Riveting piece and riveting auxiliary tool for connecting and fixing fender

Abstract

The invention relates to the technical field of fender connecting pieces, in particular to a riveting piece for connecting and fixing fenders and a riveting assistive device.The riveting piece for connecting and fixing the fenders comprises a nail part, the nail part is provided with a tail body, and a limiting groove set is formed in the tail body; the protection part is provided with a breakage body, and when the protection part is connected with the tail body, the breakage body can enter the limiting groove set; the limiting groove group at least comprises two sub-grooves, the number of the breakage bodies corresponds to the number of the sub-grooves, and the lengths of the sub-grooves in the limiting groove group are different; the breakage body can prevent the nail part from rotating relative to the protection part, and when the breakage body is damaged, the nail part relieves rotation limitation. Through the arrangement of the breakage body and the limiting groove set, torsion borne by the nail part is transmitted to the breakage body through the limiting groove set, and when the torsion is larger than the maximum force capable of being borne by the breakage body, the breakage body is damaged, so that the nail part can rotate by a certain angle, the torsion borne by the nail part is reduced, and the problem that the nail part is mechanically damaged is solved.

Description

Technical Field

[0001] The invention relates to the technical field of fender connecting parts, in particular to a rivet part and a riveting auxiliary tool for connecting and fixing fenders. Background Art

[0002] The vehicle fender is a part of the car body, mainly located above the wheels. It can prevent mud, stones, rain and other debris from splashing onto the car body and pedestrians, protecting the car body from damage. Generally, the fender is fixed to the car body frame by bolts and nuts, or a clip is riveted on the fender to facilitate the connection to the car body frame.

[0003] When the rivet is fixed to the fender by a rotary riveting machine, the rotary head of the rotary riveting machine is used to press down the rivet head when it rotates, so that the rivet head is heated due to friction. The heated rivet head becomes soft and is more easily deformed by pressure. However, in order to prevent the rivet head from rotating when it contacts the rotating head, the rivet needs to be fixed. The contact between the fixed rivet and the rotating rotating head brings a large torque to the rivet, which will cause mechanical damage to the rivet during riveting and affect its service life, making the connection of the fender unreliable. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the riveted parts are mechanically damaged due to the torsion force.

[0005] The above technical problem is solved by the following technical solution: The present invention provides a rivet for connecting and fixing a fender, which includes a nail portion, which is provided with a tail body, and a limiting groove group is provided on the tail body; The protection part is provided with a damaged body, and when the protection part is connected to the tail body, the damaged body can enter the limiting groove group; The limiting groove group includes at least two sub-grooves, the number of the damaged bodies corresponds to the number of sub-grooves, and the lengths of the multiple sub-grooves in the limiting groove group are different; the damaged body can limit the nail part from rotating relative to the protective part, and when the damaged body is damaged, the nail part releases the rotation restriction.

[0006] In a preferred embodiment of the rivet for connecting and fixing fenders of the present invention: the tail body includes a tail pillar and a tail plate connected to the tail pillar; The limit groove group is arranged on the tail plate; The protection portion has two ends, namely a proximal end and a distal end, and the damaged body is arranged at the proximal end.

[0007] In a preferred embodiment of the rivet for connecting and fixing fenders of the present invention: the tail body includes a tail pillar and a tail plate connected to the tail pillar; The limiting groove group has at least one sub-groove with a radial side wall of a tail column; The protection part comprises a sleeve body, and the sleeve body can be sleeved on the outside of the tail column. At least one of the broken bodies is arranged on the radial inner wall of the sleeve body.

[0008] In a preferred embodiment of the rivet for connecting and fixing the fender of the present invention: the tail body includes a tail post; The limiting groove group is formed on the radial side wall of the tail column, and a through groove penetrating the limiting groove group and extending to the end of the tail column is also formed on the radial side wall of the tail column; The protection part comprises a sleeve body, the sleeve body can be sleeved on the outside of the tail column, and the damage body is arranged on the radial inner wall of the sleeve body.

[0009] In a preferred embodiment of the rivet for connecting and fixing a fender panel of the present invention: a positioning opening is provided on the protection portion.

