Door guard plate quick mounting buckle and mounting and dismounting method thereof

Abstract

The application discloses a door guard plate quick-mounting buckle and a mounting and dismounting method thereof, which comprises an arc surface rotating shaft body and a fixed sleeve shell body, the arc surface rotating shaft body comprises a rectangular disc, a middle shaft, a disc, a limiting stopper, an arc surface boss, a hollow shaft, a stopper connection, a wedge block inverted hook and an axial limiting end head; the fixed sleeve shell body comprises a transmission shaft, a circular ring body, a sealing ring, a rectangular gap, a cuboid shell body, a shell chamfered portion and a T-shaped shaft; the arc surface boss of the arc surface rotating shaft body can rotate under the action of entering the rectangular hole of the sheet metal, the fixed sleeve shell body has the rectangular gap, and the arc surface boss protrudes in the rectangular gap, contacts the sheet metal hole and enters the hole. The application guarantees the safety of the door guard plate and meets the performance requirements of saving working hours during assembly.

Description

TECHNICAL FIELD

[0001] The application discloses a quick-mounting buckle and a mounting and dismounting method thereof and belongs to the field of vehicle assembly tools. BACKGROUND

[0002] In today's requirements for door guard side crash safety and installation rhythm, higher requirements are put forward for the quick mounting and safety performance of front and rear door guard structures. In the prior art, when the inner and outer door guards of a vehicle are assembled with the door sheet metal, a bird beak type plastic buckle and a metal screw are usually combined to be connected, and the inner and outer door guard assemblies are connected with the door sheet metal by using the bird beak type plastic buckle and the metal screw. The working principle of the plastic buckle is usually that the buckle head installed on the door inner guard is deformed, is squeezed into the mounting hole of the door sheet metal, and then the buckle head is restored to be clamped. Due to installation reasons, the interference size of the buckle head cannot be too large or needs a large deformability, so that the buckle has poor tensile resistance, the pull-out force is small, and the buckle is easy to be loosened, so the metal screw is needed to be combined to connect, to ensure that the door guard is not pulled out of the sheet metal. However, it takes 10 seconds to tighten a screw by using an electric torque wrench, so the assembly efficiency is low, and a door guard quick-mounting buckle structure needs to be developed to solve the above technical problems. SUMMARY

[0003] In view of the technical problems in the prior art, the application provides a door guard quick-mounting buckle and a mounting and dismounting method thereof, which can not only ensure that the pull-out force is equivalent to that of a metal screw and far greater than that of a bird beak type plastic buckle, but also can be directly punched into the sheet metal together with the bird beak type buckle, reduces the rhythm of tightening by using a torque wrench by an assembly worker, and reduces the physical labor of an operator, so that the safety of the door guard is ensured and the assembly performance requirement of saving time is considered.

[0004] The application discloses a door guard plate quick-mounting buckle, which comprises an arc surface rotating shaft body and a fixed sleeve shell, the arc surface rotating shaft body comprises a hollow shaft, one end of the hollow shaft is provided with a chuck assembly for connecting a buckle mounting seat and an elastic rotation reset assembly capable of driving the hollow shaft to rotate and reset, the other end of the hollow shaft is provided with two block connections, each block connection is in the shape of a 1 / 4 circular ring, the two block connections are arranged in a 180° mirror image mode with respect to the central axis of the arc surface rotating shaft body, one axial limiting end is connected to each block connection, each axial limiting end is arranged perpendicularly to the hollow shaft, the two axial limiting ends are arranged in parallel and at intervals, a wedge block barb is arranged on each axial limiting end, an arc surface boss is arranged on the outer circumferential surface of the hollow shaft, the arc surface boss is used for cooperating with a rectangular metal sheet hole of a door inner plate metal sheet to drive the arc surface rotating shaft body to rotate around the central axis thereof, and the cross section of the central hole of the hollow shaft is in the shape of a polygon; the fixed sleeve shell comprises a circular ring body used for cooperating with the hollow shaft, a cuboid shell which can be elastically deformed and is correspondingly arranged on the circular ring body, a rectangular notch is arranged on the circumferential surface of the cuboid shell and used for avoiding the arc surface boss, a hole is arranged on the end surface of the cuboid shell and used for avoiding the axial limiting end, the cuboid shell is used for axially limiting the arc surface rotating shaft body in cooperation with the wedge block barb, a T-shaped shaft which is injection molded and can rotate around the central axis thereof is arranged in the cuboid shell, the T-shaped shaft comprises a cylindrical base coaxially arranged with the hollow shaft, a pair of cross beams used for limiting the block connection in cooperation are symmetrically arranged on the circumferential surface of the cylindrical base, each cross beam is fixedly connected to the inner wall of the cuboid shell, a transmission shaft is coaxially arranged on the end surface of the cylindrical base, and the cross section of the transmission shaft is correspondingly arranged with the cross section of the central hole of the hollow shaft.

