Lifting mechanism of CNC (computer numerical control) milling machine

Abstract

The utility model belongs to the technical field of machine tools, and particularly relates to a CNC (computer numerical control) milling machine lifting mechanism which comprises a mounting base, a lifting mechanism arranged on the upper surface of the mounting base, an operating table arranged at the top end of the lifting mechanism, a plurality of first sleeves uniformly and vertically arranged on the side edge of the lower surface of the operating table, and guide rods slidably arranged in the first sleeves. The bottom ends of the guide rods are fixedly connected with the mounting base, a limiting device is arranged between at least one guide rod and the first sleeve, and the limiting device comprises a pressing rod and a pressing mechanism which are detachably arranged at the bottom ends of the sleeves. Due to the arrangement of the limiting device, when the operation table suddenly descends, the falling stopping effect can be achieved, danger caused by falling of the operation table can be prevented, meanwhile, the distance between the pressing piece and the guide rod and the extending distance of the first screw rod can be accurately set, and the effect of limiting the height of the operation table is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tools, and in particular relates to a lifting mechanism for a CNC numerically controlled milling machine. Background Art

[0002] CNC milling machine is an automatic processing equipment developed on the basis of general milling machine. The processing technology of the two is basically the same, and the structure is somewhat similar. CNC milling machine can be divided into two categories: without tool magazine and with tool magazine. Among them, CNC milling machine with tool magazine is also called machining center.

[0003] Chinese patent CN218294977U discloses a universal lifting platform milling machine lifting and positioning mechanism, including a milling machine body, a lifting seat and a supporting base, and relates to the technical field of milling machines. The utility model universal lifting platform milling machine lifting and positioning mechanism drives the linkage disk to rotate through a built-in motor, and the linkage disk drives the threaded column to rotate while rotating, and the threaded column drives the lifting sleeve to rise on the threaded column when rotating, and the lifting sleeve drives the milling machine body to rise through the reinforcing rod, and the limit support rod rotates on the central axis through the rotating ring, so that the limit support rod leaves the inside of the side limit groove, and the main column is lifted until the top of the main column contacts the bottom of the milling machine body, and the limit support rod is rotated back to the limit groove to keep the position of the main column fixed, so that the main column supports the milling machine body, and the structure can effectively control the lifting and lowering of the milling machine table, and cooperate with the milling cutter to accurately process the workpiece.

[0004] Although the above technical solution can control the lifting of the milling machine table, the design of the limit support rod in the limit groove cannot achieve accurate control of the lifting height. Utility Model Content

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] The cam is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves, each of which is provided with a plurality of sleeves,

[0007] Preferably, the lifting mechanism includes a vertically arranged driving motor, the output end of the driving motor is provided with a second screw, the upper end of the second screw is sleeved with a second sleeve, the top of the second sleeve is fixedly connected to the operating table, the interior of the second sleeve is provided with an internal thread, and the second screw is threadedly connected to the second sleeve.

[0008] Preferably, a driving bevel gear is provided at the output end of the driving motor, and a plurality of driving shafts are evenly distributed around the driving motor through a rotating shaft seat, and a first driven bevel gear and a second driven bevel gear are respectively provided at both ends of the driving shaft, the first driven bevel gear is meshed with the driving bevel gear, the second driven bevel gear is meshed with the third driven bevel gear, and the third driven bevel gear is arranged on a vertically arranged screw rod 2, and the lower end of the screw rod 2 is rotatably connected to the mounting base.

[0009] Preferably, an anti-slip pad is provided on the outward side of the pressing sheet.

[0010] Preferably, a handle is provided at an upper end of the screw rod.

[0011] Preferably, a mounting plate is provided at the upper end of the pressure rod, a connecting ring is provided at the other end of the mounting plate, a limiting ring is fixedly provided at the lower part of the sleeve, the connecting ring is sleeved on the sleeve and contacts with the lower end of the limiting ring.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model is provided with sleeve 1 and guide rod, and the guide rod slides in sleeve 1, so that the up and down movement of the operating table is more stable, and the operating table is prevented from tilting. The setting of the limit device of the utility model can play a role in stopping the operating table from falling suddenly to prevent it from falling and causing danger. At the same time, the distance between the pressing sheet and the guide rod and the extension distance of the screw rod 1 can also be accurately set to limit the height of the operating table. In addition, the detachable setting of the limit device of the utility model allows it to be flexibly set, suitable for operating tables of different specifications, and has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the local structure at A;

[0017] Figure 3 This is a schematic diagram of the overall structure of the second embodiment of the utility model;

