Positioning assembly, connecting assembly and vehicle

Abstract

The invention discloses a positioning assembly, a connecting assembly and a vehicle, the positioning assembly comprises a positioning buckle and a positioning pin, the positioning buckle comprises a sealing part and a penetrating part which are connected, the sealing part is provided with a communicating hole in the extending direction of the penetrating part in a penetrating mode, a containing cavity is formed in the penetrating part, and the containing cavity communicates with the communicating hole; bulges are arranged on the inner wall of the accommodating cavity; the positioning pin is provided with a first end and a second end which are opposite to each other, the first end is provided with a supporting part, the positioning pin is provided with a groove in the outer wall of the side, facing the second end, of the supporting part, the diameter of the cross section of the supporting part is larger than that of the cross section of the positioning pin in the groove, and after the supporting part is inserted into the containing cavity, the protrusion abuts against the groove; and a gap is kept between the supporting part and the bottom wall of the accommodating cavity. By adopting the positioning device, the radial movement of the positioning pin relative to the positioning buckle can be prevented, so that the radial movement of the positioning pin relative to the mounting hole can be avoided, and the assembly precision of parts can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle equipment, and particularly to a positioning component, a connection assembly and a vehicle. Background Art

[0002] Currently, in the field of installation of automotive plastic parts, in order to ensure the accuracy of part installation, a positioning structure is generally designed on the part. Among them, the positioning pin structure is a commonly used structure for positioning. A protrusion structure is separately designed outside the installation structure of one part, and the protrusion structure is directly inserted into the installation hole opened on the mating part to be installed, so as to perform positioning, realize pre-installation, and facilitate the fixation between the two parts. However, since there is a gap of 0.2 mm between the outer surface circumference of the positioning pin and the edge of its corresponding installation hole, and there is a gap of 0.4 mm at the extreme position after movement, the assembly accuracy is affected. Summary of the Invention

[0003] In view of this, the present invention provides a positioning component, a connection assembly and a vehicle to solve the above technical problems.

[0004] The positioning component provided by the present invention includes a positioning buckle and a positioning pin, wherein:

[0005] The positioning buckle includes a connected sealing part and an inserting part. The sealing part is provided with a communication hole extending along the extending direction of the inserting part. An accommodating cavity is arranged in the inserting part. The accommodating cavity is communicated with the communication hole, and a protrusion is arranged on the inner wall of the accommodating cavity;

[0006] The positioning pin is provided with opposite first and second ends. A supporting part is arranged at the first end. A groove is arranged on the outer wall of the positioning pin on the side where the supporting part faces the second end. The cross-sectional diameter of the supporting part is larger than the cross-sectional diameter of the positioning pin at the groove. After the supporting part is inserted into the accommodating cavity, the protrusion abuts against the groove, and a gap is maintained between the supporting part and the bottom wall of the accommodating cavity.

[0007] Optionally, the positioning buckle further includes: a plurality of hooks, and the plurality of hooks are fixed circumferentially on the outer wall of the inserting part. The width of the cross-section of each hook gradually decreases in the direction away from the sealing part.

[0008] Optionally, the positioning buckle further includes: a sealing layer, and the sealing layer sleeved on the inserting part abuts against the sealing part.

[0009] Optionally, the included angle between the side surface of the protrusion facing the sealing part and the axis of the inserting part is set to 20° - 45°.

[0010] Optionally, the distance between the end face of the protrusion away from the inner wall of the accommodation cavity and the inner wall of the accommodation cavity is set to 0.5 - 1 mm.

[0011] Optionally, the insertion part includes an inserted section and a guiding section connected to each other. The inserted section is connected to the sealing part, and the cross-sectional diameter of the guiding section gradually decreases in the direction away from the inserted section.

[0012] Optionally, the end face of the guiding section away from the inserted section is set as an arc surface.

[0013] Optionally, the connection between the inserted section and the guiding section is set with an arc transition.

