CN219402093U - Inductor pin cutting device - Google Patents

Abstract

The utility model provides an inductor pin cutting device which comprises a workbench, a feeding mechanism and a cutting mechanism, wherein the feeding mechanism is arranged on the workbench and is used for supplying inductors arranged according to a set orientation to the cutting mechanism, the cutting mechanism is arranged on the workbench and is positioned behind the feeding mechanism and is used for cutting pins of the inductors supplied by the feeding mechanism.

Description

Inductor pin cutting device

Technical Field

The utility model relates to the technical field of machining equipment, in particular to an inductor pin cutting device.

Background

The inductor is also called a choke, a reactor and a dynamic reactor, and is an electronic component capable of converting electric energy into magnetic energy and storing the magnetic energy.

The inductor is similar in structure to a transformer but has only one winding. The inductor has a certain inductance, which only impedes the current variation. If the inductor is in a state where no current is passing, it will attempt to block the flow of current through it when the circuit is on; if the inductor is in a state where current is flowing, it will attempt to maintain the current unchanged when the circuit is open.

In practical application, according to the use requirement, some inductors need to have pins with equal length, while some inductors need to have pins with unequal length (i.e. a long-short pin structure), and compared with the equal length pin structure, the unequal length pin structure has higher requirements for cutting pins.

In the prior art, no matter the inductor of equal-length pin structure or unequal-length pin structure is when cutting its pin, often adopt the operation mode of manual feeding, and one of them operation mode is that the operator is placed the inductor one by one and is cut on cutting the station, and another operation mode is that the operator once only is a plurality of inductors and paste on the material area in sharp range, and a plurality of inductors that will fix are placed and are cut on cutting the station again, however, these two kinds of operation modes that adopt manual feeding are lower to the supply efficiency of inductor, are difficult to satisfy the great inductance processing demand of demand.

Disclosure of Invention

In view of the above, it is necessary to provide an inductor pin cutting device with higher inductor supply efficiency, so as to meet the requirement of batch inductor pin cutting processing.

The utility model provides an inductor pin cutting device, which comprises:

a work table;

the feeding mechanism is arranged on the workbench and comprises a vibrating disc and a conveying rail, one end of the conveying rail is communicated with a discharge hole of the vibrating disc, the vibrating disc is used for conveying an inductor to the conveying rail according to a set direction, and pins of the inductor at least partially extend out of the conveying rail;

the cutting mechanism is arranged on the workbench and located at the rear of the feeding mechanism, and comprises a first cutter and a second cutter, wherein the first cutter and the second cutter are oppositely arranged and used for cutting pins of the conveying track, and the pins extend out of the conveying track.

Further, the conveying track comprises a first section and a second section, the second section is connected with the first section and is far away from one end of the discharge hole, the second section comprises two lifting plates, a yielding space is formed between the two lifting plates at a certain distance, and the pins are located in the yielding space and at least partially extend out of the yielding space.

Further, the cutting device further comprises a transferring mechanism, the transferring mechanism comprises a fork piece, a first driving device and a second driving device, the fork piece is arranged at the output end of the first driving device and is used for realizing the fork taking or releasing of at least one inductor through the first driving device, and the first driving device is arranged at the output end of the second driving device and is used for realizing the transfer of the fork piece between the first section and the second section through the second driving device.

Further, the transfer mechanism further comprises a third driving device, and the second driving device is arranged at the output end of the third driving device and realizes lifting through the third driving device.

Further, the third driving device drives the feeding mechanism to lift at the same time.

Further, a stop lever is disposed between the first section and the second section.

Further, along the direction of delivery track, the top of first section is equipped with the deflector, the deflector includes guiding portion and spacing portion, guiding portion locates spacing portion keeps away from the one end of second section, the interval is equipped with a plurality of sensors on the deflector, and is a plurality of the sensor is used for the response respectively on the first section the length of the range of inductance.

Further, at least one abdication groove is formed in the first cutter, and one pin of the inductor is positioned in the abdication groove when cutting; or when cutting, two pins adjacent to the inductor are positioned in the yielding groove.

