CN221892118U - Punch pliers - Google Patents

Abstract

The utility model discloses a punching pliers to solve the technical problem that the existing punching pliers are not labor-saving enough. In order to solve the above technical problems, the utility model adopts the following technical scheme: a punching pliers is designed, including: a handle, including a fixed rod and a rotating rod; a pliers body, an opening is provided on one side of the upper part of the pliers body, the opening has an upper jaw and a lower jaw, the lower jaw is provided with a punching needle hole, the upper part of the fixed rod is fixedly connected to one side of the pliers body opening, and the upper part of the rotating rod is hinged to the opposite side of the pliers body opening; a punching needle, the punching needle is located below the opening of the pliers body, and its top end is arranged in the punching needle hole of the lower jaw; a pressure strip, including a power arm and a resistance arm, the front end of the power arm is hinged to the lower part of the pliers body, and the other end is arranged obliquely upward and abuts against the rotating rod, the resistance arm is arranged on the upper side of the power arm, and the bottom of the punching needle abuts against the pliers body or the resistance arm. The beneficial effects of the utility model are: simplifying the device structure and saving more labor.

Description

Punch pliers

Technical Field

The utility model relates to the technical field of hardware tools, in particular to a punching pliers.

Background Art

Punching pliers are a tool for punching holes in plate-like materials such as leather, paper, thin metal, and plastic. The punch is driven by a handle, and the handle is connected by rotation to form a lever. According to the principle of leverage, the longer the handle, the less effort it takes. However, if the handle is too long, the distance between the two handles will be too large and inconvenient to operate. If the handle is too short, it will be more laborious. Therefore, it is necessary to complete the punching work as labor-saving as possible at a suitable handle length. For handles of the same length, during the punching process, as the punch is squeezed against the punching object, the resistance of the handle becomes greater and greater. The applicant has obtained the solution of this application after many adjustments and settings and continuous experiments to address these problems. The solution of this case has achieved good technical effects in solving the above-mentioned technical problems.

Summary of the invention

The utility model provides a punching pliers to solve the technical problem that the existing punching pliers are not labor-saving enough.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

Design a punching pliers, including:

A handle, including a fixed rod and a rotating rod;

A caliper body, an opening is provided on one side of the upper part of the caliper body, the opening has an upper jaw and a lower jaw, the lower jaw is provided with a punching pin hole, the upper part of the fixed rod is fixedly connected to one side of the caliper body opening, and the upper end of the rotating rod is hinged to the upper part of the caliper body on the opposite side of the caliper body opening;

A punching needle, the punching needle is located below the opening of the pliers body, and the top end of the punching needle is arranged in the punching needle hole of the lower jaw;

The pressure strip includes a power arm and a resistance arm. The front end of the power arm is hinged to the lower part of the pliers body through a hinge and the hinge is located below the punch needle. The other end is arranged obliquely upward and abuts against the rotating rod. The angle between the power arm and the rotating rod on the pliers body side is greater than 90 degrees. The resistance arm is arranged on the upper side of the power arm. The power arm and the resistance arm rotate around the hinge. The distance from the front end of the power arm to the hinge is greater than the distance from the front end of the resistance arm to the hinge. The bottom of the punch needle abuts against the pliers body or the resistance arm. The rotating rod pushes the power arm to rotate upward so that the resistance arm pushes the punch needle upward.

Furthermore, a clamping groove is provided inside the clamp body, the rotating rod is hinged at the top of the clamping groove, and the pressure strip is hinged at the bottom of the clamping groove.

Furthermore, a vertical fixing groove is provided on the surface of the clamp body, and the fixing rod is fixed in the fixing groove.

Furthermore, a first limit pin is provided on the clamp body above the rotating rod and/or a second limit pin is provided on the clamp body below the pressure strip.

Furthermore, a rear roller is provided at the end of the power arm of the pressure strip, and the rear roller is abutted against the rotating rod. A front roller is provided at the end of the resistance arm of the pressure strip, and the front roller is located below the punching needle.

Furthermore, the punching needle comprises a needle body, a base, and a connecting sleeve, wherein the bottom of the connecting sleeve and the base are threadedly connected or integrally formed, the top of the connecting sleeve is provided with a needle groove, the needle body is arranged in the needle groove, and the needle body and the needle groove are threadedly connected or integrally formed.

Furthermore, a return spring is arranged on the punch pin, one end of the return spring abuts against the top surface of the connecting sleeve, and the other end abuts against the bottom surface of the lower jaw of the caliper body. Alternatively, the return spring can also be arranged between the fixed rod and the rotating rod.

