Anti-abrasion cushion block for punching and punching pliers

Abstract

The utility model discloses an anti-abrasion cushion block for punching and punching pliers. The anti-abrasion cushion block for punching comprises a seat body, a cushion block body, an elastic supporting piece and a mechanical collision bead, and the cushion block body is arranged above the seat body and can slide up and down relative to the seat body; the elastic supporting piece is arranged between the seat body and the cushion block and is used for supporting the cushion block; the mechanical collision bead is installed on the base body and can horizontally slide to stretch out and retract relative to the base body, the side surface of the cushion block is provided with a release groove correspondingly matched with the stretching-out state of the mechanical collision bead, and along with downward sliding of the cushion block, the mechanical collision bead is switched to the stretching-out state from the retracting state and clamped into the release groove. The structure can well feed back whether an operator is in a punching state or not, so that the situation that the operator continuously applies force to damage the cushion block and the punching knife is avoided, the service life of the punching pliers is comprehensively prolonged, and the punching on-off rate is comprehensively increased.

Description

Technical Field

[0001] The utility model relates to the field of hole punching pliers, in particular to an anti-wear cushion block for hole punching and a hole punching pliers including such an anti-wear cushion block for hole punching. Background Art

[0002] The hole punching pliers usually adopt a way that two plier handles are cross-hinged, and the operator holds the two plier handles manually to press and open the space between the two plier handles, so as to apply an impact force to the object to be penetrated (such as belt holes, paper, metal plates, etc.) to complete the hole punching operation. For the current common hole punching pliers with a hollow hole and a copper pad, the copper pad is fixed at the end of the plier handle for cooperating with the hole punching knife. When the operator punches a hole, it is impossible to accurately judge whether the object to be penetrated is punched through. Therefore, an excessive load force value will be applied to ensure that the object to be penetrated has been punched through. Although the object to be penetrated is punched through, it will cause cumulative damage to the hole punching knife and the copper pad. Over time, the on-off rate will decrease. At the same time, because it is impossible to continuously punch through, the applied force is gradually increased, and the degree of damage is further aggravated. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an anti-wear cushion block for hole punching and a hole punching pliers including such an anti-wear cushion block for hole punching, which are ingeniously designed, can be used to prompt that the hole punching is in place, and avoid the user from continuing to apply force to damage the copper pad and the hole punching knife.

[0004] To solve the above technical problem, the technical solution of the utility model is: the anti-wear cushion block for hole punching includes:

[0005] A seat body, serving as an installation base for the following structures;

[0006] A cushion block, arranged above the seat body and capable of sliding up and down relative to the seat body;

[0007] An elastic support member, installed between the seat body and the cushion block for supporting the cushion block;

[0008] A mechanical ball catch, installed on the seat body and capable of sliding horizontally relative to the seat body to extend and retract. A release groove corresponding to the extended state of the mechanical ball catch is arranged on the side surface of the cushion block. As the cushion block slides downward, the mechanical ball catch switches from the retracted state to the extended state and snaps into the release groove.

[0009] As a preferred technical solution, a ball catch accommodation groove is arranged on the side surface of the seat body. The mechanical ball catch is arranged at the outer end of the ball catch accommodation groove, and a ball catch spring is arranged between the ball catch accommodation groove and the mechanical ball catch.

[0010] As a preferred technical solution, a catch housing sleeve is installed in the catch receiving groove. The interior of the catch housing sleeve has a receiving cavity and an open outer end. The catch spring and the mechanical catch are both located in the receiving cavity. The mechanical catch is provided at the open end. The catch spring is located between the catch housing sleeve and the mechanical catch. A limiting ring that can fit against the outer surface of the mechanical catch is provided at the open end of the catch housing sleeve.

[0011] As a preferred technical solution, a guiding post is provided at the bottom end of the cushion block. A guiding hole is penetrated through the surface of the seat body. The bottom end of the guiding post passes through the guiding hole and is provided with a limiting member that is limited to the bottom end of the seat body.

[0012] As a preferred technical solution, the limiting member is a limiting screw threadedly connected to the guiding post, and the head of the limiting screw is located at the bottom end of the seat body.

[0013] As a preferred technical solution, a support member receiving groove is provided in an open manner at the top end of the seat body. The cushion block is buckled on the top end of the seat body. The elastic support member is provided in the support member receiving groove and is clamped between the cushion block and the seat body.

[0014] As a preferred technical solution, the elastic support member is a disc spring, a compression spring, a leaf spring, an air spring or a rubber spring.

[0015] As a preferred technical solution, a limiting and protecting step that abuts against the bottom end of the cushion block is further provided on the seat body.

[0016] As a preferred technical solution, an operation platform protruding upward is provided on the upper surface of the cushion block.

