TWM649024U - Tool change device of processing machine - Google Patents

Abstract

A tool changing device for a processing machine includes a tool changing arm connected to a fixed machine base, and a transmission mechanism driving the tool changing arm to pivot. The transmission mechanism includes a displacement cam, a follower and a rotating shaft. The surface of the displacement cam has a curved groove. The follower has a protruding part embedded in the curved groove, and the follower is connected to the curved groove. The rotating shaft is linked in a meshing manner, and the rotating shaft is connected to the tool change arm. Thereby, when the displacement cam rotates, it drives the follower to translate. The moving follower will drive the rotating shaft to rotate and drive the tool change arm to pivot accurately between two fixed points.

Description

Tool changing device of processing machine

This creation is related to machining centers, and specifically refers to a tool changing device of a machining machine.

It is known that a machining center equipped with a tool magazine achieves the purpose of quickly replacing machining tools through an automatic tool change mechanism. The automatic tool change mechanism includes a tool change arm. The tool change arm is composed of a rotating shaft connected to one end of a tool arm. , when the rotating shaft is driven, the knife arm is rotated to exchange the tool. In addition, the entire tool-changing arm of some machine models must be able to be controlled to pivot between two fixed points to adapt to different tool-changing mechanisms, such as tool-changing operations for vertical spindle heads or horizontal spindle heads. Tool changing operation.

The tool change arm in a known tool change mechanism is installed on a rotating base that can be turned over within a range of ninety degrees. By controlling the turning of the rotating base, the entire set of tool changing arms can be driven at an angle of 0 Move between two fixed points of degrees and 90 degrees. However, the overall weight of the tool change arm is not light. In order to smoothly and stably turn the rotating base, a known method is to use a hydraulic cylinder that can generate a large output power as the power source, and only use hydraulic means to push the rotating base. The flipping method of the rotating base hides the problem of inaccurate positioning of the rotating base, and the hydraulic cylinder structure has hydraulic oil leakage and non-environmental problems of subsequent treatment of the hydraulic oil. In addition, the use is also subject to the requirement that the temperature of the hydraulic oil should not be too high. limit. Therefore, the existing tool changing mechanism that can move between two fixed points is not perfect and needs to be improved.

In view of this, the purpose of this invention is to provide a tool changing device for a processing machine that can ensure the reversal and positioning of the rotating base.

In order to achieve the above purpose, the present invention provides a tool changing device for a processing machine, which includes a fixed machine base, a transmission mechanism and a tool changing arm. The transmission mechanism is combined with the machine base and includes a displacement cam, a follower, a rotating shaft and a rotating base; wherein the displacement cam is controlled to rotate around a first axis, and the surface of the displacement cam has a curve The follower has a protrusion embedded in the curved groove. When the displacement cam rotates, the follower reciprocates along the first axis direction. The rotating shaft passes through the machine base and can Rotating with a second axis as the center, the part of the rotating shaft located inside the machine base is connected with the follower in a meshing manner, and the part of the rotating shaft located outside the machine base is fixedly connected to the rotating base; the tool change arm is connected to The rotating base can pivot between a first position and a second position.

The effect of this creation is to drive the follower to translate by driving the displacement cam. The translation follower then drives the rotating shaft to rotate through engagement. The rotating shaft can drive the tool change arm between two fixed points. Precise pivot positioning.

In order to explain the present invention more clearly, a preferred embodiment is cited and described in detail below with reference to drawings. Referring to FIGS. 1 to 3 , a tool changing device 100 for a processing machine according to a preferred embodiment of the present invention is used to exchange tools on the spindle of the processing machine with tools in a tool magazine. The tool changing device 100 includes a fixed machine base 10, a tool changing arm 20 and a transmission mechanism 30. The tool changing arm 20 includes a rotating shaft 21 and a tool arm 22. One end of the rotating shaft 21 is connected to the The knife arm 22 has two opposite ends and is used to clamp a knife bar (not shown) respectively. The rotating shaft 21 can be driven to drive the knife arm 22 to perform 180-degree rotation switching.