Further, the cutting mechanism further comprises a base, a fourth driving device, a first cutter holder and a second cutter holder, wherein the base is arranged on the workbench in a lifting mode, the first cutter holder is arranged at the output end of the fourth driving device, the first cutter is arranged on the first cutter holder, the second cutter holder is arranged on the base, and the second cutter is arranged on the second cutter holder.

Further, the cutting mechanism further comprises two supporting plates, the two supporting plates are arranged on the second tool apron at a certain distance, two ends of each lifting plate are respectively arranged on one supporting plate, an adjusting groove is formed in each supporting plate, a fixing piece penetrates through the adjusting grooves to be connected with the second tool apron, and the position of the fixing piece in the adjusting grooves is changed to change the position of the supporting plate on the second tool apron.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the vibrating disc and the conveying track are arranged, so that materials in the vibrating disc are conveyed to the conveying track according to the set direction under the action of the vibrating disc, and the pins of the inductor according to the set direction at least partially extend out of the conveying track, so that the pins extending out of the conveying track are convenient to be cut by the cutting mechanism, thereby realizing automatic and rapid feeding of the inductor, and further improving the cutting efficiency of the pins.

Drawings

Fig. 1 is a schematic structural diagram of an inductor.

Fig. 2 is an overall schematic of an embodiment of the present utility model.

FIG. 3 is a schematic diagram of an embodiment of a feeding mechanism and a table according to the present utility model.

Fig. 4 is a schematic view of a first embodiment of the conveyor track of the present utility model.

Fig. 5 is a schematic view of a second embodiment of the conveyor track of the present utility model.

FIG. 6 is a schematic view of an embodiment of a cutting mechanism according to the present utility model.

FIG. 7 is another schematic view of an embodiment of a cutting mechanism according to the present utility model.

FIG. 8 is a schematic view of a part of an embodiment of the cutting mechanism according to the present utility model.

Fig. 9 is a schematic diagram of a first cutter and a second cutter according to an embodiment of the present utility model.

FIG. 10 is a schematic view of an embodiment of the transfer mechanism of the present utility model.

Fig. 11 is an enlarged view at a in fig. 3.

Reference numerals illustrate:

100. a cutting device; 10. a work table; 20. a feeding mechanism; 21. a vibration plate; 211. a discharge port; 22. a conveying rail; 221. a first section; 2211. a support plate; 2212. a limiting plate; 222. a second section; 2221. lifting a plate; 2222. a space for giving way; 223. a guide plate; 2231. a guide part; 2232. a limit part; 23. a linear vibrator; 24. a sensor; 30. a cutting mechanism; 31. a first cutter; 311. a relief groove; 32. a second cutter; 33. a base; 331. a mounting plate; 332. a guide rod; 333. guide sleeve; 334. a screw; 34. a fourth driving device; 35. a first tool apron; 36. a second tool apron; 37. a support plate; 371. an adjustment tank; 40. a transfer mechanism; 41. a fork; 411. fork grooves; 42. a first driving device; 43. a second driving device; 44. a mounting frame; 51. a stop lever; 52. a telescopic cylinder; 60. a controller; 70. a chute; 80. a collection box; 200. an inductance; 201. pins; 202. a skeleton; 203. a boss; 204. a groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the utility model. The connection relationships shown in the drawings are for convenience of clarity of description only and are not limiting on the manner of connection.

It is noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component, or intervening components may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It should also be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless otherwise specifically defined and limited; either mechanically or electrically, or by communication between two components. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

It should also be noted that, in the description of the present utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-2, the present utility model provides a cutting device 100 for pins 201 of an inductor 200, wherein the cutting device 100 is used for cutting the pins 201 of the inductor 200 shown in fig. 1, so that the pins 201 of the inductor 200 meet the installation requirement. The inductor 200 includes a backbone 202 and two pins 201, and two pins 201 extend from one end of the backbone 202.

