CN212705641U - Tool sleeve structure for tool magazine of machine tool - Google Patents

Abstract

The utility model provides a knife pouch structure for tool magazine of machine tool, including knife pouch and lock sword unit, wherein the knife pouch is used for accomodating the cutter arbor, lock sword unit combines inside the knife pouch for produce radial force and axial force to the tip of the cutter arbor of placeeing in the knife pouch, make the cutter arbor more stably placeeing in the knife pouch, an unblock unit can provide thrust in good time and offset the axial force in order to relieve the restriction of lock sword unit to the cutter arbor in addition, make the cutter arbor withdraw from the knife pouch easily.

Description

Tool sleeve structure for tool magazine of machine tool

Technical Field

The utility model relates to the storage of the cutter of the machine tool; in particular to a tool sleeve structure of a tool magazine for a machine tool.

Background

The tool magazine system of the machine tool provides a device for storing tools and exchanging tools required in the automatic machining process, and a common tool magazine system comprises a disc type tool magazine or a chain type tool magazine, wherein the tool magazines are provided with a plurality of tool sleeves for inserting tools of different specifications. In order to stabilize the cutter bar and prevent the cutter bar or the cutter from being damaged due to the improper loosening of the cutter bar from the cutter sleeve, a detent structure is disposed inside the cutter sleeve for preventing the improper loosening of the cutter bar by generating a detent action on one end of the cutter bar inserted in the cutter sleeve, and the detent structure can be found in the invention patent of "cutter sleeve pressing device of tool magazine sliding carrier" in taiwan patent No. I426978 and the new patent of "cutter sleeve device" in taiwan patent No. M477934. The structure can limit the position of the cutter rod, but the cutter rod only depends on the radial elastic force provided by the spring to keep the stability; in addition, the conventional locking structure usually selects a spring made of a material with high rigidity to increase the force of the steel balls against the tool holder so as to ensure that the tool holder can be stably inserted into the tool sheath.

In order to solve the above-mentioned disadvantages, the applicant of the present application has obtained a new patent of "locking and unlocking structure of tool bar of machine tool" in taiwan patent No. M586190, which can improve the stability of the inserted tool bar and has the effect of easily withdrawing the tool bar. However, the applicant is in the spirit of refinement and is expected to provide more choices for the industry, and to provide different structural designs based on similar principles, so that the present invention is produced.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide a tool sleeve structure for a tool magazine of a machine tool, which has the effects of improving the stability of the inserted tool bar and easily withdrawing the tool bar.

Accordingly, the present invention provides a tool holder structure for a tool magazine of a machine tool, including a tool holder and a tool locking unit. The cutter sleeve is provided with a cutter accommodating space, an axis is defined to pass through the center of the cutter accommodating space, and the cutter bar enters and exits the cutter accommodating space along the axis; the knife locking unit comprises a shaft tube, a packing piece, a movable ring and a pushing piece; the middle shaft tube is fixedly connected with the cutter sleeve, the shaft tube is provided with a shaft hole, the wall of the shaft tube is provided with at least one through hole which is communicated with the shaft hole, and the axis passes through the center of the shaft hole; the packing piece is accommodated in the through hole of the shaft tube; the movable ring is sleeved on the shaft tube and can move between a first position and a second position; the pushing member provides an acting force to the movable ring to keep the movable ring moving to the first position.

Wherein, one end of the shaft tube is connected with a blocking wall, the pushing piece is a spring, one end of the spring is propped against the blocking wall, and the other end is propped against the movable ring.

At least one of the blocking wall and the movable ring is provided with at least one blind hole, and one end of the spring is propped against the bottom surface of the blind hole.

Wherein, the movable ring is sleeved on the shaft tube in a mode of being incapable of rotating relative to the shaft tube.

The lock knife unit comprises a guide pin, one end of the shaft tube is connected with a blocking wall, the movable ring is provided with a through hole, the guide pin passes through the through hole, and one end of the guide pin is connected with the blocking wall.

The baffle wall is provided with a positioning hole, the guide pin is a spring pin, the outer diameter of the guide pin is smaller than the aperture of the through hole of the movable ring, and one end of the spring pin is inserted into the positioning hole.

The movable ring is provided with an inner ring surface and a pushing surface, the pushing surface is connected with the inner ring surface and is obliquely arranged, the packing piece is a steel ball, and the distance between the outer wall of the shaft tube and the inner ring surface of the movable ring is smaller than the diameter of the steel ball.