Furthermore, the upper jaw of the pliers body is provided with a punch cap, the punch cap includes a clamping bolt and a cap body, the upper jaw of the pliers body is provided with a punch cap hole, the punch cap hole has a step portion, the cap body is arranged in the punch cap hole and abuts against the step portion, the clamping bolt is threadedly connected with the punch cap hole and clamps the cap body. Alternatively, the punch cap includes a cap column and a cap head, the cap head is located below the upper jaw of the pliers body and abuts against the lower edge of the punch cap hole, the cap column is located in the punch cap hole, and a top screw is arranged on the side of the upper jaw of the cavity to fix the punch cap.

Compared with the prior art, the beneficial technical effects of the utility model are:

The utility model connects the top of the rotating rod and the top of the pliers body to increase the effective length of the rotating rod subjected to force. In the process of the rotating rod rotating toward the fixed rod, as the pressure strip moves upward, for the rotating rod, the front end of the pressure strip moves upward at the abutment between the rotating rod and the rotating rod, so that the force arm of the rotating rod will increase, the force arm of the resistance will become smaller, and more labor-saving.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic front view of the punching pliers of the present invention.

FIG. 2 is a schematic right side view of the punching pliers of the present invention.

FIG. 3 is a schematic diagram of the pliers body structure of the utility model punching pliers.

FIG. 4 is a schematic diagram of a right side view of the pliers body of the utility model.

FIG. 5 is a schematic diagram of the fixing rod structure of the punching pliers of the present invention.

FIG. 6 is a schematic diagram of the pressure strip structure of the punching pliers of the present invention.

FIG. 7 is a schematic diagram of the punch cap structure of the punching pliers of the present invention.

In the figure, a handle 1, a rotating rod 11, and a fixed rod 12;

The clamp body 2 has an opening 21, an upper jaw 22, a lower jaw 23, a clamping groove 24, a fixing groove 25, a groove 26, a first limiting pin 27, and a second limiting pin 28;

Punching needle 3, needle body 31, connecting sleeve 32, base 33, return spring 34;

Pressing bar 4, power arm 41, resistance arm 42, hinge 43, rear roller 44, front roller 45;

Tighten the bolt 51 and the cap body 52.

DETAILED DESCRIPTION

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

Embodiment 1: A punching pliers, see Figures 1 and 2, includes a handle 1, a pliers body 2, a punch needle 3, and a pressure strip 4, wherein the structure of the pliers body 2 is shown in Figures 3 and 4, the pliers body 2 is arranged at the upper part of the punching pliers, and the top of the pliers body 2 is provided with an inverted U-shaped opening 21, the opening 21 has an upper jaw 22 and a lower jaw 23, the lower part and the side of the pliers body 2 have a connecting clamping groove 24, the handle 1 includes a rotating rod 11 and a fixed rod 12, the rotating rod 11 is arranged in the clamping groove on the left side of the pliers body 2, and its top is hinged to the pliers body 2, and the fixed rod 12 is fixed to the right side of the pliers body 2.

The structure of the fixing rod is shown in Figure 5, including a grip rod 121 at the bottom and two clamping plates 122 at the top. Vertical fixing grooves 25 are set on the front and rear surfaces of the pliers body 2. Fixing the clamping plates 122 at the top of the fixing grooves 25 is more conducive to maintaining structural stability, and at the same time, the fixing rod is fixed relatively firmly relative to the pliers body 2.

A groove 26 for accommodating the punching needle 3 is provided on the right side of the pliers body 2, and the bottom of the groove 26 has a chamfer. The top of the punching needle 3 is located in the punching needle hole provided on the lower jaw 23. The punching needle 3 includes a needle body 31, a connecting sleeve 32, and a base 33. A needle groove is provided on the top of the connecting sleeve 32, and the bottom of the needle body 31 is provided in the needle groove. The needle groove serves as a limit for the needle body 31. The bottom of the connecting sleeve 32 is threadedly connected to the base 33, and the length of the punching needle 3 can be adjusted by adjusting the base 33. In some other embodiments, the needle body 31, the base 33, and the connecting sleeve 32 can be integrally formed, or the base 33 and the connecting sleeve 32 are integrally formed, and the needle grooves on the needle body 31 and the connecting sleeve 32 are threadedly connected.

As a further improvement, the punch 3 further includes a return spring 34, one end of which abuts against the connecting sleeve 32, and the other end abuts against the bottom surface of the lower jaw 23 of the caliper body 2. A return spring may also be provided between the fixed rod 12 and the rotating rod 11, specifically, in the clamping groove 24 where the top of the rotating rod 11 is located.

