CN110039353B

CN110039353B - Tool changing arm of automatic tool changing mechanism

Info

Publication number: CN110039353B
Application number: CN201810042190.1A
Authority: CN
Inventors: 张庆三
Original assignee: Sanjet International Co Ltd
Current assignee: Sanjet International Co Ltd
Priority date: 2018-01-16
Filing date: 2018-01-16
Publication date: 2021-08-24
Anticipated expiration: 2038-01-16
Also published as: CN110039353A

Abstract

The utility model relates to a tool changing arm of an automatic tool changing mechanism, comprising a rotating body, an abutting piece and a restricting piece. One side of the rotating body is provided with a buckling portion for buckling the tool bar, and a restricting piece is arranged on the abutting member. An abutting end of the abutting piece can contact the knife shank located in the cutting knife portion. The technology of the present invention can also be used for the use of shorter overall length of the tool change arm for the miniaturized automatic tool change mechanism.

Description

Tool changing arm of automatic tool changing mechanism

Technical Field

The present invention relates to an automatic tool changer, and more particularly to a tool changer arm for fastening a tool holder to perform a tool changing process.

Background

The tool changing arm of the automatic tool changing mechanism of the known machine tool is used for rapidly exchanging the tool holders respectively combined with the tools at two positions of the tool magazine and the processing spindle, so as to improve the working efficiency.

As shown in fig. 1 and 2, the conventional tool changer arm 1 is provided with a fastening knife portion 3 at each end of the rotating body 2, the fastening knife portion 3 has an opening 3a at one side for the tool bar 8 to enter and exit, and a concave fastening inner edge 3b to match with the tool bar 8. The tool changing arm 1 is further provided with a long rod-shaped abutting piece 4 which is inserted into the shaft hole 2a and can move at the position of the rotating body 2 close to the tool buckling part 3, the abutting piece 4 is kept to move towards the tool buckling part 3 under the pushing of a spring 5, and one end of the abutting piece can contact the tool bar 8 in the tool buckling part 3, so that the tool bar 8 is stably prevented from being loosened. In order to prevent the abutting member 4 from being separated from the rotating body 2, a long hole 4a is formed in the abutting member 4, a fixing pin 6 penetrates through the rotating body 2 and the long hole 4a, one end of the fixing pin 6 is inserted into the circular hole 2b of the rotating body 2, and the other end of the fixing pin 6 is abutted by a blocking piece 7 and fixed, so that the abutting member 4 can only move in the range of the long axis of the long hole 4a in the upward direction.

Although the tool changing arm 1 provides the functions of quick fastening, releasing and preventing the tool bar 8 from loosening, the fixing pin 6 is inserted into the body of the rotating body 2 to limit the moving stroke of the abutting member 4, so that the rotating body 2 of the tool changing arm 1 must have a certain length to vacate a space for locking the fixing pin 6, and thus, the total length of the rotating body 2 is difficult to reduce, which is not favorable for the adoption of the automatic tool changing mechanism with miniaturization by the assembling and combining manner. Similar assembling and combining structures are disclosed in M517046, silent tool changing arm structure of automatic tool changing system, I289088, clamping and releasing structure of tool changer tool changing mechanism, and the like.

Disclosure of Invention

In view of the above, the present invention provides a tool changing arm of an automatic tool changing mechanism, which is suitable for a miniaturized automatic tool changing mechanism.

In order to achieve the above object, the present invention provides a tool changing arm of an automatic tool changing mechanism, which includes a rotating body, a propping member and a limiting member. Wherein the rotating body is provided with a rotating center and at least one buckling cutter part is positioned at one side of the rotating center, and the buckling cutter part is provided with a concave buckling inner edge matched with the cutter bar; the propping piece is movably combined with the rotating body and is provided with a propping end; in addition, the rotating body is provided with at least one stopping part; the limiting part is arranged on the abutting part, and when the limiting part moves along with the abutting part and stops at the stopping part, the abutting end of the abutting part can contact the cutter bar in the cutter buckling part.

In addition, the invention also provides a tool changing arm of the automatic tool changing mechanism, which comprises a rotating body and a propping piece. Wherein one side of the rotating body is provided with a buckling cutter part for buckling the cutter bar, and the rotating body is provided with a shaft hole; the abutting piece is movably arranged in the shaft hole in a penetrating way, the abutting piece is provided with a head part which is positioned outside the shaft hole, and the head part is provided with an abutting end which can contact the cutter bar positioned in the cutter buckling part; one of the rotating body and the head part of the propping piece is provided with a stopping part, and the other is provided with a limiting part, and when the limiting part contacts the stopping part, the propping piece stops moving outwards.

The tool changer has the advantages that the tool changer is suitable for a miniaturized tool changing arm and has the function of a propping piece by changing the combination position of the limiting piece.