The transmission mechanism 30 is combined with the machine base 10 to drive the tool change arm 20 to move between two fixed points. In this embodiment, the transmission mechanism 30 can drive the tool change arm 20 at an angle of 0 degrees (Fig. 3 Flip back and forth between the two fixed points (reference) and 90 degrees (refer to Figure 9). It must be noted that the aforementioned two fixed point angles are not limited to 0 degrees and 90 degrees, and can be adjusted according to actual needs. The following describes a specific structure that can drive the tool change arm 20 to move between two fixed points. The machine base 10 has a base 11 and a vertical wall 12 erected to connect the base 11. The vertical wall 12 is defined here. The side facing the tool change arm 20 is the outer side, and the opposite side is the inner side. The vertical wall 12 is provided with two convex walls 13 on one side of the inner side, and has a front cover 14 to detachably bridge the two convex walls. Wall 13.

As shown in FIGS. 4 and 5 , the transmission mechanism 30 includes a gear shaft 31 , a rotating shaft 32 , an intermediate gear 33 , a driven gear 34 and a rotating base 35 . The two ends of the gear shaft 31 and the rotating shaft 32 respectively pass through the vertical wall 12 and the front cover 14 and are rotatably arranged in parallel between the two convex walls 13; the intermediate gear 33 is sleeved on the gear shaft 31, and the The driven gear 34 is sleeved with the rotating shaft 32, and the driven gear 34 and the rotating shaft 32 can be linked by providing a keyway and a key (not shown). The intermediate gear 33 meshes with the driven gear 34. The number of teeth of the driven gear 34 is smaller than that of the driven gear 34; the rotating base 35 is arranged on the outside of the vertical wall 12 of the machine base 10 and is fixed to a chassis 23 of the tool change arm 20 through a plurality of bolts 24. Then, the rotating base 35 has a plurality of through holes 351 and is fixedly connected to the rotating shaft 32 by a plurality of bolts 36 respectively passing through one of the through holes 351 and locking into one end of the rotating shaft 32 passing through the vertical wall 12 . When the rotating shaft 32 rotates, it can drive the rotating base 35 and the tool change arm 20 to flip together. In addition, the rotating shaft 32 is optionally equipped with a retaining tube 37 at the position where it passes through the vertical wall 12 . The retaining tube 37 is located on the The space between the vertical wall 12 and the rotating base 35 is used to prevent dust or debris in the working environment from falling into the space between the rotating shaft 32 and the vertical wall 12 and hindering the smooth rotation of the rotating shaft 32 .

As shown in FIGS. 6 and 7 , the transmission mechanism 30 also includes a transmission seat 38 , a displacement cam 39 , a motor 40 , a slider 41 , a linear rail 42 and a follower 43 . Among them, the transmission base 38 is connected to the vertical wall 12 of the machine base 10 through a plurality of positioning pins 44. The transmission base 38 has a right end plate 381 and a left end plate 382 separated by a distance, and between the right end plate 381 and the left end A front bearing 45 and a rear bearing 46 are respectively provided on the plate 382; the displacement cam 39 is a cylindrical cam in this embodiment, and its two ends are respectively inserted into the front bearing 45 and the rear bearing 46. , and is rotatably coupled to the transmission seat 38, the surface of the displacement cam 39 is provided with a curved groove 391; the motor 40 is connected to the left end plate 382 of the transmission seat 38, and can drive the displacement cam 39 to a The first axis L1 is the central rotation.