[0010] A riveting aid is used to assist the above-mentioned rivet parts for fender connection and fixation; it includes a positioning seat; a locking part, including a locking bolt installed on the positioning seat and able to move, and a first elastic part connected to the locking bolt; when the protective part is installed on the positioning seat, the first elastic part can push the locking bolt into the positioning port.

[0011] In a preferred embodiment of the riveting auxiliary tool of the present invention, it also includes a torque sharing part; which includes: An inner frame and an arc column, which are arranged inside the positioning seat; A second elastic portion, which is sleeved on the outside of the arc column; The locking bolt passes through the inner frame, and the arc column passes through the locking bolt. When the locking bolt rotates, it can press the second elastic part.

[0012] In a preferred embodiment of the riveting aid of the present invention: a deviating side is further provided on the inner frame, a third elastic portion is sleeved on corresponding positions of the arc column and the deviating side, and the locking bolt is located between the second elastic portion and the third elastic portion.

[0013] In a preferred embodiment of the riveting auxiliary tool of the present invention: the locking bolt includes an insert body, which can be inserted into the positioning port; an anti-separation body, which is connected to the insert body, and the anti-separation body passes through the inner frame; a buckle body, which is connected to the anti-separation body, and the arc column passes through the buckle body.

[0014] In a preferred embodiment of the riveting auxiliary tool described in the present invention: the positioning seat includes a fixing portion; a convex column, which is arranged on the fixing portion; a central portion, which is installed on the fixing portion, and the inner frame and the arc column are both installed on the central portion; a receiving portion, which is installed on the fixing portion; the convex column passes through the central portion and the receiving portion.

[0015] The beneficial effect of the present invention is that by setting a broken body and a limiting groove group, the torque exerted on the nail is transmitted to the broken body through the limiting groove group. When the torque is greater than the maximum force that the broken body can withstand, the broken body will be destroyed, so that the nail can rotate at a certain angle, thereby reducing the torque exerted on the nail and avoiding the problem of mechanical damage to the nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention. Among them: Figure 1 The overall structural diagram of the riveted part is shown; Figure 2 A schematic diagram showing the structure of the nail part and the protection part is shown; Figure 3 A schematic diagram of a first embodiment of a limiting groove group and a damaged body is shown; Figure 4 A schematic diagram of a second embodiment of the limiting groove group and the damaged body is shown; Figure 5 A schematic diagram of a third embodiment of the limiting groove group and the damaged body is shown; Figure 6 A schematic diagram showing the assembly state of the riveted parts is shown; Figure 7 The schematic diagram of the overall structure of the riveting auxiliary tool and the riveting parts is shown; Figure 8 A schematic diagram of the internal structure of the riveting auxiliary tool is shown; Fig. 9 A schematic diagram showing the structure of the torque sharing part and the locking part is shown; Fig.10 A schematic diagram showing the specific structure of the torque sharing part is shown; Fig.11 Shows Fig.10 Enlarged view of point A in the middle; Fig.12 A specific structural schematic diagram of the locking part is shown.

[0017] 100, nail part; 101, tail body; 1011, tail column; 1012, tail plate; 102, limit groove group; 1021, sub-groove; 21a, first sub-groove; 21b, second sub-groove; 21c, third sub-groove; 1022, through groove; 1023, starting end; 1024, end end; 103, rivet head; 104, abutment body; 200, protection part; 201, damage body; 202, near end; 203, far end; 204, sleeve body; 205, positioning port; 300, positioning Seat; 301, fixing part; 302, convex column; 303, middle part; 304, receiving part; 305, recessed platform; 400, locking part; 401, locking bolt; 4011, insert body; 4012, anti-separation body; 4013, buckle body; 402, first elastic part; 500, torque sharing part; 501, inner frame; 5011, deviation side; 502, arc column; 503, second elastic part; 504, third elastic part; 505, rotating body; 506, extension body; L, deviation gap. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with specific implementation methods and drawings.

[0019] The terms used in the present invention are those general terms currently widely used in the art in consideration of the functions of the present invention, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as a general description based on the meaning of the terms and the present invention.