[0005] In a preferred embodiment of the application, the chuck assembly comprises a rectangular chuck, an intermediate shaft and a disc which are coaxially arranged, one end of the disc is fixedly connected to the hollow shaft, the other end is fixedly connected to the intermediate shaft, the intermediate shaft is fixedly connected to the rectangular chuck, and the diameter of the intermediate shaft corresponds to the diameter of the Ω hole of the buckle mounting seat; the length of the intermediate shaft corresponds to the width of the mounting groove of the buckle mounting seat.

[0006] In a preferred embodiment of the application, a limiting block is arranged on the end surface of the disc and used for limiting the rotating direction of the arc surface rotating shaft body.

[0007] In a preferred embodiment of the present application, the elastic rotation reset assembly comprises a rectangular chuck fixed to the hollow shaft, the rectangular chuck comprises a rectangular frame, elastic arc strips and a beak-shaped pressing block, the rectangular frame is fixed in the buckle mounting seat, the beak-shaped pressing block is coaxially fixed to the intermediate shaft, one end of the elastic arc strip is fixed to the rectangular chuck and the other end is fixed to the beak-shaped pressing block, and the elastic arc strip comprises at least two, and the two elastic arc strips are arranged in rotational symmetry relative to the beak-shaped pressing block.

[0008] In a preferred embodiment of the present application, the end face of the beak-shaped pressing block is provided with a wrench hole in the shape of a plum blossom, or / and the end face of each axial limiting end head is provided with a wrench hole in the shape of a plum blossom.

[0009] In a preferred embodiment of the present application, the arc convex platform is a slope surface spirally rising along the central axis of the hollow shaft, and the spacing between the end face of the arc convex platform perpendicular to the central axis of the hollow shaft and the end face of the fixed sleeve shell corresponds to the thickness of the door inner panel metal plate.

[0010] In a preferred embodiment of the present application, the arc rotating shaft body and the fixed sleeve shell are both formed of plastic material.

[0011] In a preferred embodiment of the present application, the arc rotating shaft body can rotate by 45° around its own axis under the cooperation of the rectangular metal plate hole and the arc convex platform.

[0012] In a preferred embodiment of the present application, the transmission shaft is a cross shaft, and the central hole of the hollow shaft is a cross hole.

[0013] The present application also discloses a door guard plate mounting and dismounting method, which comprises an inner door guard plate, an outer door guard plate, a door inner panel metal plate and a door guard plate quick mounting buckle, in the mounting process, the buckle mounting seat is mounted on the arc rotating shaft body, the arc rotating shaft body and the fixed sleeve shell are inserted into each other, the whole structure composed of the buckle mounting seat, the arc rotating shaft body and the fixed sleeve shell is inserted into the rectangular metal plate hole of the door inner panel metal plate, the fixed sleeve shell is limited by the rectangular metal plate hole, the arc rotating shaft body rotates under the cooperation of the arc convex platform and the rectangular metal plate hole, when the rectangular metal plate hole passes the critical point of the arc convex platform, the rectangular metal plate hole is hung by the barb structure on the arc convex platform to form a clamping connection due to the rebound force generated by the rectangular chuck of the arc rotating shaft body, and the rectangular metal plate hole is reset by the arc rotating shaft body; in the dismounting process, the arc rotating shaft body is rotated by 45° through the cooperation of the plum blossom wrench hole on the end face of the beak-shaped pressing block or the plum blossom wrench hole on the end face of the axial limiting end head, and the dismounting is completed.

[0014] The beneficial effects of the present application are: the present application can not only ensure that the pulling force is equivalent to that of a metal screw and far greater than that of a bird beak-shaped plastic buckle, but also can be directly shot into sheet metal together with the bird beak-shaped buckle, thereby reducing the rhythm of tightening by assembly personnel using a torque wrench, reducing the physical labor of the operator, thereby ensuring the safety of the door guard plate and taking into account the assembly performance requirements of saving time; further, the door guard plate quick mounting buckle and the mounting structure thereof are adopted, the overall connection of the vehicle door is more firm, the door guard plate is prevented from being pulled out during a collision, the impact force of the door guard plate on the human body is avoided, and the injury is reduced. At the same time, the quick mounting buckle does not need to be tightened by using an electric torque wrench, but is directly shot into the sheet metal of the vehicle door together with the ordinary bird beak-shaped buckle to realize the function of quick mounting, thereby reducing the time rhythm, reducing the physical labor of the operator, and improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic view of a door guard plate quick mounting buckle of the present application;

