Press foot device and circuit board processing equipment

Abstract

The utility model discloses a presser foot device and circuit board processing equipment, the presser foot device comprises a scrap suction cover body, a presser foot assembly and a driving assembly, the scrap suction cover body is provided with a through hole, the presser foot assembly comprises a sliding plate, a first presser foot and a second presser foot, the sliding plate is movably connected with the scrap suction cover body, the first presser foot and the second presser foot are respectively arranged on the sliding plate, and the driving assembly is arranged on the sliding plate. The driving assembly comprises a driving piece and an elastic rod, the driving piece is connected with the scrap suction cover body, one end of the elastic rod is connected with the driving piece, the other end of the elastic rod is connected with the sliding plate, and the driving assembly is used for driving the sliding plate to move between the first position and the second position relative to the scrap suction cover body. The driving piece is connected with the sliding plate through the elastic rod, and the elastic rod has flexibility and toughness, so that the elastic rod has stretching rigidity while having pulling rigidity, the driving piece can pull the sliding plate to move or push the sliding plate to move through the elastic rod, the purpose of switching the presser foot is achieved, and the presser foot switching mechanism is simple in structure and low in cost.

Description

Technical Field

[0001] This application relates to the technical field of circuit board processing, and particularly relates to a pressing foot device and a circuit board processing equipment. Background Art

[0002] There are mainly two types of pressing foot switching devices for PCB mechanical drilling machines: one is the flat-pushing type pressing foot switching, in which the large and small pressing feet are unified on the same pressing foot, that is, the large and small pressing feet are the same. In this way, when drilling small holes, there will be a problem that the pressing state is not ideal; the other is the full pressing foot type switching, in which the large pressing foot is used for drilling large holes and tool changing, and the small pressing foot is used for drilling small holes, which can improve the processing accuracy and quality of micro holes and small holes.

[0003] Currently, the full pressing foot type switching is generally adopted in the market, which drives the steel wire to move through a driving component to complete the switching of the large and small pressing feet. Because the large and small pressing feet need to be switched back and forth, the steel wire needs to have the stiffness of pulling and the stiffness of stretching. Otherwise, the switching of the large and small pressing feet will not be in place. However, ordinary steel wires (lassos) only have the stiffness of pulling, and the stiffness of stretching is insufficient. For example, the brake wires of bicycles and motorcycles, the steel wire rope is composed of multiple fine steel wires twisted together, and then a sheath is sleeved outside. The existence of the sheath enables the steel wire to change the direction of force transmission according to the direction of the sheath. In addition, because the sheath restricts the steel wire, the steel wire is not easy to spread, and adding the sheath increases the cost. The aviation-grade steel wire (lasso) has the stiffness of pulling and the stiffness of stretching. The internal steel wire is composed of movable steel wires and outer ring steel wires. The outer ring steel wires play a role in strengthening the strength and the stiffness of stretching of the steel wire. There is also a sheath outside the steel wire, and the role of the sheath is also to limit the movement space of the steel wire. Without the sheath, the internal steel wire cannot transmit the pulling force or the stretching force in the required changing direction. Because the manufacturing process is complex, the price of the aviation-grade steel wire is expensive. Summary of the Utility Model

[0004] In order to overcome the problems existing in the above-mentioned prior art, the main purpose of this application is to provide a pressing foot device and a circuit board processing equipment with a simple connection structure and low cost.

[0005] In order to achieve the above purpose, this application specifically adopts the following technical solutions:

[0006] This application provides a pressing foot device, and the pressing foot device includes:

[0007] A chip suction cover body, and the chip suction cover body is provided with a through hole;

[0008] A pressing foot assembly, the pressing foot assembly includes a slide plate, a first pressing foot and a second pressing foot, the slide plate is movably connected to the chip suction cover body, and the first pressing foot and the second pressing foot are respectively arranged on the slide plate;

[0009] A driving component, the driving component includes a driving member and an elastic rod, the driving member is connected to the chip suction cover body, one end of the elastic rod is connected to the driving member, and the other end of the elastic rod is connected to the sliding plate;

[0010] The driving component is used to drive the sliding plate to move relative to the chip suction cover body between a first position and a second position, so that the first pressing foot is aligned with the through hole or the second pressing foot is aligned with the through hole.

[0011] In the present application, the driving member is connected to the sliding plate through an elastic rod. The elastic rod has both the stiffness of pulling and the stiffness of stretching. Furthermore, the driving member can pull the sliding plate to move or push the sliding plate to move through the elastic rod, achieving the purpose of switching the first pressing foot and the second pressing foot. Its structure is simple and the cost is low.