Wherein, the device comprises an unlocking unit; the knife sleeve is provided with at least one insertion hole communicated with the knife containing space, the movable ring is provided with a guide pushing surface which is obliquely arranged, the unlocking unit comprises at least one ejector rod, and the ejector rod is controlled to move and inserted into the insertion hole and pushes against the guide pushing surface to push the movable ring to move to the second position.

The knife locking unit comprises a baffle ring, the baffle ring is arranged at the other end of the shaft tube, and the movable ring is positioned between the baffle wall and the baffle ring; when the top rod is inserted into the insertion hole and contacts the baffle ring, the baffle ring provides a reaction force to the top rod.

The utility model has the advantages that when the movable ring is positioned at the first position, the urging piece supports against the end part of the cutter bar to limit the cutter bar to exit from the cutter accommodating space; when the movable ring is located at the second position, the urging member cannot abut against the end of the cutter bar, so that the cutter bar can exit the cutter accommodating space.

Drawings

Fig. 1 is a perspective view of a tool holder and a tool sleeve structure of a tool magazine for a machine tool according to a preferred embodiment of the present invention;

fig. 2 is an exploded view of the knife locking unit in the knife pouch structure according to the above preferred embodiment of the present invention;

FIGS. 3(A) and 3(B) are perspective views of the movable ring of the blade unit shown in FIG. 2 from different perspectives;

fig. 4 is a top view of the knife pouch structure according to the above preferred embodiment of the present invention;

FIG. 5 is a sectional view taken in the direction of 5-5 of FIG. 4;

FIG. 6 is a cross-sectional view taken in the direction 6-6 of FIG. 5;

FIG. 7 is an enlarged view of a portion of FIG. 6 indicated by the line A;

fig. 8 to 10 are sectional views illustrating a process of inserting the knife bar into the knife holder, wherein fig. 8 illustrates the movable ring of the knife locking unit in a first position, and fig. 9 illustrates the movable ring of the knife locking unit in a second position;

FIG. 11 is a perspective view showing the knife bar inserted into the knife pouch and the ejector pin of the unlocking unit inserted into the knife pouch;

fig. 12 is a cross-sectional view taken in the direction of 12-12 of fig. 11.

[ notation ] to show

[ the utility model ]

100 knife sheath structure

10, knife pouch

12 knife holding space

14 screw hole

16 inserting hole

20, knife locking unit

21 axle tube

21a shaft hole

21b through hole

21c abutting surface

21d caulking groove

22, movable ring

22A front side

22B rear side

22a guide and push surface

22b inner ring surface

22c push surface

22d blind hole

22e gap

22f through hole

23: bolt

24 baffle wall

24a perforation

24b positioning holes

25: guide pin

26 steel ball

27: spring

30 unlocking unit

32: ejector pin

34 baffle ring

36: C-shaped buckle

D, the distance between the outer wall of the shaft tube and the inner ring surface of the movable ring

L is the axis

P1 first position

P2 second position

200: knife bar

201 shaft

202, neck part

203: end part

203a front pushing surface

203b outer annular surface

203c rear inclined plane

Detailed Description

To illustrate the present invention more clearly, a preferred embodiment is described in detail below with reference to the accompanying drawings. Referring to fig. 1 to 6, a tool holder structure 100 for a tool magazine of a machine tool according to a preferred embodiment of the present invention is suitable for, but not limited to, a disc-type tool magazine, and the tool holder structure 100 has an effect of stabilizing a tool bar 200 so that the tool bar 200 is not easily separated from the tool holder 100. The aforementioned tool holder 200 is formed by connecting a shaft 201, a neck 202 and an end 203 in sequence, wherein one end of the shaft 201 can be fixedly connected with a tool (not shown), the outer diameter of the end 203 is larger than that of the neck 202, as shown in fig. 8 to 10, the end 203 has a front pushing surface 203a, an outer annular surface 203b and a rear inclined surface 203c, wherein the front pushing surface 203a and the rear inclined surface 203c are located on both sides of the outer annular surface 203b and are arranged obliquely.

The knife pouch structure 100 of the present embodiment includes a knife pouch 10 and a knife locking unit 20. The cutter sleeve 10 is a hollow cylinder with openings at both ends and a conical hole inside to form a cutter accommodating space 12, an axis L passing through the center of the cutter accommodating space 12 is defined, and the cutter bar 200 enters and exits the cutter accommodating space 12 along the axis L; as shown in fig. 6, the cutter sleeve 10 further has a plurality of screw holes 14 around the cutter-accommodating space 12.