[0016] Figure 2 is a sectional view of a door guard plate quick mounting buckle of the present application;

[0017] Figure 3 is a sectional view of a door guard plate quick mounting buckle of the present application;

[0018] Figure 4 is an exploded view of a door guard plate quick mounting buckle of the present application;

[0019] Figure 5 is a fixed sleeve housing schematic view of a door guard plate quick mounting buckle of the present application;

[0020] Figure 6 is a front view of a door guard plate quick mounting buckle of the present application;

[0021] Figure 7 is an A-A sectional view of Figure 6 ;

[0022] Figure 8 is an assembly exploded view of a door guard plate quick mounting buckle of the present application;

[0023] Figure 9 is a schematic view of an elastic reset unit of a door guard plate quick mounting buckle of the present application;

[0024] Figure 10 is a schematic view of an elastic reset unit of a door guard plate quick mounting buckle of the present application;

[0025] Figure 11 is a schematic view of a buckle mounting seat of a door guard plate quick mounting buckle of the present application;

[0026] Figure 12 is a side view of a door guard plate quick mounting buckle of the present application;

[0027] Figure 13 is a C-C cross-sectional view of Figure 12 ;

[0028] Figure 14 is an E-E cross-sectional view of Figure 12 ;

[0029] Figure 15 is an F-F cross-sectional view of Figure 12 ;

[0030] Figure 16 is a schematic diagram of the assembly process of the quick-mounting buckle of the door guard plate of the present application;

[0031] Figure 17 is an assembly cross-sectional view of the quick-mounting buckle of the door guard plate of the present application;

[0032] Figure 18 is a schematic diagram of the assembly of the quick-mounting buckle of the door guard plate of the present application;

[0033] In the figure: 1 - camshaft body; 2 - fixed casing; 3 - buckle mounting seat; 4 - car door inner plate sheet metal; 5 - outer door guard plate; 6 - inner door guard plate; 7 - L-shaped wrench; 101 - rectangular disc; 102 - intermediate shaft; 103 - disc; 104 - limit stop; 105 - cam boss; 106 - hollow shaft; 107 - stop block connection; 108 - wedge block barb; 109 - axial limit end; 201 - transmission shaft; 202 - circular ring body; 203 - sealing ring; 204 - rectangular notch; 205 - cuboid casing; 206 - casing chamfered portion; 207 - T-shaped shaft; 301 - mounting seat Ω hole outer plate; 302 - mounting seat oval hole inner plate; 303 - mounting seat rectangular groove; 101a - rectangular frame; 101b - elastic cam; 101c - beak-shaped pressing block; 101d - key wrench hole. DETAILED DESCRIPTION

[0034] The technical solutions of the present application (including the preferred technical solutions) will be described in further detail below by means of the accompanying drawings and by listing some optional embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0035] The application discloses a door guard plate quick-mounting buckle, which comprises an arc surface rotating shaft body 1 and a fixed sleeve shell 2; the arc surface rotating shaft body 1 comprises a hollow shaft 106, one end of the hollow shaft 106 is provided with a chuck assembly used for connecting a buckle mounting seat 3 and an elastic rotation reset assembly capable of driving the hollow shaft 106 to rotate and reset, the other end of the hollow shaft 106 is provided with two block connections 107, each block connection 107 is in the shape of a 1 / 4 circular ring, the two block connections 107 are arranged in a 180° mirror image relative to the central axis of the arc surface rotating shaft body 1, one axial limiting end 109 is connected to each block connection 107, each axial limiting end 109 is arranged perpendicularly to the hollow shaft 106, the two axial limiting ends 109 are arranged in parallel and at intervals, a wedge block barb 108 is arranged on each axial limiting end 109, an arc surface boss 105 is arranged on the outer circumferential surface of the hollow shaft 106 and is used for cooperating with a rectangular metal sheet hole of a door inner plate metal sheet 4 to drive the arc surface rotating shaft body 1 to rotate around the central axis thereof, and the cross section of the central hole of the hollow shaft 106 is in the shape of a polygon; the fixed sleeve shell 2 comprises a circular ring body 202 used for cooperating with the hollow shaft 106, a cuboid shell 205 corresponding to the shape of the rectangular metal sheet hole and capable of being elastically deformed is connected to the circular ring body 202, a rectangular notch 204 used for avoiding the arc surface boss 105 is arranged on the circumferential surface of the cuboid shell 205, a hole used for avoiding the axial limiting end 109 is arranged on the end surface of the cuboid shell 205, the cuboid shell 205 cooperates with the wedge block barb 108 to axially limit the arc surface rotating shaft body 1, a T-shaped shaft 207 which is injection molded and can rotate around the central axis thereof is arranged in the cuboid shell 205, the T-shaped shaft 207 comprises a cylindrical base 207c which is coaxially arranged with the hollow shaft 106, a pair of cross beams used for cooperating with the block connection 107 to limit are symmetrically arranged on the circumferential surface of the cylindrical base 207c, each cross beam is fixedly connected to the inner wall of the cuboid shell 205, a transmission shaft 201 which is coaxially arranged with the cylindrical base 207c is arranged on the end surface of the cylindrical base 207c, and the cross section of the transmission shaft 201 corresponds to the cross section of the central hole of the hollow shaft 106.