Drawings

FIG. 1 is an exploded perspective view of a portion of a known tool changer arm;

FIG. 2 is a partial cross-sectional view of the known tool changer arm of FIG. 1;

FIG. 3 is a perspective view of a tool changer arm of an automatic tool changer according to a preferred embodiment of the present invention;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is an exploded perspective view of a portion of the tool changer arm in accordance with the preferred embodiment of the present invention;

FIG. 6 is a cross-sectional view taken in the direction 6-6 of FIG. 4, showing the knife bar in the clasp portion; and

FIG. 7 is similar to FIG. 6 and shows the blade bar leaving the clasp.

Description of reference numerals:

100 tool changing arm

10 rotating body

10a first side wall 10b second side wall 12 clasp

12a side opening 12b fastening inner edge 14 axle hole

16a first stopper 16b and a second stopper 16a

18 positioning key 19 positioning piece

20 abutting piece

20a abutting against the tip 22a step portion of the shaft 22a

24 head 24a screw hole

30 elastic member

40 limiting piece

50 sliding tube

52 ring groove

200 cutter bar

Detailed Description

In order to more clearly illustrate the present invention, a preferred embodiment will be described in detail with reference to the accompanying drawings. Referring to fig. 3 to 5, a tool changing arm 100 of an automatic tool changing mechanism according to a preferred embodiment of the present invention includes a rotating body 10, two abutting members 20, two elastic members 30, and two limiting members 40. The rotating body 10 is connected to a driving device through a rotating shaft (not shown) and is controlled to rotate, and the driving device is known in the art and is not described in detail. The rotating body 10 is a center of rotation around the connecting shaft, which means the center of the rotating body 10 in this embodiment.

The rotary body 10 has a fastening portion 12 on each side of the rotation center for fastening the tool holders of the tool magazine and the machining spindle for exchange. The clasp cutter portion 12 has an opening 12a at one side for the tool holder 200 to enter and exit (see fig. 6), and a concave clasp inner edge 12b to engage with the tool holder 200. The rotating body 10 has a concave space adjacent to each of the fastening portions 12, the space has a first side wall 10a and a second side wall 10b intersecting with each other, wherein one end of a shaft hole 14 penetrates through the first side wall 10a, a long slot 16 is located on the second side wall 10b, and two opposite closed ends of the long slot 16 in the long axis direction form a first stopping portion 16a and a second stopping portion 16b, respectively. In addition, a positioning key 18 is combined with each clasp knife part 12, and the positioning key 18 protrudes to the clasp inner edge 12b for positioning the knife bar 200.

The two abutting members 20 are movably coupled to the rotating body 10 and each have an abutting end 20a capable of contacting the cutter bar 200 in the fastening portion 12 to prevent the cutter bar 200 from being loosened. In this embodiment, each abutting member 20 includes a shaft 22 and a head 24 connected to one end of the shaft 22, and the outer edge of the head 24 constitutes the abutting end 20 a; the other end of the shaft 22 opposite to the head 24 is inserted into the shaft hole 14, and the head 24 is exposed out of the shaft hole 14. In addition, a sliding tube 50 may be pre-disposed in each shaft hole 14, a body of the sliding tube 50 has a ring groove 52, at least one positioning member 19 penetrates the rotating body 10, and a part of the positioning member falls into the ring groove 52 so that the sliding tube 50 does not slip out relative to the rotating body 10, the shaft 22 of the abutting member 20 penetrates the sliding tube 50, the movement of the abutting member 20 is smoother by reducing the friction resistance, and the sliding tube 50 has an effect of stabilizing the movement of the abutting member 20.

The elastic force of the two elastic members 30 is used to push the abutting member 20, so that the abutting member 20 keeps moving outwards. The elastic members 30 of the present embodiment are springs and are respectively accommodated in one shaft hole 14, one end of the spring abuts against the bottom surface of the shaft hole 14, and the other end abuts against the body of the shaft 22 of the abutting member 20.

The two limiting members 40 are respectively disposed on a corresponding abutting member 20 and move along with the movement of the abutting member 20. One end of the limiting member 40 extends into the slot 16 of the rotating body 10, so that when one end of the limiting member 40 abuts against one of the closed ends of the slot 16, i.e. against the first stopping portion 16a or the second stopping portion 16b, the abutting member 20 will stop moving continuously. In the embodiment, the limiting member 40 is detachably coupled to the head portion 24 of the abutting member 20, in a specific example, the head portion 24 has a through screw hole 24a, and the limiting member 40 is a bolt and is locked in the screw hole 24a, and one end of the bolt, which penetrates through the screw hole 24a, extends into the long slot hole 16.

In the state shown in fig. 6, the tool bar 200 is located in the clasp 12, and at this time, the abutting element 20 is pushed by the elastic element 30 to maintain the outward movement, but one end of the limiting element 40 abuts against the first stop portion 16a to stop, and at this moment, the abutting end 20a on the head portion 24 of the abutting element 20 contacts the tool bar 200, so that the tool bar 200 is firmly confined between the clasp 12 and the abutting element 20.

