Cutter hole linkage switching type punching pliers

Abstract

The utility model discloses a tool hole linkage switching type punching clamp which comprises a clamp body, a handle, a tool changing disc, a hole changing disc and a linkage piece, the tool changing disc is vertically and rotatably installed on the clamp body, and a plurality of tool bits are arranged on the periphery of the tool changing disc. The hole changing disc is horizontally and rotationally installed on the clamp body and located below the cutter changing disc, a plurality of cutter holes are formed in the surface of the hole changing disc, and when the cutter heads are located above the corresponding cutter holes, the corresponding cutter heads and the cutter holes are located at punching gears; the linkage piece is in transmission connection between the cutter changing disc and the hole changing disc, when the cutter changing disc rotates to switch the cutter heads, the linkage piece drives the hole changing disc to rotate to switch the cutter holes, and the corresponding cutter heads and the corresponding cutter holes can be synchronously switched to the punching gear. On the basis that normal punching of the punching pliers is not interfered, the function of synchronously switching the tool bits and the tool holes is added, synchronous switching of the tool bits and the tool holes of the same specification can be achieved only through operation of one rotary knob, operation is easy and convenient, and applicability is high.

Description

Technical Field

[0001] The utility model relates to a punching pliers, in particular to a punching pliers with a knife-hole linkage switching type. Background Art

[0002] In the field of punching pliers / punchers, for the type of tool with a replaceable hole for solid punching, it has a wide range of uses and is more labor-saving for punching. However, it has a huge drawback. When the user wants to switch the cutter head specification to complete the corresponding matching action, it is too complicated. Its user group mostly includes non-professional family people, female groups, etc., and its use difficulty causes trouble to the user group.

[0003] At present, for a conventional penetrative punching pliers, its hole-changing action is as follows: First, the cutter head needs to be rotated to adjust the position of the cutter head, and then the hole plate needs to be rotated to adjust the position of the knife hole. And it is necessary to finely adjust the position of the cutter head and the corresponding knife hole to ensure the accuracy of their positions. Such a hole-changing action needs to be completed through a series of complex actions, the operation is very cumbersome, and it is easy to have inaccurate or non-corresponding hole-changing positions. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a punching pliers with a knife-hole linkage switching type that realizes knife replacement and hole replacement synchronously and has a simple operation.

[0005] To solve the above technical problem, the technical solution of the utility model is: A punching pliers with a knife-hole linkage switching type, including a pliers body and a handle, further including:

[0006] A knife-changing disk, vertically and rotatably installed on the pliers body, and a plurality of cutter heads are arranged on the outer periphery of the knife-changing disk;

[0007] A hole-changing disk, horizontally and rotatably installed on the pliers body and located below the knife-changing disk. A plurality of knife holes are arranged on the surface of the hole-changing disk, and the knife holes correspond to the cutter heads one by one. When the cutter head is located above the corresponding knife hole, the corresponding cutter head and the knife hole are in the punching gear;

[0008] A linkage member, drivingly connected between the knife-changing disk and the hole-changing disk. When the knife-changing disk rotates to switch the cutter head, the hole-changing disk is driven to rotate to switch the knife hole through the linkage member, so that the corresponding cutter head and the knife hole can be synchronously switched to the punching gear.

[0009] As a preferred technical solution, a knife-disk positioning member is correspondingly provided on the knife-changing disk, and / or a hole-disk positioning member is correspondingly provided on the hole-changing disk.

[0010] As a preferred technical solution, the cutter head positioning member includes a plurality of cutter head positioning planes provided on the outer peripheral surface of the cutter head replacement disc. The cutter head positioning planes correspond to the cutter heads one by one. A vertically arranged positioning elastic piece is provided on the clamp body. The positioning elastic piece can press against each cutter head positioning plane to limit the rotation of the cutter head replacement disc, and the cutter head positioning plane can also slide vertically along the positioning elastic piece.

[0011] As a preferred technical solution, the hole disc positioning member includes a plurality of hole disc positioning holes provided on the bottom end surface of the hole disc replacement disc. The hole disc positioning holes correspond to the cutter holes one by one. An elastic positioning column is provided at the bottom end of the clamp body, and the top end of the elastic positioning column can abut against each hole disc positioning hole to limit the rotation of the hole disc replacement disc.