[0036] Preferably, the chuck assembly comprises a rectangular chuck 101, an intermediate shaft 102 and a disc 103 which are coaxially arranged, one end of the disc 103 is fixedly connected to the hollow shaft 106, the other end is fixedly connected to the intermediate shaft 102, the intermediate shaft 102 is fixedly connected to the rectangular chuck 101, and the diameter of the intermediate shaft 102 corresponds to the diameter of the Ω hole of the buckle mounting seat 3; the length of the intermediate shaft 102 corresponds to the width of the mounting groove of the buckle mounting seat 3.

[0037] Preferably, the end surface of the disc 103 is provided with a limiting block 104 used for limiting the rotating direction of the arc surface rotating shaft body 1.

[0038] Preferably, the elastic rotation reset assembly comprises a rectangular chuck 101 fixedly connected with the hollow shaft 106, the rectangular chuck 101 comprising a rectangular frame 101a, elastic arc strips 101b and a beak-shaped pressing block 101c, the rectangular frame 101a being fixedly connected in the buckle mounting seat 3, the beak-shaped pressing block 101c being coaxially fixedly connected with the intermediate shaft 102, the elastic arc strips 101b being fixedly connected at one end with the rectangular chuck 101 and at the other end with the beak-shaped pressing block 101c, the elastic arc strips 101b comprising at least two, the two elastic arc strips 101b being rotationally symmetrically arranged relative to the beak-shaped pressing block 101c.

[0039] Preferably, the end face of the beak-shaped pressing block 101c is provided with a keyhole wrench hole; or / and the end face of each axial limiting end head 109 is provided with a keyhole wrench hole.

[0040] Preferably, the arc convex platform 105 is a slope surface spirally rising along the central axis of the hollow shaft 106, and the spacing between the end face of the arc convex platform 105 perpendicular to the central axis of the hollow shaft 106 and the end face of the fixed sleeve shell 2 corresponds to the thickness of the door inner panel metal sheet 4.

[0041] Preferably, the arc rotating shaft body 1 and the fixed sleeve shell 2 are both formed of plastic material.

[0042] Preferably, the arc rotating shaft body 1 can rotate by 45° around its own axis under the cooperation of the rectangular metal sheet hole and the arc convex platform 105.

[0043] Preferably, the transmission shaft 201 is a cross shaft, and the central hole of the hollow shaft 106 is a cross hole.

[0044] The application further discloses a door guard plate mounting and dismounting method, which comprises an inner door guard plate 6, an outer door guard plate 5, a door inner panel metal sheet 4 and a door guard plate quick mounting buckle. In the mounting process, the buckle mounting seat 3 is mounted on the arc rotating shaft body 1, the arc rotating shaft body 1 and the fixed sleeve shell 2 are inserted into each other, the whole structure composed of the buckle mounting seat 3, the arc rotating shaft body 1 and the fixed sleeve shell 2 is inserted into the rectangular metal sheet hole of the door inner panel metal sheet 4, the fixed sleeve shell 2 is limited by the rectangular metal sheet hole, the arc rotating shaft body 1 rotates under the cooperation of the arc convex platform 105 and the rectangular metal sheet hole, when the rectangular metal sheet hole passes the critical point of the arc convex platform 105, the arc rotating shaft body 1 reverses and resets due to the rebound force generated by the rectangular chuck 101 of the arc rotating shaft body 1, and the rectangular metal sheet hole is hung by the barb structure on the arc convex platform 105 to form a clamping connection. In the dismounting process, the arc rotating shaft body 1 is rotated by 45° through the cooperation of the keyhole wrench hole provided on the end face of the beak-shaped pressing block 101c or the keyhole wrench hole provided on the end face of the axial limiting end head 109, and the dismounting is completed.

