Tool changing structure

Abstract

The utility model discloses a tool changing structure which comprises a tool changing arm, the tool changing arm comprises a tool arm body and two tool changing claws fixed to the two ends of the tool arm body, the tool arm body is provided with two moving grooves and two movable through holes, and the movable through holes are communicated with the moving grooves in a one-to-one mode; each cutter locking rod comprises a rod body movably arranged in the corresponding moving groove and an abutting block arranged in the corresponding clamping space; and each pushing part assembly comprises a pushing part, a cover cap and a first spring, the pushing parts are movably arranged in the movable through holes and partially extend out of the tool arm body, the tool changing structure has a locking state and an unlocking state, and the states of the tool changing structure are switched by actuating the pushing parts. According to the tool changing structure, the pushing part is not in contact with the tool locking rod any more by actuating the pushing piece, so that the tool locking rod moves in the direction away from the clamping space, the tool changing structure is in an unlocked state, and the tool changing structure is simple in structure and convenient to assemble and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic tool changing devices, in particular to a tool changing structure. Background Art

[0002] The automatic tool changing structure of a machining center is used to quickly exchange tool bars located in the tool magazine and the machining spindle, so as to improve work efficiency. Therefore, the tool changing structure must have the function of quickly fastening or releasing the tool bar at the part used to fasten the tool bar, and prevent the tool bar from loosening when the tool is fastened.

[0003] A Chinese utility model patent with publication number CN208231376U discloses a tool changing arm of a tool changing device of a processing machine, which includes two arm parts, a tool-resisting rod, a longitudinal displacement block and a transverse displacement block. The longitudinal displacement block and the transverse displacement block are interlocked together so that the longitudinal displacement block can be displaced up and down in the transverse displacement block. There are multiple abutment surfaces between the longitudinal displacement block and the transverse displacement block, and each abutment surface is in parallel inclined contact with each other. Each longitudinal displacement block is displaced up and down so that each transverse displacement block is pulled toward or away from the direction of the joint part by the traction of the multiple abutment surfaces so that the other end of each tool-resisting rod can actually enter the set position inside the joint part, or can actually leave the inside of the joint part.

[0004] It is true that the tool changing arm can move the locking bar to loosen or lock the tool under the cooperation of the longitudinal displacement block and the transverse displacement block, but the longitudinal displacement block and the transverse displacement block have complex structures, many assembly and disassembly processes, and high manufacturing costs. At the same time, the two arms are respectively provided with through holes, channels, the first chamber, the second chamber, and perforations, and the processing process is complicated. Utility Model Content

[0005] In order to solve at least one technical problem in the prior art, the utility model provides a tool changing structure.

[0006] In order to achieve the above-mentioned utility model object, the technical solution adopted by the utility model is: a tool changing structure, comprising: a tool changing arm, comprising a tool arm main body and two tool changing claws fixed at both ends of the tool arm main body in the length direction, the two tool changing claws respectively form two clamping spaces with opposite opening directions with the tool arm main body, the tool arm main body is provided with two movable grooves along the length direction, the tool arm main body is also provided with two movable through holes respectively penetrating the tool arm main body in the thickness direction, and the movable through holes are connected one-to-one with the movable grooves;

[0007] Two knife locking rods, comprising a rod body movably arranged in the movable groove and a stop block arranged in the clamping space;

[0008] Two groups of push member assemblies, the push member assemblies include a push member, a cover cap and a first spring, the push member is movably configured in the movable through hole and partially extends out of the knife arm body, the push member has a pushing portion, and the tool changing structure has a locked state and an unlocked state. When the pushing portion contacts the rod body, the tool changing structure is in a locked state, and when the pushing portion does not contact the rod body, the tool changing structure is in an unlocked state. The state of the tool changing structure is switched by actuating the push member, the cover cap is used to seal the push member in the movable through hole, and the first spring is used to reset the push member.

[0009] In some embodiments, the active through hole includes a first active groove and a second active groove that are interconnected;

[0010] The pushing member further comprises a pressing pin, the pushing portion is fixed to the end of the pressing pin, and the minimum outer diameter of the pushing portion is not less than the outer diameter of the pressing pin;

[0011] The pressing pin is movably disposed in the first movable groove and the second movable groove and the knife arm body extends from the first movable groove, and the pushing portion is movably disposed in the second movable groove and abuts against the first spring;

[0012] The state of the tool changing structure is switched by pressing the pressing pin, and when the pressing pin is not pressed, the pushing portion abuts against the rod body.

