Shank lock sleeve and tool magazine

Abstract

The present invention discloses a shank lock sleeve and a tool magazine, which includes a tool sleeve, a pull claw, an elastic member and a pin shaft, and a shank receiving cavity is provided in the tool sleeve, a shank mounting port is provided at one end of the shank receiving cavity, and a pull claw mounting part is provided at the other end. The pull claw includes a shank engaging part and a pull claw driving part, a shank engaging surface is provided at the shank engaging part, the pull claw is hingedly connected to the pull claw mounting part, and the elastic member is connected to the pull claw and the tool sleeve, and after the shank is inserted into the shank receiving cavity, the driving pull claw of the elastic member makes the shank engaging part engage with the inner diameter of the shank to realize the engagement between the shank engaging surface and the inner diameter of the shank. When an external force drives the pull claw driving part to rotate the pull claw around the pin shaft, the shank engaging part is separated from the inner diameter of the shank. The shank lock sleeve disclosed in the present invention has the advantages of a large locking force and a reliable locking, and is used to lock a relatively heavy tool, and at the same time has the advantages of a simple structure.

Description

[Technical field]

[0001] The present invention relates to the technical field of tool magazines for numerically controlled machine tools, and in particular to a shank lock sleeve and a tool magazine. [Background technology]

[0002] The shank lock sleeves used in current tool magazines generally have a steel ball in the tool sleeve that is pressed against the inner wall of the shank by a spring to lock the shank, and the locking force is large. The shank is removed only by the ATC manipulator, but because the locking force is large, the ATC tool change mechanism deforms after a certain period of time, its accuracy deteriorates quickly, and tool jamming problems are likely to occur, requiring maintenance at regular intervals. The deformation of the ATC tool change arm causes the tool change point to shift, and the shank frequently hits the inner hole of the spindle during tool change, causing damage to the inner hole of the spindle, reducing the accuracy of the spindle, and increasing the maintenance costs of the spindle. When manually installing a tool, it is necessary to apply force to install the shank into the tool sleeve, which is very time-consuming. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a shank lock sleeve.

[0004] The technical solutions adopted in the present invention are as follows:

[0005] A shank lock sleeve including a tool sleeve, a pull tab, an elastic member, and a pin shaft, A shank receiving cavity is provided within the tool sleeve, a shank mounting port is provided at one end of the shank receiving cavity for inserting or extracting a shank, and a pull claw mounting portion is provided at the other end of the shank receiving cavity for mounting a pull claw; One end of the pull claw is a shank engaging portion, and the other end of the pull claw is a pull claw drive portion, the shank engaging portion is provided with a shank engaging surface, the pull claw is hingedly connected to the pull claw mounting portion via the pin shaft, and the shank engaging portion is disposed inside the shank receiving cavity, and the pull claw drive portion is disposed outside the shank receiving cavity; The elastic member is connected to the pull claw and the pull claw mounting portion, and after the shank is inserted into the shank receiving cavity through the shank mounting port, the restoring force of the elastic member drives the pull claw to rotate around the pin axis, and the shank engaging portion engages with the inner diameter of the shank, thereby realizing the engagement between the shank engaging surface and the inner diameter of the shank; When an external force drives the pawl driver to rotate the pawl about the pin axis, the shank engagement portion disengages from the inner diameter of the shank.

[0006] Furthermore, the tool sleeve has a sleeve structure with one open end and the other blind end, the one open end being a shank mounting port and the other blind end being a pull-claw mounting portion, the pull-claw mounting portion being provided with a pull-claw mounting opening, the pull-claw being disposed in the pull-claw mounting opening and being hingedly connected to the blind end.

[0007] Furthermore, the angle between the shank engagement portion and the pull claw drive portion is 90° or less, and a pull claw connection portion is provided between the angle between the shank engagement portion and the pull claw drive portion, and the pull claw connection portion is hingedly connected to the pull claw mounting portion via the pin shaft.

[0008] Furthermore, the side of the shank attachment portion facing the pull claw connection portion is a pull claw stopper portion, and a stopper opening is provided in the pull claw stopper portion, and when the pull claw is positioned in the pull claw mounting opening and attached to the pull claw mounting portion, the stopper opening engages with the blind end wall of the tool sleeve.

[0009] Furthermore, the length of the pawl drive portion is greater than the length of the shank engagement portion.

[0010] Furthermore, a guide surface is further provided at the end of the shank engaging portion.

[0011] Furthermore, a shank positioning key is fixed to one end adjacent to the pull-claw mounting portion within the shank accommodating cavity, and after the shank is inserted into the shank accommodating cavity from the shank mounting port, the shank positioning key is inserted into the high key groove of the shank.