[0012] As a preferred technical solution, the linkage member includes a first reversing shaft parallel to the axis of the cutter head replacement disc and a second reversing shaft parallel to the axis of the hole disc replacement disc. A driving wheel is coaxially fixed on the cutter head replacement disc, and a driven wheel is coaxially fixed on the hole disc replacement disc. A first transmission assembly is provided between the driving wheel and the first reversing shaft, a transmission reversing assembly is provided between the first reversing shaft and the second reversing shaft, and a second transmission assembly is provided between the second reversing shaft and the driven wheel.

[0013] As a preferred technical solution, the first transmission assembly includes a side gear provided above the side of the driving wheel. One side of the side gear is meshed and connected with the driving wheel, and a first gear is provided on the first reversing shaft. The other side of the side gear is in gear transmission with the first gear;

[0014] Or the first transmission assembly includes a first belt pulley provided on the first reversing shaft, and the first belt pulley is connected with the driving wheel through a first transmission belt;

[0015] Or the first transmission assembly includes a first sprocket provided on the first reversing shaft, and the first sprocket is connected with the driving wheel through a first toothed chain.

[0016] As a preferred technical solution, the second transmission assembly includes a second gear provided on the second reversing shaft, and the second gear is in gear transmission with the driven wheel;

[0017] Or the second transmission assembly includes a second belt pulley provided on the second reversing shaft, and the second belt pulley is connected with the driven wheel through a second transmission belt;

[0018] Or the second transmission assembly includes a second sprocket provided on the second reversing shaft, and the second sprocket is connected with the driven wheel through a second toothed chain.

[0019] As a preferred technical solution, the transmission reversing assembly is a bevel gear pair or a crown gear pair provided between the first reversing shaft and the second reversing shaft.

[0020] As a preferred technical solution, a tool changing shaft is concentrically fixed at the center of the tool changing disc. The tool changing shaft can rotate around the pliers body and slide downward along the pliers body. One end of the tool changing shaft extends out of the pliers body and is fixed with an operation knob.

[0021] As a preferred technical solution, the pliers body includes two side frames arranged left and right. Vertical downward guide grooves are respectively provided on the two side frames. Both ends of the tool changing shaft slide and rotate along the vertical downward guide grooves respectively. One end of the tool changing shaft extends out of the side frame for installing the operation knob; the front end of the handle is hinged to the front part of the pliers body. A downward pressing guide groove is provided in the middle of the handle. The end of the tool changing shaft also slides along the downward pressing guide groove. A reset member for driving the handle to swing upward is provided between the front end of the handle and the pliers body.

[0022] Due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows: On the basis of not interfering with the normal punching of the punching pliers, the present utility model adds the function of synchronously switching the tool head and the tool hole. The synchronous switching of the tool and the hole of the same specification can be realized only by operating a single knob. The operation is simple and direct, perfectly solving the industry pain point problem of the high operation difficulty of the solid punching pliers. Its structure is concise, the shape is beautiful, the operation feel is good, the application scenario is wide, and the applicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings are only intended to illustrate and explain the present utility model schematically, and do not limit the scope of the present utility model.

[0024] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0025] Figure 2 is Figure 1 a schematic structural diagram from another angle;

[0026] Figure 3 is a schematic internal structural diagram of an embodiment of the present utility model;

[0027] Figure 4 is Figure 3 a schematic structural diagram from another angle;

[0028] Figure 5 is a schematic diagram of a tool disc positioning member of an embodiment of the present utility model;

[0029] Figure 6 is a schematic diagram of a hole disc positioning member of an embodiment of the present utility model;

[0030] Figure 7 is a schematic structural diagram of another embodiment of the present utility model;

[0031] In the figure: 100 - tong body; 101 - side frame; 102 - base; 103 - vertical lower guide groove; 200 - handle; 201 - lower pressure guide groove; 202 - return spring; 300 - tool change disc; 301 - tool bit; 302 - tool change shaft; 400 - hole change disc; 401 - tool hole; 500 - operation knob; 600 - linkage; 601 - driving wheel; 602 - driven wheel; 603 - side gear; 604 - gear one; 605 - gear two; 700 - tool disc positioning part; 701 - tool disc positioning plane; 702 - positioning spring piece; 800 - hole disc positioning part; 801 - hole disc positioning groove; 802 - elastic positioning post. Detailed implementation mode

[0032] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present utility model are described by way of illustration. Undoubtedly, those of ordinary skill in the art can recognize that various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present utility model. Therefore, the accompanying drawings and the description are illustrative in nature and are not used to limit the protection scope of the claims.