In one embodiment, the skeleton 202 is i-shaped, and further, two bosses 203 are formed at a certain distance from one end of the skeleton 202, which corresponds to the two pins 201, and a groove 204 is formed on the end surface of the two bosses 203, which corresponds to the skeleton 202, and the two pins 201 are located in the groove 204.

The cutting device 100 comprises a workbench 10, a feeding mechanism 20 and a cutting mechanism 30, wherein the feeding mechanism 20 is arranged on the workbench 10 and is used for supplying the inductor 200 arranged according to a set orientation to the cutting mechanism 30, and the cutting mechanism 30 is arranged on the workbench 10 and is positioned behind the feeding mechanism 20 and is used for cutting pins 201 of the inductor 200 supplied by the feeding mechanism 20.

Referring to fig. 3-5, the feeding mechanism 20 includes a vibration plate 21 and a conveying rail 22, one end of the conveying rail 22 is communicated with a discharge hole 211 of the vibration plate 21, the vibration plate 21 is used for conveying the inductor 200 toward the conveying rail 22 according to a set direction, and a pin 201 of the inductor 200 at least partially extends out of the conveying rail 22.

Further, the conveying rail 22 is a linear conveying rail 22, and is configured to convey the inductor 200 along a straight line, the workbench 10 is further provided with a linear vibrator 23, the conveying rail 22 is disposed on the linear vibrator 23, and the inductor 200 on the conveying rail 22 moves toward the cutting mechanism 30 along the conveying rail 22 under the vibration of the linear vibrator 23.

Further, the conveying track 22 includes a first section 221 and a second section 222, where the second section 222 is connected to an end of the first section 221 away from the discharge port 211, that is, the second section 222 is located on an extension line of the first section 221 away from the direction of the vibration plate 21.

The first section 221 includes two L-shaped support plates 2211 disposed opposite to each other at a certain distance, and end surfaces of the two support plates 2211 are used for supporting end surfaces corresponding to the grooves 204 of the skeleton 202 and enabling the pins 201 of the inductor 200 to be located between the two support plates 2211, so that the inductor 200 can be limited on the first section 221 and move towards the second section 222 under the action of the linear vibrator 23.

Further, the first section 221 further includes two limiting plates 2212, where the two limiting plates 2212 are disposed opposite to each other and are limited on opposite sides of the outer side of the skeleton 202.

The support is limited to the first section 221 in a set direction by arranging the support plate 2211 and the limiting plate 2212, so that the cutting mechanism 30 cuts the pins 201 of the inductor 200.

The second section 222 includes two lifting plates 2221, a space 2222 is formed between the two lifting plates 2221 at a certain distance, the pins 201 are located in the space 2222 and at least partially extend out of the space 2222, so that the cutting mechanism 30 cuts a portion of the pins 201 extending out of the space 2222, where the cutting mechanism 30 may cut all of the pins 201 extending out of the second section 222, or cut a portion of the pins 201 extending out of the second section 222, and further, may cut both of the pins 201 into an equal-length structure, or a unequal-length structure during cutting.

In one embodiment, the skeleton 202 is disposed vertically, and one end with the boss 203 faces downward, so that two pins 201 extend downward out of the yielding space 2222.

In other embodiments, the framework 202 may also be horizontally disposed.

Since the length requirements for the pins 201 are different, some inductors 200 need the pins 201 with equal length structures and are different in length, some inductors 200 need the pins 201 with unequal length structures and the length can be adjusted according to the requirements, so that in actual processing, the length of the reserved pins 201 is often required to be adjusted, and the conveying track 22 is set to be in a sectional structure, and the distance between the second section 222 and the cutting mechanism 30 is adjusted to obtain the pins 201 with different lengths.

Referring to fig. 6-9, the cutting mechanism 30 includes a first cutter 31 and a second cutter 32, where the first cutter 31 and the second cutter 32 are disposed opposite to each other to cut a pin 201 of the inductor 200 extending out of the conveying track 22.

In one embodiment, the first cutter 31 and the second cutter 32 are disposed opposite to each other in a horizontal plane.

