Tool changing mechanism of vertical machining center

Abstract

The utility model discloses a vertical machining center tool changing mechanism, which relates to the technical field of tool changing equipment and comprises a shell, the shell is arranged between a tool magazine and a machining shaft, an air cylinder is fixedly connected to the top end in the shell, a supporting mechanism is arranged at the output end of the air cylinder, a rotating mechanism is arranged on the supporting mechanism, and a clamping mechanism is arranged at the lower end of the rotating mechanism. The clamping mechanism comprises a clamping supporting frame, a rotating block is rotationally connected into the clamping supporting frame, telescopic rods are fixed to the two sides of the rotating block, the telescopic rods are rotationally connected with connecting rods, the connecting rods are slidably connected with limiting blocks, and clamping hands are fixed to the two ends of the clamping supporting frame. The tool changing device has the beneficial effects that through the arrangement of the clamping mechanism, a limiting block does not contract in the clockwise rotation process of the clamping mechanism, limiting on a tool is kept, after tool changing is completed, the clamping mechanism rotates anticlockwise to enable the limiting block to contract, limiting on the clamping mechanism is finished, and therefore the clamping effect is better in the tool changing process; and the risk that the cutter falls off is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tool changing equipment, in particular to a tool changing mechanism for a vertical machining center. Background Art

[0002] A vertical machining center is a highly automated multifunctional CNC machine tool with a tool magazine and an automatic tool changing device. A vertical machining center generally uses a tool changing mechanism to store and replace milling cutters.

[0003] For example, the patent document with the announcement number CN221337706U discloses a tool changing mechanism of a machining center, including a tool changing arm and a tool changing disc, as well as a power assembly, a screw and a nut seat. The tool changing disc is located below the tool changing arm, the nut seat is screwed onto the screw, and the tool changing arm is fixedly installed on the nut seat. A first guide rail, two limit plates, and a second guide rail are respectively provided along the screw from top to bottom. The first guide rail and the second guide rail are respectively located on both sides of the screw, and the two limit plates are respectively fixedly connected to the first guide rail and the second guide rail; a limit part is provided on one side of the nut seat, and the power assembly drives the screw to rotate. In the prior art, when the tool changing mechanism changes the tool, a spring plus an isosceles trapezoidal limit block is used to limit the clamping of the tool. Although this clamping method is convenient for clamping and unclamping the tool, it still has the risk of unstable clamping and causing the prop to fall. Utility Model Content

[0004] The purpose of the utility model is to provide a tool changing mechanism for a vertical machining center in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A tool changing mechanism for a vertical machining center comprises a shell, which is arranged between a tool magazine and a machining axis, a cylinder is fixedly connected to the top end of the shell, a supporting mechanism is arranged at the output end of the cylinder, a rotating mechanism is arranged on the supporting mechanism, a clamping mechanism is arranged at the lower end of the rotating mechanism, the clamping mechanism comprises a clamping support frame, a rotating block is rotatably connected to the center of the clamping support frame, symmetrically arranged telescopic rods are fixedly connected to both sides of the rotating block, the other end of the telescopic rod is rotatably connected to a connecting rod, the connecting rod is slidably connected to the clamping support frame, the other end of the connecting rod is fixedly connected to a spring, the other end of the spring is fixedly connected to a limiting block, the limiting block is slidably connected to the connecting rod, and symmetrically arranged clamping hands are fixedly connected to both ends of the clamping support frame.

[0007] Preferably, the support mechanism includes a rotating support frame fixedly connected to the output end of the cylinder, the rotating support frame is slidably connected to the outer shell, the middle part of the rotating support frame is fixedly connected to a motor, the output end of the motor is fixedly connected to a driving gear, and the driving gear is rotatably connected to the rotating support frame.