[0045] The application will be further explained in combination with the drawings:

[0046] The door guard plate quick mounting buckle comprises an arc surface rotating shaft body 1 and a fixed sleeve shell 2, wherein the arc surface rotating shaft body 1 comprises a rectangular chuck 101, an intermediate shaft 102, a disc 103, a limiting stopper 104, an arc surface boss 105, a hollow shaft 106, a stopper connecting piece 107, a wedge block reverse hook 108 and an axial limiting end 109; the fixed sleeve shell 2 comprises a transmission shaft 201, a circular ring body 202, a sealing ring 203, a rectangular notch 204, a cuboid shell 205, a shell chamfered portion 206 and a T-shaped shaft 207; the arc surface boss 105 of the arc surface rotating shaft body 1 can rotate in cooperation with the rectangular hole of the inner plate metal plate 4 when entering the rectangular hole of the inner plate metal plate 4, the fixed sleeve shell 2 has the rectangular notch 204, the arc surface boss 105 protrudes in the rectangular notch 204 and contacts and enters the metal plate hole; the rectangular chuck 101 is composed of a rectangular frame 101a, an elastic arc strip 101b, a bird beak type pressing block 101c and a key hole 101d. The elastic arc strip 101b connects the rectangular frame 101a and the bird beak type pressing block 101c at both ends, because the rectangular frame 101a is fixed in the mounting seat rectangular groove 303 of the buckle mounting seat 3 and is fixed, the arc surface rotating shaft body 1 rotates to drive the bird beak type pressing block 101c to rotate, so that the bird beak type pressing block 101c is pressed on the elastic arc strip 101b, and the elastic arc strip 101b generates a free rebound force of plastic material. In addition, the L-shaped key 7 can be inserted into the key hole 101d, the arc surface rotating shaft body 1 is rotated to rotate in the positive direction, so that the height of the arc surface boss 105 is lower than the edge of the metal plate hole, the reverse hook structure is eliminated and the buckle is not connected, the chuck composed of the rectangular chuck 101, the intermediate shaft 102 and the disc 103 is sleeved on the buckle mounting seat 3, wherein the rectangular chuck 101 and the disc 103 are clamped on the mounting seat Ω hole outer plate 301, and the intermediate shaft 102 is located in the Ω hole center and is matched with the hole to form a shaft hole gap. The quick mounting buckle is completed to install the outer door guard plate 5 or the inner door guard plate 6 in dismounting, the limiting stopper 104 prevents the arc surface rotating shaft body 1 from rotating reversely when the arc surface rotating shaft body 1 starts to rotate, thereby avoiding the error of the rotating direction during use. The arc surface boss 105 has the same principle as the arc surface cylindrical cam, converts the linear motion into the rotating operation of the arc surface rotating shaft body 1, and when reaching the critical point, the rotating angle is 45°, the hollow shaft 106 supports the arc surface boss 105, the cross-shaped hole in the hollow shaft 106 is matched with the transmission shaft 201 to drive the hollow shaft 106 to rotate. The circular ring body 202 is matched with the hollow shaft 106 to support the rotation of the hollow shaft 106. The rectangular notch 204 of the cuboid shell 205 is matched with the arc surface boss 105. The stopper connecting piece 107 is matched with the T-shaped shaft 207.The T-shaped shaft 207 is connected to the fixed sleeve housing 2. The drive shaft 201 of the T-shaped shaft 207 is inserted into the cross groove of the arc-shaped rotating shaft 1 to form a fit. The drive shaft 201 rotates together with the arc-shaped rotating shaft 1. Then, the crossbeam of the T-shaped shaft 207 is fixedly connected to the fixed sleeve housing 2. The torsional resistance of the T-shaped shaft generates a rebound force. In addition, when the arc-shaped rotating shaft 1 is rotated to a certain angle, the stop block connection 107 presses on the crossbeam of the T-shaped shaft 207, generating a contact interference rebound force. The function of the axial limiting end 109: The arc-shaped rotating shaft 1 has an axial limiting end 109 at the end. This pendant hole is the same as the pendant wrench hole 101d of the rectangular chuck 101. It can also be loosened and removed by using an L-shaped pendant wrench 7. The outer door panel 5 or the inner door panel 6 can be removed.

[0047] like Figures 1-8 As shown, the cross-sectional shape of the stop block connection 107 is a quarter-circular ring. There are two stop block connections 107 arranged 180° rotationally symmetrically. The stop block connections 107 are positioned between the hollow shaft 106 and the axial limiting end 109, connecting them. Since the outer diameter of the stop block connection 107 is smaller than the outer diameter of the hollow shaft 106 and the axial limiting end 109, the stop block connection 107, in conjunction with the first crossbeam 207a, the second crossbeam 207b, and the cylindrical base 207c, guides the circumferential rotation of the arc-shaped rotating shaft 1. The two stop block connections 107 form a stop block connection groove 107a. In use, the arc-shaped rotating shaft 1 and the fixed sleeve housing 2 are snapped together. The snapping process is performed simultaneously in two places: First, the drive shaft 201 of the fixed sleeve housing 2 is inserted into the hollow shaft 106 of the arc-shaped rotating shaft 1. The innermost part of the hollow shaft 106 has a cross groove that engages with the cross shaft. Secondly, the connecting beam 205a of the rectangular shell 205 of the fixed sleeve housing 2 passes over the wedge hook 108 of the arc-shaped rotating shaft 1. Under the action of the wedge mechanism, the connecting beam 205a is expanded. After the connecting beam 205a completely passes over the wedge hook 108, it is engaged in the stop connecting groove 107a of the stop connecting 107. The wedge hook 108 blocks the beam to prevent it from coming out, and the protrusions on both ends of the stop connecting groove 107a limit the connecting beam 205a at both ends, preventing it from moving in the front and back directions, thus achieving the engagement of the two. In summary, the arc-shaped rotating shaft 1 and the fixed sleeve housing 2 are engaged as a single unit to form a quick-release buckle assembly.