In another embodiment, the first cutter 31 and the second cutter 32 are disposed opposite to each other in the vertical direction.

In the above two embodiments, the first cutter 31 and/or the second cutter 32 are movable, that is, the first cutter 31 and the second cutter 32 can move relatively; or the first cutter 31 is not movable and the second cutter 32 is movable; or the second cutter 32 is not movable and the first cutter 31 is movable.

Referring to fig. 10, the cutting device 100 further includes a transferring mechanism 40, where the transferring mechanism 40 includes a fork 41, a first driving device 42 and a second driving device 43, the fork 41 is disposed at an output end of the first driving device 42 and implements the forking or releasing of at least one inductor 200 by the first driving device 42, and the first driving device 42 is disposed at an output end of the second driving device 43 and implements the transferring of the fork 41 between the first section 221 and the second section 222 by the second driving device 43.

The fork 41 is used for transferring at least one inductor 200 placed in the set orientation on the first section 221 to the second section 222, so that the cutting mechanism 30 cuts the pin 201 of the inductor 200 located on the second section 222, thereby completing the cutting process of the inductor 200.

In one embodiment, the fork 41 includes fork slots 411 disposed at a certain distance, and each of the fork slots 411 is used for forking one of the inductors 200, for example, when the inductor 200 is an i-inductor 200, the slot is used for forking a middle position of the i-inductor 200.

Further, the transfer mechanism 40 further includes a mounting frame 44, the mounting frame 44 is disposed on the workbench 10, and the second driving device 43 is disposed on the mounting frame 44.

Further, the transfer mechanism 40 further includes a third driving device (not shown), and the second driving device 43 is disposed at an output end of the third driving device and is lifted by the third driving device.

By arranging the third driving device to drive the second driving device 43, the first driving device 42 and the fork 41 to move in the vertical direction, the fork 41 can vertically adjust at least one of the inductors 200 to meet the cutting requirements of the pins 201 with different lengths in the process of transferring the fork from the first section 221 to the second section 222.

The first driving device 42 and the second driving device 43 may be, but not limited to, ball screw motion pairs, electric pushrods, linear cylinders, crank block mechanisms, and the like.

In one embodiment, the third driving device drives the feeding mechanism 20 to lift at the same time. So as to adjust the height of the whole of the feeding mechanism 20 and the transfer mechanism 40 in the vertical direction.

In another embodiment, the transfer mechanism 40 can also be adjusted in height in the vertical direction by means of a further third drive.

Referring to fig. 6-9 in combination with fig. 11, a blocking rod 51 is disposed between the first section 221 and the second section 222, and the blocking rod 51 is used to block or release the inductor 200 between the first section 221 and the second section 222.

Specifically, the blocking rod 51 is disposed at an output end of a telescopic cylinder 52, and when the inductor 200 on the first section 221 needs to be conveyed backward, the telescopic cylinder 52 drives the blocking rod 51 to retract, so that the transferring mechanism 40 transfers the inductor 200 from the first section 221 to the second section 222; when it is not necessary to transfer the inductor 200 on the first section 221 to the second section 222, the stop lever 51 is extended and blocks the inductor 200 on the first section 221 by driving the telescopic cylinder 52.

Further, a guide plate 223 is disposed above the first section 221 along the conveying direction of the conveying track 22, the guide plate 223 includes a guide portion 2231 and a limit portion 2232, and the guide portion 2231 is disposed at one end of the limit portion 2232 away from the second section 222, so that the inductor 200 can be placed more regularly and the placement efficiency of the inductor 200 can be improved when the inductor 200 moves from the vibration plate 21 to the first section 221 by arranging the guide plate 223.

A plurality of sensors 24 are arranged on the guide plate 223 at a certain distance, and the plurality of sensors 24 are respectively used for sensing the arrangement length of the inductors 200 on the first section 221 so as to control the start and stop of the linear vibrator 23 and the vibration disc 21.