[0008] Preferably, the rotating mechanism includes a rotating shaft rotatably connected to the rotating support frame, a rotating platform fixedly connected to the middle of the rotating shaft, an outer arc rack fixedly connected to the rotating platform, the outer arc rack sleeved on the rotating shaft, an inner arc rack fixedly connected to the rotating platform, an arc-shaped notch is provided on the outer arc rack, the notch positions of the inner arc rack and the outer arc rack correspond and the radian is equal, the outer arc rack and the inner arc rack can engage with the driving gear, the upper end of the rotating shaft is fixedly connected to the trigger block, and the lower end of the rotating shaft is fixedly connected to the rotating block.

[0009] Preferably, a symmetrically arranged switch is installed on the upper part of the rotating support frame, and the switch is electrically connected to the cylinder.

[0010] Preferably, a groove for clamping the tool is provided in the clamping hand.

[0011] Preferably, the curvature of the outer arc rack is set to 270°, the curvature of the inner arc rack is set to 90°, the outer arc rack teeth face outward, and the inner arc rack teeth face inward.

[0012] The beneficial effect is that: through the setting of the clamping mechanism, the limit block will not shrink during the clockwise rotation of the clamping mechanism, thereby maintaining the limit on the tool. After the tool is replaced, the clamping mechanism rotates counterclockwise to shrink the limit block, ending the limit on the clamping mechanism. In this way, the clamping effect is better during the tool change process, reducing the risk of the tool falling.

[0013] Additional technical features and advantages of the present invention will be more clearly explained in the following description, or can be understood through specific practice of the present invention. 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 following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a three-dimensional diagram of a tool changing mechanism for a vertical machining center described in the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of a tool changing mechanism for a vertical machining center described in the utility model;

[0017] Figure 3 This is a schematic structural diagram of a support mechanism for a tool changing mechanism of a vertical machining center described in the utility model;

[0018] Figure 4 This is a schematic diagram of the rotary mechanism of the tool changing mechanism of a vertical machining center described in the utility model;

[0019] Figure 5It is a top sectional view of a clamping mechanism of a tool changing mechanism of a vertical machining center described in the utility model.

[0020] The following are the descriptions of the reference numerals:

[0021] 1. Housing; 2. Cylinder; 301. Rotating support frame; 302. Switch; 303. Motor; 304. Driving gear; 401. Rotating platform; 402. Rotating shaft; 403. Trigger block; 404. Outer arc rack; 405. Inner arc rack; 501. Clamping support frame; 502. Rotating block; 503. Telescopic rod; 504. Connecting rod; 505. Spring; 506. Limit block; 507. Clamping hand. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figure 1-Figure 5As shown, a tool changing mechanism of a vertical machining center includes a shell 1, which is arranged between the tool magazine and the machining axis, a cylinder 2 is fixedly connected to the top of the shell 1, a supporting mechanism is provided at the output end of the cylinder 2, a rotating mechanism is provided on the supporting mechanism, a clamping mechanism is provided at the lower end of the rotating mechanism, and the clamping mechanism includes a clamping support frame 501, a rotating block 502 is rotatably connected to the center of the clamping support frame 501, and symmetrically arranged telescopic rods 503 are fixedly connected on both sides of the rotating block 502, and the other end of the telescopic rod 503 is rotatably connected to a connecting rod 504, and the connecting rod 504 is slidably connected to the clamping support frame 501, and the other end of the connecting rod 504 is fixedly connected to a spring 505, and the other end of the spring 505 is fixedly connected to a limiting block 506, and the limiting block 506 is slidably connected to the connecting rod 504. The clamping hand 507 is provided with a groove for clamping the tool. The rotation of the rotating shaft 402 drives the rotating block 502 to rotate. The rotation of the rotating block 502 drives the telescopic rod 503 to move. The movement of the telescopic rod 503 drives the connecting rod 504 to move. Since the clamping support frame 501 has a limiting effect on the connecting rod 504, the clamping support frame 501 rotates with the rotation of the rotating block 502, and the clamping mechanism rotates to clamp the tool magazine and the tool on the processing axis. When the tool enters the clamping hand 507, the limit block 506 is forced to move into the connecting rod 504. At this time, the spring 505 contracts. After the tool enters the clamping hand 507, the spring 505 drives the limit block 506 to reset. In this way, the limit block 506 limits the tool. When the clamping of the tool is cancelled, the rotating block 502 is reversed, driving the connecting rod 504 to contract, thus canceling the limit on the tool.