[0017] Another preferred technical solution: A punching pliers includes a pliers handle and a punching cutter head, and further includes the anti-wear cushion block for punching, and the anti-wear cushion block for punching is correspondingly matched with the punching cutter head.

[0018] Due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows: By improving the cushion block and the seat body, and utilizing the relationship between the elastic force of the disc spring and the cushion block and the punching force of the object to be penetrated, after the object to be penetrated is completely punched through, the mechanical catch is released through the position change of the cushion block, and a punching penetration prompt sound is emitted, which can better feedback the state of whether the operator has perforated, thereby avoiding continuous application of force to damage the cushion block and the punching cutter, and comprehensively improving the service life and punching on-off rate of the punching pliers. At the same time, this structure also has the advantages of simple structure, ingenious design, small occupied volume, no influence on operation, low cost, wide application range, great economic value, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following attached drawings are only intended to illustrate and explain the present utility model, and do not limit the scope of the present utility model.

[0020] Figure 1 It is a schematic structural diagram of a punching pliers in an embodiment of the present utility model;

[0021] Figure 2 It is a schematic structural diagram of an anti-wear cushion block for punching in an embodiment of the present utility model;

[0022] Figure 3 It is an exploded view of the anti-wear cushion block for punching in an embodiment of the present utility model;

[0023] Figure 4 It is a sectional view of the anti-wear cushion block for punching in an embodiment of the present utility model;

[0024] Figure 5 It is a sectional view of the anti-wear cushion block for punching from another angle in an embodiment of the present utility model;

[0025] Figure 6 It is a schematic diagram of the state before punching in an embodiment of the present utility model;

[0026] Figure 7 It is a schematic diagram of the state after punching in an embodiment of the present utility model;

[0027] Figure 8 It is a schematic diagram of another embodiment of the present utility model;

[0028] In the figure: 100 - pliers handle; 200 - punching cutter head; 201 - cutter wheel; 202 - punching cutter; 300 - anti-wear cushion block for punching; 301 - seat body; 302 - cushion block; 303 - elastic support member; 304 - mechanical detent; 305 - guide post; 306 - guide hole; 307 - limiting member; 308 - operation platform; 309 - support member accommodation groove; 310 - detent accommodation groove; 311 - detent spring; 312 - release groove; 313 - detent accommodation sleeve; 314 - limiting ring; 315 - limiting protection step. Detailed implementation manners

[0029] The present utility model will be further described below in conjunction with the attached 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 the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the attached drawings and description are illustrative in nature and are not used to limit the protection scope of the claims.

[0030] Embodiment 1:

[0031] Such as Figure 1As shown in the figure, a punching pliers includes a pliers handle 100, a punching cutter head 200, and an anti-wear cushion block 300 for punching. The punching cutter head 200 is installed at the front end of one of the pliers handles 100, and the anti-wear cushion block 300 for punching is installed at the front end of the other pliers handle 100. The anti-wear cushion block 300 for punching corresponds to and cooperates with the punching cutter head 200. The punching cutter head 200 includes a cutter wheel 201 and punching cutters 202 provided on the outer periphery of the cutter wheel 201. When each punching cutter 202 is at the punching station, the punching cutter 202 is just directly above the anti-wear cushion block 300 for punching, and the anti-wear cushion block 300 for punching is used to cooperate with the punching cutter 202 to smoothly achieve punching.

[0032] See Figures 2 to 5 , the anti-wear cushion block 300 for punching includes a seat body 301, a cushion block 302, an elastic support member 303, and a mechanical detent 304. The cushion block 302 is a key component that cooperates with the punching cutter 202. The material of the cushion block 302 is not limited and can be copper material or steel material with better hardness. In order to improve the service life of the cushion block 302 and reduce the wear of the cushion block 302 and the punching cutter 202, structural improvements are made to the cushion block 302 and the seat body 301 for installing the cushion block 302.

[0033] The cushion block 302 is provided above the seat body 301 and can slide up and down relative to the seat body 301. A guiding column 305 is provided at the bottom end of the cushion block 302, and a guiding hole 306 is penetrated through the surface of the seat body 301. The bottom end of the guiding column 305 passes through the guiding hole 306 and is provided with a limiting member 307 located at the bottom end of the seat body 301. The guiding column 305 cooperates with the guiding hole 306 and can slide up and down along the guiding hole 306. The limiting member 307 is used to prevent the guiding column 305 from disengaging from the seat body 301. The limiting member 307 is a limiting screw threadedly connected to the bottom end of the guiding column 305, and the head of the limiting screw is located at the bottom end of the seat body 301. Of course, the limiting member 307 can also be a clamping block clamped at the bottom end of the guiding column 305, and the clamping block abuts against the bottom end of the seat body 301 to limit the guiding column 305 to prevent disengagement. In this embodiment, two guiding holes 306, two guiding columns 305, and two limiting members 307 are provided.