[0012] In some embodiments, the elastic rod includes a first end portion, a second end portion and a connecting portion. The two ends of the connecting portion are respectively connected to the first end portion and the second end portion. The first end portion is movably connected to the sliding plate, and the second end portion is connected to the driving member.

[0013] In some embodiments, the cross-sectional areas of the first end portion and the second end portion are larger than the cross-sectional area of the connecting portion. In this embodiment, by making the cross-sectional areas of both the first end portion and the second end portion larger than the cross-sectional area of the connecting portion, the elastic deformation of the elastic rod can be controlled through the structural design of the elastic rod, making the pushing and pulling process of the elastic rod smoother.

[0014] In some embodiments, the driving member is provided as a cylinder. The cylinder includes a piston rod, and the second end portion is connected to the piston rod. In this embodiment, by connecting the elastic rod to the piston rod, the connection method is simple and the disassembly and assembly are convenient.

[0015] In some embodiments, the length of the elastic rod is greater than or equal to the movement stroke of the sliding plate relative to the chip suction cover body, and the length of the elastic rod is less than or equal to the length of the sliding plate.

[0016] In this embodiment, by making the length of the elastic rod not exceed the length of the sliding plate, the stiffness of the elastic rod is ensured. At the same time, by making the length of the elastic rod not less than the movement stroke of the sliding plate relative to the chip suction cover body, the pushing and pulling stroke is ensured to be sufficient, so as to ensure that the pressing foot is switched in place.

[0017] In some embodiments, the pressing foot device further includes a limiting component. The limiting component includes a first limiting member and a second limiting member. The first limiting member is connected to the chip suction cover body and is located at one end of the sliding plate. The second limiting member is connected to the chip suction cover body and is located at the other end of the sliding plate. The first limiting member and the second limiting member are respectively used to limit the movement of the sliding plate.

[0018] In this embodiment, through the arrangement of the first limiting member and the second limiting member, the moving position of the slide plate is restricted, ensuring the stability of the concentricity between the first pressure foot and the second pressure foot and the main shaft after switching.

[0019] In some embodiments, the first limiting member is further provided with a groove, and the elastic rod is mounted in the groove. In this embodiment, by providing the groove, the elastic rod can be limited through the groove, improving the stability of the movement of the elastic rod.

[0020] In some embodiments, both the first limiting member and the second limiting member can be adjusted in height along the height direction of the chip suction hood body, and inclined surfaces are provided on the sides of the first limiting member and the second limiting member facing the slide plate, and at least part of the inclined surfaces are arranged opposite to the pressure foot assembly. In this application embodiment, by enabling both the first limiting member and the second limiting member to be adjusted in height relative to the chip suction hood body, and inclined surfaces are provided on the sides of the first limiting member and the second limiting member facing the slide plate, the position of the movement switching of the slide plate can be conveniently adjusted, ensuring the stability of the concentricity between the first pressure foot and the second pressure foot and the main shaft after switching, thereby ensuring that the chip suction hood body is not pressed obliquely, and further ensuring the processing quality of the circuit board.

[0021] In some embodiments, the first limiting member and the second limiting member are respectively provided with waist-shaped holes, and the pressure foot device further includes a limiting portion passing through the waist-shaped holes and connected to the chip suction hood body, and the diameter of the limiting portion along the height direction of the chip suction hood body is smaller than the diameter of the waist-shaped holes along the height direction of the chip suction hood body. In this embodiment, by enabling the first limiting member and the second limiting member to be respectively provided with waist-shaped holes, the connection positions of the first limiting member and the second limiting member and the chip suction hood body can be conveniently adjusted up and down, and further the limiting positions of the slide plate can be adjusted.

[0022] In some embodiments, the first limiting member is provided with two of the waist-shaped holes, and the two waist-shaped holes are arranged at intervals along the width direction of the first limiting member. In this embodiment, by enabling the first limiting member to be provided with two waist-shaped holes, the first limiting member can be connected to the chip suction hood body through the two waist-shaped holes, improving the connection stability between the first limiting member and the chip suction hood body.

[0023] In some embodiments, the second limiting member is provided with two of the waist-shaped holes, and the two waist-shaped holes are arranged at intervals along the height direction of the second limiting member. In this embodiment, by enabling the second limiting member to be provided with two waist-shaped holes, the second limiting member can be connected to the chip suction hood body through the two waist-shaped holes, improving the connection stability between the second limiting member and the chip suction hood body.

[0024] Accordingly, the present application further provides a circuit board processing device, including a device body, a main shaft, a tool, a workbench, and a pressing foot device as described in any of the above embodiments. The main shaft and the pressing foot device are respectively connected to the device body and located above the workbench, and the tool is connected to the main shaft and can pass through the pressing foot device.