[0020] Reference Figure 1 and Figure 2 The present embodiment provides a rivet for connecting and fixing a fender, including a nail portion 100, the nail portion 100 including a rivet head 103, and an abutment body 104 connected to the rivet head 103. When riveting is performed, a hole through which the rivet head 103 can pass needs to be opened on the workpiece. When the rivet head 103 passes through the hole on the workpiece, the abutment body 104 and the workpiece can fit together. In this embodiment, the nail portion 100 is provided with a tail body 101, and a limiting groove group 102 is provided on the tail body 101. The number of the limiting groove group 102 on the tail body 101 can be one or more.

[0021] This rivet also includes a protection part 200. The purpose of the protection part 200 is to protect the nail part 100. The protection part 200 is provided with a damaged body 201. When the protection part 200 is connected to the tail body 101, the damaged body 201 can enter the limiting groove group 102. When riveting, the protection part 200 and the tail body 101 must be connected first, so that the damaged body 201 enters the limiting groove group 102, and then the protection part 200 is fixed to limit the rotation of the protection part 200. When the rivet head 103 is processed by a rotary riveting machine, the rotary head of the rotary riveting machine rotates and presses down, which can heat the rivet head 103 through the rotating friction force to make the rivet head 103 soft. At the same time, the softened rivet head 103 is compressed and deformed by the downward pressure of the rotating head, so that the rivet head 103 is riveted to the workpiece.

[0022] The limiting groove group 102 includes at least two sub-grooves 1021, the number of the damaged bodies 201 corresponds to the number of the sub-grooves 1021, and the lengths of the multiple sub-grooves 1021 in the limiting groove group 102 are different; the damaged body 201 can limit the nail part 100 from rotating relative to the protective part 200. When the damaged body 201 is damaged, the nail part 100 is released from the rotation restriction. In this embodiment, the number of sub-grooves 1021 in each limiting groove group 102 is three, and the number of damaged bodies 201 is also three. Before riveting, the protection part 200 is sleeved on the tail body 101. After the sleeve is completed, the three damaged bodies 201 extend to the inside of the three sub-grooves 1021 respectively. When the rotating head of the rotary riveting machine and the rivet head 103 come into contact, due to the limitation of the damaged body 201, the entire nail part 100 cannot rotate, so that friction is generated between the rotating rotating head and the rivet head 103, and the heat generated by the friction heats the rivet head 103. In addition, the downward pressure of the rotating head can compress the rivet head 103 to cause deformation.

[0023] During the contact between the rotating head and the rivet head 103, the rotation of the rotating head will bring torque to the non-rotating rivet head 103. In order to avoid mechanical damage to the nail part 100 caused by excessive torque, the torque exerted on the nail part 100 is transmitted to the damaged body 201 through the limiting groove group 102. When the torque is greater than the maximum force that the damaged body 201 can withstand, the damaged body 201 will be destroyed, allowing the nail part 100 to rotate at a certain angle, thereby reducing the torque exerted on the nail part 100 and avoiding the problem of mechanical damage to the nail part 100.

[0024] In this embodiment, the number of the limiting groove groups 102 is six, and the six limiting groove groups 102 are distributed in a circle with the tail body 101 as the axis. The three sub-grooves 1021 of each limiting groove group 102 are respectively the first sub-groove 21a, the second sub-groove 21b and the third sub-groove 21c. The sub-groove 1021 close to the axis of the tail body 101 is the shortest sub-groove 21a, and its length is equivalent to the width of the damaged body 201. When the corresponding damaged body 201 enters the first sub-groove 21a, it can limit the rotation of the nail part 100, so that the nail part 100 cannot rotate relative to the protective part 200. In addition, the second sub-groove 21b and the third sub-groove 21c are both arc grooves and are in a concentric circle relationship. Correspondingly, the six groups of damaged bodies 201 corresponding to the six limiting groove groups 102 are also distributed in a circle on the protective part 200, and the three damaged bodies 201 in each group of damaged bodies 201 are arranged in a straight line.

