Punching pliers

Abstract

The invention discloses a pair of punching pliers to solve the technical problems that existing punching pliers are inconvenient to manufacture and small in magnification times. The clamp comprises a clamp body, a handle, a punching needle and a power component, a clamp mouth is arranged on one side of the clamp body, the punching needle is arranged in the clamp mouth, the power component comprises a rotating rod, a swing rod and a push rod, the top end of the rotating rod is rotationally connected to the upper portion of the side, away from the punching needle, of the clamp body, and the lower end of the swing rod is rotationally connected to the lower portion of the side, located on the punching needle, of the clamp body. The swing rod is obliquely arranged upwards and abuts against the inner side of the upper portion of the rotating rod, the push rod is located on the lateral upper portion of the swing rod and rotationally connected to the middle of the clamp body, the lower end of the push rod abuts against the swing rod, and the upper end of the push rod abuts against the punching needle. The distance between the connection point of the push rod and the clamp body and the contact point of the push rod and the swing rod is larger than the distance between the connection point of the push rod and the clamp body and the contact point of the push rod and the punching needle. The three-stage lever has the beneficial effects that the three-stage lever is designed, so that more labor is saved, and the whole is more convenient to manufacture and assemble.

Description

Technical Field

[0001] The invention relates to the technical field of hardware tools, in particular to a pair of punching pliers. Background Art

[0002] Punching pliers are used to punch holes in plates, and include a pliers body, a handle, a punching needle, and a power component. The punching needle is arranged in the pliers body, the handle and the pliers body are fixedly connected, and the power component and the pliers body are connected to push the punching needle up and down to punch holes. The Chinese patent document with publication number CN221892118U discloses a punching pliers, which uses a rotating rod to compress a pressure strip to make the pressure strip rotate upward. At this time, the resistance arm on the pressure strip can push the punching needle to move upward to punch holes. However, in practice, the applicant found that the above-mentioned punching pliers still have the following problems: (1) The pressure strip is a special-shaped structure, which is inconvenient to manufacture; (2) The amplification factor of the torque is small when the punching pliers are in the initial position, and gradually increases during the punching process. Summary of the invention

[0003] The invention provides a punching pliers to solve the technical problems of the existing punching pliers being inconvenient to manufacture and having a small magnification.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A punching pliers is designed, comprising a pliers body, a handle, a punch needle, and a power component. A pliers mouth is provided on one side of the pliers body, the punch needle is provided in the pliers mouth, the handle is located below the pliers body, the power component is connected to the pliers body to push the punch needle to move, and the power component comprises a rotating rod, a rocker rod and a push rod. The top end of the rotating rod is rotatably connected to the upper part of the pliers body away from the punch needle, the lower end of the rocker rod is rotatably connected to the lower part of the pliers body on the punch needle side, the rocker rod is inclined upward and abuts against the inner side of the upper part of the rotating rod, the push rod is located above the side of the rocker rod and is rotatably connected to the middle part of the pliers body, the lower end of the push rod abuts against the rocker rod, the upper end of the push rod abuts against the punch needle, and the distance between the connection point of the push rod and the pliers body to the contact point of the push rod and the rocker rod is greater than the distance between the connection point of the push rod and the pliers body to the contact point of the push rod and the punch needle.

[0005] Furthermore, the swing rod is a smooth arc-shaped structure, and the outer arc surface of the swing rod faces one side of the rotating rod, or the swing rod is an arc-shaped structure, and a groove is provided on the inner surface of the swing rod, and the end of the push rod is clamped in the groove.

[0006] Furthermore, the push rod is a folded structure, the bending portion of which is rotatably connected to the clamp body, the outer surface of the bending portion faces one side of the swing rod, and the bending angle of the push rod is between 70° and 140°.

[0007] Furthermore, rollers are provided at both ends of the push rod and at one end where the swing rod and the rotating rod abut against each other.

[0008] Furthermore, a clamping groove is provided at one end where the push rod and the punch needle abut, and the roller is provided in the clamping groove. The roller abuts against the punch needle, and the width of the punch needle matches the width of the clamping groove so that the punch needle can fall from the clamping groove after the roller is removed.