[0048] The function of the limit stop 104 is to prevent the arc-shaped rotating shaft 1 from reversing, thus acting as a limit. If the arc-shaped rotating shaft 1 reverses, the front end of the arc-shaped boss will also reverse, exposing the convex surface. During linear movement, it will jam the sheet metal rectangular hole and block the sheet metal rectangular hole from guiding the arc-shaped boss. The "T"-shaped shaft consists of a first crossbeam 207a, a second crossbeam 207b, a cylindrical base 207c, and a drive shaft 201. The first crossbeam 207a and the second crossbeam 207b at both ends of the "T"-shaped shaft are injection molded together with the fixed sleeve housing. There is a cylindrical base 207c in the middle of the two crossbeams. The vertical direction of the cylindrical base has a vertical shaft injection molded together, and the vertical shaft cross-section is cross-shaped. Thus, when the arc-shaped rotating shaft 1 rotates, its internal cross groove drives the T-shaped shaft 207, whose vertical shaft cross-section is cross-shaped, to rotate. Since the first crossbeam 207a and the second crossbeam 207b of the T-shaped shaft 207 are fixed as one piece by injection molding with the fixed sleeve housing 2, the first crossbeam 207a and the second crossbeam 207b will generate torsional rebound force.

[0049] like Figures 1-10 As shown, the chuck assembly, consisting of a rectangular chuck 101, an intermediate shaft 102, and a disc 103, is fitted onto the snap-fit ​​mounting base 3. The rectangular chuck 101 and disc 103 are clamped onto the outer plate 301 of the mounting base's Ω-hole, and the intermediate shaft 102 is located at the center of the Ω-hole, forming a shaft-hole clearance fit. The above describes the installation of the quick-release snap-fit ​​on the door panel 5 or inner door panel 6. Typically, the quick-release snap-fit ​​is first installed on the door panel as a whole, and then installed onto the rectangular sheet metal hole of the sheet metal 4.

[0050] like Figure 8 and Figure 16 As shown, the quick-release buckle is inserted into a rectangular sheet metal hole. Since the fixing sleeve 2 of the buckle is cuboid, it forms a rectangular fit with the sheet metal hole during the insertion process. The fixing sleeve 2 is fixed, so the arc-shaped rotating shaft 1 can rotate within the hole of the fixing sleeve 2. When the quick-release buckle enters the sheet metal hole, the arc-shaped boss 105 of the arc-shaped rotating shaft 1 rotates under the push of the rectangular sheet metal hole. When the sheet metal hole passes the critical point of the arc-shaped boss 105, the quick-release buckle generates a rebound force, causing the arc-shaped boss 105 to reverse. The sheet metal hole is caught by the barb structure of the arc-shaped boss 105, forming a snap-fit. In other words, the linear motion of the quick-release buckle entering the sheet metal 4 is converted into the rotational motion of the arc-shaped rotating shaft 1 due to the wedge-shaped arc surface of the arc-shaped boss 105. When the sheet metal hole passes the critical point of the arc-shaped boss 105, the angle of rotation of the arc-shaped rotating shaft 1 is 45°.