[0033] Embodiment 1:

[0034] As Figure 1 and Figure 2As shown in the figure, the knife-hole linkage switching punching pliers include a pliers body 100, a handle 200, a tool-changing disc 300 and a hole-changing disc 400. The pliers body 100 includes left and right side frames 101 located at the upper part and a base 102 located at the lower part. The tool-changing disc 300 is vertically rotatably installed between the two side frames 101, and the hole-changing disc 400 is horizontally rotatably installed on the base 102. The tool-changing disc 300 is located above the hole-changing disc 400. A plurality of tool heads 301 are arranged on the outer periphery of the tool-changing disc 300, and a plurality of knife holes 401 are arranged on the surface of the hole-changing disc 400. The knife holes 401 correspond to the tool heads 301 one by one. When the tool head 301 is located above the corresponding knife hole 401, the corresponding tool head 301 and the knife hole 401 are in the punching gear; vertically arranged vertical lower guide grooves 103 are respectively provided on the two side frames 101. A tool-changing shaft 302 is concentrically fixed at the center of the tool-changing disc 300. The two ends of the tool-changing shaft 302 respectively pass through the vertical lower guide grooves 103. The tool-changing shaft 302 can rotate in the vertical lower guide grooves 103 and can also slide downward along the vertical lower guide grooves 103. One end of the tool-changing shaft 302 extends outside the side frame 101 and is fixedly installed with an operation knob 500; in this embodiment, the handle 200 includes a fixed handle located at the lower part, which is directly fixed on the side frame, and the movable handle located at the upper part is a component for controlling punching. The front end of the movable handle is hinged to the front part of the pliers body 100. A downward pressure guide groove 201 is provided in the middle of the front end of the movable handle. The end of the tool-changing shaft 302 also slides along the downward pressure guide groove 201. A return spring 202 for driving the head end of the movable handle to swing upward is provided between the front end of the movable handle and the pliers body 100.

[0035] The above structure is similar to the structure of the punching pliers in the prior art. Its working principle is as follows: When it is necessary to change the punching model, the tool-changing disc 300 and the hole-changing disc 400 are respectively rotated so that the tool head 301 and the corresponding knife hole 401 are adjusted to the punching gear. At this time, the tool head 301 is located above the corresponding knife hole 401; when punching, the tail of the handle 200 is pressed down, and the downward pressure guide groove 201 presses the tool-changing shaft 302 downward, so that the tool-changing shaft 302 slides downward along the vertical lower guide groove 103, driving the corresponding tool-changing disc 300 and the tool head 301 thereon to move downward as a whole, so that the tool head 301 moves downward into the corresponding knife hole 401 to complete the punching action; when the tail of the handle 200 is released, the return spring 202 drives the handle 200 to swing upward and reset, and the downward pressure guide groove 201 pushes the tool-changing shaft 302 upward along the vertical lower guide groove 103 to reset.

[0036] In the above structure, when the punching model needs to be changed, the tool changing disc 300 and the hole changing disc 400 need to be adjusted separately, and the operation arrangement is cumbersome. To solve this problem, the present application improves the above structure and provides a linkage part 600 that can realize the synchronous rotation adjustment of the tool changing disc 300 and the hole changing disc 400.

[0037] See also Figure 3 and Figure 4 The linkage member 600 is transmission-connected between the tool changing disc 300 and the hole changing disc 400. When the tool changing disc 300 rotates to switch the tool head 301, the hole changing disc 400 is driven by the linkage member 600 to rotate and switch the tool hole 401, so that the corresponding tool head 301 and the tool hole 401 can be synchronously switched to the punching gear. When adjusting, the operating knob 500 is turned to control the tool changing disc 300 to rotate a certain angle. At the same time, the linkage member 600 will drive the hole changing disc 400 to follow and rotate synchronously at the same angle. At this time, the tool head 301 and the tool hole 401 of the same specification are synchronously switched to the punching gear.