[0025] The pressing foot device of the present application includes a chip suction cover body, a pressing foot assembly, and a driving assembly. The chip suction cover body is provided with a through hole. The pressing foot assembly includes a sliding plate, a first pressing foot, and a second pressing foot. The sliding plate is movably connected to the chip suction cover body. The first pressing foot and the second pressing foot are respectively arranged on the sliding plate. The driving assembly includes a driving member and an elastic rod. The driving member is connected to the chip suction cover body. One end of the elastic rod is connected to the driving member, and the other end of the elastic rod is connected to the sliding plate. The driving assembly is used to drive the sliding plate to move relative to the chip suction cover body between a first position and a second position, so that the first pressing foot is aligned with the through hole or the second pressing foot is aligned with the through hole. Compared with the prior art, the driving member of the present application is connected to the sliding plate through the elastic rod. The elastic rod has both the stiffness of pulling and the stiffness of stretching. Therefore, the driving member can pull the sliding plate to move or push the sliding plate to move through the elastic rod, achieving the purpose of switching the pressing foot. Its structure is simple, the cost is low, and the reliability is high and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a side view of the pressing foot device provided by an embodiment of the present application.

[0027] Figure 2 It is a bottom view of the pressing foot device provided by an embodiment of the present application.

[0028] Figure 3 It is an exploded perspective view of the pressing foot device provided by an embodiment of the present application.

[0029] Figure 4 It is another perspective exploded perspective view of the pressing foot device provided by an embodiment of the present application.

[0030] Figure 5 It is a top view of the pressing foot device provided by an embodiment of the present application.

[0031] Figure 6 It is a cross-sectional view of the pressing foot device provided by an embodiment of the present application in the first state.

[0032] Figure 7 It is a cross-sectional view of the pressing foot device provided by an embodiment of the present application in the second state.

[0033] Figure 8 is Figure 4 a perspective view of the elastic rod in

[0034] Figure 9 is Figure 1Right view of the medium pressure foot device.

[0035] Figure 10 is Figure 1 the sectional view at H-H in

[0036] Figure 11 Schematic diagram of the contact state structure between the elastic rod and the sliding plate when the elastic rod provided by the embodiment of the present application is in a stretched state.

[0037] Figure 12 Schematic diagram of the contact state structure between the elastic rod and the sliding plate when the elastic rod provided by the embodiment of the present application is in a compressed state.

[0038] Reference signs in the drawings:

[0039] 1. Chip suction hood body; 11. Chute; 111. First arc surface; 12. Through hole; 13. Second arc surface; 2. Pressure foot assembly; 21. Sliding plate; 211. Assembly cavity; 212. Notch part; 22. First pressure foot; 23. Second pressure foot; 24. First pressing plate; 25. Second pressing plate; 3. Driving assembly; 31. Mounting seat; 32. Cylinder; 321. Piston rod; 33. Elastic rod; 331. First end; 332. Second end; 333. Connecting part; 4. Limiting assembly; 41. First limiting member; 411. Groove; 42. Second limiting member; 421. Inclined surface; 400. Waist-shaped hole; 100. Pressure foot device. Detailed implementation manners

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] In the description of the present application, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; unless otherwise specified or stated, the term "plurality" means two or more, and the term "multiple types" means two or more types; the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0042] In the description of this specification, it should be understood that the orientation terms such as "upper" and "lower" described in the embodiments of this application are described from the angles shown in the drawings and should not be construed as limitations on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component.

[0043] This application discloses a circuit board processing device. The circuit board processing device can be, for example, a drilling machine. The drilling machine can be used to drill holes in the circuit board so that cylindrical holes are formed in the circuit board, thus facilitating subsequent installation work. The drilling machine generally includes a device body, a main shaft, a tool, a workbench, and a pressure foot device. The workbench is used to carry the circuit board to be processed. The main shaft and the pressure foot device are respectively movably connected to the device body and are located above the workbench. The tool is connected to the main shaft and can pass through the pressure foot device. When processing the circuit board (PCB board), the pressure foot device can be driven by the telescopic mechanism of the drilling machine to move downward and press against the circuit board to be processed, and then the tool (drill bit) in the drilling machine can pass through the pressure foot device to process the circuit board to be processed, such as drilling.

[0044] Referring to Figure 1 and Figure 2 As shown, the pressure foot device 100 includes a chip suction cover body 1, a pressure foot assembly 2, and a driving assembly 3. The chip suction cover body 1 is movably connected to the device body, and the pressure foot assembly 2 is movably connected to the chip suction cover body 1. The driving assembly 3 is arranged on the chip suction cover body 1, and the driving assembly 3 is connected to the pressure foot assembly 2. The driving assembly 3 is used to drive the pressure foot assembly 2 to move relative to the chip suction cover body 1 so that the pressure foot assembly 2 has a first state and a second state. When the pressure foot assembly 2 is in the first state, the tool can pass through one of the pressure feet to process the circuit board. When the pressure foot assembly 2 is in the second state, the tool can pass through the other pressure foot to process the circuit board.

