A precision positioning punching pliers

Abstract

The present invention provides an accurately positioned punching pliers, which includes two fixed pieces with the same specifications; an upper handle is fixedly connected to the fixed piece, and a lower handle is movably connected; a punching component is movably connected between the two fixed pieces through a cross pin; a positioning device is fixedly connected below the two fixed pieces; the positioning device includes a U-shaped block, a positioning hole is provided in the upper half of the U-shaped block, and a first through hole is provided in the lower half; a rotating lower die is provided in the U-shaped block; a number of second through holes are provided in the rotating lower die; an adjusting knob is provided on one of the fixed pieces. The accurately positioned punching pliers of the present invention has a simple structure, is convenient and labor-saving to use, can quickly change the needle, and is also designed with a positioning device, so that the punching needle can punch downward on the lower die at a vertical angle. The design of the second through holes in the rotating lower die and the first through hole in the lower half of the U-shaped block enables the waste material cut by punching to be directly discharged, thereby reducing the occurrence of defective phenomena such as incomplete punching and extrusion deformation around the hole.

Description

Technical Field

[0001] The present invention relates to the technical field of hand tools, and particularly relates to an accurately positioned punching pliers. Background Art

[0002] Punching pliers are common hand tools in life and are often used for punching holes in daily necessities such as leather goods.

[0003] The existing adjustable punching pliers (punches with 6 apertures) on the market work in such a way that under the action of the handle, the punch presses hard on the copper block below at a certain angle (non-vertical angle) to achieve the punching and shearing effect. Punching in this form is not only laborious, but also has problems such as incomplete punching and shearing (that is, there is still partial adhesion between the material to be punched and the edge of the hole, and it does not completely fall off) and deformation of the periphery of the hole (that is, due to the non-vertical punching angle, it is extruded to the periphery of the hole). These not only affect the quality of the item to be punched, but also affect the user experience. Especially when punching holes in high-grade belts and watchbands, it is likely to cause great losses to the user.

[0004] To solve the above problems, an accurately positioned punching pliers needs to be invented. Summary of the Invention

[0005] To solve the above problems, the present invention provides an accurately positioned punching pliers.

[0006] The technical solution of the present invention is: an accurately positioned punching pliers, including two fixed pieces with the same specifications; an upper handle is fixedly connected to the fixed piece, and a lower handle is movably connected; a punching assembly is movably connected between the two fixed pieces through a cross pin; a positioning device is fixedly connected below the two fixed pieces; the positioning device includes a U-shaped block, the upper half of the U-shaped block is provided with a positioning hole, and the lower half is provided with a first through hole; a rotating lower die is movably connected to the upper surface of the lower half of the U-shaped block; several second through holes are provided in the rotating lower die; an adjusting knob is provided on one of the fixed pieces.

[0007] Further, a first slot hole is provided in the fixed piece, and a second slot hole is provided in the front part of the lower handle; the cross pin passes through the first slot hole, the second slot hole and the punching assembly; a first small hole is provided in the fixed piece, and a second small hole is provided in the middle part of the lower handle; a first connecting piece is provided in the first small hole and the second small hole.

[0008] Further, one side of the U-shaped block is connected to the fixed piece through a second connecting piece, a third connecting piece and a fourth connecting piece.

[0009] Further, a set screw is provided in the lower half of the U-shaped block; the rotating lower die is movably connected above the lower half of the U-shaped block through a seventh connecting piece.

[0010] Furthermore, the punching component includes two chucks with the same specifications and several punching pins; there are several grooves on the chucks, and the punching pins are arranged in the grooves.

[0011] Furthermore, the diameter of the head of the punching pin matches the second through hole; the diameter of the tail end of the punching pin matches the positioning hole.

[0012] Furthermore, a cutting surface is provided in the adjusting knob.

[0013] A precision positioning punching pliers of the present invention has a simple structure and is convenient to use. The design of the punching component enables users to quickly and flexibly change the pins according to requirements; the design of the positioning device enables the punching pin to punch downward into the lower die at a vertical angle, thereby reducing the occurrence of adverse phenomena such as the extrusion deformation around the hole; the design of the second through hole in the rotating lower die and the first through hole in the lower half of the U-shaped block enables the waste material cut by punching to be directly discharged, thereby avoiding the incomplete punching situation where there is still partial adhesion between the material to be punched and the edge of the hole, and making the punching more labor-saving. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] Figure 2 is a schematic detail diagram of the present invention;

[0016] Figure 3 is a schematic structural diagram of the lower handle;

[0017] Figure 4 is an exploded structural diagram of the positioning device;

[0018] Figure 5 is an exploded structural diagram of the punching component;

[0019] Figure 6 is a schematic structural diagram of the fixing piece;

[0020] Figure 7 is a schematic structural diagram of the adjusting device.

[0021] In the figure, fixing piece - 1, upper handle - 2, lower handle - 3, cross pin - 4, punching component - 5, positioning device - 6, adjusting knob - 7; first slot hole - 1.1, first small hole - 1.2, first connecting piece - 1.3, second connecting piece - 1.4, third connecting piece - 1.5, fourth connecting piece - 1.6; second slot hole - 3.1, second small hole - 3.2; chuck - 5.1, punching pin - 5.2, groove - 5.3; U-shaped block - 6.1, positioning hole - 6.2, first through hole - 6.3, rotating lower die - 6.4, second through hole - 6.5, set screw - 6.6; seventh connecting piece 6.7; cutting surface - 7.1. Detailed implementation mode

[0022] The following will describe a precision positioning punching pliers of the present invention in detail with reference to the accompanying drawings.

