Tool bar holder of machine tool

Abstract

The utility model provides a cutter bar retainer of a machine tool, which is used for accommodating a cutter bar. The cutter bar retainer comprises a retainer body and a cutter locking unit, the retainer body is provided with a sleeving hole for inserting a part of the cutter bar, and the cutter locking unit is arranged in the sleeving hole and comprises a shaft sleeve, a top block and at least one steel ball; wherein the shaft sleeve is provided with a shaft hole and is provided with at least one ball socket in the radial direction, the top block can be movably arranged in the shaft hole, and the top block limits the at least one steel ball in the at least one ball socket. When the top block is pushed to displace and the at least one steel ball is in a loose state, the cutter bar can be easily taken out.

Description

Technical Field

[0001] The utility model relates to the technical field of machining tools for machine tools, in particular to a tool bar holder for the machine tool. Background Art

[0002] The tool magazine of a known machine tool includes a plurality of tool sleeves for inserting tool rods, and each tool rod is fixed with tools of different specifications. In order to stabilize the tool rod and prevent the tool rod from being improperly loosened from the tool sleeve and causing damage to the tool rod or the tool, the known tool sleeve is usually provided with a latch structure inside thereof to produce a latching effect on one end of the tool rod inserted in the tool sleeve to prevent the tool rod from being improperly loosened. The aforementioned latch structure includes a plurality of radial holes arranged at the rear section of the tool sleeve, and a steel ball and a spring are arranged in each radial hole. The spring is installed in a manner that provides a radial force to the steel ball, forcing the steel ball to press against one end of the tool rod inserted into the tool sleeve, so that the tool rod is stably inserted in the tool sleeve.

[0003] In order to strengthen the stability of the knife bar inserted in the knife sleeve, the above-mentioned latch structure often uses a spring with a larger rigidity material, which results in a relatively large pulling force to overcome the elastic force of the spring during the process of removing the knife bar. However, this is prone to the situation where the force control is not proper during the removal and the staff is accidentally injured. In order to avoid the above-mentioned problem, the existing response method is as follows Figure 1 and Figure 2 As shown, the staff often chooses to use an auxiliary tool (such as a knife retracting wrench 1) to insert it into the preset gap G between the knife rod 2 and the knife sleeve 3 at a specific position, and then Figure 3 As shown, the tool bar 2 is forced to be separated from the tool sleeve 3 by the tool release wrench 1. Although the above method can easily remove the tool bar 2, the part of the tool release wrench 1 inserted into the gap G is prone to wear the bearing surface 2a of the tool bar 2 and the end surface 3a of the tool sleeve 3, which will indirectly affect the accuracy of subsequent alignment and assembly in the long term, especially when the tool bar 2 is connected to the spindle of a machining center, the worn bearing surface 2a will affect the stability of the tool bar 2 after being connected to the spindle. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a tool bar holder for a machine tool, which will not damage the supporting surface of the tool bar and the end surface of the tool sleeve during the tool retraction process, and can ensure the accuracy of the alignment assembly.

[0005] To achieve the above-mentioned purpose, the utility model provides a tool bar holder for a machine tool, which is used to accommodate a tool bar having an end. The tool bar holder includes a holder body and a tool locking unit, wherein the holder body has a sleeve hole and at least one side hole, wherein an axis is defined passing through the center of the sleeve hole, the tool bar enters and exits the sleeve hole along the axis, and the at least one side hole is connected to the sleeve hole. The tool locking unit is arranged in the sleeve hole of the holder body, and includes a sleeve, a top block and at least one steel ball; wherein the sleeve has an axial hole, at least one ball socket and at least one slot hole, the axis passes through the axial hole, the at least one ball socket is connected to the axial hole and the sleeve hole, and the at least one slot hole is connected to the axial hole and the at least one side hole; the top block is arranged in the axial hole of the sleeve and can move along the axis between a first position and a second position; the at least one steel ball is accommodated in the at least one ball socket and can move between a third position and a fourth position.

