Screw and vehicle

Abstract

The screw comprises a rod part, a flange part and a wrenching part which are connected in sequence, the flange part is provided with a first side face facing the rod part, the first side face surrounds the rod part and is provided with a plurality of rotation stopping teeth, and the rotation stopping teeth are arranged in the circumferential direction of the rod part; and a rotation stopping groove for accommodating at least part of the plate is defined between any two adjacent rotation stopping teeth. The screw provided by the invention has the advantages of high locking reliability on a plate and low loosening probability.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a screw and a vehicle. Background Technology

[0002] The FDS (Flow Drill Screws) process uses the central tightening shaft of the FDS equipment to transmit the high-speed rotation of the servo motor to the flow drill screw, which acts on the material to be connected. This generates frictional heat and, under the action of huge axial pressure, causes the material to undergo plastic deformation. Under the pressure of the flow drill screw, a columnar through hole is formed, which is then pierced by the tip of the flow drill screw and screwed into the material to be connected. Drilling, tapping, and tightening are all completed in one go on the FDS equipment, ultimately forming a fully engaged threaded connection between the material and the flow drill screw.

[0003] The flow drill screws in related technologies are usually not designed with physical anti-loosening structures. After being tightened on the machine tool, the torque gradually decreases. Since they are basically located in the invisible area after being installed on the machine tool, it is impossible to check the torque decay of the flow drill screws, resulting in a high probability of the flow drill screws coming loose. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide a screw that has the advantages of high locking reliability on sheet metal and low probability of loosening.

[0006] An embodiment of the present invention also proposes a vehicle.

[0007] The screw of this invention includes a shank, a flange, and a wrench portion connected in sequence. The flange has a first side facing the shank. The first side surrounds the shank and is provided with a plurality of anti-rotation teeth. The plurality of anti-rotation teeth are arranged circumferentially along the shank. An anti-rotation groove is defined between any two adjacent anti-rotation teeth for at least a portion of the plate to be received.

[0008] According to an embodiment of the present invention, the screw has a shank for tightening onto a plate, a flange for pressing against the surface of the plate, and a wrench for engaging with the inner hole of a wrench, so that the wrench can rotate the screw as a whole. Specifically, by providing multiple anti-rotation teeth on the first side of the flange, when the flange presses against the surface of the plate, the anti-rotation teeth partially insert into the plate, so that at least a portion of the plate is located in the anti-rotation groove between two adjacent anti-rotation teeth. With the cooperation of the anti-rotation groove and the plate, the relative fixation of the screw to the plate in the circumferential direction of the shank is effectively improved. After the screw is tightened onto the plate, torque reduction is less likely to occur, resulting in high locking reliability and a low probability of loosening.

[0009] In some embodiments, the anti-rotation tooth extends radially along the rod portion, and the axial dimension of the anti-rotation tooth in the rod portion gradually increases or decreases radially outward along the rod portion.

[0010] In some embodiments, the minimum and maximum axial dimensions of the anti-rotation tooth on the rod are d1 and d2, respectively, wherein 0.2mm≤d1≤0.3mm and 0.3mm≤d2≤0.45mm.

[0011] In some embodiments, the anti-rotation tooth has a circumferential dimension in the rod portion that gradually decreases in the direction away from the first side.

[0012] In some embodiments, the rod portion includes a drilled portion, a tapping portion, a threaded portion, and a threaded portion that are sequentially connected in a direction close to the flange portion. The outer surface of the drilled portion is spherical, and the diameter of the drilled portion gradually increases in the direction adjacent to the tapping portion.

[0013] In some embodiments, the wrench is configured to engage within the inner bore of a wrench, the inner circumferential surface of which defines a plurality of protrusions spaced circumferentially along the inner bore, and at least a portion of the outer circumferential surface of the wrench defines at least two first grooves for engaging the protrusions, the number of the first grooves being less than the number of the protrusions.

