Tool pouch of tool holder for processing machine

Abstract

The utility model discloses a cutter sleeve of a cutter holder for a processing machine. The cutter sleeve for the processing machine comprises a cutter sleeve body, a cutter locking device and a positioning block, wherein the knife pouch body is provided with a sleeve hole for a taper shank of a knife handle to insert; the cutter locking device is used for providing a radial force for the taper shank inserted into the sleeving hole; the positioning block is provided with a positioning part which is exposed in the sleeving hole in a protruding mode, and the positioning part is embedded in the positioning groove of the knife handle, so that the knife handle cannot rotate relative to the knife pouch body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a storage structure of a tool holder for a compound processing machine, in particular to a tool holder for a processing machine. BACKGROUND

[0002] A tool holder or tool bar for a known processing machine is a bridge between a machine tool spindle and a tool. In a computer-controlled processing program, in order to successfully implement processing operations such as drilling, milling, boring, turning, etc., the tool attached to the tool holder is different. Common tools include milling cutters, reamers, boring tools, reverse reamers, and turning inserts, etc. In order to achieve compound processing requirements, the processing machine is equipped with a tool magazine and a tool changing mechanism. The tool magazine provides multiple tool holders for multiple tool holders to be inserted therein, and each tool holder is attached to a different tool. The tool changing mechanism is used to quickly exchange the tool holder (together with the tool) placed in the tool magazine and on the machine tool spindle to improve work efficiency.

[0003] In order to ensure processing accuracy, the tool setting point (or workpiece origin) must be selected before processing in order to follow the tool setting program. The tool setting program refers to the coincidence of the tool setting point and the tool position point. The purpose is to determine the absolute coordinate value of the tool setting point in the tool machine coordinate system, which is used to measure the tool position deviation value. The tool setting point is the starting point of the tool relative to the workpiece during the machining of the numerical control machine tool. The tool setting point can be set on the workpiece, fixture, or machine tool. The tool position point refers to the positioning reference point of the tool. Taking a turning insert as an example, the tool position point is at the tool tip. As can be seen from the foregoing, in an automated processing program, the tool position point is extremely important, and the tool position points of different tools are set according to different processing programs. Therefore, in order to ensure that the tool position points of each tool in the tool magazine can remain at the pre-set position, so that the tool changing mechanism can take out the correct tool, the existing method is to make a tool holder body of the tool holder in multiple ways, thereby providing a tool holder for inserting different tools and obtaining positioning to achieve the purpose of stabilizing the tool position point. However, this method increases the manufacturing cost of the tool holder body, especially when the tool holder body is made by injection molding, multiple special molds are required to make the aforementioned multiple tool holder bodies, which increases the cost. SUMMARY

[0004] Therefore, the purpose of the utility model is to provide a tool holder for a processing machine, wherein the tool holder can stably store the tool holder and prevent the tool holder from rotating improperly.

[0005] To achieve the above object, the utility model provides a knife sleeve for processing machine with a knife handle, the knife handle has a taper handle, the taper handle has an end face and an outer circumferential surface, the knife handle has a positioning groove at the connecting part of the end face and the outer circumferential surface, the knife sleeve includes a sleeve body, a lock knife device and a positioning block. The sleeve body has a sleeve hole and defines a virtual axis through the center of the sleeve hole, the sleeve hole is used for inserting the taper handle of the knife handle, the lock knife device is used to provide a radial force for the taper handle inserted into the sleeve hole, the positioning block is fixed to the sleeve body and has a positioning part exposed in the sleeve hole. Therefore, when the taper handle of the knife handle is inserted into the sleeve hole, the positioning part of the positioning block is embedded in the positioning groove of the knife handle, and the knife handle cannot rotate relative to the sleeve body with the axis as the center. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 It is the perspective view of the knife sleeve and the knife handle of a preferred embodiment of the utility model;