The cutter locking unit 20 is combined inside the cutter sleeve 10 to limit the cutter bar 200 from exiting the cutter sleeve 10. As shown in fig. 2, the blade locking unit 20 includes a shaft tube 21, a movable ring 22, a bolt 23, a packing member, and a pushing member, which will be described below.

The shaft tube 21 has a shaft hole 21a, and the wall of the shaft tube 21 has a plurality of through holes 21b communicated with the shaft hole 21 a; the outer diameter of one end of the shaft tube 21 is contracted to form an abutting surface 21c, a caulking groove 21d is arranged in front of the abutting surface 21c, the other end of the shaft tube 21 is connected with a blocking wall 24 with the outer diameter larger than that of the shaft tube 21, and the blocking wall 24 is provided with a plurality of through holes 24 a.

The movable ring 22 is sleeved on the shaft tube 21 and can move between a first position P1 shown in fig. 8 and a second position P2 shown in fig. 9, please refer to fig. 3(a) and fig. 3(B), the periphery of the front side surface 22A of the movable ring 22 is provided with an obliquely arranged pushing and guiding surface 22A, the middle part of the front side surface 22A is provided with a concave part formed by an inner ring surface 22B and a pushing and resisting surface 22c, the inner ring surface 22B extends horizontally, the pushing and resisting surface 22c is connected with the inner ring surface 22B and is obliquely arranged, and the rear side surface 22B of the movable ring 22 is provided with a plurality of blind holes 22 d; in addition, the circumference of the movable ring 22 has notches 22e with the number equivalent to that of the through holes 24a of the blocking wall 24, so that the assembling bolts 23 can pass through the notches, the bolts 23 are locked into the screw holes 14 of the knife holder 10 after passing through the through holes 24a of the blocking wall 24, the head of the bolts 23 tightly abuts against the blocking wall 24 to fix the shaft tube 21 to the knife holder 10, and the axis L passes through the center of the shaft hole 21 a.

In addition, the movable ring 22 is preferably sleeved on the shaft tube 21 in a manner that it cannot rotate relative to the shaft tube 21, in one embodiment, a guide pin 25 is inserted through the movable ring 22 and fixed to the retaining wall 24 for the purpose of the foregoing, in the embodiment, the way to achieve the purpose of the disclosure is to provide a positioning hole 24b on the blocking wall 24, a through hole 22f is formed on the movable ring 22, the guide pin 25 is a spring pin, and the outer diameter of the spring pin is equal to the diameter of the positioning hole 24b but smaller than the diameter of the through hole 22 f. referring to fig. 7, the spring pin passes through the through hole 22f and then is inserted into the positioning hole 24b with one end thereof, and is fastened in the positioning hole 24b by the radial tension force provided by itself, but a gap is kept between the movable ring and the wall of the through hole 22f so that the movable ring 22 can be sleeved on the shaft tube 21 in a manner of not rotating relative to the shaft tube 21 but moving back and forth on the shaft tube 21.

The urging members are round balls 26, the number of which is equal to the number of the through holes 21b on the wall of the shaft tube 21, and the diameter of the balls 26 is larger than the distance D between the outer wall of the shaft tube 21 and the inner annular surface 22b of the movable ring 22, so that when the balls 26 are respectively received in one corresponding through hole 21b, the balls 26 are restrained by the inner annular surface 22b of the movable ring 22 and cannot escape from the through holes 21 b.

The pushing members are springs 27, the number of the pushing members is equal to the number of the blind holes 22d of the movable ring 22, the springs 27 are respectively arranged in one corresponding blind hole 22d, one end of each spring 27 abuts against the bottom surface of the blind hole 22d, and the other end abuts against the surface of the blocking wall 24. The spring 27 provides a pushing force to the movable ring 22 by using the blocking wall 24 as a fixed fulcrum, the pushing surface 22c of the movable ring 22 pushes the steel balls 26 to force part of the steel balls 26 to protrude from the shaft hole 21a, and the steel balls 26 at this time also limit the movable ring 22 from sliding out, thereby defining that the movable ring 22 in this state is located at the first position P1, and the pushing force of the spring 27 drives the movable ring 22 to move to the first position P1.