[0012] Furthermore, a cylindrical pin is fixed to one end adjacent to the pulling claw mounting portion in the shank accommodating cavity, and the cylindrical pin is installed opposite the shank positioning key. After the shank is inserted into the shank accommodating cavity from the shank mounting port, the cylindrical pin is positioned in the low key groove of the shank and contacts the bottom surface of the low key groove.

[0013] The present invention discloses a tool magazine including a tool magazine disk, a cylinder drive mechanism, a pull-claw drive device, and the shank lock sleeve, wherein the cylinder drive mechanism is attached to the tool magazine disk, the tool magazine disk is provided with a plurality of tool sleeve mounting holes, tool sleeves are attached to the tool mounting holes, a pull-claw drive device is fixed to an end of the cylinder drive mechanism, the cylinder drive mechanism drives the pull-claw drive device to move it to each tool sleeve mounting hole to drive the pull-claw, and the pull-claw drive device drives the pull-claw to rotate it.

[0014] Furthermore, the claw drive device includes a cylinder and a pinch roller mounted on an output shaft of the cylinder, the pinch roller being hingedly connected to the output shaft of the cylinder.

[0015] Compared with the prior art, the shank lock sleeve disclosed in the present invention has the following advantageous effects: the shank lock sleeve structure disclosed in the present invention has a tool sleeve, a pull tab and an elastic member, which form a lever structure and clamp the shank from inside the shank, and has the advantages of a large locking force and reliable locking, which can be used to lock relatively heavy tools, and at the same time has the advantages of a simple structure. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is an axonometric projection view of the shank lock sleeve disclosed in the present invention. [Diagram 2] FIG. 2 is a front view of the shank lock sleeve disclosed in the present invention. [Diagram 3] FIG. 2 is a plan view of a shank lock sleeve disclosed in the present invention. [Figure 4] FIG. 2 is a bottom view of the shank lock sleeve disclosed in the present invention. [Diagram 5] FIG. 2 is a front view of a tool sleeve disclosed in the present invention. [Figure 6] FIG. 2 is a plan view of a tool sleeve disclosed in the present invention. [Figure 7] 1 is a cross-sectional view of a tool sleeve disclosed in the present invention. [Figure 8] FIG. 2 is an axonometric view of a tool sleeve disclosed in the present invention. [Figure 9] FIG. 2 is a structural diagram of a pull claw disclosed in the present invention. [Figure 10] FIG. 2 is a front view of the shank lock sleeve disclosed in the present invention after it is connected to the shank. [Figure 11] FIG. 2 is a partial cross-sectional view of the shank lock sleeve of the present invention after it has been connected to the shank. [Figure 12] FIG. 12 is a partially enlarged view of the portion enclosed by the dashed line in FIG. [Figure 13] FIG. 2 is a partial cross-sectional view of the shank lock sleeve disclosed in the present invention after it has been connected to the shank, showing the cross-section from the cylindrical pin and shank positioning key. [Figure 14] 1 is a structural diagram of a tool magazine having a shank lock sleeve disclosed in the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] 1, 2, 3 and 4 show a shank lock sleeve including a tool sleeve 1, a pulling claw 2, an elastic member 3 and a pin shaft 4 according to the present invention.

[0018] As shown in Figures 5, 6, 7 and 8, a shank-accommodating cavity 10 is provided in the tool sleeve 1, and the shank-accommodating cavity has a conical cavity structure that fits with the shank. One end of the shank-accommodating cavity 10 is provided with a shank mounting port 11 for inserting or extracting the shank 7, and the other end of the shank-accommodating cavity 10 is provided with a pulling claw mounting part 12 for mounting the pulling claw 2. Specifically, in this embodiment, the tool sleeve 1 has a sleeve structure with one end being an open end and the other end being a blind end, the one end as the open end being the shank mounting port 11 and the other end as the blind end being the pulling claw mounting part 12, and the pulling claw mounting part 12 is provided with a pulling claw mounting opening 13, and the pulling claw 2 is disposed in the pulling claw mounting opening 13 and is hingedly connected to the blind end.