[0007] Figure 2 It is the exploded view of the knife sleeve for processing machine of the above preferred embodiment of the utility model;

[0008] Figure 3 It is the sectional view of the sleeve body in the above Figure 2

[0009] It is the sectional view of the sleeve body in the above Figure 4 Figure 3 It is the sectional view of the sleeve body in the above

[0010] Figure 5 Figure 3 It is the sectional view of the sleeve body in the above

[0011] Figure 6 It is the sectional view of the sleeve body in the above Figure 1

[0012] Figure 7 It is the sectional view of the sleeve body in the above Figure 6

[0013] Figure 8 It is the sectional view of the sleeve body in the above Figure 7

[0014] It is the sectional view of the sleeve body in the above Figure 9 Figure 7 It is the sectional view of the sleeve body in the above

[0015] Figure 10 It is the perspective view of the injection mold for manufacturing a sleeve body of a preferred embodiment of the utility model;

[0016] Figure 11 Figure 10 ​​​​​​Another perspective view of the injection mold shown;

[0017] Figure 12 For Figure 10 A simplified view of the mold base in the injection mold shown;

[0018] Figure 13 For Figure 10 A schematic view of the injection mold in a closed state shown;

[0019] Figure 14 For Figure 13 A schematic view of the injection mold in a closed state shown;

[0020] Figure 15 Like Figure 10 , the first slider and the second slider in the injection mold are turned ninety degrees;

[0021] Figure 16 Like Figure 9 , the positioning block is located above;

[0022] Figure 17 Like Figure 9 , the positioning block is located on the right side;

[0023] Figure 18 Like Figure 9 , the positioning block is located below.

[0024]

Symbol Description

[0025] 100: Knife sheath

[0026] 10, 10A, 10B, 10C: Knife sheath body

[0027] 10a: Top end

[0028] 10b: Bottom end

[0029] 12: Partition wall

[0030] 12a: Axial hole

[0031] 12b: Radial hole

[0032] 12c: Mounting hole

[0033] 12d: Through hole

[0034] 14: Socket hole

[0035] 14a: Inner convex part

[0036] 14b: Concave part

[0037] 16: Stop surface

[0038] 20: positioning block

[0039] 22: positioning portion

[0040] 30: lock device

[0041] 31: shaft tube

[0042] 31a: side opening

[0043] 31b: barrier

[0044] 32: steel ball

[0045] 33: unlocking member

[0046] 33a: pushing portion

[0047] 33b: screw hole

[0048] 34: spring

[0049] 35: screw

[0050] 36: gasket

[0051] 37: blocking piece

[0052] 37a: perforation

[0053] 38: bolt

[0054] 200: handle

[0055] 201: taper shank

[0056] 201a: end face

[0057] 201b: outer peripheral surface

[0058] 201c: outer convex portion

[0059] 202: shaft hole

[0060] 203: annular groove

[0061] 204: positioning groove

[0062] 300: injection mold

[0063] 301: first opening

[0064] 302: second opening

[0065] 303: injection port

[0066] 310: forming mold base

[0067] 311: first mold half

[0068] 311a: mold parting surface

[0069] 311b: Inner surface

[0070] 312: Second half mold

[0071] 312a: Parting surface

[0072] 312b: Inner surface

[0073] 320: First slider

[0074] 321: first end surface

[0075] 322: Parting column

[0076] 330: Second slider

[0077] 331: Cone

[0078] 332: outer surface

[0079] 333: Second end face

[0080] 334: Middle column

[0081] 335: Extension column

[0082] L: axis

[0083] L1: Baseline

[0084] L2: vertical line

[0085] P1: Not inserted position

[0086] P2: Insertion position

[0087] S: Cavity

[0088] T: contact point

[0089] W: Spacing DETAILED DESCRIPTION

[0090] In view of the different positions of the tool positions of different tools, the tool holder provided by the utility model can not only produce a good positioning effect for the stored tool handle, but also one of its components, the tool holder body, has a positioning structure through the processing of an injection mold. The positioning structure provides a positioning block setting that can be used to prevent the tool handle from rotating, so as to ensure that the tool position of the tool fixed to the tool handle remains in the set position, which is convenient for a subsequent tool changing mechanism to use according to the processing procedure.