[0026] The supporting mechanism includes a rotating support frame 301 fixedly connected to the output end of the cylinder 2, the rotating support frame 301 is slidably connected to the outer shell 1, a motor 303 is fixedly connected to the middle part of the rotating support frame 301, and a driving gear 304 is fixedly connected to the output end of the motor 303. The driving gear 304 is rotatably connected to the rotating support frame 301. A symmetrically arranged switch 302 is installed on the upper part of the rotating support frame 301. The switch 302 is electrically connected to the cylinder 2. The rotation of the motor 303 drives the driving gear 304 to rotate, and the rotation of the driving gear 304 drives the rotating shaft 402. During the rotation of the rotating shaft 402, the trigger block 403 triggers the switch 302, and the switch 302 transmits an electrical signal to the cylinder 2. The output end of the cylinder 2 is extended and retracted to drive the rotating support frame 301 to move vertically.

[0027] The rotating mechanism includes a rotating shaft 402 rotatably connected to the rotating support frame 301, a rotating platform 401 is fixedly connected to the middle of the rotating shaft 402, an outer arc rack 404 is fixedly connected to the rotating platform 401, the outer arc rack 404 is sleeved on the rotating shaft 402, an inner arc rack 405 is fixedly connected to the rotating platform 401, an arc-shaped notch is provided on the outer arc rack 404, the inner arc rack 405 corresponds to the notch position of the outer arc rack 404 and the arc is equal, the outer arc rack 404 and the inner arc rack 405 can mesh with the driving gear 304, and the upper end of the rotating shaft 402 is fixedly connected to the trigger block 4 03. The lower end of the rotating shaft 402 is fixedly connected to the rotating block 502. The curvature of the outer arc rack 404 is set to 270°, and the curvature of the inner arc rack 405 is set to 90°. The teeth of the outer arc rack 404 face outward, and the teeth of the inner arc rack 405 face inward. The driving gear 304 rotates to drive the outer arc rack 404 to rotate, and the rotation of the outer arc rack 404 drives the rotating platform 401 to rotate clockwise. After rotating 270°, the driving gear 304 disengages from the outer arc rack 404, and the driving gear 304 starts to engage with the inner arc rack 405, causing the rotating platform 401 to rotate counterclockwise, so that the tool changing mechanism returns to its position.