[0018] Figure 4 for Figure 3 Schematic diagram of the local structure at location B. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] like Figure 1 , 2As shown, this embodiment provides the following technical solutions: a CNC milling machine lifting mechanism, comprising, a mounting base 1, a lifting mechanism is arranged on the upper surface of the mounting base 1, an operating table 2 is arranged on the top of the lifting mechanism, four corners of the lower surface of the operating table 2 are respectively vertically provided with sleeves 3, a guide rod 4 is slidably arranged in the sleeve 3, the bottom end of the guide rod 4 is fixedly connected to the mounting base 1, a limiting device is arranged between one of the guide rods 4 and the sleeve 3, the limiting device comprises a pressure rod 5 and a clamping mechanism detachably arranged at the bottom end of the sleeve, a mounting plate 5-1 is arranged on the upper end of the pressure rod 5, a connecting ring 5-2 is arranged on the other end of the mounting plate 5-1, a limiting ring 5-3 is fixedly arranged at the lower part of the sleeve 3, the connecting ring 5-2 is sleeved on the sleeve 3 and contacts with the lower end of the limiting ring 5-3, and the bottom end of the sleeve 3 is threadedly connected with an end cover 5-4. The clamping mechanism includes a chassis 6, on which a sleeve three 7 is vertically arranged. A screw rod 8 is threadedly connected to the sleeve three 7. A sleeve four 9 is rotatably arranged on the top of the screw rod 8. A sliding rod 13 is slidably arranged in the sleeve four 9. An adjusting tube 10 is threadedly connected to one end of the sliding rod 13 facing the guide rod 4. A connecting rod one 11 is threadedly connected to the other end of the adjusting tube 10. A pressing plate 12 is rotatably arranged on the other end of the connecting rod one 11. A connecting rod two 14 is rotatably arranged on the other end of the sliding rod 13. The other end of the connecting rod two 14 is rotatably connected to the lower end of the pressing rod 5.

[0023] In this embodiment, the lifting mechanism includes a vertically arranged driving motor 15, and a screw rod 16 is arranged at the output end of the driving motor 15. The upper end of the screw rod 16 is sleeved with a sleeve 17, and the top of the sleeve 17 is fixedly connected to the operating table 2. The sleeve 17 is provided with an internal thread, and the screw rod 16 is threadedly connected to the sleeve 17.

[0024] In order to increase the friction between the pressing piece 12 and the guide rod 4 , an anti-slip pad 18 is provided on the outward side of the pressing piece 12 .

[0025] In order to facilitate the adjustment of the height of the sleeve 29 9, a handle 19 is provided at the upper end of the screw rod 8.

[0026] The working principle of the above technical solution is:

[0027] When in use, the first step is to control the output end of the driving motor 15 to rotate through the controller, driving the screw rod 16 to rotate, thereby adjusting the height of the operating table 2. The second step is to move the limit device to the side of the guide rod 4 provided with the limit ring 5-3, rotate the screw rod 1 8, adjust the height of the sleeve 3 7, and connect the pressure rod 5 to one end of the connecting rod 2 14. The connection method is as follows: Figure 2The third step is to rotate the adjusting tube 10 to adjust the extension length of the connecting rod 1 11 so that the distance between the pressing plate 12 and the guide rod 4 is small. When the operating table 2 moves downward, the pressing rod 5 pushes the connecting rod 2 14 to move downward, and the connecting rod 2 14 pushes the sliding rod 13 to move the guide rod 4, so that the pressing plate 12 and the guide rod 4 collide with each other, thereby preventing the pressing rod 5 from continuing to move downward.

[0028] Compared with the prior art, the beneficial effects of the utility model are:

[0029] In the present invention, the setting of the sleeve 13 and the guide rod 4, and the sliding of the guide rod 4 in the sleeve 13 make the up and down movement of the operating platform 2 more stable, and prevent the operating platform 2 from tilting. The setting of the limit device of the present invention can play a role in stopping the operating platform 2 from falling suddenly to prevent it from falling and causing danger. At the same time, the distance between the pressing sheet 12 and the guide rod 4 and the extension distance of the screw rod 18 can also be accurately set to limit the height of the operating platform 2. In addition, the detachable setting of the limit device of the present invention allows it to be flexibly set and is suitable for operating platforms 2 of different specifications, with good applicability. Example

[0030] like Figure 3 and Figure 4 As shown, on the basis of embodiment 1, in this embodiment, the output end of the driving motor 15 is provided with a driving bevel gear 20, and two driving shafts 22 are evenly distributed on the periphery of the driving motor 15 through a rotating shaft seat 21, and the first driven bevel gear 23 and the second driven bevel gear 24 are respectively provided at both ends of the driving shaft 22. The first driven bevel gear 23 is meshed with the driving bevel gear 20, and the second driven bevel gear 24 is meshed with the third driven bevel gear 25. The third driven bevel gear 25 is arranged on a vertically arranged screw rod 16, and the lower end of the screw rod 16 is rotatably connected to the mounting base 1, and the upper end of the screw rod 16 is sleeved with a sleeve 17, and the top of the sleeve 17 is fixedly connected to the operating table 2, and the sleeve 17 is provided with an internal thread, and the screw rod 16 and the sleeve 17 are threadedly connected.