[0091] The following describes a preferred embodiment of the knife sheath that can achieve the above-mentioned purpose. Figure 1As shown, the knife sleeve 100 of the preferred embodiment of the present application is suitable for accommodating the knife handle 200 used by a compound processing machine, the knife handle 200 has a taper shank 201, the taper shank 201 has an end face 201a and an outer peripheral surface 201b, the knife handle 200 has a shaft hole 202 recessed from the end face 201a, and an annular groove 203 is arranged on the hole wall of the shaft hole 202, and a positioning groove 204 is arranged at the connecting part of the end face 201a and the outer peripheral surface 201b.

[0092] Please cooperate Figure 2 As shown, the above-mentioned knife sleeve 100 includes a knife sleeve body 10, a positioning block 20 and a knife locking device 30. Please cooperate again Figures 3 to 5 As shown, the knife sleeve body 10 is a hollow molded product formed by injection molding, has an internal partition wall 12, and forms a sleeve hole 14 on one side of the partition wall 12. The partition wall 12 has an axial hole 12a and a radial hole 12b, one end of the axial hole 12a communicates with the sleeve hole 14, and the other end communicates with the outside of the knife sleeve body 10, one end of the radial hole 12b communicates with the axial hole 12a, and the other end communicates with the outside of the knife sleeve body 10; the partition wall 12 also has a mounting hole 12c and four through holes 12d, the mounting hole 12c and the through holes 12d are arranged in parallel with the axial hole 12a, and one end thereof communicates with the sleeve hole 14 and the other end thereof communicates with the outside of the knife sleeve body 10, wherein the knife sleeve body 10 further forms a stop surface 16 at the connecting part of the hole wall of the mounting hole 12c and the hole wall of the sleeve hole 14; in addition, a virtual axis L is defined to pass through the centers of the sleeve hole 14 and the axial hole 12a, and the taper shank 201 of the knife handle 200 is inserted into the sleeve hole 14 along the axis L.

[0093] The positioning block 20 is a long strip-shaped block body made of medium carbon steel in this embodiment, the positioning block 20 is inserted into the mounting hole 12c of the knife sleeve body 10, and the mounting hole 12c is the positioning structure mentioned above. As shown in Figure 3 and Figure 4 As shown, one end of the positioning block 20 abuts against the stop surface 16, and a part thereof protrudes in the sleeve hole 14, and the protruding part is defined as a positioning part 22.

[0094] The knife locking device 30 is used to provide a radial force to the taper shank 201 inserted into the sleeve hole 14 of the knife sleeve body 10, so as to ensure that the knife handle 200 is stably accommodated in the knife sleeve 100. Please cooperate Figure 2 , Figure 6 and Figure 7As shown, the lock device 30 comprises a shaft tube 31, a plurality of steel balls 32, an unlocking member 33, a spring 34, a screw 35, a washer 36, a blocking piece 37, and a plurality of bolts 38. The shaft tube 31 is located in the sleeve hole 14, and has a plurality of side openings 31a on the tube body and a barrier 31b protruding towards the center on the inner tube wall. The steel balls 32 are respectively located in the side openings 31a. The unlocking member 33 penetrates the shaft tube 31 and can reciprocate along the axis L. One end of the unlocking member 33 is provided with a tapered pushing portion 33a which is in abutting contact with the steel balls 32. The spring 34 is sleeved on the unlocking member 33 and one end of the spring 34 abuts against the barrier 31b. The screw 35 penetrates the washer 36 and is locked in a screw hole 33b of the unlocking member 33. Thus, the unlocking member 33, the screw 35 and the washer 36 are considered as a whole, and the other end of the spring 34 abuts against the washer 36. The blocking piece 37 has a plurality of through holes 37a. The bolts 38 penetrate the through holes 37a of the blocking piece 37 and the through holes 12d of the partition wall 12 of the tool sleeve body 10, and are locked in corresponding screw holes (not shown) of the shaft tube 31.