[0014] The present invention also provides a connection assembly, including a first connecting piece and a second connecting piece to be connected, and further including the positioning assembly described in any one of the above. The positioning buckle of the positioning assembly is inserted into the installation hole formed on the first connecting piece, the second end of the positioning pin of the positioning assembly is fixed on the second connecting piece, and the positioning pin and the positioning buckle are arranged corresponding to each other.

[0015] The present invention also provides a vehicle, including the connection assembly described above.

[0016] The above technical solutions provided by the present invention, compared with the prior art, at least have the following beneficial effects:

[0017] By using the positioning assembly, connection assembly and vehicle of the present invention, there is no large gap between the positioning buckle and the installation hole, preventing the radial movement of the positioning buckle relative to the installation hole. The clamping and limiting between the protrusion on the inner wall of the positioning buckle and the groove on the outer wall of the positioning pin prevent the radial movement of the positioning pin relative to the positioning buckle, so that the positioning pin will not generate radial movement relative to the installation hole, and the assembly accuracy between parts can be improved. Description of the Drawings

[0018] Figure 1 Schematic diagram of the positioning buckle according to an embodiment of the present invention;

[0019] Figure 2 For Figure 1 Top view of the shown positioning buckle;

[0020] Figure 3 Schematic diagram of the positioning assembly assembled to a part according to an embodiment of the present invention;

[0021] Figure 4 For Figure 3 Cross-sectional view at the A - A position shown;

[0022] Figure 5 For Figure 4 Schematic diagram of the positioning buckle in the cross-sectional view shown;

[0023] Figure 6 For Figure 4 The schematic diagram of the positioning pin in the shown cross-sectional view.

[0024] Reference numerals:

[0025] 1: Positioning buckle; 101: Sealing part; 102: Insertion part; 1021: Accommodation cavity; 1022: Protrusion; 1023: Insertion section; 1024: Guide section; 103: Hook; 104: Sealing layer; 2: Positioning pin; 201: Support part; 202: Groove; 3: First connecting piece; 4: Second connecting piece. Specific embodiments

[0026] The following further illustrates the specific embodiments of the present invention with reference to the accompanying drawings.

[0027] It is easy to understand that according to the technical solution of the present invention, under the condition of not changing the essence of the present invention, those of ordinary skill in the art can use various structural ways and implementation ways that can be mutually replaced. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as all of the present invention or as a limitation or restriction on the technical solution of the invention.

[0028] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts, and thus may change accordingly according to their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms either.

[0029] Figure 1 The schematic diagram of the positioning buckle according to an embodiment of the present invention; Figure 2 For Figure 1 The top view of the shown positioning buckle; Figure 3 The schematic diagram of the positioning component assembled to the part according to an embodiment of the present invention; Figure 4 For Figure 3 The cross-sectional view at the A-A position shown; Figure 5 For Figure 4 The schematic diagram of the positioning buckle in the shown cross-sectional view; Figure 6 For Figure 4 The schematic diagram of the positioning pin in the shown cross-sectional view.

[0030] As Figures 1-6As shown, the positioning component includes a positioning buckle 1 and a positioning pin 2, where: The positioning buckle 1 includes a connected sealing part 101 and an inserting part 102. The sealing part 101 is provided with a communication hole running through in the extending direction of the inserting part 102. An accommodation cavity 1021 is arranged in the inserting part 102. The accommodation cavity 1021 communicates with the communication hole. A protrusion 1022 is arranged on the inner wall of the accommodation cavity 1021. The positioning pin 2 has opposite first and second ends. A support part 201 is arranged at the first end. A groove 202 is arranged on the outer wall of the positioning pin 2 on the side where the support part 201 faces the second end. The cross-sectional diameter of the support part 201 is larger than the cross-sectional diameter of the positioning pin 2 at the groove 202. After the support part 201 is inserted into the accommodation cavity 1021, the protrusion 1022 abuts against the groove 202, and a gap is maintained between the support part 201 and the bottom wall of the accommodation cavity 1021.

