Tool changing mechanism

Abstract

The invention discloses a tool changing mechanism which comprises a tool changing arm assembly which comprises a tool changing arm, at least one tool changing claw, at least one tool locking rod and at least one pushing assembly. The driving assembly comprises a lifting assembly used for driving the tool changing arm to do lifting motion and a rotating assembly used for driving the tool changing arm to do rotating motion, and the lifting assembly comprises a lifting output shaft connected with the tool changing arm, an integrated gear cam, a pushing and guiding ring fixed to the tail end of the lifting output shaft and a shifting rod connected with the integrated gear cam and the pushing and guiding ring. The rotating assembly comprises a roller bearing part meshed with the integrated gear cam, and the roller bearing part is arranged on the lifting output shaft in a sleeving mode. The motor is used for driving the integrated gear cam to rotate; the transmission assembly is arranged between the motor and the integrated gear cam and used for transmission between the motor and the integrated gear cam. The invention has the advantages of few parts, simple and compact structure, small occupied space, lower manufacturing precision and mounting precision and lower cost.

Description

Technical Field

[0001] The present invention relates to the technical field of tool changing equipment, and particularly relates to a tool changing mechanism. Background Art

[0002] During the product processing, a tool changing mechanism is usually used in cooperation with a tool arm on the tool changing mechanism to complete the tool changing action between the processing equipment and the tool magazine.

[0003] Chinese Patent No. 201720394090.6 discloses a cam-type automatic rotary lifting tool changing mechanism, which can realize automatic tool changing. In this patent, a motor drives a disk cam and an arc cam to rotate through a gear shaft and a disk cam. Then, the lifting output shaft is pushed to move up and down by the disk cam and a pull rod respectively, and the lifting output shaft is pushed to rotate by the arc cam. Among them, the arc cam and the disk cam are assembled through the input shaft, and the arc cam and the disk cam are fixed together by bolts.

[0004] However, since a plurality of transmission parts such as a gear shaft, a disk cam and an arc cam are arranged between the motor and the lifting output, the tool changing structure is complex and the overall volume is large; when using a plurality of transmission parts for transmission, in order to achieve efficient and precise transmission, the manufacturing precision and installation precision of each transmission part are relatively high, so the cost of the automatic tool changing mechanism is relatively high. Summary of the Invention

[0005] In order to solve the problems of complex structure and large overall volume of the existing tool magazine, the present invention provides a tool changing mechanism.

[0006] To achieve the above-mentioned invention purpose, the technical solution adopted by the present invention is: a tool changing mechanism, comprising:

[0007] A tool changing arm assembly, including a tool changing arm, at least one tool changing claw, at least one locking tool rod and at least one pushing component. The tool changing claw can be fixed at the end of the tool changing arm and form a tool locking space with the tool changing arm. The locking tool rod can be movably arranged in the tool changing arm and partially extends into the tool locking space. The pushing component is arranged in the tool changing arm and connected with the locking tool rod;

[0008] A driving component, including a lifting component for driving the tool changing arm to move up and down and a rotating component for driving the tool changing arm to rotate. The lifting component includes a lifting output shaft connected with the tool changing arm, an integral gear cam, a derivation ring fixed at the end of the lifting output shaft, and a push rod respectively connected with the integral gear cam and the derivation ring. The rotating component includes a roller bearing part meshing with the integral gear cam. The roller bearing part is sleeved on the lifting output shaft;

[0009] A motor for driving the integral gear cam to rotate;

[0010] A transmission assembly disposed between the motor and the integral gear cam for transmitting power between the motor and the integral gear cam.

[0011] In some embodiments, the integral gear cam includes a cylindrical body, a plurality of teeth disposed circumferentially along the body, an arc-shaped cam groove disposed below the teeth and extending circumferentially along the body, and a stroke limiting groove formed in one end face of the body. The teeth are connected to the transmission assembly, the arc-shaped cam groove meshes with the roller bearing member, and the stroke limiting groove cooperates with the lever.

[0012] In some embodiments, the roller bearing member includes a sleeve sleeved on the lifting output shaft and a plurality of roller bearings circumferentially distributed at the lower end of the sleeve. The plurality of roller bearings respectively mesh with the arc-shaped cam groove. The lifting output shaft is disposed within the sleeve and rotates synchronously with the sleeve and can move up and down within the sleeve.

[0013] In some embodiments, the lifting output shaft includes a lifting section axially movably disposed within the sleeve. The cross-section of the lifting section is polygonal, and the sleeve is correspondingly provided with a polygonal first through hole.