[0095] When the bolts 38 are locked, the shaft tube 31 and the blocking piece 37 are respectively clamped against the two sides of the partition wall 12, and the blocking piece 37 abuts against the other end of the positioning block 20, so that the positioning block 20 is stably inserted into the mounting hole 12c. The spring 34 exerts a pushing force on the unlocking member 33, so that the pushing portion 33a pushes the steel balls 32 outward. When the tapered handle 201 of the tool handle 200 is inserted into the sleeve hole 14, the pushing force of the spring 34 indirectly causes the steel balls 32 to partially fall into the annular groove 203, so as to ensure that the tool handle 200 cannot be easily separated from the tool sleeve 100. The force of the steel balls 32 acting on the annular groove 203 is the radial force defined in the utility model. Conversely, if the tool handle 200 is to be pulled out, an auxiliary tool is inserted into the radial hole 12b of the tool sleeve body 10, and the auxiliary tool pushes the screw 35 to displace the unlocking member 33 and compress the spring 34, so that the steel balls 32 are separated from the annular groove 203, thereby achieving the purpose of unlocking.

[0096] In the above, when the tapered handle 201 of the tool handle 200 is inserted into the sleeve hole 14, the positioning portion 22 of the positioning block 20 is also embedded in the positioning groove 204 Figure 7 (refer to), so that the tool handle 200 cannot rotate relative to the tool sleeve body 10 with the axis L as the center. Thus, on the basis that the tool handle 200 has been fixedly connected with the tool and the tool point has been established, the tool changing mechanism can take out the correct tool handle 200 according to the machining program for subsequent machining operation.

[0097] Please also refer to Figure 1 , Figure 8and Figure 9 As shown in the drawings, the taper shank 201 of the knife handle 200 of the present embodiment is a polygonal taper, and its outer circumferential surface 201b is a non-circular circumferential surface formed by three arc surfaces. The taper shank 201 has an outer protrusion 201c at the joint between adjacent arc surfaces. The sleeve hole 14 of the present embodiment is a non-circular hole matched with the taper shank 201. The hole wall of the sleeve hole 14 has three inner protrusions 14a, and a recess 14b is formed between adjacent inner protrusions 14a. When the taper shank 201 of the knife handle 200 is inserted into the sleeve hole 14, each inner protrusion 14a of the sleeve hole 14 will abut against a corresponding arc surface of the taper shank 201 and form a contact point T with it, so that the knife handle 200 is stably supported. Each outer protrusion 201c of the taper shank 201 is located in a corresponding recess 14b, and the outer protrusion 201c and the recess 14b are spaced apart from each other. This space is convenient for dust and debris attached to the knife handle 200 to be discharged from there. Figure 8 As shown in the drawings, the taper shank 201 of the knife handle 200 of the present embodiment is a polygonal taper, and its outer circumferential surface 201b is a non-circular circumferential surface formed by three arc surfaces. The taper shank 201 has an outer protrusion 201c at the joint between adjacent arc surfaces. The sleeve hole 14 of the present embodiment is a non-circular hole matched with the taper shank 201. The hole wall of the sleeve hole 14 has three inner protrusions 14a, and a recess 14b is formed between adjacent inner protrusions 14a. When the taper shank 201 of the knife handle 200 is inserted into the sleeve hole 14, each inner protrusion 14a of the sleeve hole 14 will abut against a corresponding arc surface of the taper shank 201 and form a contact point T with it, so that the knife handle 200 is stably supported. Each outer protrusion 201c of the taper shank 201 is located in a corresponding recess 14b, and the outer protrusion 201c and the recess 14b are spaced apart from each other. This space is convenient for dust and debris attached to the knife handle 200 to be discharged from there. Figure 9 As shown in the drawings, the taper shank 201 of the knife handle 200 of the present embodiment is a polygonal taper, and its outer circumferential surface 201b is a non-circular circumferential surface formed by three arc surfaces. The taper shank 201 has an outer protrusion 201c at the joint between adjacent arc surfaces. The sleeve hole 14 of the present embodiment is a non-circular hole matched with the taper shank 201. The hole wall of the sleeve hole 14 has three inner protrusions 14a, and a recess 14b is formed between adjacent inner protrusions 14a. When the taper shank 201 of the knife handle 200 is inserted into the sleeve hole 14, each inner protrusion 14a of the sleeve hole 14 will abut against a corresponding arc surface of the taper shank 201 and form a contact point T with it, so that the knife handle 200 is stably supported. Each outer protrusion 201c of the taper shank 201 is located in a corresponding recess 14b, and the outer protrusion 201c and the recess 14b are spaced apart from each other. This space is convenient for dust and debris attached to the knife handle 200 to be discharged from there.

