Rivet forcible entry structure

Abstract

The utility model discloses a rivet forcible entry structure, relates to the related technical field of riveting tools, and is used for solving the problem of low forcible entry efficiency of an existing rivet. The rivet forcible entry structure is used for the riveting tool, the riveting tool comprises a shell and a transmission assembly arranged in the shell, the rivet forcible entry structure comprises a connecting ring, the connecting ring is provided with a containing channel penetrating in the axial direction of the connecting ring, and the connecting ring is used for being fixedly connected with a transmission front shell of the transmission assembly; the execution end extends into the accommodating channel through the opening of the transmission front shell; the forcible entry clamping jaw is arranged in the containing channel, the forcible entry clamping jaw comprises a body part and at least two elastic arms connected with the body part, the body part is connected between the execution end and the elastic arms, and a clamping part is arranged at the end, back to the body part, of each elastic arm; when the forcible entry clamping jaw is driven by the execution end to move in the direction of retracting into the connecting ring in the axial direction, the clamping parts can get close to each other and clamp the lantern ring under the extrusion action of the connecting ring, and the lantern ring is separated from the nail rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of riveting tools, in particular to a rivet breaking structure. BACKGROUND

[0002] A rivet is a mechanical fastener used to connect or secure materials, widely used in construction, aviation, automotive, electronics and other industries. Rivets provide strength and stability by forming a permanent connection between materials. The installation of rivets usually requires riveting tools such as rivet guns or rivet machines. The installation process includes inserting the rivet into a pre-drilled hole, and then deforming the rivet by applying pressure or tension to achieve a fixed connection of the riveted structure.

[0003] During the maintenance of the riveted structure or when the existing riveted structure needs to be modified or improved, it may be necessary to remove certain components for inspection, repair or replacement. Since the rivet is a permanent connection, it cannot be simply unscrewed like a bolt, so the rivet needs to be broken.

[0004] However, breaking the rivet usually requires the use of special tools and techniques. For example, using a cutting tool such as an angle grinder to cut off the rivet head. Or, using a drill bit to drill a hole in the center of the rivet until the rivet head falls off. Either way, the efficiency of breaking the rivet is low. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a rivet breaking structure that can solve the problem of low efficiency of breaking the existing rivet.

[0006] To achieve the above purpose, the rivet breaking structure provided by the present application is used for a riveting tool, which comprises a housing and a transmission assembly arranged in the housing, the transmission assembly comprising a transmission module and a transmission front shell for mounting the transmission module, the transmission front shell being provided with an opening for the execution end of the transmission module to pass through, and the rivet breaking structure comprising:

[0007] A connecting ring having an accommodation channel passing through in the axial direction thereof, the connecting ring being used for fixed connection with the transmission front shell so that the execution end extends into the accommodation channel through the opening;

[0008] A breaking claw arranged in the accommodation channel, the breaking claw comprising a body portion and at least two elastic arms connected to the body portion, the body portion being connected between the execution end and each elastic arm, and each elastic arm being provided with a clamping portion at an end opposite to the body portion;

[0009] When the breaking claw is moved along the axial direction under the driving of the execution end and shrinks into the connecting ring, the clamping portions can be closed to each other under the extrusion of the connecting ring and clamp the sleeve ring, and the sleeve ring is separated from the nail rod.

[0010] In some embodiments of the present application, the connecting ring comprises a first ring body and a second ring body, and the first ring body is connected between the second ring body and the transmission front shell in the axial direction and is detachably connected with the second ring body.

[0011] In some embodiments of the present application, the body portion is detachably connected with the execution end, and the first ring body is detachably connected with the transmission front shell.

[0012] In some embodiments of the present application, there is a space between the part of the breaking claw located in the first ring body and the inner side wall of the first ring body.

[0013] In some embodiments of the present application, the second ring body has a tapered hole section and a straight hole section connected in communication;

[0014] When the breaking claw is moved along the axial direction under the driving of the execution end and shrinks into the connecting ring, the clamping portions first cooperate with the tapered hole section.