[0045] Referring to Figure 3 and Figure 4As shown in the figure, the chip suction hood body 1 is provided with a chute 11 and a through hole 12, and the through hole 12 is located at the bottom wall of the chute 11. The pressure foot assembly 2 includes a sliding plate 21, a first pressure foot 22, a second pressure foot 23, a first pressing plate 24 and a second pressing plate 25. The sliding plate 21 is slidably disposed in the chute 11, so that the sliding plate 21 can have a first position and a second position relative to the chip suction hood body 1. The first pressing plate 24 and the second pressing plate 25 are respectively connected to both sides of the chip suction hood body 1, and the first pressing plate 24 and the second pressing plate 25 are also respectively pressed against both sides of the sliding plate 21, so as to limit both sides of the sliding plate 21 respectively through the first pressing plate 24 and the second pressing plate 25, preventing the sliding plate 21 from disengaging from the chute 11. The first pressure foot 22 and the second pressure foot 23 are respectively and spacedly disposed on the sliding plate 21. When the sliding plate 21 is in the first position, the first pressure foot 22 is aligned with the through hole 12. At this time, the tool can pass through the first pressure foot 22 to process the circuit board; when the sliding plate 21 is in the second position, the second pressure foot 23 is aligned with the through hole 12. At this time, the tool can pass through the second pressure foot 23 to process the circuit board.

[0046] Specifically, the chute 11 is provided as an arc-shaped structure, its bottom wall is provided as a first arc surface 111, and second arc surfaces 13 are respectively provided on both sides of the chip suction hood body 1. The radian of the second arc surface 13 is the same as that of the first arc surface 111, that is, the second arc surface 13 and the first arc surface 111 are concentric arc surfaces, and the through hole 12 is located in the middle of the first arc surface 111. The sliding plate 21 is provided as an arc-shaped structure, and the radian of the sliding plate 21 matches the radian of the first arc surface 111, so that the arc-shaped sliding plate 21 can slide along the first arc surface 111. The first pressing plate 24 and the second pressing plate 25 are also respectively provided as arc-shaped structures, and the radian of the first pressing plate 24 and the second pressing plate 25 matches the radian of the second arc surface 13, so that the first pressing plate 24 and the second pressing plate 25 are respectively attached to the second arc surfaces 13 on both sides of the chip suction hood body 1, so that the sliding plate 21 can slide in the arc-shaped space formed by the chip suction hood body 1, the first pressing plate 24 and the second pressing plate 25.

[0047] In this embodiment, a first step is formed at the junction of the first arc surface 111 and the second arc surface 13, and second steps are respectively provided on both sides of the sliding plate 21. During assembly, the sliding plate 21 is disposed in the chute 11, and both sides of the sliding plate 21 are respectively in contact with the first steps on both sides of the chip suction hood body 1. The first pressing plate 24 and the second pressing plate 25 are respectively connected to both sides of the chip suction hood body 1, and the first pressing plate 24 and the second pressing plate 25 are in contact with the second steps on both sides of the sliding plate 21. Through the setting of the first step and the second step in this embodiment, the contact area between the sliding plate 21 and the chip suction hood body 1, the first pressing plate 24 and the second pressing plate 25 is reduced, thereby reducing the frictional resistance and making the movement of the sliding plate smoother.

[0048] Refer to Figure 5As shown, the driving component 3 includes a mounting base 31, a driving member, and an elastic rod 33. The mounting base 31 is connected to the chip suction hood body 1, and the driving member is installed on the mounting base 31. In this embodiment, the driving member is a cylinder 32, and the cylinder 32 includes a piston rod 321. One end of the elastic rod 33 is connected to the piston rod 321 of the cylinder 32, and the other end of the elastic rod 33 is connected to the sliding plate 21. Thus, the cylinder 32 can drive the sliding plate 21 to slide relative to the chip suction hood body 1 within the arc-shaped space formed by the chip suction hood body 1, the first pressing plate 24, and the second pressing plate 25, so that the sliding plate 21 moves between the first position and the second position, thereby aligning the first pressing foot 22 with the through hole 12, or aligning the second pressing foot 23 with the through hole 12, that is, switching the first pressing foot 22 and the second pressing foot 23 for operation. Among them, the material of the elastic rod 33 is preferably a metal material, such as steel material, so that the elastic rod 33 has flexibility and toughness, that is, the elastic rod has elasticity, so that the elastic rod can generate elastic deformation, and at the same time the elastic rod also has rigidity, so that the elastic deformation of the elastic rod will not be too large. Of course, the material of the elastic rod 33 can also be other elastic materials.