[0034] The upper surface of the cushion block 302 is provided with an upwardly protruding operation platform 308 for placing the object to be penetrated, and the surface of the operation platform 308 serves as the surface in contact with the bottom end of the punching cutter 202.

[0035] The elastic support member 303 is installed between the base body 301 and the cushion block 302. The top end of the elastic support member 303 abuts against the bottom end of the cushion block 302 to support the cushion block 302, and the bottom end of the elastic support member 303 abuts against the base body 301. When the cushion block 302 is pressed downward to overcome the elastic force of the elastic support member 303, the cushion block 302 can slide downward. When the cushion block 302 is not pressed, the elastic support member 303 upwardly supports the cushion block 302 at the highest point. In this embodiment, the elastic support member 303 is a disc spring. The disc spring is sleeved outside the guide post 305. The top end of the disc spring abuts against the cushion block 302, and the bottom end of the disc spring abuts against the base body 301. The total elastic force of the disc spring is precisely designed, and the design requirement of its elastic force is: the load force for completely punching through the object to be penetrated < the total elastic force of the disc spring < the total load force required for damaging the cushion block 302. The design that the load force for completely punching through the object to be penetrated is less than the total elastic force of the elastic support member 303 is used to ensure that the object to be penetrated is completely punched through before the elastic support member 303 is pressed downward. The elastic support member 303 can also adopt a compression spring, a leaf spring, an air spring or a rubber spring.

[0036] The base body 301 serves as the installation base for other structures. The top end of the base body 301 is open and provided with a support member accommodation groove 309. The cushion block 302 is buckled on the top end of the base body 301. The elastic support member 303 is arranged in the support member accommodation groove 309 and clamped between the cushion block 302 and the base body 301. The base body 301 adopts such a groove-shaped structure, and cooperates with the cushion block 302 to install the elastic support member 303 inside, with a simple structure and beautiful appearance.

[0037] The side surface of the base body 301 is provided with a horizontally arranged ball catch accommodation groove 310. The mechanical ball catch 304 is arranged at the outer end of the ball catch accommodation groove 310. A ball catch spring 311 is arranged between the ball catch accommodation groove 310 and the mechanical ball catch 304. The mechanical ball catch 304 can horizontally slide relative to the base body 301 to extend and retract. The side surface of the cushion block 302 is provided with a release groove 312 corresponding to the extended state of the mechanical ball catch 304. As the cushion block 302 slides downward, the mechanical ball catch 304 switches from the retracted state to the extended state and snaps into the release groove 312. When the cushion block 302 does not slide downward by overcoming the pressure of the spring support member, the side surface of the cushion block 302 abuts against the mechanical ball catch 304 in the retracted state. When the cushion block 302 is pressed to the lowest point, the mechanical ball catch 304 extends and snaps into the release groove 312. The release groove 312 is a spherical surface groove that fits the surface of the mechanical ball catch 304.

[0038] The working principle of this embodiment is as follows:

[0039] When the punching knife 202 descends and touches the object to be penetrated, see the state in Figure 6 , the entire cushion block 302 is forced downward with a load force and the supporting force of the elastic support member 303. At this time, the mechanical catch 304 is squeezed by the side surface of the cushion block 302 and is in a retracted state;

[0040] After the object to be penetrated is punched through, at this time the elastic support member 303 is compressed, the cushion block 302 moves downward, the mechanical catch 304 gradually approaches the release point, and continues to be pressed downward. The mechanical catch 304 snaps into the release groove 312 on the side of the cushion block 302. See the state in Figure 7 , making a mechanical sound to prompt the operator that the object to be penetrated has been punched through and there is no need to continue applying force to press downward;

[0041] Release the punching knife 202, and the cushion block 302 resets upward under the rebounding force of the elastic support member 303. The mechanical catch 304 is compressed again, and at the same time the limiting member 307 prevents the cushion block 302 from coming out.

[0042] By improving the cushion block 302 and the seat body 301, the present utility model utilizes the relationship between the elastic force of the disc spring and the cushion block 302 and the punching force of the object to be penetrated. After the object to be penetrated is completely punched through, the mechanical catch 304 is released through the position change of the cushion block 302, and a punching penetration prompt sound is emitted, which can better feedback the state of whether the operator has perforated, thereby avoiding continuous force application to damage the cushion block 302 and the punching knife 202, and comprehensively improving the service life and punching on-off rate of the punching pliers. At the same time, this structure also has the advantages of simple structure, ingenious design, small occupied volume, no influence on operation, low cost, wide application range, and great economic value.

