Intelligent tool changing device of machining center

Abstract

The invention relates to an intelligent tool changing device of a machining center, which comprises a tool changing manipulator, the tool changing manipulator is fixedly connected with the tail end of a main shaft, a bearing cover is arranged at the tail end of the outer side of a rack of the main shaft, the tool changing manipulator is provided with an ejector rod, and the ejector rod is in sliding connection with a main body part of the tool changing manipulator. The top end of the ejector rod can clamp the tool apron after penetrating out of the main body part of the tool changing manipulator, the ejector rod is driven by a connecting rod device to be in sliding connection with the main body part of the tool changing manipulator, the connecting rod device rotates through a poking device, and the poking device is fixedly arranged at the bottom of the bearing cover. According to the intelligent tool changing device of the machining center, the ejector rod is driven by the connecting rod device, stretching and retracting of the ejector rod are achieved by removing a spring, and therefore the problem that the elastic force of the spring is weakened is avoided.

Description

Technical Field

[0001] This invention relates to a machine tool, specifically to an intelligent tool changer for a machining center. Background Technology

[0002] The tool changer in a machining center works by issuing commands from the control system to drive the tool magazine, tool changer, machine spindle, and other components to work together automatically to change tools. Specifically, when a tool change is needed, the control system commands the tool magazine to rotate to a designated position. The tool changer then retrieves the required tool from the magazine and transports it to the machine spindle. Simultaneously, the control system signals the machine spindle to stop and remove the old tool. Finally, the tool changer installs the new tool onto the machine spindle and signals it to restart, completing the tool change process.

[0003] As can be seen, the tool changing robot is a key device in machining centers for automatically changing tools, and the tool changing robot usually achieves movement and rotation through motors, cylinders or other driving devices.

[0004] In existing technologies, the gripping part of a tool-changing robot typically has a push rod that holds the tool holder in place. However, the push rod in existing technologies usually uses a spring to achieve its retraction function. Over time, the spring can deform, weakening its elasticity and causing the tool holder to detach during the gripping process. Summary of the Invention

[0005] The main objective of this invention is to provide an intelligent tool changer for machining centers, which uses a linkage device to drive a push rod and eliminates the need for a spring to extend and retract the push rod, thereby avoiding the problem of weakened spring force.

[0006] To achieve the above objectives, the present invention provides an intelligent tool changer for a machining center, including a tool changer robot. The tool changer robot is fixedly connected to the end of a spindle. A bearing cover is provided at the outer end of the spindle frame. The tool changer robot is provided with a push rod, which is slidably connected to the main body of the tool changer robot. The top end of the push rod protrudes from the main body of the tool changer robot and can lock the tool holder. The push rod is driven to slidably connect to the main body of the tool changer robot via a linkage device. The linkage device is rotated by a toggle device, which is fixedly installed at the bottom of the bearing cover.

[0007] Preferably, the actuating device includes a mounting bracket, a mounting plate, two inner levers, and two outer levers. One end of the mounting bracket is fixedly installed below the bearing cover, and the other end of the mounting bracket is fixedly connected to the mounting plate. The mounting plate is sleeved on the outside of the spindle. The inner levers and outer levers are respectively fixedly installed below the mounting plate, and the bottoms of the inner levers and outer levers can actuate the linkage device. The projections of the central axes of the inner levers and outer levers onto the mounting plate are on different radii.

[0008] In a further preferred embodiment, a cover plate is provided above the push rod, and the cover plate is fixedly connected to the main body of the tool changing robot by bolts. A groove is formed between the cover plate and the main body of the tool changing robot, and the push rod slides in the groove.

[0009] More preferably, the linkage device is rotatably positioned above the cover plate.

[0010] More preferably, a locking pin is provided at one end of the groove near the main shaft, which can fix and push out the top of the push rod.

[0011] More preferably, the locking pin includes a base, a central shaft, and a roller. The base is fixedly installed at the bottom of the main body of the tool changing robot. One end of the central shaft is fixedly connected to the base, and the other end of the central shaft extends out of the main body of the tool changing robot. The roller is sleeved on the outside of the central shaft. The linkage device can actuate the roller to rotate, and the roller can push out the push rod.

[0012] More preferably, the roller has a placement groove on the side facing the groove, and the tail end of the top rod can slide into and out of the placement groove.

[0013] More preferably, the linkage device includes a first linkage, a rotating seat, and a second linkage. The middle part of the first linkage is rotatably connected to the rotating seat, which is fixedly mounted on the cover plate. One end of the first linkage is rotatably connected to one end of the second linkage, and the other end of the second linkage is rotatably connected to the top of the roller. Both the inner lever and the outer lever can actuate the first linkage to rotate, and the second linkage can drive the roller to rotate.

[0014] More preferably, the top of the roller is provided with a waist-shaped groove, and a sliding column is slidably provided in the waist-shaped groove. The top of the sliding column is rotatably connected to the other end of the second connecting rod.