[0025] Therefore, when the damaged body 201 enters the sub-groove 1021, it is located at the starting end 1023 of the sub-groove 1021. The rotary riveting machine processes the rivet head 103. The damaged body 201 in the first sub-groove 21a can play a limiting role to prevent the rivet head 103 from rotating. Friction is generated between the rotation of the rotary head of the rotary riveting machine and the rivet head 103, so that the rivet head 103 is heated. When the torsion force on the entire nail part 100 is too large, the nail part 100 transmits the force to the damaged body 201 through the inner groove wall of the sub-groove 1021. The damaged body 201 in the first sub-groove 21a is destroyed, and then the nail part 100 can move relative to The protection part 200 rotates to release the torque received by the rivet. At this time, the remaining damaged body 201 moves toward the terminal end 1024 inside the second sub-groove 21b and the third sub-groove 21c until the damaged body 201 first reaches the terminal end 1024 of the second sub-groove 21b, thereby limiting the rotation of the nail part 100 again. Through this processing method, when the torque is small, the rotation of the nail part 100 can be limited, so that friction can be generated between the rotating head of the rotary riveting machine and the rivet head 103 to heat the rivet head 103. When the torque is too large, the entire nail part 100 can rotate at a certain angle to release the torque, thereby avoiding mechanical damage to the nail part 100.

[0026] Please refer to Figure 3 A positioning hole 205 is provided on the protection part 200, which is connected to the positioning hole 205 through an external auxiliary structure, so as to limit the rotation of the protection part 200 and avoid the problem of synchronous rotation of the nail part 100 and the protection part 200 when the rotating head of the rotary riveting machine contacts the nail part 100.

[0027] Please refer to Figure 2 and Figure 3As a first embodiment, the tail body 101 includes a tail column 1011 and a tail plate 1012 connected to the tail column 1011; the limiting groove group 102 is opened on the tail plate 1012; the protection part 200 has two ends, namely a proximal end 202 and a distal end 203, and the damaged body 201 is arranged at the proximal end 202.

[0028] In this embodiment, the tail column 1011 and the tail plate 1012 are in a concentric circle relationship and are arranged at the end of the nail portion 100 away from the rivet head 103. It is best to be integrally formed with the nail portion 100. The limiting groove group 102 is opened on the side of the tail plate 1012 facing the tail column 1011. When the protection portion 200 is installed on the tail body 101, the proximal end 202 of the protection portion 200 and the tail plate 1012 are fitted, and the damaged body 201 on the proximal end 202 enters the corresponding limiting groove group 102. When the nail portion 100 contacts the rotating head of the rotary riveting machine, the damaged body 201 inside the limiting groove group 102 plays a role in limiting the nail portion 100.

[0029] Please refer to Figure 4 As a second embodiment, the tail body 101 includes a tail column 1011 and a tail plate 1012 connected to the tail column 1011; the limiting groove group 102 has at least one sub-groove 1021 opened on the radial side wall of the tail column 1011; the protection part 200 includes a sleeve body 204, the sleeve body 204 can be sleeved on the outside of the tail column 1011, and at least one damage body 201 is arranged on the radial inner wall of the sleeve body 204.

[0030] In this embodiment, the sleeve body 204 is a tubular structure, which can be sleeved on the outside of the tail column 1011, and its inner diameter is adapted to the column diameter of the tail column 1011. The number of sub-grooves 1021 in each limiting groove group 102 is three. Among the three sub-grooves 1021, the first sub-groove 21a is directly opened on the radial side wall of the tail column 1011, and the first sub-groove 21a penetrates to the end of the tail column 1011 away from the tail plate 1012. At the same time, the number of the limiting groove group 102 is six. When the sleeve body is When 204 is sleeved on the outside of the tail column 1011, the damaged body 201 can be more easily aligned with the sub-groove 1021. It is only necessary to insert the damaged body 201 on the radial inner wall of the sleeve body 204 into the inside of the first sub-groove 21a, and then sleeve the sleeve body 204 on the outside of the tail column 1011, so that the damaged body 201 and the limiting groove group 102 can correspond one by one. In this embodiment, the connection efficiency of the sleeve body 204 and the tail column 1011 can be improved, thereby improving the production efficiency.

[0031] Please refer to Figure 5As a third embodiment, the tail body 101 includes a tail column 1011; the limiting groove group 102 is opened on the radial side wall of the tail column 1011, and the radial side wall of the tail column 1011 is also provided with a through groove 1022 that penetrates the limiting groove group 102 and extends to the end of the tail column 1011; the protection part 200 includes a sleeve body 204, the sleeve body 204 can be sleeved on the outside of the tail column 1011, and the damaged body 201 is arranged on the radial inner wall of the sleeve body 204.