[0038] See also Figures 2 to 4 The linkage 600 includes a reversing shaft 1 parallel to the axis of the tool changing disc 300 and a reversing shaft 2 parallel to the axis of the hole changing disc 400. The reversing shaft 1 is rotatably mounted on the side frame 101, and the reversing shaft 2 is rotatably mounted on the base 102. A driving wheel 601 is coaxially fixed on the tool changing disc 300, and a driven wheel 602 is coaxially fixed on the hole changing disc 400. A transmission component 1 is provided between the driving wheel 601 and the reversing shaft 1, a transmission reversing component is provided between the reversing shaft 1 and the reversing shaft 2, and a transmission component 2 is provided between the reversing shaft 2 and the driven wheel 602.

[0039] In this embodiment, a gear transmission method is adopted. Both the driving wheel 601 and the driven wheel 602 are gears, and can be fixedly installed by threads or other means. The specific transmission method is as follows: The first transmission assembly includes a side gear 603 disposed above the side of the driving wheel 601. The side gear 603 is fixedly installed on a connecting shaft, and the connecting shaft is rotatably installed on the side frame 101. One side of the side gear 603 is meshed and connected with the driving wheel 601. A gear 604 is fixedly installed on the first reversing shaft. The other side of the side gear 603 and the gear 604 can be directly meshed and transmitted, or transmitted through an intermediate gear; The second transmission assembly includes a gear 605 fixedly installed on the second reversing shaft. The gear 605 and the driven wheel 602 can be directly meshed and transmitted, or transmitted through an intermediate gear; The transmission reversing assembly includes a bevel gear 1 fixed to the first reversing shaft and a bevel gear 2 fixed to the second reversing shaft. The bevel gear 1 and the bevel gear 2 are meshed and transmitted to perform 90° power transmission as a bevel gear pair. The bevel gear 1 and the bevel gear 2 are not shown in the drawings. Of course, the bevel gear can also be replaced with a crown gear to achieve 90° power transmission.

[0040] The transmission path is: operating knob 500 → tool change shaft 302 → tool change disk 300 → driving wheel 601 → side gear 603 → gear 1 → first reversing shaft → bevel gear 1 → bevel gear 2 → second reversing shaft → gear 2 → driven wheel 602. In this embodiment, since the driving wheel 601 needs to move downward with the tool change disk 300 for drilling, it will be disengaged from the side gear 603. Therefore, the side gear 603 is disposed above the side of the driving wheel 601, so that the meshing part between the two is at the upper side edge, and will not interfere with the up and down movement of the driving wheel 601. When automatically returning to the original position after drilling is completed, when the driving wheel 601 moves upward, it will automatically resume meshing with the side gear 603 and can be synchronously switched.

[0041] When designing the gears, by selecting the module and number of teeth of the gears, it is ensured that when the tool change disk 300 drives the driving wheel 601 to rotate a certain angle, the driven wheel 602 can drive the tool change disk 300 to rotate the same angle. Those skilled in the art select suitable module and number of teeth according to various factors such as product size, number of gears, and spatial layout, which will not be elaborated here.