[0015] Even more preferably, the top of the push rod is a rubber head.

[0016] The beneficial effects of this invention are as follows: This invention incorporates a linkage device in the main body of a tool-changing robot and a levering device on the bearing cover connected to the robot. During the robot's rotation, the lever is activated by the fixed levering device, enabling the extension and retraction of the push rod. This design avoids deformation of the elastic component during use, preventing the tool holder from detaching due to the push rod not extending during the robot's gripping process. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of the tool changing device of the present invention; Figure 2 This is a schematic diagram of the tool-changing robot of the present invention; Figure 3 This is a schematic diagram of the cover plate of the tool changing robot of the present invention; Figure 4 This is a schematic diagram of the push rod structure of the tool changing robot of the present invention; Figure 5 A schematic diagram of the locking pin structure of the tool changing robot of the present invention.

[0019] Explanation of reference numerals in the attached figures 100. Tool changing robot; 110. Top rod; 111. Rubber head; 120. Cover plate; 130. Locking pin; 131. Central shaft; 132. Roller; 1321. Waist-shaped groove; 1322. Placement slot; 133. Base; 200. Actuating device; 210. Mounting plate; 211. Inner lever; 212. Outer lever; 300. Linkage device; 310. Second link; 320. First link; 321. Inner plate; 322. Outer panel; 330. Rotary seat. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] like Figure 1 and Figure 2As shown, this embodiment provides an intelligent tool changer for a machining center, including a tool changer 100. The tool changer 100 is driven by a motor and cylinder located above it. The tool changer 100 is fixedly installed at the end of the aforementioned drive spindle, and a bearing cover is provided at the end of the spindle. The bearing cover does not rotate with the spindle. A telescopic push rod 110 is provided at the gripping point of the tool changer 100. The push rod 110 is slidably connected to the main body of the tool changer 100. When the gripper grips the tool holder, the top end of the push rod 110 can abut against and lock onto the outside of the tool holder, thereby preventing the tool holder from detaching from the gripper.

[0022] In this embodiment, the push rod 110 does not use a traditional spring to realize the extension and retraction function of the push rod 110. Specifically, the push rod 110 is slidably connected to the main body of the tool changing robot 100 through the linkage device 300. The linkage device 300 is rotated by the actuating device 200, which is fixedly installed at the bottom of the bearing cover.

[0023] Specifically, in this embodiment, such as Figures 1 to 3 As shown, the actuating device 200 includes a mounting bracket, a mounting plate 210, two inner levers 211, and two outer levers 212. One end of the mounting bracket is fixedly installed below the bearing cover, and the other end of the mounting bracket is fixedly connected to the mounting plate 210. The mounting plate 210 is sleeved on the outside of the main shaft. The inner levers 211 and outer levers 212 are respectively fixedly installed below the mounting plate 210, and the bottoms of the inner levers 211 and outer levers 212 can actuate the linkage device 300. In this embodiment, the inner levers 211 and outer levers 212 of the same group are staggered, that is, the projections of the central axis 131 of the inner levers 211 and outer levers 212 onto the mounting plate 210 are on different radii.

[0024] In this embodiment, a cover plate 120 is provided above the push rod 110. The cover plate 120 is fixedly connected to the main body of the tool changing robot 100 by bolts. A groove is formed between the cover plate 120 and the main body of the tool changing robot 100, and the push rod 110 slides within the groove. A locking pin 130 is provided at one end of the groove near the main shaft, which can fix and push out the top of the push rod 110. Specifically, as shown... Figure 3 and Figure 5As shown, the locking pin 130 includes a base 133, a central shaft 131, and a roller 132. The base 133 is fixedly installed at the bottom of the main body of the tool changing robot 100. One end of the central shaft 131 is fixedly connected to the base 133, and the other end of the central shaft 131 extends out of the main body of the tool changing robot 100. The roller 132 is sleeved on the outside of the central shaft 131. The linkage device 300 can move the roller 132 to rotate around the central shaft 131, and the roller 132 can push out the push rod 110. A placement groove 1322 is provided on the side of the roller 132 facing the groove. The tail end of the push rod 110 can slide into and out of the placement groove 1322. When the tool holder needs to be removed, the placement groove 1322 is aligned with the groove. Thus, when the machine tool spindle removes the tool holder and drives it away from the gripper, it will force the push rod 110 to slide inward, thereby allowing the tail end of the push rod 110 to insert into the placement groove 1322. When the tool holder needs to be changed, the drive spindle rotates the tool changing robot 100. During rotation, the inner lever 211 actuates the linkage device 300. After the gripper picks up the tool holder, the inner lever 211 actuates the linkage device 300, causing the roller 132 to rotate completely. The rotation of the roller 132 then pushes the tail end of the push rod 110 out of the placement groove 1322, causing the top end of the push rod 110 to abut against the outside of the tool holder. In other words, as the tool holder rotates into the gripper, before it is fully inside the gripper, the push rod 110 gradually extends. Once the tool holder is fully inside the gripper, the push rod 110 is fully extended.