[0032] In this embodiment, there is no need to set up the tail plate 1012. All the limiting groove groups 102 are opened on the tail column 1011. All the damaged bodies 201 are integrally formed on the radial inner wall of the sleeve body 204. One end of the sleeve body 204 is in a closed state. When the sleeve body 204 is sleeved on the outer side of the tail column 1011, the positions of the damaged body 201 and the through groove 1022 are correspondingly sleeved. When the tail column 1011 contacts the end of the sleeve body 204 in a closed state, the position of the damaged body 201 corresponds to the position of the sub-groove 1021.

[0033] Meanwhile, the number of the sub-grooves 1021 is one less than the number of the damaged bodies 201 , and the through grooves 1022 replace the first sub-grooves 21 a in the above embodiment to limit the rotation of the nail portion 100 in the initial state.

[0034] Please refer to Figures 7 to 9 This embodiment also proposes a riveting auxiliary tool for assisting the above-mentioned fender connection and fixing riveting parts; including a positioning seat 300; during processing, the positioning seat 300 can be installed on the workbench of the rotary riveting machine.

[0035] The riveting aid includes a locking portion 400, which includes a locking bolt 401 that is movably installed on the positioning seat 300, and a first elastic portion 402 connected to the locking bolt 401. When the protecting portion 200 is installed on the positioning seat 300, the first elastic portion 402 can push the locking bolt 401 into the interior of the positioning port 205. In this embodiment, the number of the positioning ports 205 is two, the number of the locking portions 400 is two, and the number of the first elastic portions 402 is also two. The elastic force of the first elastic portion 402 can keep the locking bolt 401 inserted into the positioning port 205. When the locking bolt 401 is inserted into the interior of the positioning port 205, it can limit the protecting portion 200, so that the rotation of the protecting portion 200 is restricted, thereby restricting the rotation of the nail portion 100. Therefore, the riveting aid plays an auxiliary role.

[0036] In another embodiment, the riveting aid also includes a torque sharing part 500; it includes an inner frame 501 and an arc column 502, which are arranged inside the positioning seat 300; a second elastic part 503, which is sleeved on the outside of the arc column 502; the locking bolt 401 passes through the inner frame 501, and the arc column 502 passes through the locking bolt 401, and the locking bolt 401 can press the second elastic part 503 when it rotates. By setting the torque sharing part 500, when the rotating head of the rotary riveting machine contacts the rivet head 103, the entire nail part 100 can rotate at a certain angle as the torque increases, thereby helping the nail part 100 to share the torque.

[0037] In this embodiment, the inner frame 501 is used to stabilize the locking bolt 401, the arc column 502 and the inner frame 501 have a common center with the positioning seat 300, and an inclined surface is provided at the positioning opening 205 of the protection portion 200. When the riveted part is positioned on the fixing seat, the locking bolt 401 will contact the inclined surface of the protection portion 200, move and press the first elastic portion 402. When the position of the locking bolt 401 corresponds to the position of the positioning opening 205, the elastic force of the first elastic portion 402 can push the locking bolt 401, and the locking bolt 401 partially enters the interior of the positioning opening 205.

[0038] like Figures 10 to 12 When the rotating head of the rotary riveting machine contacts the riveted part, the friction force will bring torque to the riveted part. For example, if the rotating head rotates clockwise, the riveted part will have clockwise torque, and the protective part 200 in the riveted part will tend to rotate clockwise. At this time, the protective part 200 drives the locking bolt 401 to rotate synchronously, so that the locking bolt 401 rotates clockwise along the arc column 502 to press the second elastic part 503. Through the rotation of the locking bolt 401 and the protective part 200, the nail part 100 can obtain a rotation angle that increases with the increase of torque, thereby avoiding the problem of mechanical damage caused by excessive torque due to the inability of the nail part 100 to rotate.

[0039] As the rotation angle of the locking bolt 401 increases, the elastic force generated by pressing the second elastic part 503 becomes larger and larger, and the angle at which the locking bolt 401 can rotate becomes smaller and smaller. When the torque is too large and cannot drive the locking bolt 401 to continue pressing the second elastic part 503, the damaged body 201 on the protective part 200 is damaged, so that the nail part 100 obtains a certain rotation angle relative to the protective part 200 to continue to release the torque.