[0009] Furthermore, a slide groove is arranged on the inner side of the rotating rod, and the roller at the end of the swing rod is arranged in the slide groove, and the width of the slide groove matches the thickness of the roller at the end of the swing rod.

[0010] Furthermore, the pliers body includes a pliers mouth and a pliers groove, the pliers mouth is located at the top of the pliers body, the pliers groove includes a left groove plate and a right groove plate, the rotating rod, the rocker arm, and the push rod are all rotatably connected in the pliers groove, and a limiting column is arranged above the rotating rod in the pliers groove.

[0011] Furthermore, the punch needle includes a base and a needle body, and a return spring is arranged on the punch needle, one end of the return spring abuts against the punch needle base, and the other end abuts against the bottom of the pliers mouth.

[0012] Furthermore, an inverted U-shaped connecting piece is connected to the bottom of the punch needle, and the inverted U-shaped connecting piece is rotatably connected to the end of the push rod. A first slot is provided on the rocker arm, and a second slot is provided on the rotating rod. One end of the push rod is slidably engaged with the first slot, and the second slot at one end of the rocker arm is slidably engaged with the first slot.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are: 1. The present invention designs a three-stage lever, wherein the rotating rod is the first stage, the swing rod is the second stage, and the push rod is the third stage. Each stage of the lever realizes amplification of a torque, thereby achieving the purpose of labor saving.

[0014] 2. The swing rod of the present invention is designed to be arc-shaped, and the push rod is designed to be bent, which is convenient to manufacture, and the push rod moves more smoothly on the arc track.

[0015] 3. The present invention designs the bending angle of the push rod to be between 70° and 140°, which is more convenient to operate. The folded push rod structure can make the push force of the push rod on the punch needle vertically upward, which increases the torque amplification multiple and has stronger stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of embodiment 1 of the punching pliers of the present invention.

[0017] Figure 2 It is a front view schematic diagram of the punching pliers embodiment 1 of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of Example 1 of the punching pliers of the present invention.

[0019] Figure 4It is a schematic diagram of force analysis of Example 1 of the punching pliers of the present invention.

[0020] Figure 5 This is a schematic diagram of the punching needle structure of Example 2 of the punching pliers of the present invention.

[0021] Figure 6 This is a schematic diagram of the push rod structure of Example 2 of the punching pliers of the present invention.

[0022] Figure 7 This is a schematic diagram of the needle structure of Example 3 of the punching forceps of the present invention.

[0023] Figure 8 This is a schematic diagram of the connection of the power components of Example 3 of the punching pliers of the present invention.

[0024] Fig. 9 It is a schematic diagram of the swing arm structure of Example 4 of the punching pliers of the present invention.

[0025] In the figure, the pliers body 1, the handle 2, the punch needle 3, the return spring 31, the needle cap 32, the base 33, the needle body 34, the pliers mouth 11, the pliers groove 12, the left groove plate 121, the right groove plate 122, the rotating rod 4, the limiting column 41, the slide groove 42, the rocker arm 5, the push rod 6, the clamping groove 61, the inverted U-shaped connecting piece 7, the card slot 8, and the groove 9. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are described below in conjunction with the accompanying drawings and examples. However, the following examples are only used to illustrate the present invention in detail and do not limit the scope of the present invention in any way.

[0027] Embodiment 1: A punching pliers, see Figure 1 and Figure 2 , including a pliers body 1, a handle 2, a punch 3 and a power component. The pliers body 1 includes a pliers mouth 11 and a pliers groove 12. The pliers mouth 11 is located at the top of the pliers body 1. The pliers groove 12 includes a left groove plate 121 and a right groove plate 122. The left groove plate 121 and the right groove plate 122 are integrally formed with the pliers mouth 11 and are located on both sides of the pliers mouth 11. The two groove plates are arranged in parallel, and the gap between them forms the pliers groove 12.