The above is the description of the knife sleeve and the knife locking unit of the knife sleeve structure of the utility model. Referring to fig. 8 to 10, the tool bar 200 is shown in a schematic view, wherein fig. 8 shows that the movable ring 22 is pushed by the spring 27 to be maintained at the first position P1, the tool bar 200 is inserted into the tool accommodating space 12 of the tool holder 10 along the axis L, and the front pushing surface 203a of the end 203 of the tool bar 200 contacts the portion of the steel balls 26 protruding from the shaft hole 21 a. Then, the advancing knife bar 200 pushes the steel ball 26 to move outward by the pushing surface 203a of the end 203, i.e. to move toward the movable ring 22, and during the outward movement of the steel ball 26, the steel ball 26 is limited by the through hole 21b to move only in the radial direction, and because the pushing surface 22c of the movable ring 22 is an inclined surface, the steel ball 26 moving outward pushes the movable ring 22 to move back toward the stop wall 24, and at the same time, the spring 27 is compressed, as shown in fig. 9, when the steel ball 26 contacts the outer annular surface 203b of the end 203, the movable ring 22 moves back to the second position P2. When the cutter bar 200 is pushed forward until the steel balls 26 correspond to the neck 202, since there is a gap between the outer peripheral surface of the neck 202 and the hole wall of the shaft hole 21a of the shaft tube 21, the spring 27 can push the movable ring 22 outward when the compression energy storage is released, and the pushing surface 22c of the movable ring 22 pushes the steel balls 26 to sink, until the steel balls 26 abut against the pushing surface 22c of the movable ring 22 and the back inclined surface 203c of the end 203 (refer to fig. 10), the movable ring 22 stops at the first position P1 again, and the steel balls 26 abut against the end 203 of the cutter bar 200 to limit the cutter bar 200 from retreating out of the cutter accommodating space 12. The spring 27 pushes the movable ring 22, the movable ring 22 further pushes the steel balls 26 by the inclined pushing surface 22c, and a radial force (vertical component) and an axial force (horizontal component) are generated on the end 203 of the cutter bar 200 through the steel balls 26, so that the stability of the cutter bar 200 inserted in the cutter sleeve 10 is improved, and the cutter bar does not fall off and leave the cutter accommodating space 12.

The above is the utility model discloses a structure explanation for reaching the structure of an embodiment that restricts the cutter arbor and withdraw from the broach shell, and on the basis that has broach shell 10 and lock sword unit 20, the broach shell structure of the utility model can be more including an unblock unit for controlled and produce thrust to activity ring 22 and force activity ring 22 to move back from first position P1 to second position P2, according to the restriction of removing lock sword unit 20 to cutter arbor 200, so that cutter arbor 200 can withdraw from broach shell 10 easily. The structure and operation of the unlocking unit will be described below.

As shown in fig. 5 and fig. 11, the unlocking unit 30 of the present embodiment includes two ejector rods 32, the knife pouch 10 is provided with two insertion holes 16 on the top surface thereof in cooperation with the two ejector rods 32 to respectively communicate with the knife containing space 12, and the projection range of the insertion holes 16 covers a part of the structure of the movable ring 22 located at the first position P1. As shown in fig. 12, when the two rods 32 are controlled to move synchronously and pass through the insertion hole 16 with a slightly tapered end, as the rod 32 moves downward, the rod 32 pushes the pushing surface 22a to push the movable ring 22 to move back from the first position P1 to the second position P2, i.e. the movable ring 22 moves toward the blocking wall 24 and compresses the spring 27, and at this moment, the steel balls 26 are no longer pushed by the pushing surface 22a of the movable ring 22, and because there is a distance D between the outer wall of the shaft tube 21 and the inner annular surface 22b of the movable ring 22, the steel balls 26 can move freely in the through hole 21b, i.e. the restriction of the cutter locking unit 20 on the end 203 of the cutter bar 200 is released, so that the cutter bar 200 can be easily taken out from the cutter holder 10. When the knife bar 200 is separated from the knife sleeve 10 and the ejector rod 32 is operated to withdraw from the knife sleeve 10, the knife locking unit 20 returns to the state shown in fig. 6. The movement of the push rod 32 can be achieved by controlling the change of air pressure or hydraulic pressure to drive the push rod 32 to move up and down, and the number of the push rods 32 is two, but in other embodiments, a single push rod 32 can be used to complete the operation of releasing the restriction of the cutter bar 200 by the cutter locking unit 20.

It should be noted that the unlocking unit 30 further includes a blocking ring 34 and a C-shaped buckle 36, as shown in fig. 2, the blocking ring 34 is sleeved on the other end of the shaft tube 21 connected with the blocking wall 24 and abuts against the abutting surface 21C, and the C-shaped buckle 36 is combined in the embedding groove 21d to fix the position of the blocking ring 34, so that the movable ring 22 is located between the blocking wall 24 and the blocking ring 34. The stop ring 34 is fixed in position and is mounted in a position to provide a back support for the push rod 32 when the push rod 32 is inserted downward into the tool holder 10, i.e., when the push rod 32 pushes the movable ring 22, the stop ring 34 provides a reaction force for the push rod 32 to resist an improper situation that the push rod 32 may be bent by the pushing force of the spring 27.