[0019] As shown in FIG. 9, one end of the pull claw 2 is a shank engaging portion 20, and the other end of the pull claw 2 is a pull claw drive portion 21. The shank engaging portion 20 is provided with a shank engaging surface 22. The pull claw 2 is hinged to the pull claw mounting portion 12 via the pin shaft 4. The shank engaging portion 20 is disposed inside the shank receiving cavity 10, and the pull claw drive portion 21 is disposed outside the shank receiving cavity 10. Specifically, in this embodiment, the pull claw 2 is a curved steel plate structure, and the two sides of the steel plate are the shank engaging portion 20 and the pull claw drive portion 21, respectively. The shank engaging portion 22 is provided with a shank engaging surface 22. The pull claw 2 is hinged to the pull claw mounting portion 12 via the pin shaft 4. The shank engaging portion 20 is disposed inside the shank receiving cavity 10, and the pull claw drive portion 21 is disposed outside the shank receiving cavity 10. 20 and the pull claw drive part 21 are not more than 90°, preferably, the angle between the shank engagement part 20 and the pull claw drive part 21 is 90°, and an outwardly protruding pull claw connection part 23 is provided between the angle between the shank engagement part 20 and the pull claw drive part 21, and a notch 14 is provided on each side of the pull claw mounting part 12 on the outer edge of the blind end of the tool sleeve 1, as shown in Figures 6, 7 and 8, and a support tab 15 is formed between the pull claw mounting part 12 and the notch 14, and a through hole is provided in the pull claw connection part 23, and the pull claw connection part 23 is hingedly connected to the support tab 15 via the pin shaft 4.

[0020] The elastic member 3 is connected to the pull claw 2 and the pull claw mounting part 12. After the shank 7 is inserted into the shank receiving cavity 10 through the shank mounting port 11, the restoring force of the elastic member 3 drives the pull claw 2 to rotate around the pin axis 4, and the shank engaging part 20 engages with the inner diameter of the shank 7, thereby realizing the engagement between the shank engaging surface 22 and the inner diameter of the shank 7. Specifically, in this embodiment, as shown in Figures 1, 2 and 3, the elastic member 3 is a tension spring, and one tension spring is provided on each side of the pull claw 2. One end of the tension spring is fixed to the pull claw mounting part 12 (the outer end wall of the blind end of the tool sleeve) by a screw 32, and the other end of the tension spring is fixed to the pull claw 2 by a nut 31 and a screw 30.

[0021] When an external force drives the pull claw drive unit 21 to rotate the pull claw 2 around the pin shaft 4, the shank engagement unit 20 is separated from the inner diameter of the shank 7; specifically, in this embodiment, a pull claw drive unit 5 is adopted to drive and move the pull claw 2, and the pull claw drive unit 5 can drive the pull claw drive unit 21 to rotate the pull claw 2 around the pin shaft 4, so that the shank engagement unit 20 is separated from the inner diameter of the shank 7; in this embodiment, the pull claw drive unit 5 includes a cylinder 50 and a pinch roller 51 installed on the output shaft of the cylinder 50, the output shaft of the cylinder is installed along a direction perpendicular to the blind end surface of the tool sleeve, and the pinch roller 51 is hingedly connected to the output shaft of the cylinder 50.

[0022] As shown in Figures 10 and 11, when the shank is inserted into the shank accommodating cavity through the shank mounting port, the side wall of the shank can be inserted into the gap between the shank engaging portion and the inner diameter of the tool sleeve, so that the shank engaging portion extends to the inner diameter of the shank, a slope is provided on the inner diameter of the shank, the shank engaging surface abuts the slope on the inner diameter of the shank, and the shank engaging portion tightens the inner diameter of the shank under the action of the tensile force of the elastic member to clamp the shank. The shank lock sleeve disclosed in the present application clamps the shank from inside the shank under the action of the tensile force of the spring, which has the advantages of a large locking force and reliable locking, and can be used to lock tools that are relatively heavy. At the same time, it has the advantages of a simple structure, and this structure has the advantages of high reliability, a long maintenance cycle, and less damage to the inner hole wall of the spindle, etc.

[0023] Furthermore, the side of the shank engaging part 20 facing the pull claw connecting part 23 is a pull claw stopper part 24, which is provided with a stopper opening 25, and when the pull claw 2 is disposed in the pull claw mounting opening 13 and attached to the pull claw mounting part 12, the stopper opening 25 is engaged with the blind end wall of the tool sleeve 1. Due to the provision of the stopper opening, in the process of the cylinder driving and rotating the pull claw through the pinch roller, the direction of rotation is indicated by the arrow A in FIG. 12, and the side wall surface of the stopper opening located in the shank receiving cavity can abut against the inner wall surface 16 of the blind end, thereby realizing the positional restriction on the rotation of the pull claw, which can easily realize the separation of the shank and the tool sleeve, and improve the efficiency of separation of the shank and the tool sleeve.