[0006] The effect of the utility model is that when a part of the knife rod is inserted into the sleeve hole of the retainer body and the top block is located at the first position, the at least one steel ball is restricted to the third position and abuts against the end of the knife rod to restrict the knife rod from withdrawing from the sleeve hole; when the top block is located at the second position, the at least one steel ball can move to the fourth position so that the knife rod can withdraw from the sleeve hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A three-dimensional diagram of a tool magazine of an existing machine tool using a tool retractor to remove a tool bar;

[0008] Figure 2 for Figure 1 A partial enlarged view of another angle of view of the tool magazine shown;

[0009] Figure 3 for Figure 1 The schematic diagram of the tool magazine shown is to remove the tool bar with the tool retracting wrench;

[0010] Figure 4 A three-dimensional diagram of a tool holder and tool bar of a machine tool according to a preferred embodiment of the utility model;

[0011] Figure 5 for Figure 4 Exploded view of the arbor holder shown;

[0012] Figure 6 for Figure 5 Another perspective schematic diagram of the tool bar holder shown;

[0013] Figure 7 for Figure 4 A front view of the arbor holder shown;

[0014] Figure 8 for Figure 7 8-8 direction cross-sectional view;

[0015] Fig. 9 for Figure 4 A cross-sectional view showing the tool bar being inserted into the tool bar holder;

[0016] Fig.10 Similar Fig. 9 , revealing that the knife bar is in the state of knife locking;

[0017] Fig.11 A three-dimensional diagram of the knife bar in a knife-locking state and using an operating member;

[0018] Fig.12 It is a side view of the preparatory work of retracting the tool using the operating part;

[0019] Fig.13 A cross-sectional view showing Fig.12 One end of the operating member shown extends into an annular groove of a top block;

[0020] Fig.14 Similar Fig.13 , revealing the operating member to pull to perform the knife retracting operation;

[0021] Fig.15 A front view of a tool bar holder and tool bar of another preferred embodiment of the utility model;

[0022] Fig.16 for Fig.15 16-16 direction cross-sectional view;

[0023] Wherein, the reference numerals are:

[0024] 100: Tool bar holder

[0025] 10: Retainer body

[0026] 10a: End face

[0027] 12: Installation

[0028] 14: socket part

[0029] 14a: socket hole

[0030] 14b: Side hole

[0031] 14c: Perforation

[0032] 20: Knife locking unit

[0033] 21: Bushing

[0034] 211: Trail

[0035] 212: Large diameter part

[0036] 21a: shaft hole

[0037] 21b: Keyhole

[0038] 21c: screw hole

[0039] 21d: ball socket

[0040] 21e: Slot

[0041] 21f: Bottom of hole

[0042] 21g: groove wall

[0043] 22: Restricted Parts

[0044] 22a: Threaded shaft

[0045] 22b: Contact part

[0046] 23: Spring

[0047] 24: Top block

[0048] 24a: Pushing surface

[0049] 24b: Contacted part

[0050] 24c: Annular groove

[0051] 24d: groove wall

[0052] 25:Steel Ball

[0053] 26: Bolt

[0054] 30: Operating parts

[0055] 32: Wide board

[0056] 34: Narrow body

[0057] 34a: Front edge

[0058] 34b: trailing edge

[0059] 40: Bushing

[0060] 42: shaft hole

[0061] 44: screw hole

[0062] 46: Restricted

[0063] 46a: Contact part

[0064] 48: Top block

[0065] 48a: Contacted part

[0066] 200: Tool bar

[0067] 201: Ring Wall

[0068] 202: Inner lip

[0069] 202a: Hook and Button Surface

[0070] 203: Bearing surface

[0071] L: Axis

[0072] G1: First spacing

[0073] G2: Second spacing

[0074] P1: First position

[0075] P2: Second position

[0076] P3: Third position

[0077] P4: Fourth position

[0078] S: Space DETAILED DESCRIPTION

[0079] In order to more clearly illustrate the present invention, preferred embodiments are listed and described in detail with reference to the drawings. Figures 4 to 6 As shown, the tool bar holder 100 of the preferred embodiment of the utility model is applicable to but not limited to the use of a disc-type tool magazine. The tool bar holder 100 has the effect of stabilizing the tool bar 200 and easily withdrawing the tool bar 200. The tool bar 200 can be fixed to a tool (not shown) at one end, and has an end portion at the other end. The end portion is composed of an annular wall 201 in this embodiment. The end edge of the annular wall 201 is formed with an inner protruding lip 202 facing inward, and the inner wall of the inner protruding lip 202 forms a hook surface 202a ( Fig. 9 Reference).

[0080] The tool bar holder 100 of this embodiment includes a holder body 10 and a tool locking unit 20. The holder body 10 has a mounting portion 12 and a socket portion 14, one end of the mounting portion 12 is pivotally connected to a body of a machine tool (not shown), and the other end is connected to the socket portion 14; the socket portion 14 has a socket hole 14a recessed from an end surface 10a and at least one side hole 14b located on the side wall, wherein an axis L is defined passing through the center of the socket hole 14a, and the tool bar 200 enters and exits the socket hole 14a along the axis L, and the at least one side hole 14b is an elongated hole and communicates with the socket hole 14a. In this embodiment, the number of the side hole 14b is one, and in addition, the rear end of the socket portion 14 also has two through holes 14c connected with the socket hole 14a.