[0049] Exemplarily, the first pressing foot 22 and the second pressing foot 23 can be pressing feet with different specifications. When the sliding plate 21 moves to the first position, the first pressing foot 22 is in the working position. At this time, the tool can pass through the first pressing foot 22 to complete the drilling operation, such as drilling small holes; when the sliding plate 21 moves to the second position, the second pressing foot 23 is in the working position. At this time, tool change, tool grasping, or drilling large holes can be completed. Refer to Figure 6 and Figure 7 shown.

[0050] In this embodiment, the cylinder 32 is connected to the sliding plate 21 through the elastic rod 33, so that the elastic rod 33 can absorb the offset moment generated by the piston rod of the cylinder during the driving process, thereby reducing the wear of the piston rod 321 and increasing the service life of the cylinder 32.

[0051] Refer to Figure 8 shown, the elastic rod 33 includes a first end 331, a second end 332, and a connecting portion 333. The two ends of the connecting portion 333 are respectively connected to the first end 331 and the second end 332. The first end 331 is movably connected to the sliding plate 21, and the second end 332 is connected to the cylinder 32. In this embodiment, the first end 331, the second end 332, and the connecting portion 333 are integrally formed, and the cross-sectional areas of the first end 331 and the second end 332 are both larger than the cross-sectional area of the connecting portion 333. In this embodiment, the elastic deformation of the elastic rod 33 can be controlled through the structural design of the elastic rod 33, so that the pushing and pulling process of the elastic rod 33 is smoother.

[0052] In some examples, the diameter of the connection portion 333 is 1 mm to 5 mm, and specifically, the diameter of the connection portion 333 may be 1 mm, 1.8 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, etc. In this embodiment, the diameter of the connection portion 333 of the elastic rod is set to 1 mm to 5 mm, thereby ensuring that the elastic rod has pulling force and stretching force while avoiding material waste.

[0053] In order to facilitate assembly, the slide plate 21 is provided with an assembly cavity 211, which is a cylindrical cavity, and an opening is provided on one side of the assembly cavity 211 facing the bottom wall of the slide groove 11. The side wall of the slide plate 21 is provided with a notch 212, which is connected to the assembly cavity 211, and the width of the notch 212 is smaller than the diameter of the convex ball portion. The end of the piston rod 321 is provided with a threaded connection hole. The first end 331 of the elastic rod 33 is set as a convex ball portion, and the second end 332 of the elastic rod 33 is set as a threaded connection portion 333. During assembly, the threaded connection portion 333 of the elastic rod 33 can be threadedly connected with the threaded connection hole of the piston rod 321, so that the convex ball portion of the elastic rod 33 can enter the assembly cavity 211 from the opening and be accommodated in the assembly cavity 211, so that the first end 331 of the elastic rod 33 and the slide plate 21 are matched with a high clearance, and the connection portion 333 is penetrated through the notch 212. At this time, due to the restrictions of the slide plate 21 and the first curved surface 111 of the dust collecting cover body 1, the convex ball portion of the elastic rod 33 will be restricted in the assembly cavity 211 and cannot automatically escape from the assembly cavity 211. In some embodiments, the elastic rod 33 and the slide plate 21 can also be hingedly connected, for example, the elastic rod 33 is hingedly connected to the side wall of the slide plate 21.

[0054] Illustratively, when the cylinder pushes the elastic rod 33 to move the cylinder piston to the top of the cylinder body and the slide plate 21 abuts against the second limit member, the matching depth of the internal thread of the elastic rod 33 and the piston rod 321 can be adjusted, so that when the second pressure foot 23 is moved into place, the elastic rod 33 has a slight elastic compression, and the slight elastic compression forms a stretching force to ensure that the slide plate 21 is reliably abutted against the second limit member. At this time, since the elastic rod 33 is elastically compressed, it is within the range of elastic deformation and the problem of elastic yield will not occur.

[0055] Specifically, the elastic rod 33 is a slender flexible structure, and the length of the elastic rod 33 is greater than or equal to the movement stroke of the slide plate 21 in the chute 11. Preferably, the length of the elastic rod 33 is equal to the active stroke of the slide plate 21. Because, if the length of the elastic rod 33 is too short, the pushing and pulling stroke is insufficient. At the same time, the length of the elastic rod 33 is less than or equal to the length of the slide plate 21, because the length of the elastic rod 33 should not be too long. If the elastic rod 33 is too long, its stiffness is poor and it is too easy to change the direction of the force, causing the elastic rod 33 to undergo large buckling deformation, which may lead to the slide plate 21 not switching in place. In some embodiments, the specific length of the elastic rod 33 can be set according to actual situations. In this embodiment, by setting the elastic rod 33 as a slender flexible structure, a large offset moment force will not be generated on the cylinder piston.