[0024] Furthermore, the length of the pull claw drive portion 21 is longer than the length of the shank attachment portion 20, so that the pull claws can be driven and separated with a small driving force due to the lever structure, and a cylinder with a smaller model number can be used, saving costs. At the same time, in terms of the tensile force of the elastic member, due to the principle of leverage, a large locking force can be obtained at the shank attachment portion with a small tensile force of the tension spring, so that the shank lock sleeve disclosed in the present invention can obtain a large locking force.

[0025] Furthermore, as shown in Figure 9, a guide surface 27 is further provided at the end of the shank mounting portion 20. In this embodiment, the guide surface is an arc-shaped surface installed at the end of the shank mounting portion. Due to the guide surface, the gap between the shank mounting portion and the inner diameter of the tool sleeve gradually narrows from one end to the other end of the shank mounting port, which makes it easier to guide the shank during insertion and to insert the shank between the shank mounting portion and the inner wall of the tool sleeve.

[0026] 13, a shank positioning key 60 is further fixed to one end of the shank accommodating cavity 10 adjacent to the pulling claw mounting portion 12. After the shank 7 is inserted into the shank accommodating cavity 10 through the shank mounting port 11, the shank positioning key 60 is inserted into the high key groove 70 of the shank 7. Specifically, a shank positioning key mounting groove 62 is provided on the outer wall of one end of the pulling claw mounting portion of the tool sleeve 1, and the shank positioning key 60 is fixed into the shank positioning key mounting groove 62 by a screw, with a part of the shank positioning key extending into the shank accommodating cavity. The installation of the shank positioning key can ensure the accuracy of inserting the shank into the tool sleeve. That is, when the shank is inserted into the tool sleeve, the shank positioning key 60 is inserted into the high key groove of the shank to determine the direction of the cutting edge of the shank.

[0027] Furthermore, a cylindrical pin 61 is fixed to one end of the shank receiving cavity 10 adjacent to the pulling claw mounting portion 12, and the cylindrical pin 61 is installed opposite the shank positioning key 60. After the shank 7 is inserted into the shank receiving cavity 10 from the shank mounting port 11, the cylindrical pin 61 is disposed in the low key groove 71 of the shank 7 and contacts the bottom surface of the low key groove 71. Specifically, a cylindrical pin is attached to the outer wall of one end of the pulling claw mounting portion of the tool sleeve 1 on the side opposite the shank positioning key mounting groove. A recess 63 is provided, a cylindrical pin is mounted in the cylindrical pin mounting hole 63, and the cylindrical pin is mounted on the opposite side of the shank positioning key so that the cylindrical pin comes into contact with the bottom surface of the low key groove of the shank and the cylindrical pin serves to prevent the shank from being mounted in the high key and low key direction reversed; that is, if the shank is mounted in the high key groove and low key groove in the reversed direction, the bottom surface of the high key groove of the shank will interfere with the cylindrical pin, and the shank will not be mounted in the designated position, and the shank mounting will not be completed, thus serving to alert the operator.

[0028] FIG. 14 shows a tool magazine disclosed in the present invention, including a tool magazine disk 80, a cylinder drive mechanism 82 and the shank lock sleeve disclosed in the present invention, the cylinder drive mechanism 82 is attached to the tool magazine disk 80, the tool magazine disk 80 is provided with a plurality of tool sleeve mounting holes 81, the tool sleeve 1 is attached to the tool sleeve mounting holes 81, the claw drive mechanism 5 is fixed to the end of the cylinder drive mechanism 82, the cylinder drive mechanism 82 drives the claw drive mechanism 5 to move to the position of each tool sleeve mounting hole 81, and can drive the claw. In this embodiment, the figure shows a circular tool magazine disk, the cylinder drive mechanism is attached to the center of the circular tool magazine disk, the cylinder drive mechanism can be rotated by the drive of a drive device such as a motor, the claw drive mechanism 5 is provided at the end of the cylinder drive mechanism, the claw drive mechanism can be moved to the position of each tool sleeve mounting hole by rotating the cylinder drive mechanism, and the claw drive mechanism can realize the separation of the shank and the tool sleeve by driving the claw at the corresponding position.