[0031] The working principle and beneficial effects of the above technical solution are:

[0032] When in use, the driving motor 15 drives the active bevel gear 20 to rotate, the active bevel gear 20 drives the first driven bevel gear 23 to rotate, the first driven bevel gear 23 drives the driving shaft 22 and the second driven bevel gear 24 to rotate, the second driven bevel gear 24 drives the third driven bevel gear 25 and the screw rod 16 to rotate, thereby controlling the lifting of the operating platform 2. In this embodiment, the stability of the lifting action of the operating platform 2 can be increased by rotating the two screw rods 16 that rotate synchronously.

[0033] The above are only preferred specific implementations of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A CNC milling machine lifting mechanism, characterized in that: The invention comprises a mounting base (1), wherein a lifting mechanism is arranged on the upper surface of the mounting base (1), an operating table (2) is arranged on the top of the lifting mechanism, a plurality of sleeves (3) are evenly and vertically arranged on the side of the lower surface of the operating table (2), a guide rod (4) is slidably arranged in the sleeve (3), the bottom end of the guide rod (4) is fixedly connected to the mounting base (1), and a limiting device is arranged between at least one guide rod (4) and the sleeve (3), wherein the limiting device comprises a pressure rod (5) detachably arranged at the bottom end of the sleeve and a pressing mechanism, wherein the pressing mechanism comprises a chassis (6), a vertical A sleeve three (7) is provided in a straight line, the sleeve three (7) is internally threadedly connected with a screw rod one (8), the top of the screw rod one (8) is rotatably provided with a sleeve four (9) arranged transversely, a sliding rod (13) is slidably provided in the sleeve four (9), one end of which is threadedly connected to an adjusting tube (10) toward the guide rod (4), the other end of the adjusting tube (10) is threadedly connected to a connecting rod one (11), the other end of the connecting rod one (11) is rotatably provided with a pressing plate (12), the other end of the sliding rod (13) is rotatably provided with a connecting rod two (14), and the other end of the connecting rod two (14) is rotatably connected to the lower end of the pressing rod (5).

2. A CNC milling machine lifting mechanism according to claim 1, characterized in that: The lifting mechanism comprises a vertically arranged driving motor (15), the output end of the driving motor (15) is provided with a second screw rod (16), the upper end of the second screw rod (16) is sleeved with a second sleeve (17), the top of the second sleeve (17) is fixedly connected to the operating table (2), the interior of the second sleeve (17) is provided with an internal thread, and the second screw rod (16) and the second sleeve (17) are threadedly connected.

3. A CNC milling machine lifting mechanism according to claim 2, characterized in that: The output end of the drive motor (15) is provided with a driving bevel gear (20), and a plurality of drive shafts (22) are evenly distributed around the circumference of the drive motor (15) through a rotating shaft seat (21). A first driven bevel gear (23) and a second driven bevel gear (24) are respectively provided at both ends of the drive shaft (22). The first driven bevel gear (23) is meshed with the driving bevel gear (20), and the second driven bevel gear (24) is meshed with the third driven bevel gear (25). The third driven bevel gear (25) is arranged on a vertically arranged second screw rod (16), and the lower end of the second screw rod (16) is rotatably connected to the mounting base (1).

4. The CNC milling machine lifting mechanism according to claim 1, characterized in that: An anti-slip pad (18) is provided on the outward side of the pressing sheet (12).

5. The CNC milling machine lifting mechanism according to claim 1, characterized in that: A handle (19) is provided at the upper end of the screw rod 1 (8).

6. The CNC milling machine lifting mechanism according to claim 1, characterized in that: The upper end of the pressure rod (5) is provided with a mounting plate (5-1), and the other end of the mounting plate (5-1) is provided with a connecting ring (5-2). A limiting ring (5-3) is fixedly provided at the lower part of the sleeve one (3). The connecting ring (5-2) is sleeved on the sleeve one (3) and is in contact with the lower end of the limiting ring (5-3).

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