[0031] The positioning buckle 1 is a plastic part with certain elasticity. During use, fix the second end of the positioning pin 2 on one of the two parts to be connected. Insert the inserting part 102 of the positioning buckle 1 into the installation hole opened on the other part until the sealing part 101 of the positioning buckle 1 abuts against the surface of the inserted part. The outer diameter of the inserting part 102 matches the inner diameter of the installation hole, so that the positioning buckle 1 will not generate radial movement relative to the part. At the same time, the sealing part 101 closely adheres to the surface of the inserted part, further sealing the possible gap between the inserting part 102 and the part. Before connecting the two parts with a connecting piece, bring the positioning pin 2 fixed on one part close to the positioning buckle 1 inserted on the other part, and insert the support part 201 into the accommodation cavity 1021. The diameter of the support part 201 is larger than the minimum inner diameter at the position of the protrusion 1022. Thus, when the support part 201 is inserted into the accommodation cavity 1021 under the action of an external force and passes through the position of the protrusion 1022, it abuts against the protrusion 1022 and pushes the protrusion 1022 outwards, thereby causing the inserting part 102 to generate an outward deformation. After the support part 201 passes through the position of the protrusion 1022, the protrusion 1022 and the inserting part 102 lose the extrusion effect of the support part 201 and recover the deformation under the action of elastic force, and abut against the bottom of the groove 202 of the inserted groove 202. At this time, the clamping effect of the protrusion 1022 on the groove 202 opened on the positioning pin 2 limits the radial movement of the positioning pin 2, that is, limits the radial displacement between the two parts to be connected, completing the limiting and pre-installation of the parts. Subsequently, use other connecting pieces to fixedly connect the two parts.

[0032] By using the positioning component of the present invention, there is no large gap between the positioning buckle 1 and the mounting hole, preventing the positioning buckle 1 from generating radial movement relative to the mounting hole. The clamping and limiting between the protrusion 1022 on the inner wall of the positioning buckle 1 and the groove 202 on the outer wall of the positioning pin 2 prevent the positioning pin 2 from generating radial movement relative to the positioning buckle 1. Thus, the positioning pin 2 will not generate radial movement relative to the mounting hole, which can improve the assembly accuracy between parts.