[0042] In this embodiment, six tool heads 301 of different specifications are evenly distributed on the outer periphery of the tool changing disc 300, and six tool holes 401 of different specifications are evenly distributed on the upper surface of the hole changing disc 400. Therefore, there are six punching gears between the tool heads 301 and the tool holes 401. Of course, the number of the tool heads 301 and the tool holes 401 can be three, four or six, as long as they correspond one by one. In order to ensure that the tool heads 301 and the tool holes 401 can accurately be in the angular positions of the punching gears each time the specifications are switched, a tool disc positioning member 700 is correspondingly provided on the tool changing disc 300 and a hole disc positioning member 800 is correspondingly provided on the hole changing disc 400. If only the tool disc positioning member 700 is provided, after the position of the tool changing disc 300 is limited by the tool disc positioning member 700, the rotation of the tool changing disc 300 stops, so that the tool heads 301 are in the punching gears, and the rotation of the hole changing disc 400 stops through the linkage member 600, indirectly making the tool holes 401 in the punching gears, and the positioning purpose can also be achieved; if only the hole disc positioning member 800 is provided, after the position of the hole changing disc 400 is limited by the hole disc positioning member 800, the rotation of the hole changing disc 400 stops, so that the tool holes 401 are in the punching gears, and the rotation of the tool changing disc 300 stops through the linkage member 600, indirectly making the tool heads 301 in the punching gears, and the positioning purpose can also be achieved; if both the tool disc positioning member 700 and the hole disc positioning member 800 are provided, the tool heads 301 and the tool holes 401 can be respectively limited. At this time, the positioning is more accurate, and it can be accurately positioned to the angular positions of each punching gear, compensating for the deviation caused in the transmission process, such as the angular deviation caused by the gear meshing clearance. At the same time, it can also improve the feel of the user when switching each gear during operation.

[0043] See Figure 5, the cutter head positioning member 700 includes a plurality of cutter head positioning planes 701 provided on the outer peripheral surface of the tool changing disc 300. The cutter head positioning planes 701 correspond to the cutter heads 301 one by one. A vertically arranged positioning elastic piece 702 is provided on the side frame 101 of the clamp body 100. The top and bottom ends of the positioning elastic piece 702 are respectively fixed on the side frame 101. The middle part of the positioning elastic piece 702 can press against each cutter head positioning plane 701 to limit the rotation of the tool changing disc 300. The cutter head positioning plane 701 can also slide vertically along the positioning elastic piece 702. In this embodiment, the surface of the cutter head positioning plane 701 close to the tool changing disc 300 has a depth less than the outer peripheral surface of the tool changing disc 300. When the positioning elastic piece 702 presses against the cutter head positioning plane 701, a certain cutter head 301 is located directly below in the drilling position. At this time, when the operation knob 500 is not rotated, the positioning elastic piece 702 can tightly press against the cutter head positioning plane 701 to limit the tool changing disc 300, preventing the tool changing disc 300 from rotating, so that the cutter head 301 is accurately maintained in the drilling position. At this time, if the handle 200 is pressed for drilling, the handle 200 will push the tool changing shaft 302 downward. At this time, the cutter head positioning plane 701 can slide vertically downward along the surface of the positioning elastic piece 702. The positioning elastic piece 702 can ensure that the tool changing disc 300 does not rotate during the drilling process. After the drilling is completed, the cutter head positioning plane 701 slides upward along the positioning elastic piece 702 to reset; when it is necessary to switch the cutter head 301, rotate the operation knob 500, drive the tool changing disc 300 to rotate through the tool changing shaft 302. The outer peripheral surface of the tool changing disc 300 presses against the positioning elastic piece 702 and rotates against the elastic force of the positioning elastic piece 702. When it rotates to the next cutter head positioning plane 701, the positioning elastic piece 702 is released and pressed against this cutter head positioning plane 701. The cooperation between the surfaces can quickly and accurately achieve positioning, and there is a clicking sound when switching gears, improving the feel of the user when switching each gear during operation.

[0044] See Figure 3 and Figure 6The hole plate positioning member 800 includes a plurality of hole plate positioning grooves 801 provided on the bottom end surface of the hole changing plate 400, and the hole plate positioning grooves 801 correspond to the knife holes 401 one by one. An elastic positioning column 802 is provided at the bottom end of the base 102, and the top end of the elastic positioning column 802 can be abutted against each of the hole plate positioning grooves 801 to limit the rotation of the hole changing plate 400. The hole plate positioning groove 801 is a hemispherical groove, and the elastic positioning column 802 includes a fixed column fixed to the base 102, and a sliding column is sheathed on the top end of the fixed column. A spring is installed between the fixed column and the sliding column, and a hemispherical head is provided on the top end of the sliding column to engage with the hemispherical groove. When the hole-changing disk 400 is driven to rotate by the linkage 600, the spring is squeezed back, the sliding column descends, and the hemispherical head is squeezed out of the hole-changing disk positioning groove 801 to realize the rotation of the hole-changing disk 400. When it rotates to the next hole-changing disk positioning groove 801, the spring is released to make the sliding column rise, and the hemispherical head abuts and snaps into the hole-changing disk positioning groove 801 to position the hole-changing disk 400.