[0015] In some embodiments of the present application, each elastic arm has a connecting section connected between the clamping portion and the body portion, and the outer diameter of the connecting section has an increasing trend from the body portion to the clamping portion.

[0016] In some embodiments of the present application, a clamping channel is enclosed by the clamping portions, each clamping portion is provided with a blade on the side facing the clamping channel and opposite to the body portion, each clamping portion has an abutting end face opposite to the body portion, the plane where the blade is located and the abutting end face have a blade angle α, and 20°≤α≤70° is satisfied.

[0017] In some embodiments of the present application, the rivet breaking structure further comprises:

[0018] An adapter is detachably connected between the execution end and the body portion.

[0019] In some embodiments of the present application, the body portion and the elastic arm of the breaking claw are an integral structure and are made of a metal material.

[0020] In some embodiments of the present application, when the breaking claw is completely shrunk into the connecting ring and the clamping portions are closed to the closest position, the diameter of the clamping channel enclosed by the clamping portions is greater than or equal to the outer diameter of the nail rod.

[0021] The above-mentioned embodiments of the present application have at least the following beneficial effects:

[0022] In the specific use process, the elastic arms can be automatically closed, quickly clamped and disassembled by the extrusion of the connecting ring, the operation process does not need manual intervention, the disassembly efficiency is improved, and it is especially suitable for the quick disassembly operation of a large number of rivets. After the disassembly is completed, the elastic arms can be restored to the original position through the reverse driving of the execution end of the transmission assembly, so as to automatically release the sleeve ring, reduce the operation steps, and prepare for the next disassembly. In addition, the disassembly claw only contacts the sleeve ring, and the clamping is realized by the deformation of the elastic arm, so as to avoid the additional damage of the disassembly claw to the shank or other components, and facilitate the secondary use or recycling of the rivet. Therefore, through the simple structure design, the present application realizes the quick and accurate disassembly of the rivet, and improves the disassembly efficiency of the rivet. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 is an exploded view of the rivet disassembly structure in the embodiment of the present application;

[0025] Figure 2 is a connection schematic diagram between the rivet disassembly structure and the riveting tool in the embodiment of the present application;

[0026] Figure 3 is one of the structure schematic diagrams of the rivet disassembly structure when disassembling the rivet in the embodiment of the present application;

[0027] Figure 4 is the second structure schematic diagram of the rivet disassembly structure when disassembling the rivet in the embodiment of the present application;

[0028] Figure 5 is the third structure schematic diagram of the rivet disassembly structure when disassembling the rivet in the embodiment of the present application;

[0029] Figure 6 is the oscillogram of the existing disassembly structure when disassembling the rivet;

[0030] Figure 7 is the oscillogram of the rivet disassembly structure in the embodiment of the present application when disassembling the rivet.

[0031] Explanation of reference signs:

[0032] 1-connection ring; 1a-accommodation channel; 11-first ring body; 12-second ring body; 121-tapered hole section; 122-straight hole section;

[0033] 2-breakout claw; 21-body portion; 22-resilient arm; 221-clamping portion; 2211-clamping channel; 2212-knife edge; 2213-abutment end face; 222-connection section; 2221-first sub-section; 2222-second sub-section;

[0034] 3-adapter;

[0035] 10-housing;

[0036] 20-transmission assembly; 201-transmission module; 2011-execution end; 202-transmission front housing; 2021-opening;

[0037] 30-thimble;

[0038] 40-staple rod;

[0039] C-axial. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0042] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0043] In the description of the present application, it should be noted that unless specifically stated and limited otherwise, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixed connection, can be detachable connection, or integrally connected; can be mechanical connection, can be directly connected, can be indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] The present application provides a rivet breaking structure, which is described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0045] Breaking rivets usually requires the use of special tools and techniques. For example, using cutting tools (such as angle grinders) to cut off the rivet head; or using a drill bit to drill a hole in the center of the rivet until the rivet head falls off. No matter which way is adopted, it will result in low efficiency of rivet breaking.