The state shown in fig. 7 may indicate that the tool bar 200 is leaving the clasp part 12, or that the tool bar 200 is about to enter the clasp part 12. The cutter bar 200 abuts against the head 24 of the abutting element 20, and pushes the abutting element 20 to move back towards the shaft hole 14 when the cutter bar 200 enters or leaves the clasp 12, and the elastic element 30 is compressed and deformed properly so that the cutter bar 200 does not get in or out of the clasp 12 too much, and further when the cutter bar 200 enters or leaves the clasp 12, the elastic element 30 releases the compressed energy storage to make the abutting element 20 return to the state shown in fig. 6.

In the above, since the limiting member 40 is disposed on the head portion 24 of the abutting member 20, and one end of the limiting member 40 extends into the slot 16 disposed on the rotating body 10, the purpose of limiting the moving range of the abutting member 20 can be achieved, and the above structural relationship improves the problem that the total length of the rotating body is difficult to reduce due to the assembly manner that the fixing pin is inserted into the rotating body to limit the moving range of the abutting member in the conventional tool changer.

The second stopper 16b of the slot 16 provides a bottom limit for the movement of the abutting element 20, but the second stopper 16b is not limited in practice. In addition, the design that the limiting member 40 is detachably combined with the head portion 24 of the abutting member 20 has the effect of easy disassembly and assembly, and on the premise of smooth assembly, the limiting member can be manufactured in an integrated manner with the head portion of the abutting member. In addition, although the limiting member of the above embodiment is combined with the abutting member, and the stopping portion is formed in the long slot of the rotating body, on the premise that interference is not generated in the operation process, the limiting member may be disposed on the rotating body, and the stopping portion may be disposed on the abutting member instead.

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

Claims

1. A tool-changing arm of an automatic tool-changing mechanism to buckle a tool bar, comprising:

a rotating body, having a rotation center and at least one clasping portion located on one side of the rotating center, wherein the clasping portion has a concave inner edge for engaging with the shank;

at least one abutting piece is movably combined with the rotating body, and the abutting piece has an abutting end;

It is characterized by:

the rotating body has at least one stopper;

A restricting piece is arranged on the abutting piece, and when the restricting piece moves with the abutting piece and stops at the stopper portion, the abutting end of the abutting piece can contact the cutter bar located in the buckle portion;

Wherein the rotating body has a long slot adjacent to the clasp portion, the at least one stop portion includes a first stop portion and a second stop portion, wherein the first stop portion and the second stop portion The two opposite closed ends are respectively formed on the long axis of the long slot hole; one end of the restricting member extends into the long slot hole.

2 . The tool changing arm of the automatic tool changing mechanism according to claim 1 , wherein the buckling portion of the rotating body has an opening on one side for the tool bar to enter and exit, and the rotating body has a shaft hole; the abutting member comprises: 3 . a shaft, one end of the shaft is inserted into the shaft hole, the other end is located outside the shaft hole and is connected to a head, the head has the abutting end and is provided with the restricting piece.

3 . The tool changing arm of the automatic tool changing mechanism as claimed in claim 2 , wherein the restricting member is detachably coupled to the head portion of the abutting member. 4 .

4. The tool changing arm of the automatic tool changing mechanism as claimed in claim 3, wherein the head of the abutting member has a screw hole, the restricting member is a bolt and is locked into the screw hole, and one end of the bolt protrudes out The screw hole extends into the long slotted hole.

5 . The tool changing arm of the automatic tool changing mechanism according to claim 1 , comprising an elastic member, the elastic force of the elastic member pushes the abutting member so as to keep the abutting member moving outward. 6 .

6. A tool changing arm of an automatic tool changing mechanism, comprising:

a rotating body, a knife-buckling portion is arranged on one side to buckle the knife rod, and the rotating body has a shaft hole;

an abutting piece movably penetrated through the shaft hole, the abutting piece has a head located outside the shaft hole, and the head has an abutting end that can contact the knife shank located in the buckle part ;

Wherein, one of the rotating body and the head of the abutting piece has a stopper, and the other has a restricting piece. When the restricting piece contacts the stopper, the abutting piece stops moving outwards ;

The rotating body has a long slotted hole adjacent to the buckle portion, and a closed end on the long axis of the long slotted hole forms the stop portion; the restricting member is arranged on the head and has one end extending to the long slot in the hole.

7 . The tool changing arm of the automatic tool changing mechanism as claimed in claim 6 , wherein the restricting member is detachably coupled to the head portion of the abutting member. 8 .

8 . The tool changing arm of the automatic tool changing mechanism as claimed in claim 7 , wherein the head of the abutting member has a screw hole, the restricting member is a bolt and is locked into the screw hole, and one end of the bolt protrudes out. 9 . The screw hole extends into the long slotted hole.