[0040] In another embodiment, the inner frame 501 is further provided with a deviating side 5011 , and the third elastic portion 504 is sleeved at the corresponding position of the arc column 502 and the deviating side 5011 , and the locking bolt 401 is located between the second elastic portion 503 and the third elastic portion 504 .

[0041] After the processing is completed, when the protective part 200 needs to be removed from the positioning seat 300, it only needs to be rotated counterclockwise. The protective part 200 drives the locking bolt 401 to rotate counterclockwise along the arc column 502. The deviation side 5011 can push the locking bolt 401, so that the locking bolt 401 moves away from the protective part 200 and disengages from the inner side of the positioning port 205.

[0042] Among them, the deviation side 5011 on the inner frame 501 deviates away from the center of the inner frame 501, and is used to push the locking bolt 401 to move away from the protection part 200. In the absence of external force, the second elastic part 503 and the third elastic part 504 are used to maintain the initial position of the locking bolt 401.

[0043] The locking bolt 401 includes an insert body 4011, which can be inserted into the positioning port 205; an anti-separation body 4012, which is connected to the insert body 4011, and the anti-separation body 4012 passes through the inner frame 501; a buckle body 4013, which is connected to the anti-separation body 4012, and the arc column 502 passes through the buckle body 4013. The anti-separation body 4012 is a cylinder with reduced diameters at both ends. The diameters of the two ends of the anti-separation body 4012 are larger than the diameter of the middle area. An arc groove is opened on the inner frame 501. In order to prevent the entire locking bolt 401 from rotating, a rotating body 505 is installed inside the arc groove. The rotating body 505 has two surfaces that fit the inner frame 501. The anti-separation body 4012 passes through the rotating body 505, and the anti-separation body 4012 can slide relative to the rotating body 505. The rotating body 505 can prevent the anti-separation body 4012 from sliding relative to the inner frame 501. Horizontal rotation occurs, and an extension body 506 is also provided on the inner frame 501, and the deviation side 5011 is a side surface of the extension body 506. When the insert body 4011 is inserted into the inner side of the positioning port 205, a deviation gap L will be generated between the plane of the end of the anti-separation body 4012 and the arc surface of the radial outer wall of the protection part 200. After the processing is completed, when the protection part 200 needs to be removed, the protection part 200 is rotated counterclockwise, and the protection part 200 drives the locking bolt 401 to rotate counterclockwise as a whole. At this time, the buckle body 4013 presses the third elastic part 504. As the locking bolt 401 rotates, the extension body 506 can enter the deviation gap L, so that the anti-separation body 4012 contacts the deviation side 5011. Finally, under the contact of the deviation side 5011, the insert body 4011 is detached from the inside of the positioning port 205, and the unlocking of the protection part 200 is completed.

[0044] The buckle body 4013 is provided with a buckle groove, the width of which matches the diameter of the arc column 502 , and the length of which is greater than the diameter of the arc column 502 .

[0045] The positioning seat 300 includes a fixing portion 301; a convex column 302, which is arranged on the fixing portion 301; a central portion 303, which is installed on the fixing portion 301, and the inner frame 501 and the arc column 502 are both installed on the central portion 303; a receiving portion 304, which is installed on the fixing portion 301; the convex column 302 passes through the central portion 303 and the receiving portion 304.

[0046] A reserved hole is provided on the fixing part 301 to facilitate fixing the fixing part 301 on the processing workbench of the rotary riveting machine. The middle part 303 and the receiving part 304 are positioned on the fixing part 301 through the convex column 302, so that the middle part 303 and the receiving part 304 cannot rotate relative to the fixing part 301. In addition, a concave platform 305 is provided on the top of the receiving part 304. When the rivet is placed on the concave platform 305, the abutment body 104 or the tail plate 1012 of the rivet can enter the interior of the concave platform 305, which plays a supporting and limiting role for the rivet. Figure 8 , showing the state where the tail plate 1012 of the riveted part enters the concave platform 305.

[0047] By providing a detachable middle part 303 and installing both the locking part 400 and the torque sharing part 500 on the middle part 303 , when damage occurs, the repair work can be completed by replacing the middle part 303 .