[0014] In some embodiments, the outer contour of the cross-section of the inner hole is a regular hexagon or a hexagonal quincunx shape, the number of the first grooves is two, and the outer peripheral surface of the wrench portion further defines two second grooves. The two second grooves and the two first grooves are arranged alternately and spaced along the circumference of the wrench portion. The inner wall surface of the second groove is an arc surface spaced apart from the inner peripheral surface of the inner hole, and the radius of the arc surface is R, wherein 10.5mm≤R≤11.5mm.

[0015] In some embodiments, the rod portion includes a drilled portion, a tapping portion, a threaded portion, and a threaded portion that are sequentially connected along the direction close to the flange portion. The outer contour of the cross-section of the tapping portion is polygonal or irregular, and the area of ​​the outer contour of the cross-section of the tapping portion gradually increases in the direction away from the drilled portion.

[0016] In some embodiments, the rod portion includes a drilled portion, a tapping portion, a screw-tapping portion, and a threaded portion connected sequentially along a direction close to the flange portion. The threaded portion is provided with a first external thread, and the screw-tapping portion is provided with a second external thread that engages with the first external thread. The diameter of the first external thread is equal to the diameter of the second external thread.

[0017] The outer contour of the cross-section of the tapping part is polygonal, and the second external thread includes multiple thread segments arranged at intervals along the circumference of the tapping part.

[0018] In some embodiments, the first side is provided with an annular groove for receiving a seal, the annular groove being located on the side of the anti-rotation tooth radially inward along the rod portion.

[0019] The vehicle according to embodiments of the present invention includes screws as described in any of the above embodiments.

[0020] The technical advantages of the vehicle according to the embodiments of the present invention are the same as the technical advantages of the screw in the above embodiments, and will not be repeated here. Attached Figure Description

[0021] Figure 1 This is an isometric view of a screw according to an embodiment of the present invention.

[0022] Figure 2 This is a front view of a screw according to an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 A magnified view of the middle flange area.

[0024] Figure 4 yes Figure 2 A magnified view of a section of the borehole.

[0025] Figure 5 This is a top view of a screw according to an embodiment of the present invention.

[0026] Figure 6 This is a bottom view of a screw according to an embodiment of the present invention.

[0027] Figure 7 This is a cross-sectional view of a screw according to an embodiment of the present invention.

[0028] Figure label:

[0029] 1. Drilling part; 2. Tapping part; 3. Tapping part; 31. Second external thread; 4. Threaded part; 41. First external thread; 5. Flange part; 51. First side; 52. Anti-rotation tooth; 53. Annular groove; 54. Anti-rotation groove; 6. Tightening part; 61. First groove; 62. Second groove. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following is combined Figures 1-7 A screw according to an embodiment of the present invention is described.

[0032] The screw of this embodiment of the invention includes a shank, a flange 5, and a wrench 6 connected in sequence. The flange 5 has a first side 51 facing the shank, the first side 51 surrounds the shank and is provided with a plurality of anti-rotation teeth 52, the plurality of anti-rotation teeth 52 are arranged circumferentially along the shank, and an anti-rotation groove 54 is defined between any two adjacent anti-rotation teeth 52 for at least a portion of the plate material to be received.

[0033] According to an embodiment of the present invention, the screw has a shank for tightening onto a plate, a flange 5 for pressing against the surface of the plate, and a wrench 6 for engaging with the inner hole of a wrench to allow the wrench to rotate the screw as a whole. By providing multiple anti-rotation teeth 52 on the first side 51 of the flange 5, when the flange 5 presses against the surface of the plate, the anti-rotation teeth 52 partially insert into the plate, so that at least a portion of the plate is located within the anti-rotation groove 54 between two adjacent anti-rotation teeth 52. With the cooperation of the anti-rotation groove 54 and the plate, the relative fixation of the screw to the plate in the circumferential direction of the shank is effectively improved. After the screw is tightened onto the plate, torque reduction is less likely, resulting in high locking reliability and a low probability of loosening.