[0098] The above is the structure of the knife sleeve of the preferred embodiment of the present application. The injection mold for manufacturing the knife sleeve body with a positioning structure (i.e. the mounting hole) is described below. The injection mold can adjust the position of some components to make the positioning structure produced each time be located at different positions. That is, the orientation of the top end and the bottom end of the knife sleeve body is fixed, and by adjusting the position of some components of the injection mold each time, the positioning structure of the knife sleeve body produced is located at different positions in the sleeve hole.

[0099] Please refer to Figure 10 and Figure 11 As shown in the drawings, the injection mold 300 of the present embodiment includes a forming mold base 310, a first sliding block 320, and a second sliding block 330. The forming mold base 310 is composed of a first half mold 311 and a second half mold 312 that can be closed or opened. Please refer to Figure 12As shown, the first half-mold 311 has a parting surface 311a and an inner surface 311b recessed from the parting surface 311a, and the second half-mold 312 has a parting surface 312a and an inner surface 312b recessed from the parting surface 312a; when the parting surface 311a of the first half-mold 311 is engaged with the parting surface 312a of the second half-mold 312, the inner surface 311b of the first half-mold 311 and the inner surface 312b of the second half-mold 312 jointly form a cavity S. The molding seat 310 is further provided with a first opening 301 and a second opening 302 on both sides, the first opening 301 and the second opening 302 communicate with the cavity S, and a virtual baseline L1 is defined through the first opening 301, the cavity S and the second opening 302.

[0100] The first slider 320 and the second slider 330 are located on both sides of the molding seat 310 and are located on the virtual baseline L1, the first slider 320 and the second slider 330 can not only be controlled to move back and forth along the baseline L1 relative to the molding seat 310, but also can be adjusted to rotate around the baseline L1. Among them, the first slider 320 has a first end face 321 and a parting post 322 protruding from the first end face 321, the parting post 322 is located on one side deviating from the baseline L1; the second slider 330 has a tapered post 331, the tapered post 331 has an outer peripheral surface 332 and a second end face 333, the outer peripheral surface 332 is a non-circular peripheral surface, and the second end face 333 protrudes a middle post 334 and a plurality of extension posts 335.

[0101] As shown, Figure 10 When the first half-mold 311 and the second half-mold 312 are closed, the first slider 320 and the second slider 330 defined on both sides of the molding seat 310 are located in an uninserted position P1. As shown, Figure 13 and Figure 14 When the first slider 320 and the second slider 330 are controlled to pass through the first opening 301 and the second opening 302 along the baseline L1 respectively and extend into the cavity S, the first slider 320 and the second slider 330 defined in this state are located in an inserted position P2, at the same time, the parting post 322 of the first slider 320 and the tapered post 331 of the second slider 330 are located in the cavity S, and the first end face 321 and the second end face 333 are separated by a distance W.