[0013] In some embodiments, the cover cap is detachably fixed to the tool changing arm corresponding to the second movable groove, the cover cap has an accommodating cavity for accommodating the first spring, and a limiting groove is provided on the end surface of the pushing portion away from the pressing pin;

[0014] One end of the first spring is arranged in the accommodating cavity, and the other end is arranged in the limiting groove.

[0015] In certain embodiments, the pusher assembly further includes a second spring for forcing the knife locking rod to return to its original position, and the second spring is movably disposed in the movable groove and sleeved on the rod body.

[0016] In some embodiments, the movable groove includes a movable through hole, a spring installation groove and a movable groove arranged in sequence, the movable through hole is connected to the clamping space, the movable groove is connected to the movable through hole, and the second spring is movably configured in the spring installation groove.

[0017] In some embodiments, the rod body has a spring abutment portion, one end of the second spring abuts against the spring abutment portion, and the other end abuts against the slot wall of the spring mounting slot, so that the first spring is compressed when the tool changing structure is in an unlocked state.

[0018] In some embodiments, the rod body includes a first rod body connected to the abutment block and a second rod body connected to the first rod body, the outer diameter of the second rod body is smaller than the outer diameter of the first rod body, and the portion where the second rod body and the first rod body are connected constitutes a step, and the step forms the spring abutment portion.

[0019] In some embodiments, the second rod body is provided with a limiting groove;

[0020] The knife arm body has limit grooves corresponding to the two side walls of the movable groove;

[0021] The tool changing structure further comprises a limit block, which movably passes through the limit groove and is arranged in the limit slot, and the reciprocating distance of the tool locking rod is limited by the cooperation between the limit block and the limit groove.

[0022] In some embodiments, the tool changing arm further includes a cover plate, and the cover plate is detachably fixed on the tool arm body corresponding to the movable groove.

[0023] In certain embodiments, an axial connection hole is provided in the middle portion of the blade arm body, and the two movable grooves are centrally symmetrically arranged with the axis of the axial connection hole as the center line.

[0024] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0025] 1. The utility model actuates the push member so that the push portion and the knife locking rod are no longer in contact, so that the knife locking rod moves in a direction away from the clamping space, thereby putting the knife changing structure in an unlocked state, with a simple structure and convenient assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional diagram of the tool changing structure of the utility model;

[0027] Figure 2 It is a top view of the tool changing structure of the utility model;

[0028] Figure 3 It is a three-dimensional diagram of the tool changing arm of the utility model;

[0029] Figure 4 A half-section diagram of the tool changing structure of the utility model;

[0030] Figure 5 It is a three-dimensional diagram of the knife locking rod of the utility model. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0035] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] Reference Figures 1 to 5 The utility model provides a tool changing structure, comprising a tool changing arm 1, two tool locking rods 2 and two groups of pushing member assemblies 3.

[0038] The tool changing arm 1 comprises a tool arm body 10 and two tool changing claws 11 fixed at both ends of the tool arm body 10 in the length direction. The two tool changing claws 11 respectively form two clamping spaces 110 with opposite opening directions with the tool arm body 10. The two tool changing claws 11 can be integrally formed with the tool arm body 10 or fixed to the tool arm body 10 by bolts. In this embodiment, the tool changing claws 11 can be integrally formed with the tool arm body 10.

[0039] The knife arm body 10 is generally a rectangular plate with a certain thickness, and is provided with two moving grooves 13 along the length direction. The two knife locking rods 2 are respectively arranged in the two moving grooves 13, and are pushed by the two groups of pusher assemblies 3 to move toward or away from the clamping space 110.

[0040] The knife arm body 10 is also provided with two movable through holes 14 respectively penetrating the knife arm body 10 in the thickness direction, and the movable through holes 14 are in one-to-one communication with the movable groove 13. The pusher assembly 3 includes a pusher 31, a cap 32 and a first spring 33. The pusher 31 is movably arranged in the movable through hole 14 and partially extends out of the knife arm body 10. The pusher 31 has a pusher portion 312, and the tool changing structure has a locked state and an unlocked state. When the pusher portion 312 contacts the rod body 21, the tool changing structure is in a locked state, and when the pusher portion 312 does not contact the rod body 21, the tool changing structure is in an unlocked state. The state of the tool changing structure is switched by actuating the pusher 31.