[0034] It should be noted that when the anti-rotation tooth 52 initially contacts the plate, the rod part is basically in place with the internal thread on the plate and will no longer rotate relative to the plate. As a result, the anti-rotation tooth 52 will not move circumferentially relative to the plate and will not damage the plate. The anti-rotation tooth 52 will only compress the plate to plastically deform under the axial interaction force between the flange part 5 and the plate so that it partially enters the plate.

[0035] In some embodiments, such as Figure 1 , Figure 3 and Figure 6 As shown, the anti-rotation tooth 52 extends radially along the rod portion, and the axial dimension of the anti-rotation tooth 52 gradually increases or decreases radially outward along the rod portion.

[0036] When the anti-rotation tooth 52 is located away from the edge or surface of the first side 51 and forms an acute angle with the first side 51, the initial contact area between the anti-rotation tooth 52 and the plate is smaller. Consequently, the pressure required for the anti-rotation tooth 52 to penetrate into the plate is smaller, the difficulty of the anti-rotation tooth 52 penetrating into the plate is lower, the locking reliability between the screw and the plate is higher, and the probability of the screw loosening is lower.

[0037] Specifically, the axial dimension of the anti-rotation tooth 52 in the rod portion is the distance between the anti-rotation tooth 52 and the edge or surface of the first side surface 51. For example, as... Figure 3 As shown, the axial dimension of the anti-rotation tooth 52 in the rod is the distance between the edge of the anti-rotation tooth 52 away from the first side surface 51 and the first side surface 51.

[0038] In some embodiments, the minimum and maximum dimensions of the anti-rotation tooth 52 in the axial direction of the rod are d1 and d2, respectively, wherein 0.2mm≤d1≤0.3mm and 0.3mm≤d2≤0.45mm.

[0039] The design with d1 not exceeding 0.3mm and d2 not exceeding 0.45mm ensures that the anti-rotation tooth 52 is easier to insert into the plate, while also preventing it from sliding relative to the plate in the circumferential direction when the rod rotates relative to the plate due to its excessive size. The design with d1 greater than or equal to 0.2mm and d2 greater than or equal to 0.3mm ensures that the anti-rotation tooth 52 will not fail to meet the anti-rotation and anti-loosening effect due to its small size.

[0040] Specifically, the axial dimension of the anti-rotation tooth 52 in the rod gradually increases outward along the radial direction of the rod. The minimum axial dimension of the anti-rotation tooth 52 in the rod can be 0.2mm, 0.25mm and 0.3mm. At this time, the maximum axial dimension of the anti-rotation tooth 52 in the rod can be 0.3mm, 0.4mm and 0.45mm respectively.

[0041] In some embodiments, such as Figure 3 and Figure 6 As shown, the rod includes a drilled portion 1, a tapping portion 2, a threaded portion 3, and a threaded portion 4 connected sequentially along the direction close to the flange portion 5. The anti-rotation tooth 52 gradually decreases in the circumferential dimension of the threaded portion 4 in the direction away from the first side 51.

[0042] The thickness of the anti-rotation tooth 52 gradually decreases in the direction away from the first side 51, which further reduces the initial contact area between the anti-rotation tooth 52 and the plate, thus reducing the difficulty of the anti-rotation tooth 52 penetrating the plate.

[0043] Specifically, the outer contour of the anti-rotation tooth 52 is triangular. The drilling part 1 is used to contact the plate and rotate relative to it to generate high temperature through friction. The tapping part 2 is used to tap through holes in the plate. The tapping part 3 is used to tap internal threads in the through holes. The shank is used to engage with the internal threads. The drilling part 1, tapping part 2, tapping part 3, shank, flange part 5 and wrench part 6 of the screw are integrally formed.

[0044] In some embodiments, such as Figure 4 As shown, the outer surface of the drilled part 1 is spherical, and the diameter of the drilled part 1 gradually increases in the direction of the adjacent penetration part 2.