[0081] The knife lock unit 20 is disposed in the sleeve hole 14a of the holder body 10 and includes a sleeve 21, a limiter 22, a spring 23, a top block 24 and at least one steel ball 25. The detailed structure and relative position of each component are described below.

[0082] Please cooperate Figures 6 to 8 As shown, the sleeve 21 is a cylindrical body with an axial hole 21a, and has two locking holes 21b and a screw hole 21c arranged along the axial direction at the tail, wherein the axial hole 21a and the screw hole 21c are connected to each other and are located on the axis L. In addition, the sleeve 21 is also provided with at least one ball socket 21d and at least one slot 21e in its radial direction. In this embodiment, the sleeve 21 is composed of a small diameter portion 211 and a large diameter portion 212, the outer diameter of the small diameter portion 211 is smaller than the outer diameter of the large diameter portion 212, the at least one ball socket 21d is located on the small diameter portion 211, and the at least one slot 21e is located on the large diameter portion 212. When the sleeve 21 passes through the corresponding through holes 14c and then is locked into the corresponding locking hole 21b through two bolts 26, the sleeve 21 is fixed to the retainer body 10 and is located in the sleeve hole 14a. At the same time, the at least one ball socket 21d communicates with the shaft hole 21a and the sleeve hole 14a, and the at least one slot 21e communicates with the shaft hole 21a and the at least one side hole 14b. Preferably, the number of the ball sockets 21d is three and distributed along the circumference, and the number of the slots 21e is one and is cut along the circumferential surface; in addition, if Figure 8 As shown, the space S formed between the outer peripheral surface of the small diameter portion 211 of the sleeve 21 and the inner wall surface of the sleeve hole 14a of the retainer body 10 can be inserted into the annular wall 201 of the tool rod 200.

[0083] The limiting member 22 has a threaded shaft 22a that is locked into the screw hole 21c of the sleeve 21 and can be locked to an adjustable depth. One end of the threaded shaft 22a extends into the shaft hole 21a and forms a contact portion 22b. In this embodiment, the limiting member 22 is a hexagon socket screw. The spring 23 is placed in the shaft hole 21a of the sleeve 21 and sleeved on the threaded shaft 22a of the limiting member 22. One end of the spring 23 abuts against a bottom 21f of the shaft hole 21a.

[0084] The top block 24 is disposed in the shaft hole 21a of the sleeve 21 and can move along the axis L. The top block 24 is generally cylindrical and has an inclined push surface 24a at the front end and a contact portion 24b formed by a flat end surface at the rear end. The other end of the spring 23 abuts against the contact portion 24b, and the elastic force of the spring 23 causes the top block 24 to maintain outward movement. The outer peripheral surface of the top block 24 is provided with a recessed portion, which corresponds to the slot 21e of the sleeve 21. In this embodiment, the recessed portion is an annular groove 24c recessed along the peripheral surface of the top block 24.

[0085] The at least one steel ball 25 is three in number to match the number of the ball sockets 21d in this embodiment. The steel balls 25 are placed one by one in the corresponding ball sockets 21d of the sleeve 21 after the top block 24 is placed in the shaft hole 21a. Under the elastic force of the spring 23, the push surface 24a of the top block 24 will keep in contact with the steel balls 25 and push the steel balls 25 outward in the radial direction. Figure 8 As shown, part of the surface of the steel balls 25 will be in contact with the spherical surface of the ball socket 21d, and another part of the surface of the steel balls 25 will protrude into the space S. It is defined here that the top block 24 in this state is located at a first position P1, the steel balls 25 are located at a third position P3, and the distance between a groove wall 21g of the groove hole 21e (i.e., the bearing surface defined in the present invention) and a groove wall 24d of the annular groove 24c (i.e., the push surface defined in the present invention) is a first distance G1.