[0045] In this embodiment, the linkage member 600 is located on the inner side of the side plate of the punching pliers, the inner side or the bottom of the base 102, and is located in the non-interference area on both sides of the tool disc 300 with the tool disc positioning member 700, forming a built-in structure with a reasonable structural layout, which is simpler and more beautiful.

[0046] Embodiment 2:

[0047] The structure of this embodiment is basically the same as that of the first embodiment, and the difference mainly lies in the different transmission modes. In this embodiment, the transmission mode is a belt transmission mode, and the driving wheel 601 and the driven wheel 602 are both pulleys. Figure 7 The specific structure is as follows: the transmission component 1 includes a pulley 1 disposed on the reversing shaft 1, and the pulley 1 is connected to the driving wheel 601 through a transmission belt 1; the transmission component 2 includes a pulley 2 disposed on the reversing shaft 2, and the pulley 2 is connected to the driven wheel 602 through a transmission belt 2. The transmission path is: operating knob 500→tool changing shaft 302→tool changing disc 300→driving wheel 601→transmission belt 1→pulley 1→reversing shaft 1→bevel gear 1→bevel gear 2→reversing shaft 2→pulley 2→transmission belt 2→driven wheel 602. When punching, the driving wheel 601 is driven to slide downward, and the transmission belt is loosened and the transmission is cut off. Due to the arrangement of the cutter disc positioning member 700 and the hole disc positioning member 800, except for the driving wheel 601 sliding downward, the positions of other gears and pulleys remain stationary, and the punching operation of the cutter head 301 is not affected. After the punching is completed, the driving wheel 601 is reset upward, and the transmission belt is stretched to achieve transmission coordination.

[0048] Embodiment three:

[0049] The structure of this embodiment is basically the same as that of the first embodiment, and the difference mainly lies in the different transmission methods. In this embodiment, the transmission method is a sprocket method, and the driving wheel 601 and the driven wheel 602 are both sprockets. The specific structure is as follows: the transmission component 1 includes a sprocket 1 arranged on the first reversing shaft, and the sprocket 1 is connected to the driving wheel 601 through a toothed chain 1; the transmission component 2 includes a sprocket 2 arranged on the second reversing shaft, and the sprocket 2 is connected to the driven wheel 602 through a toothed chain 2. The transmission path is: operating knob 500→tool change shaft 302→tool change disc 300→driving wheel 601→toothed chain 1→sprocket 1→reversing shaft 1→bevel gear 1→bevel gear 2→reversing shaft 2→sprocket 2→toothed chain 2→driven wheel 602. When punching, the driving wheel 601 slides downward passively, the toothed chain is relaxed, and the transmission is cut off. Due to the arrangement of the cutter disc positioning member 700 and the hole disc positioning member 800, the driving wheel 601 does not rotate. Even if the toothed chain is relaxed, the toothed chain matching portion between the driving wheel 601 and the toothed chain is not dislocated, and the positions of other gears and sprockets remain unchanged, which does not affect the punching of the cutter head 301. After the punching is completed, the driving wheel 601 is reset upward. Since the toothed chain matching portion is not dislocated, the toothed chain can be stretched open to achieve transmission matching.

[0050] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A knife-hole linkage switchable punching pliers, comprising a pliers body and a handle, characterized in that: Also includes: A tool changer disc is vertically rotatably mounted on the clamp body, and a plurality of tool heads are arranged on the outer periphery of the tool changer disc; A hole-changing disc is horizontally rotatably mounted on the clamp body and is located below the tool-changing disc. A plurality of tool holes are arranged on the surface of the hole-changing disc. The tool holes correspond to the tool heads one by one. When the tool heads are located above the corresponding tool holes, the corresponding tool heads and tool holes are in a punching position. A linkage member is transmission-connected between the tool-changing disc and the hole-changing disc. When the tool-changing disc rotates to switch the tool head, the hole-changing disc is driven by the linkage member to rotate and switch the tool hole, so that the corresponding tool head and the tool hole can be synchronously switched to the punching gear.