[0046] Specifically, in the process of cutting with cutting tools, the material around the rivet may be damaged, especially in the case of high-speed cutting, more careful operation is required to avoid unnecessary damage to the surrounding structure. At the same time, heat will be generated during the cutting process, which may cause thermal deformation or damage to the surrounding structure. In addition, cutting tools (such as angle grinders or cutting saws) will wear out when cutting metal rivets, and the blade or abrasive disc needs to be replaced regularly.

[0047] Therefore, the rivet breaking structure provided by the embodiments of the present application is used for a riveting tool. Please refer to Figures 1-3 The riveting tool includes a housing 10 and a transmission assembly 20 arranged in the housing 10. The transmission assembly 20 includes a transmission module 201 and a transmission front shell 202 for mounting the transmission module 201, and the transmission front shell 202 is provided with an opening 2021 for the execution end 2011 of the transmission module 201 to pass through.

[0048] The rivet breaking structure comprises a connecting ring 1 and a breaking jaw 2. The connecting ring 1 has a receiving channel 1a penetrating through the axial direction C thereof, and is fixedly connected with the transmission front shell 202, so that the execution end 2011 of the transmission assembly 20 extends into the receiving channel 1a through the opening 2021. The breaking jaw 2 is arranged in the receiving channel 1a and comprises a body part 21 and at least two elastic arms 22 connected with the body part 21. The body part 21 is connected between the execution end 2011 and each elastic arm 22, and each elastic arm 22 is provided with a clamping part 221 at an end opposite to the body part 21. When the breaking jaw 2 is driven by the execution end 2011 to move in the axial direction C towards the direction of retracting into the connecting ring 1, the clamping parts 221 can be close to each other and clamp the sleeve ring 30 under the extrusion of the connecting ring 1, and separate the sleeve ring 30 from the rivet shaft 40.

[0049] In the technical scheme, the opening 2021 formed in the transmission front shell 202 is in cooperation and communication with the receiving channel 1a of the connecting ring 1, so that the execution end 2011 (for example, the end of a lead screw) of the transmission assembly 20 can smoothly extend into the receiving channel 1a and be mechanically connected with the breaking jaw 2, so as to ensure that the power can be effectively transmitted from the transmission assembly 20 to the breaking jaw 2, and the efficient energy transmission and work execution of the breaking jaw 2 are realized. The elastic arms 22 of the breaking jaw 2 are elastic, so that the elastic arms 22 can automatically adjust the shape under the extrusion of the connecting ring 1, so that the clamping parts 221 thereof are close to each other and clamp the sleeve ring 30, thereby having a self-adaptive clamping function, which can adapt to sleeve rings 30 of different sizes and shapes, and the adaptability of the breaking tool to different working conditions is improved.

[0050] Specifically, in the use process, the clamping parts 221 of the elastic arms 22 can be automatically close to each other under the extrusion of the connecting ring 1, quickly clamp and disassemble the sleeve ring 30, and the operation process does not need manual intervention, thereby improving the disassembly efficiency and being particularly suitable for the rapid breaking operation of a large number of rivets. After the breaking is completed, the elastic arms 22 can be restored to the original position through the reverse driving of the execution end 2011 of the transmission assembly 20, and the sleeve ring 30 is automatically released, so that the operation steps are reduced and the preparation work for the next breaking is completed. Moreover, the breaking jaw 2 only contacts with the sleeve ring 30, and the clamping is realized by the deformation of the elastic arms 22, so that the breaking jaw 2 does not cause additional damage to the rivet shaft 40 or other assemblies, which is beneficial to the secondary use or recycling of the rivet. Therefore, through the simple structure design, the rivet can be quickly and accurately disassembled, and the disassembly efficiency of the rivet is improved.

[0051] When the rivet needs to be broken, the operator can connect the connecting ring 1 and the shell 10, and connect the body part 21 of the breaking jaw 2 with the execution end 2011 of the transmission assembly 20, so as to drive the breaking jaw 2 to move linearly along the axial direction C by means of the original transmission tool in the riveting tool, thereby increasing the application range of the riveting tool. That is, the riveting tool can not only be used for pull riveting of the rivet, but also can be used for breaking of the rivet.