[0041] In some embodiments, the movable through hole 14 includes a first movable groove 141 and a second movable groove 142 that are interconnected, and the inner diameter of the first movable groove 141 is smaller than the inner diameter of the second movable groove 142. The pusher 31 also includes a pressing pin 311, and a pushing portion 312 is fixed at the end of the pressing pin 311, and the minimum outer diameter of the pushing portion 312 is not smaller than the outer diameter of the pressing pin 311. The pressing pin 311 is movably disposed in the first movable groove 141 and the second movable groove 142 and extends the knife arm body 10 from the first movable groove 141, and the pushing portion 312 is movably disposed in the second movable groove 142 and abuts against the first spring 33. The state of the tool changing structure is switched by pressing the pressing pin 311. When the pressing pin 311 is not pressed, the pushing portion 312 abuts against the rod body 21, and the tool changing structure is in a locked state.

[0042] Furthermore, the cross section of the pushing portion 312 may be configured to be square or trapezoidal.

[0043] The utility model presses the pushing member 31 so that the pushing portion 311 is no longer in contact with the knife locking rod 2, so that the knife locking rod 2 moves away from the clamping space 110, thereby putting the knife changing structure in an unlocked state, avoiding wear caused by long-term interaction between the knife locking rod 2 and the driving seat.

[0044] In some embodiments, the cap 32 is used to block the pusher 31 in the movable through hole 14, and the cap 32 is detachably fixed to the tool changing arm 1 corresponding to the second movable groove 142. The first spring 33 is used to reset the pusher 31, and the first spring 33 is disposed in the second movable groove 142 and located between the cap 32 and the pusher 312. When the pressing pin 311 is pressed, the first spring 33 is compressed.

[0045] As a preferred embodiment, the cap 32 has a housing cavity for accommodating the first spring 33, and a limiting groove is provided on the end surface of the pushing portion 312 away from the pressing pin 311, and one end of the first spring 33 is arranged in the housing cavity, and the other end is arranged in the limiting groove.

[0046] In some embodiments, the pusher assembly 3 further includes a second spring 34 for forcing the knife locking rod 2 to return to its original position. The second spring 34 is movably disposed in the movable groove 13 .

[0047] Furthermore, the knife locking rod 2 includes a rod body 21 movably disposed in the movable groove 13 and a stop block 22 disposed in the clamping space 110 , and the second spring 34 is sleeved on the rod body 21 .

[0048] Further, the movable groove 13 includes a movable through hole 131, a spring installation groove 132 and a movable groove 133 arranged in sequence, the movable through hole 131 is communicated with the clamping space 110, the movable groove 133 is communicated with the movable through hole 14, and the second spring 34 is movably arranged in the spring installation groove 132. The rod body 21 has a spring abutment portion 213, one end of the second spring 34 abuts against the spring abutment portion 213, and the other end abuts against the groove wall of the spring installation groove 132, so that the first spring 33 is compressed when the tool changing structure is in the unlocked state.

[0049] Specifically, the rod body 21 includes a first rod body 211 connected to the stop block 22 and a second rod body 212 connected to the first rod body 211. The outer diameter of the second rod body 212 is smaller than the outer diameter of the first rod body 211. The portion where the second rod body 212 and the first rod body 211 are connected constitutes a step, and the step forms a spring abutment portion 213.

[0050] The movable groove 13 of the utility model has a simple structure and fewer processing steps, thereby reducing the processing difficulty of the tool changing structure.

[0051] In some embodiments, the second rod body 212 is provided with a limiting groove 2120, and the knife arm body 10 is provided with limiting grooves 134 on both side walls of the movable groove 133. The knife changing structure further includes a limiting block 4, which moves through the limiting groove 2120 and is disposed in the limiting groove 134. The reciprocating distance of the knife locking rod 2 is limited by the cooperation between the limiting block 4 and the limiting groove 134.

[0052] In some embodiments, the tool changing arm 1 further includes a cover plate 12 , and the cover plate 12 is detachably fixed on the tool arm body 10 corresponding to the movable groove 13 .