A pressure strip 4 is arranged in the clamping groove below the pliers body 2. The structure of the pressure strip 4 is shown in FIG6 , and includes a power arm 41 and a resistance arm 42. The right end of the power arm 41 is hinged to the pliers body 2 through a hinge 43, and the left end is abutted to the rotating rod 11 through a rear roller 44. The resistance arm 42 is arranged on the upper side of the power arm 41. Both the power arm 41 and the resistance arm 42 are tilted to the upper left. The tilting direction of the resistance arm 42 is the same as that of the power arm 41. A front roller 45 is arranged at the end of the resistance arm 42. The angle between the power arm 41 and the rotating rod 11 in the direction of the pliers body 2 should be set to be greater than 90 degrees, specifically, the angle between the straight line from the abutment point of the rear roller 44 and the rotating rod 11 to the hinge 43 and the straight line where the rotating rod 11 is located. The distance from the rear roller 44 of the power arm 41 to the hinge 43 is greater than the distance from the front roller 45 of the resistance arm 42 to the hinge 43, and generally there is at least a two-fold difference, so that the effort-saving force can be reflected. When the power arm 41 rotates, it can drive the resistance arm 42 to push the punch needle upward.

A first limit pin 27 is provided on the pliers body 2 at the upper left of the rotating rod 11. The first limit pin 27 mainly limits the outward rotation range of the rotating rod 11. At the same time, when the second limit pin 28 is not provided, it can also block the downward rotation range of the pressure strip 4 and can also make the resistance arm 42 keep against the base 33 to prevent the punch 3 from falling off from the lower jaw. A second limit pin 28 is provided below the pressure strip 4. The second limit pin 28 has the function of limiting the downward rotation range of the pressure strip 4 and making the resistance arm 42 keep against the base 33 to prevent the punch 3 from falling off from the lower jaw 23. To prevent the punch 3 from falling off, the bottom of the groove 26 can also be chamfered to block the punch 3. At this time, when replacing the punch 3, the pitch of the thread of the bottom of the connecting sleeve 32 and the base 33 can be adjusted to make the punch 3 disengage from the punch hole of the lower jaw 23.

The upper jaw 22 of the pliers body 2 is provided with a punch cap, see Figure 7, the punch cap includes a clamping bolt 51 and a cap body 52, the upper jaw 22 of the pliers body 2 is provided with a punch cap hole, the punch cap hole has a step portion, the cap body 52 is arranged in the punch cap hole and abuts against the step portion, the clamping bolt 51 and the punch cap hole are threadedly connected and clamp the cap body 52.

In some other embodiments, the punch cap may also adopt the following structure: including a cap column and a cap head, the cap head is located below the upper jaw of the pliers body and abuts against the lower edge of the punch cap hole, the cap column is located in the punch cap hole, and a top screw is provided on the side of the upper jaw of the cavity to fix the punch cap.

When in use, the rotating rod 11 is pressed inward to drive the pressure strip 4 to rotate clockwise around the hinge 43, and the resistance arm 42 of the pressure strip 4 rotates to push the punch needle 3 to move upward, and cooperate with the punch cap to punch a hole in the plate.

According to the lever principle, the magnification of the punching pliers can reach more than 80 times, which is very labor-saving. The following is a set of data obtained by the applicant through testing. L1 is the length of the rotating rod 11 from the top hinge to the other end, L2 is the length from the abutment point of the rear roller 44 and the rotating rod 11 to the top hinge of the rotating rod 11, L3 is the distance from the abutment point of the rear roller 44 and the rotating rod 11 to the hinge 43, L4 is the distance between the hinge 43 and the inclined straight line where the resistance arm 42 passes through the abutment point of the front roller 52 and the base 33, a is the angle between the line where L3 is located and the line where L1 is located, and b is the angle between the inclined straight line where the resistance arm 42 passes through the abutment point of the front roller 52 and the base 33 and the straight line where the needle body 31 is located. The specific measurement starting point of the hinge 43 is the axis of the hinge axis used by the hinge. Specific values, when the ejector stroke is 0mm, that is, when the ejector contacts the steel plate to be punched, when the specific values are measured as follows, L1=241.78, L2=46.02, L3=79.94, L4=4.51, a=72.8 degrees, b=14.5 degrees, the initial magnification of the vertical upward moment of the ejector is: then according to the formula L1÷L2×L3÷L4×cos a×cos b=26.66. When the ejector stroke is 1mm, the values that change at this time are: L2=39.91, L3=79.44, L4=4.7, a=62.7 degrees, b=8.5 degrees, and the magnification of the vertical upward moment of the ejector is: then according to the formula L1÷L2×L3÷L4×cos a×cos b=46.5. When the ejector stroke is 1.99≈2mm, the ejector has penetrated the steel plate. At this time, the instantaneous magnification of the vertical upward force moment received by the ejector is, ignoring the angle b of 0-0.11 degrees. The values that change at this time are: L2=33.88, L3=78.44, L4=4.92, a=43.8 degrees. The magnification of the vertical upward moment received by the ejector is: According to the formula L1÷L2×L3÷L4×cos a×cos b=82.11.