[0045] In the related art, the conical drilling part 1 of this embodiment produces less aluminum chips when drilling on the plate, and the probability of aluminum chips entering the external thread of the screw's tapping part 3 and threaded part 4 is lower, resulting in higher screw tightening reliability on the plate.

[0046] Specifically, the maximum diameter of the drilled portion 1 is less than or equal to the diameter of the sphere.

[0047] In some embodiments, the wrench 6 is configured to engage within the inner bore of a wrench, the inner circumferential surface of which defines a plurality of protrusions spaced circumferentially along the inner bore, and at least a portion of the outer circumferential surface of the wrench 6 defines at least two first grooves 61 for engaging the protrusions, the number of first grooves 61 being less than the number of protrusions.

[0048] Compared to related technologies where the cross-sectional outer contour of the wrench's tightening part 6 matches the cross-sectional contour of the wrench's inner hole, the wrench's tightening part 6 in this embodiment is smaller in volume. It does not require forming a first groove 61 equal in number to the protrusions; it only needs to ensure that at least two first grooves 61 can be formed to accommodate the corresponding protrusions, thus achieving relative circumferential fixation between the wrench and the screw. In this case, the wrench's tightening part 6 is lighter, and consequently, the screw is lighter, meeting the weight reduction requirements of vehicles using multiple screws.

[0049] In some embodiments, such as Figure 5 As shown, the outer contour of the cross-section of the inner hole is a regular hexagon or a hexagonal quincunx shape. There are two first grooves 61. The outer circumferential surface of the wrench part 6 also defines two second grooves 62. The two second grooves 62 and the two first grooves 61 are arranged alternately along the circumference of the wrench part 6. The inner wall surface of the second groove 62 is an arc surface that is spaced apart from the inner circumferential surface of the inner hole. The radius of the arc surface is R, where 10.5mm≤R≤11.5mm.

[0050] Two first grooves 61 are arranged opposite each other radially along the threaded portion 4, and two second grooves 62 are arranged opposite each other radially along the threaded portion 4. By setting the radius of the inner wall surface of the second groove 62 between 10.5 mm and 11.5 mm, the structural strength of the wrench part 6 can be guaranteed while further reducing the weight of the wrench part 6, thus further meeting the vehicle's lightweight requirements.

[0051] Specifically, taking an external hexagonal box wrench as an example, the weight of a single screw can be reduced by about 1g.

[0052] In some embodiments, such as Figure 6 As shown, the outer contour of the cross-section of the penetration part 2 is polygonal or irregular, and the area of ​​the outer contour of the cross-section of the penetration part 2 gradually increases in the direction away from the drilling part 1.

[0053] Compared to the punching part 2 with a circular outer contour in related technologies, the punching part 2 has a smaller contact area with the plate when punching through holes in the plate, making it easier and faster to punch through holes in the plate.

[0054] For example, the cross-sectional outer contour of the penetration part 2 is quadrilateral, such as a rhombus.

[0055] In some embodiments, such as Figure 6As shown, the threaded portion 4 is provided with a first external thread 41, and the tapping portion 3 is provided with a second external thread 31 that connects with the first external thread 41. The diameter of the first external thread 41 is equal to the diameter of the second external thread 31. The outer contour of the cross-section of the tapping portion 3 is polygonal, and the second external thread 31 includes multiple thread segments arranged at intervals along the circumference of the tapping portion 3.

[0056] At this time, when the tapping part 3 taps the internal thread in the through hole, the contact area with the inner wall of the through hole is smaller, and the rotational friction between the two is smaller. As a result, the integrity of the tapped internal thread is higher, and the first external thread 41 of the threaded part 4 is less likely to be damaged when it mates with the internal thread, and the tightening efficiency of the screw is higher.

[0057] Specifically, the outer contour of the cross-section of the tapping part 3 is quadrilateral, or rhomboid.