[0052] It should be noted that the existing rivet has a situation that the shank 40 does not extend out of the sleeve ring 30, and the breaking jaw 2 provided by the present application only contacts the sleeve ring 30, and the sleeve ring 30 is clamped by means of the deformation of the elastic arm 22. Therefore, the above-mentioned rivet breaking structure provided by the present application can also be applied to the breaking of this type of rivet.

[0053] Optionally, the connecting ring 1 comprises a first ring body 11 and a second ring body 12. In the axial direction C, the first ring body 11 is connected between the second ring body 12 and the transmission front shell 202, and is detachably connected with the second ring body 12. Specifically, the first ring body 11 is equivalent to only having the functions of connection and accommodation (such as the breaking jaw 2), and the second ring body 12 is used to press the elastic arm 22 of the breaking jaw 2, which is more prone to wear or damage. By detachably connecting the first ring body 11 and the second ring body 12, when the second ring body 12 is worn or damaged, it is not necessary to replace the entire connecting ring 1, but only the second ring body 12 that is worn or damaged needs to be replaced, thereby reducing the maintenance cost of the rivet breaking structure.

[0054] In addition, the first ring body 11 is connected with the transmission front shell 202, so it needs to bear a larger axial force C, and the second ring body 12 cooperates with the breaking jaw 2, so it needs to have better wear resistance. By adopting the above design, the connecting ring 1 is divided into the first ring body 11 and the second ring body 12, and different materials or different design optimizations can be selected according to specific working conditions to meet diversified use requirements.

[0055] Among them, the first ring body 11 and the second ring body 12 can be connected by thread connection, buckle structure or other detachable connection mode. For the embodiment in which the first ring body 11 and the second ring body 12 are connected by thread connection, an inner thread is arranged on the inner side wall of the first ring body 11, and an outer thread matched with the inner thread is arranged on the outer side wall of the second ring body 12, so that the operator can realize the connection or disconnection of the two by rotating the first ring body 11 or the second ring body 12.

[0056] In order to prevent the hands from slipping during disassembly or installation, improve the safety and convenience of operation, the outer side wall of the second ring body 12 can also be provided with an anti-skid structure, which can increase the friction between the fastener and the second ring body 12, and facilitate the disassembly and installation between the first ring body 11 and the second ring body 12. For example, the anti-skid structure is a platform or anti-skid pattern.

[0057] In some embodiments of the present application, the body part 21 is detachably connected with the execution end 2011, and the first ring body 11 is detachably connected with the transmission front shell 202. Therefore, when it is necessary to break the rivet by the riveting tool, the operator can connect the body part 21 with the execution end 2011, and connect the first ring body 11 with the transmission front shell 202. When it is necessary to pull the rivet by the riveting tool, the operator can detach the body part 21 and the execution end 2011, and detach the first ring body 11 and the transmission front shell 202, and then replace the corresponding pull rivet structure. In other words, the riveting tool can be switched between the two different working modes of breaking the rivet and pulling the rivet, and the operator does not need to use complex tools or go through a tedious reassembly process. By simply detaching and installing the corresponding parts, the riveting tool can be quickly converted from the breaking mode to the pulling mode, so that the riveting tool has the functions of breaking and pulling, which is equivalent to integrating two different types of tools into one, thereby improving the use flexibility and utilization rate of the riveting tool.

[0058] Alternatively, the body part 21 and the execution end 2011, the first ring body 11 and the transmission front shell 202, and the first ring body 11 and the second ring body 12 can be detachably connected by threaded connection. Of course, in other embodiments of the present application, the body part 21 and the execution end 2011, the first ring body 11 and the transmission front shell 202, and the first ring body 11 and the second ring body 12 can also be connected together by clamping connection, magnetic attraction connection, etc.