[0056] Continue to refer to Figure 6 and Figure 7 As shown, when the cylinder 32 contracts the piston rod 321, the piston rod 321 stretches the elastic rod 33, thereby pulling the slide plate 21 to move to the first position through the elastic rod 33, so that the first pressing foot 22 is aligned with the through hole 12. When the cylinder 32 extends the piston rod 321, the piston rod 321 pushes the elastic rod 33, thereby pushing the slide plate 21 to move to the second position through the elastic rod 33, so that the second pressing foot 23 is aligned with the through hole 12.

[0057] In this embodiment, the cylinder 32 is connected to the slide plate 21 through the elastic rod 33, so that the offset moment force received by the piston rod 321 of the cylinder 32 caused by the switching of the first pressing foot 22 and the second pressing foot 23 can be absorbed through the elastic rod 33, thereby greatly reducing the abnormal wear of the cylinder piston rod. At the same time, by making the convex spherical portion of the elastic rod 33 and the slide plate 21 have a high pair clearance fit, the elastic rod 33 can have a slight elastic compression, so that the convex spherical portion of the elastic rod 33 can have a moving space in the assembly cavity 211 of the slide plate 21, thereby reducing the offset moment force of the elastic rod 33 on the cylinder piston rod, reducing the eccentric wear of the cylinder, improving the life and performance of the cylinder, and reducing the cost of replacement and maintenance.

[0058] Refer to Figure 9 and Figure 10 As shown, in order to limit the moving position of the slide plate 21, the pressing foot device 100 further includes a limiting assembly 4. The limiting assembly 4 includes a first limiting member 41 and a second limiting member 42. The first limiting member 41 is connected to the chip suction hood body 1 and is located at one end of the slide plate 21, and the second limiting member 42 is connected to the chip suction hood body 1 and is located at the other end of the slide plate 21, so as to be able to limit the moving position of the slide plate 21 through the first limiting member 41 and the second limiting member 42. In this embodiment, through the arrangement of the first limiting member 41 and the second limiting member 42, the slide plate 21 can be limited.

[0059] In order to improve the stability of the concentricity between the first presser foot 22 and the second presser foot 23 and the main shaft after switching, both the first limiting member 41 and the second limiting member 42 can be adjusted in height in the height direction of the chip suction hood body 1 relative to the chip suction hood body 1, and inclined surfaces 421 are provided on one side of the first limiting member 41 and the second limiting member 42 facing the slide plate 21, and at least part of the inclined surfaces 421 are arranged opposite to the presser foot assembly 2. The inclined surfaces 421 can be used to limit the slide plate 21. Thus, by adjusting the heights of the first limiting member 41 and the second limiting member 42, the movement stroke of the slide plate 21 can be adjusted, and further the concentric state between the first presser foot 22, the second presser foot 23 and the main shaft after switching can be adjusted.

[0060] Exemplarily, when the slide plate 21 moves to the first position and the first presser foot 22 is in a concentric state with the through hole 12, the height of the first limiting member 41 is adjusted so that the first limiting member 41 just abuts against the slide plate 21. Then the position where the first limiting member 41 is located at this time can ensure the concentricity between the first presser foot 22 and the through hole 12; when the slide plate 21 moves to the second position and the second presser foot 23 is in a concentric state with the through hole 12, the height of the second limiting member 42 is adjusted so that the second limiting member 42 just abuts against the slide plate 21. Then the position where the second limiting member 42 is located at this time can ensure the concentricity between the second presser foot 23 and the through hole 12. That is, during the movement of the slide plate 21 after the heights of the first limiting member 41 and the second limiting member 42 are adjusted as above, when the slide plate 21 moves to abut against the first limiting member 41, the first presser foot 22 is concentric with the through hole 12, and when the slide plate 21 moves to abut against the second limiting member 42, the second presser foot 23 is concentric with the through hole 12. Therefore, in this embodiment, by setting the first limiting member 41 and the second limiting member 42 to be height-adjustable and providing inclined surfaces on the first limiting member 41 and the second limiting member 42, the position of the movement switching of the slide plate 21 can be conveniently adjusted, the stability of the concentricity between the first presser foot 22, the second presser foot 23 and the main shaft after switching can be ensured, so as to ensure that the chip suction hood body 1 is not pressed out of alignment, and further ensure the processing quality of the circuit board.