[0058] In some embodiments, such as Figure 2 and Figure 3 As shown, the first side 51 is provided with an annular groove 53 for accommodating the seal. The annular groove 53 is located on the side of the anti-rotation tooth 52 that is radially inward along the threaded portion 4. Thus, before the screw is tightened onto the plate, sealant can be filled into the annular groove 53. After the screw is tightened onto the plate, the solidified sealant is sandwiched between the plate and the screw to ensure the sealing of the connection between the screw and the plate.

[0059] The vehicle according to embodiments of the present invention includes screws as described in any of the above embodiments.

[0060] The technical advantages of the vehicle according to the embodiments of the present invention are the same as the technical advantages of the screw in the above embodiments, and will not be repeated here.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A screw, characterized in that, The screw includes a rod portion, a flange portion and a wrenching portion connected in sequence, the flange portion has a first side surface facing the rod portion, the first side surface surrounds the rod portion and is provided with a plurality of rotation-stopping teeth, the rotation-stopping teeth are arranged along the circumference of the rod portion, and at least part of a board is accommodated in a rotation-stopping groove defined between any two adjacent rotation-stopping teeth.

2. The screw of claim 1, wherein The rotation-stopping teeth extend along the radial direction of the rod portion, and the size of the rotation-stopping teeth in the axial direction of the rod portion gradually increases or decreases along the radial direction of the rod portion.

3. The screw of claim 2, wherein The minimum size and the maximum size of the rotation-stopping teeth in the axial direction of the rod portion are d1 and d2 respectively, wherein 0.2mm≤d1≤0.3mm and 0.3mm≤d2≤0.45mm.

4. The screw of claim 2, wherein The size of the rotation-stopping teeth in the circumferential direction of the rod portion gradually decreases in the direction away from the first side surface.

5. The screw of claim 1, wherein The rod portion includes a drilling portion, an entering portion, a screwing portion and a threaded portion connected in sequence in the direction close to the flange portion, the outer surface of the drilling portion is a spherical surface, and the diameter of the drilling portion gradually increases in the direction close to the entering portion.

6. The screw of claim 1, wherein The wrenching portion is used to fit in the inner hole of a wrench, the inner circumferential surface of the inner hole defines a plurality of protrusions arranged along the circumferential direction of the inner hole, and at least part of the outer circumferential surface of the wrenching portion defines at least two first grooves for fitting the protrusions, and the number of the first grooves is less than the number of the protrusions.

7. The screw of claim 6, wherein The cross-sectional outer contour of the inner hole is a regular hexagon or a hexagonal wulff shape, the number of the first grooves is two, the outer circumferential surface of the wrenching portion further defines two second grooves, the two second grooves and the two first grooves are alternately and spacedly arranged along the circumferential direction of the wrenching portion, the inner wall surface of the second groove is an arc surface spaced from the inner circumferential surface of the inner hole, and the radius of the arc surface is R, wherein 10.5mm≤R≤11.5mm.

8. The screw of claim 1, wherein The rod portion includes a drilling portion, an entering portion, a screwing portion and a threaded portion connected in sequence in the direction close to the flange portion, the cross-sectional outer contour of the entering portion is a polygon or a special shape, and the area of the cross-sectional outer contour of the entering portion gradually increases in the direction away from the drilling portion.

9. The screw of claim 1, wherein The rod portion includes a drilling portion, an entering portion, a screwing portion and a threaded portion connected in sequence in the direction close to the flange portion, the threaded portion is provided with a first external thread, the screwing portion is provided with a second external thread connected with the first external thread, and the diameter of the first external thread is equal to the diameter of the second external thread. The cross-sectional outer contour of the screwing portion is a polygon, and the second external thread includes a plurality of thread segments arranged along the circumferential direction of the screwing portion.

10. The screw of claim 1, wherein The first side surface is provided with an annular groove for accommodating a sealing element, and the annular groove is located on the side of the rotation-stopping teeth inward along the radial direction of the rod portion.

11. A vehicle characterized by comprising: The screw includes the screw according to any one of claims 1-10.

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