[0059] In some embodiments of the present application, there is a gap between the part of the breaking claw 2 located in the first ring body 11 and the inner side wall of the first ring body 11. The design of the gap can reduce the friction between the breaking claw 2 and the inner side wall of the first ring body 11 during movement or operation, thereby reducing the resistance and improving the working efficiency. At the same time, the existence of the gap can also help to reduce the wear of the breaking claw 2 due to long-term use, prolong the service life of the breaking structure. In addition, it can also avoid the wear of the breaking claw 2 with the first ring body 11 during linear movement along the axial direction C, and also can avoid the generation of heat between the breaking claw 2 and the first ring body 11 during movement due to friction and energy transmission, so as to prolong the service life of the rivet breaking structure.

[0060] In the assembly process, the gap between the break-off claw 2 and the inner side wall of the first ring body 11 provides more fault tolerance space for the installation operation, without worrying about the installation difficulty caused by the size accurate matching. To put it another way, even if the break-off claw 2 deviates slightly during installation, it can be adjusted through the gap space.

[0061] For example, the size of the gap can be adjusted according to actual needs. For example, the size of the gap can be set to between 0.5mm and 5mm to ensure that the break-off claw 2 can reduce friction resistance when moving while maintaining sufficient stability. In addition, the inner side wall of the first ring body 11 can also be provided with a guide structure (such as a guide groove) to guide the movement trajectory of the break-off claw 2.

[0062] Wherein, the axis of the first ring body 11 and the axis of the body part 21 (in the form of a ring) coincide, and at least two elastic arms 22 are uniformly connected to the end of the body part 21 around the axis. For example, when breaking off the rivet, the reaction force exerted by the connecting ring 1 on the elastic arms 22 is uniformly distributed to each elastic arm 22, avoiding the situation that excessive local stress causes premature damage to a certain elastic arm 22, thereby improving the structural stability and reliability of the entire break-off claw 2 and the components connected thereto. In addition, the plurality of elastic arms 22 are uniformly distributed around the axis, which can ensure that the break-off claw 2 generates balanced clamping force when clamping the collar 30, so that the collar 30 can be stably fixed in the break-off claw 2, and problems such as inclination and shaking of the collar 30 due to uneven clamping force are avoided, thereby improving the accuracy and efficiency of the break-off operation and ensuring that the collar 30 and the rivet shaft 40 can be smoothly separated.

[0063] Please continue to refer to Figure 3 , the second ring body 12 has a tapered hole section 121 and a straight hole section 122 connected therein, and the tapered hole section 121 is closer to the end of the second ring body 12 facing away from the first ring body 11. In other words, when the break-off claw 2 moves in the direction of retracting into the connecting ring 1 along the axial direction C under the drive of the execution end 2011, the clamping part 221 cooperates with the tapered hole section 121 first compared with the straight hole section 122. Wherein, the tapered hole section 121 can be used as a guide part, which can play a guiding role when the break-off claw 2 gradually retracts into the second ring body 12 under the drive of the execution end 2011. Due to its gradually tapered shape, the break-off claw 2 can be more conveniently and accurately introduced into the straight hole section 122, achieving precise positioning and cooperation, reducing installation deviation and difficulty, and improving assembly efficiency.

[0064] Based on the above embodiment, each elastic arm 22 has a connecting section 222 connected between the clamping section 221 and the body section 21, and the outer diameter of the connecting section 222 increases from the body section 21 to the clamping section 221, so that the elastic arm 22 has a progressive characteristic during the application of the clamping force. When the clamping is just started, the connecting section 222 of the elastic arm 22 first contacts the large end of the tapered hole section 121, and as the breaking claw 2 moves, the clamping force of the connecting section 222 on the collar 30 gradually increases, ensuring that the collar 30 can be clamped firmly by the clamping section 221, which is beneficial to improve the breaking effect of the rivet breaking structure on the rivet. And, it can also avoid damage to the collar 30 or the rivet breaking structure itself due to the instantaneous clamping force being too large.