[0014] In some embodiments, the lever is in an obtuse triangle shape. A first single-rod bearing is detachably pressed at the obtuse end of the lever, and the first single-rod bearing is movably disposed within the stroke limiting groove.

[0015] In some embodiments, a mounting hole extending circumferentially is provided at the central portion of the integral gear cam. The stroke limiting groove is disposed around the mounting hole. The stroke limiting groove has a distal end and a proximal end, and the distance between the distal end and the mounting hole is greater than the distance between the proximal end and the mounting hole.

[0016] In some embodiments, a circular chute is provided circumferentially on the derivation ring. A second single-rod bearing is detachably pressed at an acute end of the lever, and the second single-rod bearing is movably disposed within the chute. The other acute end of the lever is connected to the mounting box through a connecting rod.

[0017] In some embodiments, a mounting shaft is installed in the mounting hole. One end of the mounting shaft is mounted on the bottom plate of the mounting box through a first bearing and a first bearing seat. An installation groove is formed on the other end face of the integral gear cam. A second bearing and a second bearing seat are arranged at the position of the mounting shaft located in the installation groove. A sector-shaped scale disk is mounted on the second mounting seat. A pointer is fixed at the end of the mounting shaft, and the end of the pointer points to the scale disk.

[0018] In some embodiments, a viewing hole corresponding to the installation groove is provided on the top plate of the mounting box. The position of the pointer and the scale disk can be observed through the viewing hole.

[0019] In some embodiments, the transmission assembly includes a screw rod connected to the output shaft of the motor, and the screw rod is in meshing transmission with the gear teeth.

[0020] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] The present invention respectively connects and drives an integral gear cam with a worm, a pull rod and a roller bearing member, so as to convert the rotation of the motor into the lifting motion and rotational motion of the lifting output shaft. It has fewer parts, a simple and compact structure, occupies less space, and has smaller manufacturing accuracy and installation accuracy, and lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic diagram of a tool changing mechanism of the present invention;

[0023] Figure 2 is a three-dimensional schematic of the internal structure of a tool changing mechanism of the present invention Figure 1 ;

[0024] Figure 3 is a three-dimensional schematic of the internal structure of a tool changing mechanism of the present invention Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of the present application described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0028] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the terms "install", "set", "provided with", "connect", "connected", "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 directly connected, or indirectly connected through an intermediate medium, or there is 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 the present invention can be understood according to specific circumstances.

[0030] It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0031] Embodiment 1

[0032] Refer to Figures 1 to 3, the present disclosure provides a tool changing mechanism, including a tool changing arm assembly 1, a driving assembly 4, a motor 3 and a transmission assembly. The motor 3 drives the driving assembly to perform lifting and rotating motions through the transmission assembly, thereby driving the tool changing arm assembly 1 to perform lifting and rotating motions, so as to place the tool on the tool magazine on the processing equipment or return the tool on the processing equipment to the tool magazine.

[0033] Further, the driving assembly 4 includes a lifting assembly for driving the tool changing arm 11 to perform lifting motion and a rotating assembly for driving the tool changing arm 11 to perform rotating motion. The lifting assembly includes a lifting output shaft 41 connected to the tool changing arm 11, an integral gear cam 42, a derivation ring 43 fixed at the end of the lifting output shaft 41, and a lever 44 respectively connected to the integral gear cam 42 and the derivation ring 43. The rotating assembly includes a roller bearing member 51 meshing with the integral gear cam 42, and the roller bearing member 51 is sleeved on the lifting output shaft 41.

[0034] In the present invention, the integral gear cam 4 is respectively connected and transmitted with the transmission assembly, the lever 44 and the roller bearing member 51, so as to convert the rotation of the motor 3 into the lifting and rotating motions of the lifting output shaft 41. It has fewer parts, a simple and compact structure, occupies less space, and has smaller manufacturing and installation precisions and lower costs.

[0035] Further, the integral gear cam 42 includes a cylindrical main body 420, a plurality of teeth 421 arranged along the circumferential direction of the main body 420, an arc-shaped cam groove 422 arranged below the teeth 421 and extending along the circumferential direction of the main body 420, and a stroke limiting groove 423 opened on one end face of the main body 420. The teeth 421 are connected to the transmission assembly, the arc-shaped cam groove 422 meshes with the roller bearing member 51, and the stroke limiting groove 423 cooperates with the lever 44.