[0102] The injection mold 300 is in Figure 13 and Figure 14The first slider 320 and the second slider 330 are controlled to retreat along the base line L1 to the non-insertion position P1 after the plastic is cooled and solidified. At this time, the plastic originally filled between the outer circumferential surface of each slider 320 (330) and the inner surface 311b (312b) of each half mold is cooled and solidified to form the cylindrical structure of the sleeve body 10, and the plastic originally filled between the first end surface 321 and the second end surface 333 forms the partition wall 12 of the sleeve body 10, the thickness of the partition wall 12 corresponding to the interval W. In addition, the space vacated by the parting column 322 of the first slider 320 forms the mounting hole 12c of the sleeve body 10 and forms the stop surface 16 on the hole wall of the sleeve joint hole 14. The space vacated by the middle column 334 of the second slider 330 forms the axial hole 12a of the sleeve body 10, the space vacated by the extension column 335 forms the through hole 12d of the sleeve body 10, and the space vacated by the tapered column 331 forms the sleeve joint hole 14 of the sleeve body 10. Then the first half mold 311 and the second half mold 312 are opened, and the molded product is removed, which is the sleeve body 10.

[0103] From the above and in combination with Figure 9 As can be seen from the drawings, the mounting hole 12c and the positioning block 20 of the sleeve body 10 of the present embodiment are located on the left side when a virtual longitudinal line L2 passes through the top end 10a and the bottom end 10b. However, as described above, the injection mold of the present application can obtain the effect of different positions of the mounting hole inside the sleeve joint hole by adjusting the positions of some components. Please refer to Figure 15 As can be seen from the drawings, the mounting hole 12c and the positioning block 20 of the sleeve body 10 of the present embodiment are located on the left side when a virtual longitudinal line L2 passes through the top end 10a and the bottom end 10b. However, as described above, the injection mold of the present application can obtain the effect of different positions of the mounting hole inside the sleeve joint hole by adjusting the positions of some components. Please refer to Figure 16 As can be seen from the drawings, the mounting hole 12c and the positioning block 20 of the sleeve body 10 of the present embodiment are located on the left side when a virtual longitudinal line L2 passes through the top end 10a and the bottom end 10b. However, as described above, the injection mold of the present application can obtain the effect of different positions of the mounting hole inside the sleeve joint hole by adjusting the positions of some components. Please refer to Figure 17 As can be seen from the drawings, the mounting hole 12c and the positioning block 20 of the sleeve body 10 of the present embodiment are located on the left side when a virtual longitudinal line L2 passes through the top end 10a and the bottom end 10b. However, as described above, the injection mold of the present application can obtain the effect of different positions of the mounting hole inside the sleeve joint hole by adjusting the positions of some components. Please refer to Figure 18 As can be seen from the drawings, the mounting hole 12c and the positioning block 20 of the sleeve body 10 of the present embodiment are located on the left side when a virtual longitudinal line L2 passes through the top end 10a and the bottom end 10b. However, as described above, the injection mold of the present application can obtain the effect of different positions of the mounting hole inside the sleeve joint hole by adjusting the positions of some components. Please refer to

[0104] As can be known from the above description, the first slider and the second slider of the injection mold can be controlled to rotate between several fixed point positions, and the positioning structure (i.e. the mounting hole) in the sleeve joint hole of the tool sleeve body produced at different fixed point positions is located at different orientations as shown in Figure 9 、 Figures 16 to 18 , thereby the handle of the tool fixedly connected with different tools can select appropriate tool sleeve bodies and be appropriately inserted therein, so that the tool position of the tool on each handle can be effectively maintained at the set position. It is worth mentioning that the injection mold of the present application can produce the above-mentioned multiple tool sleeve bodies, which can greatly reduce the cost of using multiple molds.