[0065] For example, in the axial direction C, the outer diameters of the clamping sections 221 are equal. The connecting section 222 is divided into a first sub-section 2221 and a second sub-section 2222, and the second sub-section 2222 is connected between the first sub-section 2221 and the clamping section 221. The inclination angle (the angle between the first sub-section 2221 and the axis of the body section 21) of the first sub-section 2221 is smaller than the inclination angle (the angle between the second sub-section 2222 and the axis of the body section 21) of the second sub-section 2222. In other words, the elastic arm 22 can be pressed closer to each other by the second ring 12 through the second sub-section 2222. When the breaking claw 2 is in the open state, at least part of the second sub-section 2222 and the clamping section 221 are located outside the second ring 12. When the breaking claw 2 is in the clamping state, the second sub-section 2222 and the clamping section 221 are both retracted into the second ring 12.

[0066] Among them, the clamping channel 2211 is formed between each clamping section 221, and the end of each clamping section 221 facing the clamping channel 2211 and away from the body section 21 is provided with a blade 2212, and each clamping section 221 has an abutting end face 2213 away from the body section 21, and the plane where the blade 2212 is located and the abutting end face 2213 have a blade angle α, and satisfy 20°≤α≤70°. The design of the blade 2212 forms a sharp part on the radial inner side of the clamping section 221 of the breaking claw 2, which is convenient for cutting into the collar 30. When the rivet is broken, when the breaking claw 2 clamps the collar 30 and applies force to the rivet shaft 40, the blade 2212 of the clamping section 221 can more effectively cut into the material of the collar 30, and cooperate with the clamping force to separate the collar 30 from the rivet shaft 40.

[0067] Specifically, a smaller blade angle α (such as close to 20°) can make the blade 2212 more easily cut into the material and have a better cutting effect. A larger blade angle α (such as close to 70°) can provide better strength and wear resistance, prevent the blade 2212 from being prematurely worn or broken, and can simultaneously ensure the cutting effect and service life of the breaking claw 2.

[0068] In some embodiments of the present application, the rivet breaking structure further comprises an adapter 3 which is detachably connected between the execution end 2011 and the body part 21. In specific use, the operator can select an adapter 3 that is suitable for the size of the execution end 2011 and the body part 21 to connect them. One end of the adapter 3 is detachably connected with the execution end 2011, and the other end is detachably connected with the body part 21. The adapter 3 can be customized according to the specific size of the execution end 2011 and the body part 21 to ensure the tightness and stability of the adaptation. One end of the adapter 3 can be provided with a first connecting structure matched with the execution end 2011, and the other end can be provided with a second connecting structure matched with the body part 21. For example, the first connecting structure and the second connecting structure can be a threaded connection structure, a buckle connection structure or a slot connection structure, etc. to realize quick and stable connection of the two.

[0069] In specific implementation, the user can select a suitable adapter 3 for connection according to the size of the rivet to be removed and the specific specifications of the execution end 2011 and the body part 21. The adapter 3 as a standardized component can be conveniently manufactured and stored for replacement at any time. At the same time, the adapter 3 can be made of high-strength material to improve the connection strength and durability, and ensure the stability and reliability of the tool during long-term use.

[0070] The body part 21 and the elastic arm 22 of the breaking claw 2 are of an integrated structure and are made of metal material. The breaking claw 2 of the integrated structure in the present application can avoid the weak connection problem that may exist in the traditional split structure. The metal material itself has high strength and toughness, and the integrated forming can further improve the mechanical properties of the overall structure, so that the breaking claw 2 is not easy to deform or damage when bearing a large breaking force, and the stable shape and working state can be maintained during the breaking operation, thereby improving the breaking efficiency and reliability.

[0071] In order to improve the wear resistance between the second ring body 12 and the breaking claw 2, in some embodiments of the present application, the roughness of the inner wall surface of the second ring body 12 and the outer wall surface of the breaking claw 2 is less than or equal to 0.8 microns. The inner wall surface of the second ring body 12 and the outer wall surface of the breaking claw 2 are both polished to have a surface roughness of less than or equal to 0.8 microns. For example, the roughness of the inner wall surface of the second ring body 12 is between 0.4 microns and 0.8 microns, and the roughness of the outer wall surface of the breaking claw 2 is also between 0.4 microns and 0.8 microns.