[0036] In some embodiments, the roller bearing member 51 includes a sleeve 512 sleeved on the lifting output shaft 41 and a plurality of roller bearings 511 distributed circumferentially at the lower end of the sleeve 512. The plurality of roller bearings 511 respectively mesh with the arc-shaped cam groove 422. The lifting output shaft 41 is arranged in the sleeve 512, and the lifting output shaft 41 rotates synchronously with the sleeve 512 and can perform lifting motion in the sleeve 512.

[0037] In some embodiments, the lifting output shaft 41 includes a lifting section 410 axially movably arranged in the sleeve 512. The cross-section of the lifting section 410 is polygonal, and the sleeve 512 is correspondingly provided with a polygonal first through hole.

[0038] In some embodiments, the lever 44 is in an obtuse triangle shape, and a first single-rod bearing is detachably pressed at the obtuse end of the lever 44. The first single-rod bearing is movably arranged in the stroke limiting groove 423.

[0039] In some embodiments, a circumferentially extending mounting hole is provided in the central part of the integral gear cam 42, and a stroke limiting groove 423 is arranged around the mounting hole. The stroke limiting groove 423 has a distal end and a proximal end, and the distance between the distal end and the mounting hole is greater than the distance between the proximal end and the mounting hole.

[0040] When the integral gear cam 42 rotates, it can drive the lever 44 to rotate around the fixed end of the lever 44, thereby pushing the lifting output shaft 41 to move up and down. Specifically, when the proximal end of the stroke limiting groove 423 cooperates with the first single-rod bearing, the lifting output shaft 41 is at the highest position. When the integral gear cam 42 rotates from the proximal end to the distal end of the stroke limiting groove 423, the lifting output shaft 41 moves downward. When the distal end of the stroke limiting groove 423 cooperates with the first single-rod bearing, the lifting output shaft 41 is at the lowest position. When the integral gear cam 42 rotates from the distal end to the proximal end of the stroke limiting groove 423, the lifting output shaft 41 moves upward.

[0041] In some embodiments, a circular chute is provided in the derivation ring 43 along the circumferential direction. A second single-rod bearing 45 is detachably pressed at an acute end of the lever 44, and the second single-rod bearing 45 is movably arranged in the chute. The other acute end of the lever 44 is connected to the mounting box 2 through a connecting rod 46. The end of the lever 44 provided with the connecting rod 46 is the fixed end of the lever 44.

[0042] In some embodiments, a mounting shaft 9 is installed in the mounting hole. One end of the mounting shaft 9 is installed on the bottom plate of the mounting box 2 through a first bearing and a first bearing seat. A mounting groove 424 is provided on the other end face of the integral gear cam 42. A second bearing and a second bearing seat are provided at the part of the mounting shaft 9 located in the mounting groove 424. A sector-shaped scale disk 7 is installed on the second mounting seat, and a pointer 8 is fixed at the end of the mounting shaft 9. The end of the pointer 8 points to the scale disk 7.

[0043] In some embodiments, a viewing hole 20 corresponding to the mounting groove 424 is provided on the top plate of the mounting box 2. The position of the pointer 8 and the scale disk 7 can be observed through the viewing hole 20.

[0044] In some embodiments, a transmission assembly is arranged between the motor and the integral gear cam 42 for transmitting between the motor 3 and the integral gear cam 42. The transmission assembly includes a screw rod 6 connected to the output shaft of the motor 3, and the screw rod 6 is in meshing transmission with the gear teeth 421.

[0045] In some embodiments, a shaft hole is provided on the side plate of the mounting box 2. A third bearing 52 is provided at the upper end of the sleeve 512, and the third bearing 52 is arranged in the shaft hole. The tool changing mechanism further includes a guide seat 53 sleeved on the lifting output shaft 41, and the guide seat 53 is arranged in the shaft hole and is detachably connected to the side plate.

[0046] The tool changing arm assembly 1 includes a tool changing arm 11, at least one tool changing claw 12, at least one tool locking rod 13 and at least one pushing component. The tool changing claw 12 can be fixed at the end of the tool changing arm 11 and form a tool locking space 10 with the tool changing arm 11. The tool locking rod 13 can be movably arranged in the tool changing arm 11 and partially extend into the tool locking space 10. The pushing component is arranged in the tool changing arm 11 and connected to the tool locking rod 13.