[0105] It is further explained that the turning angle between the fixed point positions is taken as an example of turning ninety degrees, but the turning angle can be set according to actual needs. In addition, the turning of the second slider does not have to be synchronized with the turning of the first slider, and the first slider can be turned, but the second slider is not turned.

[0106] The above only describes the preferred and feasible embodiments of the present application, and equivalent changes made in the application description and the scope of the patent application should be included in the patent scope of the present application.

Claims

1. A tool holder for a tool shank of a machine tool, wherein the tool shank has a taper shank with an end face and a peripheral face, the tool shank having a positioning groove at the junction of the end face and the peripheral face, characterized in that, The tool holder comprises: a tool holder body having a receiving hole and defining a virtual axis through the center of the receiving hole, the receiving hole being configured to receive the taper shank of the tool handle; a locking device configured to provide a radial force to the taper shank inserted into the receiving hole; a positioning block fixed to the tool holder body and having a positioning portion protruding into the receiving hole; wherein when the taper shank is inserted into the receiving hole, the positioning portion of the positioning block is inserted into the positioning groove of the tool handle, and the tool handle cannot rotate relative to the tool holder body about the virtual axis.

2. The tool holder for a tool shank of a processing machine according to claim 1, characterized in that wherein the tool holder body has a partition wall inside, the receiving hole is formed on one side of the partition wall, the partition wall has a mounting hole, and the mounting hole is connected to the receiving hole and the outside of the tool holder body; the positioning block is inserted into the mounting hole.

3. The tool holder for a tool shank of a processing machine according to claim 2, characterized in that wherein the connection part of the hole wall of the receiving hole and the hole wall of the mounting hole forms a stop surface, the locking device comprises a stop piece, one end of the positioning block abuts against the stop surface, and the stop piece is fixed to the partition wall and abuts against the other end of the positioning block.

4. The tool holder for a tool shank of a processing machine according to claim 3, characterized in that wherein the taper shank has an axial hole recessed from the end surface, and the hole wall of the axial hole is provided with a recessed annular groove; the locking device comprises a shaft tube, a plurality of steel balls, an unlocking member, and a spring, wherein the shaft tube is located in the receiving hole and fixed to the partition wall, the shaft tube has a plurality of side openings, the plurality of steel balls are respectively located in a corresponding side opening, the unlocking member is movably arranged in the shaft tube along the virtual axis, the unlocking member has a pushing portion, and the spring provides a pushing force to the unlocking member to push the plurality of steel balls into the annular groove of the taper shank.

5. The tool holder for a tool shank of a processing machine according to claim 4, characterized in that wherein the locking device comprises a plurality of bolts, the stop piece has a plurality of through holes, the partition wall of the tool holder body has a plurality of through holes, and the plurality of bolts are respectively inserted through a through hole and a through hole and locked with the shaft tube.

6. The tool holder for a tool shank of a processing machine according to any one of claims 1 to 5, characterized in that wherein the receiving hole of the tool holder body is a non-circular hole, the outer circumferential surface of the taper shank of the tool handle is a non-circular circumferential surface, and when the taper shank is inserted into the non-circular hole, the non-circular circumferential surface of the taper shank and the hole wall of the non-circular hole have at least two contact points.

7. The tool holder for a tool shank of a processing machine according to claim 6, characterized in that wherein the hole wall of the non-circular hole of the tool holder body has three inner convex portions, and a recess portion is formed between adjacent inner convex portions; the non-circular circumferential surface of the taper shank of the tool handle is composed of three arc surfaces connected together, and an outer convex portion is formed at the connection part of adjacent arc surfaces; wherein when the taper shank is inserted into the non-circular hole, each inner convex portion abuts against a corresponding arc surface to form a contact point, and each outer convex portion is located in a corresponding recess portion; wherein the positioning groove of the tool handle is located on one of the arc surfaces, and the positioning block is located on one of the inner convex portions.

Images