[0033] In this embodiment, as Figure 1 、 Figure 2 shown, the sealing part 101 and the inserting part 102 are coaxial-connected cylinders. The sealing part 101 is selected as a flange with an elliptical cross-section, and the cross-section of the inserting part 102 is circular, and the cross-sectional area of the sealing part 101 is larger than the cross-sectional area of the inserting part 102. The sealing part 101 is provided with the communication hole through the axis, and the inserting part 102 is provided with the accommodating cavity 1021 along the axial extension direction. As Figure 4 、 Figure 5 shown, a circle of the protrusions 1022 is circumferentially arranged on the inner wall of the accommodating cavity 1021 at about the middle position. The protrusions 1022 have a certain width and height, making the inner diameter of the accommodating cavity 1021 smaller at this place. As Figure 4 and Figure 6 shown, the cross-section of the positioning pin 2 is circular. At the first end of the positioning pin 2, that is, the left end of the positioning pin 2 in the figure, the supporting part 201 is provided. The positioning pin 2 is provided with the groove 202 along the circumferential direction on the outer wall of the supporting part 201 facing the second end, that is, the right side of the supporting part 201 in the figure. To facilitate the smooth insertion of the supporting part 201 into the accommodating cavity 1021, the left end face of the supporting part 201 facing away from the groove 202 is set as an inclined plane facing the positioning buckle 1. In this embodiment, the positioning buckle 1 limits the positioning pin 2 in the Figure 2 in the horizontal direction and does not limit the positioning pin 2 in the vertical direction. Therefore, the cross-section of the accommodating cavity 1021 is set as an ellipse, and the protrusions 1022 are arranged in a circle along the inner wall of the accommodating cavity 1021. Therefore, the cross-section of the protrusions 1022 is also an ellipse, and the short axes are all along the Figure 2 in the horizontal direction, and the long axes are all along the Figure 2In the vertical direction, the inner diameter at the position of the protrusion 1022 in the short-axis direction is smaller than the outer diameter of the support portion 201 with a circular cross-section. Thus, when the support portion 201 is inserted into the receiving cavity 1021 and passes through the protrusion 1022, it can extrude the protrusion 1022 outward in the short-axis direction, causing the protrusion 1022 to deform outward. After passing through smoothly, the protrusion 1022 in the short-axis direction restores its deformation and abuts against the bottom of the groove 202 on the right side of the support portion 201, thereby clamping the positioning pin 2 and restricting its movement in the short-axis direction, while the protrusion 1022 in the long-axis direction does not clamp the bottom of the corresponding groove 202. When it is desired to limit the positioning pin 2 in all directions in the radial direction, the cross-section of the receiving cavity 1021 can be set to be circular, and the cross-section of the protrusion 1022 provided circumferentially on the inner wall of the receiving cavity 1021 is also set to be circular. Further, after the support portion 201 passes through the position where the protrusion 1022 is located, when the protrusion 1022 restores its deformation, it can abut against the bottom of the groove 202 in all circumferential directions, thereby restricting the movement of the positioning pin 2 in all radial directions. According to the actual application situation, the specific shape and size of the sealing portion 101, the insertion portion 102, the support portion 201, and the receiving cavity 1021 can all be adjusted. The specific setting position, shape, and size of the protrusion 1022 on the inner wall of the receiving cavity 1021, and the specific setting position, shape, and size of the groove 202 on the positioning pin 2 can all be adjusted, as long as the positioning buckle 1 can be matched and snapped into the mounting hole on the part, and the protrusion 1022 and the groove 202 can cooperate to abut against each other to restrict the radial movement of the positioning pin 2 relative to the positioning buckle 1.

[0034] Optionally, the positioning buckle 1 further includes a plurality of hooks 103. The plurality of hooks 103 are fixed to the circumferential direction of the outer wall of the insertion portion 102. The width of the cross-section of each hook 103 gradually decreases in the direction away from the sealing portion 101. When the insertion portion 102 is inserted into the mounting hole to the position where the hook 103 is located, the hook 103 enters the mounting hole under the action of an external force and deforms through the mounting hole under the extrusion of the inner wall of the mounting hole. After completely passing through the mounting hole, the hook 103 loses the extrusion of the inner wall of the mounting hole and restores its deformation, and its cross-section is larger than the cross-section of the mounting hole, thereby restricting the hook 103 from being disengaged from the mounting hole in the reverse direction, that is, ensuring that the positioning buckle 1 does not come out of the mounting hole.

[0035] In this embodiment, as Figure 1 、 Figure 5As shown, two hooks 103 are symmetrically arranged in the circumferential direction of the insertion part 102. The hooks 103 are made of plastic and have a certain elasticity. The cross-sectional width of the hook 103 gradually decreases in the direction away from the sealing part 101 and finally is flush with the outer wall of the insertion part 102. According to the actual application situation, the specific dimensions, the number of settings, and the specific setting positions on the outer wall of the insertion part 102 of the hook 103 can all be adjusted.

[0036] Optionally, the positioning buckle 1 further includes a sealing layer 104. The sealing layer 104 sleeves the insertion part 102 and abuts against the sealing part 101. By providing the sealing layer 104, when the insertion part 102 is inserted into the installation hole opened on the part and the sealing part 101 abuts against the surface of the part, the sealing layer 104 is squeezed by the sealing part 101, compressed and deformed, and covers the periphery of the installation hole of the part, thereby achieving the purpose of waterproofing.