[0025] In this embodiment, as Figure 2 and Figure 3 As shown, the linkage device 300 is rotatably mounted above the cover plate 120. Specifically, the linkage device 300 includes a first linkage 320, a rotating seat 330, and a second linkage 310. The middle part of the first linkage 320 is rotatably connected to the rotating seat 330, which is fixedly mounted on the cover plate 120. One end of the first linkage 320 is rotatably connected to one end of the second linkage 310, and the other end of the second linkage 310 is rotatably connected to the top of the roller 132. Both the inner lever 211 and the outer lever 212 can actuate the first linkage 320 to rotate, and the second linkage 310 can drive the roller 132 to rotate. Meanwhile, the top of the roller 132 is provided with a waist-shaped groove 1321, and a sliding column is slidably mounted within the waist-shaped groove 1321. The top end of the sliding column is rotatably connected to the other end of the second linkage 310. In addition, an inner plate 321 and an outer plate 322 are respectively provided on the top of the first link 320. The inner lever 211 and the outer lever 212 complete the rotation of the first link 320 by moving the inner plate 321 and the outer plate 322 respectively.

[0026] In this embodiment, as described above, the top end of the push rod 110 is pressed against the outside of the tool holder by compression. Therefore, in order to prevent the push rod 110 from damaging the outer wall of the tool holder, the top end of the push rod 110 is set as a hard rubber head 111.

[0027] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. An intelligent tool changer for a machining center, comprising a tool changing robot arm, the tool changing robot arm being fixedly connected to the end of a spindle, a bearing cap being provided at the outer end of the spindle frame, the tool changing robot arm being provided with a push rod, the push rod being slidably connected to the main body of the tool changing robot arm, the top end of the push rod protruding from the main body of the tool changing robot arm and capable of locking a tool holder, characterized in that, The push rod is slidably connected to the main body of the tool changing robot via a linkage device. The linkage device is rotated by a toggle device, which is fixedly installed at the bottom of the bearing cover.

2. The intelligent tool changer for a machining center according to claim 1, characterized in that, The actuating device includes a mounting bracket, a mounting plate, two inner levers, and two outer levers. One end of the mounting bracket is fixedly installed below the bearing cover, and the other end of the mounting bracket is fixedly connected to the mounting plate. The mounting plate is sleeved on the outside of the main shaft. The inner levers and the outer levers are respectively fixedly installed below the mounting plate, and the bottoms of the inner levers and the outer levers can actuate the linkage device. The projections of the central axes of the inner levers and the outer levers onto the mounting plate are at different radii.

3. The intelligent tool changer for a machining center according to claim 2, characterized in that, A cover plate is provided above the top rod. The cover plate is fixedly connected to the main body of the tool changing robot by bolts. A groove is formed between the cover plate and the main body of the tool changing robot, and the top rod slides in the groove.

4. The intelligent tool changer for a machining center according to claim 3, characterized in that, The connecting rod device is rotatably positioned above the cover plate.

5. The intelligent tool changer for a machining center according to claim 4, characterized in that, A locking pin is provided at one end of the groove near the main shaft, which can fix and push out the top of the push rod.

6. The intelligent tool changer for a machining center according to claim 5, characterized in that, The locking pin includes a base, a central shaft, and a roller. The base is fixedly installed at the bottom of the main body of the tool changing robot. One end of the central shaft is fixedly connected to the base, and the other end of the central shaft extends out of the main body of the tool changing robot. The roller is sleeved on the outside of the central shaft. The linkage device can rotate the roller, and the roller can push out the push rod.

7. The intelligent tool changer for a machining center according to claim 6, characterized in that, The roller has a placement slot on the side facing the groove, and the tail end of the top rod can slide into and out of the placement slot.

8. The intelligent tool changer for a machining center according to claim 7, characterized in that, The linkage device includes a first link, a rotating seat, and a second link. The middle part of the first link is rotatably connected to the rotating seat, which is fixedly mounted on the cover plate. One end of the first link is rotatably connected to one end of the second link, and the other end of the second link is rotatably connected to the top of the roller. Both the inner lever and the outer lever can actuate the first link to rotate, and the second link can drive the roller to rotate.

9. The intelligent tool changer for a machining center according to claim 8, characterized in that, The top of the roller is provided with a waist-shaped groove, and a sliding column is slidably arranged in the waist-shaped groove. The top end of the sliding column is rotatably connected to the other end of the second connecting rod.

10. The intelligent tool changer for a machining center according to claim 9, characterized in that, The top end of the push rod is a rubber head.

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