[0086] The following describes the combination of the knife bar holder 100 and the knife bar 200. Fig. 9 As shown, during the process of inserting the knife bar 200 into the knife bar holder 100, the annular wall 201 is first inserted into the space S between the holder body 10 and the sleeve 21, and then the inner lip 202 pushes each of the steel balls 25 to leave the third position P3 and move toward the axis L. At the same time, the steel balls 25 push the top block 24 to move back from the first position P1 toward the limiting member 22, and the contacted portion 24b of the top block 24 touches the limiting member 22. 2, the top block 24 is defined to be located at a second position P2. At this moment, the position of the top block 24 can ensure that its push surface 24a keeps in contact with the steel balls 25 to prevent the steel balls 25 from falling inappropriately from the ball sockets 21d. The steel balls 25 in this state are defined to be located at a fourth position P4, and the top block 24 squeezes the spring 23 to deform, and the distance between the groove wall 21g and the groove wall 24d is increased to a second distance G2.

[0087] When the shank 200 continues to be inserted into the shank holder 100 and the inner lip 202 passes through the steel ball 25, Fig.10As shown, the top block 24 is pushed by the spring 23 and quickly returns to the first position P1 from the second position P2, the distance between the groove wall 21g and the groove wall 24d is restored to the first distance G1, and the contacted portion 24b of the top block 24 is kept at a distance from the contact portion 22b of the limiting member 22; at the same time, the push surface 24a of the top block 24 will push the steel ball 25 located at the fourth position P4 outward to the third position P3, and the steel ball 25 simultaneously abuts against the push surface 24a of the top block 24 and the hook surface 202a of the inner protruding lip 202 of the knife bar 200. At this point, the knife bar 200 will be firmly combined with the knife bar holder 100, and will not be loosened and withdrawn from the sleeve hole 14a at will.

[0088] When the knife bar 200 is to be removed, the top block 24 is simply pushed toward the second position P2 until the steel balls 25 are loose, and the knife bar 200 can be easily removed from the knife bar holder 100. The above-mentioned knife removal method does not damage the end surface 10a of the holder body 10 and a bearing surface 203 of the knife bar 200 corresponding to the end surface 10a. In an application example, the utility model provides an operating member to push the top block 24, please cooperate with Fig.11 As shown, the operating member 30 has a wide plate portion 32 and a narrow body portion 34. The wide plate portion 32 is convenient for the operator to hold. The narrow body portion 34 is connected to the wide plate portion 32 and has a front edge 34a and a rear edge 34b opposite to each other. Fig.12 and Fig.13 As shown, the operating member 30 can pass through the side hole 14b and the slot 21e with its elongated body 34, and one end of the elongated body 34 is inserted into the annular groove 24c. Fig.14 As shown, when the operating member 30 is pulled, the operating member 30 uses the portion where the front edge 34a abuts against the groove wall 21g (i.e., the bearing surface) as a fulcrum, and the portion where the rear edge 34b contacts the groove wall 24d (i.e., the pushing surface) is defined as an action end. The lever principle is used to facilitate the operating member 30 to push the top block 24 to move toward the second position P2 with the action end, causing the steel ball 25 to be in a loose state. At this point, the staff can easily pull the knife bar 200 out of the knife bar holder 100, and the end surface 10a of the holder body 10 and the bearing surface 203 of the knife bar 200 will not be damaged during the process, so as to ensure the accuracy of subsequent alignment and assembly. After removing the operating member 30, the knife bar holder 100 returns to the state shown in FIG. Figure 8 The state shown is for the next insertion of the cutter bar 200.

[0089] It is worth mentioning that the operating member 30 of the above embodiment uses the lever principle to push the top block 24 to move toward the second position P2. However, in practice, we can also choose a structure in which the width of the narrow body of the operating member is slightly larger than the first spacing G1, so that it can be directly inserted into the side hole 14b, the slot 21e and the annular groove 24c, and can also push the top block 24 to move toward the second position P2, so that the steel ball 25 is in a loose state and it is convenient for the staff to remove the knife rod 200.

[0090] In addition, the above embodiment is used to prevent the top block 24 from excessively retreating and causing the steel ball 25 to fall out of the ball socket 21d by locking the limiting member 22 behind the top block 24 and in the axial direction. However, in order to achieve the above purpose, the utility model can also adopt the following method: Fig.15 and Fig.16 Another embodiment shown in FIG. 1 is described below only in terms of the differences in structure from the above embodiment. Fig.16 The shaft sleeve 40 shown has an axial hole 42 arranged along the axial direction, and the shaft sleeve 40 is provided with a screw hole 44 in the radial direction to communicate with the shaft hole 42; the limiting member 46 is a set screw and is locked in the screw hole 44, a part of the set screw is located in the shaft hole 42 and forms a contact portion 46a; the rear end of the top block 48 has a contact portion 48a formed by a retaining wall. When the top block 48 is pushed directly by the operating member or indirectly pushed during the process of inserting the knife rod 200, when the contact portion 46a abuts against the contact portion 48a, the top block 48 stops moving to ensure that the steel ball 25 will not fall from the ball socket 21d.