[0051] like Figures 8-15As shown, the quick-release buckle generates a rebound force after the sheet metal crosses the critical point of the arc-shaped boss 105. This rebound force has two components: First, at the rectangular chuck 101, which consists of a rectangular frame 101a, an elastic arc strip 101b, a beak-shaped pressure block 101c, and a star-shaped wrench hole 101d. The elastic arc strip 101b connects the rectangular frame 101a and the beak-shaped pressure block 101c at both ends. Because the rectangular frame 101a is fixed in the rectangular groove 303 of the buckle mounting base 3, it is fixed. When the arc-shaped rotating shaft 1 rotates, it drives the beak-shaped pressure block 101c to rotate, causing it to press against the elastic arc strip 101b, resulting in a free rebound force from the plastic material. Additionally, if an L-shaped box wrench 7 is used, it can be inserted into the box-shaped wrench hole d. Rotating the arc-shaped shaft 1 clockwise causes the height of the arc-shaped boss 105 to be lower than the edge of the sheet metal hole, eliminating the barb structure and preventing further engagement. This is the principle behind disassembling the quick-release clip. Secondly, at the T-shaped shaft 207, the T-shaped shaft 207 is connected to the fixed sleeve housing 2. The drive shaft 201 of the T-shaped shaft 207 is inserted into the cross groove of the arc-shaped shaft 1 to form a fit. The drive shaft 201 rotates together with the arc-shaped shaft 1. Then, the first crossbeam 207a and the second crossbeam 207b of the T-shaped shaft 207 are fixedly connected to the fixed sleeve housing 2. The torsional resistance of the T-shaped shaft generates a rebound force. The combined force of these two rebound forces constitutes the total rebound force of the quick-release clip. The stop block connection 107 abuts against the first crossbeam 207a and the second crossbeam 207b of the T-shaped shaft 207 to prevent the arc-shaped rotating shaft 1 from reversing. Reversing the rotation is not conducive to the arc-shaped rotating shaft 1 entering the sheet metal rectangular hole, nor is it conducive to the sheet metal rectangular hole guiding the arc-shaped rotating shaft 1.

[0052] like Figures 2-3 , Figure 4 and Figure 8 As shown, the curved rotating shaft 1 has a stop block 107 to prevent it from reversing when it starts to rotate, thus avoiding incorrect rotation direction during use. The curved rotating shaft 1 has an axial limiting end 109 at its end. This star-shaped hole is the same as the star-shaped wrench hole 101d of the rectangular chuck 101, and can also be loosened and removed by using an L-shaped star-shaped wrench 7.

[0053] like Figures 17-18 The diagram illustrates the principle of disassembling the inner door panel 6 and the outer door panel 5. For the inner door panel 6, because its front mounting plate has an elliptical hole, an L-shaped wrench 7 can be inserted through the elliptical hole in the door panel trim into the plum-shaped wrench hole 101d of the rectangular disc to loosen it. For the outer door panel 5, because its front sheet metal 4 has a hole, an L-shaped wrench 7 can be inserted through the sheet metal hole into the plum-shaped hole of the axial limiting end 109 of the curved rotating shaft 1 to loosen it.

[0054] It should be noted that the above description is merely a preferred embodiment of the present invention. The wrench hole can be a Torx hole or an internal hexagonal hole, including but not limited to the above, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0055] Those skilled in the art will readily understand that the above are merely preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, combinations, substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A quick-install buckle for a door panel, characterized in that: The device includes an arc-shaped rotating shaft (1) and a fixed sleeve housing (2). The arc-shaped rotating shaft (1) includes a hollow shaft (106). One end of the hollow shaft (106) is provided with a chuck assembly for connecting a snap-fit ​​mounting base (3) and an elastic rotation reset assembly that can drive the hollow shaft (106) to rotate and reset. The other end of the hollow shaft (106) is provided with two stop block connections (107). Each stop block connection (107) is shaped like a quarter ring. The two stop block connections (107) are arranged in a 180° mirror image relative to the central axis of the arc-shaped rotating shaft (1). Each stop block connection (107) is connected to... There is an axial limiting end (109), each axial limiting end (109) is arranged perpendicularly to the hollow shaft (106), and two axial limiting ends (109) are arranged in parallel and spaced apart. Each axial limiting end (109) is provided with a wedge hook (108). The outer circumferential surface of the hollow shaft (106) is provided with an arc-shaped boss (105) for cooperating with the rectangular sheet metal hole of the inner panel of the car door (4) to drive the arc-shaped rotating shaft (1) to rotate around its own central axis. The cross-sectional shape of the central hole of the hollow shaft (106) is polygonal. The fixed sleeve housing (2) includes a part for cooperating with the hollow shaft. (106) A matching annular body (202), on which a cuboid shell (205) corresponding to the shape of the rectangular sheet metal hole and capable of elastic deformation is connected. A rectangular notch (204) is provided on the circumferential surface of the cuboid shell (205) for avoiding the arc-shaped boss (105). A hole is provided on the end face of the cuboid shell (205) for avoiding the axial limiting end (109). The cuboid shell (205) cooperates with the wedge hook (108) to axially limit the arc-shaped rotating shaft (1). An injection molded part is provided inside the cuboid shell (205). A T-shaped shaft (207) is formed and can rotate around its own central axis. The T-shaped shaft (207) includes a cylindrical base (207c) arranged coaxially with the hollow shaft (106). A pair of crossbeams for matching and limiting the connection with the stop block (107) are symmetrically arranged on the circumference of the cylindrical base (207c). Each crossbeam is fixed to the inner wall of the cuboid shell (205). A transmission shaft (201) is arranged coaxially with the cylindrical base (207c) on its end face. The cross-sectional shape of the transmission shaft (201) corresponds to the cross-sectional shape of the central hole of the hollow shaft (106).