[0072] Meanwhile, in order to further improve the wear resistance between the second ring body 12 and the breaking clamp 2, the second ring body 12 and the breaking clamp 2 are made of high-hardness material. For example, the material hardness of the second ring body 12 and the breaking clamp 2 is not less than Rockwell hardness HRC40. Alternatively, a wear-resistant coating is formed on the contact surface of the second ring body 12 and the breaking clamp 2 by physical or chemical vapor deposition process.

[0073] In the specific use process, the breaking clamp 2 has a clamping state. In the clamping state, the breaking clamp 2 is retracted into the connecting ring 1, and each clamping portion 221 is close to the closest position. The diameter of the clamping channel 2211 formed by each clamping portion 221 is greater than or equal to the outer diameter of the shank 40. In other words, the outer diameter of the clamping portion 221 is equal to the inner diameter of the second ring body 12 of the connecting ring 1, and the sleeve ring 30 is clamped in the clamping channel 2211 formed by each clamping portion 221. The present application makes the diameter of the clamping channel 2211 formed by each clamping portion 221 greater than or equal to the outer diameter of the shank 40, so as to avoid damage to the blade 2212 of the clamping portion 221. For example, in the clamping state, the diameter of the clamping channel 2211 formed by each clamping portion 221 is D1, and the outer diameter of the shank 40 is d1, so that D1-d1=(0-1)mm.

[0074] Meanwhile, it should be noted that in the clamping state, there is a gap between each elastic arm 22 and its respective clamping portion 221, that is, each elastic arm 22 is independent of each other, so as to provide a deformation space for the deformation of the sleeve ring 30 when it is cut and pulled out, and facilitate the clamping portion 221 to grasp the sleeve ring 30. Specifically, the sleeve ring 30 of the present application is still in a ring-shaped integral structure after breaking, and will not be separated into two or more parts, so as to facilitate the collection or arrangement of the sleeve ring 30 after breaking through the clamping of the clamping portion 221.

[0075] It can be understood that the breaking clamp 2 has an open state. In the open state, the breaking clamp 2 extends out of the connecting ring 1 (the second ring body 12), and each clamping portion 221 is separated from each other to the farthest position. The diameter of the clamping channel 2211 formed by each clamping portion 221 is greater than the outer diameter of the sleeve ring 30, so that the sleeve ring 30 is more easily entered into the clamping channel 2211 during the breaking process, and facilitates the clamping of the clamping portion 221 to the sleeve ring 30.

[0076] The specific process of breaking the rivet by the rivet breaking structure will be described in detail below with reference to the accompanying drawings.

[0077] As Figure 2 and Figure 3 described, when the breaking clamp 2 needs to break the rivet for the first time, the abutting end face 2213 of the clamping portion 221 is first abutted on the end face of the riveting plate, and at this time the execution end 2011 drives the breaking clamp 2 to move towards the left. AsFigure 4 As shown, when the execution end 2011 drives the breaking clamp jaw 2 to move inwards into the second ring body 12, the clamping portions 221 of the breaking clamp jaw 2 gradually close and gradually clamp the collar 30. At the same time, the cutting edges 2212 of the clamping portions 221 cut into the inside of the collar 30 to form a cut at the position where the collar 30 is in contact with the cutting edges 2212 of the clamping portions 221, so that the clamping portions 221 can continue to move inwards by clamping the collar 30 firmly through the cutting edges 2212. As shown, Figure 5 As shown, as the clamping portions 221 continue to move inwards by clamping the collar 30 firmly through the cutting edges 2212, the breaking clamp jaw 2 can pull the collar 30 off. When the clamping portions 221 of the breaking clamp jaw 2 move to the position where the clamping portions 221 are separated from the nail rod 40, the collar 30 is also separated from the nail rod 40 under the clamping of the clamping portions 221.