[0048] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A rivet for connecting and fixing a fender, characterized in that: include, A nail portion (100) is provided with a tail body (101), wherein a limiting groove group (102) is provided on the tail body (101); A protection part (200) provided with a damage body (201); when the protection part (200) is connected to the tail body (101), the damage body (201) can enter the limiting groove group (102); The limiting groove group (102) comprises at least two sub-grooves (1021); the number of the damaged bodies (201) corresponds to the number of the sub-grooves (1021); the plurality of sub-grooves (1021) in the limiting groove group (102) have different lengths; the damaged bodies (201) can limit the nail portion (100) from rotating relative to the protection portion (200); when the damaged bodies (201) are damaged, the nail portion (100) releases the rotation restriction.

2. The rivet for connecting and fixing a fender according to claim 1, characterized in that: The tail body (101) comprises a tail column (1011) and a tail plate (1012) connected to the tail column (1011); The limiting groove group (102) is provided on the tail plate (1012); The protection portion (200) has two ends, namely a proximal end (202) and a distal end (203), and the damaged body (201) is arranged at the proximal end (202).

3. The rivet for connecting and fixing a fender according to claim 1, characterized in that: The tail body (101) comprises a tail column (1011) and a tail plate (1012) connected to the tail column (1011); The limiting groove group (102) has at least one sub-groove (1021) provided with a radial side wall of the tail column (1011); The protection portion (200) comprises a sleeve body (204), the sleeve body (204) being capable of being sleeved on the outside of the tail column (1011), and at least one of the damaged bodies (201) being arranged on a radial inner wall of the sleeve body (204).

4. The rivet for connecting and fixing a fender according to claim 1, characterized in that: The tail body (101) comprises a tail column (1011); The limiting groove group (102) is formed on the radial side wall of the tail column (1011), and a through groove (1022) penetrating the limiting groove group (102) and extending to the end of the tail column (1011) is also formed on the radial side wall of the tail column (1011); The protection portion (200) comprises a sleeve body (204), the sleeve body (204) being capable of being sleeved on the outside of the tail column (1011), and the damaged body (201) being arranged on a radial inner wall of the sleeve body (204).

5. The rivet for connecting and fixing a fender according to any one of claims 1 to 4, characterized in that: The protection portion (200) is provided with a positioning opening (205).

6. A riveting auxiliary tool, characterized in that: A rivet for assisting the fender connection and fixing as described in claim 5; include, Positioning seat (300); The locking portion (400) comprises a locking bolt (401) movably mounted on the positioning seat (300), and a first elastic portion (402) connected to the locking bolt (401); When the protection portion (200) is installed on the positioning seat (300), the first elastic portion (402) can push the locking bolt (401) into the interior of the positioning opening (205).

7. The riveting aid according to claim 6, characterized in that: It also includes a torque sharing portion (500); which includes, An inner frame (501) and an arc column (502), which are arranged inside the positioning seat (300); A second elastic portion (503) sleeved on the outside of the arc column (502); The locking bolt (401) penetrates the inner frame (501), the arc column (502) penetrates the locking bolt (401), and the locking bolt (401) is capable of pressing the second elastic part (503) when rotating.

8. The riveting aid according to claim 7, characterized in that: The inner frame (501) is also provided with a deviating side (5011), the arc column (502) and the corresponding position of the deviating side (5011) are sleeved with a third elastic part (504), and the locking bolt (401) is located between the second elastic part (503) and the third elastic part (504).

9. The riveting aid according to claim 7 or 8, characterized in that: The locking bolt (401) comprises: An inserting body (4011), which can be inserted into the positioning opening (205); An anti-detachment body (4012) connected to the insert body (4011), the anti-detachment body (4012) penetrating the inner frame (501); A buckle body (4013) is connected to the anti-separation body (4012), and the arc column (502) passes through the buckle body (4013).

10. The riveting aid according to claim 9, characterized in that: The positioning seat (300) comprises: A fixing portion (301); A convex column (302) provided on the fixing portion (301); A central portion (303) mounted on the fixed portion (301), and the inner frame (501) and the arc column (502) are both mounted on the central portion (303); A receiving portion (304) mounted on the fixing portion (301); The convex column (302) passes through the middle portion (303) and the receiving portion (304).

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