[0037] In this embodiment, as Figure 1 、 Figure 5 shown, the sealing layer 104 sleeves the circumference of the insertion part 102 between the hook 103 and the sealing part 101, and abuts against the two on both sides respectively. The sealing layer 104 is made of waterproof foam, has a certain thickness, and the cross-sectional diameter is larger than the cross-sectional diameter of the sealing part 101. According to the actual application situation, the sealing layer 104 can also be made of other materials, and its specific shape and dimensions can also be adjusted.

[0038] Optionally, the angle between the side surface of the protrusion 1022 facing the sealing part 101 and the axis of the insertion part 102 is set to 20°-45°. If the angle between the side surface of the protrusion 1022 facing the sealing part 101 and the axis of the insertion part 102 is too large, when the positioning pin 2 is inserted into the receiving cavity 1021 to the protrusion 1022, the protrusion 1022 will generate too much resistance to the positioning pin 2, which is not conducive to the positioning pin 2 continuing to be inserted into the receiving cavity 1021; if the angle between the side surface of the protrusion 1022 facing the sealing part 101 and the axis of the insertion part 102 is too small, when the positioning pin 2 is inserted into the receiving cavity 1021 to the protrusion 1022, the side surface of the protrusion 1022 facing the sealing part 101 cannot play an adequate guiding role for the positioning pin 2, which is also not conducive to the positioning pin 2 being smoothly inserted into the receiving cavity 1021. By setting the side surface of the protrusion 1022 facing the sealing part 101 as an inclined surface at the above angle, it will neither generate too much resistance to the positioning pin 2 nor play an adequate guiding role for the positioning pin 2, which is conducive to guiding the positioning pin 2 to be smoothly inserted into the receiving cavity 1021.

[0039] In this embodiment, asFigure 4 , Figure 5 As shown, both side surfaces of the protrusion 1022 facing the sealing portion 101 and facing away from the sealing portion 101 are set as opposite inclined surfaces, so that the longitudinal section of the protrusion 1022 is integrally an isosceles trapezoid. As Figure 4 , Figure 6 shown, when the support portion 201 completely passes through the position where the protrusion 1022 is located, in order for the protrusion 1022 to smoothly move to the bottom of the groove 202, both inner walls of the groove 202 facing the sealing portion 101 and facing away from the sealing portion 101 are also set as opposite inclined surfaces, and the inclination angle of the inner wall of the groove 202 is approximately equal to the inclination angle of the side surface of the protrusion 1022.

[0040] Optionally, the distance between the end face of the protrusion 1022 away from the inner wall of the accommodation cavity 1021 and the inner wall of the accommodation cavity 1021 is set to 0.5 - 1 mm. If the distance between the end face of the protrusion 1022 away from the inner wall of the accommodation cavity 1021 and the inner wall of the accommodation cavity 1021 is too large, that is, the protrusion 1022 is too high, when the support portion 201 is inserted into the accommodation cavity 1021 to the protrusion 1022, the protrusion 1022 will generate too much resistance to the support portion 201, and the support portion 201 is not easy to pass through the protrusion 1022; if the distance between the end face of the protrusion 1022 away from the inner wall of the accommodation cavity 1021 and the inner wall of the accommodation cavity 1021 is too small, that is, the protrusion 1022 is too low, when the support portion 201 passes through the protrusion 1022 and the protrusion 1022 is engaged with the groove 202 on the outer wall of the positioning pin 2, the engagement relationship is not firm enough, affecting the stability of their connection. Setting the distance between the end face of the protrusion 1022 away from the inner wall of the accommodation cavity 1021 and the inner wall of the accommodation cavity 1021 within the above range is convenient for the support portion 201 to smoothly pass through the position where the protrusion 1022 is located and can ensure the stability of the engagement relationship between the protrusion 1022 and the groove 202.