[0023] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown in , , , , , , , , a precision positioning punching pliers includes two fixed pieces 1 with the same specifications; an upper handle 2 is fixedly connected to the fixed piece 1, and a lower handle 3 is movably connected; a punching component 5 is movably connected between the two fixed pieces 1 through a cross pin 4; a positioning device 6 is fixedly connected below the two fixed pieces 1; the positioning device 6 includes a U-shaped block 6.1, a positioning hole 6.2 is provided in the upper half of the U-shaped block 6.1, and a first through hole 6.3 is provided in the lower half; a rotating lower die 6.4 is movably connected to the upper surface of the lower half of the U-shaped block 6.1; a plurality of second through holes 6.5 are provided in the rotating lower die 6.4; an adjusting knob 7 is provided on one of the fixed pieces 1; a first slot 1.1 is provided in the fixed piece 1, and a second slot 3.1 is provided at the front of the lower handle 3; the cross pin 4 passes through the first slot 1.1, the second slot 3.1 and the punching component 5; a first small hole 1.2 is provided in the fixed piece 1, and a second small hole 3.2 is provided in the middle of the lower handle 3; a first connecting piece 1.3 is provided in the first small hole 1.2 and the second small hole 3.2; one side of the U-shaped block 6.1 is connected to the fixed piece 1 through a second connecting piece 1.4, a third connecting piece 1.5 and a fourth connecting piece 1.6; a set screw 6.6 is provided in the lower half of the U-shaped block 6.1; the rotating lower die 6.4 is movably connected above the lower half of the U-shaped block 6.1 through a seventh connecting piece 6.7; the punching component 5 includes two chucks 5.1 with the same specifications and a plurality of punch pins 5.2; a plurality of grooves 5.3 are provided on the chuck 5.1, and the punch pins 5.2 are arranged in the grooves 5.3; the diameter of the head of the punch pin 5.2 matches the second through hole 6.5; the diameter of the tail end of the punch pin 5.2 matches the positioning hole 6.2; a cut surface 7.1 is provided in the adjusting knob 7.

[0024] In actual use, the user first rotates the adjustment knob 7 so that the section plane 7.1 of the adjustment knob 7 coincides with the side surface of the front end of the lower handle 3. At this time, the punching pliers are in the needle-changing state; then, according to actual needs, the user selects a punching needle 5.2 with an appropriate diameter and rotates the chuck 5.1 to make the punching needle 5.2 face the rotating lower die 6.4; next, the lower handle 3 drives the entire punching assembly 5 to move downward. The head of the punching needle 5.2 first enters the positioning hole 6.2 for preliminary positioning at this time, and then continues to move downward. The tail of the punching needle 5.2 then moves downward into the positioning hole 6.2 to achieve precise positioning. Then, the user rotates the rotating lower die 6.4 to select a second through hole 6.5 with the same diameter as the head of the punching needle 5.2, and smoothly inserts the head of the punching needle 5.2 completely into the second through hole 6.5, and fixes the rotating lower die 6.4 with a set screw 6.6; the user rotates the adjustment knob 7 so that the outer circle of the adjustment knob 7 is tangent to the side surface of the front end of the lower handle 3. At this time, the adjustment is completed, and the punching pliers are in the state of waiting for punching; then, the item to be punched can be placed in the U-shaped block 6.1 for punching.

[0025] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A precisely positioned punching pliers, characterized in that: It includes two fixing pieces (1) with the same specifications; on the said fixing piece (1), an upper handle (2) is fixedly connected, and a lower handle (3) is movably connected; between the two fixing pieces (1), a punching component (5) is movably connected through a cross pin (4); below the two fixing pieces (1), a positioning device (6) is fixedly connected; the said positioning device (6) includes a U-shaped block (6.1), the upper half of the U-shaped block (6.1) is provided with a positioning hole (6.2), and the lower half is provided with a first through hole (6.3); on the upper surface of the lower half of the U-shaped block (6.1), a rotary lower die (6.4) is movably connected; in the said rotary lower die (6.4), a number of second through holes (6.5) are provided; on one of the fixing pieces (1), an adjusting knob (7) is provided; in the fixing piece (1), a first slot hole (1.1) is provided, and in the front part of the lower handle (3), a second slot hole (3.1) is provided; the cross pin (4) passes through the first slot hole (1.1), the second slot hole (3.1) and the punching component (5); in the fixing piece (1), a first small hole (1.2) is provided, and in the middle part of the lower handle (3), a second small hole (3.2) is provided; in the first small hole (1.2) and the second small hole (3.2), a first connecting piece (1.3) is provided.

2. The precision positioning punching pliers according to claim 1, characterized in that: One side of the said U-shaped block (6.1) is connected to the said fixing piece (1) through a second connecting piece (1.4), a third connecting piece (1.5) and a fourth connecting piece (1.6).

3. The precision positioning punching pliers according to claim 1, characterized in that: In the lower half of the said U-shaped block (6.1), a set screw (6.6) is provided; the said rotary lower die (6.4) is movably connected above the lower half of the U-shaped block (6.1) through a seventh connecting piece (6.7).

4. The precise positioning punching pliers according to claim 1, characterized in that: The said punching component (5) includes two chucks (5.1) with the same specifications and a number of punch pins (5.2); on the said chuck (5.1), a number of grooves (5.3) are provided, and the punch pins (5.2) are arranged in the said grooves (5.3).

5. The precision positioning punching pliers according to claim 4, characterized in that: The diameter of the head of the said punch pin (5.2) matches the second through hole (6.5); the diameter of the tail end of the said punch pin (5.2) matches the positioning hole (6.2).

6. The precision positioning punching pliers according to claim 1, characterized in that: In the said adjusting knob (7), a cut surface (7.1) is provided.

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