The slider 41, the linear rail 42 and the follower 43 are interposed between the intermediate gear 33 and the displacement cam 39. The slider 41 is fixedly coupled to the vertical wall 12, and the linear rail 42 and the slider 42 are fixedly connected to the vertical wall 12. The block 41 is matched in a sliding pair manner, and the follower 43 is fixedly integrated with the linear rail 42 through a plurality of screws 47 . The top surface of the follower 43 has a tooth surface 431 arranged along the direction of the first axis L1. The tooth surface 431 meshes with the intermediate gear 33. The bottom surface of the follower 43 has a protruding portion 432. The protruding portion 432 is embedded in the curved groove 391 of the displacement cam 39. In this embodiment, the protruding portion 432 is a shank bearing including a shaft 432a and a head 432b. The shaft 432a One end is connected to the bottom surface of the follower 43, and the other end is connected to the head 432b. The head 432b is located in the curved groove 391. When the head 432b is designed to be rotatable, it can be lowered and aligned with the curved groove. The contact wear of the groove 391, when the head 432b is designed in a non-rotatable manner, forms an integrated structure with the shaft 432a to enhance its own stability.

The above is a structural description of the tool changing device 100 according to the preferred embodiment of the present invention, and its operation method will be described later.

Please refer to FIG. 3 and FIG. 8 , which means that the tool change arm 20 is in an upright state, and it is defined that the tool change arm 20 in this state is located in a first position P1. As shown in Figures 9 and 10, when the motor 40 is started to drive the displacement cam 39, the rotating displacement cam 39 guides the protrusion 432 through its curved groove 391, and the follower 43 is controlled. The slide block 41 and the linear rail 42 are a sliding pair and can only translate in the direction of the first axis L1. At the same time, the tooth surface 431 of the follower 43 meshes with the intermediate gear 33. The intermediate gear 33 then meshes with the driven gear 34, and the rotating driven gear 34 drives the rotating shaft 32 to rotate around a second axis L2 (see Figure 4), thus driving the rotating base 35 and The tool change arm 20 is turned over synchronously. When the tool change arm 20 is pivoted to a horizontal position, the tool change arm 20 defining this state is located in a second position P2. On the contrary, when the displacement cam 39 is controlled to rotate reversely, the tool change arm 20 can be pulled back to the first position P1. It is worth mentioning that the stroke length of the curved groove 391 of the displacement cam 39 is carefully designed so that the tool change arm 20 can reliably pivot between the first position P1 and the second position P2.

In addition, the invention can optionally provide a position limiting means to accurately position the tool change arm 20 at the first position P1 or the second position P2. As shown in Figures 4 and 5, the limiting means of this embodiment includes setting a stopper 15 on the outside of the vertical wall 12 of the machine base 10. The stopper 15 has a resisting surface 15a, and in the rotation A first contact portion 352 and a second contact portion 353 are respectively provided at two different points of the seat 35 . When the first contact portion 352 contacts the upper portion of the resisting surface 15a, the tool change arm 20 is accurately positioned at the first position P1 (refer to Figures 3 and 8). When the second contact portion 353 When contacting the lower portion of the resisting surface 15a, the tool changing arm 20 is accurately positioned at the second position P2 (see Figures 9 and 10). In other words, based on the careful design of the curved groove 391 and the setting of the stopper 15, excessive deflection of the rotating base 35 can be prevented to ensure that the tool change arm 20 is accurately positioned at the first position P1 or This second position P2. In a specific application example, the first contact portion 352 and the second contact portion 353 are bolts. By fine-tuning the depth of the bolts locked into the rotating seat 35, the first contact portion 352 or the second contact portion 353 can be made The second contact portion 353 contacts the resisting surface 15a early or late, so that the tool change arm 20 can achieve precise positioning. It is also worth mentioning that in the foregoing embodiment, the resisting surface 15a is provided on the machine base 10, and the first abutting portion 352 and the second abutting portion 353 are provided on the rotating base 35. Depending on the actual needs, the resisting surface 15a can also be provided on the machine base 35. A first contact part and a second contact part are provided on the base, and a resisting surface is provided on the rotating base.