[0028] The lower jaw of the pliers mouth 11 has a through hole, and the punching needle 3 is arranged in the through hole. The upper jaw of the pliers mouth 11 is provided with a needle cap 32. The handle 2 is fixed at the bottom of the pliers groove 12. The power component is connected to the pliers body 1 to push the punching needle 3 to move up and down. The punching needle 3 is provided with a return spring 31. One end of the return spring 31 abuts against the bottom of the punching needle 3, and the other end abuts against the bottom of the pliers mouth 11. The power component includes a rotating rod 4, a swing rod 5, and a push rod 6 that are rotatably connected in the pliers groove 12, see Figure 3The top of the rotating rod 4 is rotatably connected to the top of the clamp groove 12, one end of the rocker arm 5 is rotatably connected to the clamp groove 12, and the other end abuts against the rotating rod 4, the middle part of the push rod 6 is rotatably connected to the clamp groove 12, one end of the push rod 6 abuts against the upper surface of the rocker arm 5, and the other end abuts against the bottom of the punch needle 3.

[0029] The handle 2 is arranged vertically, and the rotating rod 4 is arranged obliquely downward. In the static state, the top of the handle 2 abuts against the bottom surface of the swing rod 5. The swing rod 5 is arc-shaped, and its outer arc surface faces the side of the rotating rod 4. The arc-shaped swing rod makes the movement of the push rod on it smoother and more labor-saving. The push rod 6 is a folding structure, and its bending part is rotatably connected with the clamp groove 12. The outer surface of the bending part faces the side of the swing rod 5. The bending angle of the push rod 6 is between 70°-140°, which is easier to operate. If the angle is too large, the side where the push rod abuts against the punch is too upturned, and the punch stroke is short, which is not conducive to torque amplification. If the angle is too small, the punch stroke is too large, and the opening distance between the rotating rod and the handle needs to be increased, which is not conducive to hand-held operation.

[0030] As a further improvement, rollers are provided at both ends of the push rod 6 and at one end where the swing rod 5 and the rotating rod 4 abut. A transverse limit column 41 is provided above the rotating rod 4 at the upper part of the clamp groove 12. A slide groove 42 is provided inside the rotating rod 4, and the roller at the end of the swing rod 5 is provided in the slide groove 42. The width of the slide groove 42 matches the thickness of the roller at the end of the swing rod 5, which is conducive to ensuring the stability of the action.

[0031] For the analysis of the force applied to the punching pliers mentioned above, see Figure 4 , the rotating rod 4 is subjected to the downward oblique grip force F1 and rotates downward, and its horizontal component force F2 acts on the swing rod 5, so that the swing rod 5 has an upward oblique thrust F3 on the push rod 6. The thrust F3 and the vertical component force of the push rod 6 drive the push rod 6 to rotate clockwise, and at this time, the upper end of the push rod 6 applies an upward thrust to the punch needle. The rotating rod 4 is used as the first-level lever, the swing rod 5 is used as the second-level lever, and the push rod 6 is used as the third-level lever. When in action, the power arm is greater than the resistance arm, which can achieve the amplification of the third moment and save more effort. The swing rod 5 is designed to be arc-shaped to increase the angle between the swing rod 5 and the push rod 6, and the component force F4 becomes larger. The position of the rotating shaft of the push rod 6 remains unchanged, and the bending angle is designed to be between 70°-140° for the most convenient operation. The use of a folded push rod structure can make the push rod thrust the punch needle vertically upward, which increases the torque amplification multiple and has stronger stability.

[0032] Embodiment 2: The difference from Embodiment 1 is the structure of the punching needle. For details, see Figure 5 and Figure 6The punch needle includes a base 33 and a needle body 34. A clamping groove 61 is provided at one end where the push rod 6 and the punch needle 3 abut. A roller is provided in the clamping groove 61. The roller abuts against the punch needle. A part of the base of the punch needle 3 is cut off so that the width matches the width of the clamping groove. After removing the roller, the punch needle can fall from the gap in the clamping groove 61, which is convenient for replacing the punch needle.

[0033] Embodiment 3: The difference from Embodiment 1 is that an inverted U-shaped connector 7 is connected to the bottom of the punch pin, see Figure 7 The inverted U-shaped connecting member 7 is rotatably connected to the end of the push rod 6 (the roller is removed here), the swing rod 5 is provided with a first slot, the rotating rod 4 is provided with a second slot, one end of the push rod 6 is slidably engaged with the first slot, and the second slot at one end of the swing rod 5 is slidably engaged with the second slot. The above-mentioned sliding engagement structure is shown in Figure 8 The rocker arm 5 and the rotating rod 4 are groove-shaped structures, and slots 8 are arranged on both sides thereof. The rotating shaft of the roller is arranged in the slots. The direct abutment relationship among the rotating rod 4, the rocker arm 5 and the push rod 6 is changed into a traction connection. At this time, pulling the rotating rod 4 outward can drive the punch needle to reset, thereby preventing the punch needle from being stuck in the material and the spring elastic force from being insufficient, resulting in the problem that the punch needle cannot be automatically withdrawn.