[0061] Specifically, the limiting assembly 4 further includes a plurality of limiting parts. The first limiting member 41 is provided with a groove 411 and two waist-shaped holes 400. The elastic rod 33 is arranged in the groove 411. The two waist-shaped holes 400 provided on the first limiting member 41 are along the width direction of the first limiting member 41 ( Figure 10are arranged at intervals in the X direction (in the figure). The limiting part passes through the waist-shaped hole 400 on the first limiting member 41 and is connected to the chip suction hood body 1, so that the first limiting member 41 is connected to the chip suction hood body 1. The second limiting member 42 is provided with two waist-shaped holes 400, and the two waist-shaped holes 400 provided on the second limiting member 42 are arranged at intervals along the height direction of the second limiting member 42. The limiting part passes through the waist-shaped hole 400 on the second limiting member 42 and is connected to the chip suction hood body 1, so that the second limiting member 42 is connected to the chip suction hood body 1. Wherein, the diameter of each limiting part along the height direction of the chip suction hood body 1 is smaller than the diameter of each corresponding waist-shaped hole 400 along the height direction of the chip suction hood body 1.

[0062] Exemplarily, the limiting part can be set as a screw. The first end of the chip suction hood body 1 is provided with a first threaded hole, and the second end of the chip suction hood body 1 is provided with a second threaded hole. During assembly, the screw can be passed through the waist-shaped hole 400 of the first limiting member 41 and threadedly connected to the first threaded hole, so that the first limiting member 41 is detachably connected to the first end of the chip suction hood body 1; the screw can be passed through the waist-shaped hole 400 of the second limiting member 42 and threadedly connected to the second threaded hole, so that the second limiting member 42 is detachably connected to the second end of the chip suction hood body 1. In this embodiment, by detachably connecting the first limiting member 41 and the second limiting member 42 to the chip suction hood body 1, the replacement and position adjustment of the first limiting member 41 and the second limiting member 42 are facilitated.

[0063] When adjusting the height of the first limiting member 41, the first limiting member 41 can be moved up and down to a suitable position, and then the screw can be passed through the waist-shaped hole 400 of the first limiting member 41 and threadedly connected to the first threaded hole to fix the first limiting member 41 at this position. When adjusting the height of the second limiting member 42, the second limiting member 42 can be moved up and down to a suitable position, and then the screw can be passed through the waist-shaped hole 400 of the second limiting member 42 and threadedly connected to the second threaded hole to fix the second limiting member 42 at this position.

[0064] In this embodiment, by providing waist-shaped holes in both the first limiting member 41 and the second limiting member 42, the connection positions of the first limiting member 41 and the second limiting member 42 to the chip suction hood body 1 can be conveniently adjusted up and down, and further the heights of the first limiting member 41 and the second limiting member 42.

[0065] In practical applications, refer to Figure 6 and Figure 11As shown, when the air cylinder 32 stretches the elastic rod 33 to move the slide plate 21 until it abuts against the first limiting member 41, the first presser foot 22 is in the working position. At this time, the elastic rod 33 is subjected to a tensile force. Since the convex spherical portion of the elastic rod 33 and the slide plate 21 are in a high pair clearance fit, the convex spherical portion of the elastic rod 33 abuts against two contact surfaces of the assembly cavity 211 of the slide plate 21 close to the air cylinder 32. At the same time, the slide plate 21 remains in a state of abutting against the first limiting member 41, thereby ensuring that the first presser foot 22 is concentrically arranged with the spindle center. In addition, when the elastic rod 33 is subjected to a tensile force to make the slide plate 21 abut against the first limiting member 41, the air cylinder 32 still needs to have a moving stroke. The fact that the air cylinder 32 still needs to have a moving stroke at this time is to ensure that the elastic rod 33 is in a stretched state. In this embodiment, the high pair clearance fit between the elastic rod 33 and the slide plate 21 is provided to enable the elastic rod 33 to recover from the elastically compressed state to the stretched state, reduce the stress inside the elastic rod 33, thereby improving the service life and reliability of the presser foot device 100 and reducing the cost of replacing and repairing parts.

[0066] Referring to Figure 7 and Figure 12 As shown, when the air cylinder pushes the elastic rod 33 to move the piston rod 321 of the air cylinder 32 to the top of the air cylinder cavity, the slide plate 21 abuts against the second limiting member 42. At this time, the convex spherical portion of the elastic rod 33 abuts against two contact surfaces of the assembly cavity 211 of the slide plate 21 away from the air cylinder 32. At the same time, the mating depth of the elastic rod 33 and the internal thread of the piston rod 321 of the air cylinder 32 can be adjusted, so that the length of the elastic rod portion between the piston rod and the slide plate can be adjusted to ensure that when the second presser foot 23 is in the working position, the elastic rod 33 can have a slight elastic compression, and the slight elastic compression of the elastic rod 33 can form a stretching force to ensure that the slide plate 21 reliably abuts against the second limiting member 42. In this embodiment, since the elastic rod 33 is elastically compressed and the compression amount is within the elastic deformation range, no elastic yield problem will occur.