In the above embodiment, electric control is used as the power source to drive the tool change arm 20 to pivot, that is, the motor 40 directly drives the displacement cam 39 to rotate forward and reverse, and drives the follower 43 along the first direction. One axis makes reciprocating motion in the direction L1, thereby achieving the purpose of controlling the tool change arm 20 to pivot between two fixed points. This improves the existing problem when a hydraulic cylinder is used to drive the tool change arm to move between two fixed points. Hydraulic oil leakage and subsequent treatment of hydraulic oil are not environmentally friendly, and the structure of this invention is not limited by the use of excessively high hydraulic oil temperatures.

The above-mentioned driven member 43 is connected with the driven gear 34 sleeved on the rotating shaft 32 inside the machine base 10 in a meshing manner to achieve the purpose of driving the tool change arm 20 to pivot. In the above embodiment, the driven member An intermediate gear 33 is provided between the gear 34 and the tooth surface 431 of the follower 43. However, it should be noted that the number of intermediate gears is not limited to one and may be added depending on actual needs. In addition, it is not excluded that the aforementioned intermediate gears can be added as needed. The peripheral surface of the rotating shaft is set as a tooth surface and meshes directly with the tooth surface of the driven member, thereby omitting the installation of the intermediate gear.

The tool changing device of this invention can be further equipped with an angle detection module to detect the rotation angle of the displacement cam to control the motor to stop running in a timely manner. Please refer to Figures 1 and 6. The angle detection module 50 is installed on the transmission seat 38 of the tool changer 100 of the above embodiment. As shown in Figures 7 and 11, the angle detection module 50 includes a magnet 51, an angle sensor 52 and a controller 53. The magnet 51 is located on one end surface of the displacement cam 39 through a fixed ring 54 plugged into a side hole 392 of the displacement cam 39, and The angle sensor 52 can rotate along with the rotation of the displacement cam 39 , and the angle sensor 52 is fixed on the right end plate 381 of the transmission seat 38 . The angle sensor 52 has a sensing surface 52a that is separated from a sensed surface 51a of the magnet 51 by a micro distance. The macro distance is set between 1.5mm and 3.5mm, and a separation of 2.5mm is preferred. The sensing surface 52a senses changes in the rotation angle of the magnetic field lines of the magnet 51 in a non-contact manner. When the rotation angle of the induced magnetic field lines (equal to the rotation angle of the displacement cam) meets the preset value, the controller 53 receives the signal generated by the angle sensor 52 And the motor 40 is controlled to stop running. The aforementioned preset value of the rotation angle corresponds to the two fixed-point positions of the tool change arm 20 at angles of 0 degrees and 90 degrees, that is, when the tool change arm 20 reaches the first position P1 or the third position, In the second position P2, the motor 40 stops running to prevent the tool change arm 20 from pivoting excessively.

In addition, the angle detection module can also be composed of two angle detectors and two sensing blocks. As shown in Figure 12, the two angle detectors 55 are a proximity switch and are respectively connected to a fixed plate. 57, the fixed plate 57 is fixedly connected to the right end plate 381 of the transmission seat 38; the two induction blocks 56 are a kind of signal cam and are sleeved on one end of the displacement cam 39 in a manner that can rotate synchronously with the displacement cam 39. The two sensing blocks 56 each have a protruding sensed portion 56a, and the sensed portions 56a are staggered. When each angle detector 55 detects a sensed portion 56a in time, a signal corresponding to the rotation angle is generated, and the signal is also used to control the motor 40 to stop running.

In addition, the tool changing device of the present invention can be equipped with two additional position detectors to detect the position of the driven member. In Figure 12, the two position detectors 58 and the two angle detectors 55 are electrically connected to a controller (not shown), and the two position detectors 58 are respectively connected to a fixed plate at intervals. 59, the aforementioned fixed plate 59 is then fixed to a front end plate 383 of the transmission seat 38, and one of the screws used to lock the driven member 43 and the linear rail 42 together is replaced by a screw 48 with a head. , the aforementioned head portion constitutes a sensed portion 48a. When the displacement cam 39 rotates and one of the angle detectors 55 emits a signal corresponding to the rotation angle, one of the two position detectors 58 will detect the sensed part on the driven member 43 after translation. 48a, and generate a confirmation signal, so that it can be confirmed that the follower 43 has moved into place. On the contrary, if the angle detector 55 sends a signal corresponding to the rotation angle, but the position detector 58 does not send a corresponding confirmation signal, it means that the follower 43 fails to move into place as expected. At this time, The controller will generate a warning signal as a fault reminder so that obstacles can be eliminated in time. The aforementioned position detector can also be used in conjunction with an angle detection module composed of a magnet and an angle sensor.