[0091] The above description is only the preferred embodiment of the present utility model. Any equivalent changes made by applying the present utility model specification and the scope of patent application should be included in the patent scope of the present utility model.

Claims

1. A tool bar holder for a machine tool, characterized in that: For receiving a knife bar having one end, the knife bar holder comprises: A retainer body having a sleeve hole and at least one side hole, wherein an axis is defined passing through the center of the sleeve hole, the knife bar enters and exits the sleeve hole along the axis, and the at least one side hole is connected to the sleeve hole; A knife locking unit is arranged in the sleeve hole of the retainer body, and the knife locking unit includes a sleeve, a top block and at least one steel ball; wherein the sleeve has an axial hole, at least one ball socket and at least one slot hole, the axis passes through the axial hole, the at least one ball socket connects the axial hole and the sleeve hole, and the at least one slot hole connects the axial hole and the at least one side hole; the top block is arranged in the axial hole of the sleeve and can move along the axis between a first position and a second position; the at least one steel ball is accommodated in the at least one ball socket and can move between a third position and a fourth position; Wherein, when a portion of the knife rod is inserted into the socket hole of the retainer body and the top block is located at the first position, the at least one steel ball is restricted to the third position and abuts against the end of the knife rod to restrict the knife rod from withdrawing from the socket hole; when the top block is located at the second position, the at least one steel ball can move to the fourth position so that the knife rod can withdraw from the socket hole.

2. The tool bar holder for a machine tool according to claim 1, characterized in that: An operating member is included. The operating member has an action end which can be inserted into the at least one side hole and the at least one slot hole and contact the top block. The operating member is controlled to push the top block to move to the second position through the action end.

3. The tool bar holder for a machine tool according to claim 2, characterized in that: The outer peripheral surface of the top block has a recessed portion, and the action end of the operating member can be inserted into the recessed portion.

4. The tool bar holder for a machine tool according to claim 3, characterized in that: The at least one slotted hole of the sleeve has a bearing surface, and the recessed portion of the top block has a pushing surface; the operating member has a narrow and long body that can be inserted into the at least one side hole, the at least one slotted hole and the recessed portion, and the narrow and long body has the working end; the operating member uses the portion where the narrow and long body contacts the bearing surface as a fulcrum, and uses the working end to abut against the pushing surface, so that when the operating member is pulled, the top block can be pushed to move to the second position.

5. The tool bar holder for a machine tool according to claim 3 or 4, characterized in that: The at least one slotted hole of the shaft sleeve is cut along the peripheral surface, and the recessed portion of the top block is an annular groove formed by recessing along the peripheral surface, and the annular groove corresponds to the at least one slotted hole.

6. The tool bar holder for a machine tool according to claim 1, characterized in that: The shaft sleeve has a small diameter portion and a large diameter portion, the at least one ball socket is arranged in the radial direction of the small diameter portion, and the at least one slot is arranged in the radial direction of the large diameter portion.

7. The tool bar holder for a machine tool according to claim 6, characterized in that: The knife locking unit comprises a limiting member, which is combined with the sleeve and has a contact portion; the front end of the top block has a pushing surface, and the rear end has a contacted portion, the pushing surface maintains contact with the at least one steel ball, and when the contacted portion contacts the contact portion, the top block is located at the second position.

8. The tool bar holder for a machine tool according to claim 7, characterized in that: The sleeve has a screw hole connected to the shaft hole, and the axis passes through the screw hole; the limiting member has a threaded rod body locked in the screw hole, one end of the threaded rod body located in the shaft hole constitutes the contact part, and the rear end of the top block has an end surface constituting the contacted part.

9. The tool bar holder for a machine tool according to claim 7, characterized in that: The shaft sleeve has a screw hole connected to the shaft hole, and the screw hole is located in the radial direction; the limiting member is a set screw locked in the screw hole, and the part of the set screw located in the shaft hole constitutes the contact part, and the rear end of the top block has a retaining wall constituting the contacted part.

10. The tool bar holder for a machine tool according to claim 1, characterized in that: The knife locking unit includes a spring, the shaft hole of the sleeve has a bottom, the spring is arranged in the shaft hole with one end abutting against the bottom of the hole and the other end abutting against the top block, and the elastic force of the spring causes the top block to maintain moving toward the first position.

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