groove 35 to provide locking force, while when the auxiliary cylinder 43 is in the retracted state, the auxiliary rotating device 33 opens the crossbeam 3.

[0029] In this embodiment of the utility model, the crossbeam 3 is provided with a plurality of mounting positions 37, which are used to install clamping components 381. The number of mounting positions 37 is greater than or equal to the number of clamping components 381. The number of clamping components 381 can be increased or decreased according to the processing of different products, thus providing greater flexibility.

[0030] Preferably, a number of clamping components 381 are arranged in a cross shape at the middle position of the crossbeam 3, and other clamping components 381 are installed along the extension direction of the crossbeam 3, so that its application range is wider.

[0031] In this embodiment of the utility model, the workbench 1 includes a base 11, a rotary motor 12 is mounted on the base 11, and a turntable pad 15 is mounted on the output end of the rotary motor 12. The workpiece is placed on the turntable pad 15 and is connected to the output end of the clamping component 381 corresponding to the turntable pad 15 via a movable part 382 to rotate a pressure rod 383. Preferably, a pressure plate is provided at the output end of the pressure rod 383. When the clamping component 381 pushes out the pressure rod 383 to cooperate with the turntable pad 15 to clamp the workpiece, when it is necessary to adjust the workpiece, the rotary motor 12 drives the pressure rod 383 and the turntable pad 15 to rotate synchronously.

[0032] A secondary operating platform 13 is installed on both sides of the rotary motor 12, and at least one secondary operating platform 13 is fixed with a pad 14 to accommodate different workpiece placement needs.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A machine tool gantry opening and closing structure characterized by comprising: It includes a workbench (1), on which a first fixed seat (21), a second fixed seat (22) and an arc-shaped limiting groove (23) are respectively provided; A crossbeam (3) is provided on the workbench (1). The two ends of the crossbeam (3) are respectively provided with a column (31) and a counterweight plate (32). A rotating device (33) is installed near the counterweight plate (32). The end of the column (31) is provided with a locking block (34). The locking block (34) can be engaged with the open slot (35) on the first fixed seat (21). The end of the counterweight plate (32) is provided with a pulley (36) that rotates. The pulley (36) cooperates with the arc-shaped limiting groove (23). The other end of the rotating device (33) is installed on the second fixed seat (22).

2. The opening and closing structure of a machine tool gantry according to claim 1, characterized in that: A fixing plate (41) is installed on the second fixing seat (22). The fixing plate (41) is rotatably connected to one end of the auxiliary cylinder (43) through the first connecting piece (42). The other end of the auxiliary cylinder (43) is rotatably connected to the side wall of the crossbeam (3) through the second connecting piece (44).

3. The opening and closing structure of a machine tool gantry according to claim 2, characterized in that: The extension direction of the auxiliary cylinder (43) matches the engagement direction of the locking block (34).

4. The machine tool gantry opening and closing structure according to claim 1, characterized in that: The crossbeam (3) is provided with a number of mounting positions (37), which are used to install clamping components (381). The number of mounting positions (37) is greater than or equal to the number of clamping components (381).

5. The opening and closing structure of a machine tool gantry according to claim 1, characterized in that: The workbench (1) includes a base (11) on which a rotary motor (12) is mounted. A turntable pad (15) is mounted on the output end of the rotary motor (12). One of the pressing components (381) corresponds to the turntable pad (15) and is rotatably connected to a pressure rod (383) at its output end via a movable part (382).

6. The opening and closing structure of a machine tool gantry according to claim 5, characterized in that: A secondary control panel (13) is installed on both sides of the rotary motor (12), and a pad (14) is fixed on at least one of the secondary control panels (13).

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