From the above, it can be seen that the tool change device 100 of the present invention, through the linkage relationship of the displacement cam 39, the follower 43, the intermediate gear 33 and the driven gear 34, enables the tool change arm 20 to not only pivot within a preset range, but also It can also be accurately positioned at the first position P1 or the second position P2. In addition, in order to effectively eliminate backlash, the present invention further provides a fine-tuning means that can drive the transmission seat 38 to move along the direction of the first axis L1. The fine-tuning means includes at least one adjustment rod, and the transmission seat 38 and The machine base 10 is matched in a sliding pair manner. Since the displacement cam 39 is coupled to the transmission base 38, when the at least one adjusting rod is driven, the transmission base 38 and the displacement cam 39 can be linked to synchronous displacement.

As shown in Figures 13 to 15, in one embodiment to achieve the above purpose, the machine base 10 is provided with two parallel restraining surfaces 16 on the inner surface of the vertical wall 12, and the transmission seat 38 is arranged along one of the rear surfaces 16. The upper and lower edges of the end plate 384 are each formed with a shoulder 385, and the vertical wall 12 is provided with a plurality of positioning holes 12a. The rear end plate 384 has a plurality of long slotted holes 384a. When the transmission seat 38 is installed, it is connected through its shoulder. The portion 385 cooperates with the restraining surface 16, and uses the positioning pins 44 to pass through the long slot hole 384a and extend into the corresponding positioning hole 12a, so that the transmission seat 38 can be within the long axial range of the long slot hole 384a. Displacement along the direction of the first axis L1. In one embodiment, the positioning hole 12a is a screw hole, and the positioning pin 44 is a bolt.

In addition, the at least one adjusting rod system includes a first adjusting rod 60 and a second adjusting rod 61, taking bolts as examples. In this embodiment, the first adjusting rod 60 and the second adjusting rod 61 are arranged on the same side, in which the first adjusting rod 60 is locked into a fixed block 62 fixed on the vertical wall 12. The fixed block 62 constitutes a fixed support point when the first adjusting rod 60 rotates. Therefore, when the first adjusting rod 60 is driven, When the adjusting rod 60 moves forward, the first adjusting rod 60 will push the transmission seat 38 to move in a first direction D1. The second adjusting rod 61 is directly locked into a screw hole 386 of the transmission seat 38, and one end of the second adjusting rod 61 abuts the body of the positioning pin 44, because one end of the positioning pin 44 extends into In the positioning hole 12a, when the second adjusting rod 61 is driven, the positioning pin 44 in contact with the second adjusting rod 61 constitutes a fixed support point, and the second adjusting rod 61 continues to the screw hole. When the transmission seat 386 is locked, the transmission base 38 is seemingly pulled and displaced in a second direction D2 opposite to the first direction D1. At this point, the displacement cam 39 is moved synchronously.

In the above, the displacement cam 39 that displaces synchronously with the transmission seat 38 will push the follower 43 through the protruding portion 432 to move, which is beneficial to eliminating tooth backlash and can also change the entire set of tool changers. The swing direction of the arm 20 achieves the purpose of fine adjustment. It should be noted that in other embodiments, the first adjusting lever 60 and the second adjusting lever 61 may also be arranged on the opposite side, that is, located outside the right end plate 381 and the left end plate 382 respectively; in addition, in A U-shaped nut 63 can be locked on the first adjusting rod 60 and the second adjusting rod 61 respectively, so that the first adjusting rod 60 and the second adjusting rod 61 are positioned reliably.