[0078] As shown, Figure 6 and Figure 7 In the test verification, the rivet breaking structure of the present application is compared with the existing cutting type breaking structure (i.e. cutting the collar 30 into two halves along the axial direction C), and the same specification of rivets is broken by using the two breaking structures. Specifically, the maximum value of the current value when the cutting type breaking structure is cut is about 61.6A, the breaking time lasts about 3S, the breaking force is about 58Kn, and the number of rivets broken by using a double 18V / 5.0AH battery pack is about 200-250. However, the maximum value of the current value when the rivet breaking structure of the present application is broken is about 28A, the breaking time lasts about 1.6S, the breaking force is about 25-32Kn, and the number of rivets broken by using a double 18V / 5.0AH battery pack is about 450-500.

[0079] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0080] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. In addition, the specific examples are applied in the description of the present application to describe the principles and implementation manners of the present application, and the above description of the embodiments is only used to help understand the method and core idea of the present application, and the content of the description should not be understood as a limitation of the present application.

Claims

1. A rivet breaking structure for a riveting tool, the riveting tool including a housing and a transmission assembly provided in the housing, the transmission assembly including a transmission die set and a transmission front case for mounting the transmission die set, the transmission front case having an opening formed therein for the execution end of the transmission die set to pass through, characterized in that, The rivet breaking structure comprises: a connecting ring having an accommodating channel penetrating through the connecting ring in an axial direction, the connecting ring being fixedly connected with the transmission front shell, so that the execution end extends into the accommodating channel through the opening; a breaking claw disposed in the accommodating channel, the breaking claw comprising a body portion and at least two elastic arms connected with the body portion, the body portion being connected between the execution end and the elastic arms, and each elastic arm being provided with a clamping portion at an end opposite to the body portion; wherein, when the breaking claw is driven by the execution end to move in the axial direction towards the direction of being retracted into the connecting ring, the clamping portions can be brought close to each other and clamp the sleeve ring under the extrusion of the connecting ring, and the sleeve ring is separated from the rivet shank.

2. The rivet breaking structure according to claim 1, wherein: the connecting ring comprises a first ring body and a second ring body, and in the axial direction, the first ring body is connected between the second ring body and the transmission front shell, and is detachably connected with the second ring body.

3. The rivet break structure according to claim 2, characterized by the body portion is detachably connected with the execution end, and the first ring body is detachably connected with the transmission front shell.

4. The rivet break structure according to claim 2, characterized by a space is present between the part of the breaking claw located in the first ring body and the inner side wall of the first ring body.

5. The rivet break structure according to claim 2, characterized by the second ring body has a tapered hole section and a straight hole section connected therewith; when the breaking claw is driven by the execution end to move in the axial direction towards the direction of being retracted into the connecting ring, the clamping portions first cooperate with the tapered hole section.

6. The rivet break structure according to claim 5, characterized by each elastic arm has a connecting section connected between the clamping portion and the body portion, and in the direction from the body portion to the clamping portion, the outer diameter of the connecting section has a trend of increasing.

7. The rivet break structure according to claim 1, characterized by a clamping channel is formed between the clamping portions, each clamping portion is provided with a blade at an end thereof facing the clamping channel and opposite to the body portion, each clamping portion has an abutting end face opposite to the body portion, and the plane where the blade is located and the abutting end face have a blade angle α, and satisfy 20°≤α≤70°.

8. The rivet break structure according to claim 1, characterized by, The rivet breaking structure further comprises: an adapter detachably connected between the execution end and the body portion.

9. The rivet breakaway structure of claim 1, wherein the body portion and the elastic arms of the breaking claw are of an integral structure and are made of a metal material.

10. The rivet break structure according to claim 1, characterized by, when the breaking claw is completely retracted into the connecting ring and the clamping portions are brought close to the closest position, the diameter of the clamping channel formed by the clamping portions is greater than or equal to the outer diameter of the rivet shank.

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