[0053] In some embodiments, an axial connection hole 100 is provided in the middle portion of the blade arm body 10, and two movable grooves 13 are centrally symmetrically arranged with the axis of the axial connection hole 100 as the center line.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the above embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tool changing structure, characterized in that: include: A tool changing arm (1) comprises a tool arm body (10) and two tool changing claws (11) fixed at two ends of the tool arm body (10) in the length direction, the two tool changing claws (11) respectively forming two clamping spaces (110) with opposite opening directions with the tool arm body (10), the tool arm body (10) being provided with two movable grooves (13) along the length direction, the tool arm body (10) being further provided with two movable through holes (14) respectively penetrating the tool arm body (10) in the thickness direction, the movable through holes (14) being connected one-to-one with the movable grooves (13); Two knife locking rods (2), comprising a rod body (21) movably arranged in the movable groove (13) and a stop block (22) arranged in the clamping space (110); Two groups of pusher assemblies (3), the pusher assemblies (3) comprising a pusher (31), a cover cap (32) and a first spring (33); the pusher (31) is movably arranged in the movable through hole (14) and partially extends out of the knife arm body (10); the pusher (31) has a pusher portion (312); the tool changing structure has a locked state and an unlocked state; when the pusher portion (312) contacts the rod body (21), the tool changing structure is in a locked state; when the pusher portion (312) does not contact the rod body (21), the tool changing structure is in an unlocked state; the state of the tool changing structure is switched by actuating the pusher (31); the cover cap (32) is used to seal the pusher (31) in the movable through hole (14); and the first spring (33) is used to reset the pusher (31).

2. The tool changing structure according to claim 1, characterized in that: The movable through hole (14) comprises a first movable groove (141) and a second movable groove (142) which are connected to each other; The pushing member (31) further comprises a pressing pin (311), the pushing portion (312) is fixed to the end of the pressing pin (311), and the minimum outer diameter of the pushing portion (312) is not less than the outer diameter of the pressing pin (311); The pressing pin (311) is movably disposed in the first movable groove (141) and the second movable groove (142) and extends from the first movable groove (141) to the knife arm body (10); the pushing portion (312) is movably disposed in the second movable groove (142) and abuts against the first spring (33); The state of the tool changing structure is switched by pressing the pressing pin (311); when the pressing pin (311) is not pressed, the pushing portion (312) abuts against the rod body (21).

3. The tool changing structure according to claim 2, characterized in that: The cover cap (32) is detachably fixed on the tool changing arm (1) corresponding to the second movable groove (142), the cover cap (32) has a receiving cavity for receiving the first spring (33), and a limiting groove is provided on the end surface of the pushing portion (312) facing away from the pressing pin (311); One end of the first spring (33) is arranged in the accommodating cavity, and the other end is arranged in the limiting groove.

4. The tool changing structure according to claim 1, characterized in that: The pusher assembly (3) also includes a second spring (34) for forcing the knife locking rod (2) to return to its original position. The second spring (34) is movably disposed in the movable groove (13) and sleeved on the rod body (21).

5. The tool changing structure according to claim 4, characterized in that: The movable groove (13) comprises a movable through hole (131), a spring installation groove (132) and a movable groove (133) which are arranged in sequence; the movable through hole (131) is connected to the clamping space (110); the movable groove (133) is connected to the movable through hole (14); and the second spring (34) is movably arranged in the spring installation groove (132).

6. The tool changing structure according to claim 5, characterized in that: The rod body (21) has a spring abutment portion (213), one end of the second spring (34) abuts against the spring abutment portion (213), and the other end abuts against the groove wall of the spring mounting groove (132), so that the first spring (33) is compressed when the tool changing structure is in an unlocked state.

7. The tool changing structure according to claim 6, characterized in that: The rod body (21) comprises a first rod body (211) connected to the stop block (22) and a second rod body (212) connected to the first rod body (211); the outer diameter of the second rod body (212) is smaller than the outer diameter of the first rod body (211); the portion where the second rod body (212) and the first rod body (211) are connected forms a step, and the step forms the spring contact portion (213).

8. The tool changing structure according to claim 7, characterized in that: The second rod body (212) is provided with a limiting groove (2120); The knife arm body (10) is provided with limiting grooves (134) on both side walls of the movable groove (133) correspondingly; The tool changing structure further comprises a limit block (4), wherein the limit block (4) is movable through the limit groove (2120) and is arranged in the limit groove (134), and the reciprocating distance of the tool locking rod (2) is limited by the cooperation between the limit block (4) and the limit groove (134).

9. The tool changing structure according to any one of claims 1 to 8, characterized in that: The tool changing arm (1) further comprises a cover plate (12), and the cover plate (12) is detachably fixed on the tool arm body (10) corresponding to the movable groove (13).

10. The tool changing structure according to any one of claims 1 to 8, characterized in that: An axial connection hole (100) is provided in the middle of the blade arm body (10), and the two movable grooves (13) are centrally symmetrically arranged with the axis of the axial connection hole (100) as the center line.

Images