In one embodiment, three sensors 24 are disposed on the guide plate 223 at a certain distance, where a first sensor 24 is disposed above the stop lever 51 and is used for monitoring the position of the first inductor 200 blocked by the stop lever 51, a second sensor 24 is disposed at the joint of the guide portion 2231 and the limit portion 2232 and is used for monitoring the position of the first segment 221 corresponding to the joint, and a third sensor 24 is disposed between the first sensor 24 and the second sensor 24 and is used for monitoring the position of the first segment 221 corresponding to the sensor 24.

When the inductance 200 is located at the position of the first section 221 corresponding to the second sensor 24, the number of the inductances 200 to be cut on the first section 221 is larger than a preset value, and at this time, the linear vibrator 23 and the vibration plate 21 are suspended under the control of the controller 60.

When the first sensor 24 and/or the third sensor 24 does not detect the inductance 200, the controller 60 controls the linear vibrator 23 and the vibration plate 21 to simultaneously start supplying the inductance 200 in the vibration plate 21 to the first section 221 in the set direction.

Further, in one embodiment, the first cutter 31 is provided with at least one relief groove 311, and when cutting, one of the pins 201 of the inductor 200 is located in the relief groove 311, so as to cut the pins 201 with unequal length structures; or, during cutting, two pins 201 adjacent to each other of the inductor 200 are located in the relief groove 311, so as to improve the cutting efficiency of the pins 201 with unequal length structures. The relief groove 311 may be disposed on the second cutter 32.

In another embodiment, the relief groove 311 is not provided in both the first and second cutters 31, 311, so that the cut pins 201 have an equal length structure.

Further, the cutting mechanism 30 further includes a base 33, a fourth driving device 34, a first blade holder 35, and a second blade holder 36, where the base 33 is disposed on the workbench 10 in a liftable manner, the first blade holder 35 is disposed at an output end of the fourth driving device 34, the first blade 31 is disposed on the first blade holder 35, the second blade holder 36 is disposed on the base 33, and the second blade holder 32 is disposed on the second blade holder 36.

By arranging the base 33 to be liftable, the height of the cutting mechanism 30 as a whole can be adjusted in the vertical direction, so as to meet the cutting requirements of the pins 201 with different lengths.

In one embodiment, the base 33 is height-adjustable in the vertical direction by means of a further third drive.

In another embodiment, the base 33 includes a mounting plate 331, a guide rod 332, a guide sleeve 333 and a screw 334, the guide rod 332 is adapted to the guide sleeve 333, wherein, the guide rod 332 and the guide sleeve 333 are respectively provided with a plurality of groups, the guide rod 332 is vertically arranged, one end of each guide rod 332 is respectively and fixedly connected with the workbench 10, the guide sleeve 333 is arranged on the mounting plate 331, the screw 334 is also vertically arranged, one end of the screw 334 is connected with the workbench 10 and can rotate relative to the workbench 10, a threaded part of the screw 334 is in threaded connection with the mounting plate 331, and the mounting plate 331 is enabled to realize height adjustment under the actions of the screw 334, the guide rod 332 and the guide sleeve 333 by rotating the screw 334, so as to realize height adjustment of the cutting mechanism 30.

Further, the cutting mechanism 30 further includes two support plates 37, the two support plates 37 are disposed on the second tool rest 36 at a certain distance, two ends of each of the lifting plates 2221 are respectively disposed on one of the support plates 37, and the positions of the two lifting plates 2221 in the height direction are changed by changing the positions of the support plates 37 in the vertical direction.

In one embodiment, each of the support plates 37 is provided with an adjustment slot 371, and a fixing member is connected to the second tool holder 36 through the adjustment slot 371, and the position of the support plate 37 on the second tool holder 36 is changed by changing the position of the fixing member in the adjustment slot 371. The adjusting groove 371 may be vertically disposed or may be obliquely disposed.

When it is required to change the cutting length of the lead 201 while keeping the first section 221 and the second section 222 on the same horizontal plane so as to facilitate the transfer of the inductor 200 by the transfer mechanism 40, the overall height of the cutting mechanism 30 may be reduced, and the heights of the two lifting plates 2221 may be raised so that the second section 222 is leveled with the first section 221.