2. The quick-release buckle for the door panel according to claim 1, characterized in that: The chuck assembly includes a rectangular chuck (101), an intermediate shaft (102), and a disc (103) arranged coaxially. One end of the disc (103) is fixedly connected to the hollow shaft (106), and the other end is fixedly connected to the intermediate shaft (102). The intermediate shaft (102) is fixedly connected to the rectangular chuck (101). The diameter of the intermediate shaft (102) corresponds to the diameter of the Ω hole of the snap-fit ​​mounting base (3). The length of the intermediate shaft (102) corresponds to the width of the mounting groove of the snap-fit ​​mounting base (3).

3. The quick-release buckle for the door panel according to claim 2, characterized in that: The end face of the disc (103) is provided with a limiting block (104) for limiting the rotation direction of the arc-shaped rotating shaft (1).

4. The quick-release buckle for the door panel according to claim 2, characterized in that: The elastic rotation reset assembly includes a rectangular chuck (101) fixedly connected to the hollow shaft (106). The rectangular chuck (101) includes a rectangular frame (101a), an elastic arc strip (101b), and a bird beak-shaped pressure block (101c). The rectangular frame (101a) is fixedly connected to the snap-fit ​​mounting base (3). The bird beak-shaped pressure block (101c) is coaxially fixedly connected to the intermediate shaft (102). One end of the elastic arc strip (101b) is fixedly connected to the rectangular chuck (101), and the other end is fixedly connected to the bird beak-shaped pressure block (101c). The elastic arc strip (101b) includes at least two, and the two elastic arc strips (101b) are arranged symmetrically with respect to the bird beak-shaped pressure block (101c).

5. The quick-release buckle for the door panel according to claim 4, characterized in that: The beak-shaped pressure block (101c) has a plum blossom-shaped wrench hole on its end face; or / and each axial limiting end (109) has a plum blossom-shaped wrench hole on its end face.

6. The quick-release buckle for the door panel according to claim 1, characterized in that: The arc-shaped boss (105) is a slope that spirals upward along the central axis of the hollow shaft (106). The distance between the end face of the arc-shaped boss (105) perpendicular to the central axis of the hollow shaft (106) and the end face of the fixed sleeve housing (2) corresponds to the thickness of the inner panel sheet metal (4) of the car door.

7. The quick-release buckle for the door panel according to claim 1, characterized in that: Both the arc-shaped rotating shaft (1) and the fixed sleeve housing (2) are formed from plastic materials.

8. The quick-release buckle for the door panel according to claim 1, characterized in that: The arc-shaped rotating shaft (1) can rotate 45° around its own axis under the combined action of the rectangular sheet metal hole and the arc-shaped boss (105).

9. The quick-release buckle for the door panel according to claim 1, characterized in that: The drive shaft (201) is a cross shaft, and the center hole of the hollow shaft (106) is a cross hole.

10. A method for installing and removing a door panel, characterized in that: The system includes an interior door panel (6), an exterior door panel (5), a door inner panel sheet metal (4), and a door panel quick-release buckle as described in any one of claims 1-9. During installation, the buckle mounting base (3) is mounted on the arc-shaped rotating shaft (1), and the arc-shaped rotating shaft (1) and the fixed sleeve housing (2) are interlocked. The integral structure consisting of the buckle mounting base (3), the arc-shaped rotating shaft (1), and the fixed sleeve housing (2) is inserted into the rectangular sheet metal hole of the door inner panel sheet metal (4). The fixed sleeve housing (2) is limited by the rectangular sheet metal hole. The arc-shaped rotating shaft (1) is positioned at the arc-shaped boss (105) and the rectangular... When the rectangular sheet metal hole rotates under the action of the rectangular sheet metal hole, when the rectangular sheet metal hole crosses the critical point of the arc-shaped boss (105), the rectangular chuck (101) of the arc-shaped rotating shaft (1) generates a rebound force, the arc-shaped rotating shaft (1) reverses and resets, and the rectangular sheet metal hole is hooked by the barb structure on the arc-shaped boss (105) to form a snap-fit; when disassembling, the arc-shaped rotating shaft (1) is rotated 45° by the cooperation of the plum-shaped wrench (7) and the end face of the bird beak-shaped pressure block (101c) which is provided with plum-shaped wrench holes or the end face of the axial limiting end (109) which is provided with plum-shaped wrench holes, and the disassembly is completed.

Images