The above are only the best possible embodiments of this invention. Any equivalent changes made by applying the description of this invention and the patent application scope should be included in the patent scope of this invention.

[this creation] 100: Tool changing device 10: Machine base 11: Base 12: Standing wall 12a: Positioning hole 13:Protruding wall 14:Front cover 15:Block 15a: Resisting surface 16:Restrained side 20:Tool changing arm 21:Rotation axis 22: Blade arm 23:Chassis 24:bolt 30: Transmission mechanism 31:Gear shaft 32:Rotating axis 33:Intermediate gear 34: Driven gear 35: Rotating base 351:Perforation 352: First contact part 353: Second contact part 36:bolt 37:Block pipe 38: Transmission seat 381:Right end plate 382:Left end plate 383:Front board 384:Rear end plate 384a: Long slotted hole 385:Shoulder 386:Screw hole 39:Displacement cam 391: Curved groove 392:Side hole 40: Motor 41:Slider 42: Line rail 43:Follower 431: Tooth surface 432:Protrusion 432a:shaft 432b:Head 44: Positioning pin 45:Front bearing 46:Rear bearing 47:Screw 48:Screw 48a: Sensed part 50:Angle detection module 51:Magnet 51a: Sensed surface 52:Angle sensor 52a: Sensing surface 53:Controller 54:Fixed ring 55:Angle detector 56: Induction block 56a: Sensed part 57:Fixed plate 58:Position detector 59:Fixed plate 60:First adjustment lever 61:Second adjusting lever 62: Fixed block 63:U-shaped nut L1: first axis L2: Second axis P1: first position P2: second position

Figure 1 is a perspective view of a tool changing device of a processing machine according to a preferred embodiment of the present invention; Figure 2 is an exploded view of the tool changing device of the processing machine shown in Figure 1; Figure 3 is a front view of the tool change device of the processing machine shown in Figure 1, showing that the tool change arm is in a first position; Figure 4 is an exploded view of some components of the tool changer of the processing machine shown in Figure 2; Figure 5 is a combination of the components shown in Figure 4 and a perspective view from another perspective; Figure 6 is an exploded view of some components of the transmission mechanism in the tool changer of the processing machine shown in Figure 2; Figure 7 is an exploded view of the components shown in Figure 6; Figure 8 is a simplified diagram of the transmission mechanism in the tool changer of the processing machine shown in Figure 3, revealing that the first contact portion of a rotating base contacts a stopper; Figure 9 is similar to Figure 3, revealing that the tool change arm is in the second position; Figure 10 is similar to Figure 8, revealing that the second contact portion of the rotating base contacts the stopper; Figure 11 is a partially enlarged and cross-sectional view of the structure shown in Figure 8, revealing the positional relationship between an angle detection module and a displacement cam; Figure 12 is a perspective view showing the positional relationship between another angle detection module and the transmission mechanism; Figure 13 is an exploded view of some components of the tool changing device of the processing machine shown in Figure 1; Figure 14 is a cross-sectional view showing the assembly relationship between the transmission seat and the vertical wall; and FIG. 15 is a partial enlarged view of the transmission mechanism in the tool changing device of the processing machine shown in FIG. 3 .

100: Tool changing device

10: Machine base

11: Base

12: Standing wall

13:Protruding wall

14:Front cover

20:Tool changing arm

21:Rotation axis

22: Blade arm

23:Chassis

30: Transmission mechanism

34: Driven gear

35: Rotating base

38: Transmission seat

39:Displacement cam

40: Motor

44: Positioning pin

50:Angle detection module

Claims (13)