[0043] Embodiment 2:

[0044] The structure of Embodiment 2 is basically the same as that of Embodiment 1. In order to increase the volume of the mechanical prompt sound, improvements are made on the basis of the structure of Embodiment 1.

[0045] See Figure 8, a catch housing sleeve 313 is installed in the catch housing groove 310. The catch housing sleeve 313 is fixed in the catch housing groove 310. The interior of the catch housing sleeve 313 has a receiving cavity and an open outer end. The catch spring 311 and the mechanical catch 304 are both located in the receiving cavity. The mechanical catch 304 is arranged at the open end. The catch spring 311 is located between the catch housing sleeve 313 and the mechanical catch 304. A limiting ring 314 that can fit with the outer surface of the mechanical catch 304 is provided at the open end of the catch housing sleeve 313. When the cushion block 302 is pressed and slides downward, when the mechanical catch 304 extends and snaps into the release groove 312, the mechanical catch 304 just touches the limiting ring 314 and makes a sound when hitting the limiting ring 314; at this time, there is not only the prompt sound of the impact between the mechanical catch 304 and the release groove 312, but also the prompt sound of the impact with the limiting ring 314, and the volume of the two impact prompt sounds is louder. The limiting ring 314 not only has the function of increasing the prompt sound, but also can limit the mechanical catch 304 within the catch housing sleeve 313. The limiting ring 314 can be fixed on the catch housing sleeve 313 by welding.

[0046] Embodiment Three:

[0047] The structure of Embodiment Three is basically the same as that of Embodiment One, and is further improved on the basis of the structure of Embodiment One.

[0048] A limiting and protecting step 315 that abuts against the bottom end of the cushion block 302 is further provided on the base body 301. The limiting and protecting step 315 is used to limit the lowest point of the cushion block 302. When the mechanical catch 304 just snaps into the release groove 312, a mechanical sound is emitted to prompt the user that the object to be penetrated has been penetrated and there is no need to continue applying force to press down. At the same time, the bottom end of the cushion block 302 just abuts against the limiting and protecting step 315, which can prevent the elastic support member 303 from being further compressed and failing.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Wear-resistant pad for punching, characterized in that, Comprising: A base body, serving as a mounting base for the following various structures; A cushion block, disposed above the base body and capable of sliding up and down relative to the base body; An elastic support member, installed between the base body and the cushion block for supporting the cushion block; A mechanical detent, installed on the base body and capable of sliding horizontally relative to the base body to extend and retract. A release groove corresponding to the extended state of the mechanical detent is provided on the side surface of the cushion block. As the cushion block slides downward, the mechanical detent switches from the retracted state to the extended state and snaps into the release groove.

2. The anti-wear cushion block for punching according to claim 1, characterized in that: A detent receiving groove is provided on the side surface of the base body. The mechanical detent is disposed at the outer end of the detent receiving groove. A detent spring is provided between the detent receiving groove and the mechanical detent.

3. The anti-wear cushion block for punching according to claim 2, wherein: A detent receiving sleeve is installed in the detent receiving groove. The interior of the detent receiving sleeve has a receiving cavity and an open outer end. The detent spring and the mechanical detent are both located in the receiving cavity. The mechanical detent is disposed at the open end. The detent spring is located between the detent receiving sleeve and the mechanical detent. A limiting ring that can fit against the outer surface of the mechanical detent is provided at the open end of the detent receiving sleeve.

4. The anti-wear cushion block for punching according to claim 1, characterized in that: A guiding post is provided at the bottom end of the cushion block. A guiding hole is provided through the surface of the base body. The bottom end of the guiding post passes through the guiding hole and is provided with a limiting member that is limited to the bottom end of the base body.

5. The anti-wear cushion block for punching according to claim 4, characterized in that: The limiting member is a limiting screw threadedly connected to the guiding post. The head of the limiting screw is located at the bottom end of the base body.

6. The anti-wear cushion block for punching according to claim 1, wherein: The top end of the base body is open to form a support member receiving groove. The cushion block is buckled on the top end of the base body. The elastic support member is disposed in the support member receiving groove and clamped between the cushion block and the base body.

7. The anti-wear cushion block for punching according to claim 1, wherein: The elastic support member is a disc spring, a compression spring, a leaf spring, an air spring or a rubber spring.

8. The anti-wear cushion block for punching according to claim 1, characterized in that: A limiting and protecting step that abuts against the bottom end of the cushion block is further provided on the base body.

9. The anti-wear cushion block for punching according to claim 1, wherein: An operation platform protruding upward is provided on the upper surface of the cushion block.

10. Punching pliers, comprising a pair of plier handles and a punching cutter head, characterized in that: It further includes an anti-wear cushion block for punching as described in any one of claims 1 to 9, and the anti-wear cushion block for punching corresponds and cooperates with the punching tool bit.

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