[0028] Working principle: The tool changing mechanism starts, the motor 303 rotates, the motor 303 rotates and drives the driving gear 304 to rotate, the driving gear 304 rotates, drives the outer arc rack 404 to rotate, the outer arc rack 404 rotates and drives the rotating platform 401 to rotate clockwise, the rotating platform 401 rotates and drives the rotating shaft 402 to rotate, the rotating shaft 402 rotates and drives the rotating block 502 to rotate, the rotating block 502 rotates and drives the telescopic rod 503 to move, the telescopic rod 503 moves and drives the connecting rod 504 to move, due to the clamping The support frame 501 has a limiting effect on the connecting rod 504. The clamping support frame 501 rotates with the rotation block 502, causing the clamping mechanism to rotate 90 degrees, clamping the tool to be replaced in the tool magazine and on the processing axis. When the tool enters the clamping hand 507, the limit block 506 is forced to move into the connecting rod 504. At this time, the spring 505 contracts. After the tool enters the clamping hand 507, the spring 505 drives the limit block 506 to reset. In this way, the limit block 506 limits the tool. At this time, the rotation of the rotating shaft 402 drives The trigger block 403 rotates, and the trigger block 403 touches the switch 302. The switch 302 transmits an electrical signal to the cylinder 2, and the cylinder 2 starts, so that the rotating support frame 301 moves downward, so that the clamped tool is separated from the tool magazine and the processing axis. The motor 303 continues to rotate, so that the clamping mechanism continues to rotate 180 degrees clockwise, and the positions of the two tools on the clamping mechanism are exchanged. At this time, the trigger block 403 touches the switch 302 again, and the cylinder 2 contracts, driving the rotating support frame 301 to move upward, so that the two tools move upward. The movement is clamped by the tool magazine and the machining axis respectively, the motor 303 continues to rotate, the driving gear 304 and the inner arc rack 405 enter into meshing, driving the rotating platform 401 to rotate counterclockwise, causing the rotating shaft 402 to rotate 90° counterclockwise. During this process, the rotating shaft 402 drives the rotating block 502 to rotate, and the rotation of the rotating block 502 drives the connecting rod 504 to move inward, canceling the limit of the tool by the limit block 506. After rotating 90° counterclockwise, the tool changing mechanism is reset, and the tool changing work of the vertical machining center is completed.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A tool changing mechanism for a vertical machining center, comprising a housing (1), characterized in that: The housing (1) is arranged between the tool magazine and the processing axis, the top end of the housing (1) is fixedly connected to a cylinder (2), the output end of the cylinder (2) is provided with a support mechanism, the support mechanism is provided with a rotating mechanism, the lower end of the rotating mechanism is provided with a clamping mechanism, the clamping mechanism comprises a clamping support frame (501), the center of the clamping support frame (501) is rotatably connected to a rotating block (502), and both sides of the rotating block (502) are fixedly connected to symmetrically arranged telescopic rods (5 03), the other end of the telescopic rod (503) is rotatably connected to a connecting rod (504), the connecting rod (504) is slidably connected to the clamping support frame (501), the other end of the connecting rod (504) is fixedly connected to a spring (505), the other end of the spring (505) is fixedly connected to a limit block (506), the limit block (506) is slidably connected to the connecting rod (504), and the two ends of the clamping support frame (501) are fixedly connected to symmetrically arranged clamping hands (507).

2. A tool changing mechanism for a vertical machining center according to claim 1, characterized in that: The support mechanism comprises a rotating support frame (301) fixedly connected to the output end of the cylinder (2), the rotating support frame (301) being slidably connected to the housing (1), a motor (303) being fixedly connected to the middle of the rotating support frame (301), a driving gear (304) being fixedly connected to the output end of the motor (303), and the driving gear (304) being rotatably connected to the rotating support frame (301).

3. The tool changing mechanism of a vertical machining center according to claim 2, characterized in that: The rotating mechanism comprises a rotating shaft (402) rotatably connected to the rotating support frame (301); a rotating platform (401) is fixedly connected to the middle of the rotating shaft (402); an outer arc rack (404) is fixedly connected to the rotating platform (401); the outer arc rack (404) is sleeved on the rotating shaft (402); an inner arc rack (405) is fixedly connected to the rotating platform (401); an arc-shaped notch is provided on the outer arc rack (404); the inner arc rack (405) corresponds to the notch position of the outer arc rack (404) and has the same arc; the outer arc rack (404) and the inner arc rack (405) are capable of meshing with the driving gear (304); a trigger block (403) is fixedly connected to the upper end of the rotating shaft (402); and the lower end of the rotating shaft (402) is fixedly connected to the rotating block (502).

4. The tool changing mechanism of a vertical machining center according to claim 2, characterized in that: A symmetrically arranged switch (302) is installed on the upper portion of the rotating support frame (301), and the switch (302) is electrically connected to the cylinder (2).

5. The tool changing mechanism of a vertical machining center according to claim 1, characterized in that: The clamping hand (507) is provided with a groove for clamping a tool.

6. The tool changing mechanism of a vertical machining center according to claim 3, characterized in that: The curvature of the outer arc rack (404) is set to 270°, the curvature of the inner arc rack (405) is set to 90°, the teeth of the outer arc rack (404) face outward, and the teeth of the inner arc rack (405) face inward.

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