[0041] Optionally, the insertion portion 102 includes an inserted section 1023 and a guiding section 1024 connected to each other. The inserted section 1023 is connected to the sealing portion 101, and the cross-sectional diameter of the guiding section 1024 gradually decreases in the direction away from the inserted section 1023. This setting reduces the difficulty of inserting the insertion portion 102 into the part mounting hole and is beneficial to improving work efficiency.

[0042] In this embodiment, as Figure 1 , Figure 4 and Figure 5As shown, the insertion section 1023 is arranged as a hollow cylinder, the guiding section 1024 is arranged as an approximately hollow cone, and the protrusion 1022 is arranged circumferentially on the inner wall of the insertion section 1023. One end of the guiding section 1024 facing away from the insertion section 1023 has the smallest cross-sectional diameter, so as to reduce the insertion resistance at the initial stage of inserting into the installation hole and enable the insertion part 102 to be smoothly inserted into the installation hole. According to the actual application situation, the specific shape and size of the insertion section 1023 and the guiding section 1024 can be adjusted.

[0043] Optionally, the end face of the guiding section 1024 facing away from the insertion section 1023 is arranged as an arc surface. With this arrangement, when the insertion part 102 is inserted into the installation hole, even if there is a slight deviation in the insertion position of the insertion section 1023 that is first inserted into the installation hole and interferes with the edge of the installation hole, it is convenient to slide smoothly into the installation hole along the edge of the installation hole by means of the arc surface of the end face.

[0044] As Figure 1 shown, the end face of the lower end of the guiding section 1024 is arranged as an arc surface and is a minor arc. According to the actual application situation, its specific radian can be adjusted.

[0045] Optionally, the connection between the insertion section 1023 and the guiding section 1024 is arranged with an arc transition. With this arrangement, when the connection position between the insertion section 1023 and the guiding section 1024 is inserted into the installation hole, if there is interference with the edge of the installation hole, it is convenient to slide smoothly into the installation hole by means of the transition arc surface.

[0046] The present invention also provides a connection assembly, including a first connector 3 and a second connector 4 that need to be connected, and further including the positioning assembly described in any of the above embodiments. The positioning buckle 1 of the positioning assembly is inserted into the installation hole opened on the first connector 3, and the second end of the positioning pin 2 of the positioning assembly is fixed on the second connector 4, and the positioning pin 2 is arranged corresponding to the positioning buckle 1.

[0047] When the connection assembly of the present invention is adopted, there is no large gap between the positioning buckle 1 and the installation hole, preventing the positioning buckle 1 from generating radial movement relative to the installation hole. The clamping and limiting between the protrusion 1022 on the inner wall of the positioning buckle 1 and the groove 202 on the outer wall of the positioning pin 2 prevent the positioning pin 2 from generating radial movement relative to the positioning buckle 1. Thus, the positioning pin 2 will not generate radial movement relative to the installation hole, and the assembly accuracy between parts can be improved.

[0048] In this embodiment, the first connector 3 is a metal mounting plate of the vehicle body, and the second connector 4 is a bumper bracket, as Figure 3 、 Figure 4As shown in the figure, mounting holes are provided on the metal mounting plate, and a positioning pin 2 is fixed at a position corresponding to the mounting holes on the bumper bracket, and the supporting portion 201 of the positioning pin 2 faces the metal mounting plate. Align the insertion portion 102 of the positioning buckle 1 with the mounting hole and insert it. Press the sealing portion 101 forcefully until it abuts against the metal mounting plate. Insert the supporting portion 201 of the positioning pin 2 on the bumper bracket into the accommodating cavity 1021 of the positioning buckle 1, and press the bumper bracket forcefully to make the supporting portion 201 pass through the narrower position where the protrusion 1022 is located in the accommodating cavity 1021, and make the protrusion 1022 clamp at the bottom of the groove 202 formed on the surface of the positioning pin 2 when it resumes deformation, so as to limit the radial movement of the positioning pin 2, thereby realizing the positioning of the bumper bracket relative to the body metal mounting plate and the pre-installation of the bumper bracket, ensuring the position accuracy of the bumper bracket, achieving the effect of zero-error movement of the bumper bracket, thus eliminating the poor assembly of parts caused by the inaccurate position of the bumper bracket and improving the matching performance of the bumper. According to the actual application situation, the first connecting member 3 and the second connecting member 4 can be any pair of parts that need to be positioned before connection.