[0029] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent replacements or modifications made by those skilled in the art based on the technical solutions and inventive concepts of the present invention within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. [Explanation of symbols]

[0030] 1 Tool Sleeve 10 Shank Receiving Cavity 11 Shank mounting port 12 Claw attachment part 13 Claw mounting opening 14 Cutting 15 Support tab 16 Inner wall surface of blind end of tool sleeve 2 pull jaw, 20 shank attachment part 21 Claw drive unit 22, shank attachment surface 23 Claw connection 24 Claw stopper part 25 Stopper opening 26 Stopper surface 27 Guide Surface 3 Elastic member 30 Screw 31 Nut 32 Screws 4 pin shaft 5. Claw drive mechanism 50 cylinders 51 Pinch roller 60 Shank positioning key 61 Cylinder Pin 7 Shank 70 high keyway 71 Low key groove 80 Tool magazine disk 81 Tool sleeve mounting hole 82 Cylinder drive mechanism

Claims

1. A shank lock sleeve including a tool sleeve, a pull tab, an elastic member, and a pin shaft, A shank receiving cavity is provided within the tool sleeve, a shank mounting port is provided at one end of the shank receiving cavity for inserting or extracting a shank, and a pull claw mounting portion is provided at the other end of the shank receiving cavity for mounting a pull claw; One end of the pull claw is a shank engaging portion, and the other end of the pull claw is a pull claw drive portion, the shank engaging portion is provided with a shank engaging surface, the pull claw is hingedly connected to the pull claw mounting portion via the pin shaft, and the shank engaging portion is disposed inside the shank receiving cavity, and the pull claw drive portion is disposed outside the shank receiving cavity; The elastic member is connected to the pull claw and the pull claw mounting portion, and after the shank is inserted into the shank receiving cavity through the shank mounting port, the restoring force of the elastic member drives the pull claw to rotate around the pin axis, and the shank engaging portion engages with the inner diameter of the shank, thereby realizing the engagement between the shank engaging surface and the inner diameter of the shank; When an external force drives the pull-claw drive portion to rotate the pull-claw about the pin axis, the shank engagement portion separates from the inner diameter of the shank.

2. 2. The shank lock sleeve according to claim 1, characterized in that the tool sleeve has a sleeve structure with one open end and the other blind end, the open end being a shank mounting port and the blind end being a pull-claw mounting portion, the pull-claw mounting portion being provided with a pull-claw mounting opening, the pull-claw being disposed in the pull-claw mounting opening and being hingedly connected to the blind end.

3. 3. The shank lock sleeve of claim 2, wherein an included angle between the shank engagement portion and the pull pawl drive portion is 90° or less, a pull pawl connection portion is provided between the included angle between the shank engagement portion and the pull pawl drive portion, and the pull pawl connection portion is hingedly connected to the pull pawl mounting portion via the pin shaft.

4. 4. The shank lock sleeve according to claim 3, characterized in that the side of the shank engagement portion facing the pull claw connection portion is a pull claw stopper portion, the pull claw stopper portion is provided with a stopper opening, and when the pull claw is disposed in the pull claw mounting opening and attached to the pull claw mounting portion, the stopper opening engages with the blind end wall of the tool sleeve.

5. The shank lock sleeve according to any one of claims 1 to 4, characterized in that the length of the pull-claw drive portion is longer than the length of the shank engagement portion.

6. The shank lock sleeve according to claim 5 , further comprising a guide surface at an end of the shank engaging portion.

7. The shank lock sleeve according to claim 1, further comprising a shank positioning key fixed to one end adjacent to the pull-claw mounting portion in the shank accommodating cavity, and after the shank is inserted into the shank accommodating cavity through the shank mounting port, the shank positioning key is inserted into the high key groove of the shank.

8. The shank lock sleeve of claim 7, further comprising a cylindrical pin fixed to one end adjacent to the pull-claw mounting portion in the shank accommodating cavity, the cylindrical pin being installed opposite the shank positioning key, and after the shank is inserted into the shank accommodating cavity through the shank mounting port, the cylindrical pin is positioned in the low key groove of the shank and contacts the bottom surface of the low key groove.

9. Tool magazine disk, cylinder drive mechanism, claw drive device and the shank lock sleeve according to any one of claims 1 to 8, a cylinder drive mechanism attached to the tool magazine disk, the tool magazine disk being provided with a plurality of tool sleeve mounting holes, tool sleeves being attached to the tool mounting holes, a pull-claw drive device fixed to an end of the cylinder drive mechanism, the cylinder drive mechanism driving the pull-claw drive device to move it to each tool sleeve mounting hole to drive the pull-claw, and the pull-claw drive device driving the pull-claw to rotate it.

10. 10. The tool magazine according to claim 9, wherein the claw drive device includes a cylinder and a pinch roller mounted on an output shaft of the cylinder, the pinch roller being hingedly connected to the output shaft of the cylinder.

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