[0034] Embodiment 4 is different from Embodiment 1 in that the rocker rod 5 is an arc-shaped structure, a groove 9 is provided on the inner surface of the rocker rod 5 , and the end of the push rod 6 abuts against the groove 9 .

[0035] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, those skilled in the art will appreciate that, without departing from the spirit of the present invention, the specific parameters in the above embodiments may be changed to form a plurality of specific embodiments, which are all within the common variation range of the present invention and will not be described in detail herein.

Claims

1. A punching pliers, comprising a pliers body, a handle, a punching needle, and a power component, wherein a pliers mouth is provided on one side of the pliers body, the punching needle is provided in the pliers mouth, the handle is located below the pliers body, the power component is connected to the pliers body to push the punching needle to move, and characterized in that: The power component includes a rotating rod, a rocker rod and a push rod. The top end of the rotating rod is rotatably connected to the upper part of the caliper body away from the punch needle, the lower end of the rocker rod is rotatably connected to the lower part of the caliper body on the side of the punch needle, the rocker rod is inclined upward and abuts against the inner side of the upper part of the rotating rod, the push rod is located above the side of the rocker rod and is rotatably connected to the middle part of the caliper body, the lower end of the push rod abuts against the rocker rod, the upper end of the push rod abuts against the punch needle, and the distance between the connection point of the push rod and the caliper body and the contact point of the push rod and the rocker rod is greater than the distance between the connection point of the push rod and the caliper body and the contact point of the push rod and the punch needle.

2. The punching pliers according to claim 1, characterized in that: The swing rod is a smooth arc-shaped structure, and the outer arc surface of the swing rod faces one side of the rotating rod.

3. The punching pliers according to claim 1, characterized in that: The swing rod is an arc-shaped structure, a groove is arranged on the inner surface of the swing rod, and the end of the push rod is arranged in the groove.

4. The punching pliers according to claim 1, characterized in that: The push rod comprises a folding portion, which is rotatably connected to the clamp body, an outer surface of the folding portion faces one side of the swing rod, and an angle of the folding portion of the push rod is between 70° and 140°.

5. The punching pliers according to claim 1, characterized in that: Rollers are arranged at both ends of the push rod and at one end where the swing rod and the rotating rod abut against each other.

6. The punching pliers according to claim 5, characterized in that: A clamping groove is provided at one end where the push rod and the punch needle abut against each other, and the roller is provided in the clamping groove. The roller abuts against the punch needle, and the width of the punch needle matches the width of the clamping groove so that the punch needle can fall from the clamping groove after the roller is removed.

7. The punching pliers according to claim 5, characterized in that: A slide groove is arranged on the inner side of the rotating rod, and the roller at the end of the swing rod is arranged in the slide groove. The width of the slide groove matches the thickness of the roller at the end of the swing rod.

8. The punching pliers according to claim 1, characterized in that: The pliers body also includes a pliers groove, the pliers mouth is located at the top of one side of the pliers body, the pliers groove includes a left groove plate and a right groove plate, the rotating rod, the rocker rod and the push rod are all rotatably connected in the pliers groove, and a horizontal limiting column is arranged above the rotating rod in the pliers groove.

9. The punching pliers according to claim 1, characterized in that: The punch needle comprises a base and a needle body. A return spring is arranged on the punch needle. One end of the return spring abuts against the punch needle base, and the other end abuts against the bottom of the pliers mouth.

10. The punching pliers according to claim 1, characterized in that: An inverted U-shaped connector is connected to the bottom of the punch needle, and the inverted U-shaped connector is rotatably connected to the end of the push rod. A first slot is provided on the rocker arm, and a second slot is provided on the rotating rod. One end of the push rod is slidably engaged with the first slot, and the second slot at one end of the rocker arm is slidably engaged with the first slot.

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