In the above embodiment, the spring 27 is disposed in the blind hole 22d of the movable ring 22, and one end of the spring 27 abuts against the bottom surface of the blind hole 22d, and the other end abuts against the surface of the blocking wall 24, however, in other embodiments, the blind hole may be disposed in the blocking wall 24, or both the blocking wall 24 and the movable ring 22 may be disposed with blind holes, so as to stabilize the spring 27 and prevent it from loosening.

The above description is only a preferred and practical embodiment of the present invention, and all equivalent changes to the application of the present invention in the specification and claims should be considered as being included in the scope of the present invention.

Claims (10)

1. The utility model provides a knife pouch structure for tool magazine of machine tool which characterized in that, this knife pouch structure is used for accomodating a cutter arbor, and this cutter arbor has an end, and this knife pouch structure contains:

the cutter sleeve is provided with a cutter accommodating space, an axis is defined to pass through the center of the cutter accommodating space, and the cutter bar enters and exits the cutter accommodating space along the axis;

a knife locking unit, which comprises a shaft tube, at least one packing piece, a movable ring and at least one pushing piece; the shaft tube is fixedly connected with the cutter sleeve, the shaft tube is provided with a shaft hole, the wall of the shaft tube is provided with at least one through hole communicated with the shaft hole, and the axis passes through the center of the shaft hole; the packing piece is accommodated in the through hole of the shaft tube; the movable ring is sleeved on the shaft tube and can move between a first position and a second position; the pushing piece provides an acting force to the movable ring to make the movable ring move to the first position;

therefore, when the movable ring is positioned at the first position, the urging piece abuts against the end part of the cutter bar to limit the cutter bar to exit the cutter accommodating space; when the movable ring is located at the second position, the urging member cannot abut against the end of the cutter bar, so that the cutter bar can exit the cutter accommodating space.

2. The tool holder structure of claim 1, wherein one end of the shaft tube is connected to a blocking wall, the pushing member is a spring, one end of the spring abuts against the blocking wall, and the other end of the spring abuts against the movable ring.

3. The tool holder structure of claim 2, wherein at least one of the blocking wall and the movable ring has at least one blind hole, and one end of the spring is abutted against a bottom surface of the blind hole.

4. The tool holder structure of claim 1, wherein the movable ring is rotatably mounted on the shaft tube.

5. The tool set structure of claim 4, wherein the blade locking unit comprises a guide pin, one end of the shaft tube is connected to a blocking wall, the movable ring has a through hole, the guide pin passes through the through hole, and one end of the guide pin is connected to the blocking wall.

6. The tool sheath structure of claim 5, wherein the blocking wall has a positioning hole, the guide pin is a spring pin and has an outer diameter smaller than the diameter of the through hole of the movable ring, and one end of the spring pin is inserted into the positioning hole.

7. The tool holder structure of claim 1, wherein the movable ring has an inner annular surface and an abutting surface, the abutting surface is obliquely disposed and connected to the inner annular surface, the urging member is a steel ball, and a distance between the outer wall of the shaft tube and the inner annular surface of the movable ring is smaller than a diameter of the steel ball.

8. The tool case structure for the tool magazine of machine tools as claimed in claim 1, 4 or 7, comprising an unlocking unit; the knife sleeve is provided with at least one insertion hole communicated with the knife containing space, the movable ring is provided with a guide pushing surface which is obliquely arranged, the unlocking unit comprises at least one ejector rod, and the ejector rod is controlled to move and inserted into the insertion hole and pushes against the guide pushing surface to push the movable ring to move to the second position.

9. The tool case structure for the tool magazine of machine tools as claimed in claim 2, 3, 5 or 6, comprising an unlocking unit; the knife sleeve is provided with at least one insertion hole communicated with the knife containing space, the movable ring is provided with a guide pushing surface which is obliquely arranged, the unlocking unit comprises at least one ejector rod, and the ejector rod is controlled to move and inserted into the insertion hole and pushes against the guide pushing surface to push the movable ring to move to the second position.

10. The tool sleeve structure of the tool magazine for machine tools as claimed in claim 9, wherein the knife locking unit comprises a stop ring disposed at the other end of the shaft tube, the movable ring being located between the stop wall and the stop ring; when the top rod is inserted into the insertion hole and contacts the baffle ring, the baffle ring provides a reaction force to the top rod.

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