[0067] In this application, since the elastic rod 33 is a slender flexible structure, it will not generate a large offset force on the air cylinder piston. Also, because the length of the elastic rod 33 is relatively short, it can generate an appropriate extension stiffness to ensure that the slide plate 21 is subjected to a certain force and abuts against the first limiting member 41. At the same time, when the slide plate 21 moves in the arc-shaped space, it will be subject to frictional resistance. And if dust enters the arc-shaped space, it will also cause a relatively large sliding resistance. In this embodiment, by enabling the elastic rod 33 to have a slight elastic compression, it can ensure that the above-mentioned resistance is overcome.

[0068] As described above, it is only the preferred specific implementation manner of the present application. However, the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A presser foot device, characterized in that, Comprising: A chip suction hood body, the chip suction hood body being provided with a through hole; A presser foot assembly, the presser foot assembly including a slide plate, a first presser foot and a second presser foot, the slide plate being movably connected to the chip suction hood body, and the first presser foot and the second presser foot being respectively arranged on the slide plate; A driving assembly, the driving assembly including a driving member and an elastic rod, the driving member being connected to the chip suction hood body, one end of the elastic rod being connected to the driving member, and the other end of the elastic rod being connected to the slide plate; The driving assembly is configured to drive the slide plate to move relative to the chip suction hood body between a first position and a second position, so that the first presser foot is aligned with the through hole or the second presser foot is aligned with the through hole.

2. The presser foot device according to claim 1, wherein The elastic rod includes a first end portion, a second end portion and a connecting portion, the two ends of the connecting portion being respectively connected to the first end portion and the second end portion, the first end portion being movably connected to the slide plate, and the second end portion being connected to the driving member.

3. The presser foot device according to claim 2, characterized in that The cross-sectional areas of the first end portion and the second end portion are larger than the cross-sectional area of the connecting portion.

4. The presser foot device according to claim 2, characterized in that, The driving member is provided as a cylinder, the cylinder including a piston rod, and the second end portion being connected to the piston rod.

5. The presser foot device according to claim 1, characterized in that, The length of the elastic rod is greater than or equal to the movement stroke of the slide plate relative to the chip suction hood body.

6. The presser foot device according to claim 5, characterized in that, And the length of the elastic rod is less than or equal to the length of the slide plate.

7. The presser foot device according to any one of claims 1 to 6, characterized in that, The presser foot device further includes a limiting assembly, the limiting assembly including a first limiting member and a second limiting member, the first limiting member being connected to the chip suction hood body and located at one end of the slide plate, the second limiting member being connected to the chip suction hood body and located at the other end of the slide plate, and the first limiting member and the second limiting member being respectively configured to limit the slide plate.

8. The presser foot device according to claim 7, characterized in that, The first limiting member is further provided with a groove, and the elastic rod is mounted in the groove.

9. The presser foot device according to claim 7, characterized in that, Both the first limiting member and the second limiting member can be adjusted in height along the height direction of the chip suction hood body, and inclined surfaces are provided on the sides of the first limiting member and the second limiting member facing the slide plate, and at least part of the inclined surfaces are arranged opposite to the presser foot assembly.

10. The presser foot device according to claim 9, characterized in that, The first limiting member and the second limiting member are respectively provided with kidney-shaped holes, and the presser foot device further includes a limiting portion passing through the kidney-shaped holes and connected to the chip suction hood body, and the diameter of the limiting portion along the height direction of the chip suction hood body is smaller than the diameter of the kidney-shaped holes along the height direction of the chip suction hood body.

11. The presser foot device according to claim 10, characterized in that, The first limiting member is provided with two of the kidney-shaped holes, and the two kidney-shaped holes are arranged at intervals along the width direction of the first limiting member.

12. The presser foot device according to claim 10, characterized in that, The second limiting member is provided with two of the kidney-shaped holes, and the two kidney-shaped holes are arranged at intervals along the height direction of the second limiting member.

13. A circuit board processing device, characterized in that, Comprising an equipment body, a main shaft, a cutter, a workbench and the presser foot device according to any one of claims 1 to 12, the main shaft and the presser foot device being respectively connected to the equipment body and located above the workbench, and the cutter being connected to the main shaft and capable of passing through the presser foot device.

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