The utility model is 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 utility model, 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 utility model and will not be described in detail here.

Claims (10)

1. A punching pliers, characterized by comprising: a handle, comprising a fixed rod and a rotating rod; A caliper body, wherein an opening is provided on one side of the upper part of the caliper body, the opening has an upper jaw and a lower jaw, the lower jaw is provided with a punching pin hole, the upper part of the fixed rod is fixedly connected to one side of the caliper body opening, and the upper end of the rotating rod is hinged to the upper part of the caliper body on the opposite side of the caliper body opening; a punching pin, wherein the punching pin is located below the opening of the caliper body, and the top end of the punching pin is provided in the punching pin hole of the lower jaw; The pressure strip includes a power arm and a resistance arm. The front end of the power arm is hinged to the lower part of the pliers body through a hinge and the hinge is located below the punch needle. The other end is arranged obliquely upward and abuts against the rotating rod. The angle between the power arm and the rotating rod on the pliers body side is greater than 90 degrees. The resistance arm is arranged on the upper side of the power arm. The power arm and the resistance arm rotate around the hinge. The distance from the front end of the power arm to the hinge is greater than the distance from the front end of the resistance arm to the hinge. The bottom of the punch needle abuts against the pliers body or the resistance arm. The rotating rod pushes the power arm to rotate upward so that the resistance arm pushes the punch needle upward. 2. The punching pliers according to claim 1 are characterized in that a clamping groove is provided inside the pliers body, the upper part of the rotating rod is located in the clamping groove and is hinged to the top of the clamping groove, and the pressure strip is located in the clamping groove and is hinged to the bottom of the clamping groove. 3. The punching pliers according to claim 1 is characterized in that a vertical fixing groove is provided on the surface of the pliers body, and the fixing rod is fixed in the fixing groove. 4. The punching pliers according to claim 1, characterized in that a first limit pin is provided on the pliers body and located above the rotating rod, and/or a second limit pin is provided on the pliers body and located below the pressure strip. 5. The punching pliers according to claim 1 are characterized in that a rear roller is provided at the end of the power arm of the pressure bar, the rear roller is abutted against the rotating rod, and a front roller is provided at the end of the resistance arm of the pressure bar, and the front roller is located below the punching needle. 6. The punching pliers according to claim 1 are characterized in that the punching needle includes a needle body, a base, and a connecting sleeve, the bottom of the connecting sleeve and the base are threadedly connected or integrally formed, the top of the connecting sleeve is provided with a needle groove, the needle body is arranged in the needle groove, and the needle body and the needle groove are threadedly connected or integrally formed. 7. The punching pliers according to claim 6, characterized in that a first return spring is provided on the punching needle, one end of the first return spring abuts against the top surface of the connecting sleeve, and the other end abuts against the bottom surface of the lower jaw of the pliers body. 8. The punching pliers according to claim 1, characterized in that a second return spring is connected between the fixed rod and the rotating rod. 9. The punching pliers according to claim 1 are characterized in that the upper jaw of the pliers body is provided with a punch cap, the punch cap includes a clamping bolt and a cap body, the upper jaw of the pliers body is provided with a punch cap hole, the punch cap hole has a step portion, the cap body is arranged in the punch cap hole and abuts against the step portion, the clamping bolt and the punch cap hole are threadedly connected and clamp the cap body. 10. The punching pliers according to claim 1 are characterized in that the upper jaw of the pliers body is provided with a punch cap, and the upper jaw of the pliers body is provided with a punch cap hole, the punch cap includes a cap column and a cap head, the cap head is located below the upper jaw of the pliers body and abuts against the lower edge of the punch cap hole, the cap column is located in the punch cap hole, and a top screw is provided on the side of the upper jaw of the cavity to fix the punch cap.