[0047] 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 obvious to those skilled in the art. The general principles defined herein can 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 rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tool changing mechanism, characterized in that, Comprising: A tool changing arm assembly (1), including a tool changing arm (11), at least one tool changing claw (12), at least one tool locking rod (13), and at least one pushing component. The tool changing claw (12) can be fixed at the end of the tool changing arm (11) and form a tool locking space (10) with the tool changing arm (11). The tool locking rod (13) can be movably arranged in the tool changing arm (11) and partially extend into the tool locking space (10). The pushing component is arranged in the tool changing arm (11) and connected to the tool locking rod (13); A driving component (4), including a lifting component for driving the tool changing arm (11) to perform a lifting motion and a rotating component for driving the tool changing arm (11) to perform a rotating motion. The lifting component includes a lifting output shaft (41) connected to the tool changing arm (11), an integral gear cam (42), a derivation ring (43) fixed at the end of the lifting output shaft (41), and a lever (44) respectively connected to the integral gear cam (42) and the derivation ring (43). The rotating component includes a roller bearing part (51) meshing with the integral gear cam (42). The roller bearing part (51) is sleeved on the lifting output shaft (41); A motor (3) for driving the integral gear cam (42) to rotate; A transmission component, arranged between the motor and the integral gear cam (42), for transmitting between the motor (3) and the integral gear cam (42).

2. The tool changing mechanism according to claim 1, wherein The integral gear cam (42) includes a cylindrical main body (420), several teeth (421) arranged along the circumference of the main body (420), an arc-shaped cam groove (422) arranged below the teeth (421) and extending along the circumference of the main body (420), and a stroke limiting groove (423) opened on one end face of the main body (420). The teeth (421) are connected to the transmission component. The arc-shaped cam groove (422) meshes with the roller bearing part (51). The stroke limiting groove (423) cooperates with the lever (44).

3. The tool changing mechanism according to claim 2, wherein The roller bearing part (51) includes a sleeve (512) sleeved on the lifting output shaft (41) and a plurality of roller bearings (511) circumferentially distributed at the lower end of the sleeve (512). The plurality of roller bearings (511) respectively mesh with the arc-shaped cam groove (422). The lifting output shaft (41) is arranged in the sleeve (512). The lifting output shaft (41) rotates synchronously with the sleeve (512) and can perform a lifting motion in the sleeve (512).

4. The tool changing mechanism according to claim 3, wherein The lifting output shaft (41) includes a lifting section (4,10) axially movably arranged in the sleeve (512). The cross section of the lifting section (410) is polygonal. The sleeve (512) is correspondingly provided with a polygonal first through hole.

5. The tool changing mechanism according to claim 2, characterized in that The shift lever (44) is in an obtuse triangle shape, and a first single-rod bearing is detachably pressed at the obtuse end of the shift lever (44), and the first single-rod bearing is movably arranged in the stroke limit groove (423).

6. The tool changing mechanism according to claim 5, characterized in that, An installation hole extending circumferentially is arranged at the central part of the integrated gear cam (42), the stroke limit groove (423) is arranged around the installation hole, the stroke limit groove (423) has a distal end and a proximal end, and the distance between the distal end and the installation hole is greater than the distance between the proximal end and the installation hole.

7. The tool changing mechanism according to claim 5, wherein A circular chute is arranged circumferentially on the derivation ring (43), a second single-rod bearing (45) is detachably pressed at an acute end of the shift lever (44), the second single-rod bearing (45) is movably arranged in the chute, and the other acute end of the shift lever (44) is connected to the installation box (2) through a connecting rod (46).

8. The tool changing mechanism according to claim 6, wherein An installation shaft (9) is installed in the installation hole, one end of the installation shaft (9) is installed on the bottom plate of the installation box (2) through a first bearing and a first bearing seat, an installation groove (424) is arranged on the other end face of the integrated gear cam (42), a second bearing and a second bearing seat are arranged at the part of the installation shaft (9) located in the installation groove (424), a sector-shaped scale disk (7) is installed on the second installation seat, a pointer (8) is fixed at the end of the installation shaft (9), and the end of the pointer (8) points to the scale disk (7).

9. The tool changing mechanism according to claim 8, characterized in that, A viewing hole (20) corresponding to the installation groove (424) is arranged on the top plate of the installation box (2), and the positions of the pointer (8) and the scale disk (7) can be observed through the viewing hole (20).

10. The tool changing mechanism according to claim 2, wherein, The transmission assembly includes a screw rod (6) connected to the output shaft of the motor (3), and the screw rod (6) is in meshing transmission with the gear teeth (421).

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