A tool changing device for a processing machine, including: a fixed machine base; A transmission mechanism is combined with the machine base and includes a displacement cam, a follower, a rotating shaft and a rotating base; wherein the displacement cam is controlled to rotate around a first axis, and the surface of the displacement cam has a Curved groove, the follower has a protrusion embedded in the curved groove, when the displacement cam rotates, the follower reciprocates along the first axis direction, the rotating shaft passes through the machine base and Able to rotate around a second axis, the part of the rotating shaft located inside the machine base is connected with the follower in a meshing manner, and the part of the rotating shaft located outside the machine base is fixedly connected to the rotating base; and A tool changing arm is connected to the rotating base and can pivot between a first position and a second position. The tool changing device of the processing machine of claim 1, wherein the transmission mechanism includes a driven gear, the driven gear is sleeved with the rotating shaft, and the driven member has a tooth surface arranged along the first axis direction, The driven element connects the driven gear in a meshing manner through its tooth surface, and the driven gear connects the rotating shaft to rotate. The tool changing device of the processing machine of claim 2, wherein the transmission mechanism includes at least one intermediate gear, the tooth surface of the driven member engages with the intermediate gear, the at least one intermediate gear engages with the driven gear, and the The number of teeth of at least one intermediate gear is smaller than the number of teeth of the driven gear. The tool changing device of the processing machine of claim 1, wherein the transmission mechanism includes a linear rail and a slide block, one of the linear rail and the slide block is fixed to the machine base, and the other is fixed to the driven components, the linear rail and the slide block cooperate in a sliding pair manner. The tool changing device of the processing machine according to claim 1, wherein the transmission mechanism includes a transmission seat, the transmission seat is combined with the machine base, and the displacement cam is rotatably arranged on the transmission seat; the tool changing device It includes a fine-tuning means for driving the transmission seat to move along the direction of the first axis. As claimed in claim 5, the tool changing device of the processing machine, wherein the fine adjustment means includes at least one adjustment rod, and the transmission seat and the machine base cooperate in a sliding pair manner, and the at least one adjustment rod is driven to rotate to link the transmission seat. shift. The tool changing device of the processing machine of claim 6, wherein the transmission seat has a plurality of long slotted holes, the machine base has a plurality of positioning holes, and a plurality of positioning pins respectively pass through one of the long slotted holes and extend into the corresponding positioning hole. in; the at least one adjusting rod includes a first adjusting rod and a second adjusting rod, wherein the first adjusting rod is driven to rotate and links the transmission base to displace in a first direction, and the second adjusting rod is driven to rotate and The transmission seat is linked to move in a second direction, and the first direction and the second direction are opposite directions. The tool changing device of a processing machine as claimed in claim 1, wherein the transmission mechanism includes a transmission base and a motor, the transmission base is combined with the machine base, the displacement cam is provided on the transmission base, and the motor is combined with the transmission base. To drive the displacement cam to rotate; the tool changing device includes an angle detection module, which is combined with the transmission seat to detect the rotation angle of the displacement cam. The tool changing device of the processing machine of claim 8, wherein the angle detection module includes a magnet and an angle sensor, the magnet is disposed on an end surface of the displacement cam and rotates with the rotation of the displacement cam, the The angle sensor is fixed on the transmission base and senses the rotation angle of the magnet's magnetic field lines in a non-contact manner and generates a signal, which controls the motor to stop running. The tool changing device of the processing machine of claim 8, wherein the angle detection module includes two angle detectors arranged on the transmission seat, and the displacement cam is provided with an angle detector capable of rotating synchronously with the displacement cam. There are two sensed parts, and each angle detector detects one of the sensed parts and generates a signal, which controls the motor to stop running. The tool changing device of the processing machine according to claim 9 or 10 includes two position detectors provided on the transmission seat, and a sensed part provided on the driven member, each of the position detectors The angle detection module is electrically connected, and when the angle detection module sends the signal, the sensed part on the follower is detected and a confirmation signal is generated. The tool changing device of the processing machine according to claim 1 includes a limiting means for positioning the tool changing arm in the first position or the second position. The tool changing device of the processing machine according to claim 12, wherein the limiting means includes a resisting surface provided on the machine base, and a first contact portion and a second contact portion provided on the rotating base, wherein When the first contact portion contacts the resisting surface, the tool changing arm is located in the first position, and when the second contacting portion contacts the resisting surface, the tool changing arm is located in the second position.

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