2. The knife-hole linkage switchable punching pliers according to claim 1, characterized in that: The tool changing disc is provided with a tool disc positioning piece correspondingly, and / or the hole changing disc is provided with a hole disc positioning piece correspondingly.

3. The knife-hole linkage switchable punching pliers according to claim 2, characterized in that: The cutter disc positioning member includes a plurality of cutter disc positioning planes arranged on the outer peripheral surface of the cutter disc, the cutter disc positioning planes correspond to the cutter heads one by one, and the caliper body is provided with a vertically arranged positioning spring sheet, the positioning spring sheet can press each of the cutter disc positioning planes to limit the rotation of the cutter disc, and the cutter disc positioning plane can also slide vertically along the positioning spring sheet.

4. The knife-hole linkage switchable punching pliers according to claim 2, characterized in that: The hole plate positioning member includes a plurality of hole plate positioning holes arranged on the bottom end surface of the hole changing plate, the hole plate positioning holes correspond one to one with the knife holes, and an elastic positioning column is provided at the bottom end of the pliers body, and the top end of the elastic positioning column can abut against each of the hole plate positioning holes to limit the rotation of the hole changing plate.

5. The knife-hole linkage switchable punching pliers according to claim 1, characterized in that: The linkage part includes a reversing shaft 1 parallel to the axis of the tool changing disc and a reversing shaft 2 parallel to the axis of the hole changing disc. A driving wheel is coaxially fixed on the tool changing disc, and a driven wheel is coaxially fixed on the hole changing disc. A transmission component 1 is provided between the driving wheel and the reversing shaft 1, a transmission reversing component is provided between the reversing shaft 1 and the reversing shaft 2, and a transmission component 2 is provided between the reversing shaft 2 and the driven wheel.

6. The knife-hole linkage switchable punching pliers according to claim 5, characterized in that: The transmission assembly 1 includes a side gear disposed above the driving wheel, one side of the side gear is meshed and connected with the driving wheel, a gear 1 is disposed on the reversing shaft 1, and the other side of the side gear is gear-transmitted with the gear 1; Or the transmission assembly 1 includes a pulley 1 arranged on the reversing shaft 1, and the pulley 1 is connected to the driving wheel through a transmission belt 1; Or the transmission assembly 1 includes a sprocket 1 arranged on the reversing shaft 1, and the sprocket 1 is connected to the driving wheel through a toothed chain 1.

7. The knife-hole linkage switchable punching pliers according to claim 5, characterized in that: The second transmission assembly comprises a second gear disposed on the second reversing shaft, and a gear transmission is performed between the second gear and the driven wheel; Or the second transmission assembly includes a second pulley disposed on the second reversing shaft, and the second pulley is connected to the driven wheel via a second transmission belt; Or the second transmission assembly includes a second sprocket wheel arranged on the second reversing shaft, and the second sprocket wheel is connected to the driven wheel through a second tooth chain.

8. The knife-hole linkage switchable punching pliers according to claim 5, characterized in that: The transmission reversing assembly is a bevel gear pair or a crown gear pair arranged between the reversing shaft one and the reversing shaft two.

9. The knife-hole linkage switchable punching pliers according to claim 1, characterized in that: A tool changing shaft is concentrically fixed at the center of the tool changing disc. The tool changing shaft can rotate around the caliper body and slide downward along the caliper body. One end of the tool changing shaft extends out of the caliper body and is fixed with an operating knob.

10. The knife-hole linkage switchable punching pliers according to claim 9, characterized in that: The pliers body includes two side frames arranged on the left and right, and the two side frames are respectively provided with vertical lower guide grooves. The two ends of the tool changing shaft slide and rotate along the vertical lower guide grooves respectively, and one end of the tool changing shaft extends out of the side frame for installing the operating knob; the front end of the handle is hinged to the front part of the pliers body, and the middle part of the handle is provided with a downward pressure guide groove. The end of the tool changing shaft also slides along the downward pressure guide groove, and a reset member for driving the handle to swing upward is provided between the front end of the handle and the pliers body.

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