[0049] The present invention also provides a vehicle, including the connection assembly described above.

[0050] When the vehicle of the present invention is adopted, there is no large gap between the positioning buckle 1 and the mounting hole, preventing the positioning buckle 1 from generating radial movement relative to the mounting hole. The clamping and limiting between the protrusion 1022 on the inner wall of the positioning buckle 1 and the groove 202 on the outer wall of the positioning pin 2 prevent the positioning pin 2 from generating radial movement relative to the positioning buckle 1. Thus, the positioning pin 2 will not generate radial movement relative to the mounting hole, which can improve the assembly accuracy between parts.

[0051] According to needs, the above technical solutions can be combined to achieve the best technical effect.

[0052] The above are only the principles and preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, based on the principles of the present invention, several other modifications can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A positioning component, characterized in that, It includes positioning buckles and positioning pins, including: The positioning buckle includes a sealing portion and an insertion portion connected to each other, the sealing portion is penetrated by a communication hole along the extension direction of the insertion portion, the insertion portion is provided with a receiving cavity, the receiving cavity is communicated with the communication hole, and the inner wall of the receiving cavity is provided with a protrusion; The positioning pin is provided with a first end and a second end opposite to each other, the first end is provided with a supporting portion, and the positioning pin is provided with a groove on the outer wall of the supporting portion on one side facing the second end, the cross-sectional diameter of the supporting portion is larger than the cross-sectional diameter of the positioning pin at the groove, and after the supporting portion is inserted into the accommodating cavity, the protrusion abuts against the groove, and a gap is maintained between the supporting portion and the bottom wall of the accommodating cavity.

2. The positioning component according to claim 1, wherein The positioning buckle also includes: A plurality of hooks are fixed to the circumference of the outer wall of the insertion portion, and the width of the cross section of each hook gradually decreases in a direction away from the sealing portion.

3. The positioning component according to claim 1 or 2, characterized in that The positioning buckle also includes: A sealing layer is provided, wherein the sealing layer is sleeved on the insertion portion and abuts against the sealing portion.

4. The positioning assembly according to claim 1 or 2, characterized in that: The angle between the side of the protrusion facing the sealing portion and the axis of the insertion portion is set to 20°-45°.

5. The positioning assembly according to claim 4, characterized in that: The distance between the end surface of the protrusion facing away from the inner wall of the accommodating cavity and the inner wall of the accommodating cavity is set to 0.5-1 mm.

6. The positioning assembly according to claim 1 or 2, characterized in that: The insertion portion includes an insertion section and a guide section that are connected. The insertion section is connected to the sealing portion. The cross-sectional diameter of the guide section gradually decreases in a direction away from the insertion section.

7. The positioning assembly according to claim 6, characterized in that: The end surface of the guide section facing away from one end of the insertion section is configured as an arc surface.

8. The positioning assembly according to claim 6, characterized in that: The connection between the insertion section and the guide section is configured as an arc transition.

9. A connection assembly, comprising a first connecting member and a second connecting member to be connected, characterized in that, It also includes the positioning assembly according to any one of claims 1 to 8, wherein the positioning buckle of the positioning assembly is inserted into the mounting hole opened on the first connecting member, the second end of the positioning pin of the positioning assembly is fixed on the second connecting member, and the positioning pin and the positioning buckle are arranged correspondingly.

10. A vehicle, characterized in that, Including the connection assembly described in claim 9.

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