Referring to fig. 2 again, a chute 70 is further provided at an end of the second section 222 away from the first section 221, and after the cutting of the pin 201 is completed, the inductor 200 to be cut is pushed backward and finally slides out along the chute 70 to realize blanking while the transfer mechanism 40 transfers the next inductor 200.

Further, the bottom of the cutting mechanism 30 is further provided with a collecting box 80, and the collecting box 80 is used for collecting the cut pin wires.

In the description and claims of this application, the words "comprise/comprising" and the words "have/include" and variations thereof are used to specify the presence of stated features, values, steps, or components, but do not preclude the presence or addition of one or more other features, values, steps, components, or groups thereof.

Some features of the utility model, which are, for clarity of illustration, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, some features of the utility model, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable combination in different embodiments.

The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. An inductor pin cutting device, characterized in that the cutting device includes:

a work table;

the feeding mechanism is arranged on the workbench and comprises a vibrating disc and a conveying rail, one end of the conveying rail is communicated with a discharge hole of the vibrating disc, the vibrating disc is used for conveying an inductor to the conveying rail according to a set direction, and pins of the inductor at least partially extend out of the conveying rail;

the cutting mechanism is arranged on the workbench and located at the rear of the feeding mechanism, and comprises a first cutter and a second cutter, wherein the first cutter and the second cutter are oppositely arranged and used for cutting pins of the conveying track, and the pins extend out of the conveying track.

2. The inductance pin cutting device according to claim 1, wherein the conveying track comprises a first section and a second section, the second section is connected to one end of the first section far away from the discharge port, the second section comprises two lifting plates, a space is formed between the two lifting plates at a certain distance, and the pins are located in the space and at least partially extend out of the space.

3. The inductor pin cutting device of claim 2, further comprising a transfer mechanism, wherein the transfer mechanism comprises a fork, a first driving device and a second driving device, the fork is disposed at an output end of the first driving device and is used for realizing the fork taking or releasing of at least one inductor through the first driving device, and the first driving device is disposed at an output end of the second driving device and is used for realizing the transfer of the fork between the first section and the second section through the second driving device.

4. An inductor pin cutting device according to claim 3, wherein the transfer mechanism further comprises a third driving device, and the second driving device is disposed at an output end of the third driving device and is lifted by the third driving device.

5. The inductance pin cutting device according to claim 4, wherein the third driving device drives the feeding mechanism to lift at the same time.

6. An inductor pin cutting apparatus as claimed in any one of claims 2 to 5 wherein a stop lever is provided between the first and second sections.

7. The inductance pin cutting device according to claim 6, wherein a guide plate is arranged above the first section along the conveying direction of the conveying track, the guide plate comprises a guide portion and a limit portion, the guide portion is arranged at one end of the limit portion far away from the second section, a plurality of sensors are arranged on the guide plate at intervals, and the sensors are respectively used for sensing the arrangement length of the inductances on the first section.

8. The device of claim 6, wherein the first cutter is provided with at least one relief groove, and one of the pins of the inductor is positioned in the relief groove during cutting; or when cutting, two pins adjacent to the inductor are positioned in the yielding groove.

9. The inductance pin cutting device according to claim 6, wherein the cutting mechanism further comprises a base, a fourth driving device, a first cutter holder and a second cutter holder, the base is arranged on the workbench in a lifting manner, the first cutter holder is arranged at the output end of the fourth driving device, the first cutter is arranged on the first cutter holder, the second cutter holder is arranged on the base, and the second cutter is arranged on the second cutter holder.

10. The device of claim 9, wherein the cutting mechanism further comprises two support plates, the two support plates are disposed on the second tool holder at a certain distance, two ends of each lifting plate are respectively disposed on one support plate, an adjusting slot is disposed on each support plate, a fixing member passes through the adjusting slot and is connected with the second tool holder, and the position of the fixing member in the adjusting slot is changed to change the position of the support plate on the second tool holder.